Sihai network

What is the power saving principle of variable frequency air conditioning

The arrival of summer makes people prefer to stay in the house. The long-term stay in the air-conditioned room is necessary to consider the power consumption or not. It is said on the Internet that frequency conversion air conditioning saves electricity compared with constant frequency air conditioning. Is it true? What is the power saving principle of variable frequency air conditioning? How can we choose the right air conditioner in summer? Let's find out.

Does frequency conversion air conditioning save electricity compared with fixed frequency

In principle, variable frequency air conditioning is more energy-saving than constant frequency air conditioning. But in fact, it may not be so, because when using air conditioner, we need to consider the time of using air conditioner. How to use air conditioner for a short time every day and turn it off after only a few hours of operation? In this way, the variable frequency air conditioner can not save much electricity, but its price is more expensive, and it is also very expensive after sale. Moreover, the failure probability of variable frequency air conditioner is greater than that of constant frequency air conditioner. This short time makes it possible to With air conditioning, it's better to buy a fixed frequency.

The reason of power saving of variable frequency air conditioning

1. The starting current of the constant frequency air conditioner is several times of the rated current, and the constant frequency air conditioner often turns on and off when it works, which is very power consuming.

2. The heating capacity of constant frequency air conditioner in winter is generally not enough, so it will be equipped with electric auxiliary heating elements, and the energy efficiency ratio is relatively low, generally no more than 2. Generally, the electric auxiliary heating power of household split air conditioner is 1-2kw, so it is very expensive in winter.

3. The start-up of variable frequency air conditioner is soft start, there is no impulse current, and there is no waste of electricity.

4. The variable frequency air conditioner is operated at high frequency to cool down. When the room temperature drops to the set temperature of the air conditioner, the air conditioner will automatically operate at low frequency, so as to maintain the indoor temperature and the compressor will not shut down. The power consumption of continuous low-frequency operation is only one third of the rated power, some may only be one quarter, and the same is true for heating.

5. The frequency conversion air conditioner generally does not need the electric auxiliary heating element, and will not consume more electricity than the constant frequency air conditioner when heating in winter.

Everyone said that frequency conversion air conditioning is more energy-saving than constant frequency air conditioning. Is this true? Why frequency conversion air conditioning is more energy-saving than constant frequency air conditioning?

Comparison between variable frequency air conditioning and constant frequency air conditioning

1. Compressor operation mode

Constant frequency air conditioner: its power supply frequency is constant. If we set a temperature, the compressor will stop working when the indoor temperature reaches the set temperature. If the temperature is high or lower than a certain temperature, the compressor will restart or shut down.

Variable frequency air conditioning: when the set temperature is reached, the compressor does not shut down to work, but works at a lower frequency, so as to maintain the indoor temperature. It is also a kind of protection for the compressor without frequent opening or closing, and it saves power.

2, price

The price of fixed frequency air conditioner is more affordable and covers all brands. There are many choices.

Compared with the same brand of constant frequency air conditioner, the variable frequency air conditioner costs 1000 to 2000 yuan, and the price is relatively high.

3, save electricity.

In theory, the variable frequency air conditioner is cheaper than the fixed frequency air conditioner. Just like the computer and TV can't be turned off and restarted soon, so can the air conditioner. The compressor often switches on and off, which also consumes a lot of electricity.

Although the compressor of the variable frequency air conditioner is always on, it has a relatively intelligent constant temperature, and the indoor temperature will be relatively balanced without any fluctuation. The human body will feel more comfortable.

4. Usage habits

As for what air conditioner to choose, first of all, we should not look at saving electricity or cost. We should look at our own habits. It's not to say that the variable frequency air conditioner is very energy-saving, because it is always on the compressor to maintain the temperature. If the air conditioner is only on for one or two hours, then there is not much difference between using the fixed frequency air conditioner and using it.