Air conditioning branch pipe made of copper sheet

Abstract

The present invention discloses an air-conditioning branch pipe made of copper sheet, aiming to improve the technical performance of the air-conditioning branch pipe, such as pressure resistance and leakage prevention. The air-conditioning branch pipe made of copper sheet of the present invention comprises a three-way pipe fitting, the three connecting pipes of which are respectively connected to the main pipe, the first branch pipe and the second branch pipe, the three-way pipe fitting comprises a main connecting pipe and a first branch connecting pipe and a second branch connecting pipe which are interconnected, the main connecting pipe and the first branch connecting pipe and the second branch connecting pipe are integrally manufactured by copper sheet, the junction of the main connecting pipe, the first branch connecting pipe and the second branch connecting pipe is the copper sheet body, and the main connecting pipe, the first branch connecting pipe and the second branch connecting pipe are all formed by extending the copper sheet.

Description

Technical Field

[0001] The invention relates to the technical field of air-conditioning pipeline equipment, and in particular to an air-conditioning branch pipe manufactured based on copper sheets. Background Art

[0002] The branch pipe formed by the three-way U-shaped pipe used in the existing air-conditioning industry is usually welded with multiple pipes, one of which is bent into a U-shape, and the other pipe is welded to the bent U-shaped pipe. This design has many welding points and complex processes. The produced three-way U-shaped pipe is heavy and difficult to ensure its accuracy. In addition, multi-point welding has high labor costs and is prone to welding leaks. There are welding points inside the pipe body, which affects the flow in the pipe. At present, there is also a three-way pipe fitting formed by extrusion of a pipe, as disclosed in Chinese utility model patent No. ZL202220517402.9, wherein the three-way pipe fitting includes a first pipe, a second pipe and a third pipe, wherein the first pipe is connected to one end of the second pipe to form a U-shaped pipe, and the other end is open, and the third pipe is arranged at the connection between the first pipe and the second pipe. This molding structure is based on a pipe, and a U-shaped pipe and a third pipe are formed by extruding the two ends or one end of the pipe toward the middle. This molding structure is formed by bending and extruding the pipe. During the bending process of the pipe, not only the spacing of the U-shaped pipe is limited by the minimum turning radius, but also fatigue cracks are prone to occur, leading to refrigerant leakage. Summary of the invention

[0003] The purpose of the present invention is to provide an air-conditioning branch pipe made of copper sheets to address the defects and shortcomings of the prior art, so that the spacing of U-shaped pipes is no longer limited by the minimum turning radius, thereby avoiding the occurrence of pipe fatigue cracks.

[0004] In order to achieve the above-mentioned purpose, the present invention provides an air-conditioning branch pipe made of copper sheet, including a three-way pipe fitting, wherein the three connecting pipes of the three-way pipe fitting are respectively connected to the main pipe, the first branch pipe, and the second branch pipe, wherein the three connecting pipes of the three-way pipe fitting include a main connecting pipe and a first branch connecting pipe and a second branch connecting pipe that are interconnected, wherein the main connecting pipe and the first branch connecting pipe and the second branch connecting pipe are integrally manufactured by copper sheet, wherein the junction of the main connecting pipe, the first branch connecting pipe, and the second branch connecting pipe is a copper sheet body, and the main connecting pipe, the first branch connecting pipe, and the second branch connecting pipe are all formed by extending the copper sheet. Since the three-way pipe fitting of the air-conditioning branch pipe made of copper sheet is made of a copper sheet as a whole, the three-way pipe fitting itself does not need to be welded, and there is no bending and no fatigue cracks. The main connecting pipe, the first branch connecting pipe, and the second branch connecting pipe form a trouser-like structure, and the copper sheet body is equivalent to the crotch of the trouser-like structure. Compared with the traditional U-shaped turning structure, it is not limited to shortening the distance between the first branch connecting pipe and the second branch connecting pipe due to the minimum turning radius, but also avoids the occurrence of pipeline fatigue cracks and prevents leakage.

