WO1998033019A1 - Procede de fabrication de detecteur de flammes et dispositif de securite pour cuisiniere a gaz utilisant ce dernier - Google Patents

Procede de fabrication de detecteur de flammes et dispositif de securite pour cuisiniere a gaz utilisant ce dernier Download PDF

Info

Publication number
WO1998033019A1
WO1998033019A1 PCT/CN1998/000013 CN9800013W WO9833019A1 WO 1998033019 A1 WO1998033019 A1 WO 1998033019A1 CN 9800013 W CN9800013 W CN 9800013W WO 9833019 A1 WO9833019 A1 WO 9833019A1
Authority
WO
WIPO (PCT)
Prior art keywords
flame
circuit
level
resistor
node
Prior art date
Application number
PCT/CN1998/000013
Other languages
English (en)
Chinese (zh)
Inventor
Fan Zhang
Original Assignee
Fan Zhang
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fan Zhang filed Critical Fan Zhang
Priority to AU57467/98A priority Critical patent/AU5746798A/en
Publication of WO1998033019A1 publication Critical patent/WO1998033019A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/102—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/08—Household apparatus

Definitions

  • ⁇ ⁇ ⁇ Ming relates to a method for preparing a flame sensor and a burning appliance safety protection device using the method, in particular to flameout protection of the burning appliance, and belongs to the field of burning safety protection devices for mechanical engineering.
  • the safety device of the burner is equipped with a flame sensor.
  • the weak conductivity of the flame ions can be used to produce so-called DC ions and AC ions supplied with a flame ion probe supplied with a DC power supply or a flame ion probe supplied with an AC power supply.
  • the AC ion flame sensor is widely used in gas water heaters. Its shortcomings are: the AC probe signal source of the flame probe is generated by an electronic oscillator and a step-up transformer.
  • the transformer is relatively bulky and inefficient, and its primary side often consumes more than 3 milliamps of dry batteries.
  • each flame sensor must match a corresponding AC detection signal source, so it is difficult to popularize it on a gas stove with multiple burners that needs to work for a long time.
  • CN94220618 proposed a multi-fire head gas appliance rapid safety protection device, and its shortcomings are: the circuit structure is complicated, and the electromagnetic valve operating condition design is unreasonable; CN93241755 proposes a bimetal sheet and a permanent magnet cross-linking
  • the shortcomings of the flameout protection device in the middle of the function are: the flameout protection has a long thermal inertia delay, the valve structure is relatively complicated, and each burner must be equipped with a corresponding flameout solenoid valve.
  • Mingming is to overcome the shortcomings of the prior art mentioned above, and provide a circuit structure that directly provides a detection signal source from one electronic oscillator to one or more monitored burner flame ion probes without using a step-up transformer.
  • Another object of the present invention is to provide two kinds of safety devices for burning appliances with simple circuit structure, reasonable function and expandability, fast and reliable protection, low manufacturing cost, no power consumption in normal time, and minimal power consumption during combustion operation.
  • the third object of the present invention is to provide a magnetic holding solenoid valve for use with a safety protection device for a gas appliance, which has a manual valve opening, does not consume power in the valve opening state, and consumes only 0.15 to 0 when the valve is closed.
  • the pulse working current of about 2A / 20mS has a simple and mature structure and technology, low cost, small size, and high reliability.
  • the object of the present invention can be achieved by the following measures:
  • a method for preparing a flame sensor which uses one or more traditional flame ion probes to sample the flames of one or more monitored burner fire heads, is characterized by: setting two DC power sources E connected in series, and E 2 , wherein the negative electrode of 5, and the positive electrode of E 2 are connected to form the reference ground point G; one or more of the burner head 105 has high temperature resistance on at least one side of the flame of the flame ion probe immediately adjacent to the flame A casing or casing gasket or nozzle flame baffle made of conductive material is connected to point G; a detection circuit 112 is provided for each burner head 105, wherein a resistor R 2 and a diode D, The anode is connected to node 107, and the cathode of the latter is connected to a parallel circuit of a resistor R and a capacitor C to node 108, and the other end of the parallel circuit R and C is connected to point G,
  • a flame ion probe 103 is connected to the node 107, and an end of the flame near the nozzle flame is connected to the burner head 105.
  • the shell or shell Pad or flame spout flame guard having a suitable width / space of the air gap 104, element R 2 - 103- 104- 105 constitutes a second branch of said detection circuit;
  • self-excited oscillator is a free electron transformer 101 continuously outputs a square wave or a sine wave or a triangular wave or a sawtooth wave or a step wave or a sequential pulse wave or the like through its output terminal 102 and the resistor R 2 connected to it and during the monitoring process to the detection circuit 112 Any waveform signal in the waveform, as long as its swing amplitude 1 level is equal to or slightly less than the positive voltage value + V of the DC power supply E.
  • the swing amplitude of 0 level is equal to or slightly higher than the negative voltage value of the DC power source-V; D ; a level detection circuit 106 is provided, and its input terminal and node 108 Are connected, select the capacity of the capacitor C and the resistor 1, the threshold value of the level detection circuit 106, and the output waveform and frequency of the electronic oscillator 101, and make the resistance of the resistor R 2 values greater than 1-5 ⁇ , the resistor R, R 2 sufficiently larger than the resistance value obtained on the flame being monitored can 109 in the level discriminators circuit output terminal 106, a total of two kinds of the flame is extinguished Different logic signals; an electronic switch or voltage comparator 1 10 is provided, the input end of which is connected to node 107, and the potential difference between the output signal swing of node 107 and output terminal 102 is monitored by monitoring the potential difference between the two signals or the above two points A reverse current 1 3 occurs between, that is, the flame / air gap 1 04 can be obtained on the output terminal of the electronic switch or voltage comparat
  • the level detection circuit 106 is an electronic switch with a threshold value.
  • the electronic switch is a phase inverter, the monitored flame output at the output terminal 1 09 is 0 level, and the flame extinction is 1 Level logic signal.
  • the electronic switch 110 is an inverter or a non-inverter or the voltage comparator 110 is an operational amplifier, the flame / air gap 104 can be obtained by conducting electricity other than the flame on its output terminal 1 1 1.
  • the output is a 1/0 alternate level logic signal.
  • Each independent sensor detects the circuit 112 and matches a common level-amplifier circuit 106 ', which has a positive-or gate or a positive-or-negative circuit with an n-line input terminal.
  • a logic signal with an output of 0 level or 1 level can be obtained at the output terminal 109 'of the level detection circuit 106'; when any one or more of the burner fire head 105 flames are extinguished, the output A logic signal with an output of 1 level or 0 level can be obtained at the terminal 109 ';
  • a common electronic switch or voltage comparator 1 10' is provided, which is a positive NOR circuit with an n-line input terminal, when When any one or more of the flame / air gaps 104 that are monitored are short-circuited by a conductor other than a flame, they can be connected to the output terminals of the inverter 1 14 connected to the voltage comparator 110 ′. Get a logic signal with an output of 1/0 on 15.
  • a method for preparing a flame sensor which uses one or more traditional flame ion probes to sample the flames of one or more monitored burner fire heads, is characterized by: setting two DC power supplies connected in series, and The negative electrode of 8, and the positive electrode of E 2 are connected to form the reference ground point G; one or more of the burner fire head 105 is made of a high temperature resistant conductive material on at least one side of the flame of the flame ion probe immediately adjacent to the flame.
  • the flame baffle of the nozzle of the casing or the body liner is connected to the G point; for each burner head 105, a detection circuit 1 1 2 is provided, wherein a resistor R 2 is connected to the anode of a diode at the junction At point 107, a capacitor is connected across the cathode of the diode D, and point G, and the components R 2 -D -C, that is, the first branch of the detection circuit, a flame ion probe 103 and a junction point 107 is connected, proximate one end of the spout a flame of the burner housing direct fire or flame spout housing liner or baffle 105 having a suitable width flame / gap space 104, element R 2 - 1 03— 10 4—105 constitute the second circuit of the detection circuit; a self-excited electronic oscillator 101 without a transformer passes its output terminal 102 and the resistor R 2 connected to it and sends it to the monitoring circuit during the monitoring process.
  • the detection circuit 112 continuously outputs any waveform signal such as a square wave, a sine wave, a triangle wave, a sawtooth wave, a step wave, or a sequence pulse wave, as long as the swing level 1 level is equal to or slightly less than the DC power source.
  • the positive voltage value of E, + V UD , its swing level 0 level is equal to or slightly higher than the negative voltage value of the DC power supply E 2 -V. .
  • a level detection circuit 106 whose input terminal is connected to the node 108, and adjusting the capacity of the capacitor, the threshold value of the level detection circuit 106, and the output waveform of the electronic oscillator 101 and frequency, and the resistance of the resistor is greater than 1-5 ⁇ , the resistor R, sufficiently larger than the resistance value of R 2, to the upper level discriminators circuit 106 output terminal 109 is obtained.
  • An electronic switch or voltage comparator 1 1 0 is set, and its input terminal is connected to the node 107.
  • the level discrimination circuit 106 is an electronic switch with a threshold. When the electronic switch is a phase inverter
  • the logic signal of the monitored flame burning output to be 0 level and flame extinguishing to 1 level can be obtained on its output terminal 109.
  • the electronic switch 1 10 is an inverter or a non-inverter or the voltage comparator 1 10 is an operational amplifier
  • the flame / air gap 104 can be obtained by conducting electricity other than the flame on its output terminal 1 1 1
  • the output is a logic signal with an alternating level of 1/0.
  • n independent said sensor detection circuits 1 12 should be provided and matched with a common said level discriminating circuit 1 06 ', which has a positive OR gate with n line input ends.
  • NOR circuit when all the burner heads 105 are burning normally, a logic signal with an output of 0 level or 1 level can be obtained on the output terminal 109 'of the level detection circuit 106'; when any When one or more of the burner head 105 flame is extinguished, a logic signal with an output of 1 level or 0 level can be obtained on the output terminal 109; a common electronic switch or voltage comparator is provided.
  • 1 1 0 ' which is a positive NOR circuit with an n-line input terminal.
  • any one or more of the flame / air gaps 104 to be monitored is shorted by a conductor other than a flame, it can be connected to A logic signal having an alternating level of 1/0 is obtained on the output terminal 115 of the inverter 1 14 after the voltage comparator 1 10 ′.
  • a method for preparing a flame sensor which uses one or more traditional flame ion probes to sample the flames of one or more monitored burner fire heads, is characterized by: setting two DC power sources E connected in series, and E 2 , wherein the negative electrode of E and the positive electrode of E 2 are connected to form a reference ground point G; one or more of the burner head 105 is resistant to at least one side of the flame of the nozzle immediately adjacent to the flame ion probe high temperature electrically conductive material of the pad or housing or housing spout flame guard and is connected to the point G; for each of a direct fire burner 105 are provided a detection circuit 112, wherein a resistor 12 and a diode D, The anode phase is connected to the node 107, an electric «is connected across the cathode of the diode D, and the point G, and the elements R 2- D, once constituted, constitute the first branch of the detection circuit, A flame ion probe 103 is connected to the node 107, and an end of the flame near
