Wireless remote control switch and control method thereof

Abstract

The invention relates to a wireless remote control switch and a control method thereof, and belongs to the technical field of general electronics. Comprising an energy collector, an energy collection chip, a battery, a first power management circuit, a second power management circuit, a first load switch, a second load switch, a first relay, a second relay, a microcontroller, a wireless communication module, an input port and an output port. According to the invention, after the radio frequency energy collector collects energy to turn on the load switch, the load switch drives the relay to turn on, so that the external power supply drives the microcontroller and the load to work; the wireless remote control switch only has static power consumption of the first power management circuit when not receiving a remote control signal, so that a large amount of standby power consumption caused by long-time signal waiting of a load in a standby state can be avoided, and the service life of the wireless switch is greatly prolonged; through the design of the power supply management circuit, the system is adaptive to low-voltage, high-voltage, direct-current and alternating-current external power supplies, and can be applied to various scenes.

Description

Technical Field

[0001] The invention relates to a switch and a control method thereof, belonging to the field of general electronic technology. Background Art

[0002] Currently, most common wireless remote control switches on the market are implemented through infrared, Bluetooth, Lora and other communication technologies. These wireless remote control switches need to remain in standby mode for a long time and wait for external connections to achieve the function of remote control at any time. Therefore, in some applications with low switching frequency, standby power consumption becomes the main power consumption of the remote control switch. Standby power consumption limits the service life of the wireless remote control switch. Although equipping it with a large-capacity battery can extend its service life, it does not meet the high-integration application requirements of the wireless remote control switch.

[0003] Wireless radio frequency energy transmission is a new technology in recent years that can achieve long-distance wireless energy transmission. Due to the large spatial loss of radio frequency energy and the low energy transmission efficiency, its application is limited. Currently, there are no products and methods on the market that can achieve wireless remote control.

[0004] Therefore, there is an urgent need to propose a wireless remote control switch and a control method thereof to solve the above technical problems. Summary of the invention

[0005] To solve the above problems, a wireless remote control switch and a control method thereof are provided. A brief summary of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this summary is not an exhaustive summary of the present invention. It is not intended to determine the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0006] The technical solution of the present invention:

[0007] A wireless remote control switch comprises an energy collector, an energy collection chip, a battery, a first power management circuit, a second power management circuit, a first load switch, a second load switch, a first relay, a second relay, a microcontroller, a wireless communication module, an input port and an output port, wherein the input port is respectively connected to the first power management circuit, the first relay and the second relay, the first power management circuit input is connected to the battery output, the first power management circuit output is connected to the first relay input through the first load switch, the energy collection chip input is connected to the first relay output, the energy collection chip output is respectively connected to the microcontroller, the wireless communication module and the second load switch, the second relay input is connected to the second load switch, the second relay output is connected to the output port, the microcontroller is connected to the wireless communication module, the microcontroller output is connected to the second load switch input, the microcontroller and the energy collection chip arranged in parallel are connected to the first load switch input, the microcontroller can realize switch control of the first load switch and the second load switch, and realize communication with the wireless communication module to obtain control instructions of the remote control, and the energy collection chip is connected to the energy collector.

[0008] Preferably, the energy collection chip output and the microcontroller control signal are connected in parallel to the first load switch through two diodes to achieve switch control of the first load switch.

[0009] Preferably: the energy collector adopts a radio frequency energy collector, the energy collector is connected to the remote control for receiving remote control start energy, the wireless communication module is connected to the remote control for receiving remote control signals, the input port is connected to the power supply, and the output port is connected to the load. The solid line in the figure is the function or power supply connection, and the dotted line is the signal connection.

[0010] Preferably: the first power management circuit comprises a double-pole double-throw switch and an AC / DC compatible step-down circuit, a terminal ③ on one side of the double-pole double-throw switch is connected to an external power input port, and a terminal ① on one side is connected to a battery input port;

[0011] The terminal ⑥ on the other side of the double-pole double-throw switch is connected to the AC / DC compatible step-down circuit, the terminal ④ on the other side of the double-pole double-throw switch and the AC / DC compatible step-down circuit are connected in parallel to the first load switch, the AC / DC compatible step-down circuit in the first power management circuit includes a single-pole double-throw switch, a DC / DC circuit (BUCK-BOOST circuit) and an AC-DC circuit, the terminal ⑥ is electrically connected to the BUCK-BOOST circuit and the AC-DC circuit through the single-pole double-throw switch, the BUCK-BOOST circuit and the AC-DC circuit are both connected to the first load switch, and the double-pole double-throw switch terminal ⑥ is connected to the DC / DC circuit or the AC-DC circuit through the single-pole double-throw switch, so as to realize the switching of the BUCK-BOOST circuit and the AC-DC circuit.

[0012] Preferably: the second power management circuit has the same structure as the first power management circuit, the second power management circuit includes a single-pole double-throw switch, a BUCK-BOOST circuit and an AC-DC circuit, the connection method between the two ends (input end and output end) of the second power management circuit and other components is the same as that of the first power management circuit, the double-pole double-throw switch of the second power management circuit is connected to the first relay, the double-pole double-throw switch of the second power management circuit is connected to the second load switch, the microcontroller, and the wireless communication module, and the BUCK-BOOST circuit and the AC-DC circuit are both connected to the second load switch, the microcontroller, and the wireless communication module.

[0013] Preferably, the DC / DC circuit is a BUCK circuit; further, it is a BUCK-BOOST circuit, and the BUCK-BOOST circuit can be replaced with a BUCK circuit or other types according to actual application requirements; for an AC type external power supply, an AC-DC circuit should be used for rectification to provide a stable output to the second load switch, the microcontroller and the wireless communication module.

[0014] A control method of a wireless remote control switch, using the wireless remote control switch described above, for realizing remote control of power transmission between a power source and a load, comprising the following steps:

[0015] After external radio frequency energy is injected, the energy collection management chip turns on the first load switch, thereby turning on the first relay, and the second power management circuit is powered, thereby powering the microcontroller, the wireless communication module, and the second load switch;

[0016] According to the external remote control signal received by the wireless communication module, the microcontroller controls the second load switch to be turned on or off, and then controls the second relay to be turned on or off, thereby realizing the switch control from the power supply to the load end; according to the different signals sent by the remote control, flexible remote control switch control can be realized, such as timed switch, periodic switch, etc.

[0017] Preferably: the remote control is initiated by injecting external radio frequency energy of the remote controller into the energy collector. When the remote control is not initiated, the standby power consumption of a wireless remote control switch is only the static power consumption of the first power management circuit, and there is no waiting for connection power consumption.

[0018] Preferably: when the power supply is an external power supply that is sensitive to energy consumption (an external power supply that is sensitive to energy consumption refers to an external power supply used by devices that have high requirements on power quality and stability. Such devices generally include electronic devices that require high-precision voltage and current supply), for external power supplies that are more sensitive to energy consumption, the battery and the power supply are reviewed for energy management through a first power management circuit, and the battery is used for power supply. When the power supply is an external power supply that is insensitive to energy consumption, the power supply is used to power the first power management circuit for the external power supply that is insensitive to energy consumption.

[0019] Preferably: the input voltage of the input port can be high voltage or low voltage, the current can be AC ​​or DC, and the circuit structure of the first power management circuit and the second power management circuit can be adjusted according to the voltage state of the input port to achieve level conversion.

[0020] The present invention has the following beneficial effects:

[0021] 1. The present invention uses two relays instead of load switches to achieve switch control, which can cope with a wider range of voltage input (the load switch supply voltage range is very narrow), and has an extremely low shutdown current, reducing the static power consumption in the shutdown state;

[0022] 2. The first power management circuit of the present invention realizes the composite energy management from battery voltage to battery and external power input, and has high energy management flexibility; since the battery energy is only used to maintain the static power consumption of the first power management circuit and drive the opening relay, the energy loss is extremely low, so a small-capacity battery can also achieve ultra-long standby, thereby improving the integration of the wireless remote control switch;

[0023] 3. The present invention improves energy utilization and prevents current backflow by designing and adding a diode to the first load switch or logic switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a wireless remote control switch and a control method thereof;

[0025] Figure 2 It is a remote control schematic diagram of a wireless remote control switch;

[0026] Figure 3 is a structural schematic diagram of a first power management circuit;

[0027] Figure 4 It is a circuit diagram of an AC / DC compatible step-down circuit of a wireless remote control switch;

[0028] Figure 5 The invention discloses a circuit diagram of a second power management circuit of a wireless remote control switch.

