CN108775727B - Refrigerating circulation system - Google Patents
Refrigerating circulation system Download PDFInfo
- Publication number
- CN108775727B CN108775727B CN201810746191.4A CN201810746191A CN108775727B CN 108775727 B CN108775727 B CN 108775727B CN 201810746191 A CN201810746191 A CN 201810746191A CN 108775727 B CN108775727 B CN 108775727B
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- Prior art keywords
- heat exchanger
- heat exchange
- refrigeration cycle
- refrigeration
- cycle system
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- 238000005057 refrigeration Methods 0.000 claims abstract description 63
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 31
- 238000004781 supercooling Methods 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 description 24
- 230000001502 supplementing effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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
- F25B43/003—Filters
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The refrigeration cycle system is characterized by comprising a compressor, a first heat exchanger, a refrigeration throttling device, a second heat exchanger and the compressor which are connected in sequence; the system comprises a refrigeration throttling device, a first heat exchange loop and a second heat exchange loop, wherein the first heat exchange loop is connected with the second heat exchange loop in parallel, and the second heat exchange loop is connected with the first heat exchange loop in parallel; the second branch is communicated with a second heat exchange loop of the third heat exchanger through an auxiliary throttling device, and the other end of the second heat exchange loop is communicated with the compressor. The refrigeration cycle system solves the problem that the supercooling degree in the refrigeration system cannot be met in the prior art, and can improve the air suction capacity of the compressor and the supercooling degree of the refrigerant in the evaporator.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigeration cycle system.
Background
The refrigeration cycle is a cycle process in which heat is transferred from a low-temperature object to a high-temperature object by a refrigerant, thereby cooling the object to a temperature lower than the ambient temperature and maintaining the low temperature, and is realized by a refrigeration device. It is known from the second law of thermodynamics that the transfer of heat from a low temperature object to a high temperature object is not possible to proceed automatically and uncompensated, and therefore mechanical (or thermal) energy must be provided to ensure that the entropy of the isolated system, including the low temperature cold source, the high temperature heat source, the power source, is not reduced. The refrigeration cycle is composed of a compression process, a condensation process, an expansion process, and an evaporation process. The method is to repeatedly compress, condense, expand and evaporate the refrigerant in a closed refrigerating system by using a limited refrigerant, and continuously absorb heat and evaporate the refrigerant at an evaporator to cool.
In a refrigeration system, the difference between the saturated liquid temperature corresponding to the condenser condensing pressure and the actual condenser outlet liquid temperature is referred to as the subcooling degree. In engineering, the discharge pressure is generally regarded as approximately the condensing pressure, and the difference between the saturated liquid temperature corresponding to the discharge pressure and the temperature of the condenser outlet liquid is regarded as the supercooling degree. This is approximated because the pressure drop across the condenser is small relative to the evaporator. The difference between the discharge pressure and the true condensing pressure is small, and the error caused by adopting the approximation is negligible.
When the compression refrigeration in the prior art needs to obtain a lower evaporation temperature, the evaporation capacity cannot meet the requirement due to the limitation of the discharge capacity of the compressor, and the supercooling degree of the refrigerant is insufficient.
Disclosure of Invention
Therefore, in order to overcome the problem that the supercooling degree in the refrigeration system cannot be satisfied in the prior art, the refrigeration cycle system capable of improving the suction capacity of the compressor and improving the supercooling degree of the refrigerant in the evaporator is provided.
The design scheme of the invention is as follows:
a refrigeration cycle system comprises a compressor, a first heat exchanger, a refrigeration throttling device, a second heat exchanger and the compressor which are connected in sequence; the system comprises a refrigeration throttling device, a first heat exchange loop and a second heat exchange loop, wherein the first heat exchange loop is connected with the second heat exchange loop in parallel, and the second heat exchange loop is connected with the first heat exchange loop in parallel; the second branch is communicated with a second heat exchange loop of the third heat exchanger through an auxiliary throttling device, and the other end of the second heat exchange loop is communicated with the compressor.
Preferably, the compressor comprises a gas-compensating port, and the second heat exchange circuit is connected to the gas-compensating port.
Preferably, the compressor includes an air outlet and an air return, and the refrigeration cycle system further includes: the four-way valve is characterized in that a first valve port is connected with the air outlet, a second valve port is connected with the first heat exchanger, a third valve port is connected with the air return port, and a fourth valve port is connected with the second heat exchanger; the heating throttling device is arranged between the first heat exchanger and the third heat exchanger; the first bypass branch is connected with the heating throttling device in parallel; the first check valve is communicated with the third heat exchanger in a one-way; the second bypass branch is arranged in parallel with the refrigeration throttling device and comprises a second one-way valve, and the second one-way valve is conducted to the third heat exchanger in a one-way mode.
