CN105025605A - Intelligent control electromagnetic heater - Google Patents
Intelligent control electromagnetic heater Download PDFInfo
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- CN105025605A CN105025605A CN201510369901.2A CN201510369901A CN105025605A CN 105025605 A CN105025605 A CN 105025605A CN 201510369901 A CN201510369901 A CN 201510369901A CN 105025605 A CN105025605 A CN 105025605A
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Abstract
The invention discloses an intelligent control electromagnetic heater. The intelligent control electromagnetic heater comprises an electromagnetic heater body and an intelligent control device; the electromagnetic heater body comprises a rectifying device, an inverter, an electromagnetic coil and a heating sheet; the intelligent control device comprises a control circuit, a negative temperature coefficient thermistor, a power supply, an electronic switch and an external power supply; the control circuit comprises a current measurement module, a counting module and a control module; and the current measurement module is used to measure a current of the negative temperature coefficient thermistor, the counting module is used to count a frequency of the fact that a current measured by the current measurement module reaches a preset threshold, and a control module is used to control the electronic switch to be disconnected when the counting module reaches a preset frequency. The intelligent control electromagnetic heater adopts an electromagnetic heating mode, and has higher heat efficiency compared with a heater adopting a traditional resistance heating mode and a heater adopting a traditional microwave type heating mode; the problem of circulation heating, caused by a forgetting or unattended condition, of an electromagnetic heater is effectively solved through arrangement of the intelligent control device, and loss, caused by the circulation heating, of the electromagnetic heater is prevented.
Description
Technical field
The present invention relates to a kind of electromagnetic heater, be specifically related to a kind of Based Intelligent Control electromagnetism heater.
Background technology
Energy shortage has become the major issue of restriction China economic development.In the primary energy consumption of current China is formed, coal has just accounted for 66%.At present, the heating system that China dominates is still the central heating based on fire coal, in annual coal consumption, heating consumption coal account for again half nearly, its drawback displays day by day simultaneously: be first waste energy and resource, secondly the heat energy lost in such as coal resources, water resources and transmitting procedure be contaminated environment.Therefore, innovation heating system, adopt new thermal source, for minimizing energy resource consumption, protection of the environment, build a conservation-minded society significant.
Electric heater is a kind of high-quality long-life electric heating equipment of international popular, and it is the process converting electrical energy into heat energy.After discovery power supply thermal effect can occur by wire, just many inventors engage in research and the manufacture of various electric heating appliance in the world.Electric heater is mainly used in the liquid state flowed, the intensification of gaseous medium, insulation, heating, when heat medium is under pressure by electric heater heating chamber, adopt thermodynamic fluid principle to take away in electric heating element work the huge heat produced equably, make heated medium temperature reach user's technological requirement.More common electric heater mode of heating is resistance heating at present, utilizes the Joule effect of electric current to become heat energy with heating object converting electric energy, is usually divided into direct resistance heating and indirect resistance heating.The heating of common Resistant heating, ceramic heater and electrical coil resistance, quartz ampoule principle of heating all belong to resistance heating.
But the heating of resistance type heater is the most original, so the heat efficiency is also the poorest, the usual heat efficiency only has about 70 percent, and a large amount of heat energy is dispersed in air.It is better that microwave heating compares resistance heating, but still have a large amount of heats to be dispersed in air, is not only that microwave itself is dispersed in air, but by the object heated, heat is dispersed in air.Simultaneously; current existing electric heater; heating can be stopped by automatic shutdown circuit when temperature reaches uniform temperature, and can heat lower than restarting during uniform temperature in temperature, but; because electric heater is long for heating time; people often can forget the electric heater heated, and after this just causes electric heater to heat, in a period of time, temperature declines, and can reheat again; also can shorten the useful life of electric heater while consume electric power, and have the potential safety hazards such as breaking out of fire.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of Based Intelligent Control electromagnetism heater, comprise intelligent controlling device and electromagnetic heater, described electromagnetic heater comprises rectifying device, inverter, solenoid, heating plate, and described intelligent controlling device comprises control circuit, electronic switch, power supply, external power supply and negative tempperature coefficient thermistor; Wherein,
Described power supply is DC power supply, and described external power supply is AC power;
One end of described rectifying device connects described electronic switch, the other end connects described inverter, described rectifying device is used for carrying out rectification process to external power supply, described inverter is used for carrying out inversion process to the electric current after rectifying device rectification, described solenoid one end connects described inverter, and the other end connects heating plate;
One end of described electronic switch connects external power supply, and the other end connects described electromagnetic heater;
Described power supply is connected with described negative tempperature coefficient thermistor and described control circuit, and is connected into a closed-loop path;
Described control circuit comprises current measurement module, counting module and control module, described current measurement module is for measuring the electric current of described closed-loop path, described counting module reaches the number of times of default threshold value for the electric current calculating described current measurement module and measure, described control module is used for the connection or the disconnection that control electronic switch when the electric current that described current measurement module measures reaches predetermined value, and remains open for controlling described electronic switch when the counting of described counting module reaches predetermined threshold value.
