Powder dispersion test box

Abstract

According to the powder dispersion test box provided by the invention, by improving the structure of the test box, a powder material in the test box can be effectively dispersed, so that the spatial distribution of powder particle concentration in the test box is more uniform, and the accuracy of a dispersion test is improved; and the powder material in the box body after the test can be effectively cleaned. The powder dispersion test box comprises a box body provided with an optical test window, a feeding dispersion unit arranged on the box body, a purging cleaning unit, an air exhaust dust removal unit, and a sensor unit and an illumination unit arranged in the box body, the feeding and dispersing unit is used for dispersing the powder material while conveying the powder material into the box body; the purging and cleaning unit is used for purging and cleaning residual powder materials on the inner wall surface of the box body after the test; the air exhaust and dust removal unit is used for removing residual powder materials in the box body after the test; the sensor unit is used for monitoring the temperature and humidity in the box body and the concentration of powder particles in the box body in real time; the lighting unit is used for adjusting the brightness in the box body.

Description

Technical Field

[0001] The invention relates to a test box, in particular to a powder dispersion test box, and belongs to the technical field of powder dispersion tests. Background Art

[0002] The powder test chamber is mainly used to disperse powder materials (such as powder smoke materials) to form aerosols or similar dispersion systems, supporting concentration, photoelectric effect and other related tests.

[0003] The existing powder dispersion test chamber is equipped with a fan at the bottom of the chamber to disperse the powder. During the test, the powder material is first sprinkled on the bottom of the chamber or sprayed into the chamber through small holes on the side of the chamber. The airflow provided by the fan then disperses the powder material within the chamber space, and the relevant test data is tested. After the powder dispersion test, the powder material is directly extracted using an exhaust fan.

[0004] However, in actual tests, even after the fan is turned on, most of the powder material remains deposited on the bottom of the chamber or accumulates in localized areas such as the corners, rather than being properly suspended within the chamber. This results in a low effective dispersion rate for the powder material and an uneven concentration distribution of the powder material at different locations within the chamber, affecting the accuracy of the test data. Furthermore, directly extracting the powder material with an exhaust fan does not effectively clean it after the test. Summary of the Invention

[0005] In view of this, the present invention provides a powder dispersion test chamber. By improving the structure of the test chamber, the powder material in the test chamber can be effectively dispersed, thereby making the spatial distribution of the powder particle concentration in the test chamber more uniform, thereby improving the accuracy of the dispersion test; and the powder material in the chamber after the test can be effectively cleaned.

[0006] The technical solution of the present invention is: a powder dispersion test chamber, comprising: a chamber provided with an optical test window, a feeding and dispersing unit provided on the chamber, a purge and cleaning unit, an exhaust and dust removal unit, and a sensor unit and a lighting unit provided inside the chamber;

[0007] The feeding and dispersing unit is used to transport the powder material into the box and disperse the powder material at the same time;

[0008] The purging and cleaning unit is used to purge and clean the residual powder material on the inner wall of the box after the test;

[0009] The exhaust and dust removal unit is used to remove residual powder materials in the box after the test;

[0010] The sensor unit is used to monitor the temperature and humidity inside the box and the concentration of powder particles inside the box in real time;

[0011] The lighting unit is used to adjust the brightness inside the box.

[0012] As a preferred embodiment of the present invention, the box body includes a support frame at a lower portion, a box body at a middle portion, and a top cover at an upper portion.

[0013] As a preferred embodiment of the present invention: the feeding and dispersing unit includes: a hopper, a conveying unit and a fan;

[0014] The hopper is used to hold powder materials;

[0015] The lower end of the hopper is connected to the feeding pipe, and the feeding pipe is connected to the internal space of the box;

[0016] The conveying unit is used to convey the powder material in the feeding pipe to the box;

[0017] Several fans are installed in the box to stir and disperse the powder material transported into the box.

[0018] As a preferred embodiment of the present invention, a blower is further included, wherein the air outlet of the blower is connected to the feeding pipe through a blowing pipeline, and is used for blowing the powder material in the feeding pipe into the box.

[0019] As a preferred embodiment of the present invention: the purging and cleaning unit comprises: an air distribution pipe and an air flow nozzle;

[0020] A plurality of air distribution pipes are provided inside the box body, and the air distribution pipes are connected to the air compressor through an external air inlet pipe;

[0021] The air distribution pipe is provided with a plurality of air flow nozzles connected thereto for blowing out positive pressure air flow.

