CN111836412A - Metal heating body and metal heating device - Google Patents
Metal heating body and metal heating device Download PDFInfo
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- CN111836412A CN111836412A CN202010830332.8A CN202010830332A CN111836412A CN 111836412 A CN111836412 A CN 111836412A CN 202010830332 A CN202010830332 A CN 202010830332A CN 111836412 A CN111836412 A CN 111836412A
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- heating
- metal
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- layer
- insulating
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
Abstract
The invention discloses a metal heating body and a metal heating device, which comprise a metal base material and an electric heating layer, wherein the electric heating layer is provided with a heating area and an insulating area, the insulating area isolates the heating area from the metal base material, the metal heating body is provided with at least two electrode layers, and at least parts of the at least two electrode layers are arranged in the heating area or positioned at two ends of the heating area. The electric heating layer of the metal heating body is provided with a heating area and an insulating area, and the insulating area and the heating area form a layer of structure, so that the structure is stable, the metal heating body can not easily fall off or crack under high and low temperature impact, and the performance is stable.
Description
Technical Field
The invention relates to the field of electric heating, in particular to a metal heating body and a metal heating device.
Background
Common electric heating products adopt a resistance wire heating mode or a film heating mode. The heating component using resistance wire as heating mode is made up by using magnesium powder, etc. and sealing and filling it in metal tube, and heating the fluid by means of heating tube. The heating component adopting the film heating mode is characterized in that a metal resistance film is printed on the heating component, an insulating layer needs to be printed before the metal resistance film is printed, the metal resistance film needs to be printed and sintered for multiple times, and a multi-layer printing structure is easy to crack and peel after multiple times of cold and heat impact.
Disclosure of Invention
The invention aims to provide a metal heating body and a metal heating device which are resistant to high and low temperature impact and have a stable structure.
In order to realize the purpose, the following technical scheme is adopted: the metal heating body is provided with two electrode layers, one part of the insulating region is positioned between the electrode layers and the metal base material, at least one part of one electrode layer is electrically connected with one end of the heating region, and at least one part of the other electrode layer is electrically connected with the other end of the heating region.
The insulating region is different from the heating region in material, and the insulating region comprises a fusion region in which the same material as the heating region is fused.
The metal base material comprises a metal tube or a metal plate or a metal sheet, and the thickness of the metal base material is 0.05-3 mm; the electric heating layer covers the surface of the metal base material in a continuous and uninterrupted mode, and the heating area covers the metal base material in a continuous and uninterrupted mode.
The resistance coefficient of the heating area of the metal heating body is 85-115%, and the resistance coefficient refers to the ratio of the working resistance to the normal temperature resistance.
The diameter of the metal pipe is 6-80mm, the heating power of the heating zone of the metal heating body is 200-10000W, and the power density of the heating zone of the metal heating body is 30-180W/cm2。
The thickness of the fusion zone is in the range of 0.1-10 μm, the thickness of the heating zone is in the range of 1-30 μm, and the thickness of the insulating zone is in the range of 10-210 μm.
The heating zone comprises a ZO metal oxide nano heating material, a LiO metal oxide nano heating material, a ZnO metal oxide nano heating material and In2O3Metal oxide nano heating material, SnO2Metal oxide nano heating material, Ca2InO4Metal oxide nano heating material, graphene nano heating material, nano silver heating materialAt least one of them.
The insulating region comprises a non-metallic sinter-curable glass body or an organic coating material.
The metal heating body further comprises an electric insulating layer, and the electric insulating layer covers the heating area;
the metal heating body further comprises a sintered coating, the sintered coating is made of negative temperature coefficient resistance performance materials, the sintered coating is located on the electric insulation layer, and the sintered coating of the negative temperature coefficient resistance performance materials is an NTC performance sintered coating.
In order to realize the purpose, the following technical scheme is adopted: the metal heating device comprises a fixing frame and the metal heating body according to the technical scheme, wherein the metal heating body is a metal pipe, the metal heating body is fixed on the fixing frame, the metal heating device is provided with an inlet and an outlet, and the inlet is communicated with the outlet and the inner cavity of the metal pipe.
The metal heating body of the technical scheme comprises a metal base material and an electric heating layer, wherein the electric heating layer is fixed with the metal base material, the electric heating layer is provided with a heating area and an insulating area, and the heating area and the insulating area are of an integrated structure and are stable in structure, so that the metal heating body can be impacted at high and low temperatures, is not easy to fall off and crack and is stable in performance.
Drawings
Fig. 1 is a schematic structural view of one embodiment of the metal heating body of the present invention;
fig. 2 is a schematic cross-sectional view of one embodiment of the metal heating body of the present invention;
fig. 3 is a schematic sectional view of another embodiment of the metal heating body of the present invention;
fig. 4 is a schematic sectional view of yet another embodiment of the metal heating body of the present invention;
FIG. 5 is a schematic structural diagram of a conventional film heating tube;
FIG. 6 is a schematic diagram of a prior art film heater chip;
FIG. 7 is a schematic view of a metal heating apparatus according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1-4, fig. 1 illustrates a schematic structural diagram of a metal heating body, the metal heating body includes a metal substrate 1 and an electric heating layer 2, the electric heating layer 2 is fixed to the metal substrate 1, and the fixing of the two layers means that the electric heating layer does not fall off after being attached to the metal substrate 1 and keeps the two layers as an integral structure.
The electric heating layer 2 has a heating region 23 and an insulating region 21 in a direction away from the metal substrate, the insulating region 21 and the heating region 23 are of an integral structure, the insulating region 21 isolates the heating region 23 from the metal substrate 1, and the integral structure of the insulating region 21 and the heating region 23 refers to a structure in which the insulating region 21 and the heating region 23 are of the same layer. The direction away from the metal base material refers to the direction radiating outward with the metal base material as the center.
The metal heating body further has two electrode layers 3, a portion of the insulating region 21 being located between the electrode layers 3 and the metal substrate 1, wherein at least a portion of one electrode layer 3 is electrically connected to one end of the heating region 23, and at least a portion of the other electrode layer 3 is electrically connected to the other end of the heating region. Of course, when the metal heating body is made of metal plate or metal sheet, and the heating region 23 is in a circular, square or other irregular structure, one end of the heating region represents one part of the circular, square or other irregular structure, and the other end of the heating region represents the other part of the circular, square or other irregular structure. The number of the electrode layers 3 may be 3 or more.
The insulating region 21 is different from the heating region 23 in material, and the insulating region 21 includes a fusion region 22 in which the same material as that of the heating region 23 is fused into the fusion region 22.
The formation of the electrothermal layer 2 includes fixing an insulating material on the metal substrate by screen printing to form an insulating blank layer, combining a nano heating material with the insulating material of a part of the insulating blank layer by vacuum evaporation or vapor deposition or ion sputtering or plasma plating to form the electrothermal layer, wherein the electrothermal layer includes an insulating region 21 and a heating region 23. Because the insulating region 21 has the fusion region 22, because the nanometer heating material fuses with the insulating material in the fusion region 22 for insulating region 21, heating zone 23 form a layer of compact structure, and stable in structure makes it can be under high low temperature impact, be difficult to drop, the chap, stable performance.
The metal substrate 1 can be a metal tube, a metal plate, a metal sheet or the like, and the thickness of the metal substrate 1 is 0.05-3 mm; the electrothermal layer 2 covers the metal substrate 1 with a continuous and uninterrupted surface, the heating zone 23 also covers the metal substrate 1 with a continuous and uninterrupted surface, or the heating zone 23 covers the metal substrate 1 in one piece. Herein, one-piece means that the heating regions 23 are not divided and are in a one-piece form. Because the heating zone 23 covers the metal base material 1 in one piece, when the metal heating body is electrified, the whole heating zone 23 is rapidly heated, so that the metal base material 1 covered by the whole heating zone 23 has almost the same temperature, on one hand, the metal base material 1 can uniformly heat the fluid to be heated, on the other hand, the stress of the uniformly heated heating zone 23 on the metal base material 1 is relatively uniform, and the cracking resistance and the deformation prevention of the metal base material 1 are facilitated.
Specifically, when the metal substrate 1 is a metal tube, the electric heating layer 2 can continuously cover the periphery of the metal tube, the electric heating layer 2 is positioned in the middle area of the metal tube, and the covered area of the electric heating layer 2 accounts for 60-90% of the surface area of the metal tube. When the electric heating layer 2 is positioned on the inner surface of the metal pipe, the coating area of the electric heating layer 2 accounts for 60-90% of the inner surface area of the metal pipe, and when the electric heating layer 2 is positioned on the outer surface of the metal pipe, the coating area of the electric heating layer 2 accounts for 60-90% of the outer surface area of the metal pipe.
When the metal substrate 1 is a metal plate or a metal sheet, the electric heating layer 2 can continuously cover the metal plate or the metal sheet, the electric heating layer 2 is positioned in the middle area of the metal pipe, and the covered area of the electric heating layer 2 accounts for 60-90% of the surface area of the metal pipe.
The resistance coefficient of the metal heating body is 85% -95%, wherein the resistance coefficient refers to the ratio of the working resistance to the normal temperature resistance. For example, when the metal heater is not operated, the resistance is R1, and when the metal heater is heated by energization, the operating resistance is R2, and the resistivity is R2/R1, and the resistivity of the metal heater is close to 1, so that the heating efficiency of the metal heater during heating can be high, and the temperature control of the metal heater can be facilitated since the resistance change of the metal heater during operation and at room temperature is not large.
The power density of the heating zone of the metal heating body can be 5-200w/cm2Within this range, watt density refers to the ratio of power to the area of the heated zone. The power density range is wide, and the method is suitable for more products. When the metal substrate 1 is a metal tube, the diameter of the metal tube is 6-80mm, the heating power of the metal tube can be 200-10000W, and the power density of the heating zone of the metal tube is 30-180W/cm2. The power density is higher for can realize the high power under the less condition of zone of heating area, can realize under the higher power satisfies the required condition of using, very little that metal heating body overall structure can be done, the structure is small and exquisite.
The thickness of the fusion zone 22 of the metal heating body is in the range of 0.1-10 μm, the thickness of the heating zone 23 is in the range of 1-30 μm, and the thickness of the insulation zone 21 is in the range of 10-210 μm. Although the heating region 23 has a thickness in the range of 1-30 μm and a very small thickness, the insulating region 21 has a fusion region 22, and the fusion region 22 has a thickness in the range of 0.1-10 μm, so that the connection between the heating region 23 and the insulating region 21 is strongly ensured, and the electrothermal layer 2 has a stable structure and is not easy to fall off or break. In addition, due to the existence of the fusion area 22, the nano heating material in the fusion area 22 is fused with the insulating material, so that the metal thermal conductivity of the insulating area is improved, the thickness of the insulating area 21 is small and is within the range of 10-210 μm, and thus, the thickness of the electric heating layer 2 is very thin, and the uniformity of the electric heating layer 2 is also facilitated.
The nano-heating material includes, for example, a ZO metal oxide nano-heating material, a LiO metal oxide nano-heating material, a ZnO metal oxide nano-heating material, In2O3Metal oxide nano heating material, SnO2Metal oxide nano heating material, Ca2InO4At least one of a metal oxide nano heating material, a graphene nano heating material and a nano silver heating material.
Specifically, examples of the nano-heating material include a ZO metal oxide nano-heating material, a LiO metal oxide nano-heating material, a ZnO metal oxide nano-heating material, and In2O3Metal oxide nano heating material, SnO2Metal oxide nano heating material, Ca2InO4More than two of metal oxide nano heating materials, graphene nano heating materials and nano silver heating materials. For example, ZO metal oxide nano heating material and Ca2InO4Metal oxide nano-heating material, ZnO metal oxide nano-heating material and In2O3Metal oxide nano-heating material, ZO metal oxide nano-heating material and LiO metal oxide nano-heating material, SnO2Metal oxide nano heating material, Ca2InO4Metallic oxide nano heating material and nano silver heating material, SnO2Metal oxide nano heating material, Ca2InO4Metal oxide nano heating materials, graphene nano heating materials and the like.
Specifically, as an embodiment, the insulating region 21 includes a non-metallic sinter-curable glass body or an organic coating material.
The electrode layer 3 of the electric heating layer 2 is fixed on the electric heating layer 2 by screen printing and sintering silver paste, and the sintering temperature is 120-180 ℃. Referring to fig. 3, the electrode layer 3 may partially cover the heating region 23, so that the electrode layer 3 is preferably electrically connected to the heating region 23. Referring to fig. 2, the electrode layer 3 may be closely attached to the heating region 23, and power may be supplied to the heating region 23 through the electrode layer 3. The distance between the electrode layer 3 and the metal conductive part is far away from the distance between the insulating region 21 and the metal conductive part, so that the electrical safety distance is ensured.
Referring to fig. 4, the metal heating body may further include an electrical insulating layer 4, the electrical insulating layer 4 covering the electrode layer 3 and the heating region 23. The electrically insulating layer 4 is formed by fixing an insulating material to the heating region 23 by screen printing sintering.
The metal heating body further comprises a sintered coating 5, the sintered coating 5 is made of a negative temperature coefficient resistance performance material, the sintered coating 5 is located on the electric insulation layer 4, and the sintered coating 5 made of the negative temperature coefficient resistance performance material is the sintered coating 5 with NTC performance.
In contrast, fig. 5 and 6 are structural views of a conventional thick film type heating film, and the heating means illustrated in fig. 5 and 6 includes a substrate 1 ', a heating film 2', and electrodes 3 ', and the heating films 2' in fig. 5 and 6 are spaced apart from each other. The heating temperature is high in the region where the metal film is provided, and is low in the region where the metal film is not provided, so that the substrate is easily broken, and the uniformity of fluid heating is also poor.
Referring to fig. 7, fig. 7 is a schematic structural view of a metal heating apparatus. The metal heating device comprises a metal heating body 10 and a fixing frame 13, wherein the metal heating body 10 is a metal tube, the metal heating body 10 is fixed on the fixing frame 13, the metal heating device is provided with an inlet 11 and an outlet 12, and the inlet 11 and the outlet 12 are communicated with the inner cavity of the metal tube. The metal heating device can be applied to heating places with various instant heating requirements.
It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that various combinations, modifications and equivalents of the present invention can be made by those skilled in the art, and all technical solutions and modifications thereof without departing from the spirit and scope of the present invention are encompassed by the claims of the present invention.
Claims (10)
1. The metal heating body is characterized by comprising a metal base material and an electric heating layer, wherein the electric heating layer is fixed with the metal base material and is arranged in a direction far away from the metal base material, the electric heating layer is provided with an insulating area and a heating area, the insulating area and the heating area are of an integrated structure, the insulating area isolates the heating area from the metal base material, the metal heating body is further provided with two electrode layers, one part of the insulating area is positioned between the electrode layers and the metal base material, at least one part of one electrode layer is electrically connected with one end of the heating area, and at least one part of the other electrode layer is electrically connected with the other end of the heating area.
2. The metal heater according to claim 1, wherein the insulating region is made of a material different from that of the heating region, and the insulating region includes a fusion region in which a material identical to that of the heating region is fused.
3. The metallic heating body according to claim 1 or 2, characterized in that said metallic base material comprises a metallic tube or a metallic plate or a metallic sheet, said metallic base material having a thickness comprised between 0.05 and 3 mm; the electric heating layer covers the surface of the metal base material in a continuous and uninterrupted mode, and the heating area covers the metal base material in a continuous and uninterrupted mode.
4. The metallic heater according to claim 1 or 2, characterized in that the heating zone of the metallic heater has a resistivity ranging from 85% to 115%, said resistivity being the ratio of the working resistance to the resistance at room temperature.
5. The metal heater as claimed in claim 3, wherein the diameter of the metal tube is 6-80mm, the heating power of the heating zone of the metal heater is 200-10000W, and the power density of the heating zone of the metal heater is 30-180W/cm2。
6. The metal heater according to claim 2, wherein said fusion zone thickness is in the range of 0.1-10 μm, said heating zone thickness is in the range of 1-30 μm, and said insulation zone thickness is in the range of 10-210 μm.
7. The metal heating body according to claim 1 or 2 or 5 or 6, wherein the heating zone comprises a ZO metal oxide nano heating material, a LiO metal oxide nano heating material, a ZnO metal oxide nano heating material, In2O3Metal oxide nano heating material, SnO2Metal oxide nano heating material, Ca2InO4At least one of a metal oxide nano heating material, a graphene nano heating material and a nano silver heating material.
8. Metallic heating body according to claim 1 or 2 or 5 or 6, characterized in that the insulating zone comprises a non-metallic sinter-curable glass body or an organic coating material.
9. The metallic heating body according to claim 1 or 2 or 5 or 6, characterized in that it further comprises an electrically insulating layer covering the heating zone;
the metal heating body further comprises a sintered coating, the sintered coating is made of negative temperature coefficient resistance performance materials, the sintered coating is located on the electric insulation layer, and the sintered coating of the negative temperature coefficient resistance performance materials is an NTC performance sintered coating.
10. A metal heating device, comprising a fixing frame and the metal heating body according to any one of claims 1 to 9, wherein the metal heating body is a metal tube, the metal heating body is fixed on the fixing frame, the metal heating device is provided with an inlet and an outlet, and the inlet and the outlet are communicated with the inner cavity of the metal tube.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830332.8A CN111836412A (en) | 2020-08-18 | 2020-08-18 | Metal heating body and metal heating device |
| PCT/CN2021/113228 WO2022037605A1 (en) | 2020-08-18 | 2021-08-18 | Metal heating body, metal heating device, and metal heating body manufacturing method |
| EP21857697.3A EP4181625A1 (en) | 2020-08-18 | 2021-08-18 | Metal heating body, metal heating device, and metal heating body manufacturing method |
| US18/021,122 US20230328846A1 (en) | 2020-08-18 | 2021-08-18 | Metal heating body, metal heating device, and metal heating body manufacturing method |
| CN202180050338.6A CN116195365A (en) | 2020-08-18 | 2021-08-18 | Metal heating body, metal heating device and manufacturing method of metal heating body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830332.8A CN111836412A (en) | 2020-08-18 | 2020-08-18 | Metal heating body and metal heating device |
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| Publication Number | Publication Date |
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| CN111836412A true CN111836412A (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010830332.8A Pending CN111836412A (en) | 2020-08-18 | 2020-08-18 | Metal heating body and metal heating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022037605A1 (en) * | 2020-08-18 | 2022-02-24 | 芜湖艾尔达科技有限责任公司 | Metal heating body, metal heating device, and metal heating body manufacturing method |
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2020
- 2020-08-18 CN CN202010830332.8A patent/CN111836412A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022037605A1 (en) * | 2020-08-18 | 2022-02-24 | 芜湖艾尔达科技有限责任公司 | Metal heating body, metal heating device, and metal heating body manufacturing method |
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