KR101041949B1 - Compressor - Google Patents

Abstract

The present invention relates to a compressor, and more particularly, in a structure in which refrigerant is sucked into a cylinder bore through a hollow drive shaft, an oil supply means is formed on a swash plate to supply oil separated from the swash plate directly to the swash plate chamber, thereby providing a driving unit. By allowing oil to remain inside the compressor while lubricating, it improves the performance of the compressor and reduces the circulation of oil by heat exchangers outside the compressor, thereby improving the overall performance of the heat exchanger as well as the air conditioner. The compressor can reduce the amount of oil injected into the air conditioner.

In the present invention, the swash plate 160 that rotates in the swash plate chamber 136 inside the compressor 100 is inclined, and the refrigerant sucked into the swash plate chamber 136 passes through the swash plate 160 to form a cylinder bore ( A drive shaft 150 in which a flow path 151 is formed to move to 131 and 141; The drive shaft 150 is rotatably installed in the shaft support holes 133 and 143, and a plurality of cylinder bores 131 and 141 are formed at both sides of the swash plate chamber 136 and the flow path of the drive shaft 150 is provided. The shaft support holes 133 and 143 and each cylinder bore 131 and 141 may be sucked into the cylinder bore 131 and 141 sequentially during the rotation of the drive shaft 150. Front and rear cylinder blocks 130 and 140 formed with suction passages 132 and 142 communicating therewith; A plurality of pistons (170) mounted on an outer circumference of the swash plate (160) via a shoe (167) and reciprocating in the cylinder bores (131, 141) in conjunction with a rotational movement of the swash plate (160); Front and rear housings 110 and 120 coupled to both sides of the front and rear cylinder blocks 130 and 140 and having discharge chambers 111 and 121 formed therein, respectively; A valve unit 180 interposed between the front and rear cylinder blocks 130 and 140 and the front and rear housings 110 and 120, respectively; It is formed on the swash plate 160 and is characterized in that it comprises an oil supply means 165 for separating the oil from the refrigerant passing through the swash plate 160 to supply to the swash plate chamber 136.

Compressor, drive shaft, flow path, swash plate, oil supply means, inlet port, connection flow path, supply hole

Description

Compressor

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

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

3 is a perspective view of a compressor according to the present invention;

4 is an exploded perspective view showing a compressor according to the present invention;

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

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

7 is a cross-sectional view taken along line B-B in FIG. 6;

8a to 8c is a schematic perspective view showing a process in which the refrigerant in the swash plate chamber is sucked into the cylinder bore through the flow path in accordance with the rotation of the drive shaft in the compressor according to the present invention,

9 is an exploded perspective view showing a valve unit 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

113,123,138,148,184: Bolt hole 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: swash chamber 140: rear cylinder block

146: suction port 147: discharge port

150: drive shaft 151: flow path

152,162: Inlet 153: Communication Road

155: thrust bearing

160: Saphan 161: Hub

163: connection path 164: supply hole

165: oil supply means

167: shoe 170: piston

180: valve unit 181: valve plate

181a: refrigerant discharge hole 181b: communication path

182: discharge lead valve 182a: valve plate

183: fixing pin 190: 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, an oil supply means is formed on a swash plate to directly supply oil separated from the swash plate to a swash plate chamber. By lubricating the oil, the oil remains inside the compressor, which improves the performance of the compressor and reduces the circulation of oil by external heat exchangers other than the compressor, thereby improving the overall performance of the heat exchanger as well as the air conditioner. A compressor that can be made compact and that also reduces the amount of oil injected into the air conditioner.

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 bolt holes 16 are formed in the circumferential direction of the suction chamber 11. Through the bolt 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 type 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 with the refrigerant to circulate the air conditioner system for lubrication of the driving part (swash plate, shoe, piston, bearing, etc.) and the friction part inside the compressor.

In other words, in the air conditioner system, the parts requiring oil are the driving part and the friction part inside the compressor, and the other parts (evaporator, condenser, receiver dryer, expansion valve) do not need oil, and the oil is not a heat exchanger (evaporator, condenser) When it is adhered to the wall of the), the heat exchange performance of the heat exchanger of the air conditioning system is deteriorated because it acts as a resistance to prevent heat exchange with the outside. This makes it difficult to make the volume of the heat exchanger small in the air conditioning system.

Therefore, the amount of oil contained in the air conditioner system should be reduced, but in this case, the internal lubrication of the compressor is insufficient, and there is a concern that the compressor loses its compression performance early due to excessive heat generation and wear in the compressor.

An object of the present invention for solving the above problems is to form an oil supply means in the swash plate in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft to supply the oil separated from the inside of the swash plate directly to the swash plate chamber By lubricating the drive unit, the oil remains inside the compressor, which improves the performance of the compressor and reduces the circulation of oil through external heat exchangers other than the compressor, thereby improving the overall performance of the heat exchanger as well as the air conditioner. It is to provide a compressor that can be made more compact and can also reduce the amount of oil injected into the air conditioner.

The present invention for achieving the above object is a swash plate rotating in the swash plate chamber in the compressor is inclined, the drive shaft formed therein to allow the refrigerant sucked into the swash plate chamber to move through the swash plate to the cylinder bore; The drive shaft is rotatably installed in the shaft support hole and a plurality of cylinder bores are formed on both sides of the swash plate chamber, and the refrigerant sucked into the flow path of the drive shaft can be sucked into each cylinder bore sequentially during rotation of the drive shaft. A front and rear cylinder block having a suction passage communicating the shaft support hole and each cylinder bore; A plurality of pistons mounted on an outer circumference of the swash plate and reciprocating in the cylinder bore in conjunction with a rotational movement of the swash plate; Front and rear housings coupled to both sides of the front and rear cylinder blocks and having discharge chambers formed therein; A valve unit interposed between the front and rear cylinder blocks and the front and rear housings, respectively; It is formed on the swash plate and characterized in that it comprises an oil supply means for separating the oil from the refrigerant passing through the swash plate to the swash plate chamber.

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 a perspective view showing a compressor according to the invention, Figure 4 is an exploded perspective view showing a compressor according to the invention, Figure 5 is a cross-sectional view showing a compressor according to the invention, Figure 6 is a drive shaft in the compressor according to the invention Figure 7 is an exploded perspective view showing a state in which the swash plate is disassembled, Figure 7 is a cross-sectional view taken along the line BB in Figure 6, Figures 8a to 8c is a refrigerant in the swash plate chamber through the flow path in accordance with the rotation of the drive shaft in the compressor according to the present invention 9 is a schematic perspective view illustrating a process of suctioning a bore, and FIG. 9 is an exploded perspective view illustrating a valve unit in a compressor according to the present invention.

As shown, the compressor 100 according to the present invention, the compressor 100 according to the present invention, the drive shaft 150 in which the swash plate 160 rotating in the swash plate chamber 136 inside the compressor 100 is inclined inclined. And the front and rear cylinder blocks 130 and 140 rotatably installed in the shaft support holes 133 and 143 through the shoe 167 on the outer circumference of the swash plate 160. And a plurality of pistons 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 rotational movement of the swash plate 160. 170 and the front and rear housings 110 and 120 coupled to both sides of the front and rear cylinder blocks 130 and 140 and having discharge chambers 111 and 121 formed therein, respectively. It is configured to include a valve unit 180 interposed between the rear cylinder block 130, 140 and the front, rear housing 110, 120.

The front and rear housings 110 and 120 are formed with a plurality of bolt holes 113 and 123 at edges of the inside, and the front and rear housings 110 through the bolt holes 113 and 123. 120 is fastened / fixed with the mutual bolt 190 in the state in which the above components are assembled. Of course, bolt 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).

The swash plate 160 rotating in the swash plate chamber 136 is obliquely coupled to the drive shaft 150, and is sucked into the swash plate chamber 136 through the suction port 146 of the rear cylinder block 140. A flow path 151 is formed in communication with the swash plate chamber 136 and the cylinder bores 131, 141 so that the suction refrigerant may move through the swash plate 160 to the cylinder bores 131 and 141.

Inlets 152 and 162 of the flow path 151 are formed to communicate with the swash plate chamber 136, the communication path 153 of the front and rear cylinder blocks 130, 140 to be described below It is formed to communicate with each suction passage (132, 142).

Here, the communication path 153 of the flow path 151 is formed on both sides of the flow path 151 in opposite directions to each cylinder bore provided on both sides of the swash plate chamber 136 when the drive shaft 150 is rotated ( The refrigerant may be sucked into the 131 and 141 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 piston 170 coupled to the outer circumference of the swash plate 160 performs the same suction or compression stroke, so that the flow path ( Both communication paths 153 of the 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 communication path 153 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.

In addition, the swash plate 160 receives oil from the refrigerant passing through the swash plate 160 while the refrigerant of the swash plate chamber 136 passes through the swash plate 160 and flows into the flow path 151 of the drive shaft 150. The oil supply means 165 is formed to be separated and immediately returned to the swash plate chamber 136 and supplied.

That is, when the drive shaft 150 and the swash plate 160 rotate, oil is separated from the refrigerant passing through the inside of the swash plate 160 by the centrifugal force at this time, and the swash plate chamber 136 through the oil supply means 165. As it is supplied to the) and the process is repeated, the oil is circulated while remaining inside the compressor (100).

The oil supply means 165 forms inlets 152 and 162 on the swash plate 160 and the driving shaft 150 so that the refrigerant in the swash plate chamber 136 flows into the flow path 151, respectively. The inner circumferential surface of the swash plate 160 is provided with a connection flow passage 163 for communicating the respective inlets 152 and 162, and at one end of the connection flow passage 163 in the connection flow passage 163. It is made by forming a supply hole 164 for supplying the collected oil to the swash plate chamber (136).

That is, the inlets 152 and 162 of the flow path 151 are formed to penetrate the drive shaft 150 and the hub 161 side of the swash plate 160, respectively, but at this time, the coolant flows in the drive shaft 150. By arranging the inlet 152 and the inlet 162 of the swash plate 160 alternately with each other, the length of the connection passage 163 is increased by that length, thereby increasing the time for the refrigerant to stay inside the swash plate 160. The amount of oil separated from the refrigerant is also increased.

At this time, the oil supply means 165 formed on the swash plate 160 may be formed in plurality.

That is, as shown in the drawing, the oil supply means 165 is formed in the diagonal direction on each side of the hub 161 with respect to the swash plate 160, respectively.

In addition, one end of the connection passage 163 in which the supply hole 164 is formed is preferably formed stepwise with the inlet 152 formed in the drive shaft 150 so that oil may be accumulated.

In addition, the front and rear cylinder blocks 130 and 140 are each formed with a plurality of cylinder bores 131 and 141 on both sides of the swash plate chamber 136, the center of the drive shaft 150 to be rotatable Axial support holes 133 and 143 are formed to be supported.

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.

In addition, 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 / fixed while being inserted into the fixing hole 112 formed in the surface.

On the other hand, the thrust bearing 155 is installed on both sides of the swash plate 160 in the swash plate chamber 136 to support the rotational movement of the swash plate 160. Therefore, when the oil separated from the refrigerant through the oil supply means 165 is discharged through the supply hole 164, the oil is moved to the swash plate chamber 136 through the gap of the bearing 155.

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 at this time, the swash plate A plurality of pistons (170) in conjunction with the rotational movement of the 160 is the action of inhaling and compressing the refrigerant while reciprocating inside the cylinder bore (131, 141) of the front and rear cylinder blocks (130, 140). It will be repeated.

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 cylinder bore 131 (through the flow path 151 of the drive shaft 150) ( 141 is directly sucked in, and during the compression stroke of the piston 170, the refrigerant sucked into the cylinder bore (131, 141) is compressed by the piston 170, the front and rear housing (110, 120) Is discharged into the discharge chambers 111 and 121 of the discharge chamber and discharged through the discharge passages 134 and 144 and the muffler 135 and 145 of the front and rear cylinder blocks 130 and 140 to the discharge port 147. Will be.

Hereinafter, the refrigerant circulation process will be described in more detail.

First, a coolant is supplied into the swash plate chamber 136 through the suction port 146, and the coolant supplied to the swash plate chamber 136 is formed in the drive shaft 150 when the drive shaft 150 rotates. Through 151, the respective cylinder bores 131 and 141 are sequentially sucked.

That is, as shown in FIG. 8B, when the drive shaft 150 rotates, the communication path 153 of the flow path 151 formed on the drive shaft 150 also rotates together, wherein the communication path 153 is the cylinder bore ( The swash plate chamber 136 communicates with the cylinder bores 131 and 141 in the process of passing through the suction passages 132 and 142 which are in communication with the 131 and 141. It is sucked into the cylinder bores (131, 141) through the 151.

Here, the refrigerant in the swash plate chamber 136 is continuously supplied to the cylinder bores 131 and 141 while the communication passage 153 and the suction passage 132 and 142 of the flow passage 151 communicate with each other.

In addition, while the refrigerant in the swash plate chamber 136 is sucked into the cylinder bores 131 and 141 through the flow path 151 of the drive shaft 150, the communication path 153 continuously rotates as shown in FIG. If the suction passage 132, 142 is completely in progress, the communication between the swash plate chamber 136 and the cylinder bore 131, 141 is blocked, and the refrigerant suction to the cylinder bore 131, 141 is blocked. After that, the compression stroke of the piston 170 is started in the cylinder bores 131 and 141 in which refrigerant suction is blocked.

As such, the swash plate chamber 136 sequentially communicates with each of the cylinder bores 131 and 141 through the flow path 151 of the drive shaft 150 while the driving shaft 150 rotates, and thus the refrigerant in the swash plate chamber 136. Is sucked into each cylinder bore (131, 141), and the compression stroke of the piston 170 proceeds sequentially in the cylinder bore (131, 141), the suction is completed.

Of course, the flow path 151 formed on the drive shaft 150 simultaneously connects / communicates with the cylinder bores 131 and 141 formed in the swash plate chamber 136 and the front and rear cylinder blocks 130 and 140, respectively. Since the cylinder bores 131 and 141 of the front and rear cylinder blocks 130 and 140 are simultaneously sucked and compressed.

Subsequently, during the compression stroke of the piston 170, the refrigerant in the cylinder bores 131 and 141 is compressed. At this time, the valve plate 182a of the discharge lead valve 182 is elastically deformed and the valve plate ( By opening the refrigerant discharge hole 181a of the 181, the cylinder bores 131 and 141 and the discharge chambers 111 and 121 of the front and rear housings 110 and 120 are in communication with each other. The compressed refrigerant in the 141 is moved to the discharge chambers 111 and 121 of the front and rear housings 110 and 120.

Thereafter, the refrigerant moved to the discharge chambers 111 and 121 of the front and rear housings 110 and 120 is a muffler along the discharge passages 134 and 144 of the front and rear cylinder blocks 110 and 120. It is discharged through the discharge port 147 after moving into the (135) (145).

Meanwhile, referring to the oil circulation process in the compressor 100, oil is mixed in the suction refrigerant supplied to the swash plate chamber 136, and the refrigerant flows into the inlet 162 of the swash plate 160. After the movement along the connection flow path 163 is introduced into the flow path 151 through the inlet 152 of the drive shaft 150, in this process by the rotation of the drive shaft 150 and the swash plate 160 The oil is separated from the refrigerant moving through the connection channel 163 by the centrifugal force and at the same time, the separated oil is collected at one end while flowing along the inner wall of the connection channel 163. The oil collected at one end of the connection passage 163 is supplied to the swash plate chamber 136 through the supply hole 164.

As such, the oil separated from the refrigerant through the oil supply means 165 of the swash plate 160 is introduced into the flow path 151 of the driving shaft 150 from the swash plate chamber 136. ) Is supplied back to the lubrication unit to lubricate the driving unit (swash plate, shoe, piston, bearing, etc.) inside the swash plate chamber 136, and to allow oil to remain in the compressor 100 while repeating the above-described circulation process. As the external heat exchanger (not shown) except for the compressor 100 reduces the circulation of oil, the performance of the heat exchanger can be improved, and the heat exchanger can be made more compact, as well as the amount of oil injected into the air conditioner. It can be reduced.

As described above, in the present invention, the oil is separated from the refrigerant through the oil ball water supply stage 165 formed in the swash plate 160 and the oil thus separated is circulated to the swash plate chamber 136 so that the oil is compressed in the compressor 100. For the sake of simplicity, the present invention has been described only in the case where the configuration to remain inside is applied to the fixed-capacity swash plate compressor 100, but the present invention is not limited thereto. It can be applied as a configuration, and the same effect can be obtained.

According to the present invention, by forming an oil supply means in the swash plate to return the oil separated from the inside of the swash plate directly to the swash plate chamber so that the oil remains in the compressor while lubricating the drive unit, the performance of the compressor is improved External heat exchangers other than compressors reduce the circulation of oil to improve the overall performance of the heat exchanger as well as the air conditioner, thereby making the heat exchanger more compact and reducing the amount of oil injected into the air conditioner.

Claims (4)

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 swash plate chamber 136 passes through the swash plate 160 so that the cylinder bores 131 and 141 are rotated. A driving shaft 150 in which a flow path 151 is formed so as to be moved to; The drive shaft 150 is rotatably installed in the shaft support holes 133 and 143, and a plurality of cylinder bores 131 and 141 are formed at both sides of the swash plate chamber 136 and the flow path of the drive shaft 150 is provided. The shaft support holes 133 and 143 and each cylinder bore 131 and 141 may be sucked into the cylinder bore 131 and 141 sequentially during the rotation of the drive shaft 150. Front and rear cylinder blocks 130 and 140 formed with suction passages 132 and 142 communicating therewith; A plurality of pistons (170) mounted on an outer circumference of the swash plate (160) via a shoe (167) and reciprocating in the cylinder bores (131, 141) in conjunction with a rotational movement of the swash plate (160); Front and rear housings 110 and 120 coupled to both sides of the front and rear cylinder blocks 130 and 140 and having discharge chambers 111 and 121 formed therein, respectively; A valve unit 180 interposed between the front and rear cylinder blocks 130 and 140 and the front and rear housings 110 and 120, respectively; It is formed on the swash plate 160 and comprises an oil supply means 165 for separating the oil from the refrigerant passing through the swash plate 160 to supply to the swash plate chamber 136, The oil supply means 165 forms inlets 152 and 162 on the swash plate 160 and the driving shaft 150 so that the refrigerant in the swash plate chamber 136 flows into the flow path 151, respectively. The inner circumferential surface of the swash plate 160 is provided with a connection flow passage 163 for communicating the respective inlets 152 and 162, and at one end of the connection flow passage 163 in the connection flow passage 163. And a supply hole (164) for supplying the collected oil to the swash plate chamber (136). delete The method of claim 1, One end of the connection passage (163) formed with the supply hole (164), characterized in that formed in step with the inlet 152 formed in the drive shaft (150) so that the oil can be accumulated. The method of claim 1, The flow path (151) is characterized in that the compressor further comprises a communication path (153) for communicating with the suction passage (132, 142) of the front and rear cylinder block (130) (140).

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