CN219140085U - Pipe fitting for air conditioner - Google Patents

Abstract

The application provides a pipe fitting for air conditioner relates to pipe fitting connection technical field. The pipe fitting for the air conditioner comprises a pipe fitting main body and a connecting sleeve; the pipe fitting main part includes middle part pipe and the connecting pipe that is located the middle part pipe both ends, and middle part pipe and connecting pipe components of a whole that can function independently set up, and the one end and the corresponding adapter sleeve welded fastening of every connecting pipe, the other end and the corresponding tip welded fastening of middle part pipe of the connecting pipe that every welding has the adapter sleeve. Two connecting pipes and a middle pipe are formed by cutting the pipe fitting main body, and only the two connecting pipes are required to be welded with the corresponding connecting sleeves respectively, and then the connecting pipes are welded with the middle pipe. Therefore, the assembly of the pipe fitting and the connecting sleeve for the air conditioner can be satisfied, and the whole pipe fitting main body is not required to be placed in a tunnel furnace so as to weld the connecting sleeve at two ends of the pipe fitting main body. Because the connecting pipe is small, the space occupied when being welded with the connecting sleeve is small, the mass production is convenient, the production efficiency is improved, and the production cost is reduced.

Description

Pipe fitting for air conditioner

Technical Field

The application relates to the technical field of pipe fitting connection, in particular to a pipe fitting for an air conditioner.

Background

In air conditioning systems, various plumbing is commonly used to connect to different air conditioning components. Wherein, stainless steel pipe fitting is before being connected with air conditioning component, often need the welding copper sheathing at the both ends of pipe fitting. Generally, the stainless steel pipe fitting and the copper sleeve are integrally arranged in the tunnel furnace for welding, and large-scale production is not easy to realize due to the large occupied area of the stainless steel pipe fitting.

Disclosure of Invention

Accordingly, it is necessary to provide an air conditioning pipe fitting that can be mass-produced.

A pipe fitting for air conditioner comprises a pipe fitting main body and a connecting sleeve; the pipe fitting main body comprises a middle pipe and connecting pipes positioned at two ends of the middle pipe, the middle pipe and the connecting pipes are arranged in a split mode, one end of each connecting pipe is welded and fixed with the corresponding connecting sleeve, and the other end of each connecting pipe welded with the connecting sleeve is welded and fixed with the corresponding end of the middle pipe.

It can be understood that the pipe fitting main body is divided into two connecting pipes and a middle pipe, and only the two connecting pipes are required to be welded with the corresponding connecting sleeves respectively, and then the connecting pipes are welded with the middle pipe. Therefore, the assembly of the pipe fitting and the connecting sleeve for the air conditioner can be satisfied, and the whole pipe fitting main body is not required to be placed in a tunnel furnace so as to weld the connecting sleeve at two ends of the pipe fitting main body. Because the connecting pipe is small, the space occupied when being welded with the connecting sleeve is small, the mass production is convenient, the production efficiency is improved, and the production cost is reduced.

In one embodiment, the connecting sleeve is configured with a connecting through hole; one end part of each connecting pipe, which is away from the middle pipe, is inserted into the corresponding connecting through hole of the connecting sleeve and is in interference fit with the connecting sleeve.

It will be appreciated that such an arrangement enables the inner side wall of the connection sleeve to be in close engagement with the outer side wall of the connection tube to effect an assembled securement prior to welding.

In one embodiment, the connecting sleeve comprises a first connecting sleeve, the connecting pipe comprises a first connecting pipe, and the first connecting sleeve comprises a first matching part, a first stopping part and a second matching part; the first cooperation portion passes through first backstop portion with the second cooperation portion links to each other, the first connecting pipe deviates from the one end of middle part pipe is located the connecting hole that first cooperation portion formed, and with first backstop portion butt, the periphery wall of first connecting pipe with the laminating of the inner peripheral wall of first cooperation portion, first connecting pipe with first cooperation portion welded connection.

