Distribution box state detection device

Abstract

The utility model relates to the technical field of distribution box state detection devices, in particular to a distribution box state detection device, which is characterized in that 220V alternating current enters a distribution box, then is connected to an alternating current contactor and then is connected to an air circuit breaker with leakage protection; one path of output of an alternating current power supply of the air circuit breaker supplies power to a relay electromagnetic coil, a single chip microcomputer and auxiliary modules thereof through a direct current voltage stabilizer, one path of output is connected to input ends of relays, supplies power to all paths through electromagnetic switches and provides an automatic control power supply and a timing control power supply, and one path of output serves as a straight-through power supply for output. A smoke CO sensor, a temperature and humidity sensor and a residual current detector are arranged in the distribution box and output signals to a single-chip microcomputer, and the single-chip microcomputer outputs the signals to all paths of power supply relays, a straight-through power supply and a surge protector. And the surge protector is connected with the alternating current contactor. The device can realize intelligent power distribution, also provides an automatic control power supply, detects the internal state of the distribution box, and can automatically give an alarm.

Description

TECHNICAL FIELD

[0001] The utility model relates to distribution box state detection device technical field especially, one kind is distribution box state detection device. BACKGROUND

[0002] Distribution box is one of important distribution equipment in building. The safe and stable operation of distribution box is directly related to normal production and daily life. According to statistics, the main security risk in the operation of distribution box is electrical fire. Electrical fire has certain particularity, and its main mechanism is as follows: the local part of fault is heated for a long time, leading to further reduction of insulation, eventually leading to line short circuit and causing fire. The current in line increases instantaneously, accumulates heat, and fire occurs due to temperature rise.

[0003] From the above principle, it can be seen that detecting temperature and residual current can early warn the occurrence of electrical fire. At present, part of distribution boxes on the market are equipped with several air circuit breakers, and users manually control the connection and disconnection of each line domestic power supply. This distribution mode is backward, single-function, lacks artificial intelligence, and far cannot meet the needs of modern intelligence. A distribution box state detection device is needed, which can meet the following requirements

[0004] (1) can accurately monitor the internal temperature of distribution box, and protect the residual current value in circuit;

[0005] (2) can continuously send the real-time temperature and residual current value of vacuum circuit breaker to the electrical fire monitoring system of distribution box in a short time;

[0006] (3) can automatically identify abnormal data to alert duty personnel;

[0007] (4) realizes intelligent power distribution, also provides automatic control power supply, and has the safety alarm function of distribution box fire prevention. CONTENT OF UTILITY MODEL

[0008] In order to overcome the existing deficiencies, the utility model provides a kind of distribution box state detection device.

[0009] The utility model discloses a technical scheme that solves its technical problem is adopted: a distribution box state detection device, 220V alternating current enters distribution box and connects the air circuit breaker with the leakage protection in turn after connecting the alternating current contactor, the alternating current source of air circuit breaker one way output passes through the DC stabiliser and gives the relay electromagnetic ring, singlechip and its subsidiary module power supply, one way connects each relay input, and each way power supply is provided for automatic control power supply and timing control power supply through electromagnetic switch, and one way is as straight-through power output, be equipped with smoke CO sensor, temperature and humidity sensor, residual current detector in the distribution box and export signal to singlechip, and singlechip exports signal to each way power supply relay, straight-through power supply and surge protector, the surge protector is connected with the alternating current contactor.

[0010] According to another embodiment of the utility model, further include, the DC stabiliser gives WIFI module, communication module and singlechip power supply.

[0011] According to another embodiment of the utility model, further include, the communication module and mobile phone two-way communication, WIFI module receives mobile phone instruction, the WIFI module, communication module exports signal to singlechip.

[0012] According to another embodiment of the utility model, further include, the smoke CO sensor includes MQ-2 sensor and MQ-7 sensor, the 2 pins of MQ-2 sensor and MQ-7 sensor connect power supply and ground for sensor power supply, DO pin is suspended, and the analog quantity is exported to singlechip through AO pin, and the analog quantity collected is converted into digital quantity through the channel 1 of ADC1 of singlechip.

