FIELD: electrical engineering; thermoelectric mats for heating concrete, soil, fillers, and the like.
SUBSTANCE: proposed thermoelectric mat has layer-by-layer arranged external moisture-proof insulating coating contacting surface being heated in the course of mat operation, heating element made of at least two parallel strips of flexible nonmetal current-conducting material separated by insulating inserts and provided with electrodes at edges, internal insulating layer, heat-insulating layer, and moisture-proof coating; thickness of external moisture-proof insulating coating 
where h is thickness of external moisture-proof insulating coating; K1 = 0.01 - 0.03 is factor depending on kind of material being heated; K2 = 0.01 - 0.06 is factor characterizing strength of external moisture-proof insulating coating material; S is thermoelectric mat surface area; internal insulating layer is disposed under elastic conducting strips at distance of minimum 1 mm therefrom.
EFFECT: enlarged service life of thermoelectric mat.
1 cl, 2 dwg
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