Airflow pattern testing tool and testing device

Abstract

The utility model provides an air flow pattern testing tool and a testing device, and relates to the technical field of air flow pattern testing. The air flow pattern test tool comprises a test piece; the surface of the test piece is a curved surface, a closed cavity is formed in the test piece, and the closed cavity is filled with gas with the density smaller than that of gas in the to-be-tested space, so that the test piece can float under the blowing action of the gas flow in the to-be-tested space and move in the flow direction of the gas flow. The airflow flow type testing tool can indicate the overall movement track of airflow through the testing piece which can float along with airflow blowing and move in the airflow direction, the testing process is continuous, all airflow movement tracks can be reflected, the testing accuracy is improved, operation is convenient and fast, and smoke residues cannot be generated to pollute the space to be tested.

Description

TECHNICAL FIELD

[0001] The utility model relates to airflow flow pattern test technical field especially is related to an airflow flow pattern test tool and testing arrangement. BACKGROUND

[0002] Airflow flow pattern test is a method for studying the trajectory and distribution of air organization flow in a room, and is very important for controlling pollution and cross pollution in a clean area.

[0003] Currently, the airflow flow pattern test methods mainly include a tracer line method and a smoke (mist) method. The tracer line method refers to fixing a light fiber such as a nylon monofilament line or a cotton line at the end of a test rod or on a filament grid in airflow, and then observing the direction of airflow by observing the change of the light fiber. The smoke (mist) method refers to generating water mist with a diameter of 0.5 μm to 50 μm as tracer particles by using deionized water through solid carbon dioxide (dry ice) or an ultrasonic atomizer, or using titanium tetrachloride (TiCl4) as tracer particles, and observing the propagation and deformation of the tracer particles in airflow to determine the flow direction and flow characteristics of the airflow.

[0004] Since the longer the light fiber is, the more easily it is interfered by gravity and thus the test result is affected, the tracer line method can only test the airflow locally. Moreover, since the tracer line method often needs to fix many devices in a space, the tracer line method cannot fully show the real airflow direction, the test result has low accuracy, and the tracer line method is complicated to operate and inconvenient to use. The smoke (mist) method also has the problem that as the smoke (mist) distance is prolonged, the smoke gradually disperses, which cannot be observed and recorded. Even if oil mist is used, the smoke will still be dispersed and cannot be clearly observed, and the smoke will naturally fall down due to gravity, which cannot fully show the real airflow direction, and the smoke will also cause pollution to the clean area.

[0005] Therefore, both the tracer line method and the smoke (mist) method have the disadvantages that the test process is discontinuous, the whole airflow motion trajectory cannot be reflected, and the weight of the existing test tool causes deviation of the test trajectory and affects the accuracy of the test result. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing an airflow flow pattern test tool and testing arrangement to solve the technical problem that the tracer line method and the smoke (mist) method for testing airflow flow pattern in the prior art have the disadvantages that the test process is discontinuous, the whole airflow motion trajectory cannot be reflected, and the weight of the existing test tool causes deviation of the test trajectory and affects the accuracy of the test result.

[0007] In a first aspect, the utility model provides an airflow flow pattern test tool, which comprises a test piece.

[0008] The surface of the test piece is curved, and a closed cavity is formed in the test piece and filled with a gas having a density less than that of the gas in the space to be tested, so that the test piece can float and move along the flow direction of the airflow in the space to be tested under the blowing action of the airflow.

[0009] In an optional embodiment, the test piece is a plurality of test pieces, and the plurality of test pieces are divided into a plurality of groups, and the plurality of groups of test pieces are respectively arranged at a plurality of test positions in the space to be tested.

[0010] In an optional embodiment, the test piece is spherical.

[0011] In an optional embodiment, the outer diameter of the test piece is 0.5mm-250mm.

[0012] In an optional embodiment, the material of the test piece is rubber or plastic.

[0013] In an optional embodiment, the test piece is provided with an inflation hole in communication with the closed cavity, and a sealing plug is arranged at the inflation hole.

[0014] In an optional embodiment, the material of the sealing plug is rubber.

[0015] In an optional embodiment, the density of the test piece is 0.6 g / cm 3 ~1.8g / cm 3 .

[0016] In a second aspect, the utility model provides a kind of test device, including release assembly and the airflow flow pattern test tool of any one of the foregoing embodiments;

[0017] The release assembly includes a frame for containing the test piece, the frame is provided with a release port, the release port is movably mounted with a blocking piece, the blocking piece is used to move relative to the release port to open or close the release port, and the test piece is used to be released from the frame to the outside when the release port is opened.

[0018] In an optional embodiment, the frame is provided with a plurality of containing portions, each containing portion is used to contain one test piece, and each containing portion is provided with one release port.

[0019] In an optional embodiment, the frame includes a plurality of support pieces, and the plurality of support pieces are sequentially and spacedly distributed, and at least one release port is formed between any two adjacent support pieces of a group.

[0020] A plurality of the release ports on the same straight line are a release port group along the distribution direction of the support, and one of the blocking members is movably installed at each of the release port groups;

[0021] The support and the blocking member at each of the release ports are used to form a containing part, and each of the containing parts is used to contain one of the test members.

[0022] In an optional embodiment, the frame further comprises a ring-shaped enclosing member, and the plurality of supports are fixed to the inner side of the enclosing member.

[0023] The blocking member comprises end rods and an intermediate rod, two ends of the intermediate rod are respectively connected with one of the end rods, the end rods are hinged to the enclosing member, and the intermediate rod is located below the plurality of supports. The blocking member is used to rotate relative to the plurality of supports to open the release port in the process of rotating close to the supports.

[0024] The airflow flow pattern testing tool provided by the utility model is used for airflow flow pattern testing, before testing, the testing piece can be placed at the gas outlet or other testing positions in the space to be tested, at this time, the testing piece can be supported by the external force applied by the supporting object or the tester, so that the testing piece is stably positioned at the testing position, then the airflow can be introduced into the testing position in the space to be tested.

[0025] Compared with the prior art, the airflow flow pattern testing tool provided by the utility model can indicate the overall motion direction of the airflow through the testing piece which can float and move along the airflow direction under the blowing of the airflow, not only the testing process is continuous, the testing accuracy is improved, and the operation is convenient, and the space to be tested is not polluted by the smoke residue.

[0026] The test device provided by the utility model includes the releasing assembly and the airflow flow pattern testing tool, the releasing assembly includes a frame for accommodating a test piece, the frame is provided with a releasing port, a blocking piece is movably installed at the releasing port, the blocking piece is used for moving relative to the releasing port to open or close the releasing port, and the test piece is used for being released from the frame to the outside when the releasing port is opened. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings described in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0028] Figure 1 The structural schematic diagram of the airflow flow pattern testing tool provided by the utility model embodiment is shown in the figure.

[0029] Figure 2 The structural schematic diagram of the releasing assembly in the test device provided by the utility model embodiment is shown in the figure.

[0030] Icon: 1-test piece; 10-sealing plug; 2-releasing assembly; 20-frame; 200-blocking piece; 201-supporting piece; 202-enclosure piece; 203-top crossbar; 21-pull rope; 22-height adjustment structure. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the utility model embodiments clearer, the technical scheme in the utility model embodiments will be clearly and completely described in combination with the drawings in the utility model embodiments. Obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. The components of the utility model embodiments described and shown in the drawings can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0033] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] Example:

[0035] like Figure 1 As shown, the airflow pattern testing device provided in this embodiment includes a test piece 1; the surface of the test piece 1 is curved, and a sealed cavity is formed inside the test piece 1 and the sealed cavity is filled with a gas with a density lower than that of the gas in the space to be tested, so that the test piece 1 can float and move along the airflow direction under the blowing action of the airflow in the space to be tested.

[0036] The airflow pattern testing apparatus provided in this embodiment is used for airflow pattern testing. Before testing, the test piece 1 can be placed at the test position, such as the air outlet, in the space to be tested. At this time, the test piece 1 can be supported by a supporting object or by the tester, so that the test piece 1 is stably located at the test position. Then, airflow can be introduced into the test position in the space to be tested. At the same time as the airflow is introduced, the external force at the test piece 1 is removed, so that the test piece 1 is released. Since the test piece 1 has a sealed cavity inside and is filled with a gas with a density lower than that of the gas in the space to be tested, the test piece 1 has a lightweight structure and is relatively light. After the test piece 1 is released, it can float in the airflow under the blowing action of the airflow and move with the direction of the airflow. In addition, since the surface of the test piece 1 is curved, the air resistance on the surface of the test piece 1 is small, making it easy to move with the airflow. During the movement of the test piece 1 with the airflow, the flow trajectory of the airflow can be determined by recording and observing the movement trajectory of the test piece 1, thereby facilitating the determination of the airflow direction, distribution, and flow characteristics.

[0037] Compared to the existing tracer line method, the airflow pattern testing device provided in this embodiment can indicate the entire flow trajectory of the airflow using the test piece 1 that flows with the airflow. It can fully display the airflow trajectory, and the test results are more accurate. It does not require changing the position of the test device multiple times or requiring testers to record at multiple local test positions in sequence, thereby effectively reducing the number of testers and preventing testers from obstructing the airflow and affecting the test results. In addition, the airflow pattern testing device provided in this embodiment only requires placing and releasing the test piece 1 during use, making the operation more convenient.

[0038] Compared to existing smoke (fog) methods, the airflow pattern testing device provided in this embodiment can also use test piece 1 to indicate the entire flow trajectory of the airflow, resulting in higher test accuracy. Furthermore, test piece 1 is a visible solid structure, which is more stable and easier to observe than smoke, and can fully display the true airflow direction and trajectory. At the same time, test piece 1 is easy to recycle and will not produce smoke residue that pollutes the test space.

[0039] Compared with the prior art, the airflow pattern testing device provided in this embodiment uses a test piece 1 with a sealed cavity inside and a density not greater than the gas density in the space to be tested. The test piece 1 can float and move along the airflow direction as it is blown by the airflow, thereby indicating the overall movement trajectory of the airflow. Not only is the testing process continuous and can reflect the entire airflow movement trajectory, improving the test accuracy, but it is also easy to operate, does not produce smoke residue and pollute the space to be tested, and can reduce the obstruction and interference of the test personnel on the airflow, further effectively improving the accuracy of the test results.

[0040] To ensure that test piece 1 has a low weight and can float in the airflow, this embodiment preferably has a low density. Specifically, the density of test piece 1 can be equal to or slightly less than the density of the gas in the test space. For example, the density of test piece 1 can be 0.6 g / cm3 to 1.8 g / cm3, and the corresponding mass of test piece 1 can be 0.1 mg to 100 g.

[0041] Furthermore, there are multiple test pieces 1, which are divided into multiple groups. The multiple groups of test pieces 1 are respectively used to set at multiple test positions in the space to be tested, so as to test the airflow trajectory at the multiple test positions respectively.

[0042] Each set of test pieces 1 includes at least one test piece 1. During the airflow pattern testing process, one or more test pieces 1 can be used for testing depending on the test location. For example, when it is necessary to study the airflow pattern of a local space, that is, when there is only one test location, one test piece 1 or a set of test pieces 1 can be selected; while when it is necessary to test the airflow pattern at the air outlet or the HEPA filter layer in the space under test, that is, when there are multiple test locations, multiple sets of test pieces 1 can be selected and placed at multiple test locations respectively. When the test starts, multiple sets of test pieces 1 are released simultaneously or in stages.

[0043] It should be noted that, in order to facilitate the differentiation of airflow conditions at different test locations, multiple test pieces 1 can be set with different features to distinguish each test piece 1. For example, multiple test pieces 1 can use different colors. In this case, test pieces 1 of different colors can represent the motion trajectory of airflow at different test locations, which can effectively avoid confusion of motion trajectories caused by confusion between test pieces 1 of the same color.

[0044] As can be seen, this embodiment, by setting multiple sets of test pieces 1, can study various airflow patterns such as unidirectional flow, vector flow, and turbulent flow, and can even study the location and direction of eddies, helping to investigate the causes of eddy formation. Furthermore, since the test piece 1 in this embodiment can float in the air like air after being released and is propelled by the spatial airflow, moving in the direction of the airflow, this test piece 1 not only helps to study the trajectory and direction of spatial airflow, but also helps to study the diffusion and distribution of airborne particles with the airflow, as well as the rebound of airflow after encountering a contact surface obstruction. In addition, during the testing process using this test piece 1, the potential risks introduced into the test space after dynamic simulation intervention by test personnel can also be tested, thereby facilitating better control of contamination and cross-contamination in the clean environment.

[0045] In this embodiment, the surface of test piece 1 is curved. Based on this, the shape of test piece 1 can be an irregular sphere, such as a sphere or an ellipsoid. To minimize the air resistance of test piece 1 in the airflow and make it easier for test piece 1 to float in the airflow, this embodiment preferably uses a spherical shape for test piece 1.

[0046] Furthermore, the outer diameter of test piece 1 can be 0.5mm to 250mm.

[0047] To effectively reduce the weight of test piece 1 so that it can float in the airflow, the material of test piece 1 can be lightweight materials such as rubber or plastic.

[0048] The plastic can be polyurethane, low-density polyethylene (LDPE), or polypropylene.

[0049] In this embodiment, the preferred material for test piece 1 is rubber, which can be natural rubber or synthetic rubber such as styrene-butadiene rubber.

[0050] Furthermore, the test piece 1 can be divided into multiple layers from the inside out, and the innermost layer of the multi-layer test piece 1 is preferably made of natural rubber, while the outermost layer is preferably made of synthetic rubber. This arrangement makes the test piece 1 lighter and easier to move with the airflow.

[0051] In this embodiment, the test piece 1 may be provided with an air inlet communicating with a sealed cavity, and a sealing plug 10 is provided at the air inlet.

[0052] As the usage time of test piece 1 increases, air leakage occurs within the sealed cavity of test piece 1. When test piece 1 leaks, air seeps into the sealed cavity, causing the gas density inside test piece 1 to increase. This results in test piece 1 becoming heavier and less able to move with the airflow. Therefore, in this embodiment, test piece 1 is preferably provided with an inflation hole that communicates with the sealed cavity, and a sealing plug 10 is provided at the inflation hole. When test piece 1 leaks, the sealing plug 10 can be opened and gas with a density lower than that in the test space can be added to the sealed cavity through the inflation hole. After inflation, the sealing plug 10 is fixed in the inflation hole to prevent air leakage.

[0053] To reduce the overall weight of test piece 1 while ensuring the sealing effect of sealing plug 10, the material of sealing plug 10 can also be rubber. Furthermore, sealing plug 10 can be made of polyisoprene rubber, brominated (chlorinated) butyl rubber, hydrogenated nitrile rubber or polyurethane rubber.

[0054] It should also be noted that, to facilitate the recording of the motion trajectory of test piece 1 for airflow pattern analysis, the airflow pattern testing apparatus provided in this embodiment can also be used in conjunction with a recording device and a computer or other processing device. During the test, the tester can use one or more cameras, mobile phones, or other recording devices to record the motion of test piece 1 in at least two different spatial dimensions within the test space. Using the xyz spatial coordinate axes as a reference, the two different spatial dimensions can be two spatial dimensions in the x and y directions, two spatial dimensions in the x and z directions, or two spatial dimensions in the z and y directions. After recording, the motion process of test piece 1 can be reviewed and studied using relevant video software. Alternatively, a three-dimensional simulated flow pattern diagram can be generated on a computer or other processing device based on the recorded data. Specifically, based on existing image processing technology, a digital computer and two-dimensional airflow velocity vectors can be used to provide quantified airflow characteristics, and the airflow characteristics can be analyzed using particle image data from a camera or membrane.

[0055] In summary, when using the airflow pattern testing apparatus provided in this embodiment to test airflow, the ability of test piece 1 to float in the airflow can overcome the downward movement tendency of test piece 1 due to gravity, thereby effectively overcoming the inaccuracy problem caused by gravity interference. Therefore, during the test, the entire process of airflow from entering to exiting the test space can be accurately reflected by tracking and recording the movement trajectory of test piece 1 in the test space. This allows for continuous and uninterrupted testing of the airflow, eliminating the need for multiple continuous local tests as used in existing tracer methods. Correspondingly, it eliminates the need for repeated changes of testing equipment and repeated recording at different locations by the testing personnel, effectively simplifying the testing process and improving its convenience. It also prevents the testing personnel from obstructing the airflow during local testing, thus preventing the impact on the accuracy of the test results. Compared to the smoke (mist) method, this test piece 1 does not produce smoke residue, thus avoiding pollution problems.

[0056] Furthermore, due to the non-contamination, stable operation, and good visibility of test piece 1 in this embodiment, it can also be used for airflow pattern testing in areas of any cleanliness level, such as various unidirectional flow, vector flow, and turbulent flow testing processes, and can even be used to study eddies. Compared to the limitations of existing tracer line methods and smoke (mist) methods, which can only be used to test laminar or turbulent flow, the test piece 1 provided in this embodiment can significantly expand the airflow pattern detection range, thus effectively supplementing the current field of airflow pattern testing. Moreover, the test piece 1 provided in this embodiment is simple to operate and easy to carry. Since the test piece 1 is stable, it can also undergo corresponding disinfection or sterilization processes according to the cleanliness level, making it extremely easy to promote.

[0057] It should also be noted that the cleanliness of the test space is strictly required during airflow pattern testing. For example, existing regulations such as EUGMP Appendix 1, China GMP Appendix 1, and FDA guidelines for aseptic production clearly stipulate that clean environments should avoid contamination or cross-contamination, and it should be proven that the air does not originate from unclean areas. Airflow pattern testing is precisely to verify the possibility of contamination, and the testing device and method must also not introduce contamination. The test piece 1 provided in this embodiment has a stable and visible structure, which can adapt well to the sterilization and disinfection process. Furthermore, the test piece 1, due to its sealed cavity and its own density and material, can be described as a lightweight structure, allowing it to float in the airflow and easily move with it. Therefore, the test piece 1 provided in this embodiment can not only perform a continuous and complete airflow pattern test process, but also easily meet the aforementioned regulations and adapt well to current airflow testing specifications.

[0058] like Figure 2As shown, this embodiment also provides a testing device, which includes a release component 2 and the above-mentioned airflow pattern testing tool; the release component 2 includes a frame 20 for accommodating the test piece 1, the frame 20 is provided with a release port, and a blocking member 200 is movably installed at the release port. The blocking member 200 is used to move relative to the release port to open or close the release port, and the test piece 1 is used to be released from inside the frame 20 to the outside when the release port is opened.

[0059] The testing device provided in this embodiment includes the above-mentioned airflow pattern testing tool. Therefore, this testing device and the above-mentioned airflow pattern testing tool can solve the same technical problem and achieve the same technical effect, which will not be described again here.

[0060] The frame 20 is used to support and contain the test piece 1, while the blocking member 200 can open and close the release port to prevent the test piece 1 from falling out of the frame 20 before the test, and to facilitate opening the release port when the test begins so that the test piece 1 can fall out of the frame 20.

[0061] The frame 20 can be a frame structure with mesh or grid-like side walls. In this case, the mesh of the frame 20 itself can be used as a release port. The blocking member 200 can be a structure such as a baffle and the blocking member 200 is slidably connected to the release port. When it is necessary to open the release port, the blocking member 200 can be slid away from the release port.

[0062] It should be noted that using the frame 20 to house the test piece 1 can not only reduce the amount of material used in the test device and reduce the weight of the test device, thereby effectively saving the manufacturing cost of the test device and improving the portability of the test device, but also facilitate the disinfection or sterilization of the frame 20 and the test piece 1 inside it.

[0063] Furthermore, the frame 20 may be provided with multiple receiving parts, each of which is used to receive a test piece 1, and each receiving part is provided with a release port.

[0064] The release ports at multiple receiving parts can be opened and closed by the same blocking member 200, in which case the multiple test pieces 1 can only be released synchronously. Alternatively, the release ports at multiple receiving parts can be opened and closed separately by multiple blocking members 200, in which case the multiple test pieces 1 can not only be released synchronously, but also released in stages.

[0065] Multiple receiving portions can separate multiple test pieces 1, effectively preventing mutual interference between test pieces 1 and affecting their release process. This ensures the simultaneous release effect when multiple test pieces 1 are released at the same time, and also ensures the orderly release of multiple test pieces 1 in stages when they are released in stages.

[0066] In this embodiment, as Figure 2As shown, the frame 20 includes a plurality of support members 201, which are distributed sequentially at intervals, and at least one release port is formed between any two adjacent support members 201 in any group; along the distribution direction of the support members 201, a plurality of release ports located on the same straight line form a release port group, and a blocking member 200 is movably installed at each release port group; the support member 201 and the blocking member 200 at each release port are used to form a receiving part, and each receiving part is used to receive a test piece 1.

[0067] At this time, the blocking component 200 is used to control the simultaneous release process of multiple release ports in its corresponding release port group. During the test airflow, the position of the frame 20 can be adjusted so that the distribution direction of multiple release ports in the release port group is in the same direction as the length direction of the air outlet in the test space. At this time, the test piece 1 released at multiple release ports in the release port group can be released synchronously, which facilitates the comprehensive test of the airflow at the same air outlet.

[0068] It should also be noted that by using the support member 201 and the blocking member 200 at the release port to form a receiving part, the blocking member 200 itself can be used as part of the receiving part, thereby further saving the material of the frame 20. When the release port is opened, it can also effectively improve the smoothness of the test piece 1 exiting the release port, thereby improving the ease of use of the testing device.

[0069] Furthermore, the frame 20 also includes an annular enclosure 202, and multiple support members 201 are fixed to the inner side of the enclosure 202; the blocking member 200 includes an end rod and a middle rod, with an end rod vertically connected to each end of the middle rod, the end rods being hinged to the enclosure 202 and the middle rod being located below the multiple support members 201, and the blocking member 200 being used to rotate relative to the multiple support members 201 to open the release port during rotation close to the support members 201.

[0070] The support member 201 in the frame 20 can also adopt a rod-shaped structure. When the blocking member 200 includes end rods and middle rods, the blocking member 200 can cooperate with the support member 201 to form multiple basket-like fence structures. The fence structure is the receiving part. Each fence structure is used to receive one test piece 1. At this time, not only can the fence structure effectively limit and stably support the test piece 1, but the release port can also be set below the test piece 1. When the blocking member 200 below the test piece 1 rotates relative to the support member 201 and opens the release port, the test piece 1 can be automatically released from the release port under the action of airflow, which facilitates the smooth progress of the test process.

[0071] The enclosure 202 can shield the test piece 1, thereby effectively ensuring the stability of the test piece 1 within the frame 20 before testing and preventing the test piece 1 from being blown off by the airflow.

[0072] The enclosure 202 can adopt a ring-shaped plate structure and the plate surface of the enclosure 202 is perpendicular to the horizontal plane. In this case, the support 201 can be fixed at the bottom edge of the enclosure 202, so that the enclosure 202 can effectively block the test piece 1.

[0073] The ring of the enclosure 202 can be a polygonal ring or a circular ring. When the ring of the enclosure 202 is a polygonal ring, for example, when the enclosure 202 is a rectangular ring, this embodiment preferably has a smooth transition connection at the joints of each side of the enclosure 202. The smooth transition connection makes the inner wall of each corner of the enclosure 202 a smooth arc surface, thereby effectively reducing its resistance to airflow, making it easier for airflow to flow within the frame 20 and blow off the test piece 1.

[0074] It should be noted that when the ring of the enclosure 202 is a polygonal ring, the multiple sides of the enclosure 202 can be detachably connected in pairs. The sides of the enclosure 202 can also be provided with through holes for inserting the support members 201. When the frame 20 is needed for testing, the various sides of the enclosure 202 are connected and fixed using reinforcements such as angle irons, and the multiple support members 201 are inserted into the aforementioned through holes. The detachable connection method of the enclosure 202 and the insertion method between the enclosure 202 and the support members 201 both make the frame 20 easy to store and transport, thereby effectively improving the portability of the testing device.

[0075] To further prevent test piece 1 from falling out of frame 20 before testing, such as Figure 2 As shown, in this preferred embodiment, the frame 20 further includes a top crossbar 203. There are multiple top crossbars 203, and the multiple top crossbars 203 are fixed at intervals at the top edge of the enclosure 202. The test piece 1 is placed between the top crossbar 203 and the support 201. At this time, the top crossbar 203 can effectively prevent the test piece 1 from falling off the top of the frame 20.

[0076] In addition, such as Figure 2 As shown, the release assembly 2 may also include a pull rope 21, and multiple blocking members 200 are connected to the pull rope 21. The pull rope 21 is used to pull the multiple blocking members 200 so that the multiple blocking members 200 rotate relative to the support member 201 at the same time, thereby opening multiple release ports simultaneously.

[0077] Specifically, when it is necessary to open the release port, the pull rope 21 can be pulled to rotate the blocking member 200 from a vertical position to a horizontal position. At this time, the release port is open, there is no obstruction below the test piece 1, and the test piece 1 can be released naturally under the action of airflow. After the test piece 1 has been released, the pull rope 21 can be released, and the blocking member 200 can automatically rotate in the opposite direction and reset under its own weight.

[0078] It can be seen that when the blocking member 200 and the enclosure member 202 are hinged and the blocking member 200 is located below the test member 1, it not only facilitates the test member 1 to exit from the frame 20 after the release port is opened, but also enables the blocking member 200 to automatically reset, thereby effectively improving the ease of use of the test device.

[0079] Furthermore, when multiple blocking elements 200 are connected to the pull rope 21, the pull rope 21 can be used to realize the synchronous rotation of multiple blocking elements 200, thereby realizing the synchronous release of multiple test pieces 1, further improving the ease of use of the testing device. Moreover, the pull rope 21 allows the test personnel to perform the release operation of the test piece 1 from a distance, further preventing the test personnel from obstructing the airflow and affecting the test results.

[0080] In this embodiment, the material of the frame 20 is not limited. In order to facilitate disinfection or high-temperature sterilization according to different cleanliness levels, the frame 20 is preferably made of stainless steel or other metal or alloy materials.

[0081] like Figure 2 As shown, the release component 2 may also include a height adjustment structure 22, which is installed below the frame 20 and is used to adjust the height of the frame 20 above the ground.

[0082] The height adjustment structure 22 not only supports the frame 20, allowing the release port to be suspended, thus facilitating the release of the test piece 1, but also allows the testing device to be adapted to test positions at different heights, thereby further improving the ease of use of the testing device.

[0083] The height adjustment structure 22 can be a telescopic structure. Specifically, the telescopic structure can include a screw and a screw cylinder. The screw cylinder is placed on the ground in the test space, and the screw is threaded into the screw cylinder, with the end of the screw furthest from the screw cylinder rotatably connected to the bottom of the frame 20. Alternatively, the telescopic structure can also use a cylinder, electric push rod, or other telescopic actuator.

[0084] To improve the stability of the frame 20, multiple height adjustment structures 22 can be installed at intervals along the axial direction of the frame 20 assembly below the frame 20.

[0085] Furthermore, such as Figure 2 As shown, a tripod can also be installed below the height adjustment structure 22. The tripod can be folded up and unfolded. When the tripod is unfolded, it can form a stable triangular support under the height adjustment structure 22, thereby further and effectively improving the stability of the frame 20.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An airflow pattern testing device, characterized by, The test piece (1) is spherical in shape. The test piece (1) has an outer diameter of 0.5mm-250mm.

2. The airflow pattern testing tool of claim 1, wherein, The test piece (1) is made of rubber or plastic.

3. The airflow pattern testing tool of claim 1, wherein, The test piece (1) is provided with an inflation hole in communication with the sealed cavity, and a sealing plug (10) is arranged at the inflation hole.

4. The airflow pattern testing tool of claim 3, wherein, The sealing plug (10) is made of rubber.

5. The airflow pattern testing tool of claim 1, wherein, The release assembly (2) comprises a frame (20) for accommodating the test piece (1), and the frame (20) is provided with a release opening, and a blocking piece (200) is movably arranged at the release opening.

6. The airflow pattern testing tool of any one of claims 1-5, wherein, The frame (20) is provided with a plurality of accommodating portions, each of which is used for accommodating one test piece (1), and each of which is provided with one release opening.

7. The airflow pattern testing tool of claim 6, wherein, The frame (20) comprises a plurality of support pieces (201), and the plurality of support pieces (201) are sequentially and spacedly distributed, and at least one release opening is formed between any two adjacent support pieces (201) in any group.

8. The airflow pattern testing tool of any one of claims 1-5, wherein, The density of the test piece (1) is 0.6 g / cm 3 1.8 g / cm 3 .

9. A test device, characterized in that Along the distribution direction of the support piece (201), a plurality of release openings located on the same straight line form a release opening group, and one blocking piece (200) is movably arranged at each release opening group. The support piece (201) and the blocking piece (200) at each release opening are used for surrounding to form an accommodating portion, and each accommodating portion is used for accommodating one test piece (1).

10. The test device of claim 9, wherein, The frame (20) further comprises an annular enclosing piece (202), and the plurality of support pieces (201) are fixed to the inner side of the enclosing piece (202).

11. The test device of claim 10, wherein, The blocking piece (200) comprises an end rod and an intermediate rod, and the two ends of the intermediate rod are respectively connected with one end rod perpendicularly, the end rod is hinged with the enclosing piece (202), and the intermediate rod is located below the plurality of support pieces (201), and the blocking piece (200) is used for rotating relative to the plurality of support pieces (201) to open the release opening in the process of approaching the rotation of the support piece (201). ​ ​ 12. The test device of claim 11, wherein, ​ ​

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