The compressor – heart of the cooling appliance expels out heat by compressing refrigerant through the condenser of an air conditioner. Inverter compressor brought significant innovation in the air conditioner, leading to a revolution in the working strategies of a Compressor.
What is Inverter Compressor technology?
Non-Inverter AC compressors can run only at fixed RPM. They either work on 100% capacity (ON condition) or just 0% (Off condition). Inverter Compressors work with a variable-frequency drive to control the speed of the motor, and thus vary speed (RPM) of the compressor, based on the thermal load. It can consume significantly lower electricity (around 30% less) when operated for long hours at a moderate temperature. Below Fig 1 & Fig 2 shows the Working of AC with Inverter and without Inverter, efficiently with speed rotation and capacities & power consumption rates, respectively.
Fig1-Working of inverters
Think of an inverter compressor as a car accelerator. When the compressor needs more power, the inverter gives it more power and vice versa. With inverter technology, the compressor is always-on but draws less power or more power depending on the temperature of the incoming air and the level set in the thermostat. The speed and power of the compressor are adjusted appropriately, allowing more precise cooling and significant energy savings. Fig 3 shows the Cooling structure of Inverter & Non-inverter AC. Inverter AC gives comfort cooling as the grill temperature variation is just ±0.5°C compared to ±2°C in non-inverter AC.
Inverter compressor has a single rotor which operates on a single rotation single compression principle. But this design generates more vibration and noise. Compressors in Duel Inverter AC have two rotors placed at 180°, which compresses two Frames per rotation. Dual rotor compressors are more balanced, allowing very less vibration and noise. In Triple inverter, there are two rotors like dual Inverter compressors, and the only difference is in the motor. Triple inverter compressor has 8-pole motor contrary to the conventional 4-pole, which is capable of running at even lower RPM and therefore has less vibration and noise.