CN204554903U - A kind of control circuit flame-out for kitchen range and kitchen range - Google Patents
A kind of control circuit flame-out for kitchen range and kitchen range Download PDFInfo
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- CN204554903U CN204554903U CN201520151759.XU CN201520151759U CN204554903U CN 204554903 U CN204554903 U CN 204554903U CN 201520151759 U CN201520151759 U CN 201520151759U CN 204554903 U CN204554903 U CN 204554903U
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- flame
- kitchen range
- discharge switch
- power supply
- control circuit
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- 230000005672 electromagnetic field Effects 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 18
- 239000007789 gas Substances 0.000 description 14
- 239000000567 combustion gas Substances 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 229910000521 B alloy Inorganic materials 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
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- Control Of Combustion (AREA)
Abstract
The utility model discloses a kind of control circuit flame-out for kitchen range and kitchen range, wherein control circuit comprises the gas electromagnetic valve with control coil, and the thermocouple for making described control coil generate an electromagnetic field, it is characterized in that, also comprise power supply circuits and be controlled by the discharge switch of flame-out instruction; Described discharge switch is connected between power supply circuits and main control coil, to eliminate the electromagnetic field of control coil.The setting of discharge switch of the present utility model avoids the positive closing of For Thermocouple Circuit, makes the folding of magnetic valve sensitiveer, avoids maloperation.
Description
Technical field
The utility model relates to a kind of control circuit, particularly relates to a kind of control circuit flame-out for kitchen range, also relates to the kitchen range adopting this circuit.
Background technology
Gas kitchen ranges is a kind of important kitchen utensils of family's indispensability, the switch of kitchen range combustion gas is generally magnetic valve, magnetic valve is an electromagnet, magnetic field is had to produce after energising, the connecting rod of energy adhesive spool, the air admission hole of burnt gas valve is opened, and the effect by own spring force after dead electricity can automatically reset again, seal combustion gas pore, ensure that combustion gas can not be excessive.
In order to can shut electromagnetic valve immediately after making kitchen range flame-out suddenly, prevent combustion gas excessive, the burner of kitchen range can be provided with thermocouple.Thermocouple is the B alloy wire that two different materials weld together, and when the heating one end other end cools, can produce electromotive force (voltage) between two B alloy wires.The size producing electromotive force is decided by material character and the heating-up temperature of B alloy wire.When flame heats, the electromotive force that thermocouple two ends produce is supplied to magnetic valve, and magnetic valve obtains electric maintenance adhesive, maintains the conducting of combustion gas; When meeting accident flame-out, the electromotive force at thermocouple two ends disappears, and fuel gas path is blocked in the release of magnetic valve dead electricity, prevents combustion gas excessive.
Integrated kitchen range is a kind of gas kitchen ranges integrating the several functions such as range hood, gas-cooker, disinfection cabinet, storage cabinet, and it has advantages such as saving space, smoke pumping are effective, low energy environmental protection, is widely used.
But also there is a fatal defect in integrated kitchen range, namely the blower fan of range hood is arranged on below the kitchen range top, oil smoke draws downward suction by blower fan, if the suction air volume of range hood is excessive or due to outside environmental elements cause flame to be strengthened suddenly time, the flame of gas-cooker can be inhaled in range hood, the downward suction of flame can cause whole integrated kitchen range to burn, and there is disaster hidden-trouble.
Therefore, firewall protection device is all provided with in most of integrated kitchen range.Firewall protection device comprises the temperature sensor be arranged in kitchen range air duct of range hood, and temperature sensor is electrically connected with main control chip, and the flame-out instruction that main control chip exports controls the gauge tap in For Thermocouple Circuit.When entering when there being naked light that in air channel or air channel, temperature is too high, the main control chip be electrically connected with the temperature sensor in air channel can export flame-out instruction, flame-out instruction disconnects gauge tap, For Thermocouple Circuit is disconnected, the magnetic valve controlling combustion gas gas circuit loses magnetism, magnetic valve ejects fuel gas shutoff, prevents the generation of fire.
