Heat exchanger and air conditioner

Abstract

The utility model provides a heat exchanger and an air conditioner, and relates to the technical field of household appliances. The heat exchanger comprises fins and end plates, the end plates are located at the ends of the fins, each end plate comprises a main plate body and a folded edge, and the folded edges are formed on the edges of the main plate bodies and extend in the direction away from the fins; the heat exchanger further comprises a first heat exchange pipe and a second heat exchange pipe, the first heat exchange pipe sequentially penetrates through the fins and the main plate body and then is fixedly welded to the second heat exchange pipe, and the welding portion of the first heat exchange pipe and the welding portion of the second heat exchange pipe are located on the side, away from the fins, of the main plate body. The distance between the edge of the end, away from the main plate body, of the folded edge and the main plate body is smaller than the distance between the welding part and the main plate body. According to the heat exchanger provided by the invention, when welding flames are adopted for welding the welding parts, the folded edges cannot shield the effect of the flames on the welding parts, the flames can enable the welding parts to be evenly heated, welding flux located on the welding parts can be fully melted so that the welding flux can permeate, the situation of welding missing is avoided, and the welding qualification rate is increased; and the connection stability of the second heat exchange tube is improved.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a heat exchanger and an air conditioner. Background Art

[0002] A heat exchanger is a device that realizes heat exchange between fluid media with different temperatures in a refrigeration system. It can use heat transfer and fluid circulation to complete the cooling and heating process, and is an important component of an air conditioner. A heat exchange tube is a heat transfer element made of metal, which has the advantages of excellent heat transfer performance, high heat flux density, and machinability. The heat exchange tube is usually connected to the expansion hole on the heat exchanger through a brazing process. In automatic welding, the port of the heat exchange tube comes with a ring solder. After the heat exchanger is inserted into the heat exchanger, the flame in the welding furnace shoots out horizontally to melt the solder for welding. In the related art, the welding position is prone to insufficient heating, resulting in insufficient solder penetration and leaking. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a heat exchanger and an air conditioner.

[0004] The technical solution adopted by this application to solve the above technical problems is:

[0005] In a first aspect, the present application provides a heat exchanger, the heat exchanger comprising a fin and an end plate, the end plate being located at the end of the fin, the end plate comprising a main plate body and a folded edge, the folded edge being formed at the edge of the main plate body and extending in a direction away from the fin;

[0006] The heat exchanger also includes a first heat exchange tube and a second heat exchange tube. The first heat exchange tube passes through the fins and the main board body in sequence and is welded and fixed to the second heat exchange tube. The welding part of the first heat exchange tube and the second heat exchange tube is located on the side of the main board body away from the fins, and the distance between the edge of the folded edge at one end away from the main board body and the main board body is smaller than the distance between the welding part and the main board body.

[0007] Optionally, in some embodiments of the present application, the end of the first heat exchange tube has an opening, the inner diameter of the opening is larger than the outer diameter of the connecting end of the second heat exchange tube, and the second heat exchange tube is inserted into the opening.

[0008] Optionally, in some embodiments of the present application, the opening is an expansion opening formed by an expansion treatment, and the inner diameter of the opening is larger than the inner diameter of the pipe section in the first heat exchange pipe connected to the opening.

[0009] Optionally, in some embodiments of the present application, a plurality of first flange holes are opened on the main board body, and the first heat exchange tube passes through the first flange holes and extends in a direction away from the fins.

[0010] Optionally, in some embodiments of the present application, the end plate further includes a first connecting portion, the first connecting portion is connected to the flanging and is located on the side of the main board body close to the fin, and the first connecting portion extends in the direction close to the fin.

[0011] Optionally, in some embodiments of the present application, the end plate includes a plurality of first connecting portions, and the plurality of first connecting portions are arranged at intervals and connected to the flanging.

[0012] Optionally, in some embodiments of the present application, there is a notch between the first connecting portion and the main board body, and the notch and the first connecting portion have the same size.

[0013] Optionally, in some embodiments of the present application, a first connecting hole is formed in the first connecting portion, and the orthographic projection of the main board body on the plane where the first connecting portion is located covers the center of the first connecting hole.

[0014] Optionally, in some embodiments of the present application, the heat exchanger is applicable to an outdoor unit, the outdoor unit includes a middle partition board, a second connecting portion is provided on the middle partition board, and the first connecting portion and the second connecting portion are connected.

[0015] In a second aspect, an embodiment of the present application further provides an air conditioner, and the air conditioner includes the above heat exchanger.

[0016] In summary, due to the adoption of the above technical solutions, the present application has at least the following beneficial effects:

[0017] For the heat exchanger provided by the present application, by setting the distance between the edge of the end of the flanging far from the main board body and the main board body to be less than the distance between the welding portion and the main board body, when welding the welding portion with a welding flame, the flanging will not block the action of the flame on the welding portion, and the flame can uniformly heat the welding portion, fully melt the solder located in the welding portion and make the solder fully penetrate, avoiding the situation of missed welding, improving the qualification rate of welding, and improving the connection stability of the second heat exchange tube. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application and do not limit the present application, where:

[0019] Figure 1 is a schematic structural diagram of a heat exchanger provided by an embodiment of the present application;

[0020] Figure 2 is Figure 1 an enlarged view of I in

[0021] Figure 3 is a schematic structural diagram of another perspective of the heat exchanger provided by an embodiment of the present application;

[0022] Figure 4 is Figure 3 an enlarged view of II in;

[0023] Figure 5 is a schematic structural view of the end plate provided by the embodiment of the present application;

[0024] Figure 6 is Figure 5 an enlarged view of III in;

[0025] Figure 7 is a schematic structural view of the end plate before bending provided by the embodiment of the present application;

[0026] Figure 8 is Figure 7 an enlarged view of IV in;

[0027] Figure 9 is a schematic partial structural view of the outdoor unit provided by the embodiment of the present application;

[0028] Figure 10 is Figure 9 an enlarged view of V in.

[0029] Explanation of reference numerals:

[0030] 100 - outdoor unit;

[0031] 10 - heat exchanger; 11 - fin; 12 - end plate; 121 - main board body; 1211 - first flanging hole; 122 - folded edge; 123 - first connecting portion; 1231 - first connecting hole; 13 - first heat exchange tube; 131 - opening; 14 - second heat exchange tube; 15 - welding portion; 16 - notch;

[0032] 20 - middle partition;

[0033] 30 - side plate. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0035] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These terms are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a unique orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0036] In the present application, the term "exemplary" is used to mean "serving as an example, illustration, or instance". Any embodiment described as exemplary in the present application is not necessarily to be construed as more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the present application. In the following description, details are set forth for purposes of explanation. It should be understood that those of ordinary skill in the art can recognize that the present application can be practiced without these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles disclosed in the present application.

[0037] For the convenience of understanding the solution of the present application, the spline curves and arrows used for the reference numerals in the drawings are described herein: For the components indicated by the spline curves without arrows, they are solid components, that is, components having a solid structure; for the components indicated by the spline curves with arrows, they are virtual components, that is, components without a solid structure.

[0038] In the related art, since the end plates of the heat exchanger need to be connected and fixed to other sheet metal parts such as middle partitions, side plates, chassis, etc., a relatively large number of connection holes are usually provided on the flanges of the end plates. The flanges of the end plates often block the flame of automatic welding, and the welding positions are not sufficiently heated, resulting in insufficient penetration of the solder and causing welding defects such as missed welding.

[0039] Please refer to Figure 1 and Figure 2, in a first aspect, an embodiment of the present application provides a heat exchanger 10. The heat exchanger 10 includes fins 11 and end plates 12. The end plates 12 are located at the ends of the fins 11. The end plates 12 include main plate bodies 121 and flanges 122. The flanges 122 are formed at the edges of the main plate bodies 121 and extend in a direction away from the fins 11. The heat exchanger 10 further includes a first heat exchange tube 13 and a second heat exchange tube 14. The first heat exchange tube 13 passes through the fins 11 and the main plate bodies 121 in sequence and is welded and fixed to the second heat exchange tube 14. The welding portion 15 of the first heat exchange tube 13 and the second heat exchange tube 14 is located on the side of the main plate body 121 away from the fins 11. The distance between the edge of the end of the flange 122 away from the main plate body 121 and the main plate body 121 is less than the distance between the welding portion 15 and the main plate body 121.

[0040] It should be noted that the second heat exchange tube 14 is a hollow tube, and the port of the second heat exchange tube 14 has solder, which is convenient for welding.

[0041] Specifically, the distance between the edge of the end of the flange 122 away from the main plate body 121 and the main plate body 121 is L1, and the distance between the welding portion 15 and the main plate body 121 is L2. L1 and L2 satisfy L1 < L2.

[0042] In the heat exchanger 10 provided by the present application, by setting the distance between the edge of the end of the flange 122 away from the main plate body 121 and the main plate body 121 to be less than the distance between the welding portion 15 and the main plate body 121, when welding the welding portion 15 with a welding flame, the flange 122 will not block the action of the flame on the welding portion 15, and the flame can uniformly heat the welding portion 15, thereby fully melting the solder located at the welding portion 15 and enabling the solder to fully penetrate, avoiding the situation of missed welding, improving the welding qualification rate, and improving the connection stability of the second heat exchange tube 14; the flange 122 extends in a direction away from the fins 11, which can protect the first heat exchange tube 13 and the second heat exchange tube 14, and can also avoid large-area blocking of the fins 11 and reducing the heat exchange effect.

[0043] In some embodiments, the second heat exchange tube 14 is a semi-circular tube, and both ends of the semi-circular tube are welded and fixed to the first heat exchange tube 13.

[0044] In some embodiments, please refer to Figure 3 and Figure 4 , the end of the first heat exchange tube 13 has an opening 131, the inner diameter of the opening 131 is greater than the outer diameter of the connection end of the second heat exchange tube 14, and the second heat exchange tube 14 is inserted into the opening 131. It can be understood that during assembly, the second heat exchange tube 14 is first inserted into the opening 131 for pre-assembly, which also plays a role of limiting and fixing, and then welding assembly is performed using a welding flame.

[0045] In some embodiments, the opening 131 is a flared opening formed by flaring treatment. The inner diameter of the opening 131 is larger than the inner diameter of the pipe section of the first heat exchange tube 13 that connects to the opening 131. In this way, it is beneficial for the second heat exchange tube 14 to be inserted into the first heat exchange tube 13. It should be noted that the flaring treatment refers to improving the contact surface or interface of the first heat exchange tube 13 to expand or deform its end. The flaring treatment can adopt conventional methods known in the art, such as using tools to expand the end of the second heat exchange tube 14, or heating the end of the second heat exchange tube 14 to make it reach an appropriate opening size through thermal expansion and contraction.

[0046] In some embodiments, referring to Figure 5 and Figure 6 , a plurality of first flanging holes 1211 are formed in the main board body 121. The first heat exchange tube 13 passes through the first flanging holes 1211 and extends in a direction away from the fin 11. Further, the flanging edge of the first flanging hole 1211 extends in a direction close to the second heat exchange tube 14. Since the first flanging hole 1211 has a flanging structure, the contact area between the first flanging hole 1211 and the first heat exchange tube 13 can be increased, thereby increasing the connection reliability and stability between the two.

[0047] In some embodiments, a plurality of first flanging holes 1211 are arranged in two rows along the extending direction of the folding edge 122 on the main board body 121, and the first flanging holes 1211 in the two rows are arranged in a staggered manner. The heat exchanger 10 includes a plurality of first heat exchange tubes 13 and a plurality of second heat exchange tubes 14. For the same second heat exchange tube 14, its two ends are respectively connected to the first heat exchange tube 13 passing through the first row of first flanging holes 1211 and the second heat exchange tube 14 passing through the second row of first flanging holes 1211. In this way, it is beneficial for the heat exchanger 10 to perform sufficient and uniform heat exchange, improving the heat exchange effect.

