Abstract: The electric control box includes a box body, a mounting plate, a radiator, an electronic component and a cooling fan; the box body is provided with a mounting chamber, the mounting plate is arranged in the mounting chamber and the mounting chamber forms a first chamber and a second chamber which are located at two sides of the mounting plate, the mounting plate is provided with a first ventilation opening and a second ventilation opening which are spaced apart, the first ventilation opening and the second ventilation opening enables communication between the first chamber and the second chamber; the radiator is at least partially arranged in the first chamber; the electronic component is arranged in the second chamber and is in heat conducting connection with the radiator; and the cooling fan is used for supplying air.

Abstract: Provided are a magnetic bearing compressor, an air conditioner and a protective air gap value setting method. The magnetic bearing compressor includes: a rotor, a magnetic bearing, a sensor, and a control device. The magnetic bearing is sleeved on the rotor; the sensor is arranged on the magnetic bearing and is configured to detect a distance value between the rotor and the sensor on a preset plane; the control device is configured to receive the distance value and determine the minimum distance value and the maximum distance value between the rotor and the magnetic bearing according to the distance value, and obtain an absolute value of a difference of the maximum distance value and the minimum distance value; and the control device obtains a protective air gap value according to the absolute value and a preset protection coefficient when the absolute value is less than or equal to a preset air gap value.

Abstract: A compressor driving device includes a three-phase alternating current power supply input end, a relay module, a rectifier circuit, and a driving control circuit which are sequentially connected; the rectifier circuit is used for converting connected alternating current into direct current and then outputting the direct current to a direct current bus; the driving control circuit is used for converting the direct current output by the direct current bus into compressor driving power; a pressure switch is used for measuring the pressure value in a refrigerating system, and when the measured pressure value is larger than a preset pressure threshold, disconnecting the power supply circuit of the relay module; the driving control circuit is also used for detecting the on-off state of the pressure switch and controlling the compressor to stop working when the pressure switch is switched off.

Abstract: An air guide ring for an air conditioner outdoor unit is provided. The air guide ring includes an air guide ring body. An air guide channel is defined in the air guide ring body. The air guide ring body includes a first limiting portion and a second limiting portion. The first limiting portion and the second limiting portion are configured to fit with a fixing member of the air conditioner outdoor unit and to implement bi-directional limiting, so as to prevent inward contraction deformation and outward expansion deformation of the air guide ring body from occurring.

Abstract: An air conditioner outdoor unit and an air conditioner are provided. The outdoor unit includes a casing, a water receiving member, an accommodation cavity, a circulation component, and a partition. The water receiving member is disposed on the casing and has an opening. The accommodation cavity is between the casing and the water receiving member. The accommodation cavity is in communication with the opening. The circulation component has a first part located in the accommodation cavity and a second part passing through the opening to be in communication with a device to be communicated. The partition is disposed in the water receiving member and located in the accommodation cavity. The accommodation cavity is divided into a first cavity and a second cavity by the partition.

Abstract: Disclosed are a sealed box container, a main machine of a heat recovery switching device and a refrigeration device. The sealed box container includes box bodies that are spliced to form a sealed cavity, and is provided with a through hole in communication with the sealed cavity, and the sealed cavity is used for accommodating a pipeline assembly of a main machine, and the pipeline assembly is connected to an external pipeline by means of the through hole.

Abstract: An air conditioner water system, a control method therefor, and a control device thereof, the method includes acquiring the pressure difference and temperature difference between a water intake pipe and a water discharge pipe of an air conditioner water system, the water intake pipe being connected to an inlet of a host module of the air conditioner water system, and the water discharge pipe being connected to an outlet of the host module; detecting and confirming that the pressure difference is less than or equal to a preset pressure difference, and controlling the operating frequency of a water pump of the air conditioner water system according to the pressure difference; and detecting and confirming that the pressure difference is greater than the preset pressure difference, and controlling the operating frequency of the water pump of the air conditioner water system according to the temperature difference.

Abstract: A control method for a heating system of an air conditioner, the method includes: obtaining ambient temperature and external heat exchanger evaporation temperature; obtaining external heat exchanger evaporation pressure, and obtaining, according to the external heat exchanger evaporation pressure, corresponding saturation temperature; and controlling a base plate heating device according to the ambient temperature, the external heat exchanger evaporation temperature, or the saturation temperature. The base plate heating device is controlled according to the ambient temperature, the saturation temperature corresponding to the external heat exchanger evaporation pressure, or the external heat exchanger evaporation temperature, and may avoid freezing of the base plate of an air conditioner, and may ensure normal drainage of the base plate during defrosting to improve the stability and reliability of the air conditioner.

