Pyrotechnic inflator using a thermoelectric device

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 21/26 (2006.01)

Patent

CA 2219320

A pyrotechnic inflator (52) using a thermoelectric device (100) decreases the temperature and pressure of a gas generated when the explosive (55) of the inflator (52) is detonated to simplify the structure thereof. The inflator includes the thermoelectric device (100) for receiving a power from an electronic control unit (53) to cool an inflator housing (56) in a predetermined temperature, and a linear flow passage (150) therein. A metal filter (66) is installed to one side of the flow passage (150) for eliminating minute particles included in the gas generated during the detonation of the explosive (55) and lowering the temperature of the gas. Upon the power supply to the inflator, the inflator housing (56) is cooled to reduce the temperature of the gas generated when the explosive (55) of the inflator is detonated and to decrease the peak explosion pressure, thereby simplifying the structure and facilitating the manufacturing of the inflator.

Un gonfleur pyrotechnique (52) muni d'un dispositif thermoélectrique (100) abaisse la température et la pression du gaz produit lorsque la charge explosive (55) du gonfleur (52) détone, ce qui permet de simplifier la structure de celui-ci. Le gonfleur comprend le dispositif thermoélectrique (100), commandé par une unité de commande électronique (53) afin de refroidir une chambre du gonfleur (56) jusqu'à un niveau de température prédéterminé, et un couloir d'écoulement linéaire (150) à l'intérieur de celle-ci. Un filtre métallique (66), installé sur un côté du passage de l'écoulement (150), élimine les particules fines transportées par le gaz produit au cours de la détonation de la charge explosive (55) et abaisse la température du gaz. Au moment où le gonfleur est alimenté en énergie, la chambre (56) du gonfleur est refroidie, ce qui abaisse la température du gaz produit lorsque la charge explosive (55) du gonfleur détone et réduit la pression maximum d'explosion, ce qui permet de simplifier la structure et facilite la fabrication du gonfleur.

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