KR20070023006A - Compressor - Google Patents

Abstract

The present invention relates to a compressor, and more particularly, by forming a support rib to support the retainer of the discharge-side gasket in the lower region of the discharge chamber of the front and rear housings in which the liquid refrigerant gathers during use after long-term storage of the air conditioner. The present invention relates to a compressor that prevents damage to components and improves durability when compression occurs.

Accordingly, the present invention provides a cylinder block installed between the front and rear housings 110 and 110a and the front and rear housings 110 and 110a in which the suction chamber 111 and the discharge chamber 112 are formed. And a plurality of pistons reciprocating in conjunction with the rotational motion of the swash plate 140 installed in the cylinder bore 121 of the cylinder block 120 and 120a and rotating together with the drive shaft 130. 150 is installed between the front and rear housings 110 and 110a and the cylinder blocks 120 and 120a and is disposed on both sides of the valve plate 161 to form a refrigerant suction hole 161a and a refrigerant discharge hole. A valve unit 160 having a suction lead valve 163 and a discharge lead valve 162 for opening and closing 161b, and a retainer installed to support the discharge lead valve 162 on one side of the valve unit 160. 166a), wherein the discharge chamber 112 of the front and rear housings 110 and 110a has a component when liquid compression occurs due to liquid refrigerant. It is characterized in that the support means 117 for supporting the retainer (166a) is formed to prevent breakage of the.

Compressor, Front and Rear Housing, Discharge Chamber, Gasket, Retainer, Support Rib

Description

Compressor

1 is a cross-sectional view showing a conventional compressor,

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

3 is a sectional view showing a compressor according to the present invention;

4 is a cross-sectional view taken along line B-B in FIG. 3;

5 is an exploded perspective view showing a valve unit and a gasket in the compressor according to the present invention.

<Description of Signs of Major Parts of Drawings>

100: compressor 110: front housing

110a: rear housing 111: suction chamber

112: discharge chamber 112a: first discharge chamber

112b: second discharge chamber 112c: discharge hole

113: bulkhead

115: fixing hole 116: bolt fastener

117: support means 117a: support rib

120: front cylinder block 120a: rear cylinder block

121: cylinder bore 122: suction passage

123: passage 124: tribunal

125: support ball 126: needle roller bearing

130: drive shaft 140: swash plate

145: shoe 150: piston

160: valve unit 161: valve plate

161a: refrigerant suction hole 161b: refrigerant discharge hole

162: discharge lead valve 162a, 163a: valve plate

163: suction lead valve 164: fixed pin

165,166: Gasket

166a: retainer

170: muffler

171: refrigerant inlet 172: refrigerant outlet

180: bolt

The present invention relates to a compressor, and more particularly, by forming a support rib to support the retainer of the discharge-side gasket in the lower region of the discharge chamber of the front and rear housings in which the liquid refrigerant gathers during use after long-term storage of the air conditioner. The present invention relates to a compressor that prevents damage to components and improves durability when compression occurs.

In general, a compressor for automobiles sucks refrigerant gas discharged after evaporation is completed from an evaporator, converts the refrigerant gas into a refrigerant gas in a high temperature and high pressure state that is easily liquefied, and discharges the refrigerant gas.

There are various kinds of such compressors, such as a swash plate type compressor in which a piston reciprocates by the rotation of an inclined swash plate, a scroll compressor compressed by a rotational motion of two scrolls, and a rotary compressor compressed by a rotary vane. .

Among these, the reciprocating compressor that compresses the refrigerant according to the reciprocating motion of the piston includes crank type and wobble plate type in addition to the swash plate type compressor, and the swash plate type compressor also has a fixed capacity swash plate type compressor and a variable capacity type according to the use. And swash plate compressors.

1 to 2 is a view showing a conventional fixed displacement swash plate compressor, briefly described with reference to the following.

As shown, the swash plate compressor 1 is coupled to the front housing 10, the front cylinder block 20 is built, the rear housing is coupled to the front housing 10 and the rear cylinder block 20a ( 10a).

Here, the discharge chamber 12 and the suction chamber are respectively located inside and outside the partition 13 in correspondence with the refrigerant discharge hole and the refrigerant suction hole of the valve plate, which will be described below, in the front and rear housings 10 and 10a. (11) is formed.

Here, the discharge chamber 12 is formed in the first discharge chamber 12a formed inside the partition 13, and formed outside the partition 13 so as to be partitioned from the suction chamber 11 and the first discharge chamber 12a. ) And a second discharge chamber 12b communicating through the discharge hole 12c.

