CN107091529A - The low high water temperature combined type of circumstance temperature melts the CO of frost2Heat pump - Google Patents

The low high water temperature combined type of circumstance temperature melts the CO of frost2Heat pump Download PDF

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Publication number
CN107091529A
CN107091529A CN201710343728.8A CN201710343728A CN107091529A CN 107091529 A CN107091529 A CN 107091529A CN 201710343728 A CN201710343728 A CN 201710343728A CN 107091529 A CN107091529 A CN 107091529A
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CN
China
Prior art keywords
compressor
heat exchanger
stop valve
valve
throttle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201710343728.8A
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Chinese (zh)
Inventor
于振国
覃业雄
张孙阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Jialisi Weimu New Energy Technology Co Ltd
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Hangzhou Jialisi Weimu New Energy Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Jialisi Weimu New Energy Technology Co Ltd filed Critical Hangzhou Jialisi Weimu New Energy Technology Co Ltd
Priority to CN201710343728.8A priority Critical patent/CN107091529A/en
Publication of CN107091529A publication Critical patent/CN107091529A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F25B2347/023—Set point 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves

Abstract

The invention discloses the CO that a kind of low high water temperature combined type of circumstance temperature melts frost2Heat pump, belongs to CO2Heat pump heats circulating technology field, and existing heat pump generally realizes source pump low temperature defrost, CO using four-way valve reverse flow technique2Because system pressure is higher than, conventional several times can not realize four-way valve commutation defrosting to heat pump, the present invention proposes that a kind of combined type intelligently melts the mode of frost, when system detectio to evaporator reaches molten ice-lolly part, change refrigerant circulation direction, HTHP refrigerant is flowed to evaporator with heat pump and enter molten white pattern, the liquid refrigerants of reflux compressor evaporates the heat for absorbing user's heat source side by plate type heat exchanger, melts air-source CO to reach2The frost on heat pump heat exchanger surface.This can significantly improve the high water temperature CO of low circumstance temperature using new2The white efficiency of the appearance of heat pump, the molten frost time is short and thorough, for the high water temperature air-source CO of low circumstance temperature2The reliable energy-efficient operation of heat pump provides a kind of technical scheme.

