Variable-type swash plate compressor having a cock member for fixed capacity operation and manufacturing method therefor
AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsManabu Sugiura, Takahiro Hoshida
Life of this patent
Estimating the term…
Abstract
A fixed capacity swash plate type compressor permits cost reduction by using components and assembly steps common to those of a variable capacity swash plate type compressor. In place of a capacity control valve assembly that controls the opening of at least one of a refrigerant gas supplying passage and a bleed passage to adjust a crank chamber pressure, a cock member that maintains communication between a crank chamber area and a suction pressure area to disable capacity control while the compressor is in operation is installed in a compartment of the capacity control valve assembly in the variable capacity swash plate type compressor.
Claims8
A fixed capacity swash plate type compressor comprising:
- a cylinder block provided with a plurality of cylinder bores extending axially therein;
- a front housing which forms a crank chamber between itself and the cylinder block to close a front end of the cylinder block;
- a rear housing which closes a rear end of the cylinder block and which defines a discharge chamber and a suction chamber therein;
- a housing assembly composed of the cylinder block, the front housing, and the rear housing;
- a drive shaft rotatably supported by the housing assembly;
- a swash plate which rotates integrally with the drive shaft and which is provided such that an inclination thereof can be changed in accordance with a crank chamber pressure;
- pistons which reciprocate in the cylinder bores in cooperation with the swash plate;
- a refrigerant gas supplying passage which allows communication between a crank chamber area and a discharge pressure area;
- a bleed passage which allows communication between a crank chamber area and a suction pressure area;
- a compartment which is formed in the housing assembly to be able to accommodate a capacity control valve assembly that controls the opening of at least one of the communication between the crank chamber area and the discharge pressure area and the communication between the crank chamber area and the suction pressure area so as to adjust a crank chamber pressure;
- and
- a cock member which is disposed in the compartment to replace the capacity control valve assembly and which maintains continuous communication between the crank chamber area and the suction pressure area to disable capacity control while the compressor is in operation.
A manufacturing method for a fixed capacity swash plate type compressor, wherein the swash plate type compressor comprises:
- a cylinder block provided with a plurality of cylinder bores extending axially therein;
- a front housing which forms a crank chamber between itself and the cylinder block to close a front end of the cylinder block;
- a rear housing which closes a rear end of the cylinder block and which defines a discharge chamber and a suction chamber therein;
- a housing assembly composed of the cylinder block, the front housing, and the rear housing;
- a drive shaft rotatably supported by the housing assembly;
- a swash plate which rotates integrally with the drive shaft and which is provided such that an inclination thereof can be changed in accordance with a pressure in the crank chamber;
- pistons which reciprocate in the cylinder bores in cooperation with the swash plate;
- a refrigerant gas supplying passage which allows communication between a crank chamber area and a discharge pressure area;
- a bleed passage which allows communication between the crank chamber area and a suction pressure area;
- and
- the manufacturing method comprising the steps of:
- forming a compartment in the housing assembly so as to be able to selectively accommodate either a capacity control valve assembly that controls the opening of at least one of the communication between the crank chamber area and the discharge pressure area and the communication between the crank chamber area and the suction pressure area so as to adjust a crank chamber pressure or a cock member which can maintain continuous communication between the crank chamber area and the suction pressure area to disable capacity control while the compressor is in operation;
- and
- installing the cock assembly in the compartment in place of a capacity control valve assembly.
Dependencies are inferred from the claim text.