CN111174456A - Split overlapping type CO2Air source heat pump unit - Google Patents
Split overlapping type CO2Air source heat pump unit Download PDFInfo
- Publication number
- CN111174456A CN111174456A CN202010150223.1A CN202010150223A CN111174456A CN 111174456 A CN111174456 A CN 111174456A CN 202010150223 A CN202010150223 A CN 202010150223A CN 111174456 A CN111174456 A CN 111174456A
- Authority
- CN
- China
- Prior art keywords
- circulation loop
- heat pump
- outlet
- source heat
- pump unit
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 68
- 239000003507 refrigerant Substances 0.000 claims abstract description 33
- 238000010257 thawing Methods 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims description 11
- 230000008014 freezing Effects 0.000 abstract description 2
- 238000007710 freezing Methods 0.000 abstract description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 34
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 12
- 239000001569 carbon dioxide Substances 0.000 description 6
- 239000011555 saturated liquid Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
-
- 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
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- 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
- F25B41/31—Expansion 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a split cascade CO2The air source heat pump unit comprises a first circulating loop formed by sequentially connecting a first compressor, a gas cooler, an evaporative condenser, a first expansion valve, an economizer, a refrigerant pump, a heating device, an air side evaporator and an air suction electromagnetic valve; the second circulating loop is formed by connecting a second compressor, a condenser, a second expansion valve and an evaporative condenser in sequence; first circulation loop is filled with CO2Refrigerant, comprising CO2A heating circulation loop and a defrosting circulation loop; the second circulation loop is auxiliary heatingA circulation loop; the air side evaporator is disposed outdoors and the rest is disposed indoors. The invention can effectively improve the heating efficiency and the heating performance of the system under the condition of extremely low outdoor temperature, can perform efficient and low-consumption defrosting in the evaporator pipe, reduces the influence of unit noise on the outdoor environment, and simultaneously reduces the risk of freezing of the unit.
Description
Technical Field
The invention relates to the technical field of heat pumps, in particular to split cascade CO2An air source heat pump unit.
Background
Heating in winter is the basic living demand of residents in northern China, and coal-fired boilers are generally adopted for heating in the past. Due to the fact that the coal is low in energy utilization rate of combustion heating, combustion emission pollution is serious, and frequent haze weather is caused. In order to reduce air pollution and promote energy consumption revolution and supply side structural reform, the nation gradually starts coal-fired replacement work for clean heating from 2016, wherein an air source heat pump is popular in the market as a main coal-fired clean energy replacement mode.
In recent years, natural working medium carbon dioxide is more and more emphasized by the heat pump industry because of the advantages of no toxicity, incombustibility, ozone destruction potential value ODP of 0, global warming potential value GWP of 1, large heating capacity per unit volume, excellent conveying property and the like, and carbon dioxide is considered as one of the most potential natural working media in the working medium substitution of the heat pump system and has the critical temperature of 31 ℃. By virtue of the unique transcritical performance of the carbon dioxide heat pump system, even in a low-temperature air environment, hot water can enter the carbon dioxide heat pump system from 15 ℃ and be heated to 55 ℃, and the energy efficiency ratio of the carbon dioxide heat pump system is improved by 20% compared with that of an air source heat pump water heater with a conventional refrigerant, so that the carbon dioxide heat pump system is gradually applied to a domestic hot water heating system along with the mature technology. But only depends on single-stage compressed CO for meeting the requirements of small temperature difference high-temperature high-efficiency heating, particularly the heating in severe cold areas2Air source heat pump, which is not satisfactory.
Meanwhile, in the prior art, the defrosting generally adopts a mode of adding a second medium heat exchange copper pipe in the finned evaporator, and adopts the second medium for heating to remove frost formed on the surface of the air source heat exchanger, so that although the defrosting problem is solved, the defrosting efficiency is low, the defrosting time is long, and the defrosting heat loss is large.
In addition, when the heat pump unit operates, the noise of the heat pump unit greatly affects the outdoor environment, mainly the noise of the compressor, so that the capacity and the installation position of the heat pump unit are limited, and the popularization of the heat pump unit is greatly restricted.
