CN217486152U

CN217486152U - Alternating current transmission circuit and socket

Info

Publication number: CN217486152U
Application number: CN202122719481.XU
Authority: CN
Inventors: 何世友
Original assignee: Shenzhen Baseus Technology Co Ltd
Current assignee: Shenzhen Baseus Technology Co Ltd
Priority date: 2021-11-06
Filing date: 2021-11-06
Publication date: 2022-09-23
Anticipated expiration: 2031-11-06

Abstract

The utility model relates to the technical field of electrical apparatus, in particular to alternating current transmission protection circuit and socket. The protection circuit comprises a power supply circuit and a protection circuit coupled to the power supply circuit; the protection circuit comprises a main control circuit, a surge detection circuit and a switching device connected in series to the power supply circuit, the main control circuit is in signal connection with the switching device and controls the on-off of the power supply circuit through the switching device, the input end of the surge detection circuit is connected with the power supply circuit to detect the current of the power supply circuit, and the output end of the surge detection circuit is connected with the main control circuit. Socket, including socket ontology and set up the circuit structure in socket ontology, circuit structure does the utility model provides an alternating current transmission circuit. The utility model provides a pair of alternating current transmission circuit and socket have solved current alternating current transmission circuit technical problem safe inadequately to alternating current transmission circuit's security has been improved.

Description

Alternating current transmission circuit and socket

[ technical field ] A method for producing a semiconductor device

The utility model relates to the technical field of electrical apparatus, in particular to alternating current transmission circuit and socket.

[ background of the invention ]

Alternating current transmission circuits are widely applied in daily life of people, and for convenience of control, alternating current transmission circuits with switches appear.

However, the existing alternating current transmission circuit with a switch only has the function of manual switching on and switching off, and when the input voltage is abnormal, corresponding protection measures are not provided, so that potential safety hazards exist.

[ Utility model ] content

For solving the technical problem that current alternating current transmission circuit is safe inadequately, the utility model provides an alternating current transmission circuit and socket.

The utility model provides a solution to the technical problem to provide an alternating current transmission circuit, the alternating current transmission circuit includes power supply circuit and coupling is in the protection circuit on the power supply circuit;

the protection circuit comprises a main control circuit, a surge detection circuit and a switch device connected in series with the power supply circuit, wherein the main control circuit is in signal connection with the switch device and controls the on-off of the power supply circuit through the switch device;

the input end of the surge detection circuit is connected with the power supply circuit, and the output end of the surge detection circuit is connected with the main control circuit; the surge detection circuit comprises a transformer, and the main control circuit is electrically isolated from the power supply circuit through the transformer.

Preferably, the surge detection circuit comprises a voltage dependent resistor connected to the power supply circuit.

Preferably, the primary coil of the transformer is connected with the power supply circuit through a voltage dependent resistor, and the secondary coil of the transformer is connected with the main control circuit.

Preferably, the switching device is one or more of a combination of a bidirectional thyristor, a relay and a MOS tube.

Preferably, the protection circuit further includes an AC voltage detection circuit, the AC voltage detection circuit is connected to the power supply circuit to detect the voltage of the power supply circuit, and an output end of the AC voltage detection circuit is connected to the main control circuit.

Preferably, when the input voltage of the power supply circuit is within a preset voltage threshold range, the main control circuit controls the switching device to be connected.

Preferably, the preset voltage threshold is 90V to 250V.

Preferably, the protection circuit further includes a temperature detection circuit to detect a temperature of the ac power transmission circuit, and the temperature detection circuit is connected to the main control circuit.

Preferably, the temperature detection circuit detects the temperature of the switch device and feeds back the detected temperature value to the main control circuit, and the main control circuit controls the on-off of the switch device according to the detected temperature value.

Preferably, the protection circuit further comprises a switch isolation control circuit, and the switch device is connected with the main control circuit through the switch isolation control circuit.

Preferably, the switch isolation control circuit comprises an optocoupler.

Preferably, the protection circuit further comprises an alarm circuit, and the main control circuit is in signal connection with the alarm circuit and controls the alarm circuit to alarm.

The utility model provides a technical problem still another scheme provides a socket, including socket ontology and set up in circuit structure in the socket ontology, circuit structure is foretell an alternating current transmission circuit.

Compared with the prior art, the utility model provides a pair of alternating current transmission circuit has following advantage:

1. the embodiment of the utility model provides an alternating current transmission circuit, including power supply circuit with be coupled in protection circuit on the power supply circuit, protection circuit include master control circuit, surge detection circuit and concatenate the switching device on power supply circuit, master control circuit and switching device signal connection and the break-make through switching device control power supply circuit. By the design of coupling the switching device on the power supply circuit, the problem that the ignition phenomenon is easily generated at the switch in the alternating current transmission circuit is effectively avoided, so that the safety and the reliability of the alternating current transmission circuit are improved. In addition, the design of controlling the on-off of the alternating current transmission circuit through the switch device enables the service life of the protection circuit in the alternating current transmission circuit to be longer, and therefore the service life of the protection circuit of the alternating current transmission circuit is prolonged. In addition, the protection circuit further comprises a surge detection circuit, so that the high-voltage surge and lightning stroke input by the power supply circuit can be detected abnormally, firstly, the internal element can be prevented from being damaged when external voltage is abnormal, the normal work of the alternating current transmission circuit is ensured, secondly, the power supply circuit and the protection circuit can be electrically isolated through the transformer, and further the safety of the alternating current transmission circuit is improved.

2. The embodiment of the utility model provides an alternating current transmission circuit, surge detection circuit include the design of piezo-resistor and transformer, and when supply circuit input high voltage, the piezo-resistor switches on, and the voltage grow of the primary coil of transformer this moment, before switching device does not puncture, and the voltage and the electric current of the secondary coil of transformer all reduce, can electrical isolation supply circuit and protection circuit through this design.

3. The embodiment of the utility model provides an alternating current transmission circuit, switching device are bidirectional thyristor, relay and/or MOS pipe, and switching device is the design of the semiconductor switch that non-physics opened and shut, and the difficult problem that takes place physics switch and strike sparks, and the security is higher. When the switching device is the bidirectional thyristor, the problem that the ignition phenomenon is easy to generate at the switch in the alternating current transmission circuit is effectively avoided, so that the safety and the reliability of the alternating current transmission circuit are improved. In addition, the design that the on-off of the alternating current transmission circuit is controlled by the bidirectional thyristor enables the service life of the protection circuit in the alternating current transmission circuit to be longer, and therefore the service life of the protection circuit of the alternating current transmission circuit is prolonged.

4. The embodiment of the utility model provides an alternating current transmission circuit, protection circuit still include AC voltage detection circuit, and AC voltage detection circuit can detect the magnitude of voltage of power supply circuit input. In addition, when the AC voltage detection circuit detects that the voltage input by the power supply circuit is within the preset voltage threshold range, the main control circuit controls the switch device to be communicated, and normal power supply of the power supply circuit is further ensured. When the main control circuit judges that the AC voltage detection circuit detects that the voltage input by the power supply circuit is out of the preset voltage threshold range, namely the voltage input by the power supply circuit is abnormal, at the moment, the main control circuit controls the switching device to be switched off, and then the power supply circuit is controlled to stop supplying power. Through the design of the main control circuit and the AC voltage detection circuit, the safety and the reliability of the alternating current transmission circuit are further ensured.

5. The embodiment of the utility model provides an alternating current transmission circuit, protection circuit include temperature detection circuit, and temperature detection circuit detects alternating current transmission circuit's temperature, can feed back to master control circuit and then control supply circuit's break-make according to the temperature that detects. Further, a threshold value at which the temperature detection circuit detects an excessive temperature of the switching device may be set in advance. When the main control circuit judges that the temperature detection circuit detects that the temperature of the switching device is too high, namely the alternating current output circuit is abnormal at the moment, the main control circuit controls the switching device to be switched off, and then the power supply circuit is controlled to stop supplying power. Through the design of the main control circuit and the temperature detection circuit, the safety and the reliability of the alternating current transmission circuit are further ensured.

6. The embodiment of the utility model provides an alternating current transmission circuit, protection circuit include switch isolation control circuit, and master control circuit controls switching device through switch isolation control circuit, can electrical isolation supply circuit and master control circuit, and then avoid damage master control circuit such as surge voltage among the supply circuit to alternating current transmission circuit's life-span has been prolonged. In addition, the design of electrically isolating the power supply circuit from the main control circuit can prevent high-voltage alternating current from being directly connected with the main control circuit, so that the safety of manually controlling the on-off of the alternating current transmission circuit by a user is further improved. In addition, the switch isolation control circuit comprises an optical coupler, so that the reliable isolation control of the main control circuit on the switch device is further ensured, and the main control circuit is safer and more reliable.

