CN2256071Y

CN2256071Y - Alarm and ignitor for die-out and oxygen inadequacy of househole gas burner

Info

Publication number: CN2256071Y
Application number: CN 96206305
Authority: CN
Inventors: 胡国定; 顾志泉; 邬良全
Original assignee: SONGYANG GAS APPLIANCE CO Ltd NINGBO
Current assignee: SONGYANG GAS APPLIANCE CO Ltd NINGBO
Priority date: 1996-03-06
Filing date: 1996-03-06
Publication date: 1997-06-11
Anticipated expiration: 2006-03-06

Abstract

The utility model relates to an alarm and igniter for die-out and oxygen inadequacy of a household gas burner, which is composed of a burner, a flame sensor, the ion current detection circuit of a power circuit, a discrimination circuit, a pulse ignition circuit, and a time delay alarm circuit, and is characterized in that a flame ion detection circuit is composed of a flame ion probe (7) which serves as the positive pole of an electric field, the burner which serves as the negative pole of the electric field, and a voltage comparator. The control circuit of the utility model has the advantages of simple structure and rapid reaction. Reignition can be completed within 0.2 second. The reignition can not be completed within 3 seconds, alarm can immediately start. The utility model is a new device for the security protection of the household gas burner.

Description

The flame-out warning with anoxic of household gas apparatus reaches igniter again

The utility model relates to a kind of combustion gas tool safety guard, particularly flame-out about the combustion gas tool or controller that anoxic is reported to the police and refired.

In the prior art, generally be used for the sensing controler that combustion gas tool accident extinguishing is reported to the police and refired, mainly contain gas sensor, photoelectricity or pyroelectric effect element and make detecting unit, their shortcoming is a poor reliability, be subject to disturb, service life is short and sensitivity is low, can't use in actual product.CN2067371 proposes to do with thermocouple the scheme of detecting element, progressive to some extent aspect reliability and service life, but the hot inert of thermocouple is big, slow in reacting to the flame burning situation, the flame-out a large amount of coal gas of moment of combustion gas tool are leaked, the accident that may cause detonation when lighting a fire again takes place, and therefore is badly in need of a kind of sensor and device thereof of quick tracking.

The purpose of this utility model is the defective at above-mentioned prior art; design a kind of fast reaction that has; can be flame-out or the moment picked up signal of anoxic in combustion gas; the controller that the combustion gas tool is lighted a fire immediately again; and have the warning device of abnormal conditions, use the new equipment that safeguard protection is provided for household gas apparatus.

The designed technical scheme of the utility model is, the flame-out warning with anoxic of household gas apparatus reaches igniter again, it is made up of burner, flame sensor, power circuit, gas current testing circuit, judging circuit, pulse firing circuit and delayed alarm circuit, link to each other with power circuit with the burner of making another utmost point of electric field by the flame ion probe of making electric field one utmost point and to constitute the flame ion testing circuit, one end of flame ion probe links to each other with the judging circuit input, and the output of judging circuit links to each other with the input of pulse oscillation circuit and delayed alarm circuit respectively.

Domestic gas such as oil liquefied gas, carbon gasification closes the ion in the gas premixed flame, be to cause by the chemical reaction that comprises neutral intermediate to produce, under no electric field existence condition, the production rate of ion and recombination rate equate, when applying electric field in flame, charged particle bump electrode produces gas current, in household gas apparatus, burner is connected with power cathode, above fire hole the metal needle that links to each other with positive source being set is detection head, when no flame, no gas current thereby no current pass through between detection head and burner, detect the electric field that forms between pin and burner when flame is arranged and make formation gas current in the flame, be that only need detect several microamperes electric current can conclude above the burner fire hole whether flame is arranged in the present design in actual device, through judging circuit in the device and high-voltage pulse igniting, circuit is realized igniting again in 0.2 second, do not report to the police if in 3 seconds, do not light promptly, guarantee user security with reaction speed the most efficiently, this is an advance of the present utility model, this machine knot is simple in addition, and element lacks reliability and all is significantly improved service life.

Fig. 1 is a structure frame principle figure of the present utility model

Fig. 2 is controller circuitry figure

1 is the gas current testing circuit among the above-mentioned figure, and 2 is judging circuit, and 3 is the high-voltage pulse firing circuit, and 4 is delay circuit, and 5 is warning circuit, and 6 are the igniting pin, and 7 is ion probe, and 8 is burnt gas switch, and 9 is burner, and 10 is power supply.

The 26S Proteasome Structure and Function of embodiment is described below in conjunction with accompanying drawing.

The flame ion testing circuit is made up of burner (9), the power supply (10) of the ion probe of making the electric field positive pole (7), electric field negative pole, ion probe (7) other end links to each other with the input of gas current testing circuit (1), and burner (9) links to each other with the negative pole of power supply (10) and forms electric field between ion probe (7) and the burner (9).Ion probe (7) other end is through resistance R ₀With voltage comparator ic ₁2 pin join, battery pack (10) is anodal through resistance R ₁Be connected to R ₀With IC ₁1 pin make reference potential.IC ₁Form judging circuit (2) with peripheral resistance.During flame combustion, the charged particle that produces by burning under electric field action, from ion probe (7) through R ₀Produce pressure drop, input IC ₁2 pin level ratio, 1 pin low, make 3 pin be in electronegative potential, ion probe (7) no current input when flame-out, R ₀No pressure drop produces, and makes IC ₁2 pin level ratio, 1 pin height, 3 pin are in high potential.

Impulse hunting firing circuit (3) is made up of transformer B1 and B2, triode BG3 diode D2, D3 capacitor C 2, C3 and controllable silicon SCR, works as IC ₁3 pin electronegative potentials the time BG1 end, pulse oscillator is not worked, be the previous combustion device be in the normal combustion state this moment.When burner (9) is in first igniting or when flame-out, since the input of ion probe (7) no current, IC ₁2 pin voltage ratios, 1 pin height, IC ₁3 pin output high potential, make the BG1 conducting, to the B1 power supply, the impulse hunting ignitor oscillation produces the high-tension ignition spark, by B2 level (6) burner (9) is lighted a fire or flame-out after light a fire again automatically.

Delay circuit (4) is by resistance R ₆, capacitor C 1, voltage comparator ic ₂, resistance R ₁₀And R ₁₁Form.Warning circuit (5) is by triode BG2, music integrated circuit IC3, resistance R ₁₂And R ₁₈And buzzer Y forms.Work as IC ₁3 pin because burner (9) is flame-out when becoming high potential, ignition process is carried out in pulse oscillator work on the one hand, is both and passes through R ₆The charging gradually of C1 is produced one section time-delay, through 3 second IC ₂6 pin current potentials be higher than 5 pin, make 4 pin output high level, the BG2 conducting, music integrated block IC 3 work, buzzer work is reported to the police, and reminds user's burner that fault is arranged, and takes care.

Anoxycausis is reported to the police, and the combustion gas tool is under normal oxygen supply situation, and flame is relatively stable, and the length of flame keeps relative stability, the charged particle that produces by burning under the steady electric field effect, the ion probe of flowing through (7), electric current keeps certain value, through R ₀The pressure drop that produces is also relatively stable, can make IC basically ₁3 pin be in electronegative potential, thereby BG1 is ended, high-voltage pulse igniter and alarm be off position all, if during anoxycausis, drawing-down is elongated gradually with oxygen content decline in the air for flame, and ion populations reduces in the unit volume between ion probe (7) and burner (9), flows to R ₀Charged particle descend R ₀Pressure drop diminishes, IC ₁2 pin incoming levels than 1 pin height, make IC ₁3 pin output high level, the high-voltage pulse igniter is at first worked, the alarm work that enters is reported to the police after 3 seconds, so this machine also has warning function to anoxycausis.

K switch and gas valve (8) generally are to be designed to linkage function, also can be provided with respectively as shown in Figure 1.

The flame ion testing circuit also can connect battery pack (10) negative pole by ion probe, and burner (9) connects the anodal ion electric field that forms between ion probe (7) and the burner (9) of battery pack (10), burner (9) and resistance R ₀Input link to each other.IC ₁2 pin inputs and outside reference voltage need reset, other circuit structures and the course of work no longer repeat to aforementioned similar substantially.

Claims

1, the flame-out warning with anoxic of household gas apparatus reaches igniter again, it is by burner (9), flame sensor (7), power circuit (10), gas current testing circuit (1), judging circuit (2), pulse firing circuit (3) and delayed alarm circuit (4,5) form, it is characterized in that linking to each other with power circuit (10) and constitute the flame ion testing circuit by the flame ion probe (7) of making electric field one utmost point and the burner of making another utmost point of electric field (9), one end of flame ion probe (7) links to each other with judging circuit (2) input, the output of judging circuit respectively with pulse oscillation circuit (3) and delayed alarm circuit (4,5) input joins.

2, household gas apparatus as claimed in claim 1 is flame-out and anoxic is reported to the police and igniter again, it is characterized in that the flame ion testing circuit is by the burner (9) and the resistance R that link to each other with battery pack (10) negative pole with the anodal ion probe (7) that links to each other of battery pack (19) ₀, R ₁, R ₂, R ₃Form, ion probe (7) other end is through resistance R ₀With voltage comparator IG ₁2 pin join, battery pack (10) negative pole is through resistance R ₂With IG ₁1 pin link to each other resistance R ₂And R ₃Form IC ₁Reference potential.

3, household gas apparatus as claimed in claim 1 is flame-out and anoxic is reported to the police and igniter again, it is characterized in that delay circuit (4) is by resistance R ₆, capacitor C 1, voltage comparator ic ₂, resistance R ₁₀And R ₁₁Form.

4, household gas apparatus as claimed in claim 1 is flame-out and anoxic is reported to the police and igniter again, it is characterized in that warning circuit (5) is by triode BG2, music integrated circuit IC3, resistance R ₁₂, R ₁₃And buzzer Y forms.