Airflow pattern testing tool, testing device and airflow pattern testing method

Abstract

The invention provides an airflow pattern testing tool, a testing device and an airflow pattern testing method, and relates to the technical field of airflow 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 present invention relates to the technical field of airflow pattern testing, and in particular to an airflow pattern testing tool, a testing device and an airflow pattern testing method. Background Art

[0002] Airflow pattern testing is a method to study the flow trajectory and distribution of air organization in a room, which is very important for controlling pollution and cross-contamination in clean areas.

[0003] At present, there are two main methods for testing airflow patterns: the tracer line method and the smoke (fog) method. The tracer line method refers to fixing lightweight fibers such as nylon monofilaments and cotton threads on the end of a test rod or on a filament grid installed in the airflow, and then observing the direction of the airflow through the changes in the lightweight fibers. The smoke (fog) method refers to passing deionized water through solid carbon dioxide (dry ice) or an ultrasonic atomizer to generate water mist with a diameter of 0.5μm to 50μm as tracer particles, or using titanium tetrachloride (TiCl4) as tracer particles, and observing the propagation and deformation of the tracer particles in the airflow, thereby determining the flow direction and flow characteristics of the airflow.

[0004] As the light fiber is longer, it is more susceptible to gravity interference, thus affecting the test results. Therefore, the tracer line method can only perform local tests on the airflow. Moreover, since the tracer line method often requires many devices to be fixed in one space, the tracer line method cannot fully display the airflow trajectory, the test results are less accurate, and the tracer line method is cumbersome to operate and inconvenient to use. The smoke (fog) method also has the problem that as the smoke (fog) distance increases, the smoke gradually disperses, making it impossible to observe and record. Even if oil mist is used, the diffusion is unclear and affected by the natural downward force of gravity, so the true airflow direction cannot be fully displayed. There is even a problem of smoke residue introducing pollution to the clean area.

[0005] Therefore, both the tracer line method and the smoke (fog) method have the disadvantages of discontinuous testing process and failure to reflect the entire airflow trajectory. The weight of the existing testing tools themselves will cause deviations in the test trajectory, affecting the accuracy of the test results. Summary of the invention

[0006] The purpose of the present invention is to provide an airflow pattern testing tool, a testing device and an airflow pattern testing method to alleviate the technical problems of the tracer line method and the smoke (fog) method for testing airflow pattern in the prior art, both of which have the disadvantages of discontinuous testing process and failure to reflect the entire airflow motion trajectory. The weight of the existing testing tool itself will cause deviation in the test trajectory, affecting the accuracy of the test results.

[0007] In a first aspect, the present invention provides an airflow pattern testing device, comprising a test piece;

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

[0009] In an optional embodiment, there are multiple test pieces, and the multiple test pieces are divided into multiple groups, and the multiple groups of test pieces are respectively used to be arranged at multiple test positions in the space to be tested.

[0010] In an optional embodiment, the test piece is spherical or irregularly spherical in shape.

[0011] In an optional embodiment, the test piece is made of rubber or plastic.

[0012] In an optional embodiment, the test piece is provided with an inflation hole connected to the closed cavity, and a sealing plug is provided at the inflation hole.

[0013] In an optional embodiment, the sealing plug is made of rubber.

[0014] In an optional embodiment, the density of the test piece is 0.6 g / cm 3 ~1.8g / cm 3 .

[0015] In a second aspect, the present invention provides a testing device, comprising a release assembly and an airflow pattern testing tool as described in any one of the aforementioned embodiments;

[0016] The release assembly includes a frame for accommodating the test piece, the frame is provided with a release port, a blocking member is movably installed at the release port, the blocking member 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.

[0017] In an optional embodiment, the frame includes a plurality of support members, the plurality of support members are sequentially spaced apart, and at least one release port is formed in the interval between any group of two adjacent support members;

[0018] Along the distribution direction of the support member, a plurality of release ports located on the same straight line form a release port group, and a blocking member is movably installed at each release port group;

[0019] The supporting member and the blocking member at each release port are used to enclose and form a receiving portion, and each receiving portion is used to receive one of the test pieces.

[0020] In an optional embodiment, the frame further includes an annular enclosure, and the plurality of support members are all fixed to the inner side of the enclosure;

[0021] The blocking member includes an end rod and an intermediate rod, and the two ends of the intermediate rod are respectively vertically connected to an end rod, the end rod is hinged to the enclosure member and the intermediate rod is located below the multiple support members, and the blocking member is used to rotate relative to the multiple support members to open the release port during the process of rotating close to the support member.

