KR101085723B1 - Compressor - Google Patents

Abstract

The present invention relates to a compressor, using a rotating shaft 140 having a swash plate 142 to drive the piston 158 linearly reciprocating in the cylinder bore 135 formed in the cylinder blocks (130, 130 '). In addition, the cylinder block 130, 130 ′ is formed with a shaft support hole 131 into which the rotation shaft 140 is inserted, and the sealing rib 133 protrudes toward the front and rear housings 110 and 120 around the shaft support hole 131. The grooves 134 are formed on the outer surfaces of the cylinder blocks 130 and 130 ′ facing the valve unit 160 along the edges of the sealing ribs 133. According to the present invention, in the process of cutting the outer surface of the cylinder block (130,130 '), the tip of the tool touches the sealing rib 133 to prevent the occurrence of burrs or sharp edges in the cylinder block (130,130') Thus, the precision of the cylinder blocks (130, 130 ') is improved, there is an effect that can prevent the injury of the operator in the machining process.

Compressor, Swash Plate, Suction Passage, Cutting

Description

Compressor

The present invention relates to a compressor, and more particularly to a compressor in which the working fluid is delivered to the cylinder bore through a flow path formed inside the rotating shaft and the working fluid is compressed in the cylinder bore by a piston driven by a swash plate installed on the rotating shaft. will be.

In general, the compressor used in the air conditioning system of the automobile sucks the working fluid from the evaporator to the high temperature and high pressure which is easy to liquefy, and delivers it to the condenser.

In such a compressor, a configuration for compressing a working fluid includes a reciprocating type that performs compression while reciprocating and a rotary type that performs compression while rotating. The reciprocating type includes a crank type for transmitting a driving force of a driving source using a crank shaft, a swash plate for transferring 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 and 2 disclose a configuration of a general swash plate compressor. A schematic configuration of a swash plate compressor will be described with reference to the drawings. The front and back housings 10, the rear housing 30, and the front and rear cylinder blocks 30 and 30 ′ form the skeleton and the exterior of the compressor 1. A rotating shaft 40 is installed through the center of the front housing 10 and the front and rear cylinder blocks 30 and 30 ', and the rotating shaft 40 is rotated by an external driving force. The front housing 10 and the rear housing 30 are coupled to the outside of the front and rear cylinder blocks 30 and 30 ', respectively.

The piston 50, which linearly reciprocates by the rotation of the rotary shaft 40, is installed in the cylinder bore 35 of the front and rear cylinder blocks 30, 30 ', and compresses the working fluid compressed by the cylinder bore 35. A valve unit 60 for controlling discharge is installed between the front housing 10 and the front cylinder block 30 and between the rear housing 30 and the rear cylinder block 30 '. The front housing 10, the rear housing 20, the front and rear cylinder blocks (30, 30 ') are fastened to each other by a fixing bolt 70, the fixing bolt 70 is the front housing 10, the rear housing 20, penetrates the front and rear cylinder blocks 30 and 30 '. To this end, the bolt holes 10 'and 20' are formed in the front housing 10 and the rear housing 20.

Now, the detailed configuration of each component described above will be described. First, the front housing 10 has a cylindrical hole 12 through which the rotating shaft 40 passes through the center in a substantially disk shape. The shaft hole 12 penetrates the center of the boss portion 13 protruding from the center of one surface of the front housing 10. The discharge chamber 14 is recessed on the opposite surface on which the boss portion 13 of the front housing 10 is formed. The discharge chamber 14 is formed over a substantially ring-shaped region, and selectively communicates with each cylinder bore 35 of the front cylinder block 30 through the valve unit 60.

The rear housing 20 is mounted on one surface of the rear cylinder block 30 '. The discharge chamber 22 is formed on the surface of the rear housing 20 facing the rear cylinder block 30 '. The discharge chamber 22 is selectively formed to communicate with the cylinder bores 35 formed in the rear cylinder block 30 'through the valve unit 60.

