JPS63205476A - Enclosed motor compressor - Google Patents

Abstract

PURPOSE:To shorten the weld time required as well as to improve the sealability of welding, by connecting abutting part of a second closed case at a position to be crossed with that is a first closed case, in the case of a double-structural, enclosed motor compressor. CONSTITUTION:A first closed case 1 is made up of welding two vessel bodies 1a and 1b at the abutting part 1c. A motor compressor body 3 is housed in the first closed case 1. A second closed case 2 is installed so as to surround the first closed case 1. An abutting part 2c of the second closed case 2 is coupled at a position to be orthogonal with the abutting part 1c of the first closed case 1. Weld time between pipelines 8 and 9 to be led out of the first closed case 1 and the second closed case 2 is reducible. On top of that sealability in a weld is improvable.

Description

[Detailed description of the invention] (a) Industrial application field The present invention includes two airtight cases for storing the main body of an electric compressor.
This article relates to a hermetic electric compressor with a heavy structure.

(b) Conventional technology Conventionally, this type of hermetic electric compressor
As described in Publication No. 1, etc. and shown in FIG.
a sealed case 20, an electric compressor main body (not shown) housed in the first sealed case, and the container body 21.2.
It is formed by joining two container bodies 31 and 32 larger than 2 at their abutment parts 33 and surrounds the first sealed case 20. The connected gas suction pipe 24 and discharge pipe 25 were led out of the second sealed case 30. In addition, the compressor having such a structure has a double structure for the sealed case of the first sealed case 20 and the second sealed case 30, thereby reducing the leakage of the operating noise of the compressor body to the outside of the case. , reducing compressor noise.

(c) Problems to be solved by the invention However, according to the above configuration, the first sealed case 2
Since the abutment part 23 of 0 and the abutment part 33 of the second sealed case 30 are joined in the same horizontal direction, the suction pipe 24
When the second sealed case 30 is placed over the first sealed case 20 to which the suction pipe 24 and the discharge pipe 25 are welded,
Not only is the workability poor due to the obstruction of the suction pipe 2,
4 and the discharge pipe 25 to escape, the second sealed case 30 must be made larger than necessary, or the holes 26 and 27 drilled in the second sealed case 30 must be formed into stupid holes. As the compressor becomes larger, there are problems in that it takes time to weld the suction pipe 24 and the discharge pipe 25 to the second sealed case 30, and the sealing performance of the welding deteriorates.

The present invention has been made in view of the above points, and it is possible to reduce the size of the compressor as much as possible while improving the installation workability of the outer sealed case in a compressor having a double-structured sealed case. The purpose of this invention is to shorten the time required for welding work between the piping derived from the pipe and the outer sealed case, and to improve the sealing performance of welding.

(D) Means for Solving the Problems The present invention provides a first vessel formed by joining two vessel bodies at an abutment.
A sealed case, an electric compressor main body housed in the first sealed case, and two containers larger than the container body are joined together at an abutment, and surround the first sealed case. In the hermetic electric compressor, the hermetic electric compressor comprises a second hermetic case and a pipe connected to the first hermetic case is led out of the second hermetic case. It is joined at a position that intersects with the abutment of the first sealed case.

(E) Function The hermetic electric compressor of the present invention has the above-described configuration, so that when the second hermetic case is placed over the first hermetic case, which is formed by welding piping such as the suction pipe and the discharge pipe, the second hermetic By making a hole slightly larger than the pipe in the body of the second sealed case, it is possible to easily cover both bodies of the second sealed case by simply inserting them along the axial direction of the pipe and aligning them. Since there is no need to consider the relief dimension of the piping when installing the second sealed case, the second sealed case can be placed as close as possible to the first sealed case. This results in
There are no obstructions (
The work can be carried out with good efficiency without the need for piping, etc.), and the size of the second sealed case, that is, the size of the compressor, can be made smaller. In addition, since the hole formed in the second sealed case for the pipe to pass through only needs to be slightly larger than the pipe, it is possible to shorten the welding time between the hole in the sealed case and the pipe, and improve the sealing performance of the welded part. be.

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

Reference numeral 1 designates a first sealed case formed by seam welding two vessel bodies 1a and 'lb at their joints 1C. 3 is an electric compressor main body housed in the first sealed case 1, and this main body is composed of a compression element 5 equipped with an intake muffler 4, etc., and an electric element 6 that drives this compression element. .