Preferably, the front ends of the first branch and the second branch are provided with three-way valves for controlling flow distribution.
Preferably, a filtering device is arranged between the three-way valve and the second heat exchanger.
Preferably, a liquid reservoir is arranged between the three-way valve and the second heat exchanger.
Preferably, the filtering device comprises a first filter arranged between the liquid storage device and the three-way valve and a second filter arranged between the liquid storage device and the refrigeration throttling device.
Preferably, a gas-water separation device is arranged in front of the air return port.
Preferably, a liquid viewing mirror connected in series with the heating throttling device is further arranged between the first heat exchanger and the third heat exchanger.
Preferably, the third heat exchanger is a plate heat exchanger.
The technical scheme of the invention has the following advantages:
1. the invention provides a refrigeration cycle system which comprises a compressor, a first heat exchanger, a refrigeration throttling device, a second heat exchanger and the compressor which are sequentially connected; the system comprises a refrigeration throttling device, a first heat exchange loop and a second heat exchange loop, wherein the first heat exchange loop is connected with the second heat exchange loop in parallel, and the second heat exchange loop is connected with the first heat exchange loop in parallel; the second branch is communicated with a second heat exchange loop of the third heat exchanger through an auxiliary throttling device, and the other end of the second heat exchange loop is communicated with the compressor. The normal temperature high pressure liquid refrigerant flowing out of the first heat exchange loop of the third heat exchanger is split into two paths. The first branch is communicated with the refrigeration throttling device to perform refrigeration cycle; the second branch flows through the auxiliary throttling device and then becomes low-temperature low-pressure liquid, and then the low-temperature low-pressure liquid continuously flows into the second heat exchange loop of the third heat exchanger, so that the low-temperature low-pressure liquid is subjected to heat exchange with the normal-temperature high-pressure liquid refrigerant of the first heat exchange loop, the heat of the refrigerant before the branch is absorbed, the temperature of the refrigerant is reduced, the temperature of the refrigerant in the first branch reaching a steady state after a period of time is reduced compared with the original temperature, and the supercooling degree in the whole refrigeration cycle is improved.
2. The invention provides a refrigeration cycle system, wherein a compressor comprises a gas supplementing port, and a second heat exchange loop is connected to the gas supplementing port. The refrigerant in the second heat exchange loop is evaporated in the third heat exchanger to absorb heat and then becomes gas to enter the compressor, so that the displacement of the compressor under fixed output pressure is ensured.
3. The invention provides a refrigeration cycle system, wherein the compressor comprises an air outlet and an air return port, and the refrigeration cycle system further comprises: the device comprises a four-way valve, a heating throttling device, a first bypass branch and a second bypass branch. When the heating function is used, the refrigerant is converted into flow direction through the four-way valve, the high-temperature and high-pressure liquid refrigerant flowing out of the second heat exchanger is split into two paths, one path of the refrigerant is throttled and depressurized through the auxiliary throttling device to be changed into low-temperature and low-pressure liquid refrigerant to flow into the second heat exchange loop of the third heat exchanger, and the other path of the refrigerant enters the first heat exchange loop to exchange heat with the second heat exchange loop and then flows into the heating throttling device to circulate. The check valves on the first bypass branch and the second bypass branch are used for enabling the refrigerant to flow into the refrigeration throttling device and the heating throttling device respectively in the refrigeration and heating processes, and other types of throttling elements can be used for replacing the check valves. The scheme ensures that the system not only has a refrigerating function, but also has a heating function, and the same equipment is used, so that the effect of improving the supercooling degree can be realized.
4. The front ends of the first branch and the second branch are provided with three-way valves for controlling flow distribution. Thereby the flow of the refrigerant in the first branch and the second branch can be adapted to different demands.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a connection structure of a refrigeration cycle system according to the present invention.
