KR101379610B1 - Variable displacement swash plate type compressor - Google Patents

Abstract

The present invention relates to a variable displacement swash plate compressor. In the present invention, the housing body 110 forms the appearance and skeleton of the rear housing (100). The partition wall 114 is formed to protrude in a circular shape at the inner center of the housing body 110. A suction chamber 116 is formed in the partition wall 114, and a discharge chamber 119 is formed surrounding the inner edge of the housing body 110. The partition plate 130 is provided in the suction chamber 116. The partition plate 130 divides the inside of the suction chamber 116 into a first space 120a and a second space 120b. A through hole 132 is formed in the partition plate 130 so that the first space 120a and the second space 120b communicate with each other. According to the present invention, when the partition plate is provided inside the rear housing to divide the suction chamber into two spaces, and a through hole is formed at a position adjacent to the center of the partition plate, the distance between the through hole and each cylinder bore is almost reduced. Since it is constant, the refrigerant is uniformly sucked into each cylinder bore to reduce the suction pulsation.

Variable capacity type, swash plate type, noise reduction structure, muffler, suction chamber

Description

Variable displacement swash plate type compressor

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a variable displacement swash plate type compressor, and more particularly, to a variable displacement swash plate type compressor in which a displacement amount varies depending on a load.

FIG. 1 is a partial cross-sectional view of an internal structure of a variable capacity swash plate type compressor according to the prior art. According to this, the center bore 11 is formed through the center of the cylinder block 10. A plurality of cylinder bores 13 are formed to penetrate the cylinder block 10 radially surrounding the center bore 11. A piston (15) is movably installed in the cylinder bore (13). The piston 15 has a cylindrical shape, and the cylinder bore 13 has a cylindrical shape corresponding thereto. One end portion of the piston 15, that is, a portion 17 protruding to the outside of the cylinder bore 13 is formed with a connecting portion 17. The piston 15 compresses the refrigerant in the cylinder bore 13.

A front housing 20 is installed at one end of the cylinder block 10. The front housing 20 cooperates with the cylinder block 10 to form a crank chamber 21 therein. The crank chamber 21 is kept airtight with the outside. The shaft hole 23 is formed to penetrate the front housing 20 back and forth.

The other end of the cylinder block 10, that is, the rear housing 30 is installed on the opposite side where the front housing 20 is installed. A suction port (not shown) and a discharge port (not shown) are formed in the rear housing 30. The suction port serves to transfer the refrigerant coming from the outside of the rear housing 30 to the suction chamber 31 to be described below. The suction port is formed to communicate with the suction chamber (31). The discharge port is formed to communicate with the discharge chamber 33 to be described below. The discharge port serves to transfer the refrigerant compressed in the cylinder bore 13 to the outside.

A suction chamber 31 is formed in the rear housing 30 so as to selectively communicate with the cylinder bore 13. The suction chamber 31 is formed in an area corresponding to the center of the surface facing the cylinder block 10 of the rear housing 30. The suction chamber 31 serves to transfer the refrigerant to be compressed into the cylinder bore 13.

A discharge chamber (33) is formed in the rear housing (30). The discharge chamber (33) is also selectively communicated with the cylinder bore (13). The discharge chamber 33 is formed at a position adjacent to an edge of a surface of the rear housing 30 that faces the cylinder block 10. The discharge chamber (33) is a place where refrigerant compressed in the cylinder bore (13) is discharged and temporarily stays. A control valve 35 is provided at one side of the rear housing 30. The control valve 35 is a configuration for adjusting the angle of the swash plate 48, which will be described below.

The bolt 37 is fastened to fasten the cylinder block 10, the front housing 20, and the rear housing 30 to each other. A plurality of bolts 37 fasten through the edges of the cylinder block 10, the front housing 20 and the rear housing 30 simultaneously.

A drive shaft 40 is installed to be rotatable through the center bore 11 of the cylinder block 10 and the shaft hole 23 of the front housing 20. The driving shaft 40 is rotated by the driving force transmitted from the engine. The drive shaft 40 is rotatably installed in the cylinder block 10 and the front housing 20.

A rotor 44 is provided in the crank chamber 21 so that the drive shaft 40 passes through the center and is integrally rotated with the drive shaft 40. The rotor 44 is fixed to the drive shaft 40 in a substantially disk shape and is installed.

