Heater assembly

Abstract

A heater assembly relates to the field of heaters and comprises an integrated shell, an upper cover plate, a lower cover plate, a heating core body and a control circuit board. The integrated shell is provided with a first containing groove and a second containing groove which are independent of each other, the upper cover plate and the lower cover plate are both connected with the integrated shell, a notch of the first containing groove is sealed by the upper cover plate, and a notch of the second containing groove is sealed by the lower cover plate. The heating core body comprises a runner plate unit and a heating unit, the runner plate unit is located in the first containing groove, and the heating unit is connected with the runner plate unit and used for heating the runner plate unit; the upper cover plate is fixedly connected with the side, away from the second containing groove, of the runner plate unit. The control circuit board is located in the second containing groove, and the electrode slice of the heating unit is electrically connected with the control circuit board. The overall structure is compact and the size is small.

Description

Technical Field

[0001] This utility model relates to the field of heaters, and more specifically, to a heater assembly. Background Technology

[0002] Currently, electric vehicles are developing rapidly, and the driving range of electric vehicles is an extremely important indicator for evaluating them. Especially when the vehicle is in a low-temperature environment, it is necessary to heat the battery and passenger compartment. In existing related technologies, most vehicle thermal management systems use PTC heaters for heating. For example, the PTC heater is attached to one side of the water chamber with thermally conductive silicone to heat the liquid in the water chamber, and heat is transferred by exchanging heat between the liquid and the components to be heated.

[0003] The inventors discovered during their research that existing heaters have at least the following drawbacks:

[0004] The core of the heater includes the heater core, which is quite thick, resulting in a large overall size of the heater. Utility Model Content

[0005] The purpose of this invention includes, for example, providing a heater assembly that can reduce the thickness of the heater core, reduce size, save materials, and lower costs.

[0006] The embodiments of this utility model can be implemented as follows:

[0007] In a first aspect, this utility model provides a heater assembly, comprising an integrated housing, an upper cover plate, a lower cover plate, a heating core, and a control circuit board, wherein:

[0008] The integrated housing is provided with a first receiving groove and a second receiving groove that are independent of each other. The upper cover plate and the lower cover plate are both connected to the integrated housing. The upper cover plate closes the opening of the first receiving groove, and the lower cover plate closes the opening of the second receiving groove.

[0009] The heating core includes a flow channel plate unit and a heating unit. The flow channel plate unit is located in the first receiving groove, and the heating unit is connected to the flow channel plate unit for heating the flow channel plate unit. The upper cover plate is fixedly connected to the side of the flow channel plate unit away from the second receiving groove.

[0010] The control circuit board is located in the second receiving groove, and the electrode sheet of the heating unit is electrically connected to the control circuit board.

[0011] In an optional embodiment, the upper cover plate is snap-fitted into the one-piece housing.

[0012] In an optional embodiment, the outer side of the integrated housing is provided with a snap-fit ​​groove; the upper cover plate includes an integrally designed plate body and an annular folded edge, the plate body closes the opening of the first receiving groove and is fixedly connected to the side of the flow channel plate unit away from the second receiving groove; the annular folded edge is located around the plate body, and the annular folded edge has an inwardly protruding snap-fit ​​protrusion, the snap-fit ​​protrusion engaging with the snap-fit ​​groove.

[0013] In an optional embodiment, the flow channel plate unit includes a first forming plate, a second forming plate, and inner fins. The first forming plate and the second forming plate are connected and cooperate to form a chamber for medium flow. The inner fins are installed in the chamber and divide the chamber to form multiple interconnected flow channels.

[0014] In an optional implementation, the flow channel is configured as wavy, trapezoidal, or staggered.

[0015] In an optional embodiment, the electrode sheet includes an integral bent portion and a strip portion. The end of the bent portion away from the strip portion is connected to the heating unit, and the end of the strip portion away from the bent portion is connected to the control circuit board. Insulation portions are provided on the outer sides of both the bent portion and the strip portion.

[0016] In an optional embodiment, the insulating portion corresponding to the bend is configured as an insulating adhesive layer formed around the bend using a sealing process; the insulating portion corresponding to the strip portion is configured as an insulating sleeve fitted over the strip portion; the insulating adhesive layer is mated with the insulating sleeve.

