Direct-current electronic switch and power utilization system based on direct-current electronic switch

Abstract

The utility model provides a direct-current electronic switch and a power utilization system based on the same. The direct-current electronic switch comprises a first direct-current single-line electricity taking module, a plurality of second direct-current single-line electricity taking modules, a power supply conversion module and a control module, the first direct-current single-wire electricity taking module comprises a first switch control unit and a first energy storage unit, and the first switch control unit is used for controlling conduction of a first load; each second direct-current single-wire electricity taking module comprises a second switch control unit, a second energy storage unit and an isolation unit, the second switch control unit is used for controlling conduction of a second load, the input end of the isolation unit is connected with the control module, and the output end of the isolation unit is connected with the second switch control unit; the isolation unit is used for isolating the first switch control unit from the second switch control units, and the second switch control units do not interfere with one another; and the control module is used for outputting multiple paths of PWM signals for respectively controlling the on-off of the first switch control unit and the second switch control unit.

Description

Technical Field

[0001] The utility model relates to the field of power equipment, in particular to a DC electronic switch and a power consumption system based on the DC electronic switch. Background Art

[0002] The mainstream lighting systems for household or similar uses generally use 220V~ power supply, so the electronic switch panels used in conjunction with them also have 220V~ power input. The working principle of the electronic switch panel is to control the on / off and brightness of the lamps by the on / off of a relay or semiconductor switch element.

[0003] The existing electronic switches use 220V~ power input, and an AC / DC switching power supply is built into the switch to convert the AC mains power input into a low-voltage DC power supply to provide power for the internal electronic circuits. This results in a relatively high cost of the electronic switch panel. In addition, the internal switching power supply circuit of the existing electronic switch is vulnerable to interference such as lightning strikes, surges, and harmonics in the power grid and is easily damaged. When used in a lighting power consumption system, the existing electronic switches need to be used in conjunction with LED lamps with a power driver, which also increases the cost of the LED lamps. The existing electronic switches and LED lamps will increase the capacitive load of the power grid due to their built-in switching power supplies, making the inrush current larger during the power-on process of the power grid and easily damaging other electrical appliances. Moreover, the existing electronic switches generally use zero-fire wire power supply, and one more neutral wire needs to be arranged for wiring compared with traditional mechanical switches, increasing the construction cost. Even though there are some electronic switches with single-fire wire power supply on the market, there is still a problem of LED lamp flickering due to their relatively high power consumption. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a DC electronic switch and a power consumption system based on the DC electronic switch.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A DC electronic switch, the DC electronic switch adopts single-wire DC power input, and its output end adopts multi-way single-wire output to connect multiple loads respectively. The DC electronic switch includes: a first DC single-wire power extraction module, a plurality of second DC single-wire power extraction modules, a power conversion module, and a control module;

[0007] The first single-wire DC power-taking module includes: a first switch control unit and a first energy storage unit. The first switch control unit and the first energy storage unit are respectively connected to the single-wire DC power supply input. The first switch control unit is used to control the conduction of the first load. The first energy storage unit is connected to the power conversion module to supply power to the power conversion module. The power conversion module is connected to the control module to convert the power-taking voltage into the internal power supply voltage of the switch to supply power to the control module. The control module is connected to the first switch control unit;

[0008] Each second single-wire DC power-taking module includes: a second switch control unit, a second energy storage unit, and an isolation unit. The second switch control unit and the second energy storage unit are respectively connected to the single-wire DC power supply input. The second switch control unit is used to control the conduction of the second load. The second energy storage unit is connected to the isolation unit to supply power to the isolation unit. The input end of the isolation unit is connected to the control module, and the output end of the isolation unit is connected to the second switch control unit. The isolation unit is used to isolate the first switch control unit from the second switch control unit and prevent interference between the second switch control units;

[0009] The control module is used to output multiple PWM signals to respectively control the opening and closing of the first switch control unit and the second switch control unit.

[0010] Preferably, the first switch control unit includes: a first controllable switch Q1, a first resistor R1, and a second resistor R2. The first end of the first controllable switch Q1 is connected to the single-wire DC power supply input. The second end of the first controllable switch Q1 is the output end. The control end of the first controllable switch Q1 is connected to the second end of the first resistor R1. The first end of the first resistor R1 is connected to the first signal output end of the control module. The first end of the second resistor R2 is connected to the control end of the first controllable switch Q1. The second end of the second resistor R2 is grounded through the second ground wire GND2.

[0011] Preferably, the first energy storage unit includes: a third resistor R3, a first one-way diode D1, and a first energy storage capacitor C1. The first end of the third resistor R3 is connected to the single-wire DC power supply input. The positive electrode of the first one-way diode D1 is connected to the second end of the third resistor R3. The negative electrode of the first one-way diode D1 is connected to the first end of the first energy storage capacitor C1. The second end of the first energy storage capacitor C1 is grounded. The first end of the first energy storage capacitor C1 is connected to the input end of the power conversion module.

[0012] Preferably, the first controllable switch Q1 is an NMOS transistor. The drain of the NMOS transistor is connected to the single-wire DC power supply input. The source of the NMOS transistor is the load output terminal. The gate of the NMOS transistor is connected to the control module through the first resistor R1.

[0013] Preferably, the second switch control unit includes: a second controllable switch Q2, a seventh resistor R7, and an eighth resistor R8. The first end of the second controllable switch Q2 is connected to the single-wire DC power supply input. The second end of the second controllable switch Q2 is the output terminal. The control end of the second controllable switch Q2 is connected to the second end of the seventh resistor R7. The first end of the seventh resistor R7 is connected to the output end of the isolation unit. The first end of the eighth resistor R8 is connected to the control end of the first controllable switch Q1. The second end of the eighth resistor R2 is grounded through the second ground wire GND2.

[0014] Preferably, the second energy storage unit includes: a ninth resistor R9, a second one-way diode D2, and a second energy storage capacitor C2. The first end of the ninth resistor R9 is connected to the single-wire DC power supply input. The positive electrode of the second one-way diode D2 is connected to the second end of the ninth resistor R9. The negative electrode of the second one-way diode D2 is connected to the first end of the second energy storage capacitor C2. The second end of the second energy storage capacitor C2 is connected to the second end of the second controllable switch Q2 and is grounded.

[0015] Preferably, the isolation unit includes: a sixth resistor R6, an optocoupler U3, and a zener diode D3. The first end of the sixth resistor R6 is connected to the second signal output end of the control module. The second end of the sixth resistor R6 is connected to the input end of the optocoupler U3. The ground end of the optocoupler U3 is grounded through the first ground wire GND1. The first end of the second energy storage capacitor C2 is connected to the reference voltage end of the optocoupler U3. The output end of the optocoupler U3 is connected to the first end of the seventh resistor R7.

[0016] Preferably, the second controllable switch Q2 is an NMOS transistor. The drain of the NMOS transistor is connected to the single-wire DC power supply input. The source of the NMOS transistor is the load output terminal. The gate of the NMOS transistor is connected to the isolation unit through the seventh resistor R7.

[0017] Preferably, the power conversion module includes: a step-down constant voltage chip U1, a peripheral input circuit, and a peripheral output circuit. The input end of the peripheral input circuit is connected to the energy storage unit, and the output end of the peripheral output circuit is connected to the control module. The peripheral input circuit includes: a fifth resistor R5 and a sixth capacitor C6. One end of the fifth resistor R5 is connected to the EN end of the step-down constant voltage chip U1, and the other end of the fifth resistor R5 is grounded through the sixth capacitor C6. The power input terminal VIN of the step-down constant voltage chip U1 is connected to the output end of the energy storage unit. The peripheral output circuit includes: a first inductor L1, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a tenth resistor R10, an eleventh resistor R11, and a third one-way diode D3. The first end of the first inductor L1 is connected to the SW end of the step-down constant voltage chip U1. The second end of the first inductor L1 is connected to the first end of the tenth resistor R10. The second end of the tenth resistor R10 is connected to the first end of the eleventh resistor R11. The second end of the eleventh resistor R11 is grounded. The second end of the first inductor L1 is also respectively connected to the first ends of the fourth capacitor C4 and the fifth capacitor C5. The second ends of the fourth capacitor C4 and the fifth capacitor C5 are grounded. The BST end of the step-down constant voltage chip U1 is connected to the first end of the third capacitor C3. The second end of the third capacitor C3 is connected to the first end of the first inductor L1. The FB end of the step-down constant voltage chip U1 is connected to the second end of the tenth resistor R10. The negative end of the third one-way diode D3 is connected to the first end of the first inductor L1, and the positive end of the third one-way diode D3 is grounded.

[0018] Preferably, the control module includes a control chip U2, a crystal oscillator Y1, a power input circuit, and a signal input circuit. The input end of the crystal oscillator Y1 is connected to the XI end of the control chip U2, and the output end of the crystal oscillator Y1 is connected to the XO end of the control chip U2. The power input circuit includes a ninth capacitor C9 and a fourteenth capacitor C14 connected in parallel. The power input terminal VDD3 of the control chip U2 is grounded through the ninth capacitor C9 and the fourteenth capacitor C14. The signal input circuit includes: an antenna E1, a sixteenth resistor R16, a twelfth capacitor C12, and a thirteenth capacitor C13. The RF end of the control chip U2 is connected to the first end of the sixteenth resistor R16. The second end of the sixteenth resistor R16 is connected to the antenna E1. One end of the twelfth capacitor C12 is connected to the first end of the sixteenth resistor R16 and the other end is grounded. One end of the thirteenth capacitor C13 is connected to the second end of the sixteenth resistor R16 and the other end is grounded.

[0019] Preferably, an interface module is further included, and the interface module includes: a key input unit and / or an output display unit;

[0020] The button input unit includes: a twelfth resistor R12, a seventh capacitor C7, and a button switch S1. The first end of the twelfth resistor R12 is connected to the output end of the power conversion module. The second end of the twelfth resistor R12 is connected to the first end of the button switch S1. The second end of the button switch S1 is grounded. The first end of the seventh capacitor C7 is connected to the first end of the twelfth resistor R12. The second end of the seventh capacitor C7 is grounded. The first end of the button switch S1 is also connected to the control module;

[0021] The output display unit includes: a ninth resistor R9 and a light-emitting diode D4. The first end of the ninth resistor R9 is connected to the output end of the power conversion module. The second end of the ninth resistor R9 is connected to the positive electrode end of the light-emitting diode D4. The negative electrode end of the light-emitting diode D4 is connected to the first end of the button switch S1.

