CN2734262Y - Sealed circulating air breathing device - Google Patents

Abstract

The utility model discloses a sealed circulating air breathing device, including an isolation hood, an oxygen supplier and a breathing mask, wherein the front and side of the breathing mask are each provided with a one-way valve, and the outside of the side one-way valve is provided with a filter medium. When in use, the breathing mask is worn, the isolation hood is covered on the head, and the oxygen supplier is turned on, so that a high oxygen chamber is formed in the isolation hood. When in use, the breathing device of the utility model can be well isolated from the outside world, protecting the user's head, and can be applied to various places with harsh environments. Since the filter medium has a good adsorption effect on the exhaled gas, the oxygen in the chamber can maintain a high concentration, ensuring the safety of the user, and the structure is simple and easy to use.

Description

Sealed cycle air breathing device

technical field

The utility model relates to a breathing device, in particular to a sealed circulating gas breathing device.

Background technique

Personnel who work in dusty or harmful gas environments, and those who escape in a fire, usually must wear respiratory protection devices. Current breathing devices are usually divided into two categories: one is filter type respiratory protection device, which can filter Remove harmful gases and dust in the air, and make people inhale the purified air. The disadvantage of this type of device is that when the oxygen content in the air is low, the user is prone to hypoxia, which endangers life safety. The other is a semi-closed rebreathing device. This type of device has its own oxygen generator, which is usually large in size and inconvenient to carry. In addition, the oxygen loss is large, the use time is short, the cost is expensive, the application range is small, and it is not easy to promote. .

Contents of the invention

The utility model discloses a sealed circulating gas breathing device, which adopts a sealed design, avoids direct contact between harmful gas or dust and the user's head, better protects the life safety of the user, has simple structure, is light and comfortable, and is easy to operate. Convenient and easy to promote.

The breathing device of the utility model mainly includes an isolation hood, an oxygen supplier and a breathing mask, each of which has a one-way valve on the front and side of the breathing mask, and a filter medium outside the side one-way valve. When in use, the breathing mask is worn Well, put the isolation hood on the head, turn on the oxygen supplier, and the oxygen will fill the isolation hood to form a high oxygen chamber. The user inhales the oxygen in the chamber through the one-way valve on the side of the mask, and the exhaled gas passes through the front When inhaling again, the gas in the chamber is filtered and adsorbed by the medium and then sucked into the body again through the side one-way valve. Since the carbon dioxide gas exhaled in the chamber is effectively absorbed by the filter medium, the oxygen in the chamber can be absorbed. Keep a higher concentration all the time, so that the purpose of sealed cycle breathing is achieved.

The breathing device of the utility model is well isolated from the outside world when in use and protects the user's head. It can be applied to various places with harsh environments. Due to the good adsorption and filtration of the medium, the oxygen in the warehouse can maintain a relatively high concentration, ensuring The utility model has the advantages of safety for users, simple structure and convenient use.

Description of drawings

Fig. 1 is a schematic diagram of application of the utility model sealed circulating air breathing device.

Fig. 2 is a principle flow chart of the utility model sealed circulating air breathing device.

Detailed ways

As shown in Figure 1, the breathing apparatus of the present utility model mainly comprises an isolation hood 1, an oxygen supply device 6 and a breathing mask 2, an exhalation one-way valve 3 at the front of the breathing mask 2, and an inspiratory one-way valve on the side 4. There is a filter medium 5 around the one-way valve 4. When in use, put on the breathing mask 2, cover the isolation hood 1 on the head, open the oxygen supplier 6 in the isolation hood 1, and then the oxygen will fill the isolation hood , to form a high oxygen chamber, combined with schematic diagram 2, the user inhales the oxygen in the chamber into the human body 7 through the inspiratory one-way valve 4 on the side of the mask, and the exhaled gas is discharged into the chamber through the exhalation one-way valve 3 at the front When inhaling again, the gas in the chamber is filtered and adsorbed by the medium 5, and then sucked into the body again through the side suction one-way valve 4, and the oxygen in the isolation hood 1 keeps a higher concentration, so that the purpose of the sealed cycle breathing is achieved.

Claims (2)

1, a kind of sealed circulating air breathing equipment device is characterized in that: comprise

One Isolation head hood (1),-----cover on head;

One breathing mask (2),-----front portion is provided with an expiratory one-way valve (3), and there is a breather cheek valve (4) side, and check valve (4) has filter medium (5) on every side; Filter medium is the effective material of absorbing carbon dioxide.

One oxygen supplier (6),-----oxygen being provided, oxygen can be charged in the Isolation head hood (1) when opening.

2, sealed circulating air breathing equipment as claimed in claim 1 is characterized in that: filter medium is a soda lime.

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