A swash plate (48) is hingedly coupled to the rotor (44) to rotate together with the drive shaft (40). The swash plate 48 is installed at a variable angle with respect to the drive shaft 40 according to the discharge capacity of the compressor. That is, the driving shaft 40 is perpendicular to the longitudinal direction of the driving shaft 40 or inclined at a predetermined angle with respect to the driving shaft 40. The swash plate 48 has its edge 50 connected to the pistons 15 via a shoe 50. That is, the edge of the swash plate 48 is connected to the connecting portion 17 of the piston 15 through the shoe 50 so that the piston 15 is straight in the cylinder bore 13 by the rotation of the swash plate 48. Reciprocate.

Meanwhile, a valve assembly 70 is provided between the cylinder block 10 and the rear housing 30 to control the flow of refrigerant between the suction chamber 31 and the discharge chamber 33 and the cylinder bore 13. . That is, the valve assembly 70 controls the refrigerant flow from the suction chamber 31 to the cylinder bore 13 and from the cylinder bore 13 to the discharge chamber 33.

The valve assembly 70 is provided with a valve plate 72. The valve plate 72 is formed in a discharge shape (not shown) and a suction hole (not shown) at a position corresponding to each cylinder bore 13 in a substantially disk shape.

Both side surfaces of the valve plate 72 are provided with suction leads 74 and discharge leads 75. The suction lead 74 and the discharge lead 75 are elastically deformable and elastically deformed according to the internal pressure of the cylinder bore 13 to open and close the suction hole and the discharge hole (not shown). Do it.

 The operation of the variable displacement swash plate type compressor having such a structure will be described. The swash plate 48 is rotated together with the driving shaft 40 as the driving shaft 40 rotates by the driving force transmitted from the outside. The rotation of the swash plate 48 causes the piston 15 to linearly reciprocate within the cylinder bore 13. [

At this time, as the drive shaft (40) rotates, the refrigerant in the suction chamber (31) is sequentially sucked into each cylinder bore (13). As such, when the refrigerant is delivered to the cylinder bore 13, the piston 15 of the corresponding cylinder bore 13 moves in the direction of the valve assembly 70, and compression of the refrigerant occurs.

Thus, when the refrigerant is compressed in the cylinder bore 13, the pressure inside the cylinder bore 13 becomes relatively high, and the refrigerant is transferred to the discharge chamber 33. In such a state, when the inclination angle of the swash plate 48 is changed by the control valve 35, the amount of refrigerant compressed in the cylinder bore 13 is variable, the discharge amount of the refrigerant is variable.

However, the variable displacement swash plate compressor according to the prior art as described above has the following problems.

When the variable displacement swash plate type compressor is driven again while the driving stops, the refrigerant flows into the cylinder bore 13 through the suction chamber 31 through the suction port. At this time, since the distance between the suction port and each of the cylinder bore 13 is different from each other, the distribution of the refrigerant pressure in the suction chamber 31 becomes uneven during the suction stroke of each cylinder bore 13, that is, the irregular wave, Suction pulsation occurs and there is a problem that noise occurs.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide a variable displacement swash plate type compressor having a rear housing having a partition plate installed therein and acting as a muffler.

According to a feature of the present invention for achieving the object as described above, the present invention includes a cylinder block is formed with a plurality of cylinder bores in which the piston is a linear reciprocating motion in accordance with the rotational movement of the swash plate; A front housing installed at one end of the cylinder block and coupled to the cylinder block to form a crank chamber therein; A suction chamber is formed inside a partition wall installed at the other end of the cylinder block and formed at the inner center of the housing body forming the exterior and the skeleton, and is partitioned by the partition wall to discharge the inner edge of the housing body. And a rear housing having a seal and a suction port formed in communication with the suction chamber, wherein the suction chamber divides an interior of the suction chamber into a first space and a second space, A partition plate having a through hole is formed to communicate the first space and the second space with each other.

The through hole 132 is formed at a position adjacent to the center of the partition plate.

The partition plate is positioned inside the suction chamber by a positioning means, and the positioning means includes: a fixing part protruding from an inner side surface of the suction chamber to support the partition plate; And a fastening member inserted into and fastened to the fixing part through the partition plate, wherein the fixing part is formed lower than the height of the partition wall.