[0005] One end of the main connecting pipe is an open structure, and the other end is a copper sheet body. The outer side of the copper sheet body is an integral extension structure with the wall of the main connecting pipe, and the inner side of the copper sheet body is an integral extension structure with the first branch connecting pipe and the second branch connecting pipe respectively. The extension structure effectively ensures the integrated performance of the main connecting pipe and the first branch connecting pipe and the second branch connecting pipe, avoiding fatigue damage.

[0006] The main connecting tube intersects with the first branch connecting tube and the second branch connecting tube at one end of the copper sheet body. This intersecting structure is more conducive to the main connecting tube and the copper sheet body extending uniformly to the first branch connecting tube and the second branch connecting tube, thereby improving the uniformity of the extension process.

[0007] The copper sheet is a round copper sheet with a diameter of 55-182 mm and a thickness of 1-1.6 mm. After the copper sheet is integrally manufactured, the diameter of the main connecting pipe is 9.5-47 mm, the diameter of the first branch connecting pipe is 9.5-45 mm, and the diameter of the second branch connecting pipe is 9.5-35 mm.

[0008] The copper sheet has a diameter of 55 mm and a thickness of 1 mm. After the copper sheet is integrally manufactured, the diameter of the main connecting pipe is 9.5 mm, the diameter of the first branch connecting pipe is 9.5 mm, and the diameter of the second branch connecting pipe is 9.5 mm. Alternatively, the copper sheet has a diameter of 65 mm and a thickness of 1 mm. After the copper sheet is integrally manufactured, the diameter of the main connecting pipe is 12.7 mm, the diameter of the first branch connecting pipe is 12.7 mm, and the diameter of the second branch connecting pipe is 12.7 mm.

[0009] The copper sheet has a diameter of 80 mm and a thickness of 1.3 mm. After the copper sheet is integrally manufactured, the diameter of the main connecting pipe is 19 mm, the diameter of the first branch connecting pipe is 15 mm, and the diameter of the second branch connecting pipe is 15 mm. Alternatively, the copper sheet has a diameter of 90 mm and a thickness of 1.3 mm. After the copper sheet is integrally manufactured, the diameter of the main connecting pipe is 25 mm, the diameter of the first branch connecting pipe is 19 mm, and the diameter of the second branch connecting pipe is 19 mm.

[0010] The copper sheet has a diameter of 120 mm and a thickness of 1.6 mm. After the copper sheet is integrally manufactured, the diameter of the main connecting pipe is 34 mm, the diameter of the first branch connecting pipe is 25 mm, and the diameter of the second branch connecting pipe is 25 mm.

[0011] The copper sheet has a diameter of 150 mm and a thickness of 1.6 mm. After the copper sheet is integrally manufactured, the diameter of the main connecting pipe is 39 mm, the diameter of the first branch connecting pipe is 35 mm, and the diameter of the second branch connecting pipe is 32 mm.

[0012] The copper sheet has a diameter of 182 mm and a thickness of 1.6 mm. After the copper sheet is integrally manufactured, the diameter of the main connecting pipe is 47 mm, the diameter of the first branch connecting pipe is 45 mm, and the diameter of the second branch connecting pipe is 35 mm.

[0013] The first branch connecting tube and the second branch connecting tube are extended from the outer side of the copper sheet body and the wall of the main connecting tube to form a part of the tube body, the other part of the tube body of the first branch connecting tube is extended from the inner side of the copper sheet body to form the inner hole of the first branch connecting tube, and the other part of the tube body of the second branch connecting tube is extended from the inner side of the copper sheet body to form the inner hole of the second branch connecting tube. The overall uniformity of the three-way pipe fitting is greatly improved through the joint extrusion and extension inside and outside.

[0014] The copper sheet body is a planar structure, and the first branch connecting tube and the second branch connecting tube are perpendicular to the copper sheet body. The walls of the first branch connecting tube and the second branch connecting tube are not adhered to each other, thereby improving the straightness of the air conditioning branch pipes during connection and avoiding connection deviation.

[0015] A method for integrally manufacturing an air-conditioning branch pipe based on copper sheet manufacturing comprises the following steps:

[0016] Step 1: Get a round copper sheet;

[0017] Step 2: The copper sheet of step 1 is passed through a punch press and a hydraulic stretching machine to be stretched into a straight tube with a closed structure at one end and an open structure at the other end;

[0018] Step 3, putting the straight pipe into the mold of the hydraulic press, wherein the mold is provided with a main model pipe, a first branch model pipe, and a second branch model pipe, and a partition column is provided between the first branch model pipe and the second branch model pipe, and the partition column abuts against the closed structure, and under the action of the extrusion fluid of the hydraulic press, the closed structure cooperates with the straight pipe to extend from one pipe to form a first branch connection pipe and a second branch connection pipe, forming a three-way pipe fitting, at which time, one end of the first branch connection pipe of the three-way pipe fitting is the first closed structure, and one end of the second branch connection pipe is the second closed structure, and the straight pipe forms the main connection pipe after being extruded by the hydraulic press;

[0019] Step 4: Cut off the first closed structure and the second closed structure of the three-way pipe obtained in step 3 by a sawing machine, and then expand the first branch connecting pipe and the second branch connecting pipe by a hydraulic press;

[0020] Step 5. Connect the three-way pipe fitting obtained in step 4 to the main pipe by welding the main connecting pipe, connect the first branch connecting pipe by welding the first branch pipe, and connect the second branch connecting pipe by welding the second branch pipe to obtain the air conditioning branch pipe.

[0021] The width of the dividing column determines the spacing between the first branch connecting pipe and the second branch connecting pipe, so that the spacing between the first branch connecting pipe and the second branch connecting pipe is no longer limited by the turning radius. Instead, the spacing between the first branch connecting pipe and the second branch connecting pipe is successively reduced by squeezing the first branch connecting pipe and the second branch connecting pipe out on the diameter on both sides of the dividing column, thereby expanding the minimum space in which the air conditioning branch pipe can be installed.

[0022] The hydraulic press forms a three-way pipe fitting by squeezing a straight pipe at a pressure of 6 to 15 MPa, and the maximum pressure in actual central air-conditioning use is 6 MPa, which means that a full inspection has been completed during manufacturing at pressures above 6 MPa, and the three-way leakage problem is completely solved, further improving the safety and reliability of the use and installation of the central air-conditioning.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are:

[0024] 1. The air-conditioning branch pipe made of copper sheet is made of a copper sheet as a whole. The tee pipe fitting itself does not need to be welded, there is no bending and no fatigue cracks. The main connecting pipe, the first branch connecting pipe and the second branch connecting pipe form a trousers-like structure. The copper sheet body is equivalent to the crotch of the trousers-like structure. Compared with the traditional U-shaped turning structure, it is not limited by the minimum turning radius, shortens the distance between the first branch connecting pipe and the second branch connecting pipe, and avoids pipeline fatigue cracks to prevent leakage.

[0025] 2. The width of the dividing column determines the distance between the first branch connecting pipe and the second branch connecting pipe, so that the distance between the first branch connecting pipe and the second branch connecting pipe is no longer limited by the turning radius of the U-shaped pipe. Instead, the first branch connecting pipe and the second branch connecting pipe are squeezed out on the diameter on both sides of the dividing column, thereby successively reducing the distance between the first branch connecting pipe and the second branch connecting pipe, thereby expanding the minimum space in which the air-conditioning branch pipe can be installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] FIG1 is a schematic diagram of the main structure of an air-conditioning branch pipe made of copper sheets according to the present invention;

[0028] FIG2 is a schematic diagram of the process structure of the integrated manufacturing method of the air-conditioning branch pipe based on copper sheet manufacturing of the present invention;

[0029] FIG3 is a bottom view of the structure of the three-way pipe fitting in the present invention;

[0030] Figure 4 is a schematic diagram of the top structure of the three-way pipe fitting of the present invention;

