Abstract:
A displacement control valve of a variable displacement compressor opens and closes a communication passage extending between a portion of the compressor on which discharge pressure acts and a crank chamber of the compressor. The displacement of the compressor is controlled, such that discharge chamber pressure does not act on the valve body in the opening and closing direction, and pressures acting on the opposite ends of the valve body are maintained at the same level.
Abstract:
An air conditioner is switchable between a cooling mode and a heating mode using highly pressurized hot gas in a refrigerant cycle. During the cooling mode, a controller controls an input electric current to a solenoid to operate the control valve based on a lower pressure side pressure of the refrigerant cycle acting on a pressure sensitive mechanism and a quantity of the input electric current to the solenoid. During the heating mode, the controller controls the input electric current to the solenoid to operate the control valve based not on the lower pressure side pressure of the refrigerant cycle acting on the pressure sensitive mechanism, but only on the quantity of the input electric current to the solenoid.
Abstract:
A displacement control system (B) for a variable displacement compressor has an electromagnetic clutch (200), a displacement control valve (300) including a valve body (306) that is applied with pressure of a suction pressure region of a variable displacement compressor (100) and an electromagnetic force of a solenoid unit in an opposite direction to the pressure of a discharge pressure region, and biasing means that biases the valve body (306) in the same direction as the electromagnetic force, and means (453, 454, 405) for adjusting current, which adjusts current supplied to a displacement control valve coil (316) according to external information detected by external-information detecting means (403, 451, 452).
Abstract:
A variable displacement compressor comprising a displacement control valve disposed somewhere in a discharge pressure supply passageway capable of communicating with a crank chamber from a discharge chamber, and a fixed orifice disposed somewhere in a pressure relief passageway communicating with a suction chamber from the crank chamber, the displacement control valve being controlled in opening/closing operation to adjust a pressure in the crank chamber to control a piston stroke, wherein a part of the discharge pressure supply passageway and a part of the pressure relief passageway are formed as a common passageway communicating with a crank chamber end. Variable displacement control at a high reliability is possible with no foreign matter accumulation in the displacement control passageway, and the processing of a cylinder block is simplified.
Abstract:
[Object of the Invention] An object of the present invention is to provide an air conditioner whose operation mode is switchable between cooling mode and heating mode using highly pressurized hot gas in refrigerant cycle, wherein both a cooling mode operation for variably controlling the displacement of the variable displacement compressor, thereby controlling car interior cooling temperature to a predetermined level, and a heating mode operation for variably controlling the displacement of the variable displacement compressor, thereby controlling car interior heating temperature to a predetermined level, can be implemented.[Disclosure of the Invention] An air conditioner comprises a variable displacement compressor and a controller 400. The variable displacement compressor comprises a control valve provided with a valve body, a pressure sensitive mechanism 300A for sensing the lower pressure side pressure of a refrigerating cycle acting to force the valve body and a solenoid 300B for forcing the valve body based on an input electric current, position of the control valve is controlled to vary internal pressure of a control chamber, thereby variably controlling the displacement of the variable displacement compressor. The controller 400 controls the input electric current to the solenoid 300B to control the position of the control valve. Operation of the air conditioner is switchable between cooling mode and heating mode using highly pressurized hot gas in the refrigerant cycle. During the cooling mode operation, the controller 400 controls the input electric current to the solenoid 300B to operate the control valve based on the lower pressure side pressure of the refrigerant acting on the pressure sensitive mechanism 300A and the quantity of the input electric current to the solenoid 300B, and during the heating mode operation it controls the input electric current to the solenoid 300B to operate the control valve based not on the lower pressure side pressure of the refrigerant cycle acting on the pressure sensitive mechanism 300A but only on the quantity of the input electric current to the solenoid 300B.
Abstract:
[Object of the Invention] An object of the present invention is to provide a compressor comprising a compressing mechanism, a discharge chamber, a housing accommodating the compressing mechanism and the discharge chamber, a discharge port communicating with the discharge chamber through a discharge passage and also with an external refrigerant circuit, a muffler formed by an expanded space disposed on the discharge passage, and a check valve disposed on the discharge passage, wherein the pressure loss caused by the discharge passage is smaller than that in the conventional compressor.[Disclosure of the Invention] A compressor comprises a compressing mechanism, a discharge chamber, a housing accommodating the compressing mechanism and the discharge chamber, a discharge port communicating with the discharge chamber through a discharge passage and an external refrigerant circuit, a muffler formed by an expanded space disposed on the discharge passage, and a check valve disposed on the discharge passage. The check valve is disposed in the muffler to open and close an inlet of the muffler, and the muffler is formed by the housing and a cover independent of and connected to the housing.
Abstract:
A displacement control valve of a variable displacement inclined plate-type compressor, the displacement control valve controlling the discharge displacement of the compressor by opening and closing a communication path between a discharge chamber and a crank chamber. The displacement control valve has a valve hole formed in the communication path and always communicating with the discharge chamber, a valve body for opening and closing the valve hole, a support hole provided coaxially with the valve hole, a support rod slidably inserted into the support hole and connected to the valve body, an electromagnetic solenoid for driving the valve body, and a pressure sensing chamber for introducing a suction pressure or crank chamber pressure of the compressor into the end section of the support rod which is on the side opposite to the side of the valve body. The displacement control valve can be made smaller than conventional displacement control valves.
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.
Abstract:
A displacement control valve of a clutchless variable displacement inclined plate-type compressor for controlling the discharge displacement of the compressor by opening and closing a communication path between a discharge chamber and a crank chamber. The displacement control valve has a valve hole (106) formed in the communication path and always communicating with the discharge chamber, an inside control valve (100) for opening and closing the valve hole (106) by a valve body (112) operated in response to expansion and contraction of a pressure sensing member (109) for sensing a suction pressure, and an operation switching device (120) connected to the inside control valve for switching the inside control valve between an operating condition where the valve body opens and closes the valve hole in response to the expansion and contraction of the pressure sensing member and a non-operating condition where the valve body opens the valve hole independently of the expansion and contraction of the pressure sensing member. In this displacement control valve, because a discharge pressure Pd acts on both the valve body (112) and a pressure sensing rod (110), the force of the discharge pressure Pd for urging the valve body (112) in a valve opening direction is (Sr−Sv)Pd. The displacement control valve can be made smaller than conventional displacement control valves because (Sr−Sv) is very small.
Abstract:
A capacity control device controls a discharge capacity of a variable displacement compressor for use in an automotive air conditioning system. The air conditioning system has the compressor and an evaporator fan. The device includes a control, a first detector, and a second detector. The control changes the discharge capacity of the compressor between a minimum discharge capacity for that compressor and a maximum discharge capacity. The first detector detects an elapsed time of a minimum discharge capacity operation of the compressor. The second detector detects an impressed voltage of the evaporator fan of the air conditioning system. The discharge capacity increases from the minimum discharge capacity to a predetermined discharge capacity when the elapsed time of the minimum discharge capacity operation is greater than a predetermined time and when the impressed voltage of the evaporator fan is greater than a predetermined voltage.