KR20090129830A - Compressor - Google Patents

Abstract

PURPOSE: A compressor is provided, which reduces abrasion of parts by friction between the swash plate and shoe by supplying lubricating oil between the swash plate and shoe. CONSTITUTION: A compressor(100) includes front and rear housings(110,120), a cylinder block(130), a rotary shaft(140), a plurality of pistons(158), a shoe(145), and a forming groove. The front and rear housings form appearance of both ends of the compressor. The cylinder block has a plurality of cylinder bores(135) and swash plate room. The swash plate(142) located in the swash plate room is installed in the rotary shaft to be rotated. The piston reciprocates in the bore of the cylinder according to the rotational motion of the swash plate. The shoe relatively moves about the swash plate. The forming groove is formed in the surface of the swash plate according to the relative movement route of shoe and swash plate. A Teflon coating part is formed in the forming groove.

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 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 housing 10, the rear housing 20, and the front and rear cylinder blocks 30 and 30 ′ form the skeleton and the appearance 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 20 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 20 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.

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. Bearings 46 are provided between both ends of the swash plate 42 and the cylinder blocks 30 and 30 ', respectively.

At this time, the teflon coating portion (T) is formed on the surface of the swash plate (42). The teflon coating part T is formed on both surfaces of the swash plate 42 in contact with the shoe 45, and the swash plate 42 is worn by friction between the shoe 45 and the swash plate 42. It serves to prevent. The teflon coating part (T) is formed by applying a Teflon material on the surface of the swash plate (42).

As shown in FIG. 2, in order to form the Teflon coating part T, first, the surface of the swash plate 42 is roughened and a Teflon material is applied to the surface. This is to allow the teflon coating portion (T) to adhere well to the swash plate (42).

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 is relatively high, and the tip of the discharge lead 66 is pushed and elastically deformed, thereby discharging the discharge hole 64. Open.

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. It 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.

The teflon coating portion (T) is the surface of the swash plate 42 is roughened, more precisely formed in the processing groove 42 ', the processing groove 42' is a plurality of straight lines as shown in FIG. Dogs are densely formed. However, the direction in which the surface of the swash plate 42 and the shoe 45 move relative to each other does not coincide with the forming direction of the processing groove 42 '. That is, the shoe 45 is moved while drawing a circle along the surface edge of the swash plate 42 about the rotating shaft 40 (arrow ① of Figure 2), the processing groove 42 ' It is formed on the surface of the swash plate 42 along a straight path (arrow ② in Fig. 2).

Accordingly, since the shoe 45 moves while crossing the forming path of the processing groove 42 ′ in a relative movement with the swash plate 42, the shoe 45 has greater friction with the surface of the swash plate 42. There is a problem that, as a result, the efficiency of the compressor 1 is lowered.

Of course, in order to solve this, the processing groove 42 ′ may not be formed, but in this case, the Teflon coating part T may not be firmly adhered to the surface of the swash plate 42.

In addition, since the processing groove 42 'is formed in a straight shape on the surface of the swash plate 42, both ends thereof are open to both sides of the surface of the swash plate 42, respectively. Accordingly, the lubricating oil can be easily taken out from the inside of the processing groove 42 ', so that the lubricating oil is not sufficiently supplied between the shoe 45 and the swash plate 42.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, so that the forming direction of the processing groove for Teflon coating of the swash plate coincides with the relative moving direction of the swash plate and the shoe.

Another object of the present invention is to form a closed curve for the processing groove for Teflon coating of the swash plate so that oil does not easily escape from the inside of the processing groove.

According to a feature of the present invention for achieving the object as described above, the present invention is located between the front and rear housings and the front and rear housings to form the outer appearance of at least both ends of the compressor, a plurality of cylinder bores surrounding the center Is formed so as to penetrate, the cylinder block having a swash plate chamber therein, and the swash plate located in the swash plate chamber is rotatably installed, the rotating shaft is formed with a flow path for transmitting the working fluid sucked into the compressor to the cylinder bore And a plurality of pistons linearly reciprocating in the cylinder bore according to the rotational motion of the swash plate, and a shoe provided between the swash plate and the piston to move relative to the swash plate, wherein the surface of the swash plate includes: A processing groove is formed along a relative movement path between the swash plate and the shoe, and the processing groove is formed with a teflon coating part.

The plurality of processing grooves are formed on the surface of the swash plate varying the radius around the rotation axis to form a closed curve, respectively.

The cross section of the processing groove is formed in a triangular shape.

The processing groove is formed by laser processing.

According to the compressor according to the present invention, the following effects can be expected.

In the present invention, the forming direction of the processing groove for teflon coating on the surface of the swash plate is formed in a curve along the relative movement direction of the swash plate and the shoe. Accordingly, the friction between the swash plate and the shoe is reduced by the processing groove during the relative movement of the swash plate and the shoe, thereby improving the efficiency of the compressor.

In the present invention, since the processing groove of the swash plate forms a closed curve, the lubricant does not easily escape from the inside of the processing groove. Therefore, since sufficient lubricating oil is supplied between the swash plate and the shoe, wear of parts due to friction between the swash plate and the shoe is also reduced.

In addition, in the present invention, since the processing groove of the swash plate is formed through the laser processing, it is possible to easily process only the necessary portion, and by-products are hardly generated in the processing process, there is a concern of environmental pollution compared to chemical processing such as anodizing processing There is also a diminishing effect.

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

3 is a cross-sectional view showing the configuration of a preferred embodiment of the compressor according to the present invention, Figure 4 is a perspective view showing the configuration of the rotary shaft and the swash plate coupled to the embodiment of the present invention, Figure 5 Some configurations of the swash plate and the shoe making up the embodiment are shown in cross section.

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.