That is, when the refrigerant in the first discharge chamber 12a passes through the discharge hole 12c having the small diameter, the refrigerant is reduced and enlarged when moving to the second discharge chamber 12b. The pulsation pressure drops to reduce vibration and noise.

The front and rear cylinder blocks 20 and 20a are provided with a plurality of cylinder bores 21 therein, and the cylinder bores 21 corresponding to each other of the front and rear cylinder blocks 20 and 20a are provided. The pistons 50 are coupled to the linear reciprocating motion as well as the pistons 50 are coupled to the outer circumference of the swash plate 40 inclined to the drive shaft 30 via the shoe 45.

Accordingly, the pistons 50 reciprocate inside the cylinder bore 21 of the front and rear cylinder blocks 20 and 20a in conjunction with the swash plate 40 rotating together with the drive shaft 30.

A valve unit 60 is installed between the front and rear housings 10 and 10a and the front and rear cylinder blocks 20 and 20a.

Here, the valve unit 60 is a valve plate formed with a refrigerant suction hole communicating the suction chamber 11 and the cylinder bore 21 and a refrigerant discharge hole communicating the cylinder bore 21 and the discharge chamber 12, respectively. And suction valves and discharge lead valves provided on both sides of the valve plate and provided with valve plates to open and close the refrigerant suction holes and the refrigerant discharge holes, respectively.

The valve unit 60 is assembled between the front and rear housings 10 and 10a and the front and rear cylinder blocks 20 and 20a, respectively, in which fixings are formed on both sides of the valve unit 60. The pin 64 is assembled in a fixed position while being inserted into the fixing holes 15 formed on the opposite surfaces of the front and rear housings 10 and 10a and the front and rear cylinder blocks 20 and 20a. .

In addition, a suction side gasket 65 is installed to seal between the valve unit 60 and the front and rear cylinder blocks 20 and 20a, and the valve unit 60 and the front and rear housings 10 ( A discharge side gasket 66 is provided to seal between 10a), and the discharge side gasket 66 is formed with a retainer 66a to prevent excessive deformation of each valve plate of the discharge lead valve.

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.

In addition, a support hole 25 is formed in the center of the front and rear cylinder blocks 20 and 20a to support the drive shaft 30, and a needle roller bearing 26 is formed in the support hole 25. It interposes and supports the said drive shaft 30 rotatably.

On the other hand, in the upper part of the outer peripheral surface of the rear housing (10a) the refrigerant conveyed from the evaporator during the suction stroke of the piston 50 is supplied into the compressor (1), and during the compression stroke of the piston 50 in the compressor (1) The muffler 70 is installed to discharge the compressed refrigerant toward the condenser.

Referring to the refrigerant circulation process of the compressor (1) configured as described above are as follows.

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. .

Thereafter, the suction lead valve is opened during the suction stroke of the piston 50. At this time, the refrigerant in 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. At this time, the discharge lead valve is opened, and the refrigerant passes through the refrigerant discharge hole of the valve plate. 10a flows to the first discharge chamber 12a and finally discharged to the discharge portion of the muffler 70 through the refrigerant discharge port 72 of the muffler 70 via the second discharge chamber 12b. It will be fluid.

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 and 20a, the second discharge chamber 12b of the rear housing 10a flows to the refrigerant discharge port 72 together with the refrigerant therein. Through the discharge portion of the muffler 70 is discharged.

However, when left in use for a long time after the air conditioner, a liquid compression phenomenon occurs due to the liquid refrigerant. In other words, the liquid refrigerant having a higher density than the refrigerant in the gaseous state generates a very large pressure during the compression stroke of the piston 50 at the lower side of the compressor 1.

Accordingly, in the compression stroke of the piston 50, the valve plate of the discharge lead valve opens the refrigerant discharge hole of the valve plate. At this time, the valve plate is excessively deformed due to the very high pressure caused by the liquid refrigerant, thereby supporting the valve plate. There was a problem of deforming and breaking the retainer 66a of the discharge-side gasket 66.

In particular, there is a problem in that the breakage of the retainer 66a located in the lower gravity region where the liquid refrigerant accumulates is large.

In addition, when the pieces broken off due to breakage of the retainer 66a are separated from the parts, these pieces flow into the compressor 1, causing even more problems.

An object of the present invention for solving the above-mentioned problems is to form a support rib to support the retainer of the discharge side gasket in the lower region of the discharge chamber of the front and rear housing where the liquid refrigerant is collected when used after long-term storage of the air conditioner. The present invention provides a compressor that prevents damage to components and improves durability when a liquid compression occurs.

