KR101032196B1 - compressor - Google Patents

Abstract

The present invention relates to a compressor, wherein a swash plate rotating in a swash chamber inside the compressor is inclinedly coupled therein, and a flow path is formed therein so that refrigerant sucked into the compressor from the outside can move to a cylinder bore, and the swash chamber and A drive shaft having at least one inlet communicated with each other and having a pair of outlets at opposite positions to both sides of the inlet in the axial direction; The drive shaft is rotatably installed in the shaft support hole and a plurality of cylinder bores are formed at both sides of the swash plate chamber, and the shaft sucked into the cylinder bore sequentially during the rotation of the drive shaft. A front and rear 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 front and rear cylinder blocks and having discharge chambers formed therein; A compressor comprising a valve unit interposed between the front and rear cylinder blocks and the front and rear housings, the swash plate comprising: a first swash plate having a disc shape; A plurality of swash plate protrusions that are correspondingly coupled to one side of the first swash plate plate, the radially arranged so as to form a plurality of suction passages in communication with the inlet 32 while having a curved shape along the rotation direction of the swash plate It is formed, and characterized in that it comprises a second swash plate of the disk type opposed to the first swash plate.

According to the compressor according to the present invention, in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft, the swash plate is manufactured in a separate type, and when the swash plate is combined to form a plurality of suction passages curved in the swash plate rotation direction to the inside of the swash plate. By forming the refrigerant intake smoothly through the curved path, there is an effect of reducing the refrigerant suction resistance sucked into the drive shaft and increasing the refrigerant suction to improve the refrigerant efficiency.

Swash plate, first swash plate, second swash plate, swash plate protrusion, inlet, outlet.

Description

Compressor

1 is a cross-sectional view showing a fixed displacement compressor according to the prior art.

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

3 is a cross-sectional view showing a compressor according to the present invention.

4 is a perspective view showing a state in which the swash plate according to the present invention is separated.

5 is a front view showing a state in which the swash plate and the drive shaft is coupled according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10: compressor, 11, 11a: front and rear housing,

12: discharge chamber, 20, 20a: cylinder block,

21: cylinder bore, 22: suction passage,

24: slate chamber, 25: shaft supporter,

30: drive shaft, 31: flow path,

40: swash plate, 40a: first swash plate,

40b: second swash plate, 40c: swash plate protrusion,

41: hub, 42: suction passage,

50: piston,

60: valve unit, 70: muffler.

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, the swash plate is manufactured in a separate type, and a plurality of suction passages curved in the rotational direction of the swash plate when the swash plates are coupled to each other. The present invention relates to a compressor which is formed to smoothly suck refrigerant through an inlet path inside the swash plate, thereby reducing refrigerant suction resistance sucked into the drive shaft and increasing refrigerant suction to improve refrigerant efficiency.

In general, a compressor used in an automobile air conditioner has a function of sucking the vaporized heat exchange medium in the evaporator, compressing the sucked heat exchange medium, and pumping the compressed heat exchange medium to continuously circulate the refrigerant. To make it possible.

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 type compressor compressed by two scroll rotary motions, and a rotary type 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 and wobble plate type, in addition to the swash plate compressor. Type compressors and the like.

1 and 2 illustrate a conventional fixed displacement swash plate type compressor 100, a front housing 110 in which a front cylinder block 120 is incorporated, and a rear cylinder block coupled to the front housing 110. It comprises a rear housing (110a) is built in (120a).

Inside the front and rear housings 110 and 110a, the discharge chamber 112 and the suction chamber, respectively, inside and outside the partition 113 in correspondence with the refrigerant discharge hole and the refrigerant suction hole of the valve plate 161 to be described below. 111 is formed.

Here, the discharge chamber 112 is formed in the first discharge chamber (112a) formed inside the partition wall 113, the outer side of the partition wall 113 is partitioned from the suction chamber 111 and the first discharge chamber (112a) ) And a second discharge chamber 112b communicating through the discharge hole 112c. That is, when the refrigerant in the first discharge chamber 112a passes through the discharge hole 112c having the small diameter, the refrigerant is reduced and enlarged when moving to the second discharge chamber 112b. The pulsation pressure drops to reduce vibration and noise.

