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Elevator device and noise reduction method in car

An in-car and elevator technology, which is applied to elevators in buildings, transportation and packaging, sound-producing equipment, etc., to achieve the effect of reducing noise and taking into account the design.

Active Publication Date: 2017-09-29
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, considering the design in the car, it is not preferable to install the reference microphone on the side where the passengers are easy to notice.

Method used

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  • Elevator device and noise reduction method in car
  • Elevator device and noise reduction method in car
  • Elevator device and noise reduction method in car

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Embodiment Construction

[0053] The present invention relates to a technique for reducing noise in a car generated during operation of an elevator. It specifically relates to the technology for reducing the acoustic standing wave in the car excited by the aerodynamic noise generated by the car moving in the elevator passage, the solid vibration sound caused by the sliding of guide rails and rollers, etc. A high-speed elevator that moves at 500-1000m per minute. In addition, it relates to a technique for providing a simple and inexpensive method for providing a simple and low-cost method that is compatible with the design of the elevator car by limiting only the vertical direction 2 that has the greatest influence on noise evaluation points among the standing acoustic waves generated in the elevator car. A method for effectively suppressing the first-order standing waves to effectively reduce the noise in the car and a structure for realizing it.

[0054] One embodiment (Embodiment 1) of the present i...

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Abstract

The invention provides an elevator and a car noise reduction method; the method can simply limit sound standing waves in the car with low cost so as to effectively and stably reduce car noises; the invention also provides a structure realizing the method; an car (20) inner look up ceiling, formed by a ground panel, a ceiling panel, a front panel, a back panel and left and right panels, is viewed to be an approximately rectangular shape; four peaks of the rectangular are provided with openings (32a); the inner side, viewed from the inner side of the car, of the opening is provided with a cavity (32); the inner side of the cavity outputs control purpose second stage sound waves, so the radiation in the car can be controlled by the second state sound wave from opening (32a) on the four peaks of the ceiling.

Description

technical field [0001] The present invention relates to an elevator car structure, in particular to a technology for suppressing low-frequency noise and low-frequency acoustic standing waves generated in the car. Background technique [0002] Along with the development of high-rise building construction technology, the speed of elevators is being increased, and recently, high-speed elevators that ascend at a speed of 1000 m per minute or more have been commercialized. In these high-speed elevators, since the car moves in the hoistway at high speed, the flow of air around the car is separated to generate fluid noise. Since the fluid noise generally increases in proportion to the sixth power of the speed, the noise in the car becomes very loud, and the comfort in the car is remarkably deteriorated. In order to improve this, in a general high-speed elevator, a streamlined airtight cabin as shown in Patent Document 1 or a member called a spoiler is arranged above and below the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B11/02G10K11/178
Inventor 武藤大辅河村阳右伊藤康司高原悠三好宽
Owner HITACHI LTD
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