U.S. patent application number 16/618158 was filed with the patent office on 2021-11-25 for heat pump system and air conditioner.
The applicant listed for this patent is GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD., HEFEI MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD.. Invention is credited to Shuqing LIU, Bin LUO, Zhijun TAN, Kun YANG, Lei ZHAN.
Application Number | 20210364206 16/618158 |
Document ID | / |
Family ID | 1000005810350 |
Filed Date | 2021-11-25 |
United States Patent
Application |
20210364206 |
Kind Code |
A1 |
LUO; Bin ; et al. |
November 25, 2021 |
HEAT PUMP SYSTEM AND AIR CONDITIONER
Abstract
A heat pump system (100) and an air conditioner are provided.
The heat pump system (100) includes a compressor assembly (10), an
outdoor heat exchanger (20), an indoor heat exchanger (30), a
heating and heat accumulation device (50) and a switching device
(40). The heating and heat accumulation device (50) is connected in
series with the switching device (40). In the first heating mode, a
refrigerant discharged out of the compressor assembly (10) enters
the indoor heat exchanger (30) and the outdoor heat exchanger (20)
in sequence after passing through the switching device (40) and the
heating and heat accumulation device (50). In the defrosting mode,
the refrigerant discharged out of the compressor assembly (10)
enters the indoor heat exchanger (30), the outdoor heat exchanger
(20) and the heating and heat accumulation device (50) in sequence
after passing through the switching device (40).
Inventors: |
LUO; Bin; (Hefei, CN)
; YANG; Kun; (Hefei, CN) ; ZHAN; Lei;
(Hefei, CN) ; LIU; Shuqing; (Hefei, CN) ;
TAN; Zhijun; (Hefei, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HEFEI MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD.
GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD. |
Hefei
Foshan |
|
CN
CN |
|
|
Family ID: |
1000005810350 |
Appl. No.: |
16/618158 |
Filed: |
May 30, 2019 |
PCT Filed: |
May 30, 2019 |
PCT NO: |
PCT/CN2019/089266 |
371 Date: |
November 29, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F25B 2500/26 20130101;
F25B 2400/19 20130101; F25B 41/20 20210101; F25B 13/00 20130101;
F25B 47/025 20130101; F25B 2313/008 20130101; F25B 2313/02742
20130101 |
International
Class: |
F25B 47/02 20060101
F25B047/02; F25B 13/00 20060101 F25B013/00; F25B 41/20 20060101
F25B041/20 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 24, 2018 |
CN |
201811253993.8 |
Claims
1. A heat pump system, comprising a compressor assembly, an outdoor
heat exchanger and an indoor heat exchanger, wherein the heat pump
system further comprises a heating and heat accumulation device and
a switching device, wherein the compressor assembly, the switching
device, the outdoor heat exchanger and the indoor heat exchanger
are connected in sequence to form a refrigerating circuit, and the
heating and heat accumulation device is connected in series with
the switching device, wherein the heat pump system has a first
heating mode, a second heating mode and a defrosting mode under the
switch of the switching device; in the first heating mode, a
refrigerant discharged out of the compressor assembly enters the
indoor heat exchanger and the outdoor heat exchanger in sequence
after passing through the switching device and the heating and heat
accumulation device, and flows back to the compressor assembly; in
the second heating mode, the refrigerant discharged out of the
compressor assembly enters the indoor heat exchanger and the
outdoor heat exchanger in sequence after passing through the
switching device, and flows back to the compressor assembly; in the
defrosting mode, the refrigerant discharged out of the compressor
assembly enters the indoor heat exchanger and the outdoor heat
exchanger in sequence after passing through the switching device,
and the refrigerant flowing out of the outdoor heat exchanger flows
back to the compressor assembly after passing through the heating
and heat accumulation device.
2. The heat pump system according to claim 1, wherein the switching
device comprises a first four-way valve and a second four-way valve
connected in series, the first four-way valve comprises first to
fourth valve ports, the second four-way valve comprises fifth to
eighth valve ports, the compressor assembly is communicated with
the first valve port, the outdoor heat exchanger is communicated
with the eighth valve port, the heating and heat accumulation
device has a first end communicated with the fourth valve port and
a second end communicated with the fifth valve port, the indoor
heat exchanger is communicated with the second valve port and the
sixth valve port, the third valve port and the seventh valve port
are both communicated with a suction end of the compressor
assembly; in the first heating mode, the first valve port of the
first four-way valve is communicated with the fourth valve port of
the first four-way valve, and the fifth valve port of the second
four-way valve is communicated with the sixth valve port, the
seventh valve port and the eighth valve port of the second four-way
valve, respectively; in the second heating mode, the first valve
port of the first four-way valve is communicated with the second
valve port of the first four-way valve, and the seventh valve port
of the second four-way valve is communicated with the eighth valve
port of the second four-way valve; in the defrosting mode, the
first valve port of the first four-way valve is communicated with
the second valve port, the third valve port and the fourth valve
port of the first four-way valve, respectively, and the fifth valve
port of the second four-way valve is communicated with the eighth
valve port of the second four-way valve.
3. The heat pump system according to claim 2, wherein the switching
device further comprises a first solenoid valve, and the first
solenoid valve is arranged between the sixth valve port and the
indoor heat exchanger.
4. The heat pump system according to claim 3, wherein the heat pump
system further comprises a first check valve, and the first check
valve is connected between the outdoor heat exchanger and the
heating and heat accumulation device.
