[특허]Heat transfer baffle arrangement for fuel-burning water heater

RHEEM MANUFACTURING COMPANY

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Heat transfer baffle arrangement for fuel-burning water heater

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F24H-001/20 F23M-009/10 F23M-009/00
출원번호	US-0596435 (2015-01-14)
등록번호	US-10036570 (2018-07-31)
발명자 / 주소	Zhang, Qian Yin, Jiang Flatness, Gary Gibbons, David
출원인 / 주소	RHEEM MANUFACTURING COMPANY
대리인 / 주소	King & Spalding LLP
인용정보	피인용 횟수 : 0 인용 특허 : 17

초록
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A baffle arrangement disposed within the exhaust flue of a fuel-burning water heater promotes heat transfer from exhausted combustion by-products to the water storage chamber. The baffle arrangement has an elongate planar base and plural exhaust-directing fins spaced along opposite sides of the base. Each fin is a planar body extending perpendicularly from the base at an acute upward angle from a longitudinal centerline to a respective side of the base. The fins deflect combustion by-products laterally outwardly within the flue to promote heat transfer. The fins are of selected configurations generally increasing in surface area upwardly along the planar base for selectively controlling pressure drop within the exhaust flue. Hanger tabs project outwardly from the upper end of the base to suspend the baffle arrangement within the flue. The planar base, hanger tabs and exhaust-directing fins are formed integrally from a unitary body of sheet metal.