[0022] In a third aspect, the present invention provides an airflow pattern testing method, using the airflow pattern testing tool as described in any one of the aforementioned embodiments or the testing device as described in any one of the aforementioned embodiments, comprising:

[0023] S1: placing the test piece in a space to be tested;

[0024] S2: introducing airflow into the space to be tested and releasing the test piece so that the airflow drives the test piece to move, and at the same time observing and recording the movement trajectory of the test piece to determine the movement trajectory of the airflow.

[0025] In an optional implementation, in step S1, if a plurality of test positions are provided in the space to be tested, a plurality of the test pieces are used and the plurality of the test pieces are divided into a plurality of groups, and then the plurality of groups of the test pieces are respectively arranged at the plurality of test positions.

[0026] In an optional embodiment, in step S2, the motion trajectory of the test piece is recorded in at least two different spatial dimensions in the space to be tested by a recording device.

[0027] The airflow pattern test tool provided by the present invention includes a test piece; the surface of the test piece is a curved surface, and a closed cavity is formed inside the test piece, and the closed cavity is filled with gas with a density less than the gas density in the space to be tested, so that the test piece can float under the blowing action of the airflow in the space to be tested and move along the airflow direction. The airflow pattern test tool provided by the present invention is used for airflow pattern testing. Before the test, the test piece can be placed at a test position such as an air outlet in the space to be tested. At this time, the test piece can be supported by an external force applied by a supporting object or a tester, so that the test piece is stably located at the test position, and then the airflow can be introduced into the test position in the space to be tested. While the airflow is introduced, the external force at the test piece is removed, so that the test piece is released. Since a closed cavity is formed inside the test piece and the closed cavity is filled with gas with a density less than the gas density in the space to be tested, the test piece is a light structure with a small weight. When the test piece is released, the test piece can float in the airflow under the blowing action of the airflow and move with the flow of the airflow. In addition, since the surface of the test piece is a curved surface, the air resistance on the surface of the test piece is small, and it is easy to move with the airflow. In the process of the test piece moving with the airflow, the flow trajectory of the airflow can be determined by recording and observing the movement trajectory of the test piece, so as to facilitate the determination of the flow direction, distribution and flow characteristics of the airflow. Compared with the existing tracer line method, the airflow flow pattern test tool provided by the present invention can use the test piece flowing with the airflow to indicate the entire flow trajectory of the airflow, which can fully display the airflow trajectory, and the test result is more accurate. The airflow flow pattern test tool only needs to place and release the test piece during use, and the operation is more convenient. Compared with the existing smoke (fog) method, the airflow flow pattern test tool provided by the present invention can also use the test piece to indicate the entire flow trajectory of the airflow, and the test result is more accurate. The test piece is more stable and easy to observe than smoke, and can fully display the true airflow direction and movement trajectory. At the same time, the test piece is easy to recycle, and there will be no situation of polluting the test space such as smoke residue.

[0028] Compared with the prior art, the airflow pattern testing device provided by the present invention can indicate the overall movement direction of the airflow through the test piece that can float with the airflow and move along the airflow direction. Not only is the test process continuous, it can reflect the entire airflow movement trajectory and improve the test accuracy. It is also easy to operate and will not produce smoke residue to pollute the space to be tested.

[0029] The test device provided by the present invention comprises a release assembly and the above-mentioned airflow pattern test tool; the release assembly comprises a frame for accommodating the test piece, the frame is provided with a release port, a blocking member is movably installed at the release port, the blocking member 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. The test device provided by the present invention comprises the above-mentioned airflow pattern test tool, so the test device has the same beneficial effects as the above-mentioned airflow pattern test tool.

[0030] The airflow pattern test method provided by the present invention uses the above-mentioned airflow pattern test tool or test device, and includes: S1: placing the test piece in the space to be tested; S2: introducing airflow into the space to be tested and releasing the test piece, so that the airflow drives the test piece to move, and at the same time observing and recording the movement trajectory of the test piece to determine the movement trajectory of the airflow. The airflow pattern test method provided by the present invention uses the above-mentioned airflow pattern test tool or test device, so the airflow pattern test has the same beneficial effects as the above-mentioned test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the structure of an airflow pattern testing device provided by an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the structure of a release assembly in a test device provided in an embodiment of the present invention;

[0034] Figure 3 A flow chart of an airflow pattern testing method provided in an embodiment of the present invention.

[0035] Icons: 1-test piece; 10-sealing plug; 2-release assembly; 20-frame; 200-blocking piece; 201-supporting piece; 202-enclosing piece; 203-top crossbar; 21-pull rope; 22-heightening structure. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] Example:

[0040] 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, a closed cavity is formed inside the test piece 1, and the closed cavity is filled with a gas with a density less than the gas density in the space to be tested, so that the test piece 1 can float under the action of the airflow in the space to be tested and move along the airflow direction.

[0041] The airflow pattern test tool provided in this embodiment is used for airflow pattern testing. Before the test, the test piece 1 can be placed at a test position such as an air outlet in the space to be tested. At this time, the test piece 1 can be supported by an external force applied by a supporting object or a tester, so that the test piece 1 is stably located at the test position, and then the airflow can be introduced into the test position in the space to be tested. While the airflow is introduced, the external force at the test piece 1 is removed, so that the test piece 1 is released. Since a closed cavity is formed inside the test piece 1 and the closed cavity is filled with a gas with a density less than the gas density in the space to be tested, the test piece 1 is a light structure with a small weight. After the test piece 1 is released, the test piece 1 can float in the airflow under the action of the airflow and be thrusted by the airflow in the space, and move with the direction of the airflow. In addition, since the surface of the test piece 1 is a curved surface, the air resistance on the surface of the test piece 1 is small, and it is easy to move with the airflow. In the process of the test piece 1 moving with the airflow, the flow trajectory of the airflow can be determined by recording and observing the movement trajectory of the test piece 1, so as to facilitate the determination of the flow direction, distribution and flow characteristics of the airflow.

[0042] Compared with the existing tracer line method, the airflow pattern testing device provided in this embodiment can use the test piece 1 that flows with the airflow to indicate the entire flow trajectory of the airflow, which can fully display the airflow trajectory, and the test results are more accurate. There is no need to change the position of the test device multiple times and there is no need for the tester to record in multiple local test positions in sequence, thereby effectively reducing the number of testers and preventing the testers from blocking the airflow and affecting the test results. In addition, the airflow pattern testing device provided in this embodiment only needs to place and release the test piece 1 during use, which is more convenient to operate.

[0043] Compared with the existing smoke (fog) method, the airflow pattern testing device provided in this embodiment can also use the test piece 1 to indicate the entire flow trajectory of the airflow, and the test result is more accurate. The 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 movement trajectory. At the same time, the test piece 1 is easy to recycle and will not produce smoke residue to pollute the test space.

[0044] Compared with the prior art, the airflow pattern testing device provided in the present embodiment has a test piece 1 with a closed cavity formed inside and a density no greater than the density of the gas in the space to be tested. The test piece 1 can float with the airflow and move along the airflow direction, thereby indicating the overall movement trajectory of the airflow. Not only is the test process continuous, which can reflect the entire airflow movement trajectory and improve the test accuracy, but it is also easy to operate and will not produce smoke residue to pollute the space to be tested. At the same time, it can reduce the tester's obstruction and interference with the airflow, further effectively improving the accuracy of the test results.

[0045] In order to ensure that the test piece 1 is light in weight and can float in the airflow under the action of the airflow, the density of the test piece 1 is preferably small in this embodiment. Specifically, the density of the test piece 1 can be equal to or slightly less than the density of the gas in the space to be tested. For example, the density of the test piece 1 can be 0.6 g / cm 3 ~1.8g / cm 3 Correspondingly, the mass of the test piece 1 can be 0.1 mg to 100 g.

[0046] Furthermore, there are multiple test pieces 1, and the multiple test pieces 1 are divided into multiple groups. The multiple groups of test pieces 1 are respectively used to be set at multiple test positions in the space to be tested, so as to test the airflow movement trajectories at the multiple test positions respectively.

[0047] Each group of test pieces 1 includes at least one test piece 1. In the process of testing the airflow pattern, one or more test pieces 1 can be used for testing according to the test position. For example, when it is necessary to study the airflow pattern in a local space, that is, when there is one test position, one test piece 1 or a group of test pieces 1 can be selected; and when it is necessary to test the airflow pattern at the air outlet in the test space or the airflow out of the high-efficiency filter layer, that is, when there are multiple test positions, multiple groups of test pieces 1 can be selected and placed in multiple test positions respectively. When the test starts, the multiple groups of test pieces 1 are released synchronously or in steps.

