CN1138099C

CN1138099C - Combustion state monitoring method for gas stove and its high-safety control system

Info

Publication number: CN1138099C
Application number: CNB011038276A
Authority: CN
Inventors: 徐忠雄
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-16
Filing date: 2001-02-16
Publication date: 2004-02-11
Anticipated expiration: 2021-02-16
Also published as: CN1369666A

Abstract

The present invention relates to a combustion state monitoring method for gas stoves and a safety control system thereof. A first conductive body and a second conductive body separated in an insulated mode are arranged in the range in a gas stove fire combustion place, and are connected into a loop to which a detection device is connected in series so as to monitor the electrodynamic force changes or current changes in the loop. When the safety control system detects that the electrodynamic force or the current in the loop is in moment attenuation or disappearance, the stove fire is judged as in abnormal combustion or is extinguished so that the safety control system makes a gas closing device to operate, and thus, the gas supply to a stove head is cut off so as to achieve the effects of avoiding malfunction and ensuring the safe use of the gas stoves.

Description

The combustion state monitoring method of gas stove and safety control system thereof

Technical field

The present invention relates to a kind of burning method for detecting and safety monitoring system thereof of gas stove.

Background technology

As everyone knows, gas stove is one of the most general daily apparatus of modern, though facility is being used when careless easily, and produces gas poisoning or fire; According to statistics, the reason that causes the gas disaster to take place, not outer is the following situation that meets with in the process of stove fire burning:

1. gas stove itself breaks down or stove fire burning usefulness not good (producing tempering, floating fire or misfire);

2. the error of manual operation or malfunction;

3. external force factor, the extraneous accident that interference caused, as the bumping of foreign object, hit, electric shock, wind, spilling water.

Aforesaid situation is started and is caused gas flame combustion instability, produces a large amount of carbon monoxide and makes the user poison, and some continues to leak because of stove fire extinguishes gas, causes blast or fire when lighting a fire again.

Many gas stoves are provided with " gas safety device ", be that a detecing element is set near the gas stove fire, fired state with this detecing element monitoring stove fire, therefore control the gas safety shielding cell that is located on the gas switch by one group of safety control circuit department, to avoid stove fire under unburned state, still to continue to send methane gas, cause the gas disaster.

Common stove fire detecing element is into the inductive rod of probe shape, be directly installed near the clearing of female glory hole of gas burner, owing to be difficult to bestow effective protection, long-term soup juice, oil smoke and the dust and dirt etc. of process are infected with after accumulation, the burning carbonization repeatedly, and reduce its susceptibility and accuracy, even completely lose the function of stove fire detecting; This detecting inductive rod is set near the clearing the burner again, is subjected to the collision of cook utensil easily or suffers the effect of other external force and depart from original installation position, so that cause the monitoring distortion to stove fire.

Usually, safe and punctual for what ask gas to use, the capital is transferred this detecing element as far as possible and is set as comparatively sensitivity, yet because safety control circuit is the keying that is located at gas switch fully according to the detecting department control of stove fire detecing element, therefore cause this gas safety device that frequent malfunction takes place, cause the puzzlement in the use.

As previously mentioned, the most outstanding shortcoming of gas safety device commonly used is aspect the detecting of stove fire, and its detecing element is subject to external factor or the external force influence causes detecting insensitive, monitoring result inaccuracy, and its security protection usefulness is reduced, and makes us dark feel and causes anxiety; And aspect security control,, consequently can only merely abide by the detection signal of stove fire then because of being short of thoughtful design, the keying of gas switch is controlled in fast reaction, so misoperation often takes place, causes and uses upward puzzlement greatly.

For solving aforesaid drawbacks, now further state in detail as follows with regard to the theory of combustion of gas stove fire, person as known, the burning of Device in Gas is a kind of chemical reaction process, methane gas discharges heat energy by the chemical reaction of burning, in this process, gas molecule is subjected to this thermodynamic activity, the part molecule can dissociate into the ion of band plus or minus electric charge, according to pyroelectric effect, this charged molecule makes electronegative ion that the trend of past high temperature position be arranged the difference of Yin Wendu, positively charged ion has the trend at past low temperature position, thereby goes up formation one electric field at this " combustion field "; If this electric field positive and negative electrode is connected into a loop, form the structure of a similar thermocouple (thermocouple), then can produce an electromotive force between the contact, and in the loop, have the electric current generation.According to aforementioned principles as can be known, when gas combustion takes place unstable or extinguishes, this abnormality will cause the activity conduct of charged molecule to be hindered or disappear, and then cause electromotive force and electric current on this loop to change.

