Zero-power-consumption standby intelligent socket and method

Abstract

The invention relates to the technical field of power circuit design, in particular to a zero-power-consumption standby intelligent socket and a method. The circuit comprises a signal detection circuit, a zero-power-consumption standby power supply circuit, a control circuit and a starting circuit of electrical equipment, and the intelligent socket is mainly used for judging whether a user exists nearby or not through a low-power-consumption radar so as to enter a zero-power-consumption operation state under the condition that no user exists; in the using process, the starting mode is that the relay of the intelligent socket is started to achieve power supply and then the electric appliance is started through delayed signaling, and the closing mode is that the electric appliance is closed firstly and then the relay in the intelligent socket is closed through delayed signaling. According to the zero-power-consumption standby power supply circuit, after it is detected that a user leaves a detection range, only the low-power-consumption signal detection circuit is kept to supply power, other parts are disconnected from the power supply, standby electric energy loss is reduced on the premise that normal use of electric appliances is guaranteed, and energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply circuit design, in particular to a zero-power standby intelligent socket and a method. Background Art

[0002] In the prior art, a Chinese invention patent application (publication number CN112510446A) discloses an intelligent voice socket and a control method for infrared-controlled electrical appliances. The socket includes a socket bottom cover and a light-transmitting mask made of a material that can transmit infrared light, etc. The socket bottom cover and the light-transmitting mask are together enclosed to form a containing space. The light-transmitting mask is provided with an installation port for placing a socket panel. The socket bottom cover and the socket panel are both made of high-temperature resistant and flame-retardant materials. The hardware circuit part is arranged in the containing space, including an infrared emitting tube and a voice recognition control module. The socket is used as an auxiliary device to realize voice control of various infrared-controlled electrical appliances, greatly improving the user experience; the mask can realize infrared penetration, and the central area shell of the socket bottom cover, the socket panel, etc. that needs to be connected to the metal parts is made of flame-retardant material, so that infrared penetration can be realized and safety requirements can be met; further, the mask and the bottom cover are assembled in an upper and lower buckle manner, and the process cost is greatly reduced; the connection part between the bottom cover and the pin greatly improves the production efficiency compared with injection molding. This invention realizes the control of the electrical appliances connected to the socket by inputting voice commands into the socket, reducing the tedious process of voice control of each smart device in turn. At the same time, the socket integrating this circuit can also enable some electrical appliances that originally do not have intelligent control effects to achieve intelligent voice control; however, this invention still has major defects. When realizing intelligent control, not only the standby power consumption of the original electrical appliances exists, but also the power consumption of the offline voice recognition module and infrared control module of the smart socket itself is increased, which further increases the overall standby power consumption. Nowadays, the problem of standby power consumption is becoming more and more serious, so there is an even greater need for a socket that can reduce standby power consumption and achieve intelligent control at the same time.

[0003] International Electrotechnical Commission (IEC) 62301:2011 specifies methods for measuring electrical energy consumption in standby and related low-power modes (off mode and network mode). These methods apply to electrical products with a voltage range that is fully or partially between 100V AC and 250VAC (single-phase products) and 130V AC (alternating current) and 480V AC (other products). Clause 4.5 of IEC 62301:2011 classifies measurements of less than 5mW as zero power, which is now the basis of the zero power marketing campaign as a target for no-load standby power consumption in electronic equipment and appliances. Products that meet this IEC requirement can obtain a zero power label, so achieving zero power consumption in the sense of the label can greatly reduce the power consumption generated by everyday electrical standby. Summary of the invention

[0004] In order to overcome the problem that the prior art cannot take into account both intelligent control and zero-power standby and lacks zero-power standby solutions for household high-power appliances, the present invention proposes a zero-power standby smart socket and method based on a technology that combines low-power wireless detection and cooperates with two-level working voltage. The low-power radar is used to determine whether the user is in the detection range, so as to realize a zero-power smart socket that only maintains the low-power radar after the user leaves the range.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] On the one hand, a zero-power standby smart socket includes a signal detection circuit, a zero-power standby power circuit, a control circuit, and a start-up circuit for an electrical device.

[0007] The signal detection circuit uses a wireless detection method to obtain a power-on start signal;

[0008] The power input end of the signal detection circuit is connected to the zero-power consumption power circuit, the signal input end of the signal detection circuit is connected to the load detection circuit in the control circuit, and the output end of the signal detection circuit is connected to the zero-power consumption power circuit;

[0009] The zero-power standby power supply circuit turns on the first working voltage according to the power-on start signal; the zero-power standby power supply circuit also provides microampere-level current power supply to the signal detection circuit;

[0010] The control circuit outputs a second working voltage according to the first working voltage, the second working voltage is used to supply power to a starting circuit of the electrical device, and the starting circuit is used to control the power switch of the AC device to be turned on;

[0011] The control circuit is used to control the working state of the signal detection circuit, control the electrical appliances connected to the zero-power standby smart socket, and maintain the power-on state of the second working voltage;

[0012] The control circuit includes an infrared control circuit, a voice control circuit and a load detection circuit;

