CN2187759Y

CN2187759Y - Electronic igniting safety controller for water heater

Info

Publication number: CN2187759Y
Application number: CN 93240307
Authority: CN
Inventors: 汤文聪
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-28
Filing date: 1993-09-28
Publication date: 1995-01-18
Anticipated expiration: 2003-09-28

Abstract

The utility model relates to an electronic igniting safety controller for a water heater, which controls the sequence switches of an original fire and a main fire of a gas water heater. A single electrode induction needle checks whether the fire is ignited or not and the electronic circuit of the oxygen lack degree, which prevents the short circuit of the outer circuit. An electromagnetic valve of the water heater and a voltage boost ignition circuit perform start and stop actions, which can sense that the main fire is certainty ignited. The original fire gas valve is closed automatically through sequential time delay, which promotes the safety of the water heater. The electronic igniting safety controller for a water heater improves the combustion efficiency, saves the energy, and prolongs the battery life.

Description

Electronic igniting safety controller for water heater

The utility model relates to a kind of igniting safety governor, particularly relate to a kind ofly detecting water heater flame with the unipolar induction pin, and the control solenoid valve for gas opens and closes the electronics linkage point fire safety controller with the water heater of ignition order.

The invention of water heater brings many convenience to the mankind; bring life to threaten to people also; when being installed on indoor confined space because of water heater; often have oxygen content deficiency in the air, and cause gas-fired not exclusively to produce harmful gas, and this class pernicious gas common people are difficult for discovering; improper ventilation in addition again; especially at winter or weather arctic weather, door and window is always closing, and causes the contingency of gas poisoning easily.

Gas water heater in the past, the regulation that the security of gas water heater is had decree because of advanced country, so be equiped with various safety inspection and control device, and this device normally utilizes the thermocouple induction device, can detect the ignition conditions of female fire and main fire, and light action when incomplete when female fire and main fire, generally be only to close main fire gas, female fire is then let alone to leak, and the igniting that keeps, and the result is that fire is not lighted, coal gas has scattered in the houseful, cause danger easily, and constantly light a fire, shortened the life-span of battery; In addition, the portion of hot hydrophone is equiped with flame combustion degree of oxygen deficiency checkout gear, and mostly it is to establish one group of thermocouple induction device, the complexity of relative increase water heater, more cause the difficulty of fit on and the raising of cost, under the situation that you can't have both at the same time, only abandon the anoxic checkout gear.

Main purpose of the present utility model is to provide a kind of electronics linkage point fire safety controller of water heater, and it can finish the detection of anoxic and igniting with an induction electrode by the control of circuit, and can save battery electric power, improves the security of water heater.

According to electronics linkage point fire safety controller provided by the utility model, it includes a timing gauge tap circuit, an anoxic is explosion-proof and flame detector circuit, a gas valve sequential control circuit and a high-tension ignition circuit etc., the time switch control circuit is formed a charging circuit by transistor, resistance and electric capacity, uses to set up DC voltage and promote the power switch circuit be made up of four transistors; Anoxic explosion-proof with flame detector circuit be by single Zhi Chuantong flame induction electrode, cooperate step-up coil, resistance and transistor to produce high-frequency alternating current jointly, using provides a bias voltage holding circuit, the explosion-proof checking circuit of anoxic also includes a low-pass filter circuit, required frequency band signals can be connected to a field-effect transistor, to be used for distinguishing having or not and whether whether short circuit of anoxic and induction electrode of flame; And the gas valve sequential control circuit can be used to control high-tension ignition and promotes the switch of step-up transformer and control female fire and the keying of main thermoelectricity magnet valve, and produces the sequential action female fiery switch of control and produce control signal and make electric current continue to supply; The high-tension ignition circuit then produces the high-frequency ac booster voltage with DC voltage by the saturated oscillator of monocrystalline, high-frequency signal is converted to the low frequency ignition voltage, with the extension wire life-span again.

