It is a common knowledge that every air conditioning system has a thermostat. The main function of this is to set the temperature in one’s space whenever necessary or when it set to do so. The thermostat exerts its control by switching heating or cooling by regulating the flow of a heat transfer fluid as needed in order to maintain the correct temperature. Literally, it does turn on and off the air conditioning once it reaches the certain temperature that had been set up on it. There are even more advance kind of thermostat that can determine how frequent does the air conditioning needs to run in order to maintain the temperature. These over-the-top kinds of thermostats can actually adapt settings at home depending on the lifestyle. This happens for example when a house or one’s space is unoccupied, the control will automatically adjust the settings to save energy and enhance comfort. It also follows routine like sleep time or wake up time.
Now, when it comes to HVAC, there is a chance that the flow on heating and cooling demand may overflow especially if pumping system operates at its full speed. That is why there is what is commonly called as control temperature in HVAC system that has temperature controller that receives sensor signals and control heaters or other devices to maintain the preset temperature. This does not only focus on the degree of thermal condition but as well as on the humidity, pressure and flow rate control.
In HVAC, the temperature controllers have options of control methods. These could be by enumerated as follows:
- On/Off Control Action
- P Action or Proportional Control Action
- I Action or Integral Control Action
- D Action or Derivative Control Action
- PID Control
- Two PID Control
In conclusion, the thermostat and temperature controller has somehow similar function. Both of those are used in ensuring that certain preset temperature will always be achieved.
Ending this article with a note on how exactly the air conditioning and HVAC works. In AC, it is not exactly the unit gives the cooling but rather it suctions the heat of the room and pump it out outside. While on HVAC, through coolant liquid, it reduces the temperature of the air while sending hot air outside and cold air inside. The transit system for hot and cold air throughout the home is called ductwork.