Abstract:
A variable displacement compressor having a swash plate capable of being changed with inclination angle for converting the rotation of a drive shaft into the reciprocating motion of pistons comprises a plurality of urging means each having one end brought into contact with the swash plate and urging the swash plate in the direction of increasing an inclination angle of the swash plate, wherein the plurality of urging means are constructed so that the number of urgings is increased as the inclination angle of the swash plate is decreased. The freedom of adjustment of the urging force due to the urging means for increasing the inclination angle of the swash plate can be enlarged by a simple structure, and the urging force can be finely adjusted in accordance with the inclination angle of the swash plate. Consequently, the adjustment of the urging force due to the urging means for urging the swash plate in the inclination angle increasing direction can be optimized, and the swash plate can be allowed to perform a desirable operation near the minimum inclination angle.
Abstract:
A displacement control system (A) of a variable displacement compressor comprises a target pressure setting means (402A) setting a target for pressure in an intake chamber or a crank chamber, on the basis of evaporator-outlet air temperature detected by an evaporator-outlet air temperature detection means (510) and a target for evaporator-outlet air temperature set by an evaporator-outlet target air temperature setting means (512), a discharge pressure detection means (500) detecting the pressure of a refrigerant in a high-pressure section, and a current regulation means (404, 406) regulating current supplied to a solenoid (316) of a displacement control valve, on the basis of the pressure of the refrigerant in the high-pressure section detected by the discharge pressure detection means (500) and the target for pressure set by the target pressure setting means (402A).
Abstract:
A discharge displacement control system for a variable displacement compressor includes controlled object setting means. The controlled object setting means selects a control mode out of two or more control modes in accordance with external information detected by external information detection means, and sets a controlled object matching the selected control mode. In accordance with the external information detected by the external information detection means, the controlled object setting means sets, as the controlled object, a target pressure for one of a pressure in a suction pressure region and a pressure in a crank chamber in a first control mode, which is one of the control modes, and a target working pressure difference between a pressure in a discharge pressure region and one of the pressure in the suction pressure region and the pressure in the crank chamber in a second control mode, which is another of the control modes.
Abstract:
A connector is provided to be connected to a solenoid embedded in a hole formed on a housing of a device to be attached. The connector is provided with connector electric terminal members which can be engaged with electric terminal members of the solenoid, and a case which stores the connector electric terminal members, is removably attached to the solenoid and covers an opening edge part of the hole. The structure of the connector requires lower process cost for ensuring waterproof and corrosion resistance of the solenoid, compared with a conventional structure. Optionally, a seal between the case and opening edge part of the hole and a diode between the connector electric terminal members and electric terminal members of the solenoid is provided.
Abstract:
A capacity control valve is inserted in a flow path connecting a discharge chamber and a crank chamber of a variable capacity compressor and provided with a valve unit and a drive unit. The valve unit has a valve element for opening/closing the flow path or a valve passage of the valve unit. The drive unit has a movable core or plunger for driving the valve element and a communicating path that is formed in the plunger and connects chambers located in both sides of the plunger.
Abstract:
A variable displacement compressor is provided with a displacement control valve mechanism (93). This displacement control valve mechanism includes a pressure chamber (127) defined from a valve chamber (97), a second passage (89) leading to the pressure chamber and a crank chamber (29), and a valve guide portion (119) which supports a valve body (117) while allowing the valve body inserted therein. This displacement control valve mechanism has one end of the valve body exposed to the pressure chamber, its pressure receiving area being Sc. The variation in the characteristics of this displacement control valve mechanism can be realized by the alteration in Sc, which alteration is practically easy.
Abstract:
A variable capacity type slant plate type compressor including a crank chamber, a suction chamber and a discharge chamber is disclosed. The crank chamber is linked by a first communication path to the suction chamber, and is linked by a second communication path to the discharge chamber. A first valve control mechanism is disposed within the first communication path and second valve control mechanism is disposed within the second communication path. Fluid communication between the crank and suction chambers is controlled by the first valve control mechanism so that the suction chamber pressure is maintained at one predetermined constant value while fluid communication between the crank and discharge chambers is continuously closed. Fluid communication between the crank and discharge chambers is opened by the second valve control mechanism when the predetermined constant value of the suction chamber pressure must be increased. However, in the latter condition, fluid communication between the crank and suction chambers is continuously closed as long as the crank chamber pressure is not abnormally increased.
Abstract:
A slant plate type compressor with a capacity or displacement adjusting mechanism is disclosed. The compressor includes a housing having a cylinder block provided with a plurality of cylinders and a crank chamber. A piston is slidably fitted within each of the cylinders and is reciprocated by a drive mechanism which includes a member having a surface with an adjustable incline angle. The incline angle is controlled by the pressure in the crank chamber. The pressure in crank chamber is controlled by control mechanism which comprises a passageway communicating between the crank chamber and a suction chamber, a first valve device to control the closing and opening of the passageway and a second valve device to control pressure in an actuating chamber. The first valve device includes a bellows valve element and a valve shifting element. The valve shifting element of which one end is exposed in the actuating chamber is coupled to the bellows to apply a force to the bellows at another end and thereby shift a control point of the bellows in response changes in the actuating chamber pressure.
Abstract:
A displacement control system (A) of a variable displacement compressor sets a target for pressure in an intake chamber or a crank chamber, on the basis of a detected evaporator-outlet air temperature and a target for evaporator-outlet air temperature. The pressure of a refrigerant in a high-pressure section is detected, and a regulating current is supplied to a solenoid (316) of a displacement control valve, on the basis of the pressure of the refrigerant in the high-pressure section and the target for pressure.
Abstract:
[Object of the Invention]An object of the present invention is to provide a reciprocation compressor comprising an extraction passage connecting a crank chamber with an inlet chamber, an aperture disposed in the extraction passage and a filter capturing foreign matters flowing from the crank chamber to the inlet chamber, wherein the foreign matters captured by the filter is restrained from returning to the crank chamber even if reverse flow of refrigerant from the inlet chamber to the crank chamber is generated, and the filter does not restrict design specifications of other members of the compressor.[Disclosure of the Invention]A reciprocation compressor comprises an extraction passage connecting a crank chamber with an inlet chamber, an aperture disposed in the extraction passage and a filter capturing foreign matters flowing from the crank chamber to the inlet chamber, and the filter is located downstream of the aperture in relation to the flow of the refrigerant in the extraction passage from the crank chamber to the inlet chamber, and the filter is disposed in the inlet chamber.