CN201401860Y - Electric heater based on ceramic heating assembly - Google Patents
Electric heater based on ceramic heating assembly Download PDFInfo
- Publication number
- CN201401860Y CN201401860Y CN2009200547291U CN200920054729U CN201401860Y CN 201401860 Y CN201401860 Y CN 201401860Y CN 2009200547291 U CN2009200547291 U CN 2009200547291U CN 200920054729 U CN200920054729 U CN 200920054729U CN 201401860 Y CN201401860 Y CN 201401860Y
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- Prior art keywords
- ceramic heating
- electric heater
- heating assembly
- heater based
- alumina
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Abstract
The utility model relates to an electric heater based on a ceramic heating assembly, comprising a base frame, a shell, the heating assembly, a control circuit, a lead wire and a power plug, wherein the heating assembly comprises at least one ceramic heating unit which is composed of an alumina ceramic heating element, insulating glue and radiating sheets, wherein the radiating sheets are bonded onthe upper surface and the lower surface of the alumina ceramic heating element through the insulating glue; and the alumina ceramic heating element comprises a bottom alumina layer, an upper aluminalayer, a conducting layer formed between the bottom alumina layer and the upper alumina layer, an electrode connecting the conducting layer and the lead wire. The surfaces of the radiating sheets areuncharged when the ceramic heating assembly adopted by the electric heater works, and the ceramic heating assembly is safe and reliable and has no obvious impact current during working; in addition, the initial heating rate of the electric heater is obviously higher than that of an electric heater adopting a PTC heating assembly under the same heating condition, and the unbalanced power of the electric heater is obviously saved more than that of the electric heater adopting the PTC heating assembly when the same heating effect is achieved.
Description
Technical field
The utility model relates to the daily-use electrical appliance field, is specifically related to electric heater.
Background technology
Electric heater is applicable to the indoor heating in room, hotel, restaurant, is made of pedestal, shell, heat generating component, control circuit, lead, attaching plug etc. usually.
As shown in Figure 1, the heat generating component of electric heater employing at present is with PTC (positive temperature coefficient, the abbreviation of PositiveTemperature Coefficient) heater element is a core, at the both sides of PTC heater element bonding two sheet metals of conductive viscose (as copper, aluminium, stainless steel substrates), and draw two leads as powered electrode by these two sheet metals, form a heat-generating units, a plurality of such heat-generating units compose in parallel heat generating component (being three heat-generating units among Fig. 1).Yet, dangerous based on heat generating component (being called for short the PTC heat generating component) whole heat generating component surface charging when electric heater is worked of PTC heater element, need put the insulation heat proof material again in the sheet metal outside, adopt extra insulating protection to handle; In addition, starting power non-linear rapid variation in 5～15 seconds that the PTC heat generating component is intrinsic, the dynamic adjustments process causes the heating rate of PTC heat generating component slow, and there is a very significantly dash current in control circuit, and the control circuit designing requirement is relatively harsher.
The utility model content
The utility model provides a kind of electric heater based on ceramic heating assembly, and purpose is to improve the heat generating component security, improves electric heater starting power characteristic, improves heating rate, reduces the dash current to control circuit.
Above-mentioned purpose is realized by following technical scheme:
A kind of electric heater based on ceramic heating assembly comprises pedestal, shell, heat generating component, control circuit, lead and attaching plug; Heat generating component comprises at least one group of ceramic heating unit, and described heat-generating units is formed by alumina ceramic heating element, insulating cement and by the fin that insulating cement is bonded in alumina ceramic heating element upper and lower surface.
Described alumina ceramic heating element comprises aluminium oxide bottom, aluminium oxide upper strata, is formed at the conductive layer between aluminium oxide bottom and the aluminium oxide upper strata, the electrode and the lead of connecting conductive layer.
Described aluminium oxide upper strata is provided with the indent closed pore, and the end of electrode and lead is arranged in this indent closed pore, and the indent closed pore adopts insulation silica gel to fill up.
The utility model than prior art beneficial effect be embodied in: the ceramic heating assembly that electric heater adopts fin surface when the work is not charged, and can pass through the 4500V/1s voltage-withstand test, and is safe and reliable; Simultaneously, the whole duration of work that starts to stabilized operating temperature from energising does not have tangible dash current, and resistance and temperature are the linear positive relation, and temperature and time, power and time are the linear approximate relationship that slowly changes; Under identical heating condition, initial heating rate is obviously fast than the electric heater that adopts the PTC heat generating component, and identical balanced power when adding thermal effect is obviously more energy-conservation than the electric heater that adopts the PTC heat generating component reaching.
Description of drawings
Fig. 1 is the discrete composition diagram of existing P TC heat generating component;
Fig. 2 is the discrete composition diagram of the ceramic heating assembly of the utility model employing;
Fig. 3 be in the ceramic heating assembly that adopts of the utility model ceramic heating element overlook exterior view;
Fig. 4 is that the A-A place is the profile at ceramic heating element electrode place among Fig. 3;
Fig. 5 is the resistance-temperature characteristics figure of ceramic heating element;
Fig. 6 is the resistance-temperature characteristics figure of existing PTC heater element;
Fig. 7 adopts the electric heater of ceramic heating assembly and the temperature-time response comparison diagram of the electric heater that adopts the PTC heat generating component;
Fig. 8 adopts the electric heater of ceramic heating assembly and the current-time characteristic comparison diagram of the electric heater that adopts the PTC heat generating component.
The specific embodiment
The electric heater that present embodiment provides comprises pedestal, shell, ceramic heating assembly, control circuit, lead and attaching plug etc., and wherein pedestal, shell, control circuit, lead and attaching plug belong to prior art, repeat no more herein.To innovative point of the present utility model, promptly ceramic heating assembly partly highlights below.
As shown in Figure 2, ceramic heating assembly comprises at least one group of ceramic heating unit (among the figure being three groups), and every group of heat-generating units is by alumina ceramic heating element 2-1, insulating cement 2-2 and fin 1-1 is bonding forms.Alumina ceramic heating element 2-1 upper and lower surface is respectively by the bonding fin 1-1 of insulating cement, and fin 1-1 adopts the aluminum or aluminum alloy material, and insulating cement adopts the insulating cement of anti-500 ℃ of high temperature.
As shown in Figure 3, alumina ceramic heating element 2-1 comprises alumina insulation matrix pottery 3-1, is arranged at the conductive layer (not shown) of alumina insulation matrix pottery 3-1 inside, the electrode 3-2 and the lead 3-3 of connecting conductive layer.As shown in Figure 4, in the present embodiment, alumina insulation matrix pottery 3-1 specifically comprises aluminium oxide bottom 3-6 and aluminium oxide upper strata 3-5, described conductive layer is formed between aluminium oxide bottom 3-6 and the aluminium oxide upper strata 3-5, narrow and small indent closed pore is set on the 3-5 of aluminium oxide upper strata, the long-pending ratio of whole alumina insulation matrix pottery 3-1 total surface that accounts for of this indent hole-closing surface is less than 5%, the end of electrode 3-2 and lead 3-3 is arranged in this indent closed pore, be used for the heater element electrode and draw, the indent closed pore adopts insulation silica gel to fill up.Lead is a nickel wire, and adopts the Teflon sebific duct to entangle and draw.Smooth and easy for conducting, on the conductive layer at indent closed pore place nickel coating 3-4 is set.
Above-mentioned ceramic heating element adopts the aluminium oxide ceramics of The tape casting preparation as alumina insulation matrix pottery, and aluminium oxide bottom 3-6, aluminium oxide upper strata 3-5 interlayer form the heating circuit by the metal paste of printed conductive layer.The multi-layer ceramic chip that laminates after the processing forms at the high temperature sintering that is higher than 1600 ℃ under the wet hydrogen reducing atmosphere that feeds certain proportion steam, the heating pottery afterwards that sintering forms externally has only two electrode eductions, and all the other surfaces more than 95% all are the good aluminium oxide ceramics of insulating properties.Pass through Nickel Plating Treatment then, and in the hydrogen atmosphere stove, weld nickel plain conductor formation electrode outlet line as scolder with good resistance to elevated temperatures and electric conductivity with the yellow gold alloy.
In conjunction with Fig. 2 and above-mentioned statement, every group of ceramic heating unit and whole ceramic heating assembly surface are not charged, add the good insulation performance of alumina substrate material, heat generating component can have been eliminated the potential potential safety hazard of surface charging fully by the voltage-withstand test of 4500V/1S.
Creep age distance among Fig. 4 (between two conductive components or the beeline that records along the insulant surface between conductive component and the utensil border) meets GB 4706.1-2005 " the safe part 1 of family expenses and similar applications electrical equipment: general requirement " and IEC 60335-1-2006 " Household and similar electricalappliances-Safety-Part 1:General requirements " family expenses and similar applications security appliance standard fully.
Handle by insulation silica gel and high temperature Furtulon sleeve pipe, both sides are sticky as a heat-generating units with the insulating cement and the aluminium radiator fin of 500 ℃ of high temperature of ability, structures such as that aluminium radiator fin can adopt is emanant, corrugated, fin type, heat generating component is coupled together by parallel connection or series system by so one or more heat-generating units and constitutes.
