Abstract: An air conditioning system includes a storage medium and an air conditioning system, for a three-pipe air conditioning system, the three-pipe air conditioning system includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, a gas-liquid separator, a first pipeline, a second pipeline and a third pipeline; the oil return control method comprises the following steps: controlling the compressor to operate at a first frequency in a refrigerating mode; judging whether the operation duration of the refrigerating mode reaches a first preset time or not; if so, the air conditioning system enters an oil return state, and the compressor, the third pipeline, the second pipeline and the gas-liquid separator are controlled to be communicated in sequence to form a refrigerant circulation loop.

Abstract: An air conditioning system and a defrosting control method and device thereof including: obtaining defrosting exit time determined in previous defrosting, and controlling the air conditioning system to perform this defrosting according to the defrosting exit time determined in the previous defrosting; in this defrosting process of the air conditioning system, obtaining the temperature of an outdoor environment, and obtaining the temperature of an outlet of an outdoor heat exchanger; determining the temperature of the outdoor environment and the temperature of the outlet of the outdoor heat exchanger; and if the temperature of the outlet of the outdoor heat exchanger is lower than a first preset temperature and lasts a preset time and the temperature of the outdoor environment is lower than a second preset temperature, obtaining forced defrosting time serving as the defrosting exit time of the next defrosting of the air conditioning system, and storing the time.

Abstract: A temperature-sensing bulb support for an air-conditioner indoor unit, and an air-conditioner indoor unit are disclosed. The temperature-sensing bulb support includes: a support body. The support body is adapted to be fixed to a housing of the air-conditioner indoor unit. The support body defines a filter mesh positioning groove configured to accommodate an end frame bar of a filter mesh, and the support body further defines a temperature-sensing bulb accommodating groove configured to accommodate a temperature-sensing bulb. The temperature-sensing bulb accommodating groove is isolated from the filter mesh positioning groove by a partition wall, and the temperature-sensing bulb accommodating groove is located outside the filter mesh positioning groove.

Abstract: A new fan and an anti-cold air control method and apparatus therefor, the method comprising the following steps: during the process of a new fan switching from a heating mode to a cooling mode, acquiring in real time the set temperature and air supply temperature of the new fan and the middle-portion temperature of the indoor heat exchanger of the new fan (S1); acquiring the current output wind speed and the set wind speed of the new fan (S2); and adjusting the output wind speed of the new fan on the basis of the set temperature, the air supply temperature, the middle-portion temperature of the indoor heat exchanger, the current output wind speed, and the set wind speed (S3).

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 are an air conditioning system and its pressure ratio control method and device. The method includes: acquiring an actual pressure ratio of the compressor every preset time period in operation of the air conditioning system; judging whether the actual pressure ratio is greater than or equal to the first pressure ratio corresponding to a current level; controlling the compressor to downshift one level for operation if the actual pressure ratio is greater than or equal to the first pressure ratio corresponding to the current level; further judging whether the actual pressure ratio is less than the second pressure ratio corresponding to the current level if the actual pressure ratio is less than the first pressure ratio corresponding to the current level; and controlling the compressor to upshift one level for operation if the actual pressure ratio is less than the second pressure ratio corresponding to the current level.

Abstract: A method for controlling a multi-split air conditioner. The method includes detecting whether the degree of superheat of each outdoor unit meets a target requirement, if yes, determining whether a difference between an average exhaust temperature of each outdoor unit and an average exhaust temperature of an outdoor unit system reaches a preset value, if yes, comparing the size of the average exhaust temperature of each outdoor unit with the size of the average exhaust temperature of the outdoor unit system, according to the result between the size of the average exhaust temperature of each outdoor unit and the size of the average exhaust temperature of the outdoor unit system, controlling an electronic expansion valve to actuate to make the average exhaust temperature of each outdoor unit to approximate to the average exhaust temperature of the outdoor unit system.

Abstract: The present disclosure provides a method for controlling a fresh air machine. The method for controlling the fresh air machine of an air-conditioner includes: determining whether a fault occurs in a return air temperature sensor of the fresh air machine when the fresh air machine operates normally; closing an internal valve corresponding to the fresh air machine and keeping a fan motor operating, when the fault occurs in the return air temperature sensor; determining whether a fault occurs in an delivery air temperature sensor of the fresh air machine; when the fault does not occur in the delivery air temperature sensor of the fresh air machine, obtaining an delivery air temperature of the fresh air machine and controlling the fresh air machine to operate again by using the obtained delivery air temperature as a new return air temperature. The present disclosure also provides a fresh air machine.

Abstract: A method for controlling a multi-split air conditioner. The method comprising the steps of: step S10, detecting whether the degree of superheat of each outdoor unit meets a target requirement; step S20, if yes, determining whether a difference between an average exhaust temperature of each outdoor unit and an average exhaust temperature of an outdoor unit system reaches a preset value; step S30, if yes, comparing the size of the average exhaust temperature of each outdoor unit with the size of the average exhaust temperature of the outdoor unit system; and step S40, according to the result between the size of the average exhaust temperature of each outdoor unit and the size of the average exhaust temperature of the outdoor unit system, controlling an electronic expansion valve to actuate to make the average exhaust temperature of each outdoor unit to approximate to the average exhaust temperature of the outdoor unit system.

Abstract: The present disclosure provides an air conditioner system and a control method for the same. The air conditioner system includes: a refrigeration system. A first port of a second four-way valve is connected to a pipeline between the first four-way valve and the indoor heat exchanger, and a second port of a second four-way valve is connected to a first position in a pipeline between the indoor heat exchanger and the outdoor heat exchanger. A first port of the first passage of an auxiliary heat exchanger is in communication with a fourth port of the second four-way valve, and a second port of the first passage is connected to a second position in a pipeline between the indoor heat exchanger and the outdoor heat exchanger.

Abstract: It is provided a cold-air-avoidance control method and apparatus of an indoor unit of a multi-split air conditioning system, the multi-split air conditioning system includes an outdoor unit and a plurality of indoor units, and the cold-air-avoidance control method includes: obtaining a saturation temperature corresponding to a high pressure of the outdoor unit; obtaining an entrance temperature and a return air temperature of a heat exchanger of each heating indoor unit, and controlling an operating status of the heating indoor unit according to the saturation temperature, the entrance temperature and the return air temperature. With the method according to the present disclosure, reliability and accuracy of controlling the heating indoor unit can be improved, such that the effect of the cold-air-avoidance control is improved, and a more comfortable heating process is provided.

Abstract: Disclosed are an oil return control method and device of an air conditioning system, a storage medium and an air conditioning system, wherein the oil return control method is used for a three-pipe air conditioning system, and the three-pipe air conditioning system comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, a gas-liquid separator, a first pipeline, a second pipeline and a third pipeline; the oil return control method comprises the following steps: controlling the compressor to operate at a first frequency in a refrigerating mode; judging whether the operation duration of the refrigerating mode reaches a first preset time or not; if so, the air conditioning system enters an oil return state, and the compressor, the third pipeline, the second pipeline and the gas-liquid separator are controlled to be communicated in sequence to form a refrigerant circulation loop.

Abstract: Disclosed are an air conditioning system and its pressure ratio control method and device. The method includes acquiring an actual pressure ratio of the compressor every preset time period in operation of the air conditioning system; judging whether the actual pressure ratio is greater than or equal to the first pressure ratio corresponding to a current level; controlling the compressor to downshift one level for operation if the actual pressure ratio is greater than or equal to the first pressure ratio corresponding to the current level; further judging whether the actual pressure ratio is less than the second pressure ratio corresponding to the current level if the actual pressure ratio is less than the first pressure ratio corresponding to the current level; and controlling the compressor to upshift one level for operation if the actual pressure ratio is less than the second pressure ratio corresponding to the current level.

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: An air conditioning system and a defrosting control method and device thereof including: obtaining defrosting exit time determined in previous defrosting, and controlling the air conditioning system to perform this defrosting according to the defrosting exit time determined in the previous defrosting; in this defrosting process of the air conditioning system, obtaining the temperature of an outdoor environment, and obtaining the temperature of an outlet of an outdoor heat exchanger; determining the temperature of the outdoor environment and the temperature of the outlet of the outdoor heat exchanger; and if the temperature of the outlet of the outdoor heat exchanger is lower than a first preset temperature and lasts a preset time and the temperature of the outdoor environment is lower than a second preset temperature, obtaining forced defrosting time serving as the defrosting exit time of the next defrosting of the air conditioning system, and storing the time.

Abstract: A method for controlling a multi-split air conditioner. The method comprises: detecting whether the degree of superheat of an outdoor unit meets a target requirement, if yes, determining whether a difference value between an average exhaust temperature of the outdoor unit and the average exhaust temperature of an outdoor unit system reaches a preset value, if yes, comparing the average exhaust temperature of the outdoor unit with the average exhaust temperature of the outdoor unit system, reducing operating frequency of a compressor of the outdoor unit if the average exhaust temperature of the outdoor unit is greater than the average exhaust temperature of the outdoor unit system; and increasing the operating frequency of the compressor of the outdoor unit if the average exhaust temperature of the outdoor unit is less than the average exhaust temperature of the outdoor unit system.

Abstract: A method for controlling an air conditioner, wherein an indoor environment temperature is detected by an indoor temperature sensor, and the control method comprises the following steps: during the operation of an air conditioner, if it is determined that an indoor temperature sensor has a fault, controlling the air conditioner such that same sends indoor temperature sensor failure alarm information, and determining whether an indoor machine of the air conditioner is connected to a control terminal (S1); if the indoor machine is connected to only one control terminal, acquiring a current indoor environment temperature by the control terminal (S2); and using the current indoor environment temperature acquired by the control terminal as a control parameter to control the air conditioner so as to keep the air conditioner operating continuously (S3).

Abstract: A control apparatus for a fresh air blower, the apparatus comprising an air blower module and an air blower module radiator arranged corresponding to the air blower module. Further disclosed is a control method for a fresh air blower, the method comprising the following steps: (S1) acquiring a current operation mode of a fresh air blower and determining whether the current operation mode is a refrigeration mode or an air supply mode; (S2) if the current operation mode is the refrigeration mode or the air supply mode, further determining whether there is condensation in an air blower module radiator; and (S3) if there is condensation in the air blower module radiator, adjusting an air gear of the fresh air blower or a target superheating degree of the fresh air blower according to the current operation mode so as to eliminate the condensation on the air blower module radiator.

Abstract: A temperature-sensing bulb support for an air-conditioner indoor unit, and an air-conditioner indoor unit are disclosed. The temperature-sensing bulb support includes: a support body. The support body is adapted to be fixed to a housing of the air-conditioner indoor unit. The support body defines a filter mesh positioning groove configured to accommodate an end frame bar of a filter mesh, and the support body further defines a temperature-sensing bulb accommodating groove configured to accommodate a temperature-sensing bulb. The temperature-sensing bulb accommodating groove is isolated from the filter mesh positioning groove by a partition wall, and the temperature-sensing bulb accommodating groove is located outside the filter mesh positioning groove.

Abstract: A new fan and an anti-cold air control method and apparatus therefor, the method comprising the following steps: during the process of a new fan switching from a heating mode to a cooling mode, acquiring in real time the set temperature and air supply temperature of the new fan and the middle-portion temperature of the indoor heat exchanger of the new fan (S1); acquiring the current output wind speed and the set wind speed of the new fan (S2); and adjusting the output wind speed of the new fan on the basis of the set temperature, the air supply temperature, the middle-portion temperature of the indoor heat exchanger, the current output wind speed, and the set wind speed (S3).