Electric heating plate and electric heating system

Abstract

The utility model relates to an electric heating plate and an electric heating system, the electric heating plate comprises a plate body, the plate body comprises a bottom layer, a heating body and a surface layer, and the surface layer is an A-level flame retardant material layer; the surface layer adopts a metal plate, a glass plate, a stone crystal plate, a calcium silicate plate, a rock wool plate or a ceramic plate; the plate body further comprises a conductive shielding layer which is selectively arranged between the surface layer and the heating body. The surface layer of the electric heating plate is made of a specific plate with A-level flame retardant property, so that the electric heating plate has excellent flame retardant effect, and the requirement of the market on the electric heating plate with high flame retardant property is met. The plate is high in strength, deformation such as hollowing is not prone to being formed after long-time use, the problem of leakage protection tripping caused by overlarge leakage current is fundamentally solved, the stability and reliability of the electric heating plate are improved, and the requirements of the market for efficient, safe and stable electric heating plates are met.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating, in particular to an electric heating plate and an electric heating system. Background Art

[0002] With the development of society, people have higher and higher requirements for the comfort of living environment, among which indoor temperature control is an important aspect. In order to meet this demand, various heating equipment have emerged. Among them, electric heating wall panels are a new heating method that has emerged in recent years. Compared with traditional air-conditioning heating, it has the advantages of fast heating, high heating comfort, and no blowing feeling in the room; compared with post-installed floor heating, it does not need to replace the floor, is more convenient to install, and heats faster, etc., and has good market development prospects.

[0003] The structure of traditional electric heating wall panels generally includes the panel body and the frame surrounding the panel body. The panel body includes the bottom layer, heating film and surface layer. The surface layer is usually made of wood, cotton cloth, plastic and other materials. The flame retardant performance of the product does not meet the standard. At the same time, it is also very easy to overheat the cover and cause major safety hazards. At the same time, the wall panels are prone to hollowing and deformation, insufficient insulation or even no insulation layer, no grounding electrode, and excessive leakage current causing leakage protection tripping.

[0004] In the prior art, some solutions have been proposed, such as using more fire-resistant materials (such as epoxy boards or B1 flame-retardant materials such as jute) to replace the wooden surface layer, or adding reinforcing ribs on the back of the bottom layer for support to prevent the wall panels from hollowing and deforming.

[0005] However, there are still many problems in practical applications:

[0006] 1) Although existing fireproof materials can improve the fireproof performance of wall heating systems to a certain extent, they still cannot meet the requirements of Class A flame retardancy;

[0007] 2) Although the existing anti-hollowing structure can reduce the occurrence of hollowing phenomenon, hollowing phenomenon may still occur after long-term use;

[0008] 3) Although adding an insulating layer can reduce leakage current to a certain extent, it still cannot fundamentally solve the problem of leakage current. There may still be leakage protection tripping problems, and it may also increase production costs;

[0009] 4) The existing structure has no reliable grounding and does not meet the requirements of 3C specifications;

[0010] 5) The existing structure uses a high-power heating system, which may cause local overheating and cause fire. Summary of the invention

[0011] The technical problem to be solved by the utility model is to provide an electric heating plate and a warm wall system which have good flame retardant effect, high strength and are not easily deformed after long-term use, in view of the deficiencies in the prior art.

[0012] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0013] An electric heating plate, comprising a plate body, wherein the plate body comprises a bottom layer, a heating element and a surface layer, wherein the surface layer is a Class A flame retardant material layer;

[0014] The surface layer is made of metal plate, glass plate, stone crystal plate, calcium silicate plate, rock wool plate or ceramic plate;

[0015] The board body further includes a conductive shielding layer selectively arranged between the surface layer and the heating element.

[0016] Furthermore, the metal plate is made of aluminum, iron, stainless steel, galvanized steel, copper, nickel, tin or an alloy.

[0017] According to some implementation aspects of the utility model, the surface layer is made of a honeycomb panel.

[0018] In some specific embodiments, the surface layer has a thickness of 0.5-30 mm.

[0019] In some specific embodiments, the honeycomb panel is a metal honeycomb panel, and the conductive shielding layer is provided between the surface layer and the heating element to reduce leakage current of the heating film;

[0020] The board body further includes an insulating layer disposed between the surface layer and the conductive shielding layer.

