MCH Heater

Abstract

The present application provides an MCH heater, which relates to the field of heating technology. The MCH heater includes a core shell, an MCH heating core and a controller shell. The MCH heating core includes an inlet pipe, an outlet pipe, a fixed end plate, a plurality of flow channel units and an MCH heating unit. The plurality of flow channel units are stacked and arranged, and adjacent flow channel units are connected. The plurality of flow channel units are connected to the inlet pipe and the outlet pipe. The fixed end plate is fixed to the flow channel unit located at the most side of the plurality of flow channel units; the MCH heating unit is arranged between adjacent flow channel units; the core shell and the controller shell are connected and the two together define an equipment cavity, the MCH heating core is arranged in the equipment cavity, the fixed end plate is fixedly connected to the controller shell, and the inlet pipe and the outlet pipe both extend out of the core shell. The heater has a simple structure, is easy to assemble, has high sealing performance, and has high heating efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, in particular to an MCH heater. 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 and other locations. In the existing related technologies, the thermal management system of the vehicle mostly uses a PTC heater for heating. For example, the PTC heater is attached to one side of the water chamber using thermal conductive silicone to heat the liquid in the water chamber, and the heat is transferred by exchanging heat between the liquid and the parts to be heated. Since the PTC heater is arranged on one side of the water chamber, it can only heat one side of the water chamber, with low heating efficiency and high energy consumption, which affects the cruising range of the electric vehicle. Utility Model Content

[0003] The utility model aims to provide an MCH heater, which can improve heating efficiency, reduce energy consumption, and increase the cruising range of electric vehicles.

[0004] The embodiment of the utility model is achieved as follows:

[0005] In a first aspect, the utility model provides an MCH heater, comprising:

[0006] A core shell, an MCH heating core and a controller shell, the MCH heating core comprising an inlet pipe, an outlet pipe, a fixed end plate, a plurality of flow channel units and an MCH heating unit, the plurality of flow channel units are stacked and arranged, adjacent flow channel units are connected, the plurality of flow channel units are all connected to the inlet pipe and the outlet pipe, the fixed end plate is fixed to the flow channel unit located at the edgemost among the plurality of flow channel units; the MCH heating unit is arranged between adjacent flow channel units; the core shell and the controller shell are connected and the two together define an equipment cavity, the MCH heating core is arranged in the equipment cavity, the fixed end plate is fixedly connected to the controller shell, the inlet pipe and the outlet pipe both extend out of the core shell.

[0007] In an optional embodiment, the fixed end plate includes a plate body and a plurality of connecting protrusions arranged on the four edges of the plate body, the plate body is fixedly connected to the flow channel unit located at the edgemost side among the plurality of flow channel units, and the plurality of connecting protrusions are all fixedly connected to the controller housing.

[0008] Based on the above scheme, by setting a plurality of connecting protrusions, the connecting protrusions are protruded on the edge of the plate body and are not blocked by the flow channel unit connected to the plate body. The connecting protrusions are exposed outside the flow channel unit, which makes it easy to connect the connecting protrusions to the controller housing, thereby improving assembly convenience.

[0009] In an optional embodiment, the fixed end plate has a first side and a second side opposite to each other in a first direction, the number of the connecting protrusions is two and they are respectively arranged on the first side and the second side, and the two connecting protrusions have a spacing in a second direction perpendicular to the first direction.

[0010] Based on the above scheme, by reasonably arranging the two connecting protrusions, the strength of the connection structure between the fixed end plate and the controller housing can be made to meet the requirements while reducing the number of connecting protrusions, thereby ensuring safety and reliability during use. The small number of connecting protrusions can simplify the fixed end plate structure and reduce the processing and manufacturing costs.

[0011] In an optional embodiment, the flow channel unit is provided with a first convex portion, the fixed end plate is provided with a first concave portion corresponding to the first convex portion, and the fixed end plate forms a second convex portion at the first concave portion protruding in a direction away from the flow channel unit; a second concave portion is provided on the inner wall surface of the controller housing, and the second convex portion is embedded in the second concave portion.