[0048] It should be noted that the material of the second heat exchange tube 14 has elasticity. Before the second heat exchange tube 14 passes through the first flanging hole 1211, the outer diameter of the second heat exchange tube 14 is larger than the inner diameter of the first flanging hole 1211. By processing the second heat exchange tube 14 to cause temporary elastic deformation, after the outer diameter of the second heat exchange tube 14 is smaller than the inner diameter of the first flanging hole 1211, it is then passed through the first flanging hole 1211. After passing through the first flanging hole 1211, the second heat exchange tube 14 will tend to recover its deformation due to its elasticity, so as to fully abut against the inner diameter of the first flanging hole 1211, improving the sealing performance between the second heat exchange tube 14 and the end plate 12 and preventing refrigerant leakage.

[0049] In some embodiments, please continue to participate in Figure 5 and Figure 6, the end plate 12 further includes a first connecting portion 123. The first connecting portion 123 is connected to the flanging 122 and is located on the side of the main board body 121 close to the fin 11. The first connecting portion 123 extends in the direction close to the fin 11. The first connecting portion 123 is used for connecting the heat exchanger 10 and other components such as the middle partition plate 20, the side plate 30, etc.

[0050] In some embodiments, the end plate 12 includes a plurality of first connecting portions 123. The plurality of first connecting portions 123 are arranged at intervals and are connected to the flanging 122. Specifically, the end plate 12 includes a continuous flanging 122 along the edge direction of the main board body 121, and the plurality of first connecting portions 123 are arranged at intervals and connected to the continuous flanging 122.

[0051] It can be understood that the first connecting portion 123 can be used to connect to a plurality of different components. Therefore, the first connecting portions 123 can be arranged at uniform intervals, or can be arranged at non-uniform intervals according to the positions of the actually connected components.

[0052] In some embodiments, the main board body 121 is perpendicular to the flanging 122, and the flanging 122 and the first connecting portion 123 are located in the same plane.

[0053] In some embodiments, there is a notch 16 between the first connecting portion 123 and the main board body 121, and the notch 16 has the same size as the first connecting portion 123. It should be noted that the notch 16 and the main board body 121 are in the same plane. Having the same size means that when the first connecting portion 123 is folded to the same plane as the main board body 121, the outer wall of the first connecting portion 123 can fit the inner wall of the notch 16, and the first connecting portion 123 can be entirely located within the notch 16.

[0054] In some embodiments, a first connecting hole 1231 is formed in the first connecting portion 123, and the orthographic projection of the main board body 121 on the plane where the first connecting portion 123 is located covers the center of the first connecting hole 1231. It can be understood that the notch 16 is an avoidance opening. When connecting the heat exchanger 10 to other components using a connecting member such as a screw, the screw passing through the first connecting hole 1231 will abut against the side wall of the main board body 121 on the side close to the flanging 122, thereby preventing the screw from penetrating deeply and damaging the first heat exchange tube 13.

[0055] In some other embodiments, the orthographic projection of the second heat exchange tube 14 on the plane where the first connecting portion 123 is located does not overlap with the center of the first connecting hole 1231. In this way, it can also prevent the screw from penetrating deeply and piercing the first heat exchange tube 13.

[0056] In some embodiments, the first connecting hole 1231 can be a second flanging hole, and the flanging edge of the second flanging hole extends in the direction close to the main board body 121.

[0057] In some embodiments, the first connecting portion 123 and the hem 122 are integrally formed.

[0058] Specifically, please refer to Figure 7 and Figure 8 When preparing the end plate 12, during the processing and blanking stage of the sheet metal part, the main board body 121, the hem 122, and the first connecting portion 123 are all located in the same plane. The first connecting portion 123 is located at the notch 16. There is a bending line between the main board body 121 and the hem 122. The center of the first connecting hole 1231 on the first connecting portion 123 is located on the extension line of the bending line. The first connecting portion 123 is not bent, and the flanging method of the first flanging hole 1211 and the first connecting hole 1231 on the main board body 121 is the same, and the processing can be completed using the same set of molds. When bending, the hem 122 is bent in the direction close to the second heat exchange tube 14, and the first connecting portion 123 is bent in the direction away from the second heat exchange tube 14. After the first connecting portion 123 is bent, the notch 16 is exposed, which can be used for the avoidance of the connecting piece after passing through the first connecting hole 1231.

[0059] The preparation process of the end plate 12 provided by this application is convenient, the forming is simple, and the cost is low. The hem 122 avoiding the welding portion 15 improves the welding qualification rate. The first connecting portion 123 can meet the connection with other components, and at the same time, it also prevents the situation that a long connecting piece punches through the second heat exchange tube 14 after passing through the first connecting hole 1231.

[0060] Please refer to Figure 9 and Figure 10 The heat exchanger 10 provided by this application can be applied to the outdoor unit 100.

[0061] In some embodiments, the outdoor unit 100 includes a middle partition 20. The middle partition 20 is provided with a second connecting portion, and the first connecting portion 123 is connected to the second connecting portion. Specifically, the second connecting portion can be a second connecting hole. After the first connecting hole 1231 and the second connecting hole are aligned, they are connected by connecting pieces such as screws.

[0062] It can be understood that the outdoor unit 100 may further include side plates 30, etc. The side plates 30 can be fixedly connected to the heat exchanger 10 through the first connecting portion 123.

[0063] In a second aspect, the embodiments of this application further provide an air conditioner, and the air conditioner includes the above-mentioned heat exchanger 10.

[0064] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are proposed in this application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

[0065] For each patent, patent application, patent application publication, and other materials cited in this application, such as articles, books, specifications, publications, documents, etc., their entire contents are hereby incorporated into this application by reference, except for application history documents that are inconsistent with or conflict with the content of this application, and also except for documents that limit the broadest scope of the claims of this application (currently or subsequently appended to this application). It should be noted that if there are inconsistencies or conflicts between the descriptions, definitions, and / or uses of terms in the attached materials of this application and the content of this application, the descriptions, definitions, and / or uses of terms in this application shall prevail.

Claims

1. A heat exchanger, characterized in that, The heat exchanger includes fins and end plates. The end plates are located at the ends of the fins. The end plates include main body plates and flanges. The flanges are formed at the edges of the main body plates and extend in a direction away from the fins. The heat exchanger further includes a first heat exchange tube and a second heat exchange tube. The first heat exchange tube sequentially passes through the fins and the main body plates and is then welded and fixed to the second heat exchange tube. The welding portion of the first heat exchange tube and the second heat exchange tube is located on the side of the main body plate away from the fins. The distance between the edge of the end of the flange away from the main body plate and the main body plate is less than the distance between the welding portion and the main body plate.

2. The heat exchanger according to claim 1, characterized in that, The end of the first heat exchange tube has an opening. The inner diameter of the opening is greater than the outer diameter of the connecting end of the second heat exchange tube. The second heat exchange tube is inserted into the opening.

3. The heat exchanger according to claim 2, characterized in that, The opening is an expanded opening formed by an expanding process. The inner diameter of the opening is greater than the inner diameter of the tube section of the first heat exchange tube connecting the opening.

4. The heat exchanger according to claim 1, characterized in that, A plurality of first flanging holes are formed in the main body plate. The first heat exchange tube passes through the first flanging holes and extends in a direction away from the fins.

5. The heat exchanger according to claim 1, characterized in that, The end plate further includes a first connecting portion. The first connecting portion is connected to the flange and is located on the side of the main body plate close to the fins. The first connecting portion extends in a direction close to the fins.

6. The heat exchanger according to claim 5, wherein, The end plate includes a plurality of the first connecting portions. The plurality of first connecting portions are arranged at intervals and are connected to the flange.

7. The heat exchanger according to claim 5, characterized in that, There is a notch between the first connecting portion and the main body plate, and the notch has the same size as the first connecting portion.

8. The heat exchanger according to claim 5, characterized in that, A first connecting hole is formed in the first connecting portion. The orthographic projection of the main body plate on the plane where the first connecting portion is located covers the center of the circle of the first connecting hole.

9. The heat exchanger according to claim 5, characterized in that, The heat exchanger is applicable to an outdoor unit. The outdoor unit includes a middle partition plate. A second connecting portion is provided on the middle partition plate. The first connecting portion and the second connecting portion are connected.

10. An air conditioner, characterized in that, The air conditioner includes the heat exchanger according to any one of claims 1 to 9.

Images