CN109855323A - Refrigeration system is subcooled in injecting type - Google Patents
Refrigeration system is subcooled in injecting type Download PDFInfo
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- CN109855323A CN109855323A CN201910233306.4A CN201910233306A CN109855323A CN 109855323 A CN109855323 A CN 109855323A CN 201910233306 A CN201910233306 A CN 201910233306A CN 109855323 A CN109855323 A CN 109855323A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 82
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000004781 supercooling Methods 0.000 claims description 37
- 239000012530 fluid Substances 0.000 claims description 28
- 238000001704 evaporation Methods 0.000 claims description 23
- 230000008020 evaporation Effects 0.000 claims description 22
- 230000008676 import Effects 0.000 claims description 22
- 239000007921 spray Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 32
- 239000003507 refrigerant Substances 0.000 abstract description 27
- 238000000034 method Methods 0.000 abstract description 15
- 239000007789 gas Substances 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 8
- 239000002918 waste heat Substances 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
本发明公开了一种喷射式过冷制冷系统，旨在提供一种能够获得较大的过冷度，运行成本低的制冷系统。包括主制冷循环和喷射式过冷制冷循环，所述主制冷循环中的压缩机排气口高温气体的冷却热驱动所述喷射式过冷制冷循环中的喷射器。该制冷系统能够获得较大的过冷度，利用压缩机排气口高温气体的冷却热加热发生器中高压制冷剂液体，使得喷射式过冷循环有效的利用了余热，无其它能源输入，降低了运行成本。同时，进入主冷凝器的制冷剂有较低的温度，降低了占用冷凝器的空间，冷却过程更充分，可以有效的提高系统的能效和压缩机的使用寿命。
The invention discloses a jet-type subcooling refrigeration system, aiming to provide a refrigeration system capable of obtaining a large subcooling degree and low operating cost. It includes a main refrigeration cycle and an ejector-type subcooling refrigeration cycle, and the cooling heat of the high-temperature gas at the compressor discharge port in the main refrigeration cycle drives the ejector in the ejector-type subcooling refrigeration cycle. The refrigeration system can obtain a large degree of subcooling, and use the cooling heat of the high-temperature gas at the exhaust port of the compressor to heat the high-pressure refrigerant liquid in the generator, so that the jet subcooling cycle can effectively use the waste heat without other energy input, reducing the energy consumption. running costs. At the same time, the refrigerant entering the main condenser has a lower temperature, which reduces the space occupied by the condenser, and the cooling process is more sufficient, which can effectively improve the energy efficiency of the system and the service life of the compressor.
Description
Technical field
The present invention relates to refrigeration technology fields, and more specifically, it relates to a kind of cooling heat of port refrigerant of indenting with pressure
Injector is driven to carry out the refrigeration system of liquid supercooling.
Background technique
In the practical application of single stage compress steam refrigerating circulation, it can be subcooled by liquid, steam overheats and produces
The measures such as raw extraction cycle improve the thermodynamic perfect degree of circulation.Traditional liquid subcooling process can be by increasing condenser
Area realize, since the heat transferring medium of this mode does not change, so needing to greatly increase the heat exchange area of condenser
Heat transfer temperature difference is reduced, condensator outlet lower fluid temperature is just able to achieve, this condenser that only relies on realizes that supercooling is obtained
The degree of supercooling obtained has certain limit, and increases the heat exchange area of condenser, increases initial stage input cost, is not suitable for
Large-scale refrigerating system.Another mode for realizing liquid subcooling process is to increase subcooler after the condenser to improve supercooling
Degree, subcooler generally requires fluid and the refrigerant heat exchanger of lower temperature and realizes that refrigerant liquid is subcooled with this, however more low temperature
The fluid of degree is often not easy to obtain.By increasing regenerator for small refrigeration systems, make the liquid system of condensator outlet
The refrigerant heat exchanger of cryogen and evaporator outlet is realized, while regenerator realizes liquid supercooling, also increases compressor work consuming,
Whether the coefficient of refrigerating performance of extraction cycle improves, the physical property depending on refrigerant.Increase supercooling system for large-scale refrigerating system
Device for cooling increases a set of small-sized refrigeration system and is allowed to evaporator and the realization of large-scale refrigerating system condensator outlet liquid heat exchange
Biggish degree of supercooling, this mode increase input cost and operating cost due to increasing a set of Small Refrigerating Equipment.