 The front and rear cylinder blocks 30 and 30 'are recessed portions formed on surfaces coupled to each other to form the swash plate chamber 31. In the swash plate chamber 31, a swash plate 42 installed on the rotating shaft 40 is rotatably positioned. The shaft support hole 32 is formed through the front and rear cylinder blocks 30 and 30 '. The rotary shaft 40 penetrates the shaft support hole 32.

A plurality of cylindrical cylinder bores 35 are formed in the front and rear cylinder blocks 30 and 30 'in the direction of forming the shaft support hole 32 with the shaft support hole 32 as the center. Of course, the cylinder bores 35 are formed at positions corresponding to the front and rear cylinder blocks 30 and 30 ', respectively.

Sealing ribs 33 are formed in the front and rear cylinder blocks 30 and 30 '. The sealing rib 33 is formed to protrude along the opening inlet edge of the shaft support hole 32. The sealing rib 33 is formed to protrude further from the surfaces of the front and rear cylinder blocks 30 and 30 'to secure the sealing surface between the front and rear cylinder blocks 30 and 30' and the rotating shaft 40. .

The cylinder bore 35 and the shaft support hole 32 communicate with each other through the suction passage 36, respectively. The suction passage 36 allows the working fluid delivered through the inside of the rotating shaft 40 to be delivered to the cylinder bore 35, respectively.

Discharge passages 38 are formed in the front and rear cylinder blocks 30 and 30 ′ so as to communicate with the discharge chambers 14 and 22 of the front and rear housings 10 and 20, respectively. The discharge passage 38 serves as a passage for discharging the working fluid compressed in the cylinder bore 35 to the outside.

The rotary shaft 40 has one end penetrating the front housing 10 and an intermediate part penetrating the front and rear cylinder blocks 30 and 30 '. An approximately disk-shaped swash plate 42 is inclined with respect to the extending direction of the rotating shaft 40 on the rotating shaft 40. The center of the swash plate 42 is provided with a hub 44 having a cylindrical shape, the rotation shaft 40 penetrates through the hub 44. A communication hole 44 ′ is drilled through the hub 44 so as to communicate with the inside of the rotation shaft 40. Then, a plurality of shoes 45 surrounding the edge of the swash plate 42 is installed. The shoe 45 is configured to move along the edge of the swash plate 42. At this time, the bearing 46 is provided between the both ends of the swash plate 42 and the cylinder block (30, 30 '), respectively.

The flow path 47 through which the working fluid flows is formed in the rotary shaft 40. The flow passage 47 is formed long in the longitudinal direction of the rotation shaft 40 inside the rotation shaft 40. An inlet 48 and an outlet 48 ′ are formed on the outer surface of the rotation shaft 40. The inlet 48 communicates the swash plate chamber 31 and the flow passage 47, and the outlet 48 ′ communicates with the suction passage 36 of the front and rear cylinder blocks 30 and 30 ′. Formed in position. The position of the outlet 48 ′ should be formed in accordance with the compression order of the working fluid proceeding in each cylinder bore 35. Reference numeral 49 is a shaft sealing portion that prevents the gap between the inner surface of the shaft hole 12 of the front housing 10 and the outer surface of the rotary shaft 40.

Piston 50 is to linearly reciprocate the inside of the cylinder bore (35). The piston 50 has a substantially cylindrical shape corresponding to the inside of the cylinder bore 35, and both ends thereof are positioned at the cylinder bores 35 of the front and rear cylinder blocks 30 and 30 ', respectively. That is, both ends of each of the one piston 50 serves to compress the working fluid in the cylinder bore (35). The piston 50 is coupled to the middle of the shoe 45, the linear reciprocating motion in accordance with the rotation of the swash plate 42.

The valve unit 60 is used to control the discharge of the working fluid compressed in the cylinder bore 35 to the outside of the cylinder bore 35. The valve unit 60 includes a valve plate 62 which is installed in close contact with one surface of the front and rear cylinder blocks 30 and 30 ', and the valve plate 62 corresponds to each cylinder bore 35. The discharge hole 64 is formed in the position. Discharge leads 66 are used to selectively open and close the discharge holes 64, respectively. The discharge lead 66 may be elastically deformed and elastically deformed according to the pressure of the working fluid in the cylinder bore 35 to open and close the discharge hole 64.

