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How does inverter technology help with saving electricity?

Air conditioners are a pain for most people in our country who are concerned about their electricity bill. The moment an air conditioner is added to the list of devices used in a household, the electricity bills increase considerably. Although it is difficult to significantly reduce the “big” impact of an air conditioner on your electricity bill, part of it can be managed by choosing the right technology, doing the right installation / maintenance / operation and by properly insulating the room where the air conditioner is used (more information in our articles at the end of this article).

When it comes to technology, there weren’t many available until somewhere back. When BEE started actively analyzing and labeling the air conditioners, we got some good ones in the form of 5-star air conditioners. The latest and most efficient technology available on the market today is inverter technology for air conditioners.Some companies offers you the best Inverter AC price in Pakistan which is designed to save 30-50% electricity (used units) compared to a normal air conditioner.

 How does an air conditioner work?

For most people, the air conditioner simply throws cool air to the temperature it is set to. But does it really work that way? In fact, during the cooling process, the air conditioner takes in the indoor air, cools it by passing it through the evaporator, and throws it back into the room. It is quite the opposite of how our good old air coolers worked. Air coolers used to take in outside air, cool it with water and throw it in. But air conditioners simply work on internal air. Together with the evaporator, the air conditioner also has a compressor that compresses the gas (coolant) into the alternating current to cool it which in turn cools the incoming internal air from the room.

 In a normal air conditioner:

The compressor is off or on. When switched on, it works at full capacity and consumes the full power it is designed to consume. When the thermostat reaches the temperature level set in AC, the compressor stops and the fan (in AC) continues to operate. When the thermostat detects that the temperature has risen, the compressor will restart.

Inverter AC price in Pakistan

 In an air conditioner with inverter technology:

The inverter technology works like a gas pedal in a car. When the compressor needs more power, it gives it more power. When it needs less power, it gives less power. With this technology, the compressor is always on, but uses 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. This technology was developed in Japan and is successfully used for air conditioners and refrigerators there. This technology is currently only available in split air conditioners.

 What are the benefits of Inverter Technology?

Each air conditioner is designed for a maximum peak load. So an AC of 1.5 tons is designed for a certain size of the room and 1 ton for a different size. But not all rooms are the same size. A normal air conditioner with a capacity of 1.5 tons always works at peak power when the compressor is running. An air conditioner with inverter technology will work continuously, but only draws as much power as is needed to keep the temperature stable at the desired level. So the type of capacity adjusts automatically based on the needs of the room it is cooling. As a result, much less electricity is used and fewer units of electricity are used.

Although air conditioner with Inverter Technology adjusts its capacity based on the required space, it is very important to install the right size air conditioner in a room. Make sure you evaluate the capacity of the room and the air conditioner before you make a purchase. Keep an eye on this space while we are making a comparator for saving electricity in different air conditioners.

 Do air conditioners with inverter technology cool down slowly?

Several people worry that air conditioners from the Inverter Technology will not cool properly or slowly. However, let’s take this image as a reference to understand how AC inverter works:

Non-inverter ACs are fixed-speed ACs, while ACs for inverters are variable-speed ACs. Non-inverter ACs have compressors that go “On” and “Off”. While inverter ACs have compressors that are always “On”. Because non-inverter ACs are suitable for peak loads in the summer, they are all too large at other times (in fact, most people are even too large for the peak season). The disadvantage of the same is that the AC is usually “Overcooled”. So if you set AC to a temperature of 25, it will be cooled to 23 or 22.


Now you would wonder: what is the use of the thermostat? Well, the thermostat (in a non-inverter AC) switches the compressor off when the outside temperature has reached 25. But a lot has happened before that. In an alternating current, refrigerant moves from liquid to gas (by taking heat from the room) and then back from gas to liquid when the compressor compresses it. But if the coolant is more and the heat in the room is less (which happens with extra large AC), it does not get enough heat from the room to convert from liquid to gas and it continues to move as liquid. When the thermostat now detects temperature and the compressor switches off, the coolant still remains in the liquid state and therefore has the capacity to absorb heat from the room and convert it into gas. And so it takes more heat out of the room and cools the room below the set temperature.

So the difference is: non-inverter AC would be too cool like in the picture. While inverter AC cools optimally. And so one may have the feeling that AC of the inverter is not cooling or slow.

 Less known benefits of Inverter Technology

Normal motors require 3-4 times more power (more than running power) when starting up. So the size of the inverter / generator required for an AC or refrigerator to work is considerably increased. But inverter technology air conditioners and refrigerators have variable speed motors that gradually require much less power when starting up. The required inverter / generator is therefore smaller. For e.g. A fixed-rate 1.5 tonne AC running on approximately 10 Amp current may require up to 30 Amp current at start-up and therefore a 5 kVA inverter / generator. But an air conditioner with inverter technology requires about 6-7 Amp of power and not much more at start-up, so a 1.5kVA or 2kVA inverter / generator is good enough to support it.

Normal motors have a much lower power factor. In commercial and industrial connections there is a fine for low power factor and discounts for higher power factor. A motor with inverter technology will have a power factor close to the unit (or 1), which not only results in lower electricity consumption, but also helps to get discounts on a better power factor.

For more info click here: General AC in Pakistan

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