Refrigeration pipeline piece and refrigeration equipment

Abstract

The utility model discloses a refrigeration pipeline piece and refrigeration equipment, the refrigeration pipeline piece comprises a first distribution pipe, a transition connecting pipe and a second distribution pipe, the first distribution pipe is used for connecting a multi-way valve assembly, the second distribution pipe is used for connecting a compressor, and the first distribution pipe and the second distribution pipe are connected through the transition connecting pipe; the first piping is made of stainless steel, the transition connecting pipe and the second piping are made of copper, the transition connecting pipe is arranged on the peripheral side of the first piping in a sleeving mode, the second piping is arranged on the peripheral side of the transition connecting pipe in a sleeving mode, and the radial projection of the first piping and the radial projection of the second piping in the radial direction of the refrigeration pipeline piece are perpendicular to each other. The first piping, the transition connecting pipe and the second piping are at least partially overlapped. The problems that a pipeline port of the multi-way valve assembly is affected by vibration for a long time, the tensile strength of the transition connecting pipe is low, and the transition connecting pipe is prone to breakage can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration, in particular to a refrigeration pipe fitting and a refrigeration equipment. BACKGROUND

[0002] The refrigeration pipe fitting is a key component for assembling the components in the refrigeration system together, and currently, red copper material is mostly used, which has high cost. In the related art, in order to reduce the cost, the main pipe is changed to stainless steel, and a transition copper pipe is left at both ends to facilitate welding with other red copper pipes. The welding between the stainless steel and the transition copper pipe is mostly tunnel furnace welding, and after the welding is completed, the crystal structure of the transition copper pipe changes, which reduces the tensile strength. In particular, the refrigeration pipe fitting connected to the compressor part is prone to metal fatigue fracture due to vibration of the compressor. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present application is to provide a refrigeration pipe fitting and a refrigeration equipment, which can improve the problem of easy fracture of the connection of the refrigeration pipe fitting.

[0004] The present application provides a refrigeration pipe fitting, which comprises a first pipe, a transition connecting pipe and a second pipe, the first pipe is used for connecting a multi-way valve assembly, the second pipe is used for connecting a compressor, and the first pipe and the second pipe are connected through the transition connecting pipe; the material of the first pipe is stainless steel, the materials of the transition connecting pipe and the second pipe are copper, the transition connecting pipe is sleeved on the outer circumferential side of the first pipe, the second pipe is sleeved on the outer circumferential side of the transition connecting pipe, and in the projection along the radial direction of the refrigeration pipe fitting, the first pipe, the transition connecting pipe and the second pipe at least partially overlap.

[0005] The present application uses stainless steel as the material of the first pipe, uses copper as the material of the transition connecting pipe and the second pipe, the transition connecting pipe is sleeved on the outer circumferential side of the first pipe, the second pipe is sleeved on the outer circumferential side of the transition connecting pipe, and in the projection along the radial direction of the refrigeration pipe fitting, the first pipe, the transition connecting pipe and the second pipe at least partially overlap, the transition connecting pipe has double-layer thickening of the first pipe and the second pipe, and the problem of easy fracture of the connection of the refrigeration pipe fitting caused by insufficient rigidity of the transition connecting pipe is improved, and the fatigue resistance and the tensile strength of the refrigeration pipe fitting are increased.

[0006] The application also provides a refrigeration device, which comprises a compressor, a multi-way valve assembly and a refrigeration pipe assembly, the refrigeration pipe assembly comprises a first pipe, a transition connecting pipe and a second pipe, the first pipe is used for connecting the multi-way valve assembly, the second pipe is used for connecting the compressor, and the first pipe and the second pipe are connected through the transition connecting pipe; the first pipe, the transition connecting pipe and the second pipe at least partially overlap in the projection along the radial direction of the refrigeration pipe assembly; the first pipe and the transition connecting pipe are welded by means of furnace welding, and the second pipe and the transition connecting pipe are welded by means of flame welding.

[0007] The application connects the compressor and the multi-way valve assembly through the refrigeration pipe assembly, the first pipe, the transition connecting pipe and the second pipe of the refrigeration pipe assembly at least partially overlap in the radial direction, so that the fatigue resistance and tensile strength of the connection position are strengthened, the resonance of the compressor and the valve assembly is weakened, and the noise problem of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 The multi-way valve assembly structure shown in an embodiment of the application is shown in the figure;

[0009] Figure 2 The refrigeration pipe assembly structure shown in an embodiment of the application is shown in the figure;

[0010] Figure 3 The first pipe structure shown in an embodiment of the application is shown in the figure;

[0011] Figure 4 The exhaust pipe assembly structure shown in an embodiment of the application is shown in the figure;

[0012] Figure 5 The condenser pipe assembly structure shown in an embodiment of the application is shown in the figure;

[0013] Figure 6 The gas return pipe assembly structure shown in an embodiment of the application is shown in the figure;

[0014] Figure 7 The low-pressure valve pipe assembly structure shown in an embodiment of the application is shown in the figure.

[0015] REFERENCE SIGNS:

[0016] 2-multi-way valve assembly, 3-first pipe, 4-second pipe, 5-transition connecting pipe, 6-silencer component;

[0017] 21-exhaust pipe assembly, 22-condenser pipe assembly, 23-gas return pipe assembly, 24-low-pressure valve pipe assembly;

[0018] 31 - contraction section, 32 - first connecting section, 41 - flared section, 42 - second connecting section, 51 - groove, 52 - guide portion. DETAILED DESCRIPTION

[0019] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, unless otherwise indicated, like numbers in the attached drawings refer to the same or similar elements. The following detailed description includes specific details for the purpose of providing a thorough understanding of the exemplary embodiments. However, it will be apparent to those skilled in the art that the exemplary embodiments can be practiced without these specific details. In some instances, well-known structures and components are not described in detail in order to avoid obscuring the understanding of the present description.

[0020] It should be understood that the use of "first", "second", and "third" words of similar meaning in the specification and claims of this application does not indicate any order, quantity, or importance, but is only used to distinguish different components. Similarly, "one" or "a" and similar words do not indicate a quantity limitation, but indicate the presence of at least one; "several" indicates a quantity of two or more, unless otherwise indicated. The orientation words mentioned or possibly mentioned in the text, such as up, down, left, right, front, back, inner side, outer side, top, bottom, etc. are defined with respect to the structure shown in the corresponding drawing, and they are relative concepts, so they can change accordingly according to their different positions, different use states. Therefore, these or other orientation words should not be interpreted as limiting words. "Include" or "contain" and similar words mean that the elements or objects appearing before "include" or "contain" cover the elements or objects listed after "include" or "contain" and their equivalents, and do not exclude other elements or objects.

[0021] The following will be described in detail with reference to the accompanying drawings Figures 1-7 The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features of the embodiments and implementations described below can be supplemented or combined with each other without conflict.

[0022] The present application provides a refrigeration pipe fitting for connecting the pipe of a compressor and a multi-way valve assembly 2, which is connected to the compressor through the connecting pipe of the multi-way valve assembly 2 to exchange heat with the refrigerant. The connecting pipe on the multi-way valve assembly 2 includes a first pipe 3, and the connecting part of the compressor has a second pipe 4, which can also be understood as: the first pipe 3 is used to connect the multi-way valve assembly 2, and the second pipe is used to connect the compressor. In actual application, the second pipe 4 is often made of copper material, and in order to reduce the production cost, the first pipe 3 is preferably made of stainless steel.

[0023] Specifically, the pipe end of the multi-way valve assembly 2 is provided with a transition connecting pipe 5, which is located at the connection of the first pipe 3 and the second pipe 4, that is, the first pipe 3 and the second pipe 4 are connected through the transition connecting pipe 5, and the transition connecting pipe 5 is made of the same or similar copper material as the second pipe 4, which is easy to be welded and fixed with the second pipe 4.

[0024] In an embodiment, the first pipe 3 and the second pipe 4 are respectively sleeved on the inner and outer sides of the transition connecting pipe 5 from both ends of the transition connecting pipe 5, and the projections of the first pipe 3 and the second pipe 4 along the radial direction at least partially overlap. It can be understood that the end of the first pipe 3 is connected to one end of the transition connecting pipe 5, the outer wall of the first pipe 3 is arranged in the same diameter as the inner wall of the transition connecting pipe 5, and the inner and outer walls are nested with each other; the end of the second pipe 4 is connected to the other end of the transition connecting pipe 5, and the inner wall of the second pipe 4 is arranged in the same diameter as the outer wall of the transition connecting pipe 5, and the inner and outer walls are nested with each other.

[0025] Preferably, the ends of the first pipe 3 and the second pipe 4 that extend into the transition connecting pipe 5 after assembly can overlap each other in the radial direction, and the overlapping part of the pipe is the first pipe 3, the transition connecting pipe 5, and the second pipe 4 from the inside to the outside, that is, the first pipe, the transition connecting pipe, and the second pipe at least partially overlap along the projection of the radial direction of the refrigeration pipe. The welding reliability is improved by using the same material welding characteristics of the transition connecting pipe 5 and the second pipe 4, and the stainless steel first pipe 3 as the end support inner core of the second pipe 4 can improve the support rigidity between the connecting pipes.

[0026] In addition, the compressor is a vibration source when it works as a refrigeration system, and the multi-way valve assembly 2 is close to the vibration part for a long time, which causes the copper-made second pipe 4 or the transition connecting pipe 5 to be easily broken due to metal fatigue caused by vibration after welding. The three-layer overlapping connection relationship of the first pipe 3, the transition connecting pipe 5, and the second pipe 4 can well make up the rigidity and weaken the vibration on the compressor to continue to transmit to the multi-way valve assembly.

[0027] Preferably, the transition connecting pipe 5 includes a first end and a second end, and along the axial direction of the refrigeration pipe, the first end extends outward relative to the end face of the second pipe 4 close to the first pipe 3, and the second end extends outward relative to the end face of the first pipe 3 close to the second pipe 4.

[0028] Please refer to Figure 2Fig. 1 is a schematic view of a pipe joint structure according to an embodiment of the present application, the end of the transition pipe 5 is higher than the port of the first pipe 3, and the overlapping part of the first pipe 3 and the second pipe 4 is located in the middle section of the transition pipe 5. Specifically, the transition pipe 5 is located between the first pipe 3 and the second pipe 4, with one end extending outward relative to the port of the first pipe 3 and the opposite end extending outward relative to the port of the second pipe 4, and the overlapping part of the first pipe 3 and the second pipe 4 formed in the middle section of the transition pipe 5. This arrangement can leave part of the extension of the transition pipe 5 to accommodate the overflow of the filler metal in the interlayer during welding, ensuring sufficient welding.

[0029] In addition, in some embodiments, the extended part of the transition pipe 5 can also reinforce the end wall of the second pipe 4. Compared with directly transitioning from the three-layer overlapping section (the first pipe 3, the transition pipe 5, and the second pipe 4) to the second pipe 4, using the decreasing number of overlapping layers to transition, in turn, from the three-layer overlapping section to the two-layer overlapping section (the transition pipe 5 and the second pipe 4) and then to the second pipe 4, that is, adding the two-layer overlapping section (the transition pipe 5 and the second pipe 4) in the middle, can effectively improve the problem of large rigidity difference between the front and rear sections of the connection part of the second pipe 4, uneven stress, and easy breakage.

[0030] Preferably, the end of the first pipe 3 needs to be necked to form a necked section 31 and a first connecting section 32 extending in the axial direction, and the end of the second pipe 4 needs to be flared to form a flared section 41 and a second connecting section 42 extending in the axial direction.

[0031] In an embodiment, the axial length of the first connecting section 32 is d1, the axial length of the second connecting section 42 is d2, and the axial length of the transition pipe 5 is d3, and the length relationship is d3≥d2>d3-d1. It can be understood that if d2≤d3-d1, the first pipe 3 and the second pipe 4 are respectively sleeved on both ends of the transition pipe 5, and there is no overlapping part in the middle, and the rigidity of the pipe joint structure is relatively poor; if d3

[0032] More preferably, the length of the overlapping part of the first pipe 3, the second pipe 4, and the transition pipe 5 is h, and the length relationship of the non-three-layer overlapping area of the transition pipe 5 is d1-h>d3-d1, that is, the axial length of the non-three-layer overlapping area of the transition pipe 5 on the first pipe 3 is longer than that on the second pipe 4. It can be understood that the connecting section of the stainless steel pipe needs to be longer than the connecting section of the copper pipe to be connected, and the force arm of the stainless steel pipe with good rigidity is extended to reduce the stress on the end of the second pipe 4 and improve the problem of easy breakage of the copper pipe.

[0033] In some specific embodiments, the transition pipe 5 protrudes from the first piping 3 by a length equal to d3-d1, where 3mm ≤ d3-d1 ≤ 5mm. This partial protrusion of the transition pipe 5 accommodates excess solder overflowing during welding between the piping gaps. Preferably, the stainless steel pipe of the first connecting section 32 of the first piping 3 is 15mm thick, while the copper pipe of the transition pipe 5 is 20mm thick.

[0034] In an actual operation, the first pipe 3 needs to be subjected to a shrinking process at the position where it connects to the transition pipe 5 to form a shrinking section 31 and a first connecting section 32. The second pipe 4 needs to be subjected to a flaring process at the position where it connects to the transition pipe 5 to form a flaring section 41 and a second connecting section 42. Preferably, the diameters of the front and rear sections of the pipes are roughly equal after the pipes are connected to meet the actual use environment of the pipelines.