Existing gauge tap is an electromagnetic relay, and after receiving flame-out instruction, electromagnetic relay disconnects by force thus disconnects For Thermocouple Circuit.Electromagnetic relay is after repeatedly opening and closing, and contact internal resistance can increase a lot, and the electromotive force causing thermocouple to produce is not enough to the adhesive maintaining main solenoid valve, thus causes kitchen range normally to use.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of safe and reliable kitchen range flameout control circuit.
For achieving the above object, the utility model provides following technical scheme:
For the control circuit that kitchen range are flame-out, comprise the gas electromagnetic valve with control coil, and the thermocouple for making described control coil generate an electromagnetic field, also comprise power supply circuits and be controlled by the discharge switch of flame-out instruction;
Described discharge switch is connected between power supply circuits and main control coil, to eliminate the electromagnetic field of control coil.
In the utility model the electromagnetic field of control coil refer to by thermocouple power produce electromagnetic field.
Described power supply circuits comprise power supply and storage capacitor, and the positive pole of described storage capacitor is connected with power supply by a current-limiting resistance, minus earth;
One end of discharge switch is connected with the positive pole of storage capacitor, the negative pole of another termination control coil of discharge switch.
In the utility model, the positive pole of control coil refers to one end that main control coil is connected with thermocouple positive pole.
Under the metering function of current-limiting resistance, the electric current that power supply produces is less, is not enough to make control coil produce enough magnetic field to offset the magnetic field caused by thermocouple.By arranging storage capacitor, when discharge switch disconnects, storage capacitor charges, when discharge switch conducting, storage capacitor discharges, and forms larger discharge current, and then make control coil produce enough magnetic field, make closed electromagnetic valve with the magnetic field of offsetting caused by thermocouple, block gas pipeline.
As preferably, described discharge switch comprises N-channel MOS pipe, and the grid of described metal-oxide-semiconductor receives flame-out instruction as the control end of discharge switch, drains to be connected with the positive pole of described storage capacitor, and source electrode is connected with described control coil.
Metal-oxide-semiconductor is a device controlling electric current by changing voltage, and input impedance is high, uses metal-oxide-semiconductor to do switching tube, its input impedance is up to 100M Ω, and this can not produce pressure drop to pumping signal, as long as there is a point voltage just can drive, and metal-oxide-semiconductor switching speed is fast, there is not second breakdown.
During practical application, discharge switch also adopts the metal-oxide-semiconductor of P raceway groove to realize, and the connection of each pin accordingly also carries out adaptive change.
Flame-out instruction is generally data signal, and driving force is limited, and for improving its driving force, further preferably, described discharge switch also comprises triode;
The colelctor electrode of triode is connected with the grid of described metal-oxide-semiconductor, and is connected with power supply by pull-up resistor;
The grounded emitter of triode, and connected by biasing resistor between emitter and collector;
The base stage of triode is by the controlled end reception flame-out instruction of current-limiting resistance as discharge switch.
As preferably, the described control circuit flame-out for kitchen range is also provided with protection electric capacity, and the positive pole of protection electric capacity connects power supply, minus earth;
The positive pole of protection electric capacity is also connected with the grid of metal-oxide-semiconductor by described pull-up resistor.
When the power is turned on, power supply gives protection capacitor charging, when power cut-off; protection capacitor discharge makes discharge switch conducting, and then forces solenoid valve shuts gas pipeline, makes gas combustion range flameout; prevent from causing safety problem because of power cut-off, greatly reduce the probability of happening of security incident.
The invention also discloses a kind of kitchen range, comprise the sensor for gathering kitchen range wind duct temperature, for sensor-lodging to send the main control chip of flame-out instruction, and the kitchen range flameout control circuit of gas electromagnetic valve is closed according to flame-out instruction, described kitchen range flameout control circuit is the above-mentioned control circuit flame-out for kitchen range.
Compared with prior art, the beneficial effects of the utility model are as follows:
The setting of discharge switch of the present utility model avoids the positive closing of For Thermocouple Circuit, makes the folding of magnetic valve sensitiveer, avoids maloperation.
Accompanying drawing explanation
Fig. 1 is the control circuit figure that the utility model stops working for kitchen range.