Disclosure of Invention
The invention aims to provide a split cascade CO2Air source heat pump unit, in order to solve the problem that above-mentioned prior art exists, can effectively improve the heating efficiency and the system of system under the extremely low circumstances of outdoor temperatureThermal performance, and can be in CO2Defrosting is carried out in the evaporator pipe with high efficiency and low consumption, and the influence of unit noise on the outdoor environment is reduced.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a split cascade CO2The air source heat pump unit comprises a first circulating loop formed by sequentially connecting a first compressor, a gas cooler, an evaporative condenser, a first expansion valve, an economizer, a refrigerant pump, a heating device, an air side evaporator and an air suction electromagnetic valve; the second circulating loop is formed by connecting a second compressor, a condenser, a second expansion valve and an evaporative condenser in sequence;
the first circulation loop is filled with CO2Refrigerant, the first circulation circuit including CO2A heating circulation loop and a defrosting circulation loop; controlling the CO by opening and closing of the first expansion valve and the suction solenoid valve2Switching a heating circulation loop and the defrosting circulation loop;
the second circulation loop is an auxiliary heating circulation loop;
the air side evaporator is arranged outdoors, and the split cascade type CO is arranged outdoors2The rest part of the air source heat pump unit is arranged indoors.
Preferably, the evaporative condenser comprises a first inlet, a first outlet, a second inlet, a second outlet; a first inlet of the evaporative condenser is connected with an outlet of the gas cooler, and a first outlet of the evaporative condenser is connected with an inlet of the first expansion valve; and a second inlet of the evaporative condenser is connected with an outlet of the second expansion valve, and a second outlet of the evaporative condenser is connected with a gas return end of the second compressor.
Preferably, the economizer comprises a liquid outlet and a gas outlet; and a liquid outlet of the economizer is connected with an inlet of the refrigerant pump, and a gas outlet of the economizer is connected with an outlet of the air side evaporator and then connected with an inlet of the suction electromagnetic valve.
Preferably, the second circulation circuit is filled with R134a refrigerant to form a R134a heating circulation circuit.
Preferably, the gas cooler, the evaporative condenser and the condenser all adopt plate heat exchangers.
Preferably, the split cascade CO2The air source heat pump unit also comprises a control system, wherein the control system is used for controlling the CO according to the temperature of the environment2The operation of the heating circulation loop, the defrosting circulation loop and the auxiliary heating circulation loop.
The invention discloses the following technical effects:
(1) the invention adopts CO2The air source heat pump is used as a low-pressure heat pump for heat supply circulation, and R134a heat pump circulation is used as an auxiliary heating circulation loop, so that the heating performance of the heat pump unit can be effectively ensured under the condition of heating in severe cold areas;
(2) the invention adopts the refrigerant pump to provide circulating power for the refrigerant, effectively overcomes the pipeline conveying resistance and the pressure drop of the air side evaporator, and improves the suction pressure of the heat pump unit, thereby improving the heating and defrosting efficiency;
(3) the invention has the function of automatic defrosting, closes the air suction electromagnetic valve and the first expansion valve of the compressor and adopts an external heating device to heat CO2The refrigerant is heated, so that defrosting in the evaporator is realized, the medium in the heating device is heated by the return water in the gas cooler and the condenser, and the defrosting energy consumption is low;
(4) the invention realizes the separation of the host machine and the air side evaporator, the host machine is arranged in the machine room, and the air side evaporator is arranged on the spot, thereby greatly reducing the influence of the noise of the unit on the outdoor environment and simultaneously reducing the risk of freezing the unit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 shows a split cascade CO of the present invention2The overall structure schematic diagram of the air source heat pump unit;
FIG. 2 shows a split cascade CO of the present invention2Air source heat pump unit CO2A schematic structural diagram of a heating circulation loop;
FIG. 3 shows a split cascade CO of the present invention2The defrosting circulation loop of the air source heat pump unit is structurally schematic;
FIG. 4 shows a split cascade CO of the present invention2The air source heat pump unit R134a heating circulation loop structure schematic diagram;
wherein, 1, a first compressor; 2. a gas cooler; 3. an evaporative condenser; 4. a first expansion valve; 5. an economizer; 6. a refrigerant pump; 7. a heating device; 8. an air-side evaporator; 9. an air suction solenoid valve; 10. a second compressor; 11. a condenser; 12. a second expansion valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to FIGS. 1-4, the present embodiment provides a split cascade CO2The air source heat pump unit comprises a first compressor 1, a gas cooler 2, an evaporative condenser 3, a first expansion valve 4, an economizer 5, a refrigerant pump 6, a heating device 7, an air side evaporator 8, an air suction electromagnetic valve 9, a second compressor 10, a condenser 11 and a second expansion valve 12; the first compressor 1, the gas cooler 2, the evaporative condenser 3, the first expansion valve 4, the economizer 5, the refrigerant pump 6, the heating device 7, the air side evaporator 8, the suction solenoid valve9 are connected in sequence to form a first circulation loop; the second compressor 10, the condenser 11, the second expansion valve 12, and the evaporative condenser 3 are connected in sequence to form a second circulation circuit.
