Sihai network

Difference between variable frequency air conditioner and constant frequency air conditioner

Sihaiwang: air conditioning is an unavailable tool in people's daily life. Hot summer can bring us cool, cold winter can bring us warm. However, at the beginning, only constant frequency air conditioning was used. Later, because of the addition of variable frequency air conditioning, the air conditioning became more energy-efficient and convenient. What's the difference between variable frequency air conditioning and constant frequency air conditioning? Let's see below.

What are the differences between variable frequency air conditioning and constant frequency air conditioning?

Difference in working principle

1. Constant frequency air conditioning

Constant frequency air conditioning is more traditional air conditioning, in technology for a long time, so the product will be more mature, so most of the air conditioning still uses constant frequency. The working principle of constant frequency air conditioning is relatively simple, that is to use the compressor to compress the liquid refrigerant, and then send it to the outdoor unit, after heat dissipation, it will become the liquid refrigerant of normal temperature and high pressure again, and bring the heat out of the outdoor by this way.

2. Variable frequency air conditioner

Variable frequency air conditioning is a new type of air conditioning. It is a new technology to change the speed of air conditioning compressor by adding a frequency converter to change the frequency of air conditioning. When the indoor temperature rises or falls rapidly, the indoor air conditioning load will increase, the compressor speed will increase, and the cooling capacity will increase. When the air conditioning load decreases, the compressor will run slower and the cooling capacity will decrease.

Differences in functional characteristics

Constant frequency air conditioning

The fixed frequency air conditioning is listed earlier, the air conditioning technology is more mature, and the products and types are also very rich. Technically, it is more backward than the variable frequency air conditioner, but its performance is more stable than the variable frequency air conditioner. Whether it's installation, after-sales or quality problems, users generally don't need to worry. And the price is relatively low, which is acceptable to many users.

But the temperature control of the constant frequency air conditioner is not stable, it will often switch on and off, resulting in the indoor temperature is not stable, and the power consumption is relatively large. It takes a long time from opening to setting the temperature, which makes the human body less comfortable.

Inverter air conditioner

The energy saving effect of the variable frequency air conditioner is good. The compressor will not turn on automatically and repeatedly, which can ensure the stable operation of the compressor, which can make the overall energy saving of the air conditioner more than 30%. Temperature control is more accurate, so that the human body feels very comfortable, not hot and cold. The regulating speed is very fast, and the room temperature can rise or fall to the regulating temperature rapidly after starting. The thermostatic effect is also very good, avoiding the discomfort caused by the drastic change of room temperature.

However, the price of variable-frequency air conditioning is about one third higher than that of ordinary air conditioning. Moreover, the system of variable-frequency air conditioning is complex and requires high components. In case of failure, the maintenance cost is relatively high.

At first, only constant frequency air conditioning was used. Later, because of the addition of variable frequency air conditioning, the air conditioning became more energy-efficient and convenient. What's the difference between variable frequency air conditioning and constant frequency air conditioning? Let's learn about it.

Advantages and disadvantages of variable frequency air conditioning and constant frequency air conditioning

Constant frequency air conditioning

Advantages: stable operation, can be used in various environments, and the price is relatively cheap.

Disadvantages:

1. It is easy to cause the constant frequency air-conditioning compressor to turn on and off frequently, resulting in a great change of indoor temperature.

2. Constant frequency air conditioning compressor frequent start and stop, and compressor frequent start will consume a lot of electricity, so it will be more power consumption.

3. It takes a long time to turn on the constant frequency air conditioner to reach the set temperature, and the comfort is not high.

Inverter air conditioner

Advantage:

1. The refrigeration is very fast, and the temperature in the room can be quickly increased or decreased after the machine is started.

2. Variable frequency air conditioning determines the power according to how much it needs, so it has high efficiency. No extra power consumption, power saving.

3. Accurate room temperature control: the temperature control is accurate and stable, and the change range of room temperature is within + 0.5 ℃.

Disadvantages:

1. The price is more expensive. Compared with ordinary constant speed air conditioner, the price is between 20% and 40% higher.

2. The control system and frequency conversion system of variable-frequency air conditioning are more complex, which requires higher components, and frequency conversion is more prone to failure than fixed frequency.