Patent ID: 6390784
Filing Date: 2002-05-21
Classification: F04B

Abstract:
A compressor comprising a drive plate located in a crank chamber and tiltably mounted on a drive shaft and a piston operably coupled to the drive plate and located in a cylinder bore, wherein, during operation, the drive plate converts the rotation of the drive shaft to reciprocating movement of the piston in the cylinder bore, the piston compresses gas supplied to the cylinder bore from a suction chamber and discharges the compressed gas to a discharge chamber from the cylinder bore, the inclination of the drive plate is variable according to a difference between the pressure in the crank chamber and the pressure in the cylinder bore, and the piston moves by a stroke determined by the inclination of the drive plate to control the displacement of the compressor, the compressor further comprising:means for adjusting the difference between the pressure in the crank chamber and the pressure in the cylinder bore, wherein the adjusting means includes a gas passage for conducting gas to adjust the pressure and a control valve for adjusting the amount of the gas flowing in the gas passage; wherein the control valve comprises a valve body for adjusting the opening size of the gas passage and a solenoid selectively excited and de-excited based on a supply of electric current to actuate the valve body, wherein the solenoid generates a counter-electromotive force based on the self-inductance of the solenoid when the solenoid is de-excited; means for supplying the current to the solenoid; a first detachable connector having a plus and a minus terminal electrically connected to the solenoid; a protector electrically connected in parallel with the plus and the minus terminal of the first detachable connector and with the solenoid to pass the current based on the counter-electromotive force generated in the solenoid through the protector to prevent the current based on the counter-electromotive force from being supplied to the supplying means; and a second detachable connector electrically connected to the supplying means for detachably connecting the supplying means to the first detachable connector.