[0048] It should be noted that in order to facilitate the distinction of airflow conditions at different test positions, multiple groups of test pieces 1 can be set with different features to facilitate the distinction of each group of test pieces 1. For example, multiple groups of test pieces 1 can use different colors. At this time, test pieces 1 of different colors can respectively represent the motion state trajectory of the airflow at different test positions, which can effectively avoid confusion of motion trajectories caused by confusion between test pieces 1 of the same color.

[0049] It can be seen that, by setting up multiple groups of test pieces 1, this embodiment can study various airflow patterns such as unidirectional flow, vector flow and turbulent flow, and can even study the position and direction of vortices, which helps to study the causes of vortex formation. In addition, since the test piece 1 in this embodiment can float in the air like air after being released, and is thrusted by the flow of air in space, and moves in the direction of airflow, the test piece 1 is not only helpful for studying the movement trajectory and flow direction of airflow in space, but also helps to study the diffusion and distribution of particles in the air with the airflow and the rebound of airflow after encountering contact surface obstruction. In addition, in the process of using the test piece 1 for testing, the possibility of introducing risks to the test space after dynamic simulation intervention by the test personnel can also be tested, so as to better control the pollution and cross-contamination of the clean environment.

[0050] The surface of the test piece 1 in this embodiment is a curved surface, based on which the shape of the test piece 1 can be an irregular sphere such as a sphere or an elliptical sphere. In order to minimize the air resistance of the test piece 1 in the airflow and make the test piece 1 easier to float in the airflow, in this embodiment, the shape of the test piece 1 is preferably a sphere.

[0051] Furthermore, the outer diameter of the test piece 1 may be 0.5 mm to 250 mm.

[0052] In order to effectively reduce the weight of the test piece 1 to ensure that the test piece 1 can float in the airflow, the material of the test piece 1 can be lightweight materials such as rubber and plastic.

[0053] Among them, the plastic can be polyurethane, low-density polyethylene (LDPE) or polypropylene.

[0054] In this embodiment, the material of the test piece 1 is preferably rubber, and the rubber may be natural rubber or synthetic rubber such as styrene-butadiene rubber.

[0055] In addition, the test piece 1 can be divided into multiple layers from the inside to the outside, and from the inside to the outside, the material of the innermost layer of the multi-layer test piece 1 is preferably natural rubber, and the material of the outermost layer is preferably synthetic rubber. This arrangement can make the test piece 1 lighter and easier to move with the airflow.

[0056] In this embodiment, the test piece 1 may be provided with an air filling hole connected to the closed cavity, and a sealing plug 10 is provided at the air filling hole.

[0057] As the test piece 1 is used for a longer time, air leakage occurs in the closed cavity of the test piece 1. When the test piece 1 leaks, air will leak into the closed cavity, thereby increasing the gas density in the test piece 1, and further causing the test piece 1 to gain weight and become difficult to move with the movement of the airflow. Therefore, in this embodiment, the test piece 1 is preferably provided with an inflation hole connected to the closed cavity and a sealing plug 10 is provided at the inflation hole. When the test piece 1 leaks, the sealing plug 10 can be opened and gas with a density less than the gas density in the space to be tested can be added to the closed cavity through the inflation hole. After the inflation is completed, the sealing plug 10 is fixed in the inflation hole to prevent leakage.

[0058] In order to reduce the overall weight of the test piece 1 while ensuring the sealing effect of the sealing plug 10, the sealing plug 10 can also be made of rubber. Furthermore, the sealing plug 10 can be made of polyisoprene rubber, brominated (chlorinated) butyl rubber, hydrogenated nitrile rubber or polyurethane rubber.

[0059] It should also be noted that, in order to facilitate recording the motion trajectory of the test piece 1 so as to analyze the airflow pattern, the airflow pattern test tool provided in this embodiment can also be used in conjunction with a processing device such as a recording device and a computer. During the test, the tester can shoot the motion process of the test piece 1 in at least two different spatial dimensions in the space to be tested through one or more recording devices such as cameras and mobile phones. Taking the xyz spatial coordinate axis as a reference, the above two different spatial dimensions can be two spatial dimensions in the x direction and the y direction, two spatial dimensions in the x direction and the z direction, or two spatial dimensions in the z direction and the y direction. After the shooting is completed, the movement process of the test piece 1 can be replayed and studied through the relevant video software, and a three-dimensional simulated flow pattern diagram can also be generated on a processing device such as a computer based on the shooting data. Specifically, based on the existing image processing technology, a digital computer and a two-dimensional air flow velocity vector can be used to provide quantitative airflow characteristics, and the airflow characteristics can be analyzed through the particle image data on the camera or the membrane.

