KR101031811B1 - 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, oil separated from the inside of the drive shaft is moved to the front seal area of the drive shaft to assist lubrication, and By returning to the swash plate chamber to lubricate the driving unit, oil remains inside the compressor, improving the performance of the compressor and reducing the circulation of oil outside the compressor, thereby improving the overall performance of the heat exchanger as well as the air conditioner. It is a compressor that can make the machine more compact and 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 compressor 100 from the outside into the cylinder bores 131 and 141. A drive shaft 150 in which a flow path 151 is formed to move; 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 blocks 130 and 140 and the front and rear housings 110 and 120, respectively. The drive shaft 150 includes the flow path 151 and the An oil passage 155 is formed to communicate the drive shaft seal region 115 of the front housing 110, and the front housing 110 is partitioned from the discharge chamber 111 and the drive shaft seal region 115. And an oil chamber 117 in communication with the bolt hole 138 of the cylinder block 130, and the oil separated from the refrigerant in the flow path 151 of the drive shaft 150 through the oil passage 155. After supplying to the seal area 115, the oil is returned to the swash plate chamber 136 through the bolt hole 138 of the oil chamber 117 and the cylinder block 130 to form an oil circulation passage. It features.

Compressor, drive shaft, flow path, oil passage, front housing, oil chamber

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 a perspective view illustrating 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. 5;

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;

10 is a cross-sectional view showing another example of the compressor according to the present invention in which an inlet of the flow path is formed at the rear end of the drive shaft.

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 115: Drive shaft sealing area

117: oil seal

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: swash chamber 140: rear cylinder block

146: suction port 147: discharge port

150: drive shaft 151: flow path

152: entrance 153: exit

155: oil passage

160: Saphan 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: 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, oil separated from the inside of the drive shaft is moved to the front seal area of the drive shaft to assist lubrication, and By returning to the swash plate chamber to lubricate the driving unit, oil remains inside the compressor, improving the performance of the compressor and reducing the circulation of oil outside the compressor, thereby improving the overall performance of the heat exchanger as well as the air conditioner. It is a compressor that can make the machine more compact and reduce 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 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 other words, in the air conditioner system, the part that needs oil is 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 does not need heat. The heat exchange performance of the heat exchanger of the air conditioning system is deteriorated because it acts as a resistance that prevents heat exchange with the outside by adhering to the wall of the wall. 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 lubricate the oil separated in the drive shaft to the front seal area of the drive shaft in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft By returning the oil back to the swash chamber to lubricate the driving unit, the oil remains inside the compressor, improving the performance of the compressor and reducing the circulation of oil outside the compressor, thereby improving the overall performance of the heat exchanger as well as the air conditioner. In addition, to provide a compressor that can make the heat exchanger more compact and 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 inside the compressor is inclined, the drive shaft formed therein so that the refrigerant sucked into the compressor from the outside to move to the cylinder bore; 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, wherein the drive shaft forms an oil passage communicating the flow path and the drive shaft seal area of the front housing, and the front housing. An oil chamber is formed in the discharge chamber and communicates with the drive shaft seal area and the bolt hole of the cylinder block. The oil separated from the refrigerant in the flow path of the drive shaft is supplied to the drive shaft seal area through the oil passage. To return to the swash plate chamber through the bolt hole of the oil chamber and the cylinder block to form an oil circulation flow path.

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 7 is a cross-sectional view taken along line BB of FIG. 5, and FIGS. 8A to 8C show a cylinder bore of a refrigerant in a swash plate chamber as a rotation of a drive shaft in a compressor according to the present invention. Figure 9 is a schematic perspective view showing a process of suction, Figure 9 is an exploded perspective view showing a valve unit in the 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 165 on the outer circumference of the swash plate 160. A plurality of pistons mounted and reciprocating in 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 association 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, respectively, and having discharge chambers 111 and 121 formed therein. It is configured to include a valve unit 180 interposed between the 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).

At this time, a seal member or the like is interposed between the front housing 110 and the drive shaft 150 to form a seal area 115 to seal the space between the front housing 110 and the drive shaft 150. .

