CN115515265A - Instant heating type wire-wound thick film heating element - Google Patents

Instant heating type wire-wound thick film heating element Download PDF

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CN115515265A
CN115515265A CN202211298430.7A CN202211298430A CN115515265A CN 115515265 A CN115515265 A CN 115515265A CN 202211298430 A CN202211298430 A CN 202211298430A CN 115515265 A CN115515265 A CN 115515265A
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parts
thick film
cobalt blue
wire
iron red
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余定益
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/40Heating elements having the shape of rods or tubes
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00Parts, details or accessories of cooking-vessels
    • A47J36/24Warming devices
    • A47J36/2483Warming devices with electrical heating means
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/02Details

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Abstract

The invention discloses an instant heating type wire-wound thick film heating element, which sequentially comprises a base material, an insulating medium layer, an electric heating wire and a covering protective layer; the insulating medium layer is coated on the base material, the heating wire is wound on the base material coated with the insulating medium layer, and the covering protection layer is coated on the heating wire. The instant heating type wire-wound thick film heating element has the advantages of high temperature resistance, super heat conductivity, high insulation, good waterproofness, good acid and alkali corrosion resistance, comprehensive protection and the like, has very high heating speed, and perfect water-electricity separation.

Description

Instant heating type wire-wound thick film heating element
Technical Field
The invention relates to the technical field of water household appliance heating, in particular to an instant heating type wire-wound thick film heating body.
Background
Along with the progress and development of society, the living standard of people is increasingly rich, so that the demands for various living electric appliances are also increasingly large, water household appliances (such as water dispensers, tea bar machines, water heaters, pipeline machines, electric heating water taps, small kitchen wares and the like) are indispensable parts of daily life of people, and the quality of life of people is improved.
With the improvement of living standard, the acceleration of rhythm and the enhancement of safety consciousness of people, people pay more and more attention to the quality and the safety performance of products (particularly water home appliances). In the development of water heating technology in the past decades, manufacturers use many different production heating methods, heating materials and production processes, and hope to improve the competitiveness of their products as much as possible. For example: common metal heating elements, quartz tube nanometer coating heating tubes, silicon nitride heating elements, printed circuit thick film heating elements and the like. But all have different defects, and the defects of the common metal heating body are 1) slow temperature rise and low heat efficiency; 2) The high-power heating element is directly discharged into water for heating, and is directly electrified for heating under the condition of no water-electricity separation, so that great electric shock risk is caused; 3) The surface of the heating element is easy to generate a large amount of scale, and the heating element is easy to be blocked and seriously burnt out due to long service time. The quartz tube nanometer coating heating tube has the defects that 1) the power of the heating tube with the same heating area is much smaller than that of other products, and if the heating tube is made to have high power, the structure is very complex and the volume is also very large; 2) The power is unstable, the power can continuously drop along with the rise of the temperature, the power can be obviously attenuated after the power is used for a certain time, and the power cannot be recovered; 3) The input end is printed with a conductive silver paste ring, and the conductive silver paste ring is clamped on the metal ring, so that the printed conductive silver paste ring is very easy to fall off due to the fact that the quartz tube is too smooth, the metal ring is not tight, and the place with poor contact can be easily ignited and is very unsafe when being electrified; 4) The quartz tube is a glass product, is very easy to break, and is not easy to transport and install by a single tube. The silicon nitride heating element has the disadvantages of 1) very high price; 2) The structure design is very complicated, the aluminum material with good heat conductivity is used as a base material, the shell is manufactured in a die-casting mode, and then finish machining is carried out to mount the silicon nitride heating element; 3) The whole volume is also large, and the weight is also heavy; 4) It cannot be used at high temperatures in excess of 400 degrees because the aluminum housing cannot withstand it. The printed circuit thick film heating element has the best heating performance in the heating field until now, has the advantages of fast temperature rise, high heat efficiency, water-electricity separation and the like, and then can not be popularized because the cost is high due to the application of noble metal in the paste, the production process requirement is very strict, in a high-temperature dry burning experiment, the printed resistance heating line can be burnt as long as the temperature is heated to more than 400 ℃, and if the temperature is heated to more than 600 ℃, the resistance heating line can be burnt, so that the heating element is directly damaged.
Because various heating elements on the market have the defects, an instant heating type wire-wound thick-film heating element with excellent overall performance and low cost is urgently needed to be researched.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an instant heating type wire-wound thick film heating element with excellent performance, safety, reliability and low cost, and the specific technical scheme is as follows:
an instant heating type wire-wound thick film heating element sequentially comprises a base material, an insulating medium layer, an electric heating wire and a covering protective layer;
the insulating medium layer is coated on the base material, the heating wire is wound on the base material coated with the insulating medium layer, and the covering protection layer is coated on the heating wire.
Preferably, the insulating medium is cobalt blue glaze, and the raw materials of the cobalt blue glaze comprise, by mass, 9-13 parts of anhydrous borax, 12-20 parts of sodium carbonate, 4-7 parts of calcite, 22-31 parts of potassium feldspar, 5-10 parts of kaolin, 20-40 parts of quartz, 0.1-0.9 part of titanium dioxide, 3-9 parts of zirconium silicate, 2-3 parts of strontium carbonate, 2-6 parts of barium carbonate, 1.5-3 parts of cobalt oxide, 0.8-2.2 parts of nickel oxide, 1-2 parts of zinc oxide, 0.5-2 parts of iron oxide and 0.1-1 part of manganese dioxide.
Preferably, the preparation method of the insulating medium layer comprises the following steps:
(1) Uniformly mixing the raw materials according to the proportion to obtain a cobalt blue glaze raw material;
(2) Adding the uniformly mixed cobalt blue glaze raw material into a high-temperature melting furnace at 1400-1500 ℃, melting the powdery raw material into liquid, allowing the liquid to flow into a cold water tank, performing water quenching to obtain cobalt blue glassy particles, and fishing out the particles to obtain cobalt blue frit;
(3) Drying the obtained cobalt blue frit, and grinding the cobalt blue frit into fine powder which can pass through 320-330 meshes to obtain cobalt blue glaze powder;
(4) Uniformly grinding cobalt blue glaze powder and varnish according to a certain proportion by a grinding machine to obtain cobalt blue factice;
(5) And (3) after starching the cobalt blue ointment, coating the ointment on a base material, drying the base material, and sintering the base material at a high temperature to obtain the insulating medium layer.
Preferably, in the step (4), 0.65-0.7 part of varnish is added into 1 part of cobalt blue glaze powder.
Preferably, the covering protection layer is an iron red glaze, and the iron red glaze comprises, by mass, 10-16 parts of anhydrous borax, 8-12 parts of sodium carbonate, 4-7 parts of dolomite, 18-26 parts of potassium feldspar, 4-8 parts of kaolin, 20-30 parts of quartz, 10-16 parts of titanium dioxide and 2-3 parts of strontium carbonate. 2 to 4 portions of barium carbonate, 0.1 to 1 portion of cobalt oxide, 1 to 2 portions of nickel oxide, 1 to 2 portions of zinc oxide and 10 to 19 portions of ferric oxide.
Preferably, the method for preparing the protective cover layer comprises the following steps:
(1) Uniformly mixing the raw materials according to the proportion to obtain iron red glaze raw material;
(2) Adding the uniformly mixed iron red glaze raw material into a high-temperature melting furnace at 1400-1500 ℃, melting the powdery raw material into liquid, allowing the liquid to flow into a cold water tank, performing water quenching to obtain iron red glassy particles, and fishing out the particles to obtain iron red frit;
(3) Drying the obtained iron red frit, and grinding the iron red frit into fine powder which can pass through 320-330 meshes to obtain iron red glaze powder;
(4) Grinding the iron red glaze powder and the varnish uniformly by a grinder according to a certain proportion to obtain iron red factice;
(5) And (3) after starching the iron red ointment, coating the ointment on the electric heating wire, wrapping the electric heating wire in the ointment, drying the ointment, and sintering the ointment at high temperature to obtain the covering protective layer.