[0022] As a preferred embodiment of the present invention, the air distribution pipe can rotate around its own axis.

[0023] As a preferred embodiment of the present invention: the purge cleaning unit further comprises a window cleaning branch for cleaning and airflow protecting the optical test window;

[0024] The window cleaning branch is led out from the air distribution pipe and includes: a branch pipe connected to the air distribution pipe, and an annular pipe connected to the branch; a plurality of air flow nozzles are arranged on the annular pipe at intervals along the circumference, and the air flow nozzles are connected to the annular pipe, thereby forming a surrounding air flow branch;

[0025] The diameter of the annular tube is larger than the diameter of the optical test window.

[0026] As a preferred embodiment of the present invention: the exhaust and dust removal unit is arranged at the exhaust port of the box body, and includes an exhaust pipe connected to the exhaust port and an exhaust fan connected to the exhaust pipe.

[0027] As a preferred embodiment of the present invention: the box body is further provided with a heating rod and / or a spray unit;

[0028] The heating rod is used to regulate the temperature inside the box;

[0029] The spray unit is used to spray water mist into the box to adjust the humidity inside the box.

[0030] As a preferred embodiment of the present invention: it also includes an integrated control console, which is arranged outside the box and is used to realize integrated control of the feeding and dispersing unit, the blowing and cleaning unit, the exhaust and dust removal unit and the lighting unit, and real-time display of the measurement data of the sensor unit.

[0031] Beneficial effects:

[0032] (1) The powder dispersion test box of the present invention is provided with a feeding and dispersing unit capable of conveying and dispersing powder materials, which can disperse the powder materials while conveying the powder materials into the box, so that the powder materials entering the test box are effectively dispersed; at the same time, a purging and cleaning unit is provided for purging the residual powder materials on the inner wall surface of the box after the test, which can effectively prevent the powder materials from being adsorbed on the inner wall surface of the box after the test. The purging and cleaning unit cooperates with the exhaust and dust removal unit to effectively clean the powder materials remaining in the box after the test.

[0033] (2) In the powder dispersion test chamber of the present invention, the feeding and dispersing unit adopts a conveying unit, a fan and a blower in combination, which can continuously convey and disperse the powder material into the chamber, avoid the powder material from accumulating on the bottom surface of the chamber, and make the powder material inside the test chamber more evenly distributed.

[0034] (3) In the powder dispersion test chamber of the present invention, the purging and cleaning unit adopts an airflow nozzle to blow out a positive pressure airflow to purge the inner wall surface of the chamber, which has a simple structure and high cleaning efficiency.

[0035] (4) The powder dispersion test chamber of the present invention is further provided with a window cleaning branch, which can not only be used to provide airflow protection to the optical test window during the test to prevent the powder material from being adsorbed on the optical test window and affecting the test accuracy during the test; but can also be used to clean the optical test window after the test.

[0036] (5) In the powder dispersion test chamber of the present invention, the temperature and humidity inside the chamber can be regulated by setting a heating rod and a spray unit to meet different test requirements.

[0037] (6) In the powder dispersion test chamber of the present invention, by providing an integrated control console, it is possible to achieve integrated control of the test process and real-time display of the test data during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The overall structure of the powder dispersion test box of the present invention is shown in FIG. Figure 1 ;

[0039] Figure 2 The overall structure of the powder dispersion test box of the present invention is shown in FIG. Figure 2 ;

[0040] Figure 3 Schematic diagram of the internal structure of the powder dispersion test box of the present invention Figure 1 ;

[0041] Figure 4 Schematic diagram of the internal structure of the powder dispersion test box of the present invention Figure 2 ;

[0042] Figure 5 Schematic diagram of the arrangement of the purge cleaning unit in the powder dispersion test chamber of the present invention;

[0043] Figure 6 This is a schematic diagram of the fan arrangement inside the box;

[0044] Figure 7 This is a schematic diagram of the test chamber top cover;

[0045] Figure 8 It is a structural diagram of the support frame and the box body;

