CN112440658A - Heat pump air conditioning system and vehicle - Google Patents
Heat pump air conditioning system and vehicle Download PDFInfo
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- CN112440658A CN112440658A CN201910818106.5A CN201910818106A CN112440658A CN 112440658 A CN112440658 A CN 112440658A CN 201910818106 A CN201910818106 A CN 201910818106A CN 112440658 A CN112440658 A CN 112440658A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00007—Combined heating, ventilating, or cooling devices
- B60H1/00021—Air flow details of HVAC devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00007—Combined heating, ventilating, or cooling devices
- B60H1/00021—Air flow details of HVAC devices
- B60H2001/00114—Heating or cooling details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H2001/00307—Component temperature regulation using a liquid flow
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
Abstract
The invention provides a heat pump air conditioning system and a vehicle, which relate to the technical field of vehicles and specifically comprise the following steps: a heating water loop consisting of a radiator and a heat exchanger; the compressor, the water-cooled condenser and the heat exchanger are sequentially connected through a refrigerant pipeline to form a refrigerant loop; the hot air module and the water-cooled condenser form a hot water loop; when heating the vehicle, the compressor is used for circulating the refrigerant in the refrigerant pipeline between the water-cooled condenser and the heat exchanger, and the refrigerant gives off heat in the water-cooled condenser and absorbs heat in the heat exchanger; and the heat emitted by the refrigerant in the water-cooled condenser is transferred to the warm air module through water, and is supplied to the vehicle for heating through the warm air module. The heat pump air-conditioning system provided by the embodiment of the invention can effectively avoid the problem that the surface of the outdoor heat exchanger is easy to frost, can utilize the environmental heat more greatly, and is more energy-saving and environment-friendly.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a heat pump air conditioning system and a vehicle.
Background
With the development of vehicle technology, the energy conservation and emission reduction of vehicles are receiving more and more attention. At present, heat pump air-conditioning heating is more electricity-saving, rapid and safe than heating by using an electric heater, so that the heat pump air-conditioning heating is favored by various large vehicle enterprises.
In the prior art, a heat pump air conditioning system is evolved from a refrigeration air conditioning system. Currently, heat pump air conditioning systems on vehicles typically include: the refrigerant loop is formed by connecting a compressor, an indoor condenser and an outdoor heat exchanger in sequence. When the heat pump air-conditioning system heats, the high-temperature and high-pressure refrigerant discharged by the compressor releases heat through the indoor condenser, evaporates and absorbs heat through the outdoor heat exchanger, and finally forms low-temperature and low-pressure refrigerant which flows back to the compressor.
However, the heat pump air conditioning system on the vehicle usually heats under winter working conditions (or low-temperature working conditions), and when a refrigerant in the outdoor heat exchanger evaporates and absorbs heat, water vapor in the air is easily condensed into frost on the surfaces of the heat exchanger pipeline and the fins, that is, the outdoor heat exchanger has a frosting phenomenon, the frosting can seriously affect the heat exchange capability of the outdoor heat exchanger, and finally the heating of the heat pump air conditioning system is affected, so that the energy consumption of the vehicle is increased.
Disclosure of Invention
In view of the above, the present invention is directed to a heat pump air conditioning system to solve the problem in the prior art that the outdoor heat exchanger is prone to frost formation, which leads to increase of vehicle energy consumption.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a heat pump air conditioning system is applied to a vehicle and comprises: a refrigerant circuit, a heating water circuit and a heating water circuit; wherein
The heating water circuit includes: the water outlet of the radiator is connected with the water inlet of the heat exchanger, and the water inlet of the radiator is connected with the water outlet of the heat exchanger; the radiator is used for absorbing the heat of air and transferring the heat to the heat exchanger through water;
the refrigerant circuit includes: the compressor, the water-cooled condenser and the heat exchanger are sequentially connected through a refrigerant pipeline; when heating the vehicle, the compressor is used for circulating the refrigerant in the refrigerant pipeline between the water-cooled condenser and the heat exchanger, and the refrigerant gives off heat in the water-cooled condenser and absorbs heat in the heat exchanger;
the heating water circuit includes: the warm braw module, the water inlet of warm braw module with water cooled condenser's delivery port passes through the pipeline and links to each other, the delivery port of warm braw module with water cooled condenser's water inlet passes through water pipeline and links to each other, the refrigerant is in heat that water cooled condenser emitted passes through water transfer extremely the warm braw module, and pass through the warm braw module is provided the vehicle heating.
