JPS63176677A - Muffler for compressor - Google Patents

Abstract

PURPOSE:To improve workability, by integrally forming protrusive pieces respectively in two silencer structures, which form a silencer, to be held between a delivery valve plate and a cylinder head. CONSTITUTION:A suction muffler 21 comprises a gas introducing port 22 and muffler structures 24, 26 forming protrusive pieces 23, 25 overhanging to the sideward in the vicinity of an opening. Both the protrusive pieces 23, 25, which are overlapped with each other so that the protrusive piece 23 of the muffler structure 24 is placed on the side of a delivery valve plate 17, are fixed by mounting bolts 20 for a cylinder head 19 or the like being held between the delivery valve plate 17 and the cylinder head 19. Accordingly, the silencer 21, performing its mounting work and connection of both the muffler structures simultaneously with mounting of the cylinder head or the like, enables the workability to be improved.

Description

Detailed Description of the Invention (a) Field of Industrial Application The present invention relates to a noise muffling device for a compressor, and more particularly, to a compressor silencer in which a synthetic resin suction muffler is attached to the side of a cylinder in a compressor body. Concerning a silencer for a machine.

(B) Prior Art Conventionally, in a silencer for a compressor that can be used in a refrigerator or the like, there has been one in which the suction silencer is made of a synthetic resin material. For example, as described in Japanese Utility Model Publication No. 61-24951 and shown in FIG.
The gas outlet pipe 42 is press-fitted into the hole 48 provided on the suction chamber 47 side of the cylinder head 46, and the mounting piece 43 is bolted. The suction muffler 4o is attached to the compressor main body 51 by being fixed to the wall surface of the cylinder 5o by means 49. The compressor with such a configuration has a suction muffler 40.
By forming the muffler with synthetic resin, the heat insulating properties of the muffler are improved, the heating of the suction gas flowing through the muffler is suppressed, and dense gas is supplied into the cylinder 50, increasing the refrigerating capacity. The compressor 40 is mounted on the side of the cylinder 50, which has a relatively empty space inside the closed case 52, thereby realizing a compact compressor.

(c) Problems to be Solved by the Invention However, according to the above configuration, when installing the suction silencer 40, the mounting piece 43 must be attached to the cylinder 50 with a separate bolt 49, which increases the number of parts and man-hours. The problem was that it was increasing. Further, as shown in FIG. 5, this type of compressor generally has a suction valve plate 53, a valve seat plate 54, and a discharge valve plate 55 on the open end surface of the cylinder 50.
, and the cylinder rad 46 are sequentially tightened with the bolts 56, so that the reed valve portion 57 of the discharge valve plate 55
It is necessary to separately attach a stopper (for regulating the lift amount), or to form a stopper 58 on the inner wall of the cylinder head 46 as shown in the figure, which raises the problem of increased manufacturing costs and complicated machining. In addition, since the reed valve portion 57 and the toss tube 58 are made of metal, there is a problem in that the contact noise becomes louder.

The present invention has been made in view of these points, and eliminates the conventional effects of making the suction muffler made of synthetic resin to increase the refrigeration capacity, and arranging the muffler on the side of the cylinder to make the compressor smaller. To provide a compressor with lower noise by reducing the number of parts and improving installation workability when installing a suction silencer, and by reducing contact noise between a reed valve part of a discharge valve plate and a stopper. The purpose of the present invention is to provide a compressor silencing device that is capable of

(d) Means for solving the problem The present invention provides a piston type compressor with a piston type compressor.
In a compressor in which a suction valve plate, a valve seat plate, a discharge valve plate, and a cylinder head are attached in this order with bolts, and a suction muffler made of synthetic resin is provided on the side of the cylinder, the suction The muffler is formed by butting a first container body and a second container body, and protrusions projecting outward in the same direction are integrally formed near the joint portions of the two container bodies.
A hole larger than the reed valve part of the discharge valve plate is formed in the protruding piece of the second vessel body, while a hole smaller than the hole in the protruding piece of the first vessel body is formed in the protruding piece of the second vessel body. A small hole communicating with the discharge chamber of the cylinder head is provided, and both of these projecting pieces are clamped and fixed between the discharge valve plate and the cylinder head with the bolts so that the projecting piece of the first body faces the discharge valve plate side. This is what I did.

