Inclined-type polyhedral-structure thermoelectric arm

Abstract

The invention discloses an inclined-type polyhedral-structure thermoelectric arm. The three-dimensional structure of the thermoelectric arm is an octahedral structure; the octahedral structure of the thermoelectric arm comprises a side surface A, a side surface B, a bottom surface A, a bottom surface B, a cut surface A, a cut surface B, an inclined surface A and an inclined surface B; the side surface A is parallel to and equal to the side surface B; the bottom surface A is parallel to and equal to the bottom surface B; the cut surface A is parallel to and equal to the cut surface B; the inclined surface A is parallel to and equal to the inclined surface B; corner regions of two ends of each of long diagonals of a common inclined parallel hexahedron thermoelectric arm are cut, so that the inclined-type polyhedral-structure thermoelectric arm can be obtained; and a cutting angle theta satisfies a relational expression that L1 / sin(pi-alpha-theta)=L2 / sin(theta), wherein L1 is the edge length of cut portions along a horizontal direction, L2 is the edge length of the cut portions along directions of the inclined surfaces, alpha is the angle of inclination of the octahedral structure, and theta is the cutting angle. With a semiconductor thermoelectric unit of which the thermoelectric arm is of an inclined-type polyhedral structure adopted, a whole thermoelectric power generation system can have higher mechanical stability, higher structural adaptability and a better heat transfer characteristic.

Description

technical field [0001] The invention belongs to the field of thermoelectric devices, in particular to a thermoelectric arm with an inclined polyhedron structure. Background technique [0002] Thermoelectric conversion technology (thermoelectric power generation technology) is a direct power generation technology. It uses the Seebeck effect of thermoelectric materials to directly convert heat energy into electrical energy without chemical reactions or mechanical movements. Therefore, thermoelectric generators have no noise and no Pollution and can work in an isolated environment, it is widely used in military industry, aerospace, solar energy, waste heat recovery and other fields. The main functional components of a thermoelectric generator are P-type and N-type thermoelectric arms connected in series or in parallel by conductive electrodes, and the two thermoelectric arms are connected alternately. A pair of P-type and N-type thermoelectric arms and the conductive electrode...

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Problems solved by technology

This is because the inclined structure leads to the deterioration of the uniformity of the current inside the inclined hexahedral thermoelectric arm under the same conditions, and there are low current density areas at both ends of the longer diagonal

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