CN115551726A - Air conditioner for vehicle - Google Patents

Air conditioner for vehicle Download PDF

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Publication number
CN115551726A
CN115551726A CN202180021060.XA CN202180021060A CN115551726A CN 115551726 A CN115551726 A CN 115551726A CN 202180021060 A CN202180021060 A CN 202180021060A CN 115551726 A CN115551726 A CN 115551726A
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CN
China
Prior art keywords
heat medium
vehicle
heating
heat
refrigerant
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
Application number
CN202180021060.XA
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Chinese (zh)
Inventor
石关徹也
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Sanden Corp
Original Assignee
Sanden Corp
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Filing date
Publication date
Application filed by Sanden Corp filed Critical Sanden Corp
Publication of CN115551726A publication Critical patent/CN115551726A/en
Pending legal-status Critical Current

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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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • 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
    • B60H1/00899—Controlling the flow of liquid in a heat pump system
    • B60H1/00921—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant does not change and there is an extra subcondenser, e.g. in an air duct
    • 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
    • B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
    • B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
    • 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
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • 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
    • B60H2001/00949—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 comprising additional heating/cooling sources, e.g. second evaporator
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0409—Refrigeration circuit bypassing means for the evaporator
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0411—Refrigeration circuit bypassing means for the expansion valve or capillary tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2501—Bypass 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2519—On-off valves

Abstract

The invention provides an air conditioner for a vehicle, which can reduce the heating device and can simultaneously heat vehicle-mounted equipment such as a battery and air condition in a carriage. Has a heater core (23) for heating air supplied into a vehicle compartment and a heat medium circulation circuit (61) for circulating a heat medium in a battery (55) and the heater core. The heating medium circulation loop comprises: a circulation pump (62); a heat medium heater (66); and a flow path switching device (60) for switching the flow path to a state in which the heat medium passing through the heat medium heater flows through the battery without flowing through the heater core, a state in which the heat medium flows through both the battery and the heater core, and a state in which the heat medium flows through the heater core without flowing through the battery.

Description

Air conditioner for vehicle
Technical Field
The present invention relates to an air conditioner for conditioning air in a vehicle cabin, and more particularly to an air conditioner for a vehicle capable of adjusting the temperature of equipment mounted on the vehicle.
Background
With recent environmental issues becoming more prominent, vehicles such as hybrid vehicles and electric vehicles, which drive a traveling motor by electric power supplied from a battery mounted on the vehicle, have become popular. As an air conditioning apparatus applicable to such a vehicle, an apparatus has been developed which includes a compressor, a radiator, a heat absorber, and a refrigerant circuit to which an outdoor heat exchanger is connected, and heats the vehicle interior by radiating heat from the refrigerant discharged from the compressor in the radiator and absorbing heat from the refrigerant radiated from the radiator in the outdoor heat exchanger, and cools the vehicle interior by radiating heat from the refrigerant discharged from the compressor in the outdoor heat exchanger and absorbing heat in the heat absorber (see, for example, patent document 1).
On the other hand, the battery (vehicle-mounted device) has a reduced charge/discharge performance in a low-temperature environment. Further, if charging and discharging are performed in an environment of high temperature due to self-heating or the like, deterioration is accelerated, and finally, there is a possibility that malfunction may occur and damage may occur. Therefore, the following devices have also been developed: the temperature of the battery can be adjusted by circulating a heat medium (cooling water) cooled by heat exchange with a refrigerant circulating in the refrigerant circuit and a heat medium heated by the heating device through the battery (see, for example, patent documents 2 and 3).
Documents of the prior art
Patent literature
Patent document 1: japanese patent laid-open No. 2014-213765
Patent document 2: japanese patent No. 5668700
Patent document 3: japanese patent No. 5440426
Disclosure of Invention
Technical problems to be solved by the invention
Here, as in patent document 1, such a vehicle air conditioner is provided with an auxiliary heating device constituted by a heat medium circulation circuit that heats a heat medium by an electric heater and heats air supplied into a vehicle compartment by the heated heat medium to assist heating in the vehicle compartment. In addition, as in patent document 3, when a heat medium circulation circuit (cooling water circulation circuit) including a heating device for heating the battery is provided, there arises a problem that the device becomes large in size and the manufacturing cost also increases.
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide an air conditioner for a vehicle, which can heat a vehicle-mounted device such as a battery, reduce the number of heating devices in a capacity map, and simultaneously achieve both heating of the vehicle-mounted device and air conditioning of the vehicle interior.
Means for solving the problems
The air conditioner for a vehicle according to the present invention is an air conditioner for a vehicle having a heater core for heating air supplied into a vehicle cabin and performing air conditioning in the vehicle cabin, the air conditioner for a vehicle including a heat medium circulation circuit for circulating a heat medium between a vehicle-mounted device and the heater core, the heat medium circulation circuit including: a circulation device for circulating the heating medium; a heating device for heating the heating medium; and a flow path switching device for switching the flow path to a state in which the heat medium passing through the heating device flows through the vehicle-mounted device without flowing through the heater core, a state in which the heat medium flows through both the vehicle-mounted device and the heater core, and a state in which the heat medium flows through the heater core without flowing through the vehicle-mounted device.
The air conditioner for a vehicle according to the invention of claim 2 is characterized in that, in the above invention, the air conditioner includes: a compressor for compressing a refrigerant; a radiator for radiating heat from the refrigerant to heat air supplied into the vehicle compartment; an outdoor heat exchanger disposed outside the vehicle compartment; and a refrigerant-to-heat medium heat exchanger for heat exchanging the refrigerant with a heat medium, thereby extracting heat from the heat medium to the refrigerant.
In the air conditioner for a vehicle according to the invention of claim 3, in the above invention, the refrigerant-heat medium heat exchanger is disposed between the flow switching device and the vehicle-mounted device, and exchanges heat between the heat medium flowing into the vehicle-mounted device and the refrigerant.
The vehicle air conditioner according to the invention of claim 4 is characterized in that the above invention includes a flow path control device for controlling the inflow of the refrigerant into the refrigerant-heat medium heat exchanger.
The vehicle air conditioner according to the invention of claim 5 is characterized in that, in the above invention, the vehicle air conditioner includes a controller for controlling the heat medium circulation circuit, the controller including: a 1 st heat medium circulation mode in which the heating device is caused to generate heat and the heat medium heated by the heating device is caused to flow through the vehicle-mounted device by the flow path switching device without flowing through the heater core; a 2 nd heat medium circulation mode in which the heating device is caused to generate heat and the heat medium heated by the heating device is caused to flow through both the vehicle-mounted device and the heater core by the flow path switching device; and a 3 rd heat medium circulation mode in which the heating device is caused to generate heat, and the heat medium heated by the heating device is caused to flow through the heater core by the flow path switching device without flowing through the vehicle-mounted device.
In the air conditioning apparatus for a vehicle according to the invention of claim 6, in the above invention, the controller is configured to execute the heating mode of the vehicle-mounted device in which the heat medium circulation circuit is set to the 1 st heat medium circulation mode by preventing the refrigerant from flowing into the refrigerant-heat medium heat exchanger by the flow path controller when the vehicle-mounted device needs to be heated and the heating capacity of the radiator is not insufficient.
The air conditioner for a vehicle according to the invention of claim 7 is characterized in that, in the invention according to claim 5 or claim 6, the controller causes the flow path controller to flow the refrigerant through the refrigerant-heat medium heat exchanger and to execute the 1 st vehicle-mounted device heating/auxiliary heating mode in which the heat medium circulation circuit is set to the 1 st heat medium circulation mode, when the vehicle-mounted device needs to be heated and the heating capacity of the radiator is insufficient.
In the air conditioner for a vehicle according to the invention of claim 8, in the above-described invention, the controller causes the flow path controller to flow the refrigerant through the refrigerant-heat medium heat exchanger and to execute the 2 nd vehicle-mounted device heating/auxiliary heating mode in which the heat medium circulation circuit is set to the 2 nd heat medium circulation mode, when the temperature Twin of the heat medium flowing into the vehicle-mounted device in the 1 st vehicle-mounted device heating/auxiliary heating mode is higher than the predetermined permissible value T2 or even when the heating capacity of the radiator is insufficient in the 1 st vehicle-mounted device heating/auxiliary heating mode.
The air conditioner for a vehicle according to the invention of claim 9 is characterized in that, in the invention of claims 5 to 8, the controller performs the auxiliary heating mode in which the heat medium circulation circuit is set to the 3 rd heat medium circulation mode while preventing the refrigerant from flowing into the refrigerant-heat medium heat exchanger by the flow path controller when the vehicle-mounted device does not need to be heated and the heating capacity of the radiator is insufficient.
The air conditioner for a vehicle of the invention of claim 10 is characterized in that, in the invention of claims 6 to 9, the controller determines that the vehicle-mounted equipment needs to be heated when the temperature TB of the vehicle-mounted equipment or the temperature Twout of the heat medium passing through the vehicle-mounted equipment is lower than the predetermined value T1, and determines that the heating capacity of the radiator is insufficient when the heating temperature TH, which is the temperature of the air on the leeward side of the radiator, is lower than the target outlet temperature TAO, which is the target value of the temperature of the air blown out into the vehicle compartment, or the target heater temperature TCO, which is the target value of the heating temperature TH derived from the target outlet temperature TAO.
The air conditioner for a vehicle of the invention of claim 11 is characterized in that, in the invention of claims 6 to 10, the control device calculates the required heat amount of the heating device based on the heat amount required for heating the vehicle-mounted equipment and/or the heat amount corresponding to the amount of insufficient heating capacity of the radiator.
In the air conditioner for a vehicle according to the invention of claim 12, in each of the above inventions, the vehicle-mounted device is a heat medium circulation circuit or a battery that supplies power to the heat medium circulation circuit and the compressor.
Effects of the invention
According to the present invention, in a vehicle air conditioner having a heater core for heating air supplied into a vehicle cabin and performing air conditioning in the vehicle cabin, the vehicle air conditioner is configured to include a heat medium circulation circuit for circulating a heat medium between a vehicle-mounted device and the heater core, the heat medium circulation circuit including: a circulation device for circulating the heating medium; a heating device for heating the heating medium; and a flow path switching device for switching the flow path to a state in which the heat medium having passed through the heating device flows through the vehicle-mounted device without flowing through the heater core, a state in which the heat medium flows through both the vehicle-mounted device and the heater core, and a state in which the heat medium has passed through the heater core without flowing through the vehicle-mounted device. Thus, for example, as in the invention according to claim 12, when the vehicle-mounted device is a battery, temperature adjustment can be performed to maintain the performance of the vehicle-mounted device, such as maintaining the charge/discharge characteristics of the battery.
In addition, when only heating in the vehicle compartment is required, the flow switching device is switched to a state in which the heat medium passing through the heating device flows through the heater core and does not flow through the vehicle-mounted equipment, so that heating in the vehicle compartment can be performed by heat generated by the heating device. That is, the heating device for heating the vehicle-mounted equipment can also perform heating in the vehicle cabin, and the reduction of space and cost due to the reduction of the heating device is intended to be achieved.
