CN107101407A - A kind of high energy efficiency ultra-low temperature air source CO2Heat pump - Google Patents
A kind of high energy efficiency ultra-low temperature air source CO2Heat pump Download PDFInfo
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- CN107101407A CN107101407A CN201710344876.1A CN201710344876A CN107101407A CN 107101407 A CN107101407 A CN 107101407A CN 201710344876 A CN201710344876 A CN 201710344876A CN 107101407 A CN107101407 A CN 107101407A
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- gas
- liquid
- heat pump
- liquid separator
- throttle
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
-
- 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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
Abstract
The invention discloses a kind of high energy efficiency ultra-low temperature air source CO2Heat pump, existing conventional heat pump water heater product is unable to hot water preparing under environment temperature of extremely trembling with fear, and the refrigerant circulation heating that the present invention is connected to form by double-stage compressor, auxiliary exchanger, throttle valve element, special gas-liquid separator improves CO2The heating capacity and efficiency of air source heat pump, reduce whole CO2The temperature of the cold side of air source heat pump system, pressure, so as to reduce system power dissipation, improve the stability of a system.Key of the present invention also resides in the use of auxiliary exchanger and gas-liquid separator, on the one hand the preceding supercooling that throttles is carried out to main circulation loop refrigerant, increase enthalpy difference, on the other hand by high temperature refrigerant in subsidiary loop to the suitably preheating of liquid refrigerants in gas-liquid separator and flash distillation increase inspiratory capacity, so that it is guaranteed that CO2Net for air-source heat pump units high efficient and reliable stable operation under environment of extremely trembling with fear.
Description
Technical field
The invention belongs to ultralow temperature CO2Heat pump circulating system, particularly a kind of high energy efficiency ultra-low temperature air source CO2Heat pump.
Background technology
Traditional heat pump water heater system is mainly made up of compressor, choke valve, evaporator and condenser, groundwork
Principle is：Refrigerant absorbs the heat of cryogenic object in evaporator, flashes to gas media, the gas media that evaporator comes out
By the compression of compressor, it is changed into the gas media of HTHP, the gas media of HTHP within the condenser release heat energy
Put to high temp objects, while itself be changed into highly pressurised liquid media, the expanded valve reducing pressure by regulating flow of highly pressurised liquid Media Stream, then be changed into
Hot liquid media, into evaporator, so circulation.
With the raising of progress and the people's awareness of saving energy of science and technology, in recent years, Teat pump boiler market development is rapid, Europe
The area CO such as U.S., Japan2Air source hot pump water heater is in the existing certain market capacity in market.CO2Air source hot pump water heater is in state
Interior increasing producer starts input research and development, because of air source heat pump product at low ambient temperatures, and heating capacity decay is obvious, energy
Effect declines rapidly, and conventional heat pump generally solves the problems, such as unit operation under low temperature environment, but working environment using enthalpy-increasing compressor
Temperature can only produce 55 ° of hot water for more than -20 °, and in the north, extremely cold less than -20 ° regional civilian and commercial kitchen areas exist larger
The market space and application value, but conventional heat pump in such circumstances can not normally smooth working run, so solve extremely tremble with fear temperature
The problem of lower heat pump ability decay of degree and relatively low efficiency, is particularly important.
Normal air source source pump is due to compressed machine range of operation, operation characteristic and the limitation of requirement, in outdoor temp
Degree is less than in the case of -15 °, and heating capacity and the efficiency decay of unit are obvious, and at low ambient temperatures, heat pump can also
There is back the problems such as liquid, delivery temperature are high, over range is run, but common heat pump passes through increasing enthalpy skill by reforming compressor arrangement
Art makes the ability of heat pump at low ambient temperatures have part to improve, and can work operation in the environment of -20 °, substantially meet correlation
Function, but steady operation operation is still unable under lower environment temperature, it is true based on more than to solve under ultra-low temperature surroundings
The technical bottleneck such as the decline of unit heating capacity, low, the defrost oil return difficulty of efficiency seem particularly eager and important.
The content of the invention
The technical problem to be solved in the present invention is to overcome existing conventional heat pump water heater product to exist with the technical assignment proposed
Being unable to the defect of hot water preparing under environment temperature of extremely trembling with fear, there is provided a kind of high energy efficiency ultra-low temperature air source CO2Heat pump.
To reach above-mentioned purpose, high energy efficiency ultra-low temperature air source CO of the invention2Heat pump, including double-stage compressor, gas
Cooler, liquid memory, auxiliary exchanger, first throttle valve, second throttle, evaporator, gas-liquid separator, its feature
It is：
Described gas cooler has CO2Refrigerant passage, hot water circuit passage；
Described liquid memory has A1 inlets, B1 liquid outlets, C1 liquid outlets；
Described auxiliary exchanger has two independent mutually CO2 refrigerant passages；
Described evaporator has CO2Refrigerant passage；
Described gas-liquid separator has A2 inlets, B2 inlets, C2 liquid outlets；
The CO of the gas cooler2The two ends of refrigerant passage connect the high-pressure side of the double-stage compressor, fluid storage respectively
The A1 inlets of device, the C1 liquid outlets of the liquid memory, a CO of auxiliary exchanger2Refrigerant passage, first throttle valve,
The CO of evaporator2Refrigerant passage, the A2 inlets of gas-liquid separator are sequentially connected, the C2 liquid outlets connection of the gas-liquid separator
The low pressure of the double-stage compressor is surveyed, and constitutes major loop, and described first throttle valve controls the reducing pressure by regulating flow of main refrigerant circuit；
B1 liquid outlets, second throttle, another CO of auxiliary exchanger of the liquid memory2Refrigerant passage, gas-liquid point
B2 inlets from device are sequentially connected, and constitute subsidiary loop, and described second throttle controls the reducing pressure by regulating flow of subsidiary loop.
It is used as optimization technique means：Close second throttle, CO2Heat pump by described double-stage compressor, gas cooler,
Liquid reservoir, auxiliary exchanger, first throttle valve, evaporator, gas-liquid separator constitute normal temperature heating recycle system, for normal
Hot water preparing when advising environment temperature.
It is used as optimization technique means：Close second throttle, CO2Heat pump by described double-stage compressor, gas cooler,
Liquid reservoir, auxiliary exchanger, first throttle valve, evaporator, gas-liquid separator constitute normal temperature heating recycle system, while by
The liquid memory, second throttle, auxiliary exchanger, gas-liquid separator composition increase gas oil return accessory system, by described
Normal temperature heating recycle system, increasing gas oil return accessory system work simultaneously, hot water preparing during for low ambient temperature.
It is used as optimization technique means：The hot water circuit passage of the gas cooler is closed, cold by double-stage compressor, gas
But device, liquid memory, auxiliary exchanger, first throttle valve, evaporator, gas-liquid separator constitute major loop defrosting system, together
When by second throttle, auxiliary exchanger, gas-liquid separator constitute increasing gas lift temperature auxiliary defrosting system, pass through the major loop
Defrosting system, the defrost for increasing the extremely cold environment of gas lift temperature auxiliary defrosting system work realization simultaneously.
It is used as optimization technique means：The C2 liquid outlets of the gas-liquid separator are connected with inside the gas-liquid separator
Suction line, have oil return hole in described suction line.
Main circulation loop refrigerant is subcooled by auxiliary exchanger in one aspect of the present invention, and increase evaporation enthalpy difference is on the other hand logical
Auxiliary circulation loop evaporation endothermic increase compressor return air amount is crossed, and then improves the heating capacity and efficiency of heat pump, and reduces heat pump
System cold side temperature, pressure, reduce system power dissipation, improve the stability of a system.
The technical barrier of hot water preparing can not normally be run by solving northern extremely cold area air source heat pump, be air-source
CO2Heat pump with popularization has stepped solid step forward in the application of northern area.The CO of the present invention2Heat pump environment temperature below -20 °
Degree is lower efficiently to produce 65 ° to 90 ° of high-temperature-hot-water, and stable defrost is thoroughly, simple and compact for structure, it is easy to accomplish,
There is preferable performance at low ambient temperatures.
Brief description of the drawings
Fig. 1 is the schematic diagram of high energy efficiency ultra-low temperature air source CO2 heat pumps of the present invention；
Label declaration in figure：1- double-stage compressors；2- gas coolers；3- liquid memories；4- auxiliary exchangers；5.1- first
Choke valve；5.2- second throttle；6- evaporators；7- gas-liquid separators.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described, and the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only to invent a part of embodiment, rather than whole embodiments.
Based on the embodiment in the present invention, those of ordinary skill in the art do not make that creative work premise obtained it is all its
His embodiment, belongs to the scope of the present invention.
