US3659646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger construction
Assignee: General Electric Co
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Filing: 1970-06-15
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Granted: 1972-05-02
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Expires: 1990-06-15
Abstract
Abstract A heat exchanger for use in the flue gas exhaust system of a self-cleaning gas cooking oven in the form of a large squarecornered corrugated panel that is collapsed from the sides in the plane of the panel to create two intermeshed series of triangular shaped pipes where one series of alternate pipes carry hot flue gases while the opposite series of alternate pipes carry inlet air for transferring some of the heat of the flue gases to the ambient air. The front face of the heat exchanger that is turned toward the oven operates hot, while the back face of the heat exchanger operates relatively cool to reduce heat losses to the outside. Sealing means close both the top and bottom ends of the pipes. Inlet and outlet openings are formed in the front and back faces of the unit near the top and bottom.
Inventors
- 👤 Bohdan Hurko
- 👤 Raymond L Dills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:39
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0025; F24; F24C; F24C14/00; F24C14/02; F24C14/025; F24C15/00; F24C15/32; F28F; F28F2225/00; F28F2225/04; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/399; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
141 words
A heat exchanger for use in the flue gas exhaust system of a self-cleaning gas oven, said heat exchanger comprising a folded corrugated panel with two intermeshed series of triangular shaped pipes, one series of alternate pipes being adapted to carry ambient air and the other series of alternate pipes being adapted to carry hot flue gases, whereby one face of the heat exchanger is a relatively cool face and the opposite face is a hot face, sealing means at each end of the heat exchanger for closing the ends of the pipes and preventing intermixture between the air and gases of the two series of pipes, air inlet and outlet openings formed at opposite ends of the pipes at the cool face and flue gas inlet and outlet openings formed at opposite ends of the pipes at the hot face.
Claim 2
Dependent Claim
141 words
A heat exchanger for use in the flue gas exhaust system of a self-cleaning gas oven, said heat exchanger comprising a folded corrugated panel with two intermeshed series of triangular shaped pipes, one series of alternate pipes being adapted to carry ambient air and the other series of alternate pipes being adapted to carry hot flue gases, whereby one face of the heat exchanger is a relatively cool face and the opposite face is a hot face, sealing means at each end of the heat exchanger for closing the ends of the pipes and preventing intermixture between the air and gases of the two series of pipes, air inlet and outlet openings formed at opposite ends of the pipes at the cool face and flue gas inlet and outlet openings formed at opposite ends of the pipes at the hot face.
Claim 3
Dependent Claim
117 words
A heat exchanger comprising two intermeshed series of triangular shaped pipes formed by a square-cornered corrugated panel that is closed to form a front and a back face, one series of alternate pipes being adapted to carry hot gases and another series of alternate pipes adapted to carry ambient air, sealing means at each end of the heat exchanger for closing the ends of the pipes and preventing intermixture of the air and gases, the front face of the heat exchanger having gas inlet openings at one end and gas outlet openings adjacent the opposite end, the back of the heat exchanger having air inlet openings at one end and air outlet openings adjacent the opposite end.
Claim 4
Dependent Claim
117 words
A heat exchanger comprising two intermeshed series of triangular shaped pipes formed by a square-cornered corrugated panel that is closed to form a front and a back face, one series of alternate pipes being adapted to carry hot gases and another series of alternate pipes adapted to carry ambient air, sealing means at each end of the heat exchanger for closing the ends of the pipes and preventing intermixture of the air and gases, the front face of the heat exchanger having gas inlet openings at one end and gas outlet openings adjacent the opposite end, the back of the heat exchanger having air inlet openings at one end and air outlet openings adjacent the opposite end.
Claim 5
Dependent Claim
55 words
A heat exchanger as recited in claim 2 wherein the heat exchanger has a counterflow system with the gas inlet openings and the air inlet openings at opposite ends of the heat exchanger, while the gas outlet openings are adjacent the air inlet openings and the air outlet openings are adjacent the gas inlet openings.
Claim 6
Dependent Claim
77 words
A heat exchanger as recited in claim 3 wherein the heat exchanger is adapted to be vertically arranged with the gas inlet openings arranged adjacent the bottom to create a chimney effect with the hot gases rising through the heat exchanger, while the air inlet openings are arranged adjacent the top of the heat exchanger and the air is adapted to flow downwardly through the heat exchanger by a suction created downstream of the air outlet openings.
Claim 7
Dependent Claim
86 words
A heat exchanger having two intermeshed series of pipes formed by a square-cornered corrugated panel of thin walled sheet metal material that is collapsed from the sides to close the corrugations and form a substantially flat front and back face, clamping means for holding the corrugations closed, one series of alternate pipes being adapted to carry hot gases while the opposite series of alternate pipes is adapted to carry relatively cool gases for transferring some of the heat of the hot gases to the cool gases.
Claim 8
Dependent Claim
86 words
A heat exchanger having two intermeshed series of pipes formed by a square-cornered corrugated panel of thin walled sheet metal material that is collapsed from the sides to close the corrugations and form a substantially flat front and back face, clamping means for holding the corrugations closed, one series of alternate pipes being adapted to carry hot gases while the opposite series of alternate pipes is adapted to carry relatively cool gases for transferring some of the heat of the hot gases to the cool gases.
Claim 9
Dependent Claim
94 words
A heat exchanger as recited in claim 5 wherein sealing means close the opposite ends of the pipes, inlet openings for the hot gases through the bottom portion of the front face, outlet openings for the hot gases through the top portion of the front face, whereby the front face operates at a relatively high temperature, inlet openings for the cool gases through the top portion of the back face, outlet openings for the cool gases through the bottom portion of the back face whereby the back face operates at a relatively low temperature.
Claim 10
Dependent Claim
156 words
A counterflow heat exchanger for use in the flue gas exhaust system of a self-cleaning gas oven, said heat exchanger comprising a corrugated panel of thin sheet metal material that is collapsed transversely in the plane of the panel to close the corrugations and to form two intermeshed series of pipes where one series of alternate pipes is adapted to carry hot flue gases while the opposite series of alternate pipes is adapted to carry ambient air for transferring some of the heat from the flue gases to the ambient air, and clamping means for holding the corrugations closed, the front face of the heat exchanger being near the flue gas pipes and operating relatively hot while the back face of the heat exchanger is nearest the ambient air pipes and it operates relatively cool, the front face being disposed toward the source of hot flue gases while the back face is disposed toward the outside.
Claim 11
Dependent Claim
156 words
A counterflow heat exchanger for use in the flue gas exhaust system of a self-cleaning gas oven, said heat exchanger comprising a corrugated panel of thin sheet metal material that is collapsed transversely in the plane of the panel to close the corrugations and to form two intermeshed series of pipes where one series of alternate pipes is adapted to carry hot flue gases while the opposite series of alternate pipes is adapted to carry ambient air for transferring some of the heat from the flue gases to the ambient air, and clamping means for holding the corrugations closed, the front face of the heat exchanger being near the flue gas pipes and operating relatively hot while the back face of the heat exchanger is nearest the ambient air pipes and it operates relatively cool, the front face being disposed toward the source of hot flue gases while the back face is disposed toward the outside.
Claim 12
Dependent Claim
60 words
A counterflow heat exchanger as recited in claim 7 wherein the corrugated panel has right-cornered corrugations which when collapsed in the plane of the panel form two intermeshed series of triangular shaped pipes where the front series of pipes is adapted to carry the hot flue gases while the back series of pipes is adapted to carry the ambient air.
Claim 13
Dependent Claim
98 words
A counterflow heat exchanger as recited in claim 8 including sealing means at the opposite ends of the pipes for closing the pipes, gas inlet openings in the front face of the heat exchanger adjacent the bottom portion thereof, gas outlet openings in said front face adjacent the top portion thereof, air inlet openings in said back face adjacent the top portion thereof and air outlet openings in said back face adjacent the bottom portion thereof, and suction means adapted to be cOnnected to the air outlet openings for drawing the ambient air down through the heat exchanger.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |