There is always a smell in the bathroom, our family is very hygienic, and there is an exhaust fan in

It's actually normal for the bathroom to smell. In addition to the odor caused by your family, in fact, the pipes will also emit some odors, and the source of these odors may be upstairs or downstairs.

This smell is not yours, it's the problem of the floor drain, it's the smell of other people's homes, you can change it to an anti-odor floor drain.

First of all, confirm whether the source of the smell is discharged from the floor drain or imported by the air duct, and then treat it according to the source!

There are generally two sources of odor, the first is the floor drain, to see if it is odor-proof, and the second is the pipe connected to the exhaust fan you said, and a one-way damper is installed to solve it.

There is no trap in the sewer pipe, so find a way to store the trap

The main reason for the smell in the bathroom is that the water seal on the drainage appliance is invalid or there is no water seal, if the drain has a water seal, that is, the negative pressure of the pipe sucks the water in the water seal, and the smell of the drainage pipe without water seal protection will enter the room, it is useless to pump with an exhaust fan, you can go to Taobao to search for the British green future suction valve, the suction valve is specially designed to protect the water seal in the water trap, which can solve the odor problem, and can also increase the drainage speed, this suction valve is best bought imported, durable, and in line with industry standards.