Sanden Holdings Corporation

Sanden Automotive Climate Systems Corporation

Hitachi, Ltd.

Sanden Corporation

Hitachi Unisia Automotive, Ltd.

Honda Motor Co., Ltd.

Ryo Miyakoshi

Kenichi Suzuki

Kouhei Yamashita

Kohei Yamashita

Hidenori Takei

Tetsuya Ishizeki

Megumi Shigeta

Kenichi Machida

Masahiro Arai

Takahiro Yoshino

Osamu Takazawa

Akira Horikoshi

Kazuki Sekiguchi

Yuma Yamazaki

Yoshiyuki Kobayashi

Hatsuo Nagaishi

Masahiko Watanabe

Naoki Okamoto

Kentaro Mikawa

Takashi Toyama

Wataru Iwazaki

Masaaki Sato

Nobutaka Shimizu

Yuko Nagaishi, Legal Representative

Takafumi Aoki

A heat medium temperature adjustment system includes a heat medium circuit configured to circulate heat medium having a temperature controlled by a heat exchange with a heat source. The heat medium circuit includes a pump configured to pump the heat medium, and a plurality of heat exchangers for temperature-adjustment subjects configured to perform heat exchanges with temperature-adjustment subjects. The heat medium circuit is configured to form a series flow path to connect the pump to the plurality of heat exchangers for temperature-adjustment subjects when a system malfunction occurs.

Heat medium temperature adjustment system

An air conditioner for a vehicle is provided which can realize suitable temperature control when having a plurality of evaporators even if the load in each evaporator fluctuates. An air conditionerfor a vehicle includes at least a compressor, a heat absorberto evaporate a refrigerant, a refrigerant-heat medium heat exchanger, and a control device, and conditions air of a vehicle interior. The control devicecalculates target numbers of revolutions TGNCc and TGNCcb of the compressorrequired to control the temperature of the heat absorberand the temperature of a heat medium cooled by the refrigerant-heat medium heat exchanger, respectively, and selects the maximum value of them to control the operation of the compressor

Air conditioner for vehicle

It is an object to improve the reliability of a temperature adjusting device which cools an in-vehicle device such as a battery by using a refrigerant. A device temperature adjusting devicethat is an in-vehicle device temperature adjusting device adjusts the temperature of a batterymounted on a vehicle and includes a refrigerant circuit R having a compressorwhich compresses a refrigerant, an outdoor heat exchangerfor letting the refrigerant radiate heat, and a refrigerant-heat medium heat exchangerfor cooling the batteryby letting the refrigerant absorb heat, and a control device. The control devicestops the compressoron the basis of the fact that the refrigerant circuit R is blocked.

In-vehicle device temperature adjusting device and vehicle air conditioning device provided with same

A vehicle air conditioning device is provided which is capable of accurately judging the need for temperature regulation of an object of temperature regulation mounted in a vehicle and efficiently performing temperature regulation. A compressorto compress a refrigerant, an indoor heat exchanger (radiatorand heat absorber) for exchanging heat between air supplied to a vehicle interior and the refrigerant, an outdoor heat exchangerdisposed outside the vehicle interior, and a control deviceare provided to perform air conditioning of the vehicle interior. An equipment temperature adjusting devicefor adjusting the temperature of the object of temperature regulation mounted in the vehicle is provided. The control device controls the equipment temperature adjusting deviceon the basis of a gradient (&#x394;Tw) of a change in an index indicating the temperature of the object of temperature regulation.

Vehicle air conditioning device

A vehicle air-conditioning apparatus is provided which is capable of expanding an effective range of a dehumidifying and heating mode to achieve comfortable vehicle interior air conditioning. A control device (controller) executes a dehumidifying and heating mode to let a refrigerant discharged from a compressorradiate heat in a radiator, let a part of the refrigerant flow from a bypass circuit (refrigerant pipeF) to an indoor expansion valve, and let the residual refrigerant flow through an outdoor expansion valve. In the dehumidifying and heating mode, the control device has a state of controlling the operation of the compressor, based on a heat absorber temperature Te and executes a radiator temperature priority mode which enlarges a capability of the compressor when heat radiation in the radiator is insufficient.

Vehicle air-conditioning apparatus

A vehicle air conditioner capable of making a determination that the dehumidification is unnecessary in a vehicle interior early to make a prompt transition from a dehumidifying mode to a heating mode and reduce power consumption is provided. A control device executes a heating mode to let a refrigerant discharged from a compressorradiate heat in a radiator, decompress the refrigerant, and then let the refrigerant absorb heat in an outdoor heat exchanger, and a dehumidifying mode to let the refrigerant flow into the outdoor heat exchanger without flowing to the radiator to radiate heat therein, decompress the refrigerant, and then let the refrigerant absorb heat in a heat absorberand let an auxiliary heatergenerate heat. The control device shifts from the dehumidifying mode to the heating mode on the basis of the heat absorber suction air temperature Tevain being lowered more than a target heat absorber temperature TEO.

Vehicle air conditioner

A heating temperature is appropriately estimated according to an operation mode to achieve comfortable vehicle interior air conditioning. A vehicular air conditioning deviceincludes a compressor, an air flow passage, a radiatorfor heating air to be supplied to a vehicle interior, a heat absorberfor cooling the air to be supplied to the vehicle interior, and a heat pump controller. The heat pump controller calculates a heating temperature TH being the temperature of air on a leeward side of the radiator and use the heating temperature in control, and calculates the heating temperature TH using an estimation formula which differs depending on the operation mode.

Vehicular air conditioning device

There is disclosed a vehicle air conditioning device which inhibits generation of noise in a solenoid valvedisposed on an inlet side of a radiatorand improves durability of the solenoid valve. A second operation mode is executed to shut off an outdoor expansion valve, close the solenoid valve, open a solenoid valveand thereby send a refrigerant discharged from a compressorthrough a bypass pipeto an outdoor heat exchanger. When a first operation mode to open the solenoid valveand close the solenoid valveand thereby send the refrigerant to the radiatoris shifted to the second operation mode, a controller opens the solenoid valveat a timing to stop the compressor

A vehicle air-conditioning device is provided which is capable of eliminating or suppressing vibration and noise generated due to the application of a counterpressure to an opening/closing valve. The vehicle air-conditioning device includes a refrigerant circuit R having a compressor, a radiatorto perform heat exchange between a refrigerant and air, an outdoor heat exchanger, a heat absorber, and a solenoid valve. The compressorand the solenoid valveare controlled to air-condition a vehicle interior. A decompression speed at a refrigerant inflow side of the solenoid valve when the compressoris stopped and the solenoid valveis closed is faster than that at a refrigerant outflow side thereof. When operation is stopped from a state in which the compressoris operating with the solenoid valvebeing in an opened state, the opened state of the solenoid valveis maintained even after the compressoris stopped.

Vehicle air-conditioning device

A vehicle air-conditioning device is provided which is capable of eliminating inconvenience due to a reduction in heating capability when changing from heat absorption from outdoor air to heat absorption from a heat medium. A heat-generating equipment temperature adjusting devicehas a heat medium heating heaterand a refrigerant-heat medium heat exchanger. The vehicle air-conditioning device has first and second heat medium heat absorption/heating modes to let a refrigerant discharged from a compressorradiate heat in a radiator, decompress the refrigerant from which the heat has been radiated, and then let the refrigerant absorb heat in the refrigerant-heat medium heat exchanger. When the temperature of the heat medium is a predetermined threshold Tor less upon changing from a heating operation to the first and second heat medium heat absorption/heating modes, the heat medium is heated by the heat medium heating heater before the changing.

There is provided a vehicle air conditioning device of a heat pump system which improves comfortability when changing to heating only by an auxiliary heating device. The device includes a heating medium circulating circuitto heat air to be supplied from an air flow passageto a vehicle interior, and when shifting to the heating of the vehicle interior only by the heating medium circulating circuitin a heating mode, a controller executes a shifting control to increase a heating capability of the heating medium circulating circuitprior to stopping a compressorand decrease a heating capability of a radiatorin accordance with the increase of the heating capability of the heating medium circulating circuit

There is disclosed a vehicle air conditioner device of a so-called heat pump system to accurately perform efficient and comfortable heating of a vehicle interior. The vehicle air conditioner device includes a heating medium circulating circuitwhich heats air to be supplied from an air flow passageto a vehicle interior. A controller calculates a required heating capability TGQhtr of the heating medium circulating circuit to complement a shortage of an actual heating capability Qhp to a required heating capability TGQ of a radiator. The controller calculates a decrease amount &#x394;Qhp of the actual heating capability Qhp from a difference &#x394;TXO between a refrigerant evaporation temperature TXO of an outdoor heat exchangerand a refrigerant evaporation temperature TXObase in non-frosting, and adds the decrease amount &#x394;Qhp to the required heating capability TGQhtr to execute the heating by the heating medium circulating circuit.

Vehicle air conditioner device

Vehicle air conditioning device of a heat pump system in which comfort is compatible with decrease of power consumption. The vehicle air conditioning device includes a heating medium circulating circuitto heat air to be supplied from an air flow passageto a vehicle interior, and in a heating mode, a controller has an energy saving prior mode in which the controller operates a compressorat a maximum number of revolution and complements a shortage of a heating capability by a radiatorwith heating by a heating medium-air heat exchangerof the heating medium circulating circuit, and a comfort prior mode in which the controller limits a number of revolution of the compressorand complements the shortage of the heating capability by the radiatorwith the heating by the heating medium-air heat exchangerof the heating medium circulating circuit

There is disclosed a vehicle air-conditioning device in which a refrigerant subcool degree in a radiator is appropriately controlled, so that comfortable and efficient vehicle interior air conditioning is achievable. The vehicle air-conditioning device executes a heating mode in which a controller lets a refrigerant discharged from a compressorradiate heat in a radiator, decompresses the refrigerant by which heat has been radiated by an outdoor expansion valve, and then lets the refrigerant absorb heat in an outdoor heat exchanger. In the heating mode, the vehicle air-conditioning device controls a refrigerant subcool degree SC of the radiatorby the outdoor expansion valve. On a basis of a radiator inlet air temperature THin that is a temperature of the air flowing into the radiator, the controller corrects a target subcool degree TGSC that is a target value of the refrigerant subcool degree SC in the radiatorin a lowering direction, as the radiator inlet air temperature THin rises.

A vehicle air conditioner which is capable of inhibiting liquid return to a compressor and generation of noise due to bumping in an accumulator. There are executed a heating mode to close a solenoid valve, open a solenoid valve, let a refrigerant radiate heat in a radiator, decompress the refrigerant through an outdoor expansion valve, let the refrigerant absorb heat in an outdoor heat exchanger, and send the refrigerant to an accumulator, and a dehumidifying and heating mode to open the solenoid valve, close the solenoid valve, decompress the refrigerant through an indoor expansion valve, let the refrigerant absorb heat in a heat absorber, and generate heat in an auxiliary heater. A valve position of the outdoor expansion valveis reduced for a predetermined period of time before shifting from the heating mode to the dehumidifying and heating mode.

Growing community of inventors

Isesaki, Japan

Ryo Miyakoshi