What does siphon double flush mean?

Siphon dual-flush toilet (patentNo.: 20 12 10074828) includes a water tank, a cylinder, a water inlet, an injection pipe and a sewage pipe; The water inlet is communicated with the water tank; The sewage pipe is communicated with the bottom of the cylinder; The injection pipe is independent of the cylinder body and located between the bottom of the cylinder body and the water inlet. One end of the injection pipe is provided with an injection water inlet communicated with the water inlet, and the other end is provided with an injection water outlet communicated with the bottom of the cylinder body. Because the invention adopts the post design of the injection pipe independent of the cylinder body, the injection pipe is no longer connected with the cylinder body into a whole, and the water in the water tank does not need to go around the front end of the toilet bowl from the injection pipe, but is directly injected into the sewage pipe from the back injection pipe, so that the direction of the water injected into the sewage pipe from the injection pipe is unchanged, and the energy is basically not lost; under the condition of little water, the instantaneous flow rate and flow rate of water flow are improved, which is helpful to start siphoning and effectively remove pollutants. (Source: Applied Technology Network)