Piping device and air conditioner having the same

Abstract

The application discloses a pipeline device and an air conditioner with the same. The pipeline device comprises a first pipeline assembly, a first pipeline and a first connecting sleeve arranged at an end of the first pipeline, the material of the first pipeline comprises a first metal, and the material of the first connecting sleeve comprises a second metal; and a second pipeline assembly, a second pipeline and a second connecting sleeve connected with the second pipeline, the material of the second connecting sleeve comprises the second metal, the inner wall surface of the second connecting sleeve comprises a welding cooperation surface and an anti-dripping extension surface, the first connecting sleeve is at least partially inserted into the second connecting sleeve and fixed with the welding cooperation surface, and the anti-dripping extension surface is arranged at one end of the welding cooperation surface away from the first connecting sleeve. According to the pipeline device, the excess welding material at the welding cooperation surface can be dripped to the anti-dripping extension surface, the anti-dripping extension surface can absorb the dripped welding material, and the welding material is prevented from further dripping to the lower components.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a pipeline device and an air conditioner having the same. BACKGROUND

[0002] In the related art, when two steel pipes are welded and fixed, the excess welding material at the welding position drops on the inner wall of the steel pipe and slides like water droplets. The sliding welding material enters the four-way valve and other components, which can easily cause the internal sliding components to be stuck or produce abnormal sound. SUMMARY

[0003] The present application aims to at least solve one of the above technical problems in the prior art. To this end, the present application proposes a pipeline device to prevent welding material from sliding along the inner wall of the steel pipe.

[0004] The present application also proposes an air conditioner having the above pipeline device.

[0005] According to the pipeline device of the present application, the first pipeline assembly includes a first pipeline and a first connecting sleeve arranged at the end of the first pipeline, the first connecting sleeve has a fitting part nested with the first pipeline, the material of the first pipeline includes a first metal, and the material of the first connecting sleeve includes a second metal. The second pipeline assembly includes a second pipeline and a second connecting sleeve connected with the second pipeline, the material of the second connecting sleeve includes the second metal, the inner wall surface of the second connecting sleeve includes a welding fitting surface and a drip-proof extension surface, the first connecting sleeve is at least partially inserted into the second connecting sleeve and fixed with the welding fitting surface, and the drip-proof extension surface is arranged at the end of the welding fitting surface away from the first connecting sleeve. The thermal conductivity of the second metal is higher than that of the first metal.

[0006] According to the pipeline device of the present application, by fixing the welding fitting surface of the second connecting sleeve with the first connecting sleeve and arranging the drip-proof extension surface at the end of the welding fitting surface away from the first connecting sleeve, the excess welding material at the welding fitting surface can be ensured to drop on the drip-proof extension surface, the drip-proof extension surface can absorb the dropped welding material, and the welding material is prevented from further dropping on the components below, thereby further preventing the internal sliding components of the components below from being stuck or producing abnormal sound.

[0007] According to some embodiments of the present application, the drip-proof extension surface has the same inner diameter as the welding fitting surface.

[0008] According to some embodiments of the present application, the material of the second pipeline includes the second metal, and the second connecting sleeve is integrally formed at the end of the second pipeline close to the first pipeline assembly.

[0009] Further, the second pipeline and the second connecting sleeve are different in pipe diameter, the second pipeline and the second connecting sleeve are connected through a second transition section, and an end of the drip-proof extension surface away from the welding fit surface extends to the second transition section.

[0010] According to some embodiments of the present application, the material of the second pipeline comprises the first metal, and the second connecting sleeve is nested with the second pipeline.

[0011] Specifically, the second pipeline comprises a second pipeline body and a second pipe diameter changing part arranged at an end of the second pipeline body, the second pipe diameter changing part is different in pipe diameter from the second pipeline body, the second pipeline body and the second pipe diameter changing part are connected through a third transition section, the second connecting sleeve is nested with the second pipe diameter changing part and is welded and fixed, and the drip-proof extension surface extends to the third transition section.

[0012] According to some embodiments of the present application, the length of the drip-proof extension surface is not less than the length of the welding fit surface.

[0013] According to some embodiments of the present application, the length of the drip-proof extension surface is not less than 10 mm.

[0014] According to some embodiments of the present application, a first protruding part is further arranged on the inner wall surface or the outer wall surface of the first connecting sleeve, and the first protruding part is positioned at the free end surface of the second connecting sleeve.

[0015] Optionally, the first protruding part is configured as a plurality of first protrusions arranged at intervals in the circumferential direction of the first connecting sleeve, or the first protruding part is configured as a first annular protrusion continuous in the circumferential direction of the first connecting sleeve.

[0016] According to some embodiments of the present application, a second protruding part is further arranged on the inner wall surface or the outer wall surface of the second connecting sleeve, and the second protruding part is positioned at the free end surface of the first connecting sleeve.

[0017] Further, the second protruding part separates the welding fit surface and the drip-proof extension surface in the axial direction of the pipeline device.

[0018] Optionally, the second protruding part is configured as a plurality of second protrusions arranged at intervals in the circumferential direction of the second connecting sleeve, or the second protruding part is configured as a second annular protrusion continuous in the circumferential direction of the second connecting sleeve.

[0019] According to some embodiments of the present application, the first pipe comprises a first pipe body and a first pipe diameter changing part arranged at an end of the first pipe body, a pipe diameter of the first pipe diameter changing part is different from a pipe diameter of the first pipe body, and the first connecting sleeve is nested with the first pipe diameter changing part and is welded and fixed.

[0020] According to some embodiments of the present application, the first pipe body and the first pipe diameter changing part are connected through a first transition section, and the first transition section is staggered with the welded joint surface in an axial direction of the pipe device.

[0021] Optionally, a minimum axial distance between the first transition section and the welded joint surface is not less than 18 mm.

[0022] According to some embodiments of the present application, an end surface of the first pipe diameter changing part is flush with an end surface of the first connecting sleeve.

[0023] According to some embodiments of the present application, the first connecting sleeve partially extends into the second connecting sleeve.

[0024] According to some embodiments of the present application, the first metal is iron, and / or the second metal is copper.

[0025] According to another aspect of the embodiments of the present application, an air conditioner comprises the above-mentioned pipe device.

[0026] The air conditioner has the same advantages as the above-mentioned pipe device relative to the prior art, and thus will not be described here again.

