Calsonic Kansei Corporation

Calsonic Corporation

Other

Yoshitoshi Noda

Toshio Ohashi

Tadayoshi Tajima

Hiroyuki Yamaguchi

Hiroki Yoshioka

Kaoru Kamiyama

Toshiharu Watanabe

Nobuo Ichimura

Yasuhito Okawara

Yoshikazu Takamatsu

Akira Tsukamoto

Yoshihiro Nakamura

Katsunori Fujiura

Morihiro Takasaki

Yoshiaki Nanba

Atsushi Kubota

Mitsutoshi Sugano

Kenichi Abe

Osamu Kato

Kenichiro Sawano

A variable capacitance compressor is provided in a refrigeration cycle of a vehicular air conditioning system. The variable capacitance compressor controls discharge capacity of refrigerant by an external control pulse signal, and can substantially estimate compressor suction side pressure by the external control pulse signal and compressor discharge side pressure. A compressor torque calculator is provided to calculate torque based on evaporator upstream and downstream temperature difference data &#x394;t, which is a temperature difference between inlet side air temperature of an evaporator and outlet side air temperature of the evaporator, compressor discharge side pressure data Pd, duty ratio data of a control pulse signal, and compressor's number of revolution data.

Torque calculation apparatus and torque calculation method of variable capacitance compressor

The invention relates to a receiver-drier for use in an air conditioning system. This receiver-drier has (a) a lower portion defining a lower chamber in the receiver-drier; (b) an upper portion defining an upper chamber in the receiver-drier; and (c) a strainer for removing foreign particles from the refrigerant. The lower portion has an inlet for allowing the refrigerant to flow into the lower chamber and an outlet for allowing the refrigerant to flow out of the lower chamber. Each of the inlet and the outlet is formed at a bottom of the lower portion. The upper chamber is on top of the lower chamber and is charged with a desiccant for removing moisture from the refrigerant. The strainer is disposed at a position in a flow of the refrigerant from the inlet to the outlet.

Receiver-drier for use in an air conditioning system

An air conditioning system for a vehicle has a first cycle including a compressor, a first condenser, a second condenser, a liquid tank, an expansion valve and an evaporator which are connected through pipes to form a first refrigerant circulation circuit through which a refrigerant flows from an outlet of the compressor to an inlet of the compressor while changing the phase. The first cycle causes the evaporator to act as a cooler when operated. The system further has a second cycle including the compressor, the second condenser, the liquid tank, the evaporator and the evaporator which are connected through pipes to form a second refrigerant circulation circuit through which the refrigerant flows from the outlet of the compressor to the inlet of the compressor while changing the phase. The second cycle causes the condenser to act as a heater and the evaporator to act as a cooler when operated. The first and second cycles are switched by switch means. The system further has an air duct case having an air flow passage in which the second condenser and the evaporator are installed. The air flow passage is connected at its downstream part to a passenger room of the vehicle. The air conditioning system further comprises heater means for heating a returning refrigerant which, under operation of the second cycle, flows in the pipe extending from an outlet of the evaporator to the inlet of the compressor.

Automotive air conditioning system

An air conditioning unit is provided comprising a casing including an air flow passage, an evaporator and a heater arranged in the air flow passage, and an air flow control door for controlling an air amount flowing in a heater-passing passage. A water guide groove is provided at a bottom surface of the casing with a slanted bottom. A triangular projection is formed on the bottom surface of the casing, the triangular projection being oriented so that one apex of the projection is directed toward the front wall of the casing.

Automotive air conditioning unit

A refrigerating cycle has a condenser, an evaporator, a variable displacement compressor, and an expansion valve. The variable displacement compressor is connected between the condenser and the evaporator to form the refrigerating cycle, and includes a control valve designed to provide a control valve characteristic sloping downward with increase in a discharge pressure. The expansion valve is connected between the condenser and the evaporator, to return a refrigerant from the condenser through the evaporator to the variable displacement compressor, and designed to provide an open valve characteristic whose slope is approximately equal to the downward slope of the control valve characteristic.

Expansion valve for refrigerating cycle

A heat pump type air conditioning system (A) for an automotive vehicle. The heat type air conditioning system (A) comprises a first unit (,) including a heater core (,) through which an engine coolant of an engine flows, and a first heat exchanger (,) which forms part of a refrigeration cycle including a compressor (,) and a first condenser (,), in which a refrigerant circulates in the refrigeration cycle. A second unit (,) is provided including a second condenser (,) and a second heat exchanger (,) which are fluidly connected in parallel with the first heat exchanger (,). A valve (V,) is fluidly connected in series with the second condenser (,) and disposed such that a part of the refrigerant is introduced through the valve into the second condenser (,) and the second heat exchanger (,). A sub-heat exchanger (,) is disposed outside the first and second units and fluidly connected in series with the second heat exchanger (,), in which the refrigerant flowing from the second heat exchanger (,) is introduced into the sub-heat exchanger to be heated by a part of the engine coolant, the refrigerant discharged from the sub-heat exchanger being returned to the compressor. An electromagnetic clutch (,) is provided such that the compressor (,) is drivably connectable with the engine therethrough. The electromagnetic clutch is engaged to establish a driving connection between the compressor so as to operate the compressor and disengaged to cut the driving connection so as to make the compressor inoperative. A control device (C) is operatively connected to the electromagnetic clutch (,) for controlling the electromagnetic clutch to be disengageable in accordance with a temperature within the air conditioning system (A).

Heat pump type air conditioning system for automotive vehicle

A heat pump type air conditioning system (A) for an automotive vehicle. The heat type air conditioning system (A) comprises a first unit (10) including a heater core (11) through which an engine coolant of an engine flows, and a first heat exchanger (12) which forms part of a refrigeration cycle including a compressor (1) and a first condenser (3), in which a refrigerant circulates in the refrigeration cycle. A second unit (20) is provided including a second condenser (21) and a second heat exchanger (22) which are fluidly connected in parallel with the first heat exchanger (12). A valve (V2) is fluidly connected in series with the second condenser (21) and disposed such that a part of the refrigerant is introduced through the valve into the second condenser (21) and the second heat exchanger (22). A sub-heat exchanger (30) is disposed outside the first and second units and fluidly connected in series with the second heat exchanger (22), in which the refrigerant flowing from the second heat exchanger (22) is introduced into the sub-heat exchanger to be heated by a part of the engine coolant, the refrigerant discharged from the sub-heat exchanger being returned to the compressor. An electromagnetic clutch (40) is provided such that the compressor (1) is drivably connectable with the engine therethrough. The electromagnetic clutch is engaged to establish a driving connection between the compressor so as to operate the compressor and disengaged to cut the driving connection so as to make the compressor inoperative. A control device (C) is operatively connected to the electromagnetic clutch (40) for controlling the electromagnetic clutch to be disengageable in accordance with a temperature within the air conditioning system (A).

An air conditioning system for a motor vehicle powered by an internal combustion engine has a first system for carrying out a first cycle, which includes a compressor driven by the engine, a main condenser, a first sub-condenser and an evaporator which are connected through pipes to form a first refrigerant circulation circuit through which a refrigerant flows from an outlet of the compressor to an inlet of the same while changing its phase, the first cycle causing the first sub-condenser as a heater and the evaporator as a cooler when operated. The air conditioning system has further a second system for carrying out a second cycle, which includes the compressor and a second sub-condenser which are connected through pipes to form a second refrigerant circulation circuit through which the refrigerant flows from the outlet of the compressor to the inlet of the same while changing its phase, the second cycle causing the second sub-condenser as a heater when operated. First and second independent air flow passages are defined. The first passage has the heater core, the first sub-condenser and the evaporator installed therein, and the second passage has the second sub-condenser installed therein. A sub-evaporator is arranged in the pipe extending from an outlet of the second sub-condenser to an inlet of the compressor. A cooling water circuit is arranged through which engine cooling water of the engine is fed to the sub-evaporator to carry out heat exchange between the engine cooling water and the refrigerant flowing in the pipe. A control device is arranged to control, when the second system is under operation, the flow of engine cooling water directed to the sub-evaporator in accordance with a load of the engine.

A heat pump type air conditioning system (A) for air-conditioning a passenger compartment of an automotive vehicle. The air conditioning system comprises first and second units (10, 20). The first unit includes a heater core (12) and a first evaporator (13) while the second unit includes a second condenser (22) and a second evaporator (23). A compressor (2) and a first condenser (3) are disposed outside the first and second units which constitute a refrigeration cycle including the first evaporator (13). A circuit change-over valve (4) is provided to cause flow of the refrigerant discharged from the compressor (2) to be changed over between a refrigeration operation refrigerant circuit including the first condenser and a heating operation refrigerant circuit including a bypass passage for allowing the refrigerant to flow bypassing the first condenser. A third evaporator (30) is disposed outside the first and second units (10, 20). A flow control valve (31) is provided to control a flow amount of the engine coolant circulating through the third evaporator (30) in accordance with a thermal load condition of the vehicle under control of an opening degree of the flow control valve, during the heating operation of the air conditioning system. The flow control valve (31) is set to take its fully closed state to prevent the engine coolant from circulating through the third evaporator (30) when a discharge pressure of the compressor (2) rises to a level not lower a first set value which is lower than a standard value to stop an operation of the compressor, and to take its fully opened state to allow the engine coolant to circulate through the third evaporator (30) when the discharge pressure of the compressor (2) lowers to a level not higher than a second set value which is lower than the first set value.

Growing community of inventors

Tochigi, Japan

Yoshitoshi Noda