Denso Corporation

Sanyo Electric Co., Ltd.

Terukazu Higuchi

Yoshinori Yanagimachi

Yasuhiro Yokoo

Tetsuya Takechi

Akira Yamaguchi

Yoshiharu Endo

Akira Umehara

Kei Okada

Shinichi Naganuma

Taisei Noguchi

Ryota Hirata

Setsuri Yoshinaga

Katsunori Nakajima

An electronic control unit is applied to an air conditioner, the air conditioner including a heating unit which heats a heat medium, a casing which allows an air flow to circulate toward a compartment, a blower which generates the air flow in the casing, and a heat exchanger disposed in the casing that heats the air flow by exchanging heat between the heat medium heated by the heating unit and the air flow. The blower air volume of the blower is controlled based on a first candidate value determined based on an estimated blowing temperature, and a second candidate value determined based on a required blowing air temperature and the estimated blowing temperature. The second candidate value is set as a predetermined value when a warm-up operation of the heating unit is completed.

Electronic control unit for air conditioner

A vehicular air conditioner includes an air conditioning, a heater core, a heat pump cycle unit, a temperature detector, and a controller. The heat pump cycle unit includes a first inside heat exchanger disposed downstream of the heater core in a flow direction of a conditioning air, a second inside heat exchanger disposed upstream of the heater core in the flow direction of the conditioning air, and an outside heat exchanger. The temperature detector is configured to detect a passage air temperature, the passage air temperature being a temperature of the conditioning air that has passed through the heater core. The controller is configured to selectively switch a circuit layout of the heat pump cycle unit between a cooling circuit, a heating circuit, and a dehumidifying-heating circuit based on the passage air temperature.

Vehicular air conditioner

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.

Air conditioner for vehicle with defroster control

A piping connection device includes a female block member fixed integrally with a male block member, and a first pipe is inserted into the female block member. The piping connection device further includes a drain passage through which a part of an outer peripheral surface of the first pipe communicates with an outer surface of the female block member. The drain passage is disposed in a portion higher in heat capacity than the other portions in the female block member.

Growing community of inventors

Okazaki, Japan

Terukazu Higuchi