KR200170200Y1 - Delay time of ventilator - Google Patents

Abstract

The present invention relates to a delay circuit for a fan, the power supply unit 10 for rectifying and transforming the power supplied from the outside, and the lighting lamp 30 or the fan 60 that is turned on or off by the supply of power wiring In the connected circuit, the operation switch unit 20 for turning on or off the lamp 30 by switching the voltage applied from the power supply unit 10 through the resistor (R7) and diode (D5); The diode D6 is connected to the first transistor TR1 that is switched to the voltage applied to the base terminal through the operation switch unit 20 through the resistor R8, and the emitter terminal of the first transistor TR1. A switching unit 50 composed of a silicon controlled rectifier (SCR) for switching the voltage applied to the gate terminal to drive the fan 60; When the operation switch unit 20 is turned off, the switching unit 50 is turned on by the time constants of the capacitors C2 and R5 to R7 formed through the plurality of resistors R5 to R7 due to the discharge of the capacitor C2. It includes a delay unit 40 for driving the fan 60 by turning it on for a predetermined time, and at the same time lighting the lamp and the fan installed in a predetermined space requiring lighting and ventilation, such as a toilet, by simultaneously operating a mechanical switch When the lamp is off, the lamp is turned off but the fan is delayed to run for a certain time.

Description

Ventilator delay circuit

The present invention relates to a circuit for delaying the operation of electrical appliances, and in particular, lights and fans installed in a predetermined space requiring lighting and ventilation at the same time, such as a toilet, are simultaneously turned on by the operation of a mechanical switch or any one of them is constant. A delay circuit for a fan that is turned off after being delayed for a time.

Conventionally, in a small space, such as a bathroom or a washroom, where lighting and ventilation must be performed or maintained at the same time, the lighting and the fan must be driven separately. In other words, in order to maintain good ventilation at all times, it was necessary to continuously operate the fan or manually operate the fan. Separately, the lamp should only be activated when using the toilet or washbasin.

As described above, in the attached block diagram of FIG. 1, a power supply unit 1 for supplying power to an AC power source (AC 110-220V) applied from the outside through an outlet and the like, and a power source applied from the power supply unit 1. A lamp switch 2 and a fan switch 4 for switching the lamp, a lamp 3 which is turned on or off by switching of the lamp switch 2, and a fan driven or stopped by switching of the fan switch 4; 5) is wired and connected.

The lamp 3 and the fan 5 which are connected in this way are connected to the power supply 1 separately, respectively, and the lamp 3 and the fan 5 were operated by the on or off operation of this switch. That is, when the user enters and exits the toilet, the lighting switch 2 is turned on or off for lighting in the bathroom, and the fan switch 4 for ventilation in the bathroom even when the toilet is in use or not in use. Operate the fan 5 to operate. At this time, the illumination light switch (2) to operate for lighting when entering and exiting the toilet or the ventilator switch (4) to operate for ventilation of the toilet are to be operated separately.

However, conventionally, when a user uses a restroom (or a washroom, etc.), that is, every time the restroom is in and out, the lighting should be turned on or off, and a fan must be driven for ventilation when using the restroom or after use. That is, when using the toilet, the lamp and the fan should be operated at the same time, or after using the toilet, even if the lamp is turned off, the fan should continue to operate for ventilation for a certain time. In addition, if a certain time passes after the use of the toilet, there is a inconvenience to stop the operating fan.

In this way, it is not possible to accurately determine the time to stop the operation of the ventilator installed in the toilet, because the ventilator continues to operate even after the ventilation of the toilet to some extent there is a problem that the unnecessary power is consumed, the life of the ventilator is also shortened.

The present invention has been devised to solve the above problems, the lighting and the operation of the ventilator is made at the same time, even after the light is turned off, after the fan continues to operate for a certain time to maintain a comfortable toilet. Another object of the present invention is to provide a delay circuit for a fan that prevents unnecessary power consumption.

1 is a block diagram of the operation of a lamp and a fan according to the prior art,

Figure 2 is a block diagram of the operation of the lamp and the fan according to the present invention,

Figure 3 is a circuit diagram for delaying the operation of the lamp and the fan applied in the present invention.

♣ Explanation of symbols for the main parts of the drawing

10: power supply unit 20: operation switch unit

30: lighting 40: delay

50: switching unit 60: ventilator

C1, C2: capacitors D1 to D6: diodes

LED: Light Emitting Diode ZD: Zener Diode

TR1, TR2: Transistors R1-R12: Resistance

SCR: Silicon controlled rectifiers SW1 to SW3: Switch

L: coil

In order to achieve the above object, the present invention provides a power supply unit for rectifying and transforming power applied from the outside, a lamp that is turned on or off by supplying power, and a fan that is turned on or off by supplying power. A circuit comprising: an operation switch unit for turning on or off a lamp by switching a voltage applied through a resistor and a diode from the power supply unit; The first transistor is switched to the voltage applied to the base terminal through the operation switch unit and the silicon control connected to the emitter terminal of the first transistor is switched to the voltage applied to the gate terminal through the diode to drive the fan. A switching unit composed of rectifier elements; And a delay unit for driving the fan by turning on the switching unit for a predetermined time with a capacitor formed through a plurality of resistors due to the discharge of the capacitor and a resistance time constant when the operation switch unit is turned off.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 2 is a block diagram of the operation of the lamp and the fan according to the present invention, Figure 3 is a circuit configuration for delaying the operation of the lamp and the fan applied in the present invention.

The power supply unit 10 rectifies and converts an AC power source AC220V applied from the outside into a DC voltage which is a voltage for driving a circuit, and outputs the instantaneous peak current or noise included in the input AC power source AC220V. Filter capacitor (C1), filter coil (L) for transforming and filtering the AC power supply AC220V through the capacitor C1 to a constant voltage, and a resistance indicating that the AC power supply AC220V is being applied. A plurality of diodes D1 to D4 for rectifying the R1 and the light emitting diode LED and the AC power source AC220V applied through the coil L and converting the same into a DC voltage having a constant size are configured. The plurality of diodes D1 to D4 are configured in a bridge shape to rectify an applied AC current to a DC current. In this case, the capacitor C1 and the plurality of diodes D1 to D4 are configured as elements capable of withstanding the breakdown voltage with respect to the applied voltage. Resistors R11 and R12 for distributing the DC voltages output from the plurality of diodes D1 to D4 are coupled in parallel with the plurality of diodes D1 to D4.

The operation switch unit 20 turns on or off the AC power source AC220V applied by switching the mechanical switch tumbler switch SW1 and the operation switch SW2 through the diode D5 via the resistor R13. Switch. That is, the lighting lamp 30 connected to the tumbler switch SW1 is turned on or off by the on or off operation of the tumbler switch SW1 and the operation switch SW2. The lamp 30 is composed of a lamp (LAMP), a plurality of lamps in series or in parallel in the corresponding load capacity. The tumbler switch SW1 and the operation switch SW2 are linked to each other to perform simultaneous operation. In addition, when the tumbler switch SW1 and the operation switch SW2 are turned on, the fan 60 and the lamp 30 are turned on at the same time, and the tumbler switch SW1 and the operation switch SW2 are turned off. At the time, the lamp 30 is turned off, but the fan 60 is configured to be delayed off for a predetermined time.

The switching unit 50 drives the fan 60 due to the on or off of the operation switch unit 20, and is turned on by the voltage signal of the operation switch unit 20 applied to the base through the resistor R8. The first transistor TR1 and a silicon-controlled rectifier SCR for driving a fan 60, which is not shown, are applied to the gate terminal when a voltage conducted through the emitter terminal of the first transistor TR1 is applied to the gate terminal.

In addition, the delay unit 40 is formed through a plurality of resistors R5 to R7 by the discharge of the capacitor C2 that has been charged due to the switching off of the operation switch SW1 of the operation switch unit 20. The switching unit 50 is turned on for a predetermined time with the time constants (τ 1 = C 2 · R 1, τ 2 = C 2 · R 2, τ 3 = C 2 · R 3) of the capacitor C 2 and the resistors R 5 to R 7, and the fan 60 is turned on. Drive. In addition, the delay unit 40 includes distribution resistors R2 and R3 for distributing the voltage discharged from the capacitor C2, a zener diode ZD for conducting current in both directions, and distribution of the power supply unit 10. The second transistor TR2 to which the voltage divided between the resistors R11 and R12 is applied to the base terminal and switched, and the slide switch SW3 having a plurality of contacts for selectively connecting the resistors R5 to R7 are provided. Included. Resistors R5 to R7 each having a predetermined magnitude of resistance are connected to the collector terminal of the second transistor TR2 at each contact point of the slide switch SW3.

Referring to the operation of the delay circuit of the ventilator according to the present invention configured as described above, when the tumbler switch (SW1) and the operation switch (SW2) configured to interlock with one side of the toilet wall is turned on, the AC power source (AC220V) applied from the outside is It is output through the power supply unit 10 and is applied to the operation switch SW1 through the diode D5 via the resistor R13. The diode D5 is applied to the resistors R2 and R8 and the capacitor C2 only through the operation switch SW2 during the + half cycle of the applied AC power source AC220V.

The capacitor C1 configured in the power supply unit 10 removes noise included in the AC power source AC220V applied from the outside and prevents overvoltage or overcurrent that is instantaneously applied. The coil L wired in parallel with the condenser C1 transforms the AC power output through the condenser C1 into a voltage of a predetermined magnitude. In addition, the light emitting diode LED configured in parallel with the coil L indicates that the AC power source AC220V is being applied by the emitted light. This indicates the on or off state of the switch. In addition, the AC voltage transformed from the coil L into a predetermined size is rectified to a DC voltage through the plurality of diodes D1 to D4 formed as bridges. The rectified DC voltage is divided and outputted by a constant voltage from the distribution resistors R11 and R12 connected in parallel.

On the other hand, the voltage signal applied through the resistor (R8) to the ON of the operation switch SW1 of the operation switch unit 20 is input to the base terminal of the first transistor (TR1) to turn on the first transistor (TR1). . The first transistor TR1 conducts the DC voltage applied through the resistor R10 connected to the collector terminal to the emitter terminal by the voltage applied to the base terminal. The voltage signal conducted by turning on the first transistor TR1 is applied to the gate terminal of the silicon controlled rectifying element SCR via the reverse voltage preventing diode D6 connected to the emitter terminal to switch the silicon controlled rectifying element SCR. Let's do it. Accordingly, the fan 60 connected to the silicon control rectifier SCR is driven at the same time as the lighting 30 is turned on to ventilate the bathroom.

As described above, the user switches the tumbler switch SW1 and the operation switch SW2 while the lamp 30 and the fan 60 are turned on and driven by the switching of the tumbler switch SW1 and the operation switch SW2. When turned off, the lamp 30 connected to the tumbler switch SW1 and turned on is turned off and turned off. At this time, the capacitor C2, which is connected and charged in series with the operation switch SW2, is discharged and continues to turn on the first transistor TR1 through the resistor R8 while being discharged to a predetermined potential (about + 25V). State, and the conduction state of the first transistor TR1 keeps the silicon-controlled rectifier element SCR on through the emitter stage diode D6, so that the fan 60 continues to be driven. . This is maintained for a predetermined time due to the time constant between the capacitors C2 and the resistors R5 to R7 connected to the respective contacts of the slide switch SW3. The slide switch SW3 has a plurality of contacts, and resistors R5 to R7 having different resistance values are connected to the contacts, so that the capacitor C2 and the resistors R5 to R7 are operated according to the operation of the slide switch SW3. Since the time constant of is changed, the first transistor TR1 and the silicon controlled rectification element SCR are maintained for a predetermined time by the time constant. That is, after the user turns off the tumbler switch SW1 and the operation switch SW2, the time constant between the capacitor C2 and the resistors R5 to R7 is controlled by the contact operation of the slide switch SW3 after the operation time of the fan 60 is switched. ? 1 = C2 · R1,? 2 = C2 · R2,? 3 = C2 · R3) can be set. The resistors R5 to R7 connected to the contacts of the slide switch SW3 are connected to the collector terminal of the second transistor TR2 so that the voltage applied from the distribution resistors R11 and R12 of the power supply unit 10 is the base end. Is inputted to make the second transistor TR2 turn on. The distribution resistors R2 and R3 and the zener diode ZD configured in parallel at the collector terminal and the emitter terminal of the second transistor TR2 are turned on to form a bias voltage.

Therefore, the present invention operates the tumbler switch SW1 and the operation switch SW2 in the on state when the toilet is used to turn on and drive the lamp 30 and the fan 60, and the tumbler switch SW1 and the operation switch ( The lamp 30 is turned off by the operation of switching off SW2), but the fan 60 is stopped after driving for a predetermined time (for example, 1 to 5 minutes) by the contact operation of the slide switch SW3. Maintains comfort and prevents the fan 60 from being driven without permission, thereby reducing power consumption.

As described above, the delay circuit for the ventilator of the present invention has the operation of switching on the first transistor and the silicon-controlled rectifier element by turning on or off the operation switch, turning on the lamp and driving the fan, and turning off the operation switch. By delaying the operation of the fan due to the time constant change of the resistor connected to the contact point of the condenser and the slide switch of the delay unit, there is an effect of limiting unnecessary power consumption by maintaining the comfort of the active restroom and stepless driving of the fan.

Claims (2)

In the circuit connected to the power supply unit 10 for rectifying and transforming the power applied from the outside, and the illumination lamp 30 or the fan 60 that is turned on or off by the supply of power, An operation switch unit 20 for turning on or off a lamp 30 by switching a voltage applied from the power supply unit 10 through a resistor R7 and a diode D5; The diode D6 is connected to the first transistor TR1 that is switched to the voltage applied to the base terminal through the operation switch unit 20 through the resistor R8, and the emitter terminal of the first transistor TR1. A switching unit 50 composed of a silicon controlled rectifier (SCR) for switching the voltage applied to the gate terminal to drive the fan 60; Time constants of the capacitor C2 and the resistors R5 to R7 formed through the plurality of resistors R5 to R7 due to the discharge of the capacitor C2 when the operation switch unit 20 is turned off (τ1 = C2 · R1, τ2). = C2 · R2, τ3 = C2 · R3, the delay circuit for the ventilator, characterized in that it comprises a delay unit (40) for turning on the switching unit 50 for a predetermined time to drive the fan (60). The method of claim 1, wherein the delay unit 40 Distribution resistors R2 and R3 for distributing the voltage discharged from the capacitor C2; Zener diode (ZD) for conducting current in both directions, A second transistor TR2 to which a voltage distributed between the distribution resistors R11 and R12 of the power supply unit 10 is applied to the base terminal and switched; And a slide switch (SW3) having a plurality of contacts for selectively connecting said resistors (R5 to R7).