US 12,270,403 B2
Blower and indoor unit
Hirotaka Sawada, Kanagawa (JP)
Assigned to FUJITSU GENERAL LIMITED, Kanagawa (JP)
Appl. No. 18/277,155
Filed by FUJITSU GENERAL LIMITED, Kanagawa (JP)
PCT Filed Mar. 2, 2022, PCT No. PCT/JP2022/008890
§ 371(c)(1), (2) Date Aug. 14, 2023,
PCT Pub. No. WO2022/209551, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 2021-061997 (JP), filed on Mar. 31, 2021.
Prior Publication US 2024/0117810 A1, Apr. 11, 2024
Int. Cl. F04D 17/04 (2006.01); F04D 29/42 (2006.01); F04D 29/66 (2006.01); F24F 1/0025 (2019.01)
CPC F04D 17/04 (2013.01) [F04D 29/422 (2013.01); F04D 29/663 (2013.01); F24F 1/0025 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A blower, comprising:
a cross flow fan;
a motor configured to rotate the cross flow fan about a rotation axis;
a front tongue part that is arranged in front of the cross flow fan; and
a back tongue part that is arranged in back of the cross flow fan, wherein
a front fan facing surface of the front tongue part, the front fan facing surface facing the cross flow fan, consists of:
a plurality of front non-flat portions on which non-flatness is formed; and
a plurality of front flat portions on which no non-flatness formed,
a back fan facing surface of the back tongue part, the back fan facing surface facing the cross flow fan, consists of:
a plurality of back non-flat portions on which non-flatness formed; and
a plurality of back flat portions on which no non-flatness formed,
the plurality of back non-flat portions respectively face the plurality of front flat portions, with the cross flow fan interposed between the plurality of back non-flat portions and the plurality of front flat portions,
the plurality of back flat portions respectively face the plurality of front non-flat portions, with the cross flow fan interposed between the plurality of back flat portions and the plurality of front non-flat portions, and
the front tongue part and the back tongue part are formed such that the plurality of back non-flat portions do not face the plurality of front non-flat portions.