US 12,253,275 B2
Air conditioning system and control method and device thereof for controlling operation based on gas concentration of carbon dioxide and humidity
Si Li, Foshan (CN)
Assigned to GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD., Foshan (CN); and MIDEA GROUP CO., LTD., Foshan (CN)
Appl. No. 17/639,393
Filed by GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD., Foshan (CN); and MIDEA GROUP CO., LTD., Foshan (CN)
PCT Filed Sep. 29, 2019, PCT No. PCT/CN2019/109053
§ 371(c)(1), (2) Date Mar. 1, 2022,
PCT Pub. No. WO2021/042436, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 201910831233.9 (CN), filed on Sep. 4, 2019.
Prior Publication US 2022/0316743 A1, Oct. 6, 2022
Int. Cl. F24F 11/65 (2018.01); F24F 11/72 (2018.01); F24F 110/70 (2018.01)
CPC F24F 11/65 (2018.01) [F24F 11/72 (2018.01); F24F 2110/70 (2018.01)] 15 Claims
OG exemplary drawing
 
1. A control method for an air conditioning system comprising:
acquiring a gas concentration of indoor carbon dioxide;
determining an operation state of a fresh air mode according to the gas concentration;
acquiring an indoor humidity of an indoor environment and an outdoor humidity;
determining an operation state of a dehumidification mode according to the indoor humidity and the outdoor humidity; and
controlling the air conditioning system to operate according to at least one of the operation state of the fresh air mode or the operation state of the dehumidification mode, including:
controlling the air conditioning system to operate according to an on-state of the fresh air mode, including:
acquiring an indoor temperature of an indoor environment and an outlet temperature at an air outlet of a first heat exchanger of the air conditioning system, the first heat exchanger being connected in parallel to an indoor heat exchanger of the air conditioning system;
acquiring a first temperature difference value between the indoor temperature and the outlet temperature; and
controlling the air conditioning system to operate according to the first temperature difference value, including:
in response to determining that the first temperature difference value is greater than a first preset temperature difference value, controlling a compressor of the air conditioning system to increase an operation frequency; or
in response to determining that the first temperature difference value is less than the first preset temperature difference value, controlling the first heat exchanger to reduce a motor speed; or
controlling the air conditioning system to operate according to both the on-state of the fresh air mode and an on-state of the dehumidification mode, including:
acquiring an outlet temperature at an air outlet of the indoor heat exchanger of the air conditioning system and the outlet temperature at the air outlet of the first heat exchanger of the air conditioning system, the first heat exchanger being connected in parallel to the indoor heat exchanger;
acquiring a second temperature difference value between the outlet temperature at the air outlet of the indoor heat exchanger and the outlet temperature at the air outlet of the first heat exchanger; and
in response to determining that the second temperature difference value is less than a second preset temperature difference value, controlling the first heat exchanger to reduce the motor speed.