KR101038363B1 - Compressor - Google Patents

Abstract

The present invention relates to a compressor, and more particularly, in a structure in which refrigerant is sucked into a cylinder bore through a hollow drive shaft, when the refrigerant is sucked into the swash chamber through the refrigerant suction port, the frictional resistance due to the refrigerant suction is minimized. It is an object of the present invention to provide a compressor capable of improving the performance of a compressor by sufficiently securing the amount of refrigerant sucked into the drive shaft from the swash plate chamber.

To this end, the present invention is a swash plate rotating in the swash plate chamber in the compressor is inclined, the flow path is formed inside the refrigerant to be moved into the cylinder bore from the outside, the flow path is in communication with the swash chamber At least one inlet formed therein, and a drive shaft spaced apart from the inlet to form a pair of outlets in opposite directions; The drive shaft is rotatably installed in the shaft support hole and a plurality of cylinder bores are formed at both sides of the swash plate chamber, and the shaft sucked into the cylinder bore sequentially during the rotation of the drive shaft. A front and rear cylinder block having a suction passage communicating the support hole and each cylinder bore; 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; Front and rear housings coupled to both sides of the front and rear cylinder blocks and having discharge chambers formed therein; A valve unit interposed between the front and rear cylinder blocks and the front and rear housings, respectively; A compressor comprising: a refrigerant suction induction passage communicating with a refrigerant suction port formed at an upper portion of one of the front and rear cylinder blocks, the opening being directed toward the inlet of the flow path. .

Compressor, cylinder block, suction port, manifold, friction resistance, swash plate chamber, drive shaft, flow path

Description

Compressor

1 is a cross-sectional view showing a general compressor.

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

3 is an exploded perspective view showing a compressor according to the present invention.

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

5 is a sectional view showing another example of a compressor according to the present invention;

Figure 6 is a perspective view showing a state in which the drive shaft and the swash plate in the compressor according to the present invention.

<Description of Signs of Major Parts of Drawings>

100: compressor 110: front housing

111,121: discharge chamber

113,123: Bolted hole 114: Through hole

115a, 125a: space portion 116, 126: communication means

116a, 126a: hole 118: communication path

120: rear housing 130: front cylinder block

131, 141: cylinder bore 132, 142: suction passage

133,143: shaft support hole 134,144: discharge passage

135,145: Muffler 136: Judge Room

140: rear cylinder block 146: refrigerant suction port

146a: refrigerant suction muffler 146b: refrigerant suction induction passage

147a: refrigerant discharge port 150: drive shaft

151: Euro 152: entrance

153: exit 160: swash plate

161: hub 165: shoe

170: piston 180: thrust bearing

190: valve unit 191: valve plate

191a: refrigerant discharge hole 191b: communication path

192: discharge lead valve 192a: valve plate

193: fixing pin 200: bolt

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The present invention relates to a compressor, and more particularly, in a structure in which refrigerant is sucked into a cylinder bore through a hollow drive shaft, when the refrigerant is sucked into the swash chamber through the refrigerant suction port, the frictional resistance due to the refrigerant suction is minimized. It relates to a compressor that can improve the performance of the compressor by ensuring a sufficient suction amount of the refrigerant from the swash plate chamber into the drive shaft.

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 and 2 is a view showing a conventional fixed-capacity swash plate type 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).

Inside the front and rear housings 10 and 10a, the discharge chamber 12 and the suction are respectively provided inside and outside of the partition wall 13 in correspondence with the refrigerant discharge hole and the refrigerant suction hole of the valve plate 61 to be described below. The yarn 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.

On the other hand, a plurality of bolted fastening holes 16 are formed in the circumferential direction of the suction chamber 11. Through the bolt fastening hole 16, the front and rear housings 10 and 10a are fastened / fixed to the mutual bolts 80 in a state where a plurality of components are assembled therein.

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.

The 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 composed of a valve plate 61 having a refrigerant suction hole and a refrigerant discharge hole, and a suction lead valve 63 and a discharge lead valve 62 installed at both sides thereof.

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 plate 61. The pin 65 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. .

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 shaft support hole 25 is formed at 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 shaft support hole 25. It interposes and supports the said drive shaft 30 rotatably.

