Convection type environment-friendly air detection device

Abstract

The utility model provides a convection type environment-friendly air detection device, which relates to the technical field of air detection devices and comprises a detection device body, an air inlet mounting frame is arranged at the bottom in the detection device body, and a convection fan is arranged in the air inlet mounting frame. An expansion type pre-separation assembly is arranged at the joint of the gas inlet mounting frame and used for pre-treating gas entering the detection device body, a convection enhancement assembly is further arranged in the detection device body, and through the design of the expansion type pre-separation assembly and the convection enhancement assembly, the gas in the detection device body can be pre-treated; air entering the detection device body can be subjected to classified filtration treatment, different detection tasks possibly need to carry out key monitoring on different types of pollutants, and the device can treat the different types of pollutants in a targeted manner by flexibly adjusting the types and the number of filtering pieces in the expanded pre-separation assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to air detection device technical field especially relates to a convection type environmental protection air detection device. BACKGROUND

[0002] Air detection device is used for monitoring the equipment of various components and parameters in air. It is usually equipped with sensor, can detect like harmful gas concentration, particulate matter content, temperature and humidity. Can collect data in real time and transform into electric signal, after processing, presents in direct view form, provides key basis for evaluating air quality, guaranteeing environmental health and industrial production safety etc.

[0003] According to the convection type environmental protection air detection device (announcement number: CN212255238U) disclosed by Chinese patent document, the device can realize the convection path of air through the air inlet and air outlet on the handheld shell, the air entering the inside of the handheld shell through the air inlet is accelerated by the air convector, the accelerated air flows quickly to the air detection module located at the air outlet, the air detection module can obtain sufficient detection gas and detect the gas, the air convector realizes the guidance of the air convection direction, and the air convection speed is accelerated. The convection type environmental protection air detection device of the utility model embodiment can accelerate the convection of the detection air, can capture enough detection samples, and the measurement result is accurate.

[0004] But the above scheme still has the following shortcomings when implementing:

[0005] The device cannot effectively pre-separate and finely process air samples. For example, in some industrial pollution is more serious areas, there are a large number of dust particles in the air, but at this time the target gas is the determination of some toxic and harmful gases, and these mixed gas containing dust particles will directly enter the device, which can easily cause sensor blockage, corrosion or interference with the detection signal, thereby reducing the detection accuracy and shortening the service life of the sensor.

[0006] Further, the air inlet system of the device cannot meet the demand of targeted treatment for different types of pollutants, and it is difficult to adapt to complex and changeable air quality detection scenes.

[0007] Therefore, we propose a convection type environmental protection air detection device. UTILITY MODEL CONTENT

[0008] The utility model aims at solving the shortcomings in the prior art, the air inlet system of the device cannot meet the demand of targeted treatment for different types of pollutants, and it is difficult to adapt to complex and changeable air quality detection scenes.

[0009] In order to achieve the above object, the utility model adopts the following technical scheme:

[0010] A convection type environmental protection air detection device, including detection device body, the bottom of the inside of detection device body is equipped with air inlet installation frame, the inside of air inlet installation frame is equipped with convection fan, the junction of air inlet installation frame is equipped with expansion type preseparation assembly, expansion type preseparation assembly is used for the pretreatment of the gas that enters the inside of detection device body, the inside of detection device body is equipped with convection enhancement assembly still, expansion type preseparation assembly includes guide connecting piece, fixed mounting, first movable expansion piece, first filter piece, second movable expansion piece and second filter piece, convection enhancement assembly includes guide plate and enhancement fan.

[0011] As the preferred scheme of the utility model, the expansion type preseparation assembly further includes a fixed mounting groove, a first connecting magnetic block, a first filter piece, a first connecting groove, a second connecting magnetic block, a second connecting groove, a second filter piece, a second sealing cover, and a third connecting magnetic block.

[0012] As the preferred scheme of the utility model, the bottom of the guide connecting piece is provided with a fixed mounting piece, the inside of the fixed mounting piece is provided with a fixed mounting groove, the inside bottom of the fixed mounting groove is provided with a first movable expansion piece, the top of the first movable expansion piece is provided with a first connecting magnetic block, the inside of the first movable expansion piece is provided with a first filter piece, and the inside of the first movable expansion piece and outside of the first filter piece are provided with a first connecting groove.

[0013] As the preferred scheme of the utility model, the bottom of the first movable expansion piece is provided with a second movable expansion piece, the top of the second movable expansion piece is provided with a second connecting magnetic block, the inside of the second movable expansion piece is provided with a second filter piece, the inside of the second movable expansion piece and outside of the second filter piece are provided with a second connecting groove, the bottom of the second movable expansion piece is provided with a second sealing cover, and the top of the second sealing cover is provided with a third connecting magnetic block.

