CN203119217U - A fault-arc temperature detecting plug/socket - Google Patents

Abstract

The utility model belongs to household electrical appliance plug/socket field and especially relates to a fault-arc temperature detecting plug/socket. The fault-arc temperature detecting plug/socket comprises a plug/socket main circuit. The plug/socket main circuit is connected with a fault arc detecting module and a switching power supply unit. The switching power supply unit supplies power for a central processing unit connected with a temperature detecting unit, a tripping unit, and an acousto-optic alarm unit. The temperature detecting unit is mounted on a pin or a contact sheet. The fault-arc temperature detecting plug/socket is capable of cutting off a rear-end circuit and effectively detects electrical fire of the rear end of a wiring board and has an disconnection and isolation function on the electrical fire, wherein the electrical fire is caused by virtual short circuit or virtual open circuit. Therefore, electrical fires caused by fault arc can be prevented in advance. The fault-arc temperature detecting plug/socket is also equipped with the temperature detecting unit and the acousto-optic alarm unit, so security is further increased.

Description

Fault arc temperature detection plug/socket

technical field

The utility model belongs to the field of household appliance plugs/sockets, in particular to a fault arc type temperature detection plug/socket.

Background technique

At present, the plugs/sockets of household appliances used in the market are mainly divided into two categories. One is the ordinary plug/socket without protection function. This kind of plug/socket is only for connection and does not effectively protect the back-end circuit , when there is a circuit fault that causes a fire, it cannot be protected in time, which poses a threat to the safety of people's lives and property; the other type is a protective plug/socket with a protective function. , residual current protection, but there is no effective detection method for the fault arc caused by the virtual short circuit and virtual break in the back-end circuit, and the fire caused by the fault arc seriously threatens the safety of people's lives and property.

Utility model content

The utility model provides a plug/socket capable of timely and effectively protecting back-end household appliances in the electrical plug/socket field, capable of detecting fault arcs, and having a temperature detection and alarming plug/socket.

In order to achieve the purpose of the above invention, the utility model adopts the following technical means: the fault arc type temperature detection plug/socket includes the main circuit of the plug/socket, and the main circuit of the plug/socket is connected with a fault arc detection module and a switching power supply unit; The switching power supply unit supplies power to the central processing unit; the central processing unit is also connected with a temperature detection unit, a tripping unit and an audible and visual alarm unit; the temperature detection unit is installed on a pin or a contact piece.

As a preferred solution: the arc fault detection module includes a high frequency signal sampling unit, a signal processing unit, a power zero point acquisition unit and an arc fault analysis unit. the

As a preferred solution: the tripping unit includes a high-voltage bidirectional optocoupler, a thyristor, a tripping coil and a filter circuit.

As a preferred solution: the temperature detection unit is a thermistor.

As an optimal solution: the central processing unit is also connected with an audible and visual alarm unit.

The beneficial effect of the utility model is that: since the fault arc type temperature detection plug/socket is equipped with a fault arc analysis unit and a trip unit, it can detect the arc existing in the back-end line, and can distinguish the type of arc, which is general arc, good If an arc fault is detected, the central processing unit will issue a command to control the trip unit to disconnect the back-end circuit, so as to prevent an electrical fire caused by a virtual short or a virtual break at the rear end of the patch panel. To effectively detect and disconnect the isolation function, so that the electrical fire caused by the fault arc can be prevented before it happens. Because the fault arc type temperature detection plug/socket is also equipped with a temperature detection unit and an audible and visual alarm unit, it can detect whether the temperature meets the standard, and trigger the trip unit when it exceeds the standard, and disconnect the back-end circuit. The sound and light alarm unit can send out an alarm when the back-end circuit is disconnected, attracting people's attention and further increasing safety.

Description of drawings

Fig. 1 is the circuit principle block diagram of the utility model patent fault arc type temperature detection plug/socket.

Fig. 2 is the circuit diagram of the temperature detection part of the utility model patent fault arc type temperature detection plug/socket.

Fig. 3 is a schematic diagram of the tripping unit of the utility model patent fault arc type temperature detection plug/socket.

Detailed ways

The following is a detailed description of the preferred implementation of the fault arc type temperature detection plug/socket of the present invention in conjunction with the accompanying drawings:

The arc fault temperature detection plug/socket as shown in Figure 1 includes a fault arc detection module 1 connected in the load line and capable of identifying the fault arc; Central processing unit i; a switching power supply unit g that supplies power to central processing unit i; an audible and visual alarm unit e that can provide on-site instructions, and the audible and visual alarm unit e is connected to central processing unit i; a power supply unit that can cut off the back-end power circuit The tripping mechanism f is connected with the central processing unit i. A temperature detection unit h capable of detecting the temperature of pins or contacts, and the temperature detection unit h transmits the detected temperature signal to the central processing unit i. All the units and modules mentioned above are hardware devices.

