JPS6215636Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a combustion control device that automatically performs centering in a combustion device such as a kerosene stove.

Recently, some kerosene stoves have a function of automatically raising the wick for a predetermined period of time using a gear motor, and automatically igniting the heater after the elapse of the specified period of time. Some devices with such a function set the time required to raise the wick using a timer circuit that uses the charging and discharging time of a capacitor. At the same time, it is necessary to reset the contents of the timer circuit. This is because if the contents of the timer circuit are not reset at the same time as the fire is extinguished, when the fire is extinguished and immediately re-ignited, it will not be possible to obtain an accurate set time, and there will be an inconvenience that the ignition operation will be performed before the wick has risen to the normal position. This is because it occurs. Therefore, in this type of device, control is required to keep the set time constant.

This idea was made in view of the above points,
Automatically raises the core for a predetermined period of time,
A combustion control device that is equipped with a function of automatically igniting the ignition after the above-mentioned certain period of time has elapsed, and that can always set the time required for the wick to rise, and that enables reliable centering and ignition operations. is intended to provide.

An embodiment of this invention will be described below with reference to the drawings. In the figure, 11 is a plug for insertion into an outlet, 12 is a fuse, and 13 is a protector that cuts off the power supply to the subsequent circuit section when overvoltage is applied. In addition, PSW1 is a power on/off switch that has a normally closed contact NC, a normally open contact NO, and a movable contact S.
The normally closed contact NC and the normally open contact NO are interposed in one main power supply line L, and the movable contact S is a seismic switch that turns off when a vibration above a certain level is detected.
ASW, diode D ₁ , resistor R ₁ , first relay RY
1 to the other main power supply line L'. Note that when the first relay _RY11 is energized, its normally open contact RYS1a is closed and its normally closed contact RYS1b is opened. A diode D ₂ and a capacitor C ₁ are connected in parallel to both ends of the first relay RY1. Also,
A diode is installed between the above main power supply lines L and L'.
D ₃ , resistor R ₂ , second relay RY2, and collector-emitter of transistor Q are interposed in series. When the second relay RY2 is energized, it operates to switch its switching contact RYS2 from the terminal a side to the terminal b side. A diode _D4 is connected to both ends of this second relay RY2. Further, between the main power supply lines L and L', a switching contact RYS2 of the second relay RY2 and a gear motor GM for lifting the core connected to the terminal a of this switching contact RYS2 are interposed, and a switching contact An ignition device IG connected to terminal b of RYS2 is interposed.

Further, l ₁ is a first auxiliary power supply line, l ₂ is a second auxiliary power supply line, and the first auxiliary power supply line l ₁ supplies main power through the resistor R ₃ and the diode D ₃ . The second auxiliary power supply line _l2 is connected to the main power supply line L through a resistor _R4 , the resistor _R2 , and the diode _D3 .

A series circuit consisting of a core lowering solenoid LS and a normally closed contact RYS1b of a relay RY1 is interposed between the first auxiliary power supply line _l1 and the main power supply line L', and a core lowering solenoid LS A digester capacitor _C2 is interposed as a first capacitor for driving. Further, an interlocking switch PSW2 that interlocks with the power on/off changeover switch PSW1 is connected in parallel to the normally closed contact RYS1b. Furthermore, between the second auxiliary power supply line _L2 and the main power supply line L',
Zener diode ZD, comparator IC, resistor
A series circuit of R ₅ and R ₆ , a series circuit of a time-limiting capacitor C ₃ as a second capacitor, and a resistor R ₇ are interposed in parallel. Comparator above
The positive input terminal of the IC is connected to the connection point P ₁ of the above-mentioned resistors R ₅ and R ₆ , and the negative input terminal is connected to the connection point P 1 of the above-mentioned capacitor C ₃ and resistor R _7.
is connected to the connection point _P2 . A capacitor _C4 is connected between the positive and negative input terminals. Further, a discharge diode _D5 constituting a discharge circuit for the time limit capacitor _C3 is connected between the connection point _P2 and the main power supply line L'. In addition, a diode D6 is connected between the positive input terminal and the output terminal of the comparator IC, and a diode _D6 is connected between this output terminal and the second
A resistor _R8 is connected between the auxiliary power supply line _l2 , and the output terminal of the resistor R8 is further connected to the base of the transistor Q via a resistor _R9 . And these comparator ICs, resistors R ₅ to _{R 9} and capacitors
A timer circuit TM is formed by C ₃ , C ₄ , diodes D ₄ , D ₅ , D ₆ , Zener diode ZD, transistor Q, relay RY2, and the like.

Next, the operation of this device configured as described above will be explained. First, normal combustion operation will be explained. When plug 11 is inserted into an outlet (not shown) (at this time, changeover switch PSW1 and interlocking switch PSW2 are on the NC side), the self-holding current flows through changeover switch PSW1, seismic switch ASW, diode _D1 , and resistor _R1. path, energizing the first relay RY1, closing its normally open contact RSY1a and opening its normally closed contact RYS1b. Normally open contact RYS1
By closing a, this first relay RY1
is self-maintained. Next, turn on the changeover switch PSW1.
When switched to the NO side (on side), power is supplied to each circuit subsequent to this changeover switch PSW1.
At this time, the interlock switch PSW2 is also switched to the NO side (off side). Therefore, no voltage is applied to the core lowering solenoid LS, and voltage is accumulated in the capacitor _C2 . The voltage stored in this capacitor _C2 is later used as a voltage to drive the core lowering solenoid LS.

The voltage stored in the capacitor C ₂ above is the resistance
It is also applied to the Zener diode ZD through R ₃ , R ₂ , and R ₄ . Therefore, the zener diode ZD
A constant voltage is generated across both ends of the . This makes the resistance
Voltage is stored in the time capacitor _C3 through _R7 . At the beginning of the accumulation of voltage in this capacitor _C3 , since the accumulated voltage is low, the potential of _P2 is higher than the potential of _P1 (the voltage dividing point potential of resistors _R5 and _R6 ), so the comparator IC The output of is low level. Therefore, the transistor Q is not turned on but remains off. Therefore, the second relay RY2 does not operate, and its contact RYS2 is connected to the terminal a.
It remains switched to the side. This drives the gear motor GM and the core begins to rise. Then, when the voltage stored in the time limit capacitor C ₃ increases and the potential of P ₂ becomes lower than the potential of P ₁ after a certain period of time, the output of the comparator IC becomes high level, and the feedback diode D ₆ turns on and a feedback current flows into the positive input terminal of the comparator IC through resistor _R8 , increasing the positive input voltage and stabilizing the operation of the comparator IC. When the output of the comparator IC becomes high level in this way, the transistor Q turns on and the second relay RY2 operates. This allows switching contact RYS
2 is switched to the terminal b side, the operation of the gear motor GM is stopped, the ignition device IG is activated, and the wick is ignited. By the way, the time from when the gear motor GM for wick lifting starts operating until the ignition device IG starts operating is the time until the output of the comparator IC is reversed, and this is because the wick lifting mechanism is not operating normally. Set it approximately equal to the time it takes for the core to reach the predetermined position.

To extinguish a combustion device that has been ignited as described above and is operating normally, turn on the selector switch.
Just set PSW1 to NC (off) side. When the changeover switch PSW1 is switched to the NC side, the power supply to each subsequent stage circuit section is immediately cut off. At the same time as this operation, interlock switch PSW2 also switches to the NC side, so
The voltage stored in capacitor _C2 is instantaneously applied to the wick lowering solenoid LS, which immediately lowers the wick and extinguishes the fire. As this capacitor _C2 is instantaneously discharged, the constant voltage applied to the timer circuit TM also disappears instantaneously. This allows the timer circuit to
In TM, only the voltage stored in the time capacitor _C3 remains, but this voltage is passed through the discharge diode.
It is discharged through _D5 and the timer circuit TM is reset. Further, since the second relay RY2 is in a de-energized state, the switching contact RYS2 is switched to the terminal a side. Since the timer circuit TM is instantly reset in this way, the changeover switch PSW1 is immediately reset.
Even if the power is turned on again, the accurate timer setting time, that is, the time required for the core to rise, can be taken.

Next, operations in the event of an earthquake or a power outage occurring during combustion operations will be explained. When an earthquake occurs, the seismic switch ASW turns off, so the voltage stored in the capacitor _C1 is transferred to the first relay RY1.
The first relay RY1 becomes de-energized, opens the normally open contact RYS1a, and releases the self-holding state. At the same time, the normally closed contact RYS1b is closed, and as a result, the voltage stored in the capacitor _C2 is instantly discharged, and the wick lowering solenoid LS is operated to forcefully lower the wick and extinguish the fire. In addition, if a power outage occurs during combustion operation, the first relay RY1 becomes de-energized in the same way as when the seismic switch ASW is turned off, the normally open contact RYS1a opens, and the normally closed contact RYS1b closes. . Therefore, the voltage stored in the capacitor _C2 is instantly discharged, and the wick lowering solenoid LS operates to forcibly lower the wick to extinguish the fire. In addition, the capacitor will be disconnected even if the seismic switch ASW mentioned above is opened or a power outage occurs.
The voltage stored in _C2 is applied to the core lowering solenoid LS.
Since the discharge occurs instantaneously through the fire, the timer circuit TM is reset and the switching contact RYS2 of the second relay RY2 is reset, similar to the normal fire extinguishing operation described above.
is on the terminal a side. In this case, the power on/off switch PSW1 is on the NO side (on side), and the self-holding of the first relay RY1 has been released, so even if the seismic switch is closed afterwards, Even when power is restored after a power outage, power is not supplied to each circuit and it will not start operating again.

As explained above, according to this invention, in a device that is equipped with a function of automatically raising the wick for a predetermined period of time and automatically igniting after the lapse of that period of time, the time required for the wick to rise is The settings of can be kept constant at all times, thereby making it possible to perform reliable ignition centering and ignition operations, thereby providing a combustion control device that can significantly improve safety and functionality.

[Brief explanation of the drawing]

The figure is a circuit diagram showing an embodiment of this invention. IC...comparator, L...core lowering solenoid, GM...gear motor, IG...igniter, C ₂
...Digestion capacitor, C ₃ ...Time limit capacitor, TM...Timer circuit, RY1...First relay, RY2...Second relay, PSW1...Power on/off switch.

Claims (1)

[Scope of utility model registration request] After the power switch is turned on, a wick lifting mechanism is activated to raise the wick, and when the wick rises to a predetermined position, an ignition mechanism is activated to ignite the wick.In this combustion control device, the wick that is in the raised position is lowered. a core lowering solenoid, a first capacitor that starts charging a voltage for supplying a drive voltage with a discharge current to the core lower solenoid in response to the turning-on operation of the power switch; an interlocking switch that is inserted in a power supply path for the core lowering solenoid of the capacitor, opens the power supply path in conjunction with the turning-on operation of the power switch, and closes the power supply path in conjunction with the opening operation; a second capacitor that starts charging using the charging voltage of the capacitor as a power source;
a discharge circuit that discharges the charging voltage of the second capacitor in response to the opening operation of the power switch;
A comparator whose output is inverted when the charging voltage of the second capacitor reaches a predetermined value, a switching element that is turned on by the inverted output of this comparator, a relay that is activated when this switching element is turned on, and this relay. A combustion control device comprising: a switching contact that switches an energization path from a wick lifting mechanism side to a wick ignition device side when activated.