7. The embodiment of the utility model provides an alternating current transmission circuit, protection circuit still include alarm circuit, through designing alarm circuit, when high-pressure surge and thunderbolt etc. that surge detection circuit detected the power supply circuit input are unusual, when AC voltage detection circuit detected the voltage of power supply circuit input not in voltage threshold value within range and/or when temperature detection circuit detected switching device's temperature is unusual, alarm circuit sent the police dispatch newspaper, make things convenient for people in time to discover that alternating current transmission circuit appears unusually.

8. The embodiment of the utility model provides a socket that still provides has and has the same beneficial effect with foretell alternating current transmission circuit, does not do here and give unnecessary detail.

[ description of the drawings ]

Fig. 1 is a first schematic block diagram of a circuit configuration of an ac power transmission circuit according to a first embodiment of the present invention;

fig. 2 is a schematic block diagram of a circuit configuration of an ac power transmission circuit according to a first embodiment of the present invention;

fig. 3 is a schematic circuit diagram of a power supply circuit of an ac power transmission circuit according to a first embodiment of the present invention;

fig. 4 is a schematic circuit diagram of a main control circuit of an ac power transmission circuit according to a first embodiment of the present invention;

fig. 5 is a schematic circuit diagram of an AC voltage detection circuit of the AC power transmission circuit according to the first embodiment of the present invention;

fig. 6 is a schematic circuit diagram of a surge detection circuit of an ac power transmission circuit according to a first embodiment of the present invention;

fig. 7 is a schematic circuit diagram of a switch isolation control circuit of an ac power transmission circuit according to a first embodiment of the present invention;

fig. 8 is a schematic structural diagram of a socket according to a second embodiment of the present invention.

The attached drawings indicate the following:

1. an alternating current transmission circuit; 3. a socket;

11. a power supply circuit; 21. a protection circuit; 22. a switching device; 23. A master control circuit; 24. a surge detection circuit; 25. an AC voltage detection circuit; 26. an alarm circuit; 27. a temperature detection circuit; 28. a switch isolation control circuit; 29. a voltage stabilizing circuit;

31. a socket body; 32. a circuit structure.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and fig. 2, a first embodiment of the present invention provides an ac power transmission circuit 1. The alternating current power transmission circuit 1 comprises a power supply circuit 11 and a protection circuit 21 coupled on the power supply circuit 11; the protection circuit 21 comprises a main control circuit 23, a surge detection circuit 24 and a switch device 22 connected in series with the power supply circuit 11, wherein the main control circuit 23 is in signal connection with the switch device 22 and controls the on-off of the power supply circuit 11 through the switch device 22; the input end of the surge detection circuit 24 is connected with the power supply circuit 11, and the output end of the surge detection circuit 24 is connected with the main control circuit 23.

It can be understood that the protection circuit 21 of the first embodiment of the present invention includes a main control circuit 23 and a switch device 22 connected in series to the power supply circuit 11, wherein the main control circuit 23 is in signal connection with the switch device 22 and controls the on/off of the power supply circuit 11 through the switch device 22. By the design of coupling the switching device 22 to the power supply circuit 11, the problem that arcing is easily generated at the switch in the ac power transmission circuit 1 is effectively avoided, thereby improving the safety and reliability of the ac power transmission circuit 1.

Further, the design of controlling the on-off of the ac transmission circuit 1 by the switch device 22 makes the service life of the protection circuit 21 in the ac transmission circuit 1 longer, thereby improving the service life of the protection circuit 21 in the ac transmission circuit 1.

Further, the utility model discloses protection circuit 21 of first embodiment still includes voltage stabilizing circuit 29, and voltage stabilizing circuit 29 is connected with master control circuit 23, and voltage stabilizing circuit 29 is the power supply of master control circuit 23.

It should be understood that the voltage stabilizing circuit 29 according to the first embodiment of the present invention may be an input circuit connected to the primary input terminal. The input circuit is an input circuit of a conventional primary side feedback system and comprises an alternating current input, a primary rectification and a primary filtering which are connected in sequence. And then a primary input power supply is provided for the transformer, the load to be charged is connected with a secondary output end, and the secondary output end charges the power supply for the charging load.