[0017] In an optional embodiment, the number of flow channel plate units is two, with at least one heating unit sandwiched between the two flow channel plate units.

[0018] In an optional implementation, when the number of heating units is one, the heating power of the heating unit is not less than 5000W.

[0019] In an optional embodiment, the heater assembly further includes an IGBT module, which is fixed to the integrated housing by a thermosetting adhesive film and located in the second receiving groove; the IGBT module is electrically connected to the control circuit board.

[0020] In an optional embodiment, the integrated housing is provided with an assembly hole that connects the first receiving groove and the second receiving groove, a heat-conducting plate is installed in the assembly hole, and the IGBT module is attached to the heat-conducting plate.

[0021] In an optional embodiment, the upper cover plate is welded and fixed to the flow channel plate unit.

[0022] In an optional embodiment, the heater assembly further includes a detector mounted on the flow channel plate unit for detecting whether the flow channel plate unit leaks water or whether external water enters the first receiving groove.

[0023] In an optional embodiment, the lower cover plate and the integrated housing are fixed together by welding or pressing with adhesive.

[0024] The beneficial effects of this utility model embodiment include, for example:

[0025] In summary, the heater assembly provided in this embodiment, by directly fixing the upper cover plate to the flow channel plate unit of the heating core, forms a whole. During assembly, the heating core is inserted into the first receiving groove, and then the upper cover plate is connected to the integrated shell, thus realizing the assembly of the heating core, upper cover plate, and integrated shell. This reduces assembly steps and increases assembly efficiency. Simultaneously, the upper cover plate not only positions the heating core and integrated shell but also reinforces the top strength of the flow channel plate unit, eliminating the need for a separate reinforcing plate on the top of the flow channel plate unit. This reduces the thickness of the heating core and the overall size, facilitating miniaturization and lightweight design. Furthermore, since the heating core and control circuit board share the same integrated shell, there is no need to develop a separate mold for the heating core, reducing manufacturing costs. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the heater assembly according to an embodiment of this application;

[0028] Figure 2 This is a cross-sectional schematic diagram of the heater assembly according to an embodiment of this application;

[0029] Figure 3 This is an exploded view of the heater assembly according to an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the integrated outer frame according to an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the heating core according to an embodiment of this application;

[0032] Figure 6This is a schematic diagram of the flow channel plate unit according to an embodiment of this application.

[0033] icon:

[0034] 100 - Integrated housing; 110 - Housing; 111 - Snap-fit ​​groove; 120 - Partition; 130 - First receiving groove; 140 - Second receiving groove; 200 - Top cover plate; 210 - Plate body; 220 - Annular folded edge; 221 - Deformation hole; 230 - Bending section; 231 - Notch; 300 - Bottom cover plate; 400 - Heating core; 410 - Flow channel plate unit; 411 - First forming plate; 412 - Second forming plate; 413 - Inner fins; 420 - Heating unit; 421 - Electrode sheet; 430 - Water inlet pipe; 440 - Water outlet pipe; 500 - Control circuit board; 600 - IGBT module; 700 - Temperature sensor; 800 - Heat-conducting plate. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use, they are only for the convenience of describing this utility model 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 utility model.

[0039] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0040] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0041] In the prior art, the core part of the heater mainly includes the heater core. The heating core 400 generally includes a core assembly, a housing 110, and a top cover. The top cover is connected to the housing 110 to form a closed space, and the core assembly is placed in the space. In order to ensure the strength of the core assembly, a reinforcing plate is generally provided on the top of the core assembly. The top cover is attached to the reinforcing plate to press the core assembly tightly into the housing 110. As a result, the thickness of the heater core is relatively thick, which leads to a large overall size of the heater.

[0042] In view of this, the designers have provided a heater assembly that is thin, small in size, requires less material, and is low in cost.

