When the weather is hot, there is always an odor in the bathroom (mainly from the sewer), so seek a simple and labor-saving method to remove the odor.

It seems that your floor drain is not odor-proof.

If you want a simple solution, you can't change the floor drain. You can slowly pour boiling water into it to kill the bacteria and microorganisms inside, which can play some role, but it may appear again in a few days.

You can also buy some disinfectant for clothes, or add water to 84 disinfectant in proportion and pour some every few days.

If the smell is very strong, all the above methods are invalid, which means that your sewer is not equipped with double U-shaped pipes, and it is impossible to isolate the smell in the main pipeline. It just came out. If it is a floor drain, there is really no other way but to replace it with an odor-resistant floor drain. If it's a sink, check it yourself. If it doesn't exist, wrap the corrugated pipe under the sink around it and tie it up with wires to make a U-shaped pipe. Then use a plastic bag to plug the joint between the corrugated pipe and the lower PVC to prevent air leakage. The principle is that some water can be accumulated at the position of the U-shaped pipe to prevent the odor of the main pipe from overflowing.

If you really don't understand, ask again. I'll draw you a schematic diagram.