CN217470334U

CN217470334U - Time-delay turn-off circuit

Info

Publication number: CN217470334U
Application number: CN202122897456.0U
Authority: CN
Inventors: 赵东波
Original assignee: Ningbo Klite Electric Manufacture Co Ltd
Current assignee: Ningbo Klite Electric Manufacture Co Ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-09-20
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses a time delay turn-off circuit, including rectifier filter circuit, switch converting circuit, output circuit and the main illumination LED lamp cluster that electricity is connected in proper order, output circuit is connected with auxiliary transformer, charging circuit and electric power storage circuit electricity in proper order, and on-off state detection circuitry is connected with charging circuit and time delay illumination LED lamp cluster electricity in proper order, and when the switch turn-off, turn-off main illumination LED lamp cluster opens time delay illumination LED lamp cluster, turns-off time delay illumination LED lamp cluster after the time delay. The utility model has the advantages of simple structure, low cost, high controllability, adjustable delay time, flexibility and easy use, and can satisfy the use under multiple scenes.

Description

Time-delay turn-off circuit

Technical Field

The invention relates to the field of electronic circuits, in particular to a time delay turn-off circuit.

Background

In many application occasions, such as the patrol and examine of building site, factory building etc. people need the short time illumination of lamps and lanterns, and electric power automation equipment plays crucial effect in electric power system. The delay turn-off circuit in the prior art lacks a special IC chip and a control circuit, and has high cost and poor controllability.

Chinese patent publication No. CN104113951A discloses a time-delay turn-off circuit and a lamp with the time-delay turn-off function, the time-delay turn-off circuit includes: the circuit comprises a rectifying circuit, a loop control circuit, a turn-on circuit and a delay turn-off circuit, wherein a first alternating current input end of the rectifying circuit is used for being connected to a load, a first direct current output end of the rectifying circuit is connected to the loop control circuit, the turn-on circuit receives an operation signal of a user and outputs a turn-on driving signal, and the delay circuit outputs a turn-off driving signal after the loop control circuit is turned on for delay time. The contradiction between the cutoff current and the saturation conduction condition of the triode in the technical scheme can influence the normal work of the lamp, the tube voltage drop of the triode is large, extra power consumption can be generated, and the adjustable range of the delay time is still low even under the condition of low working current.

Disclosure of Invention

The utility model discloses it is with high costs mainly to solve the time delay turn-off circuit among the prior art, and the poor not enough of controllability provides one kind with low costs, strong, the time delay adjustable time delay turn-off circuit of time delay nature, through the chip receiving circuit operating signal among the charging circuit, when the switch turn-off, turns off main illumination LED lamp cluster, opens time delay illumination LED lamp cluster, turns off time delay illumination LED lamp cluster behind the delay certain time.

A time-delay turn-off circuit comprises a rectifying filter circuit, a switch conversion circuit, an output circuit and a main lighting LED lamp string which are sequentially and electrically connected, wherein the output circuit is sequentially and electrically connected with an auxiliary transformer, a charging circuit and a power storage circuit, and a switch state detection circuit is sequentially and electrically connected with the charging circuit and the time-delay lighting LED lamp string. The rectification filter circuit converts alternating current into direct current with stable voltage, and the delay turn-off circuit does not interfere with a power grid; the switch conversion circuit converts the electric signal into a high-frequency electric signal, reduces an output rectifying and filtering element, and provides constant current for the main lighting LED lamp string through the output circuit; the auxiliary transformer generates stable voltage for the charging circuit; the charging circuit charges a capacitor in the electric storage circuit when the switch is closed and provides a protection function; when the switch state detection circuit detects that the switch is turned off, the signal is transmitted to the charging circuit, so that the main lighting LED lamp string is turned off, the delay lighting LED lamp string is turned on, and the delay lighting LED lamp string is turned off after a certain time delay. The time-delay turn-off circuit can delay a certain time after turning off the lamp, and then automatically turns off the lamp, so that the lighting in a short time is provided when people leave, and the normal lighting is provided when the ordinary switch is turned on, and the energy storage can be charged. The utility model has the characteristics of simple structure, it is with low costs, chargeable, can prevent the overcharge, can prevent the overdischarge, can prevent excessive pressure, delay time adjustable.