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: An electric control box (100) for an air conditioner and an air conditioner with the same are provided. The electric control box includes a housing (1); a cooling fin (2) running through the housing (1) and having a part located inside the housing (1) and another part located outside the housing (1); an inner water-guiding part (3) located inside the housing (1) and below the cooling fin (2); an outer water-guiding part (4) located outside the housing (1) and below the inner water-guiding part (3), the inner water-guiding part (3) and the outer water-guiding part (4) defining a water guide passage (a) configured to guide water (b) inside the housing (1) to the outside of the housing (1).

Abstract: A heat exchanger, includes a heat exchange pipe unit and a fin unit, the heat exchange pipe unit includes a refrigerant input pipe, a heat exchange pipe assembly and a refrigerant output pipe; the refrigerant input pipe is connected to one end of the heat exchange pipe assembly; the refrigerant output pipe is connected to the other end of the heat exchange pipe assembly; the fin unit is fixedly arranged outside of the heat exchange pipe assembly; the heat exchange pipe assembly and the fin unit are made of aluminum alloy; and the corrosion potential of the aluminum alloy which forms at least a part of the heat exchange pipe assembly is greater than the corrosion potential of the aluminum alloy which forms the remaining part of the heat exchange pipe assembly.

Abstract: An outdoor unit (100) for an air conditioner and the air conditioner are disclosed. The outdoor unit (100) for the air conditioner includes: a housing (1), a FREON charging nozzle (14), and a connector assembly. The FREON charging nozzle (14) is disposed in the housing (1); the connector assembly has a first end connected to the FREON charging nozzle (14) and a second end extending out of the housing (1).

Abstract: The present disclosure discloses an air conditioner controlling method and apparatus, as well as an air conditioner having the same. The method includes: determining that an outdoor heat exchanger of the air conditioner runs in an evaporator state; acquiring a state signal of a refrigerant of an indoor refrigerating unit; and adjusting an opening degree of an electronic expansion valve of an outdoor unit according to the state signal of the indoor refrigerating unit. This method may adjust the opening degree of the electronic expansion valve of the outdoor unit according to the state signal of the indoor refrigerating unit when the outdoor heat exchanger of the air conditioner runs in the evaporator state, thereby effectively improving the reliability of control, broadening the reliable operation range of the system, and reasonably distributing the refrigerant between the indoor refrigerating unit and the outdoor unit under a low temperature working condition.

Abstract: A heat pump system and a control method therefor are provided. The heat pump system includes an outdoor heat exchanger and an electromagnetic heating assembly. The electromagnetic heating assembly includes an induction heating sheet, an insulation plate, and an electromagnetic induction wire coil. The induction heating sheet is in contact with the outdoor heat exchanger, the electromagnetic induction wire coil is attached to the insulation plate, the insulation plate is connected to the outdoor heat exchanger or the induction heating sheet, the induction heating sheet is coupled with the electromagnetic induction wire coil by communication.

Abstract: Disclosed are a motor variable frequency driving system and a multi-split central air conditioner. The motor variable frequency driving system includes: a three-phase alternating-current input, a rectification module, a thin-film capacitor, an inverter, a vector control module, an A/D sampling module and a steady state processing module. The rectification module is connected to the three-phase alternating-current input; the thin-film capacitor is arranged between output ends of a direct current output; an input end of the inverter is connected to an output end of the direct current output; an output end of the inverter is connected to a three-phase alternating current motor; the vector control module is connected to the inverter; the A/D sampling module is used for collecting direct current bus voltages of two ends of the thin-film capacitor; and the steady state processing module is connected to the A/D sampling module.

Abstract: A two-pipe enhanced-vapor-injection outdoor unit and a multi-split system are provided. The two-pipe enhanced-vapor-injection outdoor unit includes: an outdoor heat exchanger and a second port; an enhanced-vapor-injection compressor, including a gas discharge port, a gas return port and an injection port; a reversing assembly, including first to fourth ends; a supercooler, including a main heat-exchange flow path and an auxiliary heat-exchange flow path communicated with each other, the main heat-exchange flow path being connected to the second port, the auxiliary heat-exchange flow path being connected to the injection port; and a throttling assembly having a first end connected to an outlet of the main heat-exchange flow path, and a second end connected to an inlet of the outdoor heat exchanger.

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: An outdoor unit for a central air conditioner and a central air conditioner having the same are provided. The outdoor unit includes a unit body and at least One panel. One side of the unit body is open, and the panel is arranged on the side of the unit body to open and close the unit body. One end of the panel is pivotally and detachably connected to the unit body through a pivot structure. The pivot structure includes a base provided on the unit body and a pivot seat provided on the panel. A top of the base has a pivot shaft spaced apart from the unit body and extending upward, and the pivot seat is provided with a pivot hole having an open bottom and configured to be detachably fitted with the pivot shaft.