Reverse connection prevention breaker
By adding a comparison circuit between the external switch of the intelligent on-breaker and the control processing module, the problem of damage caused by zero-fire reverse connection of the intelligent on-breaker is solved, and the normal operation and safety control of the equipment are achieved.
Patent Information
- Application Number
- CN202421348283.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-13
AI Technical Summary
The existing intelligent on-off device has caused the control switch to close and close error due to the reverse connection of zero-fire wire, and directly introduces 85-265V AC power into the processing module, resulting in permanent damage to the equipment.
An anti-reverse on-off device is designed. By adding a comparison circuit between the external switch and the control processing module, the output signal of the comparison circuit is used to control the connection or disconnection of the on-off module to avoid AC power directly contacting the control processing module.
Whether the external switch is connected to the live wire or the neutral wire, the AC power cannot be directly connected to the GPIO interface of the control processing module, avoiding permanent damage to the control processing module and solving the problem of damage caused by the reverse connection of the traditional on-off device.
Smart Images
Figure CN222673919U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuits, in particular to an anti-reverse connection switch. Background Art
[0002] The processing module of the intelligent switcher controls the connection or disconnection of the switcher module by obtaining the high level or low level of the output end of the control switch, thereby realizing the control of the load electrical appliance. The current non-isolated power supply intelligent switcher is controlled by connecting the control switch to the live wire or the neutral wire. The control switch of the existing intelligent switcher is generally connected to the live wire to realize control. If the control switch is mistakenly connected to the neutral wire, the closing of the control switch will cause 85-265V AC power to directly reach the processing module of the intelligent switcher, causing permanent damage to the intelligent switcher. Utility Model Content
[0003] In view of this, the utility model provides an anti-reverse connection switch, which is used to solve the problem that the intelligent switch in the prior art is damaged due to the reverse connection of the neutral and live wires.
[0004] To achieve one or part or all of the above purposes or other purposes, the utility model proposes: an anti-reverse connection switch, used to connect an external switch SW1 to control the operation of a load, the anti-reverse connection switch comprising: a control processing module, a switch module, a comparison circuit and a power supply circuit;
[0005] The input end of the comparison circuit is connected to the live wire or the neutral wire through an external switch SW1, and the output end of the comparison circuit is connected to the control processing module;
[0006] The power circuit is connected to the live wire and the neutral wire, and the power circuit is electrically connected to the control processing module, the power circuit is electrically connected to the on-off module, and the on-off module is provided with an output interface for connecting the load;
[0007] The control processing module controls the connection or disconnection of the on-off module by acquiring the signal of the output end of the comparison circuit.
[0008] Preferably, the control processing module is connected to the output end of the comparison circuit by setting a GPIO interface; the GPIO interface exhibits a high level or a low level by acquiring a signal from the output end of the comparison circuit;
[0009] When the GPIO interface is at a high level, the control processing module controls the on-off module to disconnect;
[0010] When the GPIO interface is at a low level, the control processing module controls the on-off module to be connected.
[0011] Preferably, the control processing module is a ZTU module with a built-in Zigbee network protocol.
[0012] Preferably, the power supply circuit is an AC-DC conversion circuit.
[0013] Preferably, the comparison circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a diode D1, a diode D2, a capacitor C1 and a comparator U1;
[0014] The output end of the comparator U1 is the output end of the comparison circuit, the output end of the comparator U1 is connected to the GPIO interface, and the output end signal of the comparator U1 is a digital signal;
[0015] The inverting end of the comparator U1 is connected to one end of the resistor R1 and one end of the resistor R2 respectively, the other end of the resistor R1 is connected to GND, and the other end of the resistor R2 is connected to VCC;
[0016] The non-phase end of the comparator U1 is respectively connected to the anode of the diode D1, one end of the resistor R3 and one end of the capacitor C1, the other end of the capacitor C1 is connected to GND, the other end of the resistor R3 is connected to VCC, the cathode of the diode D1 is connected in series with the resistor R4 and the resistor R5 and then connected to the external switch SW1, the cathode of the diode D2 is also connected to the cathode of the diode D1, and the anode of the diode D2 is connected to GND.
[0017] Preferably, when the input end of the comparison circuit is connected to the live wire through the external switch SW1, the external switch SW1 is disconnected, the positive phase end of the comparator U1 is pulled up to VCC by the resistor R3, the voltage of the positive phase end of the comparator U1 is higher than the voltage of the negative phase end, and the GPIO interface is at a high level;
[0018] The external switch SW1 is closed, and the voltage at the positive terminal of the comparator U1 is divided by the resistor R3, the diode D1, the resistor R4 and the resistor R5. The voltage at the positive terminal of the comparator U1 is lower than the voltage at the negative terminal, and the GPIO interface is at a low level.
