JPS585111Y2 - Hermetic electric compressor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hermetic electric compressor, particularly to the structure of the heat exchange pipe installed at the bottom of the container.

Conventionally, hermetic electric compressors are equipped with heat exchange pipes through which condensed refrigerant flows in order to cool lubricating oil stored at the bottom of the container.

That is, as shown in FIGS. 1 and 2, insertion holes 3, 3 having approximately the same diameter as the pipe diameter of the heat exchange pipe 2 are provided in the lower side wall of the container 1, and the planer exchange pipe 2 has the inner diameter of the container 1. Dimension A
It is curved so that its length dimension B is smaller than that of the first one.

Then, the heat exchange pipe 2 is placed at the inner bottom of the container 1, and the both ends 4° 4 are moved in parallel so that they protrude outside from the insertion holes 3, 3, and then fixed to the insertion holes 3, 3 by welding. There is.

Therefore, the heat exchange pipe 2 is not arranged over the entire bottom of the container 1, and the cooling on the side opposite to the mounting position is insufficient, resulting in non-uniform heat exchange within the container in the refrigeration cycle.

The present invention was made to solve the above-mentioned drawbacks, and the embodiment shown in the drawings will be described below.

Reference numeral 1 denotes a container that stores lubricating oil at the bottom and houses the electric compressor main body (not shown), and the lower side wall of the container is provided with an insertion hole 3' having a diameter larger than the pipe diameter of a heat exchange pipe 2', which will be described later. 3' is drilled.

The heat exchange pipe 2' is bent to have a dimension E longer than the inner diameter dimension A of the container 1, and its both ends 4
The insertion hole 3' is closed by a sleeve 5 which is arranged at the inner bottom of the container 1 so that the insertion holes 3' and 4' protrude outside from the insertion holes 3' and 3', and which is inserted through the both ends 4' and 4'. ing.

This insertion hole 3' may be formed into a vertically elongated hole, or may be one.

Next, to explain how the heat exchange pipe 2' is arranged and attached to the container 1, both ends 4' of the heat exchange pipe 2',
4' with the sleeve 5 inserted into the heat exchange pipe 2.
As shown in FIG. 5, it is inclined from the opening of the container 1 so that both ends 4', 4' face the insertion hole 3'.

Then, while rotating, both ends 4', 4' are made to protrude outside from the insertion hole 3', and the heat exchange pipe 2' is arranged so as to be in contact with the inner bottom of the container 1. After that, the sleeve 5 is moved and the insertion hole is 3' is closed and fixed by welding to complete the installation work.

The sleeve 5 may be welded by placing the heat exchange pipe 2' inside the container 1, inserting the sleeve 5 through both ends 4', 4' of the outside of the container 1, and closing the insertion hole 3'.

As described above, in this case, an insertion hole having a diameter larger than the pipe diameter of the heat exchange pipe is formed in the lower side wall of the container, and the heat exchange pipe is bent to have a dimension longer than the inner diameter of the container, and both ends of the insertion hole are formed in the lower side wall of the container. The insertion hole is closed by a sleeve that protrudes outward and is disposed at the inner bottom of the container, and is inserted through both ends of the heat exchange pipe.
It becomes possible to use a heat exchange pipe that is longer than the inner diameter of the container, and as a result, the heat exchange pipe is located over substantially the entire inner bottom of the container, which greatly improves heat exchange and improves the performance and reliability of the compressor.

[Brief explanation of the drawing]

Figures 1 and 2 are a plan view and longitudinal cross-sectional view of main parts of a conventional hermetic electric compressor, and Figures 3 and 4 are hermetic electric compressors of the present invention corresponding to Figures 1 and 2. FIG. 5 is a sectional view of the main part during installation. 1... Container, 3'... Insertion hole, 2'...
...Heat exchange pipe, 5...Sleeve.

Claims (1)

[Scope of utility model registration request] An insertion hole having a diameter larger than the pipe diameter of the heat exchange pipe is formed in the lower side wall of the container, and the heat exchange pipe is bent to have a longer dimension than the inner diameter of the container, and both ends thereof are made to protrude outside from the insertion hole. 1. A hermetic electric compressor, characterized in that said insertion hole is closed by a sleeve disposed at the inner bottom of said container and inserted through both ends of said heat exchange pipe.