CN101431840B - Temperature signal collection circuit of quasi-resonance electromagnetic water heater - Google Patents
Temperature signal collection circuit of quasi-resonance electromagnetic water heater Download PDFInfo
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- CN101431840B CN101431840B CN2008102308810A CN200810230881A CN101431840B CN 101431840 B CN101431840 B CN 101431840B CN 2008102308810 A CN2008102308810 A CN 2008102308810A CN 200810230881 A CN200810230881 A CN 200810230881A CN 101431840 B CN101431840 B CN 101431840B
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- photoelectrical coupler
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- temperature sensor
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Abstract
The present invention provides a temperature signal acquisition circuit in quasi-resonant electromagnetic heater, wherein the connection relationship is as following: one end of temperature sensor is connected to triode collector of photo coupler U2, the other end of temperature sensor connected to DC low voltage power supply; resistance R47 is connected in parallel to two ends of temperature sensor; triode emitter of photo coupler U2 is connected to ground after connection with resistance R38 and capacitance C32 separately; diode cathode of photo coupler U2 is connected to ground after connection with R42; DC low voltage power supply connected to ground after connection with resistance R46, adjustable resistance RV2, resistance R45 in series; diode anode of pot coupler U2 is connected between resistance R46 and adjustable resistance RV2; diode anode of photo coupler U2 is taken as input end SR after connection with resistance R48, triode emitter of photo coupler U2 is taken as output end SC; The structure and principle of temperature signal collection circuit is simple with strong practicality, safety and reliability and stable operation.
Description
Technical field
The present invention relates to a kind of signal acquisition circuit, specifically, relate to a kind of temperature signal collection circuit of quasi-resonance electromagnetic water heater.
Background technology
Electric heater of the prior art, method of its control temperature constant generally are to adopt stepping to regulate, and cooperate the current and the size of basic water temperature to operate, promptly with manually method find oneself desirable water temperature point; Because the shakiness of hydraulic pressure, voltage, easily influence the water temperature point, and then influence the mood of individual character water, brought frequent operation thereupon, this the dangerous electric spark or electric spark that will bring contact switch to cause disturbs, and the probability that contact switch is damaged under wet environment improves greatly.
Quasi-resonance electromagnet water heater is a kind of water heater that utilizes electromagnetic induction heating for principle, and during work, the logical high-frequency current of acting solenoid producing powerful high frequency magnetic field, and then makes the METAL HEATING PROCESS body produce powerful eddy current and heating acting under the choked flow effect; For guaranteeing the constant and accurate of electric heater leaving water temperature, make water heater just very high to the requirement of automatic control, especially the signals collecting of temperature signal collection circuit is extremely important to ensureing desirable electric heater leaving water temperature.
In order to overcome the above problems, people are seeking a kind of desirable technical solution always.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, thereby a kind of temperature signal collection circuit of quasi-resonance electromagnetic water heater of practical, safe and reliable, working stability is provided.
The objective of the invention is to realize by following technical scheme:
A kind of temperature signal collection circuit of quasi-resonance electromagnetic water heater, this circuit comprises photoelectrical coupler U2, temperature sensor and Dc low voltage power supply, the transistor collector of described photoelectrical coupler U2 connects an end of described temperature sensor, the other end of described temperature sensor connects Dc low voltage power supply, described Dc low voltage power supply connects the transistor emitter of described photoelectrical coupler U2 by capacitor C 31, described temperature sensor two ends parallel resistance R47, the transistor emitter of described photoelectrical coupler U2 connects resistance R 38 respectively, capacitor C 32 back ground connection, the diode cathode of described photoelectrical coupler U2 connects resistance R 42 back ground connection, described Dc low voltage power supply connects resistance R 46 successively, adjustable resistance RV2, resistance R 45 back ground connection, the diode cathode of described photoelectrical coupler U2 is connected resistance R 46, between the adjustable resistance RV2, the diode cathode of described photoelectrical coupler U2 connects capacitor C 23 respectively, capacitor C 27 back ground connection, the diode cathode of described photoelectrical coupler U2 connects resistance R 48 backs as signal input end SR, and the transistor emitter of described photoelectrical coupler U2 is as control signal output ends SC.
The present invention has outstanding substantive distinguishing features and obvious improvement with respect to prior art, specifically, this circuit is according to the variation of temperature sensor measured temperature, and intelligence control circuit is exported in this variation by photoelectrical coupler, and then realizing the purpose of intelligence control circuit regulation and control acting circuit, its structure, principle are simple, practical, safe and reliable, working stability.
This circuit has constant temperature, manually sets warm area control, and electric heater applied temps point is provided with arbitrarily, and maneuverability is the highest, the ideal control mode of intelligent degree in current all electric heaters;
This circuit is to realize the smart circuit that automatic power regulation designs for electric heater, and it is in the fluctuation range of certain hydraulic pressure, current, and leaving water temperature is not subjected to the influence of hydraulic pressure, current, basic water temperature basically, and temperature is locked in the ideal region.
Description of drawings
Fig. 1 is a circuit theory synoptic diagram of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
As shown in Figure 1, a kind of temperature signal collection circuit of quasi-resonance electromagnetic water heater, this circuit comprises photoelectrical coupler U2, temperature sensor and Dc low voltage power supply+5V, the transistor collector of described photoelectrical coupler U2 connects an end of described temperature sensor, the other end of described temperature sensor connects Dc low voltage power supply+5V, described Dc low voltage power supply+5V connects the transistor emitter of described photoelectrical coupler U2 by capacitor C 31, described temperature sensor two ends parallel resistance R47, the transistor emitter of described photoelectrical coupler U2 connects resistance R 38 respectively, capacitor C 32 back ground connection, the diode cathode of described photoelectrical coupler U2 connects resistance R 42 back ground connection, described Dc low voltage power supply+5V connects resistance R 46 successively, adjustable resistance RV2, resistance R 45 back ground connection, the diode cathode of described photoelectrical coupler U2 is connected resistance R 46, between the adjustable resistance RV2, the diode cathode of described photoelectrical coupler U2 connects capacitor C 23 respectively, capacitor C 27 back ground connection, the diode cathode of described photoelectrical coupler U2 connects resistance R 48 backs as signal input end SR, and the transistor emitter of described photoelectrical coupler U2 is as control signal output ends SC;
CN2 contact grafting temperature sensor; Described photoelectrical coupler U2 model is P521.
Photoelectrical coupler transistor collector and temperature sensor are in series, and increase the additional electrical resistance of temperature sensor, the control of realization different temperature points according to different temperature spots;
Temperature sensor and photoelectric coupler output end are gone here and there the back mutually and are formed dividing points with resistance R 38, make the voltage of dividing point varied with temperature by temperature sensor to present the control of resistance value and optocoupler output equivalent resistance;
Temperature sensor is outer and the attached resistance R 47 that helps, the error of regulating temperature sensor according to the size of resistance R 47 arranged; Compensate the error of optocoupler equivalent resistance by adjustable resistance RV2;
The electric heater intelligence control circuit sends pulse signal, process resistance R 48 and capacitor C 27, C23 filtering add photoelectrical coupler input end, the i.e. positive terminal of diode with the DC voltage form, resistance R 42 is current-limiting resistances, is used for improving the input linearity of electronic original part diode;
Resistance R 46, R45, RV2 set up dividing point, help the adding of described pulse signal direct current; The some moderate amount of the rectification direct current signal input of described pulse signal is finely tuned by adjustable resistance RV2, to reach accurate control input current value;
Photoelectrical coupler P521 input end diode is under described pulse signal direct current control, send different light according to the size of electric current and inject phototriode, phototriode is by controlled, phototriode collector then, dynamic resistance value between the emitter changes, the contact voltage that makes temperature sensor and resistance R 38 is in continuous variation, just export the voltage signal of different value at the phototriode emitter, and input intelligence control circuit, after handling by intelligence control circuit, export the pulse signal that different numerical value change thereupon again, to reach the purpose that power is adjusted from motion tracking.
Of particular note: this circuit can be used in any electromagnetic heater or the equipment.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (1)
1. temperature signal collection circuit of quasi-resonance electromagnetic water heater, it is characterized in that: this circuit comprises photoelectrical coupler U2, temperature sensor and Dc low voltage power supply, the transistor collector of described photoelectrical coupler U2 connects an end of described temperature sensor, the other end of described temperature sensor connects Dc low voltage power supply, described Dc low voltage power supply connects the transistor emitter of described photoelectrical coupler U2 by capacitor C 31, described temperature sensor two ends parallel resistance R47, the transistor emitter of described photoelectrical coupler U2 connects resistance R 38 respectively, capacitor C 32 back ground connection, the diode cathode of described photoelectrical coupler U2 connects resistance R 42 back ground connection, described Dc low voltage power supply connects the resistance R 46 that is serially connected successively, adjustable resistance RV2, resistance R 45 back ground connection, the diode cathode of described photoelectrical coupler U2 is connected resistance R 46, between the adjustable resistance RV2, the diode cathode of described photoelectrical coupler U2 connects capacitor C 23 respectively, capacitor C 27 back ground connection, the diode cathode of described photoelectrical coupler U2 connects resistance R 48 backs as signal input end SR, and the transistor emitter of described photoelectrical coupler U2 is as control signal output ends SC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102308810A CN101431840B (en) | 2008-11-14 | 2008-11-14 | Temperature signal collection circuit of quasi-resonance electromagnetic water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102308810A CN101431840B (en) | 2008-11-14 | 2008-11-14 | Temperature signal collection circuit of quasi-resonance electromagnetic water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101431840A CN101431840A (en) | 2009-05-13 |
| CN101431840B true CN101431840B (en) | 2011-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102308810A Expired - Fee Related CN101431840B (en) | 2008-11-14 | 2008-11-14 | Temperature signal collection circuit of quasi-resonance electromagnetic water heater |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006714B (en) * | 2016-10-28 | 2020-06-30 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic oven and heat preservation control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0709757B1 (en) * | 1994-10-25 | 2000-08-23 | Siemens Building Technologies AG | Method and apparatus for operating a heat exchanger |
| CN1836467A (en) * | 2003-07-02 | 2006-09-20 | 瓦列里·卡甘 | Heating systems and methods |
| CN201298938Y (en) * | 2008-11-14 | 2009-08-26 | 张军才 | Temperature signal capturing circuit of quasi-resonance electromagnet water heater |
-
2008
- 2008-11-14 CN CN2008102308810A patent/CN101431840B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0709757B1 (en) * | 1994-10-25 | 2000-08-23 | Siemens Building Technologies AG | Method and apparatus for operating a heat exchanger |
| CN1836467A (en) * | 2003-07-02 | 2006-09-20 | 瓦列里·卡甘 | Heating systems and methods |
| CN201298938Y (en) * | 2008-11-14 | 2009-08-26 | 张军才 | Temperature signal capturing circuit of quasi-resonance electromagnet water heater |
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| Publication number | Publication date |
|---|---|
| CN101431840A (en) | 2009-05-13 |
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Granted publication date: 20110323 Termination date: 20131114 |