Low-power automatic circuit breaker controller circuit and control method

Abstract

The present invention relates to a low-power automatic circuit breaker controller circuit and a control method. The low-power automatic circuit breaker controller circuit includes: a power supply circuit for rectifying the input power supply and supplying power; a current sensing circuit connected to the power supply circuit for outputting a switching signal according to the change in the magnitude of the supply current; a control circuit respectively connected to the power supply circuit and the current sensing circuit for controlling the on / off of the power supply circuit to the current sensing circuit; an aperture circuit respectively connected to the power supply circuit and the current sensing circuit for opening the aperture circuit when the current sensing circuit outputs a switching signal; an indicating aperture electrically connected to the aperture circuit for lighting the indicating aperture and giving a reminder that the electrical appliance is in standby low power consumption after the aperture circuit is opened; and a circuit breaker for performing a tripping operation in the low-power state. The low-power automatic circuit breaker controller circuit can achieve automatic tripping when the circuit is in the low-power state, and the implementation process is fully automated, with accurate judgment, ultra-low power consumption, and accurate detection.

Description

Technical Field

[0001] The present invention relates to the field of circuit control, and more particularly, to a low-power automatic circuit breaker controller circuit and a control method. Background Art

[0002] When an electrical appliance is in standby mode without power off after being turned off, an indicator light will be on, which indicates that the electrical appliance is consuming power. CCTV once broadcast a public service advertisement to remind people that household appliances can also consume a large amount of electrical energy when they are in standby mode with the power not cut off after being turned off. And there is also a potential safety hazard of electrical appliance fires.

[0003] It is hoped that people can check and cut off the power of all household appliances in the non-working state before going out. However, with the accelerating pace of modern social life and work, people's sense of time is getting stronger and stronger, and the shorter the time required to complete the same task, the better. The manual method of checking one electrical appliance after another not only has low efficiency but also is prone to the problem of missed checks.

[0004] Based on this, in order to improve the energy-saving effect of household appliance use and enhance the safety of household appliance use, we urgently need a device that can cut off the power when it recognizes that a household appliance is in a low-power state. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a low-power automatic circuit breaker controller circuit and a control method in view of the above-mentioned defect of low-power power consumption in the prior art.

[0006] The technical solution adopted by the present invention to solve its technical problems is to construct a low-power automatic circuit breaker controller circuit, including:

[0007] A power supply circuit for rectifying the input power supply and supplying power;

[0008] A current sensing circuit connected to the power supply circuit for outputting a switching signal according to the change in the magnitude of the supply current;

[0009] A control circuit connected to the power supply circuit and the current sensing circuit respectively for controlling the on-off of the power supply circuit to the current sensing circuit;

[0010] An aperture circuit connected to the power supply circuit and the current sensing circuit respectively for opening the aperture circuit when the current sensing circuit outputs a switching signal;

[0011] An indicating aperture electrically connected to the aperture circuit for lighting the indicating aperture to give a reminder that the electrical appliance is in standby low power consumption after the aperture circuit is opened; and

[0012] A circuit breaker for performing a tripping operation in a low-power state.

[0013] Preferably, the power supply circuit includes an input circuit, an output circuit, and a bridge rectifier circuit disposed between the input circuit and the output circuit. The input circuit is connected to the output end of the controller circuit, and after rectification, it is supplied with power after being stepped down by AC-DC conversion.

[0014] Preferably, the current sensing circuit includes a current sensor for sensing the change in the magnitude of the current to turn on and off to output a switching signal.

[0015] Preferably, the aperture circuit includes a triode, a first resistor and a second resistor connected in parallel and respectively connected to the pin 1 and pin 2 of the triode, a light-emitting diode connected to the pin 3 of the triode, and a third capacitor connected to the light-emitting diode. The first resistor and the second resistor are connected to the I / O port of the current sensing circuit, and after receiving the switching signal of the current sensing circuit, the power supply of the aperture circuit is turned on.

