CN2077964U - Gas range with automatic valve - Google Patents

Abstract

The utility model relates to a self-closing device of extinguishing and timing for gas implements. A thermocouple is arranged near a fire hole of a gas implement, and an electromagnetic valve which is connected with the thermocouple through a wire is arranged inside a switch of the gas implement. The utility model is characterized in that a timing mechanism is connected in series between the electromagnetic valve and the wire of the thermocouple to control the wire to be in the state of conducting, breaking or timing switching-on, etc; the thermocouple is heated to generate an electric current to cause the electromagnetic valve to be magnetized to keep a gas channel open; on the occasion that the fire is extinguished or the wire is switched off, magnetism of the electromagnetic valve disappears, and a valve clack can automatically block the gas channel or cut off the gas at the set time.

Description

Gas range with automatic valve

The utility model relates to the switching device of Gas appliance, is meant a kind of switching device that has the Gas appliance of flame-out and the dual automatic security device of timing concurrently especially.

Gas appliance such as gas oven or water heater etc. have the gas hazards such as causing accident or blast that leak often owing to use, so its safety device still become the target that people constantly study improvement.By prior art as can be known, the gas safety device is with regard to the position of its installing at present, and two classes can be divided in summary;

First kind safety device is the super flow safety anti-explosive device that is installed in total source of the total source of gas such as gas steel cylinder or natural gas pipe end, and the leakage that this kind device can the detect gas pipeline gas source of existing side by side is soon closed, to avoid the disaster that meets accident.Its structure kind is many, also develops the device of the timing automatic closing function of a kind of tool recently.With regard to it can be to have attained maturation with regard to the effect of performance.Only can only detect the abnormality that gas leaks in a large number in the pipeline because of it, but if Gas appliance such as its stove fire such as gas oven or hot water take place by wind or the soup juice that is overflowed is unexpected when doing to put out, the gas that leak because of burner this moment still belongs to the normal discharge scope, and the super flow apparatus of this kind just can't be brought into play the function of its Security alert.This kind safety device this very serious defective that is had formerly in the sky makes it only to be suitable for being used as monitoring by the first road safety device of gas source to watt basic stone road between Gas appliance.The defective of extinguishing the gas that leaks because of stove fire that is occurred in use as for this Gas appliance then needs be monitored by another kind of safety device.

The second class safety device is directly to be installed on the Gas appliance, and its main purpose is the burner flame of detecting Gas appliance.Make when this burner fray-out of flame takes place, can leak to prevent gas immediately with the gas supply pathway closure of Gas appliance.Its operation principle is whether the variation with near the temperature difference burner comes the perception stove fire to extinguish and react immediately.Though the pattern of this safety device is many, its structure then can roughly be divided into two kinds of electronic type and mechanical types.Typical electronic formula structure can Taiwan utility application case before No. 6824929 " gas of improvement extinguishes self closing device " and No. 7125774 " it is new and improved that gas extinguishes fiery device " two patent case be representative, the mechanical type structure then can the Taiwan utility application No. 7223202 " gas is cut automatically and closed device " and the 7222688th device of closed gas " the temp sensing type power-free circle round automatically " preceding case of two patents be representative.These structures all can reach when stove fire taking place extinguish immediately the effect of closed gas automatically.But, because the electronic type extinguishing means need use electronic component and battery as power supply, mechanical type blanket member is quite complicated again, adding these structures all need directly be installed on the Gas appliance, wherein be that example is used because of need are placed in the kitchen with the gas oven, therefore total invasion and attack (parts etc. of getting wet when spilling or cleaning as soup) that unavoidably will be subjected to greasy dirt, soup have the anxiety of making moist unavoidably.So rate is also high so this type of safety device is because the influence that is subjected to environment for use is broken down, and is difficult to get consumer reception.Though so the date that these structures are got permission patent very early, yet do not see so far and be widely adopted that reason does not have it, and is impracticable because of it nothing but.

In addition, stewing when boiling thing, often need when wait on the side or take, be seen to look into, so that can't effectively utilize this section to wait for the time.Be head it off, just be created in the design of installing timing mechanism on the Gas appliance.The structure kind of this timing mechanism is also a lot of, typically as Taiwan utility application case No. 74204716 " gas switch device " and No. 74208813 preceding case such as " Gas cooker self-timing shutoff device " patent.This kind mechanism really can avoid boiling the worry that need wait on the side when cooking a meal, still, if only it is implemented separately, then just in case the stove fire accident when extinguishing because unmanned in the side treatment, the possibility that meets accident is still very high.And if to cooperate above-mentioned safety device to implement, then again because of the reliability of these safety devices itself inadequately difficulty attain ideal.

In other words, though its developing history of the safety device of being installed on the Gas appliance is long, though the structure kind that development is come out is many, however do not see so far a kind of not only had stove fire extinguish function can cut off gas supply automatically but also have timing function so as on time automatically closed gas, the feasible and unexpected meeting of simple structure because of electronic component the more or parts gas appliance safety device that breaks down easily because of making moist of precision complexity too.

In view of this, the applicant is that long-pending its is engaged in the manufacturing and the design experiences of gas utensil for many years, the analysis of concentrating on studies, and go through repeatedly improvement, work out a kind of innovative device that is enough to meet above-mentioned all demand finally.

The main purpose of the utility model is to be to provide a kind of Gas appliance flame-out and regular automatical shutoff device, and this device can cut off gas supply automatically when stove fire extinguishes, and has the regularly dual safe effect of closed gas again.

Another purpose of the utility model is to be to provide a kind of Gas appliance flame-out and regular automatical shutoff device, and its structure simple harmonic quantity is reasonable, can be applicable to oil, the more evil environment of water and is difficult for breaking down.

The another purpose of the utility model is to be to provide a kind of Gas appliance flame-out and regular automatical shutoff device, and it is constructed, and it is simple, makes or assembling low cost of manufacture and excellent performance easily.

Flame-out and the regular automatical shutoff device according to a kind of Gas appliance that the utility model provided, this device is installing one thermocouple near the burner of Gas appliance, in the switch of this Gas appliance, install a magnetic valve again, this magnetic valve is communicated with this thermocouple with lead, so that be subjected to the effect of burner flame to produce electric current and make this magnetic valve sense magnetic with this thermocouple, use so that the gas channel of this switch keeps channel status.This thermocouple does not produce electric current when stove fire extinguishes, and the magnetic of this magnetic valve disappears and automatically this gas channel cut off with its flap, to guarantee the safety of use.The time movement that it is characterized in that also connecting between the lead of this thermocouple and magnetic valve is controlled this lead and is path, opens circuit or different situations such as timing path, to reach the convenient effect of automatic closed gas.The structure of the utility model to simplify can reach stove fire and extinguish automatic cut-out gas, and the dual safety guarantee of timing automatic cut-out gas, takes into account the reliability of product and cheap manufacturing cost simultaneously.

After the purpose of the utility model, feature and effect are illustrated in by a preferred embodiment and conjunction with figs., just can be further to understanding and approval.Wherein:

Fig. 1 is the floor map of the utility model preferred embodiment, shows the state of closed electromagnetic valve.

Fig. 2 is same as Fig. 1, but shows the situation of magnetic valve unlatching.

Fig. 3 is the floor map of the utility model time movement, shows off state.

Fig. 4 is same as Fig. 3, but shows the timing channel status.

Fig. 5 is same as Fig. 3, but shows not-time channel status.

See also each accompanying drawing, the utility model Gas appliance is flame-out to be included with regular automatical shutoff device:

One thermocouple (10), be installed near the position burner (2) of Gas appliance (1) (the utility model is example with the gas oven, and it is on the burner of fuel that this device also can be widely used in using gases such as water heater) so that the high temperature during induction burner (2) burning produces an electric current.

One magnetic valve (20) is installed on the switch (3) of gas oven (1), wherein includes:

One valve seat (21) is made by the sense magnetic metal, and this valve seat is installed in the gas supply path (4) of this switch (3);

One valve (22), has a sense magnetic flap (23), and a body of rod (24) extends in the one side central authorities of this flap (23) certainly, and this body of rod (24) is hubbed on the precalculated position, makes this flap (23) face the through hole (5) of this valve seat (21) and this gas path (4); This flap (23) is provided with leakage-preventing gasket (25) towards the wall of this through hole (5), and in order to block this through hole (5), this flap can be subjected to pushing of this gas switch knob (not showing on the figure) and recline toward this valve seat (21);

One spring (26) is set on this body of rod (23), keeps the state of this gas path (4) of sealing in order to force this valve (22);

One coil (27), be wrapped on this valve seat (21), its two ends also are communicated with this thermocouple (10) with lead (28) (29), when being heated the generation electric current with this thermocouple of box lunch (10), can make this valve seat (21) generation magnetic field and hold past its close valve (22), so that make the gas path keep unimpeded.

