Three-way special-shaped pipe fitting for evaporator

Abstract

The utility model belongs to the technical field of evaporators, in particular to a three-way special-shaped pipe fitting for an evaporator, which comprises a main pipe body, the main pipe body sequentially comprises a head pipe part, a straight pipe part and a tail pipe part from head to tail, the head end of the head pipe part is a port and is a linear pipe section, the straight pipe part is a linear pipe section, and the tail end of the tail pipe part is a port and is a bent pipe section. The head pipe part is connected with the straight pipe part through a first bent transition section, the straight pipe part is connected with the tail end part through a second bent transition section, the head pipe part, the straight pipe part and the tail pipe part are of an integrated structure formed by continuously bending pipes, and the side wall of the straight pipe part locally deforms outwards through hydraulic pressure to form a protruding part. And a bypass port communicated with the inner cavity of the straight pipe part is formed in the end part of the convex part through cutting. The three-way special-shaped pipe fitting is simple in structure and low in cost, the special-shaped design is adopted to meet the distribution requirement of a specific fluid path, and it is ensured that the three-way special-shaped pipe fitting has good overall sealing performance and supporting strength through a continuous bending integrated structure and a hydraulic forming mode.

Description

Technical fields:

[0001] This utility model belongs to the field of evaporator technology, and specifically refers to a three-way irregular pipe fitting used in evaporators. Background technology:

[0002] As one of the core components of refrigeration and air conditioning systems, the performance of the evaporator directly affects the system's energy efficiency and stability. Evaporators require numerous copper pipes and fittings for fluid distribution and convergence. However, most traditional tee fittings on the market are standard T-shaped or Y-shaped pipes, whose structural shapes cannot meet the requirements of certain fluid paths. Especially in the limited installation space of the evaporator, using standard tee fittings can actually make the installation space appear cluttered and disorganized. Summary of the Invention:

[0003] The purpose of this utility model is to provide a three-way irregular pipe fitting for evaporators. Its irregular design meets the specific fluid path distribution requirements, and through a continuous bending integrated structure and hydroforming method, the three-way irregular pipe fitting has good overall sealing performance and support strength.

[0004] This utility model is implemented as follows:

[0005] A three-way shaped pipe fitting for an evaporator includes a main body, which, from head to tail, comprises a first pipe section (a linear pipe section with a port at the head), a straight pipe section (a linear pipe section), and a tail pipe section (a curved pipe section with a port at the tail). The first pipe section and the straight pipe section are connected by a first curved transition section, and the straight pipe section and the tail pipe section are connected by a second curved transition section. The first pipe section, the straight pipe section, and the tail pipe section are integrally formed by continuous bending of the pipe material. The sidewall of the straight pipe section is locally deformed outward by hydraulic pressure to form a protrusion. The end of the protrusion is cut to form a side port communicating with the inner cavity of the straight pipe section.

[0006] In the aforementioned three-way shaped pipe fitting for an evaporator, the straight pipe section located between the protrusion and the second bending transition section has a constricted section whose diameter gradually narrows inward and upward toward the tail pipe section.

[0007] In the aforementioned tee fitting for an evaporator, the minimum diameter of the constricted section is consistent with the diameter of the side branch port.

[0008] In the aforementioned three-way shaped pipe fitting for an evaporator, the length of the constricted section is 1 / 5 to 1 / 3 of the total length of the straight pipe section, the cone angle of the constricted section is 10° to 25°, and the constricted section and the inner wall surface of the straight pipe section have a smooth transition without sharp edges.

[0009] In the aforementioned three-way shaped pipe fitting for an evaporator, the curved section of the tail pipe has a V-shaped, W-shaped, or hook-shaped structure, and the angle of the bend of the curved section, the first bend transition section, and the second bend transition section is 90°-150°.

[0010] In the aforementioned three-way shaped pipe fitting for an evaporator, the first pipe section, the straight pipe section, and the tail pipe section are made of copper pipe with a wall thickness of 1.0-2.5 mm. The outer wall surface of the first pipe section, the straight pipe section, and the tail pipe section is covered with a passivation protective layer that has undergone chemical passivation treatment, and the thickness of the passivation protective layer is 10-30 μm.

[0011] The outstanding advantages of this utility model compared to the prior art are:

[0012] This utility model has a simple structure and low cost. It adopts an irregular design to meet the specific fluid path distribution requirements, and through a continuous bending integrated structure and hydraulic forming method, it ensures that the tee irregular pipe fitting has good overall sealing performance and support strength. Attached image description:

[0013] Figure 1 This is an overall sectional view of the present invention.

[0014] In the diagram: 1. Head pipe section; 2. Straight pipe section; 3. Tail pipe section; 4. First bending transition section; 5. Second bending transition section; 6. Protrusion; 7. Side branch port; 8. Narrowing section. Detailed implementation method:

[0015] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 :

[0016] A three-way shaped pipe fitting for an evaporator includes a main body, which, from head to tail, comprises a first pipe section 1 (a linear pipe section with a port at the head), a straight pipe section 2 (a linear pipe section), and a tail pipe section 3 (a curved pipe section with a port at the tail). The first pipe section 1 and the straight pipe section 2 are connected by a first curved transition section 4, and the straight pipe section 2 is connected to the tail pipe section by a second curved transition section 5. The first pipe section 1, the straight pipe section 2, and the tail pipe section 3 are integrally formed by continuous bending of the pipe material. The side wall of the straight pipe section 2 is partially deformed outward by hydraulic pressure to form a protrusion 6. The end of the protrusion 6 is cut to form a side port 7 that communicates with the inner cavity of the straight pipe section 2.

[0017] This utility model has a simple structure and low cost. It adopts an irregular design to meet the specific fluid path distribution requirements, and through a continuous bending integrated structure and hydraulic forming method, it ensures that the tee irregular pipe fitting has good overall sealing performance and support strength.

[0018] Since the fluid flows in from the first port of the main pipe and out to the tail port and the side port 7, a constricted section 8, whose diameter gradually narrows inward and upward towards the tail pipe 3, is provided on the straight pipe section 2 located between the protrusion 6 and the second curved transition section 5 to optimize the fluid flow velocity at the three ports. Furthermore, in this embodiment, to ensure that the fluid flow velocity is the same at the side port 7 and the tail port, the minimum diameter of the constricted section 8 is consistent with the diameter of the side port 7. Moreover, the length of the constricted section 8 is 1 / 5 to 1 / 3 of the total length of the straight pipe section 2, the cone angle of the constricted section 8 is 10° to 25°, and the transition between the constricted section 8 and the inner wall surface of the straight pipe section 2 is smooth and without sharp edges.

[0019] Furthermore, in order to effectively avoid the distribution of other pipe fittings in the evaporator and to have strong support strength, the curved pipe section of the tail pipe 3 has a V-shaped, W-shaped or hook-shaped structure, and the bending angle of the curved pipe section, the first bending transition section 4 and the second bending transition section 5 is 90°-150°.

[0020] Furthermore, the first pipe section 1, the straight pipe section 2, and the tail pipe section 3 are made of copper tubing with a wall thickness of 1.0-2.5 mm. To improve the corrosion resistance of the fittings, the outer walls of the first pipe section 1, the straight pipe section 2, and the tail pipe section 3 are covered with a passivation protective layer that has undergone chemical passivation treatment. The thickness of this passivation protective layer is 10-30 μm. The passivation protective layer can be formed by spraying an acidic passivation solution containing benzotriazole to induce a passivation reaction.

[0021] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A three-way shaped pipe fitting for an evaporator, characterized in that: The main body includes a main pipe, which from head to tail includes a first pipe section (1) with a port at the head and a linear pipe section, a straight pipe section (2) with a linear pipe section, and a tail pipe section (3) with a port at the tail and a curved pipe section. The first pipe section (1) and the straight pipe section (2) are connected by a first curved transition section (4), and the straight pipe section (2) and the tail pipe section are connected by a second curved transition section (5). The first pipe section (1), the straight pipe section (2) and the tail pipe section (3) are an integral structure formed by continuous bending of the pipe. The side wall of the straight pipe section (2) is locally deformed outward by hydraulic pressure to form a protrusion (6). The end of the protrusion (6) is cut to form a side branch port (7) that communicates with the inner cavity of the straight pipe section (2).

2. A tee fitting for an evaporator according to claim 1, characterized in that: The straight section (2) located between the protrusion (6) and the second bending transition section (5) has a constricted section (8) whose diameter gradually narrows inward and upward toward the tail section (3).

3. A tee fitting for an evaporator according to claim 2, characterized in that: The minimum diameter of the constricted section (8) is consistent with the diameter of the side branch port (7).

4. A tee fitting for an evaporator according to claim 2, characterized in that: The length of the constricted section (8) is 1 / 5 to 1 / 3 of the total length of the straight pipe section (2), the cone angle of the constricted section (8) is 10° to 25°, and the constricted section (8) and the inner wall surface of the straight pipe section (2) have a smooth transition without sharp edges.

5. A tee fitting for an evaporator according to claim 1, characterized in that: The curved section of the tailpipe (3) has a V-shaped, W-shaped or hook-shaped structure, and the bending angle of the curved section, the first bending transition section (4) and the second bending transition section (5) is 90°-150°.

6. A tee fitting for an evaporator according to claim 1, characterized in that: The first tube section (1), the straight tube section (2) and the tail tube section (3) are made of copper tubes with a wall thickness of 1.0mm-2.5mm. The outer wall surfaces of the first tube section (1), the straight tube section (2) and the tail tube section (3) are covered with a passivation protective layer that has been chemically passivated, and the thickness of the passivation protective layer is 10μm-30μm.

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