False kitchen ceiling with liquid spray system for cleaning

A false ceiling for protecting supporting ceilings of industrial kitchens, slaughter houses, laundries and the like, against rising vaporous clouds and precipitation of particles contained therein, comprising adjacent ceiling panels having inclined lower surfaces, collecting channels positioned below the lower edges of said ceiling panels, an exhaust port positioned above said ceiling panels to remove vapors thereabove, spray nozzles for supplying liquid films to said lower surfaces, cruciform and T-shaped pieces with grooves therein mountingly receiving ends of said collecting channels, and liquid retaining plates mounted in said grooves adjacent the ends of said collecting channels.