Patent FR1370084A successfully refreshed from Google Patents.
EP0243077A2
Expired / Lapsed
EP
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An automotive type electric heater
Assignee: Ford-Werke GmbH
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Filing: 1987-04-14
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Granted: —
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Expires: 2007-04-14
Abstract
Abstract A quick warm-up heat exchanger for use in the air duct (10) of a motor vehicle, consisting of pairs of spaced outer and inner heat conducting plates (12,14) separated by and joined to thin sheet metal corrugated and louvered finned secondary heat transfer members (16), and a central primary heat core sandwiched between the inner plates, the core including PTC (positive temperature coefficient) electrical heater elements (25) that are self-regulating in output temperature level and connected through the inner plates (14) to the vehicle electrical system so that when energized, upon turning on of the vehicle ignition system, a primary source of heat is quickly transferred to the inner plates (14) and therefrom to the large surface area of the louvered finned members (16) for secondary heat transfer to the duct air passing through the pockets (20) formed in the corrugated members and the slanted louvered openings (23) in the finned members (16).
Inventors
- 👤 Arvind Jiwajee Padgaonkar
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 15:33
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2215; B60H1/2225; F; F28; F28F; F28F3/00; F28F3/02; F28F3/025; F28F3/027; H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; B60H2001/2268; B60H2001/2293
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
230 words
An automotive type electric heater for use in the heater air duct of a vehicle comprising a heat exchanger adapted to be positioned crosswise in an air duct (10) for the flow of the air therethrough, the exchanger having spaced pairs of outer and inner substantially parallel heat conducting plates (12,14), thin corrugated metal sheet type finned members (16) secured at their outer and inner edges respectively to the outer and inner plates (12,14) of each pair providing a lengthy surface area for the secondary exchange of heat therefrom and defining contiguous cellular-like air pockets (20) between the plates for the flow of duct air through the pockets, each of the finned members (16) being louvered for the width of the pockets to provide slanted openings (23) for the passage of air therethrough from the cellular pockets (20), the air streams flowing through opposite sides of the cellular pocket (20) colliding with one another to provide turbulence and faster heat transfer from the metal finned members (16), and a primary heat core structure consisting of self limiting output temperture electric heater means (25) sandwiched between and connected to the inner plates (14) to quickly heat the same when electrically energized, the heat being transferred therefrom to the large surface area of the louvered finned members (16) for exchange with the duct air to warm the same passing through the pockets.
Claim 2
Dependent Claim
230 words
An automotive type electric heater for use in the heater air duct of a vehicle comprising a heat exchanger adapted to be positioned crosswise in an air duct (10) for the flow of the air therethrough, the exchanger having spaced pairs of outer and inner substantially parallel heat conducting plates (12,14), thin corrugated metal sheet type finned members (16) secured at their outer and inner edges respectively to the outer and inner plates (12,14) of each pair providing a lengthy surface area for the secondary exchange of heat therefrom and defining contiguous cellular-like air pockets (20) between the plates for the flow of duct air through the pockets, each of the finned members (16) being louvered for the width of the pockets to provide slanted openings (23) for the passage of air therethrough from the cellular pockets (20), the air streams flowing through opposite sides of the cellular pocket (20) colliding with one another to provide turbulence and faster heat transfer from the metal finned members (16), and a primary heat core structure consisting of self limiting output temperture electric heater means (25) sandwiched between and connected to the inner plates (14) to quickly heat the same when electrically energized, the heat being transferred therefrom to the large surface area of the louvered finned members (16) for exchange with the duct air to warm the same passing through the pockets.
Claim 3
Dependent Claim
15 words
A heater as claimed in Claim 1, including insulation means circumferentially enclosing the heat exchanger.
Claim 4
Dependent Claim
49 words
A heater as claimed in Claim 1 or 2, wherein the heater means includes a positive temperature coefficient self output temperature regulating element, the finned member louvers being slanted in different directions over the width of each finned member to collide air flow streams flowing through the louvered openings.
Claim 5
Dependent Claim
215 words
An electric heater for use in the air duct of a motor vehicle heater system comprising a heat exchanger adapted to be positioned crosswise in the duct (10) and having spaced outer and inner laterally extending heat conducting plates (12,14) a thin sheet metal laterally corrugated louvered member connecting the plates defining heat transfer fins (16) forming longitudinal cellular air pockets (20) for the passage of duct air therethrough, each of the finned members (16) being louvered over the extent of the pockets to provide slanted openings (23) for the passage of air therethrough from the cellular pockets (20), the air streams flowing through opposite sides of the cellular pockets (20) colliding with the one another to provide turbulence and faster hea ransfer from the finned members (16), and an electric PTC (positive temperture coefficient) self output temperature limiting heater element (25) secured to the inner plate (14) inwardly thereof, the operability of the heter element (25) quickly providing a primary source of heat to the inner plate (14) up to the output temperature limit of the PTC element (25) for transfer of heat therefrom to the large surface area of the finned members (16) for secondary heat exchange with the air passing thereagainst through the pockets (20) and through the slanted louver openings (23).
Claim 6
Dependent Claim
215 words
An electric heater for use in the air duct of a motor vehicle heater system comprising a heat exchanger adapted to be positioned crosswise in the duct (10) and having spaced outer and inner laterally extending heat conducting plates (12,14) a thin sheet metal laterally corrugated louvered member connecting the plates defining heat transfer fins (16) forming longitudinal cellular air pockets (20) for the passage of duct air therethrough, each of the finned members (16) being louvered over the extent of the pockets to provide slanted openings (23) for the passage of air therethrough from the cellular pockets (20), the air streams flowing through opposite sides of the cellular pockets (20) colliding with the one another to provide turbulence and faster hea ransfer from the finned members (16), and an electric PTC (positive temperture coefficient) self output temperature limiting heater element (25) secured to the inner plate (14) inwardly thereof, the operability of the heter element (25) quickly providing a primary source of heat to the inner plate (14) up to the output temperature limit of the PTC element (25) for transfer of heat therefrom to the large surface area of the finned members (16) for secondary heat exchange with the air passing thereagainst through the pockets (20) and through the slanted louver openings (23).
Claim 7
Dependent Claim
15 words
An electric heater as claimed in Claim 4, including insulation wrapped around the heat exchanger.
References Cited (Backward Citations)
No citation records indexed.
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