Toilet, commonly known as toilet. Why do people call a toilet when sitting in a bucket? This dates back to the "Trojan horse" in Ouyang Xiu's "returning to the second record" in the Northern Song Dynasty, which was an early written record of the toilet.

Washdown the toilet uses the impulse of water flow to discharge poop. Generally, the pool wall is steep and the water storage area is small, so the hydraulic power is concentrated, and the falling hydraulic power around the seat ring is plus-sized, and the flushing efficiency is high.

Advantages: Washdown toilet flush pipe is simple, short path, thick pipe diameter (generally 9 to 10cm in diameter), can use specific gravity of water acceleration to flush the poop clean, the flushing process is short, compared with siphon type, in terms of cleaning capacity, washdown the toilet has no return bend and adopts direct Flushing, which is easy to flush down larger dirt. It is not easy to cause blockage during washing, and there is no need to set wastebasket in the toilet. In terms of water saving, it is also better than siphon toilet.

Disadvantages: The big defect of the Washdown toilet is that the flushing sound is loud, and because the water surface is small, scaling is easy to occur, and the deodorant work is not as good as the siphon toilet. In addition, currently, there are relatively few types of Washdown toilet in the market, and the selection surface is not as large as siphon toilet.

Siphon

the structure of siphon toilet is that the drainage pipe is of "-" type, and a certain water level difference will occur after the drainage pipe is filled with water, take the suction generated by the Flushing water within wall-hung urinal to drain the poop away. Because the siphon toilet flush is not driven by the impulse of water flow, the water surface in the pool is relatively large and the flushing noise is relatively small. Siphon toilet is also divided into two types: Vortex siphon and Jet siphon.

(1) vortex siphon

the flush port of the toilet is located on one side of the bottom of the toilet. When flushing, the water flow forms a vortex along the pool wall, which will plus-sized the flushing force of the water flow on the pool wall and also Plus-sized the suction force of siphon, it is better to drain the internal organs of the toilet.

(2) Jet siphon

A further improvement has been made on the siphon toilet. A spray auxiliary channel is added to the bottom of the toilet to aim at the center of the drain outlet. When flushing, part of the water flows out from the water hole around seat ring, part of it is sprayed out by injection orifice. This kind of toilet is to quickly wash away the dirt on the basis of siphon with the help of large water impulse.

Advantages: The great advantage of siphon toilet is low flushing noise, which is called mute. From the aspect of cleaning ability, siphon is easy to wash away the dirt adhering to the toilet surface, because siphon has high water storage and deodorant effect is better than washdown. Now there are many kinds of siphon toilet on the market, there will be more choices to buy a toilet.

Disadvantages: When flushing the siphon toilet, water must be poured to the very high water surface before the dirt is flushed down. Therefore, it is necessary to have a certain amount of water to achieve the purpose of Flushing, which is relatively expensive. Siphon drainage pipe diameter is about 56mm, easy to block when flushing, so bung fodder can not be directly thrown in the toilet, the installation of siphon toilet usually need to be equipped with wastebasket and chopsticks.