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How Nest Thermostat Work In Your Home

People with specific heating and cooling needs are likely to have spent some time looking at and operating their nest thermostat. This little gadget lets you control your home's heating and cooling systems, which are the two appliances that use the most energy and have the biggest impact on your comfort and quality of life, so it's a good thing to have. These days when energy prices are going up, it's a good idea to make sure your thermostat is working right. It's very easy to use, but it also has a lot of interesting technology in it check your thermostat .

In this article, we'll take apart a thermostat and learn how it works. A lot of other things, like digital thermostats that talk, telephone thermostats, and system zoning, will also be talked about.

There are parts of a non-digital thermostat that can still be found in older homes and motels. Before we get there, let's take a look at those parts. Let's start with the mercury switch, which is made up of a glass vial filled with real mercury. When you put mercury in water, it moves like water and conducts electricity, making it a good metal for electricity. Three wires are inside the glass vial. There is a single wire that runs along the bottom of the vial, making sure that the mercury is always in contact with it. A wire on one side of the vial comes into contact with some mercury when it's tilted so that it comes into contact with one on the bottom of the vial. This wire then comes into contact with another wire on the vial's bottom. A tilting of the vial to the right makes the third wire on the right side of its touch with mercury.

People who use this type of thermostat have a lot of thermometers. On the cover, the temperature is shown. In the top layer, there is a switch that controls the heating and cooling systems. This switch is on the nest thermostat. These thermometers are made of coiled strips of bimetallic metal. This is how they work:

Meters And Switches Are Used To Keep Track Of The Temperature.

A bimetallic strip is a piece of metal made to join two different types of metal together. This strip of metal changes shape when it is heated or cooled. Each metal grows at a different rate, and the two metals that make up the strip are chosen to grow and shrink at different rates. When the metal inside the coil gets hot, it expands, even more, causing the strip to come out of the coil.

To turn the temperature, you move a lever that moves a mercury switch at the end of a coil. The coil's center is connected to that lever, so when the coil winds or unwinds, the mercury switch moves one way or another.

There are two switches on non-digital thermostats. Small metal balls move when these switches are turned on. They touch different traces on the thermostat's circuit card. Heat or cool mode is controlled by one switch, and the fan is controlled by another. On the next page, we'll look at how these parts work together to make the thermostat work.

The Mind's Work

When you raise the thermostat temperature, the thermometer coil, and mercury switch move, causing them to tip to the left. This happens when you raise the thermostat temperature by a certain amount.

As soon as the switch turns to the left, the mercury in the mercury switch moves. This current goes through a relay, which turns on the heater and the fan in your home. As the room heats up, the nest thermostat coil slowly unwinds. This moves the mercury switch to the right, breaking the circuit and shutting off the heat so the heater doesn't work.

In this case, the air conditioner is turned on when the mercury switch is turned to the right. At some point, the thermometer coil gets longer, and the switch that reads "mercury" moves back to its right side.

Another cool thing about thermostats is that they can predict how hot they will be before it gets there. An "anticipator" turns off the heater before the air inside the thermostat has heated up to the temperature that the thermostat is set for. Parts of a house may be at the right temperature before the thermostat-controlled area. This is called "temperature drift." In this case, the anticipator turns off the heater a little early so that the thermostat can get the heat it needs to work.

In this picture, you can see a wire loop that acts as a resistor. During a power outage, the yellow wire from the mercury switch to a resistive loop sends a lot of electricity to the heater. If you look at this diagram, you'll see how it goes around the loop until you reach a wiper, then down to a circuit board on the bottom layer of your thermostat. As the wiper moves away from the yellow wire, more of the resistive wire has to be passed through (clockwise). When electricity flows through this resistor, it heats up in the same way that any other resistor would. More heat is made by the resistor when the wiper is placed further around a loop of wire. Because of the heat, the coil of the nest thermostat unwinds, causing the mercury switch to tip to the right and turn off the heater so the heater doesn't get hot.