KR20080029077A - Compressor - Google Patents

Abstract

A compressor is provided to connect first and second slots of cylinder blocks to a refrigerant path of a driving shaft according to the rotation of the driving shaft for discharging compressed refrigerant out of cylinder bores via discharge holes of a valve element, thereby preventing the generation of resistance in the valve element even in the case of refrigerant discharge and accordingly reducing the loss of pressure. A compressor includes cylinder bores(131,141) of front and rear cylinder blocks(130,140) having a plurality of first slots(135,145) connected to a refrigerant path(155) formed in an outer surface of a driving shaft and a plurality of second slots(137,147) connecting the refrigerant path to discharge chambers(111,121) of front and rear housings. A valve element(180) has a suction hole(185) connecting suction chambers(112,122) of the front and rear housings(110,120) to the cylinder bores, and a plurality of discharge holes(187) connecting outlets of the second slots to the discharge chambers.

Description

Compressor

1 is a configuration diagram showing a typical swash plate type compressor.

FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1. FIG.

3 is a configuration diagram showing a part of a compressor according to the present invention.

4 is a view showing a path when refrigerant is sucked in the compressor of the present invention.

5 is a view showing a path at the time of refrigerant discharge in the compressor of the present invention.

6 is an exploded perspective view showing a valve member which is a main component of the present invention.

<Explanation of symbols for the main parts of the drawings>

110,120: housing

111,121: discharge chamber

112,122: suction chamber

130,140: Cylinder block

131,141: Cylinder Bore

133,143: shaft supporter

135,145: first slot

137,147: second slot

150: drive shaft

155: refrigerant passage

170: piston

180: valve member

181: valve guide

182: outer gasket

182 ': guide hole

183: internal gasket

183 ': lead stopper

184: suction lead

185: suction hole

187: discharge hole

The present invention relates to a compressor for compressing and discharging a refrigerant in order to operate an air conditioner for a vehicle. In particular, the structure of the suction valve is simplified to reduce the suction resistance and to minimize the resistance of the valve member during suction and discharge of the refrigerant. It is about one compressor to help reduce.

In general, a vehicle air conditioner is provided with a compressor that is operated by the power of the engine for the circulation of the refrigerant to compress and discharge the refrigerant. There are various types of compressors according to their types. Typically, a swash plate type compressor in which a piston reciprocates with the rotation of an inclined swash plate, and a scroll compressor and rotary vane compressed by a rotational motion of two scrolls. And a vane rotary compressor for compressing. The swash plate type compressor is mainly used in the automotive air conditioner, and its structure is as follows.

A typical swash plate type compressor, as shown in Figs. 1 and 2, is coupled to the front housing 10, the front cylinder block 20 is built, the front housing 10 and the rear cylinder block 20a is built A plurality of pistons 50 reciprocating within the rear housing 10a, the plurality of cylinder bores 21 formed in the front and rear cylinder blocks 20, 20a, and the drive shaft 30, respectively. ) And the swash plate 40 coupled to the piston 50 via the shoe 45 is installed obliquely coupled to the circumference, and the front and rear housings 10 and 10a and the front and rear cylinder blocks 20 Valve unit 60 is installed between the (20a) and the upper side of the outer surface of the rear housing (10a) to supply the refrigerant transferred from the evaporator during the suction stroke of the piston 50 into the compressor (1) In the compression stroke of the piston 50, the muffle to discharge the refrigerant compressed in the compressor 1 toward the condenser It is composed of 70.

On the other hand, the front and rear cylinder block 20 (20) (so that the refrigerant supplied to the swash plate chamber 24 provided between the front and rear cylinder blocks 20, 20a can flow to each suction chamber 11 ( A plurality of suction passages 22 are formed in 20a, and the second discharge chamber 12b of the front and rear housings 10 and 10a is formed through the front and rear cylinder blocks 20 and 20a. It is communicated with each other by the connecting passage 23. Therefore, the suction and compression of the refrigerant may be simultaneously performed in the bore 21 of the front and rear cylinder blocks 20 and 20a according to the reciprocating motion of the piston 50.

The conventional swash plate compressor configured as described above compresses the refrigerant through the following process.

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

Since the suction lead valve is opened during the suction stroke of the piston 50, the refrigerant of the suction chamber 11 is sucked into the cylinder bore 21 through the refrigerant suction hole of the valve plate. When the piston 50 is compressed, the refrigerant inside the cylinder bore 21 is compressed. The discharge lead valve opens, and the refrigerant passes through the refrigerant discharge hole of the valve plate. Flows into the first discharge chamber 12a. The refrigerant flowing into the first discharge chamber 12a is discharged to the discharge portion of the muffler 70 through the refrigerant discharge port 72 of the muffler 70 through the second discharge chamber 12b and then flows to the condenser. .

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

However, the conventional compressor (1) is a suction of the refrigerant due to the loss due to the suction resistance caused by the complicated refrigerant flow path inside, the loss due to the elastic resistance of the suction lead valve during the opening and closing action of the valve unit (60). There was a problem that the volumetric efficiency is reduced.

In addition, there is a problem in that the structure of the valve unit is complicated and the number of parts is large, and a loss due to elastic resistance of the discharge reed valve is generated during refrigerant discharge.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to provide a compressor that simplifies a refrigerant intake valve and forms a discharge flow path on a drive shaft to reduce the number of parts and reduce the resistance of the discharge refrigerant.

According to the compressor of the present invention for achieving the above object, the drive shaft is coupled to the swash plate to be rotated in the swash plate chamber inclined; Front and rear cylinder blocks disposed on both sides of the swash plate chamber and rotatably supporting the drive shaft through a central shaft support hole, and having a plurality of cylinder bores along a circumferential direction; A plurality of pistons mounted on an outer circumference of the swash plate and reciprocating in the cylinder bore in conjunction with a rotational movement of the swash plate; A valve member connected to the movement of the piston to allow suction and discharge of the refrigerant to occur; And a front and rear housings coupled to both sides of the front and rear cylinder blocks, respectively, having discharge chambers and suction chambers formed therein, wherein the cylinder bore communicates a refrigerant passage formed on an outer surface of the drive shaft. A plurality of first slots and a plurality of second slots for communicating the refrigerant passages with the discharge chambers of the front and rear housings are respectively formed; The valve member may include a suction hole for communicating the suction chambers of the front and rear housings and the cylinder bore, and a plurality of discharge holes for communicating the outlet of the second slot and the discharge chamber.

In addition, according to the compressor of the present invention, the valve member is a valve guide provided between the front and rear housings and the front and rear cylinders, an outer gasket provided between the front and rear housings and the valve guide, and the valve guide And an inner gasket provided between the front and rear cylinder blocks, a plurality of suction leads moved back and forth within the suction hole of the valve guide to control the suction of refrigerant, and installed in the suction hole of the internal gasket. It characterized in that it comprises a lead stopper to prevent the separation of.

In addition, according to the compressor of the present invention, the refrigerant passage is characterized in that the first slot and the second slot of the cylinder bore to communicate when the refrigerant in the cylinder bore is compressed at an appropriate compression ratio.

Hereinafter, the compressor of the present invention will be described with reference to the accompanying drawings.

Figure 3 is a block diagram showing a part of the compressor according to the present invention, Figures 4 and 5 is a view showing a refrigerant path during the refrigerant suction and refrigerant discharge in the compressor of the present invention, Figure 6 is a view of the present invention It is an exploded perspective view which shows the valve member which is a principal structure.

Components not shown in FIGS. 3 to 5 will be described with reference to the compressors shown in FIGS. 1 and 2.

The compressor according to the present invention includes a drive shaft 150 to which the swash plate 160 rotating in the swash plate chamber 136 is inclinedly coupled; It is disposed on both sides of the swash plate chamber 160 and rotatably supports the drive shaft 150 through a central shaft support hole (133, 143), a plurality of cylinder bores (131, 141) along the circumferential direction Front and rear cylinder blocks 130 and 140 are provided; A plurality of pistons (170) mounted on an outer circumference of the swash plate (136) via a shoe (165) and reciprocating in the cylinder bores (131, 141) in conjunction with a rotational movement of the swash plate; A valve member 180 linked with the movement of the piston 170 to allow suction and discharge of the refrigerant to occur; The front and rear housings 110 and 120 are coupled to both sides of the front and rear cylinder blocks 130 and 140, respectively, and discharge chambers 111 and 121 and suction chambers 112 and 122 are formed therein, respectively. It includes;

Here, the plurality of first slots 135 communicating the cylinder bores 131 and 141 and the refrigerant passage 155 formed on the outer surface of the driving shaft 150 to the front and rear cylinder blocks 130 and 140. A plurality of second slots 137 and 147 communicating 145 and the refrigerant passage and the discharge chambers 111 and 121 of the front and rear housings 110 and 120 are formed, respectively.

In addition, a valve member 180 is installed between the front and rear housings 110 and 120 and the front and rear cylinder blocks 130 and 140 to control the access of the refrigerant. The valve member 180 may include a suction hole 185 and a second portion communicating the suction chambers 112 and 122 of the front and rear housings 110 and 120 and the cylinder bores 131 and 141. A plurality of discharge holes 187 for communicating the outlets of the slots 137 and 147 with the discharge chambers 111 and 121, and the piston 150 is moved from the front and rear housings 110 and 120. Only when away from the suction hole 185 is opened to allow the refrigerant to be sucked.

The valve member 180 may include a valve guide 181 installed between the front and rear housings 110 and 120 and the front and rear cylinder blocks 130 and 140, and the front and rear housings and the valve guides. An external gasket 182 disposed between the internal gasket 183 installed between the valve guide and the front and rear cylinder blocks 130 and 140 and a refrigerant moved back and forth within the suction hole of the valve guide. A plurality of suction leads 184 for intermittent suction and a lead stopper 183 'installed in the suction hole of the internal gasket 183 to prevent the suction lead 184 from being separated. In this case, the suction lead 184 is formed in a conical shape or a tapered shape of a trapezoidal cross section, and the outer gasket 182 is formed with a tapered guide hole 182 ′ corresponding to the distal end of the suction lead 184. do. In addition, the valve guide 181 is formed to have a thickness corresponding to the suction lead 184 so that the suction lead 184 can be moved back and forth inside the suction hole.

On the other hand, the refrigerant passage 155 formed in the drive shaft 150, the first slot 135 of the cylinder bore when the refrigerant in the cylinder bore is compressed to an appropriate compression ratio, for example 5: 1 to 4: 1 145 and the second slots 137 and 147 to communicate with each other.

The compressor of the present invention configured as described above sucks and discharges the refrigerant using a disk-shaped valve member, thereby minimizing pressure loss due to the suction and discharge of the refrigerant.

When the piston 170 moves away from the front and rear housings 110 and 120 as the drive shaft 150 rotates, a negative pressure is formed in the cylinder bores 131 and 141, and the valve member The suction lead 184 of 180 is separated from the guide hole 182 ′ of the outer gasket 182. Accordingly, the refrigerant in the suction chambers 112 and 122 of the front and rear housings 110 and 120 flows into the cylinder bores 131 and 141 along the suction hole 185 of the valve unit 180. do. At this time, the suction lead 184 is not separated from the suction hole 185 of the valve unit 180 due to the lead stopper 183 ′ installed in the inner gasket 183.

