Atmosphere sampling device

Abstract

The utility model discloses an atmosphere sampling device. The atmosphere sampling device comprises a ventilation mechanism and a filtering mechanism, the ventilation mechanism comprises a shell, a negative pressure fan is fixedly installed on the outer side of the shell, an air inlet of the negative pressure fan communicates with the interior of the shell, and the side, away from the negative pressure fan, of the shell is sleeved with an air inlet hopper in a threaded mode. The filtering mechanism comprises a filtering frame and a ring body fixedly embedded in the inner wall of the shell, inserting rods are symmetrically and fixedly connected to the outer side of the ring body, and an empty groove is formed in one side of each inserting rod; according to the atmosphere sampling device, through the arrangement of the ventilation mechanism and the filtering mechanism, a filter frame can drive an insertion rod to penetrate through a through groove after being attached to a ring body, so that a movable stop block can move out of an empty groove under the action of a limiting spring and fix the filter frame and a disposable filter membrane; in addition, the filter frame and the disposable filter membrane can be conveniently detached, washed and detected by pressing the movable check block into the empty slot; through the arrangement, the stability of the filter frame after installation is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of atmospheric sampling technology, specifically to an atmospheric sampling device. Background Technology

[0002] As is well known, atmospheric sampling refers to the method of collecting samples of pollutants or polluted air from the atmosphere. Atmospheric sampling devices are widely used in atmospheric environmental monitoring, health and epidemic prevention, occupational safety and health, scientific research and other units. Patent CN221445555U, published on the China Patent Network, discloses an atmospheric sampling device, including a base. The top of the base has a slot that engages with a subbase. A fan head is fixedly connected to the top of the base, and a housing is engaged with the top of the fan head. A filter mechanism is engaged with the top of the housing. The filter mechanism includes a fixed plate and a connecting plate fixedly connected to the bottom of the fixed plate. A circular filter frame is engaged with the bottom of the connecting plate, and a disposable filter membrane is fixedly installed inside the circular filter frame. A bracket is fixedly connected to the top of the inner wall of the base, and a motor is fixedly installed on the bracket. An impeller is fixedly connected to the output end of the motor. This invention, an atmospheric sampling device, uses bladeless fan technology to enhance airflow, improve detection speed and efficiency, consumes less energy, and reduces costs. It achieves atmospheric sampling by filtering the passing air through a disposable filter membrane that is easy to disassemble and replace, making the sampling method simple and convenient.

[0003] However, in existing atmospheric sampling devices, the disposable filter membrane used to detect the dust particle content in the air is mainly fixed by a circular filter frame and a connecting plate. This fixing method is not stable enough and is prone to falling off during use. Therefore, an atmospheric sampling device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an atmospheric sampling device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an atmospheric sampling device, comprising: a ventilation mechanism and a filtration mechanism;

[0006] The ventilation mechanism includes a housing, a negative pressure fan is fixedly installed on the outside of the housing, the air inlet of the negative pressure fan is connected to the inside of the housing, and an air inlet hopper is threaded onto the side of the housing away from the negative pressure fan.

[0007] The filtration mechanism includes a filter frame and a ring fixedly embedded in the inner wall of the housing. A rod is symmetrically fixedly connected to the outer side of the ring. A slot is opened on one side of the rod. A limit spring is fixedly connected to the inner wall of the slot. A movable stop is fixedly connected to one end of the limit spring. The movable stop is movably disposed inside the slot. A through slot is symmetrically opened on the top of the filter frame for the rod to pass through. A disposable filter membrane is fixedly embedded inside the filter frame.

[0008] Preferably, the air outlet of the negative pressure fan is connected to an air outlet pipe.

[0009] Preferably, a connecting block is fixedly fitted on the outer side of the housing, and a handle is hinged to one side of the connecting block.

[0010] Preferably, the handle is fitted with a rubber sleeve.

[0011] Preferably, one side of the connecting block is threadedly connected to a bolt via a support plate, and one side of the handle has a threaded hole for screwing the bolt in.

[0012] Preferably, a switch is fixedly installed on the outside of the housing, and the electrical control output terminal of the switch is electrically connected to the electrical control input terminal of the negative pressure fan.

[0013] Preferably, a vertical sliding groove is provided on the inner side of the empty groove, and both sides of the movable stop are slidably connected to the inner wall of the sliding groove by sliders.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] This atmospheric sampling device, through the design of a ventilation mechanism and a filtration mechanism, allows the filter frame to be attached to the ring body, enabling the insertion rod to pass through the through slot. This allows the movable stop block to move out of the empty slot under the action of the limit spring, thus fixing the filter frame and disposable filter membrane. Furthermore, pressing the movable stop block into the empty slot facilitates the disassembly, cleaning, and inspection of the filter frame and disposable filter membrane. Through these design features, the stability of the filter frame after installation is effectively improved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the atmospheric sampling device of this utility model;

[0017] Figure 2 This is an enlarged view of area A of the structural schematic diagram of the atmospheric sampling device of this utility model;

[0018] Figure 3 This is a schematic diagram of the ventilation mechanism in the atmospheric sampling device of this utility model;

[0019] Figure 4This is an enlarged view of section B of the ventilation mechanism structure diagram in the atmospheric sampling device of this utility model.

[0020] In the diagram: 1. Ventilation mechanism; 10. Housing; 11. Negative pressure fan; 12. Inlet hopper; 13. Outlet pipe; 14. Connecting block; 15. Handle; 16. Rubber sleeve; 17. Switch; 18. Support plate; 19. Bolt; 2. Filtering mechanism; 20. Ring body; 21. Filter frame; 22. Through groove; 23. Disposable filter membrane; 24. Insert rod; 25. Empty groove; 251. Slide groove; 26. Limiting spring; 27. Movable stop block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This utility model provides a technical solution: an atmospheric sampling device, comprising: a ventilation mechanism 1 and a filtration mechanism 2.

[0023] In one embodiment, in order for external air to enter the housing 10 through the air inlet 12 after the negative pressure fan 11 is started, and the air inlet 12 can be installed and removed from the housing 10; the ventilation mechanism 1 includes the housing 10, the negative pressure fan 11 is fixedly installed on the outside of the housing 10, the air inlet of the negative pressure fan 11 is connected to the inside of the housing 10, and the air inlet 12 is threadedly fitted on the side of the housing 10 away from the negative pressure fan 11; in order to facilitate the exhaust of air inside the housing 10, the air outlet of the negative pressure fan 11 is connected to the air outlet pipe 13.

[0024] In one embodiment, in order for the filter frame 21 to be attached to the ring 20 so that the insertion rod 24 can pass through the through hole, thereby allowing the movable stop 27 to be squeezed into the slot 25, and when the movable stop 27 extends out of the through hole, it can move out of the slot 25 under the tension of the limiting spring 26, thereby allowing the filter frame 21 to be pressed against the ring 20, so that the air entering the housing 10 can retain the dust particles it carries on the disposable filter membrane 23, thereby allowing the filter frame 21 and the disposable filter membrane 23 to be pressed into the slot 25 by pressing the movable stop 27 into the slot 25. 3. Disassemble for testing; The filter mechanism 2 includes a filter frame 21 and a ring 20 fixedly embedded in the inner wall of the housing 10. A rod 24 is symmetrically fixedly connected to the outer side of the ring 20. A slot 25 is opened on one side of the rod 24. A limit spring 26 is fixedly connected to the inner side wall of the slot 25. A movable stop 27 is fixedly connected to one end of the limit spring 26. The movable stop 27 is movably set inside the slot 25. A through slot 22 is symmetrically opened on the top of the filter frame 21 for the rod 24 to pass through. A disposable filter membrane 23 is fixedly embedded inside the filter frame 21.

[0025] In one embodiment, to facilitate hand operation of the housing 10 and folding of the handle 15, a connecting block 14 is fixedly fitted on the outer side of the housing 10, and a handle 15 is hinged to one side of the connecting block 14; to improve the stability when using the handle 15, a rubber sleeve 16 is fixedly fitted on the handle 15; in order to position the handle 15 by screwing the bolt 19 into the threaded hole, so that the handle 15 can be stably kept perpendicular to the housing 10 when in use, a bolt 19 is threadedly connected to one side of the connecting block 14 through a support plate 18, and a threaded hole for screwing the bolt 19 is provided on one side of the handle 15.

[0026] In one embodiment, in order to facilitate the control of the operating status of the negative pressure fan 11, a switch 17 is fixedly installed on the outside of the housing 10, and the electrical control output terminal of the switch 17 is electrically connected to the electrical control input terminal of the negative pressure fan 11.

[0027] In one embodiment, in order for the movable stop 27 to maintain a smooth linear movement under the action of the limiting spring 26, thereby increasing the pressing force of the movable stop 27 against the filter frame 21, a vertical slide groove 251 is provided on the inner side of the slot 25, and both sides of the movable stop 27 are slidably connected to the inner side wall of the slide groove 251 by sliders.

[0028] Based on the above technical solution, the working steps of this solution are summarized as follows: In use, after the filter frame 21 is attached to the ring 20, it can drive the insertion rod 24 through the through hole, so that the movable stop 27 can be squeezed into the empty groove 25. When the movable stop 27 extends out of the through hole, it can move out of the empty groove 25 under the tension of the limit spring 26, so that the filter frame 21 can be pressed against the ring 20. After the negative pressure fan 11 is started, the external air can enter the housing 10 through the air inlet 12, so that the air entering the housing 10 can retain the dust particles it carries on the disposable filter membrane 23. Therefore, after disassembling the air inlet 12, the filter frame 21 and the disposable filter membrane 23 can be removed for testing by pressing the movable stop 27 into the empty groove 25.

[0029] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An atmospheric sampling device, characterized by, The utility model relates to a kind of air ventilation mechanism and filter mechanism. The air ventilation mechanism includes a housing (10) having a negative pressure fan (11) fixedly installed on the outer side thereof, with the air inlet of the negative pressure fan (11) being in communication with the inside of the housing (10). The housing (10) is threadedly sleeved with an air inlet hopper (12) on the side away from the negative pressure fan (11). The filter mechanism (2) includes a filter frame (21) and a ring body (20) fixedly embedded on the inner wall of the housing (10). The outer side of the ring body (20) is symmetrically fixedly connected with a plug rod (24). The plug rod (24) is provided with an empty slot (25) on one side thereof. The inner side wall of the empty slot (25) is fixedly connected with a limiting spring (26). One end of the limiting spring (26) is fixedly connected with a movable stop block (27). The movable stop block (27) is movably arranged in the empty slot (25). The top of the filter frame (21) is symmetrically provided with a through slot (22) for allowing the plug rod (24) to penetrate therethrough. The inside of the filter frame (21) is fixedly embedded with a disposable filter membrane (23). The air outlet of the negative pressure fan (11) is in communication with an air outlet pipe (13).

2. An atmospheric sampling device according to claim 1, characterised in that: The outer side of the housing (10) is fixedly sleeved with a connecting block (14). The connecting block (14) is hingedly connected with a handle (15) on one side thereof.

3. An atmospheric sampling device according to claim 1, characterized in that: The handle (15) is fixedly sleeved with a rubber sleeve (16).

4. An atmospheric sampling device according to claim 3, characterised in that: The connecting block (14) is threadedly connected with a bolt (19) on one side thereof through a supporting plate (18). The handle (15) is provided with a threaded hole on one side thereof for allowing the bolt (19) to be screwed in.

5. An atmospheric sampling device according to claim 4, characterised in that: The outer side of the housing (10) is fixedly installed with a switch (17). The electric control output end of the switch (17) is electrically connected with the electric control input end of the negative pressure fan (11).

6. An atmospheric sampling device according to claim 3, wherein: The inside of the empty slot (25) is provided with a vertical sliding groove (251). The two sides of the movable stop block (27) are slidably connected with the inner side wall of the sliding groove (251).

7. An atmospheric sampling device according to claim 1, wherein: ​

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