[0014] As the preferred scheme of the utility model, the guide connecting piece and the air inlet installation frame are designed in an integrated manner, the fixed mounting piece and the guide connecting piece are fixedly connected, the first movable expansion piece is magnetically connected in the fixed mounting groove of the fixed mounting piece through the first connecting magnetic block, the second movable expansion piece is magnetically connected in the first connecting groove of the first movable expansion piece through the second connecting magnetic block, and the second sealing cover is magnetically connected in the second connecting groove of the second movable expansion piece through the third connecting magnetic block.

[0015] As the preferred scheme of the utility model, the first movable expansion piece, the first connecting magnetic block, the first filter piece and the first connecting groove are an entirety, the second movable expansion piece, the second connecting magnetic block, the second connecting groove and the second filter piece are an entirety, and the number of single entirety can be increased or reduced according to the use condition to satisfy different use requirements.

[0016] As the preferred scheme of the utility model, the top of the detection device body is also provided with an air outlet, and a first sealing cover is threadedly connected to the top of the air outlet.

[0017] As the preferred scheme of the utility model, the guide plate is arranged in the inside of the detection device body, and the two ends are connected with the air outlet and the air inlet mounting frame respectively, the enhanced fan is arranged in the inside of the guide plate, and the connecting part of the guide plate is also provided with a detection element.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] In the utility model, through the design of the expansion type pre-separation assembly and the convection enhancement assembly, the air entering the detection device body can be subjected to graded filtering treatment, and different detection tasks can require monitoring different types of pollutants, the device can be used for treating different types of pollutants in a targeted manner by flexibly adjusting the type and number of filter pieces in the expansion type pre-separation assembly, and the guide plate and the enhanced fan in the convection enhancement assembly work cooperatively, the guide plate is arranged in the inside of the detection device body, and the two ends are connected with the air outlet and the air inlet mounting frame respectively, forming a complete air flow passage, so that the air flows more smoothly through the expansion type pre-separation assembly, the detection element and other key parts, and the occurrence of local airflow stagnation or turbulent flow phenomenon is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A main body structure schematic view of the convection type environmental protection air detection device is provided in the utility model.

[0021] Figure 2 A first visual angle schematic view of the expansion type pre-separation assembly of the convection type environmental protection air detection device is provided in the utility model.

[0022] Figure 3 A second visual angle schematic view of the expansion type pre-separation assembly of the convection type environmental protection air detection device is provided in the utility model.

[0023] Figure 4 A first sealing cover unfolding schematic view of the convection type environmental protection air detection device is provided in the utility model.

[0024] Figure 5The utility model provides a kind of convection type environmental protection air detection device's main body overhead section view schematic diagram for the utility model provides a kind of convection type environmental protection air detection device's

[0025] Figure 6 The utility model provides a kind of convection type environmental protection air detection device's Figure 5 The structure amplification schematic view of place A in middle.

[0026] Legend: 1, detection device body; 2, gas outlet; 3, first sealing cover; 4, guide connecting piece; 5, air inlet installation frame; 6, convection fan; 7, fixed mounting; 8, fixed mounting groove; 9, first movable expansion piece; 10, first connecting magnetic block; 11, first filter; 12, first connecting groove; 13, second movable expansion piece; 14, second connecting magnetic block; 15, second connecting groove; 16, second filter; 17, second sealing cover; 18, third connecting magnetic block; 19, guide plate; 20, enhanced fan; 21, detection element. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the embodiments of the utility model below, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model.

[0028] In order to facilitate understanding of the utility model, the utility model will be described more fully with reference to related, given a number of embodiments of the utility model, however, the utility model can be realized in many different forms, and is not limited to the embodiments described in the text, on the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be intervening elements, and when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be intervening elements, the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs, the terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model, the term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0031] Embodiment

[0032] As Figures 1-6 shown, the utility model provides a technical scheme: guide connecting piece 4 as the front end guide part of air intake system, its bottom is closely linked with fixed mounting piece 7, fixed mounting piece 7 adopts firm and corrosion -resistant metal material (such as aluminium alloy) to make, its inside precisely processed fixed installation groove 8, groove wall is smooth and has certain depth, to ensure that first movable expansion piece 9 can stably be embedded therein.

