CN209167494U - A kind of gas combustion range ignition switch detection circuit - Google Patents
A kind of gas combustion range ignition switch detection circuit Download PDFInfo
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- CN209167494U CN209167494U CN201821484569.XU CN201821484569U CN209167494U CN 209167494 U CN209167494 U CN 209167494U CN 201821484569 U CN201821484569 U CN 201821484569U CN 209167494 U CN209167494 U CN 209167494U
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- ignition switch
- signal
- isolator
- gas combustion
- detection circuit
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Abstract
The utility model relates to a kind of gas combustion range ignition switch detection circuits, including ignition switch, the controller for detecting igniting switching signal, and it is connected to the signal isolator between ignition switch and controller, the first end of ignition switch is connected in Switching Power Supply, the second end of ignition switch is electrically connected with the signal input part of signal isolator, and the signal output end of signal isolator is electrically connected with the signal input part of controller.The gas combustion range ignition switch detection circuit realizes the signal isolation between switching signal and controller by signal isolator, it solves under conditions of kitchen range twin coil thermocouple plus earth, the problem of low and high level detection that can not be directly exported by ignition switch judges ignition switch signal, and solve the problems, such as to judge inaccuracy with AD Port detecting.The gas combustion range ignition switch detection circuit also can accurately detect igniting switching signal under conditions of kitchen range twin coil thermocouple plus earth.
Description
Technical field
The utility model relates to a kind of gas combustion range ignition switch detection circuits.
Background technique
Gas-cooker is as kitchen for being widely used, and pulse igniter currently on the market is using twin coil
Solenoid valve.Twin coil thermocouple uses the form of plus earth, and certain electric current supply electromagnetism is exported after user is by lower switch
Valve, thermocouple can stablize provide electric current before will not fall valve, reach i.e. point i.e. experience.Accurate using single-chip microprocessor MCU
While valve delay time is inhaled in control, single-chip microprocessor MCU also needs detection switch signal, and common switching signal generallys use inspection
The form of low and high level is surveyed, but because of twin coil thermocouple plus earth, practical ground is 1.5V, for power supply,
Ground is not accurate 0V, and common I/O mouthfuls are unable to judge accurately low and high level signal, and the interference come in when arc ignition from ground
It is bigger.And use AD mouthful to detect, and although may determine that low and high level, the height that is generated when still can not solve arc ignition
Frequency interferes with single-chip microprocessor MCU, leads to chip from misoperation etc..
Utility model content
Technical problem to be solved in the utility model is to provide one kind for the above-mentioned prior art to can be realized switch letter
Signal isolation number between controller, also can accurately detect igniting under conditions of kitchen range twin coil thermocouple plus earth
The gas combustion range ignition switch detection circuit of switching signal.
The technical scheme in the invention for solving the above technical problem are as follows: a kind of gas combustion range ignition switch detection circuit,
It is characterized by comprising ignition switch, for detect igniting switching signal controller, and be connected to the ignition switch and
The first end of signal isolator between controller, the ignition switch is connected in Switching Power Supply, the second end of ignition switch
It is electrically connected with the signal input part of signal isolator, the signal output end of the signal isolator and the signal input part of controller
Electrical connection.
Selectively, the signal isolator is optical coupling isolator, and one end of the input terminal of the optical coupling isolator is logical
It crosses the first current-limiting resistance to be electrically connected with the second end of ignition switch, the other end ground connection of the input terminal of the optical coupling isolator；
One end of the output terminal of the optical coupling isolator connects power supply by pull-up resistor, the output terminal of the optical coupling isolator
Other end ground connection.
It preferably, further include the first filter capacitor, one end of first filter capacitor and the second end electricity of ignition switch
Connection, the other end ground connection of first filter capacitor.
Selectively, the signal isolator is triode, and the base stage of the triode passes through the second current-limiting resistance and point
The second end electrical connection of fire switch, the collector of the triode connect power supply by pull-up resistor, the triode
Emitter ground connection.
It preferably, further include the second filter capacitor, one end of second filter capacitor and the collector of triode are electrically connected
It connects, the other end ground connection of second filter capacitor.
It preferably, further include pull down resistor, the base stage of the triode passes through the emitter of pull down resistor and triode electricity
Connection.
Compared with the prior art, the advantages of the utility model are: the gas combustion range ignition switch detection circuit passes through signal
Isolator realizes the signal isolation between switching signal and controller, controller by low and high level that signal isolator exports come
Judge whether ignition switch is pressed, solves under conditions of kitchen range twin coil thermocouple plus earth, can not directly pass through a little
The problem of low and high level detection of fire switch output judges ignition switch signal, and solve and judge to be not allowed with AD Port detecting
True problem.The gas combustion range ignition switch detection circuit also can be accurate under conditions of kitchen range twin coil thermocouple plus earth
Detection igniting switching signal.
Detailed description of the invention
Fig. 1 is the circuit diagram of gas combustion range ignition switch detection circuit in the utility model embodiment one.
Fig. 2 is the circuit diagram of gas combustion range ignition switch detection circuit in the utility model embodiment two.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
Embodiment one
As shown in Figure 1, the gas combustion range ignition switch detection circuit in the present embodiment, including ignition switch S1, for detecting
The controller 1 of ignition switch signal, and the signal isolator being connected between ignition switch S1 and controller 1, ignition switch
The first end of S1 is connected in Switching Power Supply, and the second end of ignition switch S1 is electrically connected with the signal input part of signal isolator,
The signal output end of signal isolator is electrically connected with the signal input part of controller 1.
Signal isolator in the present embodiment is optical coupling isolator U1, and one end of the input terminal of optical coupling isolator U1 passes through
First current-limiting resistance R1 is electrically connected with the second end of ignition switch S1, the other end ground connection of the input terminal of optical coupling isolator U1.
One end of the output terminal of optical coupling isolator U1 by pull-up resistor R0 connection power supply, the output terminal of optical coupling isolator U1 it is another
One end ground connection.The second end of ignition switch S1 connects the other end ground connection of one first filter capacitor C1, the first filter capacitor C1.
First filter capacitor C1 can carry out efficient wave to ignition switch signal, guarantee the stability of signal.
When work, ignition switch S1 movement, and then igniting switching signal is exported, ignition switch signal passes through optical coupling isolator
After U1, so that the switching signal of optical coupling isolator U1 output can be regarded as power supply as 0V, so that 1 energy of controller
Enough accurate detections and then judge whether ignition switch S1 is closed to the low and high level of ignition switch signal.The process controller 1
The low and high level signal of acquisition is more accurate, is capable of the movement of true reaction initiation switch S1.It solves in kitchen range twin coil
Under conditions of thermocouple plus earth, the low and high level detection that can not be directly exported by ignition switch S1 judges that ignition switch is believed
Number the problem of, and solve the problems, such as to judge inaccuracy with AD Port detecting.The gas combustion range ignition switch detection circuit is in stove
Igniting switching signal also can be accurately detected under conditions of tool twin coil thermocouple plus earth.
Embodiment two
As shown in Fig. 2, the present embodiment and the difference of embodiment one are only that: signal isolator uses triode Q1, three poles
The base stage of pipe Q1 is electrically connected by the second current-limiting resistance R2 with the second end of ignition switch S1, and the collector of triode Q1 passes through upper
Pull-up resistor R0 connection power supply, the emitter ground connection of triode Q1.The collector of triode Q1 is also connected with one second filtering
The other end of capacitor C2, the second filter capacitor C2 are grounded, and the second capacitor is filtered effect to the signal of output, filters out interference,
Guarantee the stability of signal.In addition the base stage of triode Q1 is electrically connected by pull down resistor R3 with the emitter of triode Q1, is protected
Demonstrate,prove the normal work of triode Q1.After ignition switch signal is isolated by triode Q1, the ground of output signal is for power supply
Can regard as 0V so that controller 1 can accurate detection to the low and high level of ignition switch signal, and then judge a little
Whether fire switch S1 is closed.
In addition triode Q1 is lower compared to optical coupling isolator U1 cost.
Claims (6)
1. a kind of gas combustion range ignition switch detection circuit, it is characterised in that: including ignition switch (S1), for detecting ignition switch
The controller (1) of signal, and the signal isolator being connected between the ignition switch (S1) and controller (1), the point
The first end of fire switch (S1) is connected in Switching Power Supply, and the second end of ignition switch (S1) and the signal of signal isolator input
End electrical connection, the signal output end of the signal isolator are electrically connected with the signal input part of controller (1).
2. gas combustion range ignition switch detection circuit according to claim 1, it is characterised in that: the signal isolator is light
One end of coupling isolator (U1), the input terminal of the optical coupling isolator (U1) passes through the first current-limiting resistance (R1) and ignition switch
(S1) second end electrical connection, the other end ground connection of the input terminal of the optical coupling isolator (U1)；The optical coupling isolator
(U1) one end of output terminal by pull-up resistor (R0) connect power supply, the output terminal of the optical coupling isolator (U1) it is another
One end ground connection.
3. gas combustion range ignition switch detection circuit according to claim 2, it is characterised in that: further include the first filter capacitor
(C1), one end of first filter capacitor (C1) is electrically connected with the second end of ignition switch (S1), first filter capacitor
(C1) other end ground connection.
4. gas combustion range ignition switch detection circuit according to claim 1, it is characterised in that: the signal isolator is three
The base stage of pole pipe (Q1), the triode (Q1) is electrically connected by the second current-limiting resistance (R2) and the second end of ignition switch (S1)
It connects, the collector of the triode (Q1) connects power supply, the emitter of the triode (Q1) by pull-up resistor (R0)
Ground connection.
5. gas combustion range ignition switch detection circuit according to claim 4, it is characterised in that: further include the second filter capacitor
(C2), one end of second filter capacitor (C2) is electrically connected with the collector of triode (Q1), second filter capacitor
(C2) other end ground connection.
6. gas combustion range ignition switch detection circuit according to claim 4 or 5, it is characterised in that: further include pull down resistor
(R3), the base stage of the triode (Q1) is electrically connected by pull down resistor (R3) with the emitter of triode (Q1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821484569.XU CN209167494U (en) | 2018-09-11 | 2018-09-11 | A kind of gas combustion range ignition switch detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821484569.XU CN209167494U (en) | 2018-09-11 | 2018-09-11 | A kind of gas combustion range ignition switch detection circuit |
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| Publication Number | Publication Date |
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| CN209167494U true CN209167494U (en) | 2019-07-26 |
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ID=67330994
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821484569.XU Active CN209167494U (en) | 2018-09-11 | 2018-09-11 | A kind of gas combustion range ignition switch detection circuit |
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| CN (1) | CN209167494U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112698605A (en) * | 2020-12-28 | 2021-04-23 | 珠海格力电器股份有限公司 | Multi-node communication circuit |
-
2018
- 2018-09-11 CN CN201821484569.XU patent/CN209167494U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112698605A (en) * | 2020-12-28 | 2021-04-23 | 珠海格力电器股份有限公司 | Multi-node communication circuit |
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