Temperature lowering and heating apparatus for building

The utility model relates to a temperature lowering and heating apparatus for buildings, which belongs to the technical field of a heating and ventilating air-conditioning. The utility model is additionally provided with a flow control component (3) of a heating pipeline, a by-pass pipe and control components (7, 8, 9) thereof between a refluxing and the heating pipelines, and a heat medium mixing pump (13) in the heating pipeline behind the by-pass pipe so as to provide a temperature lowering and heating mode on the load end of the utility model according to the partial users' requirements; a butterfly valve (14) behind the end section of a return path of a pump further enhances the regulating function of the temperature lowering and heating apparatus for building; a vertical pipe (21) having a pressure reducing function can make the utility model used for high-rise buildings to introduce the other successful technique. The utility model has the advantages of unique and reasonable conception, simple structure, easy production, reliable operation and convenient maintenance and uses a simple and regular device and structure to change the parameters of necessary heating heat media, and can flexibly satisfy the partial users' different requirements in the whole heat source heating system within a heating range.