As new energy technologies continue to permeate the field and public health emergency systems are steadily upgraded, DC electric air conditioners for ambulances are moving from an “optional feature” to a “standard component.” Traditional ambulance air conditioners rely largely on the vehicle’s engine, which not only consumes high amounts of fuel and generates significant noise but also fails to provide continuous cooling when the engine is turned off while parked. DC electric air conditioners, by contrast, draw power directly from the vehicle’s battery or high-voltage traction battery and operate independently of the engine, becoming an essential technological safeguard in pre‑hospital emergency care.