[0033] The integrated design of guide connecting piece 4 and air inlet mounting frame 5 is formed by precise casting process once, which ensures the seamless connection between the two, greatly reduces the risk of air leakage at the interface. This integrated structure not only enhances the overall stability of the air intake system, but also optimizes the smoothness of air entry, making the air intake process more stable and reliable, avoiding air leakage and uneven air intake caused by loose joints or gaps.

[0034] The first connecting magnetic block 10 at the top of the first movable expansion piece 9 is made of high-magnetic-strength permanent magnet material (such as neodymium iron boron magnet), which produces a strong magnetic force of attraction with the corresponding metal part at the bottom of the fixed installation groove 8 of the fixed mounting piece 7. During installation, the first movable expansion piece 9 only needs to be aligned with the fixed installation groove 8, and the magnetic block can quickly be attracted and fixed in the groove, with precise positioning. This magnetic connection method does not require the use of complex mechanical connectors such as screws and nuts, simplifying the installation process and making the disassembly of the first movable expansion piece 9 extremely convenient.

[0035] When the first filter 11 needs to be replaced or cleaned, the operator only needs to apply a certain external force to overcome the magnetic force, and the first movable expansion piece 9 can be removed from the fixed installation groove 8, greatly shortening the maintenance time and improving the maintainability of the equipment.

[0036] The magnetic connection between the second movable expansion piece 13 and the first movable expansion piece 9 and the second sealing cover 17 is similar. The second connecting magnetic block 14 at the top of the second movable expansion piece 13 is attracted to the metal part at the top edge of the first connecting groove 12 inside the first movable expansion piece 9, achieving tight connection between the two.

[0037] The third connecting magnetic block 18 at the top of the second sealing cover 17 is adsorbed to the bottom edge of the second connecting groove 15 inside the second movable expansion piece 13, ensuring the sealing of the entire expansion type pre-separation assembly in the vertical direction. This layer-by-layer nested and magnetically connected structure effectively prevents air from leaking through the gaps between the components, ensuring that air can only pass through each filter in the predetermined path, improving the efficiency and reliability of air filtration.

[0038] The material of the coarse filter screen of the first filter 11 is usually polypropylene fiber or polyester fiber. These fibers are woven by a special weaving process to form a filter screen with a certain pore structure.

[0039] The pore size is generally between 5-100 microns, which can effectively intercept larger particles in the air, such as dust, hair, lint, etc.

[0040] The working principle is based on physical interception. When air passes through the filter screen, large particle impurities are blocked on the surface of the filter screen because their particle size is larger than the pore size of the filter screen. With the passage of time, impurities will gradually accumulate on the surface of the filter screen to form a layer of dirt. However, since the first filter 11 is mainly for large particle impurities, the filter screen structure is relatively loose and has a certain self-cleaning ability. Some lighter impurities may fall off under the impact of air flow, or most of the impurities can be cleaned by simple blowing during equipment downtime, prolonging the service life of the filter screen.

[0041] If the second filter 16 is an activated carbon filter screen, the activated carbon particles are high-quality coconut shell activated carbon or coal activated carbon. These activated carbon particles have highly developed microporous structures, with micropore diameters typically between 0.5-5 nanometers.

[0042] When air containing harmful gases such as formaldehyde and benzene passes through the activated carbon filter screen, harmful gas molecules enter the micropores of the activated carbon under the action of molecular diffusion. Due to the van der Waals force between the carbon atoms on the surface of the activated carbon and the harmful gas molecules, this force can adsorb and fix the harmful gas molecules in the micropores, thereby removing the harmful gas. If the second filter 16 is a fine particulate matter filter screen, its material may be glass fiber or melt-blown polypropylene fiber.

[0043] This filter screen uses electrostatic polarization technology to charge the surface of the fiber, which can adsorb even smaller particles such as PM2.5 and even smaller ultrafine particles. The pore size is generally between 0.3-5 microns. Through the dual action of electrostatic adsorption and physical interception, it can efficiently filter the small particles in the air, further purifying the air sample and providing purer air for subsequent detection.

[0044] Since the first movable expansion piece 9, the first connecting magnetic block 10, the first filter 11, and the first connecting slot 12 are a whole, and the second movable expansion piece 13, the second connecting magnetic block 14, the second connecting slot 15, and the second filter 16 are a whole, the number of individual wholes can be increased or decreased according to the use.