On the other hand, the upper portion of the outer side of the rear housing (10a) is supplied with the refrigerant transferred from the evaporator during the intake stroke of the piston 50 into the compressor (1), during the compression stroke of the piston 50 inside the compressor (1) The muffler 70 is formed to discharge the compressed refrigerant in 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, when the piston 50 is in the suction stroke, the suction lead valve 63 is opened by moving the piston 50 from the top dead center to the bottom dead center, wherein the refrigerant in the suction chamber 11 is a valve plate. It is sucked into the cylinder bore 21 through the refrigerant suction hole of the.

In the compression stroke of the piston 50, the refrigerant inside the cylinder bore 21 is compressed by the piston 50 moving from the bottom dead center to the top dead center. At this time, the discharge lead valve 62 is opened. The refrigerant flows to the first discharge chamber 12a of the front and rear housings 10 and 10a through the refrigerant discharge hole of the valve plate.

Subsequently, 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 to the condenser. 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, the above-described conventional compressor 1 has a loss due to the suction resistance caused by the complicated refrigerant passage inside, a loss due to the elastic resistance of the suction lead valve 63 when the valve unit 60 is opened and closed. There was a problem that the suction volume efficiency of the refrigerant is reduced.

On the other hand, a technique for reducing the loss caused by the elastic resistance of the suction lead valve 63 is disclosed in Korean Patent Publication No. 2003-47729 (name: lubrication structure in a fixed capacity piston compressor). That is, the above technology applies a suction shaft integrated suction rotary valve without a suction lead valve, and allows the refrigerant to directly enter the cylinder bore from the rear of the driving shaft through the inside of the driving shaft in order to reduce the loss caused by the suction resistance. will be.

In the case of the compressors, oil is mixed in the refrigerant for lubrication of the driving unit (swash plate, shoe, piston, etc.) and the friction unit inside the compressor to circulate the air conditioning system.

However, in Korean Patent Publication No. 2003-47729, since refrigerant is sucked from the rear of the drive shaft, a large amount of refrigerant flows into the rear cylinder bore and a small amount of refrigerant flows into the front cylinder bore, so that the compressor achieves optimum compression performance. There was a problem that could not be exercised.

In order to solve this problem, in the domestic patent application No. 2005-74185 previously filed by the applicant of the present invention, the refrigerant sucked into the compressor inside the drive shaft in which the swash plate rotating in the swash plate chamber in the compressor is obliquely coupled to the cylinder block. Disclosed is a compressor having a structure in which a flow path is formed so as to move uniformly with a cylinder bore formed therein, and an inlet and an outlet are spaced apart from both sides of the flow path.

Here, the inlet of the flow passage is formed through one side of the hub and the drive shaft of the swash plate, or formed in opposite directions on both sides of the drive shaft. In the latter case, one inlet is formed at a position spaced apart from each other so as not to face the other inlet.

In addition, the outlet of the flow path is formed so as to communicate with the suction passage of each cylinder bore, the cylinder bore provided on both sides of the swash plate chamber during rotation of the drive shaft is formed on both sides of the drive shaft in opposite directions to each other at the same time so as to suck the refrigerant It is.

However, the Korean Patent Application No. 2005-74185 discloses that the suction port of the suction manifold formed on the upper side of the rear cylinder block is located vertically at a long distance from the inlet of the drive shaft flow path. When suctioned into the room, the frictional resistance increases according to the flow, and the refrigerant is not sucked smoothly through the inlet of the drive shaft flow path. Accordingly, there is a concern that the performance of the compressor may be degraded by the durability of the compressor due to the lack of refrigerant. .

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and more particularly, when the refrigerant is sucked into the swash chamber through the refrigerant suction port in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft, An object of the present invention is to provide a compressor capable of improving the performance of a compressor by minimizing frictional resistance due to refrigerant suction to sufficiently secure a suction amount of the refrigerant from the swash plate chamber into the drive shaft.

