The invention belongs to the field of air conditioners, and specifically provides a control method of the air conditioner under
refrigeration conditions. Under the existing
refrigeration conditions, when the indoor temperature of the air conditioner reaches the user's habitual temperature, the indoor
humidity is quite different from the user's habitual
humidity. The control method of the present invention includes: acquiring the preset startup time of the air conditioner and the outdoor ambient temperature, Correct the preset startup time, determine the
air conditioning time, determine the advance startup time, obtain the actual indoor temperature T and actual
humidity RH, and calculate the indoor
dew point temperature T es , based on user
habit information, compare T and T s size, and RH vs. RH s size, based on comparison results and
dew point temperature T es , control the frequency of the compressor, the opening of the throttling device, and the
wind speed of the indoor fan, so that T p with T es fit. The present invention can control the degree of
refrigeration and the degree of dehumidification, so as to make T reach T s , RH has also reached RH s The standard also makes the early opening time more accurate.