KR900001857Y1 - Indicator of oil volume using for boiler - Google Patents

Abstract

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Description

Oil level display device of oil tank for boiler

1 is a block diagram of the present invention.

2 is a detailed view of a detection sensor, a 7 segment drive circuit, and an alarm signal detection circuit.

3 is a detailed view of the alarm circuit.

4 is a detailed view of the LED display circuit.

5 is a detailed view of a power supply circuit.

* Explanation of symbols for main parts of the drawings

1: level detection circuit 2: 7 segment drive circuit

3: LED display circuit 4: Alarm signal detection circuit

5: alarm circuit 6: power circuit

R1-R55: resistor Q1-Q12: transistor

IC1-IC3: Integrated Circuit C1-C12: Capacitor

Dl-D6: Diodes SD1-SDl4: Diodes

Z1-Z2: Zener Diodes SR1-SR10: Resistance

The present invention allows oil users to directly see the remaining amount of oil in oil tanks, such as boilers and hot air fans, and to know the remaining amount (remaining amount) when the oil is consumed up to a certain lower limit from a distance. The present invention relates to a flow rate indication and a supplementary automatic indication device of an oil tank for a boiler, which enables timely fuel supply.

In other words, the amount of oil consumed during the oil refilling or operation of the boiler is displayed numerically, and when the oil reaches a certain lower limit (e.g. 10ℓ), an alarm sounds automatically and the oil can be supplied in a timely manner. It is possible to prevent the operation of the boiler and the hot air fan due to the shortage.In case of oil injection, if the oil in the oil tank reaches the upper limit of recognition (e.g. 80ℓ), an alarm sounds once to prevent the fuel from overflowing. The oil is carefully injected and the number is automatically displayed on the LED display to visually check the flow rate when injecting or consuming.

Conventionally, there have been indications such as fuel consumption and storage status by the height displayed on the instrument panel or lighting the light emitting diodes by direct lighting. This method was inconvenient to check with the naked eye every hour, and in addition, in the home, the oil installed in the oil tank or the hot air blower that would completely consume the fuel without being able to supply fuel in a timely manner due to absence or carelessness. The air enters the pump, which causes the burner's automatic unit to shut off, and to replenish oil in this state, it is necessary to open the boiler and press the reset button on the automatic unit to wait for the oil pump to operate before restoring the air. There was an inconvenience, such as need to remove.

The present invention, in view of the conventional problems as described above, the remaining fuel in the oil tank is also displayed as a number, and at the same time the oil is to be supplied in advance before the fuel is completely consumed to enable the efficient operation of the boiler Another object of the present invention is to provide a circuit configured to inject fuel while being careful not to overflow fuel by generating an alarm sound when a certain upper limit is reached during fuel injection in an oil tank such as a boiler or a hot air fan. When described in detail based on the accompanying drawings as follows.

Bridge rectification circuit composed of diodes D3-D6 as shown in FIG. 5 and constant voltage circuit having constant voltage diode 22 and transistor Q9 and capacitor C7 (C8) and diode D1 (D2). An integrated circuit IC1 having a voltage capacity discriminating function as shown in FIG. 2 in constructing an oil remaining display device of a boiler and a hot air oil tank having a power circuit 6 composed of a double voltage rectifying circuit composed of And a detection sensor (S) and an integrated circuit (IC2), a resistor in a level detection circuit (1) consisting of a transistor (Q1-Q7), a diode (SD1-SD11) and a resistor (R7-R28) connected to an output terminal thereof. A capacitor (C2) and a resistor connected to the seven-segment drive circuit (2) consisting of (R30-R36) and connected to the alarm circuit (5) to the level detection circuit (1) and the seven-segment drive circuit (2). A detection circuit 4 composed of (R2l) (R22), transistor Q8, diodes SD12-SD14, resistor R29, and transistor Q12. After the determination, the LED display 3 is connected to the 7-segment live circuit 2, and the detection sensor S is composed of 10 steps using the resistors SR1 to SR10. The circuit 4 has a one-time alarm indicating circuit, a diode SD12-SD14, a resistor R29, and a transistor (C2) and a resistor (R21) (R22) connected in parallel and a transistor (Q8) connected thereto. A low flow rate alarm indicating circuit composed of Q12) is formed and connected to the alarm circuit 5.

In the figure, reference numeral AC denotes an AC power supply, and T1 denotes a transformer.

Referring to the effect of the present invention configured as described above are as follows.

