Heat exchangers and air conditioners

Abstract

The utility model discloses a heat exchanger and air conditioner, the heat exchanger includes: the baffle and with the heat exchange pipe of baffle connection, the baffle has a plurality of openings of interval distribution, the heat exchange pipe is worn in the opening and extends to the outside of the opening, the baffle has the contact area with the heat exchange pipe and the non - contact area not with the heat exchange pipe contact, the surface of contact area is provided with the sacrificial layer, the baffle surface of heat exchanger embodiment is provided with the sacrificial layer, when with the corrosive medium contact, the sacrificial layer can be preferentially corroded to the purpose of protecting the heat exchange pipe is realized.

Description

Technical Field

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

[0002] Aluminum tube heat exchangers are widely used due to their advantages of high heat exchange efficiency, light weight, and low cost. However, aluminum tube heat exchangers are exposed to outdoor environments for extended periods. Because of the diversity and harshness of these environments, high surface corrosion resistance is required. Aluminum tube heat exchangers in air conditioner outdoor units typically use aluminum tubes (e.g., aluminum "U"-shaped tubes, also called long U-tubes) connected to aluminum edge plates. The contact area between the aluminum tube and the edge plate is a stress concentration point and susceptible to corrosion from air and moisture, making it a weak point in corrosion prevention. This can easily lead to leaks in the heat exchanger pipes due to corrosion, affecting the normal operation and service life of the air conditioner. Therefore, it is crucial to improve the corrosion resistance of the contact area between the aluminum tube and the edge plate. 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 a heat exchanger and an air conditioner including the heat exchanger. The side plate surface of the heat exchanger is provided with a sacrificial layer. When in contact with a corrosive medium, the sacrificial layer can be preferentially corroded, thereby achieving the purpose of protecting the heat exchange tube.

[0005] This utility model provides a heat exchanger, which includes: a side plate and heat exchange tubes connected to the side plate; the side plate has a plurality of openings spaced apart; the heat exchange tubes pass through the openings and extend beyond the openings;

[0006] The side plate has a contact area that contacts the heat exchange tube and a non-contact area that does not contact the heat exchange tube, and a sacrificial layer is provided on the surface of the contact area.

[0007] In some embodiments of this utility model, the heat exchange tube includes two straight sections and a bent section connecting the two straight sections, the straight sections passing through the opening and extending beyond the opening.

[0008] In some embodiments of this utility model, the distance between the bent portion (22) and the side plate is H, and the outer diameter of the heat exchange tube is D, wherein 1.5D≤H≤3D.

[0009] In some embodiments of this invention, the thickness of the sacrificial layer located in the contact area is ≥80μm.

[0010] In some embodiments of this invention, the sacrificial layer may extend to the surface of the non-contact area.

[0011] In some embodiments of this invention, the entire surface of the side plate can be covered by the sacrificial layer.

[0012] In some embodiments of this invention, the thickness of the sacrificial layer located in the non-contact area can be ≥80μm.

[0013] In some embodiments of this utility model, the side plate can be an aluminum plate, and the heat exchange tube can be an aluminum tube.

[0014] In some embodiments of this utility model, the sacrificial layer may be a zinc plating layer, a zinc diffusion layer, or a zinc spraying layer.

[0015] This utility model embodiment also provides an air conditioner, which includes the heat exchanger described above.

[0016] The heat exchanger of this embodiment achieves a sacrificial anode effect by providing a sacrificial layer on the contact area surface of the side plate that is more easily corroded by the corrosive medium. Therefore, when in contact with the corrosive medium, the sacrificial layer can be preferentially corroded, thereby extending the corrosion time of the heat exchange tube and thus achieving the purpose of extending the service life of the heat exchange tube.

[0017] 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

[0018] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0019] Figure 1 This is a three-dimensional structural diagram of a heat exchanger, which is an exemplary embodiment of the present invention.

[0020] Figure 2 for Figure 1 The enlarged view of the heat exchanger at point A is shown.

[0021] Figure 3 for Figure 1 A schematic cross-sectional view of the heat exchanger shown.

