CN103984377B - Electric blanket temperature controller - Google Patents
Electric blanket temperature controller Download PDFInfo
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- CN103984377B CN103984377B CN201410205210.4A CN201410205210A CN103984377B CN 103984377 B CN103984377 B CN 103984377B CN 201410205210 A CN201410205210 A CN 201410205210A CN 103984377 B CN103984377 B CN 103984377B
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- reference voltage
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Abstract
The invention discloses a kind of electric blanket temperature controller, it comprises mu balanced circuit, reference voltage generating circuit, metal-oxide-semiconductor, the first hysteresis comparator, the second hysteresis comparator and temperature regulate and thermometric voltage forming circuit, the input of mu balanced circuit is connected with the positive pole of power supply, reference voltage generating circuit, temperature regulates and thermometric voltage forming circuit, the first hysteresis comparator, the positive terminal of the second hysteresis comparator is connected with the output of mu balanced circuit respectively, the earth terminal of mu balanced circuit and reference voltage generating circuit, temperature regulates and thermometric voltage forming circuit, the first hysteresis comparator, the negative pole end of the second hysteresis comparator is all connected with the negative pole of power supply, the drain D of metal-oxide-semiconductor is connected with the positive pole of power supply, the source S of metal-oxide-semiconductor is connected with the negative pole of power supply after connecting electric blanket, the operating voltage input of the first hysteresis comparator is connected with the output of mu balanced circuit respectively with the operating voltage input of the second hysteresis comparator. the present invention can realize preset temperature and adjusting, improves its response speed, and makes easy and simple to handle.
Description
Technical field
The present invention relates to a kind of electric blanket temperature controller.
Background technology
At present, China's electric blanket industry adopts 220V Alternating Current Power Supply substantially, there is certain hidden danger in temperature adjusting and secure context, especially for the elderly and infant, problem is more outstanding, the security using for improving electric blanket, Some Enterprises has been studied and has been adopted the low-voltage electrical heating blanket of carbon fiber as exothermic material at present, this temperature controller is the special temperature-control circuit of developing for this type of electric blanket, it has solved preset temperature, the key issues such as temperature adjusting, in operation, carry out preset temperature and adjusting with potentiometer, to meet the operational requirements of special population.
Summary of the invention
Technical problem to be solved by this invention is the defect that overcomes prior art, and a kind of electric blanket temperature controller is provided, and it can realize preset temperature and adjusting, improves its response speed, and makes easy and simple to handle.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of electric blanket temperature controller, it comprises mu balanced circuit, reference voltage generating circuit, metal-oxide-semiconductor, the first hysteresis comparator, the second hysteresis comparator and temperature regulate and thermometric voltage forming circuit, the input of mu balanced circuit is connected with the positive pole of power supply, reference voltage generating circuit, temperature regulates and thermometric voltage forming circuit, the first hysteresis comparator, the positive terminal of the second hysteresis comparator is connected with the output of mu balanced circuit respectively, the earth terminal of mu balanced circuit and reference voltage generating circuit, temperature regulates and thermometric voltage forming circuit, the first hysteresis comparator, the negative pole end of the second hysteresis comparator is all connected with the negative pole of power supply, the drain D of metal-oxide-semiconductor is connected with the positive pole of power supply, the source S of metal-oxide-semiconductor is connected with the negative pole of power supply after connecting electric blanket, the operating voltage input of the first hysteresis comparator is connected with the output of mu balanced circuit respectively with the operating voltage input of the second hysteresis comparator, described temperature regulates and thermometric voltage forming circuit comprises the resistance R 1 of series connection successively, potentiometer, thermistor and resistance R 2, the thermometric voltage input end of the first hysteresis comparator is connected between potentiometer and thermistor, the first described hysteresis comparator also has the reference voltage input for the reference voltage of input reference voltage generation circuit output, the input of the second described hysteresis comparator is connected with the output of the first hysteresis comparator, the output of the second hysteresis comparator is connected with the grid G of metal-oxide-semiconductor.
A kind of structure that reference voltage is provided to the first hysteresis comparator is further provided, described reference voltage generating circuit comprises resistance R 3, voltage-stabiliser tube and capacitor C3, resistance R 3 and capacitor C3 are in series, voltage-stabiliser tube is connected in parallel on the two ends of capacitor C3, and the reference voltage input of the first described hysteresis comparator is connected between resistance R 3 and capacitor C3.
Further in order to understand well power supply status, this electric blanket temperature controller also comprises power supply status indicating circuit, this power supply status indicating circuit comprises capacitor C2, resistance R 4 and light emitting diode D2, the negative pole end of capacitor C2 is connected with the negative pole of power supply, the positive terminal of capacitor C2 is connected with the output of mu balanced circuit, is connected in parallel on the two ends of capacitor C2 after described resistance R 4 and light emitting diode D2 are in series again.
Further in order to connect well the duty of electric blanket, this electric blanket temperature controller also comprises working state indicating circuit, this working state indicating circuit comprises resistance R 5 and light emitting diode D3, one end of resistance R 5 is connected on the output of the second hysteresis comparator, the other end is connected with one end of light emitting diode D3, and the other end of light emitting diode D3 is connected on the negative pole of voltage.
Further, in order to ensure the safety of electric blanket temperature controller, between the positive pole of power supply and the drain D of metal-oxide-semiconductor, be connected with fuse current foldback circuit.
Adopt after technique scheme, the reference voltage that thermometric voltage and reference voltage generating circuit take out compares, after secondary hysteresis comparator (Schmidt trigger), form power supply break-make control signal to metal-oxide-semiconductor, the function of metal-oxide-semiconductor is contactor function, the power supply break-make control signal forming due to Schmidt trigger is square-wave signal, make metal-oxide-semiconductor work on off state, adopt secondary hysteresis comparator to improve output pulse waveform, reduce the break-make transit time of metal-oxide-semiconductor, improve its its response speed, after general energising, metal-oxide-semiconductor is in conducting state, electric blanket is hankered in adding, the thermometric voltage that temperature regulates and thermometric voltage forming circuit records raises with temperature, in the time that its value reaches the threshold voltage VH of the first hysteresis comparator, metal-oxide-semiconductor cut-off, electric blanket is in the state of naturally rising again, when thermometric voltage reduces with temperature, in the time that its value reaches delayed comparator threshold voltage VL, metal-oxide-semiconductor is sentenced and is proceeded to conducting state, and electric blanket is hankered in adding, by circuit devcie parameter adjustment, can reduce the hysteresis voltage (VH-VL) that delayed comparator makes, thereby improve temperature controlled precision, its preset temperature can regulate to set by potentiometer, employing potentiometer regulates, easy to operate.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of electric blanket temperature controller of the present invention.
Detailed description of the invention
For content of the present invention is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation below.
As shown in Figure 1, a kind of electric blanket temperature controller, it comprises mu balanced circuit, reference voltage generating circuit, metal-oxide-semiconductor Q1, the first hysteresis comparator 1, the second hysteresis comparator 2 and temperature regulate and thermometric voltage forming circuit, the input of mu balanced circuit is connected with the positive pole of power supply, reference voltage generating circuit, temperature regulates and thermometric voltage forming circuit, the first hysteresis comparator 1, the positive terminal of the second hysteresis comparator 2 is connected with the output of mu balanced circuit respectively, the earth terminal of mu balanced circuit and reference voltage generating circuit, temperature regulates and thermometric voltage forming circuit, the first hysteresis comparator, the negative pole end of the second hysteresis comparator is all connected with the negative pole of power supply, the drain D of metal-oxide-semiconductor Q1 is connected with the positive pole of power supply, the source S of metal-oxide-semiconductor Q1 is connected with the negative pole of power supply after connecting electric blanket 3, the operating voltage input of the operating voltage input of the first hysteresis comparator 1 and the second hysteresis comparator 2 is connected with the output of mu balanced circuit respectively, described temperature regulates and thermometric voltage forming circuit comprises the resistance R 1 of series connection successively, potentiometer RW, thermistor PTC and resistance R 2, the thermometric voltage input end of the first hysteresis comparator 1 is connected between potentiometer RW and thermistor PTC, the first described hysteresis comparator 1 also has the reference voltage input for the reference voltage of input reference voltage generation circuit output, the input of the second hysteresis comparator 2 is connected with the output of the first hysteresis comparator 1, the output of the second hysteresis comparator 2 is connected with the grid G of metal-oxide-semiconductor Q1. be the device of 6 milliohms because metal-oxide-semiconductor Q1 in this circuit selects conducting resistance, when work, generate heat hardly, energy-saving effect is obvious. mu balanced circuit can be selected LM7812.