Further, the heating water circuit further includes: a battery heat dissipation module;
the water outlet of the battery heat dissipation module is connected with the water inlet of the heat exchanger, and the water inlet of the battery heat dissipation module is connected with the water outlet of the heat exchanger; the battery heat dissipation module is used for transferring heat dissipated by the battery on the vehicle to the heat exchanger.
Further, the heating water circuit further includes: a motor heat dissipation module;
the water outlet of the motor heat dissipation module is connected with the water inlet of the heat exchanger, and the water inlet of the motor heat dissipation module is connected with the water outlet of the heat exchanger; the motor heat dissipation module is used for transferring heat dissipated by the motor unit on the vehicle to the heat exchanger.
Further, the heating water circuit further includes: the electric heater, the electric heater set up in the water-cooled condenser delivery port with between the warm braw module, the electric heater is used for giving the water that the water-cooled condenser flows heats, in order to assist the warm braw module gives the vehicle heating.
Further, the refrigerant circuit further includes: and the first expansion valve is arranged between the water-cooled condenser and the heat exchanger and is used for controlling the flow of the refrigerant flowing to the heat exchanger.
Further, the refrigerant circuit further includes: an evaporator and an outdoor condenser;
the compressor, the outdoor condenser and the evaporator form a refrigeration loop through refrigerant pipelines;
the compressor is configured to circulate refrigerant in the refrigerant line between the outdoor condenser and the evaporator when cooling the vehicle, the refrigerant releasing heat in the outdoor condenser and absorbing heat in the evaporator.
Further, the refrigerant circuit further includes: and a second expansion valve disposed between the outdoor condenser and the evaporator, the second expansion valve being used to control a flow rate of the refrigerant flowing to the evaporator.
Further, the heating water circuit further includes: the radiator fan is arranged opposite to the radiator and used for improving the heat absorbed by the radiator.
Further, the system further comprises: the temperature sensor is arranged in a passenger compartment of the vehicle, and the compressor adjusts the rotating speed according to the temperature of the passenger compartment acquired by the temperature sensor.
Compared with the prior art, the heat pump air conditioning system has the following advantages:
in the embodiment of the invention, the water outlet of the radiator is connected with the water inlet of the heat exchanger, the water inlet of the radiator is connected with the water outlet of the heat exchanger, the compressor, the water-cooled condenser and the heat exchanger are sequentially connected through a refrigerant pipeline to form a refrigerant loop, the water inlet of the warm air module is connected with the water outlet of the water-cooled condenser through a water pipeline, and the water outlet of the warm air module is connected with the water inlet of the water-cooled condenser through a water pipeline, so that heat absorbed by the radiator can be transferred to the refrigerant through the heat exchanger, the refrigerant can transfer heat to the warm air module through the water-cooled condenser, and finally, a vehicle is heated through the warm air module. In the embodiment of the invention, the radiator is used for replacing an outdoor heat exchanger in the prior art to absorb heat, and the heat conducting medium running in the radiator is water (or cooling liquid), so that the specific volume of the water is larger, more environmental heat can be absorbed, and the integral temperature of the radiator is more uniform and the frosting phenomenon is not easy to occur even when the radiator absorbs heat under winter working conditions or low-temperature working conditions.
Another object of the present invention is to provide a vehicle, which solves the problem of increased energy consumption of the vehicle caused by frosting easily on the outdoor heat exchanger of the heat pump air conditioning system in the existing vehicle.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle, the vehicle comprising: the heat pump air conditioning system.
The vehicle and the heat pump air conditioning system have the same advantages compared with the prior art, and the detailed description is omitted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a heat pump air conditioning system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a heating principle of the heat pump air conditioning system of FIG. 1 according to the embodiment of the present invention;
fig. 3 is a schematic view of a refrigeration principle of the heat pump air conditioning system shown in fig. 1 according to the embodiment of the present invention.
