Can you use hot water to pour hot water on frozen car windows in winter? | Car "rumor" crusher

Nowadays, cars play an indispensable role in our lives. With the rise and development of things, "rumors" also arise.

Have you ever heard some "rumors" about cars but don't know whether they are true or not?

The car "rumor" crusher will decipher the truth behind the "rumors" for you one by one. Please take a look at the content of this issue.

01-Don’t turn on the air conditioner as soon as you start your car in winter

Rumor: You can use hot water to pour hot water on frozen car windows

The truth: The above statement is a rumor! The outdoor temperature is too low at night, and the residual rain and snow often cause a layer of ice to form on the car windows. If you pour hot water on the frozen car windows at this time, the car windows will suddenly heat up. The strong change between hot and cold can easily cause the glass to crack due to thermal expansion and contraction, and it will also have different degrees of impact on the car paint. It is recommended that car owners use a snow shovel or card to scrape off the ice on the car windows, and scrape in one direction, and do not let the tool "wander" on the car window, otherwise the glass will become "big clown face".

As new energy vehicles gradually lead the new trend of automobile design, more and more car companies have begun to use hidden door handles, which can reduce wind resistance and enhance the sense of technology. But it is "awkward" in extremely cold weather - the door handles cannot pop out and you can't get into the car.

In this case, don't rush to use hot water to melt the ice. If the vehicle is equipped with a remote start function, you can use a mobile phone or other device to remotely start the vehicle's air conditioner first. When the temperature in the car rises, the door handle will naturally melt.

02- If an accident occurs without wearing a seat belt, the airbag may become a "killer" airbag, causing high-impact injuries to the human body

Rumor: Some people believe that the darker the color of the car's thermal insulation film, the stronger the material's ability to absorb light and the better the thermal insulation effect.

The truth: The above statement is true!

The airbag system is a passive safety protection system in the automobile safety system. It is used in conjunction with the seat belt to provide effective anti-collision protection for the occupants. When properly coordinated, the airbag can reduce the head injury rate by 25% and the facial injury rate by about 80% when the car collides. The airbag also has its "unsafe" side. If the car is traveling at a speed of 60km/h, a sudden collision will stop the vehicle within 0.2 seconds, and the airbag will pop out at a speed of about 300km/h, and the resulting impact force is about 180 kilograms. If you are not wearing a seat belt at this moment, excluding the situation of flying directly out of the front windshield and hitting the oncoming airbag, it is difficult for the head, neck and other vulnerable parts of the human body to withstand, which will undoubtedly cause secondary damage to the human body.

Therefore, you must fasten your seat belt when getting in the car so that the airbag can better protect your safety when the vehicle collides.

03- Some people say that eating lychees while driving will be treated as drunk driving

Rumor : Some people say that eating lychees while driving will be treated as drunk driving

The truth: The above statement is inaccurate! Although you may be detected as drunk driving after eating lychees, there is no need to panic. There is a fundamental difference between "drunk driving caused by eating lychees" and "real drunk driving".

So why would eating lychees result in a drunk driving test? In fact, it is mainly the sugar in lychees that is at work. On the one hand, the fructose in lychees will ferment to produce alcohol through "anaerobic respiration" in a closed storage environment; on the other hand, a large amount of sugar in lychees will provide nutrients to the bacteria in the mouth, causing them to produce alcohol and other substances. These reasons overlap with each other, and it is easy for a breath test to be misjudged as "drunk driving" after eating lychees. To prevent being mistakenly found to be drunk driving, you can rinse your mouth with water after eating fruit or fermented food, and wait for the alcohol components in the mouth to dissipate naturally, so that the breath test will slowly return to normal.

It should be emphasized that eating alcoholic foods is not the same as drinking alcohol. If the test is done after drinking, even after a few minutes, the test result will not only not decrease, but may increase. Therefore, do not take chances. Do not drink and drive, and do not drive after drinking. At the same time, in order to avoid unnecessary trouble and delays, it is recommended to avoid eating large amounts of high-sugar fruits such as lychees, durian, jackfruits, longans, raisins, and bayberries when driving.

04- Some people believe that when a car is driving, if the engine temperature is too high, it will cause great harm to the car, but if the engine temperature is too low, it will not cause any damage to the car.

Rumor : Some people believe that turning off the car air conditioner while it is working will have no effect on the air conditioner.

The truth : The above statement is a rumor!

When the engine temperature is too high, the oil will become diluted, the lubrication effect will be reduced, and the engine wear will be accelerated. When the engine temperature is low, the fuel cannot be completely burned, which will cause engine corrosion, oxidation of accessories, and shorten the service life of the engine. In view of the above two situations, some people have come up with a way to let the engine idle and heat up. However, due to the low engine speed, the lubricating oil output by the oil pump cannot be pressed into the surface of each lubricating part quickly due to the low pressure, so that the moving parts of the engine work in a dry friction or semi-dry friction state, which will cause damage to the components. In addition, due to poor atomization of the fuel at low temperature, the unburned fuel will pass through the cylinder wall into the crankcase, and the oil film on the cylinder wall will be washed away, which will also accelerate the wear of the parts. Therefore, it is not advisable to let the engine idle and heat up.

Therefore, in order to extend the life of your car, it is recommended that after starting the car, you drive at a low speed for a while to allow the oil to slowly heat up and fully protect the engine .

Has this issue of the car "rumor" crusher helped you debunk some "rumors" that you didn't know were true or false before? If you have any rumors that you want to verify, please leave them in the comment section. Let's seek the scientific truth together!

The picture comes from the Internet