Totally enclosed compressor root connection
The design of the steel sleeve joint structure solves the problem of high cost or complex maintenance of copper tube root fracture failure in fully enclosed compressors, and achieves stable connection with low cost and short process cycle, improving weld quality and connection reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI FUMED TIANJIAN CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-07
AI Technical Summary
Existing repair methods for copper tube root fracture faults in fully enclosed compressors are costly or complex, and cannot meet the requirements for fast and stable connections.
The steel sleeve joint structure is adopted, including a connecting seat and a connecting pipe. The compressor copper pipe and the refrigeration system copper pipe are connected by electric welding and brazing. The steel sleeve joint is made of 45 steel or 40Cr steel and is heat treated. The design includes through holes to reserve space for welding seams and optimizes the bevel to improve the quality of the weld seams.
It achieves low-cost, short-cycle connection, stable structure, reduced welding defects, and meets the needs of compressor use.
Smart Images
Figure CN224469277U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration maintenance technology, specifically to a fully enclosed compressor root pipe connection structure. Background Technology
[0002] In refrigeration systems, fully enclosed compressors are widely used in various devices such as air conditioners and refrigerators. As the core component of the refrigeration system, the stable operation of the compressor is crucial. However, fracture at the root of the compressor copper tubes is one of the common failures in refrigeration systems, with complex causes and requiring sophisticated repair techniques.
[0003] Currently, there are two main ways to handle this type of failure. The first is to directly replace the compressor, which is costly and wastes resources. The second method involves cutting open the hermetic compressor casing, removing the internal components, welding and replacing the broken pipes, cleaning all parts, reassembling, and finally performing explosion-proof welding. Although this method can preserve important internal components of the compressor, it is complex and requires significant time and labor costs. Utility Model Content
[0004] Therefore, it is necessary to provide a fully enclosed compressor root pipe connection structure to address the aforementioned existing problems. This structure has low connection cost, short connection process cycle, and stable structure, which can meet the needs of compressor use.
[0005] A fully enclosed compressor root pipe connection structure, characterized in that it includes:
[0006] The compressor has a copper pipe connection port;
[0007] The steel sleeve joint includes a connecting seat and a connecting pipe. The connecting seat is electrically welded to the copper pipe connection port of the compressor. The steel sleeve joint is 30-50mm in length.
[0008] The copper pipes of the refrigeration system are brazed to the steel sleeve joint connecting pipes.
[0009] The steel sleeve joint has a through hole in the center, with an inner diameter of D, which is 0.3-0.5mm larger than the diameter of the copper pipe.
[0010] The above-mentioned fully enclosed compressor root pipe connection structure, wherein:
[0011] The wall thickness of the connecting pipe for the steel sleeve joint is P = 2.5-5mm;
[0012] The connecting seat of the steel sleeve joint is in the shape of a disc, with an outer diameter D1 = D2 + 2P + 8mm and a thickness of 6-8mm.
[0013] The above-mentioned fully enclosed compressor root pipe connection structure, wherein:
[0014] The steel sleeve joint is made of 45 steel or 40Cr steel and is heat-treated.
[0015] The above-mentioned fully enclosed compressor root pipe connection structure, wherein:
[0016] The bottom of the through hole of the steel sleeve joint has a 2mm inner chamfer.
[0017] The above-mentioned fully enclosed compressor root pipe connection structure has the following advantages over the prior art: low structural connection cost, short connection process cycle, and stable structure, which can meet the needs of compressor use; the bevel design at the bevel can improve the weld quality and reduce welding defects. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the steel sleeve joint in the root pipe connection structure of the fully enclosed compressor in one embodiment of this utility model. Detailed Implementation
[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0020] In the description of this utility model, it should be understood that the terms "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0022] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0023] See Figure 1 As shown, this utility model provides a fully enclosed compressor root pipe connection structure, which includes: a compressor having a copper pipe connection port; a steel sleeve joint 100, including a connecting seat 102 and a connecting pipe 101, the connecting seat 102 being electrically welded to the compressor copper pipe connection port, the steel sleeve joint having a total length L of 30-50mm, the steel sleeve joint being made of 45# steel or 40Cr steel and being heat treated; and a refrigeration system copper pipe being brazed to the steel sleeve joint 100 connecting pipe 101.
[0024] The steel sleeve joint 100 has a through hole in the center with an inner diameter of D. The inner diameter of the through hole D is 0.3-0.5mm larger than the diameter of the copper pipe to allow sufficient space for welding.
[0025] The wall thickness of the connecting pipe 101 of the steel sleeve joint is P = 2.5-5mm; the connecting seat 102 of the steel sleeve joint is in the shape of a disc, with an outer diameter D1 = D + 2P + 8mm and a thickness of 6-8mm.
[0026] In another embodiment, the bottom of the through hole of the steel sleeve joint 100 is chamfered by 2mm, i.e., D2 = D + 4mm. This can improve the weld quality, reduce welding defects, and also reduce the root cleaning work.
[0027] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0028] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A hermetic compressor root connection structure, characterized by, include: The compressor has a copper pipe connection port; The steel sleeve joint includes a connecting seat and a connecting pipe. The connecting seat is electrically welded to the copper pipe connection port of the compressor. The steel sleeve joint is 30-50mm in length. The copper pipes of the refrigeration system are brazed to the steel sleeve joint connecting pipes. The steel sleeve joint has a through hole in the center, with an inner diameter of D, which is 0.3-0.5mm larger than the diameter of the copper pipe.
2. The fully enclosed compressor root pipe connection structure according to claim 1, characterized in that: The wall thickness of the connecting pipe for the steel sleeve joint is P = 2.5-5mm; The connecting seat of the steel sleeve joint is in the shape of a disc, with an outer diameter D1 = D + 2P + 8mm and a thickness of 6-8mm.
3. The fully enclosed compressor root pipe connection structure according to claim 1, characterized in that: The steel sleeve joint is made of 45 steel or 40Cr steel and is heat-treated.
4. The fully enclosed compressor root pipe connection structure according to claim 1, characterized in that: The bottom of the through hole of the steel sleeve joint has a 2mm inner chamfer.