PID sensor structure

Abstract

According to the PID sensor structure provided by the utility model, through a mode that the screen plate is connected in the accommodating groove on the inner side wall of the top of the shell in a buckling manner, the problems that in the prior art, when the screen plate is in threaded connection with the shell, no reliable positioning part exists, rotation is easy to occur, press-type tight fit connection and press-type buckling connection are difficult to open, and the operation is inconvenient are solved. And prying marks are left on the screen plate. When the screen plate is installed, only one side of the screen plate needs to be inclined and partially inserted into the containing groove, the other side of the screen plate is slightly pressed by a thumb, so that the edge of the screen plate completely slides into the containing groove, and when the screen plate is taken down from the shell, only a simple tool needs to be inserted into the notch in the edge of the screen plate and gently prized upwards, and the screen plate can be taken down from the shell. The screen plate can be taken down by using the elastic deformation of the screen plate, the disassembly and assembly mode is simple, the operation is easy, and when the screen plate of the PID sensor structure needs to be regularly opened to maintain the ultraviolet lamp and the signal detector of the PID sensor, the maintenance efficiency can be improved, and the maintenance cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of gas sensor technology, and in particular to a PID sensor structure. Background Technology

[0002] PID (Photo Ionization Detectors) sensors are professional sensors for detecting VOCs (Volatile Organic Compounds) in the environmental protection and industrial safety fields. They offer advantages such as small size, fast response speed, high accuracy, and continuous measurement capability. They can detect VOCs and other toxic and harmful gases from extremely low concentrations of 1 ppb to high concentrations of 20,000 ppm. Currently, PID sensors are widely used in the detection of various organic chemicals, playing a particularly important role in disaster area accident leak detection, accident area confirmation, and leak substance identification.

[0003] The lamp holder, UV lamp, and signal detector constitute the core components of a PID sensor. As the sensor is used over time, impurities accumulate on the surface of the signal detector and UV lamp, causing performance degradation. Therefore, PID sensors require periodic opening of the mesh plate on top to maintain key internal components and ensure they remain in good working order. Common connection methods between the mesh plate and the sensor housing include threaded connections, press-fit connections, and press-clamp connections. Threaded connections require continuous rotation during connection, which can cause friction between internal parts and the mesh plate, leading to rotation of unreliable components. Press-fit and press-clamp connections are difficult to open, often leaving pry marks on the mesh plate, affecting the sensor's appearance. Furthermore, existing connection methods slow down the maintenance of the internal UV lamp and signal detector, thus impacting maintenance efficiency and increasing costs. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a PID sensor structure to solve the problems in the prior art where the mesh plate and the sensor housing are connected by threads and there are no reliably positioned parts that are prone to rotation, the pressing tight fit connection and the pressing snap connection are difficult to open and leave pry marks on the mesh plate, and the connection method of the mesh plate and the sensor housing in the prior art affects the maintenance efficiency of the ultraviolet lamp and signal detector of the PID sensor and increases the maintenance cost.

[0005] To achieve the above and other related objectives, this utility model provides a PID sensor structure, which includes: a housing, an elastically deformable mesh plate, a PID sensor housed within the housing, a circuit board connected to an external circuit, and a pin connector.

[0006] A receiving groove is provided on the inner sidewall of the top of the housing;

[0007] The mesh panel is divided into a breathable area and a receiving area. The receiving area is located outside the breathable area. The breathable area is provided with a number of breathable holes, and the outer peripheral edge of the receiving area is provided with at least one notch.

[0008] The receiving area of ​​the mesh plate is snapped into the receiving groove of the housing to achieve electrical connection between the mesh plate and the housing.

[0009] Optionally, the cross-sectional shape of the mesh plate is the same as the cross-sectional shape of the receiving groove.

[0010] Furthermore, the shell is a cylindrical structure, the mesh plate has a circular cross-section, and the accommodating groove has an annular cross-section.

[0011] Furthermore, the cross-sectional dimension of the mesh plate is larger than the inner diameter of the receiving groove and smaller than or equal to the outer diameter of the receiving groove.

[0012] Optionally, the thickness of the mesh plate is not greater than the depth of the receiving groove.

[0013] Optionally, a plurality of the vent holes are evenly distributed on the ventilated area.

[0014] Optionally, the outer peripheral edge of the receiving area is provided with at least two notches, and all the notches are evenly distributed circumferentially.

