CN103411010B - A kind of gas ratio valve PWM drive circuit - Google Patents
A kind of gas ratio valve PWM drive circuit Download PDFInfo
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- CN103411010B CN103411010B CN201310304252.9A CN201310304252A CN103411010B CN 103411010 B CN103411010 B CN 103411010B CN 201310304252 A CN201310304252 A CN 201310304252A CN 103411010 B CN103411010 B CN 103411010B
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Abstract
A kind of gas ratio valve PWM drive circuit, it can be widely used in the field such as gas water-heater, gas-fired water heating boiler.This circuit comprises the pwm signal change-over circuit be made up of operational amplifier IC circuit U 1 and peripheral circuit, and operational amplifier IC circuit U 2 and peripheral circuit composition follow feeder loop, the valve-driving circuit of triode Q1, Q2 and peripheral circuit composition thereof.During circuit working, pwm signal converts corresponding analog voltage to through operational amplifier IC circuit U 1 and peripheral circuit, input to operational amplifier IC circuit U 2 and peripheral circuit composition follow feeder loop, to follow in feeder loop this voltage through with Proportional valve feedback sample voltage compare after export suitable aperture voltage, the drive circuit of this aperture Control of Voltage triode Q1, Q2 and peripheral circuit composition thereof, comparative example valve drives.Because this drive circuit adopts hardware controls completely, motion speed is fast, and control accuracy is high, comparative example valve controls steadily, the phenomenons such as complete non-jitter, and pliotron Q2 internal power consumption is extremely low, very important means when being gas water-heater, gas-fired water heating boiler thermostatically control.
Description
Technical field
The present invention relates to a kind of gas ratio valve PWM drive circuit, especially a kind of Proportional valve drive circuit being applied to gas water-heater, gas-fired water heating boiler and some high-end thermostatic control technology products.
Background technique
Currently available technology, at the product such as gas water-heater, gas heating boiler, especially in its high-end automatic constant-temperature control type product, uses gas ratio valve general already.This series products regulates Gas Load and the thermostatically control of health hot water and heating water have employed relevant automatic control technology, and control mode is varied, as PID control, fuzzy control, Self-learning control etc.In this kind of thermostatic control technology, all can't do without the controlling unit using Proportional valve as actuator, and the drived control of comparative example valve is also all almost pwm pattern.Therefore the drived control of Proportional valve is also unusual the key link in whole system control technique.
In the products such as existing automatic constant-temperature control type gas water-heater, gas heating boiler, the PWM of comparative example valve drives what mostly adopt to be more easy switching mode control mode, its hardware circuit is fairly simple, and nearly all just the complete on off state with pwm signal next direct control ratio valve driving triode realizes the modulation of comparative example valve operating voltage.This PWM controls mostly to rely on software to realize completely, and the monitoring of comparative example threshold voltage is also undertaken carrying out correcting process to pwm signal after calculating is compared in reverse feedback by software again after comparative example threshold voltage carries out AD sampling.But, in the thermostatically control algorithm of system, and even be often subject to again coming from the differential of temperature difference temperature variation, the output action impact of integration scheduling algorithm result on the correction adjustment of pwm signal, thus the PWM regulable control of comparative example valve not only process complexity, and control rate and control accuracy are all had a greatly reduced quality.Optimal way relies on one independently to run module to implement the driving of comparative example valve after system pwm signal is outputted to Proportional valve drive circuit, this module directly can complete separately comparative example valve and drive, and by its independently degeneration factor realize quick Self-tuning System, to ensure that Proportional valve carries out its operating voltage adjustment with target P WM signal fast, accurately, stably.
Summary of the invention
The object of the invention is: be to solve the difficult problem generally run into when carrying out thermostatically control design in the products such as automatic constant-temperature control type gas water-heater, gas heating boiler, there is provided one can the Proportional valve drive control module of independent operating, comparative example valve can realize accurately Self-tuning System and control fast, to reduce the complexity of thermostatically control software algorithm, and improve a kind of gas ratio valve PWM drive circuit of system thermostatically control precision and speed.
