CN108007006A - A kind of the self-cascade heat pump system and operational mode of multi-mode injection synergy - Google Patents
A kind of the self-cascade heat pump system and operational mode of multi-mode injection synergy Download PDFInfo
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- CN108007006A CN108007006A CN201711085694.3A CN201711085694A CN108007006A CN 108007006 A CN108007006 A CN 108007006A CN 201711085694 A CN201711085694 A CN 201711085694A CN 108007006 A CN108007006 A CN 108007006A
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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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- 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 invention discloses the self-cascade heat pump system and operational mode of a kind of injection synergy of multi-mode, which is made of compressor, condenser, gas-liquid separator, throttle valve, condenser/evaporator, evaporator, steam jet ejector and control valve；Compressor outlet is connected with condenser, gas-liquid separator, first throttle valve, condenser/evaporator, the 4th control valve and suction port of compressor successively；Gas-liquid separator upper end outlet divides two-way, is connected successively with the first control valve, condenser/evaporator, second throttle, evaporator and first throttle valve outlet all the way；Another way is connected with the second control valve and steam jet ejector entrance；Condenser/evaporator outlet is connected with third control valve and steam jet ejector entrance；Steam jet ejector outlet is connected with suction port of compressor；The present invention recycles the available energy of gas-liquid separator mesohigh refrigerant gas using steam jet ejector, and can select single-stage heat pump, self-cascade heat pump or part overlapping heat pump operation mode according to outdoor environment temperature.
Description
Technical field
The present invention relates to a kind of self-cascade heat pump system, and in particular to a kind of self-cascade heat pump system of multi-mode injection synergy
System and operational mode.
Background technology
It is one of China's winter main heat-supplying mode using heat pump unit heat supply, but in the cold north, outdoor environment temperature
Degree is often very low, single-stage heat pump cisco unity malfunction or poor performance.Self-cascade heat pump utilizes mixed non-azeotropic refrigerant
The characteristics of gas-liquid phase constituent is different in gas-liquid phase equilibrium, by condenser and gas-liquid separator by higher boiling refrigerant and low boiling
Point refrigerant, which separates and enters two circulations, carries out overlapping heating.Compared with conventional overlapping heat pump, self-cascade heat pump only needs one
Compressor achieves that overlapping heats, and moving component is few, simple and reliable；Compared with single-stage heat pump, self-cascade heat pump can be
Heated in the case that outdoor environment temperature is relatively low, but in the case where outdoor environment temperature is higher, the performance of self-cascade heat pump compared with
Single-stage heat pump is poor.So in the widely different area of Summer and winter outdoor environment temperature, single use single-stage heat pump or Auto-cascade cycle
Heat pump cannot all be met the needs of users well.
The content of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of self-cascade heat pump system of multi-mode injection synergy
Single-stage heat pump and self-cascade heat pump are effectively bonded together by system and operational mode, the system, and user can be according to outdoor environment
Temperature, selects single-stage heat pump, self-cascade heat pump or part overlapping heat pump operation mode, system performance is reached optimum state；Separately
Outside, the available energy for recycling higher pressure refrigerant gas is used for the system increases steam jet ejector.
To reach above-mentioned purpose, the technical solution adopted in the present invention is：
A kind of self-cascade heat pump system of multi-mode injection synergy, by compressor 1, condenser 2, gas-liquid separator 3, first
Throttle valve 4, condenser/evaporator 5, second throttle 6, evaporator 7, steam jet ejector 8, the first control valve 9, the second control valve 10,
11 and the 4th control valve 12 of third control valve is formed；
Steamed successively with condenser 2, gas-liquid separator 3, first throttle valve 4, condensation by connecting tube the outlet of compressor 1
Hair device 5, the 4th control valve 12 are connected with 1 entrance of compressor；3 upper end outlet of gas-liquid separator divides two-way, passes through connection all the way
Pipe is connected with the outlet of the first control valve 9, condenser/evaporator 5, second throttle 6, evaporator 7 and first throttle valve 4 successively；Separately
It is connected successively with the second control valve 10 and 8 entrance of steam jet ejector by connecting tube all the way；In addition, condenser/evaporator 5 exports
It is connected successively with third control valve 11 and 8 entrance of steam jet ejector by connecting tube；Steam jet ejector 8 exports and compressor 1
Entrance is connected.
The steam jet ejector 8 recycles the available energy of 3 mesohigh refrigerant gas of gas-liquid separator, improves compressor 1
The pressure and temperature of entrance.
