KR101058666B1 - compressor - Google Patents

Abstract

The present invention relates to a compressor, and uses a rotating shaft 140 having a swash plate 142 to drive a piston 158 linearly reciprocating in the cylinder bore 134 formed in the cylinder block 130. In addition, a mounting hole 131 is formed through the center of the cylinder block 130, and the suction passage forming unit 150 is inserted into and fixed to the mounting hole 131 through an insert molding process. In this case, a suction passage 154 is formed in the suction passage forming unit 150 to communicate between the cylinder bore 134 and the shaft support hole 152 formed in the center of the suction passage forming unit 150. In addition, the suction passage forming unit 150 is formed of a brass material. According to the present invention, it is possible to easily form the suction passage 154 in the cylinder block 130, the workability is improved, wear between the cylinder block 130 and the rotary shaft 140 is reduced and the rotary shaft 140 The smooth rotation of the compressor 100 is possible, and the durability and operation performance of the compressor 100 are improved.

Compressor, Swash Plate, Suction Passage, Insert Mold

Description

Compressor {Compressor}

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 an exploded perspective view showing the configuration of the cylinder block and the suction passage forming portion constituting an embodiment of the present invention.

Figure 5 is a perspective view showing the configuration of the cylinder block and the suction passage forming unit shown in Figure 4 coupled state.

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 131,131': Mounting hole

132: fastening groove 134: cylinder bore

138: discharge passage 140: rotary shaft

142: Saphan 144: Hub

145: shoe 147: euro

148: entrance 148 ': exit

150,150 ': suction passage forming unit 151,151': body

152,152 ': Shaft support 153,153': Communication rib

154,154 ': Suction passage 155,155': Contact plate

158: piston 160: valve unit

164: discharge hole 166: discharge lead

170: fixing bolt S: swashroom

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, there is a reciprocating type that actually compresses the working fluid and a rotary type that performs the compression while the rotary motion performs the reciprocating motion. 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 linearly reciprocating by the rotation of the rotary shaft 40 is installed in the cylinder bore 34 of the front and rear cylinder blocks (30, 30 '), and the compressed working fluid of the cylinder bore (34) 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 an approximately ring-shaped region, and selectively communicates with each cylinder bore 34 of the front cylinder block 30 through the valve unit 60.

The rear housing 30 is mounted on one surface of the rear cylinder block 30 '. The discharge chamber 22 is recessed on the surface of the rear housing 30 facing the rear cylinder block 30 '. The discharge chamber 22 is selectively formed to communicate with the cylinder bores 34 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. The inner diameter of the shaft support hole 32 is designed to be in close contact with the outer surface of the rotary shaft 40.

A plurality of cylindrical cylinder bores 34 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 34 are formed at positions corresponding to the front and rear cylinder blocks 30 and 30 ', respectively.

The cylinder bore 34 and the shaft support hole 32 are connected to 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 34, respectively.

At this time, as shown in Figure 2, the suction passage 36 is formed in the cylinder block (30, 30 ') using a tool such as a milling machine. More precisely, the suction passage 36 is formed to be inclined through the cylinder bore 34 toward the shaft support hole 32 through milling.

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 34 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 connection 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, bearings 46 and 46 'are respectively provided between both ends of the swash plate 42 and the cylinder blocks 30 and 30'. This causes the rotary shaft 40 to be rotatably supported relative to the cylinder blocks 30 and 30 'because the swash plate 42 rotates back and forth while the swash plate 42 rotates in an inclined state while the compressor 1 is being driven. It is to make it possible.

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. As shown in FIG. 2, an inlet 48 and an outlet 48 ′ are formed on an 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 'must be shaped in accordance with the compression order of the working fluid proceeding in each cylinder bore 34.

At this time, the Teflon coating portion (T) is formed on the outer circumferential surface of the rotating shaft (40). The teflon coating portion (T) is formed on the outer circumferential surface of the rotary shaft 40, more precisely on the outer surface of the rotary shaft 40 in contact with the inner diameter of the shaft support hole 32, the rotary shaft 40 and the shaft support hole ( It prevents abrasion between the 32 and enables the smooth rotation of the rotating shaft (40).

