fan

Abstract

The invention discloses a draught fan. According to the technical scheme, the draught fan is characterized in that the draught fan comprises a machine shell; an air inlet and an air outlet are formed in the machine shell; a rotating mechanism and a fan blade motor driving the rotating mechanism to rotate are arranged inside the machine shell; a heating device used for heating airflow and a heat preservation device are arranged on the machine shell. The heating device used for heating the airflow and the heat preservation device are arranged on the machine shell in order to meet the requirements of different using occasions. By arranging the heating device, the airflow can be heated, and then it can be ensured that the airflow blown out through an air blower has a certain temperature, so that the using requirements of the different occasions are met. By arranging the heat preservation device, the dissipation of heat generated by the heating device can be avoided, so that the loss of energy is avoided.

Description

technical field [0001] The present invention relates to a ventilating device, more particularly, it relates to a fan. Background technique [0002] Fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and induction of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances ; Drying and selection of grain; Wind tunnel wind source and inflation and propulsion of hovercraft, etc. The working principle of the fan is basically the same as that of the turbo compressor, but because the gas flow rate is low and the pressure changes little, it is generally not necessary to consider the change of the gas specific volume, that is, the gas is treated as an incompressible fluid. [0003] In order to solve the above technical problems, the invention with the application number of 201510617072.5 provides a fan. The center of the side of ...

AI Technical Summary

Problems solved by technology

[0004] However, in actual use, due to changes in production and technology, it is necessary to frequently adjust the flow, pressure, and temperature of the gas. The air blown by the fan needs to have a certain temperature, which requires the fan to have certain heating and heat preservation functions. Some fans have a very simple casing structure, which cannot heat the airflow passing through the fan, and has limited functions; in addition, in actual use, the blades are vulnerable parts, the structure of the blades is very simple, and the blades are very prone to wear and tear. Lifespan is not high

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