Heat exchanger
By designing the heat exchange tube structure of the first and second sub-sections in the heat exchanger and increasing the thickness at the connection, the problem of heat exchange tube erosion under high-temperature welding was solved, thereby improving the reliability and connection strength of the heat exchanger.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SANHUA(HANGZHOU) MICRO CHANNEL HEAT EXCHANGER CO LTD
- Filing Date
- 2024-12-31
- Publication Date
- 2026-05-19
AI Technical Summary
When existing heat exchangers are welded and processed in high-temperature environments, the heat exchange tubes are prone to corrosion, which can lead to tube wall damage and affect reliability.
Design a heat exchanger in which the heat exchange tube includes a first sub-section and a second sub-section. The radial thickness of the second sub-section is greater than that of the first sub-section, and part of it is located inside the manifold. The connection is made by welding to increase the thickness at the connection point, reduce solder accumulation, and reduce the risk of corrosion.
It improves the reliability of heat exchangers under high-temperature welding processing, reduces the risk of heat exchange tube damage, and enhances connection reliability.
Smart Images
Figure CN224262294U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of heat exchange technology, and more specifically, to a heat exchanger. Background Technology
[0002] In related technologies, heat exchangers include multiple components such as heat exchange tubes, fins, and connecting pipes. The heat exchange tubes and connecting pipes are fixed together by welding. In some designs, to improve the heat exchange efficiency of the heat exchange tubes, turbulence-inducing parts are set on the inner wall of the heat exchange tubes. However, after welding in high-temperature environments, it has been found that the heat exchange tubes of such heat exchangers exhibit corrosion, leading to damage to the tube walls and thus affecting the reliability of the heat exchanger. Utility Model Content
[0003] Therefore, the purpose of this application is to provide a heat exchanger that helps reduce the risk of heat exchange tube corrosion and improves the reliability of the heat exchanger.
[0004] This application discloses a heat exchanger comprising a manifold and a plurality of heat exchange tubes arranged along the length of the manifold, with a gap between adjacent heat exchange tubes along the length of the manifold. Each heat exchange tube includes a first sub-section and a second sub-section, the length of the first sub-section being greater than the length of the second sub-section, at least one end of the first sub-section being connected to the second sub-section, the heat exchanger being connected to the manifold, a portion of the second sub-section being located inside the manifold, and a portion of the second sub-section being located outside the manifold. The first sub-section includes a first body section and a first protrusion, the first body section including a first inner wall section and a first outer wall section radially in the heat exchange tube, the first protrusion including a first root section connected to the first inner wall section, the distance between the first root section and the first outer wall section radially in the heat exchange tube being t1, the second sub-section including a second body section, the second body section including a second inner wall section and a second outer wall section, the distance between the second inner wall section and the second outer wall section radially in the heat exchange tube being t2, wherein t2 is greater than t1.
[0005] According to the heat exchanger proposed in this application, the heat exchanger includes a heat exchange tube and a manifold, which are welded together. The heat exchange tube includes a first sub-section and a second sub-section. At least one side of the first sub-section is connected to the second sub-section. The first sub-section includes a first body section and a first protrusion. The first body section includes a first inner wall section and a first outer wall section. The distance from the root of the first protrusion to the first outer wall section in the radial direction of the heat exchange tube is t1. The second sub-section includes a second inner wall section and a second outer wall section. The distance from the second inner wall section to the second outer wall section in the radial direction of the heat exchange tube is t2, where t2 is greater than t1. Part of the second sub-section is located inside the manifold, and part of the second sub-section is located outside the manifold. When the heat exchanger is processed by high-temperature welding, there is a possibility of excessive weld buildup at the connection between the heat exchange tube and the manifold. However, by increasing the radial thickness of the heat exchange tube section connected to the manifold (i.e., the radial thickness of the second sub-section), it is beneficial to reduce the risk of heat exchange tube damage due to erosion, and thus improve the reliability of the heat exchanger. Attached Figure Description
[0006] Figure 1 This is a schematic diagram of a heat exchanger structure according to an embodiment of this application.
[0007] Figure 2 yes Figure 1 The diagram shows the structure of the heat exchange tubes in the heat exchanger.
[0008] Figure 3 yes Figure 2 The diagram shows a cross-sectional view of the heat exchange tube in the RR direction.
[0009] Figure 4 yes Figure 1 The heat exchanger shown is a schematic cross-sectional view along the AA direction.
[0010] Figure 5 yes Figure 4 A magnified view of section I shown.
[0011] Figure 6 yes Figure 1 The heat exchanger shown is a schematic cross-sectional view along the BB direction.
[0012] Figure 7 yes Figure 6 The enlarged view of section J shown is a schematic diagram.
[0013] Figure 8 This is a schematic diagram of a heat exchanger structure according to another embodiment of this application.
[0014] Figure 9 yes Figure 8 The diagram shows the structure of the heat exchange tubes in the heat exchanger.
[0015] Figure 10 yes Figure 9The diagram shows a cross-sectional view of the heat exchange tube along the SS direction.
[0016] Figure 11 yes Figure 8 The heat exchanger shown is a schematic cross-sectional view in the CC direction.
[0017] Figure 12 yes Figure 11 The enlarged view of section K shown is a schematic diagram.
[0018] Figure 13 yes Figure 1 The heat exchanger shown is a schematic cross-sectional view along the DD direction.
[0019] Figure 14 yes Figure 13 A magnified view of section L shown in the diagram.
[0020] Figure 15 This is a schematic diagram of a heat exchanger structure according to another embodiment of this application.
[0021] Figure 16 yes Figure 15 The diagram shows the structure of the heat exchange tubes in the heat exchanger.
[0022] Figure 17 yes Figure 16 The diagram shows a cross-sectional view of the heat exchange tube in the TT direction.
[0023] Figure 18 yes Figure 15 The heat exchanger shown is a schematic cross-sectional view along the EE direction.
[0024] Figure 19 yes Figure 18 The enlarged view of section M shown is a schematic diagram.
[0025] Figure 20 yes Figure 1 The heat exchanger shown is a schematic cross-sectional view along the FF direction.
[0026] Figure 21 yes Figure 20 The enlarged view of section N in the sectional view shown is a schematic diagram.
[0027] Figure Labels
[0028] Heat exchanger 100,
[0029] Manifold 1, First Channel 11, First Pipe Wall 12
[0030] Heat exchange tube 2, second body part 226;
[0031] The first sub-part 21, the first body part 216, the first cavity 217, the first solder 211, the first protective material 212, the first core material 213, the first protruding teeth 214, the first concave part 215, the first outer wall part 2111, the first inner wall part 2131;
[0032] Second sub-part 22, second body part 226, second cavity 227, second solder 221, second protective material 222, second core material 223, second protrusion 224, second recess 225, second outer wall part 2211, second inner wall part 2231.
[0033] Fin 3. Detailed Implementation
[0034] To better understand the technical solutions of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.
[0035] This application embodiment provides a heat exchanger 100, which includes a plurality of heat exchange tubes 2 and a plurality of manifolds 1. The manifolds 1 and the heat exchange tubes 2 are fixedly connected by welding. A first channel 11 and a second channel 27 are connected. The manifold 1 includes a first pipe wall 12 and has a first channel 11. The heat exchange tubes 2 have a second channel 27, which extends along the length of the heat exchange tubes 2. The plurality of heat exchange tubes 2 extend along the length of the manifold 1. Figure 1 The heat exchanger 100 is arranged in the y-direction (as shown), and there is a gap between two adjacent heat exchange tubes 2 in the length direction of the manifold 1. The heat exchanger 100 also includes a plurality of fins 3, which are arranged in the second direction (as shown). Figure 1 The heat exchange tube 2 is arranged at intervals in the x direction shown. The second direction is perpendicular to the length direction of the manifold 1. A heat exchange tube 2 passes through multiple fins 3 arranged in the second direction. The heat exchange tube 2 and the fins 3 are fixed by welding. The manifold 1 connects the two heat exchange tubes 2 arranged in the length direction of the manifold 1. It can be understood that this application does not make any specific limitation on the structure of the manifold 1. The manifold 1 is only an example for illustration.
[0036] In some embodiments, such as Figures 1 to 7As shown, the heat exchanger 100 includes a heat exchange tube 2 and a manifold 1, which are welded together. The heat exchange tube 2 includes a first sub-section 21 and a second sub-section 22. The length of the first sub-section 21 is greater than the length of the second sub-section 22. The first sub-section 21 has a second sub-section 22 at both ends. The first sub-section 21 and the second sub-section 22 are fixedly connected. The second sub-section 22 is welded to the manifold 1. The first sub-section 21 includes a first body section 216 and a first cavity 217. The wall surrounding the first cavity 217 includes the first body section 216. Part (21) includes a first body part 216 and a first protrusion 214. The first body part 216 includes a first inner wall part 2131 and a first outer wall part 2111 in the radial direction of the heat exchange tube 2. The first protrusion 214 includes a first root part, which is connected to the first inner wall part 2131. The distance between the first root part and the first outer wall part in the radial direction of the heat exchange tube 2 is t1. The second sub-part 22 includes a second body part 226, which includes a second inner wall part 2231 and a second outer wall part 2211. The second inner wall part 2231 and the second outer wall part 2111 are connected in the radial direction of the heat exchange tube 2. The radial distance of the heat exchange tube 211 is t2, where t2 is greater than t1. Part of the second sub-part 22 is located inside the manifold 1, and part of the second sub-part 22 is located outside the manifold (1). Therefore, part of the second sub-part 22 is located in the first channel 11. The radial thickness of the second body part 226 is t2, where t2 is greater than t1. Since the material of the second sub-part 22 is aluminum alloy, and the material of the manifold 1 is also aluminum alloy, in order to improve the connection reliability of the heat exchange tube 2 and the manifold 1, welding is usually used to fix the two together. During the connection process, the solder liquefies, and solder tends to accumulate at the connection between the second sub-part 22 and the manifold 1. The solder is an aluminum alloy containing silicon. As the solder accumulates, the silicon content also increases. At high temperatures, silicon penetrates into the main material, causing changes in the chemical properties of the main material. This increases the fluidity of the main material, resulting in material loss and a reduction in the thickness of the main material. Therefore, increasing the radial thickness of the second sub-part 22 helps reduce the risk of heat exchange tube breakage due to erosion of the second sub-part 22, and improves the reliability of the heat exchange tube 2.
[0037] It is understood here that the main material referred to in this application refers to the material other than the solder layer in the pipe wall material. The main material can be the core material layer, or the collective term for the core material layer and the protective layer. The solder used in the welding process can be the material of the heat exchange tube 2 itself as a composite material, or the material of the manifold 1 itself as a composite material, or the solder can be obtained by adding a welding ring.
[0038] In some embodiments, further, such as Figures 2 to 5As shown, the heat exchange tube 2 includes a first sub-section 21 and a second sub-section 22. The first sub-section 21 is made of aluminum alloy, and the aluminum alloy material of the first sub-section 21 and the second sub-section 22 can be the same. The first tube wall 12 includes a first outer wall section 2111 and a first inner wall section 2131 in the thickness direction of the first tube wall 12. The first outer wall section 2111 is the inner wall section. The first outer wall section 2111 is provided with a plurality of first protrusions 214. The first protrusions 214 are inclined relative to the length direction of the heat exchange tube 2. The plurality of first protrusions 214 are arranged in the length direction of the heat exchange tube 2. A first part 215 is provided between two adjacent first protrusions 214 in the length direction of the heat exchange tube 2. The provision of a plurality of first protrusions 214 is beneficial to improving the turbulence effect of the refrigerant inside the first sub-section 21.
[0039] Specifically, the first body portion 216 includes a first solder 211 and a first core material 213 in the thickness direction of the first body portion 216. The solder layer is located on the outside of the first pipe wall 12, and the first core material 213 is located on the inside of the first pipe wall 12. The first solder 211 melts at high temperature, which helps to weld and fix the first sub-part 21 to the fin 3. The second body portion 226 includes a solder layer and a core material layer in the thickness direction of the second body portion 226. The solder layer is located on the outside of the second body portion 226, and the first core material 213 is located on the inside of the second body portion 226. The solder layer melts at high temperature, which helps to weld and fix the second sub-part 22 to the manifold 1.
[0040] Furthermore, such as Figure 4 and Figure 7 As shown, the first body portion 216 includes a first solder 211, a first protective material 212, and a first core material 213 in the thickness direction of the first body portion 216. The first solder 211 is located on the outside of the first tube wall 12, the first core material 213 is located on the inside of the first tube wall 12, and the first protective material 212 is located between the first solder 211 and the first core material 213. The second body portion 226 includes a second solder 221, a second protective material 222, and a second core material 223 in the thickness direction of the second body portion 226. The second solder 221 is located on the outside of the second body portion 226, the second core material 223 is located on the inside of the second body portion 226, and the second protective material 222 is located between the second solder 221 and the second core material 223. The second protective material 222 is used to reduce the risk of corrosion of the second core material 223.
[0041] The first sub-part 21 includes a first outer wall part 2111 and a first inner wall part 2131 disposed in the thickness direction of the first body part 216. The first outer wall part 2111 is the inner wall part, and the first inner wall part 2131 is the outer wall part. The first outer wall part 2111 is provided with a plurality of first protrusions 214. The first protrusions 214 are inclined relative to the length direction of the heat exchange tube 2. In the circumferential direction of the heat exchange tube 2, there is a first recess 215 between two adjacent first protrusions 214.
[0042] The second sub-part 22 includes a second outer wall portion 2211 and a second inner wall portion 2231 in the thickness direction of the second body portion 226. The second outer wall portion 2211 is the inner wall portion, and the second inner wall portion 2231 is the outer wall portion. The second outer wall portion 2211 is not embossed and has no protrusions. The thickness t2 of the second body portion 226 is greater than the thickness t1 of the first body portion 216. This is beneficial for the heat exchanger 100 to reduce the risk of damage to the second sub-part 22 under high-temperature welding processing and to improve the reliability of the heat exchange tube 2.
[0043] In some embodiments, such as Figure 8 and Figure 14 As shown, the heat exchanger 100 includes multiple heat exchange tubes 2, multiple fins 3, and multiple manifolds 1. The multiple heat exchange tubes 2 are arranged along the length of the manifolds 1, with gaps between adjacent heat exchange tubes 2. The fins 3 have a plate-like structure, and multiple fins 3 are arranged along the length of the heat exchange tubes 2, with gaps between adjacent fins 3. One heat exchange tube 2 passes through in the second direction (…). Figure 1 Multiple fins 3 are arranged at intervals in the X direction (as shown).
[0044] It is understood here that the structure of the heat exchange tube 2 is only for illustrative purposes.
[0045] Specifically, such as Figure 9As shown, the heat exchanger 100 includes a heat exchange tube 2, which is a circular tube with a circular cross-section. The heat exchange tube 2 includes a first sub-section 21 and a second sub-section 22. The length of the first sub-section 21 is greater than the length of the second sub-section 22. The first sub-section 21 has a second sub-section 22 at both ends. The first sub-section 21 and the second sub-section 22 are fixedly connected. The second sub-section 22 is welded to the manifold 1. The first sub-section 21 includes a first body section 216 and has a first cavity 217. The wall surrounding the first cavity 217 includes the first body section 216. The thickness of the first body section 216 in the radial direction of the heat exchange tube is t1. The second sub-part 22 is connected to the manifold 1. The second sub-part 22 includes a second body part 226 and has a second cavity 227. The wall surrounding the second cavity 227 encloses the second body part 226. A portion of the second sub-part 22 is located in the first channel 11. The first sub-part includes a first body part and a first protrusion. The first body part includes a first inner wall part and a first outer wall part in the radial direction of the heat exchange tube. The first protrusion includes a first root part, which is connected to the first inner wall part. The distance between the first root part and the first outer wall part in the radial direction of the heat exchange tube is t1. The second sub-part includes a second body part, which includes a second inner wall part and a second outer wall part. The distance between the second inner wall part and the second outer wall part in the radial direction of the heat exchange tube is t2. The second sub-section 22 is made of aluminum alloy, and the manifold 1 is also made of aluminum alloy. Therefore, in order to improve the connection reliability of the heat exchange tube 2 and the manifold 1, welding is usually used to fix them together. During the high-temperature welding process, the solder is aluminum alloy and liquefies at high temperature. Solder tends to accumulate at the connection between the second sub-section 22 and the manifold 1. The solder is an aluminum alloy containing silicon. As the solder accumulates, the silicon content also increases. At high temperature, silicon penetrates into the main material, causing changes in the chemical properties of the main material. This increases the fluidity of the main material, resulting in material loss and a reduction in the thickness of the main material. Therefore, increasing the thickness of the second sub-section 22 helps reduce the risk of heat exchange tube breakage due to erosion of the second sub-section 22 and improves the reliability of the heat exchange tube 2.
[0046] Specifically, the first body portion 216 includes a first solder 211 and a first core material 213 in the thickness direction of the first body portion 216. The solder 211 layer is located on the outside of the first pipe wall 12, and the first core material 213 is located on the inside of the first pipe wall 12. The solder layer 212 melts at high temperature, which helps to weld and fix the first sub-part 21 to the fin 3. The second body portion 226 includes a solder layer and a core material layer in the thickness direction of the second body portion 226. The first solder 211 is located on the outside of the second body portion 226, and the first core material 213 is located on the inside of the second body portion 226. The solder layer 212 melts at high temperature, which helps to weld and fix the second sub-part 22 to the manifold 1.
[0047] In some embodiments, the length of the second sub-part 22 is W, wherein 5mm≤W≤10mm. Within this length range, it is beneficial to balance the heat exchange capacity and reliability of the heat exchange tube.
[0048] Furthermore, such as Figures 11 to 14 As shown, the first body portion 216 includes a first solder 211, a first protective material 212, and a first core material 213 in the thickness direction of the first body portion 216. The first solder 211 is located on the outer side of the first tube wall 12, the core material 213 layer is located on the inner side of the first tube wall 12, and the protective layer 213 is located between the first solder 211 and the first core material 213. The melting of the first solder 211 at high temperature helps to weld and fix the first sub-part 21 to the fin 3. The second body portion 226 includes a second solder 221, a second protective material 222, and a first core material 213 in the thickness direction of the second body portion 226. The first solder 211 is located on the outside of the second body part 226, the second core material 223 is located on the inside of the second body part 226, and the second protective material 222 is located between the second solder 221 and the second core material 223. The melting of the first solder 211 at high temperature helps the second sub-part 22 to be welded and fixedly connected to the manifold 1. On the cross-section of the first sub-part 21, the tooth height of the first protrusion 214 is h1.
[0049] The first sub-part 21 includes a first outer wall part 2111 and a first inner wall part 2131 disposed in the thickness direction of the first body part 216. The first outer wall part 2111 is the inner wall part, and the first inner wall part 2131 is the outer wall part. The first outer wall part 2111 is provided with a plurality of first protrusions 214. The first protrusions 214 are inclined relative to the length direction of the heat exchange tube 2. In the circumferential direction of the heat exchange tube 2, there is a first recess 215 between two adjacent first protrusions 214.
[0050] The second sub-part 22 includes a second outer wall portion 2211 and a second inner wall portion 2231 in the thickness direction of the second body portion 226. The second outer wall portion 2211 is the inner wall portion, and the second inner wall portion 2231 is the outer wall portion. The second outer wall portion 2211 is provided with a plurality of second protrusions 224. On the cross-section of the second sub-part 22, the tooth height of the second protrusions 224 is h2, and h2 is less than h1. Therefore, the first protrusions 214 are provided inside the first sub-part 21, and the second protrusions 224 are provided inside the second sub-part 22. This is beneficial to improve the overall turbulence of the refrigerant inside the heat exchange tube 2 and improve the heat exchange effect of the heat exchange tube 2.
[0051] It is also understandable that when the second sub-part 22 does not have the second protruding tooth 224, t2 refers to the radial distance of the second sub-part, which is the radial distance between the second inner wall and the second outer wall. When the second sub-part 22 is provided with the second protruding tooth 224, t2 refers to the radial distance between the root of the second protruding tooth 224 and the second outer wall in the heat exchange tube 2.
[0052] In some embodiments, such as Figure 15 and Figure 21 As shown, the heat exchanger 100 includes multiple heat exchange tubes 2, multiple fins 3, and multiple manifolds 1. The multiple heat exchange tubes 2 are arranged along the length of the manifolds 1, with gaps between adjacent heat exchange tubes 2. The fins 3 have a plate-like structure, and multiple fins 3 are arranged along the length of the heat exchange tubes 2, with gaps between adjacent fins 3. One heat exchange tube 2 passes through in the second direction (…). Figure 1 Multiple fins 3 are arranged at intervals in the X direction (as shown).
[0053] Specifically, such as Figure 15 As shown, the heat exchanger 100 includes a heat exchange tube 2, and the heat exchange tube 2 includes a first sub-section 21 and a second sub-section 22. The length of the first sub-section 21 is greater than the length of the second sub-section 22. The first sub-section 21 has a second sub-section 22 at both ends. The first sub-section 21 and the second sub-section 22 are fixedly connected. The second sub-section 22 is welded to the manifold 1. The first sub-section 21 includes a first body section 216 and has a first cavity 217. The wall surrounding the first cavity 217 includes the first body section 216, and the thickness of the first body section 216 is t1. The second sub-part 22 is connected to the manifold 1. The second sub-part 22 includes a second body part 226 and has a second cavity 227. The wall surrounding the second cavity 227 encloses the second body part 226. A portion of the second sub-part 22 is located in the first channel 11. The first sub-part includes a first body part and a first protrusion. The first body part includes a first inner wall part and a first outer wall part in the radial direction of the heat exchange tube. The first protrusion includes a first root part, which is connected to the first inner wall part. The distance between the first root part and the first outer wall part in the radial direction of the heat exchange tube is t1. The second sub-part includes a second body part, which includes a second inner wall part and a second outer wall part. The distance between the second inner wall part and the second outer wall part in the radial direction of the heat exchange tube is t1. The distance is t2. Since the material of the second sub-section 22 is aluminum alloy and the material of the manifold 1 is also aluminum alloy, in order to improve the connection reliability of the heat exchange tube 2 and the manifold 1, welding is usually used to fix the two together. During the high-temperature welding process, the solder liquefies, and the connection between the second sub-section 22 and the manifold 1 is prone to solder accumulation. The solder is an aluminum alloy containing silicon. As the solder accumulates, the silicon content also increases. At high temperature, silicon penetrates into the main material, causing the chemical properties of the main material to change, which makes the fluidity of the core material layer stronger, resulting in material loss of the core material layer and thinning of the core material layer. Therefore, increasing the thickness of the second sub-section 22 is beneficial to reducing the risk of damage to the second sub-section 22 and improving the reliability of the heat exchange tube 2.
[0054] Specifically, the first body portion 216 includes a first solder 211 and a first core material 213 in the thickness direction of the first body portion 216. The first solder 211 is located on the outside of the first tube wall 12, and the second core material 223 is located on the inside of the first tube wall 12. The melting of the first solder 211 at high temperature helps to weld and fix the first sub-part 21 to the fin 3. The second body portion 226 includes a second solder 221 and a second core material 223 in the thickness direction of the second body portion 226. The second solder 221 is located on the outside of the second body portion 226, and the second core material 223 is located on the inside of the second body portion 226. The melting of the solder layer at high temperature helps to weld and fix the second sub-part 22 to the manifold 1.
[0055] Furthermore, such as Figures 11 to 14 As shown, the first body portion 216 includes a first solder 211, a first protective material 212, and a first core material 213 in the thickness direction of the first body portion 216. The first solder 211 is located on the outer side of the first tube wall 12, the first core material 213 is located on the inner side of the first tube wall 12, and the first protective material 212 is located between the first solder 211 and the first core material 213. The first solder 211 melts at high temperature, which helps to weld and fix the first sub-part 21 to the fin 3. The second body portion 226 includes a second solder 221, a second protective material 222, and a first core material 213 in the thickness direction of the second body portion 226. The second solder 221 is located outside the second body portion 226, the second core material 223 is located inside the second body portion 226, and the second protective material 222 is located between the second solder 221 and the second core material 223. The second solder 221 melts at high temperature, which helps to weld and fix the second sub-part 22 to the manifold 1. On the cross-section of the first sub-part 21, in the circumferential direction of the first sub-part 21, the distance between two adjacent first protrusions 214 in the circumferential direction is d1.
[0056] The second sub-part 22 includes a second outer wall portion 2211 and a second inner wall portion 2231 in the thickness direction of the second body portion 226. The second outer wall portion 2211 is the inner wall portion, and the second inner wall portion 2231 is the outer wall portion. The second outer wall portion 2211 is provided with a plurality of second protruding teeth 224. In the cross-section of the second sub-part 22, the tooth height of the second protruding teeth 224 is h. Therefore, a first protruding tooth 214 is provided inside the first sub-part 21, and a second protruding tooth 224 is provided inside the second sub-part 22. In the cross-section of the second sub-part 22, in the circumferential direction of the second sub-part 22, the distance between two adjacent second protruding teeth 224 in the circumferential direction is d2.
[0057] Furthermore, since d2 is greater than d1, the distance between two adjacent second protrusions 224 in the circumferential direction of the second sub-part 22 is large, which prevents the solder from filling the second recess 225 during the welding process. This helps to increase the space between two adjacent second protrusions 224 to accommodate the solder flowing into the port of the second sub-part 22 during the welding process, thereby reducing the risk of the solder filling the second recess 225 and causing an excessive reduction in the diameter of the second sub-part 22.
[0058] In some implementations, such as Figure 1 and Figure 8 As shown, the heat exchanger 100 includes multiple heat exchange tubes 2, multiple fins 3, and multiple manifolds 1. The multiple heat exchange tubes 2 are arranged along the length of the manifolds 1, with gaps between adjacent heat exchange tubes 2. The fins 3 have a plate-like structure, and multiple fins 3 are arranged along the length of the heat exchange tubes 2, with gaps between adjacent fins 3. One heat exchange tube 2 passes through in the second direction (…). Figure 1 Multiple fins 3 are arranged at intervals in the X direction (as shown).
[0059] Specifically, such as Figure 16As shown, the heat exchanger 100 includes a heat exchange tube 2, and the heat exchange tube 2 includes a first sub-section 21 and a second sub-section 22. The length of the first sub-section 21 is greater than the length of the second sub-section 22. The first sub-section 21 has a second sub-section 22 at both ends. The first sub-section 21 and the second sub-section 22 are fixedly connected. The second sub-section 22 is welded to the manifold 1. The first sub-section 21 includes a first body section 216 and has a first cavity 217. The wall surrounding the first cavity 217 includes the first body section 216, and the thickness of the first body section 216 is t1. The second sub-part 22 is connected to the manifold 1. The second sub-part 22 includes a second body part 226 and has a second cavity 227. The wall surrounding the second cavity 227 encloses the second body part 226. A portion of the second sub-part 22 is located in the first channel 11. The first sub-part includes a first body part and a first protrusion. The first body part includes a first inner wall part and a first outer wall part in the radial direction of the heat exchange tube. The first protrusion includes a first root part, which is connected to the first inner wall part. The distance between the first root part and the first outer wall part in the radial direction of the heat exchange tube is t1. The second sub-part includes a second body part, which includes a second inner wall part and a second outer wall part. The distance between the second inner wall part and the second outer wall part in the radial direction of the heat exchange tube is t1. Since the second sub-section 22 is made of aluminum alloy and the manifold 1 is also made of aluminum alloy, welding is usually used to fix the two together in order to improve the connection reliability of the heat exchange tube 2 and the manifold 1. During the high-temperature welding process, the solder liquefies and the connection between the second sub-section 22 and the manifold 1 is prone to solder accumulation. The solder is an aluminum alloy containing silicon. As the solder accumulates, the silicon content also increases. At high temperature, silicon penetrates into the core material layer, causing changes in the chemical properties of the core material layer. This increases the fluidity of the core material layer, resulting in material loss and a reduction in the thickness of the core material layer. Therefore, increasing the thickness of the second sub-section 22 helps reduce the risk of damage to the second sub-section 22 and improves the reliability of the heat exchange tube 2.