[0060] In summary, when using the airflow pattern test device provided in this embodiment to test the airflow, the characteristic of the test piece 1 being able to float in the airflow can be used to overcome the downward movement tendency of the test piece 1 due to gravity, thereby effectively overcoming the problem of inaccurate testing caused by gravity interference. Therefore, during the test process, the entire process of the airflow from entering the test space to flowing out of the test space can be accurately reflected by tracking and recording the movement trajectory of the test piece 1 in the test space, thereby performing a continuous and uninterrupted complete test on the airflow, without the need to adopt the multiple continuous local testing method adopted in the existing tracer line method. Correspondingly, there is no need to replace the test device multiple times step by step and there is no need for the tester to record multiple times at a certain position, thereby effectively simplifying the test process and improving the convenience of the test process. At the same time, it can also prevent the tester from blocking the airflow during the local test and affecting the accuracy of the test results. Compared with the smoke (fog) method, the test piece 1 will not produce pollution problems caused by smoke residue.

[0061] In addition, due to the pollution-free, stable use and good visibility of the test piece 1 in this embodiment, the test piece 1 can also be used for airflow pattern testing in any clean level area, such as various unidirectional flow, vector flow and turbulent flow test processes, and can even be used to study eddy currents. Compared with the existing tracer line method and smoke (fog) method, which can only be used to test the defects of laminar flow or turbulent flow, the test piece 1 provided in this embodiment can greatly improve the airflow pattern detection range, thereby effectively supplementing the current airflow pattern testing field. In addition, the test piece 1 provided in this embodiment is simple to operate and easy to carry. Since the state of the test piece 1 is stable, the test piece 1 can also be disinfected or sterilized according to the clean level, which is very easy to promote. It should also be noted that during the airflow pattern test, there are strict requirements for the cleanliness of the test space. For example, the existing regulations EUGMP Appendix 1, China GMP Appendix 1, FDA Aseptic Production Guidelines, etc. clearly stipulate that the clean environment should avoid pollution or cross contamination, and it should be proved that the air will not come from a less clean area. The airflow pattern test is to verify whether there is a possibility of contamination, and the test device and test method cannot cause pollution. The test piece 1 provided in the present embodiment has a stable and visual structure, and can adapt well to the sterilization process. The test piece 1 can be called a lightweight structure due to the closed cavity and its own density and material, so that it can float in the airflow under the action of the airflow and easily flow with the airflow. Therefore, the test piece 1 provided in the present embodiment can not only perform a continuous and complete test process on the airflow flow pattern, but also easily meet the above-mentioned regulations and can adapt well to the current airflow test specifications.

[0062] like Figure 2As shown, this embodiment also provides a testing device, which includes a release component 2 and the above-mentioned airflow pattern testing device; the release component 2 includes a frame 20 for accommodating the test piece 1, and a release port is provided on the frame 20, and a blocking member 200 is movably installed at the release port, and 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 the frame 20 to the outside when the release port is opened.

[0063] The testing device provided in this embodiment includes the above-mentioned airflow pattern testing tool, so the testing device and the above-mentioned airflow pattern testing tool can solve the same technical problems and achieve the same technical effects, which will not be described in detail here.

[0064] The frame 20 is used to support and accommodate the test piece 1, and the blocking member 200 can play the role of opening and closing 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 starting the test so that the test piece 1 can fall out of the frame 20.

[0065] Among them, the frame 20 can adopt a frame structure in which each side wall is in a mesh or grid shape. At this time, the mesh holes of the frame 20 itself can be used as a release port, and the blocking member 200 can adopt a baffle or other structure and the blocking member 200 is slidably connected to the release port. When the release port needs to be opened, the blocking member 200 can be slid in the direction away from the release port.

[0066] It should be noted that using the frame 20 to accommodate the test piece 1 can not only reduce the material usage of 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.

[0067] Furthermore, a plurality of accommodating portions may be provided in the frame 20 , each accommodating portion is used to accommodate a test piece 1 , and each accommodating portion is provided with a release port.

[0068] The release ports at the multiple accommodating parts can be opened and closed by the same blocking member 200, and the multiple test pieces 1 can only be released synchronously. Alternatively, the release ports at the multiple accommodating parts can be opened and closed respectively by multiple blocking members 200, and the multiple test pieces 1 can not only be released synchronously, but also be released in steps.

[0069] Multiple accommodating portions can separate multiple test pieces 1, which can effectively prevent the test pieces 1 from interfering with each other and affecting their release process, thereby effectively ensuring their simultaneous release effect when multiple test pieces 1 are released at the same time, and effectively ensuring the step-by-step and orderly release of multiple test pieces 1 when multiple test pieces 1 are released in steps.

