Blender

Abstract

A blender includes a blender body including an external cylinder, a grinding blade, and a blade driving portion rotating the grinding blade; an internal cylinder unit including an internal cylinder, disposed in the external cylinder, in which the grinding blade is disposed, and an internal cylinder driving portion rotating the internal cylinder; and a controller electrically connected to the blade driving portion and the internal cylinder driving portion to control the blade driving portion and the internal cylinder driving portion. The internal cylinder has an internal side surface on which a projection is formed such that blending objects, flowing rotationally while being ground by the grinding blade, are caught. A mixer according to the present invention comprises: a mixer main body provided with an outer container, pulverizing blades, and a blade driving unit for rotating the pulverizing blades; an inner container unit provided with an inner container, arranged inside the outer container, having the pulverizing blades located therein, and with an inner container driving unit for rotating the inner container; and a controller electrically connected to the blade driving unit and inner container driving unit to control both, wherein the inner container is provided with a protruding part on the inner side surface thereof so that the circularly moving foodstuff being mixed gets caught thereon while being pulverized by the pulverizing blades, and, in order to induce a state of imbalance in the foodstuff being mixed in the inner container, the controller controls the inner container driving unit to mix the foodstuff being mixed while repeating the patterns of reverse-rotating the inner container in the direction opposite to the rotational direction of the pulverizing blades and then stopping, or reverse-rotating and then changing the rotational velocity.