Abstract: An outdoor unit of an air conditioner includes an outdoor-unit main control circuit, a power supply, a power supply control circuit, and an outdoor-unit communication circuit. The power supply control circuit is disposed in a loop of a power supply line for supplying power to the power supply, and is configured to control the power supply line to supply power to the power supply by controlling on/off of the loop; and the power supply is configured to supply power to the outdoor-unit main control circuit and the outdoor-unit communication circuit after receiving the power supplied from the power supply line.

Abstract: An outdoor unit of an air conditioner includes an outdoor-unit main control circuit, a power supply, a power supply control circuit, and an outdoor-unit communication circuit. The power supply control circuit is disposed in a loop of a power supply line for supplying power to the power supply, and is configured to control the power supply line to supply power to the power supply by controlling on/off of the loop; and the power supply is configured to supply power to the outdoor-unit main control circuit and the outdoor-unit communication circuit after receiving the power supplied from the power supply line.

Abstract: A water fullness alarm device may include an alarm switch, a bracket, and a float. The alarm switch may include an alarm switch body and a switch button disposed on the alarm switch body, where the switch button is adjacent to an elastic piece, and where a first end of the elastic piece is fixed on the alarm switch body and a second end of the elastic piece is free. The bracket may be rotatable, where a first end of the bracket is connected with the float, and where a second end of the bracket is propped against the elastic piece. The first end and the second end may be integrally formed such that the second end swings synchronously with the first end around an axis when the bracket rotates, where the second end drives the elastic piece to trigger the switch button when the bracket rotates.

Abstract: The present disclosure provides a PFC converter control method, an inverter household appliance and a PFC converter control method for an inverter household appliance, where the method includes: controlling the PFC converter to generate a frequency offset function where frequency offset value periodically varies with time, superimposing the frequency offset function on a carrier reference frequency of the PFC converter to obtain a periodically varying PFC carrier frequency function; detecting a phase of a voltage of an alternating current of an electrical grid, and controlling a PFC carrier frequency corresponding to each frequency point of the PFC carrier frequency function to periodically vary with the phase of the voltage of the alternating current of the electrical grid, which effectively reduces an amplitude of the highest interference power spectrum detected during a test process, and achieves the purpose of reducing the level of electromagnetic interference in the high frequency PFC technology.

Abstract: The present disclosure provides a PFC converter control method, an inverter household appliance and a PFC converter control method for an inverter household appliance, where the method includes: controlling the PFC converter to generate a frequency offset function where frequency offset value periodically varies with time, superimposing the frequency offset function on a carrier reference frequency of the PFC converter to obtain a periodically varying PFC carrier frequency function; detecting a phase of a voltage of an alternating current of an electrical grid, and controlling a PFC carrier frequency corresponding to each frequency point of the PFC carrier frequency function to periodically vary with the phase of the voltage of the alternating current of the electrical grid, which effectively reduces an amplitude of the highest interference power spectrum detected during a test process, and achieves the purpose of reducing the level of electromagnetic interference in the high frequency PFC technology.

Abstract: A water fullness alarm device may include an alarm switch, a bracket, and a float. The alarm switch may include an alarm switch body and a switch button disposed on the alarm switch body, where the switch button is adjacent to an elastic piece, and where a first end of the elastic piece is fixed on the alarm switch body and a second end of the elastic piece is free. The bracket may be rotatable, where a first end of the bracket is connected with the float, and where a second end of the bracket is propped against the elastic piece. The first end and the second end may be integrally formed such that the second end swings synchronously with the first end around an axis when the bracket rotates, where the second end drives the elastic piece to trigger the switch button when the bracket rotates.

Abstract: An air conditioner indoor unit, comprising a shell, the shell being provided with an indoor air inlet, an outdoor air inlet, and an air outlet, a double side air inlet centrifugal fan being arranged inside the shell, the centrifugal fan comprising a first air inlet side, a second air inlet side, and an air outlet side, the first air inlet side being arranged opposite the indoor air inlet, the second air inlet side being arranged opposite the outdoor air inlet, the air outlet side being arranged opposite the air outlet, and a heat exchanger being arranged between the first air inlet side and the indoor air inlet. The air conditioner indoor unit of the present disclosure is used for adjusting indoor air temperature and quality.