Multifunctional full-direct-current power heat pump

The utility model discloses a multifunctional full direct current power heat pump which comprises an external box body, a heat exchange assembly and a dual-mode defrosting assembly, the heat exchange assembly is fixedly arranged on the inner side of the external box body, and the dual-mode defrosting assembly is fixedly arranged on the inner wall of the external box body. The utility model has the beneficial effects that the defrosting mode of heating the frosting position at regular time in the prior art is changed into the mode of starting the electromagnetic reversing valve by sensing the defrosting requirement through the defrosting sensor, and the heat medium in the heat medium exchange pipe connected between the heat pump indoor unit and the heat pump outdoor unit is guided into the heat conduction pipe; after the heating plate arranged on the inner wall of the external box body is heated to melt the combination portion of the ice layer and the external box body, the defrosting hammer is used for knocki