JPH08219055A - Rotary compressor - Google Patents

Abstract

PURPOSE: To provide a rotary compressor relieving thermal effect at the time of welding the housing side and the accumulator side so as to be able to heighten the reliability of each component and in its turn that of a device itself. CONSTITUTION: A rotary compressor is formed being provided with a housing 1 for accommodating a motor-driven element 3 and a compression element 5, and an accumulator 7 disposed adjacently to the housing 1 and provided with a communicating line welded thereto. In such a rotary compressor, the welded place of the communicating line between the housing side and the accumulator side is spaced from the housing side so as to be the specified distance unaffected by heat at the welding time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor, and more particularly, when an accumulator is welded and fixed to a housing by welding, the welded portion is separated from the housing side by a large distance so that the housing is heated by heat during welding. It relates to those devised to reduce the impact on the side.

[0002]

2. Description of the Related Art A rotary compressor has, for example, a structure as shown in FIG. First of all, there is a housing 1 in which the electric element 3 and the compression element 5 are
Are housed and arranged. By rotating and driving the compression element 5 by the electric element 3, a desired compression action is achieved. An accumulator 7 for suppressing pulsation is attached to the outside of the housing 1.
That is, a short pipe 9 for mounting the accumulator 7 is projected from the housing 1 side, while a curved pipe 11 is projected at the lower end of the accumulator 7. A curved pipe 11 is fixed to the short pipe 9 by welding. The welded portion is indicated by reference numeral 13 in the figure.

Reference numeral 15 in the drawing is a band for fixing.

[0004]

According to the above conventional structure, there are the following problems.

First, the housing 1 side and the accumulator 7
Since the welded portion 13 with the side is located close to the housing 1 side, the housing 1 is affected by heat during welding.
There was a problem that distortion was generated on the side.

Further, there is a problem that the heat at the time of welding also affects a cylinder (not shown) in the housing 1 and the cylinder is also distorted.

If the housing 1 and the cylinder are distorted, the clearance of the sliding portion becomes small, which may impair the smooth sliding operation.

The present invention has been made on the basis of such a point, and its object is to alleviate the influence of heat when welding the housing side and the accumulator side, and to reduce the influence of each constituent part, that is, the apparatus itself. It is to provide a rotary compressor capable of improving reliability.

[0009]

In order to achieve the above object, a rotary compressor according to the present invention comprises a housing for accommodating an electric element and a compression element, and an accumulator arranged adjacent to the housing and having a connecting conduit welded thereto. The rotary compressor provided is characterized in that the welding points of the connecting pipes on the housing side and the accumulator side are separated from the housing side so as to be a predetermined distance that is not affected by heat during welding. .

[0010]

That is, by separating the welded portions of the connecting pipes on the housing side and the accumulator side from the housing side as described above, the influence of heat during welding on the housing side is alleviated.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

The same parts as in the prior art are designated by the same reference numerals and the description thereof will be omitted.

First, a curved pipe 101 is projected from the housing 1 side, and a short pipe 103 is projected from the accumulator 7 side.
Is protruding. Then, the curved pipe 101 is connected to the short pipe 10.
3 is welded. The welded portion is indicated by reference numeral 105 in the figure.

That is, the welding portion of the housing 1 and the accumulator 7 is separated from the housing 1 by a distance larger than in the conventional case, so that the influence of heat during welding on the housing 1 side is reduced. It is a thing.

Next, a technique related to the present invention will be described with reference to FIGS. 2 and 3 are views showing the structure of the rotary compressor, and the same parts as those in the above-mentioned embodiment are designated by the same reference numerals. An end cap 21 is attached to the top of the housing 1. In addition, the electric element 3 is
It is composed of a stator (stator) 23 and a rotor (rotor) 25, and a main shaft 27 is fixed to the rotor 25. The main shaft 27 is used to rotate and drive the compression element 5 side.

In the above structure, however, there is a problem that the oil separation is poor because the volume of the space above the electric element 3 is relatively small. Therefore, as shown in FIG. 4, the diameter of the upper end of the housing 1 is increased, and the diameter of the end cap 21 is also increased accordingly, thereby increasing the volume of the space above the electric element 3 and increasing the oil. It is conceivable to facilitate the separation, thereby increasing the amount of oil returned to the oil sump 29 at the bottom of the housing 1 and stabilizing the oil surface.

From the same point of view, as shown in FIG. 5, the end cap 21, which has been conventionally inserted on the inner peripheral side of the housing 1, is attached so as to be crowned on the outer peripheral side of the housing 1, whereby electric drive is performed. Increasing the volume of the space above the element 3 to facilitate oil separation, thereby
It is conceivable to increase the amount of oil returned to the oil sump 29 at the bottom of the housing 1 to stabilize the oil surface.

Next, a technique related to the present invention will be described with reference to FIGS. FIG. 6 is a diagram showing the structure of a rotary compressor, and the same parts as those in the description of the above-mentioned one embodiment and the related technology are designated by the same reference numerals. The fixing band 15 for fixing the accumulator 7 is usually made of metal, and therefore its diameter and shape are fixed, and there is a problem that it cannot be applied to accumulators 7 of various sizes and shapes. . Further, since it is made of metal, it is difficult to expect sound absorbing and vibration absorbing effects.

FIG. 7 is an enlarged view of a part of FIG.

Therefore, as shown in FIGS. 8 to 13, it is conceivable to use a fixing band 201 made of resin. As a result, the diameter and the shape can be freely changed, and the accumulator 7 having various sizes and shapes can be supported. In other words, it becomes possible to use a common component as a fixing band. Further, it becomes possible to expect sound absorption and vibration absorption effects.

[0021]

As described above in detail, according to the rotary compressor of the present invention, the following effects can be obtained.

First, the housing 1 side and the accumulator 7
Since the welded portion 13 with the side is located far away from the housing 1 side, the influence of heat during welding can be mitigated, and the occurrence of distortion on the housing 1 side and distortion on the cylinder side can be suppressed. it can.

Therefore, it is possible to prevent the clearance of the sliding portion from becoming small and to obtain a smooth sliding operation.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention and is a front view of a rotary compressor.

FIG. 2 is a cross-sectional view of a rotary compressor showing a related technique.

FIG. 3 is a partial cross-sectional view of a rotary compressor showing a related art.

FIG. 4 is a partial cross-sectional view of a rotary compressor showing a related art.

FIG. 5 is a diagram showing a related art and is a partial cross-sectional view of a rotary compressor.

FIG. 6 is a cross-sectional view of a rotary compressor showing a related technique.

FIG. 7 is a view showing a related technique and an enlarged view of a part of FIG. 6;

FIG. 8 is a cross-sectional view of a rotary compressor showing a related technique.

FIG. 9 is a diagram showing a related technique and an enlarged view of a part of FIG. 8;

FIG. 10 is a partial front view of a rotary compressor showing related art.

FIG. 11 is a diagram showing a related art and is a diagram showing an enlarged part of FIG. 10;

FIG. 12 is a partial top view of a rotary compressor showing related art.

FIG. 13 is a view showing a related technique and is an enlarged view of FIG. 12;

FIG. 14 is a view showing a conventional example and is a front view of a rotary compressor.

[Explanation of symbols]

 1 Housing 3 Electric Element 5 Compression Element 7 Accumulator 105 Weld

Claims (1)

[Claims] 1. A rotary compressor comprising a housing for accommodating an electric element and a compression element, and an accumulator arranged adjacent to the housing and having a connecting pipe welded thereto, wherein the connecting pipes on the housing side and the accumulator side are provided. The rotary compressor is characterized in that the welding location of is separated from the housing side by a predetermined distance that is not affected by heat during welding.