Denso Corporation

Yasuhiro Yokoo

Yoshinori Yanagimachi

Terukazu Higuchi

Yoshiki Katoh

Yoshinori Ichishi

Hiroaki Kawano

Akira Umehara

Tatsurou Kyuto

Yoshio Hayashi

Naito Muto

Junki Hirayama

Yukihisa Ijuin

In an air conditioner, a heat medium circuit includes: a first branch part, a first merging part, a second branch part, and a second merging part. A first flow rate adjusting unit is disposed in the heat medium circuit between the first branch part and an outside-air heat exchanger or between the outside-air heat exchanger and the first merging part, and a second flow rate adjusting unit is disposed in the heat medium circuit between the first branch part and the first heater core or between the first heater core and the first merging part. At least one of the first flow rate adjusting unit or the second flow rate adjusting unit is configured to optionally adjust the flow rate of the heat medium, and a controller controls the at least one of the first flow rate adjusting unit or the second flow rate adjusting unit.

Air conditioner

A refrigeration cycle device includes: a switching valve configured to switch between a battery mode in which refrigerant flows to a battery heat exchanger and a non-battery mode in which the refrigerant bypasses the battery heat exchanger; and a controller controlling a compressor and the switching valve. The controller includes an estimation unit configured to estimate an oil stagnation amount, which is an amount of lubricating oil accumulated in the battery heat exchanger in accordance with execution of the non-battery mode. The controller includes a determination unit configured to determine whether lubricating oil in the battery heat exchanger needs to be recovered on the basis of the oil stagnation amount. The controller includes an execution unit configured to execute an oil recovery mode for recovery of lubricating oil in the battery heat exchanger when the determination unit determines that lubricating oil needs to be recovered.

Refrigeration cycle device

A vehicle air conditioner includes a heat pump cycle and a refrigerant-circuit controller. The heat pump cycle includes an inside heat exchanger and a refrigerant-circuit switching device. The inside heat exchanger performs heat exchange between a refrigerant and a blown air that is to be blown into a vehicle compartment. The refrigerant-circuit switching device switches between a refrigerant circuit of a cooling mode and a refrigerant circuit of a non-cooling mode. The refrigerant-circuit controller selects the cooling mode or the non-cooling mode based on an air-conditioning load, the refrigerant-circuit controller controlling an operation of the refrigerant-circuit switching device. Upon selecting the non-cooling mode, the refrigerant-circuit controller starts performing a cooling-mode unallowable control in which the refrigerant circuit of the cooling mode is prohibited from being selected regardless of the air-conditioning load.

Vehicle air conditioner

When a battery control unit allows use of the electric compressor, an air conditioning control unit performs air-conditioning of a cabin in such a manner that the air conditioning control unit controls the electric compressor to be operated. When the battery control unit prevents use of the electric compressor, the air conditioning control unit controls the electric compressor to be stopped. In addition, the air conditioning control unit heats a windshield in such a manner that the air conditioning control unit controls a window heater to be operated. Accordingly, even when the electric compressor is stopped, fogging of the windshield is suppressed. The air conditioning control unit does not give an excessive feeling of discomfort or unease to a user, because the air conditioning control unit continuously performs a normal air-conditioning control. Fogging of the windshield can be suppressed in a state where power consumption relative to a battery is suppressed.

Electric vehicle air-conditioning device

An air conditioner for a vehicle includes a cycle switching device. The cycle switching device switches a refrigerant cycle between a heating circuit, in which refrigerant flows through a heating heat exchanger, and a cooling circuit, in which refrigerant flows through a cooling heat exchanger. The air conditioner further includes an air conditioning controller, which controls the cycle switching device and includes a defroster control portion. The defroster control portion increases a temperature of air blown into the vehicle compartment through a defroster air outlet by a predetermined degree while keeping the refrigerant cycle at a state of the heating circuit for a predetermined time, when a defrosting operation is commanded to be performed during the heating circuit.

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Kariya, Japan

Yasuhiro Yokoo