A mobile sampling device with air purification function

Abstract

The application discloses a mobile sampling device with air purification function, which comprises a box body, a first filter plate, a fan, a second filter plate, a flow guide plate, a flow distribution plate and a working area arranged in the box body, and a return air channel arranged at the lower part of the box body and communicated with the working area and the area where the first filter plate is located, so that the air flowing through the working area can return to the area where the first filter plate is located along a predetermined path and participate in the purification cycle again, thereby forming a complete circulating purification air path in the device, which is beneficial to improving the recycling degree of the air in the device and reducing the dependence on the continuous supplement of external air. Since the return air has a lower particulate matter load than the untreated external air, the proportion of the first filter plate in treating high-load external air can be reduced, the burden of the front-stage filtration is relieved to a certain extent, and the stability of the circulating purification during continuous operation of the device is improved.

Description

Technical Field

[0001] This application relates to the field of purification and gas filtration technology, and in particular to a mobile sampling device with air purification function. Background Technology

[0002] In scenarios requiring localized clean environments, such as pharmaceuticals, biopharmaceuticals, food processing, and fine chemicals, sampling, temporary storage, transportation, and short-term open-circuit operations typically need to be conducted in a controlled air environment to minimize the adverse effects of external particulate matter and suspended impurities. While existing mobile sampling devices with air purification functions can achieve some purification through filtration and air supply, the air flowing through the working area is often directly discharged outside the device, or an effective return air circulation path that coordinates with the front-end filtration area is not formed.

[0003] In this situation, to maintain the required air volume and cleanliness in the work area, the equipment typically needs to continuously introduce a significant amount of outside air for purification. On the one hand, the load of particulate matter, dust, and impurities in the outside air is relatively high, and a continuous large-scale introduction will place the pre-filter components under a high processing burden for a long time, which is not conducive to the stable operation of the equipment under continuous operation. On the other hand, the air used in the work area does not form a complete return air reuse path inside the equipment, which will also cause insufficient continuity of the circulating airflow inside the equipment. This will make the maintenance of the local clean environment more dependent on external air supply, which is not conducive to improving the adaptability of the equipment to local clean work scenarios and the economic efficiency of its use.

[0004] Therefore, how to construct a relatively complete internal return air circulation path in mobile sampling equipment so that the air used in the work area can flow back and participate in the purification process again, thereby reducing the dependence on the continuous introduction of outside air and improving the stability of continuous operation, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this application is to provide a mobile sampling device with air purification function, which solves the technical problems of existing technologies such as failure to construct a complete internal return air circulation path, high dependence on the introduction of external air, and insufficient stability in continuous operation.

[0006] To solve the above problems, this application adopts the following technical solution: A mobile sampling device with air purification function includes a housing, a first filter plate is provided on the side of the housing, and a fan, a second filter plate, a guide plate, a diffuser plate and a working area are arranged sequentially in the airflow circulation direction inside the housing. The fan is disposed between the first filter plate and the second filter plate, and the guide plate is disposed between the second filter plate and the diffuser plate. The diffuser plate is used to guide the airflow purified by the second filter plate into the working area to form clean airflow. The lower part of the housing is provided with a return air duct, the working area is connected to the return air duct, and the return air duct is connected to the area where the first filter plate is located, so as to form a circulating purified airflow.

[0007] Furthermore, the first filter plate is disposed in the air inlet side area of ​​the housing, the second filter plate is disposed in the air outlet side area of ​​the fan, and the fan is mounted on a fan frame disposed inside the housing; wherein the filtration accuracy of the first filter plate is lower than that of the second filter plate.

[0008] Furthermore, it also includes a return air filter plate, wherein the diffuser plate and the return air filter plate are respectively disposed on opposite sides of the working area, one end of the return air channel is connected to the return air filter plate, and the other end is connected to the area where the first filter plate is located.

[0009] Furthermore, the guide plate is inclinedly disposed between the second filter plate and the diffuser plate, with one end of the guide plate connected to the second filter plate and the other end connected to the diffuser plate, so that a continuous flow path is formed between the air outlet side of the second filter plate and the air inlet side of the diffuser plate.

[0010] Furthermore, the length direction of the guide plate is consistent with or parallel to the length direction of the second filter plate, and the guide plate is arranged between the second filter plate and the diffuser plate along the length direction of the second filter plate; the width of the guide plate is smaller than the corresponding width of the second filter plate, and it is located in the middle area between the second filter plate and the diffuser plate, so that the area corresponding to the guide plate constitutes the main flow area, and the two sides of the guide plate form an auxiliary transition area between the second filter plate and the diffuser plate.

[0011] Furthermore, the guide plate is provided with a plurality of guide holes penetrating its thickness direction. The diameter and / or the unit area opening ratio of the guide holes located in the projection area of ​​the fan outlet axis on the guide plate are smaller than the diameter and / or the unit area opening ratio of the guide holes located in the extension areas on both sides of the projection area.

[0012] Furthermore, both sides of the guide plate are provided with side edges extending along the length of the guide plate. After the side edges are connected with the surface of the guide plate, they together form a groove-shaped guide boundary, which is used to limit the lateral diffusion of the airflow on the outlet side of the second filter plate on both sides of the guide plate.

[0013] Furthermore, the housing is equipped with a PAO test port, a differential pressure gauge, and a control panel. The PAO test port is connected to the air supply area where the second filter plate is located. The differential pressure gauge is connected to both sides of the first filter plate and / or the second filter plate. The control panel is located on the outside of the housing.

[0014] Furthermore, the control panel is electrically connected to a buzzer and an emergency stop switch, which are located on the outer surface of the enclosure to provide audible and visual alerts and emergency power-off control in case of equipment malfunction.

[0015] Furthermore, the bottom of the housing is provided with multiple casters, including omnidirectional casters, and at least some of the casters are provided with a braking structure to enable the mobile sampling device to have movement and positioning functions.

[0016] Compared with the prior art, this application has the following beneficial effects: This application incorporates a first filter plate, a fan, a second filter plate, a guide plate, a diffuser plate, and a working area within a housing. A return air channel, connected to the working area and the area containing the first filter plate, is located at the bottom of the housing. This allows air flowing through the working area to return along a predetermined path to the area containing the first filter plate and participate in the purification cycle again, thus forming a relatively complete circulating purification air path within the equipment. Compared to existing technologies where air used in the working area is directly discharged or insufficiently recycled, this application improves the degree of air circulation within the equipment and reduces dependence on continuous external air supply. Since the return air has a lower particulate load than untreated external air, it helps reduce the proportion of high-load external air processed by the first filter plate, alleviating the burden on the pre-filter to some extent and improving the stability of the circulating purification during continuous operation. Simultaneously, the guide plate and diffuser plate guide and rectify the airflow before it enters the working area, improving the continuity and stability of the clean airflow coverage within the working area. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0019] Figure 1 A schematic diagram of the overall structure of a mobile sampling device with air purification function; Figure 2A schematic diagram of the working area in a mobile sampling device with air purification function; Figure 3 A cross-sectional structural diagram of a mobile sampling device with air purification function; Figure 4 for Figure 3 A schematic diagram of the structure at point A; Figure 5 This is a schematic diagram of the return air duct in a mobile sampling device with air purification function.

[0020] Illustration: 1. Housing; 12. PAO test port; 13. Differential pressure gauge; 14. Control panel; 15. Buzzer; 16. Emergency stop switch; 17. Working area; 18. Return air duct; 2. First filter plate; 3. Fan; 4. Second filter plate; 5. Guide plate; 51. Guide hole; 52. Side edge; 6. Diffuser; 7. Return air filter plate. Detailed Implementation

