KR101206223B1 - A Swash-Plate Type Compressor - Google Patents

Abstract

The present invention relates to a swash plate compressor, and more particularly, to a swash plate compressor having a valve plate assembly which forms a gap between the suction lead and the valve plate to reduce the noise of the suction lead hitting the valve plate. The swash plate compressor according to the present invention includes a cylinder block (10) having a plurality of cylinder bores (11) arranged radially therein; A front housing 20 installed at the front side of the cylinder block 10 to form a crank chamber 21 therein; A rear housing (30) installed at a rear side of the cylinder block (10) to form a refrigerant suction chamber (31) and a refrigerant discharge chamber (32) therein; A driving shaft 50 having one end rotatably penetrating the front housing 20 and the other end rotatably inserted into the center of the cylinder block 10; A swash plate 70 coupled to the drive shaft 50 to rotate together with the drive shaft 50; A plurality of pistons 40 reciprocally inserted into each of the cylinder bores 11 and having a bridge 41 formed at a rear end thereof; And installed between the cylinder block 10 and the rear housing 30 to suck or discharge the refrigerant in accordance with the reciprocating motion of the piston 40, the suction lead plate 120, valve plate 110 and discharge lead plate ( A valve plate assembly configured to include 130; In the swash plate compressor 1000 is configured to include, characterized in that the suction lead elastic deformation portion is formed in the contact portion of the neck of the suction lead 121 of the valve plate 110 is formed.

Compressor, swash plate, swash plate, valve plate, suction lead, blow sound, noise, knurling, knurling

Description

Swash Plate Compressor {A Swash-Plate Type Compressor}

1 is a cross-sectional view of a swash plate compressor.

Figure 2 is a valve plate configuration according to the prior art.

3 is an exploded perspective view of the valve plate.

Figure 4 is a front view of the valve plate provided in the valve plate assembly according to the present invention.

5 is a knurling part forming step.

Figure 6 is a flow chart of the operation of the valve plate assembly according to the present invention.

DESCRIPTION OF REFERENCE NUMERALS

1000: compressor

10: cylinder block 11: cylinder bore

20: front housing 21: crankcase

30: rear housing 31: refrigerant suction chamber 32: refrigerant discharge chamber

40: piston 41: bridge 42: shoe

50: drive shaft 51: spring 60: rotor

70: swash plate 71: through hole

72: hub pin 73: hinge

80: control valve

100: valve plate assembly

110: valve plate 111: suction hole 112: discharge hole

120: suction lead plate 121: suction lead 122: gasket

130: discharge lead plate 131: discharge lead 132: retainer

P ₁ , P ₂ , P: Knurled part

The present invention relates to a swash plate compressor, and more particularly, to a swash plate compressor having a valve plate assembly which forms a gap between the suction lead and the valve plate to reduce the noise of the suction lead hitting the valve plate.

Generally, compressors mounted in automobiles are classified into fixed-capacity compressors and variable-capacity compressors. Among them, fixed-capacity compressors are reciprocating (using crank, swash plate or wobble plate) and rotary (using vane rotary or scrolling). The variable displacement compressors are classified into using wobble plates and using double or swash plates. Increasingly low noise and low power of automotive parts is increasing the use of variable displacement compressors rather than fixed displacement compressors, in particular, variable displacement swash plate compressor is inclined angle of the swash plate according to the load of the evaporator By controlling the discharge flow rate of the compressor to control the clutch can be reduced to a minimum, and the clutch operating noise can be improved, as well as to avoid unnecessary maximum capacity operation can improve the vehicle operation.

