CN205447872U - Automatic ignition flame out protection device - Google Patents

Abstract

The utility model provides an automatic ignition flame out protection device, place cooking utensils in the in, through intake pipe and the switch -on of gas source, still include detection module, detection module includes sampling unit, sampling unit includes the combustible gas sensor, the combustible gas sensor is used for detecting near cooking utensils combustible gas concentration, sampling unit exports sample voltage, works as when sample voltage is greater than presupposition voltage, the detection module alarm output signal, alarm module, alarm module be coupled in detection module works as worked when alarm module receives alarm signal, in order to remind the people who is cooking to need near the too high existence of main gas concentration dangerous, effectively prevented gas gas leakage when gas concentration is too high, or fired the condition such as the fire extinguishes emergence.

Description

Automatic ignition flame-out protection device

Technical field

This utility model relates to a kind of combustion gas protection device, particularly to a kind of automatic ignition flame-out protection device.

Background technology

Present kitchen range generally use natural gas, liquefied gas or gas-fired, thus heat the kitchen tools cooked, and make food ripening.

Notification number is to disclose a kind of automatic ignition flame-out protection device for combustion type barbecue equipment in CN203597291U; being to utilize high thermojunction type, its operation principle is thermocouple when being heated, and it can produce thermoelectrical potential; this electromotive force can make electromagnetic valve work, thus controls the switching of blast tube.Protection device is effectively improved the safety coefficient of barbecue equipment; there is good practicality; if during gases such as also can producing substantial amounts of natural gas, liquefied gas or coal gas exists the air near kitchen range but combustion gas can not fully be burnt, staff can be made to there is the potential safety hazard of carbon monoxide poisoning or blast.

Utility model content

The purpose of this utility model is to provide a kind of to coal gas detection automatic ignition flame-out protection device more comprehensively.

Above-mentioned purpose of the present utility model has the technical scheme that

A kind of automatic ignition flame-out protection device; it is built in kitchen range; connected with fuel gas source by air inlet pipe; also include that detection module, described detection module include that sampling unit, described sampling unit include combustible gas sensor; described combustible gas sensor is used for detecting combustable gas concentration near kitchen range; described sampling unit output sampled voltage, when described sampled voltage is more than predeterminated voltage, described detection module output alarm signal；Alarm module, described alarm module is coupled to described detection module, works when described alarm module receives alarm signal.

By using technique scheme, combustible gas sensor is that the resistance variations after utilizing the heating of refractory metal platinum filament is to measure combustable gas concentration, when fuel gas enters detector, oxidation reaction (flameless combustion) is caused on platinum filament surface, its heat produced makes the temperature of platinum filament raise, and the resistivity of platinum filament just changes, for detecting combustable gas concentration content near kitchen range, sampling unit changes into voltage signal output existing concentration content, when its concentration is more than the voltage being in described in preset concentration, detection module output alarm signal, alarm module receives alarm signal alarm, to remind the people cooked to need gas concentration near main too high dangerous, effectively prevent gas leakage, or fire the situation generations such as fire extinguishing.

As improvement of the present utility model; described automatic ignition flame-out protection device also includes timing module; described timing module is coupled to described detection module; described timing module includes electromagnetic valve; described electromagnetic valve is arranged in air inlet pipe; starting timing when described timing module receives alarm signal and export cut-off signals through a Preset Time, described electromagnetic valve is controlled by cut-off signals Guan Bi.

By using technique scheme, timing module is controlled by alarm signal work, when receiving alarm signal, timing module starts timing, when exporting cut-off signals through timing module after a period of time, make the electromagnetic valve in air inlet pipe turn off, do not allow combustion gas continue leakage, the staff that mainly prevents from kitchen range there be nobody nearby living does not hears warning, effectively prevents the dangerous situations such as combustion gas poisoning or blast from occurring.

As improvement of the present utility model, described detection module also includes reference cell and comparing unit, described reference cell output predeterminated voltage, and described comparing unit is used for comparing sampled voltage and predeterminated voltage, when described sampled voltage is more than predeterminated voltage, described comparing unit output alarm signal.

