CN101354148A - Control circuit and method of air valve cut-off for gas combustion range - Google Patents
Control circuit and method of air valve cut-off for gas combustion range Download PDFInfo
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- CN101354148A CN101354148A CNA2008101417083A CN200810141708A CN101354148A CN 101354148 A CN101354148 A CN 101354148A CN A2008101417083 A CNA2008101417083 A CN A2008101417083A CN 200810141708 A CN200810141708 A CN 200810141708A CN 101354148 A CN101354148 A CN 101354148A
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- switching device
- air valve
- cut
- magnetic valve
- control circuit
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Abstract
The invention discloses a gas valve breaking control circuit used in a gas cooker, which comprises a thermocouple, a switching device and an electromagnetic valve which is connected with two poles of the thermocouple to form a loop and is further connected with an external power source through a pull-up resistor and is grounded through the switching device to form a reverse second loop. The invention also discloses a corresponding gas valve breaking control method. The invention realizes breaking control to a gas valve by utilizing an ordinary switching device and is convenient and flexible and low in cost.
Description
Technical field
The present invention relates to the gas-cooker field, relate in particular to a kind of air valve cut-off control circuit and method that is used for gas-cooker.
Background technology
On the present market, great majority all are the cut-outs that realizes gas stove air valve by the manual-lock mechanical button.All towards the present age that intelligent and hommization direction develop, this traditional control mode is obviously backward relatively at various daily facilities.Needs for the adaptive technique development, also proposed in the prior art in gas-cooker by switching device, as relay etc., control the cut-out of air valve, its control circuit is with reference to figure 1, and it is a simple circuit of being made up of thermocouple 1, relay 2 and magnetic valve 3.
Though this scheme has improved the automaticity of Air Valve Control to a certain extent, but, the inventor discovers, because thermocouple itself can only produce the faint signal of telecommunication, thereby in sort circuit, contact resistance to switching device requires very strict, generally all need be below the milliohm at tens, and in the reality contact resistance of switching device commonly used generally all more than 100 milliohms, because switching device commonly used is inapplicable, must adopt special low-resistance device, thereby cause the rising of cost.
Summary of the invention
Technical problem to be solved by this invention is: a kind of air valve cut-off control circuit that is used for gas-cooker is provided, and this circuit can utilize common switching device to realize the cut-out of air valve is controlled, and cost is low.
The further technical problem to be solved of the present invention is: provide a kind of gas stove air valve to cut off control method, this method can utilize common switching device to realize the cut-out of air valve is controlled, and is convenient, flexible.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of air valve cut-off control circuit that is used for gas-cooker includes thermocouple, switching device and magnetic valve, and the two poles of the earth that described magnetic valve is connected thermocouple form first loop; And described magnetic valve also connects external power source and by described switching device ground connection, forms second a reverse loop by a pull-up resistor.
Correspondingly, the present invention also provides a kind of air valve cut-off control method that is used for foregoing circuit, and this method may further comprise the steps:
Keep at magnetic valve controlling the described second loop conducting under the state of adhesive, inject reversing the current, cut off magnetic valve to described magnetic valve.
The invention has the beneficial effects as follows:
Embodiments of the invention apply by the magnetic valve to attracting state and inject a reversing the current and cut off magnetic valve, thereby have realized utilizing the cut-out control of common switching device to air valve, and are convenient, flexible, cost is low.
The present invention is described in further detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the existing circuit theory diagrams that are used for the air valve cut-off control circuit of gas-cooker.
Fig. 2 is the circuit theory diagrams of an embodiment of air valve cut-off control circuit provided by the invention.
The specific embodiment
Core of the present invention is to utilize magnetic valve to keep the principle of adhesive under the effect of the electromagnetic field that the electric current that flows through coil produces.Based on this principle, as long as can change the size of its electric current, just can change the state of magnetic valve, thereby, by injecting the voltage opposite with the thermocouple direction from the outside to magnetic valve, make the size of current of coil change, and then change the intensity of its electromagnetic field, cause magnetic valve by adhesive to disconnection.
