CN211606829U - Electric heating unit and electric baking tray - Google Patents

Abstract

The utility model discloses an electrical heating unit and electric baking tray, wherein the electrical heating unit includes substrate, its characterized in that: the heating film is coated on at least one area of the back surface of the base material, at least two conducting films serving as power supply ends are arranged on the edge of the heating film, the conducting films are overlapped with the combination area of the heating film and are electrically connected with the combination area of the heating film, and high-temperature-resistant insulating films are coated on the surfaces of the heating film and the conducting films. The utility model has the advantages that: the heating is quicker and the temperature is more balanced.

Description

Electric heating unit and electric baking tray

Technical Field

The utility model belongs to the technical field of infrared electric heat, a electrical heating unit and electric baking tray is related to.

Background

Graphene is a new material with a single-layer sheet structure formed by carbon atoms, and because the safety performance and the electric-thermal conversion efficiency of the graphene are the highest among all electric heating elements, the electric-thermal conversion efficiency is close to 100%, and almost no energy loss in the forms of mechanical energy, light energy, chemical energy and the like exists.

The graphite alkene electric heat membrane technique is applied to the aerospace industry at first, along with the continuous maturity and the development of technique, turns into civilian gradually, and graphite alkene electric heat membrane product has possessed a lot of advantages. First, self-limiting temperature characteristics: the electric heating film has the self-limiting temperature characteristic, and even if the temperature controller is in a failure state, the electric heating film can not generate the phenomenon of overhigh temperature, so that the use is safer. And a second printing process: the electric heat membrane adopts screen printer, and the precision of printing has been very even, can not be because of the emergence of the puncture accident of striking sparks that membrane body self generates heat inhomogeneous and lead to. Graphene is a good conductor of electricity and heat, can play a role in conducting electricity when applied to a heating film, and is combined with other components such as resin to form a resistance part to generate heat after being electrified. On the other hand, the graphene can rapidly transfer heat to the temperature imbalance part after the heating film generates heat. The graphene heating film takes the whole film as a heating surface (different from other resistance wire heating films), so that the heating is quicker and the temperature is more balanced.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides an electric heating unit with quicker heating and more balanced temperature and an electric baking tray applying the electric heating unit,

the utility model adopts the technical proposal that:

an electrical heating unit comprising a substrate, characterized in that: the heating film is coated on at least one area of the back surface of the base material, at least two conducting films serving as power supply ends are arranged on the edge of the heating film, the conducting films are overlapped with the combination area of the heating film and are electrically connected with the combination area of the heating film, and high-temperature-resistant insulating films are coated on the surfaces of the heating film and the conducting films.

Further, the heating film is a graphene heating film, and 0.1-30% of component far infrared emission agent is added into the graphene heating film. The utility model discloses an infrared and far infrared heat energy are launched to the heating film, and except having the heat-conduction of contact with food, heat radiation conduction in addition simultaneously, the heating is rapid.

Further, the base material is in a plane plate shape, a curved plate shape or a structure with one flat plate and the other surface being in a special-shaped curved surface shape, the base material is made of high-temperature-resistant microcrystalline glass, ceramic or quartz glass, and the thickness of the base material is 0.5-10 mm. The base material can obtain different shapes in a mould pressing mode, and is suitable for different product shapes. The microcrystalline glass has the characteristics of zero expansion coefficient, high mechanical strength, chemical stability, good thermal stability, high temperature resistance, thermal shock resistance, wear resistance, low dielectric loss, strong dielectricity, unidirectional heat conduction and the like, is very suitable for being used as a heating plate, is widely applied to life, such as an electromagnetic oven, a liquid gas stove table top and the like, and has the preferable thickness of 4 mm. The front surface of the microcrystal plate is used as a frying and baking surface, secondary conduction does not exist, and the microcrystalline glass is clean and environment-friendly and has the advantages of being natural, non-sticky and easy to clean.

