CN218450076U - Circuit for automatically closing power switch in power failure - Google Patents

Abstract

The utility model discloses a power failure self-closing switch's circuit, this circuit adopt a double-pole single-throw relay that accords with safety standard to replace the double-pole single-throw switch contact, plus a logic discernment and control circuit, design two and normally open the light touch switch, the function of a servo switch-on, a servo turn-off function, constitute a power failure self-closing switch circuit so. When the function key is touched once, the logic identification and control circuit has a self-locking function to keep the main switch in the on state. After the one-time function-off key is touched, the main switch is disconnected and is kept in a turn-off state. The power-off switch has one more function than a mechanical switch, and when the main switch is powered off after being switched on, the main switch can automatically switch from the on state to the off state, so that unnecessary electric energy waste caused by forgetting to switch off the power switch after power failure is avoided, and unnecessary service life loss of an electric appliance is reduced.

Description

Circuit for automatically closing power switch in power failure

Technical Field

The utility model relates to a switch, specific saying so relates to a circuit that has a power failure self-closing switch.

Background

In the strong current electric appliance market and products, generally we can install a switch on the power supply line in front of the electric appliance power line plug, and the electric appliance product designer also can design a switch on the electric appliance body, so that the operation and the stop of the electric appliance are controlled when the electric appliance is convenient for consumers to use.

In practical use, an electrical appliance in operation can meet the condition of power failure, sometimes the power failure is not in a half of a time, the switch can be forgotten to be turned off before the power is supplied, or the electrical appliance leaves the use area of the electrical appliance during the power failure, so that the electrical appliance does not need to be used and continues to operate after the power is supplied, the electric energy is wasted, and the service life of the electrical appliance is reduced.

The switch panel on the market at present only has simple on-off functions, and when the switch is closed, the electric appliance operates, and when the switch is opened, the electric appliance stops. When the running electric appliance is powered on again after power failure, the switch has no function of automatically turning off the electric appliance, and can not well save electric energy and reduce unnecessary service life loss of the electric appliance in many application scenes.

In the prior art, a common power switch generally uses a switch panel, and a double-pole single-throw switch panel is provided, and the common power switch is also called a one-switch double-control switch panel in the market. The circuit diagram of the switch is marked with the symbol S, and when the user presses down according to the on indication position, the 2 pairs of metal contact pieces inside the switch panel are connected. As shown in fig. 1, the contact 1 and the contact 2 are a pair, and the contact 3 and the contact 4 are a pair. In the lighting circuit, a pair of control live wires and a pair of control zero wires. As shown in fig. 2, when the switch key is pressed, the 1-2 contact is connected, the 3-4 contact is also connected, the LAMP is connected with the 220VAC 50Hz power supply, and the bulb shines; otherwise, the switch key is bounced, the 1-2 contact is disconnected, the 3-4 contact is also disconnected, the LAMP is disconnected with the 220VAC 50Hz power supply, and the LAMP bulb is turned off.

Based on the consideration of the above technical problems, a power-off automatic power switch is designed, so that the user does not have the trouble of forgetting to turn off the power switch when power is off.

SUMMERY OF THE UTILITY MODEL

To the not enough among the prior art, the to-be-solved technical problem of the utility model lies in providing a power failure self-closing switch's circuit, and the purpose of designing this circuit is after having a power failure, when coming the call once more, and load circuit can automatic disconnection.

In order to solve the technical problem, the utility model discloses a following scheme realizes: the utility model discloses a power failure self-closing switch's circuit, include:

the touch control part is provided with two touch control switches which are respectively a normally open tact switch S1 and a normally closed tact switch S2, and a pin 1 of the normally open tact switch S1 is connected to an L line;