Preferably, the rectifying and filtering circuit of the time delay turn-off circuit comprises a rectifying bridge DB1, pin 1 of the rectifying bridge DB1 is connected with the live wire L and is also connected with one end of a capacitor C11, pin 3 is connected with the neutral wire N and is also connected with the other end of a capacitor C11, pin 2 is connected with the switch conversion circuit (2) through an inductor L21 and is also connected with one end of a capacitor C21 through an inductor L21, the other end of the inductor L21 is grounded through a capacitor C21 and is also connected with one end of an inductor LS21 through a capacitor C21, the inductor L21 is connected in parallel with a resistor RS21, and pin 4 is grounded through an inductor LS21 and is also connected with the other end of a capacitor C21 through an inductor LS 21. The rectification filter circuit converts alternating current into direct current with stable voltage, and the delay turn-off circuit does not interfere with a power grid.

Preferably, the switch conversion circuit of the time delay turn-off circuit comprises a chip US31, the model of the chip US31 is KP1061C, a pin 1 of the chip US31 is connected with a primary winding L41B through a capacitor CS32 and is grounded through a capacitor CS32, the pin 1 is connected with a pin 8 through a capacitor CS33 and a resistor RS35, a pin 2 is connected with a ground and is connected with a pin 4 through a resistor RS32, the pin 3 is grounded through a capacitor CS31, the pin 4 is connected with a capacitor CD31 through a resistor RS33 and a resistor RS34, a pin 5 and a pin 6 are connected with an inductor L21 and are grounded through a capacitor C21, the pin 8 is grounded through a resistor RS31A, the resistor RS31B is connected in parallel with a resistor RS31A, and the pin 8 is connected with the cathode of a diode DS31 and is connected with the other end of the capacitor CD31 through a diode DS 31. The switch conversion circuit converts the electric signal into a high-frequency electric signal through a switch, reduces an output rectifying and filtering element and provides constant current for a load.

Preferably, the output circuit of the time-delay turn-off circuit comprises a capacitor CD31, one end of the capacitor CD31 is connected with the primary winding L41B and the main lighting LED string respectively, the other end of the capacitor CD31 is grounded, and the resistor RS36 is connected with the capacitor CD31 in parallel. The switch conversion circuit is electrically connected with the main lighting LED lamp string through the output circuit.

Preferably, the auxiliary transformer of the time delay shutdown circuit comprises a primary winding L41B, one end of the primary winding L41B is connected with a pin 4 of a KP1061C chip US31 through a resistor RS34 and a resistor RS33, the other end of the primary winding L41B is grounded, one end of a secondary winding L41A is connected with the anode of a diode DS41 and is connected with a capacitor CD42 through a diode DS41, the other end of the secondary winding L41A is grounded and is connected with the other end of the capacitor CD42, a resistor R1 and a capacitor CS41 are connected in series and then connected in parallel with a diode DS41, a resistor R2 is connected in parallel with the capacitor CD42, and the auxiliary transformer is connected with a charging circuit through a resistor R5 and a resistor R5A. The output circuit is electrically connected with the charging circuit through an auxiliary transformer, and the auxiliary transformer provides stable voltage for the charging circuit.

Preferably, the charging circuit of the time-delay turn-off circuit comprises a chip US51, the model number of the chip US51 is SP1693, a pin 1 of the chip US51 is connected with the negative electrode of a diode DS51 and is grounded through a capacitor CS51, a pin 2 is connected with an auxiliary transformer and is connected with the negative electrode of a voltage regulator tube ZD51, the positive electrode of the voltage regulator tube ZD51 is grounded, a pin 3 and a pin 8 are connected with the switching state detection circuit, a pin 4 and a pin 5 are connected with the power storage circuit, a pin 7 is connected with the time-delay lighting LED lamp string, and a pin 9 is grounded. The voltage regulator tube ZD51 is used for preventing the voltage fluctuation of the auxiliary winding and ensuring that the voltage of the SP1693 chip US51 in the charging circuit does not exceed the rated voltage; the SP1693 chip US51 has functions of overvoltage charging protection, overvoltage discharging protection and overcurrent discharging protection; the charging circuit charges a capacitor in the power storage circuit when the switch is closed and provides a protective effect.