Reference numeral 2 denotes a second sealed case that is attached to the outer wall of the first sealed case 1 via vibration isolating rubber 7 so as to surround the first sealed case. This second sealed case 2 is formed by seam welding the two vessel bodies 2a and 2b at their joints 2C, and the joints 2C are connected to the joints 1c of the first sealed case 1. They are joined at orthogonal positions. Reference numerals 8 and 9 designate refrigerant suction and discharge pipes that are welded to the first sealed case 1, led out to the outside of the second sealed case 2, and welded to the second sealed case. Also,
Each container body 2a+2b of the second sealed case 2 is provided with a hole 10.11 which is slightly larger than the respective pipes, in order to allow the suction pipe 8 and discharge pipe 9 to pass therethrough. 8, and the vessel body 2b and the discharge pipe 9 have their respective holes 10.11.
The parts are welded.

In the hermetic electric compressor configured in this way, the second
Since the abutment part 2c of the sealed case 2 is joined at a position perpendicular to the abutment part 1C of the first sealed case 1, the first sealed case 1 with the suction pipe 8 and discharge pipe 9 already welded together The work of attaching the second sealed case 2 is as simple as inserting both bodies 2a and 2b of the second sealed case along the axial direction of the respective tubes 8 and 9, and joining the abutment part 2c. Moreover, when the second sealed case 2 is installed, there is no need to consider the relief dimensions of the suction pipe 8 and discharge pipe 9 as in the conventional structure, so the ceramic bodies 2a and 2b can be made as small as possible. , the second closed case 2 can be arranged as close as possible to the first closed case 1. Moreover, since the suction pipe 8 and the discharge pipe 9 are not located near the abutment part 2C of the second sealed case 2, the seam welding work of the abutment part 2C can be carried out smoothly. Thereby, it is possible to improve the workability of attaching the second sealed case 2 and to downsize the compressor. In addition, the holes 10.11 formed in the second hermetic case 2 for inserting the tubes only need to be slightly larger than the tubes 8.9, so that it is easy to weld these tubes and the second hermetic case 2. The amount of brazing material and welding time required can be reduced, and the sealing performance of the welded area can be improved.

In this embodiment, the abutment part of the first sealed case and the abutment part of the second sealed case are in a positional relationship that is perpendicular to each other, but the present invention is not limited to this. A similar effect can be obtained if there is an angular cross-over relationship.

(G) Effects of the Invention As described above, the present invention provides a sealed electric motor with a double structure in which the sealed case is composed of a first sealed case and a second sealed case surrounding the first sealed case. In the compressor, the abutment part of the second hermetic case is joined at a position where it intersects with the abutment part of the first hermetic case. When covering with a second sealed case, if a hole is made in the body of the second sealed case that is slightly larger than the pipe, the ceramic body of the second sealed case can be inserted and fitted along the axial direction of the pipe. In addition, there is no need to consider the clearance dimension of the piping when installing the second sealed case.
The second sealed case can be arranged as close as possible to the first sealed case. This makes it possible to perform seam welding at the abutment of the second sealed case with good workability without any obstacles (piping, etc.), and also reduces the size of the second sealed case, that is, the size of the compressor. Can be done. Furthermore, since the hole for passing the pipe formed in the second sealed case only needs to be slightly larger than the pipe, the time required for welding the hole in the sealed case and the pipe can be shortened, and the sealing performance of the welded portion can be improved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a hermetic electric compressor showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a hermetic electric compressor showing a conventional example. 1... First sealed case, 1a, 1b... Vessel body,
1C...Abutment part, 2...Second sealed case, 2a
, 2b... Container body, 2C... Joint part, 3... Electric compressor main body, 8... Suction pipe, 9... Discharge pipe.

Claims (1)

[Claims] (1) A first hermetic case formed by joining two bodies together at an abutment, an electric compressor main body housed within this first hermetic case, and two vessels larger than the body. and a second sealed case that is formed by joining the two at the abutment and surrounds the first sealed case, and the pipe connected to the first sealed case is led out of the second sealed case. A hermetic electric compressor, characterized in that the abutment part of the second hermetic case is joined at a position where it intersects the abutment part of the first hermetic case.