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

The inlet 152 of the flow path 151 is formed to communicate with the swash plate chamber 136, the outlet 153 is each suction passage 132 of the front and rear cylinder blocks 130, 140 to be described below. 142 is formed to communicate with.

Here, the inlet 152 of the flow path 151 is formed penetrating through one side of the hub 161 and the drive shaft 150 of the swash plate 160.

Meanwhile, only one inlet 152 of the flow path 151 may be formed on one side of the driving shaft 150, or two may be formed in opposite directions.

In addition, the outlet 153 of the flow path 151 is formed on both sides of the flow path 151 in opposite directions to each cylinder bore 131 provided on both sides of the swash plate chamber 136 when the drive shaft 150 rotates. At the same time, the refrigerant can be sucked into the 141.

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

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

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

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

In the compressor of the present invention configured as described above, oil may remain in the compressor 100 while lubricating the driving unit (swash plate, shoe, piston, etc.) inside the drive shaft seal area 115 and the swash plate chamber 136. So that an oil circulation path is formed.

The oil circulation passage forms an oil passage 155 for communicating the flow path 151 and the drive shaft seal region 115 in the front housing 110 to the drive shaft 150, and the discharge to the front housing 110. Compartmented with the seal 111 and in communication with the drive shaft seal area 115 and the communication path 118 and at the same time to form an oil chamber 117 in communication with the bolt hole 138 of the cylinder block 130 do.

Therefore, after the oil separated from the refrigerant by the rotational force of the drive shaft 150 in the flow path 151 of the drive shaft 150 is supplied to the drive shaft seal area 115 through the oil passage 155, the oil is supplied again. It is supplied to the oil chamber 117 through the communication path 118 and then returned to the swash plate chamber 136 through the bolt hole 138 of the cylinder block 130.

Accordingly, the external heat exchanger (not shown) except for the compressor 100 may reduce the circulation of the oil, thereby improving the performance of the heat exchanger, thereby making the heat exchanger more compact, as well as the oil injected into the air conditioner. The amount can also be reduced.

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 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 driving shaft 150 rotates, the outlet 153 of the flow path 151 formed on the driving shaft 150 also rotates together, wherein the outlet 153 is the cylinder bore 131. 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 141, so that the refrigerant in the swash plate chamber 136 flows through the flow path 151. It is sucked into the cylinder bore (131, 141) through.

Here, while the outlet 153 and the suction passages 132 and 142 of the flow path 151 overlap, the refrigerant in the swash plate chamber 136 is continuously sucked into the cylinder bores 131 and 141.

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 outlet 153 is continuously rotated as shown in FIG. If the suction passage 132, 142 is completely out of the communication between the swash plate chamber 136 and the cylinder bore (131, 141) is blocked, the refrigerant suction to the cylinder bore (131, 141) side 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 cylinder bores 131 and 141 sequentially communicate with the swash plate chamber 136 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 inside the compressor 100, oil is mixed in the suction refrigerant supplied to the swash plate chamber 136, and the refrigerant flows along the flow path 151 of the drive shaft 150. It is sucked into the bore (131, 141), wherein the oil is mixed in the refrigerant moving along the flow path 151 of the drive shaft 150 is separated from the refrigerant by the rotational force of the drive shaft 150, so separated The oil moves to the drive shaft seal area 115 in the front housing 110 through the oil passage 155 on the inner wall of the flow path 151 to assist lubrication.

Subsequently, the oil in the drive shaft seal area 115 is moved to the oil chamber 117 through the communication path 118 formed in the front housing 110, and then the oil in the oil chamber 117 is transferred to the front cylinder. The bolt hole 138 formed in the block 130 is returned to the swash plate chamber 136 to lubricate the driving unit (swash plate, shoe, piston, etc.) inside the swash plate chamber 136, and repeat the above-described circulation process. While the oil is to remain inside the compressor (100).

On the other hand, Figure 10 is a cross-sectional view showing a case in which the inlet of the flow path is formed in the rear end of the drive shaft according to another embodiment of the present invention, that is, the suction port 146 of the rear housing 120 As it is formed in the center of the outer surface is formed through the rear end of the drive shaft 150 to communicate with the inlet 152 of the flow path 151 also the suction port 146. In this case, the outlet 153 of the flow path 151 is formed to communicate with the suction passages 132 and 142 of the cylinder blocks 130 and 140. In addition, the discharge port 147 is formed on the outer surface of the cylinder block 140 and communicates with the discharge chambers 111 and 121 of the front and rear housings 110 and 120 through the discharge passage 134 and 144. Done.

In addition, an oil passage 155 is formed on the outer circumferential surface of the drive shaft 150 to communicate with the flow passage 151.

Therefore, the suction refrigerant supplied through the suction port 146 is sucked into the cylinder bores 131 and 141 directly through the flow path 151 of the drive shaft 150 through the inside of the rear housing 120. The subsequent action is the same as described above, and the oil circulation process is the same.

As described above, the present invention is a cylinder bore through the flow path 151 of the drive shaft 150 by forming a flow path 151 inside the hollow drive shaft 150 to the refrigerant sucked into the swash plate chamber 136. Regardless of the type of moving to 131 and 141 or the type of refrigerant directly moving the cylinder bores 131 and 141 through the flow path 151 inside the driving shaft 150 from the rear of the driving shaft 150. The oil passage 155 is formed on the 150 to allow the oil separated from the refrigerant to circulate inside the drive shaft seal region 115 and the swash plate chamber 136 so that the oil remains in the compressor 100. As well as the capacitive swash plate compressor 100, it can be applied to various kinds of compressors such as electric compressors in the same method and configuration, and the same effect can be obtained.

According to the present invention, in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft to move the oil separated in the drive shaft to the drive shaft seal area of the front housing to help lubrication and return the oil back to the swash chamber By lubricating the drive unit, the oil remains in the compressor, thereby improving the performance of the compressor, and the circulation of oil is reduced by the heat exchanger outside the compressor, thereby improving the overall performance of the heat exchanger as well as the air conditioner. The heat exchanger can be made more compact and the amount of oil injected into the air conditioner can be reduced.

Claims (6)

The swash plate 160 rotating in the swash plate chamber 136 inside the compressor 100 is inclinedly coupled therein, and the flow path allows the refrigerant sucked into the compressor 100 from the outside to move to the cylinder bores 131 and 141. A drive shaft 150 on which 151 is formed; 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 is configured to include a valve unit 180 interposed between the cylinder block 130, 140 and the front, rear housing 110, 120, respectively, An oil passage 155 is formed in the drive shaft 150 to communicate the flow path 151 and the drive shaft seal area 115 of the front housing 110, and the discharge chamber has a discharge chamber in the front housing 110. And an oil chamber 117 which is partitioned from the 111 and communicates with the drive shaft seal area 115 and the bolt hole 138 of the cylinder block 130. After supplying the oil separated from the refrigerant in the flow path 151 of the drive shaft 150 to the drive shaft seal area 115 through the oil passage 155, the oil is again supplied to the oil chamber 117 and the cylinder block ( Compressor to return to the swash plate chamber 136 through the bolt hole (138) of 130 to form an oil circulation flow path. The method of claim 1, The inlet 152 of the flow path 151 is formed to communicate with the swash plate chamber 136, the outlet 153 is formed to communicate with the suction passages 132, 142 of the cylinder block 130, 140. Compressor, characterized in that. The method of claim 2, The inlet 152 of the flow path 151 is formed through the hub 161 and the drive shaft 150 of the swash plate 160, characterized in that formed through. 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). The method of claim 1, An outer surface of the cylinder block 140 has a suction port 146 in communication with the swash plate chamber 136 to supply an external refrigerant to the swash plate chamber 136, and the front and rear housings 110 and 120 And a discharge port (147) communicating with the discharge chamber (111) (121) so as to discharge the refrigerant in the discharge chamber (111) (121) to the outside. The method of claim 5, Discharge chambers 111 and 121 of the front and rear housings 110 and 120 are discharged on the outer surfaces of the cylinder blocks 130 and 140 to reduce noise by reducing the pulsation pressure of the discharge refrigerant. Compressor characterized in that the muffler (135) (145) extending the discharge passage (134, 144) connecting the port (147) is formed.

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