Liquid accumulator connecting pipe structure and compressor
Patent Information
- Application Number
- CN202521671512.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-07
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-08-07
AI Technical Summary
[0002]储液器弯管结构是串联压缩机壳体与储液器的重要连接部件，在现有制造工艺中，通常选用铜质管件或一体化钢铁质管件来作为储液器弯管结构，但二者均在一定程度上存在技术缺陷，其中，铜质管件具有较高的原材料成本而导致经济性不足，并且铜合金材料的结构刚性偏低，在压缩机高速运转和频繁启停的运行工况下，容易诱发管件共振，进而恶化整机噪声、振动性能指标，影响用户体验和设备寿命，而一体化设计的钢铁质管件虽然具备更高的机械强度和耐久性，但在火焰钎焊、高频焊工艺条件下，存在焊接冶金结合强度不足、热影响区晶相组织劣化等技术瓶颈，导致焊缝可靠性与气密性较差，增加了泄漏风险和维护成本
[0019]本实用新型提供一种储液器连接管结构及压缩机，其中，该储液器连接管结构包括：弯管与复合管，弯管采用钢材料制成，复合管固定连接于弯管，且复合管由内到外依次由内管体、中管体与外管体组成，外管体包覆于中管体外侧，内管体内贴设于中管体内侧，内管体采用钢材料制成，且内管体的厚度为H，外管体采用铜材料制成，且外管体的厚度为h，其中，h和H满足：h/H<0.5。如此设置，采用复合管与弯管的分体式结构，并结合复合管的材料复合化设计，进而实现刚度耦合增强，优化应力分布，在储液器下部形成了更高刚性的节点，有效减少噪音振动或压力波动导致的局部变形，从而提升整体抗变形能力。
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Figure CN224730316U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rotary compressor technology, and in particular to a liquid receiver connecting pipe structure and a compressor. Background Technology
[0002] The receiver bend structure is a crucial connecting component between the compressor housing and the receiver. In existing manufacturing processes, copper or integrated steel fittings are typically used for the receiver bend structure. However, both have certain technical drawbacks. Copper fittings have high raw material costs, resulting in insufficient economic efficiency. Furthermore, the structural rigidity of copper alloy materials is relatively low, which can easily induce resonance in the fittings under high-speed operation and frequent start-stop conditions of the compressor. This can worsen the overall noise and vibration performance, affecting user experience and equipment lifespan. While integrated steel fittings offer higher mechanical strength and durability, they suffer from technical bottlenecks such as insufficient weld metallurgical bonding strength and deterioration of the crystalline structure in the heat-affected zone under flame brazing and high-frequency welding processes. This leads to poor weld reliability and airtightness, increasing leakage risk and maintenance costs.
[0003] Therefore, there is an urgent need for a liquid receiver connection pipe structure and a compressor to solve the above problems. Utility Model Content
[0004] The purpose of this utility model is to provide a liquid receiver connecting pipe structure and a compressor, which can effectively enhance its overall rigidity and strength and reduce compressor noise and vibration.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] On one hand, this utility model provides a liquid receiver connecting pipe structure for connecting between a liquid receiver and a compressor housing, the liquid receiver connecting pipe structure comprising:
[0007] A bend, wherein the bend is made of steel.
[0008] A composite pipe is fixedly connected to the bend, and the composite pipe is composed of an inner pipe body, a middle pipe body, and an outer pipe body from the inside out. The outer pipe body covers the outside of the middle pipe body, and the inner pipe body is attached to the inside of the middle pipe body. The inner pipe body is made of steel and has a thickness of H. The outer pipe body is made of copper and has a thickness of h, wherein h and H satisfy: h / H<0.5.
[0009] As a preferred technical solution for the above-mentioned liquid reservoir connecting pipe structure, the composite pipe includes a first pipe section, an intermediate pipe section and a second pipe section in sequence along its own length direction. The intermediate pipe section is connected between the first pipe section and the second pipe section. The inner diameter of the first pipe section is smaller than the inner diameter of the second pipe section. The second pipe section is fixedly connected to the bend.
[0010] As a preferred technical solution for the above-mentioned liquid reservoir connecting pipe structure, the inner diameter of the second pipe section is d, the outer diameter of the bend is D, and d and D satisfy: -0.1mm≤Dd≤0.2mm.
[0011] As a preferred technical solution for the above-mentioned liquid reservoir connecting pipe structure, the middle pipe body is made of copper-steel alloy material.
[0012] As a preferred technical solution for the above-mentioned liquid reservoir connecting pipe structure, the thickness of the middle pipe body is h1, and h1=1.5um±1um.
[0013] As a preferred technical solution for the above-mentioned liquid reservoir connecting pipe structure, one end of the bent pipe is connected to the liquid reservoir, the other end of the bent pipe is fixedly connected to one end of the composite pipe, and the other end of the composite pipe is connected to the compressor housing.