5. The heat pump system according to claim 4, wherein the heat pump
system further comprises a throttling device, and the throttling
device has a first end communicated with the heating and heat
accumulation device and a second end communicated with the fifth
valve port and the first check valve.
6. The heat pump system according to claim 2, wherein the heat pump
system further comprises a second check valve, and the second check
valve is connected between the second valve port and the indoor
heat exchanger.
7. The heat pump system according to claim 6, wherein the heat pump
system further has a refrigeration mode under a switch of the
switching device, and in the refrigeration mode, the first valve
port of the first four-way valve is communicated with the fourth
valve port of the first four-way valve, the fifth valve port of the
second four-way valve is communicated with the eighth valve port,
the sixth valve port and the seventh valve port of the second
four-way valve, respectively.
8. The heat pump system according to claim 1, wherein the heating
and heat accumulation device comprises a second solenoid valve and
a heat exchanger, and the heat exchanger is connected in series
with the second solenoid valve and communicated with the switching
device; the heating and heat accumulation device further comprises
a heating assembly and a heat accumulation assembly arranged to an
outer wall of the heat exchanger.
9. The heat pump system according to claim 8, wherein the heating
assembly is configured as an exogenous heater; and the heat
accumulation assembly is configured as a heat accumulator.
10. An air conditioner, comprising a heat pump system, comprising:
a compressor assembly, an outdoor heat exchanger and an indoor heat
exchanger, wherein the heat pump system further comprises a heating
and heat accumulation device and a switching device, the compressor
assembly, the switching device, the outdoor heat exchanger and the
indoor heat exchanger are connected in sequence to form a
refrigerating circuit, and the heating and heat accumulation device
is connected in series with the switching device, and wherein the
heat pump system has a first heating mode, a second heating mode
and a defrosting mode under a switch of the switching device, in
the first heating mode, a refrigerant discharged out of the
compressor assembly enters the indoor heat exchanger and the
outdoor heat exchanger in sequence after passing through the
switching device and the heating and heat accumulation device, and
flows back to the compressor assembly; in the second heating mode,
the refrigerant discharged out of the compressor assembly enters
the indoor heat exchanger and the outdoor heat exchanger in
sequence after passing through the switching device, and flows back
to the compressor assembly; in the defrosting mode, the refrigerant
discharged out of the compressor assembly enters the indoor heat
exchanger and the outdoor heat exchanger in sequence after passing
through the switching device, and the refrigerant flowing out of
the outdoor heat exchanger flows back to the compressor assembly
after passing through the heating and heat accumulation device.
Description
CROSS-REFERENCES TO RELATED APPLICATIONS
[0001] The present disclosure is a national phase application of
International Application No. PCT/CN2019/089266, filed on May 30,
2019, which claims the priority of Chinese Application No.
201811253993.8, filed in the Chinese Patent Office on Oct. 24,
2018, the entireties of which are herein incorporated by
reference.
FIELD
[0002] The present disclosure relates to a technical field of air
conditioners, and particularly to a heat pump system and an air
conditioner having the same.
BACKGROUND
[0003] When the heat pump system is in the heating mode, the
refrigerant absorbs heat from the outdoor side through the outdoor
heat exchanger, then increases its pressure and temperature through
the compressor, and discharges the heat from the outdoor side into
the room to achieve a heating effect. However, in winter, the
outdoor temperature is low, the refrigerant in the outdoor heat
exchanger needs to have a temperature lower than the temperature of
the outdoor air to absorb the heat of the outdoor air, and the
outdoor heat exchanger will frost in the heating mode, and the
defrosting is required after frosting, to ensure that the system
can run safely and efficiently.
[0004] The existing heat pump system needs to absorb heat from the
indoor side during the defrosting process, and the indoor
temperature decreases, and the indoor unit may not heat normally.
Further, when the outdoor unit resumes the heating mode, it takes a
while to switch and start the compressor to heat the refrigerant
system gradually, thus reducing the operating energy
efficiency.
[0005] In addition, when the outdoor temperature is low, the
refrigeration oil discharged from the compressor and the liquid
refrigerant are highly soluble with each other. After being
separated by the oil separator, most of the refrigeration oil
returned to the compressor is the liquid refrigerant, and thus the
concentration of the refrigeration oil in the compressor may not
reach a safe concentration quickly. In order to ensure the system
reliability, the existing heat pump system needs to operate at low
frequency for a long time, to vaporize the liquid refrigerant in
the compressor, reduce the refrigerant content in the refrigeration
oil returned by the oil separator, and hence increase the content
of the refrigeration oil in the compressor to the safe
concentration. After the content of the refrigeration oil reaches
the safe concentration, the heat pump system can operate normally.
This process lasts for a long time. Thus, the indoor unit still has
not blown out hot air even ten minutes after the start-up, and
hence the start-up speed is slow.
SUMMARY
[0006] The main objective of the present disclosure is to provide a
heat pump system, which is intended to achieve a defrosting without
stopping an indoor unit, to improve the operating energy efficiency
and the indoor heating comfort, while ensuring the normal heating
of the indoor unit. During the low temperature start-up process,
heat is supplied to the low-temperature gas-liquid mixed
refrigerant discharged from the compressor, and the liquid
refrigerant contained in the refrigeration oil discharged from the
compressor is evaporated as soon as possible, to rapidly reduce the
refrigerant content in the refrigeration oil returned by the oil
separator, so that the concentration of the refrigeration oil in
the compressor is quickly increased to a safe level, thus reducing
the time from the start-up to the high frequency operation of the
compressor and increasing the start-up speed of the system.