[0031] Figure 5 is a schematic diagram of the mold and straight pipe installation structure of the hydraulic press of the present invention;

[0032] FIG. 6 is a schematic diagram of the mold and three-way pipe forming structure of the hydraulic press in the present invention. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0034] like Figure 1-Figure 6 As shown, an air conditioning branch pipe made of copper sheet includes a three-way pipe fitting 1, and the three connecting pipes of the three-way pipe fitting 1 are respectively connected to the main pipe 2, the first branch pipe 5, and the second branch pipe 4. The three connecting pipes of the three-way pipe fitting 1 include a main connecting pipe 7 and a first branch connecting pipe 6 and a second branch connecting pipe 3 that are interconnected. The main connecting pipe 7 and the first branch connecting pipe 6 and the second branch connecting pipe 3 are integrally manufactured by a copper sheet 12. The junction of the main connecting pipe 7, the first branch connecting pipe 6, and the second branch connecting pipe 3 is a copper sheet body 13. The main connecting pipe 7, the first branch connecting pipe 6, and the second branch connecting pipe 3 are all formed by extending the copper sheet 12. Of course, the copper sheet 12 can also be switched to other suitable metal materials, and air conditioning branch pipes made of other metal materials should also be within the technical protection scope of the present invention.

[0035] As a preferred structure, one end of the main connecting pipe 7 is an open structure, and the other end is a copper sheet body 13. The outer side of the copper sheet body 13 is an integral extension structure with the tube wall of the main connecting pipe 7, and the inner side of the copper sheet body 13 is an integral extension structure with the first branch connecting pipe 6 and the second branch connecting pipe 3. The main connecting pipe 7 intersects with the first branch connecting pipe 6 and the second branch connecting pipe 3 at one end of the copper sheet body 13, that is, the entire tube body of the first branch connecting pipe 6 and the second branch connecting pipe 3 is formed by the tube wall of the main connecting pipe 7 and the copper sheet body 13 extending inside and outside under the action of the hydraulic press.

[0036] The copper sheet 12 is a round copper sheet with a diameter of 55 to 182 mm and a thickness of 1 to 1.6 mm. After the copper sheet 12 is integrally manufactured, the diameter of the main connecting pipe 7 is 9.5 to 47 mm, the diameter of the first branch connecting pipe 6 is 9.5 to 45 mm, and the diameter of the second branch connecting pipe 3 is 9.5 to 35 mm.

[0037] As a specific implementation scheme 1: the diameter of the copper sheet is 55 mm and the thickness is 1 mm. After the copper sheet 12 is integrally manufactured, the diameter of the main connecting pipe 7 is 9.5 mm, the diameter of the first branch connecting pipe 6 is 9.5 mm, and the diameter of the second branch connecting pipe 3 is 9.5 mm.

[0038] As a specific implementation scheme 2: the diameter of the copper sheet is 65 mm and the thickness is 1 mm. After the copper sheet 12 is integrally manufactured, the diameter of the main connecting pipe 7 is 12.7 mm, the diameter of the first branch connecting pipe 6 is 12.7 mm, and the diameter of the second branch connecting pipe 3 is 12.7 mm.

[0039] As a specific implementation scheme 3: the diameter of the copper sheet is 80 mm, and the thickness is 1.3 mm. After the copper sheet 12 is integrally manufactured, the diameter of the main connecting pipe 7 is 19 mm, the diameter of the first branch connecting pipe 6 is 15 mm, and the diameter of the second branch connecting pipe 3 is 15 mm.

[0040] As a specific implementation scheme 4: the diameter of the copper sheet is 90 mm, and the thickness is 1.3 mm. After the copper sheet 12 is integrally manufactured, the diameter of the main connecting pipe 7 is 25 mm, the diameter of the first branch connecting pipe 6 is 19 mm, and the diameter of the second branch connecting pipe 3 is 19 mm.

