Right now I can not direct the air to the outside. So I built a small carbon filter for my spray booth. It does not completely solve the problem, but reduces the fumes more than before.
Later I can use the thread to attach a hose.

2022/02/24: Fusion 360 and pdf files added.

Print instructions

Resolution 0.2mm
Infill: 10% (doesn't matter)
Supports, Rafts: no