Further, the heating film, the conductive film and the insulating film are coated on the surface of the base material through a screen printing process, and are baked and cured at the furnace temperature of 650 ℃.

Further, an oil drain port is formed in one side of the base material.

The utility model provides an electric baking tray, includes base, center and base fixed connection, be provided with the control unit in the base, connect oily box, thermal-insulated reflection unit and base lid, its characterized in that: the electric heating unit is fixedly connected to the middle frame, an annular groove is formed in the edge of the back face of the inner step of the middle frame and/or the edge of the back face of the electric heating unit, and the electric heating unit and the middle frame are connected in an adhesive mode at the annular groove.

Further, the center includes panel and frame, and panel and frame are the metal material, the panel periphery is to the turn-ups of back, the frame outwards forms a protruding turn-ups along, two liang of alignments of turn-ups face of panel and frame are in the same place through spot welding or argon arc welded fastening, form a center structure that has intensity, the center bottom is opened, inside is formed with interior step on the panel, an oil drain hole is seted up to the position that interior step corresponds the oil drain port, connect the oil box to set up in the below of oil drain hole. The minimum width of the oil drain hole is not less than 3mm, and the panel and the outer frame are made of metal materials, preferably stainless steel materials.

Further, thermal-insulated reflecting unit includes high temperature resistant mica plate, thermal-insulated heat preservation cotton and reflecting plate, the reflecting plate passes through stamping forming, forms a recess, thermal-insulated heat preservation cotton is established between the recess of mica plate and reflecting plate, mica plate and reflecting plate pass through rivet fixed connection and are a subassembly, thermal-insulated reflecting unit's mica plate face is installed towards the heating film coating face of electrical heating unit, mica plate and heating film coating face distance are fixed to keep more than 3mm at least, and such purpose can be more effectively with the heat, especially with infrared and far infrared heat once more reflect on microcrystalline glass heating unit. The preferred reflecting plate is an aluminum-plated plate, which reflects infrared rays and far infrared rays more effectively.

Further, the control unit includes automatically controlled board, control knob, power cord, pilot lamp, connecting wire, temperature probe, kick temperature controller, the power cord is connected to automatically controlled board, be provided with control knob and pilot lamp on the automatically controlled board, temperature probe passes through pin connection on the automatically controlled board, the temperature probe end with the installation is hugged closely to electrical heating unit's heating film and insulating film coating face, the connecting wire is drawn forth from automatically controlled board end, divide into live wire and zero line, and the live wire is connected to kick temperature controller input earlier, draws forth the connecting wire from kick temperature controller output again and arrives electrical heating unit's conductive film electric connection, the zero line of connecting wire and electrical heating unit's conductive film electric connection.

Furthermore, the upper surface of the electric heating unit is lower than the upper surface of the middle frame, and the end surface provided with the oil outlet is 0.5-5mm lower than the other end.

The utility model has the advantages that: the heating is quicker and the temperature is more balanced.

Drawings

Fig. 1 is a schematic front structural view of the electric heating unit of the present invention.

Fig. 2 is a first structural schematic diagram of the back of the electric heating unit of the present invention.

Fig. 3 is a second structural schematic diagram of the back of the electric heating unit of the present invention.

Fig. 4 is a schematic front structural view of the electric baking tray of the present invention.

Fig. 5 is a schematic cross-sectional view of the electric baking tray of the present invention.

Fig. 6 is an exploded schematic view of the electric baking tray of the present invention.

Detailed Description

The present invention will be further described with reference to the following specific embodiments, but the present invention is not limited to these specific embodiments. It will be recognized by those skilled in the art that the present invention encompasses all alternatives, modifications, and equivalents as may be included within the scope of the claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

Referring to fig. 1 and 2, the present embodiment provides an electric heating unit, which includes a substrate 11, a heating film 14 coated on a back surface 12 of the substrate 11, two conductive films 13 and 131 as power supply terminals disposed on edges of a coating region of the heating film 14, the conductive films 13 overlapping and electrically connected to a bonding region of the heating film 14, and a high temperature resistant insulating film 15 coated on the heating film 14 and the conductive films 13. One of the conductive films 131 serves as a live line.

In this embodiment, the heating film 14 is a graphene heating film, and 0.1-30% of a far infrared emitting agent is added to the graphene heating film. The utility model discloses an infrared and far infrared heat energy are launched to heating film 14, and except having the heat-conduction of contact with food, heat radiation conduction in addition simultaneously, the heating is rapid.

The substrate 11 of this embodiment is a planar plate-shaped microcrystalline glass, which has the characteristics of zero expansion coefficient, high mechanical strength, chemical stability, good thermal stability, high temperature resistance, thermal shock resistance, wear resistance, low dielectric loss, ferroelectric property, unidirectional heat conduction, and the like, is very suitable for being used as a heating plate, and is widely used in life, such as an induction cooker, a liquid gas cooking stove top, and the like, and the preferred thickness of the microcrystalline glass plate is 4 mm; and the front surface of the microcrystalline board is used as a frying and baking surface, so that secondary conduction does not exist, and the microcrystalline glass is clean and environment-friendly and has the advantages of being natural, non-sticky and easy to clean. In order to adapt to different product shapes, the base material can also be a curved plate or a flat plate with one surface and the other surface in a special-shaped curved surface shape, and the ceramic or quartz glass material with different shapes can be obtained by a mould pressing mode, wherein the thickness of the base material is 0.5-10 mm.

The heating film 14, the conductive film 13 and the insulating film 15 of the present embodiment are coated on the surface of the substrate by a screen printing process, and are baked and cured at an oven temperature of 650 ℃.

The base material 11 of this embodiment is provided with an oil drain port 16 on one side. Of course, the oil drain port 16 may not be provided, and a gap may be provided on one side of the electric heating unit during installation.

Example two

Referring to fig. 3, the present embodiment is different from the first embodiment in that: the number of the coating areas is two, three conductive films 13, 131 and 132 are arranged at the edge and the middle of the coating area of the heating film 14 as power supply terminals, and the conductive films 13, 131 and 132 are overlapped with the combination area of the heating film 14 and are electrically connected.

The conductive film 13 arranged in the middle is used as a tap combination, the conductive film 131 on the left is used as a live wire 1, and the conductive film 131 on the right is used as a live wire 2; when the left conductive film 131 and the conductive film 13 are combined and electrified, only the left area is heated, and when the conductive film 13, the left conductive film 131 and the right conductive film 132 are combined and electrified, the left area and the right area are heated simultaneously.

The remaining structure and function may be as described with reference to embodiment one.

EXAMPLE III

Referring to fig. 4 to 6, the present embodiment provides an electric baking tray, including a base 3 and a middle frame 2, the middle frame 2 is fixedly connected to the base 3, a control unit 4, an oil receiving box 5, a heat insulation reflection unit 6 and a base cover 7 are disposed in the base 3, the electric heating unit 1 according to the first embodiment or the second embodiment is fixedly connected to the middle frame 2, an annular groove is disposed on an inner step of the middle frame 2 and/or a back edge of the electric heating unit 1, an annular groove 211 is disposed on the inner step of the middle frame 2, and the electric heating unit 1 and the middle frame 2 are adhesively connected at the annular groove 211 by a single component adhesive.

This embodiment the center includes panel 21 and frame 22, and panel 21 and frame 22 are the metal material, the panel 21 periphery is the turn-ups to the back, frame 22 outwards forms a protruding turn-ups along the turn-ups, two liang of alignments of turn-ups face of panel 21 and frame 22 to in the turn-ups along A department through spot welding or argon arc welded fastening together, form a center structure that has intensity, 2 bottoms of center are opened. An oil discharge hole 212 is formed in a step surface formed in the panel 21 on the middle frame 2, the oil discharge hole 212 is arranged right opposite to the oil discharge port 16, the minimum width of the oil discharge hole 212 is not less than 3mm, and an oil receiving box 5 is correspondingly arranged at the lower part of the oil discharge hole 212. The panel 21 and the outer frame 22 are made of stainless steel.

