FIELD: electricity.
SUBSTANCE: casing of the device with electric drive, which is used in the conditions in which there is danger of explosions, includes loud-speaker connected to electric part. At that, loud-speaker and electric part except electric connection are fully enclosed with casing consisting of gas-permeable and noncombustible material. Invention also refers to the casing of the device with electric drive, which contains light source, as well as the method for obtaining porous material for these casings.
EFFECT: release of pressure drop in case of explosion, owing to the casing itself, capability of discharging the mixture of ignited gases through casing walls to the outside; prevention of the medium ignition outside the casing, cooling action of the casing material on evolved gases, and capability of acoustic waves to penetrate to the outside without attenuation.
14 cl, 3 dwg
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