JP2005147023A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor; equipped with a cylinder bore, a piston reciprocating inside the cylinder bore, a valve plate on which discharge holes guiding compressed fluid inside the cylinder bore to outside are formed, a band plate-shaped discharge valve for opening/closing the discharge holes, and a retainer for regulating an opening of the discharge valve; constituted such that the retainer sandwiches and fixes a base part of the discharge valve in cooperation with the valve plate and allows out-of-plane deformation of a portion facing the discharge holes of the discharge valves; suppressing increase in gas pressure inside the cylinder bore when a discharge gas flow rate is large; and suppressing noise at the time of valve opening. <P>SOLUTION: This compressor is equipped with the cylinder bore, the piston reciprocating inside the cylinder bore, the valve plate on which discharge holes guiding the compressed fluid inside the cylinder bore to outside are formed, the band plate-shaped discharge valve for opening/closing the discharge holes, and the retainer for regulating the opening of the discharge valve. The compressor is constituted, such that the retainer sandwiches and fixes the base part of the discharge valve in cooperation with the valve plate and allows out-of-plane deformation of the portion facing the discharge holes of the discharge valves, and such that the first discharge hole facing a tip part of the portion enabling out-of-plane deformation of the discharge valve and the second discharge hole facing a part in the vicinity of a fixed end of the portion are formed on the valve plate. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cylinder bore, a piston that reciprocates in the cylinder bore, a valve plate in which a discharge hole for guiding the compressed fluid in the cylinder bore is formed to the outside, a strip plate-like discharge valve that opens and closes the discharge hole, and a discharge valve The retainer is configured to cooperate with the valve plate so as to sandwich and fix the base of the discharge valve and to allow out-of-plane deformation of the portion facing the discharge hole of the discharge valve. It relates to a compressor.

A cylinder bore, a piston that reciprocates in the cylinder bore, a valve plate formed with a discharge hole that guides the compressed fluid in the cylinder bore to the outside, a strip-shaped discharge valve that opens and closes the discharge hole, and the opening of the discharge valve Patent application title: Compressor configured with a retainer that regulates, and the retainer clamps and fixes the base of the discharge valve in cooperation with the valve plate and allows for out-of-plane deformation of the portion facing the discharge hole of the discharge valve It is disclosed in Document 1 and the like.
6-40389

In the conventional compressor disclosed in Patent Document 1 and the like, since the opening degree of the discharge valve is regulated by the retainer, when the discharge gas flow rate is large and the discharge gas flow velocity is large, There is a possibility that the flow resistance of the gas flow path formed between the valve plate and the valve plate increases to inhibit the outflow of gas from the cylinder bore, and the gas pressure in the cylinder bore increases to reduce the efficiency of the compressor. When the diameter of the discharge hole is increased to reduce the discharge gas flow rate, the biasing force applied to the discharge valve by the gas in the cylinder bore increases, the movement speed of the discharge valve at the time of valve opening increases, and the discharge valve becomes a retainer. This causes a problem that noise at the time of collision is increased.

The present invention has been made in view of the above problems, and opens and closes a cylinder bore, a piston that reciprocates in the cylinder bore, a valve plate in which a discharge hole that guides compressed fluid in the cylinder bore is formed, and a discharge hole. A strip plate-like discharge valve and a retainer that regulates the opening degree of the discharge valve. The retainer cooperates with the valve plate to clamp and fix the base of the discharge valve and face the discharge hole of the discharge valve. To provide a compressor configured to allow external deformation, wherein the increase in gas pressure in the cylinder bore is suppressed when the discharge gas flow rate is large, and the noise during valve opening is suppressed. Objective.

In order to solve the above-described problems, in the present invention, a cylinder bore, a piston that reciprocates in the cylinder bore, a valve plate in which a discharge hole that guides the compressed fluid in the cylinder bore is formed, and a band that opens and closes the discharge hole. A plate-like discharge valve and a retainer that regulates the opening degree of the discharge valve are provided, and the retainer cooperates with the valve plate to clamp and fix the base of the discharge valve and out of the area facing the discharge hole of the discharge valve. The valve plate is formed with a first discharge hole facing the tip of the part that can be deformed out of plane of the discharge valve and a second discharge hole facing the part near the fixed end of the part. A compressor is provided.
In the present invention, the gas in the cylinder bore flows out of the cylinder bore through the first discharge hole and the second discharge hole. If the sum of the opening area of the first discharge hole and the opening area of the second discharge hole is made larger than the conventional one, an increase in the discharge gas flow rate is suppressed even when the discharge gas flow rate is large, and the gap between the discharge valve and the valve plate is suppressed. An increase in flow resistance of the flow path formed in the cylinder is suppressed, gas outflow from the cylinder bore is promoted, an increase in gas pressure in the cylinder bore is suppressed, and a reduction in efficiency of the compressor is suppressed. The biasing force of the gas applied to the out-of-plane deformable part of the discharge valve is distributed between the tip of the part and the vicinity of the fixed end. An increase in speed is suppressed, and an increase in noise when the discharge valve collides with the retainer when the valve is opened is suppressed.

