Rotary air chamber infrared gas detection device

The invention discloses a rotary air chamber infrared gas detection device. The infrared gas detection device comprises an air chamber, an optical filter, an optical filter switching layer, an infrared detector, a detector base, an infrared light source and a light source base. Wherein the gas chamber comprises a cylindrical housing and an internal gas detection area, and two gas holes are formedin the side surface of an external cylindrical structure; the optical filter switching layer is of a circular structure of which the diameter is the same as that of the air chamber, and is used for fixing optical filters with different wavelengths; the two infrared detectors are fixed with the infrared air chamber through the detector base; and the infrared light source is fixed on the light source base and is fixed with the air chamber through a binding site. Compared with the condition that the existing detection gas is single, the detection of various gases is realized by rotating the optical filter switching layer