CN210572426U - A household smart meter control circuit that can display the name of the control place - Google Patents

Abstract

The utility model relates to a household intelligent ammeter control circuit capable of displaying control place names, which comprises a main control chip, an LCD display circuit, a relay power supply end, a normally open relay, a switch tube, a current sampling circuit, a wireless communication module and an SOC metering chip; the main control chip is respectively connected with the wireless communication module, the current sampling circuit and the SOC metering chip, and the SOC metering chip is connected with the LCD display circuit; two ends of a coil K1 of the normally open relay are respectively connected with a relay power supply end and an MCU-IO end of the main control chip through a switch tube; the electric meter can display the name of the controlled place, is convenient for a user to use, and has better intuition and practicability; meanwhile, the user can modify the place name in real time; the household electricity meter has the advantages that two paths of power supplies for loads can be timely cut off under the conditions of overhigh temperature and current overload, the safety is better, an air switch is replaced, the layout of the whole household line is simplified, the cost for installing the household line is reduced, and the functions of the household electricity meter are enriched.

Description

Household intelligent electric meter control circuit capable of displaying name of control place

Technical Field

The utility model belongs to the technical field of an ammeter technique and specifically relates to indicate a home-use smart electric meter control circuit that can show control place name.

Background

The air switch of a household light switch box often does not know which room the circuit is controlling, nor which appliances are controlled; therefore, in order to clearly control the situation, people generally attach a corresponding label to the air switch for identification, the attached label is easy to lose due to unstable attachment, and the characters on the label are inconvenient to modify, which affects the identification of a user.

Therefore, in the present invention, the applicant has elaborately studied a control circuit for a household smart meter capable of displaying a name of a control place to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the defects of the prior art and aims at providing a household intelligent ammeter control circuit capable of displaying a control place name, which enables an ammeter to display the controlled place name, is convenient for a user to use and has better intuitiveness and practicability; meanwhile, the user can modify the place name in real time; in addition, the household electricity meter can cut off two paths of power supplies of the load in time under the conditions of overhigh temperature and current overload, has better safety, replaces an air switch, simplifies the layout of the whole household line, reduces the installation cost of the household line, and enriches the functions of the household electricity meter.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a household intelligent electric meter control circuit capable of displaying names of control places comprises a main control chip, an LCD display circuit, a relay power supply end, a normally open relay, a switch tube, a current sampling circuit for measuring load current information, a wireless communication module for wirelessly connecting a mobile terminal or a wireless switch, and an SOC metering chip integrated with a clock chip, a temperature detection chip and an LCD driving module;

the main control chip is respectively connected with the wireless communication module, the current sampling circuit and the SOC metering chip, the SOC metering chip is connected with the LCD display circuit, and the LCD display circuit is provided with Chinese characters or English characters to display the name of a controlled place;

the main control chip is provided with an MCU-IO end, the normally open relay is provided with a coil K1, a first normally open contact K11 and a second normally open contact K12, the first normally open contact K11 is used for being connected with an alternating current commercial power live wire end and a load live wire input end respectively, one end of the coil K1 is connected with a relay power supply end, and the other end of the coil K1 is connected with the MCU-IO end through a switching tube;

the switch tube is provided with a control end, a first end and a second end; the control end is connected with the MCU-IO end; the first end is connected with the other end of the coil K1, and the second end is grounded;

when the SOC measures the chip and detects the temperature and the current value of load line when too high, SOC measures the chip and sends a signal to main control chip, and main control chip receives control MCU-IO end output low level after the signal, and the switch tube does not switch on, the first contact K11 that normally opens of normally opening relay and second normally open contact K12 disconnection are in order to cut off the power supply connection between interchange commercial power and the load simultaneously.

As a preferred scheme, the main control chip is also connected with an acousto-optic alarm module.

Preferably, the switch tube is an NPN tube Q1, and a base, a collector and an emitter of the NPN tube Q1 form a control terminal, a first terminal and a second terminal of the switch tube, respectively.

Preferably, the power supply end of the relay is 12V.

Preferably, the SOC metering chip is a single-phase metering SOC chip V9801.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly: the electric meter mainly comprises an SOC metering chip and an LCD display circuit, so that on one hand, the electric meter can display the name of a controlled place, the use by a user is convenient, and the intuition and the practicability are better; on the other hand, the user can modify the place name in real time through the wireless communication module; moreover, through the cooperation of the normally open relay and the switch, two paths of power supplies for load can be cut off in time under the conditions of overhigh temperature and current overload, the safety is better, an air switch is replaced, the layout of the whole family line is simplified, the cost for installing the family line is reduced, and the functions of the household electricity meter are enriched;

secondly, the acousto-optic alarm module can realize acousto-optic alarm under the conditions of overhigh temperature and current overload.

To more clearly illustrate the structural features and effects of the present invention, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Drawings

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

Fig. 2 is a partial circuit schematic diagram of an embodiment of the present invention.

10. Master control chip

21. Current sampling circuit 22 and wireless communication module

23. Acousto-optic alarm module

31. SOC measures chip 32, LCD display circuit

41. Switch tube 42 and normally open relay

43. And (4) loading.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

As shown in fig. 1 and fig. 2, a control circuit of a household smart meter capable of displaying names of control places comprises a main control chip 10, an LCD display circuit 32, a relay power supply terminal, a normally open relay 42, a switch tube 41, a current sampling circuit 21 for measuring current information of a load 43, a wireless communication module 22 for wirelessly connecting a mobile terminal or a wireless switch, and an SOC metering chip 31 integrating a clock chip, a temperature detection chip, and an LCD driving module;

the main control chip 10 is connected with the wireless communication module 22, the current sampling circuit 21 and the SOC metering chip 31 respectively, the SOC metering chip 31 is connected with the LCD display circuit 32, the LCD display circuit 32 has Chinese characters or English characters to display controlled place names (such as kitchen, toilet, primary horizontal position, secondary horizontal position 1, secondary horizontal position 2 and the like), and the LCD display circuit 32 can display contents (such as voltage, current, active power, power factor, power consumption and other parameters) displayed by a common intelligent electric meter. Preferably, the SOC metering chip 31 is a single-phase metering SOC chip V9801. The user can modify the Chinese characters or English characters of the LCD display circuit 32 on site through a mobile terminal (such as a mobile phone) or a wireless switch (such as a wireless remote controller), and can also set an alarm threshold value with overhigh temperature.