[0070] In this embodiment, if Figure 2As shown, the frame 20 includes a plurality of support members 201, and the plurality of support members 201 are distributed in sequence at intervals, and at least one release port is formed in the interval between any two adjacent support members 201; along the distribution direction of the support members 201, a plurality of release ports located on the same straight line are a release port group, and a blocking member 200 is movably installed at each release port group; the support members 201 and the blocking member 200 at each release port are used to enclose and form a accommodating portion, and each accommodating portion is used to accommodate a test piece 1.

[0071] At this time, the blocking member 200 is used to control the simultaneous release process of multiple release ports in the corresponding release port group. During the airflow testing process, the position of the frame 20 can be adjusted so that the distribution direction of the multiple release ports in the release port group is the same as the length direction of the air outlet in the test space. At this time, the test pieces 1 released from the multiple release ports in the release port group can be released synchronously, which is convenient for comprehensive testing of the airflow at the same air outlet.

[0072] It should also be noted that by utilizing the support member 201 and the blocking member 200 at the release port to surround and form a accommodating portion, the blocking member 200 itself can be utilized as a part of the accommodating portion, thereby further saving material for the frame 20, and when the release port is opened, the smoothness of the process of the test piece 1 exiting the release port can be effectively improved, thereby improving the ease of use of the test device.

[0073] Furthermore, the frame 20 also includes an annular enclosure 202, and multiple support members 201 are fixed on the inner side of the enclosure 202; the blocking member 200 includes an end rod and an intermediate rod, and the two ends of the intermediate rod are respectively vertically connected to an end rod, the end rod is hinged to the enclosure 202 and the intermediate rod is located below the multiple support members 201, and the blocking member 200 is used to rotate relative to the multiple support members 201 to open the release port during the rotation close to the support member 201.

[0074] The support member 201 in the frame 20 may also be a rod-shaped structure. When the blocking member 200 includes an end rod and an intermediate rod, the blocking member 200 may cooperate with the support member 201 to form a plurality of basket-like fence structures. The fence structure is a housing portion. Each fence structure is used to accommodate a test piece 1. At this time, not only can the fence structure be used to effectively limit and stably support the test piece 1, but a release port may 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 to open the release port, the test piece 1 may be automatically released from the release port under the action of airflow, thereby facilitating the smooth progress of the test process.

[0075] The enclosure 202 can shield the test piece 1, thereby effectively ensuring the stability of the test piece 1 in the frame 20 before testing and preventing the test piece 1 from being blown off by airflow.

[0076] The enclosure 202 may be an annular plate structure and the plate surface of the enclosure 202 may be perpendicular to the horizontal plane. In this case, the support member 201 may be fixed to the bottom edge of the enclosure 202 , so that the enclosure 202 may effectively shield the test piece 1 .

[0077] The ring shape of the enclosure 202 can be a polygonal ring or a circular ring. When the ring shape of the enclosure 202 can be a polygonal ring, for example, when the enclosure 202 is a rectangular ring, the present embodiment preferably has smooth transition connection at the connection of each side edge of the enclosure 202. The smooth transition connection mode makes the inner wall at each corner of the enclosure 202 a smooth arc surface, thereby effectively reducing its resistance to airflow, making it easy for the airflow to flow in the frame 20 and blow off the test piece 1.

[0078] It should be noted that when the ring shape of the enclosure 202 is a polygonal ring, the multiple sides of the enclosure 202 can be detachably connected in pairs, and the sides of the enclosure 202 can also be provided with through holes for inserting the support members 201. When the frame 20 needs to be used for testing, the sides of the enclosure 202 are connected and fixed by reinforcing members such as angle irons, and the multiple support members 201 are correspondingly inserted into the above-mentioned through holes. The detachable connection method at the enclosure 202 and the plug-in method between the enclosure 202 and the support members 201 can make the frame 20 easy to store and transport, thereby effectively improving the portability of the test device.

[0079] To further prevent the test piece 1 from falling out of the frame 20 before testing, Figure 2 As shown, the preferred frame 20 of this embodiment also includes a top cross bar 203, there are multiple top cross bars 203, and the multiple top cross bars 203 are fixed at intervals at the top edge of the enclosure 202, and the test piece 1 is placed between the top cross bar 203 and the support member 201. At this time, the top cross bar 203 can effectively prevent the test piece 1 from detaching from the top of the frame 20.