First control valve 9, the second control valve 10,11 and the 4th control valve 12 of third control valve are solenoid valve, its
Effect is the flow direction by controlling refrigerant, determines the system by single-stage heat pump, self-cascade heat pump or part overlapping heat
Pump mode operation.
A kind of operational mode of the self-cascade heat pump system of multi-mode injection synergy, including single-stage heat pump, runback
Overlapping heat pump and part overlapping heat pump operation mode, it is specific as follows：
Single-stage heat pump：First control valve 9 and 12 Close All of the 4th control valve, the second control valve 10 and third control valve 11
It is all turned on；The high pressure mixed non-azeotropic refrigerant steam that compressor 1 exports, which enters after condenser 2 condenses heat release, is changed into high compacting
Cryogen gas-fluid two-phase mixture, high-pressure refrigerant gas-fluid two-phase mixture carry out gas-liquid separation, gas-liquid point in gas-liquid separator 3
The higher pressure refrigerant gas isolated from device 3 enters steam jet ejector 8 by the second control valve 10, and gas-liquid separator 3 separates
Obtained high pressure refrigerant liquid enters 4 reducing pressure by regulating flow of first throttle valve into middle compression refrigerant gas-fluid two-phase mixture, Ran Houjin
Enter after 5 evaporation endothermic of condenser/evaporator that to enter steam jet ejector 8 by third control valve 11 isolated by gas-liquid separator 3
Compressor 1, which is returned to, after the boosting of higher pressure refrigerant gas injection completes circulation；
Self-cascade heat pump：First control valve 9 and the 4th control valve 12 are all turned on, the second control valve 10 and third control valve
11 Close Alls；The high pressure mixed non-azeotropic refrigerant steam that compressor 1 exports, which enters after condenser 2 condenses heat release, is changed into high pressure
Refrigerant air-liquid two-phase mixture, high-pressure refrigerant gas-fluid two-phase mixture carry out gas-liquid separation, gas-liquid in gas-liquid separator 3
The isolated high pressure refrigerant liquid of separator 3 is mixed into 4 reducing pressure by regulating flow of first throttle valve into middle compression refrigerant gas-liquid two-phase
Compound, then mixes with carrying out the low pressure refrigerant gas of flash-pot 7；The isolated high-pressure refrigerant gas of gas-liquid separator 3
Body enters condenser/evaporator 5 by the first control valve 9 and condenses heat release, subsequently into 6 reducing pressure by regulating flow of second throttle into low pressure system
Cryogen gas-fluid two-phase mixture, low pressure refrigerant gas-fluid two-phase mixture enter after 7 evaporation endothermic of evaporator with coming from first segment
The middle compression refrigerant gas-fluid two-phase mixture mixing of valve 4 is flowed, is absorbed heat after mixing into condenser/evaporator 5, then passes through the 4th control
Valve 12 processed returns to compressor 1 and completes circulation；
Part overlapping heat pump：First control valve 9, the second control valve 10,11 and the 4th control valve of third control valve, 12 equal portion
Separately open；The high pressure mixed non-azeotropic refrigerant steam that compressor 1 exports, which enters after condenser 2 condenses heat release, is changed into high-pressure refrigeration
Agent gas-fluid two-phase mixture, high-pressure refrigerant gas-fluid two-phase mixture carry out gas-liquid separation, gas-liquid separation in gas-liquid separator 3
The isolated high pressure refrigerant liquid of device 3 enters 4 reducing pressure by regulating flow of first throttle valve into middle compression refrigerant gas-fluid two-phase mixture,
Then mixed with carrying out the low pressure refrigerant gas of flash-pot 7；The isolated higher pressure refrigerant gas of gas-liquid separator 3 is divided to two
Road：Steam jet ejector 8 is entered by the second control valve 10 all the way；Another way is cold into condenser/evaporator 5 by the first control valve 9
Solidifying heat release, subsequently into 6 reducing pressure by regulating flow of second throttle into low pressure refrigerant gas-fluid two-phase mixture, low pressure refrigerant gas-liquid two
Phase mixture mixes after entering 7 evaporation endothermic of evaporator with the middle compression refrigerant gas-fluid two-phase mixture from first throttle valve 4,
Absorb heat subsequently into condenser/evaporator 5, two-way is divided after heat absorption, returning to compressor 1 by the 4th control valve 12 all the way completes circulation；
Another way is drawn by third control valve 11 into steam jet ejector 8 by the isolated higher pressure refrigerant gas of gas-liquid separator 3
The completion circulation of compressor 1 is returned to after penetrating boosting.
Relative to conventional self-cascade heat pump system, the self-cascade heat pump system of multi-mode injection synergy of the present invention has a variety of
Operational mode is available, is adapted to different outdoor environment temperatures.The system only must be in conventional self-cascade heat pump system
On the basis of add steam jet ejector and control valve, and steam jet ejector and control valve itself is simple in structure, cheap, performance
Stablize, thus the self-cascade heat pump system of multi-mode injection synergy be expected to achieve the purpose that it is energy saving with it is economical, be expected to reach as follows
Beneficial effect：
(1) single-stage heat pump, self-cascade heat pump or part overlapping heat pump operation mode can be selected according to outdoor environment temperature,
System performance is set to reach optimum state；
(2) higher pressure refrigerant gas that gas-liquid separator separates obtain injection condenser/evaporator in steam jet ejector exports
Middle compression refrigerant gas, improve the temperature and pressure of suction port of compressor refrigerant gas.
Brief description of the drawings
Fig. 1 is the structure diagram of present system.
Embodiment
As shown in Figure 1, a kind of self-cascade heat pump system of present invention multi-mode injection synergy, by compressor 1, condenser 2,
Gas-liquid separator 3, first throttle valve 4, condenser/evaporator 5, second throttle 6, evaporator 7, steam jet ejector 8, first control
Valve 9, the second control valve 10,11 and the 4th control valve 12 of third control valve are formed；
Steamed successively with condenser 2, gas-liquid separator 3, first throttle valve 4, condensation by connecting tube the outlet of compressor 1
Hair device 5, the 4th control valve 12 are connected with 1 entrance of compressor；3 upper end outlet of gas-liquid separator divides two-way, passes through connection all the way
Pipe is connected with the outlet of the first control valve 9, condenser/evaporator 5, second throttle 6, evaporator 7 and first throttle valve 4 successively；Separately
It is connected successively with the second control valve 10 and 8 entrance of steam jet ejector by connecting tube all the way；In addition, condenser/evaporator 5 exports
It is connected successively with third control valve 11 and 8 entrance of steam jet ejector by connecting tube；Steam jet ejector 8 exports and compressor 1
Entrance is connected.
The self-cascade heat pump system of multi-mode injection synergy of the present invention presses following mode operation：
Single-stage heat pump：First control valve 9 and 12 Close All of the 4th control valve, the second control valve 10 and third control valve 11
It is all turned on；The high pressure mixed non-azeotropic refrigerant steam that compressor 1 exports, which enters after condenser 2 condenses heat release, is changed into high compacting
Cryogen gas-fluid two-phase mixture, high-pressure refrigerant gas-fluid two-phase mixture carry out gas-liquid separation, gas-liquid point in gas-liquid separator 3
The higher pressure refrigerant gas isolated from device 3 enters steam jet ejector 8 by the second control valve 10, and gas-liquid separator 3 separates
Obtained high pressure refrigerant liquid enters 4 reducing pressure by regulating flow of first throttle valve into middle compression refrigerant gas-fluid two-phase mixture, Ran Houjin
Enter after 5 evaporation endothermic of condenser/evaporator that to enter steam jet ejector 8 by third control valve 11 isolated by gas-liquid separator 3
Compressor 1, which is returned to, after the boosting of higher pressure refrigerant gas injection completes circulation.
Self-cascade heat pump：First control valve 9 and the 4th control valve 12 are all turned on, the second control valve 10 and third control valve
11 Close Alls；The high pressure mixed non-azeotropic refrigerant steam that compressor 1 exports, which enters after condenser 2 condenses heat release, is changed into high pressure
Refrigerant air-liquid two-phase mixture, high-pressure refrigerant gas-fluid two-phase mixture carry out gas-liquid separation, gas-liquid in gas-liquid separator 3
The isolated high pressure refrigerant liquid of separator 3 is mixed into 4 reducing pressure by regulating flow of first throttle valve into middle compression refrigerant gas-liquid two-phase
Compound, then mixes with carrying out the low pressure refrigerant gas of flash-pot 7；The isolated high-pressure refrigerant gas of gas-liquid separator 3
Body enters condenser/evaporator 5 by the first control valve 9 and condenses heat release, subsequently into 6 reducing pressure by regulating flow of second throttle into low pressure system
Cryogen gas-fluid two-phase mixture, low pressure refrigerant gas-fluid two-phase mixture enter after 7 evaporation endothermic of evaporator with coming from first segment
The middle compression refrigerant gas-fluid two-phase mixture mixing of valve 4 is flowed, is absorbed heat after mixing into condenser/evaporator 5, then passes through the 4th control
Valve 12 processed returns to compressor 1 and completes circulation.
Part overlapping heat pump：First control valve 9, the second control valve 10,11 and the 4th control valve of third control valve, 12 equal portion
Separately open；The high pressure mixed non-azeotropic refrigerant steam that compressor 1 exports, which enters after condenser 2 condenses heat release, is changed into high-pressure refrigeration
Agent gas-fluid two-phase mixture, high-pressure refrigerant gas-fluid two-phase mixture carry out gas-liquid separation, gas-liquid separation in gas-liquid separator 3
The isolated high pressure refrigerant liquid of device 3 enters 4 reducing pressure by regulating flow of first throttle valve into middle compression refrigerant gas-fluid two-phase mixture,
Then mixed with carrying out the low pressure refrigerant gas of flash-pot 7；The isolated higher pressure refrigerant gas of gas-liquid separator 3 is divided to two
Road：Steam jet ejector 8 is entered by the second control valve 10 all the way；Another way is cold into condenser/evaporator 5 by the first control valve 9
Solidifying heat release, subsequently into 6 reducing pressure by regulating flow of second throttle into low pressure refrigerant gas-fluid two-phase mixture, low pressure refrigerant gas-liquid two
Phase mixture mixes after entering 7 evaporation endothermic of evaporator with the middle compression refrigerant gas-fluid two-phase mixture from first throttle valve 4,
Absorb heat subsequently into condenser/evaporator 5, two-way is divided after heat absorption, returning to compressor 1 by the 4th control valve 12 all the way completes circulation；
Another way is drawn by third control valve 11 into steam jet ejector 8 by the isolated higher pressure refrigerant gas of gas-liquid separator 3
The completion circulation of compressor 1 is returned to after penetrating boosting.
Claims (4)
- A kind of 1. self-cascade heat pump system of multi-mode injection synergy, it is characterised in that：By compressor (1), condenser (2), gas Liquid/gas separator (3), first throttle valve (4), condenser/evaporator (5), second throttle (6), evaporator (7), steam jet ejector (8), the first control valve (9), the second control valve (10), third control valve (11) and the 4th control valve (12) are formed；The compressor (1) outlet by connecting tube successively with condenser (2), gas-liquid separator (3), first throttle valve (4), cold Solidifying evaporator (5), the 4th control valve (12) are connected with compressor (1) entrance；Gas-liquid separator (3) upper end outlet divides two-way, All the way by connecting tube successively with the first control valve (9), condenser/evaporator (5), second throttle (6), evaporator (7) and first Throttle valve (4) outlet is connected；Another way by connecting tube successively with the second control valve (10) and steam jet ejector (8) entrance phase Connection；In addition, condenser/evaporator (5) outlet by connecting tube successively with third control valve (11) and steam jet ejector (8) entrance It is connected；Steam jet ejector (8) outlet is connected with compressor (1) entrance.
- A kind of 2. self-cascade heat pump system of multi-mode injection synergy as claimed in claim 1, it is characterised in that：The steaming The available energy of vapour injector (8) recycling gas-liquid separator (3) mesohigh refrigerant gas, improves the pressure of compressor (1) entrance And temperature.
- A kind of 3. self-cascade heat pump system of multi-mode injection synergy as claimed in claim 1, it is characterised in that：Described One control valve (9), the second control valve (10), third control valve (11) and the 4th control valve (12) are solenoid valve, its effect is logical The flow direction of control refrigerant is crossed, determines the system by single-stage heat pump, self-cascade heat pump or part overlapping heat pump mode fortune OK.
