JPS586071B2 - How to make a compressor silencer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a silencer for a compressor.

A method of manufacturing a conventional silencer for a compressor will be explained with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a hermetic electric compressor, which includes a frame 3 elastically supported within a hermetic container 2, a compression mechanism such as cylinders 4 and 5 attached to the upper part of the frame 3, and a compression mechanism attached to the lower part of the frame 3. The compression mechanism section and the electric motor section 6 are interlocked by a rotating shaft 7.

8 is a suction valve, 9 is a valve seat, 10 is a discharge valve, and 11 is a joint seat.

The valve seat cover 12 is attached to the top of the cylinder 4, and covers the suction valve 8 and the valve seat 9.
, the discharge valve 10, and the joint seat 11, and are fastened with screws or the like.

The valve seat cover 12 is manufactured as shown in FIG.

FIG. 2 1 is an exploded view of the valve seat cover 12, and FIG. 2 2 is a view of the completed assembly.

A cover 12b formed by drawing a part of a steel plate is brought into contact with one side of a substrate 12a formed by pressing a steel plate, and a suction muffler 12C and a discharge muffler 12d made of a drawn steel plate are brought into contact with the opposite side of the cover, respectively. The suction pipe 12e1 and the discharge pipe 12f are connected to the ends of the silencers 12c and 12d.

After the parts are temporarily assembled by resistance welding at their abutting parts, the abutting parts are sealed and fixed by copper brazing.

As a result, when the compression mechanism section operates, gas passes from the suction pipe 12e, through the suction muffler 12c, from the suction gas passage 12g, further through the piston top volume section (not shown), through the discharge valve chamber 12h, and is discharged. Silencer 12d1
It is discharged to the discharge pipe 12f.

However, since the conventional manufacturing method of the silencers 12c and 12d uses resistance welding for temporary assembly, welding spatters may adhere to the snow surface or oxides may be generated.

For this reason, there was a defect in that the contact portion could not be completely sealed in the next brazing operation.

In addition, although the board 12 can be formed by efficient steel plate press processing, the temporary assembly requires manual or semi-automated, inefficient resistance welding, resulting in very low productivity as a whole. .

The present invention has been made in an attempt to eliminate such deficiencies.

In the present invention, the base plate 21 to be attached to the top of the cylinder 4 is formed by press punching from a steel plate, a plurality of protrusions 21c are partially press-molded on the base plate 21, and a silencer 23, 24 is attached to the protrusion 21c. Manufacturing of a silencer for a compressor in which the side surfaces of the opening end are press-fitted and temporarily assembled, and then the contact surfaces between the substrate 21 and the opening end surfaces of the silencers 23 and 24 are sealed and fixed by copper brazing. It's in the method.

That is, since the substrate 21 to be attached to the top of the cylinder 4 is formed by press cutting from a steel plate, the substrate 21 is attached to the top of the cylinder 4.
High productivity can be obtained.

A plurality of protrusions 21C are partially press-molded on the substrate 21, and the side surfaces of the open ends of the silencers 23 and 24 are press-fitted into the protrusions 21c for temporary assembly, so that the processing and assembly speed for the temporary assembly can be reduced. It is possible to match the manufacturing speed of the substrate 21.

In this case, since the plurality of protrusions are partially press-molded, the amount of deformation of the substrate 21 is small and the function of the substrate 21 is not impaired.

Furthermore, since the abutting surfaces of the substrate 21 and the open end surfaces of the mufflers 23 and 24 are sealed and fixed by copper brazing, a muffler with the same performance as the conventional one can be obtained.

Therefore, according to the present invention, it is possible to significantly improve the productivity of the silencer.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 5.

The members constituting the valve seat cover include a substrate 21, a cover 22 having a drawn portion forming a suction gas flow path 22a1 and a discharge valve chamber 22b, a suction muffler 23, a discharge muffler 24, and a straight pipe-shaped suction They are a pipe 25, a discharge pipe 26, and a rod-shaped rivet 27.

The difference between the board 21 and the conventional board is that there is a hole 21a in which the suction pipe 25 is engaged and a hole 2 in which the rivet 27 is engaged.
lb has been newly punched out, and the cover 22 also has a suction pipe locking hole 22c1 and a rivet locking hole 22.
A hole d is opened at a position corresponding to the hole in the substrate 21.

Further, a plurality of protrusions 21c having a continuous metal structure are formed in a part of the substrate 21 by pressing into a circular shape by half the thickness of the protrusion 21c.

These substrate 21, cover 22, etc. are assembled as shown in FIGS. 1 and 2.

The board 21 and cover 22 are brought into contact with each other, and the pipe locking hole 21a,
After inserting the suction pipe 25 into the suction pipe 22c, the bead portion 25a is formed so as to sandwich the substrate 21 and the cover 22 by pressing both end surfaces of the suction pipe 25.
22 is tightly fixed.

Further, after inserting the rivet 27 into the rivet locking holes 21b and 22d on the other side, both end surfaces of the rivet 27 are pressed to tighten the substrate 21 and the cover 22 and fix them tightly.

Next, the inner surfaces of the suction muffler 23 and the discharge muffler 24 are locked to a protrusion 21c provided on the substrate 21 on the side opposite to the cover by press fitting.

In this way, the board 21, the cover 22 and the silencer 23.2
Temporary assembly with 4 is completed.

Note that a discharge pipe 26 is attached in advance to the tip of the discharge muffler 24.

After the temporary assembly is completed, each contact surface is sealed and fixed with copper solder.

This allows it to function as a valve seat cover.

That is, gas is sucked in from the suction pipe 25, passes through the suction muffler 23, is further guided into the cylinder from the suction gas flow path 22a of the cover 22, then passes through the discharge valve chamber 22b1 and the discharge muffler 24, and then passes through the discharge pipe. 26.

Note that the parts not shown in FIGS. 3 to 5 are the same as the conventional one.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional hermetic electric compressor, Figure 2 1 is an exploded perspective view of the valve seat cover components used in the same compressor, and Figure 2 2 is a temporary view of the valve seat cover components used in the same compressor. FIG. 3 is an exploded perspective view of the components of the valve seat cover according to the present invention, and FIGS. 4 1 and 2 are cross-sectional views of the valve seat cover components in a temporarily assembled state. 21... Board, 21a... Suction pipe locking hole, 21b...
...Rivet locking hole, 21c...Protrusion, 22...Cover,
22a...Suction gas flow path, 22b...Discharge valve chamber, 22c
...Suction pipe locking hole, 22d...Rivet locking hole, 2
3... Suction muffler, 24... Discharge muffler, 25... Suction pipe, 25a... Bead portion, 26... Discharge pipe, 2
7...Rivet.

Claims (1)

[Claims] 1. A substrate 21 to be attached to the top of the cylinder 4 is press-cut from a steel plate and formed, and a plurality of protrusions 21c are partially press-molded on this substrate 21.
The compressor is temporarily assembled by enlarging the side surfaces of the opening ends of the silencers 523 and 24, and then sealing and fixing the contact surfaces of the substrate 21 and the opening ends of the silencers 23 and 24 with copper brazing. How to make a silencer.