The gas of high temperature is discharged in compressor in the process of running in refrigeration cycle, this part high-temperature gas enters condenser warp
Supercooling process, condensation process are transmitted to heat in cooling medium the liquid for becoming high pressure, wherein cooling procedure refrigerant one
Straight is the gas of high temperature, and in occupation of the big quantity space of condenser, cooling procedure is made whether sufficiently to directly affect the row of compressor
Temperature degree.Therefore, compressor exhaust temperature how is effectively reduced, the cooling heat of reasonable utilization exhaust outlet of compressor refrigerant is prolonged
The service life of long refrigeration compressor and reasonable energy are to a kind of effective way for being raising performance of refrigerant systems.
Summary of the invention
In view of the technical drawbacks of the prior art, it is an object of the present invention to provide a kind of injecting types, and refrigeration system is subcooled
System reduces operating cost to obtain biggish degree of supercooling.
The technical solution adopted to achieve the purpose of the present invention is:
Refrigeration cycle, the main refrigeration is subcooled in a kind of injecting type supercooling refrigeration system, including main refrigeration cycle and injecting type
The injector in refrigeration cycle is subcooled in injecting type described in the cooling thermal drivers of exhaust outlet of compressor high-temperature gas in circulation.
The main refrigeration cycle is by the cold side excessively of the compressor, the pipe wing passage of generator, main condenser, subcooler
Channel, first throttling device and evaporator return to the closed circulation of the compressor air suction mouth, the injection after being sequentially connected
It includes the injector, branch condenser, second throttling device and circulating pump, the high-pressure spray of the injector that refrigeration cycle, which is subcooled, in formula
Body import is connect with the shell-side outlet of the generator, and the injector outlet is connect with the import of the branch condenser, described
The outlet of branch condenser is divided into two-way, is connect all the way by the second throttling device with the evaporation side-entrance of the subcooler,
The evaporation side outlet of the subcooler is connect with the injector low-pressure fluid entrance, another way by the circulating pump with it is described
The shell-side inlet of generator connects.
The main refrigeration cycle is by the cold side excessively of the compressor, the pipe wing passage of generator, main condenser, subcooler
Channel, first throttling device, the mistake hot side of evaporator and superheater inlet and outlet return to the compressor air suction after being sequentially connected
The closed circulation of mouth；The injecting type supercooling refrigeration cycle includes the injector, branch condenser, second throttling device and circulation
Pump, the high-pressure fluid import of the injector are connect with the shell-side outlet of the generator, the outlet of the injector and Zhi Leng
The import of condenser connects, and the outlet of the branch condenser is divided into two-way, crosses cold side import with the superheater all the way and connect, described
The cold side outlet port of crossing of superheater is connect by the second throttling device with the evaporation side-entrance of the subcooler, the subcooler
Evaporation side outlet connect with the low-pressure fluid entrance of the injector；Another way passes through the circulating pump and the generator
Shell-side inlet connection.
The generator is plate heat exchanger, double pipe heat exchanger or shell and tube exchanger.
The subcooler is plate heat exchanger, double pipe heat exchanger or shell and tube exchanger.
The superheater is plate heat exchanger, double pipe heat exchanger or shell and tube exchanger.
Compared with prior art, the beneficial effects of the present invention are:
1, injecting type of the invention supercooling refrigeration system can obtain biggish degree of supercooling, utilize exhaust outlet of compressor high temperature
The hot heating generator mesohigh refrigerant liquid of the cooling of gas, so that injecting type crosses SAPMAC method and waste heat, nothing is effectively utilized
Other energy inputs, reduce operating cost.Meanwhile having lower temperature into the refrigerant of main condenser, reduce occupancy
The space of condenser, cooling procedure is more abundant, can effectively improve the efficiency of system and the service life of compressor.
2, in injecting type of the invention supercooling refrigeration system, exhaust outlet of compressor high-temperature gas cooling procedure is in generator
It realizes, main condenser only realizes the condensation process of refrigerant, reduces the heat exchange area of main condenser, reduce input cost.
3, lower, the subcooler that circulates in subcooler evaporation side evaporating temperature of the spray type refrigerating in refrigeration system of the invention
It is big that evaporation side and subcooler cross heat transfer temperature difference between cold side, and heat exchange efficiency is high, and main refrigeration cycle liquid refrigerant can before throttling
To obtain biggish degree of supercooling, specific refrigerating effect is big, and coefficient of refrigerating performance is big.
4, refrigeration system of the invention leans on generator mesohigh refrigerant liquid vapour using exhaust outlet of compressor high-temperature gas
Change cooling, the delivery temperature of good cooling results, compressor is lower, extends the service life of compressor.
Detailed description of the invention
Fig. 1 show the schematic diagram of injecting type supercooling refrigeration system；
Fig. 2 show the supercooling refrigeration system principle figure of the injecting type with superheater.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Injecting type supercooling refrigeration system of the invention includes main refrigeration cycle and injecting type supercooling refrigeration cycle, the main system
The injector 5 in refrigeration cycle is subcooled in injecting type described in the cooling thermal drivers of 1 exhaust outlet high-temperature gas of compressor in SAPMAC method.
According to the difference of refrigeration cycle, the exhaust outlet of compressor can make exhaust outlet of compressor high temperature using different connection types
The injector in refrigeration cycle is subcooled in injecting type described in the cooling thermal drivers of gas.Below with superheater refrigeration system and
Refrigeration system without superheater is that two specific embodiments are illustrated.
Embodiment 1
The schematic diagram of injecting type supercooling refrigeration system of the invention is as shown in Figure 1, include main refrigeration cycle and injecting type mistake
Cold refrigeration cycle, the main refrigeration cycle are by the compressor 1, the pipe wing passage of generator 2, main condenser 7, subcooler 6
Mistake cold side channel, first throttling device 4-1 and evaporator 8 be sequentially connected after return to the closing of 1 air entry of compressor
Circulation.The injecting type supercooling refrigeration cycle includes the injector 5, branch condenser 3, second throttling device 4-2 and circulating pump
9, the high-pressure fluid import of the injector 5 is connect with 2 shell-side outlet of generator, the outlet of injector 5 and the branch
The import of condenser 3 connects, and the outlet of the branch condenser 3 is divided into two-way, passes through the second throttling device 4-2 and institute all the way
State the evaporation side-entrance connection of subcooler 6, the low-pressure fluid entrance of the evaporation side outlet and the injector 5 of the subcooler 6
Connection；Another way is connect by the circulating pump 9 with the shell-side inlet of the generator 2.
