JPH0443693Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to an odor reduction device for a top-and-bottom wick oil combustor that operates in conjunction with extinguishing operations.

<Prior Art> FIG. 3 is a circuit diagram of a conventional odor reduction device when it is stopped and when it is in operation.

FIG. 4 is a circuit diagram of a conventional odor reduction device during preparation for operation.

In Figures 3 and 4, 1 is a dry cell as a power source, Q ₃ , Q ₄ , and Q ₅ are transistors, Q ₃ is a transistor for a switch, and Q ₄ is a motor for a fan motor for odor absorption. Operates as a driver transistor. C ₃ and C ₄ are each capacitors, and C ₃ is a starting capacitor.
_C4 acts as a timer capacitor. 4,
5 are comparator ICs.

The operation will be explained below with reference to the drawings.

When the kerosene stove is stopped, the odor reduction device (hereinafter referred to as the circuit) is in the state shown in Figure 3.
Transistors Q ₃ , Q ₄ , and Q ₅ are each turned off, and power is not supplied to comparator ICs (hereinafter referred to as ICs) 4 and 5, so their outputs are undefined. Next, when the kerosene heater is ignited from the stopped state and transitioned to the operating (combustion) state, the circuit connects switch _S2 from contacts a-b to contacts a-c in conjunction with the ignition operation, and from power supply 1. IC4 through contacts a-c of switch _S2 ,
5 and starts charging the capacitor _C3 . At the same time, transistor Q ₅ turns on, and transistor Q ₃ turns on (see FIG. 4). At this time, the output of IC 4 is undefined.

Next, when the kerosene heater is extinguished, the switch _S2 is connected from contacts a-c to contacts a-b in conjunction with the extinguishing operation, and the circuit becomes operational (see FIG. 3). At this time, the charge stored in the capacitor C ₃ causes the transistors Q ₃ , Q ₅ and the IC to
4 and 5 are continuously energized. transistor Q ₃
When turned on, current flows through contacts a and b of switch _S2 to the "+" inputs of ICs 4 and 5, and
By turning on the transistor _Q4 , the odor absorbing fan motor M is driven. At this time, due to the capacitor _C4 installed at the "-" side input part of IC4,
The output of IC4 is "H", transistors _Q3 and _Q5 are turned on continuously, and timer capacitor _C4 starts charging. After the set time, the voltage at the connection point 6 of the resistor _R5 connected to the capacitor _C4 is divided by the resistors _R3 and _R4 , which are the "+" input part of the IC4. When the set voltage is exceeded, IC4 is inverted, the output of IC4 becomes "L", and transistors Q ₃ and Q ₅ are turned off. Due to the OFF operation of transistor Q ₃ , transistor Q ₄ is not energized and turns OFF, so the odor absorption fan motor M stops and ICs 4 and 5
is not supplied with power, and transistor _Q5 does not turn on. Therefore, the circuit drives the odor absorbing fan motor M in conjunction with the extinguishing operation of the kerosene stove, and after a set time, the drive is stopped and the circuit is de-energized.

However, the circuit with the above configuration has the following drawbacks.

When the kerosene heater starts to ignite, the circuit becomes ready for operation, but in order to charge capacitor _C3 ,
Transistors Q ₃ , Q ₅ , ICs 4 and 5, and the resistor are energized, and current is continuously consumed while the kerosene stove is burning (the circuit is ready for operation).The current consumption is approximately 0.7 mA, and the power supply When a dry cell battery is used, the disadvantage is that the dry cell battery wears out quickly and the life of the dry cell battery is shortened.

Note that IC5 constitutes a reset circuit for capacitor _C4 , and during operation (see Figure 3), if capacitor _C4 has been charged in advance, the charging time (timer setting time) of capacitor _C4 will fluctuate. If the charge is stored in the capacitor _C4 without being naturally discharged, the "-" side input part of IC5 will be forced to discharge from the "+" side input part. Therefore, the output of IC5 is reversed from "H" output to "L" output, and the charge accumulated in capacitor _C4 is forcibly discharged to the output side of IC5.

<Purpose> This invention was developed to eliminate the above-mentioned drawbacks, and it reduces the current consumption during the combustion operation of a kerosene stove, which is the ready state for operation of the odor reduction device that drives the odor absorption fan motor in conjunction with the extinguishing operation. The aim is to reduce

<Example> FIG. 1 is a circuit diagram of the odor reduction device of the present invention when it is stopped and when it is in operation.

FIG. 2 is a circuit diagram of the odor reduction device of the present invention in preparation for operation.

In FIGS. 1 and 2, 1 is a dry battery that supplies current, and 2 is a diode. Q ₁ and Q ₂ are transistors, Q ₁ is a switch transistor, and Q ₂ is a motor driver transistor for an odor absorbing fan motor. R is a bias resistor. C ₁ and C ₂ are each capacitors, with C ₁ operating as a starting capacitor and C ₂ operating as a timer capacitor. 3 is IC.

The operation will be explained below with reference to the drawings.

Figure 1 shows the odor reduction device of the present invention (hereinafter referred to as the circuit) when the kerosene stove is stopped; in this state, transistors Q ₁ and Q ₂ are each OFF, and
IC3 is not supplied with power and its output is undefined. Next, when the kerosene stove is ignited from the stopped state and transferred to the operating state, the circuit is linked to the ignition operation, switch _S1 is connected from contacts a-b to contacts a-c, and resistor _R1 is connected from power source 1. through capacitor C from contacts a-c of switch _S1 to the cathode of power supply 1, capacitor _C1 starts charging and the circuit is ready for operation.

Next, when the kerosene stove is extinguished, the circuit is linked to the extinguishing operation and the contacts of switch _S1 are connected to contacts a-c.
is connected to contacts a and b, and the circuit becomes operational. (See Figure 1) At this time, the charge stored in the capacitor _C1 turns on the transistor _Q1 . When the transistor _Q1 is turned on, the power supply and input section of the IC3 are energized, and when the transistor _Q2 is turned on, the odor absorbing fan motor M is driven. At this time, the output of IC3 is "L" due to the capacitor _C2 provided at the "+" side input part of IC3, and the transistor _Q1 continues to be in the ON state. At the same time, timer capacitor _C2 starts charging.

After the set time, when the charging voltage charged in the capacitor _C2 exceeds the set voltage as a divided voltage between the resistor _R2 , which is the "+" input part of IC3, and the capacitor _C2 . , IC3 are inverted, and the output of IC3 changes from an "L" output to an "H" output, and is transmitted to the contact a via the resistor. That is, a time-up signal is output from the IC 3, and this signal is supplied to the contact a via the current-carrying path. Therefore, transistor _Q1 is turned off. Due to the OFF operation of transistor Q ₁ , transistor Q ₂ is not energized and turns OFF, so the odor absorbing fan motor M stops, and power is not supplied to IC 3, and the charge in capacitor C ₁ is discharged. , transistor Q ₁
is not turned on. As a result, in the circuit of the present invention, even in the operational ready state, the circuit is cut off by the transistor _Q1 , so there is no power consumption in IC3, and the current consumption of the circuit in the operational ready state is the leakage current of the transistor _Q1 ( The leakage current is less than 100nA, which is a great practical advantage in reducing the power consumption of the dry cell battery to a minimum.

Note that if the diode 2 is previously stored in the capacitor C ₂ , the charging time (timer setting time) of the capacitor C ₂ will vary, so the diode 2 is forcibly discharged when the circuit is stopped.

<Effects> According to the odor reduction device of the present invention, a charging circuit is formed for the capacitor means used to turn on the power supply transistor during the combustion state, that is, before the odor absorption fan motor operates. This eliminates unnecessary power consumption and extends the life of the dry cell battery that is the power source.

Moreover, even if the wick is returned to the combustion position immediately after extinguishing the fire, the on-power supply to the power supply transistor is directly stopped by switching the contacts, so the absorption fan motor can be stopped quickly and reliably. . In addition, in the case of a configuration in which the power supply to the absorption fan motor is indirectly stopped using the charging current to the capacitor means based on switching of the contacts, it is uncertain that the power supply will stop due to contact failure, transistor ratings, etc. There is a risk that it will become.

[Brief explanation of the drawing]

Figure 1: Circuit diagram of the motor driver and timer circuit of the present invention when stopped and when in operation. Figure 2: Circuit diagram of the motor driver and timer circuit of the present invention during preparation for operation. Figure 3: Circuit diagram of a conventional motor driver and timer circuit when it is stopped and when it is in operation. Figure 4: Circuit diagram of a conventional motor driver and timer circuit during preparation for operation. Code, 1...Power supply, 2...Diode, 3,
4, 5... Comparator IC, 6... Connection point,
S ₁ , S ₂ ... switch, Q ₁ , Q ₂ , Q ₃ , Q ₄ , Q ₅ ...
Transistor, R, R ₁ , R ₂ , R ₃ , R ₄ , R ₅ ... Resistor, C ₁ , C ₂ , C ₃ , C ₄ ... Capacitor.

Claims (1)

[Scope of Claim for Utility Model Registration] A switch whose contacts are selectively switched in accordance with the extinguishing position and the combustion position of the wick, and an odor absorbing fan motor that operates in response to the switching of this switch to the extinguishing position. , an odor reduction device comprising a timer circuit section that controls the operating time of the odor absorption fan motor, a power source, a power supply transistor that controls supply of the power source to the timer circuit section, and a contact point located at a combustion position. When the contact point is set to the extinguishing position, a discharge circuit is formed for the capacitor means via the switch and the bias resistor of the transistor. A discharge control circuit for the capacitor means that immediately stops and turns off the on-power supply to the power supply transistor when the power supply transistor is turned on and the contact is switched to the combustion position side; and the timer. Odor reduction in a top-and-bottom wick type oil combustor, characterized in that it is provided with an energizing path for supplying a circuit time-up signal to the discharge control circuit to turn off the power supply transistor and discharging the charge in the capacitor means. Device.