What is DC inverter air conditioner?

Question1:What does DC inverter air conditioner mean? Is it different from ordinary air conditioners? "Variable frequency air conditioner" adopts advanced technology, which can be started at low pressure and low temperature due to low voltage, which can improve the situation that air conditioners are difficult to start in some areas in winter due to unstable voltage or low indoor temperature. Because of the stepless speed change of the compressor, it can also meet the needs of refrigeration and heating in a larger area.

The so-called "variable frequency air conditioner" is a concept produced by comparing with the traditional "fixed frequency air conditioner". As we all know, the grid voltage in China is 220 volts and 50 hertz, and the air conditioner working under this condition is called "fixed frequency air conditioner". Because the power supply frequency can't be changed, the rotating speed of the compressor of the traditional fixed frequency air conditioner is basically unchanged. By constantly "starting and stopping" the compressor to adjust the indoor temperature, it is easy to cause the room temperature to be hot and cold between starting and stopping, which will consume more electricity. In contrast, the inverter of "variable frequency air conditioner" changes the power supply frequency of the compressor and adjusts the speed of the compressor. According to the compressor speed, the room temperature fluctuates little, consumes less electricity, and greatly improves the comfort. Frequency conversion air conditioner with frequency conversion control technology can automatically select heating, cooling and dehumidification operation modes according to the ambient temperature, so that the room can reach the required temperature quickly in a short time with low rotation speed and low energy consumption, and fluctuate with small temperature difference, thus achieving rapid, energy-saving and comfortable temperature control effect.

High power supply frequency, high compressor speed and large refrigeration (heat) capacity of air conditioner; When the power supply frequency is low, the cooling (heating) capacity of the air conditioner is small. This is the so-called "fixed frequency" principle. The core of inverter air conditioner is its inverter, which is a high-tech that came out in the 1980 s. It realizes the automatic adjustment of motor working frequency through current conversion, and changes the fixed grid frequency of 50Hz into frequency conversion of 30 to 130Hz, thus completing a new revolution of air conditioning. At the same time, the power supply voltage range reaches 142V to 270V, which completely solves the problem that the air conditioner cannot work normally due to the unstable power grid voltage. Every time the inverter air conditioner is used, it usually heats or cools the air conditioner with maximum power and air volume, and quickly approaches the set temperature. Because the inverter air conditioner improves the low-temperature heating capacity by increasing the working frequency of the compressor, the maximum heating capacity can reach 1.5 times that of the same brand and the same level air conditioner, and it can still maintain good heating effect at low temperature. In addition, the general split machine has only four speeds that can be adjusted, but when the indoor fan of the inverter air conditioner runs automatically, the speed will change within the range of 12 with the working frequency of the compressor. Because the rotation speed of the fan is reasonably matched with the capacity of the air conditioner, the quiet operation with low noise is realized. When the air conditioner runs at high power and quickly approaches the set temperature, the compressor will run at low speed and low energy consumption, and only use the required power to maintain the set temperature. This not only stabilizes the temperature, but also avoids the life attenuation caused by frequent start and stop of the compressor, greatly reduces the power consumption and realizes high efficiency and energy saving.

"Variable frequency air conditioner" adopts advanced technology, which can be started at low pressure and low temperature due to low voltage, which can improve the situation that air conditioners are difficult to start in some areas in winter due to unstable voltage or low indoor temperature. Because of the stepless speed change of the compressor, it can also meet the needs of refrigeration and heating in a larger area. However, the price of "variable frequency air conditioner" is usually about 1000 yuan higher than that of "fixed frequency air conditioner", so the following points should be paid attention to when purchasing "variable frequency air conditioner":

First of all, 48% DC frequency conversion energy saving is partial and comprehensive.

Experts from China Refrigeration Society pointed out that the bipolar polarity of direct current is fixed, and the current has only one direction, so there will be no alternation and no frequency at all. What about frequency conversion? At present, the so-called "DC frequency conversion air conditioner" advertised in the market is actually a DC speed regulation air conditioner, and the DC speed regulation technology adopted by it is far superior to the frequency modulation technology. However, in order to make full use of people's thinking mode, marketers put on the original inverter hat without thinking, so they made a joke.

According to reports, DC speed regulation only goes through a voltage conversion, so the energy loss is smaller than that of FM speed regulation.