[0013] According to another embodiment of the utility model, further include, the temperature and humidity sensor selects DHT11 module, and 2 pins connect power supply and ground for sensor power supply, utilize single bus and singlechip to carry out data communication, and the resistance of 5kΩ is connected simultaneously with the driving DATA line.

[0014] According to another embodiment of the utility model, further include, the alternating current A, B, C phase line and N zero line pass through residual current detector simultaneously, and the residual current detector is electrically connected with singlechip.

[0015] The utility model has the advantages of realizing intelligent power distribution, providing automatic control power supply, detecting the internal state of distribution box and automatically alarming. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model is further illustrated below in connection with the drawings and examples.

[0017] Figure 1 It is the structure schematic diagram of the utility model;

[0018] Figure 2 is a circuit diagram of a smoke CO sensor;

[0019] Figure 3 is a circuit diagram of a temperature and humidity sensor;

[0020] Figure 4 is a circuit diagram of a residual current detector. DETAILED DESCRIPTION

[0021] As Figure 1 is a structural schematic view of the utility model, a distribution box state detection device, 220V alternating current enters the distribution box and then accesses the air circuit breaker with leakage protection, the air circuit breaker's alternating current source one way output passes through the DC stabilizer and gives the relay electromagnetic ring, the singlechip and its accessory module power supply, one way accesses each relay input end, passes through the electromagnetic switch and is powered for each way, provides the automatic control power supply and the timing control power supply, one way as the straight-through power output;The distribution box is equipped with smoke CO sensor, temperature and humidity sensor, residual current detector and outputs the signal to the singlechip, the singlechip outputs the signal to each way power supply relay, straight-through power supply and surge protector;The surge protector is connected with the alternating current contactor.

[0022] Specifically, according to the principle of simple installation and convenient maintenance, the distribution box is designed as a cuboid, the size is equivalent to the distribution box, and large devices such as alternating current contactors and air circuit breakers are directly fixed on the rear shell of the box body;Other voltage stabilizing modules, singlechip systems, communication modules, WiFi modules and each way electromagnetic relay are directly welded on the circuit board, the circuit board is fixed in the distribution box, and wire entry ports and wire exit ports are respectively arranged on the upper and lower sides of the distribution box shell, so that wires can be conveniently connected, and built-in WiFi antennas, smoke CO sensors, temperature and humidity sensors and residual current detectors are connected with each way power socket, which should be installed in proper positions in advance and wiring is completed.

[0023] Specifically, the device is provided with an alternating current contactor, has a lightning protection function, when the protector senses a power grid surge, the alternating current contactor is automatically disconnected, the connection between the circuit and the external network is cut off, in thunderstorm weather, the user can issue an instruction through a mobile phone APP to force the singlechip to forcibly disconnect the alternating current contactor through the surge protector, so as to prevent the distribution box and the electric appliance from being damaged by lightning, after the alternating current contactor is disconnected, the total power supply is cut off, and only manual closing can restore power distribution, and the air circuit breaker is provided with overcurrent and leakage protection functions, and the safety of power utilization is fully ensured.

[0024] According to another embodiment of the utility model, the DC stabilizer further supplies power to the WIFI module, the communication module and the singlechip.

[0025] According to another embodiment of the utility model, further include, the communication module and mobile phone two -way communication, WIFI module receives mobile phone instruction, WIFI module, communication module output signal to singlechip.

[0026] The specific operation process is that the state in the distribution box is collected by the smoke CO sensor, the temperature and humidity sensor and the residual current detector, and is transmitted to the single-chip microcomputer for data analysis, the analyzed and compared data is communicated with the mobile phone APP through the WIFI module and the communication module, and the alarm prompt function is achieved, and the power supply is selected to be cut off or the power supply is independently cut off through the mobile phone APP for protection.

[0027] According to another embodiment of the utility model, further include, the smoke CO sensor includes MQ-2 sensor and MQ-7 sensor, the 2 pins of the MQ-2 sensor and the MQ-7 sensor are connected with the power supply and the ground to supply power to the sensor, the DO pin is suspended, the analog quantity is output to the single-chip microcomputer through the AO pin, the collected analog quantity is converted into digital quantity through the channel 1 of the ADC1 of the single-chip microcomputer, and the change of the converted voltage value can directly reflect the change of the gas concentration.

