Heat exchanger and processing method for heat exchanger

Abstract

The present application relates to a heat exchanger and a processing method for the heat exchanger. The heat exchanger comprises fins and heat exchange tubes; the fins comprise first holes; each heat exchange tube comprises a tube wall and a turbulence portion, and the turbulence portion is located inside the heat exchange tube; the heat exchange tubes pass through the first holes and are connected to the fins; each heat exchange tube further comprises at least one circulation channel, and a wall enclosing the circulation channel comprises at least part of the tube wall and at least part of the turbulence portion; the tube wall comprises a first layer and a second layer, the second layer comprises a solder layer, and along the thickness direction of the tube wall, at least one side of the first layer is connected to the second layer. The heat exchange tubes are soldered to the fins by means of the solder layers, so that the heat exchange efficiency of the heat exchanger on an air side can be improved, the heat exchange efficiency of the heat exchanger on a heat exchange medium side can be improved by means of the turbulence portions provided inside the heat exchange tubes, the heat exchange uniformity of the air side and the heat exchange medium side is high, and the heat exchange efficiency of the heat exchanger is further improved.

Description

Heat exchanger and heat exchanger processing method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority and benefits of the Chinese patent application with application number 202410114543.X and application date January 26, 2024. The entire contents of the above-mentioned Chinese patent application are hereby incorporated by reference into this application. Technical Field

[0003] The present invention relates to the technical field of heat exchangers, in particular to a heat exchanger and a processing method for the heat exchanger. Background Art

[0004] In related art, heat exchangers consist of fins and heat exchange tubes. During assembly, the tubes are connected to the fins by threading them through the fins and then expanding them. However, this connection creates a gap between the tubes and the fins, resulting in excessive thermal resistance between the tubes and the fins, and reducing the heat exchange performance of the heat exchanger. Summary of the Invention

[0005] The embodiments of the present application provide a heat exchanger and a method for processing the heat exchanger, which are used to improve the heat exchange performance of the heat exchanger.

[0006] A first aspect of an embodiment of the present application provides a heat exchanger, comprising:

[0007] a fin, the fin comprising a first hole;

[0008] a heat exchange tube, the heat exchange tube comprising a tube wall and a flow spoiler, the flow spoiler being located inside the heat exchange tube; the heat exchange tube passing through the first hole and being connected to the fin;

[0009] The heat exchange tube further comprises at least one circulation channel, and the wall enclosing the circulation channel comprises at least a portion of the tube wall and at least a portion of the flow-disturbing portion;

[0010] The tube wall includes a first layer and a second layer, the second layer includes a solder layer, and along the thickness direction of the tube wall, at least one side of the first layer is connected to the second layer.

[0011] The heat exchange tube of the embodiment of the present application includes a tube wall and a flow spoiler. The tube wall includes a first layer and a second layer, that is, the tube wall of the heat exchange tube can be a combination of two or more layers of material, and the first layer is connected to the second layer on at least one side of the tube wall thickness direction. The second layer includes a solder layer, eliminating the need for a separate solder layer on the tube wall, facilitating welding of the heat exchange tube to the fin. After welding, there is no gap or a very small gap between the outer wall of the heat exchange tube and the first hole of the fin, thereby reducing the thermal resistance of the heat exchanger, improving the heat exchange efficiency between the gas in the air duct and the heat exchange medium in the flow channel of the heat exchange tube, and improving the heat exchange efficiency of the heat exchanger on the air side. The flow spoiler is located inside the heat exchange tube. The flow spoiler in this embodiment can disturb the heat exchange medium in the flow channel, enhance the turbulence of the heat exchange medium in the flow channel, and increase the contact area between the heat exchange tube and the heat exchange medium, thereby improving the heat exchange efficiency of the heat exchanger. Therefore, welding the heat exchange tube to the fin through the solder layer can improve the heat exchange efficiency of the heat exchanger on the air side. The turbulent portion arranged inside the heat exchange tube can improve the heat exchange efficiency of the heat exchanger on the heat exchange medium side, and make the heat exchange uniformity between the air side and the heat exchange medium side higher, further improving the heat exchange efficiency of the heat exchanger.

[0012] In a specific embodiment, there is one flow channel, and the flow spoiler is integrally formed with the tube wall.

[0013] In a specific embodiment, there are at least two flow channels, and the flow spoiler is integrally formed with the tube wall, or the flow spoiler is fixedly connected to the tube wall.

[0014] In a specific embodiment, the tube wall has the solder layer inside the heat exchange tube, and / or the flow spoiler has the solder layer inside the heat exchange tube, and the flow spoiler is connected to the tube wall through the solder layer.

[0015] In a specific embodiment, the tube wall and / or the spoiler has a protruding structure, and the protruding structure is located inside the heat exchange tube.

[0016] In a specific embodiment, the spoiler is a protrusion on the tube wall, and the height of the protrusion is less than or equal to 1 / 2 of the diameter of the heat exchange tube.

[0017] Another aspect of the present application provides a method for processing a heat exchanger, the method comprising:

[0018] take the board;

[0019] bending the sheet;

[0020] The bent plates are metallurgically bonded to form heat exchange tubes by sealing the plates circumferentially.

[0021] Take a fin and pass the heat exchange tube through the first hole of the fin;

[0022] The heat exchange tubes and the fins are welded.

[0023] In this embodiment, the heat exchange tube is formed by bending the sheet material, making the structure of the formed heat exchange tube more flexible. By changing the material and structure of the sheet material, the formed heat exchange tube can have specific characteristics to meet the needs of use. During the processing of the heat exchanger, the heat exchange tube is passed through the first hole of the fin and the two are connected by welding. The heat exchange tube and the fin are no longer connected by expansion tubes or other methods that may cause mechanical wear, thereby reducing the risk of damage to the internal structure of the heat exchange tube and causing a decrease in heat exchange performance on the heat exchange medium side. When the heat exchange tube and the fin are welded, there is no gap or a very small gap between the outer wall of the heat exchange tube and the first hole of the fin, thereby reducing the thermal resistance of the heat exchanger, improving the heat exchange efficiency between the gas in the air duct and the heat exchange medium in the circulation channel of the heat exchange tube, and improving the heat exchange efficiency of the heat exchanger on the air side.

[0024] In a specific embodiment, when the bent plates are metallurgically bonded to form circumferentially sealed heat exchange tubes, the processing method includes:

[0025] The bent sheet is high-frequency welded, or the bent sheet is spin-sealed, or the bent sheet is pressure-processed and sealed.

[0026] Another aspect of the present application provides a method for processing a heat exchanger, the method comprising:

[0027] take the board;

[0028] bending and pre-fixing the sheet;

[0029] There is a preset gap t between the two ends of the pre-fixed plate in the circumferential direction, and the preset gap t is less than 0.5 mm;

[0030] Take the fin and pass the pre-fixed plate through the first hole of the fin;

[0031] The pre-fixed plate is welded to the fin, and both ends of the pre-fixed plate along the circumferential direction are welded.

