Washing powder feeding device and feeding method thereof

A washing powder feeding device, comprising a frame, a water pipe, a powder feeding mechanism and a vortex tube body respectively assembled on the frame, wherein an interior of the vortex tube body is defined with a first cylindrical cavity, an intermediate truncated cone cavity and a second cylindrical cavity from top to bottom, the first cylindrical cavity has a larger diameter than the second cylindrical cavity, a water inlet is formed on a side wall of the vortex tube body and communicated with and tangent to the first cylindrical cavity, the water pipe is communicated with the water inlet, and the powder feeding mechanism is configured to feed washing powder into the first cylindrical cavity;

• wherein the frame is a box structure in which the powder feeding mechanism, the vortex tube body and the water pipe are configured, one end of the water pipe is horizontally extended from the box structure, and the second cylindrical cavity of the vortex tube body is connected with a mixed flow pipe arranged in a vertical direction, which is extended from the bottom of the box structure.