Air conditioner and control method thereof

An air conditioner, comprising:

• an outdoor unit including a compressor configured to compress a refrigerant;
• an indoor unit including an indoor fan configured to supply air indoors;
• a temperature sensor configured to detect a first indoor temperature and a second indoor temperature;
• a humidity sensor configured to detect a first indoor humidity and a second indoor humidity;
• and
• a controller configured to:
• obtain the first indoor temperature and a first target temperature at a first moment;
• control the air conditioner to operate in a reheat dehumidification mode if determining that a first preset condition is satisfied;
• wherein the reheat dehumidification mode refers to a mode that the air conditioner heats dehumidified cold air before sending the dehumidified cold air indoors;
• and
• control the air conditioner to operate in a cooling mode if determining that the first preset condition is not satisfied;
• the controller being further configured to:
• after controlling the air conditioner to operate in the reheat dehumidification mode, obtain the second indoor temperature and a second target temperature at a second moment;
• and
• control the air conditioner to enter a shutdown state if determining that one of a second preset condition and a third preset condition is satisfied;
• wherein the first preset condition includes that the first indoor temperature is less than or equal to a sum of the first target temperature and a first preset temperature, and the first indoor temperature is greater than the first target temperature;
• the second preset condition includes that the second indoor temperature is outside a temperature range, an upper limit value of the temperature range is equal to a sum of the second target temperature and a second preset temperature, and a lower limit value of the temperature range is equal to a difference between the second target temperature and the second preset temperature;
• and
• the third preset condition includes that the second indoor temperature is within the temperature range, and the second indoor humidity is less than or equal to a difference between a second target humidity and a first preset humidity.

A control method of an air conditioner, wherein

• the air conditioner includes:
• an outdoor unit including a compressor configured to compress a refrigerant;
• an indoor unit including an indoor fan configured to supply air indoors;
• a temperature sensor configured to detect a first indoor temperature and a second indoor temperature:
• a humidity sensor configured to detect a first indoor humidity and a second indoor humidity;
• and
• a controller coupled to the compressor, the indoor fan, the temperature sensor, and the humidity sensor;
• the control method comprises:
• obtaining the first indoor temperature and a first target temperature at a first moment;
• controlling the air conditioner to operate in a reheat dehumidification mode if determining that a first preset condition is satisfied;
• wherein the reheat dehumidification mode refers to a mode that the air conditioner heats dehumidified cold air before sending the dehumidified cold air indoors;
• and
• controlling the air conditioner to operate in a cooling mode if determining that the first preset condition is not satisfied;
• wherein the first preset condition includes that the first indoor temperature is less than or equal to a sum of the first target temperature and a first preset temperature, and the first indoor temperature is greater than the first target temperature;
• the control method further comprises:
• after controlling the air conditioner to operate in the reheat dehumidification mode if determining that a first preset condition is satisfied, obtaining a target temperature and a target humidity in a current cycle;
• determining a target evaporation temperature in the reheat dehumidification mode according to the target temperature and the target humidity in the current cycle;
• wherein the target evaporation temperature is a temperature that the indoor heat exchanger as an evaporator needs to reach;
• and
• adjusting a rotational speed of the compressor according to the target evaporation temperature.