A detection chamber for detecting leakage of a mask

Abstract

The utility model discloses a detection bin for detecting the leakiness of gauze mask, detection bin includes bin body main part, is equipped with detection bin chamber in bin body main part, and the front end of bin body main part is equipped with the bin chamber entrance for the subject to go in and out detection bin chamber, bin door, bin door installs in the front end of bin body main part, is used to open or close bin chamber entrance, door curtain, door curtain installs in the front end inboard of bin body main part, is used for separating detection bin chamber and bin door, door curtain includes mounting seat and multiple curtain pieces, the utility model discloses the door curtain between detection bin chamber and bin door is installed, and the subject is when going in and out detection bin chamber, all are from two adjacent curtain pieces between going in and out, and detection bin chamber and external environment do not exist pressure difference, so the very little of detection bin in simulation agent leak, the very little of concentration reduction, meet the detection environment requirement, need not again to the simulation agent of supplementing into detection bin or just need to supplement the simulation agent little can, thereby has improved detection efficiency greatly.

Description

Technical Field

[0001] This utility model relates to the technical field of testing chambers, and in particular to a testing chamber for detecting leaks in masks. Background Technology

[0002] According to the relevant provisions of the National Standard of the People's Republic of China (GB2626-2019), when conducting leak tests on self-priming filtering particulate respirators, a specified testing system must be used to test the total leakage rate and the leakage rate. The total leakage rate is the ratio of the concentration of the simulated agent leaking into the mask from all mask components, including the filter element, during a subject's inhalation under specified laboratory testing conditions to the concentration of the simulated agent in the external test environment of the respirator mask. The leakage rate is the ratio of the concentration of the simulated agent leaking into the mask from all other mask components, excluding the filter element, during a subject's inhalation under specified laboratory testing conditions to the concentration of the simulated agent in the external test environment of the respirator mask.

[0003] The aforementioned detection system includes a detection chamber; an aerosol generator connected to the upper part of the detection chamber via an airway and a baffle plate, which can uniformly deliver the mimic agent to the top of the detection chamber; an exhaust port installed at the bottom of the detection chamber for discharging the mimic agent from the lower part of the detection chamber; and two particulate matter detectors, one of which is connected to the upper part of the detection chamber via an air pump and a sampling tube for detecting the concentration of the mimic agent in the detection chamber, and the other of which is connected to the front end of the respirator mask via an air pump and a sampling tube for detecting the concentration of the mimic agent in the respirator mask.

[0004] During the testing process, the subject needs to wear a respirator mask and enter the testing chamber. After closing the chamber door, the sampling tube is connected to the respirator mask, and the simulated agent is introduced, the subject needs to complete a series of actions in sequence. Then, the concentration of the simulated agent in the testing chamber and the respirator mask is detected by a particulate matter detector, and the total leakage rate and leakage rate are calculated from the test data.

[0005] However, observations revealed that commercially available testing chambers typically have only one door. Because the testing process requires multiple entries and exits from the chamber, with the door frequently opened and closed, it is extremely easy for a large amount of the simulant to leak out, causing a sharp drop in concentration. This necessitates continuous measurement of the simulant concentration and replenishment of the chamber, resulting in low testing efficiency.

[0006] In view of this, the designer has deeply conceived and actively researched and developed this utility model to address the many shortcomings and inconveniences caused by the imperfections in the design of the above-mentioned testing chamber structure. Utility Model Content

[0007] The purpose of this invention is to provide a detection chamber for detecting leaks in face masks.

[0008] To achieve the above objectives, the solution of this utility model is: A detection chamber for detecting leaks in face masks, the detection chamber comprising: The main body of the chamber contains a testing chamber, and the front end of the main body of the chamber has a chamber entrance for subjects to enter and exit the testing chamber; A door, installed at the front end of the main body of the storage unit, is used to open or close the entrance to the storage unit; A door curtain is installed on the inner front side of the main body of the chamber to separate the testing chamber from the door. The door curtain includes a mounting base and multiple curtain slats. The mounting base is installed on the inner front end of the main body of the chamber and is located at the upper end of the chamber entrance. The upper end of each curtain slat is mounted on the mounting base, and the lower end of each curtain slat hangs down naturally and rests against the bottom surface of the detection chamber. The leftmost curtain slat is sealed and bonded to the main body of the chamber. The remaining curtain slats are arranged in order from left to right, with the left edge of each curtain slat overlapping the inner edge of the previous curtain slat. The rightmost curtain slat is sealed and bonded to the main body of the chamber.