On the other hand, a plurality of bolted fastening holes 116 are formed in the circumferential direction of the suction chamber 111. Through the bolt fastening hole 116, the front and rear housings 110 and 110a are fastened and fixed to the mutual bolt 180 in a state where a plurality of components are assembled therein.

In addition, the front and rear cylinder blocks 120 and 120a are provided with a plurality of cylinder bores 121 therein, and the piston bores 121 corresponding to each other of the front and rear cylinder blocks 120 and 120a are provided with a piston ( In addition to 150 being coupled to reciprocate linearly, the piston 150 is coupled via the shoe 145 on the outer periphery of the swash plate 140 inclined to the drive shaft 130.

Accordingly, the piston 150 reciprocates inside the cylinder bore 121 of the front and rear cylinder blocks 120 and 120a in conjunction with the swash plate 140 that rotates together with the drive shaft 130.

The valve unit 160 is installed between the front and rear housings 110 and 110a and the front and rear cylinder blocks 120 and 120a. Here, the valve unit 160 is composed of a valve plate 161 having a refrigerant suction hole and a refrigerant discharge hole, and a suction lead valve 163 and a discharge lead valve 162 installed at both sides thereof.

The valve unit 160 is assembled between the front and rear housings 110 and 110a and the front and rear cylinder blocks 120 and 120a, respectively, in which fixing pins 165 are formed on both sides of the valve plate 161. ) Is assembled in a fixed position while being inserted into the fixing holes 115 formed on the opposite surfaces of the front and rear housings 110 and 110a and the front and rear cylinder blocks 120 and 120a.

On the other hand, the front and rear cylinder blocks (120, 120a) so that the refrigerant supplied to the swash plate chamber 124 provided between the front and rear cylinder blocks (120, 120a) can flow to each of the suction chamber (111). A plurality of suction passages 122 are formed therein, and the second discharge chamber 112b of the front and rear housings 110 and 110a passes through the front and rear cylinder blocks 120 and 120a. ) Are communicated with each other.

Therefore, the suction and compression of the refrigerant may be simultaneously performed in the cylinder bores 121 of the front and rear cylinder blocks 120 and 120a according to the reciprocating motion of the piston 150.

In addition, a shaft support hole 125 is formed at the center of the front and rear cylinder blocks 120 and 120a to support the driving shaft 130, and a needle roller bearing 126 is interposed in the shaft support hole 125. Thus, the drive shaft 130 is rotatably supported.

On the other hand, the upper portion of the outer side of the rear housing 110a supplies the refrigerant transferred from the evaporator during the suction stroke of the piston 150 into the compressor 100, and during the compression stroke of the piston 150 inside the compressor 100 The muffler 170 is formed to discharge the compressed refrigerant in the condenser.

Referring to the refrigerant circulation process of the compressor 100 configured as described above are as follows.

The refrigerant supplied from the evaporator is sucked into the suction part of the muffler 170 and then supplied to the swash plate chamber 124 between the front and rear cylinder blocks 120 and 120a through the refrigerant suction port 171, and the swash plate chamber The refrigerant supplied to 124 flows into the suction chamber 111 of the front and rear housings 110 and 110a along the suction passages 122 formed in the front and rear cylinder blocks 120 and 120a.

Thereafter, the suction lead valve 163 is opened during the suction stroke of the piston 150, wherein the refrigerant in the suction chamber 111 passes through the refrigerant suction hole in the valve plate 161. Is sucked into the interior. In addition, during the compression stroke of the piston 150, the refrigerant inside the cylinder bore 121 is compressed. In this case, the discharge lead valve 162 is opened and the refrigerant is discharged through the refrigerant discharge hole of the valve plate 161. The first discharge chamber 112a of the rear housings 110 and 110a flows. Subsequently, the refrigerant flowing into the first discharge chamber 112a is discharged to the discharge portion of the muffler 170 through the refrigerant discharge port 172 of the muffler 170 via the second discharge chamber 112b and then to a condenser. It will be fluid.

