CN112762635A - Refrigerant circulating refrigeration system and refrigerant circulating method thereof - Google Patents
Refrigerant circulating refrigeration system and refrigerant circulating method thereof Download PDFInfo
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- CN112762635A CN112762635A CN202110150123.3A CN202110150123A CN112762635A CN 112762635 A CN112762635 A CN 112762635A CN 202110150123 A CN202110150123 A CN 202110150123A CN 112762635 A CN112762635 A CN 112762635A
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- refrigerant
- stop valve
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- liquid storage
- pressure tank
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 142
- 238000005057 refrigeration Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 89
- 238000001816 cooling Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
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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
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a refrigerant circulating refrigeration system and a refrigerant circulating method thereof, wherein the refrigerant circulating refrigeration system comprises a vacuum pump, a vapor-liquid filter, a negative pressure tank, a first circulating pump, a second circulating pump, a first stop valve, a second stop valve, a third stop valve and a liquid storage tank; the first end of the negative pressure tank is connected with the vacuum pump through a first stop valve, the second end of the negative pressure tank is connected with the first end of the liquid storage tank through a first circulating pump, and the third end of the negative pressure tank is connected with the second end of the liquid storage tank through a second circulating pump; the refrigerant circulating method comprises the following steps: 1) refrigerant refrigeration processing, 2) a forward circulation process of the refrigerant, and 3) a reverse circulation process of the refrigerant. The invention adopts a vacuumizing and cooling mode, can realize the preparation of a large amount of low-temperature refrigerants and meet the requirement of a user on large-area refrigeration and heat exchange; the negative pressure tank is respectively connected with the liquid storage tank through the first circulating pump and the second circulating pump, so that the recycling of refrigerant media can be realized, and the use loss of the media is reduced.
Description
Technical Field
The invention relates to the technical field of refrigeration systems, in particular to a refrigeration system with refrigerant circulation and a refrigerant circulation method thereof.
Background
With the continuous development of science and technology and the increasing improvement of living standard of people, the requirements of people on living quality are higher and higher, when the environmental temperature is uncomfortable, a large number of refrigeration systems are put into use, and meanwhile, various industries have different requirements on the refrigeration systems with various specifications. In the conventional refrigeration systems, freon is used as a refrigerant, and is widely applied to refrigeration equipment and air conditioning equipment due to the characteristics of stable chemical property, non-combustibility, low toxicity, low dielectric constant, high critical temperature, easy liquefaction and the like.
In the prior art, a refrigeration system using water as a refrigerant medium on the market generally comprises a compressor, a condenser and an evaporator, and the refrigerant medium capacity of the system is not high generally, so that high-capacity refrigeration is difficult to realize, and the requirement of a user for large-area refrigeration and heat exchange cannot be met.
Accordingly, the prior art is deficient and needs improvement.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the refrigeration system and the refrigerant circulation method thereof have the advantages of energy conservation, environmental protection, automatic circulation and capability of performing large-area refrigeration.
In order to achieve the purpose, the technical scheme of the invention is as follows: a refrigerant circulating refrigeration system comprises a vacuum pump, a vapor-liquid filter, a negative pressure tank, a first circulating pump, a second circulating pump, a first stop valve, a second stop valve, a third stop valve and a liquid storage tank; the first end of the negative pressure tank is connected with one end of a vapor-liquid filter through a first stop valve, and the other end of the vapor-liquid filter is connected with a vacuum pump;
the second end of the negative pressure tank is connected with one end of a first circulating pump through a second stop valve, and the other end of the first circulating pump is connected with the first end of the liquid storage tank;
the third end of the negative pressure tank is connected with one end of a second circulating pump through a third stop valve, and the other end of the second circulating pump is connected with the second end of the liquid storage tank;
the bottom of the liquid storage tank is provided with a liquid outlet, and the top of the liquid storage tank is provided with a liquid return port.
By adopting the technical scheme, in the refrigerant circulating refrigeration system, the first stop valve, the second stop valve and the third stop valve are all pneumatic stop valves.
By adopting the technical scheme, in the refrigerating system with the refrigerant circulation, the negative pressure tank is internally provided with the refrigerant injection port.
By adopting the technical scheme, in the refrigerating system with the refrigerant circulation, the vacuum gauge is arranged in the negative pressure tank.
By adopting the technical scheme, in the refrigerant circulating refrigeration system, the negative pressure tank is internally provided with the first temperature sensor, and the liquid storage tank is internally provided with the second temperature sensor.
By adopting the technical scheme, the refrigerant circulating refrigeration system further comprises a control unit, and the control unit is electrically connected with the vacuum pump, the first circulating pump, the second circulating pump, the first stop valve, the second stop valve, the third stop valve, the first temperature sensor and the second temperature sensor respectively.
The invention also provides a refrigerant circulating method of the refrigerant circulating refrigeration system, and the specific technical scheme is as follows:
1) refrigerant refrigeration treatment: filling the refrigerant into the negative pressure tank, opening the first stop valve, closing the second stop valve and the third stop valve, starting the vacuum pump to vacuumize the negative pressure tank until the temperature of the refrigerant in the negative pressure tank is reduced to below 5 ℃;
2) the positive cycle process of the refrigerant: opening a second stop valve, closing the first stop valve and the third stop valve, starting a first circulating pump, pumping the cooling refrigerant medium of the negative pressure tank into the liquid storage tank for storage, and discharging the cooling refrigerant medium through a liquid discharge port at the bottom of the liquid storage tank for use as a refrigerant when the cooled refrigerant medium needs to be used;
3) the reverse circulation process of the refrigerant: the refrigerant discharged from the liquid outlet of the liquid storage tank can be heated after heat exchange, refrigeration can not be carried out, the refrigerant heated can flow into the liquid storage tank again from the liquid return port, at the moment, the third stop valve is opened, the first stop valve and the second stop valve are closed, and the second circulating pump is started again to suck back the cold medium heated in the liquid storage tank into the negative pressure tank.
Preferably, the refrigerant medium is refrigerant water.
Preferably, when the temperature of the refrigerant medium in the liquid storage tank is higher than 20 ℃, the second circulating pump is started to suck the refrigerant medium back into the negative pressure tank.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, a large amount of refrigerant medium can be injected into the negative pressure tank, the pressure in the negative pressure tank can be reduced through the vacuum pump, so that the negative pressure state is kept in the negative pressure tank, the refrigerant medium can be cooled in the negative pressure state to obtain low-temperature refrigerant, and the low-temperature refrigerant can be prepared in a large amount by adopting a vacuumizing and cooling mode, so that the requirement of a user on large-area refrigeration and heat exchange is met; the first circulating pump can pump the refrigerant in the negative pressure tank into the liquid storage tank for temporary storage, and when the cooled refrigerant medium needs to be used, the refrigerant can be discharged through the liquid discharge port at the bottom of the liquid storage tank to be used as the refrigerant; the refrigerant discharged from the liquid outlet of the liquid storage tank can be heated after heat exchange, the heated refrigerant can flow into the liquid storage tank again from the liquid return port, the refrigerant is pumped back into the negative pressure tank through the second circulating pump, and the negative pressure tank is respectively connected with the liquid storage tank through the first circulating pump and the second circulating pump, so that the recycling of the refrigerant can be realized, and the use loss of the refrigerant is reduced; the invention adopts water as the refrigerant medium, can effectively reduce the pollution to the environment and has the beneficial effects of energy saving and environmental protection.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
As shown in fig. 1, the present embodiment provides a refrigeration system with refrigerant circulation, which includes a vacuum pump 1, a vapor-liquid filter 2, a negative pressure tank 3, a first circulation pump 41, a second circulation pump 42, a first stop valve 51, a second stop valve 52, a third stop valve 53, and a liquid storage tank 6; wherein, a first end of the negative pressure tank 3 is connected with one end of the vapor-liquid filter 2 through a first stop valve 51, and the other end of the vapor-liquid filter 2 is connected with the vacuum pump 1. In this embodiment, can pour into a large amount of refrigerant media into in the negative pressure jar 3, can reduce the pressure in the negative pressure jar 3 through vacuum pump 1, make jar interior negative pressure state that keeps, refrigerant media can cool down under negative pressure state to obtain the low temperature refrigerant, adopt the mode of evacuation cooling, can realize preparing the low temperature refrigerant in a large number, satisfy the user and need carry out the demand of refrigeration heat transfer by a large scale. The vapor-liquid filter 2 can prevent the refrigerant medium from being sucked out of the vacuum pump 1 when the negative pressure tank 3 is vacuumized.
The second end of the negative pressure tank 3 is connected with one end of the first circulating pump 41 through a second stop valve 52, and the other end of the first circulating pump 41 is connected with the first end of the liquid storage tank 6. In this embodiment, the first circulation pump 41 may pump the refrigerant in the negative pressure tank 3 into the liquid storage tank 6 for temporary storage.
The third end of the negative pressure tank 3 is connected with one end of the second circulating pump 42 through a third stop valve 53, and the other end of the second circulating pump 42 is connected with the second end of the liquid storage tank 6. In this embodiment, the second circulation pump 42 can re-pump the heated refrigerant medium in the liquid storage tank 6 to the negative pressure tank 3.
The bottom of the liquid storage tank 6 is provided with a liquid outlet 61, and the top of the liquid storage tank 6 is provided with a liquid return port 62. In this embodiment, when the cooled refrigerant medium needs to be used, the refrigerant medium can be discharged through the liquid outlet 61 at the bottom of the liquid storage tank 6 to be used as a refrigerant; the refrigerant discharged from the liquid outlet 61 of the liquid storage tank 6 is heated after heat exchange, and the heated refrigerant can flow into the liquid storage tank 6 again from the liquid return port.
Further, the first, second, and third stop valves 51, 52, and 53 are all pneumatic stop valves. In this embodiment, the first stop valve 51, the second stop valve 52, and the third stop valve 53 are pneumatic stop valves, which facilitates the centralized control of the system and eliminates the manual operation complexity.
Further, a refrigerant inlet 31 is provided in the negative pressure tank 3. In this embodiment, the refrigerant injection port 31 is provided to facilitate the user to inject the refrigerant into the negative pressure tank 3.
Further, a vacuum gauge (not shown) is provided in the negative pressure tank 3. In this embodiment, the vacuum gauge is provided to facilitate the user to measure the vacuum degree of the negative pressure tank 3.
Further, a first temperature sensor (not shown) is arranged in the negative pressure tank 3, and a second temperature sensor (not shown) is arranged in the liquid storage tank 6. In this embodiment, the first temperature sensor may monitor the temperature of the refrigerant in the negative pressure tank 3 in real time, and the second temperature sensor may monitor the temperature of the refrigerant in the liquid storage tank 6 in real time.
Further, the system further comprises a control unit, wherein the control unit is electrically connected with the vacuum pump 1, the first circulating pump 41, the second circulating pump 42, the first stop valve 51, the second stop valve 52, the third stop valve 53, the first temperature sensor and the second temperature sensor respectively. In this embodiment, the control unit is electrically connected to the vacuum pump 1, the first circulating pump 41, the second circulating pump 42, the first stop valve 51, the second stop valve 52, the third stop valve 53, the first temperature sensor and the second temperature sensor, respectively, and can be operated in a centralized manner.
Specifically, the refrigerant circulation method of the refrigerant circulation refrigeration system is as follows:
1) refrigerant refrigeration treatment: and (3) filling the refrigerant medium into the negative pressure tank 3, opening the first stop valve 51, closing the second stop valve 52 and the third stop valve 53, and starting the vacuum pump 1 to vacuumize the negative pressure tank 3 until the temperature of the refrigerant medium in the negative pressure tank 3 is reduced to below 5 ℃. In this embodiment, when the vacuum pump 1 performs the vacuum-pumping process on the negative pressure tank 3, the temperature of the refrigerant in the negative pressure tank 3 can be reduced until the temperature is reduced to below 5 ℃ and the refrigerant is used as the refrigerant because the pressure in the negative pressure tank 3 is reduced.
2) The positive cycle process of the refrigerant: the second stop valve 52 is opened, the first stop valve 51 and the third stop valve 53 are closed, the first circulation pump 41 is started, the temperature-reduced refrigerant medium in the negative pressure tank 3 is pumped into the receiver 6 and stored therein, and when the temperature-reduced refrigerant medium needs to be used, the refrigerant can be discharged through the drain port 61 at the bottom of the receiver 6 and used as a refrigerant. In this embodiment, the first circulation pump 41 can pump the refrigerant in the negative pressure tank 3 into the liquid storage tank 6 for temporary storage, and when the first circulation pump 41 is in the working state, the first stop valve 51 and the third stop valve 53 are closed, so as to prevent the external factors from affecting the pumping effect of the first circulation pump 41.
3) The reverse circulation process of the refrigerant: the refrigerant discharged from the liquid outlet 61 of the liquid storage tank 6 is heated after heat exchange, and cannot be cooled, and the heated refrigerant can flow into the liquid storage tank 6 again from the liquid return port 62, at this time, the third stop valve 53 is opened, the first stop valve 51 and the second stop valve 52 are closed, and the second circulation pump 42 is restarted, so that the refrigerant medium heated in the liquid storage tank 6 is pumped back into the negative pressure tank 3. In this embodiment, the second circulation pump 42 can re-pump the warmed refrigerant medium in the liquid storage tank 6 to the negative pressure tank 3, re-pump the warmed refrigerant medium to the negative pressure tank 3, and then perform the negative pressure cooling process on the refrigerant medium by the vacuum pump 1, so as to effectively improve the recycling rate of the refrigerant medium.
Preferably, the refrigerant medium is refrigerant water. In the embodiment, the specific heat capacity of the refrigerant water is large, the heat loss in the medium transmission process is small, the refrigerant water is easy to prepare, the price is low, and the environmental protection performance is good.
Preferably, when the temperature of the refrigerant medium in the reservoir 6 is greater than 20 ℃, the second circulation pump 42 is activated to pump the refrigerant medium back into the suction tank.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, a large amount of refrigerant medium can be injected into the negative pressure tank, the pressure in the negative pressure tank can be reduced through the vacuum pump, so that the negative pressure state is kept in the negative pressure tank, the refrigerant medium can be cooled in the negative pressure state to obtain low-temperature refrigerant, and the low-temperature refrigerant can be prepared in a large amount by adopting a vacuumizing and cooling mode, so that the requirement of a user on large-area refrigeration and heat exchange is met; the first circulating pump can pump the refrigerant in the negative pressure tank into the liquid storage tank for temporary storage, and when the cooled refrigerant medium needs to be used, the refrigerant can be discharged through the liquid discharge port at the bottom of the liquid storage tank to be used as the refrigerant; the refrigerant discharged from the liquid outlet of the liquid storage tank can be heated after heat exchange, the heated refrigerant can flow into the liquid storage tank again from the liquid return port, the refrigerant is pumped back into the negative pressure tank through the second circulating pump, and the negative pressure tank is respectively connected with the liquid storage tank through the first circulating pump and the second circulating pump, so that the recycling of the refrigerant can be realized, and the use loss of the refrigerant is reduced; the invention adopts water as the refrigerant medium, can effectively reduce the pollution to the environment and has the beneficial effects of energy saving and environmental protection.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A refrigerant cycle refrigeration system, characterized in that: the device comprises a vacuum pump, a vapor-liquid filter, a negative pressure tank, a first circulating pump, a second circulating pump, a first stop valve, a second stop valve, a third stop valve and a liquid storage tank; the first end of the negative pressure tank is connected with one end of a vapor-liquid filter through a first stop valve, and the other end of the vapor-liquid filter is connected with a vacuum pump;
the second end of the negative pressure tank is connected with one end of a first circulating pump through a second stop valve, and the other end of the first circulating pump is connected with the first end of the liquid storage tank;
the third end of the negative pressure tank is connected with one end of a second circulating pump through a third stop valve, and the other end of the second circulating pump is connected with the second end of the liquid storage tank;
the bottom of the liquid storage tank is provided with a liquid outlet, and the top of the liquid storage tank is provided with a liquid return port.
2. A refrigeration system of a refrigerant cycle according to claim 1, wherein: the first stop valve, the second stop valve and the third stop valve are all pneumatic stop valves.
3. A refrigeration system of a refrigerant cycle according to claim 1, wherein: and a refrigerant filling opening is formed in the negative pressure tank.
4. A refrigeration system of a refrigerant cycle according to claim 2, wherein: and a vacuum gauge is arranged in the negative pressure tank.
5. A refrigeration system of a refrigerant cycle according to claim 4, wherein: a first temperature sensor is arranged in the negative pressure tank, and a second temperature sensor is arranged in the liquid storage tank.
6. A refrigeration system of a refrigerant cycle according to claim 5, wherein: the vacuum pump, the first circulating pump, the second circulating pump, the first stop valve, the second stop valve, the third stop valve, the first temperature sensor and the second temperature sensor are electrically connected with the control unit respectively.
7. The refrigerant circulation method for a refrigeration system according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
1) refrigerant refrigeration treatment: filling the refrigerant into the negative pressure tank, opening the first stop valve, closing the second stop valve and the third stop valve, starting the vacuum pump to vacuumize the negative pressure tank until the temperature of the refrigerant in the negative pressure tank is reduced to below 5 ℃;
2) the positive cycle process of the refrigerant: opening a second stop valve, closing the first stop valve and the third stop valve, starting a first circulating pump, pumping the cooling refrigerant medium of the negative pressure tank into the liquid storage tank for storage, and discharging the cooling refrigerant medium through a liquid discharge port at the bottom of the liquid storage tank for use as a refrigerant when the cooled refrigerant medium needs to be used;
3) the reverse circulation process of the refrigerant: the refrigerant discharged from the liquid outlet of the liquid storage tank can be heated after heat exchange, refrigeration can not be carried out, the refrigerant heated can flow into the liquid storage tank again from the liquid return port, at the moment, the third stop valve is opened, the first stop valve and the second stop valve are closed, and the second circulating pump is started again to suck back the cold medium heated in the liquid storage tank into the negative pressure tank.
8. A refrigeration system of a refrigerant cycle according to claim 7, wherein: the refrigerant medium is refrigerant water.
9. A refrigeration system of a refrigerant cycle according to claim 7, wherein: when the temperature of the refrigerant medium in the liquid storage tank is higher than 20 ℃, the second circulating pump is started to suck the refrigerant medium back into the negative pressure tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110150123.3A CN112762635A (en) | 2021-02-03 | 2021-02-03 | Refrigerant circulating refrigeration system and refrigerant circulating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110150123.3A CN112762635A (en) | 2021-02-03 | 2021-02-03 | Refrigerant circulating refrigeration system and refrigerant circulating method thereof |
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| CN112762635A true CN112762635A (en) | 2021-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110150123.3A Pending CN112762635A (en) | 2021-02-03 | 2021-02-03 | Refrigerant circulating refrigeration system and refrigerant circulating method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5333677A (en) * | 1974-04-02 | 1994-08-02 | Stephen Molivadas | Evacuated two-phase head-transfer systems |
| JP2006300457A (en) * | 2005-04-22 | 2006-11-02 | Honda Motor Co Ltd | Accumulator for refrigerating cycle |
| CN103122778A (en) * | 2011-11-21 | 2013-05-29 | 忻元敏 | Self-generation system utilizing man-made cold source |
| CN210320439U (en) * | 2019-06-20 | 2020-04-14 | 武汉策尔曼自动化设备有限公司 | Cold-storage central air conditioner with power generation function |
-
2021
- 2021-02-03 CN CN202110150123.3A patent/CN112762635A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5333677A (en) * | 1974-04-02 | 1994-08-02 | Stephen Molivadas | Evacuated two-phase head-transfer systems |
| JP2006300457A (en) * | 2005-04-22 | 2006-11-02 | Honda Motor Co Ltd | Accumulator for refrigerating cycle |
| CN103122778A (en) * | 2011-11-21 | 2013-05-29 | 忻元敏 | Self-generation system utilizing man-made cold source |
| CN210320439U (en) * | 2019-06-20 | 2020-04-14 | 武汉策尔曼自动化设备有限公司 | Cold-storage central air conditioner with power generation function |
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Application publication date: 20210507 |
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