TH77286A - fan - Google Patents

Abstract

DC60 (08/06/58) The invention provides a fan capable of reducing noise and increasing efficiency by improving the fan blade structure used for, e.g., outdoor air-conditioning equipment. The invention provides a fan disc 1 having a plurality of blades 3 fixed to the outer surface of the rotating casing 2 at regular intervals in the circumferential direction, and the rear edge of the blade 3 having a projection shaped portion 30, the center of which in the radial direction is curved to extend to the suction side. By using such a structure, the air flow velocity can be uniformly maintained along the radial direction of the blades 3, and it is possible to reduce noise and increase efficiency. Edited Abstract of Invention 08/06/2015 The invention provides a fan capable of reducing noise and increasing efficiency by improving the fan blade structure used for, e.g., outdoor air-conditioning equipment. The invention provides a fan disc 1 having a plurality of blades 3 fixed to the outer surface of the rotating casing 2 at regular intervals in the circumferential direction. And the rear edge of the impeller 3 shall have a projecting shaped portion 30, the central portion of which in the radial direction is curved so as to extend to the suction side. By using such a structure, the air flow velocity can be made uniform along the radial direction of the impeller 3 and it is possible to reduce noise and improve efficiency. --------------------------------------------------------------------------------------- The present invention provides a fan that can reduce noise and improve efficiency by improving the fan blade structure for use in various applications, such as outdoor air-conditioning equipment. The present invention provides a fan wheel 1 having a plurality of blades 3 mounted on a circular periphery of a rotating casing 2 at equidistant intervals along the circular path, and the rear edge of the impeller 3 shall have a projecting shaped portion 30, the central portion of which in the circular direction is curved so as to extend to the suction side. By using such a structure, the ejection velocity of the air can be made uniform along the circumferential direction of the impeller 3 and it is possible to reduce noise and improve efficiency.

Claims (6)

Disclaimer (all) which will not appear on the advertisement page: EDIT 08/06/2015 1. Fan which includes The propeller blades, including multiple blades fixed to the outer surface of the casing, rotate periodically in the direction surrounding multiple blades, each with a rear edge. Where each propeller will include a protruding shaped part that is curved to expand to The suction side of the impeller at the center of the impeller in the radial direction from the part of the impeller near the rear edge to the rear edge. The protrusion includes the apex located on the suction side of the rear edge, and the protruding part is slanted in a radial direction from tip to side. The casing of the rear edge and from the tip to the tip of the rear edge 2. Fan, as stated in claim 1, where the apex of the contour protrudes. It is located at the center of the impeller in the radial direction. 3. Fan, as stated in claim 1, where the apex of the protruding part is 4. Fan, as stated in Clause 1, where the tip of the protruding part is located at the position of the impeller. Is located at the deflection to the end of the impeller 5. Fan, as stated in Clause 1, where the length of the protruding shape. In the radial direction, it ranges from 20% to 90% of the impeller length in the radial direction. 6. Fan, as stated in Clause 1, where the length of the protruding part. The radial direction is 40% to 80% of the impeller length in the radial direction. 7. Fan, as stated in claim 1, where the protruding part is deformed. The arc extends to the suction side of the impeller in a direction parallel to the axial direction determined by the impeller spindle, and the rear edge of the impeller is determined by a continuous arc in the radial direction. 9. Fan as indicated. In claim 1, where the impeller is made of material and the rear edge of the impeller is determined by the outermost edge of the material 1 0. The fan, which consists of The impeller plate, including multiple blades fixed to the outer surface of the casing, rotates periodically in the surrounding direction. Where for each propeller The slope of the tangent contact of the blade's arc The same distance from the rotating shaft increases at the casing side, and the extreme from the front edge to the rear edge, increasing at the center in the radial direction from the front edge to the adjacent. Of the back edge And is lowered from the vicinity of the rear edge to the rear edge, thereby creating a raised overhang in the central part that extends to the suction side of the impeller 1 1. Fan as stated in Clause 10. Where the apex of the raised overhang is at the point Center of the impeller in the radial direction 1 2. Fan as stated in Clause 10 where the apex of the raised overhang is Position deflected towards the impeller casing side 1 3. Fan as stated in Clause 10 where the apex of the raised overhang is Position deflected towards the far end of the impeller 1 4. Fan as specified in Clause 10, where the length of the protrusion is raised in the direction The radial direction is in the range 20% to 90% of the impeller length in the radial direction. 1 5. Fan, as stated in Clause 10, where the length of the protrusion raised in the direction. The radial is in the range 40% to 80% of the impeller length in the radial direction. 1 6. Fan, as stated in Clause 10, where the raised protrusion is gradually increased in the direction from the edge. Front to back edge 1 7. Fan as stated in Clause 10 where the raised protrusion extends to the suction side of the fan. Impeller in a direction parallel to the axial direction determined by the rotor axis and edge The back of the impeller is determined by a continuous arc in the radial direction. -------------------------------------------------- -------------- 1. a fan that is made up of an impeller wheel Where a number of blades are attached to the surface Around the outer circle of the rotary casing They are located equal intervals from each other in the direction around the circle with the characteristic that Rear edge of the impeller There will be a protruding shaped part where its center in the circular direction is curved to extend up to the suction side. 2. Fan as stated in Clause 1, which has the characteristics that The end of the part is Protruding shape It is at the center of the blade in the direction of the circle. 3. Fan as stated in Clause 1, which has the characteristics that The end of the part is Protruding shape Will be at the position that deviates from the casing of the impeller. 4. Fan as stated in Clause 1, which has the characteristics that The end of the part is Protruding shape Will be at the position that diverts from the tip of the blade. 5. Fan as specified in Clause 1 to Clause 4, any one Where there is a characteristic that The length of the protruding part In a circular direction it ranges from 20% to 90% of the impeller length in a circular direction. 6. Fan as specified in Clause 1 to Clause 4, any one Where there is a characteristic that The length of the protruding part In a circular direction it ranges from 40% to 80% of the blade length in a circular direction.