JPS54105306A - Electric fan - Google Patents
Electric fanInfo
- Publication number
- JPS54105306A JPS54105306A JP1145978A JP1145978A JPS54105306A JP S54105306 A JPS54105306 A JP S54105306A JP 1145978 A JP1145978 A JP 1145978A JP 1145978 A JP1145978 A JP 1145978A JP S54105306 A JPS54105306 A JP S54105306A
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- partitioning plate
- inlet
- cutting
- diffuser vane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To eliminate the peak sound three times as high as the fundamental frequency of an impeller by cutting diagonally the inlet of a diffuser vane and setting the length l of the cutting at l = (0.4W0.75)πd/3z (where d represents the outer diameter of the impeller and z represents the number of vanes).
CONSTITUTION: Diffuser vane 3a is placed in front of partitioning plate 3 and in the external radial direction of impeller 2. Return guide vane 3b is projected in the back of partitioning plate 3, and a concentric gap is formed between partitioning plate 3 and fan casing 1. To send cooling air from the outside of impeller 2 to electric motor 5, a fluid passage is formed. The radius of the inlet of diffuser vane 3a on the side of partitioning plate 3 is made small and that on the side of fan casing 1 is made large. The inlet is cut diagonally, and the length l of the cutting is set l = (0.4W0.75)πd/3z. By this, the peak sound three times as high as the fundamental frequency of impeller 2 is eliminated.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1145978A JPS54105306A (en) | 1978-02-06 | 1978-02-06 | Electric fan |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1145978A JPS54105306A (en) | 1978-02-06 | 1978-02-06 | Electric fan |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54105306A true JPS54105306A (en) | 1979-08-18 |
Family
ID=11778672
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1145978A Pending JPS54105306A (en) | 1978-02-06 | 1978-02-06 | Electric fan |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54105306A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4679990A (en) * | 1984-12-28 | 1987-07-14 | Matsushita Electric Industrial Co., Ltd. | Electric blower |
JPH0378600A (en) * | 1989-08-17 | 1991-04-03 | Sanyo Electric Co Ltd | Electric-powered blower |
-
1978
- 1978-02-06 JP JP1145978A patent/JPS54105306A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4679990A (en) * | 1984-12-28 | 1987-07-14 | Matsushita Electric Industrial Co., Ltd. | Electric blower |
JPH0378600A (en) * | 1989-08-17 | 1991-04-03 | Sanyo Electric Co Ltd | Electric-powered blower |
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