Abstract: A bean grinder having a bean grinding chamber part, a dynamic grinding wheel, a static grinding wheel, and a residue removing plate. The bean grinding chamber part comprises a bean grinding chamber and a powder discharge channel. An inner wall of the bean grinding chamber is provided with a planar first inner wall disposed close to a powder discharge port and located at a rear side of the powder discharge port in a rotation direction of the dynamic grinding wheel. The first inner wall is tangent to a circle of the inner wall of the bean grinding chamber. An inner wall of the powder discharge channel comprises a second inner wall located at the side of the powder discharge port provided with the first inner wall, and the second inner wall is inclined outwards at a given angle ? with respect to the first inner wall.

Abstract: Provided is a coffee maker, comprising a shell body, a brewing assembly, a slight pressure assembly, a heating assembly and a filtering assembly; the brewing assembly comprises a brewing vessel installed on the shell body; the brewing vessel has a hollow accommodation chamber, which accommodates stuff to be brewed; the slight pressure assembly comprises a booster pump and a pressure pipe; the booster pump is connected with the pressure pipe; the pressure pipe is in communication with the accommodation chamber; the booster pump is configured to supply slight pressure to the brewing vessel; the heating assembly is in communication with the accommodation chamber assembly, and is configured to supply heated water to the brewing vessel; and the filtering assembly is provided on a lower part of the brewing vessel and is in communication with the accommodation chamber. A control method of the coffee maker is further provided.

Abstract: A bean grinder having a bean grinding chamber part, a dynamic grinding wheel, a static grinding wheel, and a residue removing plate. The bean grinding chamber part comprises a bean grinding chamber and a powder discharge channel. An inner wall of the bean grinding chamber is provided with a planar first inner wall disposed close to a powder discharge port and located at a rear side of the powder discharge port in a rotation direction of the dynamic grinding wheel. The first inner wall is tangent to a circle of the inner wall of the bean grinding chamber. An inner wall of the powder discharge channel comprises a second inner wall located at the side of the powder discharge port provided with the first inner wall, and the second inner wall is inclined outwards at a given angle a with respect to the first inner wall.