U.S. patent application number 12/917262 was filed with the patent office on 2011-02-24 for cooling system, control method thereof and equipment room.
This patent application is currently assigned to Huawei Technologies Co., Ltd.. Invention is credited to Yuping Hong, Yuening Li.
Application Number | 20110042057 12/917262 |
Document ID | / |
Family ID | 41339778 |
Filed Date | 2011-02-24 |
United States Patent
Application |
20110042057 |
Kind Code |
A1 |
Li; Yuening ; et
al. |
February 24, 2011 |
COOLING SYSTEM, CONTROL METHOD THEREOF AND EQUIPMENT ROOM
Abstract
A cooling system includes a buried heat exchange unit (301), a
first air-liquid heat exchanger (302), a second air-liquid heat
exchanger (303), a control device (304), a fluid conveying device
(305), and connecting pipes (307). A control method applicable to
the cooling system includes: acquiring environment information,
where the environment information includes at least one of the
following temperatures: an outdoor temperature of the equipment
room and a temperature of the soil surrounding buried pipes; and
controlling at least one of the at least two circulation pipelines
to be in an open state according to a control policy and the
acquired environment information, where a circulation fluid is
driven by the fluid conveying device to flow in the open
circulation pipeline. An equipment room using the cooling system is
also provided.
Inventors: |
Li; Yuening; (Shenzhen,
CN) ; Hong; Yuping; (Shenzhen, CN) |
Correspondence
Address: |
Docket Clerk/HTCL
P.O. Drawer 800889
Dallas
TX
75380
US
|
Assignee: |
Huawei Technologies Co.,
Ltd.
|
Family ID: |
41339778 |
Appl. No.: |
12/917262 |
Filed: |
November 1, 2010 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/CN2009/071838 |
May 18, 2009 |
|
|
|
12917262 |
|
|
|
|
Current U.S.
Class: |
165/253 ;
165/104.13; 165/45; 165/48.1; 165/59 |
Current CPC
Class: |
Y02B 10/40 20130101;
F24F 2005/0057 20130101; F24F 5/0046 20130101 |
Class at
Publication: |
165/253 ; 165/45;
165/59; 165/104.13; 165/48.1 |
International
Class: |
F25B 29/00 20060101
F25B029/00; F24J 3/08 20060101 F24J003/08; F24F 7/00 20060101
F24F007/00; F28D 15/00 20060101 F28D015/00 |
Foreign Application Data
Date |
Code |
Application Number |
May 23, 2008 |
CN |
200810067334.5 |
Claims
1. A cooling system, applied to an equipment room, and comprising a
first air-liquid heat exchanger, a second air-liquid heat
exchanger, a buried heat exchange unit, a control device, a fluid
conveying device, and connecting pipes, wherein the first
air-liquid heat exchanger is disposed in the equipment room, the
second air-liquid heat exchanger is disposed outside the equipment
room, the buried heat exchange unit is buried underground, and the
second air-liquid heat exchanger and the buried heat exchange unit
are connected by the connecting pipes to the first air-liquid heat
exchanger to form at least two circulation pipelines; and the
control device is configured to acquire environment information,
and control at least one of the at least two circulation pipelines
to be in an open state according to a control policy and the
acquired environment information, wherein a circulation fluid is
driven by the fluid conveying device to flow in the open
circulation pipeline, and the environment information comprises at
least one of the following temperatures: an outdoor temperature of
the equipment room and a temperature of the soil surrounding buried
pipes.
2. The system according to claim 1, wherein the first air-liquid
heat exchanger comprises a coil pipe structure, an air inlet, an
air outlet, and an air conveying device, and is configured to use
the air conveying device to suck in hot air in the equipment room
through the air inlet, wherein the hot air exchanges heat with the
circulation fluid flowing in the coil pipe structure, the hot air
returns to the equipment room as cold air after releasing the heat,
and the circulation fluid flowing in the coil pipe structure is
driven by the fluid conveying device to flow out of the first
air-liquid heat exchanger after absorbing the heat of the hot
air.
3. The system according to claim 1, wherein the second air-liquid
heat exchanger and the first air-liquid heat exchanger are
connected by the connecting pipes to form a first circulation
pipeline, and the buried heat exchange unit and the first
air-liquid heat exchanger are connected by the connecting pipes to
form a second circulation pipeline; and the control device is a
first control device, and is configured to acquire the environment
information, and control the first circulation pipeline to be in an
open state according to the control policy and the acquired
environment information, wherein the circulation fluid is driven by
the fluid conveying device to flow in the open first circulation
pipeline, and the environment information includes at least one of
the following temperatures: an outdoor temperature of the equipment
room and a temperature of the soil surrounding buried pipes; or the
control device is a first control device, and is configured to
acquire the environment information, and control the second
circulation pipeline to be in an open state according to the
control policy and the acquired environment information, wherein
the circulation fluid is driven by the fluid conveying device to
flow in the open second circulation pipeline, and the environment
information includes at least one of the following temperatures: an
outdoor temperature of the equipment room and a temperature of the
soil surrounding buried pipes; or the control device is a first
control device, and is configured to acquire the environment
information, and control the first circulation pipeline and the
second circulation pipeline to be in an open state according to the
control policy and the acquired environment information, wherein
the circulation fluid is driven by the fluid conveying device to
flow in the open first circulation pipeline and second circulation
pipeline, and the environment information includes at least one of
the following temperatures: an outdoor temperature of the equipment
room and a temperature of the soil surrounding buried pipes.
4. The system according to claim 3, wherein after the circulation
fluid flows into the second air-liquid heat exchanger along the
open first circulation pipeline, the second air-liquid heat
exchanger is configured to enable the circulation fluid flowing in
coil pipes of the second air-liquid heat exchanger to exchange the
heat with the air flowing outside the coil pipes, wherein the
circulation fluid with a lowered temperature is driven by the fluid
conveying device to circulate and flow back to the first air-liquid
heat exchanger along the open first circulation pipeline.
5. The system according to claim 3, wherein the buried heat
exchange unit comprises one or more groups of underground buried
pipes; when the circulation fluid flows into the buried heat
exchange unit along the open second circulation pipeline, the
buried heat exchange unit is configured to enable the circulation
fluid to transfer the heat to the soil when flowing in the
underground buried pipes, wherein the circulation fluid with a
lowered temperature is driven by the fluid conveying device to flow
back to the first air-liquid heat exchanger along the open second
circulation pipeline.
6. The system according to claim 1, wherein at least one control
valve is disposed on each of the circulation pipelines, and at
least one fluid conveying device is disposed on each of the
circulation pipelines and the at least one fluid conveying device
is disposed at the same pipe position of the circulation pipelines,
the control device is a first valve control device, configured to
control the opening or the closing of the corresponding control
valves according to the control policy and the acquired environment
information, to enable at least one circulation pipeline to be in
an open state, wherein the circulation fluid is driven by the fluid
conveying device to flow in the open circulation pipeline.
7. The system according to claim 1, wherein at least one control
valve is disposed on each of the circulation pipelines, and at
least one fluid conveying device is disposed on each of the
circulation pipelines separately, the control device is a second
valve control device, configured to control the opening or the
closing of the corresponding control valves, to enable at least one
circulation pipeline to be in an open state, and control the
corresponding fluid conveying device to drive the circulation fluid
to flow in the open circulation pipeline, according to the control
policy and the acquired environment information, wherein the
circulation fluid flows in the open circulation pipeline.
8. An equipment room, wherein a cooling system is applied to the
equipment room, the cooling system comprises a first air-liquid
heat exchanger, a second air-liquid heat exchanger, a buried heat
exchange unit, a control device, a fluid conveying device, and
connecting pipes; the first air-liquid heat exchanger is disposed
in the equipment room; the second air-liquid heat exchanger
disposed outside the equipment room, and the buried heat exchange
unit buried underground are connected by the connecting pipes to
the first air-liquid heat exchanger to form at least two
circulation pipelines; and the control device is configured to
acquire environment information, and control at least one of the at
least two circulation pipelines to be in an open state according to
a control policy and the acquired environment information, wherein
a circulation fluid is driven by the fluid conveying device to flow
in the open circulation pipeline, and the environment information
includes at least one of the following temperatures: an outdoor
temperature of the equipment room and a temperature of the soil
surrounding buried pipes.
9. The equipment room according to claim 8, wherein at least one
control valve is disposed on each of the circulation pipelines, at
least one fluid conveying device is disposed on each of the
circulation pipelines, and the at least one fluid conveying device
is disposed at the same pipe position of the circulation pipelines,
the control device is a first valve control device, configured to
control the opening or the closing of the corresponding control
valves according to the control policy and the acquired environment
information, to enable at least one circulation pipeline to be in
an open state, wherein the circulation fluid is driven by the fluid
conveying device to flow in the open circulation pipeline.
10. The equipment room according to claim 8, wherein at least one
control valve is disposed on each of the circulation pipelines, and
at least one fluid conveying device is disposed on each of the
circulation pipelines separately, the control device is a second
valve control device, configured to control the opening or the
closing of the corresponding control valves to enable at least one
circulation pipeline to be in an open state, and control the
corresponding fluid conveying device to drive the circulation fluid
to flow in the open circulation pipeline according to the control
policy and the acquired environment information, wherein the
circulation fluid flows in the open circulation pipeline.
11. The equipment room according to claim 8, wherein the second
air-liquid heat exchanger and the first air-liquid heat exchanger
are connected by the connecting pipes to form a first circulation
pipeline, and the buried heat exchange unit and the first
air-liquid heat exchanger are connected by the connecting pipes to
form a second circulation pipeline; and a first control valve and a
second control valve are disposed on the first circulation
pipeline, and a third control valve and a fourth control valve are
disposed on the second circulation pipeline, the control device is
a third valve control device, configured to control the opening of
the first control valve and the second control valve according to
the control policy and the acquired environment information,
wherein the circulation fluid flows in the first circulation
pipeline on which the opened control valves are arranged; or the
control device is a third valve control device, configured to
control the opening of the third control valve and the fourth
control valve according to the control policy and the acquired
environment information, wherein the circulation fluid flows in the
second circulation pipeline on which the opened control valves are
arranged; or the control device is a third valve control device,
configured to control the opening of the first control valve and
the second control valve and the opening of the third control valve
and the fourth control valve according to the control policy and
the acquired environment information, wherein the circulation fluid
flows in the first circulation pipeline and the second circulation
pipeline on which the opened control valves are arranged.
12. The equipment room according to claim 8, wherein the control
device comprises: an environment information acquiring unit,
configured to acquire the environment information, wherein the
environment information includes at least one of the following
temperatures: an outdoor temperature of the equipment room and a
temperature of the soil surrounding buried pipes; and a control
unit, configured to control at least one of the at least two
circulation pipelines to be in an open state according to the
control policy and the environment information that is acquired by
the environment information acquiring unit, wherein the circulation
fluid is driven by the fluid conveying device to flow in the open
circulation pipeline.
13. The equipment room according to claim 12, wherein the
environment information acquiring unit is further configured to
acquire an indoor temperature of the equipment room; and the
control unit is further configured to perform corresponding fan
speed regulation control on a fan of the second air-liquid heat
exchanger according to the acquired outdoor temperature of the
equipment room and association information between the outdoor
temperature information and fan speeds of the fan of the second
air-liquid heat exchanger; or the control unit is further
configured to perform corresponding fan speed regulation control on
a fan of the first air-liquid heat exchanger according to the
acquired indoor temperature of the equipment room and association
information between the indoor temperature information and fan
speeds of the fan of the first air-liquid heat exchanger; or the
control unit is further configured to perform corresponding fan
speed regulation control on a fan of the second air-liquid heat
exchanger according to the acquired outdoor temperature of the
equipment room and association information between the outdoor
temperature information and fan speeds of the fan of the second
air-liquid heat exchanger; and to perform corresponding fan speed
regulation control on a fan of the first air-liquid heat exchanger
according to the acquired indoor temperature of the equipment room
and association information between the indoor temperature
information and fan speeds of the fan of the first air-liquid heat
exchanger.
