CN-121986031-A - Air conditioner for vehicle

Abstract

Provided is an air conditioner for a vehicle having excellent quick-heating performance. The vehicle air conditioner (1) is provided with a refrigerant circuit (10), wherein the refrigerant circuit (10) comprises a compressor (11), a heater core (12) configured to heat air supplied into a vehicle interior, a pressure reducing device (13), and a low-temperature side heat exchanger (14) configured to exchange heat between a refrigerant and a heat medium that exchanges heat with a vehicle-mounted heating device. A control device (200) restricts the inflow of refrigerant to a low-temperature side heat exchanger (14) when the temperature of a heat medium flowing through the low-temperature side heat exchanger (14) does not satisfy a predetermined condition in a hot-gas heating mode in which a part of refrigerant passing through a compressor (11) is caused to flow to a heater core (12) and the remaining refrigerant is caused to flow to a bypass path.

Inventors

• TODOROKI HIROKI
• Dong Gongwushi
• ZHANG HONGMING
• Shanjing is high
• TOMARU TAKAHIRO
• FENG XINGWEN

Assignees

• 三电株式会社

Dates

Publication Date

20260505

Application Date

20240807

Priority Date

20230920

Claims (8)

1. 1. An air conditioning apparatus for a vehicle, comprising: The refrigerant circuit includes a compressor, a heater core configured to heat air supplied into a vehicle interior, a pressure reducing device, and a low-temperature side heat exchanger configured to exchange heat between a heat medium that exchanges heat with an on-vehicle heat generating device and a refrigerant, and includes a path configured to circulate the refrigerant among the compressor, the heater core, the pressure reducing device, and the low-temperature side heat exchanger, and a bypass path through which the refrigerant passing through the compressor bypasses the heater core and flows into a suction side of the compressor; A heat medium circuit configured to circulate the heat medium through the in-vehicle heating device and the low-temperature side heat exchanger, and A control device configured to switch and control the refrigerant circuit, and to control the flow of a part of the refrigerant passing through the compressor to the heater core and the flow of the remaining refrigerant to the bypass path in a hot gas heating mode, The control device restricts the inflow of the refrigerant into the low-temperature side heat exchanger when the temperature of the heat medium flowing through the low-temperature side heat exchanger does not satisfy a predetermined condition in the hot gas heating mode.
2. 2. The vehicular air-conditioning apparatus according to claim 1, wherein, The control device restricts the inflow of the refrigerant into the low-temperature side heat exchanger until the temperature of the heat medium flowing through the low-temperature side heat exchanger exceeds a predetermined reference temperature when the hot-gas heating mode is started.
3. 3. The air conditioner for vehicle according to claim 1 or 2, wherein, The heat medium circuit further includes a heat medium heating device configured to heat the heat medium.
4. 4. The air conditioner for vehicle according to claim 1 or 2, wherein, The heat medium circuit further includes a circulation pump configured to circulate the heat medium, The control device is configured to control the operation or stop of the circulation pump based on the temperature of the heating medium in the hot-air heating mode.
5. 5. The vehicular air-conditioning apparatus according to claim 1, wherein, The control device controls the inflow of the refrigerant into the low-temperature side heat exchanger when the temperature of the heat medium flowing through the low-temperature side heat exchanger does not satisfy a predetermined condition, When the temperature of the heat medium flowing through the low temperature side heat exchanger does not exceed a predetermined reference temperature, When the temperature of the heat carrier flowing through the low temperature side heat exchanger is not higher than the outside air temperature by a predetermined temperature, When the temperature difference between the temperature of the heat medium at the outlet side and the temperature of the heat medium at the inlet side of the low-temperature side heat exchanger exceeds a predetermined value, or When the temperature of the heat medium flowing through the low-temperature side heat exchanger does not exceed the temperature of the refrigerant flowing through the low-temperature side heat exchanger.
6. 6. The air conditioner for vehicle according to claim 1 or 2, wherein, The control device causes all the refrigerant passing through the compressor to flow to the bypass path when the temperature of the heat medium flowing through the low-temperature side heat exchanger does not satisfy a predetermined condition.
7. 7. The air conditioner for vehicle according to claim 1 or 2, wherein, The refrigerant circuit includes a cooler core disposed downstream of the pressure reducing device and configured to exchange heat with air supplied into the vehicle interior, The control device causes at least a part of the refrigerant passing through the compressor to flow to the heater core, the pressure reducing device, and the cooler core when the temperature of the heat medium flowing through the low-temperature side heat exchanger does not satisfy a predetermined condition.
8. 8. The air conditioner for vehicle according to claim 1 or 2, wherein, The refrigerant circuit has a low temperature side heat exchanger bypass flow path bypassing the low temperature side heat exchanger, The control device causes at least a part of the refrigerant passing through the compressor to flow into the heater core, the pressure reducing device, and the low-temperature side heat exchanger bypass flow path when the temperature of the heat medium flowing through the low-temperature side heat exchanger does not satisfy a predetermined condition.

Description

Air conditioner for vehicle Technical Field The present invention relates to an air conditioner for a vehicle. Background As an air conditioner for a vehicle having no heat source of a combustion system such as an engine (EV: ELECTRIC VEHICLE) or a combustion system, which has a small amount of heat, an air conditioner using a heat pump is known. However, in an air conditioner using a heat pump, when the outside air temperature is extremely low, heat absorption by the outside air becomes difficult, and therefore, the heating efficiency is lowered. For this reason, for example, patent document 1 discloses a technology of adopting a heating system called a hot gas heating system for heating a heat pump compressor when the outside air temperature is extremely low. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 2023-075844 Disclosure of Invention Technical problem to be solved by the invention The invention aims to provide an air conditioner for a vehicle, which has good quick heating performance. Technical proposal adopted for solving the technical problems According to one aspect of the present invention, an air conditioning apparatus for a vehicle includes a refrigerant circuit including a compressor; a heater core configured to heat air supplied into a vehicle interior; the heat exchanger includes a compressor, a heater core, a pressure reducing device, a low-temperature side heat exchanger configured to exchange heat between a heat medium and a refrigerant in the vehicle-mounted heat generating device, and includes a path configured to circulate the refrigerant in the compressor, the heater core, the pressure reducing device, and the low-temperature side heat exchanger, and a bypass path through which the refrigerant passing through the compressor bypasses the heater core and flows into a suction side of the compressor, a heat medium circuit configured to circulate the heat medium in the vehicle-mounted heat generating device and the low-temperature side heat exchanger, and a control device configured to switch and control the refrigerant circuit so as to enable control in a hot air heating mode in which a part of the refrigerant passing through the compressor flows into the heater core and the remaining refrigerant flows into the bypass path, and the control device restricts the refrigerant from flowing into the low-temperature side heat exchanger when a temperature of the heat medium flowing through the low-temperature side heat exchanger does not satisfy a predetermined condition in the hot air heating mode. Effects of the invention According to the present invention, an air conditioner for a vehicle having excellent quick-heating performance can be provided. Drawings Fig. 1 is a diagram schematically showing a configuration example of a vehicle air conditioner according to an embodiment, and is a diagram showing an example of a state of the vehicle air conditioner when a hot air heating mode is executed. Fig. 2 is a block diagram showing an example of the configuration of a control device of the vehicle air conditioner. Fig. 3 is a flowchart showing a first example of processing related to the hot air heating mode in the vehicle air conditioner. Fig. 4 is a flowchart showing a second example of the process related to the hot air heating mode in the vehicular air conditioning apparatus. Fig. 5 is a diagram showing an outline of a structural example of an air conditioner for a vehicle, and is a diagram showing an example of one state in a second example of processing related to a hot air heating mode. Fig. 6 is a diagram showing an outline of a structural example of the air conditioner for a vehicle, and is a diagram showing an example of one state in a third example of the process related to the hot air heating mode. Fig. 7 is a flowchart showing a third example of the process related to the hot air heating mode in the vehicular air conditioning apparatus. Detailed Description [ Structure of air conditioner for vehicle ] < Summary of air conditioner for vehicle > The present embodiment relates to an air conditioner for a vehicle having a refrigerant circuit and a heat medium circuit. The vehicle air conditioner according to the present embodiment is configured to be mounted on an electric vehicle, and to improve the quick-heating performance. Fig. 1 is an explanatory diagram schematically showing a configuration example of a vehicular air conditioner 1 according to the present embodiment. The vehicle air conditioner 1 includes a refrigerant circuit 10 configured to circulate a refrigerant. The refrigerant is not limited to this, and for example, a hydrofluoroolefin (a japanese) or the like may be used. The vehicle air conditioner 1 includes a battery temperature control circuit 40 configured to circulate a heat medium for supplying a fluid such as a coolant, for example. In addition, the vehicular air conditioning apparatus 1 includes an HVAC (Heating, ventilation