[0015] Furthermore, the outer periphery of the accommodating area is provided with three notches.

[0016] Optionally, the materials of the housing and the mesh plate include metal.

[0017] Optionally, an insulating sealing layer is provided at the bottom of the housing, which achieves airtightness at the bottom of the housing.

[0018] As described above, the PID sensor structure of this utility model has the following beneficial effects: The PID sensor structure of this utility model solves the problems of existing technologies where the mesh plate is not reliably positioned when connected to the shell via a snap-fit ​​connection, leading to easy rotation of parts, difficulty in opening press-fit and snap-fit ​​connections, and leaving pry marks on the mesh plate. When installing the mesh plate, this utility model only requires tilting one side of the mesh plate and partially inserting it into the receiving groove, then gently pressing the other side of the mesh plate with your thumb to slide its entire edge into the receiving groove. To remove the mesh plate from the shell, simply insert a simple tool into the notch on the edge of the mesh plate and gently pry it upwards, utilizing the elastic deformation of the mesh plate itself. Its assembly and disassembly methods are simple and easy to operate. When periodically opening the mesh plate of the PID sensor structure for maintenance of the PID sensor's UV lamp and signal detector, it can improve maintenance efficiency and reduce maintenance costs.

[0019] Furthermore, compared to the threaded connection, press-fit connection, and press-buckle connection of the mesh plate and the shell in the prior art, this embodiment does not use any additional connecting parts between the shell and the mesh plate. This helps to get rid of some constraints in machining, meet some special shape and structural requirements of the shell, and simplify the process and reduce costs. At the same time, the PID sensor structure is very complex and has a very crowded internal space. In the prior art, the connecting parts used to press the mesh plate will occupy a certain thickness space in the height direction of the PID sensor. Since no additional connecting parts are used between the shell and the mesh plate in this embodiment, it is beneficial to reduce the utilization of the effective internal space of the PID sensor. Attached Figure Description

[0020] Figure 1 The diagram shown is a schematic of the mesh plate of the PID sensor structure of this utility model.

[0021] Figure 2 The diagram shown is a schematic of the housing of the PID sensor structure of this utility model.

[0022] Figure 3 The diagram shown is a schematic of the PID sensor structure of this utility model.

[0023] Figure 4 The diagram shows the circuit board and pin connector at the bottom of the PID sensor structure of this utility model.

[0024] Component designation explanation

[0025] 1. Mesh plate

[0026] 11 ventilation holes

[0027] 12 gaps

[0028] 13 Breathable areas

[0029] 14. Accommodation Area

[0030] 2. Shell

[0031] 21 Receiving groove

[0032] 3 Circuit Board

[0033] 31 Pin Connector Detailed Implementation

[0034] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0035] Please see Figures 1 to 4 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0036] like Figures 1 to 4 As shown, this utility model provides a PID sensor structure, which includes: a housing 2, an elastically deformable mesh plate 1, a PID sensor housed in the housing, a circuit board 3 connected to an external circuit, and a pin connector 31.

[0037] like Figure 2 As shown, a receiving groove 21 is provided on the inner sidewall of the top of the housing 2;

[0038] like Figure 1 As shown, the mesh plate 1 is divided into a breathable area 13 and a receiving area 14. The receiving area 14 is located outside the breathable area 13. The breathable area 13 is provided with a plurality of breathable holes 11. The outer peripheral edge of the receiving area 14 is provided with at least one notch 12.

[0039] like Figure 3As shown, the receiving area 14 of the mesh plate 1 is snapped into the receiving groove 21 of the housing 2 to achieve electrical connection between the mesh plate 1 and the housing 2.

[0040] This embodiment of the PID sensor structure uses a mesh plate snap-fit ​​connection to a recessed area on the inner sidewall of the top of the housing. This solves the problems of existing technologies where the mesh plate and housing are threaded together, making it easy for parts without reliable positioning to rotate, and the press-fit and snap-fit ​​connections are difficult to open, leaving pry marks on the mesh plate. When installing the mesh plate, simply tilt one side and partially insert it into the recessed area. Gently press the other side of the mesh plate with your thumb to slide its entire edge into the recessed area. To remove the mesh plate from the housing, simply insert a simple tool into the notch on the edge of the mesh plate and gently pry it upwards. The mesh plate can be removed using its own elastic deformation. This simple and easy-to-operate method improves maintenance efficiency and reduces maintenance costs when periodically opening the mesh plate of the PID sensor structure for maintenance of the PID sensor's UV lamp and signal detector.

[0041] Furthermore, compared to the threaded connection, press-fit connection, and press-buckle connection methods used in existing technologies for the mesh plate and housing, the PID sensor structure in this embodiment does not use any additional connecting parts between the housing and the mesh plate. This helps to overcome some constraints in machining, meet some special shape and structural requirements of the housing, and simplify the process and reduce costs. At the same time, due to the complexity of the PID sensor structure and its very congested internal space, the connecting parts used to press the mesh plate in existing technologies occupy a certain thickness space in the height direction of the PID sensor structure. Since no additional connecting parts are used between the housing and the mesh plate in this embodiment, it helps to reduce the utilization of the effective internal space of the PID sensor structure.

[0042] As an example, the thickness of the mesh plate 1 is not greater than the depth of the receiving groove 21, so that the mesh plate 1 can be snapped into the receiving groove 21. It should be noted that the depth of the receiving groove 21 refers to the distance of the receiving groove 21 in the height direction of the housing 2.

[0043] As an example, the cross-sectional shape of the mesh plate 1 is the same as the cross-sectional shape of the receiving groove 21. Further, the cross-sectional dimension of the mesh plate 1 is larger than the inner diameter of the receiving groove 21 and less than or equal to the outer diameter of the receiving groove 21, so that the mesh plate 1 can be snapped into the receiving groove 21. Preferably, the cross-sectional dimension of the mesh plate 1 matches the outer diameter of the receiving groove 21, thereby making the mesh plate 1 more securely snapped into the receiving groove 21 and less prone to shaking. Furthermore, the shape of the housing 2 of the PID sensor structure can be selected according to different application scenarios, such as... Figures 1 to 4 As shown, in this embodiment, for ease of manufacturing and installation standards, a cylindrical structure is preferred. The cross-section of the mesh plate 1 is circular, and the cross-section of the accommodating groove 21 is annular.

[0044] The mesh plate 1 is divided into a breathable area 13 and a receiving area 14. The receiving area 14 is located around the breathable area 13. The breathable area 13 is provided with a plurality of breathable holes 11. The gas to be detected from the outside can enter the PID sensor structure through the plurality of breathable holes 11 for detection. As an example, Figure 1 As shown, the number of vent holes 11 can be set according to actual needs and is not limited here. Several vent holes 11 are evenly distributed on the venting area 13 so that the gas to be detected can enter the interior of the PID sensor structure more evenly, making the detection results more accurate.

[0045] The outer periphery of the receiving area 14 is provided with at least one notch 12. As an example, the outer periphery of the receiving area 14 is provided with at least two notches 12, and all the notches 12 are evenly distributed circumferentially, so that when the mesh plate 1 is disassembled multiple times, it can be pried open at different notches 12 randomly. After multiple disassemblies of the mesh plate 1, the various parts of the mesh plate 1 are less prone to deformation and damage due to uniform stress. Figure 1 As shown, this embodiment uses the example of setting three notches 12 on the outer periphery of the accommodating area 14 for illustration.

[0046] As an example, such as Figure 1 As shown, the shapes of the vent 11 and the notch 12 can be set according to actual needs, and are not limited here. In this embodiment, the vent 11 is circular and the notch 12 is arc-shaped as an example for illustration.

[0047] The notch 12 is used to insert the tool to pry open the mesh plate 1 from the housing 2, making disassembly simpler and less likely to leave pry marks on the mesh plate 1, affecting the appearance of the PID sensor. The tool can be, for example, a SIM card ejector tool for mobile phones.

[0048] As an example, the housing 2 and the mesh plate 1 can be made of metal. After the housing 2 and the mesh plate 1 are installed, they can be electrically connected, thereby enabling the housing 2 and the mesh plate 1 of the PID sensor structure to shield the PID sensor from electromagnetic interference.

[0049] The mesh plate 1 is a plate-shaped planar structure. As an example, depending on the shape and density of the vent holes 11, the mesh plate 1 can be flexibly manufactured using processing methods including but not limited to stamping, etching or laser processing to improve production efficiency.

