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    • 98. 发明专利
    • AIR BLOWING DEVICE
    • JPH05332283A
    • 1993-12-14
    • JP14233792
    • 1992-06-03
    • MATSUSHITA ELECTRIC IND CO LTD
    • TOMOHIRO TERUHIKO
    • F04D17/08F04D29/28F04D29/30
    • PURPOSE:To suppress separation at low air flow amount while displaying the air flow characteristics of radial type, in a centrifugal air blowing device. CONSTITUTION:An air blowing device is provided with a main plate 12a at the center of which a boss 12b is provided, an impeller 12 which is constructed with multiple blades 14 and auxiliary plates 12c, a scroll casing which is constructed with a lower bottom plate 11b, an upper bottom plate 11a, and a side plate 11c, and a motor 13. The impeller 14 forms a hollow construction which is constructed with three surfaces of a positive pressure surface 14a, a negative pressure surface 14b, and an external surface 14c. In the negative surface 14b, multiple small holes 15 are provided and, in the main plate, an opening 12d is provided at a position opposed to the hollow section of the impeller 14. Also the lower bottom plate 11a of the scroll easing 11 is protruded outwards at a section opposed to the main plate 12a to form a disk like clearance 19 between the main plate 12a and the lower bottom plate 11a, and a pressure hole 18 provided near a delivery port 17 of the scroll casing 11 is connected to the disk like clearance by a connecting pipe 20. Thus it is suppressed that flow is separated from the negative surface when air flow amount is low.
    • 100. 发明专利
    • BLADE CURVED SURFACE CALCULATING AND PLOTTING DEVICE
    • JPH05101148A
    • 1993-04-23
    • JP25897491
    • 1991-10-07
    • MATSUSHITA ELECTRIC IND CO LTD
    • TOMOHIRO TERUHIKO
    • G06F17/50
    • PURPOSE:To shorten design and drawing time by providing an input device and an output device, and a display device which displays characters and figures while they are connected to a processor, and optionally supplying parameters determining a blade curved surface and designing a blade shape over a wide range. CONSTITUTION:This calculating and plotting device consists of the input device 2 for inputting the design parameters, the display device 3 which displays characters and figures, the output device 4 which outputs a drawing and a numerical table, and a processor 1 equipped with processing means for calculating the blade curved surface. Then the distribution of the entrance angle and exit angle of the blade is optionally set by regarding a nearly rectangular shape, formed by connecting four optional points by smooth curves, as a median shape. A blade curved line is constituted by connecting plural tertiary curves to design the blade in an optional curve shape. Individual blade curves are moved in a peripheral direction along an optional curve to freely alter the plane shape of an impeller. Then the final contour shape and three-dimensional coordinate values of the impeller are outputted to the display device and the output device in a short time.