With reference to figure 2, this figure is the circuit theory diagrams that are used for an embodiment of air valve cut-off control circuit of gas-cooker provided by the invention; As shown in the figure, in the present embodiment, the components and parts in the circuit are mainly by thermocouple 1, dpdt relay 2, magnetic valve 3, pull-up resistor 4 and external power source V
CCForm.
Wherein, described magnetic valve 3 the two poles of the earth of being connected thermocouple 1 form first loop; And described magnetic valve 3 also meets external power source V by a pull-up resistor 4
CC, and by described relay 2 ground connection, form second loop.
First loop that is made of thermocouple 1 and magnetic valve 3 mainly acts on the adhesive of air valve: when fire is being beaten, under the electric current I a effect that thermocouple produces, can make magnetic valve keep the state of adhesive, the electric current of maintenance magnetic valve attracting state is about 100mA.
And by external power source V
CC, second loop that constitutes of pull-up resistor 4, magnetic valve 3, relay 2 then mainly acts on the cut-out of air valve: when needs cut off magnetic valve, send a control signal to relay 2, disconnect after making its adhesive in a flash, described second loop gets final product closed conducting, to magnetic valve 3 inject one with the opposite electric current I v2 of electric current I a direction, make electromagnetic field intensity moment of magnetic valve 3 inside reduce, thereby be cut off.
During specific implementation, relay remains on 50-100ms 2 pickup times, after the second loop conducting, and power supply V
CC2 electric current return paths are arranged, one is the electric current I v1 by magnetic valve 3, another one is the electric current I v2 by thermocouple 1, because the impedance of thermocouple 1 and magnetic valve 3 can think equal, can think Iv1=Iv2, so, 2 times of the electric current I a that the electric current I v2 in second loop produces greater than thermocouple, Iv1+Iv1＞2Ia gets final product.
Because what adopt in the present embodiment is external power source, thus select the flexibility of components and parts in the circuit quite big, as long as guarantee the electric current that the reversing the current of external power source generation produces greater than thermocouple, external power source V
CCVoltage, relay 2, resistance 4 can arbitrarily arrange in pairs or groups.
What deserves to be explained is, be to utilize relay to control reversing the current in the present embodiment, and in fact, any one switching device can be used for realizing the control to reversing the current.
The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (6)
1, a kind of air valve cut-off control circuit that is used for gas-cooker includes thermocouple, switching device and magnetic valve, it is characterized in that:
The two poles of the earth that described magnetic valve is connected thermocouple form first loop; And described magnetic valve also connects external power source and by described switching device ground connection, forms second a reverse loop by a pull-up resistor.
2, the air valve cut-off control circuit that is used for gas-cooker as claimed in claim 1 is characterized in that, described switching device is a relay.
3, a kind of air valve cut-off control method that is used for air valve cut-off control circuit as claimed in claim 1 is characterized in that this method may further comprise the steps:
Keep at magnetic valve controlling the described second loop conducting under the state of adhesive, inject reversing the current, cut off magnetic valve to described magnetic valve.
4, air valve cut-off control method as claimed in claim 3 is characterized in that, by described switching device being applied a control signal, makes the switching device adhesive control the described second loop conducting.
5, air valve cut-off control method as claimed in claim 4 is characterized in that, be 50-100ms the pickup time of described switching device.
6, as each described air valve cut-off control method among the claim 3-5, it is characterized in that described switching device is a relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101417083A CN101354148A (en) | 2008-08-26 | 2008-08-26 | Control circuit and method of air valve cut-off for gas combustion range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101417083A CN101354148A (en) | 2008-08-26 | 2008-08-26 | Control circuit and method of air valve cut-off for gas combustion range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101354148A true CN101354148A (en) | 2009-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101417083A Pending CN101354148A (en) | 2008-08-26 | 2008-08-26 | Control circuit and method of air valve cut-off for gas combustion range |
Country Status (1)
| Country | Link |
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| CN (1) | CN101354148A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102906503A (en) * | 2010-05-27 | 2013-01-30 | 伊莱克斯家用产品股份有限公司 | Gas-fired kitchen appliance |
-
2008
- 2008-08-26 CN CNA2008101417083A patent/CN101354148A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102906503A (en) * | 2010-05-27 | 2013-01-30 | 伊莱克斯家用产品股份有限公司 | Gas-fired kitchen appliance |
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Open date: 20090128 |