Discharge pipe structure for rotary compressor and rotary compressor

Abstract

The utility model provides a kind of exhaust pipe structure and rotatory compressor for rotatory compressor, comprising: exhaust pipe body, hole for connecting equalizing pipe is equipped on exhaust pipe body;Reinforcing structure, it is set on exhaust pipe body, reinforcing structure is used to increase the connecting length of hole and equalizing pipe.The utility model can increase the connecting length of exhaust pipe body and equalizing pipe, thereby increase the welding penetration of exhaust pipe body and equalizing pipe, guarantee welding quality, improve welding strength, thereby reduce the probability that the leakage at this welding place leads to compressor failure.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to an exhaust pipe structure for a rotary compressor and a rotary compressor. Background Technology

[0002] Multi-split air conditioning systems (also known as "multi-split-multi" systems) are widely used in modern buildings due to their high efficiency and flexibility. These systems typically employ a design where multiple compressors operate in parallel to meet cooling / heating demands under varying conditions. Ensuring that the lubricating oil level inside each compressor is maintained at a normal level is crucial, as it has a decisive impact on the reliable operation and lifespan of the compressors.

[0003] To address the oil balance issue when multiple compressors are operating in parallel, a common industry practice is to design and install an oil equalization pipe structure between the compressor's discharge pipe and the compressor housing. This oil equalization pipe balances the oil pressure inside the different compressor housings, promoting uniform distribution of lubricating oil and preventing damage to individual compressors due to insufficient oil.

[0004] To secure the oil distribution pipe, additional holes are typically drilled in the compressor housing and exhaust pipe. After drilling the hole in the exhaust pipe, one end of the oil distribution pipe is inserted and positioned within it. The pipe is then welded to the exhaust pipe at this point. Because the weld is located on the side wall of the exhaust pipe, the weld penetration depth is limited to the wall thickness of the exhaust pipe (usually relatively small). This shallow penetration results in a small effective load-bearing area for the weld, making it difficult to guarantee sufficient weld strength. The direct consequence of insufficient weld strength is that this connection point becomes a weak point in the system's pressure resistance. During long-term compressor operation, subjected to repeated pressure fluctuations, vibrations, and thermal stress, this weld is highly susceptible to fatigue cracking or seal failure, leading to leakage and compressor failure. Utility Model Content

[0005] The purpose of this utility model is to provide an exhaust pipe structure for a rotary compressor and a rotary compressor, which can increase the connection length between the exhaust pipe body and the oil distribution pipe, thereby increasing the weld penetration depth between the exhaust pipe body and the oil distribution pipe, ensuring welding quality, improving welding strength, and thus reducing the probability of compressor failure due to leakage at the weld.

[0006] To achieve the above objectives, this utility model provides an exhaust pipe structure for a rotary compressor, comprising:

[0007] The exhaust pipe body has holes for connecting the oil equalization pipe.

[0008] A reinforcing structure is provided on the exhaust pipe body, the reinforcing structure being used to increase the connection length between the hole and the oil distribution pipe.

[0009] Optionally, the reinforcing structure includes a flanged structure, which is formed by flanges extending outward from the hole toward the exhaust pipe body.

[0010] Optionally, the connection length is the sum of the wall thickness of the exhaust pipe body and the flange height of the flange structure, and the ratio of the wall thickness of the exhaust pipe body to the flange height of the flange structure ranges from 0.2 to 1.1.

[0011] Optionally, the reinforcement structure includes a reinforcement sleeve, which is sleeved on the exhaust pipe body and positioned at the hole, and the reinforcement sleeve has a through hole corresponding to the position of the hole.

[0012] Optionally, the shape and size of the through hole of the reinforcing sleeve match the shape and size of the hole in the exhaust pipe body.

[0013] Optionally, the connection length is the sum of the wall thickness of the exhaust pipe body and the wall thickness of the reinforcing sleeve, and the ratio of the wall thickness of the exhaust pipe body to the wall thickness of the reinforcing sleeve ranges from 0.2 to 1.1.

[0014] Optionally, the reinforcing sleeve is made of copper or steel.

[0015] Optionally, the reinforcing structure is a partially thickened portion of the exhaust pipe body, the hole is located in the partially thickened portion, and the connection length is the wall thickness of the partially thickened portion.

[0016] Optionally, the exhaust pipe body includes a large-diameter section and a small-diameter section. The large-diameter section of the exhaust pipe body is used to connect with the compressor housing. The small-diameter section of the exhaust pipe body is made of copper, and the large-diameter section of the exhaust pipe body is made of copper or steel.

[0017] As configured above, the exhaust pipe structure for the rotary compressor of this utility model includes an exhaust pipe body and a reinforcing structure. The exhaust pipe body is provided with a hole for connecting an oil equalization pipe. The reinforcing structure is disposed on the exhaust pipe body and is used to increase the connection length between the hole and the oil equalization pipe.

[0018] In summary, this utility model, by setting a reinforced structure, increases the connection length between the hole and the oil distribution pipe, thereby increasing the welding penetration depth between the hole and the oil distribution pipe, ensuring welding quality, improving welding strength, and greatly reducing the probability of fatigue cracking or sealing failure at the weld. This reduces the probability of leakage at the weld leading to compressor failure, ensuring reliable and safe operation of the compressor, and extending the compressor's service life.

[0019] According to another aspect of the present invention, the present invention also provides a rotary compressor, which includes the exhaust pipe structure as described above.

[0020] Since the rotary compressor provided by this utility model and the exhaust pipe structure for the rotary compressor provided by this utility model belong to the same inventive concept, the rotary compressor provided by this utility model has at least all the advantages of the exhaust pipe structure provided by this utility model. For the advantages of the rotary compressor provided by this utility model, please refer to the relevant description of the beneficial effects of the exhaust pipe structure provided by this utility model, which will not be repeated here. Attached Figure Description

[0021] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

[0022] Figure 1 This is a schematic diagram of the exhaust pipe structure of a rotary compressor according to an embodiment of the present invention, which adopts a flanged structure.

[0023] Figure 2 This is a schematic diagram of the exhaust pipe structure of a rotary compressor according to an embodiment of the present invention, which uses a reinforced sleeve.

[0024] The accompanying figure is labeled as follows:

[0025] 1-Exhaust pipe body; 11-Hole; 12-Large diameter section; 13-Small diameter section; 2-Flanged structure; 3-Reinforcing sleeve; 31-Through hole. Detailed Implementation

[0026] In this document, unless otherwise stated, the terms “upper,” “lower,” “left,” “right,” “inner,” “outer,” “front,” “back,” “top,” “bottom,” etc., are used to indicate orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a characteristic orientation and operation, and therefore should not be construed as a limitation of the present invention.

[0027] The specific embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0028] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.

[0029] Figure 1This is a schematic diagram of the exhaust pipe structure of a rotary compressor according to an embodiment of the present invention, which adopts a flanged structure. Figure 2 This is a schematic diagram of a rotary compressor exhaust pipe structure with a reinforced sleeve according to an embodiment of this utility model. Please refer to it. Figure 1 and Figure 2 This utility model provides an exhaust pipe structure for a rotary compressor, including an exhaust pipe body 1 and a reinforcing structure. It is understood that one end of the exhaust pipe body 1 is used to connect to the compressor housing.

[0030] The exhaust pipe body 1 is provided with a hole 11 for connecting the oil distribution pipe. Usually, the oil distribution pipe is welded to the exhaust pipe body 1 at the hole 11. In order to enhance the welding strength, this utility model proposes to improve the welding by increasing the welding penetration.

[0031] A reinforcing structure is provided on the exhaust pipe body 1. This reinforcing structure increases the connection length between the hole 11 and the oil distribution pipe. It is understood that increasing the connection length increases the weld penetration, thereby ensuring weld quality, improving weld strength, and reducing the probability of compressor failure due to leakage at the weld. In this embodiment, the ratio of the wall thickness of the exhaust pipe body 1 to the thickness increased by the reinforcing structure is set to 0.2–1.1.