[0045] In practical applications, if the types of pollutants in the detection environment are relatively single and the concentration is relatively low, such as in ordinary indoor environment, only one layer of the first active expansion piece 9 and one layer of the second active expansion piece 13 may be needed to meet the detection requirements. However, if in an industrial area with serious pollution, there may be a large amount of dust, various harmful gases and particles of different particle sizes in the air. At this time, according to the specific pollution situation, the number of the first active expansion piece 9 and the second active expansion piece 13 can be increased, or special filters for specific pollutants can be added, such as alkaline adsorbent filter screen for sulfur dioxide and other acidic gases, or chemical adsorption filter screen for heavy metal particles. This flexible expansion makes the detection device adapt to various complex air quality detection scenes, greatly improving the versatility and practicality of the equipment.

[0046] The guide plate 19 is made of engineering plastic (such as polycarbonate) or light metal (such as aluminum alloy), and its shape is carefully designed with a good streamline profile.

[0047] The installation angle and position of the guide plate 19 in the detection device body 1 are accurately calculated and adjusted to ensure the best air flow channel between the air inlet mounting frame 5 and the air outlet 2. The surface of the guide plate 19 is smooth and treated with special coating, such as anti-static coating and low friction coefficient coating, to reduce air resistance and static adsorption during air flow.

[0048] Its role is to guide the air to flow along the predetermined path, avoiding the formation of turbulent flow or backflow inside the device. When the air enters from the air inlet, it can smoothly flow to the expansion type pre-separation assembly for filtration, and then to the area where the detection element 21 is located. This orderly air flow guidance can ensure that each detection element 21 can uniformly contact the filtered air sample, improving the accuracy and consistency of the detection results.

[0049] The enhanced fan 20 is a small and efficient DC brushless fan, whose speed can be adjusted according to the detection requirements. The fan blades are designed with special aerodynamics, with high lift coefficient and low drag coefficient, which can generate large air pressure difference at low power consumption. When the fan is running, it forms a local negative pressure area inside the guide plate 19, so that the air at the air inlet can be quickly sucked into the device.

[0050] At the same time, the airflow generated by the fan pushes the filtered air to pass through the detection element 21 quickly, shortens the residence time of the air at the detection element 21, and improves the detection efficiency. For example, in the rapid detection scenario in the high concentration of pollutants environment, the rotation speed of the enhanced fan 20 can be increased to speed up the circulation of air, so that the detection device can obtain accurate air quality data more timely.

[0051] In summary, the specific working steps are as follows:

[0052] In the air intake and pre-separation stage, after starting the detection device, the convection fan 6 installed in the air intake frame 5 is first started to rotate at a certain speed to generate suction. Under the action of the convection fan 6, the external air enters the inside of the device through the air inlet, and first enters the guide connecting piece 4 of the expanded pre-separation assembly. Due to the special shape design of the guide connecting piece 4, the air can be uniformly dispersed into the fixed installation slot 8 of the fixed installation piece 7, and then contact the first filter 11 in the first movable expansion piece 9. Large-particle impurities such as leaf fragments and larger dust particles are intercepted on the filter screen surface by the first filter 11 because their particle sizes are larger than the pore size of the first filter 11. After the preliminary filtration of the first filter 11, the air continues to flow downward into the second filter 16 (if installed) in the second movable expansion piece 13. If the second filter 16 is an activated carbon filter screen, harmful gas molecules such as formaldehyde and benzene in the air are adsorbed by the activated carbon. If it is a fine particulate matter filter screen, it further removes small dust particles. After this series of pre-separation treatment, most of the impurities and part of the harmful gases in the air sample are removed, and the air becomes relatively pure, preparing for subsequent detection.

[0053] In the convection and detection stage, the air after pre-separation treatment enters the convection enhancement assembly area. The enhanced fan 20 rotates at high speed inside the guide plate 19 to generate strong air flow power. Under the guidance of the guide plate 19, the air quickly flows to the position of the detection element 21 along the preset channel. The detection element 21 usually includes various high-precision sensors such as electrochemical sensors and optical sensors. When the air flows through the detection element 21, the sensor detects the target pollutants in the air according to its working principle. For example, the electrode in the electrochemical sensor reacts with the specific harmful gas molecules in the air to produce a weak current signal, which is proportional to the concentration of harmful gas. The optical sensor uses the principle of light scattering and absorption to detect the number and particle size distribution of particulate matter in the air. The detection element 21 transmits the detected signal to the signal processing circuit inside the device for amplification, filtering, conversion and other processing, and finally obtains accurate air quality detection data.

