JPH09242670A - Muffler for compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a muffler in which two container bodies are easily fixed to each other by a simple structure and the airtightness of a connecting part is excellent, in the noise eliminator formed by uniting two synthetic resin-made container bodies. SOLUTION: When the opening of a first container body 19 is fitted to the enlarged part 20 of a second container body 21, a space 25 is formed over the whole circumference of a connecting part. A filler hole for injecting an adhesive, which is communicated with the space 25, is arranged in the enlarged part 20. The first and second container bodies 19, 21 are formed of synthetic resins, and airtightly fixed to each other by injecting the adhesive from the filler hole and filling it into the space 25 of the connecting part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muffler used in a refrigerant compressor, and more particularly to a synthetic resin suction muffler which can supply a low-temperature refrigerant gas into a cylinder of a compressor and which is excellent in heat insulation.

[0002]

2. Description of the Related Art Generally, an intake silencer used in a refrigerant compressor is designed to prevent heating of refrigerant gas flowing into the silencer.
It is preferable to use a synthetic resin that is heat-insulating and lightweight. Such a silencer made of synthetic resin is disclosed in, for example, Japanese Patent Laid-Open No. 59-4.
As disclosed in Japanese Patent No. 3992, a container provided with a U-shaped communication tube and the other container are integrated by fitting their openings. The opening edge of one body is provided with an expanding portion into which the opening edge of the other body is inserted, and thermosetting is performed on the inner peripheral surface of the expanding portion and the outer peripheral surface of the opening edge of the other body. By applying the adhesive of and heating
The joint portion of both vessels is fixed.

As a method of fixing the connecting portion of the two bodies,
In addition to the method of applying the adhesive to the bonding surface as described above, ultrasonic welding or fixing by locking can be applied. In ultrasonic welding, a melting protrusion is provided at the joint portion, and one side is vibrated by ultrasonic waves to fix the protrusion by melting. In the method using the latch, the protrusions and recesses that engage with each other are provided in the coupling portion, and the latch is coupled.

[0004]

However, the above-described method of fixing the connecting portion of the two vessels has the following problems.

That is, in the method of applying the adhesive, the operation of applying the adhesive to the respective adhesive surfaces of the two bodies has to be done manually, which is difficult to automate.
There is a problem that it requires manpower. In addition, in the method using ultrasonic welding, it is necessary to provide a penetration protrusion and a brim for ultrasonic vibration at the joint, and in order to complete the airtightness of the joint, a complicated shape must be designed. I have to. Further, it is difficult to completely seal the joint portion by the method using the latch. If the airtightness of the connecting portion is poor, not only the performance as a muffling device is deteriorated, but also the oil in the closed container may be sucked.

The present invention provides a silencer in which two containers made of synthetic resin are united with each other, which can easily fix the two containers with a simple structure and which is excellent in airtightness at the joint portion. The task is to do.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to a silencer in which two synthetic resin vessels having openings are joined by fitting the openings into each other, and the joints are bonded with an adhesive. An expanding portion into which the opening peripheral edge of the other container is inserted is provided at the opening peripheral edge of the container body, and a space is formed over the entire circumference inside the expanding portion when the two container bodies are combined, and this space is It is characterized in that an injection hole for injecting a communicating adhesive is provided in the expanded portion. The space can be formed by the open end surface of one body, the inner peripheral surface of the expanded portion of the other body, and the peripheral surface of the partition plate arranged in the expanded portion to form the resonance silencing chamber.

In the muffler thus constructed, two synthetic resin vessels are united and temporarily assembled, and then the adhesive is injected from the injection hole to fill the space in the expanded portion, and both vessels are assembled. Is airtightly fixed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a hermetic reciprocating compressor in which the silencer of the present invention is incorporated. In the figure, 1
Is a hermetically sealed container, and houses the frame bodies 2 and 3 consisting of two parts, the compressor section 4 arranged on the upper side of the frame bodies 2 and 3, and the electric motor section 5 arranged on the lower side. . The compressor unit 4 and the electric motor unit 5 are elastically attached to the inner wall of the closed container 1 via a support device 6.

The electric motor unit 5 has a stator having windings wound therein, a rotor disposed inside the stator, and a rotor mounted in the center of the rotor and rotatable by a bearing of the frame body 2. It is composed of a supported rotating shaft.

The compressor unit 4 includes a cylinder 7, a piston 9 that reciprocates in the cylinder 7 by eccentric rotation of a crankpin 8 of a rotary shaft, a valve seat plate 10 provided on an end surface of the cylinder 7, and a valve for this valve. The cylinder head 11 is attached to the cylinder 7 via the seat plate 10. The valve seat plate 10 is formed with a suction hole for sucking the refrigerant gas into the cylinder 7 and a discharge hole for discharging the refrigerant gas compressed in the cylinder 7, and the reed valve for opening and closing each opening. Is provided. Cylinder head 11
A discharge silencer 12 into which the refrigerant gas discharged from the discharge hole of the valve seat plate 10 is introduced is provided in the. The discharge silencer 12 is a discharge pipe 14 provided in the closed container 1 via a connecting pipe 13.
It is connected to the.

