U.S. patent application number 15/501957 was filed with the patent office on 2018-01-11 for heat exchanger and multi-split system having same.
The applicant listed for this patent is GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD., MIDEA GROUP CO., LTD.. Invention is credited to Bin LUO, Zhijun TAN, Guozhong YANG.
Application Number | 20180010857 15/501957 |
Document ID | / |
Family ID | 53646247 |
Filed Date | 2018-01-11 |
United States Patent
Application |
20180010857 |
Kind Code |
A1 |
YANG; Guozhong ; et
al. |
January 11, 2018 |
HEAT EXCHANGER AND MULTI-SPLIT SYSTEM HAVING SAME
Abstract
A heat exchanger (100) and a multi-split system having the same
are provided. The heat exchanger (100) includes: a manifold (1)
including a main body (11), an inlet (12) disposed in a bottom
portion of the main body (11) and a plurality of split-flow ports
distributed in a side wall of the main body (11) along a length
direction thereof, in which the main body (11) includes a plurality
of pipes from bottom to top, the pipe located downstream has a
smaller flow area than the pipe located upstream in each two
adjacent pipes, each pipe has a height no greater than 0.5 m, and a
number of the pipes is 2.ltoreq.N.ltoreq.3; a header (2)
communicated with the manifold (1) via a plurality of heat exchange
tubes spaced apart from one another along an up and down direction,
the header (2) having an outlet (21) for discharging a
refrigerant.
Inventors: |
YANG; Guozhong; (Foshan,
CN) ; LUO; Bin; (Foshan, CN) ; TAN;
Zhijun; (Foshan, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD.
MIDEA GROUP CO., LTD. |
Foshan
Foshan |
|
CN
CN |
|
|
Family ID: |
53646247 |
Appl. No.: |
15/501957 |
Filed: |
December 21, 2015 |
PCT Filed: |
December 21, 2015 |
PCT NO: |
PCT/CN2015/098131 |
371 Date: |
February 6, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F25B 39/028 20130101;
F28F 9/02 20130101; F28F 2009/029 20130101; F28F 9/0275 20130101;
F28D 7/0066 20130101; F25B 41/067 20130101; F28F 1/00 20130101;
F25B 39/00 20130101; F28F 9/0263 20130101 |
International
Class: |
F28D 7/00 20060101
F28D007/00; F28F 9/02 20060101 F28F009/02; F28F 1/00 20060101
F28F001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 31, 2015 |
CN |
201510149788.7 |
Claims
1. A heat exchanger, comprising: a manifold comprising a main body,
an inlet disposed in a bottom portion of the main body, and a
plurality of split-flow ports distributed in a side wall of the
main body along a length direction of the main body, wherein the
main body comprises a plurality of pipes from bottom to top, the
pipe located downstream has a smaller flow area than the pipe
located upstream in each two adjacent pipes, each pipe has a height
no greater than 0.5 m, and a number of the plurality of pipes is
2.ltoreq.N.ltoreq.3; a header communicated with the manifold via a
plurality of heat exchange tubes, wherein the plurality of heat
exchange tubes are spaced apart from one another along an up and
down direction and the header has an outlet for discharging a
refrigerant.
2. The heat exchanger according to claim 1, wherein the main body
is configured in such a manner that a flow speed of a liquid
refrigerant flowing through a transition portion of each two
adjacent pipes is substantially equal to a flow speed of the liquid
refrigerant at the inlet.
3. The heat exchanger according to claim 2, wherein the flow speed
of the liquid refrigerant flowing through the transition portion of
each two adjacent pipes and the flow speed of the liquid
refrigerant at the inlet both have a value range of 0.4.about.0.6
m/s.
4. The heat exchanger according to claim 1, wherein the header is a
straight pipe.
5. The heat exchanger according to claim 1, wherein the heat
exchange tube is a flat tube.
6. A multi-split system, comprising a heat exchanger wherein the
heat exchanger comprises: a manifold comprising a main body, an
inlet disposed in a bottom portion of the main body, and a
plurality of split-flow ports distributed in a side wall of the
main body along a length direction of the main body, wherein the
main body comprises a plurality of pipes from bottom to top, the
pipe located downstream has a smaller flow area than the pipe
located upstream in each two adjacent pipes, each pipe has a height
no greater than 0.5 m, and a number of the plurality of pipes is
2.ltoreq.N.ltoreq.3; a header communicated with the manifold via a
plurality of heat exchange tubes, wherein the plurality of heat
exchange tubes are spaced apart from one another along an up and
down direction and the header has an outlet for discharging a
refrigerant.
7. The multi-split system according to claim 6, wherein the main
body is configured in such a manner that a flow speed of a liquid
refrigerant flowing through a transition portion of each two
adjacent pipes is substantially equal to a flow speed of the liquid
refrigerant at the inlet.