  • any waveform signal such as a square wave, a sine wave, a triangle wave, a sawtooth wave, a step wave, or a sequence pulse wave is continuously output to the detection circuit 112, as long as the swing amplitude 1 level is equal to or It is slightly less than + V of the positive voltage value of the DC power supply. . Which swings the 0 level equal to or slightly positive value of the DC power supply negative voltage of a V.
  • a level detection circuit 106 is provided, the input end of which is connected to the node 108, the resistance value of the resistor ⁇ , the threshold value of the level detection circuit 106, and the electronic oscillator 101 are selected.
  • the output waveform of the frequency, and the resistance of the resistor R 2 is greater than 1- 5 ⁇ , the sufficiently larger than the resistance of resistor 12, and to the electrical output level of the amplitude discriminator circuit 106 obtaining the terminal 109 is monitored flame, the flame is extinguished were two different logic signals; providing an electronic switch or a voltage comparator 110, the input terminal and the node 107 is connected, by monitoring node 107 and the output terminal 1 02
  • the potential difference between the swing amplitude of the output signal or the reverse current between the two points can be output on the output terminal of the electronic switch or voltage comparator 110 or the output of the inverter 1 14 connected behind it.
  • the level detection circuit 106 is an electronic switch with a threshold value.
  • the electronic switch is a phase inverter
  • a logic signal is obtained on its output terminal 109 for the flame output being monitored to be 0 level and the flame extinguishing being 1 level.
  • the electronic switch 110 is an inverter or a phase inverter or the voltage comparator 1 10 is a
  • the flame / air gap 1 04 can be obtained on its output terminal 1 1 1 when it is short-circuited by a conductor other than a flame and the logic signal is output at an alternating level of 1/0.
  • n independent sensor detection circuits 112 should be provided and matched with a common level detection circuit 106 ', which has a positive OR gate or a positive NOR gate circuit with an n-line input terminal.
  • a logic signal with an output of 0 level or 1 level can be obtained on the output terminal 109 'of the level detection circuit 106'; when any one or more of the burners burn When the flame of the device fire head 105 is extinguished, a logic signal with an output of 1 level or 0 level can be obtained on the output terminal 1 09 '; a common electronic switch or voltage comparator 1 1 0' is provided, which has Negative input NOR gate Way, when any one or more of the monitored fire
  • Substitute 26 When the flame / air gap 104 is short-circuited by a conductor other than a flame, logic of an output of an alternating level of 1/0 can be obtained on the output terminal 115 of the inverter 114 connected to the voltage comparator 110 ′. signal.
  • a method for preparing a flame sensor A conventional flame ion probe 103 is used to sample the flame of a monitored burner fire head 105, which is characterized by: setting a DC power source E, whose negative electrode is the reference ground point G;
  • the burner head 105 has a casing or a casing gasket or a nozzle flame baffle made of a high temperature resistant conductive material on at least one side of the nozzle flame adjacent to the flame ion probe, and is connected in parallel with a capacitor and a resistor.
  • the circuit is connected to node 108, and the other end of the parallel circuit is connected to point G; a flame ion probe 103, one end of which is near the nozzle flame and the housing or housing gasket of the burner fire head 105 Or the nozzle flame baffle has a flame / air gap 104 with an appropriate width, elements 103-104 to 105-C, /, that is, a detection circuit 112 ′ constituting the flame sensor, wherein the optimal value of the resistor ⁇ Not less than 1-5M ⁇ ; a self-excited electronic oscillator 101 without a transformer is connected to the flame ion probe 103 through its output terminal 102 and applies electricity to the detection during the entire monitoring process 1 12 'Continuous output of any waveform signal such as square wave, sine wave, triangle wave, sawtooth wave, step wave or sequence pulse, as long as the swing amplitude 1 level is equal to or slightly less than the DC power supply E, The positive voltage value + V DD , its swing amplitude 0 level is equal to or slightly positive
  • the level detection circuit 106 is a threshold An electronic switch or a voltage comparator, when the electronic switch is an inverter or a voltage comparator at the inverting input terminal, the monitored flame output at the output terminal 109 is 0 level, and the flame is extinguished at 1 level.
  • Flat Flame / air gap 104 is shorting conductor than the flame alternating three-level logic signal 1/0.
  • a gas appliance safety protection device includes a flame sensor, an interlock switch of a monitored burner gas control valve, a delay control circuit, a monostable pulse trigger circuit, a power drive circuit, a solenoid valve, a bistable trigger circuit, a photocoupler, An electronic switch and a DC power supply, characterized in that: the flame sensor 01 is one or more of the flame sensors according to claims 1 to 9, and the electronic oscillator 101 uses two cascaded CMOS inverter ICs.
  • a resistor R s is connected to the input terminal of the CMOS inverter IC, a resistor R is connected to the output terminal of the IC, and the input terminal of the IC 2 , and a capacitor C
  • One end of the IC 2 is connected to the output end and the output terminal 102 of the IC 2 , and the other ends of the resistor R s , the resistor R t , and the capacitor C are connected at the same point, thereby forming a low-frequency multi-resonance with low power consumption.
  • One or more of the shell or shell gasket or nozzle flame baffle of the burner fire head 105 is connected to point G of the reference ground, and each burner gas control valve is provided as a set A bipolar interlock switch LK, / LK 2 , 'one of the pole switches L is opened when the gas control valve is opened and closed when the valve is closed, and one end thereof is in phase with the flame ion probe 103 Connected to node 108, the other end of which is connected to point G.
  • the other pole switch LK 2 of the bipolar interlock switch is switched off when the control valve is closed and turned on when the valve is opened.
  • the switches L connected in parallel are connected in series to the positive or negative main circuit of the DC power supply B; one or more diodes 3 ⁇ 4 whose cathodes are respectively connected to the nodes 108 of the detection circuit 112 of the flame sensor 01 Its anode is connected in parallel with a movable 3 ⁇ 4 LAC after being connected in parallel, and the other end of the LAC is connected to the + V DD of the DC power source E, and constitutes an accident simulation test circuit 08;
  • the electrical of the flame sensor flat amplitude discriminator circuit 106 is constituted by two cascaded CMOS inverters 1 and 1 (a 5-phase, the output terminal of the CMOS inverter 109 with the IC 5 is connected to the anode of the diode 03, the diode D 3
  • the cathode is connected in parallel to the node 109 ', and the input terminal of each CMOS inverter IC 4 is connected to A parallel circuit of a capacitor and a resistor or only a capacitor C is connected to
  • the electronic switch or voltage comparator 1 10 ′ is connected by an anode of one or more diodes 0 2 to a node 107 of the flame sensor detection circuit 112, and the cathodes of all the diodes D 2 are connected in parallel
  • a series circuit composed of a resistor R 3 and a resistor ⁇ forms a positive OR gate circuit, the electrical and electrical connection points are connected to the base of the transistor T, and the emitter of the transistor T and the resistor ⁇ The other end is connected in parallel with the node 102, and the collector resistances of the triode T, ⁇ and +. .
  • the collector output terminal 111 of the transistor T is connected to the input terminal of a CMOS inverter IC, the output terminal 115 of the CMOS inverter IC 3 is connected to the anode of an independent diode D 3 , the diode D the cathode 5 and the node 109 'is connected; end of the resistor Rn and the cathode of the diode D 3 is connected in parallel to a node 109', the other end of the resistor and a capacitor C, a resistor Rn and a parallel ⁇ Hfc circuit and a L3 value of the resistor R is connected to the node a, the other end of the resistor R L3 and a CMOS IC inverter input terminal 8 is connected to the junction points b, capacitor Cn and a resistor R parallel circuit The other end is connected to the G point, thereby forming a micro power consumption delay control circuit 02 with a delay of several seconds; one end of a capacitor C l2 is
  • a Darlington T u is connected to the base of the junction point e, the other end of the emission RiH l5 and Darlington transistor is connected to the point G, the collector of the Darlington transistor T u of electromagnetic
  • the valve closing line ⁇ DZF of the valve is connected to the node f, and a freewheeling diode Du and the valve closing coil DZF are connected in parallel to + V.
  • a pulsating power driving circuit 04 is formed and Form a basic burner safety protection control unit circuit 001; the anode of a diode D 2l is an S terminal, which is connected to the output terminal e of the CMOS inverter IC, the cathode of the diode D 21 and the resistor R 3.
  • CMOS XOR gate IC Connected, the other end is connected to a CMOS XOR gate IC, the output end and a resistor R 18 are connected to the node h, the two input ends of the CMOS XOR gate IC, are respectively two diodes
  • the cathode of D critique is connected, and the cathode of one of the diodes D trash is also connected to the cathode of the diode D 21 and a resistor R 3.
  • the other end of the resistor R 3 is connected to the output terminal of the CMOS XOR gate IC.
  • R l8 h and electrically connected to a cathode of the other diode D 22 is by an electrical «R 31 is connected to the point G , Movable between an engagement button LAX and the capacitor C 2. After two connected in parallel across the diode D in parallel to the anode terminal of R 22 and + V.
  • a flip-flop circuit 06 is initiated by a positive pulse ; resistor R l8 and the other end of the resistor Rn and transistors and ⁇ ⁇ 2 base connected to the junction point g, the emitter of the transistor and T 12 is the source resistor R, and the other end 7 and is connected to the point G, the transistor T
  • the collector load of 12 includes a conventional accident sound and light alarm circuit 010 consisting of a light emitting diode and a sounder; a photocoupler 011 drives the light emitting diode D 15 through a current limiting resistor and the accident sound and light alarm circuit 010 and the transistor T l2
  • the collector electrode is connected to node j.
  • the electromagnetic valve is a magnetic protection installed on the gas inlet pipe of the gas appliance Solenoid valve 05, which is provided with a connecting rod that can move axially, the connecting rod passes through the valve body, and the cavity of the solenoid valve and the space outside the valve body are maintained by one or more sealing devices.
  • the convex arc-shaped bead passes through the smooth transition surface and The plane of the inner edge of the bead presses the ejector rod to move inward, thereby forming the bipolar interlock switch I / LK 2 that works in interlock with the gas control valve.
  • a gas appliance safety protection device includes a flame sensor, an interlock switch of a monitored burner gas control valve, a delay control circuit, a monostable pulse trigger circuit, a power drive circuit, a solenoid valve, a bistable trigger circuit, a photocoupler, An electronic switch and a DC power supply, characterized in that: said flame sensor 801 is one of said flame relays according to claims 13 to 14.
  • the electronic oscillator 101 uses two cascaded CMOS inverter ICs, IC 2 , a resistor R s is connected to the input terminal of a CMOS inverter IC, and one is electrically connected to the CMOS inverter IC.
  • the output terminal of I d is connected to the input terminal of the IC 2.
  • One terminal of a capacitor C is connected to the output terminal of the IC 2 and the output terminal 102.
  • the resistor R s , the resistor R, and the capacitor C are connected to each other. Connected to the same point, thereby forming a low-power low-frequency multivibrator 1 01; a CMOS inverter constitutes the level discriminating circuit 1 06 of the flame sensor 801, and a moving button LAC
  • the parallel circuit is bridged between the input terminal of the IC 4 and the G point;
  • the casing or the casing pad or the nozzle flame baffle of the burner burner fire head 105 is connected to the parallel circuit and the input terminal of the 1 (: 4 at the node 1 08, one of the One end of the flame ion probe 103 is connected to the output terminal 102 of the electronic oscillator 101, and the flame ion probe 103
  • the other end of the resistor Ru is connected to a parallel circuit of a capacitor C u and a resistor and a ⁇ H-value resistor Rn at the node a, and the other end of the resistor Ru is connected to a CMOS inverter 1 (:
  • the input terminal of 8 is connected to node b, and the other end of the capacitor Cu and electric R 12 parallel circuit is connected to point G, thereby forming a micro-power delay control circuit 802 with a delay of several seconds; - one end of a capacitor C and an output terminal of the inverter 12 1 (8 connected to the node c, and the other end to an electrical and a CMOS inverter 1 (; 9 is connected to the input end of the node d,
  • the other end of the electrical »RH is connected to + V D ⁇ , thereby forming a monostable pulse trigger circuit 803 with a pulse width of tens of milliseconds; an electrical» and an output terminal of a CMOS inverter
  • DZF valve coil is connected to the node r, a freewheeling diode Du and closing valve and connected to the line between the rings of DZF + V DD to node f, thereby forming a
  • the power driving circuit 804 is operated to form a basic burner safety protection control unit circuit 8001.
  • the solenoid valve is a magnetic holding solenoid valve 805 installed on the gas inlet pipe of the burner.
  • a connecting rod that moves in a direction that passes through the valve body and maintains the necessary airtightness between the cavity of the solenoid valve and the external space of the valve body by one or more sealing devices, and presses the operation of the solenoid valve
  • the handle and the connecting rod move inward and impact the valve stem to make the solenoid valve in a magnetically-maintained, normally-open position without power consumption.
  • One of the solenoid valves, the DZF, and one magnetically held electromagnet 200 are sealed in the valve body. And automatically shut off the gas source under the accident pulse drive with a pulse width of not more than tens of milliseconds.
  • the solenoid valve used in the safety protection device of a gas appliance is characterized in that: the side yoke 4 of the magnetic holding electromagnet 200 sealed in the valve body of the gas control valve is a simple magnet with a circular shape, An axial hole 32 is provided with an inner stop 61 and a smooth inner edge surface 62 at the open top end portion of the circular side yoke; the lower yoke 5 of the magnetic holding electromagnet is a piece A circular hole plate provided with a central shaft hole, and a convex circular ring guide bearing 51 is also provided on the outer side of the shaft hole, and the lower yoke 5 is embedded into the side magnet by a press interference fit.
  • the optimal interference amount is not less than 0.02; the annular flange 63 of the yoke is also provided with two or more uniformly turned inward riveting points 64
  • the outer surface of the moving iron core 8 and the inner surface of the central shaft hole of the guide bearing 51 slide with a small clearance, and at their outer ends are also provided with an embedded in the inner surface of the guide bearing or
  • the annular H-groove on the outer surface of the moving iron core or the stuffing box housing sealed at the end of the guide bearing Solid sealing rings or sealing packing 53; 8 in one end of the movable core bearing against the guide rail 51 is further
  • a limiting surface 81 is provided to control the working stroke of the moving iron core; between the moving iron core 8 and the central shaft hole of the magnetic holding electromagnet coil frame ⁇ and between the magnetic holding electromagnet electromagnetic coil 6 and the sealed
  • the inner wall space of the yoke iron of the magnetic holding electromagnet has a sufficient air gap 33 in order to eliminate the airbag damping phenomenon that may occur when the moving iron core makes axial movement.
  • the upper yoke 1 is a circular yoke with an area equivalent to the projected flat area of the circular guide magnet.
  • An auxiliary magnetic core 2 is provided at a central portion thereof, and an axial center portion outside the auxiliary magnetic core 2 is further provided.
  • a convex cylindrical body 38 and a hollow nut 15 are connected to the cylindrical body 38 as a whole.
  • FIG. 1 Schematic diagram of flame sensor 1 embodiment 2
  • FIG. 10 Schematic diagram of the magnetic holding solenoid valve embodiment
  • Fig. 1 shows embodiment 1 of a schematic diagram 1 of a flame sensor with a monitored burner head.
  • a conventional flame ion probe 103 was used to sample the flame of a monitored burner head 105, and two DC power sources E and E 2 were set in series, where the negative electrode of E and the positive electrode of E 2 were connected Form reference point G.
  • the burner fire head 105 has a casing or a casing gasket or a nozzle flame baffle made of a high-temperature resistant conductive material on at least one side of the nozzle flame of the flame ion probe, and is connected to the G point.
  • a detection circuit 1 12 For each burner head 105, a detection circuit 1 12 is provided: its first branch is connected to the anode of the diode D, at the junction 107, the cathode of the latter is connected in parallel with the resistor ⁇ and the capacitor The circuit is connected to the node 108, the other end of the parallel circuit is connected to the G point, and the element-D '-CJ / R, constitutes the first branch of the detection circuit.
  • the air gap 104 has a value of about 1 to several millimeters, and the element R 2 — 1 03 — 1 04 — 1 05 constitutes a second branch of the detection circuit.
  • a free-running oscillator electronic transformer 101 through its output terminal 102 and the resistor 12 connected thereto and to 112 continuous sine or square wave output of said detection circuit (Semi during monitoring Any triangle wave or sawtooth wave or step wave or sequence pulse wave or any other waveform signal, as long as its swing amplitude 1 level is equal to or slightly less than the positive voltage value + V. D of the DC power supply D , which The swing amplitude 0 level is equal to or slightly higher than the negative voltage value of the DC power supply E 2 -V. u .
  • the input terminal of a level detection circuit 1 06 is connected to the node 1 08, and the selection capacitor ( ⁇ and resistor R).
  • the capacity and level of the threshold amplifier circuit 106 and the output waveform and frequency of the electronic oscillator 101, and the resistance value of the resistor is greater than 1-5M ⁇ , so that the resistance ratio of the resistor R to R 2 is sufficient. Large, for example, about 5 to 10 times, two different logic signals can be obtained on the output terminal 1 09 of the level detection circuit 10 06, the flame being monitored and the flame being extinguished.
  • An electronic switch or voltage comparator The input of 1 1 0 is connected to node 1 07.
  • the monitoring node 107 and the potential difference between the above two or swing output signal at an output terminal 102 for The reverse current ⁇ 3 between them can be obtained on the output terminal 111 of the electronic switch or voltage comparator 110 or on the output terminal 115 of the inverter 114 connected to the flame / air gap 104 outside the flame.
  • the level discrimination circuit 106 is a CMOS gate circuit with a threshold in-phase or inverting output, or a MOS field effect transistor, or a junction field effect transistor, or a transistor, or a single junction transistor, or an IGBT tube, or A Schmitt trigger, or a voltage comparator, or a thyristor, or a switchable thyristor combination triode, or an operational amplifier.
  • a threshold in-phase or inverting output or a MOS field effect transistor, or a junction field effect transistor, or a transistor, or a single junction transistor, or an IGBT tube, or A Schmitt trigger, or a voltage comparator, or a thyristor, or a switchable thyristor combination triode, or an operational amplifier.
  • the second branch of the detection circuit 112 — 103 — 104 — 105 is turned on by the 1 level of the signal source 101 and flows a current 1 2 Since the resistance value of R 2 is selected to be greater than ⁇ 5M ⁇ , which is sufficiently larger than the flame equivalent resistance of the flame gap 104, the node 107 is first clamped to a level close to 0 (for the G point, the same applies hereinafter), and the current can be Considered as a value of 0, the current 1 2 is generally a few tenths of a microampere, so that the output terminal 109 of the non-inverter level detection circuit 106 outputs a 0 level.
  • the electronic switch 110 is a A triode inverter, whose output terminal 110 outputs a 1 / G alternating level signal. If an inverter 114 is connected to the rear side of the electronic switch 110, the power source of the element 114 is connected to + VD . At this time, the logic signal of the flame / air gap "short circuit" accident with an alternate output level of 1/0 can be obtained at the output terminal 115 of the inverter 114.
  • Fig. 2 shows an embodiment of a flame sensor principle diagram 2 with a burner fire head monitored.
  • this embodiment uses a capacitor C to dare to replace the parallel circuit shown in FIG. 1.
  • the capacitor plate voltage that is, The voltage at the node 108 to the reference ground G point
  • the capacitor plate voltage still has a residual value sufficient to maintain the input signal level of the level detection circuit 106, so as to avoid the logic abnormality of the detection circuit 106 caused by the input terminal "floating" accident.
  • the component number, circuit structure and working principle, and output logic level signal of Figure 1 are exactly the same as the description of Figure 1.
  • Fig. 3 shows an embodiment of a flame sensor principle diagram 3 with a burner fire head being monitored.
  • this embodiment replaces the Cj R shown in FIG. 1 with a resistor ⁇ in parallel. Because the input capacitance of the level detection circuit 106 is generally small, the node 108 is not enough to integrate the alternating signal output by the electronic oscillator 101, so when the flame of the monitored burner goes out Only the logic signal with an alternate level of 1/0 can be output on the output terminal 109 of the level discrimination circuit 106. In addition, the component number, circuit structure and working principle of Fig. 3 and the logic signal output during the combustion state are all the same as those of Fig. 1.
  • Fig. 4 shows a second embodiment of a flame sensor principle diagram 1 with more than one burner fire head being monitored. Each burner
  • the fire head is provided with a separate detection circuit 112, but it can share a level detection circuit 106 ', which is a positive OR gate or positive NOR gate circuit with an n-line input terminal, and the remaining related component numbers, circuit structure and working principle And the output level logic signal is exactly the same as the description of FIG. 1.
  • a logic signal of level 0 or 1 can be output on the output terminal 109 'of the level detection circuit 106.
  • a flame sensor with n detection circuits 112 can also be provided with a common electronic switch or voltage comparator 110 ', It is a positive NOR circuit with an n-line input terminal.
  • a flame sensor with n detection circuits 112 can also be provided with a common electronic switch or voltage comparator 110 ', It is a positive NOR circuit with an n-line input terminal.
  • any one or more of the flame / air gap 104 monitored is shorted or opened by a conductor other than the flame, it can be connected to the voltage.
  • the output terminal 115 of the inverter 114 after the comparator 110 ′ obtains two different logic signals of corresponding 1/0 alternate output level and 0 level, and the working principle is exactly the same as that described in FIG. 1.
  • Fig. 5 shows the embodiment of Fig. 4 of a flame sensor with a monitored burner head.
  • a conventional flame ion probe 103 is used to sample the flame of the burner fire head 105 to be monitored, and a DC power source is set with the negative electrode as the reference ground point G.
  • One of the burner fire heads 105 has a casing or a casing gasket or a nozzle flame baffle plate made of a high temperature resistant conductive material on at least one side of the nozzle flame of the flame ion probe, and is formed with the capacitor C1 and the electric R1.
  • the parallel circuit is connected to the node 108 and the optimal value of the electrical appliance R1 is not less than 1 ⁇ 5M ⁇ .
  • the other end of the parallel circuit is connected to the G point.
  • a flame ion probe 103 is located near the nozzle flame.
  • One end of the housing or housing gasket or nozzle flame baffle of the burner head 105 has a flame / air gap 104 of an appropriate width, with a value of about 1 to several millimeters, and a self-excited electron without a transformer.
  • the oscillator 101 notifies its output terminal 102 to be connected to the other end of the flame ion probe 103 and continuously outputs a square wave or a sine wave to the element 103-104-105-d II R, a detection circuit formed during the entire monitoring process.
  • the input terminal of a level detection circuit 106 is connected to the node 108, and the capacity of the capacitor C, and the voltage I ⁇ R, and The threshold value of the level amplitude detection circuit 106 and the output waveform and frequency of the electronic oscillator 101 can be obtained on the output terminal 109 of the level amplitude detection circuit 106.
  • the monitored flame burns, the flame is extinguished, and the flame / air gap 104 is Electrical conductors other than the flame are shorted to a total of three different levels of logic signals.
  • the flame ion probe 103 is connected in series in a parallel circuit composed of C t and R, and the DC power source has only one E, but despite this, its working principle is: using an electronic oscillator 101 as a signal
  • the main technical characteristics of the source and a level detection circuit 106 for sampling the working conditions of the parallel circuit are exactly the same as the description of the flame sensor principle 1 shown in FIG. 1. The difference is that the second branch of the detection circuit 112 is eliminated, and the flame ion probe 103 is connected in series in the detection circuit 112 '.
  • the reverse current 1 3 is 108-105-104-103-102-101-G, and the potential of the node 108 follows the output terminal 102
  • the amplitude of the signal changes synchronously, so that a logic signal with an alternate output level of 1/0 is obtained on the output terminal 109.
  • Fig. 6 shows an embodiment of a flame sensor electronic oscillator.
  • the power supply of an operational amplifier 1IC is connected to + V D. / — Above V DD or + V DD / G, the resistors 5R, 3R, 4R and capacitor 1C form the feedback network of the operational amplifier.
  • the connection method is shown in FIG. 6, which is a well-known standard multi-resonance oscillator.
  • the output end of the amplifier and the operational amplifier are connected to the output terminal 102.
  • the present invention has no strict technical limitation on the duty cycle of the multivibrator.
  • Fig. 7 shows an embodiment of an electronic switch or voltage comparator of a flame sensor.
  • Fig. 7a shows a first embodiment of a transistor.
  • the resistor R 3 is connected to the node 107, the other end is connected to the base of the transistor 1 ⁇ , the emitter of T, is connected to the output terminal 102, and the collector resistance R 5 is connected to + or 6 points, the collector
  • the output terminal 111 is connected to the input terminal of the CMOS inverter 114.
  • the output terminal of the latter is 115.
  • the negative electrode (V ss ) of the inverter 114 is connected to a V ,
  • the positive electrode is connected to + V DD .
  • Fig. 7b shows an embodiment 2 of an NMOS transmission gate.
  • the substrate of NM0S is connected to terminal 102 via a non-return diode D, the D pole is connected to point G, the G pole is connected to node 107, and the S pole is connected to terminal 111.
  • the transmission gate is turned on to output 1 level (G level). After the inverter 1 to 14 level conversion, the output can be obtained at terminal 115 as 1/0 alternately. Level logic signal.
  • Fig. 7c shows a third embodiment of an operational amplifier.
  • the non-inverting input terminal of an operational amplifier is connected to the node 107, and the resistors 1R and 2R are connected in series across a V. . With + V D.
  • the inverting input terminal of the op amp is connected to the common contact point of the resistors 1R and 2R, and the resistance ratio of 1 R and 2R is set so that the inverting terminal of the op amp obtains a slightly higher than one V.
  • the threshold voltage of the D level when a "short circuit" accident occurs in the flame / air gap 104, a logic signal with a 1/0 level alternate output can be obtained on the terminals 1-15.
  • Fig. 8 shows a first embodiment of a safety protection device for a burner using the flame sensor of the present invention.
  • the flame sensor 01 is one or more of the flame sensors according to claim 1, and the electronic oscillator 101 thereof uses two cascaded CMOS inverters Id, IC 2 , a resistor R s and an inverter. 1 (; 2 input terminals are connected, electric it is connected to the output terminal of the inverter Id and the input terminal of the inverter ICa, one end of the capacitor C is connected to the output terminal of the inverter IC 2 and the output terminal 102, Components! ⁇ And ⁇ are connected to the same point with the other end of C, thereby forming a low-power low-frequency multivibrator.
  • each burner gas control valve is equipped with a bipolar interlock switch I / LL.
  • One of the pole switches I is opened when the gas control position is opened and closed when the valve position is closed.
  • One end of I is connected to the flame ion probe 103, and the other end is connected to point G.
  • the other pole switch of the bipolar interlock switch is disconnected when the gas control valve is closed, and is connected when the valve is opened.
  • One or more switches I connected in parallel are connected in series to DC
  • one or more diodes ⁇ whose cathodes are respectively connected to the nodes 108 of the detection circuit 112 of the flame sensor (01), and their anodes are connected in parallel with a movable button
  • the LAC is connected, and the other end of the LAC is connected to + V render. They are connected to form an accident simulation test circuit 08.
  • the level detection circuit 106 'of the flame sensor is composed of two cascaded CMOS inverters and 15 to form a same phase devices, IC, an output terminal 109 of the anode of the diode D 3 is connected, in parallel to the diode D 3 is connected to the cathode of the node 109 ', the resistor R 2, a diode D ,, capacitor and a resistor ( ⁇ parallel circuit, flame
  • the ion probe 103, the flame / air gap 104, the casing of the burner head or the casing gasket or the nozzle flame baffle constitute a detection circuit 112 of the flame sensor shown in FIG. 1, and its detailed structure and description refer to FIG. 1 and FIG.
  • the electronic switch or voltage comparator 110 includes one or more two poles.
  • Anode 107 are connected to the flame sensor node detection circuit 112, the series circuit is electrically connected in parallel with their cathodes electrically P and R 3 and composed of a composition or a positive gate circuit, and the electrical resistors R 3 P
  • the common connection point of the device is connected to the base of the transistor L, the emitter and the other end of the device are connected in parallel with the node 102, the collector resistance R ⁇ + V DD is connected, and the collector output terminal 11 1 Connected to the input terminal of the CMOS inverter IC S , the output terminal 115 of the inverter IC is connected to the anode of an independent diode 03 , and the cathode of the diode D 3 is connected to the node 109 '.
  • One end of the resistor Rn is connected in parallel to the node 109 ′ with the cathode of the diode D 3 , and the other end of Ru is connected to the parallel circuit composed of the capacitor Cu and the resistor Rn and a one-value resistor Rn to the node a, R.
  • the other end of 13 is connected to the input of the CMOS inverter IC 8 at node b, and the other end of the parallel circuit of Cn and Ru is connected to point G, thereby forming a micro-power delay control with a delay of several seconds.
  • One end of the capacitor C l2 is connected to the output terminal of the inverter at the node C, and the other end thereof is connected to the resistor RH and the CMOS inverter IC, and the input terminal is connected to the node d, and the other end of the RH is connected to + V DD is connected by this group
  • a monostable pulse trigger circuit 03 with a pulse width of tens of milliseconds is formed.
  • Resistor R and an inverter IC, and the output terminal T u a Darlington transistor connected to the base of the junction point e, the emitter of the other end of the point G and K ⁇ R Darlington connected
  • the collector of the triode T, and the valve closing line DZF of the solenoid valve 05 are connected to the node f, and the freewheeling diode D pursueis connected in parallel with the DZF at + V DI and the node f, thereby forming
  • a pulsating power drive circuit 04 constitutes a basic burner safety protection control unit circuit 001.
  • the anode of the diode D 2l is an S terminal, which is connected to the output node e of the inverter IC, and the cathode of the diode D 2 , and the resistor R 3 . Phase connection, the other end of resistor 1 and CMOS XOR gate IC.
  • the output terminal and the resistor R l8 are connected to the node h, the XOR gate IC.
  • a switch button LAX and a capacitor C 2 connected in parallel are connected to + V. The other end of them is connected to the R terminal of the two anodes of the diode D 22 in parallel, thereby forming a circuit consisting of Positive pulse start bistable trigger circuit 06.
  • the resistor R, 8 is connected to the node h, and the other end thereof is connected to the resistor R , ; and the base of the transistor T 12 is connected to the node g, and the emitter of the transistor T 12 is connected to the other end of the resistor Rn.
  • the collector load of the transistor T 12 includes a conventional accident sound and light alarm circuit 010 composed of a light emitting diode and a sounder. For the sake of redundancy, this embodiment will omit this well-known technology.
  • a photocoupler 011 drives the light-emitting diode D, 5 through a current-limiting resistor R, and is connected to the collector of the accident sound and light alarm circuit 010 and the collector of the transistor T 12 at the node j.
  • the burner fire head 105 When the burner fire head 105 is monitored, When the flame is extinguished or the flame / air gap 104 is "short-circuited" by a conductor other than the flame, the light-controlled thyristor CT of the photocoupler 011 is triggered by the conduction state of the triode 1 ⁇ , and has contact with the AC power grid.
  • the bidirectional thyristor CT connected in parallel with the switch K also triggers conduction and starts an exhaust fan or a range hood, thereby forming an accident execution circuit 002.
  • the solenoid valve is a solenoid valve 05 installed on the inlet side of the burner burner. It is provided with a connecting rod 202 sealed to the valve cavity. The solenoid valve handle and the connecting rod are pressed inward and impact the valve rod. The solenoid valve is in a magnetically held normally open position with no power consumption. A valve closing line DZF and a magnetically held electromagnet 200 are sealed in the valve body and automatically shut off the pipeline gas source under the accident pulse drive with a pulse width of no more than tens of milliseconds. .
  • Integrated circuits IC ,, IC ;, 1 (: 5 share a CD4069 six-inverter chip; integrated circuits 2 IC 2 IC 3 ⁇ 4 , IC 8 , IC, use another CD4069 chip; integrated circuit Id—IC 3 power source is + V ..., V ss is connected to a V. u ; the power supply of the remaining integrated circuits is + V DD , and V ss is connected to the G point.
  • the traditional gas appliance control valve In the normal use process, as long as the handle of the solenoid valve 05 is manually pressed to keep the solenoid valve in the open position without power consumption for a long time, the traditional gas appliance control valve is rotated or pressed, and then the gas (or fuel) enters The burner ignites the flame through a traditional electronic ignition or piezoelectric ignition device, and the burner burns normally. At the same time, a group of unipolar dynamic sub-switches IX interlocked with the burner control valve is turned off, and the other pole-operated interlocking switch LK 2 is turned on 5. The main circuit and the electronic oscillator 101 start and vibrate by themselves. The square wave signal is output to the detection circuit 112.
  • the burning flame connects the second branch of the detection circuit, and the node 107 is clamped to a level 0 near the G point, the node 108 and the node Points 109 and 1 09 'are both at the 0 level.
  • the appliance has a burner control valve in a valve open position corresponding to the ignition system of the flame is extinguished or not during ignition pilot flame, the potential of the node 108 rises to a level immediately, with the phase IC "IC 5 with The terminal 1 09 'outputs 1 level, the integration circuit Ru, Cu starts to delay, and the node a reaches the threshold voltage of the inverter IC 8 within a predetermined number of seconds (generally set to 4-7 seconds).
  • the inverter IC 8 flips, and the node C reaches the 0 level instantaneously. Because the potential of the two sides of the electrode plate of the capacitor Cu cannot be changed suddenly, the node d outputs a 0-level monostable trigger signal with a pulse width of tens of milliseconds to trigger the inversion.
  • the phaser IC flips and pushes the transistor T ⁇ to open, the closing coil DZF of the solenoid valve 05 is reversely excited, and the magnetic holding solenoid valve automatically cuts off the gas or liquid source of the burner.
  • the bi-stable trigger circuit 06 The S terminal is activated by a 1-level trigger pulse to enable the XOR gate IC.
  • the triode T l2 is flipped and triggered to open, and the accidental sound and light alarm circuit composed of the conventional method 0 1 0 is turned on and the sound and light alarm signal is issued.
  • Primary side of coupler When opened, the light emitting diode D 15 is turned on, a light control thyristor AC CL CT Triac trigger conduction, mounted
  • the safety device of the burning appliance After two years of practice, it is very necessary to set an action delay of 4-7 seconds in the safety device of the burning appliance, which avoids filling the gas pipe of the burning appliance with air, the ignition failure, and the flame temporarily drifting away from the Transient processes such as the gap 104 cause the safety protection device to malfunction.
  • the user may manually press the button LAC of the accident simulation test circuit 08 during the normal combustion process of the gas appliance after a period of time, for example, within 3 months. Set the time delay in a few seconds, the safety device of the burning appliance will automatically close the solenoid valve and cut off the gas or fuel liquid source and the burning flame, and send the corresponding sound and light alarm signal to achieve the purpose of periodic detection reliability.
  • the above-mentioned reverse current detection circuit generating the second branch 13 of the triac 1 ⁇ IC 3 and the inverter is turned on, inverted output node 115 1/0 alternating "short The "1 level part of the logic signal of the accident" will be introduced into the node 109 'via the positive OR gate D.
  • the above-mentioned control unit circuit 001 and accident execution unit circuit 002 will start work on time.
  • the specific protection process is the same as the aforementioned "fireout” accident. The process is exactly the same. At this time, since the 1/0 alternating pulse is output, the integration delay of the delay control circuit 02 will be increased more than the protection delay of the "flaming accident".
  • this embodiment mainly provides two basic protections of accident “flaming out” and accident “short-circuiting”, but as long as the output signals of other sensors, such as earthquake, fuel or gas pressure overpressure, and smoke, are adjusted to 1 electrical
  • the flat signal (the present invention is designed according to positive logic) and connected to the node 109 'or the node e, can simply and effectively expand the protection function of the safety protection device of the burner of the present invention.
  • Fig. 9 shows a second embodiment of a safety device for a gas appliance having a monitored burner head 105. It has a flame sensor 01 as defined in claim 13.
  • two cascaded CMOS inverters and a feedback network are also used to form a self-excited electronic oscillator 101.
  • the flame sensor 01 and the electronic For component numbers, circuit structures, and operating principles of the oscillator 101, reference may be made to the description of FIG. 5 and FIG. 1, and this embodiment will not be repeated.
  • the burner gas control interlock switch LK in this embodiment is only a set of single-pole switch-on and switch-on, which is turned on when the valve is in the open position, and is turned off when the valve is in the closed position.
  • the accident simulation test circuit 08 is composed of a low-value resistor R c of several thousands of ohms and a moving button LAC in series and is connected in parallel with the node 108 and the point G.
  • the level detection circuit 106 that is, the output of the CMOS inverter IC 4 immediately outputs a 1-level accident logic signal
  • the control unit circuit 8001 and the accident execution unit Circuit 8002 will start working on time.
  • the configuration of the control unit circuit 8001 and the working principle of the accident "flaming out” and the accident “short-circuiting reference may be made to related descriptions such as FIG. 5 and FIG.
  • the level detection circuit 1 06 (1 06 ') and the electronic switch or voltage comparator 1 1 0 (1 10 ') The logic level signals output under the three different working conditions of the flame sensor are briefly described in the special list: terminal 1 09 output level terminal 1 15 output level flame sensor flame / air gap 104
  • FIG. 10 is a schematic structural diagram of an embodiment of a solenoid valve used in conjunction with the safety protection device of the burning appliance.
  • the entire valve body is fixedly mounted on the internal space structure of the appliance. (This figure is omitted for the part related to the gas appliance.)
  • the solenoid valve described in this embodiment is a two-position two-way cut-off type magnetic holding solenoid valve.
  • the shaft of the valve is provided with a cavity, one side of which is in communication with the air inlet 216, and the middle of the cavity is provided with a control port 217, which is in communication with the air outlet 218 on the other side of the cavity.
  • a magnetically held solenoid 200 of a solenoid valve is hermetically mounted on the lower end valve seat 205 of the cavity.
  • valve stem 10 It has an axially moving valve stem 10, a piece that is installed and positioned by accessories such as springs 9 and pallets.
  • the valve plug 11 is installed at the other end of the valve stem 10, and at the upper end formed by the cavity and the control port, the same axis as the valve stem 10 is provided with a through hole 243 on the top of the valve body 204, a shaft
  • the connecting rod 202 moving in the through direction passes through the through hole 243, and their cross-sectional areas should match each other, and the cavity and the external space of the valve body should be maintained at a certain air pressure through one or more fixed sealing devices 233 installed on the inner wall of the through hole. Density.
  • a flap 203 is rigidly connected to the valve stem.
  • a spring 231 is provided between the flap and the control port.
  • the connecting rod 202 moves outward and is limited by the flap and the inner plane of the upper end of the cavity. Bit.
  • a handle 201 is installed at one end of the connecting rod extending from the valve body, and a hole 637 of the operation panel 602 of the gas appliance emerges—a sufficient operating height ⁇ .
  • the other end of the connecting rod 202 is connected with the sheet valve plug 11 and the valve stem 10 An appropriate axial clearance ⁇ 'is left.
  • the sheet-shaped plug 11 closes the control port 217 under the tension of the spring 9, and at this time, the air inlet and the air outlet of the solenoid valve are tightly cut off.
  • FIG. 11 shows an embodiment of a magnetic holding electromagnet of the magnetic holding solenoid valve. It is a new invention formed by further improvement based on the authorized patent CN89105949.0 obtained by the inventor. It can be seen from FIG. 10 that FIG. 11 shows only the core part of the solenoid valve for the safety protection device of the appliance: that is, one of the magnetic holding electromagnet 200 and the valve stem 10, the sheet-shaped plug 11, the return spring 9, etc. are cut off Sectional sectional view of a magnetically held solenoid valve. As a complete safety protection valve, FIG. 11 has omitted the conventional valve body, seat, connecting rod, connecting rod sealing device and operating handle.
  • the upper yoke 1, the permanent magnet 3, the side yoke 4, the lower yoke 5, the rail bearing 51, the fixed magnetic core 2, and the moving iron core 8 constitute a polarization magnetic circuit of the magnetic holding electromagnet 200; and the side yoke 4,
  • the lower yoke 5, the rail bearing 51, the moving iron core 8, the auxiliary magnetic core 2, the electromagnetic coil 6 and the through-core insulating sleeve 21 form the electromagnetic magnetic circuit of the magnetic holding electromagnet 200.
  • Said The side yoke 4 is a circular cylindrical magnet.
  • the bottom of the circular cylinder has a smooth outer pole surface 23.
  • the bottom of the circular cylinder is provided with a shaft hole 32.
  • the diameter of the hole is slightly larger than the diameter of the auxiliary magnetic core 2. some.
  • the top of the open part of the garden is provided with an inner stop 61 and a smooth inner face 62 of the stop.
  • the axial height of the stop exceeds the thickness of the lower yoke 5 by about 1 to 2 mm.
  • a bobbin holder 7 is axially installed in the garden, and the electromagnetic coil 6 is a flat-wound reverse excitation coil.
  • the end of the coil bobbin 7 is a through-core magnetically insulating sleeve 21 (of course, it can also be made as a separate part), which is sleeved on the auxiliary magnetic core 2 and passes through the shaft hole 32.
  • the permanent magnets 3 polarized in the thickness direction are installed in parallel between the outer yoke surface 23 of the side yoke and the upper yoke 1. From the above, it can be seen that 7 zirconium iron 3 is not formed due to the existence of the through-core insulating sleeve 21. Magnetic short circuit.
  • the moving iron core 8 is a smooth circular cylinder, and its pole surface and the pole surface of the auxiliary magnetic core 2 constitute the working pole surface 80 of the electromagnet.
  • the moving iron core 8 presents two cylindrical surfaces of different diameters in the axial height, wherein the cylindrical surface near the fixed magnetic core 2 side has the main axial height and a slightly larger diameter; two cylindrical surfaces of different diameters intersect A limiting surface 81 for controlling the working stroke of the moving iron core 8 to not exceed a value of ⁇ is formed everywhere.
  • the lower yoke 5 is a circular-shaped integral orifice plate, and a guide bearing 5 1 is provided at its axial center portion. It has a smooth inner surface and forms a good sliding fit with the moving iron core 8.
  • the overall shape of the circular overall orifice plate namely the lower yoke 5
  • the optimal interference amount is not less than 0.02 mm.
  • the annular flange 63 of the inner stop is still about 1 to 2 mm higher than the outer edge surface of the lower yoke 5, for positioning purposes, the annular flange 63 is also provided with a uniform, At more than two inversion riveting points 64.
  • the present invention provides that the coil bobbin 7 and the moving iron core 8 as well as the coil bobbin 7 and the electromagnetic coil 6 and the closed side magnet
  • the inner wall space of the yoke 4 must have sufficient air gap 33 reserved.
  • a valve stem 10 is rigidly connected to the moving iron core 8.
  • the return spring 9 is sleeved outside the valve stem and the rail bearing 51.
  • the rod 11 is provided with a necessary annular groove, and a return spring positioning flange 35 and a rigid bracket are respectively installed.
  • the auxiliary magnetic core 2 and the upper yoke 1 may be a complete magnetic conductor, or may be welded into a whole after being manufactured separately.
  • the auxiliary magnetic core 2 there is also a convex cylindrical cylinder body 38, which relies on expansion riveting or screw connection, and the assembled magnetic holding electromagnet 200 and hollow nut are integrated through the cylindrical cylinder 38. 1 5 Connected into one.
  • the present invention also provides an outer end portion of the sliding gap.
  • FIG. 12 shows various embodiments in which a sealing ring or a sealing packing is provided between the magnetic holding solenoid valve moving core and the rail bearing 'sliding surface.
  • the sealing device according to the present invention has lower requirements than the sealing device described in general mechanical engineering. Its main purpose is to prevent the Solid-shaped impurities such as tar, water droplets, and iron salt-based scales penetrate the inside of the electromagnet from the sliding gap, so that the pole faces of the electromagnet cannot fit well.
  • Figure 12 shows the structure of node A in Figure 11: a horizontal annular groove is provided at the end of the guide bearing 51, and a sealing ring 53 made of solid material is even filled with a certain solid lubricating material 54 After the movable iron core 8 is pushed in, the seal ⁇ 53 is slightly compressed and deformed to seal the sliding fitting gap 52 tightly.
  • the annular groove is provided on the surface of the movable iron core 8, and for the convenience of assembly, all the sealing devices in Fig. 12 are provided with an assembly gap 55 for convenient installation. 12b], FIG. 12D], FIG. 12F], and FIG.
  • a seal ring or a solid sealing filler 5 3 is provided on the top of the guide bearing 51, and it is sealed It is fixed in the stuffing box housing 57.
  • the element 57 may be fixed in the outer convex groove 56 of the guide bearing, as shown in FIG. 12 b). It can also be fastened to the upper yoke 5 with screws 58, as shown in Fig. 12D). It can also be fixed by using the return spring 9 and the positioning flange 59, as shown in FIG. 12F).
  • the filler 53 can also be squeezed with the conventional fastening thread 60 to seal the sliding fit gap, as shown in FIG. FIG.
  • FIG. 13 shows an embodiment of an interlocking joint of a gas control valve of a gas appliance.
  • a touch button 626 is installed in the inner space of the operation panel 602 above the control valve 617.
  • a hole 628 is provided in the operation panel, and a push rod 627 of the touch button passes through this hole and protrudes.
  • the panel has a free height, and a control valve operation handle 620 is set on the valve stem 629.
  • the control valve operation handle has a circular table top 621. Its outer edge is similar to the traditional structure and is a smooth plane.
  • the inner edge of the circular table top is composed of a plane 623 and a convex arc-shaped bead plane 625 to form a complete 360 ° arc-shaped plane.
  • the arc-shaped bead plane 622 occupies a center angle ct, and is also provided between two planes of different heights. A smooth transition surface 624.
