CN2405130Y - Control device for detecting flame out and then reignition, and alarming - Google Patents
Control device for detecting flame out and then reignition, and alarming Download PDFInfo
- Publication number
- CN2405130Y CN2405130Y CN 99246211 CN99246211U CN2405130Y CN 2405130 Y CN2405130 Y CN 2405130Y CN 99246211 CN99246211 CN 99246211 CN 99246211 U CN99246211 U CN 99246211U CN 2405130 Y CN2405130 Y CN 2405130Y
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- CN
- China
- Prior art keywords
- circuit
- kitchen range
- flame
- lighted
- fire
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Abstract
The utility model relates to a flame extinction detection, reignition and alarm control device for a stove. The utility model comprises a burner, a flame sensor, a detecting circuit, a discrimination circuit, a reignition circuit and a time delay alarm circuit, wherein, the detecting circuit is composed of an alternating current oscillation circuit and a direct current identification circuit, the alternating current oscillation circuit detects the flame ion current, the direct current identification circuit detects leakage current, and a voltage comparator is connected in parallel with the output terminals of the alternating current oscillation circuit and the direct current identification circuit so as to form the discrimination circuit which discriminates whether the flame burns. The utility model has the advantages of high detecting sensitivity, quick and reliable reignition function, audible alarm function, and further enhanced safety performance of a gas range.
Description
The utility model relates to the flame-out igniter again of a kind of combustion gas tool, a kind of flame-out igniting and alarm again of gas kitchen ranges.
The misfire detection circuit of existing gas-cooker, the employing dc detection circuit that has, the employing AC detection circuit that has uses all defectiveness of this testing circuit of two kinds of discovery by reality.Since the flame internal resistance of combustion gas up to 15 megaohms about, high like this internal resistance, require the flame probe of high insulation, and the environment for use condition of kitchen range, particularly humidity is high and come and go, and makes decreasing insulating, and leakage current will be above flame current, it is malfunctioning that dc detection circuit is judged, can automatic ignition when flame-out; For AC detection circuit, when insulaion resistance is reduced near the flame internal resistance, existing AC detection circuit just can not be distinguished flame current or leakage current, as not adding the alternating current-direct current judging circuit, can cause the malfunctioning fault of the judgement that causes as dc detection circuit, can not automatic ignition when phenomenon of the failure still is flame-out back or sparking.The combustion gas tool automatic ignition device that CN2325684Y proposes still can not address the aforementioned drawbacks.Therefore the many gas kitchen ranges misfire detection that propose at present reach applying that igniter all can not be real again.
The purpose of this utility model is to reach the existing defective of igniter again at above-mentioned combustion gas tool misfire detection, design a kind of device that can distinguish flame current or leakage current, make flame detection sensitivity height, accurately and reliably, prevent misoperation, safe and reliable for guaranteeing, also the delayed alarm function to be arranged.
The design that the utility model adopted is: the kitchen range misfire detection is lighted a fire and alarm controller again, it comprises burner, flame sensor, testing circuit, judging circuit, firing circuit and delayed alarm circuit again, it is characterized in that: testing circuit is made up of the ac oscillator circuit of flame detection gas current and the direct current identification circuit that detects leakage current; The output composition flame that one voltage comparator is connected to ac oscillator circuit and direct current identification circuit is firing whether judging circuit.
The remarkable advantage of above-mentioned design is, has adopted the AC and DC identification circuit in the controller, and flame ion detects the characteristic of utilizing the flame ion unilateal conduction, adopts the detection method that exchanges vibration; Whether normally and leakage current is the characteristic of bi directional conductibility, and the method for utilizing direct current to detect is shunted leakage current to come out from the flame ion electric current, imports judging circuit respectively, thereby reach flame detection gas current purpose.As have leakage current, and the fault of not striking sparks in the time of then can not occurring striking sparks or after flame-out, after kitchen range were lighted, flame can dryout dirt or the water vapour around the ion inductive needle, gets rid of the leakage current fault automatically.And recognition capability and detection sensitivity are all very high.Extinguished as flame, the electronic switch demand working of then powering, high voltage arc is lighted up to kitchen range.Designed delayed alarm circuit in the controller, within 5 seconds that the kitchen range high voltage arc does not become, can send chimes of doom, notice user's gas kitchen range has fault, guarantees user's safety.
Fig. 1 designs frame principle figure for the utility model.
Fig. 2 is the embodiment circuit diagram.
Fig. 3 is three kitchen range circuit block diagrams.
Fig. 4 is a four eyed kitchen range circuit block diagram.
