KR20100091794A

KR20100091794A - Variable displacement swash plate type compressor

Info

Publication number: KR20100091794A
Application number: KR1020090011156A
Authority: KR
Inventors: 윤영섭; 윤제수
Original assignee: 한라공조주식회사
Priority date: 2009-02-11
Filing date: 2009-02-11
Publication date: 2010-08-19

Abstract

The present invention relates to a variable displacement swash plate compressor. In the present invention, the control valve 135 is installed in the rear housing 130 to adjust the pressure inside the crank chamber 121 to change the inclination angle of the swash plate 148, one end of the control valve 135 The control channel 135 ′ is connected to the rear housing 130, the front housing 120, and the through hole 116 for assembling the cylinder block 110. Accordingly, the refrigerant gas delivered from the control valve 135 flows into the crank chamber 121 through the control channel 135 ′ and the through hole 116 to adjust the pressure of the crank chamber 121.

Description

Variable displacement swash plate type compressor

The present invention relates to a compressor, and more particularly, to a variable displacement swash plate type compressor in which a refrigerant is delivered into a cylinder bore and compressed through a rotary valve provided on a rotating shaft.

Looking briefly at the air conditioning system of the vehicle, first, the refrigerant of the high temperature low pressure gas state is brought into the high temperature high pressure gas state by the compressor. The refrigerant in the high temperature and high pressure gas state becomes a high temperature high pressure liquid state by a condensation action of the condenser via a condenser, and the refrigerant in the high temperature and high pressure liquid state becomes a low temperature low pressure liquid state by a throttling action of the expansion valve through an expansion valve. do. The refrigerant in the low temperature low pressure liquid state is returned to the high temperature low pressure gas state through heat exchange in the evaporator through the evaporator, and the high temperature low pressure gas is compressed by the compressor to become a high temperature high pressure gas state. By repeating this process, the vehicle air conditioning system is operated.

Compressors for compressing a refrigerant include a reciprocating type that actually compresses a working fluid, a reciprocating type that performs compression while reciprocating, and a rotating type that performs compression while rotating.

The reciprocating type includes a crank type for transmitting the driving force of the drive source to the plurality of pistons using a crank, a swash plate type for transmitting using a rotating shaft provided with a swash plate, and a wobble plate type using a wobble plate. Rotary type includes vane rotary type using rotary rotary shaft and vane, and scroll type using rotary scroll and fixed scroll.

1 shows a configuration of a variable displacement swash plate compressor according to the prior art. According to this, the swash plate compressor 10 is provided with a cylinder block 11. The cylinder block 11 forms part of an appearance and a skeleton of the compressor 10. A center bore 12 is formed through the center of the cylinder block 11, and a plurality of cylinder bores 13 are formed to radially penetrate the cylinder block 11 surrounding the center bore 12. .

The piston 15 is installed inside the cylinder bore 13 to enable a straight reciprocating motion. The piston 15 is cylindrical and the cylinder bore 13 is a cylindrical space corresponding thereto. One end portion of the piston 15, that is, a portion 17 protruding to the outside of the cylinder bore 13 is formed with a connecting portion 17. The piston 15 compresses the refrigerant while linearly reciprocating in the cylinder bore 13.

The front housing 20 is installed at one end of the cylinder block 11. The front housing 20 is recessed to face the cylinder block 11 to form a crank chamber 21 together with the cylinder block 11. The crank chamber 21 is kept airtight with the outside.

A pulley shaft part 22 in which a pulley (not shown) is rotatably installed on the opposite side of the cylinder block 11 of the front housing 20 is formed to protrude. A shaft hole 23 is formed by penetrating the center of the pulley shaft portion 22 and penetrating the front housing 20 back and forth to the crank chamber 21. The shaft hole 23 is formed to coincide with the center bore 12. One end of the rotation shaft 40 is rotatably supported by the shaft hole 23.

The rear housing 30 is installed at the other end of the cylinder block 11. The rear housing 30 is formed with a discharge chamber 31 in selective communication with the cylinder bore 13. The discharge chamber 31 is a place where the refrigerant compressed in the cylinder bore 13 is discharged and temporarily stays.

The rear housing 30 has a suction chamber 33 is formed. The suction chamber 33 is also in selective communication with the cylinder bore 13. The suction chamber 33 is formed in an area corresponding to the center of the surface of the rear housing 30 facing the cylinder block 11. The suction chamber 33 serves to deliver the refrigerant to be compressed into the cylinder bore 13. In this embodiment, the suction port for transferring the refrigerant from the outside to the suction chamber 33 is not shown.

