Ventilation check valve for bathrooms and toilets

Abstract

A check valve for bathrooms and toilets to improve air ventilation and prevent insects and viruses from entering the bathrooms and toilets includes an elbow duct which has an inlet end on one side communicating with a ventilation vent, and a cylinder extended outwards from the inlet end to couple with a padding on the inner rim. There is an outlet end on other end of the elbow duct positioned in a diagonal and upper manner relative to the cylinder. The elbow duct has an inclined side on the bottom. The inclined side has an upper end bent to form a conical cavity. The elbow duct houses a ball which may roll automatically on the inclined side to close the ventilation vent. When air is dispelled through the ventilation vent, airflow pushes the ball to the conical cavity to form a passage in the elbow duct.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a ventilation check valve for bathrooms and toilets and particularly to a check valve for improving air ventilation of bathrooms and toilets and fending off virus and insects that has an elbow duct with a sloped side in the interior the hold a ball which can roll when pushed by airflow to form a passage and slide to automatically close an air ventilation vent when the air ventilation stops. BACKGROUND OF THE INVENTION [0002] With the population density getting higher and higher in every country, urbanization is a growing trend around the world. These days more and more people are living in the city. Because of the land supply is limited, group residences such as apartments and condominiums have replaced the single houses and bungalows to become the mainstream of the housing market. Some builders, in order to enlarge the visible living quarters to impress customers, often pay less attention on the bathroom and toilet. Som...

AI Technical Summary

Benefits of technology

[0006] In view of the aforesaid disadvantages, the present invention aims to provide a check valve to improve air ventilation of bathrooms and toilets that is adaptable to varying air ventilation conditions of the bathrooms and toilets and environmental conditions to dispel foul smell in the bathrooms and toilets, and improve air ventilation.

[0007] Another object of the invention is to provide a filter on an outlet end of the check valve to prevent insets or external articles from entering through the passage of the check valve, or clogging the passage.

[0008] The check valve according to the invention includes an elbow duct which has a sloped side and a ball located on the sloped side movable under airflow to a conical cavity to form a passage. When air ventilation stops, the ball automatically slides on the sloped side to close a ventilation vent to prevent external air from entering the bathroom and toilet thereby to improve air ventilation of the bathroom and toilet.

Problems solved by technology

Some even compromise the minimum requirements of the bathroom and toilet.

As a result, accidents occurred in the bathroom and toilet have grown in recent years and being frequently reported.

And the bathroom and toilet often are damp and musty.

People easily slips and falls down.

Suffering from toxic monoxide frequently happens.

All this is attributable to the poor air ventilation of the bathroom and toilet.

While it can dispel the indoor air outside, it also draws outside filthy or foul air indoors.

The virus breeds easily in the room and causes hazards.

It does not improve air ventilation very much, but breeds virus easily.

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