Description of reference numerals:
1-refrigerant circuit, 2-heating water circuit, 3-heating water circuit, 10-radiator, 20-heat exchanger, 30-compressor, 40-water-cooled condenser, 50-warm air module, 60-battery radiating module, 70-motor radiating module, 80-radiator fan, 90-electric heater, 100-first expansion valve, 101-evaporator, 102-outdoor condenser, 103-second expansion valve.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The embodiment of the invention provides a heat pump air conditioning system, which specifically comprises: a refrigerant circuit, a heating water circuit and a heating water circuit; wherein the heating water circuit includes: the water outlet of the radiator is connected with the water inlet of the heat exchanger, and the water inlet of the radiator is connected with the water outlet of the heat exchanger; the radiator is used for absorbing the heat of air and transferring the heat to the heat exchanger through water; the refrigerant loop comprises a compressor, a water-cooled condenser and a heat exchanger which are sequentially connected through a refrigerant pipeline; the compressor is operable to circulate refrigerant in the refrigerant line between the water cooled condenser and the heat exchanger when heating the vehicle, the refrigerant rejecting heat at the water cooled condenser and absorbing heat at and in the heat exchanger; the heating water circuit includes: the warm braw module, the water inlet of warm braw module with water cooled condenser's delivery port passes through water pipeline and links to each other, the delivery port of warm braw module with water cooled condenser's water inlet passes through water pipeline and links to each other, the refrigerant is in heat that water cooled condenser emitted passes through water transfer extremely the warm braw module, and pass through the warm braw module is provided the vehicle heating.
In the embodiment of the present invention, the refrigerant may be any one or a combination of more than one of R-410A, R22, R134A, R407C, and the like, which is not particularly limited in the embodiment of the present invention.
The heating water loop and the water medium for the operation of the heating water loop in the embodiment of the invention can be cooling liquid prepared by mixing water, antifreeze and additives. For example, the coolant of glycol type (mixture of water, glycol, and additives) in the embodiment of the present invention is not limited to the specific additives and antifreeze additives for the aqueous medium.
In the embodiment of the invention, the water outlet of the radiator is connected with the water inlet of the heat exchanger, the water inlet of the radiator is connected with the water outlet of the heat exchanger, the compressor, the water-cooled condenser and the heat exchanger are sequentially connected through a refrigerant pipeline to form a refrigerant loop, the water inlet of the warm air module is connected with the water outlet of the water-cooled condenser through a water pipeline, and the water outlet of the warm air module is connected with the water inlet of the water-cooled condenser through a water pipeline, so that heat absorbed by the radiator can be transferred to the refrigerant through the heat exchanger, the refrigerant can transfer heat to the warm air module through the water-cooled condenser, and finally, a vehicle is heated through the warm air module. According to the heat pump air conditioning system, the radiator replaces an outdoor heat exchanger in the prior art to absorb heat, and the heat conducting medium running in the radiator is water, so that even when the radiator absorbs heat under winter working conditions or low-temperature working conditions, the overall temperature of the radiator is uniform, and the frosting phenomenon is not easy to occur.
Referring to fig. 1, a schematic diagram of a heat pump air conditioning system in an embodiment of the present invention is shown. As shown in the figure, the heat pump air conditioning system may specifically include: a refrigerant circuit 1, a heating water circuit 2, and a heating water circuit 3; wherein, heating water return circuit 1 includes: the water outlet of the radiator 10 is connected with the water inlet of the heat exchanger 20, and the water inlet of the radiator 10 is connected with the water outlet of the heat exchanger 20; the radiator 10 is used for absorbing heat of air and transferring the heat to the heat exchanger 20 through water; the refrigerant circuit 2 includes: a compressor 30, a water-cooled condenser 40 and a heat exchanger 20 connected in sequence by refrigerant pipes; when heating the vehicle, the compressor 30 is used to circulate the refrigerant in the refrigerant line between the water-cooled condenser 40 and the heat exchanger 20, the refrigerant giving off heat in the water-cooled condenser 40 and absorbing heat in the heat exchanger 20; the heating water circuit 3 includes: the water inlet of the warm air module 50 is connected with the water outlet of the water-cooled condenser 40 through a water pipeline, the water outlet of the warm air module 50 is connected with the water inlet of the water-cooled condenser 40 through a water pipeline, and heat emitted by the refrigerant in the water-cooled condenser 40 is transferred to the warm air module 50 through water and is supplied to the vehicle for heating through the warm air module 50.
In the embodiment of the present invention, because the water outlet of the radiator 10 is connected to the water inlet of the heat exchanger 20, the water inlet of the radiator 10 is connected to the water outlet of the heat exchanger 20, the compressor 30, the water-cooled condenser 40 and the heat exchanger 20 are sequentially connected by a refrigerant pipeline to form a refrigerant loop, the water inlet of the warm air module 50 is connected to the water outlet of the water-cooled condenser 40 by a water pipeline, and the water outlet of the warm air module 50 is connected to the water inlet of the water-cooled condenser 40 by a water pipeline, heat absorbed by the radiator 10 from air can be exchanged in the heat exchanger 20 and transferred to the refrigerant, and the refrigerant can transfer heat to the warm air module 50 through the water-cooled condenser 40, and finally heat is supplied.
In the embodiment of the invention, the radiator is used for replacing an outdoor heat exchanger in the prior art to absorb heat, and because the heat-conducting medium running in the radiator is water (or cooling liquid), the integral temperature of the radiator is relatively uniform and frosting phenomenon is not easy to occur even when the radiator absorbs heat under winter working conditions or low-temperature working conditions, so that the heat pump air-conditioning system in the embodiment of the invention not only can effectively avoid the problem that the surface of the outdoor heat exchanger is easy to froste, but also can utilize environmental heat to a greater extent, and is more energy-saving and environment-friendly.
Referring to fig. 2, a schematic heating principle of the heat pump air conditioning system shown in fig. 1 according to the embodiment of the present invention is shown. As shown, when heating a vehicle: in the heating water loop 1, a radiator 10 absorbs the heat of air and transfers the heat to a heat exchanger 20 through water to emit heat; in the refrigerant circuit 2, the compressor 30 circulates the refrigerant in the refrigerant line between the water-cooled condenser 40 and the heat exchanger 20, the refrigerant gives off heat in the water-cooled condenser 40, and absorbs heat in the heat exchanger 20; in the heating water circuit 3, the heat released by the refrigerant in the water-cooled condenser 40 is transferred to the warm air module 50 through water, and is provided to the vehicle for heating through the warm air module 50, and thus the heating for the vehicle is completed.
In the embodiment of the invention, the heat in the air is absorbed by the radiator 10, and because the heat-conducting medium running in the radiator 10 is water (or cooling liquid), even if the radiator 10 absorbs heat in working under winter working conditions or low-temperature working conditions, the whole temperature of the radiator is relatively uniform, and the surface frosting phenomenon is not easy to occur, so that the heat pump air-conditioning system of the embodiment of the invention not only can effectively avoid the problem that the surface of the outdoor heat exchanger is easy to froste, but also can utilize the environmental heat to a greater extent, and is more energy-saving and environment-friendly. And, through the warm braw module 50 in the heating water return circuit 3 for vehicle heating, the hydrologic cycle heating makes the heat source distribution in the vehicle more even, has also effectively improved the travelling comfort of vehicle.
Optionally, the heating water circuit 1 may further include: a battery heat dissipation module 60; the water outlet of the battery heat dissipation module 60 is connected with the water inlet of the heat exchanger 20, and the water inlet of the battery heat dissipation module 60 is connected with the water outlet of the heat exchanger 20; the battery heat dissipation module 60 is used to transfer heat dissipated from the battery on the vehicle to the heat exchanger 20.
In practical application, because the battery module in the vehicle can give off a large amount of heats, in order to avoid the waste of the heat that the battery module gives off, improve energy utilization, can also set up battery heat dissipation module 60 in heating water return circuit 1, utilize battery heat dissipation module 60 to get up the heat recovery that devices such as battery in the vehicle gave off to transmit to heat exchanger 20 through water, and then provide the vehicle heating.
Optionally, the heating water circuit 1 may further include: a motor heat dissipation module 70; the water outlet of the motor heat dissipation module 70 is connected with the water inlet of the heat exchanger 20, and the water inlet of the motor heat dissipation module 70 is connected with the water outlet of the heat exchanger 20; the motor heat dissipation module 70 is configured to transfer heat dissipated by the motor unit on the vehicle to the heat exchanger 20.
