Method of and apparatus for testing airtightness of closed...

G - Physics – 01 – M

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G01M 3/26 (2006.01) G01M 3/32 (2006.01)

Patent

CA 2335424

A method and an apparatus A, by which airtightness of a closed space (housing 1) provided with a steam movement control device S is confirmed. The apparatus is provided with an air feed passage (30) and an air exhaust passage (31), which communicate to an interior of a housing (1), the air feed passage (30) being connected to a gas injection device (32), which supplies a gas at a predetermined pressure, and the air exhaust passage (31) being connected to a pressure gauge (33). The method; wherein, while the gas of a predetermined pressure is injected into the housing (1) from the air exhaust passage by the gas injection device (32), pressure measurement is performed in the air exhaust passage (31) from the housing (1), and a measured pressure value is compared with an injection pressure value; and it is recognized that when the measured pressure value is substantially equal to the injection pressure value, airtightness in the housing (1) is maintained, and when the measured pressure value is lower than the injection pressure value, airtightness is lost.

L'invention concerne un procédé et un appareil A permettant de confirmer l'étanchéité à l'air d'un espace clos (logement 1) équipé d'un dispositif S de commande du mouvement de la vapeur. L'appareil comporte un passage (30) d'alimentation en air et un passage (31) d'évacuation d'air, qui communiquent avec l'intérieur d'un logement (1), le passage (30) d'alimentation en air étant relié à un dispositif (32) d'injection de gaz, lequel introduit un gaz à une pression prédéfinie, le passage (31) d'évacuation d'air étant relié à un manomètre (33). Le procédé consiste à mesurer la pression dans le passage (31) d'évacuation d'air en provenance du logement (1) lorsque le gaz à une pression prédéfinie est introduit par le dispositif (32) d'injection de gaz dans le logement (1) via le passage d'évacuation d'air; et à comparer la valeur de pression mesurée avec la valeur de pression d'injection étant entendu que lorsque la valeur de la pression mesurée est sensiblement égale à la valeur d'injection de gaz, l'étanchéité à l'air du logement (1) est maintenue, et que lorsque la valeur de la pression mesurée est inférieure à la valeur de pression d'injection, l'étanchéité à l'air n'est plus garantie.

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