[0032] For example, the connection length can be increased by flanging the hole 11. In this case, the reinforcing structure includes a flanging structure 2, which is formed by flanging the hole 11 outwards towards the exhaust pipe body 1. In this case, the connection length is the sum of the wall thickness t1 of the exhaust pipe body 1 and the flanging height L1 of the flanging structure 2. The ratio of the wall thickness t1 of the exhaust pipe body 1 to the flanging height L1 of the flanging structure 2 ranges from 0.2 to 1.1, i.e., t1 / L1 is 0.2 to 1.1. It is understood that the flanging height is defined as the distance from the original plate surface to the top edge of the flanging after the hole is flanged. The wall thickness t1 of the exhaust pipe body 1 and the flanging height L1 of the flanging structure 2 are as follows... Figure 1 As shown.

[0033] In some embodiments, the reinforcement structure includes a reinforcement sleeve 3, which can increase the connection length. In this case, the reinforcement sleeve 3 is sleeved on the exhaust pipe body 1 and positioned at the hole 11. The reinforcement sleeve 3 has a through hole 31 corresponding to the position of the hole 11. Further, the shape and size of the through hole 31 of the reinforcement sleeve 3 match the shape and size of the hole 11 of the exhaust pipe body 1, so that the through hole 31 and the hole 11 are smoothly connected, facilitating subsequent welding of the oil distribution pipe. At this time, the connection length is the sum of the wall thickness t2 of the exhaust pipe body 1 and the wall thickness L2 of the reinforcement sleeve 3. The ratio of the wall thickness t2 of the exhaust pipe body 1 to the wall thickness L2 of the reinforcement sleeve 3 is in the range of 0.2 to 1.1, that is, t2 / L2 is 0.2 to 1.1. Figure 2 As shown. Further, the reinforcing sleeve 3 can be fixed to the exhaust pipe body 1 in various ways, such as by heating and then cooling for fixation, or by welding followed by further processing. Preferably, the reinforcing sleeve 3 is a metal pipe; for example, the material of the reinforcing sleeve 3 is copper or steel, and the material grade is not limited.

[0034] In some embodiments, the connection length can be increased by locally thickening the area around the hole 11 in the exhaust pipe body 1. In this case, the reinforcing structure is a locally thickened portion of the exhaust pipe body 1, the hole 11 is located in the locally thickened portion, and the connection length is the wall thickness of the locally thickened portion.

[0035] Preferably, the exhaust pipe body 1 includes a large-diameter section 12 and a small-diameter section 13, with the large-diameter section 12 connecting to the compressor housing. Further, the exhaust pipe body 1 includes a transition section, through which the large-diameter section 12 connects to the small-diameter section 13. The transition section is tapered to facilitate the transition from the large-diameter section 12 to the small-diameter section 13. The connection of the large-diameter section 12 to the compressor housing increases the cross-sectional area for refrigerant flow within the large-diameter section 12, reducing the flow velocity of the gaseous refrigerant and consequently reducing the amount of lubricating oil flowing out with the refrigerant, thus lowering the oil output rate of the rotary compressor. The small-diameter section 13 of the exhaust pipe body 1 connects to the air conditioning system piping, thus preventing any impact on the vibration of the system piping. The small-diameter section 13 of the exhaust pipe body 1 is made of copper, while the large-diameter section 12 is made of either copper or steel; the material grade is not limited. The hole 11 can be located on either the large-diameter section 12 or the small-diameter section 13.

[0036] As configured above, the exhaust pipe structure for the rotary compressor of this utility model includes an exhaust pipe body 1 and a reinforcing structure. The exhaust pipe body 1 is provided with a hole 11 for connecting an oil equalization pipe. The reinforcing structure is provided on the exhaust pipe body 1 and is used to increase the connection length between the hole 11 and the oil equalization pipe.

[0037] In summary, by setting up a reinforced structure, this utility model increases the connection length between the hole 11 and the oil distribution pipe, thereby increasing the welding penetration depth between the hole 11 and the oil distribution pipe, ensuring welding quality, improving welding strength, and greatly reducing the probability of fatigue cracking or sealing failure at the weld. This reduces the probability of leakage at the weld leading to compressor failure, ensuring reliable and safe operation of the compressor, and extending the compressor's service life.

[0038] According to another aspect of the present invention, the present invention also provides a rotary compressor, which includes the exhaust pipe structure as described above.

[0039] Since the rotary compressor provided by this utility model and the exhaust pipe structure for the rotary compressor provided by this utility model belong to the same inventive concept, the rotary compressor provided by this utility model has at least all the advantages of the exhaust pipe structure provided by this utility model. For the advantages of the rotary compressor provided by this utility model, please refer to the relevant description of the beneficial effects of the exhaust pipe structure provided by this utility model, which will not be repeated here.

[0040] It should be noted that references to "an embodiment," "an embodiment," "a specific embodiment," "some embodiments," etc., in the specification only indicate that the described embodiment may include a specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Additionally, when a specific feature, structure, or characteristic is described in conjunction with an embodiment, whether explicitly described or not, implementing such a feature, structure, or characteristic in conjunction with other embodiments is within the knowledge of those skilled in the art.

[0041] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0042] It should also be noted that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention without departing from the scope of the present invention, or equivalent embodiments can be modified based on the disclosed technical content. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the protection scope of the present invention.

[0043] It should also be understood that, unless otherwise specified or indicated, the terms “first,” “second,” “third,” etc., in the specification are used only to distinguish the various components, elements, and steps in the specification, and not to indicate the logical or sequential relationships between the various components, elements, and steps.

[0044] Furthermore, it should be recognized that the terminology described herein is used only to describe particular embodiments and not to limit the scope of the invention. It must be noted that the singular forms “a” and “an” used herein and in the appended claims include plural bases unless the context clearly indicates otherwise. For example, a reference to “a step” or “an apparatus” means a reference to one or more steps or apparatuses, and may include secondary steps and secondary apparatuses. All conjunctions used should be understood in the broadest sense. Also, the word “or” should be understood to have the definition of logical “or” rather than logical “exclusive OR”, unless the context clearly indicates otherwise. Furthermore, implementation of the methods and / or devices in embodiments of the invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. An exhaust pipe structure for a rotary compressor, characterized in that, include: The exhaust pipe body has holes for connecting the oil equalization pipe. A reinforcing structure is provided on the exhaust pipe body, the reinforcing structure being used to increase the connection length between the hole and the oil distribution pipe.

2. The exhaust pipe structure for a rotary compressor as described in claim 1, characterized in that, The reinforcement structure includes a flanged structure, which is formed by flanges extending outward from the hole toward the exhaust pipe body.

3. The exhaust pipe structure for a rotary compressor as described in claim 2, characterized in that, The connection length is the sum of the wall thickness of the exhaust pipe body and the flange height of the flange structure, and the ratio of the wall thickness of the exhaust pipe body to the flange height of the flange structure ranges from 0.2 to 1.

1.

4. The exhaust pipe structure for a rotary compressor as described in claim 1, characterized in that, The reinforcement structure includes a reinforcement sleeve, which is sleeved on the exhaust pipe body and positioned at the hole. The reinforcement sleeve has a through hole corresponding to the position of the hole.

5. The exhaust pipe structure for a rotary compressor as described in claim 4, characterized in that, The shape and size of the through hole of the reinforcing sleeve match the shape and size of the hole in the exhaust pipe body.

6. The exhaust pipe structure for a rotary compressor as described in claim 4, characterized in that, The connection length is the sum of the wall thickness of the exhaust pipe body and the wall thickness of the reinforcing sleeve, and the ratio of the wall thickness of the exhaust pipe body to the wall thickness of the reinforcing sleeve ranges from 0.2 to 1.

1.

7. The exhaust pipe structure for a rotary compressor as described in claim 4, characterized in that, The reinforcing sleeve is made of copper or steel.

8. The exhaust pipe structure for a rotary compressor as described in claim 1, characterized in that, The reinforcement structure is a locally thickened part of the exhaust pipe body, the hole is located in the locally thickened part, and the connection length is the wall thickness of the locally thickened part.

9. The exhaust pipe structure for a rotary compressor as described in claim 1, characterized in that, The exhaust pipe body includes a large-diameter section and a small-diameter section. The large-diameter section of the exhaust pipe body is used to connect with the compressor housing. The small-diameter section of the exhaust pipe body is made of copper, and the large-diameter section of the exhaust pipe body is made of copper or steel.

10. A rotary compressor, characterized in that, The rotary compressor includes an exhaust pipe structure as described in any one of claims 1-9.

Images