In practical application, people pay more attention to the heat emitted by high-temperature components such as a battery and the like, and recycle the heat, but parts such as a motor and the like in a vehicle can also dissipate heat in the driving process, so that in order to avoid heat waste and improve waste heat recovery, a motor heat dissipation module 70 can be arranged in the heating water loop 1, the heat emitted by the parts such as the motor and the like in the vehicle is recycled by using the motor heat dissipation module 70, and is transferred to the heat exchanger 20 through water, and further, the vehicle is supplied with more energy-saving and environment-friendly heating.
In the embodiment of the present invention, the motor heat dissipation module 70 may recover heat dissipated by a low temperature device such as a motor, a Power Distribution Unit (PDU), and an electronic circuit board on the vehicle. Therefore, the heat dissipated by the parts with the working temperature lower than 70 ℃ on the vehicle is recycled, and the energy-saving and environment-friendly effects are achieved.
In practical applications, the radiator 10, the battery cooling module 60 and the motor cooling module 70 in the heating water circuit may be configured to operate simultaneously to heat the vehicle, so as to avoid the problem of frosting on the surface of the outdoor heat exchanger in the prior art and improve the utilization rate of heat. Or, the heat of the battery heat dissipation module 60 can be preferentially recovered, and when the battery heat dissipation module 60 is not enough to provide effective heat for vehicle heating, the motor heat dissipation module 70 and the radiator 10 are restarted to provide heat, so that the heat of the battery heat dissipation module 60 with more heat dissipation modules is preferentially recovered, the heat waste is effectively avoided, and the waste heat recovery rate is improved. Of course, a person skilled in the art may set the operation modes of the heat sink 10, the battery heat dissipation module 60, and the motor heat dissipation module 70 in the heating water circuit according to practical situations, and the embodiment of the present invention is not limited in this respect.
Optionally, the heating water circuit 1 may further include: the radiator fan 80 is disposed opposite to the radiator 10, and the radiator fan 80 increases the amount of heat absorbed by the radiator 10.
In practical applications, the radiator fan 80 may be disposed at a position opposite to the radiator 10, and the air flow speed passing through the surface of the radiator 10 is accelerated by the radiator fan 80, so as to improve the heat absorption capability of the radiator 10.
Optionally, the heating water circuit 3 may further include: and the electric heater 90 is arranged between the water outlet of the water-cooled condenser 40 and the warm air module 50, and the electric heater 90 is used for heating the water flowing out of the water-cooled condenser 40 so as to assist the warm air module 50 in heating the vehicle.
In practical applications, the high temperature water from the water cooled condenser 40 is used to heat the vehicle through the heater module 50. The high-temperature water in the embodiment of the present invention is water having a temperature equal to or higher than that of the inflow water-cooled condenser 40. When the heat pump air-conditioning system is insufficient in heating capacity or fails, the electric heater 90 can be used for heating water flowing out of the water-cooling condenser 40 to assist the hot air module 50 in heating the vehicle, so that a backup is provided for heating the vehicle, heating failure of the vehicle can be avoided, and comfort of the vehicle is effectively improved.
Alternatively, a wind-side electric heater may be further provided on the warm air module 50 side so as to assist the warm air module 50 in heating the vehicle by heating air blown into the passenger compartment of the vehicle.
As shown in fig. 2, the refrigerant circuit 2 further includes: and a first expansion valve 100, the first expansion valve 100 being disposed between the water-cooled condenser 40 and the heat exchanger 20, the first expansion valve 100 controlling a flow rate of the refrigerant flowing to the heat exchanger 20.
In the embodiment of the present invention, when heating the vehicle, the compressor 30 discharges high-temperature and high-pressure refrigerant vapor, the refrigerant vapor passes through the water-cooled condenser 40 to release heat to form low-temperature and high-pressure refrigerant liquid, and the refrigerant liquid is throttled by the first expansion valve 100, so that the low-temperature and high-pressure refrigerant liquid is evaporated and absorbs heat in the heat exchanger 20 to form low-temperature and low-pressure refrigerant vapor, and the refrigerant vapor is finally sucked by the compressor 30, and the cycle is performed. In practical applications, the opening degree of the first expansion valve 100 is adjusted so that the refrigerant entering the heat exchanger 20 can be completely evaporated and vaporized, thereby preventing the liquid refrigerant from entering the compressor 30 and causing the compressor 30 to malfunction.