In the present invention, the refrigerant is delivered to the inside of the compressor through the suction port formed in the rear housing, by installing a partition plate inside the rear housing to divide the suction chamber into two spaces, forming a through hole in a position adjacent to the center of the partition plate. In this case, the distance between the through hole and each cylinder bore becomes almost constant. Therefore, since the refrigerant is uniformly sucked into each cylinder bore, the suction pulsation is reduced, thereby reducing the noise.

In addition, since a space that functions as a muffler is formed inside the rear housing without installing a separate muffler outside the compressor, the volume of the compressor can be relatively reduced.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a variable displacement swash plate compressor according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is an exploded perspective view of the main configuration of the variable displacement swash plate compressor according to the present invention, Figure 3 is a perspective view of the configuration of the embodiment of the present invention. In addition, the present invention is applied to the rear housing of the variable displacement swash plate compressor, the configuration is the same as the variable displacement swash plate compressor shown in Figure 1 except for the rear housing. Therefore, only the rear housing having a configuration different from the prior art will be described. In addition, in the embodiment of the present invention, the same components as those of the conventional variable displacement swash plate compressor described above will be described using the reference numerals of the prior art drawings.

As shown in these figures, the appearance and skeleton of the rear housing 100 is formed by the housing body 110. The housing body 110 has a substantially cylindrical shape and is coupled to one end of the cylinder block 10 in which the valve assembly 70 is installed.

The housing body 110 is formed with a plurality of bolt holes (B). The bolt hole (B) is formed around the edge of the housing body (110). The bolt 37 is inserted into and fastened to the bolt hole B.

The discharge hole 112 is formed in the housing body 110. The discharge port 112 is formed in communication with the discharge chamber 119 to be described below. The discharge port 112 serves to transfer the refrigerant compressed in the cylinder bore 13 to the outside.

The inlet 113 is formed in the housing body 110. The suction port 113 is formed at a portion adjacent to the discharge port 112. The suction port 113 serves to deliver the refrigerant from the outside of the housing body 110 to the suction chamber 116 to be described below. The suction port 113 is formed in communication with the suction chamber 116.

The partition wall 114 is formed inside the housing body 110. The partition wall 114 is formed to be spaced apart from the edge of the housing body 110 by a predetermined interval. The partition wall 114 is formed at the inner center of the housing body 110. The partition wall 114 has a substantially cylindrical shape, and serves to partition the suction chamber 116 and the discharge chamber 119 to be described below.

The suction chamber 116 is formed in the partition wall 114. The suction chamber 116 is a portion where the refrigerant entering through the suction port 113 temporarily stays. The suction chamber 116 is selectively communicated with the cylinder bore 13 formed in the cylinder block 10 through the valve assembly 70.

The fixing part 117 is formed to protrude on the inner surface of the suction chamber 116. The fixing part 117 serves to support the partition plate 130. The fixing part 117 is formed in a substantially cylindrical shape, which is lower than the height of the partition wall 114 in consideration of the depth into which the partition plate 130 is inserted. A bolt hole 117 'is formed in the fixing part 117.

As shown in FIG. 3, a fastening member 118 is inserted into and fastened to the bolt hole 117 ′. The fastening member 118 is for fixing the position of the partition plate 130. In this embodiment, the fastening member 118 is a bolt.

A discharge chamber 119 is formed outside the partition wall 114, that is, between the interior of the housing body 110 and the partition wall 114. The discharge chamber 119 is formed to have a substantially ring-shaped area. The discharge chamber 119 is selectively communicated with the cylinder bore 13 formed in the cylinder block 10 through the valve assembly 70.

As shown in FIG. 3, a first space 120a and a second space 120b are formed in the suction chamber 116. The first space 120a and the second space 120b are divided by the partition plate 130 to be described below. The first space 120a is a portion communicating with the suction port 113, and the second space 120b is a portion communicating with the cylinder bore 13.

The first space (120a) serves to reduce the noise transmitted by the suction pulsation generated by the process of the refrigerant is sucked into the cylinder bore 13 to the hose pipe (not shown).

The partition plate 130 is installed in the suction chamber 116. The partition plate 130 has a substantially disc shape and is inserted into and fixed to the suction chamber 116 by a predetermined depth. The partition plate 130 is for partitioning the first space 120a and the second space 120b. A fixing hole 130 ′ is formed in the partition plate 130 to allow the fastening member 118 to pass therethrough.

