CN211601196U - CO (carbon monoxide)2Air source heat pump unit - Google Patents
CO (carbon monoxide)2Air source heat pump unit Download PDFInfo
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- CN211601196U CN211601196U CN202020264705.5U CN202020264705U CN211601196U CN 211601196 U CN211601196 U CN 211601196U CN 202020264705 U CN202020264705 U CN 202020264705U CN 211601196 U CN211601196 U CN 211601196U
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- economizer
- circulation loop
- defrosting
- heating device
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Abstract
The utility model discloses a CO2The air source heat pump unit comprises a circulating loop formed by sequentially connecting a compressor, a gas cooler, an expansion valve, an economizer, a heating device and an air side evaporator; the circulation loop is filled with CO2A refrigerant; the economizer includes a liquid outlet and a gas outlet; the liquid outlet of the economizer and the economizerThe inlet of the heating device is connected, and the gas outlet of the economizer is connected with the outlet of the air side evaporator and then connected with the gas return end of the compressor; the circulation loop comprises a heating circulation loop and a defrosting circulation loop; switching of the heating cycle circuit and the defrosting cycle circuit is controlled by opening and closing of the expansion valve. The utility model has the automatic defrosting function, the defrosting speed is high, the defrosting loss is less, and the efficient defrosting is effectively realized; meanwhile, a heat source in the heating device adopts return water in the gas cooler, so that the defrosting energy consumption is effectively reduced.
Description
Technical Field
The utility model relates to a heat pump technology field especially relates to aCO (carbon monoxide)2An air source heat pump unit.
Background
Energy conservation and environmental protection are the key points for realizing sustainable development. In recent years, natural working medium CO2The carbon dioxide is regarded as one of the most potential natural working media in the working medium substitution of a heat pump system, and the critical temperature is 31 ℃, because the carbon dioxide is more and more valued by the heat pump industry due to 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. By virtue of the unique transcritical performance of the carbon dioxide heat pump system, the carbon dioxide heat pump system can realize hot water heating of more than 60 ℃ and can achieve higher energy efficiency ratio even in a low-temperature air environment, such as CO produced by Taiwan high-power company2The air source heat pump water heater can produce hot water with the temperature of over 60 ℃, and the carbon dioxide heat pump water heater produced by DENSO company in Japan can heat domestic hot water from 30 ℃ to 90 ℃ at one time.
Currently with CO2Compared with an air source heat pump of a conventional refrigerant, the air source heat pump of the refrigerant has good environmental protection property of the refrigerant and higher energy efficiency ratio of the system, and is gradually applied to domestic hot water heating and heating systems in severe cold regions. But because of CO2The air source heat pump unit is mainly installed outdoors, the air side evaporator is difficult to defrost in a low-temperature environment and high in energy consumption, an effective defrosting means is lacked at present, and CO is caused2The air source heat pump unit is difficult to popularize.
SUMMERY OF THE UTILITY MODEL
The purpose of the utility model is to provide a CO2Air source heat pump set to solve the problems existing in the prior art, can defrost fast and effectively, and reduce the defrosting energy consumption.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a CO2The air source heat pump unit comprises a compressor, a gas cooler, an expansion valve, an economizer, a heating device and an air side evaporator; the compressor, the gas cooler, the expansion valve, the economizer, the heating device and the air side evaporator are sequentially connected to form a circulating loop; the circulation loop is filled withCO injection2A refrigerant;
the economizer includes a liquid outlet and a gas outlet; a liquid outlet of the economizer is connected with an inlet of the heating device, and a gas outlet of the economizer is connected with an outlet of the air side evaporator and then connected with a gas return end of the compressor;
the circulation loop comprises a heating circulation loop and a defrosting circulation loop; switching of the heating cycle circuit and the defrosting cycle circuit is controlled by opening and closing of the expansion valve.
Preferably, the economizer, the heating device and the air side evaporator are connected in sequence to form a defrosting circulation loop; the defrosting circulation loop adopts a gravity circulation mode, and the economizer, the heating device and the air side evaporator are connected by adopting gravity heat pipes.
Preferably, the CO is2The refrigerant heats the water in the gas cooler.
Preferably, the heat source in the heating device adopts electric heating or adopts return water in the gas cooler.
Preferably, the expansion valve is an electronic expansion valve, and can adjust the evaporation pressure and the suction superheat degree to meet different working condition requirements.
Preferably, when the heating circulation loop is operated, the heating device is closed; when the defrosting circulation loop operates, the heating device is opened.
