CN106369212A - Electromagnetic valve drive circuit for fuel gas system - Google Patents
Electromagnetic valve drive circuit for fuel gas system Download PDFInfo
- Publication number
- CN106369212A CN106369212A CN201611078473.9A CN201611078473A CN106369212A CN 106369212 A CN106369212 A CN 106369212A CN 201611078473 A CN201611078473 A CN 201611078473A CN 106369212 A CN106369212 A CN 106369212A
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- China
- Prior art keywords
- circuit
- valve
- driving
- electromagnetic valve
- driving circuit
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses an electromagnetic valve drive circuit for a fuel gas system. The electromagnetic valve drive circuit for the fuel gas system is characterized by comprising a control unit and a plurality of drive chips, wherein a plurality of electromagnetic valve drive circuit units are integrated in the drive chips, the control unit is used for receiving control signals and sends the control signals to the drive chips selectively, the drive chips receiving the control signals control the corresponding electromagnetic valve drive circuit units to work and output drive signals to drive corresponding electromagnetic switching valves. By means of integration of the electromagnetic valve drive circuit units, the whole circuit design is simplified, PCB (printed circuit board) wiring is simplified, welding spots exposed outside are reduced, the overall reliability and safety of the system are improved, besides, the circuit extensibility is better, and the circuit can better meet the requirement of actual application.
Description
Technical field
The present invention relates to a kind of driving circuit for electromagnetic valve, more particularly, to a kind of solenoid-driven electricity for gas burning system
Road.
Background technology
Gas appliance includes gas-cooker, gas heater etc., has become the household appliances of very popularization at present.Its core
Gas burning system comprises multiple solenoid valve module, and wherein, electromagnetic switch valve is in order to the opening of combustion gas transmission pipeline at different levels in control system
Open and turn off, play a steam linkage and the effect of duplicate protection；Gas ratio valve is the regulating valve of combustion gas and AIR Proportional,
Its Main Function is to stablize proportioning valve output pressure and adjust proportioning valve output pressure according to input current, can make combustion by adjusting
Fully, energy saving is environmental for gas burning.Meanwhile, passing ratio valve controls the ratio of combustion gas in pipeline in use, that is, to combustion
The control of throughput can achieve to Gas appliance fired state, initial stage fired state, and big fire, moderate heat, small fire in combustion process
Control Deng different conditions.
These states of design solenoid need to control by microcontrollers such as mcu, but mcu driving force itself is relatively
Weak it is impossible to direct drive electromagnetic valve, therefore need between microcontroller and electromagnetic valve connect drive circuit.
In order to realize above-mentioned driving function, mainly use in current gas burning system control board audion, resistance, electric capacity,
The discrete devices such as diode realizing the driving of electromagnetic valve, its discrete device circuit structure is as shown in figure 1, pass through to receive by this structure
The control signal of mcu carrys out drive magnetic valve.Mcu controls the operation principle of electromagnetic valve as follows:
(1) in figure Part I is power failure monitor part, is controlled by mcu control signal and whether detects power supply
Normally, to guarantee the trouble free service of circuit.When supply voltage normal power supply, and driving tube q12 normal work, when no damaging, mcu
Input high level is so that 24v supply voltage passes through driving tube q12 to each road in lower section drive circuitry.Now, power failure inspection
Survey end and be output as low, represent power supply and power normally (power failure monitor output par, c be 5v DC-voltage supply).When input electricity
When extruding existing exception or driving tube q12 damage, power failure monitor end output state will be height by low saltus step, feed back to control unit
Divide mcu, mcu controls deenergization to power, and shows power failure simultaneously.
(2) mv1, sv1, sv2 are three electromagnetic switch valves, only exist the two states of on an off, mainly during normal work
It is used for controlling being switched on and off of gas pipeline path at different levels in whole gas burning system, prevent the exception of combustion gas from revealing.It drives
Structure is similar, and when power failure monitor output is without exception, 24v direct current power source voltage is via driving tube q12 Gei Gai tri- road electromagnetism
Switch valve drive circuitry, and the control to three electromagnetic switch valves is realized by mcu control signal.
(3) blf is electromagnetic proportional valve, and during normal work, its working condition is not limited only to be switched on and off two states, it
The aperture of valve port can be given according to the size of applied driving current, and fine nothing can constantly be carried out according to the change of electric current
Level is adjusted, and can immediately be adjusted to required combustion gas output pressure.Pipeline in work is controlled with this by electromagnetic proportional valve
Flow is passed through in interior combustion gas, and then controlling the fired state outside gas appliance.