The first circulation loop is filled with CO2Refrigerant, the first circulation circuit including CO2A heating circulation loop and a defrosting circulation loop; controlling the CO by opening and closing the first expansion valve 4 and the suction solenoid valve 92Switching between a heating cycle and the defrost cycle.
The second circulation loop is an auxiliary heating circulation loop, and R134a refrigerant is filled in the second circulation loop to form an R134a heating circulation loop.
The heating device 7 is used for heating CO2The refrigerant is heated by heated CO2The refrigerant provides a heat source for defrosting the air side evaporator 8; the CO is2The heating circuit is operated with the heating device 7 switched off.
The air side evaporator 8 is arranged outdoors, and the split cascade type CO is arranged outdoors2The rest parts of the air source heat pump unit are arranged indoors, and CO is obtained by the refrigerant pump 6 due to long system pipeline and large resistance2The refrigerant provides the circulating power.
The evaporative condenser 3 comprises a first inlet, a first outlet, a second inlet and a second outlet; the economizer 5 comprises a liquid outlet and a gas outlet.
The specific connection relationship of the first circulation loop is as follows:
the exhaust end of the first compressor 1 is connected with the inlet of the gas cooler 2, the outlet of the gas cooler 2 is connected with the first inlet of the evaporative condenser 3, the first outlet of the evaporative condenser 3 is connected with the inlet of the first expansion valve 4, the outlet of the first expansion valve 4 is connected with the inlet of the economizer 5, the liquid outlet of the economizer 5 is connected with the inlet of the refrigerant pump 6, the outlet of the refrigerant pump 6 is connected with the inlet of the heating device 7, the outlet of the heating device 7 is connected with the inlet of the air side evaporator 8, the outlet of the air side evaporator 8 is connected with the inlet of the air suction electromagnetic valve 9 after the gas outlet of the economizer 5 is connected, and the outlet of the air suction electromagnetic valve 9 is connected with the air return end of the first compressor 1.
The specific connection relationship of the second circulation loop is as follows:
the exhaust end of the second compressor 10 is connected with the inlet of the condenser 11, the outlet of the condenser 11 is connected with the inlet of the second expansion valve 12, the outlet of the second expansion valve 12 is connected with the second inlet of the evaporative condenser 3, and the second outlet of the evaporative condenser 3 is connected with the air return end of the second compressor 10.
In a further optimized scheme, the heating device 7 adopts a medium heating device which is a plate-type heat exchanger or a shell-and-tube heat exchanger; the medium in the medium heating device is heated by the return water in the gas cooler 2 and the condenser 11;
in a further optimized scheme, the heating device 7 can also adopt an electric heating device.
Further optimize the scheme, gas cooler 2, condenser 11 all are connected with inlet tube and outlet pipe, the other end of inlet tube and outlet pipe is connected with the terminal radiator of user, gas cooler 2, condenser 11 are arranged in the water to the radiator of user side carries out the circulation heating.
Further, according to the optimized scheme, the gas cooler 2, the evaporative condenser 3 and the condenser 11 are all plate heat exchangers, so that the heat exchange performance is high, and the pressure bearing requirement of the system can be met.
