KR101065978B1 - Compressor - Google Patents

Abstract

The present invention relates to a compressor, in which a refrigerant is sucked into a cylinder bore through a hollow drive shaft to smoothly supply lubricating oil between an outer circumferential surface of a drive shaft requiring lubrication and an inner circumferential surface of a shaft support hole, thereby improving lubrication and sealing effects. It aims at being able to improve the performance of the compressor which can improve the performance of the compressor as a whole.

To this end, in the present invention, a swash plate rotating in the swash plate chamber inside the compressor is inclinedly coupled thereto, and a flow path is formed therein to allow the refrigerant sucked into the compressor from the outside to move into a cylinder bore, each of which has at least one inlet. In addition, the drive shaft is spaced apart from the inlet and the pair of outlets formed in opposite directions to each other; In order to induce the oil in the refrigerant sucked through the inlet of the flow path to be separated from the refrigerant gas, a plurality of hollow cylindrical portion, formed on the side of the cylindrical portion corresponding to the inlet and the inner peripheral surface of the cylindrical portion Oil separation guide member consisting of two uneven parts; 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; In the compressor configured to include a valve unit interposed between the cylinder block and the front, rear housings, At least one chamfer processing portion along the direction of rotation of the drive shaft on the edge of at least one outlet of the pair of outlets Characterized in that formed.

Compressor, drive shaft, flow path, oil separation, lubrication, sealing, oil shortage, irregularities, swash chamber

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

6 is an enlarged perspective view of main parts of a drive shaft of a compressor according to the present invention;

7 is a cross-sectional view taken along the line A-A of FIG.

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 152a, 152b: Entrance

153a, 153b: Exit 153a-1, 153a-2: Chamfer processing part

155: sealing part

160: Saphan 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

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, lubrication and sealing by smoothly supplying lubricating oil between an outer circumferential surface of the drive shaft and an inner circumferential surface of the shaft support hole where lubrication is required. It relates to a compressor that can improve the performance of the compressor as a whole by improving the 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 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 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. The refrigerant discharge port 72 flows to the second discharge chamber 12b of the rear housing 10a along the connection passage 23 formed in the front and rear cylinder blocks 20 and 20a. 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.

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, the related arts support the drive shaft and the drive shaft by passing the oil piggybacked in the refrigerant sucked into the drive shaft through the inner wall of the drive shaft and exiting directly to a heat exchanger (condenser, evaporator) that does not require lubricity through the cylinder bore. Not only sufficient lubricity and sealing property could not be secured between the shaft support holes, but it was also difficult to return oil into the swash chamber where lubricity was required. As a result, the compressor's internal lubrication is insufficient, which may cause the compressor to lose its compressive performance prematurely due to excessive heat generation and abrasion in the compressor.In addition, the resistance that oil adheres to the wall of the heat exchanger prevents heat exchange with the outside. There was a problem in reducing the heat exchange performance of the heat exchanger.

In particular, in the compressor according to Korean Patent Application No. 2005-74186, the oil stored on the outlet side cannot be smoothly supplied to the drive unit requiring lubrication, and the outlet shape is a shape that sweeps out the lubricating oil of the drive unit. Due to the smooth supply of lubricating oil was also not possible.

Accordingly, the present invention has been made to solve the above-described problems, and in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft, the lubricating oil is smoothly supplied between the drive shaft outer circumferential surface and the shaft support hole inner circumferential surface where lubrication is required. It is an object to provide a compressor that can improve the performance of the compressor as a whole by improving the lubrication and sealing action.

The present invention for achieving the above object is a drive shaft to which the swash plate rotating in the swash plate chamber inside the compressor is inclined, the flow path is formed therein so that the refrigerant sucked into the compressor from the outside can move to the cylinder bore, the flow path Each of the drive shaft is formed with at least one inlet, and a pair of outlets spaced apart from the inlet in the opposite direction;

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 configured to include,

At least one outlet of the pair of outlets is formed with at least one chamfer (Chamfer) processing portion in the rotational direction of the drive shaft, the chamfer processing portion is characterized in that formed on one side of the outer edge surface of the outlet .

delete

In the present invention, the chamfer processing portion is formed on the entire inner end surface surrounding the edge of the outlet.

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 sectional view showing a compressor according to the present invention, Figure 5 is an exploded perspective view showing a state in which the drive shaft and the swash plate of the compressor according to the present invention, 6 is an enlarged perspective view of main parts of a drive shaft of a compressor according to the present invention, and FIG. 7 is a cross-sectional view taken along line AA of FIG. 6.

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 such a compressor, the drive shaft outer circumferential surface and the shaft support hole inner circumferential surface through the chamfer processing portion formed in the outlet as described later in detail the oil piggybacked on the refrigerant sucked into the drive shaft through the swash plate chamber from the outside Lubrication and durability of the drive part by supplying in between improves the lubrication and sealing action, and also makes it easy to return the oil through the inlet into the swash chamber where lubrication is required. This is to significantly improve the performance of the compressor as a whole.

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.

In addition, 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 at one end thereof, the center of the front housing 110 is provided. It extends to penetrate and engage with the electronic clutch (not shown).

Meanwhile, 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 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.

Inlets 152a and 152b of the flow path 151 are formed through the hub 161 of the swash plate 160 and one side of the drive shaft 150 to communicate with the swash plate chamber 136, and the flow path 151. Outlets 153a and 153b are formed to communicate with each of the suction passages 132 and 142 of the front and rear cylinder blocks 130 and 140.

Here, one or two inlets 152a and 152b of the flow path 151 may be formed, and in the case of forming two inlets 152a and 152b of the flow path 151, FIG. As shown in the figure, they may be arranged in opposite directions to each other.

The outlets 153a and 153b of the flow path 151 are formed in opposite directions on both sides of the drive shaft 151 while being spaced apart from the inlets 152a and 152b of the flow path 151, so that During rotation, refrigerant may be sucked into the cylinder bores 131 and 141 provided at both sides of the swash plate chamber 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 153a and 153b 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 153a, 153b of the flow path 151 formed on the drive shaft 150 may vary depending on the design purpose such as the number of the piston 170.

6 and 7, at least one of the pair of outlets 153a and 153b (only '153a' is shown in the drawing, hereinafter, the outlet 153a will be described as an example). At least one chamfering portion 153a-1 and 153a-2 is preferably formed along the rotational direction of the driving shaft 150 (in the direction of the arrow in FIG. 6) at the edge forming the c).

The chamfering parts 153a-1 and 153a-2 may include the first chamfering part 153a-1 formed on one side of the edge outer end surface of the outlet 153a and the inner end surface surrounding the edge of the outlet 153a. It consists of a second chamfer processing portion (153a-2) formed in. Here, the outer end surface refers to the outer edge surface of the outlet 153a which is immediately adjacent to the outer circumferential surface of the drive shaft 150, and the inner end surface thereof is the inner edge surface of the outlet 153a which is immediately adjacent to the inner circumferential surface of the drive shaft 150. I speak.

As such, the first and second chamfering parts 153a-1 and 153a-2 are formed toward the outside and the inside of the outlet 153a, respectively, so that the lubrication oil rotates in the driving shaft 150. During driving, the inner wall surfaces of the outlets 153a and 153b are smoothly discharged along the chamfer processing portions 153a-1 and 153a-2, and flow in a state of surrounding the outer circumferential surface of the driving shaft 150. Thereby, the lubricity and sealing property to the sealing part 155 side between the outer peripheral surface of the drive shaft 150 and the inner peripheral surface of the shaft support holes 134 and 143 which support the driving shaft 150 can be improved significantly.

On the other hand, the front and rear cylinder blocks (130, 140) are formed in each of a plurality of cylinder bores (131, 141) on both sides of the internal swash plate chamber 136, so as to support the drive shaft 150 in the center Axial support holes 133 and 143 are formed.

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 and the suction port 146 in communication with the swash plate chamber 136 to supply external refrigerant to the swash plate chamber 136, 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.

The valve unit 190 has a surface in which the fixing pins 193 provided on both sides of the valve plate 191 face the front and rear housings 110 and 120 and the front and rear cylinder blocks 130 and 140. It is fixedly coupled while being inserted into the fixing holes (112, 122) formed in.

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 suction port 146 and then in the inlets 152a and 152b of the flow path 151 of the drive shaft 150. It is directly sucked into the cylinder bores 131 and 141 through either inlet.

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 cool the refrigerant sucked into the swash plate chamber 136 through the cylinder bore 131 and 141. It is designed to supply lubricating oil to the part where lubrication is required in the configuration of the fixed-shaft type swash plate compressor of the drive shaft-integrated suction rotary valve type that is moved to the engine. The same method and configuration can be applied to, 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, oil piggybacked on the refrigerant sucked into the drive shaft is smoothly on the outer peripheral surface of the drive shaft through the chamfer processing portion formed on the edge of the outlet of the drive shaft. In order to provide sufficient lubrication and sealing properties between the outer peripheral surface of the drive shaft and the inner circumferential surface of the shaft support hole where lubrication is required, it is possible to prevent the deterioration of the lubrication effect due to the lack of oil in the compressor, thereby improving the performance of the compressor. External heat exchangers that do not require lubrication may reduce the circulation of oil to improve heat exchange efficiency of the heat exchanger, thereby maximizing the improvement of the performance of the air conditioning system as a whole.

Claims (4)

The swash plate 160 rotating in the swash plate chamber 136 inside the compressor 100 is inclinedly coupled to the inside, and the refrigerant sucked into the compressor 100 from the outside may move to the cylinder bores 131 and 141. A flow path 151 is formed so that at least one inlet 152a and 152b is formed in the flow path 151, and a pair of outlets 153a are spaced apart from the inlet 152a and 152b. 153b) drive shafts 150 formed in opposite directions from 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; In the compressor comprising a valve unit 190 interposed between the cylinder block 130, 140 and the front, rear housing 110, 120, respectively, At least one chamfering part 153a-1 and 153a-2 is formed at the edge of at least one of the pair of outlets 153a and 153b along the rotational direction of the drive shaft. The chamfer processing unit (153a-1) is a compressor, characterized in that formed on one side of the outer edge surface of the outlet (153a). delete The method of claim 1, The chamfer processing unit (153a-2) is characterized in that formed on the entire inner end surface surrounding the edge of the outlet (153a). 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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