[0013] The infrared control circuit includes an infrared transmitting circuit and an infrared receiving circuit;

[0014] The voice control circuit includes a sound pickup circuit, a voice control circuit, and a speaker circuit;

[0015] The voice control circuit turns on the switch according to the electrical signal output by the pickup circuit to start the second working voltage;

[0016] The infrared control circuit turns on the switch according to the electrical signal output by the infrared receiving circuit to start the second working voltage;

[0017] The signal output end of the voice control circuit is connected to the infrared control circuit;

[0018] The load detection circuit detects the on / off of the AC power switch of the electrical device through a load detection signal. If the AC power switch of the electrical device is in the on state, the load detection circuit outputs a switch normally open maintenance signal to the start-up circuit to control the start-up circuit to be turned on, so as to maintain the power-on state of the second working voltage;

[0019] The output end of the load detection circuit in the control circuit is connected to the signal detection circuit, the voice control circuit and the infrared control circuit, and the input end of the load detection circuit is connected to the AC device power switch.

[0020] Preferably, the load detection circuit includes a switch K2, a bridge DB2, a transistor 2Q4, voltage-stabilizing diodes 2D5 and 2D6, a diode 2D3, electrolytic capacitors 2C17 and 2C19, capacitors 2C16, 2C18, 2C20 and 2C21, and resistors 2R28, 2R29, 2R30, 2R31 and 2R32;

[0021] The switch K2 is connected between the input and output ends of the AC working voltage of the electrical equipment, and is used to control the AC working voltage of the electrical equipment to be turned on or off; the first port of the bridge stack DB2 is connected to the input end of the AC working voltage, the second port of the bridge stack BD2 is connected to the output end of the AC working voltage, the third port of the bridge stack DB2 is connected to the base and collector of the transistor 2Q4, and is used to convert the AC working voltage of the electrical equipment into a DC voltage, and the fourth port of the bridge stack BD2 is grounded; the base of the transistor 2Q4 is connected to the third port of the bridge stack DB2 through the resistor 2R31, and the emitter of the transistor 2Q4 is grounded through the electrolytic capacitor 2C19, and the capacitor 2C21 and the resistor 2R32 are also connected in parallel at both ends of the electrolytic capacitor 2C19. The emitter of transistor 2Q4 is connected to the signal detection circuit and the zero-power standby power supply circuit through a diode 2D3; a capacitor 2C20 is also connected in parallel between the emitter and the collector of transistor 2Q4, the base of transistor 2Q4 is grounded through a voltage-stabilizing diode 2D5, the voltage-stabilizing diode 2D5 is connected in series with a resistor 2R30 and connected between the third port of bridge stack DB2 and the ground, an electrolytic capacitor 2C17 and a capacitor 2C18 are also connected in parallel between the third port of bridge stack DB2 and the ground, a capacitor 2C15 is also connected in series between the first port of bridge stack DB2 and the input end of the AC working voltage, a resistor 2R28 is also connected in parallel between the capacitors 2C15, and a resistor 2R29 is connected in series between the second port of bridge stack DB2 and the output end of the AC working voltage.

[0022] Preferably, the signal detection circuit specifically adopts a radar detection method, including a radar detection sensor 2U3, a light emitting diode LED1, a diode 2D2, and resistors 2R24 and 2R25;

[0023] The output end of the radar detection circuit is connected to the diode 2D2, and the output end is grounded through a resistor 2R24 and a light emitting diode LED1. A resistor 2R25 is also connected in parallel between the output end and the ground end.

[0024] Further preferably, after the radar arranged in the signal detection circuit detects that there is no user within the detection range within the detection time, it will send a standby signal to the control circuit so that the entire smart socket and the electrical appliances connected to the socket enter a zero-power standby state.

[0025] Further preferably, the radar selected for the signal detection circuit is a low-power radar, and the power consumption in the working state is less than 5mW.

[0026] Preferably, the output end of the zero-power standby power supply circuit is connected to the gate of the field effect transistor Q52 through a resistor R55, and the gate of the field effect transistor Q52 is controlled to control the conduction of the source and drain of the field effect transistor Q52 to output the first operating voltage.

[0027] Preferably, the operating voltage of the signal detection circuit is lower than the first operating voltage.

[0028] Preferably, the starting circuit of the electrical equipment adopts a voice control circuit or an infrared control circuit;

[0029] After receiving the second working voltage power supply, the voice control circuit controls the AC power supply switch of the electrical equipment to be turned on; the voice control circuit includes a pickup circuit, a voice recognition circuit and a speaker circuit, specifically including a voice control chip 2U1, a speaker chip 2U2, a pickup MIC, a speaker SPK, a transistor 2Q2, a diode 2D1, a transient voltage suppression diode TVS, a relay J2, a ceramic capacitor X1, capacitors 2C1, 2C2, 2C3, 2C4, 2C5, 2C6, 2C7, 2C8, 2C9, 2C11, 2C12, 2C14, 2C15 resistors 2R1, 2R2, 2R5, 2R9, 2R10;