In a further optimized scheme, the first expansion valve 4 and the second expansion valve 12 are electronic expansion valves, and can adjust the evaporation pressure and the suction superheat degree, so as to meet different working condition requirements.
Further optimizing the scheme, the split cascade CO2In the air source heat pump unit, the part except the air side evaporator 8 adopts a closed box body, and the inside of the closed box body is subjected to noise reduction treatment, so that the influence of the noise of a compressor of the unit on the indoor environment is reduced.
Further optimizing the scheme, the split cascade CO2The air source heat pump unit also comprises a control system, wherein the control system is used for controlling the CO according to the temperature of the environment2The operation of the heating circulation loop, the defrosting circulation loop and the auxiliary heating circulation loop is as follows:
running CO only when outdoor temperature is higher than 5 deg.C2A heating circulation loop;
outdoor temperature is more than-5 ℃ and less than 5 ℃, and CO is operated2A heating circulation loop and a defrosting circulation loop.
Outdoor temperature is lower than-5 ℃, and CO is operated2Heating circulation loop, defrosting circulation loop and auxiliary heating circulation loop.
The specific working principle of the first circulation loop is as follows:
opening the suction solenoid valve 9, the first expansion valve 4, closing the heating device 7, CO2The heating circulation loop works, as shown in fig. 2, the specific principle is as follows:
the first compressor 1 compresses high-temperature and high-pressure CO2The refrigerant is discharged and enters the gas cooler 2; high temperature and high pressure CO2After being cooled by the gas cooler 2, the refrigerant enters the evaporative condenser 3 through a first inlet of the evaporative condenser 3; evaporative condenser 3 pairs of CO2The refrigerant is further cooled and enters the first expansion valve 4 through the first outlet of the evaporative condenser 3; the throttling and pressure reduction through the first expansion valve 4 form CO2A gas-liquid mixture; CO 22The gas-liquid mixture is separated into CO by an economizer 52Saturated liquid and CO2A saturated gas; CO 22Saturated liquid flows out of the liquid outlet of the economizer 5, CO2Saturated gas flows out of the gas outlet of the economizer 5.
CO flowing from the economizer 52The saturated liquid is delivered by a refrigerant pump 6, passed through a heating device 7 and into an air side evaporator 8, CO2The saturated liquid absorbs heat from the air-side evaporator 8 and then becomes CO2A gas.
CO flowing from the economizer 52Saturated gas, CO flowing from the air side evaporator 82The gas is mixed and enters the first compressor 1 through the air suction electromagnetic valve 9 to complete CO2And (4) heating circulation.
Closing the suction solenoid valve 9, the first expansion valve 4, opening the heating device 7, and operating the defrosting circulation loop, as shown in fig. 3, the specific principle is as follows:
CO flowing from the economizer 52The saturated liquid is conveyed into a heating device 7 by a refrigerant pump 6, and CO2After being heated by the heating device 7, the saturated liquid enters the air side evaporator 8 and releases heat, and the frost layer on the air side is heated and removed; CO from the air side evaporator 82The refrigerant enters the economizer 5 through a gas outlet of the economizer 5 to complete a defrost cycle.
The working principle of the second circulation loop is shown in fig. 4, and the specific principle is as follows:
the second compressor 10 discharges the R134a refrigerant having a high temperature and a high pressure, and enters the condenser 11; the high-temperature and high-pressure R134a refrigerant is cooled by the condenser 11 and then enters the second expansion valve 12; the throttling and pressure reduction through the second expansion valve 12 form an R134a gas-liquid mixture, and the mixture enters the evaporative condenser 3 through a second inlet of the evaporative condenser 3; the evaporative condenser 3 heats the R134a gas-liquid mixture to form R134a gas; the R134a gas enters the second compressor 10 through the second outlet of the evaporative condenser 3, completing one R134a heating cycle.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (6)
1. Split overlapping type CO2The air source heat pump unit is characterized by comprising a first circulation loop formed by sequentially connecting a first compressor (1), a gas cooler (2), an evaporative condenser (3), a first expansion valve (4), an economizer (5), a refrigerant pump (6), a heating device (7), an air side evaporator (8) and an air suction electromagnetic valve (9); the system also comprises a second circulation loop formed by connecting a second compressor (10), a condenser (11), a second expansion valve (12) and an evaporative condenser (3) in sequence;
the first circulation loop is filled with CO2Refrigerant, the first circulation circuit including CO2A heating circulation loop and a defrosting circulation loop; controlling the CO by opening and closing of the first expansion valve (4) and the suction solenoid valve (9)2Switching a heating circulation loop and the defrosting circulation loop;
the second circulation loop is an auxiliary heating circulation loop;
the air side evaporator (8) is arranged outdoors, and the split cascade type CO is arranged outdoors2The rest part of the air source heat pump unit is arranged indoors.