[0021] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0023] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] refer to Figures 1 to 5This application provides a mobile sampling device with air purification function, including a housing 1. A first filter plate 2 is provided on one side of the housing 1. Inside the housing 1, along the airflow circulation direction, a fan 3, a second filter plate 4, a guide plate 5, a diffuser plate 6, and a working area 17 are arranged sequentially. The fan 3 is disposed between the first filter plate 2 and the second filter plate 4. The guide plate 5 is disposed between the second filter plate 4 and the diffuser plate 6. The diffuser plate 6 is used to guide the airflow purified by the second filter plate 4 into the working area to form a clean airflow. A return air channel 18 is provided at the bottom of the housing 1. The working area 17 is connected to the return air channel 18, and the return air channel 18 is connected to the area where the first filter plate 2 is located to form a circulating purified airflow. In this embodiment, the housing 1 is a relatively enclosed airflow carrying space, serving to support, contain, and isolate the air. Inside the housing 1, along the airflow circulation direction, are arranged sequentially a first filter plate 2, a fan 3, a second filter plate 4, a guide plate 5, a diffuser plate 6, and a working area 17. The sequential arrangement along the airflow circulation direction means that when the equipment is working, the air inside the housing 1 passes through the above-mentioned components in sequence according to a preset flow path, thereby completing the entire process of air return, preliminary filtration, air supply pressurization, further purification, airflow guidance and transition, diffuser rectification, and entry into the working area 17. Specifically, the first filter plate 2 is located in the front section of the airflow circulation path, which mainly corresponds to the first filtration position when entering the purification path. It can pre-treat larger particles, some dust, or other impurities carried in the air, thereby reducing the load on subsequent components. It can be located on one side of the housing 1 to communicate with the outside air, that is, when the outside air enters the housing 1 through the air inlet on this side, it first passes through the preliminary filtration of the first filter plate 2. The fan 3 is positioned between the first filter plate 2 and the second filter plate 4. The fan 3 is located in the middle position after the initial filtration and before the further purification, so that the air drawn in by the fan 3 has already been pre-filtered by the first filter plate 2. This reduces the possibility of impurities directly entering the fan 3 and causing dust accumulation, wear, or reduced efficiency of the impeller. At the same time, the airflow output by the fan 3 can be directly transported to the area where the second filter plate 4 is located, so that it can pass through the second filter plate 4 under pressure. The first filter plate 2, the fan 3, and the second filter plate 4 form a sequentially connected air supply and purification passage, wherein the first filter plate 2 is located on the air inlet side of the fan 3, and the second filter plate 4 is located on the air outlet side of the fan 3.

[0025] In this embodiment, the second filter plate 4 is positioned after the fan 3. Its function is to further purify the air propelled by the fan 3, and the second filter plate 4 undertakes a higher level of purification. After passing through the second filter plate 4, the cleanliness of the air is further improved. At this time, the air first enters the transition area between the second filter plate 4 and the diffuser plate 6, and is guided by the guide plate 5 in this transition area. In other words, the guide plate 5 is positioned between the second filter plate 4 and the diffuser plate 6 to reorganize the airflow within the space-constrained housing 1. Since the internal dimensions of the housing 1 are usually quite compact, if the air directly rushes into the working area 17 after secondary purification, it is easy for the flow velocity to be too high, the flow direction to be unstable, or the coverage to be uneven in some areas. The guide plate 5 is positioned between the air outlet side of the second filter plate 4 and the air inlet side of the diffuser plate 6 to create a controlled guiding transition path, so that the purified airflow can be transformed from a relatively concentrated air supply state to an orderly airflow state that is more suitable for entering the working area 17.

[0026] Furthermore, the diffuser 6 is positioned after the guide plate 5 and adjacent to the working area 17. The diffuser 6 guides the airflow purified by the second filter plate 4 and transitioned by the guide plate 5 into the working area 17 to form a clean airflow. The clean airflow refers to the relatively stable, continuous, and suitable flow pattern for covering the working area when the purified air enters the working area 17. The diffuser 6 transforms the relatively concentrated and directional airflow into a more dispersed and uniform outflow state before it finally enters the working area 17, thereby facilitating the establishment of a local clean protection environment within the working area 17. The working area 17 is the space where the equipment directly undertakes sampling, transfer, temporary storage, or other clean operations. Since the air has passed through the first filter plate 2, fan 3, second filter plate 4, guide plate 5, and diffuser 6 in sequence before reaching this area, the air received by the working area 17 is not chaotic air, but clean airflow that has been filtered, transported, transitioned, and rectified. This layered design allows the working area 17 to be in a better clean protection state.

[0027] In this embodiment, a return air duct 18 is provided at the lower part of the housing 1, and the working area 17 is connected to the return air duct 18. The return air duct 18 is also connected to the area where the first filter plate 2 is located, thus forming a closed-loop circulating purification air path. That is to say, when the clean airflow enters the working area 17 through the diffuser plate 6 and completes the coverage of the area, the air will not be lost in a disorderly manner. Instead, it will converge downward or to the side along a predetermined path inside the housing 1 and enter the return air duct 18. Then, it will flow back to the area where the first filter plate 2 is located through the return air duct 18. On this basis, it will re-enter the air supply purification path formed by the first filter plate 2, the fan 3, and the second filter plate 4, forming a circulating purification process of return air, preliminary filtration, air supply by the fan 3, further purification, air diversion and transition, diffused airflow into the working area 17, and then return air again, thereby improving the stability of the equipment under continuous operation conditions.