Detailed description of the invention
In order to further set forth the technological means and effect thereof that the utility model takes, below in conjunction with preferred embodiment and accompanying drawing thereof, the utility model is described in further detail.
The control circuit flame-out for kitchen range of the present embodiment, as shown in Figure 1, comprise and there is control coil gas electromagnetic valve (i.e. valve body magnetic valve in figure), and the thermocouple for making control coil generate an electromagnetic field, when thermocouple is heated, thermocouple produces electromotive force, for main control coil power supply produces magnetic field, make gas electromagnetic valve adhesive, combustion gas gas circuit is opened, thus maintains the normal combustion of kitchen range flame.
In the present embodiment, thermocouple has two pins, i.e. positive pole 2 and negative pole 1.For control coil, using 1 end as positive pole, 2 ends are as negative pole.
Also comprise power supply circuits and be controlled by the discharge switch of flame-out instruction; Discharge switch is connected between power supply circuits and control coil, to eliminate the magnetic field of control coil.
Power supply circuits comprise power supply (12V) and storage capacitor C20, and the positive pole of storage capacitor C20 is connected with power supply by a current-limiting resistance R19 (being 2K Ω in the present embodiment), minus earth.
In the present embodiment, power supply circuits are using the positive and negative electrode of storage capacitor C20 as output (feeder ear) for control coil is powered, and wherein positive pole is connected with the negative pole of control coil by discharge switch, and negative pole is directly connected with the positive pole of control coil.
One end of discharge switch is connected with the positive pole of storage capacitor, the negative pole of another termination control coil.
In the present embodiment, discharge switch comprises N-channel MOS pipe Q7, and the grid of metal-oxide-semiconductor Q7 receives flame-out instruction as the control end of discharge switch, drains to be connected with the positive pole of storage capacitor C20, and source electrode is connected with the negative pole of main control coil.
A parasitic diode (Schottky diode) is integrated with, to improve the switching speed of metal-oxide-semiconductor between the source electrode of the N-channel MOS pipe adopted in the present embodiment and drain electrode.
Because flame-out instruction is data signal, driving force is limited, and discharge switch is also provided with triode Q3, and the colelctor electrode of triode is connected with the grid of metal-oxide-semiconductor Q7, and is connected with power supply by pull-up resistor R24 (being 2K Ω in the present embodiment); Grounded emitter, and connected by biasing resistor R21 (being 100K Ω in the present embodiment) between emitter and collector; Base stage connects the controlled end reception flame-out instruction of a current-limiting resistance R25 (being 10K Ω in the present embodiment) as discharge switch.
For avoiding reversal connection, anti-reverse diode D10 (IN4007) is in series with between power supply and current-limiting resistance R19, power supply and pull-up resistor R24 are directly in series with anti-reverse diode D1 (IN4007), and anti-reverse diode D10 is connected with power supply with D1 positive pole.
When power cut-off in power supply circuits, even if after discharge switch receives flame-out instruction, control coil also cannot produce the magnetic field of offsetting main control coil.For avoiding occurring the therefore security incident caused, be also provided with protection electric capacity C4 in the flameout control circuit of the present embodiment, the positive pole of protection electric capacity C4 connects power supply, minus earth; The positive pole of protection electric capacity is also connected with the grid of metal-oxide-semiconductor Q7 by pull-up resistor R24.
Kitchen range in the present embodiment, comprise the sensor for gathering kitchen range wind duct temperature, for sensor-lodging to send the main control chip (for single-chip microcomputer in the present embodiment) of flame-out instruction, and close the kitchen range flameout control circuit of gas electromagnetic valve according to flame-out instruction.
The kitchen range of the present embodiment principle of stopping working is as follows:
When kitchen range normally work, the flame-out instruction that main control chip sends is high level, now triode Q3 conducting, the grid of metal-oxide-semiconductor Q7 is low level, metal-oxide-semiconductor Q7 ends, main power supply circuits and main control coil separated, and thermocouple is separately main control coil power supply, now magnetic valve adhesive, gas-cooker normally works.
When the air channel having naked light to enter kitchen range, or when other reasons causes kitchen range wind duct temperature too high, temperature sensor in air channel by signal transmission to main control chip, the flame-out instruction that main control chip sends is low level, now triode Q3 ends, the input high level of metal-oxide-semiconductor Q7 grid, make metal-oxide-semiconductor Q7 conducting, the electromotive force of offsetting control coil operating voltage is formed at the two ends of control coil, control coil is lost magnetism, release closed electromagnetic valve gas circuit, extinguishes kitchen range in time, prevents the generation of fire.
The foregoing is only better implementation example of the present utility model, be not limited to the utility model, all within the utility model spirit and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1., for the control circuit that kitchen range are flame-out, comprise the gas electromagnetic valve with control coil, and the thermocouple for making described control coil generate an electromagnetic field, it is characterized in that, also comprise power supply circuits and be controlled by the discharge switch of flame-out instruction;
Described discharge switch is connected between power supply circuits and main control coil, to eliminate the electromagnetic field of control coil.
2. the control circuit flame-out for kitchen range according to claim 1, it is characterized in that, described power supply circuits comprise power supply and storage capacitor, and the positive pole of described storage capacitor is connected with power supply by a current-limiting resistance, minus earth;
One end of discharge switch is connected with the positive pole of storage capacitor, the negative pole of another termination control coil of discharge switch.
3. the control circuit flame-out for kitchen range according to claim 2, it is characterized in that, described discharge switch comprises N-channel MOS pipe, the grid of described metal-oxide-semiconductor receives flame-out instruction as the control end of discharge switch, drain electrode is connected with the positive pole of described storage capacitor, and source electrode is connected with described control coil.
4. the control circuit flame-out for kitchen range according to claim 3, it is characterized in that, described discharge switch also comprises triode;
The colelctor electrode of triode is connected with the grid of described metal-oxide-semiconductor, and is connected with power supply by pull-up resistor;
The grounded emitter of triode, and connected by biasing resistor between emitter and collector;
The base stage of triode is by the controlled end reception flame-out instruction of current-limiting resistance as discharge switch.
5. the control circuit flame-out for kitchen range according to claim 4, is characterized in that, be also provided with protection electric capacity, and the positive pole of protection electric capacity connects power supply, minus earth;
The positive pole of protection electric capacity is also connected with the grid of metal-oxide-semiconductor by described pull-up resistor.
6. kitchen range, comprise the sensor for gathering kitchen range wind duct temperature, for sensor-lodging to send the main control chip of flame-out instruction, and the kitchen range flameout control circuit of gas electromagnetic valve is closed according to flame-out instruction, it is characterized in that, for the kitchen range flame-out control circuit of described kitchen range flameout control circuit according to any one of Claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520151759.XU CN204554903U (en) | 2015-03-18 | 2015-03-18 | A kind of control circuit flame-out for kitchen range and kitchen range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520151759.XU CN204554903U (en) | 2015-03-18 | 2015-03-18 | A kind of control circuit flame-out for kitchen range and kitchen range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204554903U true CN204554903U (en) | 2015-08-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520151759.XU Withdrawn - After Issue CN204554903U (en) | 2015-03-18 | 2015-03-18 | A kind of control circuit flame-out for kitchen range and kitchen range |
Country Status (1)
| Country | Link |
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| CN (1) | CN204554903U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728874A (en) * | 2015-03-18 | 2015-06-24 | 浙江新涛电子科技股份有限公司 | Control circuit for flameout of cooking utensils and cooking utensil |
-
2015
- 2015-03-18 CN CN201520151759.XU patent/CN204554903U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728874A (en) * | 2015-03-18 | 2015-06-24 | 浙江新涛电子科技股份有限公司 | Control circuit for flameout of cooking utensils and cooking utensil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 312500 Xinchang County, Zhejiang Province, Tao Road, No. 68, No. Patentee after: ZHEJIANG XINTAO ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 312500 Xinchang County, Zhejiang Province, Tao Road, No. 68, No. Patentee before: ZHEJIANG XINTAO ELECTRONIC TECHNOLOGY Co.,Ltd. |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150812 Effective date of abandoning: 20240402 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150812 Effective date of abandoning: 20240402 |