[0032] In this embodiment, when the preset gap between the first and second ends of the circumferentially unsealed heat exchange tube after pre-fixation is less than 0.5 mm, during the welding process, the gap between the first and second ends is small, and the brazing layer enters the preset gap due to capillary action, thereby fully filling the preset gap and improving the welding reliability of the first and second ends. In addition, in this embodiment, the first and second ends of the circumferentially unfixed heat exchange tube are welded simultaneously with the fin, eliminating the need for multiple welding operations and improving processing efficiency.

[0033] In addition, the heat exchange tubes in the embodiments of the present application are formed by bending the plate, making the structure of the formed heat exchange tubes more flexible. The formed heat exchange tubes can have specific characteristics by changing the material and structure of the plate to meet the use requirements. When the heat exchanger is processed, the heat exchange tubes are passed through the first holes of the fins and the two are connected by welding. The heat exchange tubes and fins are no longer connected by expansion tubes or other methods that may cause mechanical wear, thereby reducing the risk of the internal structure of the heat exchange tubes being damaged and causing the heat exchange performance on the heat exchange medium side to decrease. When the heat exchange tubes and fins are welded, there is no gap or a very small gap between the outer wall of the heat exchange tube and the first hole of the fin, thereby reducing the thermal resistance of the heat exchanger, improving the heat exchange efficiency between the gas in the air duct and the heat exchange medium in the circulation channel of the heat exchange tube, and improving the heat exchange efficiency of the heat exchanger on the air side.

[0034] In a specific embodiment, when pre-fixing the bent plate, the processing method includes:

[0035] The bent plate is pre-fixed by a clamp, or the bent plate is pre-fixed by pressing, or the bent plate is pre-fixed at both ends along the circumference by spot welding, or the plate is pre-fixed by pressing from the inner side during the plate bending process.

[0036] In a specific embodiment, before bending the plate, the processing method further comprises: punching or rolling the surface of the plate to form a protrusion; or,

[0037] After the plate is bent, the processing method further comprises: internally spinning the bent plate to form a protrusion.

[0038] In a specific embodiment, when the plate is bent, a spoiler is formed inside the plate.

[0039] In a specific embodiment, the combined length of the circumferentially closed heat exchange tubes is L, the minimum thickness of the plate is d, and L ≥ d / 2. It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG1 is a schematic structural diagram of a heat exchanger provided in this application in a specific embodiment;

[0041] FIG2 is a schematic diagram of a partial structure of a heat exchanger provided in this application in a specific embodiment;

[0042] FIG3 is a front view of the heat exchange tube in FIG2 in a specific embodiment;

[0043] FIG4 is a schematic diagram of a partial structure of a heat exchanger provided in this application in another specific embodiment;

[0044] FIG5 is a front view of a heat exchange tube provided in the present application in a specific embodiment;

[0045] FIG6 is a cross-sectional view of a heat exchange tube provided in the present application in another specific embodiment;

[0046] FIG7 is a cross-sectional view of another specific embodiment of the heat exchange tube provided in the present application;

[0047] FIG8 is a front view of another specific embodiment of the heat exchange tube provided in the present application;

[0048] FIG9 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment;

[0049] FIG10 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment;

[0050] FIG11 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment;

[0051] FIG12 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment;

[0052] FIG13 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment;

[0053] FIG14 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment;

[0054] FIG15 is a front view of another specific embodiment of the heat exchange tube provided by the present application;

[0055] FIG16 is a front view of another specific embodiment of the heat exchange tube provided by the present application;

[0056] FIG17 is a schematic structural diagram of a heat exchange tube that is not circumferentially closed during the heat exchanger processing in a specific embodiment;

[0057] FIG18 is a front view of FIG17;

[0058] FIG19 is a schematic structural diagram of a heat exchange tube that is not circumferentially closed during the heat exchanger processing in a specific embodiment;

[0059] Figure 20 is a front view of Figure 19;

[0060] FIG21 is a schematic structural diagram of a heat exchange tube that is not circumferentially closed during the heat exchanger processing in a specific embodiment;

[0061] Figure 22 is a front view of Figure 21;

[0062] FIG23 is a schematic structural diagram of a heat exchange tube that is not circumferentially closed during the heat exchanger processing in a specific embodiment;

[0063] FIG. 24 is a front view of FIG. 23 .

[0064] Explanation of the reference numerals: 1-heat exchange tube; 11-circulation channel; 12-tube wall; 13-spoiler; 131-first spoiler; 132-second spoiler; 14-first layer; 15-second layer; 2-fin; 3-circumferentially unclosed heat exchange tube; 31-first end; 32-second end; 4-manifold.

[0065] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0066] The embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present disclosure, but should not be understood as limiting the present disclosure.

[0067] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0068] As shown in Figure 1, Figure 1 is a schematic structural diagram of a heat exchanger provided in this application in a specific embodiment. The heat exchanger includes two headers 4, at least one heat exchange tube 1, and at least two fins 2. The heat exchange tube 1 extends along its length and connects the two headers 4. The fins 2 are connected to the heat exchange tubes 1, and air ducts for gas circulation are formed between adjacent fins 2. The connected heat exchange tubes 1 and headers 4 form a flow channel for the circulation of heat exchange medium, allowing heat exchange between the gas in the air duct and the heat exchange medium in the heat exchange tubes 1.

[0069] In the related art, a typical method for assembling a heat exchanger is to connect the heat exchanger and fins through expansion tubes. Specifically, the fins have a first hole. During assembly, the heat exchange tube is passed through this first hole, leaving a gap between the sidewall of the first hole and the outer wall of the heat exchange tube. The heat exchange tube is then expanded to securely connect the heat exchange tube to the sidewall of the first hole. This assembly method creates a gap between the heat exchange tube and the sidewall of the first hole, resulting in a large thermal resistance and reduced heat exchange efficiency.

[0070] In order to solve this technical problem, an embodiment of the present application provides a heat exchanger, as shown in FIG2 , which is a schematic diagram of the partial structure of the heat exchanger provided in the present application in a specific embodiment. The heat exchanger includes at least two fins 2 and at least one heat exchange tube 1. The fin 2 is provided with at least one first hole. The heat exchange tube 1 passes through the first hole of the fin 2 and is connected to the side wall of the first hole. The heat exchange tube 1 is a tubular structure formed by bending a plate, and the heat exchange tube 1 is formed by bending the plate to form at least one circulation channel 11 for the circulation of the heat exchange medium. The plate described in this embodiment is a flat plate structure. When processing the heat exchanger, the plate of the flat plate structure is bent and circumferentially sealed to form the heat exchange tube 1.

