CN114413500A - Air-cooled heat pump heat exchange system and control method thereof - Google Patents
Air-cooled heat pump heat exchange system and control method thereof Download PDFInfo
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- CN114413500A CN114413500A CN202011076364.XA CN202011076364A CN114413500A CN 114413500 A CN114413500 A CN 114413500A CN 202011076364 A CN202011076364 A CN 202011076364A CN 114413500 A CN114413500 A CN 114413500A
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 94
- 238000000926 separation method Methods 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 description 12
- 239000003507 refrigerant Substances 0.000 description 11
- 239000012530 fluid Substances 0.000 description 10
- 238000001816 cooling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention relates to the technical field of heat exchange, in particular to an air-cooled heat pump heat exchange system and a control method thereof. The air-cooled heat pump heat exchange system comprises a heat exchange circulation path, a compressor, a reversing valve and a gas-liquid separation path; the compressor, the reversing valve and the gas-liquid separation path are arranged on the heat exchange circulation path in series, and the gas-liquid separation path is arranged between an air suction port of the compressor and the reversing valve; the air-cooled heat pump heat exchange system also comprises a control valve flow path; the control valve flow path is connected with the gas-liquid separation path in parallel and is arranged between the air suction port of the compressor and the reversing valve; when the air-cooled heat pump heat exchange system is in a first state, the flow path of the control valve is closed, and a medium flowing out through the reversing valve returns to the compressor through the gas-liquid separation path; when the air-cooled heat pump heat exchange system is in the second state, the flow path of the control valve is opened, and the gaseous medium flowing out through the reversing valve directly returns to the compressor through the flow path of the control valve. The invention has the advantages that: the unit has high performance and small temperature loss and can prevent liquid return.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to an air-cooled heat pump heat exchange system and a control method thereof.
Background
The air-cooled heat pump heat exchange system is applied to a water heater or other devices needing heat exchange and is used for exchanging heat for water to obtain needed hot water or cold water.
The common air-cooled heat pump heat exchange system comprises a heat exchange circulation path, a heat exchanger, a gas-liquid separator and a reversing valve, wherein the heat exchanger is used for exchanging heat with the outside; the gas-liquid separator is arranged between the reversing valve and the air suction port of the compressor and used for preventing the compressor from being damaged due to liquid return.
However, liquid return is rarely caused in a refrigerating state, and the existence of the gas-liquid separator on the heat exchange circulation path easily causes the loss of the suction evaporation temperature of the compressor due to the pressure drop of the gas-liquid separator in the refrigerating state, so that the performance of the unit is reduced in the refrigerating state; and moreover, not all heating states can cause unit liquid return, the unit liquid return can be caused under the conditions that the working condition is suddenly changed and the throttling device is not adjusted in time, most stable heating states cannot cause the unit liquid return, and the existence of the gas-liquid separator can inevitably cause the unit heating performance to be reduced due to the existence of self pressure drop.
Disclosure of Invention
In view of the above, it is desirable to provide an air-cooled heat pump heat exchange system with high unit performance, low temperature loss and capability of preventing liquid return, and a control method thereof.
In order to solve the technical problem, the application provides the following technical scheme:
an air-cooled heat pump heat exchange system comprises a heat exchange circulation path, a compressor, a reversing valve and a gas-liquid separation path; the compressor, the reversing valve and the gas-liquid separation path are arranged on the heat exchange circulation path in series, and the gas-liquid separation path is arranged between the air suction port of the compressor and the reversing valve; the air-cooled heat pump heat exchange system also comprises a control valve flow path; the control valve flow path is connected with the gas-liquid separation path in parallel, and is arranged between the air suction port of the compressor and the reversing valve;
when the air-cooled heat pump heat exchange system is in a first state, the flow path of the control valve is closed, and a medium flowing out through the reversing valve returns to the compressor through the gas-liquid separation path;
when the air-cooled heat pump heat exchange system is in a second state, the flow path of the control valve is opened, and the gaseous medium flowing out of the reversing valve directly returns to the compressor through the flow path of the control valve.