[0030] The positive electrode of the microphone MIC is connected to the input port MICBIAS of the voice control chip 2U1 through a resistor 2R1, the microphone MIC is connected to the input port MICPL of the voice control chip 2U1 through a capacitor 2C7, and the negative electrode of the microphone MIC is connected to the input port MICNL of the voice control chip 2U1 through a capacitor 2C8; the input end of the speaker SPK is connected to the output end of the speaker chip 2U2, the input end SHUT of the speaker chip 2U2 is connected to the PAEN end of the voice control chip 2U1, and the port VREF of the speaker chip 2U2 is connected in series with the port +IN The output end of the voice control chip 2U1 is also connected to the base of the transistor 2Q2 through a resistor 2R21. The working voltage is connected to the base of the transistor 2Q2 through a resistor 2R22 in series with the resistor 2R21. The emitter of the transistor 2Q2 is grounded. The relay J2 and the resistor 2R23 are connected in series and connected between the collector of the transistor 2Q2 and the second working voltage. A diode 2D1 is also connected in parallel at both ends of the relay J2.

[0031] Preferably, the zero-power standby power supply circuit includes a first control chip U1, a second control chip U51, a rectifier circuit, a transformer, a MOS tube Q1, a MOS tube Q4, a MOS tube Q51, a MOS tube Q52 and a MOS tube Q53.

[0032] The rectifier circuit is connected to the primary side of the transformer, and the secondary side of the transformer serves as a DC voltage output terminal, and is used to convert the input AC voltage into the DC voltage required by the signal detection circuit, and is also used to output the first working voltage;

[0033] The first control chip U1 outputs a PWM signal to the MOS tubes Q1 and Q4. The on and off of the MOS tubes Q1 and Q4 control the magnetic flux density of the primary side of the transformer, thereby reducing the power output of the primary side of the transformer. The second controller outputs a switch signal to the MOS tubes Q51 and Q52. The on and off of the MOS tubes Q1 and Q4 control the output and shutdown of the first working voltage of the secondary side of the transformer.

[0034] On the other hand, the control method of the zero-power standby smart socket specifically includes the following steps:

[0035] S1, the signal detection circuit detects that the user enters the use range, the signal detection circuit feeds back a signal to the smart socket, and the smart socket enters the working standby state;

[0036] S2, starting the smart socket through the control circuit, controlling the relay in the starting circuit to turn on, and the smart socket enters the working state, and the control circuit delays sending a signal to the electrical appliance connected to the smart socket, and the electrical appliance starts to enter the working state;

[0037] S3, turning off the appliance connected to the smart socket through the control circuit, the control circuit delays sending a signal to the start circuit, controls the relay in the start circuit to turn off, and the smart socket enters a working standby state;

[0038] S4: The signal detection circuit detects that the user leaves the usage range. After the detection time, the signal detection circuit feeds back a signal to the smart socket, and the smart socket enters a zero-power standby state.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] Compared with the prior art, the zero-power standby smart socket of the present invention not only realizes the function of controlling the connected electrical appliances by voice control infrared, but also realizes zero-power standby under the International Electrotechnical Commission standard by designing a two-stage circuit. It not only solves the standby power consumption generated by the socket's own circuit, but also realizes zero-power standby for the electrical appliances connected to the socket by isolating the two-stage circuit from each other.

[0041] In addition, the present invention also realizes the intelligent switching between the working state of intelligent control and the zero-power standby state, and uses a low-power radar to detect whether the user is in the use range to determine whether it is necessary to enter the working state. On the basis of the original intelligent control socket, the present invention realizes more flexible state switching and zero-power standby operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a principle block diagram of the zero-power standby smart socket and method in Example 1;

[0043] Figure 2 It is a schematic diagram of a zero-power standby power supply circuit and a signal detection circuit in a zero-power standby smart socket in Example 1;

[0044] Figure 3 This is a circuit schematic diagram of other parts of Example 1 except for the zero-power standby power supply circuit and the signal detection circuit. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with the examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following examples, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0046] Example 1

[0047] like Figure 1 As shown, a zero-power standby smart socket circuit includes a signal detection circuit, a zero-power standby power supply circuit, a control circuit and a start-up circuit of an electrical device;

[0048] The signal detection circuit uses a wireless detection method to obtain a power-on start signal;

[0049] The power input end of the signal detection circuit is connected to the zero-power consumption power circuit, the signal input end of the signal detection circuit is connected to the load detection circuit in the control circuit, and the output end of the signal detection circuit is connected to the zero-power consumption power circuit;

[0050] The zero-power standby power supply circuit turns on the first working voltage according to the power-on start signal; the zero-power standby power supply circuit also provides microampere-level current power supply to the signal detection circuit;

[0051] The control circuit outputs a second working voltage according to the first working voltage, the second working voltage is used to supply power to a starting circuit of the electrical device, and the starting circuit is used to control the power switch of the AC device to be turned on;

