Thermostats
With the purpose of cooling or air-conditioning system is to reduce or maintain temperature, thermostat is installed, in most cases, a stop of the equipment or reduce its capacity, when the necessary conditions. The following types are used:
- Movement of the bimetallic element
- Expansion of the liquid
- Pressure of saturated vapors of volatile liquids. Above produce the mechanical effect, which can be used directly for the work of the electric switch or modulate the pressure jets of air in pneumatic systems.
- Electrical resistance
- Electronic - various types
These last two produce an electric signal, which must be measured and strengthens the work of the managed device. In order to prevent excessive Cycling, differential, say, 2 K should be included.....
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