KR100291759B1 - Refrigerant compressor - Google Patents

Abstract

The refrigerant compressor is integrally formed of one first sheet-shaped valve member having at least one suction valve and a first seal member disposed between the cylinder block and the valve plate, and at least one discharge valve and the second seal member. The seal member is integrally formed with a second sheet-shaped valve member disposed between the valve plate and the cylinder head. Elastic films are formed on both surfaces of the first and second sheet-shaped valve members, respectively. In another type of refrigerant compressor, at least one discharge valve and the seal member are integrally formed of one sheet-shaped valve member disposed between the outer circumferential wall of the cam ring and the discharge valve cover, and elastic films are formed on both sides of the sheet-shaped valve member. Formed.

Description

Refrigerant Compressor {REFRIGERANT COMPRESSOR}

The present invention relates to a refrigerant compressor.

1 is a longitudinal sectional view showing a conventional rocking plate compressor.

The cylinder block 201 is provided with a plurality of cylinder bores 206 at predetermined intervals in the circumferential direction about the shaft 205. The rear head 203 is fixed to the rear end surface of the cylinder block 201 through the valve plate 202, and the discharge chamber 212 and the suction chamber 213 are formed in the rear head 203. The discharge chamber 212 is partitioned into two discharge spaces 212a and 212b by the partition wall 214.

The front head 204 is fixed to the front end face of the cylinder block 201. The crank chamber 208 is formed in the front head 204, and the oscillation plate 210 is accommodated in the crank chamber 208.

The valve plate 202 has a discharge port 216 for communicating the cylinder bore 206 and the discharge chamber 212, and a suction port 215 for communicating the cylinder bore 206 and the suction chamber 123. Each is provided at predetermined intervals in the circumferential direction.

2 is an enlarged cross-sectional view showing a part of FIG. 1, and FIG. 3 is an exploded perspective view for explaining the relationship between the valve plate, the intake valve, the discharge valve, the valve stopper and the gasket.

The suction port 215 is opened and closed by the suction valve 221, and the suction valve 221 is disposed between the front head side end surface of the valve plate 202 and the cylinder block 201.

The discharge port 216 is opened and closed by the discharge valve 217, and the discharge valve 217 is fixed to the rear end side of the valve plate 202 by the rivet 219 together with the valve stopper 218. It is.

In addition, a gasket 231 for maintaining airtightness between the front head end face of the valve plate 202 and the cylinder block 201 and between the rear head end face of the valve plate 202 and the rear head 203. 232 are each excreted.

Figure 4 is a longitudinal sectional view of a conventional vane type compressor, Figure 5 is an exploded perspective view of the discharge valve cover portion.

The vane compressor has a cam ring 301, a rotor 302 rotatably housed in the cam ring 301, a front side block 303 fixed to the front end face of the cam ring 301, and a front side block ( A front head 305 fixed to the front end face of the 303, a rear side block 304 fixed to the rear end face of the cam ring 301, and a rear head fixed to the rear end face of the rear side block 304. 306.

Two discharge ports 316 corresponding to the two compression spaces 312 are provided on the outer circumferential wall 301a of the cam ring 301 (only one discharge port 316 is shown in FIG. 4). Further, a valve fixing part 317a and a discharge valve 319 are fixed to the outer circumferential wall 301a of the cam ring 301 by bolts 318.

Further, an O-ring 342 is attached between the discharge valve cover 317 and the outer circumferential wall 301a of the cam ring 301 to maintain airtightness.

In the swing plate type compressor, the refrigerant sucked into the refrigerant compressor from the evaporator (not shown) through the external pipe enters the suction chamber 213 in the refrigerant compressor, and then flows into the compression chamber in the cylinder bore 206 through the suction valve 221. (Suction stroke) and after being compressed, flows into the discharge chamber 212 through the discharge valve 217 (compression stroke).

By the way, when the intake valve 221 and the discharge valve 217 are closed, since the valves 221 and 227 are seated rapidly by the repulsive force, an impact sound (joint) is produced by the collision with the valve plate 202.

In addition, when the discharge valve 217 is opened, the discharge valve 217 itself vibrates while it starts to open and reaches the open state, and the vibration spreads in and out of the compressor along with the coolant to appear.