Description

The low high water temperature combined type of circumstance temperature melts the CO of frost2Heat pump
Technical field
The present invention relates to the CO that a kind of low high water temperature combined type of circumstance temperature melts frost2Heat pump, particularly a kind of low circumstance temperature is high Water temperature combined type melts the CO of frost2Heat pump and combined type intelligently melt white mode, can realize and produce high-temperature-hot-water below -20 ° of circumstance temperature.
Background technology
As scientific and technological progress, human living standard's raising and world environments drastically deteriorate, the whole world drastically will to energy-conserving and environment-protective Summation is paid attention to, CO2By the advantage such as its environmentally friendly, safe and stable, thermodynamic properties is good, in heat-pump hot-water, air conditioning for automobiles, cold chain etc. Field industrialized development is more rapid.The country such as Japan, Europe relevant laws and regulations are progressively set up, CO2Teat pump boiler product is very early Just put goods on the market, the CO for China2Correlation technique and product are in be bred and starts developing stage, but due to CO2Heat pump System balancing and the more conventional heat pump of operating pressure are higher by several times, although there are many CO the country now2Heat pump application case, but It is limited to some technical bottlenecks, CO2Heat-pump apparatus also has very big technical bottleneck to go in terms of practicality, stability, reliability Break through, wherein the one of most critical core is exactly the molten white technology of low temperature.Nowadays Some Enterprises use hot-gas bypass, electrical heating, height All there is shortcoming and technical difficulty in warm Water spray and overlapping defrost, conventional heat pump can make condensation by four-way valve commutation Device, evaporator call role to realize, but CO2Heat pump balances pressure and operating pressure is high, to the mechanicalness of related valve member Very high with sealing requirements, related valve member technical bottleneck does not break through also, and market does not have related accessory selling, therefore combined type intelligence Can molten frost CO2The proposition and application of heat pump solve hot-gas bypass, electrical heating, high-temperature-hot-water spray and overlapping well Defrost efficiency is low, and defrost the not thorough and more difficult technical barrier of industrialization.
Existing heat pump generally realizes source pump low temperature defrost, CO using four-way valve reverse flow technique2Heat pump is because being System pressure, which is higher than conventional several times, can not realize four-way valve commutation defrosting.
The content of the invention
The technical problem to be solved in the present invention is to overcome existing hot-gas bypass, electrical heating, high temperature with the technical assignment proposed Heat water-spraying and overlapping defrost efficiency are low, there is provided a kind of low high water temperature of circumstance temperature for the not more difficult defect of thorough, industrialization that defrosts Combined type melts the CO of frost2Heat pump, to improve CO2The adaptability of heat pump operation stability and wide condition range.
To reach above-mentioned purpose, the high water temperature combined type of low circumstance temperature of the invention melts the CO of frost2Heat pump, including compressor, change Hot device, first throttle valve, second throttle, the 3rd choke valve, the first stop valve, the second stop valve, evaporative condenser, board-like change Hot device, attemperater, water circulating pump, described heat exchanger have CO2Refrigerant passage, hot water channel, described plate type heat exchanger With CO2Refrigerant passage, circulating hot water passage, it is characterized in that：
The compressor is twin-stage rotor compressor, the high-pressure side of compressor, the CO of heat exchanger2Refrigerant passage, first throttle valve, Evaporative condenser, the first stop valve, the low-pressure side pipeline connection successively of the compressor；
The CO of the plate type heat exchanger2One end pipeline of refrigerant passage is connected to the low-pressure side of first stop valve and compressor Between, the CO of the plate type heat exchanger2The other end of refrigerant passage is connected to described first through described second throttle pipeline Between choke valve and evaporative condenser；
Water circulating pump described in the circulating hot water passage tube connection of the plate type heat exchanger, and the circulation of the plate type heat exchanger Hot water channel, water circulating pump pipeline connection attemperater constitute combined type and melt defrosting system, and the combined type is melted in the pipeline of defrosting system Connect the 3rd choke valve；
The second described stop valve pipeline is connected between the high-pressure side of the compressor and evaporative condenser；
The hot water channel of the heat exchanger is connected in high-temperature-hot-water preparation system；