The bolt 37 is fastened through the cylinder block 11, the front housing 20 and the rear housing 30 to be fastened to each other. A plurality of bolts 37 are fastened through the edges of the cylinder block 11, the front housing 20 and the rear housing 30 at the same time.

The rear housing 30 is provided with a control valve 35. When the refrigerant in the discharge chamber 31 is transferred to the crank chamber 21 through the control valve 35, the piston is caused by the pressure in the crank chamber 21 and the pressure in the cylinder bore 13. 15, the angle of the swash plate 48 is adjusted by the force.

A rotating shaft 40 is rotatably installed through the center bore 12 of the cylinder block 11 and the shaft hole 23 of the front housing 20. The rotating shaft 40 is rotated by the driving force transmitted from the engine. The rotating shaft 40 is rotatably installed by the bearing 42 in the front housing 20.

The hollow shaft 41 is formed on the rotation shaft 40. The hollow part 41 is an empty space formed along the longitudinal direction inside the rotating shaft 40, and serves to communicate the crank chamber 21 and the cylinder bore 13.

The rotor 44 is installed on the rotation shaft 40. The rotor 44 is installed in the crank chamber 21 so that the rotating shaft 40 passes through the center and rotates integrally with the rotating shaft 40. The rotor 44 is fixed to the rotating shaft 40 in a substantially disk shape is installed. The hinge arm 46 protrudes from one surface of the rotor 44.

The swash plate 48 is installed on the rotation shaft 40. The swash plate 48 is formed by projecting a connecting arm 49 hinged to the hinge arm 46 of the rotor 44. The connecting arm 49 is connected at the distal end by the hinge arm 46 and the hinge structure 49 '. Thus, the swash plate 48 is hinged to the rotor 44 and rotated together.

The swash plate 48 is installed so that the angle is variable on the rotation shaft 40, between the state orthogonal to the longitudinal direction of the rotation shaft 40 and inclined at a predetermined angle with respect to the rotation shaft 40 To be in position.

The swash plate 48 has its edge connected via the pistons 15 and the shoe 52. That is, the edge of the swash plate 48 is connected to the connecting portion 17 of the piston 15 through the shoe 52 so that the piston 15 is rotated in the cylinder bore 13 by the rotation of the swash plate 48. Make a straight reciprocating movement.

A valve assembly 53 is provided between the cylinder block 11 and the rear housing 30 to control the flow of the refrigerant between the discharge chamber 31 and the cylinder bore 13. The valve assembly 53 is constituted by a valve plate 54 having a discharge hole 54 'and a discharge lead 56, which controls the flow of refrigerant from the cylinder bore 13 to the discharge chamber 31.

In the valve plate 54, the discharge hole 54 ′ and the suction hole 55 are drilled at positions corresponding to the respective cylinder bores 13. The discharge hole 54 ′ is a path through which the compressed refrigerant exits the discharge chamber 31, and the suction hole 55 is a path through which the refrigerant is transferred from the suction chamber 33 to the cylinder bore 13. Becomes

Hereinafter, the operation of the swash plate compressor according to the conventional invention having the configuration as described above will be described.

The driving force of the engine is transmitted to the rotary shaft 40 to rotate the rotary shaft 40, the swash plate 48 is rotated together by the rotor 44 coupled to the rotary shaft 40. Rotation of the swash plate 48 is transmitted to the piston 15 through the shoe 52.

Accordingly, the piston 15 compresses the refrigerant while linearly reciprocating in the cylinder bore 13. At this time, the stroke distance of the piston 15 is determined according to the angle of the swash plate 48, the strength of the swash plate 48 is adjusted according to the pressure inside the crank chamber 21.

In addition, the internal pressure of the crank chamber 21 is adjusted by the control valve 35. That is, since the crank chamber 21 is connected to the control valve 35 and the control hole 36, the refrigerant is moved from the control valve 35 to the crank chamber 21, the pressure of the crank chamber 21 This is to be controlled.

The refrigerant delivered to the cylinder bore 13 and compressed by the piston 15 is delivered to the discharge chamber 31 by the valve assembly 53 and to the outside of the compressor 10. That is, when the refrigerant is compressed to increase the pressure in the cylinder bore 13, the discharge lead 56 opens the discharge hole 54 ′ to discharge the refrigerant into the discharge chamber 31 inside the cylinder bore 13. It is.