[0080] In addition, if Figure 2 As shown, the release assembly 2 may further include a pull rope 21, and the plurality of blocking members 200 are all connected to the pull rope 21, and the pull rope 21 is used to pull the plurality of blocking members 200 so that the plurality of blocking members 200 rotate relative to the support member 201 at the same time, thereby opening the plurality of release ports at the same time.

[0081] Specifically, when the release port needs to be opened, the pull cord 21 can be pulled to rotate the blocking member 200 from the state of being located on the vertical plane to the state of being located on the horizontal plane. At this time, the release port is open, there is no obstacle under the test piece 1, and the test piece 1 can be naturally released under the action of airflow. After the test piece 1 is released, the pull cord 21 can also be loosened, and the blocking member 200 can automatically rotate in the opposite direction under the action of its own weight and reset.

[0082] It can be seen that when the blocking member 200 is hinged to the enclosure member 202 and the blocking member 200 is located below the test piece 1, it is not only convenient for the test piece 1 to withdraw from the frame 20 after the release port is opened, but also the blocking member 200 can be automatically reset, thereby effectively improving the ease of use of the test device.

[0083] In addition, when multiple blocking members 200 are connected to the pull rope 21, the pull rope 21 can also be used to achieve synchronous rotation of the multiple blocking members 200, thereby achieving synchronous release of multiple test pieces 1, further improving the ease of use of the testing device, and the pull rope 21 allows the tester to release the test piece 1 at a distance, further preventing the tester from obstructing the airflow and affecting the test results.

[0084] In this embodiment, there is no restriction on the material of the frame 20. To facilitate disinfection or high-temperature sterilization according to different cleanliness levels, in this embodiment, the material of the frame 20 is preferably metal or alloy such as stainless steel.

[0085] like Figure 2 As shown, the release assembly 2 may further include a height adjustment structure 22 , which is installed below the frame 20 and is used to adjust the height of the frame 20 from the ground.

[0086] The height adjustment structure 22 can not only support the frame 20 so that the release port is suspended, thereby facilitating the release of the test piece 1, but also enable the test device to adapt to test positions at different heights, thereby further improving the ease of use of the test device.

[0087] The height adjustment structure 22 may be a telescopic structure, specifically, the telescopic structure may include a screw and a barrel, the barrel is used to be placed on the ground in the test space, the screw is threadedly connected in the barrel, and the end of the screw away from the barrel is rotatably connected to the bottom of the frame 20. Alternatively, the telescopic structure may also use a telescopic drive such as a cylinder or an electric push rod.

[0088] In order to improve the stability of the frame 20 , there may be a plurality of height-adjusting structures 22 , which are installed below the frame 20 at intervals along the axial direction of the frame 20 assembly.

[0089] Further, such as Figure 2 As shown, a tripod can be installed below the height adjustment structure 22, and the tripod can be folded and opened. When the tripod is opened, it can form a stable triangular support below the height adjustment structure 22, thereby further effectively improving the stability of the frame 20.

[0090] like Figure 3 As shown, this embodiment also provides an airflow pattern testing method, using the above-mentioned airflow pattern testing tool or testing device, including:

[0091] Step S1: placing the test piece 1 in a space to be tested;

[0092] Step S2: introducing airflow into the space to be tested and releasing the test piece 1 so that the airflow drives the test piece 1 to move, and at the same time observing and recording the movement trajectory of the test piece 1 to determine the movement trajectory of the airflow.

[0093] Since the airflow pattern testing method provided in this embodiment applies the above-mentioned airflow pattern testing tool or testing device, the airflow pattern testing method and the above-mentioned airflow pattern testing tool or testing device can solve the same technical problems and achieve the same technical effects, which will not be repeated here.

[0094] Wherein, in step S1, if a plurality of test positions are provided in the space to be tested, a plurality of test pieces 1 are used and the plurality of test pieces 1 are divided into a plurality of groups, and then the plurality of groups of test pieces 1 are respectively provided at the plurality of test positions.

[0095] Specifically, before performing step S1, a corresponding number of test pieces 1 can be selected according to the test requirements, and step S1 can be performed after the test pieces 1 are selected. It should be noted that when a single test piece 1 is required for airflow pattern testing, the test piece 1 can be taken to the corresponding position by the test personnel in step S1, and then the test piece 1 can be released by releasing the hand in step S2. When multiple test pieces 1 are required for airflow pattern testing, the test pieces 1 can be grouped first, and each group of test pieces 1 can have different characteristics, such as making each group of test pieces 1 have different colors, and then in step S1, the frame 20 in the above-mentioned test device can be used to accommodate multiple groups of test pieces 1, and then in step S2, the multiple groups of test pieces 1 can be released simultaneously or step by step by moving the blocking member 200.