In addition, in order to improve the assemblability of the valves 221 and 217, the cylinder block 201 and the rear head 203 are divided as described above, and the valve plate is disposed between the cylinder block 201 and the rear head 203. 202 and the discharge valve 217 and the suction valve 221 are provided, but at the same time, the gaskets 231 and 232 are also used to ensure the airtightness between the cylinder block 201 and the rear head 203. As the number of parts increases, not only the assembly performance of the compressor itself decreases, but also the manufacturing cost increases.

In the vane compressor, the refrigerant gas flowing from the suction port 306a enters the compression space 312 from the suction chamber 311 and is compressed, passing through the discharge valve 319 from the discharge port 316, and passing through the passage 303a. Is discharged from the discharge port 305a through the discharge chamber 310.

By the way, when the discharge valve 319 is closed, since the discharge valve 319 is seated suddenly by the elastic force, the impact sound (joint) is produced by the collision with the outer peripheral wall 301a.

In addition, when the discharge valve 319 is opened, the discharge valve 319 itself vibrates while it starts to open and reaches the open state, and the vibration spreads in and out of the compressor along with the refrigerant, resulting in a joint.

In addition, since the O-ring 342 is used to ensure airtightness, there is a problem that the number of parts increases and the assemblability decreases, and the compressor itself becomes expensive.

An object of the present invention is to provide a refrigerant compressor that can reduce the occurrence of noise during operation without causing an increase in cost by increasing the number of parts.

1 is a longitudinal sectional view showing a conventional rocking plate compressor.

FIG. 2 is an enlarged cross-sectional view of a portion of FIG. 1. FIG.

3 is an exploded perspective view illustrating a relationship between a valve plate, a suction valve, a discharge valve, a valve stopper, and a gasket;

Figure 4 is a longitudinal sectional view of a conventional vane type compressor.

5 is an exploded perspective view of a discharge valve cover portion;

6 is an exploded perspective view illustrating a relationship between a suction valve, a valve plate, and a discharge valve.

7 is a longitudinal sectional view of a rocking plate compressor of a first embodiment of the present invention;

8 is a partially enlarged view of FIG. 7;

9A is a plan view of the discharge valve sheet, and 9B is a partial cross-sectional view thereof.

10A is a plan view of the suction valve sheet, and 10B is a partial cross-sectional view thereof.

11 is a longitudinal sectional view of the vane compressor of the second embodiment of the present invention;

12 is an exploded perspective view of a discharge valve cover portion;

According to a first aspect of the present invention for achieving the above object, a cylinder block having at least one cylinder bore formed therein, a valve plate disposed on a cross section of the cylinder block, and a cross section of the cylinder block through the valve plate. A fixed cylinder head, a high pressure chamber and a low pressure chamber formed in the cylinder head, at least one suction port provided in the valve plate to communicate the at least one cylinder bore with the low pressure chamber, and the at least one At least one discharge port for communicating the two cylinder bores and the high pressure chamber, at least one suction valve for opening and closing the at least one suction port, and at least one opening and closing the at least one discharge port, respectively. Discharge valves disposed between the cylinder block and the valve plate to ensure airtightness The refrigerant compressor provided with a seal member and a second seal member of the first, is disposed between said cylinder head and the valve plate to secure the air-tightness is provided.

The refrigerant compressor according to the first aspect of the present invention integrally forms the at least one suction valve and the first seal member with one sheet-shaped valve member, and both surfaces of the first sheet-shaped valve member. At the same time, the at least one discharge valve and the second seal member are integrally formed from one sheet-shaped valve member to form an elastic coating on both sides of the second sheet-shaped valve member. Characterized in that formed.

According to this refrigerant compressor, elastic films are formed on both surfaces of the first and second sheet-shaped valve members, and the elastic member layer collides with the valve plate when the suction valve and the discharge valve are closed, thereby compressing the elastic member. The reaction force absorbs the impact force caused by the seating of the suction valve and the discharge valve, and reduces the impact sound.

In addition, since the discharge valve has three layers having different natural frequencies, the vibration peak when the valve is opened can be attenuated by lowering the peak value of resonance, thereby reducing the occurrence of noise caused by the vibration of the discharge valve itself.

In addition, since the sheet-shaped valve member has the functions of the valve and the sealing member, the number of parts can be reduced, and the process can be omitted by that amount, and the increase in manufacturing cost is suppressed.

The first sheet valve member and the second sheet valve member are substantially the same as the valve plate, and the at least one suction valve is formed inside the annular first seal member, and the at least one A discharge valve is formed inside the annular second seal member.

Preferably, the first sheet valve member and the second sheet valve member are each made of a gasket material.

Preferably, the gasket material comprises a cold rolled steel sheet and a steel strip (SPCC).

Preferably, the elastic coating is made of rubber.

According to a second aspect of the present invention for achieving the above object, a cam ring having an outer circumferential wall, at least one discharge port provided on an outer circumferential wall of the cam ring, and the at least one discharge port correspond to the cam ring. At least one discharge valve cover fixed to the outer circumferential wall of the cam ring, and at least one discharge valve disposed between the outer circumferential wall of the cam ring and the discharge valve cover to open and close a corresponding one of the at least one discharge port; And a refrigerant compressor provided with at least one seal member disposed between the outer circumferential wall and the corresponding discharge valve cover to ensure airtightness.

The refrigerant compressor according to the second aspect of the present invention is formed by integrally forming the at least one discharge valve and the seal member with one sheet valve member, and forming elastic films on both surfaces of the sheet valve member. do.

According to the refrigerant compressor according to the second aspect of the present invention, the same effects as in the first aspect can be obtained.

Preferably, the at least one discharge valve is formed inside the seal member.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Embodiment

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing.

7 is a longitudinal cross-sectional view of the rocking plate compressor of the first embodiment of the present invention, FIG. 8 is a partially enlarged view of FIG. 7, and FIG.

The rear head 3 is fixed to one end surface of the cylinder block 1 of this rocking plate compressor via the valve plate 2, and the front head 4 is fixed to the other end surface.

The cylinder block 1 is provided with a plurality of cylinder bores 6 at regular intervals in the circumferential direction about the axis 5. In these cylinder bores 6, the piston 7 freely swings freely.

A crank chamber 8 is formed in the front head 4, and the crank chamber 8 accommodates a swinging plate 10 that swings about the hinge ball 9 in association with the rotation of the shaft 5. It is.

The swinging plate 10 is connected to the shaft 5 via the thrust flange 51, the drive hub 52, and the like. In addition, the swinging plate 10 is connected to the piston 7 via the connecting rod 11, and the piston 7 reciprocates in the cylinder bore 6 by the swinging of the swinging plate 10. The inclination angle of this rocking plate 10 changes depending on the pressure of the crank chamber 8.

In the rear head 3, a discharge chamber (high pressure chamber) 12 and a suction chamber (low pressure chamber) 13 positioned around the discharge chamber 12 are formed. The discharge chamber 12 is partitioned by the partition 14 into the discharge space 12a and the discharge space 12b, and the positive discharge spaces 12a and 12b are formed through the aperture hole 14a provided in the partition 14. Communicating.

The valve plate 2 is formed in the same shape as the cross section of the cylinder block. The valve plate 2 has a discharge port 16 for communicating the cylinder bore 6 with the discharge space 12a and a cylinder bore 6. ) And a suction port 15 for communicating the suction chamber 13 are provided for each cylinder.

The discharge valve 17 and the gasket portion (second seal member) 32 are integrally formed with one discharge valve sheet (second sheet-shaped valve member) 42. The discharge valve sheet 42 is fixed to the rear head side end face of the valve plate 2 together with the valve stopper 18 by the rivet 19, and the discharge port 16 is opened and closed by the discharge valve 17. do.

In addition, the suction valve 21 and the gasket portion (first seal member) 31 are integrally formed with one suction valve sheet (first sheet valve member) 41. The intake valve seat 41 is disposed between the valve plate 2 and the cylinder block 1, and is provided by the rivet 19 together with the discharge valve 17 and the valve stopper 18 on the rear head side. It is fixed to the front head side end surface of the valve plate 2. The suction pot 15 is opened and closed by the suction valve 21.

9A is a plan view of the discharge valve sheet, and 9B is a partial sectional view thereof.

The discharge valve sheet 42 is made of a material conventionally used as a gasket, for example, a substrate 42a made of cold rolled steel sheet and steel strip (SPCC), and an elastic member such as rubber coated on the front and back of the substrate 42a. Layers 42b and 42c (see FIG. 9B).

The discharge valve sheet 42 is composed of an annular gasket portion 32 and a discharge valve 17 disposed inside the annular gasket portion 32 (see FIG. 9A).

The discharge valve 17 is disposed opposite to the discharge port 16 (see FIG. 8), and when the discharge valve 17 is opened, the compression chamber 6a is provided through the discharge port 16 of the valve plate 2. ) And the discharge chamber 12 communicate with each other.

10A is a plan view of the suction valve sheet, and b is a partial cross-sectional view thereof.

The suction valve seat 41 is formed of a material that is conventionally used as a gasket, for example, a substrate 41a made of SPCC, and layers 41b and 41c of elastic members such as rubber coated on the front and back of the substrate 41a. (See FIG. 10B).

The intake valve seat 41 is comprised of the annular gasket part 31 and the intake valve 21 arrange | positioned inside the annular gasket part 31 (refer FIG. 10A).

The suction valve 21 is disposed opposite to the suction port 15 (see FIG. 8), and when the suction valve 21 is opened, the compression chamber 6a is provided through the suction port 15 of the valve plate 2. ) And the suction chamber 13 communicate with each other.

Next, the operation of this rocking plate compressor will be described.

When rotational power of an engine (not shown) is transmitted to the shaft 5, the shaft 5 rotates together with the thrust flange 51 and the drive hub 52, and the swinging plate 10 swings according to the rotation thereof. By virtue of this fluctuation, the piston 7 reciprocates in the cylinder bore 6, and as a result, the volume in the cylinder bore 6 changes. As a result, the suction, compression and discharge of the refrigerant gas are sequentially performed. The high pressure refrigerant gas of the capacity according to the inclination angle of the swinging plate 10 is discharged.

When the suction valve 21 and the discharge valve 17 are closed, the suction valve 21 and the discharge valve 17 are suddenly seated on the valve plate 2, and the impact force at the time of seating is the suction valve seat 41 and the discharge valve. Since it is absorbed by the compressive reaction force of the elastic member coated on the sheet 42, the impact sound can be made small, and since it is not subjected to a large impact, it is difficult to cause breakage or the like of the valve and the reliability is increased.

In addition, since the discharge valve 17 has a three-layer structure of the substrates 42a having different natural frequencies and the layers 42b and 42c of the elastic member, the discharge valve 17 lowers the peak value of resonance to absorb vibration energy when the valve is opened ( Vibration can be attenuated), thereby reducing the occurrence of noise caused by vibration of the discharge valve 17 itself.

In addition, according to the swinging plate type compressor, the discharge valve 17 and the gasket portion 32 are formed of one discharge valve sheet 42, and the suction valve 21 and the gasket portion 31 are formed on the suction valve sheet 41. The number of parts can be reduced while ensuring airtightness between the cylinder block 1 and the rear head 3.

Fig. 11 is a longitudinal sectional view of the vane compressor according to the second embodiment of the present invention, and Fig. 12 is an exploded perspective view of the discharge valve cover portion.

The vane compressor has a cam ring 101, a front side member 125 and a rear side member 120 disposed on both end surfaces of the cam ring 101, and a rotor 102 rotatably housed in the cam ring 101. And a drive shaft 107 of the rotor 102. The drive shaft 107 is rotatably supported by bearings 108 and 109.

The front side member 125 has a front side block 103 fixed to the front end face of the cam ring 101 via an O-ring 121 and a front head 105 fixed to the front end face of the front side block 103. It consists of).

A discharge port 105 of refrigerant gas is formed in the front head 105, and the discharge port 105a communicates with the discharge chamber 110 formed by the front head 105 and the front side block 103.

The rear side member 120 has a rear side block 104 fixed to the rear end surface of the cam ring 101 through an O-ring 122, and a rear head fixed to the rear end surface of the rear side block 104. 106). The rear head 106 is provided with a suction port 106a of refrigerant gas, and the suction port 106a communicates with the suction chamber 111.

Two upper and lower compression spaces 112 are partitioned between the inner circumferential surface of the cam ring 101 and the outer circumferential surface of the rotor 102 (only one compression space 112 is shown in the figure).

A plurality of vane grooves 113 are provided in the rotor 102, and vanes 114 are slidably inserted into the vane grooves 113. The compression space 112 is partitioned by the vanes 114 to form a plurality of compression chambers, and the volume of each compression chamber is changed by the rotation of the rotor 102.

In addition, two discharge ports 116 corresponding to the two compression spaces 112 are provided on the outer circumferential wall of the cam ring 101. The outer peripheral wall 101a of the cam ring 101 also has a discharge valve sheet (sheet-shaped valve member) 142 having a discharge valve 119 for opening and closing the discharge port 116 and opening of the discharge valve 119. The valve stopper 117a which suppresses the quantity is fixed with the bolt 118. The discharge valve 119 and the valve fixing part 117a are hermetically covered by the discharge valve cover 117.