[0050] As an example, an insulating sealing layer is provided at the bottom of the housing 2. This insulating sealing layer seals the air passage at the bottom of the housing 2, which helps maintain the accuracy and stability of the PID sensor and increases the mechanical stability of the PID sensor. This allows the PID sensor to better resist vibration and shock, improving its durability in harsh environments. The insulating sealing layer can be formed using techniques including, but not limited to, epoxy resin encapsulation, silicone rubber encapsulation, or polyurethane encapsulation. In this embodiment, epoxy resin encapsulation is preferred because the epoxy resin encapsulation material has high transmittance to ultraviolet light, thus not affecting the detection performance of the PID sensor.

[0051] In summary, the PID sensor structure provided by this utility model includes a housing, an elastically deformable mesh plate, a PID sensor housed within the housing, a circuit board connected to an external circuit, and a pin connector. A receiving groove is provided on the inner sidewall of the top of the housing. The mesh plate is divided into a venting area and a receiving area, with the receiving area located outside the venting area. The venting area has several vent holes, and the outer periphery of the receiving area has at least one notch. The receiving area of ​​the mesh plate is snapped into the receiving groove of the housing to achieve electrical connection between the mesh plate and the housing. Due to the different connection method, this solves the problem of unreliable connection between the mesh plate and the housing in the prior art. The components in the slot are prone to rotation, and the press-fit and press-buckle connections are difficult to open, leaving pry marks on the mesh plate. The PID sensor structure provided by this utility model solves this problem by simply tilting one side of the mesh plate and partially inserting it into the receiving groove when installing the mesh plate, and then gently pressing the other side of the mesh plate with your thumb to slide its entire edge into the receiving groove. When removing the mesh plate from the housing, simply insert a simple tool into the notch on the edge of the mesh plate and gently pry it upwards. The mesh plate can be removed by utilizing its own elastic deformation. The disassembly and assembly method is simple and easy to operate. When it is necessary to periodically open the mesh plate of the PID sensor structure to maintain the UV lamp and signal detector of the PID sensor, it can improve maintenance efficiency and reduce maintenance costs.

[0052] Furthermore, compared to the threaded connection, press-fit connection, and press-buckle connection methods used in existing technologies for connecting the mesh plate and the housing, this embodiment does not use any additional connecting parts between the housing and the mesh plate. This helps to overcome some constraints in machining, meet some special shape and structural requirements of the housing, and simplify the process and reduce costs. At the same time, due to the complex structure of the PID sensor, the internal space is very congested. In existing technologies, the connecting parts used to press the mesh plate occupy a certain thickness space in the height direction of the PID sensor. Since this embodiment does not use any additional connecting parts between the housing and the mesh plate, it helps to reduce the utilization of the effective internal space of the PID sensor. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0053] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A PID sensor structure, characterized in that, The PID sensor structure includes: a housing, an elastically deformable mesh plate, a PID sensor housed within the housing, a circuit board connected to an external circuit, and a pin connector. A receiving groove is provided on the inner sidewall of the top of the housing; The mesh panel is divided into a breathable area and a receiving area. The receiving area is located outside the breathable area. The breathable area is provided with a number of breathable holes, and the outer peripheral edge of the receiving area is provided with at least one notch. The receiving area of ​​the mesh plate is snapped into the receiving groove of the housing to achieve electrical connection between the mesh plate and the housing.

2. The PID sensor structure according to claim 1, characterized in that: The cross-sectional shape of the mesh plate is the same as the cross-sectional shape of the accommodating groove.

3. The PID sensor structure according to claim 2, characterized in that: The shell is a cylindrical structure, the mesh plate has a circular cross-section, and the accommodating groove has an annular cross-section.

4. The PID sensor structure according to claim 3, characterized in that: The cross-sectional dimension of the mesh plate is larger than the inner diameter of the receiving groove and smaller than or equal to the outer diameter of the receiving groove.

5. The PID sensor structure according to claim 1, characterized in that: The thickness of the mesh plate is not greater than the depth of the accommodating groove.

6. The PID sensor structure according to claim 1, characterized in that: Several of the ventilation holes are evenly distributed on the ventilation area.

7. The PID sensor structure according to claim 1, characterized in that: The outer periphery of the accommodating area is provided with at least two notches, and all the notches are evenly distributed circumferentially.

8. The PID sensor structure according to claim 7, characterized in that: The outer periphery of the accommodating area is provided with three notches.

9. The PID sensor structure according to claim 1, characterized in that: The materials of the shell and the mesh plate include metal.

10. The PID sensor structure according to claim 1, characterized in that: An insulating sealing layer is provided at the bottom of the housing, which achieves air passage sealing at the bottom of the housing.

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