These elevator cold knowledge, you know how many?

I. Why do I get dizzy at the moment of elevator operation?

Actually: instant dizziness is caused by the change of brain pressure.

Science time: When the elevator is running, there is a large acceleration, and the blood in the body produces an acceleration in the vertical direction opposite to the acceleration of the elevator, which makes the blood pressure, especially the brain pressure, change, leading to the lack of oxygen in the brain. Each person’s body condition is different, and the sensitivity to the change of brain pressure is also different, which leads to some people feel dizziness obviously, and some people do not feel it.

Second, can jumping before the elevator falls to the ground play a cushioning role?

Actually: it’s impossible. Because you simply can not jump.

Science time: to jump, there must be a landing point. And the rapid fall of the elevator process, the force of the elevator is fast down, simply can not force. That is to say, the elevator falls when people can not overcome the gravity of the falling elevator; assuming that you can jump up, but also because you can not predict the time to jump and lead to jump invalid. And then assume that you can jump at that critical moment, but because the elevator will generate a downward momentum when falling, only to reach an upward momentum of equal force can guarantee the safety of passengers in the elevator cabin, which is impossible to do.

Third, trapped in the elevator will suffocate and die?

In fact: the elevator car is not completely closed and will not suffocate.

Science time: the national standard has strict regulations on the ventilation of the elevator, even when trapped in the elevator, the ventilation system is normal ventilation. In addition, the elevator has many moving parts, such as there are gaps between the car wall and the car roof, and these gaps are enough for people’s breathing needs. However, it should be reminded that do not call for help loudly for a long time and do not fidget in the elevator to consume physical energy. One should be calm, call the phone and wait for rescue.

Fourth, in the elevator why would be embarrassed?

In fact: the distance between people in the elevator is too close to each other, more than the general heart of the safe distance.

Science time: Professor Babette Lenneberg, a clinical psychologist at the Free University of Berlin, said that normally, the distance between people is about an arm’s length, and when closer than this distance, anxiety will arise, especially when eye contact anxiety will be stronger. Therefore, in the elevator to avoid some containing threats, grotesque and other implications of the action is particularly important, the simplest way is to avoid the collision of eyes.

V. Why is there a mirror in the elevator?

You think the mirror installed in the elevator is to look at the mirror?

In fact, the original purpose of the installation of mirrors in the elevator is to Convenience for the disabled. Wheelchairs in the elevator is difficult to turn around, with the mirror, they can see the floor display light from the mirror without turning around or turning the wheelchair.

Alleviate claustrophobia. The closed and small space in the elevator can easily make people feel depressed, and the mirror can increase the visual space and reduce the depression.

Prevent thieves. Mirrors can reduce the visual dead space, and the security level is improved.

Convenient for passengers. Confirm whether the car arrives or not.

Of course, the most essential role of the mirror in the elevator also still play, that is: shine yourself, the whole appearance.

Six, why sometimes the light in the elevator car will suddenly turn off?

In fact: this is the elevator’s energy-saving device has been activated.

Science time: nowadays, many elevators are equipped with energy-saving devices. If passengers enter the elevator car and do not press the floor button within the time set by the system, then the system will default that no one is using the elevator at this time, and the elevator will then enter the energy-saving mode, and the lights in the car will go out. At this time, passengers only need to press any button on the operation panel, and the elevator will exit energy-saving mode, and the lighting inside the car will come on again.

Seven: Why are there not communication signals in all elevator cabs?

Some people may find that when they walk into the elevator car while making a phone call or sending a message, sometimes the signal will be weak or even interrupted; sometimes it is still very clear. What is the reason for this?

In fact: it mainly depends on whether the operator’s signal coverage device is installed in the shaft.

Science time: usually, the elevator shaft and car will shield most of the cell phone communication signal, and some elevator shaft installed communication signal coverage device, then in the elevator to call or send text messages will still be unimpeded, if not installed such devices, people enter the elevator, the cell phone signal will become weak or interrupted.

 
Eight: Many people worry about the elevator suddenly falling during operation, but in fact, although “elevator falling” is a frequently encountered fault, but the elevator is not really falling.

There are two general cases of “elevator falling”.

1、Emergency stop during the operation of the elevator

Generally this is because the safety circuit or door lock circuit is disconnected during operation, causing the elevator to stop, and passengers will feel their legs tingling, which is actually caused by the elevator emergency stop.

2、The elevator fails during operation and automatically returns to the base station to reset
And most people misunderstand the “elevator fall down”, the probability of this situation and buy a lottery ticket in the probability of 5 million almost.

Nine, the elevator wire rope will break off?

Some articles on the Internet explain – “elevator in general the sudden fall, are due to traction elevator wire rope breakage caused by”, look more let people think the wire rope is easy to break off like …
In fact, the wire rope is not as fragile as you think. Elevator car are traction by the wire rope, the greater the load the more wire rope roots. For the general residential building elevator, at least 3 wire rope, each wire rope about 10 small steel strands, each steel strand and 10 steel wire, as long as a broken one will replace the whole. Theoretically a wire rope bearing capacity is enough, broken two only one left also do not have to be afraid. And, the probability of the wire rope all broken is really almost not.