In addition, because the rotor of this DC motor is a permanent magnet, it also saves the rotor current consumption of three-phase AC asynchronous motor, so its electrical efficiency from power supply to the motor is higher than that of frequency modulation speed regulation, saving some energy. However, some manufacturers exaggerate the energy saving of this internal regulation system as the energy saving of the whole machine, so there is a saying that energy saving is 48%. Experts say that energy saving mainly depends on the design of refrigeration system and ... & gt

Question 2: What is a semi-DC inverter air conditioner? Frequency conversion means that the compressor operates at a variable frequency, depending on the frequency operating range. The higher the better. DC depends on whether the motor inside the compressor is DC or AC. The running problem, low power consumption and long life of DC depend on its heart compressor, which is generally the best scroll compressor.

Question 3: What is a DC inverter air conditioner? What are its main features and functions? Simply put, inverter air conditioner is to add a frequency converter to the structure of traditional air conditioner. Compressor is the heart of air conditioning, and its speed directly affects the efficiency of air conditioning. Frequency converter is a control system used to control and adjust the speed of compressor, so that it is always in the best speed state, thus improving the energy efficiency ratio (20% ~ 30% more energy-saving than conventional air conditioners).

Inverter air conditioners have the following characteristics:

(1) the starting current is small, and the rotating speed is gradually accelerated. The starting current is1/7 of that of conventional air conditioners;

(2) There is no problem of hot and cold, because the inverter air conditioner runs at a low frequency, which gradually slows down as the temperature approaches the set temperature, gradually reaches the set temperature and keeps balance with the refrigeration loss, thus keeping the indoor temperature stable;

③ The noise is lower than that of the conventional air conditioner, because the inverter air conditioner uses a double-rotor compressor, which greatly reduces the rotational imbalance and makes the outdoor unit vibration very small, which is about1/2 of that of the conventional air conditioner;

④ The cooling and heating speed is 1 ~ 2 times faster than that of conventional air conditioners. Frequency conversion air conditioner adopts electronic expansion and throttling technology, and the microprocessor controls the opening of the valve according to the information collected by the temperature sensors at the inlet and outlet of the expansion valve and the suction pipe of the compressor, so as to achieve the purpose of rapid cooling and heating.

Advantages of inverter air conditioner:

(1) Energy saving: Because the inverter air conditioner can adjust the running speed of the compressor, the heart of the air conditioner, at any time through the built-in inverter, the energy can be used reasonably;

② Low noise: due to the balanced operation of the inverter air conditioner, the vibration and noise are reduced;

③ High temperature control accuracy: the refrigeration (heat) of the air conditioner can be controlled by changing the rotating speed of the compressor. The amount of refrigeration (heat) varies, for example, the refrigeration capacity of 36GW frequency conversion is 360-400W, and the heating capacity is 300-6800W, so the indoor temperature control can be accurate to 65438 0℃, which makes people feel very comfortable.

(4) Rapid temperature adjustment: when the room temperature is quite different from the set temperature, the inverter air conditioner will work at maximum power as soon as it is turned on, so that the room temperature will rise or fall to the set temperature quickly, and the cooling (heating) effect is obvious;

⑤ Low voltage requirements: inverter air conditioners have strong adaptability to voltage, and some inverter air conditioners can even be started at 150- 240V V;

⑤ Low ambient temperature requirements: Inverter air conditioners have strong adaptability to ambient temperature, and can even be started at the ambient temperature of 15t now;

① One-for-two intelligent temperature control: it can intelligently identify the room size and distribute the cooling (heating) amount, so that rooms of different sizes can keep the same temperature.

Question 4: What does 4:DC inverter air conditioner mean? The mistake upstairs is not to control the speed of the compressor with the DC voltage, but to control the frequency. The biggest difference between DC inverter air conditioner and ordinary air conditioner is that the motor in the compressor in ordinary air conditioner adopts AC motor, and the motor in inverter air conditioner adopts DC pulse motor. Changing the pulse frequency will also change the motor speed, while the motor speed of ordinary air conditioners is fixed and DC has no frequency. Can DC frequency be changed? This sentence is aimed at variable frequency motors. Turn DC on and off for a period of time to get the so-called frequency.

Question 5: What is a digital DC inverter air conditioner? What are the advantages of digital DC inverter air conditioner? The air conditioner should be digital DC, and the air conditioner compressor should be digital DC first.

This kind of high-tech compressor needs digital conversion circuit to replace the original AC conversion circuit, and can accurately control the rotation speed according to the change of environmental temperature, so that the compressor is always in the best operation state.

First of all, the unique advantage of high-efficiency digital DC inverter compressor is that it abandons the original circulating working mode of "AC voltage → DC voltage → AC voltage → variable speed AC motor" and adopts the advanced control technology of "AC voltage → DC voltage → variable speed digital motor", which reduces the number of current changes in work and greatly improves the efficiency of electric energy conversion.

Second, the fan of digital DC inverter air conditioner should adopt digital motor. Digital motor refers to the motor whose speed is very accurate controlled by digital pulse information. During the rotation and speed change of the motor, it can completely control the deceleration and acceleration, and ensure the smooth and quiet operation of the fan in the best way. At the same time, the AC noise caused by AC motor is avoided, and the running noise is greatly reduced.

Thirdly, digital processing sensors should be used. The sensor is a dialogue window between the ambient temperature and the air conditioning temperature control system. After digital processing, Haier's new Superman sensor can accept analog signals representing the real environment, convert them into digital signals, digitally process the signals, and accurately control the rotating speed of compressor and fan, so that the temperature control can be within 0.5℃. That is to say, if the ambient temperature changes slightly, the sensor will accurately transmit this change to the compressor and fan system for temperature adjustment, so that the indoor temperature is always in an approximately constant temperature state. Accurate temperature adjustment makes indoor comfort higher.

Fourth, digital air conditioning should really save energy. Haier International's advanced high-efficiency digital DC inverter compressor adopts V-type permanent magnet rotor, which has no magnetic loss and magnetization, so that the magnetic lines are concentrated, which greatly reduces the energy consumption in the conversion process, makes the compressor run more smoothly, quieter and more efficient, and saves electricity by 48% compared with ordinary air conditioners. The energy-saving effect of digital compressor is like a light bulb. Before digitization, if 30% of electric energy is used for lighting and 70% for heating, if digitization can be realized, then after digitization, 70% of electric energy is converted into light and 30% into heat energy, and its energy-saving effect is obvious.

Question 6: What is the difference between 6:DC inverter air conditioner and intelligent inverter air conditioner? The difference is that there are more functions, and the frequency conversion is DC frequency conversion, but we have made great efforts in intelligence.

Question 7: What is a full DC inverter air conditioner? What is DC inverter air conditioner? DC frequency conversion only the compressor is DC, and all motors are DC.

Question 8: What is the difference between DC frequency conversion and full DC frequency conversion of air conditioners? DC frequency conversion means that only the compressor is variable frequency, and full DC frequency conversion means that both the compressor and the indoor and outdoor fans are variable frequency.

Question 9: What does full DC inverter air conditioner mean? The unique advantage of high-efficiency digital DC inverter compressor is that it abandons the original circulating working mode of "AC voltage → DC voltage → AC voltage → variable speed AC motor" and adopts the advanced control technology of "AC voltage → DC voltage → variable speed digital motor", which reduces the number of current changes in work and greatly improves the efficiency of electric energy conversion. Secondly, the fan of digital DC inverter air conditioner should use digital motor. Digital motor refers to the motor whose speed is very accurate controlled by digital pulse information. During the rotation and speed change of the motor, it can completely control the deceleration and acceleration, and ensure the smooth and quiet operation of the fan in the best way. At the same time, the AC noise caused by AC motor is avoided, and the running noise is greatly reduced. Thirdly, digital processing sensors should be used. The sensor is a dialogue window between the ambient temperature and the air conditioning temperature control system. After digital processing, Haier's new Superman sensor can accept analog signals representing the real environment, convert them into digital signals, digitally process the signals, and accurately control the rotating speed of compressor and fan, so that the temperature control can be within 0.5℃. That is to say, if the ambient temperature changes slightly, the sensor will accurately transmit this change to the compressor and fan system for temperature adjustment, so that the indoor temperature is always in an approximately constant temperature state. Accurate temperature adjustment makes indoor comfort higher.

Question 10: How to distinguish DC inverter air conditioners from full DC inverter air conditioners 1? DC variable frequency air conditioner: DC variable frequency speed regulating compressor is adopted, and the fan motor is AC. Because the compressor is changed from AC to DC frequency converter, the energy-saving effect and the performance of the whole machine have been significantly improved, but the fan motor still uses AC motor, so there is still much room for improvement in the energy-saving level of the whole machine. It belongs to the second generation air conditioner.

2. Full DC inverter air conditioner means that the three core motors of air conditioner (inverter compressor motor, indoor fan motor and outdoor fan motor) all adopt high-power DC motors. All-DC inverter air conditioner has reached a nearly perfect state in energy saving level and overall performance. It belongs to the third generation air conditioner.