CN202501629U - Electric heater - Google Patents
Electric heater Download PDFInfo
- Publication number
- CN202501629U CN202501629U CN201220114122XU CN201220114122U CN202501629U CN 202501629 U CN202501629 U CN 202501629U CN 201220114122X U CN201220114122X U CN 201220114122XU CN 201220114122 U CN201220114122 U CN 201220114122U CN 202501629 U CN202501629 U CN 202501629U
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- insulating barrier
- heat
- liquid
- electric
- conductive insulating
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Abstract
The utility model relates to an electric heater which comprises an electric heating plate and a liquid flow plate, wherein the liquid flow plate is fixed on the electric heating plate, and the electric heating plate comprises a metal baseplate; a first bottom surface of the metal baseplate is provided with a first insulating layer, and the first insulating layer is provided with an electric heating film; and the electric heating film is provided with a high-temperature-resistant heat conduction insulating layer used for directly heating liquid, and the liquid flow plate is arranged on the high-temperature-resistant heat conduction insulating layer. The electric heater provided by the utility model has the advantages that the thermal resistance is small, the heating speed is rapid, the thermoconductivity is high, the anti-scale and anti-corrosion functions are realized, no rustless spots occur, and the energy is saved.
Description
Technical field
The utility model relates to a kind of electric heater that is used for to the liquid heating.
Background technology
Existing a kind of electric boiling plate comprises metal substrate; Be provided with insulating barrier down in the precalculated position of a side bottom surface of said metal substrate; On said down insulating barrier, be printed with Electric radiant Heating Film,, on said Electric radiant Heating Film, also be provided with the thin dielectric layer of one deck in order to prevent Electric radiant Heating Film oxygen and decaying in air; So that Electric radiant Heating Film and air insulated, and make the temperature in the shed of heating film be in a proper state; Generally speaking, the material of said dielectric layer is identical with the material of said insulating barrier down.Consider electric boiling plate when heating liquid, the bigger situation of the rapid heat cycle temperature difference can occur, generally; Said dielectric layer and said insulating barrier are down selected the devitrified glass insulating barrier for use; In order to guarantee that metal substrate and said devitrified glass insulating barrier have the good binding performance, said metal substrate generally adopts corrosion resistant plate, and is wherein better with the Technological adaptability of 430 corrosion resistant plates; But its thermal conductivity factor is relatively poor in the metal, so thermal resistance is big.
When above-mentioned electric boiling plate uses at the electrical-heating source as electric heater; For the sake of security; Realizing that liquid thoroughly separates with electricity, generally is that the side bottom surface with the no Electric radiant Heating Film of metal substrate contacts with the flow of liquid guidance tape, and the heat of Electric radiant Heating Film generation at first is delivered to down insulating barrier; Be transmitted to metal substrate through following insulating barrier again, carry out heat exchange through metal substrate and liquid again; And why do not adopt dielectric layer directly directly to contact with the flow of liquid guidance tape; Through dielectric layer directly and liquid carry out heat exchange; Mainly be the technology condition that is subject to dielectric layer: if 1 dielectric layer is too thin; Utilize heat conduction in the heating film, can not make the Electric radiant Heating Film internal temperature too high and influence service life, but have the charged potential safety hazard of hot liquid; 2, too thick like dielectric layer; Help dielectric strength and strengthen, but the heat conduction is obstructed make the film temperature rise and influences service life, simultaneously; If the suddenly cold and hot that medium is too thick to be produced when bearing thermal shock changes, just might crackle occur and cause electric leakage hidden danger.Therefore, there is the problem of the following aspects in the electric heater of making as electrical-heating source with this electric boiling plate at present, and the one, pyroconductivity is not high; Firing rate is slow, and owing to the multilayer conduction of insulating barrier and stainless steel 430 metal substrates under the heat warp of Electric radiant Heating Film generation, thermal resistance is bigger; Through test, when fluid temperature is heated to 50 ℃, when heating power is big (3-8KW); The temperature of the dielectric layer of its Electric radiant Heating Film is generally between 150 ℃-210 ℃; Make between medium upper epidermis temperature and the room temperature temperature difference bigger, heat is wasted, and make firing rate slack-off; The 2nd, higher when the hardness of liquid, in heating process, heated metal substrate is inboard to be contacted with the liquid of high rigidity for a long time; Easy surface scale at metal substrate; Produce bigger thermal resistance, further reduce heat utilization efficiency, when serious; The liquid road is stopped up in the fouling meeting, and makes the whole electric heater can't operate as normal; The 3rd, if metal substrate adopts 430 corrosion resistant plates under long-term heating condition, can produce electrochemical corrosion with part ion in the liquid, produce formae oxydatae and influence liquid quality.
The utility model content
In order to overcome the problem that exists in the above-mentioned prior art, the purpose of the utility model provide can be directly with the Electric radiant Heating Film one side is little as the thermal resistance of heating surface, pyroconductivity is high, and is with low cost, and the electric heater of energy-saving anti-corrosive antiscale.
The technical scheme of the utility model is: a kind of electric heater is provided; Comprise electric boiling plate and flow of liquid guidance tape, said flow of liquid guidance tape is fixed on the said electric boiling plate, and said electric boiling plate comprises metal substrate; On first bottom surface of said metal substrate, be provided with first insulating barrier; On said first insulating barrier, be provided with Electric radiant Heating Film, on said Electric radiant Heating Film, be provided with the thermostable heat-conductive insulating barrier that directly is used for to the liquid heating, said flow of liquid guidance tape is arranged on the said thermostable heat-conductive insulating barrier.
As improvement to the utility model; On second bottom surface of said metal substrate, be provided with first insulating barrier; On said first insulating barrier, be provided with Electric radiant Heating Film; On said Electric radiant Heating Film, be provided with the thermostable heat-conductive insulating barrier that directly is used for to the liquid heating, said flow of liquid guidance tape is arranged on the said thermostable heat-conductive insulating barrier.
As the improvement to the utility model, said thermostable heat-conductive insulating barrier is solid-state thermostable heat-conductive insulating barrier or liquid thermostable heat-conductive insulating barrier.
As the improvement to the utility model, said solid-state thermostable heat-conductive insulating barrier is an organic high temperature-resistant heat conductive insulating layer.
As the improvement to the utility model, said organic high temperature-resistant heat conductive insulating layer is processed with fire resistant resin, organic siliconresin or polytetrafluoroethylene (PTFE).
As improvement, in said organic high temperature-resistant heat conductive insulating layer, contain the heat filling powder of 1%-15% percentage by weight to the utility model.
As the improvement to the utility model, said heat filling powder is titanium carbide conductive powder or nitrogen boron compound conductive powder.
As improvement, in said heat filling powder, also contain carborundum powder to the utility model.
As improvement to the utility model, said heat filling powder be the titanium carbide conductive powder with the nitrogen boron compound conductive powder in the mixing heat filling powder of two or more different conductive powder.
As improvement, in said mixing heat filling powder, also contain carborundum powder to the utility model.
As the improvement to the utility model, said mixing heat filling powder is made up of following component:
Titanium carbide conductive powder 1-5 weight portion;
Nitrogen boron compound conductive powder 1-8 weight portion and carborundum powder 2-10 weight portion.
As the improvement to the utility model, said solid-state thermostable heat-conductive insulating barrier is an inorganic high-temperature resistant heat conductive insulating layer.
As the improvement to the utility model, said solid-state inorganic high-temperature resistant heat conductive insulating layer is made up of following by weight percentage,
As improvement to the utility model, said liquid thermostable heat-conductive insulating barrier be by heat conductive insulating oil with wrap in the outer field heat-conducting metal shell of heat conductive insulating oil and constitute.
The utlity model has that the little firing rate of thermal resistance is fast, pyroconductivity is high, anti-scaling anti-corrosive do not have rust staining and occurs, and energy-saving advantages.In the utility model, the effect of silica is that the structure constituent element with silicon-oxy tetrahedron forms irregular connection network, constitutes the glass skeleton; The effect of diboron trioxide is to reduce the glass swelling coefficient, improves heat endurance, the mechanical performance of chemical stability and glass; Barytic effect is to increase chemical stability to quicken the speed of founding in calcium oxide, zinc oxide and the baryta mixture; Calcium oxide is a stabilizing agent; Increase chemical stability and mechanical strength; Zinc oxide can reduce the coefficient of expansion, and product structure is more stable, improves the chemical stability and the heat endurance of product; The effect of cobalt oxide, nickel oxide and manganese dioxide mixture is the adhesive ability of strengthening with metal material surface, makes dielectric layer more stable in thermal shock, does not ftracture and does not peel off; The effect of chrome green is to increase adhesive force and painted; The effect of aluminium nitride is high heat conduction inorganic material.
Description of drawings
Fig. 1 is the perspective view of a kind of embodiment of the utility model.
Fig. 2 is the planar structure sketch map of a kind of embodiment of the electric boiling plate among Fig. 1.
Fig. 3 is the A-A cross-sectional view of Fig. 2.
Fig. 4 is the cross-sectional view of the another kind of embodiment of the utility model electric boiling plate.
Fig. 5 is the cross-sectional view of second kind of embodiment of the utility model electric heater.
Fig. 6 is the cross-sectional view of the third embodiment of the utility model electric heater.
The specific embodiment
See also Fig. 1; Announcement shown in Figure 1 be a kind of electric heater; Comprise electric boiling plate 1 and flow of liquid guidance tape 16, respectively be provided with an electric boiling plate 1 in the both sides of said flow of liquid guidance tape 16, every electric boiling plate 1 is tightly connected with said flow of liquid guidance tape 16 through sealing ring 101 separately; Be provided with overheat protector switch 102 at the back side of every electric boiling plate 1; End at electric boiling plate 1 is provided with electrode leads to client 103, advances fluid port 161 and goes out the downside that fluid port 163 is located at flow of liquid guidance tape 16, advances fluid port 161 and goes out to be provided with controllable silicon 2 between the fluid port 163 said.Obviously, the utility model also can be designed to the structure of single face heating, i.e. a structure with an electric boiling plate 1.
See also Fig. 2 and Fig. 3, what Fig. 2 and Fig. 3 disclosed is a kind of electric boiling plate 1 among Fig. 1, comprises metal substrate 11; On first bottom surface 111 of said metal substrate 11, be provided with first insulating barrier 12, first bottom surface 111 in the utility model can be the upper bottom surface of metal substrate 11, also can be the bottom surface of metal substrate 11; On said first insulating barrier 12, be provided with Electric radiant Heating Film 13; Said Electric radiant Heating Film 13 preferred design become curve, are principle with the area that increases Electric radiant Heating Film 13 as much as possible, can improve the efficient of Electric radiant Heating Film 13; Make its quick life-span of generating heat long; On said Electric radiant Heating Film 13, be provided with thermostable heat-conductive insulating barrier 14,, can on said Electric radiant Heating Film 13, cover first insulating layer 15 in order further to strengthen the insulating properties of the utility model.First insulating barrier 12 in the utility model is devitrified glass insulating barriers.Said second insulating barrier 15 also can adopt the devitrified glass insulating barrier.Electric radiant Heating Film 13 in the utility model is formulated with the thermo electric material that contains rare earth, is printed on first insulating barrier through the silk-screen mode, then, forms through high temperature sintering again.Said metal substrate 11 preferably adopts corrosion resistant plate, wherein considers the interlock performance of devitrified glass insulating barrier and corrosion resistant plate, preferably selects 430 corrosion resistant plates for use.
In the utility model, said thermostable heat-conductive insulating barrier 14 can be to select a kind of in fire resistant resin, organic siliconresin or the polytetrafluoroethylene (PTFE) for use.Fire resistant resin in the utility model can be selected the kind of the relevant model of the fire resistant resin that oasis, Jinan, Shandong composite Co., Ltd produces for use; It is the self-cross linking type fluorine silicon resin of 1-5 μ m that organic siliconresin can be selected particle diameter for use, and the farsighted new material Science and Technology Ltd. of closing in Guangzhou produces.
In order further to improve the utility model heat conductivility, in said high temperature resistant organic insulating film, contain the heat filling powder of 1%-15% percentage by weight.That is to say that if the employing of high temperature resistant organic insulating film is fire resistant resin, heat filling grain weight amount percentage is 1%-15% so, the fire resistant resin percentage by weight then is 85%-99%.Other high temperature resistant organic insulating film such as organic silicones or polytetrafluoroethylene (PTFE) and heat filling powder proportioning and above-mentioned similar.
In the utility model, said heat filling powder can be titanium carbide conductive powder or nitrogen boron compound conductive powder.Also can adopt the mixing heat filling powder of titanium carbide conductive powder and nitrogen boron compound conductive powder, or the mixing heat filling powder of titanium carbide conductive powder and nitrogen boron compound, perhaps the mixing heat filling powder of titanium carbide conductive powder and nitrogen boron compound conductive powder.
When adopting the mixing heat filling powder of titanium carbide conductive powder and nitrogen boron compound, the ratio of its former with the latter preferably adopts the 1:1-5 weight portion; When adopting the mixing heat filling powder of titanium carbide conductive powder and nitrogen boron compound conductive powder, preferably adopt the ratio of nitrogen boron compound conductive powder 1-8 weight portion and carborundum powder 2-10 weight portion.
In the utility model, in said titanium carbide conductive powder or nitrogen boron compound conductive powder, can also contain carborundum powder, after preventing that the heat filling powder from adding in the high temperature resistant organic insulating film 14, make in the high temperature resistant organic insulating film 14 to crack.Same reason also contains carborundum powder in said mixing heat filling powder.Said titanium carbide conductive powder or nitrogen boron compound conductive powder and said carborundum powder ratio can adopt the 3-5:1 weight portion.
In the utility model, said thermostable heat-conductive insulating barrier can also be an inorganic high-temperature resistant heat conductive insulating layer.Said solid-state inorganic high-temperature resistant heat conductive insulating layer is made up of following by weight percentage,
Wherein, the calcium oxide in calcium oxide, zinc oxide and the baryta mixture, zinc oxide and barytic percentage by weight are 30:45:25; The percentage by weight of cobalt oxide, nickel oxide and manganese dioxide in cobalt oxide, nickel oxide and the manganese dioxide mixture is 10:70:20.
During use, flow of liquid guidance tape 16 (referring to Fig. 5) can be set on thermostable heat-conductive insulating barrier 14, liquid gets into from advancing fluid port 161; In liquid road 162, being heated the back flows out from going out fluid port 163; Because the heat that Electric radiant Heating Film 13 produces only passes through thermostable heat-conductive insulating barrier 14 perhaps through behind second insulating barrier 15 and the high temperature resistant organic insulating film 14, with the heat exchange of carrying out in the liquid road 162, through test; When fluid temperature is heated to 50 degrees centigrade; When heating power was 3-8KW, its metal substrate 11 surface temperatures had only 60 degrees centigrade, reduced above 100 degrees centigrade than metallic surface temperature of the prior art; Therefore, the utility model can improve heat utilization efficiency 10%-20%.
See also Fig. 4, Fig. 4 is the cross-sectional view of the another kind of embodiment of the utility model electric boiling plate.Embodiment illustrated in fig. 4ly compare with the said embodiment of Fig. 3; Its general structure is identical; Different is on second bottom surface 112 of metal substrate 11, to be provided with the second high temperature resistant organic insulating film 141, like this, if when second bottom surface 112 of metal substrate 11 used as heating surface; Also can improve the anti-corrosive properties of metal substrate 11, and exempt to make the iron rust liquid of generation to get into to be heated in the liquid and contaminated liquid physique.
See also Fig. 5, Fig. 5 is the cross-sectional view of the two-sided heating of a kind of monobasal of the utility model electric heater.Can know from figure; In the utility model, not only first bottom surface 111 of metal substrate 11 is provided with thermostable heat-conductive insulating barrier 14, and on second bottom surface 112, also is provided with thermostable heat-conductive insulating barrier 14; A flow of liquid guidance tape 16 respectively is set on thermostable heat-conductive insulating barrier 14 respectively; Liquid gets into from advancing fluid port 161, flows out from going out fluid port 163 after in liquid road 162, being heated, because the heat that Electric radiant Heating Film 13 produces is only through the heat exchange of carrying out in thermostable heat-conductive insulating barrier 14 and the liquid road 162; Through test, the utility model can improve heat utilization efficiency 20%-25%.Can reach like this with a sheetmetal substrate 11, can realize two-sided heating, its heat utilization efficiency is higher, and volume is also littler, and cost is also lower.
See also Fig. 6, enforcement embodiment illustrated in fig. 6 and shown in Figure 3 is basic identical, different is said liquid thermostable heat-conductive insulating barrier is by heat conductive insulating oil 20 with wrap in heat conductive insulating oil 20 outer field heat-conducting metal shells 21 and constitute.During use, flow of liquid guidance tape 16 can be set on heat-conducting metal shell 21.
Claims (5)
1. electric heater; Comprise electric boiling plate (1) and flow of liquid guidance tape (16); Said flow of liquid guidance tape (16) is fixed on the said electric boiling plate (1); It is characterized in that: said electric boiling plate (1) comprises metal substrate (11), on first bottom surface (111) of said metal substrate (11), is provided with first insulating barrier (12), on said first insulating barrier, is provided with Electric radiant Heating Film (13); On said Electric radiant Heating Film (13), be provided with the thermostable heat-conductive insulating barrier (14) that directly is used for to the liquid heating, said flow of liquid guidance tape (16) is arranged on the said thermostable heat-conductive insulating barrier (14).
2. electric heater according to claim 1; It is characterized in that: on second bottom surface (112) of said metal substrate (11), be provided with first insulating barrier (12); On said first insulating barrier, be provided with Electric radiant Heating Film (13); On said Electric radiant Heating Film (13), be provided with the thermostable heat-conductive insulating barrier (14) that directly is used for to the liquid heating, said flow of liquid guidance tape (16) is arranged on the said thermostable heat-conductive insulating barrier (14).
3. electric heater according to claim 1 and 2 is characterized in that: said thermostable heat-conductive insulating barrier (14) is solid-state thermostable heat-conductive insulating barrier or liquid thermostable heat-conductive insulating barrier.
4. electric heater according to claim 3 is characterized in that: said organic high temperature-resistant heat conductive insulating layer is processed with fire resistant resin, organic siliconresin or polytetrafluoroethylene (PTFE).
5. electric heater according to claim 1 and 2 is characterized in that: said liquid thermostable heat-conductive insulating barrier be by heat conductive insulating oil with wrap in the outer field heat-conducting metal shell of heat conductive insulating oil and constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220114122XU CN202501629U (en) | 2012-03-25 | 2012-03-25 | Electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220114122XU CN202501629U (en) | 2012-03-25 | 2012-03-25 | Electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202501629U true CN202501629U (en) | 2012-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220114122XU Expired - Fee Related CN202501629U (en) | 2012-03-25 | 2012-03-25 | Electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202501629U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607178A (en) * | 2012-03-25 | 2012-07-25 | 唐向平 | Electric heater |
-
2012
- 2012-03-25 CN CN201220114122XU patent/CN202501629U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607178A (en) * | 2012-03-25 | 2012-07-25 | 唐向平 | Electric heater |
| CN102607178B (en) * | 2012-03-25 | 2014-01-08 | 唐向平 | Electric heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20150325 |
|
| EXPY | Termination of patent right or utility model |