Last Updated on April 14th, 2021 by RefrigeratorPro Team
Many new refrigerator models have come up with inverter based models. Customers have questions such as What is an inverter refrigerator? Do I need an inverter refrigerator?. We will help you with the answer to these questions.
Table of Contents
- What is an inverter compressor?
- How does an inverter compressor work?
- Advantages of Inverter Refrigerator
- Types of Inverter Compressors in a Refrigerator Brands in India
- How Does an Inverter Compressor Save Electricity?
- Inverter Compressor Refrigerators – FAQs
What is an inverter compressor?
A compressor is the engine of a refrigerator. It is responsible for constant flow of refrigerant and it also compresses it to convert it into high-pressure liquid. The speed of the compressor determines the cooling of refrigerator.
For example, as soon you switch on a refrigerator with regular compressor, the compressor runs at full speed to reach the desired temperature. And as soon as it reaches this temperature, it switches off, so that the cooling stops. And when the temperature starts rising again, the compressor switches on to decrease the temperature. This is an “on” and “off” cycle.
An Inverter compressor, on the other hand, is a compressor that it controlled by inverter chip. It means that the speed of the compressor is controlled by inverter chip and the software in it. This gives better and efficient cooling.
Because of its energy saving capability and noise-free operation almost all top brands have come up with inverter refrigerators
How does an inverter compressor work?
As discussed, regular compressor (reciprocatory compressor) works by switching on and off regularly to maintain a range of temperature.
For example, to maintain a temperature of 5 degree Celsius, as soon as you start the refrigerator, regular compressor will run at full speed to reach 5 degrees and then it will stop. When the temperature starts to increase again it will again run at full speed for some time till the temperature reaches 5 degrees and stop again. This means that the temperature does not remain constant and goes through up and down cycle. As you can see, this not a an efficient way to cool.
On the other hand inverter compressor maintains the temperature constantly by regulating the speed of the compressor. It never switches off and runs at slow speed to keep the temperature constant.
It means that the compressor will not have to work at full speed and then stop abruptly like regular compressors.
Advantages of Inverter Refrigerator
Consumes Less Power
Biggest advantage of an inverter compressor is that it is more energy efficient as compared to regular compressor. This is because the inverter compressor runs constantly at optimum speed. In some cases, it is 40% more energy efficient.
Inverter compressor is able to maintain freshness better than regular compressors because the temperature inside the fridge remains constant.
Regular compressor experiences more wear and tear because the it starts and stops many times. And just like many other machines, whenever it starts and stop, it faces slight wear and tear. This decreases the life of regular compressor. However inverter compressors runs constantly and it reaches maximum capacity slowly. This leads to long life.
Inverter compressor produces less noise because it is better regulated. Regular compressor produces more noise whenever the compressor is in ‘on’ state.
Almost all refrigerators use refrigerants with some level of Global Warming Potential (GWP). This is not good for the environment. Since inverter refrigerators use less energy, its impact on the environment is less.
Can Connect with Home Inverter
Usually, refrigerators with inverter technology can connect with the home inverter with batteries. Even though we do not highly recommend this because refrigerator loaded high and may not be ideal for home inverters. However, in some occasions you may connect lower capacity inverter refrigerators to your home inverter.
Types of Inverter Compressors in a Refrigerator Brands in India
Whirlpool’s Intellisense inverters are equipped with multiple sensors to regulate the temperature as per the temperature inside the refrigerator, amount of food present inside the refrigerator and user behaviour.
First sensor finds out the current temperature inside the fridge. Second sensor detects the volume of food inside the fridge and the third sensor detects the user behaviour. The data from all the three is fed to a chip and analyzed to give most optimum temperature.
Inverter Linear Compressor
Regular inverter compressor consists of several friction points, whereas the electromagnet setup in linear compressor reduces the friction point to only one. This, saving power and producing less noise.
Whirlpool launched plasma inverter in the year 2019. It is an enhanced version of Intellisense inverters. These similar to intellisense inverters in its working and come with 3 sensors. However, the compressor rod is covered with plasma coating. This helps in increasing the lifespan of the inverter compressor. In fact, it imporves the lifespan of inverter compressor by 25% to around 25 years.
Brands such as Samsung come with ‘digital inverter’ technology in their refrigerators. It is not much different from inverter technology because most of the inverters are ‘digital’ anyway. However, Samsung inverter allows 5 adjustable speeds, which gives decent level of cooling precision.
Panasonic launched Econavi inverter in 2018 in India. It is Equipped with 2 types of sensors. First sensor detects human activity such as movement and other human behaviour, while the second sensor detects sunlight intensity. Both the sensor data is fed into their algorithm that then regulates the compressor to give optimum cooling based on the inputs.
Twin Inverter technology was introduced in India by Haier in 2019. This intverter compressor comes with smart sensors that adjust the cooling based on the load. We found that there is not much difference between a twin inverter and other digital inverters and is more of a brand name.
You will see smart inverter refrigerators in many LG refrigerators. Smart inverters are again very similar to digital inverters. In this inverter, a dedicated microprocessor chip regulated the motor to control the compressor. Mostly single door refrigerators come with this type of inverters.
You will Nutrifresh Inverters in Godrej refrigerators. It senses the type of feed inside the refrigerator and gives vooling based on this information. However, there is not much difference between a digital inverter and this inverter that is also controlled by a microprocessor.
How Does an Inverter Compressor Save Electricity?
As discussed, regular compressor works by switching on and off regularly. In fact a regular compressor can switch on and off 6 to 8 times in one day.
- It is important to understand that maximum current is consumed in switching on a compressor.
- On top of this, every time the compressor starts, it runs at full speed irrespective of the cooling requirement. Even though it stops when the desired temperature is reached, it consumes good amount of electricity in this process.
On the other hand, when you switch on an inverter refrigerator, following things happen.
- The compressor will start with slow speed and then increase the speed gradually till it reaches the desired temperature. This consumes less electricity.
- When it reaches the desired temperature, it decreases the speed to a minimum level required to keep the temperature constant. This is also very energy efficient.
These are the reasons why some inverter refrigerators are even 40% more energy efficient as compared to non-inverter refrigerators.
Inverter Compressor Refrigerators – FAQs
What is the difference between digital inverter compressor and smart inverter compressor?
There is not much difference between Digital inverter and Smart inverter. Samsung brands its inverter technology as digital inverter tech, while LG brands it as Smart inverter technology.
What is reciprocating compressor in a refrigerator?
Reciprocating compressor is a type of standard compressor. It means that it goes through the on and off cycle and is less energy efficient, less durable and produces more noise than inverter compressor.
How long will my inverter compressor last?
Life of an inverter compressor is usually a high 20 years. Some inverter compressors come with plasma coating. This increases the life of these inverters to 25 years.
How do I know if my refrigerator has inverter?
Regular compressors make more noise when they switch ‘on’. Therefore if you have a single door refrigerator that makes noise then there is high chance that it does not have an inverter. On the other hand if you have a double door refrigerator, that makes little noise then chances are that it is an inverter based refrigerator.