Heating detection circuit

The invention discloses a heating detection circuit, which comprises a first power supply circuit, a first selection circuit, a sampling circuit and a first number of heating elements, and the first number is an integer greater than or equal to 1; the first selection circuit is connected with the first number of heating elements and used for selecting one heating element to be connected with the first power supply circuit and the sampling circuit in series to form a detection loop, and the sampling circuit is used for outputting a detection signal to detect the impedance of the heating element in the detection loop. In this way, the number of elements in the heating detection circuit can be reduced. 本申请公开了一种加热检测电路，包括：第一电源电路、第一选择电路、取样电路和第一数量个加热元件，其中，第一数量为大于或等于1的整数；第一选择电路连接第一数量个加热元件，用于选择其中一个加热元件与第一电源电路和取样电路串联连接，形成检测回路，取样电路用于输出检测信号，以检测检测回路中的加热元件的阻抗。通过上述方式，本申请能够减少加热检测电路中的元件的数量。