A unlatching, another closing in first stop valve, the second stop valve coordinate the first throttle valve, second section Stream valve in one open, another close with change refrigerant from the compressor outflow after flow direction.
It is used as optimization technique means：The first described stop valve is opened, the second stop valve is closed, described first throttle valve Open, second throttle is closed, and makes high-pressure side, the CO of heat exchanger of the compressor2Refrigerant passage, first throttle valve, evaporation Condenser, the first stop valve, pipeline connects and composes the high water temperature CO of low circumstance temperature to the low-pressure side of the compressor successively2Heat pump cycle is returned Road.
It is used as optimization technique means：The second described stop valve is opened, the first stop valve is closed, described second throttle Open, first throttle valve is closed, and makes the high-pressure side of the compressor, the second stop valve, evaporative condenser, second throttle, plate The CO of formula heat exchanger2Refrigerant passage, pipeline connects and composes molten defrosting system to the low-pressure side of compressor successively, makes to heat circulating refrigerant suction The heat for receiving the circulating hot water passage offer of plate type heat exchanger comes for the molten frost of described condenser/evaporator.
It is used as optimization technique means：In high environment temperature, the second described stop valve is closed, the first stop valve is opened, Second throttle is closed, first throttle valve is opened, described water pump is closed, the high-pressure side of described compressor, heat exchanger CO2It is cold Matchmaker's passage, first throttle valve, evaporative condenser, the first stop valve, pipeline connects and composes CO to the low-pressure side of compressor successively2Refrigerant Circulation loop, is that user produces high-temperature-hot-water.
It is used as optimization technique means：In low ambient temperature, the second described stop valve is closed, the first stop valve is opened, Second throttle is closed, first throttle valve is opened, described water pump is closed, the high-pressure side of described compressor, heat exchanger CO2It is cold Matchmaker's passage, first throttle valve, evaporative condenser, the first stop valve, pipeline connects and composes CO to the low-pressure side of compressor successively2Refrigerant Circulation loop, is that user produces high-temperature-hot-water；
When sensor judges to reach defrosting condition, the first stop valve is closed, the second stop valve is opened, closes first throttle valve, The high-pressure side of compressor, the second stop valve, condenser/evaporator, second throttle, the CO of plate type heat exchanger2Refrigerant passage, compression Pipeline connects and composes the molten white medium side circulatory system to the low-pressure side of machine successively, by attemperater, water circulating pump, the 3rd choke valve, Plate type heat exchanger circulating hot water passage connection composition heat-source Cycles system, the CO of plate type heat exchanger2Refrigerant passage is followed by absorbing The heat of ring hot water channel completes defrosting operating condition.
Instant invention overcomes hot-gas bypass, electrical heating, high-temperature-hot-water spray and overlapping defrost efficiency are low, defrost not thorough And the more difficult technical task of industrialization, improve CO2Stability, reliability, the economy of heat pump, accelerate the marketization Popularization, a kind of low high water temperature combined type of circumstance temperature of the invention intelligently melts the CO of frost2Heat pump and combined type intelligently melt white mode, easily It is simple and compact for structure in realization, it is stable and reliable for performance.
Brief description of the drawings
Fig. 1 is the CO that the low high water temperature combined type of circumstance temperature of the invention melts frost2The theory structure schematic diagram of heat pump；
Label declaration in figure：1- compressors；2- heat exchangers；31- first throttle valves；32- second throttle；The choke valves of 33- the 3rd； The stop valves of 34- first；The stop valves of 35- second；4- evaporative condensers；5- plate type heat exchangers；6- attemperaters；7- water circulating pumps.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described.
As shown in figure 1, the high water temperature combined type of low circumstance temperature of the present invention melts the CO of frost2Heat pump, including compressor 1, heat exchanger 2nd, first throttle valve 31, second throttle 32, the 3rd choke valve 33, the first stop valve 34, the second stop valve 35, evaporative condenser 4th, plate type heat exchanger 5, attemperater 6, water circulating pump 7, heat exchanger 2 have CO2Refrigerant passage, hot water channel, plate type heat exchanger 5 With CO2Refrigerant passage, circulating hot water passage；
Compressor 1 is twin-stage rotor compressor, the high-pressure side of compressor 1, the CO of heat exchanger 22Refrigerant passage, first throttle valve 31st, the low-pressure side pipeline connection successively of evaporative condenser 4, the first stop valve 34, compressor 1；
