JPS6432099A - Centrifugal blower - Google Patents

Centrifugal blower

Info

Publication number
JPS6432099A
JPS6432099A JP18769687A JP18769687A JPS6432099A JP S6432099 A JPS6432099 A JP S6432099A JP 18769687 A JP18769687 A JP 18769687A JP 18769687 A JP18769687 A JP 18769687A JP S6432099 A JPS6432099 A JP S6432099A
Authority
JP
Japan
Prior art keywords
bottleneck part
sectional area
control valve
bottleneck
flow sectional
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
JP18769687A
Other languages
Japanese (ja)
Inventor
Sadao Hiraga
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.)
Maruyama Manufacturing Co Ltd
Original Assignee
Maruyama Manufacturing Co 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 Maruyama Manufacturing Co Ltd filed Critical Maruyama Manufacturing Co Ltd
Priority to JP18769687A priority Critical patent/JPS6432099A/en
Publication of JPS6432099A publication Critical patent/JPS6432099A/en
Pending legal-status Critical Current

Links

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  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE:To reduce the extent of noise by selecting a flow sectional area of the bottleneck part of a blower, whose upstream end of a scroll chamber comes to the bottleneck part and is interconnected to the downstream side, with a control valve. CONSTITUTION:In a bottleneck part 19 of a centrifugal blower 12, there is provided with a columnar control valve 34. When high pressure is produced, the circular side of this columnar control valve 34 is directed to the bottleneck part 19, throttling a flow sectional area of the bottleneck part 19. If so, an upstream end of a scroll chamber 18 is amply cut off to the downstream end. When the high pressure is not required, a notch side of the valve 34 is directed to the bottleneck part 19, increasing the flow sectional area. Consequently, a pressure differential at both ends of the bottleneck part is reducible so that low noise designing is thus promotable.
JP18769687A 1987-07-29 1987-07-29 Centrifugal blower Pending JPS6432099A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18769687A JPS6432099A (en) 1987-07-29 1987-07-29 Centrifugal blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18769687A JPS6432099A (en) 1987-07-29 1987-07-29 Centrifugal blower

Publications (1)

Publication Number Publication Date
JPS6432099A true JPS6432099A (en) 1989-02-02

Family

ID=16210551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18769687A Pending JPS6432099A (en) 1987-07-29 1987-07-29 Centrifugal blower

Country Status (1)

Country Link
JP (1) JPS6432099A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4936241U (en) * 1972-07-12 1974-03-30
JPS5040006U (en) * 1973-07-05 1975-04-24

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4936241U (en) * 1972-07-12 1974-03-30
JPS5040006U (en) * 1973-07-05 1975-04-24

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