Should I buy an inverter air conditioner or a mechanical air conditioner?

What is the working principle of inverter air conditioner and mechanical air conditioner?

Inverter air conditioners in Vietnam have become more and more popular according to the gradually increasing living standards of people as well as the cheaper price of air conditioners following that general trend.

Many low-cost air conditioners also bring inverter technology to their products, making it a lot simpler to own one or more inverter air conditioners for the family.

The question is whether to buy an inverter air conditioner or not when it is more expensive than a normal air conditioner (mechanical air conditioner)?

Mechanical air conditioner

điều hòa cơ

Working mechanism of air conditioner
  • It works on the principle of converting electrical energy to thermal energy.
  • Conventional air conditioners have 1 indoor heater and 1 outdoor unit.
  • The outdoor heater contains a motor, also known as a compressor, with the role of compressing the refrigerant (gas) into a liquid form.
  • This liquid will be transferred to the cold block.
  • In the refrigerant unit, this liquid refrigerant will be converted into a vapor (reduced pressure).
  • This decrease in pressure will lead to heat collection from the environment, causing the air temperature at the indoor unit to decrease.
  • The fan from the indoor unit rots this cold out and we have the desired cold air.
  • And according to the law of conservation of energy, here is electrical energy into mechanical energy in the compressor and this mechanical energy converts into heat energy in the indoor unit.
How does an air conditioner regulate the temperature?
  • Understand the working mechanism of mechanical air conditioners.
  • When you start the air conditioner, cold air is continuously blown into the room through the blower.
  • Mechanical air conditioners will use a temperature sensor (sensor) to detect the temperature in the room and turn off the engine (Off).
  • When the temperature in the room gradually heats up, this sensor returns a signal and the machine control board works again (On) to continue cooling the air.
  • That is also the reason that mechanical air conditioner is also known as On/Off air conditioner, turns on when the air temperature is hot and turns off when the room temperature has reached the set level.
  • The problem here is that there will always be a difference between the set temperature and the actual temperature in the room.
  • If you set the desired temperature to 26°C, the unit will need to operate to bring the room temperature down to about 24°C before shutting off.
  • Then, when the room temperature reaches about 28°C, the machine will work again.
  • Thus, you want to use it at 26°C, but you will experience frequent hot and cold sensations.

Inverter air conditioner

How inverter air conditioner works

  • Inverter technology, also known as inverter (changes frequency) works of the motor (compressor) so that the machine works continuously without interrupting.
  • At first glance, it may seem like it will make the device less durable but in fact it is not.
  • When starting up, the inverter air conditioner is like a normal air conditioner, but all the processes are through an inverter board, only reducing the operation of the compressor, not stopping it completely (reducing the frequency).
  • So if you set the desired temperature to 26°C, when the room temperature reaches about 25.5°C, the machine will adjust so that the engine runs idle enough to provide cold air only.
  • When the room temperature reaches about 26.5°C, the sensor will send a signal to the board, adjust the compressor speed (increase the frequency) to bring more cold air to the indoor unit, and so on the operation of the motor. Inverter air conditioner according to sinusoidal mechanism with low wavelength.

Which type of inverter air conditioner and mechanical air conditioner save more electricity?

  • Most users are sure that many will immediately answer that inverter air conditioners are more energy efficient.
  • But that is due to the influence of media and advertising is the main.
  • Mechanical air conditioners have a rest period, so in fact at that time the electricity consumption is low, the inverter air conditioner works continuously but only at a moderate or low capacity.
  • Imagine with the same distance, for 2 runners to run together.
  • Condition your muscles like a short runner, run fast until a point, then rest for a while, recover and continue running.
  • Inverter air conditioner is like an endurance athlete, running continuously even though it is not running very fast.
  • If according to the law of conservation of energy, run and then rest or run continuously, the effort is still the same.
  • Inverter or On/Off does not save more electricity or consume more electricity due to cooling the room, but the power consumption lies in turning off the motor, the outdoor fan.
  • Each phase of restarting the engine from zero of the air conditioner will consume more energy than adjusting the speed up or down.
  • According to the calculations of experts, this loss and the loss in the motor always having to run at 100% capacity will be about 10 to 15% compared to inverter air conditioners.

Which air conditioner saves energy up to 70%?