In addition, the refrigerant compressed in the cylinder bore 121 of the front cylinder block 120 is discharged to the first discharge chamber 112a of the front housing 110, and then flows to the second discharge chamber 112b. After flowing along the connecting passage 123 formed in the front and rear cylinder blocks (120, 120a) to the second discharge chamber (112b) of the rear housing (110a) and the refrigerant discharge port 172 together with the refrigerant therein. Through the discharge portion of the muffler 170 is discharged.

The conventional compressor 100 has a loss of refrigerant due to a loss of suction resistance caused by a complicated refrigerant flow path and loss due to elastic resistance of the suction lead valve 163 during the opening and closing operation of the valve unit 160. There was a problem that the suction volume efficiency is reduced.

On the other hand, a technique for reducing the loss caused by the elastic resistance of the suction lead valve is disclosed in Korean Patent Publication No. 2003-47729 (name: lubrication structure in a fixed displacement piston compressor). That is, the above technique applies a drive shaft integrated rotary suction valve without a suction lead valve and allows the refrigerant to directly enter the cylinder bore from the rear of the drive shaft through the inside of the drive 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 part inside the compressor to circulate the air conditioning system.

However, the above-described conventional techniques have not been able to secure the refrigerant suction passage sufficiently due to the enormous constraint in processing and increasing the size of the refrigerant suction passage behind the drive shaft, thereby increasing the refrigerant suction resistance.

In order to solve this problem, the applicant of the present invention has applied for a compressor that can allow the refrigerant supplied to the swash plate chamber to be directly sucked into the cylinder bore through the hollow drive shaft in accordance with the patent application No. 2005-74185.

According to the compressor having such a structure, by forming a flow path inside the drive shaft and allowing the refrigerant supplied to the swash chamber to be directly sucked into the cylinder bore through the flow path as the drive shaft rotates, thereby providing uniform refrigerant to each cylinder bore on both sides of the swash chamber. As well as the distribution is made, the flow of the refrigerant to the drive unit, such as the swash plate and the drive shaft in the swash plate chamber can be increased to improve the lubrication performance by the oil.

However, since the inlet formed in the hub of the swash plate, which is a rotating body, is formed perpendicular to the drive shaft, the suction resistance of the refrigerant sucked into the inside of the drive shaft is increased while the refrigerant is not sucked smoothly, thereby reducing the refrigerant efficiency. There was a problem.

The present invention has been made in order to solve the above problems, in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft to make the swash plate in a separate type, forming a plurality of inlet curved in the rotational direction of the swash plate refrigerant It is an object of the present invention to reduce the suction resistance of the refrigerant sucked into the drive shaft and to increase the refrigerant suction, thereby improving the refrigerant efficiency.

According to the compressor according to the present invention devised to achieve the object as described above, the swash plate rotating in the swash plate chamber inside the compressor is inclined, so that the refrigerant sucked into the compressor from the outside to move into the cylinder bore A drive shaft having a flow path formed therein, the drive shaft being formed with at least one inlet communicating with the swash plate chamber, and having a pair of outlets at opposite positions to both sides of the inlet and the axial direction; The drive shaft is rotatably installed in the shaft support hole and a plurality of cylinder bores are formed at both sides of the swash plate chamber, and the shaft sucked into the cylinder bore sequentially during the rotation of the drive shaft. A front and rear 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 front and rear cylinder blocks and having discharge chambers formed therein; A compressor comprising a valve unit interposed between the front and rear cylinder blocks and the front and rear housings, the swash plate comprising: a first swash plate having a disc shape; A plurality of swash plate protrusions that are correspondingly coupled to one side of the first swash plate plate, the radially arranged so as to form a plurality of suction passages in communication with the inlet 32 while having a curved shape along the rotation direction of the swash plate It is formed, and characterized in that it comprises a second swash plate of the disk type opposed to the first swash plate.

In addition, the swash plate protrusion is preferably formed such that the width of the suction passage narrows toward the center of the swash plate.

In addition, the first swash plate plate, the swash plate projection and the second swash plate plate is characterized in that coupled by friction welding.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view showing a compressor according to the present invention, Figure 4 is a perspective view showing a state in which the swash plate according to the present invention, Figure 5 is a front view showing a state in which the swash plate and the drive shaft according to the present invention is coupled.