2. The split cascade CO of claim 12The air source heat pump unit is characterized in that the evaporative condenser (3) comprises a first inlet, a first outlet, a second inlet and a second outlet; a first inlet of the evaporative condenser (3) is connected with an outlet of the gas cooler (2), and a first outlet of the evaporative condenser (3) is connected with an inlet of the first expansion valve (4); and a second inlet of the evaporative condenser (3) is connected with an outlet of the second expansion valve (12), and a second outlet of the evaporative condenser (3) is connected with a gas return end of the second compressor (10).
3. The split cascade CO of claim 22Air source heat pump unit, itCharacterized in that the economizer (5) comprises a liquid outlet and a gas outlet; and a liquid outlet of the economizer (5) is connected with an inlet of the refrigerant pump (6), and a gas outlet of the economizer (5) is connected with an outlet of the air side evaporator (8) and then connected with an inlet of the suction electromagnetic valve (9).
4. The split cascade CO of claim 12The air source heat pump unit is characterized in that the second circulation loop is filled with R134a refrigerant to form an R134a heating circulation loop.
5. The split cascade CO of claim 12The air source heat pump unit is characterized in that the gas cooler (2), the evaporative condenser (3) and the condenser (11) all adopt plate heat exchangers.
6. The split cascade CO of claim 12The air source heat pump unit is characterized in that the split cascade type CO2The air source heat pump unit also comprises a control system, wherein the control system is used for controlling the CO according to the temperature of the environment2The operation of the heating circulation loop, the defrosting circulation loop and the auxiliary heating circulation loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010150223.1A CN111174456A (en) | 2020-03-06 | 2020-03-06 | Split overlapping type CO2Air source heat pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010150223.1A CN111174456A (en) | 2020-03-06 | 2020-03-06 | Split overlapping type CO2Air source heat pump unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111174456A true CN111174456A (en) | 2020-05-19 |
Family
ID=70656866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010150223.1A Pending CN111174456A (en) | 2020-03-06 | 2020-03-06 | Split overlapping type CO2Air source heat pump unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111174456A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947222A (en) * | 2020-07-26 | 2020-11-17 | 万江新能源集团有限公司 | Air source double-compressor device |
| CN114754430A (en) * | 2022-04-12 | 2022-07-15 | 新科环保科技有限公司 | Air-conditioning heat pump system for preparing high-temperature hot water at low ambient temperature |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949409A (en) * | 2015-07-13 | 2015-09-30 | 金鑫 | System and method for flexibly defrosting air-source heat pump without starting compressor |
| CN105042672A (en) * | 2015-09-01 | 2015-11-11 | 中国铁道科学研究院 | Air source CO2 heat pump system suitable for connecting heating radiators |
| CN205536153U (en) * | 2016-01-29 | 2016-08-31 | 广东美的制冷设备有限公司 | Air conditioning system and refrigerant circulation system |
| KR101811957B1 (en) * | 2016-11-09 | 2017-12-22 | 한국해양대학교 산학협력단 | Cascade Heat Pump with Two Stage Expansion Structure using CO2 Refrigerant and Method for Circulating thereof |
| CN108458512A (en) * | 2018-03-13 | 2018-08-28 | 中铁工程设计咨询集团有限公司 | A kind of carbon dioxide air source heat pump system |
| CN211601183U (en) * | 2020-03-06 | 2020-09-29 | 吉风环境科技(江苏)有限公司 | Split overlapping type CO2Air source heat pump unit |
| CN211601195U (en) * | 2020-03-06 | 2020-09-29 | 吉风环境科技(江苏)有限公司 | Cascade CO2Air source heat pump unit |
-
2020