[0028] In one specific embodiment, when the mobile sampling device is running, after the fan 3 starts, it first creates a negative pressure suction and positive pressure delivery effect inside the housing 1. The air outside the device is initially filtered by the first filter plate 2, and then sucked in by the fan 3 located behind it and compressed to the second filter plate 4. After the air is further purified by the second filter plate 4, it enters the transition area between the second filter plate 4 and the diffuser plate 6. In this area, the guide plate 5 guides the airflow and limits its path, so that the air will not diffuse randomly in a short distance, but will transition to the front of the diffuser plate 6 along a relatively continuous and controlled route. After the air is diffused and rectified by the diffuser plate 6, it enters the working area 17 in a way that is more suitable for covering the working area, thereby forming a relatively stable clean airflow protective layer in the working area 17. After the airflow has completed the coverage of the working area 17, it enters the return air channel 18 and returns to the area where the first filter plate 2 is located, and so on. This application achieves air purification, and through the continuous arrangement of the guide plate 5 and the diffuser plate 6, the purified airflow has better transition stability and organization before entering the working area 17. Simultaneously, a continuous circulating purification path is formed by the return air duct 18, resulting in more continuous, stable, and balanced clean airflow coverage within the working area 17. For scenarios requiring sampling, transfer, or short-term open-circuit operations in a localized clean environment, this device can create a controlled clean working space within its own housing 1 without relying on large, fixed cleanroom facilities. It should be understood that, without departing from the technical concept defined in this application, those skilled in the art can make appropriate adjustments to the shape of the housing 1, the component installation method, and the specific dimensional proportions of the relative positions of each component. However, as long as the basic connection relationship and circulating airflow working principle between the first filter plate 2, the fan 3, the second filter plate 4, the guide plate 5, the diffuser plate 6, the working area 17, and the return air duct 18 are maintained, all such adjustments should fall within the protection scope of this application.

[0029] In one embodiment, the first filter plate 2 is disposed in the air inlet side region of the housing 1, the second filter plate 4 is disposed in the air outlet side region of the fan 3, and the fan 3 is mounted on a fan 3 frame disposed inside the housing 1; wherein the filtration accuracy of the first filter plate 2 is lower than that of the second filter plate 4.

[0030] In this embodiment, the area where the first filter plate 2 is located can be connected to the external environment, allowing external air to enter the housing 1 through the first filter plate 2. This enables the equipment to not only process the internal circulating air during operation but also to draw in external air and perform preliminary filtration. In other words, the location of the first filter plate 2 corresponds to the filtration area at the equipment's air inlet. This area can be directly or indirectly connected to the external environment, allowing external air to undergo pre-treatment by passing through the first filter plate 2 before entering the housing 1. Therefore, the first filter plate 2 not only intercepts larger particles in the internal recirculating air but also pre-filters the air entering the equipment from the outside, thereby reducing the direct entry of larger particles, dust, or other impurities from the external air into the subsequent purification system inside the housing 1. When the equipment is operating, external air can enter the housing 1 through the first filter plate 2 and be drawn in under the negative pressure suction of the fan 3. Simultaneously, some air in the working area 17 or inside the housing 1 can also participate in the overall flow during system operation. Therefore, the air processed by the fan 3 can actually be a combined airflow of external supplementary air and internal flowing air. Since the first filter plate 2 is located on the air inlet side of the fan 3 and can exchange with the outside air, it is equivalent to the pre-stage inlet filter unit of the internal air purification chain of the equipment. It first filters the air entering the system and then introduces the pre-filtered air into the fan 3. The fan 3 will not directly suck in untreated outside air, thereby reducing the pollution and wear of impurities on the components of the fan 3 and making the airflow output by the fan 3 have better basic cleanliness. Subsequently, the air driven by the fan 3 passes through the second filter plate 4 before entering the working area 17. The fan 3 is located between the front and rear filter plates, so that the power output of the equipment is connected with the purification chain, preventing unfiltered air from directly entering the subsequent fine filtration section or directly acting on the working area 17.

[0031] In one embodiment, a return air filter plate 7 is also included. The diffuser plate 6 and the return air filter plate 7 are respectively disposed on opposite sides of the working area 17. One end of the return air channel 18 is connected to the return air filter plate 7, and the other end is connected to the area where the first filter plate 2 is located.

[0032] In this embodiment, the diffuser 6 is located on one side of the working area 17, and its function is to deliver the purified air, which has undergone a flow transition, into the working area 17. The return air filter 7 is located on the other side of the working area 17. That is, after the air has covered the working area 17, it passes through the return air filter 7 in a predetermined direction and enters the return air channel 18. The working area 17 becomes an effective airflow space between the supply air side and the return air side. After the airflow enters the working area 17 from the diffuser 6, it flows in a predetermined direction to the return air filter 7 and returns to the return air channel 18 through the plate, thereby making the airflow in the working area 17 more defined and stable. One end of the return air channel 18 is connected to the return air filter 7, and the other end is connected to the area where the first filter 2 is located. That is, the recovered air does not terminate at a certain local cavity, but continues to return to the starting area of ​​the previous purification path, thus forming a complete circulating purification structure together with the first filter 2, the fan 3, and the second filter 4.

[0033] In one embodiment, the guide plate 5 is inclinedly disposed between the second filter plate 4 and the diffuser plate 6. One end of the guide plate 5 is connected to the second filter plate 4, and the other end is connected to the diffuser plate 6, so that a continuous flow path is formed between the air outlet side of the second filter plate 4 and the air inlet side of the diffuser plate 6.

[0034] In this embodiment, the guide plate 5 is inclinedly positioned between the second filter plate 4 and the diffuser plate 6, and connected to the front and rear components at both ends. One end of the guide plate 5 is connected to the second filter plate 4, meaning the guide plate 5 directly connects to the purified air output end, and the other end is connected to the diffuser plate 6, meaning the downstream end of the guide plate 5 directly connects to the diffuser plate 6 that enters the working area 17. Due to its inclined arrangement, a continuous transition space with path guiding effect is formed between the second filter plate 4 and the diffuser plate 6. After passing through the second filter plate 4, the air is guided and restricted by the surface of the guide plate 5, allowing it to transition along a predetermined inclined path towards the diffuser plate 6, thereby preventing the airflow from directly impacting the diffuser plate 6 in the compact space or spreading disorderly over a short distance. The arrangement of the guide plate 5, with one end connected upstream and the other downstream, allows the purified airflow to undergo a controlled guiding process before entering the diffuser plate 6, thereby improving the connection quality between the air supply section and the working area. By establishing a continuous flow guide relationship between the air outlet side of the second filter plate 4 and the air inlet side of the diffuser plate 6 through the inclined guide plate 5, the purified airflow transitions more smoothly and orderly from the purified state to the state of being delivered into the working area 17 within the limited space of the housing 1, and reduces the problems of local concentration, deflection or turbulence caused by sudden changes in the airflow path, thereby improving the stability of the airflow organization at the front end of the working area 17.

[0035] In one embodiment, the length direction of the guide plate 5 is consistent with or parallel to the length direction of the second filter plate 4, and the guide plate 5 is arranged between the second filter plate 4 and the diffuser plate 6 along the length direction of the second filter plate 4; the width of the guide plate 5 is smaller than the corresponding width of the second filter plate 4, and it is located in the middle area between the second filter plate 4 and the diffuser plate 6, so that the area corresponding to the guide plate 5 constitutes the main flow area, and the two sides of the guide plate 5 form an auxiliary transition area between the second filter plate 4 and the diffuser plate 6.

[0036] In this embodiment, the guide plate 5 occupies the main position in a long strip-shaped, centrally arranged manner. Its length direction is consistent with or parallel to the second filter plate 4, meaning that the guide plate 5 corresponds to the longitudinal extension range of the second filter plate 4 outside the main airflow direction, thus ensuring sufficient guiding length within the main airflow area. Its width is smaller than the corresponding width of the second filter plate 4, allowing the guide plate 5 to establish the main airflow guiding structure in the middle while retaining certain space on both sides. These spaces, together with the front and rear components, form auxiliary transition areas. The guide plate 5 in the middle undertakes the task of guiding the main airflow, that is, guiding the main airflow output from the fan 3 and purified by the second filter plate 4, while the auxiliary transition areas on both sides provide relatively gentle compensation paths for the airflow in the edge areas. A composite flow field structure is formed between the second filter plate 4 and the diffuser plate 6, where the central main flow and the auxiliary transition areas on both sides coexist. The flow in the central area is more controlled and concentrated, while the edge areas retain necessary buffering and compensation capabilities, thus avoiding the concentration of all airflow in a narrow area and also avoiding the weakening of the guiding effect due to the entire area being completely open. By defining the guide plate 5 as a long strip corresponding to the second filter plate 4 in the length direction and arranging it in the middle area, it guides the main airflow without filling the entire transition space, while forming auxiliary transition areas on both sides. This balances the central air supply organization and the edge flow field buffer, which helps to improve the overall transition balance of the purified airflow before it enters the diffuser plate 6.