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.

The piston 50 linearly reciprocates in the cylinder bore 34. The piston 50 has a substantially cylindrical shape corresponding to the inside of the cylinder bore 34, and both ends thereof are positioned at the cylinder bores 34 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 (34). 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 34 to the outside of the cylinder bore 34. 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 34. 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 34 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 34.

At this time, as the rotary shaft 40 rotates, the flow passage 47 inside the rotary shaft 40 communicates with the cylinder bore 34 through the outlet 48 'and the suction passage 36. The communication between the flow passage 47 and the cylinder bore 34 allows the working fluid sucked into the swash plate chamber 31 to be transferred to the cylinder bore 34. For reference, the working fluid is sucked into the cylinder bore 34 when the piston 50 is located at the bottom dead center of the corresponding cylinder bore 34.

When the working fluid is transferred to the cylinder bore 34, and the piston 50 of the corresponding cylinder bore 34 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 34, the pressure inside the cylinder bore 34 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. It is delivered to the muffler 68 via the discharge passage 38, and is transferred from the muffler 68 through the outlet 69 to the condenser.

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

The suction passage 36 is formed through milling as described above in the cylinder blocks 30 and 30 '. That is, the suction passage 36 is formed on the cylinder blocks 30 and 30 'manufactured by die casting by using a tool such as a milling machine.

However, the molding of the suction passage 36 is performed by using a separate tool for the already manufactured cylinder blocks 30 and 30 ', so that the machining process is very cumbersome and the process time increases.

In particular, the suction passage 36 should be formed relatively narrow compared to the size of the cylinder bore 34 of the cylinder block (30, 30 '), there is a problem that it is more difficult to precisely process.

In addition, in order to prevent abrasion between the rotary shaft 40 and the shaft support hole 32, since the Teflon coating portion (T) must be separately processed on the outer circumferential surface of the rotary shaft 40, the labor cost increases and the manufacturing cost increases. There is a problem.

In addition, the compressor 1 is operated while the bearings 46 and 46 'are in contact with one side of the cylinder blocks 30 and 30', so that the bearings 46 and 46 'and the cylinder blocks 30 and 30 are in contact with each other. There is a problem that wear occurs between ') and the durability of the compressor 1 is lowered.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, so that the suction passage communicating between the cylinder bore and the shaft support hole of the cylinder block can be formed using the suction passage forming portion in the cylinder block. will be.

Another object of the present invention is to allow the suction passage forming unit mounted on the cylinder block to rotatably support the rotating shaft.

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 and having a plurality of cylinder bores passing through the center; A rotating shaft on which a swash plate is installed to be rotatable and in which a flow path for transferring the working fluid sucked into the compressor to the cylinder bore is formed; And a plurality of pistons linearly reciprocating in the cylinder bore according to the rotational motion of the swash plate, wherein the suction passage forming unit is inserted into and fixed to the insert hole formed through the center of the cylinder block. The suction passage forming portion is a body through which the shaft support hole is formed; A plurality of communication ribs are formed to protrude along the outer circumferential surface of the body and are inserted into a fastening groove recessed from the mounting hole toward the cylinder bore, and a suction passage is formed therein to connect the shaft support hole and the cylinder bore. It is configured to include.
The suction passage forming portion is formed of a brass material.
The body of the suction passage forming portion is formed so that the contact plate protrudes toward the swash plate to contact the thrust bearings provided on both sides of the hub of the swash plate.
In the compressor according to the present invention having such a configuration, the suction passage can be easily processed in the cylinder block, thereby improving workability, reducing wear between the cylinder block, the rotating shaft, and the bearing, and allowing the rotating shaft to be smoothly rotated. There is an advantage that the durability and operation performance is improved.

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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 an exploded perspective view showing the configuration of the cylinder block and the suction passage forming portion constituting the embodiment of the present invention, Figure 5 The configuration of the cylinder block and the suction passage forming unit shown in Figure 4 is shown in a perspective view.

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.

