Air recycling device for auxiliary respiration apparatus

Abstract

An air recycling device for auxiliary respiration apparatus has a casing, an air gather assembly, a valve assembly and a pressure switch unit. The casing has a regulator connector and an air feeder. The air gather assembly communicates with the casing. The valve assembly selectively blocks the communication either between the air feeder and the air gather assembly or between the regulator connector and the air feeder. In the moment between inhaling and exhaling, the pressure switch unit drives the valve assembly to block the communication between the air feeder and the regulator connector to gather the air expired from the user into the air gather assembly. When the user inhales again, the user inhales the air in the air gather assembly. The subsequently expired air flows through the regulator connector to a diving regulator. The air expired by the diver is recycled.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an air recycling device for auxiliary respiration apparatus, and more particularly to an air recycling device that recycles expired air for user to inhale again so the air tank can be used longer.[0003]2. Description of Related Art[0004]Beach actions are popular with people in summer time, especially diving. Diving could be snorkeling or scuba diving. Snorkeling is an action of swimming at the surface of water so an air tank is not required. Scuba diving is an action of swimming underwater so divers must carry air tanks.[0005]The air tank stores high pressure air and supplies the air to the diver with a diving regulator. The diving regulator is used to regulate the pressure of the air in the air tank to allow the diver breathing as usual on land. A diving regulator comprises a first stage and a second stage. The first stage communicates with the air tank. The second stage connects to a m...

AI Technical Summary

Benefits of technology

[0009]The main objective of the invention is to provide an air recycling device for auxiliary respiration apparatus that recycles expired air for user to inhale again so the available duration of the air tank will be extended.

[0010]The air recycling device in accordance with the present invention comprises a casing, an air gather assembly, a valve assembly and a pressure switch unit. The casing has a regulator connector and an air feeder. The air gather assembly communicates with the casing. The valve assembly selectively blocks the communication either between the air feeder and the air gather assembly or between the regulator connector and the air feeder. In the moment between inhaling and exhaling, the pressure switch unit drives the valve assembly to block the communication between the air feeder and the regulator connector to gather the air expired from the user into the air gather assembly. When the user inhales again, the user inhales the air in the air gather assembly. The subsequently expired air flows through the regulator connector to a diving regulator. Because the air expired by the diver is recycled, the consumption of the air in the air tank is reduced. Available duration of the air tank will be extended.

Problems solved by technology

Because the diver requires the same quantity of oxygen gas, the remaining oxygen gas will be wasted and the utility rate of the oxygen gas is low.

Furthermore, firemen use the similar auxiliary respiration apparatus, and the utility rate of the oxygen gas is also low even though the percentage of air of the oxygen gas does not vary in the scene of a fire.

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