In the application, a control valve flow path is connected in parallel with a gas-liquid separation path, and the control valve flow path is arranged between a gas suction port of a compressor and a reversing valve; in a refrigeration or heating mode, when a first state is detected, the flow path of the control valve is closed, so that the refrigerant can only enter the gas-liquid separation path for full separation, liquid return is prevented, and the compressor unit is protected; when the compressor is detected to be in the second state, the control valve flow path circulates, so that the medium refrigerant can directly return to the suction port of the compressor through the control valve flow path, and the performance of the unit is improved; and the phenomenon that the refrigerant still enters the gas-liquid separation path in the second state, and extra evaporation temperature loss is caused due to the pressure drop of the gas-liquid separation path, so that the performance of the unit is greatly reduced is avoided.
In one embodiment, the control valve flow path is provided with a solenoid valve for controlling the opening or closing of the control valve flow path.
When the air-cooled heat pump heat exchange system detects that the air-cooled heat pump heat exchange system is in the first state, the electromagnetic valve is controlled to be closed, the flow path of the control valve is closed, and a medium flowing out through the reversing valve returns to the compressor through the gas-liquid separation path; when the air-cooled heat pump heat exchange system detects that the air-cooled heat pump heat exchange system is in the second state, the electromagnetic valve is controlled to be opened, the flow path of the control valve is opened, and the medium flowing out through the reversing valve directly returns to the compressor through the flow path of the control valve.
In one embodiment, a gas-liquid separator is arranged on the gas-liquid separation path and used for separating gas and liquid media in the heat exchange circulation path.
So set up, vapour and liquid separator is used for the separation of gas-liquid medium in the heat transfer circulation way.
In one embodiment, the air-cooled heat pump heat exchange system further comprises a first heat exchanger, and the first heat exchanger, the compressor and the reversing valve are arranged in the heat exchange circulation path in series and used for exchanging heat with the outside.
So set up, first heat exchanger is used for carrying out the heat transfer with the external world, under the heating mode, plays the effect of evaporimeter, under the cooling mode, plays the effect of condenser.
In one embodiment, the air-cooled heat pump heat exchange system further comprises a second heat exchanger, and the second heat exchanger is arranged in the heat exchange circulation path in series with the compressor and the reversing valve and is used for exchanging heat with water.
So set up, the second heat exchanger is used for exchanging heat with water, supplies hot water or cold water for required place.
In one embodiment, the air-cooled heat pump heat exchange system further comprises a throttling element, the throttling element is arranged in the heat exchange circulation path in series with the first heat exchanger and the reversing valve, and the throttling element is arranged between the first heat exchanger and the second heat exchanger.
So arranged, the throttling element is used for converting the medium state into a low-temperature and low-pressure medium.
In one embodiment, the throttling element is an electronic expansion valve or a thermal expansion valve.
So set up, connect convenient with low costs, and can play the same throttle effect.
In one embodiment, the reversing valve is a four-way valve.
So set up, the cross valve is comparatively convenient at the switching flow path when using under refrigeration mode and the mode of heating.
In one embodiment, the number of the first heat exchangers is multiple, and the multiple first heat exchangers are arranged in the heat exchange circulation path in series.
So set up, increase the quantity of first heat exchanger and can increase heat transfer area and heat exchange efficiency.
The application also provides a control method, which is realized based on an air-cooled heat pump heat exchange system, wherein the air-cooled heat pump heat exchange system comprises an electromagnetic valve, a control valve flow path, a gas-liquid separation path, a gas-liquid separator, a compressor and a reversing valve;
when the air-cooled heat pump heat exchange system detects that the air-cooled heat pump heat exchange system is in a first state, the electromagnetic valve is closed, the flow path of the control valve is closed, a medium flowing out of the reversing valve enters a gas-liquid separator in the gas-liquid separation path, and the medium returns to the compressor after being separated by the gas-liquid separator; when the air-cooled heat pump heat exchange system detects that the air-cooled heat pump heat exchange system is in a second state, the electromagnetic valve is opened, the control valve flow path is enabled to circulate, and a medium flowing out through the reversing valve directly returns to the compressor through the control valve flow path.