A piston 158 linearly reciprocating in conjunction with the rotation of the rotary shaft 140 is installed in the cylinder bore 134 of the front and rear cylinder blocks (130, 130 '), and the discharge of the working fluid compressed by the cylinder bore is a 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. At this time, the shaft hole 112 is in communication with the shaft support hole 152 of the suction passage forming unit 150 to be described below.

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 134 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 ′, that is, on the opposite surface 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 ′. The discharge chamber 122 is formed to have a substantially ring-shaped area and selectively communicates with the cylinder bores 134 formed in the rear cylinder block 130 'through the valve unit 160.

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.

Mounting holes 131 and 131 'are formed in the front and rear cylinder blocks 130 and 130'. The mounting holes 131 and 131 'are formed to penetrate through the centers of the front and rear cylinder blocks 130 and 130', and the suction passage forming unit 150 to be described later is fixed to the insert mold.

As shown in FIG. 4, an inner surface of the mounting hole 131 of the front cylinder block 130 is formed such that the fastening groove 132 penetrates toward each cylinder bore 134 as a center. The fastening groove 132 is a portion into which the communication rib 153 of the suction passage forming unit 150 is inserted. In this embodiment, a total of five fastening grooves 132 are formed. Of course, the communication rib 153 is formed by the number corresponding to the cylinder bore 134. At this time, the fastening groove 132 is opened in the direction of the front housing 110 before the communication rib 153 of the suction passage forming unit 150 is inserted, but as shown in FIG. ) Is inserted into the mounting hole 131, the portion opened by the communication rib 153 is filled.

A stopper 133 is formed at one side of the fastening groove 132. The stopper 133 is formed in the fastening groove 132, more precisely, on the surface of the front cylinder block 130 facing the swash plate chamber (S). The stopper 133 prevents the suction passage forming unit 150 from protruding into the swash plate chamber S, thereby regulating the degree to which the suction passage forming unit 150 is inserted into the mounting hole 131. do. In addition, the mounting hole 131, the fastening groove 132, and the stopper 133 as described above are similarly formed in the rear cylinder block 130 ′.

The front and rear cylinder blocks 130 and 130 'are formed by passing a plurality of cylindrical cylinder bores 134 through the mounting holes 131 and 131' in the direction of forming the mounting holes 131 and 131 '. In this case, the cylinder bore 134 is formed in a position corresponding to the front and rear cylinder blocks (130, 130 '), respectively. The cylinder bore 134 is connected to the shaft support hole 152 of the suction passage forming unit 150 to be described below through the communication rib 153 of the suction passage forming unit 150.

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 134 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. A connection 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 and 146 'are provided between both ends of the swash plate 142 and the cylinder blocks 130 and 130', respectively. Since the swash plate 142 rotates in an inclined state while the compressor 100 is being driven, the piston 158 moves forward and backward, so that the rotation shaft 140 can be rotatably supported with respect to the cylinder blocks 130 and 130 '. It is to. Although not shown, in the present embodiment, the bearings 146 and 146 'are installed between the first race in contact with the cylinder blocks 130 and 130', the second race in contact with the swash plate 142, and the first and second races. Thrust bearings consisting of ball holders.

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 passage 147, the swash plate chamber (S), and the suction passage 154 to be described later formed in the communication rib 153, the rotary shaft 140 is opened to the outer surface of the rotary shaft 140, respectively Inlet 148 and outlet 148 'are 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.

Suction passage forming units 150 and 150 'are coupled to the front and rear cylinder blocks 130 and 130'. The suction passage forming units 150 and 150 'are inserted into the mounting holes 131 and 131' formed in the front and rear cylinder blocks 130 and 130 ', respectively, and are manufactured separately from the front and rear cylinder blocks 130 and 130'.

That is, in the state in which the suction passage forming unit 150, 150 'is manufactured separately from the cylinder blocks 130 and 130', the cylinder blocks 130 and 130 through an insert molding process in the process of manufacturing the cylinder blocks 130 and 130 '. Is fixed to '). In other words, by coupling the suction passage forming unit 150 having the suction passage 154 to the cylinder blocks 130 and 130 ', the suction passage using a tool such as a separate milling machine to the front and rear cylinder blocks 130 and 130'. It becomes unnecessary to process 154.