Preferably, the switch state detection circuit of the time delay shutdown circuit comprises a live wire L, the live wire L is connected with the anode of the diode DS51 through a resistor RS51 and a resistor RS52 and is connected with a pin 8 of an SP1693 chip US51 through a resistor RS51 and a resistor RS52, the pin 8 is grounded through a capacitor CS52, and a neutral wire N is connected with a pin 3 of the SP1693 chip US51 through a resistor RS53 and a resistor RS 54; the power storage circuit comprises a SP1693 chip US51 pin 4 and pin 5 which are connected with a capacitor CD53, a capacitor CD53 is connected with a capacitor CD51 and a capacitor CD52 in parallel, and a capacitor CD51 is connected with a switch K. When the main circuit switch is closed to work, an electric signal on the switch state detection circuit is transmitted to the charging circuit, a capacitor in the electric storage circuit is charged through the SP1693 chip US51 to store electric quantity, and when the main circuit switch is switched off, the capacitor in the electric storage circuit is controlled to discharge through the SP1693 chip US51 to light the delayed illumination LED lamp string; the delay time is adjusted by changing the number of the parallel capacitors through a switch K.

The utility model has the advantages that: when the main circuit switch is switched on and works, the rectifying and filtering circuit converts alternating current into direct current with stable voltage, the switch conversion circuit is electrically connected with the main lighting LED lamp string through the output circuit to provide constant current for the main lighting LED lamp string, the auxiliary transformer generates stable voltage for the charging circuit, the capacitor in the electric storage circuit is charged and stored with electric quantity through the SP1693 chip US51, the quantity of parallel capacitors is changed through the switch K to adjust time delay duration, when the main circuit switch is switched off, the switch state detection circuit transmits signals to the charging circuit, the main lighting LED lamp string is switched off when the switch is switched off, the time delay lighting LED lamp string is switched on, and the time delay lighting LED lamp string is switched off after a certain time delay. The delay turn-off circuit is simple in structure, low in cost, high in controllability, adjustable in delay time, flexible and easy to use, capable of meeting the use requirements under various scenes, and capable of making different turn-off requirements according to different environments.

Drawings

Fig. 1 is a schematic block diagram of the present invention.

Fig. 2 is a circuit diagram of the rectifier filter circuit, the switch converting circuit, the output circuit and the auxiliary transformer of the present invention.

Fig. 3 is a circuit diagram of a charging circuit, a switch state detection circuit and a power storage circuit according to the present invention.

In the figure, 1, a rectifying filter circuit, 2, a switching conversion circuit, 3, an output circuit, 4, a main lighting LED lamp string, 5, an auxiliary transformer, 6, a charging circuit, 7, a switching state detection circuit, 8, an electric storage circuit and 9, a time-delay lighting LED lamp string are shown.

Detailed Description

The technical solution of the present invention is further specifically described below by way of embodiments and with reference to the accompanying drawings.

The embodiment shown in fig. 1 is a time-delay turn-off circuit, which includes a rectifying and filtering circuit 1, a switching circuit 2, an output circuit 3 and a main lighting LED lamp string 4, which are electrically connected in sequence, wherein the output circuit 3 is electrically connected with an auxiliary transformer 5, a charging circuit 6 and an electric storage circuit 8 in sequence, and a switching state detection circuit 7 is electrically connected with the charging circuit 6 and the time-delay lighting LED lamp string 9 in sequence.

As shown in fig. 2, the rectifying and filtering circuit 1 includes a rectifying bridge DB1, a pin 1 of the rectifying bridge DB1 is connected to one end of a capacitor C11 while being connected to a live line L, a pin 3 is connected to a zero line N while being connected to the other end of the capacitor C11, the pin 2 is connected to a switch conversion circuit 2 via an inductor L21 while being connected to one end of a capacitor C21 via an inductor L21, the other end of the inductor L21 is connected to ground via the capacitor C21 while being connected to one end of an inductor LS21 via a capacitor C21, the inductor L21 is connected to a resistor RS21 in parallel, and the pin 4 is connected to ground via an inductor LS21 while being connected to the other end of a capacitor C21 via an inductor LS 21; the switch conversion circuit 2 comprises a chip US31, the model of the chip US31 is KP1061C, a pin 1 of the chip US31 is connected with a primary winding L41B through a capacitor CS32 and is grounded through a capacitor CS32, the pin 1 is connected with a pin 8 through a capacitor CS33 and a resistor RS35, a pin 2 is connected with a pin 4 through a resistor RS32 and is grounded, a pin 3 is grounded through a capacitor CS31, the pin 4 is connected with a capacitor CD31 through a resistor RS33 and a resistor RS34, the pin 5 and the pin 6 are connected with an inductor L21 and are grounded through a capacitor C21, the pin 8 is grounded through a resistor RS31A, the resistor RS31B is connected with a resistor RS31A in parallel, and the pin 8 is connected with the cathode of a diode DS31 and is connected with the other end of the capacitor CD31 through a diode DS 31; the output circuit 3 comprises a capacitor CD31, one end of the capacitor CD31 is respectively connected with the primary side winding L41B and the main lighting LED lamp string 4, the other end of the capacitor CD31 is grounded, and a resistor RS36 is connected with a capacitor CD31 in parallel; the auxiliary transformer 5 comprises a primary winding L41B, one end of the primary winding L41B is connected with a pin 4 of a KP1061C chip US31 through a resistor RS34 and a resistor RS33, the other end of the primary winding L41B is grounded, one end of a secondary winding L41A is connected with the anode of a diode DS41 and is connected with a capacitor CD42 through a diode DS41, the other end of the secondary winding L41A is connected with the other end of the capacitor CD42 while being grounded, a resistor R1 and a capacitor CS41 are connected in series and then connected in parallel with the diode DS41, a resistor R2 is connected in parallel with the capacitor CD42, and the auxiliary transformer 5 is connected with the charging circuit 6 through a resistor R5 and a resistor R5A.

As shown in fig. 3, the charging circuit 6 includes a chip US51, the model number of the chip US51 is SP1693, pin 1 of the chip US51 is connected with the negative electrode of a diode DS51 and is grounded through a capacitor CS51, pin 2 is connected with an auxiliary transformer 5 and is connected with the negative electrode of a voltage regulator tube ZD51, the positive electrode of the voltage regulator tube ZD51 is grounded, pin 3 and pin 8 are connected with a switch state detection circuit 7, pin 4 and pin 5 are connected with an electric storage circuit 8, pin 7 is connected with a time-delay lighting LED lamp string 9, and pin 9 is grounded; the switch state detection circuit 7 comprises a live wire L, the live wire L is connected with the anode of a diode DS51 through a resistor RS51 and a resistor RS52 and is connected with a pin 8 of an SP1693 chip US51 through a resistor RS51 and a resistor RS52, the pin 8 is grounded through a capacitor CS52, and a zero line N is connected with a pin 3 of the SP1693 chip US51 through a resistor RS53 and a resistor RS 54; the electric power storage circuit 8 comprises an SP1693 chip US51 pin 4 and pin 5 which are connected with a capacitor CD53, the capacitor CD53 is respectively connected with a capacitor CD51 and a capacitor CD52 in parallel, and the capacitor CD51 is connected with a switch K.

The working principle of the utility model is as follows: the rectification filter circuit 1 converts alternating current into direct current with stable voltage, and the delay turn-off circuit does not interfere with a power grid; the switch conversion circuit 2 converts the electric signal into a high-frequency electric signal, reduces an output rectifying and filtering element, and provides constant current for the main lighting LED lamp string 4 through the output circuit 3; the auxiliary transformer 5 provides stable voltage for the charging circuit 6, the capacitors in the electric storage circuit 8 are charged and stored with electric quantity through the SP1693 chip US51, the delay time can be adjusted by changing the number of the capacitors through the switch K in the electric storage circuit 8, and the SP1693 chip US51 has the functions of overvoltage charging protection, overvoltage discharging protection and overcurrent discharging protection; when the switch is detected to be turned off, the switch state detection circuit 7 transmits a signal to the charging circuit 6, so that the main lighting LED lamp string 4 is turned off, the delay lighting LED lamp string 9 is turned on, and the delay lighting LED lamp string 9 is turned off after a certain time delay. The time-delay turn-off circuit can delay a certain time after turning off the lamp, and then automatically turns off the lamp, so that the lighting in a short time is provided when people leave, and the normal lighting is provided when the ordinary switch is turned on, and the energy storage can be charged.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms connected, charged, stored, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a time delay turn-off circuit, characterized by, including rectifier filter circuit (1), switch converting circuit (2), output circuit (3) and the main illumination LED lamp cluster (4) that connect gradually the electricity, output circuit (3) are connected with auxiliary transformer (5), charging circuit (6) and electric power storage circuit (8) electricity in proper order, and on-off state detection circuitry (7) are connected with charging circuit (6) and time delay illumination LED lamp cluster (9) electricity in proper order.

2. The time delay shutdown circuit of claim 1, wherein the rectifier filter circuit (1) comprises a rectifier bridge DB1, pin 1 of the rectifier bridge DB1 is connected to the live line L and to one end of a capacitor C11, pin 3 is connected to the neutral line N and to the other end of a capacitor C11, pin 2 is connected to the switch switching circuit (2) via an inductor L21 and to one end of a capacitor C21 via an inductor L21, the other end of the inductor L21 is connected to one end of an inductor LS21 via a capacitor C21 while being grounded via a capacitor C21, inductor L21 is connected to a resistor RS21 in parallel, and pin 4 is connected to the other end of the capacitor C21 via an inductor LS21 while being grounded via an inductor LS 21.

3. The time delay shutdown circuit of claim 1 or 2, characterized in that the switch conversion circuit (2) comprises a chip US31, the model of the chip US31 is KP1061C, a pin 1 of the chip US31 is connected with a primary winding L41B through a capacitor CS32 and is grounded through a capacitor CS32, the pin 1 is connected with a pin 8 through a capacitor CS33 and a resistor RS35, the pin 2 is grounded and is connected with a pin 4 through a resistor RS32, the pin 3 is grounded through a capacitor CS31, the pin 4 is connected with a capacitor CD31 through a resistor RS33 and a resistor RS34, the pin 5 and the pin 6 are connected with an inductor L21 and are grounded through a capacitor C21, the pin 8 is grounded through a resistor RS31A, the resistor RS31B is connected in parallel with a resistor RS31A, and the pin 8 is connected with the cathode of a diode DS31 and is connected with the other end of the capacitor CD31 through a diode DS 31.

4. The time-delay turn-off circuit of claim 1, wherein the output circuit (3) comprises a capacitor CD31, one end of the capacitor CD31 is connected with the primary winding L41B and the main lighting LED string (4), the other end of the capacitor CD31 is grounded, and the resistor RS36 is connected with the capacitor CD31 in parallel.

5. The time-delay turn-off circuit of claim 1, wherein the auxiliary transformer (5) comprises a primary winding L41B, one end of the primary winding L41B is connected to pin 4 of the KP1061C chip US31 through a resistor RS34 and a resistor RS33, the other end of the primary winding L41B is grounded, one end of a secondary winding L41A is connected to the positive electrode of a diode DS41 and is connected to the capacitor CD42 through a diode DS41, the other end of the secondary winding L41A is connected to the ground and is connected to the other end of the capacitor CD42, a resistor R1 and a capacitor CS41 are connected in series and then are connected in parallel to the diode DS41, a resistor R2 is connected in parallel to the capacitor CD42, and the auxiliary transformer (5) is connected to the charging circuit (6) through a resistor R5 and a resistor R5A.

6. The time-delay turn-off circuit of claim 1 or 5, characterized in that the charging circuit (6) comprises a chip US51, the model number of the chip US51 is SP1693, a pin 1 of the chip US51 is connected with the cathode of a diode DS51 and is grounded through a capacitor CS51, a pin 2 is connected with an auxiliary transformer (5) and is connected with the cathode of a voltage regulator tube ZD51, the anode of the voltage regulator tube ZD51 is grounded, a pin 3 and a pin 8 are connected with the on-off state detection circuit (7), a pin 4 and a pin 5 are connected with the storage circuit (8), a pin 7 is connected with the time-delay lighting LED lamp string (9), and a pin 9 is grounded.

7. The time-delay turn-off circuit of claim 6, wherein the switch state detection circuit (7) comprises a live wire L, the live wire L is connected with the positive electrode of the diode DS51 through a resistor RS51 and a resistor RS52 and is connected with a pin 8 of an SP1693 chip US51 through a resistor RS51 and a resistor RS52, the pin 8 is grounded through a capacitor CS52, and a neutral wire N is connected with a pin 3 of an SP1693 chip US51 through a resistor RS53 and a resistor RS 54; the electric power storage circuit (8) comprises a SP1693 chip US51 pin 4 and pin 5 which are connected with a capacitor CD53, a capacitor CD53 is connected with a capacitor CD51 and a capacitor CD52 in parallel, and a capacitor CD51 is connected with a switch K.