KR20080009361A - Compressor - Google Patents

Abstract

A compressor is provided to divide a space formed in a rear housing by a valve unit and utilize the divided space as an auxiliary discharge chamber to reduce an area of a refrigerant discharge chamber, thereby reducing a discharge pulsation pressure. A driving shaft(150) is combined with a swash plate(160) rotating in a swash plate chamber(136) in a compressor(100), having a passage(151) for moving refrigerant sucked into the swash plate chamber to cylinder bores(131,141). Cylinder blocks(130,140) have the driving shaft installed at shaft support holes(133,143) rotatably, the plurality of cylinder bores formed at both sides of the swash plate chamber, and suction paths(132,142) connecting the shaft support holes with the cylinder bores to suck the refrigerant into each cylinder bore. A plurality of pistons(170) are mounted at an outer periphery of the swash plate by interposing a shoe(165), and reciprocate in the cylinder bores, interacting with rotation of the swash plate. Front and rear housings(110,120) are combined with both sides of the cylinder blocks, having discharge chambers(111,121) inside. A suction port is formed at an outer surface of the cylinder block for being connected with the swash plate to supply external refrigerant to the swash plate chamber. A discharge port(147) is connected with the discharge chambers to discharge refrigerant of the discharge chambers of the front and rear housings to the outside. Valve units(180) are interposed between the cylinder blocks and the front and rear housings. An auxiliary discharge chamber(201) is formed by dividing a space formed in the rear housing by the valve unit correspondingly to a rear end of the driving shaft. A connecting element(202) is formed at a partition wall of the rear housing for connecting the discharge chamber of the rear housing with the auxiliary discharge chamber.

Description

Compressor {COMPRESSOR}

1 is a cross-sectional view showing a conventional compressor.

2 is a cross-sectional view taken along the line A-A in FIG.

3 is an exploded perspective view showing a compressor according to the present invention.

4 is a sectional view of a compressor according to the present invention;

5 is a perspective view showing a state in which the drive shaft and the swash plate are disassembled in the compressor according to the present invention.

<Description of Signs of Major Parts of Drawings>

100: compressor 110: front housing

111,121: discharge chamber 112,122: fixing hole

113,123: Bolted hole 120: Rear housing

130: front cylinder block 131,141: cylinder bore

132,142: suction passage 133,143: shaft support hole

134,144: discharge passage 135,145: muffler

136: swash chamber 140: rear cylinder block

146: suction port 147: discharge port

150: drive shaft 151: flow path

152: entrance 153: exit

160: Saphan 161: Hub

165: shoe 170: piston

180: valve unit 181: valve plate

181a: refrigerant discharge hole 181b: communication path

182: discharge lead valve 182a: valve plate

183: fixing pin 190: bolt

200: boss 201: auxiliary muffler

202: communication means

The present invention relates to a compressor, and more particularly, in the structure in which the refrigerant introduced from the swash plate chamber is uniformly sucked into the cylinder bore through the hollow drive shaft, it is possible to form a separate muffler space having a large flow path cross section outside the compressor. By utilizing the dead space formed in the center of the rear housing as an auxiliary discharge chamber, it is possible to compact the package of the compressor and to effectively reduce the pulsating pressure by increasing the refrigerant discharge chamber area on the same compressor package. The present invention relates to a compressor that can.

Typically, a compressor for automobiles sucks refrigerant gas discharged after evaporation is completed and converts the refrigerant gas into a refrigerant gas in a high temperature and high pressure state that is easily liquefied and discharged into a condenser.

There are various kinds of such compressors, such as a swash plate type compressor in which a piston reciprocates by the rotation of an inclined swash plate, a scroll compressor compressed by a rotational motion of two scrolls, and a rotary compressor compressed by a rotary vane. .

Among these, the reciprocating compressor that compresses the refrigerant according to the reciprocating motion of the piston includes crank type and wobble plate type in addition to the swash plate type compressor, and the swash plate type compressor also has a fixed capacity swash plate type compressor and a variable capacity type according to the use. And swash plate compressors.

