What is a negative pressure ambulance?
According to the "Diagnosis and Treatment Plan for Infected Pneumonia in novel coronavirus (Trial Fourth Edition)" issued by National Health Commission, respiratory droplet infection is the main transmission route of this epidemic. In the narrow space of an ambulance, the risk of virus transmission will naturally increase greatly. At the same time, in the process of transportation, there is still the risk that the virus will leak into the environment along the way. Therefore, the significance of the existence of negative pressure ambulance is to completely cut off all kinds of transmission possibilities during transshipment.
As the name implies, the biggest difference between negative pressure ambulance and ordinary ambulance lies in the addition of negative pressure function. Through the work of the negative pressure generator, the pressure in the car can always be lower than the external atmospheric pressure. I remember that the junior high school physics textbook says that gas will flow from places with high pressure to places with low pressure, so that the air in the car will not flow out through gaps such as doors and windows, effectively preventing the spread of viruses.
For the interior of the car, air conditioners and fans use the principle of fluid mechanics to form a top-down directional airflow in the car. The airflow will first flow through the medical staff sitting in a higher position, and then through the patient lying flat in a lower position. Finally, the air in the car will be disinfected by the filter and then discharged from the car, and will not enter the car for recycling, which fully guarantees the safety of medical staff in the car and the outside world.
If it is to deal with more infectious diseases, the negative pressure ambulance can also be equipped with a negative pressure isolation cabin with stricter protection measures, so that the patient's breathing is completely isolated from other passengers in the car and the possibility of cross-infection is avoided.
Apart from the difference in hardware, what is the difference between negative pressure ambulances?
First, the biggest difference is the price. Because the negative pressure ambulance has added negative pressure equipment and isolation cabin, even the relatively low-priced China brand, the quotation is basically more than 300,000 yuan, which is at least 6,543,800 yuan more expensive than the ordinary ambulance of the same brand.
Of course, this part of the price difference is not only expensive on additional equipment. Negative pressure ambulance can achieve negative pressure, the most basic premise is to ensure the absolute air tightness in the car, which has extremely strict requirements on the assembly technology and material level in the car, saying that its quality control requirements are higher than those of luxury brand passenger cars.
Another big difference is the production process. Compared with the traditional passenger cars that can be delivered to the end users from the main engine factory, commercial vehicles including ambulances need to be customized on the basis of the basic vehicles. For example, the modification of negative pressure ambulance needs to go through many processes, such as foam insulation treatment, wiring, interior installation, electrical and medical equipment installation, negative pressure facilities installation and so on, which greatly increases the production cycle.
Take SAIC Chase as an example. On New Year's Eve, we received the urgent task of delivering 60 negative-pressure ambulances within 10 days, which means that only 6 ambulances can be produced every day on average. It seems inefficient, but it is actually the fastest speed after the factory works overtime and shortens the production cycle by two-thirds. It can be seen that the production of negative pressure ambulance is difficult and the steps are complicated.
Which manufacturers are producing negative pressure ambulances?
In addition to medical workers fighting in the front line of fighting the epidemic, autobots are not far behind. Compared with the rest of most industries during the Spring Festival holiday, the automobile industry insists on working overtime, which provides a solid guarantee for fighting the epidemic. Among them, domestic first-class commercial vehicle manufacturers such as Beiqi Futian, Fujian Benz, Jiangling Group, Yutong Group, Brilliance Group, SAIC Datong, Jiangling Ford and Nanqi Iveco all received orders for negative pressure ambulances. At present, most negative pressure ambulances have been successfully off the assembly line and rushed to the front line of disaster relief, which has played its due role.
In addition to commercial vehicle companies, mainstream refitting and special vehicle companies such as Qingdao Sol, Ningbo Caffrey and Zhuhai Peng Yu have also ordered basic vehicles and emergency refitting negative pressure ambulances. Among them, Jiangling Group, a major manufacturer of ambulance chassis, has received more than 200 chassis orders, and more negative-pressure ambulances will be put into disaster relief in the future. Although there are many manufacturers and different models of negative pressure ambulances, in order to ensure enough space inside, all models adopt high-top models, and the internal height can basically be guaranteed to be around 1.7 meters, so there will be no oppressive feeling when riding.
Jin Shu's viewpoint
"If you want to do a good job, you must sharpen your tools first." In order to win this silent battle against the epidemic, advanced medical equipment is essential. With the continuous use of negative pressure ambulances, the work of frontline medical workers will be even more powerful, and it will naturally become just around the corner to repel the epidemic. The cherry blossoms in Wuhan will bloom as scheduled this spring.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.