Air conditioner and AHU unit temperature control method

The invention discloses an air conditioner and an AHU unit temperature control method. The air conditioner comprises a compressor, a three-pipe heat recovery external unit and an AHU unit, and the AHU unit comprises a plurality of sets of refrigerating coils connected in parallel and a plurality of sets of heating coils connected in parallel, and a liquid pipe of each refrigerating coil is provided with a refrigerating electronic expansion valve; gas pipes of the refrigerating coils are connected with a low-temperature and low-pressure gas pipeline, a liquid pipe of each heating coil is provided with a heating electronic expansion valve, and gas pipes of the heating coils are connected with a high-temperature and high-pressure gas pipeline through a first electromagnetic valve; the gas pipes of the heating coils are connected with the low-temperature and low-pressure gas pipeline through a second electromagnetic valve; a controller is configured to obtain indoor environment information and user setting inform