Reference numeral 15 is a synthetic resin suction muffler according to the present invention, and an end of a communication pipe 16 thereof is attached to the cylinder head 11 so as to face a suction hole of the valve seat plate 10.
The intake tail pipe 17 of the intake silencer 15 is arranged in proximity to the opening thereof so as to face the opening of an intake pipe 18 provided in the closed container 1.

FIG. 2 is a view showing the suction silencer 15 with a part of the connecting portion cut away, and FIG. 3 is an enlarged view of the connecting portion. The intake silencer 15 includes a first body 19 having a communication pipe 16 and a tail pipe 17, and a second body 21 having an opening 20 at an opening.
Composed of and. Expanding portion 20 of second container 21
The stepped portion 22 is provided in this stepped portion, and the partition plate 23 is positioned and arranged on this stepped portion 22. The opening peripheral edge 24 of the first container 19 is inserted into the expanded portion 20 of the second container 21, and the opening end 30 of the first container 19 is abutted to fix the partition plate 23. The partition plate 23 is arranged between the first container body 19 and the second container body 21, and is divided into the first container body 19 and the second container body 21.
Of the second body 21 through the communication hole 23A.
A resonance silencing chamber is formed inside. In the state where the first container body 19 and the second container body 21 are combined, as shown in FIG. 3, the opening end face 30 of the first container body 19 over the entire circumference of the coupling portion,
Inner peripheral surface of the expanded portion 20 of the second container 21 and the partition plate 23
A space 25 is formed with the peripheral surface. In the expanded portion 20, two adhesive injection holes 26 communicating with the space 25 are formed at substantially opposite positions. An adhesive is injected from one of the injection holes 26, the space 25 is filled with the adhesive, and both containers 19,
The connection part of 21 is fixed. The other injection hole (not shown) serves as an air vent hole.

The adhesive is injected by fixing the silencer 15 temporarily assembled to the jig 27 by combining the first container 19 and the second container 21 as described above, as shown in FIG. Insert the pipe 29 from the adhesive pressure pump 28 into the injection hole 26 to
This is done by feeding the adhesive from No. 8. In this way, the adhesive can be filled into the space 25 of the joint portion by the adhesive pressure pump 28, so that the adhesive work which has conventionally been applied to the adhesive surface of the joint portion can be automated and the efficiency can be improved. Adhesion work can be done in a short time.

The muffler 1 assembled as described above
5 is a closed container 1 from an external refrigerant circuit via a suction pipe 18.
The refrigerant gas flowing therein is sucked from the suction tail pipe 17 arranged near the opening of the suction pipe 18. The refrigerant gas sucked from the suction tail pipe 17 passes through the inside of the first container 19 and flows into the cylinder 7 from the communication pipe 16 attached to the cylinder head 11 through the suction hole of the valve seat plate 10. . At this time, the sound is damped by the resonance silencing chamber formed in the second container 21 by the partition plate 23.

[0017]

As described above, according to the present invention, 2
In a muffling device in which two synthetic resin vessels are combined by fitting the openings thereof, a space is provided over the entire circumference of the coupling portion of the two vessels, and an injection hole communicating with this space is provided. Therefore, the bonding portion can be bonded by injecting the adhesive through the injection hole. Therefore, the use of an adhesive injection device or the like enables automation and improves productivity.

[Brief description of drawings]

FIG. 1 is a plan view showing a hermetic compressor in which a silencer of the present invention is incorporated.

FIG. 2 is a view in which a part of the silencer of the present invention is cut away.

FIG. 3 is a cross-sectional view of essential parts of a silencer of the present invention.

FIG. 4 is a diagram for explaining a bonding process of the silencer of the present invention.

[Explanation of symbols]

 15 Inhalation silencer 19 First body 20 Expanded portion 21 Second body 25 Space 26 Injection hole

Claims (2)

[Claims] 1. A silencer for a compressor in which two synthetic resin vessels having openings are joined together by fitting the respective openings, and the joints are bonded with an adhesive. An expanding portion into which the opening peripheral edge of the other container is inserted is provided on the peripheral edge, and when the two containers are combined, a space is formed over the entire circumference in the expanding part and communicates with this space. A silencer for a compressor, wherein an injection hole for injecting an adhesive is provided in the expanded portion. 2. A first container body made of synthetic resin having an opening, and a synthetic resin having an opening and an expanding portion into which the opening peripheral edge of the first container is inserted. Made second
And a partition plate which is positioned and arranged on a step provided in the expanded portion of the second container and whose peripheral edge is in contact with and fixed to the opening end face of the first container. Comprises the first
A space is formed by the open end surface of the container body, the inner peripheral surface of the expanded portion of the second container body, and the peripheral surface of the partition plate, and an injection hole for injecting an adhesive communicating with the space is formed. A silencer for a compressor, which is provided in the widened portion.