The present invention is achieved in that a kind of gas ratio valve PWM drive circuit, it comprises the pwm signal change-over circuit be made up of the first operational amplifier IC circuit and peripheral circuit, second operational amplifier IC circuit and peripheral circuit composition follow feeder loop, three parts such as the valve-driving circuit of the first triode, the second triode and peripheral circuit thereof composition;
Pwm signal change-over circuit with follow feeder loop and be connected, follow feeder loop and be connected with valve-driving circuit.
Described a kind of gas ratio valve PWM drive circuit, its special way is: described pwm signal change-over circuit is made up of the first operational amplifier IC circuit U 1 and peripheral circuit first resistance R1, the second resistance R2, the 3rd resistance R3, the first electric capacity C1, the second electric capacity C2; First resistance R1 one end is as pwm signal input interface, the other end is then connected in parallel the common mode inlet opening of rear access first operational amplifier IC circuit U 1 with the first electric capacity C1 positive pole, the second resistance R2, the first electric capacity C1 negative pole, the second resistance R2 the other end are all connected with circuitry ground; The difference-mode input mouth of the first operational amplifier IC circuit U 1 is then directly connected with its output terminal, then connects with the 3rd resistance R3 through output terminal; The common mode inlet opening of the 3rd resistance R3 the other end and the second electric capacity C2 positive pole and the second operational amplifier IC circuit U 2 is in parallel, and the second electric capacity C2 negative pole is connected with circuitry ground;
Described feeder loop of following is made up of the second operational amplifier IC circuit U 2 and peripheral circuit the 4th resistance R4, the 8th resistance R8, the 9th resistance R9, the 3rd electric capacity C3; The common mode inlet opening of the second operational amplifier IC circuit U 2 and the output terminal of described pwm signal change-over circuit are also the 3rd resistance R3, the points of common connection of the second electric capacity C2 is connected, and its difference-mode input mouth is then connected with the points of common connection of the 4th resistance R4, the 3rd electric capacity C3, the 8th resistance R8; 4th resistance R4 the other end welding system power vd D positive pole, another pole connection circuit of 3rd electric capacity C3 systematically, the 8th resistance R8 the other end is connected with the 9th resistance R9 of feedback sample resistance and the negative pole interface of Proportional valve, and the 9th resistance R9 the other end put in circuit systematically; The output terminal of the second operational amplifier IC circuit U 2 is connected with base resistance the 5th resistance R5 of the first triode Q1 in valve-driving circuit;
Described electrohydraulic valve actuator route first, second triode Q1, Q2 and peripheral circuit the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the first diode D1 form, one end of base resistance the 5th resistance R5 of the first triode Q1 is connected with the output terminal of the second operational amplifier IC circuit U 2 of following in feeder loop, and the other end of the 5th resistance R5 is connected with the base stage of the first triode Q1; The emitter of the first triode Q1 is directly connected with circuitry ground, its collector electrode is connected with base resistance the 6th resistance R6 of pliotron second triode Q2, base stage and pull-up resistor the 7th resistance R7 of the 6th resistance R6 the other end and the second triode Q2 are connected, the other end of the 7th resistance R7 and the emitter access Proportional valve working power VCC positive pole of the second triode Q2; The collector electrode of the second triode Q2 is connected with the anode interface of Proportional valve, first diode D1 is as the reversal protection diode of Proportional valve, it is together with Proportional valve reverse parallel connection, and its negative pole is connected with the anode interface of Proportional valve, and positive pole is then connected with the negative pole interface of Proportional valve; The negative pole interface of Proportional valve is with the 8th resistance R8 followed in feeder loop and feedback sample resistance the 9th resistance R9 phase and connect;
In described circuit, the negative pole of system power supply VDD, Proportional valve working power VCC is all connected with circuitry ground; Namely under in first, second circuit described, operational amplifier IC circuit is all operated in system power supply VDD, be also connected with system power supply VDD positive pole described in its positive source, described in power cathode with circuitry be connected.
Described a kind of gas ratio valve PWM drive circuit, its special way is: the first triode Q1 is NPN type pipe, and the second triode Q2 is positive-negative-positive.
Described a kind of gas ratio valve PWM drive circuit, its special way is: the resistance of the first resistance R1 is less than the resistance of the second resistance R2.
