Electric blower for electric vacuum cleaner and electric vacuum cleaner equipped therewith
A technology for electric blowers and vacuum cleaners, applied to vacuum cleaners, parts of pumping devices for elastic fluids, mechanical equipment, etc., can solve problems such as deterioration of efficiency, sink marks on airtight surfaces, and large change rate of flow path area. Achieve the effect of reducing friction loss, loss reduction, and loss reduction
Active Publication Date: 2018-08-31
HITACHI GLOBAL LIFE SOLUTIONS INC
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- Application Information
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Problems solved by technology
As a result, the overlapping length of the flow paths between the vanes formed by the diffuser vanes is short
As a result, the area change rate of the flow path becomes large, and energy conversion from dynamic pressure to static pressure becomes difficult, which may adversely affect efficiency improvement.
In addition, due to the curved surface shape, the thickness changes, which may cause sink marks on the airtight surface, and the efficiency will deteriorate.
Method used
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Embodiment Construction
[0040] Hereinafter, details of electric vacuum cleaner 1 and electric blower 7 according to the embodiment of the present invention will be described with reference to the drawings. Furthermore, the electric vacuum cleaner 1 of the present invention may be a so-called cyclone type electric vacuum cleaner or a so-called paper bag type electric vacuum cleaner as long as it has the electric blower 7 . In addition, either a can type or a stick type may be used.
[0041] In addition, the motor 21 may be either a commutator motor using carbon brushes or a brushless motor not using brushes.
[0042]Hereinafter, as an example of embodiment, it demonstrates using the electric vacuum cleaner 1 which is a tank type cyclone electric vacuum cleaner.
[0043] "Structure of Electric Vacuum Cleaner"
[0044] Below, refer to figure 1 as well as figure 2 , the structure of the vacuum cleaner 1 according to the embodiment will be described.
[0045] figure 1 It is a perspective view which...
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The present invention provides an electric cleaner for an electric vacuum cleaner that smoothly converts energy from dynamic pressure to static pressure in a diffuser and efficiently flows the flow flowing out of the flow path between blades to the return flow path, thereby improving the efficiency of the electric blower. A blower and an electric vacuum cleaner equipped with it. The diameters of the diffuser and the annular member are approximately the same, and the hub surface of the diffuser and the diffuser-side surface of the annular member form a curved surface that faces toward the motor side as they go toward the outer circumference. The curvature is larger than the curvature of the curved surface provided on the hub surface of the diffuser, and the blade height of the diffuser blade is longer on the diffuser outer peripheral side than on the diffuser central side.
Description
technical field [0001] The present invention relates to an electric blower for an electric vacuum cleaner and an electric vacuum cleaner equipped with the same. Background technique [0002] Conventionally, an electric blower used in an electric vacuum cleaner has an impeller, a motor (electric motor) that fixes the impeller to a rotating shaft, a diffuser blade (stationary blade) provided on the outer periphery of the impeller, and a return blade provided on the back. The structure of the diffuser, the fan case housing the impeller and the diffuser. The diffuser is made of resin material. In addition, the fan cover is made of a metal material. [0003] In this structure, the suction port of the electric blower is provided in the fan cover, and external air is sucked in from the suction port by the rotation of the impeller. [0004] When the air flow from the impeller to the diffuser flows between the diffuser vanes, a part of it is converted from dynamic pressure to stat...
Claims
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IPC IPC(8): F04D29/44A47L9/00
Inventor 伊藤则和岩濑幸司佐藤繁则金贺靖伊藤贤宏坂上诚二本多武史渡边光
Owner HITACHI GLOBAL LIFE SOLUTIONS INC