[0029] In the figure, 1-energy collector, 2-energy collection chip, 3-battery, 4-first power management circuit, 5-second power management circuit, 6-first load switch, 7-second load switch, 8-first relay, 9-second relay, 10-microcontroller, 11-wireless communication module, 12-input port, 13-output port, 14-remote control, 15-power supply, 16-load, 41-double-pole double-throw switch, 42-AC / DC compatible step-down circuit. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0031] Specific implementation method 1: Combination Figure 1-5 The present embodiment is described. A wireless remote control switch of the present embodiment includes an energy collector 1, an energy collection chip 2, a battery 3, a first power management circuit 4, a second power management circuit 5, a first load switch 6, a second load switch 7, a first relay 8, a second relay 9, a microcontroller 10, a wireless communication module 11, an input port 12 and an output port 13. The input port 12 is connected to the first power management circuit 4, the first relay 8 and the second relay 9 respectively. The input of the first power management circuit 4 is connected to the output of the battery 3. The output of the first power management circuit 4 is connected to the input of the first relay 8 through the first load switch 6. The input of the energy collection chip 2 is connected to the first The output of the relay 8 is connected, the output of the energy collection chip 2 is respectively connected to the microcontroller 10, the wireless communication module 11, and the second load switch 7, the input of the second relay 9 is connected to the second load switch 7, the output of the second relay 9 is connected to the output port 13, the microcontroller 10 is connected to the wireless communication module 11, the output of the microcontroller 10 is connected to the input of the second load switch 7, the microcontroller 10, the energy collection chip 2 are connected to the input of the first load switch 6, the microcontroller 10 can realize the switch control of the first load switch 6 and the second load switch 7, and realize the communication with the wireless communication module 11 to obtain the control instruction of the remote control, and the energy collection chip 2 is connected to the energy collector 1;

[0032] The output of the energy collection chip 2 is connected to a diode, the microcontroller 10 is connected to another diode, and the two diodes are connected to the first load switch 6 to achieve switch control of the first load switch 6;

[0033] The energy collector 1 adopts a radio frequency energy collector. The energy collector 1 is connected to the remote controller 14 for receiving remote control start energy. The wireless communication module 11 is connected to the remote controller 14 for receiving remote control signals. The input port 12 is connected to the power supply 15. The output port 13 is connected to the load 16. In the figure, the solid line is a function or power supply connection, and the dotted line is a signal connection.

[0034] The first power management circuit 4 includes a double-pole double-throw switch 41 and an AC / DC compatible step-down circuit 42. A terminal ③ on one side of the double-pole double-throw switch 41 is connected to the external power input port 12, and a terminal ① on one side is connected to the battery 3 input port. The power supply mode of the power management circuit 1 can be predetermined according to the type of the external power supply. For an external power supply that is sensitive to energy consumption, the battery 3 provided by the wireless remote control switch should be used to power the first power management circuit 4. For an external power supply that is not sensitive to energy consumption, an external power supply should be used to power the first power management circuit 4.

[0035] The terminal ⑥ on the other side of the double-pole double-throw switch 41 is connected to the AC-DC compatible buck circuit 42, and the terminal ④ on the other side of the double-pole double-throw switch 41 and the AC-DC compatible buck circuit 42 are connected in parallel to the first load switch 6. The AC-DC compatible buck circuit 42 in the first power management circuit 4 includes a single-pole double-throw switch, a DC / DC circuit (BUCK-BOOST circuit) and an AC-DC circuit. The terminal ⑥ is electrically connected to the BUCK-BOOST circuit and the AC-DC circuit through the single-pole double-throw switch. The BUCK-BOOST circuit and the AC-DC circuit are both connected to the first load switch 6. The double-pole double-throw switch is connected to the first load switch 6 through the single-pole double-throw switch. The terminal ⑥ of switch 41 is connected to the DC / DC circuit or the AC-DC circuit, and is used to realize the switching between the BUCK-BOOST circuit and the AC-DC circuit. The working mode of the AC / DC compatible buck circuit can be predetermined according to the type of the external power supply. For a DC type external power supply, the BUCK-BOOST circuit should be used to adjust the external power supply accordingly and then output stably to the first load switch 6. The BUCK-BOOST circuit can be replaced with a BUCK circuit or other types according to actual application requirements. For an AC type external power supply, the AC-DC circuit should be used to rectify and then output stably to the first load switch 6.

[0036] The second power management circuit 5 has the same structure as the first power management circuit 4. The second power management circuit 5 includes a single-pole double-throw switch, a BUCK-BOOST circuit and an AC-DC circuit. The connection method between the two ends (input end and output end) of the second power management circuit 5 and other components is the same as that of the first power management circuit 4. The double-pole double-throw switch of the second power management circuit 5 is connected to the first relay 8, and the double-pole double-throw switch of the second power management circuit 5 is connected to the second load switch 7, the microcontroller 10, and the wireless communication module 11. The BUCK-BOOST circuit and the AC-DC circuit are both connected to the second load switch 7, the microcontroller 1 0, the wireless communication module 11 is connected, the first load switch 6 is turned on to drive the first relay 8 to turn on, the second power management circuit 5 is powered, and then the microcontroller 10, the wireless communication module 11 and the second load switch 7 are powered, the second power management circuit 5 can realize the level conversion from the input port voltage to the microcontroller and the wireless communication module; the working mode of the second power management circuit 5 can be predetermined according to the type of external power supply; for a DC type external power supply, a BUCK-BOOST circuit should be used to adjust the external power supply accordingly to output stably to the second load switch 7, the microcontroller 10 and the wireless communication module 11;

[0037] The DC / DC circuit is a BUCK circuit; further, it is a BUCK-BOOST circuit, and the BUCK-BOOST circuit can be replaced with a BUCK circuit or other types according to actual application requirements; for an AC type external power supply, an AC-DC circuit should be used for rectification to provide a stable output to the second load switch 7, the microcontroller 10 and the wireless communication module 11;

[0038] The present invention utilizes wireless radio frequency energy transmission to realize long-distance wireless energy transmission. When it is used as a wake-up signal transmission means, the receiving end does not need to maintain standby power consumption because the standby voltage (energy) is transmitted wirelessly from the outside, thereby eliminating a large amount of long-term standby power consumption and improving the system life. Therefore, a wireless remote control switch based on radio frequency energy transmission proposed by the present invention can eliminate the standby power consumption of the wireless remote control switch, extend the service life of the wireless remote control switch, and has broad application prospects.

[0039] Specific implementation method 2: Combination Figure 1-5 This embodiment is described. A control method of a wireless remote control switch in this embodiment adopts a wireless remote control switch. As shown in the figure, the solid line represents energy flow, and the dotted line represents signal transmission. The radio frequency energy collector 1 is connected to the energy collection management chip 2. The collected energy is stored in the energy management chip 2 and then released to drive the first load switch 6 to turn on.

[0040] The output of the energy management chip 2 and the control signal of the microcontroller 10 are connected in parallel to the first load switch 6 through two diodes to realize the OR logic switch control of the first load switch 6. The diode can prevent the current from flowing back between the two.

[0041] The input port 12 is connected to the first power management circuit 4, the first relay 8 and the second relay 9;

[0042] The output of the battery 3 is connected to the first power management circuit 4, and the output of the first power management circuit 4 is connected to the first load switch 6. When the external power supply is sensitive to energy consumption, the battery supplies power to the first load switch 6 through the first power management circuit 4;

[0043] The output of the first load switch 6 is connected to the first relay 8, the output of the first relay 8 is connected to the second power management circuit 5, and the output of the second power management circuit 5 is connected to the microcontroller 10, the wireless communication module 11 and the second load switch 7; the microcontroller 10 can realize the switch control of the first load switch 6 and the second load switch 7, and realize the communication with the wireless communication module to obtain the control instruction of the remote controller 14;

[0044] The output of the second load switch 7 is connected to the second relay 9, and the output of the second relay 9 is connected to the output port 13 of the wireless remote control switch;

[0045] The wireless remote control switch can realize remote control switch control of power transmission between the power source 15 and the load 16; the working modes of the first power management circuit and the second power management circuit are pre-set according to the type of external power supply; the external power supply or battery supplies energy to the first load switch 6 through the first power management circuit 4; the remote control is initiated by external radio frequency energy injection, and when the remote control is not initiated, the first load switch 6 in the wireless remote control switch is turned off, and the load 16 cannot be powered;

[0046] After the RF energy collector 1 collects the RF energy emitted by the remote controller 14, the energy management chip 2 turns on the first load switch 6; the first load switch 6 is powered by an external power supply or a battery via the first power management circuit 4;