[0027] Additional aspects and advantages of the present application will be given, partially in the following description, partially become obvious from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a cross-sectional view of a pipe device according to a first embodiment of the present application;

[0029] Figure 2 is a cross-sectional view of a pipe device according to a second embodiment of the present application;

[0030] Figure 3 is a cross-sectional view of a pipe device according to a third embodiment of the present application;

[0031] Figure 4 is a cross-sectional view of a pipe device according to a fourth embodiment of the present application;

[0032] Figure 5 is a cross-sectional view of a pipe device according to a fifth embodiment of the present application;

[0033] Figure 6 is a cross-sectional view of a pipe arrangement according to a sixth embodiment of the application;

[0034] Figure 7 is a cross-sectional view of a pipe arrangement according to a seventh embodiment of the application;

[0035] Figure 8 is a cross-sectional view of a first pipe assembly according to an embodiment of the application;

[0036] Figure 9 is a cross-sectional view of a first pipe assembly according to another embodiment of the application;

[0037] Figure 10 is a cross-sectional view of a first connector sleeve according to an embodiment of the application;

[0038] Figure 11 is a cross-sectional view of a first connector sleeve according to another embodiment of the application;

[0039] Figure 12 is a cross-sectional view of a first connector sleeve according to yet another embodiment of the application;

[0040] Figure 13 is a front view of a first protrusion according to an embodiment of the application;

[0041] Figure 14 is a front view of a first protrusion according to another embodiment of the application;

[0042] Figure 15 is a cross-sectional view of a second pipe assembly according to a first embodiment of the application;

[0043] Figure 16 is a cross-sectional view of a second pipe assembly according to a second embodiment of the application;

[0044] Figure 17 is a cross-sectional view of a second pipe assembly according to a third embodiment of the application;

[0045] Figure 18 is a cross-sectional view of a second pipe assembly according to a fourth embodiment of the application;

[0046] Figure 19 is a cross-sectional view of a second pipe assembly according to a fifth embodiment of the application;

[0047] Figure 20 is a cross-sectional view of a second pipe assembly according to a sixth embodiment of the application.

[0048] Reference numerals:

[0049] The first pipe assembly 10, the first pipe 1, the first pipe body 11, the first pipe diameter changing part 12, the first transition section 13, the first connecting sleeve 2, the first convex part 21, the matching part 22, the connecting part 23, the second pipe assembly 20, the second pipe 3, the second transition section 31, the second pipe body 32, the second pipe diameter changing part 33, the third transition section 34, the second connecting sleeve 4, the welding matching surface 41, the anti-dripping extension surface 42, the second convex part 43. DETAILED DESCRIPTION

[0050] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0051] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0052] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, unless otherwise explicitly and specifically limited.

[0053] The following will be described in detail Figures 1-20 The pipe device according to the embodiments of the present application is described in detail below.

[0054] Referring to Figures 1-7 shown, the pipe device according to the embodiments of the present application can include a first pipe assembly 10 and a second pipe assembly 20.

[0055] As shown in Figures 1-9 shown, the first pipe assembly 10 can include a first pipe 1 and a first connecting sleeve 2, and the first connecting sleeve 2 is connected to the first pipe 1. Optionally, the first connecting sleeve 2 and the first pipe 1 can be fixedly connected by welding. The first connecting sleeve 2 is arranged at the end of the first pipe 1, as in the embodiment shown in Figures 1-9 shown, the first connecting sleeve 2 is located at the lower end of the first pipe 1.

[0056] In some embodiments, the material of the first pipe 1 comprises a first metal. In some embodiments, the first metal is iron. The present application is described by taking iron as the first metal, so that the main material of the first pipe 1 comprises iron, and can also comprise other materials, such as carbon, so that the first pipe 1 is a steel pipe, and optionally, the first pipe 1 is a stainless steel pipe. Of course, in some embodiments, the first pipe 1 can also be a pure iron pipe.

[0057] Similarly, the material of the first connecting sleeve 2 comprises a second metal. In some embodiments, the second metal is copper. The present application is described by taking copper as the second metal, so that the main material of the first connecting sleeve 2 comprises copper, and can also comprise other materials, and of course, the first connecting sleeve 2 can also be a pure copper sleeve. For the convenience of description, the first connecting sleeve 2 is collectively referred to as a copper sleeve.

[0058] In some alternative embodiments, the second metal can also be aluminum, which is not described here.

[0059] Referring to Figures 1-7 , Figures 15-20 As shown in FIG. 2, the second pipe assembly 20 can comprise a second pipe 3 and a second connecting sleeve 4 connected with the second pipe 3. Optionally, the second connecting sleeve 4 and the second pipe 3 can be fixedly connected by welding. In other alternative embodiments, the second connecting sleeve 4 and the second pipe 3 can also be integrally formed.

[0060] The second connecting sleeve 4 is located at the end of the second pipe 3, for example, in the embodiment shown in Figures 1-7 , Figures 15-20 As shown in FIG. 2, the second connecting sleeve 4 is located at the upper end of the second pipe 3, i.e., the second connecting sleeve 4 is located at the end of the second pipe 3 close to the first connecting sleeve 2, so as to facilitate the connection of the second connecting sleeve 4 and the first connecting sleeve 2.

[0061] The material of the second connecting sleeve 4 comprises a second metal. When the second metal is copper, similarly, the main material of the second connecting sleeve 4 comprises copper, and can also comprise other materials, and of course, the second connecting sleeve 4 can also be pure copper. For the convenience of description, the second connecting sleeve 4 is collectively referred to as a copper sleeve.

[0062] The thermal conductivity of the second metal is higher than that of the first metal, thus the thermal conductivity of the second metal is higher than that of the first metal. Taking iron as the first metal and copper as the second metal as an example, according to material properties, copper has a higher thermal conductivity than steel. Copper has good thermal conductivity, while steel has poor thermal conductivity. After heating, copper material turns red-hot (i.e., high temperature) in the vicinity of the heating point, while steel material only turns red-hot at the heating point, while the surrounding area remains its original color. In other words, the heat at the heating point of copper material easily diffuses to the surrounding area, making the surrounding area high-temperature, while the heat at the heating point of steel material is difficult to diffuse to the surrounding area, maintaining a high temperature only at the heating point.

[0063] Reference Figures 1-7 , Figures 15-20 As shown, the inner wall surface of the second connecting sleeve 4 includes: a drip-proof extension surface 42 and a welding mating surface 41. The first connecting sleeve 2 extends at least partially into the second connecting sleeve 4, and the first connecting sleeve 2 is fixed to the welding mating surface 41.

