Light therapy device for cosmetic and medical use, e.g. for UV light treatment has a ventilation arrangement that ensures a filter does not quickly become blocked with dust or overheat

摘要

Light therapy device has a housing (1) with an internal light source (2), a ventilator (3) for active supply of cooling air into the housing via openings (4-6) and a holder (7) for a plate shaped filter element. The ventilator and one of the ventilation openings (6) is configure so that when the ventilator is switched on cool air from the other two openings (4, 5) is fed along both sides of the filter support to cool the filter.