  • In my opinion, having air conditioners that save energy up to 100% is the wind.
  • When using an air conditioner, you must determine that it is a fairly power-hungry device.
  • The psychology of consumers is that any company that advertises power saving more strongly is better.
  • But that's under ideal conditions, experiments and of course most of it's advertising language with the actual % not high.
  • With my analysis above, you can see for yourself that inverter air conditioners save more electricity than mechanical air conditioners, but the number is only limited.
  • again at 10, 15% depending on the company.
  • Firms that do better save electricity will optimize in the new generation refrigerant (gas) with higher cooling efficiency, using inverters for both compressors and fan motors, limiting power loss in just here.
  • Don't believe 4000 VND/night, don't believe save 70% of electricity, be wise.

Inverter air conditioners use a lot to save electricity?

A statement that is so wrong that many salespeople or websites still make such a statement?

điều hòa inverter

  • Where is the information saying that you need to use the inverter air conditioner for about 8 hours to save electricity, and if you use less, it is like a mechanical air conditioner?
  • So to understand in the most crude way is that at 7h59 minutes you are using with the same amount of electricity consumed as a mechanical air conditioner, then all of a sudden, switching to the 8th hour, you save up to 15% of the electricity of the whole process. previous user?
  • If you have understood the energy saving principle of inverter air conditioners, you will no longer be naive with this statement.
  • Inverter air conditioners save more electricity than mechanical air conditioners from the moment they turn on and use, whether they use less or use more.

What other advantages do inverter air conditioners have?

  • In addition to saving energy, which is the most important factor that consumers aim for, air conditioners also cleverly add more comfort features on these inverter air conditioner models.
  • When it is technology to repel mosquitoes, technology to filter fine dust, technology to avoid drying the skin or technology to deodorize, kill bacteria, ...
  • In general, all the most advanced things are usually integrated on inverter air conditioners, while mechanical air conditioners will have no additional technology at all to keep the cost as low as possible.
  • Big brands like Panasonic and Daikin only maintain a series of cold 1-way mechanical air conditioners, while all types such as two-way, luxury, and high-end have built-in Inverter technology.
  • LG even stopped selling mechanical air conditioners, only cheap inverter air conditioners.
  • Thus, if you want to have these additional, high-end features, you must definitely choose to buy an inverter air conditioner.
  • In addition, due to the specific operating principle of the inverter during temperature adjustment, the inverter air conditioner will not turn off and restart the motor, which is the cause of the noise in the outdoor unit.
  • Thus, surely inverter air conditioner will operate quieter than mechanical air conditioner.
  • In addition, the majority of Inverter air conditioners belong to the higher-end product segment, which will have higher durability, better plastic quality and also more beautiful appearance.
  • Of course, the more expensive product must have more advantages, that is no doubt.

Are inverter air conditioners only advantages?

Choose inverter air conditioner or mechanical air conditioner?

  • The biggest problem with inverter air conditioners is that the cost is significantly higher than mechanical air conditioners.
  • Usually, this gap in big brands like Panasonic and Daikin is from 1.5 to 2 million VND for a product of the same capacity.
  • Now try to solve a small problem about the investment cost for inverter air conditioner and the amount of cost saved to see if the investment is worth it?
  • With a typical family, the time to use the air conditioner in a day is about 8 hours, and considered as a whole month, used for about 3 months of the year.
  • If you have the conditions to use the air conditioner more, you probably won't be too concerned about choosing a mechanical air conditioner or an inverter air conditioner.
  • So normally, each month you will have to pay about 400k for the air conditioner alone.
  • And if it is an inverter air conditioner, you will save from 40 to 50k / month. So with 3 months of use in a year, you save about 150k.
  • And so "only" 10 years, you have broken even the initial investment amount.
  • Assuming you can save 300k/year, you will need more than 5 years to balance the investment amount and the return.
  • You see, companies are always very clever so that you have to spend more money for additional values, not just air conditioners.
  • You've probably found the answer to your question as well.
  • Inverter air conditioners are more energy-efficient, quieter, more advanced, provide more comfortable experiences, integrate more additional technologies, are more durable, and of course are more expensive.
  • If you have abundant financial conditions, inverter air conditioner is an inevitable choice.
  • If you use the air conditioner a lot (such as an office) so that the break-even point comes in a short time, before the end of the product life, then the inverter air conditioner is the optimal choice.
  • And if you rarely use it, only turn it on occasionally, then a cheap mechanical air conditioner is the right choice for you.

If you are planning to equip your family with one or more air conditioners to use but are afraid of the cost.

Please contact us for support on installment purchase of air conditioner products directly from partner brands such as: LG, NAGAKAWA, DAIKIN, TOSHIBA, SHARP, CASPER, AQUA, ELECTROLUX, PANASONIC and SAMSUNG.