As shown in Figure 1, reference voltage generating circuit comprises resistance R 3, voltage-stabiliser tube D1 and capacitor C3, resistance R 3 and capacitor C3 are in series, and voltage-stabiliser tube D1 is connected in parallel on the two ends of capacitor C3, and the reference voltage input of the first described hysteresis comparator 1 is connected between resistance R 3 and capacitor C3.
In order to understand well power supply status, as shown in Figure 1, this electric blanket temperature controller also comprises power supply status indicating circuit, this power supply status indicating circuit comprises capacitor C2, resistance R 4 and light emitting diode D2, the negative pole end of capacitor C2 is connected with the negative pole of power supply, the positive terminal of capacitor C2 is connected with the output of mu balanced circuit, is connected in parallel on the two ends of capacitor C2 after described resistance R 4 and light emitting diode D2 are in series again.
In order to connect well the duty of electric blanket, as shown in Figure 1, this electric blanket temperature controller also comprises working state indicating circuit, this working state indicating circuit comprises resistance R 5 and light emitting diode D3, one end of resistance R 5 is connected on the output of the second hysteresis comparator 2, the other end is connected with one end of light emitting diode D3, and the other end of light emitting diode D3 is connected on the negative pole of voltage.
In order to ensure the safety of electric blanket temperature controller, as shown in Figure 1, between the positive pole of power supply and the drain D of metal-oxide-semiconductor, be connected with fuse current foldback circuit, in the present embodiment, fuse current foldback circuit is fuse F1.
Operation principle of the present invention is as follows:
The reference voltage that thermometric voltage and reference voltage generating circuit take out compares, after secondary hysteresis comparator (Schmidt trigger), form power supply break-make control signal to metal-oxide-semiconductor, the function of metal-oxide-semiconductor is contactor function, the power supply break-make control signal forming due to Schmidt trigger is square-wave signal, make metal-oxide-semiconductor work on off state, adopt secondary hysteresis comparator to improve output pulse waveform, reduce the break-make transit time of metal-oxide-semiconductor, improve its its response speed, after general energising, metal-oxide-semiconductor is in conducting state, electric blanket is hankered in adding, the thermometric voltage that temperature regulates and thermometric voltage forming circuit records raises with temperature, in the time that its value reaches the threshold voltage VH of the first hysteresis comparator, metal-oxide-semiconductor cut-off, electric blanket is in the state of naturally rising again, when thermometric voltage reduces with temperature, in the time that its value reaches delayed comparator threshold voltage VL, metal-oxide-semiconductor is sentenced and is proceeded to conducting state, and electric blanket is hankered in adding, by circuit devcie parameter adjustment, can reduce the hysteresis voltage (VH-VL) that delayed comparator makes, thereby improve temperature controlled precision, its preset temperature can regulate to set by potentiometer, employing potentiometer regulates, easy to operate.
Above-described specific embodiment; technical problem, technical scheme and beneficial effect that the present invention is solved further describe; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. an electric blanket temperature controller, it is characterized in that: it comprises mu balanced circuit, reference voltage generating circuit, metal-oxide-semiconductor, the first hysteresis comparator, the second hysteresis comparator and temperature regulate and thermometric voltage forming circuit, the input of mu balanced circuit is connected with the positive pole of power supply, reference voltage generating circuit, temperature regulates and thermometric voltage forming circuit, the first hysteresis comparator, the positive terminal of the second hysteresis comparator is connected with the output of mu balanced circuit respectively, the earth terminal of mu balanced circuit and reference voltage generating circuit, temperature regulates and thermometric voltage forming circuit, the first hysteresis comparator, the negative pole end of the second hysteresis comparator is all connected with the negative pole of power supply, the drain D of metal-oxide-semiconductor is connected with the positive pole of power supply, the source S of metal-oxide-semiconductor is connected with the negative pole of power supply after connecting electric blanket, the operating voltage input of the first hysteresis comparator is connected with the output of mu balanced circuit respectively with the operating voltage input of the second hysteresis comparator, described temperature regulates and thermometric voltage forming circuit comprises the resistance R 1 of series connection successively, potentiometer, thermistor and resistance R 2, the thermometric voltage input end of the first hysteresis comparator is connected between potentiometer and thermistor, the first described hysteresis comparator also has the reference voltage input for the reference voltage of input reference voltage generation circuit output, the input of the second described hysteresis comparator is connected with the output of the first hysteresis comparator, the output of the second hysteresis comparator is connected with the grid G of metal-oxide-semiconductor, the reference voltage that reference voltage generating circuit takes out and thermometric voltage compare and after secondary hysteresis comparator, form power supply break-make control signal to metal-oxide-semiconductor.
2. electric blanket temperature controller according to claim 1, it is characterized in that: described reference voltage generating circuit comprises resistance R 3, voltage-stabiliser tube and capacitor C3, resistance R 3 and capacitor C3 are in series, voltage-stabiliser tube is connected in parallel on the two ends of capacitor C3, and the reference voltage input of the first described hysteresis comparator is connected between resistance R 3 and capacitor C3.
3. electric blanket temperature controller according to claim 1, it is characterized in that: also comprise power supply status indicating circuit, this power supply status indicating circuit comprises capacitor C2, resistance R 4 and light emitting diode D2, the negative pole end of capacitor C2 is connected with the negative pole of power supply, the positive terminal of capacitor C2 is connected with the output of mu balanced circuit, is connected in parallel on the two ends of capacitor C2 after described resistance R 4 and light emitting diode D2 are in series again.
4. electric blanket temperature controller according to claim 1, it is characterized in that: also comprise working state indicating circuit, this working state indicating circuit comprises resistance R 5 and light emitting diode D3, one end of resistance R 5 is connected on the output of the second hysteresis comparator, the other end is connected with one end of light emitting diode D3, and the other end of light emitting diode D3 is connected on the negative pole of voltage.
5. electric blanket temperature controller according to claim 1, is characterized in that: between the positive pole of described power supply and the drain D of metal-oxide-semiconductor, be connected with fuse current foldback circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410205210.4A CN103984377B (en) | 2014-05-15 | 2014-05-15 | Electric blanket temperature controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410205210.4A CN103984377B (en) | 2014-05-15 | 2014-05-15 | Electric blanket temperature controller |
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| CN103984377A CN103984377A (en) | 2014-08-13 |
| CN103984377B true CN103984377B (en) | 2016-05-25 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017113065A1 (en) * | 2015-12-28 | 2017-07-06 | 深圳市聚作照明股份有限公司 | Automatic charging circuit and emergency lamp |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201845245U (en) * | 2010-08-04 | 2011-05-25 | 中国电力科学研究院 | Temperature control device based on smart electricity meter device |
| CN202067162U (en) * | 2011-04-28 | 2011-12-07 | 刘家发 | Temperature control timer made from time base circuit |
| CN102419606A (en) * | 2011-12-17 | 2012-04-18 | 朱虹 | Temperature-adjustable electric blanket controller |
| CN202477150U (en) * | 2012-03-12 | 2012-10-10 | 孙建忠 | Constant temperature electric blanket |
| CN203838579U (en) * | 2014-05-15 | 2014-09-17 | 常州机电职业技术学院 | Electric blanket temperature controller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6432321A (en) * | 1987-07-29 | 1989-02-02 | Toshiba Corp | Electronic heater |
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- 2014-05-15 CN CN201410205210.4A patent/CN103984377B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201845245U (en) * | 2010-08-04 | 2011-05-25 | 中国电力科学研究院 | Temperature control device based on smart electricity meter device |
| CN202067162U (en) * | 2011-04-28 | 2011-12-07 | 刘家发 | Temperature control timer made from time base circuit |
| CN102419606A (en) * | 2011-12-17 | 2012-04-18 | 朱虹 | Temperature-adjustable electric blanket controller |
| CN202477150U (en) * | 2012-03-12 | 2012-10-10 | 孙建忠 | Constant temperature electric blanket |
| CN203838579U (en) * | 2014-05-15 | 2014-09-17 | 常州机电职业技术学院 | Electric blanket temperature controller |
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| CN103984377A (en) | 2014-08-13 |
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