[0041] As a specific implementation scheme 5: the diameter of the copper sheet is 120 mm, and the thickness is 1.6 mm. After the copper sheet 12 is integrally manufactured, the diameter of the main connecting pipe 7 is 34 mm, the diameter of the first branch connecting pipe 6 is 25 mm, and the diameter of the second branch connecting pipe 3 is 25 mm.

[0042] As a specific implementation scheme 6: the diameter of the copper sheet is 150 mm, and the thickness is 1.6 mm. After the copper sheet 12 is integrally manufactured, the diameter of the main connecting pipe 7 is 39 mm, the diameter of the first branch connecting pipe 6 is 35 mm, and the diameter of the second branch connecting pipe 3 is 32 mm.

[0043] As a specific implementation scheme 7: the diameter of the copper sheet is 182 mm, and the thickness is 1.6 mm. After the copper sheet 12 is integrally manufactured, the diameter of the main connecting pipe 7 is 47 mm, the diameter of the first branch connecting pipe 6 is 45 mm, and the diameter of the second branch connecting pipe 3 is 35 mm.

[0044] In order to further improve the uniformity of the extended forming of the three-way pipe fitting 1, the first branch connecting tube 6 and the second branch connecting tube 3 extend from the outer side of the copper sheet body 13 and the tube wall of the main connecting tube 7 to form a part of the tube body, and another part of the tube body of the first branch connecting tube 6 extends from the inner side of the copper sheet body 13 to form the first branch connecting tube inner hole 14, and another part of the tube body of the second branch connecting tube 3 extends from the inner side of the copper sheet body 13 to form the second branch connecting tube inner hole 15.

[0045] In order to ensure that the distance between the first branch connecting tube and the second branch connecting tube is no longer limited by the turning radius of the U-shaped pipe, the copper sheet body 13 is a planar structure, the first branch connecting tube 6 and the second branch connecting tube 3 are perpendicular to the copper sheet body 13, and the tube walls of the first branch connecting tube 6 and the second branch connecting tube 3 are not adhered to each other, which greatly reduces the distance between the first branch connecting tube 6 and the second branch connecting tube 3 and avoids the leakage problem caused by the most traditional welding connection between the first branch connecting tube 6 and the second branch connecting tube 3.

[0046] A method for integrally manufacturing an air-conditioning branch pipe based on copper sheet manufacturing comprises the following steps:

[0047] Step 1, obtaining a circular copper sheet 12;

[0048] Step 2: The copper sheet 12 of step 1 is passed through a punch press and a hydraulic stretching machine to be stretched into a straight tube 10 with a closed structure 11 at one end and an open structure at the other end;

[0049] Step 3, put the straight pipe 10 into the mold 17 of the hydraulic press, the mold 17 is provided with a main model pipe 16, a first branch model pipe 19, and a second branch model pipe 18, a partition column 20 is provided between the first branch model pipe 19 and the second branch model pipe 18, the partition column 20 abuts against the closed structure 11, under the action of the extrusion fluid of the hydraulic press, the closed structure 11 cooperates with the straight pipe 10 to extend from one pipe to form a first branch connection pipe 6 and a second branch connection pipe 3, forming a three-way pipe fitting 1, at this time, one end of the first branch connection pipe 6 of the three-way pipe fitting 1 is the first closed structure 8, and one end of the second branch connection pipe 3 is the second closed structure 9, and the straight pipe 10 forms a main connection pipe 7 after being extruded by the hydraulic press;

[0050] Step 4: Cut off the first closed structure 8 and the second closed structure 9 from the three-way pipe fitting 1 obtained in step 3 by a sawing machine, and then expand the first branch connecting pipe 6 and the second branch connecting pipe 3 by a hydraulic press;

[0051] Step 5: The three-way pipe fitting 1 obtained in step 4 is welded to the main pipe 2 by the main connecting pipe 7, the first branch connecting pipe 6 is welded to the first branch pipe 5, and the second branch connecting pipe 3 is welded to the second branch pipe 4 to obtain an air conditioning branch pipe. The obtained air conditioning branch pipe can further be deburred and pickled to improve the surface performance of the air conditioning branch pipe.

[0052] As a preferred method, the width of the partition column 20 determines the spacing between the first branch connection pipe 6 and the second branch connection pipe 3. The hydraulic press squeezes the straight pipe 10 at a pressure of 6 to 15 MPa to form the three-way pipe fitting 1. Because the three-way pipe fitting of the present invention is made by a hydraulic press 6 to 15 MPa water expansion process, and the maximum pressure in actual central air conditioning use is 6 MPa, it is equivalent to a full inspection of pressures above 6 MPa, and the three-way leakage problem is completely solved, which further improves the safety and reliability of the use and installation of central air conditioning.

[0053] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for integrally manufacturing an air-conditioning branch pipe based on copper sheet, comprising a three-way pipe fitting (1), wherein three connecting pipes of the three-way pipe fitting (1) are respectively connected to a main pipe (2), a first branch pipe (5), and a second branch pipe (4), wherein: The three connecting pipes of the three-way pipe fitting (1) include a main connecting pipe (7) and a first branch connecting pipe (6) and a second branch connecting pipe (3) which are interconnected. The main connecting pipe (7) and the first branch connecting pipe (6) and the second branch connecting pipe (3) are integrally manufactured by using a copper sheet (12). The junction of the main connecting pipe (7), the first branch connecting pipe (6) and the second branch connecting pipe (3) is a copper sheet body (13). The main connecting pipe (7), the first branch connecting pipe (6) and the second branch connecting pipe (3) are all formed by extending the copper sheet (12). One end of the main connecting pipe (7) is an open structure, and the other end is a copper sheet body (13). The outer side of the copper sheet body (13) is an integral extension structure with the wall of the main connecting pipe (7), and the inner side of the copper sheet body (13) is an integral extension structure with the first branch connecting pipe (6) and the second branch connecting pipe (3). The main connecting pipe (7) intersects with the first branch connecting pipe (6) and the second branch connecting pipe (3) at one end of the copper sheet body (13). The integrated manufacturing method of the air-conditioning branch pipe based on copper sheet includes the following steps: Step 1: Get a round copper piece (12); Step 2: The copper sheet (12) of step 1 is stretched through a punch press and a hydraulic stretching machine to form a straight tube (10) with a closed structure (11) at one end and an open structure at the other end; Step 3, placing the straight pipe (10) into a mold (17) of a hydraulic press, wherein the mold (17) is provided with a main model pipe (16), a first branch model pipe (19), and a second branch model pipe (18), and a partition column (20) is provided between the first branch model pipe (19) and the second branch model pipe (18), and the partition column (20) abuts against the closed structure (11). Under the action of the extrusion fluid of the hydraulic press, the closed structure (11) cooperates with the straight pipe (10) to extend from one pipe to form two pipes, namely, a first branch connecting pipe (6) and a second branch connecting pipe (3), to form a three-way pipe fitting (1). At this time, one end of the first branch connecting pipe (6) of the three-way pipe fitting (1) is the first closed structure (8), and one end of the second branch connecting pipe (3) is the second closed structure (9). After being extruded by the hydraulic press, the straight pipe (10) forms the main connecting pipe (7); Step 4: Cut off the first closed structure (8) and the second closed structure (9) from the three-way pipe fitting (1) obtained in step 3 by a sawing machine, and then expand the first branch connecting pipe (6) and the second branch connecting pipe (3) by a hydraulic press; Step 5: The three-way pipe fitting (1) obtained in step 4 is welded to the main pipe (2) through the main connecting pipe (7), the first branch connecting pipe (6) is welded to the first branch pipe (5), and the second branch connecting pipe (3) is welded to the second branch pipe (4) to obtain an air conditioning branch pipe; The width of the partition column (20) determines the distance between the first branch connection pipe (6) and the second branch connection pipe (3).