It can be understood that the first stop part can limit the depth of the connecting pipe inserted into the connecting sleeve, plays a limiting role on the connecting pipe, and ensures that the connecting length of the connecting pipe and the connecting sleeve meets the connecting requirement. The arrangement of the first matching part and the second matching part can ensure that the connecting pipe and the air conditioning element have enough matching length when being respectively connected with the connecting sleeve so as to ensure the connection stability.

In one embodiment, the diameter of the first stop portion gradually decreases along the direction in which the first connecting tube extends into the first mating portion, and the inner pipe diameter of the first mating portion is larger than the inner pipe diameter of the second mating portion.

It is to be understood that the arrangement is such that the first connecting tube, after extending into the first connecting sleeve, abuts against the first stop, and the first connecting sleeve is able to connect a tube piece in an air conditioning element smaller than the tube diameter of the first connecting tube with the first connecting tube.

In one embodiment, the connecting sleeve comprises a second connecting sleeve, the connecting sleeve comprises a second connecting pipe, one end of the second connecting pipe, which is away from the middle pipe, is located at a connecting through hole formed in the inner peripheral wall of the second connecting sleeve, the outer peripheral wall of the second connecting pipe is attached to the inner peripheral wall of the second connecting sleeve, and the second connecting pipe is connected with the second connecting sleeve in a welding mode.

It can be understood that the second connecting sleeve can directly connect the second connecting pipe with the pipe fitting in the air conditioning element, and the operation is simple and convenient.

In one embodiment, the material of the connecting pipe is the same as the material of the middle pipe, and the material of the connecting sleeve is different from the material of the connecting pipe and the material of the middle pipe.

It can be understood that the arrangement is convenient for the connecting pipe and the middle pipe to be mutually and self-fluxing welded, so that the use of welding flux is reduced; the connecting sleeve is arranged and made of different materials from the connecting sleeve and the connecting sleeve so as to be convenient for welding with the air conditioning element.

In one embodiment, the connecting sleeve is made of copper, and the connecting tube and the middle tube are made of stainless steel.

It can be understood that the connecting sleeve is made of copper and is convenient to be connected with the copper pipe in the air conditioning element, and the connecting pipe and the middle pipe are made of stainless steel, so that the connecting sleeve has better corrosion resistance and is convenient for transporting fluid.

In one embodiment, the connecting pipe and the connecting sleeve are welded by brazing, and the connecting pipe and the middle pipe are welded by argon arc welding or laser welding.

It can be appreciated that the adoption of the brazing process is convenient for realizing mass production and improving the production efficiency. The argon arc welding or the laser welding is used, only the joint of the first connecting pipe and the middle pipe and the joint of the second connecting pipe and the middle pipe are required to be locally heated, the operation is simple, the welding speed is high, and the production efficiency is improved.

In one embodiment, the port of one end of at least one connecting pipe facing the middle pipe is abutted with the port of the corresponding end of the middle pipe and is mutually attached; or, at least one connecting pipe is provided with a second stop part towards one end of the middle pipe, the connecting pipe provided with the second stop part is sleeved on the periphery of the end corresponding to the middle pipe, and the second stop part is in butt joint with the end of the middle pipe.

It can be understood that the connecting pipe and the middle pipe adopt a direct butt welding mode, and can be connected by mutual self-fusion welding without welding flux, so that the operation is simple; the second stop part is arranged to limit the length of the connection fit so as to meet the size requirement of the pipe fitting, and the connection area can be increased by welding in the plugging mode, so that the connection stability is improved.

In one embodiment, the middle tube is a U-shaped tube, an L-shaped tube, or an S-shaped tube.

It will be appreciated that setting the middle tube to different shapes can accommodate different operating conditions.

