Dual fan cooling system
First Claim
1. A dual fan cooling system (38), comprising:
- a heat exchanger (40);
a primary fan (50) having a predetermined diameter (D) rotatably mounted on one side of the heat exchanger (40) for pushing air through the heat exchanger (40) in a preselected direction, the primary fan (50) having a peripheral portion (P) which produces an area (G) of greatest air flow through the heat exchanger (40) and a central portion (C) which produces an area (L) of lowest air flow through the heat exchanger (40); and
a secondary fan (82) having a predetermined diameter (d) smaller than the diameter (D) of the primary fan (50) and being rotatably mounted on the opposite side of the heat exchanger such that a substantially unobstructed flow path exists between said secondary fan and said heat exchanger, (40) at a location sufficient for pulling air through the heat exchanger (40) at the lowest air flow area (L) in the preselected direction and for substantially eliminating recirculation of air through the heat exchanger (40) in the opposite direction.
1 Assignment
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Accused Products
Abstract
Cooling systems are necessary to cool fluid circulated through an internal combustion engine so that engine temperatures can be controlled. The subject dual fan cooling system increases the air flow through a heat exchanger (40) by utilizing a primary fan and a secondary fan (50, 82). The primary fan (50) is located on one side of the heat exchanger (40) and pushes air through the heat exchanger (40) while the secondary fan (82) is located on the opposite side of the heat exchanger (40) and pulls air through the heat exchanger (40). The secondary fan (82) is rotatably mounted in a substantially concentric relation with the primary fan (50) to pull air through the heat exchanger (40) at the area (L) of lowest air flow. The secondary fan (82) also substantially eliminates the recirculation of air back through the heat exchanger (40). A shroud (86) encompasses the secondary fan (82) to substantially block air pushed through the heat exchanger (40) by the primary fan (50) from the secondary fan (82).
29 Citations
14 Claims
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1. A dual fan cooling system (38), comprising:
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a heat exchanger (40); a primary fan (50) having a predetermined diameter (D) rotatably mounted on one side of the heat exchanger (40) for pushing air through the heat exchanger (40) in a preselected direction, the primary fan (50) having a peripheral portion (P) which produces an area (G) of greatest air flow through the heat exchanger (40) and a central portion (C) which produces an area (L) of lowest air flow through the heat exchanger (40); and a secondary fan (82) having a predetermined diameter (d) smaller than the diameter (D) of the primary fan (50) and being rotatably mounted on the opposite side of the heat exchanger such that a substantially unobstructed flow path exists between said secondary fan and said heat exchanger, (40) at a location sufficient for pulling air through the heat exchanger (40) at the lowest air flow area (L) in the preselected direction and for substantially eliminating recirculation of air through the heat exchanger (40) in the opposite direction. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A dual fan cooling system (38) for an internal combustion engine having a heat exchanger (40), comprising:
a primary fan (50) having a predetermined diameter (D) rotatably mounted on one side of the heat exchanger (40) for pushing air through the heat exchanger (40) in a preselected direction, the primary fan (50) having a peripheral portion (P) which produces an area (G) of greatest air flow through the heat exchanger (40) and a central portion (C) which produces an area (L) of lowest air flow through the heat exchanger (40); and
a secondary fan (82) having a predetermined diameter (d) smaller than the diameter (D) of the primary fan (50) and being rotatably mounted on the opposite side of the heat exchanger such that a substantially unobstructed flow path exists between said secondary fan and said heat exchanger, (40) at a location sufficient for pulling air through the heat exchanger (40) at the lowest air flow area (L) in the preselected direction and for substantially eliminating recirculation of air through the heat exchanger (40) in the opposite direction.- View Dependent Claims (9, 10, 11, 12, 13, 14)
Specification