[0096] When the airflow pattern test method provided in this embodiment uses the above-mentioned test device and a recording device, the test device can be first combined and connected according to the air outlet position of the clean room (i.e., the space to be tested) in step S1, and the test piece 1 can be placed in the frame 20, and then the release port in the test device can be placed at the air outlet position. In step S2, airflow can be introduced into the space to be tested and the pull rope 21 can be pulled. At this time, the blocking member 200 opens the release port, and the test piece 1 in the frame 20 is released and floats in the airflow at the same time, and then flows with the direction of the airflow. In step S2, a recording device such as a camera or a mobile phone can also be used to simultaneously record the motion trajectory of the test piece 1 in at least two different spatial dimensions in the space to be tested, thereby recording the motion trajectory of the test piece 1.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An airflow pattern testing device, characterized in that: comprising a test piece (1); The surface of the test piece (1) is curved, a closed cavity is formed inside the test piece (1), and the closed cavity is filled with a gas having a density less than the density of the gas in the space to be tested, so that the test piece (1) can float under the action of the airflow in the space to be tested and move along the direction of the airflow.

2. The airflow pattern testing tool according to claim 1, characterized in that: There are a plurality of test pieces (1), and the plurality of test pieces (1) are divided into a plurality of groups. The plurality of groups of test pieces (1) are respectively used to be arranged at a plurality of test positions in the space to be tested.

3. The airflow pattern testing tool according to claim 1, characterized in that: The test piece (1) is in the shape of a sphere or an irregular sphere.

4. The airflow pattern testing tool according to claim 1, characterized in that: The material of the test piece (1) is rubber or plastic.

5. The airflow pattern testing tool according to any one of claims 1 to 4, characterized in that: The test piece (1) is provided with an air filling hole connected to the closed cavity, and a sealing plug (10) is provided at the air filling hole.

6. The airflow pattern testing tool according to claim 5, characterized in that: The sealing plug (10) is made of rubber.

7. The airflow pattern testing tool according to any one of claims 1 to 4, characterized in that: The density of the test piece (1) is 0.6 g / cm 3 ~1.8g / cm 3 .

8. A testing device, characterized in that: It comprises a release component (2) and an airflow pattern testing device according to any one of claims 1 to 7; The release assembly (2) comprises a frame (20) for accommodating the test piece (1); a release port is provided on the frame (20); a blocking member (200) is movably mounted 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 the frame (20) to the outside when the release port is opened.

9. The testing device according to claim 8, characterized in that: The frame (20) comprises a plurality of support members (201), the plurality of support members (201) are sequentially spaced and distributed, and at least one release port is formed in the interval between any group of two adjacent support members (201); Along the distribution direction of the support member (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 supporting member (201) and the blocking member (200) at each release port are used to enclose and form a receiving portion, and each receiving portion is used to receive a test piece (1).

10. The testing device according to claim 9, characterized in that: The frame (20) further comprises an annular enclosure (202), and the plurality of support members (201) are all fixed to the inner side of the enclosure (202); The blocking member (200) comprises an end rod and an intermediate rod, the two ends of the intermediate rod are respectively vertically connected to one of the end rods, the end rods are hinged to the enclosure member (202) and the intermediate rod is located below the plurality of support members (201), and the blocking member (200) is used to rotate relative to the plurality of support members (201) so as to open the release port during the process of rotating close to the support member (201).

11. An airflow pattern testing method, using the airflow pattern testing tool according to any one of claims 1 to 7 or the testing device according to any one of claims 8 to 10, characterized in that: include: S1: placing the test piece (1) in a space to be tested; S2: introducing airflow into the space to be tested and releasing the test piece (1) so that the airflow drives the test piece (1) to move, while observing and recording the movement trajectory of the test piece (1) to determine the movement trajectory of the airflow.

12. The airflow pattern testing method according to claim 11, characterized in that: In step S1, if a plurality of test positions are provided in the space to be tested, a plurality of the test pieces (1) are used and the plurality of the test pieces (1) are divided into a plurality of groups, and then the plurality of groups of the test pieces (1) are respectively arranged at the plurality of test positions.

13. The airflow pattern testing method according to claim 11, characterized in that: In step S2, the motion trajectory of the test piece (1) is recorded in at least two different spatial dimensions in the space to be tested by a recording device.

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