An operating assembly for a household appliance, the operating assembly comprising: a first operating portion; a second operating portion, wherein the first operating portion is at least partially disposed in the second operating portion, and wherein the second operating portion is capable of being located at a first position and a second position of the first operating portion, and capable of moving between the first position and the second position; and a coupling structure, the operating assembly being configured in such a manner that: when determining that the second operating portion is located at the first position, the second operating portion is rotatable relative to the first operating portion to generate a first electric signal; when determining that the second operating portion is located at the second position, the second operating portion is capable of, when being rotated and by means of the coupling structure, driving the first operating portion to rotate, generating a second electric signal during the rotation of the first operating portion; and the first operating portion is capable of being pressed to generate a third electric signal characterized in that the operating assembly further comprises a first contact member mounted on the first operating portion, and a second contact member mounted on the second operating portion, wherein when determining that the second operating portion is located at the first position, the first contact member is connected to the second contact member; when determining that the second operating portion is located at the first position and rotates, the first contact member and the second contact member rotate relative to each other to generate the first electric signal; when determining that the second operating portion is located at the second position, the first contact member is separated from the second contact member. a first operating portion; a second operating portion, wherein the first operating portion is at least partially disposed in the second operating portion, and wherein the second operating portion is capable of being located at a first position and a second position of the first operating portion, and capable of moving between the first position and the second position; and a coupling structure, the operating assembly being configured in such a manner that: when determining that the second operating portion is located at the first position, the second operating portion is rotatable relative to the first operating portion to generate a first electric signal; when determining that the second operating portion is located at the second position, the second operating portion is capable of, when being rotated and by means of the coupling structure, driving the first operating portion to rotate, generating a second electric signal during the rotation of the first operating portion; and the first operating portion is capable of being pressed to generate a third electric signal characterized in that the operating assembly further comprises a first contact member mounted on the first operating portion, and a second contact member mounted on the second operating portion, wherein when determining that the second operating portion is located at the first position, the first contact member is connected to the second contact member; when determining that the second operating portion is located at the first position and rotates, the first contact member and the second contact member rotate relative to each other to generate the first electric signal; when determining that the second operating portion is located at the second position, the first contact member is separated from the second contact member. when determining that the second operating portion is located at the first position, the second operating portion is rotatable relative to the first operating portion to generate a first electric signal; when determining that the second operating portion is located at the second position, the second operating portion is capable of, when being rotated and by means of the coupling structure, driving the first operating portion to rotate, generating a second electric signal during the rotation of the first operating portion; and the first operating portion is capable of being pressed to generate a third electric signal characterized in that the operating assembly further comprises a first contact member mounted on the first operating portion, and a second contact member mounted on the second operating portion, wherein when determining that the second operating portion is located at the first position, the first contact member is connected to the second contact member; when determining that the second operating portion is located at the first position and rotates, the first contact member and the second contact member rotate relative to each other to generate the first electric signal; when determining that the second operating portion is located at the second position, the first contact member is separated from the second contact member.