Press double-structure water bottle extraction part backflow prevention valve

Abstract

This item is an extraction device that is one of the components of a pressed water bottle, as shown in "Reference Figure 1 Showing the State of Use". The extraction device is composed of a filter part and a backflow prevention valve part. The extraction device is attached to the bottom of the inner tube of a pressed double-structure water bottle consisting of an outer tube and an inner tube, as shown in "Reference Figure 2 Showing the State of Use". After attachment, the inner tube is inserted into the outer tube part of the pressed double-structure water bottle for use. The extraction device attached to the bottom of the inner tube of this application consists of a filter part (red part) located at the bottom of the extraction device and a backflow prevention valve (part other than red) located above it, and the backflow prevention valve has the function of blocking the top of the filter part after hot water is held in the inner tube, and has the function of preventing hot water in the inner tube from flowing back through the filter part into the outer tube. Specifically, as shown in the "Reference diagram showing the backflow check valve before and after it moves," the backflow check valve used in the extraction device is positioned so that when the inner tube is inserted into the outer tube of the pressed double-walled water bottle, a gap is created between the filter part and the backflow check valve so that hot and cold water can be introduced into the inner tube (upper part of the reference diagram), but after the inner tube is inserted into the outer tube, it blocks the filter part (lower part of the reference diagram). Thus, in this application, the backflow check valve, which is a partial design of the extraction device for the pressed double-walled water bottle, is positioned above the filter part, and is a dynamic design that changes to create and block a gap above the filter part.

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