By using technique scheme, reference cell and the setting of comparing unit, sampled voltage that sampling unit export and the predeterminated voltage that base modules exports is made to be compared by comparator and judge whether output alarm signal so that it is accuracy of detection is higher.

As improvement of the present utility model, described reference cell includes the first resistance and the second resistance being arranged in series, the node output predeterminated voltage that described first resistance and the second resistance couple.

By using technique scheme, utilize the node output predeterminated voltage that the first resistance and the second resistance couple, the precision making the predeterminated voltage of acquirement is higher, can also be adjusted the size of predeterminated voltage simultaneously by the resistance changing the first resistance and the second resistance, i.e. preset the size of gas concentration.

As improvement of the present utility model, described comparing unit includes comparator and the first relay coil, the positive input terminal of described comparator couples described sampling unit, the negative input end of described comparator couples reference cell, the described comparator output high level signal when described sampled voltage is more than predeterminated voltage, described first relay coil is controlled by this high level signal and obtains electric work output alarm signal.

By using technique scheme, by comparator predeterminated voltage and sampled voltage compared and make the precision of detection higher, when comparator output high level, represent that sampled voltage is higher than predeterminated voltage, make the first relay coil work, used simultaneously first relay coil drive actuator work, so arrange guarantee circuit do not produced by surrounding magnetic field affected less.

As improvement of the present utility model, described sampling unit includes the 3rd resistance connected with described combustible gas sensor, the node output sampled voltage that it couples.

By using technique scheme, owing to combustible gas sensor can only export analogy of direct electricity signal between the function of device, so the resistance that needs to connect on a sensor is converted into voltage signal unidirectional current and exports.

As improvement of the present utility model, described timing module includes trigger, timing unit, described timing unit includes enumerator, described enumerator includes Enable Pin and overflows end, described trigger is coupled to the Enable Pin of described enumerator, and described trigger is controlled by described alarm signal and obtains electric, when described spilling end output high level after described counter works the first Preset Time, described second relay coil is coupled to described spilling end and is controlled by the work of this high level, exports cut-off signals.

By using technique scheme, when timing module alarm signal, trigger output high level, prevent because wind or some extraneous factors make the air-flow near combustible gas sensor bigger, can not detected gas concentration accurately, make alarm signal intermittent, make enumerator cisco unity malfunction, the setting of trigger effectively prevent this situation, the trigger savings output high level when receiving high level, make timing unit receive the stable signal of telecommunication and start timing, when after a Preset Time, the spilling end output high level of this enumerator makes electromagnetic valve obtain electric work.

As improvement of the present utility model, described trigger couples the first relay normally open contact described in one first relay normally open contact and is controlled by described Guan Bi of reporting to the police.

By using technique scheme, couple the first relay normally open contact due to trigger and the first relay normally open contact is controlled by described alarm signal Guan Bi, make close in time when the first relay normally open contact receives alarm signal, make electromagnetic valve can close air inlet pipe after the scheduled time in time and prevent gas from leaking.

As improvement of the present utility model, described alarm module includes buzzer and the second relay normally open contact being arranged in series, and described second relay normally open contact is controlled by described alarm signal Guan Bi.

By using technique scheme, the setting of the second relay normally open contact makes the precision of circuit higher, closes when the second relay normally open contact receives alarm signal, is that buzzer obtains and electric sends sound, to remind staff to implement effective measures.

In sum, this utility model has the advantages that combustible gas sensor is that the resistance variations after utilizing the heating of refractory metal platinum filament is to measure combustable gas concentration, when fuel gas enters detector, oxidation reaction (flameless combustion) is caused on platinum filament surface, its heat produced makes the temperature of platinum filament raise, and the resistivity of platinum filament just changes, for detecting combustable gas concentration content near kitchen range, sampling unit changes into voltage signal output existing concentration content, when its concentration is more than the voltage being in described in preset concentration, detection module output alarm signal, alarm module receives alarm signal alarm, to remind the people cooked to need gas concentration near main too high dangerous, effectively prevent gas leakage, or fire the situation generations such as fire extinguishing.