[0035] Combine Figure 3 The transition pipe 5 and the first pipe 3 have an interference fit, and the inner wall of the transition pipe 5 and / or the outer wall of the first pipe 3 are provided with grooves 51 for circulating tin bronze solder along the axial direction. The refrigeration pipeline component includes a welding portion, at least part of which is located between the first pipe and the transition pipe. The main component of the welding portion is tin bronze, which improves the corrosion resistance of the welding point.

[0036] In one embodiment, the grooves 51 are linear structures along the axial direction of the first pipe 3. Specifically, there are multiple grooves evenly distributed around the outer circumference of the first connecting section 32, which guide the solder to penetrate inward along the grooves 51, ensuring a sufficient connection between the soldering surfaces. It is understood that the grooves 51 can also be constructed along a curved or broken line, connecting from one end of the first connecting section 32 to the other.

[0037] In addition, a guide portion 52 is further provided at the port of the first pipe 3 . The guide portion 52 is a shrinkage chamfer where the end of the pipe wall gradually converges toward the axis.

[0038] It can be understood that the shrinkage chamfer is an arc-shaped structure. The stainless steel first pipe 3 is harder than the copper transition pipe 5. Under the assembly condition of interference fit, setting the shrinkage chamfer can easily reduce the difficulty of installing the pipe port and improve the situation of scratching and deformation of the copper pipe.

[0039] In the actual manufacturing process, the transition pipe 5 is welded to the first pipe 3 and the second pipe 4 using different welding processes. The first pipe 3 and the transition pipe 5 can be first welded to each other by furnace welding, and then welded to the second pipe 4 by flame brazing. By separately manufacturing the various components of the complex multi-way valve assembly 2 and then directly welding them together by furnace welding, the processing difficulty is reduced and the production efficiency is improved.

[0040] Recombination Figures 4-7The content is a pipe assembly of the multi-way valve assembly 2, specifically, the multi-way valve assembly 2 is a four-way valve switching pipeline, including an exhaust pipe assembly 21, a condenser pipe assembly 22, a return pipe assembly 23, and a low-pressure valve pipe assembly 24, and the pipe ends can be provided with the first pipe 3, and the second pipe 4 is connected to the external functional component through the transition pipe 5.

[0041] In an embodiment, the condenser pipe assembly 22 is connected to the air conditioner condenser interface at the end, and in order to ensure the quality of subsequent welding, positive welding is adopted, and the inner diameter is generally designed to be matched, and the connection structure of the transition pipe 5, the first pipe 3 and the second pipe 4 can be used to ensure the welding strength at this position. Specifically, the processing procedures include, in sequence: blanking, deburring, necking, flaring, cleaning, drying, annealing (solid solution), pipe bending, cleaning, drying, necking sleeve welding ring, copper head sleeve welding ring, assembly, tunnel furnace welding (about 1060 degrees), leak detection, and drying.

[0042] In addition, components similar to the exhaust pipe assembly 21 and the low-pressure valve pipe assembly 24 can increase the silencer component 6 in the middle part of the pipeline, and specifically, the silencer component 6 is located on the side of the transition pipe 5 away from the compressor.

[0043] Preferably, the silencer component 6 is gap-fitted at both ends with the first pipe 3, and is integrally welded by using oxygen-free copper solder through furnace welding, and specifically, the silencer component 6 has a matching gap between the port and the first pipe, and the main component in the matching gap is oxygen-free copper. Compared with tin bronze solder, oxygen-free copper solder has better fluidity, does not need interference assembly, and can relatively improve the disadvantage that the silencer component 6 cannot generate capillary action penetration when the two ends of the pipe are staggered, so that production and preparation are convenient and efficient.

[0044] In an embodiment, the middle section of the exhaust pipe assembly 21 is provided with a stainless steel silencer, and the processing flow is blanking, cleaning, drying, annealing, spinning, cleaning, and screening; the processing procedures of the two ends of the stainless steel pipe are blanking, deburring, necking, pipe bending, cleaning, and drying; and the assembly processing procedures are steel pipe sleeve welding ring (oxygen-free copper solder), assembly, furnace welding (about 1100 degrees), two ends of the stainless steel pipe sleeve tin bronze welding ring, two ends of the stainless steel pipe sleeve transition copper pipe, tunnel furnace welding (about 1060 degrees), leak detection, and drying.

[0045] In combination with the above, the application provides a refrigeration pipeline component, which can improve the problems of insufficient rigidity of the copper connecting pipe, low tensile strength, and easy fracture of the pipeline port of the multi-way valve affected by long-term vibration through the pipe connection mode of the multi-way valve assembly 2 and the external component.

[0046] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and not to limit the technical solutions described in the present application. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the skilled in the art can still modify or equivalently replace the present application, and all technical solutions and improvements that do not deviate from the spirit and scope of the present application should be covered within the protection scope of the present application.

Claims

1. A refrigeration line piece, characterized by, The refrigeration pipe member includes a first pipe, a transition connecting pipe and a second pipe, the first pipe is used for connecting a multi-way valve assembly, the second pipe is used for connecting a compressor, the first pipe and the second pipe are connected through the transition connecting pipe; the material of the first pipe is stainless steel, the materials of the transition connecting pipe and the second pipe are copper, the transition connecting pipe is sleeved on the outer circumferential side of the first pipe, the second pipe is sleeved on the outer circumferential side of the transition connecting pipe, in the projection along the radial direction of the refrigeration pipe member, the first pipe, the transition connecting pipe and the second pipe at least partially overlap; The first pipe (3) includes a first connecting section (32) extending in the axial direction thereof, the axial length of the first connecting section (32) is d1, the axial length of the transition connecting pipe (5) is d3, the length of the overlapping part of the first pipe (3), the second pipe (4) and the transition connecting pipe (5) is h, and the length relationship of the non-three-layer overlapping area of the transition connecting pipe (5) is d1-h>d3-d1. Wherein, d3-d1 satisfies: 3mm≤d3-d1≤5mm.

2. The refrigeration tube component according to claim 1, characterized in that, The transition connecting pipe includes a first end portion and a second end portion, along the axial direction of the refrigeration pipe member, the first end portion extends outward relative to the end face of the first pipe close to the second pipe, and the second end portion extends outward relative to the end face of the second pipe close to the first pipe.

3. The refrigerant tube component according to claim 2, characterized by The first pipe includes a first connecting section extending in the axial direction from an end portion, and the length of the first connecting section is d1. The second pipe includes a second connecting section extending in the axial direction from an end portion, and the length of the second connecting section is d2. The length of the transition connecting pipe is d3, wherein d3≥d2>d3-d1.

4. The refrigerant tube component according to claim 3, characterized by The length of the overlapping part of the first pipe, the second pipe and the transition connecting pipe is h, wherein d1-h>d3-d1.

5. The refrigeration tube fitting set forth in claim 1 wherein, The first pipe has a contraction section at the joint with the transition connecting pipe, the second pipe has an expansion section at the joint with the transition connecting pipe, and the diameters of the contraction section and the expansion section are substantially equal to the diameters of the front and rear sections.

6. The refrigeration tube component according to any one of claims 1 to 5, characterized in that The transition connecting pipe is in interference fit with the first pipe, the inner wall of the transition connecting pipe and / or the outer wall of the first pipe is provided with a groove in the axial direction, the refrigeration pipe member includes a welding portion, at least part of the welding portion is located between the first pipe and the transition connecting pipe, and the main component of the welding portion is tin bronze.

7. The refrigeration tube fitting set forth in claim 1 wherein, The necked end portion of the first pipe is provided with a guide portion, and the guide portion is a contraction chamfer gradually converging to the axis of the pipe wall end portion.

8. The refrigeration tube fitting of claim 1, wherein, The two ends of the transition connecting pipe are respectively welded and fixed with the first pipe and the second pipe by different processes.

9. A refrigeration appliance characterized in that, The refrigeration equipment comprises a compressor, a multi-way valve assembly and a refrigeration pipe assembly, the refrigeration pipe assembly comprises a first pipe, a transition connecting pipe and a second pipe, the first pipe is used for connecting the multi-way valve assembly, the second pipe is used for connecting the compressor, and the first pipe and the second pipe are connected through the transition connecting pipe; in a projection along a radial direction of the refrigeration pipe assembly, the first pipe, the transition connecting pipe and the second pipe at least partially overlap; the first pipe and the transition connecting pipe are welded by means of furnace welding, and the second pipe and the transition connecting pipe are welded by means of flame welding; The first pipe (3) comprises a first connecting section (32) extending in an axial direction thereof, an axial length d1 of the first connecting section (32), an axial length d3 of the transition connecting pipe (5), and a length h of an overlapping portion of the first pipe (3), the second pipe (4) and the transition connecting pipe (5), and a length relationship of a non-overlapping region of the transition connecting pipe (5) is d1-h > d3-d1. Wherein, d3-d1 satisfies: 3mm ≤ d3-d1 ≤ 5mm.

10. The refrigeration appliance of claim 9, wherein, The multi-way valve assembly further comprises a silencer component, the silencer component is located on a side of the transition connecting pipe away from the compressor, a material of the silencer component is stainless steel, a port of the silencer component and the first pipe have a fitting gap, and a main component in the fitting gap is oxygen-free copper.

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