3results about How to "Prevent backfeeding" patented technology

This application discloses an auxiliary power supply module and a power distribution terminal, belonging to the field of power supply. The auxiliary power supply module includes a charging circuit, an energy storage unit, a power failure detection delay circuit, a boost circuit, and a power output terminal. The charging circuit is connected to the energy storage unit and is used to charge the energy storage unit using the main power supply voltage when the main power supply voltage is normal. The power failure detection delay circuit is connected to both the charging circuit and the boost circuit and is used to output a working voltage to the boost circuit when the main power supply voltage is less than a first target voltage for a target duration. The energy storage unit is connected to the boost circuit and is used to output a stored energy voltage to the boost circuit. The boost circuit is connected to the power output terminal and is used to supply power at the working voltage, converting the stored energy voltage into a supply voltage and providing it to the power output terminal. The supply voltage is used to power the power distribution terminal. This application can improve the service life of the auxiliary power supply module and improve the stability of power supply.

The application discloses a low-cost output redundancy circuit, comprising a square wave module, a gate driver, a bootstrap module, MOS tube Q1, MOS tube Q2, capacitor C6 and capacitor C7; a voltage is applied to a signal input end of the square wave module; a signal output end of the square wave module is connected with an input end of the gate driver; an output end of the gate driver is connected with an input end of the bootstrap module; control ends of the bootstrap module are connected with a gate of the MOS tube Q1 and a gate of the MOS tube Q2 respectively; a source of the MOS tube Q1 and a source of the MOS tube Q2 are both inputted with a first voltage VOUT1; a drain of the MOS tube Q1 and a drain of the MOS tube Q2 are both outputted with a second voltage VOUT2; and the application solves the problem that a large number of chips in a redundancy circuit causes a high product cost, and realizes the technical effect of reducing product cost on the premise of realizing the redundancy function of the circuit.

This utility model relates to the technical field of domestic sewage treatment equipment, and discloses a non-powered domestic sewage purification device based on composite filter media. It includes a screen well with a liftable interceptor cylinder inside, which can pre-intercept and easily clean large particles of debris in the influent; a pretreatment sedimentation chamber to achieve solid-liquid separation of sludge and sediment; and sewage entering the composite filter media purification chamber through an overflow channel. The purification chamber contains layered composite filter media bags, composed of modified ceramsite, zeolite particles, and biochar, which, combined with a ventilation component, provide natural convection oxygen supply, achieving deep purification through sewage adsorption and biodegradation. The tank adopts a split-sealed structure with annular reinforcing ribs and a permeable material-blocking structure, ensuring overall structural stability and preventing clogging and leakage. This utility model requires no power equipment, has low energy consumption, is easy to operate and maintain, and exhibits strong purification stability. It is suitable for decentralized on-site domestic sewage treatment scenarios such as rural households and small residential areas, and has high application and promotion value.