Improved heat gun fan assembly

F - Mech Eng,Light,Heat,Weapons – 24 – H

Patent

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Details

F24H 3/04 (2006.01) F04D 17/16 (2006.01) F04D 25/08 (2006.01)

Patent

CA 2276592

A heat gun having a fan assembly (10) for use therein having a flow straightener (48) to reduce turbulence in air passing through the fan assembly (10). The fan assembly (10) also includes a blower housing (14) with a reduced diameter outlet (92), a relatively large diameter radial flow impeller (36), and an electric motor (10) to rotate the impeller (36). The flow straightener (48) includes a plurality of vanes (50), and curved radially interior and exterior walls (47, 49). The motor (60) includes apertures (68, 70) in upstream and downstream ends and apertures in a cylindrical sidewall.

La présente invention concerne un pistolet thermique équipé d'un ensemble soufflante (10) comportant un redresseur de flux (48) destiné à réduire la turbulence de l'air traversant l'ensemble soufflante (10). Cet ensemble soufflante (10) comporte également une buse carénée (14) dont le diamètre diminue vers l'orifice de sortie (92), une turbine à flux radial (36) et un moteur électrique (10) animant la turbine (36) d'un mouvement de rotation. Le redresseur de flux (48) comporte une pluralité de pales (50) ainsi que des parois intérieures et extérieures (47, 49) radialement incurvées. Le moteur (60) comporte des ouvertures (68, 70) en ses extrémités amont et aval de même que dans une paroi latérale cylindrique.

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