Compressor and refrigeration equipment

Abstract

The utility model discloses a compressor and refrigeration equipment relates to compressor technical field, the compressor includes shell and conduit, the shell is equipped with the welding hole along its wall thickness direction, the welding hole along the wall thickness direction of shell is equipped with the first hole section and the second hole section in proper order from outside to inside, the first hole section is equipped with the first hole section, the second hole section is equipped with the second hole section. At least part of the hole diameter of the first hole section is expanded outwards in the outward direction, so that more welding flux can be contained in the welding hole compared with the welding flux contained in a straight hole, the welding face is enlarged, the welding reliability is improved, and the second hole section is arranged to be a straight hole section. The guide pipe is arranged in the welding hole in a penetrating mode, the second hole section and the guide pipe form surface contact to provide stable support for the guide pipe, the guide pipe is welded to the inner wall of the welding hole, good sealing performance is guaranteed, gas leakage is prevented, and when the pressure in the shell is large, the guide pipe is not prone to falling off. And reliable connection and compression strength between the fixing part and the shell are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and particularly relates to a compressor and a refrigeration device. Background Art

[0002] With the increasing environmental crisis caused by global climate change, people pay more and more attention to environmental protection. 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. 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 chemically stable, ensuring 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, presenting potential safety hazards. Therefore, when designing, manufacturing, and installing the compressor, it is necessary to ensure its pressure resistance strength. 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 purpose, the compressor proposed by the utility model includes:

[0006] A housing, which is provided with a welding hole penetrating along its wall thickness direction. The welding hole is provided with a first hole section and a second hole section arranged in sequence from outside to inside along the wall thickness direction of the housing. At least part of the first hole section is outwardly expanded in the outward direction, and the second hole section is set as a straight hole section; and,

[0007] A conduit, which is penetrated through the welding hole and is used for being communicated with a cylinder arranged inside the housing. The conduit is welded to the inner wall of the welding hole.

[0008] In one embodiment, at least part of the first hole section is gradually expanded in the outward direction.

[0009] In one embodiment, the first hole section is set as a tapered hole section.

[0010] In one embodiment, the first hole section is set as at least one stepped hole section.

[0011] In one embodiment, the length of the first hole section is L1, and the length of the second hole section is L2, and L1 ≤ L2.

[0012] In one embodiment, 0.1 ≤ L1 / L2 ≤ 1.

[0013] In one embodiment, the diameter of the second hole section is D2, the outer diameter of the conduit is D3, and 0.06 mm ≤ (D2 - D3) / 2 ≤ 0.15 mm.

[0014] In one embodiment, the housing is annularly arranged, the wall thickness of the housing is T, the inner diameter of the housing is D, and 0.03 ≤ T / D ≤ 0.1.

[0015] In one embodiment, the wall thickness of the housing is T, and 6 mm ≤ T ≤ 8 mm.

[0016] In one embodiment, the compressor includes a carbon dioxide compressor.

[0017] The present utility model also provides a refrigeration device, which includes a compressor, and the compressor includes:

[0018] A housing, a welding hole is provided through the housing along its wall thickness direction, the welding hole is sequentially provided with a first hole section and a second hole section from outside to inside along the wall thickness direction of the housing, at least part of the first hole section is outwardly expanded in the outward direction, and the second hole section is set as a straight hole section; and,

[0019] A conduit, the conduit is disposed through the welding hole and is used to communicate with a cylinder disposed inside the housing, and the conduit is welded to the inner wall of the welding hole.

[0020] In the technical solution of the present utility model, when welding the conduit to the housing, the conduit is disposed through the welding hole, and molten solder is filled in the welding hole. Since the aperture of the first hole section is outwardly expanded in the outward direction, the amount of solder that can be accommodated in the welding hole is more than that when the hole is set as a straight hole, increasing the welding surface and improving the welding reliability; the second hole section is set as a straight hole section, forming a surface contact with the conduit, providing stable support for the conduit, and the conduit and the inner wall of the welding hole are welded to ensure that the conduit is firmly connected to the housing, and good sealing performance is ensured to prevent gas leakage. When the pressure inside the housing is relatively high, reliable connection and pressure resistance strength between the fixed component and the housing are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0022] Figure 1Partial structural cross-sectional schematic diagram of an embodiment of the compressor provided by the present utility model;

[0023] Figure 2 It is Figure 1 Cross-sectional schematic diagram of the middle housing;

[0024] Figure 3 It is Figure 2 Local enlarged view at position A in the middle;

[0025] Figure 4 It is Figure 1 Stereo schematic diagram of the middle housing;

[0026] Figure 5 It is Figure 1 Graph of the pressure resistance strength of the compressor in it and the relationship between L1 / L2.

[0027] Explanation of the reference numerals in the drawings:

[0028] 1. Housing; a. Welding hole; a1. First hole section; a2. Second hole section; 2. Conduit.

[0029] The realization of the purpose, functional characteristics and advantages of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with 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 of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0031] 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, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If the specific posture changes, then the directional indications will also change accordingly.

[0032] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various 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 results in contradictions or inability to implement, 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.

