Electric blower and electric vacuum cleaner utilizing the same

A blower, electric motor technology, applied in the direction of engine manufacturing, machine/engine, liquid fuel engine, etc., can solve the problems of air flow loss, the decline of the suction performance of the electric blower 119, etc.

Inactive Publication Date: 2012-01-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, within the same flow path 181, when there is a location with a relatively fast flow rate (for example, Fig. 11 at the root shown by the solid circle mark), the loss of air flow due to the flow velocity difference with other positions
As a result, there is a problem that the suction performance of the electric blower 119 decreases

Method used

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  • Electric blower and electric vacuum cleaner utilizing the same
  • Electric blower and electric vacuum cleaner utilizing the same
  • Electric blower and electric vacuum cleaner utilizing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] figure 1 It is a partial sectional view of the side of the electric blower in Embodiment 1. Such as figure 1 As shown, the electric blower 19 includes a motor portion 32 and a fan portion 31 .

[0030] The motor unit 32 has an armature 51 including a shaft 53 , an armature core 70 and a commutator 52 . The armature wire 22 is wound around the outer periphery of the armature core 70 . In addition, the motor unit 32 has the field system 9 in which the field coil 23 is wound around the outer periphery of the field core 72 . Bearings 4 are press-fitted into both ends of the shaft 53 of the armature 51 . One of the bearings 4 is supported by the counter-load side bracket 6 . Moreover, the motor part 32 has the brush holder 7 which contains the carbon brush 8, and is made of metal.

[0031]The fan unit 31 includes: an impeller 11 for sucking in air as a load and blowing out the sucked air; a housing 12 for covering the top of the impeller 11; a load-side bracket 5; an...

Embodiment approach 2

[0040] Figure 4 It is a sectional view of the structure of the impeller and air guide part vicinity of the electric blower in Embodiment 2 of this invention. This embodiment is different from Embodiment 1 in that the shape of the base portion 84, the shape of the flow path bottom surface 80c of the flow path 81, and the inner wall surface 80b of the guide vane 80 on the outer peripheral side are different from those of the first embodiment. The shape and the shape of the connecting portion where the channel bottom surface 80c is connected to the inner wall surface 80b of the guide vane 80 on the outer peripheral side are different. The other configurations are the same as in Embodiment 1, and the same components are assigned the same reference numerals and detailed descriptions thereof are omitted.

[0041] Such as Figure 4 As shown, the flow path bottom surface 80c of the air guide part 10 of this embodiment is a horizontal and flat surface. Here, the horizontal plane is...

Embodiment approach 3

[0044] Figure 5 It is a sectional view of the structure of the impeller and air guide part vicinity of the electric blower in Embodiment 3 of this invention. This embodiment is different from Embodiment 2 in that the shape of the connecting portion where the channel bottom surface 80c is connected to the inner wall surface 80b of the guide vane 80 on the outer peripheral side is different from that in the second embodiment. The other structures are the same as those in Embodiment 2, and the same reference numerals are assigned to the same components, and detailed description thereof will be omitted.

[0045] Such as Figure 5 As shown, in the air guide part 10 of the present embodiment, the connection portion between the flow path bottom surface 80c and the inner wall surface 80b of the guide vane 80 on the outer peripheral side has an arc shape with a radius R. The radius R is the same as the width of the flow path 81 .

[0046] Thus, the length B of the straight portion ...

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PUM

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Abstract

Air guide (10) that rectifies air blown out from an impeller includes a plurality of guide vanes (80) having a circular arc shape. In a cross-sectional shape of each one of flow passages (81) of air guide (10), length B of a straight-line portion in a shaft direction of an inner wall-surface formed by one of guide vanes (80) on an outer peripheral side is small compared with length A of a straight-line portion in a shaft direction of an inner wall-surface formed by one of guide vanes (80) on an inner peripheral side. This provides a uniformed flow velocity distribution inside flow passages (81), resulting in a reduced loss caused by differences in flow velocity.

Description

technical field [0001] The present invention relates to an electric blower and an electric vacuum cleaner using the same. Background technique [0002] As a conventional electric blower, for example, the electric blower disclosed in Patent Document 1 is known. Figure 8 It is a partial sectional view showing the electric blower described in Patent Document 1. Electric blower 119 includes a motor unit 132 and a fan unit 131 . [0003] The motor unit 132 has an armature 151 including a shaft 153 , an armature core 170 and a commutator 152 . The armature wire 122 is wound around the outer periphery of the armature core 170 . In addition, the motor part 132 has the excitation system 109 in which the excitation coil 123 is wound around the outer periphery of the excitation core 172 . Bearings 104 are press-fitted into both ends of the shaft 153 of the armature 151 . One of the bearings 104 is supported by the counter load side bracket 106 . In addition, the motor unit 132 ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/44
CPCF04D29/444F04D29/665F04D29/281F05D2250/52
Inventor 中村一繁森下和久秀熊哲平香山博之西村刚
Owner PANASONIC CORP
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