[0052] The control circuit is used to control the working state of the signal detection circuit, control the electrical appliances connected to the zero-power standby smart socket, and maintain the power-on state of the second working voltage;

[0053] The control circuit includes an infrared control circuit, a voice control circuit and a load detection circuit;

[0054] The infrared control circuit includes an infrared transmitting circuit and an infrared receiving circuit;

[0055] The voice control circuit includes a sound pickup circuit, a voice recognition circuit, and a speaker circuit;

[0056] The voice control circuit turns on the switch according to the electrical signal output by the pickup circuit to start the second working voltage;

[0057] The infrared control circuit turns on the switch according to the electrical signal output by the infrared receiving circuit to start the second working voltage;

[0058] The signal output end of the voice control circuit is connected to the infrared control circuit;

[0059] The load detection circuit detects the on / off of the AC power switch of the electrical device through a load detection signal. If the AC power switch of the electrical device is in the on state, the load detection circuit outputs a switch normally open maintenance signal to the start-up circuit to control the start-up circuit to be turned on, so as to maintain the power-on state of the second working voltage;

[0060] The output end of the load detection circuit in the control circuit is connected to the signal detection circuit, the voice control circuit and the infrared control circuit, and the input end of the load detection circuit is connected to the AC device power switch.

[0061] The circuit is designed in a hierarchical manner, and the power supply and control are isolated in order to achieve zero power consumption (the standby power consumption that meets the International Electrotechnical Commission standard is less than 5mW). The zero-power power supply circuit designed in the existing technical solution can only be used in low-voltage DC circuits and cannot be directly applied to AC high-voltage circuits (usually used in mobile phone chargers, but 220V AC high-power household appliances cannot be used). If the standby power consumption is to be controlled below 5mW, the zero-power standby power supply circuit itself and the supporting signal detection circuit, control circuit, etc. need to select low-power devices. However, due to its insufficient driving force, the power supply circuit composed of low-power devices is difficult to apply to most household appliances in actual application scenarios. Therefore, the zero-power control of the socket, which is the starting end of the current electrical power supply, has strong practical applicability.

[0062] The present invention makes improvements on the limitations faced by the current prior art. It adopts a two-stage voltage cascade. In the process of switching from the standby state to the working state, a small voltage is used to turn on a large voltage. At the same time, the start-up circuit control circuit and the signal detection circuit are isolated, so that when the signal detection circuit detects that no one is in the use range, it is in the standby state. At the same time, only the signal detection circuit is running in the standby state, thereby achieving zero standby power consumption; after the signal detection circuit detects that the user enters the use range, a power-on signal is sent to the power circuit, and the control circuit is connected to the first working voltage. After receiving the start-up signal of the voice control circuit or the infrared control circuit, the relay in the socket is first started to enable it to have power supply capability, and then the appliance is powered. In this process, the signal detection circuit uses a low-power radar detection device to realize the trigger from the standby state to the working state. The trigger condition is that when it is detected that a user has entered the use range, a power-on start signal is sent to the power circuit, so that the power circuit no longer only supplies power to the low-power radar, but also supplies power to the voice control circuit and the infrared control circuit to put them into the working state; when the voice control circuit or the infrared control circuit sends a start signal to the power circuit, the start circuit is connected to the second working voltage. At this time, the intelligent control switch outputs a high level, turns on the transistor, the transistor attracts the switch, the relay in the starter opens, and controls the AC power supply switch of the electrical equipment to turn on. At this point, the state switching of the electrical equipment from zero power standby to AC power supply startup is realized.

[0063] Furthermore, it also includes a load detection circuit, which has the function of detecting whether the socket is in a load state and providing signal feedback thereto. As long as the load detection circuit detects that the electrical device is in a working state, the second working voltage is kept powered on continuously to maintain the electrical device in a powered-on working state. The principle is that, as a low-power device, the trigger signal output by the signal detection circuit does not always exist, and the trigger signal can only be maintained for a certain period of time (for example, converted from a high level to a low level). When the trigger signal disappears, two situations will occur: the first situation is that because the trigger signal disappears, the load detection circuit cannot continue to output the working inhibition signal to the signal detection circuit, causing the detection circuit to regain the ability to control the power circuit. After the user leaves the usage range for more than the detection time, the zero-power standby smart socket will enter the standby state; the second situation is that since the disappearance of the trigger signal will cause the first working voltage to be zero, the switch will change from the attracted state to the off state, causing the second working voltage to be zero, and the electrical equipment will stop working. Therefore, if the load detection circuit detects that the AC power supply switch of the electrical equipment is in the on state through the load detection signal, the load detection circuit outputs a high level to the transistor in the switch circuit, so that the transistor is in the on state, maintaining the attracted state of the switch, thereby maintaining the power-on state of the second working voltage.

[0064] Example 2

[0065] like Figure 2-Figure 3 As shown, a zero-power standby power supply control circuit schematic diagram includes a signal detection circuit, a zero-power standby power supply circuit, a control circuit and a start-up circuit;

[0066] The signal detection circuit uses a wireless detection method to obtain the power-on start signal; the zero-power standby power circuit supplies power to the signal detection circuit (the detection circuit power supply voltage is Figure 2 The detection circuit in is connected to VCC, specifically 3.3V);

[0067] The zero-power standby power supply circuit turns on the first working voltage according to the start signal ( Figure 3 The pickup circuit, voice control circuit, speaker circuit, and infrared receiving circuit are connected to the first working voltage, which is Figure 3 +5V in the

[0068] The control circuit provides a second operating voltage according to the first operating voltage ( Figure 3 The voltage connected to the resistor 2R23 is a second working voltage, which is +5V), and the second working voltage is used to power the start-up circuit of the electrical equipment; the control circuit includes a voice control circuit, an infrared control circuit and a load detection circuit;

[0069] The load detection circuit is used to maintain a power-on state of the second working voltage according to the working state of the electrical device.

[0070] In the prior art, the design idea of ​​most zero-power standby power supply circuits is to start the DC power switch. When it is disconnected, the zero-power standby power supply circuit adopts ultra-low power consumption standby. When it is turned on, it directly powers the electrical appliance. The disadvantage is that this solution is only applicable to DC power supply and cannot be used for AC power supply and daily high-power household appliances. This solution uses a two-stage circuit architecture to design a socket that can be applied to most electrical appliances on the basis of providing direct power supply by the zero-power standby power supply circuit. By isolating the primary and secondary circuits, only the primary circuit is running in standby mode. In the working state, the primary circuit turns on the secondary circuit through the first working voltage, and the secondary circuit outputs the second working voltage to act on the starting circuit to turn on the circuit to control the high-power power supply to work.

[0071] The signal detection circuit uses a low-power radar, model FR58L4LS-2020M-3 (or FR58L4LS-3216D-2). In the standby state, only the signal detection circuit of the entire socket and the connected electrical appliances is in working state, and the total standby power consumption is less than 5mW, which meets the zero power consumption standard of the International Electrotechnical Commission. In addition, the output end of the signal detection circuit is connected to the gate of the field effect transistor Q53, the source of the field effect transistor Q53 is connected to the output enable end of the zero power standby power supply circuit, the drain of the field effect transistor Q53 is grounded, and a voltage regulator diode ZD52 is also connected in parallel between the source and drain of the field effect transistor Q53.

[0072] Optimized, since the power-on start signal output by the signal detection circuit cannot be maintained for a long time, it is possible that when the power-on start signal disappears, the switch controlling the first voltage and the second voltage has not yet completed the cascade opening. Therefore, a delay program is built into the chip in the zero-power standby power supply circuit. The chip detects the power-on start signal, and the chip outputs a high-level start transistor, outputs the first working voltage, and starts the delay program at the same time, so that the high-level output time is maintained for a duration of T. During the duration of T, even if the power-on start signal disappears, the first working voltage still maintains the output state, thereby starting the second working voltage through the switch circuit. Preferably, the duration of T is 10 seconds, which is sufficient to ensure that the switch controlling the first working voltage and the second working voltage is turned on.

[0073] Furthermore, in order to avoid the situation where the user passes by and causes the socket to start by mistake, the zero-power standby smart socket adopts a two-stage circuit and a two-layer startup mechanism. After the signal detection circuit detects the user, it only starts the first-stage circuit to power the secondary circuit, so that the control circuit enters the working state and the startable state. Only when the voice control circuit or the infrared control circuit receives the start command will it output the second working voltage, and the startup circuit enters the working state to power the connected appliance. When the connected appliance has an infrared control module, the connected appliance can be started or shut down through the voice control circuit. Specifically, when turning on the appliance, a command to turn on the appliance is issued through the voice control circuit (for example, saying "turn on the air conditioner" or other voice commands to control the appliance). At this time, the zero-power standby smart socket will be started first to power the appliance, putting it into standby state. After the socket is started, the start signal is delayed to the connected appliance through the infrared transmitting circuit, and the appliance is started; when turning off the appliance, a command to turn off the appliance is issued through the voice control circuit. At this time, the voice control circuit will first issue a command to turn off the appliance to the infrared control circuit. After the appliance is turned off, the shutdown command is delayed to the zero-power standby smart socket, and the relay of the start circuit is turned off. In addition to voice control, the switch control of the electrical appliances connected to the zero-power smart socket can also be realized through infrared control. Specifically, when it is turned on, the infrared remote controller issues a command to turn on the electrical appliance. At this time, the infrared receiving circuit receives the signal and starts the zero-power standby smart socket to power the electrical appliance, so that it enters the standby state. After the socket is started, the infrared transmitting circuit sends a delayed start signal to the connected electrical appliance, and the electrical appliance starts at this time; when it is turned off, the infrared remote controller issues a command to turn off the electrical appliance, and the electrical appliance receives the shutdown signal and enters the standby state. At this time, the infrared receiving circuit of the zero-power smart socket also receives the shutdown signal, and the voice control circuit delays the closing of the start circuit relay. In these two working modes, the intelligent opening of electrical equipment is realized, and the strict classification of the shutdown command is realized, which well balances the needs of intelligent control and energy saving and consumption reduction, and avoids wasting energy and significantly increasing power consumption.

