JPS54105306A - Electric fan - Google Patents

Electric fan

Info

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
Application number
JP1145978A
Other languages
Japanese (ja)
Inventor
Koji Iwase
Kunihiro Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1145978A priority Critical patent/JPS54105306A/en
Publication of JPS54105306A publication Critical patent/JPS54105306A/en
Pending legal-status Critical Current

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
JP1145978A 1978-02-06 1978-02-06 Electric fan Pending JPS54105306A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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