When the tap of water heater is opened, water is elected water pond by water pipe through hydraulic pressure, and when guide rod up carried, can touch microswitch and be conducting state, the negative pole of GND and circuit is connected, and the gas valve sequential control circuit can be exported a positive voltage and supply with female fire gas valve opening, so that female fire gas to be provided, and conducting high-tension ignition circuit, make it produce electrion and light female fire; And when anomaly,, coal gas too low such as hydraulic pressure is not enough, when insufficient pressure or gas valve fault, female fire can't be lighted always, the then capacitor of time switch circuit meeting continuous discharge, still can't light a fire up to setting-up time, then the time switch circuit can't move turning off power supply (making power interruptions), and stops everything; After female fire is lighted, the explosion-proof flame detector circuit of flame current conducting anoxic, make it produce high voltage and send into the gas valve sequential control circuit, and high voltage signal is divided into three tunnel outputs, one the tunnel with main fire gas valve open, make it light main fire smoothly, another road is then controlled the high-tension ignition circuit and is stopped action, to save battery electric power, last road then perception master fire is lighted the back really and is turned off female fire gas valve, so the control of whole ignition process really, and can prevent that coal gas from leaking and save battery electric power.

Described gas valve sequential control circuit is connected to a transistor, makes electric current continue supply to produce control signal.

When water heater under normal the use, because of burning consumes a large amount of oxygen, if indoor shortage oxygen reaches at 18% o'clock that is lower than oxygen content in the air, the explosion-proof checking circuit of anoxic can detect bias voltage to be reduced, and impels valve controling circuit to turn off with being about to main fire gas valve, and the high-tension ignition circuit continues igniting, female fire gas valve then will be opened again, as continuing oxygen content deficiency in the air, then then everything is stopped, preventing that a large amount of incomplete combustions of coal gas from producing toxic gas.

Be elaborated below by most preferred embodiment and accompanying drawing electronics linkage point fire safety controller to water heater of the present utility model, in the accompanying drawing:

Fig. 1 is a circuit diagram of the present utility model.

Fig. 2 is igniting of the present utility model and gas valve action flow chart.

The electronics linkage point fire safety controller of a kind of water heater of the present utility model, as shown in Figure 1, it includes timing gauge tap circuit 10, the explosion-proof flame detector circuit 20 of anoxic, gas valve sequential control circuit 30 and high-tension ignition circuit 40.

Time switch control circuit 10 comprises a charging circuit and a power switch circuit, charging circuit is made up of two transistor 11,12, two resistance 13,14 and a capacitor 15, uses to set up DC voltage and promote by four transistors, 161,162,163,164 power switch circuits of being formed.

Described charging circuit is made up of two transistor 11,12, two resistance 13,14 and a capacitor 15, the base stage of transistor 11 is connected with the colelctor electrode of transistor 12, charging capacitor 15 is connected between the colelctor electrode and power cathode of transistor 11, one resistance 14 is connected between the common port and power cathode of two-transistor, utilize the conducting of transistor 11 to make capacitor 15 charge and discharge, and trigger transistor 12 conductings, with the pull switch circuit.

Anoxic is explosion-proof to comprise a boost oscillator circuit, a traditional flame induction electrode 21 and a low-pass filter circuit with flame detector circuit 20; Oscillating circuit comprises a transformer 22; one resistance 23 and a transistor 24 common high-frequency alternating currents that produce; the base stage of transistor 24 is connected with time switch control circuit 10 through the coil of resistance 23 and transformer; the output signal of oscillating circuit is coupled to low pass filter through transformer coil; induction electrode 21 is connected in series with transformer coil; diode 25 connecting coil 22 are to the negative pole of power supply; doing the bias voltage protection uses; and mat one resistance 261 and two electric capacity 262; 264 low-pass filter circuits of forming; required frequency band signals is connected to gas valve sequential control circuit 30; being used for distinguishing having or not of flame, and whether whether short circuit of anoxic and induction electrode 21.Described flame induction electrode 21 is a thermistor.