Compared with the prior art, the air-cooled heat pump heat exchange system provided by the application has the advantages that the control valve flow path is connected with the gas-liquid separation path in parallel, and is arranged between the air suction port of the compressor and the reversing valve; in a refrigeration or heating mode, when a first state is detected, the flow path of the control valve is closed, so that the refrigerant can only enter the gas-liquid separation path for full separation, liquid return is prevented, and a protection effect is achieved; when the compressor is detected to be in the second state, the control valve flow path circulates, so that the medium refrigerant can directly return to the suction port of the compressor through the control valve flow path, and the performance of the unit is improved; the refrigerant also enters the gas-liquid separation path under the normal state, and extra evaporation temperature loss is avoided due to the pressure drop of the gas-liquid separation path, so that the unit performance is greatly reduced.
Drawings
Fig. 1 is a schematic diagram of a heat exchange system of an air-cooled heat pump provided by the present application.
Fig. 2 is a schematic view of an air-cooled heat pump heat exchange system in a refrigeration mode provided by the present application.
Fig. 3 is a schematic view of an air-cooled heat pump heat exchange system in a heating mode provided in the present application.
In the figure, 100, an air-cooled heat pump heat exchange system; 10. a heat exchange circulation path; 20. a compressor; 30. a diverter valve; 40. a gas-liquid separation path; 41. a gas-liquid separator; 50. a control valve flow path; 51. an electromagnetic valve; 60. a first heat exchanger; 70. a second heat exchanger; 80. a throttling element; 90. a water inlet pipe; 91. and (5) discharging a water pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 3, the present invention provides an air-cooled heat pump heat exchange system 100, where the air-cooled heat pump heat exchange system 100 is applied to a water heater or other devices that need heat exchange to supply water, and is used to heat or cool water.
Referring to fig. 1, fig. 1 is a schematic view of an air-cooled heat pump heat exchange system 100 according to an embodiment of the present invention, where the air-cooled heat pump heat exchange system 100 includes a heat exchange circulation path 10, a compressor 20, a reversing valve 30, and a gas-liquid separation path 40; the compressor 20, the reversing valve 30 and the gas-liquid separation path 40 are arranged on the heat exchange circulation path 10 in series, the gas-liquid separation path 40 is arranged between an air suction port of the compressor 20 and the reversing valve 30, and the gas-liquid separation path 40 is used for carrying out gas-liquid separation on a medium to obtain a required gaseous medium;
further, the air-cooled heat pump heat exchange system 100 further includes a control valve flow path 50; the control valve flow path 50 is connected in parallel with the gas-liquid separation path 40, the control valve flow path 50 is arranged between the air suction port of the compressor 20 and the reversing valve 30, and the control valve flow path 50 can be opened or closed in different states detected by the air-cooled heat pump heat exchange system 100 to allow or block the circulation of the medium; when the air-cooled heat pump heat exchange system 100 is in the first state, the control valve flow path 50 is closed, and the medium flowing out through the reversing valve 30 returns to the compressor 20 through the gas-liquid separation circuit 40; when the air-cooled heat pump heat exchange system 100 is in the second state, the control valve flow path 50 is opened, and the medium flowing out through the reversing valve 30 directly returns to the compressor 20 through the control valve flow path 50.
The first state is a liquid return state of the compressor 20, that is, the refrigerant gas returned to the compressor 20 is mixed with liquid; in this embodiment, in this state, the temperature of the exhaust superheat degree is determined by installing a temperature sensor and a pressure sensor at the air outlet of the compressor 20 of the air-cooled heat pump heat exchange system 100, and when the exhaust superheat degree is greater than or equal to a set temperature value, it is determined that the air-cooled heat pump heat exchange system 100 is in the first state, and the control valve flow path 50 is closed; in this embodiment, the set temperature value is 15 ℃, and of course, in other embodiments, different temperature values may be set according to different unit conditions and operating environments, for example, the temperature values may also be 15.5 ℃, 16 ℃, 16.5 ℃, 17 ℃, and the like;
it should be noted that the second state refers to a normal state of the compressor 20, that is, the compressor 20 is not in a liquid return state, that is, the refrigerant gas returned to the compressor 20 is not mixed with liquid; at this time, when the exhaust superheat degree is smaller than the set temperature value, it is determined that the air-cooled heat pump heat exchange system 100 is in the second state, and the control valve flow path 50 is opened;
in other embodiments, it may also be determined whether the air-cooled heat pump heat exchange system 100 is in the first state or the second state by other manners, for example, a temperature sensor and a pressure sensor may be installed at the air suction port of the compressor 20 to determine the temperature of the suction superheat degree, and when the suction superheat degree is greater than or equal to a set temperature value, it is determined that the air-cooled heat pump heat exchange system 100 is in the first state, and the control valve flow path 50 is closed; when the suction superheat degree is smaller than the set temperature value, the air-cooled heat pump heat exchange system 100 is judged to be in the second state, and the control valve flow path 50 is opened; or, a temperature sensor may be installed at the air outlet of the compressor 20 to determine the exhaust temperature of the compressor 20, and when the exhaust temperature is greater than or equal to a set temperature value, it is determined that the air-cooled heat pump heat exchange system 100 is in the first state, and the control valve flow path 50 is closed; when the exhaust temperature is lower than the set temperature value, it is determined that the air-cooled heat pump heat exchange system 100 is in the second state, and the control valve flow path 50 is opened.
