[특허]Heat recovery device for use in return air duct of forced air furnace for recovering heat from the flue of such furnace

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특허 상세정보

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Heat recovery device for use in return air duct of forced air furnace for recovering heat from the flue of such furnace

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F28F-001/40
미국특허분류(USC)	165/179 ; 138/38 ; 165/DIG ; 2 ; 181/264
출원번호	US-0022972 (1979-03-23)
발명자 / 주소	Gary Fred J. (R.F.D. #1 Box 164 Glasco KS 67445)
인용정보	피인용 횟수 : 2 인용 특허 : 0

초록
▼

An especially compact, highly efficient heat recovery device for use in the cool air return duct of a heating system may be easily installed in existing flue pipes and transfers the ordinarily wasted heat in the exhaust gases flowing through the flue pipe to the cool return air thereby preheating the latter and increasing the efficiency of the heating system. The device includes a three stage heat transfer structure housed within a heat conductive tubular member which cooperate to transfer heat away from the gases into the cool return air by means of conduction, convection and radiation processes. A first stage deflects a portion of the gases toward and into heat exchanging contact with the sidewalls of the tubular member and directs the remaining portion into a gas pervious heat storage trap which comprises the second stage. The third stage includes a perforated, heat deflecting and radiating cone structure which cooperates with the first and second stages to produce temperature stratification within the tubular member to further increase heat transfer to the cool return air.

대표
청구항
▼

Apparatus for increasing the transfer of heat from a first, heated gas flowing through a heat conductive, tubular member to a second, cooler gas in contact with external surface areas of said member, wherein only a predetermined portion of said first gas would typically flow into direct heat transferring contact with interior surface areas of said member opposite said external surface areas thereof in the absence of the provision of means for suitably modifying the otherwise normal flow and heat transferring utilization of the passage of said first gas through said member, said apparatus including: gas flow dividing and deflecting means adapted to be disposed and supported within said member for proportionally dividing the flow of said first gas through said member into a first portion, greater than said predetermined portion, which is diverted and directed by said dividing and deflecting means outwardly toward and into heat transferring contact with said interior surface areas of said member for increased heating of said member and conduction of the increased heat thereby absorbed by said member to said external surface areas of said member in contact with said second gas for transfer to the latter, and a second, remaining portion, which is carried by and discharged from said dividing and deflecting means along a path spaced from said interior surface areas of said member and generally parallel to the direction of said normal flow of said first gas through said member, said dividing and deflecting means including sleeve means for defining an inner conduit open at its upstream extremity for receiving said flow of said first gas, said sleeve means including wall means spaced from said interior surface areas of said member and provided with a plurality of apertures therethrough for defining an outer conduit in partial lateral communication with said inner conduit and disposed between said wall means and said interior surface areas of said member for receiving said first portion of said first gas through said apertures and laterally confining the same, said outer conduit being open at its downstream extremity for discharging said first portion of said first gas along a path adjacent to said interior surface areas of said member and generally parallel to the direction of said normal flow of said first gas through said member, said dividing and deflecting means further including a plurality of deflecting vane means respectively operably associated with said apertures and extending into the interior of said sleeve means for diverting said first portion of said first gas from the flow of the latter entering said sleeve means and directing said first portion of said first gas outwardly through said apertures into said outer conduit and said heat transferring contact with said interior surface areas of said member, said dividing and deflecting means further including means for restricting without fully blocking gas flow operably associated with said sleeve means adjacent the downstream extremity of the latter for increasing the pressure of said first gas within said inner conduit to increase the flow of said first portion of said first gas through said apertures into said outer conduit and said heat transferring contact with said interior surface areas of said member, while also providing sufficient clearance to gas flow to present said path for said discharge of said second portion of said first gas from the downstream extremity of said inner conduit. In apparatus for transferring heat from flowing, heated, flue gas containing noxious products of combustion to cooler air to be heated and breathed, wherein said products of combustion are to be kept isolated from intermixing with said air: a heat conductive, tubular member having an external surface in contact with said air, an internal surface, an inlet extremity for receiving a flow of said flow gas, and an outlet extremity for discharging said flow of said flue gas away from said air; and a hollow, heat conductive, baffle structure mounted within said member and having a closed, upstream extremity facing said inlet extremity of said member, an open, downstream extremity facing said outlet extremity of said member and in communication with the latter, and a side wall having exterior and interior surfaces and provided with a plurality of openings therethrough, said internal surface of said member being in the path of and directly contacted by a portion of said flow of said flue gas and constituting means for absorbing heat from the latter and conducting same to said external surface of said member for transfer to said air, said exterior surface of said side wall being in the path of and directly contacted by a portion of said flow of said flue gas and constituting means for absorbing heat from the latter, said internal surface of said member being in adjacent proximity to said exterior surface of said side wall and constituting means for receiving and absorbing heat radiating from said side wall and conducting the same to said external surface of said member for transfer to said air, said exterior surface of said side wall being tapered outwardly toward said internal surface of said member as said downstream extremity of said structure is approached and constituting means for increasing the pressure of those portions of said flue gas in contact with said internal surface of said member and said exterior surface of said side wall and for deflecting an increased portion of said flow of said flue gas into direct contact with said internal surface of said member for increased absorption of heat by the latter and conduction of same to said external surface of said member for transfer to said air, said side wall of said structure adjacent said downstream extremity thereof being in direct engagement with said internal surface of said member and constituting means for conducting further heat from said structure to said member through the zone of said direct engagement therebetween for conduction of same to said external surface of said member for transfer to said air, said openings of said side wall permitting ultimate passage of said flow of said flue gas into the interior of said structure and into direct contact with said interior surface of said side wall and constituting means for causing the absorption of further heat by the latter for transfer to said member by said radiation and said conduction for conduction of same to said external surface of said member for transfer to said air.

이 특허를 인용한 특허 (2)

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특허 상세정보

Heat recovery device for use in return air duct of forced air furnace for recovering heat from the flue of such furnace

초록
▼

대표
청구항
▼

이 특허를 인용한 특허 (2)

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

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참여연구원의 다른 문헌(0)

처리중입니다.

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ScienceON Chatbot

연합인증

특허 상세정보

Heat recovery device for use in return air duct of forced air furnace for recovering heat from the flue of such furnace

초록 ▼

대표청구항 ▼

이 특허를 인용한 특허 (2)

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

참여연구원의 다른 문헌(0)

처리중입니다.

잠시만 기다려주세요.

초록
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대표
청구항
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