In the compressor according to the present invention, the swash plate 40 which rotates in the swash plate chamber 24 inside the compressor 10 is inclinedly coupled, and the refrigerant sucked into the compressor 10 from the outside is cylinder bore 21. A flow path 31 is formed to move to the at least one flow path 31, and at least one inlet 32 is formed in communication with the swash plate chamber 24 and is spaced apart from both sides of the inlet 32 in the axial direction. A drive shaft 30 in which a pair of outlets 33 are formed in opposite directions to each other; The drive shaft 30 is rotatably installed in the shaft support hole 25, and a plurality of cylinder bores 21 are formed at both sides of the swash plate chamber 24, and sucked into the flow path 31 of the drive shaft 30. Front and rear cylinder blocks formed with a suction passage 22 for communicating the shaft support hole 25 and each cylinder bore 21 so that the refrigerant can be sucked into each cylinder bore 21 sequentially during the rotation of the drive shaft (30). (20, 20a); A plurality of pistons (50) mounted on an outer circumference of the swash plate (40) via a shoe (45) and reciprocating in the cylinder bore (21) in conjunction with a rotational movement of the swash plate (40); Front and rear housings 11 and 11a coupled to both sides of the front and rear cylinder blocks 20 and 20a and having discharge chambers 12 formed therein, respectively; Since the valve unit 60 interposed between the front and rear cylinder blocks 20 and 20a and the front and rear housings 11 and 11a, respectively, is the same as the prior art, a detailed description of the above configuration will be given below. It will be omitted.

The swash plate 40 of the compressor 10 according to the present invention includes a first swash plate plate 40a, a swash plate protrusion 40c, and a second swash plate plate 40b, as shown in FIGS. 3 to 6. consist of.

The first swash plate 40a is formed in a disc shape, and a second swash plate 40b having a shape corresponding to the first swash plate 40a is provided at a position opposite to the first swash plate 40a. do.

Here, the second swash plate plate 40b is provided with a plurality of swash plate protrusions 40c having a rotary wing shape.

One side of the swash plate protrusion 40c corresponds to the first swash plate plate 40a, and the other side of the swash plate protrusion 40c corresponds to the second swash plate. The swash plate protrusion 40c is radially disposed on the second swash plate 40b, and has the shape curved at a predetermined angle in the rotational direction of the swash plate with respect to its radial direction from the center of the swash plate 40. A plurality of suction passages 42 are formed which communicate with 32, respectively.

The suction passage 42 is formed such that one end thereof communicates with the swash plate chamber 24, and the other end communicates with the inlet 31 of the drive shaft 30 so that the flow path between the swash plate chamber 24 and the drive shaft 30 is inclined. Let (31) communicate.

In addition, the swash plate protrusion 40c is preferably formed such that the width of the suction passage 42 becomes narrower toward the center of the swash plate 40.

That is, the refrigerant in the swash plate chamber 24 is sucked through the suction passage 42 in a direction opposite to the rotation of the swash plate 40 rotated by the drive shaft 30, and the inner wall surface of the suction passage 42 is predetermined. As it is formed to have a curvature and the width thereof becomes narrower toward the center of the swash plate 40, the suction resistance of the refrigerant is reduced and the refrigerant is smoothly sucked to increase the efficiency of the refrigerant. Of course, it is also possible to vary the size of the curvature of the suction passage 42 according to the shape of the swash plate 40 and the drive shaft 30 configured in the compressor 10.

As described above, the first swash plate plate 40a, the swash plate protrusion 40c, and the second swash plate plate 40b constituting the swash plate 40 are joined by friction welding. In addition to the friction welding can be combined through a variety of coupling means.

Briefly describing the refrigerant circulation process of the compressor 10 configured as described above is as follows.

In the compressor 10 according to the present invention, when the drive shaft 30 selectively receives power from an electromagnetic clutch (not shown) rotates, the swash plate 40 coupled thereto rotates, and at this time, The plurality of pistons 50 linked to the rotational movement repeatedly perform the action of sucking and compressing the refrigerant while reciprocating the inside of the cylinder bore 21 of the cylinder blocks 20 and 20a.

During the suction stroke of the piston 50, an external refrigerant is supplied into the swash plate chamber 24 through the refrigerant suction port 71, and then between the first swash plate plate 40a and the second swash plate plate 40b. After passing through the suction passage 42 formed to be curved in the passage 32 through the inlet 32 of the flow path 31 formed in the drive shaft 30 passes through the inside of the flow path 31 and the outlet 33 of the flow path 31 It is directly sucked into the cylinder bore 21 through.

In addition, during the compression stroke of the piston 50, the refrigerant sucked into the cylinder bore 21 is compressed by the piston 50 and then discharged to the discharge chambers 12 of the front and rear housings 11 and 11a. The refrigerant is discharged to the refrigerant discharge port 72 through the discharge passage 44 and the muffler 70 of the front and rear cylinder blocks 20 and 20a.

As described above, the present invention forms a flow path 31 inside the hollow drive shaft 30 and moves the refrigerant sucked into the swash plate chamber 24 to the cylinder bore 21 through the flow path 31. In the configuration of a fixed displacement swash plate type compressor of the suction rotary valve type, the curved suction passage 42 is coupled by engaging the swash plate protrusion 40c between the first and second swash plate plates 40a and 40b of the swash plate 40. By applying the structure to form the refrigerant to facilitate the suction, it can be applied to the same method and configuration as well as the various types of compressors, such as the electric compressor as well as the fixed-capacity swash plate type compressor, it is possible to obtain the same effect.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to such specific embodiments, and those skilled in the art may appropriately change within the scope described in the claims of the present invention. This will be possible.

As described above, according to the compressor according to the present invention, in the structure in which the refrigerant is sucked into the cylinder bore through the hollow drive shaft, the swash plate is manufactured in a separate type, and when the swash plate is combined, a plurality of suction passages curved in the swash plate rotation direction are provided. By forming and forming the smooth intake of the refrigerant through the curved path inside the swash plate, it is possible to reduce the refrigerant suction resistance sucked into the drive shaft as well as to increase the refrigerant suction to improve the efficiency of the refrigerant.

Claims (3)

The swash plate 40 rotating in the swash plate chamber 24 inside the compressor 10 is inclinedly coupled therein, and the flow path 31 allows the refrigerant sucked into the compressor 10 from the outside to move to the cylinder bore 21. Is formed, one or more inlets 32 communicating with the swash plate chamber 24 are formed in the flow path 31, and a pair of outlets 33 are spaced apart from both sides of the inlet 32 in the axial direction. Drive shafts 30 formed in opposite directions to each other; The drive shaft 30 is rotatably installed in the shaft support hole 25, and a plurality of cylinder bores 21 are formed at both sides of the swash plate chamber 24, and sucked into the flow path 31 of the drive shaft 30. Front and rear cylinder blocks formed with a suction passage 22 for communicating the shaft support hole 25 and each cylinder bore 21 so that the refrigerant can be sucked into each cylinder bore 21 sequentially during the rotation of the drive shaft (30). (20, 20a); A plurality of pistons (50) mounted on an outer circumference of the swash plate (40) via a shoe (45) and reciprocating in the cylinder bore (21) in conjunction with a rotational movement of the swash plate (40); Front and rear housings 11 and 11a coupled to both sides of the front and rear cylinder blocks 20 and 20a and having discharge chambers 12 formed therein, respectively; In the compressor comprising a valve unit (60) interposed between the front and rear cylinder blocks (20, 20a) and the front and rear housings (11, 11a), The swash plate 40 includes a first swash plate plate 40a having a disc shape; A plurality of suction passages 42 corresponding to one side surface of the first swash plate plate 40a and having a curved shape along the rotational direction of the swash plate, respectively communicating with the inlet 32 are formed radially. A plurality of swash plate protrusions (40c) is formed, and the compressor characterized in that it comprises a second swash plate plate (40b) of the disk-shaped opposite to the first swash plate (40a). The method of claim 1, The swash plate protrusion (40c) is characterized in that the width of the suction passage 42 is formed narrower toward the center of the swash plate (40). The method of claim 1, And the first swash plate (40a), the swash plate protrusion (40c) and the second swash plate (40b) are joined by friction welding.

Images