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1. A fuel-burning water heater comprising: a housing defining a water storage chamber for containing a quantity of water to be heated and a combustion chamber located beneath the water storage chamber;an inlet extending through the housing into the storage chamber for delivering water into the storage chamber for heating;an outlet extending through the housing from the storage chamber for discharging heated water from the storage chamber;a fuel burner disposed in the combustion chamber for receiving and combusting a mixture of fuel and air for heating water contained in the water storage chamber;an exhaust flue extending from the combustion chamber vertically through the water storage chamber and outwardly from the housing for exhausting combustion by-products generated by combustion of the fuel-and-air mixture, anda baffle arrangement disposed within the exhaust flue to promote heat transfer from the combustion by-products via the exhaust flue to water contained in the water storage chamber for supplementing the heating of the water by the fuel burner,the baffle arrangement comprising: an elongate planar base having an upper end, a lower end, opposed lateral sides and a longitudinal centerline therebetween, anda plurality of fins that are exhaust-directing and spaced longitudinally along opposite sides of the centerline,each fin comprising a planar body extending perpendicularly from the elongate planar base and extending upwardly at an acute angle from adjacent the longitudinal centerline to adjacent a respective side,the plurality of fins being effective to deflect combustion by-products laterally outwardly within the exhaust flue to increase residence time therein and to promote contact with the exhaust flue for heat exchange,the plurality of fins being of selectively varying respective configurations and surface areas between the lower end and the upper end of the elongate planar base for achieving a selectively controlled pressure drop within the exhaust flue,wherein first selected fins of the plurality of fins are circular,wherein second selected fins of the plurality of fins are ovoid,wherein third selected fins of the plurality of fins have linear edges, andwherein each of the first selected fins has less surface area than each of the second selected fins and each of the third selected fins, and wherein each of the second selected fins has less surface area than each of the third selected fins. 2. A fuel-burning water heater according to claim 1, wherein the plurality of fins are increasing in respective surface area from the lower end to the upper end of the elongate planar base. 3. A fuel-burning water heater according to claim 1, wherein the elongate planar base and the plurality of fins are formed integrally from a unitary body of sheet metal having a uniform width prior to forming the plurality of fins. 4. A fuel-burning water heater according to claim 1, wherein the baffle arrangement further comprises a pair of hanger tabs projecting laterally outwardly from the opposed lateral sides at the upper end of the elongate planar base for engaging a top end of the exhaust flue to suspend the baffle arrangement within the flue. 5. A fuel-burning water heater according to claim 4, wherein the elongate planar base, the pair of hanger tabs and the plurality of fins are formed integrally from a unitary body of sheet metal having a uniform width prior to forming the pair of hanger tabs and the plurality of fins. 6. A fuel-burning water heater according to claim 5, wherein each of the pair of hanger tabs and the plurality of fins are formed by cuts and bends in the unitary body of sheet metal. 7. A fuel-burning water heater according to claim 3, wherein each of the plurality of fins are formed by cuts and bends in the unitary body of sheet metal. 8. A fuel-burning water heater according to claim 1, wherein the plurality of fins are oriented at an angle of thirty degrees (30°) to the longitudinal centerline. 9. A fuel-burning water heater according to claim 1, wherein the plurality of fins comprise a first sub-plurality of fins extending in a perpendicular direction from the elongate planar base, and a second sub-plurality of fins extending in an opposite perpendicular direction from the elongate planar base. 10. A fuel-burning water heater according to claim 9, wherein the plurality of fins comprise a third sub-plurality of fins along one side of the elongate planar base and a fourth sub-plurality of fins along the other side of the elongate planar base, each fin in the third sub plurality and an adjacent fin in the fourth sub plurality extending in the perpendicular direction from the elongate planar base. 11. A fuel-burning water heater according to claim 10, wherein the fins in the third and fourth sub-pluralities are arranged in alternation with one another longitudinally along the elongate planar base. 12. A fuel-burning water heater according to claim 1, wherein the plurality of fins comprise a fifth sub-plurality of fins that include a protuberance for contacting the exhaust flue for maintaining the baffle arrangement in a centered disposition within the exhaust flue. 13. A baffle arrangement for disposition within an exhaust flue to promote heat transfer to the exhaust flue from combustion by-products flowing within the exhaust flue, the baffle arrangement comprising: an elongate planar base having an upper end, a lower end, opposed lateral sides and a longitudinal centerline therebetween, anda plurality of fins that are exhaust-directing and spaced longitudinally along opposite sides of the centerline,each fin comprising a planar body extending perpendicularly from the elongate planar base and extending upwardly at an acute angle from adjacent the longitudinal centerline to adjacent a respective side,the plurality of fins being effective to deflect combustion by-products laterally outwardly within the exhaust flue to increase residence time therein and to promote contact with the exhaust flue for heat exchange,the plurality of fins being of selectively varying respective configurations and surface areas between the lower end and the upper end of the elongate planar base for achieving a selectively controlled pressure drop within the exhaust flue,wherein first selected fins of the plurality of fins are circular,wherein second selected fins of the plurality of fins are ovoid,wherein third selected fins of the plurality of fins have linear edges, andwherein each of the first selected fins has less surface area than each of the second selected fins and each of the third selected fins, and wherein each of the second selected fins has less surface area than each of the third selected fins. 14. A baffle arrangement according to claim 13, wherein the plurality of fins are increasing in respective surface area from the lower end to the upper end of the elongate planar base. 15. A baffle arrangement according to claim 13, wherein the elongate planar base and the plurality of fins are formed integrally from a unitary body of sheet metal having a uniform width prior to forming the plurality of fins. 16. A baffle arrangement according to claim 13, wherein the baffle arrangement further comprises a pair of hanger tabs projecting laterally outwardly from the opposed lateral sides at the upper end of the elongate planar base for engaging a top end of the exhaust flue to suspend the baffle arrangement within the flue. 17. A baffle arrangement according to claim 16, wherein the elongate planar base, the pair of hanger tabs and the plurality of fins are formed integrally from a unitary body of sheet metal having a uniform width prior to forming the pair of hanger tabs and the plurality of fins. 18. A baffle arrangement according to claim 17, wherein each of the pair of hanger tabs and the plurality of fins are formed by cuts and bends in the unitary body of sheet metal. 19. A baffle arrangement according to claim 15, wherein each of the plurality of fins are formed by cuts and bends in the unitary body of sheet metal. 20. A baffle arrangement according to claim 13, wherein the plurality of fins are oriented at an angle of thirty degrees (30°) to the longitudinal centerline. 21. A baffle arrangement according to claim 13, wherein the plurality of fins comprise a first sub-plurality of fins extending in a perpendicular direction from the elongate planar base, and a second sub-plurality of fins extending in an opposite perpendicular direction from the elongate planar base. 22. A baffle arrangement according to claim 21, wherein the plurality of fins comprise a third sub plurality of fins along one side of the elongate planar base and a fourth sub-plurality of fins along the other side of the elongate planar base, each fin in the third sub-plurality and an adjacent fin in the fourth sub plurality extending in the perpendicular direction from the elongate planar base. 23. A baffle arrangement according to claim 22, wherein the fins in the third and fourth sub-pluralities are arranged in alternation with one another longitudinally along the elongate planar base. 24. A baffle arrangement according to claim 13, wherein the plurality of fins comprise a fifth sub-plurality of fins that include a protuberance for contacting the exhaust flue for maintaining the baffle arrangement in a centered disposition within the exhaust flue.

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Heat transfer baffle arrangement for fuel-burning water heater

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Heat transfer baffle arrangement for fuel-burning water heater

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