[0028] Specifically, the MQ-2 sensor is usually used in the gas leakage monitoring device of a family and a factory, is suitable for detecting liquefied gas, benzene, smoke, alcohol and the like, the sensor can measure the gas concentration of 0.01% to 1%; the MQ-7 sensor has high sensitivity to carbon monoxide, the conductivity of the sensor increases with the increase of the carbon monoxide gas concentration, therefore, the change of the conductivity can be converted into a signal corresponding to the carbon monoxide concentration, and the MQ-7 sensor also has the characteristics of fast response speed and strong anti-interference ability, can work stably for a long time, and is widely used in a fire detection system.

[0029] According to another embodiment of the utility model, further include, the temperature and humidity sensor selects a DHT11 module, the sensor contains a humidity sensing module and a temperature sensing module, the indoor temperature and humidity parameters can be accurately measured, the temperature accuracy is ± 2 DEG C, the relative humidity accuracy is ± 5%, 2 pins are connected with the power supply and the ground to supply power to the sensor, data communication is carried out between the single bus and the single-chip microcomputer, the 5kΩ resistor is connected while the DATA line is driven, the low level is kept effective, and the anti-interference property of the circuit is enhanced and the current is limited.

[0030] According to another embodiment of the utility model, further include, the alternating current A, B, C phase line and N zero line pass through the residual current detector simultaneously, and the residual current detector is electrically connected with the single-chip microcomputer.

[0031] Specifically, the traditional circuit protection products (such as overcurrent overload protection device) can prevent the fire caused by the metal short circuit fault between the wires and the long-term overload heating or ground arc short circuit fault, but basically belong to passive prevention. In particular, for the line terminal temperature rise, the line slow increase or the leakage current slow increase caused by the metal terminal short circuit, overload fault or ground arc fault, it cannot play a good effect. Because the traditional circuit protection products operate under certain parameters, it cannot be prevented early. If the fault current does not reach the setting of the protection switch, the protection switch will not work, and the installation of the residual current detector in the line can solve such problems. When the current parameters in the protected line exceed the alarm setting value, a signal can be sent to eliminate the electrical fire hazard caused by the residual current.

[0032] The above description is only illustrative for the utility model, and is not restrictive, and those skilled in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all will fall within the protection scope of the utility model.

Claims

1. An electrical distribution box status detection device, characterized by, 220V AC power into the distribution box after the access to the AC contactor and then access to the air circuit breaker with leakage protection, the air circuit breaker AC power output through the DC voltage regulator for the relay solenoid, single-chip microcomputer and its attached modules power supply, a road access to each relay input, through the electromagnetic switch for each road power supply, provide automatic control power and timing control power, a road as a straight-through power output; The distribution box is provided with smoke CO sensor, temperature and humidity sensor, residual current detector and output signal to the single-chip microcomputer, the single-chip microcomputer output signal to each power supply relay, straight-through power supply and surge protector; The surge protector and AC contactor connection.

2. The electrical box status detection apparatus of claim 1, wherein The DC voltage regulator for WIFI module, communication module and single-chip microcomputer power supply.

3. The electrical box status detection apparatus of claim 2, wherein, The communication module and mobile phone two-way communication, WIFI module receives mobile phone instructions; The WIFI module, communication module output signal to the single-chip microcomputer.

4. The electrical box status detection apparatus of claim 1, wherein, The smoke CO sensor includes MQ-2 sensor and MQ-7 sensor, the 2 pins of the MQ-2 sensor and the MQ-7 sensor are connected to the power supply and the ground to supply power to the sensor, the DO pin is suspended, and the AO pin outputs an analog quantity to the single-chip microcomputer, and the collected analog quantity is converted into a digital quantity through channel 1 of the ADC1 of the single-chip microcomputer.

5. The electrical box status detection apparatus of claim 1, wherein, The temperature and humidity sensor selects DHT11 module, 2 pins are connected to the power supply and the ground to supply power to the sensor, and data communication is carried out with the single-chip microcomputer by using single bus, and the DATA line is driven at the same time, and a 5kΩ resistor is connected.

6. The electrical box status detection apparatus of claim 1, wherein, The AC A, B and C phase lines and N zero line pass through the residual current detector at the same time, and the residual current detector is electrically connected with the single-chip microcomputer.

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