1 is a schematic diagram of an oil level display device of an oil tank for a boiler or a hot air blower. S is a detection sensor in which fuel level is detected in 10 stages, 1 is a low level detection circuit, and 2 is a level detection circuit. A driving circuit which receives the output of the circuit 1 and turns on the LED display 3, 3 is a digital display device represented by LED, and 4 is a circuit which detects the output of the level detection circuit 1 to drive an alarm device. 5 is an alarm device and 6 is a constant voltage power supply circuit.

2 is a circuit diagram of FIG. 5, when AC voltage AC is applied, as shown in FIG. 5, a secondary voltage is generated by the transformer 71, and the voltage full-wave rectified through the bridge rectifying circuit D3-D6 is a constant voltage. It is applied to the diode (Z2) and transistor (Q9) and the capacitor (C5) is charged to a constant voltage after the constant voltage is charged, and also the power of the capacitor (C7), diode (D1) (D2) and capacitor (C8) Power is supplied to the integrated circuit IC3 in the alarm circuit 5 via the voltage rectification circuit.

In such a situation, if the oil remaining in the tank is connected to any part of the middle terminal of the resistor SR1-SR10 consisting of 10 stages during operation or supply of oil (this detection sensor S is used to detect the level of the flow rate). The circuit is connected to the resistance terminal of main figure by moving the pagoda to the sensor. The level is determined by the input circuit of the integrated circuit IC1 and applied to each resistor R7-R14. By changing the applied voltage, the BCD input signal is transmitted to the input resistors R25-R28 of the current collecting circuit IC2, and the BCD signal is input to the integrated circuit IC2 in the seven-segment drive circuit 2 connected thereto.

At this time, the integrated circuit (IC2) converts the input BCD signal into a 7-segment signal and turns on the LED display (3) to visually check the amount of oil supplied and the amount of reduction in steps as digital values. It is possible to do it.

Here, the output process for each input coming from the detection sensor in the integrated circuit IC1 with voltage capacity discrimination function will be described in more detail.In the integrated circuit IC1, a reference voltage for comparing and measuring the inputs is built-in. The voltage input according to the change in the resistance value in the flow rate detection sensor 5 is compared with the reference voltage for output.

The input voltage is set based on the resistors R5 and R6 connected to the input terminal, and the level of the flow rate is input to the input voltage changed by the resistors SR1-SR10 in the flow rate detection sensor S.

The output of the integrated circuit IC1 is connected to the ground of the integrated circuit IC1, where the terminal is connected to earth, and the terminals of the integrated circuit IC1 are all low. When the level terminal is connected to the resistor SR10, the output of the integrated circuit IC1 is connected to the resistor R7. The output terminal is 'high' (12V) state to supply a 'high' signal to the input terminal of the integrated circuit (IC2). At this time, 1 is displayed on the LED display pin 3.

When the level ruler is connected to the resistor SR9, the output terminal connected to the resistor R9 of the integrated circuit is 'high' to apply a voltage to the BCD input terminal of the integrated circuit IC2.

At this time, since the transistor 01 is operated to input the high potential output from the resistor R7 to the low level (0 V) to the integrated circuit IC2, the input terminal resistance R26 of the integrated circuit IC2 is input. ) 'H' is displayed in the LED display circuit (3).

When the level terminal is connected to the resistor SR8, the output terminal connected to the resistors R7, R8, and R9 becomes 'high' and the potential of the resistors R25 and R26 of the integrated circuit IC2 is 'high'. LED display circuit (2) The self-display is also possible, and the diodes SD1 to SD3 serve to block the reverse low voltage, thereby displaying the desired output.

When the level terminal is connected to the resistor SR7, the outputs of the resistors R7-R10 become 'high' (12V ') to transmit a signal to the integrated circuit IC2.

At this time, the transistors Q1, Q4, and Q5 make the potential of the input resistors R25 and R26 of the integrated circuit IC2 'low' (0V), so only the potential of the resistor R27 is 'high'. LED display circuit Is displayed.

When the level terminal is connected to the resistor SR6, the output of the resistors R7-R11 becomes 'high' to supply a signal to the BCD input terminal of the integrated circuit IC2.

However, when the output terminal of the resistor R11 is high, the potential of the input resistor R25 of the integrated circuit IC2 is high. Will be displayed.

When the level terminal is connected to the resistor SR5, the output terminals of the resistors R7-R12 are set to 'high' (12V) state, so that the potential of the term R26 (R27) of the integrated circuit IC2 is set to 'high' state. In this case, the transistor Q2 plays a switching role in which the resistor R25 makes the potential 'low' (0V).

Therefore, the output of the integrated circuit IC2 When the level terminal is connected to the resistor SR4, all of the output terminals of the resistors R7-713 are output in the 'high' state, so that the signal of the 'high' state is transmitted to the integrated circuit IC2. If the output potential of the resistor R13 is high, the potential of the input resistor R25 of the integrated circuit IC2 is increased. When connected to the level terminal resistor SR3, all of the output terminals of the resistors R7-R14 are output in a 'high' state to transmit a signal to the integrated circuit IC2, and thus the potential of the resistor R14. When is high, the potentials of the resistors R25, R26, and R27 connected to the integrated circuit IC2 by the transistors Q5, Q7, and Q3 become 'low' states, but only the potential of the resistor R28 is It becomes 'high' state.

Therefore, the output of the integrated circuit IC2 In this case, the capacitors C20, resistors R21, R22, R52, and transistors Q8 are circuits that provide a one-time alarm when the flow rate is 80L.

When the level terminal is connected to the resistor SR2, the output states of the resistors R7 to R15 connected to the integrated circuit IC1 are all 'high', but the integrated circuit IC2 is operated by the operations of the transistors Q1 to Q7. The input of 'R' and the resistor 'R28' are only in the 'high' state. Will be displayed.

In addition, since the output terminal of the integrated circuit IC1 is an open collector type, the resistors R-R15 are resistors for applying a voltage to the collector terminal. The integrated circuit is a combination of the diodes SD1-SD11 and transistors Q1-Q7. (IC1) The output comes out according to the change other than the input, but the BCD signal is supplied to the input terminal of the integrated circuit (IC2) by the combination of the transistor and the diode to The output can be changed while changing.

The integrated circuit IC1 in the level detecting circuit 1 which acts as described above receives an analog input and sequentially outputs the output, i.e., an IC element that outputs a voltage 'high' (12V) to 'low' (0V). The potential of the input is compared to the internal reference voltage of the integrated circuit IC1 and output to the output terminal connected to the resistors R7-R15. The output is obtained by the combination of the diodes SD1-SD11 and transistors Q1-Q7. The voltage is converted into a BCD code and applied to the input terminal of the integrated circuit IC2.

Then, the LED display circuit (LED display: 3) signal transmission process in the 7 segment drive circuit 2 and the LED display display form according to each level will be described in detail, the integrated circuit (IC2) of the 7 segment drive circuit (2) ) Receives the BCD input and outputs it through the resistor (R30-R36). It is designed to display up to.

When the level terminal is connected to the resistor SR10, if the input of the resistor R25 is 'high' (12V), the potential of the output resistor (R3l) (R32) becomes 'high', By the high signal When the level terminal is connected to the resistor SR9, the input of the resistor R26 becomes 'high' and the output stage resistors R30, R3l, R33, R34, and R36 become 'high'. High level and supply 'high' signal to the corresponding terminal of LED display. When the level terminal is connected to the resistor SR8, the voltage terminal connected to the integrated circuit IC2, the resistor R25 and the resistor R27 becomes 'high' and the resistor R30 (R3l) (R32) (R33) (R36) The output terminal becomes 'high' state, so the corresponding terminal of LED display is supplied with 'high' state. It is supposed to display.

When the level terminal is connected to the resistor SR7, the integrated circuit IC2 is input to the input terminal resistor R27 with a 'high' state so that only the output connected to the resistors R3l (R32) (R35) and R36 is 'high'. 'State' to supply the 'high' signal to the corresponding terminal of the LED display When the level terminal is connected to the resistor SR6, a 'high' state is inputted to the BCD input terminal resistors R27 and R25 of the integrated circuit IC2, so that the resistors R30, R32 and R33 are input. Output terminal connected to (R35) (R36) becomes 'high' state by supplying 'high' signal to the corresponding terminal of LED display Will be displayed.

When the level terminal is connected to the resistor SR5, the potential of the integrated circuit IC2 input terminal resistors R26 and R27 becomes 'high' and the output of the integrated circuit IC2 is connected to the resistors R32 and R33 ( It outputs 'high' to R35) (R36) and supplies 'high' signal to the LED display. When the level terminals are sequentially connected to SR4-SR2, the output of the integrated circuit IC2 changes according to the input change of the integrated circuit IC2 to display the LED display. Will output

Where the LED display is the In order to display, as shown in FIG. 4, the resistors R37 to R42 are fixed and displayed.