intelligent recognition and control portion, including resistance R1, electric capacity C1, have polarity electric capacity C2, diode D1, diode D2, zener diode D3 and a relay K1, resistance R1 with both ends behind the parallel circuit are connected to normally open 2 feet, diode D1 ' S negative pole, diode D2 ' S positive pole of dabbing switch S1 respectively to electric capacity C1, diode D1 ' S positive pole with diode D2 ' S negative pole is connected, polarity electric capacity C2 ' S negative pole inserts the N line, its positive terminal connects to diode D1 ' S positive pole, zener diode D3 ' S positive pole inserts the N line, its negative pole end connects to diode D2 ' S negative pole, zener diode D3 ' S negative pole still is connected to normally closed dabbing switch S2 ' S2 feet, relay K1 ' S5 feet with be the coil contact between relay K1 ' S6 feet, relay K1 ' S5 feet connect to normally closed dabbing switch S2 ' S1 foot, its 3 feet and its 6 feet connect the N line, relay K1 ' S1 feet with relay K1 and relay K1 ' S the load K1 ' S the normally open 2 feet that normally closed dabbing the relay K2 is connected to normally open the load K1, relay K4 ' S the relay K1 is normally open the load K2 feet is connected with relay K4 ' S that the relay K1 is connected with the relay K1.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a circuit can make the in service have a power failure with electrical apparatus after, when the automatic shutoff switch in incoming telegram back once more, reduces the electric energy waste and reduces the life-span of electrical apparatus and rolls over the loss.

Drawings

Fig. 1 is a circuit diagram of a prior art double pole single throw switch panel.

Fig. 2 is a circuit diagram of a prior art lamp control switch.

Fig. 3 is a circuit block diagram of the power-off automatic power switch of the present invention.

Fig. 4 is a schematic circuit diagram of the power failure automatic closing power switch of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making more clear and definite definitions of the protection scope of the present invention. It is obvious that the described embodiments of the invention are only some of the embodiments of the invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1: the utility model discloses a concrete structure as follows:

referring to fig. 3-4, the circuit for automatically turning off the power switch in case of power failure of the present invention includes:

the touch control part is provided with two touch control switches which are a normally open tact switch S1 and a normally closed tact switch S2 respectively, and a pin 1 of the normally open tact switch S1 is connected to an L line;

intelligent identification and control portion, including resistance R1, electric capacity C1, have polarity electric capacity C2, diode D1, diode D2, zener diode D3 and a relay K1, resistance R1 with both ends behind the parallel circuit are connected to normally open 2 feet, diode D1 ' S negative pole, diode D2 ' S positive pole respectively after electric capacity C1 constitutes the parallel circuit, diode D1 ' S positive pole with diode D2 ' S negative pole is connected, polarity electric capacity C2 ' S negative pole inserts N line, its positive terminal connects to diode D1 ' S positive pole, zener diode D3 ' S positive pole connects to N line, its negative pole termination to diode D2 ' S negative pole, zener diode D3 ' S negative pole still is connected to normally closed 2 feet that dabs 2, relay K1 ' S5 feet with be the coil contact between relay K1 ' S the 6 feet, relay K1 ' S5 feet connect to normally closed 1 foot that dabs 2, its 3 feet and its 6 feet connect to N line, relay K1 and relay K1 ' S the normally open 2 feet that relay K4 is connected with relay K1 and relay K4 the load switch K1.

Example 2:

as shown in fig. 3, the main components of the touch portion of the present invention include a normally open tact switch S1 and a normally closed tact switch S2; the intelligent identification and control part of the circuit mainly comprises a resistor R1, a capacitor C1, a polar capacitor C2, a diode D1, a diode D2 and a voltage stabilizing diode D3; the main switch is a relay K1.

The following is the concrete working principle of the circuit of the utility model:

1. when the normally-open tact switch S1 is touched, the switch is closed, the alternating current mains supply is in a positive half cycle, the current flows from the L line of the alternating current mains supply to usually open the 1 pin of the tact switch S1 to the 2 pin of the normally-open tact switch S1, then to the 1 pin of the capacitor C1 to the 2 pin of the capacitor C1, then to the 1 pin of the diode D2 to the 2 pin of the diode D2, then to the 1 pin of the polar capacitor C2 to the 2 pin of the polar capacitor C2, then to the N line of the alternating current mains supply, and in the process, the capacitor C1 and the polar capacitor C2 are charged simultaneously;

2. in the negative half cycle of the alternating current mains supply, current flows from an alternating current mains supply N line to a pin 2 of a voltage stabilizing diode D3, then to a pin 2 of a diode D1, then to a pin 1 of the diode D1, then to a pin 2 of a capacitor C1, then to a pin 1 of the capacitor C1, then to a pin 2 of a normally-open tact switch S1, then to a pin 1 of the normally-open tact switch S1, and then to an L line of the alternating current mains supply, and the capacitor C1 discharges in the process; the steps are repeated until the hand touching the normally open tact switch S1 is released.

3. The voltage on the polar capacitor C2 rises from zero, and the electric energy on the polar capacitor C2 starts to flow through the pin 2 of the normally closed tact switch S2 to the pin 1 of the normally closed tact switch S2, then flows through the pin 5 of the coil of the relay K1 to the pin 6 of the coil of the relay K1, and then returns to the pin 2 of the capacitor C2. The last voltage of electric capacity C2 rises, the electric current that flows through relay K1 rises, when this electric current rises to enough relay K1 closure, relay K1 is closed, 2 of relay K1 are closed to normally open contact, exchange the commercial power from L line to relay K1's 1 foot, relay K1's 2 feet, reach load R2 again, reach relay K1's 4 feet, relay K1's 3 feet again, reach the N line of exchanging the commercial power again, form electric loop, load R2 is in the running state.

4. After the relay K1 is closed, the charging and discharging of the capacitor C1 and the charging of the polar capacitor C2 can be completed through the pin 2 of the relay K1, the electric appliance K1 can keep a closed state after the light-touch normally-open light-touch switch S1 is released, and the load R2 continuously operates. From touching normally open dabs switch S1 closed to relay K1 closed, this time can be long or short, and how much time is decided by electric capacity C1, polarized electric capacity C2, relay K1 'S parameter, and general design is in the millisecond level, and it can to guarantee user' S experience.

5. In this circuit, a zener diode D2 connected in parallel to a polar capacitor C2 has 2 functions, i.e., to stabilize the voltage on the capacitor C2 when the voltage is higher; and secondly, a discharging path is provided for the capacitor C1 in the negative half cycle of the alternating current commercial power, so that the positive half cycle of the alternating current commercial power can continuously charge the polar capacitor C2, and the relay K1 is kept closed continuously.

To sum up, the utility model discloses a circuit adopts a double-pole single-throw relay that accords with safety standard to replace double-pole single-throw switch contact, plus a logic discernment and control circuit, designs two and normally opens the light touch switch, and the function of a servo switch-on, a servo turn-off function constitutes a power failure self-closing switch circuit so. When the function key is touched once, the logic identification and control circuit has a self-locking function to keep the main switch in the on state. After the function key is touched once, the main switch is disconnected and kept in the off state. The power-off switch has one more function than a mechanical switch, and when the main switch is powered off after being switched on, the main switch can automatically switch from the on state to the off state, so that unnecessary electric energy waste caused by forgetting to switch off the power switch after power failure is avoided, and unnecessary service life loss of an electric appliance is reduced.

The utility model discloses a circuit can make the in service have a power failure with electrical apparatus after, when the automatic shutoff switch in incoming telegram back once more, reduces the electric energy waste and reduces the life-span of electrical apparatus and rolls over the loss. The utility model discloses the key point is intelligent identification power failure problem, just in time automatic turn-off after having a power failure power switch with electrical apparatus. And the switch needs to be manually closed after the power failure of the common switch panel, and the intelligent identification function is not available.

The above description is only the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all the equivalent structures or equivalent processes that are used in the specification and drawings of the present invention can be directly or indirectly applied to other related technical fields, and all the same principles are included in the scope of the present invention.

Claims (1)

1. A circuit for automatically turning off a power switch in power failure is characterized by comprising:

the touch control part is provided with two touch control switches which are a normally open tact switch S1 and a normally closed tact switch S2 respectively, and a pin 1 of the normally open tact switch S1 is connected to an L line;

intelligent identification and control portion, including resistance R1, electric capacity C1, have polarity electric capacity C2, diode D1, diode D2, zener diode D3 and a relay K1, resistance R1 with both ends behind the parallel circuit are connected to normally open 2 feet, diode D1 ' S negative pole, diode D2 ' S positive pole respectively after electric capacity C1 constitutes the parallel circuit, diode D1 ' S positive pole with diode D2 ' S negative pole is connected, polarity electric capacity C2 ' S negative pole inserts N line, its positive terminal connects to diode D1 ' S positive pole, zener diode D3 ' S positive pole connects to N line, its negative pole termination to diode D2 ' S negative pole, zener diode D3 ' S negative pole still is connected to normally closed 2 feet that dabs 2, relay K1 ' S5 feet with be the coil contact between relay K1 ' S the 6 feet, relay K1 ' S5 feet connect to normally closed 1 foot that dabs 2, its 3 feet and its 6 feet connect to N line, relay K1 and relay K1 ' S the normally open 2 feet that relay K4 is connected with relay K1 and relay K4 the load switch K1.

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