[0022] The present utility model also provides a power consumption system based on a DC electronic switch, including: a DC power supply, a DC electronic switch, and at least two loads. The input end of the DC electronic switch is connected to the output end of the DC power supply through a single wire. The load is connected to the output end of the DC electronic switch through a single wire; wherein, the DC electronic switch is any one of the above-mentioned DC electronic switches. At least one load is connected to the first switch control unit of the first DC single-wire power-taking module of the DC electronic switch through a single wire. At least one load is connected to the second switch control unit of the second DC single-wire power-taking module of the DC electronic switch through a single wire.

[0023] Preferably, the load is an LED lamp. The LED lamp is provided with an LED light-emitting diode, a current-limiting resistor R4, and a parallel resistor R51. The positive input end of the LED lamp is connected to the LED light-emitting diode through the current-limiting resistor R4. The other end of the LED light-emitting diode is connected to the negative input end of the LED lamp. The parallel resistor R51 is connected in parallel across the current-limiting resistor R4 and the LED lamp.

[0024] In the embodiment of the present utility model, a DC electronic switch powered by a low-voltage DC power supply (generally 48V) is adopted. The power supply for all DC electronic switches in an area is uniformly provided by a power supply device installed in a distribution box. In this way, the DC electronic switch can be internally provided with a DC / DC switching power supply to supply power to the internal electronic circuit, reducing the cost of the switch; moreover, the DC electronic switch has multiple single-wire power-taking modules, supports multiple load outputs, and realizes isolation of multiple-channel control through an isolation unit, enabling multiple lamp control circuits to work independently without interference.

[0025] Furthermore, the DC electronic switch is powered by low-voltage DC, is not easily affected by power grid lightning strikes, surges, harmonics, etc., and the product works more stably.

[0026] Furthermore, the DC electronic switch directly outputs a low-voltage DC control signal, which can directly control the LED lamp without an external power driver, reducing the cost of the LED lamp.

[0027] Furthermore, the DC electronic switch uses a two-wire system for the power supply positive terminal and the load output, which is the same as the wiring method of traditional mechanical switches, and the LED lamp will not flicker. Description of the Drawings

[0028] Figure 1 is a schematic diagram of the power consumption system based on the DC electronic switch of the present utility model;

[0029] Figure 2 is a schematic diagram of the module composition of the DC electronic switch of the present utility model;

[0030] Figure 3a is a circuit schematic diagram of the first DC single-wire power extraction module of the present utility model;

[0031] Figure 3b is a circuit schematic diagram of the second DC single-wire power extraction module of the present utility model;

[0032] Figure 4 is a circuit schematic diagram of the power conversion module of the present utility model;

[0033] Figure 5 is a chip schematic diagram of the control module of the present utility model;

[0034] Figure 6 is a crystal oscillator schematic diagram of the control module of the present utility model;

[0035] Figure 7 is a circuit schematic diagram of the peripheral power input circuit of the control module of the present utility model;

[0036] Figure 8 is a circuit schematic diagram of the key input unit of the interface module of the present utility model;

[0037] Figure 9 is a circuit schematic diagram of the output display unit of the interface module of the present utility model.

[0038] The reference numerals in the drawings are as follows:

[0039] DC electronic switch 100, first DC single-wire power taking module 110, switch control unit 111, energy storage unit 112, power conversion module 120, peripheral input circuit 121, peripheral output circuit 122, control module 130, power input circuit 131, signal input circuit 132, interface module 140, button input unit 141, output display unit 142, second DC single-wire power taking module 150, second switch control unit 151, second energy storage unit 152, isolation unit 153, DC power supply 200, load 300. Detailed implementation manners

[0040] The following embodiments given in conjunction with the drawings further illustrate the detailed implementation manners of the DC electronic switch of the present utility model. The DC electronic switch of the present utility model is not limited to the descriptions of the following embodiments.

[0041] As Figure 1 shown is a schematic diagram of the DC electronic switch of this embodiment applied to an electrical system. The electrical system includes: a DC power supply 200, a DC electronic switch 100, and a load 300; taking a common lighting system as an example, the load 300 can be an LED lamp. Of course, it can also be used for other loads. Combining Figure 2 shown, the DC electronic switch 100 of this embodiment can control multiple outputs, so the load 300 can be multiple.

[0042] In this embodiment, the DC power supply 200 can supply power to all DC electronic switches and loads in a region. The DC power supply 200 can be provided by a power supply device of a distribution box installed in this region. As an optional implementation manner, the DC power supply 200 provides a power supply voltage of 48V.

[0043] As Figure 2 , 3a , 3b shown, a DC electronic switch 100 provided in this embodiment. The DC electronic switch 100 adopts a single-wire DC power input, and its output end adopts multiple single-wire outputs to be respectively connected to multiple loads (LED lamps in this embodiment). The DC electronic switch includes: a first DC single-wire power taking module 110, multiple second DC single-wire power taking modules 150, a power conversion module 120, and a control module 130.

