CN216357368U - Electric heating plate capable of reducing coating falling - Google Patents
Electric heating plate capable of reducing coating falling Download PDFInfo
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- CN216357368U CN216357368U CN202122254762.2U CN202122254762U CN216357368U CN 216357368 U CN216357368 U CN 216357368U CN 202122254762 U CN202122254762 U CN 202122254762U CN 216357368 U CN216357368 U CN 216357368U
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Abstract
The utility model relates to an electric heating plate for reducing coating falling, which is characterized in that: the aluminum substrate is used for heating, a spiral groove is formed in the first surface, which is used for being attached to a heating container and has a heat conduction effect, of the aluminum substrate, the depth of the spiral groove is 0.05-0.3mm, the groove distance is 0.2-1.2mm, the groove width is 0.1-0.6mm, a heat conduction coating is covered on the first surface of the aluminum substrate, part or all of paint of the heat conduction coating is embedded in the spiral groove, and the surface of the paint embedded in the spiral groove is lower than the first surface of the aluminum substrate; the electric heating plate for reducing the coating falling has the advantages of simple structure and low manufacturing cost, and is beneficial to reducing the influence of the heat conduction coating abrasion on the heating efficiency.
Description
The technical field is as follows:
the utility model relates to an electric heating plate for reducing coating falling, which is used for heating a glass container, a steam heating appliance or a cooker and the like.
Background art:
the heating plate in the prior art directly adopts an electric heating pipe, or a stainless steel plate is fixed on the electric heating pipe, or a heating surface with the unevenness smaller than 0.1mm and the smoothness more than 5 is ground on the surface of an aluminum substrate (a third scheme), or a heat-conducting coating containing metal powder materials is coated and printed after the third scheme (the coating thickness is generally 5-15 um), and then the heating plate is baked and molded at high temperature.
The heating surface of the aluminum substrate is easy to scratch in the use process of the third scheme, so that the heating efficiency is influenced; in the fourth scheme, the glass bottom and the like rub the surface of the heating plate with the heat conducting coating when in use, and the coating falls off when in test due to the fact that the glass bottom is very hard (test method: 1300ml of water with the temperature of 20 ℃ is filled in a heating container, the heating container is placed on a heating base with the heating plate to be electrified for working, when the water is boiled, a power supply is cut off, the heating container is naturally placed on the heating base immediately, the heating plate rotates for 45 degrees leftwards and rightwards in 1 cycle of 2 seconds, and after 100 cycles, the coating of the heating plate falls off in a large amount), so that the appearance is influenced, and the heating speed is also influenced (the heating speed is increased from 13 minutes of original heating to boiling to 14-15 minutes).
In order to realize wear resistance of the coating and not influence the heating efficiency, the applicant carries out tests and verifications of various schemes, such as spraying wear-resistant high-temperature ceramic oil or teflon on the heating surface of the aluminum substrate of the third scheme, brazing a stainless steel plate with the thickness of 0.2-0.3mm, researching high-temperature paint with high temperature resistance and wear resistance, processing technology and the like, but the third scheme can not achieve satisfactory effect, or can not achieve the requirement of the heating efficiency, or the coating is easy to drop, or the manufacturing cost is high.
The utility model content is as follows:
in view of the above-mentioned defects in the prior art, an object of the present invention is to provide an electric heating plate with reduced coating layer dropping, which has a simple structure and a low manufacturing cost, and is beneficial to reducing the dropping of the heat-conducting coating layer.
The utility model discloses an electric heating plate for reducing coating falling, which is characterized in that: the aluminum substrate comprises an aluminum substrate for heating, wherein a spiral groove is formed in a first surface, which is used for being attached to a heating container and has a heat conduction effect, of the aluminum substrate, the depth of the spiral groove is 0.05-0.3mm, the groove distance is 0.2-1.2mm, the groove width is 0.1-0.6mm, a heat conduction coating is covered on the first surface of the aluminum substrate, part or all of coating of the heat conduction coating is embedded in the spiral groove, and the surface of the coating embedded in the spiral groove is lower than the first surface of the aluminum substrate.