Accompanying drawing explanation

Fig. 1 is automatic ignition flame-out protection device structural representation；

Fig. 2 is detection module connection circuit figure；

Fig. 3 is timing module connection circuit figure；

Fig. 4 is alarm module connection circuit figure.

In figure, 1, fuel gas source；11, air inlet pipe；2, kitchen range；21, knob；3, detection module；31, sampling unit；311, combustible gas sensor；32, reference cell；33, comparing unit；331, the first relay coil；4, timing module；41, rectification unit；42, filter unit；43, voltage regulation unit；44, timing unit；45, trigger；46, electromagnetic valve；5, alarm module；51, the second relay normally open contact.

Detailed description of the invention

Below in conjunction with accompanying drawing, this utility model is described in further detail.

nullWith reference to shown in Fig. 1，A kind of automatic ignition flame-out protection device includes fuel gas source 1、Kitchen range 2、Detection module 3、Alarm module 5 and timing module 4，It is connected between fuel gas source 1 with kitchen range 2 by air inlet pipe 11，This air inlet pipe 11 controls gas flow size by knob 21，Combustible gas sensor 311 it is provided with near kitchen range 2，Combustible gas sensor 311 is that the resistance variations after utilizing the heating of refractory metal platinum filament is to measure combustable gas concentration，When fuel gas enters detector，Oxidation reaction (flameless combustion) is caused on platinum filament surface，Its heat produced makes the temperature of platinum filament raise，And the resistivity of platinum filament just changes，For detecting combustable gas concentration content near kitchen range 2，And current gas concentration is changed into telecommunications export well，When its concentration is more than the voltage being in described in preset concentration，Detection module 3 output alarm signal，Alarm module 5 receives alarm signal alarm，To remind the people cooked to need gas concentration near main too high dangerous，Effectively prevent gas leakage，Or fire the situation generations such as fire extinguishing.

With reference to shown in Fig. 2, detection module 3 includes sampling unit 31, reference cell 32 and comparing unit 33, described reference cell 32 exports predeterminated voltage, described comparing unit 33 couples described reference cell 32 and sampling unit 31, described comparing unit 33 is used for comparing sampled voltage and predeterminated voltage, described comparing unit 33 output alarm signal.nullDescribed sampling unit 31 includes combustible gas sensor 311 and the 3rd resistance being arranged in series，The node output sampled voltage that it couples，Due to combustible gas sensor 311 output is electric current，So one resistance of series connection changes into voltage electric current and exports，This sampling unit 31 is also coupled to an electric capacity，This electric capacity prevents voltage excessive to puncture the comparator effect for voltage stabilizing，The resistance of the 3rd resistance R3 is 10R ohm，Reference cell 32 includes the first resistance and the second resistance being arranged in series，Described first resistance and the second resistance couple node output predeterminated voltage，Its resistance be respectively the first resistance R1 be 100K ohm，Second resistance R2 is 100K ohm，Comparing unit 33 includes comparator and the first relay coil 331 being arranged in series，Comparator is used for comparing predeterminated voltage and sampled voltage，The output high level when sampled voltage is more than predeterminated voltage，To drive the first relay coil 331 to work output alarm signal.

nullWith reference to shown in Fig. 3，Timing module 4 includes rectification unit 41、Filter unit 42、Voltage regulation unit 43、Timing unit 44、First relay normally open contact、Light emitting diode、Trigger 45 and electromagnetic valve 46，Owing to the voltage required for enumerator is DC voltage，So needing through over commutation、Filtering and voltage stabilizing，Unidirectional current is become to export 220V AC conversion to the power interface of enumerator，Close when the first relay normally open contact receives alarm signal，Described trigger 45 exports high level not to be affected by the first relay normally open contact，Prevent electromagnetic valve 46 circulation from cut-offfing，Allow gas leakage，The R pin of trigger 45 is connected to reset key，When enumerator is through after a period of time，The spilling end output high level of enumerator，Electromagnetic valve 46 is made to work，Allow combustion gas disconnect do not flowing out，Connect a light emitting diode for pointing out whether electromagnetic valve 46 is in obtain electricity condition with electromagnetic valve 46.

