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] The present invention relates to the field of heaters, and in particular to a heater assembly. Background Art

[0002] At present, electric vehicles are developing rapidly, among which the cruising range of electric vehicles is an extremely important indicator for evaluating electric vehicles. Especially when the vehicle is in a low temperature environment, it is necessary to heat the battery and the passenger compartment. In the existing related technologies, the thermal management system of the vehicle mostly uses PTC heaters for heating. For example, the PTC heater is attached to one side of the water chamber with thermal conductive silicone to heat the liquid in the water chamber, and heat transfer is achieved by heat exchange between the liquid and the parts to be heated.

[0003] The inventors found in their research that the heaters in the prior art have at least the following disadvantages:

[0004] The core part of the heater includes a heater core, and the thickness of the heater core is relatively thick, resulting in a larger overall size of the heater. Summary of the invention

[0005] Objects of the present invention include, for example, providing a heater assembly that can reduce the thickness of the heater core, reduce the size, save materials, and reduce costs.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, the present invention 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 accommodating groove and a second accommodating groove which 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 notch of the first accommodating groove, and the lower cover plate closes the notch of the second accommodating groove;

[0009] The heating core comprises a flow channel plate unit and a heating unit, the flow channel plate unit is located in the first accommodating groove, the heating unit is connected to the flow channel plate unit, and is used to heat the flow channel plate unit; the upper cover plate is fixedly connected to a side of the flow channel plate unit away from the second accommodating groove;

[0010] The control circuit board is located in the second accommodating 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 to the integrated housing.

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

[0013] In an optional embodiment, the flow channel plate unit includes a first molding plate, a second molding plate and an inner fin, the first molding plate and the second molding plate are connected and cooperate to form a chamber for medium flow; the inner fin is installed in the chamber, and the inner fin divides the chamber into multiple connected flow channels.

[0014] In an optional embodiment, the flow channel is configured to be wavy, trapezoidal or staggered.

[0015] In an optional embodiment, the electrode sheet includes an integrated bending portion and a strip portion, wherein one end of the bending portion away from the strip portion is connected to the heating unit, and one end of the strip portion away from the bending portion is connected to the control circuit board; an insulating portion is provided on the outer sides of the bending portion and the strip portion.

[0016] In an optional embodiment, the insulating part corresponding to the bending portion is configured as an insulating rubber layer formed around the bending portion using a sealing process; the insulating part corresponding to the strip portion is configured as an insulating sleeve sleeved outside the strip portion; and the insulating rubber layer is connected to the insulating sleeve.

[0017] In an optional embodiment, the number of the flow channel plate units is two, and at least one of the heat generating units is sandwiched between the two flow channel plate units.

[0018] In an optional embodiment, when the number of the heating unit 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 via a thermally curing adhesive film and is located in the second accommodating groove; and 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 communicating with the first accommodating groove and the second accommodating 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 fixed to the flow channel plate unit by welding.

[0022] In an optional embodiment, the heater assembly further includes a detector, which is mounted on the flow channel plate unit and is used to detect whether the flow channel plate unit is leaking or whether external water has entered the first accommodating groove.

[0023] In an optional embodiment, the lower cover plate and the integrated housing are fixedly matched by welding or gluing and pressing.

[0024] The beneficial effects of the embodiments of the present invention include, for example:

[0025] In summary, the heater assembly provided in this embodiment is formed into a whole by directly fixing the upper cover plate to the flow channel plate unit of the heating core. During assembly, the heating core is inserted into the first accommodating groove, and then the upper cover plate is connected to the integrated shell. Thus, the heating core, the upper cover plate and the integrated shell can be assembled. The assembly steps are few and the assembly efficiency is high. At the same time, the upper cover plate not only plays the role of positioning the heating core and the integrated shell, but also can strengthen the top strength of the flow channel plate unit, eliminating the need for a reinforcement plate separately provided on the top of the flow channel plate unit, thereby reducing the thickness of the heating core and the overall size, which is conducive to miniaturization and lightweight design. In addition, since the heating core and the control circuit board share the integrated shell, there is no need to develop a separate set of molds for the heating core, thereby reducing the processing and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of a heater assembly according to an embodiment of the present application;

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

[0029] Figure 3 It is an exploded schematic diagram of a heater assembly according to an embodiment of the present application;

[0030] Figure 4 A schematic diagram of an integrated outer frame according to an embodiment of the present application;

[0031] Figure 5 A schematic diagram of a heating core according to an embodiment of the present application;

[0032] Figure 6Schematic diagram of a flow channel plate unit according to an embodiment of the present application.

[0033] icon:

[0034] 100-integrated housing; 110-shell; 111-clamping groove; 120-partition; 130-first accommodating groove; 140-second accommodating groove; 200-upper cover; 210-plate; 220-annular folding edge; 221-deformation hole; 230-bending section; 231-notch; 300-lower cover; 400-heating core; 410-flow channel plate unit; 411-first molding plate; 412-second molding plate; 413-inner fin; 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 DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0040] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0041] In the prior art, the core part of the heater mainly includes a heater core. The heating core 400 generally includes a core assembly, a shell 110 and a top cover. The cover plate is connected to the shell 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 reinforcement plate is generally provided on the top of the core assembly. The cover plate is fitted with the reinforcement plate to press the core assembly into the shell 110. In this way, the thickness of the heater core is relatively thick, resulting in a larger overall size of the heater.

[0042] In view of this, the designer provides a heater assembly with small thickness, small size, less consumables and low cost.

[0043] Please refer to Figure 1-Figure 6 The present embodiment provides a heater assembly, which includes an integrated housing 100, an upper cover plate 200, a lower cover plate 300, a heating core 400 and a control circuit board 500. The integrated housing 100 is provided with a first accommodating groove 130 and a second accommodating groove 140 which 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 notch of the first accommodating groove 130, and the lower cover plate 300 closes the notch of the second accommodating 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 accommodating groove 130. 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 a side of the flow channel plate unit 410 away from the second accommodating groove 140. The control circuit board 500 is located in the second receiving groove 140 , and the electrode sheet 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 fixing 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 accommodating groove 130, and then the upper cover plate 200 is connected to the integrated shell 100, so that the heating core 400, the upper cover plate 200 and the integrated shell 100 can be assembled, with fewer assembly steps and high assembly efficiency. At the same time, the upper cover plate 200 not only plays a role in positioning the heating core 400 and the integrated shell 100, but also can reinforce the top strength of the flow channel plate unit 410, eliminating the need for a reinforcement plate separately set on the top of the flow channel plate unit 410, thereby reducing the thickness of the heating core 400 and reducing the overall size, which is conducive to miniaturization and lightweight design. In addition, since the heating core 400 and the control circuit board 500 share the integrated shell 100, there is no need to develop a separate set of molds for the heating core 400, which reduces the processing and manufacturing costs.

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

[0047] Please combine Figure 1-Figure 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, and 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 obtain whether there is liquid leakage in the heating core 400 or whether external liquid enters the integrated housing 100. The temperature sensor 700 is used to obtain the real-time temperature of the heating core 400.

[0048] Please combine Figure 2-Figure 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, and the inner cavity has a first opening and a second opening relative to each other. The first opening and the second opening are substantially rectangular openings. The partition 120 is located in the housing 110 and between the first opening and the second opening. The partition 120 separates the inner cavity of the housing 110 into a first accommodating groove 130 and a second accommodating groove 140. The first opening is the notch of the first accommodating groove 130, and the second opening is the notch of the second accommodating groove 140. The outer side of the housing 110 is provided with a snap-fitting groove 111 and an annular groove. The number of the snap-fitting grooves 111 can be multiple, and the multiple snap-fitting grooves 111 are arranged around the first opening. One side of each snap-fitting groove 111 is spaced from the end face where the first opening is located, and the other side is connected to the annular groove. The integrated housing 100 has a simple structure, high overall structural strength, and is manufactured by injection molding, with low cost and high efficiency.

[0049] In addition, the partition plate 120 is provided with a first through hole, a second through hole and an assembly hole. The number of the first through hole, the second through hole and the assembly hole is set as required, and the shape is not limited. The first through hole, the second through hole and the assembly hole are connected to the first accommodating groove 130 and the second accommodating groove 140 at the same time.

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

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

[0052] In addition, in order to make the upper cover plate 200 fit tightly with the first opening, the area enclosed by the annular folding edge 220 is designed as a rectangular opening. In this way, the annular folding edge 220 has four bending sections 230, and a notch 231 is provided at each bending section 230, thereby reducing the stress concentration at the bending section 230 and avoiding the formation of cracks in the annular folding edge 220 at the bending section 230.