[0071] As shown in Figure 3, Figure 3 is a front view of the heat exchange tube in Figure 2 in a specific embodiment. In this embodiment, the heat exchange tube 1 includes a tube wall 12. The tube wall 12 includes a first layer 14 and a second layer 15 along its thickness. The second layer 15 is connected to at least one side of the first layer 14 along the thickness of the tube wall 12. In a specific embodiment, the first layer 14 is connected to the second layer 15 on at least one side facing away from the interior of the heat exchange tube 1. The second layer 15 comprises a solder layer, through which the heat exchange tube 1 is welded to the fin 2 after passing through the first hole of the fin 2. Compared to conventional heat exchange tubes, such as those extruded by expansion tubes, which can only be made of a single layer of material, the tube wall 12 of the heat exchange tube 1 in this embodiment comprises a first layer 14 and a second layer 15. That is, the tube wall 12 of the heat exchange tube 1 can be a combination of two or more layers of material, and the second layer 15 comprises a solder layer. During the processing of the heat exchanger shown in FIG2 , the heat exchange tube 1 is passed through the first hole of the fin 2 and then the two are welded together through the solder layer. The heat exchange tube and fin are no longer connected by mechanical wear methods such as expansion tubes, thereby reducing the risk of structural damage to the heat exchange tube 1 and thus reducing heat transfer performance on the heat exchange medium side. The inclusion of the solder layer in the plate material used to form the heat exchange tube 1 facilitates welding of the heat exchange tube 1 and the fin 2. After welding, there is no gap or a very small gap between the outer wall of the heat exchange tube 1 and the first hole of the fin 2, thereby reducing the thermal resistance of the heat exchanger, improving the heat exchange efficiency between the gas in the air duct and the heat exchange medium in the flow channel 11 of the heat exchange tube 1, and improving the heat exchange efficiency on the air side of the heat exchanger.

[0072] The first layer 14 may be made of aluminum or an aluminum alloy. The second layer 15 may be made of aluminum or an aluminum alloy and may also include silicon, with the mass percentage of silicon being 2 wt.% to 12 wt.%. In this embodiment, when the mass percentage of silicon in the second layer 15 is 2 wt.% to 12 wt.%, welding can be better achieved.

[0073] Of course, the first layer 14 and the second layer 15 in the present application can also be made of other materials, and the present application does not limit the materials of the first and second layers and the content of each element. It is understandable that the tube wall 12 can also include a third layer or a fourth layer and other multi-layer structures.

[0074] In a specific embodiment, as shown in Figures 4 and 5, Figure 4 is a schematic diagram of the partial structure of the heat exchanger provided in this application in another specific embodiment; Figure 5 is a front view of the heat exchange tube provided in this application in a specific embodiment. The heat exchange tube 1 includes a tube wall 12 and a flow spoiler 13. The flow spoiler 13 is located inside the heat exchange tube 1 and is connected to the tube wall 12. The tube wall 12 and the flow spoiler 13 enclose the at least one circulation channel 11. The wall enclosing the circulation channel 11 includes at least part of the tube wall 12 and at least part of the flow spoiler 13. The flow spoiler 13 in this embodiment can play a role in disturbing the heat exchange medium in the circulation channel 11, enhance the turbulence of the heat exchange medium in the circulation channel 11, and increase the contact area between the heat exchange tube 1 and the heat exchange medium, thereby improving the heat exchange efficiency of the heat exchanger.

[0075] Therefore, in the embodiment of the present application, the heat exchange tube 1 is welded to the fin 2 through the solder layer to improve the heat exchange efficiency of the heat exchanger on the air side. The spoiler 13 arranged inside the heat exchange tube 1 can improve the heat exchange efficiency of the heat exchanger on the heat exchange medium side, and make the heat exchange uniformity between the air side and the heat exchange medium side higher, thereby further improving the heat exchange efficiency of the heat exchanger.

[0076] The sheet material bent to form the heat exchange tube 1 can be a single sheet or multiple sheets. Specifically, in the embodiment of FIG3 , the sheet material bent to form the heat exchange tube 1 is a single sheet. In the embodiment shown in FIG5 , the heat exchange tube 1 includes a flow spoiler 13, and when the flow spoiler 13 is integrally formed with the tube wall 12, the sheet material bent to form the heat exchange tube 1 is a single sheet.

[0077] In other embodiments, when the flow spoiler 13 is fixedly connected to the tube wall 12, the plate material bent to form the heat exchange tube 1 is multiple sheets. In this embodiment, the tube wall 12 of the heat exchange tube 1 includes a first layer 14 and a second layer 15. The first layer 14 is connected to the second layer 15 on at least one side located inside the heat exchange tube 1. The second layer 15 includes a solder layer, which is used to weld the tube wall 12 and the flow spoiler 13. In another specific embodiment, along the thickness direction of the tube wall 12, both sides of the first layer 14 are connected to the second layer 15, and the second layer 15 includes a solder layer. The solder layer on the side facing away from the interior of the heat exchange tube 1 is used to weld the heat exchange tube 1 and the fins, while the solder layer on the side located inside the heat exchange tube 1 is used to weld the tube wall 12 and the flow spoiler 13.

[0078] FIG6 is a cross-sectional view of another embodiment of the heat exchange tube provided in the present application, FIG7 is a cross-sectional view of another embodiment of the heat exchange tube provided in the present application, and FIG8 is a front view of another embodiment of the heat exchange tube provided in the present application. In the embodiments shown in FIG5-8, the flow spoiler 13 of the heat exchange tube 1 is a structure integrally formed with the tube wall 12, and the flow spoiler 13 protrudes relative to the tube wall 12 toward the interior of the heat exchange tube 1. In this embodiment, the flow spoiler 13 can be a structure integrally formed with the tube wall 12, and the flow spoiler 13 protrudes relative to the tube wall 12 of the heat exchange tube 1. The flow spoiler 13 protrudes toward the interior of the heat exchange tube 1. In this case, the flow spoiler 13 and the tube wall 12 enclose a flow channel 11. The flow spoiler 13 in this embodiment can increase the contact area between the heat exchange tube 1 and the heat exchange medium, and can also enhance the turbulence of the heat exchange medium in the flow channel 11, thereby improving heat exchange performance. At the same time, since the heat exchange tube 1 is formed by bending the plate, the spoiler 13 can be processed on the plate before the heat exchange tube is formed. Compared with the internal structure of the traditional extruded heat exchange tube, the spoiler 13 is more flexible. The spoiler 13 can be made into more shapes, such as cross-type threads, multi-layer spoilers, etc., further increasing the contact area between the heat exchange tube and the heat exchange medium, increasing the degree of turbulence, and improving the heat exchange performance.

[0079] In the embodiment shown in FIG. 6 , the flow-disturbing portion 13 may be a spiral structure, that is, may be an internal thread provided on the tube wall 12 .

[0080] In the embodiment shown in FIG. 7 , the spoiler 13 may be a plurality of bosses spaced apart on the tube wall 12 . The bosses may be in the shape of a truncated cone, a cone, a hemisphere, or the like.

[0081] In the embodiment shown in Figure 8, the spoiler 13 can be a plurality of bosses arranged at intervals on the tube wall 12, and the height of the bosses is relatively large, that is, the height of the spoiler 13 protruding relative to the tube wall 12 is higher, and the ends of each spoiler 13 facing away from the tube wall 12 are close to each other.

[0082] In a specific embodiment, as shown in Figures 6 and 7 , when the flow-disturbing portion 13 is a protrusion provided on the tube wall 12, the height of the protrusion can be less than or equal to 1 / 2 of the diameter of the heat exchange tube 1, where the diameter of the heat exchange tube 1 refers to the inner diameter of the heat exchange tube 1. For example, the height of the protrusion can be 1 / 4, 1 / 3, 1 / 2, etc. of the diameter of the heat exchange tube 1. Because the heat exchange tube 1 and the fin 2 are connected by welding rather than by tube expansion, the height of the protrusion within the heat exchange tube 1 can be very large, and internal structural deformation after tube expansion is avoided, thereby extending the service life of the heat exchange tube 1 and the heat exchanger.

[0083] The height of the protrusion of the flow-disturbing portion 13 in this embodiment is moderate, which can disturb the heat exchange medium in the heat exchange tube 1, and is not too large to occupy the space in the heat exchange tube 1, so that the flow channel 11 of the heat exchange tube 1 has a larger cross-sectional area, thereby increasing the flow rate of the heat exchange medium in the heat exchange tube 1, thereby improving the heat exchange efficiency of the heat exchanger.

[0084] In other embodiments, as shown in Figures 9-14, Figure 9 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment; Figure 10 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment; Figure 11 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment; Figure 12 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment; Figure 13 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment; and Figure 14 is a schematic structural diagram of a heat exchange tube provided in the present application in another specific embodiment. In this embodiment, at least one flow disruptor 13 is provided within the heat exchange tube 1. The at least one flow disruptor 13 and the tube wall 12 form at least two flow channels 11, and the at least two flow channels 11 are separated by the flow disruptor 13. The flow disruptor 13 in this embodiment can increase the contact area between the heat exchange tube 1 and the heat exchange medium and increase the turbulence of the heat exchange medium within the heat exchange tube 1, thereby improving the heat exchange efficiency of the heat exchanger.

[0085] In a specific embodiment, the spoiler 13 in the embodiments shown in Figures 9, 11 and 13 can be fixedly connected to the tube wall 12. There is no need to set the spoiler 13 on the plate that is bent to form the heat exchange tube 1. The spoiler 13 can be processed separately, that is, a piece of plate can be bent into the tube wall 12 of the heat exchange tube 1, and another piece of plate can be used to form the spoiler 13 of the heat exchange tube 1. The spoiler 13 is then placed in the tube wall 12 to form a heat exchange tube 1 with a spoiler 13, thereby simplifying the difficulty of plate processing.

[0086] It should be noted that, the flow-disturbing portion of the heat exchange tube 1 may be formed by using two, three or more plates to increase the contact area between the heat exchange tube 1 and the heat exchange medium, increase the turbulence of the heat exchange medium in the heat exchange tube 1, and thus improve the heat exchange efficiency of the heat exchanger. This is not limited here.

[0087] In a specific embodiment, the flow spoiler 13 may include a solder layer, and / or the tube wall 12 may include a solder layer, so that the flow spoiler 13 and the tube wall 12 are welded through the solder layer.

[0088] Specifically, the tube wall 12 does not include a solder layer, and a solder layer is only provided at the position where the flow spoiler 13 is connected to the tube wall 12; alternatively, the tube wall 12 includes a solder layer on one side inside the heat exchange tube, and the solder layer can be provided only at the position where the tube wall 12 is connected to the flow spoiler 13.

[0089] In another specific embodiment, the spoiler 13 and the tube wall 12 in the embodiments shown in Figures 10, 12 and 14 can be integrally formed, that is, the heat exchange tube 1 plate is provided with the spoiler 13, and the plate only needs to be bent to form the tube wall 12 and the spoiler 13, and there is no need to provide the spoiler 13 separately, thereby reducing the risk of the spoiler 13 falling off and improving the reliability of the heat exchange tube.

[0090] In the embodiments shown in Figures 9 and 10, the cross-section of the spoiler 13 is generally V-shaped, and the three ends of the spoiler 13 are connected to the tube wall 12, thereby enclosing three flow channels 11. In the embodiment shown in Figure 9, the spoiler 13 is fixedly connected to the tube wall 12, that is, the heat exchange tube 1 is formed by bending at least two sheets of plate material, one sheet of plate material is bent to form the tube wall 12, and the other sheet of plate material is bent to form the spoiler 13, and the spoiler 13 is fixedly connected to the tube wall 12 (for example, by welding). In the embodiment shown in Figure 10, the spoiler 13 is integrally formed with the tube wall 12, that is, the heat exchange tube 1 is formed by bending a single sheet of plate material, and the spoiler 13 and the tube wall 12 are formed during the bending process of the plate material.

[0091] In the embodiments shown in Figures 11 and 12, the cross-section of the spoiler 13 is generally S-shaped, and the two ends of the spoiler 13 are connected to the tube wall 12, thereby enclosing two flow channels 11. In the embodiment shown in Figure 11, the spoiler 13 is fixedly connected to the tube wall 12, that is, the heat exchange tube 1 is formed by bending at least two sheets of plate material, one sheet of plate material is bent to form the tube wall 12, and the other sheet of plate material is bent to form the spoiler 13, and the spoiler 13 is fixedly connected to the tube wall 12 (for example, welded). In the embodiment shown in Figure 12, the spoiler 13 is integrally formed with the tube wall 12, that is, the heat exchange tube 1 is formed by bending a single sheet of plate material, and the spoiler 13 and the tube wall 12 are formed during the bending of the plate material.

[0092] In the embodiments shown in Figures 13 and 14, the cross-section of the spoiler 13 is generally wavy, and both ends of the spoiler 13 are connected to the tube wall 12, thereby enclosing two flow channels 11. In the embodiment shown in Figure 13, the spoiler 13 is fixedly connected to the tube wall 12, that is, the heat exchange tube 1 is formed by bending at least two sheets of plate material, one sheet of plate material is bent to form the tube wall 12, and the other sheet of plate material is bent to form the spoiler 13, and the spoiler 13 is fixedly connected to the tube wall 12 (for example, by welding). In the embodiment shown in Figure 14, the spoiler 13 is integrally formed with the tube wall 12, that is, the heat exchange tube 1 is formed by bending a single sheet of plate material, and the spoiler 13 and the tube wall 12 are formed during the bending process of the plate material.

[0093] In other embodiments, the spoiler 13 may also have other structures. For example, the cross-section of the spoiler 13 may be W-shaped, Y-shaped, Z-shaped, etc. The present application does not limit the specific shape of the spoiler 13.

[0094] Specifically, as shown in Figure 15, Figure 15 is a front view of another specific embodiment of the heat exchange tube provided in this application. In this embodiment, in the plate material bent to form the heat exchange tube 1, the first layer 14 has a second layer 15 on both sides along the thickness direction, and the second layer 15 includes a solder layer. That is, in the heat exchange tube 1, the tube wall 12 includes a first layer 14 and two second layers 15, and the two second layers 15 are located on both sides of the first layer 14 along the thickness direction of the tube wall 12, and the two second layers 15 each include a solder layer. The solder layer located inside the heat exchange tube 1 is used for welding to the spoiler 13, and the solder layer located outside the heat exchange tube 1 is used for welding to the fin 2.

[0095] Therefore, in this embodiment, the tube wall 12 has a solder layer inside the heat exchange tube 1, and the spoiler 13 is welded to the tube wall 12 through the solder layer. The tube wall 12 may also have a solder layer on the outside of the heat exchange tube 1, and the fins 2 are welded to the tube wall 12 through the solder layer. The three-layer structure of the tube wall 12 of the heat exchange tube 1 in this embodiment facilitates the welding of the heat exchange tube 1 and the fins 2, and also facilitates the welding of the tube wall 12 of the heat exchange tube 1 and the spoiler 13.

