Functionality

Snap-action thermostats, also known as bimetal thermostats, operate on a simple but effective principle. Inside the thermostat is a bimetallic strip consisting of two metals with different coefficients of expansion. These metals are firmly bonded together. When the temperature changes, the two metals expand at different rates. This causes the bimetallic strip to bend. At a certain temperature, the deformation of the bimetallic strip reaches a point where a snap mechanism is triggered. This mechanism opens or closes the circuit quickly and precisely. The fast switching action ensures that the thermostat works reliably and accurately by interrupting or restoring the flow of current to maintain the desired temperature.

Areas of application

Bimetal thermostats are versatile and can be used in many areas:

• Heating, ventilation, and air conditioning (HVAC) systems: They are used to regulate the temperature in heating systems and air conditioning systems to ensure a constant room temperature.
• Household appliances: They ensure the correct temperature control in appliances such as irons, coffee machines, and kettles.
• Automotive industry: Bimetal thermostats are used in vehicles to control the engine temperature and regulate the heating.
• Industrial applications: They are used in machines and systems to prevent overheating and monitor the temperature of processes.
• Electronic devices: In some electronic devices, they are used to monitor the temperature and interrupt the flow of current if necessary.