[0054] In the air outlet and sealing stage, the air after detection by the detection element 21 continues to flow to the air outlet 2 of the detection device body 1 under the guidance of the guide plate 19, and the first sealing cover 3 at the top of the air outlet 2 is in an open state during normal operation of the detection device, so that the air can be smoothly discharged, and when the detection device stops working, the first sealing cover 3 can be manually tightened to prevent external dust, impurities and the like from entering the inside of the device, thereby protecting the internal components such as the expansion type pre-separation assembly, the convection enhancement assembly and the detection element 21 from being contaminated, so that the normal operation of the equipment can be ensured when the detection device is started next time, and equipment failure and detection errors caused by impurities entering can be reduced. In the entire working process, the components work cooperatively, from air inlet to air outlet, forming a complete and efficient air detection circulation system, which can accurately detect air quality and adapt to different detection environment requirements.

[0055] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A convective environmental air detection device, comprising a detection device body (1), characterized in that: The bottom of the detection device body (1) is provided with an air inlet mounting frame (5), the inside of the air inlet mounting frame (5) is provided with a convection fan (6), the connecting part of the air inlet mounting frame (5) is provided with an expanded pre-separation assembly, the expanded pre-separation assembly is used for pretreating the gas entering the inside of the detection device body (1), the inside of the detection device body (1) is also provided with a convection enhancement assembly, the expanded pre-separation assembly comprises a guide connecting piece (4), a fixed mounting piece (7), a first movable expansion piece (9), a first filter piece (11), a second movable expansion piece (13) and a second filter piece (16), and the convection enhancement assembly comprises a guide plate (19) and an enhanced fan (20).

2. The convective environmental air detection device according to claim 1, wherein: The expanded pre-separation assembly further comprises a fixed mounting groove (8), a first connecting magnetic block (10), a first filter piece (11), a first connecting groove (12), a second connecting magnetic block (14), a second connecting groove (15), a second filter piece (16), a second sealing cover (17) and a third connecting magnetic block (18).

3. The convective, environmentally friendly air detection device of claim 2, wherein: The bottom of the guide connecting piece (4) is provided with a fixed mounting piece (7), the inside of the fixed mounting piece (7) is provided with a fixed mounting groove (8), the inside bottom of the fixed mounting groove (8) is provided with a first movable expansion piece (9), the top of the first movable expansion piece (9) is provided with a first connecting magnetic block (10), the inside of the first movable expansion piece (9) is provided with a first filter piece (11), and the inside of the first movable expansion piece (9) and outside of the first filter piece (11) are provided with a first connecting groove (12).

4. The convective, environmentally friendly air detection device of claim 3, wherein: The bottom of the first movable expansion piece (9) is provided with a second movable expansion piece (13), the top of the second movable expansion piece (13) is provided with a second connecting magnetic block (14), the inside of the second movable expansion piece (13) is provided with a second filter piece (16), the inside of the second movable expansion piece (13) and outside of the second filter piece (16) are provided with a second connecting groove (15), the bottom of the second movable expansion piece (13) is provided with a second sealing cover (17), and the top of the second sealing cover (17) is provided with a third connecting magnetic block (18).

5. The convective, environmentally friendly air detection device of claim 4, wherein: The guide connecting piece (4) and the air inlet mounting frame (5) are designed in an integrated manner, the fixed mounting piece (7) and the guide connecting piece (4) are fixedly connected, the first movable expansion piece (9) is magnetically connected in the fixed mounting groove (8) of the fixed mounting piece (7) through the first connecting magnetic block (10), the second movable expansion piece (13) is magnetically connected in the first connecting groove (12) of the first movable expansion piece (9) through the second connecting magnetic block (14), and the second sealing cover (17) is magnetically connected in the second connecting groove (15) of the second movable expansion piece (13) through the third connecting magnetic block (18).

6. The convective, environmentally friendly air detection device of claim 5, wherein: The first movable expansion piece (9), the first connecting magnetic block (10), the first filter piece (11) and the first connecting groove (12) are an integral whole, the second movable expansion piece (13), the second connecting magnetic block (14), the second connecting groove (15) and the second filter piece (16) are an integral whole, and the number of single integral wholes can be increased or reduced according to use conditions to meet different use requirements.

7. The convective, environmentally friendly air detection device of claim 6, wherein: The top of the detection device body (1) is also provided with an air outlet (2), and the top of the air outlet (2) is threadedly connected with a first sealing cover (3).

8. The convective, environmentally friendly air detection device of claim 7, wherein: The guide plate (19) is arranged in the inside of the detection device body (1), and both ends are connected with the air outlet (2) and the air inlet mounting frame (5) respectively, the enhanced fan (20) is arranged in the inside of the guide plate (19), and the connecting part of the guide plate (19) is also provided with a detection element (21).

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