  • the center angle cc determines its proper radian according to the following principles: Rotate the control valve operation handle 620—until the air passage of the valve body just begins to bleed, and at this time, the curved bead plane 622 just presses the ejector rod 627 to move inward to make the Touching the button 626 switches the action.
  • the touch button 626 when the touch button 626 is a pair of movable contact, it has the necessary technical characteristics of the gas control switch LK of the present invention, that is, when the control valve is closed, A pair of moving and opening contacts LK, which are disconnected in the valve opening position; on the other hand, when the touch button 626 is a pair of moving and closing contacts, it has the technical features described in FIG. 8 and FIG. 9 of the present invention and becomes the described Interlock switch LL or LK.
  • the implementation of the safety protection device for a gas appliance according to the present invention may adopt various different implementation schemes. For example, the DC power supply, the flame sensor, the control unit circuit, etc.
  • the electric circuit and the magnetic holding solenoid valve are all installed in the structural space of a gas appliance.
  • a solenoid valve is installed on the intake pipe of the burning appliance, and the test button LAC and the cancel button LAX and the gas control valve interlock switch IX I LL or LK are installed on the operation panel of the burning appliance.
  • all the circuit components and the direct current power supply (dry battery) are installed in a separate closed case inside the burner housing, the housing and the burner are installed and positioned, and a free-opening and closing cover is provided, and it has high temperature resistance Flame retardant properties.
  • the flame ion probe is installed in the burner or in the outer space of the burner to sample the flame. It can be seen that this is a product implementation scheme integrated with the burning appliance.
  • the magnetic holding solenoid valve can also be installed on a gas source intake branch pipe other than a gas appliance, and the remaining DC power supply, flame sensor, various circuits, buttons and other components are still installed in the structure space of the gas appliance.
  • a separate closed housing inside, the housing and the gas appliance are installed and positioned, and a free-opening and closing cover is provided, which has high temperature resistance and flame retardant characteristics, and an insulated wire is used between the solenoid valve and the closed housing.
  • they can be made into one or more tangible products according to the technical characteristics specified in the present invention. Since this is a very simple and well-known technology, the present invention is no longer expressed in the drawings.
  • the power consumption of a four-burner burner during normal combustion is about 3V / 1. 5 ⁇ ⁇ or 4.5 V / 3 ⁇ ⁇ , which is about 4000 times less than the power consumption of traditional AC inductive flame sensors. .
  • the present invention can be implemented without changing the basic structure of the existing gas appliance complete product.
  • a method for preparing a flame sensor which uses one or more traditional flame ion probes to sample the flames of one or more monitored burner fire heads, and is characterized by:
  • At least one side of the nozzle flame of the ion probe has a shell or a shell gasket or a nozzle flame baffle made of a high temperature resistant conductive material and is connected to the G point;
  • a detection circuit 112 is provided for each burner head 105, wherein a resistor R 2 and an anode of a diode D, are connected to a node 107, a cathode of the latter is connected to a resistor R, and a capacitor The parallel circuit of C, is connected to the node 108, said!
  • a self-excited electronic oscillator 101 without a transformer continuously outputs a square wave or a sine wave or a triangular wave or Any waveform signal such as a niobium tooth wave, step wave, or sequential pulse wave, as long as its upper swing level 1 is equal to or slightly less than the positive voltage value + V DD of the DC power supply E, and its lower swing amplitude is 0.
  • the level is equal to or slightly higher than the negative voltage value of the DC power supply-V DD;
  • the level detection circuit 106 is an electronic switch having a threshold value, and when the electronic switch is an inverter, it can be output at its terminal.
  • 109 Obtain the logic signal of monitored flame burning output as 0 level and flame extinguishing as 1 level.
  • the electronic switch 110 is an inverter or a buckle or the voltage comparator 110 is an operational amplifier and can be obtained on its output terminal 111 When the flame / 'air gap HW is short-circuited by a conductor other than the flame, the logic signal is output at an alternating level of 1/0.
  • the output terminal 109 of the level-amplifier circuit 106' ' You can get a logic signal with output level 0 or 1 on the output terminal:
  • the output terminal 109' can be obtained on the output terminal 109
  • () level logic signal & set a common electronic switch or voltage comparator 110 ' which is a positive NOR circuit with n-line input terminal, any one or more of the flame /
  • the air gap 104 is shorted by a conductor other than the flame, and the logic output of 1/0 level 3 ⁇ 4 can be obtained on the output terminal 115 of the inverter 114 connected to the voltage comparator 110 ′.
  • a method for preparing a flame sensor wherein one or more traditional flame ion probes are used to sample the flames of one or more monitored burner fire heads, which are characterized by:
  • a. Set two DC power sources E and E 2 connected in series, where the negative pole is connected to the positive pole of E 2 to form the reference ground point G; b.
  • One or more of the burner fire head 105 is close to the flame At least one side of the nozzle flame of the ion probe has a shell made of a high-temperature resistant conductive material or a shell gasket nozzle flame baffle and is connected to the G point;
  • a detection circuit 112 is provided for each burner head 105, wherein a resistor R 2 is connected to the anode of a diode at a node 107, and a capacitor C is connected across the cathode of the diode D, and Between point G, element D, — * :, that is, the first branch of the detection circuit, a flame ion probe 103 is connected to node 107, and an end of the flame near the nozzle is connected to the burner.
  • the casing or casing liner or nozzle flame baffle of the fire head 105 has a flame / space air gap 104 of an appropriate width, and the components R 2 — 103 — 104 — 105 constitute the second branch of the detection circuit;
  • a self-excited electronic oscillator 101 without a transformer continuously outputs a square wave or a sine wave to the detection circuit ⁇ 2 through its output terminal 102 and the resistor R 2 connected thereto.
  • Any one of the waveform signals such as triangular wave, sawtooth wave, step wave, or sequence pulse wave, as long as the swing amplitude 1 level is equal to or slightly less than the positive voltage value + V DD of the DC power supply E, and the swing The amplitude 0 level is equal to or slightly higher than the negative voltage value of the DC power source E 2 -V DD ;
  • a level detection circuit 106 is provided, the input end of which is connected to the node 108, and the capacity of the capacitor C, the threshold value of the level detection circuit 106, and the electronic oscillator 101 are selected. Output the waveform and frequency, and make the resistance of the resistor R 2 greater than 1 ⁇ 5M ⁇ , so that the resistance of the resistor is larger than the resistance of 11 2 , so that the output terminal of the level detection circuit 106 can be On 109, two different logic signals are obtained for the monitored flame burning and flame extinguishing;
  • the level detection circuit 106 is an electronic switch having a threshold value, and the electronic switch can be obtained on its output terminal 109 when the electronic switch is a phase inverter.
  • the logic signal of the flame output being monitored is 0 level and the flame extinguishing is 1 level.
  • n independent said sensor detection circuits 112 should be set and match a common said level Amplitude-amplifier circuit 106 ′, which has a positive-or gate or positive-or-negative circuit with n-wire input terminals, can be obtained at the output terminal 109 ′ of the level-amplifier circuit 106 1 when all burner heads 105 burn normally.
  • the output is a logic signal of 0 level or 1 level; when any one or more of the burner fire head 105 flame is extinguished, the output terminal 109 'can be obtained with an output of 1 level or 0 level.
  • a common electronic switch or voltage comparator 110 ′ is provided, which is a positive or NOR circuit with an n-line input terminal.
  • the short-circuited electrical conductor can obtain a logic signal with an alternating level of 1/0 on the output terminal 115 of the inverter 114 connected to the voltage comparator 110 ′.
  • a method for preparing a flame sensor wherein one or more traditional flame ion probes are used to sample the flames of one or more monitored burner fire heads.
  • the characteristics are:
  • One or more of the burner fire heads 105 have a casing or a casing gasket or a nozzle flame baffle made of a high temperature resistant conductive material on at least one side of the nozzle flame of the flame ion probe, and is connected to point G. Phase connection:
  • a detection circuit 112 is provided for each burner head 105, wherein a resistor is connected to the anode of the diode D, at the node 107, and a resistor is connected across the cathode of the diode and the point G
  • the element I ⁇ —D, —R that is, constitutes the first branch of the detection circuit.
  • a flame ion probe 103 is connected to the node 107, and an end of the flame near the nozzle is connected to the burner head.
  • the casing or casing gasket or spout flame baffle of 105 has a flame / space air gap 104 of an appropriate width, and the components R 2 — 103 — 104 — 105 constitute the second branch of the detection circuit;
  • a level detection circuit 106 is provided, the input end of which is connected to the node 108, and the resistance value of the resistor R, the threshold value of the level detection circuit 106 and the electronic oscillator 101 are selected and adjusted. Output the waveform and frequency, and make the resistance value of the resistor R 2 greater than 1 ⁇ M ⁇ , make the resistance value of the resistor R sufficiently large, so that the output terminal of the level detection circuit 106 can be On 109, two different logic signals are obtained for the monitored flame burning and flame extinguishing;
  • a current of 1 3 can be obtained at the output terminal of the electronic switch or voltage comparator 110 or at the output terminal 115 of the inverter 114 connected thereto.
  • the flame / air gap 104 is shorted by a conductor other than a flame. There are two different logic signals connected and open.
  • the level detection circuit 106 is an electronic switch having a threshold value, and when the electronic switch is an inverter, it can be connected to its output terminal 109 Obtain the logic signal that the monitored flame's combustion output is 0 level and the flame extinguishment is 1 level.
  • n independent said sensor detection circuits 112 should be set and match a common said level Amplitude-amplifier circuit 106 ', which has a positive-or gate or positive-or-negative circuit with n-wire input terminals, and can be obtained at the output terminal 109' of the level-amplifier circuit 106 'when all burner heads 105 are normally burned.
  • the output is a logic signal of 0 level or 1 level; when any one or more of the burner fire head 105 flame is extinguished, an output of 1 level or 0 3 ⁇ 4 level logic can be obtained on the output terminal 109 ′.
  • a common electronic switch or voltage comparator 110 ′ is provided, which is a positive or NOR circuit with an n-line input terminal. When any one or more of the flame / air gaps 104 monitored by the flame are outside the flame When the conductive body of the short circuit is short-circuited, a logic signal with an output level of 1/0 can be obtained on the output terminal 115 of the inverter 114 connected to the voltage comparator 110 ′.
  • a method for preparing a flame sensor wherein a traditional flame ion probe 103 samples the flame of a monitored burner fire head 105, and is characterized by:
  • One of the burner fire heads 105 has a housing or a housing gasket or a nozzle flame baffle made of a high temperature resistant conductive material on at least one side of the nozzle flame of the flame ion probe, and a capacitor C
  • a parallel circuit with a resistor R, is connected to the node 108, and the other end of the parallel circuit is connected to the G point;
  • Substitute 26 c, a flame ion probe 103, the end of the flame near the nozzle with the burner fire head 105 or the casing or the gasket or the nozzle flame baffle has an appropriate width of the flame / air gap 104, element 103- 104 — 105 — d II R, that is, the detection circuit 1 ⁇ ′ constituting the flame sensor, wherein the optimal value of the resistor is not less than 1 ⁇ 5M ⁇ ;
  • a self-excited electronic oscillator 101 without a transformer is connected to the flame ion probe 103 through its output terminal 102 and continuously outputs a square wave or a sine wave to the detection circuit 112 'during the entire monitoring process