[0053] Furthermore, in order to facilitate the deformation of the annular fold 220 and to snap into the snap-in groove 111, a deformation hole 221 is provided on the annular fold 220 at a position corresponding to the snap-in groove 111, so as to weaken the strength of the annular fold 220, make the annular fold 220 easy to deform and not easy to crack, and improve the reliability of the snap-in fit.

[0054] In addition, in order to improve the sealing performance between the upper cover plate 200 and the integrated housing 100, a sealing ring may be provided between the first opening and the upper cover plate 200. At the same time, a portion of the plate body 210 of the upper cover plate 200 may be recessed toward the side of the annular folded edge 220 away from the plate body 210, so that an annular positioning groove is formed between the plate body 210 and the annular folded edge 220, the end where the first opening is located is inserted into the positioning groove, and the sealing ring is positioned in the positioning groove, so that the position is stable and reliable, and the sealing performance is high.

[0055] In this embodiment, optionally, the lower cover plate 300 can be configured as a metal part or a plastic part, and the lower cover plate 300 can be fixedly matched with the integrated housing 100 by laser welding or gluing and pressing.

[0056] Please combine Figure 2 , Figure 5 and Figure 6 In this embodiment, optionally, the heating core 400 includes a flow channel plate unit 410 and a heating unit 420. The number of the flow channel plate units 410 can be multiple, and the multiple flow channel plate units 410 are stacked and arranged at intervals, and at least one heating unit 420 is clamped between adjacent flow channel plate units 410. For example, in some embodiments, the number of the flow channel plate units 410 is two, and at this time, one heating unit 420 is clamped between the two flow channel plate units 410. Or, in other embodiments, the number of the flow channel plate units 410 is three, and one heating unit 420 is clamped between two adjacent flow channel plate units 410. The heating unit 420 can be a heating ceramic sheet or a heating sheet made of a metal composite material. When the number of heating units 420 of two adjacent flow channel plate units 410 is one, the heating power of one heating unit 420 is not less than 5000w, and the overall volume can be reduced by reducing the number of heating units 420. When the heating unit 420 is working, it can convert electrical energy into thermal energy, so as to heat the flow channel plate unit 410 , and further heat 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, and 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 turn and is discharged from the outlet pipe 440.

[0058] It should be understood that each flow channel plate unit 410 may include a first molded plate 411, a second molded plate 412 and an inner fin 413. The first molded plate 411 and the second molded plate 412 are welded and fixed and cooperate to form a chamber for medium flow, and the inner fin 413 is installed in the chamber, and the inner fin 413 divides the chamber into a plurality of connected flow channels. In order to facilitate heat conduction, the first molded plate 411, the second molded plate 412 and the inner fin 413 can all be set as metal parts, so that the plate body 210 of the upper cover plate 200 can also be welded and fixed to the first molded plate 411. It should be understood that the flow channel is set to a wave shape, a trapezoidal shape or a staggered tooth shape, and a window can be opened or not opened on the inner fin 413.

[0059] In addition, the heating unit 420 is clamped between two adjacent flow channel plate units 410. In order to improve the tightness of the heating unit 420 and the flow channel plate unit 410 and improve the heat conduction efficiency, a vacuum glue filling process can be used to fill the gap between the heating unit 420 and the flow channel plate unit 410. Alternatively, a thermally conductive gasket can be set between the heating unit 420 and the flow channel plate unit 410. The thermally conductive gasket also has a buffering effect and can protect the heating unit 420 from being easily damaged.

[0060] It should be understood that in order 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 sheet 421, and is electrically connected to the control circuit board 500 through the electrode sheet 421. The electrode sheet 421 includes a positive electrode sheet and a negative electrode sheet, and the structures of the positive electrode sheet and the negative electrode sheet and the connection method with the control circuit board 500 can be set to be the same. Optionally, the electrode sheet 421 includes an integrated bending portion and a strip portion, and the end of the bending portion away from the strip portion is connected to the heating unit 420, and the end of the strip portion away from the bending portion is connected to the control circuit board 500 after being penetrated through the first through hole, and the outer sides of the bending portion and the strip portion are both provided with an insulating portion to improve the insulation performance. Even when the flow channel plate unit 410 leaks or external water enters the first accommodating groove 130, it is not easy to directly contact the electrode sheet 421, and it is not easy to cause a malfunction. In addition, in order to block the first accommodating groove 130 and the second accommodating groove 140, a sealing layer is provided between the electrode sheet 421 and the hole wall of the first through hole.

