Controller, air conditioner, and high-pressure protection circuit

A controller for controlling an air conditioner, comprising a first rectifier unit, a power conversion unit, a high pressure switch (HPS) wiring terminal, a low-voltage control unit, and a high-voltage operating unit;

• wherein an input end of the first rectifier unit is capable of being electrically connected to an input power supply, an output end of the first rectifier unit is capable of being electrically connected to an input end of the power conversion unit, and the first rectifier unit is configured to convert an input alternating current (AC) into a high-voltage direct current (DC) and output the high-voltage DC to the power conversion unit;
• wherein an output end of the power conversion unit is capable of being electrically connected to a power supply end of the low-voltage control unit, and the power conversion unit is configured to convert the high-voltage DC into a low-voltage DC and output the low-voltage DC to the power supply end of the low-voltage control unit to supply power to the low-voltage control unit;
• wherein the HPS wiring terminal is capable of being electrically connected to a pressure switch, the HPS wiring terminal is connected to a front end of the power supply end of the low-voltage control unit so as to be capable of switching off or switching on a power supply voltage of the low-voltage control unit;
• and
• wherein an output end of the low-voltage control unit is connected to a control end of the high-voltage operating unit, and the low-voltage control unit is configured to output a control signal to control operation of the high-voltage operating unit.