Thermopile and automobile exhaust waste heat generation and refrigeration device employing same

Abstract

Various types of automobile exhaust waste heat generation devices at present are complex in process, high in cost, low in integration level, large in size and low in heat-electricity conversion efficiency. The invention discloses a thermopile which is high in integration level, simple in structure, low in cost and high in reliability; the invention also discloses an automobile exhaust waste heat generation and refrigeration device employing the thermopile as a core part for generation and refrigeration. P-type thermocouple arms formed in the shape of a rectangular cylinder and N-type thermocouple arms are arranged in a staggered manner. A heat-insulation and insulting film material is arranged between the adjacent thermocouple arms in an attaching manner for isolation, so that the convection of air is eliminated, the defect of the reduction of the temperature difference between cold and hot surfaces caused by radiation is overcome, and the heat-electricity conversion efficiency is improved. The electric connection between the thermocouple arms is achieved through flexible heat-conduction and electric-conduction materials, so that a thermal stress is alleviated, the adverse effect of the thermal stress on a product is eliminated, and the problem that the reliability and the service life of the product are affected seriously, caused by the deformation and cracking of the thermopile and falling of welding spots between the thermocouple arms which are caused by the thermal stress, is solved.

Description

technical field [0001] The invention is related to temperature difference thermoelectric power generation and thermoelectric refrigeration technology, especially related to automobile tail gas waste heat power generation and refrigeration technology. Background technique [0002] Semiconductor thermoelectric power generation technology uses the Seebeck effect to directly convert thermal energy from temperature difference into electrical energy. It has the advantages of small size, light weight, no vibration, no noise, and long life. It has broad prospects for industrial waste heat or waste heat utilization. Although semiconductor thermoelectric power generation has been used in many applications, the integration of thermopile (or thermoelectric module), which has played a key role for a long time, is not high. As a result, the conversion efficiency, space occupied and manufacturing cost of thermoelectric power generation devices limit thermoelectric thermoelectric power gener...

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Problems solved by technology

Although semiconductor thermoelectric power generation has been used in many applications, the integration of thermopile (or thermoelectric module), which has played a key role for a long time, is not high, resulting in the conversion efficiency, space occupied and manufacturing cost of thermoelectric power generation devices limiting thermoelectric thermoelectric power generation and refrigeration. Wide application of technology in automobiles

In the current thermopile, there are enough row and column gaps between the series of thermocouple elements arranged in rows and columns in a two-dimensional matrix, resulting in low integration, and there is air gas in the gap, which will make the heat of the thermopile Heat convection and radiation are generated between the surface and the cold surface, reducing the temperature difference ΔT between the hot surface and the cold surface of the thermopile, which directly leads to the reduction of the electromotive force of the thermocouple

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