[0061] Furthermore, the insulating portion corresponding to the bending portion is provided as an insulating adhesive layer formed around the bending portion by a sealing process. The insulating portion corresponding to the strip portion is provided as an insulating sleeve sleeved outside the strip portion; the insulating adhesive layer is butted against the insulating sleeve, and the insulating portions of different regions of the electrode sheet 421 are formed in different ways for easy processing.

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

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

[0064] Furthermore, a heat conducting plate 800 made of metal material is installed in the assembly hole, and 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 in the heating core 400 can take away the heat of 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 120 by a pressing plate.

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

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

[0067] The heater assembly provided in this embodiment welds the upper cover plate 200 and the uppermost flow channel plate unit 410 of the heating core 400 together. During assembly, the heating core 400 is inserted into the first receiving groove 130, and the upper cover plate 200 is snap-fitted with the integrated housing 100, so that the heating core 400 and the integrated housing 100 can be assembled, and the assembly efficiency is high. In addition, the upper cover plate 200 can play a role in strengthening the structure, and the reinforcing plate between the upper cover plate 200 and the flow channel plate unit 410 can be omitted, thereby reducing consumables, reducing processing and manufacturing costs, and reducing the overall thickness. In addition, since the heating core 400 and the control circuit board 500 share the integrated housing 100, there is no need to develop a separate set of molds for the heating core 400, thereby reducing processing and manufacturing costs.

[0068] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A heater assembly, characterized in that: The invention comprises an integrated housing (100), an upper cover plate (200), a lower cover plate (300), a heating core (400) and a control circuit board (500), wherein: The integrated housing (100) is provided with a first accommodating groove (130) and a second accommodating groove (140) which 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 notch of the first accommodating groove (130), and the lower cover plate (300) closes the notch of the second accommodating groove (140); The heating core (400) comprises a flow channel plate unit (410) and a heating unit (420); the flow channel plate unit (410) is located in the first accommodating groove (130); the heating unit (420) is connected to the flow channel plate unit (410) and is used to heat the flow channel plate unit (410); the upper cover plate (200) is fixedly connected to a side of the flow channel plate unit (410) away from the second accommodating groove (140); The control circuit board (500) is located in the second accommodating groove (140), and the electrode sheet (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 snap-fitted with the integrated housing (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-fitting groove (111); the upper cover plate (200) comprises an integrated plate body (210) and an annular folding edge (220); the plate body (210) closes the notch of the first accommodating groove (130) and is fixedly connected to a side of the flow channel plate unit (410) away from the second accommodating groove (140); the annular folding edge (220) is located around the plate body (210), and the annular folding edge (220) has an inwardly protruding snap-fitting protrusion, and the snap-fitting protrusion is snap-fitted with the snap-fitting groove (111).

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

5. The heater assembly according to claim 4, characterized in that: The flow channel is configured in a wave shape, a trapezoidal shape or a staggered tooth shape.

6. The heater assembly according to claim 1, characterized in that: The electrode sheet (421) comprises an integrated bending portion and a strip portion, wherein one end of the bending portion away from the strip portion is connected to the heating unit (420), and one end of the strip portion away from the bending portion is connected to the control circuit board (500); insulating portions are provided on the outer sides of the bending portion and the strip portion.

7. The heater assembly according to claim 6, characterized in that: The insulating part corresponding to the bending part is arranged as an insulating rubber layer formed around the bending part by a sealing process; the insulating part corresponding to the strip part is arranged as an insulating sleeve sleeved outside the strip part; the insulating rubber layer is butted against the insulating sleeve.

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

9. The heater assembly according to claim 8, characterized in that: When the number of the heating unit (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 to 7, characterized in that: The heater assembly further comprises an IGBT module (600), wherein the IGBT module (600) is fixed to the integrated housing (100) via a thermally cured adhesive film and is located in the second accommodating 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 communicating with the first accommodating groove (130) and the second accommodating 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 to 7, characterized in that: The upper cover plate (200) is fixed to the flow channel plate unit (410) by welding.

13. The heater assembly according to any one of claims 1 to 7, characterized in that: The heater assembly further comprises a detector, which is mounted on the flow channel plate unit (410) and is used to detect whether the flow channel plate unit (410) is leaking or whether external water has entered the first accommodating groove (130).

14. The heater assembly according to any one of claims 1 to 7, characterized in that: The lower cover plate (300) and the integrated housing (100) are fixedly matched by welding or gluing and pressing.

Images