As shown in Figure 4, the appearance and skeleton of the suction passage forming unit 150 is formed by the body 151. The body 151 has a substantially cylindrical shape and is a portion inserted into the fastening hole 131 substantially. The body 151 has a shaft support hole 152 is formed through the center thereof. The rotary shaft 140 penetrates the shaft support hole 152. The inner diameter of the shaft support hole 152 is designed to be in close contact with the outer surface of the rotary shaft 140.

A communication rib 153 is formed on the outer circumferential surface of the body 151. When the suction passage forming unit 150 is inserted into the cylinder block 130, the communication rib 153 forms a part of the inner circumferential surface of the cylinder bore 134. In other words, the communication rib 153 is formed around the outer circumferential surface of the body 151 to have a position corresponding to the cylinder bore 134. Of course, the communication rib 153 is formed by the number corresponding to the number of the cylinder bore 134, a total of five are formed in this embodiment.

Suction passage 154 is formed in the communication rib 153. The suction passage 154 is formed to penetrate through the communication rib 153, and communicates between the cylinder bore 134 and the shaft support hole 152 to the working fluid through the inside of the rotating shaft 140 Each is transferred to the cylinder bores 134.

The body 151 is formed with a contact plate 155 to protrude in the swash plate chamber (S) direction. The contact plate 155 is in contact with the bearing 146 provided on both sides of the hub 144 of the swash plate 142, and is formed in a substantially disc shape. The contact plate 155 contacts the bearing 146 to minimize wear between the cylinder block 130 and the bearing 146 that may occur during operation of the compressor 100.

At this time, the suction passage forming unit 150 is preferably formed of a brass material. That is, the suction passage forming unit 150 is to produce a brass material having excellent wear resistance and lubricity through the die-casting process, and insert molding in the manufacturing process of the cylinder block 130. That is, since the suction passage forming unit 150 has excellent wear resistance and lubricity, there is no need to separately apply Teflon coating to the outer circumferential surface of the rotating shaft 140. Of course, the suction passage forming unit 150 may be made of various other lubricity alloys. In addition, a total of two suction passage forming units 150 are formed, and the two suction passage forming units 150 and 150 'are provided in the front and rear cylinder blocks 130 and 130', respectively.

The piston 158 is a linear reciprocating motion inside the cylinder bore 134. The piston 158 has a substantially cylindrical shape corresponding to the inside of the cylinder bore 134, and both ends thereof are positioned at the cylinder bores 134 of the front and rear cylinder blocks 130 and 130 ′, respectively. That is, both ends of each of the one piston 158 serves to compress the working fluid in the cylinder bore (134). For reference, when compression occurs in the cylinder bore 134 where one end of one piston 158 is positioned, the suction process is performed in the cylinder bore 134 where the other end is positioned. The piston 158 is coupled to the middle of the shoe 145, the linear reciprocating motion in the cylinder bore 134 in accordance with the rotation of the swash plate 142.

The valve unit 160 is used to control the discharge of the working fluid compressed in the cylinder bore 134 to the outside of the cylinder bore 134. 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 134. 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 134 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 134.

At this time, the rotation of the swash plate 142 is made smoothly by the bearings (146,146 ') in contact with the suction passage forming unit (150,150'), because the suction passage forming unit 150 is made of brass material It can be done more effectively. That is, the contact plates 155 and 155 'of the suction passage forming portions 150 and 150' and the bearings 146 and 146 'are operated in contact with each other, and the suction passage forming portions 150 and 150' are made of brass having good abrasion resistance and lubricity. Since the swash plate 142 rotates more smoothly, wear between the bearings 146 and 146 'and the cylinder blocks 130 and 130' can be prevented.

