Heat exchanger and heating device
The heat exchanger, which integrates the fins and flow channel through an extrusion process, solves the problems of weak welded fin connection strength and a large number of parts, achieving efficient heat transfer and a simplified assembly process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE HAIER WATER HEATER CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-08-04
AI Technical Summary
The heat exchangers in existing gas water heaters and gas boilers have low heat transfer efficiency due to the weak welded connection between the fins and tubes, resulting in high thermal resistance. They also have a large number of parts and low assembly efficiency.
The fins and flow channel are integrally formed by extrusion, eliminating welding and enhancing connection strength. The multiple flow paths within the flow channel simplify the structure and reduce the number of parts.
The connection strength between the fins and the flow channel is improved, the thermal resistance is reduced, the structure is simplified, the number of parts is reduced, and the heat exchange efficiency and assembly efficiency are improved.
Smart Images
Figure CN224593791U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchange technology, and in particular to a heat exchanger and heating equipment. Background Technology
[0002] Heat exchangers in gas water heaters and gas boilers are typically finned tubes. The fins are formed using a stamping process and then assembled and welded to the tube assembly. Manufacturing a heat exchanger involves multiple steps, including stamping the fins and welding them to the tube assembly. This process is complex, and the welded or spliced joints have relatively weak mechanical strength, making them prone to loosening or breakage under high temperature, high pressure, or mechanical vibration. More importantly, this connection method generates significant thermal resistance between the fins and the tube assembly, leading to reduced heat transfer efficiency.
[0003] In addition, heat exchangers are generally equipped with multiple finned tubes. After the multiple finned tubes are connected to the end plate and fixed in position, multiple finned heat exchange tubes need to be prepared and then assembled. The number of parts is large and the assembly efficiency is low. Utility Model Content
[0004] The purpose of this invention is to provide a heat exchanger and heating equipment that can solve the problems of high thermal resistance of welded fins, large number of parts, and low assembly efficiency.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A heat exchanger, comprising:
[0007] The flow channel section contains multiple parallel flow paths.
[0008] Multiple fins are arranged in parallel and spaced apart. The fins are connected to the flow channel portion, and the fins and the flow channel portion are formed by an extrusion process.
[0009] As an alternative to the aforementioned heat exchanger, the fins are parallel to the extension direction of the flow path, and the flow path is integrally formed with the flow channel portion through an extrusion process.
[0010] As an alternative to the aforementioned heat exchanger, the fins are arranged at an angle to the extension direction of the flow path, and the flow path is formed by machining.
[0011] As an alternative to the aforementioned heat exchanger, the flow channel section includes:
[0012] A plate, wherein the fins are connected to one side surface of the plate;
[0013] A protrusion is provided on the opposite side surface of the plate, and at least a portion of the flow path is located within the protrusion.
[0014] As an alternative to the above-mentioned heat exchanger, multiple protrusions are provided, and each protrusion is correspondingly provided with the flow path;
[0015] And / or, the side surface of the protrusion facing away from the fin is adapted to the inner wall of the flow path.
[0016] As an alternative to the heat exchanger described above, fins are provided on both sides of the flow channel, and the extending directions of the fins on both sides are parallel.
[0017] As an alternative to the above-mentioned heat exchanger, the fins are provided with a first protruding ridge, which extends along the extrusion direction;
[0018] And / or, the inner wall of the flow path is provided with a second protruding ridge, the second protruding ridge extending along the length direction of the flow path;
[0019] And / or, the inner wall of the flow path is provided with a groove, the groove being a through groove, the groove extending along the length direction of the flow path.
[0020] As an alternative to the above-mentioned heat exchanger, the thickness of the fins is 1mm-3mm;
[0021] And / or, the ratio of the height of the fin to the thickness of the fin is 40-50.
[0022] A heating device comprising the heat exchanger described above.
[0023] As an alternative to the above-mentioned heating equipment, it also includes a burner and a fan. The fan is used to drive the flue gas generated by the burner to flow in a preset direction. The heat exchanger is located on the side of the burner away from the fan along the preset direction, and the extension direction of the fins is in the same direction as the preset direction.
