cross flow fan

Abstract

To reinforce the strength of a cross-flow fan while controlling an increase in flow path loss caused by a reinforcement member of the cross-flow fan such as a support plate. Plural blades (40) extend in a lengthwise direction from a support plate (50). An auxiliary ring (60) is positioned on a lengthwise direction intermediate section of the plural blades (40) and is combined with outer ends (40a) of the plural blades (40). The auxiliary ring (60) is located in a position away from blade base portions (40c) on the support plate side of the blades (40) by a distance equal to or greater than 55% of the long dimension from the blade base portions (40c) to blade distal end portions (40d).

Description

technical field

[0001] The present invention relates to a cross-flow fan, particularly a cross-flow fan having resin-made blades. Background technique

[0002] In the cross-flow fan used in the indoor unit of the air conditioner, a plurality of blades extending in the longitudinal direction are arranged between two disc-shaped or annular support plates arranged at both ends in the longitudinal direction. In addition, as described in Patent Document 1 (Japanese Patent Application Laid-Open No. 05-87086) and the like, a disc-shaped or annular intermediate plate is arranged between two support plates to reinforce the strength of the plurality of blades. .

[0003] Summary of the invention

[0004] The problem to be solved by the invention

[0005] In addition, Patent Document 1 describes a technique in which, when a plurality of support plates are provided, an air volume loss occurs due to the plurality of support plates, resulting in an increase in flow path loss. However,...

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