[0007] In order to achieve the above objective, the present
disclosure provides a heat pump system, which includes a compressor
assembly, an outdoor heat exchanger and an indoor heat exchanger.
The heat pump system further includes a heating and heat
accumulation device and a switching device. The compressor
assembly, the switching device, the outdoor heat exchanger and the
indoor heat exchanger are connected in sequence to form a
refrigerating circuit. The heating and heat accumulation device is
connected in series with the switching device. The heat pump system
has a first heating mode, a second heating mode and a defrosting
mode under the switch of the switching device. In the first heating
mode, a refrigerant discharged out of the compressor assembly
enters the indoor heat exchanger and the outdoor heat exchanger in
sequence after passing through the switching device and the heating
and heat accumulation device, and flows back to the compressor
assembly. In the second heating mode, the refrigerant discharged
out of the compressor assembly enters the indoor heat exchanger and
the outdoor heat exchanger in sequence after passing through the
switching device, and flows back to the compressor assembly. In the
defrosting mode, the refrigerant discharged out of the compressor
assembly enters the indoor heat exchanger and the outdoor heat
exchanger in sequence after passing through the switching device,
and the refrigerant flowing out of the outdoor heat exchanger flows
back to the compressor assembly after passing through the heating
and heat accumulation device.
[0008] Further, the switching device includes a first four-way
valve and a second four-way valve connected in series, the first
four-way valve includes first to fourth valve ports, the second
four-way valve includes fifth to eighth valve ports, the compressor
assembly is communicated with the first valve port, the outdoor
heat exchanger is communicated with the eighth valve port, the
heating and heat accumulation device has a first end communicated
with the fourth valve port and a second end communicated with the
fifth valve port, the indoor heat exchanger is communicated with
the second valve port and the sixth valve port, the third valve
port and the seventh valve port are both communicated with a
suction end of the compressor assembly. In the first heating mode,
the first valve port of the first four-way valve is communicated
with the fourth valve port of the first four-way valve, and the
fifth valve port of the second four-way valve is communicated with
the sixth valve port, the seventh valve port and the eighth valve
port of the second four-way valve, respectively. In the second
heating mode, the first valve port of the first four-way valve is
communicated with the second valve port of the first four-way
valve, and the seventh valve port of the second four-way valve is
communicated with the eighth valve port of the second four-way
valve. In the defrosting mode, the first valve port of the first
four-way valve is communicated with the second valve port, the
third valve port and the fourth valve port of the first four-way
valve, respectively, and the fifth valve port of the second
four-way valve is communicated with the eighth valve port of the
second four-way valve.
[0009] Further, the switching device also includes a first solenoid
valve, and the first solenoid valve is arranged between the sixth
valve port and the indoor heat exchanger.
[0010] Further, the heat pump system also includes a first check
valve, and the first check valve is connected between the outdoor
heat exchanger and the heating and heat accumulation device.
[0011] Further, the heat pump system also includes a throttling
device, and the throttling device has a first end communicated with
the heating and heat accumulation device and a second end
communicated with the fifth valve port and the first check
valve.
[0012] Further, the heat pump system also includes a second check
valve, and the second check valve is connected between the second
valve port and the indoor heat exchanger.
[0013] Further, the heat pump system also has a refrigeration mode
under the switch of the switching device, and in the refrigeration
mode, the first valve port of the first four-way valve is
communicated with the fourth valve port of the first four-way
valve, the fifth valve port of the second four-way valve is
communicated with the eighth valve port, the sixth valve port and
the seventh valve port of the second four-way valve,
respectively.
[0014] Further, the heating and heat accumulation device includes a
second solenoid valve and a heat exchanger, and the heat exchanger
is connected in series with the second solenoid valve and
communicated with the switching device. The heating and heat
accumulation device further includes a heating assembly and/or a
heat accumulation assembly arranged to an outer wall of the heat
exchanger.
[0015] Further, the heating assembly is configured as an exogenous
heater; and/or the heat accumulation assembly is configured as a
heat accumulator.
[0016] The present disclosure also provides an air conditioner,
which includes a heat pump system. The heat pump system includes a
compressor assembly, an outdoor heat exchanger and an indoor heat
exchanger. The heat pump system further includes a heating and heat
accumulation device and a switching device. The compressor
assembly, the switching device, the outdoor heat exchanger and the
indoor heat exchanger are connected in sequence to form a
refrigerating circuit. The heating and heat accumulation device is
connected in series with the switching device. The heat pump system
has a first heating mode, a second heating mode and a defrosting
mode under the switch of the switching device. In the first heating
mode, a refrigerant discharged out of the compressor assembly
enters the indoor heat exchanger and the outdoor heat exchanger in
sequence after passing through the switching device and the heating
and heat accumulation device, and flows back to the compressor
assembly. In the second heating mode, the refrigerant discharged
out of the compressor assembly enters the indoor heat exchanger and
the outdoor heat exchanger in sequence after passing through the
switching device, and flows back to the compressor assembly. In the
defrosting mode, the refrigerant discharged out of the compressor
assembly enters the indoor heat exchanger and the outdoor heat
exchanger in sequence after passing through the switching device,
and the refrigerant flowing out of the outdoor heat exchanger flows
back to the compressor assembly after passing through the heating
and heat accumulation device.
