JP2537495Y2 - Fluid suction and discharge device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fluid suction / discharge device that sucks and discharges a refrigerant by reciprocating a piston in a cylinder formed in a cylinder block, and particularly relates to a cylinder block and a cylinder head. With regard to the corrosion prevention of the valve plate portion arranged between the

[Prior Art] Generally, a fluid suction / discharge device called a swash plate type is known. In this type of fluid suction / discharge device, an inclined swash plate is attached to a shaft that is driven to rotate, and the rotation of the swash plate converts the rotational force into a reciprocating drive force. Reciprocating drive is used.

Further, as shown in FIG. 7, the suction port 11 formed corresponding to the cylinder 2 is provided on the end face of the cylinder block 1.
And a valve plate 10 having a discharge port 12. On one surface of the valve plate 10, a suction valve 13 for opening and closing the suction port 11 and a cylinder gasket 17 are arranged. On the other side of the valve plate 10, a discharge valve 20 for opening and closing the discharge hole 12 and a cylinder head gasket
22 is worshiped. Further, a cylinder head 30 having a partition wall 33 therein for partitioning the suction chamber 31 and the discharge chamber 32 and abutting on the cylinder gasket 17 is provided. Cylinder head 30 includes cylinder gasket 17, suction valve 1
3, together with the valve plate 10, the discharge valve 20, and the cylinder head gasket 22, are fixed to one end surface of the cylinder block 1.

The cylinder block 1 and the cylinder head 30 are made of aluminum light alloy for the purpose of weight reduction and have anticorrosion properties. However, since the valve plate 10 disposed between the cylinder block 1 and the cylinder head 30 is made of an iron-based material due to its function, some anticorrosion treatment is required. That is, when the valve plate 10 made of an iron-based material is exposed, red rust is generated, which causes a problem in appearance.

Conventionally, cylinder block 1, cylinder head 30,
The outer surface of the valve plate 10 is painted. That is, anticorrosion is performed by painting.

[Problem to be Solved by the Invention] Recently, there has been a problem of releasing Freon gas, which is generally used as a refrigerant in this type of fluid suction / discharge device, to the atmosphere. Therefore, application of various alternative refrigerants is being studied. When the type of refrigerant is changed, the type of refrigerating machine oil used inside the fluid suction / discharge device is also generally changed accordingly.

However, refrigeration oil suitable for R134a, which is considered as one of the alternative refrigerants, has the property of dissolving the coating on the outer surface of the fluid suction / discharge device, so that anticorrosion by coating is inappropriate.

Therefore, an object of the present invention is to provide a fluid suction / discharge device in which even if a valve plate is made of an iron-based material, anticorrosion is performed without applying special anticorrosion means to its surface.

[Means for Solving the Problems] According to the present invention, a cylinder block having a plurality of cylinders, a valve plate having a suction port and a discharge port formed corresponding to the cylinder, and one surface of the valve plate A suction valve disposed on the one surface of the valve plate, a cylinder gasket disposed on one surface of the valve plate, and a discharge valve disposed on the other surface of the valve plate for opening and closing the discharge hole; A cylinder head gasket disposed on a surface thereof, a partition partitioning into a suction chamber and a discharge chamber, and a partition wall abutting against the cylinder gasket therein, wherein the cylinder gasket, the suction valve, the valve plate, the discharge valve, the cylinder A fluid suction / discharge device having a head gasket and a cylinder head fixed to one end surface of the cylinder block. At least the outer diameter of the valve plate is slightly smaller than the outer diameter of the valve head, an annular ring is arranged on the outer periphery of the valve plate, and the annular ring is pressed and held between the cylinder head and the cylinder block. A fluid suction / discharge device is obtained in which the space between the cylinder head and the cylinder block is sealed by the annular ring.

Embodiment FIG. 1 and FIG. 2 show a swash plate type compressor as a fluid suction / discharge device according to an embodiment of the present invention. The same parts as those in FIG. 3 are denoted by the same reference numerals, and the description is omitted.

1 and 2, the cylinder block 1 and the cylinder head 30 are made of an aluminum light alloy for the purpose of weight reduction. The valve plate 10 is made of an iron-based material.

Further, the valve plate 10, the cylinder gasket 17, and the cylinder head gasket 22 are made smaller in diameter than the cylinder block 1 and the cylinder head 30. As a result, a ring-shaped shallow recess 34 is formed between the cylinder block 1 and the cylinder head 30.

