Control valve unit with independently operable valve mechanisms for variable displacement compressor
First Claim
1. A control valve in a variable displacement compressor that adjusts the discharge displacement based on controlling inclination of a drive plate located in a crank chamber, wherein the compressor includes a piston operably coupled to the drive plate and located in a cylinder bore, wherein 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, wherein the inclination of the drive plate is variable based on the pressure in the crank chamber, wherein a supply passage connects the discharge chamber with the crank chamber to supply the gas from the discharge chamber to the crank chamber, and wherein a bleeding passage connects the crank chamber with the suction chamber to release the gas from the crank chamber to the suction chamber, the control valve comprising:
- a single housing;
a first valve mechanism retained in the housing to selectively open and close the supply passage, wherein the first valve mechanism has a first valve hole defined in the housing to be located in the supply passage, a first valve body for selectively opening and closing the first valve hole, and a first plunger connected to the first valve body;
a second valve mechanism retained in the housing to adjust the flow rate of the gas released from the crank chamber to the suction chamber through the bleeding passage, wherein the second valve mechanism has a second valve hole defined in the housing to be located in the bleeding passage, a second valve body for adjusting the opening size of the second valve hole, and a second plunger connected to the second valve body, wherein the first valve mechanism and the second valve mechanism operate independently; and
a single solenoid mechanism retained in the housing, wherein the solenoid mechanism is selectively excited and de-excited based on a supply of current to independently actuate the first valve mechanism and the second valve mechanism, wherein the solenoid mechanism has a fixed core and a coil, the first plunger and the second plunger are adjacent to the fixed core to move toward or away from the fixed core, and the current supplied to the coil produces a magnetic attractive force for independently biasing the first and second plungers in accordance with the value of the current to independently actuate the first and second valve bodies.
1 Assignment
0 Petitions
Accused Products
Abstract
A control valve in a variable displacement compressor is disclosed. The compressor adjusts the discharge displacement based on control of the inclination of a swash plate located in a crank chamber. The compressor includes a supply passage for connecting a discharge chamber with the crank chamber to supply the gas from the discharge chamber to the crank chamber and a bleeding passage for connecting the crank chamber with a suction chamber to release the gas from the crank chamber to the suction chamber. The control valve includes a first valve mechanism for selectively opening and closing the supply passage, a second valve mechanism for adjusting the flow rate of the gas released from the crank chamber to the suction chamber through the bleeding passage, and a solenoid mechanism for actuating the first valve mechanism and the second valve mechanism. The first valve mechanism and the second valve mechanism operate independently. The first valve mechanism, the second valve mechanism and the solenoid mechanism are retained in a single housing.
69 Citations
18 Claims
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1. A control valve in a variable displacement compressor that adjusts the discharge displacement based on controlling inclination of a drive plate located in a crank chamber, wherein the compressor includes a piston operably coupled to the drive plate and located in a cylinder bore, wherein 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, wherein the inclination of the drive plate is variable based on the pressure in the crank chamber, wherein a supply passage connects the discharge chamber with the crank chamber to supply the gas from the discharge chamber to the crank chamber, and wherein a bleeding passage connects the crank chamber with the suction chamber to release the gas from the crank chamber to the suction chamber, the control valve comprising:
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a single housing; a first valve mechanism retained in the housing to selectively open and close the supply passage, wherein the first valve mechanism has a first valve hole defined in the housing to be located in the supply passage, a first valve body for selectively opening and closing the first valve hole, and a first plunger connected to the first valve body; a second valve mechanism retained in the housing to adjust the flow rate of the gas released from the crank chamber to the suction chamber through the bleeding passage, wherein the second valve mechanism has a second valve hole defined in the housing to be located in the bleeding passage, a second valve body for adjusting the opening size of the second valve hole, and a second plunger connected to the second valve body, wherein the first valve mechanism and the second valve mechanism operate independently; and a single solenoid mechanism retained in the housing, wherein the solenoid mechanism is selectively excited and de-excited based on a supply of current to independently actuate the first valve mechanism and the second valve mechanism, wherein the solenoid mechanism has a fixed core and a coil, the first plunger and the second plunger are adjacent to the fixed core to move toward or away from the fixed core, and the current supplied to the coil produces a magnetic attractive force for independently biasing the first and second plungers in accordance with the value of the current to independently actuate the first and second valve bodies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A control valve in a variable displacement compressor that adjusts the discharge displacement based on control of an inclination of a drive plate located in a crank chamber, wherein the inclination of the drive plate is variable based on the pressure in the crank chamber, wherein the compressor includes a piston operably coupled to the drive plate and located in a cylinder bore such that 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, a supply passage from connecting the discharge chamber with the crank chamber to supply the gas from the discharge chamber to the crank chamber, and a bleeding passage for connecting the crank chamber with the suction chamber to release the gas from the crank chamber to the suction chamber, the control valve comprising:
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a housing; a first valve mechanism located in the housing to selectively open and close the supply passage, wherein the first valve mechanism has a first valve hole defined in the housing and located in the supply passage, a first valve body for selectively opening and closing the first valve hole and a first plunger connected to the first valve body; a second valve mechanism located in the housing to adjust the flow rate of the gas released from the crank chamber to the suction chamber through the bleeding passage, wherein the second valve mechanism has a second valve hole defined in the housing and located in the bleeding passage, a second valve body for adjusting the opening size of the second valve hole, a second plunger connected to the second valve body, and a pressure sensing member for moving the second valve body in accordance with the pressure of the gas supplied to the compressor, wherein the first valve mechanism and the second valve mechanism operate independently; and a solenoid mechanism located in the housing, wherein the solenoid mechanism is selectively excited and de-excited based on a supply of electric current to independently actuate the first valve body and the second valve body, wherein the solenoid mechanism has a fixed core and a coil, wherein the first plunger and the second plunger are adjacent to the fixed core to move toward or away from the fixed core, and wherein the current supplied to the coil produces a magnetic attractive force for independently biasing the first and second plungers in accordance with the value of the current to independently actuate the first and second valve bodies. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification