Patent US3695250A successfully refreshed from Google Patents.
US3695250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary regenerative space heater
Assignee: Mestek Inc
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Filing: 1970-12-03
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Granted: 1972-10-03
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Expires: 1990-12-03
Abstract
Abstract A rotary regenerative type gas-fired space heater in which a line-type raw gas burner is mounted atop and fires downwardly within a combustion chamber, the bottom of which is in direct communication with one side of a low thermal mass regenerative heat exchange wheel. The burner, chamber and wheel are mounted within a housing partitioned to provide two vertically disposed, parallel air passages, the burner and chamber being in one passage and the horizontally disposed wheel extending into both and passing through the partition. High velocity air for both combustion and dilution is induced by an exhaust fan to enter openings in the housing and to flow upwardly through a space between the housing walls and the combustion chamber before mixing with the fuel and downwardly flowing combustion products which are then drawn by the fan through the heat exchange wheel and exhausted. Another fan located below the wheel in the other passage introduces air to be heated by drawing it in through bottom openings in the housing, projecting it upwardly through the wheel, and expelling it through an outlet grille at the top of the housing or into connected heated-air ducting.
Inventors
- 👤 Marvin K Rohrs
- 👤 Robert J Neary
- 👤 Robert B Rosenberg
- 👤 Alan Kardas
- 👤 William R Staats
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:05
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065; F28; F28D; F28D19/00; F28D19/04
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
195 words
A space heater comprising a housing, a rotary heat exchange wheel mounted for rotation within said housing, partition means within said housing intersecting said wheel and dividing the housing into two passages for conveying gaseous fluid through separate regions of said wheel in an axial direction, inlet and outlet means in said housing communicating with opposite ends of one of said passages, means for causing air to flow through said one passage and wheel from said inlet means to said outlet means, a combustion chamber disposed within the other passage on one side of said wheel, said chamber having an opening in communication with said wheel and said other passage having an exhaust opening on the other side of said wheel, a fuel burner in communication with said chamber at a spaced location spaced from said wheel, means for supplying fuel to said burner, means for causing combustion products from said burner to flow through said wheel and to the exterior of said housing by way of said exhaust opening, and seal means between said partition means and said wheel for substantially preventing leakage of heated air from said one passage into said other passage.
Claim 2
Dependent Claim
195 words
A space heater comprising a housing, a rotary heat exchange wheel mounted for rotation within said housing, partition means within said housing intersecting said wheel and dividing the housing into two passages for conveying gaseous fluid through separate regions of said wheel in an axial direction, inlet and outlet means in said housing communicating with opposite ends of one of said passages, means for causing air to flow through said one passage and wheel from said inlet means to said outlet means, a combustion chamber disposed within the other passage on one side of said wheel, said chamber having an opening in communication with said wheel and said other passage having an exhaust opening on the other side of said wheel, a fuel burner in communication with said chamber at a spaced location spaced from said wheel, means for supplying fuel to said burner, means for causing combustion products from said burner to flow through said wheel and to the exterior of said housing by way of said exhaust opening, and seal means between said partition means and said wheel for substantially preventing leakage of heated air from said one passage into said other passage.
Claim 3
Dependent Claim
45 words
A space heater according to claim 1, wherein said means for causing the flow of combustion products through said wheel includes means permitting the flow of dilution air past said burner and into said combustion chamber to mix with the combustion products from said burner.
Claim 4
Dependent Claim
48 words
A space heater according to claim 2, wherein said burner is gas fired, and said means permitting the flow of dilution air is constructed to permit such flow in sufficient quantity to reduce the temperature of the combustion products as they enter the wheel to below 1500* F.
Claim 5
Dependent Claim
39 words
A space heater according to claim 3, wherein said wheEl has a thermal capacity and is rotatable at a speed sufficient to reduce the temperature of the flue products as they leave the wheel to below about 275* F.
Claim 6
Dependent Claim
91 words
A space heater according to claim 1, wherein said combustion chamber has walls spaced inwardly from the exterior walls of said housing, and wherein said means for causing the flow of said combustion products comprises means for admitting dilution air to the space between said chamber walls and said housing near the plane of said wheel, said space providing a flow passage for said dilution air along the outside of said chamber and leading to said burner whereby said walls of said housing and chamber are cooled by said dilution air.
Claim 7
Dependent Claim
105 words
A space heater according to claim 1, wherein said wheel comprises a corrugated media having axially aligned corrugations providing low resistance to the passage of air through said media, and wherein said means for causing air to flow through said one passage comprises a fan positioned in said one passage so as to direct its output substantially entirely at said wheel within the confines of the periphery of the wheel whereby most of the air moved by the fan passes through said media corrugations, the periphery of said wheel within said one passage being spaced from the surrounding walls of the passage without substantial obstruction.
Claim 8
Dependent Claim
59 words
A space heater according to claim 6, wherein said one passage has a rectangular cross-section in the plane of said wheel, and said fan has its outlet inclined with respect to the axis of said wheel to discharge air towards said wheel and generally away from the space between said wheel periphery and said surrounding walls of the passage.
Claim 9
Dependent Claim
33 words
A space heater according to claim 2, wherein said burner is of the high turndown, high velocity airstream line type, and said combustion chamber is provided with a restricted opening around said burner.
Claim 10
Dependent Claim
79 words
A space heater according to claim 1, wherein said wheel is mounted with its axis vertical, said partition means extends in the vertical direction, said combustion chamber is positioned above said wheel, said means for causing air to flow through said one passage comprises a fan positioned below said wheel, said outlet means are located adjacent the top of said housing, and said inlet means are located in the side walls of said housing substantially adjacent the bottom thereof.
Claim 11
Dependent Claim
46 words
A space heater according to claim 9, wherein said other passage provides a compartment below said wheel, and said means for causing combustion products from said burner to flow through said wheel comprises an exhaust fan mounted in said compartment in communication with said exhaust opening.
Claim 12
Dependent Claim
23 words
A space heater according to claim 10, wherein said exhaust fan and the first said fan are both driven by a common motor.
Claim 13
Dependent Claim
26 words
A space heater according to claim 9, wherein a motor for driving said wheel is mounted in said one passage between said fan and said wheel.
Claim 14
Dependent Claim
51 words
A space heater according to claim 1, wherein said wheel comprises a corrugated metal foil media having flush faces and a low resistance to the axial passage of air therethrough, and said seal means comprises lengths of resilient sheet material supported by said partition means in sliding contact with said wheel.
Claim 15
Dependent Claim
33 words
A space heater according to claim 13, wherein said lengths of sheet material consist of metal foil having thickness which is substantially the same as that of the foil in said foil media.
Claim 16
Dependent Claim
292 words
A space heater according to claim 1, wherein said combustion chamber has walls spaced inwardly from the exterior walls of said housing; said burner is of the raw gas type; said means for causing the flow of said combustion products includes means for admitting dilution air to the space between said chamber walls and said housing walls near the plane of said wheel, said space providing a flow passage for said dilution air along the outside of said chamber and leading to said burner whereby said walls of said housing and chamber are cooled by Said dilution air; said wheel is mounted with its axis vertical; said partition means extends in the vertical direction; said combustion chamber is positioned above said wheel; said means for causing air to flow through said one passage comprises a fan positioned in said one passage below said wheel; said outlet means are located substantially adjacent the top of said housing; said inlet means are located in the side walls of said housing substantially adjacent the bottom thereof; said wheel comprises a corrugated metal foil media having flush faces and a low resistance to the axial passage of air therethrough, said fan having its outlet inclined with respect to the axis of said wheel to direct substantially its entire output of air towards the wheel substantially within the confines of the periphery of the wheel; said other passage provides a compartment below said wheel; said means for causing combustion products from said burner to flow through said wheel comprises an exhaust fan mounted in said compartment in communication with said exhaust opening; and said seal means comprises lengths of resilient sheet material supported by said partition means in sliding contact with said flush surfaces of said wheel.
Claim 17
Dependent Claim
32 words
A space heater according to claim 1, further comprising means for purging products of combustion from portions of said wheel as said portions pass from said other passage to said one passage.
Claim 18
Dependent Claim
158 words
A space heater comprising a housing, a rotary heat exchange wheel mounted for rotation within said housing, partition means within said housing intersecting said wheel and dividing the housing into two passages for conveying gaseous fluid through separate regions of said wheel, inlet and outlet means in said housing communicating with opposite ends of one of said passages, a combustion chamber opening to the other passage on one side of said wheel, said other passage having an exhaust opening on the other side of said wheel, a fuel burner in communication with said chamber at a location spaced from said wheel, means for supplying fuel to said burner, and means for causing air to flow through said one passage and wheel from said inlet means to said outlet means of said one passage and for causing combustion products from said burner to flow through said other passage and said wheel to said exhaust opening of said other passage.
Claim 19
Dependent Claim
158 words
A space heater comprising a housing, a rotary heat exchange wheel mounted for rotation within said housing, partition means within said housing intersecting said wheel and dividing the housing into two passages for conveying gaseous fluid through separate regions of said wheel, inlet and outlet means in said housing communicating with opposite ends of one of said passages, a combustion chamber opening to the other passage on one side of said wheel, said other passage having an exhaust opening on the other side of said wheel, a fuel burner in communication with said chamber at a location spaced from said wheel, means for supplying fuel to said burner, and means for causing air to flow through said one passage and wheel from said inlet means to said outlet means of said one passage and for causing combustion products from said burner to flow through said other passage and said wheel to said exhaust opening of said other passage.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |