What is Dual Inverter Air Conditioner?

Last Updated on July 3, 2022

There are various air conditioners in the market. The goal is to achieve quick cooling with maximum power efficiency to reduce electricity bills and have a silent operation.

One of the types of air conditioner available in the market that is actually the advanced form of inverter air conditioner is called dual inverter air conditioner. What is the dual inverter air conditioner and how it operates? This article is specifically covering that.

Dual Inverter Air Conditioner is an advanced form of Inverter Air Conditioner that has twin rotary compressor contrary to simple inverter air conditioners. It allows more stable operation resulting in reduced energy consumption due to more variation in tonnage, less noise and quicker cooling by the operation of twin rotary compression.

The operation of the twin rotary compressor operating in dual inverter air conditioner is equivalent to two compressors operating in simple inverter air conditioner.

However by the application of twin rotary compressor a single compressor is able to provide higher compression with reduced rpm or speed. Thereby preventing high speed operation and eventually reducing vibration and power usage.

What Is An Inverter Air Conditioner?

An air conditioner that does not use inverter technology i.e. a non-inverter air conditioner has limited functioning when it comes to power consumption efficiency and variability in operation.

When you turn on a non-inverter air conditioner it starts cooling the room until the desired temperature is achieved at which the air conditioner is set. When the thermostat in the air conditioner senses that the desired temperature is achieved it turns the compressor off and the power supply to the air conditioner is cut-off.

This means that a non-inverter air conditioner can only operate on two power modes i.e. on and off. Thereby either the air conditioner is operating at full power or no power. This simple turning on and off consumes a lot of power.

Especially non-inverter air conditioner is highly inefficient when the temperature is increased a little bit and the air conditioner starts operating at full power.

On the other hand if you have an air conditioner with inverter technology it saves a lot of power. An inverter air conditioner is able to adjust the power it consumes according to the operation required.

For example you have turned your Inverter Air conditioner on and set on a desired temperature. The air conditioner will operate at full power to cool the room. However when the room temperature comes closer to desired temperature the power consumption by the air conditioner is reduced. It will be reduced as long the desired temperature is achieved.

The less the difference remains between the room and desired temperature the less is the compressor speed and the less is the power consumption. Hence the inverter air conditioner is able to adjust its compressor operation and power consumption according to the requirement.

This makes the air conditioning highly efficient. Further when the temperature of the room rises a bit from desired temperature the inverter air conditioner will not start operation at full capacity but it will consume the same reduced power consumption due to reduced compressor operation.

What Is Dual Inverter Air Conditioner?

Dual Inverter Air Conditioner is an advanced version of simple inverter air conditioner. It has the same capability to reduce the power consumption according to the operation required but better.

Dual Inverter Air Conditioner uses twin rotary compressor contrary to simple inverter air conditioner that uses single rotary compressor. In single rotary compressor there is single roller or impeller as indicated in the figure. However a dual rotary compressor consists of two rollers and impellers for the compression of refrigerant.

The use of two impellers requires lower rotational speed compared to single impeller compressor to be able to compress and deliver the same amount of refrigerant.

The ability to perform the same operation at lower rotational speed with the delivery of same amount of compressed refrigerant compared to single rotary compressor operating at much higher speed makes dual inverter air conditioner more efficient.

Hence in general the inverter air conditioner consumes lesser power compared to non-inverter air conditioner. However dual inverter type air conditioner has even low power consumption than single rotary compressor inverter air conditioner with other incentives.

Why Use A Dual Inverter Air Conditioner?

Using a dual inverter air conditioner gives you reduced power consumption. However it has other benefits which makes the air conditioning experience better in other ways. Here are the advantages of air conditioner and why using a dual inverter air conditioner is a better choice:

Lower Energy Consumption and Efficient Operation

Dual Inverter Air Conditioner is able to operate at a very low power consumption compared to an non-inverter or even inverter air conditioner with single rotary compressor.

The reason why it is able to perform the same cooling operation with very low energy consumption by the compressor is because it uses twin rotary compressor.

The twin rotary compressor is able to provide the same amount of compressed refrigerant compared to simple inverter air conditioner but at lower rotation speeds. This means by the application of dual inverter air conditioner about same amount of compressed refrigerant required is delivered with rotational speeds about half as required in the simple inverter type.

Slower speeds require slow motor operational speed. The inverter air conditioner generally uses BLDC (Brushless Direct Current) Motor. As the RPM (Revolutions per Minute) for the motor to be operated in dual inverter air conditioner is less hence it will require reduced electricity consumption. Hence the overall efficiency of the dual inverter air conditioner will highly increase.

 The dual inverter air conditioner reduces electricity consumption potentially up to 70% compared to non-inverter air conditioner.

The dual inverter air conditioner variability in tonnage for the efficiency of operation in cooling is more compared to ordinary inverter air conditioner. Hence it will better control the power consumption with extended variability.

Faster Cooling

Twin rotary compressor in dual inverter air conditioner with two impellers has the capacity to provide more compressed refrigerant compared to single rotary compressor.

For each revolution the amount of air compressed and delivered by twin rotary compressor is almost double compared to single rotary compressor. Hence at the same RPM the twin rotary compressor in dual inverter air conditioner will deliver double. This will result in faster cooling of the air by the application of dual inverter air conditioner.

LG claims that its dual inverter provides 40% higher cooling compared to single rotary compressor air conditioner.

Reduced Vibration and Better Stability

Dual Inverter Air Conditioner has two impeller or rollers for the compression of air. Single rotary compressor has one impeller on the shaft rotating inside the compressor casing. This may result in misbalancing of the rotational masses.

The centrifugal force on the shaft will direct the shaft towards the impeller during the rotation. This force will increase with increase the speed of the rotation. This is the factor that will contribute to extended vibration and limit the highest RPM at which the compressor can be operated.

On the other hand twin rotary compressor in dual inverter with two impeller has balanced rotational masses on either side. They are both on the same shaft called the rotor shaft operating at a phase difference of 180 degrees. So the centrifugal force developed by each roller or impeller is balance by the other. This results in better stability and reduces vibrations during the dynamic operation of air conditioner.

Reduced Noise

The balanced impellers on either side of the rotor shaft in twin rotary compressor due to 180 degrees phase difference results in stable operation with reduced torque variation. The decrease in vibration results in the decrease in the noise generated by compressor.

Further for the same amount of cooling to be generated as for simple inverter air conditioner twin rotary compressor due to increased compression is able to do it at lower rotational speeds. The less compressor speed will result in lesser noise generated by compressor.

Conclusion

Dual Inverter Air Conditioner uses twin rotary compressor that is able to perform cooling better and much more efficient compared to non-inverter and simple inverter air conditioner. The twin rotary compressor also allows mores stability during the air conditioning operation preventing noise and vibration.