LÂMINAS BIMETÁLICAS ATUANDO COMO SENSORES DE TEMPERATURA NOS TERMOSTATOS BIMETÁLICOS

Abstract

The applicability of temperature controllers occurs when it is necessary to use an electrical circuit to start a system and put a certain product into operation. Bimetallic thermostats are examples of temperature controllers, widely used in the home appliance industry, as it is a very efficient and affordable device. These thermostats have bimetallic blades that act as temperature sensors, their operation is due to the principle of thermal expansion, that is, when the current circulates through the electrical circuit, heating occurs, which causes the expansion of the bimetallic blades that do not expand, interrupting the circuit, thus avoiding the passage of current, when the current stops circulating, the system cools and the blades contract allowing the current to flow again, this is the cycle that we normally see in irons, coffee makers and electric shafts. The bimetallic thermostats, in addition to controlling the temperature, also function as protection devices for an electrical circuit, and are required by standards, since any failure in the circuit, such as overheating and variation in the current, can put people's lives at risk.