2results about How to "Prevent siphon phenomenon" patented technology

The application discloses a gas-water diversion anti-siphon device, which comprises a water storage tank body, a water inlet pipe joint, a water outlet pressure-limiting backflow valve assembly, a pressure-loss air inlet valve assembly and a pressure-loss water outlet valve assembly. The water inlet pipe joint is arranged at the upper half of the water storage tank body and is connected with a water supply pipe network. The water outlet pressure-limiting backflow valve assembly is arranged at the lower half of the water storage tank body and is connected with downstream water using appliances. The pressure-loss air inlet valve assembly and the pressure-loss water outlet valve assembly are arranged at the top end and the bottom end of the water storage tank body, respectively. When the water supply pipe network is shut down and negative pressure is generated, the pressure-loss air inlet valve assembly is opened to enable air to enter the water storage tank body and flow into the water supply pipe network through the water inlet pipe joint. Meanwhile, the pressure-loss water outlet valve assembly is opened to discharge the accumulated water in the water storage tank body. Meanwhile, the water outlet pressure-limiting backflow valve assembly is closed to prevent downstream water from flowing back into the water storage tank body.

The utility model discloses an anti-siphon connector for an external filter tank, the connector is provided with an ascending end and a descending end which are communicated with each other, the ascending end is communicated with a water inlet, the descending end is communicated with a water inlet end of a water pump, the descending end is also provided with a notch, and the notch is communicated with a water storage bin; an air inlet is further formed in the rising end and communicated with a water outlet nozzle of the water pump. The ascending end and the descending end of the connector are communicated with the water inlet end of the water pump, and the ascending end and the air inlet communicated with the water outlet nozzle are combined, so that a closed-loop air path can be formed, siphonage after the water pump is powered off can be prevented, the water amount in the water storage bin is maintained, and the problems of dry burning of the water pump, backflow of the filter box and the like caused by power failure are effectively solved.