Summary of the invention

The object of the present invention is to provide a kind of safety control system of gas stove, it has the logical circuit setting that formula is confirmed again in safety control system, the stove fire monitoring signal that transmits with regard to the self-detection unit carries out duplicate acknowledgment, therefore filter some temporary false signal or other noises, to seize correct detecting signal as a result, as the foundation of department's control security control running, therefore avoid taking place easily the phenomenon of misoperation.

Another object of the present invention is to provide a kind of method for detecting of gas combustion situation, by to the detecting of the charged molecule of this flame or the monitoring that the electromotive force on this loop, electric current are changed, carry out situation with the burning of accurately knowing gas, the basis of safety control system running is provided, promotes the safe handling of gas stove.

The object of the present invention is achieved like this: a kind of safety control system of gas stove is characterized in that: include a detecting loop, an arrangement for detecting and a gas shutoff device and form;

One detecting loop is in the scope that gas oven fire burns field comprises, and has insulation and separates first conductor and second conductor that is provided with; First conductor and second conductor dbus are crossed lead and are connected into this loop;

One arrangement for detecting is to include: the first signal checking portion, delay timing portion, the second signal checking portion; The first signal checking portion, the second signal checking portion are serially connected with on the above-mentioned detecting loop;

One gas shutoff device is connected in series with the second signal checking portion of arrangement for detecting.

Wherein first conductor and second conductor are that the selection use comprises the conductor component in the scope in gas oven fire burns field.

Described conductor component is metal system burner and furnace body frame, pan bolster.

A kind of method of utilizing the safety control system detecting gas stove combustion position of above-mentioned gas stove, it is characterized in that: by the arrangement for detecting in this safety control system electromotive force on the detecting loop or electric current variation are monitored, accurately to declare the true operating state of knowing this gas oven fire burns field;

It is depleted or when disappearing that the arrangement for detecting that is connected in series in this detecting loop knows that in detecting electromotive force on this detecting loop or electric current are moment, promptly judge the stove fire malcombustion or extinguish, at this moment, the first signal checking portion of this safety control system promptly triggers this delay timing portion, do one and postpone timing, afterwards, by the second signal checking portion signal on this detecting loop being done detecting again judges, after detection signal being confirmed again running through this, detect electromotive force on this detecting loop or electric current when still being moment depletion or vanishing state, the gas shutoff device promptly operates, with the closed gas air feed to burner.

The timing period of this delay timing portion is set in 2-3 in second.

In sum, the variable quantity of the charged molecule that the present invention is produced during to gas combustion according to its mat is done accurate detecting, according to this measurement result department its safety control system of control, and utilize the compound affirmation loop of safety control system to be provided with, reached and avoided taking place easily misoperation, guaranteed the security of gas stove use and the effect of practicality.

Description of drawings

Further specify the present invention below in conjunction with drawings and Examples.

Fig. 1 is for showing the side view of gas combustion arrangement for detecting embodiment of the present invention.

Fig. 2 is the functional block diagram of safety control system of the present invention.

The specific embodiment

Please refer to shown in Figure 1, the present invention is the safety control system that a result who is used for accurately measuring the method for detecting of fired state of gas stove and therefore detecting burning uses as gas stove, and this safety control system is made up of a detecting loop 2, an arrangement for detecting 3 and a gas shutoff device 34; Detecting loop 2 is to include at the combustion field A of gas burner to comprise first conductor 21 and second conductor 22 that has insulation separation setting in the scope, by lead 23 first conductor 21 and second conductor 22 are connected into a loop, and monitor in the electromotive force or the electric current variation that are connected in series on this detecting loop 2 on 3 pairs of these detecting loops 2 of an arrangement for detecting.

This first conductor 21 and second conductor 22 need not be provided with by extra components, be to select to use to comprise scope inner wire member at gas oven fire burns field A, just like: metal system burner and furnace body frame, pan bolster ... Deng conductor component; Giving indivedual insulation with the inside and outside flame ring of burner and separate setting, is first conductor 21 and flame envelope ring second conductor 22 with the internal flame ring; Also arbitrary separation of insulating of whole burner and furnace body frame or pan bolster can be set up, with whole burner is first conductor 21, with furnace body frame or pan bolster as second conductor 22, as showing among Fig. 1, embodiments of the invention are as first conductor 21 with metal system burner, and with the pan bolster of furnace body frame as second conductor 22, and this burner is to utilize an insulating base and be fixed on this furnace body frame.

