CN104348378A - Temperature adjusting circuit for electric appliances - Google Patents
Temperature adjusting circuit for electric appliances Download PDFInfo
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- CN104348378A CN104348378A CN201310316892.1A CN201310316892A CN104348378A CN 104348378 A CN104348378 A CN 104348378A CN 201310316892 A CN201310316892 A CN 201310316892A CN 104348378 A CN104348378 A CN 104348378A
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Abstract
The invention relates to a temperature adjusting circuit for electric appliances. The temperature adjusting circuit comprises a power source circuit used for realizing voltage reduction and rectification of an alternating current, a zero-crossing detection circuit which is used for generating a pulse DC voltage and carrying out zero-crossing detection on the pulse DC voltage and is connected with an output end of the power source circuit, and a power adjusting circuit which is electrically connected with an output end of the zero-crossing detection circuit, wherein the power adjusting circuit outputs high-level trigger pulses to control a load power after carrying out counting and pulse distribution of zero-crossing pulses outputted by the zero-crossing detection circuit. The temperature adjusting circuit has advantages of simple structure and convenient use.
Description
Technical field
The present invention relates to a kind of temperature adjustment circuit of electrical equipment.
Background technology
Current electric heater monofilament stepless temperature-regulating circuit on the market, adopt a heating wire as the load of thyristor regulating depressor, its power can regulate in the scope of several kilowatts at tens watts.But this electric furnace is when heating little cooker, around hollow joint is large, heat radiation is large, power consumption is also large.For heating little cooker, not only an electric rangette is bought in electricity consumer increasing of having to, uneconomical but also account for kitchen range top area.
Summary of the invention
For above-mentioned technical problem, main purpose of the present invention is, the temperature adjustment circuit of the electrical equipment providing a kind of structure simple and easy to use.
The temperature adjustment circuit of electrical equipment, comprises power circuit alternating current being carried out step-down and rectification; And
Produce pulsating dc voltage and this pulsating dc voltage carried out to the zero cross detection circuit of zero passage detection, zero cross detection circuit is connected to the output of power circuit; And
Be electrically connected on the power conditioning circuitry of zero cross detection circuit output, this power conditioning circuitry counts the zero-crossing pulse that zero cross detection circuit exports and after pulse distribution, exports high trigger pulses with the control to bearing power.
Described power circuit comprise transformer, the first diode, transformer two ends connect the anode tap of the first diode and the second diode respectively, the cathode terminal of the first diode is connected with the cathode terminal of the second diode.
Described power circuit also comprises a filter capacitor, and one end of this filter capacitor is connected with the cathode terminal of the first diode, the other end ground connection of filter capacitor.
Zero cross detection circuit comprises the 3rd diode, the 4th diode, the first resistance and operational amplifier, the anode tap of the 3rd diode is all connected with power circuit with the anode tap of the 4th diode, the cathode terminal of the 3rd diode is connected with the cathode terminal of the 4th diode, one end of first resistance is connected with the cathode terminal of the 3rd diode, and the other end of the first resistance is connected with the input of operational amplifier.
Described power conditioning circuitry comprises counting/distribution integrated circuit, power regulating switch, 5th diode, 6th diode, second resistance, 3rd resistance, triode and thyristor, the input of counting/distribution integrated circuit connects power regulating switch, counting/distribution integrated circuit connects the anode tap of the 5th diode and the 6th diode respectively, , the cathode terminal of the 5th diode is connected with the cathode terminal of the 6th diode, one end of second resistance is connected with the cathode terminal of the 5th diode, the other end of the second resistance is connected with the base stage of triode, the collector electrode of triode connects power circuit by the 3rd resistance, the emitter of triode connects the trigger end of thyristor, the other two ends of thyristor are output.
Have employed such scheme, by power circuit, alternating current is carried out step-down and rectification, the low-voltage DC of generation is supplied to zero cross detection circuit and power conditioning circuitry uses.Produce pulsating dc voltage by zero cross detection circuit and zero passage detection is carried out to this pulsating dc voltage, when pulsating dc voltage zero passage, by power conditioning circuitry the zero-crossing pulse that zero cross detection circuit exports counted and after pulse distribution, export high trigger pulses with the control to bearing power.Temperature adjustment circuit of the present invention has structure advantage simple and easy to use.
Accompanying drawing explanation
Fig. 1 is circuit block diagram of the present invention;
Fig. 2 is electric structure structure chart of the present invention;
Embodiment
With reference to Fig. 1, the temperature adjustment circuit of a kind of electrical equipment of the present invention, comprises power circuit alternating current being carried out step-down and rectification; And produce pulsating dc voltage and this pulsating dc voltage carried out to the zero cross detection circuit of zero passage detection, zero cross detection circuit is connected to the output of power circuit; And being electrically connected on the power conditioning circuitry of zero cross detection circuit output, this power conditioning circuitry counts the zero-crossing pulse that zero cross detection circuit exports and after pulse distribution, exports high trigger pulses with the control to bearing power.
With reference to Fig. 2, the anode tap that described power circuit comprises transformer T, the first diode VD1, the two ends of transformer T connect the first diode VD1 and the second diode VD2 respectively, the cathode terminal of the first diode VD1 is connected with the cathode terminal of the second diode VD2.Described power circuit also comprises a filter capacitor C, and one end of this filter capacitor is connected with the cathode terminal of the first diode, the other end ground connection of filter capacitor.
With reference to Fig. 2, zero cross detection circuit comprises the 3rd diode VD3, the 4th diode VD4, the first resistance R1 and operational amplifier, the anode tap of the 3rd diode VD3 is all connected with power circuit with the anode tap of the 4th diode VD4, the cathode terminal of the 3rd diode VD3 is connected with the cathode terminal of the 4th diode VD4, one end of first resistance R1 is connected with the cathode terminal of the 3rd diode VD3, and the other end of the first resistance R1 is connected with the input of operational amplifier.
With reference to Fig. 2, described power conditioning circuitry comprises counting/distribution integrated circuit (IC) 2, power regulating switch S, 5th diode VD5, 6th diode VD6, second resistance R2, 3rd resistance R3, triode Q1 and thyristor Q2, the input of counting/distribution integrated circuit (IC) 2 connects power regulating switch S, counting/distribution integrated circuit (IC) 2 connects the anode tap of the 5th diode VD5 and the 6th diode VD6 respectively, , the cathode terminal of the 5th diode VD5 is connected with the cathode terminal of the 6th diode VD6, one end of second resistance R2 is connected with the cathode terminal of the 5th diode VD5, the other end of the second resistance R2 is connected with the base stage of triode Q1, the collector electrode of triode Q1 connects power circuit by the 3rd resistance R3, the emitter of triode Q1 connects the trigger end of thyristor Q2, the other two ends of thyristor Q2 are output.
The course of work of the present invention is as follows:
Alternating voltage, after transformer pressure-reducing, the first diode VD1 and the second diode VD2 rectification and filter capacitor C filtering, produces the direct voltage of 9V, supply integrated operational amplifier IC1 and counting/distribution integrated circuit (IC) 2 and triode Q1.Produce pulsating dc voltage after the voltage commutation that transformer T exports by the 3rd diode VD3 and the 4th diode VD4, this pulsating dc voltage adds to the inverting input of integrated operational amplifier IC1 after the first resistance R1.When pulsating voltage zero passage, integrated operational amplifier IC1 cheaply exports pulse.The zero-crossing pulse that counting/the distribute integrated circuit (IC) 2 couples of integrated operational amplifier IC1 export counts and after pulse distribution, exports high trigger pulses, and the angle of flow controlling thyristor by triode Q1 realizes the control to bearing power.Power regulating switch S is 4 position switch, and it is used for changing the counting mode counting/distribute integrated circuit (IC) 2.
Claims (5)
1. the temperature adjustment circuit of electrical equipment, is characterized in that, comprises power circuit alternating current being carried out step-down and rectification; And
Produce pulsating dc voltage and this pulsating dc voltage carried out to the zero cross detection circuit of zero passage detection, zero cross detection circuit is connected to the output of power circuit; And
Be electrically connected on the power conditioning circuitry of zero cross detection circuit output, this power conditioning circuitry counts the zero-crossing pulse that zero cross detection circuit exports and after pulse distribution, exports high trigger pulses with the control to bearing power.
2. the temperature adjustment circuit of electrical equipment according to claim 1, it is characterized in that: described power circuit comprise transformer (T), the first diode (VD1), transformer (T) two ends connect the anode tap of the first diode (VD1) and the second diode (VD2) respectively, the cathode terminal of the first diode (VD1) is connected with the cathode terminal of the second diode (VD2).
3. the temperature adjustment circuit of electrical equipment according to claim 2, is characterized in that: described power circuit also comprises a filter capacitor (C), and one end of this filter capacitor is connected with the cathode terminal of the first diode, the other end ground connection of filter capacitor.
4. the temperature adjustment circuit of electrical equipment according to claim 1, it is characterized in that: zero cross detection circuit comprises the 3rd diode (VD3), 4th diode (VD4), first resistance (R1) and operational amplifier, the anode tap of the 3rd diode (VD3) is all connected with power circuit with the anode tap of the 4th diode (VD4), the cathode terminal of the 3rd diode (VD3) is connected with the cathode terminal of the 4th diode (VD4), one end of first resistance (R1) is connected with the cathode terminal of the 3rd diode (VD3), the other end of the first resistance (R1) is connected with the input of operational amplifier.
5. the temperature adjustment circuit of electrical equipment according to claim 1, it is characterized in that: described power conditioning circuitry comprises counting/distribution integrated circuit (IC2), power regulating switch (S), 5th diode (VD5), 6th diode (VD6), second resistance (R2), 3rd resistance (R3), triode (Q1) and thyristor (Q2), the input of counting/distribution integrated circuit (IC2) connects power regulating switch (S), counting/distribution integrated circuit (IC2) connects the anode tap of the 5th diode (VD5) and the 6th diode (VD6) respectively, , the cathode terminal of the 5th diode (VD5) is connected with the cathode terminal of the 6th diode (VD6), one end of second resistance (R2) is connected with the cathode terminal of the 5th diode (VD5), the other end of the second resistance (R2) is connected with the base stage of triode (Q1), the collector electrode of triode (Q1) connects power circuit by the 3rd resistance (R3), the emitter of triode (Q1) connects the trigger end of thyristor (Q2), the other two ends of thyristor (Q2) are output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310316892.1A CN104348378A (en) | 2013-07-25 | 2013-07-25 | Temperature adjusting circuit for electric appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310316892.1A CN104348378A (en) | 2013-07-25 | 2013-07-25 | Temperature adjusting circuit for electric appliances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104348378A true CN104348378A (en) | 2015-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310316892.1A Pending CN104348378A (en) | 2013-07-25 | 2013-07-25 | Temperature adjusting circuit for electric appliances |
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| Country | Link |
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| CN (1) | CN104348378A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106559923A (en) * | 2016-11-04 | 2017-04-05 | 广西大学 | A kind of power conditioning circuitry of many gear electric heaters |
-
2013
- 2013-07-25 CN CN201310316892.1A patent/CN104348378A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106559923A (en) * | 2016-11-04 | 2017-04-05 | 广西大学 | A kind of power conditioning circuitry of many gear electric heaters |
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| C06 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150211 |