CN203743576U - Switching-valve control circuit of constant-temperature gas water heater - Google Patents
Switching-valve control circuit of constant-temperature gas water heater Download PDFInfo
- Publication number
- CN203743576U CN203743576U CN201320860781.2U CN201320860781U CN203743576U CN 203743576 U CN203743576 U CN 203743576U CN 201320860781 U CN201320860781 U CN 201320860781U CN 203743576 U CN203743576 U CN 203743576U
- Authority
- CN
- China
- Prior art keywords
- resistance
- switch valve
- triode
- electromagnetic coil
- npn triode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a switching-valve control circuit of a constant-temperature gas water heater. The switching-valve control circuit comprises a PWM control signal input end, a freewheeling diode, a switching-valve electromagnetic coil positive electrode terminal, a switching-valve electromagnetic coil negative electrode terminal, an NPN triode and a PNP triode. The collector electrode of the NPN triode is connected with the anode of the freewheeling diode, and the cathode of the freewheeling diode is connected with the switching-valve electromagnetic coil positive electrode terminal. The switching-valve electromagnetic coil positive electrode terminal is connected with the positive electrode of a power source, and the switching-valve electromagnetic coil negative electrode terminal is connected with the collector electrode of the NPN triode. The emitting electrode of the NPN triode is grounded, and the base electrode of the NPN triode is grounded through a fifth resistor. A high level is input into the emitting electrode of the PNP triode, the collector electrode of the PNP triode is connected with the base electrode of the NPN triode, and the base electrode of the PNP triode is connected with the PWM control signal input end. According to the switching-valve control circuit, the NPN triode can be controlled through the 5 V high level, power consumption of the base electrode resistors is low, and the base electrode resistors low in resistance can be adopted.
Description
[technical field]
The utility model relates to gas water heater control circuit, relates in particular to a kind of constant temp gas water heater switch valve control circuit.
[background technique]
The switch valve control circuit of tradition constant temp gas water heater as shown in Figure 1, conventionally carried out the electromagnetic coil of driving switch valve by PNP triode, the base current of PNP triode can only be supplied with by the 24V power supply of switch valve, and base resistance power consumption is large, needs to arrange larger base drive resistance.
[summary of the invention]
It is little that the technical problems to be solved in the utility model is to provide a kind of base resistance power consumption, can adopt the constant temp gas water heater switch valve control circuit of less base resistance.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of constant temp gas water heater switch valve control circuit, comprise pwm control signal input end, fly-wheel diode, switch valve electromagnetic coil positive terminal, switch valve electromagnetic coil negative terminals, NPN triode and PNP triode, the collector electrode of NPN triode connects the anode of fly-wheel diode, and the negative electrode of fly-wheel diode connects switch valve electromagnetic coil positive terminal; Switch valve electromagnetic coil positive terminal connects positive source, and switch valve electromagnetic coil negative terminals connects the collector electrode of NPN triode; The grounded-emitter connection of NPN triode, the base stage of NPN triode is by the 5th resistance eutral grounding; The emitter of PNP triode connects high level, and collector electrode connects the base stage of NPN triode, and base stage connects pwm control signal input end.
Above-described constant temp gas water heater switch valve control circuit, comprises capacitance, the first resistance and discharge diode, the first termination pwm control signal input end of capacitance, the base stage of the second termination PNP triode; The first termination high level of the first resistance, the first end of the second termination capacitance; The anode of discharge diode connects the second end of capacitance, and negative electrode connects the second end of the first resistance.
Above-described constant temp gas water heater switch valve control circuit, comprises the second resistance and the 3rd resistance, the second end of a termination capacitance of the second resistance, the base stage of another termination PNP triode; The base stage of one end PNP triode of the 3rd resistance.The emitter of another termination PNP triode.
Above-described constant temp gas water heater switch valve control circuit, comprises the 4th resistance, the collector electrode of a termination PNP triode of the 4th resistance, the base stage of another termination NPN triode.
The utility model constant temp gas water heater switch valve control circuit can be used 5V high level control NPN triode, and base resistance power consumption is little, can adopt less base resistance.
[brief description of the drawings]
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the circuit diagram of prior art constant temp gas water heater switch valve control circuit.
Fig. 2 is the circuit diagram of the utility model embodiment constant temp gas water heater switch valve control circuit.
[embodiment]
The structure of the utility model embodiment constant temp gas water heater switch valve control circuit and principle as shown in Figure 2, comprise pwm control signal input end PWM, discharge diode D1, sustained diode 2, the capacitance C1 of single-chip microcomputer, switch valve electromagnetic coil positive terminal LEV+ and switch valve electromagnetic coil negative terminals LEV-, NPN triode Q2 and the PNP triode Q1 of circuit.
The first termination pwm control signal input end PWM of capacitance C1, the second end connects the base stage of PNP triode Q1 by resistance R 2; The first termination 5V high level of resistance R 1, the first end of the second termination capacitance C1; The anode of discharge diode D1 connects the second end of capacitance C1, the second end of negative electrode connecting resistance R1.
The base stage of one end PNP triode Q1 of resistance R 3.The emitter of another termination PNP triode Q1.
The emitter of PNP triode Q1 connects 5V high level, and collector electrode connects the base stage of NPN triode Q2 by resistance R 4,
The collector electrode of NPN triode Q2 connects the anode of fly-wheel diode D2, and the negative electrode of sustained diode 2 meets switch valve electromagnetic coil positive terminal LEV+.Switch valve electromagnetic coil positive terminal LEV+ connects 24V positive source, and switch valve electromagnetic coil negative terminals LEV-connects the collector electrode of NPN triode Q2.The grounded-emitter connection of NPN triode Q2.The base stage of NPN triode Q2 is passed through.Resistance R 5 ground connection.
The two ends of switch valve electromagnetic coil are switch valve electromagnetic coil positive terminal LEV+ and switch valve electromagnetic coil negative terminals LEV-respectively.
The above embodiment's of the utility model working principle is as follows: switch valve is solenoid electric valve, circuit driven by electromagnetic means adopts PWM pulse-width modulation type, first negative impulse produces and opens pulsewidth is 400mS, guarantee that solenoid electric valve produces enough large electromagnetic force in opening process, to ensure the reliable unlatching of solenoid electric valve.
After solenoid electric valve is opened, magnetic circuit reluctance is very low, and electromagnetic coil passes into less maintenance electric current and just can produce enough large electromagnetic force and maintain solenoid valve unlatching.Low-energy-consumption can fall in less maintenance electric current, reduces coil heating.
Within a PWM cycle, when PWM input end is low level, capacitor C 1 is through resistance R 2 current-limiting charges, now triode Q1 saturation conduction, its collector electrode is about 4.7V, through resistance R 4, R5 dividing potential drop driving N PN pipe triode Q2, make its saturation conduction, 24V voltage adds on switch valve coil; When PWM input end is high level, capacitor C 1 is discharged through triode D1, resistance R 1, and now, triode Q1, triode Q2 turn-off,
Switch valve coil is through diode D2 afterflow; Switch valve two ends equivalent voltage V=(24V-0.3) * Ton/T; Wherein, Ton is PWM high level time, and T is the PWM cycle.
The above embodiment of the utility model has following characteristics:
1) adopt NPN triode to drive solenoid valve, base resistance power consumption is little, can adopt less base resistance.
2) drive circuit, by Single-chip Controlling, adopts pulse drive mode when work, makes the power switch pipe work of drive circuit more reliable, saves electric power simultaneously, has reduced power component temperature rise.
3) in drive circuit, series capacitance, every straight C1, can be avoided causing the issuable potential safety hazard of switch valve misoperation because control chip crashes.
Claims (4)
1. a constant temp gas water heater switch valve control circuit, comprise pwm control signal input end, fly-wheel diode, switch valve electromagnetic coil positive terminal and switch valve electromagnetic coil negative terminals, it is characterized in that, comprise NPN triode and PNP triode, the collector electrode of NPN triode connects the anode of fly-wheel diode, and the negative electrode of fly-wheel diode connects switch valve electromagnetic coil positive terminal; Switch valve electromagnetic coil positive terminal connects positive source, and switch valve electromagnetic coil negative terminals connects the collector electrode of NPN triode; The grounded-emitter connection of NPN triode, the base stage of NPN triode is by the 5th resistance eutral grounding; The emitter of PNP triode connects high level, and collector electrode connects the base stage of NPN triode, and base stage connects pwm control signal input end.
2. constant temp gas water heater switch valve control circuit according to claim 1, is characterized in that, comprises capacitance, the first resistance and discharge diode, the first termination pwm control signal input end of capacitance, the base stage of the second termination PNP triode; The first termination high level of the first resistance, the first end of the second termination capacitance; The anode of discharge diode connects the second end of capacitance, and negative electrode connects the second end of the first resistance.