[0043] Please refer to Figures 1-6 This embodiment provides a heater assembly, which includes an integral housing 100, an upper cover plate 200, a lower cover plate 300, a heating core 400, and a control circuit board 500. The integral housing 100 is provided with a first receiving groove 130 and a second receiving groove 140 that are independent of each other. The upper cover plate 200 and the lower cover plate 300 are both connected to the integral housing 100. The upper cover plate 200 closes the opening of the first receiving groove 130, and the lower cover plate 300 closes the opening of the second receiving groove 140. The heating core 400 includes a flow channel plate unit 410 and a heating unit 420. The flow channel plate unit 410 is located in the first receiving groove 130, and the heating unit 420 is connected to the flow channel plate unit 410 for heating the flow channel plate unit 410. The upper cover plate 200 is fixedly connected to the side of the flow channel plate unit 410 away from the second receiving groove 140. The control circuit board 500 is located in the second receiving groove 140, and the electrode plate 421 of the heating unit 420 is electrically connected to the control circuit board 500.

[0044] As described above, the heater assembly provided in this embodiment has at least the following advantages:

[0045] By directly connecting the upper cover plate 200 to the flow channel plate unit 410 of the heating core 400, the two form a whole. During assembly, the heating core 400 is inserted into the first receiving groove 130, and then the upper cover plate 200 is connected to the integrated housing 100. This allows for the assembly of the heating core 400, the upper cover plate 200, and the integrated housing 100, resulting in fewer assembly steps and higher assembly efficiency. Simultaneously, the upper cover plate 200 not only positions the heating core 400 and the integrated housing 100 but also reinforces the top strength of the flow channel plate unit 410, eliminating the need for a separate reinforcing plate on the top of the flow channel plate unit 410. This reduces the thickness of the heating core 400 and the overall size, facilitating miniaturization and lightweight design. Furthermore, since the heating core 400 and the control circuit board 500 share the integrated housing 100, there is no need to develop a separate mold for the heating core 400, reducing manufacturing costs.

[0046] The following embodiments illustrate the details of the heater assembly of this application by way of example.

[0047] Please combine Figures 1-2 In this embodiment, optionally, the heater assembly includes an integrated housing 100, an upper cover plate 200, a lower cover plate 300, a heating core 400, a control circuit board 500, an IGBT module 600, a detector (not shown), and a temperature sensor 700. The upper cover plate 200 and the lower cover plate 300 are both connected to the integrated housing 100. The heating core 400 is located between the integrated housing 100 and the upper cover plate 200. The control circuit board 500 and the IGBT module 600 are both located between the integrated housing 100 and the lower cover plate 300. The detector is used to detect whether there is liquid leakage in the heating core 400 or whether external liquid has entered the integrated housing 100. The temperature sensor 700 is used to acquire the real-time temperature of the heating core 400.

[0048] Please combine Figures 2-4In this embodiment, optionally, the integrated housing 100 includes an injection-molded housing 110 and a partition 120. The housing 110 has an inner cavity with opposing first and second openings, which are generally rectangular. The partition 120 is located inside the housing 110 and between the first and second openings. The partition 120 divides the inner cavity of the housing 110 into a first receiving groove 130 and a second receiving groove 140. The first opening is the opening of the first receiving groove 130, and the second opening is the opening of the second receiving groove 140. The outer side of the housing 110 is provided with a snap-fit ​​groove 111 and an annular groove. Multiple snap-fit ​​grooves 111 can be arranged around the first opening. Each snap-fit ​​groove 111 has a gap between one side and the end face of the first opening, and the other side connects to the annular groove. The integrated housing 100 has a simple structure, high overall structural strength, and is manufactured using injection molding, resulting in low cost and high efficiency.

[0049] In addition, the partition 120 is provided with a first through hole, a second through hole, and a mounting hole. The number of the first through hole, the second through hole, and the mounting hole are set as needed, and their shapes are not limited. The first through hole, the second through hole, and the mounting hole are all connected to the first receiving groove 130 and the second receiving groove 140.

[0050] Please combine Figure 3 In this embodiment, optionally, the upper cover plate 200 includes an integrally designed plate body 210 and an annular flange 220. When the upper cover plate 200 is connected to the integral housing 100, the plate body 210 closes the opening of the first receiving groove 130 and is welded and fixed to the side of the flow channel plate unit 410 away from the second receiving groove 140. The annular flange 220 is located around the plate body 210 and has an inwardly protruding snap-fit ​​protrusion that engages with the snap-fit ​​groove 111. In actual processing, the snap-fit ​​protrusion can be made not directly on the annular flange 220, but by applying force to the annular flange 220, the annular flange 220 is recessed into the snap-fit ​​groove 111 at the position corresponding to the snap-fit ​​groove 111. The recessed area forms a snap-fit ​​protrusion that engages with the snap-fit ​​groove 111, which facilitates assembly.

[0051] It should be understood that the top cover 200 can be made of metal, that is, made of metal material. The top cover 200 has high structural strength and long service life.

[0052] In addition, in order to ensure that the upper cover plate 200 fits tightly with the first opening, the area enclosed by the annular fold 220 is designed as a rectangular opening. Thus, the annular fold 220 has four bending segments 230, and a notch 231 is provided at each bending segment 230 to reduce stress concentration at the bending segment 230 and prevent cracks from forming in the annular fold 220 at the bending segment 230.

[0053] Furthermore, in order to facilitate the deformation of the annular folded edge 220 into the snap-fit ​​groove 111, a deformation hole 221 is provided on the annular folded edge 220 at the position corresponding to the snap-fit ​​groove 111. This weakens the strength of the annular folded edge 220, making it easier to deform and less prone to cracking, thereby improving the reliability of the snap-fit.

[0054] Furthermore, to improve the sealing between the upper cover plate 200 and the integrated housing 100, a sealing ring can be provided between the first opening and the upper cover plate 200. Simultaneously, a portion of the plate body 210 of the upper cover plate 200 can be recessed towards the side of the annular folded edge 220 away from the plate body 210, forming an annular positioning groove between the plate body 210 and the annular folded edge 220. The end containing the first opening is inserted into the positioning groove, and the sealing ring is positioned within the positioning groove, ensuring stable and reliable positioning and high sealing performance.

[0055] In this embodiment, optionally, the lower cover plate 300 can be made of metal or plastic, and the lower cover plate 300 can be fixed to the integrated housing 100 by laser welding or glue pressing.

[0056] Please combine Figure 2 , Figure 5 and Figure 6 In this embodiment, optionally, the heating core 400 includes flow channel plate units 410 and heating units 420. There can be multiple flow channel plate units 410, stacked and spaced apart, with at least one heating unit 420 sandwiched between adjacent flow channel plate units 410. For example, in some embodiments, there are two flow channel plate units 410, in which case one heating unit 420 is sandwiched between the two flow channel plate units 410. Alternatively, in other embodiments, there are three flow channel plate units 410, with one heating unit 420 sandwiched between two adjacent flow channel plate units 410. The heating unit 420 can be a heating element made of heating ceramic sheet or metal composite material. When there is only one heating unit 420 between two adjacent flow channel plate units 410, the heating power of one heating unit 420 is not less than 5000W. Reducing the number of heating units 420 can reduce the overall volume. When the heating unit 420 is working, it can convert electrical energy into heat energy, thereby heating the flow channel plate unit 410 and then heating the medium flowing in the flow channel plate unit 410.

[0057] When there are multiple flow channel plate units 410, two adjacent flow channel plate units 410 are connected. Furthermore, an inlet pipe 430 and an outlet pipe 440 can be arranged on the top flow channel plate unit 410. After the medium enters from the inlet pipe 430, it flows through each flow channel plate unit 410 in sequence and is discharged from the outlet pipe 440.

[0058] It should be understood that each flow channel plate unit 410 may include a first forming plate 411, a second forming plate 412, and an inner fin 413. The first forming plate 411 and the second forming plate 412 are welded together and cooperate to form a chamber for medium flow. The inner fin 413 is installed in the chamber and divides the chamber to form multiple interconnected flow channels. To facilitate heat conduction, the first forming plate 411, the second forming plate 412, and the inner fin 413 can all be made of metal. Thus, the plate body 210 of the upper cover plate 200 can also be welded to the first forming plate 411. It should be understood that the flow channels can be wavy, trapezoidal, or serrated, and windows may or may not be opened on the inner fin 413.

[0059] Furthermore, the heating unit 420 is sandwiched between two adjacent flow channel plate units 410. To improve the tightness of the fit between the heating unit 420 and the flow channel plate unit 410 and to improve the heat conduction efficiency, a vacuum potting process can be used to fill the gap between the heating unit 420 and the flow channel plate unit 410. Alternatively, a thermally conductive pad can be placed between the heating unit 420 and the flow channel plate unit 410. The thermally conductive pad also has a cushioning effect, which can protect the heating unit 420 from damage.

[0060] It should be understood that, to facilitate the electrical connection between the heating unit 420 and the control circuit board 500, the heating unit 420 is provided with an electrode plate 421, which is electrically connected to the control circuit board 500. The electrode plate 421 includes a positive electrode plate and a negative electrode plate, and the structure of the positive electrode plate and the connection method with the control circuit board 500 can be set to be the same. Optionally, the electrode plate 421 includes an integral bent portion and a strip portion. The end of the bent portion away from the strip portion is connected to the heating unit 420, and the end of the strip portion away from the bent portion passes through the first through hole and is connected to the control circuit board 500. Insulating portions are provided on the outer sides of both the bent portion and the strip portion to improve insulation performance. Even if the flow channel plate unit 410 leaks or external water enters the first receiving groove 130, it is not easy to directly contact the electrode plate 421, thus reducing the risk of malfunction. In addition, to block the first receiving groove 130 and the second receiving groove 140, a sealing layer is provided between the electrode plate 421 and the hole wall of the first through hole.

[0061] Furthermore, the insulating portion corresponding to the bend is configured as an insulating adhesive layer formed around the bend using a sealing process. The insulating portion corresponding to the strip portion is configured as an insulating sleeve fitted over the strip portion; the insulating adhesive layer and the insulating sleeve are mated together. The insulating portions in different areas of the electrode sheet 421 are formed in different ways, which facilitates processing.

[0062] In addition, the inner fins 413 can be integrated on the inner side of the first forming plate 411 or the second forming plate 412.

[0063] In this embodiment, optionally, the IGBT module 600 is attached to the partition 120 and located in the second receiving groove 140. The IGBT module 600 is fixed to the partition 120 by a thermosetting adhesive film, and the pins of the IGBT module 600 are electrically connected to the control circuit board 500. The method of fixing the IGBT module 600 to the partition 120 is simple and reliable, and the overall weight is light.

[0064] Furthermore, a heat-conducting plate 800 made of metal is installed inside the mounting hole. The IGBT module 600 is attached to the heat-conducting plate 800. The heat-conducting plate 800 can exchange heat with the heating core 400. That is, the medium flowing inside the heating core 400 can carry away the heat from the heat-conducting plate 800, thereby reducing the heat of the IGBT module 600. In addition, the IGBT module 600 can also be fixed to the partition plate 120 by a pressure plate.

[0065] In this embodiment, optionally, the detector can be installed on the flow channel plate unit 410 to detect whether the flow channel plate unit 410 leaks water or whether external water enters the first receiving groove 130. It can provide a warning when a leak occurs, which is conducive to taking quick measures and reducing the failure rate.

[0066] In this embodiment, optionally, the temperature sensor 700 is installed in the second through hole. The temperature sensor 700 can be attached to the bottom flow channel plate unit 410, and the position of the temperature sensor 700 is below the water outlet pipe 440, so the temperature information obtained is closer to the temperature at which the medium is heated. Furthermore, a sealing layer can be provided between the temperature sensor 700 and the second through hole to improve sealing. The temperature sensor 700 is provided with pins, which are electrically connected to the control circuit board 500.

[0067] The heater assembly provided in this embodiment welds the upper cover plate 200 to the uppermost flow channel plate unit 410 of the heating core 400. During assembly, the heating core 400 is inserted into the first receiving groove 130, and the upper cover plate 200 is snapped into the integrated housing 100, thus achieving high assembly efficiency. Furthermore, the upper cover plate 200 strengthens the structure, eliminating the need for a reinforcing plate between the upper cover plate 200 and the flow channel plate unit 410, reducing material consumption, manufacturing costs, and overall thickness. Moreover, since the heating core 400 and the control circuit board 500 share the integrated housing 100, a separate mold for the heating core 400 is not required, further reducing manufacturing costs.

[0068] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A heater assembly, characterized in that, It includes an integrated housing (100), an upper cover (200), a lower cover (300), a heating core (400), and a control circuit board (500), wherein: The integrated housing (100) is provided with a first receiving groove (130) and a second receiving groove (140) that are independent of each other. The upper cover plate (200) and the lower cover plate (300) are both connected to the integrated housing (100). The upper cover plate (200) closes the opening of the first receiving groove (130), and the lower cover plate (300) closes the opening of the second receiving groove (140). The heating core (400) includes a flow channel plate unit (410) and a heating unit (420). The flow channel plate unit (410) is located in the first receiving groove (130), and the heating unit (420) is connected to the flow channel plate unit (410) for heating the flow channel plate unit (410). The upper cover plate (200) is fixedly connected to the side of the flow channel plate unit (410) away from the second receiving groove (140). The control circuit board (500) is located in the second receiving groove (140), and the electrode plate (421) of the heating unit (420) is electrically connected to the control circuit board (500).

2. The heater assembly according to claim 1, characterized in that: The upper cover plate (200) is engaged with the integrated outer shell (100).

3. The heater assembly according to claim 2, characterized in that: The outer side of the integrated housing (100) is provided with a snap-fit ​​groove (111); the upper cover plate (200) includes an integrally designed plate body (210) and an annular folded edge (220). The plate body (210) closes the opening of the first receiving groove (130) and is fixedly connected to the side of the flow channel plate unit (410) away from the second receiving groove (140). The annular folded edge (220) is located around the plate body (210) and has an inwardly protruding snap-fit ​​protrusion. The snap-fit ​​protrusion engages with the snap-fit ​​groove (111).

4. The heater assembly according to claim 1, characterized in that: The flow channel plate unit (410) includes a first forming plate (411), a second forming plate (412), and an inner fin (413). The first forming plate (411) and the second forming plate (412) are connected and cooperate to form a chamber for medium flow. The inner fin (413) is installed in the chamber and divides the chamber to form multiple interconnected flow channels.

5. The heater assembly according to claim 4, characterized in that: The flow channel is configured as wavy, trapezoidal, or staggered.

6. The heater assembly according to claim 1, characterized in that: The electrode sheet (421) includes an integral bent portion and a strip portion. The end of the bent portion away from the strip portion is connected to the heating unit (420), and the end of the strip portion away from the bent portion is connected to the control circuit board (500). Insulation portions are provided on the outer sides of both the bent portion and the strip portion.

7. The heater assembly according to claim 6, characterized in that: The insulating portion corresponding to the bend is configured as an insulating adhesive layer formed around the bend using a sealing process; the insulating portion corresponding to the strip portion is configured as an insulating sleeve fitted over the strip portion; the insulating adhesive layer and the insulating sleeve are connected.

8. The heater assembly according to any one of claims 1-7, characterized in that: The number of flow channel plate units (410) is two, and at least one of the heating units (420) is sandwiched between the two flow channel plate units (410).

9. The heater assembly according to claim 8, characterized in that: When the number of heating units (420) is one, the heating power of the heating unit (420) is not less than 5000w.

10. The heater assembly according to any one of claims 1-7, characterized in that: The heater assembly also includes an IGBT module (600), which is fixed to the integrated housing (100) by a thermosetting adhesive film and located in the second receiving groove (140); the IGBT module (600) is electrically connected to the control circuit board (500).

11. The heater assembly according to claim 10, characterized in that: The integrated housing (100) is provided with an assembly hole that connects the first receiving groove (130) and the second receiving groove (140). A heat-conducting plate (800) is installed in the assembly hole, and the IGBT module (600) is attached to the heat-conducting plate (800).

12. The heater assembly according to any one of claims 1-7, characterized in that: The upper cover plate (200) is welded and fixed to the flow channel plate unit (410).

13. The heater assembly according to any one of claims 1-7, characterized in that: The heater assembly also includes a detector mounted on the flow channel plate unit (410) for detecting whether the flow channel plate unit (410) leaks water or whether external water enters the first receiving groove (130).

14. The heater assembly according to any one of claims 1-7, characterized in that: The lower cover plate (300) and the integrated outer shell (100) are fixed together by welding or glue pressing.

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