Drawings

In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings that are required to be used in the description of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a plan view of an air conditioning pipe fitting provided in the present application;

FIG. 2 is a cross-sectional view at A in FIG. 1;

FIG. 3 is a partial enlarged view at B in FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 2 at C;

fig. 5 is a front view of the air conditioning pipe provided by the present application.

Reference numerals: 100. pipe fittings for air conditioner; 10. a pipe body; 20. connecting sleeves; 11. a connecting pipe; 12. a middle tube; 111. a first connection pipe; 112. a second connection pipe; 21. a first connection sleeve; 22. a second connecting sleeve; 211. a first mating portion; 212. a second mating portion; 213. a first stop.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used in the description of the present application for purposes of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact of the first feature with the second feature, or an indirect contact of the first feature with the second feature via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The term "and/or" as used in the specification of this application includes any and all combinations of one or more of the associated listed items.

At present, when a stainless steel pipe and an air conditioning element are used, copper pipes are mostly used on the air conditioning element, so copper sleeves are needed to be welded on two ends of the stainless steel pipe so as to be connected with the copper pipes on the air conditioning element. However, in the welding process, in order to improve production, the stainless steel pipes and the copper sleeves are required to be entirely placed into the tunnel furnace for welding, but when the structure of the stainless steel pipes is complex and the occupied area is large, the connection of the stainless steel pipes and the copper sleeves cannot be completed in the tunnel furnace at the same time, and further, mass production cannot be realized, the production efficiency is low, a large amount of cost is input in the same time, and mass production cannot be obtained, so that the production cost is high.

In view of the above problems, the present application provides an air conditioning pipe fitting 100 so as to finish welding of a stainless steel pipe and a copper sleeve in a small space of a tunnel furnace. Specifically, referring to fig. 1 to 5, an air conditioning pipe 100 includes a pipe body 10; the pipe fitting body 10 is welded with the air conditioning element through the connecting sleeve 20 (i.e., the copper sleeve described above); the pipe fitting body 10 includes a middle pipe 12 and connecting pipes 11 located at both ends of the middle pipe 12, one end of each connecting pipe 11 is welded and fixed with a corresponding end of the middle pipe 12, and one end of each connecting pipe 11 facing away from the middle pipe 12 is used for welding a connecting sleeve 20.

For convenience of description, the two connecting pipes 11 at two ends are divided into a first connecting pipe 111 and a second connecting pipe 112, the connecting sleeve 20 is divided into a first connecting sleeve 21 and a second connecting sleeve 22, then the first connecting pipe 111 corresponds to the first connecting sleeve 21, the second connecting pipe 112 corresponds to the second connecting sleeve 22, one end of the first connecting sleeve 21, which is away from the first connecting pipe 111, is used for welding with an air conditioning element, and one end of the second connecting sleeve 22, which is away from the second connecting pipe 112, is used for welding with another air conditioning element.

Therefore, when the air conditioning pipe fitting 100 provided in this embodiment is adopted, only the first connecting pipe 111 is welded to the first connecting sleeve 21, the second connecting pipe 112 is welded to the second connecting sleeve 22, and then the first connecting pipe 111 and the second connecting pipe 112 are respectively welded to the middle pipe 12, so that the welding of the whole pipe fitting body 10 and the two connecting sleeves 20 can be realized. Compared with the integral welding in the prior art, the split welding is performed by splitting the whole pipe body 10 into the first connecting pipe 111 and the second connecting pipe 112. Because the volumes of the first connecting pipe 111 and the second connecting pipe 112 are smaller than the whole pipe fitting main body 10, a plurality of first connecting pipes 111 or second connecting pipes 112 and the connecting sleeve 20 can be welded at one time during welding, so that mass production is realized, the production efficiency is improved, and the production cost is reduced.

In actual operation, the first connecting pipe 111 and the middle pipe 12, and the second connecting pipe 112 and the middle pipe 12 can be connected by argon arc welding or laser welding, so that the welding speed is high, and mass production is facilitated. When argon arc welding or laser welding is used, only the joint of the first connecting pipe 111 and the middle pipe 12 is required to be locally heated, and the second connecting pipe 112 and the middle pipe 12 are also easy to operate and high in welding speed.

In a preferred embodiment, the welding is performed using argon arc welding. The argon arc welding is to isolate air outside the welding area by utilizing the protection of argon to the metal welding material, so that the oxidation of the welding area is prevented, and the argon arc welding has the characteristics of high current density, concentrated heat and high welding speed. In another preferred embodiment, laser welding, which is a high-efficiency and precise welding method using a laser beam with high energy density as a heat source, is used, and the deformation amount of the workpiece is low, so that the automatic production is easy to realize.

As shown in fig. 2, in a specific embodiment, the first connection sleeve 21 and the second connection sleeve 22 are each configured with a connection through hole. One end portion of the first connecting tube 111, which is away from the middle tube 12, is inserted into the connecting through hole of the first connecting sleeve 21 and is in interference fit with the first connecting sleeve 21, and one end portion of the second connecting tube 112, which is away from the middle tube 12, is inserted into the connecting through hole of the second connecting sleeve 22 and is in interference fit with the second connecting sleeve 22. By the arrangement, the connecting pipe 11 and the connecting sleeve 20 can be primarily fixed, the next welding of the connecting pipe 11 and the connecting sleeve is facilitated, and the assembly requirement of welding is met. And the outer side wall of the connecting pipe 11 is tightly attached to the inner side wall of the connecting sleeve 20, so that the connecting area is increased, and the connecting strength is improved.

The fitting of the first connection pipe 111 and the first connection sleeve 21 is described as an example.

As shown in fig. 3, in some embodiments, the first connection sleeve 21 is provided with a first stopper 213, and a port of the first connection tube 111 at one end of the connection through hole abuts against the first stopper 213. In this way, the provision of the first stopper 213 can limit the depth of the first connection pipe 111 inserted into the first connection sleeve 21, avoid the length of the first connection pipe 111 inserted into the first connection sleeve 21 from being too deep or too shallow, ensure a sufficient fitting length between the first connection sleeve 21 and the first connection pipe 111, and make the exposed size of the first connection pipe 111 meet the prescribed size requirement.

Further, the first connecting sleeve 21 includes a first mating portion 211 and a second mating portion 212, the first mating portion 211 is connected with the second mating portion 212 through a first stop portion 213, and an inner pipe diameter of the first mating portion 211 is larger than an inner pipe diameter of the second mating portion 212, the first mating portion 211 is used for being sleeved on an outer side of the first connecting pipe 111, and the second mating portion 212 is used for being connected with an air conditioning element.

That is, the first connection pipe 111 is inserted into the connection through hole formed by the first fitting portion 211, and the outer circumferential wall of the first connection pipe 111 at the connection through hole portion may be bonded to the inner circumferential wall of the first fitting portion 211 so as to be welded to the first connection sleeve 21, and the second fitting portion 212 may be welded to the copper pipe of the air conditioning element, thereby welding the air conditioning pipe 100 to the air conditioning element. More specifically, the first stop portion 213 is configured as a first tapered structure, and the diameter of the first tapered structure gradually decreases along the direction of insertion of the first connecting tube 111 relative to the first mating portion 211, so that the port of the first connecting tube 111 can be abutted to the inner wall surface of the first tapered structure, so that the positioning of the first connecting tube 111 and the first connecting sleeve 21 is realized, and the welding quality is also more stable during welding, thereby being beneficial to improving.

It should be noted that, the matching manner of the second connecting tube 112 and the second connecting tube 22 may be the same as the matching manner of the first connecting tube 111 and the first connecting tube 21, that is, the first stop portion 213 is disposed in the lumen of the second connecting tube 22, and the second connecting tube 22 includes a first matching portion 211 and a second matching portion 212, and the first matching portion 211 is sleeved on the outer side of the second connecting tube 112.

