JP2863843B1 - Absorption can with breakthrough detection device for protective mask - Google Patents

Abstract

The present invention provides an absorption can with a breakthrough detection device for a protective mask having a device for easily and accurately detecting the absorption capacity of the absorption can without increasing the volume of the absorption can. SOLUTION: This absorption can is provided with a breakthrough detection device for a protective mask including a filter portion 2 and an absorption portion 3, wherein the absorption portion 3 is provided with a sampling path 5 separate from an intake path.
One end of the passage 5 is provided substantially on the central axis of the absorbent section 3 to serve as a sampling port, and the other end is provided with a coupler 8 for connecting to a sensor installed outside the absorption can. Absorption can with breakthrough detection device for protective mask.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent can for a protective mask, and more particularly to an absorbent can with a breakthrough detecting device for detecting a decrease in the absorption capacity of the absorbent can.

[0002]

2. Description of the Related Art A protective mask, such as a gas mask, is provided with an absorbing can for absorbing harmful substances in environmental air at the face opening. The absorbent can comprises an outer filter and an inner absorbent portion filled with an absorbent such as carbon.

[0003] When the ambient air passes through the filter, dust in the air is removed. Then, when passing through the absorbent portion, the toxic gas in the ambient air is absorbed, and the air from which these harmful substances have been removed is worn. Supplied to the person.

However, if this protective mask is used for a long period of time, the gas absorbing capacity of the absorbing can gradually decreases, and finally the absorbing capacity of the absorbing can is lost, resulting in a dangerous state.

[0005] Therefore, the absorption capacity of a used can has been detected by various methods. For example, manage the mass of the absorbent, detect the absorption capacity by its weight change,
Alternatively, the absorbent portion is divided into two layers, and an object such as a sensor is inserted into an intermediate portion for detection.

However, in the former case in which the absorption capacity is detected based on the change in weight of the absorbent, if the temperature and humidity in the environment are different, the amount of water absorbed by the absorbent is different, and the change in weight of the absorbent is Since it differs depending on the use environment, it could not be detected accurately. Further, in the management based on the change in weight, it was necessary to remove the absorbent can from the mask in order to know the decrease in the absorption capacity. In the latter case, there is a drawback that the absorption can is inevitably large because the sensor is inserted.

[0007]

The inventors of the present invention have improved the above drawbacks and have conducted various studies on an absorbent can provided with a device capable of easily and accurately detecting the absorption capacity. As a result, the present invention has been completed. SUMMARY OF THE INVENTION It is an object of the present invention to provide a protective mask absorbent can having a device for easily and accurately detecting the absorbent capacity of the absorbent can while using the mask by using the mask without increasing the volume of the absorbent can. I do.

[0008]

SUMMARY OF THE INVENTION The gist of the present invention is an absorbent can with a breakthrough detection device for a protective mask comprising a filter portion and an absorbent portion, wherein the absorbent portion is provided separately from an intake path. A sampling passage is provided, one end of the passage is provided substantially on the central axis of the absorbent section, and a sampling port is provided, and the other end is provided with a coupler for connecting to a sensor installed outside the absorption can. It is an absorption can with a breakthrough detection device for a protective mask.

That is, in the present invention, a sampling passage separate from the intake air is provided for the air passing through the absorber, and a decrease in the absorption capacity of the absorber is detected by the air passing through the passage. The increase in volume and mass can be reduced to allow accurate detection.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a protective mask for a protective mask according to the present invention.
FIG. 1 is a side view of a partial cross section of an absorption can with a breakthrough detection device of the present invention, and FIG. 2 is a side view of the breakthrough detection device.

In the drawing, a can body 1 which forms the base of an absorption can
Is divided into a front (outer side) and a rear side (face body side) by the partition 4. A filter section 2 is provided at the front (outside) and an absorbent section 3 is provided at the rear (face body side). The absorbent section 3 contains activated carbon as an absorbent.

In addition, the absorbent section 3 is provided with a sampling passage 5 separately from an absorption path as a connecting portion with the face body. The sampling passage 5 has one end on the intake side 6 on the central axis of the absorbent section 3 and forms a sampling port, and the other end on the exhaust side 7 has the can 1 (absorbent section 3). )
Which leads to the outside. The intake side end 6 is provided with a sub-filter 11 for preventing absorption of the absorbent into the intake side end 6 if necessary, and the exhaust side end 7 has a built-in check valve. A coupler 8 is provided.

As shown in FIG. 2, the breakthrough detecting device has a tube 9 connected thereto, and a distal end thereof connected to a coupler 8 provided at an exhaust end 7 of the sampling passage 5. Is provided.

When measuring the absorption capacity of the absorbent can, a plug 10 at the tip of a tube 9 connected to a breakthrough detection device is connected to the coupler 8.

In a state where the coupler 8 and the plug 10 are connected as described above, when the ambient air is sucked from the outside of the absorbing can, the environmental air passes through the filter section 2 and subsequently passes through the absorbent section 3. . Part of the transmitted air passes through the sub-filter 11 and passes through the sampling passage 5 and the tube 9.
, Reaches the breakthrough detection device, and detects a decrease (breakthrough) in the absorption capacity of the absorbent can by analyzing the permeated air.

When the breakthrough detecting device is not used,
The absorbent can is attached to the protective mask while the coupler 8 is still used.

The sampling passage 5 provided in the absorption mask of the protective mask according to the present invention has a diameter of 2 to 8 mm.
mm is preferable, and one end thereof is disposed at a position of about 1 to 10 mm on the central axis of the absorbent section 3 to collect air transmitted through the absorbent can. Also, the other end of the sampling passage 5 is taken out of the absorption can, and a coupler 8 is attached to this, and a tube led from the breakthrough detection device is connected.

[0018]

As described above, in the present invention,
Since the air passing through the absorption can is sampled in a different path from the intake air, the increase in the volume and mass of the absorption can itself can be reduced as much as possible, and the breakthrough detection device also has measurement accuracy. Can be improved.
Then, it is possible to easily and accurately detect the absorption capacity of the absorbent can while wearing and using the mask without increasing the volume of the absorbent can.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of an absorption can with a breakthrough detection device for a protective mask according to the present invention.

FIG. 2 is a side view of the breakthrough detection device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Can body, 2 ... Filter part, 3 ... Absorbent part, 4 ... Separator,
Reference numeral 5: sampling passage, 6: intake end, 7: exhaust end, 8: coupler, 9: tube for breakthrough detection device, 10
... plug, 11 ... sub-filter.

Claims (1)

(57) [Claims] 1. An absorption can with a breakthrough detection device for a protective mask comprising a filter section and an absorbent section, wherein the absorbent section has a sampling passage separate from an intake path, and one end of the passage. Is provided on a substantially central axis of the absorbent section as a sampling port, and the other end is provided with a coupler for connecting to a sensor installed outside the absorption can. Absorption can with detector.