[0012] Based on the above scheme, a second recess is provided on the controller housing, which can accommodate the second protrusion on the fixed end plate, thereby playing a role in positioning the fixed end plate, which not only improves the firmness of the combination of the fixed end plate and the controller housing, but also improves the assembly efficiency of the fixed end plate and the controller housing.

[0013] In an optional embodiment, a fixing hole is provided on the connecting protrusion, and a fastening bolt is passed through the fixing hole; a threaded hole is provided on the inner wall surface of the controller housing, and the fastening bolt is screwed into the threaded hole.

[0014] Based on the above solution, the fixed end plate is connected to the controller housing by fastening bolts, the connection method is simple and reliable, and the assembly efficiency is high.

[0015] In an optional embodiment, weight-reducing holes are provided on the fixed end plate.

[0016] Based on the above scheme, by providing the weight-reducing holes, the weight of the fixed end plate can be reduced, thereby reducing the weight of the heating core, and can also reduce consumables and reduce the cost of processing and manufacturing.

[0017] In an optional embodiment, a sealing ring is provided between the core shell and the controller housing.

[0018] Based on the above solution, the joint between the core shell and the controller shell is sealed by the sealing ring, and the sealing performance between the core shell and the controller shell is good.

[0019] In an optional embodiment, the core shell is provided with a mating annular surface, the controller housing is provided with a mating surface, at least one of the mating annular surface and the mating surface is provided with an annular positioning groove, and the sealing ring is embedded in the annular positioning groove.

[0020] Based on the above scheme, the sealing ring is embedded in the annular positioning groove, the sealing ring has a good positioning effect, and the installation of the sealing ring is convenient. When the core shell and the controller shell are docked and squeezed to extrude the sealing ring, the deformation range of the sealing ring is limited by the annular positioning groove, and the sealing ring can be deformed within a reasonable range, thereby improving the sealing performance.

[0021] In an optional embodiment, a buckle with a snap hole is provided on one of the core shell and the controller shell, and a countersunk buckle is provided on the other of the core shell and the controller shell, and the snap hole is snap-fitted with the countersunk buckle.

[0022] Based on the above solution, the connection between the core shell and the controller housing is achieved through the cooperation of the snap-fit ​​and undercut structures. The connection structure is simple, easy to process, and easy to operate and assemble.

[0023] In an optional embodiment, the MCH heating core includes two stacked ceramic sheets and a metal wire sintered between the two ceramic sheets.

[0024] Based on the above solution, the MCH heating core has a simple structure and is easy to process and manufacture. The ceramic sheet can be directly attached to the flow channel unit to reduce thermal resistance and improve heating efficiency.

[0025] The beneficial effects of the embodiments of the utility model are:

[0026] In summary, the MCH heater provided in this embodiment has multiple flow channel units stacked and arranged, and an MCH heating core is arranged between two adjacent flow channel units. The thickness of each flow channel unit is small. When the MCH heating core is heated, it can quickly heat the heat exchange medium in each flow channel unit. Moreover, at least one MCH heating core is clamped between adjacent flow channel units. The heat emitted by the MCH heating core can be transferred to the flow channel units on both sides at the same time. The heat of the MCH heating core is not easy to dissipate, the heat utilization rate is high, the heating efficiency is high, and the energy consumption is reduced, thereby increasing the cruising range of the electric vehicle. In addition, the MCH heating core is arranged between the core shell and the controller shell. The MCH heating core is not directly exposed to the external environment, the heat is not easy to dissipate, and it is not easy to be damaged by collision. It has a long service life and low operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of an MCH heater according to an embodiment of the present utility model;

[0029] Figure 2 This is an exploded schematic diagram of an MCH heater according to an embodiment of the present utility model;

[0030] Figure 3 A schematic diagram of a core housing of an embodiment of the utility model;

[0031] Figure 4 A schematic diagram of a controller housing according to an embodiment of the present utility model;

[0032] Figure 5 A schematic diagram of a fixed end plate from one perspective of an embodiment of the utility model;

[0033] Figure 6 A schematic diagram of another perspective of a fixed end plate of an embodiment of the utility model;

[0034] Figure 7 A schematic diagram of an MCH heating core according to an embodiment of the present utility model;

[0035] Figure 8 It is a schematic diagram of a flow channel unit according to an embodiment of the present utility model.