As shown in Figure 1, the arc fault detection module 1 includes: a high-frequency signal sampling unit a for collecting arc signals in the load line; a signal processing unit b for filtering the output signal of the high-frequency signal sampling unit; A power supply zero point collection unit d for collecting the power supply zero point in the load line; a fault arc analysis unit c capable of identifying fault arcs according to the output signals of the signal processing unit and the power supply zero point collection unit, the output end of the fault arc analysis unit c is connected to the central processing unit i. The high-frequency signal sampling unit a collects the arc signal in the load line through the high-frequency sampling coil; the high-frequency sampling coil transmits the collected arc signal to the signal processing unit b, and the signal processing unit b processes the signal internally, and the processed The signal of the fault arc is transmitted to the fault arc analysis unit c, and the fault arc processing unit c collects the power zero point in the load line through the power zero point acquisition unit d, and analyzes and judges the above signals through the internal program to detect whether there is a fault that can cause a fire in the circuit arc. After the fault arc analysis unit judges the arc signal, it gives a load line state judgment signal, and transmits the load line state judgment signal to the central processing unit i, and the central processing unit i according to the judgment signal given by the fault arc analysis unit c, Analyze and judge the line condition, then transmit the information to the sound and light alarm unit e, and control the tripping unit f, if the central processing unit i detects a fault arc, it will notify the sound and light alarm unit e to issue a sound and light alarm, and the alarm state remains until Manually reset the circuit, and control the trip unit f to trip, and cut off the power output of the temperature detection plug/socket back-end circuit.

As shown in Figure 1, the temperature detection unit h transmits the temperature information to the central processing unit i by detecting the temperature of the pin or the contact piece, and the central processing unit i analyzes the temperature information. When the detected temperature exceeds the predetermined fire protection When the warning value is reached, the central processing unit i will notify the audible and visual alarm unit e to issue an audible and visual alarm, and the alarm state will remain until the circuit is manually reset, and the tripping unit f will be controlled to trip, cutting off the power supply of the back-end circuit of the temperature detection plug/socket output.

As shown in Figure 2, the tripping unit circuit f in the figure receives the tripping signal sent by the central processing unit i through the tripping part in the figure, and transmits the signal to the high-voltage bidirectional optocoupler U1 through the load circuit, and the high-voltage bidirectional optocoupler After U1 receives the tripping signal, pins 4 and 6 are turned on, controlling the thyristor SCR1 to close, and the resistance connected to the high-voltage bidirectional optocoupler U1 is a load resistor, which acts as a voltage divider, and the filter circuit stabilizes the control of the thyristor SCR1 The level signal is stable, and after the thyristor SCR1 is turned on, it will trigger the conduction of the positive pole and the negative pole, which will cause the tripping coil connected between the positive pole and the negative pole to be energized, and trigger the circuit to trip.

As shown in Figure 3, the temperature detection unit h detects the temperature of the pin or the contact piece through the thermistor. When the pin or the contact changes, the resistance of the thermistor will change. The connected resistors divide the voltage, and then transmit the changing voltage signal to the central processing unit i through T1 and T2, analyze the signal, and judge whether the temperature has reached the tripping state.

Claims (5)

1. fault electric arc formula temperature inspection plug is characterized in that: comprise the plug main circuit, be connected to fault electric arc detection module and switching power supply in the described plug main circuit; Described switching power supply is the CPU power supply; Described CPU also is connected with temperature detecting unit, trip unit and acousto-optic warning unit; Described temperature detecting unit is installed on pin or the contact.

2. fault electric arc formula temperature according to claim 1 is examined plug, and it is characterized in that: described fault electric arc detection module comprises high-frequency signal sampling unit, signal processing unit, power supply collecting unit at zero point and fault electric arc analytic unit.

3. fault electric arc formula temperature according to claim 1 is examined plug, and it is characterized in that: described trip unit comprises high-voltage bidirectional optocoupler, controllable silicon, tripping coil and filter circuit.

4. fault electric arc formula temperature according to claim 1 is examined plug, and it is characterized in that: described temperature detecting unit is thermistor.

5. fault electric arc formula temperature according to claim 1 is examined plug, and it is characterized in that: CPU also is connected with acousto-optic warning unit.

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