[0024] The beneficial effects of this utility model are:
[0025] In the heat exchanger provided by this utility model, the fins and the flow channel are integrally formed by extrusion process, eliminating the need for welding to fix the fins. The connection strength between the fins and the flow channel is high and the thermal resistance is low, which is beneficial to improving heat exchange efficiency. Multiple flow paths are formed in the flow channel, eliminating the need for multiple finned tubes and assembly, which helps to simplify the structure, reduce the number of parts, and reduce assembly costs and time.
[0026] The heating device provided by this utility model uses the above-mentioned heat exchanger, which can solve the problems of high thermal resistance of welded fins, large number of parts, and low assembly efficiency. Attached Figure Description
[0027] Figure 1This is a first structural schematic diagram of the heat exchanger provided in Embodiment 1 of this utility model;
[0028] Figure 2 This is a schematic diagram of the second structure of the heat exchanger provided in Embodiment 1 of this utility model;
[0029] Figure 3 This is a schematic diagram of the first structure of the heat exchanger without the tube assembly provided in Embodiment 1 of this utility model;
[0030] Figure 4 This is a schematic diagram of the second structure of the heat exchanger without the tube assembly provided in Embodiment 1 of this utility model;
[0031] Figure 5 This is a partial structural diagram of the heat exchanger provided in Embodiment 1 of this utility model when the tube assembly is not installed;
[0032] Figure 6 This is a schematic diagram of the heat exchanger provided in Embodiment 2 of this utility model;
[0033] Figure 7 This is a schematic diagram of the structure of the first type of heat exchanger provided in Embodiment 3 of this utility model;
[0034] Figure 8 This is a schematic diagram of the structure of the second type of heat exchanger provided in Embodiment 3 of this utility model.
[0035] In the picture:
[0036] 10. Flow channel; 11. Plate; 12. Protrusion; 13. Flow path; 20. Fin; 21. First protruding ridge; 30. Tube assembly; 31. Pipe joint; 32. Bend. Detailed Implementation
[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0041] Example 1
[0042] This embodiment provides a heat exchanger that can be used in heating equipment to achieve heat exchange function.
[0043] like Figures 1-3 As shown, the heat exchanger includes a flow channel section 10 and multiple fins 20. Multiple parallel flow paths 13 are provided within the flow channel section 10, through which water flows. The multiple fins 20 are arranged in parallel and spaced apart, connected to the flow channel section 10. The fins 20 have a large heat exchange contact area, enabling sufficient heat exchange. The heat from the fins 20 is transferred to the flow channel section 10 to heat the fluid within it. In this embodiment, the heat exchanger is used in a gas water heater as an example. The flow paths 13 are used to introduce water, thereby providing hot water to the user.
[0044] In this embodiment, the fins 20 and the flow channel 10 are formed by extrusion. In this embodiment, the fins 20 and the flow channel 10 are integrally formed by extrusion, eliminating the need for welding to fix the fins 20. The connection strength between the fins 20 and the flow channel 10 is high, and the thermal resistance is low, which is beneficial for improving heat exchange efficiency. Multiple flow paths 13 are formed within the flow channel 10, eliminating the need for multiple finned tubes and assembly, which simplifies the structure, reduces the number of parts, and lowers assembly costs and time.
[0045] In some embodiments, the flow channel 10 has a block structure with a regular shape, which facilitates extrusion molding.
[0046] In some embodiments, such as Figure 1As shown, the heat exchanger also includes a tube assembly 30, which is used to connect multiple flow paths 13 so that the multiple flow paths 13 are connected in series or in parallel to form a heat exchange channel.
[0047] Optionally, the tube assembly 30 includes a pipe joint 31 and a bend 32. The pipe joint 31 serves as the outlet and inlet of the heat exchange channel. Specifically, among the multiple flow paths 13, one end of one flow path 13 is connected to the pipe joint 31 as the inlet of the heat exchange channel; another end of another flow path 13 is connected to the pipe joint 31 as the outlet of the heat exchange channel; and the remaining flow paths 13 are connected through the bend 32, so that the multiple flow paths 13 are connected in series.