It can be understood by those skilled in the art that the high-temperature high-pressure refrigerant vapor, the low-temperature high-pressure refrigerant liquid, and the low-temperature low-pressure refrigerant vapor described in the embodiments of the present invention are all relative terms and are not limited by pressure values, and the high-temperature high-pressure refrigerant vapor, the low-temperature high-pressure refrigerant liquid, and the low-temperature low-pressure refrigerant vapor in the embodiments of the present invention all represent the state changes of the refrigerant in the components of the pipeline, and do not represent the existence forms of the refrigerant in the pipeline.
In practical applications, the first expansion valve 100 may be an electronic expansion valve or a thermal expansion valve. The temperature sensing part of the electronic expansion valve is a thermocouple or a thermal resistor, so that the change of the superheat degree can be accurately reflected at low temperature, and the electronic expansion valve can also achieve good flow regulation in a low-temperature environment, so that the heat pump air-conditioning system can also perform accurate heating regulation at low temperature. Certainly, the thermal expansion valve is lower in price and wider in application range, so that the heat pump air conditioning system also has the advantages of being low in price and wider in application range.
In the embodiment of the invention, the heat pump air conditioning system uses the radiator 10 to replace an outdoor heat exchanger in the prior art to absorb heat, so that the problem of poor heat exchange capability caused by easy frosting on the surface of the outdoor heat exchanger in the prior art is avoided, and the comfort of a vehicle is effectively improved. Furthermore, in the prior art, when heat is absorbed by the outdoor heat exchanger, an expansion valve (a thermostatic expansion valve or an electronic expansion valve) needs to be arranged on a refrigerant input pipeline at the front end of the outdoor heat exchanger, and the refrigerant flow is regulated by the expansion valve, so that the heat pump air-conditioning system of the embodiment of the invention absorbs heat by the radiator 10, the number of parts in the heat pump air-conditioning system is effectively saved, and the cost of the heat pump air-conditioning system is greatly reduced.
Referring to fig. 3, a schematic diagram of a refrigeration principle of the heat pump air conditioning system shown in fig. 2 in the embodiment of the invention is shown. As shown, the refrigerant circuit 2 may further include: an evaporator 101 and an outdoor condenser 102; the compressor 30, the outdoor condenser 40, and the evaporator 101 form a refrigeration circuit through refrigerant lines; when cooling the vehicle, the compressor 30 is used to circulate the refrigerant in the refrigerant line between the outdoor condenser 102 and the evaporator 101, where the refrigerant gives off heat in the outdoor condenser 102 and absorbs heat in the evaporator 101.
The heat pump air-conditioning system provided by the embodiment of the invention has the advantages that the refrigeration performance and the refrigeration loop are not influenced, the low-temperature cooling water loop is fully utilized, the whole vehicle heat management is integrated, the problem that the surface of an outdoor heat exchanger is easy to frost is effectively avoided, the environmental heat can be utilized more greatly, and the energy saving and the environmental protection are realized.
In practice, the battery and/or motor heat sink modules 60, 70 may be cooled simultaneously while cooling the vehicle passenger compartment. After the high-temperature and high-pressure refrigerant steam discharged by the compressor 30 emits heat through the outdoor condenser, the evaporator 101 absorbs the heat and simultaneously absorbs the heat through the heat exchanger 20, so that the water temperature of the heat exchanger 20 is reduced to form low-temperature water, the low-temperature water enters the battery heat dissipation module 60 through the circulation of the heating water loop, and/or the motor heat dissipation module 70 absorbs the heat to form high-temperature water and then flows back to the heat exchanger 20, and the circulation is performed so as to finish refrigeration for the vehicle passenger compartment, and/or the battery heat dissipation module 60 and the motor heat dissipation module 70.
Optionally, multiple refrigeration modes can be set, so that a user can select more conveniently, and the refrigeration of the vehicle can better meet the requirements of the user, for example, a passenger compartment refrigeration mode is used for refrigerating a passenger compartment; a battery cooling mode for separately cooling the vehicle battery module; a hybrid cooling mode for cooling both the passenger compartment and the battery.