Thereafter, when the piston 170 moves in the front and rear housings 110 and 120, the suction lead 184 of the valve unit 180 is guided to the guide hole 182 ′ of the outer gasket 182. In close contact with each other, the suction hole 185 of the valve unit 180 is blocked. Therefore, the refrigerant inside the cylinder bores 131 and 141 is compressed, and the compressed refrigerant flows in the direction of the drive shaft 150 through the first slots 135 and 145. When the refrigerant compression ratio inside the cylinder bores 131 and 141 is compressed to be 5: 1 to 4: 1, the refrigerant passage 155 of the drive shaft 150 is formed with the first slots 135 and 145. Since the two slots 137 and 147 communicate with each other, the compressed refrigerant inside the cylinder bores 131 and 141 is connected to the first slot 135 and 145 and the refrigerant passage 155 and the second slot 137 ( It passes through the discharge hole 187 of the valve unit 180 through the 147 to the discharge chamber 111, 121 of the front and rear housing 110, 120. The compressed refrigerant in the discharge chambers 111 and 121 is supplied to the condenser of the air conditioning apparatus through a discharge port (not shown) to effect air conditioning.

Although the preferred embodiment of the present invention has been described above, the scope of the present invention is not limited only to such specific embodiments, and those skilled in the art may appropriately change within the scope described in the claims of the present invention. This would be possible.

As described above, according to the compressor of the present invention, the structure of the suction valve is simplified to reduce the suction resistance.

In addition, according to the compressor of the present invention, the first slot and the second slot of the cylinder block is in communication with the refrigerant passage of the drive shaft in accordance with the rotation of the drive shaft to discharge the compressed refrigerant inside the cylinder bore through the discharge hole, Even when released, there is no effect of reducing the pressure loss in the valve member.

In addition, according to the compressor of the present invention, there is another effect that the flow path of the refrigerant is simplified and the machining of the cylinder block and the drive shaft is easy.

Claims (3)

A drive shaft 150 to which the swash plate 160 rotating in the swash plate chamber 136 is inclinedly coupled; It is disposed on both sides of the swash plate chamber 160 and rotatably supports the drive shaft 150 through a central shaft support hole (133, 143), a plurality of cylinder bores (131, 141) along the circumferential direction Front and rear cylinder blocks 130 and 140 are provided; A plurality of pistons (170) mounted on an outer circumference of the swash plate (160) via a shoe (165) and reciprocating in the cylinder bores (131, 141) in conjunction with a rotational movement of the swash plate; A valve member 180 linked with the movement of the piston 170 to allow suction and discharge of the refrigerant to occur; The front and rear housings 110 and 120 are coupled to both sides of the front and rear cylinder blocks 130 and 140, respectively, and discharge chambers 111 and 121 and suction chambers 112 and 122 are formed therein, respectively. In the compressor comprising; The cylinder bores 131 and 141 may include a plurality of first slots 135 and 145 communicating with the refrigerant passage 155 formed on the outer surface of the drive shaft 150, the refrigerant passage, and the front and rear housings. A plurality of second slots 137 and 147 communicating with the discharge chambers 111 and 121 of the 110 and 120 are formed, respectively. In the valve member 180, a suction hole 185 and the second for communicating the suction chambers 112 and 122 of the front and rear housings 110 and 120 and the cylinder bores 131 and 141, respectively. And a plurality of discharge holes (187) for communicating the outlet of the slot (137) (147) and the discharge chamber (111) (121). The method of claim 1, The valve member 180 may include a valve guide 181 installed between the front and rear housings 110 and 120 and the front and rear cylinder blocks 130 and 140, and the front and rear housings and the valve guides. An external gasket 182 disposed between the internal gasket 183 installed between the valve guide and the front and rear cylinder blocks 130 and 140 and a refrigerant moved back and forth within the suction hole of the valve guide. A plurality of suction leads 184 for intermittent suction and a lead stopper 183 'installed in the suction hole of the internal gasket 183 to prevent separation of the suction leads 184. compressor. The method of claim 1, The refrigerant passage 155 may include the first slots 135 and 145 and the second slots of the cylinder bores 131 and 141 when the refrigerant in the cylinder bores 131 and 141 is compressed at an appropriate compression ratio. And a slot (137) (147) to communicate.

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