Furthermore, the first surface flatness tolerance of the aluminum substrate is less than 0.10 mm.
Furthermore, the depth of the spiral groove is 0.10mm, the groove pitch is 0.6mm, and the groove width is 0.35 mm.
Further, the heat conducting coating is formed on the first surface of the aluminum substrate through screen printing or spraying.
Furthermore, the spiral groove is replaced by a concentric circular groove, the depth of the groove is 0.05-0.3mm, the distance of the groove is 0.2-1.2mm, and the width of the groove is 0.1-0.6 mm.
Further, the second surface of the aluminum substrate is provided with an electric heating pipe which is spirally arranged; or the second surface of the aluminum substrate is provided with a spiral channel, and an electric heating pipe is embedded in the channel.
Furthermore, the paint of the heat-conducting coating comprises paint embedded in the spiral groove and paint positioned on the first surface of the aluminum substrate, and the paint embedded in the spiral groove and the paint positioned on the first surface of the aluminum substrate are continuous or discontinuous.
Further, the spiral groove is formed by turning, and the heat-conducting coating is a coating with graphene and heat-conducting metal powder.
Furthermore, the center of the first surface of the aluminum substrate is provided with a circle with the diameter of 10-35mm, the circle is not covered with a heat conduction coating, the shape of the heat conduction coating is in a circle shape, a circular ring shape or a net shape, and the heat conduction coating accounts for 30-100% of the area of the first surface of the aluminum substrate.
Furthermore, the thickness of the aluminum substrate is 2-6mm, and the aluminum substrate is a rectangular or circular plate.
The electric heating plate for reducing the falling of the coating has the advantages that: firstly, the processing technology for processing the spiral groove on the first surface of the aluminum substrate and covering the heat-conducting coating is simple, and the manufacturing cost is low; because part or all of the coating of the heat-conducting coating is embedded in the spiral groove, the contact area between the coating embedded in the spiral groove and the surface of the aluminum substrate is greatly increased, and the coating firmness of the coating is obviously improved; and part of the coating which is not embedded in the spiral groove is embedded in the spiral groove, so that the coating firmness of the coating which is not embedded in the spiral groove is increased.
Description of the drawings:
FIG. 1 is a schematic view of a front view of an electric heating plate for reducing coating peeling according to the present invention;
FIG. 2 is a schematic view of a partial cross-sectional configuration of the embodiment of FIG. 1;
FIG. 3 is a schematic view of another embodiment of FIG. 1 in partial cross-sectional configuration;
FIG. 4 is a schematic view of the structure of an electric heating plate for reducing the peeling of the coating.
The specific implementation mode is as follows:
the process of the present invention is further illustrated in detail by reference to the following examples. It should be noted that the protection scope of the present invention should include, but not be limited to, the technical contents disclosed in the present embodiment.
The electric heating plate for reducing coating shedding comprises an aluminum substrate 1 for heating, wherein the aluminum substrate 1 can be made of die-cast aluminum or aluminum alloy, the thickness of the aluminum substrate can be 1-10mm, preferably 2-6mm, the cross section of the aluminum substrate can be rectangular or circular, the size of the aluminum substrate is not limited, the electric heating plate for reducing coating shedding of the aluminum substrate can be used for heating containers such as glass cups, steam heating appliances or cookers, and the electric heating plate for reducing coating shedding is usually fixedly arranged in a heating base A2 for use.
