CENTRIFUGAL BLOWER
PROBLEM TO BE SOLVED: To reduce the generation of noise, improve the fan efficiency, and reduce the power consumption in a centrifugal blower used in ventilating blowing apparatuses. SOLUTION: In a centrifugal fan 1 in which the shroud-suction opening diameter Dsi of a shroud 3 is 0.60 to 0.85 compa...
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| creator | YAMAMOTO KIMINOBU |
| description | PROBLEM TO BE SOLVED: To reduce the generation of noise, improve the fan efficiency, and reduce the power consumption in a centrifugal blower used in ventilating blowing apparatuses. SOLUTION: In a centrifugal fan 1 in which the shroud-suction opening diameter Dsi of a shroud 3 is 0.60 to 0.85 compared to the fan-outside diameter D of the centrifugal fan 1, the shroud-outer peripheral part 7 positioned at discharge side 5 of the centrifugal fan 1 is inclined to the suction side 6 of the centrifugal fan 1, and the ventilation passage area of any circumferential cross- section Si is larger than the ventilation passage area of a blade-inlet circumferential cross-section S1 in the position in which a blade-inflow part 9 of a shroud- inside peripheral part 8 intersects the shroud 3, the discharge flow 15 of the centrifugal fan 1 is allowed to be directed in the direction of discharge ports 14 of a blower body 10, the discharge speed of the discharge flow from the shroud-outer peripheral part 7 of the centrifugal fan 1 is allowed to be reduced, and thus collisions of the discharge flow with the side wall 16 of the frame of the blower body 10 can be reduced, turbulence in a case body 17 can be reduced to reduce the generation of noise, and the fan efficiency can be improved. |
| format | Patent |
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SOLUTION: In a centrifugal fan 1 in which the shroud-suction opening diameter Dsi of a shroud 3 is 0.60 to 0.85 compared to the fan-outside diameter D of the centrifugal fan 1, the shroud-outer peripheral part 7 positioned at discharge side 5 of the centrifugal fan 1 is inclined to the suction side 6 of the centrifugal fan 1, and the ventilation passage area of any circumferential cross- section Si is larger than the ventilation passage area of a blade-inlet circumferential cross-section S1 in the position in which a blade-inflow part 9 of a shroud- inside peripheral part 8 intersects the shroud 3, the discharge flow 15 of the centrifugal fan 1 is allowed to be directed in the direction of discharge ports 14 of a blower body 10, the discharge speed of the discharge flow from the shroud-outer peripheral part 7 of the centrifugal fan 1 is allowed to be reduced, and thus collisions of the discharge flow with the side wall 16 of the frame of the blower body 10 can be reduced, turbulence in a case body 17 can be reduced to reduce the generation of noise, and the fan efficiency can be improved.</description><edition>7</edition><language>eng</language><subject>AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING ; BLASTING ; HEATING ; LIGHTING ; MECHANICAL ENGINEERING ; NON-POSITIVE DISPLACEMENT PUMPS ; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS ; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS ; RANGES ; VENTILATING ; WEAPONS</subject><creationdate>2000</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20000425&DB=EPODOC&CC=JP&NR=2000120582A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20000425&DB=EPODOC&CC=JP&NR=2000120582A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>YAMAMOTO KIMINOBU</creatorcontrib><title>CENTRIFUGAL BLOWER</title><description>PROBLEM TO BE SOLVED: To reduce the generation of noise, improve the fan efficiency, and reduce the power consumption in a centrifugal blower used in ventilating blowing apparatuses. SOLUTION: In a centrifugal fan 1 in which the shroud-suction opening diameter Dsi of a shroud 3 is 0.60 to 0.85 compared to the fan-outside diameter D of the centrifugal fan 1, the shroud-outer peripheral part 7 positioned at discharge side 5 of the centrifugal fan 1 is inclined to the suction side 6 of the centrifugal fan 1, and the ventilation passage area of any circumferential cross- section Si is larger than the ventilation passage area of a blade-inlet circumferential cross-section S1 in the position in which a blade-inflow part 9 of a shroud- inside peripheral part 8 intersects the shroud 3, the discharge flow 15 of the centrifugal fan 1 is allowed to be directed in the direction of discharge ports 14 of a blower body 10, the discharge speed of the discharge flow from the shroud-outer peripheral part 7 of the centrifugal fan 1 is allowed to be reduced, and thus collisions of the discharge flow with the side wall 16 of the frame of the blower body 10 can be reduced, turbulence in a case body 17 can be reduced to reduce the generation of noise, and the fan efficiency can be improved.</description><subject>AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING</subject><subject>BLASTING</subject><subject>HEATING</subject><subject>LIGHTING</subject><subject>MECHANICAL ENGINEERING</subject><subject>NON-POSITIVE DISPLACEMENT PUMPS</subject><subject>POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS</subject><subject>PUMPS FOR LIQUIDS OR ELASTIC FLUIDS</subject><subject>RANGES</subject><subject>VENTILATING</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2000</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBBydvULCfJ0C3V39FFw8vEPdw3iYWBNS8wpTuWF0twMSm6uIc4euqkF-fGpxQWJyal5qSXxXgFGBgYGhkYGphZGjsZEKQIAez8edA</recordid><startdate>20000425</startdate><enddate>20000425</enddate><creator>YAMAMOTO KIMINOBU</creator><scope>EVB</scope></search><sort><creationdate>20000425</creationdate><title>CENTRIFUGAL BLOWER</title><author>YAMAMOTO KIMINOBU</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2000120582A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2000</creationdate><topic>AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING</topic><topic>BLASTING</topic><topic>HEATING</topic><topic>LIGHTING</topic><topic>MECHANICAL ENGINEERING</topic><topic>NON-POSITIVE DISPLACEMENT PUMPS</topic><topic>POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS</topic><topic>PUMPS FOR LIQUIDS OR ELASTIC FLUIDS</topic><topic>RANGES</topic><topic>VENTILATING</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>YAMAMOTO KIMINOBU</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>YAMAMOTO KIMINOBU</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>CENTRIFUGAL BLOWER</title><date>2000-04-25</date><risdate>2000</risdate><abstract>PROBLEM TO BE SOLVED: To reduce the generation of noise, improve the fan efficiency, and reduce the power consumption in a centrifugal blower used in ventilating blowing apparatuses. SOLUTION: In a centrifugal fan 1 in which the shroud-suction opening diameter Dsi of a shroud 3 is 0.60 to 0.85 compared to the fan-outside diameter D of the centrifugal fan 1, the shroud-outer peripheral part 7 positioned at discharge side 5 of the centrifugal fan 1 is inclined to the suction side 6 of the centrifugal fan 1, and the ventilation passage area of any circumferential cross- section Si is larger than the ventilation passage area of a blade-inlet circumferential cross-section S1 in the position in which a blade-inflow part 9 of a shroud- inside peripheral part 8 intersects the shroud 3, the discharge flow 15 of the centrifugal fan 1 is allowed to be directed in the direction of discharge ports 14 of a blower body 10, the discharge speed of the discharge flow from the shroud-outer peripheral part 7 of the centrifugal fan 1 is allowed to be reduced, and thus collisions of the discharge flow with the side wall 16 of the frame of the blower body 10 can be reduced, turbulence in a case body 17 can be reduced to reduce the generation of noise, and the fan efficiency can be improved.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING BLASTING HEATING LIGHTING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS RANGES VENTILATING WEAPONS |
| title | CENTRIFUGAL BLOWER |
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