Multifunctional integrated cooling and heating device for building

The invention belongs to the field of heating and ventilating devices for buildings and particularly relates to a multifunctional integrated cooling and heating device for a building. The multifunctional integrated cooling and heating device comprises a heat pump air conditioning unit (1), an indoor heat radiating assembly (2) and an indoor unit (3), wherein the indoor heat radiating assembly (2) is connected in series with the indoor unit (3); a main liquid pipe transmission port of the heat pump air conditioning unit (1) is connected with a transmission port of the indoor unit (3); a refrigerant return steam pipe transmission port of the heat pump air conditioning unit (1) is connected with a transmission port of the indoor heat radiating assembly (2); a port of the indoor heat radiating assembly (2) is connected in parallel with a unit protecting element (4); and the heat pump air conditioning unit (1) adopts a heat pump unit, an air conditioning unit, a fixed-frequency unit, a variable-frequency unit or a