14. A control method, applicable to a cooling system comprising a
buried heat exchange unit, a first air-liquid heat exchanger, a
second air-liquid heat exchanger, a control device, a fluid
conveying device, and connecting pipes, the cooling system being
applied to an equipment room, wherein the second air-liquid heat
exchanger and the buried heat exchange unit are connected by the
connecting pipes to the first air-liquid heat exchanger to form at
least two circulation pipelines, the method comprising: acquiring
environment information, wherein the environment information
comprises at least one of the following temperatures: an outdoor
temperature of the equipment room and a temperature of the soil
surrounding buried pipes; and controlling at least one of the at
least two circulation pipelines to be in an open state according to
a control policy and the acquired environment information, wherein
a circulation fluid is driven by the fluid conveying device to flow
in the open circulation pipeline.
15. The method according to claim 14, wherein when the second
air-liquid heat exchanger and the first air-liquid heat exchanger
are connected by the connecting pipes to form a first circulation
pipeline, and the buried heat exchange unit and the first
air-liquid heat exchanger are connected by the connecting pipes to
form a second circulation pipeline, the controlling at least one of
the at least two circulation pipelines to be in an open state
according to a control policy and the acquired environment
information, wherein a circulation fluid is driven by the fluid
conveying device to flow in the open circulation pipeline
comprises: controlling the opening of the first circulation
pipeline according to the control policy and the acquired
environment information, wherein the circulation fluid flowing out
of the first air-liquid heat exchanger flows into the corresponding
second air-liquid heat exchanger through the first circulation
pipeline to perform the cooling, and circulates and flows back to
the first air-liquid heat exchanger through the first circulation
pipeline; or controlling the opening of the second circulation
pipeline according to the control policy and the acquired
environment information, wherein the circulation fluid flowing out
of the first air-liquid heat exchanger flows into the corresponding
buried heat exchange unit through the second circulation pipeline
to perform the cooling, and flows back to the first air-liquid heat
exchanger through the second circulation pipeline; or controlling
the opening of the first circulation pipeline and the second
circulation pipeline according to the control policy and the
acquired environment information, wherein the circulation fluid
flowing out of the first air-liquid heat exchanger flows into the
corresponding second air-liquid heat exchanger through the first
circulation pipeline to perform the cooling, and circulates and
flows back to the first air-liquid heat exchanger through the first
circulation pipeline; and, the circulation fluid flowing out of the
first air-liquid heat exchanger flows into the corresponding buried
heat exchange unit through the second circulation pipeline to
perform the cooling, and flows back to the first air-liquid heat
exchanger through the second circulation pipeline.
16. The method according to claim 14, wherein at least one control
valve is disposed on each of the circulation pipelines, and at
least one fluid conveying device is disposed on each of the
circulation pipelines, and the at least one fluid conveying device
is disposed at the same pipe position of the circulation pipelines,
the controlling at least one of the at least two circulation
pipelines to be in an open state according to a control policy and
the acquired environment information, wherein a circulation fluid
is driven by the fluid conveying device to flow in the open
circulation pipeline comprises: controlling the opening or the
closing of the corresponding control valves according to the
control policy and the acquired environment information, to enable
at least one circulation pipeline to be in an open state, wherein
the circulation fluid is driven by the fluid conveying device to
flow in the open circulation pipeline.
17. The method according to claim 14, wherein at least one control
valve is disposed on each of the circulation pipelines, and at
least one fluid conveying device is disposed on each of the
circulation pipelines separately, the controlling at least one of
the at least two circulation pipelines to be in an open state
according to a control policy and the acquired environment
information, wherein a circulation fluid is driven by the fluid
conveying device to flow in the open circulation pipeline
comprises: controlling the opening or the closing of the
corresponding control valves to enable at least one circulation
pipeline to be in an open state, and controlling the corresponding
fluid conveying device to drive the circulation fluid in the open
circulation pipeline to flow, according to the control policy and
the acquired environment information, wherein the circulation fluid
flows in the open circulation pipeline.
18. The method according to claim 14, wherein the acquiring
environment information, wherein the environment information
comprises at least one of the following temperatures: an outdoor
temperature of the equipment room and a temperature of the soil
surrounding buried pipes comprises: acquiring the outdoor
temperature T1 of the equipment room and an indoor temperature T2
of the equipment room; when the second air-liquid heat exchanger
and the first air-liquid heat exchanger are connected by the
connecting pipes to form a first circulation pipeline, and the
buried heat exchange unit and the first air-liquid heat exchanger
are connected by the connecting pipes to form a second circulation
pipeline, the controlling at least one of the at least two
circulation pipelines to be in an open state according to a control
policy and the acquired environment information comprises: when the
outdoor temperature T1 of the equipment room is higher than a
designed maximum working temperature Tf of the second air-liquid
heat exchanger, controlling the opening of the second circulation
pipeline, wherein the circulation fluid is driven by the fluid
conveying device to flow in the open second circulation pipeline;
when the outdoor temperature T1 of the equipment room is lower than
or equal to the designed maximum working temperature Tf of the
second air-liquid heat exchanger, controlling the opening of the
first circulation pipeline, wherein the circulation fluid is driven
by the fluid conveying device to flow in the open first circulation
pipeline; and when the indoor temperature T2 of the equipment room
is higher than an indoor maximum allowed temperature Ts of the
equipment room and the outdoor temperature T1 of the equipment room
is higher than the designed maximum working temperature Tf of the
second air-liquid heat exchanger, controlling the opening of the
first circulation pipeline and the second circulation pipeline,
wherein the circulation fluid is driven by the fluid conveying
device to flow in the open first circulation pipeline and second
circulation pipeline.
19. The method according to claim 14, wherein the acquiring
environment information, wherein the environment information
comprises at least one of the following temperatures: an outdoor
temperature of the equipment room and a temperature of the soil
surrounding buried pipes comprises: acquiring the outdoor
temperature T1 of the equipment room and the temperature T3 of the
soil surrounding the underground buried pipes; when the second
air-liquid heat exchanger and the first air-liquid heat exchanger
are connected by the connecting pipes to form a first circulation
pipeline, and the buried heat exchange unit and the first
air-liquid heat exchanger are connected by the connecting pipes to
form a second circulation pipeline, the controlling at least one of
the at least two circulation pipelines to be in an open state
according to a control policy and the acquired environment
information comprises: when the temperature T3 of the soil
surrounding the underground buried pipes is lower than a designed
maximum temperature Tm of the soil surrounding the underground
buried pipes, controlling the opening of the second circulation
pipeline, wherein the circulation fluid is driven by the fluid
conveying device to flow in the open second circulation pipeline;
when the temperature T3 of the soil surrounding the underground
buried pipes is higher than or equal to the designed maximum
temperature Tm of the soil surrounding the underground buried pipes
and the outdoor temperature T1 of the equipment room is lower than
or equal to a designed maximum working temperature Tf of the second
air-liquid heat exchanger, controlling the opening of the first
circulation pipeline, wherein the circulation fluid is driven by
the fluid conveying device to flow in the open first circulation
pipeline; and when the temperature T3 of the soil surrounding the
underground buried pipes is higher than or equal to the designed
maximum temperature Tm of the soil surrounding the underground
buried pipes and the outdoor temperature T1 of the equipment room
is higher than the designed maximum working temperature Tf of the
second air-liquid heat exchanger, controlling the opening of the
first circulation pipeline and the second circulation pipeline,
wherein the circulation fluid is driven by the fluid conveying
device to flow in the open first circulation pipeline and second
circulation pipeline.
20. A computer-readable storage medium having computer executable
instructions for performing a control method, applicable to a
cooling system comprising a buried heat exchange unit, a first
air-liquid heat exchanger, a second air-liquid heat exchanger, a
control device, a fluid conveying device, and connecting pipes, the
cooling system being applied to an equipment room, wherein the
second air-liquid heat exchanger and the buried heat exchange unit
are connected by the connecting pipes to the first air-liquid heat
exchanger to form at least two circulation pipelines, the method
comprising: acquiring environment information, wherein the
environment information comprises at least one of the following
temperatures: an outdoor temperature of the equipment room and a
temperature of the soil surrounding buried pipes; and controlling
at least one of the at least two circulation pipelines to be in an
open state according to a control policy and the acquired
environment information, wherein a circulation fluid is driven by
the fluid conveying device to flow in the open circulation
pipeline.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The application is a continuation of International
Application No. PCT/CN2009/071838, filed on May 18, 2009, which
claims priority to Chinese Patent Application No. 200810067334.5,
filed on May 23, 2008, both of which are hereby incorporated by
reference in their entireties.
TECHNICAL FIELD
[0002] The present invention relates to the field of the cooling
technology, and more particularly to a cooling system, a cooling
method, and an equipment room based on ground source heat pump
technology.
BACKGROUND
[0003] Currently, the ground source heat pump technology is applied
to the field of building power-saving. A ground source heat pump is
a high-efficiency power-saving system that utilizes simple layer of
geothermal resources (also referred to as ground energy, including
ground water, soil, and surface water) and provides both heating
and cooling functions.
[0004] With the development of the communication technology, the
communication apparatuses in an outdoor integrated equipment room
are arranged at a higher density, and operate 24 hours a day
without interruption, so a large amount of heat is generated.
Because the communication apparatuses generate heat, and the
environment temperature is also high sometimes, it is not good for
cooling the apparatuses. In addition, the communication apparatuses
in the equipment room are required to operate in a specific
environment temperature range, and when the environment temperature
is too high, the communication apparatuses may be damaged.
Therefore, for the current outdoor integrated equipment room, it
has become an urgent problem to be solved to cool down the
equipment room.
[0005] FIG. 1 is a schematic diagram of an equipment room that uses
air conditioners to cool the communication apparatuses in the
equipment room in the prior art. Referring to FIG. 1, at least one
communication apparatus 103 is disposed in the equipment room 100,
and air conditioners 101 and 102 are installed on a side wall of
the equipment room 100. Here, the air conditioners 101 and 102 are
generally window air conditioners or wall-mounted air conditioners,
and are configured to control the air in the equipment room at a
suitable temperature.
[0006] FIG. 2 is a schematic diagram of an equipment room that uses
a cooling system including air conditioners and direct ventilation
to cool the communication apparatuses in the equipment room in the
prior art. Referring to FIG. 2, at least one communication
apparatus 205 is disposed in the equipment room 200, and air
conditioners 203 and 204 are installed on a side wall of the
equipment room 200. Here, the air conditioners 203 and 204 are
generally window air conditioners or wall-mounted air conditioners.
In addition, an air outlet control device 202 is opened at a top of
a left side wall of the equipment room 200, and an air inlet
control device 201 is opened at a bottom of a right side wall of
the equipment room 200. The air conditioners 203 and 204 form an
air conditioning system, and the ventilation control devices 201
and 202 form a direct ventilation system. As shown in FIG. 2, the
operating principles of the direct ventilation system are as
follows: cold air out of the equipment room enters the equipment
room from the air inlet control device 201, and takes out the heat
of the equipment room when passing through the equipment room, and
hot air leaves the equipment room from the air outlet control
device 202. Normally, the direct ventilation system is used when
the environment temperature outside the equipment room is low, and
on the contrary, the air conditioning system is used when the
environment temperature outside the equipment room is high.
