CN107726656A - The refrigerant heat pump system of single twin-stage conversion can be carried out - Google Patents
The refrigerant heat pump system of single twin-stage conversion can be carried out Download PDFInfo
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- CN107726656A CN107726656A CN201711093119.8A CN201711093119A CN107726656A CN 107726656 A CN107726656 A CN 107726656A CN 201711093119 A CN201711093119 A CN 201711093119A CN 107726656 A CN107726656 A CN 107726656A
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- Prior art keywords
- gas
- compressor
- cooler
- high temperature
- refrigerant
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
-
- 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- 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
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- 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
- 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
Abstract
The present invention relates to a kind of transcritical refrigerant heat pump that can carry out single twin-stage conversion, including cryogenic compressor, high temperature compressor, water cooling pipeline, cooling device, vaporising device and gas-liquid separator, the cooling device includes the gas cooler cooled down to the high temperature refrigerant of supercriticality, the intercooler cooled down to normal temperature high voltage refrigerant and the handpiece Water Chilling Units cooled down to water, the gas-liquid separator exports the air inlet with cryogenic compressor respectively, the air inlet connection of high temperature compressor, the gas outlet of the cryogenic compressor and the air inlet of high temperature compressor connect.The change-over switch for the conversion of single twin-stage is provided with pipeline between the gas-liquid separator and cryogenic compressor.The invention preferably resolves that operational efficiency is relatively low and the problem of Two-stage Compression system hypothermia compressor exhaust temperature is higher at low ambient temperatures using traditional single stage compress, can preferably adapt to working environment.
Description
Technical field
The present invention relates to technical field of heat pumps, more particularly to a kind of Refrigerant heat pump system that can carry out single twin-stage conversion
System.
Background technology
Currently, depletion of the ozone layer and climate warming are the subject matter that the whole world is faced.Due to refrigeration, air-conditioning, heat pump etc.
The widely used CFC and HCFC class refrigerants of industry, cause depletion of the ozone layer region increasing and greenhouse effects problem day
It is beneficial serious.And with the improvement of people ' s living standards, performance to systems such as refrigeration, air-conditioning, heat pumps it is also proposed that higher requirement,
It is so extremely urgent to improve the task of environment replacement conventional refrigeration equipment.Single stage compress heat pump of the prior art is in height
When possessing higher efficiency when being run in the environment of temperature, but being run in the environment of low temperature, efficiency reduces a lot；Two-stage Compression heat
Pump influences its operating efficiency because its own characteristic causes the delivery temperature of its own higher.
Therefore, it is necessary to the refrigerant heat pump system that can carry out single twin-stage conversion in the prior art is improved to solve
Certainly above-mentioned technical problem.
The content of the invention
In view of this, it is an object of the invention to provide a kind of refrigerant heat pump system that can carry out single twin-stage conversion,
Pass through the part that can be carried out the compact model of single twin-stage conversion and be set on its pipeline, it is ensured that in single Bi-level mode
Refrigerant charge is essentially identical during operation and ensures the delivery temperature of cryogenic compressor.The system not only can be in varying environment
At a temperature of efficiently, the operation of safety, the service efficiency of compressor can also be improved.It is real in particular by following technical scheme
It is existing：
The present invention relates to the refrigerant heat pump system that can carry out single twin-stage conversion, including it is cryogenic compressor, high temperature compressed
Machine, water cooling pipeline, cooling device, vaporising device and gas-liquid separator, the cooling device include the height to supercriticality
Gas cooler that warm refrigerant is cooled down, the intercooler cooled down to normal temperature high voltage refrigerant and water is carried out cold
But handpiece Water Chilling Units, the air inlet for exporting the air inlet with cryogenic compressor, high temperature compressor respectively of the gas-liquid separator
Connection, the gas outlet of the cryogenic compressor and the air inlet of high temperature compressor connect, the gas outlet of high temperature compressor and gas
The air inlet of cooler connects, and is provided with the pipeline between the gas-liquid separator and cryogenic compressor and is changed for single twin-stage
Change-over switch.