(4) when driving electromagnetic proportional valve (blf), this road corresponding drives needs external proportioning valve current feedback electricity
Road, this partial circuit is made up of rc filter structure and external sampling resistor, carries out sampling prison to the driving current of electromagnetic proportional valve
Control.
Components and parts needed for discrete device scheme are more, and the wiring of pcb plate is complicated, solder joint many (an exposure solder joint about more than 100),
Debugging trouble, runs into hardly expansible during the electromagnetic valve needing to drive more numbers in practical application.
Content of the invention
It is an object of the present invention to provide a kind of driving circuit for electromagnetic valve for gas burning system, by the improvement of structure, simplify
The wiring of pcb plate, reduces pcb plate suqare, improves integrated level and the reliability of circuit, increased expansible in practical application
Property.
For reaching above-mentioned purpose, the technical solution used in the present invention is: a kind of solenoid-driven electricity for gas burning system
Road, including a control unit and several driving chip, is integrated with several driving circuit for electromagnetic valve, institute in described driving chip
State control unit to receive control signal and select to be sent to described driving chip, receive the described driving chip control of control signal
Make corresponding driving circuit for electromagnetic valve work, output drive signal drives corresponding electromagnetic switch valve.
In technique scheme, include driving chip described in two panels, in each described driving chip, be integrated with two respectively
Way solenoid valve drive circuit, and a power failure detection circuit, an over-voltage detection circuit and power failure monitor output electricity
Road, the outfan of driving circuit for electromagnetic valve described in each road is simultaneously connected to a fly-wheel diode.
Further technical scheme is, the test side of described power failure detection circuit and over-voltage detection circuit respectively with institute
The power end stating driving chip connects, and the power work detecting status signal is passed through described power failure monitor output circuit
It is sent to the feedback end of described control unit.
In technique scheme, in driving circuit for electromagnetic valve described in two-way, the npn that a road is mainly made up of two audions
Type Darlington driving structure forms, and its control end is connected with control unit；Another road is mainly by a pnp audion and three
Npn triode composition pnp Darlington driving structure composition, accesses the base terminal of described Npn triode of importation and connects
There is the diode of at least three series connection.
In technique scheme, in described driving chip, it is additionally provided with a proportioning valve feedback circuit, this proportioning valve feedback circuit
It is made up of filter circuit and sampling resistor, its input control end is connected with the control signal outfan of described control unit, is elected to
Lead to described proportioning valve feedback circuit when, an outfan of driving circuit for electromagnetic valve described in described driving chip Zhong mono- tunnel with described
Proportioning valve feedback circuit output connects；When not gated described proportioning valve feedback circuit, the driving circuit for electromagnetic valve on this road
One output head grounding.
Further technical scheme is, driving circuit for electromagnetic valve described in two-way, and a road is ordinary electromagnetic valve-driving circuit, outward
Connect electromagnetic switch valve, another road is compatible electromagnetism valve-driving circuit, this compatible electromagnetism valve-driving circuit is external electromagnetic switch valve
Or electromagnetic proportional valve, when described proportioning valve feedback circuit accesses in described compatible electromagnetism valve-driving circuit, described compatible electromagnetism valve
Drive circuit is circumscribed with electromagnetic proportional valve.
In technique scheme, the input of each circuit, outfan and power supply in described driving chip, all connect power supply
Enter esd protection structure.
In technique scheme, in described driving chip, it is also integrated with current foldback circuit, thermal-shutdown circuit.
Because technique scheme is used, the present invention compared with prior art has the advantage that
1. the drive circuit of drive magnetic valve is integrated in several chips the present invention, is inputted by control unit mcu
Controlling the working condition of drive circuit drive magnetic valve, compared with conventional discrete device scheme, the concordance of circuit obtains signal
The problems such as arrived raising, and solved the debugging trouble brought because device is numerous, interfere with each other, simplifies whole electromechanics simultaneously
Road is designed, and simplifies the wiring of pcb plate, decreases pcb plate suqare, improve integrated level and the reliability of circuit, reduces whole
The installation complexity of combustion gas Circuits System, reduces the cost of whole gas burning system.
2., because drive circuit adopts integrated chip design, a large amount of minimizing pcb plates expose solder joint outside, about can reduce
70% solder joint number, thus effectively increase the overall reliability of system and safety coefficient.
