Air conditioner pipe fitting

Abstract

The utility model discloses an air conditioner pipe fitting which comprises a stainless steel main pipe and copper connecting sleeves, the stainless steel main pipe is provided with through holes in one-to-one correspondence with the copper connecting sleeves, one ends of the copper connecting sleeves are welded in the through holes in an inserted mode, and copper branch pipes are welded to the other ends of the copper connecting sleeves in an inserted mode. The copper connecting sleeves are inserted into the stainless steel main pipe, the stainless steel main pipe and the copper connecting sleeves are placed into a welding furnace to be brazed, the copper connecting sleeves are fixed to the stainless steel main pipe, then the copper branch pipes are inserted into the corresponding copper connecting sleeves, and due to the fact that the copper branch pipes and the copper connecting sleeves are made of copper, the copper branch pipes and the copper connecting sleeves can be welded at a low welding temperature. The copper branch pipe is welded and fixed on the copper connecting sleeve through the welding flux, and the structural strength of the copper branch pipe cannot be reduced due to overhigh welding temperature, so that the service life and the use reliability of the product are ensured.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning accessories technology, and in particular to an air conditioning pipe fitting. Background Technology

[0002] In existing air conditioning ductwork, due to the high price of copper, the use of stainless steel ductwork to replace copper ductwork is gradually becoming a trend. However, branch pipes of the ductwork generally still need to be connected using copper ductwork.

[0003] The process involves first drilling holes in the stainless steel main pipe, then inserting the required copper branch pipes. The stainless steel main pipe and copper branch pipes are then brazed together in a welding furnace. However, due to the inherent properties of stainless steel and copper, the welding temperature must be maintained above 1000 degrees Celsius to firmly bond them together. High-temperature welding of the copper branch pipe can easily lead to an increase in the overall grain size of the copper branch pipe, severely affecting its structural strength and resistance to deformation. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an air conditioning pipe fitting.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An air conditioning pipe fitting includes a stainless steel main pipe and a copper fitting. The stainless steel main pipe has through holes that correspond one-to-one with the copper fittings. One end of the copper fitting is inserted and welded into the through hole, and a copper branch pipe is inserted and welded to the other end of the copper fitting.

[0007] Preferably, the stainless steel main pipe is provided with a welding plane corresponding to the position of the copper sleeve, and the copper sleeve is provided with a protruding ring extending outward and abutting against the welding plane.

[0008] Preferably, the lower end face of the convex ring is provided with a convex ridge that abuts against the welding plane, and a gap is formed between the convex ridges.

[0009] Preferably, the protrusions are distributed radially outward from the copper sleeve as the center.

[0010] Preferably, the copper sleeve is provided with a plug end that is inserted into the through hole, and the outer periphery of the plug end is provided with two protrusions that abut against the side wall of the through hole, and a gap is formed between the two protrusions.

[0011] Preferably, the two protruding ribs are distributed circumferentially on the outer periphery of the plug end and are arranged vertically.

[0012] The beneficial effects of this utility model are:

[0013] 1. By inserting a copper sleeve into the stainless steel main pipe, the stainless steel main pipe and the copper sleeve are first placed in a welding furnace for brazing to fix the copper sleeve onto the stainless steel main pipe. Then, the copper branch pipe is inserted into the corresponding copper sleeve. Since both the copper branch pipe and the copper sleeve are made of copper, a lower welding temperature can be used to fix the copper branch pipe onto the copper sleeve by welding with solder. This prevents the copper branch pipe from reducing its structural strength due to excessively high welding temperatures, thereby ensuring the product's service life and reliability.

[0014] 2. Two protrusions are provided on the copper sleeve. These protrusions form gaps one and two, respectively, which allow the brazing filler to penetrate and be absorbed. By setting gaps one and two, the brazing filler between the copper sleeve and the stainless steel main pipe is prevented from leaking, allowing the brazing filler to better contact and weld the copper sleeve and the stainless steel main pipe, thus ensuring the firmness of the copper sleeve welded to the stainless steel main pipe. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0019] Figure 5 This is a schematic diagram of the structure of the copper bushing of this utility model.

[0020] In the diagram: stainless steel main pipe 1, through hole 11, welding plane 12, copper sleeve 2, convex ring 21, convex rib one 211, gap one 212, plug end 22, convex rib two 221, gap two 222, copper branch pipe 3. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0022] In the description of this specification, the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] like Figures 1-5As shown, an air conditioning pipe fitting includes a stainless steel main pipe 1 and a copper fitting 2. The stainless steel main pipe 1 has through holes 11 that correspond one-to-one with the copper fittings 2. The through holes 11 are distributed on the side wall of the stainless steel main pipe 1 and are arranged through each other. One end of the copper fitting 2 is inserted and welded into the through hole 11. The stainless steel main pipe 1 and the copper fitting 2 are brazed in a welding furnace so that the copper fitting 2 is fixed to the stainless steel main pipe 1 by brazing material.

[0024] Furthermore, in order to improve the weld strength between the copper sleeve 2 and the stainless steel main pipe 1, a welding plane 12 corresponding to the position of the copper sleeve 2 is provided on the stainless steel main pipe 1. The welding plane 12 is formed by flattening the corresponding positions of the stainless steel main pipe 1 and the copper sleeve 2. The copper sleeve 2 is provided with a protruding ring 21 that extends outward and abuts against the welding plane 12. The lower end face of the welding plane 12 and the protruding ring 21 are in close contact with each other. That is, the setting of the welding plane 12 can better fit with the copper sleeve 2, so that the brazing filler can better penetrate and weld the copper sleeve 2 and the stainless steel main pipe 1.

[0025] Furthermore, the lower end face of the convex ring 21 is provided with a convex rib 211 that abuts against the welding plane 12. The convex rib 211 is distributed radially outward from the copper sleeve 2 as the center. The end face of the convex rib 211 is in contact with the lower end face of the convex ring 21, and a gap 212 is formed between the convex ribs 211. By setting the gap 212, the brazing material can better penetrate from the outside to the inside into the welding plane 12 between the convex ring 21 and the stainless steel main pipe 1 through the gap 212.

[0026] Furthermore, the copper sleeve 2 is provided with a plug end 22 that is inserted into the through hole 11. The outer periphery of the plug end 22 is provided with a second protrusion 221 that abuts against the side wall of the through hole 11. The end face of the second protrusion 221 is in contact with the side wall of the through hole 11. The second protrusion 221 is circumferentially distributed on the outer periphery of the plug end 22 and is distributed vertically. A second gap 222 is formed between the connected second protrusions 221. Through the setting of the second gap 222, the brazing material can better penetrate from bottom to top into the space between the plug end 22 and the stainless steel main pipe 1 through the second gap 222.

[0027] Furthermore, by setting gap one 212 and gap two 222, the brazing material can quickly penetrate between the copper sleeve 2 and the stainless steel main pipe 1 and be absorbed in gap one 212 and gap two 222, making it difficult to leak out. This allows the brazing material to better contact and weld the copper sleeve 2 and the stainless steel main pipe 1, thus preventing the brazing material from leaking between the copper sleeve 2 and the stainless steel main pipe 1 and affecting the strength of the weld. This ensures the firmness of the copper sleeve 2 welded to the stainless steel main pipe 1, thereby improving the overall structural strength of the product.

[0028] A copper branch pipe 3 is inserted and welded to the other end of the copper sleeve 2. One end of the copper branch pipe 3 is inserted into the copper sleeve 2. Since both the copper branch pipe 3 and the copper sleeve 2 are made of copper, the copper branch pipe 3 can be fixed to the copper sleeve 2 by welding with solder using a relatively low welding temperature (generally, a flame welding torch with a temperature of 700 to 900 degrees Celsius is used to weld the copper sleeve 2 and the copper branch pipe 3 together with solder). Furthermore, because the welding temperature between copper pieces is relatively low, the copper branch pipe 3 will not have its structural strength reduced due to excessively high welding temperatures. This ensures that the copper branch pipe 3 in this embodiment has good structural strength and resistance to deformation, thereby guaranteeing the product's service life and reliability.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air conditioning pipe fitting, characterized in that: It includes a stainless steel main pipe (1) and a copper sleeve (2). The stainless steel main pipe (1) has through holes (11) that correspond one-to-one with the copper sleeve (2). One end of the copper sleeve (2) is inserted and welded into the through hole (11), and a copper branch pipe (3) is inserted and welded to the other end of the copper sleeve (2).

2. An air conditioning pipe fitting as described in claim 1, characterized in that: The stainless steel main pipe (1) is provided with a welding plane (12) corresponding to the position of the copper sleeve (2), and the copper sleeve (2) is provided with a protruding ring (21) extending outward and abutting against the welding plane (12).

3. An air conditioning pipe fitting as described in claim 2, characterized in that: The lower end face of the convex ring (21) is provided with a convex rib (211) that abuts against the welding plane (12), and a gap (212) is formed between the convex ribs (211).

4. An air conditioning pipe fitting as described in claim 3, characterized in that: The convex rib (211) is distributed radially outward from the copper sleeve (2) as the center.

5. An air conditioning pipe fitting as described in claim 1, characterized in that: The copper sleeve (2) is provided with a plug end (22) that is inserted into the through hole (11). The outer periphery of the plug end (22) is provided with a second protrusion (221) that abuts against the side wall of the through hole (11). A second gap (222) is formed between the second protrusion (221).

6. An air conditioning pipe fitting as described in claim 5, characterized in that: The two protruding ribs (221) are circumferentially distributed on the outer periphery of the plug end (22) and are distributed vertically.

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