1959 developed the world's first two-stage compression air conditioner.
* 196 1 produced the first split air conditioner in the same industry.
* 1970 split air conditioner using rotary compressor was first introduced in the world.
* 1978 the most popular wireless remote control air conditioner in the same industry.
* 198 1 year, taking the lead in introducing ultra-thin (19.8cm) "Cold King" in the same industry.
* 1984 sells a two-speed inverter air conditioner with wireless remote control.
* 1990 telephone remote control air conditioner was first introduced in the same industry.
* 199 1 year successfully developed the world's first solar air conditioner.
* 1998, the DDN-X8 DC inverter compressor was first introduced in the same industry, and the human body sensing remote controller was developed, that is, the air conditioner moved with the wind;
* 1999 pioneered the production of fully automatic intelligent air conditioners in the world.
In 2002, the Internet remote control air conditioner was developed.
* In 2003, automatic descending filter, easy-to-clean air conditioner and ultraviolet light sensitive sterilization air conditioner were introduced.
* In 2004, a more perfect LED-UV sterilization technology was developed and applied to Sanyo inverter series air conditioners.
* In 2005, we produced and sold the Four Seasons Pavilion series air conditioners with automatic lifting panels.
* In 2006, CO2 sensor technology was developed to detect air cleanliness.
* In 2007, the second-generation Four Seasons Pavilion frequency conversion series air conditioner with brand-new respiratory system technology was introduced.