The valve plate 62 is formed in a substantially disk-shaped communication hole 67 at a position corresponding to the discharge passage 38. The communicating hole 67 serves to communicate the respective discharge chambers 14 and 22 with the discharge passage 38.

A muffler 68 is formed on the outer surface of the front and rear cylinder blocks 30 and 30 'so as to communicate with the discharge passage 38. The muffler 68 serves to reduce pulsation and noise of the working fluid. The muffler 68 is formed with a discharge port 69 for discharging the working fluid to the outside (condenser) of the compressor (1). For reference, a suction port (not shown) for transmitting a working fluid into the swash plate chamber 31 of the compressor 1 is formed at one side of the front and rear cylinder blocks 30 and 30 '. Reference numerals 16 and 18 denote oil chambers and communication paths, respectively.

The operation of the general compressor 1 having such a configuration will be described. As the rotary shaft 40 rotates by a driving force transmitted from the outside, the swash plate 42 is rotated with the rotation of the rotary shaft 40. Rotation of the swash plate 42 allows the piston 50 to make a straight reciprocating motion inside the cylinder bore 35.

At this time, as the rotary shaft 40 rotates, the flow passage 47 inside the rotary shaft 40 communicates with the cylinder bore 35 through the outlet 48 'and the suction passage 36. The communication between the flow passage 47 and the cylinder bore 35 allows the working fluid sucked into the swash plate chamber 31 to be transferred to the cylinder bore 35. For reference, the working fluid is sucked into the cylinder bore 35 when the piston 50 is located at the bottom dead center of the corresponding cylinder bore 35.

When the working fluid is transferred to the cylinder bore 35, and the piston 50 of the corresponding cylinder bore 35 moves in the direction of the valve plate 62, compression of the working fluid occurs. When the working fluid is compressed in the cylinder bore 35, the pressure inside the cylinder bore 35 becomes relatively high, and the tip of the discharge lead 66 is pushed and elastically deformed to open the discharge hole 64. do.

In this case, the working fluid compressed through the discharge hole 64 is transferred to the discharge chambers 14 and 22, and the working fluid delivered to the discharge chambers 14 and 22 is communicated through the communication hole 67. The seawater is delivered to the muffler 68 via the discharge passage 38, and is transferred from the muffler 68 to the condenser through the discharge port 69.

However, the conventional compressor as described above has the following problems.

After the front and rear cylinder blocks 30 and 30 'are manufactured by casting, they are subjected to cutting. That is, the surface A facing the valve plate 62 is precisely post-processed through cutting.

In this case, a burr or a sharp edge may be formed in the front and rear cylinder blocks 30 and 30 'in the process of machining the valve plate 62 using a tool. This occurs when the sharp tip of the tool touches between the surface A of the front and rear cylinder blocks 30 and 30 ′ facing the valve plate 62 and the sealing rib 32 (B).

 Such burrs or sharp edges reduce the precision of the front and rear cylinder blocks 30 and 30 'and have a problem of causing injury to workers in the machining process.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to prevent burrs or sharp edges from being generated in the cylinder block during the cutting process of the cylinder block.

According to a feature of the present invention for achieving the object as described above, the present invention comprises a front and rear housing to form an outer appearance of at least both ends of the compressor; A cylinder block positioned between the front and rear housings, formed to penetrate a plurality of cylinder bores, and having a swash plate chamber therein; A rotating shaft on which the swash plate positioned in the swash plate chamber is rotatably installed, and a flow path for transmitting a working fluid sucked into the compressor to the cylinder bore; A plurality of pistons linearly reciprocating in the cylinder bore according to the rotational motion of the swash plate; And a valve unit installed between the front and rear housings and the cylinder block to control the discharge of the working fluid compressed by the cylinder bore, wherein the cylinder block is formed with a shaft support hole into which the rotating shaft is inserted. The sealing rib to which the valve unit is coupled is formed to protrude in the front and rear housing directions, and a processing groove is formed along the edge of the sealing rib on the outer surface of the cylinder block facing the valve unit.

An inclined surface is formed on an inner surface of the processing groove connected to the front end of the outer surface of the cylinder block facing the valve unit, and the width of the processing groove becomes narrower toward the bottom surface of the processing groove.

The width of the processing groove is formed 0.5mm to 1.5mm smaller than the distance between the front end of the valve unit and the sealing rib, the recessed depth of the processing groove is formed in the dimension of 0.5mm to 2.0mm.

In the present invention, the outer surface of the cylinder block is formed by recessed machining grooves surrounding the sealing ribs. Accordingly, in the process of cutting the outer surface of the cylinder block, the tip of the tool touches the sealing ribs to prevent burrs or sharp edges from being generated, thereby improving the accuracy of the cylinder block and improving the accuracy of the operator. It is effective to prevent injury.

In addition, in the present invention, since the processing groove is recessed in the outer surface of the cylinder block to reduce the area to be cut, workability is also improved.

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

FIG. 3 is a sectional view showing the configuration of a preferred embodiment of the compressor according to the present invention, and FIG. 4 is a perspective view showing the configuration of the cylinder block constituting the embodiment of the present invention.

As shown in these figures, the front housing 110, the rear housing 120, and the front and rear cylinder blocks 130, 130 'form the skeleton and appearance of the compressor 100. Of course, the skeleton and appearance of the compressor 100 are formed by the front housing 110 and the rear housing 120, the cylinder block (130, 130 ') may be provided in the interior space of the front and rear housing (110, 120).

These are arranged and coupled in the order of the front housing 110, the front and rear cylinder blocks (130, 130 ') and the rear housing 120, through which the rotary shaft 140 is rotated by an external drive source is installed.

Piston 158 linearly reciprocating in conjunction with the rotation of the rotary shaft 140 is installed in the cylinder bore 135 of the front and rear cylinder blocks (130, 130 '), the discharge of the working fluid compressed in the cylinder bore (135) It is made by the valve unit 160.

The front and rear housings 110 and 120, and the front and rear cylinder blocks 130 and 130 ′ are fastened to each other by a plurality of fixing bolts 170 penetrating them. For this purpose, the front and rear housings 110 and 120 are bolted holes 110 ′ and 120 ′. ) Is formed.

Hereinafter, the components constituting the compressor 100 will be described in more detail. The front housing 110 is formed in a shaft through-hole 112 through which the rotating shaft 140 passes through the center in a substantially disk shape. The shaft hole 112 is formed through the center of the boss portion 113 protruding in the center of one surface of the front housing 110.

The discharge chamber 114 is formed in the front housing 110 on the opposite surface on which the boss portion 113 is formed. The discharge chamber 114 may be formed over a substantially ring-shaped region so as to selectively communicate with each cylinder bore 135 of the front cylinder block 130 and the valve unit 160.

The rear housing 120 is mounted on one surface of the rear cylinder block 130 ′, ie, the opposite surface 132 of the rear cylinder block 130 ′ in close contact with the front cylinder block 130. The discharge chamber 122 is recessed on a surface of the rear housing 120 that faces the rear cylinder block 130 ′.

In the center of the rear housing 120, a rotating shaft chamber 124 corresponding to one end of the rotating shaft 140 is formed. The rotary shaft chamber 124 is formed by partitioning the discharge chamber 122 in the center of the discharge chamber 122.

The front and rear cylinder blocks 130 and 130 ′ are formed to correspond to portions concaved to the surfaces joined to each other to form the swash plate chamber S. The swash plate 142 installed on the rotating shaft 140 is rotatably positioned in the swash plate chamber (S). A suction port (not shown) is formed at a position corresponding to the swash plate chamber S among the outer surfaces of the front and rear cylinder blocks 130 and 130 ′ to transmit a working fluid transferred from the evaporator to the inside of the swash plate chamber S.

Axial support holes 131 are formed in the front and rear cylinder blocks 130 and 130 '. The shaft support hole 131 is a portion into which the rotation shaft 140 is inserted, and has an inner diameter corresponding to the diameter of the rotation shaft 140.

