1. The side air outlet saves a lot of space, but the air quality it provides is poor. 

2. The downwind design is simple and easy to manufacture, with good air supply performance, but it occupies a considerable amount of space. 

3. The degree of air flow distribution varies depending on whether the space of the air-conditioned room is restricted or not. 

4. The air conditioning system consists of a cold and heat source system and an air conditioning regulation system. The principle of liquid vaporization refrigeration is adopted to provide the required cooling capacity for the air conditioning regulation system, in order to offset the cooling load of the indoor environment; the heating system provides heat for the air conditioning regulation system to offset the heating load of the indoor environment.