External array-type thermoelectric generator single body provided with natural cold end

Abstract

The invention discloses an external array-type thermoelectric generator single body provided with a natural cold end. The external array-type thermoelectric generator single body comprises a high-temperature end heat exchanger, a low-temperature end heat exchanger, a plurality of heat dissipation pieces, a plurality of P-type thermoelectric arms and a plurality of N-type thermoelectric arms, a plurality of flow guide pieces, two output electrodes, heat-insulation inner filling materials, a front insulation outer shell, a rear insulation outer shell, a left insulation outer shell, a right insulation outer shell, three pairs of connecting pin holes located on tops of a left side face and a right side face of the single body, and three connecting pins, wherein the number of the P-type thermoelectric arms is the same as that of the N-type thermoelectric arms. During the use process, the number of the thermoelectric generator single bodies is determined according to the structure and the size of a specific heat source, all the thermoelectric generator single bodies are connected into a closed ring like a chain, and then electrodes of the thermoelectric generator single bodies are determined to be connected in serial or in parallel according to specific requirements. The external array-type thermoelectric generator single body uses industrial waste heat and automobile tail gas waste gas to generate electricity. Fins are used for heat dissipation, and air serves as the natural cold end. Arrangement of the thermoelectric generator single body and the number of the thermoelectric generator single bodies are determined according to the structure of the specific heat source. Universality is strong and the application range is wide.

Description

technical field [0001] The invention relates to a thermoelectric generator, in particular to an external array type thermoelectric generator unit with a natural cold end. Background technique [0002] Thermoelectric power generation is a power generation technology developed based on the Seebeck effect of thermoelectric materials. Two different types of thermoelectric materials, P-type and N-type, are connected at one end to form a PN junction, and placed in a high temperature state, and the other end is formed at a low temperature. Then Due to thermal excitation, the carrier concentration at the high-temperature side of the material is higher than that at the low-temperature side, so driven by this concentration gradient, the carriers begin to diffuse to the low-temperature side, thereby forming an electromotive force. At this time, the thermoelectric material passes through the high-temperature and low-temperature The temperature difference between the terminals convert...

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Problems solved by technology

However, most of these existing designs have the following limitations: First, most of them are built-in or cold-end built-in. Generally, a special cooling system must be designed as the cold end, and the natural cold end cannot be used; secondly, the entire temperature difference The generator is an integral structure designed for the spatial structure and size of a specific heat source. It does not support multi-purpose use in multiple occasions. It cannot be connected with multiple monomers like a chain to adjust the number of generators according to specific occasions. Such as flat and cylindrical thermoelectric generators

At present, there are few research reports on the external array thermoelectric generator unit with natural cold junction and adjustable number

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