This injecting type supercooling refrigeration system is divided into main refrigeration cycle and refrigeration cycle, the heat of main refrigeration cycle is subcooled in injecting type
Power process are as follows: the air entry of the compressor 1 is exported the refrigerant of sucking low-temp low-pressure by the evaporator 8, through the compression
Become the superheated vapor of high temperature and pressure by the pipe side-entrance of 1 exhaust outlet of compressor through the generator 2 after the compression boosting of machine 1
Into the generator 2, the cooling heat release in the generator 2 of the superheated vapor of high temperature and pressure becomes high pressure saturated vapor by institute
The pipe side outlet for stating generator 2 enters the main condenser 7, and high pressure saturated vapor condenses in the main condenser 7 becomes high
Press liquid.Highly pressurised liquid enters the subcooler 6 through the mistake cold side import of the subcooler 6, and highly pressurised liquid supercooling becomes temperature
Lower unsaturation liquid, unsaturated liquid become the damp steam of low-temp low-pressure through the first throttling device 4-1 reducing pressure by regulating flow
Into 8 evaporation endothermic of evaporator, the low pressure saturated vapor come out from evaporator 8 is completed main refrigeration by the sucking of compressor 1 and is followed
The thermal procession of ring.Refrigeration cycle thermal procession is subcooled in injecting type are as follows: the high temperature of the discharge of compressor 1 described in main refrigeration cycle is high
The superheated vapor of pressure heats the high pressure liquid refrigerant in the generator 2, described in high pressure liquid refrigerant partial gasification is used as
The working fluid of injector 5 enters the injector 5 by the high-pressure fluid import of injector 5, goes out from 6 evaporation side of subcooler
The low pressure saturated vapor that mouth comes out enters the injector 5 by the low-pressure fluid mouth of injector 6, enters institute from high-pressure fluid import
The working fluid for stating injector 6 becomes high-velocity fluid by expansion, decompression and steams with the low pressure for entering injector from low-pressure fluid mouth
Gas mixing, mixed refrigerant fluid speed can be converted into pressure energy into condensing in the branch condenser 3, the Zhi Lengning
The high pressure liquid refrigerant that device 3 exports is divided into two-way, is sent into the generator 2 through the circulating pump 9 all the way and continues heat cycles,
Another way enters the 6 evaporation side evaporation endothermic of subcooler through the second throttling device 4-2 reducing pressure by regulating flow, reduces main refrigeration and follows
The temperature of liquid refrigerant is surveyed in the supercooling of subcooler 6 described in ring, realizes biggish degree of supercooling, is completed injecting type supercooling refrigeration and is followed
Ring.
Embodiment 2
The schematic diagram of injecting type supercooling refrigeration system with superheater of the invention is as shown in Fig. 2, include main refrigeration cycle
Refrigeration cycle is subcooled with injecting type.The main refrigeration cycle is pipe wing passage, the main condenser by the compressor 1, generator 2
7, the mistake hot side inlet and outlet of the mistake cold side channel of subcooler 6, first throttling device 4-1, evaporator 8 and superheater 10 are sequentially connected
The closed circulation of 1 air entry of compressor is returned to later.The injecting type supercooling refrigeration cycle includes the injector 5, branch
Condenser 3, second throttling device 4-2 and circulating pump 9, the shell-side of the high-pressure fluid import of the injector 5 and the generator 2
Outlet connection, the outlet of the injector 5 are connect with the import of branch condenser 3, and the outlet of the branch condenser 3 is divided into two-way,
It crosses cold side import with the superheater 10 all the way to connect, the cold side outlet port of crossing of the superheater 10 passes through the second throttling device
4-2 is connect with the evaporation side-entrance of the subcooler 6, the lowpressure stream of the evaporation side outlet and the injector 5 of the subcooler 6
The connection of body entrance；Another way is connect by the circulating pump 9 with the shell-side inlet of the generator 2.
Injecting type supercooling refrigeration system with superheater of the invention is divided into main refrigeration cycle and follows with injecting type supercooling refrigeration
Ring, the thermal procession of main refrigeration cycle are as follows: the suction end of the compressor 1 is exported by the evaporator 8 through the superheater 10
The gas refrigerant for having certain degree of superheat for sucking low-temp low-pressure becomes high temperature and pressure after the compressor 1 compression boosting
Superheated vapor is discharged into the generator 2 through the pipe side-entrance of the generator 2 by 1 exhaust end of compressor, high temperature and pressure
Superheated vapor cooling heat release in the generator 2 becomes high pressure saturated vapor as described in the 2 pipe side outlet of generator entrance
Main condenser 7, high pressure saturated vapor condenses in the main condenser 7 becomes highly pressurised liquid.Highly pressurised liquid is through the subcooler 6
Mistake cold side import enter the subcooler 6 supercooling and become the lower unsaturated liquid of temperature, unsaturated liquid is through described first
The damp steam that throttling set 4-1 reducing pressure by regulating flow becomes low-temp low-pressure enters 8 evaporation endothermic of evaporator, comes out from evaporator 8
Low pressure saturated vapor through the superheater 10 mistake hot side import enter the superheater 10, added in the superheater 10
Heat is at the thermal procession for completing main refrigeration cycle after superheated vapor by the compressor 1 sucking.Refrigeration cycle is subcooled in injecting type
Thermal procession are as follows: the superheated vapor of the high temperature and pressure of the discharge of compressor 1 described in main refrigeration cycle heats in the generator 2
High pressure liquid refrigerant, high pressure liquid refrigerant partial gasification as the injector 5 working fluid by high-pressure fluid import
Into the injector 5, the low pressure saturated vapor come out from the subcooler 6 evaporation side outlet is as described in the entrance of low-pressure fluid mouth
Injector 5, from high-pressure fluid import enter the working fluid of injector by expansion, decompression become high-velocity fluid with from lowpressure stream
Body mouth enters the low-pressure steam mixing of injector, and mixed refrigerant fluid speed can be converted into pressure energy through injector 5
Outlet, which enters in the branch condenser 3, to be condensed, and the high pressure liquid refrigerant that the branch condenser 3 exports is divided into two-way, passes through all the way
The circulating pump 9 is sent into the generator 2 and continues heat cycles, and what another way entered the superheater 10 crosses cold side, and described
Heat exchange, which occurs, for the mistake hot side of superheater 10 becomes the unsaturated liquid for having certain degree of supercooling, and unsaturated liquid is through described second
Throttling set 4-2 reducing pressure by regulating flow enters the 6 evaporation side evaporation endothermic of subcooler, reduces subcooler 6 described in main refrigeration cycle
Liquid refrigerant temperature is surveyed in supercooling, realizes biggish degree of supercooling, completes injecting type and refrigeration cycle is subcooled.
The compressor 1 is any one of screw compressor, rotor compressor, helical-lobe compressor and piston compressor.
The branch condenser 3 can be integrated parallel form or single form with main condenser 7, can be air-cooled condensation
Device, water-cooled condenser or evaporative condenser.
The evaporator is air-cooled or solution refrigerating formula.
The superheater, subcooler, generator are plate heat exchanger, double pipe heat exchanger or shell and tube exchanger.
The first throttling device and second throttling device are electric expansion valve, heating power expansion valve, capillary or orifice plate section
Flow device.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. refrigeration system is subcooled in a kind of injecting type, which is characterized in that refrigeration cycle, institute is subcooled including main refrigeration cycle and injecting type
State the spray in the supercooling refrigeration cycle of injecting type described in the cooling thermal drivers of the exhaust outlet of compressor high-temperature gas in main refrigeration cycle
Emitter.
2. refrigeration system is subcooled in injecting type according to claim 1, which is characterized in that the main refrigeration cycle is by described
Compressor, the pipe wing passage of generator, main condenser, subcooler mistake cold side channel, first throttling device and evaporator successively
Return to the closed circulation of the compressor air suction mouth after connection, the injecting type supercooling refrigeration cycle include the injector,
Branch condenser, second throttling device and circulating pump, the high-pressure fluid import of the injector and the shell-side outlet of the generator
Connection, the injector outlet are connect with the import of the branch condenser, and the outlet of the branch condenser is divided into two-way, a-road-through
It crosses the second throttling device to connect with the evaporation side-entrance of the subcooler, the evaporation side outlet of the subcooler and the spray
The connection of emitter low-pressure fluid entrance, another way are connect by the circulating pump with the shell-side inlet of the generator.