It should be noted that, the utility model discloses a power supply circuit 11 of first embodiment is partly transmitted to voltage stabilizing circuit 29, and another part is exported and then is supplied power for the socket, and voltage stabilizing circuit 29 is main control circuit 23, surge detection circuit 24, AC voltage detection circuit 25, warning circuit 26, temperature detection circuit 27 and switch isolation control circuit 28 power supply.

Referring to fig. 2 and 3, the power supply circuit 11 of the first embodiment of the present invention includes an AC input terminal and an AC output terminal, and it can be understood that the AC input terminal is used for inputting AC power, and the AC output terminal is used for outputting AC power and supplying power to the socket.

The utility model discloses protection circuit 21 of first embodiment includes surge detection circuit 24, resistance R1, electric capacity C2, switching device 22 and master control circuit 23, resistance R1 and electric capacity C2 establish ties each other and constitute resistance-capacitance absorption resistance, it can protect switching device 22 not punctured, surge detection circuit 24 is connected with power supply circuit 11, switching device 22 is coupled in power supply circuit 11, switching device 22 and surge detection circuit 24 all are connected with master control circuit 23.

It will be appreciated that when AC power is input, the main control circuit 23 controls the switching device 22, and thus the power supply circuit 11, to be switched on and off.

It should be noted that the switching device 22 of the present embodiment may be a triac, a relay and/or a MOS transistor. The switch device 22 is designed as a semiconductor switch that is not physically opened and closed, so that the problem of ignition of the physically opened and closed switch is not easily caused, and the safety is higher. When the switching device 22 is a triac, the problem that the ignition phenomenon is easily generated at the switch in the ac power transmission circuit 1 is effectively avoided, thereby improving the safety and reliability of the ac power transmission circuit 1. In addition, the design that the on-off of the alternating current transmission circuit 1 is controlled by the bidirectional thyristor enables the service life of the protection circuit 21 in the alternating current transmission circuit 1 to be longer, and therefore the service life of the protection circuit 21 of the alternating current transmission circuit 1 is prolonged.

It can be understood that the protection circuit 21 further includes a surge detection circuit 24, which is designed to detect abnormalities such as high-voltage surge and lightning stroke input by the power supply circuit 11, and prevent internal components from being damaged when external voltage is abnormal, thereby ensuring normal operation of the ac power transmission circuit 1.

It is understood that the main control circuit 23 of the present embodiment may be a single chip, a microcontroller, a field programmable gate array, a general array logic, or any combination thereof.

Specifically, referring to fig. 4, the main control circuit 23 of the first embodiment of the present invention is a chip with a model of QFN20, which is an 8-bit Microcontroller (MCU) based on a low power consumption platform, so that it is very suitable for any battery running application. It also has 8kB flash, 0.5kBRAM, 16 digital I/O pins, 4x16 bit timer, 3 PCA channels and other peripheral communication devices.

The main control chip U4 is used to control the on/off of the switching device 22, and the main control chip U4 is also used to receive the information collected by the surge detection circuit 24 and the AC voltage detection circuit 25. The main control chip U4 is also used for receiving the temperature information collected by the temperature detection circuit 27.

Further, please refer to fig. 3 and fig. 6, the surge detection circuit 24 of the first embodiment of the present invention at least includes a voltage dependent resistor MOV1 and a transformer T1, the voltage dependent resistor MOV1 is connected to the power supply circuit 11, the primary coil of the transformer T1 is connected to the power supply circuit 11 through a voltage dependent resistor MOV1, and the secondary coil of the transformer T1 is connected to the main control circuit 23. By means of the design, the power supply circuit 11 and the protection circuit 21 can be electrically isolated through the transformer T1, and therefore safety of the alternating-current power transmission circuit 1 is improved

Specifically, the surge detection circuit 24 of the present embodiment includes a varistor MOV1, a transformer T1, an AC-AC converter D4, a resistor R16, a resistor R17, a resistor R18, a resistor R19, and a transistor Q3. One end of a piezoresistor MOV1 is connected with the power supply circuit 11, the other end of the piezoresistor MOV1 is connected with a primary coil of a transformer T1, a secondary coil of the transformer T1 is connected with one end of an AC-AC converter D4, the other end of the AC-AC converter D4 is connected with one end of a resistor R18, one end of a resistor R18 is connected with one end of a resistor R17, the other end of a resistor R18 is grounded, the other end of the resistor R17 is connected with one end of a resistor R19, the other end of the resistor R19 is grounded, an emitter of a triode Q3 is grounded, a base of the triode Q3 is connected with the resistor R17 and the resistor R19, and a collector of the triode Q3 is connected with a PA4 pin of the main control circuit 23.