[0046] Wherein: 1- box body, 11- support frame, 111- frame, 112- cover plate, 113- moving wheel, 12- box body, 121- door, 122- optical test window, 123- bottom plate, 13- top cover, 14- lighting lamp, 15- heating rod, 16- spray unit, 17- temperature and humidity sensor;

[0047] 2-feeding dispersion unit, 21-hopper, 22-feeding pipe, 23-conveying unit, 24-blower, 25-screw, 26-blowing pipeline, 27-pressure balance pipeline, 28-fan;

[0048] 3-purge cleaning unit, 31-air distribution pipe, 32-air flow nozzle, 33-motor, 34-drive shaft, 35-drive reversing unit;

[0049] 4-exhaust dust removal unit, 41-exhaust port, 42-exhaust duct. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0051] This embodiment provides a powder dispersion test chamber, which can effectively disperse the powder material in the test chamber, thereby making the spatial distribution of the powder particle concentration in the test chamber more uniform, and can effectively clean the powder material in the chamber after the test.

[0052] As an example, the powder material is a smoke powder material.

[0053] like Figure 1 and Figure 2 As shown, the powder dispersion test box includes: a box body 1, a feeding and dispersing unit 2 arranged on the box body 1, a purge and cleaning unit 3, an exhaust and dust removal unit 4, and a sensor unit and a lighting unit arranged inside the box body 1.

[0054] The box body 1 is divided into three parts from bottom to top, namely a support frame 11 at the bottom, a box body 12 at the middle, and a top cover 13 at the top.

[0055] The support frame 11 is used to support the box body 12, and the top cover 13 is used to close the top opening of the box body 12 and to install the lighting unit.

[0056] As an example, the support frame 11, the box body 12 and the top cover 13 are all made of aluminum alloy frame and stainless steel plate, which is easy to disassemble and replace. Figure 8 As shown, the support frame 11 is a cubic structure, comprising an aluminum alloy support frame 111 and several sealing panels 112 surrounding the four sides of the support frame 111; the sealing panels 112 are made of stainless steel and are installed in slots in the aluminum alloy. The bottom of the support frame 111 is equipped with four movable wheels 113 to facilitate the movement of the test chamber.

[0057] The interior of the box body 12 is the test space for the powder dispersion test. The box body 12 is a cubic structure with openings at the top and bottom and a closed perimeter. The entire frame is constructed of aluminum alloy profiles, and the four side panels are made of stainless steel sheets covered with acrylic sheets (the panels are installed in conjunction with the aluminum alloy profile slots). Holes are opened in the panels on the left and right sides of the box body 12 for installing optical test windows 122. Two optical test windows 122 coaxially arranged on the left and right sides constitute a group. In this example, a total of three groups of optical test windows 122 are provided. The test windows 122 can be made of materials that transmit visible light, infrared, dual-band lasers, and millimeter-wave optical materials. To facilitate the replacement of the optical test windows 122, a connecting flange is provided at the opening in the box body 12 for installing the optical test windows 122. The optical test windows 122 are connected to the connecting flange via a flange plate, thereby making the optical test windows 122 removable and replaceable.

[0058] A door 121 is installed on the sealing plate of the front end surface of the box body 12 for personnel to enter and exit and conduct maintenance.

[0059] like Figure 3-Figure 5 As shown, the chamber 1 is equipped with several feeding and dispersing units 2 for conveying and dispersing powdered material into the chamber body 12. As an example, one feeding and dispersing unit 2 is positioned on each of the left and right sides of the front panel of the chamber 1. The feeding and dispersing units 2 disperse the powdered material, ensuring a more even distribution of the powdered material within the chamber.

[0060] like Figure 3 As shown, the feeding and dispersing unit 2 includes: a hopper 21, a conveying unit 23, a blower 24 and a fan 28; wherein the hopper 21 is used to hold powder materials; the lower end of the hopper 21 is connected to the feeding pipe 22, and the feeding pipe 22 is connected to the internal space of the box body 12 to realize feeding into the box body 12.

[0061] As an example, the feeding pipe 22 feeds material into the interior of the box body 12 through a feeding port provided on the bottom plate 123 of the box body 12 (the feeding pipe 22 is connected to the feeding port provided on the bottom plate 123 of the box body 12).

[0062] As an example, the hopper 21 adopts a barrel-shaped structure with a cylindrical upper portion and a conical bottom, and the small end of the bottom cone is connected to the feeding pipe 2.

[0063] As an example, the top opening of the hopper 21 is provided with an upper cover which can be opened and closed and is sealed by a sealing ring.

[0064] In the feeding and dispersing unit 2, the powder material in the hopper 21 enters the box body 12 from the feeding pipe 22 under the action of the conveying unit 23 and the blower 24; the conveying unit 23 is used to convey the powder material entering the feeding pipe 22 forward (that is, toward the box body 12); the blower 24 is used to blow the powder material conveyed by the conveying unit 23 into the box body 12, that is, the feeding and dispersing unit 2 adopts the conveying unit 23 to convey and the blower 24 to blow to convey the powder material into the box body 12.

[0065] As an example, the conveying unit 23 adopts a screw conveying method, and the mechanical thrust generated by the rotation of the screw 25 continuously conveys the powder material from the hopper 21 to the feeding port. The blower 24 blows the powder material conveyed by the screw 25 into the box body 12 by generating positive pressure, and assists in dispersing the powder material.

[0066] To this end, the conveying unit 23 includes a screw 25 and a drive motor. The drive motor is used to drive the screw 25 to rotate. One end of the screw 25 is connected to the drive motor, and the other end extends into the feed tube 22. The portion of the screw 25 located within the feed tube 22 is provided with spiral blades. As the screw 25 rotates, it conveys the powder material entering the feed tube 22 from the lower end of the hopper 21 forward. This conveying method can achieve continuous conveying of powder materials.

[0067] As an example, the conveying unit 23 adjusts the rotation speed through a frequency converter to achieve the feeding flow regulation function.

[0068] The air outlet of the blower 24 is connected to the feeding pipe 22 through the blowing pipe 26, and the connection position is located at the front end of the screw 25, that is, the connection side of the feeding pipe 22 and the box body 12. The powder material transported by the screw 25 is blown into the box body 12 through the blower 24.

[0069] As an example, the air inlet of the blower 24 is in communication with the box body 12 , borrows the air from the box body 12 (to prevent the air outside the box body 12 from entering), and flows back into the box body 12 .

[0070] As an example, the upper portion of the hopper 21 is connected to the box body 12 via a pressure balancing pipe 27, so as to balance the pressures in the hopper 21 and the box body 12, thereby utilizing the output of the powder material.

[0071] There are several fans 28 distributed on the bottom plate 123 of the box body 12. The fans 28 can stir and disperse the powder material delivered to the box body 12 through the feeding port, so that it is fully and evenly dispersed in the box body 12 and in a suspended state, so as to carry out relevant tests later. Figure 5 As shown, eight fans 28 are arranged on the bottom plate 123 of the cabinet body 12, in two rows of four fans each. The fans 28 are frequency-controlled, with an adjustable speed of 0 to 3000 rpm. Each fan 28 can be independently controlled, allowing any fan 28 to be activated as needed.

[0072] The purging and cleaning unit is arranged on the box body 12 and is used to purge and clean the residual powder material on the inner wall of the box body 12 after each test. Figure 2-Figure 4 As shown, the purge cleaning unit includes an air distribution duct 31 and air flow nozzles 32 (e.g., a hood). The air distribution duct 31 is supported on the inner wall of the main body 12. One end of the air distribution duct 31 extends out of the main body 12 and is connected to the air compressor via a hose. (The air flow path is sealed at the point where the air distribution duct 31 extends out of the main body 12.) Each air distribution duct 31 is mounted with several air flow nozzles 32, which are connected to the air distribution duct 31, with the air outlet of the air flow nozzle 33 facing the inner wall of the main body 12. At least one air distribution duct 31 is provided for each inner wall of the main body 12.

[0073] Thus, an external air compressor provides compressed air to the air distribution pipe 31, and the compressed air in the air distribution pipe 31 is blown out by the air flow nozzle 32, forming a positive pressure airflow toward the inner wall of the box body 12, thereby purging the residual powder adsorbed on the inner wall of the box body 12. This purging and cleaning unit can purge the residual powder adsorbed on the inner wall of the box body 12, achieving rapid and efficient cleaning of the smoke and powder particles in the box body 12 after the test.