1 and 2 is a view showing a conventional fixed-capacity swash plate type compressor, briefly described with reference to the following.

As shown, the swash plate compressor 1 is coupled to the front housing 10, the front cylinder block 20 is built, the rear housing is coupled to the front housing 10 and the rear cylinder block 20a ( 10a).

Inside the front and rear housings 10 and 10a, the discharge chamber 12 and the suction are respectively provided inside and outside of the partition wall 13 in correspondence with the refrigerant discharge hole and the refrigerant suction hole of the valve plate 61 to be described below. The yarn 11 is formed.

Here, the discharge chamber 12 is formed in the first discharge chamber 12a formed inside the partition 13, and formed outside the partition 13 so as to be partitioned from the suction chamber 11 and the first discharge chamber 12a. ) And a second discharge chamber 12b communicating through the discharge hole 12c.

That is, when the refrigerant in the first discharge chamber 12a passes through the discharge hole 12c having the small diameter, the refrigerant is reduced and enlarged when the refrigerant moves to the second discharge chamber 12b. The pulsation pressure drops to reduce vibration and noise.

On the other hand, a plurality of bolted fastening holes 16 are formed in the circumferential direction of the suction chamber 11. Through the bolt fastening hole 16, the front and rear housings 10 and 10a are fastened / fixed to the mutual bolts 80 in a state where a plurality of components are assembled therein.

The front and rear cylinder blocks 20 and 20a are provided with a plurality of cylinder bores 21 therein, and the cylinder bores 21 corresponding to each other of the front and rear cylinder blocks 20 and 20a are provided. The pistons 50 are coupled to the linear reciprocating motion as well as the pistons 50 are coupled to the outer circumference of the swash plate 40 inclined to the drive shaft 30 via the shoe 45.

Accordingly, the pistons 50 reciprocate inside the cylinder bore 21 of the front and rear cylinder blocks 20 and 20a in conjunction with the swash plate 40 rotating together with the drive shaft 30.

The valve unit 60 is installed between the front and rear housings 10 and 10a and the front and rear cylinder blocks 20 and 20a.

Here, the valve unit 60 is composed of a valve plate 61 having a refrigerant suction hole and a refrigerant discharge hole, and a suction lead valve 63 and a discharge lead valve 62 installed at both sides thereof.

The valve unit 60 is assembled between the front and rear housings 10 and 10a and the front and rear cylinder blocks 20 and 20a, respectively, in which fixing pins are formed on both sides of the valve plate 61. 65 is assembled in a fixed position while being inserted into the fixing hole 15 formed on the opposite surface of the front and rear housings 10 and 10a and the front and rear cylinder blocks 20 and 20a.

On the other hand, the front and rear cylinder block 20 (20) (so that the refrigerant supplied to the swash plate chamber 24 provided between the front and rear cylinder blocks 20, 20a can flow to each suction chamber 11 ( A plurality of suction passages 22 are formed in 20a, and the second discharge chamber 12b of the front and rear housings 10 and 10a is formed through the front and rear cylinder blocks 20 and 20a. It is communicated with each other by the connecting passage 23.

Therefore, the suction and compression of the refrigerant may be simultaneously performed in the bore 21 of the front and rear cylinder blocks 20 and 20a according to the reciprocating motion of the piston 50.

In addition, a shaft support hole 25 is formed at the center of the front and rear cylinder blocks 20 and 20a to support the drive shaft 30, and a needle roller bearing 26 is formed in the shaft support hole 25. It interposes and supports the said drive shaft 30 rotatably.

On the other hand, the upper portion of the outer side of the rear housing (10a) is supplied with the refrigerant transferred from the evaporator during the intake stroke of the piston 50 into the compressor (1), during the compression stroke of the piston 50 inside the compressor (1) The muffler 70 is formed to discharge the compressed refrigerant in the condenser.

Referring to the refrigerant circulation process of the compressor (1) configured as described above are as follows.

The refrigerant supplied from the evaporator is sucked into the suction part of the muffler 70 and then supplied to the swash plate chamber 24 between the front and rear cylinder blocks 20 and 20a through the refrigerant suction port 71. The refrigerant supplied to 24 flows into the suction chamber 11 of the front and rear housings 10 and 10a along the suction passage 22 formed in the front and rear cylinder blocks 20 and 20a. .

Thereafter, the suction lead valve 63 is opened during the suction stroke of the piston 50. At this time, the refrigerant in the suction chamber 11 is sucked into the cylinder bore 21 through the refrigerant suction hole of the valve plate. .

In addition, during the compression stroke of the piston 50, the refrigerant inside the cylinder bore 21 is compressed. In this case, the discharge lead valve 62 is opened, and the refrigerant passes through the refrigerant discharge hole of the valve plate. 10) to the first discharge chamber 12a of 10a.

Subsequently, the refrigerant flowing into the first discharge chamber 12a is discharged to the discharge portion of the muffler 70 through the refrigerant discharge port 72 of the muffler 70 through the second discharge chamber 12b and then to the condenser. It will be fluid.

Meanwhile, the refrigerant compressed in the cylinder bore 21 of the front cylinder block 20 is discharged to the first discharge chamber 12a of the front housing 10 and then flows to the second discharge chamber 12b. Along the connecting passage 23 formed in the front and rear cylinder blocks 20 and 20a, the second discharge chamber 12b of the rear housing 10a flows to the refrigerant discharge port 72 together with the refrigerant therein. Through the discharge portion of the muffler 70 is discharged.

However, the above-described conventional compressor 1 has a loss due to suction resistance caused by a complicated internal refrigerant flow path and a loss due to elastic resistance of the suction lead valve 63 when the valve unit 60 is opened and closed. As a result, the suction volume efficiency of the refrigerant is reduced.

On the other hand, a technique for reducing the loss caused by the elastic resistance of the suction lead valve 63 is disclosed in Korean Patent Publication No. 2003-47729 (name: lubrication structure in a fixed capacity piston compressor). That is, the above technique applies a suction shaft integrated suction shaft valve without a suction lead valve, and forms a suction chamber in the rear housing corresponding to the rear end of the driving shaft in order to reduce the loss caused by the suction resistance. The suction chamber allows the cylinder bore to directly pass through the inside of the drive shaft from behind the drive shaft.

In addition, in the domestic patent application No. 2005-74185 filed previously by the applicant of the present invention, the cylinder bore formed in the cylinder block the refrigerant sucked into the compressor inside the drive shaft in which the swash plate rotating in the swash plate chamber is inclined It has been disclosed a compressor having a structure in which a flow path is formed so as to move to a side, and an inlet and an outlet are spaced apart from both sides of the flow path.

Here, the inlet of the flow passage is formed through one side of the hub and the drive shaft of the swash plate, or formed in opposite directions on both sides of the drive shaft. In the latter case, one inlet is formed at a position spaced apart from each other so as not to face the other inlet.

In addition, the outlet of the flow path is formed so as to communicate with the suction passage of each cylinder bore, the cylinder bore provided on both sides of the swash plate chamber during rotation of the drive shaft is formed on both sides of the drive shaft in opposite directions to each other at the same time so as to suck the refrigerant It is.

However, in the case of Korean Patent Publication No. 2003-47729, although the suction chamber, which is a space formed in the center of the rear housing, is used as the refrigerant suction region, as in the Korean Patent Application No. 2005-74185, the refrigerant is located in the center of the drive shaft. In the compressor of the structure sucked through the space there was a point that does not function very much.

In addition, the conventional techniques have a limitation in reducing the pulsating pressure as the refrigerant is discharged directly to the outside of the compressor through the discharge chamber formed in the rear housing, and in order to solve this problem, a separate muffler space having a large flow path area outside the compressor may be formed. In this case, the size of the compressor package was inevitably increased.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and in the structure in which the refrigerant introduced from the swash chamber is uniformly sucked into the cylinder bore through the hollow drive shaft, a separate muffler having a large flow path cross section outside the compressor. By using the dead space formed in the center of the rear housing as an auxiliary discharge chamber without forming a space, it is possible to compact the package of the compressor and increase the area of the refrigerant discharge chamber on the same compressor package to effectively reduce the pulsating pressure. It is an object to provide a compressor that can be exerted.

The present invention for achieving the above object is a swash plate rotating in the swash plate chamber in the compressor is inclined, the drive shaft formed therein to allow the refrigerant sucked into the swash plate chamber to move through the swash plate to the cylinder bore; The drive shaft is rotatably installed in the shaft paper, and a plurality of cylinder bores are formed on both sides of the swash plate chamber, so that the refrigerant sucked into the flow path of the drive shaft can be sequentially sucked into each cylinder bore when the drive shaft is rotated. A cylinder block having a suction passage communicating the shaft support hole with each cylinder bore; A plurality of pistons mounted on an outer circumference of the swash plate and reciprocating in the cylinder bore in conjunction with a rotational movement of the swash plate; Front and rear housings coupled to both sides of the cylinder block and having discharge chambers formed therein; A suction port formed on an outer surface of the cylinder block to communicate with the swash plate chamber to supply external refrigerant to the swash plate chamber, and a discharge port communicating with the discharge chamber to discharge the refrigerant in the discharge chambers of the front and rear housings to the outside; port; A valve unit interposed between the cylinder block and the front and rear housings, respectively; An auxiliary discharge chamber that is formed by separating the space formed in the rear housing corresponding to the rear end of the drive shaft by the valve unit; And a communication means formed on the partition wall of the rear housing to communicate the discharge chamber of the rear housing and the auxiliary discharge chamber with each other.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Repeated description of the same construction and operation as in the prior art will be omitted.

3 is an exploded perspective view showing a compressor according to the present invention, Figure 4 is a cross-sectional view showing a compressor according to the present invention, Figure 5 is a perspective view showing a state in which the drive shaft and the swash plate in the compressor according to the present invention.

The present invention employs a structure of a compressor capable of allowing the refrigerant supplied to the swash plate chamber to be directly sucked into the cylinder bore through the hollow drive shaft.

According to the compressor having such a structure, the internal flow path structure of the compressor is simplified by forming a flow path inside the drive shaft to directly suck the refrigerant supplied to the swash chamber into the cylinder bore through the flow path as the drive shaft rotates. By eliminating the loss caused by the loss and the suction lead valve, the loss due to the elastic resistance is reduced, and the suction volume efficiency of the refrigerant is improved, and the refrigerant efficiency can be improved by uniformly distributing the refrigerant to each cylinder bore on both sides of the swash chamber. have.

The present invention adopts the structure of such a compressor, the pulsation pressure in multiple stages for the refrigerant discharged from the discharge chamber toward the discharge muffler by utilizing the dead space formed in the rear housing corresponding to the rear end of the drive shaft as an auxiliary discharge chamber. It is to improve the performance of the compressor by reducing the pulsation noise significantly.

As shown, the compressor 100 according to the present invention includes a drive shaft 150 in which the swash plate 160 rotating in the swash plate chamber 136 inside the compressor 100 is inclinedly coupled to the drive shaft 150. The front and rear cylinder blocks 130 and 140 rotatably installed in the paper holes 133 and 143 and the outer circumference of the swash plate 160 are mounted via a shoe 165 to rotate the swash plate 160. A plurality of pistons 170 for reciprocating the inside of the cylinder bore (131, 141) formed on both sides of the swash plate chamber 136 of the front and rear cylinder block 130, 140, and the front and rear cylinder block The front and rear housings 110 and 120 and the front and rear cylinder blocks 130 and 140 are coupled to both sides of the 130 and 140, respectively, and the discharge chambers 111 and 121 are formed therein. The valve unit 180 is interposed between the rear housings 110 and 120, respectively.