High energy efficiency ultra-low temperature air source CO as shown in Figure 12Heat pump, including double-stage compressor 1, gas cooler 2, liquid
Holder 3, auxiliary exchanger 4, first throttle valve 5.1, second throttle 5.2, evaporator 6, gas-liquid separator 7；
Gas cooler 2 has CO2Refrigerant passage, hot water circuit passage；
Liquid memory 3 has A1 inlets, B1 liquid outlets, C1 liquid outlets；
Auxiliary exchanger 4 has two independent mutually CO2Refrigerant passage；
Evaporator 6 has CO2Refrigerant passage；
Gas-liquid separator 7 has A2 inlets, B2 inlets, C2 liquid outlets；
The CO of gas cooler 22The two ends of refrigerant passage connect the high-pressure side of double-stage compressor 1, the A1 of liquid memory 3 respectively
Inlet, the C1 liquid outlets of liquid memory 3, a CO of auxiliary exchanger 42Refrigerant passage, first throttle valve 5.1, evaporation
The CO of device 62Refrigerant passage, the A2 inlets of gas-liquid separator 7 are sequentially connected, the C2 liquid outlets connection twin-stage of gas-liquid separator 7
The low pressure of compressor 1 is surveyed, and constitutes major loop, and first throttle valve 5.1 controls the reducing pressure by regulating flow of main refrigerant circuit；
B1 liquid outlets, second throttle 5.2, another CO of auxiliary exchanger 4 of liquid memory 32Refrigerant passage, gas-liquid point
B2 inlets from device 7 are sequentially connected, and constitute subsidiary loop, and second throttle 5.2 controls the reducing pressure by regulating flow of subsidiary loop.
Close second throttle 5.2, CO2Heat pump is handed over by double-stage compressor 1, gas cooler 2, liquid reservoir 3, auxiliary
Parallel operation 4, first throttle valve 5.1, evaporator 6, gas-liquid separator 7 constitute normal temperature heating recycle system, for conventional environment temperature
（More than or equal to -15 °）When hot water preparing（65 ° to 90 °）.
Close second throttle 5.2, CO2Heat pump is handed over by double-stage compressor 1, gas cooler 2, liquid reservoir 3, auxiliary
Parallel operation 4, first throttle valve 5.1, evaporator 6, gas-liquid separator 7 constitute normal temperature heating recycle system, while by liquid memory
3rd, second throttle 5.2, auxiliary exchanger 4, the composition of gas-liquid separator 7 increase gas oil return accessory system, and circulation is heated by normal temperature
System, increasing gas oil return accessory system work simultaneously, for low ambient temperature（Less than -15 °, more than or equal to -35 °）When hot water preparing
（65 ° to 90 °）.
The hot water circuit passage of gas cooler 2 is closed, by double-stage compressor 1, gas cooler 2, liquid memory 3,
Auxiliary exchanger 4, first throttle valve 5.1, evaporator 6, gas-liquid separator 7 constitute major loop defrosting system, while by second section
Flow valve 5.2, auxiliary exchanger 4, the composition of gas-liquid separator 7 and increase gas lift temperature auxiliary defrosting system, by major loop defrosting system, increase
Gas lift temperature auxiliary defrosting system works simultaneously realizes the defrost for environment of extremely trembling with fear.
The C2 liquid outlets of gas-liquid separator 7, which are connected with the suction line inside gas-liquid separator 7, suction line, to be had
Oil return hole.In extremely low environment temperature, compressor and freeze oil exist viscosity become should not carry greatly, local delamination phenomenon, such as go out
Existing oil return can freely not cause compressor fault, and the structure design of this vertical many spill port of horizontal direction can increase refrigerant and be glued with big
Refrigeration oil contact area is spent, more refrigeration oils is carried back compressor with refrigerant；Even if moreover, refrigeration oil layering can also have very
Good oil return.
It is described above, it is only the present invention preferably embodiment, but the scope of the present invention is not limited thereto, it is any
Those familiar with the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in, and all should
It is included within the scope of the present invention.The scope of the present invention is defined by the protection domain of claims.
Claims (5)
1. a kind of high energy efficiency ultra-low temperature air source CO2Heat pump, including double-stage compressor（1）, gas cooler（2）, liquid memory
（3）, auxiliary exchanger（4）, first throttle valve（5.1）, second throttle（5.2）, evaporator（6）, gas-liquid separator（7）, its
It is characterized in：
Described gas cooler（2）With CO2Refrigerant passage, hot water circuit passage；
Described liquid memory（3）With A1 inlets, B1 liquid outlets, C1 liquid outlets；
Described auxiliary exchanger（4）With two independent mutually CO2Refrigerant passage；
Described evaporator（6）With CO2Refrigerant passage；
Described gas-liquid separator（7）With A2 inlets, B2 inlets, C2 liquid outlets；
The gas cooler（2）CO2The two ends of refrigerant passage connect the double-stage compressor respectively（1）High-pressure side, liquid
Holder（3）A1 inlets, the liquid memory（3）C1 liquid outlets, auxiliary exchanger（4）A CO2Refrigerant leads to
Road, first throttle valve（5.1）, evaporator（6）CO2Refrigerant passage, gas-liquid separator（7）A2 inlets be sequentially connected, institute
State gas-liquid separator（7）C2 liquid outlets connect the double-stage compressor（1）Low pressure survey, constitute major loop, described first
Choke valve（5.1）Control the reducing pressure by regulating flow of main refrigerant circuit；
The liquid memory（3）B1 liquid outlets, second throttle（5.2）, auxiliary exchanger（4）Another CO2Refrigerant leads to
Road, gas-liquid separator（7）B2 inlets be sequentially connected, constitute subsidiary loop, described second throttle（5.2）Control auxiliary
The reducing pressure by regulating flow in loop.
2. high energy efficiency ultra-low temperature air source CO according to claim 12Heat pump, it is characterized in that：Close second throttle
（5.2）, CO2Heat pump is by described double-stage compressor（1）, gas cooler（2）, liquid reservoir（3）, auxiliary exchanger（4）、
First throttle valve（5.1）, evaporator（6）, gas-liquid separator（7）Normal temperature heating recycle system is constituted, for conventional environment temperature
When hot water preparing.
3. high energy efficiency ultra-low temperature air source CO according to claim 12Heat pump, it is characterized in that：Close second throttle
（5.2）, CO2Heat pump is by described double-stage compressor（1）, gas cooler（2）, liquid reservoir（3）, auxiliary exchanger（4）、
First throttle valve（5.1）, evaporator（6）, gas-liquid separator（7）Normal temperature heating recycle system is constituted, while being stored up by the liquid
Storage（3）, second throttle（5.2）, auxiliary exchanger（4）, gas-liquid separator（7）Composition increases gas oil return accessory system, passes through
The normal temperature heating recycle system, increasing gas oil return accessory system work simultaneously, hot water preparing during for low ambient temperature.
4. high energy efficiency ultra-low temperature air source CO according to claim 12Heat pump, it is characterized in that：The gas cooler（2）
Hot water circuit passage close, by double-stage compressor（1）, gas cooler（2）, liquid memory（3）, auxiliary exchanger（4）、
First throttle valve（5.1）, evaporator（6）, gas-liquid separator（7）Major loop defrosting system is constituted, while by second throttle
（5.2）, auxiliary exchanger（4）, gas-liquid separator（7）Composition increases gas lift temperature auxiliary defrosting system, passes through the major loop defrost
System, the defrost for increasing the extremely cold environment of gas lift temperature auxiliary defrosting system work realization simultaneously.
5. high energy efficiency ultra-low temperature air source CO according to claim 12Heat pump, it is characterized in that：The gas-liquid separator（7）
C2 liquid outlets be connected with positioned at the gas-liquid separator（7）There is spill port in internal suction line, described suction line
Hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710344876.1A CN107101407A (en) | 2017-05-16 | 2017-05-16 | A kind of high energy efficiency ultra-low temperature air source CO2Heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710344876.1A CN107101407A (en) | 2017-05-16 | 2017-05-16 | A kind of high energy efficiency ultra-low temperature air source CO2Heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107101407A true CN107101407A (en) | 2017-08-29 |
Family
ID=59669797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710344876.1A Withdrawn CN107101407A (en) | 2017-05-16 | 2017-05-16 | A kind of high energy efficiency ultra-low temperature air source CO2Heat pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN107101407A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230213247A1 (en) * | 2022-01-02 | 2023-07-06 | AirMyne, Inc. | Using Carbon Dioxide From A Direct Air Capture System As A Low Global Warming Car And Industrial Refrigerant |
| US11801476B2 (en) | 2022-01-02 | 2023-10-31 | AirMyne, Inc. | Efficient and fully automated catalytic direct carbon dioxide capture from air system |
-
2017
- 2017-05-16 CN CN201710344876.1A patent/CN107101407A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230213247A1 (en) * | 2022-01-02 | 2023-07-06 | AirMyne, Inc. | Using Carbon Dioxide From A Direct Air Capture System As A Low Global Warming Car And Industrial Refrigerant |
| US11801476B2 (en) | 2022-01-02 | 2023-10-31 | AirMyne, Inc. | Efficient and fully automated catalytic direct carbon dioxide capture from air system |
| US11906227B2 (en) * | 2022-01-02 | 2024-02-20 | AirMyne, Inc. | Using carbon dioxide from a direct air capture system as a low global warming car and industrial refrigerant |
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Application publication date: 20170829 |
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