[0016] Preferably, the input end of the circuit breaker is connected to the mains power supply, the current sensing circuit and the power supply circuit are connected to the output end of the circuit breaker, and the control circuit is connected to the control end of the circuit breaker to control the circuit breaker switch to perform a tripping operation in the low power consumption state.

[0017] Preferably, the controller circuit further includes a delay circuit disposed between the power supply circuit and the aperture circuit, and the delay circuit delays the power supply voltage from the power supply circuit to the aperture circuit.

[0018] Preferably, the delay circuit is also connected to the control circuit to provide a driving level to the control circuit.

[0019] Preferably, the delay circuit includes an amplifier, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, and a second capacitor;

[0020] The pin 1 of the amplifier is connected to the power supply circuit, the pin 2 is grounded, and the pin 5 is connected to the aperture circuit;

[0021] The third resistor and the fourth resistor are connected in series, the third resistor is grounded, and the pins 3 and 5 of the amplifier are respectively connected in parallel at both ends of the fourth resistor;

[0022] The fifth resistor and the first capacitor are connected in series, and the fifth resistor is connected to the power supply circuit, and the first capacitor is connected to the pin 4 of the amplifier;

[0023] The sixth resistor is connected in parallel at both ends of the pins 4 and 5 of the amplifier, and the second capacitor is grounded and connected to the pin 4 of the amplifier respectively.

[0024] A low-power automatic circuit breaker control method includes the following steps:

[0025] S1. Rectify the input power supply and then supply power.

[0026] S2. Output a switching signal according to the change in the magnitude of the supplied current.

[0027] S3. Control the on / off of the power supply circuit to the current sensing circuit.

[0028] S4. When outputting the switching signal, turn on the aperture circuit, light up the indicating aperture, and then give a reminder that the electrical appliance is in the standby low-power state.

[0029] S5. Control the breaker switch to perform a tripping operation in the low-power state.

[0030] Preferably, in step S3, the power supply voltage of the power supply circuit to the aperture circuit is delayed.

[0031] Implementing the low-power automatic circuit breaker controller circuit and control method of the present invention has the following beneficial effects: The low-power automatic circuit breaker controller circuit can achieve automatic tripping when the circuit is in the low-power state, with a fully automated implementation process, accurate judgment, ultra-low power consumption, and accurate detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0033] Figure 1 is a schematic diagram of the principle of the low-power automatic circuit breaker controller circuit in an embodiment of the present invention;

[0034] Figure 2 is Figure 1 a circuit schematic diagram of the power supply circuit, current sensing circuit, control circuit, and circuit breaker in

[0035] Figure 3 is Figure 2 a circuit schematic diagram of the power supply circuit in

[0036] Figure 4 is Figure 2 a circuit schematic diagram of the control circuit in

[0037] Figure 5 is Figure 1 a circuit schematic diagram of the aperture circuit in

[0038] Figure 6 is Figure 1 a circuit schematic diagram of the delay circuit in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the drawings.

[0040] As Figure 1 、 Figure 2 shown, the low-power automatic circuit breaker controller circuit in a preferred embodiment of the present invention includes a power supply circuit 1, a current sensing circuit 2, a control circuit 3, an aperture circuit 4, an indicating aperture 5, and a circuit breaker 6.

[0041] The power supply circuit 1 rectifies the input power supply for power supply. The current sensing circuit 2 is connected to the power supply circuit 1 and is used to output a switching signal according to the change in the magnitude of the supply current.

[0042] The control circuit 3 is respectively connected to the power supply circuit 1 and the current sensing circuit 2 and is used to control the on / off of the power supply circuit 1 to the current sensing circuit 2.

[0043] The aperture circuit 4 is respectively connected to the power supply circuit 1 and the current sensing circuit 2. When the current sensing circuit 2 outputs a switching signal, the aperture circuit 4 is turned on.

[0044] The indicating aperture 5 is electrically connected to the aperture circuit 4. After the aperture circuit 4 is turned on, the indicating aperture 5 is lit to give a reminder that the electrical appliance is in standby low power consumption, and the circuit breaker 6 performs a tripping operation in the low power consumption state.

[0045] The low-power automatic circuit breaker controller circuit can automatically trip when the circuit is in the low power consumption state, and the implementation process is fully automated, with accurate judgment, ultra-low power consumption, and accurate detection.

[0046] Combined with Figures 2 to 4 shown, in some embodiments, the power supply circuit 1 includes an input circuit 11, an output circuit 12, and a bridge rectifier circuit 13 provided between the input circuit 11 and the output circuit 12. The input circuit 11 is connected to the output end of the controller circuit. After rectification and step-down through AC-DC conversion, it supplies power to the entire controller circuit.

[0047] As Figure 2 shown, further, the current sensing circuit 2 includes a current sensor 21 for sensing the change in the magnitude of the current to open and close to output a switching signal. When the magnitude of the current passing through the current sensor 21 changes due to the power cord or socket wire of the household electrical appliance, the switch of the current sensor 21 opens or closes to output a switching signal to the control circuit 3.

[0048] Preferably, as Figure 5 shown, the aperture circuit 4 includes a triode 41, a first resistor 42 and a second resistor 43 which are connected in parallel and respectively connected to the pin 1 and pin 2 of the triode 41, a light-emitting diode 44 connected to the pin 3 of the triode 41, and a third capacitor 45 connected to the light-emitting diode 44. The first resistor 42 and the second resistor 43 are connected to the I / O port of the current sensing circuit 2. After receiving the switching signal of the current sensing circuit 2, the power supply of the aperture circuit 4 is turned on.

[0049] Combined Figure 1 、 Figure 6 As shown, in some embodiments, the controller circuit further includes a delay circuit 7 disposed between the power supply circuit 1 and the aperture circuit 4, and the delay circuit 7 delays the power supply voltage from the power supply circuit 1 to the aperture circuit 4.

[0050] Furthermore, the delay circuit 7 is also connected to the control circuit 3 to provide a driving level to the control circuit 3.

[0051] Preferably, the delay circuit 7 includes an amplifier 71, a third resistor 72, a fourth resistor 73, a fifth resistor 74, a sixth resistor 75, a first capacitor 76, and a second capacitor 77. The duration of the delay can be adjusted by adjusting the third resistor 72, the fourth resistor 73, the fifth resistor 74, and the second capacitor 77.

[0052] Pin 1 of the amplifier 71 is connected to the power supply circuit 1, pin 2 is grounded, and pin 5 is connected to the aperture circuit 4. The third resistor 72 and the fourth resistor 73 are connected in series, the third resistor 72 is grounded, and pins 3 and 5 of the amplifier 71 are respectively connected in parallel across both ends of the fourth resistor 73.

[0053] The fifth resistor 74 and the first capacitor 76 are connected in series, and the fifth resistor 74 is connected to the power supply circuit 1, and the first capacitor 76 is connected to pin 4 of the amplifier 71. The sixth resistor 75 is connected in parallel across pins 4 and 5 of the amplifier 71, and the second capacitor 77 is grounded and connected to pin 4 of the amplifier 71 respectively.

[0054] The input end of the circuit breaker 6 is connected to the mains power supply, the current sensing circuit 2 and the power supply circuit 1 are connected to the output end of the circuit breaker 6, the control circuit 3 is connected to the control end of the circuit breaker 6, and the circuit breaker 6 is controlled to switch to achieve a tripping operation in the low power consumption state.

[0055] The low power consumption automatic circuit breaking control method in another embodiment of the present invention includes the following steps:

[0056] S1. Rectify the input power supply and then supply power;

[0057] S2. Output a switching signal according to the change in the magnitude of the supply current;

[0058] S3. Control the on-off of the power supply circuit 1 to the current sensing circuit 2;

[0059] S4. When the switching signal is output, turn on the aperture circuit 4, light up the indicating aperture 5, and then issue a reminder that the electrical appliance is in the standby low power consumption state;

[0060] S5. Control the circuit breaker 6 to switch to achieve a tripping operation in the low power consumption state.

[0061] Furthermore, in step S3, the power supply voltage from the power supply circuit 1 to the aperture circuit 4 is delayed.

[0062] Understandably, the above technical features can be used in any combination without limitation.

[0063] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A low-power automatic circuit breaker controller circuit, characterized in that, it includes: A power supply circuit (1), which supplies power after rectifying the input power supply; A current sensing circuit (2), connected to the power supply circuit (1), for outputting a switching signal according to the change in the magnitude of the supply current; A control circuit (3), respectively connected to the power supply circuit (1) and the current sensing circuit (2), for controlling the on / off of the power supply circuit (1) to the current sensing circuit (2); An aperture circuit (4), respectively connected to the power supply circuit (1) and the current sensing circuit (2), and when the current sensing circuit (2) outputs a switching signal, the aperture circuit (4) is turned on; the aperture circuit (4) includes a triode (41), a first resistor (42) and a second resistor (43) which are connected in parallel and respectively connected to the pin 1 and pin 2 of the triode (41), and a light-emitting diode (44) connected to the pin 3 of the triode (41) and a third capacitor (45) connected to the light-emitting diode (44), the first resistor (42) and the second resistor (43) are connected to the I / O port of the current sensing circuit (2), and after receiving the switching signal of the current sensing circuit (2), the power supply of the aperture circuit (4) is turned on; An indicating aperture (5), electrically connected to the aperture circuit (4), and after the aperture circuit (4) is turned on, the indicating aperture (5) is lit to give a reminder that the electrical appliance is in standby low power consumption; and A circuit breaker (6), which realizes a tripping action in the low-power state; The power supply circuit (1) includes an input circuit (11), an output circuit (12), and a bridge rectifier circuit (13) arranged between the input circuit (11) and the output circuit (12), the input circuit (11) is connected to the output end of the controller circuit, and after rectification, it is supplied with power after being stepped down by AC-DC conversion; The current sensing circuit (2) includes a current sensor (21), which is used to sense the change in the magnitude of the current to open and close to output a switching signal; The input end of the circuit breaker (6) is connected to the mains, the current sensing circuit (2) and the power supply circuit (1) are connected to the output end of the circuit breaker (6), and the control circuit (3) is connected to the control end of the circuit breaker (6), and in the low-power state, the circuit breaker (6) is controlled to switch to realize a tripping action; The controller circuit further includes a delay circuit (7) arranged between the power supply circuit (1) and the aperture circuit (4), and the delay circuit (7) delays the supply voltage of the power supply circuit (1) to the aperture circuit (4); The delay circuit (7) is further connected to the control circuit (3) to provide a driving level for the control circuit (3); The delay circuit (7) includes an amplifier (71), a third resistor (72), a fourth resistor (73), a fifth resistor (74), a sixth resistor (75), a first capacitor (76), and a second capacitor (77); The pin 1 of the amplifier (71) is connected to the power supply circuit (1), the pin 2 is grounded, and the pin 5 is connected to the aperture circuit (4); The third resistor (72) and the fourth resistor (73) are connected in series. The third resistor (72) is grounded, and pins 3 and 5 of the amplifier (71) are respectively connected in parallel across both ends of the fourth resistor (73); The fifth resistor (74) and the first capacitor (76) are connected in series, and the fifth resistor (74) is connected to the power supply circuit (1), and the first capacitor (76) is connected to pin 4 of the amplifier (71); The sixth resistor (75) is connected in parallel across pins 4 and 5 of the amplifier (71), and the second capacitor (77) is grounded and connected to pin 4 of the amplifier (71); The low-power automatic open-circuit control method includes the following steps: S1. Rectify the input power supply and then supply power; S2. Output a switching signal according to the change of the supply current magnitude; S3. Control the on / off of the power supply circuit (1) to the current induction circuit (2); S4. When the switching signal is output, turn on the aperture circuit (4), light up the indicating aperture (5), and then issue a reminder that the electrical appliance is in standby low power consumption; S5. Control the switch of the circuit breaker (6) to perform a tripping operation in the low-power state.

2. The low-power automatic open-circuit controller circuit according to claim 1, characterized in that, In step S3, the supply voltage of the power supply circuit (1) to the aperture circuit (4) is delayed.

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