An annular ring 36 is provided in the recess 34. The annular ring 36 is made of a material having elasticity, such as plastic rubber, and has a thickness substantially equal to the depth of the recess 34 and a width slightly larger than that of the recess 34. As a result, when disposed in the recess 34, the annular ring 36 is sandwiched between the cylinder block 1 and the cylinder head 30, and is in pressure contact with the cylinder block 1 and the cylinder head 30. Therefore, since the annular ring 36 has a sealing property against invasion of moisture from the outside, it is unnecessary to apply a coating for preventing the valve plate 10 from being corroded. In this state, a space 37 may be formed between the outer peripheral surface of the valve plate 10 and the annular ring 36.

The annular ring 36 may be made of another material, for example, a metal as long as the material does not rust.

3 and 4 show a swash plate type compressor as a fluid suction / discharge device according to another embodiment of the present invention. An annular ring 36 'in this swash plate compressor is formed by attaching a surface material 36'b having elasticity such as plastic rubber to a metal core 36'a, as shown in FIG. The structure is such that the cored bar 36'a is not exposed to the outside when it is mounted on the device.

Also, as shown in FIG. 6, the cylinder gasket 17 and the cylinder head gasket 22 are made to have the same diameter as the cylinder block 1 and the cylinder head 30, and an annular ring 36 is sandwiched between the cylinder gasket 17 and the cylinder head gasket 22. It may be.

[Effects of the Invention] As described above, according to the fluid suction / discharge device of the present invention, an annular ring is pressed and held between the cylinder head and the cylinder block, and the gap between the cylinder head and the cylinder block is held by the annular ring. Is sealed to prevent moisture from entering the periphery of the valve plate, so that even if the valve plate is made of an iron-based material, anticorrosion is performed without coating. Therefore, R134a is considered as one of the alternative refrigerants
It is also possible to easily use a refrigerating machine oil conforming to the above. Further, since the flatness of the valve plate is not reduced by the coating, the adhesion of the suction valve and the discharge valve to the valve plate is not deteriorated. In addition, since a costly process such as painting is not required, the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of only a main part of a swash plate type compressor as a fluid suction / discharge device according to an embodiment of the present invention, and FIG. 2 is A in FIG.
FIG. 3 is a sectional view of only a main part of a swash plate type compressor as a fluid suction / discharge device according to another embodiment of the present invention, FIG. 4 is an enlarged view of FIG. 3B, and FIG. FIG. 3 is a cross-sectional end view of an annular ring included in the swash plate compressor, FIG. 6 is a cross-sectional view of only a main part in still another embodiment of the present invention, and FIG. 7 is a conventional swash plate compressor. 3 is a sectional view of only a main part of FIG. 1 ... Cylinder block, 2 ... Cylinder, 10 ...
Valve plate, 11… suction port, 12… discharge port, 13… suction valve, 17
…… Cylinder gasket, 20 …… Discharge valve, 22 …… Cylinder head gasket, 30 …… Cylinder head, 31
... suction chamber, 32 ... discharge chamber, 33 ... partition wall, 34 ... recess,
36,36 '... Annular ring, 36'a ... Core, 36'b ...
... surface material, 37 ... space.

Claims (3)

(57) [Scope of request for utility model registration] 1. A cylinder block having a plurality of cylinders, a valve plate having a suction port and a discharge port formed corresponding to the cylinder, and a suction valve disposed on one surface of the valve plate for opening and closing the suction port. A cylinder gasket disposed on one surface of the valve plate, a discharge valve disposed on the other surface of the valve plate to open and close the discharge hole, and a cylinder head gasket disposed on the other surface of the valve plate. A partition partitioning into a suction chamber and a discharge chamber and having a partition wall in contact with the cylinder gasket therein, the cylinder gasket, the suction valve,
In a fluid suction and discharge device having the valve plate, the discharge valve, and a cylinder head fixed to one end surface of the cylinder block together with the cylinder head gasket, at least the outside diameter of the valve plate is larger than the outer diameters of the cylinder block and the cylinder head. The diameter is slightly reduced, an annular ring is arranged on the outer periphery of the valve plate, the annular ring is pressed and held between the cylinder head and the cylinder block, and the cylinder head and the cylinder head are fixed by the annular ring. A fluid suction / discharge device, wherein a space between the cylinder and the cylinder block is sealed. 2. The ring-shaped ring is made of a material having elasticity such as plastic rubber.
The fluid suction / discharge device according to any one of the preceding claims. 3. The fluid suction / discharge device according to claim 1, wherein the annular ring has a metal core inside the cross section, and an outer peripheral portion thereof is integrally formed of a material having elasticity.