KR101089980B1 - Compressor - Google Patents

Abstract

The present invention relates to a compressor, in a structure in which a refrigerant is sucked into a cylinder bore through a hollow drive shaft, oil contained in the refrigerant so that oil carried on the refrigerant sucked into the drive shaft does not flow out to a heat exchanger or the like that does not require lubricity. By separating the oil efficiently into the swash plate chamber where lubrication is required, thereby preventing the deterioration of lubrication action due to the lack of oil in the swash plate chamber, thereby improving the performance of the compressor and improving the heat exchange efficiency of the heat exchanger. The aim is to maximize the improvement of the performance of the air conditioning system as a whole.

To this end, in the present invention, the swash plate 160 rotating in the swash plate chamber 136 inside the compressor 100 is inclinedly coupled thereto, and the refrigerant sucked into the compressor 100 from the outside is cylinder bores 131 and 141. A flow path 151 is formed so as to move in a direction, and a pair of inlets 152a and 152b are formed on both sides of the flow path 151 so as to overlap in opposite directions, and the pair of inlets 152a A drive shaft 150 spaced apart from the 152b and formed with a pair of outlets 153a and 153b on opposite sides of the flow path 151 in opposite directions; 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); 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; It characterized in that it comprises a valve unit 180 interposed between the cylinder block 130, 140 and the front, rear housing 110, 120, respectively.

Compressor, drive shaft, flow path, oil, oil shortage, swashroom

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.

Figure 6 is a cross-sectional view showing the structure of the drive shaft 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 152a, 152b: Entrance

153a, 153b: exit 160: swash plate

161: hub 165: shoe

170: piston 180: valve unit

181: valve plate 181a: refrigerant discharge hole

181b: communication path 182: discharge lead valve

182a: valve plate 183: fixed pin

190: bolts

The present invention relates to a compressor, and more particularly, in a structure in which a refrigerant is sucked into a cylinder bore through a hollow drive shaft, oil that is carried on the refrigerant sucked into the drive shaft does not flow out to a heat exchanger or the like that does not require lubricity. By efficiently separating the oil contained in the oil to remain in the swash chamber that requires lubrication, thereby preventing the degradation of the lubrication action due to the lack of oil in the swash chamber to improve the performance of the compressor, as well as heat exchanger The present invention relates to a compressor that can maximize the performance improvement of the air conditioning system as a whole by improving the heat exchange efficiency.

In general, an automobile compressor converts a refrigerant gas discharged from an evaporator into a refrigerant gas in a high temperature and high pressure state, which is easily liquefied by sucking the refrigerant gas, and discharges the refrigerant gas into a condenser.

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. 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.

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 above-mentioned prior arts use compressors due to the lack of oil in the swash plate chamber where lubricity is required by the oil piggybacked in the refrigerant sucked into the drive shaft and exits directly to the heat exchanger (condenser, evaporator) that does not require lubricity through the cylinder bore. Lack of internal lubrication may cause the compressor to lose its compressive performance prematurely due to excessive heat generation and wear in the compressor.In addition, the oil adheres to the wall of the heat exchanger and acts as a resistance that prevents heat exchange with the outside. There was a problem of lowering the heat exchange performance of the heat exchanger.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft, a heat exchanger, etc., in which the oil piggybacked on the refrigerant sucked into the drive shaft is not required. By effectively separating the oil contained in the refrigerant so that it does not leak out, the oil remains in the swash plate chamber where lubrication is required, thereby preventing the deterioration of lubrication action due to the lack of oil in the swash plate chamber, thereby improving the performance of the compressor. Of course, it is an object of the present invention to provide a compressor that can maximize the improvement of the performance of the air conditioning system as a whole by improving the heat exchange efficiency of the heat exchanger.

The present invention for achieving the above object 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, both sides of the flow path There is a pair of inlets overlapping each other in the opposite direction, but when viewed from any one inlet direction is formed in the structure of the other one is partially visible, the pair is spaced apart from the pair of the inlet and the other side of the pair Drive shafts formed in opposite directions to each other; 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; Front and rear housings coupled to both sides of the cylinder block and having discharge chambers formed therein; And a valve unit interposed between the cylinder block and the front and rear housings, respectively.

In addition, in the present invention, the inlet of the flow passage is formed to communicate with the swash plate chamber, the outlet is characterized in that it is formed to communicate with the suction passage of the cylinder block.

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 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 Is a cross-sectional view showing the structure of a drive shaft in the compressor according to the present invention.

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 such a structure of the compressor, it is possible to efficiently separate the oil piggybacked on the refrigerant sucked into the drive shaft through the swash chamber from the outside, the remaining oil is more remaining in the drive unit requiring lubricity in the swash chamber By improving the lubrication and durability of the drive unit to improve the performance 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 180 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 with the mutual bolts 190 in the state in which the above components are assembled. Of course, bolt fastening holes 138, 148, and 184 are formed in the front and rear cylinder blocks 130 and 140 and the valve unit 180 to allow the bolt 190 to pass therethrough.

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 communicating with the swash plate chamber 136 and the cylinder bores 131 and 141 is formed to move through the 160 to the cylinder bores 131 and 141.

The inlets 152a and 152b of the flow path 151 are formed to communicate with the swash plate chamber 136, and the outlets 153a and 153b are each suction passages of the front and rear cylinder blocks 130 and 140. 132 and 142.

Here, the inlets 152a and 152b of the flow path 151 penetrate through one side of the hub 161 and the driving shaft 150 of the swash plate 160, and the pair of inlets 152a and 152b is formed. ) Is formed in a structure overlapping with each other by "S" in the opposite direction as shown in FIG. That is, the inlets 152a and 152b of the flow path 151 of the hub 161 and the drive shaft 150 of the swash plate 160 are partially visible when viewed from one inlet direction. It penetrates both sides, respectively.

In the compressor proposed by Patent Application No. 2005-74186 described above, when two inlets of the flow path are formed, they are formed at positions spaced apart from each other by a predetermined distance, so that the refrigerant sucked into the flow path by the rotation of the drive shaft. Although the oil may not easily escape to any one of the inlets, the inlets 152a and 152b of the flow path 151 may be partially overlapped as in the present invention, so that oil in the refrigerant sucked into the flow path is partially opposed. There is an advantage that can easily exit through any one entrance.

That is, according to the structure of the present invention, the refrigerant sucked through the pair of inlets 152a and 152b by the rotation of the drive shaft 150 is subjected to centrifugal force, and at this time, a portion of the oil contained in the refrigerant is the drive shaft 150 It flows to the cylinder bore 131 side through the flow path 151, and the remaining part thereof is easily separated from the refrigerant gas by directly flowing out through any one inlet partially opposed by its own weight.

The oil separated in this way is driven on the outer circumferential surface of the drive shaft 150 to remain in the swash plate chamber 136, and a driving part requiring lubricity in the swash plate chamber 136, for example, the swash plate 160 and the shoe 165, and the piston ( 170 and the sliding contact between the shoe 165 is supplied. As a result, it is possible to solve the fixing of the compressor due to the decrease in the lubrication action due to the lack of oil in the swash plate chamber of the compressor, so that the lubrication action of the compressor can be stably performed without reducing the durability of the compressor.

In addition, a part of relatively high viscosity oil is confined in the swash plate chamber 136 through the inlets 152a and 152b of the flow path 151 to form an air conditioning system with the outside through the discharge port 147 which will be described later. Since the amount of circulation of oil flowing to the condenser, the evaporator, the expansion valve, etc. can be reduced, the performance of the heat exchanger can be improved, making the heat exchanger more compact, as well as the amount of oil injected into the air conditioner.

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 to rotate the drive shaft 150. At the same time, the refrigerant may be sucked into each cylinder bore 131 and 141 provided at both sides of the swash plate chamber 136.

That is, since the swash plate 160 is formed to be inclined, among the plurality of pistons 170 coupled to the outer circumference of the swash plate 160, pistons 170 disposed in opposite directions to each other perform 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 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.

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 180 has a plurality of refrigerant discharge holes 181a so as 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 of a valve plate 181 and a discharge lead valve 182 installed at one side of the valve plate 181 to open and close the refrigerant discharge hole 181a.

That is, the discharge lead valve 182 is installed in the discharge chambers 111 and 121 of the front and rear housings 110 and 120 with respect to the valve plate 181 to compress the stroke of the piston 170. The valve plate 182a is elastically deformed to open the refrigerant discharge hole 181a and to close the refrigerant discharge hole 181a during the suction stroke.

In addition, the valve plate 181 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 181b is formed to communicate the discharge chambers 111 and 121 and the discharge passages 134 and 144 so as to be discharged to the discharge port 147 via the 144.

Meanwhile, the valve unit 180 has fixing pins 183 provided at both sides of the valve plate 181 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 interlocked with the rotational motion of the 160 may reciprocate the inside of the cylinder bores 131 and 141 of the rear cylinder blocks 130 and 140 while inhaling and compressing the refrigerant. It will be repeated.

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. The drive shaft is formed by applying a structure in which inlet portions 152a and 152b are partially overlapped on both sides of the flow path 151 of the drive shaft 150 to the configuration of the fixed displacement swash plate type compressor of the drive shaft integrated suction rotary valve type. A portion of the oil in the refrigerant sucked into the flow path 151 according to the rotation of the 150 is separated to return to the swash plate chamber 136 through any one of the inlets of the flow path 151 so that the separated oil is lubricious. It is intended to remain inside the swash plate chamber 136 required, and can be applied to the various types of compressors such as the electric compressor as well as the fixed capacity swash plate compressor in the same manner and configuration, and obtain the same effect That will.

According to the present invention described above, in a structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft, a part of the oil piggybacked on the refrigerant sucked into the drive shaft is separated and returned to the swash plate chamber to lubricate the drive unit requiring lubrication. It improves the performance of the compressor by preventing the deterioration of lubrication action due to the lack of oil in the swash chamber, and improves the heat exchange efficiency of the heat exchanger by reducing the circulation of oil in the external heat exchanger that does not require lubricity. The performance improvement of the system can be maximized.

Claims (3)

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 a pair of inlets 152a and 152b are overlapped in opposite directions on both sides of the flow path 151, but the other inlet is partially visible when viewed from one inlet direction. A driving shaft 150 spaced apart from the pair of inlets 152a and 152b and having a pair of outlets 153a and 153b on opposite sides of the flow path 151 in opposite directions; 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); 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; And a valve unit (180) interposed between the cylinder block (130) (140) and the front and rear housings (110) (120), respectively. The method of claim 1, Inlets 152a and 152b of the flow path 151 are formed to communicate with the swash plate chamber 136, and outlets 153a and 153b are suction passages 132 of the cylinder blocks 130 and 140 ( 142, characterized in that the compressor is in communication with. The method of claim 1, The valve unit 180 has a plurality of refrigerant discharge holes 181a to communicate the cylinder bores 131 and 141 with the discharge chambers 111 and 121 of the front and rear housings 110 and 120. And a discharge lead valve (182) formed at one side of the valve plate (181) and the valve plate (181) to open and close the discharge hole (181a).

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