Air cleaning module

An air cleaning module comprising:

• a filter configured to filter a fluid passing therethrough;
• a fan configured to provide a suction direction and a blowing direction of a fluid, wherein the suction direction and the blowing direction are substantially identical;
• a light source unit provided between the fan and the filter to provide a light having a wavelength to sterilize a contaminant source in the fluid;
• a housing providing a fluid flow space, wherein the housing comprises a bottom, a ceiling facing the bottom, and a sidewall;
• and
• a guide unit configured to guide a fluid to move along one or more fluid flow paths set by the guide unit,
• wherein the guide unit comprises a main guide that separates a first space from a second space, the first space including the fluid flow path formed and the second space including no fluid flow path;
• and
• a sensor provided on an inner space of the housing to sense a material in the fluid and disposed in the second space;
• wherein the light source unit comprises:
• a substrate;
• and
• at least one light emitting device mounted on a front surface of the substrate to emit the light,
• wherein the at least one light emitting device includes a first conductive type semiconductor layer, an active layer and a second conductive type semiconductor layer, and wherein the active layer generates the light
• wherein the guide unit further comprises a plurality sub-guides, and one or more fluid flow paths are guided to the light source via the plurality sub-guides.