Aluminum pipe welded tube, heat exchanger and air conditioner

Abstract

This utility model discloses an aluminum tube welded pipe, a heat exchanger, and an air conditioner. The aluminum tube welded pipe includes: a first aluminum tube and a second aluminum tube welded to the first aluminum tube; the first aluminum tube includes a zinc-impregnated layer; a solder is present between the zinc-impregnated layer and the second aluminum tube; an anti-corrosion protective layer is provided on the outer surface of the solder, extending from the outer surface of the solder to the outer surface of the zinc-impregnated layer. The aluminum tube welded pipe of this utility model has good anti-corrosion effect, effectively preventing heat exchanger pipe leakage due to corrosion, damage to the temperature sensing sleeve due to corrosion, and failure of the temperature sensing bulb.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and more specifically, to an aluminum tube welded tube, a heat exchanger, and an air conditioner. Background Technology

[0002] Aluminum tube heat exchangers are typically connected by welding aluminum semi-circular tubes and aluminum temperature-sensing sleeves. However, the welded surfaces of the temperature-sensing sleeve and semi-circular tubes are susceptible to corrosion from air and moisture, leading to corrosion and leaks in the heat exchanger pipes, corrosion damage to the temperature-sensing sleeve, and even failure of the temperature-sensing bulb. Furthermore, corrosive media can easily form on the surface of the welded heat exchanger pipes. These media can penetrate the gap between the weld and the zinc-diffused layer of the semi-circular tube, causing corrosion to continuously develop along the zinc-diffused layer, eventually leading to perforation and the detachment of the temperature-sensing sleeve. Utility Model Content

[0003] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of protection of this utility model.

[0004] This utility model provides an aluminum tube welded pipe, a heat exchanger including the aluminum tube welded pipe, and an air conditioner including the heat exchanger. The aluminum tube welded pipe has good anti-corrosion effect and can effectively prevent the heat exchanger pipe from leaking due to corrosion, the temperature sensing sleeve from being damaged due to corrosion, and the temperature sensing bulb from failing.

[0005] This utility model provides an aluminum tube welded tube, which includes: a first aluminum tube and a second aluminum tube welded to the first aluminum tube; the first aluminum tube includes a zinc-impregnated layer; there is a solder between the zinc-impregnated layer and the second aluminum tube; an anti-corrosion protective layer is provided on the outer surface of the solder, and the anti-corrosion protective layer extends from the outer surface of the solder to the outer surface of the zinc-impregnated layer.

[0006] In some embodiments of this utility model, the zinc-impregnated layer has a first outer surface and a second outer surface, the first outer surface being configured to receive corrosive media; the entire first outer surface is covered by the anti-corrosion protective layer.

[0007] In some embodiments of this utility model, the outer surface of the zinc-impregnated layer is covered by the anti-corrosion protective layer.

[0008] In some embodiments of this invention, the anti-corrosion protective layer extends from the outer surface of the solder to at least a portion of the second aluminum tube.

[0009] In some embodiments of this utility model, the anti-corrosion protective layer extends ≥5mm on the second aluminum tube, measured from the edge of the outer surface of the solder near the second aluminum tube.

[0010] In some embodiments of this utility model, the outer surface of the second aluminum tube is covered by the anti-corrosion protective layer.

[0011] In some embodiments of this utility model, the average outer diameter of the first aluminum tube is 4mm to 30mm, and the average outer diameter of the second aluminum tube is 4mm to 15mm.

[0012] In some embodiments of this utility model, the cross-sectional shape of the first aluminum tube on a section perpendicular to its extension direction is circular, elliptical, rectangular or irregular.

[0013] The cross-sectional shape of the second aluminum tube perpendicular to its extension direction is circular, elliptical, rectangular or irregular.

[0014] In some embodiments of this utility model, the first aluminum tube is an aluminum "U"-shaped tube; the second aluminum tube is an aluminum temperature-sensing sleeve, and a temperature-sensing bulb is provided in the aluminum temperature-sensing sleeve.