It will be appreciated that when the voltage input to the power supply circuit 11 is low, the voltage dependent resistor MOV1 is open and the switching device 22 is open. When the voltage input by the power supply circuit 11 is high voltage, the voltage dependent resistor MOV1 is turned on, and both the input voltage and the input current become large, before the switch device 22 is not broken down, the current of the secondary coil of the transformer T1 is reduced under the action of the transformer T1, and the triode Q3 is in a conducting state, so that the main control circuit 23 controls the switch device 22 to be turned off, and the power supply circuit 11 and the protection circuit 21 are electrically isolated. The safety of the ac power transmission circuit 1 is thereby improved by this design. It is to be understood that a low voltage is a relative high voltage, where a low voltage refers to a voltage less than the turn-on threshold of the varistor MOV1 and a high voltage refers to a voltage greater than or equal to the turn-on threshold of the varistor MOV 1. Optionally, in the embodiment of the present invention, the on threshold of the voltage dependent resistor MOV1 is 1000V, and the voltage dependent resistor MOV1 is turned on when the input voltage is greater than 1000V.

Further, please refer to fig. 3 and fig. 5, the protection circuit 21 of the embodiment of the present invention further includes an AC voltage detection circuit 25, wherein the AC voltage detection circuit 25 is connected to the power supply circuit 11 to detect the voltage of the power supply circuit 11, and the output terminal of the AC voltage detection circuit 25 is connected to the main control circuit 23.

Specifically, the AC voltage detection circuit 25 includes a resistor R27, a resistor R28, a transformer T2, a diode ZD3, and a capacitor C10. The primary coil of the transformer T2 is connected with the input end of the power supply circuit 11, the resistor R27 and the resistor R28 are connected in series and then connected with the primary coil of the transformer T2, the secondary coil of the transformer T2 is connected with the diode ZD3, and the anode of the diode ZD3 is connected with the capacitor C10.

It can be understood that the AC voltage detection circuit 25 is used for detecting the voltage value input by the power supply circuit 11, and when the AC voltage detection circuit 25 detects that the voltage value input by the power supply circuit 11 is normal, the main control circuit 23 controls the switching device 22 to be connected, thereby ensuring normal power supply of the power supply circuit 11. When the AC voltage detection circuit 25 detects that the voltage value input by the power supply circuit 11 is abnormal, the main control circuit 23 controls the switching device 22 to be turned off, thereby stopping the power supply circuit 11 from supplying power. By this design, the safety and reliability of the ac power transmission circuit 1 are further ensured.

Further, the main control circuit 23 stores a preset voltage threshold, and when the input voltage of the power supply circuit 11 is within the preset voltage threshold, the main control circuit 23 controls the switch device 22 to be connected. The preset voltage threshold of the present embodiment is 90V to 250V.

When the power adapter is of the american standard, the voltage threshold is 100V to 120V.

When the power adapter is of the english, middle, or european standard, the voltage threshold is 200V to 240V.

It will be appreciated that the switching device 22 is in the connected state when the voltage value of the AC input is within the voltage threshold range. When the voltage value of the AC input is not outside the voltage threshold range, the main control circuit 23 controls the switching device 22 to be turned off, and at this time, the switching device 22 is in an off state, and at this time, the power supply circuit 11 stops supplying power. Whether the voltage of the AC input is in a normal operating range is detected by the AC voltage detection circuit 25, and whether the switching device 22 is turned off is controlled by the main control circuit 23. Through the design, the condition that a user manually controls the on-off of the alternating current transmission circuit 1 can be avoided, and the safety of the alternating current transmission circuit 1 is further improved.

Further, please refer to fig. 2 and fig. 7, the protection circuit 21 of the first embodiment of the present invention further includes a switch isolation control circuit 28, and the switch device 22 is connected to the main control circuit 23 through the switch isolation control circuit 28. The switch isolation control circuit 28 of the present embodiment includes an optocoupler.

