Air inlet and outlet structure of a detection device

Abstract

The utility model discloses an intake and exhaust structure of detection device, including equipment shell, the inside of equipment shell is provided with air pump and detection unit, and the air pump is connected with the intake pipe, and the air pump is connected with the detection unit through the connecting pipe, and the detection unit is connected with the air outlet pipe, and the detachable first filter screen is installed in the intake pipe, and the throttle plate is installed in the connecting pipe, and the second filter screen is installed in the air outlet pipe. In the implementation of the device, the air pump inhales the air outside, the first filter screen can filter the inhaled air, avoid the impurity in the air into the equipment shell, the use of throttle plate can make the airflow that enters the detection unit more stable, and the use of second filter screen can avoid the impurity in the air outside entering the air outlet pipe when the device is not used, and further ensure that the air circulation pipeline in the device is more clean.

Description

Technical Field

[0001] This utility model belongs to the field of detection device technology, specifically an air inlet and outlet structure for a detection device. Background Technology

[0002] Gas detection devices need to continuously draw in air when detecting gases (e.g., portable gas detectors have different types of sensors, such as electrochemical sensors, catalytic combustion sensors, and infrared sensors, which generate electrical signal changes in response to specific gases; the instrument analyzes these electrical signals to determine the gas composition and concentration). However, air carries some impurities. In existing technologies, most filters are installed using a fixed structure, which leads to a buildup of impurities on the filters after prolonged use, making cleaning difficult. Furthermore, the outlet pipe is mostly an open structure, allowing impurities in the air to enter the device when it is not in use, causing contamination. To address this issue, this application proposes an air inlet and outlet structure for the detection device. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, this utility model provides an air inlet and outlet structure for a detection device, which effectively solves the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an air inlet and outlet structure for a detection device, comprising a device housing, an air pump and a detection unit disposed inside the device housing, an air inlet pipe connected to the air pump, the air pump and the detection unit being connected via a connecting pipe, an air outlet pipe connected to the detection unit, a removable first filter screen installed inside the air inlet pipe, a throttling plate installed inside the connecting pipe, and a second filter screen installed inside the air outlet pipe.

[0005] Preferably, the first filter screen is fixed inside the outer frame, a sealing layer is provided on the surface of the outer frame, and a magnet is provided inside the sealing layer. The outer frame is connected to the equipment shell through the magnet.

[0006] Preferably, the throttling plate has a plurality of uniformly arranged through holes.

[0007] Preferably, a rotating plate is provided on the side of the second filter screen near the detection unit, and a rotating shaft is fixedly connected to the end of the rotating plate, with a torsion spring sleeved on the rotating shaft.

[0008] Preferably, the inside of the air outlet pipe is provided with a stepped surface, and the side of the rotating plate closest to the detection unit is attached to the stepped surface so that the rotating plate can only rotate to one side.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] When this device is in operation, the air pump draws in outside air. The first filter filters the air to prevent impurities from entering the device housing. The use of the throttling plate makes the airflow into the detection unit more stable. The use of the second filter prevents outside air from carrying impurities into the air outlet pipe when the device is not in use, thus ensuring that the air circulation pipes inside the device are cleaner. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram of the overall internal structure of this utility model;

[0013] Figure 2 This is a schematic diagram of one side of the external frame structure of this utility model;

[0014] Figure 3 This is a schematic diagram of one side of the throttling plate of this utility model;

[0015] Figure 4 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1. Equipment casing; 2. Air pump; 3. Detection unit; 4. Air inlet pipe; 5. Connecting pipe; 6. Air outlet pipe; 7. Frame; 8. Throttling plate; 9. First filter screen; 10. Magnet; 11. Rotating plate; 12. Second filter screen; 13. Torsion spring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] Depend on Figure 1-4The present invention discloses an air intake and exhaust structure for a detection device, comprising a device housing 1, wherein an air pump 2 and a detection unit 3 are disposed inside the device housing 1, an air intake pipe 4 is connected to the air pump 2, the air pump 2 and the detection unit 3 are connected by a connecting pipe 5, an exhaust pipe 6 is connected to the detection unit 3, a removable first filter 9 is installed in the air intake pipe 4, a throttling plate 8 is installed in the connecting pipe 5, and a second filter 12 is installed in the exhaust pipe 6.

[0019] When this device is in operation, the air pump 2 draws in outside air. The first filter 9 filters the air to prevent impurities from entering the device housing 1. The use of the throttling plate 8 makes the airflow into the detection unit more stable. The use of the second filter 12 prevents outside air from carrying impurities into the air outlet pipe 6 when the device is not in use, thus ensuring that the air circulation pipes in the device are cleaner.

[0020] The first filter screen 9 is fixed inside the outer frame 7. A sealing layer is provided on the surface of the outer frame 7 to avoid gaps between the outer frame 7 and the equipment shell 1. A magnet 10 is provided inside the sealing layer. The attraction of the magnet 10 facilitates the installation of the outer frame 7. The outer frame 7 is connected to the equipment shell 1 through the magnet 10 so that the first filter screen 9 can be disassembled and cleaned after long-term use.

[0021] The throttling plate 8 has several evenly arranged through holes. When air flows to the throttling plate 8, the throttling plate 8 can block it, and some air passes through the through holes to pass through the throttling plate 8, thereby preventing the air from directly contacting the detection unit 3 and playing a certain buffering role.

[0022] The second filter screen 12 is provided with a rotating plate 11 on the side near the detection unit 3. A rotating shaft is fixed to the end of the rotating plate 11, and a torsion spring 13 is sleeved on the rotating shaft.

[0023] The air outlet pipe 6 has a stepped surface inside, and the rotating plate 11 is attached to the stepped surface on the side close to the detection unit 3 so that the rotating plate 11 can only rotate to one side.

[0024] The use of the rotating plate 11 further prevents outside air from contacting the detection unit 3 through the air outlet pipe 6, thereby preventing external impurities from entering the air inlet pipe 6.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention 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 the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air inlet and outlet structure of a detection device, comprising a device housing (1), characterized in that: The equipment housing (1) is equipped with an air pump (2) and a detection unit (3). An air inlet pipe (4) is connected to the air pump (2). The air pump (2) and the detection unit (3) are connected by a connecting pipe (5). An air outlet pipe (6) is connected to the detection unit (3). A removable first filter screen (9) is installed in the air inlet pipe (4). A throttling plate (8) is installed in the connecting pipe (5). A second filter screen (12) is installed in the air outlet pipe (6).

2. The air inlet and outlet structure of a detection device according to claim 1, characterized in that: The first filter screen (9) is fixed inside the outer frame (7). A sealing layer is provided on the surface of the outer frame (7), and a magnet (10) is provided inside the sealing layer. The outer frame (7) is connected to the equipment shell (1) through the magnet (10).

3. The air inlet and outlet structure of the detection device according to claim 1, characterized in that: The throttling plate (8) has several evenly arranged through holes.

4. The air inlet and outlet structure of the detection device according to claim 1, characterized in that: The second filter screen (12) has a rotating plate (11) on the side near the detection unit (3). The end of the rotating plate (11) is fixed with a rotating shaft, and the rotating shaft is covered with a torsion spring (13).

5. The air inlet and outlet structure of the detection device according to claim 1, characterized in that: The air outlet pipe (6) has a stepped surface inside. The rotating plate (11) is attached to the step surface on the side close to the detection unit (3) so that the rotating plate (11) can only rotate to one side.

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