Circuit block diagram of the present utility model as shown in Figure 1, left and right sides burner adopts a cover alternating current-direct current testing circuit separately, be connected with common oscillating circuit, high-voltage generator circuit, delay circuit, audible alarm circuit by electronic circuit, constitute flame-out an igniting or a delayed alarm controller again.
Testing circuit (1) is made up of the ac oscillator circuit of flame detection gas current and the direct current identification circuit of detection leakage current.Ac oscillator circuit is by triode V
3, diode D
5, D
6, D
7, transformer B
4And resistance R
5Form triode V
3, resistance R
5With transformer B
4The elementary self-maintained circuit that is connected into, ion probe A and transformer B
4A secondary end link to each other diode D
6, D
7With B
4Secondary C end is in parallel.The direct current identification circuit is by resistance R
6, R
7, R
8, R
9And capacitor C
4Form resistance R
7, R
8And R
9Be connected into divider, capacitor C
4An end and B
4C end and resistance R
6, R
7An end parallel connection.
The output composition flame that one voltage comparator is connected to ac oscillator circuit and direct current identification circuit is firing whether judging circuit (2), determines opening or closing of electronic switch.Described judging circuit (2) is by IC
1And capacitor C
3Be connected into voltage comparator, its input and resistance R
6Join output and resistance R
3Join.The IC of present embodiment
1Adopt LM393.
Firing circuit comprises power supply electronic switch (3), oscillating circuit (4) and high-pressure generating circuit (5) again.The power supply electronic switch is by triode V
2And resistance R
3Form.Oscillating circuit (4) is by triode V
1, diode D
4, resistance R
2With transformer B
3Form.High pressure generator is by diode D
1, D
2, D
3, capacitor C
1, C
2Controllable silicon T
1With transformer B
1, B
2Form.
Delay circuit (6) is by triode V
5, diode D
8, D
12, resistance R
11, R
12And capacitor C
5, C
8Form.The input of delay circuit links to each other with the output of power supply electronic switch, and its output and warning circuit join.Its time constant is by R
12And C
8Value and decide, this circuit delay time is 5 seconds.
Warning circuit (7) is by triode V
4, resistance R
10Form acoustic alarm with electromagnetic buzzer Y.
As shown in Figure 1 and Figure 2 the eyes kitchen range have respectively two the cover testing circuit, judging circuit and power supply electronic switches with one again firing circuit link to each other with warning circuit.Fig. 3 represent three kitchen range have respectively three the cover testing circuit, judging circuit and power supply electronic switches with one again firing circuit link to each other with warning circuit.Fig. 4 represent testing circuit, judging circuit and power supply electronic switch that the four eyed kitchen range have quadruplet respectively with one again firing circuit link to each other with warning circuit.
The course of work of embodiment is described below in conjunction with accompanying drawing 1,2.
K closes a switch
1(or K
2) circuit connection power supply, ac oscillator circuit work, oscillator signal is through B
5(or B
4) the elementary time utmost point ion probe B (or A) of being coupled to, if this moment, gas valve was opened, high voltage arc, kitchen range are lighted, and when the signal of probe B (or A) is timing, flame ion is absorbed by probe B (or A), and secondary other end D (or C) produces negative polarity air pressure.Make capacitor C
7(or C
4) fill negative voltage, through R
16(or R
6) add to comparator IC
2(or IC
1) 2 pin, because of 2 pin are end of oppisite phase, so IC
2(or IC
1) 1 pin be high potential.Switching tube V
6(or V
2) the base stage reverse bias.Electronic switch disconnects, and firing circuit and delayed alarm circuit are not worked again.
If missing of ignition or flame-out midway, impedance is infinitely great, B between probe and the ground (kitchen range chassis)
5(or B
4) secondary no-voltage output, this moment is by resistance R
18, R
19(or R
8, R
9) divider formed is through C
7, R
16, R
17(or C
4, R
6, R
7To IC
2(or IC
1) 2 pin conveying+0.9V about voltage, IC
2(or IC
1) 1 pin be electronegative potential.R
13(or R
3) V is provided
6(or V
2) forward bias, electronic switch (3) is opened.Positive supply is through V
6(or V
2) the e utmost point flow to the C utmost point, oscillating circuit (4) starting of oscillation.B
3Pulse voltage through D
2, D
3After the rectification, by B
1, B
2Elementary to C
1Charging, meanwhile R
1To C
2C is worked as in charging
2On the voltage that filled reach D
1Breakdown voltage the time, controllable silicon T
1Conducting, C
1By controllable silicon T
1Discharge, discharge voltage is at B
2, B
1The above electrions of 10,000 volts of secondary generations, the igniting pin produces the spark ignition kitchen range.
