KR101094625B1 - Compressor - Google Patents

Abstract

The present invention relates to a compressor, in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft to secure a refrigerant suction passage to minimize the refrigerant suction resistance and to enhance the lubrication action on the thrust bearing for supporting the swash plate This aims to improve the performance of the compressor.

To this end, the present invention is a swash plate that is rotated in the swash plate chamber inside the compressor is inclined, the flow path is formed so that the refrigerant sucked into the compressor from the outside in the cylinder bore, the flow path is each communicated with the swash chamber A drive shaft having at least one inlet formed therein and 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 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; A thrust bearing installed between the swash plate and the cylinder block to support both sides of the swash plate and coupled to the drive shaft; Front and rear housings coupled to both sides of the cylinder block and having discharge chambers formed therein; A valve unit interposed between the cylinder block and the front and rear housings, respectively; In the compressor formed in the swash plate and comprises at least one auxiliary inlet, one end is in contact with the thrust bearing and the other end is in communication with the inlet of the flow path, at the position facing the auxiliary inlet, the thrust at the same time as the refrigerant suction At least one lubrication passage for lubricating the bearing is characterized in that it is formed to communicate with the inlet of the passage.

Compressor, drive shaft, flow path, suction resistance, refrigerant resistance, thrust bearing, lubrication, auxiliary inlet

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 perspective view showing a state in which the drive shaft and the swash plate are disassembled in the compressor according to the present invention.

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

7 is a sectional view showing the main parts of an example of a structure of a drive shaft and a thrust bearing in the compressor according to the present invention;

8 is a sectional view showing the principal parts of another example of the structure of the drive shaft and the thrust bearing in the compressor according to the present invention;

Description of the Related Art [0002]

100: compressor 110: front housing

111,121: discharge chamber 112,122: fixing hole

113,123: bolt fastener 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: suction port

147: discharge port 150: drive shaft

151: Euro 152: entrance

153: exit 154: auxiliary entrance

155,156 Lubrication channel 160: Swash plate

161: hub 165: shoe

170: piston 180: thrust bearing

181, 182: Race 183: Roller

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

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, a refrigerant suction passage is sufficiently secured to minimize a refrigerant suction resistance and to support a swash plate. It relates to a compressor that can improve the performance of the compressor by increasing the lubrication action.

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 formed inside and outside the partition 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 fixing pins are formed on both sides of the valve plate 61. 65 is assembled in a fixed position while being inserted into the fixing hole 15 formed on the opposite surface 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, the suction lead valve 63 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. .

In addition, during the compression stroke of the piston 50, the refrigerant inside the cylinder bore 21 is compressed. In this case, the discharge lead valve 62 is opened, and the refrigerant passes through the refrigerant discharge hole of the valve plate. 10) to the first discharge chamber 12a of 10a.

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. After flowing along the connecting passage 23 formed in the front and rear cylinder blocks 20 and 20a to the second discharge chamber 12b of the rear housing 10a, the refrigerant discharge port 72 together with the refrigerant therein. Through the discharge to the discharge portion of the muffler 70.

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. And,

In addition, in the domestic patent application No. 2005-74186 filed by the applicant of the present invention, the cylinder bore formed in the cylinder block the refrigerant sucked into the compressor inside the drive shaft that is inclinedly coupled to the swash plate rotating in the swash plate chamber inside the compressor. It has been disclosed a compressor having a structure in which a flow path is formed so as to move to a side, 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, according to Korean Patent Publication No. 2003-47729, the refrigerant suction passage could not be sufficiently secured due to enormous constraints in increasing the size by processing the refrigerant suction passage behind the drive shaft. In case of 74186, there is a limitation in increasing the inlet of the flow path, which causes a problem of increasing the refrigerant suction resistance.

In particular, the Korean Patent Publication No. 2003-47729 is directed to the thrust bearing for supporting the swash plate by lubricating oil in the refrigerant sucked to the rear of the drive shaft from the swash plate chamber in the radial direction of the drive shaft, In view of the present invention, there is disclosed a structure for forming a lubricating communication hole communicating with the inside of the drive shaft so as to overlap with the thrust bearing. It is difficult to supply the lubricating oil to the thrust bearing side through the lubricating communication hole having the same structure as that of Korean Patent Publication No. 2003-47729. Accordingly, in the case of the compressor of the medium pressure suction method such as Korean Patent Application No. 2005-74186, there has been a demand for an improvement to improve the durability by providing sufficient lubricating action to the thrust bearing to reduce the frictional force.

Therefore, the present invention has been made to solve the above-mentioned problems, and in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft, the refrigerant suction passage is sufficiently secured to minimize the refrigerant suction resistance and support the swash plate. It is an object of the present invention to provide a compressor that can improve the performance of the compressor by increasing the lubrication effect on the thrust bearing.

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 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;

A thrust bearing installed between the swash plate and the cylinder block to support both sides of the swash plate and coupled to the drive shaft;

Front and rear housings coupled to both sides of the cylinder block and having discharge chambers formed therein; A valve unit interposed between the cylinder block and the front and rear housings, respectively;

In the compressor is formed in the swash plate comprising at least one auxiliary inlet end is in contact with the thrust bearing and the other end is in communication with the inlet of the flow path,

At a position opposite to the auxiliary inlet, at least one lubrication passage for lubricating the thrust bearing at the same time as the refrigerant suction is formed so as to communicate with the inlet of the flow path,
The lubrication passage is formed closer to the drive shaft in the radial direction of the drive shaft than the auxiliary inlet,

The inlet of the flow path penetrates both sides of the hub and the drive shaft of the swash plate vertically, respectively, and a pair is formed in the opposite direction, the outlet is formed to communicate with the suction passage of the cylinder block, the auxiliary inlet is the inlet of the flow path It is characterized in that a pair is formed in the opposite direction to each other through the horizontal to each side of the hub of the swash plate to cross at right angles.

In addition, in the present invention, the lubrication passage is formed in a hole (hole), characterized in that a pair is formed in the opposite direction by penetrating horizontally to both sides of the swash plate hub facing the auxiliary inlet.

In addition, in the present invention, the lubrication passage is formed in a groove (groove), characterized in that a pair is formed in opposite directions on both sides of the outer peripheral surface of the drive shaft at a position corresponding to the lower surface of the thrust bearing.

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 present invention, Figure 5 is a perspective view showing the disassembled drive shaft and the swash plate in the compressor according to the present invention, Figure 6 FIG. 7 is a perspective view illustrating a state in which a drive shaft and a swash plate are assembled in the compressor according to the present invention, and FIG. 7 is a cross-sectional view illustrating main parts of the structure of the drive shaft and the thrust bearing in the compressor according to the present invention, and FIG. 8 is a compressor according to the present invention. Is a main cross-sectional view showing another example of the structure of the drive shaft and the thrust bearing.

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.

The present invention is to improve the performance of the compressor by minimizing the suction resistance of the refrigerant sucked into the drive shaft, while improving the lubricity of the thrust bearing for supporting the swash plate in employing the structure of the compressor.

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 one end thereof penetrates the center of the front housing 110. It extends and is engaged with the electromagnetic 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 thrust bearing 180 has a large diameter race 181 sliding with the swash plate 160 and a small diameter race 182 sliding with the cylinder blocks 130 and 140 as shown in FIGS. 7 and 8. The needle type roller 183 is provided between the large diameter race 181 and the small diameter race 182.

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

On the other hand, the swash plate 160 is formed with an auxiliary inlet 154, one end of which is in contact with the thrust bearing 180 and the other end of which communicates with the inlet 152 of the flow path 151.

The auxiliary inlet 154 penetrates horizontally through one side of the hub 161 of the swash plate 160 to cross at right angles with the inlet 152 of the flow path 151 as shown in detail in FIGS. 7 and 8. Is formed. Like the inlet 152 of the flow path 151, only one auxiliary inlet 154 may be formed on one side of the hub 161, or two may be formed on both sides thereof in opposite directions.

As such, the auxiliary inlet 154 together with the inlet 152 is formed in the swash plate 160 to communicate with each other, thereby allowing the refrigerant introduced into the swash plate chamber 136 to enter the inlet 152 and the auxiliary inlet 154. Since it can be sucked into the flow path 151 of the drive shaft 150 at the same time through, the refrigerant suction passage can be sufficiently secured without being greatly restricted in increasing its size when forming the refrigerant suction passage as before. The amount of refrigerant sucked per hour may be increased to minimize the refrigerant suction resistance of the driving shaft 150 into the flow path 151. In addition, since one end of the auxiliary inlet 154 is exposed to the thrust bearing 180 side, the refrigerant flowing into the swash plate chamber 136 passes along the thrust bearing 180 side along with the oil piggybacked on the refrigerant. When passing through the inlet 154 and the inlet 152 sequentially and sucked into the flow path 151 of the drive shaft 150, while lubricating the contact portion between the roller 183 and the race 181, 182 By reducing the frictional force therebetween can increase the durability of the thrust bearing 180 and at the same time extend its life. As a result, the performance of the compressor as a whole can be greatly improved.

In addition to the formation of the auxiliary inlet 154 having such a function, at least one lubrication passage 155 and 156 is formed at a position facing the auxiliary inlet 154 to improve lubricity for the thrust bearing. . This is to solve the problem that the lubrication action on the thrust bearing 180 on the opposite side of the auxiliary inlet 154 is difficult.

The lubrication passages 155 and 156 may be formed in a hole shape or a groove shape. For example, as shown in FIG. 7, the lubrication passage 155 may have a hub of the swash plate 160 facing the auxiliary inlet 154 so as to communicate with the inlet 152 of the flow path 151 at right angles. 161 is formed in a hole shape. Like the auxiliary inlet 154, the lubrication passage 155 may be formed only one on one side of the hub 161, or two may be formed on both sides thereof in opposite directions.

As shown in FIG. 8, the lubrication passage 156 has a drive shaft at a position corresponding to a lower surface of the thrust bearing 180 so as to communicate with the inlet 152 of the flow passage 151 at right angles. 150) It is formed in the shape of a groove on the outer circumferential surface. Of course, the lubrication passage 156 may also be formed on only one side of the outer peripheral surface of the drive shaft 150, or may be formed on both sides in two opposite directions.

When the lubricating passages 155 and 156 having such a structure are formed at positions opposite to the auxiliary inlet 154, when the suction action of the refrigerant is made through the inlet 151 and the auxiliary inlet 154 as described above. Since lubricating oil can be supplied to the thrust bearing 180 on the opposite side of the auxiliary inlet 154, the side of the thrust bearing 180 facing the auxiliary inlet 154 and the auxiliary inlet 154 during the refrigerant suction process. There is an advantage that can further improve the lubricity for the thrust bearing 180 on the side opposite.

On the other hand, the front and rear cylinder blocks 130, 140 are formed on the swash plate chamber 136 both sides of the plurality of cylinder bores 131, 141, respectively, and can support the drive shaft 150 in the center. 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.

In addition, the outer surface of one of the front and rear cylinder block 130, 140, the suction port 146 in communication with the swash plate chamber 136 to supply an external refrigerant to the swash plate chamber 136, and Discharge ports 147 communicating with the discharge chambers 111 and 121 are 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 147 of the front and rear housings 110 and 120 to the front and rear cylinder blocks 130 and 140. 144 is formed on the outer surface of the cylinder block 130, 140 muffler 135 to expand the discharge passage 134, 144 to reduce the pulsation pressure of the discharge refrigerant to reduce the noise 145 is formed.

In addition, the valve unit 190 has a plurality of refrigerant discharge holes 191a to communicate the cylinder bores 131 and 141 with the discharge chambers 111 and 121 of the front and rear housings 110 and 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 147 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 the fixing holes 112 and 122 formed on 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, in the suction stroke of the piston 170, an external refrigerant is supplied into the swash plate chamber 136 through the suction port 146, and then the inlet 152 and the auxiliary inlet of the flow path 151 of the drive shaft 150 are provided. It is sucked directly into the cylinder bores 131 and 141 through 154.

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 147 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. Minimize the refrigerant suction resistance by applying the structure to form the lubrication passages 155 and 156 together with the auxiliary inlet 154 to the configuration of the fixed capacity swash plate type compressor of the drive shaft integrated suction rotary valve type to move to The thrust bearing 180 is sufficiently lubricated, and can be applied to various kinds of compressors such as the fixed displacement swash plate compressor as well as the electric compressor in the same method and configuration, and the same effect 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, in addition to the refrigerant suction inlet formed on the outer peripheral surface of the drive shaft, one end is in communication with the inlet and the other end is in contact with the thrust bearing on the hub side of the swash plate. By forming an auxiliary inlet and forming a lubrication passage at a position opposite to the auxiliary inlet, the refrigerant suction passage is sufficiently secured to minimize the refrigerant suction resistance and to further increase the lubrication effect on the thrust bearing. The performance can be greatly improved.

Claims (4)

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. 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); A thrust bearing 180 installed between the swash plate 160 and the cylinder block 130, 140 so as to support both sides of the swash plate 160, and coupled to the drive shaft 150; Front and rear housings 110 and 120 coupled to both sides of the cylinder blocks 130 and 140 and having discharge chambers 111 and 121 formed therein, respectively; A valve unit 190 interposed between the cylinder blocks 130 and 140 and the front and rear housings 110 and 120, respectively; In the compressor is formed on the swash plate 160 and comprises at least one auxiliary inlet 154 one end is in contact with the thrust bearing 180 and the other end is in communication with the inlet 152 of the flow path 151, At a position opposite to the auxiliary inlet 154, at least one lubrication passage 155, 156 for lubricating the thrust bearing at the same time as the refrigerant intake is formed so as to communicate with the inlet 152 of the flow passage 151, , The lubrication passages 155 and 156 are formed closer to the drive shaft 150 in the radial direction of the drive shaft 150 than the auxiliary inlet 154, The inlet 152 of the flow path 151 vertically penetrates both sides of the hub 161 and the drive shaft 150 of the swash plate 160 to form a pair in the opposite direction to each other, the outlet 153 is the cylinder It is formed to communicate with the suction passage 132, 142 of the block 130, 140, the auxiliary inlet 154 of the swash plate 160 so as to cross at a right angle with the inlet 152 of the flow path (151) Compressor, characterized in that a pair is formed in the opposite direction from each other through the horizontal to each side of the hub (161). delete The method of claim 1, The lubrication passage 155 is formed in a hole shape, the compressor is characterized in that a pair is formed in the opposite direction by penetrating horizontally to both sides of the hub 161 of the swash plate 160 facing the auxiliary inlet 154, respectively. . The method of claim 1, The lubrication passage (156) has a groove shape, the compressor characterized in that a pair is formed in opposite directions on both sides of the outer peripheral surface of the drive shaft (150) at a position corresponding to the lower surface of the thrust bearing (180).

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