3. constant temp gas water heater switch valve control circuit according to claim 2, is characterized in that, comprises the second resistance and the 3rd resistance, the second end of a termination capacitance of the second resistance, the base stage of another termination PNP triode; The base stage of one end PNP triode of the 3rd resistance, the emitter of another termination PNP triode.
4. constant temp gas water heater switch valve control circuit according to claim 1, is characterized in that, comprises the 4th resistance, the collector electrode of a termination PNP triode of the 4th resistance, the base stage of another termination NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860781.2U CN203743576U (en) | 2013-12-24 | 2013-12-24 | Switching-valve control circuit of constant-temperature gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860781.2U CN203743576U (en) | 2013-12-24 | 2013-12-24 | Switching-valve control circuit of constant-temperature gas water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203743576U true CN203743576U (en) | 2014-07-30 |
Family
ID=51343377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320860781.2U Expired - Fee Related CN203743576U (en) | 2013-12-24 | 2013-12-24 | Switching-valve control circuit of constant-temperature gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203743576U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976408A (en) * | 2015-07-20 | 2015-10-14 | 杨迎龙 | Electromagnetic valve control circuit and method |
| CN114362547A (en) * | 2021-12-31 | 2022-04-15 | 珠海雷特科技股份有限公司 | Relay power supply circuit, microwave sensor circuit and working method thereof |
| CN115127238A (en) * | 2021-03-29 | 2022-09-30 | 芜湖美的厨卫电器制造有限公司 | Water heater control circuit and water heater |
-
2013
- 2013-12-24 CN CN201320860781.2U patent/CN203743576U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976408A (en) * | 2015-07-20 | 2015-10-14 | 杨迎龙 | Electromagnetic valve control circuit and method |
| CN115127238A (en) * | 2021-03-29 | 2022-09-30 | 芜湖美的厨卫电器制造有限公司 | Water heater control circuit and water heater |
| CN114362547A (en) * | 2021-12-31 | 2022-04-15 | 珠海雷特科技股份有限公司 | Relay power supply circuit, microwave sensor circuit and working method thereof |
| CN114362547B (en) * | 2021-12-31 | 2023-12-29 | 珠海雷特科技股份有限公司 | Relay power supply circuit, microwave sensor circuit and working method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205160405U (en) | Drive and control circuit and have piezoelectricity injection valve of this circuit | |
| CN203743576U (en) | Switching-valve control circuit of constant-temperature gas water heater | |
| CN203118870U (en) | Improved relay control circuit | |
| CN203858468U (en) | Air conditioner standby power consumption control circuit and air conditioner | |
| CN203260299U (en) | Driving control circuit | |
| CN105202250B (en) | A kind of energy-saving driving device of low tension magnetic-type electrical equipment | |
| CN103075810A (en) | Power control device and water heater | |
| CN201148923Y (en) | Electromagnetic valve injection drive circuit of natural gas engine | |
| CN204190352U (en) | Automatically controlled output short circuit protection circuit | |
| CN201860094U (en) | Short circuit protection circuit for switch power | |
| CN203313152U (en) | Combined switch push-pull pulse output unit | |
| CN205863094U (en) | A kind of drive circuit of single-chip microcomputer output control relay | |
| CN203368305U (en) | Driving circuit of IGBT module power switch | |
| CN101771343B (en) | Driving circuit of high-voltage frequency converter | |
| CN201966020U (en) | Electromagnet energy-saving circuit | |
| CN211018649U (en) | Forward and reverse power supply control device | |
| CN102709021A (en) | Control circuit for electromagnet and electromagnetic valve | |
| CN209981107U (en) | Drive circuit of frequency converter soft start contactor | |
| CN204518107U (en) | Electromagnetic Heating control circuit and electromagnetic appliance | |
| CN203730886U (en) | Control circuit for proportional valve of constant temperature gas water heater | |
| CN202199881U (en) | Intelligent electric soldering iron with energy-saving function | |
| CN202455582U (en) | Signal generating circuit of nuclear marker light | |
| CN106487365A (en) | A kind of multi-channel PWM drive control circuit, drive control method and electrical household appliance | |
| CN202711900U (en) | Control circuit of electromagnet and electromagnetic valve | |
| CN203492248U (en) | DC-DC constant current driving circuit based on discrete device |
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 |
Granted publication date: 20140730 Termination date: 20171224 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |