CN2432474Y - Safety system device for gas stove - Google Patents

Abstract

The utility model relates to a safety system device for a gas stove, which comprises a gas flow sensor, a set of furnace head flame temperature sensing switches, two linking switches arranged on each ignition knob shaft of a gas stove, a smoke sensor, a time limitation setting circuit which can automatically turn off gas, a gas supply valve which can be manually operated and can be automatically closed, a set of indicating lamp groups for identifying abnormal reasons, a sound warning device, a microprocessor, and a DC supplying device. The device can automatically detect whether the gas is leaked, whether flames are normally combusted when a furnace head is used, whether excessive smoke is generated near the circumambience of a stove, etc., can automatically close gas sources in time, and can automatically switch off electricity after a drawing fan discharges leaky gas to ensure safety.

Description

The device of gas cooker security system

The utility model relates to a kind of device of gas cooker security system.

The coal gas stove and accessory is an indispensable basic cooking apparatus in modern people's daily life, yet when burning is used, its security can not be neglected really, because of coal gas is heavier than air, and has toxicity, incendivity and explosivity, often because stove and accessory is too outmoded, pipeline suffers corrosion failure, or part joint loosening and cause the leakage of coal gas in addition, or in use the thing that boils that overflowed of flame spills and unusual situation such as extinguishes and fail to be found and in time close the coal gas source, cause a large amount of coal gas streams when indoor, then very easily take place because all unfortunate accidents that produces that leak of coal gas, and in fact this type of unfortunate event takes place really often, and causes making people's life, property suffers great loss.

Main purpose of the present utility model provides a kind of device of gas cooker security system, it is to be the center with the microelectronics processor, automatically operate the security system of coal gas stove and accessory, can before use or predict coal gas in using and have or not leakage, burner flame has or not normal ignition, or combustion flame has the accident of denying to be forced to extinguish in boiling, or since the food in the pot because people's carelessness allows pot interior food boil Jiao, and before catching fire a large amount of smog or the like that produces, all can in time close the coal gas source automatically, and be rotated further air exhauster, so that the coal gas and the smog that flow are discharged without, to constitute safe condition.

Secondary objective of the present utility model provides a kind of device of gas cooker security system, running operation by air exhauster and houselights, when the stove and accessory pipeline had flow of gas, then air exhauster was immediately after confirming flow of gas, and the microelectronics processor is promptly from moving the operation of exhausting running.If finish when stove and accessory boils under normal condition, though close the jet on the stove and accessory, but, this moment, air exhauster also was subjected to the domination of microelectronics processor, can allow it continue to do exhausting work, just stop after remaining hot gas or smog are got rid of fully around the stove and accessory, this postpones dwell time length all can set processing by the microelectronics processor.

Another purpose of the present utility model provides a kind of device of gas cooker security system, by closing setting apparatus in limited time, can not keep for a long time other grade of stove the cooking stove end user and to bide one's time, can set a suitable limiting time, make cooking stove can close the gas pipe main valve automatically when the time comes, and operate other necessary security measures.

The utility model is achieved in that it mainly comprises: as each component controls center and the connected microprocessor of difference, one rectification reducing transformer of supplying DC power source is aided with the gas pipe main valve that flame temperature inductive switch, a buzzer of a flow of gas sensor and signal generator, a smoke sensing circuit, a plurality of (each stove first), three warning indicator lamps and are installed on the gas main, the manually open and close electric screwed pipe of supply coal gas is operated its keying and forms; Wherein the flow of gas sensor is installed in the downstream of the gas pipe main valve on the above-mentioned gas main and becomes one, and the flame temperature inductive switch then is installed in by each burner; One flow of gas sensor, it is not connected and output signal with a leak supervision circuit before using coal gas, then is connected and output signal with a no flame monitoring circuit after using coal gas.Wherein output signal is handled and produced to microprocessor after obtaining abnormal signals such as leakage, no flame or smog, and buzzer is the sounding warning when obtaining microprocessor and send output signal after confirming in delayed 40 seconds here; Three warning indicator lamps are lighted the indicator lamp of this fault when receiving processing center respectively and send the unusual output signal of the corresponding circuit that postponed through 40 seconds here, the reason that takes place with display abnormality; Manually the open and close electric screwed pipe operation gas pipe main valve of cutting out automatically shuts down coal gas after the signal of microprocessor output through postponing in 40 seconds drives a voltage receiving.

Wherein said leak supervision circuit, include: one is contained in the flow of gas sensor that gas main is positioned at gas pipe main valve downstream, be installed in the coupled switch of a plurality of (one of each burner installing) series connection on the axostylus axostyle of ignition knob of each burner, the switch of this switch and ignition knob is an interlock, and this group switch is not the series connection on-state when using stove and accessory, and be connected with above-mentioned microprocessor, can when unusual, output signal to microprocessor through this series circuit, automatically close coal gas after the delayed affirmation, send the audible and visual alarm signal.

Wherein said no flame monitoring circuit, include: the flame temperature inductive switch of a plurality of parallel connections, this inductive switch is one of the other installing of each burner, it is on-state when normal temperature, automatic tripping is dissengaged positions during high temperature, and the coupled switch of a plurality of parallel connections, and this coupled switch is installed in respectively on the axostylus axostyle of ignition knob switch of each burner, each coupled switch all is connected with corresponding thermal switch, and is subjected to the interlock of rotary switch; When stove and accessory does not use, this group coupled switch all is dissengaged positions, as long as during the igniting of arbitrary burner, because of being the cause of parallel connection, so this circuit can be connected, but because thermal switch Yin Wendu raises and tripping, still no signal is exported, but when the flame accident is extinguished, then reduce because of end flue temperature, the temperature detect switch (TDS) connection that resets, abnormal signal is delivered to the delayed affirmation of microprocessor immediately and drives closes coal gas, sends the audible and visual alarm signal.

Wherein said smoke sensing circuit includes: at least one is contained near the smoke sensing device of the periphery of exhaust blower, and the output of this smoke sensing device is communicated with microprocessor; When sensing has smog, directly transmit signal and be input into microprocessor, the audible and visual alarm signal is sent in delayed affirmation and drive and close coal gas.

The gas pipe main valve that wherein said manually open and close and electromagnetism are closed, include: a valve body, a hand that is located at valve stem tip is pressed the button of unlatching, a push-button reset spring, the lever of one a manual X button and an interlock, and one cooperate and vertically arranged electric screwed pipe with button head; When manually opened gas valve, press the button head, electric screwed pipe front end one wedge trip unshakable in one's determination can be entrapped in by the elastic force of trip back-moving spring in the mortise on the button head, when electric screwed pipe is imported a voltage by microprocessor, electromagnetic force can be handled iron core and retreat, make trip deviate from mortise, the spring so button head makes progress and automatic-closing valve.

The automatic circuit that more comprises all outage sources is made of a delay circuit that postpones 2 minutes and the power switch and an indicator lamp of a contactless escape.

Comprise that more an air exhauster postpones to stop circuit.

More be provided with one group of time set device on the cooktop panel face, setting-up time then can transmit signals to microprocessor and close the coal gas source automatically and carry out the operation of other safety measures by this.

The utility model is the device of gas cooker security system, mainly be to be the center with a microprocessor, be aided with a flow of gas sensor and signal generator, a plurality of (each stove first) thermal switch is formed, at the flow of gas signal after amplifying, through a series of coupled switch that is contained in burner ignition knob axle, after the suitable delay of the processing of one microprocessor and delay circuit, export the gas pipe main valve that voltage to one electric screwed pipe operation is closed, valve-off and behind Gas shutoff, keep the exhaust blower about 2 minutes bells that remain in operation by a power supply delay circuit, after getting rid of indoor coal gas, just shut down automatically and reach safety.In addition, other has at least one smoke sensing device, be located at exhaust blower near, when the unusual dense smoke of perception, transmit abnormal signal, directly deliver to microprocessor, so that make same coal gas main valve and other safety measures of closing.

Describe structure of the present utility model, feature and effect in detail below in conjunction with accompanying drawing:

Fig. 1 is the comparatively ideal a kind of embodiment of the utility model (four a burner gas cooker), and the main element of its security system is installed in the relevant position schematic diagram of cooking stove.

Fig. 2 is the schematic diagram that control cabinet face of the present utility model is pulled.

Fig. 3 is to be the system line schematic diagram at center with the microprocessor among Fig. 1 embodiment.

Fig. 4, Fig. 5 and Fig. 6 are that the manually open and close that uses of the utility model and electric screwed pipe are operated the gas pipe main valve entity structure of closing and the schematic diagram of action thereof.

As shown in Figure 1,1 is the gas cooker of a multiple head (being four burners among the figure), 10 is burner, four burners are respectively 10A, 10B, 10C and 10D, 2 is one to be installed in the flow of gas sensor on the gas main G, 3 for being installed in four flame temperature inductive switches on each burner 10 side, be respectively 3A, 3B, 3C and 3D, this flame temperature inductive switch 3 is on-state when normal temperature, automatic escape opens circuit during to high temperature, temperature automatically resets when reducing again and connects, 4 for being located near the smoke sensing device the exhaust blower 5,5 of air exhausters be located at cooking stove 1 directly over, and with illuminating lamp tube, 53 for setting closer in limited time, 6 is microprocessor, 67 is DC power supply (Adapter), with the dc source of supply security system, but 7 is the gas pipe main valve that a hand operated and electric screwed pipe are closed, be installed on the gas main G, flow of gas sensor 2 is attached to its downstream and is integral, and 72 release the button for the hand operated of gas pipe main valve 7, and 78 is the manual-lock button, 8 is a buzzing alarm, 90 for abnormal cause warning indicator lamp group, to point out that unusual reason takes place, so that do suitable processing.11 is igniting and the valve opening and closing operation knob on each burner 10, and four knobs are respectively 11A, 11B, 11C and 11D.21 for being located at one group of coupled switch on each knob 11 axostylus axostyle, is connected the circuit of flow of gas sensor, and four switches are respectively 21A, 21B, 21C and 21D.31 for being located at another group coupled switch on each knob 10 axostylus axostyle, be connected the circuit of flame temperature inductive switch 3, four switches are respectively 31A, 31B, 31C and 31D, wherein switch 21A, 21B, 21C and 21D are series connection, and when not using cooking stove 1, be on-state, when opening igniting, sparking valve knob 11 then cuts off this series circuit; And switch 31A, 31B, 31C and 31D are in parallel, and are off state when cooking stove 1 does not use, and then connect circuit when sparking valve knob 11 is opened igniting.70 is the system-wide control cabinet of intrinsic safety (Control box), be located near the wall or table of the pipeline of the gas main cooking stove, gas pipe main valve 7, flow of gas sensor 2, microprocessor 6 and buzzing 8 all are contained in the case, (seeing also Fig. 2) then is provided with warning indicator lamp group 90 on its panel 9, and the hand operated of gas pipe main valve 7 releases the button 72 and X button 78, and a group sound penetrating hole 80 of buzzer 8.

See also the automatic function circuit schematic diagram of the utility model gas cooker security system shown in Figure 3.

At first, the flow of gas sensor 2 that is installed among the figure on the gas main G (shown in Figure 1) produces signal when the sensing flow of gas, divide two groups of conveyings, first group of S1, directly import microprocessor 6, and do about 30 seconds delay rear drive one voltage, in order to running air exhauster 5 and fluorescent tube, another function of this delay of 30 seconds, can make moving when air exhauster 5 and fluorescent tube are unlikely to be taken place in the process that igniting is just being fired for several times, the time stop, the time bright, the time phenomenon of going out.Second group of signal then divides two-way S2 and S3 to export simultaneously again, wherein S2 is connected in series in and divides the coupled switch 21A that is located on each burner knob ignitor switch 11 axostylus axostyle in the leak supervision circuit, 21B, 21C and 21D, and pass to microprocessor 6, before pressing (connection) gas main valve 7 and connecting power supply preparation sparking use simultaneously, tandem tap 21A, 21B, 21C and 21D are on-state, this moment, gas main G planted agent did not have flow of gas, if flow of gas sensor 2 has predicted flow of gas, then must the gas leak phenomenon be arranged for cooking stove 1, sensor 2 sends through amplifying signal S2, immediately via the switch 21A that connects, 21B, 21C and 21D input are at microprocessor 6, and input to little processing center 60, produce an output signal, this output signal postpones about 40 seconds in order to confirm that coal gas is really in continuing leakage via a delay circuit 23, this output signal drives a voltage to the electric screwed pipe 74 (seeing also Fig. 6) of gas pipe main valve 7 and closes gas main valve 7 at this moment, to cut off the coal gas source of gas pipe G, buzzer 8 sounding warning simultaneously, and the gas leak emergency warning lamp 92 on the panel 9 is lighted, and to show unusual reason takes place.But if when different shape not being arranged pressing the gas pipe main valve, promptly prove no gas leak phenomenon, can operate ignition knob 11 this moment so that igniting, when igniting, be contained in coupled switch 21 on 11 of the knobs and be subjected to interlock and cut off, thus the time cooking stove 1 normal ignition burning, the flow of gas in the gas pipe G has become normal phenomenon, so the cooking stove of S2 does not use the safety monitoring under the inactive state to finish, the observation circuit that does not have flame status when after this then being used by the cooking stove of S3 replaces.

Secondly, another road S3 that the flow of gas sensor sends signal among the figure exports a no flame monitoring circuit to, be connected to the coupled switch 31 of a group parallel connection earlier, among the figure 31A, 31B, 31C and 31D, be located at flame temperature inductive switch 3 in parallel on each burner 10 via a group respectively again and (be 3A among the figure, 3B, 3C and 3D), and be sent to microprocessor 6 (please referring to Fig. 1), when cooking stove 1 does not use, this group thermal switch 3 all at on-state coupled switch 31 then at dissengaged positions, but when arbitrary ignition knob 11 starts to ignition location, this group is installed in one of coupled switch 31 on knob 11 axostylus axostyles and promptly is subjected to its interlock and the on-state that arrives, this moment, stove fire just fired, temperature does not raise as yet, so thermal switch 3 is still in on-state, signal S3 can arrive microprocessor 6 through this circuit, but must after 40 seconds delay, could export through a delay circuit 33 because of little processing center 60 and to close coal gas main valve 7, so in these 40 seconds, can not move, because of being raise by temperature promptly in about 20 seconds about igniting, thermal switch cuts off again, make signal can not input to microprocessor, so stove fire can burn away normally, this moment is if the stove fire accident is extinguished during temperature decrease, thermal switch 3 promptly automatically resets and connects, signal S3 thereby be delivered to microprocessor 6, processing via microprocessor 6 produces an output signal, the delayed circuit 33 of this output signal, postpone 40 seconds in order to after confirming that the certain accident of stove fire is extinguished, drive the electric screwed pipe 74 of output one voltage to gas pipe main valve 7, and close gas pipe main valve 7, to cut off the coal gas source of gas pipe G, buzzer 8 sounding warning is not simultaneously lighted and there is flame warning indicator lamp 93.

Moreover, 4 peripheral of smoke sensing devices are connected directly to microprocessor 6 near being installed in exhaust blower among the figure, and signal is sent into little processing center 60, produce an output signal after treatment, this output signal is equally through a delay circuit 43, postpones to confirm after 40 seconds that smog continues to take place, then drive output one voltage to the electric screwed pipe 74 of gas pipe main valve to close main valve 7, make the warning of buzzer sounding simultaneously, and light dense smoke emergency warning lamp 94.

At last, one closes setting apparatus 55 in limited time, can set an appropriate time when using human desires to leave in cooking stove uses, and can allow it close coal gas automatically when the time comes and operates a succession of safety measure.

In addition, being used in the circuit breaker in the microprocessor 6 and the power switch 63 of rectification reducing transformer 67 all is contactless escape switch (Trip switch), avoids using general relay (Relay), to exempt scintillant danger.See also Fig. 4, Fig. 5 and Fig. 6, manually open and close and electric screwed pipe are operated the gas pipe main valve 7 of closing to show one among the figure, be contained on the gas main G, be positioned at the upstream of flow of gas sensor 2 and form and be one, this main valve 7 is by a valve body 71, drive * button 72 by operation on the other hand, spring 73 is put in answering of one button 72, one electric screwed pipe 74, one by electric screwed pipe outward extending wedge trip 75 unshakable in one's determination, a spring 76 and a manual closure lever 77 are put in answering of one wedge trip 75, and the institutes such as X button 78 of a hand operated become; Fig. 4 is shown as main valve 7 and handles the enable possition of pressing behind the manually opened button 72, this moment, trip 75 was protected special valve body 71 among the wedge mortise 721 on button 72 bars in the enable possition owing to the tension force of putting spring 76 again is entrapped in, Fig. 5 shows that hand operated closes the situation of main valve 7, when pressing manual-lock button 78, press a lever 77 and make trip 75 withdraw from mortise 721, close main valve 7 so button 72 ejects.Fig. 6 then shows after abnormal conditions take place gas cooker 1, microprocessor is exported a voltage, electric screwed pipe 74 is magnetized and attracts, and makes trip 75 by breaking away from the mortise 721, this moment, button head 72 was owing to the elastic force of putting spring 73 again pops up, so that body valve body 71 is to the situation of closing.Please note manual-lock button 78 among this figure, do not press different with Fig. 5.

Claims (8)

1, a kind of device of gas cooker security system, it is characterized in that: it mainly comprises: as each component controls center and the connected microprocessor of difference, one rectification reducing transformer of supplying DC power source is aided with the gas pipe main valve that first flame temperature inductive switch, a buzzer, three warning indicator lamps and of a flow of gas sensor and signal generator, a smoke sensing circuit, a plurality of/each stove is installed on the gas main, the manually open and close electric screwed pipe of supply coal gas is operated its keying and forms; Wherein the flow of gas sensor is installed in the downstream of the gas pipe main valve on the above-mentioned gas main and becomes one, and the flame temperature inductive switch then is installed in by each burner; One flow of gas sensor, it is not connected and output signal with a leak supervision circuit before using coal gas, then is connected and output signal with a no flame monitoring circuit after using coal gas.

2. the device of a kind of gas cooker security system as claimed in claim 1, it is characterized in that: wherein said leak supervision circuit, include: one is contained in the flow of gas sensor that gas main is positioned at gas pipe main valve downstream, be installed in the coupled switch of a plurality of/series connection of each burner installing on the axostylus axostyle of ignition knob of each burner, the switch of this switch and ignition knob is an interlock, and this group switch is not the series connection on-state when using stove and accessory, and is connected with above-mentioned microprocessor.

3. the device of a kind of gas cooker security system as claimed in claim 1, it is characterized in that: wherein said no flame monitoring circuit, include: the flame temperature inductive switch of a plurality of parallel connections, this inductive switch is one of the other installing of each burner, it is on-state when normal temperature, automatic tripping is dissengaged positions during high temperature, and the coupled switch of a plurality of parallel connections, this coupled switch is installed in respectively on the axostylus axostyle of ignition knob switch of each burner, each coupled switch all is connected with corresponding thermal switch, and is subjected to the interlock of rotary switch.

4. the device of a kind of gas cooker security system as claimed in claim 1, it is characterized in that: wherein said smoke sensing circuit, include: at least one is contained near the smoke sensing device of the periphery of exhaust blower, and the output of this smoke sensing device is communicated with microprocessor.

5. the device of a kind of gas cooker security system as claimed in claim 1, it is characterized in that: the gas pipe main valve that wherein said manually open and close and electromagnetism are closed, include: a valve body, one hand that is located at valve stem tip is pressed the button of unlatching, one push-button reset spring, the lever of one a manual X button and an interlock, and one cooperate and vertically arranged electric screwed pipe with button head.

6, the device of a kind of gas cooker security system as claimed in claim 1 is characterized in that: more comprise the automatic circuit in all outage sources, be made of a delay circuit that postpones 2 minutes and the power switch and an indicator lamp of a contactless escape.

7, the device of a kind of gas cooker security system as claimed in claim 1 is characterized in that: comprise that more an air exhauster postpones to stop circuit.

8. the device of a kind of gas cooker security system as claimed in claim 1 is characterized in that: more be provided with one group of time set device on the cooktop panel face.

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