(e) Function The compressor muffling device of the present invention has the above-described structure, which makes the suction muffler made of synthetic resin to improve the heat insulation properties of the muffler, and supplies high-density gas into the cylinder to increase the refrigerating capacity. The intake silencer is placed on the side of the cylinder to make effective use of the space inside the sealed case, contributing to the downsizing of the compressor. By clamping and fixing the protrusion between the discharge valve plate and the cylinder head, the joint between the two bodies can be brought into close contact without using any other adhesive means, and also without the use of separate bolts. The muffler can be mounted using bolts for mounting the valve seat plate and cylinder head, and the mounting work can be performed simultaneously with the assembly of the valve seat plate, cylinder head, etc. Further, a protruding piece of the first vessel body having a hole larger than the reed valve portion of the discharge valve plate and a protruding piece of the second vessel body having a small hole smaller than the hole are connected to the protruding piece of the first vessel body. Since the pieces are stacked on top of each other so that the two pieces are on the discharge valve plate side, a recess for accommodating the reed valve part can be formed on the discharge valve plate.
By using the bottom wall of the recess made of synthetic resin as a stopper for the reed valve part, the contact noise between the reed valve part and the stopper can be reduced, and a compressor with low noise can be obtained.

Kube) Example Embodiments of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a hermetic compressor in which a compressor main body 5 consisting of a compressor section 3 and an electric motor section 4 is housed in a hermetic case 2. The compressor section 3 includes a cylinder 7 mounted on a motor case 6 and a Scotch choke piston 8 that reciprocates within the cylinder, and has a reed valve section 9 and a discharge valve section on the open end surface of the cylinder 7. A suction valve plate 11 having a hole 10, a valve seat plate 14 having a suction hole 12 and a discharge hole 13, a discharge valve plate 17 having a suction hole 15 and a reed valve portion 16, a protruding piece of a suction muffler 21 to be described later, and The cylinder 19 defining only the gas discharge chamber 18 is fitted with bolts 20 in this order. Reference numeral 21 denotes an intake silencer made of a synthetic resin material such as polybutylene terephthalate.

This muffler includes a first body 24 that integrally forms a gas inlet 22 and a protrusion 23 that protrudes laterally near the opening, and a first body 24 that also includes a protrusion 25 that protrudes laterally near the opening. It is formed by overlapping the protrusions 23, 25 of these two vessels 24, 26 and joining their respective openings against each other. Here, the first vessel 2
The protruding piece 23 of No. 4 has a first hole 27 larger than the reed valve part 16 of the discharge valve plate 17, a second hole 28 that communicates with the suction hole 12 of the valve seat plate 14, and a second hole 28 that communicates with the suction hole 12 of the valve seat plate 14. A recess 29 is formed that communicates with the inside of the first container body 24. On the other hand, the protruding piece 25 of the second vessel body 26 has the protruding piece 23 of the first vessel body 24.
A third hole 30 is provided which extends through the first hole 27 and communicates the first hole with the discharge chamber 18 of the cylinder head 19 . That is, the suction muffler 21 connects the protrusions 23 and 25 of the first body 24 and the second body 26 to the first body 24 and the second body 26, respectively.
The discharge valve is stacked so that the projecting piece 23 of the vessel body 24 faces the discharge valve plate 17 side, and is clamped and fixed between the discharge valve plate 17 and the cylinder head 19 by the mounting bolts 20 of the cylinder head 19, etc. A recess 31 for accommodating the reed valve section 16 is formed on the plate 17, and a gas outlet passage section 32 for the muffler 21 is formed. 33 and 34 are a suction pipe and a discharge pipe fixed to the closed case 2.

In the hermetic compressor configured in this way, gas introduced into the hermetic case 2 from an external refrigerant circuit (not shown) via the suction pipe 33 is passed through the gas inlet 22 of the suction muffler 21.
After flowing into the muffler through the gas outlet passage section 3
2. Suction hole 15 of discharge valve plate 17, suction hole 1 of valve seat plate 14
2. It is sucked into the cylinder 7 through the reed valve portion 9 of the suction valve plate 11 and compressed. The compressed gas passes through the suction valve plate 1
1 discharge hole 10, discharge hole 13 of valve seat plate 14, discharge valve plate 1
After being completely discharged into the discharge chamber 18 of the cylinder head 19 through the reed valve portion 16 of No. 7, the first hole 27 and the third hole 30 of the protrusion, the refrigerant is discharged again to the external refrigerant circuit via the discharge pipe 34. ing.

