Elevators belong to special equipment, but also an important infrastructure of people's daily life, related to the life safety of all residents, we need to jointly maintain and supervise.
However, many people's understanding of the elevator only stays on the "understanding", and only when they encounter elevator failures or see relevant news, they will think of the safety of the elevator.
Those elevator safety knowledge that is easy to be ignored by people often make you have a higher safety guarantee at critical moments, I hope you don't need it, but you must understand.
Today we continue to broadcast.
1 Question:Why do high winds cause elevator doors to not close?
The situation that the elevator cannot close the door due to strong wind is more common in the north, and it is mainly seen on the first floor and top floor of high-rise buildings in the south. The reason is that when the wind pressure is too large, the elevator door will be pushed by external force by default, so as to start the safety protection.
2 Questions:What is the Elevator Chimney Effect?
It means that in the elevator shaft, the temperature outside the shaft is lower than the temperature in the shaft, and the air will flow upward along the space of the shaft, and the cold air outside enters the elevator shaft through the building doors and windows and the elevator hall door, forming a convection flow with the hot air in the shaft, resulting in the air pressure difference between the shaft and the elevator hall.
3 Questions:What is the effect of the chimney effect on elevators?
First, the pressure difference on both sides of the elevator door is too large, which is easy to cause the failure of the opening and closing doors
Second, the air convection inside and outside the hoistway will vibrate when it passes through the gap of the layer door, so as to make abnormal noise;
Third, when the high-speed airflow moves in the opposite direction with the elevator, it can produce a more serious turbulence up and down the elevator car, resulting in a decrease in the comfort of the car operation or even shaking.
4 Questions:Why are there mirrors in the elevator?
The main function is to assist wheelchair users to confirm the entrance and exit of the elevator when entering and exiting the elevator, and at the same time, it also has the functions of increasing the sense of space, reducing claustrophobia, preventing thieves, and tidying up the appearance.
5 Questions:What are the little bumps on the elevator buttons?
The pattern of small bumps is Braille, which makes it easy for the visually impaired to find the floor button they want to go to when using the elevator alone.
6 Questions:Why are the lights suddenly turned off in the elevator compartment?
The elevator is equipped with an energy-saving device, and if no one presses the floor button in the compartment for too long, the system will think that the elevator is unused at this time, enter the energy-saving mode, and turn off the lights.
7. Questions:Why do hospital elevator doors always open on one side?
One is the side-opening type that opens from one side to the other, which can save the space of the elevator shaft, so that the elevator door is wider and convenient for the entry and exit of hospital beds and instruments
Second, the sealing of the side-opening elevator door is better, which meets the disease control needs of the hospital.
8 Questions:Why does the elevator level the floor self-test?
When the elevator control system checks out that the error between the position of the elevator car and the target floor exceeds the specified range, the leveling self-test procedure will be triggered, and the elevator control system will automatically let the elevator return to the starting floor, and then re-conduct the leveling self-test until the elevator can accurately stop at the target floor.
Passengers do not need to panic when they encounter a self-inspection on the flat floor, and they can wait in the compartment to open the door at the station.
9 Questions:Why does the elevator stop suddenly?
In order to protect the safety of passengers, the elevator control system will automatically cut off the power supply, and the safety loop or door lock circuit will be disconnected, causing the elevator to stop, and passengers may feel numb legs.
About elevator safety.
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