Meanwhile, in FIG. 2, a signal is supplied to the transistor Q12 through the resistors R29 and R52 by the voltage detection of the diodes SD12-SD14 to operate the integrated circuit IC3 by the operation of the transistor Q12. Or to stop or generate an alarm sound.

That is, in the circuit of FIG. 2, when the level terminal is connected to the resistor SR3 in the circuit of FIG. 2, the output terminal connected to the resistor R14 of the integrated circuit IC1 becomes 'high' and the capacitor C2 and the resistor are connected. The time constant of R21 supplies the bias voltage to operate the transistor 78 through the resistor R22.

At this time, the transistor Q8 grounds the bias voltage of the transistor Q12 connected to the collector side thereof to supply the 'high' signal to the input control terminal of the integrated circuit IC3 of FIG. 3 by the collector terminal of the transistor Q12. do.

At this time, only one alarm sounds by the time constant of the capacitor C2 and the resistor R2l, and the low flow alarm has all the inputs of the integrated circuit IC2 when the level terminal is connected to the earth terminal resistance SR10. In the case where the signal is 'low' and only the resistor R26 is 'high', the bias voltage is not supplied to the transistor Q12, so the 'high' potential is supplied to the alarm terminal of the integrated circuit IC3 shown in FIG. The alarm will continue to sound.

In addition, when the 'high' signal is supplied through the diode (SD12-SD14), the alarm does not sound automatically, so the alarm sounds only at low flow rates.

In other words, when the oil continues to decrease and reaches a certain lower limit (e.g. 10 L), an alarm sound (crick sound) is generated in the integrated circuit IC3 by driving the transistor Q12 by the detection action of the diodes SD12-SR14. In addition, when the oil reaches the predetermined upper limit (e.g., 80 L) when supplying oil into the tank, the transistor C1 is connected to the transistor through the capacitor C2 in the one-time alarm indicating circuit including the capacitor C2, the resistors R12 (R22), and the transistor Q8. (Q8) is driven so that the alarm circuit (5) generates a single alarm sound so that oil can be slowly and carefully inserted, wherein the alarm circuit (5) is integrated circuit (IC3) and transistors (Q10) and (Q11). In the level detection circuit 1, an encoder circuit can be provided as the transistors Q1-Q7 and the diodes SD1-SD11 to provide a cheap circuit.

As such, the present invention notifies the time of replenishment due to the remaining fuel consumption in various oil tanks of the boiler and the hot air fan so that the fuel can be supplied in a timely manner, and also prevents air from entering the fuel pump and eliminates the inconvenience caused by this. When the oil reaches a certain upper limit (e.g. 80ℓ), the alarm device operates to generate one alarm sound, so that the oil does not overflow from the tank due to carelessness and the amount of oil remaining. By digitally displaying the flow rate in the tank, you can check the flow rate in the tank directly with your own eyes. By attaching the device of this circuit to the oil tank for industrial or home use, you can operate the boiler safely and conveniently. It is a novel design that is further enhanced in its use value.

Claims (2)

In the configuration of the oil remaining amount display device of the boiler and hot air oil tank having a power supply circuit 6 composed of a rectifying circuit, a constant voltage circuit, and a double voltage rectifying circuit, the integrated circuit IC1, transistors Q1-Q7, and diodes ( 7-segment drive circuit (2) consisting of a detection sensor (S), integrated circuit (IC2), and resistors (R30-R36) in a level detection circuit (1) consisting of SD1-SD11) and resistors (R7-R28). ), The capacitor C2, the resistor R21 (R22), the transistor Q8, and the diode (the alarm circuit 5 is connected to the above-described level detection circuit 1 and the 7 segment drive circuit 2). After connecting the detection circuit (4) consisting of the SD12-SD14, the resistor (R29), the transistor (Q12), the LED display (3) is connected to the seven segment drive circuit (2). Oil level indicator of boiler oil tank. 2. The alarm circuit (5) according to claim 1, comprising an alarm circuit (5) having an integrated circuit (IC3) and transistors (Q10) (Q11), one end of which is applied to the base of the transistor (Q8) via a resistor (R43), and the other end thereof. To the collector of the transistor Q12, and the oil remaining amount display device of the oil tank for boiler.