1, Hitachi and Gree are Japanese and domestic, with good market sales and higher prices than Hitachi.
2. Technically, Hitachi Central Air Conditioning is good at patented compressor technology and variable frequency air conditioning technology, and the energy saving effect brought by these two pieces is also very obvious in the actual equipment use; However, the technology of Gree central air-conditioning in household central air-conditioning is slightly weak. There is no patented technology for the four major components of air conditioners, and they all rely on assembling the main accessories of other brands.
3. From the after-sales point of view, Gree withdrew its six-year long warranty, while Hitachi only had a three-year warranty period.
Air conditioning is air conditioning. Refers to the equipment that manually adjusts and controls the temperature, humidity, flow rate and other parameters of ambient air in buildings or structures. Generally, it includes cold source/heat source equipment, cold and hot medium transmission and distribution system, terminal device and other auxiliary equipment. It mainly includes refrigeration host, water pump, fan and pipeline system. The terminal equipment is responsible for carefully handling the air state by using the cold heat from transmission and distribution, so that the air parameters of the target environment can meet the requirements.
The original air conditioners and refrigerators used toxic gases such as ammonia and methyl chloride. The leakage of this gas will lead to a major accident. Thomas Midgley invented chlorofluorocarbon gas in 1928 and named it Freon. This refrigerant is much safer for human beings, but it is harmful to the atmospheric ozone layer. Freon is the trademark of CFC, HCFC or HFC refrigerants of DuPont, and the name of each refrigerant also includes a number to indicate the molecular composition of its components.