Sealing ribs 133 are provided at the front and rear cylinder blocks 130 and 130 ′. The sealing rib 133 is provided on the outer surface 132 of the front and rear cylinder blocks (130, 130 ') facing the valve plate 162 to be described later, protrudes along the opening inlet edge of the shaft support hole (131) Is formed. The sealing rib 133 is a portion for sufficiently securing the sealing surface between the rotating shaft 140 and the front and rear cylinder blocks (130, 130 ').

Machining grooves 134 are formed in the front and rear cylinder blocks 130 and 130 '. The processing groove 134 is formed to be recessed around the sealing rib 133 on the outer surface 132 of the front and rear cylinder blocks 130 and 130 ′ facing the valve plate 162. The processing groove 134 is a kind of free space for preventing the tip of the tool from contacting the sealing rib 133 in the process of cutting the outer surface 132 of the front and rear cylinder blocks (130, 130 ').

That is, as shown in Figure 3, a predetermined distance (H) is secured between the outer surface 132 of the front and rear cylinder blocks (130, 130 ') and the sealing rib 133 by the machining groove 134, so that the tip of the tool The contact with the sealing rib 133 is prevented.

At this time, the inclined surface 134 ′ is formed on the inner surface of the processing groove 134. The inclined surface 134 'is formed to be inclined on the inner surface of the processing groove 134 connected to the front end of the outer surface 132 of the cylinder block 130 facing the valve unit 160, the inclined surface 134' The width of the processing groove 134 becomes narrower toward the bottom surface thereof by).

The inclined surface 134 ′ is machined so that the outer surface 132 of the front and rear cylinder blocks 130 and 130 ′ and the processing groove 134 form an obtuse angle (α °) and the outer surface 132 of the front and rear cylinder blocks 130 and 130 ′. It serves to prevent the formation of sharp edges between the grooves (134).

At this time, the width (A) of the processing groove 134 is formed smaller than the distance (C) between the front end of the valve unit 160 and the sealing rib 133. This is to prevent the valve unit 160 from being deformed because the tip of the valve unit 160 is positioned on the processing groove 134. Preferably, the width A of the processing groove 134 is 0.5 mm to 1.5 mm smaller than the distance C between the tip of the valve unit 160 and the sealing rib 133.

In addition, the recessed depth B of the processing groove 134 is preferably formed in the dimensions of 0.5mm to 2.0mm. This is because if the recessed depth B of the processing groove 134 is too small, the processing groove 134 does not function properly. This is because the thickness of the cylinder blocks may weaken the durability of the front and rear cylinder blocks 130 and 130 '.

The front and rear cylinder blocks 130 and 130 'are formed by passing through a plurality of cylindrical cylinder bores 135 in the direction of formation of the mounting holes 131 and 131' with the shaft support hole 131 as the center. In this case, the cylinder bore 135 is formed at positions corresponding to the front and rear cylinder blocks 130 and 130 ', respectively.

Suction passages 136 are formed in the front and rear cylinder blocks 130 and 130 '. The suction passage 136 communicates between the cylinder bore 135 and the shaft support hole 131 so that the working fluid is transferred to the cylinder bore 135 through the interior of the rotating shaft 140.

Discharge passages 138 are formed in the front and rear cylinder blocks 130 and 130 ′ so as to communicate with discharge chambers 114 and 122 of the front and rear housings 110 and 120, respectively. The discharge passage 138 serves as a passage for discharging the working fluid compressed in the cylinder bore 135 to the outside.

One end of the rotating shaft 140 passes through the front housing 110, and the other end of the rotating shaft 140 faces the rotating shaft chamber 124 of the rear housing 120. An approximately disk-shaped swash plate 142 is installed to be inclined with respect to the extending direction of the rotating shaft 140. The center of the swash plate 142 is provided with a hub 144 having a cylindrical shape, the rotating shaft 140 passes through the hub 144. The communication hole 144 ′ is drilled through the hub 144 so as to communicate with the inside of the rotation shaft 140. A plurality of shoes 145 surrounding the edge of the swash plate 142 is installed. The shoe 145 is configured to move along an edge of the swash plate 142. In this case, bearings 146 are provided between the both ends of the swash plate 142 and the cylinder blocks 130 and 130 ', respectively.

The flow passage 147 through which the working fluid flows is formed inside the rotating shaft 140. The flow path 147 is formed long in the longitudinal direction of the rotation shaft 140 inside the rotation shaft 140. The flow path 147 is formed to be opened to one end of the rotation shaft 140, and the opened portion is positioned to face the rotation shaft chamber 124 of the rear housing 120.

In order to communicate with the flow path 147, the swash plate chamber S, and the suction passage 136, the inlet 148 and the outlet 148 are respectively opened in the rotation shaft 140 to the outer surface of the rotation shaft 140. ') Is formed. The inlet 148 and the outlet 148 ′ may each be formed in plurality. Reference numeral 149 denotes a shaft sealing part that prevents a gap between the inner surface of the shaft through hole 112 of the front housing 110 and the outer surface of the rotating shaft 140.

The piston 158 is a linear reciprocating motion in the cylinder bore (135). The piston 158 has a substantially cylindrical shape corresponding to the inside of the cylinder bore 135, and both ends thereof are positioned at the cylinder bores 135 of the front and rear cylinder blocks 130 and 130 ', respectively. That is, both ends of the one piston 158 serves to compress the working fluid in the cylinder bore 135.

The valve unit 160 is used to control the discharge of the working fluid compressed in the cylinder bore 135 to the outside of the cylinder bore 135. The valve unit 160 includes a valve plate 162 installed in close contact with one surface of the front and rear cylinder blocks 130 and 130 ′, and the valve plate 162 is positioned at a position corresponding to each cylinder bore 135. The discharge hole 164 is formed. Discharge leads 166 are used to selectively open and close the discharge holes 164, respectively. The discharge lead 166 may be elastically deformable and may be elastically deformed according to the pressure of the working fluid in the cylinder bore 135 to open the discharge hole 164.

The valve plate 162 is formed in a substantially disk shape, the communication hole 167 is formed in a position corresponding to the discharge passage 138. The communication hole 167 serves to communicate the respective discharge chambers 114 and 122 with the discharge passage 138.

A muffler 168 is formed on outer surfaces of the front and rear cylinder blocks 130 and 130 ′ so as to communicate with the discharge passage 138. The muffler 168 serves to reduce pulsation and noise of the working fluid. The muffler 168 is provided with a discharge port 169 for discharging the working fluid to the outside (condenser) of the compressor (100). Reference numerals 116 and 118 denote oil chambers and communication paths, respectively.

Hereinafter, the operation of the compressor according to the present invention having the configuration as described above will be described in detail.

In the compressor 100 of the present invention, as the rotary shaft 140 is rotated by a driving force transmitted from the outside, the swash plate 142 is rotated together with the rotary shaft 140. Rotation of the swash plate 142 causes the piston 158 to perform a linear reciprocating motion inside the cylinder bore 135.

As the rotary shaft 140 rotates, the flow path 147 inside the rotary shaft 140 sequentially communicates with the respective cylinder bores 135 through the outlet 148 ′ and the suction passage 136. That is, the cylinder bore 135 and the flow passage 147 communicate with each other through the suction passage 136 of the outlet 148 'and the front and rear cylinder blocks 130 and 130'.

The communication between the flow path 147 and the cylinder bore 135 allows the working fluid delivered from the outside of the compressor 100 to be transferred to the cylinder bore 135. For reference, the working fluid is sucked into the cylinder bore 135 when the piston 158 is located at the bottom dead center of the corresponding cylinder bore 135.

When the working fluid is transferred to the cylinder bore 135, and the piston 158 of the corresponding cylinder bore 135 moves in the direction of the valve plate 162, compression of the working fluid occurs. When the working fluid is compressed in the cylinder bore 135, the pressure inside the cylinder bore 135 becomes relatively high, and the tip of the discharge lead 166 is pushed and elastically deformed to open the discharge hole 164. do.

