JPH03175174A - Valve device for reciprocating compressor - Google Patents

Abstract

PURPOSE:To improve suction efficiency and compression efficiency by constituting the device so that it has a recessed part on which a discharge valve seat is formed on the counterpiston side of the valve plate, and that it has at least two suction ports and also at least two discharge ports. CONSTITUTION:A valve plate 4 has two suction ports 2, and is provided with a forked suction reed valve 11 shaped to the contour of the suction ports 2. On the counterpiston side of the valve plate 4, a recessed part 21 on which a discharge valve seat is formed is provided, and to the recessed part 21, a stopper 23 for regulating the lift of a discharge reed valve 22 by which two discharge ports 3 are opened or closed is caulked and fixed by means of rivets 24. By this constitution, the clearance volume of the discharge ports 3 can be reduced, and by providing two suction ports 2, suction efficiency can be remarkably improved, and also by providing two discharge ports 3, the increase in the overcompression loss affecting the suction efficiency can be restrained, and a valve device improved in compression efficiency can be obtained.

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, compressor valve devices have undergone various improvements 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 bulging device, which is disclosed in Japanese Patent Application Laid-Open No. 178581/1983, will be described below with reference to the drawings.

Figure 4 is an assembled sectional view of a conventional valve device, and Figure 6 is a cross-sectional view of a conventional valve device.
6 is an exploded perspective view of the valve device shown in FIG. 4. FIG. 6 is an assembled sectional side view of the valve device shown in FIG. Reference numeral 1 denotes a valve device, which includes a valve plate 4 having a suction hole 2 and a discharge hole 3, a discharge reed valve 5 for opening and closing the offshore outlet 3, and a stopper 6 for regulating the lift amount of the discharge reed valve 5. It consists of a spring 7 and a keeper 8 that soften the impact when compressing liquid, and a pin 9 that is fixed to the valve plate 4 and locks each component. A suction reed valve 11. is provided at the open end of the cylinder 1o. Plate gasket 12, head gasket 13. It is fixed together with the cylinder head 14 by bolts (not shown).

The cylinder 10 has a piston 16 that reciprocates by a drive source of a motor (not shown).

With the above configuration, the refrigerant gas passes through the suction hole 2 of the valve plate 4 due to the reciprocating movement of the piston 16, and the refrigerant gas flows into the cylinder 1 due to the opening/closing movement of the suction reed valve 11.
0, is compressed in the cylinder 10, passes through the discharge hole 3 of the valve plate 4, and is discharged by the opening and closing movement of the discharge reed valve 6.

Problems to be Solved by the Invention However, in the above configuration, the clearance volume of the discharge hole 3 becomes large, causing re-expansion during the suction stroke and reducing suction efficiency. As an improvement, as shown in the airtight refrigeration compressor of JP-A No. 63-309787, a method has been taken to reduce the clearance volume by thinning the plate thickness at the discharge hole of the valve grate, but this method causes overcompression loss. is on the rise. This overcompression loss is the loss that occurs due to the pressure difference between the discharge reed valve 6, which opens when the inside of the cylinder 10 reaches a high pressure and exceeds the high pressure within a small range. It is. Furthermore, when the suction efficiency of the suction reed valve 11 was increased, overcompression loss also tended to increase. Therefore, even if the clearance volume is reduced and the suction efficiency of the suction reed valve 11 is improved, overcompression loss increases and compression efficiency cannot be improved.

In view of the above problems, the present invention provides a valve device for a reciprocating compressor that improves compression efficiency by improving suction efficiency and suppressing overcompression loss.

Means for Solving the Problems A valve device of the present invention to solve the above-mentioned problems has a recess in which a discharge valve seat is formed on the side opposite to the piston of the valve plate, and has two or more suction holes. In addition, the discharge hole is configured to have two or more discharge holes.

Function The present invention improves suction efficiency by providing two or more suction holes with the above-described configuration, and increases suction efficiency by reducing the clearance volume at the discharge hole, and has two or more discharge holes. By doing so, overcompression loss can be suppressed.

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 will be described using the same reference numerals, and parts that are the same in structure and operation will be omitted.

1 is an assembled sectional view of a palleg device according to an embodiment of the present invention, FIG. 2 is an assembled sectional side view of the valve device of FIG. 1, and FIG. 3 is an exploded perspective view of FIG. 1. The valve plate 4 has two suction holes 2, and is provided with a bifurcated suction reed valve 11 that follows the shape of the suction holes 2. Further, the valve plate 4 has a recess 21 on the side opposite to the piston 15 in which a discharge valve seat is formed.
1, a discharge reed valve 22 that opens and closes two discharge holes 3, and a stopper 2 that regulates the lift amount of the discharge reed valve 22.
3 is caulked and fixed with a rivet 24.

With the above configuration, the clearance volume at the discharge hole 3 can be reduced and the suction efficiency can be significantly improved by reducing the number of the suction holes to two. By doing so, it is possible to suppress an increase in overcompression loss due to improvement in suction efficiency.

Therefore, it is possible to provide a valve device with improved suction efficiency and compression efficiency by suppressing an increase in overcompression loss.

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 has two or more suction holes and two or more discharge holes. Therefore, by reducing the clearance volume at the discharge hole and having two or more suction holes, the F:J suction efficiency is improved, and by having two or more discharge holes, overcompression loss due to the improvement in suction efficiency can be reduced. It is possible to provide a valve device for a reciprocating compressor with improved compression efficiency.

[Brief explanation of drawings]

Fig. 1 is an assembled sectional view of a valve device for a reciprocating compressor according to an embodiment of the present invention, Fig. 2 is an assembled sectional side view of the valve device of Fig. 1, and Fig. 3 is an exploded view of Fig. 1. A perspective view, FIG. 4 is an assembled sectional view of the valve device of the slave reciprocating compressor, and FIG.
4 is an assembled cross-sectional side view of the valve device shown in FIG. 4, and FIG. 6 is an exploded perspective view of FIG. 4. 10...Cylinder, 16...Piston, 2...Suction hole, 3...Discharge hole, 21
...Recess, 4...Valve plate, 1
1... Suction reed valve, 22... Discharge reed valve.

Claims (1)

[Claims] a cylinder, a piston that reciprocates by transmitting a drive source, a valve plate fixed to the cylinder and having a suction hole and a discharge hole, and a recess in which a discharge valve seat is formed on the side opposite to the piston, and the suction hole. and a discharge reed valve that opens and closes the discharge hole.
A valve device for a reciprocating compressor, characterized in that the valve device is composed of more than one valve.