[0064] Specifically, the first connecting sleeve 2 is welded and fixed to the welding mating surface 41, and the anti-drip extension surface 42 is provided at one end of the welding mating surface 41, which is away from the first connecting sleeve 2. Figures 1-7 , Figures 15-20 In the embodiment shown, the anti-drip extension surface 42 is located at the lower end of the welding mating surface 41. Since the second connecting sleeve 4 is a copper sleeve, the main materials of both the welding mating surface 41 and the anti-drip extension surface 42 include copper (i.e., the second metal). Thus, when the welding torch welds at the welding mating surface 41, the area near the heating point of the second connecting sleeve 4 is red-hot. In other words, the welding heat generated when the welding mating surface 41 of the first connecting sleeve 2 and the second connecting sleeve 4 is welded will not only make the welding mating surface 41 red-hot, but also make the anti-drip extension surface 42 red-hot. Excess solder at the welding mating surface 41 will slide down onto the anti-drip extension surface 42. The high-temperature anti-drip extension surface 42 can effectively absorb the dripping solder, preventing the solder from dripping further onto the four-way valve and other components below, thereby further preventing the internal sliding parts of the four-way valve and other components from jamming or producing abnormal noise.

[0065] The pipeline device of the present invention has a second connecting sleeve 4 including two working areas: an anti-drip extension surface 42 and a welding mating surface 41. Compared with the technical solution where the second connecting sleeve only has a welding mating surface, by setting the anti-drip extension surface 42, it can be ensured that the anti-drip extension surface 42 can effectively absorb the solder, thereby preventing the solder from slipping onto the second pipeline 3.

[0066] Optionally, the first connecting sleeve 2 and the welding mating surface 41 can be fixed by flame brazing.

[0067] According to the pipe device, the welding matching surface 41 of the second connecting sleeve 4 is welded and fixed with the first connecting sleeve 2, and the anti-dripping extension surface 42 is arranged at the lower end of the welding matching surface 41, so that the anti-dripping extension surface 42 is away from the first connecting sleeve 2, the excess welding material at the welding matching surface 41 can drip to the anti-dripping extension surface 42, the anti-dripping extension surface 42 mainly made of the second metal can absorb the dripping welding material, and the welding material is prevented from further dripping to the lower component, so that the internal sliding component of the lower component is further prevented from being stuck or generating an abnormal sound.

[0068] In some embodiments of the present application, the inner diameters of the anti-dripping extension surface 42 and the welding matching surface 41 are equal. In this way, the resistance of the welding material flowing between the welding matching surface 41 and the anti-dripping extension surface 42 can be reduced, and the excess welding material can flow to the anti-dripping extension surface 42 along the joint between the welding matching surface 41 and the anti-dripping extension surface 42.

[0069] If the inner diameters of the anti-dripping extension surface 42 and the welding matching surface 41 are not equal, the anti-dripping extension surface 42 and the welding matching surface 41 must be connected through a transition section, and the transition section is generally formed by machining or other forming methods, so that the stress of the transition section is relatively concentrated. After being heated (such as being directly heated or being subjected to heat radiation), the transition section is prone to cracking. Therefore, the inner diameters of the anti-dripping extension surface 42 and the welding matching surface 41 are designed to be equal, so that the anti-dripping extension surface 42 and the welding matching surface 41 are located on the same circular surface, the stress concentration phenomenon of the joint between the anti-dripping extension surface 42 and the welding matching surface 41 is reduced, and the strength and rigidity of the second connecting sleeve 4 are better.

[0070] It should be noted that, in the present application, the expressions such as “equal inner diameters” and “same inner diameters” include the case of complete equality or approximate equality, which is obviously different from the case of abrupt change of the inner diameter. That is, the case of complete equality of the inner diameter or the case of approximate equality of the inner diameter are both within the protection scope of the present application.

[0071] In some embodiments of the present application, the fitting diameter of the first pipe 1 is d1, the fitting diameter of the first connecting sleeve 2 is d2, and d1=d2. When the first connecting sleeve 2 is arranged outside the first pipe 1, as shown in FIG. 2, d1 is the outer diameter of the fitting part of the first pipe 1, and d2 is the inner diameter of the fitting part of the first connecting sleeve 2. When the first connecting sleeve 2 is arranged inside the first pipe 1, as shown in FIG. 3, d1 is the inner diameter of the fitting part of the first pipe 1, and d2 is the outer diameter of the fitting part of the first connecting sleeve 2. Figure 8 Figure 9 When the first connecting sleeve 2 is arranged outside the first pipe 1, as shown in FIG. 2, d1 is the outer diameter of the fitting part of the first pipe 1, and d2 is the inner diameter of the fitting part of the first connecting sleeve 2. When the first connecting sleeve 2 is arranged inside the first pipe 1, as shown in FIG. 3, d1 is the inner diameter of the fitting part of the first pipe 1, and d2 is the outer diameter of the fitting part of the first connecting sleeve 2.

[0072] In combination with FIGS. 2 and 3, Figures 8-14 ​As shown, the first connecting sleeve 2 can include a fitting part 22 and a connecting part 23, the fitting part 22 is used to be nested with the first pipeline 1, and the connecting part 23 is used to be connected with the second connecting sleeve 4. In this way, the fitting part 22 is located at the upper end, which is convenient for connecting with the first pipeline 1, and the fitting part 22 and the first pipeline 1 can be welded and fixed by adopting tunnel furnace brazing, optionally, the connecting part 23 is located at the lower end, which is convenient for connecting with the second connecting sleeve 4, and the connecting part 23 and the second connecting sleeve 4 are welded.

[0073] In some embodiments, the pipe diameters of the fitting part 22 and the connecting part 23 are the same, and the fitting part 22 and the connecting part 23 are combined Figures 1-10 As shown, the first connecting sleeve 2 is a straight cylinder sleeve, the outer diameter d2 of the fitting part 22 and the outer diameter d3 of the connecting part 23 are equal, that is, d2=d3, and the inner diameter of the fitting part 22 and the inner diameter of the connecting part 23 are also equal, which can simplify the machining process of the second connecting sleeve 4. In other embodiments, the pipe diameters of the fitting part 22 and the connecting part 23 are different, such as in the embodiment shown in Figure 11 、 Figures 13-14 As shown in the embodiment, the outer diameter d2 of the fitting part 22 is smaller than the outer diameter d3 of the connecting part 23, that is, d2<d3, and the inner diameter of the fitting part 22 is smaller than the inner diameter of the connecting part 23; for example, in the embodiment shown in Figure 12 As shown, the outer diameter d2 of the fitting part 22 is greater than the outer diameter d3 of the connecting part 23, that is, d2>d3, and the inner diameter of the fitting part 22 is greater than the inner diameter of the connecting part 23, thereby realizing the change of diameter to meet the needs of users for the change of diameter.

[0074] It should be noted that in the present application, the pipe diameter has an inner diameter and an outer diameter, and "different pipe diameters" can include only the outer diameter being different and the inner diameter being equal, or only the inner diameter being different and the outer diameter being equal, or both the outer diameter and the inner diameter being different. "The same pipe diameter" includes that both the outer diameter and the inner diameter are equal. Similarly, the "equal" and "same" sizes mentioned herein include the case of complete equality or approximate equality, and "different" refers to the case of diameter mutation.

[0075] Referring to Figures 8-14 As shown, the length of the fitting part 22 is L4, the fitting length of the first connecting sleeve 2 and the first pipeline 1 is L3, and L3≤L4.

[0076] The length of the first connecting sleeve 2 extending out of the end of the first pipeline 1 is L1, in other words, L1 is the length of the first connecting sleeve 2 extending downwardly out of the lower end of the first pipeline 1, in some embodiments, in combination with Figures 1-6 、 Figures 8-9 As shown, L1>0, for example, L1 can be 20mm, 22mm, 25mm, 30mm, etc.; in some embodiments, referring to Figure 7 As shown, L1=0.

[0077] In some embodiments of the present application, referring to Figures 1-7As shown, the first pipeline 1 can include: a first pipe diameter changing part 12 and a first pipeline body 11, the first pipe diameter changing part 12 is arranged at the end of the first pipeline body 11, specifically, the first pipe diameter changing part 12 is arranged at the lower end of the first pipeline body 11, facilitating the connection of the first pipe diameter changing part 12 and the first connecting sleeve 2. The pipe diameter of the first pipeline body 11 is different from the pipe diameter of the first pipe diameter changing part 12.

[0078] The first pipe diameter changing part 12 and the first connecting sleeve 2 are nested and matched, that is, in the axial direction of the pipeline device, the first pipe diameter changing part 12 and the first connecting sleeve 2 at least partially overlap, and the first pipe diameter changing part 12 and the first connecting sleeve 2 are welded and fixed, so as to realize the welded and fixed connection of the first pipeline 1 and the first connecting sleeve 2. Alternatively, the first pipe diameter changing part 12 and the first connecting sleeve 2 can be welded and fixed by tunnel furnace brazing.

[0079] The matching length of the first pipe diameter changing part 12 and the first connecting sleeve 2 is L3, and the length of the weld between the first pipe diameter changing part 12 and the first connecting sleeve 2 can also be L3, so as to improve the connection firmness of the first pipe diameter changing part 12 and the first connecting sleeve 2. Alternatively, the length of the first pipe diameter changing part 12 is ≥15mm, and L3 is ≥8mm. Alternatively, the length of the first pipe diameter changing part 12 is 18mm, 20mm, 25mm, 28mm, 30mm, etc., and L3 is 10mm, 12mm, 15mm, 18mm, 22mm, etc.

[0080] In some embodiments of the present application, referring to Figures 1-6 As shown, in the axial direction of the pipeline device, the welding position of the first connecting sleeve 2 and the first pipe diameter changing part 12 is adapted to be staggered with the welding matching face 41. That is, in the axial direction of the pipeline device, the welding position of the first connecting sleeve 2 and the first pipe diameter changing part 12 does not overlap with the welding matching face 41, and the lower end of the first pipe diameter changing part 12 and the upper end of the second connecting sleeve 4 have a spacing distance, which is L1-L7, so that the first pipeline body 11 is also staggered with the welding matching face 41.

[0081] In some embodiments of the present application, referring to Figures 1-6 As shown, the minimum axial distance between the welding position of the first connecting sleeve 2 and the first pipe diameter changing part 12 and the welding matching face 41 is greater than or equal to 10mm. In other words, the distance between the lower end of the first pipe diameter changing part 12 and the upper end of the second connecting sleeve 4 is greater than or equal to 10mm, that is, L1-L7≥10mm, and optionally, L1-L7 can be 12mm, 13mm, 14mm, 16mm, 19mm, 23mm, etc.

[0082] In some embodiments of the present application, referring to Figures 1-7As shown, the first pipe diameter changing part 12 and the first pipe body 11 can be connected through the first transition section 13, that is, the first transition section 13 is the variable diameter place of the first pipe diameter changing part 12 and the first pipe body 11. In the axial direction of the pipe device, the first transition section 13 is staggered with the welding cooperation face 41.

[0083] In specific embodiments, the first transition section 13 is generally formed by machining or other forming methods, and compared with the first pipe diameter changing part 12 and the first pipe body 11, the stress at the first transition section 13 is more concentrated, and after being heated, the first transition section 13 is prone to cracking, therefore, the first transition section 13 is staggered with the welding cooperation face 41, so that the welding heat at the welding cooperation face 41 has less influence on the first transition section 13, which can effectively prevent the first transition section 13 from cracking due to heat.

[0084] Optionally, the minimum axial distance between the first transition section 13 and the welding cooperation face 41 is greater than or equal to 18 mm, in other words, the minimum axial distance between the lower end of the first transition section 13 and the upper end of the second connecting sleeve 4 is not less than 18 mm, for example, the minimum axial distance can be 20 mm, 25 mm, 27 mm, 31 mm, 33 mm, 42 mm, etc.

[0085] In some embodiments of the present application, referring to Figure 7 As shown, the end face of the first pipe diameter changing part 12 is flush with the end face of the first connecting sleeve 2, that is, L1=0. In some embodiments of the present application, referring to Figures 1-6 、 Figures 8-9 As shown, the first pipe diameter changing part 12 and the first connecting sleeve 2 are partially nested, that is, L1>0. The first pipe diameter changing part 12 partially extends into the first connecting sleeve 2, when the first connecting sleeve 2 is sleeved outside the first pipe diameter changing part 12, referring to Figures 1-6 、 Figure 8 As shown; when the first connecting sleeve 2 is sleeved inside the first pipe diameter changing part 12, referring to Figure 9 As shown.

[0086] In some embodiments of the present application, referring to Figures 1-7 As shown, a part of the first connecting sleeve 2 extends into the second connecting sleeve 4, so that the welding cooperation face 41 overlaps a part of the lower end of the first connecting sleeve 2, and the first pipe 1 is fixedly connected with the first connecting sleeve 2 from above the first connecting sleeve 2, when the first pipe 1 includes the first transition section 13, the first transition section 13 can be made farther away from the welding cooperation face 41, the welding heat at the welding cooperation face 41 has less thermal radiation on the first transition section 13, and the welding heat at the welding cooperation face 41 also greatly reduces the heat transferred to the first transition section 13 through heat transfer, so that the first transition section 13 can be prevented from cracking.

[0087] In some embodiments of the present invention, the material of the second pipe 3 includes a second metal. Taking copper as an example, the main material of the second pipe 3 includes copper, and it may also include other materials. Of course, the second pipe 3 may also be pure copper. For ease of description, the second pipe 3 is referred to as a copper pipe.