First, both sides of the driving shaft 150 are rotatably installed in the shaft support holes 133 and 143 of the front and rear cylinder blocks 130 and 140, and one end thereof penetrates the front housing 110. Extends to engage the electronic clutch (not shown).

The swash plate 160 rotating in the swash plate chamber 136 is obliquely coupled to the drive shaft 150, and is sucked into the swash plate chamber 136 through the suction port 146 of the rear cylinder block 140. A flow path 151 is formed in communication with the swash plate chamber 136 and the cylinder bores 131, 141 so that the suction refrigerant may move through the swash plate 160 to the cylinder bores 131 and 141.

The inlet 152 of the flow path 151 is formed to communicate with the swash plate chamber 136, the outlet 153 is each suction passage 132 of the front and rear cylinder blocks 130, 140 to be described below. 142 is formed to communicate with.

Here, the inlet 152 of the flow path 151 is formed penetrating through one side of the hub 161 and the drive shaft 150 of the swash plate 160.

Meanwhile, only one inlet 152 of the flow path 151 may be formed on one side of the driving shaft 150, or two may be formed in opposite directions.

In addition, the outlet 153 of the flow path 151 is formed on both sides of the flow path 151 in opposite directions to each cylinder bore 131 provided on both sides of the swash plate chamber 136 when the drive shaft 150 rotates. At the same time, the refrigerant can be sucked into the 141.

That is, since the swash plate 160 is formed to be inclined, the piston 170 disposed in opposite directions among the piston 170 coupled to the outer circumference of the swash plate 160 performs the same suction or compression stroke, so that the flow path ( Both outlets 153 of the 151 must be formed in opposite directions so that the refrigerant can be sucked into the cylinder bores 131 and 141 provided on both sides of the swash plate chamber 136 at the same time.

Of course, the direction of each outlet 153 of the flow path 151 formed in the drive shaft 150 may vary depending on the design purpose such as the number of the piston 170.

In addition, the front and rear cylinder blocks 130 and 140 are each formed with a plurality of cylinder bores 131 and 141 on both sides of the swash plate chamber 136, the center of the drive shaft 150 to be rotatable Axial support holes 133 and 143 are formed to be supported.

In addition, the front and rear cylinder blocks (130, 140), the refrigerant sucked into the flow path 151 of the drive shaft 150 in the swash plate chamber 136, each cylinder bore (sequential) during rotation of the drive shaft 150 ( Suction passages 132 and 142 communicating with the shaft support holes 133 and 143 and the respective cylinder bores 131 and 141 are formed to be sucked into the 131 and 141.

In addition, the outer surface of one of the front and rear cylinder block 130, 140, the suction port 146 in communication with the swash plate chamber 136 to supply an external refrigerant to the swash plate chamber 136, and Discharge ports 147 communicating with the discharge chambers 111 and 121 are formed to discharge the refrigerant in the discharge chambers 111 and 121 of the front and rear housings 110 and 120 to the outside.

Accordingly, the discharge passage 134 connecting the discharge chambers 111 and 121 and the discharge port 147 of the front and rear housings 110 and 120 to the front and rear cylinder blocks 130 and 140. 144 is formed on the outer surface of the cylinder block 130, 140 muffler 135 to expand the discharge passage 134, 144 to reduce the pulsation pressure of the discharge refrigerant to reduce the noise 145 is formed.

In addition, the valve unit 180 has a plurality of refrigerant discharge holes 181a so as to communicate the cylinder bores 131 and 141 with the discharge chambers 111 and 121 of the front and rear housings 110 and 120. ) Is formed of a valve plate 181 and a discharge lead valve 182 installed at one side of the valve plate 181 to open and close the refrigerant discharge hole 181a.

That is, the discharge lead valve 182 is installed in the discharge chambers 111 and 121 of the front and rear housings 110 and 120 with respect to the valve plate 181 to compress the stroke of the piston 170. The valve plate 182a is elastically deformed to open the refrigerant discharge hole 181a and to close the refrigerant discharge hole 181a during the suction stroke.

In addition, the valve plate 181 has refrigerant in the discharge chambers 111 and 121 of the front and rear housings 110 and 120 discharge passages 134 of the front and rear cylinder blocks 130 and 140. A communication path 181b is formed to communicate the discharge chambers 111 and 121 and the discharge passages 134 and 144 so as to be discharged to the discharge port 147 via the 144.

In addition, the valve unit 180 has fixing pins 183 provided at both sides of the valve plate 181 facing the front and rear housings 110 and 120 and the front and rear cylinder blocks 130 and 140. It is coupled / fixed while being inserted into the fixing hole 112 formed in the surface.

On the other hand, the present invention is a kind of auxiliary discharge chamber 201 that can reduce the pulsating pressure in the center space, that is, dead space inside the boss 200 formed in the rear housing 120 corresponding to the rear end of the drive shaft 150. To utilize, between the rear end of the drive shaft 150 and the rear housing 120 to the valve unit 180 having a structure in which the central portion corresponding to the rear end of the drive shaft 150 is completely closed as shown in FIG. It is completely isolated by partitioning. As shown in FIG. 4, the space inside the isolated boss 200 communicates with the discharge chamber 121 of the rear housing 120 to act as the auxiliary discharge chamber 201.

The communication means 202 communicating with the discharge chamber 121 of the rear housing 120 may be formed by a hole or a groove formed in the partition wall of the rear housing 120. The flow passage cross-sectional area of the auxiliary discharge chamber 201 is made larger than the flow passage cross-sectional area of the communication means 202.

With this structure, when the refrigerant sucked into the cylinder bores 131 and 141 through the flow path of the drive shaft 150 is compressed, the compressed refrigerant in the cylinder bore 141 is discharged to the open refrigerant of the valve plate 181. The discharge chamber of the rear housing 120 while causing a muffler effect in the course of sequentially passing the communication means 202, the auxiliary discharge chamber 201, and the communication means 202 having a change in the cross-sectional area through the hole 181a. When discharged to 121, the pulsation pressure can be reduced in multiple stages, so that pulsation noise can be significantly reduced.

As such, the auxiliary discharge chamber space can exhibit the excellent pulsation noise reduction effect by increasing the refrigerant discharge chamber area of the dead space formed in the rear housing without forming a separate muffler space having a large flow path area outside the compressor. By utilizing this, the package of the compressor can be made compact.

Meanwhile, the front and rear housings 110 and 120 are formed with a plurality of bolt fastening holes 113 and 123 at edges thereof, and the front and rear through the bolt fastening holes 113 and 123. The housings 110 and 120 are fastened / fixed to the mutual bolt 190 in the state in which the above components are assembled. Of course, bolt fastening holes 138, 148, and 184 are formed in the front and rear cylinder blocks 130 and 140 and the valve unit 180 to allow the bolt 190 to pass therethrough.

As described above, in the compressor 100 according to the present invention, when the driving shaft 150 selectively receives power from an electronic clutch (not shown), the swash plate 160 rotates, and the swash plate ( The plurality of pistons 170 linked to the rotational movement of 160 repeats the action of sucking and compressing the refrigerant while reciprocating inside the cylinder bores 131 and 141 of the front and rear cylinder blocks 130 and 140. It will be done.

That is, in the suction stroke of the piston 170, an external refrigerant is supplied into the swash plate chamber 136 through the suction port 146, and then the cylinder bore 131 (through the flow path 151 of the drive shaft 150) ( 141 is directly sucked in, and during the compression stroke of the piston 170, the refrigerant sucked into the cylinder bore (131, 141) is compressed by the piston 170, the front and rear housing (110, 120) Is discharged into the discharge chambers 111 and 121 of the discharge chamber and discharged through the discharge passages 134 and 144 and the muffler 135 and 145 of the front and rear cylinder blocks 130 and 140 to the discharge port 147. Will be.