In the cooling mode or the heating mode, when the first state is detected, the control valve flow path 50 is closed, so that the refrigerant can only enter the gas-liquid separation path 40 for sufficient separation, liquid return is prevented, and the function of protecting the compressor 20 unit is achieved; when the second state is detected, the control valve flow path 50 circulates, so that the gaseous refrigerant can directly return to the suction port of the compressor 20 through the control valve flow path 50, and the unit performance is improved; the phenomenon that the refrigerant enters the gas-liquid separation path 40 under the condition is avoided, extra evaporation temperature loss is caused due to the pressure drop of the gas-liquid separation path 40, and the performance of the unit is greatly reduced.
Preferably, in the present application, the reversing valve 30 is a four-way valve, and it is convenient to switch the flow path when the four-way valve is used in the cooling mode and the heating mode. Of course, in other embodiments, the directional valve 12 may also be a five-way valve, which may be set according to system requirements.
Specifically, the gas-liquid separation path 40 is provided with a gas-liquid separator 41, and the gas-liquid separator 41 is used for separating gas and liquid media in the heat exchange circulation path 10, so as to play a role in protecting liquid return prevention; when the first state is detected, the gas-liquid mixture flows into the gas-liquid separator 41 and is separated, and the gaseous medium obtained after separation is discharged to prevent liquid return.
Specifically, the control valve flow path 50 is provided with an electromagnetic valve 51 for controlling the opening or closing of the control valve flow path 50; when the air-cooled heat pump heat exchange system 100 detects that the air-cooled heat pump heat exchange system is in the first state, the electromagnetic valve 51 is controlled to be closed, the control valve flow path 50 is closed, and the medium flowing out through the reversing valve 30 returns to the compressor 20 through the gas-liquid separation circuit 40; when the air-cooled heat pump heat exchange system 100 detects that the air-cooled heat pump heat exchange system is in the second state, the electromagnetic valve 51 is controlled to be opened, the control valve flow path 50 is opened, and the medium flowing out through the reversing valve 30 directly returns to the compressor 20 through the control valve flow path 50.
As shown in fig. 1-3, the air-cooled heat pump heat exchange system 100 further includes a first heat exchanger 60, the first heat exchanger 60 is disposed in the heat exchange circulation path 10 in series with the compressor 20 and the reversing valve 30 for exchanging heat with the outside, and functions as an evaporator in the heating mode and as a condenser in the cooling mode.
Preferably, the number of the first heat exchangers 60 is multiple, and the multiple first heat exchangers 60 are arranged in the heat exchange circulation path 10 in series, it can be understood that the multiple first heat exchangers 60 arranged in series can increase the heat exchange area and improve the heat exchange efficiency; preferably, in the present application, the number of the first heat exchangers 60 is two, but of course, in other embodiments, the number of the first heat exchangers 60 may be other numbers, such as three, four or five.
Further, the air-cooled heat pump heat exchange system 100 further includes a second heat exchanger 70, and the second heat exchanger 70 is disposed in the heat exchange circulation path 10 in series with the compressor 20 and the reversing valve 30, and is configured to exchange heat with water and supply hot water or cold water to a desired place.
Further, the air-cooled heat pump heat exchange system 100 further includes a throttling element 80, the throttling element 80 is arranged in the heat exchange circulation path 10 in series with the first heat exchanger 60 and the reversing valve 30, and the throttling element 80 is arranged between the first heat exchanger 60 and the second heat exchanger 70, and is used for throttling and converting the medium state into a low-temperature and low-pressure medium.