3. adopt control unit to control the design of multiple driving chip, use can be increased or decreased according to actual needs
Drive circuit number and driving port number, are rapidly performed by extension adaptation, more convenient and efficient.
4. in drive circuit, it is integrated with power failure detection circuit, over-voltage detection circuit, current foldback circuit, overheat protector
Circuit, also can increase the protection circuit of congruence property in the chips, thus improve reliability and the safety of circuit use；
5. it is integrated with proportioning valve current feedback circuit in driving chip, according to actual needs, connected by periphery
Mode gates driving electromagnetic switch valve and electromagnetic proportional valve, realizes the compatible driving of control unit；
6. it is designed with fly-wheel diode in the driving chip of every road, make for protection from during the inductive loads such as drive magnetic valve
With all accessing esd protection structure on the input of each circuit, output and power supply, power supply ground, preventing static discharge to whole simultaneously
The damage that circuit causes, improves the safety of circuit.
Brief description
Fig. 1 is the electrical block diagram in background of invention；
Fig. 2 is the circuit structure block diagram of the embodiment of the present invention one；
Fig. 3 is the circuit structure block diagram in the embodiment of the present invention one within driving chip.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described:
Embodiment one: referring to shown in Fig. 2,3, a kind of driving circuit for electromagnetic valve for gas burning system, including a control list
First mcu and several driving chip, are integrated with several driving circuit for electromagnetic valve in described driving chip, described control unit connects
Receive control signal and select to be sent to described driving chip, the described driving chip receiving control signal controls corresponding electromagnetism
Valve-driving circuit works, and output drive signal drives corresponding electromagnetic switch valve.
In the present embodiment, as shown in Fig. 2 control signal is inputted to integrated drive chips by control unit mcu (108)
(107), control the unlatching that the inner drive circuit of driving chip (107) opens and closes electromagnetic switch valve or controls electromagnetic proportional valve
Closing ratio state.
Comprise inside driving chip (107) as described in Figure 2: power failure detection circuit (101), over-voltage detection circuit
(102), power failure monitor output circuit (103), driving circuit for electromagnetic valve -1 (104), driving circuit for electromagnetic valve -2 (105),
Proportioning valve current feedback circuit (106).Every road drives indoor design to have fly-wheel diode (d40, d50), for drive magnetic valve
Shield during Deng inductive load.Meanwhile, circuit modules are designed with power supply, esd to power supply in input, output and all
Protection structure is it is ensured that the reliability of circuit.
Power failure detection circuit (101) and over-voltage detection circuit (102) by the power work detecting state (normal or
Fault) control unit mcu (108) is fed back to by power failure monitor output circuit (103).If detection power supply fault-free,
Power supply normal power supply, control unit mcu (108) inputs the working condition that control signal controls each electromagnetic valve.If electricity is detected
Source fault, then disconnect 24v power supply and power, and show power failure；
In the present embodiment simultaneously using two chips (107), as shown in figure 3, specific as follows:
1. power failure detection circuit (101): this is and is typically driven by pnp Darlington driving structure and npn pipe
The driving structure of dynamic composition, by resistance r11～r18, npn pipe q11, q13, q14, q15, pnp pipe q12 and diode d10,
D11, d12, dn form, and wherein d10 is fly-wheel diode, and dn represents the diode of n series connection, designs n >=1, n can be according to input
The design requirement of voltage range is changed.The control signal that mcu (108) inputs is accepted by power_en, according to control signal
To control unlatching and the disconnection of power supply.When a power failure is detected, detection signal exports (103) by power failure monitor
Power_judge feeds back to mcu (108), and mcu (108) controls disconnection 24v power supply to power.
2. over-voltage detection circuit (102): this is a typical over-pressed detection module realized according to electric resistance partial pressure principle,
By resistance r21～r24, npn pipe q22, pnp pipe q21 forms, and the resistance ratio of wherein r21, r22 determines over-pressed test point
Position.Design independent 5v DC-voltage supply, when supply voltage overvoltage is detected, detection signal passes through power failure monitor
Output (103) power_judge feeds back to mcu (108), and mcu (108) controls disconnection 24v power supply to power.