Preferably, described controller is programmable logic controller (PLC).
Alternatively, described inverter comprises thyristor, filter.
Preferably, described rectifying device is electron tube.
Further, described rectifying device is crystal diode.
Preferably, described heating plate is magnetic conductive metal.
Alternatively, described Based Intelligent Control electromagnetism heater also comprises alarm module, and described alarm module is connected with described power supply and control circuit respectively, sends alarm signal when the electric current for measuring at described current measurement module reaches default threshold value.
Preferably, described alarm module is used for, when described counting module reaches predetermined number of times, alarm signal occurs.
Further, the data automatic clear after a loss of power of described counting module storage.
Alternatively, it is characterized in that, described control module is logical circuit.
Application the present invention, has following beneficial effect:
The present invention is by arranging intelligent controlling device, circulating-heating number of times is judged by counting module, and heating power supply is cut off in the disconnection when heating times reaches a certain amount of by controlling electronic switch, thus efficiently solve because forgeing or unattendedly causing the hydronic problem of electromagnetic heater, avoid the loss that circulating-heating causes electromagnetic heater, and can electric energy be saved, energy-conserving and environment-protective.
The electric heater that the present invention is arranged is electromagnetic heater, external power supply produces high-frequency and high-voltage alternating current by rectifying device and inverter, through solenoid, produce alternating magnetic field, make magnetic conductive metal in magnetic field produce the electric current of alternation, alternating current makes the atom high speed random motion of metal inside, and atom collides with each other, rub and produce heat energy, thus be heat energy by electric energy conversion, play the effect of heating objects.Because electromagnetic heater is magnetic conductive metal self-heating, so the heat efficiency is high especially, can reach 95%, all higher than the heat efficiency of the heating of traditional resistance-type and microwave type heating, and safety and reliability.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art and advantage, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structured flowchart of the Based Intelligent Control electromagnetism heater that the embodiment of the present invention one, two provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
Embodiment one:
Refer to Fig. 1, embodiments provide a kind of Based Intelligent Control electromagnetism heater, comprise intelligent controlling device and electromagnetic heater, described electromagnetic heater comprises rectifying device, inverter, solenoid, heating plate, and described intelligent controlling device comprises control circuit, electronic switch, power supply, external power supply and negative tempperature coefficient thermistor; Wherein, described power supply is DC power supply, and described external power supply is AC power; One end of described rectifying device connects described electronic switch, the other end connects described inverter, described rectifying device is used for carrying out rectification process to external power supply, alternating current is become direct current, described inverter is used for carrying out inversion process to the direct current after rectifying device rectification, and change alternating current into, described solenoid one end connects described inverter, the other end connects heating plate, and described heating plate is magnetic conductive metal;
When the alternating current of change at a high speed flows through solenoid, the alternating magnetic field of change at a high speed can be produced, when being placed on alternating magnetic field with magnetic conductive metal and being inner, metal surface is gathered cutting alternate magnetic force line and produces the electric current (i.e. eddy current) of alternation in metal inside part, eddy current makes the atom high speed random motion of metal inside, atom collides with each other, rub and produce heat energy, thus plays the effect of heating objects;
One end of described electronic switch connects external power supply, and the other end connects described electromagnetic heater; Described power supply is connected with described negative tempperature coefficient thermistor and described control circuit, and is connected into a closed-loop path;
Described control circuit comprises current measurement module, counting module and control module, described current measurement module is for measuring the electric current of described closed-loop path, described counting module reaches the number of times of default threshold value for the electric current calculating described current measurement module and measure, described control module is used for the connection or the disconnection that control electronic switch when the electric current that described current measurement module measures reaches predetermined value, and remains open for controlling described electronic switch when the counting of described counting module reaches predetermined threshold value.
Negative tempperature coefficient thermistor is for main material with metal oxides such as manganese, cobalt, nickel and copper, the manufacture of employing ceramic process, these metal oxide materials all have semiconductor property because on electrically conducting manner the semi-conducting material such as all fours germanium, silicon.When temperature is low, charge carrier (electronics and the hole) number of these oxide materials is few, so its resistance value is higher; Along with the rising of temperature, charge carrier number increases, so resistance value reduces.
When circuit normally works, negative tempperature coefficient thermistor temperature and room temperature is close, resistance is higher, the electric current that results through in circuit of connecting is less; And when temperature is higher, when exceeding switch temperature, resistance reduces instantaneously, and the electric current in loop increases rapidly, after thermistor action, in circuit, electric current has had and has significantly promoted.Adopt negative tempperature coefficient thermistor temperature signal can be converted to the signal of telecommunication, thus realize the control of control circuit based on temperature.
The temperature of electromagnetic heater is divided into low temperature open temp and high temperature cut-off temperature, when high temperature cut-off temperature to refer to higher than predetermined temperature as 60 DEG C, stop the temperature of heating, when ending temperature when reaching a high temperature, correspondingly, negative tempperature coefficient thermistor resistance is reduced to certain value, and the electric current in described closed-loop path also brings up to certain value, control module in control circuit controls electronic switch open circuit, and electromagnetic heater stops heating; Low temperature open temp refers to lower than predetermined temperature, and during as 20 DEG C, electromagnetic heater starts the temperature heated.When reaching low temperature open temp, correspondingly, the thermistor resistance of negative temperature coefficient increases to certain value, and the electric current of closed circuit is also reduced to certain value, and the control module in control circuit controls electronic switch and connects circuit, and electromagnetic heater starts heating.Current measurement module measures electric current when reaching predetermined temperature such as high temperature cut-off temperature, the count value of counting module adds one, when the count value of counting module reach predetermined value as three time, the control module in control circuit controls electronic switch and remains open, and electromagnetic heater no longer heats.
Preferably, described controller is programmable logic controller (PLC).
Alternatively, described inverter comprises thyristor, filter, and described thyristor is alternating current for changing direct current, and the alternating current that described filter is used for described thyristor to change carries out filtering process.
Preferably, described rectifying device is electron tube.
Alternatively, described Based Intelligent Control electromagnetism heater also comprises alarm module, and described alarm module is connected with described power supply and control circuit respectively, sends alarm signal when the electric current for measuring at described current measurement module reaches default threshold value.
Preferably, described alarm module is used for, when described counting module reaches predetermined number of times, alarm signal occurs.
Further, the data automatic clear after a loss of power of described counting module storage.
Alternatively, it is characterized in that, described control module is logical circuit.
Application the present invention, has following beneficial effect:
The present invention is by arranging intelligent controlling device, circulating-heating number of times is judged by counting module, and heating power supply is cut off in the disconnection when heating times reaches a certain amount of by controlling electronic switch, thus efficiently solve because forgeing or unattendedly causing the hydronic problem of electromagnetic heater, avoid the loss that circulating-heating causes electromagnetic heater, and can electric energy be saved, energy-conserving and environment-protective.
The electric heater that the present invention is arranged is electromagnetic heater, external power supply produces high-frequency and high-voltage alternating current by rectifying device and inverter, through solenoid, produce alternating magnetic field, make magnetic conductive metal in magnetic field produce the electric current of alternation, alternating current makes the atom high speed random motion of metal inside, and atom collides with each other, rub and produce heat energy, thus be heat energy by electric energy conversion, play the effect of heating objects.Because electromagnetic heater is magnetic conductive metal self-heating, so the heat efficiency is high especially, can reach 95%, all higher than the heat efficiency of the heating of traditional resistance-type and microwave type heating, and safety and reliability.