[0037] In one embodiment, the guide plate 5 is provided with a plurality of guide holes 51 penetrating its thickness direction. The diameter and / or the per-unit area opening ratio of the guide holes 51 located in the projection area of ​​the air outlet axis of the fan 3 on the guide plate 5 are smaller than the diameter and / or the per-unit area opening ratio located in the extension areas on both sides of the projection area.

[0038] In this embodiment, when the fan 3 is working, it typically creates a strong main airflow effect in the area corresponding to its outlet axis. Therefore, if the openings in all parts of the guide plate 5 are completely identical, the airflow in the main outlet projection area may still be easier to concentrate and penetrate, resulting in excessive airflow in the central area and relatively insufficient airflow in the two side areas. This embodiment establishes flow resistance differences in the main outlet areas of the fan 3 by setting different apertures or different per unit area opening ratios in different areas of the guide plate 5. Specifically, the guide holes 51 in the outlet axis projection area of ​​the fan 3 are smaller or have a lower opening ratio, providing relatively greater flow resistance for the airflow in this area, while the apertures or opening ratios in the extended areas on both sides are larger, meaning that the edge areas have higher flow capacity. The purified air output by the fan 3 will not pass directly along the central main impact path in front of the guide plate 5, but will form a certain redistribution trend under the differentiated conditions of central restriction and relatively easy passage on both sides. By utilizing the regional differences in the guide holes 51, a flow resistance gradient is constructed on the plate surface, thereby suppressing the main air supply path and compensating for the flow in the edge areas, resulting in a more reasonable airflow distribution after passing through the guide plate 5. By setting the guide plate 5 with a structure featuring differentiated guide holes 51, active allocation of the purified airflow during the transition phase is achieved, thereby reducing the problem of concentrated air penetration in the main air outlet area of ​​the fan 3 and increasing the airflow participation in the lateral areas, thus improving the flow field distribution before entering the diffuser plate 6.

[0039] In one embodiment, the two sides of the guide plate 5 are provided with side edges 52 extending along the length direction of the guide plate 5. The side edges 52 are connected with the surface of the guide plate 5 to form a groove-shaped guide boundary, which is used to limit the lateral diffusion of the airflow on the outlet side of the second filter plate 4 on both sides of the guide plate 5.

[0040] In this embodiment, edge extension structures are added to both sides of the main body of the guide plate 5. The side edges 52 and the middle plate surface together form a guide member similar to a shallow groove. The side edges 52 are attached to the two side edges of the guide plate 5 and extend along the length direction. Their range of action is consistent with the main plate surface of the guide plate 5, and together they form a strip-shaped guide area with a lateral boundary. When the purified air flows from the second filter plate 4 to the diffuser plate 6, since the guide plate 5 itself plays a guiding role in the middle, the side edges 52 set on both sides further restrict the disorderly escape of the airflow to the lateral sides, so that the air flows more along the predetermined direction and predetermined range in the corresponding area of ​​the guide plate 5, rather than directly diffusing outward at the edge of the guide plate 5. That is, the side edges 52 are equivalent to establishing boundary walls on both sides of the guide plate 5, so that the guide plate 5 has a groove-shaped guide structure with a certain binding capacity, which more effectively maintains the integrity of the airflow in the central guide area and helps to enhance the continuity of air transmission in the length direction of the guide plate 5. By setting side edges 52 extending along the length direction on both sides of the guide plate 5, a groove-shaped guide boundary is formed, which can significantly reduce the tendency of the purified airflow to diffuse laterally on both sides of the guide plate 5, making the airflow organization in the central main flow area more stable and the boundary clearer, thereby improving the guide efficiency and controllability of the transition space between the second filter plate 4 and the diffuser plate 6.

