A temperature switch is a switch that determines whether to turn on or off based on the temperature of the object being controlled; According to their different action principles, they can be divided into bimetallic, pressure type, and thermosensitive ferrite type. Regarding bimetallic temperature switches: Various metals have the characteristic of thermal expansion and contraction, and different metals have different coefficients of expansion with temperature changes. The bimetallic temperature switch works based on this principle, The bimetallic sheet is composed of a high manganese alloy on the upper layer and an invar steel on the lower layer. The former has a coefficient of expansion several tens of times that of the latter, known as the active layer and At normal temperature, the contacts A and B of the copper sheet and spring sheet in the passive layer are connected, and the entire circuit is in a connected state. When the temperature rises, the active layer expands more than the passive layer, and the bimetallic sheet bends downward. When the temperature rises to a certain extent, the circuit is disconnected. When the bimetallic sheet cools to a certain extent, it recovers and the circuit is connected.
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Precautions for installing temperature switches:
1. During installation and use, do not touch the shrapnel or temperature sensitive parts, otherwise it may cause the temperature of the protector to be inaccurate, poor contact, and abnormal operation.
2. During installation, make the contact surface facing away from the windward side to avoid the impact of blowing air on the spring function and the accumulation of dust on the surfaces of contacts A and B, which may cause poor conductivity.