The present invention for achieving the above object is a front and rear housing in which the suction chamber and the discharge chamber is formed, the cylinder block is installed between the front and rear housings, and the drive shaft is installed in the cylinder bore of the cylinder block And a plurality of pistons reciprocating in conjunction with the rotational motion of the swash plate rotating together with the front and rear housings and the cylinder block, and are disposed on both sides of the valve plate to open and close the refrigerant suction hole and the refrigerant discharge hole. A compressor comprising a valve unit having a reed valve and a discharge lead valve, and a retainer provided on one side of the valve unit to support the discharge lead valve, wherein the discharge chambers of the front and rear housings are configured to be compressed by liquid refrigerant. It characterized in that the support means for supporting the retainer is formed to prevent breakage of the component when the phenomenon occurs.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Repeated description of the same construction and operation as in the prior art will be omitted.

3 is a cross-sectional view showing a compressor according to the present invention, FIG. 4 is a cross-sectional view taken along line B-B in FIG. 3, and FIG. 5 is an exploded perspective view showing a valve unit and a gasket in the compressor according to the present invention.

As shown, the compressor 100 according to the present invention, the discharge chamber 112 and the suction chamber 111 is partitioned / formed and coupled to each other inside and outside with the partition 113 therebetween. The front and rear cylinder blocks 120 and 120a installed between the rear housings 110 and 110a, the front and rear housings 110 and 110a, and the front and rear cylinder blocks 120 ( 120a) is rotatably supported by the drive shaft 130, the swash plate 140 and the outer circumference of the swash plate 140 is rotated together with the drive shaft 130 via the shoe 145, the front and rear A plurality of pistons 150 reciprocating inside the cylinder bore 121 formed on both sides of the swash plate chamber 124 of the cylinder block 120, 120a.

Here, the discharge chambers 112 of the front and rear housings 110 and 110a are formed in the first discharge chamber 112a formed inside the partition wall 113 and the outside of the partition wall 113 to form a suction chamber ( And a second discharge chamber 112b communicating with the first discharge chamber 112a and the discharge hole 112c.

That is, when the refrigerant in the first discharge chamber 112a passes through the discharge hole 112c having the small diameter, the refrigerant is reduced and enlarged when moving to the second discharge chamber 112b. The pulsation pressure drops to reduce vibration and noise.

On the other hand, a plurality of bolt fastening holes 116 are formed in the circumferential direction of the suction chamber 111, and through the bolt fastening holes 116 inside the front and rear housings 110, 110a In the assembled state of the components are fastened / fixed with the bolt (180).

Then, the front and rear cylinder block 120 (so that the refrigerant supplied to the swash plate chamber 124 provided between the front and rear cylinder blocks 120, 120a) can flow to the respective suction chambers 111 ( A plurality of suction passages 122 are formed in 120a, and the discharge passages 112 of the front and rear housings 110 and 110a pass through the front and rear cylinder blocks 120 and 120a. 123 communicate with each other.

In addition, a support hole 125 is formed at the center of the front and rear cylinder blocks 120 and 120a to support the drive shaft 130, and a needle roller bearing 126 is formed in the support hole 125. Is interposed to support the drive shaft 130 rotatably.

In addition, a valve unit 160 is assembled between the front and rear housings 110 and 110a and the front and rear cylinder blocks 120 and 120a. The valve unit 160 includes the suction chamber 111. And a valve plate 161 having a refrigerant suction hole 161a communicating with the cylinder bore 121 and a refrigerant discharge hole 161b communicating with the cylinder bore 121 and the discharge chamber 112, and the valve plate ( A suction lead valve 163 installed between the 161 and the front and rear cylinder blocks 120 and 120a and provided with a valve plate 163a to open and close the refrigerant suction hole 161a, and the valve plate. The discharge lead valve 162 is installed between the 161 and the front and rear housings 110 and 110a and provided with a valve plate 162a to open and close the refrigerant discharge hole 161b.

The valve unit 160 has fixing holes formed on opposite surfaces of the front and rear housings 110 and 110a and the front and rear cylinder blocks 120 and 120a provided at both sides of the valve unit 160. It is coupled / fixed while being inserted at 115.

In addition, a suction side gasket 165 is installed at one side of the suction lead valve 163 to seal between the valve unit 160 and the front and rear cylinder blocks 120 and 120a, and the valve unit 160 is provided. A discharge side gasket 166 is installed at one side of the discharge lead valve 162 to seal between the front and rear housings 110 and 110 a, and the suction side gasket 165 of the gaskets 165 and 166. ) Can be omitted.