As misfire, when striking sparks continuously, positive supply is through R
12To C
8Charging, voltage is charged to about 0.7V after 5 seconds, D
12Conducting, V
5The forward bias conducting.V
5The colelctor electrode electronegative potential is through R
10V is provided
4Forward bias voltage, V
4Colelctor electrode high potential, electromagnetic buzzer Y get the electric chimes of doom that sends.
If when dirt, steam being arranged or the metal object short circuit is arranged between detection A (or B) and ground (kitchen range chassis), leakage current that is produced or short circuit current are at B
5(or B
4) secondary D (or C) point on the voltage that produces be alternating voltage, alternating voltage is through C
7(or C
4) shorted to earth.C
7(or C
4) no negative voltage charging, by R
18, R
19(or R
8, R
9) dividing potential drop produces+0.9V voltage is through R
17, R
16(or R
7, R
6) add to IC
2(or IC
1) 2 pin, IC
2(or IC
1) 1 pin low-voltage, V
6(or V
2) conducting, carry out high voltage arc.Thereby come with unidirectional flame ion electric current difference, avoided mistake to survey.
Claims (7)
1. the kitchen range misfire detection is lighted a fire and alarm controller again, it comprises burner, flame sensor, testing circuit, judging circuit, firing circuit and delayed alarm circuit again, it is characterized in that described testing circuit is made up of the ac oscillator circuit of flame detection gas current and the direct current identification circuit that detects leakage current; The output composition flame that one voltage comparator is connected to ac oscillator circuit and direct current identification circuit is firing whether judging circuit.
2. kitchen range misfire detection as claimed in claim 1 is lighted a fire and alarm controller again, it is characterized in that ac oscillator circuit is by triode V
3, diode D
5, D
6, D
7, transformer B
4And resistance R
5Form triode V
3, resistance R
5With transformer B
4The elementary self-maintained circuit that is connected into, ion probe A and transformer B
4A secondary end link to each other diode D
6, D
7With B
4Secondary C end is in parallel.
3. kitchen range misfire detection as claimed in claim 1 is lighted a fire and alarm controller again, it is characterized in that the direct current identification circuit is by resistance R
6, R
7, R
8, R
9And capacitor C
4Form resistance R
7, R
8And R
9Be connected into divider, capacitor C
4An end and B
4C end and resistance R
6, R
7An end parallel connection.
4. kitchen range misfire detection as claimed in claim 1 is lighted a fire and alarm controller again, it is characterized in that again firing circuit comprises power supply electronic switch (3), oscillating circuit (4) and high-pressure generating circuit (5).
5. kitchen range misfire detection as claimed in claim 1 is lighted a fire and alarm controller again, it is characterized in that the eyes kitchen range have respectively two the cover testing circuit, judging circuit and power supply electronic switches with one again firing circuit link to each other with warning circuit.
6. kitchen range misfire detection as claimed in claim 1 is lighted a fire and alarm controller again, it is characterized in that three kitchen range have respectively three the cover testing circuit, judging circuit and power supply electronic switches with one again firing circuit link to each other with warning circuit.
7. kitchen range misfire detection as claimed in claim 1 is lighted a fire and alarm controller again, it is characterized in that testing circuit, judging circuit and power supply electronic switch that the four eyed kitchen range have quadruplet respectively with one again firing circuit link to each other with warning circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99246211 CN2405130Y (en) | 1999-09-28 | 1999-09-28 | Control device for detecting flame out and then reignition, and alarming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99246211 CN2405130Y (en) | 1999-09-28 | 1999-09-28 | Control device for detecting flame out and then reignition, and alarming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2405130Y true CN2405130Y (en) | 2000-11-08 |
Family
ID=34031885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99246211 Expired - Fee Related CN2405130Y (en) | 1999-09-28 | 1999-09-28 | Control device for detecting flame out and then reignition, and alarming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2405130Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100420901C (en) * | 2006-07-21 | 2008-09-24 | 宁波方太厨具有限公司 | Gas range with automatic reigniting function after accident fire cut-off |
| CN111878859A (en) * | 2020-07-20 | 2020-11-03 | 浙江帅康电气股份有限公司 | Smoke stove linkage control system and control method thereof |
-
1999
- 1999-09-28 CN CN 99246211 patent/CN2405130Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100420901C (en) * | 2006-07-21 | 2008-09-24 | 宁波方太厨具有限公司 | Gas range with automatic reigniting function after accident fire cut-off |
| CN111878859A (en) * | 2020-07-20 | 2020-11-03 | 浙江帅康电气股份有限公司 | Smoke stove linkage control system and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |