A household appliance, comprising: a carrier mountable at a plurality of different mounting positions (A1, A2, A3) provided in the household electrical appliance; a load mounted on the carrier; and a wireless power supply device adapted to supply power to the load mounted on the carrier, the wireless power supply device comprising: a plurality of transmitting coil assemblies, each transmitting coil assembly being mounted at a respective position of the plurality of different positions (A1, A2, A3) provided in the household appliance, each of the transmitting coil assemblies having a transmitting coil and a first magnetic core; a plurality of control switches, each control switch being provided at a respective position of the plurality of different positions (A1, A2, A3) in the household appliance, wherein each of the plurality of control switches is electrically coupled to a respective one of the plurality of transmitting coil assemblies and is constructed to control on/off of the transmitting coil of the respective transmitting coil assembly; and a single receiving coil assembly mounted on the carrier of the household appliance, the single receiving coil assembly having a single receiving coil and a single second magnetic core, wherein each control switch which is electrically coupled to the transmitting coil mounted at a respective position of the plurality of different positions (A1, A2, A3) is adapted to be switched off before the carrier is mounted at said position, thereby disconnecting said transmitting coil, and to switch to a closed state after the carrier is mounted at said position, thereby connecting said transmitting coil and such that the single receiving coil is electromagnetically coupled with the transmitting coil mounted at said position. a carrier mountable at a plurality of different mounting positions (A1, A2, A3) provided in the household electrical appliance; a load mounted on the carrier; and a wireless power supply device adapted to supply power to the load mounted on the carrier, the wireless power supply device comprising: a plurality of transmitting coil assemblies, each transmitting coil assembly being mounted at a respective position of the plurality of different positions (A1, A2, A3) provided in the household appliance, each of the transmitting coil assemblies having a transmitting coil and a first magnetic core; a plurality of control switches, each control switch being provided at a respective position of the plurality of different positions (A1, A2, A3) in the household appliance, wherein each of the plurality of control switches is electrically coupled to a respective one of the plurality of transmitting coil assemblies and is constructed to control on/off of the transmitting coil of the respective transmitting coil assembly; and a single receiving coil assembly mounted on the carrier of the household appliance, the single receiving coil assembly having a single receiving coil and a single second magnetic core, a plurality of transmitting coil assemblies, each transmitting coil assembly being mounted at a respective position of the plurality of different positions (A1, A2, A3) provided in the household appliance, each of the transmitting coil assemblies having a transmitting coil and a first magnetic core; a plurality of control switches, each control switch being provided at a respective position of the plurality of different positions (A1, A2, A3) in the household appliance, wherein each of the plurality of control switches is electrically coupled to a respective one of the plurality of transmitting coil assemblies and is constructed to control on/off of the transmitting coil of the respective transmitting coil assembly; and a single receiving coil assembly mounted on the carrier of the household appliance, the single receiving coil assembly having a single receiving coil and a single second magnetic core, wherein each control switch which is electrically coupled to the transmitting coil mounted at a respective position of the plurality of different positions (A1, A2, A3) is adapted to be switched off before the carrier is mounted at said position, thereby disconnecting said transmitting coil, and to switch to a closed state after the carrier is mounted at said position, thereby connecting said transmitting coil and such that the single receiving coil is electromagnetically coupled with the transmitting coil mounted at said position.