The temperature of the high-temperature water is higher than that of the low-temperature water in the embodiment of the invention, and the high-temperature water and the low-temperature water are relatively high-temperature water and low-temperature water.
In the embodiment of the present invention, the refrigerant circuit 2 further includes: and a second expansion valve 103, the second expansion valve 103 being disposed between the outdoor condenser 102 and the evaporator 101, the second expansion valve 103 controlling a flow rate of the refrigerant flowing to the evaporator 101.
In practical applications, the second expansion valve 103 may be configured to be the same as or different from the first expansion valve 100. For example, the aperture of the second expansion valve 103 may be made larger than that of the first expansion valve 100, so that the refrigerant passing through the heat exchanger 20 absorbs more heat, thereby avoiding the vehicle battery or the motor from being overheated to cause a failure, and effectively improving the service life of the vehicle battery or the motor.
Optionally, the heat pump air conditioning system may further include: the temperature sensor is arranged in a passenger compartment of the vehicle, and the compressor 30 adjusts the rotating speed according to the temperature of the passenger compartment acquired by the temperature sensor.
In the embodiment of the present invention, a temperature sensor may be further disposed in the passenger compartment of the vehicle, so as to control the rotation speed adjustment of the compressor 30 according to the temperature of the passenger compartment collected by the temperature sensor. Specifically, one or more temperature sensors may be provided, and when a plurality of temperature sensors are provided, the rotation speed adjustment of the compressor 30 may be controlled by the average temperature collected by the plurality of temperature sensors, so as to control the temperature of the passenger compartment more accurately.
To sum up, the heat pump air conditioning system of the embodiment of the invention has the following advantages:
in the embodiment of the invention, the water outlet of the radiator is connected with the water inlet of the heat exchanger, the water inlet of the radiator is connected with the water outlet of the heat exchanger, the compressor, the water-cooled condenser and the heat exchanger are sequentially connected through a refrigerant pipeline to form a refrigerant loop, the water inlet of the warm air module is connected with the water outlet of the water-cooled condenser through a water pipeline, and the water outlet of the warm air module is connected with the water inlet of the water-cooled condenser through a water pipeline, so that heat absorbed by the radiator can be transferred to the refrigerant through the heat exchanger, the refrigerant can transfer heat to the warm air module through the water-cooled condenser, and finally, a vehicle is heated through the warm air module. In the embodiment of the invention, the radiator is used for replacing an outdoor heat exchanger in the prior art to absorb heat, and because the heat-conducting medium running in the radiator is water (or cooling liquid), the integral temperature of the radiator is relatively uniform and frosting phenomenon is not easy to occur even when the radiator absorbs heat under winter working conditions or low-temperature working conditions, so that the heat pump air-conditioning system in the embodiment of the invention not only can effectively avoid the problem that the surface of the outdoor heat exchanger is easy to froste, but also can utilize environmental heat to a greater extent, and is more energy-saving and environment-friendly.
The present invention also provides a vehicle, which may specifically include: the heat pump air conditioning system.
In the vehicle according to the embodiment of the present invention, since the water outlet of the radiator is connected to the water inlet of the heat exchanger, the water inlet of the radiator is connected to the water outlet of the heat exchanger, the compressor, the water-cooled condenser and the heat exchanger are sequentially connected to form a refrigerant loop through a refrigerant pipeline, the water inlet of the warm air module is connected to the water outlet of the water-cooled condenser through a water pipeline, and the water outlet of the warm air module is connected to the water inlet of the water-cooled condenser through a water pipeline, heat absorbed by the radiator can be transferred to the refrigerant through the heat exchanger, and the refrigerant can transfer heat to the warm air module through the water-cooled condenser, and finally the warm air module supplies heat to the vehicle. In the embodiment of the invention, the radiator is used for replacing an outdoor heat exchanger in the prior art to absorb heat, and because the heat-conducting medium running in the radiator is water (cooling liquid), the integral temperature of the radiator is uniform and frosting phenomenon is not easy to occur even when the radiator absorbs heat under winter working condition or low-temperature working condition, so that the heat pump air-conditioning system in the embodiment of the invention not only can effectively avoid the problem that the surface of the outdoor heat exchanger is easy to froste, but also can utilize environmental heat to a greater extent, and is more energy-saving and environment-friendly.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A heat pump air conditioning system for a vehicle, comprising: a refrigerant circuit, a heating water circuit and a heating water circuit; wherein
The heating water circuit includes: the water outlet of the radiator is connected with the water inlet of the heat exchanger, and the water inlet of the radiator is connected with the water outlet of the heat exchanger; the radiator is used for absorbing the heat of air and transferring the heat to the heat exchanger through water;
the refrigerant circuit includes: the compressor, the water-cooled condenser and the heat exchanger are sequentially connected through a refrigerant pipeline; when heating the vehicle, the compressor is used for circulating the refrigerant in the refrigerant pipeline between the water-cooled condenser and the heat exchanger, and the refrigerant gives off heat in the water-cooled condenser and absorbs heat in the heat exchanger;
the heating water circuit includes: the warm braw module, the water inlet of warm braw module with water cooled condenser's delivery port passes through water pipeline and links to each other, the delivery port of warm braw module with water cooled condenser's water inlet passes through the pipeline and links to each other, the refrigerant is in heat that water cooled condenser emitted passes through water transfer extremely the warm braw module, and pass through the warm braw module is provided the vehicle heating.
2. The heat pump air conditioning system of claim 1, wherein the heating water circuit further comprises: a battery heat dissipation module;
the water outlet of the battery heat dissipation module is connected with the water inlet of the heat exchanger, and the water inlet of the battery heat dissipation module is connected with the water outlet of the heat exchanger; the battery heat dissipation module is used for transferring heat dissipated by the battery on the vehicle to the heat exchanger.
3. The heat pump air conditioning system of claim 1, wherein the heating water circuit further comprises: a motor heat dissipation module;
the water outlet of the motor heat dissipation module is connected with the water inlet of the heat exchanger, and the water inlet of the motor heat dissipation module is connected with the water outlet of the heat exchanger; the motor heat dissipation module is used for transferring heat dissipated by the motor unit on the vehicle to the heat exchanger.
4. The heat pump air conditioning system of claim 1, wherein the heating water circuit further comprises: the electric heater, the electric heater set up in the water-cooled condenser delivery port with between the warm braw module, the electric heater is used for giving the water that the water-cooled condenser flows heats, in order to assist the warm braw module gives the vehicle heating.
5. The heat pump air conditioning system of claim 1, wherein the refrigerant circuit further comprises: and the first expansion valve is arranged between the water-cooled condenser and the heat exchanger and is used for controlling the flow of the refrigerant flowing to the heat exchanger.
6. The heat pump air conditioning system of claim 1, wherein the refrigerant circuit further comprises: an evaporator and an outdoor condenser;
the compressor, the outdoor condenser and the evaporator form a refrigeration loop through refrigerant pipelines;
the compressor is configured to circulate refrigerant in the refrigerant line between the outdoor condenser and the evaporator when cooling the vehicle, the refrigerant releasing heat in the outdoor condenser and absorbing heat in the evaporator.
7. The heat pump air conditioning system of claim 6, wherein the refrigerant circuit further comprises: and a second expansion valve disposed between the outdoor condenser and the evaporator, the second expansion valve being used to control a flow rate of the refrigerant flowing to the evaporator.
8. The heat pump air conditioning system of claim 1, wherein the heating water circuit further comprises: the radiator fan is arranged opposite to the radiator and used for improving the heat absorbed by the radiator.
9. The heat pump air conditioning system of claim 1, further comprising: the temperature sensor is arranged in a passenger compartment of the vehicle, and the compressor adjusts the rotating speed according to the temperature of the passenger compartment acquired by the temperature sensor.
10. A vehicle, characterized in that it comprises a heat pump air conditioning system according to any one of claims 1-9.
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| CN201910818106.5A CN112440658A (en) | 2019-08-30 | 2019-08-30 | Heat pump air conditioning system and vehicle |
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| CN201910818106.5A CN112440658A (en) | 2019-08-30 | 2019-08-30 | Heat pump air conditioning system and vehicle |
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