Automobile air heater utilizing PTC tablets adhesively fixed to tubular heat sinks
First Claim
1. An air heating device comprising an open electrically non-conductive frame containing two voltage rails, a plurality of extruded metal tubular members disposed in side-by-side parallel spaced relationship within the frame;
- said plurality of tubular members having a pair of spaced heat sinks having a plurality of spaced lamellae extending therebetween to form a plurality of air flow passages through each tubular member, and a plurality of PTC tablets each having two faces and being positioned in the space between the opposed outer surfaces of each heat sink pairs for adjacent tubular members, with one face being fixed to the outer surface of the heat sink of a tubular member by a rigid adhesive and the other face of the tablet being fixed to the outer surface of the heat sink of an adjacent tubular member by a flexible adhesive wherein one tubular member of each adjacent pair of tubular members is electrically connected to one voltage rail and the other tubular member to the other voltage rail.
1 Assignment
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Accused Products
Abstract
An electric heater for air supplied to the passenger compartment of an automobile has a plurality of extruded tubular metal members in side-by-side spaced parallel relationship within an open electrically insulative frame. Each tubular member has a pair of spaced heat sinks with a plurality of spaced lamenallae extending therebetween to form air flow passages. A plurality of PTC heating tablets are positioned in the space between the opposed outer surfaces of the heat sinks of adjacent tubular members, with one face of each PTC tablet fixed to one heat sink by a rigid electrically conductive adhesive and the other face thereof is fixed to the adjacent heat sink by a flexible electrically conductive adhesive. The heat sinks have integral platforms on which the PTC tablets are positioned with the edges of the tablets projecting beyond the edges of the respective platforms. The tubular members of each adjacent pair of tubular members are connected to respective ones of a pair of voltage rails in the frame through a fuse.
48 Citations
8 Claims
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1. An air heating device comprising an open electrically non-conductive frame containing two voltage rails, a plurality of extruded metal tubular members disposed in side-by-side parallel spaced relationship within the frame;
- said plurality of tubular members having a pair of spaced heat sinks having a plurality of spaced lamellae extending therebetween to form a plurality of air flow passages through each tubular member, and a plurality of PTC tablets each having two faces and being positioned in the space between the opposed outer surfaces of each heat sink pairs for adjacent tubular members, with one face being fixed to the outer surface of the heat sink of a tubular member by a rigid adhesive and the other face of the tablet being fixed to the outer surface of the heat sink of an adjacent tubular member by a flexible adhesive wherein one tubular member of each adjacent pair of tubular members is electrically connected to one voltage rail and the other tubular member to the other voltage rail.
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2. An air heating device comprising an open electrically non-conductive frame containing two voltage rails, said frame having a portion extending perpendicular to the heat sinks, two channels are hollowed out of said portion, each of the channels being provided with one of the voltage rails, a plurality of extruded metal tubular members disposed in side-by-side parallel spaced relationship within the frame;
- said plurality of tubular members having a pair of spaced heat sinks having a plurality of spaced lamellae extending therebetween to form a plurality of air flow passages through each tubular member, and a plurality of PTC tablets being positioned in the space between the opposed outer surfaces of said heat sink pairs for adjacent tubular members and being fixed to said opposed heat sinks by an electrically conductive adhesive means wherein one tubular member of each adjacent pair of tubular members is electrically connected to one voltage rail and the other tubular member to the other voltage rail.
- View Dependent Claims (3, 4, 5, 6, 7)
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8. An air heating device comprising an open electrically non-conductive frame containing two voltage rails, a plurality of extruded metal tubular members disposed in side-by-side parallel spaced relationship within the frame;
- said plurality of tubular members having a pair of spaced heat sinks having a plurality of spaced lamellae extending therebetween to form a plurality of air flow passages through each tubular member, and a plurality of PTC tablets being positioned in the space between the opposed outer surfaces of said heat sink pairs for adjacent tubular members, said heat sinks are provided with integral platforms for positioning and affixing said PTC tablets to said heat sinks, said platforms having circumferential edges such that said PTC tablets circumferential edges project beyond the circumferential edges of the platforms on all sides, wherein one tubular member of each adjacent pair of tubular members is electrically connected to one voltage rail and the other tubular member to the other voltage rail.
Specification