Compressor and refrigeration equipment
By designing gradually expanding welding holes on the compressor shell and fully filling the solder during welding, the problem of compressive strength under high pressure in the cross-critical refrigeration cycle of CO2 is solved, and higher welding reliability and compressive strength are achieved.
Patent Information
- Application Number
- CN202421872780.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-02
Smart Images
Figure CN223035252U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressors, and particularly to a compressor and a refrigeration device. Background Art
[0002] With the increasingly serious environmental crisis caused by global climate change, people pay more and more attention to environmental protection issues. The use of refrigerant has a great impact on environmental pollution. Therefore, reducing the amount of refrigerant used or even finding new substitutes has become an issue that has been concerned. The ozone depletion potential (ODP) of CO2 is 0, and the global warming potential (GWP) is 1, which is much lower than that of other refrigerants. At the same time, CO2 is non-toxic, non-flammable, and has stable chemical properties, which can ensure the safety of personnel and food during the operation of the equipment.
[0003] The working pressure of the CO2 transcritical refrigeration cycle is about 6-8 times that of traditional refrigerants, which poses a safety hazard. Therefore, it is necessary to ensure the pressure resistance strength when designing, manufacturing, and installing the compressor. Summary of the Utility Model
[0004] The main purpose of the utility model is to propose a compressor and a refrigeration device, aiming to provide a compressor that can ensure the pressure resistance strength of the compressor.
[0005] To achieve the above object, the compressor proposed by the utility model includes:
[0006] A housing, at least one welding hole is penetrated through the housing, the welding hole includes a first hole section and a second hole section arranged in sequence from inside to outside along the wall thickness direction of the housing, and the aperture of the second hole section is at least partially tapered outward.
[0007] A fixing member, fixed to the housing and corresponding to the welding hole.
[0008] In an embodiment, the second hole section is arranged as a tapered hole section.
[0009] In an embodiment, the taper angle of the tapered hole section is α, and 50° ≤ α ≤ 100°.
[0010] In an embodiment, the first hole section is arranged as a straight hole section.
[0011] In an embodiment, the diameter of the first hole section is D, the depth of the welding hole is T, and D ≤ T.
[0012] In an embodiment, D ≥ 4 mm.
[0013] In an embodiment, the depth of the first hole section is L, the depth of the welding hole is T, and 1 / 3*T ≤ L ≤ 2 / 3*T.
[0014] In one embodiment, the wall thickness of the outer shell is d, where 6 mm ≤ d ≤ 8 mm.
[0015] In one embodiment, the compressor includes a carbon dioxide compressor.
[0016] The present utility model also provides a refrigeration device, which includes a compressor, and the compressor includes:
[0017] An outer shell that is provided with at least one welding hole. The welding hole includes a first hole section and a second hole section that are arranged in sequence from the inside to the outside along the wall thickness direction of the outer shell. The aperture of the second hole section is at least partially tapered in the outward direction.
[0018] A fixing component that is fixed to the outer shell and is arranged corresponding to the welding hole.
[0019] In the technical solution of the present utility model, when welding the fixing component to the outer shell, the fixing component is arranged corresponding to the welding hole, and solder is filled in the welding hole. Since the aperture of the second hole section is at least partially tapered in the outward direction, more solder can be accommodated in the corresponding second hole section, ensuring that the weld area is fully filled. The welding surface between the outer shell and the fixing component is also increased accordingly, improving the welding reliability. When the pressure inside the outer shell is relatively high, the reliable connection and pressure resistance strength between the fixing component and the outer shell are ensured. Description of the Drawings
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0021] Figure 1 It is a schematic structural diagram of an embodiment of the outer shell provided by the present utility model;
[0022] Figure 2 For Figure 1 A side view of the outer shell in
[0023] Figure 3 For Figure 2 A cross-sectional view taken along A-A in
[0024] Figure 4 For Figure 3 A partial enlarged view at B in
[0025] Explanation of the reference numerals in the drawings:
[0026] 100. Outer shell; a. Welding hole; a1. First hole section; a2. Second hole section.
[0027] The realization of the purpose, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments
[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work belong to the scope of protection of the present utility model.