The variable displacement swash plate type compressor has a structure as shown in FIG. 1, that is, a cylinder block 10 having a plurality of cylinder bores 11 formed in an axial direction along a concentric circle, and the cylinder block 10. The front housing 20 is installed at the front side of the crank chamber 21 to form the inside, and the rear side of the cylinder block 10 is installed in the refrigerant suction chamber 31 and the refrigerant discharge chamber 32 therein. A plurality of pistons (40) having a rear housing (30) and a reciprocating motion inserted into each cylinder bore (11) of the cylinder block (10) and a bridge (41) formed at a rear end thereof, and one end thereof being A drive shaft 50 rotatably penetrates the front housing 20 and a rear end is inserted into the center of the cylinder block 10 to be rotatably supported by the drive shaft 50 in the crank chamber 21. Rotor 60 is coupled to rotate with the drive shaft 50, and the drive shaft ( 50 is installed to be movable around the bush or hub pin 72, and the edge is rotatably coupled to the insertion space of the piston (40) bridge 41 via the shoe (42) and the front upper portion A swash plate 70, the center of which is hinged to the rotor 60, is installed to be tilted with respect to the drive shaft 50 while rotating with the rotor 60, and the cylinder block 10 and the rear housing. And a valve plate assembly 100 for sucking refrigerant from the refrigerant suction chamber 31 to the cylinder bore 11 and discharging the compressed refrigerant from the cylinder bore 11 to the refrigerant discharge chamber 32. It is made to include. In addition, the inclination angle of the swash plate 70 with respect to the drive shaft 50 is adjusted according to the pressure change in the crank chamber 21 by the control valve 80 installed in the rear housing 30. On the other hand, the spring 51 interposed in the drive shaft 50 between the rotor 60 and the swash plate 70 to support the swash plate 70 with respect to the rotor 60 to return the swash plate 70 to its initial position. It works.

The valve plate assembly 100 includes a suction lead plate 120, a valve plate 100, and a discharge lead plate 130, and the suction lead plate 120 includes a suction lead 121 (not shown in FIG. 1). A discharge lead 131 (not shown in FIG. 1) is formed in the discharge lead plate 130. As described above, the variable displacement swash plate compressor 1000 allows the plurality of pistons 40 disposed along the concentric circle of the cylinder block 10 to sequentially reciprocate back and forth by rotation of the swash plate 70. do. At the time of the suction stroke of the piston 40 from the cylinder bore 11, the suction lead 121 of the valve plate assembly 100 is opened by the pressure drop inside the cylinder bore 11 to open the cylinder bore 11. ) And the refrigerant suction chamber 31 communicate with each other so that the refrigerant flows into the cylinder bore 11 from the refrigerant suction chamber 31. In the compression stroke from the cylinder bore 11, the refrigerant is compressed by an increase in the pressure inside the cylinder bore 11, and the discharge lead 131 of the valve plate assembly 100 is opened to open the cylinder bore 11. And the refrigerant discharge chamber 32 communicate with each other so that the compressed refrigerant is discharged from the cylinder bore 11 to the refrigerant discharge chamber 32. At this time, since the discharge lead 131 may be excessively open to cause breakage or deformation, a retainer 132 for limiting the opening degree of the discharge lead 131 is generally provided. In addition, since the inclination angle of the swash plate 70 is adjusted in response to the pressure difference between the pressure in the crank chamber 21 and the suction pressure in the cylinder bore 11, the discharge capacity of the compressor 1 is variable.

3 is an exploded perspective view of a typical valve plate assembly 100. The valve plate assembly 100 according to the present invention is composed of the retainer 132, the discharge lead plate 130, the valve plate 110, the suction lead plate 6 and the gasket 122 in turn as shown, The valve plate assembly 100 configured as described above is coupled to the rear housing 30 of the compressor. The suction plate 31 and the discharge hole 32 are formed in the valve plate 110, and the suction lead plate 6 and the discharge lead 131 having suction leads 121 formed on both sides of the valve plate 110, respectively. The discharge lead plate 130 is formed is attached, the suction lead 121 or the discharge lead 131 is opened at the time of suction or discharge, so that the refrigerant can flow through the valve plate 110. The gasket 122 may serve to firmly configure the valve plate assembly 100 itself as well as to firmly fix the valve plate assembly 100 to the rear housing 30. In addition, the gasket 122 is generally located between the valve plate assembly 100 and the rear housing 30 as well as the position shown in FIG. 3, or both.

During the suction / discharge process, the suction lead plate 120 and the discharge lead plate 130 are opened and closed, respectively, and the compression process of the refrigerant proceeds. At this time, the suction lead plate 120 is opened and then closed again when the suction lead ( There was a problem that the noise is generated by the 121 hitting the valve plate 110. In US Patent No. 6,912,783 (hereinafter referred to as Prior Art 1), a knurling portion P ₁ is disposed around the suction hole 111 of the valve plate 110 as shown in FIG. It was formed to reduce the blow sound by reducing the contact area when the suction lead 121 hits the valve plate (110). (Previous technique 1 shows a valve plate in which the discharge hole is formed on the outside and the suction hole is formed on the inside, unlike FIG. 1.) However, in the prior art 1, the contact area between the suction lead 121 and the valve plate 110 is provided. As this decreases, the closing of the suction hole 111 is not made airtight, and thus leakage of the refrigerant is likely to occur. As such, when the leakage of the refrigerant occurs, the compression efficiency is significantly lower than that of the original compressor having the same capacity. Therefore, the volume of the compressor itself is increased because the capacity must be increased to obtain the desired compression efficiency. Further, in Japanese Laid-Open Publication No. 191-127086 (hereinafter referred to as Prior Art 2), the knurling portion P ₂ is formed at the base of the discharge lead 131 as shown in FIG. The configuration of forming the present invention is disclosed, and an additional effect of reducing the noise generated when the discharge lead 131 strikes the valve plate 110 may be expected. However, when the compressor has a minimum inclination angle, the discharge capacity is minimal, and the blow sound of the suction lead 121 is louder than the blow sound of the discharge lead 131, which causes noise and refrigerant leakage in the compressor. there is a problem.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a swash plate compressor having a valve plate assembly to reduce the noise of the valve plate hitting the suction lead and prevent refrigerant leakage In providing.

The swash plate compressor of the present invention for achieving the object as described above, the cylinder block 10 is formed with a plurality of cylinder bores (11) arranged radially therein; A front housing 20 installed at the front side of the cylinder block 10 to form a crank chamber 21 therein; A rear housing (30) installed at a rear side of the cylinder block (10) to form a refrigerant suction chamber (31) and a refrigerant discharge chamber (32) therein; A driving shaft 50 having one end rotatably penetrating the front housing 20 and the other end rotatably inserted into the center of the cylinder block 10; A swash plate 70 coupled to the drive shaft 50 to rotate together with the drive shaft 50; A plurality of pistons 40 reciprocally inserted into each of the cylinder bores 11 and having a bridge 41 formed at a rear end thereof; And installed between the cylinder block 10 and the rear housing 30 to suck or discharge the refrigerant in accordance with the reciprocating motion of the piston 40, the suction lead plate 120, valve plate 110 and discharge lead plate ( A valve plate assembly configured to include 130; In the swash plate compressor 1000 is configured to include, characterized in that the suction lead elastic deformation portion is formed in the contact portion of the neck of the suction lead 121 of the valve plate 110 is formed. In addition, the valve plate assembly 100 is coupled to the drive shaft 50, the rotor 60 to rotate with the drive shaft 50; And a hinge 73 disposed between the rotor 60 and the swash plate 70 to change an inclination angle of the swash plate 70. It is configured to further include, the swash plate 70 is slidably mounted to the drive shaft 50 so that the inclination angle with respect to the axial direction of the drive shaft 50 in accordance with the pressure change of the crank chamber 21 is adjusted. It is characterized in that it is provided in a variable displacement swash plate type compressor.

At this time, the suction lead elastic deformation portion is a knurled portion (P), the knurled portion (P) is characterized in that the height protruding from the surface of the valve plate 110 is 20㎛ or more and 50㎛ or less. In addition, the knurling portion (P) is characterized by being formed by press working.

Hereinafter, the swash plate compressor according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

4 is a front view of the side in contact with the suction lead plate 120 of the valve plate 110 provided in the valve plate assembly 100 according to the present invention. As shown, the valve plate 110 according to the present invention is to form a knurled portion (P) in the contact portion of the neck of the suction lead 121. The knurling portion P may be made by press working in the order as shown in FIG. 5. At this time, the knurled portion P formed by the press working has a protrusion and a depression with respect to the surface of the valve plate 110 as shown in the drawing. Typically, the height h of the protrusion and the depth H of the depression are h: H = about 1: 3 ratio. At this time, the height h of the protruding portion of the knurled portion P is 20 μm or more to 50 μm or less from the surface of the valve plate 110, and the suction lead 121 and the valve plate 110 are formed by the knurled portion P. Allow a predetermined gap to be formed therebetween. The knurling portion P may be formed for each cylinder, or may be formed only in part.

6 shows the operation sequence of the valve plate assembly 100 according to the present invention. The striking force of the suction lead 121 is proportional to the speed of the tip of the suction lead, and the total energy possessed by the suction lead 121 is represented as the sum of the elastic energy due to deformation and the kinetic energy due to the movement speed. When the valve plate 110 and the suction lead plate 120 are completely in contact with each other (that is, in the conventional case), when the suction lead 121 is closed by the discharge pressure (see FIG. 4 (A)), The elastic energy becomes zero, the kinetic energy becomes maximum, and the movement speed and the impact force become maximum.

By the way, when the knurled portion (P) is formed in the portion of the valve plate 110 in contact with the neck of the suction lead 121, the energy distribution when the suction lead 121 is closed by the discharge pressure This is different. First, when the suction process is performed, as shown in FIG. 6A, a suction pressure is generated to open the suction lead 121 closing the suction hole 111. As the suction pressure becomes stronger, the suction lead 121 is greatly elastically deformed as shown in FIG. 6 (B), and the refrigerant is sucked into the cylinder bore 11 through the suction hole 111 which is completely open. At this time, the elastic energy of the suction lead 121 becomes the maximum, and the kinetic energy becomes 0 (if ideal). In this way, the suction lead 121 is largely deformed by the suction pressure and is opened, and when the discharge pressure is generated, the suction lead 121 closes the suction hole 111 again. At this time, since a predetermined interval is formed between the valve plate 110 and the suction lead plate 120 by the knurling portion P, as shown in FIG. When the valve plate 110 and the suction lead 121 are not in contact with each other, the valve plate 110 and the suction lead 121 are not in contact with each other. When the suction lead 121 continues to receive the discharge pressure, as shown in FIG. 6D, the suction lead 121 closes the suction hole 111 of the valve plate 110 in a state in which elastic deformation occurs, thereby closing the valve plate 110. ), The energy of the suction lead 121 is distributed to some elastic energy and kinetic energy, that is, the kinetic energy is reduced than when the (6).

That is, in the conventional case in which the knurling portion P is not formed, the moment when the suction lead 121 closes the suction hole 111 becomes the instant of the maximum elastic energy 0 / kinetic energy, whereas the knurling portion as in the present invention. In the case where P is formed, the suction lead 121 is in a state in which the suction lead 121 has a predetermined elastic energy at the moment when the suction lead 121 closes the suction hole 111. Is reduced compared to. As such, when the structure of the present invention is adopted, the kinetic energy at the moment when the suction lead 121 comes into contact with the valve plate 110 is reduced. Accordingly, the speed of the end of the suction lead 121 is reduced, and thus the suction lead ( The force that 121 strikes the valve plate 110 may be reduced, thereby ultimately reducing the hitting sound.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

As described above, according to the present invention, in the valve plate assembly of the swash plate type compressor, while preventing leakage of the refrigerant, the noise generated while the suction lead hits the valve plate is much reduced, thus creating a more comfortable driving environment. It works. In particular, according to the present invention, since the noise during the low rotation of the compressor is reduced, there is an effect that greatly contributes to reducing the overall noise generated in the vehicle when the idle state.

Claims (3)

A cylinder block 10 having a plurality of cylinder bores 11 arranged radially therein; A front housing 20 installed at the front side of the cylinder block 10 to form a crank chamber 21 therein; A rear housing (30) installed at a rear side of the cylinder block (10) to form a refrigerant suction chamber (31) and a refrigerant discharge chamber (32) therein; A driving shaft 50 having one end rotatably penetrating the front housing 20 and the other end rotatably inserted into the center of the cylinder block 10; A swash plate 70 coupled to the drive shaft 50 to rotate together with the drive shaft 50; A plurality of pistons 40 reciprocally inserted into each of the cylinder bores 11 and having a bridge 41 formed at a rear end thereof; And installed between the cylinder block 10 and the rear housing 30 to suck or discharge the refrigerant in accordance with the reciprocating motion of the piston 40, the suction lead plate 120, valve plate 110 and discharge lead plate ( A valve plate assembly configured to include 130; In the swash plate compressor 1000 is configured to include, A suction lead elastic deformation portion is formed at a portion where the neck of the suction lead 121 of the valve plate 110 contacts, the suction lead elastic deformation portion is a knurled portion P, and the knurled portion P is the valve plate ( 110) A swash plate type compressor, characterized in that the height protruding from the surface is 20㎛ 50㎛ or less. According to claim 1, wherein the swash plate compressor 1000 A rotor (60) coupled to the drive shaft (50) and rotating together with the drive shaft (50); And a hinge 73 disposed between the rotor 60 and the swash plate 70 to change an inclination angle of the swash plate 70. It is configured to further include, the swash plate 70 is slidably mounted to the drive shaft 50 so that the inclination angle with respect to the axial direction of the drive shaft 50 in accordance with the pressure change of the crank chamber 21 is adjusted. A swash plate compressor, characterized in that the variable displacement swash plate compressor. The knurling portion P according to claim 1 or 2, A swash plate compressor, which is formed by press working.

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