Range hood fan having filter

Abstract

A range hood fan is constituted of a case main body connected partly to an exhaust gas duct and forming an exhaust gas passage inside the case main body, a fan motor supported by a partition wall in the case main body and having a fan on a rotation shaft, and an exhaust gas suction opening formed in a portion open in a hood main body of the case main body. A first filter is provided at the lower part of the case main body. The first filter is formed by net structure through which gas containing oily smoke can be passed and has first grooves which are extended in a rotation direction of the fan and end portions of which are open in the exhaust gas passage. A second filter is provided inside the first filter. The second filter is formed by net structure through which gas containing oily smoke can be passed and has second grooves that are larger than the first grooves and are open in the exhaust gas passage. The gas sucked by the fan through the exhaust gas suction opening is caused to flow along each of the second grooves and of the first grooves, so that oily smoke is liquefied and collected.

1 . A range hood fan ( 100 ), which is used in a range hood collecting oily-smoke-containing gas generated from cookers such as pots and pans during cooking, and evacuating the oily-smoke-containing gas to the outdoor through an exhaust gas duct, and is installed in a hood main body, 
 the range hood comprising a case main body connected partly to an exhaust gas duct and forming an exhaust gas passage inside the case main body, a fan motor having a fan on a rotation shaft and being supported by a partition wall in the case main body, and an exhaust gas suction opening formed in a portion opening in the hood main body in the case main body,    the range hood further comprising a first filter being provided at a lower part of the case main body by net structure through which the oily-smoke-containing gas can be passed and having first grooves extended in a rotation direction of the fan and end portions of which are open in a exhaust gas passage, and a second filter provided inside the first filter, the second filter being formed by net structure through which the oily-smoke-containing gas can be passed and having second grooves that are larger than the first grooves and end portions of which are open in the exhaust gas passage,    the first filter and the second filter liquefying and collecting the oily smoke of the gas by flowing the gas, which sucked from exhaust gas suction opening by a fan, along each of the second grooves and of the first grooves.    
   
   
       2 . The range hood according to  claim 1 , wherein a bottom of the case main body having a opening and closing lid opening a exhaust gas passage, and the first filter and the second filter being detachably attached on an inner surface of the opening and closing lid.