In the embodiment, because the electric heating unit 1 adopts the microcrystalline glass plate as the electric baking tray of the heating element, the whole machine can be flattened, the structure is small and exquisite and thin, the flat heat insulation reflecting unit 6 in the base 3 also comprises a high temperature resistant mica plate 61, heat insulation cotton 62 and a reflecting plate 63, the reflecting plate 63 is formed into a groove by punch forming, the heat insulation cotton 62 is arranged between the mica plate 61 and the reflecting plate 63 groove, the mica plate 61 and the reflecting plate 63 are fixedly connected into a component through rivets, the mica surface of the heat insulation reflecting unit 6 is arranged towards the heating film coating surface of the electric heating unit 1, the distance between the mica plate 61 and the heating film coating 15 surface is fixedly kept to be at least 3mm, the purpose of this is to reflect heat, especially infrared and far infrared heat, again to the glass ceramic heating unit more efficiently. The preferred reflecting plate is an aluminum-plated plate, which reflects infrared rays and far infrared rays more effectively.

The control unit 4 of this embodiment includes an electric control board 41, a control knob 42, a power line 43, an indicator 44, a connecting line 45, a temperature probe 46, and a kick temperature controller 47, the connecting sequence is that the power line 43 is connected to the electric control board 41, the electric control board 41 is provided with a control knob 42 and an indicator light 44, the temperature probe 46 is connected to the electric control board 41 through a lead, the end of the temperature probe 46 is closely attached to the coating surface of the heating film 14 and the insulating film 15 of the electric heating unit 1, the connecting wire 45 is led out from the end of the electric control board 41 and is divided into a live wire 451 and a neutral wire 452, the live wire 451 is connected to the input end 471 of the kick temperature controller 47, and then the connecting wire is led out from the output end 472 of the kick temperature controller 47 to be electrically connected with the conductive film 131 and/or the conductive film 132 of the electric heating unit 1, the zero line 452 of the connecting wire 45 is electrically connected to the conductive film 13 of the electric heating unit 1.

In this embodiment, the temperature probe 46 is a K-type or J-type probe, because the temperature of the probe near the heating plate can reach 300 degrees, the common glass tube thermistor cannot be contacted, preferably, the K-type or J-type probe, the temperature sensing end surface of the kick temperature controller 47 is closely attached to the surface of the reflection plate 63, the contact surface of the kick temperature controller 47 and the reflection plate 63 is coated with heat conducting grease, and the kick temperature controller 47 is fixedly connected together in a mechanical manner, the limit value of the kick temperature controller 47 is 85-150 degrees, and the preferred limit value of the temperature is 125 degrees.

In order to ensure the safe use of the electric appliance, a temperature fuse 48 is also connected in series with the live wire 45 of the connecting wire, the limit value of the temperature fuse 48 is 125-350 ℃, the temperature fuse 48 is closely attached to the coating surfaces of the heating film 14 and the insulating film 15 of the electric heating unit 1, and the preferred limit value of the temperature is 191 ℃.

In order to meet the requirements of consumers in different markets, the European market prefers a base shell made of plastic as a raw material in terms of selection of materials of the base 3 and the base cover 7, the Asian market prefers a base shell made of natural bamboo boards or wood boards, and the bamboo boards and the wood boards overcome various difficulties in processing technology and develop a base and a shell which are simple in appearance, natural and safe, attractive and elegant, and well-sought by consumers.