The through hole 132 is formed at one side of the partition plate 130. The through hole 132 serves to communicate the first space 120a and the second space 120b. That is, the refrigerant sucked through the suction port 113 is first delivered to the first space 120a and then to the second space 120b through the through hole 132. As shown in FIG. 3, the through hole 132 is formed at a position adjacent to the center of the partition plate 130. This is for the distance between the through holes 132 and the respective cylinder bores 13 to be substantially constant.

Hereinafter, the operation of the variable displacement swash plate type compressor according to the present invention will be described in detail.

The swash plate 48 rotates together with the driving shaft 40 as the driving shaft 40 rotates by the driving force transmitted from the outside. Rotation of the swash plate 48 causes the piston 15 to make a linear reciprocating motion inside the cylinder bore 13.

As such, as the driving shaft 40 rotates, the refrigerant sucked into the suction chamber 116 through the suction port 113 is first delivered to the first space 120a in the direction of the arrow. Next, it passes through the through-hole 132 formed in the partition plate 130 and is delivered to the second space (120b).

At this time, since the distance between the through hole 132 and each cylinder bore 13 is substantially constant, the refrigerant is uniformly sucked into each cylinder bore to reduce the suction pulsation. As such, the refrigerant delivered to the second space 120b in the arrow direction shown in FIG. 3 is sequentially sucked into each cylinder bore 13.

When the coolant is transferred into the cylinder bore 13, the piston 15 of the corresponding cylinder bore 13 moves in the direction of the valve assembly 70, and compression of the coolant occurs.

The scope of the present invention is not limited to the embodiments described above, but may be defined by the scope of the claims, and those skilled in the art may make various modifications and alterations within the scope of the claims It is self-evident.

In the illustrated embodiment, the partition plate 130 is fixed to the position by the fastening member 118 is inserted into the fixing portion 117, but is not necessarily limited thereto. For example, when the fixing part 117 is formed in a cylindrical shape such that its diameter becomes smaller toward the tip, the fixing hole 130 'of the partition plate 130 is inserted by a predetermined depth and corresponds to the fixing hole 130'. Insertion is restricted when the outer diameter is in contact with the outer diameter, so that the position of the partition plate 130 may be fixed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-sectional view showing an internal configuration of a variable capacity swash plate type compressor according to the prior art; FIG.

Figure 2 is an exploded perspective view showing the main configuration of the variable displacement swash plate compressor according to the present invention.

3 is a perspective view showing the configuration of an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: rear housing 110: housing body

112: discharge port 113: suction port

114: partition wall 116: suction chamber

117: fixing part 117 ': bolt hole

118: fastening member 119: discharge chamber

120a: first space 120b: second space

130: partition plate 130 ': fixing hole

132: through hole

Claims (3)

A cylinder block 10 in which a plurality of cylinder bores 13 on which the piston 15 linearly reciprocates along the rotational motion of the swash plate 48 are formed; A front housing 20 installed at one end of the cylinder block 10 and coupled to the cylinder block 10 to form a crank chamber 21 therein; Suction chamber 116 is formed inside the partition wall 114 which is installed at the other end of the cylinder block 10 and is formed in the inner center of the housing body 110 forming the appearance and skeleton, and the partition wall ( The discharge chamber 119 is formed by being partitioned by the inner circumference of the housing body 110, and the rear housing 100 having the suction port 113 in communication with the suction chamber 116 is provided. In a variable displacement compressor; The suction chamber 116 divides the inside of the suction chamber 116 into a first space 120a and a second space 120b, and at the same time, the first space 120a and the second space 120b are provided. The partition plate 130 is provided with a through hole 132 is formed to communicate with each other , The through hole 132 is formed in a position adjacent to the center of the partition plate variable displacement swash plate compressor. delete The method of claim 1, The partition plate 130 is positioned inside the suction chamber 116 by positioning means, and the positioning means is formed to protrude from an inner side surface of the suction chamber 116 so that the partition plate 130 is located. Fixing portion 117 for supporting the; And a fastening member 118 penetrating through the partition plate 130 and inserted into and fastened to the fixing part 117. The fixing part 117 is formed to be lower than the height of the partition wall 114. Variable displacement swash plate compressor characterized in that.

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