[0015] This utility model embodiment also provides a heat exchanger, which includes the aluminum tube welded tube as described above.

[0016] This utility model embodiment also provides an air conditioner, which includes the heat exchanger described above.

[0017] The aluminum tube welded pipe of this utility model is formed by first welding a first aluminum tube and a second aluminum tube together, and then performing anti-corrosion treatment on the welded first aluminum tube and the second aluminum tube as a whole. It can isolate the working environment of the aluminum tube welded pipe from air, moisture and other corrosive media, effectively preventing corrosive media on the surface of the heat exchanger pipe from entering the gap between the solder and the zinc-impregnated layer of the semi-circular tube, and preventing corrosion from continuously developing along the zinc-impregnated layer until perforation. This avoids heat exchanger pipe leakage due to corrosion, temperature sensing sleeve falling off due to corrosion and temperature sensing bulb failure.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0020] Figure 1 This is a schematic diagram of the corrosion process of the current semi-circular tube and temperature sensing sleeve after welding.

[0021] Figure 2 A cross-sectional structural diagram of an aluminum tube welded pipe, which is an exemplary embodiment of this utility model;

[0022] Figure 3 This is a cross-sectional structural diagram of another aluminum tube welded tube, which is an exemplary embodiment of the present invention.

[0023] Figure 4 A cross-sectional structural schematic diagram of another aluminum tube welded tube as an exemplary embodiment of the present utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of a heat exchanger, which is an exemplary embodiment of the present invention.

[0025] Figure 6 This is a partially enlarged view of a heat exchanger as an exemplary embodiment of the present invention.

[0026] The meanings of the symbols in the attached diagram are as follows:

[0027] 1-Semicircular tube; 2-Temperature sensing sleeve; 3-Solder; 30-Anti-corrosion protective layer; 31-Third outer surface; 32-Fourth outer surface; 4-Corrosive medium; 10-First aluminum tube; 11-Zinc-diffused layer; 111-First outer surface; 112-Second outer surface; 20-Second aluminum tube; 30-Anti-corrosion protective layer; 100-Heat exchanger. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0029] Figure 1 This is a schematic diagram of the corrosion process of the current semi-circular tube and temperature sensing sleeve after welding.

[0030] like Figure 1 As shown, a zinc-impregnated layer 11 is provided on one side of the semicircular tube 1, and the zinc-impregnated layer 11 and the temperature-sensing sleeve 2 are welded together by solder 3. During the operation of the heat exchanger, corrosive media 4 such as air and water in the environment will come into contact with the semicircular tube 1, the temperature-sensing sleeve 2 and the solder 3, and the following corrosion process will occur:

[0031] (S1) First stage of corrosion: The zinc layer 11 on the surface of the semi-circular tube 1 is thinned due to corrosion, so that the local area of ​​the zinc layer 11 connected with the solder 3 is exposed to the corrosive medium.

[0032] (S2) Second stage of corrosion: The zinc layer 11 on the surface of the semi-circular tube 1 is further thinned, and corrosion begins to develop towards the zinc layer 11 connected to the solder 3.

[0033] (S3) Third stage of corrosion: Corrosive medium 4 enters the gap between solder 3 and zinc layer 11, and corrosion continues to develop along zinc layer 11 until perforation.

[0034] This utility model embodiment provides an aluminum tube welded pipe. Figure 2 This is a cross-sectional structural diagram of an aluminum tube welded pipe, which is an exemplary embodiment of the present invention.

[0035] like Figure 2 As shown, the aluminum tube welded tube of this utility model embodiment includes: a first aluminum tube 10 and a second aluminum tube 20, the first aluminum tube 10 and the second aluminum tube 20 are welded together; the first aluminum tube 10 includes a zinc-impregnated layer 11; there is a solder 3 between the second aluminum tube 20 and the zinc-impregnated layer 11; there is an anti-corrosion protective layer 30 on the outer surface of the solder 3, the anti-corrosion protective layer 30 extends from the outer surface of the solder 3 to the outer surface of the zinc-impregnated layer 11.

