CN1549653A - Self-controlling temperature protective heater - Google Patents
Self-controlling temperature protective heater Download PDFInfo
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- CN1549653A CN1549653A CNA031237096A CN03123709A CN1549653A CN 1549653 A CN1549653 A CN 1549653A CN A031237096 A CNA031237096 A CN A031237096A CN 03123709 A CN03123709 A CN 03123709A CN 1549653 A CN1549653 A CN 1549653A
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Abstract
A heater comprises a thick film metallization between plate, a signal touch-control switch, a detection reference circuit, a control circuit, a signal amplifier circuit and a temperature setting circuit. It works as the follows: power is sent to thick film metallization base plate through touch-control switch as well as to internal heating circuit of base plate, connection signal is received by temperature setting circuit and to send it to a corresponding input end of control circuit, power is sent to another corresponding input end of control circuit through detection circuit output end of control circuit is connected with touch-control end of touch-control switch.
Description
Invention field
The invention belongs to the electroheat technology field; especially constitute a kind of self-temperature control protection heater with the heating element of innovation and the thermostat that is attached thereto effect, reach than conventional heater macro-energy more can be provided moment, area is little, efficient is high and have the function of constant temperature self-protection.
Background technology
Heat energy is the indispensable in the world energy, from the warm tellurian all biologies of nature thermals source such as underground heat, sunlight, to such an extent as to we human ancestors find to use fiery prepared food, drives cold night and wild beast, all is to be dependent on heat energy to bring our benefit.
And be dependent on nature thermal source loses heat energy passively, or only obtain the mode of heat to light a fire, can't satisfy prosperous modern civilization, the human now capability improving of grasping energy science and technology, utilized scientific knowledge, industrial production goes out various heaters, and it is more convenient that heat energy is obtained, and more in time meets required specified temperature.And along with artificial electric power is popularized the world everywhere, the most normal heater that is used and mentions, often be meant a kind of electric heating element that converts electric energy to heat energy, no matter on military affairs, industry or the people's livelihood, it all is an important and indispensable element, the energy that heater consumed accounts for the very big ratio of the whole world energy, and developing high efficiency, a heating element with low cost is the target that everybody pursues.
At present the city and on heater miscellaneous is arranged.But with the heater of civil power (alternating current) power supply or based on " heating wire " (nichrome wire), shown in Fig. 1 electrothermal furnace STRUCTURE DECOMPOSITION figure, this class is utilized the electrical equipment of heating wire 10 heating, must be outside its heating wire 10 every the sheathed layer of metal calandria 30 of sky, the heating wire 10 of heating sees through surrounding space 20, warms METAL HEATING PROCESS body 30, is heated thing by these METAL HEATING PROCESS body 30 contacts again, though it has with low cost, there are many as described below shortcomings.
1, the heat efficiency is low
Because the transfer mode of heat can be divided into conduction, convection current, radiation, conduction of velocity is penetrated for conduction＞convection current＞width of cloth in regular turn, and can not directly contact heating object because heating wire is charged, the transfer mode of heat is to penetrate based on the width of cloth, convection current is for mending, thermal convection with gas in the surrounding space and METAL HEATING PROCESS body, penetrate with the width of cloth again and transfer heat to the METAL HEATING PROCESS body, the heat-transfer path that is heated of METAL HEATING PROCESS body can't be direct as conduction pattern, a lot of heat energy looses to useless place, and because heat transfer rate is low, make between heating wire and heating object temperature fall big, consider that heating wire can be burnt, heating wire can not strengthen simply, so the power supply wattage is less, heating object reaches temperature required time elongation, it is more to the heat energy in useless area to loose, efficient is lower, and if other is wound on the insulator (mica sheet) with heating wire, insulator is worked as with mica sheet again in the outside, be affixed on person on the heating object, this mode no doubt can contact closely, can not leak electricity to heating object, meets conductibility, but the good conductor of the non-heat of mica sheet, heat transmit still and are difficult for.
2, fail safe is low
Because of heating wire can burn hot rubescent in high temperature, be easy to generate burning things which may cause a fire disaster and cause disaster, and the oxygen in the meeting combustion air, continue to cause the gas combustion of trace to pollute, in addition as electric soupspoon etc. in order to household appliances of cooking to boil water, its immerging metal tube heater outer layer metal easily is heated in the micro-pass into solution, makes and builds up the poisonous metal material in the drinking person body.
In view of existing heater has above-mentioned various shortcoming, the inventor is the road of active research improvement, through some hard invention process, so propose the present invention.
Summary of the invention
The present invention aims to provide a kind of self-temperature control protection heater; it is so that " thick-film metalliz substrate (Thick Film Metalized Substrate) method is made; be on plane pottery (ceramic A12O3) substrate; print sintering with thick-film material; work as lead with conductor; x works as heater with resistance R, prints temperature effect resistance (Rs) with electrically conductive ink or low ohm value printing ink simultaneously.With ceramic substrate (be heat good conductor) when insulator and heat transfer medium, can directly be attached on the heating object, moment can provide big wattage (size as Fig. 2 can promote 100W), because printing ink is sintered in 850 ℃, but undergo no deterioration so spend near the heatproof degree to 500 ℃, can directly conduct heat energy to heating object, thermal efficiency ratio has the heater height now, and this is a main purpose of the present invention.
Moreover; self-temperature control protection heater of the present invention; its Low ESR printing ink (Thick Film Paste) especially conductor ink (Conductor Paste) impedance to variation of temperature rate (TemperatureCoefficient Resistance TCR) height; it changes the variation that just can be used to corresponding temperature; make temperature adjusting extremely flexible; and the temperature inductor in the thermostat is on same substrate; add control circuit accurately the control basal plate temperature do not exceed the maximum temperature of setting; so can make heater moment that very big wattage can be provided in design; can first self-protection when substrate itself arrives maximum design temperature; when treating that temperature passes to the decline of heating object temperature on the substrate; conducting electric heating electric power again; but so at constant temperature on the substrate on a design temperature; treat that heating object arrives when temperature required, feed back a signal and control electric heating power supply conducting jointly that reaching moment can provide big wattage; self-protection and thermostatically controlled function, this is an another purpose of the present invention.
Moreover; the self-temperature control protection of this kind of the present invention heater; whole control circuit needn't any transformer just can be reached the protection setting below 500 ℃; the proof voltage scope is wide; be difficult for burning out because of high pressure-temperature; can be by the power circuit of filter serial connection bridge rectifier with AC rectification; the signal touch switch of one control heater (promptly hereinafter described ceramic conduct electricity heat generator) conducting; a ceramic heater (being printed on heater Rx+ temperature sense resistance R s on the substrate); one signal amplification circuit; one temperature setting circuit; one detecting reference circuit; an and control circuit complete hot temperature control system that is formed by connecting; constitute in detail and hold the back narration; it has characteristics easy to implement, and this is a further object of the present invention.
In addition, the self-temperature control protection of this kind of the present invention heater is because pottery itself has the heat transfer heatproof; belong to insulator again, it directly contacts heating object with pottery, does not worry leaking electricity to heating object; fail safe is high in the use, and this is an another object of the present invention.
Description of drawings
As for detailed construction of the present invention, application principle, effect and effect, then the explanation of doing with reference to following adjoint can be understood completely.
Fig. 1 is the electrothermal furnace STRUCTURE DECOMPOSITION figure of existing strip heater.
Fig. 2 is the plane ceramic substrate structure schematic diagram of the present invention oneself temperature control protection heater.
Fig. 3 is the integrated circuit figure of the present invention oneself temperature control protection heater.
Another implements circuit diagram to Fig. 4 for the present invention oneself temperature control protection heater.
Each element shown numbering and title contrast
10 ... heating wire 211 ... bridge rectifier
20 ... surrounding space 220 ... the signal touch switch
30 ... METAL HEATING PROCESS body 230 ... the detecting reference circuit
100 ... thick-film metalliz substrate 240 ... control circuit
101 ... heating resistor 250 ... signal amplification circuit
102 ... temperature sense resistance 260 ... temperature setting circuit
200 ... thermostat 300 ... single-chip IC
210 ... power circuit
Embodiment
Figure 1 shows that the electrothermal furnace structural diagrams of existing strip heater, the disappearance that is caused in structure shown in this figure and the use as previously mentioned, repeats no more herein.
Fig. 2 is the plane ceramic substrate structure schematic diagram of the present invention oneself temperature control protection heater, and it constitutes situation as previously mentioned, also repeats no more herein.
Fig. 3 is the integrated circuit figure of the present invention oneself temperature control protection heater; by shown in this figure as can be known; it is by a thick-film metalliz substrate 100; one power circuit 210; one signal touch switch 220; one detecting reference circuit 230; one control circuit 240; one signal amplification circuit 250; an and temperature setting circuit 260 formations; this control circuit 240 can be the single-chip that a function is complementary; and this power circuit 210 can go out whole required supply electric power with AC rectification by a bridge rectifier 211; this circuit 210 can (be a common component by filter also; not shown in the figures) be connected in series this bridge rectifier 211 and constitute; make the electric power of power circuit 210 deliver to thick-film metalliz substrate 100 through signal touch switch 220, and the inside heating line of thick-film metalliz substrate 100.Signal amplification circuit 250 is connected to temperature setting circuit 260, deliver to control circuit 240 corresponding inputs by temperature setting circuit 260 again, and the electric power of power circuit 210 is delivered to control circuit 240 another corresponding inputs through detecting reference circuit 230 in addition, and control circuit 240 outputs connect the touch-control end of signal touch switch 220.Inside heating line as for thick-film metalliz substrate 100, as shown in the figure, can be a heating resistor 101 1 ends and contact a temperature sense resistance 102 to earthing potential, signal amplification circuit 250 is connected between heating resistor 101 and the temperature sense resistance 102, and heating resistor 101 other ends connect signal touch switch 220, make power supply behind the bridge rectifier and signal touch switch 220 and heating resistor 101 and temperature sense resistance 102 form series loops.
Since heating resistor 101 printing ink TCR low (≤1100PPM), variations in temperature changes little to loop current, though the TCR of temperature sense resistance 102 has 1000PPM, but resistance is too little (with regard to experimental condition, making heating resistor 101 is 200 ohm, temperature sense resistance 102 is 0.20 ohm) very little to current affects, whole heating resistor 101 serial connection temperature sense resistance 102 are under variations in temperature, and its whole change in resistance is little.If can be a detecting point in sinusoidal wave each periodic voltage reference settings one value, can regard weekly the phase as at this detecting point and decide electrical voltage point (the detecting point is set circuit), this electric current of deciding electrical voltage point is fixing not temperature influence, again because the resistance value that this electric current of deciding electrical voltage point (this decides electrical voltage point and is called for short VL) multiply by temperature sense resistance 102 draws the signal (being called for short VRS) of delivering to signal amplification circuit 250, and since the VL electric current of ordering fix, VRS will vary with temperature and change, temperature sense resistance 102 values rose when temperature rose, VRS rises to scale, otherwise temperature descends, and VRS descends.
By signal amplification circuit 205 this VRS signal is amplified again, increase its discriminating power, change the reference direct voltage reference of a comparator, come comparison at VL point and VRS, when temperature is higher than set point, controller 240 at this moment between point can receive a signal (this signal be called for short H1), when temperature is lower than set point, controller 240 can be received a signal L0 opposite with H1 (this signal is called for short L0) at this moment, is H1 or L0 according to control circuit 240 at VL point time detecting input signal, export a signal again and come control signal touch switch 220,, then trigger this switch 220 and keep heating resistor 101 conductings if control circuit 240 detects signal L0 when the VL point, make heating resistor 101 continue heating, promote temperature, and, then trigger this switch 220 to disconnect if control circuit 240 detects signal H1 when the VL in follow-up electric wave cycle point, suspend the conducting of heating resistor 101, make temperature no longer promote and fall back, kept temperature, reach thermostatically controlled effect.
In addition; because mould/number (A/D); the single-chip IC of D/A (D/A) is very ripe; can be with above-mentioned three part circuit; signal is put into circuit 250; temperature setting circuit 260; detecting point reference circuit 230; another is implemented shown in the circuit diagram as Fig. 4; all can be incorporated into same single-chip IC (300) the inside (scope in shown by reference numeral 300 frames) and simplify circuit; the comparator (shown by reference numeral Op2 person) that its temperature is set can be imported a direct voltage reference that changes in addition and amplify the VRS that obtains and compare; and the signal touch switch 220 of conducting heating is to carry out with silicon control rectifier (SCR); and this circuit 240 removes to detect above-mentioned voltage (entering the I1 terminal voltage of this circuit 240) at VL Voltage Reference time point (by the I2 of this circuit 240 end announcement); control this silicon control rectifier (SCR) by circuit 240 output O1 again; drive control heating conducting; and the output O1 of this circuit 240 can design each cycle by internal processes and have at least a small electric power conducting to detect VRS; the conducting of controlling this silicon control rectifier (SCR) according to voltage (I1) situation reaches constant temperature protection or thermostatic control again; the signal that the I3 end of this circuit 240 is used to cooperate the temperature sensor scheme on the heating object to send back to; as I3=H1/L0 (H1; L0 sees above-mentioned explanation) represent heating object to arrive or do not reached the temperature of demand; control this silicon control rectifier (SCR) jointly by I3, reach the self-protection of heater maximum temperature and the control of heating object constant temperature.
From the above as can be known; the self-temperature control protection of this kind of the present invention heater; really reach than conventional heater more can provide moment macro-energy, area little, have constant temperature self-protection; and not via immerging metal tube heater heat conduction; can not cause the safety function of metal pass into solution injury human body; and be not seen in public use, close regulation in Patent Law.
The above is the preferable specific embodiment of the present invention, if comply with the change that conception of the present invention is done, and the function of its generation, when not exceeding specification yet and illustrating contained spiritual, all should be in the scope of claim of the present invention.
Claims (5)
1, a kind of self-temperature control protection heater comprises:
A rectification circuit is responsible for providing DC power supply;
A thick-film metalliz substrate, wherein substrate is provided with two resistance, a heating resistor and a temperature sense resistance;
A signal touch switch, this signal touch switch can be electronic type or mechanical switch, forms series circuit with above-mentioned rectification circuit, heating resistor, temperature sense resistance, is responsible for the power supply supply of control heating resistor and temperature sense resistance;
A signal amplification circuit is responsible for acting on the ohmically voltage signal of temperature sense and is amplified;
A temperature setting circuit is used for design temperature;
A control circuit is responsible for detecting, is ordered this signal touch switch running, and
A detecting point reference circuit is responsible for providing the detecting time point to give this control circuit;
Wherein above-mentioned rectification circuit, switch, heating resistor, and temperature sense resistance form series circuit.
2, self-temperature control protection heater as claimed in claim 1; wherein signal touch switch, heating resistor, temperature sense resistance configuration become: signal touch switch one end is connected power supply; the other end connects heating resistor one end, and the other end of heating resistor connects temperature sense resistance.
3, self-temperature control protection heater as claimed in claim 1; wherein signal touch switch, heating resistor, temperature sense resistance configuration become: heating resistor one end is connected power supply; the other end connects signal touch switch one end, and the other end by the signal touch switch connects temperature sense resistance again.
4,, self-temperature control protection heater as claimed in claim 1; wherein signal touch switch, heating resistor, temperature sense resistance configuration become: heating resistor one end is connected power supply; the other end connects an end of temperature sense resistance, and the other end by temperature sense resistance connects the signal touch switch again.
5,, self-temperature control as claimed in claim 1 protection heater, described signal amplification circuit, temperature setting circuit, detecting point reference circuit can be integrated into a single-chip IC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031237096A CN1549653A (en) | 2003-05-20 | 2003-05-20 | Self-controlling temperature protective heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031237096A CN1549653A (en) | 2003-05-20 | 2003-05-20 | Self-controlling temperature protective heater |
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| Publication Number | Publication Date |
|---|---|
| CN1549653A true CN1549653A (en) | 2004-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031237096A Pending CN1549653A (en) | 2003-05-20 | 2003-05-20 | Self-controlling temperature protective heater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102197705B (en) * | 2008-10-29 | 2013-11-06 | 松下电器产业株式会社 | Induction heating cooker |
| CN106163306A (en) * | 2014-05-21 | 2016-11-23 | 菲利普莫里斯生产公司 | Induction heating apparatus, the aerosol delivery system including induction heating apparatus and operational approach thereof |
-
2003
- 2003-05-20 CN CNA031237096A patent/CN1549653A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102197705B (en) * | 2008-10-29 | 2013-11-06 | 松下电器产业株式会社 | Induction heating cooker |
| US8674272B2 (en) | 2008-10-29 | 2014-03-18 | Panasonic Corporation | Induction heating cooker |
| CN106163306A (en) * | 2014-05-21 | 2016-11-23 | 菲利普莫里斯生产公司 | Induction heating apparatus, the aerosol delivery system including induction heating apparatus and operational approach thereof |
| US10477894B2 (en) | 2014-05-21 | 2019-11-19 | Philip Morris Products S.A. | Inductive heating device for heating an aerosol-forming substrate |
| CN106163306B (en) * | 2014-05-21 | 2020-03-10 | 菲利普莫里斯生产公司 | Induction heating device, aerosol delivery system including the same, and method of operating the same |
| US10674763B2 (en) | 2014-05-21 | 2020-06-09 | Philip Morris Products S.A. | Inductive heating device, aerosol-delivery system comprising an inductive heating device, and method of operating same |
| US11483902B2 (en) | 2014-05-21 | 2022-10-25 | Philip Morris Products S.A. | Inductive heating device, aerosol-delivery system comprising an inductive heating device, and method of operating same |
| US11844168B2 (en) | 2014-05-21 | 2023-12-12 | Philip Morris Products S.A. | Inductive heating device, aerosol-delivery system comprising an inductive heating device, and method of operating same |
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