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 swash plate 142 is provided to be inclined with respect to the rotation shaft 140, and serves to linearly move the piston 158 during the rotation process.

At this time, the teflon coating portion (T) is formed on the surface of the swash plate (142). The Teflon coating part (T) is formed by applying a Teflon material to the surface of the swash plate 142, the wear of the swash plate 142 by friction between the swash plate 142 and the shoe 145 to be described later It is a kind of reinforcing film to prevent.

As shown in Figure 4, the groove 143 is formed on the surface of the swash plate 142. The processing groove 143 is first processed before processing the teflon coating portion (T) to ensure that the Teflon coating portion (T) more securely adhered to the surface of the swash plate 142, the swash plate The surface of 142 is formed through laser processing or the like. This laser processing is a processing method of burning the surface of the material instantaneously using high heat, which is environmentally friendly compared to chemical methods such as anodizing, and can process only necessary parts, and has almost no by-products.

The processing groove 143 is formed on the surface of the swash plate 142 along the relative movement path of the swash plate 142 and the shoe 145 to be curved while more accurately drawing a circle. That is, the processing groove 143 is to form a closed curve of the path is formed.

In this case, the plurality of processing grooves 143 are formed densely by varying a radius about the rotation shaft 140. This is because the shoe 145 is seated on the plurality of processing grooves 143, while the friction area between the swash plate 142 and the shoe 145 is reduced, the shoe 145 is more stably seated on the surface of the rotating shaft 142. To make it possible.

And, as shown in Figure 5, the cross section of the processing groove 143 is preferably formed in a triangular shape. This is due to the processing groove 143 formed wider toward the surface of the swash plate 142, the contact area between the surface of the swash plate 142 and the bottom surface of the shoe 145 is relatively reduced between the two Friction is also made to be small. Of course, the shape of the cross section of the processing groove 143 may be formed in a semicircle or other polygonal shape.

 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 the surface edge of the swash plate 142. More precisely, the shoe 145 is relatively moved with the swash plate 142 while drawing a circle along the longitudinal direction of the processing groove 143 formed in the swash plate 142. Reference numeral 146 denotes a bearing.

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 make a straight reciprocating motion inside the cylinder bore 135. A shoe 145 is provided between the swash plate 142 and the piston 158 to reduce the friction between the swash plate 142 and the piston 158.

In addition, since the shoe 145 and the swash plate 142 are moved relative to the bottom surface of the shoe 145 in contact with the Teflon coating part T formed on the surface of the swash plate 142, the Teflon coating part T The wear of the surface of the swash plate 142 may be prevented to some extent.

At this time, the processing groove 143 for reliably sticking the Teflon coating portion (T) is formed in a circular shape on the surface of the swash plate 142 along the relative movement path of the shoe 145 and the swash plate 142, Friction between the shoe 145 and the swash plate 142 is reduced. That is, since the processing groove 143 is formed as a pair corresponding to the moving direction of the shoe 145 without opposing the movement path of the shoe 145, the shoe 145 along the processing groove 143 It may move relative to the swash plate 142.

In particular, the processing groove 143 is formed so that the formation path is concave while forming a closed curve, even if the teflon coating on the surface of the swash plate 148, the Teflon coating portion (T) along the grain of the processing groove 143 It is formed while forming a closed curve. Accordingly, the lubricating oil does not easily come out and can be kept sufficiently infiltrated into the recessed portion formed by the Teflon coating part T along the grain of the processing groove 143, and the swash plate 142 and the shoe 145 The friction between them can be reduced more effectively.

The operation of the compressor 100 will be described continuously. As the rotary shaft 140 rotates, the flow path 147 inside the rotary shaft 140 passes through the outlet 148 'and the suction passage 136, respectively. Are sequentially communicated with the cylinder bore 135. 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.

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. The muffler 168 is transferred to the muffler 168 through the discharge port 169 from the muffler 168 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.

In the above embodiment, a fixed displacement swash plate type compressor in which the inclination angle of the swash plate 142 with respect to the rotating shaft 140 is fixed has been described as an example. Can be applied.

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 rotating shaft constituting the compressor according to the prior art and the swash plate coupled thereto.

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 rotary shaft and the swash plate coupled thereto constituting an embodiment of the present invention.

5 is a cross-sectional view showing a partial configuration of the swash plate and the shoe constituting the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: compressor 110: front housing

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

135: cylinder bore 140: rotation axis

142: swash plate 143: machining groove

145: shoe 147: euro

160: valve unit 164: discharge hole

S: Swashroom T: Teflon coating

Claims (4)

Front and rear housings (110, 120) to form the outer appearance of at least both ends of the compressor (100), Located between the front and rear housings 110 and 120, the cylinder block 130 is formed so as to pass through a plurality of cylinder bores 135 around the center, and has a swash plate chamber (S) therein, Rotating shaft 140 is installed to be rotatable swash plate 142 located in the swash plate chamber (S), A plurality of pistons 158 linearly reciprocating in the cylinder bore 135 according to the rotational motion of the swash plate 142, In the compressor comprising a shoe 145 provided between the swash plate 142 and the piston 158 to move relative to the swash plate 142, The surface of the swash plate 142 is formed with a processing groove 143 along the relative movement path of the swash plate 142 and the shoe 145, the teflon coating portion (T) is formed in the processing groove 143. Compressor characterized. The compressor as claimed in claim 1, wherein a plurality of the processing grooves (143) are formed on the surface of the swash plate (142) while varying a radius about the rotating shaft (140) to form closed curves. The compressor as set forth in claim 2, wherein the cross section of the processing groove (143) is formed in a triangular shape. 4. The compressor as claimed in any one of claims 1 to 3, wherein the processing groove (143) is formed by laser processing.

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