1. According to the methods of sewage discharge, toilets are mainly divided into four types:
Flush type, siphon flush type, siphon jet type, and siphon vortex type.
(1) Flushing toilet: Flushing toilet is the most traditional and popular method of sewage discharge in mid to low end toilets in China. Its principle is to use the force of water flow to discharge dirt. Its pool walls are usually steep, which can increase the hydraulic force that falls from the water gap around the toilet. Its pool center has a small water storage area, which can concentrate hydraulic power, but it is prone to scaling. Moreover, during use, due to the concentration of flushing water on smaller storage surfaces, significant noise will be generated during sewage discharge. But relatively speaking, its price is cheap and its water consumption is small.
(2) Siphon flush toilet: It is a second-generation toilet that uses the constant pressure (siphon phenomenon) formed by filling the sewage pipeline with flushing water to discharge dirt. Since it does not use hydraulic power to wash away dirt, the slope of the pool wall is relatively gentle, and there is a complete pipeline with a side inverted shape of “S” inside. Due to the increase in water storage area and deeper water storage depth, water splashing is prone to occur during use, and the water consumption also increases. But its noise problem has improved.
(3) Siphon spray toilet: It is an improved version of the siphon flush toilet, which has added a spray attachment channel with a diameter of about 20mm. The spray port is aligned with the center of the inlet of the sewage pipeline, using a large water flow force to push dirt into the sewage pipeline. At the same time, its large diameter water flow promotes the accelerated formation of the siphon effect, thereby accelerating the sewage discharge speed. Its water storage area has increased, but due to limitations in water storage depth, it can reduce odor and prevent splashing. Meanwhile, due to the fact that the jet is carried out underwater, the noise problem has also been improved.
(4) Siphon vortex toilet: It is the highest grade toilet that uses flushing water to flow out from the bottom of the pool along the tangent direction of the pool wall to create a vortex. As the water level increases, it fills the sewage pipeline. When the water level difference between the water surface in the urinal and the sewage outlet of the toilet forms, a siphon is formed, and dirt will also be discharged. In the forming process, the water tank and toilet are integrated to better meet the design requirements of the pipeline, which is called a connected toilet. Because the vortex can produce a strong Centripetal force, which can quickly entangle the dirt in the vortex, and drain the dirt with the generation of siphon, the flushing process is fast and thorough, so it actually uses the two functions of vortex and siphon. Compared to others, it has a large water storage area, low odor, and low noise.
2. According to the situation of the toilet water tank, there are three types of toilets: split type, connected type, and wall mounted type.
(1) Split type: Its characteristic is that the water tank and seat of the toilet are designed and installed separately. The price is relatively cheap, and transportation is convenient and maintenance is simple. But it occupies a large area and is difficult to clean. There are few changes in the shape, and water leakage is prone to occur during use. Its product style is old, and families with limited budgets and limited requirements for toilet styles can choose it.
(2) Connected: It combines the water tank and toilet seat into one. Compared to the split type, it occupies a smaller area, has multiple changes in shape, is easy to install, and is easy to clean. But the production cost is high, so the price is naturally higher than that of split products. Suitable for families who love cleanliness but don’t have time to scrub frequently.
(3) Wall mounted (wall mounted): Wall mounted actually embeds the water tank inside the wall, just like “hanging” on the wall. Its advantages are space saving, drainage on the same floor, and very easy to clean. However, it has extremely high quality requirements for the wall water tank and toilet seat, and the two products are purchased separately, which is relatively expensive. Suitable for households where the toilet has been relocated, without raising the floor, which affects the flushing speed. Some families who prefer simplicity and value quality of life often choose it.
(4) Hidden water tank toilet: The water tank is relatively small, integrated with the toilet, hidden inside, and the style is more avant-garde. Because the small size of the water tank requires other technologies to increase drainage efficiency, the price is very expensive.
(5) No water tank toilet: Most intelligent integrated toilets belong to this category, without a dedicated water tank, relying on basic water pressure to use electricity to drive water filling.
