JPH09151878A - Rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary compressor to dispense with variation of a metal fitting for mounting and a band even when the outside of an accumulator is changed, perform the use of the metal fitting in combination, easily cope with a different capacity compressor, and ensure a pressure resisting strength through simple structure without forming a part of a closed container in double structure. SOLUTION: A rotary compressor comprises a motor-driven element and a rotary compression element contained in a closed container 1; a rotary shaft to transmit the rotation force of the motor-driven element to a rotary element; a rotary shaft to transmit the rotation force of the motor-driven element to the rotary compression element; and an accumulator 32 communicated with a suction pipe 31 communicating with the interior of the cylinder of the rotary compressor element and fixed at the side of the closed container 1. The accumulator 32 comprises a cylindrical container body 40; and an L-shaped connection pipe 42 having one end inserted in a container and the other end connected to the suction pipe 31. A connection pipe 42 positioned in the vicinity of the suction pipe 31 and the closed container 1 are securely intercoupled by means of metal fittings 45 and 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor in which an accumulator is connected to a suction pipe communicating with the inside of a cylinder of a rotary compression element.

[0002]

2. Description of the Related Art In a conventional general rotary compressor, an accumulator which is connected to a suction pipe communicating with the inside of a cylinder of a rotary compression element and which is fixed to a side portion of a hermetic container is specifically attached. Is a structure as shown in FIG. That is, the accumulator 100 includes a cylindrical container body 101 and a screen 102 fixed in the container.
And an L-shaped connecting pipe 104 having one end inserted into the container 101 and the other end connected to the suction pipe.

Here, in the method of manufacturing the accumulator 100, a disc-shaped screen 102 is press-fitted into a copper tube, and both ends of the copper tube are drawn to assemble a cylindrical container body 101. After this, L formed separately
One end of the character-shaped connecting pipe 104 is inserted into the container body 101, and the connecting pipe 104 and the lower end opening 103 of the container body 101 are brazed and welded to complete the process. At this time, a predetermined gap is secured between one end of the connection pipe 104 and the screen 102 for gas suction.

Further, the accumulator 100 is fixed by a metal fitting 105 welded to the side wall 107 of the compressor and a band 106 wound around the body of the container body 101, which is locked by the metal fitting.

[0005]

However, according to the above structure, the accumulator 100 is provided on the side wall 1 of the compressor.
In the case where the capacity of the compressor is different and the size of the accumulator 100 is changed, the structure is fixed by the metal fitting 105 welded to 07 and the band 106 that is locked to the metal fitting and wound around the body of the container body 101. Is a metal fitting 10 having a separate shape corresponding to the outer diameter of the accumulator 100 in advance.
5 and the band 106 had to be prepared, the number of parts increased, the work became complicated, and the cost increased.

On the other hand, in a rotary compressor of the type in which the airtight container is filled with high-pressure gas, there is a case where the pressure resistance is considerably required. In such a case, the plate thickness of the airtight container may be increased, In particular, it is necessary to make the closed container near the suction pipe, which is required to withstand pressure, have a double structure, and in this case as well, the number of parts and the number of work steps are increased.

The present invention solves the above problems,
Even if the outer diameter of the accumulator changes, there is no need to change the metal fittings or band for mounting, it is possible to use the metal fittings as well, and it is possible to easily accommodate compressors of different capacities. An object of the present invention is to provide a rotary compressor capable of ensuring pressure resistance with a simple structure without having a double structure.

[0008]

SUMMARY OF THE INVENTION According to the present invention, an electric element and a rotary compression element housed in a closed container, a rotary shaft for transmitting a rotational force of the electric element to the rotary compression element, and a cylinder of the rotary compression element. In a rotary compressor provided with an accumulator connected to a suction pipe communicating with the inside, and having an accumulator fixed to a side part of the hermetically sealed container, the accumulator is a cylindrical container body, and one end is in the container. The L-shaped connecting pipe is inserted and the other end is connected to the suction pipe, and is fixed by connecting the connecting pipe located in the vicinity of the suction pipe and the closed container with a metal fitting. It is configured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. FIG. 1 is a sectional view of a rotary compressor showing one embodiment of the present invention. Reference numeral 1 denotes a closed container in which an electric element 2 is housed on the upper side and a rotary compression element 3 driven by the electric element is housed on the lower side. The electric element 2 is composed of a stator 4, a rotor 5 arranged inside the stator, and a rotary shaft 6 inserted and mounted in the center of the rotor.

The rotary compression element 3 includes a cylinder block 10 having a cylindrical cylinder 7, and a roller 12 which is rotated along an inner wall of the cylinder 7 by an eccentric portion 11 of a rotary shaft 6.
A vane (not shown) that slides in a sliding groove formed in the cylinder block 10 and contacts the roller 12 to partition the inside of the cylinder 7 into a high pressure chamber and a low pressure chamber; and an upper portion that seals the opening of the cylinder 7. The frame 17 and the lower frame 18 are provided.

The lower frame 18 is provided with a recess 19, and the recess 19 is closed by a lid 20 and is fixed to the cylinder block 10 integrally with the lower frame 18 by a bolt 22 so that the interior of the cylinder block 10 is prevented. An expandable silencer 21 is formed in the.

Reference numeral 23 is a groove portion formed in the flange portion of the lower frame 18 and communicating with the inside of the cylinder 7 through a passage portion 24. The groove portion 23 is formed as a Helmholtz resonance type silencer.

In the lower frame 18, the inside of the cylinder 7 and the recess 19 are formed.
A discharge port 28 that communicates with the inside is provided. The discharge port 28 is opened and closed by a discharge valve 29.

Reference numeral 31 is a suction pipe communicating with the inside of the cylinder 7.
An accumulator 32 is attached to the suction pipe by welding. Reference numeral 33 is a discharge pipe attached to the upper wall of the closed container 1.

The accumulator 32 comprises a cylindrical container body 40 and an L-shaped connecting pipe 42 having one end inserted into the container 40 and the other end connected to the suction pipe 31. .

The accumulator 32 is fixed to the side wall of the compressor by connecting the connecting pipe 42 located near the suction pipe 31 and the closed container 1 with metal fittings 45, 46 and screws 47. There is.

That is, the accumulator 32 has a Z-shaped metal fitting 4 whose one end is welded to the closed container 1 as shown in FIG.
5, a C-shaped metal fitting 46 for sandwiching the connecting pipe 42 corresponding to the other end of the metal fitting, and a screw 47 connecting the two metal fittings 45, 46.

The method of manufacturing the accumulator 32 is as follows.
The tubular container body 40 is formed by drawing the upper and lower ends of the copper tube that becomes the container body 40. Thereafter, one end of the separately formed L-shaped connecting pipe 42 is inserted into the container body 40, and the connecting pipe 42 and the lower end opening 48 of the container body 40 are brazed and welded to complete the process.

According to the above configuration, the accumulator 3
2 is fixed to the side wall of the compressor by connecting the connecting pipe 42 located in the vicinity of the suction pipe 31 and the closed container 1 with the metal fittings 45, 46 and the screw 47, as shown in FIG. Even if the outer diameter of the accumulator 32 is changed to various diameters, the diameter of the connecting pipe 42 is always the same, and it is not necessary to change these because no fittings or bands for attachment are used unlike the conventional case.

Therefore, the metal fittings 45 and 46 can be used in common, and the compressors of different capacities can be easily accommodated.

Further, since the metal fittings 45 and 46 are welded and fixed to the closed container 1 in the vicinity of the suction pipe 31, that is, in the closed container 1 corresponding to the weakest space portion, the strength of this portion can be improved. Thus, it is possible to provide a rotary compressor capable of ensuring pressure resistance with a simple structure without forming a part of a closed container into a double structure as in the conventional case.

6 and 7 show another embodiment,
The accumulator 32 has a U-shaped metal fitting 55 whose one end is welded to the closed container 1, a C-shaped metal fitting 56 for sandwiching the connection pipe 42 corresponding to the other end of the metal fitting, and both the metal fittings 5.
It is configured to be fixed by a screw 57 that connects 5, 56, and this configuration also has the same effect as the above-described configuration.

[0023]

As described above, according to the present invention, even if the outer diameter of the accumulator changes, it is not necessary to change the metal fittings and bands for mounting, and it is possible to use the metal fittings in common and to use them in compressors of different capacities. It is possible to provide a rotary compressor that can be easily dealt with and can secure pressure resistance with a simple structure without forming a part of the closed container as a double structure.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a rotary compressor showing an embodiment of the present invention.

FIG. 2 is a front view of a rotary compressor.

FIG. 3 is a plan view of a rotary compressor.

FIG. 4 is an exploded perspective view of a metal fitting.

FIG. 5 is a front view of a rotary compressor showing mounting examples of various accumulators.

FIG. 6 is a front view of a metal fitting showing another embodiment.

FIG. 7 is a perspective view of the metal fitting of FIG.

FIG. 8 is a sectional view of an accumulator showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airtight container 2 Electric element 3 Rotary compression element 6 Rotating shaft 7 Cylinder 10 Cylinder block 11 Eccentric part 12 Roller 13 Sliding groove 16 Vane 17 Upper frame 18 Lower frame 31 Suction pipe 32 Accumulator 40 Vessel main body 42 Connection pipe 45 Metal fittings 46 metal fittings 47 screws

Front page continued (72) Inventor Reiko Nomoto 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (72) Inventor Yasuhiko Utsunomiya 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. An electric element and a rotary compression element housed in a closed container, a rotary shaft for transmitting the rotational force of the electric element to the rotary compression element, and a suction pipe communicating with the cylinder of the rotary compression element. And a rotary compressor including an accumulator fixed to a side portion of the closed container, wherein the accumulator includes a cylindrical container body, one end of which is inserted into the container, and the other end of which is the suction pipe. And a L-shaped connection pipe connected to the suction pipe, and the connection pipe located near the suction pipe and the closed container are fixed by connecting with a metal fitting. .