Reference numerals illustrate:
1-a compressor; 2-a first heat exchanger; 3-a refrigeration throttling device; 4-a second heat exchanger; 5-a third heat exchanger; 6-an air supplementing port; 7-an air outlet; 8-an air return port; 9-a four-way valve; 10-heating throttling device; 11-a first one-way valve; 12-a second one-way valve; 13-a three-way valve; 14-a first filter; 15-a second filter; 16-a gas-water separation device; 17-a liquid-viewing mirror; 18-a reservoir; 19-auxiliary throttle device.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Fig. 1 shows a schematic connection diagram of a refrigeration cycle system according to an embodiment of the present invention. As shown in the figure, the refrigeration cycle system provided by the invention comprises a compressor 1, a first heat exchanger 2, a refrigeration throttling device 3, a heating throttling device 10, a second heat exchanger 4, a four-way valve 9, a third heat exchanger 5 and an auxiliary throttling device 19. The compressor 1 comprises a gas supplementing port 6, a gas outlet 7 and a gas return port 8. The four-way valve 9 has a first valve port connected with the air outlet 7, a second valve port connected with the first heat exchanger 2, a third valve port connected with the air return port 8, and a fourth valve port connected with the second heat exchanger 4. A heating throttling device 10 is arranged between the first heat exchanger 2 and the third heat exchanger 5, a first bypass branch is arranged in parallel with the heating throttling device 10, and the first bypass branch is provided with a first one-way valve 11 which is in one-way conduction with the third heat exchanger 5; a refrigeration throttling device 3 is arranged between the tee joint and the second heat exchanger 4, a second bypass branch is arranged in parallel with the refrigeration throttling device 3, and the second bypass branch is provided with a second one-way valve 12 which is in one-way conduction with the third heat exchanger 5. The third heat exchanger 5 is a plate heat exchanger, the outlet end of the first heat exchanger 2 is communicated with a first heat exchange loop of the third heat exchanger 5, a first shunt and a second shunt are arranged at the other end of the first heat exchange loop in parallel, and the first shunt is communicated with the refrigeration throttling device 3; the second branch is communicated with a second heat exchange loop of the third heat exchanger 5 through an auxiliary throttling device 19, and the other end of the second heat exchange loop is communicated with a gas supplementing port 6 of the compressor 1. The compressor 1 comprises a gas supplementing port 6, the second heat exchange loop is connected to the gas supplementing port 6, and the refrigerant in the second heat exchange loop is evaporated in the third heat exchanger 5 to absorb heat and then turns into gas to enter the compressor 1, so that the displacement of the compressor 1 under the condition of fixed output pressure is ensured.
As shown in the figure, the single arrow indicates the refrigeration cycle, and the normal temperature and high pressure liquid refrigerant flowing out of the first heat exchange circuit of the third heat exchanger 5 is split into two paths when the refrigeration mode is used. The first branch is communicated with the refrigeration throttling device 3 to perform refrigeration cycle; the second branch flows through the auxiliary throttling device 19 and then becomes low-temperature low-pressure liquid, and then the low-temperature low-pressure liquid continuously flows into the second heat exchange loop of the third heat exchanger 5, so that the heat exchange is carried out between the second branch and the normal-temperature high-pressure liquid refrigerant of the first heat exchange loop, the heat of the refrigerant before the branch is absorbed, the temperature of the refrigerant is reduced, the temperature of the refrigerant in the first branch reaching a steady state after a period of time is reduced compared with the original temperature, and the supercooling degree in the whole refrigeration cycle is improved.
As shown in the figure, double-headed arrows indicate a refrigeration cycle, when the heating function is used, the refrigerant is converted into a flow direction through the four-way valve 9, the high-temperature and high-pressure liquid refrigerant flowing out of the second heat exchanger 4 is split into two paths, one path is throttled and depressurized by the auxiliary throttling device 19 to become a low-temperature and low-pressure liquid refrigerant to flow into the second heat exchange loop of the third heat exchanger 5, and the other path enters the first heat exchange loop to exchange heat with the second heat exchange loop and then flows into the heating throttling device 10 to circulate. The check valves on the first and second bypass branches are used to allow refrigerant to flow into the refrigeration and heating restriction 3 and 10, respectively, during the refrigeration and heating process, and other forms of restriction may be used instead. The scheme ensures that the system not only has a refrigerating function, but also has a heating function, and the same equipment is used, so that the effect of improving the supercooling degree can be realized.
The front ends of the first branch and the second branch are provided with three-way valves 13 for controlling flow distribution. Thereby the flow of the refrigerant in the first branch and the second branch can be adapted to different demands. A filtering device is arranged between the three-way valve 13 and the second heat exchanger 4, and comprises a first filter 14 arranged between the liquid storage 18 and the three-way valve 13 and a second filter 15 arranged between the liquid storage 18 and the refrigeration throttling device 3. A liquid reservoir 18 is arranged between the three-way valve 13 and the second heat exchanger 4. The filter device is preferably provided with a gas-water separator 16 before the return air port 8 to prevent liquid from flowing into the compressor 1. A liquid viewing mirror 17 connected in series with the heating throttling device 10 is also arranged between the first heat exchanger 2 and the third heat exchanger 5.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. A refrigeration cycle system is characterized by comprising a compressor (1), a first heat exchanger (2), a refrigeration throttling device (3), a second heat exchanger (4) and the compressor (1) which are connected in sequence; the heat exchange system further comprises a third heat exchanger (5), wherein the outlet end of the first heat exchanger (2) is communicated with a first heat exchange loop of the third heat exchanger (5), a first shunt and a second shunt are arranged at the other end of the first heat exchange loop in parallel, and the first shunt is communicated with the refrigeration throttling device (3); the second branch is communicated with a second heat exchange loop of the third heat exchanger (5) through an auxiliary throttling device (19), and the other end of the second heat exchange loop is communicated with the compressor (1).
2. Refrigeration cycle system according to claim 1, characterized in that the compressor (1) comprises a make-up port (6), the second heat exchange circuit being connected to the make-up port (6).
3. Refrigeration cycle system according to claim 1, wherein the compressor (1) comprises an air outlet (7) and an air return (8), the refrigeration cycle system further comprising:
the four-way valve (9) is characterized in that a first valve port is connected with the air outlet (7), a second valve port is connected with the first heat exchanger (2), a third valve port is connected with the air return port (8), and a fourth valve port is connected with the second heat exchanger (4);
a heating throttling device (10) arranged between the first heat exchanger (2) and the third heat exchanger (5);
the first bypass branch is arranged in parallel with the heating throttling device (10); comprises a first one-way valve (11), wherein the first one-way valve (11) is in one-way conduction with the third heat exchanger (5);
the second bypass branch is arranged in parallel with the refrigeration throttling device (3) and comprises a second one-way valve (12), and the second one-way valve (12) is in one-way conduction to the third heat exchanger (5).
4. A refrigeration cycle system according to any one of claims 1-3, characterized in that the front ends of the first and second branches are provided with a three-way valve (13) controlling flow distribution.
5. Refrigeration cycle system according to claim 4, characterized in that a filtering device is provided between the three-way valve (13) and the second heat exchanger (4).
6. Refrigeration cycle system according to claim 5, characterized in that a reservoir (18) is provided between the three-way valve (13) and the second heat exchanger (4).
7. Refrigeration cycle system according to claim 6, characterized in that the filtering means comprise a first filter (14) arranged between the reservoir (18) and the three-way valve (13) and a second filter (15) arranged between the reservoir (18) and the refrigeration restriction device (3).
8. A refrigeration cycle system according to claim 3, wherein the return air inlet (8) is preceded by a gas-water separation device (16).
9. A refrigeration cycle system according to claim 3, wherein a liquid-viewing mirror (17) connected in series with the heating throttle device (10) is further provided between the first heat exchanger (2) and the third heat exchanger (5).
10. A refrigeration cycle system according to any one of claims 1-3, wherein the third heat exchanger (5) is a plate heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810746191.4A CN108775727B (en) | 2018-07-09 | 2018-07-09 | Refrigerating circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810746191.4A CN108775727B (en) | 2018-07-09 | 2018-07-09 | Refrigerating circulation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108775727A CN108775727A (en) | 2018-11-09 |
| CN108775727B true CN108775727B (en) | 2023-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810746191.4A Active CN108775727B (en) | 2018-07-09 | 2018-07-09 | Refrigerating circulation system |
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| Country | Link |
|---|---|
| CN (1) | CN108775727B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2011357097A1 (en) * | 2011-01-26 | 2013-06-20 | Mitsubishi Electric Corporation | Air-conditioning apparatus |
| CN106766365A (en) * | 2016-11-28 | 2017-05-31 | 广东美的暖通设备有限公司 | Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning |
| CN107024022A (en) * | 2016-02-01 | 2017-08-08 | 陈则韶 | Cooling/heating water heating machine group of three heat exchangers with circuit in series formula |
| CN208458299U (en) * | 2018-07-09 | 2019-02-01 | 浙江正理生能科技有限公司 | A kind of cooling cycle system |
-
2018
- 2018-07-09 CN CN201810746191.4A patent/CN108775727B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2011357097A1 (en) * | 2011-01-26 | 2013-06-20 | Mitsubishi Electric Corporation | Air-conditioning apparatus |
| CN107024022A (en) * | 2016-02-01 | 2017-08-08 | 陈则韶 | Cooling/heating water heating machine group of three heat exchangers with circuit in series formula |
| CN106766365A (en) * | 2016-11-28 | 2017-05-31 | 广东美的暖通设备有限公司 | Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning |
| CN208458299U (en) * | 2018-07-09 | 2019-02-01 | 浙江正理生能科技有限公司 | A kind of cooling cycle system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108775727A (en) | 2018-11-09 |
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