JPH03260382A - Valve device of reciprocating compressor - Google Patents

Abstract

PURPOSE:To improve volumetric efficiency by forming a recessed part, provided with a delivery valve seat in the end face of a valve plate, and also a notch in this recessed part, and fitting the protrusion of a delivery reed valve and the point end part of a stopper 24 to this notch to reduce the clearance volume. CONSTITUTION:In a valve device for a reciprocating compressor of relatively small size, a recessed part 21, provided with a delivery valve seat 20 in the end face in an opposite side to a piston 17 of a valve plate 4, is formed therein. A protrusion 23a of a delivery reed valve 23 for opening/closing a delivery hole 3 and a point end part 24a of a stopper 24 for restricting a lift amount of the delivery reed valve 23 are fitted to a notch 22 provided in this recessed part 21, and these protrusion and point end part are fixed by calking with a rivet 25. In this way, the delivery reed valve 23 can be positioned by the notch 22 even when the valve plate 4 is formed in small thickness in the delivery hole 3, so that it is surely opened and closed. Volumetric efficiency is improved by reducing the clearance volume.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a valve device for a relatively small reciprocating compressor used in household refrigerators and the like.

BACKGROUND OF THE INVENTION In recent years, various improvements have been made in compressor pulp apparatuses as compressors become more efficient, but even higher efficiency is desired from the standpoint of effective use of energy resources.

An example of a conventional pulping apparatus as disclosed in Japanese Patent Application Laid-Open No. 178581/1983 will be described below with reference to the drawings.

FIG. 3 is an assembled sectional view of a conventional valve device, and FIG. 4 is an exploded perspective view of the valve assembly and suction reed valve of the valve device of FIG. 3. A valve assembly 1 includes a valve plate 4 having a suction hole 2 and a discharge hole 3, and a valve plate 4 that opens and closes the discharge hole 3.
A set of discharge reed valves 5°6.7 and a set of discharge reed valves 5, 6.
The opening end of the cylinder 12 consists of a stopper 8 that regulates the amount of lift at the end of the cylinder, a spring 9 and a keeper 10 that soften the impact when compressing liquid, and a pin 11 that is fixed to the valve plate 4 and locks each component. Intake reed valve 13° plate gasket 14. The head gasket 15° is fixed together with the cylinder head 16 by bolts (not shown). Inside the cylinder 12 is a piston 17 that is reciprocated by a drive source of a motor (not shown).

According to the above structure, refrigerant gas is sucked into the cylinder 12 through the suction hole 2 of the valve plate 4 by the reciprocating movement of the piston 17, and is compressed into the cylinder 12 by the opening/closing movement of the suction reed valve 13. It has stable valve characteristics by passing through the discharge hole 3 of the discharge reed valve 5, 6.7 and being appropriately pressed by the combined spring force of the discharge reed valve 5, 6.7 to open and close it.

Problems to be Solved by the Invention However, with the above configuration, the clearance volume (volume remaining in the cylinder without being compressed and discharged) at the discharge hole 3 is large, and the volumetric efficiency is reduced due to re-expansion during the suction stroke. was decreasing.

Therefore, as shown in Japanese Unexamined Patent Publication No. 63-309787, a method has been adopted to reduce the clearance volume by thinning the plate thickness at the discharge hole 3 of the valve plate 4. The problem is that it is difficult to obtain sufficient strength and precision due to a decrease in strength and accuracy, and it is also difficult to configure a set of discharge reed valves 5, 6.7 as in the past, making it difficult to obtain stable valve characteristics. It had

The present invention solves the above-mentioned conventional problems.By reducing the clearance volume, the volumetric efficiency is improved, and the movement of the discharge reed valve is stabilized, so that the reciprocating compressor has valve characteristics with less variation. A valve device is provided.

Means for Solving the Problems In order to achieve this object, the valve device for a reciprocating compressor of the present invention has a recess in which a discharge valve seat is formed on the side opposite to the piston of the valve plate, and the valve device is provided in the recess. The projection of the discharge reed valve and the tip of the stopper fit into the notch, and the discharge reed valve and the stopper are fixed in the recess of the valve plate.

Effect of the Invention The present invention, with the above-described configuration, can reduce the plate thickness at the discharge hole, and by reducing the clearance volume, improves the volumetric efficiency in compression, and fixes the discharge reed valve and the stopper in the recess of the valve plate. As a result, the opening and closing movement of the discharge reed valve is stabilized, and therefore stable valve characteristics can be obtained.

EXAMPLE Hereinafter, a valve device according to an example of the present invention will be described with reference to the drawings. Note that parts that are the same as those in the conventional example are designated by the same reference numerals, and detailed explanation will be omitted.

FIG. 1 is an assembled side sectional view of a valve device according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the valve assembly and suction reed valve of the valve device of FIG. In the figure, the valve plate 4 has a discharge valve seat 2 on the side opposite to the piston 17.
0, and a notch 22 is provided in the recess 21 of the valve plate 4 to adjust the lift amount of the discharge reed valve 23 and the protrusion 23a of the discharge reed valve 23 that opens and closes the discharge hole 3. The discharge reed valve 23 and the stopper 24 are positioned by fitting the distal end portion 24a of the regulating stopper 24, and the discharge reed valve 23 and the stopper 24 are crimped into the recess 21 of the valve plate 4 with a rivet 25. Fixed.

In the above configuration, even if the plate thickness at the discharge hole 3 is made thinner, the discharge reed valve 23 can be positioned to reliably open and close the discharge hole 3. Further, the discharge reed valve 23 is reliably pressed against the recess 21 of the valve plate 4 together with the stopper. Therefore, it is possible to reduce the clearance volume, improve volumetric efficiency during compression, and obtain stable valve characteristics. In addition, the number of parts can be significantly reduced, resulting in cost reduction.

Effects of the Invention As described above, the present invention has a recess in which a discharge valve seat is formed on the side opposite to the piston of the valve plate, and a projection of the discharge reed valve and a stopper are formed in the notch provided in the recess of the valve plate. By fitting the tip and fixing the discharge reed valve and the stopper in the recess of the valve plate, the plate thickness at the discharge hole can be made thinner, and the volume during compression can be reduced by reducing the clearance volume. It is possible to create a reciprocating compressor pulp device that improves efficiency and has stable pulp characteristics because the discharge reed valve is always pressed against the discharge valve seat of the valve plate to ensure reliable opening and closing movement. can.

[Brief explanation of drawings]

1 is an assembled side sectional view of a pulp device of a reciprocating compressor according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the valve assembly and suction reed valve of the pulp device of FIG. 1, and FIG. The figure is an assembled sectional view of a pulp device of a conventional reciprocating compressor.
The figure is an exploded perspective view of the pulp assembly and suction reed valve of the pulp apparatus of FIG. 3. 3...Discharge hole, 4...Valve plate, 12...Cylinder, 17...Piston, 20...Discharge valve seat, 21 ...Recess, 22 ...Notch, 23 ...Discharge reed valve, 23a ...Protrusion, 24 ...Stopper, 24a. ...Tip. No. 1: ノ＼°? Cylinder height 0 STONO Wt output 4?

Claims (1)

[Claims] a cylinder, a piston that reciprocates by transmitting a drive source, a valve plate fixed to the cylinder and having a discharge hole and a recess in which a discharge valve seat is formed on the side opposite to the piston, and a protrusion; It has a discharge reed valve that opens and closes a discharge hole, and a stopper that has a tip and regulates the amount of lift of the discharge reed valve, and a projection of the discharge reed valve is inserted into a notch provided in a recess of the valve plate. A valve device for a reciprocating compressor, wherein the discharge reed valve and the stopper are fixed in a recess of the valve plate.