[0096] It should be noted that the plate material bent to form the heat exchange tube 1 may also have a structure of more than three layers, so that the tube wall 12 of the heat exchange tube 1 may have a structure of more than three layers.

[0097] In another specific embodiment, as shown in FIG16 , FIG16 is a front view of another specific embodiment of the heat exchange tube provided in this application. In this embodiment, the interior of the heat exchange tube 1 includes a first spoiler 131 and a second spoiler 132. The first spoiler 131 is a structure that protrudes relative to the tube wall 12, and the first spoiler 131 and the tube wall 12 are integrally formed. In one specific embodiment, the second spoiler 132 is fixedly connected to the tube wall 12. The tube wall 12 may include a solder layer (not shown) on one side of the interior of the heat exchange tube 1, and the second spoiler 132 is welded to the tube wall 12 via the solder layer. In other embodiments, the second spoiler 132 can also be integrally formed with the tube wall 12 using a single sheet of material. The protrusions of the first spoiler 131 and other structures are first formed on the sheet of material, and then the sheet with the protrusions is rolled into the tube wall 12 and the second spoiler 132 of the heat exchange tube 1.

[0098] In this embodiment, when the first flow spoiler 131 and the second flow spoiler 132 are provided in the heat exchange tube 1, the contact area between the heat exchange tube 1 and the heat exchange medium is increased, thereby further improving the heat exchange efficiency.

[0099] In order to solve the problem of low heat exchange efficiency of the heat exchanger, the embodiment of the present application further provides a heat exchanger processing method, which comprises at least the following steps:

[0100] Take a plate; wherein the plate includes at least a first layer 14 and a second layer 15 along the thickness direction, and the second layer 15 includes a solder layer.

[0101] The plate is bent to form a circumferentially unsealed heat exchange tube, as shown in Figures 17-20. Figure 17 is a schematic structural diagram of a circumferentially unsealed heat exchange tube in a specific embodiment during heat exchanger processing; Figure 18 is a front view of Figure 17; Figure 19 is a schematic structural diagram of a circumferentially unsealed heat exchange tube in a specific embodiment during heat exchanger processing; and Figure 20 is a front view of Figure 19. In this embodiment, the circumferentially unsealed heat exchange tube 3 includes a first end 31 and a second end 32, which are spaced apart along the circumference of the circumferentially unsealed heat exchange tube 3. Meanwhile, during the bending process of the plate, when the plate includes a first layer 14 and a second layer 15, the plate is bent toward one side of the first layer 14, so that the second layer 15 is located outside the circumferentially unsealed heat exchange tube 3.

[0102] The bent plate is metallurgically bonded to close the circumferentially unclosed heat exchange tube 3 to form a heat exchange tube 1; that is, the first end 31 and the second end 32 of the circumferentially unclosed heat exchange tube 3 are connected by metallurgical bonding to form a circumferentially closed heat exchange tube 1.

[0103] Metallurgical bonding refers to the process of melting the surfaces of two objects to be joined at high temperatures to form a melt that is then cooled and solidified to achieve the desired bond. In this embodiment, as shown in Figures 17 and 18 , metallurgical bonding of the circumferentially unsealed heat exchange tube 3 involves melting the first end 31 and / or the second end 32 at high temperatures to form a melt. After the melt cools and solidifies, the first end 31 and the second end 32 are connected, thereby circumferentially sealing the circumferentially unsealed heat exchange tube 3 to form a heat exchange tube 1. The tube wall 12 of the heat exchange tube 1 includes at least a first layer 14 and a second layer 15 along its thickness, with the second layer 15 comprising a solder layer on the side of the tube wall 12 facing away from the interior of the heat exchange tube 1.

[0104] The heat exchange tube 1 is formed by bending a sheet material. The sheet material and structure can be modified to impart specific characteristics to the formed heat exchange tube, thereby meeting application requirements. The sheet material can be formed from two or more layers of material. For example, the sheet material may include a first layer 14 and a second layer 15, or a sheet material may include a first layer 14 and two second layers 15. It is understood that the sheet material may also include a third or fourth layer, or multiple layers of different materials.

[0105] Take fin 2, pass the heat exchange tube 1 through the first hole of fin 2, and fix the heat exchange tube 1 to fin 2; in this step, the heat exchange tube 1 and fin 2 are pre-fixed to limit the relative movement of the heat exchange tube 1 and fin 2, thereby reducing the risk of the relative movement between the two affecting the welding reliability during the welding process.

[0106] The heat exchange tube 1 and the fin 2 are fixedly connected and welded. Since the tube wall 12 of the heat exchange tube 1 has a second layer 15 including a solder layer on the side facing away from the interior of the heat exchange tube 1 , the heat exchange tube 1 and the fin 2 are welded through the solder layer.

[0107] Specifically, after the heat exchange tube 1 is inserted into the fin 2, both ends of the heat exchange tube 1 are inserted into the header 4, and after assembly, they are welded together to complete the welding of the heat exchange tube 1 and the fin 2, and the header 4 and the heat exchange tube 1. Optionally, the welding method is brazing.

[0108] The fin 2 may be provided with a flange (not shown in the figure) around the first hole, and the flange is convenient for welding with the heat exchange tube 1 and improves the welding reliability of the two.

[0109] In a specific embodiment, the weld length when the heat exchange tube 1 and the fin 2 are welded can be greater than half the circumference of the heat exchange tube, thereby improving the welding reliability of the heat exchange tube 1 and the fin 2 and enhancing the heat exchange efficiency.

[0110] In this embodiment, when processing the heat exchanger, the heat exchange tube 1 is passed through the first hole of the fin 2 and then the two are connected by welding. The heat exchange tube and the fin are no longer connected by a method that may cause mechanical wear, such as expansion tubes, thereby reducing the risk of damage to the internal structure of the heat exchange tube 1 and resulting in a decrease in heat exchange performance on the heat exchange medium side. When the heat exchange tube 1 and the fin 2 are welded, there is no gap or a very small gap between the outer wall of the heat exchange tube 1 and the first hole of the fin 2, thereby reducing the thermal resistance of the heat exchanger, improving the heat exchange efficiency between the gas in the air duct and the heat exchange medium in the circulation channel 11 of the heat exchange tube 1, and improving the heat exchange efficiency of the heat exchanger on the air side. In addition, the processing method of the heat exchanger in the embodiment of the present application can also improve processing efficiency and reduce processing costs.

[0111] As shown in Figures 17 and 18 , the first end 31 and second end 32 of the circumferentially unenclosed heat exchange tube 3 in this embodiment are radially distributed and metallurgically bonded to form a circumferentially enclosed heat exchange tube. The tube wall 12 of the heat exchange tube 1 may also be provided with a raised structure, which serves as the flow disruptor 13 of the heat exchange tube 1.

[0112] As shown in Figures 19 and 20, the first end 31 and second end 32 of the circumferentially unsealed heat exchange tube 3 in this embodiment are located outside the circumferentially unsealed heat exchange tube 3. After metallurgical bonding, the first end 31 and second end 32 are located outside the heat exchange tube 1. This structure facilitates metallurgical bonding of the first end 31 and second end 32, improving processing efficiency. In addition, in this embodiment, the tube wall 12 of the heat exchange tube 1 can also be provided with a protrusion structure, which serves as the flow spoiler 13 of the heat exchange tube 1.

