Within the emergency medical system, an ambulance serves as far more than just a means of transport; it functions as a mobile resuscitation unit. The environmental quality inside the medical cabin directly impacts a patient's physiological and psychological state, while also influencing the operational efficiency of the medical crew. In recent years, DC electric air conditioning systems have seen accelerated adoption within the ambulance sector. By fundamentally resolving the inherent drawbacks of traditional systems—such as excessive noise, strong vibrations, and a reliance on engine idling—these new systems represent a qualitative leap forward in pre-hospital emergency care.

As the global healthcare system accelerates its green and low-carbon transformation, electric ambulances are gradually becoming the new mainstay of urban emergency response. However, amidst this electrification wave, a critical technical challenge concerning patient safety and emergency care quality is becoming increasingly prominent—how to provide stable, powerful, and quiet cooling for the ambulance cabin while parked or traveling at low speeds?