[0036] icon:

[0037] 100-core shell; 110-groove; 120-assembly hole; 130-annular positioning groove; 140-clip; 141-clip hole; 150-boss; 200-MCH heating core; 210-inlet pipe; 220-outlet pipe; 230-fixed end plate; 231-plate body; 232-connecting convex body; 233-first recess; 234-second convex; 235-fixing hole; 236-weight reduction hole; 240-flow channel unit; 241-flow channel plate; 242-first convex; 250-MCH heating unit; 300-controller housing; 310-second recess; 320-undercut; 400-sealing ring. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] 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 present invention to be protected, 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.

[0040] 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.

[0041] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0042] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the prior art, the PTC heating core heats the water chamber, and the heat exchange medium flowing in the water chamber heats the components to be heated. Since multiple layers of thermal conductive glue or thermal conductive pads are generally configured between the PTC heating core and the water chamber, the heat conduction efficiency is low, the heating efficiency is low, and the energy consumption is high.

[0045] In view of this, the designer provides an MCH heater that can reduce thermal resistance, improve heating efficiency, thereby reducing energy consumption and increasing the cruising range of electric vehicles.

[0046] It should be understood that the MCH heater provided in this embodiment is not limited to being used in electric vehicles, but can also be used in other vehicles or mechanical equipment that require heat exchange.

[0047] Please combine Figure 1-Figure 8 In this embodiment, the MCH heater includes a core shell 100, an MCH heating core and a controller shell 300. The MCH heating core 200 includes an inlet pipe 210, an outlet pipe 220, a fixed end plate 230, a plurality of flow channel units 240 and an MCH heating unit 250. The plurality of flow channel units 240 are stacked and arranged, and adjacent flow channel units 240 are connected. The plurality of flow channel units 240 are all connected to the inlet pipe 210 and the outlet pipe 220. The fixed end plate 230 is fixed on the flow channel unit 240 located at the edge among the plurality of flow channel units 240; the MCH heating unit 250 is arranged between adjacent flow channel units 240; the core shell 100 and the controller shell 300 are connected and the two together define a device cavity, the MCH heating core 200 is arranged in the device cavity, the fixed end plate 230 is fixedly connected to the controller shell 300, and the inlet pipe 210 and the outlet pipe 220 both extend out of the core shell 100.

[0048] Based on the above scheme, the working principle of the MCH heater provided in this embodiment is as follows:

[0049] During operation, a heat exchange medium, such as water, is introduced from the water inlet pipe, and the heat exchange medium enters the multi-layer flow channel unit 240, and can flow along a set path in each flow channel unit 240 and then flow out from the water outlet pipe. During the flow of the heat exchange medium, the MCH heating core 200 is energized to convert electrical energy into thermal energy and heat the heat exchange medium in the flow channel unit 240. Since a plurality of flow channel units 240 are stacked and arranged, and an MCH heating core 200 is arranged between two adjacent flow channel units 240, and the thickness of each flow channel unit 240 is small, the MCH heating core 200 can quickly heat the heat exchange medium in each flow channel unit 240 when it is heated, and at least one MCH heating core 200 is clamped between adjacent flow channel units 240, and the heat emitted by the MCH heating core 200 can be simultaneously transferred to the flow channel units 240 on both sides, and the heat of the MCH heating core 200 is not easily lost, the heat utilization rate is high, the heating efficiency is high, and the energy consumption is reduced, thereby increasing the cruising range of the electric vehicle. Furthermore, the MCH heating core 200 is disposed between the core shell 100 and the controller shell 300 , and the MCH heating core 200 is not directly exposed to the external environment, so heat is not easily lost, and it is not easily damaged by collision, so it has a long service life and low operating cost.