When the stove fire normal combustion, be connected on detecting dress on this return wire 23 and scold 3 and can on detecting loop 2, record electromotive force or electric current; And when stove fire malcombustion (as floating fire, jump fire) or when extinguishing, this arrangement for detecting 3 promptly can't record electromotive force or electric current on detecting loop 2; Therefore, this arrangement for detecting 3 is able to superprecision and measures the true operating state of the combustion field A of this Gas cooker accurately.

Please refer to shown in Figure 2, the present invention is when that the electromotive force on this detecting loop 2 or electric current are moment is depleted or when disappearing ... also promptly judge the stove fire malcombustion or when extinguishing, the first signal checking portion 31 of this arrangement for detecting 3 will trigger this delay timing portion 32 and do an of short duration delay timing, behind this specific timing period, do the detecting judgement by the signal that the second signal checking portion 33 detects on this detecting loop 2, after detection signal being confirmed again running through this, detect electromotive force on this detecting loop 2 or electric current when still being moment depletion or vanishing state, even 34 runnings of this arrangement for detecting 3 gas shutoff devices, with the closed gas air feed to burner.

The aforementioned timing period of confirming was again set about 2-3 in second, therefore filtered some temporary false signal or other noises, with the stability of guaranteeing safety control system 1 running, prevent misoperation; Again, in the multiple affirmation inspection period of this suitable length, during if the gas combustion situation is lasting unusually, also unlikely generation is dangerous, for example be in the worst case, though the leakage methane gas that under the situation that is not having burning, continues, the i.e. closed gas path automatically of this safety control system 1 after short several seconds, flow is among outer gas amount is dissipated in very fast dilution air during this time, still unlikelyly causes harm.

As can be known above-mentioned, mat of the present invention is to the accurate monitoring of combustion field A, the basis of this safety control system running is provided, to promote the safe in utilization of gas stove, and it has the logical circuit setting of compound affirmation in safety control system 1, can filter some temporary false signal or other noises, to seize correct detecting signal as a result, as the foundation of department's control security control running, therefore avoid taking place easily the phenomenon of misoperation.

This explanation embodiment is selected be used for being convenient to describe marrow of the present invention and practical application; the present invention is subject to disclosed form; reference above stated specification clearly is possible make various improvement and change, and all have in that identical creation spirit is following do relevant any modification of the present invention or change all must be included in the category that the invention is intended to protect.

Claims

1. the safety control system of a gas stove is characterized in that: include a detecting loop (2), an arrangement for detecting (3) and a gas shutoff device (34) and form;

One detecting loop (2) is in the scope that gas oven fire burns field (A) comprises, and has insulation and separates first conductor (21) and second conductor (22) that is provided with; First conductor (21) connects into this loop with second conductor (22) by lead (23);

One arrangement for detecting (3) is to include: the first signal checking portion (31), delay timing portion (32), the second signal checking portion (33); The first signal checking portion (31), the second signal checking portion (33) are serially connected with on the above-mentioned detecting loop (2);

One gas shutoff device (34) is connected in series with the second signal checking portion (31) of arrangement for detecting (3).

2. the safety control system of gas stove as claimed in claim 1 is characterized in that: wherein first conductor (21) and second conductor (22) are to select to use the conductor component that comprises in gas oven fire burns field (A) in the scope.

3. the safety control system of gas stove as claimed in claim 2 is characterized in that: described conductor component is metal system burner and furnace body frame, pan bolster.

4. the method for a safety control system detecting gas stove combustion position that utilizes the described gas stove of claim 1, it is characterized in that: by the arrangement for detecting in this safety control system (3) electromotive force on the detecting loop (2) or electric current variation are monitored, accurately to declare the true operating state of knowing this gas oven fire burns field (A);

The arrangement for detecting (3) of serial connection is when detecting knows that electromotive force on this detecting loop (2) or electric current are moment depleted or disappearance in this detecting loop (2), promptly judge the stove fire malcombustion or extinguish, at this moment, the first signal checking portion (31) of this safety control system promptly triggers this delay timing portion (32), do one and postpone timing, afterwards, by the second signal checking portion (33) signal on this detecting loop (2) being done detecting again judges, after detection signal being confirmed again running through this, detect electromotive force on this detecting loop (2) or electric current when still being moment depletion or vanishing state, gas shutoff device (34) promptly operates, with the closed gas air feed to burner.

5, method according to claim 4 is characterized in that: the timing period of this delay timing portion (32) is set in 2-3 in second.