JPH01244181A - Enclosed compressor - Google Patents

Abstract

PURPOSE:To control any vibration in an inlet muffler by forming a holding part, molded in a circular form, in an almost U-shaped holder tightly attached to the outside of a hermetically sealed vessel, and fixing the inlet muffler to this supporting part by means of welding. CONSTITUTION:A joint 2c of an inlet muffler 2 is made contact, as going along it, with a circular holding part 3b, circularly forming its rectangular part installed in each tip at both end pieces of an almost U-shaped holder 3 tightly attached to the outside of a hermetically sealed vessel 1, attaching it thereto along an edge of the circular holding part by means of welding. With this constitution, welding strength is increased, while exciting force per unit length of a weld from a compressor body becomes lessened and simultaneously vibration in both primary and secondary modes is hard to occur, so that any noise being produced out of the inlet muffler 2 is thus reducible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a suction 77 holding system for a hermetic compressor for compressing refrigerant.

[Conventional technology]

Fig. 9 is a front view showing a suction muffler holding system of a conventional hermetic compressor disclosed in, for example, Japanese Utility Model Application No. 57-120775. In Fig. 99, (1) is a compressor element (not shown). (2) is a cylindrical suction muff provided on the outside of this sealed container (1); (3)
is a substantially U-shaped support fitting fixed to the outer periphery of the airtight container (1), and (3a) is a projection protrusion provided at both ends of this substantially U-shaped support metal fitting. The projection is fixed by welding.

FIG. 10 is a plan view of essential parts of the conventional hermetic compressor shown in FIG. 9, showing a suction muffler fixing system. The suction muffler (2B) is welded and fixed to the approximately U-shaped support fitting (3) at two points, and has an integral structure with the compressor body.

Further, the suction muffler (2) is usually formed of a thin sheet metal material, and the inside thereof is hollow in order to reduce pressure pulsations of the gas sucked into the compressor.

[Problem to be solved by the invention]

As described above, the conventional suction muffler (2) is fixed, so the vibration of the main body during compressor operation is directly transmitted to the suction of the thin sheet metal through the two welding points (3a) and t- of the support fitting (3). Since the vibration was transmitted to the muffler (2) and the suction muffler (2) was excited in a pattern shown by the broken line in FIG. 11, the suction muffler (2) had the problem of becoming a source of noise.

This invention was made to solve the above-mentioned problems, and it is possible to increase the fixing strength of the suction muffler and suppress the vibration of the suction muffler.

The objective is to obtain a suction muffler fixing system that reduces noise during compressor operation.

[Means to solve the problem]

In the hermetic compressor according to the present invention, a suction muffler is welded and fixed to a support portion in which the ends of both end pieces of a substantially U-shaped support fitting are formed into arc shapes, which are fixed to the outside of a hermetic container.

[Effect]

In the suction muffler fixing method of this invention, the weld between the suction muffler and the substantially U-shaped support fitting is changed from conventional spot welding to line welding, which increases the strength of the weld.

The vibration from the compressor body transmitted through the approximately U-shaped support fitting has the same excitation force as before, but unlike conventional point vibration, the excitation force per unit length of the welded part is less. This makes it difficult for primary and secondary mode vibrations to occur, which has the effect of reducing noise generated from the suction muff.

[Embodiments of the invention]

Figures 1 to 3 show an embodiment of the hermetic compressor according to the present invention. In Figure 1, (11 to (3) are completely the same as the conventional example described above. (2
) is the upper muffler, and (2b) is the lower muffler.

(2c) is the joint portion, and (3b) is an arcuate support portion provided on both end pieces of the substantially U-shaped support fitting (3).

In the round can closed compressor constructed as described above, the suction muffler (2
) are brought into contact along the edge of the arc-shaped support part and fixed by welding.

Therefore, the welding strength increases from conventional spot welding to line welding, and while the excitation force from the compressor body remains the same as before, the excitation force per unit length of the welded part decreases, and the Since secondary mode vibrations are less likely to occur, this has the effect of reducing noise generated from the intake muffler (2).

In the above embodiment, the arcuate support part (b) of the substantially U-shaped support fitting (3) is formed from a rectangular plate, but it may have a shape other than a rectangle.

Figures 4 and 5 show other embodiments in which the suction muffler (2) is attached to the approximately U-shaped support fitting (3). (3C) is the oblique side. Figures 4 and 5
According to the figure, the suction muffler (2) and the arc-shaped support part (3b)
Since welding is performed at the oblique side part (3c), there is a dimensional tolerance in the fixing position of the joint part (2c) of the suction muffler (21) and the approximately U-shaped support fitting (3) to the airtight container (1). It is excellent in mass production.

(3d) is the support part (3b) of the approximately U-shaped support fitting (3).
(3e) is also an elongated notch (
3c).

According to FIGS. 6 to 8, the elongated hole (3d) or the elongated notch (5e) is welded to the suction muffler joint (2).
By adhering to c), the welding strength can be increased.

〔Effect of the invention〕

As described above, according to the present invention, approximately U is provided on the outside of the airtight container.
A suction muffler is inserted and fixed between both end pieces of the substantially U-shaped support metal fitting, and the substantially U-shaped support metal fitting is formed into an arc shape at the tips of both end pieces to form nine support parts. However, since the suction muffler is welded and fixed to this support part, it is possible to reduce noise generation due to the excitation force transmitted to the suction muffler, and it also has the effect of improving the strength of the suction muffler support part. play.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of essential parts showing an embodiment of the present invention. FIG. 2 is a plan view of the main part, FIG. 3 is a front view, a perspective view of the main part showing the fourth embodiment, and FIG. 8 is a front view of the same. FIG. 9 is a front view showing a conventional hermetic compressor, FIG. 10 is a top view of the main part thereof, and FIG. 11 is a folding diagram showing a conventional suction 77 vibration pattern. In the figure, (l) is a closed container, (2) is a suction muffler, and (3)
(3b) is a substantially U-shaped support fitting, and (3b) is an arc-shaped portion. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] In a hermetic compressor in which a substantially U-shaped support fitting is fixed to the outside of a closed container, and a suction muffler is inserted and fixed between both end pieces of this support fitting, the above-mentioned substantially U-shaped support fitting is formed into an arc shape at the tips of both end pieces. A hermetic compressor, characterized in that the suction muffler is fixed by welding to the supporting part.