[0113] In a specific embodiment, after metallurgically bonding the bent sheet material to circumferentially seal the circumferentially unsealed heat exchange tube 3 to form the heat exchange tube 1, the processing method may further include the step of drawing the circumferentially sealed heat exchange tube 1 to form a heat exchange tube 1 with a smaller diameter. The drawing operation in this step can reduce the diameter of the heat exchange tube 1, thereby improving the heat exchange effect, and increasing the refrigerant-to-weight ratio, thereby saving refrigerant and improving heat exchange efficiency. There is no need to directly bend the sheet material into the circumferentially unsealed heat exchange tube 3 with a smaller diameter, thus reducing the difficulty of sheet material bending and improving processing efficiency.

[0114] In a specific embodiment, after the bent plates are metallurgically bonded, the heat exchange tube 1 may be cut to have a desired length.

[0115] In a specific embodiment, after the bent plates are metallurgically bonded, the ends of the heat exchange tubes 1 along the axial direction may be expanded or contracted to form a structure that is convenient for connection with the header.

[0116] In a specific embodiment, when the bent plates are metallurgically bonded to form a heat exchange tube by sealing the plates circumferentially, the metallurgical bonding method may be a high-frequency welder, spinning seal, or pressure processing seal.

[0117] Specifically, high-frequency welding refers to a welding method that uses the resistance heat generated by a high-frequency current flowing through the contact surfaces of the components to be connected (for example, the circumferentially unsealed heat exchange tube 3) to connect the components. The current frequency used in high-frequency welding can be between 300kHz and 450kHz. In this embodiment, the first end 31 and the second end 32 of the circumferentially unsealed heat exchange tube 3 are connected by the action of resistance heat.

[0118] Spin sealing involves the tool advancing relative to the part being joined (e.g., the circumferentially unsealed heat exchange tube 3) as the mold rotates or the spinning tool rotates around it. This compresses the part and causes continuous, point-by-point deformation. In this embodiment, the first end 31 and second end 32 of the circumferentially unsealed heat exchange tube 3 are deformed and bonded by the spinning tool.

[0119] Pressure-processing sealing involves the use of forging equipment and dies to produce a metallurgical bond by instantaneously plastically deforming the components to be joined (e.g., the circumferentially unsealed heat exchange tube 3). By controlling the microscopic quality and pressure of the bonding surface, a good bonding effect can be achieved. In this embodiment, the first end 31 and second end 32 of the circumferentially unsealed heat exchange tube 3 undergo plastic deformation and bond.

[0120] Of course, the embodiment of the present application may also adopt other metallurgical bonding methods to form the circumferentially unclosed heat exchange tube 3 into the circumferentially closed heat exchange tube 1, and the present application does not limit the specific method of metallurgical bonding.

[0121] In a specific embodiment, before bending the plate, the processing method of the heat exchanger may further include the following steps: stamping or rolling the plate surface to form a protrusion. The protrusion may be any of the protrusions described in any of the above embodiments, such as a spiral, a thread, a truncated cone, a hemispherical shape, etc. During the bending process of the plate, the plate is bent toward the side where the protrusion is provided. After the bent plate is circumferentially sealed to form the heat exchange tube 1, the protrusion on the plate surface forms a spoiler 13. In this embodiment, the spoiler 13 is integrally formed with the tube wall 12 of the heat exchange tube 1 (integrated by stamping or rolling). The spoiler 13 in this embodiment may have the structure shown in Figures 5-8.

[0122] In this embodiment, the method of machining protrusions on the surface of the plate-like structure is easy to implement and highly efficient, thereby improving the processing efficiency of the heat exchanger and reducing processing costs. Furthermore, because the heat exchange tube 1 is formed by curling the plate, and the heat exchange tube 1 and fin 2 are connected by welding rather than expansion joints that may cause mechanical wear, various protrusion shapes can be easily machined according to actual needs, thereby forming the desired flow spoiler 13 within the heat exchange tube 1, further improving the heat exchange efficiency of the heat exchanger.

[0123] In another specific embodiment, after bending the sheet material to form the circumferentially open heat exchange tube 3, the processing method may further include the following step: internally spinning the bent sheet material to form a protrusion, that is, forming a protrusion inside the circumferentially open heat exchange tube 3 through internal spinning. In this embodiment, the flow spoiler 13 is integrally formed with the tube wall 12 of the heat exchange tube 1 (integrated through internal spinning). The flow spoiler 13 in this embodiment can have the structure shown in Figures 5-8.

[0124] In another specific embodiment, when the plate is bent, a flow spoiler 13 is also formed inside the plate. The flow spoiler may be structured as shown in Figures 21-24. Figure 21 is a schematic diagram of the structure of a heat exchange tube with an open circumference during heat exchanger processing in a specific embodiment; Figure 22 is a front view of Figure 21; Figure 23 is a schematic diagram of the structure of a heat exchange tube with an open circumference during heat exchanger processing in a specific embodiment; Figure 24 is a front view of Figure 23.

[0125] In a specific embodiment, the plate may be a single piece, and the single piece of profile is bent to form the tube wall 12 and the flow spoiler 13 of the heat exchange tube 1 . In this case, the tube wall 12 and the flow spoiler 13 are integrally formed.

[0126] In the embodiment shown in Figures 21 and 22, the first end 31 and second end 32 of the circumferentially unenclosed heat exchange tube 3 are both located inside the circumferentially unenclosed heat exchange tube 3. The first end 31 and second end 32 are metallurgically bonded to form a flow spoiler. The flow spoiler in this embodiment is a structure that protrudes from the wall of the heat exchange tube 1 toward the interior of the heat exchange tube 1.

[0127] In the embodiments shown in Figures 23 and 24, the plate is bent multiple times to form a structure with a spiral cross-section. After the first end 31 and the second end 32 of the circumferentially unclosed heat exchange tube 3 are metallurgically bonded, a flow disruptor with a spiral cross-section is formed in the heat exchange tube 1.

[0128] In other embodiments, the spoiler formed by bending the plate may also have a structure as shown in Figures 9 to 15. This application does not limit the shape of the spoiler formed by bending the plate.

[0129] In another specific embodiment, the plate can be multiple pieces, and one piece of profile is bent to form the tube wall 12, and one or more pieces of profile are bent to form the spoiler 13. At this time, the tube wall 12 and the spoiler 13 are fixedly connected, and the fixed connection method between the two can be welding.

[0130] In the above embodiments, the bonding length of the circumferentially sealed heat exchange tube 1 is L, the minimum thickness of the plate is d, and L ≥ d / 2. The bonding length L is the length of the metallurgical bonding point along the axis of the heat exchange tube 1. When L ≥ d / 2, the bonding length between the first end 31 and the second end 32 of the circumferentially unsealed heat exchange tube 3 is greater, resulting in a more reliable bond that can meet the burst pressure requirements of the heat exchanger and reduce stress concentration at the metallurgical bonding point, thereby improving the reliability and lifespan of the heat exchange tube 1.