Preferably, when the defrosting circulation circuit operates, the expansion valve is closed, and when the heating circulation circuit operates, the expansion valve is opened.
The utility model discloses a following technological effect:
(1) the utility model discloses have automatic defrosting function, close the expansion valve, adopt external heating device to CO2The refrigerant is heated, and the defrosting and CO in the evaporator can be realized2The refrigerant circulates through the gravity heat pipe, the circulation speed is high, the defrosting loss is low, and efficient defrosting is effectively realized; meanwhile, a heat source in the heating device adopts return water in the gas cooler, so that the temperature of the gas is effectively reducedThe defrosting energy consumption is low;
(2) the utility model adopts CO2As a pure natural refrigerant, the ozone layer destruction potential value is 0, the global warming potential value is 1, and the refrigerant has excellent thermodynamic property and environmental protection property;
(3) the utility model has good low temperature adaptability, CO2The high-enthalpy-value heat pump unit has good thermodynamic property, high enthalpy value, small viscosity and good heat transfer characteristic in a low-temperature environment, can be started to operate even at a low environmental temperature, can meet the heat supply requirement of small flow and large temperature difference, and also has good heating efficiency at the environmental temperature of minus 30 ℃.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required 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 for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 shows the CO of the present invention2The overall structure schematic diagram of the air source heat pump unit;
FIG. 2 shows the CO of the present invention2The structure schematic diagram of the heating circulation loop of the air source heat pump unit;
FIG. 3 shows the CO of the present invention2The defrosting circulation loop of the air source heat pump unit is structurally schematic;
wherein, 1, a compressor; 2. a gas cooler; 3. an expansion valve; 4. an economizer; 5. a heating device; 6. an air side evaporator.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Referring to FIGS. 1-3, the present embodiment provides a CO2The air source heat pump unit comprises a compressor 1, a gas cooler 2, an expansion valve 3, an economizer 4, a heating device 5 and an air side evaporator 6; the compressor 1, the gas cooler 2, the expansion valve 3, the economizer 4, the heating device 5 and the air side evaporator 6 are sequentially connected to form a circulation loop; the circulation loop is filled with CO2A refrigerant.
The economizer 4 comprises a liquid outlet and a gas outlet, the liquid outlet of the economizer 4 is connected with the inlet of the heating device 5, and the gas outlet of the economizer 4 is connected with the outlet of the air side evaporator 6 and then connected with the gas return end of the compressor 1.
The circulation loop comprises a heating circulation loop and a defrosting circulation loop; switching of the heating cycle circuit and the defrosting cycle circuit is controlled by opening and closing of the expansion valve 3.
The heating device 5 is used for heating CO2The refrigerant is heated by heated CO2The refrigerant provides a heat source for defrosting the air side evaporator 6; the heating circuit is switched off during operation of the heating circuit 5, and the defrosting circuit is switched on during operation of the defrosting circuit 5.
The economizer 4, the heating device 5 and the air side evaporator 6 are sequentially connected to form a defrosting circulation loop; the defrosting circulation loop adopts a gravity circulation mode, and the economizer 4, the heating device 5 and the air side evaporator 6 are connected by adopting gravity heat pipes.
The specific connection relationship is as follows:
the exhaust end of the compressor 1 is connected with the inlet of the gas cooler 2, the outlet of the gas cooler 2 is connected with the inlet of the expansion valve 3, the outlet of the expansion valve 3 is connected with the inlet of the economizer 4, the liquid outlet of the economizer 4 is connected with the inlet of the heating device 5, the outlet of the heating device 5 is connected with the inlet of the air side evaporator 6, and the outlet of the air side evaporator 6 and the gas outlet of the economizer 4 are connected and then connected with the gas return end of the compressor 1.
Further optimization scheme, the CO2The refrigerant heats the water in the gas cooler 2 to realize the CO2And (4) cooling the refrigerant.
In a further preferred embodiment, the heating device 5 is a hot water heating device, such as hot water-CO2Plate-exchange type heat exchanger and hot water-CO2A shell and tube heat exchanger; the heating device 5 can also adopt an electric heating device; the heating device 5 can also adopt a water source heat pump heating device;
in a further optimized scheme, a heat source in the heating device 5 adopts electric heating or adopts return water in the gas cooler 2.
Further, according to the optimized scheme, the expansion valve 3 is an electronic expansion valve, so that the evaporation pressure and the suction superheat degree can be adjusted, and different working condition requirements can be met.
The CO is2The specific working principle of the air source heat pump unit is as follows:
the expansion valve 3 is opened, the heating device 5 is closed, and the heating circulation loop works, as shown in fig. 2, the specific principle is as follows:
the compressor 1 pumps high-temperature and high-pressure CO2The refrigerant is discharged and enters the gas cooler 2; high temperature and high pressure CO2The refrigerant is cooled by the gas cooler 2 and then enters the expansion valve 3; reduced pressure by throttling with expansion valve 3 to form CO2A gas-liquid mixture; CO 22The gas-liquid mixture is separated into CO by an economizer 42Saturated liquid and CO2A saturated gas; CO 22Saturated liquid flows out of the liquid outlet of the economizer 4, CO2Saturated gas flows out from a gas outlet of the economizer 4;
CO flowing from the economizer 4 liquid outlet2The saturated liquid flows through the heating device 5 and enters the air side evaporator 6, CO2Side evaporation of saturated liquid from airThe generator 6 absorbs heat and then becomes CO2A gas;
CO flowing out of the gas outlet of the economizer 42Saturated gas, CO flowing from the air-side evaporator 62The gas is mixed and then enters the compressor 1 to complete a heating cycle.
The expansion valve 3 is closed, the heating device 5 is opened, and the defrosting circulation loop works, as shown in fig. 3, the specific principle is as follows:
CO from the economizer 42The saturated liquid flows into the heating device 5, CO2After being heated by a heating device 5, the saturated liquid enters an air side evaporator 6 and releases heat, and an air side frost layer is heated and removed; CO flowing from the air side evaporator 62The refrigerant flows into the economizer 4 through a gas outlet of the economizer 4, completing one defrost cycle.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.
Claims (7)
1. CO (carbon monoxide)2The air source heat pump unit is characterized by comprising a compressor (1), a gas cooler (2), an expansion valve (3), an economizer (4), a heating device (5) and an air side evaporator (6); the compressor (1), the gas cooler (2), the expansion valve (3), the economizer (4) and the heating device(5) The air side evaporators (6) are connected in sequence to form a circulation loop; the circulation loop is filled with CO2A refrigerant;
the economizer (4) comprises a liquid outlet and a gas outlet; a liquid outlet of the economizer (4) is connected with an inlet of the heating device (5), and a gas outlet of the economizer (4) is connected with an outlet of the air side evaporator (6) and then connected with a gas return end of the compressor (1);
the circulation loop comprises a heating circulation loop and a defrosting circulation loop; switching of the heating cycle circuit and the defrosting cycle circuit is controlled by opening and closing of the expansion valve (3).
2. CO according to claim 12The air source heat pump unit is characterized in that the economizer (4), the heating device (5) and the air side evaporator (6) are sequentially connected to form a defrosting circulation loop; the defrosting circulation loop adopts a gravity circulation mode, and the economizer (4), the heating device (5) and the air side evaporator (6) are connected by adopting gravity heat pipes.
3. CO according to claim 12An air source heat pump unit, wherein the CO2The refrigerant heats the water in the gas cooler (2).
4. CO according to claim 32The air source heat pump unit is characterized in that a heat source in the heating device (5) adopts electric heating or adopts return water in the gas cooler (2).
5. CO according to claim 12The air source heat pump unit is characterized in that the expansion valve (3) adopts an electronic expansion valve, can adjust the evaporation pressure and the suction superheat degree and is used for meeting different working condition requirements.
6. CO according to claim 12Air source heat pump unit, its characterized in that, heating circulation circuitIn operation, the heating device (5) is switched off; when the defrosting circulation loop is operated, the heating device (5) is opened.
7. CO according to claim 12The air source heat pump unit is characterized in that when the defrosting circulation loop operates, the expansion valve (3) is closed, and when the heating circulation loop operates, the expansion valve (3) is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020264705.5U CN211601196U (en) | 2020-03-06 | 2020-03-06 | CO (carbon monoxide)2Air source heat pump unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020264705.5U CN211601196U (en) | 2020-03-06 | 2020-03-06 | CO (carbon monoxide)2Air source heat pump unit |
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| CN211601196U true CN211601196U (en) | 2020-09-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111197875A (en) * | 2020-03-06 | 2020-05-26 | 吉风环境科技(江苏)有限公司 | Split type CO2Air source heat pump unit |
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2020
- 2020-03-06 CN CN202020264705.5U patent/CN211601196U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111197875A (en) * | 2020-03-06 | 2020-05-26 | 吉风环境科技(江苏)有限公司 | Split type CO2Air source heat pump unit |
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