Abstract:
Variable displacement compressor is provided with a displacement control valve (2) that can change an opening degree of supplying passage (44, 46) between a valve seat (VS) and a valve body (VB), thereby changing the pressure in a crank chamber (9). The displacement control valve (2) is accommodated within a control valve chamber (5c) in a rear housing (5) and fixed in place by means of a circlip (50). A cutout (50g) is formed between the displacement control valve (2) and the circlip (50) and/or between the circlip (50) and the rear housing (5). A clearance (C) formed by the cutout (50g) and the like inhibits the transmission of vibrations caused by impacts between the valve seat (VS) and the valve body (VB). This makes the variable displacement compressor quiet, reduces costs by obviating the need for additional components, and results in excellent durability.
Abstract:
A compressor including a hollow housing having a suction chamber, a discharge chamber, and a crank chamber formed therein. A first fluid flow path provided within the compressor facilitates a flow of the working fluid from the crank chamber to the suction chamber. A second fluid flow path provided within the compressor facilitates a flow of a mixture of the working fluid and a lubricating fluid from the crank chamber to the suction chamber, wherein the second fluid flow path is selectively opened and closed by an annular sleeve.
Abstract:
A compressor comprises a suction passage; an oil reservoir for storing a lubricating oil which is separated from a refrigerant gas having a discharge pressure; and a throttle valve provided in the suction passage and having a valve body for adjusting an opening degree of the suction passage based on a differential pressure applied to the valve body. The suction passage has an upstream suction passage which is located upstream of the throttle valve. The compressor comprises a lubricating oil passage connecting the oil reservoir to the upstream suction passage for the lubricating oil in the oil reservoir to flow to the upstream suction passage therethrough.
Abstract:
To provide a control valve for a variable displacement compressor, which is capable of stably operating in a pressure control area, and causing the compressor to quickly shift to operation with the minimum displacement. The control valve for a variable displacement compressor is capable of realizing stable pressure control, since a force applied to a valve element in a valve-closing direction increases when the valve element is in a pressure control area, and is balanced with a force applied to the valve element in a valve-opening direction by the pressure of refrigerant. Further, when the valve element moves past an end point of the pressure control area, the force applied to the valve element in the valve-closing direction decreases to thereby increase the valve-opening degree of a valve portion when the valve portion is fully open. Therefore, when a solenoid is not energized, it is possible to ensure a sufficient flow rate of refrigerant, thereby making it possible to cause the compressor to quickly shift to operation with the minimum displacement.
Abstract:
A scroll compressor (10) includes a lubrication part (70) provided at a sliding part between a cylindrical part (26) of a slide bush (25) and an extension (53) of a movable scroll (50). The lubrication part (70) has a coating formed on the surface of an iron substrate and the coating is made of a composition for a sliding element containing polytetrafluoroethylene, 300 parts by weight of polyamide-imide resin per 100 parts by weight of polytetrafluoroethylene and 100 parts by weight of calcium fluoride as a wear resistant agent per 100 parts by weight of polytetrafluoroethylene.
Abstract:
The present invention is directed to provide a device for reducing pulsation in a variable displacement compressor. The compressor is connected to an external refrigerant circuit. The device for reducing pulsation includes a flow passage and a control valve. The control valve includes a valve housing, a spool valve and a damper chamber. The spool valve has formed therethrough a flow hole. The damper chamber communicates with the flow passage adjacent to the external refrigerant circuit through the flow hole. Effective cross-sectional area and effective length of the flow hole are determined based on frequency of a specific pulsation of the refrigerant gas and volume of the damper chamber at the time of the development of the specific pulsation in such a manner that the specific pulsation is developed, resonance effect of a Helmholtz resonator takes place in the damper chamber.
Abstract:
A system for lubricating a crankshaft lip seal having wear surfaces with a lubricant used with the crankshaft. The system includes a compressor housing portion, wherein the lip seal secured in the compressor housing portion for engagement with the crankshaft and a structure in the compressor housing portion for adequately providing lubricant to the lip seal surfaces. In a preferred embodiment the structure includes a bore having a reservoir for maintaining the lubricant in contact with the lip seal and a manner for controlling the amount of the lubricant in the reservoir.
Abstract:
An air-conditioning compressor for air conditioning systems, especially for motor vehicles, or an air conditioning system comprising an air-conditioning compressor. The air-conditioning compressor is connected to a high-pressure zone and a suction pressure zone. Driving chamber pressure is redirected from the driving chamber of the air-conditioning compressor, i.e. from the high-pressure zone of the driving chamber to the suction pressure zone, if necessary while a filter, particularly a dirt particle filter, is optionally located in the suction pressure zone.
Abstract:
A coat of material impermeable to coolant gas is formed on the surface of a sealing member of a compressor for absorbing and compressing the coolant gas.
Abstract:
A displacement control mechanism for a variable displacement compressor includes a first valve hole, a first valve body, a pressure sensing means operable to sense pressures of first and second points in a discharge pressure region to adjust a position of the first valve body, and a pressure-difference-increasing means operable to increase pressure difference between the first and second points when the pressure of a suction pressure region falls below a predetermined standard pressure. The pressure sensing means displaces the first valve body to increase an opening degree of the first valve hole according to increase of the pressure difference when the first valve hole is part of a supply passage. The pressure sensing means displaces the first valve body to decrease the opening degree of the first valve hole according to the increase of the pressure difference when the first valve hole is part of a bleed passage.