Recommended air conditioning brands: Mitsubishi Heavy Industries, GREE, Midea, LG, Haier.

1. Mitsubishi Heavy Industries

The air-conditioning products sold by Mitsubishi Heavy Industries in China are generally equipped with compressors produced jointly by it and THACOM of Thailand. Although there are not many highlights, after all, the technology is mature and the quality is It is stable and reliable, provides a 6-year warranty, has good overall performance, and can meet the national first-level energy efficiency standards.

Mitsubishi Heavy Industries calls its full DC inverter technology "triple-core intelligent control". The triple chip linkage controls the compressor motor, internal and external machine motors and electronic expansion valve to ensure that the refrigerant supply and motor speed are coordinated with each other. , achieving precise speed and temperature control. In addition, Mitsubishi Heavy Industries has also mastered the PAM+PWM dual-mode frequency conversion technology pioneered by Hitachi, which takes into account rapid cooling heat and precise temperature regulation of ±0.5°C.

2. GREE Gree

Gree has continuously strengthened and improved its industrial structure to build a closed-loop industrial chain. The layout of the upstream industrial chain of air conditioners has gradually improved, and core components such as motors and compressors have been Forming a large scale, its subsidiary Lingda Compressor is a large supplier with an annual production capacity of up to 40 million units. Lingda mainly produces rotary compressors, which have been recognized by the market for their reliability. They are now almost standard equipment on Gree's home air-conditioning products.

Gree has applied automated manufacturing equipment on a large scale in recent years and improved the management of production lines. The internal workmanship of its products is almost on par with the industry benchmark Mitsubishi Electric. Through disassembly, it was found that even low-end fixed frequency products, Gree The copper tubes inside the machine are welded evenly and meticulously, with very few undesirable phenomena such as oxidation, blackening and peeling, effectively reducing the risk of refrigerant leakage. The dense areas of copper tubes are equipped with noise-reducing materials such as damping blocks and shock-absorbing cotton; The sheet metal parts have been bent and strengthened to improve the overall strength.

3. Midea Midea

Midea once attracted much attention in the air-conditioning market with its slogan of "one kilowatt hour per night". Although it was questioned due to factors such as the sealing of the test site, However, the energy efficiency value of its "Himalaya" model at that time was as high as 7.36. The performance of Midea air conditioners was "blowout" mainly because of the technical support of Japan's Toshiba. After incorporating Toshiba's split air conditioner business, Midea's Currently, it has the largest and most complete industrial chain in China's air-conditioning industry and is self-sufficient in core components.

Midea's three-level energy-efficiency fixed-frequency on-hook is mainly concentrated in the Zhiar, Power-Saving Star and other series, and the price is generally over 2,000 yuan, while the first-level energy-efficiency full DC variable-frequency on-hook series such as i Youth is priced at It's not expensive either, the price is stable at around 3,000 yuan, and the price/performance ratio is extremely outstanding.

4. LG

LG produced South Korea’s first air conditioner in 1968 and has a relatively rich technical accumulation in the field of air conditioning. It has started developing compressors since the 1970s. Research and development, currently has its own brand of high-end dual-rotor compressors, which perform well in terms of energy saving and quietness. LG is particularly confident in the reliability of its compressors and has launched a "10-year warranty" quality commitment.

In addition, LG, which started out in the electronics industry, has also successfully developed its own full DC inverter technology, which has been used in air-conditioning products for many years. The adjustment effect has been tested by the market, but full DC inverter requires full integration of components. and linkage control requirements are high. Compared with the first-tier Japanese brands that pursue the ultimate, LG's full DC inverter technology is slightly inferior in terms of response speed, adjustment accuracy and stability, and is mainly used in cabinet products. Equipped with lower level DC frequency conversion technology.

5. Haier

Through early cooperation with Mitsubishi Heavy Industries, Haier obtained part of the DC frequency conversion technology and actively applied it to household air-conditioning products, such as Yue+, Jinbo, Love +, Hera and other series.

Haier's DC frequency conversion technology is developed based on PMW. It has high adjustment accuracy, but its shortcomings are also obvious. The main ones are that the response time is long and the upper limit of adjustment is insufficient. As a result, there is still room for breakthrough in the maximum speed of the compressor. , compared to the high-end PWM+PAM dual-mode frequency conversion technology, it is slightly inferior. As for the full DC frequency conversion with higher adjustment accuracy, it has not yet become popular.