The present invention for achieving the above object is a swash plate rotating in the swash plate chamber inside the compressor is inclined, the flow path is formed inside the refrigerant to be moved into the cylinder bore from the outside, the swash plate At least one inlet formed in communication with the seal, and a drive shaft spaced apart from the inlet to form a pair of outlets in opposite directions;

The drive shaft is rotatably installed in the shaft support hole and a plurality of cylinder bores are formed at both sides of the swash plate chamber, and the shaft sucked into the cylinder bore sequentially during the rotation of the drive shaft. A front and rear cylinder block having a suction passage communicating the support hole and each cylinder bore;

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;

Front and rear housings coupled to both sides of the front and rear cylinder blocks and having discharge chambers formed therein;

A valve unit interposed between the front and rear cylinder blocks and the front and rear housings, respectively;

In the compressor configured to include,

Refrigerant suction guide passage communicating with the refrigerant suction port formed on the upper one of the cylinder block of the front and rear cylinder block is characterized in that the opening toward the inlet of the flow path.

In the present invention, a refrigerant suction muffler is formed between the refrigerant suction port and the refrigerant suction induction passage.

In addition, in the present invention, the refrigerant suction guide passage is characterized in that the inclined shape in at least one of the axial direction and the circumferential direction of the cylinder block.

In the present invention, the refrigerant suction induction passage is formed in a position connected in a straight line with the inlet of the flow path.

In addition, in the present invention, the inlet of the flow path is formed in the opposite direction to each other through the both sides of the hub and the drive shaft of the swash plate to communicate with the swash plate chamber, the outlet is to communicate with the suction passage of the cylinder block Characterized in that formed.

Further, in the present invention, the valve unit is a valve plate formed with a plurality of refrigerant discharge holes to communicate with each of the cylinder bore and the discharge chamber of the front and rear housings, and is provided on one side of the valve plate to open and close the discharge hole It characterized in that the discharge lead valve made of.

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.

Figure 3 is an exploded perspective view showing a compressor according to the present invention, Figure 4 is a cross-sectional view showing a compressor according to the invention, Figure 5 is a cross-sectional view showing another example of a compressor according to the invention, Figure 6 according to the present invention It is a perspective view which shows the state which disassembled the drive shaft and the swash plate in the compressor.

The present invention employs a structure of a compressor capable of allowing the refrigerant supplied to the swash plate chamber to be directly sucked into the cylinder bore through the hollow drive shaft.

According to the compressor having such a structure, by forming a flow path inside the drive shaft and allowing the refrigerant supplied to the swash chamber to be directly sucked into the cylinder bore through the flow path as the drive shaft rotates, thereby providing uniform refrigerant to each cylinder bore on both sides of the swash chamber. As well as the distribution is made, there is an advantage that the flow of the refrigerant to the driving unit, such as the swash plate and the drive shaft in the swash plate chamber can be improved to improve the lubrication performance by the oil.

In the present invention employing the structure of the compressor, when the refrigerant is sucked into the swash plate chamber through the refrigerant suction port, by minimizing the frictional resistance due to the refrigerant suction to ensure a sufficient amount of refrigerant suction from the swash plate chamber into the drive shaft To improve the durability and performance of the.

That is, the compressor according to the present invention, as shown in the drawing, the drive shaft 150 and the drive shaft 150 is coupled to the swash plate 160 to rotate in the swash plate chamber 136 in the compressor 100 inclined; The front and rear cylinder blocks 130 and 140 rotatably installed in the shaft support holes 133 and 143, and are mounted on the outer circumference of the swash plate 160 via a shoe 165 and rotate the swash plate 160. A plurality of pistons 170 reciprocating inside the cylinder bores 131 and 141 formed on both sides of the swash plate chamber 136 of the front and rear cylinder blocks 130 and 140 in conjunction with the front and rear cylinder blocks; The front and rear housings 110 and 120 coupled to both sides of the blocks 130 and 140 and the discharge chambers 111 and 121 are formed therein, and the front and rear cylinder blocks 130 and 140. It is configured to include a valve unit 190 interposed between the front and rear housings 110 and 120, respectively.

The front and rear housings 110 and 120 are formed with a plurality of bolt fastening holes 113 and 123 at edges of the inside, and the front and rear housings through the bolt fastening holes 113 and 123. 110 and 120 are fastened / fixed to the mutual bolts 200 in the state in which the above components are assembled. Of course, the front and rear cylinder blocks 130, 140 and the valve unit 190 is formed with bolt fastening holes 138, 148, 194 so that the bolt 200 can pass through.

