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US 5,971,716 AGranted
Variable displacement compressor having a muffler and a capacity control valve mounted thereto
AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsMasaki Ota, Masaru Hamasaki, Youichi Okadome, Hisakazu Kobayashi
Life of this patent
Estimating the term…
Abstract
A variable displacement compressor includes a compressor body (10) for compressing gas introduced from an external circuit (65) and discharging the compressed gas to the external circuit (65). A muffler (17, 23) is located between the compressor body (10) and the external circuit (65) for preventing pulsation caused by compressing gas in the compressor body (10). A displacement control valve (20) is provided for controlling the displacement of the compressor body (10). The displacement control valve (20) is mounted on a cover (18, 24) attached to the muffler (17, 23).
Claims19
A variable displacement compressor to be used with a refrigeration circuit comprising:
- a body for compressing gas drawn from the refrigeration circuit and for discharging compressed gas to the refrigeration circuit;
- the body defining a suction chamber through which gas is drawn from the refrigeration circuit into the body and a discharge chamber through which compressed gas is discharged from the body to the refrigeration circuit;
- a muffler on the body for connection to the refrigeration circuit, the muffler being in flow communication with one of the suction chamber and the discharge chamber for reducing pulsation of the gas, the muffler having a cover connected to the muffler;
- and
- a displacement control valve for controlling displacement of the compressor, wherein the displacement control valve is mounted on the muffler cover.
2 more elements
A variable displacement compressor to be used with a refrigeration circuit comprising:
- a body for compressing gas drawn from the refrigeration circuit and for discharging compressed gas to the refrigeration circuit;
- a muffler on the body for connection to the refrigeration circuit for reducing pulsation of the gas, the muffler having an exterior opening that opens to the exterior of the body, wherein the exterior opening is covered by a separate cover connected to the muffler;
- a displacement control valve for controlling displacement of the compressor, wherein the displacement control valve is mounted on the muffler cover;
- a crank chamber defined by the body;
- a rotatable shaft passing through the crank chamber;
- an inclinable drive plate located in the crank chamber and mounted on the rotatable shaft, wherein the inclination of the drive plate with respect to the axis of the rotatable shaft is variable;
- a cylinder bore defined in the body;
- a piston operably connected to the drive plate and located in the cylinder bore;
- a suction chamber defined in the body through which gas is drawn by the piston into the compressor;
- and
- a discharge chamber defined in the body through which gas is discharged from the compressor, wherein the inclination of the drive plate with respect to the rotatable shaft is varied based on the difference between the pressure in the suction chamber and the pressure in the crank chamber, and the stroke of the piston changes in accordance with the change in the inclination of the drive plate, thus varying the displacement of the compressor;
- the muffler being in flow communication with at least one of the suction chamber and the discharge chamber.
9 more elements
A variable displacement compressor to be used with a refrigeration circuit comprising:
- a body for compressing gas drawn from the refrigeration circuit and for discharging compressed gas to the refrigeration circuit;
- a crank chamber defined by the body;
- a rotatable shaft passing through the crank chamber;
- an inclinable drive plate located in the crank chamber and mounted on the rotatable shaft, wherein the inclination of the drive plate with respect to the axis of the rotatable shaft is variable;
- a cylinder bore defined in the body;
- a piston operably connected to the drive plate and located in the cylinder bore;
- a suction chamber defined in the body through which gas is drawn by the piston into the compressor;
- a discharge chamber defined in the body through which gas is discharged from the compressor, wherein the inclination of the drive plate with respect to the rotatable shaft is varied based on the difference between the pressure in the suction chamber and the pressure in the crank chamber, and wherein the stroke of the piston changes in accordance with the change in the inclination of the drive plate, thus varying the displacement of the compressor;
- a discharge muffler connected to the discharge chamber and for connection to the refrigeration circuit for reducing pulsation of the gas, the discharge muffler having an exterior opening that opens to the exterior of the body;
- a suction muffler connected to the suction chamber and for connection to the refrigeration ciruit for reducing pulsation of the gas, the suction muffler having an exterior opening that opens to the exterior of the body;
- a pair of muffler covers, each having a port for connecting the refrigeration circuit thereto, one muffler cover covering the discharge muffler opening and the other covering the suction muffler opening;
- and
- a displacement control valve for controlling displacement of the compressor, wherein the displacement control valve is mounted on one of the muffler covers.
10 more elements
Dependencies are inferred from the claim text.