[0060] Specifically, the first body portion 216 includes a solder layer and a core material layer in the thickness direction of the first body portion 216. The solder layer is located on the outside of the first pipe wall 12, and the core material layer is located on the inside of the first pipe wall 12. The solder layer melts at high temperature, which helps to weld and fix the first sub-part 21 to the fin 3. The second body portion 226 includes a solder layer and a core material layer in the thickness direction of the second body portion 226. The solder layer is located on the outside of the second body portion 226, and the core material layer is located on the inside of the second body portion 226. The solder layer melts at high temperature, which helps to weld and fix the second sub-part 22 to the manifold 1.
[0061] Furthermore, such as Figures 10 to 17As shown, the first body portion 216 includes a solder layer, a protective layer, and a core material layer in the thickness direction of the first body portion 216. The solder layer is located on the outside of the first pipe wall 12, the core material layer is located on the inside of the first pipe wall 12, and the protective layer is located between the solder layer and the core material layer. The solder layer melts at high temperature, which helps to weld and fix the first sub-part 21 to the fin 3. The second body portion 226 includes a solder layer, a protective layer, and a core material layer in the thickness direction of the second body portion 226. The solder layer is located on the outside of the second body portion 226, the core material layer is located on the inside of the second body portion 226, and the protective layer is located between the solder layer and the core material layer. The solder layer melts at high temperature, which helps to weld and fix the second sub-part 22 to the manifold 1. The protective layer can reduce the risk of corrosion of the core material layer.
[0062] The first sub-part 21 includes a first outer wall portion 2111 and a first inner wall portion 2131 disposed in the thickness direction of the first body portion 216. The first outer wall portion 2111 is the inner wall portion, and the first inner wall portion 2131 is the outer wall portion. The first outer wall portion 2111 is provided with a plurality of first protrusions 214. The first protrusions 214 are inclined relative to the length direction of the heat exchange tube 2. In the circumferential direction of the heat exchange tube 2, a first recess 215 is provided between two adjacent first protrusions 214.
[0063] The second sub-part 22 includes a second outer wall portion 2211 and a second inner wall portion 2231 in the thickness direction of the second body portion 226. The second outer wall portion 2211 is an inner wall portion, and the second inner wall portion 2231 is an outer wall portion. The second outer wall portion 2211 is not embossed and has no protrusions. The second sub-part 22 includes a stepped portion 228 with a stepped surface 2281. The stepped portion 228 includes a stepped wall 2282. The stepped surface 2281 faces the first sub-part 21. The second sub-part 22 includes the second body portion 226 and a second cavity 227. The second cavity 227 includes the first sub-cavity 2271. The second body portion 226 includes the stepped wall 2282. The wall surrounding the first sub-cavity 2271 includes the stepped wall 2282.
[0064] The end of the sub-part 21 is located in the first sub-cavity 2271, and the thickness t2 of the second body part 226 is greater than the thickness t1 of the first body part 216. This is beneficial for the heat exchanger 100 to reduce the risk of damage to the second sub-part 22 under high-temperature welding processing, and to improve the reliability of the heat exchange tube 2.
[0065] In some embodiments, such as Figure 5 , Figure 12 , Figure 19 , Figure 21 As shown, on the cross-section of the first sub-part 21, the outline of the first protrusion 214 includes an arc segment with a radius of curvature of R, where 0.03 < R < 1.5. Within this range, it is beneficial to improve the turbulence effect of the first protrusion 214 on the liquid inside the first sub-part 21.
[0066] In some embodiments, such as Figure 5 , Figure 12 , Figure 19 , Figure 21 As shown, the tip angle of the first protruding tooth 214 is α, where 6°≤α≤15° is within this range, which is beneficial to improving the turbulence effect of the first protruding tooth 214 on the liquid inside the first sub-part 21.
[0067] In some embodiments, Figure 1 , Figure 8 , Figure 15 , Figure 18 As shown, the heat exchanger 100 also includes a plurality of fins 3, which are arranged in the length direction of the heat exchange tube 2. There is a gap between two adjacent fins 3 in the length direction of the heat exchange tube 2. There are multiple heat exchange tubes 2, which are arranged in the length direction of the fins 3. There is a gap between two adjacent heat exchange tubes 2 in the length direction of the fins 3. One heat exchange tube 2 passes through multiple fins 3 in the length direction of the heat exchange tube 2. Adding fins 3 is beneficial to increasing the heat exchange area of the heat exchanger 100.
[0068] Since the heat exchanger 100 disclosed in the embodiments of this application is used in the heat exchange system, the heat exchange tube 2 can be used to reduce the risk of damage to the heat exchanger tube 2 and improve the reliability of the heat exchanger 100. In addition, the heat exchanger 100 using the heat exchanger tube 2 can reduce refrigerant leakage and also improve the reliability of the heat exchange system.
[0069] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0070] 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 indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0071] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0072] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0073] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0074] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present application.
Claims
1. A heat exchanger, characterized in that, The heat exchanger (100) includes a manifold (1) and a plurality of heat exchange tubes (2). The plurality of heat exchange tubes (2) are arranged along the length of the manifold (1). There is a gap between two adjacent heat exchange tubes (2) arranged along the length of the manifold (1). Each heat exchange tube (2) includes a first sub-section (21) and a second sub-section (22). The length of the first sub-section (21) is greater than the length of the second sub-section (22). At least one end of the first sub-section (21) is connected to the second sub-section (22). The heat exchange tubes (2) are welded to the manifold (1). Part of the second sub-section (22) is located inside the manifold (1), and part of the second sub-section (22) is located outside the manifold (1). The first sub-section (21) includes The first body part (216) and the first tooth (214) are a first inner wall part (2131) and a first outer wall part (2111) in the radial direction of the heat exchange tube (2). The first tooth (214) includes a first root part, which is connected to the first inner wall part (2131). The distance between the first root part and the first outer wall part in the radial direction of the heat exchange tube (2) is t1. The second sub-part (22) includes a second body part (226), which includes a second inner wall part (2231) and a second outer wall part (2211). The distance between the second inner wall part (2231) and the second outer wall part (2211) in the radial direction of the heat exchange tube (2) is t2, where t2 is greater than t1.
2. The heat exchanger according to claim 1, characterized in that, Multiple first protrusions (214) are spaced apart in the circumferential direction of the first body part (216). A first recess (215) is provided between two adjacent first protrusions (214) in the length direction of the heat exchange tube (2). The first sub-part includes a cross-section perpendicular to the length direction of the heat exchange tube. In the cross-section of the first sub-part (21), the outline of the first protrusion (214) includes an arc segment with a radius of curvature of R, where 0.03 < R < 1.
5.
3. The heat exchanger according to claim 1, characterized in that, The length of the second sub-part is W, where 5mm ≤ W ≤ 10mm.
4. The heat exchanger according to any one of claims 1 to 3, characterized in that, The second body portion (226) includes a second outer wall portion (2211) and a second inner wall portion (2231) arranged radially on the heat exchange tube (2). The second body portion (226) also includes a second protrusion (224). The second protrusion (224) includes a second root portion, which is connected to the second inner wall portion (2231). A second recess (225) is provided between two adjacent second protrusions (224) in the length direction of the heat exchange tube (2).
5. The heat exchanger according to claim 4, characterized in that, The first sub-part (21) has a cross-section perpendicular to the length direction of the heat exchange tube (2). On the cross-section of the first sub-part (21), the height of the first protrusion (214) is h1. The second sub-part (22) has a cross-section perpendicular to the length direction of the heat exchange tube (2). On the cross-section of the second sub-part (22), the height of the second protrusion (224) is h2, where h1 > h2.
6. The heat exchanger according to claim 4, characterized in that, The first sub-part (21) has a cross-section perpendicular to the length direction of the heat exchange tube (2). On the cross-section of the first sub-part (21), the distance between two adjacent first protrusions (214) on the circumferential direction of the first sub-part (21) and the distance between them on the circumferential direction of the heat exchange tube (2) is d1. The second sub-part (22) has a cross-section perpendicular to the length direction of the heat exchange tube (2). On the cross-section of the second sub-part (22), the distance between two adjacent second protrusions (224) on the circumferential direction of the second sub-part (22) and the distance between them on the circumferential direction of the heat exchange tube (2) is d2, where d2 > d1.
7. The heat exchanger according to claim 2, characterized in that, The tooth tip angle of the first protruding tooth (214) is α, where 6°≤α≤15°.
8. The heat exchanger according to any one of claims 1 to 3, characterized in that, The first body part (216) includes a first solder (211) and a first core material (213). In the circumferential direction of the first sub-part (21), the first solder (211) is located on the outer side of the first core material (213) in the circumferential direction.
9. The heat exchanger according to claim 8, characterized in that, The second body portion (226) includes a second solder (221) and a second core material (223). In the circumferential direction of the second sub-part (22), the first solder (211) is located on at least one side of the second core material (223).
10. The heat exchanger according to claim 9, characterized in that, The first body portion (216) further includes at least one first protective material (212), and the first protective material (212) is located between the first core material (213) and the first solder (211); and / or, the second body portion (226) further includes at least one second protective material (222), and the second protective material (222) is located between the second core material (223) and the second solder (221).