In a preferred aspect of the present invention, the opening area of the second discharge hole is smaller than the opening area of the first discharge hole.
Since the lift amount at the time of valve opening in the vicinity of the fixed end of the discharge valve that can be deformed out of the plane is small, a large amount of gas cannot be expected to flow out from the second discharge hole. Therefore, it is appropriate to make the opening area of the second discharge hole smaller than the opening area of the first discharge hole.

In the present invention, a cylinder bore, a piston reciprocating in the cylinder bore, a valve plate formed with a discharge hole for guiding the compressed fluid in the cylinder bore to the outside, a strip-shaped discharge valve for opening and closing the discharge hole, A retainer that regulates the opening of the valve, the retainer cooperates with the valve plate to clamp and fix the base of the discharge valve, and allows out-of-plane deformation of the portion facing the discharge hole of the discharge valve. Provided is a compressor characterized in that it is a long hole extending from a position facing a tip end portion of a part of the discharge valve that can be deformed out of plane to a position facing a vicinity of a fixed end of the part.
In the present invention, the gas in the cylinder bore flows out of the cylinder bore through the discharge hole formed as a long hole. If the opening area of the discharge hole is made larger than before, the increase in the discharge gas flow velocity is suppressed even when the discharge gas flow rate is large, and the flow resistance of the flow path formed between the discharge valve and the valve plate is increased. It is suppressed, gas outflow from the cylinder bore is promoted, an increase in gas pressure in the cylinder bore is suppressed, and a decrease in efficiency of the compressor is suppressed. Since the urging force of the gas applied to the out-of-plane deformable part of the discharge valve is distributed from the tip of the part to the vicinity of the fixed end, the discharge valve can be opened even when the discharge gas flow rate is high. An increase in the movement speed is suppressed, and an increase in noise when the discharge valve collides with the retainer when the valve is opened is suppressed.

In a preferred aspect of the present invention, the width of the long hole decreases from a position facing the tip end portion of the discharge valve that can be deformed out of plane to a position length facing the vicinity of the fixed end of the portion.
Since the lift amount in the vicinity of the fixed end of the portion of the discharge valve that can be deformed out of the plane is small, a large amount of gas cannot be expected to flow out from the portion of the long hole facing the portion near the fixed end. Therefore, it is appropriate to reduce the width of the long hole from the position facing the distal end portion of the part that can be deformed out of plane of the discharge valve toward the position length facing the vicinity of the fixed end of the part.

In the present invention, the gas in the cylinder bore flows out of the cylinder bore through the first discharge hole and the second discharge hole. If the sum of the opening area of the first discharge hole and the opening area of the second discharge hole is made larger than the conventional one, an increase in the discharge gas flow rate is suppressed even when the discharge gas flow rate is large, and the gap between the discharge valve and the valve plate is suppressed. An increase in flow resistance of the flow path formed in the cylinder is suppressed, gas outflow from the cylinder bore is promoted, an increase in gas pressure in the cylinder bore is suppressed, and a reduction in efficiency of the compressor is suppressed. The biasing force of the gas applied to the out-of-plane deformable part of the discharge valve is distributed between the tip of the part and the vicinity of the fixed end. An increase in speed is suppressed, and an increase in noise when the discharge valve collides with the retainer when the valve is opened is suppressed.

  A swash plate compressor according to an embodiment of the present invention will be described.

As shown in FIG. 1, a front housing 2 and a cylinder head 3 are disposed so as to cover both ends of a columnar cylinder block 1. A crank chamber 4 is formed inside the front housing 2, and a plurality of cylinder bores 5 are formed inside the cylinder block 1 at intervals in the circumferential direction. A swash plate 6 is disposed in the crank chamber 4. A drive shaft 7 is inserted through the center of the swash plate 6. The drive shaft 7 is rotatably supported by the front housing 2 and the cylinder block 1 via a bearing (not shown).
A rotor 8 is fixed to the drive shaft 7. The rotor 8 is supported by the front housing 2 via a thrust bearing 9.
The swash plate 6 is connected to the rotor 8 via the link mechanism 10 so as to be capable of varying the tilt angle with respect to the drive shaft 7 and not to rotate relative to the rotor 8 around the drive shaft 7.

  A piston 12 is engaged with the swash plate 6 via a shoe 11. The piston 12 extends in parallel with the drive shaft 7 and is inserted into the cylinder bore 5 so as to be slidable back and forth.

A suction chamber 13 and a discharge chamber 14 are defined inside the cylinder head 3. A suction port 3 a formed in the cylinder head 3 communicates with the suction chamber 13. A discharge port (not shown) formed in the cylinder head 3 communicates with the discharge chamber 14.
A gasket 15 and a valve plate 16 are disposed between the cylinder block 1 and the cylinder head 3. The valve plate 16 is formed with a circular suction hole 16 a communicating with the cylinder bore 5 and the suction chamber 13, and circular first discharge holes 16 b and second discharge holes 16 c communicating with the cylinder bore 5 and the discharge chamber 14. ing. The valve plate 16 is equipped with a suction valve 17 that opens and closes the suction hole 16a on the side away from the suction chamber 13, and a discharge valve 18 that opens and closes the discharge hole 16b on the discharge chamber 14 side. The suction valve 17 and the discharge valve 18 are configured as strip-type reed valves that open and close the suction holes 16a and the discharge holes 16b and 16c by elastically deforming in the out-of-plane direction due to a pressure difference between inside and outside.

A retainer 19 that faces the valve plate 16 with the discharge valve 18 interposed therebetween and restricts the opening degree of the discharge valve 18 is disposed in the discharge chamber 14. The retainer 19 is bolted to the cylinder block 1. The retainer 19 cooperates with the valve plate 16 to clamp and fix the base portion of the partial discharge valve 18 and allows an out-of-plane deformation of a portion facing the discharge hole 16 b of the discharge valve 18.
The first discharge hole 16b faces the tip of the part of the discharge valve 18 that can be deformed out of plane, and the second discharge hole 16c faces the part near the fixed end of the part. The second discharge hole 16c is formed with a smaller diameter than the first discharge hole 16b.

The operation of the swash plate compressor according to this embodiment will be described below.
The drive shaft 7 is rotationally driven by an external drive source (not shown), and the swash plate 6 rotates as the drive shaft 7 rotates. As the swash plate 6 rotates, the piston 12 reciprocates in the cylinder bore 5. As the piston 12 reciprocates, the refrigerant gas flowing from the external refrigeration circuit through the suction port 3 a into the suction chamber 13 is sucked into the bore 5 through the suction hole 16 a and is compressed in the bore 5. The refrigerant gas pressure in the bore 5 rises, the tip of the part that can be deformed out of plane of the discharge valve 18 moves away from the valve plate 16, and the discharge holes 16b and 16c open. The opening degree of the discharge valve 18 is regulated when the tip of the part contacts the retainer 19. The pressurized refrigerant gas in the bore 5 passes through the discharge holes 16b and 16c, is guided to the part of the discharge valve 18 which is deformed out of the plane, and is discharged into the discharge chamber 14, and from the discharge chamber 14 through a discharge port (not shown). Outflow to external refrigeration circuit.

In the swash plate compressor according to this embodiment, the refrigerant gas in the cylinder bore 5 flows out of the cylinder bore 5 through the first discharge hole 16b and the second discharge hole 16c. If the sum of the opening area of the first discharge hole 16b and the opening area of the second discharge hole 16c is made larger than the opening area of the conventional discharge hole, an increase in the discharge gas flow rate is suppressed even when the discharge gas flow rate is large, An increase in flow resistance of the gas flow path formed between the discharge valve 18 and the valve plate 16 is suppressed, gas outflow from the cylinder bore 5 is promoted, an increase in gas pressure in the cylinder bore 5 is suppressed, and the compressor Efficiency reduction is suppressed. Since the urging force of the gas applied to the part of the discharge valve 18 that can be deformed out of the plane is distributed between the tip of the part and the vicinity of the fixed end, the valve of the discharge valve 18 is opened even when the discharge gas flow rate is large. An increase in hourly movement speed is suppressed, and an increase in noise when the discharge valve 18 collides with the retainer 19 when the valve is opened is suppressed.
Since the lift amount at the time of valve opening in the vicinity of the fixed end of the discharge valve 18 that can be deformed out of the plane is small, a large amount of gas cannot be expected to flow out from the second discharge hole 16c. Therefore, it is appropriate to make the opening area of the second discharge hole 16c smaller than the opening area of the first discharge hole 16b.