Further, be provided with pre-cooler between the cryogenic compressor and high temperature compressor, the handpiece Water Chilling Units with it is pre-
Water pump is provided between device for cooling, is provided with reservoir between the gas cooler and intercooler, the reservoir with
Switch I, the and of filter I for being filtered to normal temperature high voltage refrigerant are respectively arranged with pipeline between intercooler
The secondary throttling arrangement to be throttled to normal temperature high voltage refrigerant, set on the pipeline between the intercooler and wind-cooled evaporator
The filter II filtered to normal temperature high voltage refrigerant and the main throttling arrangement to be throttled to normal temperature high voltage refrigerant are equipped with,
Be provided with switch II on pipeline between the gas-liquid separator and high temperature compressor, the pre-cooler and gas cooler it
Between waterway pipe on be provided with switch III.
Further, the air inlet of the gas outlet of the pre-cooler and high temperature compressor connects, the gas cooler
The import connection of gas outlet and reservoir, the outlet of reservoir main road import with intercooler, intercooler respectively
Secondary road import connection, the import connection of the secondary way outlet and high temperature compressor of the intercooler, intercooler main road go out
Mouth is connected with the import of wind-cooled evaporator, and the outlet of wind-cooled evaporator and the import of gas-liquid separator connect.
Further, the delivery port of the pre-cooler in the water cooling pipeline and the water inlet of handpiece Water Chilling Units connect, cold water
The import of the delivery port and water pump of unit connects, and the water pump exports the water inlet with gas cooler, pre-cooler respectively
Water inlet connection, the water inlet of the delivery port of the gas cooler and handpiece Water Chilling Units connects.
Further, the switch I includes magnetic valve I and magnetic valve II, and the switch II is check valve, the bag of switch III
Include stop valve I and stop valve II.
Further, the type of cooling of the pre-cooler is water cooling or air-cooled, and the pre-cooler is double-tube heat exchanger, plate
Formula heat exchanger, spiral tube heat exchanger or finned heat exchanger.
Further, the main throttling arrangement is electric expansion valve, manual throttle valve, capillary or heating power expansion valve.
Further, the secondary throttling arrangement is electric expansion valve, manual throttle valve, capillary or heating power expansion valve.
Beneficial effects of the present invention：The present invention relates to the refrigerant heat pump system that can carry out single twin-stage conversion, the Dan Shuan
The transcritical refrigerant heat pump of level conversion is connected cryogenic compressor and high temperature compressor by pre-cooler.Simultaneously
When opening cryogenic compressor and high temperature compressor, it can be freezed or be heated under Two-stage Compression mode state；If only open
High temperature compressor, it can be freezed or be heated under single stage compress pattern.In addition, the heat pump can be in single stage compress mould
Free switching is carried out between formula and Two-stage Compression pattern, makes full use of each pattern advantage, ensures single stage compress pattern and twin-stage pressure
The delivery temperature of the essentially identical and relatively low cryogenic compressor of refrigerant charge, makes system in different rings when compressed mode is run
Efficient, safe operation under border；Other beneficial effects of the present invention will be described further in specific embodiment below.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the structural representation of the present invention.
In figure：1st, cryogenic compressor 2, pre-cooler 3, high temperature compressor 4, gas cooler 5, reservoir 6, mistake
Filter I 7, magnetic valve I 8, magnetic valve II 9, secondary throttling arrangement 10, intercooler 11, filter II 12, main throttling dress
Put 13, wind-cooled evaporator 14, gas-liquid separator 15, check valve 16, stop valve I 17, stop valve II 18, handpiece Water Chilling Units
19th, water pump 20, change-over switch.
Embodiment
As shown in the figure：The present invention relates to the refrigerant heat pump system that can carry out single twin-stage conversion, including cryogenic compressor
1st, high temperature compressor 3, water cooling pipeline, cooling device, vaporising device and gas-liquid separator 14, the cooling device are included to gas
Gas cooler 4 that state refrigerant is cooled down, the intercooler 10 cooled down to normal temperature high voltage refrigerant and water is entered
The handpiece Water Chilling Units 18 of row cooling, the gas-liquid separator 14 export the air inlet with cryogenic compressor 1, high temperature compressor respectively
3 air inlet connection, the gas outlet of the cryogenic compressor 1 are connected with the air inlet of high temperature compressor 3, high temperature compressor 3
Gas outlet is connected with the air inlet of gas cooler 4, is set on the pipeline between the gas-liquid separator 14 and cryogenic compressor 1
There is the change-over switch 20 for the conversion of single twin-stage.
By cryogenic compressor, high temperature compressor, water cooling pipeline, cooling device, vaporising device and gas-liquid separator part
Between connect, single stage compress pattern and Two-stage Compression pattern operationally refrigerant charging are ensured by the switching of single Bi-level mode
Measure essentially identical and relatively low low temperature compression delivery temperature, make system at different ambient temperatures efficiently, safe operation.
Set cooling device to be cooling fluid, by the heat of cold water absorption refrigeration agent, make the cold-producing medium stream before throttling
Body is subcooled in cooling device, and the refrigerant of main road is entered by the part of refrigerant after the throttling cooling of secondary choke valve
Row cooling.
Vaporising device is set to be to absorb external heat, after absorbing heat, the gas-liquid two-phase state refrigerant in evaporator leads to
Certain degree of superheat is often had, to prevent the liquid hammer of compressor.
Gas-liquid separator is arranged between wind-cooled evaporator and high temperature compressor and cryogenic compressor, is to prevent liquid from entering
Enter compressor, cause the liquid hammer of compressor.
The refrigerant can use carbon dioxide of the prior art, but be not limited to titanium dioxide of the prior art
Carbons refrigerant.
In the present embodiment, pre-cooler 2, the cooling-water machine are provided between the cryogenic compressor 1 and high temperature compressor 3
Water pump 19 is provided between group 18 and pre-cooler 2, reservoir is provided between the gas cooler 4 and intercooler 10
5, switch I is respectively arranged with the pipeline between the reservoir 5 and intercooler 10, for entering to normal temperature high voltage refrigerant
The filter I 6 of row filtering and the secondary throttling arrangement 9 to be throttled to normal temperature high voltage refrigerant, the intercooler 10 and wind
The filter II 11 that is filtered to normal temperature high voltage refrigerant is provided with pipeline between cold evaporator 13 and to normal temperature high voltage
The main throttling arrangement 12 that refrigerant is throttled, it is provided with the pipeline between the gas-liquid separator 14 and high temperature compressor 3
II is switched, is provided with the pipeline between the gas-liquid separator 14 and cryogenic compressor 1 and is opened for the conversion of single twin-stage conversion
20 are closed, switch III is provided with the pipeline between the pre-cooler 2 and gas cooler 4.
Pre-cooler is set to be to connect cryogenic compressor and high temperature compressor, refrigerant goes out from cryogenic compressor
Gas port is entered in pre-cooler, and pre-cooler cools down to gaseous refrigerant, so as to reduce the air-breathing of high temperature compressor
Temperature.
Reservoir is set to be to work as the refrigerant heat pump system in the process of running, due to the change of operating mode or to heat pump system
When system is adjusted, refrigerant can be back in reservoir, with the internal circulating load of systems stabilisation inner refrigerant, make refrigerant system
In normal operating condition；, can be by certain operation when a certain position of refrigerating plant, which is broken down, to be needed to overhaul, will
Refrigerant collecting in system is into reservoir, to avoid substantial amounts of refrigerant outflow from causing to waste.
Filter is set on pipeline in the impurity in refrigerant is filtered out, to protect valve and the normal of equipment to make
With.When fluid enters on pipeline the filter set, the fluid of cleaning is then discharged by the outlet of filter, when needs cleaned
When filtering device, as long as dismountable filter screen is taken out, reloaded after processing, working service is extremely convenient.
Single twin-stage change-over switch can use stop valve or magnetic valve, when single stage compress is changed to Two-stage Compression,
Change-over switch is opened；Two-stage Compression to single stage compress change when, change-over switch close.And then opened or closed by change-over switch
Close and realize the conversion of single Two-stage Compression pattern.
In the present embodiment, the gas outlet of the pre-cooler 2 is connected with the air inlet of high temperature compressor 3, high temperature compressor 3
Gas outlet be connected with the air inlet of gas cooler 4, the gas outlet of the gas cooler 4 and the air inlet of reservoir 5 connect
Connect, the main road import with intercooler 10, the secondary road import of intercooler 10 are connected respectively for the outlet of reservoir 5, described
The outlet on the secondary road of intercooler 10 is connected with the import of high temperature compressor 3, the outlet of the main road of intercooler 10 and air-cooled steaming
The import connection of device 13 is sent out, the outlet of wind-cooled evaporator 13 is connected with the import of gas-liquid separator 14.
The right compression conduit of single twin-stage conversion is set, when being run using single stage compress pattern in the higher environment of temperature
Possesses higher refrigerating efficiency；And Two-stage Compression pipeline has the advantage that low temperature environment is run, different running environment can be met
Demand, it can also be ensured that the charging amount of refrigerant is essentially identical during operation, to improve the operating efficiency of compressor.
In the present embodiment, the delivery port of the pre-cooler 2 in the water cooling pipeline connects with the water inlet of handpiece Water Chilling Units 18
Connect, the delivery port of handpiece Water Chilling Units 18 is connected with the import of water pump 19, and the outlet of the water pump 19 is entered with gas cooler 4 respectively
The mouth of a river, the water inlet connection of pre-cooler 2, the delivery port of the gas cooler 4 are connected with the water inlet of handpiece Water Chilling Units 18.
Pre-cooler is connected with water pump, the delivery port of pre-cooler and the water inlet connection of handpiece Water Chilling Units are to precooling
Fluid in device is cooled down, and sets water pump to be on the one hand to convey sufficient fluid, further aspect is that ensureing pre- cold charge
The refrigerant put carries out contactless heat exchange with the fluid entered from water pump in pre-cooler.
In the present embodiment, the switch I includes magnetic valve I 7 and magnetic valve II 8, and the switch II is check valve 15, described
Switch III includes stop valve I 16 and stop valve II 17.
It is to prevent that at the cold time, excessive refrigerant migration causes out into evaporator to set magnetic valve I 7
Occurs liquid hammer during machine；The effect of magnetic valve II 8 is to switch to close by opening when twin-stage is changed to single-stage, prevents intercooler
Path is formed between secondary road and high temperature compressor, influences the normal operation of system circulation.Under single stage compress mode state, unidirectionally
Valve has the function using pressure differential controlling stream direction of flow, i.e. fluid can only be exported by being set on pipeline from gas-liquid separator
Check valve flow to high temperature compressor；Under Two-stage Compression mode state, normal temperature high voltage refrigerant caused by cryogenic compressor is not
The air entry of high temperature compressor can be entered from gas-liquid separator.Switch III is set to be not only in that stop valve to the medium in pipeline
The important function of cut-out and throttling is played, stop valve I 16 is opened during precooling, and stop valve I 16 is closed during without precooling.In addition,
Frictional force is small between sealing surface during stop valve opening and closing, and relatively durable, Lift is little, easy to manufacture, easy to maintenance, no
Mesolow is only applicable to, applies also for normal temperature high voltage.
In the present embodiment, the type of cooling of the pre-cooler 2 is water cooling or air-cooled, and the pre-cooler 2 changes for sleeve pipe
Hot device, plate type heat exchanger, spiral tube heat exchanger or finned heat exchanger.It is by the partial heat biography of hot fluid using heat exchanger
The equipment for passing cold fluid, water and refrigerant are exchanged heat by the heat exchanger.
In the present embodiment, the main throttling arrangement is electric expansion valve, manual throttle valve, capillary or heating power expansion valve.
The secondary throttling arrangement is electric expansion valve, manual throttle valve, capillary or heating power expansion valve.Throttle part is set to be not only in that
Piping flow is adjusted by restriction section size or chock length, also reside in drops normal temperature high voltage refrigerant by throttle part
Pressure, it is changed into the refrigerant of low-pressure low-temperature.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and unrestricted, reference preferably reality
Example is applied the present invention is described in detail, it will be understood by those within the art that, can be to the technical side of the present invention
Case is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover in the present invention
Right among.
Claims (7)
- A kind of 1. transcritical refrigerant heat pump that can carry out single twin-stage conversion, it is characterised in that：Including cryogenic compressor, High temperature compressor, water cooling pipeline, cooling device, vaporising device and gas-liquid separator, the cooling device are included to overcritical Gas cooler that the high temperature refrigerant of state is cooled down, the intercooler cooled down to normal temperature high voltage refrigerant and right The handpiece Water Chilling Units that water is cooled down, the gas-liquid separator export the air inlet with cryogenic compressor, high temperature compressor respectively Air inlet connection, the air inlet of the gas outlet of the cryogenic compressor and high temperature compressor connects, the outlet of high temperature compressor Mouth is connected with the air inlet of gas cooler, is provided with the pipeline between the gas-liquid separator and cryogenic compressor for single The change-over switch of twin-stage conversion.
- 2. the transcritical refrigerant heat pump according to claim 1 that single twin-stage conversion can be carried out, it is characterised in that： Pre-cooler is provided between the cryogenic compressor and high temperature compressor, is provided between the handpiece Water Chilling Units and pre-cooler Water pump, reservoir is provided between the gas cooler and intercooler, between the reservoir and intercooler Switch I is respectively arranged with pipeline, for the filter I that is filtered to normal temperature high voltage refrigerant and to normal temperature high voltage refrigerant The secondary throttling arrangement to be throttled, it is provided with to normal temperature high voltage system on the pipeline between the intercooler and wind-cooled evaporator Filter II that cryogen is filtered and the main throttling arrangement to be throttled to normal temperature high voltage refrigerant, the gas-liquid separator with Switch II is provided with pipeline between high temperature compressor, is set on the waterway pipe between the pre-cooler and gas cooler It is equipped with switch III.
- 3. the transcritical refrigerant heat pump according to claim 2 that single twin-stage conversion can be carried out, it is characterised in that： The air inlet of the gas outlet of the pre-cooler and high temperature compressor connects, the gas outlet of the gas cooler and reservoir Import is connected, and the main road import with intercooler, the secondary road import of intercooler are connected respectively for the outlet of reservoir, described The import connection of the secondary way outlet and high temperature compressor of intercooler, the outlet of intercooler main road are entered with wind-cooled evaporator Mouth connection, the outlet of wind-cooled evaporator and the import of gas-liquid separator connect.
- 4. the transcritical refrigerant heat pump according to claim 3 that single twin-stage conversion can be carried out, it is characterised in that： The delivery port of pre-cooler in the water cooling pipeline and the water inlet of handpiece Water Chilling Units connect, the delivery port and water of handpiece Water Chilling Units The import connection of pump, the water inlet with gas cooler, the water inlet of pre-cooler are connected respectively for the outlet of water pump, the gas The delivery port of cooler and the water inlet of handpiece Water Chilling Units connect.
- 5. the transcritical refrigerant heat pump according to claim 4 that single twin-stage conversion can be carried out, it is characterised in that： The switch I includes magnetic valve I and magnetic valve II, and the switch II is check valve, and the switch III includes stop valve I and cut-off Valve II.
- 6. the transcritical refrigerant heat pump assembly according to claim 5 that single twin-stage conversion can be carried out, it is characterised in that： The main throttling arrangement is electric expansion valve, manual throttle valve, capillary or heating power expansion valve.
- 7. the transcritical refrigerant heat pump assembly according to claim 6 that single twin-stage conversion can be carried out, it is characterised in that： The secondary throttling arrangement is electric expansion valve, manual throttle valve, capillary or heating power expansion valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711093119.8A CN107726656A (en) | 2017-11-08 | 2017-11-08 | The refrigerant heat pump system of single twin-stage conversion can be carried out |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711093119.8A CN107726656A (en) | 2017-11-08 | 2017-11-08 | The refrigerant heat pump system of single twin-stage conversion can be carried out |
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| CN107726656A true CN107726656A (en) | 2018-02-23 |
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Cited By (4)
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| CN108253661A (en) * | 2018-03-01 | 2018-07-06 | 郑州云宇新能源技术有限公司 | Protecting against shock device for storing liquid and its CO 2 trans-critical heat pump and fluorine chlorine hold high cooling system device |
| CN108426428A (en) * | 2018-05-02 | 2018-08-21 | 天津城建大学 | Based on CO2The high/low temperature locellus drying system of Trans-critical cycle heat pump cycle |
| CN109635505A (en) * | 2019-01-09 | 2019-04-16 | 西南石油大学 | A kind of serrated fin heat exchanger flowing heat transfer characteristic prediction method |
| WO2023123843A1 (en) * | 2021-12-28 | 2023-07-06 | 江苏苏净集团有限公司 | Transcritical carbon dioxide single-stage and double-stage compression hot water system and control method therefor |
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| WO2023123843A1 (en) * | 2021-12-28 | 2023-07-06 | 江苏苏净集团有限公司 | Transcritical carbon dioxide single-stage and double-stage compression hot water system and control method therefor |
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