Hitachi and Gree are Japanese and domestic, and their market sales are good. The price of Hitachi is relatively high! Comparing Hitachi and Gree central air conditioners, technically speaking, Hitachi central air conditioner is famous for its patented compressor technology and frequency conversion technology, and in the actual equipment use, the energy-saving effect brought by these two pieces is also very obvious; The technology of Gree central air-conditioning in household central air-conditioning is slightly weak. The four major components of air conditioner have no patented technology, and they all rely on assembling the main accessories of other brands! In terms of technology, Hitachi is absolutely dominant! Compared with the central air conditioners of Hitachi and Gree, from the after-sales point of view,
As far as Dan Cong's warranty period is concerned, Gree withdrew from the six-year super-long warranty period, while Hitachi only had a three-year warranty period. You will definitely think that Gree is better after sales, but after-sales service can't just look at the warranty period. Service quality and timeliness are the standards of after-sales service. Gree is procrastinating after sales, and generally feels that after sales are not good, while Hitachi's after-sales service is generally very good for 24 hours! Therefore, Hitachi's after-sales service is still better! Compared with Hitachi and Gree's central air conditioners, Gree's price is relatively cheap, but the low price is mainly due to its lack of technology!
Second, the comparison between Hitachi and Gree air conditioners
1 compressor.
The general development history of compressors can be roughly understood as the first-generation pendulum type ~ the second-generation rotor type (divided into single rotor and double rotor) ~ the third-generation scroll type (divided into low-pressure cavity scroll and high-pressure cavity scroll according to its evolution history), which is the key to determine the quality of a central air conditioner and the core structure of a household air conditioner. At present, most of the mid-range products of brands on the market use rotary compressors, and Daikin's high-end VRV uses high-and low-pressure scroll compressors (this name is too far-fetched). Hitachi VAMmini series adopts high-pressure scroll compressor (this is a patent of Hitachi), Mitsubishi Ling Rui series adopts low-pressure cavity scroll compressor, and Toshiba claims that all imported and domestic compressors are double-rotor compressors (a bit of a gimmick).
2. Look at the configuration.
Which brand is rich in configuration and high in technology.
For example, water pump, this product has been selected into the high-end series of major Japanese companies. Not bad, but expensive. In the case of Japanese standard float switch, the combination with water pump is a natural fit, which is very important for the later use of air conditioning.
3, look at the after-sales and origin.
Japanese products generally have fewer after-sales outlets in China than domestic machines. Because Hitachi's sales model is that the factory directly sets up stores, and there are more after-sales outlets than other Japanese brands.