Air volume adjusting device

Abstract

The invention discloses an air volume adjusting device, and relates to the technical field of ventilation. The purpose of efficiently and conveniently adjusting the air volume of a fan is achieved. The main technical solution of the air volume adjusting device is characterized in comprising a frame, a plurality of blades and an adjusting mechanism, wherein the frame comprises opening ends which are oppositely arranged, the blades surround to form a wind shielding surface matching with the open end, a rotating shaft is arranged in the middle of each blade, the first end of each rotating shaft is rotationally connected with the frame, and the adjusting mechanism is connected with the second ends of the rotating shafts and used for adjusting the included angle between each blade and the planewhere the open end is located.

Description

technical field [0001] The invention relates to the technical field of ventilation, in particular to an air volume regulating device. Background technique [0002] Fans of rail transit vehicles can be used in a variety of equipment, such as air conditioning and ventilation systems, power cooling systems, etc. For the air conditioning and ventilation system, the fan usually has two purposes, one is to deliver air with a suitable air volume to the compartment, and the other is to install it on the outdoor unit of the air conditioning unit to discharge waste heat. Most of the fans for the first use are centrifugal fans, which require a large static pressure, and the second is usually an axial flow fan, which has the characteristics of large air volume and low static pressure. [0003] For the fans of the above two purposes, most of them are driven by constant speed motors. After the fan is installed, it is difficult to adjust the air volume in a large range. If the installed ...

AI Technical Summary

Problems solved by technology

After the fan is installed, it is difficult to adjust the air volume in a large range. If the installed fan deviates from the design value (usually too large), the air volume is generally adjusted by installing a temporary mesh plate at the air supply port or air inlet of the fan. It is made by stamping aluminum alloy or stainless steel plate, and the finished opening ratio is fixed. It is usually necessary to make multiple orifice plates with different opening ratios during application. The final plan is determined through experiments. Using this plan is suitable for fan air volume adjustment. The operation is more inconvenient, and the verification cycle is longer, which affects the efficiency of air volume adjustment

Images