In 2014 four, air-conditioning valve domestic sales 82950000, grow 18.2% compared to the same period. Air conditioning is mainly used four way valve in the heating and cooling, the capacity of the market compared to the cut-off valve is smaller, the development of the industry is also influenced by the downstream demand effect. Four way valve in air conditioning field, the pattern of the market remained stable, three flowers and shield two large enterprises are still maintained a relatively clear market advantage, the total market share accounted for more than 80%, year-on-year decrease of 1.2 percentage points.