Abstract: A self-powered thermal fan for circulating air for use in cooperation with a heat source, such as a wood stove, and which relies on a thermoelectric generator to provide electrical current to power a motor. The motor is used to move fan blades which create a warm air flow away for the heat source, and a cooler air flow towards the fan assembly. In the present invention, the fan assembly includes at least two thermoelectric generator modules that are separate by a gap which allows for increase module surface area, without creating a risk of module damage caused by heat expansion. The improved design also preferably includes the use of angled module mounting lands, which aid in increasing heat gradient across the module. Additionally, the present device provides the ability to have larger heat exchange surfaces that can provide increased cooling to the opposite surfaces of the thermoelectric generator module. Improved output and efficiencies of the self-powered thermal fan assembly are achieved.

Abstract: A self-powered fan for circulating air for use in cooperation with a heat source, such as a wood stove, and having a first heat transfer member thermally and physically connected with the heat source. The fan blades operably create a first or warm air flow and a second or cooler air flow. The fan has a second heat transfer member with a thermocouple module structure located between the two heat transfer members. The first heat transfer member is of suitable material, size, mass and shape as to provide a suitable temperature gradient between the thermocouple structure and the heat source to operably allow of such sufficient heat transfer from the first heat transfer member to the thermocouple to generate sufficient power to effect rotation of the blades, but not to cause thermal damage to the thermocouple structure.

Abstract: A self-powered fan for circulating air for use in cooperation with a heat source, such as a wood stove, and having a first heat transfer member thermally and physically connected with the heat source. The fan blades operably create a first or warm air flow and a second or cooler air flow. The fan has a second heat transfer member with a thermocouple module structure located between the two heat transfer members. The first heat transfer member is of suitable material, size, mass and shape as to provide a suitable temperature gradient between the thermocouple structure and the heat source to operably allow of such sufficient heat transfer from the first heat transfer member to the thermocouple to generate sufficient power to effect rotation of the blades, but not to cause thermal damage to the thermocouple structure.

Abstract: A self-powered fan for circulating air for use in cooperation with a heat source, said fan comprising a heat transfer member having a heat transfer surface operably cooperable with said heat source, electric motor, fan blades, thermocouple means cooperable with said electric motor and said heat transfer member, the improvement comprising said heat transfer member being of suitable size, mass and shape as to provide a suitable temperature gradient between said thermocouple means and said heat source to operably allow of sufficient heat transfer from said heat transfer member to said thermocouple means to generate sufficient power to effect rotation of said blades but not to cause thermal damage to said thermocouple means.