However, the above-described conventional techniques have the following problems.

As described above, the control valve 35 transfers the refrigerant into the crank chamber 21 through the control hole 36 to adjust the pressure of the crank chamber 21. At this time, as shown, the control hole 36 is provided at a relatively higher position in the direction of gravity than the control valve 35. This means that the refrigerant transferred from the control valve 35 to the crank chamber 21 must be moved while overcoming the height difference H between the control valve 35 and the control hole 36.

Accordingly, the refrigerant for pressure control of the crank chamber 21 may not be smoothly transferred from the control valve 35 to the crank chamber 21, and a part of the highly viscous oil contained in the refrigerant may be in the control hole. 36 or remains in the space 37 between the control hole 36 and the control valve 35 can not be recovered.

And, since the control hole 36 is made by processing the cylinder block 11 separately, there is also a problem that the number of processing increases.

In addition, since the control hole 36 is formed in a central portion relatively far from the portion (top and bottom of the drawing) that is tightened by the bolt 37, between the control hole 36 and the valve plate 54 Due to the gap formed in the refrigerant may leak.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to move the refrigerant gas for adjusting the pressure of the crank chamber by using a through hole for assembling the compressor.

According to a feature of the present invention for achieving the object as described above, the present invention is a cylinder block through which a center bore is formed and a plurality of cylinder bores are formed around the center bore, and the front end of the cylinder block. And a front housing and a rear housing coupled to each other by a fastener passing through a through hole provided at the rear end and surrounding the edge of the cylinder block, and installed through the crank chamber of the center bore and the front housing to rotate. And a rotary shaft which is rotated together with the swash plate which is variablely inclined in the crank chamber, the piston receiving the rotation of the rotary shaft through the swash plate to compress the refrigerant in the cylinder bore, and the rear housing. Installed in the crank chamber to control the pressure inside the swash plate to vary the angle of inclination In the swash plate type compressor comprising a control valve, one end of the control valve is connected to the through hole by a control channel, the refrigerant gas delivered from the control valve flows into the crank chamber through the control channel and the through hole do.

A connection hole is formed in the valve plate installed between the rear housing and the cylinder block to connect one end of the control channel and one end of the through hole.

The control channel is provided to be inclined downward toward the through hole located further down the gravity direction than the control valve.

In the variable displacement swash plate compressor according to the present invention having such a configuration, the following effects can be obtained.

In the present invention, since the control hole connecting the control valve and the crank chamber is located relatively downward along the gravity direction than the control valve, the highly viscous oil contained in the refrigerant gas is accumulated between the control hole or the control hole and the control valve. Since it is prevented from being recovered, the circulation rate of the oil is improved, and the refrigerant gas can be smoothly delivered to the crank chamber, so that the pressure in the crank chamber can be easily adjusted, thereby improving compressor performance.

In the present invention, since the control hole is formed by using the through-hole in which the bolt is inserted for the assembly of the compressor, there is no need to process a separate control hole, there is also an effect of reducing the labor.

In addition, in the present invention, since the control hole is formed in the portion tightened by the bolt, the sealing property between the control hole and the valve plate is also improved, and the effect of improving the durability of the compressor can be expected.

Hereinafter, a configuration of a preferred embodiment of a variable displacement swash plate compressor according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view showing the configuration of a preferred embodiment of the variable displacement swash plate compressor according to the present invention, Figure 3 is a configuration of the rear housing constituting the embodiment of the present invention is shown in front view, Figure 4 The rear housing and the valve plate which constitute the embodiment of the present invention are illustrated in a front view.

As shown in these figures, the swash plate compressor 100 is provided with a cylinder block 110. The cylinder block 110 forms part of an appearance and a skeleton of the compressor 100. A center bore 111 is formed through the center of the cylinder block 110. The center bore 111 is a portion in which the rotating shaft 140 to be described below is rotatably installed.

A plurality of cylinder bores 113 are formed to radially penetrate the center bore 111 and penetrate the cylinder block 110. A communication path 114 is formed to communicate the cylinder bore 113 and the center bore 111. The communication path 114 is a passage for transferring the refrigerant to the cylinder bore 113.

