Spraying insulation heating disc and electric heating device

Abstract

A spraying insulation heating disc comprises an upper cover, a heating assembly and a sealing cover, the heating assembly comprises a heating core plate, the heating core plate is located between the upper cover and the sealing cover, the upper surface of the heating core plate is in contact connection with the upper cover, a mica insulation sheet is arranged below the heating core plate, the mica insulation sheet is in contact connection with the sealing cover, and the mica insulation sheet is in contact connection with the sealing cover. A clamping groove is formed in the periphery of the heating core plate, the heating wire is evenly wound in the clamping groove, an insulating layer is sprayed on the inner surface of the upper cover, and the edge of the upper cover is fixedly connected with the sealing cover. The design of the upper cover sprayed with the insulating layer plays a good insulating effect, an insulating mica sheet does not need to be arranged between the upper cover and the heating core plate, the heat efficiency can be greatly improved, and the heat energy conversion rate is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric heating equipment, and specifically relates to a spraying insulation heating disc and electric heating device. BACKGROUND

[0002] Electric heating wire heating is a principle of utilizing the resistance heating in the conductive material, and heat is generated by the current passing through the electric heating wire. The electric heating wire heating equipment has simple structure, low manufacturing cost and convenient use. It is widely used in the fields of cooking devices, industrial equipment and medical instruments. It has the characteristics of fast heating speed, uniform heating and high reliability. In addition, the temperature of the electric heating wire heating equipment can be accurately controlled, and it is suitable for some occasions requiring accurate temperature control.

[0003] Because the heat generated by the electric heating wire heating is mainly concentrated around the electric heating wire, it may not meet the requirements in some occasions requiring uniform heating.

[0004] The existing electric heating wire heating device needs to electrify the heating wire, and the upper cover and the sealing cover firmly clamp and fix the heating core plate. Mica insulating sheets are arranged between the heating core plate and the upper cover and between the heating core plate and the sealing cover, so as to solve the insulation problem of the heating core plate. Although the mica insulating sheet plays an insulating role, it also insulates, so that the heat efficiency of the heating disc is low.

[0005] The technology on the market at present is to make the mica insulating sheet thinner, which reduces the influence on the heat efficiency under the premise of insulating safety, but the design effect is not good.

[0006] Therefore, there is an urgent need in the market for an electric heating wire heating disc with higher heat efficiency. SUMMARY

[0007] The utility model discloses a kind of spraying insulation heating discs with high heat efficiency, good heat conduction effect and insulation safety, to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0009] A spraying insulation heating disc includes an upper cover, a heating assembly and a sealing cover. The heating assembly includes a heating core plate. The heating core plate is located between the upper cover and the sealing cover. The upper surface of the heating core plate is in contact with the upper cover. A mica insulating sheet is arranged below the heating core plate. The mica insulating sheet is in contact with the sealing cover.

[0010] A clamping groove is provided around the heating core plate. The electric heating wire is uniformly wound in the clamping groove.

[0011] The inner surface of the upper cover is sprayed with an insulating layer. The edge of the upper cover is fixedly connected with the sealing cover.

[0012] The upper cover comprises a circular ring body, an outer reinforcing edge and an inner reinforcing edge, the inner surfaces of the circular ring body, the outer reinforcing edge and the inner reinforcing edge are provided with insulation layers, the inner reinforcing edge is formed by extending downward from a through hole in the middle of the circular ring body, the outer reinforcing edge is formed by extending downward from the circumference of the circular ring body, the cover is provided with a circular hole corresponding to the through hole, and the heating core plate is provided with a notch corresponding to the inner reinforcing edge,

[0013] The outer reinforcing edge is connected to the edge of the cover by flanging from the outside to the inside,

[0014] The inner reinforcing edge is connected to the edge of the cover by flanging from the inside to the outside.

[0015] The heating core plate comprises a first mica fixing piece and a second mica fixing piece, and the first mica fixing piece and the second mica fixing piece are both semicircular rings;

[0016] The first mica fixing piece and the second mica fixing piece are respectively provided with equidistant clamping grooves;

[0017] The heating wires comprise first heating wires and second heating wires, the first heating wires and the second heating wires are wound through the clamping grooves of the first mica fixing piece to the clamping grooves of the second mica fixing piece,

[0018] The first heating wires and the second heating wires are alternately wound in the clamping grooves of the first mica fixing piece and the second mica fixing piece, and the power of the first heating wires is different from that of the second heating wires.

[0019] The power ratio of the first heating wires to the second heating wires is 1:1.5 to 1:4.

[0020] The heating core plate comprises a first mica fixing piece and a second mica fixing piece, and the first mica fixing piece and the second mica fixing piece are both semicircular rings;

[0021] The first mica fixing piece and the second mica fixing piece are respectively provided with equidistant clamping grooves;

[0022] The heating wires comprise first heating wires and second heating wires, the first heating wires are wound in the clamping grooves of the first mica fixing piece, and the second heating wires are wound in the clamping grooves of the second mica fixing piece;

[0023] The power of the first heating wires is the same as that of the second heating wires.

[0024] The upper cover is provided as a concave arc, and the heating core plate is in contact with the inner surface of the upper cover.

[0025] The mica insulation sheet is provided with a plurality of first cutting seams in the radial direction, the length of the first cutting seam is less than the radius of the mica insulation sheet, and the first cutting seam extends from the outer circumference of the mica insulation sheet to the center of the mica insulation sheet.

[0026] A second cutting slit is arranged between the two first cutting slits, the length of the second cutting slit is less than the length of the first cutting slit, and the second cutting slit extends from the outer periphery of the mica insulating sheet to the center of the mica insulating sheet.

[0027] A heat insulation layer is arranged between the insulating layer and the cover.

[0028] Another application purpose of the application is achieved by the following scheme, an electric heating device, comprising a heating container and a spray insulation heating disc, the heating container is in contact with the spray insulation heating disc.

[0029] Beneficial effects:

[0030] The utility model discloses a spray insulation heating disc, which comprises a heating container and a heating core plate, the heating container is in contact with the spray insulation heating disc. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the scheme in the present application, the following will be a brief introduction to the drawings needed to be used in the embodiment description of the present application, obviously, the drawings in the following description are some embodiments of the present application, for those skilled in the art, without creative labor, can also obtain other drawings according to these drawings.

[0032] Figure 1 It is a sectional view of the utility model.

[0033] Figure 2 It is a structure schematic view of a heating core plate of the utility model.

[0034] Figure 3 It is a structure schematic view of another heating core plate of the utility model.

[0035] Figure 4 It is an explosion schematic view of the spray insulation heating disc of the utility model.

[0036] Figure 5 It is a structure schematic view of the upper cover of the utility model.

[0037] Explanation of reference signs:

[0038] 1-upper cover,

[0039] 101-ring body, 102-outer reinforcing edge, 103-inner reinforcing edge, 104-through hole, 105-ridges, 106-insulation layer

[0040] 2 - mica insulation sheet, 201 - first cutting slot, 202 - second cutting slot,

[0041] 3 - heating core plate, 301 - clamping groove, 302 - first mica fixing sheet, 303 - second mica fixing sheet, 304 - heating wire, 305 - first heating wire, 306 - second heating wire;

[0042] 4 - cover, 401 - dot-shaped protrusion

[0043] 5 - thermal insulation layer. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the utility model more clearly understood, the following will combine with the drawings and examples, make further detailed description to the utility model. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is used only for the purpose of describing particular embodiments and is not intended to be limiting of the application; the present application will be described with reference to the drawings in which are shown by way of illustration of the application; the terms "comprise", "comprising", "include", "including", "have" and "having" and any variations thereof in the specification and claims are intended to cover both the singular and the plural unless otherwise indicated; the terms "first", "second", and the like in the specification and claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

[0046] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that the embodiments described herein are merely examples from a whole class of comparable embodiments which those skilled in the art will readily appreciate. It is also expressly understood that the terms "an embodiment", "one embodiment", "some embodiments", "another embodiment", "some embodiments" and "other embodiments" do not refer to the same embodiment or to a particular described embodiment, but instead mean at least one. A reference herein to "comprising" or "comprises" or "including" or "includes" means that other steps, features, structures, or characteristics not specifically described can be included.

[0047] In order to make the person skilled in the art better understand the application scheme, the technical scheme in the embodiments of the application will be clearly and completely described below in combination with the drawings.

[0048] A spray insulation heating disc, as shown in Figures 1 to 5 The spray insulation heating disc comprises an upper cover 1, a heating assembly and a cover 4, the heating assembly comprises a heating core plate 3, the heating core plate 3 is located between the upper cover 1 and the cover 4, the upper surface of the heating core plate 3 is in contact with the upper cover 1, a mica insulation sheet 2 is arranged below the heating core plate 3, the mica insulation sheet 2 is in contact with the cover 4,

[0049] The heating core plate 3 is provided with a clamping groove 301 around the periphery, and the heating wire 304 is uniformly arranged in the clamping groove 301,

[0050] The inner surface of the upper cover 1 is sprayed with an insulating layer 106, and the edge of the upper cover 1 is fixedly connected with the cover 4.

[0051] The inner surface of the upper cover 1 is sprayed with an insulating layer 106, which means that the inner surface of the upper cover 1 is entirely sprayed with the insulating layer 106 to a suitable thickness to achieve the insulation performance.

[0052] The upper cover 1 with the insulating layer 106 has good insulation performance, so that when the heating disc contacts the electric heating container during use, no leakage or other safety performance occurs. Even if the upper surface is damaged during use, the insulating layer 106 on the contact surface between the inside and the heating assembly is still effective and has good insulation performance.

[0053] The upper cover 1 with the insulating layer 106 has good thermal conductivity and high thermal conductivity efficiency. In addition, the design of removing the mica insulating sheet further improves the heat conduction effect.

[0054] The upper cover 1 can be made of aluminum or aluminum alloy with a thickness of 0.4-1 mm. Preferably, the thickness is 0.4-0.6 mm.

[0055] The surface of the annular body 101 is provided with a texture 105.

[0056] The surface of the cover 4 is provided with a plurality of point-shaped protrusions 401, the protrusions are arranged along the circumference, and a plurality of rows of point-shaped protrusions 401 are arranged in a staggered manner.

[0057] The thickness of the cover 4 is 0.4-1 mm. Preferably, the thickness is 0.6 mm. The thickness is the thickness of the middle part of the cover 4, and does not include the thickness of the outer reinforcing edge 102 and the inner reinforcing edge 103.

[0058] The upper cover 1 includes an annular body 101, an outer reinforcing edge 102, and an inner reinforcing edge 103. The surfaces of the annular body 101, the outer reinforcing edge 102, and the inner reinforcing edge 103 are provided with an insulating layer 106. The inner reinforcing edge 103 extends downward from the through hole 104 in the middle of the annular body 101 to form. The outer reinforcing edge 102 extends downward from the circumference of the annular body 101 to form. The cover 4 is provided with a circular hole corresponding to the through hole 104, and the heating core plate 3 is provided with a notch corresponding to the inner reinforcing edge 103,

[0059] The outer reinforcing edge 102 is connected to the edge of the cover 4 by edge rolling from the outside to the inside,

[0060] The inner reinforcing edge 103 is connected to the edge of the cover 4 by edge rolling from the inside to the outside.

[0061] The annular body 101, the outer reinforcing edge 102 and the inner reinforcing edge 103 of the upper cover 1 are provided with an insulating layer 106.

[0062] The edge connection is formed by bending the outer reinforcing edge 102 inwardly and the inner reinforcing edge 103 outwardly, which does not damage the insulating layer 106 and does not affect the insulation performance.

[0063] After the upper cover 1 and the cover 4 are fixed, the heating assembly is firmly constrained between the upper cover 1 and the cover 4 and does not displace.

[0064] The outer reinforcing edge 102 and the inner reinforcing edge 103 can significantly enhance the overall rigidity and strength of the upper cover 1 and do not cause deformation of the upper cover 1 during use and processing.

[0065] The outer surface of the annular body 101 is provided with a texture 105, the texture 105 is attached with the insulating layer 106, and the texture 105 is distributed on the surface of the annular body 101, which can maintain good structural rigidity and processing performance even when the thickness of the annular body 101 is very low, and is convenient for processing.

[0066] The heating core plate 3 of the utility model includes three kinds,

[0067] The heating core plate 3 includes a first mica fixed sheet 302 and a second mica fixed sheet 303, and the first mica fixed sheet 302 and the second mica fixed sheet 303 are both semicircular annular;

[0068] The first mica fixed sheet 302 and the second mica fixed sheet 303 are respectively provided with equidistant clamping grooves 301;

[0069] The first kind is provided with one heating wire 304, and the heating wire 304 is wound into the first mica fixed sheet 302 and wound out of the clamping groove 301 of the second mica fixed sheet.

[0070] The second kind is:

[0071] The heating wire 304 includes a first heating wire 305 and a second heating wire 306, and the first heating wire 305 and the second heating wire 306 are wound to the clamping groove 301 of the second mica fixed sheet 303 through the clamping groove 301 of the first mica fixed sheet 302,

[0072] The first heating wire 305 and the second heating wire 306 are staggered and wound in the clamping groove 301 of the first mica fixed sheet 302 and the second mica fixed sheet 303, and the power of the first heating wire 305 is different from that of the second heating wire 306.

[0073] The power ratio of the first heating wire 305 to the second heating wire 306 is 1:1.5 to 1:4.

[0074] The heating wire 304 structure in the above manner can simultaneously realize different power control and reduce the difficulty of voltage control.

[0075] That is, the heating core plate 3 has three modes of use, the first group of heating wires 304 heat, the second group of heating wires 304 heat, and the first and second groups of heating wires 304 heat at the same time, so that the electric heating product can have different functions, and the power control of different functions is convenient.

[0076] Third:

[0077] The heating wire 304 includes a first heating wire 305 and a second heating wire 306, the first heating wire 305 is wound on the clamping groove 301 of the first mica fixed sheet 302, and the second heating wire 306 is wound on the clamping groove 301 of the second mica fixed sheet 303.

[0078] The power of the first heating wire 305 is the same as that of the second heating wire 306.

[0079] The two-piece heating disc of the application can independently control the heating of the half area, and is especially suitable for hot pot or baking tray products, can be used for power adjustment in different areas, and makes the electric heating product more diverse.

[0080] The heating disc structure of the application can also be compatible with different structural shapes.

[0081] The heating disc is provided in a upward protruding shape or a horizontal shape and a downward concave shape. Different scenes are considered.

[0082] The application also includes a wiring terminal and a support leg structure.

[0083] The upper cover 1 is provided in a downward concave arc shape, and the heating core plate 3 is in contact with the inner surface of the upper cover 1.

[0084] The mica insulating sheet 2 is provided with a plurality of first cutting seams 201 in the radial direction, the length of the first cutting seam 201 is less than the radius of the mica insulating sheet 2, and the first cutting seam 201 extends from the outer periphery of the mica insulating sheet 2 to the center of the mica insulating sheet 2.

[0085] A second cutting seam 202 is arranged between the two first cutting seams 201, the length of the second cutting seam 202 is less than the length of the first cutting seam 201, and the second cutting seam 202 extends from the outer periphery of the mica insulating sheet 2 to the center of the mica insulating sheet 2.

[0086] The cutting of the mica insulating sheet 2 can greatly adapt to the arc-shaped upper cover 1 and the heating core plate 3 structure, and avoid the occurrence of contact gap, which causes insulation failure.

[0087] A heat insulation layer 5 is arranged between the insulating layer and the cover 4.

[0088] A heat insulation layer 5 can be arranged to prevent the heat of the heat-generating core plate 3 from being further conducted downward and burning the peripheral auxiliary components through the cover 4.

[0089] The electric heating device comprises a heating container and a sprayed insulating heating plate, and the heating container is in contact with the sprayed insulating heating plate.

[0090] The electric heating container can be in the form of a circular arc-shaped pot liner or a frying pan.

[0091] Obviously, the above-described embodiments are only some of the embodiments of the present application, but not all the embodiments. The preferred embodiments of the present application are shown in the drawings, but do not limit the patent scope of the present application. The present application can be implemented in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or make equivalent replacements to some of the technical features. Any equivalent structure made by using the content of the specification and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A spray-on insulating heating disc, characterized by: The application relates to a heating device, which comprises an upper cover, a heating assembly and a cover, the heating assembly comprises a heating core plate, the heating core plate is located between the upper cover and the cover, the upper surface of the heating core plate is in contact with the upper cover, a mica insulating sheet is arranged below the heating core plate and is in contact with the cover, a clamping groove is arranged around the heating core plate, and a heating wire is arranged in the clamping groove. The inner surface of the upper cover is sprayed with an insulating layer, and the edge of the upper cover is fixedly connected with the cover. The upper cover comprises a circular ring body, an outer reinforcing edge and an inner reinforcing edge, the inner surfaces of the circular ring body, the outer reinforcing edge and the inner reinforcing edge are sprayed with insulating layers, the inner reinforcing edge is formed by extending downwards from a through hole in the middle of the circular ring body, the outer reinforcing edge is formed by extending downwards from the circumference of the circular ring body, the cover is provided with a circular hole corresponding to the through hole, and the heating core plate is provided with a notch corresponding to the inner reinforcing edge.

2. A spray-on insulating heater tray according to claim 1 wherein: The outer reinforcing edge is connected with the edge of the cover by edge rolling from the outside to the inside. The inner reinforcing edge is connected with the edge of the cover by edge rolling from the inside to the outside. The heating core plate comprises first and second mica fixing sheets, and the first and second mica fixing sheets are both semicircular ring-shaped.

3. A spray-on insulating heater tray according to claim 1 wherein: The first and second mica fixing sheets are respectively provided with equidistant clamping grooves. The heating wire comprises first and second heating wires, the first and second heating wires are wound through the clamping grooves of the first and second mica fixing sheets. The first and second heating wires are wound in the clamping grooves of the first and second mica fixing sheets in an interlaced manner, and the power of the first heating wire is different from that of the second heating wire. The power ratio of the first and second heating wires is 1:1.5 to 1:

4.

4. A spray-on insulating heater tray according to claim 3, wherein, The heating core plate comprises first and second mica fixing sheets, and the first and second mica fixing sheets are both semicircular ring-shaped.

5. A spray-on insulating heater tray according to claim 1 wherein: The first and second mica fixing sheets are respectively provided with equidistant clamping grooves. The heating wire comprises first and second heating wires, the first heating wire is wound in the clamping groove of the first mica fixing sheet, and the second heating wire is wound in the clamping groove of the second mica fixing sheet. The power of the first heating wire is the same as that of the second heating wire. The upper cover is arranged in a concave arc shape, and the inner surface of the upper cover is in contact with the heating core plate.

6. A spray-on insulating heater tray according to claim 1 wherein: The mica insulating sheet is provided with a plurality of first cutting seams in the radial direction, the length of the first cutting seam is smaller than the radius of the mica insulating sheet, and the first cutting seam extends from the outer periphery of the mica insulating sheet to the center of the mica insulating sheet.

7. A spray-on insulating heater tray according to claim 6 wherein: A second cutting seam is arranged between two first cutting seams, the length of the second cutting seam is smaller than that of the first cutting seam, and the second cutting seam extends from the outer periphery of the mica insulating sheet to the center of the mica insulating sheet.

8. A spray-on insulating heater tray according to claim 7, wherein: A heat insulation layer is arranged between the insulating layer and the cover.

9. A spray-on insulating heater tray according to claim 1 wherein: The thickness of the circular ring body is 0.4-1 mm, and the surface of the circular ring body is provided with a texture.

10. A spray-on insulating heater tray according to claim 2 wherein: The surface of the cover is provided with a plurality of dot-shaped protrusions, the protrusions are arranged along the circumference, and a plurality of rows of dot-shaped protrusions are arranged in an interlaced manner.

11. A spray-on insulating heater tray according to claim 1 wherein: ​ 12. An electrothermal device, characterized by: A heating container comprising the sprayable insulated heat disc according to any one of claims 1 to 11, wherein the heating container is in contact with the sprayable insulated heat disc.

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