[0017] When the heat pump system in the technical solution of the
present disclosure in the first heating mode, the refrigerant
discharged out of the compressor assembly enters the indoor heat
exchanger and the outdoor heat exchanger in sequence after passing
through the switching device and the heating and heat accumulation
device, and flows back to the compressor assembly. In this process,
since the refrigerant is heated by the heating and heat
accumulation device, the operating energy efficiency of the whole
heat pump system is improved, and the start-up speed is increased.
When the heat pump system starts up and operates normally, the heat
pump system can be switched between the first heating mode and the
second heating mode. In the second heating mode, the refrigerant
discharged out of the compressor assembly enters the indoor heat
exchanger and the outdoor heat exchanger in sequence after passing
through the switching device, and flows back to the compressor
assemble. In this process, the normal heating of the heat pump
system is ensured.
[0018] Further, when the heat pump system defrosts in the
defrosting mode, the refrigerant with a high temperature and a high
pressure discharged out of the compressor assembly is partially
condensed in the indoor heat exchanger, and then flows to the
outdoor heat exchanger to defrost the outdoor heat exchanger. The
refrigerant flowing out of the outdoor heat exchanger absorbs heat
and evaporates through the heating and heat accumulation device,
and flows back to the compressor assembly, thus achieving the
defrosting without stopping the heating. During the defrosting, the
indoor temperature keeps not to be reduced, thus improving the
operating energy efficiency and the heating comfort of the heat
pump system. The heat pump system provided by the present
disclosure uses the switching device to switch the different modes
of the refrigerant discharged out of the compressor assembly. Also,
the heating and heat accumulation device is used to allow the heat
pump system to realize the defrosting without stopping the heating
while heating, thus improving the operating energy efficiency and
the heating comfort of the heat pump system.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] To describe technical solutions in embodiments of the
present disclosure more clearly, the following will briefly
introduce the accompanying drawings required for the description of
the embodiments. The accompanying drawings described below show
some embodiments of the present disclosure.
[0020] FIG. 1 is a schematic view illustrating a flow direction of
a refrigerant in a heat pump system in a first heating mode of the
present disclosure.
[0021] FIG. 2 is a schematic view illustrating a flow direction of
a refrigerant in a heat pump system in a second heating mode of the
present disclosure.
[0022] FIG. 3 is a schematic view illustrating a flow direction of
a refrigerant in a heat pump system in a defrosting mode of the
present disclosure.
[0023] FIG. 4 is a schematic view illustrating a flow direction of
a refrigerant in a heat pump system in a refrigeration mode of the
present disclosure.
REFERENCE NUMERALS
TABLE-US-00001 [0024] Reference numeral Name 100 heat pump system
10 compressor assembly 11 compressor 111 exhaust port 112 liquid
returning port 12 liquid separator 20 outdoor heat exchanger 30
indoor heat exchanger 40 switching device 41 first four-way valve
A1 first valve port B1 second valve port C1 third valve port D1
fourth valve port 42 second four-way valve A2 fifth valve port B2
sixth valve port C2 seventh valve port D2 eighth valve port 43
first solenoid valve 50 heating and heat accumulation device 51
heating assembly 52 heat exchanger 60 first check valve 70
throttling device 80 second check valve
[0025] The realization of the object, the function features and the
advantages of the present disclosure will be further described in
combination with the embodiments with reference to the accompanying
drawings.
DETAILED DESCRIPTION OF THE DISCLOSURE
[0026] Embodiments of the present disclosure will be clearly and
completely described below with reference to the accompanying
drawings in the embodiments of the present disclosure. The
embodiments described herein are only a part but not all of the
embodiments of the present disclosure.
[0027] It should be noted that all directional indications (such as
up, down, left, right, front, back, . . . ) in the embodiments of
the present disclosure are only used to explain relative position
relationships and motion situations between components in a
specific posture (as illustrated in the drawings). If the specific
posture changes, the directional indication also changes
accordingly.
[0028] 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 embodiments of the disclosure. Thus, the feature
defined with "first" and "second" may indicate or imply to comprise
one or more of this feature.
[0029] The present disclosure provides a heat pump system 100.
[0030] As illustrated in FIG. 1 to FIG. 4, in embodiments of the
present disclosure, the heat pump system 100 includes a compressor
assembly 10, an outdoor heat exchanger 20, an indoor heat exchanger
30, a heating and heat accumulation device 50 and a switching
device 40. The compressor assembly 10, the switching device 40, the
outdoor heat exchanger 20 and the indoor heat exchanger 30 are
connected in sequence to form a refrigerating circuit. The heating
and heat accumulation device 50 and the switching device 40 are
arranged in series.
[0031] The heat pump system 100 has a first heating mode, a second
heating mode and a defrosting mode under switching of the switching
device 40. In the first heating mode, the refrigerant discharged
from the compressor assembly 10 enters the indoor heat exchanger 30
and the outdoor heat exchanger 20 in sequence via passing through
the witching device 40 and the heating and heat accumulation device
50, and flows back to the compressor assembly 10. In the second
heating mode, the refrigerant discharged from the compressor
assembly 10 enters the indoor heat exchanger 30 and the outdoor
heat exchanger 20 in sequence via passing through the switching
device 40, and flows back to the compressor assembly. In the
defrosting mode, the refrigerant discharged from the compressor
assembly 10 enters the indoor heat exchanger 30 and the outdoor
heat exchanger 20 in sequence via passing through the switching
device 40, and the refrigerant flowing out of the outdoor heat
exchanger 20 flows back to the compressor assembly 10 via passing
through the heating and heat accumulation device 50.