[0033] As the environmental crisis caused by global climate change intensifies day by day, 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 alternatives has become an issue of continuous concern. 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, 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, when designing, manufacturing, and installing the compressor, it is necessary to ensure its pressure resistance strength.

[0034] The present utility model provides a compressor, aiming to provide a compressor that can ensure the pressure resistance strength of the compressor. Figure 1 It is a partial structural cross-sectional view of an embodiment of the compressor provided by the present utility model;

[0035] Figure 2 is Figure 1 the cross-sectional view of the middle housing; Figure 3 is Figure 2 the partial enlarged view at A in Figure 4 is Figure 1 the three-dimensional view of the middle housing; Figure 5 is Figure 1 the relationship diagram between the pressure resistance strength of the compressor in

[0036] Please refer to Figures 1 to 4, in an embodiment of the present utility model, the compressor includes a housing 1 and a conduit 2. The housing 1 is penetrated with a welding hole a along its wall thickness direction. The welding hole a is successively provided with a first hole section a1 and a second hole section a2 along the wall thickness direction of the housing 1 from outside to inside. The aperture of the first hole section a1 is at least partially expanded in the outward direction, and the second hole section a2 is set as a straight hole section. The conduit 2 is inserted through the welding hole a and is used to communicate with a cylinder arranged inside the housing 1, and the conduit 2 is welded to the inner wall of the welding hole a.

[0037] It should be noted that the housing 1 is an external protective housing of the compressor, which is used to protect internal components and provide a closed space to accommodate components such as motors and compression cylinders.

[0038] The conduit 2 is inserted through the welding hole a on the housing 1. The conduit 2 can be understood as a suction pipe connecting the intake port of the compression cylinder, or it can be a supplementary air pipe for supplementary air enthalpy increase. Of course, it can also be an exhaust pipe connected to a heat exchanger. Of course, the conduit 2 can also be used to connect the cylinder inside the housing 1 and other components outside the housing 1.

[0039] It should be noted that the welding hole a refers to a hole opened for welding with the conduit 2. When welding the conduit 2 to the housing, first insert the conduit 2 through the welding hole a, and then melt the solder and fill the gap between the welding hole a and the conduit 2.

[0040] It can be understood that the aperture of the first hole section a1 is at least partially expanded in the outward direction. Looking at the welding hole a in cross-section, the side wall of the first hole section a1 can be set as an inclined straight line, or it can be an inclined arc. Of course, it can also be an irregular line formed by connecting multiple curves. Specifically, it can be designed according to actual situations, and the embodiments of this specification do not limit this.

[0041] Compared with a straight hole, the expanded inner wall surface formed by the first hole section a1 can increase the contact area between the conduit 2 and the hole wall. The solder can be better distributed to form a wider weld seam, thereby improving the strength and stability of the welding. At the same time, the slope of at least part of the side wall of the welding hole a helps the solder to flow better.

[0042] It should also be noted that the second hole section a2 is set as a straight hole section, which can form a surface contact with the outer peripheral wall of the conduit 2. The second hole section a2 provides stable support for the conduit 2 after it passes through the welding hole a, ensuring that the position of the conduit 2 is accurate and not easy to move after installation.

[0043] In the technical solution of the present utility model, when welding the catheter 2 to the housing 1, the catheter 2 is passed through the welding hole a, and the melted solder is filled in the welding hole a. Since the aperture of the first hole section a1 is set to expand outward, more solder can be accommodated in the welding hole a than when it is set as a straight hole, increasing the welding surface and improving the welding reliability; the second hole section a2 is set as a straight hole section, forming a surface contact with the catheter 2, providing stable support for the catheter 2. The catheter 2 and the inner wall of the welding hole a are welded to ensure that the catheter 2 is firmly connected to the housing 1, and good sealing performance is ensured to prevent gas leakage. When the pressure in the housing 1 is relatively high, reliable connection and pressure resistance strength between the fixing component and the housing 1 are ensured.

[0044] Further, in this embodiment, at least a part of the first hole section a1 is set to expand gradually in the outward direction. The inner wall surface of the first hole section a1 forms a continuous guiding inclined surface, which is beneficial for the welding liquid to quickly flow to the first hole section a1.

[0045] In one embodiment, the first hole section a1 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. Avoiding the processing of special-shaped holes requires special tools, increasing the manufacturing difficulty and cost, as well as the complexity of the processing process.

[0046] In another embodiment, the first hole section a1 is set as at least a stepped hole section, and the aperture suddenly changes at one or more points, forming one or more stepped structures. The stepped hole section can enhance the welding strength by increasing the contact area between the catheter 2 and the hole wall, and provide additional support for the catheter 2 to ensure its more stable position after installation.

[0047] Further, please refer to Figures 3 to 5 , in this embodiment, the length of the first hole section a1 is L1, and the length of the second hole section a2 is L2, where L1 ≤ L2. In this way, with the limited wall thickness of the housing 1, setting the length of the second hole section a2 longer than the length of the first hole section a1 can ensure the contact area between the catheter 2 and the housing 1, and further improve the sealing performance and reliability of the welding between the two.

