REFRIGERATING CYCLE OF VEHICULAR AIR CONDITIONER

Japanese Patent JP2023147718

A

To provide a refrigerating cycle of a vehicular air conditioner which suppresses that lubricant of a compressor inner part flows out to the outside of a compressor due to movement of coolant in the refrigerating cycle caused by a temperature change even in a refrigerating cycle in which a charging quantity of coolant is large.SOLUTION: A refrigerating cycle 100 includes a compressing device (compressor 101), a condensing device (condenser (102) which condenses coolant compressed by the compressor, an expansion device (expansion valve 106) which pressure reduction expands coolant condensed by the condensing device, and an evaporation device (evaporator 103) which evaporates coolant expanded via the expansion device, the compression device and the condensing device being connected by means of high-pressure piping 104, and the evaporation device and the compression device being connected by low-pressure piping 108. Therein, a bypass piping 109 which bypasses the compressing device and connects the low-pressure piping 108 and the high-pressure piping 104 is provided and, in the bypass piping, flow control means 110 which permits a flow when a pressure of the high-pressure piping side is equal to a pressure of the low-pressure piping side and intercepts the flow when the pressure of the high-pressure piping side is higher than the pressure of the low-pressure piping side by a predetermined value or more.SELECTED DRAWING: Figure 1

ONO MITSUYA
MATSUSHITA YUKI
SUZUKI RYOMA
WAGAMITSU MAYUKO
MATSUNAGA YASUHIRO
KATO TOSHINORI
ZAMA TAKAHIRO

JP2022055393A

October 13, 2023

March 30, 2022

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VALEO JAPAN CO LTD
DAIMLER TRUCK AG

F25B1/00

Kotake & Partners Patent Attorney Corporation

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