CN204790456U - A on -off control device for family's power management - Google Patents

Abstract

The utility model relates to the technical field of household power supply management, in particular to a switch control device for household power supply management, comprising a relay, a current detection chip, a voltage comparator and a data trigger; the relay is externally connected to an AC power supply; The comparator is electrically connected to the CLK terminal of the data trigger: the output terminal of the data trigger is electrically connected to the relay; the current detection chip is used to detect the current in the circuit and send it to the voltage comparator, and the voltage comparator is used to control the data trigger to Controls the state of the relay. The utility model provides a switch control device for household power supply management, which monitors the current of electrical equipment in real time. When the equipment has a switch requirement, the control relay performs switching work when the current flowing through it is zero, and protects the contacts of the relay. No damage, not only greatly prolongs the service life of the relay, but also enhances the stability of the relay control power consumption.

Description

A switch control device for home power management

technical field

The utility model relates to the technical field of household power management, in particular to a switch control device for household power management.

Background technique

With the advancement of technology, smart homes are gradually entering civilian homes. As the most important device in smart homes, the reliability and durability of smart power management sockets is particularly important. In smart home, the management of household power supply is realized by controlling the power supply on and off, which can not only realize intelligent control, but also effectively reduce energy consumption.

Household electrical equipment includes lamps, televisions, air conditioners, refrigerators, washing machines, microwave ovens, rice cookers and other equipment, and the power is also different. The current of the equipment is nearly 10 amperes or more, and the current of the equipment is less than 1 ampere. Some are inductive, some are capacitive, and some are purely resistive, so it is ideal to use a relay to control the power switch; but the relay itself generally uses mechanical metal contacts to switch on and off. When the current is large, at the moment when the contacts are disconnected, due to the inertial effect of the current caused by the inductance of the electrical equipment, a high voltage is generated between the contacts instantly, and the air is broken down, resulting in a sparking phenomenon. This kind of sparking phenomenon is very harmful to the relay contacts, which not only greatly shortens the service life of the relay, but also causes instability of the control equipment, and sometimes directly damages the relay, causing the relay to fail. In order to avoid this situation, a relay with a large passing current is often used, but the volume of the relay is further increased, and the cost is also greatly increased. In the context of the miniaturization of all electronic products, the increase in volume reduces the use of relays. For household power management applications, the rise in prices has raised the consumption threshold and curbed the popularization and promotion of smart power management switches.

Utility model content

The purpose of the utility model is to provide a switch control device for household power supply management, so as to solve the technical problem in the prior art that small-volume relays are prone to sparking.

The utility model provides a switch control device for household power supply management, including a relay, a current detection chip, a voltage comparator and a data trigger; the relay is externally connected to an AC power supply; The terminals are electrically connected; the output terminal of the data trigger is electrically connected to the relay; the current detection chip is used to detect the current in the circuit and send it to the voltage comparator, and the voltage comparator is used to control the data trigger to control the state of the relay.

Further, the switch control device for household power management further includes a triode, one end of the triode is electrically connected to the relay, and the other end is electrically connected to the output end of the data flip-flop.

Further, the RS terminal of the data trigger is electrically connected to the relay; when the relay is in a non-pulling state, the data trigger is used to control the pull-in of the relay to turn on the circuit.

The utility model provides a switch control device for household power supply management, which monitors the current of electrical equipment in real time. When the equipment has a switch requirement, the control relay performs switching work when the current flowing through it is zero, and protects the contacts of the relay. No damage, not only greatly prolongs the service life of the relay, but also enhances the stability of the relay control power consumption.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

FIG. 1 is a schematic diagram of a switch control device for household power management provided by an embodiment of the present invention;

Reference signs:

1-relay; 2-current detection chip; 3-voltage comparator; 4-data trigger; 5-transistor.

