You have light bulbs in your house, right, the LED kind?
The lights shine at the Royal Swedish Academy of Sciences in Stockholm, Sweden's capital, on Oct. 7, 2014, where the winner of the 2014 Nobel Prize in Physics is about to be born.
Finally, the pieces fell into place.
The 2014 Nobel Prize in Physics was awarded to three Japanese physicists for their invention of the "high-brightness blue light-emitting diode," or LED, as it is now commonly known.
The award citation was particularly moving: incandescent lamps illuminated the 20th century, and LEDs will illuminate the 21st century.
In fact, life has always been like this - there are many unassuming things around you that could be the great inventions that changed the world, such as the negative pressure ambulance that is the subject of today's article.
The word "negative-pressure ambulance" appeared as often as the tons of vegetables donated by the people of Shandong during this period.
The Midea Group donated a Brilliance Renault Jinbei negative-pressure ambulance
What is a negative-pressure ambulance?
What made it a hit during the epidemic?
Can our ordinary civilian vehicles learn from its advanced experience?
Today we're going to talk about this topic in plain English.
Negative pressure ambulance, from the name can also see a general, is the car rescue warehouse air pressure & lt; outside atmospheric pressure ambulance. Negative pressure "negative" word, is less than the meaning.
What are the benefits of negative pressure?
As an example, for example, after playing basketball you are thirsty, grab a bottle of mineral water directly to the bottle blow.
As you drink, you realize that the bottle is getting more and more deflated, and you're using more and more energy to get the water into your mouth.
This time, the bottle is under negative pressure.
When you finish drinking, you throw the bottle away, and the air rushes in immediately to "prop" the bottle back to its original shape.
This is the process of returning the bottle to normal air pressure.
Back to the negative-pressure ambulance: because of the negative pressure, the air outside the car can freely enter the car, while the air inside the car can not "run" to the outside of the car.
For a virus like 2019-nCoV, which can be spread by droplets, there is a risk of spreading the outbreak in an ordinary ambulance, so negative-pressure ambulances have taken a big step into the history books.
Of course, the principle is simple, but the internal design of a professional negative pressure ambulance is much more complex.
First of all, how to deal with the contaminated air inside the negative pressure ambulance is a problem.
This "plastic cover" scientific name negative pressure isolation warehouse, is the second line of defense of the negative pressure ambulance
To this end, the negative pressure ambulance internal integration of air supply, exhaust, air filtration, ultraviolet ray poisoning, negative pressure detection and alarm and a series of functions within the "exhaust purification devices
This car of medical equipment is not cheap
Together with the car carrying medical equipment (emergency rescue), electrical equipment (such as power supply system), negative pressure preparation system, after-sales insurance, an ordinary negative pressure ambulance can easily be sold out of the price of a new Porsche 718.
If I had known that ambulances are expensive, I didn't realize that negative pressure ambulances are the Rolls Royce of ambulances, right?
Negative pressure only makes sense if the passenger compartment is completely airtight
Unfortunately, our regular cars can't be completely airtight (the ambulance compartment is the passenger compartment for civilian cars), making it difficult to achieve the same level of protection as a negative-pressure ambulance.
Is there nothing that can be done?
Not necessarily, we can think of the problem from another angle: our ordinary car can not create negative pressure, but if the car is always positive pressure or slightly higher than atmospheric pressure, the outside world air is not rushing in?
Theoretically, yes.
Like filling a mineral water bottle with water and screwing on the cap, we do get a relatively isolated passenger compartment.
Tesla actually did this.
Tesla's "Bio-Defense Mode" uses oversized HEPA?E12 air conditioning filters and maximizes airflow to create a relatively "pressurized, isolated" cockpit.
Tesla's HEPA air conditioning filter is quite large, more than ten times the size of an ordinary car
I believe that after the baptism of the epidemic, Tesla's logic of solving the problem will spring up in the major brands of major models.
In addition, the popularity of other means of in-car air purification is also promising.
For example, Xiaopeng G3 will soon push the high-temperature anti-bacteria mode (remote heating to 56 ℃ for one hour, many times lasting 60 minutes cycle sterilization), Rongwei car ultraviolet lamp remote sterilization technology, negative ion generator, higher specification air conditioning filter, and so on.
As I wrote in my article "Serious Science: Can a car be protected from viruses by replacing its "N95-grade" air-conditioning filter? I sincerely hope that this 2019-nCoV outbreak will turn "bad things into good things" and bring about some positive, positive, science-based changes and progress.
This article was written by the author of Automotive Home, and does not represent the views of Automotive Home.