JPS5943990A - Silencer of enclosed compressor - Google Patents

Abstract

PURPOSE:To simplify the constitution of an apparatus by integrally shaping a plurality of noise silencing chambers, throttle passages which communicate those chambers with each other and a flange into a plastic molded part, said flange serving as the rim of the plastic molded part. CONSTITUTION:An emission silencer 17 is formed by shaping noise silencing chambers 24-26 and throttle passages 27 and 28 integrally with a throttle- shaped plastic molded part 21, thereby eliminating the need for separate shaping of the throttle passages 27 and 28 which are in conventional case fabricated independently of the chambers. A flange part 29 as well as the noise silencing chambers 24-26 and the throttle passages 27 and 28 is also shaped integrally with the plastic molded part to provide the increased planeness through the rim of the plastic molded part 21 and enlarged joint area where the part 21 is brazed to a press punched part 15, whereby improving the joint strength. Since the emission silencer 17 may be composed of only two parts, that is, the press punched part 15 and the plastic molded part 21, the constitution of the silencer may be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a silencer for a hermetic compressor, and in particular,
The compressor discharge muffler is constructed by joining a flat press punched part and a drawn-shaped plastic molded part, and has good performance.
Another object of the present invention is to obtain an economical discharge muffler with a simple configuration.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

(1) is a hermetic compressor in which a compression element (3) is housed in the upper part of a hermetic case (2) and an electric element (4) is housed in the lower part. The compression element (3) includes a cylinder (7) fixed to the motor case (5) with a fixing bolt (6), a piston (8) that slides back and forth within the cylinder (7), and a cylinder (7). A suction valve OQ and a discharge hole θ are attached to the end face of the opening so as to close the opening and open and close the suction hole (9).
1) A valve seat plate 03 having a discharge valve (6) for opening and closing, and an extension (15a) of the press punched part aυ attached to the valve seat plate 01 via a gasket α→ to the cylinder (7) with bolts αOθQ. A substantially U-shaped pipe is fitted into the hole 08) provided in the extension part (15a) of the press punched part so as to communicate directly with the discharge muffler α installed on the end face of the cylinder (7). It consists of a communication pipe and a separate suction muffler integrally formed of synthetic resin.

Thus, the discharge silencer αη is constructed by joining a flat press punched part 0 and a drawn-shaped plastic molded part Qυ by brazing, and the press punched part a! The extension part (15a) of 51 is formed with a discharge hole (A) having a bridging part (A), while the plastic molded part Q0 has first, second and third silencing chambers (C)) KD. And this first sound deadening room (c)
and the second silencing chamber (c), and between the second silencing chamber (a) and the third silencing chamber KD (c).
and a flange portion (c) at the edge of this plastic molded part (al) are integrally formed. ζda) is a discharge silencer a″t
) is the discharge pipe attached to the

In the silencer for the hermetic compressor configured in this way, the discharge silencer Q7) is arranged in the first, second and third silencing chambers (C) (C) ( Since the throttle passage (e) and the throttle passage (c) are integrally formed, there is no need to separately create the throttle passage (which was conventionally formed as a separate part), and the silencing chamber (c) (c) Since the flange side port is integrally formed at the same time as (c) and the throttle passage @, the flatness at the edge of the plastic molded part Qυ and the low profile to the press punched part a frame are determined by the joining area at the time of joining. By increasing the joint strength, it is possible to improve the joint strength, and the discharge silencer aη can be connected to the press punched part θQ and the plastic molded part Q.
A rhino discharge muffler αη, which has good performance and is economical, has been obtained with a simple configuration because it does not require a two-part connection with the υ.

In addition, since the extension part (15a) of the press punched part H is provided with a discharge hole (c) having a bridge part (a), as shown in FIG. ) can be regulated by the bridging portion (a) by the thickness of the gasket α4, and there is no need for a special valve holder for the discharge valve (6), reducing the number of parts.

As described above, the present invention forms a discharge muffler by joining a flat press punched part and a drawn-shaped plastic molded part,
In a hermetic compressor in which this discharge muffler is attached to a cylinder via a gasket, a discharge valve, a valve seat plate, and a suction valve,
Since the plastic molded part is formed by integrally forming a plurality of silencing chambers, a throttle passage that communicates the silencing chambers, and a flange portion at the edge of the plastic molding part, it has good performance and is economical. It is possible to form a discharge muffler with a simple structure.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a hermetic compressor showing an embodiment of the present invention, Fig. 2 (A) and (B) are a plan view and front view of a discharge muffler, and Fig. (B) is a front view and bottom view of the press punched part, Figure 4 (A) and (B) are front and bottom views of the plastically formed part, and Figure 5 is A-A' in Figure 4 (B).
FIG. 6 is a sectional view showing the section, and FIG. 6 is a perspective view showing the assembled state of the valve device. (1)...Hermetic compressor, (7)...Cylinder, θ
・0...Suction valve, 0...Discharge valve, α cap...Valve seat plate,
(14)...Gasket, (10...Press punched part, a'7)--Discharge muffler, Q→--Plastic molded part, (A)...Bridging part, @...・Discharge hole, (goods) (
c) (e)...muffling chamber, rigid)...throttle passage, wire...
flange. Figure 1 Figure 2 Figure 3 (A) (B)

Claims (2)

[Claims] (1) A discharge muffler was formed by joining a flat press punched part and a drawn-shaped plastic molded part, and this discharge muffler was attached to a cylinder via a gasket, a discharge valve, a valve seat plate, and a suction valve. In the hermetic compressor, the plastic molded part is integrally formed with a plurality of silencing chambers, a throttle passage that communicates between the silencing chambers, and a flange portion at the edge of the plastic molded part. Features a silencer for hermetic compressors. (2) A silencer for a hermetic compressor, characterized in that a discharge hole having a bridging portion is provided in a flat press punched part.