A cross-flow fan includes an impeller and a shaft. The impeller includes a plurality of support plates and a plurality of blades. The blades are different in a blade cross section orthogonal to an impeller rotational axis, and each have a plurality of regions arranged in a direction of the impeller
A cross-flow fan includes an impeller and a shaft. The impeller includes a plurality of support plates and a plurality of blades. The blades are different in a blade cross section orthogonal to an impeller rotational axis, and each have a plurality of regions arranged in a direction of the impeller rotational axis and a coupling portion formed so as to couple the plurality of regions to each other. A rib is formed on the coupling portion, or formed in a region adjacent to the coupling portion within a range separated away from the coupling portion by up to 20% of a length of the region adjacent to the coupling portion in the rotational axis direction.
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1. A cross-flow fan, comprising: an impeller; anda shaft supporting the impeller in a rotatable manner,the impeller comprising: a plurality of support plates; anda plurality of blades arranged at intervals in a circumferential direction between a corresponding pair of the plurality of support plates
1. A cross-flow fan, comprising: an impeller; anda shaft supporting the impeller in a rotatable manner,the impeller comprising: a plurality of support plates; anda plurality of blades arranged at intervals in a circumferential direction between a corresponding pair of the plurality of support plates,each of the plurality of blades comprising a plurality of regions different in a blade cross section orthogonal to an impeller rotational axis,the plurality of regions being arranged in a direction of the impeller rotational axis in the blade,each of the plurality of blades further comprising a coupling portion for coupling the plurality of regions to each other,each of the plurality of blades comprising at least one rib formed on the coupling portion or a region adjacent to the coupling portion, wherein:the rib has a rib outer peripheral end portion and a rib inner peripheral end portion that are inclined surfaces formed tangent to an arc-shaped blade outer peripheral end portion and an arc-shaped blade inner peripheral end portion, respectively; andthe rib outer peripheral end portion and the rib inner peripheral end portion each have a leading end formed into an arc shape. 2. The cross-flow fan according to claim 1, wherein: the blade comprises, as the plurality of regions, at least one pair of first regions, a second region, and at least one pair of third regions;each of the first regions is a part adjacent to the support plate in a state in which the impeller is formed;the second region is a part positioned between a corresponding pair of the first regions;each of the third regions is positioned between the corresponding pair of the first regions and between the second region and the corresponding first region;the first region and the third region are each coupled to each other by the coupling portion, and the second region and the third region are each coupled to each other by the coupling portion; andthe first region, the second region, and the third region have different blade outlet angles from each other. 3. The cross-flow fan according to claim 1, wherein the coupling portion is formed as an inclined surface in which a blade sectional shape of the corresponding and adjacent region gradually changes. 4. The cross-flow fan according to claim 1, wherein the rib is formed in a region between an outer diameter of a blade outer peripheral end portion and an inner diameter of a blade inner peripheral end portion. 5. The cross-flow fan according to claim 1, wherein the rib has a thickness that is equal to or more than a minimum thickness of the blade and equal to or less than a maximum thickness of the blade. 6. The cross-flow fan according to claim 1, wherein the rib is formed on at least a blade suction surface in a blade surface, which is positioned on an opposite side to an impeller rotational direction side. 7. An air conditioner, comprising: a stabilizer for partitioning an inlet-side air duct and an outlet-side air duct inside a main body;a cross-flow fan arranged between the inlet-side air duct and the outlet-side air duct;a ventilation resistor arranged inside the main body; anda guide wall for guiding air discharged from the cross-flow fan to an air outlet of the main body,the cross-flow fan comprising the cross-flow fan of claim 1. 8. A cross-flow fan, comprising: an impeller; anda shaft supporting the impeller in a rotatable manner,the impeller comprising: a plurality of support plates; anda plurality of blades arranged at intervals in a circumferential direction between a corresponding pair of the plurality of support plates,each of the plurality of blades comprising a plurality of regions different in a blade cross section orthogonal to an impeller rotational axis,the plurality of regions being arranged in a direction of the impeller rotational axis in the blade,each of the plurality of blades further comprising a coupling portion for coupling the plurality of regions to each other,each of the plurality of blades comprising at least one rib formed on the coupling portion or a region adjacent to the coupling portion, wherein:the rib has a thickness formed into a tapered shape from a blade surface toward a leading end; andthe rib outer peripheral end portion and the rib inner peripheral end portion each have a leading end formed into an arc shape. 