The difference between variable frequency air conditioner and fixed frequency air conditioner _ inverter air conditioner and fixed frequency air conditioner which is good

China's grid voltage is 220 volts and 50 hertz. Air conditioners operating under these conditions are called fixed-frequency air conditioners. Because the frequency of power supply cannot be changed, the compressor speed of traditional fixed frequency air conditioners is basically constant, and the indoor temperature is adjusted by constantly turning on and off the compressor. The room temperature is likely to be hot and cold, and is consumed between on and off. More power.

The inverter air conditioner's mainframe is automatically variable speed, it can automatically provide the required amount of cold (heat) according to the room conditions; when the room temperature reaches the desired value, the air-falling host runs at a constant speed that can accurately maintain this temperature. To achieve "non-stop operation" to ensure the stability of the ambient temperature. The following highlights the advantages, purchase, installation and use of inverter air conditioners.

Frequency advantage

1, high comfort, precise temperature control, no "frustration", suitable for use in the bedroom / study

2, quiet, not fixed frequency 50HZ compressor low-frequency noise, no relay "click" noise

3, heating is too much than the fixed frequency

Frequency conversion defects

1, Xiaogui

2. Refrigeration is slightly slower than the fixed frequency (bedroom/study can ignore this)

Fixed frequency advantage

1, if used in the living room/dining room and only used for refrigeration, then the cost performance is higher than the frequency conversion

2, cooling slightly faster than frequency conversion

Fixed frequency defects

1, low comfort, compressor will start and stop frequently, temperature control is not accurate, not suitable for use in the bedroom / study

2, the noise is louder, the compressor has a 50HZ low frequency noise, there is a relay "click" noise

3, heating effect is not as good as frequency conversion

The biggest difference between frequency conversion and fixed frequency air conditioning is that the product has different operating principles on the compressor. The frequency conversion product compressor can moderately adjust the temperature when it is turned on for a long time. If the room does not need a lot of hot and cold, the air conditioner will operate at a low frequency, and the intelligent constant temperature control, while the fixed frequency product needs to be artificial. In the case of air-conditioning hot and cold switch machine adjustments.

1, different working principle

1, inverter air conditioner

Inverter air conditioner is a new type of air conditioner. Its working principle is a new technology that can change the entire frequency through the inverter and eventually change the speed of the air conditioner compressor. When the room temperature rises or falls rapidly, the indoor air conditioning load will increase, the compressor speed will increase, and the cooling capacity will increase proportionally. On the contrary, when the air conditioning load decreases, the compressor will turn to normal operation or deceleration.

2, fixed-frequency air conditioning

Fixed-frequency air conditioners are relatively traditional air conditioners. They are relatively technically time-consuming and relatively mature, so most households still use fixed-frequency air conditioners. The working principle of fixed frequency air conditioning is relatively simple. The compressor compresses the refrigerant with liquid refrigerant and then sends it to the outdoor unit. After the heat is dissipated, it becomes a liquid refrigerant with normal temperature and high pressure, and the heat is exchanged to the outdoors.

2, different characteristics

1, inverter air conditioner

Inverter air-conditioning energy-saving effect is relatively good, the compressor will not automatically open repeatedly, so that the compressor has a stable working condition, which can make the air-conditioning as a whole to achieve energy-saving effect of more than 30%. Temperature control is also more accurate, so that the human body feels very comfortable, not hot and cold. The temperature regulation speed is particularly fast. Once it is turned on, the room temperature can quickly rise or fall to the set temperature. The constant temperature effect is also very good, avoiding the uncomfortable feeling caused by the violent change of the room temperature. At the same time avoid frequent start and stop, so as to save more power.

However, the price of inverter air conditioners is about one third higher than that of ordinary air conditioners, and the system of inverter air conditioners is more complex and requires higher requirements for components. If failures occur, maintenance costs are relatively high.

2, fixed-frequency air conditioning

Fixed-frequency air conditioners are relatively mature in comparison with the morning market, and their products and types are also more abundant. Although technically more backward than the inverter air conditioner, it is more stable than the inverter air conditioner. Regardless of installation, after-sales or quality issues, users do not need to worry too much. Fixed-frequency air-conditioning prices are relatively moderate and cost-effective. Many users can accept it.

However, the temperature control of the fixed-frequency air conditioner is relatively unstable, which may cause the user to frequently stop and stop the air conditioning, resulting in an inability of the indoor temperature to be stable, and making the power consumption relatively large. From opening to set temperature, it takes a long time and people are less comfortable.

Compared to fixed-frequency air conditioners, inverter air conditioners have the following advantages:

1, energy saving

Through the change of compressor operating speed, when the room temperature is approximately constant, the air-conditioning cooling capacity is fixed, which not only saves power but also prolongs the service life of the air conditioner.

2, low noise

After the room temperature reaches a constant value, the vibration becomes smaller and the noise is reduced because the compressor operation rate becomes lower.

3, high temperature control accuracy

The air conditioner continues to work. The cold air produced in a unit of time is the same as the heat emitted by all objects in the room, and the room temperature can be kept at a relatively constant value.

However, fixed-frequency air-conditioning is not without merit, compared to inverter air-conditioning, its price will be relatively cheaper. And the inverter air-conditioning power saving is based on the premise of continuous use of air-conditioning for a long time. For example, in many parts of the North, there are communal facilities in the winter, and air-conditioning is used every year for three to four months. The rest of the time, air-conditioning is basically eating gray, and the advantage of frequency conversion is not obvious.

For example, if air conditioners are used for three months a year, 30 days a month, and an average of eight hours a day, the cooling run time is 960 hours, and the average air conditioner power is 2000W.

1. The total power consumption is 1920 degrees using a constant speed five-level air conditioner (EER=2.6).

2, if you use the current Shanghai standard 5 inverter air conditioner (EER = 3.3), the total power consumption of 1510 degrees

The power saving is about 410 degrees, and each unit saves only 150 yuan in electricity. However, the frequency conversion air conditioner on the market is generally more expensive than a fixed thousand yuan. When the use of electricity is saved for less than 1,000 yuan after 5 years, the product is now covered. In this way, the maintenance costs of air-conditioning will increase again.

Therefore, inverter air conditioner wants to save power, first, set the temperature to be reasonable, at about 26 degrees; Second, the boot time should be long enough, it is best not to shut down 24 hours.

From a comprehensive point of view, frequency conversion and power saving are positive, and frequency conversion has the advantages of low noise, high temperature control accuracy, and high temperature adjustment speed. Frequency conversion is a trend. Everyone can rationally consume and decide according to family room and budget.

The choice of air conditioner frequency or frequency conversion, which depends on your trial habits. If only the air conditioner is turned on and the room temperature is lowered to a comfortable temperature, and then shut down to sleep, then it is still selected frequency. Can save a lot of procurement costs and post-maintenance costs. If you are accustomed to keep your air conditioner switched on, you should choose the inverter.