In particular, according to the present invention, when both heating of the vehicle-mounted device and heating of the vehicle interior are required, both heating of the vehicle-mounted device and heating of the vehicle interior by the heater core can be realized by utilizing heat generation of the heater by switching the flow switching device to a state in which the heat medium having passed through the heater flows through both the vehicle-mounted device and the heater core. Thus, according to the present invention, the heating device for heating the vehicle-mounted device can smoothly achieve both the performance maintenance of the vehicle-mounted device and the heating of the vehicle interior.
In addition to the above invention, the air conditioner for a vehicle according to the invention of claim 2 includes: a compressor for compressing a refrigerant; a radiator for radiating heat from the refrigerant to heat air supplied into the vehicle compartment; an outdoor heat exchanger disposed outside the vehicle compartment; and a refrigerant-heat medium heat exchanger for exchanging heat between the refrigerant and the heat medium to thereby extract heat from the heat medium to the refrigerant, so that heat is extracted from the heat medium to the refrigerant in the refrigerant-heat medium heat exchanger, and heat generated by the heating device is delivered to the radiator, thereby enabling heating assistance in the vehicle compartment.
Here, when the heating capacity of the radiator is significantly insufficient and the heater core is required to perform a large heating assistance, the amount of heat generated by the heating device needs to be increased. On the other hand, when the heat medium is caused to flow through both the vehicle-mounted device and the heater core as described above, if the amount of heat generated by the heating device is increased, the temperature of the heat medium flowing through the vehicle-mounted device becomes higher than the allowable range in the vehicle-mounted device, and there is a risk of deterioration of the vehicle-mounted device.
In the invention according to claim 2, since the heat medium is cooled by exchanging heat with the refrigerant in the refrigerant-heat medium heat exchanger, the temperature of the heat medium flowing through the vehicle-mounted device can be reduced to a range allowed in the vehicle-mounted device even if the amount of heat generated by the heating device is increased in a state where the heat medium is flowing through both the vehicle-mounted device and the heater core. This prevents the temperature of the heat medium flowing through the vehicle-mounted device from becoming higher than an allowable value, and also enables more efficient heating assistance by the heater core, and enables the vehicle interior to be more comfortably air-conditioned, thereby enabling the range of heating operation to be expanded. In addition, the control of the heat medium circulation circuit in this case can be simplified.
In particular, as in the invention according to claim 3, when the refrigerant-heat medium heat exchanger is disposed between the flow switching device and the vehicle-mounted device and the heat medium flowing into the vehicle-mounted device is heat-exchanged with the refrigerant, heat can be extracted from the heat medium flowing into the vehicle-mounted device, and the temperature of the heat medium flowing into the vehicle-mounted device can be accurately reduced to a range allowed by the vehicle-mounted device. Since the refrigerant absorbs heat from the heat medium diverted to the vehicle-mounted device side by the flow switching device, the heating capacity by the heater core can be ensured.
Further, as in the invention of claim 4, by providing the flow path control device for controlling the inflow of the refrigerant into the refrigerant-heat medium heat exchanger, the load on the compressor can be reduced by preventing the refrigerant from flowing through the refrigerant-heat medium heat exchanger by the flow path control device without the need to lower the temperature of the heat medium in the case where the refrigerant-heat medium heat exchanger does not need to extract heat from the heat medium.
Further, according to the invention of claim 5, the vehicle air conditioner includes a controller for controlling the heat medium circulation circuit, the controller including: a 1 st heat medium circulation mode in which the heating device is caused to generate heat and the heat medium heated by the heating device is caused to flow through the vehicle-mounted device without flowing through the heater core by the flow path switching device; a 2 nd heat medium circulation mode in which the heating device is caused to generate heat and the heat medium heated by the heating device is caused to flow through both the vehicle-mounted device and the heater core by the flow path switching device; and a 3 rd heat medium circulation mode in which the heating device is caused to generate heat, and the heat medium heated by the heating device is caused to flow through the heater core by the flow path switching device without flowing through the vehicle-mounted device, so that the controller can execute the 1 st heat medium circulation mode to heat the vehicle-mounted device, the controller can execute the 2 nd heat medium circulation mode to realize both heating of the vehicle-mounted device and heating assistance by the heater core, and the controller can execute the 3 rd heat medium circulation mode to smoothly perform heating assistance by the heater core.
In particular, as in the invention according to claim 6, when the vehicle-mounted device needs to be heated and the heating capacity of the radiator is not insufficient, the control device prevents the refrigerant from flowing into the refrigerant-heat medium heat exchanger by the flow path control device and executes the vehicle-mounted device heating mode in which the heat medium circulation circuit is set to the 1 st heat medium circulation mode, whereby the heating of the vehicle-mounted device by the heating device can be efficiently performed without flowing the refrigerant through the refrigerant-heat medium heat exchanger when the vehicle-mounted device needs to be heated and the heating capacity of the radiator is not insufficient.
On the other hand, as in the invention according to claim 7, when the vehicle-mounted device needs to be heated and the heating capacity of the radiator is insufficient, the controller causes the flow path controller to flow the refrigerant through the refrigerant-heat medium heat exchanger and to execute the 1 st vehicle-mounted device heating/auxiliary heating mode in which the heat medium circulation circuit is set to the 1 st heat medium circulation mode, thereby enabling both heating of the vehicle-mounted device and heating assistance in the vehicle compartment by transferring heat absorbed by the refrigerant-heat medium heat exchanger to the radiator.
Further, as in the invention according to claim 8, when the temperature Twin of the heat medium flowing into the vehicle-mounted device is higher than the predetermined allowable value T2 in the 1 st vehicle-mounted device heating/auxiliary heating mode or when the heating capacity of the radiator is insufficient even in the 1 st vehicle-mounted device heating/auxiliary heating mode, the controller causes the refrigerant to flow through the refrigerant-heat medium heat exchanger by the flow path controller and executes the 2 nd vehicle-mounted device heating/auxiliary heating mode in which the heat medium circulation circuit is set to the 2 nd heat medium circulation mode, thereby enabling both heating of the vehicle-mounted device and heating assistance by the heater core.
In particular, in this case, heating assistance in the vehicle compartment is performed by conveying the heat extracted by the refrigerant-heat medium heat exchanger to the radiator via the refrigerant, and the heat medium flowing into the vehicle-mounted device is cooled, so that even if the heating capacity of the heater core is increased by increasing the amount of heat generated by the heating device as described above, the temperature of the heat medium flowing into the vehicle-mounted device can be appropriately maintained at an allowable value, and deterioration of the vehicle-mounted device can be prevented.
Further, as in the invention according to claim 9, when the vehicle-mounted device does not need to be heated and the heating capacity of the radiator is insufficient, the control device performs the auxiliary heating mode in which the heat medium circulation circuit is set to the 3 rd heat medium circulation mode while preventing the refrigerant from flowing into the refrigerant-heat medium heat exchanger by the flow path control device, thereby enabling the heating device for heating the vehicle-mounted device to efficiently assist heating in the vehicle compartment.
As in the invention of claim 10, when the control device determines that the vehicle-mounted device needs to be heated when the temperature TB of the vehicle-mounted device or the temperature Twout of the heat medium passing through the vehicle-mounted device is lower than the predetermined value T1, and determines that the heating capacity of the radiator is insufficient when the heating temperature TH, which is the temperature of the air on the leeward side of the radiator, is lower than the target outlet temperature TAO, which is the target value of the temperature of the air blown into the vehicle compartment, or the target heater temperature TCO, which is the target value of the heating temperature TH derived from the target outlet temperature TAO, the control device can smoothly realize each of the above modes.
Further, as in the invention according to claim 11, if the control device calculates the required heat amount of the heating device based on the required heat amount of the vehicle-mounted device for heating and/or the heat amount corresponding to the insufficient heating capacity of the radiator, it is possible to accurately achieve both of the heating of the vehicle-mounted device and the heating assistance in the vehicle compartment by the heating device for heating the vehicle-mounted device.
Drawings
Fig. 1 is a configuration diagram (heating operation) of an embodiment of an air conditioner for a vehicle to which the present invention is applied.
Fig. 2 is a block diagram of an air conditioner controller as a control device of the vehicle air conditioner of fig. 1.
Fig. 3 is a diagram illustrating an auxiliary heating mode (3 rd heat medium circulation mode) performed by the air conditioning controller of fig. 2.
Fig. 4 is a diagram illustrating a vehicle-mounted device heating mode (1 st heat medium circulation mode) performed by the air conditioning controller of fig. 2.
Fig. 5 is a diagram illustrating the 1 st vehicle-mounted device heating/auxiliary heating mode (1 st heat medium circulation mode) performed by the air conditioning controller of fig. 2.
Fig. 6 is a diagram illustrating a 2 nd vehicle-mounted device heating/auxiliary heating mode (2 nd heat medium circulation mode) performed by the air conditioning controller of fig. 2.
Fig. 7 is a flowchart illustrating control of the battery (vehicle-mounted device) heating and the auxiliary heating by the air conditioning controller of fig. 2.
Fig. 8 is a timing chart for explaining transition from the 1 st vehicle-mounted device heating/auxiliary heating mode to the 2 nd vehicle-mounted device heating/auxiliary heating mode.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Fig. 1 shows a configuration diagram of a vehicle air conditioner 1 to which an embodiment of the present invention is applied. A vehicle to which an embodiment of the present invention is applied is an Electric Vehicle (EV) not equipped with an engine (internal combustion engine), and the vehicle is equipped with a battery 55 (for example, a lithium ion battery: a vehicle-mounted device), and is driven to travel by supplying electric power charged in the battery 55 from an external power supply to a motor for traveling. The vehicle air conditioner 1 including the heat medium circulation circuit 61 and the compressor 2 described later is also powered and driven by the battery 55.
That is, in the electric vehicle that cannot perform heating using the engine waste heat, the vehicular apparatus 1 performs the heating operation by the heat pump device HP having the refrigerant circuit R, and further performs the air conditioning operation of each of the dehumidification heating operation, the dehumidification cooling operation, and the cooling operation selectively to perform the air conditioning operation in the vehicle cabin. The present invention is not limited to the electric vehicle, and is naturally effective for a so-called hybrid vehicle using both an engine and a traveling motor.
The air conditioning apparatus 1 for a vehicle according to the embodiment performs air conditioning (heating, cooling, dehumidifying, and ventilation) in the vehicle compartment of an electric vehicle, and includes a refrigerant circuit R of a heat pump device HP formed by sequentially connecting, by a cooling pipe 13: an electric compressor (electric compressor) 2, the compressor 2 being powered by a battery 55 and compressing a refrigerant; a radiator 4 provided in an air flow path 3 of the HVAC unit 10 that ventilates and circulates air in the vehicle compartment, for flowing a high-temperature and high-pressure refrigerant discharged from the compressor 2 through a refrigerant pipe 13G and radiating heat from the refrigerant to heat air supplied into the vehicle compartment; an outdoor expansion valve 6, the outdoor expansion valve 6 being constituted by an electric valve for decompressing and expanding the refrigerant during heating; an outdoor heat exchanger 7 for performing heat exchange between the refrigerant and outside air, the outdoor heat exchanger 7 functioning as a condenser for radiating heat of the refrigerant during cooling and functioning as an evaporator for absorbing heat of the refrigerant during heating; an indoor expansion valve 8, the indoor expansion valve 8 being constituted by an electric valve for decompressing and expanding the refrigerant; a heat absorber 9, provided in the air flow path 3, for cooling the air supplied into the vehicle compartment by absorbing heat from the inside and outside of the vehicle compartment by the refrigerant during cooling (during dehumidification); and a memory (accumulator) 12 and the like. The outdoor expansion valve 6 and the indoor expansion valve 8 can decompress and expand the refrigerant, and can be fully opened and fully closed.
In addition, the outdoor heat exchanger 7 is provided with an outdoor blower 15. The outdoor fan 15 is configured to forcibly ventilate the outdoor air and the outdoor heat exchanger 7 to exchange heat between the outdoor air and the refrigerant, and thereby ventilate the outdoor air and the outdoor heat exchanger 7 even during a stop (i.e., a vehicle speed of 0 km/h).
The refrigerant pipe 13A connected to the refrigerant outlet side of the outdoor heat exchanger 7 is connected to the refrigerant pipe 13B via a check valve 18. The check valve 18 is disposed such that the refrigerant pipe 13B side is oriented in the forward direction, and the refrigerant pipe 13B is connected to the indoor expansion valve 8.
The refrigerant pipe 13A exiting from the outdoor heat exchanger 7 is branched, and the branched refrigerant pipe 13D is connected to the refrigerant pipe 13C on the outlet side of the heat absorber 9 through the solenoid valve 21 that is opened during heating. Then, the check valve 20 is connected to the refrigerant pipe 13C on the further downstream side of the connection point of the refrigerant pipe 13D, the accumulator 12 is connected to the refrigerant pipe 13C on the further downstream side of the check valve 20, and the accumulator 12 is connected to the refrigerant suction side of the compressor 2. In the check valve 20, the accumulator 12 side is set to the forward direction.
The refrigerant pipe 13E on the outlet side of the radiator 4 is branched into a refrigerant pipe 13J and a refrigerant pipe 13F before the outdoor expansion valve 6 (on the refrigerant upstream side), and the branched one refrigerant pipe 13J is connected to the refrigerant inlet side of the outdoor heat exchanger 7 via the outdoor expansion valve 6. The other refrigerant pipe 13F after branching is connected in communication with the refrigerant pipe 13B on the refrigerant downstream side of the check valve 18 and on the refrigerant upstream side of the indoor expansion valve 8 via the electromagnetic valve 22 that is opened during dehumidification. .
Thus, the refrigerant pipe 13F is connected in parallel to the series circuit of the outdoor expansion valve 6, the outdoor heat exchanger 7, and the check valve 18, and serves as a circuit that bypasses the outdoor expansion valve 6, the outdoor heat exchanger 7, and the check valve 18.
Various suction ports (a suction port 25 is shown as a representative example in fig. 1) such as an outside air suction port and an inside air suction port are formed in the air flow path 3 on the air upstream side of the heat absorber 9, and a suction switching damper 26 is provided in the suction port 25, and the suction switching damper 26 switches the air introduced into the air flow path 3 to inside air which is air in the vehicle compartment (inside air circulation) or outside air which is air outside the vehicle compartment (outside air introduction). Further, an indoor air blower (blower) 27 for sending the introduced inside air or outside air to the airflow path 3 is provided on the air downstream side of the suction switching damper 26.
In fig. 1, reference numeral 23 denotes a heater core as an auxiliary heating device. In the embodiment, the heater core 23 is provided in the airflow path 3 on the windward side of the radiator 4 with respect to the airflow of the airflow path 3. The heated heat medium is configured to circulate through the heater core 23 as described later, and heating assistance in the vehicle compartment can be performed.
Further, an air mix damper 28 is provided in the air flow path 3 on the air upstream side of the radiator 4, and the air mix damper 28 adjusts the ratio of ventilation of the air (internal air or external air) in the air flow path 3 after flowing into the air flow path 3 and passing through the heat absorber 9 to the heater core 23 and the radiator 4. Further, respective outlet ports (representatively, an outlet port 29 is shown in fig. 1) of the FOOT, VENT, and DEF are formed in the air flow path 3 on the air downstream side of the radiator 4, and an outlet port switching damper 31 is provided in the outlet port 29, and the outlet port switching damper 31 performs switching control of the air blown out from the respective outlet ports.
The vehicle air conditioner 1 further includes a heat medium circulation circuit 61, and the heat medium circulation circuit 61 is configured to circulate a heat medium through the battery 55 to adjust the temperature of the battery 55. That is, in the embodiment, the battery 55 serves as the vehicle-mounted device in the present invention.
The heat medium circuit 61 of the present embodiment includes a circulation pump 62 as a circulation device, a refrigerant-heat medium heat exchanger 64, a heat medium heater 66 as a heating device including an electric heater such as a PTC heater, a flow path switching device 60, and the heater core 23, and is connected to the battery 55 through a heat medium pipe 68.
In the case of the embodiment, the heat medium pipe 68A is connected to the discharge side of the circulation pump 62, and the heat medium pipe 68A is connected to the inlet of the heat medium heater 66. The heat medium pipe 68B is connected to the outlet of the heat medium heater 66, and the heat medium pipe 68B is connected to the inlet of the flow switching device 60. A heat medium pipe 68C is connected to one outlet of the flow switching device 60, and the heat medium pipe 68C is connected to an inlet of the heat medium flow 64A of the refrigerant-heat medium heat exchanger 64.
The heat medium flow path 64A of the refrigerant-heat medium heat exchanger 64 is connected to a heat medium pipe 68D, and the heat medium pipe 68D is connected to an inlet of the battery 55. That is, the refrigerant-heat medium heat exchanger 64 (heat medium flow path 64A) is disposed between the flow path switching device 60 and the battery 55 (vehicle-mounted device). The outlet of the battery 55 is connected to the heat medium pipe 68E, and the heat medium pipe 68E is connected to the suction side of the circulation pump 62. The other outlet of the flow switching device 60 is connected to the heat medium pipe 68F, and the heat medium pipe 68F is connected to the inlet of the heater core 23. The outlet of the heater core 23 is connected to a heat medium pipe 68G, and the heat medium pipe 68G is connected to a heat medium pipe 68E.
The flow path switching device 60 used in the present invention is a valve device which includes an inlet and two outlets, one of which is connected to the other of which is connected to the inlet, and the other of which is connected to the outlet, and which is capable of switching the internal flow path to three states, i.e., a state in which the inlet is connected to only one of the outlets, a state in which the inlet is connected to only the other of the outlets, and a state in which the inlet is connected to two of the outlets (one of the outlets and the other of the outlets), by moving the valve body by means of a solenoid or a motor.
Therefore, in a state where the inlet of the flow switching device 60 is communicated with only one outlet, the heat medium discharged from the circulation pump 62 passes through the heat medium heater 66, flows into the heat medium flow path 64A of the refrigerant-heat medium heat exchanger 64, and then flows into the battery 55. In addition, in a state where the inlet of the flow path switching device 60 is communicated with the two outlets, the heat medium discharged from the circulation pump 62 is branched after passing through the heat medium heater 66, one passes through the heat medium flow path 64A of the refrigerant-heat medium heat exchanger 64 and then flows into the battery 55, and the other flows into the heater core 23. In addition, in a state where the inlet of the flow path switching device 60 is communicated with only the other outlet, the heat medium discharged from the circulation pump 62 is configured to flow into the heater core 23 immediately after passing through the heat medium heater 66.
As the heat medium used in the heat medium circuit 61, for example, water, a refrigerant such as HFO-1234yf, a liquid such as a coolant, or a gas such as air can be used. In addition, in the embodiment, water is employed as the heat medium. Further, a case structure is provided around the battery 55, for example, in which a heat medium and the battery 55 can flow in a heat exchange relationship.
As the heat medium circulation mode of the heat medium circulation circuit 61, the air conditioning controller 32 (control device) described later has a 1 st heat medium circulation mode, a 2 nd heat medium circulation mode, and a 3 rd heat medium circulation mode, which are described below.
(1) No. 1 heat medium circulation mode
That is, when the circulation pump 62 is operated and the heat medium heater 66 generates heat when the flow switching device 60 is switched to a state in which the inlet is communicated with only one outlet, the heat medium discharged from the circulation pump 62 flows into the heat medium heater 66 through the heat medium pipe 68A and is heated as indicated by solid arrows in fig. 4 and 5. Then, the heat medium heated by the heat medium heater 66 is circulated as follows: the refrigerant passes through the heat medium pipe 68B, the flow switching device 60, the heat medium pipe 68C, the heat medium flow path 64A of the refrigerant-heat medium heat exchanger 64, the heat medium pipe 68D, the battery 55, and the heat medium pipe 68E in this order, and is sucked into the circulation pump 62. This is the 1 st heat medium circulation mode.
In the 1 st heat medium circulation mode, the heat medium circulates among the heat medium heater 66, the refrigerant-heat medium heat exchanger 64, and the battery 55, and therefore, the battery 55 can be heated by heat generation of the heat medium heater 66. As will be described later, the refrigerant flows through the refrigerant flow path 64B (indicated by the white arrows in fig. 5) of the refrigerant-heat medium heat exchanger 64 and absorbs heat from the heat medium, whereby a part of the heat medium heater 66 is also absorbed by the refrigerant and sent to the radiator 4 to assist heating.
In the flow pattern of the 1 st heat medium circulation mode, the heat medium heater 66 is not heated, and the refrigerant flows through the refrigerant passage 64B of the refrigerant-heat medium exchanger 64 to absorb heat, whereby the waste heat of the battery 55 can be recovered and sent to the radiator 4. In this case, since the battery 55 itself is cooled, even in a situation where the temperature of the battery 55 is excessively high, the battery 55 can be cooled to be in an appropriate temperature range. In the case of the battery 55, the appropriate temperature range is generally set to +25 ℃ to +45 ℃, and therefore, in the embodiment, the upper limit of the appropriate temperature range is set to the predetermined value T3 (+ 45 ℃) and the lower limit thereof is set to the predetermined value T1 (+ 25 ℃).
(2) 2 nd heat medium circulation mode
When the circulation pump 62 is operated and the heat medium heater 66 generates heat when the flow switching device 60 is switched to a state in which the inlet and the two outlets are communicated, the heat medium discharged from the circulation pump 62 flows into the heat medium heater 66 through the heat medium pipe 68A and is heated as indicated by solid arrows in fig. 6. The heat medium heated by the heat medium heater 66 then flows into the flow switching device 60 through the heat medium pipe 68B, and is branched into one outlet and the other outlet.
The heat medium flowing out of the one outlet of the flow switching device 60 circulates as follows in the same manner as described above: the heat medium passes through the heat medium pipe 68C, the heat medium passage 64A of the refrigerant-heat medium heat exchanger 64, the heat medium pipe 68D, the battery 55, and the heat medium pipe 68E in this order, and is sucked into the circulation pump 62. Further, the heat medium flowing out of the other outlet of the flow switching device 60 is circulated as follows: the heat medium flows through the heat medium pipe 68F, the heater core 23, the heat medium pipe 68G, and the heat medium pipe 68E in this order, and is sucked into the circulation pump 62. This is the 2 nd heating medium circulation mode.
In the 2 nd heat medium circulation mode, the heat medium circulates among the heat medium heater 66, the refrigerant-heat medium heat exchanger 64, and the battery 55, and between the heat medium heater 66 and the heater core 23, so that the battery 55 can be heated by heat generation of the heat medium heater 66, and the air flowing through the air flow path 3 can be heated by the heater core 23 to assist heating.
Further, similarly to the above, by causing the refrigerant to flow through the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64 and absorbing heat from the heat medium, heat can be absorbed from the heat medium branched to one outlet by the flow switching device 60 to the refrigerant, and the refrigerant can be sent to the radiator 4 to assist heating. In this case, the heat medium flowing into the battery 55 is cooled, and therefore, the temperature of the heat medium flowing into the battery 55 can be lowered.
(3) 3 rd heat medium circulation mode
Next, when the flow switching device 60 is switched to a state in which the inlet is communicated with only the other outlet, and the circulation pump 62 is operated and the heat medium heater 66 generates heat, the heat medium discharged from the circulation pump 62 circulates as shown by the solid arrow in fig. 3 as follows: the heat medium passes through the heat medium pipe 68A, the heat medium heater 66, the heat medium pipe 68B, the flow switching device 60, the heat medium pipe 68F, the heater core 23, the heat medium pipe 68G, and the heat medium pipe 68E in this order, and is sucked into the circulation pump 62. This is the 3 rd heat medium circulation mode.
In the 3 rd heat medium circulation mode, the heat medium circulates between the heat medium heater 66 and the heater core 23, and therefore, the heat medium heated by the heat medium heater 66 can be circulated in the heater core 23 to heat the air flowing into the heater 4. That is, the heating assist in the vehicle compartment can be performed by the heat medium heater 66 for heating the battery 55.
Here, one end of a branch pipe 72 as a branch circuit is connected to the refrigerant pipe 13B located on the refrigerant downstream side of the outlet of the refrigerant pipe 13F of the refrigerant circuit R, i.e., the connection portion between the refrigerant pipe 13F and the refrigerant pipe 13B, and on the refrigerant upstream side of the indoor expansion valve 8. The branch pipe 72 is provided with an auxiliary expansion valve 73 as a flow path control device constituted by an electrically operated valve. The auxiliary expansion valve 73 controls the flow of the refrigerant into the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64, and fully closes the refrigerant flowing into the refrigerant flow path 64B while decompressing and expanding the refrigerant.
The other end of the branch pipe 72 is connected to the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64, one end of the refrigerant pipe 74 is connected to the outlet of the refrigerant flow path 64B, and the other end of the refrigerant pipe 74 is connected to the refrigerant downstream side of the check valve 20 and to the refrigerant pipe 13C before the accumulator 12 (upstream side of the refrigerant). These auxiliary expansion valve 73 and the like also constitute a part of the refrigerant circuit R of the heat pump device HP and also constitute a part of the heat medium circuit 61.
When the auxiliary expansion valve 73 is opened, the refrigerant (a part or all of the refrigerant) that has flowed out of the refrigerant pipe 13F and the outdoor heat exchanger 7 flows into the branch pipe 72, is reduced in pressure by the auxiliary expansion valve 73, flows into the refrigerant passage 64B of the refrigerant-heat medium heat exchanger 64, and is evaporated there. The refrigerant absorbs heat from the heat medium flowing through the heat medium flow path 64A while flowing through the refrigerant flow path 64B, and is then drawn into the compressor 2 via the accumulator 12. That is, the refrigerant-heat medium heat exchanger 64 cools the heat medium flowing into the battery 55 through the flow switching device 60.
(4) Air conditioner controller 32
Next, in fig. 2, reference numeral 32 denotes an air conditioning controller 32 as a control device for controlling the vehicle air conditioning device 1. The air conditioning controller 32 is constituted by a microcomputer as an example of a computer provided with a processor.
To the input of the air conditioning controller 32 (control device), the respective outputs of the following sensors are connected: an outside air temperature sensor 32, the outside air temperature sensor 32 detecting an outside air temperature (Tam) of the vehicle; an outside air humidity sensor 34, the outside air humidity sensor 34 detecting outside air humidity; an HVAC suction temperature sensor 36, the HVAC suction temperature sensor 36 detecting the temperature of the air sucked into the airflow path 3 from the suction port 25; an inside air temperature sensor 37, the inside air temperature sensor 37 detecting the temperature of air (inside air) in the vehicle compartment; an inside air humidity sensor 38, the inside air humidity sensor 38 detecting the humidity of the air in the vehicle compartment; indoor CO 2 Concentration sensor 39, CO in the chamber 2 The concentration sensor 39 detects the carbon dioxide concentration in the vehicle compartment; an outlet air temperature sensor 41, the outlet air temperature sensor 41 detecting the temperature of the air blown out from the outlet port 29 into the vehicle compartment; a discharge pressure sensor 42, the discharge pressure sensor 42 detecting a discharge refrigerant pressure (discharge pressure Pd) of the compressor 2; a discharge temperature sensor 43, the discharge temperature sensor 43 detecting a temperature of the refrigerant discharged from the compressor 2; a suction temperature sensor 44, the suction temperature sensor 44 detecting a temperature of a suction refrigerant of the compressor 2; a radiator temperature sensor 46, the radiator temperature sensor 46 detecting the temperature of the radiator 4 (the temperature of the air passing through the radiator 4 or the temperature of the radiator 4 itself: radiator temperature TCI); a radiator pressure sensor 47, the radiator pressure sensor 47 detecting the refrigerant pressure of the radiator 4 (the pressure of the refrigerant in the radiator 4 or immediately after leaving the radiator 4: radiator pressure PCI); a heat absorber temperature sensor 48 for detecting the temperature of the heat absorber 9 (the temperature of the air passing through the heat absorber 9 or the temperature of the heat absorber 9 itself: the heat absorber temperature Te); a heat absorber pressure sensor 49 for detecting the refrigerant pressure of the heat absorber 9 (the pressure of the refrigerant inside the heat absorber 9 or immediately after leaving the heat absorber 9); sunshineA sun sensor 51 for detecting the amount of sun shine into the vehicle cabin, the sun shine sensor 51 being of a photosensor type, for example; a vehicle speed sensor 52, the vehicle speed sensor 52 detecting a moving speed (vehicle speed) of the vehicle; an air-conditioning operation unit 53, the air-conditioning operation unit 53 setting switching of a set temperature and air-conditioning operation; an outdoor heat exchanger temperature sensor 54, the outdoor heat exchanger temperature sensor 54 detecting the temperature of the outdoor heat exchanger 7 (the temperature of the refrigerant immediately after leaving the outdoor heat exchanger 7 or the temperature of the outdoor heat exchanger 7 itself: an outdoor heat exchanger temperature TXO. When the outdoor heat exchanger 7 functions as an evaporator, the outdoor heat exchanger temperature TXO becomes the evaporation temperature of the refrigerant in the outdoor heat exchanger 7); and an outdoor heat exchanger pressure sensor 56, the outdoor heat exchanger pressure sensor 56 detecting the refrigerant pressure of the outdoor heat exchanger 7 (the pressure of the refrigerant inside the outdoor heat exchanger 7 or immediately after leaving the outdoor heat exchanger 7).
Further, the air conditioning controller 32 has inputs connected to respective outputs of the following sensors: a battery temperature sensor 76, the battery temperature sensor 76 detecting the temperature of the battery 55 (the temperature of the battery 55 itself: battery temperature TB); a heat medium inlet temperature sensor 78, the heat medium inlet temperature sensor 78 detecting the temperature of the heat medium flowing into the battery 55 through the heat medium flow path 64A of the refrigerant-heat medium heat exchanger 64 (inlet heat medium temperature Twin); and a heat medium outlet temperature sensor 77, the heat medium outlet temperature sensor 77 detecting the temperature of the heat medium (outlet heat medium temperature Twout) leaving the battery 55.
On the other hand, the output of the air conditioning controller 32 is connected to the respective solenoid valves of the compressor 2, the outdoor air-sending device 15, the indoor air-sending device (air-sending device) 27, the suction switching damper 26, the air mixing damper 28, the outlet switching damper 31, the outdoor expansion valve 6, the indoor expansion valve 8, the solenoid valve 22 (dehumidification) and the solenoid valve 21 (heating), the circulation pump 62, the heat medium heater 66, the auxiliary expansion valve 73, and the flow path switching device 60. Then, the air conditioning controller 32 controls these components based on the outputs of the sensors and the settings input by the air conditioning operation unit 53.
With the above configuration, the operation of the vehicular air conditioning device 1 according to the embodiment will be described next. In the present embodiment, the air conditioning controller 32 (control device) performs each of the heating operation, the dehumidification cooling operation, and the cooling operation in a switched manner, and adjusts the temperature of the battery 55 (vehicle-mounted device). First, each air-conditioning operation of the heat pump device HP of the air-conditioning apparatus 1 for a vehicle will be described.
(5) Heating operation
First, the heating operation will be described with reference to fig. 1 and 3 to 6. Fig. 1 and 3 to 6 show the flow of the refrigerant (broken line arrow) in the refrigerant circuit R during the heating operation. When the air-conditioning controller 32 (automatic mode) or the air-conditioning operation unit 53 is manually operated (manual mode) to select the heating operation in a low outside air temperature such as in winter, the air-conditioning controller 32 opens the electromagnetic valve 21 (for heating) and completely closes the indoor expansion valve 8. Further, the electromagnetic valve 22 is closed (for dehumidification).
Then, the compressor 2 and the respective fans 15 and 27 are operated, and the air mix damper 28 is set in a state in which the ratio of the air blown from the indoor fan 27 to the heater core 23 and the radiator 4 is adjusted. Thereby, the high-temperature and high-pressure gas refrigerant discharged from the compressor 2 flows into the radiator 4. Since the air in the air flow path 3 is ventilated to the radiator 4, the air in the air flow path 3 is heated by the high-temperature refrigerant in the radiator 4, while the refrigerant in the radiator 4 is cooled by the heat taken by the air, and condensed and liquefied.
The refrigerant liquefied in the radiator 4 leaves the radiator 4, and then reaches the outdoor expansion valve 6 through the refrigerant pipes 13E and 13J. The refrigerant flowing into the outdoor expansion valve 6 is decompressed by the outdoor expansion valve 6, and then flows into the outdoor heat exchanger 7. The refrigerant flowing into the outdoor heat exchanger 7 evaporates, and extracts heat (absorbs heat) from outside air ventilated by the outdoor blower 15 or by vehicle running. Then, the low-temperature refrigerant that has exited the outdoor heat exchanger 7 passes through the refrigerant pipe 13A, the refrigerant pipe 13D, and the electromagnetic valve 21, reaches the refrigerant pipe 13C, enters the accumulator 12 via the check valve 20 of the refrigerant pipe 13C, undergoes gas-liquid separation therein, and is then sucked into the compressor 2, and the cycle repeats. The air heated by the radiator 4 is blown out from the air outlet 29, and the air in the vehicle compartment is heated.
The air conditioning controller 32 calculates a target radiator pressure PCO (a target value of the pressure PCI of the radiator 4) from a target heater temperature TCO (an air temperature on the leeward side of the radiator 4 (a heating temperature TH to be described later)) calculated from a target outlet air temperature TAO to be described later, controls the rotation speed of the compressor 2 based on the target radiator pressure PCO and the refrigerant pressure of the radiator 4 (the radiator pressure PCI, a high pressure of the refrigerant circuit R) detected by the radiator pressure sensor 47, and controls the valve opening degree of the outdoor expansion valve 6 based on the temperature of the radiator 4 (the radiator temperature TCI) detected by the radiator temperature sensor 46 and the radiator pressure PCI detected by the radiator pressure sensor 47 to control the degree of supercooling of the refrigerant at the outlet of the radiator 4. The target radiator temperature TCO is derived from the target outlet air temperature TAO as described later. When the heating capacity of the radiator 4 is insufficient, the heat medium heater 66 is energized to generate heat to supplement the heating capacity in the vehicle compartment (heating assist), as will be described later.
In the heating operation, the air conditioning controller 32 opens the electromagnetic valve 22 and also opens the auxiliary expansion valve 73 to control the valve opening degree. As a result, a part of the refrigerant that has exited from the radiator 4 is branched off on the refrigerant upstream side of the outdoor expansion valve 6, and reaches the refrigerant upstream side of the indoor expansion valve 8 via the refrigerant pipe 13F, as indicated by the white arrows in fig. 5 and 6. The refrigerant then enters the branch pipe 72, is decompressed by the auxiliary expansion valve 73, and then flows into the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64 through the branch pipe 72 to be evaporated. In this case, an endothermic effect is exerted. The refrigerant evaporated in the refrigerant flow path 64B passes through the refrigerant pipe 74, the refrigerant pipe 13C, and the accumulator 12 in this order and is sucked into the compressor 2, and the cycle is repeated.
(6) Dehumidification and heating operation
Next, in the dehumidification and heating operation, the air conditioning controller 32 opens the electromagnetic valve 22 in the heating operation state, and opens the indoor expansion valve 8 to decompress and expand the refrigerant. As a result, a part of the condensed refrigerant flowing through the refrigerant pipe 13E via the radiator 4 is branched, and the branched refrigerant flows into the refrigerant pipe 13F via the solenoid valve 22, flows from the refrigerant pipe 13B to the indoor expansion valve 8, and flows into the outdoor expansion valve 6. That is, a part of the branched refrigerant is decompressed by the indoor expansion valve 8, flows into the heat absorber 9, and is evaporated.
The air conditioning controller 32 controls the valve opening degree of the indoor expansion valve 8 so as to maintain the superheat degree (SH) of the refrigerant at the outlet of the heat absorber 9 at a predetermined value, but at this time, moisture in the air blown out from the indoor fan 27 is condensed and adheres to the heat absorber 9 due to the heat absorption action of the refrigerant generated in the heat absorber 9, and therefore, the air is cooled and dehumidified. The excess refrigerant branched and flowing into the refrigerant pipe 13J is decompressed by the outdoor expansion valve 6, and then evaporated in the outdoor heat exchanger 7.
The cycle in which the refrigerant evaporated in the heat absorber 9 leaves the refrigerant pipe 13C, joins the refrigerant from the refrigerant pipe 13D (the refrigerant from the outdoor heat exchanger 7), and is then sucked into the compressor 2 via the check valve 20 and the accumulator 12 is repeated. The air dehumidified by the heat absorber 9 is heated again while passing through the radiator 4, and thus the vehicle interior can be dehumidified and heated.
The air conditioning controller 32 controls the rotation speed of the compressor 2 based on the target radiator pressure PCO calculated from the target radiator temperature TCO and the radiator pressure PCI (high pressure of the refrigerant circuit R) detected by the radiator pressure sensor 47, and controls the valve opening degree of the outdoor expansion valve 6 based on the temperature of the heat absorber 9 (heat absorber temperature Te) detected by the heat absorber temperature sensor 48.
(7) Dehumidification refrigeration operation
Next, in the dehumidification cooling operation, the air conditioning controller 32 opens the indoor expansion valve 8 to reduce the pressure of the refrigerant and expands the refrigerant, and closes the electromagnetic valve 21 and the electromagnetic valve 22. Then, the compressor 2 and the respective air-sending devices 15 and 27 are operated, and the air-mixing damper 28 is set in a state in which the ratio of the air blown out from the indoor air-sending device 27 to the heater core 23 and the radiator 4 is adjusted. Thereby, the high-temperature and high-pressure gas refrigerant discharged from the compressor 2 flows into the radiator 4. Since the air in the air flow path 3 is ventilated to the radiator 4, the air in the air flow path 3 is heated by the high-temperature refrigerant in the radiator 4, while the refrigerant in the radiator 4 is cooled by the heat taken by the air, and condensed and liquefied.
The refrigerant leaving the radiator 4 reaches the outdoor expansion valve 6 via the refrigerant pipe 13E, and flows into the outdoor heat exchanger 7 via the outdoor expansion valve 6 controlled to be open. The refrigerant flowing into the outdoor heat exchanger 7 is condensed by the vehicle running or by the air cooling by the outside air ventilated by the outdoor blower 15. The refrigerant that has left the outdoor heat exchanger 7 enters the refrigerant pipe 13B through the refrigerant pipe 13A and the check valve 18, and reaches the indoor expansion valve 8. The refrigerant is decompressed by the indoor expansion valve 8, flows into the heat absorber 9, and evaporates. Due to the heat absorption action at this time, moisture in the air sent from the indoor fan 27 condenses and adheres to the heat absorber 9, and therefore the air is cooled and dehumidified.
The cycle in which the refrigerant evaporated in the heat absorber 9 reaches the accumulator 12 via the refrigerant pipe 13C and the check valve 20, and is sucked into the compressor 2 via the accumulator 12 is repeated. The air cooled and dehumidified by the heat absorber 9 is reheated while passing through the radiator 4 (reheating: lower heat radiation capacity than during heating), and therefore, the interior of the vehicle can be dehumidified and cooled.
The air conditioning controller 32 controls the rotation speed of the compressor 2 to set the heat absorber temperature Te to the target heat absorber temperature TEO based on the temperature of the heat absorber 9 (heat absorber temperature Te) detected by the heat absorber temperature sensor 48 and the target temperature thereof, that is, the target heat absorber temperature TEO, and controls the valve opening of the outdoor expansion valve 6 to set the radiator pressure PCI to the target radiator pressure PCO based on the radiator pressure PCI (high pressure of the refrigerant circuit R) detected by the radiator pressure sensor 47 and the target radiator pressure PCO (target value of the radiator pressure PCI) calculated from the target heater temperature TCO, thereby obtaining the reheating amount required by the radiator 4.
(8) Refrigerating operation
Next, in the cooling operation, the air conditioning controller 32 fully opens the valve opening degree of the outdoor expansion valve 6 in the dehumidification and cooling operation. Further, the air mix damper 28 is set in a state in which the ratio of air ventilation to the heater core 23 and the radiator 4 is adjusted.
Thereby, the high-temperature and high-pressure gas refrigerant discharged from the compressor 2 flows into the radiator 4. The radiator 4 is ventilated with the air in the air flow passage 3, but the ratio thereof is small (reheating is performed only during cooling), and therefore the refrigerant passes through the radiator 4 almost exclusively, and the refrigerant separated from the radiator 4 reaches the outdoor expansion valve 6 through the refrigerant pipe 13E. At this time, since the outdoor expansion valve 6 is fully opened, the refrigerant passes through the refrigerant pipe 13J directly via the outdoor expansion valve 6 and flows into the outdoor heat exchanger 7, where it is cooled and condensed and liquefied by traveling or by outside air ventilated by the outdoor fan 15.
The refrigerant leaving the outdoor heat exchanger 7 enters the refrigerant pipe 13B through the refrigerant pipe 13A and the check valve 18, and reaches the indoor expansion valve 8. The refrigerant is decompressed by the indoor expansion valve 8, flows into the heat absorber 9, and evaporates. At this time, moisture in the air blown from the indoor fan 27 condenses and adheres to the heat absorber 9 due to the heat absorption action, and the air is cooled.
The cycle in which the refrigerant evaporated in the heat absorber 9 reaches the accumulator 12 through the refrigerant pipe 13C and the check valve 20 and is sucked into the compressor 2 through the accumulator 12 is repeated. The air cooled and dehumidified by the radiator 9 is blown into the vehicle cabin through the air outlet 29, thereby cooling the vehicle cabin. In this cooling mode, the air conditioning controller 32 controls the rotation speed of the compressor 2 based on the temperature of the heat absorber 9 (heat absorber temperature Te) detected by the heat absorber temperature sensor 48.
In the cooling operation, when the auxiliary expansion valve 73 is opened and the valve opening degree is controlled, a part of the refrigerant separated from the outdoor heat exchanger 7 is branched at the refrigerant upstream side of the indoor expansion valve 8, enters the branch pipe 72, is reduced in pressure by the auxiliary expansion valve 73, and then flows into the refrigerant flow passage 64B of the refrigerant-heat medium heat exchanger 64 via the branch pipe 72 and is evaporated. In this case, an endothermic effect is exerted. Since the cycle in which the refrigerant evaporated in the refrigerant flow path 64B is sucked into the compressor 2 through the refrigerant pipe 74, the refrigerant pipe 13C, and the accumulator 12 in this order is repeated, the circulation pump 62 is operated, the heat medium heater 66 does not generate heat, and the flow switching device 60 is set to the same flow pattern as the 1 st heat medium circulation mode, whereby the battery 55 can be cooled by the refrigerant and the heat medium.
(9) Switching control of air conditioner operation
The air conditioning controller 32 calculates the target outlet air temperature TAO described above according to the following equation (I). The target outlet air temperature TAO is a target value of the temperature of the air blown out from the outlet port 29 into the vehicle cabin.
TAO＝(Tset－Tin)×K+Tbal(f(Tset、SUN、Tam))
··(I)
Here, tset is a set temperature in the vehicle compartment set in the air-conditioning operation unit 53, tin is a temperature of the air in the vehicle compartment detected by the inside air temperature sensor 37, K is a coefficient, and Tbal is a balance value calculated from the set temperature Tset, the solar radiation amount SUN detected by the solar radiation sensor 51, and the outside air temperature Tam detected by the outside air temperature sensor 33. In general, the lower the outside air temperature Tam, the higher the target outlet air temperature TAO, and the lower the outside air temperature Tam increases.
The air conditioning controller 32 calculates (derives) the target heater temperature TCO using the following equation (II) based on the target outlet air temperature TAO.
TCO＝f(TAO)··(II)
In addition, although f in the above equation (II) means control limitation, offset, and the like, since TCO = TAO is basically set, the target heater temperature TCO increases as the target blowing temperature TAO increases, and the target heater temperature TCO decreases as the target blowing temperature TAO decreases.
In the heating operation, the air conditioning controller 32 calculates (estimates) the heating temperature TH from the following expression (III) which is a single delay operation. The heating temperature TH is the air temperature on the leeward side of the radiator 4, and can be said to be a target value of the target heater temperature TCO.
TH＝(INTL×TH0+Tau×THz)/(Tau+INTL)
··(III)
Here, INTL is an operation period (constant), tau is a time constant of one time delay, TH0 is a steady value which is a value of the heating temperature TH in a steady state before one time delay operation, and THz is a last value of the heating temperature TH.
In the heating operation, the air conditioning controller 32 calculates a target heating capacity TGQhp that is the heating capacity in the vehicle compartment required by the radiator 4 and the heating capacity Qhp that can be generated by the radiator 4, using, for example, the following equations (IV) and (V).
TGQhp＝(TCO－Te)×Cpa×ρ×Qair··(IV)
Qhp＝f(Tam、NC、BLV、VSP、FANVout、Te)··(V)
Here, te is the temperature of the heat absorber 9 detected by the heat absorber temperature sensor 48, cpa is the specific heat [ kj/kg · K ] of the air flowing into the radiator 4]ρ is the density (specific volume) of air flowing into the radiator 4 [ kg/m ] 3 ]Qair is the air flow [ m ] through the radiator 4 3 /h](estimated from the blower voltage BLV of the indoor blower 27, etc.), VSP is the vehicle speed obtained from the vehicle speed sensor 52, and FANvout is the voltage of the outdoor blower 15.
The air conditioning controller 32 selects any one of the air conditioning operations described above based on the outside air temperature Tam detected by the outside air temperature sensor 33 at the time of startup and the target outlet air temperature TAO. After the start, the air conditioning operation is selected and switched according to the environment such as the outside air temperature Tam and the target outlet air temperature TAO and the change in the set conditions.
(10) Heating of battery 55 using heat medium heater 66 and heating assist control by heater core 23
Next, control related to heating of the battery 55 using the heat medium heater 66 and heating assistance in the vehicle compartment by the heater core 23 in the air-conditioning controller 32 will be described with reference to a flowchart shown in fig. 7. In step S1 of fig. 7, the air conditioning controller 32 determines whether or not the battery temperature TB detected by the battery temperature sensor 76 is low (predetermined hysteresis). The determination method in this case is whether or not battery temperature TB is lower than predetermined value T1 (lower limit of the appropriate temperature range of battery 55). The determination is not limited to the battery temperature TB, and may be made using the outlet heat medium temperature Twout detected by the heat medium outlet temperature sensor 77.
In step S1, when the battery temperature TB (or the outlet heat medium temperature twout, the same applies hereinafter) is not lower than the predetermined value T1, the air conditioning controller 32 determines that the battery temperature TB is low and therefore the battery 55 does not need to be heated, and proceeds to step S9 where it is determined whether auxiliary heating is required or not this time. In this case, the determination method is whether the heating temperature TH is lower than the target blowing temperature TAO. The target blowing temperature TAO is not limited to the target blowing temperature TCO, and the target heater temperature TCO may be used instead. In step S9 of the flowchart of the embodiment, ">" means that the heating temperature TH is lower than the target air-out temperature TAO and the difference is equal to or greater than a corresponding value, but this includes a case where the heating temperature TH is lower than the target air-out temperature TAO. In this case, a predetermined hysteresis is also provided.
If the heating temperature TH is not lower than the target outlet air temperature TAO (or the target heater temperature tco. The same applies hereinafter) in step S9, the air conditioning controller 32 determines that the auxiliary heating is not necessary, and proceeds to step S12 to stop the heat medium circulation circuit 61. This state is a state of the heating operation performed by the radiator 4 shown in fig. 1. Instead of stopping the heat medium circulation circuit 61, the heat medium may be circulated through the battery 55 by operating only the circulation pump 62 and setting the flow switching device 60 to the flow pattern of the 1 st heat medium circulation mode. As a result, as described above, the battery 55 can also be cooled by the refrigerant.
(10-1) auxiliary heating mode
On the other hand, if the heating temperature TH is lower than the target outlet air temperature TAO in step S9, the air conditioning controller 32 determines that the heating capacity of the radiator 4 is insufficient and auxiliary heating is necessary, and proceeds to step S10. That is, when the heating capacity of the radiator 4 is insufficient without heating the battery 55, the process proceeds to step S10, and the required heat amount TGQhtr1 of the heat medium heater 66 is calculated. The required heat amount TGQhtr in this case is calculated by, for example, the following formula (VI).
TGQhtr1＝TGQhp－Qhp··(VI)
That is, the air conditioning controller 32 sets the required heat amount TGQhtr1, which is a target value of the heat amount of the heat medium heater 66, to the shortage of the heating capacity of the radiator 4 (TGQhp-Qhp). For example, when the shortage of the heating capacity of the radiator 4 is 2kW, the required heat amount TGQhtr1 of the heat medium heater 66 is 2kW.
Next, the air conditioning controller 32 proceeds to step S11, operates the circulation pump 62 of the heat medium circulation circuit 61, energizes the heat medium heater 66 to generate the required heat amount TGHthr1, and causes the inlet of the flow switching device 60 to communicate with only the other outlet, thereby setting the 3 rd heat medium circulation mode. This is the auxiliary heating mode. In addition, in the embodiment, the circulation pump 62 is driven in a constant speed operation. In the auxiliary heating mode, the air conditioning controller 32 completely closes the auxiliary expansion valve 73 so that the refrigerant does not flow through the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64.
In the auxiliary heating mode, as shown in fig. 3, the heat medium heated by the heat medium heater 66 is circulated to the heater core 23 through the flow switching device 60 by the circulation pump 62, and therefore, the air flowing through the air flow path 3 is heated by the heater core 23, and heating assistance corresponding to an amount insufficient in the heating capacity of the radiator 4 is performed. In addition, in the case of TGQhp = Qhp, TGQhtr1 becomes 0, but in this case, the process proceeds from step S9 to step S12.
(10-2) vehicle-mounted device heating mode
On the other hand, when the battery temperature TB is lower than the predetermined value T1 in step S1, the air conditioning controller 32 proceeds to step S2 to determine whether auxiliary heating is necessary. The determination method in this case is the same as that in the above step S9 (TAO > TH). If the heating temperature TH is not lower than the target outlet air temperature TAO in step S2, the air-conditioning controller 32 determines that auxiliary heating is not necessary and proceeds to step S7.
That is, if the battery 55 needs to be heated but the heating capacity of the radiator 4 is not insufficient, the process proceeds to step S7, and the required heat amount TGQhtr2 of the heat medium heater 66 is calculated. The required heat amount TGQhtr2 in this case is calculated by, for example, the following formula (VII).
TGQhtr2＝f(T1－TB)··(VII)
The right side of the above formula (VII) in the examples is a formula in which the difference between the predetermined value T1 and the battery temperature TB is converted into heat. The required heat amount TGQhtr2 in this case is the amount of heat required for heating of the battery 55, and the required heat amount TGQhtr2 becomes larger as the battery temperature TB is lower than the prescribed value T1 and the difference is larger.
For example, when the required heat amount for heating the battery 55 is 2kW, the required heat amount TGQhtr2 of the heat medium heater 66 is 2kW. For example, the required heat amount TGQhtr2 (the amount of heat required to heat the battery 55) may be calculated by PI, PID calculation, or the like based on the deviation e between a predetermined value (for example, the central value) and the battery temperature TB within an appropriate temperature range of the battery 55.
Next, the air conditioning controller 32 proceeds to step S8, operates the circulation pump 62 of the heat medium circulation circuit 61, energizes the heat medium heater 66 to generate the required heat amount TGQhtr2, and sets the inlet of the flow switching device 60 to only one outlet, thereby setting the 1 st heat medium circulation mode described above. This is the vehicle-mounted device heating mode. Even in the vehicle-mounted device heating mode, the air conditioning controller 32 completely closes the auxiliary expansion valve 73 so that the refrigerant does not flow through the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64.
In this vehicle-mounted device heating mode, as shown in fig. 4, the heat medium heated by the heat medium heater 66 is circulated to the battery 55 by the circulation pump 62 through the flow switching device 60 and the heat medium flow path 64A of the refrigerant-heat medium heat exchanger 64 in this order, and therefore the battery 55 is heated by the heat medium, and the battery temperature TB is increased to the appropriate temperature range. In addition, when TB = T1, TGQhtr2 becomes 0, but in this case, the process proceeds from step S1 to step S9.
(10-3) 1 st vehicle-mounted device heating/auxiliary heating mode
Next, when the heating capacity of the radiator 4 is insufficient and auxiliary heating is required in step S2, the air conditioning controller 32 proceeds to step S3. That is, in the case where the heating of the battery 55 is required and the heating capacity of the radiator 4 is insufficient, the air conditioning controller 32 proceeds to step S3 and calculates the required heat amount TGQhtr3 of the heat medium heater 66. The required heat amount TGQhtr3 in this case is calculated by, for example, the following formula (VIII).
TGQhtr3＝TGQhtr2+TGQhtr1··(VIII)
According to the above equation (VIII), the sum of the amount of heat required for heating of the battery 55 (TGQhtr 2) and the shortage of the heating capacity of the heat sink 4 (TGQhtr 1) is set as the required amount of heat TGQhtr3 in this case. For example, in the case where the heat amount required for heating of the battery 55 (required heat amount TGQhtr 2) is 2kW and the insufficient amount of the heating capacity of the heat sink 4 (required heat amount TGQhtr 1) is 1kW, the required heat amount TGQhtr3 is 3kW. On the other hand, in the case where the shortage of the heating capacity of the radiator 4 is large, and the amount of heat required for heating of the battery 55 (required heat amount TGQhtr 2) is 2kW, and the shortage of the heating capacity of the radiator 4 (required heat amount TGQhtr 1) is 3kW, the required heat amount TGQhtr3 is increased to 5kW.
Next, the air conditioning controller 32 proceeds to step S4, and determines whether or not the inlet heat medium temperature Twin detected by the heat medium inlet temperature sensor 78 is higher than a predetermined permissible value T2. In the embodiment, the allowable value T2 is set to a predetermined value T3 (T2 = T3) which is an upper limit of the appropriate temperature range of the battery 55. The reason for this is that, when the inlet heat medium temperature Twin flowing into the cell 55 exceeds the upper limit of the appropriate temperature range of the cell 55, there is a risk of deterioration of the cell 55 located in the inflow portion of the heat medium in particular.
In addition, the term "<" "in step S4 of the flowchart of the embodiment means that the inlet heat medium temperature Twin is higher than the allowable value T2 and the difference is equal to or larger than a corresponding value, but this includes a case where the inlet heat medium temperature Twin is higher than the allowable value T2, and in addition, T2 < Twin can be simply used for judgment.
In the case where the inlet heat medium temperature Twin is equal to or less than the allowable value T2 in step S4, the control controller 32 proceeds to step S6. That is, when the battery 55 needs to be heated and the heating capacity of the radiator 4 is insufficient, and when the temperature of the heat medium flowing into the battery 55 (the inlet heat medium temperature Twin) is equal to or lower than the allowable value T2, the process proceeds to step S6.
In step S6, the air conditioning controller 32 sets the 1 st heat medium circulation mode by operating the circulation pump 62 of the heat medium circulation circuit 61, starting energization to cause the heat medium heater 66 to generate the required heat amount TGQhtr3, and causing the inlet of the flow switching device 60 to communicate with only one outlet. The air conditioning controller 32 opens the electromagnetic valve 22 and also opens the auxiliary expansion valve 73 to control the valve opening degree.
As a result, as described above, a part of the refrigerant that has been separated from the radiator 4 is branched off on the refrigerant upstream side of the outdoor expansion valve 6, flows into the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64 as shown by the white arrows in fig. 5, evaporates, and absorbs heat from the heat medium flowing through the heat medium flow path 64A. That is, the heat medium flowing into the battery 55 through the flow switching device 60 is cooled. This is the 1 st vehicle-mounted device heating/auxiliary heating mode.
In the 1 st vehicle-mounted device heating/auxiliary heating mode, as shown in fig. 5, the heat medium heated by the heat medium heater 66 is circulated by the circulation pump 62 to the battery 55 through the flow switching device 60 and the heat medium flow path 64A of the refrigerant-heat medium heat exchanger 64 in this order. The heat medium is cooled by the refrigerant while passing through the heat medium flow path 64A, and therefore, the cooled heat medium flows into the battery 55.