Gas valve sequential control circuit 30 is to receive the explosion-proof different current signals of being exported with flame detector circuit 20 of anoxic by a field-effect transistor 31, controls main fire, female fire and firing circuit respectively and be divided into three the tunnel; Wherein the output of a route field-effect transistor is via resistance 321 and the main fire gas electromagnetic valve 37 of two transistor 322,323 controls; The output of another route field-effect transistor promotes the switch 43 of step-up transformer 41 through resistance 331 and a transistor 332 control high-tension ignitions, Third Road is connected to a transistor 345 generation sequential actions by the output of field-effect transistor through a resistance 341, an electric capacity 342, and the colelctor electrode of transistor 345 connects two transistors again, export a positive voltage by the colelctor electrode of transistor 35, to control female fire gas electromagnetic valve 38; In addition in the first via and be connected to a transistor 36, between the emitter stage of transistor 36 and described on-off circuit, connect a diode, make electric current continue supply to produce control signal.

40 in high-tension ignition circuit produces the high-frequency ac booster voltage with direct current 1.5V voltage by a boost oscillator circuit and the saturated oscillator of a monocrystalline, boost oscillator circuit is made up of a transformer 41, a resistance 42 and a transistor 43, again high-frequency signal is converted to the low frequency ignition voltage, with the extension wire life-span.

As shown in Figure 2, when the tap of water heater is opened, water is elected water pond by water pipe through hydraulic pressure, and when guide rod up carried, can touch microswitch 51 and be conducting state, the negative pole of battery 52 negative poles and circuit is connected, transistor 35 outputs one positive voltage of gas valve sequential control circuit 30 is supplied with female fire gas valve 38 and is opened, so that female fire gas to be provided, and conducting high-tension ignition circuit, make to produce electrion and light female fire; And when anomaly,, coal gas too low such as hydraulic pressure is not enough, when insufficient pressure or gas valve obstacle, female fire can't be lighted always, capacitor 15 meeting continuous discharges by timing gauge tap circuit 10, its time is about 60 seconds, still can't light a fire in 60 seconds up to setting-up time, then timing gauge tap circuit 10 can't move and turn off power supply (making power interruptions), and stops everything.

After female fire is lighted, the explosion-proof flame detector circuit 20 of flame current conducting anoxic, make it produce high potential and send into gas valve sequential control circuit 30, and high potential signal is divided into three tunnel outputs, one the tunnel with main fire gas valve 37, make it light main fire smoothly, another road is then controlled high-tension ignition and is stopped action, last a kind of then perception master fire is lighted the back really and is turned off female fire gas valve, to save battery electric power, so the control of whole ignition process really, and can prevent that coal gas from leaking and save battery electric power.

When water heater under normal the use, because of burning consumes a large amount of oxygen, if indoor shortage oxygen, far below in the air during oxygen content 18%, the explosion-proof checking circuit 20 of anoxic can detect bias voltage to be reduced, and impel the gas valve control circuit to turn off with being about to main fire gas valve, and the high-tension ignition circuit continues igniting, and 38 on female fire gas valve is opened again, as continuing oxygen content deficiency in the air, then then everything is stopped, preventing a large amount of incomplete combustions of coal gas and produce toxic gas.

Can find the utlity model has following effect by above circuit combination and motion flow:

(1), it is only with an induction electrode, cooperate the explosion-proof and flame detector circuit of anoxic, judge the various situations such as main fire, female fire, igniting and anoxic, simplified the complexity of multiple control, and reduce cost, and avoid by varying with temperature the otherness that produces between pure resistance and flame resistance.

(2), anoxic is explosion-proof utilizes conducting flame and unidirectional current to detect with flame detector circuit, thereby be not subjected to moisture, aqueous vapor or the caused coal gas of short circuit fires, and do not have the accident that high-tension ignition causes.

