JPH1061554A - Valve device of compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve device having low cost and high reliability in a valve device of a compressor to be used for a cooling cycle. SOLUTION: A discharge read valve 21 provided with a bent part 21a is so arranged as to be pressed by a groove part 25a of a stopper 25 fixed on a valve plate 2 having such a shape as to be engaged with the bent part 21a, and therefore, low cost can be achieved without reducing the efficiency of a compressor, and high reliability can be realized by absorbing and reducing the unnecessary motion other than the opening and closing motion of the discharge read valve 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device for a compressor used in a refrigerating cycle of a home refrigerator or the like.

[0002]

2. Description of the Related Art In recent years, compressors have been required to have high efficiency, low cost, and high reliability in response to low power consumption.

A conventional valve device for a compressor is disclosed, for example, in Japanese Patent Application Laid-Open No. 3-25879.

A conventional compressor valve device will be described below with reference to the drawings. FIG. 3 shows an assembled sectional view of a conventional valve device for a compressor. Reference numeral 1 denotes a discharge reed valve, which is disposed in a recess 4 so as to open and close a discharge hole 3 provided in a valve plate 2. A stopper 5 is fixed to the valve plate 2 by a caulking pin 6 and presses the discharge reed valve 1 together with a spring 7. Reference numeral 8 denotes a cylinder, which holds the valve plate 2 together with a plate gasket 9, a suction valve 10, and a head gasket 11 by a cylinder head 12. A piston 13 reciprocates in the cylinder 8.

In the above construction, the refrigerant gas compressed in the cylinder 8 by the reciprocating motion of the piston 13 pushes up the discharge reed valve 1 through the discharge hole 3 and enters the cylinder head 12. And then to a refrigeration system (not shown). The maximum lift amount of the discharged reed valve 1 pushed up is regulated by the stopper 5, and the spring force of the spring 7,
The discharge hole 3 is closed again by the pressure difference between the cylinder 8 and the cylinder head 12.

[0006]

However, in the above configuration, in order to obtain stable valve characteristics, the discharge reed valve 1, the plate thickness and spring characteristics of the spring 7, and the concave portion 4 for determining the maximum lift amount are required. There is a problem that there are many manufacturing control items such as a step height and a step height of the stopper 5.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a discharge reed valve having the function of a spring, thereby reducing the compressor efficiency, facilitating assembly and reducing the cost, and using a stopper for the discharge reed valve. An object of the present invention is to provide a compressor valve device that can obtain high reliability by regulating unnecessary movements other than opening and closing movements.

[0008]

In order to solve the above-mentioned problems, a valve device for a compressor according to the present invention is provided so as to close a discharge hole formed in a valve plate and has a bent portion. A discharge reed valve, and a stopper disposed to regulate a lift amount of the discharge reed valve and press a bent portion of the discharge reed valve. The stopper is provided with a groove having a shape engaging with the curved portion.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a valve plate fixed to a cylinder and having a discharge hole in a concave portion, and a discharge plate disposed to close the discharge hole and having a bent portion. It has a reed valve and a stopper that regulates the lift amount of the discharge reed valve and is arranged to press down the bent part of the discharge reed valve. Have.

According to a second aspect of the present invention, there is provided a valve plate fixed to a cylinder and having a discharge hole in a concave portion,
A discharge reed valve having a bent portion disposed so as to close the discharge hole, and a groove having a shape engaged with the bent portion that regulates a lift amount of the discharge reed valve and restricts a position of the discharge reed valve. It has a stopper disposed so as to press the bent portion of the discharge reed valve, and has an effect of restricting unnecessary movement of the discharge reed valve in addition to the function according to the first aspect.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same parts as those in the conventional example will be described using the same reference numerals.

(Embodiment 1) FIG. 1 shows a first embodiment of the present invention.
FIG. 3 is an assembled sectional view of a valve device of a compressor according to the first embodiment.
In the figure, reference numeral 21 denotes a discharge reed valve having a bent portion 21a, which is disposed in the recess 4 so as to open and close a discharge hole 3 provided in the valve plate 2. 5 is a stopper, which is fixed to the valve plate 2 by a caulking pin 6,
The discharge reed valve 21 is provided so as to press the bent portion 21 a of the discharge reed valve 21. Reference numeral 8 denotes a cylinder, which is used to connect the valve plate 2 to a plate gasket 9, a suction valve 10, and a head gasket 1.
1 together with the cylinder head 12. A piston 13 reciprocates in the cylinder 8. The operation of the valve device of the compressor configured as described above will be described below.

The reciprocating motion of the piston 13 causes the cylinder 8
The refrigerant gas compressed therein pushes up the discharge reed valve 21 through the discharge hole 3, flows into the cylinder head 12, and then flows to the refrigeration system (not shown). The maximum lift amount of the pushed-up discharge reed valve 21 is regulated by the stopper 5, and the discharge hole 3 is closed again by the spring force generated at the bent portion 21a and the pressure difference between the cylinder 8 and the cylinder head 12.

(Embodiment 2) FIG. 2 shows a second embodiment of the present invention.
FIG. 3 is an assembled sectional view of a valve device of a compressor according to the first embodiment.
In the figure, reference numeral 21 denotes a discharge reed valve having a bent portion 21a, which is disposed in the recess 4 so as to open and close a discharge hole 3 provided in the valve plate 2. Reference numeral 25 denotes a stopper having a groove 25a shaped to engage with the bent portion 21a. It is arranged. Reference numeral 8 denotes a cylinder, which holds the valve plate 2 together with a plate gasket 9, a suction valve 10, and a head gasket 11 by a cylinder head 12. A piston 13 reciprocates in the cylinder 8. The operation of the valve device of the compressor configured as described above will be described below.

The reciprocating motion of the piston 13 causes the cylinder 8
The refrigerant gas compressed therein pushes up the discharge reed valve 21 through the discharge hole 3, flows into the cylinder head 12, and then flows to the refrigeration system (not shown). The maximum lift amount of the pushed-up discharge reed valve 21 is regulated by the stopper 25, and closes the discharge hole 3 again due to its own spring force and the pressure difference between the cylinder 8 and the cylinder head 12. At this time, the discharge reed valve 21 is slightly twisted or displaced by the collision at the time of closing. By reducing the movement other than the opening and closing movement of the discharge reed valve 21 by the bent portion 21a and the groove portion 25a, stable valve characteristics can be maintained for a long period of time.

[0016]

As described above, according to the present invention, a bent portion is provided in the discharge reed valve, and the bent portion is held down by the stopper.
Cost reduction can be achieved without reducing compressor efficiency. In addition, the stopper is provided with a groove that engages with a bent part that regulates the position of the discharge reed valve, and by pressing the bent part here, in addition to the above effects, unnecessary movement of the discharge reed valve can be regulated, and high reliability Sex can be obtained.

[Brief description of the drawings]

FIG. 1 is an assembled sectional view of an embodiment of a valve device for a compressor according to claim 1 of the present invention.

FIG. 2 is an assembled sectional view of an embodiment of a valve device for a compressor according to claim 2 of the present invention.

FIG. 3 is an assembled sectional view of a conventional valve device of a compressor.

[Explanation of symbols]

 Reference Signs List 21 discharge reed valve 21a bent portion 2 valve plate 3 discharge hole 4 concave portion 25 stopper 25a groove 6 caulking pin 8 cylinder 9 plate gasket 10 suction valve 11 head gasket 12 cylinder head 13 piston

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tomio Maruyama 4-5-2-5 Takaidahondori, Higashiosaka City, Osaka Inside Matsushita Refrigeration Co., Ltd.

Claims (2)

[Claims] 1. A valve plate fixed to a cylinder and having a discharge hole in a concave portion, a discharge reed valve having a bent portion disposed to close the discharge hole, and regulating a lift amount of the discharge reed valve. And a stopper disposed so as to press a bent portion of the discharge reed valve. 2. A valve plate fixed to a cylinder and having a discharge hole in a concave portion, a discharge reed valve arranged to close the discharge hole and having a bent portion, and a lift amount of the discharge reed valve is regulated. And a stopper provided with a groove having a shape engaging with the bent portion for pressing the bent portion of the discharge reed valve and for regulating the position of the discharge reed valve.