Mitsubishi Jukogyo Kabushiki Kaisha

Churyo Engineering Co., Ltd.

Ryosaku Akimoto

Yukio Yoshida

Ryutaro Fukumoto

Nobuaki Ito

Ryuhei Tanigaki

Tetsuo Ono

Hideo Kanno

Shuji Oyagi

Tsutomu Itahana

Kiichi Yamada

Susumu Kobayashi

Akira Tanaka

Futoru Furuta

Shigetoshi Tanaka

Nakaji Kawauchi

Jun Iimura

Akio Senoo

An improvement in a capacity control valve for use in a fluid compressor with a relatively high pressure HP and a relatively low pressure LP for changing the operational characteristics thereof by using the relatively high pressure HP taking into consideration that an increased pressure loss of the refrigerant as generated from an increased flow rate thereof and the thermal load on the car cooler would occasionally occur on the part of the relatively high pressure HP during the operation. Wherein a capacity control valve, of the type operative to take the intermediate pressure AP, for the control of a specific amount of compressed gas to be bypassed to the suction side of the fluid compressor, as a linear function of the relatively low pressure LP using a differential pressure between the relatively high pressure HP and the relatively low pressure LP of the fluid compressor, comprises an adjusting device adapted to adjust the intermediate pressure AP in such a manner that the relative low pressure LP is made lower as the relatively high pressure HP becomes higher, and the relatively low pressure LP is made higher as the relatively high pressure HP becomes lower.

Capacity control valve for a compressor

In an air conditioner of vehicles including a fan for sending air, a cooling unit for cooling air sent by the fan, a heater for heating air sent by the fan, an air mix damper for adjusting the amount of air passing through the heater and cooled by the cooling unit, and a control unit for controlling an opening of the air mix damper in response to a cooling and heating load, a controller for an air conditioner of vehicles has a dehumidifying operation mode in which the opening of the air mix damper is adjusted to effect the air conditioning operation and an energy saving operation mode in which the duty ratio of turning on and off a compressor is changed to effect the air conditioning operation, and comprises a fan drive control unit for increasing the amount of wind in a region where the cooling and heating load is large.

Controller for an air conditioner of vehicles

In an air conditioner, the control of the airflow rate is effected by utilizing both the temperature deviation between the room temperature and a set temperature and an air-mix damper position as a proportional control factor with the airflow rate compensation being based on an incremental integer control factor which has been derived from the temperature deviation.

Controlling the airflow rate in an air conditioner

An air cooling temperature control system for use in vehicles including a cooler having a compressor, a heater having an air-mix damper and a room air temperature regulator, in which feedback control is effected so that a room air temperature may coincide with a preset temperature value. The output of the heater is regulated to respond to sudden changes in the room air temperature by controlling the opening of the air-mix damper. The duty cycle of the compressor is regulated by a controller so as to respond to gradual changes in room air temperature while the output of the heater is at a low level and to incrementally decrease the duty cycle of the compressor when the output of the heater is above the low level, thereby driving the output of the heater down so as to minimize the counteracting effects of concurrent heating and cooling, so that the desired room air temperature is maintained with minimal energy.

Air temperature control system for vehicles

A control device is used in a car-mounted air-conditioner of the air mixing type, in which a portion of the cold air, obtained by passing air through an evaporator, is heated by a heater via an air mixing damper. The control device includes a pulse generator, which is supplied with the outputs of a temperature setting device and of a room temperature sensor both of which are provided in a car in which the air-conditioner is mounted. The control device provides an amplified multi-phase pulse signal, based on deviations of the outputs, to an intermittent driving device responsive for rotating the air mixing damper.

Control device for car-mounted air-conditioner

An air conditioner for vehicles in which the temperature of an evaporator is detected and an ON-OFF control of the compressor is achieved to maintain the evaporator temperature at a pre-set temperature. The air conditioner has means for detecting the temperature of air flowing into the evaporator, and means for varying the pre-set temperature in such a manner that the pre-set temperature is increased as the detected air temperature is decreased and is decreased as the detected air temperature is increased.

Air conditioner for vehicles

An air conditioning apparatus for an automobile having a compartment comprises a cooling unit including an evaporator for cooling air, a heater for heating a portion of the cooled air, an air mixing damper for mixing the cooled air with the heated portion thereof and introducing the mixture into the compartment of the automobile, a control device for controlling the air mixing damper based on temperatures inside and outside of the compartment to keep the former at a constant temperature, a variable resistor connected operatively to the air mixing damper, and a temperature detector for detecting the temperature of the evaporator or the temperature of the cooled air supplied therefrom, the control device being responsive to an output of the variable resistor and the temperature detector for changing an operation command signal for the cooling unit.

Growing community of inventors

Nagoya, Japan

Ryosaku Akimoto