Cooling and heating two-purpose air supply device based on thermoelectric materials

Abstract

The invention discloses a cooling and heating two-purpose air supply device based on thermoelectric materials. The air supply device comprises an outer casing comprising an accommodating cavity inside; a fan, thermoelectric units and a control unit are mounted in the accommodating cavity of the outer casing; the control unit is used for controlling the fan and the thermoelectric units; an air inlet, an air outlet and a heat dissipation opening are formed in the outer casing; the thermoelectric units adopt thermoelectric pieces made of the thermoelectric materials; the front sides of the thermoelectric units are arranged in an air path passing through the air inlet to the air outlet; the back sides of the thermoelectric units are arranged in the air path passing through the air inlet to theheat dissipation opening; the air supply device further comprises first heat exchange structures and second heat exchange structures; the first heat exchange structures are overlaid on the front sides of the thermoelectric pieces to form heat transfer cooperation and exchange heat with the air flow in the air path from the air inlet to the air outlet; the second heat exchange structures are overlaid on the reverse sides of the thermoelectric pieces to form heat transfer cooperation and exchange heat with the air flow in the air path from the air inlet to the heat dissipation opening; and theair supply device further comprises thin-film heaters overlaid on the top surfaces of the first heat exchange structures to form heat transfer cooperation. According to the air supply device, after the smaller heat exchange structures are adopted, the cooling performance of the thermoelectric pieces can still be improved effectively.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a dual-purpose air supply device for heating and cooling based on thermoelectric materials. Background technique [0002] Thermoelectric materials are functional materials that can convert thermal energy and electrical energy. The Seebeck effect discovered in 1823 and the Peltier effect discovered in 1834 provide a theoretical basis for the application of thermoelectric energy converters and thermoelectric refrigeration. [0003] The characteristic of a thermoelectric material is that when it is electrified, one of its working surfaces behaves as a cooling surface with a temperature drop, and the heat on the cooling surface is transferred to the other working surface, so the other working surface will behave as a cooling surface with an increasing temperature , the temperature of the cooling surface remains higher than that of the cooling surface; correspondingly, after ...

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Problems solved by technology

Therefore, limited by the process, it is impossible to form more heat sinks on the heat sink, which directly limits the heat exchange area of ​​the heat sink in contact with the air, which inevitably leads to the problem of reduced heat exchange efficiency, which in turn leads to the restriction of the cooling performance of the thermoelectric element.

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