Accurately controls the refrigerator's cooling system, keeps the temperature stable, maintains even cooling for freshness, reduces temperature fluctuations, and extends food storage time. The smart program chip orderly manages the compressor, fan, and defrost module, optimizes operation logic, lowers overall power consumption, and is energy-saving and eco-friendly. Stably drives the solenoid valve, precisely switches cooling circuits, achieves zoned temperature control, and meets the needs of refrigerators with multiple temperature zones. The interface pins are standard and organized, easy to plug and unplug, make firm contact, and are not easy to loosen, preventing intermittent refrigerator operation caused by poor contact. Stably drives the solenoid valve, precisely switches cooling circuits, achieves zoned temperature control, and meets the needs of refrigerators with multiple temperature zones.