[0088] Reference Figures 1-3 , Figures 15-18 As shown, the second connecting sleeve 4 is located at the end of the second pipe 3 near the first pipe assembly 10, that is, the second connecting sleeve 4 is located at the upper end of the second pipe 3, and the second connecting sleeve 4 and the second pipe 3 are integrally formed. The materials of the second connecting sleeve 4 and the second pipe 3 both include a second metal, which facilitates the integral forming of the second connecting sleeve 4 and the second pipe 3.

[0089] In some embodiments, refer to Figures 1-3 , Figures 15-17 As shown, the second connecting sleeve 4 and the second pipe 3 have different diameters. Specifically, in Figures 1-3 , Figures 15-16 In the illustrated embodiment, the outer diameter of the second connecting sleeve 4 is larger than the outer diameter of the second pipe 3, and the inner diameter of the second connecting sleeve 4 is larger than the inner diameter of the second pipe 3. Figure 17 In one embodiment, the outer diameter of the second connecting sleeve 4 is smaller than the outer diameter of the second pipe 3, and the inner diameter of the second connecting sleeve 4 is smaller than the inner diameter of the second pipe 3.

[0090] In some embodiments, refer to Figures 1-3 , Figures 15-17 As shown, the second pipeline 3 and the second connecting sleeve 4 are connected by the second transition section 31. The end of the anti-drip extension surface 42 that is away from the welding mating surface 41 extends to the second transition section 31, that is, the lower end of the anti-drip extension surface 42 extends to the second transition section 31. In this way, the welding mating surface 41 is away from the second transition section 31. In other words, in the axial direction of the pipeline device, the welding mating surface 41 and the second transition section 31 are offset.

[0091] Specifically, when the diameters of the second pipe 3 and the second connecting sleeve 4 are different, the second transition section 31 is generally formed by machining or other forming methods. Compared to the second pipe 3 and the second connecting sleeve 4, the stress at the second transition section 31 is more concentrated, making it prone to cracking after heating. Therefore, by offsetting the second transition section 31 from the welding mating surface 41, the welding heat at the welding mating surface 41 has a smaller impact on the second transition section 31, effectively preventing cracking due to heat. Furthermore, the second transition section 31 is located below the anti-drip extension surface 42, which also helps to prevent solder from continuing to drip downwards from the anti-drip extension surface 42. In other words, compared to the technical solution where the welding mating surface 41 is adjacent to the second transition section 31, setting the anti-drip extension surface 42 can reduce the cracking of the second transition section 31.

[0092] In some embodiments, referring to Figure 18 As shown, the second connecting sleeve 4 and the second pipeline 3 are integrally formed, and the pipe diameter of the second connecting sleeve 4 and the second pipeline 3 is the same, so that the forming process of the second connecting sleeve 4 and the second pipeline 3 can be simplified.

[0093] In some embodiments of the present application, referring to Figures 4-7 , Figures 19-20 As shown, the material of the second pipeline 3 includes a first metal. When the first metal is iron, the main material of the second pipeline 3 includes iron, and can also include other materials, such as carbon, so that the second pipeline 3 is a steel pipe, and optionally, the second pipeline 3 is a stainless steel pipe. Of course, the second pipeline 3 can also be a pure iron pipe. Referring to Figures 4-7 , Figures 19-20 As shown, the second pipeline 3 is nested with the second connecting sleeve 4, and the second pipeline 3 and the second connecting sleeve 4 can be fixedly connected by welding.

[0094] Specifically, referring to Figures 4-7 , Figures 19-20 As shown, the second pipeline 3 can include a second pipeline body 32 and a second pipe diameter changing part 33, and the second pipe diameter changing part 33 is arranged at one end of the second pipeline body 32 close to the first pipeline assembly 10, i.e. the second pipe diameter changing part 33 is arranged at the upper end of the second pipeline body 32.

[0095] Further, the pipe diameter of the second pipe diameter changing part 33 is different from that of the second pipeline body 32, and the second pipeline body 32 and the second pipe diameter changing part 33 are connected through a third transition section 34, the second connecting sleeve 4 is nested with the second pipe diameter changing part 33, and the second connecting sleeve 4 and the second pipe diameter changing part 33 are fixedly connected by welding, and optionally, the second connecting sleeve 4 and the second pipe diameter changing part 33 can be fixedly connected by tunnel furnace brazing.

[0096] The drip-proof extension surface 42 extends downward to the third transition section 34, so that the welding matching surface 41 is far away from the third transition section 34, in other words, in the axial direction of the pipeline device, the welding matching surface 41 is staggered with the third transition section 34.

[0097] In specific embodiments, the third transition section 34 is generally formed by machining or other forming methods, and stress is more concentrated at the third transition section 34 than at the second pipe body 32 and the second pipe diameter changing section 33. After being heated, the third transition section 34 is prone to cracking. Therefore, the third transition section 34 is staggered with the welding joint surface 41, so that the welding heat at the welding joint surface 41 has less effect on the third transition section 34, and the cracking of the third transition section 34 can be effectively prevented. In other words, compared with the technical solution in which the welding joint surface 41 is immediately adjacent to the third transition section 34, the anti-dripping extension surface 42 can reduce the cracking of the third transition section 34.

[0098] In some embodiments, as shown in Figures 4-7 , Figure 20 , the pipe diameter of the second pipe diameter changing section 33 is greater than the pipe diameter of the second pipe body 32, the second pipe diameter changing section 33 is sleeved outside the second connecting sleeve 4, and the third transition section 34 can block the downward sliding of the welding material when the second pipe diameter changing section 33 is welded with the second connecting sleeve 4. In other embodiments, as shown in Figure 19 , , the pipe diameter of the second pipe diameter changing section 33 is less than the pipe diameter of the second pipe body 32, the second pipe diameter changing section 33 is sleeved inside the second connecting sleeve 4, and the third transition section 34 can block the downward sliding of the welding material when the second pipe diameter changing section 33 is welded with the second connecting sleeve 4.

[0099] In some embodiments of the present application, the length L6 of the anti-dripping extension surface 42 is not less than the length L7 of the welding joint surface 41, i.e. L6≥L7. In this way, the anti-dripping extension surface 42 is longer, and the excess welding material at the welding joint surface 41 can be as much as possible adhered to the anti-dripping extension surface 42, so as to prevent the excess welding material from sliding off the anti-dripping extension surface 42.

[0100] In some embodiments of the present application, the length L6 of the anti-dripping extension surface 42 is greater than or equal to 10 mm, i.e. L6≥10 mm. Optionally, the length L6 of the anti-dripping extension surface 42 can be 12 cm, 15 cm, 18 mm, 20 mm, 24 mm, etc. The total length (i.e. L6+L7) of the anti-dripping extension surface 42 and the welding joint surface 41 can be 25 mm, 30 mm, 30 mm, 32 mm, 35 mm, etc.