[0044] In this embodiment, the first single - wire DC power - taking module 110 includes: a first switch control unit 111 and a first energy storage unit 112. The first switch control unit 111 is used to control the conduction of the first load. The first energy storage unit 112 is connected to the power conversion module 120 and is used to supply power to the power conversion module 120. The power conversion module 120 is connected to the control module 130 and is used to convert the power - taking voltage into an internal - supply voltage of the switch to supply power to the control module 130. The first switch control unit 111 and the first energy storage unit 112 are respectively connected to the single - wire DC power input, that is, connected to the input power supply + of the DC power supply 200. The control module 130 is connected to the first switch control unit 111;

[0045] Each second single - wire DC power - taking module 150 includes: a second switch control unit 151, a second energy storage unit 152, and an isolation unit 153. The second energy storage unit 152 is connected to the isolation unit 153 to supply power to the isolation unit 153. The second switch control unit 151 is used to control the conduction of the second load. The second switch control unit 151 and the second energy storage unit 152 are respectively connected to the single - wire DC power input, that is, connected to the input power supply + of the DC power supply 200. The input end of the isolation unit 153 is connected to the control module 130, and the output end of the isolation unit 153 is connected to the second switch control unit 151. The isolation unit 153 is used to isolate the first switch control unit 111 from the second switch control unit 151 and prevent interference between the second switch control units 151. The control module 130 is used to output multiple PWM signals to respectively control the opening and closing of the first switch control unit 111 and the second switch control unit 151.

[0046] In this embodiment, as Figure 3a shown, the first switch control unit 111 includes: a first controllable switch Q1, a first resistor R1, and a second resistor R2. The first end of the first controllable switch Q1 is connected to the single - wire DC power input. The second end of the first controllable switch Q1 is the output end. The control end of the first controllable switch Q1 is connected to the second end of the first resistor R1. The first end of the first resistor R1 is connected to the first signal output end of the control module 130. The first end of the second resistor R2 is connected to the control end of the first controllable switch Q1. The second end of the second resistor R2 is grounded through the second ground wire GND2. In this embodiment, the second end of the first controllable switch Q1, as the output end, is connected to the current - limiting resistor R4 of the LED lamp.

[0047] Further, the first energy storage unit 112 includes: a third resistor R3, a first one-way diode D1, and a first energy storage capacitor C1. The first end of the third resistor R3 is connected to the single-wire DC power input, that is, to the electrical input power supply + of the DC power supply. The positive electrode of the first one-way diode D1 is connected to the second end of the third resistor R3. The negative electrode of the first one-way diode D1 is connected to the first end of the first energy storage capacitor C1. The second end of the first energy storage capacitor C1 is connected to the second end of the first controllable switch Q1 and is grounded. The first end of the first energy storage capacitor C1 is connected to the input end of the power conversion module 120.

[0048] As an alternative embodiment, the first controllable switch Q1 is an NMOS transistor. The drain of the NMOS transistor is connected to the single-wire DC power input. The source of the NMOS transistor is the load output end. The gate of the NMOS transistor is connected to the control module 130 through the first resistor R1.

[0049] In this embodiment, the second switch control unit 151 includes: a second controllable switch Q2, a seventh resistor R7, and an eighth resistor R8. The first end of the second controllable switch Q2 is connected to the single-wire DC power input. The second end of the second controllable switch Q2 is the output end. The control end of the second controllable switch Q2 is connected to the second end of the seventh resistor R7. The first end of the seventh resistor R7 is connected to the output end of the isolation unit 153. The first end of the eighth resistor R8 is connected to the control end of the first controllable switch Q1. The second end of the eighth resistor R2 is grounded through the second ground wire GND2. In this embodiment, the second end of the second controllable switch Q2, as the output end, is connected to the current-limiting resistor R41 of another LED lamp.

[0050] Further, the second energy storage unit 152 includes: a ninth resistor R9, a second one-way diode D2, and a second energy storage capacitor C2. The first end of the ninth resistor R9 is connected to the single-wire DC power input. The positive electrode of the second one-way diode D2 is connected to the second end of the ninth resistor R9. The negative electrode of the second one-way diode D2 is connected to the first end of the second energy storage capacitor C2. The second end of the second energy storage capacitor C2 is connected to the second end of the second controllable switch Q2 and is grounded.

[0051] Further, the isolation unit 153 includes: a sixth resistor R6, an optocoupler U3, and a zener diode D3. The first end of the sixth resistor R6 is connected to the second signal output end of the control module 130, the second end of the sixth resistor R6 is connected to the input end of the optocoupler U3, the ground end of the optocoupler U3 is grounded through a first ground wire GND1, the first end of the second energy storage capacitor C2 is connected to the reference voltage end of the optocoupler U3, and the output end of the optocoupler U3 is connected to the first end of the seventh resistor R7.

[0052] Similarly, the second controllable switch Q2 can be an NMOS transistor. The drain of the NMOS transistor is connected to the single-wire DC power input, the source of the NMOS transistor is the load output end, and the gate of the NMOS transistor is connected to the isolation unit 153 through the seventh resistor R7.

[0053] In this embodiment, the control module 130 has multiple signal output ends and can output multiple PWM signals. Taking the above first DC single-wire power taking module 110 as an example, the control module 130 outputs a PWM1 signal with a first specific duty cycle, and then controls the first controllable switch Q1 to be periodically closed and opened, and the LED lamp 1 is lit. The duty cycle of the PWM1 signal determines the brightness of the LED lamp 1. Specifically, when the control module 130 outputs a PWM1 control signal with a frequency of 20 kHz and a duty cycle of 50%, the reference ground is GND2. When the PWM1 signal is at a high level, the controllable terminal voltage Vgs of the first controllable switch Q1 is greater than its turn-on voltage, and the first controllable switch Q1 conducts. The input power supply + passes through the first controllable switch Q1, the current-limiting resistor R4, and the LED lamp 1 and returns to the input power supply -, and the LED lamp 1 is lit. At this time, other modules of the DC electronic switch are powered by the energy stored in the first energy storage capacitor C1.

[0054] When the PWM control signal is at a low level, the first controllable switch Q1 is cut off, the LED lamp 1 is turned off, and the input power supply charges the first energy storage capacitor C1 through the third resistor R3, the first one-way diode D1, and the parallel resistor R51 of the LED lamp 1, and continuously powers other modules. Since the frequency of the PWM1 signal is relatively high, the flicker of the on / off of the LED lamp 1 cannot be detected by the human eye, and the brightness adjustment of the LED lamp 1 can be directly realized. The DC power supply alternately powers the lighting of the LED lamp and charges the first energy storage capacitor C1 of the energy storage unit 112.

[0055] It should be noted that the duty cycle of the PWM1 signal output by the control module 130 cannot be 100%, because when the first controllable switch Q1 is always on, the first energy storage capacitor C1 is always in a discharging state until it is discharged completely, and the control module 130 will not be able to work because it cannot obtain power. The maximum duty cycle supported by the DC electronic switch needs to be determined according to the actual power consumption of the whole machine circuit.

[0056] In this embodiment, the DC electronic switch 100 is powered by a single line and is usually installed on a wall. The current limiting resistor R4 of the LED lamp 1 is generally installed in the LED lamp PCB board. It can be set to a specific resistance value according to the power of different LED lamps to protect the LED from overcurrent operation, thereby ensuring the service life of the lamp and the versatility of the electronic switch.

[0057] As described above, when the user operates the switch to turn off the LED lamp, the input power supply continues to charge the first energy storage capacitor C1 until it is fully charged. When the user operates the switch to light up the LED lamp, the control module outputs a PWM signal to control the first controllable switch Q1 to be periodically turned on, thereby achieving brightness control of the LED lamp 1 and realizing single-line power supply of the DC electronic switch by periodically charging the first energy storage capacitor C1.

[0058] Furthermore, when you need to connect the second LED lamp 2 to the load output 2, GND1 and GND2 cannot be short-circuited to the common ground, otherwise when controlling the load output 1, the load output 2 will also be controlled synchronously. Therefore, the control of the load output 1 and the load output 2 needs to be isolated and not interfere with each other. Figure 3b As shown, at this time, the isolation unit 153 is required to isolate the control signal PWM2 from the first DC single-line power supply module 110 .

[0059] When powered on, since LED Lamp 2 is disconnected, the input power flows through current-limiting resistor R9 and second unidirectional diode D2, charging the second energy storage capacitor C2 and converting it into output power VCC1. The power reference ground is GND2. When the control module detects a key press (or receives a control input), it outputs a PWM2 control signal with a frequency of 20kHz and a duty cycle of 50%, with reference ground GND1. When the PWM2 signal is high, the optocoupler U3 emitter conducts, and the output transistor subsequently conducts. After VCC1 is stepped down by voltage regulator diode D2, the Vgs voltage of second controllable switch Q2 is less than its maximum withstand voltage but greater than its turn-on threshold voltage. This turns on second controllable switch Q2, and the input power + is returned to the input power - through second controllable switch Q2, current-limiting resistor R41, and LED Lamp 2, illuminating LED Lamp 2.

[0060] When the PWM2 control signal is at a low level, the optocoupler U3 emitter is not conducting and the output transistor is cut off. At this time, Vgs = 0V, the second controllable switch Q2 is cut off, the LED lamp 2 is off, and the input power charges C2 through the current limiting resistor R9, the diode D2, and the LED parallel resistor R52.

[0061] As described above, when multiple lighting fixture loads are connected, the electronic modules of the entire electronic switch are all powered by VCC2 converted by the first DC single-wire power-taking module 110, with the reference ground GND2. The PWM control signals of multiple power-taking and control modules are all sent by the control module, and the reference ground is GND1. In this way, isolation between multiple DC electronic switches is achieved, and they do not interfere with each other. Only one first DC single-wire power-taking module 110 and one second DC single-wire power-taking module 150 are shown in the figure of this embodiment. Two or more second DC single-wire power-taking modules 150 can be set according to needs.

[0062] In this embodiment, the input end of the power conversion module 120 is connected to the output end of the energy storage unit 112, and the output end of the power conversion module 120 is connected to the control module 130.

[0063] As a specific implementation manner, as Figure 4 shown, the power conversion module 120 includes: a step-down constant voltage chip U1, a peripheral input circuit 121, and a peripheral output circuit 122. The input end of the peripheral input circuit is connected to the energy storage unit 112, and the output end of the peripheral output circuit 122 is connected to the control module 130. The optional model of the step-down constant voltage chip U1 in this embodiment is TX4133.