- 2020-03-06 CN CN202010150223.1A patent/CN111174456A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949409A (en) * | 2015-07-13 | 2015-09-30 | 金鑫 | System and method for flexibly defrosting air-source heat pump without starting compressor |
| CN105042672A (en) * | 2015-09-01 | 2015-11-11 | 中国铁道科学研究院 | Air source CO2 heat pump system suitable for connecting heating radiators |
| CN205536153U (en) * | 2016-01-29 | 2016-08-31 | 广东美的制冷设备有限公司 | Air conditioning system and refrigerant circulation system |
| KR101811957B1 (en) * | 2016-11-09 | 2017-12-22 | 한국해양대학교 산학협력단 | Cascade Heat Pump with Two Stage Expansion Structure using CO2 Refrigerant and Method for Circulating thereof |
| CN108458512A (en) * | 2018-03-13 | 2018-08-28 | 中铁工程设计咨询集团有限公司 | A kind of carbon dioxide air source heat pump system |
| CN211601183U (en) * | 2020-03-06 | 2020-09-29 | 吉风环境科技(江苏)有限公司 | Split overlapping type CO2Air source heat pump unit |
| CN211601195U (en) * | 2020-03-06 | 2020-09-29 | 吉风环境科技(江苏)有限公司 | Cascade CO2Air source heat pump unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947222A (en) * | 2020-07-26 | 2020-11-17 | 万江新能源集团有限公司 | Air source double-compressor device |
| CN114754430A (en) * | 2022-04-12 | 2022-07-15 | 新科环保科技有限公司 | Air-conditioning heat pump system for preparing high-temperature hot water at low ambient temperature |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106016771A (en) | Solar air source heat pump triple co-generation system and control method thereof | |
| WO2020073481A1 (en) | Air conditioning system | |
| CN102997499A (en) | Air source heat pump device capable of producing cold water and hot mater at same time | |
| CN105444453A (en) | Double-temperature refrigerating and heating system | |
| CN202757346U (en) | Central air-conditioning and hot water all-in-one machine | |
| CN111174456A (en) | Split overlapping type CO2Air source heat pump unit | |
| CN211601195U (en) | Cascade CO2Air source heat pump unit | |
| CN211601182U (en) | Split type CO2Air source heat pump unit | |
| CN108592453B (en) | Gas heat pump composite system of coupling evaporative cooling type heat exchanger under low-temperature working condition | |
| CN101936614B (en) | Liquid-supplying and cold and hot water-circulating machine set of evaporative condensate pump | |
| CN211601183U (en) | Split overlapping type CO2Air source heat pump unit | |
| CN101078575A (en) | Highly effective heat pump air conditioner and hot water device suitable for wide temperature environment | |
| CN111156726B (en) | Air source heat pump system based on soil cross-season heat accumulation defrosting and solar intermittent utilization and application method thereof | |
| CN2769743Y (en) | Multifunction cold-hot water air conditioner | |
| CN205373127U (en) | Double-temperature refrigerating and heating system | |
| CN201322469Y (en) | Tri-coupled air-source heat pump air conditioner | |
| CN218120237U (en) | Heat exchange system | |
| CN201074920Y (en) | Heat pump type air conditioner and water heater being suitable for broad temperature surroundings running in high efficiency | |
| CN216048111U (en) | Double-source integrated air source heat pump unit with total heat recovery | |
| CN111197875A (en) | Split type CO2Air source heat pump unit | |
| CN211601196U (en) | CO (carbon monoxide)2Air source heat pump unit | |
| CN101078574A (en) | Highly effective heating and refrigerating air source heat pump air conditioner suitable for wide temperature environment | |
| CN105823257A (en) | Efficient ice source heat pump unit | |
| CN102425825A (en) | Two-pipe ultra-high ultra-low temperature heat pump hot water triple-purpose central air conditioning system | |
| CN108332323B (en) | Flat tube plate fin type heat source tower heat pump air conditioning system and working method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |