KR101042397B1 - swash plate type compressor having refrigerants moving parts - Google Patents

Abstract

The present invention not only efficiently sucks the refrigerant remaining in the swash plate chamber, but also has a refrigerant moving part capable of greatly improving the volumetric efficiency by bypassing the high pressure refrigerant remaining after the compression stroke of the piston to the suction cylinder cylinder. A swash plate compressor, comprising: a cylinder block having a plurality of cylinder bores, a piston accommodated reciprocally in a cylinder bore of the cylinder block, a housing coupled to the cylinder block, and the housing and the cylinder block. A swash plate type compressor comprising: a drive shaft rotatably mounted with respect to the drive shaft; And a shoe interposed between the swash plate and the piston as the swash plate rotates. Since the first refrigerant moving part having a structure in communication with each other is formed so that the refrigerant remaining in the swash plate can be moved to the cylinder bore for starting the suction stroke, the refrigerant remaining in the swash plate can be supplied to the suction cylinder bore. This can greatly improve the suction amount of the compressor has the effect of improving the performance of the compressor.

Refrigerant moving part, swash plate compressor, residual gas, bypass

Description

Swash plate type compressor having refrigerant moving parts

The present invention relates to a swash plate type compressor provided with a refrigerant moving unit. In particular, the swash plate compressor not only efficiently sucks the refrigerant remaining in the swash plate chamber but also bypasses the high pressure refrigerant remaining after the compression stroke of the piston to the suction cylinder cylinder. It relates to a swash plate compressor having a refrigerant moving unit that can greatly improve the volumetric efficiency.

In general, a vehicle air conditioner is a device that maintains a temperature inside a car lower than an external temperature by using a refrigerant, and includes a compressor, a condenser, and an evaporator to configure a circulation cycle of the refrigerant.

The compressor is a device that compresses and pumps refrigerant, and is driven by engine power or a motor.

In the swash plate type compressor, which is a kind of reciprocating compressor, a disc shaped swash plate is installed on a drive shaft to which engine power is transmitted in a state in which the inclination angle is variable or fixed to the rotation of the drive shaft, and the circumference of the swash plate is rotated by the rotation of the swash plate. A plurality of pistons installed through a shoe along the structure is configured to suck, compress and discharge the refrigerant gas by linearly reciprocating the inside of the plurality of cylinder bores formed in the cylinder block.

In addition, in the process of inhaling, compressing, and discharging the refrigerant gas, a valve plate is disposed between the housing and the cylinder block to control the suction and discharge of the refrigerant gas.

Specifically, with reference to Figure 1 will be described in more detail the configuration of a conventional swash plate compressor.

As shown, the front housing 10 is built in the front cylinder block 20, the rear housing 10a is coupled to the front housing 10, the rear cylinder block 20a is built, and the front and rear A plurality of pistons 50 each reciprocating in the plurality of cylinder bores 21 formed in the cylinder block 20, 20a and the shoe 45 is inclinedly coupled to the drive shaft 30 and installed on the outer circumference Valve plate 60 is installed between the swash plate 40 and the front and rear housings 10 and 10a and the front and rear cylinder blocks 20 and 20a via the swash plate 40. And a refrigerant provided from the evaporator during the suction stroke of the piston 50 to the inside of the compressor 1 and the compressor 1 during the compression stroke of the piston 50. A suction port and a discharge port (not shown) are molded to discharge the refrigerant compressed therein toward the condenser.

However, in the swash plate compressor according to the prior art, when the piston reaches the top dead center where the compression is completed, most of the compressed high-pressure refrigerant is discharged into each refrigerant discharge chamber of the front and rear housings, but some refrigerant is trapped in the cylinder bore. . At this time, since the refrigerant remaining in the cylinder bore is in a high pressure state, there is a problem of generating a suction obstacle by preventing the suction of the refrigerant (low pressure state) flowing into the cylinder bore in order to proceed with the suction stroke.

As a result, the refrigerant to be introduced into the cylinder bore has a problem in that the suction reaction rate is slow due to the high-pressure refrigerant remaining therein, so that the refrigerant cannot be quickly supplied into the cylinder bore.

The present invention has been made to solve the above problems, an object of the present invention is to supply a refrigerant remaining in the swash plate chamber back to the cylinder bore swash plate compressor having a refrigerant moving unit that can secure a stable suction amount of the refrigerant To provide.

Another object of the present invention is to reduce the suction resistance of the refrigerant by bypassing the residual high pressure refrigerant trapped in the cylinder bore during the compression stroke of the piston and to discharge the bypassed refrigerant to the suction cylinder cylinder bore of the compressor according to the refrigerant suction amount. It is to provide a swash plate compressor having a refrigerant moving unit that can further improve the volumetric efficiency.

In order to achieve the above object, the swash plate compressor having a refrigerant moving unit according to the present invention is a cylinder block having a plurality of cylinder bores, a piston which is accommodated in the cylinder bore of the cylinder block so as to reciprocate, respectively, the cylinder In the swash plate type compressor comprising a housing coupled to the block, a drive shaft rotatably installed with respect to the housing and the cylinder block, and a swash plate coupled to the drive shaft inclined and interlocked with the piston via a shoe.

At least one surface of both sides of the swash plate, the piston connected to the swash plate and the shoe interposed between the swash plate and the piston, the refrigerant remaining in the swash plate chamber can be moved to the cylinder bore to start the suction stroke as the swash plate rotates. It characterized in that the first refrigerant moving part of the structure so as to communicate with each other is formed.

In addition, a swash plate type compressor having a refrigerant moving unit according to the present invention includes a cylinder block having a plurality of cylinder bores, a piston accommodated reciprocally in the cylinder bore of the cylinder block, and a housing coupled to the cylinder block. In the swash plate type compressor comprising a drive shaft rotatably installed with respect to the housing and the cylinder block, and a swash plate coupled to the drive shaft inclined and interlocked with the piston via a shoe,

The swash plate, the piston connected to the swash plate and the shoe interposed between the swash plate and the piston, the structure is in communication with each other to move the refrigerant remaining in one cylinder bore to the opposite cylinder bore relative to the swash plate as the swash plate rotates The second refrigerant moving portion is characterized in that formed.

In addition, a swash plate compressor having a refrigerant moving unit according to the present invention includes a cylinder block having a plurality of cylinder bores, a piston accommodated in the cylinder bore of the cylinder block so as to reciprocate, and a housing coupled to the cylinder block; In the swash plate type compressor comprising a drive shaft rotatably installed with respect to the housing and the cylinder block, and a swash plate coupled to the drive shaft inclined and interlocked with the piston via a shoe,

At least one surface of both sides of the swash plate, the piston connected to the swash plate and the shoe interposed between the swash plate and the piston, the refrigerant remaining in the swash plate chamber can be moved to the cylinder bore to start the suction stroke as the swash plate rotates. A first refrigerant moving unit having a structure in communication with each other,

The swash plate, the piston connected to the swash plate and the shoe interposed between the swash plate and the piston, the structure is in communication with each other to move the refrigerant remaining in one cylinder bore to the opposite cylinder bore relative to the swash plate as the swash plate rotates The second refrigerant moving portion is characterized in that formed.

Here, the first refrigerant moving portion is formed through the first suction passage formed on the surface of the swash plate, the second suction passage formed through the inside of the shoe, and the second suction passage and the cylinder bore inside the piston. Characterized in that consisting of a third suction tube.

In addition, the first suction passage is characterized in that it is formed extending from the start point of starting suction to the end point of the piston.

Particularly, when the swash plate is viewed from the direction of the drive shaft, the first suction passage is a groove formed in an arc shape.

The first suction passages are formed on both sides of the swash plate, and the two first suction passages are symmetrically formed with respect to the drive shaft.

On the other hand, the second refrigerant moving portion is formed through the flow passage penetrating the front and rear surfaces of the swash plate, the second suction passage formed through the inside of the shoe, and the second suction passage and the cylinder bore inside the piston It is characterized by consisting of a third suction cylinder.

Here, the flow passage is formed on the surface in contact with the shoe when looking at the swash plate in the direction of the drive shaft, characterized in that formed on the point immediately after the swash plate passes the top dead center of the piston.

In addition, the flow passage is characterized in that formed in each of the two facing, when looking at the swash plate in the direction of the drive shaft.

The intermediate surface of the refrigerant is formed on the inner surface of the piston in contact with the convex surface of the shoe.

According to the present invention having the above-described configuration, by forming the refrigerant moving portion for communicating the swash plate, the piston and the shoe with each other, the refrigerant remaining in the swash plate chamber can be supplied to the suction side cylinder bore to greatly improve the suction amount of the refrigerant It can be an effect that can improve the performance of the compressor.

In addition, according to the present invention, since the refrigerant moving unit can bypass the high pressure refrigerant remaining after the compression stroke of the piston to the suction cylinder bore, the refrigerant supplied back into the cylinder bore after the compression stroke without suction obstacle The inside of the compressor can be moved smoothly, further improving the volumetric efficiency of the compressor.

Hereinafter, exemplary embodiments 1, 2 and 3 of the present invention will be described in detail with reference to the accompanying drawings.

Prior to the description, the swash plate compressor 1000 having the refrigerant moving unit according to the present invention has been applied to the compressor constituting the valve plate, but is not necessarily limited to the configuration having the valve plate, the refrigerant is a cylinder bore through the rotary valve It can also be applied to a swash plate compressor using a conventional rotary valve to directly enter the.

≪ Example 1 >

2 to 4, the swash plate compressor 1000 according to the present invention includes a cylinder block 100 having a plurality of cylinder bores 110 and a cylinder bore 110 of the cylinder block 100. Piston 200 which is accommodated in the reciprocating motion respectively, the front and rear housings 310 and 320 to be hermetically coupled to the front and rear of the cylinder block 100, respectively, the front housing 310 and the cylinder block ( A drive shaft 400 rotatably installed with respect to 100, a swash plate 500 that is inclinedly coupled to the drive shaft 400 and interlocked with the piston 200 via a shoe 510 on an outer circumference thereof, and the cylinder It consists of a valve plate 600 interposed between the block 100 and the front and rear housings 310 and 320, respectively.

Since the configuration is the same as or similar to the prior art of FIG. 1 and FIG. 2 described above, description of the overlapping configuration will be omitted, and only the differences will be described.

First, the cylinder block 100 is interposed between the front and rear housings 310 and 320, the swash plate chamber 101 and the swash plate 500 to drive the drive shaft 400 and the swash plate 500 therein. A plurality of cylinder bores 110 are formed to allow the piston 200 connected to the reciprocating motion to compress the refrigerant.

Specifically, the swash plate 500 is coupled to the drive shaft 400 inside the cylinder block 100. The piston 200 is installed on both sides of the outer circumference of the swash plate 500 via a plurality of shoes 510 around the drive shaft 400, and the shoe 510 and the swash plate 500 slide. This is possibly combined.

In particular, as illustrated in FIGS. 3 to 5, a swash plate 500 coupled to the drive shaft 400, a piston 200 connected to the swash plate 500, and interposed between the swash plate 500 and the piston 200. The shoe 510 is provided with a first refrigerant moving part 700 for moving the refrigerant remaining in the swash plate chamber 101 to the cylinder bore 110 to start the suction stroke.

The first refrigerant moving part 700 is a first suction passage 710 formed on the front and rear surfaces of the swash plate 500, the second suction passage 730 formed in the shoe 510, and It consists of a third suction passage 740 formed inside the piston (200).

The first suction passage 710 preferably has an arc-shaped groove along the circumference of the swash plate.

The first refrigerant moving part 700 is the swash plate chamber 101 in the process of supplying the refrigerant back into the cylinder bore 110 after the piston 200 repeatedly performing a compression action on the refrigerant reaches a top dead center. By allowing the refrigerant remaining in the) to be supplied together, the volumetric efficiency of the compressor can be further improved by increasing the refrigerant suction amount.

Here, the first suction passage 710 is formed on the front and rear surfaces of the swash plate, respectively, when looking at the swash plate 500 in the direction of the drive shaft, each shoe 510 from the time when the suction process starts to end time It extends on the passing path.

Accordingly, as shown in FIG. 5, two first suction passages 710 formed on the front and rear surfaces of the swash plate 500 are symmetrically formed with respect to the drive shaft 400.

In addition, one end of the second suction passage 730 is formed in communication with the first suction passage 710.

In addition, a coolant intermediate storage space 270 is formed on an inner surface of the piston 200 in contact with the convex surface of the shoe 510 to smoothly flow the coolant between the suction passages 730 and 740.

Hereinafter, the operation of the swash plate compressor 1000 having the refrigerant moving unit according to the present invention will be described.

First, as shown in FIG. 3, in the state in which the left cylinder bore 110 of the drawing is completely compressed, when the driving shaft 400 rotates in the direction of the arrow, suction of the refrigerant is made.

At this time, since the cylinder bore 110 and the swash plate chamber 101 communicate with each other by the first suction cylinder 710, residual refrigerant existing in the swash plate chamber 101 is formed in the swash plate 500 due to the pressure difference. It moves to the cylinder bore 110 in which the refrigerant is sucked through the first suction tube 710.

In this case, the residual refrigerant moves along the path of the third suction passage 740 formed in the piston 200 via the second suction passage 730 which is in contact with the first suction passage 710. .

As such, the swash plate compressor 1000 having the first refrigerant moving unit according to the first exemplary embodiment of the present invention includes a cylinder bore 110 that moves to a bottom dead center immediately after the piston 200 that compresses the refrigerant reaches a top dead center. By supplying the refrigerant remaining in the swash plate chamber 101 to the inside thereof, the suction amount can be greatly increased to improve the performance of the compressor.

In the drawings, the embodiment of the present invention is directed to a double head swash plate compressor, of course, can also be applied to a double head swash plate compressor.

<Example 2>

2 and 6 to 8, the swash plate compressor 1000 according to the present invention is a cylinder block 100 having a plurality of cylinder bores 110, and the cylinder bore of the cylinder block 100 Piston 200 which is accommodated in the reciprocating motion (110), respectively, the front and rear housings (310,320) and the front housing (310) which are hermetically coupled to the front and rear of the cylinder block 100, respectively; A drive shaft 400 rotatably installed with respect to the cylinder block 100, a swash plate 500 that is inclinedly coupled to the drive shaft 400 and interlocked with the piston 200 via a shoe 510 at an outer circumference thereof; The valve block 600 is interposed between the cylinder block 100 and the front and rear housings 310 and 320, respectively.

Since the above configuration is the same as or similar to the prior art and the first embodiment of the present invention of FIG. 1, the description of the overlapping configuration will be omitted and only the differences will be described.

In particular, as illustrated in FIGS. 6 to 8, a swash plate 500 coupled to the drive shaft 400, a piston 200 connected to the swash plate 500, and interposed between the swash plate 500 and the piston 200. The shoe 510 bypasses the high-pressure residual refrigerant that is not discharged after the compression stroke of the piston 200 reaches the top dead center to the cylinder bore 110 that performs the refrigerant suction action on the opposite side of the swash plate 500. The second refrigerant moving unit 700A is formed.

Here, the second refrigerant moving part 700A includes a flow passage 720 penetrating the front and rear surfaces of the swash plate 500, a second suction passage 730 formed in the shoe 510, and the piston. It consists of a third suction passage 740 formed in the interior of the (200).

The second refrigerant moving part (700A) at the time of performing the opposite suction stroke of the high-pressure refrigerant remaining in the cylinder bore 110 without being discharged even after the compression stroke of the piston 200 reaches the top dead center. Supply to the cylinder bore 110 to further improve the compression efficiency.

Furthermore, when the refrigerant in the high pressure state is supplied to the cylinder bore 110 to start compression, the pressure inside thereof can be greatly increased, so the compression efficiency is improved.

In addition, by bypassing the high-pressure refrigerant that was not discharged by the compression stroke of the piston 200, the speed of the suction reaction of the refrigerant sucked through the valve plate 600 to increase the amount of refrigerant intake can greatly increase have.

Here, the flow passage 720 is formed on the surface in communication with the second suction passage 730 of the shoe 510 when looking at the swash plate 500 in the drive shaft direction, the top dead center of the piston 200 It is formed at the point immediately after it passes.

As shown in FIG. 8, the flow passage 720 may be formed at two places where the swash plate 500 moves the piston 200 to the top dead center.

Hereinafter, the operation of the swash plate compressor 1000 having the refrigerant moving unit according to the present invention will be described.

First, when the piston 200 reaches the top dead center during the compression stroke after the refrigerant flows into the cylinder bore 110, most of the compressed high-pressure refrigerant is discharged through the valve plate 600. Some refrigerant remains trapped in the cylinder bore 110.

At this time, the refrigerant remaining in the high pressure state in the cylinder bore 110 flows into the third suction passage 740 formed in the piston 200 and the refrigerant moved along the passage is formed on the shoe 510 again. 2 is moved to the suction passage (730).

Next, immediately after the swash plate 500 passes through the top dead center of the piston 200, the flow passage 720 and the second suction passage 730 formed in the swash plate 500 communicate with each other, thereby allowing the second suction passage 730 to communicate with each other. Refrigerant that has been moved in the inside of the swash plate 500 passes through the flow path 720 is discharged into the cylinder bore 110 to start the compression action through the shoe 510 and the piston 200 of the opposite side.

Therefore, the compressor may greatly improve volumetric efficiency by bypassing the refrigerant remaining in the cylinder bore 110 to the cylinder bore 110 on the opposite side with respect to the swash plate 500.

<Example 3>

2 and 9, the swash plate compressor 1000 according to the present invention includes a cylinder block 100 having a plurality of cylinder bores 110 and a cylinder bore 110 of the cylinder block 100. Piston 200 which is accommodated in the reciprocating motion respectively, the front and rear housings 310 and 320 to be hermetically coupled to the front and rear of the cylinder block 100, respectively, the front housing 310 and the cylinder block ( A drive shaft 400 rotatably installed with respect to 100, a swash plate 500 that is inclinedly coupled to the drive shaft 400 and interlocked with the piston 200 via a shoe 510 on an outer circumference thereof, and the cylinder It consists of a valve plate 600 interposed between the block 100 and the front and rear housings 310 and 320, respectively.

Since the configuration is the same as or similar to the prior art and the first embodiment and the second embodiment of the present invention described above, the description of the overlapping configuration will be omitted, and only the different configurations will be described.

In particular, as illustrated in FIG. 9, a swash plate 500 coupled to the drive shaft 400, a piston 200 connected to the swash plate 500, and a shoe interposed between the swash plate 500 and the piston 200. 510 has a first refrigerant moving unit 700 for moving the refrigerant remaining in the swash plate chamber 101 to the cylinder bore 110 to start the suction stroke, and the compression stroke of the piston 200 at the top dead center. After reaching, the second refrigerant moving part 700B for bypassing the high-pressure residual refrigerant that is not discharged to the cylinder bore 110 for performing the refrigerant suction on the opposite side is formed together.

In this case, the front and rear surfaces of the swash plate 500, respectively, the first suction passage 710 and the flow passage 720 which is located near the end of the first suction passage 710 and penetrates the front and rear surfaces of the swash plate 500. And a second suction passage 730 formed in the shoe 510 and a third suction passage 740 formed in the piston 200.

Accordingly, the compressor according to the third embodiment of the present invention has the effects according to the first and second embodiments at the same time, thereby greatly improving the performance of the compressor.

Other configurations and operation descriptions are the same as or similar to the configuration and operation descriptions of the above-described Embodiments 1 and 2, and thus detailed descriptions thereof will be omitted.

1 is a cross-sectional view showing the configuration of a swash plate compressor according to the prior art.

2 is a cross-sectional view showing the configuration of a swash plate compressor having a refrigerant moving unit of the present invention.

3 is a perspective view showing a swash plate compressor having a moving unit according to Embodiment 1 of the present invention.

4 is a cross-sectional view of FIG. 3.

5 is a side view of the swash plate of FIG. 3 as viewed in the direction of the drive shaft.

6 is a perspective view showing a swash plate compressor having a moving unit according to Embodiment 2 of the present invention.

7 is a cross-sectional view of FIG. 6.

FIG. 8 is a side view of the swash plate of FIG. 7 as viewed in the direction of the drive shaft. FIG.

9 is a perspective view showing a swash plate compressor having a moving unit according to Embodiment 3 of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: cylinder block

110: cylinder bore

200: piston

270: intermediate storage space of refrigerant

400: drive shaft

500: swash plate

510: shoe

700: first refrigerant moving unit

700A: second refrigerant moving unit

710: first suction passage

720: flow path

730: second suction passage

740: third suction passage

Claims (11)

A cylinder block having a plurality of cylinder bores, a piston reciprocally received in the cylinder bore of the cylinder block, a housing coupled to the cylinder block, and a drive shaft rotatably installed relative to the housing and the cylinder block; In the swash plate type compressor comprising a swash plate coupled to the drive shaft inclined and interlocked with the piston via a shoe, At least one of both sides of the swash plate, the piston connected to the swash plate and the shoe interposed between the swash plate and the piston, the refrigerant remaining in the swash plate chamber can be moved to the cylinder bore to start the suction stroke as the swash plate rotates. A swash plate type compressor having a refrigerant moving unit, characterized in that the first refrigerant moving unit having a structure in communication with each other is formed. A cylinder block having a plurality of cylinder bores, a piston reciprocally received in the cylinder bore of the cylinder block, a housing coupled to the cylinder block, and a drive shaft rotatably installed relative to the housing and the cylinder block; In the swash plate type compressor comprising a swash plate coupled to the drive shaft inclined and interlocked with the piston via a shoe, The swash plate, the piston connected to the swash plate and the shoe interposed between the swash plate and the piston, the structure is in communication with each other to move the refrigerant remaining in one cylinder bore to the opposite cylinder bore relative to the swash plate as the swash plate rotates A swash plate compressor having a refrigerant moving part, characterized in that the second refrigerant moving part is formed. A cylinder block having a plurality of cylinder bores, a piston reciprocally received in the cylinder bore of the cylinder block, a housing coupled to the cylinder block, and a drive shaft rotatably installed relative to the housing and the cylinder block; In the swash plate type compressor comprising a swash plate coupled to the drive shaft inclined and interlocked with the piston via a shoe, At least one of both sides of the swash plate, the piston connected to the swash plate and the shoe interposed between the swash plate and the piston, the refrigerant remaining in the swash plate chamber can be moved to the cylinder bore to start the suction stroke as the swash plate rotates. A first refrigerant moving unit having a structure in communication with each other, The swash plate, the piston connected to the swash plate and the shoe interposed between the swash plate and the piston, the structure is in communication with each other to move the refrigerant remaining in one cylinder bore to the opposite cylinder bore relative to the swash plate as the swash plate rotates A swash plate compressor having a refrigerant moving part, characterized in that the second refrigerant moving part is formed. The method according to claim 1 or 3, The first refrigerant moving part is formed through the first suction passage formed on the surface of the swash plate, the second suction passage formed through the inside of the shoe, and the second suction passage and the cylinder bore inside the piston. A swash plate compressor having a refrigerant moving part, comprising: a suction cylinder. 5. The method of claim 4, The first suction passage is a swash plate compressor having a refrigerant moving unit, characterized in that extending from the start point of suction to the end point of the piston. The method of claim 5, When the swash plate is viewed from the direction of the drive shaft, the first suction passage is a swash plate compressor having a refrigerant moving unit, characterized in that the groove formed in an arc shape. The method according to any one of claims 1 to 3, A first suction passage is formed on both sides of the swash plate, and the two first suction passages are formed symmetrically with respect to the drive shaft. The method according to claim 2 or 3, The second refrigerant moving part is formed through the flow passage penetrating the front and rear surfaces of the swash plate, the second suction passage formed through the inside of the shoe, and the second suction passage and the cylinder bore inside the piston. A swash plate compressor having a refrigerant moving unit, comprising a suction tube. The method of claim 8, And the flow passage is formed on a surface in contact with the shoe when the swash plate is viewed from the direction of the drive shaft, and is formed at a point immediately after the swash plate passes through the top dead center of the piston. 10. The method of claim 9, The flow passage is a swash plate compressor having a refrigerant moving unit, characterized in that formed in each of the two facing when the swash plate in the direction of the drive shaft. The method according to any one of claims 1 to 3, The internal plate of the piston in contact with the convex surface of the shoe swash plate compressor having a refrigerant moving unit characterized in that the intermediate storage space is formed.

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