The piston 115 is installed inside the cylinder bore 113 to enable a straight reciprocating motion. The piston 115 has a cylindrical shape, and the cylinder bore 113 has a cylindrical shape corresponding thereto. One end portion of the piston 115, that is, a portion protruding to the outside of the cylinder bore 113 is formed with a connecting portion 117. The piston 115 compresses the refrigerant while linearly reciprocating in the cylinder bore 113.

The through-hole 116 is formed in the cylinder block 110. The through hole 116 is formed to penetrate the cylinder block 110, and is penetrated by the fastener 137 to be described below to pass the cylinder block 110 to the front housing 120 and the rear housing 130. To be tightened. The through-hole 116 is provided with a plurality around the edge of the cylinder block 110, but only the bottom through-hole 116 is shown in FIG.

The front housing 120 is installed at one end of the cylinder block 110. The front housing 120 has a concave side facing the cylinder block 110 to cooperate with the cylinder block 110 to form a crank chamber 121 therein. The crank chamber 121 is kept airtight with the outside of the compressor.

The pulley shaft portion 122, on which the pulley 160 is rotatably installed, protrudes from the opposite side of the cylinder block 110 of the front housing 120. The shaft hole 123 is formed by penetrating the center of the pulley shaft portion 122 and penetrating the front housing 120 back and forth to the crank chamber 121. The shaft hole 123 is formed to coincide with the center bore 111. One end of the rotating shaft 140 is rotatably supported by the shaft hole 123.

The rear housing 130 is installed at the other end of the cylinder block 110, that is, on the opposite side to which the front housing 120 is installed. The rear housing 130 is formed with a discharge chamber 131 in selective communication with the cylinder bore 113. The discharge chamber 131 is formed along an edge of a surface of the rear housing 130 that faces the cylinder block 110. The discharge chamber 131 is a place where the refrigerant compressed in the cylinder bore 113 is discharged and temporarily stays.

The suction chamber 133 is formed at the center of the rear housing 130 facing the cylinder block 110. The suction chamber 133 also selectively communicates with the cylinder bore 113. The suction chamber 133 serves to deliver a refrigerant to be compressed into the cylinder bore 113. The suction chamber 133 transfers the refrigerant to the communication path 114 through the rotary valve 141 formed at one end of the rotary shaft 140.

The rear housing 130 is provided with a control valve 135. The control valve 135 serves to adjust the pressure of the crank chamber 121. More specifically, when the refrigerant in the discharge chamber 131 is transferred to the crank chamber 121 through the control valve 135, the pressure in the crank chamber 121 and the pressure in the cylinder bore 113 By the piston 115 by the force is adjusted the angle of the swash plate 148.

One end of the control valve 135 is provided with a control channel 135 ′. The control channel 135 ′ is a type of passage connecting the one end corresponding to the outlet of the control valve 135 and the through hole 116, and provides refrigerant to the through hole 116 from the control valve 135. It serves to convey.

In this case, as shown in FIG. 3, the control channel 135 ′ extends inclined downward along the gravity direction from one end of the control valve 135. This is to allow the refrigerant to be moved from the control valve 135 toward the through hole 116 to move naturally without opposing gravity.

A fastener 137 penetrates and fastens the cylinder block 110, the front housing 120, and the rear housing 130 to each other. A plurality of fasteners 137 penetrates through edges of the cylinder block 110, the front housing 120, and the rear housing 130 at the same time. In this embodiment, the fastener 137 is a bolt.

The fastener 137 passes through the through hole 116 of the cylinder block 110, and a part of the front end of the fastener 137 is inserted into the bolt hole 136 provided in the rear housing 130. Like the through-hole 116, the bolt hole 136 is provided with a plurality around the edge of the rear housing 130. The inner circumferential surface of the bolt hole 136 is provided with a screw thread corresponding to the thread of the fastener 137, and is screwed with the fastener 137.

In this case, the bolt hole 136, as shown in Figure 3, is provided at a position adjacent to the front end of the control channel (135 '). This is to facilitate the transfer of the refrigerant moving through the control channel 135 ′ to the through hole 116 communicating with the bolt hole 136.

The rotating shaft 140 is rotatably installed through the center bore 111 of the cylinder block 110 and the shaft hole 123 of the front housing 120. The rotating shaft 140 is rotated by the driving force transmitted from the engine. The rotation shaft 140 is rotatably installed in the front housing 120 and the cylinder block 110.

One end of the rotary shaft 140 is provided with a rotary valve 141. The rotary valve 141 is formed integrally with the rotary shaft 140 in the present embodiment, but need not necessarily be, and may be coupled after being made separately from the rotary shaft 140.