Detailed ways

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Figure 1 is a schematic diagram of a switch control device for household power management provided by an embodiment of the utility model; as shown in Figure 1, a switch control device for household power management provided by the utility model includes a relay 1, a current Detection chip 2, voltage comparator 3 and data trigger 4; relay 1 is connected to an external AC power supply; current detection chip 2 is electrically connected to the CLK terminal of data trigger 4 through voltage comparator 3; the output terminal of data trigger 4 is connected to relay 1 Electrical connection; the current detection chip 2 is used to detect the current in the circuit and send it to the voltage comparator 2, and the voltage comparator 2 is used to control the data flip-flop 3 to control the state of the relay 1.

Wherein, the model used by the current detection chip 2 may be ACS712, the model used by the voltage comparator 3 may be LM393, and the model used by the data flip-flop may be 74LS74.

On the basis of the above-mentioned embodiments, the switch control device for household power management also includes a triode 5, one end of the triode 5 is electrically connected to the relay 1, and the other end is electrically connected to the output end of the data trigger 4, and the triode 5 is used for The output signal of the data flip-flop 4 is amplified, and the energy of the output signal is strengthened so as to better control the state of the relay 1 .

On the basis of the above embodiments, the RS end of the data flip-flop 4 is electrically connected to the relay 1 .

The working principle of this embodiment is: when the relay 1 is in the pull-in state, that is, the power supply of the electrical equipment is in the working state, the current detection chip 2 will detect the alternating current signal flowing through the electrical equipment, and convert the current signal into A voltage signal is output and sent to the voltage comparator 3; the voltage comparator 3 compares the voltage signal output by the current detection chip 2, and outputs a logic clock signal with a frequency of 50 Hz, which is input from the CLK terminal of the data flip-flop 4, Both the rising edge and the falling edge of the clock signal are the moments when the current crosses zero, so if this clock is used as the clock of the data flip-flop 4, the output transformation of the data flip-flop 4 is the transformation at the zero-crossing point of the current, so that it can be realized at zero When the current flows through the load, the electrical equipment is turned off, and the contacts of the protection relay are not damaged by ignition caused by high voltage impact. As shown in FIG. 1 , the D terminal is a shutdown signal terminal, and the RS terminal is an open signal terminal. D=0, RS=0, so when the clock triggers the data flip-flop 4, the flip-flop 4 outputs the logic 0 signal at the D end at the output end at the zero-crossing point of the current, so that the relay contact is disconnected.

When the relay 1 is in the non-pulling state, that is, the power supply of the electrical equipment is in the off state, at this time the current detection chip 2 cannot detect the current signal, and the voltage comparator 3 cannot generate the clock signal required by the data trigger 4. Controlling the "D terminal" can no longer make the relay 1 pick up. Therefore, the RS terminal of the data trigger 4 is used to control the pull-in of the relay. When RS=1, the output of the data trigger 4 is 1 without a clock, so that the relay is turned on and the electrical equipment is powered on.

Through the above methods, the utility model provides a switch control device for household power supply management, which is simple to operate, low in cost, easy to implement, and can protect the relay from damage without increasing the volume of the relay, and is especially suitable for smart home power supplies The application of management control switches makes the smart home switch control more and more durable and reliable.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (3)

1., for a switch controlling device for household electrical source management, it is characterized in that, comprise relay, current detecting chip, voltage comparator and data trigger;

Described relay external AC power supply; Described current detecting chip is held with the CLK of described data trigger by described voltage comparator and is electrically connected; The output terminal of described data trigger is electrically connected with described relay;

Described current detecting chip is used for the electric current in testing circuit and is sent to described voltage comparator, described voltage comparator for controlling described data trigger, to control the state of described relay.

2. the switch controlling device for household electrical source management according to claim 1, it is characterized in that, also comprise triode, one end of described triode is electrically connected with described relay, and the other end is electrically connected with the output terminal of described data trigger.

3. the switch controlling device for household electrical source management according to claim 1, is characterized in that, the RS end of described data trigger is electrically connected with described relay; When described relay is in non-pull state, described data trigger for controlling described relay adhesive, to connect circuit.