A kind of gas ratio valve PWM drive circuit, during circuit working, pwm signal converts corresponding analog voltage to through operational amplifier IC circuit U 1 and peripheral circuit, input to operational amplifier IC circuit U 2 and peripheral circuit composition follow feeder loop, to follow in feeder loop this voltage through with Proportional valve feedback sample voltage compare after export suitable aperture voltage, the drive circuit of this aperture Control of Voltage triode Q1, Q2 and peripheral circuit composition thereof, comparative example valve drives.Because this drive circuit adopts hardware controls completely, motion speed is fast, control accuracy is high, comparative example valve controls steadily, the phenomenons such as complete non-jitter, and pliotron Q2 internal power consumption is extremely low, very important means when being therefore thermostatically control in the product such as gas water-heater, gas-fired water heating boiler.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, a kind of gas ratio valve PWM drive circuit, it mainly comprises the pwm signal change-over circuit of the first calculation amplifier IC circuit U 1 and peripheral circuit composition, second operational amplifier IC circuit U 2 and peripheral circuit composition follow feeder loop, three parts such as the valve-driving circuit of first, second triode Q1, Q2 and peripheral circuit composition thereof.
As shown in Figure 1, described pwm signal change-over circuit is made up of the first operational amplifier IC circuit U 1 and peripheral circuit first resistance R1, the second resistance R2, the 3rd resistance R3, the first electric capacity C1, the second electric capacity C2.First resistance R1 one end is as pwm signal input interface, the other end is then connected in parallel the common mode inlet opening of rear access first operational amplifier IC circuit U 1 with the first electric capacity C1 positive pole, the second resistance R2, the first electric capacity C1 negative pole, the second resistance R2 the other end are all connected with circuitry ground.The difference-mode input mouth of the first operational amplifier IC circuit U 1 is then directly connected with its output terminal, then connects with the 3rd resistance R3 through output terminal.The common mode inlet opening of the 3rd resistance R3 the other end and the second electric capacity C2 positive pole and the second operational amplifier IC circuit U 2 is in parallel, and the second electric capacity C2 negative pole is connected with circuitry ground.
As shown in Figure 1, follow feeder loop described in be made up of the second operational amplifier IC circuit U 2 and peripheral circuit the 4th resistance R4, the 8th resistance R8, the 9th resistance R9, the 3rd electric capacity C3.The common mode inlet opening of the second operational amplifier IC circuit U 2 is connected with the output terminal of described pwm signal change-over circuit, is namely connected with the points of common connection of the 3rd resistance R3, the second electric capacity C2; Its difference-mode input mouth is then connected with the points of common connection of the 4th resistance R4, the 3rd electric capacity C3, the 8th resistance R8.4th resistance R4 the other end welding system power vd D positive pole, another pole connection circuit of 3rd electric capacity C3 systematically, be connected through the negative pole interface of the eight resistance R8 the other ends with feedback sample resistance the 9th resistance R9 and Proportional valve, the 9th resistance R9 the other end put in circuit systematically.The output terminal of the circuit U 2 of the second operational amplifier IC is connected with base resistance the 5th resistance R5 of the first triode Q1 in valve-driving circuit.
As shown in Figure 1, described electrohydraulic valve actuator route first, second triode Q1, Q2 and peripheral circuit the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the first diode D1 form, wherein the first triode Q1 is NPN type pipe, and the second triode Q2 is positive-negative-positive pliotron.One end of base resistance the 5th resistance R5 of the first triode Q1 is connected with the output terminal of the second operational amplifier IC circuit U 2 of following in feeder loop, and the other end of the 5th resistance R5 is connected with the base stage of the first triode Q1.First triode Q1 emitter is directly connected with circuitry ground, its collector electrode is connected with base resistance the 6th resistance R6 of pliotron second triode Q2, the 6th resistance R6 the other end is connected with the base stage of the second triode Q2 and the 7th resistance R7 of pull-up resistor, the other end of the 7th resistance R7 and the emitter access Proportional valve working power VCC positive pole of the second triode Q2.The collector electrode of the second triode Q2 is connected with the anode interface of Proportional valve; first diode D1 is as the reversal protection diode of Proportional valve; it is together with Proportional valve reverse parallel connection, and its negative pole is connected with the anode interface of Proportional valve, and positive pole is then connected with the negative pole interface of Proportional valve.The negative pole interface of Proportional valve is with the 8th resistance 8 of following in feeder loop and feedback sample resistance the 9th resistance R9 phase and connect.
As shown in Figure 1, in described circuit, the negative pole of system power supply VDD, Proportional valve working power VCC is all connected with circuitry ground.Namely under in described circuit, first, second operational amplifier IC circuit U 1, U2 are all operated in system power supply VDD, be also connected with system power supply VDD positive pole described in its positive source, described in power cathode with circuitry be connected.
As shown in Figure 1, during circuit working, pwm signal is through the first resistance R1, the second resistance R2 dividing potential drop, the corresponding analog voltage signal of a little ripple is converted again to after the first electric capacity C1 filtering, again through first operational amplifier IC circuit U 1 form follow shaping circuit after, comparatively stable analog voltage is exported at the output terminal of the first operational amplifier IC circuit U 1, and then through the 3rd resistance R3, the further voltage stabilizing of the second electric capacity C2, finally output to the common mode input end of the second operational amplifier IC circuit U 2.
When working initial, the driving triode second triode Q2 of Proportional valve is in closed condition, therefore Proportional valve operating voltage is zero, thus feedback resistance the 9th resistance R9 two ends resistance is also zero, therefore the voltage of the common mode input end of the second operational amplifier IC circuit U 2 is also zero, now the output end voltage of the second operational amplifier IC circuit U 2 is VDD, this voltage is input to the base stage through a triode Q1 through the 5th resistance R5, first triode Q1 opens, correspondingly pass through the 6th resistance R6, pliotron second triode Q2 produces base current and leaks into systematically, thus the second triode Q2 is also opened, therefore Proportional valve supply voltage VCC is applied on Proportional valve and feedback resistance the 9th resistance R9.Feedback voltage on feedback resistance the 9th resistance R9 through the 8th resistance R8, the 3rd electric capacity C3 filtering voltage regulation and after the clamped effect of the 4th resistance R4 feed back input to the difference-mode input end of the second operational amplifier IC circuit U 2.Second operational amplifier IC circuit U 2 common mode terminal voltage and difference-mode input terminal voltage compare, and when the former is greater than the latter, it continues to export high pressure VDD, otherwise exports no-voltage.So repeatedly, until the second operational amplifier IC circuit U 2 common mode terminal voltage and difference-mode input terminal voltage difference are close to zero.Like this, second operational amplifier IC circuit U 2 and peripheral circuit thereof constitute the negative feedback voltage follower circuit of complete set in fact, the feedback voltage of Proportional valve is allowed tightly to follow the voltage of the first operational amplifier IC circuit U 2 common mode input end, the target voltage also namely required by pwm signal.This ensure that the operating voltage of Proportional valve is just tightly followed the target voltage change required by pwm signal and changes.
When circuit is implemented, the Selecting parameter of components and parts is most important, one, the selection of divider resistance first resistance R1, the second resistance R2, equal or the R1≤R2 of the two value general, to ensure that the pwm signal amplitude point to press out is within 0.5VDD, thus the first operational amplifier IC circuit U 1 follow voltage range in its lower terminal voltage district, make the operating accuracy of the first operational amplifier IC circuit U 1 higher.Next is choosing of feedback the 9th resistance R9 size, and this resistance value will be selected according to pwm signal scope, the first resistance R1 and the value of the second resistance R2 and the operating voltage range of Proportional valve.Generally speaking, resistance value+induction reactance the value of Proportional valve is 82 ~ 100 Ω (getting intermediate value 90), the operating voltage of Proportional valve is VCC, when the value of the first resistance R1 and the second resistance R2 ensures that the common mode input end analog voltage of the second operational amplifier IC circuit U 2 changes within 0.5VDD, R9=0.5VDD × 90/ (VCC-0.5VDD-0.2), wherein 0.2 is the Vce minimum tube pressure drop of triode Q2.Work as VDD=5V, during VCC=24V, R9 ≈ 10 Ω.
Above-described is only preferred embodiments of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the principles of the present invention, can also make some improvement and modification, this is also considered as protection scope of the present invention.
Claims (3)
1. a gas ratio valve PWM drive circuit, it is characterized in that: it comprises the pwm signal change-over circuit be made up of the first operational amplifier IC circuit (U1) and peripheral circuit thereof, second operational amplifier IC circuit (U2) and peripheral circuit composition thereof follow feeder loop, three parts such as the valve-driving circuit of the first triode (Q1), the second triode (Q2) and peripheral circuit thereof composition;
Pwm signal change-over circuit with follow feeder loop and be connected, follow feeder loop and be connected with valve-driving circuit;
Described pwm signal change-over circuit is made up of the first operational amplifier IC circuit (U1) and peripheral circuit first resistance (R1) thereof, the second resistance (R2), the 3rd resistance (R3), the first electric capacity (C1), the second electric capacity (C2); First resistance (R1) one end is as pwm signal input interface, the other end is then connected in parallel the common mode inlet opening of rear access first operational amplifier IC circuit (U1) with the first electric capacity (C1) positive pole, the second resistance (R2), and the first electric capacity (C1) negative pole, the second resistance (R2) the other end are all connected with circuitry ground; The difference-mode input mouth of the first operational amplifier IC circuit (U1) is then directly connected with its output terminal, then connects with the 3rd resistance (R3) through output terminal; The common mode inlet opening of the 3rd resistance (R3) the other end and the second electric capacity (C2) positive pole and the second operational amplifier IC circuit (U2) is in parallel, and the second electric capacity (C2) negative pole is connected with circuitry ground;
Described feeder loop of following is made up of the second operational amplifier IC circuit (U2) and peripheral circuit the 4th resistance (R4) thereof, the 8th resistance (R8), the 9th resistance (R9), the 3rd electric capacity (C3); The common mode inlet opening of the second operational amplifier IC circuit (U2) and the output terminal of described pwm signal change-over circuit are also the 3rd resistance (R3), the points of common connection of the second electric capacity (C2) is connected, and its difference-mode input mouth is then connected with the points of common connection of the 4th resistance (R4), the 3rd electric capacity (C3), the 8th resistance (R8); 4th resistance (R4) the other end welding system power vd D positive pole, 3rd another pole connection circuit of electric capacity (C3) systematically, 8th resistance (R8) the other end is connected with the 9th resistance (R9) of feedback sample resistance and the negative pole interface of Proportional valve, and the 9th resistance (R9) the other end put in circuit systematically; The output terminal of the second operational amplifier IC circuit (U2) is connected with the base resistance the 5th resistance (R5) of the first triode (Q1) in valve-driving circuit;
Described first, second triode of electrohydraulic valve actuator route (Q1, Q2) and peripheral circuit the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), the first diode (D1) composition, one end of the base resistance the 5th resistance (R5) of the first triode (Q1) is connected with the output terminal of the second operational amplifier IC circuit (U2) of following in feeder loop, and the other end of the 5th resistance (R5) is connected with the base stage of the first triode (Q1); First triode (Q1) emitter is directly connected with circuitry ground, its collector electrode is connected with the base resistance the 6th resistance (R6) of pliotron second triode (Q2), base stage and the pull-up resistor the 7th resistance (R7) of the 6th resistance (R6) the other end and the second triode (Q2) are connected, the other end of the 7th resistance (R7) and the emitter access Proportional valve working power VCC positive pole of the second triode (Q2); The collector electrode of the second triode (Q2) is connected with the anode interface of Proportional valve, first diode (D1) is as the reversal protection diode of Proportional valve, it is together with Proportional valve reverse parallel connection, and its negative pole is connected with the anode interface of Proportional valve, and positive pole is then connected with the negative pole interface of Proportional valve; The negative pole interface of Proportional valve and the 8th resistance 8 of following in feeder loop and feedback sample resistance the 9th resistance (R9) are mutually and connect;
In described gas ratio valve PWM drive circuit, the negative pole of system power supply VDD, Proportional valve working power VCC is all connected with circuitry ground; Under described first operational amplifier IC circuit (U1), the second operational amplifier IC circuit (U2) are all operated in system power supply VDD, also namely its positive source is connected with system power supply VDD positive pole, and power cathode is connected with circuitry ground.