With reference to shown in Fig. 4; alarm module 5 includes the second relay normally open contact 51 and buzzer; second relay normally open contact 51 is controlled by alarm signal Guan Bi; report to the police to drive buzzer to obtain the electric sound that sends; audion primarily serves on-off action in this circuit; for controlling buzzer work, audion is also coupled to and resistance, and this resistance is protective resistance.

This specific embodiment is only to explanation of the present utility model; it is not to restriction of the present utility model; the present embodiment can be made after reading this specification by those skilled in the art as required does not has the amendment of creative contribution, but as long as all being protected by Patent Law in right of the present utility model.

Claims (9)

1. an automatic ignition flame-out protection device, is built in kitchen range (2), is connected with fuel gas source (1) by air inlet pipe (11), it is characterised in that: also include

Detection module (3), described detection module (3) includes sampling unit (31), described sampling unit (31) includes combustible gas sensor (311), described combustible gas sensor (311) is used for detecting combustable gas concentration near kitchen range (2), described sampling unit (31) output sampled voltage, when described sampled voltage is more than predeterminated voltage, described detection module (3) output alarm signal；

Alarm module (5), described alarm module (5) is coupled to described detection module (3), works when described alarm module (5) receives alarm signal.

Automatic ignition flame-out protection device the most according to claim 1; it is characterized in that: described detection module (3) also includes reference cell (32) and comparing unit (33); described reference cell (32) output predeterminated voltage; described comparing unit (33) couples described reference cell (32) and sampling unit (31); described comparing unit (33) is used for comparing sampled voltage and predeterminated voltage, described comparing unit (33) output alarm signal.

Automatic ignition flame-out protection device the most according to claim 2, it is characterised in that: described reference cell (32) includes the first resistance and the second resistance being arranged in series, the node output predeterminated voltage that described first resistance and the second resistance couple.

Automatic ignition flame-out protection device the most according to claim 2; it is characterized in that: described comparing unit (33) includes comparator and the first relay coil (331); the positive input terminal of described comparator couples described sampling unit (31); the negative input end of described comparator couples reference cell (32); the described comparator output high level signal when described sampled voltage is more than predeterminated voltage, described first relay coil (331) is controlled by this high level signal and obtains electric work output alarm signal.

5. according to the automatic ignition flame-out protection device described in claim 1 or 2 or 3 or 4; it is characterized in that: described sampling unit (31) includes the 3rd resistance connected with described combustible gas sensor (311), the node output sampled voltage that it couples.

Automatic ignition flame-out protection device the most according to claim 1; it is characterized in that: described automatic ignition flame-out protection device also includes timing module (4); described timing module (4) is coupled to described detection module (3); described timing module (4) includes electromagnetic valve (46); described electromagnetic valve (46) is arranged in air inlet pipe (11); starting timing when described timing module (4) receives alarm signal and export cut-off signals through a Preset Time, described electromagnetic valve (46) is controlled by cut-off signals Guan Bi.

Automatic ignition flame-out protection device the most according to claim 6, it is characterized in that: described timing module (4) includes trigger (45), timing unit (44), described timing unit (44) includes enumerator, described enumerator includes Enable Pin and overflows end, described trigger (45) is coupled to the Enable Pin of described enumerator, described trigger (45) is controlled by described alarm signal and obtains electric, when described spilling end output high level after described counter works the first Preset Time, second relay coil is coupled to described spilling end and is controlled by the work of this high level, output cut-off signals.

Automatic ignition flame-out protection device the most according to claim 7, it is characterised in that: described trigger couples one first relay normally open contact, and described first relay normally open contact is controlled by described alarm signal Guan Bi.

Automatic ignition flame-out protection device the most according to claim 1; it is characterized in that: described alarm module (5) includes buzzer and the second relay normally open contact (51) being arranged in series, described second relay normally open contact is controlled by described alarm signal Guan Bi.