The main control chip 10 has MCU-IO end, normally open relay 42 has coil K1, is used for connecting respectively and exchanges first normally open contact K11 of commercial power live wire end and load live wire input and is used for connecting respectively and exchanges second normally open contact K12 of commercial power zero line end and load zero line input, the relay feed end is connected to coil K1's one end, preferably, the relay feed end is 12V. The other end of the coil K1 is connected with an MCU-IO end through a switch tube 41;

the switch tube 41 has a control end, a first end and a second end; the control end is connected with the MCU-IO end; the first end is connected with the other end of the coil K1, and the second end is grounded; in this embodiment, the switching tube 41 is a MOS tube, an IGBT tube, a power transistor, or a thyristor. Preferably, the switch tube 41 is an NPN tube Q1, and a base, a collector and an emitter of the NPN tube Q1 respectively form a control terminal, a first terminal and a second terminal of the switch tube 41. It should be noted that each load 43 is provided with a switch tube 41 and a normally open relay 42.

When the SOC metering chip 31 detects that the temperature and the current value of the load 43 line are too high, the SOC metering chip 31 sends a signal to the main control chip 10, the main control chip 10 receives the signal and then controls the MCU-IO end to output a low level, the switch tube 41 is not turned on, and the first normally open contact K11 and the second normally open contact K12 of the normally open relay 42 are turned off to simultaneously cut off the power supply connection between the ac utility power and the load 43.

The main control chip 10 is also connected with an audible and visual alarm module 23. Preferably, the sound and light alarm module 23 includes a buzzer and an LED lamp, and the buzzer and the LED lamp are respectively connected to the output pin of the main control chip 10. When the SOC metering chip 31 detects that the temperature of the load 43 line is too high, the temperature is sent to the main control chip 10 in combination with the current value of the load 43, and the main control chip 10 judges whether an electrical fire is caused; if the judgment is yes, the main control chip 10 controls the sound and light alarm module 23 to work, and realizes that the power supply of the load 43 is cut off in two ways (live wire and zero wire) through the switch tube 41.

The utility model has the design key points that the electric meter mainly comprises an SOC metering chip and an LCD display circuit, on one hand, the electric meter can display the name of a controlled place, is convenient for a user to use, and has better intuitiveness and practicability; on the other hand, the user can modify the place name in real time through the wireless communication module; moreover, through the cooperation of the normally open relay and the switch, two paths of power supplies for load can be cut off in time under the conditions of overhigh temperature and current overload, the safety is better, an air switch is replaced, the layout of the whole family line is simplified, the cost for installing the family line is reduced, and the functions of the household electricity meter are enriched;

secondly, the acousto-optic alarm module can realize acousto-optic alarm under the conditions of overhigh temperature and current overload.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims (5)

1. A household smart meter control circuit capable of displaying the name of the control place, is characterized in that: comprising a main control chip, an LCD display circuit, a relay power supply terminal, a normally open relay, a switch tube, a current for measuring the load current information A sampling circuit, a wireless communication module for wirelessly connecting a mobile terminal or a wireless switch, and an SOC metering chip integrating a clock chip, a temperature detection chip and an LCD driver module; The main control chip is respectively connected to the wireless communication module, the current sampling circuit and the SOC measurement chip, the SOC measurement chip is connected to the LCD display circuit, and the LCD display circuit has Chinese characters or English characters to display the name of the controlled place; The main control chip has an MCU-IO terminal, the normally open relay has a coil K1, a first normally open contact K11 for connecting the AC mains live wire terminal and the load live wire input terminal respectively, and a first normally open contact K11 for connecting the AC mains zero terminal respectively. The second normally open contact K12 of the line end and the load neutral line input end, one end of the coil K1 is connected to the power supply end of the relay, and the other end of the coil K1 is connected to the MCU-IO end through a switch tube; The switch tube has a control end, a first end and a second end; the control end is connected to the MCU-IO end; the first end is connected to the other end of the coil K1, and the second end is grounded; When the SOC metering chip detects that the temperature and current value of the load line are too high, the SOC metering chip sends a signal to the main control chip. After the main control chip receives the signal, it controls the MCU-IO terminal to output a low level, and the switch tube is not turned on. The first normally open contact K11 and the second normally open contact K12 of the normally open relay are disconnected to cut off the power supply connection between the AC mains and the load at the same time. 2 . The household smart meter control circuit capable of displaying the name of a control place according to claim 1 , wherein the main control chip is further connected with an acousto-optic alarm module. 3 . 3. A home smart meter control circuit capable of displaying the name of a control place according to claim 1, wherein the switch tube is an NPN tube Q1, and the base, collector and emitter of the NPN tube Q1 The poles respectively constitute the control end, the first end and the second end of the switch tube. 4 . The household smart meter control circuit capable of displaying the name of the control place according to claim 1 , wherein the power supply terminal of the relay is 12V. 5 . 5 . The home smart meter control circuit capable of displaying the name of a control place according to claim 1 , wherein the SOC metering chip is a single-phase metering SOC chip V9801. 6 .

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