The discharge valve 119 and the seal member (O ring 342) are formed integrally with one discharge valve sheet 142, and elastic members such as rubber are formed on the front and back of the discharge valve sheet 142 by coating. Layers 142b and 142c are formed (only the layer 142b of the outer elastic member is seen in FIG. 12).

The operation of the vane compressor will be described.

When rotational power of an engine (not shown) is transmitted to the drive shaft 107, the drive shaft 107 rotates the rotor 102. The refrigerant gas enters the suction chamber 111 from the suction port 106a and enters the compression space 112 through the suction port (not shown). The refrigerant gas trapped between the vanes 114 is compressed. The compressed refrigerant gas passes through the discharge valve 119 from the discharge port 116, flows out into the discharge chamber 110 through the passage 101a, and is discharged from the discharge port 105a.

According to this second embodiment, during operation of the vane compressor, the layers 142b and 142c of the elastic member perform the same actions as the layers 42b and 42c of the elastic member in the first embodiment. It can have the same effect as the shape.

The present invention can also be applied to a swash plate type refrigerant compressor.

The foregoing is a description of the preferred form of the present invention, and it will be apparent to those skilled in the art that various changes can be made without departing from the spirit and scope of the present invention.

According to the present invention, it is possible to provide a refrigerant compressor that can reduce the occurrence of noise during operation without causing an increase in cost due to an increase in the number of parts.

Claims (10)

A cylinder block having at least one cylinder bore formed therein, a valve plate disposed on the end face of the cylinder block, a cylinder head fixed to the end face of the cylinder block through the valve plate, a high pressure chamber and a low pressure formed in the cylinder head; At least one suction port provided on the valve plate, the at least one cylinder bore communicating with the low pressure chamber, and at least one discharge port for communicating the at least one cylinder bore with the high pressure chamber, respectively. Between an oat, at least one suction valve for opening and closing the at least one suction port, at least one discharge valve for opening and closing the at least one discharge port, respectively, between the cylinder block and the valve plate. A first sealing member disposed to secure airtightness between the cylinder head and the valve plate In a refrigerant compressor having a sealing member of claim 2, which is arranged to secure the air-tightness to, The at least one suction valve and the first seal member are integrally molded with a single sheet-shaped valve member to form an elastic coating on both sides of the first sheet-shaped valve member and at least one of the at least one suction valve. An improved refrigerant compressor as claimed in claim 1, wherein the discharge valve and the second seal member are integrally formed with a second sheet-shaped valve member, and elastic films are formed on both surfaces of the second sheet-shaped valve member. The method according to claim 1, wherein the first sheet valve member and the second sheet valve member are substantially the same type as the valve plate, And the at least one suction valve is formed inside the annular first seal member, and the at least one discharge valve is formed inside the annular second seal member. The refrigerant compressor according to claim 1, wherein the first sheet valve member and the second sheet valve member are each made of a gasket material. The compressor of claim 3, wherein the gasket material comprises a cold rolled steel sheet and a steel strip (SPCC). The refrigerant compressor as set forth in claim 1, wherein the elastic coating is made of rubber. A cam ring having an outer circumferential wall, at least one discharge port provided on an outer circumferential wall of the cam ring, at least one discharge valve cover fixed to an outer circumferential wall of the cam ring so as to correspond to the at least one discharge port, and the cam ring At least one discharge valve disposed between the outer circumferential wall of the discharge valve cover and the discharge valve cover corresponding to the at least one discharge port, and disposed between the outer circumferential wall and the discharge valve cover corresponding to the outer wall. In a refrigerant compressor having at least one seal member for securing, The at least one discharge valve and the seal member are integrally molded from one sheet valve member, An improved refrigerant compressor, characterized in that an elastic coating is formed on both sides of the sheet-shaped valve member. The refrigerant compressor as set forth in claim 6, wherein said at least one discharge valve is formed inside said seal member. The refrigerant compressor as set forth in claim 6, wherein said seat valve member is made of a gasket material. The refrigerant compressor as claimed in claim 8, wherein the gasket material comprises a cold rolled steel sheet and a steel strip (SPCC). The refrigerant compressor as claimed in claim 6, wherein the elastic coating is made of rubber.

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