CN203838579U - Electric blanket temperature controller - Google Patents
Electric blanket temperature controller Download PDFInfo
- Publication number
- CN203838579U CN203838579U CN201420248972.8U CN201420248972U CN203838579U CN 203838579 U CN203838579 U CN 203838579U CN 201420248972 U CN201420248972 U CN 201420248972U CN 203838579 U CN203838579 U CN 203838579U
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- Prior art keywords
- hysteresis comparator
- circuit
- power supply
- electric blanket
- reference voltage
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Abstract
The utility model discloses an electric blanket temperature controller, which comprises a voltage stabilizing circuit, a reference voltage generating circuit, an MOS (metal oxide semiconductor) tube, a first hysteresis comparator, a second hysteresis comparator, and a temperature-adjusting and temperature-measuring voltage formation circuit. The input end of the voltage stabilizing circuit is connected with the positive pole of a power supply. The positive terminals of the reference voltage generating circuit, the temperature-adjusting and temperature-measuring voltage formation circuit, the first hysteresis comparator and the second hysteresis comparator are respectively connected with the output end of the voltage stabilizing circuit. The grounding end of the voltage stabilizing circuit, and the negative terminals of the reference voltage generating circuit, the temperature-adjusting and temperature-measuring voltage formation circuit, the first hysteresis comparator and the second hysteresis comparator are respectively connected with the negative pole of the power supply. The drain electrode D of the MOS tube is connected with the positive pole of the power supply. The source electrode S of the MOS tube is connected with an electric blanket firstly and then is connected with the negative pole of the power supply. The working voltage input end of the first hysteresis comparator and the working voltage input end of the second hysteresis comparator are respectively connected with the output end of the voltage stabilizing circuit. According to the technical scheme of the utility model, the temperature presetting and adjusting function is realized, and the response speed is accelerated. Meanwhile, the electric blanket temperature controller is simple and convenient to operate.
Description
Technical field
The utility model 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, in temperature adjusting and secure context, there is certain hidden danger, especially for the elderly and infant, problem is more outstanding, the security of using for improving electric blanket, Some Enterprises has been studied and has been adopted carbon fiber as the low-voltage electrical heating blanket of exothermic material at present, this temperature controller is the special-purpose 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, with potentiometer, carry out preset temperature and adjusting, to meet the operational requirements of special population.
Summary of the invention
Technical problem to be solved in the utility model 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, the technical solution of the utility model 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 end 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 terminal 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 end of the first hysteresis comparator is connected with the output terminal of mu balanced circuit respectively with the operating voltage input end 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 end of the second described hysteresis comparator is connected with the output terminal of the first hysteresis comparator, the output terminal 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, stabilivolt and capacitor C3, resistance R 3 and capacitor C3 are in series, stabilivolt 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 terminal 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 terminal 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 guarantee 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.
Adopted 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, improved 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, when 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, when 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.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of electric blanket temperature controller of the present utility model.
Embodiment
For content of the present utility model is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail 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 end 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 terminal 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 end of the operating voltage input end of the first hysteresis comparator 1 and the second hysteresis comparator 2 is connected with the output terminal 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 end of the second hysteresis comparator 2 is connected with the output terminal of the first hysteresis comparator 1, the output terminal of the second hysteresis comparator 2 is connected with the grid G of metal-oxide-semiconductor Q1.Because metal-oxide-semiconductor Q1 in this circuit selects conducting resistance, be the device of 6 milliohms, during 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, stabilivolt D1 and capacitor C3, resistance R 3 and capacitor C3 are in series, and stabilivolt 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 terminal 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 terminal 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 guarantee 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.
Principle of work of the present utility model 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, improved 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, when 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, when 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 matters, technical scheme and beneficial effect that the utility model is solved further describe; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
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 end 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 terminal 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 end of the first hysteresis comparator is connected with the output terminal of mu balanced circuit respectively with the operating voltage input end 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 end of the second described hysteresis comparator is connected with the output terminal of the first hysteresis comparator, the output terminal of the second hysteresis comparator is connected with the grid G of 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, stabilivolt and capacitor C3, resistance R 3 and capacitor C3 are in series, stabilivolt 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 terminal 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 terminal 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 |
|---|---|---|---|
| CN201420248972.8U CN203838579U (en) | 2014-05-15 | 2014-05-15 | Electric blanket temperature controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420248972.8U CN203838579U (en) | 2014-05-15 | 2014-05-15 | Electric blanket temperature controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203838579U true CN203838579U (en) | 2014-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420248972.8U Expired - Fee Related CN203838579U (en) | 2014-05-15 | 2014-05-15 | Electric blanket temperature controller |
Country Status (1)
| Country | Link |
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| CN (1) | CN203838579U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103984377A (en) * | 2014-05-15 | 2014-08-13 | 常州机电职业技术学院 | Electric blanket temperature controller |
| CN105404332A (en) * | 2015-12-21 | 2016-03-16 | 周芸 | Electric heating feet warming blanket with presettable temperature |
-
2014
- 2014-05-15 CN CN201420248972.8U patent/CN203838579U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103984377A (en) * | 2014-05-15 | 2014-08-13 | 常州机电职业技术学院 | Electric blanket temperature controller |
| CN103984377B (en) * | 2014-05-15 | 2016-05-25 | 常州机电职业技术学院 | Electric blanket temperature controller |
| CN105404332A (en) * | 2015-12-21 | 2016-03-16 | 周芸 | Electric heating feet warming blanket with presettable temperature |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20200515 |