What mechanism (30) was connected on this thermocouple (10) and this magnetic valve (20) coil (27) when certain is connected lead (29) centre, be fixedly installed on the switch panel of gas oven (1), be path or open circuit in order to control this lead (29), wherein include:

One touches switch (31), is made of a fixed contact (32) and an elastic contact (33), and this lead (29) then is connected to respectively on this two point (32) (33) with two leads (34), to constitute a loop;

One control lever (35), pivotally be set in place in the pre-position of this switch (31) below with the one end, its free end top is provided with a protuberance (36), and in order to overlap with this elastic contact (33), its below then is extended with a contacting part (37) downward vertically;

One turns round wheels (38) automatically, includes a ratch (39), a spring (not showing on the figure) and plurality of gears elements such as (not showing on the figure).The circumference of this ratch (39) is provided with a short slot (391), this ratch is with the periphery of circumference and contacting part (37) apical grafting of this control lever (35), and can be subjected to user's turn and rotate moving predetermined angular, and can utilize its elasticity that plays clockwork spring return the power of releasing automatically revolution reset and oppress this elastic contact (33) so that push away this control lever (35) with its dome, make two point (32) (33) contact of this switch (31) and make lead (29) conducting; Or go to this control lever (35) contacting part (37) below with its short slot (391), so that this elastic contact (33) sets back by itself elasticity, thereby the two point (32) (33) of this switch (31) is separated and make lead (29) be off state.

Combination by means of above-mentioned all members, in use, when the utility model is opened gas by the switching knob of this gas switch of operator presses (3) and turning knob, utilizing knob to press down this valve of promotion (22) down is shifted, the body of rod (24) breaks away from flap (23) to block the position of this gas through hole (5) and reclines toward this valve seat (21), and compresses this spring (26) and make it store an elasticity to return the power of releasing.At this moment, gas flow to burner (2) rapidly via this through hole (5) and is lighted by igniter.The high heat that produces during burning is heated this thermocouple (10) and is produced electric current.This moment, the operator must keep pushing this gas switch knob five seconds, so that allow gas can supply the burner burning fully, and make this galvanic couple (10) can accept long heat time heating time, so that its produce in enough electric currents and make this valve seat (21) produce enough suction, hold so that will abut in the last flap (23) of this valve seat (21), thus make that gas can be without cease in a steady stream be supplied to this burner (2) via this through hole (5) and go up burning.When in case the soup juice that stove fire is put out or overflowed by the wind suction waters and puts out, the generation electric current because this thermocouple (10) no longer is heated, therefore the magnetic of this valve seat (21) disappears, this valve (22) is returned by the elasticity of spring (26) promptly to release the power effect and sets back automatically, and this through hole (5) blocked fully, cut off the gas supply of this Gas appliance, to guarantee safety.

Effect as for this time movement (30) then sees also shown in Fig. 3 to 5.Figure 3 shows that the utility model when not using goes to " pass " schematic diagram (OFF) with this timing mechanism (30).The short slot (391) of this mechanism this moment (30) is positioned at contacting part (37) below of this control lever (35).Therefore this switch (31) is off state, and promptly the electric current of this thermocouple (10) can't flow through this valve seat (21) and makes it produce magnetic.In any case therefore rotate the knob of this gas oven switch again, this valve (22) can't be held by this valve seat (21) all the time.Therefore as long as one let go, this knob no longer is pressed, this valve (22) be subjected to immediately this spring (26) screen resilience effect and block this gas through hole (5) automatically, stove fire is extinguished immediately.This kind effect can prevent from may cause producing contingency because of child stealthily plays with fire etc.

Schematic diagram when as shown in Figure 4, the revolution wheels (38) automatically of this timing mechanism (30) are gone to the precalculated position by counterclockwise group.This moment this control lever (35) contacting part (37) be subjected to this ratch (39) periphery compressing and on move, and go up curved and make this switch (31) conducting with its protuberance (36) this elastic contact of ejection (33), so this thermocouple (10) and this magnetic valve (20) can be brought into play the effect that it is answered.This ratch (39) returns the power effect of releasing slowly revolution clockwise because of the spring that is subjected to these revolution wheels (38).When side under its short slot (391) goes to this control lever (35) contacting part (37) once again, the suffered compressing power of this elastic contact (33) disappears, and set back by itself elastic-restoring force, this switch (31) is once again to open circuit, the magnetic of this magnetic valve (20) therefore disappears, and its valve (22) is blocked gas through hole (5) again automatically and stove fire is extinguished automatically.

Shown in the 5th figure, automatically the revolution wheels (38) of this timing mechanism (30) are dialled the schematic diagram that goes to predetermined angular clockwise, the spring of these revolution wheels (38) is not owing to screwed at this moment, therefore do not produce back the power of releasing, promptly this ratch (39) is that to be fixed on same position motionless, compel and this control lever (35) is up pushed up, and force the permanent situation that keeps conducting (ON) of this switch (31).Effectiveness does not take place in this timing mechanism this moment (30), but this thermocouple (10) and this magnetic valve (20) still can keep normal effect, promptly still has the safe effect of stove fire automatic closed gas when extinguishing.

When providing a kind of stove fire to extinguish, the structure that the advantage of the utility model is to simplify most automatically cuts off the innovative device of gas and timing turning off gas dual safety effect, and this device need not use the electronic building brick of complexity or the mechanical component of exquisite precision, so can make the Reliability Enhancement of its operation, the demand that more can meet the poor environment of kitchen this kind heavy wool dirt, soup is with the security of guaranteeing to use. In addition, owing to can significantly reduce production costs, therefore can improve the competitiveness of product.

Claims (2)

1, the flame-out and regular automatical shutoff device of a kind of Gas appliance, this device includes:

-burner the place that is arranged at Gas appliance produces the thermocouple of an electric current in order to the influence of accepting the burner flame temperature;

-magnetic valve, this valve includes:

-valve seat is installed on the Switch main body of Gas appliance;

-be hubbed on the correspondence position of this valve seat valve in order to the gas supply path of sealing burnt gas switch, when pushing this burnt gas switch, this valve is stressed and close toward this valve seat, to open the gas path;

-keep the flexible member of this gas path of sealing in order to force this valve;

-be wrapped on this valve seat, coil that its two ends are connected with this thermocouple with lead, when this thermocouple is heated when producing electric current, can make this valve seat induct magnetic field and hold, so that the maintenance of gas path is unimpeded toward its close valve;

It is characterized in that this self closing device also comprises mechanism when certain, this timing mechanism is connected in the loop of this thermocouple and electromagnetic valve coil, make it to be path in order to control this loop, open circuit or state such as timing path, so that the automatic closed gas path and the dual safe effect of closed gas path regularly with structure, the non-transformer of simplifying most and when reaching stove fire and extinguishing.

2, the flame-out and regular automatical shutoff device of a kind of according to claim 1 Gas appliance is characterized in that wherein this timing mechanism includes:

One soft-touch control is made of a fixed contact and an elastic contact, and this two point is with the lead of this coil respectively and is connected in series and constitutes a loop;

One control lever pivotally is set in place in the pre-position of this switch below with the one end, its free end top be provided with one in order to the protuberance of this elastic contact overlap joint, its below then is extended with a contacting part downward vertically;

One turns round wheels automatically, include a ratch, a spring and gear assembly, the circumference of this ratch is provided with a short slot, this ratch is with the periphery of circumference and the contacting part apical grafting of this control lever, and can be subjected to user's turn and rotate moving predetermined angular, and the elasticity that can utilize its spring return the power of releasing automatically revolution reset so that oppress this elastic contact, make the two point contact of this switch and make the lead conducting with its this control lever of circumference pushing tow; Or go to this control lever contacting part below with its short slot, so that this elastic contact sets back by itself elasticity, thereby the two point of this switch is separated and make lead be off state.