[0021] In some more specific embodiments, the insulating layer and the conductive shielding layer, the conductive shielding layer and the heating element, and the insulating layer and the surface layer are fixed by one or more of the following methods: uncured adhesive bonding, thermal conductive material bonding, fully cured resin bonding, and physical pressing. Furthermore, the uncured adhesive is an acrylic resin adhesive, a silicone adhesive, or a polyurethane adhesive; the fully cured resin is a conventional cross-linked resin such as an epoxy resin, an acrylic resin, a polyurethane resin, a polyurea resin, a fluorocarbon resin, a polyester resin, a vinyl ester resin, or an alkyd resin; and the thermal conductive material is thermal conductive silicone grease.

[0022] In some specific embodiments, the honeycomb panel is a honeycomb aluminum panel, a honeycomb iron panel, a honeycomb stainless steel panel or a honeycomb galvanized steel panel, and the thickness of the honeycomb panel is 2-30 mm.

[0023] In some specific embodiments, the conductive shielding layer includes a conductive shielding body layer and a resin layer selectively compounded with the conductive shielding body layer, the conductive shielding body layer is selected from one or more of aluminum, copper, iron, nickel, zinc, alloy or graphite, carbon nanotubes, graphene, carbon black, and the thickness of the conductive shielding layer is 0.1 to 100 μm.

[0024] In some specific embodiments, the conductive shielding layer includes a conductive shielding body layer and a resin layer compounded with the conductive shielding body layer, the resin layer is bonded to the heating element, and the resin layer is made of, for example, acrylic resin, polyurethane resin, etc.

[0025] Specifically, the conductive shielding layer may be made of aluminum foil tape.

[0026] In some specific embodiments, the insulating layer is independently selected from polyester film, polyimide film, silicone rubber or natural vulcanized / semi-vulcanized rubber film, epoxy board, mica board, tetrafluoro / vinylidene fluoride film, polyethylene film, polypropylene film or polyvinyl chloride film.

[0027] In some specific embodiments, the bottom layer is a Class A flame retardant material layer.

[0028] Preferably, the bottom layer is made of metal plate, glass plate, stone crystal plate, calcium silicate plate, rock wool plate or ceramic plate with a thickness of 0.1 to 10 mm, which not only provides excellent flame retardancy but also improves the strength of the electric heating plate.

[0029] In some specific embodiments, the power density of the heating element is 100 W / m 2 ~1000W / m 2 ; Voltage range 12~380V; The heating element is a constant power heating film or a self-limiting temperature heating film. Further, the power density is 200W / m 2 ~1000W / m 2 .

[0030] Furthermore, the heating element includes a first encapsulation insulating layer, a second encapsulation insulating layer, and a carbon film encapsulated between the first encapsulation insulating layer and the second encapsulation insulating layer, and a patterned metal electrode layer, wherein the metal electrode layer is a patterned aluminum foil, copper foil, nickel-chromium alloy sheet or stainless steel sheet, prepared by etching, die cutting and other processes, or a conductive silver or conductive copper electrode formed by silk screen printing; the carbon film is a mixture of one or more of carbon nanotubes, conductive carbon black, graphene, graphite or chopped carbon fiber powder, a conductive film formed by direct CVD deposition, or a conductive film formed by melt blending with polymers and other additives including phase change materials, or a conductive film formed by dispersed blending with polymer solutions, phase change materials, leveling agents, defoaming agents, etc. and coating or printing film formation and drying, or a conductive film prepared by breaking up with artificial synthetic fibers or natural fibers in a "papermaking" process. The slurry for making the carbon film can be commercially available.

[0031] The carbon film is preferably made of carbon nanotubes.

[0032] In some specific embodiments, the electric heating plate further comprises a frame surrounding the plate body and enclosing all structural layers, and the frame is a metal frame. The frame is made of a material such as aluminum alloy, stainless steel, galvanized steel, copper, iron, nickel, tin, etc. The plate body and the frame are fixed together using screws or buckles.

[0033] In some more specific embodiments, the metal frame has a thickness of 5 to 50 mm, a width of 5 to 25 mm, and a length of 0.5 to 3.2 m, and a horizontal metal bar is added every 100±10 cm in the length direction for support.

[0034] In some specific embodiments, the board body also includes an insulation layer arranged between the heating element and the bottom layer, and the thermal conductivity of the insulation layer is less than or equal to 0.1W / (m·K); further, the thermal conductivity is 0.01~0.1W / (m·K), which can effectively prevent heat loss.