[0074] The specific model of chip 2U1 in the voice control circuit is CI-1302 (CI-130X series), and the specific model of chip 2U2 is FM8002; the specific model of chip U51 in the zero-power standby power supply circuit is REN_iW690, and the specific model of chip U1 is REN_iW9860.

[0075] Furthermore, it is also necessary to consider that when the AC-powered equipment is working, the first working voltage and the second working voltage must maintain a powered state and cannot be powered off. Once the power is off, two problems may arise: the detection circuit interferes with the control; the AC power start-up circuit loses the working power supply, the AC power stops supplying power, and the equipment stops working. In order to maintain the first working voltage and the second working voltage in a powered state, a load detection circuit is also designed.

[0076] The load detection circuit includes a switch K2, a bridge DB2, a transistor 2Q4, voltage-stabilizing diodes 2D5 and 2D6, a diode 2D3, electrolytic capacitors 2C17 and 2C19, capacitors 2C16, 2C18, 2C20 and 2C21, and resistors 2R28, 2R29, 2R30, 2R31 and 2R32;

[0077] The switch K2 is connected between the input and output ends of the AC working voltage of the electrical equipment, and is used to control the AC working voltage of the electrical equipment to be turned on or off; the first port of the bridge stack DB2 is connected to the input end of the AC working voltage, the second port of the bridge stack BD2 is connected to the output end of the AC working voltage, the third port of the bridge stack DB2 is connected to the base and collector of the transistor 2Q4, and is used to convert the AC working voltage of the electrical equipment into a DC voltage, and the fourth port of the bridge stack BD2 is grounded; the base of the transistor 2Q4 is connected to the third port of the bridge stack DB2 through the resistor 2R31, and the emitter of the transistor 2Q4 is grounded through the electrolytic capacitor 2C19, and the capacitor 2C21 and the resistor 2R32 are also connected in parallel at both ends of the electrolytic capacitor 2C19. The emitter of transistor 2Q4 is connected to the signal detection circuit and the zero-power standby power supply circuit through a diode 2D3; a capacitor 2C20 is also connected in parallel between the emitter and the collector of transistor 2Q4, the base of transistor 2Q4 is grounded through a voltage-stabilizing diode 2D5, the voltage-stabilizing diode 2D5 is connected in series with a resistor 2R30 and connected between the third port of bridge stack DB2 and the ground, an electrolytic capacitor 2C17 and a capacitor 2C18 are also connected in parallel between the third port of bridge stack DB2 and the ground, a capacitor 2C15 is also connected in series between the first port of bridge stack DB2 and the input end of the AC working voltage, a resistor 2R28 is also connected in parallel between the capacitors 2C15, and a resistor 2R29 is connected in series between the second port of bridge stack DB2 and the output end of the AC working voltage.

[0078] As long as the electrical equipment is in operation, there is a voltage drop between the input and output ends of the AC working voltage. The load detection circuit converts the voltage drop into a DC voltage through the bridge BD2, and turns on the transistor 2Q4, thereby controlling the base of the transistor 2Q2 to maintain a high level. The transistor 2Q2 is always turned on, and the relay J2 attracts K2, and the second working voltage is kept powered. The switch of the transistor 2Q2 needs to control the relay J2, while the switch of the transistor 2Q4 only controls a 5V low-power device. Therefore, when selecting, the power consumption of the transistor 2Q2 should be greater than that of the transistor 2Q4.

[0079] Preferably, the zero-power standby power supply circuit is composed of an ultra-low power consumption chip and its peripheral circuits. The output end of the detection circuit is connected to the gate of the field effect transistor Q52 through a resistor R55. The gate of the field effect transistor Q52 is controlled to control the conduction of the source and drain of the field effect transistor Q52. After the ultra-low power consumption chip detects the high level of the input, it outputs a high level signal to turn on Q52 to output the first working voltage. The first working voltage is powered on to turn on 2Q2, and the relay J2 is energized to power on the second working voltage.

[0080] In order to reduce standby power consumption, the operating voltage of the signal detection circuit is lower than the first operating voltage. For example, the operating voltage of the signal detection circuit is 3.3V, and the first operating voltage is 5V.

[0081] A zero-power standby power control method, using the above-mentioned zero-power standby smart socket and method, comprises the following steps:

[0082] S1, the signal detection circuit detects that the user enters the use range, the signal detection circuit feeds back a signal to the smart socket, and the smart socket enters the working standby state;

[0083] S2, starting the smart socket through the control circuit, controlling the relay in the starting circuit to turn on, and the smart socket enters the working state, and the control circuit delays sending a signal to the electrical appliance connected to the smart socket, and the electrical appliance starts to enter the working state;

[0084] S3, turning off the appliance connected to the smart socket through the control circuit, the control circuit delays sending a signal to the start circuit, controls the relay in the start circuit to turn off, and the smart socket enters a working standby state;

[0085] S4: The signal detection circuit detects that the user leaves the usage range. After the detection time, the signal detection circuit feeds back a signal to the smart socket, and the smart socket enters a zero-power standby state.

[0086] In order to avoid the situation where the user repeatedly starts and shuts down near the radar detection range, the detection circuit is set to enter the zero-power standby state only after detecting that the user has left and the detection time has passed. The detection time can be set to 0 to 60 minutes.

[0087] Finally, it should be noted that the embodiments described in detail above are only the best practices of the invention and cannot be used to limit the scope of rights of the invention. Equivalent replacement of the technical solutions recorded in the aforementioned embodiments does not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the invention, and they should all be included in the scope of the claims and description of the invention.

Claims

1. A zero-power standby smart socket, comprising a voice control circuit and an infrared control circuit, characterized in that: It also includes signal detection circuit, zero-power standby power circuit, control circuit, and start-up circuit of electrical equipment. The signal detection circuit uses a wireless detection method to send a power-on start signal; The power input end of the signal detection circuit is connected to the zero-power standby power circuit, the signal input end of the signal detection circuit is connected to the load detection circuit in the control circuit, and the signal output end of the signal detection circuit is connected to the zero-power standby power circuit; The zero-power standby power supply circuit turns on the first working voltage according to the power-on start signal; The zero-power standby power supply circuit also provides microampere-level current power supply to the signal detection circuit; The control circuit outputs a second working voltage according to the first working voltage, the second working voltage is used to power a starting circuit, and the starting circuit is used to control the power switch of the AC device to turn on; The control circuit is used to control the working state of the signal detection circuit, control the electrical appliances connected to the zero-power standby smart socket, and maintain the power-on state of the second working voltage; The control circuit includes an infrared control circuit, a voice control circuit and a load detection circuit; The infrared control circuit includes an infrared transmitting circuit and an infrared receiving circuit; The signal output end of the voice control circuit is connected to the infrared control circuit, and is used to send a signal to control the electrical appliance connected to the zero-power standby smart socket; The output end of the voice control circuit is connected to the input end of the start circuit for transmitting the second voltage, and the output end of the infrared control circuit is connected to the input end of the start circuit for transmitting the second working voltage; The load detection circuit detects the on / off of the AC power switch of the electrical device through a load detection signal. If the AC power switch of the electrical device is in the on state, the load detection circuit outputs a switch normally open maintenance signal to the start-up circuit to control the start-up circuit to be turned on, so as to maintain the power-on state of the second working voltage; The signal output end of the load detection circuit is connected to the signal detection circuit for suppressing the working signal; the signal output end of the load detection circuit is also connected to the signal input ends of the voice control circuit and the infrared control circuit for outputting a normally open maintenance signal; the signal input end of the load detection circuit is connected to the AC equipment power switch for receiving a load detection signal.

2. A zero-power standby smart socket as claimed in claim 1, characterized in that: The load detection circuit includes a switch K2, a bridge DB2, a transistor 2Q4, a voltage regulator diode 2D5, a voltage regulator diode 2D6, a diode 2D3, an electrolytic capacitor 2C17, an electrolytic capacitor 2C19, a capacitor 2C16, a capacitor 2C18, capacitors 2C20, 2C21, a resistor 2R28, a resistor 2R29, a resistor 2R30, a resistor 2R31, and a resistor 2R32; The switch K2 is connected to the power switch of the AC device, and is used to control the power switch of the AC device to be turned on or off; the first port of the bridge stack DB2 is connected to the power switch of the AC device, the second port of the bridge stack BD2 is connected to the output end of the AC working voltage, the third port of the bridge stack DB2 is connected to the base and collector of the transistor 2Q4, and is used to convert the AC working voltage of the electrical equipment into a DC voltage, and the fourth port of the bridge stack BD2 is grounded; the base of the transistor 2Q4 is connected to the third port of the bridge stack DB2 through the resistor 2R31, the emitter of the transistor 2Q4 is grounded through the electrolytic capacitor 2C19, and the capacitor 2C21 and the resistor 2R32 are also connected in parallel at both ends of the electrolytic capacitor 2C19, and the emitter of the transistor 2Q4 is connected to the ground. It is connected to the signal detection circuit and the zero-power standby power supply circuit through a diode 2D3; a capacitor 2C20 is also connected in parallel between the emitter and the collector of the transistor 2Q4, the base of the transistor 2Q4 is grounded through a voltage-stabilizing diode 2D5, the voltage-stabilizing diode 2D5 is connected in series with a resistor 2R30 and then connected between the third port of the bridge stack DB2 and the ground, an electrolytic capacitor 2C17 and a capacitor 2C18 are also connected in parallel between the third port of the bridge stack DB2 and the ground, a capacitor 2C15 is also connected in series between the first port of the bridge stack DB2 and the input end of the AC working voltage, a resistor 2R28 is also connected in parallel between the capacitors 2C15, and a resistor 2R29 is connected in series between the second port of the bridge stack DB2 and the output end of the AC working voltage.