Embodiment two:
Refer to Fig. 1, embodiments provide a kind of Based Intelligent Control electromagnetism heater, comprise intelligent controlling device and electromagnetic heater, described electromagnetic heater comprises rectifying device, inverter, solenoid, heating plate, and described intelligent controlling device comprises control circuit, electronic switch, power supply, external power supply and negative tempperature coefficient thermistor; Wherein, described power supply is DC power supply, and described external power supply is AC power; One end of described rectifying device connects described electronic switch, the other end connects described inverter, described rectifying device is used for carrying out rectification process to external power supply, alternating current is become direct current, described inverter is used for carrying out inversion process to the direct current after rectifying device rectification, and change alternating current into, described solenoid one end connects described inverter, the other end connects heating plate, and described heating plate is magnetic conductive metal;
When the alternating current of change at a high speed flows through solenoid, the alternating magnetic field of change at a high speed can be produced, when being placed on alternating magnetic field with magnetic conductive metal and being inner, metal surface is gathered cutting alternate magnetic force line and produces the electric current (i.e. eddy current) of alternation in metal inside part, eddy current makes the atom high speed random motion of metal inside, atom collides with each other, rub and produce heat energy, thus plays the effect of heating objects;
One end of described electronic switch connects external power supply, and the other end connects described electromagnetic heater; Described power supply is connected with described negative tempperature coefficient thermistor and described control circuit, and is connected into a closed-loop path;
Described control circuit comprises current measurement module, counting module and control module, described current measurement module is for measuring the electric current of described closed-loop path, described counting module reaches the number of times of default threshold value for the electric current calculating described current measurement module and measure, described control module is used for the connection or the disconnection that control electronic switch when the electric current that described current measurement module measures reaches predetermined value, and remains open for controlling described electronic switch when the counting of described counting module reaches predetermined threshold value.
Negative tempperature coefficient thermistor is for main material with metal oxides such as manganese, cobalt, nickel and copper, the manufacture of employing ceramic process, these metal oxide materials all have semiconductor property because on electrically conducting manner the semi-conducting material such as all fours germanium, silicon.When temperature is low, charge carrier (electronics and the hole) number of these oxide materials is few, so its resistance value is higher; Along with the rising of temperature, charge carrier number increases, so resistance value reduces.
When circuit normally works, negative tempperature coefficient thermistor temperature and room temperature is close, resistance is higher, the electric current that results through in circuit of connecting is less; And when temperature is higher, when exceeding switch temperature, resistance reduces instantaneously, and the electric current in loop increases rapidly, after thermistor action, in circuit, electric current has had and has significantly promoted.Adopt negative tempperature coefficient thermistor temperature signal can be converted to the signal of telecommunication, thus realize the control of control circuit based on temperature.
The temperature of electromagnetic heater is divided into low temperature open temp and high temperature cut-off temperature, when high temperature cut-off temperature to refer to higher than predetermined temperature as 60 DEG C, stop the temperature of heating, when ending temperature when reaching a high temperature, correspondingly, negative tempperature coefficient thermistor resistance is reduced to certain value, and the electric current in described closed-loop path also brings up to certain value, control module in control circuit controls electronic switch open circuit, and electromagnetic heater stops heating; Low temperature open temp refers to lower than predetermined temperature, and during as 20 DEG C, electromagnetic heater starts the temperature heated.When reaching low temperature open temp, correspondingly, the thermistor resistance of negative temperature coefficient increases to certain value, and the electric current of closed circuit is also reduced to certain value, and the control module in control circuit controls electronic switch and connects circuit, and electromagnetic heater starts heating.Current measurement module measures electric current when reaching predetermined temperature such as high temperature cut-off temperature, the count value of counting module adds one, when the count value of counting module reach predetermined value as three time, the control module in control circuit controls electronic switch and remains open, and electromagnetic heater no longer heats.
Preferably, described controller is programmable logic controller (PLC).
Alternatively, described inverter comprises thyristor, filter, and described thyristor is alternating current for changing direct current, and the alternating current that described filter is used for described thyristor to change carries out filtering process.
Further, described rectifying device is crystal diode.
Alternatively, described Based Intelligent Control electromagnetism heater also comprises alarm module, and described alarm module is connected with described power supply and control circuit respectively, sends alarm signal when the electric current for measuring at described current measurement module reaches default threshold value.
Preferably, described alarm module is used for, when described counting module reaches predetermined number of times, alarm signal occurs.
Further, the data automatic clear after a loss of power of described counting module storage.
Alternatively, it is characterized in that, described control module is logical circuit.
Application the present invention, has following beneficial effect:
The present invention is by arranging intelligent controlling device, circulating-heating number of times is judged by counting module, and heating power supply is cut off in the disconnection when heating times reaches a certain amount of by controlling electronic switch, thus efficiently solve because forgeing or unattendedly causing the hydronic problem of electromagnetic heater, avoid the loss that circulating-heating causes electromagnetic heater, and can electric energy be saved, energy-conserving and environment-protective.
The electric heater that the present invention is arranged is electromagnetic heater, external power supply produces high-frequency and high-voltage alternating current by rectifying device and inverter, through solenoid, produce alternating magnetic field, make magnetic conductive metal in magnetic field produce the electric current of alternation, alternating current makes the atom high speed random motion of metal inside, and atom collides with each other, rub and produce heat energy, thus be heat energy by electric energy conversion, play the effect of heating objects.Because electromagnetic heater is magnetic conductive metal self-heating, so the heat efficiency is high especially, can reach 95%, all higher than the heat efficiency of the heating of traditional resistance-type and microwave type heating, and safety and reliability.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a Based Intelligent Control electromagnetism heater, it is characterized in that, comprise intelligent controlling device and electromagnetic heater, described electromagnetic heater comprises rectifying device, inverter, solenoid, heating plate, and described intelligent controlling device comprises control circuit, electronic switch, power supply, external power supply and negative tempperature coefficient thermistor; Wherein,
Described power supply is DC power supply, and described external power supply is AC power;
One end of described rectifying device connects described electronic switch, the other end connects described inverter, described rectifying device is used for carrying out rectification process to external power supply, described inverter is used for carrying out inversion process to the electric current after rectifying device rectification, described solenoid one end connects described inverter, and the other end connects heating plate;
One end of described electronic switch connects external power supply, and the other end connects described electromagnetic heater;
Described power supply is connected with described negative tempperature coefficient thermistor and described control circuit, and is connected into a closed-loop path;
Described control circuit comprises current measurement module, counting module and control module, described current measurement module is for measuring the electric current of described closed-loop path, described counting module reaches the number of times of default threshold value for the electric current calculating described current measurement module and measure, described control module is used for the connection or the disconnection that control electronic switch when the electric current that described current measurement module measures reaches predetermined value, and remains open for controlling described electronic switch when the counting of described counting module reaches predetermined threshold value.
2. a kind of Based Intelligent Control electromagnetism heater according to claim 1, it is characterized in that, described controller is programmable logic controller (PLC).
3. a kind of Based Intelligent Control electromagnetism heater according to claim 1 and 2, it is characterized in that, described inverter comprises thyristor, filter.
4. a kind of Based Intelligent Control electromagnetism heater according to claim 1, it is characterized in that, described rectifying device is electron tube.
5. a kind of Based Intelligent Control electromagnetism heater according to claim 1, it is characterized in that, described rectifying device is crystal diode.
6. a kind of Based Intelligent Control electromagnetism heater according to claim 1, it is characterized in that, described heating plate is magnetic conductive metal.
7. a kind of Based Intelligent Control electromagnetism heater according to any one of claim 4-6, it is characterized in that, described Based Intelligent Control electromagnetism heater also comprises alarm module, described alarm module is connected with described power supply and control circuit respectively, sends alarm signal when the electric current for measuring at described current measurement module reaches default threshold value.
8. a kind of Based Intelligent Control electromagnetism heater according to claim 7, is characterized in that, described alarm module is used for, when described counting module reaches predetermined number of times, alarm signal occurs.
9. a kind of Based Intelligent Control electromagnetism heater according to claim 8, is characterized in that, the data automatic clear after a loss of power that described counting module stores.
10. a kind of Based Intelligent Control electromagnetism heater according to claim 8 or claim 9, it is characterized in that, described control module is logical circuit.
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| CN201510369901.2A CN105025605A (en) | 2015-06-29 | 2015-06-29 | Intelligent control electromagnetic heater |
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| CN201510369901.2A CN105025605A (en) | 2015-06-29 | 2015-06-29 | Intelligent control electromagnetic heater |
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Cited By (1)
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| CN110085387A (en) * | 2019-05-22 | 2019-08-02 | 上海联影医疗科技有限公司 | A kind of superconducting magnet system |
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Application publication date: 20151104 |