Molecular sieve style oxygen plants with external pipe connection

The utility model relates to a molecular sieve type oxygen generator for health care or first aid, particularly a housing, which is provided with an outer gas discharge pipe interface or a gas inlet pipe interface, of the molecular sieve type oxygen generator. The utility model comprises the housing provided with an air inlet, an oxygen outlet, and a nitrogen outlet, and an air filter, an air compressor, a cooling pipe, a left and a right molecular sieves, an oxygen tank, a left and a right valves, a pressure regulating valve, a bacterial filter, and a flow meter which are installed in the housing. The utility model is characterized in that the housing is respectively provided with outer pipe interfaces at the air inlet and the nitrogen outlet. The utility model leads inlet and discharged gases of the oxygen generator out of rooms, so that the problems that when the existing oxygen generator works, ambient air is polluted, the purity of generated oxygen is not high, etc. are solved.