Here, since the suction muffler 21 and its gas outlet passage 32, which constitute the gas suction path, are made of synthetic resin, their high heat insulation effect makes it possible to supply low-temperature, dense gas into the cylinder 7. It can improve the refrigeration capacity. Furthermore, since the suction muffler 21 is attached to the side of the cylinder 7, which has a relatively empty space within the sealed case 2, the compressor main body 5 can be assembled as compactly as possible, and a compact compressor can be provided. . Furthermore, inhalation silencer 2
1, the projecting pieces 23 and 25 integrally formed on the muffler are clamped and fixed between the discharge valve plate 17 and the cylinder head 19, so that the valve seat plate 14 and the cylinder head can be fixed without using any separate bolts. The muffler 21 can be firmly fixed by using the bolt 20 which is used in combination with the muffler 21.
The installation work can be performed simultaneously with the installation work of the valve seat plate 14 and the cylinder head 19. At this time, since the protrusions 23 and 25 forming the gas outlet passage 32 are strongly pressed in the stacking direction by the bolt 20, the sealing performance of the passage increases and gas does not leak. . In addition, since a recess 31 for accommodating the reed valve section 16 is formed on the side of the discharge valve plate 17 of the projections 23 and 25, the bottom wall 35 of this recess serves as a stopper for the reed valve section 16 (reed valve plate 17 side). A stopper made of synthetic resin softens the contact of the reed valve part 16 to reduce contact noise, thereby providing a compressor with low noise.

(G) Effects of the Invention As described above, the present invention makes the suction muffler made of synthetic resin to improve the insulation properties of the muffler, supplies dense gas into the cylinder, improves the refrigerating capacity, and improves the suction muffler. While maintaining the previous effect of arranging the muffler on the side of the cylinder to make effective use of the space inside the sealed case and making the compressor as small as possible, By sandwiching the protrusion integrally formed near the abutment between the discharge valve plate and the cylinder head, it is possible to use the mounting bolts of the cylinder head, etc., without using separate bolts or adhesive means. Both warm bodies are brought into close contact to form a silencer, and
The muffler can be attached to the compressor section, and the work of joining both hot bodies and installing the muffler can be done simultaneously with the attachment of the cylinder head, etc., thereby improving work efficiency. In addition, a recess for accommodating the reed valve part is formed on the discharge valve plate side of the protruding piece made of a synthetic resin material, so the bottom wall of this recess acts as a stopper for the reed valve part and prevents the reed from closing. The contact of the valve part can be softened, and a low-noise compressor with small contact noise can be provided.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention, FIG. 1 is a longitudinal sectional view of a hermetic compressor, FIG. 2 is a cross sectional view of the hermetic compressor, and FIG. 3 is a compressor section. FIG. 4 is an exploded sectional view of the compressor section, and FIG. 5 is a cross-sectional view of the main part of a conventional hermetic compressor. 1...Hermetic compressor, 7...Cylinder, 9,
16... Reed valve part, 11... Suction valve plate,
14...Valve seat plate, 17...Discharge valve plate, 18
...Discharge chamber, 19...Cylinder head, 2
0...Volt, 21...Inhalation silencer, 23.
25... Projection piece, 24... First vessel body, 26
...Second vessel body, 27...First hole, 30...
-Third hole, 31... recess.

Claims (1)

[Claims] (1) A suction valve plate, a valve seat plate, a discharge valve plate, and a cylinder head are attached in this order to the open end face of a cylinder of a piston type compressor with bolts, and the side of the cylinder is made of synthetic resin. In a compressor equipped with a suction muffler, the suction muffler is formed by abutting a first body and a second body, and an external suction muffler is provided near the joint of both bodies in the same direction. A protruding piece protruding toward the direction is integrally formed, and a hole larger than the reed valve portion of the discharge valve plate is formed in the protruding piece of the first vessel body, while a hole larger than the reed valve portion of the discharge valve plate is formed in the protruding piece of the second vessel body. A small hole is provided which is smaller than the hole in the protruding piece of the first vessel body and communicates the hole with the discharge chamber of the cylinder head, and both of these protruding pieces are connected so that the protruding piece of the first vessel body is on the discharge valve plate side. A silencer for a compressor, characterized in that the bolt is clamped and fixed between a discharge valve plate and a cylinder head.