[0032] In one embodiment, the compressor assembly 10 includes a
compressor 11 and a liquid separator 12 connected in series, the
compressor assembly 10 has an exhaust port 111 and a liquid
returning port 112, the exhaust port 111 is provided to the
compressor 11, the liquid returning port 112 is provided to the
liquid separator 12, and the exhaust port 111 of the compressor 11
is connected with the switching device 40 for discharging a
superheated steam with a high temperature and a high pressure.
[0033] In the embodiments, the heat pump system 100 includes the
first heating mode, the second heating mode and the defrosting mode
under the switching of the switching device 40. It can be
understood that, when the heat pump system 100 is in the first
heating mode, the refrigerant is discharged out of the exhaust port
111 of the compressor 11, passes through the switching device 40
and the heating and heat accumulation device 50, enters the indoor
heat exchanger 30 and the outdoor heat exchanger 20 in sequence,
flows back to the liquid separator 12 through the liquid returning
port 112, and flows into the compressor 11 again. In this process,
the refrigerant is further heated by the heating and heat
accumulation device 50, and the refrigerant still has a high
temperature after releasing heat in the indoor heat exchanger 30,
and allows the outdoor heat exchanger 20 not to be frosted when
absorbing heat in the outdoor heat exchanger 20, thus improving an
operating energy efficiency of the whole heat pump system 100, and
increasing a start-up speed.
[0034] After being normally started up to operate, the heat pump
system 100 is switched by the switching device 40 to the second
heating mode, and the second heating mode is a normal heating mode.
When the heat pump system 100 is in the second heating mode, the
refrigerant is discharged out of the exhaust port 111 of the
compressor 11, enters the indoor heat exchanger 30 and the outdoor
heat exchanger 20 in sequence via passing through the switching
device 40, flows back to the liquid separator 12 through the liquid
returning port 112, and flows into the compressor 11 again. In this
process, the refrigerant with the high temperature and the high
pressure discharged out of the exhaust port 111 of the compressor
11 releases heat in the indoor heat exchanger 30, to increase a
temperature of an indoor environment, and absorbs heat in the
outdoor heat exchanger 20, to realize a normal pure heating mode.
It can be understood that, after being normally started up to
operate, the heat pump system 100 may also be switched between the
first heating mode and the second heating mode.
[0035] When the heat pump system 100 defrosts in the defrosting
mode, the refrigerant is discharged out of the exhaust port 111 of
the compressor 11, further partially condensed in the indoor heat
exchanger 30, and then flows to the outdoor heat exchanger 20 to
defrost the outdoor heat exchanger 20. The refrigerant flowing out
of the outdoor heat exchanger 20 absorbs heat and evaporates
through heating and heat accumulation device 40, further flows back
to the liquid separator 12 through the liquid returning port 112,
and flows into the compressor 11 again, to realize the defrosting
without stopping the heating. Thus, during the defrosting, the
indoor temperature keeps not to be decreased, to improve the
operating energy efficiency and the heating comfort of the heat
pump system 100.
[0036] The heat pump system 100 according to embodiments of the
present disclosure, the switching device 40 is used to switch
different modes of the refrigerant discharged from the compressor
assembly 10, and the heating and heat accumulation device 40 allows
the heat pump system 100 to defrost without stopping the heating
while heating, thus improving the operating energy efficiency and
the heating comfort of the system.
[0037] Further, as illustrated in FIG. 1 to FIG. 3, in the
embodiment, the switching device 40 includes a first four-way valve
41 and a second four-way valve 42 connected in series. The first
four-way valve 41 has a first valve port A1, a second valve port
B1, a third valve port C1 and a fourth valve port D1. The second
four-way valve 42 has a fifth valve port A2, a sixth valve port B2,
a seventh valve port C2 and an eighth valve port D2.
[0038] In one embodiment, the compressor assembly 10 is
communicated with the first valve port A1, the outdoor heat
exchanger 20 is communicated with the eighth valve port D2, the
heating and heat accumulation device 50 has a first end
communicated with the fourth valve port D1 and a second end
communicated with the fifth valve port A2, the indoor heat
exchanger 30 is communicated with the second valve port B1 and the
sixth valve port B2, and the third valve port C1 and the seventh
valve port C2 are both communicated with a suction end of the
compressor assembly 10. It can be understood that the heat pump
system 100 of the present disclosure can achieve the switch of
different modes by switching the valve ports of the first four-way
valve 41 and the second four-way valve 42, and also the heating and
heat accumulation device 50 is used to cooperate with the different
modes, and the heat pump system 100 can achieve the quick start-up,
the normal heating, the defrosting without stopping the heating,
and other functions, thus improving the operating energy efficiency
and the heating comfort of the system.
