CN220190655U - Energy-saving and safe power adapter - Google Patents

Abstract

The utility model relates to the technical field of power adapters, in particular to an energy-saving and safe power adapter, which comprises a shell, a power connection plug, an output wire, a rectification voltage reduction unit and an intelligent control part, wherein the rectification voltage reduction unit is used for reducing and rectifying high-voltage alternating current accessed by the power connection plug to form low-voltage direct current and supplying the low-voltage direct current to the output wire for external equipment; the intelligent control part is provided with a current induction unit and a circuit on-off unit, the current induction unit is used for inducing the real-time current of the output wire, the circuit on-off unit is used for connecting or disconnecting the electric connection between the power connection plug and the rectification voltage reduction unit, and the intelligent control part is used for controlling the circuit on-off unit to keep a connected state or a disconnected state. Finally, the standby power consumption can be further reduced, the energy consumption is reduced, and the environmental protection pressure is reduced, so that the power adapter is more energy-saving and environment-friendly.

Description

Energy-saving and safe power adapter

Technical Field

The utility model relates to the technical field of power adapters, in particular to an energy-saving and safe power adapter.

Background

The power adapter is also called an external power supply, is a power supply voltage conversion device of small portable electronic equipment and electronic appliances, and is commonly used on small electronic products such as mobile phones, liquid crystal displays, notebook computers and the like. The device generally comprises components such as a shell, a transformer, an inductor, a capacitor, a control IC, a PCB and the like, and the working principle of the device is that the device is converted from alternating current input to direct current output.

When electric devices such as digital televisions, personal computers, mobile phone chargers and the like are plugged into wall sockets, electric energy is still consumed even if the products are in an idle state. Consumers typically consider their devices to have been powered off, and in fact the devices are simply in standby mode and still consume power.

For example, when you turn off the digital tv using the remote controller, the digital tv still consumes power in standby or sleep mode because the power supply inside the digital tv is still on and supplies power to the remote control receiver. Although the remote control receiver consumes very little power (about 0.1W), the power consumption in the standby state cannot be reduced due to insufficient intelligence of the power supply (such as a linear power supply) adopting the inefficiency technology, and as a result, power of several watts is wasted, which is called standby power consumption.

In recent years, the trend in the power adapter industry is to save energy and improve efficiency. The standby power consumption of the power adapter is considered for energy saving. It is estimated by the international energy agency that the consumption of home appliances of 5-15% worldwide is generated in standby mode, which is why we want to reduce standby power consumption. For example, the standby power consumption of the digital television is about l-5W, the standby power consumption of the set top box is about 2-10W, the standby power consumption of the personal computer and the display is about 3-10W, and the standby power consumption of the mobile phone charger is about 0.5-1W. When the energy consumption is similar to that of a invisible blood sucking insect, huge environmental protection pressure is formed while energy is wasted.

Therefore, how to provide an energy-saving and environment-friendly power adapter, thereby further reducing standby power consumption, reducing energy consumption and reducing environment-friendly pressure is a technical problem to be solved.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a technical scheme capable of solving the problems.

The utility model provides an energy-saving safe power adapter, which comprises a shell, an electric plug, an output wire, a rectifying and voltage-reducing unit and an intelligent control part, wherein the input end of the rectifying and voltage-reducing unit is electrically connected with an electric socket; the intelligent control part is provided with a current induction unit and a circuit on-off unit, the current induction unit is used for inducing the real-time current of the output wire, the circuit on-off unit is used for connecting or disconnecting the electric connection between the power connection plug and the rectification voltage reduction unit, and the intelligent control part is used for controlling the circuit on-off unit to keep a connected state or a disconnected state.

As a further scheme of the utility model: when the real-time current sensed by the current sensing unit is smaller than a preset current value, the intelligent control component controls the circuit on-off unit to keep an off state, so that the electric connection between the power connection plug and the rectification voltage reduction unit is disconnected.

As a further scheme of the utility model: the shell is also provided with a reset key which is fixedly connected to the shell, and the pressing part of the reset key protrudes out of the shell; the reset button is electrically connected with the intelligent control component and is used for sending out a reset signal.

As a further scheme of the utility model: the intelligent control part controls the circuit on-off unit to be converted into a communication state according to the reset signal, so that the electric connection between the communication electric plug and the rectification voltage reduction unit is realized.