The aluminum substrate 1 is provided with the spiral groove 3 on the first surface 2 which is used for being attached to the heating container A1 to play a role in heat conduction, the first surface 2 is directly contacted with the bottom surface of the heating container, the first surface 2 and the spiral groove 3 can be formed by turning (the smoothness of the first surface 2 is higher than V5, and the smoothness of the spiral groove 3 is lower than V4), and the turning manufacturing cost is low; the first surface 2 may be a flat surface, a conical surface or a spherical surface, but is preferably a flat surface, so that the processing of the aluminum substrate 1 and the processing of the bottom surface of the heating container a1 are simple.
As shown in fig. 2 and 3, the depth of the spiral groove 3 (i.e. the height difference between the first surface 2 and the groove bottom) may be 0.05-0.3mm, the distance between the grooves (i.e. the center distance between adjacent grooves) may be 0.2-1.2mm, the width of the groove may be 0.1-0.6mm, the cross-sectional shape of the spiral groove 3 may be rectangular, trapezoidal, etc., and chamfers may be provided at both the groove opening and the groove bottom.
The depth of the spiral groove 3 can be 0.08-0.12mm, the groove distance is 0.4-0.8mm, the groove width is 0.15-0.4 mm, the optimum spiral groove 3 depth in the trial and error is 0.10mm, the groove distance is 0.6mm, and the groove width is 0.35 mm.
The first surface of the aluminum substrate is covered with the heat-conducting coating 4, the covering of the heat-conducting coating 4 on the first surface of the aluminum substrate does not only mean that the heat-conducting coating 4 on the first surface has paint, but includes paint with the heat-conducting coating 4 in the area covered by the first surface, the paint 5 of the heat-conducting coating also includes a part embedded in the spiral groove 3 and a part higher than the first surface 2 of the aluminum substrate, and the paint embedded in the spiral groove and the paint on the first surface of the aluminum substrate are continuous or discontinuous; the embodiments have the characteristics of good heat conduction efficiency and difficult shedding of the coating.
As for all the coating of the heat-conducting coating embedded in the spiral groove, as shown in FIG. 3, the surface of the coating embedded in the spiral groove is lower than the first surface (lower by 5-50 um) of the aluminum substrate, and the coating embedded in the spiral groove has larger contact area with the aluminum substrate, so that the connection firmness of the coating is greatly improved, and the falling of the coating is greatly reduced.
For the embodiment that the surface 6 of the heat-conducting coating is partially higher than the first surface 2 of the aluminum substrate and part of the coating is embedded in the spiral groove, as shown in fig. 2, the coating higher than the first surface 2 of the aluminum substrate is embedded in the spiral groove, and most of the coatings are continuous due to one-time spraying or printing, so that the connection firmness of the part of the coating is higher, and the coating is not easy to fall off.
The paint embedded in the spiral groove and the paint on the first surface of the aluminum substrate are continuous when being coated, but some paint inevitably generates material shrinkage, so that discontinuity can be generated; during manufacturing, the first surface of the aluminum substrate is coated with the heat-conducting coating, and the two embodiments shown in fig. 2 and 3 are generated due to the coating amount, but both embodiments can achieve the advantage of reducing the falling of the coating, and the embodiment shown in fig. 3 can be used for scraping the first surface 2 once by using a scraper before the embodiment shown in fig. 2 is dried, so that the coating higher than the first surface 2 can be pushed into the groove, and then the drying is performed.
The heat-conducting coating 4 can be coated and printed on the first surface of the aluminum substrate by adopting a screen printing process, the shapes of the screen-printed coatings can be various, and preferably, the screen-printed coatings are in a net shape, a grid shape, a circular shape or a circular ring shape; the heat-conducting coating 4 can also be directly brushed on the first surface of the aluminum substrate by adopting a brush, or can be coated on the first surface of the aluminum substrate by spraying and the like; the heat conduction coating 4 can occupy 30-100% of the area of the first surface 2 of the aluminum substrate; the thickness of the heat-conducting coating can be 0.05-0.3mm, and the heat-conducting coating needs to be baked to realize the shaping of the coating after screen printing or spraying.
The material of the heat-conducting coating can be any existing coating capable of conducting heat, the heat-conducting coating can be a coating with heat-conducting metal powder and graphene, the heat-conducting metal powder can be copper powder or aluminum powder, and the like, the formula of the heat-conducting coating also contains high-temperature ink, and the mass ratio of the heat-conducting metal powder or the graphene to the high-temperature ink is 15-30%, but the heat-conducting coating is not limited to this. The lubricating principle of graphene in the coating is not completely the same as the action mode of a common anti-wear additive, namely the molecular particles of the graphene are very small, strong intermolecular action force is possessed between graphene sheet layers, and the friction coefficient is greatly reduced, so that the addition of the graphene in the coating not only increases the heat conduction effect, but also obviously improves the anti-wear and lubricating effects of the coating.
The flatness tolerance between the surface of the heat-conducting coating and the first surface of the aluminum substrate is less than 0.10mm, and the preferable flatness tolerance is less than 0.05mm, and it is ensured that the flatness tolerance between the surface of the heat-conducting coating and the first surface of the aluminum substrate is less than 0.10mm, and it is easy to ensure that the flatness tolerance between the surface of the heat-conducting coating and the first surface of the aluminum substrate is less than 0.10mm (or 0.05 mm) when the first surface of the aluminum substrate is turned (before the groove spiral groove 3 is turned), because the flatness tolerance between the surface of the heat-conducting coating and the first surface of the aluminum substrate is less than 0.05mm, the bottom surface of the heating container is also processed and ensured to be less than 0.05mm, so that the contact area between the first surface of the aluminum substrate, the surface of the heat-conducting coating and the bottom surface of the heating container is large, and the improvement and the guarantee of the heating efficiency are facilitated.
For how to connect the electric heating tube 7 to the second surface of the aluminum substrate (i.e. the surface opposite to the first surface 2), the electric heating tube 7 arranged spirally can be directly fixed on the second surface of the aluminum substrate; or, a spiral channel (not shown in the figure) may be arranged on the second surface of the aluminum substrate, and the electric heating tube 7 is embedded in the channel, so that the second scheme is adopted to make the contact surface between the electric heating tube 7 and the aluminum substrate larger, and the heating efficiency is higher.
The center of the bottom surface of the glass heating container is usually concave upwards, and the center position of the bottom surface of the glass heating container is not contacted with the aluminum substrate, so that the center part of the first surface of the aluminum substrate is provided with a circle with the diameter of 10-35mm, and the heat-conducting coating is not covered on the circle, so that the heat-conducting coating is not needed at the center position, and the coating of the heat-conducting coating is saved.
The spiral groove 3 is turned on the first surface 2 of the aluminum substrate, and of course, other processing equipment or processing technology can be used to process the concentric circular groove, the spiral groove is identical to the concentric circular groove in the field of mechanical manufacturing, and only the spiral groove 3 is convenient and simple to process, so the spiral groove can be replaced by the identical concentric circular groove, the depth of the groove is 0.05-0.3mm, the distance between the grooves is 0.2-1.2mm, and the width of the groove is 0.1-0.6mm, and other embodiments are also suitable for the concentric circular groove.
The electric heating plate needs to meet the following tests: 1300ml of water with the temperature of 20 ℃ is filled in the glass, the glass is placed on a heating base with an electric heating plate to be electrified for working, when the water is boiled, the power supply is cut off, the glass is immediately and naturally placed on the heating base, the glass is circularly rotated for 45 degrees leftwards and rightwards for 1 time in 2 seconds, and after 100 times of circulation, the bottom coating of the glass and the coating of the heating plate are observed not to fall off.
The electric heating plate for reducing the falling of the coating has the advantages that: firstly, the processing technology for processing the spiral groove on the first surface of the aluminum substrate and covering the heat-conducting coating is simple, and the manufacturing cost is low; because part or all of the coating of the heat-conducting coating is embedded in the spiral groove, the contact area between the coating embedded in the spiral groove and the surface of the aluminum substrate is greatly increased, and the coating firmness of the coating is obviously improved; and part of the coating which is not embedded in the spiral groove is embedded in the spiral groove, so that the coating firmness of the coating which is not embedded in the spiral groove is increased.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (10)
1. The utility model provides a reduce electrical heating dish that coating drops which characterized in that: the aluminum substrate comprises an aluminum substrate for heating, wherein a spiral groove is formed in a first surface, which is used for being attached to a heating container and has a heat conduction effect, of the aluminum substrate, the depth of the spiral groove is 0.05-0.3mm, the groove distance is 0.2-1.2mm, the groove width is 0.1-0.6mm, a heat conduction coating is covered on the first surface of the aluminum substrate, part or all of coating of the heat conduction coating is embedded in the spiral groove, and the surface of the coating embedded in the spiral groove is lower than the first surface of the aluminum substrate.
2. An electrically heated heat generating plate with reduced coating peeling as defined in claim 1, wherein: the first surface flatness tolerance of the aluminum substrate is less than 0.10 mm.
3. An electrically heated heat generating plate with reduced coating peeling as defined in claim 1, wherein: the depth of the spiral groove is 0.10mm, the groove distance is 0.6mm, and the groove width is 0.35 mm.
4. An electrically heated heat generating plate with reduced coating peeling as claimed in claim 1, 2 or 3, wherein: the heat conducting coating is formed on the first surface of the aluminum substrate through screen printing or spraying.
5. An electrically heated heat generating plate with reduced coating peeling as claimed in claim 1 or 2, wherein: the spiral groove is replaced by a concentric circular groove, the depth of the groove is 0.05-0.3mm, the distance of the groove is 0.2-1.2mm, and the width of the groove is 0.1-0.6 mm.
6. An electrically heated heat generating plate with reduced coating peeling as claimed in claim 1, 2 or 3, wherein: the second surface of the aluminum substrate is provided with an electric heating pipe which is spirally arranged; or the second surface of the aluminum substrate is provided with a spiral channel, and an electric heating pipe is embedded in the channel.
7. An electrically heated heat generating plate with reduced coating peeling as claimed in claim 1, 2 or 3, wherein: the coating of the heat-conducting coating comprises a coating embedded in the spiral groove and positioned on the first surface of the aluminum substrate, and the coating embedded in the spiral groove and the coating positioned on the first surface of the aluminum substrate are continuous or discontinuous.
8. An electrically heated heat generating plate with reduced coating peeling as claimed in claim 1, 2 or 3, wherein: the spiral groove is formed by turning, and the heat-conducting coating is a coating with graphene and heat-conducting metal powder.
9. An electrically heated heat generating plate with reduced coating peeling as claimed in claim 1, 2 or 3, wherein: the central part of the first surface of the aluminum substrate is provided with a circle with the diameter of 10-35mm, the circle is not covered with a heat conduction coating, the shape of the heat conduction coating is in a circle shape, a circular ring shape or a net shape, and the heat conduction coating accounts for 30-100% of the area of the first surface of the aluminum substrate.
10. An electrically heated heat generating plate with reduced coating peeling as claimed in claim 1, 2 or 3, wherein: the aluminum substrate is 2-6mm thick and is rectangular or circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122254762.2U CN216357368U (en) | 2021-09-17 | 2021-09-17 | Electric heating plate capable of reducing coating falling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122254762.2U CN216357368U (en) | 2021-09-17 | 2021-09-17 | Electric heating plate capable of reducing coating falling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216357368U true CN216357368U (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122254762.2U Active CN216357368U (en) | 2021-09-17 | 2021-09-17 | Electric heating plate capable of reducing coating falling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216357368U (en) |
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2021
- 2021-09-17 CN CN202122254762.2U patent/CN216357368U/en active Active
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