[0036] In the description of this utility model, the "outer surface" of a component or film layer refers to the exposed surface of the component after the first aluminum tube and the second aluminum tube are welded together by solder and before the anti-corrosion protective layer is formed. For example, the "outer surface of the solder" refers to the exposed surface of the solder after the first aluminum tube and the second aluminum tube are welded together by solder and before the anti-corrosion protective layer is formed.

[0037] The aluminum tube welded pipe of this utility model embodiment is formed by first welding a first aluminum tube and a second aluminum tube together, and then performing anti-corrosion treatment on the welded first aluminum tube and the second aluminum tube as a whole. It can isolate the air, moisture and other corrosive media in the working environment of the aluminum tube welded pipe, effectively preventing corrosive media on the surface of the heat exchanger pipe from entering the gap between the solder and the zinc-impregnated layer of the first aluminum tube, and preventing corrosion from continuously developing along the zinc-impregnated layer until perforation. This avoids heat exchanger pipe leakage due to corrosion, temperature sensing sleeve falling off due to corrosion and temperature sensing bulb failure.

[0038] Figure 3 This is a cross-sectional structural diagram of another aluminum tube welded tube, which is an exemplary embodiment of the present invention. Figure 4 This is a cross-sectional structural diagram of another aluminum tube welded tube, which is an exemplary embodiment of this utility model.

[0039] like Figure 3 and Figure 4 As shown, in some embodiments of this utility model, the zinc-impregnated layer 11 has opposing first outer surface 111 and second outer surface 112. Figure 3 In this configuration, the anti-corrosion protective layer 30 may be located only on the first outer surface 111 of the zinc-impregnated layer 11; for example, the anti-corrosion protective layer 30 may cover the entire first outer surface 111. Figure 3In this process, the anti-corrosion protective layer 30 can be located on the first outer surface 111 and the second outer surface 112 of the zinc-impregnated layer 11. For example, the anti-corrosion protective layer 30 can cover the entire first outer surface 111 and the entire second outer surface 112.

[0040] When a continuous outer surface is covered by the anti-corrosion protective layer 30, for example, Figure 3 and Figure 4 As shown, the entire first outer surface 111 of the zinc-impregnated layer 11 is covered by the anti-corrosion protective layer 30.

[0041] like Figure 4 As shown, the entire outer surface of the zinc-diffused layer can be covered by the anti-corrosion protective layer. When the entire outer surface of the zinc-diffused layer is covered by the anti-corrosion protective layer, contact between the zinc-diffused layer and the corrosive medium can be avoided, thus preventing the formation of gaps between the zinc-diffused layer and the anti-corrosion protective layer.

[0042] In some embodiments of this utility model, only a portion of the outer surface of the solder is covered by the anti-corrosion protective layer 30, or the entire outer surface of the solder is covered by the anti-corrosion protective layer 30.

[0043] like Figures 2 to 4 As shown, solder 3 has a third outer surface 31 and a fourth outer surface 32, wherein the third outer surface 31 can withstand corrosive media, while the fourth outer surface 32 cannot withstand corrosive media. For example, the third outer surface 31 can be... Figure 3 and Figure 4 The upper surface of the solder 3 shown, the fourth outer surface 32 can be Figure 3 and Figure 4 The lower end face of the solder 3 shown; the third outer surface 31, being located at the upper end of the solder 3, can be received by the corrosive medium when it falls onto the third outer surface 31, and will not quickly slide off the third outer surface 31; the fourth outer surface 32, being located at the lower end of the solder 3, will quickly slide off the fourth outer surface 32 due to gravity when it falls onto the fourth outer surface 32.

[0044] In some embodiments of this utility model, such as Figure 2 As shown, the anti-corrosion protective layer 30 may only cover the third outer surface 31 of the solder 3, but not the fourth outer surface 32.

[0045] like Figure 3 and Figure 4 As shown, the anti-corrosion protective layer 30 can cover the third outer surface 31 and the fourth outer surface 32 of the solder 3, that is, cover the entire outer surface of the solder 3.