Instead of forming the first discharge hole 16b and the second discharge hole 16c, as shown in FIG. 2, the fixed end of the part from the position facing the tip of the part that can be deformed out of plane of the discharge valve 18 An elongated discharge hole 16b 'extending to a position facing the vicinity may be formed. The width of the discharge hole 16b 'decreases from the position facing the tip of the discharge valve 18 that can be deformed out of plane to the position facing the vicinity of the fixed end of the position.
In the swash plate compressor according to this embodiment, the refrigerant gas in the cylinder bore 5 flows out of the cylinder bore 5 through the discharge hole 16b 'formed as a long hole. If the opening area of the discharge hole 16b 'is larger than the opening area of the conventional discharge hole, an increase in the discharge gas flow rate is suppressed even when the discharge gas flow rate is large, and the discharge hole 18b is formed between the discharge valve 18 and the valve plate 16. An increase in flow resistance of the flow path is suppressed, gas outflow from the cylinder bore 5 is promoted, an increase in gas pressure in the cylinder bore 5 is suppressed, and a reduction in efficiency of the compressor is suppressed. Since the urging force of the gas applied to the part of the discharge valve 18 that can be deformed out of the plane is dispersed from the tip of the part to the vicinity of the fixed end, even when the discharge gas flow rate is large, the discharge valve 18 An increase in movement speed at the time of valve opening is suppressed, and an increase in noise when the discharge valve 18 collides with the retainer 19 at the time of valve opening is suppressed.
Since the lift amount in the vicinity of the fixed end of the portion of the discharge valve 18 that can be deformed out of the plane is small, a large amount of gas can be expected to flow out of the portion of the discharge hole 16b 'facing the fixed end of the portion. Absent. Therefore, it is appropriate to reduce the width of the discharge hole 16b 'from the position facing the tip of the discharge valve 18 that can be deformed out of plane toward the position length facing the vicinity of the fixed end of the position. .

  The present invention is not limited to a swash plate compressor, but a cylinder bore, a piston that reciprocates in the cylinder bore, a valve plate in which a discharge hole that guides the compressed fluid in the cylinder bore is formed, and a strip plate that opens and closes the discharge hole And a retainer that regulates the opening degree of the discharge valve. The retainer cooperates with the valve plate to clamp and fix the base of the discharge valve and to deform the portion facing the discharge hole of the discharge valve. The present invention can be applied to various reciprocating compressors configured to allow.

It is sectional drawing of the swash plate type compressor which concerns on 1st Example of this invention. FIG. 3 is a structural diagram of a swash plate compressor according to a second embodiment of the present invention. (A) is a fragmentary sectional view, (b) is a top view of a discharge hole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylinder block 2 Housing 3 Cylinder head 4 Crank chamber 5 Cylinder bore 6 Swash plate 12 Piston 13 Suction chamber 14 Discharge chamber 16 Valve plate 16a Suction hole 16b First discharge hole 16c Second discharge hole 16b 'Discharge hole 18 Discharge valve 19 Retainer

Claims (4)

A cylinder bore, a piston that reciprocates in the cylinder bore, a valve plate formed with a discharge hole that guides the compressed fluid in the cylinder bore to the outside, a strip-shaped discharge valve that opens and closes the discharge hole, and the opening of the discharge valve The retainer cooperates with the valve plate to pinch and fix the base of the discharge valve and to allow out-of-plane deformation of the portion facing the discharge hole of the discharge valve. A compressor characterized in that a first discharge hole facing a distal end portion of an outer deformable portion and a second discharge hole facing a portion near a fixed end of the portion are formed. The compressor according to claim 1, wherein an opening area of the second discharge hole is smaller than an opening area of the first discharge hole. A cylinder bore, a piston that reciprocates in the cylinder bore, a valve plate formed with a discharge hole that guides the compressed fluid in the cylinder bore to the outside, a strip-shaped discharge valve that opens and closes the discharge hole, and the opening of the discharge valve The retainer cooperates with the valve plate to pinch and fix the base of the discharge valve and to allow out-of-plane deformation of the part facing the discharge hole of the discharge valve. The discharge hole is out of the surface of the discharge valve. A compressor having a long hole extending from a position facing a distal end portion of a deformable portion to a position facing a vicinity of a fixed end of the portion. The width of the long hole decreases from a position facing the tip end portion of the discharge valve that can be deformed out of plane toward a position length facing the vicinity of the fixed end of the portion. Compressor.

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