[0014] As a preferred technical solution for the above-mentioned liquid reservoir connecting pipe structure, the composite pipe and the bend are connected by welding.
[0015] As a preferred technical solution for the above-mentioned liquid reservoir connecting pipe structure, the welding method between the composite pipe and the bend is any one of brazing, laser welding and high-frequency welding.
[0016] On the other hand, this utility model also provides a compressor, including a housing, a liquid reservoir, and a liquid reservoir connecting pipe structure as described in any of the above embodiments, wherein the bent pipe is connected to the liquid reservoir, and the composite pipe is connected to the housing.
[0017] As a preferred technical solution of the above-mentioned compressor, the liquid receiver is provided with a storage cavity and a discharge port communicating with the storage cavity. One end of the bent pipe is located outside the liquid receiver and is fixedly connected to the composite pipe. The other end of the bent pipe passes through the discharge port and extends into the storage cavity.
[0018] The beneficial effects of this utility model are as follows:
[0019] This utility model provides a liquid reservoir connecting pipe structure and a compressor. The liquid reservoir connecting pipe structure includes a bend and a composite pipe. The bend is made of steel, and the composite pipe is fixedly connected to the bend. The composite pipe consists of an inner pipe body, a middle pipe body, and an outer pipe body from the inside out. The outer pipe body covers the outside of the middle pipe body, and the inner pipe body is attached to the inside of the middle pipe body. The inner pipe body is made of steel with a thickness of H, and the outer pipe body is made of copper with a thickness of h, where h / H < 0.5. This design, using a separate structure of the composite pipe and the bend, combined with the composite material design of the composite pipe, achieves enhanced stiffness coupling, optimizes stress distribution, and forms a more rigid node at the bottom of the liquid reservoir. This effectively reduces local deformation caused by noise vibration or pressure fluctuations, thereby improving the overall deformation resistance. Attached Figure Description
[0020] Figure 1 A schematic diagram of the liquid reservoir connecting pipe structure and the liquid reservoir structure provided by this utility model;
[0021] Figure 2 A schematic diagram of the structure of the composite pipe provided by this utility model;
[0022] Figure 3 A partial structural schematic diagram of the composite pipe provided by this utility model;
[0023] Figure 4 A schematic diagram of the bent pipe provided by this utility model.
[0024] in:
[0025] 1. Liquid reservoir; 11. Storage chamber;
[0026] 2. Pipe bending;
[0027] 3. Composite pipe; 31. First pipe section; 32. Intermediate pipe section; 33. Second pipe section; 301. Inner pipe body; 302. Middle pipe body; 303. Outer pipe body. Detailed Implementation
[0028] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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. The terms "first position" and "second position" refer to two different positions.
[0030] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0033] like Figures 1 to 4As shown, this embodiment provides a liquid receiver connecting pipe structure for connecting the liquid receiver 1 and the compressor housing. The liquid receiver connecting pipe structure includes: a bend 2 and a composite pipe 3. The bend 2 is made of steel. The composite pipe 3 is fixedly connected to the bend 2. The composite pipe 3 is composed of an inner pipe body 301, a middle pipe body 302 and an outer pipe body 303 from the inside to the outside. The outer pipe body 303 covers the outside of the middle pipe body 302. The inner pipe body 301 is attached to the inside of the middle pipe body 302. The inner pipe body 301 is made of steel and has a thickness of H. The outer pipe body 303 is made of copper and has a thickness of h. Wherein, h and H satisfy: h / H<0.5. This configuration, employing a split structure of composite pipe 3 and bend 2, combined with the composite material design of composite pipe 3, achieves enhanced stiffness coupling, optimizes stress distribution, and forms a higher rigidity node at the bottom of the reservoir 1. This effectively reduces local deformation caused by noise vibration or pressure fluctuations, thereby improving the overall deformation resistance.
[0034] In this embodiment, to improve welding performance and ensure the airtightness of the structure, the composite pipe 3 and the bend 2 are connected by welding. Furthermore, the welding method between the composite pipe 3 and the bend 2 is any one of furnace brazing, laser welding, and high-frequency welding.
[0035] It should be noted that copper has far superior brazing, laser welding, and high-frequency welding compatibility compared to steel. Copper's high thermal conductivity, low oxidation tendency, and good melt flowability enable it to form dense, defect-free welds during welding (especially furnace brazing), significantly reducing the risks of porosity and cracks. During welding, the copper layer can serve as an intermediate transition material, alleviating stress concentration problems caused by differences in thermal expansion coefficients when directly welding steel to steel. Furthermore, the inner tube 301, made of steel, further enhances the structural strength, bearing the refrigerant pressure or mechanical loads inside the reservoir 1 and preventing deformation or rupture.
[0036] Optionally, the composite pipe 3 includes, along its length, a first pipe section 31, an intermediate pipe section 32, and a second pipe section 33. The intermediate pipe section 32 is flared and connects the first pipe section 31 and the second pipe section 33. The inner diameter of the first pipe section 31 is smaller than the inner diameter of the second pipe section 33. The bend 2 is inserted into the second pipe section 33 and welded to it, with the bend 2 and the inner pipe body 301 having an interference fit. This configuration strengthens the flared structure, and the flared portion of the intermediate pipe section 32 forms a locally thickened transition zone after welding, thus increasing the cross-sectional area at the connection and further improving its resistance to deformation.
[0037] Optionally, the inner diameter of the second pipe section 33 is d, and the outer diameter of the bend 2 is D, and d and D satisfy: -0.1mm≤Dd≤0.2mm.
[0038] Optionally, the middle tube body 302 is made of copper-steel alloy. This design allows the copper-steel alloy to have a melting point between that of copper and steel, resulting in a smoother metallurgical transition zone during welding, reducing the risk of hot cracking, optimizing weld compatibility, and improving bond strength.
[0039] Specifically, the thickness of the central tube 302 is h1, and h1 = 1.5um ± 1um.
[0040] Optionally, one end of the bend 2 is connected to the liquid reservoir 1, and the other end of the bend 2 is fixedly connected to one end of the composite pipe 3, and the other end of the composite pipe 3 is connected to the compressor housing.
[0041] On the other hand, this embodiment also provides a compressor, including a housing, a liquid receiver 1, and the liquid receiver connecting pipe structure in the above scheme, with a bend 2 connected to the liquid receiver 1 and a composite pipe 3 connected to the housing.
[0042] Optionally, the liquid reservoir 1 is provided with a storage chamber 11 and a discharge port communicating with the storage chamber 11. One end of the bent pipe 2 is located outside the liquid reservoir 1 and is fixedly connected to the composite pipe 3. The other end of the bent pipe 2 passes through the discharge port and extends into the storage chamber 11.
[0043] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A structure of a liquid accumulator connecting pipe for connecting between a liquid accumulator (1) and a compressor housing, characterized by, The liquid reservoir connecting pipe structure includes: The bend (2) is made of steel. A composite pipe (3) is fixedly connected to the bend (2), and the composite pipe (3) is composed of an inner pipe body (301), a middle pipe body (302) and an outer pipe body (303) from the inside to the outside. The outer pipe body (303) covers the outside of the middle pipe body (302), and the inner pipe body (301) is attached to the inside of the middle pipe body (302). The inner pipe body (301) is made of steel and has a thickness of H. The outer pipe body (303) is made of copper and has a thickness of h. Wherein, h and H satisfy: h / H<0.
5.
2. The reservoir connection tube structure of claim 1, wherein The composite pipe (3) includes a first pipe section (31), an intermediate pipe section (32) and a second pipe section (33) in sequence along its own length direction. The intermediate pipe section (32) is connected between the first pipe section (31) and the second pipe section (33). The inner diameter of the first pipe section (31) is smaller than the inner diameter of the second pipe section (33). The second pipe section (33) is fixedly connected to the bend (2).
3. The reservoir connection tube structure of claim 2, wherein The inner diameter of the second pipe section (33) is d, and the outer diameter of the bend (2) is D, and d and D satisfy: -0.1mm≤Dd≤0.2mm.
4. The reservoir connection tube structure of claim 1, wherein The central tube (302) is made of copper-steel alloy material.
5. The reservoir connection tube structure of claim 4, wherein The thickness of the central tube (302) is h1, and h1 = 1.5um ± 1um.
6. The reservoir connection tube structure according to any one of claims 1 to 5, characterized by, One end of the bent pipe (2) is connected to the liquid reservoir (1), and the other end of the bent pipe (2) is fixedly connected to one end of the composite pipe (3). The other end of the composite pipe (3) is connected to the compressor housing.
7. The reservoir connection tube structure according to any one of claims 1 to 5, characterized by, The composite pipe (3) and the bend (2) are connected by welding.
8. The reservoir connection tube structure of claim 7, wherein The welding method between the composite pipe (3) and the bend (2) is any one of brazing, laser welding and high-frequency welding.
9. A compressor characterized by, The device includes a housing, a reservoir (1), and a reservoir connecting pipe structure as described in any one of claims 1-8, wherein the bent pipe (2) is connected to the reservoir (1), and the composite pipe (3) is connected to the housing.
10. The compressor of claim 9, wherein, The liquid reservoir (1) is provided with a storage cavity (11) and a discharge port communicating with the storage cavity (11). One end of the bent pipe (2) is located outside the liquid reservoir (1) and is fixedly connected to the composite pipe (3). The other end of the bent pipe (2) passes through the discharge port and extends into the storage cavity (11).