A flow path 142 is formed in the rotary valve 141 to communicate with the suction chamber 133. The flow path 142 is formed to be opened to one end of the rotary valve 141. A flow path outlet 142 ′ is formed at an outer surface of the rotary valve 141 to selectively communicate the flow path 142 and the communication path 114.

The rotor 146 is installed on the rotation shaft 140. The rotor 146 is installed in the crank chamber 121 so that the rotating shaft 140 passes through the center and rotates integrally with the rotating shaft 140. The rotor 146 is fixed to the rotating shaft 140 in a substantially disk shape is installed. The hinge arm 147 protrudes from one surface of the rotor 146. A hinge slot 147 'is formed in the hinge arm 147.

The swash plate 148 is installed on the rotation shaft 140. The swash plate 148 protrudes from the connecting arm 149 which is connected to the hinge arm 147 of the rotor 146. A hinge pin 149 'is installed at a distal end of the connecting arm 149 in a direction orthogonal to the longitudinal direction of the connecting arm 149. The hinge pin 149' is a hinge arm 147 of the rotor 146. It is movably walked to the hinge slot 147 'formed at the tip of the head.

The swash plate 148 is hinged and rotated together with the rotor 146. The swash plate 148 is installed so that the angle is variable on the rotating shaft 140, between the state orthogonal to the longitudinal direction of the rotating shaft 140 and inclined at a predetermined angle with respect to the rotating shaft 140 To be in position.

The radial shaft spring 150, which is a coil spring, is installed on the rotary shaft 140 to surround the rotary shaft 140. The radial yarn spring 150 exerts an elastic force between the rotor 146 and the swash plate 148. The radial yarn spring 150 exerts an elastic force in a direction in which the inclination angle of the swash plate 148 decreases, and absorbs a force acting on the swash plate 148 when the compressor 100 is stopped. do.

The swash plate 148 has an edge thereof connected to the pistons 115 and the shoe 152. That is, the edge of the swash plate 148 is connected to the connecting portion 117 of the piston 115 through the shoe 152 so that the piston 115 is in the cylinder bore 113 by the rotation of the swash plate 148. Make a straight reciprocating exercise at.

A valve assembly 153 is provided between the cylinder block 110 and the rear housing 130 to control the flow of the refrigerant between the discharge chamber 131 and the cylinder bore 113. The valve assembly 153 is constituted by a valve plate 154 and a discharge lead 156 having a discharge hole 154 ′, which controls the flow of refrigerant from the cylinder bore 113 to the discharge chamber 131.

At this time, as shown in Figure 4, the valve plate 154 is provided with a connection hole 155. The connection hole 155 connects one end of the control channel 135 ′ and the through hole 116 to each other. For this purpose, the connection hole 155 is formed in a long hole shape. That is, the control channel 135 ′ and the through hole 116 communicate with each other through the connection hole 155 to continuously transmit the refrigerant.

A pulley 160 is rotatably installed at the pulley shaft portion 122 formed at the front end of the front housing 120. The pulley 160 is selectively connected to the rotary shaft 140 and the clutch 162 to transmit the driving force of the engine to the rotary shaft 140 via the pulley 160, the clutch 162.

Hereinafter, the operation of the variable displacement swash plate compressor according to the present invention having the configuration as described above.

When the rotation shaft 140 is rotated by the driving force of the engine, the rotor 146 rotates together, and the swash plate 148 rotates together by the rotor 146. Rotation of the swash plate 148 is transmitted to the piston 115 through the shoe 152.

Therefore, the piston 115 compresses the refrigerant while linearly reciprocating in the cylinder bore 113. At this time, the stroke distance of the piston 115 is determined according to the angle of the swash plate 148. The angle of the swash plate 148 may be adjusted by the pressure of the refrigerant delivered into the crank chamber 121.

Looking at the process of adjusting the pressure of the crank chamber 121 in more detail, first, the refrigerant supplied from the control valve 135 is introduced into the control channel 135 'connected to the front end of the control valve 135. In this case, since the control channel 135 'is formed to be inclined downward along the gravity direction, the refrigerant may naturally move along the control channel 135'.

In addition, the refrigerant is transferred to the through hole 116 through the connection hole 155 of the valve plate 154 connected to one end of the control channel 135 ′. Subsequently, the refrigerant moves along the through hole 116, and consequently flows into the crank chamber 121. In this case, since the fastener 137 simply passes through the through hole 116, and threads are not formed on the inner circumferential surface of the through hole 116, the refrigerant is fastened to the inner circumferential surface of the through hole 116. It can be moved at intervals between the outer peripheral surface of the sphere (137).

As such, since the refrigerant moves along the through hole 116 through which the fastener 137 passes, it is necessary to form a separate flow path for connecting the refrigerant to the control valve 135 and the crank chamber 121. There will be no. In addition, since the coolant may naturally move along the gravity direction, the coolant, in particular, the highly viscous oil included in the coolant is prevented from being accumulated in the control channel 135 '.

On the other hand, it will be described that the refrigerant is delivered into the cylinder bore (113). The refrigerant delivered from the outside to the suction chamber 133 is transferred to the flow path 142 provided in the rotary valve 141 of the rotary shaft 140. The refrigerant delivered to the flow path 142 is sequentially communicated with each of the cylinder bores 113 and the respective communication paths 114 by the flow path outlets 142 ′ as the rotation shaft 140 rotates. The cylinder bore of 113 is delivered.

As such, the refrigerant delivered to the cylinder bore 113 and compressed by the piston 115 is delivered to the discharge chamber 131 by the valve assembly 153 and is transferred to the outside of the compressor 100. That is, when the refrigerant is compressed to increase the pressure inside the cylinder bore 113, the tip of the discharge lead 156 is pushed by the pressure, and the discharge hole 154 ′ is opened to open the inside of the cylinder bore 113. Discharges the refrigerant to the discharge chamber 131.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

In the above embodiment, the front end of the control channel 135 ′ is processed at a position adjacent to the bolt hole 136, but the control channel 135 ′ may be formed to communicate with the bolt hole 136. .

In addition, the control channel 135 ′ is not formed to be inclined downward along the direction of gravity, but may be formed to extend toward the through hole 116 provided at the same height.

1 is a cross-sectional view showing the configuration of a variable displacement swash plate compressor according to the prior art.

Figure 2 is a cross-sectional view showing the configuration of a preferred embodiment of a variable displacement swash plate compressor according to the present invention.

Figure 3 is a front view showing the configuration of the rear housing constituting the embodiment of the present invention.

Figure 4 is a front view showing a configuration coupled to the rear housing and the valve plate constituting an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: compressor 110: cylinder block

111: center bore 113: cylinder bore

115: piston 116: through hole

120: front housing 121: crankcase

122: pulley shaft portion 123: shaft hole

130: rear housing 131: discharge chamber

133: suction chamber 135: control valve

135 ': control channel 136: bolt hole

140: rotation axis 146: rotor

147: hinge arm 147 ': hinge slot

148: Saphan 149: connecting arm

150: radial yarn spring 153: valve assembly

154: valve plate 155: connecting hole

154 ': discharge hole 156: discharge lead

160: pulley

Claims

A cylinder block 110 having a center bore 111 formed therethrough and a plurality of cylinder bores 113 formed around the center bore 111;

The front housing 120 is provided at the front and rear ends of the cylinder block 110 and coupled to each other by a fastener 137 passing through a through hole 116 provided around the edge of the cylinder block 110. The rear housing 130,

Rotating shaft which is installed and rotated through the crank chamber 121 of the center bore 111 and the front housing 120 and rotated in combination with the swash plate 148 variablely inclined in the crank chamber 121 140,

Piston 115 for receiving the rotation of the rotary shaft 140 through the swash plate 148 to compress the refrigerant in the cylinder bore 113, respectively;

In the swash plate type compressor comprising a control valve 135 installed in the rear housing 130 to control the pressure inside the crank chamber 121 to vary the inclination angle of the swash plate 148,

One end of the control valve 135 is connected to the through hole 116 by a control channel 135 ′, and the refrigerant gas delivered from the control valve 135 is a control channel 135 ′ and a through hole 116. A variable displacement swash plate compressor, characterized in that flow into the crank chamber (121) through.

The valve plate 154 formed between the rear housing 130 and the cylinder block 110 has a connection hole 155 formed therein, so that one end and the through hole of the control channel 135 'are formed. A variable displacement swash plate compressor characterized by connecting one end of the hole (116).

The variable displacement swash plate compressor of claim 1, wherein the control channel 135 ′ is inclined downward toward the through hole 116 located further down the gravity direction than the control valve 135. .