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
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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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