It can be understood that, by providing the switch isolation control circuit 28, the main control circuit 23 controls the switch device 22 through the switch isolation control circuit 28, so as to electrically isolate the power supply circuit 11 from the main control circuit 23, thereby preventing surge voltage and the like in the power supply circuit 11 from damaging the main control circuit 23, and prolonging the service life of the ac power transmission circuit 1. In addition, the design of electrically isolating the power supply circuit 11 from the main control circuit 23 can prevent the high-voltage alternating current from being directly connected with the main control circuit 23, thereby further improving the safety of a user for manually controlling the on-off of the alternating current transmission circuit 1.

Further, when the switch device 22 is connected with a high voltage, isolation control needs to be performed on the power supply circuit 11 and the main control circuit 23, the optical coupler of the embodiment has a good isolation effect, and through the arrangement of the optical coupler, the optical coupler is used for isolating direct weak current and strong current of the power supply circuit 11 and the main control circuit 23, when the switch device 22 is connected with a high voltage, the communication time of the switch device 22 is controlled through the optical coupler, so that the high voltage of the switch device 22 is isolated, and the main control circuit 23 is safer and more reliable.

Specifically, the switch isolation control circuit 28 includes an optocoupler U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, and a transistor Q2.

The optocoupler U1 has 6 pins, the anode of the light emitter of the optocoupler U1 (i.e., pin 1 of the optocoupler U1) is connected to a 5V voltage through a resistor R4, the collector of the transistor Q2 is coupled to the cathode of the light emitter of the optocoupler U1 (i.e., pin 2 of the optocoupler U1), the emitter of the transistor Q2 is grounded, the base of the transistor Q2 is coupled to a pin PA7 of the main control chip U4 through a resistor R7, the resistor R7 is further connected in series to a resistor R6, and the other end of the resistor R6 is grounded.

One end of the light receiver of the optical coupler U1 (namely a pin 6 of the optical coupler U1) is coupled with alternating current power transmission through a resistor R3 and a resistor R4, the other end of the light receiver of the optical coupler U1 (namely a pin 4 of the optical coupler U1) is connected with a bidirectional thyristor Q1 and a resistor R5, the resistor R5 is connected with the bidirectional thyristor Q1 in series, and a pin 5 and a pin 3 of the optical coupler U1 are both suspended.

It is understood that the operation process of the switch isolation control circuit 28 is: the optical coupler U1 is an optical coupler with the model number MOC3041, and a zero-crossing detection circuit is arranged in the optical coupler U1. When the input pin of the optocoupler U1 inputs corresponding current, the voltage value between the pin 6 and the pin 4 of the optocoupler U1 slightly crosses zero, at this time, the bidirectional thyristor in the optocoupler U1 is turned on, and when the main control chip U4 acquires an alternating current voltage zero-crossing electrical signal, the main control chip U4 is triggered to generate one-time event interruption, and the trigger switch device 22 is used for driving, so that the switch device 22 is controlled to be connected. When the input pin of the optocoupler U1 inputs 0mA current, the bidirectional thyristor in the optocoupler U1 is turned off at the moment, and after the master control chip U4 receives the signal, the master control chip U4 sends a signal to the switch device 22, so that the switch device 22 is controlled to be turned off, and the power supply circuit 11 stops supplying power.

Further, the utility model discloses protection circuit 21 of first embodiment still includes temperature detection circuit 27 to detect the temperature of alternating current transmission circuit 1, temperature detection circuit 27 is connected with master control circuit 23.

It will be appreciated that the temperature sensing circuit 27 includes at least a thermistor.

It should be understood that the utility model discloses the temperature detection circuit 27 of first embodiment detects the temperature of alternating current transmission circuit 1 to feed back the temperature value that detects to master control circuit 23, thereby master control circuit 23 controls the break-make of power supply circuit 11.

Further, the temperature detection circuit 27 detects the temperature of the switch device 22 and feeds back the detected temperature value to the main control circuit 23, and the main control circuit 23 controls the on/off of the switch device 22 according to the detected temperature value.

It should be understood that the temperature detection circuit 27 of the first embodiment of the present invention is used for detecting the temperature of the switch device 22 and sending the detected temperature value of the switch device 22 to the main control circuit 23.

