Heat-reclamation multi-compressors

This invention is a heat recovery type multi-connected air conditioning unit. It includes a compressor, at least a outdoor heat exchanger, at least two indoor heat exchangers, several throttling devices and connecting pipeline. The said multi-connected unit also has four-way valves, with the same number as the said indoor and outdoor heat exchangers. The air inlet opening of four-way valve and air outlet opening of compressor are connected into a high pressure gas pipe together. One port of the said heat exchanger communicates to a frequently opened port of the said four-way valve. The other port of the said heat exchanger communicates to one port of the said throttling device. The other port of throttling device connected into a moderate pressure liquid pipe. The air absorbing opening of compressor and outlet opening of four-way valve are connected into a low pressure gas pipe. This invention forms a closed thermodynamic cycle loop. The heat recovery type multi-connected unit can refrigerate and heating at t