An electric heater

Abstract

The present invention discloses an electric heater, comprising: a base plate, on which a first heating element is bonded; an upper cover, which is adjustably connected to the base plate, on which a second heating element is bonded; side enclosures, with two side enclosures disposed between the base plate and the upper cover; the base plate, the upper cover, and the two side enclosures constituting an adjustable heat-collecting space. The present invention increases the heating effect by bonding the first heating element to the upper cover and the second heating element to the base plate, thereby avoiding a significant temperature difference between the upper and lower surfaces of the user's feet and improving user comfort. The upper cover, the base plate, and the two side enclosures together constitute an adjustable heat-collecting space, which can effectively prevent heat from escaping and improve the thermal insulation performance of the product, thereby achieving the purpose of energy saving and cost reduction. The product has a simple structure, is easy to use, and is suitable for industrial application and promotion.

Description

Technical Field

[0001] The present invention relates to the field of household appliances, and in particular to an electric heater. Background Art

[0002] In cold northern areas where there is a lack of indoor central heating equipment or in cold southern areas, people often use electric heaters to keep warm in winter.

[0003] There are different electric heaters for different parts of the body. Taking the foot heater as an example, the existing foot heater has a heat-gathering space, and the heat-gathering space has a built-in heating element. The heat generated by the heating element is gathered in the heat-gathering space to heat the user's feet, meeting the user's feet warming needs. The heating element of a conventional foot heater is often set in the direction of the user's sole, which makes it easy for the upper and lower sides of the user's feet in the heat-gathering space to have a temperature difference, resulting in low comfort. At the same time, the existing heating element is usually installed on the electric heater by screws, clips, rivets, etc., and its installation process is complicated, the cost is high, and it is not conducive to production. Summary of the Invention

[0004] In order to overcome at least one of the defects described in the above-mentioned prior art, the present invention provides an electric heater, comprising: a base plate, on which a first heating element is bonded; an upper cover, which is adjustably connected to the base plate, and on which a second heating element is bonded; side panels, wherein two side panels are arranged between the base plate and the upper cover; the base plate, the upper cover and the two side panels are limited to form an adjustable heat collection space.

[0005] The present invention increases the heating effect by gluing a first heating element to the upper cover and a second heating element to the bottom plate, thereby avoiding a significant temperature difference between the upper and lower surfaces of the user's feet, thereby improving user comfort. The upper cover, the bottom plate and the two side enclosures together form an adjustable heat-gathering space, which can effectively prevent heat from escaping and improve the thermal insulation performance of the product, thereby achieving the purpose of energy saving and cost reduction. The product has a simple structure and is easy to use, making it suitable for industrial application and promotion.

[0006] During use, the first heating element installed on the upper cover and the second heating element installed on the bottom plate generate heat respectively, and the heat is gathered between the upper cover, the bottom plate and the two side enclosures, that is, the heat is gathered in the heat gathering space, thereby providing the user with a good heating effect, and there is no obvious temperature difference between the soles and insteps of the user's feet, which effectively improves the user's comfort.

[0007] At the same time, because the upper cover is adjustably connected to the base plate, the volume of the heat collection space is adjustable, allowing the volume of the heat collection space to be adjusted according to actual needs during use to adjust the heat within the heat collection space. Specifically, when the heating capacity of the first and second heating elements remains unchanged, adjusting the distance between the upper cover and the base plate to compress the heat collection space can increase the amount of heat accumulated per unit volume within the heat collection space, thereby increasing the temperature within the heat collection space. Adjusting the distance between the upper cover and the base plate to expand the heat collection space can reduce the amount of heat accumulated per unit volume within the heat collection space, thereby lowering the temperature within the heat collection space.

[0008] In addition, during use, users can move the upper cover position directly by their feet according to their own needs based on the perceived temperature of their feet, thereby quickly adjusting the relative position between the upper cover and the bottom plate to adjust the temperature in the heat collection space. It is easy to use and highly practical.

[0009] In some embodiments, it further includes: an adhesive layer, which is provided on a side of the first heating element facing the bottom plate and a side of the second heating element facing the upper cover.

[0010] The heating elements of existing electric heaters on the market are usually installed on the base plate by screws, clips, rivets, etc., which has a complicated installation process, high cost, and is not conducive to production.