In a specific application, the overtemperature threshold of the switching device 22 is detected by presetting the temperature detection circuit 27, when the main control circuit 23 judges that the temperature of the switching device 22 detected by the temperature detection circuit 27 exceeds the overtemperature threshold, the fact that the temperature of the switching device 22 is overtemperature at the moment is meant, the alternating-current power transmission circuit 1 is abnormal, then the main control circuit 23 gives an OFF signal to the switching device 22, the switching device 22 is turned OFF at the moment, and the power supply circuit 11 is controlled to stop supplying power.

Optionally, the over-temperature threshold preset in the first embodiment of the present invention is between 70 ℃ and 110 ℃. Preferably, the preset over-temperature threshold is 80-100 ℃.

Specifically, the predetermined over-temperature threshold may be, but is not limited to, 70 ℃, 75 ℃, 80 ℃, 85 ℃, 95 ℃, 100 ℃, 105 ℃ or 110 ℃.

Further, the utility model discloses protection circuit 21 of first embodiment still includes alarm circuit 26, and main control circuit 23 and alarm circuit 26 signal connection and control alarm circuit 26 report to the police.

It is understood that the alarm circuit 26 gives an alarm indication when the surge detection circuit 24 detects an abnormal situation such as a high voltage surge and a lightning stroke input from the power supply circuit 11, when the AC voltage detection circuit 25 detects that the voltage value of the AC input exceeds the voltage threshold value, or when the temperature detection circuit 27 detects that the temperature value of the AC power transmission circuit 1 is abnormal.

It should be noted that the alarm circuit 26 according to the embodiment of the present invention includes a buzzer, an audible and visual alarm, and/or a light alarm. When the alarm circuit 26 is a buzzer, the buzzer sounds when the main control circuit outputs a high level.

In summary, the power supply circuit inputs ac power, a part of the ac power is transmitted to the voltage stabilizing circuit, and the voltage stabilizing circuit supplies power to the main control circuit. And one part of the power is transmitted to the socket to supply power to the socket. The main control circuit further controls the on-off of the power supply circuit through the control switch device. The surge detection circuit is used for detecting the abnormality such as high-voltage surge and lightning stroke input by the power supply circuit, and can prevent internal elements from being damaged when external voltage is abnormal. The AC voltage detection circuit can detect the voltage value input by the power supply circuit, when the AC voltage detection circuit detects that the voltage value input by the power supply circuit is normal, the main control circuit controls the switch device to be communicated, so that normal power supply of the power supply circuit is ensured, and when the AC voltage detection circuit detects that the voltage value input by the power supply circuit is abnormal, the main control circuit controls the switch device to be switched off, so that the power supply circuit is controlled to stop supplying power. The temperature detection circuit is used for detecting the temperature of the switch device, when the main control circuit judges that the temperature detection circuit detects the over-temperature of the switch device, the alternating current output circuit is abnormal, the main control circuit controls the switch device to be switched off, and then the power supply circuit is controlled to stop supplying power. The switch isolation control circuit is used for electrically isolating the power supply circuit and the main control circuit, can prevent the direct connection of high-voltage alternating current and the main control circuit when alternating current transmission inputs high voltage, and can further perform reliable isolation control on the switching device. When the alternating current transmission circuit works abnormally, the alarm circuit gives an alarm.

Referring to fig. 8, a second embodiment of the present invention provides a socket 3, which includes a socket body 31 and a circuit structure 32 disposed in the socket body 31, wherein the circuit structure 32 is the ac power transmission circuit 1 in the first embodiment.

It can be understood that the second embodiment of the present invention provides a socket 3, which has the same effect as the ac power transmission circuit 1 in the first embodiment, and the description thereof is omitted here.

1. the embodiment of the utility model provides an alternating current transmission circuit, including power supply circuit with be coupled in protection circuit on the power supply circuit, protection circuit includes master control circuit, surge detection circuit and concatenates the switching device on power supply circuit, master control circuit and switching device signal connection and the break-make through switching device control power supply circuit. By the design of coupling the switching device on the power supply circuit, the problem that the ignition phenomenon is easily generated at the switch in the alternating current transmission circuit is effectively avoided, so that the safety and the reliability of the alternating current transmission circuit are improved. In addition, the design of controlling the on-off of the alternating current transmission circuit through the switch device enables the service life of the protection circuit in the alternating current transmission circuit to be longer, and therefore the service life of the protection circuit of the alternating current transmission circuit is prolonged. In addition, the protection circuit further comprises a surge detection circuit, so that the high-voltage surge and lightning stroke input by the power supply circuit can be detected abnormally, firstly, the internal element can be prevented from being damaged when external voltage is abnormal, the normal work of the alternating current transmission circuit is ensured, secondly, the power supply circuit and the protection circuit can be electrically isolated through the transformer, and further the safety of the alternating current transmission circuit is improved.

4. The embodiment of the utility model provides an alternating current transmission circuit, protection circuit still include AC voltage detection circuit, and AC voltage detection circuit can detect the voltage value of power supply circuit input. In addition, when the AC voltage detection circuit detects that the voltage input by the power supply circuit is within the preset voltage threshold range, the main control circuit controls the switch device to be connected, and normal power supply of the power supply circuit is guaranteed. When the main control circuit judges that the AC voltage detection circuit detects that the voltage input by the power supply circuit is out of the preset voltage threshold range, namely the voltage input by the power supply circuit is abnormal, at the moment, the main control circuit controls the switching device to be switched off, and then the power supply circuit is controlled to stop supplying power. Through the design of the main control circuit and the AC voltage detection circuit, the safety and the reliability of the AC power transmission circuit are further ensured.

6. The embodiment of the utility model provides an alternating current transmission circuit, protection circuit include switch isolation control circuit, and main control circuit controls switching device through switch isolation control circuit, can electrical isolation supply circuit and main control circuit, and then avoids damage main control circuit such as surge voltage among the supply circuit to alternating current transmission circuit's life-span has been prolonged. In addition, the design of electrically isolating the power supply circuit from the main control circuit can prevent high-voltage alternating current from being directly connected with the main control circuit, so that the safety of manually controlling the on-off of the alternating current transmission circuit by a user is further improved. In addition, the switch isolation control circuit comprises an optical coupler, so that the reliable isolation control of the main control circuit on the switch device is further ensured, and the main control circuit is safer and more reliable.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An alternating current power transmission circuit characterized by: the alternating current power transmission circuit comprises a power supply circuit and a protection circuit coupled to the power supply circuit;

2. An alternating current transmission circuit according to claim 1, wherein: the surge detection circuit comprises a voltage dependent resistor, and the voltage dependent resistor is connected with the power supply circuit.

3. An alternating current power transmission circuit according to claim 2, wherein: the primary coil of the transformer is connected with the power supply circuit through a piezoresistor, and the secondary coil of the transformer is connected with the main control circuit.

4. An alternating current transmission circuit according to claim 1, wherein: the switching device is one or a combination of more of a bidirectional thyristor, a relay and an MOS tube.

5. An alternating current transmission circuit according to claim 1, wherein: the protection circuit further comprises an AC voltage detection circuit, the AC voltage detection circuit is connected with the power supply circuit to detect the voltage of the power supply circuit, and the output end of the AC voltage detection circuit is connected with the main control circuit.

6. An alternating current transmission circuit according to claim 5, wherein: when the input voltage of the power supply circuit is within a preset voltage threshold range, the main control circuit controls the switching device to be communicated.

7. An alternating current transmission circuit according to claim 6, wherein: the preset voltage threshold is 90V-250V.

8. An alternating current transmission circuit according to claim 1, wherein: the protection circuit further comprises a temperature detection circuit for detecting the temperature of the alternating current transmission circuit, and the temperature detection circuit is connected with the main control circuit.

9. An alternating current power transmission circuit according to claim 8, wherein: the temperature detection circuit detects the temperature of the switch device and feeds a detected temperature value back to the main control circuit, and the main control circuit controls the on-off of the switch device according to the detected temperature value.

10. An alternating current transmission circuit according to claim 1, wherein: the protection circuit further comprises a switch isolation control circuit, and the switch device is connected with the main control circuit through the switch isolation control circuit.

11. An alternating current transmission circuit according to claim 10, wherein: the switch isolation control circuit comprises an optocoupler.

12. An alternating current transmission circuit according to claim 1, wherein: the protection circuit further comprises an alarm circuit, and the main control circuit is in signal connection with the alarm circuit and controls the alarm circuit to alarm.

13. A socket, characterized by: comprising a socket body and a circuit arrangement arranged in said socket body, said circuit arrangement being an alternating current transmission circuit according to any one of claims 1-12.