2. The method for integrally manufacturing an air-conditioning branch pipe based on copper sheet manufacturing according to claim 1, characterized in that: The copper sheet (12) is a circular copper sheet with a diameter of 55 to 182 mm and a thickness of 1 to 1.6 mm. After the copper sheet (12) is integrally manufactured, the diameter of the main connecting pipe (7) is 9.5 to 47 mm, the diameter of the first branch connecting pipe (6) is 9.5 to 45 mm, and the diameter of the second branch connecting pipe (3) is 9.5 to 35 mm.

3. The method for integrally manufacturing an air-conditioning branch pipe based on copper sheet manufacturing according to claim 2, characterized in that: The copper sheet has a diameter of 55 mm and a thickness of 1 mm. After the copper sheet (12) is integrally manufactured, the diameter of the main connecting pipe (7) is 9.5 mm, the diameter of the first branch connecting pipe (6) is 9.5 mm, and the diameter of the second branch connecting pipe (3) is 9.5 mm. Alternatively, the copper sheet has a diameter of 65 mm and a thickness of 1 mm. After the copper sheet (12) is integrally manufactured, the diameter of the main connecting pipe (7) is 12.7 mm, the diameter of the first branch connecting pipe (6) is 12.7 mm, and the diameter of the second branch connecting pipe (3) is 12.7 mm. Alternatively, the copper sheet has a diameter of 80 mm and a thickness of 1.3 mm. After the copper sheet (12) is integrally manufactured, the diameter of the main connecting pipe (7) is 19 mm, the diameter of the first branch connecting pipe (6) is 15 mm, and the diameter of the second branch connecting pipe (3) is 15 mm. Alternatively, the copper sheet has a diameter of 90 mm and a thickness of 1.3 mm. After the copper sheet (12) is integrally manufactured, the diameter of the main connecting pipe (7) is The diameter of the main connecting pipe (7) is 25 mm, the diameter of the first branch connecting pipe (6) is 19 mm, and the diameter of the second branch connecting pipe (3) is 19 mm, or the diameter of the copper sheet is 120 mm and the thickness is 1.6 mm, and after the copper sheet (12) is integrally manufactured and formed, the diameter of the main connecting pipe (7) is 34 mm, the diameter of the first branch connecting pipe (6) is 25 mm, and the diameter of the second branch connecting pipe (3) is 25 mm, or the diameter of the copper sheet is 150 mm and the thickness is 1.6 mm, and after the copper sheet (12) is integrally manufactured and formed, the diameter of the main connecting pipe (7) is 39 mm, the diameter of the first branch connecting pipe (6) is 35 mm, and the diameter of the second branch connecting pipe (3) is 32 mm, or the diameter of the copper sheet is 182 mm and the thickness is 1.6 mm, and after the copper sheet (12) is integrally manufactured and formed, the diameter of the main connecting pipe (7) is 47 mm, the diameter of the first branch connecting pipe (6) is 45 mm, and the diameter of the second branch connecting pipe (3) is 35 mm.

4. The method for integrally manufacturing an air-conditioning branch pipe based on copper sheet manufacturing according to claim 1, characterized in that: The first branch connecting tube (6) and the second branch connecting tube (3) are integrally extended from the outer side of the copper sheet body (13) and the wall of the main connecting tube (7) to form a portion of the tube body; another portion of the tube body of the first branch connecting tube (6) is extended from the inner side of the copper sheet body (13) to form a first branch connecting tube inner hole (14); another portion of the tube body of the second branch connecting tube (3) is extended from the inner side of the copper sheet body (13) to form a second branch connecting tube inner hole (15).

5. The method for integrally manufacturing an air-conditioning branch pipe based on copper sheet manufacturing according to claim 1, characterized in that: The copper sheet body (13) is a planar structure, the first branch connecting tube (6) and the second branch connecting tube (3) are perpendicular to the copper sheet body (13), and the walls of the first branch connecting tube (6) and the second branch connecting tube (3) are not adhered to each other.

6. The method for integrally manufacturing an air-conditioning branch pipe based on copper sheet manufacturing according to claim 1, characterized in that: The hydraulic press extrude the straight pipe (10) at a pressure of 6 to 15 MPa to form a three-way pipe fitting (1).

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