[0035] The thermal insulation layer is a polyurethane thermal insulation board, an XPS thermal insulation board, a CR foam, an XPE thermal insulation cotton, a nano-microporous film, a vacuum insulation board or an aerogel.

[0036] In some embodiments, when a single or multiple electric heating panels are installed, the heating element of each electric heating panel is connected to a wire, and a plug is provided at the end of the wire, and the plug is used to connect to a socket on a connecting wire, and the connecting wire is used to connect to a controller. The number of wiring connections between the electric heating panel and the controller is greatly reduced, and the wiring between the controller and the electric heating panel is convenient.

[0037] In some specific embodiments, the electric heating plate further comprises a frame arranged around the outer periphery of the plate body and wrapping all structural layers, and at least one of the three components of the bottom layer, the surface layer and the frame is a metal component;

[0038] When a single electric heating panel is used for installation, a grounding post is provided on the metal component, the grounding post is connected to a grounding wire and fixes the grounding wire, and is reliably grounded;

[0039] When multiple electric heating panels are installed, if the frame is a metal component, the frames of the multiple electric heating panels are in contact with each other, or the frames of the multiple electric heating panels are connected by metal sheets, and a grounding column is provided on the frame of at least one of the electric heating panels, and the grounding column is connected to a grounding wire and fixes the grounding wire, so as to provide reliable grounding;

[0040] If the bottom layer or the surface layer is a metal component, grounding poles are respectively arranged on the inner surfaces of the bottom layers or the surface layers of the multiple electric heating panels, and the grounding poles on the multiple electric heating panels are connected to each other by metal sheets or wires. The grounding pole of at least one electric heating panel is connected to the grounding wire and the grounding wire is fixed, so that reliable grounding is arranged, so that the electric heating system can meet the requirements of the 3C specifications.

[0041] The frames of the multiple electric heating panels may be in direct contact with each other, or a protrusion may be provided on the frame of one of the two adjacent electric heating panels, and a groove or a recessed portion that can cooperate with the protrusion may be provided on the frame of the other electric heating panel. When the multiple electric heating panels are installed, the protrusion is inserted into the groove or the recessed portion to prevent the frames of the two adjacent electric heating panels from separating due to thermal expansion and contraction.

[0042] The grounding wire may be located on the base layer, surface layer or frame.

[0043] The second technical solution adopted by the utility model is: an electric heating system, including the electric heating panel described above, which can be applied to the wall heating renovation of existing houses and can also be used for ceiling heating renovation.

[0044] The electric heating system comprises a single electric heating panel or a plurality of electric heating panels, a controller and a conducting component for conducting electricity between the electric heating panel and the controller.

[0045] The conducting component includes a wire connected to the heating element of each electric heating plate, a plug and a connecting wire arranged on the wire, a socket that can be connected to the plug is arranged on the connecting wire, and the connecting wire is also used to connect to the controller. When in use, power is supplied to the heating element, and the heating temperature is controlled by the controller so that the surface temperature is maintained at 30-60°C to achieve heating.

[0046] When a plurality of electric heating panels are used for installation, a plurality of sockets are led out from the connecting line, so that each socket is correspondingly plugged with a plug.

[0047] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0048] The surface layer of the electric heating board of the utility model adopts a specific plate material with Class A flame retardant performance, so that the electric heating board has excellent flame retardant effect, meeting the market demand for electric heating boards with high flame retardant performance. In addition, the plate has high strength and is not easy to form hollowing and other deformations after long-term use, which improves the service life and user experience of the electric heating board, and fundamentally solves the problem of leakage current tripping due to leakage protection, improves the stability and reliability of the electric heating board, and meets the market demand for efficient, safe and stable electric heating boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a full cross-sectional view of the electric heating plate of Example 1;

[0050] Figure 2 It is a schematic structural diagram of the heating element of the electric heating plate of Example 1;

[0051] Figure 3 This is a schematic diagram of the structure of the electric heating plate of Example 1 installed on the wall;

[0052] Figure 4 This is a wiring diagram of the electric heating plate of Example 1;

[0053] Figure 5 for Figure 4 A schematic diagram of the structure of the connecting lines in FIG.

[0054] Figure 6 for Figure 4 A schematic diagram of the structure of the wires and plugs in FIG.

[0055] Figure 7 It is a rear view of the electric heating plate of Example 1;

[0056] Figure 8 This is a schematic diagram of the structure of the electric heating plate of Example 1 installed on the ceiling;

[0057] Fig. 9 is a full cross-sectional view of the electric heating plate of Example 2;

[0058] In the figure: 100, electric heating panel; 200, wall; 300, fixing frame; 400, ceiling;

[0059] 1. Bottom layer; 2. Insulation layer; 3. Heater; 31. First insulating packaging layer; 32. Second insulating packaging layer; 33. Carbon film; 34. Electrode; 4. Conductive shielding layer; 5. Frame; 6. Insulation layer; 7. Surface layer; 8. Wire; 9. Plug; 10. Connecting wire; 11. Socket; 12. Terminal. DETAILED DESCRIPTION

[0060] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0061] Example 1

[0062] See also Figures 1-2 The electric heating plate 100 provided in this embodiment includes a plate body and a frame 5 which is arranged around the periphery of the plate body and wraps all structural layers. The plate body includes a bottom layer 1, a thermal insulation layer 2, a heating element 3, a conductive shielding layer 4, an insulating layer 6 and a surface layer 7 which are arranged in sequence.

[0063] The surface layer 7 is made of honeycomb aluminum plate, which not only achieves Class A flame retardant performance, but also enhances the stability and sound insulation of the electric heating board, and solves the deformation problems such as hollowing of the electric heating board. It improves the service life and user experience of the electric heating board, and meets the market demand for high-quality, stable and reliable electric heating boards.

[0064] The honeycomb aluminum plate has a thickness of 10 mm and a pore size of 5 mm.

[0065] The bottom layer 1 is also made of Class A flame retardant material, such as aluminum plate, with a thickness of 1 mm; the frame 5 is made of aluminum frame, specifically, an aluminum frame with a thickness of 15 mm, a width of 10 cm, a length of 1 m, and a height of 2 m, and a transverse aluminum strip is added every 100 cm in the length direction for support. At the same time, the bottom layer 1 is made of aluminum plate.

[0066] The heating element 3 is placed between the honeycomb aluminum plate and the bottom aluminum plate 1, and is fixed with a metal aluminum frame on all sides, which effectively solves the problem that the existing electric heating panels cannot achieve Class A flame retardancy, greatly improves the safety of the electric heating panels, and meets the market demand for electric heating panels with high flame retardancy.

[0067] Providing a conductive shielding layer 4 and an insulating layer 6 between the honeycomb aluminum plate and the heating element 3 can effectively solve the leakage current problem caused by the metal surface layer and avoid the leakage current being too large and causing the leakage protection device to trip.

[0068] If the conductive shielding layer 4 is made of aluminum foil, the thickness is 0.05 mm; if the insulating layer 6 is made of PET film, adhesive is used to bond the surface layer 7 and the insulating layer 6, the conductive shielding layer 4 and the insulating layer 6, and the conductive shielding layer 4 and the heating element 3. The adhesive can be a non-curing adhesive, such as acrylic resin adhesive, silicone adhesive, and polyurethane adhesive.

[0069] The heating element 3 may be a commercially available planar heating film, such as a constant power heating film or a self-limiting temperature heating film. The self-limiting temperature heating film can avoid the problem of local overheating caused by overheating of the cover.

[0070] See also Figure 2 The heating element 3 includes a first insulating packaging layer 31, a second insulating packaging layer 32, a carbon film 33 encapsulated between the first insulating packaging layer 31 and the second insulating packaging layer 32, and a patterned metal electrode layer 34. The carbon film 33 and the electrode layer 34 are in contact with each other. The electrode layer 34 is formed by a metal sheet through etching, die cutting and other processes. For example, the electrode layer 34 uses a copper electrode layer. The carbon film 33 can be a carbon film formed by dispersing one or more of carbon nanotubes, carbon black, graphene, graphite or chopped carbon fiber powder, blending with a film-forming polymer, and then coating or printing. It is preferred to use carbon nanotubes to ensure the thermal efficiency of the heating element 3.

[0071] The heating power density of the heating element 3 is 200W / m 2 ~600W / m 2 , such as 450W / m 2 The working voltage is AC220V, the size of the heating element 3 is 1m×2m, and the thickness is 0.2mm.

[0072] The heat-insulating layer 2 may be made of a heat-insulating material with a thermal conductivity of 0.01 to 0.1 W / (m·K), such as a polyurethane heat-insulating board, which also has a B1-level flame-retardant effect.

[0073] See also Figure 3 The electric heating panel 100 is installed on the wall 200 through the fixing frame 300 and used as an electric heating wall panel to prepare an electric heating system to achieve room heating.

[0074] See also Figures 4 to 6 , multiple electric heating panels are installed, and the heating element of each electric heating panel 100 is connected to a wire 8, and a plug 9 is provided at the end of the wire 8, which can be called a female end; the plug 9 is used to connect to a socket 11 (called a male end) on a connecting wire 10, and the connecting wire 10 is used to connect to a controller. For the installation of multiple electric heating panels, multiple sockets 11 are led out from the connecting wire 10, so that each socket 11 is connected to a plug 9, reducing the number of connections between the controller and the electric heating panel.

[0075] In this example, if Figure 7As shown, terminal posts 12 are respectively arranged on the inner surfaces of the surface layers 7 of the plurality of electric heating panels. The terminal posts 12 are studs, which extend out of the bottom layer 1. The terminal posts 12 on the first electric heating panel are connected to the grounding wire and the grounding wire is fixed. Specifically, the grounding wire is fixed to the grounding post 12 with a nut. The terminal posts 12 of the plurality of electric heating panels are connected by metal sheets. The grounding post 12 is in contact with the wall and is reliably grounded to meet the requirements of the 3C specification.

[0076] By using the electric heating plate provided above, after the power is turned on, the controller is turned on to make the heating element 3 work, so that the surface temperature of the honeycomb aluminum plate can be maintained at 30-60° C., so as to realize the heating of the room.

[0077] like Figure 8 The electric heating plate 100 can also be installed on the ceiling 400 for top heating. The electric heating plate 100 can be installed on the ceiling 400 through the fixing frame 300. If it is applied to a room with a suspended ceiling, it can be spliced ​​with the original suspended ceiling to form a whole, which does not occupy the indoor space and improves the utilization rate of the indoor space. It is easy to install and can reduce the installation cost.

[0078] Regardless of whether the electric heating panel is installed on the wall or on the ceiling, during actual use, a convection module can be installed on one or more edges of the electric heating panel. The convection module can be a cross-flow fan, which can be arranged in one piece or in multiple pieces. It can make the hot air convect indoors and improve the heating effect. At the same time, it also increases the function of the heating equipment to meet people's growing needs.

[0079] Example 2

[0080] See also Fig. 9 The electric heating plate 100 provided in this embodiment is different from that in Embodiment 1 in that the surface layer 7 is made of a calcium silicate board, and the conductive shielding layer 4 and the insulating layer 6 are omitted, and the calcium silicate board is bonded to the heating element 3 instead.

[0081] The electric heating panel can be widely used in application fields such as building heating, building materials and electromagnetic shielding.

[0082] In summary, the above-described embodiments have the following advantages:

[0083] 1) The heating element is placed between the honeycomb aluminum plate and the bottom aluminum plate, and is fixed with a metal aluminum frame around it, which effectively solves the problem that the existing electric heating panels cannot achieve Class A flame retardancy, improves the safety performance of the electric heating panels, and meets the market demand for electric heating panels with high flame retardancy;

[0084] 2) The surface layer is made of honeycomb aluminum plate, which effectively avoids hollowing, improves the service life of the product and user experience, and meets the market demand for high-quality, stable and reliable electric heating panels;

[0085] 3) Adding a conductive shielding layer between the honeycomb aluminum plate and the heating element effectively solves the problem of leakage current tripping due to excessive leakage protection, improves the stability and reliability of the electric heating plate, and meets the market demand for efficient, safe and stable electric heating plates;

[0086] 4) The electric heating panel can be installed flexibly without being restricted by location. It can be installed on the wall or on the ceiling.

[0087] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An electric heating plate, comprising a plate body, wherein the plate body comprises a bottom layer, a heating element and a surface layer, Features: The surface layer is a Class A flame retardant material layer; The surface layer is made of metal plate, glass plate, stone crystal plate, calcium silicate plate, rock wool plate or ceramic plate; The board body further includes a conductive shielding layer selectively arranged between the surface layer and the heating element.

2. The electric heating plate according to claim 1, Features: The surface layer is made of honeycomb panel; and / or, The thickness of the surface layer is 0.5 to 30 mm.

3. The electric heating plate according to claim 2, Features: The honeycomb panel is a metal honeycomb panel, and the conductive shielding layer is arranged between the surface layer and the heating element; The board body further includes an insulating layer disposed between the surface layer and the conductive shielding layer.

4. The electric heating plate according to claim 3, Features: The honeycomb panel is a honeycomb aluminum panel, a honeycomb iron panel, a honeycomb stainless steel panel or a honeycomb galvanized steel panel; and / or, The thickness of the honeycomb panel is 2 to 30 mm; and / or, The conductive shielding layer comprises a conductive shielding body layer and a resin layer selectively compounded with the conductive shielding body layer, the conductive shielding body layer is selected from one of aluminum, copper, iron, nickel, zinc, alloy or graphite, carbon nanotubes, graphene, and carbon black, and the thickness of the conductive shielding layer is 0.1 to 100 um; and / or, The insulating layer is independently selected from polyester film, polyimide film, silicone rubber or natural vulcanized / semi-vulcanized rubber film, epoxy board, mica board, tetrafluoroethylene / vinylidene fluoride film, polyethylene film, polypropylene film or polyvinyl chloride film; and / or, The insulating layer and the conductive shielding layer, the conductive shielding layer and the heating element, and the insulating layer and the surface layer are fixed by one or more of the following methods: uncured adhesive bonding, thermal conductive material bonding, fully cured resin bonding, and physical pressing.

5. The electric heating plate according to claim 1, Features: The bottom layer is a Class A flame retardant material layer, and the bottom layer is made of a metal plate, a glass plate, a stone crystal plate, a calcium silicate plate, a rock wool plate or a ceramic plate, and has a thickness of 0.1 to 10 mm.

6. The electric heating plate according to claim 1, Features: The power density of the heating element is 100W / m 2 ~1000W / m 2 ; Voltage range 12~380V; and / or, The heating element is a constant power heating film or a self-limiting temperature heating film; and / or, The electric heating plate also includes a frame which is arranged around the outer periphery of the plate body and wraps all structural layers, and the frame is a metal frame.

7. The electric heating plate according to any one of claims 1 to 6, Features: The board body also includes an insulation layer arranged between the heating element and the bottom layer, and the thermal conductivity of the insulation layer is less than or equal to 0.1W / (m·K); the insulation layer is a polyurethane insulation board, XPS insulation board, CR foam, XPE insulation cotton, nano-microporous membrane, vacuum insulation board or aerogel.

8. The electric heating plate according to claim 1, Features: When a single or multiple electric heating panels are installed, the heating element of each electric heating panel is connected to a wire, and a plug is provided at the end of the wire. The plug is used to connect to the socket on the connecting line, and the connecting line is used to connect to the controller.

9. The electric heating plate according to claim 8, Features: The electric heating plate also includes a frame arranged around the outer periphery of the plate body and wrapping all structural layers, and at least one of the three components of the bottom layer, the surface layer and the frame is a metal component. When a single electric heating panel is used for installation, a grounding post is provided on the metal component, the grounding post is connected to a grounding wire and fixes the grounding wire, and is reliably grounded; When multiple electric heating panels are installed, if the frame is a metal component, the frames of the multiple electric heating panels are in contact with each other, or the frames of the multiple electric heating panels are connected by metal sheets, and a grounding column is provided on the frame of at least one of the electric heating panels, and the grounding column is connected to a grounding wire and fixes the grounding wire, so as to provide reliable grounding; If the bottom layer or the surface layer is a metal component, grounding posts are respectively arranged on the inner surfaces of the bottom layers or the surface layers of the plurality of electric heating panels, and the grounding posts on the plurality of electric heating panels are connected by metal sheets or wires, and the grounding post of at least one electric heating panel is connected to a grounding wire and the grounding wire is fixed, so as to be reliably grounded; The metal parts are connected by metal sheets, wherein at least one metal part of the electric heating plate is connected to a grounding wire and the grounding wire is fixed, so that the grounding is reliably arranged.

10. An electric heating system, Features: The electric heating panel according to any one of claims 1 to 9 can be used for wall heating renovation of existing houses, and can also be used for ceiling heating renovation.

Images