Ventilation device and method of controlling the same

Abstract

A ventilation device having fans and filters, which, even if the filters clog, minimizes occurrence of overloaded operation of the fans and maintains reduction in the amount of ventilation as minimumas possible. The ventilation device (1) has the fans (4, 5), the filters (6, 7) for capturing dust etc. contained in an air flow generated by the fans (4, 5), and a control section (8) for increasinga target speed (ns) of the fans (4, 5) at a predetermined frequency by using a time input value (ts) for causing an informing section (9) to issue a filter sign.

Description

technical field [0001] The present invention relates to a ventilator and a control method thereof, and more particularly to a ventilator including a blower fan and a filter for capturing dust and the like contained in an air flow generated by the blower fan, and a control method thereof. Background technique [0002] In buildings such as airtight houses, a ventilator including a blower fan and a filter for capturing dust and the like contained in the air flow generated by the blower fan is often installed. Furthermore, in such a building, it is desirable to secure the necessary minimum number of air changes from the viewpoint of the air quality in the building. However, when ventilation is performed, the heat loss of the building increases, so the temperature in the building changes, impairing comfort, or the operating load of the cooling and heating equipment increases. Therefore, in the ventilation system of a building, it is desirable to keep the ventilation quantity con...

AI Technical Summary

Problems solved by technology

[0005] When the ventilation device installed in the building is operated, the ventilation resistance increases due to dust and the like adhering to the filter. Therefore, if the rotation speed of the blower fan is controlled at a fixed target rotation speed, the ventilation at the initial stage of operation cannot be maintained. Gas volume, the reduction of the ventilation volume occurs, and the problem that the ventilation volume cannot be maintained at a certain level with the necessary ventilation volume occurs.

[0006] In this regard, similar to the air blower in Patent Document 1, a control structure is considered to increase the operating frequency of the blower fan according to the increase in the clogging degree of the filter. The frequency of operation continues to increase, so the supply fan may be overloaded, which is not ideal

In addition, regarding the frequency of increasing the target rotational speed of the blower fan, it is necessary to consider the fact that the degree of increase in the clogging degree of the filter varies depending on the environment in which the ventilator is used, and the determination is not easy.

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