[0048] In some embodiments, the tube assembly 30 is welded to the flow channel portion 10 to improve connection strength and sealing.
[0049] In some other embodiments, the pipe assembly 30 and the flow channel 10 may also be fixed in other ways. For example, the pipe joint 31 and the bend 32 in the pipe assembly 30 are connected to the flow channel 10 by snap-fit, and a sealing ring is provided between the pipe joint 31 and the corresponding flow path 13, and between the bend 32 and the corresponding flow path 13, to achieve a seal.
[0050] like Figure 2 As shown, in some embodiments, the flow channel 10 is provided with three flow paths 13, each flow path 13 extending along a first direction X, and the three flow paths 13 are spaced apart along a second direction Y, with the first direction X being perpendicular to the second direction Y. Two flow paths 13 located at both ends along the second direction Y are respectively connected to pipe joints 31, and the pipe joints 31 are located at both ends of the flow path 13 along the first direction X. Four bends 32 are provided, with two bends 32 at each end of the flow channel 10 along the first direction X, and the bends 32 connect two adjacent flow paths 13.
[0051] In some other embodiments, the number of flow paths 13 in the flow channel section 10 can be set according to actual needs.
[0052] In some embodiments, such as Figure 3 As shown, the extension direction of the fin 20 is parallel to that of the flow path 13, and the flow path 13 is integrally formed with the flow channel portion 10 through an extrusion process. By forming the flow channel portion 10 and the fin 20 simultaneously through an extrusion process, the flow path 13 can be formed at the same time, which helps to simplify the processing technology and reduce costs.
[0053] In some embodiments, the flow channel 10 is provided with a plurality of fins 20 along one side of the third direction Z. The plurality of fins 20 are spaced apart, and the gap between two adjacent fins 20 is used for flue gas to pass through, so as to facilitate sufficient contact and heat exchange of the flue gas. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.
[0054] To improve heat exchange efficiency, the flow channel 10 includes a plate 11 and a protrusion 12. Multiple fins 20 are provided on one side of the plate 11 along the third direction Z, and the protrusion 12 is provided on the opposite side of the plate 11 along the third direction Z. At least a portion of the flow path 13 is located within the protrusion 12. This arrangement, on the one hand, by partially accommodating the flow path 13 with the protrusion 12, reduces the maximum size of the plate 11 along the third direction Z, which helps reduce heat transfer loss between the fins 20 and the flow channel 10, facilitates rapid heat transfer from the fins 20 to the flow path 13, and reduces the material usage of the flow channel 10, thus lowering cost and weight. On the other hand, the protrusion 12 protrudes from the plate 11, increasing the surface area of the large flow channel 10, thereby increasing the contact area between the flow channel 10 and the flue gas, which improves the direct heat exchange effect between the flow channel 10 and the flue gas.
[0055] In some embodiments, the number of protrusions 12 is set to be multiple, and the number of protrusions 12 is the same as the number of flow paths 13 and is arranged in a one-to-one correspondence, so that each protrusion 12 is provided with a corresponding flow path 13. This arrangement can reduce the size of the protrusions 12, which is beneficial to reducing costs and the space occupied by the heat exchanger.
[0056] In some other embodiments, only one protrusion 12 may be provided, and multiple flow paths 13 may be provided corresponding to the same protrusion 12.
[0057] In some embodiments, such as Figure 3 and Figure 4 As shown, the side surface of the protrusion 12 facing away from the fin 20 is adapted to the inner wall of the flow path 13, which helps to reduce the thickness of the protrusion 12, facilitates the rapid transfer of heat into the flow path 13, and improves the heat exchange effect.