Preferably, the proportion in the step (4) is that 0.65 to 0.7 part of varnish is added into 1 part of iron red glaze powder.
Preferably, the substrate layer is made of SUS430 ferrite stainless steel material.
Preferably, the heating wire is an iron-chromium-aluminum high-temperature resistant heating wire.
Preferably, the heating wire is wound on the base material coated with the insulating medium layer and fixed by a clamp.
From the above description, it can be seen that the present invention has the following advantages:
1. the instant heating type wire-wound thick film heating element has the excellent performances of high temperature resistance, super heat conduction, high insulation, good waterproofness, good acid and alkali corrosion resistance, comprehensive protection and the like, and various problems existing in the conventional heating element for a long time are fundamentally solved through the production process flow.
2. The product of the invention has very fast heating speed, takes a heating tube with the tube diameter of 22mm, the length of 130mm and the power of 2200 watts as an example, and the water temperature can be immediately increased to more than 100 ℃ within 2 to 3 seconds at the ambient temperature of 25 ℃. Meanwhile, the device has perfect water-electricity separation, and is safe and reliable.
3. The product of the invention has excellent high temperature resistance and dry burning resistance, can be used for a long time at the high temperature of 1000 ℃ and can bear the high temperature of 1400 ℃ for more than 10 seconds.
Drawings
FIG. 1 is a schematic cross-sectional view of a product of the present invention.
In the figure: 1: base material, 2: insulating medium layer, 3: heating wire, 4: and covering the protective layer.
Detailed Description
In order to explain the technical features of the present invention in detail, the following embodiments further illustrate the features of the present invention, but do not limit the claims of the present invention.
As shown in fig. 1, a preferred embodiment of the present invention provides an instant heating type wire-wound thick film heater, which sequentially comprises a substrate 1, an insulating medium layer 2, an electric heating wire 3, and a covering protection layer 4;
the insulating medium layer 2 is coated on the base material 1, the heating wire 3 is wound on the base material 1 coated with the insulating medium layer 2, and the covering protection layer 4 is coated on the heating wire 3.
The preparation method of the insulating medium layer 2 comprises the following steps:
(1) Uniformly mixing the following raw materials according to a ratio to obtain a cobalt blue glaze raw material;
the raw material ratio is as follows: 11.5 parts of anhydrous borax, 16 parts of sodium carbonate, 5.5 parts of calcite, 27 parts of potassium feldspar, 8 parts of kaolin, 30 parts of quartz, 0.5 part of titanium dioxide, 6 parts of zirconium silicate and 2.6 parts of strontium carbonate. 4 parts of barium carbonate, 2.3 parts of cobalt oxide, 1.5 parts of nickel oxide, 1.5 parts of zinc oxide, 1 part of ferric oxide and 0.5 part of manganese dioxide;
the requirements of the raw materials are as follows:
Figure BDA0003903643740000041
Figure BDA0003903643740000051
the fineness of the raw materials is required to be more than 80 meshes.
(2) Adding the uniformly mixed cobalt blue glaze raw material into a high-temperature melting furnace at 1400-1500 ℃, melting the powdery raw material into liquid, allowing the liquid to flow into a cold water tank, performing water quenching to obtain cobalt blue glassy particles, and fishing out the particles to obtain cobalt blue frit;
(3) Drying the obtained cobalt blue frit, and grinding the cobalt blue frit into fine powder which can pass through 320-330 meshes to obtain cobalt blue glaze powder;
(4) Uniformly grinding cobalt blue glaze powder and ink regulating oil according to a certain proportion by a grinding machine to obtain cobalt blue ointment;
(5) And (3) after starching the cobalt blue ointment, coating the ointment on a base material, drying the base material, and sintering the base material at a high temperature to obtain the insulating medium layer 2.
The preparation method of the covering protective layer 4 comprises the following steps:
(1) Uniformly mixing the following raw materials according to a ratio to obtain an iron red glaze raw material;
the raw material ratio is as follows: 13 parts of anhydrous borax, 10 parts of sodium carbonate, 5.5 parts of dolomite, 22 parts of potassium feldspar, 6 parts of kaolin, 25 parts of quartz, 13 parts of titanium dioxide and 2.6 parts of strontium carbonate. 3 parts of barium carbonate, 0.5 part of cobalt oxide, 1.5 parts of nickel oxide, 1.5 parts of zinc oxide and 14 parts of ferric oxide;
the requirements for the raw materials are as follows:
Figure BDA0003903643740000052
Figure BDA0003903643740000061
the fineness of the raw materials is required to be more than 80 meshes
(2) Adding the uniformly mixed iron red glaze raw material into a high-temperature melting furnace at 1400-1500 ℃, melting the powdery raw material into liquid, allowing the liquid to flow into a cold water tank, performing water quenching to obtain iron red glassy particles, and fishing out the particles to obtain iron red frit;
(3) Drying the obtained iron red frit, and grinding the iron red frit into fine powder which can pass through 320-330 meshes to obtain iron red glaze powder;
(4) Grinding the iron red glaze powder and the varnish uniformly by a grinder according to a certain proportion to obtain iron red ointment;
(5) Standing iron red ointment, coating on electric heating wire, wrapping electric heating wire, oven drying, and sintering at high temperature to obtain protective cover
The implementation obtains the parameters of the instant heating type wire-wound thick film heating element:
voltage: AC220V; frequency: 50/60Hz; power: 2200W;
inner hole: 19mm; outer diameter: 22mm; length: 130mm; length of the heating area: 93mm;
the thickness of the insulating medium layer is 0.3mm; the thickness of the covering protective layer is 0.5mm.
1. High temperature resistance test
(1) Test method
The heating body is placed on a workbench in an upright way, is connected with a KSD301 kick type temperature controller, the temperature measuring point is 1.5mm away from the surface of a heating area, and is connected with AC220V voltage for testing
(2) Test results
Serial number Temperature (. Degree. C.) Time of temperature rise (S) Working time
1 100 1.25 Can work for a long time
2 200 2.30 Can work for a long time
3 300 3.32 Can work for a long time
4 400 4.18 Can work for a long time
5 500 5.03 Can work for a long time
6 600 5.88 Can work for a long time
7 700 6.60 Can work for a long time
8 800 7.38 Can work for a long time
9 900 8.00 Can work for a long time
10 1000 8.62 Can work for a long time
11 1100 9.15 Can work for more than 30min
12 1400 12.56 Can work for more than 30S
2. Water resistance test
(1) Test method
The whole heating body is put into water, placed for a certain time, taken out and directly subjected to an electrifying test, and any adverse reaction of the heating body in the electrifying process is visually observed.
(2) Test results
Figure BDA0003903643740000071
Figure BDA0003903643740000081
Description of the drawings: the thickness of the protective layer covering the surface of the heating element tested above was 0.5mm, and the thicker the thickness of the coating layer was, the better the water resistance was.
3. Acid and alkali resistance test
(1) Test method
The whole heating body is respectively put into alkaline liquid and acidic liquid with a certain proportion, is taken out after a certain time of placement and is directly subjected to a power-on test, and any adverse reaction of the heating body in the power-on process is visually observed.
(2) Test results
Figure BDA0003903643740000082
4. Insulation performance test
(1) Test method
The heating body is vertically fixed on a workbench, and is connected with a high-voltage tester, the voltage of the high-voltage tester is gradually adjusted upwards from small to large, the test is carried out, and the high-voltage bearing capacity of the heating body is observed.
High voltage tester parameters:
the model is as follows: merrelix RK2674A; output voltage: AC/DC, 0-20 KV;
testing current: AC, 0-20 mA; DC, 0-10 mA
Capacity of the transformer: 400VA
(2) Test results
Figure BDA0003903643740000091
According to the test results, the instant heating type wire-wound thick film heating element has the following advantages:
1. the instant heating type wire-wound thick film heating element has the excellent performances of high temperature resistance, super heat conductivity, high insulation, good waterproofness, good acid and alkali corrosion resistance, comprehensive protection and the like, and various problems existing in the past heating elements for a long time are fundamentally solved through the production process flow of the instant heating type wire-wound thick film heating element.
2. The product has the advantages of very high temperature rise speed, perfect water-electricity separation, safety and reliability.
3. The product of the invention has excellent high temperature resistance and dry burning resistance, can be used for a long time at the high temperature of 1000 ℃ and can bear the high temperature of 1400 ℃ for more than 10 seconds.
It should be understood that the detailed description of the invention is only for illustrating the invention and is not limited to the technical solutions described in the embodiments of the invention. It will be understood by those skilled in the art that the present invention may be modified and equivalents substituted for elements thereof to achieve the same technical result; and are within the scope of the present invention as long as the requirements of use are met.

Claims (10)

1. An instant heating type wire-wound thick film heating element is characterized by sequentially comprising a base material, an insulating medium layer, an electric heating wire and a covering protective layer;
the insulating medium layer is coated on the base material, the heating wire is wound on the base material coated with the insulating medium layer, and the covering protection layer is coated on the heating wire.
2. The instant heating type wire-wound thick film heating element according to claim 1, characterized in that the insulating medium is cobalt blue glaze, and the raw materials of the cobalt blue glaze comprise, by mass, 9-13 parts of anhydrous borax, 12-20 parts of sodium carbonate, 4-7 parts of calcite, 22-31 parts of potassium feldspar, 5-10 parts of kaolin, 20-40 parts of quartz, 0.1-0.9 part of titanium dioxide, 3-9 parts of zirconium silicate, 2-3 parts of strontium carbonate, 2-6 parts of barium carbonate, 1.5-3 parts of cobalt oxide, 0.8-2.2 parts of nickel oxide, 1-2 parts of zinc oxide, 0.5-2 parts of iron oxide, and 0.1-1 part of manganese dioxide.
3. The instant heating type wire-wound thick film heater of claim 2, characterized in that said insulating dielectric layer preparation method comprises the steps of:
(1) Uniformly mixing the raw materials according to the proportion to obtain a cobalt blue glaze raw material;
(2) Adding the uniformly mixed cobalt blue glaze raw material into a high-temperature melting furnace at 1400-1500 ℃, melting the powdery raw material into liquid, allowing the liquid to flow into a cold water tank, performing water quenching to obtain cobalt blue glassy particles, and fishing out the particles to obtain cobalt blue frit;
(3) Drying the obtained cobalt blue frit, and grinding the cobalt blue frit into fine powder which can pass through 320-330 meshes to obtain cobalt blue glaze powder;
(4) Uniformly grinding cobalt blue glaze powder and ink regulating oil according to a certain proportion by a grinding machine to obtain cobalt blue ointment;
(5) And (3) after starching the cobalt blue ointment, coating the ointment on a base material, drying the base material, and sintering the base material at a high temperature to obtain the insulating medium layer.
4. The instant heating type wire-wound thick film heating element according to claim 1, characterized in that the covering protective layer is an iron red glaze, and the iron red glaze raw materials comprise, by mass, 10-16 parts of anhydrous borax, 8-12 parts of sodium carbonate, 4-7 parts of dolomite, 18-26 parts of potassium feldspar, 4-8 parts of kaolin, 20-30 parts of quartz, 10-16 parts of titanium dioxide, and 2-3 parts of strontium carbonate. 2 to 4 portions of barium carbonate, 0.1 to 1 portion of cobalt oxide, 1 to 2 portions of nickel oxide, 1 to 2 portions of zinc oxide and 10 to 19 portions of ferric oxide.
5. The instant heating type wire-wound thick film heater of claim 4, characterized in that said protective cover layer preparation method comprises the steps of:
(1) Uniformly mixing the raw materials according to the proportion to obtain an iron red glaze raw material;
(2) Adding the uniformly mixed iron red glaze raw material into a high-temperature melting furnace at 1400-1500 ℃, melting the powdery raw material into liquid, allowing the liquid to flow into a cold water tank, performing water quenching to obtain iron red glassy particles, and fishing out the particles to obtain iron red frit;
(3) Drying the obtained iron red frit, and grinding the iron red frit into fine powder which can pass through 320-330 meshes to obtain iron red glaze powder;
(4) Grinding the iron red glaze powder and the varnish uniformly by a grinder according to a certain proportion to obtain iron red factice;
(5) And (3) after starching the iron red ointment, coating the ointment on the electric heating wire, wrapping the electric heating wire in the ointment, drying the ointment, and sintering the ointment at high temperature to obtain the covering protective layer.
6. The instant heating type wire-wound thick film heater of claim 1, wherein said substrate layer is made of SUS430 ferritic stainless steel.
7. The instant heating type wire-wound thick film heater according to claim 1, characterized in that said heating wire is an iron chromium aluminum ultra high temperature resistant heating wire.
8. The instant heating type wire-wound thick film heating element according to claim 3, wherein said proportion in step (4) is that 0.65-0.7 parts of varnish is added to 1 part of cobalt blue glaze powder.
9. The instant heating type wire-wound thick film heating element according to claim 5, wherein in step (4) said proportion is that 0.65-0.7 parts of varnish is added to 1 part of iron red glaze powder.
10. The instant heating type wire-wound thick film heater of claim 1, characterized in that said heating wire is wound on the substrate coated with said insulating medium layer and fixed by a clip.
CN202211298430.7A 2022-10-23 2022-10-23 Instant heating type wire-wound thick film heating element Pending CN115515265A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101125764A (en) * 2007-08-31 2008-02-20 湖南泉湘陶瓷有限公司 Method of manufacturing placer gold glaze material
CN101616513A (en) * 2008-06-27 2009-12-30 清华大学 Line heat source
CN101636011A (en) * 2008-07-25 2010-01-27 清华大学 Hollow heat source
AT511813B1 (en) * 2012-04-12 2013-03-15 Peter Dr Spiesberger-Eichhorn Heating device for bottle or tube-like containers
CN109392202A (en) * 2017-08-04 2019-02-26 淄博环能海臣环保技术服务有限公司 A kind of heat delivery surface is electrically insulating material face scale inhibition electric heater

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101125764A (en) * 2007-08-31 2008-02-20 湖南泉湘陶瓷有限公司 Method of manufacturing placer gold glaze material
CN101616513A (en) * 2008-06-27 2009-12-30 清华大学 Line heat source
CN101636011A (en) * 2008-07-25 2010-01-27 清华大学 Hollow heat source
AT511813B1 (en) * 2012-04-12 2013-03-15 Peter Dr Spiesberger-Eichhorn Heating device for bottle or tube-like containers
CN109392202A (en) * 2017-08-04 2019-02-26 淄博环能海臣环保技术服务有限公司 A kind of heat delivery surface is electrically insulating material face scale inhibition electric heater

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