Dehumidification mode control method and apparatus, device, medium, and program product

A dehumidification mode control method and apparatus, a device, a medium and a program product, implemented by means of: obtaining a dehumidification load of a heat pump system and an external ambient temperature when it is detected that a passenger compartment has a dehumidification demand; determining whether to enter a first dehumidification mode according to the dehumidification load, the external ambient temperature and a load threshold; if yes, then determining a control instruction of the first dehumidification mode according to an air temperature at multiple first preset positions in an air transmission heat exchange box and a subcooling degree of a heat exchange medium at at least one second preset position in a transmission pipeline; and then outputting the control instruction so that a first target temperature and a second target temperature simultaneously meet a preset requirement of a dehumidification function.