[0058] It should be noted that the side surface of the protrusion 12 facing away from the fin 20 is adapted to the inner wall of the flow path 13. Specifically, the shape of the side surface of the protrusion 12 facing away from the fin 20 is the same as the shape of the inner wall of the flow path 13, so that the wall thickness of the protrusion 12 is uniform.
[0059] For example, the cross-sectional shape of the flow path 13 is circular, and the surface of the protrusion 12 facing away from the fin 20 is cylindrical, and the axis of the cylindrical surface coincides with the axis of the flow path 13, so that the wall thickness of the protrusion 12 corresponding to the flow path 13 is uniform, which is beneficial to improving the temperature uniformity inside the flow path 13.
[0060] In some other embodiments, the shape of the protrusion 12 can be set according to actual needs.
[0061] In some embodiments, such as Figure 5As shown, the fin 20 includes a first protruding ridge 21 that extends along the extrusion direction to facilitate extrusion molding together with the fin 20, simplifying the processing steps. The first protruding ridge 21 can increase the surface area of the fin 20, thereby improving the heat exchange efficiency by increasing the heat exchange area.
[0062] For example, multiple first protruding ridges 21 are provided, and the multiple first protruding ridges 21 are arranged in parallel and spaced apart to facilitate molding.
[0063] For example, the first ridge 21 extends from one end of the fin 20 to the other end, that is, the length of the first ridge 21 is the same as the length of the fin 20, which is beneficial to increase the heat exchange area.
[0064] In some embodiments, a plurality of first protruding ridges 21 are provided on both sides of the fin 20, and the first protruding ridges 21 on the opposite sides are arranged facing each other or staggered.
[0065] To increase the heat exchange area between the water and the inner wall of the flow path 13, in some embodiments, the inner wall of the flow path 13 is provided with a second protruding ridge, which extends along the length of the flow path 13. By providing the second protruding ridge, the surface area of the flow path 13 is increased, thereby improving the heating efficiency of the water.
[0066] In some embodiments, the inner wall of the flow path 13 is provided with grooves that extend along the length of the flow path 13. By providing grooves, the surface area of the flow path 13 is increased, thereby improving the heating efficiency of the water.
[0067] To facilitate extrusion molding of the flow path 13, the groove is a through groove, and both ends of the groove along the length of the flow path 13 are open structures to facilitate extrusion molding.
[0068] When extruding fins 20, the thickness and height of fins 20 are related to feasibility. The higher the fin 20, the thicker it needs to be to ensure smooth extrusion. Therefore, to meet process and heat exchange requirements, the ratio of fin height to fin thickness is 40-50, preferably 45.
[0069] For example, the ratio of the height of the fin 20 to the thickness of the fin 20 can be 40, 41, 42, 43, 44, 45, 46, 47, 48, 49 or 50.
[0070] To comprehensively consider both the heat exchange area and the feasibility of extrusion molding, in some embodiments, the thickness of the fins 20 can be 1mm-5mm, preferably 1mm-3mm. Within this range, the thickness of the fins 20 ensures both sufficient heat exchange area and the feasibility and quality of extrusion molding.
[0071] For example, the thickness of the fin 20 can be 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4 mm, 4.2 mm, 4.4 mm, 4.6 mm, 4.8 mm, or 5 mm.
[0072] It should be noted that the height of fin 20 refers to the dimension of fin 20 along the third direction Z, and the thickness of fin 20 refers to the dimension of fin 20 along the arrangement direction of multiple fins 20, that is, the dimension of fin 20 along the second direction.
[0073] Example 2
[0074] This embodiment provides a heat exchanger that differs from Embodiment 1 in the direction of the extension of the fins 20.
[0075] like Figure 6 As shown, the fins 20 and the flow paths 13 extend at an angle, and the flow paths 13 are formed by extrusion molding in the flow channel section 10 and then machined. With this arrangement, the fins 20 correspond to multiple flow paths 13, and the heat on the same fin 20 can be transferred to multiple flow paths 13, which is beneficial to improving the uniformity of heat exchange; moreover, the extension direction of the fins 20 can be adjusted according to actual needs to meet the application requirements of different scenarios.
[0076] For example, the flow path 13 is perpendicular to the fin 20. Specifically, the flow path 13 extends along a first direction X, and the fin 20 extends along a second direction Y.
[0077] In some other embodiments, the angle between the extension direction of the flow path 13 and the fin 20 can be an acute angle.
[0078] Example 3
[0079] This embodiment provides a heat exchanger that differs from Embodiment 1 or Embodiment 2 in that fins 20 are provided on both sides of the flow channel 10 to increase the heat exchange area.
[0080] like Figure 7 and Figure 8 As shown, multiple fins 20 are provided on both sides of the flow channel 10 along the third direction Z to increase the number of fins 20 and the total heat exchange area, which is beneficial to improve the heat exchange effect and improve the uniformity of water temperature in the flow path 13.
[0081] In some embodiments, such as Figure 7 As shown, the fins 20 located on both sides of the flow channel 10 are parallel to the extension direction of the flow path 13, so that the fins 20 on both sides, the flow channel 10 and the flow path 13 can be formed together by extrusion process, thereby simplifying the processing process and reducing production costs.
[0082] In other embodiments, such as Figure 8 As shown, the fins 20 located on both sides of the flow channel 10 are set at an angle to the extension direction of the flow path 13. For example, the extension direction of the fins 20 and the flow path 13 is perpendicular, so that the fins 20 on both sides, the flow channel 10 and the flow path 13 can be formed together by extrusion process, thereby simplifying the processing process and reducing production costs.
[0083] It should be noted that the fins 20 located on both sides of the flow channel 10 extend in parallel directions to ensure that they can be integrally formed through the extrusion process.
[0084] Example 4
[0085] This embodiment provides a heating device, which includes a burner and a heat exchanger as described in any of the above embodiments. The burner generates heat when it burns, and the heat exchanger absorbs the heat generated by the burner to heat the water passing through the heat exchanger, thereby providing hot water to the user.
[0086] In this embodiment, the heating device can be a gas water heater. In other embodiments, the heating device can also be a gas boiler, or other devices including a heat exchanger; this is not a limitation.
[0087] Compared to the finned tubes with multiple intervals in the prior art, the flow channel 10 in this embodiment is formed by extrusion process. The flow channel 10 is a solid structure of one piece, which will block the flow of flue gas and thus affect the heat exchange effect.
[0088] To address the aforementioned issues, in some embodiments, the heating device further includes a fan that drives the flue gas generated by the burner to flow in a preset direction. The heat exchanger is located on the side of the burner away from the fan along the preset direction, and the extension direction of the fins 20 is in the same direction as the preset direction.
[0089] Specifically, the fan is located below the burner, with a preset direction from bottom to top. Correspondingly, the heat exchanger is located above the burner, and the fins 20 extend vertically. When the fan blows air upward, the flue gas can flow from one side of the flow channel 10 from bottom to top and through the longitudinal space between two adjacent fins 20, thereby ensuring the fluidity of the flue gas.
[0090] Furthermore, compared to the flow direction of flue gas being set at an angle to the extension direction of flow path 13, when the extension direction of flow path 13 is the same as the extension direction of fin 20, during the flow of flue gas in the gap between two adjacent fins 20, the flow direction of flue gas is in the same direction as the length direction of flow path 13, which is beneficial to improve the temperature uniformity within flow path 13, thereby improving the heat exchange effect.
[0091] For example, when the fin 20 is parallel to the extension direction of the flow path 13, the first direction X extends vertically, and the second direction Y and the third direction Z extend horizontally. At this time, the flow path 13 is vertically arranged, and the fin 20 is parallel to the vertical plane.
[0092] For example, when the fin 20 is perpendicular to the extension direction of the flow path 13, the second direction Y extends vertically, and the first direction X and the third direction Z extend horizontally. At this time, the flow path 13 extends horizontally, and the fin 20 is parallel to the vertical plane.
[0093] The above configuration not only ensures that the flue gas flows from bottom to top through the gap between two adjacent fins 20, but also reduces the overall thickness of the heating equipment in the horizontal direction, allowing the entire unit to be made thinner.
[0094] Optionally, the heating equipment also includes a housing, in which the burner, heat exchanger and fan are all housed.
[0095] To improve space utilization, the flow channel section 10 in the heat exchanger can optionally be located close to the inner wall of the shell. That is, the flow channel section 10 is adjacent to the inner wall of the shell, and the fins 20 are located on the inner wall of the flow channel section 10 away from the shell. This increases the space between the fins 20 and the inner wall of the shell, which facilitates the arrangement of the burner and ensures that the flue gas can pass smoothly through the gap between adjacent fins 20 under the blowing action of the fan.
[0096] In some embodiments, the fan is positioned above the burner with a preset direction from top to bottom. Correspondingly, the heat exchanger is positioned below the burner. The fan blows air so that the flue gas generated by combustion can flow downward to contact the heat exchanger. With the help of the vertically extending fins 20, the flue gas flows downward within the longitudinal space enclosed by two adjacent fins 20, ensuring the fluidity of the flue gas.
[0097] In other embodiments, the heat exchanger and burner can also be arranged in other positions, such as horizontally. As long as the heat exchanger is located in front of the burner along the blowing direction of the fan, and the extension direction of the fins 20 is on the same side as the blowing direction of the fan, it can be ensured that the flue gas can enter the gap between two adjacent fins 20 and flow under the blowing action of the fan, so as to ensure that the flue gas can flow smoothly and exchange heat with the fins 20.
[0098] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A heat exchanger, characterized in that, include: The flow channel section (10) is provided with a plurality of parallel flow paths (13); Multiple fins (20) are arranged in parallel and spaced apart. The fins (20) are connected to the flow channel (10). The fins (20) and the flow channel (10) are formed by an extrusion process.
2. The heat exchanger according to claim 1, characterized in that, The fins (20) are parallel to the extension direction of the flow path (13), and the flow path (13) is integrally formed with the flow channel (10) by an extrusion process.
3. The heat exchanger according to claim 1, characterized in that, The fins (20) are set at an angle to the extension direction of the flow path (13), and the flow path (13) is formed by machining.
4. The heat exchanger according to any one of claims 1-3, characterized in that, The flow channel (10) includes: Plate (11), the fins (20) are connected to one side surface of the plate (11); A protrusion (12) is provided on the opposite side surface of the plate (11), and at least part of the flow path (13) is located within the protrusion (12).
5. The heat exchanger according to claim 4, characterized in that, The protrusions (12) are provided in multiple ways, and each protrusion (12) is provided with a corresponding flow path (13); And / or, the side surface of the protrusion (12) facing away from the fin (20) is adapted to the inner wall of the flow path (13).
6. The heat exchanger according to any one of claims 1-3, characterized in that, The flow channel (10) is provided with fins (20) on both sides, and the extension directions of the fins (20) on both sides are parallel.
7. The heat exchanger according to any one of claims 1-3, characterized in that, The fin (20) is provided with a first protruding ridge (21), which extends along the extrusion direction; And / or, the inner wall of the flow path (13) is provided with a second protruding ridge, the second protruding ridge extending along the length direction of the flow path (13); And / or, the inner wall of the flow path (13) is provided with a groove, the groove being a through groove, the groove extending along the length direction of the flow path (13).
8. The heat exchanger according to any one of claims 1-3, characterized in that, The thickness of the fin (20) is 1mm-3mm; And / or, the ratio of the height of the fin (20) to the thickness of the fin (20) is 40-50.
9. A heating device, characterized in that, Includes the heat exchanger as described in any one of claims 1-8.
10. The heating device according to claim 9, characterized in that, It also includes a burner and a fan, the fan being used to drive the flue gas generated by the burner to flow in a preset direction, the heat exchanger being located on the side of the burner away from the fan along the preset direction, and the extension direction of the fins (20) being in the same direction as the preset direction.