(3), the of short duration undesired situation of flame or when not having of short duration flame, can give the judicious solenoid valve for gas door action of certain timing mode, after the timing of certain hour, determine it is misoperation, then close all solenoid valve for gas doors, stop everything, as be the misoperation of instantaneity, after then treating normally, and can automatically recover regular event.

In sum, the electronic igniting safety controller of water heater of the present utility model, it finishes the safety device of water heater with general cost, and except having igniting action safety control function, have more the explosion-proof function of anoxic, to promote the security of water heater, can raise the efficiency, save electric power, extending battery life.

Claims

1, a kind of electronics linkage point fire safety controller of water heater comprises a time switch control circuit (10), and the time switch control circuit is provided with a charging circuit and a power switch circuit; Charging circuit is used and is set up DC potential and promote the power switch circuit be made up of four transistors, makes the power switch of controller; It is characterized in that: it also comprises an anoxic explosion-proof and flame detector circuit (20), a gas valve sequential control circuit (30) and a high-tension ignition circuit (40);

Anoxic is explosion-proof to include a boost oscillator circuit with flame detector circuit, one induction electrode (21) and a low-pass filter circuit, oscillating circuit comprises a transistor (24) and is connected on transformer (22) on its colelctor electrode, described transistorized base stage is connected with described time switch control circuit (10) through the coil of resistance (23) and transformer, the signal of oscillating circuit is coupled to low pass filter through transformer coil, induction electrode (21) is connected in series with transformer coil, diode series transformer coil is to the negative pole of power supply, protection is used as bias voltage, low-pass filter circuit is connected to the gas valve sequential control circuit with required frequency band signals, in order to having or not of perception flame, whether whether short circuit of anoxic and induction electrode;

Gas valve sequential control circuit (30) includes a field-effect transistor (31), and it receives the explosion-proof different current signals of exporting with flame detector circuit of anoxic, and its output signal is divided into three the tunnel, controls main fire, female fire and firing circuit respectively;

The high-tension ignition circuit produces high-frequency ac booster voltage signal with DC voltage by an oscillating circuit and the saturated oscillator of being made up of a triode (43) and a transformer (41) of a monocrystalline, high-frequency signal is converted to the low frequency ignition voltage again.

2, the electronics linkage point fire safety controller of a kind of water heater according to claim 1, it is characterized in that: described charging circuit is by two transistor (11,12), two resistance (13,14) and a capacitor (15) form, the base stage of transistor (11) is connected with the colelctor electrode of transistor (12), charging capacitor (15) is connected between the colelctor electrode and power cathode of transistor (11), one resistance (14) is connected between the common port and power cathode of two-transistor, utilize the conducting of transistor (11) that capacitor (15) is filled, discharge, and trigger transistor (12) conducting, with the pull switch circuit.

3, the electronics linkage point fire safety controller of a kind of water heater according to claim 1 is characterized in that: the output of a route field-effect transistor of described gas valve sequential control circuit is connected to main fire gas magnetic valve (37) via the transistor (322,323) of resistance (321) and two-phase serial connection.

4, the electronics linkage point fire safety controller of a kind of water heater according to claim 1 is characterized in that: the output of another route field-effect transistor of described gas valve sequential control circuit promotes the switch (43) of step-up transformer (41) through resistance (331) and a transistor (332) control high-tension ignition.

5, the electronics linkage point fire safety controller of a kind of water heater according to claim 1, it is characterized in that: the Third Road of described gas valve sequential control circuit is connected to the action of a transistor (345) generation sequential by the output of field-effect transistor through a resistance (341), an electric capacity (342), the colelctor electrode of transistor (345) is connected in series two transistors again, colelctor electrode by transistor (35) is exported a positive voltage, to control female fire gas valve (38).

6, according to the electronics linkage point fire safety controller of claim 1 or 3 described a kind of water heaters, it is characterized in that: described gas valve sequential control circuit a road in transistor (322,323) and be connected to a transistor (36), between the emitter stage of transistor (36) and described on-off circuit, connect a diode, make electric current continue supply to produce control signal.