3. The zero-power standby smart socket according to claim 1, characterized in that: The signal detection circuit specifically adopts a radar detection method, including a radar detection sensor 2U3, a light emitting diode LED1, a diode 2D2, a resistor 2R24, and a resistor 2R25; The output end of the radar detection circuit is connected to the diode 2D2, and the output end is grounded through a resistor 2R24 and a light emitting diode LED1 connected in series. A resistor 2R25 is also connected between the output end and the ground end.

4. A zero-power standby smart socket as claimed in claim 3, characterized in that: The signal detection circuit sets a detection time, and enters a zero-power standby state when it detects that there is no user within the range. Specifically, the detection time is set to 0 to 60 minutes.

5. The zero-power standby smart socket according to claim 3, characterized in that: The signal detection circuit adopts a low-power detection radar, and the low-power detection radar consumes less than 5mW of power in a working state.

6. The zero-power standby smart socket according to claim 1, characterized in that: The output end of the zero-power standby power supply circuit is connected to the gate of the field effect transistor Q52 through the resistor R55, and the gate of the field effect transistor Q52 is controlled to control the conduction of the source and drain of the field effect transistor Q52 to output the first working voltage.

7. The zero-power standby smart socket according to claim 1, characterized in that: The operating voltage of the signal detection circuit is lower than the first operating voltage.

8. A zero-power standby smart socket as described in claims 1-7, characterized in that: The starting circuit of the electrical equipment adopts a voice control circuit and / or an infrared control circuit; After receiving the second working voltage power supply, the voice control circuit controls the AC power supply switch of the electrical equipment to be turned on; the voice control circuit includes a pickup circuit, a voice recognition circuit and a speaker circuit, specifically including a voice control chip 2U1, a speaker chip 2U2, a pickup MIC, a speaker SPK, a transistor 2Q2, a diode 2D1, a transient voltage suppression diode TVS, a relay J2, a ceramic capacitor X1, capacitors 2C1, 2C2, 2C3, 2C4, 2C5, 2C6, 2C7, 2C8, 2C9, 2C11, 2C12, 2C14, 2C15 resistors 2R1, 2R2, 2R5, 2R9, 2R10; The positive electrode of the microphone MIC is connected to the input port MICBIAS of the voice control chip 2U1 through a resistor 2R1, the microphone MIC is connected to the input port MICPL of the voice control chip 2U1 through a capacitor 2C7, and the negative electrode of the microphone MIC is connected to the input port MICNL of the voice control chip 2U1 through a capacitor 2C8; the input end of the speaker SPK is connected to the output end of the speaker chip 2U2, the input end SHUT of the speaker chip 2U2 is connected to the PAEN end of the voice control chip 2U1, and the port VREF of the speaker chip 2U2 is connected in series with the port +IN The output end of the voice control chip 2U1 is also connected to the base of the transistor 2Q2 through a resistor 2R21. The working voltage is connected to the base of the transistor 2Q2 through a resistor 2R22 in series with the resistor 2R21. The emitter of the transistor 2Q2 is grounded. The relay J2 and the resistor 2R23 are connected in series and connected between the collector of the transistor 2Q2 and the second working voltage. A diode 2D1 is also connected in parallel at both ends of the relay J2.

9. The zero-power standby smart socket according to claim 1, characterized in that: The zero-power standby power supply circuit includes a first control chip U1, a second control chip U51, a rectifier circuit, a transformer, a MOS tube Q1, a MOS tube Q4, a MOS tube Q51, a MOS tube Q52 and a MOS tube Q53. The rectifier circuit is connected to the primary side of the transformer, and the secondary side of the transformer serves as a DC voltage output terminal, and is used to convert the input AC voltage into the DC voltage required by the signal detection circuit, and is also used to output the first working voltage; The first control chip U1 outputs a PWM signal to the MOS tubes Q1 and Q4. The on and off of the MOS tubes Q1 and Q4 control the magnetic flux density of the primary side of the transformer, thereby reducing the power output of the primary side of the transformer. The second controller outputs a switch signal to the MOS tubes Q51 and Q52. The on and off of the MOS tubes Q1 and Q4 control the output and shutdown of the first working voltage of the secondary side of the transformer.

10. A control method for a zero-power standby smart socket according to claim 1, characterized in that: The specific steps include: S1. The signal detection circuit detects that a user enters the usage range, and the signal detection circuit feeds back a signal to the zero-power standby smart socket, and the smart socket enters the working standby state; S2, starting the zero-power standby smart socket through the control circuit, controlling the start-up circuit to turn on, and the smart socket enters the working state, and the control circuit delays sending a signal to the electrical appliance connected to the smart socket, and the electrical appliance starts to enter the working state; S3, turning off the electrical appliance connected to the smart socket through the control circuit, the control circuit delays sending a signal to the start circuit, controls the start circuit to turn off, and the smart socket enters a working standby state; S4: The signal detection circuit detects that the user leaves the usage range. After the detection time, the signal detection circuit feeds back a signal to the smart socket, and the smart socket enters a zero-power standby state.

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