Host circuit of wireless alarm system of refrigeration equipment

The utility model relates to the technical field of refrigeration equipment, and especially relates to a host circuit of a wireless alarm system of refrigeration equipment. The host circuit includes a microcontroller, a receiving circuit for demodulating and recovering coded data, a decoding circuit, and an acousto-optic alarm circuit. The receiving circuit is connected with the decoding circuit. The decoding circuit is connected with the microcontroller. The acousto-optic alarm circuit is connected with the microcontroller. The microcontroller is also connected to a unit nixie tube through a shift register. Workers can know the types of faults and numbers of extension sets through indication of different indicating lamps and nixie tubes so as to handle problems in a highly efficient and timely manner after finding sources of the faults. The host circuit is simple in structure, enables alarming to be realized in a highly efficient and visual manner, and is highly practical.