Pneumatic control system in elevator lift car

Abstract

The invention relates to a pneumatic control system in an elevator lift car. An elevator is controlled to reduce pressure in the elevator lift car in the ascending process or to increase pressure in the elevator lift car in the descending process. The pneumatic control system comprises an air blower, an air storage tank, a pressure reduction piping group, a pressure increase piping group, a valve set, an air pressure detecting device and a control device. The air blower is arranged at the bottom of the elevator lift car, air pressure is generated continuously in the same direction when the elevator operates, and air is filled into the air storage tank or exhausted from the air storage tank so that positive pressure or negative pressure can be formed. The pressure reduction piping group and the pressure increase piping group are connected with the elevator lift car, the air blower and the air storage tank. The valve set is arranged in the pressure reduction piping group and the pressure increase piping group for controlling air circulation. The air pressure detecting device detects the air pressure in the elevator lift car and outputs detection signals. The control device regulates the opening and closing and the opening size or the opening position of the valve set according to the detection signals and controls the air pressure in the elevator lift car. Compared with the prior art, the pneumatic control system in the elevator lift car can eliminate the discomfort of passengers due to ear pressure in the ultra high-speed elevator lift car in the lifting process.

Description

technical field [0001] The invention relates to an air pressure control system, in particular to an air pressure control system in an elevator car. Background technique [0002] In recent years, with the continuous emergence of super high-rise buildings, the lifting speed of elevators has also been continuously improved. Today's fastest ultra-high-speed elevator is close to 18m / s, and the maximum travel distance is more than 500 meters. In the above-mentioned long-travel ultra-high-speed elevator, there is a problem that a large air pressure fluctuation occurs in the car as the elevator car moves up and down. Such air pressure fluctuations will cause uncomfortable ear pressure to the passengers in the car. In severe cases, it can even cause tinnitus. [0003] As a method to solve this problem, a known method is to set a blower in the elevator to adjust the air pressure in the elevator car through a suction and exhaust air volume adjustment mechanism, such as the technical...

AI Technical Summary

Problems solved by technology

In the above-mentioned long-travel ultra-high-speed elevator, there is the following problem: as the elevator car moves up and down, a large air pressure fluctuation will occur in the car

However, in the prior art, the size of the blower is not clearly indicated. Since the blower is limited by the size of the elevator car and the allowable noise of the elevator, it is impossible to use a blower with a large wind power.

Therefore, it can be considered that only a blower with small wind power cannot meet the requirements of rapid changes in the air pressure in the elevator car.

Images