A virtual olfactory device based on PLC control, belonging to the field of virtual olfactory technology, can provide users with virtual olfactory stimuli quantitatively, regularly and quantitatively, realize virtual olfactory, and enrich people's sensory experience. It includes washing box, battery,
gas cylinder, cage, Mitsubishi PLC, box cover, configuration screen and exhaust fan. The technical problem to be solved is: currently there are almost no virtual olfactory devices on the market. People create the desired olfactory environment by pointing incense and spraying perfume. The type of taste is single, the operation is inconvenient, and the displacement is not easy to control, so the quality of the olfactory experience brought is not high. The beneficial effects of the present invention are: multiple gases can be discharged separately and mixed gases of multiple gases can be discharged at the same time, multiple functions can be simulated; based on PLC control, the degree of
automation is high and the efficiency is high; the configuration screen provides a human-computer
interaction interface , easy to operate and high reliability.