[0050] The following embodiments illustrate the details of the MCH heater provided in the present application by way of examples.

[0051] Please combine Figure 1 and Figure 3 In this embodiment, optionally, the core shell 100 has a groove 110 and two assembly holes 120, the groove 110 is a rectangular groove, the two assembly holes 120 both penetrate the groove bottom wall of the groove 110, and the two assembly holes 120 are arranged at intervals. The end surface of the core shell 100 corresponding to the notch of the groove 110 is an assembly annular surface, and an annular positioning groove 130 is arranged on the assembly annular surface. At the same time, a plurality of buckles 140 are arranged around the core shell 100, for example, a total of eight buckles 140 are arranged around the core shell 100, wherein the eight buckles 140 are divided into three groups, namely, two groups of three buckles 140 and one group of two buckles 140, two groups of three buckles 140 are distributed on the length side of the core shell 100, and one group of two buckles 140 is distributed on a width side of the core shell 100, and each buckle 140 is provided with a clamping hole 141. The core housing 100 and the controller housing 300 can be connected by a plurality of buckles 140. At the same time, a boss 150 is provided on the other width side of the core housing 100, and a through hole is provided on the boss 150. A fastening bolt is passed through the through hole, and the core housing 100 can be fixed on the controller housing 300 by the fastening bolt.

[0052] Among them, a sealing ring 400 is placed in the annular positioning groove 130, and the sealing ring 400 can enhance the sealing between the core housing 100 and the controller housing 300. When the core housing 100 and the controller housing 300 are matched, the core housing 100 and the controller housing 300 are close to each other, and the two cooperate to squeeze the sealing ring 400, and the sealing ring 400 can be deformed, thereby sealing the annular mating surface between the core housing 100 and the controller housing 300. Since the sealing ring 400 is limited by the annular positioning groove 130, the position of the sealing ring 400 is stable, and the deformation range is controllable, and the sealing effect is good.

[0053] It should be noted that a plurality of reinforcing ribs arranged in a crisscross pattern may be further provided on the outer wall surface of the core shell 100 to improve the structural strength of the core shell 100 .

[0054] Please combine Figure 1 and Figure 4 In this embodiment, optionally, the controller housing 300 has a mating surface connected to the core shell 100, and a recess is provided on the mating surface. The number of the recesses is consistent with the number of the protrusions on the fixed end plate 230 and the positions are corresponding, which plays a role in positioning the fixed end plate 230. In addition, a threaded hole is provided on the mating surface, and a fastening bolt can be screwed into the threaded hole. The fastening bolt fixes the fixed end plate 230 to the controller housing 300.

[0055] At the same time, undercuts 320 are arranged around the controller housing 300, and the number and arrangement of the undercuts 320 are consistent with the number and arrangement of the buckles 140 on the core housing 100. For example, in this embodiment, the number of undercuts 320 is eight, and each undercut 320 is engaged with a clamping hole 141 on a buckle 140. After the buckle 140 and the undercut 320 are engaged, a fastening bolt is inserted through the through hole of the boss 150 and is screwed and fixed with the threaded hole on the controller housing 300. In this way, the controller housing 300 and the core housing 100 are not only positioned by the cooperation of the buckle 140 and the undercut 320, but also reinforced by the fastening bolt, and the connection structure of the core housing 100 and the controller housing 300 is firm and reliable.

