Variable Capacity Compressor

Abstract

Lubricating performance and durability of a variable capacity compressor are secured. A first communication hole 202 is formed to be close to a penetration bolt 201 a at an upstream side in a rotational direction, the penetration bolt 201 a is disposed outside a rotation trajectory of a rotating member such as a swash plate in a front housing 101, and a second communication hole is formed to be close to an upper penetration bolt 201 b at a downstream side in a rotational direction. The first and second communication holes are formed by penetrating a peripheral wall of the front housing 101, a storage chamber 206 storing oil in refrigerant is arranged outside the front housing 101 by communicating with an inner space of the front housing 101 through the communication holes, and while refrigerant in the storage chamber 206 is returned to the inner space from the second communication hole 203, oil in refrigerant received by contacting an upstream side of a first penetration bolt 201 a is stored in the storage chamber 206 from the first communication hole 202, and as a result, as a rotational speed is increased, a storage amount is increased.

1 . A variable capacity compressor including a cylindrical receiving member, a rotating member rotated in a non-horizontal surface around a center shaft of the cylindrical receiving member, a plurality of pistons suctioning and discharging refrigerant by reciprocating axially in parallel to the center shaft in a plurality of cylinders formed on an outer periphery of a center shaft of the cylindrical receiving member, a motion direction conversion mechanism converting a rotation motion of the rotating member into reciprocation of the piston, and a control mechanism controlling a refrigerant discharge amount by controlling a conversion amount of reciprocation of the piston to a rotation amount of the rotating member in the motion direction conversion mechanism, the variable capacity compressor comprising:
 an oil receiving unit arranged outside a rotation trajectory of the rotating member while being positioned in an inner space receiving the rotating member of the cylindrical receiving member to receive oil in the refrigerant on which centrifugal force acts;   a plurality of communication holes including a first communication hole that is formed to penetrate through the cylindrical receiving member and be close to the oil receiving unit at an upstream side in a rotational direction of the rotating member and a second communication hole spaced apart from the first communication hole in the rotational direction; and   a storage chamber formed outside the cylindrical receiving member so as to communicate with the inner space of the cylindrical receiving member through the plurality of communication holes, and the oil in the refrigerant being received.   
     
     
         2 . The variable capacity compressor according to  claim 1 , wherein the variable capacity compressor is driven by a driving source of a vehicle with the center shaft of the cylindrical receiving member arranged substantially in a horizontal direction. 
     
     
         3 . The variable capacity compressor according to  claim 1 , wherein the first communication hole is arranged in a lower part of the storage chamber and the second communication hole is arranged in an upper part of the storage chamber. 
     
     
         4 . The variable capacity compressor according to  claim 1 , wherein the cylindrical receiving member is axially separated into a plurality of members and the oil receiving unit is each intermediate portion of a plurality of penetration bolts around the center shaft to join the plurality of cylindrical receiving members which is separated, the intermediate portion being exposed to the inner space of the cylindrical receiving member. 
     
     
         5 . The variable capacity compressor according to  claim 4 , wherein the storage chamber is arranged at a side in which the rotating member is rotated from the top to the bottom, the first communication hole is arranged to be close to the penetration bolt at the upstream side in the rotational direction, the penetration bolt being close to the lower part of the storage chamber, and the second communication hole is arranged above the first communication hole to be close to an additional penetration bolt at the downstream side in the rotational direction, the additional penetration bolt being close to the upper part of the storage chamber. 
     
     
         6 . The variable capacity compressor according to  claim 4 , wherein the storage chamber is arranged at a side in which the rotating member is rotated from the bottom to the top, the first communication hole is arranged below a penetration bolt disposed at a vertical middle portion in the lower part of the storage chamber, and the second communication hole is arranged above the same penetration bolt. 
     
     
         7 . The variable capacity compressor according to  claim 4 , wherein the storage chamber is arranged at the side in which the rotating member is rotated from the bottom to the top, the first communication hole is arranged to be close to the penetration bolt at the upstream side in the rotational direction, the penetration bolt being close to the upper part of the storage chamber, and the second communication hole is arranged below the first communication hole to be close to an additional penetration bolt at the downstream side in the rotational direction, the additional penetration bolt being close to the lower part of the storage chamber. 
     
     
         8 . The variable capacity compressor according to  claim 1 , wherein the rotating member is connected to the driving shaft with a rotation surface being inclined, the control mechanism controls a conversion amount of reciprocation of the piston to a rotation amount of the rotating member in the motion direction conversion mechanism by controlling an inclination angle of the rotation surface of the rotating member to control a refrigerant discharge amount. 
     
     
         9 . The variable capacity compressor according to  claim 8 , wherein the motion direction conversion mechanism converts a rotating motion of the rotating member into reciprocation of the piston through a swing plate which is swung by the rotating motion, and the oil receiving unit is configured by a guide plate arranged on an inner wall of the cylindrical receiving member so as to be swung while preventing rotation of the swing plate. 
     
     
         10 . The variable capacity compressor according to  claim 1 , wherein the storage chamber communicates with a suction chamber for drawing refrigerant into the cylinder.