2. a kind of gas ratio valve PWM drive circuit according to claim 1, is characterized in that: the first triode (Q1) is NPN type pipe, and the second triode (Q2) is positive-negative-positive.
3. a kind of gas ratio valve PWM drive circuit according to claim 1 and 2, is characterized in that: the resistance of the first resistance R1 is less than or equal to the resistance of the second resistance R2.
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| CN201310304252.9A CN103411010B (en) | 2013-07-19 | 2013-07-19 | A kind of gas ratio valve PWM drive circuit |
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| CN201310304252.9A CN103411010B (en) | 2013-07-19 | 2013-07-19 | A kind of gas ratio valve PWM drive circuit |
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| CN103411010B true CN103411010B (en) | 2015-12-23 |
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| CN105278412B (en) * | 2015-10-30 | 2019-05-17 | 青岛海尔科技有限公司 | Control method, device and the gas-cooker of a kind of pair of stepless fire tuning of gas-cooker |
| CN105424122A (en) * | 2015-12-29 | 2016-03-23 | 成都兴联宜科技有限公司 | Valve control circuit for photoelectric direct-reading large-diameter remote water meter |
| CN105629784A (en) * | 2015-12-29 | 2016-06-01 | 成都兴联宜科技有限公司 | Photoelectric direct-reading telemetering valve control water meter valve control circuit |
| CN109240144B (en) * | 2017-07-10 | 2023-07-18 | 青岛经济技术开发区海尔热水器有限公司 | Constant opening control proportional valve opening adjustment control circuit |
| CN109426178A (en) * | 2017-08-24 | 2019-03-05 | 泰乐玛汽车制动系统（上海）有限公司 | Proportional valve control system |
| CN107463091A (en) * | 2017-09-14 | 2017-12-12 | 杭州电子科技大学 | Applied to cell, the self-powered control system circuit of industrial water supply pipe network |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797980A (en) * | 1980-12-10 | 1982-06-17 | Rinnai Corp | Controller for proportion valve |
| CN101149594A (en) * | 2006-09-22 | 2008-03-26 | 广东万和集团有限公司 | Gas ratio valve control circuit |
| CN102117052A (en) * | 2009-12-31 | 2011-07-06 | 北京谊安医疗系统股份有限公司 | Drive control device used for proportional valve |
| CN202228762U (en) * | 2011-09-28 | 2012-05-23 | 于邦仲 | Proportional valve drive control circuit |
| CN202349346U (en) * | 2011-11-17 | 2012-07-25 | 樱花卫厨（中国）股份有限公司 | Proportioning valve control circuit for gas water heater |
| CN203477541U (en) * | 2013-07-19 | 2014-03-12 | 佛山市顺德区希骏电子有限公司 | Gas proportional valve PWM (Pulse-Width Modulation) drive circuit |
-
2013
- 2013-07-19 CN CN201310304252.9A patent/CN103411010B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797980A (en) * | 1980-12-10 | 1982-06-17 | Rinnai Corp | Controller for proportion valve |
| CN101149594A (en) * | 2006-09-22 | 2008-03-26 | 广东万和集团有限公司 | Gas ratio valve control circuit |
| CN102117052A (en) * | 2009-12-31 | 2011-07-06 | 北京谊安医疗系统股份有限公司 | Drive control device used for proportional valve |
| CN202228762U (en) * | 2011-09-28 | 2012-05-23 | 于邦仲 | Proportional valve drive control circuit |
| CN202349346U (en) * | 2011-11-17 | 2012-07-25 | 樱花卫厨（中国）股份有限公司 | Proportioning valve control circuit for gas water heater |
| CN203477541U (en) * | 2013-07-19 | 2014-03-12 | 佛山市顺德区希骏电子有限公司 | Gas proportional valve PWM (Pulse-Width Modulation) drive circuit |
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