As a further scheme of the utility model: the shell is internally provided with a circuit board which is fixedly connected inside the shell, and the power-on plug, the output lead, the rectifying and voltage-reducing unit and the intelligent control component are respectively and electrically connected with the circuit board, and the reset key is electrically connected with the circuit board.

As a further scheme of the utility model: the intelligent control part is also provided with a buzzer which is fixedly connected to the circuit board and is electrically connected with the intelligent control part through the circuit board; when the circuit on-off unit is converted from the on-state to the off-state, the intelligent control part controls the buzzer to emit short ringing; when the circuit on-off unit is switched from the off state to the on state, the intelligent control part controls the buzzer to generate long ringing sound.

As a further scheme of the utility model: the intelligent control part is also provided with a battery which is fixedly connected to the circuit board, and the battery is electrically connected with the intelligent control part and provides running power for the intelligent control part.

As a further scheme of the utility model: the intelligent control part includes:

the power module is used for managing the battery and providing working voltage for the intelligent control component;

the current detection module is used for detecting the real-time current in the output wire sensed by the current sensing unit;

the comparison module is used for comparing the magnitude relation between the real-time current detected by the current detection module and a preset current value, and sending out corresponding output signals when the real-time current is smaller than the preset current value;

the reset module is used for detecting the reset key and sending out corresponding output signals when detecting that the reset key sends out a reset signal;

the micro control unit sends a disconnected signal to the circuit control module according to the output signal of the comparison module, sends a connected signal to the circuit control module according to the output signal of the reset module, and also sends a corresponding connected prompt signal or disconnected prompt signal to the sound prompt module;

the circuit control module controls the circuit on-off unit to perform the disconnection operation or the connection operation of the circuit according to the signal sent by the micro control unit;

and the sound prompt module is used for controlling the buzzer to send out corresponding prompt sound according to the prompt signal sent by the micro-control unit.

As a further scheme of the utility model: the intelligent control part also comprises a timing module, which is used for starting timing operation when receiving the output signal of the comparison module, and sending out corresponding output signal when the timing time value is equal to the preset time value; and the micro control unit sends a disconnection signal to the circuit control module according to the output signal of the timing module, and also sends a corresponding disconnection prompt signal to the sound prompt module.

Compared with the prior art, the utility model has the beneficial effects that:

1. by arranging the circuit on-off unit, the electric connection between the power connection plug and the rectification voltage reduction unit can be disconnected when corresponding equipment is not used, and the standby power consumption of the power adapter is further reduced.

2. Through setting up current induction unit and intelligent control part to can be when the real-time electric current of power adapter is less than a preset current value, automatic disconnection connects between electric plug and the rectification step-down unit.

3. The corresponding reset key is further arranged, so that a user can use the power adapter from a new position by directly pressing the reset key without pulling out the power adapter from a new position, the operation intensity of the user is reduced, and the use experience of the user is improved.

4. Corresponding buzzers can be further arranged, corresponding sound reminding is carried out when the power adapter is disconnected or connected, and the use experience of a user is optimized.

5. Further set up battery and power module, can carry out the power supply through the battery when using parts such as touch button that need electric power operation, reduce the stand-by power consumption of power adapter.

Therefore, the utility model can further reduce standby power consumption, energy consumption and environmental protection pressure through the improvement, thereby leading the power adapter to be more energy-saving and environmental-friendly.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic structural view of a housing of the present utility model;

FIG. 2 is a schematic view of another angle of the housing of the present utility model;

FIG. 3 is a schematic diagram of a circuit board of the present utility model;

fig. 4 is a schematic structural view of the intelligent control unit of the present utility model.

