Air supply mechanism of scroll refrigeration compressor

Abstract

The utility model discloses an air supply mechanism of a scroll type refrigeration compressor, and relates to the technical field of refrigeration scroll compressors, in particular to a structure, with an air supply function, of the scroll type refrigeration compressor. The scroll compressor comprises a fixed scroll and an upper cover, a side hole is drilled in the side part of the fixed vortex back plate; a hole is drilled in the side part of the upper cover; the blowdown pipe penetrates through the hole and then is inserted into the side hole; an O-shaped ring for sealing is arranged between the air supplementing pipe and the fixed vortex; an annular boss is machined on the air supplementing pipe, and the outer diameter of the boss is much larger than the hole diameter of the hole. The boss and the side wall are welded in a carbon dioxide arc welding mode, and a welding seam is formed. According to the technical scheme, the problems that in the prior art, due to the fact that the position relation between the upper cover and the fixed vortex in the height direction is affected by superposition of a plurality of parts, fluctuation is large, a blowdown pipe and a side hole of the fixed vortex are sealed in a filling mode, sealing is not thorough, the blowdown pipe and the upper cover are welded and sealed in a brazing mode, brazing efficiency is low, and a certain leakage rate exists are solved.

Description

Technical Field

[0001] The utility model discloses an air replenishing mechanism for a scroll refrigeration compressor, which relates to the technical field of refrigeration scroll compressors, and in particular to a structure of a scroll refrigeration compressor with an air replenishing function. Background Art

[0002] When the air supply pipe is inserted into the compressor horizontally, it must pass through the side holes of the upper cover and the fixed scroll respectively. The positional relationship between the upper cover and the fixed scroll in the height direction fluctuates greatly due to the influence of the superposition of multiple parts. Usually, the air supply pipe and the side holes of the fixed scroll are sealed by filling type, and a large gap is left between the air supply pipe and the side holes of the upper cover to compensate for the height fluctuation of the fixed scroll and the upper cover. Manual brazing is used to weld and seal the air supply pipe and the upper cover, but the brazing efficiency is low and there is a certain leakage rate.

[0003] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a new type of scroll refrigeration compressor air replenishing mechanism to overcome the problems existing in the prior art. Summary of the invention

[0004] According to the above-mentioned prior art, since the positional relationship between the upper cover and the fixed scroll in the height direction fluctuates greatly due to the influence of the superposition of multiple parts, the air supply pipe and the side hole of the fixed scroll adopt a filling seal, which is not completely sealed, and the upper cover is welded and sealed by brazing, the brazing efficiency is low, and there is a certain leakage rate and other technical problems, a scroll refrigeration compressor air supply mechanism is provided. The utility model mainly increases the wall thickness of the air supply pipe by machining an annular boss on the air supply pipe, so that when the upper cover and the air supply pipe boss are welded by carbon dioxide gas shielded welding, a larger weld can be obtained to ensure effective sealing when the height difference between the upper cover and the fixed scroll fluctuates greatly.

[0005] The technical means adopted by the utility model are as follows:

[0006] A scroll refrigeration compressor air supply mechanism, comprising: a fixed scroll, an upper cover and an air supply pipe;

[0007] Further, a side hole is drilled on the side of the fixed scroll back plate;

[0008] Further, the side of the upper cover is drilled with holes;

[0009] Further, the air supply pipe is inserted into the side hole after passing through the hole;

[0010] Furthermore, an O-ring for sealing is provided between the air supply pipe and the fixed scroll;

[0011] Furthermore, the air supply pipe and the upper cover are assembled and sealed by welding.

[0012] Furthermore, an annular groove is processed on the tube wall of the air supply tube inserted into the side hole for assembling an O-ring to achieve sealing between the air supply tube and the side hole.

[0013] Furthermore, an annular boss is processed on the air supply pipe, and the outer diameter of the boss is much larger than the aperture of the hole;

[0014] Furthermore, after the inner end surface of the boss is in close contact with the side wall of the upper cover, the hole can be completely covered, and even if the air supply pipe moves up and down with the fixed scroll, it will not leak out of the hole;

[0015] Furthermore, the boss and the side wall are welded by carbon dioxide gas shielded welding to form a weld. The height of the welding gun remains unchanged, the height of the weld remains unchanged, and when the height of the gas supply pipe changes, the penetration depth on the gas supply pipe will vary greatly. The wall thickness at the boss of the gas supply pipe is relatively large, which can withstand a larger penetration depth and ensure the quality of the weld here.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. The air supply mechanism of the scroll refrigeration compressor provided by the utility model eliminates the problem of large fluctuations in the height direction position relationship between the upper cover and the fixed scroll caused by the superposition of multiple parts in the compressor, which affects the assembly effect of the air supply pipe, by arranging an O-ring for sealing between the air supply pipe and the fixed scroll and a large gap between the air supply pipe and the side hole of the upper cover.

[0018] 2. The air supply mechanism for the scroll refrigeration compressor provided by the utility model is designed so that the outer diameter of the annular boss of the air supply pipe is smaller than the diameter of the side hole of the upper cover, so that the welding of the air supply pipe can be done by carbon dioxide gas shielded welding. Compared with the old brazing scheme, the welding difficulty is reduced and the welding effect is improved. The production defect rate caused by welding leakage is greatly reduced, the production rhythm is improved, and the manufacturing cost of related processes is greatly reduced.

[0019] 3. The air replenishing mechanism of the scroll refrigeration compressor provided by the utility model has a simple structure and strong feasibility.

[0020] In summary, the technical solution of the utility model solves the problems in the prior art that the positional relationship between the upper cover and the fixed vortex in the height direction fluctuates greatly due to the influence of the superposition of multiple parts, the air supply pipe and the side hole of the fixed vortex are sealed by filling type, the sealing is not thorough, and the upper cover is welded and sealed by brazing, the brazing efficiency is low, and there is a certain leakage rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a schematic diagram of the structure of the utility model.

[0023] In the figure: 1, fixed scroll 2, upper cover 3, air supply pipe 4, O-ring 5, side hole 6, side wall 7, hole 8, outer diameter 9, boss 10, end face 11, weld. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0028] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0030] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0031] like Figure 1 As shown, the utility model provides a scroll refrigeration compressor air supply mechanism, the upper cover 2 side wall 6 is processed with a hole 7, the fixed scroll 1 is processed with a side hole 5, the air supply pipe 3 passes through the hole 7 of the upper cover 2 and is inserted into the side hole 5 of the fixed scroll 1; an O-ring 4 is installed between the air supply pipe 3 and the side hole 5 of the fixed scroll 1 to seal the air supply pipe 1 and the side hole 5 of the fixed scroll 1; a boss 9 is processed on the air supply pipe, and the outer diameter 8 of the boss 9 is much larger than the aperture of the hole 7 of the upper cover 2, so that the end face 10 of the boss 9 can completely cover the hole 7 after leaning against the side wall 6 of the upper cover 2, and the hole 7 will not be exposed even if the air supply pipe 3 moves up and down with the fixed scroll 1. Carbon dioxide gas shielded welding is used to weld between the outer diameter 8 of the boss 9 and the side wall 6 of the upper cover 2 to form a weld 11, because the hole 7 can be completely covered to prevent welding slag from entering the compressor; at the same time, because the wall thickness of the boss 9 is large, it can be ensured that the boss 9 has sufficient penetration around to ensure welding strength.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A scroll refrigeration compressor air replenishing mechanism, comprising: The fixed scroll (1), the upper cover (2) and the air supply pipe (3) are characterized by: A side hole (5) is drilled on the side of the back plate of the fixed scroll (1); The side of the upper cover (2) is drilled with a hole (7); The air supply pipe (3) passes through the hole (7) and is then inserted into the side hole (5); An O-ring (4) for sealing is provided between the air supply pipe (3) and the fixed scroll (1); The air supply pipe (3) and the upper cover (2) are assembled and sealed by welding.

2. The air replenishing mechanism for a scroll refrigeration compressor according to claim 1, characterized in that: An annular groove is machined on the wall of the air supply pipe (3) inserted into the side hole (5) for assembling an O-ring (4) to achieve sealing between the air supply pipe (3) and the side hole (5).

3. The air replenishing mechanism for a scroll refrigeration compressor according to claim 1, characterized in that: The air supply pipe (3) is machined with an annular boss (9), and the outer diameter (8) of the boss (9) is much larger than the diameter of the hole (7); When the inner end surface (10) of the boss (9) is in close contact with the side wall (6) of the upper cover (2), the hole (7) can be completely covered, and even if the air supply pipe (3) moves up and down with the fixed scroll (1), the air will not leak out of the hole (7); The boss (9) and the side wall (6) are welded using carbon dioxide gas shielded welding to form a weld (11).

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