[0101] Figures 1-2 , Figures 4-5 , Figure 7As shown, the first connecting sleeve 2 is further provided with a first protrusion 21, which is positioned at the free end face of the second connecting sleeve 4. Specifically, when connecting and fixing the first pipeline assembly 10 and the second pipeline assembly 20, the first connecting sleeve 2 is first inserted and fitted with the second connecting sleeve 4, so that the upper end of the second connecting sleeve 4 abuts against the first protrusion 21 of the first connecting sleeve 2, thereby making the relative position of the first connecting sleeve 2 and the second connecting sleeve 4 accurate, and then the welding operation is performed on the connecting position of the first connecting sleeve 2 and the second connecting sleeve 4, and the positioning effect of the first protrusion 21 makes the welding position accurate.

[0102] Referring to Figures 10-14 As shown, the first protrusion 21 divides the first connecting sleeve 2 into a fitting portion 22 and a connecting portion 23, the fitting portion 22 is located above the first protrusion 21, and the connecting portion 23 is located below the first protrusion 21, and the length of the connecting portion 23 is L2.

[0103] Referring to Figures 8-14 As shown, when the first connecting sleeve 2 is nested inside the second connecting sleeve 4, the first protrusion 21 can be arranged on the outer wall surface of the first connecting sleeve 2, so that the first protrusion 21 positions the second connecting sleeve 4 from the outside of the first connecting sleeve 2.

[0104] In some embodiments not shown in the drawings, when the second connecting sleeve 4 is nested inside the first connecting sleeve 2, the first protrusion 21 can also be arranged on the inner wall surface of the first connecting sleeve 2, so that the first protrusion 21 positions the second connecting sleeve 4 from the inside of the first connecting sleeve 2.

[0105] Optionally, in some embodiments, referring to Figure 13 As shown, the first protrusion 21 is configured as a plurality of first protrusions, which are arranged at intervals in the circumferential direction of the first connecting sleeve 2. Optionally, the plurality of first protrusions are uniformly arranged in the circumferential direction of the first connecting sleeve 2, so that the positioning points are uniformly distributed when positioning the end portion of the second connecting sleeve 4, and the positioning effect is better.

[0106] In some embodiments, referring to Figure 14 As shown, the first protrusion 21 is configured as a first annular protrusion arranged in a whole circle, which is continuously protruded in the circumferential direction of the first connecting sleeve 2, so that the end portion of the second connecting sleeve 4 can be positioned in the whole circle direction, and the positioning effect is better.

[0107] In some embodiments of the present application, referring to Figure 1 , Figure 3 , Figures 5-6 , Figure 16As shown, the second connecting sleeve 4 is further provided with a second protrusion 43, which is positioned at the free end face of the first connecting sleeve 2. Specifically, when connecting and fixing the first pipe assembly 10 and the second pipe assembly 20, the first connecting sleeve 2 is first inserted into the second connecting sleeve 4, so that the lower end of the first connecting sleeve 2 abuts against the second protrusion 43, thereby ensuring the accurate relative position of the first connecting sleeve 2 and the second connecting sleeve 4, and then the welding operation is performed on the connecting position of the first connecting sleeve 2 and the second connecting sleeve 4, and the positioning effect of the second protrusion 43 ensures the accurate welding position.

[0108] Referring to Figure 1 , Figure 3 , Figures 5-6 , Figure 16 As shown, when the first connecting sleeve 2 is nested inside the second connecting sleeve 4, the second protrusion 43 can be arranged on the inner wall surface of the second connecting sleeve 4, so that the second protrusion 43 positions the first connecting sleeve 2 from the inside of the second connecting sleeve 4.

[0109] In some embodiments not shown in the figures, when the second connecting sleeve 4 is nested inside the first connecting sleeve 2, the second protrusion 43 can also be arranged on the outer wall surface of the second connecting sleeve 4, so that the second protrusion 43 positions the first connecting sleeve 2 from the outside of the second connecting sleeve 4.

[0110] Further, referring to Figure 1 , Figure 3 , Figures 5-6 , Figure 16 As shown, in the axial direction of the pipe device, the second protrusion 43 is adapted to separate the drip-proof extension surface 42 and the welding cooperation surface 41. In other words, the welding cooperation surface 41 is located on the side of the second protrusion 43 close to the first pipe assembly 10, and the drip-proof extension surface 42 is located on the side of the second protrusion 43 away from the first pipe assembly 10. That is, the welding cooperation surface 41 is located on the upper side of the second protrusion 43, and the drip-proof extension surface 42 is located on the lower side of the second protrusion 43.

[0111] Optionally, in some embodiments, the second protrusion 43 is configured as a plurality of second protrusions, which are arranged at intervals in the circumferential direction of the second connecting sleeve 4. Optionally, the plurality of second protrusions are uniformly arranged along the circumferential direction of the second connecting sleeve 4, so that the positioning points are uniformly distributed when positioning the end of the first connecting sleeve 2, and the positioning effect is better. In addition, the second protrusion 43 can also block the excess welding material at the welding cooperation surface 41, so that more welding material is solidified at the welding cooperation surface 41, thereby avoiding waste of excessive welding material.

[0112] In some other embodiments, the second protrusion 43 is configured as a second annular protrusion arranged in a whole circle, which is continuously protruded in the circumferential direction of the second connecting sleeve 4, so that the end of the first connecting sleeve 2 can be positioned in the whole circle direction, and the positioning effect is better. Moreover, the second annular protrusion is arranged in a whole circle, which can also block the excess solder at the welding matching surface 41, so that the solder is more solidified at the welding matching surface 41, and the waste of the solder is avoided.

[0113] Reference will now be made to the drawings Figure 2 A pipe device is described in one specific embodiment of the application.

[0114] The pipe device comprises a first pipe assembly 10 and a second pipe assembly 20.

[0115] The first pipe assembly 10 comprises a first pipe 1 and a first connecting sleeve 2, the first pipe 1 is a stainless steel pipe, and the first connecting sleeve 2 is a copper sleeve, and the first connecting sleeve 2 is located at the lower end of the first pipe 1. The first pipe 1 comprises a first pipe body 11 and a first pipe diameter changing part 12, the first pipe diameter changing part 12 is located at the lower end of the first pipe body 11, the pipe diameter of the first pipe diameter changing part 12 is smaller than that of the first pipe body 11, and the first pipe diameter changing part 12 and the first pipe body 11 are connected through a first transition section 13. The length of the first pipe diameter changing part 12 is 16 mm, the first pipe diameter changing part 12 is partially embedded in the first connecting sleeve 2, the first pipe diameter changing part 12 and the first connecting sleeve 2 are welded and fixed by tunnel furnace brazing, the welding length L3 is 10 mm, and the length L1 of the first connecting sleeve 2 extending out of the end of the first pipe diameter changing part 12 is 22 mm. The outer circumferential surface of the first connecting sleeve 2 is provided with a first protrusion 21, and the first protrusion 21 is configured as a first annular protrusion.

