CN-122029064-A - Air conditioner for vehicle

Abstract

The invention provides an air conditioner for a vehicle, which can inhibit the consumption of components. The control device (200) is provided, and the control device (200) can perform control in a hot gas heating mode in which a part of the refrigerant passing through the compressor (11) flows through the heater core (12) and the remaining refrigerant flows through the bypass path, and when the hot gas heating mode is completed, the control device (200) performs a pressure reduction process in which the pressure on the low-pressure side of the refrigerant circuit (10) is reduced. Accordingly, the compressor (11) can be stopped so that the pressure on the low-pressure side of the refrigerant circuit (10) does not exceed the upper limit, and therefore, the consumption of components of the air conditioner (1) for vehicles, such as the compressor (11) and the accumulator (15), can be suppressed.

Inventors

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

Assignees

• 三电株式会社

Dates

Publication Date

20260512

Application Date

20240913

Priority Date

20231020

Claims (6)

1. 1. An air conditioner for a vehicle, characterized in that, The air conditioner for a vehicle includes: A refrigerant circuit including a compressor, a heater core for heating air supplied into a vehicle interior, a pressure reducing device, a low-temperature side heat exchanger for absorbing heat of a heat medium absorbed from an in-vehicle heat generating device by a refrigerant, and an accumulator configured to circulate the refrigerant, the refrigerant circuit including a bypass path for bypassing the heater core and flowing the refrigerant passing through the compressor to a suction side of the compressor, and A control device capable of controlling in a hot gas heating mode in which a part of the refrigerant passing through the compressor flows through the heater core and the remaining refrigerant flows through the bypass passage, The control device executes a pressure reduction process of reducing the pressure on the low-pressure side of the refrigerant circuit when the hot-gas heating mode is completed.
2. 2. The vehicular air conditioner according to claim 1, wherein, The control device executes, as the pressure reduction process, a process of gradually reducing the pressure on the low-pressure side of the refrigerant circuit by the pressure reduction device and gradually reducing the rotation speed of the compressor.
3. 3. The vehicular air conditioner according to claim 2, wherein, The control device executes, as the pressure reduction process, a process of reducing the pressure on the low-pressure side of the refrigerant circuit by the pressure reduction device after gradually reducing the rotation speed of the compressor.
4. 4. The vehicular air conditioner according to claim 2, wherein, The control device executes, as the pressure reduction process, a process of radiating heat of the refrigerant to the heat medium in the low-temperature side heat exchanger.
5. 5. The vehicular air conditioner according to claim 1, wherein, The air conditioning device for a vehicle is provided with an air conditioning unit which houses the heater core, and comprises an inside/outside air switching device which adjusts the ratio of the air inside the vehicle to the air outside the vehicle, which is introduced into the air flow path of the air which exchanges heat in the heater core, and a blower which blows the air which exchanges heat in the heater core into the vehicle, The control device performs a process of increasing the blowing amount of the blower as the pressure reduction process.
6. 6. The vehicular air conditioner according to claim 1, wherein, The air conditioning device for a vehicle is provided with an air conditioning unit which houses the heater core, and comprises an inside/outside air switching device which adjusts the ratio of the air inside the vehicle to the air outside the vehicle, which is introduced into the air flow path of the air which exchanges heat in the heater core, and a blower which blows the air which exchanges heat in the heater core into the vehicle, The control device executes, as the pressure reduction process, a process of adjusting the introduction ratio by the inside-outside air switching device so as to increase the introduction ratio of the vehicle outside air.

Description

Air conditioner for vehicle Technical Field The present invention relates to an air conditioner for a vehicle. Background As an air conditioner for an electric vehicle (EV: ELECTRIC VEHICLE) having no heat source of a combustion system such as an engine and a vehicle having a small amount of heat of the heat source of the combustion system, 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, it is difficult to absorb heat from the outside air, and therefore the heating efficiency is lowered. For this reason, for example, patent document 1 discloses a heating system called a hot air heating mode in which, when the outside air temperature is extremely low (for example, -20 degrees to-30 degrees), a part of the refrigerant passing through the compressor is caused to flow through the heater core and the remaining refrigerant is caused to flow through the bypass path. Prior art literature Patent literature Patent document 1 International publication No. 2022/201688 Disclosure of Invention Problems to be solved by the invention The present invention provides a vehicle air conditioner capable of suppressing the consumption of components. Means for solving the problems According to one aspect of the present invention, an air conditioning apparatus for a vehicle includes a refrigerant circuit configured to circulate a refrigerant, a compressor, a heater core that heats air supplied into a vehicle interior, a pressure reducing device, a low-temperature side heat exchanger that causes the refrigerant to absorb heat of a heat medium that has been absorbed from an on-vehicle heat generating device, and an accumulator, and includes a bypass path that causes the refrigerant that has passed through the compressor to bypass the heater core and flow into a suction side of the compressor, and a control device that can perform control in a hot air heating mode in which a part of the refrigerant that has passed through the compressor flows through the heater core and causes the remaining refrigerant to flow through the bypass path, and that performs pressure reduction processing that reduces a pressure on a low-pressure side of the refrigerant circuit when the hot air heating mode is completed. Effects of the invention According to the present invention, it is possible to provide a vehicle air conditioner capable of suppressing consumption of components. Drawings Fig. 1 is a schematic diagram showing an exemplary configuration of a vehicle air conditioner, and is a diagram showing an example of a state of the vehicle air conditioner when hot air heating is performed. Fig. 2 is a diagram showing an example of a block diagram of a control device of the vehicle air conditioner. Fig. 3 is a diagram showing an example of a flowchart showing a procedure of processing at the end of the hot air heating mode of the air conditioner for a vehicle. Fig. 4 is an explanatory diagram showing transition of each element when the pressure reduction process is performed at the end of the hot air heating mode of the air conditioner for a vehicle. Fig. 5 is an enlarged view of a portion of the suction side of the compressor of fig. 4 where the pressure is reduced. Fig. 6 is a diagram showing an example of a flowchart showing a procedure of processing at the end of the hot air heating mode of the air conditioner for a vehicle. Fig. 7 is an explanatory diagram showing transition of each element when the pressure reduction process is performed at the end of the hot air heating mode of the air conditioner for a vehicle. Fig. 8 is a diagram showing an example of a flowchart showing a procedure of processing at the end of the hot air heating mode of the air conditioner for a vehicle. Fig. 9 is a diagram showing an example of a flowchart showing a procedure of processing at the end of the hot air heating mode of the air conditioner for a vehicle. Fig. 10 is a diagram showing an example of a flowchart showing a procedure of the process in the hot air heating mode of the air conditioner for a vehicle. Fig. 11 is a diagram showing an example of a flowchart showing a procedure of the process in the hot air heating mode of the air conditioner for a vehicle. Detailed Description [ Structure of air conditioner for vehicle ] < Outline of air conditioner for vehicle > The air conditioner for a vehicle according to the present embodiment is configured to be capable of suppressing the consumption of components. The vehicle air conditioner according to the present embodiment is configured to avoid occurrence of vibration and noise. The vehicle air conditioner according to the present embodiment is configured to suppress occurrence of vibration and noise due to resonance or the like. Fig. 1 is a schematic explanatory view showing an exemplary configuration of an air conditioner 1 for a vehicle according to the present embodiment. The vehicle air conditioner 1 includes a ref