In the present embodiment, a large amount of grease may overflow when the meat is cooked by the electric grill, and in order to effectively discharge the grease, the end of the oil drain hole is lower than the corresponding end by 0.5-5mm, which may be set to 2mm according to the situation. Meanwhile, the upper surface of the electric heating unit 1 is lower than the upper surface of the middle frame 2, so that the grease can be prevented from splashing outwards.

Claims (10)

1. An electrical heating unit comprising a substrate, characterized in that: the heating film is coated on at least one area of the back surface of the base material, at least two conducting films serving as power supply ends are arranged on the edge of the heating film, the conducting films are overlapped with the combination area of the heating film and are electrically connected with the combination area of the heating film, and high-temperature-resistant insulating films are coated on the surfaces of the heating film and the conducting films.

2. An electrical heating unit as claimed in claim 1, wherein: the heating film is a graphene heating film.

3. An electrical heating unit as claimed in claim 1, wherein: the base material is a plane plate-shaped, curved plate-shaped or one-surface flat plate and the other-surface special-shaped curved surface-shaped structure, the base material is made of high-temperature-resistant microcrystalline glass, ceramic or quartz glass, and the thickness of the base material is 0.5-10 mm.

4. An electrical heating unit as claimed in claim 1, wherein: the heating film, the conductive film and the insulating film are coated and solidified on the surface of the base material through a screen printing process.

5. An electric heating unit as claimed in any one of claims 1 to 4, characterized in that: an oil drain port is formed in one side of the base material.

6. The utility model provides an electric baking tray, includes base, center and base fixed connection, be provided with the control unit in the base, connect oily box, thermal-insulated reflection unit and base lid, its characterized in that: the electric heating unit as claimed in any one of claims 1 to 5 is fixedly connected to the middle frame, an annular groove is formed in the inner step of the middle frame and/or the edge of the back face of the electric heating unit, and the electric heating unit and the middle frame are connected in an adhesive mode at the annular groove.

7. The electric grill pan of claim 6 wherein: the center includes panel and frame, and panel and frame are the metal material, the panel periphery is to the turn-ups of back, the frame outwards forms a protruding turn-ups along, two liang of alignments of turn-ups face of panel and frame are in the same place through spot welding or argon arc welded fastening, form a center structure that has intensity, the center bottom is opened, inside is formed with interior step on the panel, an oil drain hole is seted up to the position that interior step corresponds the oil drain port, connect the oil box to set up in the below of oil drain hole.

8. The electric grill pan of claim 6 wherein: the heat insulation reflection unit comprises a high temperature resistant mica plate, a heat insulation cotton and a reflection plate, the reflection plate is formed by punch forming to form a groove, the heat insulation cotton is arranged between the mica plate and the groove of the reflection plate, the mica plate and the reflection plate are fixedly connected into a component through rivets, the mica plate surface of the heat insulation reflection unit is arranged towards the heating film coating surface of the electric heating unit, and the distance between the mica plate and the heating film coating surface is fixedly kept to be more than 3 mm.

9. The electric grill pan of claim 6 wherein: the control unit includes automatically controlled board, control knob, power cord, pilot lamp, connecting wire, temperature probe, kick temperature controller, the power cord is connected to automatically controlled board, be provided with control knob and pilot lamp on the automatically controlled board, temperature probe passes through pin connection on the automatically controlled board, the temperature probe end with the installation is hugged closely to electrical heating unit's heating film and insulating film coating surface, the connecting wire is drawn forth from automatically controlled board end, divide into live wire and zero line, and the live wire is connected to kick temperature controller input earlier, draws forth the connecting wire from kick temperature controller output again and arrives electrical heating unit's conductive film electric connection, the zero line of connecting wire and electrical heating unit's conductive film electric connection.

10. The electric grill pan of claim 6 wherein: the upper surface of the electric heating unit is lower than the upper surface of the middle frame, and the end surface provided with the oil discharge port is 0.5-5mm lower than the other end.

Images