[0116] The second pipeline assembly 20 comprises a second pipeline 3 and a second connecting sleeve 4, the second pipeline 3 is a copper pipe, the second connecting sleeve 4 is a copper sleeve, the second connecting sleeve 4 is integrally formed with the second pipeline 3, and the second connecting sleeve 4 is located at the upper end of the second pipeline 3, the pipe diameter of the second connecting sleeve 4 is larger than that of the second pipeline 3, and the second connecting sleeve 4 is connected with the second pipeline 3 through the second transition section 31. The inner wall surface of the second connecting sleeve 4 comprises an anti-dripping extension surface 42 and a welding cooperation surface 41, the inner diameters of the anti-dripping extension surface 42 and the welding cooperation surface 41 are equal, the first connecting sleeve 2 partially extends into the second connecting sleeve 4, the upper end of the second connecting sleeve 4 abuts against the first protruding part 21 of the first connecting sleeve 2, the first connecting sleeve 2 is welded and fixed with the welding cooperation surface 41, and the welding length L7 is 10 mm. The anti-dripping extension surface 42 is located below the welding cooperation surface 41, the lower end of the anti-dripping extension surface 42 extends to the second transition section 31, the excess solder at the welding cooperation surface 41 can drip onto the anti-dripping extension surface 42, the anti-dripping extension surface 42 can adsorb the dripping solder, and further prevent the internal sliding parts of the lower parts from being stuck or generating abnormal sound.

[0117] The minimum axial distance between the first transition section 13 and the welding cooperation surface 41 is 28 mm, and the length L6 of the anti-dripping extension surface 42 is 15 cm.

[0118] The following refers to Figure 6 A pipeline device is described in another specific embodiment of the application.

[0119] The pipeline device comprises a first pipeline assembly 10 and a second pipeline assembly 20.

[0120] The first pipeline assembly 10 comprises a first pipeline 1 and a first connecting sleeve 2, the first pipeline 1 is a stainless steel pipe, the first connecting sleeve 2 is a copper sleeve, and the first connecting sleeve 2 is located at the lower end of the first pipeline 1. The first pipeline 1 comprises a first pipeline body 11 and a first pipe diameter changing part 12, the first pipe diameter changing part 12 is located at the lower end of the first pipeline body 11, the pipe diameter of the first pipe diameter changing part 12 is smaller than that of the first pipeline body 11, and the first pipe diameter changing part 12 is connected with the first pipeline body 11 through the first transition section 13. The length of the first pipe diameter changing part 12 is 16 mm, the first pipe diameter changing part 12 is partially embedded in the first connecting sleeve 2, the first pipe diameter changing part 12 is welded and fixed with the first connecting sleeve 2 by tunnel furnace brazing, the welding length L3 is 10 mm, and the length L1 of the first connecting sleeve 2 extending out of the end of the first pipe diameter changing part 12 is 22 mm.

[0121] The second pipeline assembly 20 comprises a second pipeline 3 and a second connecting sleeve 4, the second pipeline 3 is a stainless steel pipe, the second connecting sleeve 4 is a copper sleeve, the second connecting sleeve 4 is located at the upper end of the second pipeline 3, the second pipeline 3 comprises a second pipeline body 32 and a second pipeline diameter changing part 33, the second pipeline diameter changing part 33 is arranged at the upper end of the second pipeline body 32, the pipe diameter of the second pipeline diameter changing part 33 is greater than that of the second pipeline body 32, the second pipeline body 32 and the second pipeline diameter changing part 33 are connected through a third transition section 34, the lower end of the second connecting sleeve 4 is nested in the second pipeline diameter changing part 33, and the second connecting sleeve 4 and the second pipeline diameter changing part 33 are welded and fixed by tunnel furnace brazing. The inner wall surface of the second connecting sleeve 4 comprises an anti-dripping extension surface 42 and a welding matching surface 41, the inner diameters of the anti-dripping extension surface 42 and the welding matching surface 41 are equal, and a second convex part 43 is further arranged on the inner circumferential surface of the second connecting sleeve 4, the second convex part 43 is configured as a second annular protrusion. The welding matching surface 41 is located above the second convex part 43, and the anti-dripping extension surface 42 is located below the second convex part 43. The first connecting sleeve 2 partially extends into the second connecting sleeve 4, the lower end of the first connecting sleeve 2 abuts against the second convex part 43 of the second connecting sleeve 4, the first connecting sleeve 2 is welded and fixed with the welding matching surface 41, and the welding length L7 is 10 mm. The anti-dripping extension surface 42 is located below the welding matching surface 41, the anti-dripping extension surface 42 extends downward to the third transition section 34, the excess solder at the welding matching surface 41 can drip onto the anti-dripping extension surface 42, the anti-dripping extension surface 42 can adsorb the dripping solder, preventing the solder from further dripping onto the lower components, thereby further preventing the internal sliding components of the lower components from being stuck or producing abnormal sound.

[0122] The minimum axial distance between the first transition section 13 and the welding matching surface 41 is 28 mm, and the length L6 of the anti-dripping extension surface 42 is 15 cm.

[0123] The following refers to Figure 7 A pipeline device is described in another specific embodiment of the application.

[0124] The pipeline device comprises a first pipeline assembly 10 and a second pipeline assembly 20.

[0125] The first pipe assembly 10 comprises a first pipe 1 and a first connecting sleeve 2, the first pipe 1 is a stainless steel pipe, the first connecting sleeve 2 is a copper sleeve, and the first connecting sleeve 2 is located at the lower end of the first pipe 1. The first pipe 1 comprises a first pipe body 11 and a first pipe diameter changing part 12, the first pipe diameter changing part 12 is located at the lower end of the first pipe body 11, the pipe diameter of the first pipe diameter changing part 12 is smaller than that of the first pipe body 11, and the first pipe diameter changing part 12 and the first pipe body 11 are connected through a first transition section 13. The length of the first pipe diameter changing part 12 is 38 mm, the first pipe diameter changing part 12 is partially embedded in the first connecting sleeve 2, the first pipe diameter changing part 12 and the first connecting sleeve 2 are welded and fixed by tunnel furnace brazing, the welding length L3 is 32 mm, and the length L1 of the first connecting sleeve 2 extending out of the end of the first pipe diameter changing part 12 is 0 mm, that is, the end surface of the first pipe diameter changing part 12 is flush with the end surface of the first connecting sleeve 2. The outer peripheral surface of the first connecting sleeve 2 is provided with a first protrusion 21, and the first protrusion 21 is configured as a first annular protrusion.

