Does the negative pressure ambulance air conditioner open internal circulation or external circulation?

This negative pressure system uses the external circulation of air conditioner to bring fresh air to the medical warehouse. The so-called negative pressure is to use technical means: make the air pressure inside the car lower than the external atmospheric pressure, so that when the air flows freely, it can only flow from the outside to the inside of the car, and the air inside the car will not spread to the outside. Of course, the principle is like this, but the internal design of professional negative pressure ambulance is much more complicated. The overall cost of negative pressure ambulance is about 40% higher, and the price including medical equipment is generally about 600,000 yuan. The principle of negative pressure ambulance? The core of negative pressure ambulance is negative pressure system. Simply put, this negative pressure system uses the external circulation of air conditioner to bring fresh air into the medical warehouse.

In addition, the patient's head is also equipped with ventilation, filtration and disinfection devices, so that the polluted gas exhaled by the patient can be discharged from the car after harmless treatment, forming a set of safe air circulation. As we all know, novel coronavirus is a respiratory disease, and its main transmission routes are droplet transmission, contact transmission and short-range transmission of respiratory aerosol. Therefore, air is the most important medium of communication, which is why it is necessary to wear masks and take protective measures during the epidemic.

The negative pressure ambulance is equivalent to a large detachable N95 mask. Using negative pressure ambulance to transport patients can avoid cross-infection between doctors and patients and virus pollution to the external environment to the maximum extent, and can effectively prevent the epidemic from spreading further. Thank you, for your reference only.