Abstract: A stirrer having programmable stirring mode control comprises a stirrer main body, an input interface, a controller and a frequency changer. The stirrer main body drives a stirring axle to rotate through a driving mechanism. The controller controls the frequency changer through a vector control circuit so as to control changeable frequency three-phase alternating current voltages or current of a three-phase induction motor. The controller executes stirring steps of multiple set of material items at an automatic mode. Predetermined parameters of the stirring step can be stored after updating, thereby forming the stirrer.

Abstract: A covering structure of a mixer includes: a fixed ring connected to the head of a mixer; an upper ring; and a lower ring. The fixed ring is further surrounded by a protruding ring. The upper ring has a striding part on its inner wall to stride on the protruding ring. The upper ring further has at least two stopping parts at an interval. A concave part is formed between each pair of consecutive stopping parts. One end of the lower ring is formed with connecting parts whose number is the same as that of the stopping parts. Its other end is connected downward with a covering element. The connecting parts of the lower ring are inserted via the concave parts on the upper ring and above them. By rotating the lower ring, the connecting parts urge against the stopping parts to form a rotating ring that can rotate along the protruding ring.

Abstract: A covering structure of a mixer includes: a fixed ring connected to the head of a mixer; an upper ring; and a lower ring. The fixed ring is further surrounded by a protruding ring. The upper ring has a striding part on its inner wall to stride on the protruding ring. The upper ring further has at least two stopping parts at an interval. A concave part is formed between each pair of consecutive stopping parts. One end of the lower ring is formed with connecting parts whose number is the same as that of the stopping parts. Its other end is connected downward with a covering element. The connecting parts of the lower ring are inserted via the concave parts on the upper ring and above them. By rotating the lower ring, the connecting parts urge against the stopping parts to form a rotating ring that can rotate along the protruding ring.

Abstract: A safety protective cover of a blender. The protective cover is associated with upper edge of a blending container. The bottom of the protective cover at least covers an upper opening of the blending container. The top side of the protective cover is formed with an opening at an axis of the rotary shaft. The opening linearly extends to a circumference of the protective cover to form a split. A water filling hole is formed on the protective cover. At least one latch section is disposed on the bottom of the protective cover for latching the protective cover with upper edge of the blending container.