Further combined with experimental data, the beneficial effects of the utility model are described below:
Fig. 5 is that ceramic heating element normal temperature (25 ± 2 ℃) resistance that the utility model adopts is an experimental data of resistance-temperature curve of 110 Ω, the resistance of this heater element is along with the slow smooth change of temperature, this linear relationship that is changed to positive temperature coefficient, the resistance-temperature characteristics figure that obviously is different from existing PTC heater element shown in Figure 6, as shown in Figure 6, during the firm energising of existing PTC heater element, the resistance value of element descends with the rising of temperature, is negative temperature that is NTC characteristic; When temperature is elevated to certain limit, the PTC heater element will be positive temperature characterisitic, and the starting point of positive temperature characterisitic is so-called curie point.Linear positive relation just because of the resistance-temperature of ceramic heating element has determined electric heater of the present utility model not have dash current in essence.
Fig. 7 and Fig. 8 are the utility model electric heater of same size, model and the comparison of adopting PTC heat generating component electric heater, the contrast experiment of both electric currents of test and temperature characterisitic in equivalent environment.As shown in Figure 7, the utility model heating rate comparison than employing PTC heat generating component electric heater fast, the especially preceding 40 seconds efficiency of heating surface is more obvious.
Fig. 8 has provided the utility model electric heater and has adopted the current curve diagram of PTC heat generating component electric heater, as can be seen, adopts the electric heater of PTC heat generating component that a tangible dash current peak is arranged.In this experiment, because under the identical situation of other condition, on-load voltage is constant, loop current has just characterized the power consumption of electric heater.To the current curve integration, just can find out at a time between in the section, the utility model electric heater and adopt the power consumption situation of PTC heat generating component electric heater.Both current curves are got 0S → 600S integration, and the subordinate list among Fig. 8 has provided corresponding integral and calculating result.From integral area, the utility model electric heater is 2593.075, adopting the electric heater of PTC heat generating component is 3223.675, and the integral area based on the electric heater of ceramic heating assembly of comparing that the utility model provides has lacked 19.56% ((3223.675-2593.075)/3223.675).
Claims (7)
1. the electric heater based on ceramic heating assembly comprises pedestal, shell, heat generating component, control circuit, lead and attaching plug; It is characterized in that: heat generating component comprises at least one group of ceramic heating unit, and described heat-generating units is formed by alumina ceramic heating element, insulating cement and by the fin that insulating cement is bonded in alumina ceramic heating element upper and lower surface.
2. the electric heater based on ceramic heating assembly according to claim 1 is characterized in that: described alumina ceramic heating element comprises: aluminium oxide bottom, aluminium oxide upper strata, be formed at the conductive layer between aluminium oxide bottom and the aluminium oxide upper strata, the electrode and the lead of connecting conductive layer.
3. the electric heater based on ceramic heating assembly according to claim 2 is characterized in that: described aluminium oxide upper strata is provided with the indent closed pore, and the end of electrode and lead is arranged in this indent closed pore, and the indent closed pore adopts insulation silica gel to fill up.
4. the electric heater based on ceramic heating assembly according to claim 3 is characterized in that: described lead adopts the Teflon sebific duct to entangle and draws.
5. the electric heater based on ceramic heating assembly according to claim 3 is characterized in that: on the conductive layer at described indent closed pore place nickel coating is set.
6. the electric heater based on ceramic heating assembly according to claim 1 is characterized in that: described fin adopts a kind of or its combination in emanant, corrugated, the fin type.
7. the electric heater based on ceramic heating assembly according to claim 1 is characterized in that: described insulating cement is the insulating cement of anti-500 ℃ of high temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200547291U CN201401860Y (en) | 2009-04-16 | 2009-04-16 | Electric heater based on ceramic heating assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200547291U CN201401860Y (en) | 2009-04-16 | 2009-04-16 | Electric heater based on ceramic heating assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201401860Y true CN201401860Y (en) | 2010-02-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200547291U Expired - Lifetime CN201401860Y (en) | 2009-04-16 | 2009-04-16 | Electric heater based on ceramic heating assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201401860Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102668691A (en) * | 2010-03-30 | 2012-09-12 | 贝洱海拉温控***有限公司 | Electric heating system, in particular for a hybrid vehicle or electric vehicle |
| CN107079531A (en) * | 2014-07-21 | 2017-08-18 | 谢彦君 | A kind of electric heat-producing machine and preparation method thereof |
-
2009
- 2009-04-16 CN CN2009200547291U patent/CN201401860Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102668691A (en) * | 2010-03-30 | 2012-09-12 | 贝洱海拉温控***有限公司 | Electric heating system, in particular for a hybrid vehicle or electric vehicle |
| CN102668691B (en) * | 2010-03-30 | 2016-02-03 | 贝洱海拉温控***有限公司 | Be used in particular for the electric heating system of hybrid vehicle or electric automobile |
| CN107079531A (en) * | 2014-07-21 | 2017-08-18 | 谢彦君 | A kind of electric heat-producing machine and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100210 |
|
| CX01 | Expiry of patent term |