[0056] Please combine Figure 5 and Figure 6In this embodiment, optionally, the fixed end plate 230 can be a rectangular plate, and a strip-shaped weight-reducing hole 236 is provided on the fixed end plate 230, which can save materials and reduce weight. Optionally, the fixed end plate 230 includes a plate body 231 of an integrated structure and a plurality of connecting protrusions 232 arranged on the edges of the plate body 231. For example, in this embodiment, the number of connecting protrusions 232 is two, and the two connecting protrusions 232 are respectively arranged on the two length sides of the fixed end plate 230, and the two connecting bosses 150 are arranged at intervals in the length direction of the fixed end plate 230, and each connecting boss 150 is provided with a fixing hole 235, and the fixing hole 235 is for fastening bolts to pass through. It should be understood that the number of connecting protrusions 232 on the plate body 231 is not limited to two, and can also be adjusted according to the situation, and is not exhaustively listed in this embodiment. In addition, the width direction of the plate body 231 can be a first direction, the length direction of the plate body 231 is a second direction perpendicular to the first direction, and the two connecting bosses 150 are arranged in the first direction and have a spacing in the second direction. In this way, while reducing the number of connecting bosses 232, the firmness of the connection between the fixed end plate 230 and the controller housing 300 can also be ensured.

[0057] Furthermore, a concave-convex structure is formed on the plate body 231 by stretching, so that it can be snap-fitted and positioned with the flow channel unit 240 and can also be snap-fitted and positioned with the controller housing 300.

[0058] Please combine Figure 7 and Figure 8In this embodiment, optionally, the flow channel unit 240 includes two flow channel plates 241 that cooperate with each other and partitions provided in the two flow channel plates 241. The partitions can separate the space in the flow channel plate 241 to form a plurality of flow grooves, which is beneficial for the heat exchange medium to flow in the flow grooves. The flow channel plates 241 of adjacent flow channel units 240 are interconnected, that is, holes are provided on the flow channel plates 241, and adjacent flow channel plates 241 are connected through the positions of the holes. It should be understood that the number of flow channel units 240 is set as needed. For example, in this embodiment, the number of flow channel units 240 is three and they are arranged in a stacked manner, and there is a spacing between each flow channel unit 240 to accommodate the MCH heating core 200. In order to ensure that adjacent flow channel units 240 are connected and form a spacing to accommodate the MCH heating core 200, in this embodiment, each flow channel plate 241 is provided with two first protrusions 242 protruding outwards, and the holes for connecting adjacent flow channel plates 241 are provided at the first protrusions 242. The two flow channel plates 241 of two adjacent flow channel units 240 are connected by docking through the first protrusions 242. However, due to the design of the first protrusions 242, the two adjacent flow channel plates 241 are not completely fitted together, but a spacing is formed for the placement of the MCH heating core 200. At the same time, for the convenience of description, the flow channel unit 240 located at the top layer is the upper unit, and the flow channel unit 240 located at the bottom layer is the lower unit. The inlet pipe 210 and the outlet pipe 220 are both fixedly connected to the flow channel plate 241 of the upper layer of the upper unit, and the fixed end plate 230 is fixedly connected to the flow channel plate 241 of the lower layer of the lower unit. The medium enters from the inlet pipe 210, flows through each flow channel unit 240, and is discharged from the outlet pipe 220. During the flow of the medium, the MCH heating core 200 heats the medium, the temperature of the medium rises, and heat is transferred through the medium. During assembly, the inlet pipe 210 and the outlet pipe 220 are respectively inserted into the two assembly holes 120 on the core shell 100.

[0059] In addition, a first recess 233 is formed on the plate body 231 at a position corresponding to the first protrusion 242 of the lower flow channel plate 241 of the lower unit, and a second protrusion 234 is formed at a position corresponding to the first recess 233. The recess on the controller housing 300 is the second recess 310. In this way, the first protrusion 242 is snapped into the first recess 233, and the second protrusion 234 is snapped into the second recess 310 to achieve accurate positioning, and the first recess 233 can block the hole at the first protrusion 242.

[0060] In this embodiment, optionally, the MCH heating core 200 includes two stacked ceramic sheets and a metal wire sintered between the two ceramic sheets. MCH (Metal Ceramics Heater) refers to a ceramic heating element formed by printing metal tungsten or molybdenum-manganese slurry on a ceramic cast body, laminating through hot pressing, and then sintering ceramic and metal together under the protection of a hydrogen atmosphere. It has the advantages of corrosion resistance, high temperature resistance, long life, high efficiency and energy saving, uniform temperature, good thermal conductivity, fast thermal compensation speed, etc., and does not contain harmful substances such as lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, etc., and meets environmental protection requirements. When the number of flow channel units 240 is three, the number of MCH heating cores 200 is two, and one MCH heating core 200 is clamped between two adjacent flow channel units 240, and the heating efficiency is high.