[0019] Preferably, when the input end of the comparison circuit is connected to the neutral line through the external switch SW1, the external switch SW1 is disconnected, the positive phase end of the comparator U1 is pulled up to VCC by the resistor R3, the voltage of the positive phase end of the comparator U1 is higher than the voltage of the negative phase end, and the GPIO interface is at a high level;
[0020] When the external switch SW1 is closed, the AC power is half-wave rectified and filtered into DC power by the diode D2 and the capacitor C1. The DC power is divided by the resistor R3, the diode D1, the resistor R4 and the resistor R5 and then supplied to the positive terminal of the comparator U1, so that the voltage at the positive terminal of the comparator U1 is lower than the voltage at the negative terminal, and the GPIO interface is at a low level.
[0021] Implementing the embodiments of the present utility model will have the following beneficial effects:
[0022] After adopting the above-mentioned anti-reverse connection switch, by adding a comparison circuit between the external switch SW1 and the control processing module, the control processing module obtains the digital signal on the output end of the comparison circuit to make the GPIO interface show a high level or a low level, thereby enabling the control processing module to connect or disconnect the switch module. Based on this, when the external switch S1 is connected to the live wire or the neutral wire, the AC power connected to the mains cannot be directly connected to the GPIO interface of the control processing module, thereby avoiding permanent damage to the control processing module. That is, no matter whether the installer connects the anti-reverse connection switch to the live wire or the neutral wire through the external switch SW1, the internal control processing module can work normally, thereby solving the problem of damage to the traditional switch due to reverse connection of the live and neutral wires. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] in:
[0025] Figure 1 The present invention is a schematic diagram of the circuit structure of the anti-reverse connection switch. DETAILED DESCRIPTION
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.
[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.
[0029] like Figure 1 The example shown is an embodiment provided by the utility model.
[0030] An embodiment of the utility model provides an anti-reverse connection switch, which is used to connect an external switch SW1 to control the operation of a load. The anti-reverse connection switch includes a control processing module, an on-off module, a comparison circuit and a power supply circuit; the input end of the comparison circuit is connected to the live wire or the neutral wire through the external switch SW1, and the output end of the comparison circuit is connected to the control processing module; the power supply circuit connects the live wire and the neutral wire, and the power supply circuit is electrically connected to the control processing module, the power supply circuit is electrically connected to the on-off module, and an output interface for connecting a load is provided on the on-off module; the control processing module controls the connection or disconnection of the on-off module by obtaining a signal from the output end of the comparison circuit.
[0031] Specifically, the load can be various household appliances, which are connected to the output interface of the on-off module and the neutral line through a wire. The on-off module is turned on or off to control the load. The on-off module can use relays, thyristors or MOS tubes to realize on / off. The external switch SW1 can use panel switches, rocker switches, smart switches and other types, which are selected by the user. In this embodiment, a GPIO interface is provided on the control processing module, and the GPIO interface is connected to the output end of the comparison circuit. The GPIO interface exhibits a high level or a low level by obtaining a digital signal from the output end of the comparison circuit. When the GPIO interface is at a high level, the control processing module controls the on-off module to be disconnected; when the GPIO interface is at a low level, the control processing module controls the on-off module to be connected. Specifically, this embodiment adds a comparison circuit between the external switch SW1 and the control processing module, so that the control processing module obtains the digital signal on the output end of the comparison circuit to make the GPIO interface show a high level or a low level, thereby enabling the control processing module to connect or disconnect the on-off module. Based on this, when the external switch S1 is connected to the live wire or the neutral wire, the AC power connected to the mains cannot be directly connected to the GPIO interface of the control processing module, thereby avoiding permanent damage to the control processing module. That is, no matter whether the installer connects the anti-reverse connection switch to the live wire or the neutral wire through the external switch SW1, the internal control processing module can work normally, thereby solving the problem of traditional switches being damaged due to reverse connection of the live and neutral wires.
[0032] It should also be noted that the control processing module uses the existing ZTU module, which has a built-in Zigbee network protocol and a low-power 32-bit CPU core embedded in the ZTU module to facilitate the control of the on-off module. The power supply circuit is an AC-DC conversion circuit, which converts the AC power input from the mains into low-voltage DC power.
[0033] As attached Figure 1 As shown, the comparison circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a diode D1, a diode D2, a capacitor C1 and a comparator U1;
[0034] The output end of the comparator U1 is the output end of the comparison circuit, the output end of the comparator U1 is connected to the GPIO interface, and the output end signal of the comparator U1 is a digital signal;
[0035] The inverting end of the comparator U1 is connected to one end of the resistor R1 and one end of the resistor R2 respectively, the other end of the resistor R1 is connected to GND, and the other end of the resistor R2 is connected to VCC;
[0036] The non-phase end of the comparator U1 is respectively connected to the anode of the diode D1, one end of the resistor R3 and one end of the capacitor C1, the other end of the capacitor C1 is connected to GND, the other end of the resistor R3 is connected to VCC, the cathode of the diode D1 is connected in series with the resistor R4 and the resistor R5 and then connected to the external switch SW1, the cathode of the diode D2 is also connected to the cathode of the diode D1, and the anode of the diode D2 is connected to GND.
[0037] In this embodiment, the sum of the resistances of the resistors R3 , R4 and R5 connected to the non-inverting terminal of the comparator U1 is greater than the sum of the resistances of the resistors R1 and R2 connected to the inverting terminal of the comparator U1 .