8. The multi-split system according to claim 7, wherein the flow
speed of the liquid refrigerant flowing through the transition
portion of each two adjacent pipes and the flow speed of the liquid
refrigerant at the inlet both have a value range of 0.4.about.0.6
m/s.
9. The multi-split system according to claim 6, wherein the header
is a straight pipe.
10. The multi-split system according to claim 6, wherein the heat
exchange tube is a flat tube.
Description
FIELD
[0001] The present disclosure relates to a field of heat exchanger
equipment, especially to a heat exchanger and a multi-split system
having the same.
BACKGROUND
[0002] A multi-split system in the related art includes an outdoor
unit, an indoor unit and a refrigerant flow direction switching
device and is divided to a triple-pipe (i.e. three refrigerant
pipes are provided) multi-split system and a double-pipe (i.e. two
refrigerant pipes are provided) multi-split system according to
different amounts of refrigerant pipes between the outdoor unit and
the refrigerant flow direction switching device. Although the
outdoor unit in the double-pipe multi-split system has a relatively
complicated refrigerant circuit, the double-pipe multi-split system
has aroused widespread concern due to a relatively simple
construction and a low cost thereof.
[0003] For the double-pipe multi-split system, the heat exchanger
in the outdoor unit has to be designed to have a fixed refrigerant
flow direction, i.e. the refrigerant flow direction has no business
with refrigerating or heating. In order to reduce a flow resistance
of the refrigerant when the outdoor unit refrigerates, a capillary
in a traditional heat pump machine is usually replaced with a
flute-like pipe, which usually results in a bias flow of a
two-phase refrigerant when the outdoor unit heats, thus reducing a
low heating performance of the system.
SUMMARY
[0004] The present disclosure aims to solve at least one of the
technical problems in the related art. Thus, the present disclosure
provides a heat exchanger which can distribute a two-phase
refrigerant without a split-flow capillary better.
[0005] A multi-split system having the heat exchanger mentioned
above is also provided in the present disclosure.
[0006] The heat exchanger according to embodiments of the present
disclosure includes: a manifold including a main body, an inlet
disposed in a bottom portion of the main body, and a plurality of
split-flow ports distributed in a side wall of the main body along
a length direction of the main body, in which the main body
includes a plurality of pipes along from bottom to top, the pipe
located downstream has a smaller flow area than the pipe located
upstream in each two adjacent pipes, each pipe has a height no
greater than 0.5 m, and a number of the plurality of pipes is
2.ltoreq.N.ltoreq.3; a header communicated with the manifold via a
plurality of heat exchange tubes, in which the plurality of heat
exchange tubes are spaced apart from one another along an up and
down direction and the header has an outlet for discharging a
refrigerant.
[0007] The heat exchanger according to embodiments of the present
disclosure can distribute a two-phase refrigerant without a
split-flow capillary better.
[0008] Specifically, the main body is configured in such a manner
that a flow speed of a liquid refrigerant flowing through a
transition portion of each two adjacent pipes is substantially
equal to a flow speed of the liquid refrigerant at the inlet.
[0009] Further, the flow speed of the liquid refrigerant flowing
through the transition portion of each two adjacent pipes and the
flow speed of the liquid refrigerant at the inlet both a value
range of 0.4.about.0.6 m/s.
[0010] Specifically, the header is a straight pipe.
[0011] Specifically, the heat exchange tube is a flat tube.
[0012] In addition, the multi-split system is also provided in the
present disclosure, which includes the heat exchanger described
above.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 is a schematic view of a heat exchanger according to
an embodiment of the present disclosure;
[0014] FIG. 2 is a schematic view of a heat exchanger according to
another embodiment of the present disclosure.
REFERENCE NUMBERS
[0015] heat exchanger 100; [0016] manifold 1; main body 11; first
pipe 111; second pipe 112; third pipe 113; [0017] inlet 12; [0018]
header 2; outlet 21.
DETAILED DESCRIPTION
[0019] Embodiments of the present disclosure will be described in
detail in the following. Examples of the embodiments are shown in
the drawings. The embodiments described herein with reference to
drawings are explanatory, and used to generally understand the
present disclosure, and shall not be construed to limit the present
disclosure.
[0020] In the specification, it is to be understood that terms such
as "central," "longitudinal," "lateral," "length," "width,"
"thickness," "upper," "lower," "front," "rear," "left," "right,"
"vertical," "horizontal," "top," "bottom," "inner," "outer,"
"clockwise," "counterclockwise," "axial direction," "radium
direction," and "circumferential direction" should be construed to
refer to the orientation as then described or as shown in the
drawings under discussion. These relative terms are for convenience
of description and do not indicate or imply that the device or
element be constructed or operated in a particular orientation,
thus cannot be construed to limit the present disclosure.
[0021] In addition, terms such as "first" and "second" are used
herein for purposes of description and are not intended to indicate
or imply relative importance or significance or to imply the number
of indicated technical features. Thus, the feature defined with
"first" and "second" may comprise one or more of this feature
expressly or implicitly. In the description of the present
disclosure, "a plurality of" means at least two, such as two or
three, unless specified otherwise. In the present disclosure,
unless specified or limited otherwise, the terms "mounted,"
"connected," "communicated", "fixed" are used broadly, and may be,
for example, fixed connections, detachable connections, or integral
connections; may also be mechanical or electrical connections or be
communicated with each other; may also be direct connections or
indirect connections via intermediations; may also be inner
communications of two elements or interact relationships of two
elements, which can be understood by those skilled in the art
according to specific situations, unless specified or limited
otherwise.
[0022] A heat exchanger 100 according to embodiments of the present
disclosure will be described with reference to FIG. 1 to FIG. 2, in
which the heat exchanger 100 may be applied to refrigerating
devices such as a single refrigerating machine, a refrigerating and
heating machine or a multi-split system.
[0023] As shown in FIG. 1 and FIG. 2, the heat exchanger 100
according to embodiments of the present disclosure includes a
manifold 1, a heat exchange tube (not shown in the drawings) and a
header 2.
[0024] Specifically, as shown in FIG. 1, the manifold 1 includes a
main body 11, an inlet 12 and a plurality of split-flow ports (not
shown in the drawings). The inlet 12 is disposed in a bottom
portion of the main body 11 and the plurality of split-flow ports
is distributed in a side wall of the main body 11 along a length
direction of the main body 11.
[0025] The header 2 is communicated with the manifold 1 via a
plurality of heat exchange tubes, in which the plurality of heat
exchange tubes are spaced apart from one another along an up and
down direction, and the header 2 has an outlet 21 for discharging a
refrigerant. As shown in FIG. 1 and FIG. 2, the refrigerant from
the manifold 1 enters the heat exchange tubes through the plurality
of split-flow ports and releases or absorbs heat in the heat
exchange tubes, and lastly the refrigerant after the heat release
or absorption enters the header 2 and further enters other flow
paths via the outlet 21.
[0026] That is, the refrigerant flows by every split-flow port from
bottom to top from the inlet 12 in the bottom portion of the main
body 11, and the refrigerant passing through each split-flow port
enters the header 2 via the heat exchange tubes.
[0027] In a direction from bottom to top, the main body 11 includes
a plurality of pipes, the pipe located downstream has a smaller
flow area than the pipe located upstream in each two adjacent
pipes, and a number of the plurality of pipes is
2.ltoreq.N.ltoreq.3. That is, the number of the pipes is two or
three.
[0028] As shown in FIG. 1, for example in an embodiment of the
present disclosure, the main body 11 includes a first pipe 111 and
a second pipe 112, the inlet 12 is provided in the first pipe 111,
and the second pipe 112 has a smaller cross-sectional area than the
first pipe 111. In other words, the second pipe 112 has a smaller
flow area than the first pipe 111. Thus, the refrigerant enters the
first pipe 111 through the inlet 12 at a certain speed firstly and
flows from bottom to top in the first pipe 111, and a part of the
refrigerant flows through the split-flow ports into the heat
exchange tubes when passing by the split-flow ports, and further
enters the header 2. The liquid refrigerant in the first pipe 111
becomes less and less while flowing upwards and a speed of the
refrigerant trends to decrease, and then the refrigerant enters the
second pipe 112. Since the second pipe 112 has the smaller flow
area than the first pipe 111, the refrigerant can be accelerated to
some extent, such that the speed of the refrigerant in the second
pipe 112 will not be decreased significantly and also enough
refrigerant in the second pipe 112 can flow into the heat exchange
tubes through the split-flow ports, thus improving a working
efficiency of the heat exchanger 100 effectively.
[0029] Certainly, the present disclosure is not limited to this. As
shown in FIG. 2, in another embodiment of the present disclosure,
the main body 11 may also include a first pipe 111, a second pipe
112 and a third pipe 113, the inlet 12 is provided in the first
pipe 111, the second pipe 112 has a smaller flow area than the
first pipe 111, and the third pipe 113 has a smaller flow area than
the second pipe 112. Based on a same principle, by setting lengths
and flow areas of the first pipe 111, the second pipe 112 and the
third pipe 113 reasonably, the refrigerant can flow through the
split-flow ports in a top portion of the main body 11 so as to
improve a use ratio of the heat exchange tubes corresponding to the
third pipe 113 effectively, thus further improving the working
efficiency of the heat exchanger 100 effectively.
[0030] Each pipe has a height no greater than 0.5 m, which ensures
that the refrigerant can flow to the top portion of the main body
11, thus improving a working efficiency of an upper region of the
heat exchanger 100 effectively.
[0031] In the heat exchanger according to embodiments of the
present disclosure 100, the main body 11 includes a plurality of
pipes and the pipe located downstream has the smaller flow area
than the pipe located upstream in each two adjacent pipes, such
that the flow speed of the liquid refrigerant can be increased when
the refrigerant flows through the transition portion of each two
adjacent pipes, which has a function of speeding up the refrigerant
on its way and ensures that enough liquid refrigerant can be
provided to the upper region of the manifold 1 so as to allow the
heat exchanger 100 to be used efficiently, so the heat exchanger
100 can distribute the two-phase refrigerant without a split-flow
capillary better.
[0032] Specifically, the main body 11 is configured in such a
manner that a flow speed of the liquid refrigerant flowing through
the transition portion of each two adjacent pipes is substantially
equal to a flow speed of the liquid refrigerant at the inlet 12.
That is, a difference between the flow areas of each two adjacent
pipes is designed to improve the flow speed of the liquid
refrigerant flowing through the transition portion to be
substantially equal to the flow speed of the liquid refrigerant at
the inlet, so as to further ensure the function of accelerating the
liquid refrigerant on its way, such that the speed of the liquid
refrigerant flowing from the pipe upstream to the pipe downstream
will not be decreased significantly and the liquid refrigerant can
enter the heat exchange tubes in an upper region of the heat
exchanger 100, thus further improving the working efficiency of the
heat exchanger 100 effectively.
[0033] Specifically, the flow speed of the liquid refrigerant
flowing through the transition portion of each two adjacent pipes
and the flow speed of the liquid refrigerant at the inlet 12 both
have a value range of 0.4.about.0.6 m/s. Thus, the flow speed of
the liquid refrigerant is controlled in a certain range, which
allows the liquid refrigerant to substantially uniformly enter the
heat exchange tubes through the split-flow ports effectively, thus
improving the working efficiency of the whole heat exchanger
100.
[0034] In examples shown in FIG. 1 and FIG. 2, the header 2 is a
straight pipe. The refrigerant flowing out from the heat exchange
tubes enters the header 2 and flows from top to bottom in the
header 2, and it is advantageous for a circulation of the
refrigerant by configuring the header 2 as the straight pipe, thus
improving the working efficiency of the heat exchanger 100.
[0035] In an example of the present disclosure, the heat exchange
tube is a flat tube, which can increase a heat exchange area of the
refrigerant and the air, so that the refrigerant can absorb heat or
release heat better, thus further improving the working efficiency
of the heat exchanger 100 effectively. Meanwhile, a fin may be
disposed between each two adjacent heat exchange tubes in the up
and down direction, so as to increase a heat exchange area of the
whole heat exchanger 100 and the air, thus further improving a heat
exchange effect of the heat exchanger 100.
[0036] In addition, the present disclosure further provides a
multi-split system, which includes the heat exchanger 100 described
above.
[0037] In the present disclosure, unless specified or limited
otherwise, a structure in which a first feature is "on" or "below"
a second feature may include an embodiment in which the first
feature is in direct contact with the second feature, and may also
include an embodiment in which the first feature and the second
feature are not in direct contact with each other, but are
contacted via an additional feature formed therebetween.
Furthermore, a first feature "on," "above," or "on top of" a second
feature may include an embodiment in which the first feature is
right or obliquely "on," "above," or "on top of" the second
feature, or just means that the first feature is at a height higher
than that of the second feature; while a first feature "below,"
"under," or "on bottom of" a second feature may include an
embodiment in which the first feature is right or obliquely
"below," "under," or "on bottom of" the second feature, or just
means that the first feature is at a height lower than that of the
second feature.
[0038] Reference throughout this specification to "an embodiment,"
"some embodiments," "an example," "a specific example," or "some
examples," means that a particular feature, structure, material, or
characteristic described in connection with the embodiment or
example is included in at least one embodiment or example of the
present disclosure. Thus, the appearances of the phrases above in
various places throughout this specification are not necessarily
referring to the same embodiment or example of the present
disclosure. Furthermore, the particular features, structures,
materials, or characteristics may be combined in any suitable
manner in one or more embodiments or examples. In addition,
different embodiments or examples and features of different
embodiments or examples can be united or combined without
conflicting premise by those skilled in the related art. Although
embodiments of the present disclosure have been shown and
described, it would be appreciated that the embodiments above are
illustrative and cannot be construed to limit the present
disclosure, and changes, variations, alternatives, and
modifications can be made in the embodiments without departing from
scope of the present disclosure by those skilled in the related
art.
* * * * *