As described above, in the present invention, the flow path 151 is formed in the drive shaft 150 so that the refrigerant in the swash plate chamber 136 is directly sucked into the cylinder bores 131 and 141. Although only the case where the rotary valve configuration is applied to the fixed displacement swash plate compressor 100 has been described, the present invention is not limited thereto and may be applied to various types of compressors such as an electric compressor in the same method and configuration. You can get the effect.

As described above, a flow path is formed inside the drive shaft to simplify the internal flow path structure of the compressor and to uniformly distribute the refrigerant to each cylinder bore on both sides of the swash room, and directly supply the refrigerant supplied to the swash room to the cylinder bore through the flow path. In the suction structure, the dead space formed in the rear housing corresponding to the rear end of the drive shaft is partitioned by the valve unit, and the divided dead space communicates with the discharge chamber having a different cross-sectional area to be used as an auxiliary discharge chamber, so that the refrigerant is stored on the same compressor package. By increasing the discharge chamber area, the discharge pulsation pressure can be significantly reduced.

Claims (6)

The swash plate 160 rotating in the swash plate chamber 136 inside the compressor 100 is inclinedly coupled thereto, and the refrigerant sucked into the swash plate chamber 136 passes through the swash plate 160 so that the cylinder bores 131 and 141 are rotated. A driving shaft 150 in which a flow path 151 is formed so as to be moved to; The drive shaft 150 is rotatably installed in the shaft support holes 133 and 143, and a plurality of cylinder bores 131 and 141 are formed at both sides of the swash plate chamber 136, and the driving shaft 150 is The shaft support holes 133 and 143 and each cylinder bore 131 and 141 may be sucked into the cylinder bore 131 and 141 sequentially during the rotation of the drive shaft 150. Cylinder blocks 130 and 140 formed with suction passages 132 and 142 communicating therewith; A plurality of pistons (170) mounted on an outer circumference of the swash plate (160) via a shoe (165) and reciprocating in the cylinder bores (131, 141) in conjunction with a rotational movement of the swash plate (160); Front and rear housings 110 and 120 coupled to both sides of the cylinder blocks 130 and 140 and having discharge chambers 111 and 121 formed therein, respectively; Suction ports 146 formed on the outer surfaces of the cylinder block 140 to communicate with the swash plate chamber 136 to supply external refrigerant to the swash plate chamber 136, and the front and rear housings 110. A discharge port 147 communicating with the discharge chambers 111 and 121 so as to discharge the refrigerant in the discharge chambers 111 and 121 of the 120; A valve unit 180 interposed between the cylinder blocks 130 and 140 and the front and rear housings 110 and 120, respectively; An auxiliary discharge chamber 201 formed by separating the space formed in the rear housing 120 corresponding to the rear end of the drive shaft 150 by the valve unit 180; Communication means (202) formed on the partition wall of the rear housing (120) to communicate the discharge chamber (121) of the rear housing (120) and the auxiliary discharge chamber (201) with each other; Compressor comprising a. The method of claim 1, The inlet 152 of the flow path 151 is formed to communicate with the swash plate chamber 136, the outlet 153 is formed to communicate with the suction passages 132, 142 of the cylinder block 130, 140. Compressor, characterized in that. The method of claim 1, The valve unit 180 has a plurality of refrigerant discharge holes 181a to communicate the cylinder bores 131 and 141 with the discharge chambers 111 and 121 of the front and rear housings 110 and 120. And a discharge lead valve (182) formed at one side of the valve plate (181) and the valve plate (181) to open and close the refrigerant discharge hole (181a). The method of claim 1, The auxiliary discharge chamber 201 is a compressor, characterized in that the space inside the boss 200 formed in the rear housing 120 corresponding to the rear end of the drive shaft (150). The method of claim 1, The communicating means (202) is a compressor, characterized in that the hole or groove formed in the partition wall of the rear housing (120). The method according to any one of claims 1 to 5, Compressor, characterized in that the flow path cross-sectional area of the auxiliary discharge chamber 201 is larger than the flow path cross-sectional area of the communication means (202).

Images