[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0030] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0031] With the increasingly severe environmental crisis caused by global climate change, people are paying more and more attention to environmental protection issues. The use of refrigerant has a great impact on environmental pollution. Therefore, reducing the amount of refrigerant used or even finding new alternatives has become an issue that has been concerned about. The ozone depletion potential ODP of CO2 is 0, and the global warming potential GWP is 1, which is much lower than other refrigerants. At the same time, CO2 is non-toxic, non-flammable, and has stable chemical properties, ensuring the safety of personnel and food during the operation of the equipment. The working pressure of the CO2 transcritical refrigeration cycle is about 6 to 8 times that of traditional refrigerants, presenting potential safety hazards. Therefore, it is necessary to ensure its pressure resistance when designing, manufacturing, and installing the compressor.
[0032] The present utility model provides a compressor, aiming to provide a compressor that can ensure the pressure resistance strength of the compressor.
[0033] Please refer to Figures 1 to 4 , in an embodiment of the present utility model, the compressor includes a housing 100 and a fixing component (not shown in the figure). At least one welding hole a penetrates through the housing 100. The welding hole a includes a first hole section a1 and a second hole section a2 arranged in sequence from the inside to the outside along the wall thickness direction of the housing 100. The aperture of the second hole section a2 is at least partially tapered outward. The fixing component is fixed to the housing 100 and is arranged corresponding to the welding hole a.
[0034] The housing 100 can be applied to ordinary compressors or carbon dioxide compressors. When CO2 is used as a refrigerant, in order to achieve effective cooling, its pressure in the condenser must be much higher than the ambient pressure, usually 70 - 100 bar or higher. This is because CO2 has a relatively high critical point and requires a higher pressure to condense it. In contrast, traditional Freon refrigerants can condense at a lower pressure. For example, the condensation pressure of R134a is about 14 bar. Therefore, a compressor using CO2 as a refrigerant medium needs to be designed to withstand higher pressures, which means higher requirements for the mechanical strength, sealing performance, and material selection of the compressor.
[0035] It should be noted that the welding hole a refers to the hole opened for welding with the fixing component. When welding the fixing component to the housing, first align the fixing component with the welding hole a, fill the welding hole a with solder, and use welding equipment (such as TIG welding, MIG welding, resistance welding, etc.) to heat the welding area until the solder melts to form a molten solder and flows into the gap between the fixing component and the housing 100.
[0036] When the materials of the housing 100 and the fixing component are both set to materials that can be melted, the hole wall surface of the welding hole a, the fixing component, and the solder melt and fuse together under heating to form a weld seam, connecting the fixing component to the housing 100.
[0037] When the material of the fixing component is set to a non - meltable material (such as cast iron), generally a positioning groove is provided on the fixing component corresponding to the welding hole. After the inner wall of the welding hole a and the solder melt together, they will fill into the positioning groove, thereby forming a positioning protrusion, enabling the fixing component to form a positioning fit with the housing and realizing the fixation between the two.
[0038] It can be understood that the aperture of the second hole section a2 is at least partially tapered in the outward direction. The shape of the second hole section a2 is not a straight cylinder, but at least partially has a certain taper, and the diameter at the hole opening is larger than the inner diameter of the hole. From the cross-section view, the side wall of the second hole section a2 can be set as an inclined straight line, or an inclined arc, and of course it can also be an irregular line formed by connecting multiple curves. Specifically, it can be designed according to the actual situation, and the embodiments of this specification do not limit this.
[0039] Compared with setting it as a straight hole, the annular inclined surface formed by the second hole section a2 enables the solder to be better distributed, forming a wider weld seam, thereby improving the strength and stability of the welding. The slope of the side wall of the second hole section a2 helps the solder to better wet and flow.
[0040] It should also be noted that the fixing component can be an electrical bracket arranged in the housing 100 of the compressor for fixing electrical connections, or a support for supporting certain components of the compressor, such as a support for the compression chamber or the motor, etc. Of course, it can also be other components that need to be welded to the housing 100. Specifically, it can be determined according to the actual situation, and the embodiments of this specification do not limit this.
[0041] In the technical solution of the present utility model, when welding the fixing component to the housing 100, the fixing component is arranged corresponding to the welding hole a, and solder is filled in the welding hole a. Since the aperture of the second hole section a2 is at least partially tapered in the outward direction, more solder can be accommodated in the corresponding second hole section a2, ensuring that the weld area is fully filled, improving the welding reliability. When the pressure in the housing 100 is relatively high, it ensures a reliable connection and pressure resistance strength between the fixing component and the housing 100.
[0042] Specifically, in this embodiment, the second hole section a2 is set as a tapered hole section. Since the shape of the tapered hole is relatively regular, it can usually be directly processed by conventional machining methods such as drilling, reaming, boring, or turning, which can ensure high machining accuracy and good repeatability. It avoids the need for special tools for processing special-shaped holes, increasing the manufacturing difficulty and cost, as well as the complexity of the processing process.
[0043] In this embodiment, the taper angle of the tapered hole section is α, and 50° ≤ α ≤ 100°. It can be understood that on the premise that the depth of the tapered hole section is certain, the larger the taper angle of the tapered hole section, the more the volume of the second hole section a2 for holding the welding liquid, and the smaller the taper angle of the tapered hole section, the less the volume of the second hole section a2 for holding the welding liquid, and the smaller the welding surface.
[0044] It should be noted that when the fixed component and the housing 100 are joined by rapid welding technology for about 2 - 3 seconds, if the inner wall surface of the welding hole and the solder cannot achieve complete fusion within a short welding time, unfused regions will appear in the weld seam, affecting the strength and quality of the welding; and the solder may only melt in a certain part of the weld seam, resulting in uneven distribution of the weld seam, which will affect the reliability and consistency of the welded structure.
[0045] In this way, by setting the taper angle of the tapered hole section within the range of 50° to 100°, it can ensure that the solder filled into the welding hole a can be fully melted under the condition that the welding duration remains unchanged; it can avoid the situation where the taper angle is too small and the effect of increasing the welding strength is not obvious, and also avoid the situation where the taper angle is too large, which may cause various problems and defects due to insufficient melting of the solder.
[0046] In this embodiment, the first hole section a1 is set as a straight hole section. This is to maintain the coherence of filling the first hole section a1 and the second hole section a2 after the solder melts, and setting the first hole section a1 as a straight hole section can be easily processed by standard drilling tools and is easier to manufacture.
[0047] Furthermore, in this embodiment, the diameter of the first hole section a1 is D, and the depth of the welding hole a is T, with D ≤ T. In this way, while setting the diameter of the first hole section a1 to be larger than the diameter of the fixed component, and setting its diameter to be smaller than the depth of the welding hole a, it can avoid the situation where the diameter of the first hole section a1 is too large, the second hole section a2 is even larger, and the welding hole a is too large, resulting in a greater amount of solder required for filling. Under the condition of a certain welding duration, the solder cannot be fully melted, and the fixed component, the inner wall surface of the welding hole a, and the solder cannot be fully fused, affecting the reliability and consistency of the welded structure.
[0048] Specifically, in this embodiment, D ≥ 4mm. In this way, it can avoid the situation where when the diameter of the first hole section a1 is too small, the solder cannot completely penetrate the welding hole, resulting in the problem of incomplete penetration. Incomplete penetration will also lead to insufficient weld strength and may cause cracks or fractures when stressed. Moreover, if the diameter of the first hole section a1 is set too small, the cross-sectional area of the weld seam will also be smaller, thus reducing the mechanical strength of the welded part.
[0049] Setting the diameter of the first hole section a1 within the range of greater than or equal to 4mm can ensure that the size of the welding hole is appropriate, which can not only accommodate enough solder but also ensure the strength and quality of the weld seam and guarantee the mechanical strength of the welded part.
[0050] Furthermore, in this embodiment, the depth of the first hole section a1 is L, and the depth of the welding hole a is T, with 1 / 3*T ≤ L ≤ 2 / 3*T.
[0051] When the depth of the welding hole a is fixed, the greater the hole depth of the first hole section a1, the smaller the hole depth of the second hole section a2. Conversely, the smaller the hole depth of the first hole section a1, the greater the hole depth of the second hole section a2. Then, when the hole depth of the first hole section a1 is smaller, more solder is required to be filled in the second hole section a2. In order to reasonably distribute the hole depths of the first hole section a1 and the second hole section a2 so that both hole sections can play a positive role, setting the hole depth of the first hole section a1 between 1 / 3 and 2 / 3 of the welding hole a can make the hole depth of the second hole section a2 within a reasonable range, ensuring the full melting of the inner wall surface of the welding hole a and the solder.
[0052] Specifically, since the carbon dioxide compressor needs to withstand high pressure during operation, especially when carbon dioxide is in a supercritical state, the pressure can be as high as 70 - 100 bar or higher. Therefore, the housing needs to have a sufficient wall thickness to withstand this pressure. In this embodiment, the wall thickness of the outer housing 100 is d, and 6 mm ≤ d ≤ 8 mm, so as to ensure that it can operate safely and reliably under the expected working conditions.
[0053] Of course, when the compressor is in different working conditions, or when the material of the outer housing 100 is set to (carbon steel, stainless steel or other alloys) with different yield strengths and tensile strengths, the minimum wall thickness of the outer housing 100 under a specific pressure can also be appropriately adjusted to ensure that the outer housing 100 does not undergo plastic deformation or rupture. For carbon dioxide compressors for different purposes, the wall thickness of the housing may be between a few millimeters and more than a dozen millimeters. Those skilled in the art, inspired by the technical essence of the embodiments of this specification, may also make other changes, but as long as the functions and effects achieved are the same as or similar to those of the embodiments of this specification, they should all be covered within the protection scope of the embodiments of this specification.
[0054] It should also be noted that multiple welding holes a can be provided on the outer housing 100, and the sizes of the respective welding holes a can be set differently to adapt to different fixing components. The sizes and shapes of the respective welding holes a can be set differently, and only the parameter requirements of the respective welding holes a need to be configured according to the above requirements.
[0055] Specifically, the compressor includes a carbon dioxide compressor. A carbon dioxide compressor is a special compressor that uses carbon dioxide as a working medium and is usually used in a refrigeration system called "carbon dioxide transcritical cycle", which has no destructive effect on the ozone layer. In some application scenarios, the carbon dioxide system can achieve higher energy efficiency than traditional refrigeration systems.
[0056] The present utility model also provides a refrigeration device, which can be an air conditioner, a refrigerator, or the like. The refrigeration device includes a compressor and a heat exchanger. The specific structure of the compressor can be referred to the above embodiments. Since this refrigeration device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.
[0057] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.
Claims
1. A compressor, characterized in that: include: A shell, wherein the shell is provided with at least one welding hole, the welding hole comprises a first hole section and a second hole section arranged in sequence from the inside to the outside along the wall thickness direction of the shell, and the aperture of the second hole section is at least partially gradually expanded in the outward direction; and, A fixing component is fixed to the housing and is arranged corresponding to the welding hole.
2. The compressor according to claim 1, characterized in that The second hole segment is configured as a tapered hole segment.
3. The compressor according to claim 2, characterized in that The cone angle of the conical hole section is α, 50°≤α≤100°.
4. The compressor according to any one of claims 1 to 3, characterized in that The first hole section is configured as a straight hole section.
5. The compressor according to claim 4, characterized in that The diameter of the first hole segment is D, the depth of the welding hole is T, and D≤T.
6. The compressor according to claim 5, characterized in that D≥4mm.
7. The compressor according to claim 4, characterized in that The hole depth of the first hole segment is L, the hole depth of the welding hole is T, and 1 / 3*T≤L≤2 / 3*T.
8. The compressor according to any one of claims 1 to 7, characterized in that: The wall thickness of the compressor is d, 6mm≤d≤8mm.
9. The compressor according to any one of claims 1 to 8, characterized in that: The compressor comprises a carbon dioxide compressor.
10. A refrigeration device, characterized in that: Comprising a compressor as claimed in any one of claims 1 to 9.