[0009] Preferably, the mounting base is provided with a connection hole, and a connector is fixedly connected to the top end of the curtain slat. The top end of the connector is provided with a snap-fit ​​element, which snaps into the connection hole.

[0010] Preferably, the two adjacent curtain slats are detachably magnetically connected by a magnetic strip.

[0011] Preferably, the door curtain has two slats.

[0012] Preferably, the panels at the front, left, and right ends of the main body of the compartment are made of transparent material.

[0013] Preferably, the bottom of the main body of the container is equipped with four wheels.

[0014] Preferably, the bottom of the main body of the silo is also equipped with four retractable and adjustable foot supports.

[0015] By adopting the above solution, this utility model installs a curtain between the testing chamber and the door. When the subjects enter and exit the testing chamber, they always enter and exit between two adjacent curtain slats. Furthermore, there is no pressure difference between the testing chamber and the external environment. Therefore, the leakage of the simulant in the testing chamber is very small, and the concentration decrease is very small, which meets the requirements of the testing environment. It is not necessary to add simulant to the testing chamber or only a small amount of simulant needs to be added, thereby greatly improving the testing efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the door curtain in a preferred embodiment of the present invention.

[0018] Explanation of key component symbols: In the diagram: 1. Main body of the chamber; 11. Testing chamber; 12. Chamber entrance; 2. Chamber door; 3. Door curtain; 31. Mounting base; 311. Connecting hole; 32. Curtain slats; 321. Connecting piece; 322. Clip-on piece; 4. Wheels; 5. Foot support structure. Detailed Implementation

[0019] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] like Figures 1 to 2 As shown, this is a preferred embodiment of a detection chamber for detecting mask leakage according to the present invention. The detection chamber includes a main body 1, a detection chamber 11 inside the main body 1, and a chamber entrance 12 at the front end of the main body 1 for subjects to enter and exit the detection chamber 11; a door 2, installed at the front end of the main body 1, for opening or closing the chamber entrance 12; and a curtain 3, installed on the inner side of the front end of the main body 1, for separating the detection chamber 11 and the door 2; the curtain 3 includes a mounting base 31 and multiple pieces of material. The curtain slat 32 and the mounting base 31 are installed on the inner front end of the main body 1 of the chamber and located at the upper end of the chamber entrance 12. The upper end of the curtain slat 32 is installed on the mounting base 31, and the lower end of the curtain slat 32 hangs down naturally and abuts against the bottom surface of the detection chamber 11. The left end of the leftmost curtain slat 32 is sealed and bonded to the main body 1 of the chamber. The remaining curtain slats 32 are arranged in order from left to right, with the left edge of the curtain slat 32 overlapping the inner edge of the previous curtain slat 32. The right end of the rightmost curtain slat 32 is sealed and bonded to the main body 1 of the chamber.

[0022] When a subject enters the testing chamber 11, they first open the door 2, then enter the testing chamber 11 between two adjacent curtain slats 32, and then close the door 2. When a subject exits the testing chamber 11, they first open the door 2, then exit the testing chamber 11 between two adjacent curtain slats 32.

[0023] The key feature of this invention is that by installing a curtain 3 between the testing chamber 11 and the door 2, subjects enter and exit the testing chamber 11 through two adjacent curtain slats 32. Furthermore, there is no pressure difference between the testing chamber 11 and the external environment, so the leakage of the simulant inside the testing chamber is very small, and the concentration decrease is very small, which meets the requirements of the testing environment. It is not necessary to add simulant to the testing chamber, or only a small amount of simulant needs to be added, thereby greatly improving the testing efficiency.

