CN2476730Y

CN2476730Y - Back fire protection device for domestic gas stove

Info

Publication number: CN2476730Y
Application number: CN 01215786
Authority: CN
Inventors: 邓新华
Original assignee: Zhongshan Huadi Gas Products Co ltd
Current assignee: Zhongshan Vatti Gas Appliance Co Ltd
Priority date: 2001-03-28
Filing date: 2001-03-28
Publication date: 2002-02-13
Anticipated expiration: 2011-03-28

Abstract

The utility model relates to a protection device used for preventing fire return by domestic gas appliances, comprising an induction tunnel of the burner of the gas appliance, a fire return inductor, an ignition controller, a magnetic valve and other components. The magnetic valve is arranged on a gas pipe. The fire return inductor is arranged between the induction tunnel and the ignition controller which are all arranged on the burner of the gas appliance. When a fire return occurs during the burning of the gas appliance, the flame will burn inside the induction tunnel or nearby the mouth of the induction tunnel to make the fire return inductor feel the flame and send signal to the ignition controller. The ignition controller will close the magnetic valve so as to cut off the gas automatically and achieve the aim of protecting appliance and eliminating danger.

Description

A kind of household gas range anti-backfire protective device

The utility model is the anti-backfire protective device of a kind of protective device of household gas range, particularly a kind of household gas range.

Present household gas range is assorted because of the makings of various places, the unstable ubiquity tempering phenomenon of air pressure, and when tempering, often occur because of the user is difficult for realizing that burner, panel burn out, the decrepitate situation of distortion and face glass, this not only influences the normal service life of kitchen range, returns the user and has brought economic loss and danger.

It is a kind of simple in structure, safe and reliable that the purpose of this utility model is to provide, and when kitchen range tempering phenomenon occurs in operate as normal, can cut off fuel gas path automatically, protection kitchen range, the household gas range anti-backfire protective device that eliminates danger.

The technical scheme that realizes the utility model purpose is: the utility model is made up of parts such as burner for gas stove induction tunnel, tempering inductor, ignition controller, magnetic valves, magnetic valve is arranged on the Gas Pipe, and the tempering inductor is arranged between the induction tunnel and ignition controller on the burner for gas stove.

Good effect of the present utility model is: when the tempering situation takes place during in normal combustion gas-cooker; flame will burn near the induction tunnel inner chamber or the injection mouth of pipe; thereby make the tempering inductor feel flame and send signal and give ignition controller; by ignition controller with closed electromagnetic valve; realize cutting off automatically fuel gas path, protection kitchen range, the purpose that eliminates danger.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is an ignition controller theory diagram of the present utility model;

Accompanying drawing 3 is an ignition controller electrical schematic diagram of the present utility model;

The utility model is made up of burner induction tunnel 1, tempering inductor 2, ignition controller 3, magnetic valve 4 as shown in Figure 1, wherein an end of burner is communicated with Gas Pipe 14, magnetic valve 4 is arranged on the Gas Pipe 14, tempering inductor 2 one ends link to each other with burner induction tunnel 1, the other end links to each other with ignition controller 3, the upper end of ignition controller 3 is provided with high pressure lead-out wire 15, and high pressure lead-out wire 15 connects the high-field electrode on the furnace end of gas cooker; There are 5 connecting lines the lower end of ignition controller 3, and wherein one connects power supply, and one connects 4, one of magnetic valves and connects under-voltage indicator lamp, also has two and connects switch; Ignition controller 3 right sides are provided with flame and detect connecting line 16, and this connecting line connects the burner of gas-cooker.As shown in Figure 2, ignition controller 3 partly is made up of single-chip microcomputer 5 and the high-tension ignition circuit 6 that links to each other with single-chip microcomputer 5, flame detection circuit 7, tempering control circuit 8, driving circuit for electromagnetic valve 9, crystal oscillating circuit 10, zero clearing reset circuit 11, on-off circuit 12, under-voltage indicating circuit 13 etc.As shown in Figure 3, on-off circuit 12 is made up of K1, K2,5R1,5R2,5R3,5R4,5R3 and 5R4 one termination single-chip microcomputer 5, another termination K1, K2,5R1,5R2 one termination K1, K2, other end ground connection; Crystal oscillating circuit 10 is X, one termination single-chip microcomputer 5, other end ground connection; Zero clearing reset circuit 11 is formed by connecting by 7R1 and C14,7R1 one termination power, and the other end connects single-chip microcomputer 5, C14 one termination single-chip microcomputer 5, other end ground connection; High-tension ignition circuit 6 is made up of B1, B2, B3, D4, D5, D6, D7, DW3, T2, T3, T4, T5, Q1, Q2,3R1,3R2,3R3,3R4,3R5,3R6,3R7,3R8,3R9,3R10, C11 and C12, D4,3R5,3R6 one termination single-chip microcomputer, the other end links to each other with other device in the high-tension ignition circuit 6, high-field electrode one end of B2, B3 is by 3R8 ground connection, and the other end is drawn out on the high-field electrode pin of burner; Driving circuit for electromagnetic valve 9 is made up of D8, D9, D10, D11, D12, T6, T7,4R1,4R2 and C13, D11,4R2 one termination single-chip microcomputer 5, the other end links to each other with other device in the driving circuit for electromagnetic valve 9, and the colelctor electrode of T6, T7 connects the strong suction coil of magnetic valve 4 respectively and keeps coil; Flame detection circuit 7 is made up of IC2-1, IC2-2, B1,1R1,1R2,1R3,1R4,1R5,1R6,1R7,1R8,1R9,1R10,1R11,1R12,8R1,8R2, C1, C2, C3, C4, C5, C6, DW1, DW2, T1 and D3, the output of IC2-1, IC2-2 connects single-chip microcomputer 5,1R1,1R7 one termination flame detect pin, and the other end links to each other with other device in this circuit; Tempering control circuit 8 is made up of B1, T1, D3,8R1,8R2,6R1,6R2,6R3,6R4,6R5, DW4, C15, C16, C17, IC2-4; Under-voltage indicating circuit 13 is made up of 2R1,2R2,2R3,2R4,2R5,2R6, IC2-3, D1, C6, C7, C8, D1,2R1,2R2,2R5 one termination power, the other end links to each other with other device in this circuit, the IC2-3 output links to each other with single-chip microcomputer 5, under-voltage indicator lamp one end ground connection, another termination 2R6,2R6 link to each other with single-chip microcomputer 5 again.

The utility model is when connecting power supply opening on-off circuit 12, single-chip microcomputer 5 in the ignition controller 3 gets electric work, crystal oscillating circuit 10 starting of oscillations, by zero clearing reset circuit 11 single-chip microcomputer is resetted, drive high-tension ignition circuit 6 by single-chip microcomputer 5 then, the oscillating circuit starting of oscillation that T2 and B1 are formed, give B2 again, output high-tension ignition electric arc after the B3 transformation, single-chip microcomputer 5 driving driving circuit for electromagnetic valve 9 make magnetic valve 4 inhale valves and open fuel gas path simultaneously, combustion gas is lighted when combustion gas enters burner induction tunnel 1 and runs into high-tension ignition electric arc, flame detection circuit 7 detects IC2-1 behind the flame, the output signal of IC2-2 changes, this variable signal gives driving circuit for electromagnetic valve 9 to keep the attracting state of magnetic valve 4 signal feedback after being received by single-chip microcomputer 5, thereby make kitchen range enter operate as normal, in the kitchen range normal work period, single-chip microcomputer 5 inputs are detecting the signal of IC2-4 output in the tempering control circuit 8 always, in case when burner generation tempering, tempering inductor 2 sends signal at once to tempering control circuit 8 after sensing flame, after tempering control circuit 8 receives the signal that tempering inductor 2 sends, the output end signal of IC2-4 will change, this variable signal through single-chip microcomputer 5 closing driving circuit for electromagnetic valve 9, thereby magnetic valve 4 cuts out to cut off fuel gas path.When cell voltage in use occurring when not enough, the IC2-3 output of under-voltage indicating circuit 13 will send signal and light under-voltage indicator lamp for single-chip microcomputer 5, changes battery with the prompting user.

The utility model is owing to increased the tempering control circuit in ignition controller, link to each other with igniter by the tempering inductor again, the generation that makes it when tempering, to cut off fuel gas path rapidly and prevented tempering phenomenon, avoided kitchen range at work because of the decrepitate phenomenon of the burning out of burner that tempering causes, panel, distortion and face glass takes place, prolonged the normal service life of kitchen range, eliminated the user because of caused economic loss of tempering and the caused danger of tempering.The utility model can be used on the various gas-cookers.

Claims

1. household gas range anti-backfire protective device; it is characterized in that it is made up of burner for gas stove induction tunnel (1), tempering inductor (2), ignition controller (3), magnetic valve parts such as (4); magnetic valve (4) is arranged on the Gas Pipe, and tempering inductor (2) is arranged between the induction tunnel (1) and ignition controller (3) on the burner for gas stove.

2. household gas range anti-backfire protective device according to claim 1 is characterized in that ignition controller (3) wherein is made up of single-chip microcomputer (5) and the high-tension ignition circuit (6), flame detection circuit (7), tempering control circuit (8), driving circuit for electromagnetic valve (9), crystal oscillating circuit (10), zero clearing reset circuit (11), on-off circuit (12), the under-voltage indicating circuit parts such as (13) that link to each other with single-chip microcomputer (5).

3. household gas range anti-backfire protective device according to claim 2, it is characterized in that on-off circuit (12) wherein is made of 5R3 and 5R4 one termination single-chip microcomputer (5), another termination K1, K2 K1, K2,5R1,5R2,5R3,5R4,5R1,5R2 one termination K1, K2, other end ground connection; Crystal oscillating circuit (10) is X, one termination single-chip microcomputer (5), other end ground connection; Zero clearing reset circuit (11) is formed by connecting by 7R1 and C14, and 7R1 one termination power, the other end connect single-chip microcomputer (5), C14 one termination single-chip microcomputer (5), other end ground connection; High-tension ignition circuit (6) is made up of B1, B2, B3, D4, D5, D6, D7, DW3, T2, T3, T4, T5, Q1, Q2,3R1,3R2,3R3,3R4,3R5,3R6,3R7,3R8,3R9,3R10, C11 and C12, D4,3R5,3R6 one termination single-chip microcomputer (5), the other end links to each other with other device in the high-tension ignition circuit (6), high-field electrode one end of B2, B3 is by 3R8 ground connection, and the other end is drawn out on the high-field electrode pin of burner; Driving circuit for electromagnetic valve (9) is made up of D8, D9, D10, D11, D12, T6, T7,4R1,4R2 and C13, D11,4R2 one termination single-chip microcomputer (5), the other end links to each other with other device in the driving circuit for electromagnetic valve (9), and the colelctor electrode of T6, T7 connects the strong suction coil of magnetic valve (4) respectively and keeps coil; Flame detection circuit (7) is made up of IC2-1, IC2-2, B1,1R1,1R2,1R3,1R4,1R5,1R6,1R7,1R8,1R9,1R10,1R11,1R12,8R1,8R2, C1, C2, C3, C4, C5, C6, DW1, DW2, T1 and D3, the output of IC2-1, IC2-2 connects single-chip microcomputer (5), 1R1,1R7 one termination flame detect pin, and the other end links to each other with other device in this circuit; Tempering control circuit (8) is made up of B1, T1, D3,8R1,8R2,6R1,6R2,6R3,6R4,6R5, DW4, C15, C16, C17, IC2-4; Under-voltage indicating circuit (13) is made up of 2R1,2R2,2R3,2R4,2R5,2R6, IC2-3, D1, C6, C7, C8, D1,2R1,2R2,2R5 one termination power, the other end links to each other with other device in this circuit, the IC2-3 output links to each other with single-chip microcomputer (5), under-voltage indicator lamp one end ground connection, another termination 2R6,2R6 link to each other with single-chip microcomputer (5) again.