[0022] Figure 4 for Figure 3 A magnified view of the area at point D;

[0023] Figure 5This is a partial cross-sectional structural diagram of a heat exchanger, which is an exemplary embodiment of the present invention.

[0024] Figure 6 This is a partial cross-sectional structural diagram of another heat exchanger according to an exemplary embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the corrosion prevention process of a heat exchanger, which is an exemplary embodiment of this utility model.

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

[0027] 1-Corrosive medium; 2-Corrosion inlet; 10-Side plate; 11-Opening; 12-Contact area; 13-Non-contact area; 20-Heat exchange tube; 21-Straight section; 22-Bend section; 30-Sacrificial 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] This utility model embodiment provides a heat exchanger 100. Figure 1 This is a three-dimensional structural diagram of a heat exchanger, which is an exemplary embodiment of the present invention. Figure 2 for Figure 1 The enlarged view of the heat exchanger at point A is shown. Figure 3 for Figure 1 A schematic cross-sectional view of the heat exchanger shown. Figure 4 for Figure 3 A magnified view of the area at point D; Figure 5 This is a partial cross-sectional structural diagram of a heat exchanger, which is an exemplary embodiment of the present invention. Figure 6 This is a partial cross-sectional structural diagram of another heat exchanger according to an exemplary embodiment of the present invention.

[0030] like Figures 1 to 6 As shown, the heat exchanger 100 includes: a side plate 10 and a heat exchange tube 20; the side plate 10 is connected to the heat exchange tube 20;

[0031] The side plate 10 has a plurality of openings 11 spaced apart; the heat exchange tube 20 passes through the openings 11 and extends beyond the openings 11;

[0032] The side plate 10 also has a contact area 12 that contacts the heat exchange tube 20 and a non-contact area 13 that does not contact the heat exchange tube 20. A sacrificial layer 30 is provided on the surface of the contact area 12.

[0033] The heat exchanger 100 of this embodiment of the invention forms a sacrificial anode effect by providing a sacrificial layer 30, which is more easily corroded by the corrosive medium, on the surface of the contact area 12 of the side plate 10. Therefore, when in contact with the corrosive medium, the sacrificial layer 30 can be preferentially corroded, thereby extending the corrosion time of the heat exchange tube 20 and thus achieving the purpose of extending the service life of the heat exchange tube 20.

[0034] like Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the heat exchange tube 20 may include two straight sections 21 and a bent section 22 connected between the two straight sections 21. The straight sections 21 pass through the opening 11 and extend beyond the opening 11.

[0035] like Figure 5 and Figure 6 As shown, in some embodiments of this utility model, the distance between the bent portion 22 and the side plate 10 can be H, and the outer diameter of the heat exchange tube 20 is D, wherein 1.5D≤H≤3D.

[0036] For example, H can be 1.5D, 1.6D, 1.7D, 1.8D, 1.9D, 2D, 2.1D, 2.2D, 2.3D, 2.4D, 2.5D, 2.6D, 2.7D, 2.8D, 2.9D, or 3D.

[0037] When H and D satisfy 1.5D≤H≤3D, it can be ensured that the bending deformation area (i.e., the bend 22) of the heat exchange tube 20 (e.g., a long U-tube) and the side plate 10 maintain an appropriate distance, thus preventing the accumulation of corrosive media on the side plate 10 and corroding the bending deformation area of ​​the heat exchange tube 20 (the material in the deformation area has undergone tensile deformation, resulting in a decrease in material properties and making it a weak point for corrosion).

[0038] In some embodiments of this utility model, the thickness of the sacrificial layer 30 located in the contact area 12 can be in the range of ≥80μm. For example, the thickness of the sacrificial layer 30 located in the contact area 12 can be in the range of 80μm to 150μm, or in the range of 150μm to 300μm; or, for example, the thickness of the sacrificial layer 30 located in the contact area 12 can be 80μm, 90μm, 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, 160μm, 170μm, 180μm, 190μm, 200μm, 210μm, 220μm, 230μm, 240μm, 250μm, 260μm, 270μm, 280μm, 290μm or 300μm.

[0039] When the thickness of the sacrificial layer 30 in the contact area 12 is in the range of ≥80μm, the sacrificial layer 30 can withstand corrosion for a longer period of time, thereby providing longer protection for the heat exchange tube 20; moreover, the sacrificial layer 30 in this thickness range is easier to form.

[0040] like Figure 6 As shown, in some embodiments of the present invention, the sacrificial layer 30 may extend to the surface of the non-contact area 13.

[0041] like Figure 6 As shown, in some embodiments of this utility model, the entire surface of the side plate 10 can be uniformly covered by the sacrificial layer 30.

[0042] In some embodiments of this utility model, the thickness of the sacrificial layer 30 located in the non-contact area 13 can be in the range of ≥80μm. For example, the thickness of the sacrificial layer 30 located in the non-contact area 13 can be in the range of 80μm to 150μm, or in the range of 150μm to 300μm; or, for example, the thickness of the sacrificial layer 30 located in the non-contact area 13 can be 80μm, 90μm, 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, 160μm, 170μm, 180μm, 190μm, 200μm, 210μm, 220μm, 230μm, 240μm, 250μm, 260μm, 270μm, 280μm, 290μm or 300μm.

[0043] In some embodiments of this utility model, the thickness of the sacrificial layer 30 located in the non-contact area 13 and the sacrificial layer 30 located in the contact area 12 may be the same or different.

[0044] like Figure 6 As shown, in some embodiments of this utility model, the sacrificial layer 30 located in the non-contact area 13 and the sacrificial layer 30 located in the contact area 12 can be an integral structure. For example, the sacrificial layer 30 located in the non-contact area 13 and the sacrificial layer 30 located in the contact area 12 can be formed simultaneously using the same process. In this case, the sacrificial layer 30 located in the non-contact area 13 and the sacrificial layer 30 located in the contact area 12 share the same film layer, and they are an integral structure.

[0045] In some embodiments of this utility model, the side plate 10 can be an aluminum plate, and the heat exchange tube 20 can be an aluminum tube. For example, the heat exchanger 100 can be an aluminum heat exchanger, the side plate 10 can be an aluminum side plate of the aluminum heat exchanger, and the heat exchange tube 20 can be an aluminum "U" shaped tube of the aluminum heat exchanger.

[0046] In some embodiments of this invention, the material of the sacrificial layer 30 can be a commonly used zinc-based sacrificial anode material, magnesium-based sacrificial anode material, or aluminum-based alloy sacrificial anode material. For example, the sacrificial layer 30 can be a zinc-plated layer, a zinc-diffused layer, or a zinc-sprayed layer formed from a zinc-based sacrificial anode material.

[0047] like Figures 1 to 6 As shown, heat exchanger 100, such as an aluminum heat exchanger, may include an aluminum plate and a plurality of aluminum tubes connected to the aluminum plate; wherein the aluminum plate serves as a side plate 10 of heat exchanger 100 and the aluminum tubes serve as heat exchange tubes 20 of heat exchanger 100.

[0048] The side plate 10 has a plurality of openings 11 spaced apart; the heat exchange tube 20 includes two straight sections 21 and a bent section 22 connected between the two straight sections 21. The straight sections 21 pass through the openings 11 and extend beyond the openings 11, and the bent section 22 bends toward the side plate 10.

[0049] The side plate 10 has a contact area 12 that contacts the heat exchange tube 20 and a non-contact area 13 that does not contact the heat exchange tube 20; a sacrificial layer 30 is provided on the surface of the contact area 12; the thickness of the sacrificial layer 30 located in the contact area 12 can be in the range of ≥80μm, for example, in the range of 80μm to 150μm or 150μm to 300μm.

[0050] In such Figure 5 In the heat exchanger 100 shown, the sacrificial layer 30 is located only on the inner wall of the opening 11.

[0051] In such Figure 6 In the heat exchanger 100 shown, a sacrificial layer 30 is provided on the surface of the contact area 12, and the sacrificial layer 30 can extend to the surface of the non-contact area 13. For example, the entire surface of the side plate 10 can be covered by the sacrificial layer 30. The thickness of the sacrificial layer 30 in the contact area 12 can be in the range of ≥80μm, for example, in the range of 80μm to 150μm or 150μm to 300μm. The thickness of the sacrificial layer in the non-contact area can be in the range of ≥80μm, for example, in the range of 80μm to 150μm or 150μm to 300μm.

[0052] In some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the contact area 12 of the heat exchange tube 20 includes the inner wall of the opening 11.

[0053] In such Figure 5 He Ru Figure 6In the heat exchanger shown, the distance between the bend 22 and the side plate 10 is H, and the outer diameter of the heat exchange tube 20 is D, where 1.5D ≤ H ≤ 3D. For example, H can be 1.5D, 1.6D, 1.7D, 1.8D, 1.9D, 2D, 2.1D, 2.2D, 2.3D, 2.4D, 2.5D, 2.6D, 2.7D, 2.8D, 2.9D, or 3D.

[0054] Figure 7 This is a schematic diagram illustrating the corrosion prevention process of a heat exchanger, which is an exemplary embodiment of this utility model. Figure 7 As shown:

[0055] The corrosion prevention reaction mechanism of the heat exchanger in the exemplary embodiment of this utility model is as follows:

[0056] Step 1: ZnO + 2Cl - → ZnCl2+O 2- ;

[0057] Step 2: 2Zn + O2 → 2ZnO; ZnO + H2O → Zn(OH)2;

[0058] Step 3: CO2 + ZnO → ZnCO3.

[0059] The sacrificial layer 30 comes into contact with the corrosive medium 1, and the surface of the sacrificial layer is corroded to form a corrosion inlet 2. Then the corrosion develops along the sacrificial layer 30, thereby delaying the corrosion of the heat exchange tube 20.

[0060] This utility model embodiment also provides a heat exchange device, which includes the heat exchanger described above.

[0061] In some embodiments of this utility model, the heat exchange device can be an air conditioner. The air conditioner can be a window air conditioner, a split air conditioner, or a portable air conditioner.

[0062] 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.

[0063] 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, or they 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.

[0064] 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 heat exchanger (100), characterized in that, include: Side plate (10) and heat exchange tube (20) connected to the side plate (10); the side plate (10) has a plurality of openings (11) spaced apart; the heat exchange tube (20) passes through the openings (11) and extends beyond the openings (11); The side plate (10) has a contact area (12) that contacts the heat exchange tube (20) and a non-contact area (13) that does not contact the heat exchange tube (20). A sacrificial layer (30) is provided on the surface of the contact area (12).

2. The heat exchanger (100) according to claim 1, characterized in that, The heat exchange tube (20) includes a straight section (21) and a bent section (22) connecting two adjacent straight sections (21), the straight section (21) passing through the opening (11) and extending beyond the opening (11).

3. The heat exchanger (100) according to claim 2, characterized in that, The distance between the bent portion (22) and the side plate (10) is H, and the outer diameter of the heat exchange tube (20) is D, wherein 1.5D≤H≤3D.

4. The heat exchanger (100) according to claim 1, characterized in that, The thickness of the sacrificial layer (30) located in the contact area (12) is ≥80μm.

5. The heat exchanger (100) according to claim 1, characterized in that, The sacrificial layer (30) extends to the surface of the non-contact area (13).

6. The heat exchanger (100) according to claim 5, characterized in that, The entire surface of the side plate (10) is covered by the sacrificial layer (30).

7. The heat exchanger (100) according to claim 6, characterized in that, The thickness of the sacrificial layer (30) located in the non-contact area (13) is ≥80μm.

8. The heat exchanger (100) according to any one of claims 1 to 7, characterized in that, The side plate (10) is an aluminum plate, and the heat exchange tube (20) is an aluminum tube.

9. The heat exchanger (100) according to claim 8, characterized in that, The sacrificial layer (30) is a zinc-plated layer, a zinc-diffused layer, or a zinc-sprayed layer.

10. An air conditioner, characterized in that, Includes a heat exchanger (100) according to any one of claims 1 to 9.

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