Both sides of the drive shaft 150 are rotatably installed in the shaft support holes 133 and 143 of the front and rear cylinder blocks 130 and 140, and the front end portion is a central through hole of the front housing 110. It extends to penetrate 114 and engages with the electronic clutch (not shown).

On the other hand, since the swash plate 160 is moved forward and backward while the swash plate 160 is rotated in an inclined state while the compressor 100 is driven, the swash plate 160 flows from side to side by an axial load so that the swash plate 160 is deformed. Or the driving shaft 150 may be deformed, and in order to prevent this, generally, a thrust bearing 180 is interposed between both ends of the swash plate 160 and the front and rear cylinder blocks 130 and 140. have.

The swash plate 160 rotating in the swash plate chamber 136 is inclinedly coupled to the driving shaft 150, and the suction refrigerant sucked into the swash plate chamber 136 through the refrigerant suction port 146 from the outside is inclined. A flow path 151 communicating with the swash plate chamber 136 and the cylinder bores 131 and 141 is formed to move through the swash plate 160 to the cylinder bores 131 and 141.

In the flow path 151, an inlet 152 serving as a refrigerant suction passage for sucking the refrigerant and an outlet 153 for discharging the refrigerant are formed at positions spaced apart from each other. The inlet 152 is formed to communicate with the swash plate chamber 136, the outlet 153 is formed to communicate with each suction passage 132, 142 of the front and rear cylinder blocks 130, 140. do.

Here, the inlet 152 of the flow path 151 is formed by vertically penetrating one side of the hub 161 and the drive shaft 150 of the swash plate 160. Only one inlet 152 of the flow path 151 may be formed on one side of the driving shaft 150, or two may be formed on both sides thereof in opposite directions.

The outlet 153 of the flow path 151 is formed in opposite directions on both sides of the drive shaft 151 while being spaced apart from the inlet 152 of the flow path 151 so that the swash plate chamber when the drive shaft 150 rotates ( Refrigerant may be sucked into the cylinder bores 131 and 141 provided at both sides of the 136 at the same time.

That is, since the swash plate 160 is formed to be inclined, the piston 170 disposed in opposite directions among the plurality of pistons 170 coupled to the outer circumference of the swash plate 160 performs the same suction or compression stroke. Both outlets 153 of the flow path 151 must be formed in opposite directions so that the refrigerant can be sucked into the cylinder bores 131 and 141 provided on both sides of the swash plate chamber 136 at the same time.

Of course, the direction of each outlet 153 of the flow path 151 formed in the drive shaft 150 may vary depending on the design purpose such as the number of the piston 170.

In addition, the front and rear cylinder blocks 130 and 140 may have a plurality of cylinder bores 131 and 141 respectively formed at both sides of the swash plate chamber 136, and may support the driving shaft 150 at the center thereof. Axial support hole 133, 143 is formed to be.

In addition, the front and rear cylinder blocks (130, 140), the refrigerant sucked into the flow path 151 of the drive shaft 150 in the swash plate chamber 136, each cylinder bore (sequential) during rotation of the drive shaft 150 ( Suction passages 132 and 142 communicating with the shaft support holes 133 and 143 and the respective cylinder bores 131 and 141 are formed to be sucked into the 131 and 141.

The outer surface of one of the front and rear cylinder blocks 130, 140, the refrigerant suction port 146 in communication with the swash plate chamber 136 to supply an external refrigerant to the swash plate chamber 136, and Refrigerant discharge ports 147 communicating with the discharge chambers 111 and 121 are separately formed to discharge the refrigerant in the discharge chambers 111 and 121 of the front and rear housings 110 and 120 to the outside. .

Accordingly, the discharge passage 134 connecting the discharge chambers 111 and 121 and the discharge port 147a of the front and rear housings 110 and 120 to the front and rear cylinder blocks 130 and 140. At this time, the outer surface of the cylinder block 130, 140 is formed with a muffler 135, 145 to expand the discharge passage 134 to reduce the pulsation pressure of the discharge refrigerant to reduce the noise do.

Here, the end of the refrigerant suction port 146 to induce the refrigerant sucked from the outside through the refrigerant suction port 146 to the inlet 152 side of the flow path of the drive shaft 150 to maximize the suction effect of the refrigerant. The refrigerant suction induction passage 146b formed in communication with the refrigerant suction port 146 is preferably formed at a position facing the inlet 152 of the flow path of the drive shaft 150.

For example, the refrigerant suction induction passage 146b communicating with the refrigerant suction port 146 is formed at a position connected in series with the inlet 152 of the flow path of the drive shaft 150 as shown in FIG. 4. A refrigerant suction muffler 146a is formed between the refrigerant suction port 146 and the refrigerant suction induction passage 146b to reduce noise by reducing the pulsation pressure of the refrigerant sucked in.

As described above, according to the structure illustrated in FIG. 4, the refrigerant may be forced into the swash plate chamber 136 through the refrigerant suction port 146 through the refrigerant suction muffler 146a and the refrigerant suction guide passage 146b. Since it can be induced, it can be directly sucked into the inlet 152 of the flow path of the drive shaft 150 without causing a large frictional resistance generated when the refrigerant is sucked into the swash plate chamber 136 as before. As a result, a sufficient amount of refrigerant suction in the flow path 151 of the drive shaft 150 can be ensured, and the durability and performance of the compressor can be significantly improved. In general, the refrigerant sucked from the outside through the refrigerant suction muffler 146a of the refrigerant suction port 146 passes through the swash plate chamber 136. At this time, since the driving shaft 150 rotates at a high speed of about 5,000 rpm. The refrigerant sucked into the swash plate chamber 136 does not directly enter the inlet 152 of the flow path of the drive shaft 150, but generates a suction resistance while rubbing against the driving component in the swash plate chamber 136. Therefore, in order to minimize the suction resistance due to such friction and to increase the refrigerant suction effect, the present invention has a direct connection such that the refrigerant suction induction passage 146b and the inlet 152 of the drive shaft 150 flow path are in a straight line. It is composed of a connection structure.

On the other hand, the compressor shown in FIG. 5 is the same as the structure of FIG. 4 except that a refrigerant suction muffler is not formed between the refrigerant suction port 146 and the refrigerant suction induction passage 146b. In this structure, the refrigerant suction induction passage 146b is predetermined in at least one of an axial direction of the drive shaft 150 and a circumferential direction of the cylinder block so as to be formed toward the inlet 152 of the drive shaft 150. It may be made in a shape inclined at an angle. In this case, even if the refrigerant suction induction passage 146b is located far from the inlet 152 of the drive shaft 150 flow path as shown in FIG. 4, the refrigerant suction induction passage 146b passes through the refrigerant suction port 146. Refrigerant sucked through the) through the swash plate chamber 136 in the inclined direction is forcibly guided to the inlet 152 of the flow path of the drive shaft 150 can exhibit the effects as described above.

On the other hand, the valve unit 190 is a plurality of refrigerant discharge holes (191a) to communicate the cylinder bore (131, 141) and the discharge chamber (111, 121) of the front and rear housing (110, 120) Is formed on the valve plate 191 and the discharge lead valve 192 which is installed at one side of the valve plate 191 to open and close the refrigerant discharge hole 191a.

That is, the discharge lead valve 192 is installed in the discharge chambers 111 and 121 of the front and rear housings 110 and 120 on the basis of the valve plate 191 to compress the stroke of the piston 170. The valve plate 192a is elastically deformed to open the refrigerant discharge hole 191a and to close the refrigerant discharge hole 191a when the suction stroke is performed.

In addition, the valve plate 191 has refrigerant in the discharge chambers 111 and 121 of the front and rear housings 110 and 120 discharge passages 134 of the front and rear cylinder blocks 130 and 140. A communication path 191b is formed to communicate the discharge chambers 111 and 121 with the discharge passages 134 and 144 so as to be discharged to the discharge port 147a via the 144.

Meanwhile, the valve unit 190 has fixing pins 193 provided on both sides of the valve plate 191 facing the front and rear housings 110 and 120 and the front and rear cylinder blocks 130 and 140. It is coupled and fixed while being inserted into a fixing hole (not shown) formed in the surface.

As described above, in the compressor 100 according to the present invention, when the driving shaft 150 selectively receives power from an electronic clutch (not shown), the swash plate 160 rotates, and the swash plate ( The plurality of pistons 170 linked to the rotational movement of 160 repeats the action of sucking and compressing the refrigerant while reciprocating inside the cylinder bores 131 and 141 of the front and rear cylinder blocks 130 and 140. It will be done.

That is, during the suction stroke of the piston 170, an external refrigerant is supplied into the swash plate chamber 136 through the refrigerant suction port 146 and then through the inlet 152 of the flow path 151 of the drive shaft 150. It is directly sucked into the cylinder bores 131 and 141.

In the compression stroke of the piston 170, after the refrigerant sucked into the cylinder bores 131 and 141 is compressed by the piston 170, the discharge chamber 111 of the front and rear housings 110 and 120 is compressed. It is discharged to the 121 is discharged to the discharge port 147a through the discharge passage 134, 144 and the muffler 135, 145 of the front and rear cylinder blocks 130, 140.

As described above, the present invention forms a flow path 151 inside the hollow drive shaft 150 to supply the refrigerant sucked into the swash plate chamber 136 to the cylinder bores 131 and 141 through the flow path 151. By improving the structure of the refrigerant suction port of the fixed-capacity swash plate type compressor of the drive shaft-integrated suction rotary valve type to move to the The same method and configuration can be applied to various types of compressors, such as swash plate compressors and electric compressors, and the same effects can be obtained.

According to the present invention, in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft when the refrigerant is sucked into the swash chamber through the refrigerant suction port through the refrigerant suction port, the frictional resistance due to the refrigerant suction is minimized By inducing forced suction of the refrigerant from the swash plate chamber into the drive shaft to sufficiently secure the refrigerant suction amount, the durability and performance of the compressor can be greatly improved.

Claims (6)

The swash plate 160 rotating in the swash plate chamber 136 inside the compressor 100 is inclinedly coupled therein, and the flow path allows the refrigerant sucked into the compressor 100 from the outside to move to the cylinder bores 131 and 141. 151 is formed, and at least one inlet 152 is formed in the flow path 151 to communicate with the swash plate chamber 136, and a pair of outlets 153 are spaced apart from the inlet 152. Drive shafts 150 formed in opposite directions to each other; The drive shaft 150 is rotatably installed in the shaft support holes 133 and 143, and a plurality of cylinder bores 131 and 141 are formed at both sides of the swash plate chamber 136 and the flow path of the drive shaft 150 is provided. The shaft support holes 133 and 143 and each cylinder bore 131 and 141 may be sucked into the cylinder bore 131 and 141 sequentially during the rotation of the drive shaft 150. Front and rear cylinder blocks 130 and 140 formed with suction passages 132 and 142 communicating therewith; 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 (160); Front and rear housings 110 and 120 coupled to both sides of the front and rear cylinder blocks 130 and 140 and having discharge chambers 111 and 121 formed therein, respectively; A valve unit 190 interposed between the front and rear cylinder blocks 130 and 140 and the front and rear housings 110 and 120, respectively; In the compressor configured to include, The refrigerant suction induction passage 146b communicating with the refrigerant suction port 146 formed on the upper portion of any one of the front and rear cylinder blocks 130 and 140 blocks the inlet 152 of the flow path 151. And is opened toward the compressor. The method of claim 1, And a refrigerant suction muffler (146a) is formed between the refrigerant suction port (146) and the refrigerant suction induction passage (146b). The method of claim 1, The refrigerant suction guide passage (146b) is characterized in that the inclined in at least one direction of the axial direction of the drive shaft 150 and the circumferential direction of the cylinder block. The method of claim 1, And the refrigerant suction guide passage (146b) is formed at a position connected in a straight line with the inlet (152) of the flow path (151). The method of claim 1, The inlet 152 of the flow path 151 penetrates both sides of the hub 161 of the swash plate 160 and the drive shaft 150 so as to communicate with the swash plate chamber 136, a pair is formed in the opposite direction to each other, The outlet (153) is characterized in that the compressor is formed to communicate with the suction passage (132) (142) of the front and rear cylinder block (130) (140). The method of claim 1, The valve unit 190 has a plurality of refrigerant discharge holes 191a to communicate with each of the cylinder bores 131 and 141 and the discharge chambers 111 and 121 of the front and rear housings 110 and 120. Compressor, characterized in that formed in the valve plate 191 and the discharge lead valve 192 is installed on one side of the valve plate 191 to open and close the discharge hole (191a).

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