  • the 0 level is equal to or slightly positive to the DC power source E, and the negative pole is the level value of the reference ground point G.
  • a level detection circuit 106 is provided, the input end of which is connected to the node 108, and the capacitor C is selected, And the size of the resistor R, the threshold value of the level detector circuit, and the output waveform and frequency of the electronic oscillator 101 can be obtained at the output terminal 109 of the level detector 106.
  • Monitoring the flame burning, flame extinguishing, the flame / air gap 104 is shorted by a conductor other than the flame, and there are three different logic signals.
  • the level detection circuit 106 is an electronic switch or voltage comparator having a threshold value, and when the electronic switch is an inverter or an inverting input terminal When the voltage comparator is used, the output of the monitored flame can be obtained on its output terminal 109 as 0 level, the flame extinguished as 1 level, and the flame / air gap 104 is shorted by a conductor other than the flame to 1/0. Three logic signals of alternating levels.
  • a safety protection device for a burning appliance including a flame sensor, a gas-controlled wide interlock switch for a monitored burner, a delay control circuit, a monostable pulse trigger circuit, a power drive circuit, a solenoid valve, a bistable trigger circuit, and a photoelectric sensor Coupler, electronic switch and DC power supply, which are characterized by:
  • the flame sensor 01 is predetermined according to one of claims 1 to 9 or more of the flame sensor
  • the electronic oscillator 101 uses two cascaded CMOS inverters IC ,, IC 2, - resistors
  • the inverter R s is connected to the input terminal of the CMOS inverter 1 :, a resistor is connected to the output terminal of the IC, and the input terminal of the IC 2 , and one end of the capacitor (: is connected to the IC
  • the output end of 2 is connected to the output terminal 102, and the other ends of the resistor R s , the resistor R t , and the capacitor C are connected at the same point, thereby forming a low-power multivibrator with low power consumption: one or more
  • the burner fire head 105 of the shell or the shell gasket or the nozzle flame baffle is connected to the reference point G, and each burner gas control valve is provided with a bipolar interlock switch LK, / LK 2 , where a one-pole switch
  • the + V DD phase is connected and constitutes the analog simulation test circuit 08;
  • the power consumption flame sensor detection circuit ⁇ 2; the anode of the electronic switch or voltage comparator 110 ′ 11: 1 or one or more diodes D 2 is connected to the node 107 of the flame sensor detection circuit 112, all The cathode of the diode D 2 is connected in parallel with a series circuit composed of a resistor R 3 and a resistor R 4 .
  • a positive OR circuit the resistor and the connection point of the resistor are connected to the base of the transistor 7, the emitter of the transistor T, and the other end of the resistor R »are connected in parallel with the node 102, and the transistor T , and collector resistors R s + V D D is connected to the transistor T, the collector output terminal of inverter 111 and a CMOS IC 3 is connected to the input terminal, the output terminal of the CMOS inverter IC 1153 and a The anode of the independent diode 0 3 is connected, and the cathode of the diode D 3 is connected to the node 109 ′;
  • One end of the resistor R is connected in parallel with the cathode of the diode D 3 at the node 109 ′, the other end of the resistor R n is connected in parallel with a capacitor C u and a resistor R 12 and a low-value resistor R 13 is connected to node a, the other end of resistor R 13 is connected to a CMOS inverter 1 (: 8 input terminal is connected to node b, and the other end of the parallel circuit of capacitor Cu and resistor R 12 is connected to The G point is connected, thereby forming a micro power consumption delay control circuit 02 with a delay of several seconds ; one end of a capacitor C 12 is connected to the output terminal of the 1 (: 8 at the node C, and the other end thereof
  • the resistor R 14 and the input terminal of a CMOS inverter IC W are connected to the node d, and the other end of the resistor R 14 is connected to + V DD , thereby forming a single unit having a pulse width
  • Stabilizing pulse trigger circuit 03 a resistor R 15 is connected to the output terminal of the CMOS inverter IC 9 and a base of a Darlington tube T facedat the node c, the other end of the resistor R 1S and Darlington The emitter of the tube is connected to point G, and the collector of the Darlington tube is connected to the valve closing coil DZF of the solenoid valve.
  • Point f a freewheeling diode D "and close valve and connected between the coil DZF + V DD to node f, thereby forming a pulsating operation of the power drive circuit 04 and combined into a basic security appliance control unit Circuit 001:
  • the anode of a diode D 21 is an S terminal, which is connected to the output terminal e of the CMOS inverter IC 9 , the cathode of the diode D 21 is connected to a resistor R 3 () , and the other end is XORed with a CMOS
  • the output terminal of the gate IC 1 () and a resistor R 1 S are connected to the node h, and the two input terminals of the CMOS XOR gate IC lfl are respectively connected to the cathodes of two diodes D 22 , one of which is a diode D 22 the cathode further 3 'connected to the cathode of the diode D 2l and a resistor R, a resistor R 3.
  • a moving button LAX is connected in parallel with the capacitor C M and is connected across the R terminal of the parallel anode of the two diodes D 22 and + V DD .
  • the other end of the resistor R 1 S is connected to the base of the resistor R 17 and the transistor T 12 at the node g, and the emitter of the transistor and T, 2 is connected to the other end of the resistor R 17 at point G.
  • the transistor The collector load of T 12 contains the conventional accident sound and light alarm circuit 010 composed of light-emitting diodes and a siren;
  • a photocoupler 011 driving light-emitting diode D 1S is connected to the collector of the accident sound and light alarm circuit 010 and the transistor T 12 through the current limiting resistor R 19 at the junction j.
  • the light-controlled thyristor CT of the photocoupler 011 triggers the bidirectional thyristor CT connected in parallel with the contact switch K of the AC power grid to open and automatically starts the discharge.
  • An air fan or range hood constitutes an accident execution circuit 002; d.
  • the solenoid valve is a magnetic holding solenoid valve 05 installed on the gas inlet pipe of the gas appliance, and it is provided with a link that can move axially
  • the connecting rod passes through the valve body and the required airtightness is maintained between the cavity of the solenoid valve and the external space of the wide body by one or more sealing devices, and the operating handle of the solenoid valve and the connection are pressed.
  • the rod moves inward and hits the valve stem to place the solenoid valve in a magnetically-maintained constant position without power consumption.
  • a valve closing coil DZF of the solenoid valve and a magnetically-maintained electromagnet 200 are sealed in the valve body and are not larger than a few. Automatic shut off air accident driving pulse width in milliseconds.
  • the burner safety protection device characterized in that: when each of the burner gas control valves is in a closed position, a light touch provided inside the burner operation panel The ejector lever of the button extends through the hole to the panel with a free height. When the gas control valve operation handle is rotated, the convex arc-shaped bead presses the ejector rod to smooth the wave surface and the inner edge plane of the bead. The inner side moves to form a bipolar interlock switch LK, / LK 2 which works in interlock with the gas control valve. 17.
  • a safety protection device for burning appliances including a flame sensor, an interlock switch of a monitored burner gas control valve, a delay control circuit, a monostable pulse trigger circuit, a power drive circuit, a solenoid valve, a bistable trigger circuit, and a photoelectric coupling.
  • Device, electronic switch and DC power supply which are characterized by:
  • the flame sensor 801 is one of the flame sensors according to claims 13 to 14, and the electronic oscillator 101 uses two cascaded CMOS inverter ICs, ICz, a resistor R s and one The input terminal of the CMOS inverter IC is connected, a resistor R is connected to the output terminal of the 1 ⁇ :, and the input terminal of the IC 2 , and one terminal of a capacitor C is connected to the output of the IC 2 .
  • the terminal and the output terminal 102 are connected, and the resistor R s , the resistor R, and the capacitor C are connected at the same point, thereby forming a low-power low-frequency multivibrator 101; a CMOS inverter IC 4
  • the level detection circuit 106 of the flame sensor 801, a moving button LAC is connected in series with a resistor R c and then connected to a parallel circuit of a capacitor and a resistor, and the parallel circuit is connected across the circuit.
  • An anode of a diode D 3 is connected to an output terminal 109 of the CMOS inverter IC 4 of the flame sensor 801, and a cathode of the diode D 3 is connected to an end of a resistor Ru at 109 ′, the other end of the resistor R and a capacitor U C u and the parallel circuit of a resistor R 12 and a low value resistor R 13 is connected to the node a, the other end of the resistor R 13 and a CMOS inverter
  • the input terminal of the IC 8 is connected to the node b, and the other end of the parallel circuit of the capacitor C u and the resistor R 12 is connected to the G point, thereby forming a micro power delay control circuit 802 with a delay of several seconds.
  • the solenoid valve is a magnetic holding solenoid valve 805 installed on the gas inlet pipe of the gas appliance. It is provided with a link that can move axially. The link passes through the wide body and consists of one or more than one
  • the sealing device maintains the necessary airtightness between the cavity of the electromagnetic gang and the external space of the valve body. Press the operation handle and the connecting rod of the electromagnetic valve to move inward and tap the valve rod to make the solenoid valve inactive. The consumed magnetic remains in the normally open position.
  • a valve closing coil DZF of the solenoid valve and a magnetic holding electromagnet 200 are sealed in the valve body and automatically shut off the air source under the accident pulse drive with a pulse width of no more than tens of milliseconds.
  • the safety protection device for a burning appliance characterized in that: when each of the burning appliance gas control valves is in a closed position, a light touch provided inside the operating panel of the burning appliance The ejector lever of the button extends through the hole to the panel with a free height.
  • the gas control valve operating handle is rotated, the convex arc-shaped bead presses the ejector rod through the smooth transition surface and the inner edge plane of the bead.
  • the inner side moves to form a single-pole yoke switch LK that is interlocked with the gas control valve.
  • the solenoid valve used in the safety protection device of a gas appliance is characterized by:
  • the side yoke 4 of the magnetic holding electromagnet 200 sealed in the valve body of the gas control valve is a cylindrical magnet.
  • the bottom of the cylinder is provided with a shaft hole 32.
  • An inner stop 61 and a smooth stop inner edge surface 62 are provided at the open top end portion of the side yoke;
  • the lower yoke 5 of the magnetic holding electromagnet is a circular hole plate provided with a central shaft hole, and a convex circular ring guide bearing 51 is also provided on the outside of the shaft hole.
  • the interference fit embeds the lower yoke 5 into the inner edge surface of the stop of the side yoke, and the optimal interference amount is not less than 0.02mm ;
  • the annular flange 63 of the inner stop is also provided with two or more uniformly turned inward riveting points 64 :
  • the outer surface of the moving iron core 8 and the inner surface of the central shaft hole of the guide rail bearing 51 are slidingly fitted with a slight clearance, and an outer end portion of the movable iron core 8 is also embedded in the guide rail bearing or An annular groove on the outer surface of the moving iron core or a sealing ring or a solid sealing filler 53 sealed in a stuffing box housing at the end of the guide bearing ;
  • the moving iron core 8 is also provided with a limit surface for controlling the working stroke of the moving iron core at an end close to the guide rail bearing 51.
  • the upper yoke 1 is a circular yoke with an area equivalent to the projection area of the cylindrical guide magnet, and an auxiliary magnetic core 2 is provided at a central portion thereof.
  • An outwardly convex circular cylinder 38 is provided, and a hollow nut 15 is connected with the circular cylinder 38 as a whole.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)

Abstract

L'invention concerne un procédé de fabrication de quatre détecteurs de flammes et un dispositif de sécurité pour cuisinière à gaz utilisant ces derniers. Le dispositif comprend un capteur de flammes, un multivibrateur auto-induit sans transformateur, au moins un circuit détecteur de flammes pour la réception de signaux vibratoires continus en provenance du multivibrateur, un discriminateur d'amplitude, un interrupteur électronique (ou comparateur), une unité de commande et un circuit de prévention d'accidents. Le dispositif émet trois types de signaux logiques, dont un signal de fonctionnement normal, un signal d'extinction en cas d'accident et un signal de 'contact'. L'invention porte sur un dispositif de sûreté pour cuisinière à gaz présentant une haute fiabilité et un système interrupteur rapide.
PCT/CN1998/000013 1997-01-24 1998-01-22 Procede de fabrication de detecteur de flammes et dispositif de securite pour cuisiniere a gaz utilisant ce dernier WO1998033019A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU57467/98A AU5746798A (en) 1997-01-24 1998-01-22 Fabricating method of flame sensing device and safety apparatus of gas stove using the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN97107344.9 1997-01-24
CN97107344 1997-01-24

Publications (1)

Publication Number Publication Date
WO1998033019A1 true WO1998033019A1 (fr) 1998-07-30

Family

ID=5169478

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN1998/000013 WO1998033019A1 (fr) 1997-01-24 1998-01-22 Procede de fabrication de detecteur de flammes et dispositif de securite pour cuisiniere a gaz utilisant ce dernier

Country Status (2)

Country Link
AU (1) AU5746798A (fr)
WO (1) WO1998033019A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107728607A (zh) * 2017-11-28 2018-02-23 中山华帝电子科技有限公司 一种灶具点火控制板测试装置及测试方法
CN109990316A (zh) * 2017-12-29 2019-07-09 青岛海尔智慧厨房电器有限公司 一种燃气灶具燃烧器及燃气灶具
CN113108323A (zh) * 2021-04-16 2021-07-13 重庆蓝岸通讯技术有限公司 智能燃气灶控制系统及控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2085921U (zh) * 1990-12-05 1991-10-02 张腾广 燃气电子式熄火保护及自动控制装置
CN2106968U (zh) * 1991-01-30 1992-06-10 洛阳市涧西中原矿山机械研究所 火焰电离式燃气器具自动保护装置
CN1110778A (zh) * 1993-12-27 1995-10-25 株式会社金星社 燃气灶的遥控和驱动控制电路

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2085921U (zh) * 1990-12-05 1991-10-02 张腾广 燃气电子式熄火保护及自动控制装置
CN2106968U (zh) * 1991-01-30 1992-06-10 洛阳市涧西中原矿山机械研究所 火焰电离式燃气器具自动保护装置
CN1110778A (zh) * 1993-12-27 1995-10-25 株式会社金星社 燃气灶的遥控和驱动控制电路

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107728607A (zh) * 2017-11-28 2018-02-23 中山华帝电子科技有限公司 一种灶具点火控制板测试装置及测试方法
CN107728607B (zh) * 2017-11-28 2024-04-26 中山华帝电子科技有限公司 一种灶具点火控制板测试装置及测试方法
CN109990316A (zh) * 2017-12-29 2019-07-09 青岛海尔智慧厨房电器有限公司 一种燃气灶具燃烧器及燃气灶具
CN109990316B (zh) * 2017-12-29 2024-04-30 青岛海尔智慧厨房电器有限公司 一种燃气灶具燃烧器及燃气灶具
CN113108323A (zh) * 2021-04-16 2021-07-13 重庆蓝岸通讯技术有限公司 智能燃气灶控制系统及控制方法
CN113108323B (zh) * 2021-04-16 2023-07-21 重庆蓝岸科技股份有限公司 智能燃气灶控制系统及控制方法

Also Published As

Publication number Publication date
AU5746798A (en) 1998-08-18

Similar Documents

Publication Publication Date Title
US5347982A (en) Flame monitor safeguard system
CN208282177U (zh) 一种瞬燃燃气灶点火系统及燃气灶
CN101598354B (zh) 一种燃气灶的点火装置
CN104048328A (zh) 燃气灶即时点火方法和实现该方法的装置
WO1998033019A1 (fr) Procede de fabrication de detecteur de flammes et dispositif de securite pour cuisiniere a gaz utilisant ce dernier
US3938937A (en) Fuel ignition control arrangement
CN201531920U (zh) 一种燃气灶的点火装置
CN1073700C (zh) 火焰传感器及燃具安全保护装置
CN201285083Y (zh) 燃气具点火控制装置
CN203964008U (zh) 脉冲点火器
CN109140534A (zh) 一种燃气灶启动系统
CN102425810B (zh) 一种场效应离子感应灶具脉冲点火系统
CN206094192U (zh) 一种点火装置及应用其的家用燃气灶
US4128387A (en) Ignition device
CN209147160U (zh) 一种燃气灶启动系统
CN110440303A (zh) 一种瞬燃燃气灶点火系统、点火方法及燃气灶
CN208967846U (zh) 燃气设备
CN2916418Y (zh) 一种燃气炉
CN202470136U (zh) 一种燃气灶具的点火和制动装置
CN210861211U (zh) 一种关火电路及应用该电路的电控燃气灶
CN102538030A (zh) 一种燃气灶具的点火和制动装置
JP2006517645A (ja) ガス流れに点火する方法と装置
CN108626755A (zh) 燃气灶防熄火器
CN112443862B (zh) 火焰点燃和检测系统以及包含其的燃气装置
CN202419724U (zh) 一种场效应离子感应灶具脉冲点火器

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CU CZ DE DK EE ES FI GB GE HU IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 1998531456

Format of ref document f/p: F

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA