Use and principle of inverter air conditioner and ordinary air conditioner

Use and principle of inverter air conditioner and ordinary air conditioner

Inverter air conditioners are based on ordinary air conditioners with special inverter compressors, and an inverter control system is added. Its basic structure and cooling principle are exactly the same as ordinary air conditioners. The main unit of the inverter air conditioner is automatically steplessly variable. It can automatically provide the required cold (heat) according to the room conditions; when the indoor temperature reaches the desired value, the air-conditioning main unit will run at a constant speed that can accurately maintain this temperature , To achieve "non-stop operation" to ensure the stability of the ambient temperature.

　　 Inverter air conditioner is an inverter added to the structure of conventional air conditioner. The compressor is the heart of the air conditioner, and its speed directly affects the efficiency of the air conditioner. The frequency converter is a control system used to control and adjust the speed of the compressor so that it is always in the best speed state, thereby improving the energy efficiency ratio (compared to the conventional Air-conditioning energy saving 20%-30%).

　　 1. Inverter air conditioners have the following characteristics

　　 The starting current is small, the speed is gradually increasing, and the starting current is 1/7 of the conventional air conditioner;

　　There is no hot and cold problem, because the inverter air conditioner gradually reduces the speed as the temperature approaches the set temperature, gradually reaches the set temperature and maintains a low-frequency operation that is balanced with the loss of cooling, so that the indoor temperature remains stable;

　　The noise is lower than that of conventional air conditioners, because the inverter air conditioners use dual-rotor compressors, which greatly reduces the unbalance of rotation and makes the vibration of the outdoor unit very small, about 1/2 of that of conventional air conditioners;

　　The cooling and heating speed is 1 to 2 times faster than conventional air conditioners. The inverter air conditioner adopts electronic expansion and throttling technology. The microprocessor can control the opening degree of the valve according to the information collected by temperature sensors installed at the inlet and outlet of the expansion valve and the suction pipe of the compressor to achieve rapid cooling and heating. purpose.

　　The working principle of inverter air conditioner

"Inverter" adopts more advanced technology. The voltage is small when starting, and it can be started under low voltage and low temperature conditions. This can be difficult to start in some areas due to unstable voltage or low indoor temperature in winter. Certain improvement effect. As the compressor realizes the stepless speed change, it can also adapt to a larger area of ​​cooling and heating requirements.

　　 The so-called "inverter air conditioner" is a concept generated by comparison with the traditional "fixed frequency air conditioner". As we all know, the voltage of my country's power grid is 220 volts and 50 Hz. Air conditioners working under this condition are called "fixed frequency air conditioners."

Since the power supply frequency cannot be changed, the compressor speed of the traditional fixed-frequency air conditioner is basically the same. It relies on the constant "on and off" compressor to adjust the indoor temperature. It is easy to cause the room temperature to become hot and cold between the on and off. And consume more power. In contrast, the "frequency conversion air conditioner" inverter changes the compressor power supply frequency and adjusts the compressor speed. Relying on the speed of the compressor to achieve the purpose of controlling the room temperature, the room temperature fluctuation is small, the power consumption is low, and the comfort is greatly improved. The inverter air conditioner using inverter control technology can automatically select the heating, cooling and dehumidifying operation modes according to the ambient temperature, so that the room can quickly reach the required temperature in a short time and with a small temperature difference under low speed and low energy consumption. Fluctuation achieves fast, energy-saving and comfortable temperature control effects.

　　 With high power supply frequency and fast compressor speed, the cooling (heating) capacity of the air conditioner is large; and when the power supply frequency is low, the cooling (heating) capacity of the air conditioner is small. This is the principle of the so-called "frequency conversion". The core of the inverter air conditioner is its frequency converter. The frequency converter is a high-tech that came out in the 1980s. It realizes the automatic adjustment of the motor operating frequency through the conversion of current, changing the 50Hz fixed grid frequency to 30 to 130Hz The changing frequency of the air conditioner has completed a new revolution. At the same time, the power supply voltage range is 142V to 270V, which completely solves the problem that the air conditioner cannot work normally due to the instability of the grid voltage.

　　 Each time the inverter air conditioner is used, it usually heats or cools with the maximum power and maximum air volume, and quickly approaches the set temperature. Because the inverter air conditioner increases the heating capacity at low temperatures by increasing the compressor's operating frequency, the maximum heating capacity can reach 1.5 times that of the same and the same level air conditioner, and it can still maintain a good heating effect at low temperatures. In addition, the general split machine only has four wind speeds for adjustment, but when the indoor fan of the inverter air conditioner is running automatically, the speed will vary within the 12 speed range with the working frequency of the compressor. The ability coordination is more reasonable, and quiet operation with low noise is realized. When the air conditioner is running at high power and quickly approaching the set temperature, the compressor will run at a low speed and low energy consumption, and only maintain the set temperature with the required power. This not only stabilizes the temperature, but also avoids the attenuation of the service life caused by the frequent start and stop of the compressor, and the power consumption is greatly reduced, realizing high efficiency and energy saving.

　　 The most power-consuming part of the air conditioner is the compressor. Compared with ordinary air conditioners, inverter air conditioners add a frequency converter that can be used to adjust the speed of the compressor.

　　 Inverter air conditioner inverter

　　 The operating speed of the inverter air conditioner compressor will slow down according to the decrease in the indoor temperature. The ordinary air conditioner compressor always runs at the maximum speed. Therefore, under certain circumstances, the inverter air conditioner saves electricity than the ordinary air conditioner. But why is it often not as energy efficient as the merchants say in actual use? That's because when the inverter air conditioner and the ordinary air conditioner are turned on, because the indoor temperature does not reach the set temperature, they all run at the maximum power. At this time, the inverter air conditioner has more complicated circuits than ordinary air conditioners. Power consumption (Inverter air conditioners who often use air conditioners will save a lot of electricity relatively). When the indoor temperature reaches the set temperature, the inverter air conditioner reduces the operating speed of the compressor through the inverter. Of course, the power consumption drops sharply. The ordinary air conditioner cannot adjust the speed of the compressor after the indoor temperature reaches the set temperature, so it must turn off the compressor. At this time, its power consumption is lower than that of an inverter air conditioner. However, when the compressor is started/stopped, it will generate an instantaneous current that is 3 to 7 times larger than that of the compressor in normal operation. Frequent start and stop will damage the life of the compressor.

　　The advantages of inverter air conditioners are: more precise temperature control, low noise, more comfortable human body feel, and long compressor service life

　　The advantage of ordinary air conditioners is that they are cheaper