[0131] In order to solve the problem of low heat exchange efficiency of the heat exchanger, the embodiment of the present application also provides another heat exchanger processing method, which includes at least the following steps:

[0132] Take a plate; wherein the plate includes at least a first layer 14 and a second layer 15 along the thickness direction, and the second layer 15 includes a solder layer.

[0133] The sheet material is bent and pre-fixed; the bent sheet material forms a circumferentially unenclosed heat exchange tube. As shown in Figures 17-20, in this embodiment, the circumferentially unenclosed heat exchange tube 3 includes a first end 31 and a second end 32, which are spaced apart along the circumference of the circumferentially unenclosed heat exchange tube 3. Furthermore, during the bending process, when the sheet material includes a first layer 14 and a second layer 15, the sheet material is bent toward the first layer 14, so that the second layer 15 is located outside the circumferentially unenclosed heat exchange tube 3.

[0134] There is a preset gap t between the two ends of the pre-fixed plate along the circumferential direction, and the preset gap t is less than 0.5 mm. The pre-fixation in this embodiment is used to pre-fix the first end 31 and the second end 32 so that the gap t between the two is less than 0.5 mm.

[0135] Take the fin 2, pass the pre-fixed plate through the first hole of the fin 2, and fix the pre-fixed plate to the fin 2; in this step, when the pre-fixed circumferentially unclosed heat exchange tube 3 is fixed to the fin 2, the relative position of the two can be limited, reducing the risk of relative movement between the two during welding and affecting the welding reliability.

[0136] The pre-fixed plate is welded to the fin 2, and the two ends of the pre-fixed plate are welded along the circumferential direction.

[0137] The fin 2 may be provided with a flange (not shown in the figure) around the first hole, and the flange is convenient for welding with the pre-fixed plate and improves the welding reliability of the two.

[0138] In a specific embodiment, the weld length when the heat exchange tube 1 and the fin 2 are welded can be greater than half the circumference of the heat exchange tube, thereby improving the welding reliability of the heat exchange tube 1 and the fin 2 and enhancing the heat exchange efficiency.

[0139] In this embodiment, when the preset gap between the first end 31 and the second end 32 of the circumferentially unsealed heat exchange tube 3 after pre-fixation is less than 0.5 mm, during the welding process, the gap between the first end 31 and the second end 32 is small, and the brazing layer enters the preset gap under capillary action, thereby fully filling the preset gap and improving the welding reliability of the first end 31 and the second end 32. In this embodiment, the first end 31 and the second end 32 of the circumferentially unfixed heat exchange tube 3 are welded simultaneously with the welding of the fin 2, thereby eliminating the need for multiple welding operations and improving processing efficiency.

[0140] In addition, when processing the heat exchanger, the heat exchange tube 1 is passed through the first hole of the fin 2 and the two are connected by welding. The heat exchange tube and the fin are no longer connected by a method that may cause mechanical wear, such as expansion tubes, thereby reducing the risk of damage to the internal structure of the heat exchange tube 1 and resulting in a decrease in heat exchange performance on the heat exchange medium side. When the heat exchange tube 1 and the fin 2 are welded, there is no gap or a very small gap between the outer wall of the heat exchange tube 1 and the first hole of the fin 2, thereby reducing the thermal resistance of the heat exchanger, improving the heat exchange efficiency between the gas in the air duct and the heat exchange medium in the circulation channel 11 of the heat exchange tube 1, and improving the heat exchange efficiency of the heat exchanger on the air side. In addition, the processing method of the heat exchanger in the embodiment of the present application can also improve processing efficiency and reduce processing costs.

[0141] Among them, compared with the processing method described above in which the plate is bent and then metallurgically combined to form a heat exchange tube and then welded to the fins, in this embodiment, the circumferentially unclosed heat exchange tube is welded to the fin to be circumferentially closed, which can also save at least one welding step, thereby further improving the processing efficiency of the heat exchanger.

[0142] In actual production, after the unsealed heat exchange tube 3 is pre-fixed with the fin 2, before welding, the two ends of the unsealed heat exchange tube 3 are inserted into the header 4, assembled, and welded together to complete the circumferential sealing of the circumferentially unsealed heat exchange tube 3, the welding of the heat exchange tube 1 and the fin 2, and the welding of the header 4 and the heat exchange tube 1. Optionally, the welding method is brazing. As shown in Figures 17 and 18, the first end 31 and the second end 32 of the circumferentially unsealed heat exchange tube 3 in this embodiment are distributed radially, and the first end 31 and the second end 32 are welded to form a circumferentially closed heat exchange tube. The tube wall 12 of the heat exchange tube 1 can also be provided with a protrusion structure, which serves as the flow spoiler 13 of the heat exchange tube 1.

[0143] As shown in Figures 19 and 20, the first end 31 and second end 32 of the circumferentially unsealed heat exchange tube 3 in this embodiment are located outside the circumferentially unsealed heat exchange tube 3. Furthermore, the first end 31 and second end 32 are located outside the heat exchange tube 1. This structure facilitates welding of the first end 31 and second end 32, improving processing efficiency. Furthermore, in this embodiment, the tube wall 12 of the heat exchange tube 1 may also be provided with a protrusion, which serves as the flow disruptor 13 of the heat exchange tube 1.

[0144] In a specific embodiment, after the plate is bent to form the circumferentially unsealed heat exchange tube 3 , the circumferentially unsealed heat exchange tube 3 may be cut to meet usage requirements.

[0145] In a specific embodiment, the bent plate can be pre-fixed by pre-fixing the bent plate with a clamp, that is, the clamp is put on the outside of the circumferentially unclosed heat exchange tube 3 so that the above-mentioned preset gap t is present between the first end 31 and the second end 32.

[0146] In another specific embodiment, pre-fixing the bent plate can also be: pre-fixing the bent plate by pressing, that is, pressing the circumferentially unclosed heat exchange tube 3 so that the above-mentioned preset gap t is present between the first end 31 and the second end 32.

[0147] In another specific embodiment, pre-fixing the bent plate may also be: pre-fixing the two ends of the bent plate along the circumferential direction by spot welding, that is, spot welding the first end 31 and the second end 32 .

[0148] In another specific embodiment, the bent plate can also be pre-fixed by pressing and pre-fixing the plate from the inner side during the plate bending process, that is, applying pressure to the plate from the inner side during the plate bending process so that the above-mentioned preset gap t is formed between the first end 31 and the second end 32 of the circumferentially unclosed heat exchange tube 3 formed after bending.

[0149] Of course, the embodiments of the present application may also adopt other pre-fixing methods, and the present application does not limit this.

[0150] In a specific embodiment, before bending the plate, the processing method of the heat exchanger may further include the following steps: stamping or rolling the plate surface to form a protrusion. The protrusion may be any of the protrusions described in any of the above embodiments, such as a spiral, a thread, a truncated cone, a hemispherical shape, etc. During the bending process of the plate, the plate is bent toward the side where the protrusion is provided. After the bent plate is circumferentially sealed to form the heat exchange tube 1, the protrusion on the plate surface forms a spoiler 13. In this embodiment, the spoiler 13 is integrally formed with the tube wall 12 of the heat exchange tube 1 (integrated by stamping or rolling). The spoiler 13 in this embodiment may have the structure shown in Figures 5-8.

