The present invention relates to a compressor, which includes a main refrigerant supply channel for supplying refrigerant by passing through the inside of a driving shaft and an auxiliary refrigerant supply channel for supplying refrigerant by passing through a suction chamber of front and rear housings and a slot of the driving shaft after passing through cylinder blocks in order to supply the refrigerant inhaled into a swash plate chamber to cylinder bores, thereby enhancing performance and lubricating ability of a driving shaft seal area since the refrigerant of the swash plate chamber can be used effectively.
1. A compressor comprising:
a driving shaft to which a swash plate rotating in a swash plate chamber inside the compressor is inclinedly combined;
front and rear cylinder blocks respectively having shaft support holes to which the driving shaft is rotatably mounted, and a plurality of the cylinder bores formed at both sides of the swash plate chamber;
a plurality of pistons mounted on the outer periphery of the swash plate in such a manner as to interpose a shoe between the piston and the swash plate, for performing a reciprocating motion inside the cylinder bores while cooperating with the rotation of the swash plate;
front and rear housings coupled with both sides of the front and rear cylinder blocks and respectively having suction chambers and discharge chambers formed therein;
valve units interposed between the front and rear cylinder blocks and the front and rear housings; and
a main refrigerant supply channel having a flow channel formed inside the driving shaft and suction passageways respectively formed in the front and rear cylinder blocks for fluidically communicating the shaft support holes and the cylinder bores with each other, the flow channel having an inlet located at the swash plate chamber and outlets respectively located at the shaft support holes of the front and rear cylinder blocks, whereby refrigerant inhaled in to the swash plate chamber from the outside can be supplied into the cylinder bores in order during the rotation of the driving shaft,
wherein an auxiliary refrigerant supply channel has a communication hole formed in at least one of the front and rear cylinder blocks and for fluidically communicating the swash plate chamber with the corresponding suction chamber of the suction chambers of the front and rear housings, and at least one slot formed in the driving shaft for fluidically communicating the outlets of the flow channel with the suction chambers.
2. The compressor according to claim 1 , wherein the inlet of the flow channel is formed by perforating a side of a hub of the swash plate and a side of the driving shaft to be fluidically communicated with the swash plate chamber, and the outlets are fluidically communicated with the suction passageways of the front and rear cylinder blocks.
3. The compressor according to claim 1 , wherein the slot is axially formed at a side of the outlet of the flow channel, in such manner as to be lopsidedly formed at the side of the outlet which starts to be fluidically communicated with the suction passageways during the rotation of the driving shaft.
4. The compressor according to claim 1 , wherein at a side of cylinder blocks where the communication holes are formed communication paths for fluidically communicating the communication holes with the corresponding one of the suction chambers are also formed.
5. The compressor according to claim 1 , wherein the suction chamber of the front housing is partitioned by a sealing member of the driving shaft and is a driving shaft inserting space where the driving shaft is rotatably mounted.