9. A cross-flow fan, comprising: an impeller; anda shaft supporting the impeller in a rotatable manner,the impeller comprising: a plurality of support plates; anda plurality of blades arranged at intervals in a circumferential direction between a corresponding pair of the plurality of support plates,each of the plurality of blades comprising a plurality of regions different in a blade cross section orthogonal to an impeller rotational axis,the plurality of regions being arranged in a direction of the impeller rotational axis in the blade,each of the plurality of blades further comprising a coupling portion for coupling the plurality of regions to each other,each of the plurality of blades comprising at least one rib formed on the coupling portion or a region adjacent to the coupling portion, wherein the rib has a rib height that is equal to or less than half a pitch of adjacent blades. 10. A cross-flow fan, comprising: an impeller; anda shaft supporting the impeller in a rotatable manner,the impeller comprising: a plurality of support plates; anda plurality of blades arranged at intervals in a circumferential direction between a corresponding pair of the plurality of support plates,each of the plurality of blades comprising a plurality of regions different in a blade cross section orthogonal to an impeller rotational axis,the plurality of regions being arranged in a direction of the impeller rotational axis in the blade,each of the plurality of blades further comprising a coupling portion for coupling the plurality of regions to each other,each of the plurality of blades comprising at least one rib formed on the coupling portion or a region adjacent to the coupling portion, wherein the rib is formed on at least a blade pressure surface on an impeller rotational direction side in the blade surface. 11. A cross-flow fan, comprising: an impeller; anda shaft supporting the impeller in a rotatable manner,the impeller comprising: a plurality of support plates; anda plurality of blades arranged at intervals in a circumferential direction between a corresponding pair of the plurality of support plates,each of the plurality of blades comprising a plurality of regions different in a blade cross section orthogonal to an impeller rotational axis,the plurality of regions being arranged in a direction of the impeller rotational axis in the blade,each of the plurality of blades further comprising a coupling portion for coupling the plurality of regions to each other,each of the plurality of blades comprising at least one rib formed on the coupling portion or a region adjacent to the coupling portion, wherein the rib is formed on, in a blade surface, both of a blade suction surface positioned on the opposite side to the impeller rotational direction side and a blade pressure surface positioned on the impeller rotational direction side. 12. The cross-flow fan according to claim 11, wherein the rib, which is formed on the blade suction surface, has a height that is larger than a height of the rib, which is formed on the blade pressure surface. 13. The cross-flow fan according to claim 11, wherein the rib, which is formed on the blade suction surface, and the rib, which is formed on the blade pressure surface, are formed at positions different from each other in the direction of the impeller rotational axis. 14. A cross-flow fan, comprising: an impeller; anda shaft supporting the impeller in a rotatable manner,the impeller comprising: a plurality of support plates; anda plurality of blades arranged at intervals in a circumferential direction between a corresponding pair of the plurality of support plates,each of the plurality of blades comprising a plurality of regions different in a blade cross section orthogonal to an impeller rotational axis,the plurality of regions being arranged in a direction of the impeller rotational axis in the blade,each of the plurality of blades further comprising a coupling portion for coupling the plurality of regions to each other,each of the plurality of blades comprising at least one rib formed on the coupling portion or a region adjacent to the coupling portion, wherein:the plurality of support plates and the plurality of blades are individually molded;the support plate has a side surface formed with groove portions for inserting therein the corresponding plurality of blades; andthe impeller is constructed in a mode in which the plurality of blades are inserted and fixed to the corresponding groove portions.
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이 특허에 인용된 특허 (3)
Ikeda, Takashi; Tadokoro, Takahide; Hamada, Shingo; Shirota, Mitsuhiro, Cross flow fan and air-conditioning apparatus including same.
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