INNER SURFACE GROOVED HEAT TRANSFER TUBE
PROBLEM TO BE SOLVED: To provide an internal surface grooved heat transfer tube with improved heat exchange efficiency by preventing to the utmost a boundary layer from being produced in the vicinity of a bottom surface of a groove, and further preventing heat insulation action by the boundary layer...
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| creator | FUKATAMI TAKAO KOUCHI TETSUYA KIKUCHI SHIN |
| description | PROBLEM TO BE SOLVED: To provide an internal surface grooved heat transfer tube with improved heat exchange efficiency by preventing to the utmost a boundary layer from being produced in the vicinity of a bottom surface of a groove, and further preventing heat insulation action by the boundary layer. SOLUTION: Many spiral long fins 2 are formed in parallel on an internal peripheral surface of a metal tube 1, each fin taking an axis of the metal tube 1 as a spiral axis. A first groove 6 is formed between these fins 2, and a short fin 4 is formed at least in a part of the aforementioned groove 6 while extending in parallel with the longer fins 2. There is further formed a second groove 8 having a narrower opening width than the first groove 6 between the longer fin 2 and the shorter fin 4. |
| format | Patent |
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SOLUTION: Many spiral long fins 2 are formed in parallel on an internal peripheral surface of a metal tube 1, each fin taking an axis of the metal tube 1 as a spiral axis. A first groove 6 is formed between these fins 2, and a short fin 4 is formed at least in a part of the aforementioned groove 6 while extending in parallel with the longer fins 2. There is further formed a second groove 8 having a narrower opening width than the first groove 6 between the longer fin 2 and the shorter fin 4.</description><edition>7</edition><language>eng</language><subject>BLASTING ; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION ; HEAT EXCHANGE IN GENERAL ; HEATING ; LIGHTING ; MECHANICAL ENGINEERING ; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL ; PERFORMING OPERATIONS ; PUNCHING METAL ; TRANSPORTING ; WEAPONS ; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL</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=20000728&DB=EPODOC&CC=JP&NR=2000205781A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20000728&DB=EPODOC&CC=JP&NR=2000205781A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>FUKATAMI TAKAO</creatorcontrib><creatorcontrib>KOUCHI TETSUYA</creatorcontrib><creatorcontrib>KIKUCHI SHIN</creatorcontrib><title>INNER SURFACE GROOVED HEAT TRANSFER TUBE</title><description>PROBLEM TO BE SOLVED: To provide an internal surface grooved heat transfer tube with improved heat exchange efficiency by preventing to the utmost a boundary layer from being produced in the vicinity of a bottom surface of a groove, and further preventing heat insulation action by the boundary layer. SOLUTION: Many spiral long fins 2 are formed in parallel on an internal peripheral surface of a metal tube 1, each fin taking an axis of the metal tube 1 as a spiral axis. A first groove 6 is formed between these fins 2, and a short fin 4 is formed at least in a part of the aforementioned groove 6 while extending in parallel with the longer fins 2. 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SOLUTION: Many spiral long fins 2 are formed in parallel on an internal peripheral surface of a metal tube 1, each fin taking an axis of the metal tube 1 as a spiral axis. A first groove 6 is formed between these fins 2, and a short fin 4 is formed at least in a part of the aforementioned groove 6 while extending in parallel with the longer fins 2. There is further formed a second groove 8 having a narrower opening width than the first groove 6 between the longer fin 2 and the shorter fin 4.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| language | eng |
| recordid | cdi_epo_espacenet_JP2000205781A |
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| subjects | BLASTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION HEAT EXCHANGE IN GENERAL HEATING LIGHTING MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING WEAPONS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL |
| title | INNER SURFACE GROOVED HEAT TRANSFER TUBE |
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