How to Reduce the Power Consumption of Air Conditioner?

I spent my childhood in a coastal city in India. Looking back, I still remember the severe humidity and the tolerable 90 ° f heat wave mixed with each other - a typical equatorial climate. When I returned to my hometown, I found that the local temperature became higher, often exceeding 100 ° F. I also found split air conditioners everywhere; This was very rare in my childhood. Split air conditioner is composed of internal unit and external unit. The external machine is installed on the outer wall of the house, and the inside of the machine body is a condensation coil and compressor. Finally, I also found a lot of signs and advertisements from the main suppliers of air conditioning.

The power consumption of air conditioning units is very large, so with the increasing popularity of air conditioning units, energy consumption must be reduced. The only way to reduce energy consumption is to use energy-saving air conditioning and well insulated rooms. Power and seasonal energy efficiency ratio (SEER) grade are the key factors to consider when selecting an appropriate air conditioner. The higher the grade of seasonal energy efficiency ratio, the higher the energy efficiency. Fortunately, most air-conditioning brands have high energy efficiency grades.

Variable frequency drive (VFD) is used for compressor and condenser fan of energy-saving air conditioner. Another method is to use active power factor correction (PFC) in air conditioning power supply. Both trends use switching energy conversion in the system, while before, compressors and fans relied on inefficient line frequency electronic technology for power supply. VFD installs a motor in the compressor unit to realize speed change by adjusting the voltage, current and frequency of power transmitted to the compressor. Therefore, the system does not need to run at full speed. This way significantly reduces energy consumption, which is the biggest benefit of VFD so far. Since the air conditioner will operate at a high power of usually several thousand watts, the use of active power factor correction can improve power quality and reduce harmonic distortion. At the same time, it also reduces the reactive power that eventually returns to the grid as dissipated power or idle power.

Both VFD and PFC of air conditioning unit need high-voltage system, which is developing to the solution of executive integrated circuit (IC). By using appropriate power IC, such as ucc21520 and other high-voltage isolation drivers, you can provide an ecosystem for the air conditioner to ensure high system level efficiency and reduce the bill of materials cost, so that you can effectively keep cool and comfortable by using the air conditioner.

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