Vehicle air conditioner

A technology for air conditioning and vehicles, which is applied to vehicle components, air handling equipment, transportation and packaging, etc., and can solve problems such as deterioration, damage, and poor operation

Active Publication Date: 2020-04-21
SANDEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If charge and discharge are performed in such a state, deterioration will progress, and there is a risk of eventually causing malfunction and damage

Method used

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  • Vehicle air conditioner
  • Vehicle air conditioner
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] figure 1 A configuration diagram showing a vehicle air-conditioning apparatus 1 according to an embodiment of the present invention. The vehicle to which the embodiment of the present invention is applied is an electric vehicle (EV) not equipped with an engine (internal combustion engine), and a battery (heat generating device) 75 is mounted on the vehicle, and the electric motor ( (not shown) is supplied to drive the vehicle, and the vehicle air-conditioning device 1 of the present invention is also driven by the electric power of the battery 75 .

[0038] That is, the vehicle air-conditioning apparatus 1 of the embodiment selectively executes the heating mode (second air-conditioning mode), Dehumidification and heating mode (first air conditioning mode), dehumidification cooling mode (first air conditioning mode), and cooling mode (first air conditioning mode) each air conditioning mode to perform air conditioning in the vehicle interior.

[0039] In addition, the v...

Embodiment 2

[0139] (10) Control of opening the solenoid valve 40 in the heating mode and the defrosting mode (Part 2)

[0140] In addition, in the above-mentioned embodiment, the solenoid valve 40 is opened during the execution of the heating mode and the defrosting mode (the second air conditioning mode), but the present invention is not limited to this, and may be performed during the heating mode and the defrosting mode. Basically, the solenoid valve 40 is closed during the heating mode and the defrosting mode, and the solenoid valve 40 is opened when the suction refrigerant pressure Ps of the compressor 2 becomes lower than a predetermined value Psvap after the heating mode and the defrosting mode are started (in this embodiment, control to open the solenoid valve 40). Then, when the suction refrigerant pressure Ps becomes equal to or higher than (Psvap+α), the heat pump controller 32 closes the solenoid valve 40 .

[0141] In this case, the suction refrigerant pressure Ps uses the v...

Embodiment 3

[0143] (11) Control of opening the solenoid valve 40 in the heating mode and the defrosting mode (Part 3)

[0144] In addition, since the temperature of the refrigerant and oil in the refrigerant supply pipe 72 can be considered to be the same as the temperature of the outside air Tam, the heat pump controller 32 in the heating mode and defrosting mode (second air-conditioning mode) When the difference ΔPs (=Pavap−Ps) between the suction refrigerant pressure Ps of the machine 2 and the saturation pressure Pavap of the refrigerant obtained from the outside air temperature Tam becomes more than a predetermined value X1, the electromagnetic valve 40 can be opened accurately. The solenoid valve 40 is opened after confirming that a large amount of refrigerant and oil are stagnant in the refrigerant supply pipe 72 (control to open the solenoid valve 40 in this embodiment). Also in this case, the heat pump controller 32 closes the solenoid valve 40 when the difference ΔPs is equal to...

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PUM

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Abstract

Provided is a vehicle air conditioner by which it is possible to prevent or mitigate a decrease in reliability resulting from oil remaining in a refrigerant supply pipe which is for cooling a heater.In the present invention, the following are executed: a cooling mode in which a solenoid valve (17) is opened and a refrigerant is sent to a heat absorber (9); and a heating mode in which the solenoidvalve (17) is closed. A heater cooling device (61) includes: a refrigerant / heat carrier heat exchanger (64) for exchanging heat between the refrigerant and a heat carrier; a refrigerant supply pipe (72) that branches off from the refrigerant downstream side of the solenoid valve (17) and that supplies the refrigerant to the refrigerant / heat carrier heat exchanger; and a solenoid valve (40) provided in the refrigerant intake opening of the refrigerant / heat carrier heat exchanger. The heater cooling device closes the solenoid valve (40) during the cooling mode and opens the solenoid valve (40)during the heating mode.

Description

technical field [0001] The present invention relates to a heat pump type air conditioner for air conditioning the interior of a vehicle, and more particularly to a vehicle air conditioner suitable for hybrid vehicles and electric vehicles equipped with batteries. Background technique [0002] Due to the manifestation of environmental problems in recent years, hybrid vehicles and electric vehicles that drive driving motors with electric power supplied from batteries (heat generating devices) have become popular. In addition, as an air-conditioning device applicable to such a vehicle, a device having a refrigerant circuit connected to a compressor that compresses and discharges the refrigerant and installed inside the vehicle interior to cool the air conditioner has been developed. The radiator for cooling the refrigerant, the heat absorber installed inside the compartment to absorb heat from the refrigerant, and the outdoor heat exchanger installed outside the compartment to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60H1/22B60H1/32
CPCB60H1/22B60H1/32
Inventor M.重田石关彻也堀越明
Owner SANDEN CORP
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