[0046] like Figure 4 As shown, in some embodiments of this utility model, the anti-corrosion protective layer 30 can extend from the outer surface of the solder 3 to at least a portion of the second aluminum tube 20.

[0047] In some embodiments of this utility model, such as Figure 4 As shown, the extension distance d of the anti-corrosion protective layer 30 on the second aluminum tube 20, measured from the edge of the outer surface of the solder 3 near the second aluminum tube 20, can be within a range of not less than 5 mm.

[0048] In the description of this utility model, "the extension distance of the anti-corrosion protective layer" refers to the extension distance of the continuous anti-corrosion protective layer.

[0049] When the anti-corrosion protective layer extends over a distance of not less than 5 mm on the second aluminum tube, a good anti-corrosion effect can be achieved.

[0050] For example, the extension distance of the anti-corrosion protective layer on the second aluminum tube, measured from the edge of the outer surface of the solder near the second aluminum tube, can be 5mm, 10mm, 15mm, 20mm, 25mm or 30mm.

[0051] In some embodiments of this invention, the thickness of the anti-corrosion protective layer can be in the range of 45 μm to 300 μm. For example, the thickness of the anti-corrosion protective layer can be in the range of 80 μm to 150 μm. As another example, the thickness of the anti-corrosion protective layer can be 45 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, 200 μm, 210 μm, 220 μm, 230 μm, 240 μm, 250 μm, 260 μm, 270 μm, 280 μm, 290 μm, or 300 μm.

[0052] In some embodiments of this utility model, the anti-corrosion protective layer can be a mechanically galvanized layer, an electroplated zinc layer, or a coating layer.

[0053] In some embodiments of this utility model, the average outer diameter of the first aluminum tube can be in the range of 4mm to 30mm, and the average outer diameter of the second aluminum tube can be in the range of 4mm to 15mm.

[0054] In some embodiments of this utility model, the cross-sectional shape of the first aluminum tube on a section perpendicular to its extension direction is circular, elliptical, rectangular or irregular.

[0055] The cross-sectional shape of the second aluminum tube perpendicular to its extension direction is circular, elliptical, rectangular or irregular.

[0056] In some embodiments of this utility model, the first aluminum tube can be an aluminum "U"-shaped tube; the second aluminum tube can be an aluminum temperature-sensing sleeve, which is used to install a temperature-sensing bulb. For example, the temperature-sensing bulb can be fixed inside the aluminum temperature-sensing sleeve; the temperature-sensing bulb can be a temperature sensor.

[0057] This utility model embodiment also provides a corrosion prevention method, the corrosion prevention method comprising:

[0058] A first aluminum tube and a second aluminum tube are provided; the first aluminum tube includes a zinc-dipped layer.

[0059] The zinc-plated layers of the first aluminum tube and the second aluminum tube are welded together; after welding, there is solder between the first aluminum tube and the second aluminum tube, and the first aluminum tube and the second aluminum tube are connected together by the solder.

[0060] The first and second aluminum tubes after welding are subjected to anti-corrosion treatment, so that an anti-corrosion protective layer is formed on the outer surface of the solder and the anti-corrosion protective layer extends from the outer surface of the solder to the outer surface of the zinc-infiltrated layer.

[0061] The anti-corrosion method of this utility model is formed by first welding the first aluminum tube and the second aluminum tube together, and then performing anti-corrosion treatment on the welded first aluminum tube and the second aluminum tube as a whole. It can isolate the working environment of the aluminum tube welded tube from the air, moisture and other corrosive media, effectively preventing the corrosive media on the surface of the heat exchanger pipe from entering the gap between the solder and the zinc-impregnated layer of the semi-circular tube, and preventing corrosion from continuously developing along the zinc-impregnated layer until perforation. This avoids the heat exchanger pipe from leaking due to corrosion, the temperature sensing sleeve from falling off due to corrosion, and the temperature sensing bulb from failing.

[0062] This utility model embodiment also provides a heat exchanger 100. Figure 5 This is a three-dimensional structural diagram of a heat exchanger, which is an exemplary embodiment of the present invention. Figure 6 This is a partially enlarged view of a heat exchanger as an exemplary embodiment of the present invention.

[0063] like Figure 5 and Figure 6 As shown, the heat exchanger 100 includes the aluminum tube welded tube as described above.

[0064] In some embodiments of this utility model, the heat exchanger can be an aluminum tube heat exchanger.

[0065] exist Figure 6 In the heat exchanger shown, the cross-sectional shape of the first aluminum tube 10 on the section perpendicular to its extension direction is circular, that is, the first aluminum tube 10 is a round tube, the average outer diameter of the first aluminum tube 10 can be in the range of 4mm to 30mm, and the first aluminum tube 10 can be an aluminum "U" shaped tube.

[0066] The cross-sectional shape of the second aluminum tube 20 perpendicular to its extension direction is circular, that is, the second aluminum tube 20 is a round tube. The average outer diameter of the second aluminum tube 20 can be in the range of 4mm to 15mm. The second aluminum tube 20 can be an aluminum temperature sensing sleeve.

[0067] This utility model embodiment also provides an air conditioner, which includes the heat exchanger described above.

[0068] In the description of this utility model, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "'mouth' structure", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure referred to has a specific orientation, or is constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0069] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "connection," "direct connection," "indirect connection," "fixed connection," "installation," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. The terms "installation," "connection," and "fixed connection" can refer to a direct connection or an indirect connection through an intermediate medium, and can refer to the internal communication between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0070] Although the embodiments disclosed in this utility model are as described above, the content described is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this utility model, but the patent protection scope of this utility model shall still be defined by the appended claims.

Claims

1. A welded aluminum tube, characterized in that, include: A first aluminum tube and a second aluminum tube welded to the first aluminum tube; the first aluminum tube includes a zinc-diffused layer; there is solder between the zinc-diffused layer and the second aluminum tube; an anti-corrosion protective layer is provided on the outer surface of the solder, the anti-corrosion protective layer extending from the outer surface of the solder to the outer surface of the zinc-diffused layer.

2. The aluminum tube welded pipe according to claim 1, characterized in that, The zinc-impregnated layer has a first outer surface and a second outer surface, the first outer surface being configured to withstand corrosive media; the entire first outer surface is covered by the anti-corrosion protective layer.

3. The aluminum tube welded pipe according to claim 2, characterized in that, The outer surface of the zinc-impregnated layer is covered by the anti-corrosion protective layer.

4. The aluminum tube welded pipe according to claim 1, characterized in that, The anti-corrosion protective layer extends from the outer surface of the solder to at least a portion of the second aluminum tube.

5. The aluminum tube welded pipe according to claim 4, characterized in that, The anti-corrosion protective layer extends ≥5mm on the second aluminum tube from the edge of the outer surface of the solder near the second aluminum tube.

6. The aluminum tube welded pipe according to claim 4, characterized in that, The outer surface of the second aluminum tube is covered by the anti-corrosion protective layer.

7. The aluminum tube welded pipe according to any one of claims 1 to 6, characterized in that, The average outer diameter of the first aluminum tube is 4mm to 30mm, and the average outer diameter of the second aluminum tube is 4mm to 15mm.

8. The aluminum tube welded pipe according to any one of claims 1 to 6, characterized in that, The cross-sectional shape of the first aluminum tube in a section perpendicular to its extension direction is circular, elliptical, rectangular, or irregular. The cross-sectional shape of the second aluminum tube perpendicular to its extension direction is circular, elliptical, rectangular or irregular.

9. The aluminum tube welded pipe according to any one of claims 1 to 6, characterized in that, The first aluminum tube is an aluminum "U"-shaped tube; the second aluminum tube is an aluminum temperature-sensing sleeve, and a temperature-sensing bulb is provided in the aluminum temperature-sensing sleeve.

10. A heat exchanger, characterized in that, Includes aluminum tube welded tubes according to any one of claims 1 to 9.

11. An air conditioner, characterized in that, Includes the heat exchanger according to claim 10.

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