CN207132385U - A kind of gas-cooker - Google Patents

Abstract

A kind of gas-cooker is the utility model is related to, including for opening or closing the magnetic valve of combustion gas, the burner connected with magnetic valve, the ignition electrode and thermocouple being arranged on by burner, it is characterised in that：Two output ends of thermocouple and two feeder ears of magnetic valve are connected, and two output ends of thermocouple also detect circuit by thermocouple electromotive force and connected, and the output end of thermocouple electromotive force detection circuit is connected with control module.Compared with prior art, the utility model has the advantage of：In scheme provided by the utility model, the electronic potential energy of thermocouple normally maintains magnetic valve to inhale energy needed for valve, the circuit of thermocouple electromotive force detection simultaneously can be acquired to thermocouple electromotive force again, judge that burner operation state provides foundation for control module, both the use value of thermocouple had been improved, has also reduced the cost of product.

Description

A kind of gas-cooker

Technical field

It the utility model is related to a kind of gas-cooker.

Background technology

Existing gas-cooker is divided into two classes, and one kind is to use battery powered, and its function is relatively simple, and battery is mainly to pointFirearm power supply makes igniter realize igniting and zero second suction valve；Also one kind is for intelligent stove, and using mains-supplied, civil power is through turningIt is used for lighting a fire after changing, maintains firepower regulation and some other intelligent function.Thermocouple in gas-cooker, only provide normal maintainEnergy needed for magnetic valve suction valve, does not make other purposes.With pursuit of the people to quality of the life and the cost performance of gas-cooker,One kind only general gas stove of igniting and zero second suction valve can not meet user's request；Second class uses the combustion gas of mains-suppliedStove is because its solenoid valve control, operation and other functions use Electronic Control, and its cost is higher, and battery electric quantity can not meet moreThe long-term power supply of individual electronic control module, while under function complex situations, security reliability also collides with each other, while anticipated in peopleCombustion gas and civil power are combined in the presence of very big potential safety hazard in knowledge.

Therefore a kind of battery powered but the gas-cooker with the function such as some anti-dry, health prompt is that consumer is chased afterAsk.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of thermocouple electromotive force energy for above-mentioned prior artThe normal gas-cooker for maintaining energy needed for magnetic valve suction valve to be acquired again to thermocouple electromotive force.

Technical scheme is used by the utility model solves above-mentioned technical problem：A kind of gas-cooker, including for openingOr close the magnetic valve of combustion gas, the burner connected with magnetic valve, the ignition electrode and thermocouple being arranged on by burner, its featureIt is：Two output ends of thermocouple and two feeder ears of magnetic valve connect, and two output ends of thermocouple are also electronic by thermocoupleGesture detection circuit connection, the output end of thermocouple electromotive force detection circuit are connected with control module, and wherein thermocouple electromotive force is examinedSlowdown monitoring circuit includes the first operational amplifier, the second operational amplifier, first resistor, second resistance, 3rd resistor, the 4th resistance,The negative pole of 5th resistance and the 3rd operational amplifier, wherein thermocouple is connected with the in-phase input end of the first operational amplifier, theThe inverting input of one operational amplifier is connected with the output end of the first operational amplifier, and the positive pole of thermocouple is put with the second computingThe in-phase input end connection of big device, the inverting input of the second operational amplifier are connected with the output end of the second operational amplifier,The first end of the output end connection first resistor of first operational amplifier, the second end and the 3rd operational amplifier of first resistorInverting input connects, the first end of the output end of the second operational amplifier connection second resistance, the second end of second resistance withThe in-phase input end connection of 3rd operational amplifier, 3rd resistor are connected to inverting input and the output of the 3rd operational amplifierBetween end, the first end of the 4th resistance is connected with the in-phase input end of the 3rd operational amplifier, the second end ground connection of the 4th resistance；The output end of 3rd operational amplifier connects the first end of the 5th resistance, and the second end of the 5th resistance is connected with control module, controlsMolding root tuber according to thermocouple electromotive force detect circuit output thermocouple electromotive force, judge burner be in have fire or without fire alsoIt is igniting or closes fire or accident extinguishing.

As an improvement, the first resistor is identical with second resistance resistance, 3rd resistor is identical with the 4th resistance, heatThe multiplication factor of galvanic couple electromotive force detection circuit is 3rd resistor divided by first resistor=100, when thermocouple electromotive force detects electricityRoad detects judges there is fire when thermocouple electromotive force is more than 1.5mV, when thermocouple electromotive force detects electric circuit inspection to thermocouple electricityJudge that fire has extinguished when pressure is less than 1.5mV, when thermocouple electromotive force detection electric circuit inspection to thermocouple electromotive force is zero, Zhi HoujianIt is cumulative big and judge burner ignition and successfully more than 1.5mV；When thermocouple electromotive force detection electric circuit inspection is electronic to thermocoupleGesture drops quickly to 1.5mV from much larger than 1.5mV, judges that burner closes fire or accident extinguishing.

Improve again, gas-cooker provided by the utility model also includes the display module being connected with control module.

Improve again, it is control module, display module and thermocouple electromotive force that gas-cooker provided by the utility model, which also includes,The battery of circuit power supply is detected, the side of the magnetic valve is provided with what is disconnected when conducting, closed electromagnetic valve when magnetic valve is openedMicroswitch, the microswitch are connected on battery and detect circuit power supply for control module, display module and thermocouple electromotive forceOn current supply circuit.

Compared with prior art, the utility model has the advantage of：In scheme provided by the utility model, the electricity of thermocoupleAction potential normally maintains magnetic valve to inhale energy needed for valve, while thermocouple electromotive force detection circuit again can be to thermocouple electromotive forceIt is acquired, judges that burner operation state provides foundation for control module, both improved the use value of thermocouple, also loweredThe cost of product；In addition, in improvement project, using battery powered, when magnetic valve is opened, microswitch turns on, thermocoupleElectricity enters working condition on electromotive force detection circuit, control module and display module, and when closed electromagnetic valve, microswitch breaksOpen, thermocouple electromotive force detection circuit, control module and display module dead electricity are closed, and save battery electric quantity.

Brief description of the drawings

Fig. 1 is that the module of gas-cooker in the utility model embodiment connects block diagram；

Fig. 2 is the circuit theory diagrams that thermocouple and thermocouple electromotive force detect circuit in the utility model embodiment；

Fig. 3 is the control method flow chart of intelligent stove in the utility model embodiment.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing embodiment.

Intelligent stove as described in Figure 1, including for opening or closing the magnetic valve of combustion gas, the burning connected with magnetic valveDevice, the ignition electrode and thermocouple being arranged on by burner, function detection module, the control module being connected with function detection module,The display module being connected with control module, it is the battery of function detection module, control module and display module power supply；Function detectionModule then includes flame detection modules, cooking bottom temperature detection module, pan detection module and battery electric quantity detection module；Magnetic valveSide be provided with turned on when magnetic valve is opened, closed electromagnetic valve when the microswitch that disconnects, the microswitch is connected on batteryOn the current supply circuit powered for function detection module, control module, display module.

The flame detection modules include thermocouple and thermocouple electromotive force detection circuit, shown in Figure 2, thermocouple electricityEMF detection circuit includes the first operational amplifier U1A, the second operational amplifier U2A, first resistor R1, second resistance R2, theThree resistance R3, the 4th resistance R4, the 5th resistance R5 and the 3rd operational amplifier U1B, the wherein negative pole of thermocouple and the first computingAmplifier U1A in-phase input end connection, the first operational amplifier U1A inverting input and the first operational amplifier U1A'sOutput end is connected, and the positive pole of thermocouple is connected with the second operational amplifier U2A in-phase input end, the second operational amplifier U2AInverting input be connected with the second operational amplifier U2A output end, the first operational amplifier U1A output end connection firstResistance R1 first end, first resistor R2 the second end are connected with the 3rd operational amplifier U1B inverting input, the second computingAmplifier U2A output end connection second resistance R2 first end, second resistance R2 the second end and the 3rd operational amplifier U1BIn-phase input end connection, 3rd resistor R3 is connected between inverting input and the output end of the 3rd operational amplifier, the 4thResistance R4 first end is connected with the 3rd operational amplifier U1B in-phase input end, the 4th resistance R4 the second end ground connection；3rdOperational amplifier U1B output end connects the 5th resistance R5 first end, and the 5th resistance R5 the second end is connected with control module.Two feeder ears of the both ends of thermocouple and magnetic valve connect simultaneously.

In the present embodiment, first resistor and second resistance can be using 2K Ω resistance, and 3rd resistor and the 4th resistance canTo use 200K Ω resistance, multiplication factor is 100 times, judges there is fire when detecting that thermocouple electromotive force is more than 1.5mV, works as heatJudge that fire has extinguished when galvanic couple voltage is less than 1.5mV.When thermocouple electromotive force is zero, increases gradually afterwards and sentence more than 1.5mVDisconnected kitchen range igniting and successfully.When thermocouple electromotive force drops quickly to 1.5mV from much larger than 1.5mV, judge kitchen range close fire orAccident extinguishing；Control module is corresponding by having fire, being carried out without fire, igniting, the analysis for the every kind of state for closing fire and accident extinguishingIntelligent control, so that it is guaranteed that control is accurate and reliable.

In the present embodiment, the electromotive force of thermocouple has the parallel output end of the identical electromotive force of two-way, and output end connects all the wayIt is connected on the magnetic valve of control combustion gas conducting, another way output end is connected on thermocouple electromotive force detection circuit.Control combustion gasThe magnetic valve of conducting maintains the adhesive of magnetic valve, gas circuit circulation, in nothing using electromotive force caused by thermocouple in the case where there is fiery stateIn the case of fire, thermocouple produces without electromotive force, and magnetic valve is opened gas circuit and closed.Thermocouple electromotive force detection circuit has " void is disconnected "Characteristic, i.e. the electromotive force of thermocouple is equivalently employed without electric current when being connected to thermocouple electromotive force detection circuit and flows through, therefore completelyValve is inhaled in the maintenance for not influenceing thermocouple electromotive force.

The control method of above-mentioned intelligent stove, comprises the following steps, shown in Figure 3：

Step 1: judge whether magnetic valve is opened, such as magnetic valve opening, microswitch conducting, function detection module, controlModule, display module start power up work, into step 2；Such as closed electromagnetic valve, microswitch disconnects, function detection module,Control module, display module dead electricity are closed, and are then back to step 1；

Step 2: testing result of the control module by battery electric quantity detection module, judges whether battery electric quantity is less than thresholdValue, in this way, display module show that battery electric quantity is low, close flame detection modules, cooking bottom temperature detection module, pan detection mouldBlock；Otherwise, into step 3；

Step 3: fire has been detected whether by flame detection modules, and it is in this way, such as no into step 4, it is functional to close instituteDetection module, control module and display module, return to step one；

Step 4: pan is determined whether by pan detection module, in this way, into step 5, if not being to start no potTiming, judges whether no pot timing time continues one minute, in this way, Guan Huo, close all function detection modules, control module andDisplay module, return to step one, if not being, return to step three；

Step 5: gathering cooking bottom temperature by cooking bottom temperature detection module, judge whether that dry combustion method occurs, in this way, Guan Huo, closeAll function detection modules, control module and display module, return to step one, if not being, return to step three.

Claims (4)

1. a kind of gas-cooker, including for opening or closing the magnetic valve of combustion gas, the burner that is connected with magnetic valve is arranged on combustionIgnition electrode and thermocouple by burner, it is characterised in that：Two output ends of thermocouple and two feeder ears of magnetic valve connect, thermoelectricityTwo even output ends also detect circuit by thermocouple electromotive force and connected, the output end of thermocouple electromotive force detection circuit and controlModule connects, and wherein thermocouple electromotive force detection circuit includes the first operational amplifier, the second operational amplifier, first resistor,Second resistance, 3rd resistor, the 4th resistance, the 5th resistance and the 3rd operational amplifier, the wherein negative pole of thermocouple and the first fortuneCalculate the output end company of the in-phase input end connection of amplifier, the inverting input of the first operational amplifier and the first operational amplifierConnect, the positive pole of thermocouple is connected with the in-phase input end of the second operational amplifier, the inverting input of the second operational amplifier withThe output end connection of second operational amplifier, the first end of the output end connection first resistor of the first operational amplifier, the first electricitySecond end of resistance is connected with the inverting input of the 3rd operational amplifier, the output end connection second resistance of the second operational amplifierFirst end, the second end of second resistance is connected with the in-phase input end of the 3rd operational amplifier, and 3rd resistor is connected to the 3rdBetween the inverting input and output end of operational amplifier, the first end of the 4th resistance and the homophase input of the 3rd operational amplifierEnd connection, the second end ground connection of the 4th resistance；The output end of 3rd operational amplifier connects the first end of the 5th resistance, the 5th electricitySecond end of resistance is connected with control module, and control module detects the thermocouple electromotive force of circuit output according to thermocouple electromotive force,Judge burner be in have fire or without fire or igniting or close fire or accident extinguishing.

2. gas-cooker according to claim 1, it is characterised in that：The first resistor is identical with second resistance resistance, theThree resistance and the 4th resistance are identical, and the multiplication factor of thermocouple electromotive force detection circuit is 3rd resistor divided by first resistor=100, judge there is fire when thermocouple electromotive force detection electric circuit inspection is more than 1.5mV to thermocouple electromotive force, when thermocouple electricityEMF detection circuit, which detects, judges that fire has extinguished when thermocouple voltages are less than 1.5mV, when thermocouple electromotive force detection circuit inspectionIt is zero to measure thermocouple electromotive force, increase and judges burner ignition and successfully more than 1.5mV gradually afterwards；When thermocouple is electronicGesture detection electric circuit inspection drops quickly to 1.5mV to thermocouple electromotive force from much larger than 1.5mV, judges that burner closes fire or meaningIt is outer flame-out.

3. gas-cooker according to claim 2, it is characterised in that：Also include the display module being connected with control module.

4. gas-cooker according to claim 3, it is characterised in that：It is control module, display module and thermocouple also to includeThe battery of electromotive force detection circuit power supply, when the side of the magnetic valve is provided with conducting, closed electromagnetic valve when magnetic valve is openedThe microswitch of disconnection, the microswitch are connected on battery and detect circuit for control module, display module and thermocouple electromotive forceOn the current supply circuit of power supply.