[0061] The MCH heater provided in this embodiment is easy to assemble, has high heating efficiency, low energy consumption, and can increase the cruising range of electric vehicles.

[0062] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An MCH heater, characterized in that: include: A core shell (100), an MCH heating core and a controller shell (300), wherein the MCH heating core (200) comprises an inlet pipe (210), an outlet pipe (220), a fixed end plate (230), a plurality of flow channel units (240) and an MCH heating unit (250), wherein the plurality of flow channel units (240) are arranged in layers, and adjacent flow channel units (240) are connected, and the plurality of flow channel units (240) are all connected to the inlet pipe (210) and the outlet pipe (220), and the fixed end plate (230) is fixed to the On the flow channel unit (240) located at the edgemost among the multiple flow channel units (240); the MCH heating unit (250) is arranged between the adjacent flow channel units (240); the core shell (100) and the controller shell (300) are connected and the two together define a device cavity, the MCH heating core (200) is arranged in the device cavity, the fixed end plate (230) is fixedly connected to the controller shell (300), and the inlet pipe (210) and the outlet pipe (220) both extend out of the core shell (100).

2. The MCH heater according to claim 1, characterized in that: The fixed end plate (230) comprises a plate body and a plurality of connecting protrusions (232) arranged on the four edges of the plate body, the plate body is fixedly connected to the flow channel unit (240) located at the edgemost side among the plurality of flow channel units (240), and the plurality of connecting protrusions (232) are all fixedly connected to the controller housing (300).

3. The MCH heater according to claim 2, characterized in that: The fixed end plate (230) has a first side and a second side opposite to each other in a first direction, the number of the connecting protrusions (232) is two and they are respectively arranged on the first side and the second side, and the two connecting protrusions (232) have a spacing in a second direction perpendicular to the first direction.

4. The MCH heater according to claim 2, characterized in that: The flow channel unit (240) is provided with a first convex portion (242), the fixed end plate (230) is provided with a first concave portion (233) corresponding to the first convex portion (242), and the fixed end plate (230) forms a second convex portion (234) at the first concave portion (233) and protrudes in a direction away from the flow channel unit (240); a second concave portion (310) is provided on the inner wall surface of the controller housing (300), and the second convex portion (234) is embedded in the second concave portion (310).

5. The MCH heater according to claim 2, characterized in that: The connecting protrusion (232) is provided with a fixing hole (235), and a fastening bolt is inserted into the fixing hole (235); the inner wall surface of the controller housing (300) is provided with a threaded hole, and the fastening bolt is screwed into the threaded hole.

6. The MCH heater according to any one of claims 1 to 5, characterized in that: The fixed end plate (230) is provided with a weight-reducing hole (236).

7. The MCH heater according to claim 1, characterized in that: A sealing ring (400) is provided between the core housing (100) and the controller housing (300).

8. The MCH heater according to claim 7, characterized in that: The core shell (100) is provided with a matching annular surface, the controller housing (300) is provided with a matching surface, at least one of the matching annular surface and the matching surface is provided with an annular positioning groove (130), and the sealing ring (400) is embedded in the annular positioning groove (130).

9. The MCH heater according to claim 1, characterized in that: A buckle (140) having a buckle hole (141) is provided on one of the core shell (100) and the controller shell (300), and an undercut (320) is provided on the other of the core shell (100) and the controller shell (300), and the buckle hole (141) is snap-fitted with the undercut (320).

10. The MCH heater according to claim 1, characterized in that: The MCH heating core (200) comprises two stacked ceramic sheets and a metal wire sintered between the two ceramic sheets.

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