[0011] In comparison, in addition to providing a positioning structure, the present invention also provides an adhesive layer on the first heating element and the second heating element respectively. This not only facilitates assembly, but also effectively improves the connection strength between the first heating element and the base plate, and the second heating element and the upper cover, thereby improving product safety and stability, as well as improving product quality and competitiveness.

[0012] In some embodiments, a positioning structure is further included; the bottom plate and the first heating element are connected via the positioning structure; the upper cover and the second heating element are connected via the positioning structure.

[0013] The present invention is also provided with a positioning structure to increase the connection strength between the base plate and the first heating element, the upper cover and the second heating element, to avoid the first heating element and the second heating element from melting and loosening during the use of the product, thereby effectively improving the stability and safety of the product and improving the product quality.

[0014] In some embodiments, the positioning structure includes positioning ridges and positioning holes that are snap-fitted, and / or snap-fitted slots and snap-fitted parts, and / or magnetic parts that are magnetically connected.

[0015] It should be noted that the positioning structure can be positioning ridges and positioning holes that cooperate with each other, the positioning structure can also be a card slot and a card connector that are snap-connected, or it can be a detachable connection structure, such as a magnetic connection or a fixed structure. The specific setting of the positioning structure has different settings due to different actual needs, and will not be repeated here.

[0016] In some embodiments, the positioning structure includes a positioning rib and a positioning hole that are snap-fitted together, and the positioning rib is a polygonal rib.

[0017] When the positioning structure includes a positioning ridge set on the bottom plate and a positioning ridge set on the upper cover, at this time, in order to achieve the positioning effect and prevent the first heating element from moving relative to the bottom plate, and prevent the second heating element from moving relative to the upper cover, it is necessary to set the positioning ridge to a polygon, and the positioning hole is set to correspond to the shape of the positioning ridge.

[0018] In addition, the positioning rib can also be other shapes or structures with positioning effects, such as setting the positioning rib as an elliptical body, or setting a snap-fit ​​protrusion on the positioning rib, and setting a corresponding snap-fit ​​groove on the positioning hole and / or the positioning hole.

[0019] In some embodiments, the upper cover is rotatably arranged relative to the bottom plate.

[0020] In some embodiments, a hinge is further included, wherein the hinge includes a first connecting member connected to the bottom plate and a second connecting member connected to the upper cover.

[0021] In this embodiment, a hinge is provided between the upper cover and the base plate. The hinge comprises a second connector connected to the upper cover and a first connector connected to the base plate. A toothed engaging portion is provided between the first and second connectors to provide a snap-fitting effect within a certain angular range, thereby improving the stability of the upper cover and base plate after angle adjustment and achieving a multi-level adjustment effect. This arrangement provides a locking effect when the upper cover and base plate are hinged, improving angular stability during angle adjustment. In other embodiments, the rotational connection method between the upper cover and base plate may vary depending on actual needs and will not be further described here.

[0022] In some embodiments, the side surrounding members are detachably connected to the upper cover and / or the bottom plate.

[0023] The side edges are detachably connected to the upper cover and / or bottom plate, and the product can be disassembled for easy carrying in specific environments where storage is required, such as traveling or moving.

[0024] In some embodiments, the side wrapping elements include a folding region between the bottom panel and the top cover, and a supporting edge disposed at the folding region adjacent to the bottom panel and / or the top cover.

[0025] It should be noted that the upper cover is rotatably connected relative to the bottom plate. In this embodiment, the upper cover is hinged to the bottom plate, and the side parts include flexible folding areas, so that the size of the heat collection space can be adjusted by adjusting the position of the upper cover.

[0026] The folding area's function is to adapt to changes in the opening and closing angle of the upper cover and base plate, ensuring that a heat-collecting space is formed between it, the base plate, and the upper cover. Preferably, the folding area of ​​the side wrapping members in this embodiment is made of a flexible material. In other embodiments, the folding area can be made of an elastic material, such as rubber. It will be readily understood that the folding area can also be formed by a telescopic structure, such as a telescopic rod or telescopic wall connecting the upper cover and base plate at either end.

[0027] Compared to integrated electric heaters, this invention pivots the top cover onto the bottom plate and provides flexible folding areas on the side panels, allowing users to adjust the heat-collecting space according to their needs, improving user comfort. In certain situations, such as travel or moving, where storage is required, this invention can be folded to reduce space usage, making it easier to transport or carry, thereby increasing product competitiveness.

[0028] In some embodiments, the side surrounding members further include a fastening groove and a fastening member that are fastened to each other; one of the fastening groove and the fastening member is arranged on the upper cover and / or the bottom plate, and the other is arranged on the supporting edge.

[0029] It should be noted that in this embodiment, the upper cover and the bottom plate are each provided with a snap-fitting groove, and the supporting edge is provided with a snap-fitting member protruding toward the snap-fitting groove. In other embodiments, the bottom plate and / or the upper cover can be provided with different structures for detachable connection to the supporting edge according to actual needs, such as a snap-fitting structure, a riveted structure, a screw-fitting structure, etc., which will not be described in detail here.

[0030] In summary, the electric heater provided by the present invention has the following technical effects:

[0031] (1) The present invention increases the heating effect by bonding a first heating element to the upper cover and a second heating element to the bottom plate, thereby avoiding a significant temperature difference between the upper and lower surfaces of the user's feet, thereby improving the user's comfort. The upper cover, the bottom plate and the two side enclosures together form an adjustable heat-collecting space, which can effectively prevent heat from escaping and improve the thermal insulation performance of the product, thereby achieving the purpose of energy saving and cost reduction. In addition, the product has a simple structure, is easy to use, and is suitable for industrial application and promotion.

[0032] (2) The present invention adjustably connects the upper cover to the bottom plate, and can compress the heat-collecting space by adjusting the distance between the upper cover and the bottom plate, thereby increasing the heat accumulation per unit volume in the heat-collecting space, thereby achieving the effect of increasing the temperature in the heat-collecting space; and when the distance between the upper cover and the bottom plate is adjusted to increase the heat-collecting space, the heat accumulation per unit volume in the heat-collecting space can be reduced, thereby achieving the effect of lowering the temperature in the heat-collecting space.

[0033] (3) The present invention is also provided with a positioning structure to increase the connection strength between the base plate and the first heating element, and between the upper cover and the second heating element, to avoid the first heating element and the second heating element from melting and loosening during the use of the product, thereby preventing safety hazards from occurring. This effectively improves the stability and safety of the product and improves the product quality.

[0034] (4) In addition to providing a positioning structure, the present invention also provides an adhesive layer on the first heating element and the second heating element, respectively. This not only facilitates assembly, but also effectively improves the connection strength between the first heating element and the base plate, and between the second heating element and the upper cover, thereby improving product safety and stability, as well as improving product quality and competitiveness.

[0035] (5) By pivoting the top cover onto the bottom plate and providing folding areas on the side panels, the present invention allows users to adjust the size of the heat-collecting space according to their actual needs, thereby improving user comfort. In certain situations where storage is required, such as travel or moving, the present invention can be folded to reduce space usage, making it easier to transport or carry, thereby increasing product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0037] Figure 2 Schematic diagram of the assembly of the side panel;

[0038] Figure 3 Schematic diagram of the cross section of the fastening member and the fastening groove when they are engaged;

[0039] Figure 4 is a schematic structural diagram of the second heating element;

[0040] Figure 5 This is a schematic diagram of the assembly of the upper cover and the second heating element;

[0041] Figure 6 for Figure 1 Exploded diagram.

[0042] The meanings of the reference numerals are as follows:

[0043] 1. Electric heater; 2. Bottom plate; 3. Upper cover; 31. Second heating element; 4. Side surround; 41. Folding area; 42. Support edge; 421. Fastening member; 5. Positioning structure; 51. Positioning ridge; 52. Positioning hole; 6. Fastening groove; 7. Massage structure; 8. Aromatherapy box; 9. Hinge; 91. Snap-fit ​​portion. DETAILED DESCRIPTION

[0044] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. 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. Therefore, they cannot be understood as limiting the present invention.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0047] See Figure 1 、 Figure 2 、 Figure 5 and Figure 6 An electric heater 1 includes: a base plate 2, on which a first heating element is bonded; an upper cover 3, which is adjustably connected to the base plate 2, and on which a second heating element 31 is bonded; side panels 4, wherein two side panels 4 are arranged between the base plate 2 and the upper cover 3; the base plate 2, the upper cover 3 and the two side panels 4 are limited to form an adjustable heat-gathering space.

[0048] During use, the first heating element installed on the upper cover 3 and the second heating element 31 installed on the bottom plate 2 generate heat respectively, and the heat is gathered between the upper cover 3, the bottom plate 2 and the two side enclosures 4, that is, the heat is gathered in the heat gathering space, thereby providing the user with a good heating effect, and there is no obvious temperature difference between the upper and lower surfaces of the user's feet, which effectively improves the user's comfort.

[0049] The present invention increases the heating effect by bonding a first heating element to the upper cover 3 and bonding a second heating element 31 to the bottom plate 2, thereby avoiding obvious temperature differences between the soles and insteps of the user, thereby improving user comfort. The upper cover 3, the bottom plate 2 and the two side enclosures 4 together constitute an adjustable heat-gathering space, which can effectively prevent heat from escaping and improve the thermal insulation performance of the product, thereby achieving the purpose of energy saving and cost reduction. The product has a simple structure and is easy to use, making it suitable for industrial application and promotion.

[0050] At the same time, because the upper cover 3 is adjustable and connected to the bottom plate 2, the volume of the heat-collecting space is adjustable. This allows the volume of the heat-collecting space to be adjusted according to actual needs during use to regulate the amount of heat within the heat-collecting space. Specifically, when the heating capacity of the first and second heating elements 31 remains unchanged, adjusting the distance between the upper cover 3 and the bottom plate 2 to compress the heat-collecting space can increase the amount of heat accumulated per unit volume within the heat-collecting space, thereby increasing the temperature within the heat-collecting space. Adjusting the distance between the upper cover 3 and the bottom plate 2 to increase the heat-collecting space can reduce the amount of heat accumulated per unit volume within the heat-collecting space, thereby lowering the temperature within the heat-collecting space.

[0051] In addition, during use, the user can move the position of the upper cover 3 directly by the foot according to the perceived temperature of the foot and according to his own needs, thereby quickly adjusting the relative position between the upper cover 3 and the bottom plate 2 to adjust the temperature in the heat collection space. It is easy to use and practical.

[0052] It should also be noted that the base plate 2 is provided with a raised massage structure 7, with an aromatherapy box 8 positioned in the center of the massage structure 7. The upper cover 3 is internally provided with therapeutic equipment, including but not limited to an infrared germicidal lamp and a long-range therapy lamp. The raised massage structure 7 is shaped like a sole of a foot, serving as a reminder. This product is versatile and can provide massage and therapy functions to meet people's daily needs.

[0053] It also includes: an adhesive layer (not shown in the figure), which is arranged on the side of the first heating element facing the bottom plate 2 and the side of the second heating element 31 facing the upper cover 3.

[0054] The heating elements of existing electric heaters on the market are usually installed on the base plate by screws, clips, rivets, etc., which has a complicated installation process, high cost, and is not conducive to production.

[0055] In comparison, in addition to providing the positioning structure 5, the present invention also provides an adhesive layer on the first heating element and the second heating element 31, respectively. This not only facilitates assembly, but also effectively improves the connection strength between the first heating element and the base plate 2, and the second heating element 31 and the upper cover 3, thereby improving product safety and stability, as well as improving product quality and competitiveness.

[0056] Optionally, the adhesive layer may be glue or Velcro.

[0057] See Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , further comprising a positioning structure 5; the bottom plate 2 and the first heating element are connected via the positioning structure 5; the upper cover 3 and the second heating element 31 are connected via the positioning structure 5. The present invention is further provided with a positioning structure 5 to increase the connection strength between the bottom plate 2 and the first heating element, and between the upper cover 3 and the second heating element 31, thereby preventing the first and second heating elements 31 from melting and loosening during use, thereby effectively improving the stability and safety of the product and enhancing product quality.

[0058] See Figure 1 and Figure 5 The positioning structure 5 includes a positioning ridge 51 and a positioning hole 52 that are snap-fitted, and / or a card slot and a card connector that are snap-fitted, and / or a magnetic member that is magnetically connected.

[0059] In this embodiment, the positioning structure 5 includes a positioning ridge 51, which is arranged on the side of the base plate 2 facing the first heating element and the side of the upper cover 3 facing the second heating element 31; positioning holes 52, which are respectively arranged on the first heating element and the second heating element 31, and the positioning ridge 51 is embedded in the positioning hole 52.

[0060] Specifically, a plurality of positioning holes 52 are provided on the first heating element, a plurality of positioning ribs 51 are provided on the bottom plate 2, and the positioning holes 52 and the positioning ribs 51 are connected one-to-one, and the positioning ribs 51 are embedded in the positioning holes 52; and a plurality of positioning holes 52 are provided on the second heating element 31, a plurality of positioning ribs 51 are provided on the upper cover 3, and the positioning holes 52 and the positioning ribs 51 are connected one-to-one, and the positioning ribs 51 are embedded in the positioning holes 52.

[0061] It should be noted that, in this embodiment, the positioning structure 5 is a positioning ridge 51 and a positioning hole 52 that cooperate with each other. In other embodiments, the positioning structure 5 can be a card slot and a card connector that are snap-connected. The positioning structure 5 can also be a detachable connection structure, such as a magnetic connection or a fixed structure. The specific setting of the positioning structure 5 has different settings due to different actual needs, which will not be repeated here.

[0062] The positioning ridge 51 is a polygonal ridge.

[0063] In some embodiments, the positioning structure 5 includes a positioning ridge 51 set on the base plate 2 and a positioning ridge 51 set on the upper cover 3. At this time, in order to achieve the positioning effect and prevent the first heating element from moving relative to the base plate 2, and prevent the second heating element 31 from moving relative to the upper cover 3, it is necessary to set the positioning ridge 51 to a polygon, and the positioning hole 52 is set to correspond to the shape of the positioning ridge 51.

[0064] In addition, the positioning rib 51 can also be other shapes or structures with positioning effects, such as setting the positioning rib 51 as an elliptical body, or setting a snap-fit ​​protrusion on the positioning rib 51, and setting a corresponding snap-fit ​​groove on the positioning hole 52 and / or the positioning hole 52.

[0065] See Figure 1 and Figure 2 and Figure 6 The upper cover 3 is rotatably arranged relative to the bottom plate 2.

[0066] In this embodiment, the upper cover 3 and the bottom plate 2 are hinged. Specifically, a hinge 9 is provided between the upper cover 3 and the bottom plate 2. The hinge 9 includes a second connector connected to the upper cover 3 and a first connector connected to the bottom plate 2. A toothed engaging portion 91 is provided between the first connector and the second connector, which can provide a clamping and fixing effect within a certain angle range, improve the stability of the upper cover 3 and the bottom plate 2 after the angle is adjusted, and form a multi-level adjustment effect. This arrangement enables the upper cover 3 to have a locking effect when hinged to the bottom plate 2, and can improve the angular stability when the angle is adjusted. In other embodiments, the rotational connection method between the upper cover 3 and the bottom plate 2 varies according to actual needs and will not be described in detail here.

[0067] See Figure 1 and Figure 2 The side parts 4 are detachably connected to the upper cover 3 and / or the bottom plate 2.

[0068] In some embodiments, the side edges are detachably connected to the upper cover 3 and / or the bottom plate 2, so that the product can be disassembled for portability in specific environments, such as when traveling or moving and other scenarios where storage is required.

[0069] See Figure 2 and Figure 3 The side frame member 4 includes a folding area 41 between the bottom plate 2 and the upper cover 3, and a supporting edge 42 arranged at the folding area 41 close to the bottom plate 2 and / or the upper cover 3; the folding area 41 is made of flexible material.

[0070] It should be noted that the function of the folding area 41 is to adapt to the change of the opening and closing angle of the upper cover 3 and the bottom plate 2 to ensure that a heat collection space is still formed between it, the bottom plate 2 and the upper cover 3.

[0071] Preferably, the folding region 41 of the side wrapping member 4 in this embodiment is made of a flexible material. In other embodiments, the folding region 41 can be made of an elastic material, such as rubber. It will be appreciated that the folding region 41 can also be formed of a structure having a telescopic function, such as a telescopic rod or telescopic wall with its ends connecting the upper cover 3 and the bottom plate 2, respectively.

[0072] Compared to integrated electric heaters, the present invention pivots the upper cover 3 onto the base plate 2 and provides folding areas 41 on the side panels 4, allowing users to adjust the heat-collecting space to suit their needs, improving user comfort. In certain situations, such as travel or moving, the present invention can be folded to reduce space usage, making it easier to transport or carry, thereby increasing product competitiveness.

[0073] See Figure 2 、 Figure 3 and Figure 4 The side frame member 4 further includes a fastening groove 6 and a fastening member 421 that are fastened to each other; one of the fastening groove 6 and the fastening member 421 is set on the upper cover 3 and / or the bottom plate 2, and the other is set on the supporting edge 42.

[0074] It should be noted that in this embodiment, the upper cover 3 and the bottom plate 2 are respectively provided with a snap-fitting groove 6, and the supporting edge 42 is provided with a snap-fitting member 421 protruding toward the snap-fitting groove 6. In other embodiments, the bottom plate 2 and / or the upper cover 3 can be provided with different structures for detachable connection to the supporting edge 42 according to different actual needs, such as a snap-fitting structure, a riveted structure, a screw-fitting structure, etc., which will not be repeated here.

[0075] The present invention increases the heating effect by bonding a first heating element to the upper cover 3 and bonding a second heating element 31 to the bottom plate 2, thereby avoiding obvious temperature differences between the soles and insteps of the user, thereby improving user comfort. The upper cover 3, the bottom plate 2 and the two side enclosures 4 together constitute an adjustable heat-gathering space, which can effectively prevent heat from escaping and improve the thermal insulation performance of the product, thereby achieving the purpose of energy saving and cost reduction. The product has a simple structure and is easy to use, making it suitable for industrial application and promotion.

[0076] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An electric heater, characterized in that: include: A bottom plate (2) is bonded with a first heating element; An upper cover (3) is adjustably connected to the bottom plate (2), and a second heating element (31) is bonded to the upper cover (3); Side enclosure members (4), wherein the two side enclosure members (4) are arranged between the bottom plate (2) and the upper cover (3); The bottom plate (2), the upper cover (3) and the two side surrounding parts (4) are limited to form an adjustable heat-collecting space; The upper cover (3) is rotatably arranged relative to the bottom plate (2); The side frame member (4) comprises a folding area (41) between the base plate (2) and the upper cover (3), and a supporting edge (42) arranged at a position of the folding area (41) close to the base plate (2) and / or the upper cover (3).

2. An electric heater according to claim 1, characterized in that: Also includes: An adhesive layer is provided on a side of the first heating element facing the bottom plate (2) and a side of the second heating element (31) facing the upper cover (3).

3. An electric heater according to claim 1 or 2, characterized in that: Also includes a positioning structure (5); The bottom plate (2) and the first heating element are connected via the positioning structure (5); The upper cover (3) and the second heating element (31) are connected via the positioning structure (5).

4. An electric heater according to claim 3, characterized in that: The positioning structure (5) comprises a positioning ridge (51) and a positioning hole (52) that are snap-fitted, and / or a card slot and a card connector that are snap-fitted, and / or a magnetic member that is magnetically connected.

5. The electric heater according to claim 4, characterized in that: The positioning structure (5) comprises a positioning rib (51) and a positioning hole (52) that are snap-fitted together, and the positioning rib (51) is a polygonal rib.

6. The electric heater according to claim 1, characterized in that: The electric heater (1) further comprises a hinge (9), wherein the hinge (9) comprises a first connecting member connected to the base plate (2) and a second connecting member connected to the upper cover (3).

7. The electric heater according to claim 6, characterized in that: The side enclosure members (4) are detachably connected to the upper cover (3) and / or the bottom plate (2).

8. The electric heater according to claim 7, characterized in that: The side surrounding member (4) further comprises a fastening groove (6) and a fastening member (421) that are fastened to each other; One of the fastening groove (6) and the fastening member (421) is arranged on the upper cover (3) and / or the bottom plate (2), and the other is arranged on the supporting edge (42).

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