In addition, a retainer 166a is installed at one side of the valve unit 160 to support the discharge lead valve 162. That is, the retainer 166a is each valve plate 162a of the discharge lead valve 162. It may be installed as a separate component on one side of the valve unit 160 to prevent excessive deformation of the), but may be integrally formed in the discharge side gasket 166 as in the present invention.

Therefore, the valve plate 162a of the discharge lead valve 162 opens the refrigerant discharge hole 161b and elastically deforms in the discharge chamber 112 direction during the compression stroke of the piston 150. In this case, the valve plate 162a In case of excessive deformation of), the deformation is prevented while being caught by the retainer 166a.

On the other hand, the upper portion of the outer peripheral surface of the rear housing (110a) during the suction stroke of the piston 150 supplies the refrigerant transferred from the evaporator through the refrigerant suction opening 171 into the compressor 100, and during the compression stroke of the piston 150 The muffler 170 is installed to discharge the refrigerant compressed in the compressor 100 toward the condenser through the refrigerant discharge port 172.

The compressor 100 is driven by selectively receiving the power of the engine by the intermittent action of the electronic clutch (not shown).

In the compressor 100, the discharge chamber 112 of the front and rear housings 110 and 110a may cause damage to components (retainers) due to the liquid compression caused by the liquid refrigerant when the air conditioner is left for a long time. Support means 117 for supporting the retainer (166a) is formed to be prevented.

The support means 117 is formed by protruding the support rib 117a to support the retainer 166a at a position corresponding to the retainer 166a in the discharge chamber 112.

In this case, the support rib 117a is generally formed in the lower gravity region of the discharge chamber 112 because the liquid refrigerant is accumulated on the lower side in the gravity direction of the compressor 100.

In the drawing, two support ribs 117a are formed in the lower region with respect to the center of the discharge chamber 112 to support the retainer 166a. However, the number and formation positions of the support ribs 117a are determined by the design purpose. Various modifications are possible accordingly.

As described above, the compressor 100 according to the present invention may support the retainer 166a of the discharge side gasket 166 in the lower region of the discharge chamber 112 of the front and rear housings 110 and 110a. The support rib 117a is formed so that the valve plate 162a of the discharge lead valve 162 strikes the retainer 166a of the discharge side gasket 166 by a large pressure when the liquid compression occurs due to the liquid refrigerant. In this case, since the support rib 117a formed in the discharge chamber 112 supports the retainer 166a, deformation and damage of the retainer 166a can be prevented.

As described above, in the present invention, a support rib 117a is formed in the discharge chamber 112 of the front and rear housings 110 and 110a to support the retainer 166a of the discharge side gasket 166. For the sake of convenience, only the case of applying the fixed capacity swash plate compressor 100 has been described. However, the present invention is not limited thereto. You can get the effect.

According to the present invention, the support ribs are formed in the lower region of the discharge chamber of the front and rear housings in which the liquid refrigerant is collected when the air conditioner is used after being left for a long time so as to support the retainer of the discharge side gasket. The breakage of the retainer) is prevented and durability is also improved.

Claims (4)

Front and rear housings 110 and 110a in which the suction chamber 111 and the discharge chamber 112 are formed, Cylinder blocks 120 and 120a installed between the front and rear housings 110 and 110a, A plurality of pistons 150 installed in the cylinder bores 121 of the cylinder blocks 120 and 120a and reciprocating in conjunction with the rotational movement of the swash plate 140 rotating together with the drive shaft 130; It is installed between the front and rear housings 110 and 110a and the cylinder blocks 120 and 120a and is disposed on both sides of the valve plate 161 to open and close the refrigerant suction hole 161a and the refrigerant discharge hole 161b. A valve unit 160 having a suction lead valve 163 and a discharge lead valve 162, In the compressor comprising a retainer (166a) which is installed to support the discharge lead valve 162 on one side of the valve unit 160, In the discharge chamber 112 of the front and rear housings 110 and 110a, support means 117 are formed to support the retainer 166a so as to prevent breakage of components when the liquid compression occurs due to liquid refrigerant. Compressor characterized. The method of claim 1, The support means (117) is characterized in that by forming a projection rib (117a) for supporting the retainer (166a) in a position corresponding to the corresponding retainer (166a). The method of claim 2, The support rib (117a) is characterized in that formed in the lower region of the discharge chamber (112). The method of claim 1, The retainer (166a) is a compressor, characterized in that formed integrally with the gasket (166) which is installed to seal between the valve unit (160) and the front, rear housing (110, 110a).

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