CN201927991U - Wireless warning device of electrical leakage protector - Google Patents

Abstract

The utility model relates to the field of leakage protection equipment, in particular to a wireless alarm device for a leakage protector, which includes a leakage collection control circuit, a single-chip microcomputer control circuit, a display circuit, a keyboard circuit, an alarm circuit, a telephone dial circuit, and a power-off driving circuit. The leakage signal detected by the leakage collection control circuit is transmitted to the single-chip microcomputer control circuit, the single-chip microcomputer control circuit pushes the power-off drive circuit to trip the circuit breaker, and the single-chip microcomputer control circuit inputs the signal into the telephone dial-up circuit to dial a designated phone, and drives the alarm circuit Make a sound, when the leakage protector wireless alarm device detects the leakage signal, it will promptly notify professionals to eliminate the fault through wireless alarm, eliminate potential safety hazards, and avoid inconvenience to people's work and life due to power outages. Stable, automatic dial reminder, high practical value.

Description

Leakage protector wireless alarm device

technical field

The utility model relates to the field of electric leakage protection equipment, in particular to a wireless alarm device for an electric leakage protector.

Background technique

According to the safety requirements of household appliances, daily household appliances such as washing machines, refrigerators, electric irons, and electric water heaters must use three-pin plugs and sockets with special grounding protection lines. However, ordinary residential buildings in China do not consider grounding facilities. There is no grounding protection line in the power distribution box. Once the electrical leakage occurs and the shell is touched, an electric shock accident will inevitably occur and endanger personal safety. Therefore, a leakage protector is generally installed in the distribution box cabinet to prevent personal safety and electrical fire protection. However, most of the leakage protectors are locked. Once the power is cut off after tripping, it is necessary to notify a professional to open it, and to close the switch after the fault is removed, but this often takes a long time.

Utility model content

In order to overcome the potential safety hazards in the use of existing home appliances, the utility model provides a wireless alarm device for leakage protectors. When the leakage signal is detected, the wireless alarm will promptly notify professionals to eliminate the faults, eliminate potential safety hazards, and avoid power outages. Bring inconvenience to people's work and life.

The technical solution adopted by the utility model to solve the technical problem is: leakage protector wireless alarm device, including leakage collection control circuit, single-chip microcomputer control circuit, display circuit, keyboard circuit, alarm circuit, telephone dialing circuit, power-off drive circuit, the The leakage signal detected by the leakage collection control circuit is transmitted to the single-chip microcomputer control circuit, the single-chip microcomputer control circuit pushes the power-off drive circuit to trip the circuit breaker, and the single-chip microcomputer control circuit inputs the signal into the telephone dial-up circuit to dial a designated phone, and drives the alarm circuit Make a noise.

The single-chip microcomputer control circuit is connected to the keyboard circuit, and a designated telephone number is preset.

After the leakage signal detected by the leakage collection control circuit is amplified and rectified by the operational amplifier, the voltage is compared.

By adopting the aforementioned technical scheme, the beneficial effect of the utility model is: when the leakage protector wireless alarm device detects the leakage signal, it will promptly notify the professionals to eliminate the fault through the wireless alarm, eliminate potential safety hazards, and avoid causing power outages to people. Work and life bring inconvenience, low cost, stable performance, automatic dial reminder, and high practical value.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is a schematic circuit diagram of the utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1 and Figure 2, the leakage protector wireless alarm device of the present invention includes a leakage collection control circuit 1, a single-chip microcomputer control circuit 2, a display circuit 3, a keyboard circuit 4, an alarm circuit 5, a telephone dial circuit 6, a Electric drive circuit 7, the leakage signal detected by the leakage acquisition control circuit 1 is transmitted to the single-chip control circuit 2, the single-chip control circuit 2 promotes the power-off drive circuit 7 to trip the circuit breaker, and the single-chip control circuit 2 inputs the signal to the phone The dialing circuit 6 dials a designated telephone number, and drives the alarm circuit 5 to sound.

Leakage collection control circuit 1 is composed of sensor L1, resistor R1, resistor R2, diode D1, diode D2, and capacitor C1. Sensor L1 is a residual current sensor. When three-phase four-wire passes through sensor L1, the zero-sequence current is zero. When there is a ground fault in any phase of the phase, that is, when the live wire is leaking to the ground, the sensor L1 vector sum is no longer equal to zero. During normal power supply, the current is equal in magnitude and opposite in direction. When there is a phase wire grounded, the direction is opposite and the current is in the same phase. The secondary side of the sensor L1 generates a small induced voltage signal. After the signal is connected to the operational amplifier U3/A and amplified, it is rectified by the diode D3 and limited by the resistor R6, and connected to the sixth pin of the operational amplifier U3/B. A voltage comparator composed of R8, resistor R10, and operational amplifier U3/B. The 6th pin and 5th pin of the operational amplifier U3/B compare high and low levels. When the potential of the 6th terminal of the operational amplifier U3/B is higher than that of the 5th pin Potential, the 7th pin outputs a high level, the signal is connected to the 23rd end of the single-chip control circuit module U1, the value is set by the internal program of the single-chip control circuit module U1, and the U5 is driven to display leakage data information.

When the leakage signal detected by the residual current sensor L1 is amplified and rectified by the operational amplifier, the voltage is compared, and if it exceeds the set voltage value, it is connected to the 23rd terminal of the single-chip control circuit module U1. At this time, the single-chip control circuit module U1 is judged and controlled by the internal program. It is divided into three outputs respectively. The first single-chip microcomputer control circuit module U1's 10th terminal outputs a low potential to push the relay J1 to pull in and drive the circuit breaker to trip. The second single-chip microcomputer control circuit module U1's 13th and 14th output data signals respectively Connect to the 5th and 6th terminals of the telephone dialing module U4, transmit data control, push the 7th terminal of the telephone dialing 6 module U4 to output a low potential to turn on the triode Q1, send level signals through the diodes D1, D2, D3, D4, and use the keyboard The preset telephone number of the circuit 4 dials the specified telephone number, and the 29th terminal of the third single-chip microcomputer control circuit module U1 outputs a low level through the resistor 2R9 to make the speaker Y sound.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above-mentioned embodiments. The principle of the utility model, under the premise of not departing from the spirit and scope of the utility model, the utility model also has various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed for protection, and the utility model claims protection scope as defined by the appended claims and their equivalents.

Claims (3)

1. Leakage protector wireless alarm device, characterized in that: including leakage acquisition control circuit (1), single-chip microcomputer control circuit (2), display circuit (3), keyboard circuit (4), alarm circuit (5), telephone dialing circuit (6), power-off drive circuit (7), the leakage signal detected by the leakage acquisition control circuit (1) is transmitted to the single-chip control circuit (2), and the single-chip control circuit (2) promotes the power-off drive circuit (7) to make the circuit breaker device tripping, the single-chip microcomputer control circuit (2) inputs the signal to the telephone dialing circuit (6) to dial the designated telephone number, and drives the alarm circuit (5) to sound. 2. The leakage protector wireless alarm device according to claim 1, characterized in that: the single-chip microcomputer control circuit (2) is connected to a keyboard circuit (4), and a designated telephone number is preset. 3. The leakage protector wireless alarm device according to claim 1, characterized in that: the leakage signal detected by the leakage collection control circuit (1) is amplified and rectified by an operational amplifier, and then voltage comparison is performed. the

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