[0039] In the embodiment, when the heat pump system 100 is in the
first heating mode, the first valve port A1 of the first four-way
valve 41 is communicated with the fourth valve port D1 of the first
four-way valve 41, and the fifth valve port A2 of the second
four-way valve 42 is communicated with the sixth valve port B2, the
seventh valve port C2 and the eighth valve port D2 of the second
four-way valve 42, respectively. The refrigerant discharged out of
the exhaust port 111 of the compressor 11 passes through the first
valve port A1 and the fourth valve port D1 of the first four-way
valve 41, then is further heated by the heating and heat
accumulation device 50, and enters the indoor heat exchanger 30 to
release heat after passing through the fifth valve port A2 and the
sixth valve port B2 of the second four-way valve 42. In this case,
the refrigerant still has a high temperature, and absorbs heat in
the outdoor heat exchanger 20. Then, the refrigerant flows out of
the eighth valve port D2 and the seventh valve port C2 of the
second four-way valve 42, further flows back to the liquid
separator 12 through the liquid returning port 112, and flows into
the compressor 11 again. Since the refrigerant of the high
temperature absorbs heat in the outdoor heat exchanger 20, the
outdoor heat exchanger 20 will not be frosted, thus improving the
operating energy efficiency of the whole heat pump system 100, and
increasing the start-up speed.
[0040] When the heat pump system 100 is in the second heating mode,
the first valve port A1 of the first four-way valve 41 is
communicated with the second valve port B1 of the first four-way
valve 41, and the seventh valve port C2 of the second four-way
valve 42 is communicated with the eighth valve port D2 of the
second four-way valve 42. The refrigerant discharged out of the
exhaust port 111 of the compressor 11 passes through the first
valve port A1 and the second valve port B1 of the first four-way
valve 41, enters the indoor heat exchanger 30 to release heat, to
increase a temperature in an indoor environment, further absorbs
heat in the outdoor heat exchanger 20, then flows out of the eighth
valve port D2 and the seventh valve port C2 of the second four-way
valve 42, back to the liquid separator 12 through the liquid
returning port 112, and further into the compressor 11 again, thus
realizing the normal pure heating mode.
[0041] When the heat pump system 100 is in the defrosting mode, the
first valve port A1 of the first four-way valve 41 is communicated
with the second valve port B1, the third valve port C1 and the
fourth valve port D1 of the first four-way valve 41, and the fifth
valve port A2 of the second four-way valve 42 is communicated with
the eighth valve port D2 of the second four-way valve 42. The
refrigerant discharged out of the exhaust port 111 of the
compressor 11 passes through the first valve port A1 and the second
valve port B1 of the first four-way valve 41, enters the indoor
heat exchanger 30 to release heat, to increase the temperature in
the indoor environment, further absorbs heat in the outdoor heat
exchanger 20, then flows out of the eighth valve port D2 and the
fifth valve port A2 of the second four-way valve 42, further
absorbs heat and evaporates through the heating and heat
accumulation device 40, and flows back to the liquid separator 12
through the liquid returning port 112, and further into the
compressor 11 again. In this process, the heat pump system 100
achieves the defrosting without stopping the heating, and the
indoor temperature keeps not to be decreased during the defrosting,
thus improving the operating energy efficiency and the heating
comfort of the heat pump system 100.
[0042] Further, as illustrated in FIG. 4, the heat pump system 100
also has a refrigeration mode under the switch of the switching
device 40, i.e. a normal refrigeration mode of the heat pump system
100. When the heat pump system 100 is in the refrigeration mode,
the first valve port A1 of the first four-way valve 41 is
communicated with the fourth valve port D1 of the first four-way
valve 41, and the fifth valve port A2 of the second four-way valve
42 is communicated with the eighth valve port D2, the sixth valve
port B2 and the seventh valve port C2 of the second four-way valve
42, respectively. The refrigerant discharged out of the exhaust
port 111 of the compressor 11 passes through the first valve port
A1 and the fourth valve port D1 of the first four-way valve 41, and
further through the heating and heat accumulation device 40. In
this case, the heating and heat accumulation device 40 absorbs and
stores a part of heat of the refrigerant with the high temperature
and the high pressure. The refrigerant further flows into the
outdoor heat exchanger 20 to release heat through the fifth valve
port A2 and the eighth valve port D2 of the second four-way valve
42, also absorbs heat in the indoor heat exchanger 30, to reduce
the temperature in the indoor environment, and flows out of the
sixth valve port B2 and the seventh valve port C2 of the second
four-way valve 42, back to the liquid separator 12 through the
liquid returning port 112, and into the compressor 11 again.
[0043] Further, as illustrated in FIG. 1 to FIG. 4, in the
embodiments, the switching device 40 further includes a first
solenoid valve 43, and the first solenoid valve 43 is arranged
between the sixth valve port B2 and the indoor heat exchanger 30.
It can be understood that, by providing the first solenoid valve
43, it is convenient for the first solenoid valve 43 to cooperate
with the second four-way valve 42 when the switching device 40
switches the different modes, thus realizing the direct switch of
the different modes smoothly.
[0044] Further, as illustrated in FIG. 1 to FIG. 4, in the
embodiments, the heat pump system 100 further includes a throttling
device 70 and a first check valve 60, the first check valve 60 is
connected between the outdoor heat exchanger 20 and the heating and
heat accumulation device 50, the throttling device 70 has a first
end communicated with the heating and heat accumulation device 50,
and a second end communicated with the fifth valve port A2 and the
first check valve 60. It can be understood that the throttling
device 70 is an electronic expansion valve or an capillary
tube.
[0045] Further, as illustrated in FIG. 1 to FIG. 4, in the
embodiments, the heat pump system 100 further includes a second
check valve 80, and the second check valve 80 is connected between
the second valve port B1 and the indoor heat exchanger 30.
[0046] In one embodiment, when the heat pump system 100 is in the
first heating mode, the throttling device 70 and the first solenoid
valve 43 are open, the first check valve 60 and the second check
valve 80 are closed, the first valve port A1 and the fourth valve
port D1 of the first four-way valve 41 communicates the exhaust
port 111 of the compressor 11 with the heating and heat
accumulation device 50, the fifth valve port A2 and the sixth valve
port B2 of the second four-way valve 42 communicates the heating
and heat accumulation device 50 with the first solenoid valve 43
and the indoor heat exchanger 30. The gaseous refrigerant with the
high pressure discharged out of the exhaust port 111 of the
compressor 11 is heated in the heating and heat accumulation device
50 (or is condensed to release a part of heat to the heating and
heat accumulation device 50), and then is carried to the indoor
heat exchanger 30 to release heat through the first solenoid valve
43. The liquid refrigerant flowing out of the indoor heat exchanger
30 absorbs heat and evaporates into the gaseous refrigerant in the
outdoor heat exchanger 20, and flows out of the eighth valve port
D2 and the seventh valve port C2 of the second four-way valve 42,
back to the liquid separator 12 through the liquid returning port
112, and further into the compressor 11 again.
[0047] When the heat pump system 100 is in the second heating mode,
the throttling device 70, the first solenoid valve 43 and the first
check valve 60 are closed, the second check valve 80 is open, and
the first valve port A1 and the second valve port B1 of the first
four-way valve 41 communicate the exhaust port 111 of the
compressor 11 with the second check valve 80 and the indoor heat
exchanger 30. The gaseous refrigerant with the high pressure
discharged out of the exhaust port 111 of the compressor 11 flows
to the indoor heat exchanger 30 to release heat through the first
four-way valve 41 and the second check valve 80, to increase the
temperature in the indoor environment. The liquid refrigerant with
the high pressure absorbs heat and evaporates into the gaseous
refrigerant in the outdoor heat exchanger 20, and flows out of the
eighth valve port D2 and the seventh valve port C2 of the second
four-way valve 42, back to the liquid separator 12 through the
liquid returning port 112, and into the compressor 11 again, thus
achieving the normal pure heating mode.
[0048] When the heat pump system 100 is in the defrosting mode, the
throttling device 70, the first check valve 60 and the second check
valve 80 are open, the first solenoid valve 43 is closed, and the
first valve port A1 and the second valve port B1 of the first
four-way valve 41 communicate the exhaust port 111 of the
compressor 11 with the second check valve 80 and the indoor heat
exchanger 30. The gaseous refrigerant with the high pressure
discharged out of the exhaust port 111 of the compressor 11 flows
to the indoor heat exchanger 30 to release heat through the first
four-way valve 41 and the second check valve 80, to increase the
temperature in the indoor environment. The refrigerant continues to
be condensed to release heat in the outdoor heat exchanger 20, to
allow the frost formed on the outdoor heat exchanger 20 to thaw.
The generated liquid refrigerant passes through the first check
valve 60 and the throttling device 70, absorbs heat and evaporates
while passing through the heating and heat accumulation device 40,
and flows back to the liquid separator 12 through the liquid
returning port 112 after passing through the fourth valve port D1
and the third valve port C1 of the first four-way valve 41, and
further into the compressor 11 again, and the heat pump system 100
achieves the defrosting without stopping the heating. During the
defrosting, the indoor temperature keeps not to be decreased, thus
improving the operating energy efficiency and the heating comfort
of the heat pump system 100.
[0049] It can be understood that, in the defrosting mode, the
refrigerant flows from the outdoor heat exchanger 20 to the heating
and heat accumulation device 40 via two flow paths. In a first one
of the two flow paths, the refrigerant flows from the outdoor heat
exchanger 20 to the heating and heat accumulation device 40 via the
first check valve 60 and the throttling device 70. In a second one
of the two flow paths, the refrigerant flows from the outdoor heat
exchanger 20 to the heating and heat accumulation device 40 via the
eighth valve port D2 and the fifth valve port A2 of the second
four-way valve 42, and the throttling device 70. In this process,
due to influences on the two flow paths by the pressure, the
refrigerant generally flows to the heating and heat accumulation
device 40 in the first path, while the second four-way valve 42 is
out of action temporarily.
[0050] When the heat pump system 100 is in the refrigeration mode,
the throttling device 70 and the first check valve 60 are open, the
first check valve 60 and the second check valve 80 are closed, the
first valve port A1 and the fourth valve port D1 of the first
four-way valve 41 communicate the exhaust port 111 of the
compressor 11 with the heating and heat accumulation device 50, the
fifth valve port A2 and the eighth valve port D2 of the second
four-way valve 42 communicate the heating and heat accumulation
device 50 with the outdoor heat exchanger 20, and the sixth valve
port B2 and the seventh valve port C2 of the second four-way valve
42 communicate the indoor heat exchanger 30 with the liquid
returning port 112 of the liquid separator 12. The gaseous
refrigerant with the high pressure discharged out of the exhaust
port 111 of the compressor 11 passes through the first four-way
valve 41, the throttling device 70 and the second four-way valve
42, then flows into the outdoor heat exchanger 20 to be condensed
into the liquid refrigerant with the high pressure, further flows
into the indoor heat exchanger 30 to be throttled and evaporated
into the gaseous refrigerant with the low pressure, and flows out
of the sixth valve port B2 and the seventh valve port C2 of the
second four-way valve 42, back to the liquid separator 12 through
the liquid returning port 112, and into the compressor 11 again,
thus reducing the temperature in the indoor environment.
[0051] Further, as illustrated in FIG. 1 to FIG. 4, in an
embodiment, the heating and heat accumulation device 50 includes a
second solenoid valve, a heat exchanger 52 and a heating assembly
51, the heating assembly 51 is arranged to an outer wall of the
heat exchanger 52, and the heat exchanger 52 is connected in series
with the second solenoid valve and communicated with the switching
device 40. It can be understood that the second solenoid valve is
configured to control operations states of the heat exchanger and
the heating assembly 51. The heating assembly 51 may be an
exogenous heater, and the exogenous heater may be an electric
heating member or a gas heating member.
[0052] In the embodiments, the heating assembly 51 is configured as
the electric heating member, and the electric heating member is
attached to the outer wall of the heat exchanger 52. The electric
heating member is controlled by the second solenoid valve, to heat
the outer wall of the heat exchanger 52, and the refrigerant can
achieve a heat exchange by the heat exchanger 52 when passing
through the heat exchanger 52.
[0053] In another embodiment, the heating and heat accumulation
device 50 includes a second solenoid valve, a heat exchanger 52 and
a heat accumulation assembly (not illustrated), the heat
accumulation assembly may be arranged to an outer wall of the heat
exchanger 52, and the heat exchanger 52 is connected in series with
the second solenoid valve and communicated with the switching
device 40. It can be understood that the second solenoid valve is
configured to control an operation state of the heat exchanger, and
the heat accumulation assembly may be a heat accumulator. The heat
accumulator may use heat accumulation materials for heat exchange.
In one embodiment, the accumulation materials may be phase-change
materials or sensible heat and heat accumulation materials, which
is not limited herein. The heat accumulation assembly uses a heat
accumulation sheet made of the heat accumulation materials, and the
heat accumulation sheet is arranged to the outer wall of the heat
exchanger 52. When the refrigerant with the high temperature has
the heat exchange by the heat exchanger 52, the heat accumulation
sheet accumulates heat by the heat exchanger 52. The heat
accumulated in the heat accumulation sheet is used to evaporate the
liquid refrigerant with the low temperature when the liquid
refrigerant with the low temperature returns to the compressor, to
reduce the refrigerant content in the refrigeration oil returned
from the liquid separator 12, and hence to increase the
refrigeration oil content in the compressor to a safe
concentration, to achieve a normal operation. Thus, the time from
the start-up to the high-frequency operation of the compressor is
reduced, and the start-up speed of the system is increased.
[0054] In a third embodiment, as illustrated in FIG. 1 to FIG. 4,
the heating and heat accumulation device 50 includes a second
solenoid valve, a heat exchanger 52, a heating assembly 51 and a
heat accumulation assembly (not illustrated), the heating assembly
51 and the heat accumulation assembly are arranged to an outer wall
of the heat exchanger 52 and spaced apart from each other, and the
heat exchanger 52 is connected in series with the second solenoid
valve and communicated with the switching device 40.
[0055] In one embodiment, the second solenoid valve is configured
to control operation states of the heat exchanger and the heating
assembly 51. The heating assembly 51 may be an exogenous heater,
and the exogenous heater may be an electric heating member or a gas
heating member. The heat accumulation assembly may be a heat
accumulator. The heat accumulator may use heat accumulation
materials for heat exchange. In one embodiment, the accumulation
materials may be phase-change materials or sensible heat and heat
accumulation materials, which is not limited herein. In the
embodiment, the heating assembly 51 is configured as the electric
heating member, and the electric heating member is attached to the
outer wall of the heat exchanger 52. The electric heating member is
controlled by the second solenoid valve, to heat the outer wall of
the heat exchanger 52, and the refrigerant can achieve a heat
exchange by the heat exchanger 52 when passing through the heat
exchanger 52. The heat accumulation assembly uses a heat
accumulation sheet made of the heat accumulation materials, and the
heat accumulation sheet is arranged to the outer wall of the heat
exchanger 52. When the heating assembly 51 heats the outer wall of
the heat exchanger 52, and the refrigerant has the heat exchange
while passing through the heat exchanger 52, the heat accumulation
sheet also accumulates heat by the heat exchanger 52. Or, when the
refrigerant with the high temperature has the heat exchange by the
heat exchanger 52, the heat accumulation sheet also accumulates
heat by the heat exchanger 52. The heat accumulated in the heat
accumulation sheet is used to evaporate the liquid refrigerant with
the low temperature when the liquid refrigerant with the low
temperature returns to the compressor, to reduce the refrigerant
content in the refrigeration oil returned from the liquid separator
12, and hence to increase the refrigeration oil content in the
compressor to a safe concentration, to achieve a normal operation.
Thus, the time from the start-up to the high-frequency operation of
the compressor is reduced, and the start-up speed of the system is
increased.
[0056] The present disclosure also provides an air conditioner, and
the air conditioner includes a heat pump system 100. Specific
structures of the heat pump system can refer to the above
embodiments.
[0057] The air conditioner of the present disclosure includes the
heat pump system 100. The heat pump system 100 uses the switching
device 40 to switch the different modes of the refrigerant
discharged from the compressor assembly 10, and also uses the
heating and heat accumulation device 50 to cooperate with the
switching device 40, and the heat pump system 100 can achieve the
defrosting without stopping the heating while heating, thus
improving the operating energy efficiency and the heating comfort
of the air conditioner.
* * * * *