3. power failure monitor output circuit (103): power failure monitor output par, c by resistance r31, npn pipe q31,
Q32 forms.During power supply normal power supply, power failure monitor output (103) power_judge is output as height, when power failure inspection
Survey (101) or overvoltage detection (102) arbitrary detection when being out of order, power failure monitor output (103) power_judge output will
It is low by high saltus step, this output signal feeds back to mcu (108), mcu (108) controls disconnection 24v power supply to power.Display power supply supplies
Electric fault, needs reparing.When power failure is detected, mcu (108) controls and ensures that each electromagnetic valve is in cut out shape
State is it is ensured that combustion gas uses safety.
4. solenoid-driven -1 (104) (ordinary electromagnetic valve-driving circuit): by resistance r41～r43, npn pipe q41, q42 with
And diode d40 composition, it is a typical npn Darlington driving structure, diode d40 is fly-wheel diode, for driving
Shield during the inductive loads such as moving electromagnetic valve.Mcu (108) inputs control signal by sv1_drive and controls electromagnetism
The open and close state of switch valve.
5. solenoid-driven -2 (105) (compatible electromagnetism valve-driving circuit): by resistance r51～r55, pnp pipe q52, npn manage
Q51, q53, q54 and diode d50, d51, d52 and dm composition, dm represents the diode of n series connection, designs n >=1, n can root
Design requirement according to input voltage range is changed.This structure is a typical pnp Darlington driving structure, diode
D50 is fly-wheel diode, shields during for inductive loads such as drive magnetic valves.Solenoid-driven -2 can compatible be driven
Dynamic electromagnetic switch valve and electromagnetic proportional valve.When driving electromagnetic switch valve, con4 is in external demand and gnd4 short circuit；When driving electromagnetism ratio
During example valve, it is connected with proportioning valve current feedback circuit (106) inside con4, i_fb is that proportioning valve current feedback circuit (106) is defeated
Enter control end.Mcu (108) inputs, by sv2_drive, open and close or the electromagnetism ratio that control signal controls electromagnetic switch valve
The unlatching ratio state of example valve.
6. proportioning valve current feedback circuit (106): by resistance r61～r63, electric capacity c61, c62 form, when electromagnetic valve drives
When dynamic -2 circuit (105) drive electromagnetic proportional valve, need to connect and using this module, driving output current be carried out detecting control.
Claims (8)
1. a kind of driving circuit for electromagnetic valve for gas burning system it is characterised in that: include a control unit and several driving
Chip, is integrated with several driving circuit for electromagnetic valve in described driving chip, described control unit receives control signal and selects
It is sent to described driving chip, the described driving chip receiving control signal controls corresponding driving circuit for electromagnetic valve work,
Output drive signal drives corresponding electromagnetic switch valve.
2. the driving circuit for electromagnetic valve for gas burning system according to claim 1 it is characterised in that: include two panels institute
State driving chip, in each described driving chip, be integrated with two-way driving circuit for electromagnetic valve respectively, and a power failure monitor
Circuit, an over-voltage detection circuit and a power failure monitor output circuit, the outfan of driving circuit for electromagnetic valve described in each road
And it is connected to a fly-wheel diode.
3. the driving circuit for electromagnetic valve for gas burning system according to claim 2 it is characterised in that: described power failure
The test side of testing circuit and over-voltage detection circuit is connected with the power end of described driving chip respectively, by the power supply detecting work
Make the feedback end that status signal is sent to described control unit by described power failure monitor output circuit.
4. the driving circuit for electromagnetic valve for gas burning system according to claim 2 it is characterised in that: electromagnetism described in two-way
In valve-driving circuit, the npn Darlington driving structure that a road is mainly made up of two audions forms, its control end and control
Unit connects；Another road is mainly formed pnp Darlington driving structure and is formed by a pnp audion and three Npn triode,
Access the described Npn triode base terminal of importation and be connected to the diode of at least three series connection.
5. the driving circuit for electromagnetic valve for gas burning system according to claim 1 and 2 it is characterised in that: described driving
It is additionally provided with a proportioning valve feedback circuit, this proportioning valve feedback circuit is made up of filter circuit and sampling resistor, its input in chip
Control end is connected with the control signal outfan of described control unit, when gating described proportioning valve feedback circuit, described driving
Described in chip Zhong mono- tunnel, an outfan of driving circuit for electromagnetic valve is connected with described proportioning valve feedback circuit output；When unselected
When leading to described proportioning valve feedback circuit, an output head grounding of the driving circuit for electromagnetic valve on this road.