This is possible because the outer surface 132 of the front and rear cylinder block 130 'is installed in contact with the valve plate 162. The front and rear cylinder blocks (130, 130 ') are manufactured by casting, after the manufacturing is subjected to the cutting process. That is, the outer surfaces 132 of the front and rear cylinder blocks 130 and 130 'are precisely processed through cutting.

At this time, the processing grooves 134 are formed in the front and rear cylinder blocks (130, 130 '). The processing groove 134 is formed through casting before the cutting process, and serves to prevent burrs or sharp edges from being generated in the front and rear cylinder blocks 130 and 130 'during the cutting process. .

More precisely, as shown in FIG. 3, a predetermined distance H is formed between the outer surface 132 of the front and rear cylinder blocks 130 and 130 ′ and the sealing rib 133 by the processing groove 134. The tip of the tool is prevented from contacting the sealing rib 133.

At the same time, the inclined surface 134 ′ is formed on the inner surface of the processing groove 134, so that sharp edges are prevented from occurring between the processing groove 134 and the outer surfaces 132 of the front and rear cylinder blocks 130 and 130 ′. Accordingly, burrs may be reliably prevented from occurring on the outer surfaces 132 of the front and rear cylinder blocks 130 and 130 ′ in which the processing grooves 134 are formed in the cutting process.

In this case, the working fluid compressed through the discharge hole 164 is transferred to the discharge chambers 114 and 122, and the working fluid transferred to the discharge chambers 114 and 122 is discharged through the communication hole 167. It is delivered to the muffler 168 via the (138), and is transferred from the muffler 168 through the discharge port 169 toward the condenser.

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.

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

Figure 2 is a perspective view showing the configuration of a cylinder block constituting a compressor according to the prior art.

Figure 3 is a cross-sectional view showing the configuration of a preferred embodiment of a compressor according to the present invention.

Figure 4 is a perspective view showing the configuration of the cylinder block constituting the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: compressor 110: front housing

112: shaft hole 114: discharge chamber

116: oil chamber 118: communication path

120: rear housing 122: discharge chamber

124: rotating shaft chamber 130: front cylinder block

130 ': rear cylinder block 131: shaft support hole

133: sealing rib 135: cylinder bore

134: processing groove 136: suction passage

138: discharge passage 140: rotary shaft

142: Saphan 144: Hub

145: shoe 147: euro

148: entrance 148 ': exit

160: valve unit 164: discharge hole

166: discharge lead 169: discharge port

170: fixing bolt S: swashroom

Claims (3)

Front and rear housings 110 and 120 forming an outer appearance of at least both ends of the compressor 100; Located between the front and rear housing (110, 120), the cylinder block (130, 130 ') having a swash plate chamber (S) formed therein, a plurality of cylinder bores 135 are formed to pass through the center; Rotating shaft 140 in which the swash plate 142 located in the swash plate chamber S is rotatably installed, and a flow path 147 for transmitting the working fluid sucked into the compressor 100 to the cylinder bore 135 is formed. ); A plurality of pistons 158 linearly reciprocating in the cylinder bore 135 according to the rotational motion of the swash plate 142; And In the compressor comprising: a valve unit (160) installed between the front and rear housings (110, 120) and the cylinder blocks (130, 130 ') to control the discharge of the working fluid compressed in the cylinder bore (135), The cylinder block 130 is formed with a shaft support hole 131 is inserted into the rotary shaft 140 and the sealing rib 133 around the opening inlet edge of the shaft support hole 131 in the front and rear housing (110, 120) direction Is formed by protruding, Compressor, characterized in that the processing groove 134 is formed around the sealing rib 133 on the outer surface (132) of the cylinder block 130 facing the valve unit (160). According to claim 1, wherein the inclined surface 134 'is formed on the inner surface of the processing groove 134 connected to the front end of the outer surface 132 of the cylinder block (130, 130') facing the valve unit 160 Compressor, characterized in that the width of the processing groove 134 becomes narrower toward the bottom surface of the processing groove (134). The width A of the processing groove 134 is 0.5 mm to 1.5 mm smaller than the distance C between the tip of the valve unit 160 and the sealing rib 133. And a recessed depth B of the processing groove 134 is formed in a size of 0.5 mm to 2.0 mm.

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