Further, the heat (a part of the heat generation of the heat medium heater 66) extracted from the heat medium by the refrigerant-heat medium heat exchanger 64 is sent to the radiator 4 through the refrigerant, whereby heating assistance in the vehicle compartment is performed. For example, the air conditioning controller 32 adjusts the amount of heat extracted from the heat medium by the refrigerant-heat medium heat exchanger 64 by controlling the valve opening degree of the auxiliary expansion valve 73 based on the inlet heat medium temperature Twin detected by the heat medium inlet temperature sensor 78 so that the inlet heat medium temperature Twin is not higher than the allowable value T2 and both the heating of the battery 55 and the heating assistance are compatible. Thereby, battery temperature TB rises to the appropriate temperature range.
However, if there is an upper limit to the amount of heat that can be extracted by the refrigerant-heat medium heat exchanger 64, and 1kW is used in the embodiment, when the insufficient heating capacity of the radiator 4 (the required heat amount TGQhtr 1) is 1kW or less as described above, the 1 st vehicle-mounted device heating/auxiliary heating mode is continued until the inlet heat medium temperature Twin also converges to the allowable value T2 or less, the battery temperature TB reaches the predetermined value T1, and the process proceeds to step S9.
(10-4) 2 nd vehicle-mounted device heating/auxiliary heating mode
On the other hand, when the shortage of the heating capacity of the radiator 4 is large, for example, when the required heat amount (required heat amount TGQhtr 2) for heating the battery 55 is 2kW and the shortage of the heating capacity of the radiator 4 (required heat amount TGQhtr 1) is 3kW as described above, the heat medium heater 66 performs energization control so as to generate the required heat amount TGQhtr3 of 5kW.
If such a large amount of heat generation is generated by the heat medium heater 66, the cooling action exerted by the refrigerant becomes insufficient even if the refrigerant-heat medium heat exchanger 64 extracts heat from the heat medium to the limit, and the inlet heat medium temperature Twin rises more than necessary. This state will be described with reference to fig. 8. In fig. 8, the solid line indicates the amount of heat generation of the heat medium heater 66, and the broken line indicates the variation in the inlet heat medium temperature Twin.
The process proceeds from the start (time t 0) to step S1, step S2, and step S3, and the increase in the heat generation amount of the heat medium heater 66 after the first vehicle-mounted device heating/auxiliary heating mode is started in step S6, and then the control is performed by the required heat amount TGQhtr3. The inlet heat medium temperature Twin also rises and reaches the allowable value T2 at time T1, but if the cooling action of the refrigerant by the auxiliary expansion valve 73 reaches the limit, the inlet heat medium temperature Twin further rises as shown by L2 in the drawing, and thus the cells of the battery 55, particularly the cells located at the inflow portion of the heat medium, are excessively heated and deteriorated.
Therefore, in the case where the inlet heat medium temperature Twin is higher than the allowable value T2 in step S4, the air conditioning controller 32 proceeds to step S5. In step S5, the air conditioning controller 32 operates the circulation pump 62 of the heat medium circulation circuit 61 to cause the heat medium heater 66 to generate the required heat amount TGQhtr3, but the 2 nd heat medium circulation mode is set by causing the inlet and the two outlets of the flow switching device 60 to communicate with each other. The air conditioning controller 32 opens the electromagnetic valve 22 and also opens the auxiliary expansion valve 73 to control the valve opening degree.
As a result, as described above, a part of the refrigerant that has exited from the radiator 4 is branched on the refrigerant upstream side of the outdoor expansion valve 6, flows into the refrigerant passage 64B of the refrigerant-heat medium heat exchanger 64 as indicated by the white arrows in fig. 6, evaporates, and absorbs heat from the heat medium flowing through the heat medium passage 64A. That is, the heat medium flowing into the battery 55 through the flow switching device 60 is cooled. This is the 2 nd vehicle-mounted device heating/auxiliary heating mode.
In the 2 nd vehicle-mounted device heating/auxiliary heating mode, as shown in fig. 6, the heat medium heated by the heat medium heater 66 is circulated by the circulation pump 62 among the heat medium heater 66, the refrigerant-heat medium heat exchanger 64, and the battery 55, and between the heat medium heater 66 and the heater core 23, and therefore, the battery 55 is heated by heat generation of the heat medium heater 66, and the air flowing through the air flow path 3 is heated by the heater core 23 to perform heating assistance.
In addition, since the heat medium is cooled by the refrigerant while passing through the heat medium flow path 64A, the cooled heat medium flows into the battery 55. The heat extracted from the heat medium by the refrigerant-heat medium heat exchanger 64 is transferred to the radiator 4 by the refrigerant, whereby heating assistance in the vehicle compartment can be performed.
That is, as shown in this example, when the amount of heat required for heating the battery 55 (the required heat amount TGQhtr 2) is 2kW and the shortage of the heating capacity of the radiator 4 (the required heat amount TGQhtr 1) is 3kW, the amount of heat taken by the refrigerant in the refrigerant-heat medium heat exchanger 64 is 1kW or less as the upper limit, and the amount of heat radiated by the heater 23 is 2kW, and the sum of these amounts of heat becomes the amount of heat for heating assistance. Thus, the capacity map achieves both heating of the battery 55 and heating assistance in the vehicle compartment, and the cooling action of the refrigerant in the refrigerant-heat medium heat exchanger 64 is not insufficient, and as shown by L1 in fig. 8, it is possible to prevent the inlet heat medium temperature Twin from becoming higher than the allowable value T2, and therefore, deterioration of the battery 55 due to the inflow of the heat medium having an abnormally high temperature is eliminated.
In the case of the 2 nd vehicle-mounted device heating/auxiliary heating mode, the circulation amount of the heat medium by the circulation pump 62 and the heating capacity of the air in the heater core 23 are set in the embodiment such that the inlet heat medium temperature Twin is not higher than the allowable value T2 even when the heat generation amount of the heat medium heater 66 is maximized.
In addition, a predetermined hysteresis α is set in the determination in step S4 (α is a positive temperature value), and after the process advances from step S4 to step S5, the air conditioning controller 32 does not advance from step S4 to step S6 until, for example, the inlet heat medium temperature Twin decreases to the allowable value T2- α (Twin ≦ T2- α).
As described above in detail, according to the present invention, the flow path is switched by the flow path switching device 60 to the 1 st heat medium circulation mode in which the heat medium in the heat medium heater 66 flows through the battery 55 without flowing through the heater core 23, the 2 nd heat medium circulation mode in which the heat medium flows through both the battery 55 and the heater core 23, and the 3 rd heat medium circulation mode in which the heat medium flows through the heater core 23 without flowing through the battery 55, so that the battery 55 can be heated by executing the 1 st heat medium circulation mode when it is not necessary to heat the vehicle interior by the heater core 23 and the battery 55 needs to be heated, and the charge/discharge performance of the battery 55 can be maintained.
In addition, when only the interior of the vehicle needs to be heated, the interior of the vehicle can be heated by the heat generated by the heat medium heater 66 by executing the 3 rd heat medium circulation mode. That is, the heating in the vehicle compartment can be performed by the heat medium heater 66 for heating the battery 55, and the space saving and cost reduction due to the reduction of the heating device can be achieved.
In particular, according to the present invention, when both heating of the battery 55 and heating of the vehicle interior are required, by executing the 2 nd heat medium circulation mode, both heating of the battery 55 and heating of the vehicle interior by the heater core 23 can be realized by heat generation of the heat medium heater 66, and performance maintenance of the battery 55 and heating of the vehicle interior can be flexibly achieved by the heat medium heater 66 for heating the battery 55.
In the embodiment, the heat pump device HP having the compressor 2, the radiator 4, the outdoor heat exchanger 7, and the refrigerant-heat medium heat exchanger 64 is provided, and therefore, in the refrigerant-heat medium heat exchanger 64, heat can be extracted from the heat medium flowing through the heat medium circulation circuit 61 to the refrigerant, and heat generated by the heat medium heater 66 is transferred to the radiator 4 to assist heating in the vehicle compartment.
Further, since the heat medium is cooled by exchanging heat with the refrigerant in the refrigerant-heat medium heat exchanger 64, the temperature of the heat medium flowing through the battery 55 can be reduced to the range allowed in the battery 55 even when the amount of heat generation of the heat medium heater 66 is increased in the 2 nd heat medium circulation mode. This prevents the temperature of the heat medium flowing through the battery 55 from being higher than an allowable value, and also allows the heater core 23 to perform more effective heating assistance, and thus allows the vehicle interior to be more comfortably air-conditioned, thereby allowing the heating operation range to be expanded. Further, as in the embodiment, even if the circulation pump 62 is driven at a constant speed, control of the heat medium circulation circuit 61 can be simplified, such as control without trouble.
In particular, in the present embodiment, the refrigerant-heat medium heat exchanger 64 is disposed between the flow path switching device 60 and the battery 55 so that the heat medium flowing into the battery 55 exchanges heat with the refrigerant, and therefore, heat can be extracted from the heat medium flowing into the battery 55, and the temperature of the heat medium flowing into the battery 55 can be accurately lowered to a range allowed in the battery 55. Since the refrigerant absorbs heat from the heat medium branched to the battery 55 side by the flow switching device 60, the heating capacity by the heater core 23 can be ensured.
In addition, in the embodiment, the auxiliary expansion valve 73 for controlling the inflow of the refrigerant into the refrigerant-heat medium heat exchanger 64 is provided, and therefore, in the vehicle-mounted device heating mode in which the auxiliary heating mode in which the refrigerant-heat medium heat exchanger 64 does not need to absorb heat from the heat medium and the temperature of the heat medium does not need to be lowered, the refrigerant does not flow through the refrigerant-heat medium heat exchanger 64 through the auxiliary expansion valve 73, and the load on the compressor 2 can be reduced.
In particular, in the embodiment, in the case where the battery 55 needs to be heated and the heating capacity of the radiator 4 is not insufficient, the air conditioning controller 32 uses the auxiliary expansion valve 73 to block the inflow of the refrigerant to the refrigerant-heat medium heat exchanger 64 and executes the vehicle-mounted device heating mode in which the heat medium circulation circuit 61 is set to the 1 st heat medium circulation mode, so when the heating of the battery 55 is needed and the heating capacity of the radiator 4 is not insufficient, the heating of the battery 55 by the heat medium heater 66 can be efficiently performed without flowing the refrigerant through the refrigerant-heat medium heat exchanger 64.
On the other hand, when the battery 55 needs to be heated and the heating capacity of the radiator 4 is insufficient, the air conditioning controller 32 causes the refrigerant to flow through the refrigerant-heat medium heat exchanger 64 via the auxiliary expansion valve 73 and executes the 1 st vehicle-mounted device heating/auxiliary heating mode in which the heat medium circulation circuit 61 is set to the 1 st heat medium circulation mode, so that both heating of the battery 55 and heating assistance in the vehicle compartment by transferring heat absorbed by the refrigerant-heat medium heat exchanger 64 to the radiator 4 can be achieved.