6. the driving circuit for electromagnetic valve for gas burning system according to claim 5 it is characterised in that: electromagnetism described in two-way
Valve-driving circuit, a road is ordinary electromagnetic valve-driving circuit, external electromagnetic switch valve, and another road is compatible electromagnetism electrohydraulic valve actuator
Road, this compatible electromagnetism valve-driving circuit is external electromagnetic switch valve or electromagnetic proportional valve, when described proportioning valve feedback circuit accesses
In described compatible electromagnetism valve-driving circuit, described compatible electromagnetism valve-driving circuit is circumscribed with electromagnetic proportional valve.
7. the driving circuit for electromagnetic valve for gas burning system according to claim 1 and 2 it is characterised in that: described driving
In chip, the input of each circuit, outfan and power supply, power supply ground all access esd protection structure.
8. the driving circuit for electromagnetic valve for gas burning system according to claim 1 it is characterised in that: described driving chip
In be also integrated with current foldback circuit, thermal-shutdown circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611078473.9A CN106369212B (en) | 2016-11-30 | 2016-11-30 | A kind of driving circuit for electromagnetic valve for gas burning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611078473.9A CN106369212B (en) | 2016-11-30 | 2016-11-30 | A kind of driving circuit for electromagnetic valve for gas burning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106369212A true CN106369212A (en) | 2017-02-01 |
| CN106369212B CN106369212B (en) | 2018-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611078473.9A Active CN106369212B (en) | 2016-11-30 | 2016-11-30 | A kind of driving circuit for electromagnetic valve for gas burning system |
Country Status (1)
| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895190A (en) * | 2018-08-15 | 2018-11-27 | 中山市铧禧电子科技有限公司 | The control driving circuit of compatible a variety of proportioning valves |
| CN110925477A (en) * | 2019-12-25 | 2020-03-27 | 南京劲淳自动化科技有限公司 | Integrated form solenoid valve control module group |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201247402Y (en) * | 2008-06-03 | 2009-05-27 | 上海芙蓉实业有限公司 | Controller for gas stove |
| CN102401169A (en) * | 2010-09-10 | 2012-04-04 | 广东万和新电气股份有限公司 | Drive circuit of main solenoid valve of gas water heater |
| CN202709476U (en) * | 2012-05-31 | 2013-01-30 | 广东百威电子有限公司 | Control system of constant-temperature gas water heater |
| JP2015152160A (en) * | 2014-02-19 | 2015-08-24 | リンナイ株式会社 | solenoid valve drive circuit |
| CN105222175A (en) * | 2015-10-30 | 2016-01-06 | 广州惠远电子有限公司 | Gas-cooker intelligence control system |
-
2016
- 2016-11-30 CN CN201611078473.9A patent/CN106369212B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201247402Y (en) * | 2008-06-03 | 2009-05-27 | 上海芙蓉实业有限公司 | Controller for gas stove |
| CN102401169A (en) * | 2010-09-10 | 2012-04-04 | 广东万和新电气股份有限公司 | Drive circuit of main solenoid valve of gas water heater |
| CN202709476U (en) * | 2012-05-31 | 2013-01-30 | 广东百威电子有限公司 | Control system of constant-temperature gas water heater |
| JP2015152160A (en) * | 2014-02-19 | 2015-08-24 | リンナイ株式会社 | solenoid valve drive circuit |
| CN105222175A (en) * | 2015-10-30 | 2016-01-06 | 广州惠远电子有限公司 | Gas-cooker intelligence control system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895190A (en) * | 2018-08-15 | 2018-11-27 | 中山市铧禧电子科技有限公司 | The control driving circuit of compatible a variety of proportioning valves |
| CN108895190B (en) * | 2018-08-15 | 2023-10-03 | 中山市铧禧电子科技有限公司 | Control driving circuit compatible with various proportional valves |
| CN110925477A (en) * | 2019-12-25 | 2020-03-27 | 南京劲淳自动化科技有限公司 | Integrated form solenoid valve control module group |
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| Publication number | Publication date |
|---|---|
| CN106369212B (en) | 2018-12-04 |
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Address after: 214135 -6, Linghu Avenue, Wuxi Taihu international science and Technology Park, Wuxi, Jiangsu, China, 180 Patentee after: China Resources micro integrated circuit (Wuxi) Co., Ltd Address before: No. 180-22, Linghu Avenue, Taihu International Science and Technology Park, New District, Wuxi City, Jiangsu Province, 214135 Patentee before: WUXI CHINA RESOURCES SEMICO Co.,Ltd. |