The CO of plate type heat exchanger 52One end pipeline of refrigerant passage be connected to the first stop valve 34 and compressor 1 low-pressure side it Between, the CO of plate type heat exchanger 52The other end of refrigerant passage is connected to first throttle valve 31 and evaporation through the pipeline of second throttle 32 Between condenser 4；
The circulating hot water passage tube connection water circulating pump 7 of plate type heat exchanger 5, and the circulating hot water passage of plate type heat exchanger 5, follow The combined type that the pipeline of ring water pump 7 connection attemperater 6 constitutes melts defrosting system, and the combined type, which is melted in the pipeline of defrosting system, connects Section three Flow valve 33；
The pipeline of second stop valve 35 is connected between the high-pressure side of compressor 1 and evaporative condenser 4；
The hot water channel of heat exchanger 2 is connected in high-temperature-hot-water preparation system；
A unlatching, another closing in first stop valve 34, the second stop valve 35 coordinate first throttle valve 31, second to throttle One in valve 32 open, another closes to change refrigerant from the flow direction after the outflow of compressor 1.
First stop valve 34 is opened, the second stop valve 35 is closed, and first throttle valve 31 is opened, second throttle 32 is closed, Make high-pressure side, the CO of heat exchanger 2 of compressor 12Refrigerant passage, first throttle valve 31, evaporative condenser 4, the first stop valve 34, Pipeline connects and composes the high water temperature CO of low circumstance temperature to the low-pressure side of compressor 1 successively2Heat pump cycle loop.
Second stop valve 35 is opened, the first stop valve 34 is closed, and second throttle 32 is opened, first throttle valve 31 is closed, Make the high-pressure side of compressor 1, the second stop valve 35, evaporative condenser 4, second throttle 32, the CO of plate type heat exchanger 52Refrigerant Passage, pipeline connects and composes molten defrosting system to the low-pressure side of compressor 1 successively, makes to heat circulating refrigerant and absorbs plate type heat exchanger 5 The heat that circulating hot water passage is provided comes for the molten frost of condenser/evaporator 4.
In high environment temperature (be more than or equal to 15 degrees Celsius, less than or equal to 43 degrees Celsius), the second stop valve 35 closes, First stop valve 34 is opened, second throttle 32 is closed, first throttle valve 31 is opened, water pump 7 is closed, the high-pressure side of compressor 1, The CO of heat exchanger 22Refrigerant passage, first throttle valve 31, evaporative condenser 4, the first stop valve 34, compressor 1 low-pressure side according to Secondary pipeline connects and composes CO2Refrigerant circulation circuit, is that user produces high-temperature-hot-water（90 degrees Celsius of hot water）.
In low ambient temperature (be more than or equal to -25 degrees Celsius, less than -15 degrees Celsius), the second stop valve 35 closes, the One stop valve 34 is opened, second throttle 32 is closed, first throttle valve 31 is opened, water pump 7 is closed, and the high-pressure side of compressor 1, is changed The CO of hot device 22Refrigerant passage, first throttle valve 31, evaporative condenser 4, the first stop valve 34, compressor 1 low-pressure side successively Pipeline connects and composes CO2Refrigerant circulation circuit, is that user produces high-temperature-hot-water（65 degrees Celsius of hot water）；
When sensor judges to reach defrosting condition, the first stop valve 34 is closed, the second stop valve 35 is opened, closes first throttle Valve 31, the high-pressure side of compressor 1, the second stop valve 35, condenser/evaporator 4, second throttle 32, the CO of plate type heat exchanger 52It is cold Matchmaker's passage, pipeline connects and composes the molten white medium side circulatory system to the low-pressure side of compressor 1 successively, by attemperater 6, water circulating pump 7th, the 3rd choke valve 33, the circulating hot water passage of plate type heat exchanger 5 connection composition heat-source Cycles system, the CO of plate type heat exchanger 52It is cold Matchmaker's passage completes defrosting operating condition by the heat of absorption cycle hot water channel.
The present invention proposes that a kind of combined type intelligently melts the mode of frost, when system detectio to evaporator reaches molten ice-lolly part, Change refrigerant circulation direction, HTHP refrigerant is flowed to evaporator with heat pump and enter molten white pattern, the liquid of reflux compressor is cold Matchmaker evaporates the heat for absorbing user's heat source side by plate type heat exchanger, melts air-source CO to reach2Heat pump heat exchanger surface Frost.This can significantly improve the high water temperature CO of low circumstance temperature using new2The white efficiency of the appearance of heat pump, the molten frost time is short and thorough, is The low high water temperature air-source CO of circumstance temperature2The reliable energy-efficient operation of heat pump provides a kind of technical scheme.

Claims (5)

1. the low high water temperature combined type of circumstance temperature melts the CO of frost2Heat pump, including compressor（1）, heat exchanger（2）, first throttle valve（31）、 Second throttle（32）, the 3rd choke valve（33）, the first stop valve（34）, the second stop valve（35）, evaporative condenser（4）, plate Formula heat exchanger（5）, attemperater（6）, water circulating pump（7）, described heat exchanger（2）With CO2Refrigerant passage, hot water channel, Described plate type heat exchanger（5）With CO2Refrigerant passage, circulating hot water passage, it is characterized in that：
The compressor（1）For twin-stage rotor compressor, compressor（1）High-pressure side, heat exchanger（2）CO2Refrigerant passage, One choke valve（31）, evaporative condenser（4）, the first stop valve（34）, the compressor（1）Low-pressure side successively pipeline connect；
The plate type heat exchanger（5）CO2One end pipeline of refrigerant passage is connected to first stop valve（34）With compressor （1）Low-pressure side between, the plate type heat exchanger（5）CO2The other end of refrigerant passage is through described second throttle（32） Pipeline is connected to the first throttle valve（31）With evaporative condenser（4）Between；
The plate type heat exchanger（5）The described water circulating pump of circulating hot water passage tube connection（7）, and the plate type heat exchanger （5）Circulating hot water passage, water circulating pump（7）Pipeline connects attemperater（6）Constitute combined type and melt defrosting system, the combined type melts The 3rd choke valve is connected in the pipeline of defrosting system（33）；
The second described stop valve（35）Pipeline is connected to the compressor（1）High-pressure side and evaporative condenser（4）Between；
The heat exchanger（2）Hot water channel be connected in high-temperature-hot-water preparation system；
First stop valve（34）, the second stop valve（35）In one open, another is closed and coordinates described first throttle Valve（31）, second throttle（32）In one open, another is closed to change refrigerant from the compressor（1）After outflow Flow direction.
2. the high water temperature combined type of low circumstance temperature according to claim 1 melts the CO of frost2Heat pump, it is characterized in that：Described first section Only valve（34）Unlatching, the second stop valve（35）Close, described first throttle valve（31）Unlatching, second throttle（32）Close, Make the compressor（1）High-pressure side, heat exchanger（2）CO2Refrigerant passage, first throttle valve（31）, evaporative condenser（4）、 First stop valve（34）, the compressor（1）Low-pressure side pipeline connects and composes the high water temperature CO of low circumstance temperature successively2Heat pump cycle is returned Road.
3. the high water temperature combined type of low circumstance temperature according to claim 1 melts the CO of frost2Heat pump, it is characterized in that：Described second section Only valve（35）Unlatching, the first stop valve（34）Close, described second throttle（32）Unlatching, first throttle valve（31）Close, Make the compressor（1）High-pressure side, the second stop valve（35）, evaporative condenser（4）, second throttle（32）, plate-type heat-exchange Device（5）CO2Refrigerant passage, compressor（1）Low-pressure side pipeline connects and composes molten defrosting system successively, make to heat circulating refrigerant suction Receive plate type heat exchanger（5）Circulating hot water passage provide heat come for described condenser/evaporator（4）Molten frost.
4. the high water temperature combined type of low circumstance temperature according to claim 1 melts the CO of frost2Heat pump, it is characterized in that：In high environment temperature When, the second described stop valve（35）Closing, the first stop valve（34）Unlatching, second throttle（32）Closing, first throttle valve （31）Unlatching, described water pump（7）Close, described compressor（1）High-pressure side, heat exchanger（2）CO2Refrigerant passage, first Choke valve（31）, evaporative condenser（4）, the first stop valve（34）, compressor（1）Low-pressure side pipeline connects and composes CO successively2 Refrigerant circulation circuit, is that user produces high-temperature-hot-water.
5. the high water temperature combined type of low circumstance temperature according to claim 1 melts the CO of frost2Heat pump, it is characterized in that：In low ambient temperature When, the second described stop valve（35）Closing, the first stop valve（34）Unlatching, second throttle（32）Closing, first throttle valve （31）Unlatching, described water pump（7）Close, described compressor（1）High-pressure side, heat exchanger（2）CO2Refrigerant passage, first Choke valve（31）, evaporative condenser（4）, the first stop valve（34）, compressor（1）Low-pressure side pipeline connects and composes CO successively2 Refrigerant circulation circuit, is that user produces high-temperature-hot-water；
When sensor judges to reach defrosting condition, the first stop valve is closed（34）, open the second stop valve（35）, close first Choke valve（31）, compressor（1）High-pressure side, the second stop valve（35）, condenser/evaporator（4）, second throttle（32）, it is board-like Heat exchanger（5）CO2Refrigerant passage, compressor（1）Low-pressure side pipeline connects and composes the molten white medium side circulatory system successively, by Attemperater（6）, water circulating pump（7）, the 3rd choke valve（33）, plate type heat exchanger（5）Circulating hot water passage connection composition thermal source The circulatory system, plate type heat exchanger（5）CO2Refrigerant passage completes defrosting operating condition by the heat of absorption cycle hot water channel.
CN201710343728.8A 2017-05-16 2017-05-16 The low high water temperature combined type of circumstance temperature melts the CO of frost2Heat pump Withdrawn CN107091529A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710343728.8A CN107091529A (en) 2017-05-16 2017-05-16 The low high water temperature combined type of circumstance temperature melts the CO of frost2Heat pump

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Application Number Priority Date Filing Date Title
CN201710343728.8A CN107091529A (en) 2017-05-16 2017-05-16 The low high water temperature combined type of circumstance temperature melts the CO of frost2Heat pump

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Publication Number Publication Date
CN107091529A true CN107091529A (en) 2017-08-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111998430A (en) * 2020-09-10 2020-11-27 清华大学 Self-defrosting air source heat pump unit and operation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111998430A (en) * 2020-09-10 2020-11-27 清华大学 Self-defrosting air source heat pump unit and operation method thereof
CN111998430B (en) * 2020-09-10 2024-04-23 清华大学 Self-defrosting air source heat pump unit and operation method thereof

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Application publication date: 20170825