The difference between inverter air conditioner and fixed frequency air conditioner

What is the difference between air conditioner frequency conversion and fixed frequency?

From the current home appliance market, home air conditioners are generally divided into fixed frequency and frequency conversion, before buying, we need to understand together, what is the inverter air conditioner, what is the fixed frequency air conditioner, the difference between frequency conversion and fixed frequency air conditioning are what ?

Fixed-frequency air conditioning: 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.

Inverter air conditioner: Inverter air conditioner host is automatically variable speed, it can automatically provide the required amount of cold (heat) according to the room; when the indoor temperature reaches the desired value, the empty and fall host can accurately maintain this temperature Constant speed operation, "non-stop operation" to ensure the stability of the ambient temperature.

The difference between air conditioner frequency conversion and fixed frequency:

In fact, the biggest difference between variable-frequency and fixed-frequency air conditioners is that the products have 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.

Compared with fixed-speed air-conditioning, inverter (variable) air-conditioning advantage of how much? To sum up, there are three major advantages:

(1) Comfortable comfort is reflected in the high stability at room temperature, fast cooling and heating, and low temperature heating capability.

1. Room temperature stability The high fixed speed air conditioner uses on/off to regulate the room temperature. The temperature control range is ±2°C, and the room temperature fluctuates widely. People will feel uncomfortable and easy to get “air conditioning disease”. The variable frequency (variable speed) air conditioner operates at a high speed at the beginning, when the room temperature reaches the set temperature, it turns to low frequency operation, the temperature control is precise, and the temperature control range is ±0.5°C. Because the room temperature is stable, people feel comfortable. It is especially suitable for the elderly and children when sleeping.

2. Fast cooling and heating speed (Variable speed) The air conditioner runs at maximum frequency after starting, and the frequency can reach above 130Hz. The cooling and heating capacity is 2 to 3 times that of the constant speed machine (50Hz), so that the cooling or heating rate of the room 1 to 2 times faster than a constant speed air conditioner. Make people quickly get a comfortable temperature environment.

3, low-temperature heating capacity in the winter, if the ambient temperature is very low, because the air-conditioning opportunities frequent defrost, the air-conditioning heating capacity will drop significantly. The frequency conversion (variable speed) air conditioner can increase the heating capacity by increasing the frequency during the non-defrost time, and on the other hand, it can use the high frequency operation to defrost during the defrosting time, so that the defrosting time is greatly reduced, so that the defrosting time is reduced. The change in room temperature at the time is reduced from about 6°C of the constant speed machine to about 2°C. Therefore, the comfort is greatly improved.

(2) Energy-efficient inverter (variable speed) air conditioner operates at maximum frequency after starting. When the room temperature reaches the set temperature, it turns to low frequency operation because the energy efficiency ratio is high at low frequency operation, compared with the constant speed machine. , can achieve substantial energy savings. According to comparative test data of a DC inverter (variable speed) machine with a capacity of 2800W for Mitsubishi Electric and a constant speed machine of the same capacity, the accumulated power consumption of the frequency conversion (speed) machine is 2 times that of the constant speed machine at 8 minutes. In about 40 minutes, the inverter (variable) machine and the constant speed machine cumulative power consumption is the same; 180 minutes (3 hours), the inverter (variable) machine's cumulative power consumption is only 56.4% of the speed machine. That is, at 3 hours, the cumulative power consumption of the inverter (variable speed) machine is 43.6% lower than that of the constant speed machine.

(3) Start-up current Small constant-speed air conditioner starts with large starting current, which will cause impact on the power grid and will also cause impact on other electrical appliances at home; the variable frequency (variable speed) air conditioner can select low frequency of 10Hz and its corresponding low voltage condition. Under starting, the starting current is very low, avoiding the impact on the power grid and the impact on the normal operation of other household appliances.