[0038] Specifically, when the input end of the comparison circuit is connected to the live wire through the external switch SW1, the external switch SW1 is disconnected, the positive phase end of the comparator U1 is pulled up to VCC by the resistor R3, the voltage of the positive phase end of the comparator U1 is higher than the voltage of the negative phase end, and the GPIO interface is at a high level;
[0039] The external switch SW1 is closed, and the voltage at the positive terminal of the comparator U1 is divided by the resistor R3, the diode D1, the resistor R4 and the resistor R5. The voltage at the positive terminal of the comparator U1 is lower than the voltage at the negative terminal, and the GPIO interface is at a low level.
[0040] As attached Figure 1 As shown by the dotted line in, when the input end of the comparison circuit is connected to the neutral line through the external switch SW1, the external switch SW1 is disconnected, and the positive phase end of the comparator U1 is pulled up to VCC by the resistor R3. The voltage of the positive phase end of the comparator U1 is higher than the voltage of the negative phase end, and the GPIO interface is at a high level;
[0041] When the external switch SW1 is closed, the AC power is half-wave rectified and filtered into DC power by the diode D2 and the capacitor C1. The DC power is divided by the resistor R3, the diode D1, the resistor R4 and the resistor R5 and then supplied to the positive terminal of the comparator U1, so that the voltage at the positive terminal of the comparator U1 is lower than the voltage at the negative terminal, and the GPIO interface is at a low level.
[0042] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.
Claims
1. An anti-reverse connection switch, used to connect an external switch SW1 to control the operation of a load, characterized in that: include: Control processing module, on-off module, comparison circuit and power supply circuit; The input end of the comparison circuit is connected to the live wire or the neutral wire through an external switch SW1, and the output end of the comparison circuit is connected to the control processing module; The power circuit is connected to the live wire and the neutral wire, and the power circuit is electrically connected to the control processing module, the power circuit is electrically connected to the on-off module, and the on-off module is provided with an output interface for connecting the load; The control processing module controls the connection or disconnection of the on-off module by acquiring the signal of the output end of the comparison circuit.
2. The anti-reverse connection switch according to claim 1, characterized in that: The control processing module is connected to the output end of the comparison circuit by setting a GPIO interface; the GPIO interface obtains a signal at the output end of the comparison circuit to show a high level or a low level; When the GPIO interface is at a high level, the control processing module controls the on-off module to disconnect; When the GPIO interface is at a low level, the control processing module controls the on-off module to be connected.
3. The anti-reverse connection switch according to claim 2, characterized in that: The control processing module is a ZTU module with a built-in Zigbee network protocol.
4. The anti-reverse connection switch according to claim 3, characterized in that: The power supply circuit is an AC-DC conversion circuit.
5. The anti-reverse connection switch according to claim 4, characterized in that: The comparison circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a diode D1, a diode D2, a capacitor C1 and a comparator U1; The output end of the comparator U1 is the output end of the comparison circuit, the output end of the comparator U1 is connected to the GPIO interface, and the output end signal of the comparator U1 is a digital signal; The inverting end of the comparator U1 is connected to one end of the resistor R1 and one end of the resistor R2 respectively, the other end of the resistor R1 is connected to GND, and the other end of the resistor R2 is connected to VCC; The non-phase end of the comparator U1 is respectively connected to the anode of the diode D1, one end of the resistor R3 and one end of the capacitor C1. The other end of the capacitor C1 is connected to GND, and the other end of the resistor R3 is connected to VCC. The cathode of the diode D1 is connected in series with the resistor R4 and the resistor R5 and then connected to the external switch SW1. The cathode of the diode D2 is also connected to the cathode of the diode D1. The anode of the diode D2 is connected to GND.
6. The anti-reverse connection switch according to claim 5, characterized in that: When the input end of the comparison circuit is connected to the live wire through the external switch SW1, the external switch SW1 is disconnected, and the positive end of the comparator U1 is pulled up to VCC by the resistor R3. The voltage of the positive end of the comparator U1 is higher than the voltage of the negative end, and the GPIO interface is at a high level. The external switch SW1 is closed, and the voltage at the positive terminal of the comparator U1 is divided by the resistor R3, the diode D1, the resistor R4 and the resistor R5. The voltage at the positive terminal of the comparator U1 is lower than the voltage at the negative terminal, and the GPIO interface is at a low level.
7. The anti-reverse connection switch according to claim 5, characterized in that: When the input end of the comparison circuit is connected to the neutral line through the external switch SW1, the external switch SW1 is disconnected, and the positive phase end of the comparator U1 is pulled up to VCC by the resistor R3. The voltage of the positive phase end of the comparator U1 is higher than the voltage of the negative phase end, and the GPIO interface is at a high level. When the external switch SW1 is closed, the AC power is half-wave rectified and filtered into DC power by the diode D2 and the capacitor C1. The DC power is divided by the resistor R3, the diode D1, the resistor R4 and the resistor R5 and then supplied to the positive terminal of the comparator U1, so that the voltage at the positive terminal of the comparator U1 is lower than the voltage at the negative terminal, and the GPIO interface is at a low level.