[0126] The second pipe assembly 20 comprises a second pipe 3 and a second connecting sleeve 4, the second pipe 3 is a stainless steel pipe, the second connecting sleeve 4 is a copper sleeve, the second connecting sleeve 4 is located at the upper end of the second pipe 3, the second pipe 3 comprises a second pipe body 32 and a second pipe diameter changing part 33, the second pipe diameter changing part 33 is arranged at the upper end of the second pipe body 32, the pipe diameter of the second pipe diameter changing part 33 is greater than that of the second pipe body 32, the second pipe body 32 and the second pipe diameter changing part 33 are connected through a third transition section 34, the lower end of the second connecting sleeve 4 is nested in the second pipe diameter changing part 33, and the second connecting sleeve 4 and the second pipe diameter changing part 33 are welded and fixed by tunnel furnace brazing. The inner wall surface of the second connecting sleeve 4 comprises an anti-dripping extension surface 42 and a welding matching surface 41, and the inner diameters of the anti-dripping extension surface 42 and the welding matching surface 41 are equal. The first connecting sleeve 2 partially extends into the second connecting sleeve 4, the upper end of the second connecting sleeve 4 abuts against the first protrusion 21 of the first connecting sleeve 2, the first connecting sleeve 2 is welded and fixed with the welding matching surface 41, and the welding length L7 is 10 mm. The anti-dripping extension surface 42 is located below the welding matching surface 41, the anti-dripping extension surface 42 extends downward to the third transition section 34, the excess solder at the welding matching surface 41 can drip onto the anti-dripping extension surface 42, the anti-dripping extension surface 42 can adsorb the dripping solder, preventing the solder from further dripping onto the lower components, thereby further preventing the internal sliding components of the lower components from being stuck or producing abnormal sound.

[0127] The minimum axial distance between the first transition section 13 and the welding matching surface 41 is 28 mm, and the length L6 of the anti-dripping extension surface 42 is 15 cm.

[0128] According to the air conditioner of the embodiment of the present application, the excess welding material at the welding position of the first pipe assembly 10 and the second pipe assembly 20 of the pipe device of the above embodiment can be adhered on the anti-dripping extension surface 42, so as to prevent the welding material from further dripping on the components below the pipe device, and further prevent the internal sliding components of the components below from being stuck or generating abnormal sound, which is beneficial to prolong the service life of the air conditioner.

[0129] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the present specification.

[0130] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A plumbing device, characterized by, The application relates to a pipe device. The first pipe assembly comprises a first pipe and a first connecting sleeve arranged at the end of the first pipe, the first connecting sleeve has a matching part nested with the first pipe, the material of the first pipe comprises a first metal, and the material of the first connecting sleeve comprises a second metal. The second pipe assembly comprises a second pipe and a second connecting sleeve connected with the second pipe, the material of the second pipe comprises the first metal, the material of the second connecting sleeve comprises the second metal, the inner wall surface of the second connecting sleeve comprises a welding matching surface and a drip-proof extension surface, the first connecting sleeve is at least partially inserted into the second connecting sleeve and fixed with the welding matching surface, the drip-proof extension surface is arranged at the end of the welding matching surface away from the first connecting sleeve, the length of the drip-proof extension surface is not less than the length of the welding matching surface, and the drip-proof extension surface is used for adsorbing the dropped solder. The thermal conductivity of the second metal is higher than that of the first metal.

2. The plumbing device of claim 1, wherein, The inner diameter of the drip-proof extension surface is equal to that of the welding matching surface.

3. The plumbing device of claim 1, wherein, The pipe diameter of the second pipe and the second connecting sleeve is different, the second pipe and the second connecting sleeve are connected through a second transition section, and the end of the drip-proof extension surface away from the welding matching surface extends to the second transition section.

4. The plumbing device of claim 1, wherein, The second connecting sleeve is nested with the second pipe.

5. The plumbing device of claim 4, wherein, The second pipe comprises a second pipe body and a second pipe diameter changing part arranged at the end of the second pipe body, the pipe diameter of the second pipe diameter changing part is different from that of the second pipe body, the second pipe body and the second pipe diameter changing part are connected through a third transition section, the second connecting sleeve is nested with the second pipe diameter changing part and fixed through welding, and the drip-proof extension surface extends to the third transition section.

6. The plumbing device of claim 1, wherein, The length of the drip-proof extension surface is not less than 10 mm.

7. The plumbing device of claim 1, wherein, A first convex part is further arranged on the inner wall surface or the outer wall surface of the first connecting sleeve, and the first convex part is positioned at the free end surface of the second connecting sleeve.

8. The plumbing device of claim 7, wherein, The first convex part is configured as a plurality of first convex parts arranged at intervals in the circumferential direction of the first connecting sleeve, or the first convex part is configured as a first annular convex part continuously arranged in the circumferential direction of the first connecting sleeve.

9. The plumbing device of claim 1, wherein, A second convex part is further arranged on the inner wall surface or the outer wall surface of the second connecting sleeve, and the second convex part is positioned at the free end surface of the first connecting sleeve.

10. The plumbing device of claim 9, wherein, The second convex part separates the welding matching surface and the drip-proof extension surface in the axial direction of the pipe device.

11. The plumbing device of claim 10, wherein, The second convex part is configured as a plurality of second convex parts arranged at intervals in the circumferential direction of the second connecting sleeve, or the second convex part is configured as a second annular convex part continuously arranged in the circumferential direction of the second connecting sleeve.

12. The plumbing device of claim 1, wherein, The first pipe comprises a first pipe body and a first pipe diameter changing part arranged at the end of the first pipe body, the pipe diameter of the first pipe diameter changing part is different from that of the first pipe body, and the first connecting sleeve is nested with the first pipe diameter changing part and fixed through welding.

13. The plumbing device of claim 12, wherein, The first pipe body and the first pipe diameter changing part are connected through a first transition section, and the first transition section is offset from the welding cooperation surface in the axial direction of the pipe device.

14. The plumbing device of claim 13, wherein, The minimum axial distance between the first transition section and the welding cooperation surface is not less than 18 mm.

15. The plumbing device according to claim 12 or 13, characterized in that The end surface of the first pipe diameter changing part is flush with the end surface of the first connecting sleeve.

16. The plumbing fixture of any one of claims 1-14, wherein, The first connecting sleeve partially extends into the second connecting sleeve.

17. The plumbing fixture of any one of claims 1-14, wherein, The first metal is iron, and / or the second metal is copper.

18. An air conditioner characterized by comprising: A pipe device according to any one of claims 1-17.

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