JPH05164050A - Compressor - Google Patents

Abstract

PURPOSE:To prevent fixed side stress concentration of a delivery valve, and also simplify an installation work. CONSTITUTION:A delivery valve device 18 is composed of a delivery valve 20 arranged in a recess place 19 of a valve seat 15 and a backer valve sheet 21 which holds this delivery valve 20 and is also sandwiched between the valve seat 15 and a cylinder head 16. A valve holding piece 28 to hold elastically an engaging piece 24 of the delivery valve 20 and a valve regulating piece 29 to regulate opening of a valve piece 26 by bending an intermediate part so as to be brought into contact with this valve piece 26, are formed integrally in this backer valve sheet 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor for regulating a discharge valve.

[0002]

2. Description of the Related Art A conventional compressor is, for example, Japanese Utility Model No. 2-259.
It is configured as shown in Japanese Patent Publication No. 86. Here, a conventional example will be described with reference to this publication. In FIG. 5, a valve seat 50 is provided with a discharge port 51. A discharge valve 52 opens and closes the discharge port 51, and this discharge valve is formed of a thin metal plate. Reference numeral 53 is a backer valve that controls the opening of the discharge valve 52, and this backer valve is formed of a thick metal plate. Reference numeral 54 designates the valve seat 5 by overlapping the discharge valve 52 and the backer valve 53.
It is a bolt to be attached to 0.

In the discharge valve device having this structure, the opening degree by opening and closing the discharge valve 52 is regulated by the backer valve 53.

[0004]

However, the conventional discharge valve 52 is a backer valve 5 formed of a thick metal plate.
Since it is fixed to the valve seat 50 with the bolts 3 together with 3, the stress acts on the fixed side during the opening / closing operation, which causes problems such as damage to the valve and a large number of man-hours for mounting.

The present invention solves the above problems,
While reducing the stress generated on the fixed side of the discharge valve,
An object of the present invention is to provide a compressor that improves the assemblability of a discharge valve device.

[0006]

The present invention comprises a piston and
A cylinder on which this piston slides, a valve seat that seals the open end of this cylinder, a suction valve device that is mounted on the cylinder side of this valve seat, and a discharge valve device that is mounted on the opposite cylinder side of the valve seat. In a compressor provided with a cylinder head fixed to a cylinder via a valve seat so as to cover the discharge valve device, a discharge valve fitted with the discharge valve device in a recess provided in the valve seat, A valve holding piece which holds this discharge valve and which is held between the valve seat and the cylinder head and which elastically holds the discharge valve on this backer valve seat, and a contact with the discharge valve. And a valve regulating piece for regulating the opening of the discharge valve.

[0007]

The present invention is constructed as described above,
While holding the discharge valve, a valve holding piece and a valve restricting piece are formed on the backer valve seat that is sandwiched between the valve seat and the cylinder head to improve the work of mounting the discharge valve and to fix it on the fixed side when opening and closing. In addition to suppressing the concentration of stress on the valve, the noise of hitting the valve regulating piece of the discharge valve can be reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a hermetic compressor showing an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a state where the discharge valve and the suction valve are attached to the valve seat. FIG. 3 is a plan view showing a state in which the discharge valve device is attached to the valve seat. FIG. 4 is a sectional view taken along the line AA of FIG.

Reference numeral 1 denotes an airtight container, in which a frame body 2 and 3 consisting of two parts, a compression element 4 arranged on the upper side of the frame body, and an electric element 5 arranged on the lower side thereof. It is stored. The compression element 4 and the electric element 5 are elastically attached to the inner wall of the closed container 1 via a support device 6.

The electric element 5 includes a stator 8 having a winding 7 therein, a rotor 9 arranged inside the stator, and a bearing 10 of the frame body 2 inserted in the center of the rotor 9. And a rotary shaft 11 which is supported by.

The compression element 4 includes a cylinder 12, a piston 14 which is fitted in a crank pin 13 of a rotary shaft 11 and reciprocally slides in the cylinder 12, a valve seat 15 provided on an end surface of the cylinder 12, and a valve seat. And a cylinder head 16 attached to the cylinder 12 via

A suction valve device 17 is attached to the valve seat 15 on the cylinder 12 side, and a discharge valve device 18 is attached to the cylinder head 16 side. The suction valve device 17 is formed in a seat shape having substantially the same size as the valve seat 15. The discharge valve device 18 includes a discharge valve 20 mounted in a recess 19 provided in the valve seat 15, and a backer valve seat 2 for holding the discharge valve 20.
It is composed of 1 and 1. The recess 19 has a first recess 22 and a second recess 23 that obliquely communicates with the center of the first recess 22 and has a plane formed in a substantially T shape. Also, the discharge valve 20
Is formed in the same shape as the recess 19, and the engagement piece 24 fitted in the first recess 22 and the valve seat 15 in the second recess 23 are provided.
And a valve piece 26 for opening and closing the discharge hole 25 provided in the. The engagement piece 24 of the discharge valve 20 has a valve piece 2
Notches 27, 27 are provided on both sides of 6. The backer valve seat 21 has valve holding pieces 28, 28 for elastically pressing the engagement piece 24 of the discharge valve 20 in the second recess 23.
And a valve regulating piece 29 that is provided between these valve holding pieces and regulates the opening degree of the valve piece 26 is integrally formed. The valve restricting piece is formed with a protruding portion 30 which is bent at an intermediate portion and protrudes downward. The protrusion contacts the valve piece 26 of the discharge valve 20. The protruding portion 30 is separated from the contact portions of the valve holding pieces 28, 28 by a distance L. The pressing force applied to the discharge valve 20 is the valve holding pieces 28, 2
The protruding portion 30 is smaller than that in FIG.

The backer valve seat 21 is clamped between the cylinder head and the valve seat by fixing the cylinder head 16 to the cylinder 12 with bolts 31.

In the compressor thus constructed, the discharge valve 20 has the engagement piece 24 in the first recess 22 of the recess 19 of the valve seat 15 and the valve piece 26 in the second recess 23. Are engaged and closed with the engaging piece 24 serving as a fulcrum. The backer valve seat 21 is sandwiched between the valve seat 15 and the cylinder head 16, and the discharge valve 20 elastically holds the engagement piece 24 by the valve holding pieces 28, 28, so that the inside of the first recess 22 is closed. The engagement piece 24 can be prevented from being twisted and damaged.

Further, the valve restricting piece 29 of the backer valve seat 21 has a protruding portion 30 which comes into contact with the discharge valve 20 at an intermediate portion.
Is provided, the rigidity of the discharge valve 20 is increased so that the discharge valve does not open and close while being deformed into a waveform. Therefore, the discharge valve 20 can reduce the noise generated by continuously striking the valve regulating piece 29.

The backer valve seat 21 has a space L between the valve holding pieces 28, 28 and the protrusion 30 of the valve regulating piece 29.
By elastically holding the discharge valve 20 apart from each other,
The stress concentration on the side serving as the fulcrum of the opening / closing operation of the discharge valve 20 can be relaxed. Further, the protrusion 30 of the valve regulating piece 29 is located at the contact portion of the valve holding pieces 28, 28 with respect to the discharge valve 2
By reducing the pressing force to 0, the stress on the fixed side of the discharge valve 20 can be dispersed. That is,
The discharge valve 20 has a protrusion 30 of the valve piece 26 from the engagement piece 24.
The fixed side up to the contact area with and is gently pressed, so that stress is not locally concentrated.

[0018]

As described above, according to the present invention, the piston, the cylinder on which the piston slides, the valve seat that seals the open end of the cylinder, and the suction valve mounted on the cylinder side of the valve seat. A discharge valve device mounted on the opposite side of the valve seat from the cylinder side; and a cylinder head fixed to the cylinder via a valve seat so as to cover the discharge valve device. The device is composed of a discharge valve fitted in a recess provided in the valve seat and a backer valve seat that holds this discharge valve and is sandwiched between the valve seat and the cylinder head. Since the valve holding piece that elastically holds the discharge valve and the valve restricting piece that has the bent portion that comes into contact with the discharge valve and restricts the opening degree of the discharge valve are provided, the cylinder head and the valve seat are provided. Sandwiched between The discharge valve in the backer valve seat can be held resiliently, mounting operation of the discharge valve device can be to allow easy. Moreover, according to the present invention, the discharge valve is elastically held by the valve holding piece and the valve regulating piece of the backer valve seat, so that stress concentration at the time of opening and closing the discharge valve can be alleviated.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a hermetic compressor showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a state in which a discharge valve and a suction valve are attached to the valve seat of the present invention.

FIG. 3 is a plan view showing a state in which a discharge valve device is attached to the valve seat of the present invention.

4 is a cross-sectional view taken along the line AA of FIG. 3 of the present invention.

FIG. 5 is a sectional view of a conventional discharge valve device.

[Explanation of symbols]

 12 cylinder 14 piston 15 valve seat 16 cylinder head 17 suction valve device 18 discharge valve device 19 recess 20 discharge valve 21 backer valve seat 28 valve holding piece 29 valve regulating piece

Claims (1)

[Claims] 1. A piston, a cylinder on which the piston slides, a valve seat that seals the open end of the cylinder, a suction valve device mounted on the cylinder side of the valve seat, and an anti-cylinder side of the valve seat. In a compressor provided with a discharge valve device mounted on a cylinder head fixed to a cylinder via a valve seat so as to cover the discharge valve device, the discharge valve device is provided in a recess provided in the valve seat. A discharge valve fitted to the valve and a backer valve seat that holds the discharge valve and is sandwiched between the valve seat and the cylinder head. The backer valve seat elastically holds the discharge valve in the backer valve seat. A holding piece and a bent portion that comes into contact with the discharge valve,
A compressor provided with a valve regulating piece for regulating the opening of the discharge valve.