[0048] Furthermore, in this embodiment, 0.1 ≤ L1 / L2 ≤ 1. When the length of the first hole section a1 is too small, the effect of the first hole section a1 in expanding the welding surface is not significant, and the effect of increasing the welding strength is not obvious. Also, restricting the ratio range between the length of the first hole section a1 and the length of the second hole section a2 to be between 0.1 and 1 ensures that the catheter 2 meets the pressure resistance strength after being welded to the housing 1.

[0049] Furthermore, in this embodiment, the diameter of the second hole section a2 is D2, the outer diameter of the catheter 2 is D3, and 0.06 mm ≤ (D2 - D3) / 2 ≤ 0.15 mm. It can be understood that D2 - D3 is the gap size between the catheter 2 and the straight hole section. Setting the gap between the two to be between 0.06 mm and 0.15 mm can not only accommodate enough solder but also ensure the strength and quality of the weld seam, guarantee the mechanical strength of the welded part, and at the same time, facilitate the smooth flow of solder during welding to improve the welding quality.

[0050] Furthermore, in this embodiment, the housing 1 is annularly arranged, the wall thickness of the housing 1 is T, the inner diameter of the housing 1 is D, and 0.03 ≤ T / D ≤ 0.1.

[0051] It can be understood that the choice of the wall thickness directly affects the strength and durability of the compressor housing 1. An overly thin wall thickness may cause the housing 1 to deform or rupture under high-pressure environments, while an overly thick wall thickness will increase the weight and manufacturing cost.

[0052] A higher T / D ratio (close to 0.1) generally means stronger structural strength but may cause the compressor to become heavier, increasing the material cost; a lower T / D ratio (close to 0.03) helps to reduce the weight of the compressor, and the housing 1 is still strong enough to withstand the internal pressure.

[0053] Generally, when the ratio of the wall thickness to the inner diameter of the housing 1 is set within this range, the compressor is generally a thick-shell type compressor, which is more suitable for the compressor type using carbon dioxide as the refrigerant medium.

[0054] Specifically, since the carbon dioxide compressor needs to withstand high pressure during operation, especially when carbon dioxide is in the 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 housing 1 is d, and 6 mm ≤ d ≤ 8 mm. To ensure that it can operate safely and reliably under the expected working conditions.

[0055] Of course, when the compressor is in different operating conditions, or when the material of the housing 1 is set to (carbon steel, stainless steel or other alloys) with different yield strengths and tensile strengths, the minimum wall thickness of the housing 1 under a specific pressure can also be appropriately adjusted to ensure that the housing 1 does not undergo plastic deformation or rupture. For carbon dioxide compressors for different purposes, the wall thickness of the casing may be between a few millimeters and more than ten millimeters. Those skilled in the art may also make other changes under the inspiration of the technical essence of the embodiments of this specification. However, 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.

[0056] Specifically, the compressor includes a carbon dioxide compressor, which is a special compressor that uses carbon dioxide as the working medium and is usually used in a refrigeration system called "carbon dioxide transcritical cycle" and 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.

[0057] The present utility model also proposes a refrigeration device, which may be an air conditioner or a refrigerator, etc. The refrigeration device includes a compressor and a heat exchanger. The specific structure of the compressor refers to the above embodiments. Since this refrigeration device adopts all the technical solutions of the above all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0058] The above description 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 directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A compressor, characterized in that, Comprising: A housing, a welding hole is penetrated along the wall thickness direction of the housing, the welding hole is successively provided with a first hole section and a second hole section from outside to inside along the wall thickness direction of the housing, at least part of the first hole section is outwardly expanded in the outward direction, and the second hole section is set as a straight hole section; and, A conduit, the conduit is penetrated through the welding hole and is used for being communicated with a cylinder arranged in the housing, and the conduit is welded to the inner wall of the welding hole.

2. The compressor according to claim 1, characterized in that, At least part of the first hole section is gradually expanded in the outward direction.

3. The compressor according to claim 2, characterized in that, The first hole section is set as a tapered hole section.

4. The compressor according to claim 1, characterized in that, The first hole section is set as at least one stepped hole section.

5. The compressor according to claim 1, characterized in that, The length of the first hole section is L1, the length of the second hole section is L2, and L1 ≤ L2.

6. The compressor according to claim 5, characterized in that, 0.1 ≤ L1 / L2 ≤ 1.

7. The compressor according to claim 1, characterized in that, The diameter of the second hole section is D2, the outer diameter of the conduit is D3, and 0.06 mm ≤ D2 / 2 ≤ 0.15 mm.

8. The compressor according to claim 1, wherein, The housing is annularly arranged, the wall thickness of the housing is T, the inner diameter of the housing is D, and 0.03 ≤ T / D ≤ 0.

1.

9. The compressor according to claim 1, characterized in that, The wall thickness of the housing is T, and 6 mm ≤ T ≤ 8 mm.

10. The compressor according to any one of claims 1 to 9, characterized in that, The compressor includes a carbon dioxide compressor.

11. A refrigeration device, characterized in that, Including the compressor according to any one of claims 1 to 10.

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