[0047] like Figure 3 As shown, the first power management circuit 4 can realize the composite energy management of the battery and the external power input; the first power management circuit 4 includes a double-pole double-throw switch and an AC / DC compatible step-down circuit, a terminal ③ on one side of the double-pole double-throw switch is connected to the external power input port, and a terminal ① on one side is connected to the battery input port, and the power supply mode of the first power management circuit can be predetermined according to the type of the external power supply; for an external power supply that is more sensitive to energy consumption, the battery provided by the wireless remote control switch should be used to power the first power management circuit 4, and for an external power supply that is not sensitive to energy consumption, an external power supply should be used to power the first power management circuit 4;

[0048] like Figure 4 As shown, the AC / DC compatible buck circuit in the first power management circuit 4 includes a single-pole double-throw switch, a BUCK-BOOST circuit and an AC-DC circuit. The working mode of the AC / DC compatible buck circuit can be predetermined according to the type of the external power supply. For a DC type external power supply, a BUCK-BOOST circuit should be used to adjust the external power supply accordingly and then output a stable output to the first load switch 6. The BUCK-BOOST circuit can be replaced with a BUCK circuit or other types according to actual application requirements. For an AC type external power supply, an AC-DC circuit should be used to rectify and then output a stable output to the first load switch 6.

[0049] After the first load switch 6 is turned on, it drives the first relay 8 to be turned on, and the second power management circuit 5 is powered, thereby powering the microcontroller 10, the wireless communication module 11 and the second load switch 7;

[0050] like Figure 5 As shown, the second power management circuit 5 can realize the level conversion from the input port voltage to the microcontroller and the wireless communication module; the second power management circuit 5 includes a single-pole double-throw switch, a BUCK-BOOST circuit and an AC-DC circuit, and the working mode of the second power management circuit 5 can be predetermined according to the type of the external power supply; for a DC type external power supply, a BUCK-BOOST circuit should be used to adjust the external power supply accordingly and then output stably to the second load switch 7, the microcontroller and the wireless communication module; the BUCK-BOOST circuit can be replaced with a BUCK circuit or other types according to actual application requirements; for an AC type external power supply, an AC-DC circuit should be used to rectify and then output stably to the second load switch 7, the microcontroller 10 and the wireless communication module 11;

[0051] After the wireless communication module 11 receives the external remote control signal, the microcontroller 10 controls the second load switch 7 to be turned on or off, and then controls the second relay 9 to be turned on or off, so as to realize the switch control from the power supply to the load end; according to the different signals sent by the remote control, flexible remote control switch control can be realized, such as timed switch, periodic switch, etc.;

[0052] The method is used to implement remote switch control of power transmission between a power source 15 and a load 16, and comprises the following steps:

[0053] After the external RF energy is injected, the energy collection management chip 2 turns on the first load switch 6, thereby turning on the first relay 8, and the second power management circuit 5 is powered, thereby powering the microcontroller 10, the wireless communication module 11, and the second load switch 7;

[0054] According to the external remote control signal received by the wireless communication module, the microcontroller controls the second load switch 7 to be turned on or off, and then controls the second relay 9 to be turned on or off, so as to realize the switch control from the power supply 15 to the load 16 end; according to the different signals sent by the remote controller, flexible remote control switch control can be realized, such as timed switch, periodic switch, etc.;

[0055] The remote control is initiated by injecting external radio frequency energy of the remote controller 14 into the energy collector 1. When the remote control is not initiated, the standby power consumption of a wireless remote control switch is only the static power consumption of the first power management circuit 4, and there is no waiting connection power consumption;

[0056] When the power supply 15 is an external power supply that is sensitive to energy consumption (an external power supply that is sensitive to energy consumption refers to an external power supply used by devices that have high requirements for power quality and stability, and such devices generally include electronic devices that require high-precision voltage and current supply), for an external power supply that is more sensitive to energy consumption, the battery 3 and the power supply 15 are reviewed for energy management through the first power management circuit 4, and the battery 3 is used for power supply. When the power supply 15 is an external power supply that is not sensitive to energy consumption, for an external power supply that is not sensitive to energy consumption, the power supply 15 is used to power the first power management circuit 4;

[0057] The input voltage of the input port 12 can be high voltage or low voltage, and the current can be AC ​​or DC. The circuit structure of the first power management circuit 4 and the second power management circuit 5 can be adjusted according to the voltage state of the input port to achieve level conversion;

[0058] In the present invention, after the RF energy collector collects energy to turn on the load switch, the load switch drives the relay to turn on, so that the external power supply drives the microcontroller and the load to work; when the wireless remote control switch does not receive a remote control signal, only the static power consumption of the first power management circuit can be avoided, and a large amount of standby power consumption generated by the load waiting for the signal for a long time in the standby state can be avoided, thereby greatly extending the service life of the wireless switch; through the design of the power management circuit, the present invention is adaptable to low-voltage, high-voltage, DC, and AC external power supplies, and can be applied to a variety of scenarios.

[0059] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the present invention will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the present invention.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wireless remote control switch, characterized in that: The invention comprises an energy collector (1), an energy collection chip (2), a battery (3), a first power management circuit (4), a second power management circuit (5), a first load switch (6), a second load switch (7), a first relay (8), a second relay (9), a microcontroller (10), a wireless communication module (11), an input port (12) and an output port (13), wherein the input port (12) is connected to the first power management circuit (4), the first relay (8) and the second relay (9), the first power management circuit (4) is connected to the battery (3), and the first power management circuit (4) is connected to the first load switch (6). ) is connected to the first relay (8), the energy collection chip (2) is connected to the first relay (8), the energy collection chip (2) is connected to the microcontroller (10), the wireless communication module (11), and the second load switch (7), the second relay (9) is connected to the second load switch (7), the second relay (9) is connected to the output port (13), the microcontroller (10) is connected to the wireless communication module (11), the microcontroller (10) is connected to the second load switch (7), the microcontroller (10), the energy collection chip (2) are connected to the first load switch (6), and the energy collection chip (2) is connected to the energy collector (1).

2. A wireless remote control switch according to claim 1, characterized in that: The energy collection chip (2) and the microcontroller (10) are respectively connected in parallel to the first load switch (6) via diodes.

3. A wireless remote control switch according to claim 2, characterized in that: The energy collector (1) adopts a radio frequency energy collector, the energy collector (1) receives a start energy signal, a remote controller (14) remotely controls the start energy, a wireless communication module (11) is connected to the remote controller (14) for receiving the remote control signal, an input port (12) is connected to a power source (15), and an output port (13) is connected to a load (16).

4. A wireless remote control switch according to claim 3, characterized in that: The first power management circuit (4) comprises a double-pole double-throw switch (41) and an AC / DC compatible step-down circuit (42), wherein the double-pole double-throw switch (41) is connected to the input port (12) and the battery (3) respectively; The double-pole double-throw switch (41) is connected to an AC / DC compatible step-down circuit (42); the double-pole double-throw switch (41) and the AC / DC compatible step-down circuit (42) are connected in parallel to a first load switch (6); the AC / DC compatible step-down circuit (42) comprises a single-pole double-throw switch, a DC / DC circuit and an AC-DC circuit; the double-pole double-throw switch (41) is connected to the DC / DC circuit or the AC-DC circuit via the single-pole double-throw switch.

5. A wireless remote control switch according to claim 4, characterized in that: The second power management circuit (5) has the same structure as the first power management circuit (4).

6. A wireless remote control switch according to claim 5, characterized in that: The DC / DC circuit is a BUCK circuit.

7. A control method for a wireless remote control switch, characterized in that: The wireless remote control switch according to claim 6 comprises the following steps: After external radio frequency energy is injected, the energy collection chip (2) turns on the first load switch (6), thereby turning on the first relay (8), energizing the second power management circuit (5), and thereby energizing the microcontroller (10), the wireless communication module (11), and the second load switch (7); The microcontroller controls the second load switch (7) to be turned on or off, thereby controlling the second relay (9) to be turned on or off.

8. The control method of a wireless remote control switch according to claim 7, characterized in that: The standby power consumption of a wireless remote control switch is only the static power consumption of a first power management circuit (4).

9. The control method of a wireless remote control switch according to claim 8, characterized in that: When the power source (15) is an external power source that is sensitive to energy consumption, the first power management circuit (4) manages the power supply of the battery (3); when the power source (15) is an external power source that is not sensitive to energy consumption, the power source (15) is used to power the first power management circuit (4).

10. The control method of a wireless remote control switch according to claim 8, characterized in that: The input voltage of the input port (12) is high voltage or low voltage, and the current is AC or DC. The circuit structures of the first power management circuit (4) and the second power management circuit (5) are adjusted according to the voltage state of the input port to achieve level conversion.

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