How Does The Thermostat Ecobee Work?
When it is cold, we walk and raise the thermostat ecobee, and when it is hot, we walk and turn on the air conditioner to cool down. But how does this little box on the wall control the temperature of our homes or offices?
The mechanical thermostat ecobee is really a very simple device.
This is basically a thermometer connected to a switch that turns on your heater, regardless of whether your source of heat is natural gas or electricity. If you remove the cover of your thermostat ecobee, you will see the internal work and better understand how the thermostat ecobee works.
The top layer contains a mercury switch and a thermometer coil. A mercury switch is just a small bottle of liquid metal, mercury. Inside this bottle are three cables: one at the bottom of the bottle; one to the left of the vial; and one to the right of the vial. As the temperature rises or cools, the mercury bottle tilts to the right or left, which causes the corresponding cable to come in contact with the cable that runs along the bottom. If the mercury is tilted to the left, a connection is created that creates a current that energizes the relay, which turns on the heater and the circulation fan. When the room heats up, the vial levels off, and as soon as it comes to balance, the connection is broken and the heater shuts off. If the mercury switch is tilted to the right, another relay causes the air conditioner to turn on.
What tilts the tube in any direction is the thermometer coil, which rests against the mercury tube.
The thermometer coil is built with a bimetallic strip made of two different types of metal, usually copper and iron, which are connected together. Since different metals react to heat at different levels, this band shrinks and expands, causing the coil to bend or unscrew as the temperature changes. This swirling or unscrewing movement tilts the mercury vial, which then tells the heat source to start or turn on. When you adjust the temperature knob on your thermostats ecobee, you are actually setting the heat exchanger setting.
Under the top layer of your thermostat ecobee, you will see a circuit board containing cables that actually lead to a circulation fan and a heat source. The PCB is connected to the mercury switch with a screw and a metal cable that “reads” the switch and turns on the appropriate heating or cooling device.
The newest on the market are digital thermostats ecobee.
These thermostats ecobee differ from mechanical thermostats ecobee in that they use a thermistor, the resistance of which electrical resistance varies with temperature. The microcontroller in the digital thermostat ecobee measures the resistance and converts this number into a temperature reading. Digital thermostats ecobee can save energy because they can be programmed to turn off or turn on air conditioning or heating at certain times during the day. For example, you can set up the air conditioner for one hour before returning home or turn off the heater during the working day, and then turn on one hour before returning to warm the house and invite it when you open the door