3. refrigeration system is subcooled in injecting type according to claim 1, which is characterized in that the main refrigeration cycle is by described
Mistake cold side channel, first throttling device, evaporator and the overheat of compressor, the pipe wing passage of generator, main condenser, subcooler
The mistake hot side inlet and outlet of device return to the closed circulation of the compressor air suction mouth after being sequentially connected；The injecting type supercooling refrigeration
Circulation includes the injector, branch condenser, second throttling device and circulating pump, the high-pressure fluid import of the injector and institute
The shell-side outlet connection of generator is stated, the outlet of the injector is connect with the import of branch condenser, and the branch condenser goes out
Mouth is divided into two-way, crosses cold side import with the superheater all the way and connect, and the cold side outlet port of crossing of the superheater passes through described second
Throttling set is connect with the evaporation side-entrance of the subcooler, the low pressure of the evaporation side outlet and the injector of the subcooler
Fluid inlet connection；Another way is connect by the circulating pump with the shell-side inlet of the generator.
4. refrigeration system is subcooled in injecting type according to claim 2 or 3, which is characterized in that the generator is board-like changes
Hot device, double pipe heat exchanger or shell and tube exchanger.
5. refrigeration system is subcooled in injecting type according to claim 2 or 3, which is characterized in that the subcooler is board-like changes
Hot device, double pipe heat exchanger or shell and tube exchanger.
6. refrigeration system is subcooled in injecting type according to claim 3, which is characterized in that the superheater is plate-type heat-exchange
Device, double pipe heat exchanger or shell and tube exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910233306.4A CN109855323A (en) | 2019-03-26 | 2019-03-26 | Refrigeration system is subcooled in injecting type |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910233306.4A CN109855323A (en) | 2019-03-26 | 2019-03-26 | Refrigeration system is subcooled in injecting type |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701810A (en) * | 2019-10-29 | 2020-01-17 | 中机国能炼化工程有限公司 | Injection supercharging two-stage series connection supercooling double-temperature-zone refrigerating system and application |
| CN111141055A (en) * | 2020-01-21 | 2020-05-12 | 天津商业大学 | A dual-temperature zone multi-stage subcooled CO2 refrigeration system |
| CN113280522A (en) * | 2021-05-31 | 2021-08-20 | 中国矿业大学 | Double-evaporation-temperature jet refrigerator and method based on mixed working medium |
| CN113418314A (en) * | 2021-06-08 | 2021-09-21 | 瀚润联合高科技发展（北京）有限公司 | Ejection enthalpy-increasing evaporation cooling type air-cooled heat pump unit |
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| CN210089176U (en) * | 2019-03-26 | 2020-02-18 | 天津商业大学 | Injection type supercooling refrigerating system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701810A (en) * | 2019-10-29 | 2020-01-17 | 中机国能炼化工程有限公司 | Injection supercharging two-stage series connection supercooling double-temperature-zone refrigerating system and application |
| CN111141055A (en) * | 2020-01-21 | 2020-05-12 | 天津商业大学 | A dual-temperature zone multi-stage subcooled CO2 refrigeration system |
| CN111141055B (en) * | 2020-01-21 | 2023-11-28 | 天津商业大学 | A dual-temperature zone multi-stage subcooling CO2 refrigeration system |
| CN113280522A (en) * | 2021-05-31 | 2021-08-20 | 中国矿业大学 | Double-evaporation-temperature jet refrigerator and method based on mixed working medium |
| CN113280522B (en) * | 2021-05-31 | 2022-03-29 | 中国矿业大学 | A dual-evaporation temperature jet refrigerator and method based on mixed working fluid |
| CN113418314A (en) * | 2021-06-08 | 2021-09-21 | 瀚润联合高科技发展（北京）有限公司 | Ejection enthalpy-increasing evaporation cooling type air-cooled heat pump unit |
| CN113418314B (en) * | 2021-06-08 | 2022-11-08 | 瀚润联合高科技发展（北京）有限公司 | Ejection enthalpy-increasing evaporation cooling type air-cooled heat pump unit |
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