Roof fan with adjustable air volume

Abstract

The invention discloses a roof fan with adjustable air volume. The roof fan comprises a ventilation pipe, an air volume measuring device, a power assembly, an adjusting air valve and an air gatheringcylinder, wherein the ventilation pipe comprises a plurality of sections of identical straight air cylinders; the two ends of the ventilation pipe are connected with the air gathering cylinder and theadjusting air valve correspondingly; the power assembly is arranged in the ventilation pipe to accelerate the airflow flow speed; and the air volume measuring device is arranged in the adjusting airvalve and comprises an impeller type probe. The roof fan has the beneficial effects that the impeller type probe can measure the air volume in the roof fan in real time and feed back the air volume toa central controller in a pulse signal mode, and the central controller accurately and intelligently adjusts the air volume in the roof fan to be the required air volume; a polyurethane material witha good heat insulation and heat preservation effect is adopted, so that the heat insulation and heat preservation effects are achieved, and the situation that condensate water occurs due to temperature difference is avoided; the ventilation pipe is split, so that transportation is facilitated, and the cost is reduced; and the structure is simple, and mounting and later maintenance are facilitated.

Description

technical field [0001] The invention relates to the field of ventilation, in particular to a roof fan with adjustable air volume. Background technique [0002] Ventilation devices are usually hung on the roof of the farm to improve the air quality of the farm; in summer, due to the hot temperature and high humidity of the rain, the ventilation device is used to cool and dehumidify the farm; in winter, due to the cold temperature, the farm Airtight insulation is required; however, the current ventilation device only has ventilation function and cannot keep insulation, and the ventilation air volume cannot be adjusted. [0003] Although there are solutions to the above problems in the prior art, certain defects still exist. For example, a new type CN207777230U roof fan with automatic air output adjustment includes a base on which an air duct is fixed, a motor is fixed inside the air duct, and fan blades are fixed on the output shaft of the motor. The upper end of the air duc...

AI Technical Summary

Problems solved by technology

Although the roof fan can realize the automatic adjustment of the air output, the roof fan cannot quantitatively adjust the air output and monitor the air output in real time; in addition, the roof fan does not have the effect of heat preservation; and its structure is complicated, which not only increases the Production cost, not easy to install and maintain in the future

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