In other embodiments, one end of the first connection sleeve 21 may be inserted into the first connection tube 111. The first stopper 213 is disposed at the first connection sleeve 21 to limit the insertion depth of the first connection sleeve 21 into the first connection tube 111. Of course, the second connecting sleeve 22 may be inserted into the second connecting tube 112.

In still another embodiment, as shown in fig. 4, the first stop portion 213 may be disposed on the first connecting sleeve 21, in this embodiment, the second connecting sleeve 22 does not include the first stop portion, the inner peripheral wall of the second connecting sleeve 22 forms a connecting through hole, one end of the second connecting tube 112 facing away from the middle tube 12 is located at the connecting through hole of the second connecting sleeve 22, and the outer peripheral wall of the second connecting tube 112 located at the connecting through hole portion is attached to the inner peripheral wall of the second connecting sleeve 22, and the second connecting tube 112 and the second connecting sleeve 22 are fixed by welding such as brazing; as a further embodiment, it is of course also possible to provide only the second connecting sleeve 22 with a first stop 213, which is sufficient for the connection of the first connecting sleeve 21 to the first connecting tube 111 and for the connection of the second connecting sleeve 22 to the second connecting tube 112.

In a preferred embodiment, the first connecting sleeve 21 and the second connecting sleeve 22 are made of copper material, and the first connecting tube 111, the second connecting tube 112 and the middle tube 12 are made of stainless steel material. Therefore, the copper pipe is hard in texture, not easy to corrode, resistant to high temperature and high pressure, and capable of being used in various environments, so that the copper pipe is mostly used in air conditioning elements. Therefore, the first connecting sleeve 21 and the second connecting sleeve 22 are made of copper materials so as to be convenient for being connected with copper pipes in the air conditioning element. Meanwhile, stainless steel has good corrosion resistance, and the cost of the pipe fitting made of stainless steel is lower than that of the copper pipe fitting, so that the first connecting pipe 111, the second connecting pipe 112 and the middle pipe 12 are made of stainless steel.

As other embodiments, not limited to welding between stainless steel and copper, specifically, in some examples, the material of the two connecting pipes 11 is the same as the material of the middle pipe 12, and the material of the two connecting sleeves 20 is different from the material of the two connecting pipes 11. Wherein, because the material of the connecting pipe 11 is the same as that of the middle pipe 12, the material of the connecting sleeve 20 is different from that of the connecting pipe 11, and the material of the connecting sleeve 20 is different from that of the middle pipe 12. That is, the connecting pipe 11 and the middle pipe 12 are made of the same material, so that the melting points of the connecting pipe 11 and the middle pipe 12 are the same, the connecting pipe 11 and the middle pipe 12 are convenient to perform mutual self-fusion welding, the use of welding flux is reduced, and the processing is more convenient; the material of the connecting sleeve 20 is different from that of the connecting pipe 11, and the material of the connecting sleeve 20 is the same as that of the pipe used by the air conditioning element because the material of the pipe used by the air conditioning element is different from that of the pipe main body 10, so that the connecting sleeve 20 is convenient for welding the connecting pipe 11 with the pipe in the air conditioning element, namely, the material of the connecting pipe 11 and the material of the middle pipe 12 are considered for lowering, and the material of the connecting sleeve 20 is considered for practical application.

In one embodiment, the connecting pipe 11 and the connecting sleeve 20 are welded by brazing _。 Specifically, the connection between the first connecting pipe 111 and the first connecting sleeve 21 and the connection between the second connecting pipe 112 and the second connecting sleeve 22 are filled with solder, and the first connecting pipe 111 and the first connecting sleeve 21, and the second connecting pipe 112 and the second connecting sleeve 22 are assembled and positioned and then are put into a tunnel furnace for brazing and welding, so that mass production can be realized. And the first connecting pipe 111 and the second connecting pipe 112 are small in size, so that positions in assembly can be adjusted conveniently, the solder faces upwards, and the solder can be better infiltrated and filled under the action of gravity when the solder is melted at high temperature in the tunnel furnace. In general, zinc-copper solder is used as the solder, so that the connecting structure can obtain better strength and plasticity.

Wherein, the first connecting pipe 111 and the second connecting pipe 112 are respectively connected with the middle pipe 12 through argon arc welding or laser welding, the welding temperature of the argon arc welding can reach 10000 ℃, and the welding temperature of the laser welding is about 3000 ℃; the first connecting pipe 111 is brazed to the first connecting sleeve 21, and the second connecting pipe 112 is brazed to the second connecting sleeve 22 by using a tunnel furnace, and the welding temperature is about 1400 ℃. Therefore, the temperature at which the first connection pipe 111 and the second connection pipe 112 are welded to the middle pipe 12 is higher than the temperature at which the first connection pipe 111 is welded to the first connection sleeve 21 and the second connection pipe 112 is welded to the second connection sleeve 22.

As shown in fig. 2 to 5, in a preferred embodiment, the pipe body 10 is cut in the radial direction so that the ports of the connection pipe 11 and the ports of the middle pipe 12 are both straight pipe mouths; the port of the connecting tube 11 is in butt joint with the port of the middle tube 12. Specifically, the port of the first connecting pipe 111 is opposite to the port of the middle pipe 12, the end surfaces of the port of the first connecting pipe and the port of the middle pipe are mutually attached, and then the port and the port are welded together, so is the connection of the second connecting pipe 112 and the middle pipe 12. Because the first connecting pipe 111, the second connecting pipe 112 and the middle pipe 12 are made of the same material and are made of stainless steel, and the melting points are consistent, the butt welding mode can be realized through mutual self-welding and welding connection of the first connecting pipe 111, the second connecting pipe 112 and the middle pipe 12, the operation is simple, the automatic production is easy to realize, and the production efficiency is high.

In another preferred embodiment, the first and second connection pipes 111 and 112 are provided with a second stopper toward one end of the middle pipe 12, and both ends of the middle pipe 12 are inserted into the first and second connection pipes 111 and 112, respectively, and abut against the second stopper. The plugging manner can increase the mating area when the first connecting pipe 111 and the second connecting pipe 112 are respectively connected with the middle pipe 12, which is beneficial to enhancing the connection strength. The provision of the second stop portion makes it possible to limit the depth of insertion, and to ensure a large mating surface while meeting the dimensional requirements specified for the middle tube 12.

In a specific embodiment, the second stop portion is configured to be in a second tapered structure, and the diameter of the second tapered structure is gradually reduced along the direction of insertion of the middle tube 12 relative to the first connection tube 111 or the second connection tube 112, so that the end surface of the middle tube 12 can be abutted to the tapered surface of the second tapered structure, and positioning of the first connection tube 111 and the second connection tube 112 and the middle tube 12 respectively is achieved, so that the subsequent welding step is facilitated.

As shown in fig. 2 and 5, in a preferred embodiment, the central tube 12 is U-shaped to facilitate connection of two air conditioning elements on the same side. In other embodiments, the middle tube 12 is L-shaped, enabling connection of two air conditioning elements on both sides at a short distance. Or, the middle pipe 12 is S-shaped, so that a longer pipeline can be contained in a smaller space, the conveying of fluid requiring heat exchange is facilitated, and the heat dissipation effect is enhanced. In further embodiments, the middle tube 12 may be of other shapes, depending on the actual needs.

In the actual installation process, the first connecting pipe 111 is inserted into the first connecting sleeve 21, solder is placed at the pipe orifice end face of the first connecting pipe 111, the inserted structure is placed into a tunnel furnace, and the connection between the first connecting pipe 111 and the first connecting sleeve 21 can be realized after the solder is melted; similarly, the welding operation of the second connection pipe 112 and the second connection sleeve 22 is performed. Then, the end of the first connecting tube 111 facing away from the first connecting sleeve 21 is welded to the end of the middle tube 12 by argon arc welding or laser welding, and the end of the second connecting tube 112 facing away from the second connecting sleeve 22 is welded to the other end of the middle tube 12 by argon arc welding or laser welding. In this way, the connection of the whole pipe body 10 to the connecting sleeve 20 is achieved. The shape of the middle tube 12 may be machined before or after the first connection tube 111 is connected to the first connection sleeve 21 and the second connection tube 112 is connected to the second connection sleeve 22.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of the present application is to be determined by the following claims.

Claims (10)

1. The utility model provides a pipe fitting for air conditioner, its characterized in that includes pipe fitting main part and adapter sleeve, the pipe fitting main part includes middle part pipe and is located the connecting pipe at middle part pipe both ends, middle part pipe with the connecting pipe components of a whole that can function independently sets up, every the one end of connecting pipe with correspond adapter sleeve welded fastening, every welding has the adapter sleeve the other end of connecting pipe with the tip welded fastening that the middle part pipe corresponds.

2. The pipe fitting for an air conditioner according to claim 1, wherein each of the connection sleeves is constructed with a connection through hole;

one end part of each connecting pipe, which is away from the middle pipe, is inserted into the corresponding connecting through hole of the connecting sleeve and is in interference fit with the connecting sleeve.

3. The air conditioner pipe fitting according to claim 2, wherein the connecting sleeve comprises a first connecting sleeve, the connecting pipe comprises a first connecting pipe, and the first connecting sleeve comprises a first mating portion, a first stopper portion, and a second mating portion;

the first cooperation portion passes through first backstop portion with the second cooperation portion links to each other, the first connecting pipe deviates from the one end of middle part pipe is located the connecting hole that first cooperation portion formed, and with first backstop portion butt, the periphery wall of first connecting pipe with the laminating of the inner peripheral wall of first cooperation portion, first connecting pipe with first cooperation portion welded connection.

4. A pipe fitting for an air conditioner according to claim 3, wherein the diameter of the first stopper portion is gradually reduced in a direction in which the first connecting pipe is extended with respect to the first fitting portion, and the inner pipe diameter of the first fitting portion is larger than the inner pipe diameter of the second fitting portion.

5. A pipe fitting for an air conditioner according to claim 3, wherein the connecting sleeve comprises a second connecting sleeve, the connecting pipe comprises a second connecting pipe, one end of the second connecting pipe facing away from the middle pipe is located at a connecting through hole formed in the inner peripheral wall of the second connecting sleeve, the outer peripheral wall of the second connecting pipe is attached to the inner peripheral wall of the second connecting sleeve, and the second connecting pipe is welded with the second connecting sleeve.

6. The pipe fitting for an air conditioner according to any one of claims 1 to 5, wherein the material of the connecting pipe is the same as the material of the middle pipe, and the material of the connecting sleeve is different from the material of the connecting pipe and the material of the middle pipe.

7. The air conditioner pipe fitting according to claim 6, wherein the connecting sleeve is made of copper material, and the connecting pipe and the middle pipe are made of stainless steel material.

8. The pipe fitting for an air conditioner according to claim 7, wherein the connecting pipe and the connecting sleeve are welded by brazing, and the connecting pipe and the middle pipe are welded by argon arc welding or laser welding.

9. The air-conditioning pipe fitting according to any one of claims 1 to 5, wherein a port of one end of at least one of the connection pipes facing the middle pipe is butted with and fitted to a port of a corresponding end of the middle pipe; or, at least one connecting pipe is provided with a second stop part towards one end of the middle pipe, the connecting pipe provided with the second stop part is sleeved on the periphery of the end corresponding to the middle pipe, and the second stop part is in butt joint with the end of the middle pipe.

10. The air conditioner pipe fitting according to claim 9, wherein the middle pipe is a U-shaped pipe, an L-shaped pipe or an S-shaped pipe.

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