[0024] The mounting base 31 is provided with a connecting hole 311. A connector 321 is fixedly connected to the top of the curtain slat 32. A snap-fit ​​322 is provided at the top of the connector 321, and the snap-fit ​​322 snaps into the connecting hole 311. In this way, during production, the mounting base 31 is installed on the main body 1 of the chamber, and the connector 321 is fixedly installed on the top of the curtain slat 32. Thus, when assembling the testing chamber, the curtain slat 32 can be installed on the mounting base 31 by snapping the snap-fit ​​322 into the connecting hole 311, which has the advantage of simple installation.

[0025] The two adjacent slats 32 are detachably magnetically connected by a magnetic strip. This makes the connection between the two adjacent slats 32 more secure and stable.

[0026] The aforementioned curtain 3 is provided with two slats 32. Thus, the two slats 32 are wide enough to cover the entire entrance 12 of the chamber. When in use, the subject only needs to enter and exit between the two slats 32. In this way, it can be avoided that if there are multiple slats 32, other slats 32 may be accidentally opened, leading to leakage of the simulant in the testing chamber.

[0027] The front, left, and right panels of the main body 1 of the aforementioned chamber are made of transparent material. This allows personnel outside to clearly see the situation inside the testing chamber 11, facilitating monitoring of the entire testing process.

[0028] The bottom of the main body 1 of the aforementioned chamber is equipped with four wheels 4. This facilitates the handling and movement of the testing chamber.

[0029] The bottom of the main body 1 of the aforementioned chamber is also equipped with four retractable and adjustable foot supports 5. Thus, after the testing chamber is moved to a fixed position, the lengths of the four foot supports 5 can be adjusted to ensure that the foot supports 5 are not unsupported and detached from the ground, but rather that they serve as load-bearing structures. This allows the foot supports 5 to bear the load instead of the wheels 4, protecting the wheels 4 from damage by excessive external forces and extending the service life of the testing chamber.

[0030] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical applications, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments and various choices and variations of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A detection chamber for detecting leakage in face masks, characterized in that: The testing chamber includes a main body (1), and a testing chamber (11) is provided inside the main body (1). The front end of the main body (1) is provided with a chamber entrance (12) for subjects to enter and exit the testing chamber (11). The door (2) is installed at the front end of the main body (1) of the warehouse and is used to open or close the warehouse entrance (12); A door curtain (3) is installed on the inner front end of the main body (1) of the chamber to separate the testing chamber (11) and the door (2); The door curtain (3) includes a mounting base (31) and multiple curtain slats (32). The mounting base (31) is installed on the inner front end of the main body of the chamber (1) and located at the upper end of the chamber entrance (12). The upper end of the curtain slats (32) is installed on the mounting base (31), and the lower end of the curtain slats (32) hangs down naturally and rests against the bottom surface of the detection chamber (11). The left end of the leftmost curtain slat (32) is sealed and bonded to the main body of the chamber (1). The remaining curtain slats (32) are arranged in order from left to right by overlapping the left edge of the curtain slat (32) with the inner edge of the previous curtain slat (32). The right end of the rightmost curtain slat (32) is sealed and bonded to the main body of the chamber (1).

2. The detection chamber for detecting mask leakage as described in claim 1, characterized in that: The mounting base (31) is provided with a connection hole (311), and the top end of the curtain slat (32) is fixedly connected with a connector (321). The top end of the connector (321) is provided with a snap-fit ​​(322), and the snap-fit ​​(322) snaps into the connection hole (311).

3. The detection chamber for detecting mask leakage as described in claim 1, characterized in that: The two adjacent curtain slats (32) are detachably magnetically connected by magnetic strips.

4. The detection chamber for detecting mask leakage as described in claim 1, characterized in that: The door curtain (3) is provided with two curtain slats (32).

5. A detection chamber for detecting mask leakage as described in claim 1, characterized in that: The front, left and right panels of the main body (1) of the compartment are made of transparent material.

6. The detection chamber for detecting mask leakage as described in claim 1, characterized in that: The bottom of the main body (1) of the container is equipped with four wheels (4).

7. A detection chamber for detecting mask leakage as described in claim 6, characterized in that: The bottom of the main body (1) of the silo is also equipped with four retractable and adjustable foot support structures (5).

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