[0064] Further, the peripheral input circuit 121 includes: a fifth resistor R5 and a sixth capacitor C6. One end of the fifth resistor R5 is connected to the EN end of the step-down constant voltage chip U1, and the other end of the fifth resistor R5 is grounded through the sixth capacitor C6. The power input end VIN of the step-down constant voltage chip U1 is connected to the output end of the energy storage unit 112. The peripheral output circuit 122 includes: a first inductor L1, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a tenth resistor R10, an eleventh resistor R11, and a third one-way diode D3. The first end of the first inductor L1 is connected to the SW end of the step-down constant voltage chip U1. The second end of the first inductor L1 is connected to the first end of the tenth resistor R10. The second end of the tenth resistor R10 is connected to the first end of the eleventh resistor R11. The second end of the eleventh resistor R11 is grounded. The second end of the first inductor L1 is also respectively connected to the first ends of the fourth capacitor C4 and the fifth capacitor C5. The second ends of the fourth capacitor C4 and the fifth capacitor C5 are grounded. The BST end of the step-down constant voltage chip U1 is connected to the first end of the third capacitor C3. The second end of the third capacitor C3 is connected to the first end of the first inductor L1. The FB end of the step-down constant voltage chip U1 is connected to the second end of the tenth resistor R10. The negative end of the third one-way diode D3 is connected to the first end of the first inductor L1, and the positive end of the third one-way diode D3 is grounded.

[0065] As shown in Figures 5 - 7 the figure, in this embodiment, the control module 130 includes a control chip U2, a crystal oscillator Y1, a power input circuit 131, and a signal input circuit 132. The input end of the crystal oscillator Y1 is connected to the XI end of the control chip U2, and the output end of the crystal oscillator Y1 is connected to the XO end of the control chip U2. The power input circuit 131 includes a ninth capacitor C9 and a fourteenth capacitor C14 connected in parallel. The power input end VDD3 of the control chip U2 is grounded through the ninth capacitor C9 and the fourteenth capacitor C14. The signal input circuit 132 includes: an antenna E1, a sixteenth resistor R16, a twelfth capacitor C12, and a thirteenth capacitor C13. The RF end of the control chip U2 is connected to the first end of the sixteenth resistor R16. The second end of the sixteenth resistor R16 is connected to the antenna E1. One end of the twelfth capacitor C12 is connected to the first end of the sixteenth resistor R16 and the other end is grounded. One end of the thirteenth capacitor C13 is connected to the second end of the sixteenth resistor R16 and the other end is grounded. The optional model of the control chip U2 in this embodiment is ST17H66.

[0066] Optionally, in addition to providing PMW signal output, the control module 130 can also implement user interface control and other intelligent communication functions, such as Bluetooth, Zigbee, and so on.

[0067] Optionally, the DC electronic switch 100 further includes an interface module 140, as shown in Figures 8 - 9 the figure. The interface module 140 includes: a key input unit 141 and / or an output display unit 142; the key input unit 141 includes: a twelfth resistor R12, a seventh capacitor C7, and a key switch S1. The first end of the twelfth resistor R12 is connected to the output end of the power conversion module 120. The second end of the twelfth resistor R12 is connected to the first end of the key switch S1. The second end of the key switch S1 is grounded. The first end of the seventh capacitor C7 is connected to the first end of the twelfth resistor R12. The second end of the seventh capacitor C7 is grounded. The first end of the key switch S1 is also connected to the control module 130; the output display unit 142 includes: a ninth resistor R9 and a light-emitting diode D3. The first end of the ninth resistor R9 is connected to the output end of the power conversion module 120. The second end of the ninth resistor R9 is connected to the positive electrode end of the light-emitting diode D3. The negative electrode end of the light-emitting diode D3 is connected to the first end of the key switch S1.

[0068] In this embodiment, only one path of the key input unit 141 and / or the output display unit 142 is described. To achieve the output of control signals with different duty cycles, one or more paths of the key input unit 141 and / or the output display unit 142 can be added to achieve the control of lights with different brightness.

[0069] Further, as shown in Figure 2 -3, in the power consumption system, the load 300 in this embodiment is an LED lamp on a multi-output. The input end of the DC electronic switch 100 is connected to the output end of the DC power supply 200 through a single wire. The load 300 is connected to the output end of the DC electronic switch 100 through a single wire. At least one load is connected to the first switch control unit 111 of the first DC single-wire power-taking module 110 of the DC electronic switch 100 through a single wire. At least one load is connected to the second switch control unit 151 of the second DC single-wire power-taking module 150 of the DC electronic switch 100 through a single wire. Inside each output LED lamp, there are an LED light-emitting diode, a current-limiting resistor, and a parallel resistor. The positive input end of the LED lamp is connected to the LED light-emitting diode through the current-limiting resistor. The other end of the LED light-emitting diode is connected to the negative input end of the LED lamp. The parallel resistor is connected in parallel at both ends of the current-limiting resistor and the LED lamp. For example, the LED lamp 1 is provided with a current-limiting resistor R4 and a parallel resistor R51, and the LED lamp 2 is provided with a current-limiting resistor R41 and a parallel resistor R52. Taking the LED lamp 1 as an example, the positive input end of the LED lamp 1 is connected to the LED light-emitting diode through the current-limiting resistor R4. The other end of the LED light-emitting diode is connected to the negative input end of the LED lamp. The parallel resistor R51 is connected in parallel at both ends of the current-limiting resistor R4 and the parallel resistor R51. The positive input end and the negative input end of the load 300 are respectively provided with a current-limiting resistor R4 and a parallel resistor R51. The resistance value of the current-limiting resistor R4 is set according to the power of the LED lamp 1. Similarly, the resistance value of the current-limiting resistor R41 is also set according to the power of the LED lamp 2.

