Switching power supplies play a vital role in modern refrigerators and air conditioners, powering their control systems, sensors, and auxiliary components. Unlike traditional linear supplies, they efficiently convert mains AC to the low-voltage DC required by electronic circuits, enhancing energy efficiency and performance.

In refrigerators, the switching power supply powers the main control board, temperature sensors, LED displays, and fan motors. It converts 110V/220V AC to 5V, 12V, or 24V DC, ensuring stable operation of microprocessors that regulate cooling cycles, defrosting, and temperature settings. A reliable supply prevents erratic behavior, such as incorrect temperature readings or failed compressor cycles.

Air conditioners rely on switching power supplies for their inverter systems, which adjust compressor speed to match cooling demands. The supply powers the inverter’s control logic, sensors (e.g., temperature, humidity), and communication modules (for smart ACs). By providing stable DC power, it enables precise control of the compressor motor, improving energy efficiency by up to 30% compared to non-inverter models.

Protection features are essential. These supplies include overcurrent protection to safeguard against short circuits in control boards and overvoltage protection to handle mains fluctuations. They also operate over a wide input range (100V-240V), making them suitable for global markets. In smart appliances, the power supply supports connectivity modules (Wi-Fi, Bluetooth), enabling remote control via smartphones, which requires consistent low-voltage power for reliable communication.

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