Supercharging, cooling and heating apparatus for buildings

The utility model relates to a building pressurization temperature-lowering heat supplier which belongs to the technical field of heat ventilation air conditioners. In order to enable the low-temperature hot-water ground radiation heat supply or temperature-lowering heat supply of insufficient heat source pressure outside a building room to normally work, a pressurization heat medium pump (2) and pressure reduction pipeline sections (10,13,14) are respectively connected between an indoor heat medium supply and return main pipe and a temperature-lowering heat supply system in series. Pressure reduction pipeline section inlets of a vertical pipe helpful for forming water flowing under a film flowing state are connected with the top end of a system public heat medium return vertical pipe (CNH1). The problem of insufficient heat source pressure outside the system is solved, the limited and closed work condition of the heat supply system is established, the normal work pressure of the heat supply system is maintai