[0151] In this embodiment, the method of machining protrusions on the surface of the plate-like structure is easy to implement and has high machining efficiency, thereby improving the machining efficiency of the heat exchanger and reducing machining costs. Furthermore, this machining method can conveniently produce protrusions of various shapes according to actual needs, thereby forming the desired shape of the flow spoiler 13 within the heat exchange tube 1, thereby improving the heat exchange efficiency of the heat exchanger.

[0152] In another specific embodiment, after bending the sheet material to form the circumferentially open heat exchange tube 3, the processing method may further include the following step: internally spinning the bent sheet material to form a protrusion, that is, forming a protrusion inside the circumferentially open heat exchange tube 3 through internal spinning. In this embodiment, the flow spoiler 13 is integrally formed with the tube wall 12 of the heat exchange tube 1 (integrated through internal spinning). The flow spoiler 13 in this embodiment can have the structure shown in Figures 5-8.

[0153] In another specific embodiment, when the plate is bent, a spoiler 13 is also formed inside the plate. The spoiler may be a structure as shown in Figures 21-24.

[0154] In a specific embodiment, the plate may be a single piece, and the single piece of profile is bent to form the tube wall 12 and the flow spoiler 13 of the heat exchange tube 1 . In this case, the tube wall 12 and the flow spoiler 13 are integrally formed.

[0155] In the embodiments shown in Figures 21 and 22, the first end 31 and the second end 32 of the circumferentially unsealed heat exchange tube 3 are both located inside the circumferentially unsealed heat exchange tube 3. After welding, the first end 31 and the second end 32 form a flow spoiler. The flow spoiler in this embodiment is a structure that protrudes from the wall of the heat exchange tube 1 toward the interior of the heat exchange tube 1.

[0156] In the embodiments shown in Figures 23 and 24, the plate is bent multiple times to form a structure with a spiral cross-section. After the first end 31 and the second end 32 of the circumferentially unclosed heat exchange tube 3 are welded, a flow disruptor with a spiral cross-section is formed in the heat exchange tube 1.

[0157] In other embodiments, the spoiler formed by bending the plate may also have a structure as shown in Figures 9 to 15. This application does not limit the shape of the spoiler formed by bending the plate.

[0158] In another specific embodiment, the plate can be multiple pieces, and one piece of profile is bent to form the tube wall 12, and one or more pieces of profile are bent to form the spoiler 13. At this time, the tube wall 12 and the spoiler 13 are fixedly connected, and the fixed connection method between the two can be welding.

[0159] In the above embodiments, the combined length of the circumferentially sealed heat exchange tube 1 is L, the minimum thickness of the plate is d, and L ≥ d / 2. The combined length L is the length of the welded portion along the axis of the heat exchange tube 1. When L ≥ d / 2, the combined length of the first end 31 and the second end 32 of the circumferentially unsealed heat exchange tube 3 is greater, resulting in a more reliable bond that meets the burst pressure requirements of the heat exchanger and reduces stress concentration at the welded portion, thereby improving the reliability and lifespan of the heat exchange tube 1.

[0160] In addition, in the above embodiments, after the heat exchange tubes 1 and the fins 2 are welded, the heat exchanger may be bent.

[0161] In a specific embodiment, the heat exchanger described in the above embodiments can be manufactured by the heat exchanger processing method described above.

[0162] The above description is only a specific implementation of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited to this. Any changes or replacements within the technical scope disclosed in the embodiment of the present application should be covered by the protection scope of the present application.

[0163] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "longitudinal", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0164] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0165] In this disclosure, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication between them; direct connections or indirect connections through an intermediate medium; and internal communication between two elements or interaction between two elements, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0166] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0167] In the present disclosure, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0168] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present disclosure.

Claims

1. A heat exchanger, comprising: Fins, wherein the fins include a first hole; A heat exchange tube, wherein the heat exchange tube includes a tube wall and a turbulator, and the turbulator is located inside the heat exchange tube; The heat exchange tube penetrates through the first hole and is connected to the fins; The heat exchange tube further includes at least one flow channel, and the wall enclosing the flow channel includes at least part of the tube wall and at least part of the turbulator; The tube wall includes a first layer and a second layer, the second layer includes a solder layer, and along the thickness direction of the tube wall, at least one side of the first layer is connected to the second layer.

2. The heat exchanger according to claim 1, wherein, There is one flow channel, and the turbulator is integrally formed with the tube wall.

3. The heat exchanger according to claim 1, wherein, There are at least two flow channels, the turbulator is integrally formed with the tube wall, or the turbulator is fixedly connected to the tube wall.

4. The heat exchanger according to claim 3, wherein, There is the solder layer inside the heat exchange tube on the tube wall, and / or there is the solder layer inside the heat exchange tube on the turbulator, and the turbulator is connected to the tube wall through the solder layer.

5. The heat exchanger according to any one of claims 2-4, wherein, The tube wall and / or the turbulator has a convex structure, and the convex structure is located inside the heat exchange tube.

6. The heat exchanger according to claim 5, wherein, The turbulator is a convex on the tube wall, and the height of the convex is less than or equal to 1 / 2 of the diameter of the heat exchange tube.

7. A processing method of a heat exchanger, comprising: Taking a sheet; Bending the sheet; Performing metallurgical bonding on the bent sheet to form a circumferentially closed heat exchange tube; Taking fins and passing the heat exchange tube through the first hole of the fins; Welding the heat exchange tube and the fins.

8. The processing method of the heat exchanger according to claim 7, wherein, When performing metallurgical bonding on the bent sheet to form a circumferentially closed heat exchange tube, the processing method includes: High-frequency welding the bent sheet, or spin-sealing the bent sheet, or pressure-processing and sealing the bent sheet.

9. A processing method of a heat exchanger, comprising: Taking a sheet; Bending and pre-fixing the sheet; There is a preset gap t between the two ends of the pre-fixed sheet along the circumference, and the preset gap t is less than 0.5 mm; Taking fins and passing the pre-fixed sheet through the first hole of the fins; Welding the pre-fixed sheet and the fins, and welding the two ends of the pre-fixed sheet along the circumference.

10. The processing method of the heat exchanger according to claim 9, wherein, When pre-fixing the bent sheet, the processing method includes: Pre-fixing the bent sheet through a clamp, or pre-fixing the bent sheet through pressing, or pre-fixing the two ends of the bent sheet along the circumference through spot welding, or pressing and pre-fixing from the inner side of the sheet during the bending process of the sheet.

11. The processing method of the heat exchanger according to any one of claims 7-10, wherein, Before bending the sheet, the processing method further includes: stamping or rolling a convex on the surface of the sheet; or After bending the sheet, the processing method further includes: spin-forming a convex inside the bent sheet.

12. The processing method of the heat exchanger according to any one of claims 7-10, wherein, 13. The processing method of the heat exchanger according to any one of claims 7-10, wherein, When bending the sheet, a turbulator is formed inside the sheet. The bonding length of the circumferentially closed heat exchange tube is L, and the minimum thickness of the sheet is d, and L≥d / 2.

Images