Compressor of Vehicle's Cooling System

Abstract

A compressor of the vehicle's cooling system is configured such that an external refrigerant is introduced into a shaft in a radial direction through a body, flows in the shaft in an axial direction, and then is discharged to a refrigerant compression space in the body, thereby shortening the flow path of the refrigerant and minimizing flow path resistance. Moreover, since no suction valves and suction chambers are required, the structure is simplified and the cost is reduced.

1 . A compressor of a vehicle's cooling system comprising:
 a body formed to introduce a refrigerant from the outside in a radial direction thereof; and   a shaft rotatably coupled to the body and formed such that the refrigerant introduced into the body enters into the shaft in the radial direction thereof, flows in an axial direction thereof, and then exits in the radial direction thereof toward a refrigerant compression space formed in the body.   
   
   
       2 . The compressor of  claim 1 , wherein a body refrigerant inlet hole is formed on a circumferential surface of the body so as to introduce the refrigerant from the outside into the shaft in the radial direction of the body. 
   
   
       3 . The compressor of  claim 1 , wherein a refrigerant flow path is formed in the shaft so as to move the refrigerant in the axial direction thereof. 
   
   
       4 . The compressor of  claim 1 , wherein at least a portion of the shaft is formed in a hollow shape, one end of which is closed. 
   
   
       5 . The compressor of  claim 1 , wherein shaft refrigerant inlet holes for allowing the refrigerant introduced into the body to enter into the shaft and shaft refrigerant outlet holes for discharging the refrigerant introduced to the inside of the shaft to the refrigerant compression space of the body are respectively formed on a circumferential surface of the shaft in the radial direction thereof. 
   
   
       6 . The compressor of  claim 5 , wherein the shaft refrigerant inlet holes and the shaft refrigerant outlet holes are spaced with a predetermined angle therebetween in a rotational direction of the shaft. 
   
   
       7 . The compressor of  claim 5 , wherein the shaft refrigerant inlet holes are formed substantially in a middle portion of the shaft and the shaft refrigerant outlet holes are disposed at forward and rearward sides from the shaft refrigerant inlet holes. 
   
   
       8 . The compressor of  claim 5 , wherein the shaft refrigerant inlet holes and the shaft refrigerant outlet holes are formed in plural number, respectively. 
   
   
       9 . The compressor of  claim 5 , wherein a first boss portion to which the shaft is axially coupled is formed at a central portion of the body, and body refrigerant outlet holes communicating with the shaft refrigerant outlet holes and for discharging the refrigerant coming from the shaft to the refrigerant compression space are formed in a second boss portion of the body. 
   
   
       10 . The compressor of  claim 9 , wherein the body refrigerant outlet holes are formed in a direction inclined at a predetermined angle from a longitudinal axis of the shaft toward the distal ends of the body. 
   
   
       11 . The compressor of  claim 1 , wherein front and rear surfaces of the refrigerant compression space of the body are respectively opened, and front and rear heads for guiding the compressed refrigerant coming from the refrigerant compression space to the outside are coupled to the opened front and rear surfaces respectively. 
   
   
       12 . The compressor of  claim 11 , wherein discharge valves for controlling discharge of the refrigerant are installed between the refrigerant compression space and the front and rear heads. 
   
   
       13 . The compressor of  claim 1 , wherein a swash plate is axially coupled to the shaft, and a swash plate refrigerant inlet hole communicating with the shaft refrigerant inlet holes is formed on the swash plate so as to guide the refrigerant introduced into the body to the shaft. 
   
   
       14 . The compressor of  claim 13 , wherein the shaft refrigerant inlet holes and the swash plate refrigerant inlet hole are disposed on a straight line in the radial direction of the shaft. 
   
   
       15 . The compressor of  claim 13 , wherein the swash plate comprises a first boss portion axially coupled to the shaft and a disc portion formed in a circumferential direction of the first boss portion and disposed at an inclination inside the body, and the swash plate refrigerant inlet hole is formed in the first boss portion. 
   
   
       16 . The compressor of  claim 14 , wherein a piston for compressing the refrigerant in the refrigerant compression space while moving back and forth according to rotation of the shaft is coupled to the disc portion of the swash plate. 
   
   
       17 . The compressor of  claim 5 , wherein at least a portion of the shaft is formed in a hollow shape, of which one end is closed and an additional inlet hole for guiding the refrigerant not introduced to the shaft refrigerant inlet holes is formed at the other end of the shaft. 
   
   
       18 . A compressor of a vehicle's cooling system comprising:
 a body having a body refrigerant inlet hole formed therein to introduce a refrigerant from the outside in a radial direction thereof;   a shaft rotatably disposed in the body and having shaft refrigerant inlet holes and shaft refrigerant outlet holes, the shaft refrigerant inlet holes for introducing the refrigerant introduced via the body refrigerant inlet hole and the shaft refrigerant outlet holes for discharging the refrigerant introduced to the inside of the shaft toward a refrigerant compression space formed in the body in a radial direction of the shaft;   a swash plate axially coupled to the shaft and having a swash plate refrigerant inlet hole communicating with the shaft refrigerant inlet hole;   a piston coupled to one side of the swash plate and linearly reciprocating in the body during rotation of the shaft; and   front and rear heads respectively installed on opened front and rear surfaces of the body and for discharging the compressed refrigerant coming from the refrigerant compression space to the outside.   
   
   
       19 . The compressor of  claim 18 , wherein a refrigerant flow path is formed in the shaft so as to move the refrigerant in an axial direction thereof. 
   
   
       20 . The compressor of  claim 18 , wherein body refrigerant outlet holes communicating with the shaft refrigerant outlet holes are formed in the body for discharging the refrigerant coming from the shaft to the refrigerant compression space.