[0041] It is worth noting that the shape, number, size ratio, and distribution of the guide plate 5 and guide holes 51 shown in the attached drawings are merely schematic representations used to illustrate the technical concept of this application and should not be construed as limiting the scope of protection of this application. In practical applications, the length, width, and tilt angle of the guide plate 5, as well as the diameter, number, spacing, and arrangement of the guide holes 51, can be adjusted according to the structural dimensions of the housing 1, the size of the filter plate, the air volume of the fan 3, the size of the working area 17, and the actual cleanliness requirements. As long as they can achieve the guiding transition and airflow organization effects described in this application, they should all fall within the scope of protection of this application.

[0042] In one embodiment, the housing 1 is provided with a PAO test port 12, a differential pressure gauge 13 and a control panel 14. The PAO test port 12 is connected to the air supply area where the second filter plate 4 is located. The differential pressure gauge 13 is connected to both sides of the first filter plate 2 and / or the second filter plate 4. The control panel 14 is located on the outside of the housing 1.

[0043] In this embodiment, the second filter plate 4 can be a gel-sealed high-efficiency filter. The PAO test port 12 is connected to the air supply area where the second filter plate 4 is located. This test port corresponds to the downstream purification air supply area and its purpose is to provide an interface for filter integrity testing, air supply area testing, or related cleanliness verification, so that the equipment not only has clean air supply capability during use, but also has the corresponding purification component testing and verification conditions. The differential pressure gauge 13 is connected to both sides of the first filter plate 2 and / or the second filter plate 4, and can be used to reflect the pressure difference state before and after filtration, thereby indirectly reflecting the working resistance or usage status of the filter plate, making it easier for the operator to judge whether the filter component is blocked, whether it needs maintenance or replacement. The control panel 14 is set on the outside of the housing 1. The start-up, shutdown, parameter display, or operation control of the equipment can be completed outside the equipment, so that the operator can operate the equipment without opening the housing 1 or interfering with the internal airflow environment. By configuring the detection and control components on the housing 1, the mobile sampling device can form a clean airflow circulation, and can visualize or operate and manage the key purification areas and filtration status, thereby improving the maintainability, operational monitorability, and standardization of cleanliness management of the equipment.

[0044] In one embodiment, the control panel 14 is electrically connected to a buzzer 15 and an emergency stop switch 16, which are disposed on the outer surface of the housing 1 to provide audible and visual alerts and emergency power-off control when the equipment malfunctions.

[0045] In this embodiment, the control panel 14 is electrically connected to the buzzer 15 and the emergency stop switch 16, meaning the control panel 14 is linked with the alarm and safety disconnection unit. The buzzer 15 is located on the outer surface of the enclosure 1, enabling it to promptly transmit abnormal operating information to external personnel through sound when the equipment malfunctions. The emergency stop switch 16 is also located on the outer surface of the enclosure 1, allowing the operator to quickly disconnect the equipment from the outside when abnormal equipment, abnormal working environment, or other emergencies are detected, preventing further escalation of risks. When the control system detects an abnormality, or when the operator identifies an abnormal state through the control panel 14, the buzzer 15 acts as an external warning device, while the emergency stop switch 16 acts as an emergency intervention device, allowing for rapid manual interruption of equipment operation. The equipment not only possesses air purification and detection management capabilities but also has the external operating conditions to respond promptly to abnormalities and implement safety controls, significantly enhancing the equipment's safety and abnormal response capabilities during use.

[0046] In one embodiment, the bottom of the housing 1 is provided with a plurality of casters, including omnidirectional casters, and at least some of the casters are provided with a braking structure so that the mobile sampling device has the functions of moving and positioning.

[0047] In this embodiment, casters are located at the bottom of the housing 1, allowing the entire housing 1 and its internal purification system to be moved by the operator through pushing or pulling. The casters provide better maneuverability within a limited space, facilitating mobile deployment between workshops, experimental areas, or different workstations. At least some casters are equipped with braking mechanisms, enabling the equipment to remain stably stationary after reaching the target location by locking the corresponding wheels, thus preventing displacement due to fan 3 vibration, slight ground slope, or external collisions. By configuring casters with braking functions, especially casters, at the bottom of the housing 1, the equipment of this application combines mobility adaptability with stability during fixed-point operation, thereby better adapting to application scenarios such as multi-station sampling, cleanroom transfer, or temporary localized cleanroom operations, further enhancing the overall practicality and scenario adaptability of the machine.

[0048] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A mobile sampling device with air purification function, characterized in that, Includes a housing (1), on the side of which a first filter plate (2) is provided, and inside the housing (1) along the airflow circulation direction, a fan (3), a second filter plate (4), a guide plate (5), a diffuser plate (6) and a working area (17) are arranged in sequence. The fan (3) is disposed between the first filter plate (2) and the second filter plate (4), the guide plate (5) is disposed between the second filter plate (4) and the diffuser plate (6), and the diffuser plate (6) is used to guide the airflow purified by the second filter plate (4) into the working area to form a clean airflow; The lower part of the housing (1) is provided with a return air channel (18), the working area (17) is connected to the return air channel (18), and the return air channel (18) is connected to the area where the first filter plate (2) is located, so as to form a circulating purified airflow.

2. The mobile sampling device with air purification function according to claim 1, characterized in that, The first filter plate (2) is disposed in the air inlet side area of ​​the housing (1), the second filter plate (4) is disposed in the air outlet side area of ​​the fan (3), and the fan (3) is mounted on the fan (3) frame disposed inside the housing (1); wherein the filtration accuracy of the first filter plate (2) is lower than that of the second filter plate (4).

3. The mobile sampling device with air purification function according to claim 1, characterized in that, It also includes a return air filter plate (7), the diffuser plate (6) and the return air filter plate (7) are respectively arranged on opposite sides of the working area (17), one end of the return air channel (18) is connected to the return air filter plate (7), and the other end is connected to the area where the first filter plate (2) is located.

4. The mobile sampling device with air purification function according to claim 1, characterized in that, The guide plate (5) is inclinedly disposed between the second filter plate (4) and the diffuser plate (6). One end of the guide plate (5) is connected to the second filter plate (4), and the other end is connected to the diffuser plate (6), so that a continuous flow path is formed between the air outlet side of the second filter plate (4) and the air inlet side of the diffuser plate (6).

5. The mobile sampling device with air purification function according to claim 1, characterized in that, The length direction of the guide plate (5) is consistent with or parallel to the length direction of the second filter plate (4), and the guide plate (5) is arranged between the second filter plate (4) and the diffuser plate (6) along the length direction of the second filter plate (4); the width of the guide plate (5) is smaller than the corresponding width of the second filter plate (4), and it is located in the middle area between the second filter plate (4) and the diffuser plate (6), so that the area corresponding to the guide plate (5) constitutes the main flow area, and the two sides of the guide plate (5) are surrounded by the second filter plate (4) and the diffuser plate (6) to form an auxiliary transition area.

6. The mobile sampling device with air purification function according to claim 1, characterized in that, The guide plate (5) is provided with a plurality of guide holes (51) that penetrate through its thickness direction. The diameter and / or the unit area opening ratio of the guide holes (51) located in the projection area of ​​the air outlet axis of the fan (3) on the guide plate (5) are smaller than the diameter and / or the unit area opening ratio of the holes located in the extension areas on both sides of the projection area.

7. The mobile sampling device with air purification function according to claim 1, characterized in that, Both sides of the guide plate (5) are provided with side edges (52) extending along the length direction of the guide plate (5). The side edges (52) and the surface of the guide plate (5) are connected to form a groove-shaped guide boundary, which is used to limit the lateral diffusion of the airflow on the outlet side of the second filter plate (4) on both sides of the guide plate (5).

8. The mobile sampling device with air purification function according to claim 1, characterized in that, The housing (1) is provided with a PAO test port (12), a differential pressure gauge (13) and a control panel (14). The PAO test port (12) is connected to the air supply area where the second filter plate (4) is located. The differential pressure gauge (13) is connected to both sides of the first filter plate (2) and / or the second filter plate (4). The control panel (14) is located on the outside of the housing (1).

9. The mobile sampling device with air purification function according to claim 8, characterized in that, The control panel (14) is electrically connected to a buzzer (15) and an emergency stop switch (16), which are located on the outer surface of the housing (1) to provide audible and visual alerts and emergency power-off control when the equipment is malfunctioning.

10. The mobile sampling device with air purification function according to claim 1, characterized in that, The bottom of the housing (1) is provided with multiple casters, including omnidirectional wheels, and at least some of the casters are provided with a braking structure so that the mobile sampling device has the functions of moving and positioning.

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