Reference numerals and names in the drawings are as follows:

10 a housing; 11 resetting a key; 12 circuit boards; 13, connecting an electric plug; 14 output wires; 15 rectifying and reducing voltage units; 20 intelligent control components; a 21 current sensing unit; 22 a circuit on-off unit; a 23 buzzer; 24 cells; 30 micro control units; 31 a power module; a 32 current detection module; 33 comparison modules; 34 a circuit control module; a 35 sound prompting module; 36 a timing module.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 4, in an embodiment of the present utility model, an energy-saving and safe power adapter includes a housing 10, a power plug 13, an output wire 14, a rectifying and voltage-reducing unit 15 and an intelligent control component 20, wherein an input end of the rectifying and voltage-reducing unit 15 is electrically connected with a power socket, an output end of the rectifying and voltage-reducing unit 15 is electrically connected with the output wire 14, the intelligent control component 20 is electrically connected with the power plug 13, the output wire 14 and the rectifying and voltage-reducing unit 15 respectively, and the rectifying and voltage-reducing unit 15 is used for reducing and rectifying high-voltage alternating current connected to the power plug 13 to form low-voltage direct current and providing the low-voltage direct current to the output wire 14; the intelligent control part 20 is provided with a current sensing unit 21 and a circuit on-off unit 22, the current sensing unit 21 is used for sensing real-time current of the output wire 14, the circuit on-off unit 22 is used for connecting or disconnecting electrical connection between the power connection plug 13 and the rectification step-down unit 15, and the intelligent control part 20 is used for controlling the circuit on-off unit 22 to keep a connected state or keep a disconnected state.

Specifically, first, the power adapter mainly converts 220V high-voltage ac power of the commercial power into low-voltage dc power, so as to be used for general household appliances or small-sized devices. The specific conversion technology is already mature, and is mainly divided into a series linear voltage stabilizing conversion technology and a switching voltage stabilizing conversion technology, in the utility model, the switching voltage stabilizing conversion technology is preferably used, and the main circuit of the switching power supply is composed of an input electromagnetic interference filter (EMI), a rectifying and filtering circuit, a power conversion circuit, a PWM controller circuit and an output rectifying and filtering circuit. The auxiliary circuit comprises an input overvoltage and undervoltage protection circuit, an output overcurrent protection circuit, an output short circuit protection circuit and the like. The rectifying and step-down unit 15 preferably includes all of the main circuits and auxiliary circuits described above to provide a stable low voltage dc current to one end of the output conductor 14.

Secondly, a circuit on-off unit 22 is further arranged between the power-on plug 13 and the rectifying and voltage-reducing unit 15, and the circuit on-off unit 22 is used for switching on or switching off the electrical connection between the rectifying and voltage-reducing unit 15 and the power-on plug 13; a current sensing unit 21 is further disposed between the rectifying step-down unit 15 and the output wire 14, and the current sensing unit 21 can sense the real-time current of the output wire 14 in real time. It can be appreciated that the circuit on-off unit 22 may be implemented by using a product existing in the prior art, for example, a relay controlled by a single-chip microcomputer may be used to perform mechanical contact on-off, for example, a bidirectional thyristor may be used to control on-off of the alternating current, and for example, on-off of a solid-state relay controlled by alternating current may be used to control on-off of the alternating current.

As shown in fig. 3, preferably, when the real-time current sensed by the current sensing unit 21 is smaller than a preset current value, the intelligent control unit 20 controls the circuit on-off unit 22 to maintain the off state, so as to disconnect the electrical connection between the power plug 13 and the rectification step-down unit 15.

Specifically, the preset current value may be a current value when the external electric equipment connected by the output wire 14 enters the standby state, and in order to more accurately implement the corresponding function, the preset current value is preferably slightly larger than the current value in the standby state. For example, when the external electric equipment is normally used, the current value is 2A, and when the electric equipment is in a standby state, the current value is 0.02A, and then the preset current value can be set to be 0.03-0.05A. The preset current value is set in such a way that the preset current value is required to be larger than the standby current value of the external electric equipment and is also required to be far smaller than the current value of the external electric equipment in normal use. Of course, the current value of most electric equipment in normal use is far greater than the current value of the electric equipment in standby, so that the preset current value can be set to be greater than the standby current value of most electric equipment. For example, the current sensor may be set to 0.1 a, and when the real-time current value of the external electric device on the connection output lead 14 of the external electric device is less than 0.1 a, the external electric device may be considered to have entered the standby mode, and at this time, the current sensor 21 may send the sensed real-time current value to the intelligent control unit 20.

As shown in fig. 1 and 2, preferably, the casing 10 is further provided with a reset button 11, the reset button 11 is fixedly connected to the casing 10, and a pressing portion of the reset button 11 protrudes outside the casing 10; the reset button 11 is electrically connected with the intelligent control component 20, and the reset button 11 is used for sending out a reset signal.

Specifically, the reset button 11 may be used to switch on the circuit on-off unit 22 that is disconnected again, so that the power adapter starts to work from the new time and provides power for the external electric equipment from the new time. It will be appreciated that the reset button 11 may be any conventional product known in the art, such as a mechanical contact switch, or a touch feedback switch, so long as it can send a reset signal to the intelligent control unit 20.

Preferably, after the intelligent control unit 20 receives the reset signal of the reset key 11, the circuit on-off unit 22 may be controlled to be converted into a connected state according to the reset signal, so as to connect the electrical connection between the electrical plug 13 and the rectifying and voltage-reducing unit 15, thereby providing new power for the external electric equipment.

As shown in fig. 3, preferably, a circuit board 12 is disposed in the housing 10, the circuit board 12 is fixedly connected inside the housing 10, the power plug 13, the output wire 14, the rectification step-down unit 15 and the intelligent control component 20 are respectively electrically connected with the circuit board 12, and the reset key 11 is electrically connected with the circuit board 12.

Specifically, the rectifying and voltage reducing unit 15 and the intelligent control component 20 are preferably directly and fixedly connected to the circuit board 12, and the power receiving plug 13 and the output wire 14 may be directly and fixedly connected to the circuit board 12, or may be fixedly connected to the housing 10, and then electrically connected to the circuit board 12 by means of electrical wires.

As shown in fig. 1, preferably, the intelligent control component 20 is further provided with a buzzer 23, and the buzzer 23 is fixedly connected to the circuit board 12 and electrically connected with the intelligent control component 20 through the circuit board 12; when the circuit on-off unit 22 is switched from the on state to the off state, the intelligent control part 20 controls the buzzer 23 to emit a few sounds of short duration; when the circuit on-off unit 22 is switched from the off state to the on state, the intelligent control part 20 controls the buzzer 23 to sound a long sound.

Specifically, for better prompting the user, a corresponding buzzer 23 may be provided, and when the power adapter is disconnected, a short sound, preferably 1-4 times, may be generated. When the user presses the reset button 11, the intelligent control part 20 communicates the rectifying and voltage reducing unit 15 with the power receiving plug 13 from the new control circuit on-off unit 22, so that power is supplied to the external electric equipment again from the new outside, and at this time, the buzzer 23 can generate long ringing, preferably 1-2 times long ringing.

As shown in fig. 3, the intelligent control unit 20 is preferably further provided with a battery 24, the battery 24 is fixedly connected to the circuit board 12, and the battery 24 is electrically connected to the intelligent control unit 20 and provides operating power to the intelligent control unit 20.

Specifically, after the circuit on-off unit 22 is disconnected from the rectifying and voltage reducing unit 15, the power adapter cannot obtain corresponding dc power, so that an independent battery 24 can be set to supply power to the circuit on-off unit 22 and the micro-control unit 30, and the standby time can be maintained for a long time after the battery 24 is set because the power consumption of the micro-control unit 30 and the circuit on-off unit 22 is very small. Of course, it is preferable that the battery 24 is a rechargeable battery 24, and the micro-control unit 30 may also manage the battery 24 through the power module 31, and when the electric quantity of the battery 24 is insufficient, the automatic control circuit on-off unit 22 may switch on the electrical connection between the rectification step-down unit 15 and the power receiving plug 13, so as to recharge the battery 24 again. The rechargeable battery 24 may use a rechargeable lithium iron phosphate battery 24 of the prior art, thereby being more secure.

As shown in fig. 4, the intelligent control section 20 preferably includes:

a power module 31 for managing the battery 24 and supplying an operating voltage to the intelligent control section 20; specifically, the power module 31 may also control the charging and discharging of the battery 24.

A current detection module 32 for detecting the real-time current in the output wire 14 sensed by the current sensing unit 21;

a comparison module 33, configured to compare the magnitude relation between the real-time current detected by the current detection module 32 and a preset current value, and send out a corresponding output signal when the real-time current is smaller than the preset current value;

the reset module 37 is configured to detect the reset key 11, and send out a corresponding output signal when detecting that the reset key 11 sends out a reset signal;

the micro control unit 30 sends a disconnection signal to the circuit control module 34 according to the output signal of the comparison module 33, sends a connection signal to the circuit control module 34 according to the output signal of the reset module 37, and also sends a corresponding connection prompt signal or disconnection prompt signal to the sound prompt module 35; specifically, the micro control unit 30 may use a micro control unit 30 (Microcontroller Unit; MCU) in the prior art, also called a single chip microcomputer (Single Chip Microcomputer) or a single chip microcomputer, to properly reduce the frequency and specification of a central processing unit (CentralProcess Unit; CPU), and integrate peripheral interfaces such as a memory (memory), a counter (Timer), a USB, an a/D conversion, UART, PLC, DMA, and the like, and even an LCD driving circuit on a single chip to form a chip-level computer for performing different combination control for different application occasions.

The circuit control module 34 controls the circuit on-off unit 22 to perform the circuit switching-off operation or the circuit switching-on operation according to the signal sent by the micro control unit 30;

the sound prompting module 35 controls the buzzer 23 to generate corresponding prompting sound according to the prompting signal generated by the micro-control unit 30.

As shown in fig. 4, preferably, the intelligent control unit 20 further includes a timing module 36, configured to start timing operation when receiving the output signal of the comparison module 33, and send out a corresponding output signal when the counted time value is equal to the preset time value; the micro control unit 30 sends a disconnection signal to the circuit control module 34 according to the output signal of the timing module 36, and also sends a corresponding disconnection prompting signal to the sound prompting module 35.

Specifically, in order to make the power adapter more fit to the actual use situation of the user in daily work and life, a corresponding timing module 36 may be provided. That is, after the external electric equipment enters the standby mode, the intelligent control part 20 does not disconnect the rectifying and voltage-reducing unit 15 immediately, but starts to count, and when the counted time value is equal to the preset time value, the intelligent control part 20 controls the circuit on-off unit 22 to disconnect the rectifying and voltage-reducing unit 15. The preset time value is preferably set to 30-90 minutes, i.e. the user may not turn off the power adapter when using the external consumer for a short period of time.

When the power adapter is used, the power plug 13 of the power adapter is firstly inserted into an external power socket, so that the power adapter is electrified, and at the moment, external electric equipment can be connected to the output lead 14 of the power adapter for use. When the user does not use the external electric equipment, i.e. after the external electric equipment is turned off, the external electric equipment enters a standby mode, and the power consumption of the external electric equipment is relatively small at this time, i.e. the current through the output wire 14 is relatively small.

After the current sensing unit 21 senses that the current flowing through the output wire 14 becomes smaller, the sensed current value is sent to the intelligent control component 20, the current detection module 32 inside the intelligent control component 20 receives the real-time sensed current value and cooperates with the comparison module 33 to compare and analyze the magnitude relation between the real-time sensed current value and the preset current value, and when the real-time sensed current value is smaller than the preset current value, the timing module 36 starts timing.

When the time value counted by the timing module 36 is equal to the preset time value, the intelligent control component 20 sends a disconnection signal through the circuit control module 34, and after receiving the disconnection signal, the circuit on-off unit 22 performs a disconnection operation, so that the electrical connection between the rectifying and voltage-reducing unit 15 and the power-on plug 13 is disconnected.

When the user presses the reset button 11 to start the power adapter from a new time, the reset button 11 sends a corresponding reset signal, the reset module 37 receives the reset signal and feeds back the reset signal to the intelligent control component 20, the intelligent control component 20 sends a turn-on signal to the circuit control module 34, and the circuit control module 34 correspondingly sends a turn-on signal to control the circuit on-off unit 22 to perform turn-on operation, so that the electrical connection between the rectifying and voltage-reducing unit 15 and the power plug 13 is turned on from a new time, the power adapter works from a new time, and power is supplied to external electric equipment from a new time.

Therefore, the utility model can further reduce standby power consumption, energy consumption and environmental protection pressure through the improvement, thereby leading the power adapter to be more energy-saving and environmental-friendly.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (7)

1. The utility model provides an energy-conserving safe power adapter, a serial communication port, including casing (10), connect electric plug (13), output wire (14), rectification step-down unit (15) and intelligent control part (20), the input and the electric socket electric connection of rectification step-down unit (15), the output and the output wire (14) electric connection of rectification step-down unit (15), intelligent control part (20) are connected with electric plug (13), output wire (14) and rectification step-down unit (15) respectively, rectification step-down unit (15) are used for carrying out the step-down of high-voltage alternating current that connects electric plug (13) and rectification back and form low-voltage direct current, and provide output wire (14) for external equipment to use; the intelligent control component (20) is provided with a current sensing unit (21) and a circuit on-off unit (22), the current sensing unit (21) is used for sensing real-time current of the output wire (14), the circuit on-off unit (22) is used for connecting or disconnecting electrical connection between the power connection plug (13) and the rectification voltage reduction unit (15), and the intelligent control component (20) is used for controlling the circuit on-off unit (22) to keep a connected state or keep a disconnected state; when the real-time current sensed by the current sensing unit (21) is smaller than a preset current value, the intelligent control component (20) controls the circuit on-off unit (22) to keep an off state, so that the electric connection between the power connection plug (13) and the rectification voltage reduction unit (15) is disconnected; the shell (10) is also provided with a reset key (11), the reset key (11) is fixedly connected to the shell (10), and the pressing part of the reset key (11) protrudes out of the shell (10); the reset key (11) is electrically connected with the intelligent control component (20), and the reset key (11) is used for sending out a reset signal.

2. An energy-saving and safe power adapter according to claim 1, wherein the intelligent control unit (20) controls the circuit on-off unit (22) to be switched into a connected state according to the reset signal, thereby electrically connecting the power plug (13) and the rectifying and voltage-reducing unit (15).

3. The energy-saving safe power adapter according to claim 1, wherein a circuit board (12) is arranged in the shell (10), the circuit board (12) is fixedly connected inside the shell (10), the power connection plug (13), the output lead (14), the rectifying and voltage reducing unit (15) and the intelligent control component (20) are respectively and electrically connected with the circuit board (12), and the reset key (11) is electrically connected with the circuit board (12).

4. A power adapter according to claim 3, characterized in that the intelligent control part (20) is further provided with a buzzer (23), the buzzer (23) being fixedly connected to the circuit board (12) and being electrically connected to the intelligent control part (20) via the circuit board (12); when the circuit on-off unit (22) is switched from the on state to the off state, the intelligent control part (20) controls the buzzer (23) to generate a short ringing sound; when the circuit on-off unit (22) is switched from the off state to the on state, the intelligent control part (20) controls the buzzer (23) to generate long ringing sound.

5. The energy-saving and safe power adapter according to claim 4, wherein the intelligent control component (20) is further provided with a battery (24), the battery (24) is fixedly connected to the circuit board (12), and the battery (24) is electrically connected to the intelligent control component (20) and provides operating power for the intelligent control component (20).

6. The energy efficient and secure power adapter of claim 5, wherein the intelligent control unit (20) comprises:

a power module (31) for managing the battery (24) and providing an operating voltage to the intelligent control component (20);

a current detection module (32) for detecting a real-time current in the output wire (14) sensed by the current sensing unit (21);

the comparison module (33) is used for comparing the magnitude relation between the real-time current detected by the current detection module (32) and a preset current value, and sending out corresponding output signals when the real-time current is smaller than the preset current value;

the reset module (37) is used for detecting the reset key (11), and sending out corresponding output signals when detecting that the reset key (11) sends out a reset signal;

the micro control unit (30) sends a disconnection signal to the circuit control module (34) according to the output signal of the comparison module (33), sends a communication signal to the circuit control module (34) according to the output signal of the reset module (37), and also sends a corresponding communication prompt signal or disconnection prompt signal to the sound prompt module (35);

the circuit control module (34) controls the circuit on-off unit (22) to perform circuit off operation or circuit on-operation according to signals sent by the micro control unit (30);

the sound prompting module (35) controls the buzzer (23) to emit corresponding prompting sound according to the prompting signal emitted by the micro-control unit (30).

7. The energy-saving and safe power adapter according to claim 6, wherein the intelligent control unit (20) further comprises a timing module (36) for starting timing operation when receiving the output signal of the comparison module (33), and for emitting a corresponding output signal when the counted time value is equal to a preset time value; the micro control unit (30) sends a disconnection signal to the circuit control module (34) according to the output signal of the timing module (36), and also sends a corresponding disconnection prompt signal to the sound prompt module (35).