US Patent No. 10,369,864

VEHICLE AIR CONDITIONER DEVICE


Patent No. 10,369,864
Issue Date August 06, 2019
Title Vehicle Air Conditioner Device
Inventorship Tetsuya Ishizeki, Isesaki (JP)
Megumi Shigeta, Isesaki (JP)
Yasunobu Takano, Isesaki (JP)
Hidenori Takei, Isesaki (JP)
Osamu Takazawa, Isesaki (JP)
Assignee SANDEN HOLDINGS CORPORATION, Isesaki-shi, Gunma (JP)

Claim of US Patent No. 10,369,864

1. A vehicle air conditioner device comprising:a compressor which compresses a refrigerant;
an air flow passage through which air to be supplied to a vehicle interior flows;
a radiator which lets the refrigerant radiate heat to heat the air to be supplied from the air flow passage to the vehicle interior;
a heat absorber which lets the refrigerant absorb heat to cool the air to be supplied from the air flow passage to the vehicle interior;
an outdoor heat exchanger disposed outside the vehicle interior to let the refrigerant radiate or absorb heat;
a plurality of solenoid valves to change a flow of the refrigerant of a refrigerant circuit;
auxiliary heating means for heating the air to be supplied from the air flow passage to the vehicle interior; and
control means for controlling the compressor, the solenoid valves and the auxiliary heating means,
the vehicle air conditioner device controlling the solenoid valves by the control means to change the flow of the refrigerant, thereby executing one of:
a heating mode in which the control means lets the refrigerant discharged from the compressor radiate heat in the radiator, decompresses the refrigerant by which heat has been radiated, and then lets the refrigerant absorb heat in the outdoor heat exchanger;
a dehumidifying mode in which the control means lets the refrigerant discharged from the compressor radiate heat in the radiator, decompresses the refrigerant by which heat has been radiated, and then lets the refrigerant absorb heat in the heat absorber; and
a cooling mode in which the control means lets the refrigerant discharged from the compressor radiate heat in the outdoor heat exchanger, decompresses the refrigerant by which heat has been radiated, and then lets the refrigerant absorb heat in the heat absorber,
wherein the dehumidifying mode includes:
a dehumidifying and heating mode in which the control means lets the refrigerant discharged from the compressor radiate heat in the radiator, decompresses the refrigerant by which heat has been radiated, and lets the refrigerant absorb heat in the heat absorber and the outdoor heat exchanger; and
a dehumidifying and cooling mode in which the control means lets the refrigerant discharged from the compressor radiate heat in the radiator and the outdoor heat exchanger, decompresses the refrigerant by which heat has been radiated, and lets the refrigerant absorb heat in the heat absorber, and
wherein the control means has a predetermined air conditioning mode during failure, and failure detecting means for detecting a failed solenoid valve of the plurality of solenoid valves, and
the control means changes the flow of the refrigerant to the other operation mode that enables dehumidifying of the vehicle interior to obtain the air conditioning mode during failure, to continue the air conditioning of the vehicle interior, in a case of detecting that the failed solenoid valve fails in the dehumidifying and heating mode or the dehumidifying and cooling mode.