Preferably, in the present embodiment, the throttling element 80 is an electronic expansion valve, which is not only convenient to connect, low in cost, but also good in throttling effect. Of course, in other embodiments, the throttling element 80 may also be a thermal expansion valve or the like that is capable of performing the same function as the throttling element 80.
Further, the air-cooled heat pump heat exchange system 100 further comprises a water inlet pipe 90 and a water outlet pipe 91, the water inlet pipe 90 and the water outlet pipe 91 are respectively connected with the second heat exchanger 70, and water in the water inlet pipe 90 flows out of the water outlet pipe 91 after exchanging heat with the second heat exchanger 70, so that corresponding hot water or cold water is obtained.
The application also provides a control method, which is realized based on the air-cooled heat pump heat exchange system 100, wherein the air-cooled heat pump heat exchange system 100 comprises an electromagnetic valve 51, a control valve flow path 50, a gas-liquid separation path 40, a gas-liquid separator 41, a compressor 20 and a reversing valve 30; when the air-cooled heat pump heat exchange system 100 detects that the air-cooled heat pump heat exchange system is in the first state, the electromagnetic valve 51 is closed, the control valve flow path 50 is closed, the medium flowing out through the reversing valve 30 enters the gas-liquid separator 41 in the gas-liquid separation path 40, is separated by the gas-liquid separator 41 and then returns to the compressor 20; when the air-cooled heat pump heat exchange system 100 detects that the state is in the second state, the electromagnetic valve 51 is opened to circulate the control valve flow path 50, and the gaseous medium flowing out through the reversing valve 30 directly returns to the compressor 20 through the control valve flow path 50.
As shown in fig. 2, fig. 2 shows the medium flowing direction in the cooling mode, when the air-cooled heat pump heat exchange system 100 detects that the heat exchange system is in the first state, the electromagnetic valve 51 is closed, the flow path of the electromagnetic valve 51 is closed, the low-temperature and low-pressure fluid medium in the heat exchange circulation path 10 directly flows into the gas-liquid separator 41 through the four-way valve, the gas-liquid separator 41 performs gas-liquid separation, the obtained low-temperature and low-pressure gaseous fluid medium flows into the suction port of the compressor 20 again, the high-temperature and high-pressure fluid medium flowing out from the outlet of the compressor 20 enters the first heat exchanger 60 to release heat to obtain the low-temperature fluid medium, and then enters the second heat exchanger 70 to perform heat exchange, so that the cold water is discharged from the water outlet pipe 91.
When the air-cooled heat pump heat exchange system 100 detects that the air-cooled heat pump heat exchange system is in the second state, the electromagnetic valve 51 is opened, and the electromagnetic valve 51 is made to flow through a flow path; the low-pressure gaseous medium in the heat exchange circulation path 10 directly flows into the flow path of the solenoid valve 51 through the four-way valve, and then flows into the suction port of the compressor 20, the high-temperature high-pressure fluid medium flowing out from the air outlet of the compressor 20 enters the first heat exchanger 60 to release heat to obtain the low-temperature fluid medium, and then enters the second heat exchanger 70 to exchange heat, so that the cold water is discharged from the water outlet pipe 91.
As shown in fig. 3, fig. 3 shows the medium flowing direction in the heating mode, when the air-cooled heat pump heat exchange system 100 detects that the heat exchange system is in the first state, the electromagnetic valve 51 is closed, the flow path of the electromagnetic valve 51 is closed, the low-temperature and low-pressure fluid medium in the heat exchange circulation path 10 directly flows into the air-liquid separator 41 through the four-way valve, the air-liquid separator 41 performs gas-liquid separation, the obtained low-temperature and low-pressure gaseous fluid medium flows into the air inlet of the compressor 20 again, and the high-temperature and high-pressure fluid medium flowing out from the air outlet of the compressor 20 enters the second heat exchanger 70 for heat exchange, so that the water outlet pipe 91 discharges hot water.
When the air-cooled heat pump heat exchange system 100 detects that the air-cooled heat pump heat exchange system is in the second state, the electromagnetic valve 51 is opened, and the electromagnetic valve 51 is made to flow through a flow path; the low-temperature gaseous medium flowing out of the first heat exchanger 60 in the heat exchange circulation path 10 directly flows into the flow path of the solenoid valve 51 through the four-way valve, then flows into the suction port of the compressor 20, and the high-temperature high-pressure fluid medium flowing out of the air outlet of the compressor 20 enters the second heat exchanger 70 for heat exchange, so that the hot water is discharged from the water outlet pipe 91.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.
Claims (10)
1. An air-cooled heat pump heat exchange system comprises a heat exchange circulation path, a compressor, a reversing valve and a gas-liquid separation path; the compressor, the reversing valve and the gas-liquid separation path are arranged on the heat exchange circulation path in series, and the gas-liquid separation path is arranged between the air suction port of the compressor and the reversing valve;
the air-cooled heat pump heat exchange system is characterized by further comprising a control valve flow path; the control valve flow path is connected with the gas-liquid separation path in parallel, and is arranged between the air suction port of the compressor and the reversing valve;
when the air-cooled heat pump heat exchange system is in a first state, the flow path of the control valve is closed, and a medium flowing out through the reversing valve returns to the compressor through the gas-liquid separation path;
when the air-cooled heat pump heat exchange system is in a second state, the flow path of the control valve is opened, and the gaseous medium flowing out of the reversing valve directly returns to the compressor through the flow path of the control valve.
2. The air-cooled heat pump heat exchange system according to claim 1, wherein the control valve flow path is provided with an electromagnetic valve for controlling the opening or closing of the control valve flow path.
3. The air-cooled heat pump heat exchange system according to claim 1, wherein a gas-liquid separator is arranged on the gas-liquid separation path, and the gas-liquid separator is used for separating gas and liquid media in the heat exchange circulation path.
4. The air-cooled heat pump heat exchange system according to claim 1, further comprising a first heat exchanger, wherein the first heat exchanger is arranged in the heat exchange circulation path in series with the compressor and the reversing valve, and is used for exchanging heat with the outside.
5. The air-cooled heat pump heat exchange system according to claim 4, further comprising a second heat exchanger, wherein the second heat exchanger is arranged in the heat exchange circulation path in series with the compressor and the reversing valve, and is used for exchanging heat with water.
6. The air-cooled heat pump heat exchange system of claim 5, further comprising a throttling element, wherein the throttling element is arranged in the heat exchange circulation path in series with the first heat exchanger and the reversing valve, and the throttling element is arranged between the first heat exchanger and the second heat exchanger.
7. The air-cooled heat pump heat exchange system of claim 6, wherein the throttling element is an electronic expansion valve or a thermostatic expansion valve.
8. The air-cooled heat pump heat exchange system of claim 1, wherein the reversing valve is a four-way valve.
9. The air-cooled heat pump heat exchange system according to claim 4, wherein the number of the first heat exchangers is plural, and the plural first heat exchangers are arranged in the heat exchange circulation path in series.
10. A control method is realized based on an air-cooled heat pump heat exchange system and is characterized in that the air-cooled heat pump heat exchange system comprises an electromagnetic valve, a control valve flow path, a gas-liquid separation path, a gas-liquid separator, a compressor and a reversing valve;
when the air-cooled heat pump heat exchange system detects that the air-cooled heat pump heat exchange system is in a first state, the electromagnetic valve is closed, the flow path of the control valve is closed, a medium flowing out of the reversing valve enters a gas-liquid separator in the gas-liquid separation path, and the medium returns to the compressor after being separated by the gas-liquid separator;
when the air-cooled heat pump heat exchange system detects that the air-cooled heat pump heat exchange system is in a second state, the electromagnetic valve is opened, the control valve flow path is enabled to circulate, and a medium flowing out through the reversing valve directly returns to the compressor through the control valve flow path.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011076364.XA CN114413500A (en) | 2020-10-10 | 2020-10-10 | Air-cooled heat pump heat exchange system and control method thereof |
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| CN202011076364.XA CN114413500A (en) | 2020-10-10 | 2020-10-10 | Air-cooled heat pump heat exchange system and control method thereof |
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| CN (1) | CN114413500A (en) |
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| KR20060038287A (en) * | 2004-10-29 | 2006-05-03 | 엘지전자 주식회사 | The cool air and refrigrant supply system of a refrigerator with liquid separator bypass valve |
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