Here, when the temperature Twin of the heat medium flowing into the battery 55 in the 1 st vehicle-mounted device heating/auxiliary heating mode is higher than the predetermined allowable value T2, the air-conditioning controller 32 causes the refrigerant to flow through the refrigerant-heat medium heat exchanger 64 via the auxiliary expansion valve 73, and executes the 2 nd vehicle-mounted device heating/auxiliary heating mode in which the heat medium circulation circuit 61 is set to the 2 nd heat medium circulation mode, so that both the heating of the battery 55 and the heating assistance by the heater core 23 can be realized.
In particular, in this case, heating assistance in the vehicle compartment is performed by simultaneously delivering the heat absorbed by the refrigerant-heat medium heat exchanger 64 to the radiator 4 via the refrigerant, and the heat medium flowing into the battery 55 is cooled, so even if the amount of heat generated by the heat medium heater 66 is increased to increase the heating capacity of the heater core 23, the temperature of the heat medium flowing into the battery 55 can be appropriately maintained at an allowable value, and deterioration of the battery 55 can be prevented.
In addition, when the battery 55 does not need to be heated and the heating capacity of the radiator 4 is insufficient, the air conditioning control 32 prevents the refrigerant from flowing into the refrigerant-heat medium heat exchanger by the auxiliary expansion valve 73 and executes the auxiliary heating mode in which the heat medium circulation circuit 61 is set to the 3 rd heat medium circulation mode, and therefore, the heat medium heater 66 for heating the battery 55 is used to efficiently assist the heating in the vehicle compartment.
In the present embodiment, when the battery temperature TB or the temperature Twout of the heat medium passing through the battery 55 is lower than the predetermined value T1, the air conditioning controller 32 determines that the battery 55 needs to be heated, and when the heating temperature TH, which is the temperature of the air on the leeward side of the radiator 4, is lower than the target outlet air temperature TAO or the target heater temperature TCO, the air conditioning controller 32 determines that the heating capability of the radiator 4 is insufficient, and thus the modes (the auxiliary heating mode, the vehicle-mounted device heating mode, the 1 st vehicle-mounted device heating/auxiliary heating mode, and the 2 nd vehicle-mounted device heating/auxiliary heating mode) can be smoothly realized.
Further, as in the embodiment, the air conditioning controller 32 calculates the required heat amounts (TGQhtr 1 to 3) of the heat medium heaters 66 based on the heat amount required for heating the battery 55 and the heat amount corresponding to the insufficient heating capacity of the radiator 4, and therefore, by using the heat medium heater 66 for heating the battery 55, it is possible to accurately satisfy both the heating of the battery 55 and the heating assistance in the vehicle compartment.
In the embodiment, the required heat amount TGQhtr3 of the heat medium heater 66 is calculated in step S7 of fig. 7, and the 1 st vehicle-mounted device heating/auxiliary heating mode and the 2 nd vehicle-mounted device heating/auxiliary heating mode are switched in step S4 depending on whether or not the inlet heat medium temperature Twin is higher than the allowable value T2, but not limited to this, and switching may be performed such that when the limit of heat absorption by the refrigerant-heat medium heat exchanger 64 is 1kW as in the embodiment, the 1 st vehicle-mounted device heating/auxiliary heating mode is executed when the battery 55 needs to be heated and the heating capability of the radiator 4 is insufficient, and when the required heat amount TGQhtr1 for heating assistance is 1kW or less, the 2 nd vehicle-mounted device heating/auxiliary heating mode is executed when TGQhtr1 is larger than 1kW, that is, when the heating capability of the radiator 4 is insufficient, that is the first vehicle-mounted device heating/auxiliary heating mode.
In the embodiment, the battery 55 is used as the vehicle-mounted device, but the invention is not limited to this, and is also effective in the invention other than the invention according to claim 12, such as a motor for traveling, an inverter device for driving the motor, and the like. The invention of claim 1 is also effective for a vehicle air conditioner that heats the vehicle interior only by the heater core 23 without providing the heat pump device HP.
The configuration of the air conditioning controller 32 and the configurations of the heat pump device HP and the heat medium circuit 61 of the vehicle air conditioning device 1 described in the embodiments are not limited to these, and it goes without saying that modifications are possible within a scope not departing from the gist of the present invention.
Description of the reference symbols
1 air conditioner for vehicle
2 compressor
4 radiator
6 outdoor expansion valve
7 outdoor heat exchanger
23 Heater core
32 controller of air conditioner (control device)
55 Battery (vehicle carrying equipment)
60 flow path switching device
61 heating medium circulation loop
62 circulating pump (circulating device)
64 refrigerant-heat medium heat exchanger
66 heating medium heater (heating device)
73 auxiliary expansion valve (flow path control device)
76 cell temperature sensor
77 heat medium outlet temperature sensor
78 heat medium inlet temperature sensor.

Claims (12)

1. An air-conditioning device for a vehicle,
an air conditioning device for a vehicle, having a heater core for heating air supplied into a vehicle compartment and performing air conditioning in the vehicle compartment,
a heat medium circulation circuit for circulating the heat medium between the vehicle-mounted device and the heater core,
the heat medium circulation circuit includes:
a circulation device for circulating the heating medium;
a heating device for heating the heating medium; and
a flow path switching device for switching a flow path to a state in which the heat medium passing through the heating device flows through the vehicle-mounted device without flowing through the heater core, a state in which the heat medium flows through both the vehicle-mounted device and the heater core, and a state in which the heat medium flows through the heater core without flowing through the vehicle-mounted device.
2. An air conditioning device for a vehicle according to claim 1, comprising:
a compressor for compressing a refrigerant;
a radiator for radiating heat from the refrigerant to heat air supplied into the vehicle compartment;
an outdoor heat exchanger disposed outside the vehicle compartment; and
a refrigerant-to-heat medium heat exchanger for heat exchanging the refrigerant with the heat medium, thereby extracting heat from the heat medium to the refrigerant.
3. The air conditioning device for a vehicle according to claim 2,
the refrigerant-heat medium heat exchanger is disposed between the flow switching device and the vehicle-mounted device, and exchanges heat between the heat medium flowing into the vehicle-mounted device and the refrigerant.
4. An air conditioning device for a vehicle according to claim 3,
the heat exchanger includes a flow path control device for controlling the inflow of the refrigerant into the refrigerant-heat medium heat exchanger.
5. An air conditioning device for a vehicle according to claim 4,
comprises a control device for controlling the heat medium circulation loop,
the control device comprises:
a 1 st heat medium circulation mode in which the heating device is caused to generate heat and the heat medium heated by the heating device is caused to flow through the vehicle-mounted device without flowing through the heater core by the flow path switching device;
a 2 nd heat medium circulation mode in which the heating device is caused to generate heat and the heat medium heated by the heating device is caused to flow through both the vehicle-mounted device and the heater core by the flow path switching device; and
a 3 rd heat medium circulation mode in which the heating device is caused to generate heat, and the heat medium heated by the heating device is caused to flow through the heater core without flowing through the vehicle-mounted device by the flow path switching device.
6. An air conditioning device for a vehicle according to claim 5,
the controller may be configured to perform a vehicle-mounted device heating mode in which the heat medium circulation circuit is set to the 1 st heat medium circulation mode while preventing the refrigerant from flowing into the refrigerant-heat medium heat exchanger by the flow path controller, when the vehicle-mounted device needs to be heated and the heating capacity of the radiator is not insufficient.
7. The vehicular air-conditioning apparatus according to claim 5 or 6,
the controller causes the refrigerant to flow through the refrigerant-heat medium heat exchanger by the flow path controller and executes a 1 st vehicle-mounted device heating/auxiliary heating mode in which the heat medium circulation circuit is set to the 1 st heat medium circulation mode, when the vehicle-mounted device needs to be heated and the heating capacity of the radiator is insufficient.
8. An air conditioning device for a vehicle according to claim 7,
the controller causes the flow path controller to flow the refrigerant through the refrigerant-heat medium heat exchanger and to execute a 2 nd vehicle-mounted device heating/auxiliary heating mode in which the heat medium circulation circuit is set to the 2 nd heat medium circulation mode, when a temperature Twin of the heat medium flowing into the vehicle-mounted device in the 1 st vehicle-mounted device heating/auxiliary heating mode is higher than a predetermined permissible value T2 or even when the heating capacity of the radiator is insufficient in the 1 st vehicle-mounted device heating/auxiliary heating mode.
9. The vehicular air-conditioning apparatus according to any one of claims 5 to 8,
the controller may be configured to execute an auxiliary heating mode in which the heat medium circulation circuit is set to the 3 rd heat medium circulation mode while preventing the refrigerant from flowing into the refrigerant-heat medium heat exchanger by the flow path controller, when the vehicle-mounted device does not need to be heated and the heating capacity of the radiator is insufficient.
10. The vehicular air-conditioning apparatus according to any one of claims 6 to 9,
the control device determines that the vehicle-mounted device needs to be heated when the temperature TB of the vehicle-mounted device or the temperature Tbout of the heat medium passing through the vehicle-mounted device is lower than a predetermined value T1,
when the heating temperature TH, which is the temperature of the air on the leeward side of the radiator, is lower than the target outlet air temperature TAO, which is the target value of the temperature of the air blown out into the vehicle compartment, or the target heater temperature TCO, which is the target value of the heating temperature TH derived from the target outlet air temperature TAO, it is determined that the heating capacity of the radiator is insufficient.
11. The vehicular air-conditioning apparatus according to any one of claims 6 to 10,
the control device calculates the required heat amount of the heating device based on the required heat amount of the vehicle-mounted equipment for heating and/or the heat amount corresponding to the insufficient heating capacity of the radiator.
12. The vehicular air-conditioning apparatus according to any one of claims 1 to 11,
the vehicle-mounted device is the heat medium circulation circuit or a battery that supplies power to the heat medium circulation circuit and the compressor.
CN202180021060.XA 2020-03-26 2021-02-19 Air conditioner for vehicle Pending CN115551726A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2020055752A JP2021154814A (en) 2020-03-26 2020-03-26 Air conditioner for vehicle
JP2020-055752 2020-03-26
PCT/JP2021/006338 WO2021192760A1 (en) 2020-03-26 2021-02-19 Vehicle air conditioner

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WO (1) WO2021192760A1 (en)

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Publication number Priority date Publication date Assignee Title
JP5440426B2 (en) 2010-07-09 2014-03-12 株式会社日本自動車部品総合研究所 Temperature control system for vehicles
JP5668700B2 (en) 2012-01-25 2015-02-12 株式会社デンソー Vehicle air conditioning system
JP6125312B2 (en) 2013-04-26 2017-05-10 サンデンホールディングス株式会社 Air conditioner for vehicles
CN107031347B (en) * 2016-01-13 2019-08-09 翰昂汽车零部件有限公司 In-vehicle air conditioner
JP6925288B2 (en) * 2018-01-30 2021-08-25 サンデン・オートモーティブクライメイトシステム株式会社 Vehicle air conditioner
CN110116600A (en) * 2018-02-05 2019-08-13 长城汽车股份有限公司 The heat management system and vehicle of vehicle
JP7027945B2 (en) * 2018-02-22 2022-03-02 株式会社デンソー Vehicle temperature control device
JP6692845B2 (en) * 2018-03-07 2020-05-13 本田技研工業株式会社 Vehicle heat circulation system
JP7164986B2 (en) * 2018-07-31 2022-11-02 サンデン株式会社 Vehicle air conditioner

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