- 4. a kind of operational mode of the self-cascade heat pump system of multi-mode injection synergy of claims 1 to 3 any one of them, its It is characterized in that：It is specific as follows including single-stage heat pump, self-cascade heat pump and part overlapping heat pump operation mode：Single-stage heat pump：First control valve (9) and the 4th control valve (12) Close All, the second control valve (10) and third control valve (11) it is all turned on；The high pressure mixed non-azeotropic refrigerant steam of compressor (1) outlet becomes after entering condenser (2) condensation heat release For high-pressure refrigerant gas-fluid two-phase mixture, high-pressure refrigerant gas-fluid two-phase mixture carries out gas-liquid in gas-liquid separator (3) Separation, the isolated higher pressure refrigerant gas of gas-liquid separator (3) enter steam jet ejector by the second control valve (10) (8), it is cold into middle compacting to enter first throttle valve (4) reducing pressure by regulating flow for the isolated high pressure refrigerant liquid of gas-liquid separator (3) Agent gas-fluid two-phase mixture, is sprayed subsequently into after condenser/evaporator (5) evaporation endothermic by third control valve (11) into steam Emitter (8) is returned to compressor (1) after the isolated higher pressure refrigerant gas injection boosting of gas-liquid separator (3) and completes to follow Ring.Self-cascade heat pump：First control valve (9) and the 4th control valve (12) are all turned on, the second control valve (10) and the 3rd control Valve (11) Close All；After the high pressure mixed non-azeotropic refrigerant steam of compressor (1) outlet enters condenser (2) condensation heat release It is changed into high-pressure refrigerant gas-fluid two-phase mixture, high-pressure refrigerant gas-fluid two-phase mixture is in gas-liquid separator (3) into promoting the circulation of qi Liquid separates, and the isolated high pressure refrigerant liquid of gas-liquid separator (3) enters first throttle valve (4) reducing pressure by regulating flow into middle compacting Cryogen gas-fluid two-phase mixture, then mixes with carrying out the low pressure refrigerant gas of flash-pot (7)；Gas-liquid separator (3) separates Obtained higher pressure refrigerant gas enters condenser/evaporator (5) by the first control valve (9) and condenses heat release, subsequently into the second section Stream valve (6) reducing pressure by regulating flow enters evaporator into low pressure refrigerant gas-fluid two-phase mixture, low pressure refrigerant gas-fluid two-phase mixture (7) mixed after evaporation endothermic with the middle compression refrigerant gas-fluid two-phase mixture from first throttle valve (4), condensation is entered after mixing Evaporator (5) absorbs heat, and then returning to compressor (1) by the 4th control valve (12) completes circulation.Part overlapping heat pump：First control valve (9), the second control valve (10), third control valve (11) and the 4th control valve (12) Part is opened；The high pressure mixed non-azeotropic refrigerant steam of compressor (1) outlet is changed into after entering condenser (2) condensation heat release High-pressure refrigerant gas-fluid two-phase mixture, high-pressure refrigerant gas-fluid two-phase mixture carry out gas-liquid point in gas-liquid separator (3) From the isolated high pressure refrigerant liquid of gas-liquid separator (3) enters first throttle valve (4) reducing pressure by regulating flow into middle compression refrigerant Gas-fluid two-phase mixture, then mixes with carrying out the low pressure refrigerant gas of flash-pot (7)；Gas-liquid separator (3) is isolated Higher pressure refrigerant gas divide two-way：Steam jet ejector (8) is entered by the second control valve (10) all the way；Another way passes through first Control valve (9) enters condenser/evaporator (5) condensation heat release, subsequently into second throttle (6) reducing pressure by regulating flow into low pressure refrigerant Gas-fluid two-phase mixture, low pressure refrigerant gas-fluid two-phase mixture enter after evaporator (7) evaporation endothermic with coming from first throttle The middle compression refrigerant gas-fluid two-phase mixture mixing of valve (4), absorbs heat subsequently into condenser/evaporator (5), divides two-way after heat absorption, and one Road returns to compressor (1) by the 4th control valve (12) and completes circulation；Another way is sprayed by third control valve (11) into steam Emitter (8) is returned to compressor (1) after the isolated higher pressure refrigerant gas injection boosting of gas-liquid separator (3) and completes to follow Ring.
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| CN201711085694.3A CN108007006B (en) | 2017-11-07 | 2017-11-07 | A kind of the self-cascade heat pump system and operational mode of multi-mode injection synergy |
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| CN108007006B CN108007006B (en) | 2019-04-16 |
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| CN108592448A (en) * | 2018-05-22 | 2018-09-28 | 福建工程学院 | Synergy auto-cascading refrigeration system is pressed in a kind of injector |
| CN108895701A (en) * | 2018-07-19 | 2018-11-27 | 广东志高暖通设备股份有限公司 | A kind of band sprays the refrigerating heat pump circulating energy-saving device of device |
| CN108895700A (en) * | 2018-07-19 | 2018-11-27 | 广东志高暖通设备股份有限公司 | A kind of multiple injection hot pump in low temp energy conserving system with injector |
| CN112268376A (en) * | 2020-09-15 | 2021-01-26 | 珠海格力电器股份有限公司 | Fluorine pump type heat pipe and jet refrigeration cycle composite system and control method thereof |
| CN113418223A (en) * | 2021-05-24 | 2021-09-21 | 青岛腾远设计事务所有限公司 | Multi-water-temperature-working-condition air source heat pump unit and air source heat pump heating system |
| CN115420039A (en) * | 2022-09-29 | 2022-12-02 | 江苏亚拓新能源科技有限公司 | Extremely cold cascade type heat pump control method |
| CN115420039B (en) * | 2022-09-29 | 2024-02-13 | 江苏亚拓新能源科技有限公司 | Extremely-cold cascade heat pump control method |
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