[0007] During the research on the prior art, the inventors of the
present invention find that the prior art at least has the
following problems: the air conditioning cooling system used in the
equipment room currently has high power consumption, and has an
impact on the outdoor environment; the cooling system including air
conditioners and direct ventilation consumes less power than the
cooling system using only air conditioners, but the direct
ventilation unit of the former system is affected by the air
quality. Therefore, the application scenarios are limited.
SUMMARY
[0008] The embodiments of the present invention are directed to a
cooling system, a control method, and an equipment room, which
effectively cool the equipment room, and save power at the same
time when controlling a temperature of air in the equipment room at
a suitable temperature.
[0009] Embodiments of the present invention provide the following
technical solutions:
[0010] A cooling system is provided. The cooling system is applied
to an equipment room, and the system includes a first air-liquid
heat exchanger, a second air-liquid heat exchanger, a buried heat
exchange unit, a control device, a fluid conveying device, and
connecting pipes. The first air-liquid heat exchanger is disposed
in the equipment room, the second air-liquid heat exchanger is
disposed outside the equipment room, and the buried heat exchange
unit is buried underground. The second air-liquid heat exchanger
and the buried heat exchange unit are connected by the connecting
pipes to the first air-liquid heat exchanger to form at least two
circulation pipelines.
[0011] The control device is configured to acquire environment
information, and control at least one of the at least two
circulation pipelines to be in an open state according to a control
policy and the acquired environment information, where the
environment information includes at least one of the following
temperatures: an outdoor temperature of the equipment room and a
temperature of the soil surrounding buried pipes. A circulation
fluid is driven by the fluid conveying device to flow in the open
circulation pipeline.
[0012] An equipment room is provided. A cooling system including a
first air-liquid heat exchanger, a second air-liquid heat
exchanger, a buried heat exchange unit, a control device, a fluid
conveying device, and connecting pipes is applied to the equipment
room. The first air-liquid heat exchanger is disposed in the
equipment room. The second air-liquid heat exchanger disposed
outside the equipment room and the buried heat exchange unit buried
underground are connected by the connecting pipes to the first
air-liquid heat exchanger to form at least two circulation
pipelines.
[0013] The control device is configured to acquire environment
information, and control at least one of the at least two
circulation pipelines to be in an open state according to a control
policy and the acquired environment information, where the
environment information includes at least one of the following
temperatures: an outdoor temperature of the equipment room and a
temperature of the soil surrounding buried pipes. A circulation
fluid is driven by the fluid conveying device to flow in the open
circulation pipeline.
[0014] A control method is provided. The control method is
applicable to a cooling system including a buried heat exchange
unit, a first air-liquid heat exchanger, a second air-liquid heat
exchanger, a control device, a fluid conveying device, and
connecting pipes. The cooling system is applied to an equipment
room. The second air-liquid heat exchanger and the buried heat
exchange unit are connected by the connecting pipes to the first
air-liquid heat exchanger to form at least two circulation
pipelines. The control method includes:
[0015] acquiring environment information, where the environment
information includes at least one of the following temperatures: an
outdoor temperature of the equipment room and a temperature of the
soil surrounding buried pipes; and
[0016] controlling at least one of the at least two circulation
pipelines to be in an open state according to a control policy and
the acquired environment information, where a circulation fluid
flowing in the open circulation pipeline.
[0017] In the embodiments of the present invention, according to
the preset control policy and the acquired environment information,
the corresponding circulation pipelines are controlled to be in an
open state and/or to be in a close state, so that heat in the
equipment room is transferred to the circulation fluid through the
first air-liquid heat exchanger, and the circulation fluid flows to
the second air-liquid heat exchanger, and/or the buried heat
exchange unit to perform the cooling. Thus, the air in the
equipment room is controlled at the suitable temperature.
[0018] Moreover, in the embodiments of the present invention, the
power is mainly consumed by the fluid conveying device and air
conveying devices in the two air-liquid heat exchangers. Therefore,
the present invention has better power-saving performance than
conventional air conditioning systems.
[0019] Further, in the embodiments of the present invention, the
buried heat exchange unit and the outdoor first air-liquid heat
exchanger are used alternately and/or simultaneously, so as to
prevent the possibility of continuously dissipating heat to the
underground soil, and make the soil temperature to have time to
recover. Thus, the problem of low cooling capabilities of the
system caused by a high underground soil temperature is prevented,
where the high underground soil temperature occurs because the
underground soil receives the heat for a long time.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] FIG. 1 is a schematic diagram of a common air conditioning
cooling system for an equipment room in the prior art;
[0021] FIG. 2 is a schematic diagram of a common cooling system
including air conditioners and direct ventilation for an equipment
room in the prior art;
[0022] FIG. 3 is a schematic diagram of heat transfer of a cooling
system for an equipment room according to an embodiment of the
present invention;
[0023] FIG. 4 is a schematic diagram of a cooling system according
to Embodiment 1 of the present invention;
[0024] FIG. 5 is a schematic diagram of a cooling system according
to Embodiment 2 of the present invention;
[0025] FIG. 6 is a schematic diagram of a cooling system applied to
an equipment room according to Embodiment 3 of the present
invention;
[0026] FIG. 7 is a schematic diagram of a cooling system according
to Embodiment 4 of the present invention;
[0027] FIG. 8 is a schematic diagram of a cooling system according
to Embodiment 5 of the present invention;
[0028] FIG. 9 is a schematic diagram of a cooling system according
to Embodiment 6 of the present invention;
[0029] FIG. 10 is a schematic diagram of a cooling system according
to Embodiment 7 of the present invention;
[0030] FIG. 11 is a schematic diagram of internal modules of a
control device of a cooling system according to an embodiment of
the present invention;
[0031] FIG. 12 is a flow chart of a control method according to an
embodiment of the present invention;
[0032] FIG. 13 is a detailed flow chart of a control method
according to Embodiment 1 of the present invention;
[0033] FIG. 14 is a detailed flowchart of a control method
according to Embodiment 2 of the present invention;
[0034] FIG. 15 is a detailed flow chart of a control method
according to Embodiment 3 of the present invention;
[0035] FIG. 16 is a schematic diagram of a fan speed regulating
policy of a second air-liquid heat exchanger in a cooling system
according to an embodiment of the present invention; and
[0036] FIG. 17 is a schematic diagram of a fan speed regulating
policy of a first air-liquid heat exchanger in a cooling system
according to an embodiment of the present invention.
DETAILED DESCRIPTION
[0037] To make the objectives, technical solutions, and advantages
of the present invention more comprehensible, the present invention
is described in detail in the following with reference to the
accompanying drawings and the embodiments.
[0038] FIG. 3 is a schematic diagram of heat transfer of a cooling
system for an equipment room according to an embodiment of the
present invention. As shown in FIG. 3, as a medium, a circulation
fluid transfers heat of air in the equipment room to outside
environment air and/or underground soil. When the outdoor
temperature of the equipment room is low, for example, when the
outside environment temperature is low in winter, a heat transfer
process 10 is adopted to transfer the heat in the equipment room to
the outside environment air; and when the outdoor temperature of
the equipment room is high, for example, when the outside
environment temperature is high in summer, a heat transfer process
20 is adopted to transfer the heat in the equipment room to the
underground soil. Thus, the heat in the equipment room can be
dissipated to control the equipment room at a suitable temperature,
the power-saving effect is achieved, and the problem of low cooling
capabilities of the system caused by a high underground soil
temperature is prevented, where the high underground soil
temperature occurs because the underground soil receives the heat
for a long time.
[0039] In an embodiment, the present invention provides a cooling
system. The cooling system is applied to an equipment room, and
includes a first air-liquid heat exchanger, a second air-liquid
heat exchanger, a buried heat exchange unit, a control device, a
fluid conveying device, and connecting pipes. The first air-liquid
heat exchanger is disposed in the equipment room, the second
air-liquid heat exchanger is disposed outside the equipment room,
and the buried heat exchange unit is buried underground. The second
air-liquid heat exchanger and the buried heat exchange unit are
connected by the connecting pipes to the first air-liquid heat
exchanger to form at least two circulation pipelines.
[0040] The control device is configured to acquire environment
information, where the environment information includes at least
one of the following temperatures: an outdoor temperature of the
equipment room and a temperature of the soil surrounding buried
pipes, and control the at least two circulation pipelines according
to a preset control policy and the acquired environment
information, to enable at least one of the circulation pipelines to
be in an open state (that is, control at least one of the at least
two circulation pipelines to be in an open state according to the
preset control policy and the acquired environment information). A
circulation fluid (specifically, a circulation liquid) is driven by
the fluid conveying device to flow in the open circulation pipeline
to complete the cooling.
[0041] It should be noted that to achieve that the control device
controls at least one of the at least two circulation pipelines to
be in an open state, in one implementation, at least one control
valve needs to be disposed on each circulation pipeline, and at
least one fluid conveying device needs to be disposed on each
circulation pipeline. It is understood that when a control valve is
disposed at the same pipe position of multiple circulation
pipelines, there is one control valve which is needed to be
disposed on (the connecting pipes of) the cooling system according
to the embodiment of the present invention; and when a fluid
conveying device is disposed at the same pipe position of multiple
circulation pipelines, there is one fluid conveying device which is
needed to be disposed on (the connecting pipes of) the cooling
system according to the embodiment of the present invention.
[0042] FIG. 4 is a schematic diagram of a cooling system according
to Embodiment 1 of the present invention. As shown in FIG. 4, the
cooling system is applied to an outdoor integrated equipment room,
and includes a buried heat exchange unit 301, a first air-liquid
heat exchanger 302, a second air-liquid heat exchanger 303, a
control device 304, a fluid conveying device 305, and connecting
pipes 307. The buried heat exchange unit 301 is buried underground,
the first air-liquid heat exchanger 302 is disposed in the
equipment room, and the second air-liquid heat exchanger 303 is
disposed outside the equipment room. The buried heat exchange unit
301 and the second air-liquid heat exchanger 303 are connected by
the connecting pipes 307 to the first air-liquid heat exchanger 302
to form two circulation pipelines. It should be noted that the
first air-liquid heat exchanger 302 and the second air-liquid heat
exchanger 303 are connected by the connecting pipes 307 to form a
first circulation pipeline, and the first air-liquid heat exchanger
302 and the buried heat exchange unit 301 are connected by the
connecting pipes 307 to form a second circulation pipeline.
Specifically, pipes in the buried heat exchange unit 301, coil
pipes in the first air-liquid heat exchanger 302, and the
connecting pipes 307 form a loop; and coil pipes in the second
air-liquid heat exchanger 303, the coil pipes in the first
air-liquid heat exchanger 302, and the connecting pipes 307 form
another loop.
[0043] The first air-liquid heat exchanger 302 is configured to
suck in hot air in the equipment room. The hot air exchanges heat
with the circulation fluid flowing in the coil pipes (that is, the
heat of the air in the equipment room is transferred to the
circulation fluid flowing in the coil pipes), the air with its heat
released is returned into the equipment room, and the circulation
fluid absorbing the heat (that is, the hot fluid) flows out of the
first air-liquid heat exchanger 302. Specifically, driven by the
fluid conveying device 305, the circulation fluid absorbing the
heat flows out of the first air-liquid heat exchanger 302.
[0044] When the circulation fluid flows out of the first air-liquid
heat exchanger 302, the control device 304 is configured to acquire
environment information, and to control the first circulation
pipeline and the second circulation pipeline, according to the
preset control policy and the acquired environment information, to
enable the first circulation pipeline and/or the second circulation
pipeline to be open (that is, to control the first circulation
pipeline and/or the second circulation pipeline to be in an open
state), where the environment information includes at least one of
the following temperatures: an outdoor temperature of the equipment
room and a temperature of the soil surrounding buried pipes. It is
understood that if the circulation pipelines are open in a default
state, the corresponding circulation pipelines must be controlled
to enter a closed state; and on the contrary, if the circulation
pipelines are closed in a default state, the corresponding
circulation pipelines must be controlled to enter the open state,
and the outgoing circulation fluid flows to the second air-liquid
heat exchanger 303 and/or the buried heat exchange unit 301
correspondingly through the open circulation pipeline.
[0045] When the circulation fluid flows into the second air-liquid
heat exchanger 303 through the open first circulation pipeline, the
second air-liquid heat exchanger 303 is configured to enable the
circulation fluid flowing in the coil pipes therein to exchange
heat with the air flowing outside the coil pipes, and the
circulation fluid with its temperature lowered i.e. cold fluid
circulates and flows into the first air-liquid heat exchanger 302
along the open first circulation pipeline. Specifically, driven by
the fluid conveying device 305, the circulation fluid with its
temperature lowered (i.e., cold fluid) circulates and flows into
the first air-liquid heat exchanger 302 along the open first
circulation pipeline.
[0046] When the circulation fluid flows into the buried heat
exchange unit 301 through the open second circulation pipeline, the
buried heat exchange unit 301 is configured to enable the
circulation fluid flowing in the pipes therein to exchange heat
with the soil, and the circulation fluid with its temperature
lowered (i.e., cold fluid) circulates and flows into the first
air-liquid heat exchanger 302 along the open second circulation
pipeline. Specifically, driven by the fluid conveying device 305,
the circulation fluid with its temperature lowered (i.e., cold
fluid) circulates and flows into the first air-liquid heat
exchanger 302 along the open second circulation pipeline. The
buried heat exchange unit 301, which may also be referred to as an
underground buried pipe heat exchanger, is composed of a series of
pipes buried in soil 408 (i.e., a group of buried pipe structures).
The pipes may be buried horizontally or vertically, and are
preferably buried vertically. A material of the buried pipes is
preferably polyethylene (PE). The depth and number of the buried
pipes are determined according to the actual application situation
including exchanged heat quantity and local climate condition.
[0047] As shown in FIG. 4, in one implementation, a control valve
3.1 is disposed on the first circulation pipeline (specifically,
the control valve 3.1 may be disposed on a liquid inlet pipe of the
second air-liquid heat exchanger 303), and a control valve 3.2 is
disposed on the second circulation pipeline (specifically, the
control valve 3.2 may be disposed on a liquid outlet pipe of the
buried heat exchange unit 301). The control device 304 is a first
control device, configured to control the opening of the control
valve 3.1 and/or the control valve 3.2 according to the preset
control policy and the acquired environment information.
Specifically, when the control valve 3.1 is opened, the cooling is
performed based on the first circulation pipeline; when the control
valve 3.2 is opened, the cooling is performed based on the second
circulation pipeline; and when the control valves 3.1 and 3.2 are
both opened, the cooling is performed based on the first
circulation pipeline and the second circulation pipeline at the
same time in parallel.
[0048] It should be noted that in the cooling system according to
Embodiment 1 of the present invention, the fluid conveying device
305 is disposed on the liquid inlet pipe of the first air-liquid
heat exchanger 302. It is understood that the fluid conveying
device 305 may also be disposed on the liquid outlet pipe of the
first air-liquid heat exchanger 302.
[0049] As can be seen from the above, the cooling system according
to Embodiment 1 of the present invention fully uses the underground
soil and the outside air to dissipate heat according to local
climate characteristics and soil temperature change characteristics
of the equipment room. When the circulation fluid flows to the
buried heat exchange unit 301, the heat is transferred to the soil;
and when the circulation fluid flows to the second air-liquid heat
exchanger 303, the heat is transferred to the outside air. Thus,
through the alternate or simultaneous cooling in the two modes, the
cooling system according to Embodiment 1 of the present invention
achieves better power-saving performance than conventional air
conditioning systems for the equipment room. In addition, the
problem of system instability caused by a high underground soil
temperature is prevented, where the high underground soil
temperature occurs because the underground soil receives the heat
for a long time. Therefore, the cooling (temperature control)
system can operate more stably.
[0050] In addition, in the embodiment of the present invention,
when the outside air is used for cooling, the outside air is not
directly introduced into the equipment room, so the cooling system
has low requirements for the air quality. Therefore, the
application scenarios are not limited.
[0051] FIG. 5 is a schematic diagram of a cooling system according
to Embodiment 2 of the present invention. Referring to FIG. 5, the
cooling system is applied to an outdoor integrated equipment room,
and includes a buried heat exchange unit 401, a first air-liquid
heat exchanger 402, a second air-liquid heat exchanger 403, a
control device 404, a fluid conveying device 405, and correcting
pipes 407. The buried heat exchange unit 401 is buried underground,
the first air-liquid heat exchanger 402 is disposed in the
equipment room, and the second air-liquid heat exchanger 403 is
disposed outside the equipment room. The second air-liquid heat
exchanger 403 and the first air-liquid heat exchanger 402 are
connected by the connecting pipes 407 to form a first circulation
pipeline, and the buried heat exchange unit 401 and the first
air-liquid heat exchanger 402 are connected by the connecting pipes
407 to form a second circulation pipeline.
[0052] As shown in FIG. 5, different from Embodiment 1, control
valves 4.1 and 4.2 are disposed on the first circulation pipeline
(which are respectively disposed on a liquid inlet pipe and a
liquid outlet pipe of the second air-liquid heat exchanger 403),
and control valves 4.3 and 4.4 are disposed on the second
circulation pipeline (which are respectively disposed on an inlet
pipe and an outlet pipe of the buried heat exchange unit 401).
[0053] The control device 404 is configured to acquire environment
information, where the environment information includes at least
one of the following temperatures: an outdoor temperature of the
equipment room and a temperature of the soil surrounding buried
pipes, and control the opening of the corresponding control valves
4.1, 4.2 and/or control valves 4.3, 4.4 according to a preset
control policy and the acquired environment information, to enable
the first circulation pipeline and/or the second circulation
pipeline to be in an open state. Specifically, when the control
valves 4.1 and 4.2 are opened, the first circulation pipeline which
is formed by coil pipes of the first air-liquid heat exchanger 402,
coil pipes of the second air-liquid heat exchanger 403, and a
corresponding portion of the connecting pipes 407 is in an open
state; and similarly, when the control valves 4.3 and 4.4 are
opened, the second circulation pipeline which is formed by the coil
pipes of the first air-liquid heat exchanger 402, buried pipes of
the buried heat exchange unit 401, and a corresponding portion of
the connecting pipes 407 is in an open state.
[0054] The control policy may be implemented in many ways. In one
implementation, the control policy is as follows.
[0055] According to a comparison result between an outdoor
temperature of the equipment room and a preset value, a flow
direction of a circulation fluid flowing out of the first
air-liquid heat exchanger 402 is controlled. The preset value, for
example, is approximate to the local annual mean temperature of the
equipment room, or a temperature value obtained by comprehensively
considering the environment information including the indoor
temperature and outdoor temperature of the equipment room and soil
situation, or a designed maximum working temperature of the first
air-liquid heat exchanger 402.
[0056] Specifically, when the outdoor temperature of the equipment
room is higher than the preset value, the control device 404 opens
the control valve 4.3 and the control valve 4.4 (when the default
state of the control valves 4.1, 4.2, 4.3, and 4.4 are closed)
and/or closes the control valve 4.2 and the control valve 4.1 (when
the default state of the control valves 4.1, 4.2, 4.3, and 4.4 are
open), and the circulation fluid 406 absorbing the heat and flowing
out of the first air-liquid heat exchanger 402 flows to the buried
heat exchange unit 401 along the open second circulation pipeline.
After transferring the heat to the soil 408 through the buried heat
exchange unit 401, the circulation fluid 406 has its temperature
lowered, and the circulation fluid 406 (i.e., cold fluid) flows
back to the first air-liquid heat exchanger 402 along the open
second circulation pipeline. Therefore, one circulation is
complete, and the heat in the equipment room is dissipated.
[0057] When the outdoor temperature of the equipment room is lower
than the preset value, the control device 404 opens the control
valve 4.1 and the control valve 4.2 and/or closes the control valve
4.3 and the control valve 4.4, and the circulation fluid 406
absorbing the heat and flowing out of the first air-liquid heat
exchanger 402 flows to the second air-liquid heat exchanger 403
along the first circulation pipeline (specifically, the pipe is in
an open state because the control valve 4.1 is opened). After
transferring the heat to the outside air through the second
air-liquid heat exchanger 403, the circulation fluid has its
temperature lowered, and the circulation fluid 406 (i.e., cold
fluid) flows back to the first air-liquid heat exchanger 402 along
the first circulation pipeline (specifically, the pipe is in an
open state because the control valve 4.2 is opened). Therefore, one
circulation is complete, and the heat in the equipment room is
dissipated.
[0058] It should be noted that the circulation fluid 406 is driven
by the fluid conveying device 405 to circulate and flow in the
connecting pipes 407, and the fluid conveying device 405 is
disposed on the liquid inlet pipe of the first air-liquid heat
exchanger 402. It is understood that the fluid conveying device 405
may also be disposed on the liquid outlet pipe of the first
air-liquid heat exchanger 402. In one implementation, the fluid
conveying device 405 is a circulation pump for driving a liquid to
flow.
[0059] As can be seen from the above, the cooling system according
to Embodiment 2 of the present invention fully uses the underground
soil and the outside air to dissipate heat according to local
climate characteristics and soil temperature change characteristics
of the equipment room. When the circulation fluid flows to the
buried heat exchange unit 401, the heat is transferred to the soil;
and when the circulation fluid flows to the second air-liquid heat
exchanger 403, the heat is transferred to the outside air. Thus,
through the alternate or simultaneous cooling in the two modes, the
cooling system according to Embodiment 2 of the present invention
achieves better power-saving performance than conventional air
conditioning systems for the equipment room. In addition, the
problem of system instability caused by a high underground soil
temperature is prevented, where the high underground soil
temperature occurs because the soil receives the heat for a long
time. Therefore, the cooling (temperature control) system can
operate more stably.
[0060] In addition, in the embodiment of the present invention,
when the outside air is used for cooling, the outside air is not
directly introduced into the equipment room, so the cooling system
has low requirements for the air quality. Therefore, the
application scenarios are not limited.
[0061] FIG. 6 is a schematic diagram of a cooling system applied to
an equipment room according to Embodiment 3 of the present
invention. Referring to FIG. 6, the cooling system is applied to an
equipment room 50, and at least one communication apparatus 506 is
disposed in the equipment room 50. The cooling system includes a
buried heat exchange unit 501, a first air-liquid heat exchanger
502, a second air-liquid heat exchanger 503, a control device 504,
a fluid conveying device 505, and connecting pipes 507. The first
air-liquid heat exchanger 502 is disposed in the equipment room 50,
the control device 504 and the fluid conveying device 505 are
preferably disposed in the equipment room 50, the second air-liquid
heat exchanger 503 is disposed outside the equipment room 50, and
the buried heat exchange unit 501 is buried underground.
[0062] The second air-liquid heat exchanger 503 and the first
air-liquid heat exchanger 502 are connected by the connecting pipes
507 to form a first circulation pipeline, and the buried heat
exchange unit 501 and the first air-liquid heat exchanger 502 are
connected by the connecting pipes 507 to form a second circulation
pipeline. Control valves 5071 and 5073 are disposed on the first
circulation pipeline, and control valves 5072 and 5074 are disposed
on the second circulation pipeline.
[0063] The first air-liquid heat exchanger 502 mainly includes a
coil pipe structure, an air inlet 5021, an air outlet 5022, and an
air conveying device 5023. The internal air conveying device 5023
sucks in hot air inside the equipment room 50 through the air inlet
5021. The hot air exchanges heat with the circulation fluid flowing
in the coil pipe structure. The hot air with its heat released
flows back into the equipment room 50 through the air outlet 5022
as cold air, and the circulation fluid flowing inside the coil pipe
structure is driven by the fluid conveying device 505 to flow out
of the first air-liquid heat exchanger 502 after absorbing the heat
of the hot air.
[0064] It should be noted that the first air-liquid heat exchanger
502 is preferably in a vertical structure. When the internal space
of the equipment room 50 is small, the first air-liquid heat
exchanger 502 may be in a horizontal structure and suspended on the
ceiling. The internal structure of the first air-liquid heat
exchanger 502 may vary according to actual situations, and the air
conveying device 5023 in the first air-liquid heat exchanger 502
may be an axial fan or a centrifugal fan, and is preferably a
centrifugal fan.
[0065] The control device 504 is configured to acquire environment
information, where the environment information includes at least
one of the following temperatures: an outdoor temperature of the
equipment room and a temperature of the soil surrounding buried
pipes, and control the opening of the first circulation pipeline
and/or the second circulation pipeline according to a preset policy
and the acquired environment information. The outgoing circulation
fluid flows to the second air-liquid heat exchanger 503 or the
buried heat exchange unit 501 through the open circulation
pipeline.
[0066] In one implementation, the control device 504 is
specifically configured to control the opening or closing of the
control valve 5071 and the control valve 5073 and/or the opening or
closing of the control valve 5072 and the control valve 5074. When
the control valve 5071 and the control valve 5073 are opened, the
first circulation pipeline is in an open state; and similarly, when
the control valve 5072 and the control valve 5074 are opened, the
second circulation pipeline is in an open state. The circulation
fluid flows to the second air-liquid heat exchanger 503 through the
first circulation pipeline, and flows back to the first air-liquid
heat exchanger 502; and/or the circulation fluid flows to the
buried heat exchange unit 501 through the second circulation
pipeline, and flows back to the first air-liquid heat exchanger
502.
[0067] According to a specific control policy, when the outdoor
temperature of the equipment room is lower than a set value (the
set value may be determined according to local climate conditions
and local annual mean temperature), the control device 504 controls
the opening of the control valves 5071 and 5073, and the
circulation fluid (hot fluid) enters the second air-liquid heat
exchanger 503 outside the equipment room 50 along the first
circulation pipeline.
[0068] The second air-liquid heat exchanger 503 mainly includes a
coil pipe structure 5031 and an air conveying device 5032. When the
circulation fluid (i.e., hot fluid) flows in the coil pipe
structure 5031, the air conveying device 5032 drives the cold air
in the environment to flow along an outer wall of the coil pipe
structure 5031, so as to cool the circulation fluid (i.e., hot
fluid) flowing in the coil pipe structure 5031. After the
circulation fluid (i.e., hot fluid) has its temperature lowered,
the circulation fluid circulates and flows into the first
air-liquid heat exchanger 502 along the first circulation pipeline
as a cold fluid. It should be noted that the air conveying device
5032 in the second air-liquid heat exchanger 503 is preferably an
axial fan.
[0069] According to a specific control policy, when the outdoor
temperature of the equipment room is higher than the set value, the
control device 504 controls the opening of the control valves 5072
and 5074, and the circulation fluid (hot fluid) flowing out of the
first air-liquid heat exchanger 503 enters the buried heat exchange
unit 501 along the second circulation pipeline.
[0070] The buried heat exchange unit 501 mainly includes a group of
underground buried pipes. The circulation fluid (hot fluid)
transfers its heat to the soil when flowing in the underground
buried pipes, has its temperature lowered, and enters the first
air-liquid heat exchanger 502 in the equipment room 50 along the
second circulation pipeline as a cold fluid.
[0071] As can be seen from the above, the cooling system according
to Embodiment 3 of the present invention fully uses the underground
soil and the outside air to dissipate heat according to local
climate characteristics and soil temperature change characteristics
of the equipment room. When the circulation fluid flows to the
buried heat exchange unit 501, the heat is transferred to the soil;
and when the circulation fluid flows to the second air-liquid heat
exchanger 503, the heat is transferred to the outside air. Thus,
through the alternate cooling in the two modes, the cooling system
according to Embodiment 3 of the present invention achieves better
power-saving performance than conventional air conditioning systems
for the equipment room. In addition, the problem of system
instability caused by a high underground soil temperature is
prevented, where the high underground soil temperature occurs
because the soil receives the heat for a long time. Therefore, the
cooling (temperature control) system can operate more stably.
[0072] In addition, in the embodiment of the present invention,
when the outside air is used for cooling, the outside air is not
directly introduced into the equipment room, so the cooling system
has low requirements for the air quality. Therefore, the
application scenarios are not limited.
[0073] FIG. 7 is a schematic diagram of a cooling system according
to Embodiment 4 of the present invention. The cooling system is
applied to an outdoor integrated equipment room, and includes a
buried heat exchange unit 601, a first air-liquid heat exchanger
602, a second air-liquid heat exchanger 603, a control device 604,
a fluid conveying device 605, and connecting pipes 607. The buried
heat exchange unit 601 is buried underground, the first air-liquid
heat exchanger 602 is disposed in the equipment room, and the
second air-liquid heat exchanger 603 is disposed outside the
equipment room. The second air-liquid heat exchanger 603 and the
first air-liquid heat exchanger 602 are connected by the connecting
pipes 607 to form a first circulation pipeline, and the buried heat
exchange unit 601 and the first air-liquid heat exchanger 602 are
connected by the connecting pipes 607 to form a second circulation
pipeline.
[0074] As shown in FIG. 7, different from Embodiment 2, three-way
valves 6.1 and 6.2 are disposed on an intersection pipe of the
first circulation pipeline and the second circulation pipeline. The
three-way valves 6.1 and 6.2 have the same function as the control
valves 4.1, 4.2, 4.3, and 4.4 in Embodiment 2. The function of the
three-way valves is to close the other pipe when opening one pipe,
or to open both pipes at the same time.
[0075] The control device 604 is configured to acquire environment
information, where the environment information includes at least
one of the following temperatures: an outdoor temperature of the
equipment room and a temperature of the soil surrounding buried
pipes, and control the opening and/or the closing of the three-way
valve 6.1 and the three-way valve 6.2 according to a preset control
policy and the acquired environment information, to enable the
first circulation pipeline and/or the second circulation pipeline
to be in an open state, and the circulation fluid flows in the open
circulation pipeline to complete cooling.
[0076] It should be noted that the circulation fluid is driven by
the fluid conveying device 605 to circulate and flow in the
connecting pipes, and the fluid conveying device 605 is disposed on
a liquid inlet pipe of the first air-liquid heat exchanger 602. It
is understood that the fluid conveying device 605 may also be
disposed on a liquid outlet pipe of the first air-liquid heat
exchanger 602.
[0077] As can be seen from the above, the cooling system according
to Embodiment 4 of the present invention performs the cooling by
using the circulation fluid flowing in the first circulation
pipeline and/or the second circulation pipeline. Thus, through the
alternate or simultaneous cooling in the two modes, the cooling
system according to Embodiment 4 of the present invention achieves
better power-saving performance than conventional air conditioning
systems for the equipment room. In addition, the problem of system
instability caused by a high underground soil temperature is
prevented, where the high underground soil temperature occurs
because the soil receives the heat for a long time. Therefore, the
cooling (temperature control) system can operate more stably.
[0078] In addition, in the embodiment of the present invention,
when the outside air is used for cooling, the outside air is not
directly introduced into the equipment room, so the cooling system
has low requirements for the air quality. Therefore, the
application scenarios are not limited.
[0079] FIG. 8 is a schematic diagram of a cooling system according
to Embodiment 5 of the present invention. The cooling system is
applied to an outdoor integrated equipment room, and includes a
buried heat exchange unit 701, a first air-liquid heat exchanger
702, a second air-liquid heat exchanger 703, a control device 704,
a fluid conveying device 705, and connecting pipes 707. The buried
heat exchange unit 701 is buried underground, the first air-liquid
heat exchanger 702 is disposed in the equipment room, and the
second air-liquid heat exchanger 703 is disposed outside the
equipment room. The second air-liquid heat exchanger 703 and the
first air-liquid heat exchanger 702 are connected by the connecting
pipes 707 to form a first circulation pipeline, the buried heat
exchange unit 701 and the first air-liquid heat exchanger 702 are
connected by the connecting pipes 707 to form a second circulation
pipeline, and the first air-liquid heat exchanger 702, the second
air-liquid heat exchanger 703, and the buried heat exchange unit
701 are connected by the connecting pipes 707 to form a third
circulation pipeline.
[0080] As shown in FIG. 8, three-way valves 7.1 and 7.2 are
disposed on an intersection pipe of the first circulation pipeline
and the second circulation pipeline, and the position of the
three-way valve 7.2 is different from the three-way valve 6.2 in
Embodiment 4.
[0081] The control device 704 is configured to acquire environment
information, where the environment information includes at least
one of the following temperatures: an outdoor temperature of the
equipment room and a temperature of the soil surrounding buried
pipes, and control the opening and/or the closing of the valves in
the corresponding three-way valves 7.1 and 7.2, to enable at least
one of the first circulation pipeline, the second circulation
pipeline, and the third circulation pipeline to be in an open state
(for example, only the first circulation pipeline is in an open
state, only the second circulation pipeline is in an open state,
two of the three circulation pipelines are in an open state, or all
the three circulation pipelines are in an open state). The
circulation fluid flows in the open circulation pipeline to
complete the cooling. Specifically, when the first circulation
pipeline is in an open state, the circulation fluid (i.e., hot
fluid) flowing out of the first air-liquid heat exchanger 702 flows
into the second air-liquid heat exchanger 703 through the
horizontal connecting pipes on which the three-way valve 7.1 is
arranged to perform heat exchange, and the circulation fluid (i.e.,
cold fluid) flowing out of the second air-liquid heat exchanger 703
flows back to the first air-liquid heat exchanger 702 through the
horizontal connecting pipes on which the three-way valve 7.2 is
arranged to complete the cooling.
[0082] When the second circulation pipeline is in an open state,
the circulation fluid (i.e., hot fluid) flowing out of the first
air-liquid heat exchanger 702 flows into the buried heat exchange
unit 701 through the vertical connecting pipes on which the
three-way valves 7.1 and 7.2 are arranged to perform heat exchange,
and the circulation fluid (i.e., cold fluid) flowing out of the
buried heat exchange unit 701 flows back to the first air-liquid
heat exchanger 702 to complete the cooling.
[0083] When the third circulation pipeline is in an open state, the
circulation fluid (i.e., hot fluid) flowing out of the first
air-liquid heat exchanger 702 flows into the second air-liquid heat
exchanger 703 through the horizontal connecting pipes on which the
three-way valve 7.1 is arranged to perform heat exchange, the
circulation fluid (i.e., cold fluid) flowing out of the second
air-liquid heat exchanger 703 flows into the buried heat exchange
unit 701 through the vertical connecting pipes on which the
three-way valve 7.2 is arranged to perform heat exchange, and the
circulation fluid (i.e., cold fluid) flowing out of the buried heat
exchange unit 701 flows back to the first air-liquid heat exchanger
702 to complete the cooling.
[0084] It should be noted that the circulation fluid is driven by
the fluid conveying device 705 to circulate and flow in the
connecting pipes, and the fluid conveying device 705 is disposed on
a liquid inlet pipe of the first air-liquid heat exchanger 702. It
is understood that the fluid conveying device 705 may also be
disposed on a liquid outlet pipe of the first air-liquid heat
exchanger 702.
[0085] As can be seen from the above, in the cooling system
according to Embodiment 5 of the present invention, the circulation
fluid flows in at least one of the first circulation pipeline, the
second circulation pipeline, and the third circulation pipeline to
complete the cooling. Thus, the cooling system according to
Embodiment 5 of the present invention achieves better power-saving
performance than conventional air conditioning systems for the
equipment room. In addition, the problem of system instability
caused by a high underground soil temperature is prevented, where
the high underground soil temperature occurs because the soil
receives the heat for a long time. Therefore, the cooling
(temperature control) system can operate more stably.
[0086] In addition, in the embodiment of the present invention,
when the outside air is used for cooling, the outside air is not
directly introduced into the equipment room, so the cooling system
has low requirements for the air quality. Therefore, the
application scenarios are not limited.
[0087] FIG. 9 is a schematic diagram of a cooling system according
to Embodiment 6 of the present invention. The cooling system is
applied to an outdoor integrated equipment room, and includes a
buried heat exchange unit 901, a first air-liquid heat exchanger
902, a second air-liquid heat exchanger 903, a control device 904,
a fluid conveying device 905, and connecting pipes 907. The buried
heat exchange unit 901 is buried underground, the first air-liquid
heat exchanger 902 is disposed in the equipment room, and the
second air-liquid heat exchanger 903 is disposed outside the
equipment room. The second air-liquid heat exchanger 903 and the
first air-liquid heat exchanger 902 are connected by the connecting
pipes 907 to form a first circulation pipeline, and the buried heat
exchange unit 901 and the first air-liquid heat exchanger 902 are
connected by the connecting pipes 907 to form a second circulation
pipeline.
[0088] As shown in FIG. 9, a three-way valve 9.1 is disposed on an
intersection pipe of the first circulation pipeline and the second
circulation pipeline.
[0089] The control device 904 is configured to acquire environment
information, where the environment information includes at least
one of the following temperatures: an outdoor temperature of the
equipment room and a temperature of the soil surrounding buried
pipes, and control the opening and/or the closing of the
corresponding valves of the three-way valve 9.1, to enable the
first circulation pipeline and/or the second circulation pipeline
to be in an open state. The circulation fluid flows in the open
circulation pipeline to complete the cooling.
[0090] It should be noted that the circulation fluid is driven by
the fluid conveying device 905 to circulate and flow in the
connecting pipes, and the fluid conveying device 905 is disposed on
a liquid inlet pipe of the first air-liquid heat exchanger 902. It
is understood that the fluid conveying device 905 may also be
disposed on a liquid outlet pipe of the first air-liquid heat
exchanger 902.
[0091] As can be seen from the above, in the cooling system
according to Embodiment 6 of the present invention, the circulation
fluid flows in the first circulation pipeline and/or the second
circulation pipeline to complete the cooling. Thus, the cooling
system according to Embodiment 6 of the present invention achieves
better power-saving performance than conventional air conditioning
systems for the equipment room. In addition, the problem of system
instability caused by a high underground soil temperature is
prevented, where the high underground soil temperature occurs
because the soil receives the heat for a long time. Therefore, the
cooling (temperature control) system can operate more stably.
[0092] In addition, in the embodiment of the present invention,
when the outside air is used for cooling, the outside air is not
directly introduced into the equipment room, so the cooling system
has low requirements for the air quality. Therefore, the
application scenarios are not limited.
[0093] FIG. 10 is a schematic diagram of a cooling system according
to Embodiment 7 of the present invention. The cooling system is
applied to an outdoor integrated equipment room, and includes a
buried heat exchange unit 801, a first air-liquid heat exchanger
802, a second air-liquid heat exchanger 803, a control device 804,
fluid conveying devices 8051 and 8052, and connecting pipes 807.
The buried heat exchange unit 801 is buried underground, the first
air-liquid heat exchanger 802 is disposed in the equipment room,
and the second air-liquid heat exchanger 803 is disposed outside
the equipment room. The second air-liquid heat exchanger 803 and
the first air-liquid heat exchanger 802 are connected by the
connecting pipes 807 to form a first circulation pipeline, and the
buried heat exchange unit 801 and the first air-liquid heat
exchanger 802 are connected by the connecting pipes 807 to form a
second circulation pipeline.
[0094] As shown in FIG. 10, a three-way valve 8.1 is disposed on an
intersection pipe of the first circulation pipeline and the second
circulation pipeline. Different from Embodiment 6, the fluid
conveying devices are controlled in this embodiment, that is, the
fluid conveying device 8051 is disposed on the first circulation
pipeline, and the fluid conveying device 8052 is disposed on the
second circulation pipeline (the fluid conveying devices are not
disposed at the same pipe position of the two circulation
pipelines, for example, the liquid outlet pipe and liquid inlet
pipe of the first air-liquid heat exchanger).
[0095] The control device 804 is configured to acquire environment
information, where the environment information includes at least
one of the following temperatures: an outdoor temperature of the
equipment room and a temperature of the soil surrounding buried
pipes, and control the opening and/or the closing of the
corresponding valves of the three-way valve 8.1 and control the
fluid conveying device 8051 and/or the fluid conveying device 8052
according to a preset control policy and the acquired environment
information, to enable the first circulation pipeline and/or the
second circulation pipeline to be in an open state. The circulation
fluid flows in the open circulation pipeline to complete the
cooling. For example, when the control device 804 controls the
opening of all valves of the three-way valve 8.1 and controls the
starting of the fluid conveying device 8051 and the fluid conveying
device 8052, the first circulation pipeline and the second
circulation pipeline perform the cooling at the same time in
parallel, that is, the circulation fluid flows in the open first
circulation pipeline and the open second circulation pipeline to
complete the cooling.
[0096] When the control device 804 controls the opening of the
horizontal valves of the three-way valve 8.1 and controls the
starting of the fluid conveying device 8051, the circulation fluid
is driven by the fluid conveying device 8051 to flow in the open
first circulation pipeline to complete the cooling.
[0097] When the control device 804 controls the opening of the
vertical valves of the three-way valve 8.1 and controls the
starting of the fluid conveying device 8052, the circulation fluid
is driven by the fluid conveying device 8052 to flow in the open
second circulation pipeline to complete the cooling.
[0098] As can be seen from the above, in the cooling system
according to Embodiment 7 of the present invention, the circulation
fluid flows in the first circulation pipeline and/or the second
circulation pipeline to perform the cooling. Thus, the cooling
system according to Embodiment 7 of the present invention achieves
better power-saving performance than conventional air conditioning
systems for the equipment room. In addition, the problem of system
instability caused by a high underground soil temperature is
prevented, where the high underground soil temperature occurs
because the soil receives the heat for a long time. Therefore, the
cooling (temperature control) system can operate more stably.
[0099] In addition, in the embodiment of the present invention,
when the outside air is used for cooling, the outside air is not
directly introduced into the equipment room, so the cooling system
has low requirements for the air quality. Therefore, the
application scenarios are not limited.
[0100] To achieve further objectives of saving power and reducing
noise, for the first air-liquid heat exchanger and the second
air-liquid heat exchanger according to the first to seventh
embodiments, the control device can further regulate the speed of
fans of the first air-liquid heat exchanger and the second
air-liquid heat exchanger. For example, the first air-liquid heat
exchanger has two types, one is the first air-liquid heat exchanger
without fan speed regulation, and the other is the first air-liquid
heat exchanger with fan speed regulation; and similarly, the second
air-liquid heat exchanger also has two types, one is the second
air-liquid heat exchanger without fan speed regulation, and the
other is the second air-liquid heat exchanger with fan speed
regulation.
[0101] Correspondingly, referring to FIG. 5, for example, the first
circulation pipeline has three combinations: 1. the first
circulation pipeline formed by the connecting pipes between the
second air-liquid heat exchanger with fan speed regulation and the
first air-liquid heat exchanger without fan speed regulation; 2.
the first circulation pipeline formed by the connecting pipes
between the second air-liquid heat exchanger without fan speed
regulation and the first air-liquid heat exchanger with fan speed
regulation; and 3. the first circulation pipeline formed by the
connecting pipes between the second air-liquid heat exchanger
without fan speed regulation and the first air-liquid heat
exchanger without fan speed regulation.
[0102] The second circulation pipeline has two combinations: 1. the
second circulation pipeline formed by the connecting pipes between
the buried heat exchange unit and the first air-liquid heat
exchanger with fan speed regulation; and 2. the second circulation
pipeline formed by the connecting pipes between the buried heat
exchange unit and the first air-liquid heat exchanger without fan
speed regulation.
[0103] Many fan speed regulation policies may be adopted, one of
which is described in the following.
[0104] The fan speed regulation policy of the second air-liquid
heat exchanger is as follows.
[0105] A temperature of a circulation fluid outlet of the second
air-liquid heat exchanger remains unchanged, and different outdoor
temperatures (for example, air inlet temperatures) are
corresponding to different fan speeds. As shown in FIG. 16, the
full speed of the fan is corresponding to the maximum allowed
outdoor temperature Tfmax, and when the cooling load is unchanged,
Tfmax=Tf (where Tf is the designed maximum working temperature of
the second air-liquid heat exchanger). The lowest fan speed is
corresponding to a temperature Tfmin. When the outdoor temperature
equals Tf, the fan rotates at full speed; when the outdoor
temperature is lower than or equal to the lowest temperature Tfmin,
the fan rotates at the lowest speed; and when the outdoor
temperature is lower than a limit temperature Tflimit, the fan may
even be stopped.
[0106] The fan speed regulation policy of the first air-liquid heat
exchanger is as follows.
[0107] Preferably, the speed is regulated according to the indoor
temperature or other parameters. The indoor temperature is one of a
temperature at an outlet of the indoor fan coil pipes, an air
temperature at an inlet of the indoor communication apparatus, and
an indoor mean temperature. Next, the "air temperature at the inlet
of the indoor communication apparatus" is taken as an example in
the following description.
[0108] As shown in FIG. 17, the full speed of the fan is
corresponding to the indoor maximum allowed temperature Tsmax, and
the lowest fan speed is corresponding to a temperature Tsmin.
[0109] When the air temperature at the inlet of the communication
apparatus equals Tsmax, the fan rotates at full speed.
[0110] When the air temperature at the inlet of the communication
apparatus is lower than or equal to Tsmin, the fan rotates at the
lowest speed.
[0111] When the air temperature at the inlet of the communication
apparatus is between Tsmax and Tsmin, the fan speed is regulated
according to a set fan speed regulation curve.
[0112] When the air temperature at the inlet of the communication
apparatus is lower than a limit temperature Tslimit, the fan may be
stopped.
[0113] The implementations of the control device are described in
the following.
[0114] In one implementation, at least one control valve is
disposed on each circulation pipeline, and at least one fluid
conveying device is disposed on each of the circulation pipelines.
When there is a same fluid conveying device disposed on each of the
circulation pipelines, the control device is a first valve control
device, configured to control the opening or the closing of the
corresponding control valve according to the preset control policy
and the acquired environment information, to enable at least one
circulation pipeline to be in an open state. The circulation fluid
is driven by the fluid conveying device to flow in the open
circulation pipeline to complete the cooling.
[0115] In another implementation, at least one control valve is
disposed on each of the circulation pipelines, and at least one
fluid conveying device is disposed on each of the circulation
pipelines. When there is not a same fluid conveying device disposed
on each of the circulation pipelines, the control device is a
second valve control device, configured to control the opening or
the closing of the corresponding control valve to enable at least
one circulation pipeline to be in an open state, and to control the
corresponding fluid conveying device to drive the circulation fluid
to flow in the open circulation pipeline according to the preset
control policy and the acquired environment information. The
circulation fluid flows in the open circulation pipeline to
complete the cooling.
[0116] In another implementation, the second air-liquid heat
exchanger and the first air-liquid heat exchanger are connected by
the connecting pipes to form the first circulation pipeline, and
the buried heat exchange unit and the first air-liquid heat
exchanger are connected by the connecting pipes to form the second
circulation pipeline.
[0117] A first control valve and a second control valve are
disposed on the first circulation pipeline, and a third control
valve and a fourth control valve are disposed on the second
circulation pipeline. The control device is a third valve control
device, configured to control the opening of the first control
valve and the second control valve and/or the third control valve
and the fourth control valve according to the preset control policy
and the acquired environment information. The circulation fluid
flows in the first circulation pipeline and/or the second
circulation pipeline on which the control valves are opened to
complete the cooling.
[0118] Specifically, in one implementation, the control device is
further configured to perform fan speed regulation control on the
fan of the second air-liquid heat exchanger according to the
acquired outdoor temperature and preset association information
between the outdoor temperature information and the fan speed,
and/or perform fan speed regulation control on the fan of the
second air-liquid heat exchanger according to the acquired indoor
temperature and preset association information between the indoor
temperature information and the fan speed.
[0119] FIG. 11 is an internal structural view of a control device
of a cooling system according to an embodiment of the present
invention. As shown in FIG. 11, the control device includes a
control unit 1000 and an environment information acquiring unit
2000.
[0120] The environment information acquiring unit 2000 is
configured to acquire environment information, where the
environment information includes at least one of the following
temperatures: an outdoor temperature of the equipment room and a
temperature of the soil surrounding buried pipes.
[0121] The control unit 1000 is configured to control the opening
of at least one of the corresponding circulation pipelines
according to the preset control policy and the environment
information that is acquired by the environment information
acquiring unit 2000. That is, the control unit 1000 is configured
to control at least one of the at least two circulation pipelines
to be in an open state, where the circulation fluid is driven by
the fluid conveying device to flow in the open circulation pipeline
to complete the cooling.
[0122] To enable the control unit 1000 to control at least one
circulation pipeline of the corresponding circulation pipelines to
be in an open state, in one implementation, at least one control
valve is disposed on each circulation pipeline, and at least one
fluid conveying device is disposed on each circulation
pipeline.
[0123] When there is a same fluid conveying device disposed on each
of the circulation pipelines, the control unit 1000 is a first
valve control unit, configured to control the opening or the
closing of the corresponding control valves according to the preset
control policy and the environment information that is acquired by
the environment information acquiring unit 2000, to enable at least
one circulation pipeline to be in an open state. The circulation
fluid is driven by the fluid conveying device to flow in the open
circulation pipeline to complete the cooling.
[0124] When there is not a same fluid conveying device disposed on
each of the circulation pipelines, the control unit 1000 is a
second valve control unit. According to the preset control policy
and the environment information that is acquired by the environment
information acquiring unit 2000, the control unit 1000 is
configured to control the opening or the closing of the
corresponding control valves to enable at least one circulation
pipeline to be in an open state, and control the corresponding
fluid conveying device to drive the circulation fluid to flow in
the corresponding open circulation pipeline. The circulation fluid
flows in the open circulation pipeline to complete the cooling.
[0125] The environment information acquiring unit 2000 is further
configured to acquire the indoor temperature of the equipment
room.
[0126] Correspondingly, the control unit 1000 is further configured
to perform fan speed regulation control on the fan of the second
air-liquid heat exchanger according to the acquired outdoor
temperature and the preset association information between the
outdoor temperature information and the fan speed of the second
air-liquid heat exchanger, and/or perform fan speed regulation
control on the fan of the first air-liquid heat exchanger according
to the acquired indoor temperature and the preset association
information between the indoor temperature information and the fan
speed of the first air-liquid heat exchanger.
[0127] Next, a control method according to the embodiments of the
present invention will be described in detail in the following.
FIG. 12 is a flow chart of a control method according to an
embodiment of the present invention. The method is applicable to a
cooling system including a buried heat exchange unit, a first
air-liquid heat exchanger, a second air-liquid heat exchanger, a
control device, a fluid conveying device, and connecting pipes. The
cooling system is applied to an equipment room. The second
air-liquid heat exchanger and the buried heat exchange unit are
connected by the connecting pipes to the first air-liquid heat
exchanger to form at least two circulation pipelines. The control
method includes the following steps.
[0128] In step 1010, environment information is acquired, where the
environment information includes at least one of the following
temperatures: an outdoor temperature of the equipment room and a
temperature of the soil surrounding buried pipes.
[0129] In step 1020, according to a preset control policy and the
acquired environment information, the opening and/or the closing of
the corresponding circulation pipeline (s) is controlled, to enable
at least one of the at least two circulation pipelines to be in an
open state (that is, at least one of the at least two circulation
pipelines is controlled to be in an open state), where a
circulation fluid flows in the open circulation pipeline to
complete cooling.
[0130] When the second air-liquid heat exchanger and the first
air-liquid heat exchanger are connected by the connecting pipes to
form the first circulation pipeline, and the buried heat exchange
unit and the first air-liquid heat exchanger are connected by the
connecting pipes to form the second circulation pipeline, step 1020
is specifically as follows: control the opening of the first
circulation pipeline and/or the second circulation pipeline
according to the preset control policy and the acquired environment
information. The circulation fluid flowing out of the first
air-liquid heat exchanger flows into the corresponding second
air-liquid heat exchanger through the first circulation pipeline to
perform the cooling, and circulates and flows back to the first
air-liquid heat exchanger through the first circulation pipeline;
and/or the circulation fluid flowing out of the first air-liquid
heat exchanger flows into the corresponding buried heat exchange
unit through the second circulation pipeline to perform the
cooling, and flows back to the first air-liquid heat exchanger
through the second circulation pipeline.
[0131] Referring to FIG. 5, the circulation fluid flowing out of
the first air-liquid heat exchanger flows into the corresponding
second air-liquid heat exchanger through the first circulation
pipeline to perform the cooling, and circulates and flows back to
the first air-liquid heat exchanger through the first circulation
pipeline; and/or the circulation fluid flowing out of the first
air-liquid heat exchanger flows into the corresponding buried heat
exchange unit through the second circulation pipeline to perform
the cooling, and flows back to the first air-liquid heat exchanger
through the second circulation pipeline.
[0132] To control at least one of the at least two circulation
pipelines to be in an open state, in one implementation, at least
one control valve is disposed on each of the circulation pipelines,
and at least one fluid conveying device is disposed on each of the
circulation pipelines.
[0133] When the control valves are disposed on the circulation
pipelines and the circulation pipelines share one fluid conveying
device, step 1020 is specifically as follows: control the opening
or the closing of the corresponding control valves according to the
preset control policy and the acquired environment information, to
enable at least one circulation pipeline to be in an open state.
The circulation fluid is driven by the fluid conveying device to
flow in the open circulation pipeline to complete the cooling.
[0134] When the control valves are disposed on the circulation
pipelines and there is not a shared fluid conveying device disposed
on each of the circulation pipelines, step 1020 is specifically as
follows: according to the preset control policy and the acquired
environment information, control the opening or the closing of the
corresponding control valves to enable at least one circulation
pipeline to be in an open state and control the corresponding fluid
conveying device to drive the circulation fluid to flow in the open
circulation pipeline. The circulation fluid flows in the open
circulation pipeline to complete the cooling.
[0135] In one implementation, the control policy involved in the
control method according to the embodiment of the present invention
may be as follows.
[0136] For ease of description, the control policy is illustrated
with reference to FIG. 5. When the outdoor temperature Tl of the
equipment room is equal to or lower than a designed maximum working
temperature Tf of the second air-liquid heat exchanger
(specifically, the current working temperature of the second
air-liquid heat exchanger is lower than or equal to the designed
maximum working temperature Tf of the second air-liquid heat
exchanger), the first circulation pipeline is opened, the
circulation fluid flowing out of the first air-liquid heat
exchanger enters the second air-liquid heat exchanger, and the
system uses the first circulation pipeline to perform the cooling.
In one implementation, the designed maximum working temperature Tf
of the second air-liquid heat exchanger is calculated according to
the cooling load inside the equipment room and parameters of the
air-liquid heat exchanger.
[0137] When the outdoor temperature T1 of the equipment room is
higher than the designed maximum working temperature Tf of the
second air-liquid heat exchanger, the first circulation pipeline is
closed, the second circulation pipeline is opened, and the
circulation fluid flowing out of the first air-liquid heat
exchanger enters the buried heat exchange unit.
[0138] When the two circulation pipelines cannot satisfy the
cooling requirements, that is, when the indoor temperature T2 of
the equipment room is higher than the indoor maximum allowed
temperature of the equipment room (for example, the maximum allowed
inlet temperature of the indoor communication apparatus in the
equipment room), and the outdoor temperature T1 of the equipment
room is higher than the designed maximum working temperature Tf of
the second air-liquid heat exchanger, the first circulation
pipeline and the second circulation pipeline are both opened to
perform the cooling. It is understood that the control policy is
applicable to FIGS. 4 to 7, FIG. 9, and FIG. 10.
[0139] FIG. 13 is a detailed flow chart of a control method
according to Embodiment 1 of the present invention. Referring to
FIG. 13, the method is applicable to a cooling system including a
buried heat exchange unit, a first air-liquid heat exchanger, a
second air-liquid heat exchanger, a control device, a fluid
conveying device, and connecting pipes. For ease of description,
the control method is illustrated with reference to FIG. 5. After
the cooling system starts to operate, the method includes the
following steps.
[0140] In step 1011, an outdoor temperature T1 of the equipment
room and an indoor temperature T2 of the equipment room are
acquired.
[0141] Specifically, the outdoor temperature T1 and the indoor
temperature T2 of the equipment room are acquired by using a
temperature sensor.
[0142] In step 1012, according to the control policy, the outdoor
temperature T1 is compared with the designed maximum working
temperature Tf of the second air-liquid heat exchanger, and when
T1>Tf, step 1014 is performed; otherwise, step 1013 is
performed.
[0143] In step 1013, according to the control policy, the indoor
temperature T2 of the equipment room is compared with the indoor
maximum allowed temperature Ts of the equipment room (for example,
the maximum allowed inlet temperature of the indoor communication
apparatus of the equipment room), and when T2>Ts, step 1016 is
performed; otherwise, step 1015 is performed.
[0144] In step 1014, control the opening of the second circulation
pipeline, and the second circulation pipeline operates.
[0145] Specifically, control the opening of the second circulation
pipeline, and the circulation fluid is driven by the fluid
conveying device to flow in the open second circulation pipeline to
complete the cooling.
[0146] In step 1015, control the opening of the first circulation
pipeline, and the first circulation pipeline operates.
[0147] Specifically, control the opening of the first circulation
pipeline, and the circulation fluid is driven by the fluid
conveying device to flow in the open first circulation pipeline to
complete the cooling.
[0148] In step 1016, control the opening of the first circulation
pipeline and the second circulation pipeline, and the first
circulation pipeline and second circulation pipeline operate at the
same time.
[0149] Specifically, control the opening of the first circulation
pipeline and the second circulation pipeline at the same time, and
the circulation fluid is driven by the fluid conveying device to
flow in the open first circulation pipeline and the open second
circulation pipeline to complete the cooling.
[0150] As can be seen from the above, in the control method
according to the embodiment of the present invention, the
circulation fluid flows in the first circulation pipeline and/or
the second circulation pipeline to perform the cooling. Thus, the
present invention achieves better power-saving performance than
conventional air conditioning systems for the equipment room. In
addition, the problem of system instability caused by a high
underground soil temperature is prevented, where the high
underground soil temperature occurs because the soil receives the
heat for a long time. Therefore, the cooling (temperature control)
system can operate more stably.
[0151] In addition, in the embodiment of the present invention,
when the outside air is used for cooling, the outside air is not
directly introduced into the equipment room, so the cooling system
has low requirements for the air quality. Therefore, the
application scenarios are not limited.
[0152] In another implementation, the control policy involved in
the control method according to the embodiment of the present
invention may also be as follows. An outdoor temperature T1, a
temperature T3 of the soil surrounding the underground buried
pipes, a designed maximum working temperature Tf of the second
air-liquid heat exchanger, and a designed maximum temperature Tm of
the soil surrounding the underground buried pipes are discussed in
the following.
[0153] For ease of description, the control method is described
with reference to FIG. 5. When the cooling system starts to
operate, the second circulation pipeline is opened, so that the
circulation fluid flowing out of the first air-liquid heat
exchanger enters the buried heat exchange unit, and transfers heat
to the underground soil. When the temperature T3 of the soil
surrounding the underground buried pipes gradually rises to Tm, T1
is compared with Tf. When T1 is lower than or equal to Tf, the
first circulation pipeline is opened, and the second circulation
pipeline is closed; and when T1 is higher than Tf, the first
circulation pipeline and the second circulation pipeline are opened
at the same time, so that the two circulation pipelines share a
certain part of the heat load. The control policy is applicable to
FIGS. 4 to 7, FIG. 9, and FIG. 10.
[0154] That is, when the temperature T3 of the soil surrounding the
underground buried pipes is lower than the designed maximum
temperature Tm of the soil surrounding the underground buried
pipes, control the opening of the second circulation pipeline, and
the circulation fluid is driven by the fluid conveying device to
flow in the open second circulation pipeline to complete the
cooling.
[0155] When the temperature T3 of the soil surrounding the
underground buried pipes is higher than or equal to the designed
maximum temperature Tm of the soil surrounding the underground
buried pipes, and T1 is lower than or equal to the designed maximum
working temperature Tf of the second air-liquid heat exchanger,
control the opening of the first circulation pipeline, and the
circulation fluid is driven by the fluid conveying device to flow
in the open first circulation pipeline to complete the cooling.
[0156] When the temperature T3 of the soil surrounding the
underground buried pipes is higher than or equal to the designed
maximum temperature Tm of the soil surrounding the underground
buried pipes, and T1 is higher than the designed maximum working
temperature Tf of the second air-liquid heat exchanger, control the
opening of the first circulation pipeline and the second
circulation pipeline. The circulation fluid is driven by the fluid
conveying device to flow in the open first circulation pipeline and
second circulation pipeline to complete the cooling.
[0157] FIG. 14 is a detailed flow chart of a control method
according to Embodiment 2 of the present invention. The method is
applicable to a cooling system including a buried heat exchange
unit, a first air-liquid heat exchanger, a second air-liquid heat
exchanger, a control device, a fluid conveying device, and
connecting pipes. For ease of description, the control method is
described with reference to FIG. 5. After the cooling system starts
to operate, the method includes the following steps.
[0158] An outdoor temperature T1, a temperature T3 of the
underground soil in which buried pipes are buried, a designed
maximum working temperature Tf of the second air-liquid heat
exchanger, and a designed maximum temperature Tm of the soil
surrounding the underground buried pipes are discussed in the
following.
[0159] In step 2011, the outdoor temperature T1 of the equipment
room and the temperature T3 of the soil surrounding the buried
pipes are acquired.
[0160] Specifically, the outdoor temperature T1 and the temperature
T3 of the soil surrounding the buried pipes are acquired by using a
temperature sensor.
[0161] In step 2012, according to a control policy, the temperature
T3 of the soil surrounding the buried pipes is compared with the
designed maximum temperature Tm of the soil surrounding the
underground buried pipes, and when T3<Tm, step 2014 is
performed; otherwise, step 2013 is performed.
[0162] In step 2013, according to the control policy, the outdoor
temperature T1 is compared with the designed maximum working
temperature Tf of the second air-liquid heat exchanger, and when
T1>Tf step 2016 is performed; otherwise, step 2015 is
performed.
[0163] In step 2014, control the opening of the second circulation
pipeline, and the second circulation pipeline operates.
[0164] Specifically, control the opening of the second circulation
pipeline, and the circulation fluid is driven by the fluid
conveying device to flow in the open second circulation pipeline to
complete the cooling.
[0165] In step 2015, control the opening of the first circulation
pipeline, and the first circulation pipeline operates.
[0166] Specifically, control the opening of the first circulation
pipeline, and the circulation fluid is driven by the fluid
conveying device to flow in the open first circulation pipeline to
complete the cooling.
[0167] In step 2016, control the opening of the first circulation
pipeline and the second circulation pipeline, and the first
circulation pipeline and the second circulation pipeline operate at
the same time.
[0168] Specifically, control the opening of the first circulation
pipeline and the second circulation pipeline at the same time, and
the circulation fluid is driven by the fluid conveying device to
flow in the open first circulation pipeline and second circulation
pipeline to complete the cooling.
[0169] As can be seen from the above, in the control method
according to the embodiment of the present invention, the
circulation fluid flows in the first circulation pipeline and/or
the second circulation pipeline to perform the cooling. Thus, the
present invention achieves better power-saving performance than
conventional air conditioning systems for the equipment room. In
addition, the problem of system instability caused by a high
underground soil temperature is prevented, where the high
underground soil temperature occurs because the soil receives the
heat for a long time. Therefore, the cooling (temperature control)
system can operate more stably.
[0170] In addition, in the embodiment of the present invention,
when the outside air is used for cooling, the outside air is not
directly introduced into the equipment room, so the cooling system
has low requirements for the air quality. Therefore, the
application scenarios are not limited.
[0171] FIG. 15 is a detailed flow chart of a control method
according to Embodiment 3 of the present invention. Referring to
FIG. 15, the method is applicable to a cooling system including a
buried heat exchange unit, a first air-liquid heat exchanger, a
second air-liquid heat exchanger, a control device, a fluid
conveying device, and connecting pipes, and the cooling system is
applied to an equipment room. As shown in FIG. 5, control valves
4.3, 4.4, 4.2, and 4.1 are disposed at different positions of the
connecting pipes 407. The control method includes the following
steps.
[0172] In step 3011, outdoor temperature information T1 is
collected from at least one measure and control point disposed
outside the equipment room.
[0173] It should be noted that when the outdoor temperature
information is collected from multiple measure and control points,
an outdoor mean temperature can be obtained through
calculation.
[0174] In step 3012, according to the control policy, the collected
outdoor temperature T1 is compared with a preset value Ts, and when
T1>Ts, step 3013 is performed; otherwise, step 3014 is
performed.
[0175] That is, control the opening or the closing of the
corresponding control value according to the comparison result.
[0176] The preset value, for example, is approximate to the local
annual mean temperature of the equipment room, or a temperature
value obtained by comprehensively considering the environment
information including the indoor temperature and outdoor
temperature of the equipment room and the soil situation.
[0177] In step 3013, control the opening of the control valve 4.3
and the control valve 4.4.
[0178] In step 3014, control the opening of the control valve 4.2
and the control valve 4.1.
[0179] The control method is described in detail below with
reference to FIG. 5. The specific description is illustrated in the
following: when the outdoor temperature T1 of the equipment room is
higher than the set value Ts, control the opening of the control
valve 4.3 and the control valve 4.4 and close the control valve 4.2
and the control valve 4.1. The circulation fluid 406 flowing out of
the first air-liquid heat exchanger 402 and absorbing the heat
flows to the buried heat exchange unit 401 along the open second
circulation pipeline, the buried heat exchange unit 401 transfers
the heat to the soil 408, and the temperature of the buried heat
exchange unit 401 is lowered. The circulation fluid 406 (i.e., cold
fluid) flows back to the first air-liquid heat exchanger 402 along
the open second circulation pipeline to complete one circulation,
so as to dissipate the heat in the equipment room.
[0180] When the outdoor temperature T1 of the equipment room is
lower than the set value Ts, control the opening of the control
valve 4.1 and the control valve 4.2 and close the control valve 4.3
and the control valve 4.4. The circulation fluid 406 flowing out of
the first air-liquid heat exchanger 402 and absorbing the heat
flows to the second air-liquid heat exchanger 403 along the open
first circulation pipeline. In the second air-liquid heat exchanger
403, the circulation fluid transfers the heat to the outside air,
and has its temperature lowered. The circulation fluid 406 (i.e.,
cold fluid) flows back to the first air-liquid heat exchanger 402
along the open first circulation pipeline to complete one
circulation, so as to dissipate the heat in the equipment room.
[0181] As can be seen from the above, the embodiments of the
present invention fully use the underground soil and the outside
air to dissipate heat according to local climate characteristics
and soil temperature change characteristics of the equipment room.
When the circulation fluid flows to the buried heat exchange unit,
the heat is transferred to the soil; and when the circulation fluid
flows to the second air-liquid heat exchanger, the heat is
transferred to the outside air. Thus, through the alternate or
simultaneous cooling in the two modes, the equipment room can reach
a suitable temperature, and the communication apparatus in the
equipment room can operate normally for a long period. Therefore,
the present invention achieves better power-saving performance than
conventional air conditioners for the equipment room, reduces the
influence on the environment, and prevents the problem of system
instability caused by high underground soil temperature as the soil
receives the heat for a long time, so as to enable the cooling
system to operate more stably.
[0182] In addition, in the embodiment of the present invention,
when the outside air is used for cooling, the outside air is not
directly introduced into the equipment room, so the cooling system
has low requirements for the air quality. Therefore, the
application scenarios are not limited.
[0183] Persons of ordinary skill in the art should understand that
the process of the control method according to the embodiments of
the present invention may be implemented by a program instructing
relevant hardware. The program may be stored in a computer readable
storage medium. When the program is run, the steps of the method
according to the embodiments of the present invention are
performed. The storage medium may be a ROM, a RAM, a magnetic disk,
or an optical disk.
[0184] To sum up, the above descriptions are merely preferred
embodiments of the present invention, but are not intended to limit
the protection scope of the present invention. Any modification,
equivalent replacement, or improvement made without departing from
the spirit and principle of the present invention should fall
within the scope of the present invention.
* * * * *