As the rotary shaft 140 rotates, the flow passage 147 inside the rotary shaft 140 sequentially communicates with the respective cylinder bores 134 through the outlet 148 ′ and the suction passage 154. That is, the cylinder bore 134 and the flow passage 147 communicate with each other through the suction passages 154 and 154 'formed in the communication ribs 153 and 153' of the outlet 148 'and the suction passage forming portions 150 and 150'. will be.

At this time, the rotary shaft 140 is supported by the inner surface of the shaft support holes (152, 152 ') to rotate, the shaft support holes (152, 152') in the suction passage forming unit (150, 150 ') made of a good lubricity brass material It is formed. Accordingly, the rotating shaft 140 can be rotated more smoothly inside the compressor 100.

Meanwhile, the suction passages 154 and 154 'are formed in the suction passage forming units 150 and 150', and the suction passage forming units 150 and 150 'are separate from the cylinder blocks 130 and 130' and are inserted through insert molds. It is coupled to the cylinder blocks 130 and 130 '. This means that it is not necessary to perform milling or the like separately to form the suction passages 154 and 154 'in the cylinder blocks 130 and 130'.

The communication between the flow path 147 and the cylinder bore 134 allows the working fluid delivered from the outside of the compressor 100 to be transferred to the cylinder bore 134. For reference, the working fluid is sucked into the cylinder bore 134 when the piston 158 is located at the bottom dead center of the corresponding cylinder bore 134.

When the working fluid is transferred to the cylinder bore 134, and the piston 158 of the corresponding cylinder bore 134 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 134, the pressure inside the cylinder bore 134 becomes relatively high, and the discharge hole 164 is opened while the tip of the discharge lead 166 is pushed and elastically deformed. 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.

For example, in the above embodiment, a general swash plate compressor having a constant compression volume has been described as an example, but the present invention is not necessarily limited thereto, and the present invention may be applied to a so-called variable displacement compressor that may change the compression volume. .

According to the compressor according to the present invention as described in detail above, the following effects can be expected.

In the present invention, the suction passage forming unit is manufactured separately from the cylinder block and the suction passage is formed, and is mounted to the cylinder block through the insert molding process. Therefore, after the cylinder block is manufactured, it is not necessary to process the suction passage through a separate milling process, so that the suction passage can be easily processed, and workability is improved.

In addition, since the suction passage is formed in the process of manufacturing the suction passage forming unit by die casting, the numerical value and position desired by the designer can be realized more precisely than through a separate process such as milling, and thus the compressor There is an effect of improving the efficiency.

In addition, in the present invention, since the suction passage forming part is formed of a brass material having excellent wear resistance and lubricity, wear between the rotating shaft and the cylinder block and between the bearing and the cylinder block can be prevented and the rotating operation can be made more smoothly. And the operation reliability is also improved.

Claims (3)

Front and rear housings 110 and 120 forming an outer appearance of at least both ends of the compressor 100; A cylinder block positioned between the front and rear housings 110 and 120 and formed to penetrate a plurality of cylinder bores 134 through a center thereof; A rotating shaft 140 having a swash plate 142 rotatably installed therein and having a flow path 147 for transferring the working fluid sucked into the compressor 100 to the cylinder bore 134; And In the compressor comprising; a plurality of pistons 158 linearly reciprocating in the cylinder bore 134 according to the rotational movement of the swash plate 142, The suction passage forming unit 150 is inserted into the insert mold and fixed to the mounting hole 131 formed through the center of the cylinder block. The suction passage forming unit 150 is A body 151 through which the shaft support hole 152 is formed; A plurality of protrusions are formed along the outer circumferential surface of the body 151 to be inserted into the fastening groove 132 recessed toward the cylinder bore 134 from the mounting hole 131, and the suction passage 154 penetrates therein. The compressor, characterized in that it comprises a communication rib (153) for connecting the shaft support hole (152) and the cylinder bore (134). The compressor as claimed in claim 1, wherein the suction passage forming unit is made of brass. The swash plate of claim 1 or 2, wherein the body 151 of the suction passage forming unit 150 contacts the thrust bearing 146 provided on both sides of the hub 144 of the swash plate 142. Compressor, characterized in that the contact plate 155 is formed to protrude toward the (142).

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