Abstract: A space recommendation method based on an air conditioning system includes: obtaining a user space usage request that includes demand information of a user for a space; and determining a current energy consumption amount of each of a plurality of air conditioning units of the air conditioning system. Each of the plurality of air conditioning units includes a plurality of air conditioning terminal devices, the plurality of air conditioning terminal devices is respectively arranged in a plurality of spaces; determining a candidate space based on the current energy consumption amount; and recommending an available space based on the demand information and the candidate space.

Abstract: A multi-unit air conditioning system includes an outdoor unit, a first indoor unit, a second indoor unit, a third indoor unit, and a mode conversion device. The outdoor unit includes an outdoor-unit controller and a selector. The first indoor unit includes a first indoor-unit controller. The second indoor unit includes a second indoor-unit controller. The selector is configured to send a first selection signal or a second selection signal. The outdoor-unit controller is configured to control the outdoor unit, the first indoor-unit controller and the second indoor-unit controller to operate under a first control mode according to the first selection signal. The outdoor-unit controller is configured to control the outdoor unit, the first indoor-unit controller and the second indoor-unit controller to operate under a second control mode according to the second selection signal.

Abstract: Disclosed is an air conditioner oil return control method, which includes the steps of: detecting that a power-on operation state of an outdoor unit at present meets a preset condition and a duration of the power-on operation state reaches a first preset duration, controlling the outdoor unit to perform an oil return operation, and setting the start-stop times as an initial value; after completing the oil return operation, detecting whether a start-stop operation occurs in the outdoor unit; updating the start-stop times when the start-stop operation occurs in the outdoor unit; and when updated start-stop times reach a preset number and the outdoor unit is in a starting operation state at present, controlling the outdoor unit to perform the oil return operation. Also disclosed are an air conditioner and a computer readable storage medium.

Abstract: A controlling method of a multi-unit air conditioning system in the present disclosure includes: S1: sending a first selection signal, or a second selection signal; S2: controlling the multi-unit air conditioning system to operate under a first control mode according to the first selection signal; S3: controlling the multi-unit air conditioning system to operate under a second control mode according to the second selection signal; S4: receiving a mode-on signal; S5: determining whether a second operating mode is the same as the first operating mode, if no, entering step S6; S6: turning on an indoor-unit fan of the first indoor unit and sending a mode conversion signal to the outdoor-unit controller; S8: converting an operating mode of the outdoor unit; S9: controlling the first indoor unit to operate under the first operating mode; S10: controlling operation of the second indoor unit according to the parameters of the first operating mode.