[0070] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is customarily placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for differential description and cannot be understood as indicating relative importance.

[0071] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A DC electronic switch, characterized in that, The DC electronic switch adopts a single-line DC power supply input, and its output end adopts multi-line single-line outputs to be respectively connected to multiple loads. The DC electronic switch includes: a first DC single-line power-taking module (110), multiple second DC single-line power-taking modules (150), a power conversion module (120), and a control module (130); The first DC single-line power-taking module (110) includes: a first switch control unit (111) and a first energy storage unit (112). The first switch control unit (111) and the first energy storage unit (112) are respectively connected to the single-line DC power supply input. The first switch control unit (111) is used to control the conduction of the first load. The first energy storage unit (112) is connected to the power conversion module (120) to supply power to the power conversion module (120). The power conversion module (120) is connected to the control module (130) to convert the power-taking voltage into an internal power supply voltage of the switch to supply power to the control module (130). The control module (130) is connected to the first switch control unit (111); Each second DC single-line power-taking module (150) includes: a second switch control unit (151), a second energy storage unit (152), and an isolation unit (153). The second switch control unit (151) and the second energy storage unit (152) are respectively connected to the single-line DC power supply input. The second switch control unit (151) is used to control the conduction of the second load. The second energy storage unit (152) is connected to the isolation unit (153) to supply power to the isolation unit (153). The input end of the isolation unit (153) is connected to the control module (130). The output end of the isolation unit (153) is connected to the second switch control unit (151). The isolation unit (153) is used to isolate the first switch control unit (111) from the second switch control unit (151), and to prevent interference between the second switch control units (151); The control module (130) is used to output multi-channel PWM signals to respectively control the on / off of the first switch control unit (111) and the second switch control unit (151).

2. The DC electronic switch according to claim 1, wherein: The first switch control unit (111) includes: a first controllable switch Q1, a first resistor R1, and a second resistor R2. The first end of the first controllable switch Q1 is connected to the single-line DC power supply input. The second end of the first controllable switch Q1 is the output end. The control end of the first controllable switch Q1 is connected to the second end of the first resistor R1. The first end of the first resistor R1 is connected to the first signal output end of the control module (130). The first end of the second resistor R2 is connected to the control end of the first controllable switch Q1. The second end of the second resistor R2 is grounded through a second ground wire GND2.

3. The DC electronic switch according to claim 2, characterized in that: The first energy storage unit (112) includes: a third resistor R3, a first one-way diode D1, and a first energy storage capacitor C1. The first end of the third resistor R3 is connected to the single-wire DC power input. The positive electrode of the first one-way diode D1 is connected to the second end of the third resistor R3. The negative electrode of the first one-way diode D1 is connected to the first end of the first energy storage capacitor C1. The second end of the first energy storage capacitor C1 is grounded, and the first end of the first energy storage capacitor C1 is connected to the input end of the power conversion module (120).

4. The DC electronic switch according to claim 2, characterized in that: The first controllable switch Q1 is an NMOS transistor. The drain of the NMOS transistor is connected to the single-wire DC power input. The source of the NMOS transistor is the load output end. The gate of the NMOS transistor is connected to the control module (130) through the first resistor R1.

5. The DC electronic switch according to claim 2, wherein: The second switch control unit (151) includes: a second controllable switch Q2, a seventh resistor R7, and an eighth resistor R8. The first end of the second controllable switch Q2 is connected to the single-wire DC power input. The second end of the second controllable switch Q2 is the output end. The control end of the second controllable switch Q2 is connected to the second end of the seventh resistor R7. The first end of the seventh resistor R7 is connected to the output end of the isolation unit (153). The first end of the eighth resistor R8 is connected to the control end of the first controllable switch Q1. The second end of the eighth resistor R2 is grounded through the second ground wire GND2.

6. The DC electronic switch according to claim 5, wherein: The second energy storage unit (152) includes: a ninth resistor R9, a second one-way diode D2, and a second energy storage capacitor C2. The first end of the ninth resistor R9 is connected to the single-wire DC power input. The positive electrode of the second one-way diode D2 is connected to the second end of the ninth resistor R9. The negative electrode of the second one-way diode D2 is connected to the first end of the second energy storage capacitor C2. The second end of the second energy storage capacitor C2 is connected to the second end of the second controllable switch Q2 and is grounded.

7. The DC electronic switch according to claim 6, wherein: The isolation unit (153) includes: a sixth resistor R6, an optocoupler U3, and a zener diode D3. The first end of the sixth resistor R6 is connected to the second signal output end of the control module (130). The second end of the sixth resistor R6 is connected to the input end of the optocoupler U3. The ground end of the optocoupler U3 is grounded through the first ground wire GND1. The first end of the second energy storage capacitor C2 is connected to the reference voltage end of the optocoupler U3. The output end of the optocoupler U3 is connected to the first end of the seventh resistor R7.

8. The DC electronic switch according to claim 5, characterized in that: The second controllable switch Q2 is an NMOS transistor. The drain of the NMOS transistor is connected to the single-wire DC power input. The source of the NMOS transistor is the load output end. The gate of the NMOS transistor is connected to the isolation unit (153) through the seventh resistor R7.

9. The DC electronic switch according to claim 1, characterized in that: The power conversion module (120) includes: a buck constant voltage chip U1, a peripheral input circuit (121), and a peripheral output circuit (122). The input end of the peripheral input circuit is connected to the energy storage unit (112), and the output end of the peripheral output circuit (122) is connected to the control module (130); the peripheral input circuit (121) includes: a fifth resistor R5 and a sixth capacitor C6. One end of the fifth resistor R5 is connected to the EN end of the buck constant voltage chip U1, and the other end of the fifth resistor R5 is grounded through the sixth capacitor C6. The power input terminal VIN of the buck constant voltage chip U1 is connected to the output end of the energy storage unit (112). The peripheral output circuit (122) includes: a first inductor L1, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a tenth resistor R10, an eleventh resistor R11, and a third one-way diode D3. The first end of the first inductor L1 is connected to the SW end of the buck constant voltage chip U1. The second end of the first inductor L1 is connected to the first end of the tenth resistor R10. The second end of the tenth resistor R10 is connected to the first end of the eleventh resistor R11. The second end of the eleventh resistor R11 is grounded. The second end of the first inductor L1 is also respectively connected to the first ends of the fourth capacitor C4 and the fifth capacitor C5. The second ends of the fourth capacitor C4 and the fifth capacitor C5 are grounded. The BST end of the buck constant voltage chip U1 is connected to the first end of the third capacitor C3. The second end of the third capacitor C3 is connected to the first end of the first inductor L1. The FB end of the buck constant voltage chip U1 is connected to the second end of the tenth resistor R10. The negative terminal of the third one-way diode D3 is connected to the first end of the first inductor L1, and the positive terminal of the third one-way diode D3 is grounded.

10. The DC electronic switch according to claim 2, characterized in that: The control module (130) includes a control chip U2, a crystal oscillator Y1, a power input circuit (131), and a signal input circuit (132). The input end of the crystal oscillator Y1 is connected to the XI end of the control chip U2, and the output end of the crystal oscillator Y1 is connected to the XO end of the control chip U2. The power input circuit (131) includes a ninth capacitor C9 and a fourteenth capacitor C14 connected in parallel. The power input terminal VDD3 of the control chip U2 is grounded through the ninth capacitor C9 and the fourteenth capacitor C14. The signal input circuit (132) includes: an antenna E1, a sixteenth resistor R16, a twelfth capacitor C12, and a thirteenth capacitor C13. The RF end of the control chip U2 is connected to the first end of the sixteenth resistor R16. The second end of the sixteenth resistor R16 is connected to the antenna E1. One end of the twelfth capacitor C12 is connected to the first end of the sixteenth resistor R16 and the other end is grounded. One end of the thirteenth capacitor C13 is connected to the second end of the sixteenth resistor R16 and the other end is grounded.

11. The DC electronic switch according to claim 1, characterized in that: It further includes an interface module (140), and the interface module (140) includes: a key input unit (141) and / or an output display unit (142); The key input unit (141) includes: a twelfth resistor R12, a seventh capacitor C7, and a key switch S1. The first end of the twelfth resistor R12 is connected to the output end of the power conversion module (120), the second end of the twelfth resistor R12 is connected to the first end of the key switch S1, the second end of the key switch S1 is grounded, the first end of the seventh capacitor C7 is connected to the first end of the twelfth resistor R12, the second end of the seventh capacitor C7 is grounded, and the first end of the key switch S1 is also connected to the control module (130); The output display unit (142) includes: a ninth resistor R9 and a light emitting diode D4. The first end of the ninth resistor R9 is connected to the output end of the power conversion module (120), the second end of the ninth resistor R9 is connected to the positive electrode end of the light emitting diode D4, and the negative electrode end of the light emitting diode D4 is connected to the first end of the key switch S1.

12. An electricity consumption system based on a DC electronic switch, characterized in that, It includes: A DC power supply (200), a DC electronic switch (100), and at least two loads (300). The input end of the DC electronic switch (100) is connected to the output end of the DC power supply (200) through a single wire; wherein, the DC electronic switch (100) is the DC electronic switch according to any one of claims 1-11, and at least one load is connected to the first switch control unit (111) of the first DC single-wire power taking module (110) of the DC electronic switch (100) through a single wire, and at least one load is connected to the second switch control unit (151) of the second DC single-wire power taking module (150) of the DC electronic switch (100) through a single wire.

13. The power consumption system based on a DC electronic switch according to claim 12, characterized in that: The load (300) is an LED lamp. An LED light emitting diode, a current limiting resistor, and a parallel resistor are provided inside the LED lamp. The positive input end of the LED lamp is connected to the LED light emitting diode through the current limiting resistor, the other end of the LED light emitting diode is connected to the negative input end of the LED lamp, and the parallel resistor is connected in parallel at both ends of the current limiting resistor and the LED lamp.

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