[0074] As an example, Figure 7 As shown, a number of air distribution pipes 31 are also arranged on the top cover 13 . The air distribution pipes 31 are supported on the top cover 13 . Each air distribution pipe 31 is also equipped with a number of air flow nozzles 32 , which can be used to blow the inner surface of the top cover 13 .

[0075] As an example, both ends of the air distribution duct 31 are rotatably supported on the housing body 12 (e.g., via bearings), allowing the air distribution duct 31 to rotate 360° around its own axis to achieve efficient cleaning of the inner wall of the housing body 12. Specifically, one end of the air distribution duct 21 extends out of the housing body 12 and is connected to a hose in a dynamic seal manner. The other end extends out of the housing body 12 and is connected to a power unit, which drives the air distribution duct 31 to rotate 360° around its own axis.

[0076] As an example, a power unit, such as a rotating motor, may be provided for each air distribution duct 31 .

[0077] As another example, Figure 5 As shown, two air distribution pipes 31 located in the same horizontal plane and in the same direction are grouped together and driven by a power unit to rotate around their own axes. At this time, the power unit includes: a motor 33, a transmission shaft 34 and two transmission reversing units 35. The motor 33 is arranged at one end of the transmission shaft 34 to drive the transmission shaft 34 to rotate around its own axis. A transmission reversing unit 35 (such as a gear transmission reversing mechanism) is provided at each position on the transmission shaft 34 corresponding to the two air distribution pipes 31 in the corresponding group to realize transmission reversal to drive the corresponding air distribution pipe 31 to rotate around its own axis.

[0078] To clean the optical test windows 122 on the side cover of the box body 12 and protect them from airflow, thereby preventing powder from adsorbing onto the optical test windows 122, the purge cleaning unit is further provided with a window cleaning branch (not shown in the figure) for cleaning the optical test windows 122. Each optical test window 122 is provided with a window cleaning branch to clean the optical glass of the optical test window 122.

[0079] As an example, the window cleaning branch is derived from the air distribution duct 31 corresponding to the cover plate where the optical test window 122 is located. It includes a branch duct connected to the air distribution duct 31 and an annular tube connected to the branch duct. The annular tube is circumferentially spaced with several airflow nozzles that connect to the annular tube, forming a circular airflow branch. The diameter of the annular tube is larger than that of the optical test window 122, so as not to affect the optical path of the optical test window 122.

[0080] During the test, the surrounding airflow branch can be started to protect the optical test window 122 to prevent the powder material from being adsorbed on the optical test window 122 and affecting the test accuracy; after the test, the surrounding airflow branch is started to clean the optical test window 122.

[0081] It is worth noting that the air distribution duct 31 provided with the window cleaning branch does not have the function of rotating 360° around its own axis.

[0082] like Figure 7 As shown, the exhaust dust removal unit 4 is arranged at the exhaust port 41 of the test box top cover 13, including an exhaust pipe 42 arranged at the exhaust port 41 of the test box top cover 13 and an exhaust fan connected to the exhaust pipe 42; after each test is completed, the purge cleaning unit 3 is started to realize the purge and cleaning function of the residual powder adsorbed on the inner wall and window of the box body 12, and then cooperates with the exhaust dust removal unit 4 to extract the smoke and powder particles in the box body 12 after the test through the exhaust fan, so as to realize fast and efficient cleaning of the box body 12.

[0083] In addition, the fan 28 provided on the bottom plate 123 of the box body 12 can also be used to assist in dust removal. When cleaning the box body 12 , the purge cleaning unit 3 and the fan 28 are started to cooperate with the exhaust dust removal unit 4 .

[0084] like Figure 7 As shown, the lighting units are disposed on the inner surface of the top cover 13. As an example, one lighting unit is disposed on each side of the exhaust vent 41 on the inner surface of the top cover 13, and the units are symmetrically arranged. Each lighting unit includes two illuminating lamps 14 disposed front and back, and the light intensity of the illuminating lamps 14 is adjustable to meet different experimental requirements.

[0085] The sensor unit includes: a concentration sensor and a temperature and humidity sensor 17; a plurality of temperature and humidity sensors 17 are arranged on the box body 12, such as Figure 4 As shown, it serves as a temperature and humidity monitoring point to monitor the temperature and humidity inside the box body 12 in real time.

[0086] In addition, a number of concentration sensors are arranged on the box body 12 as concentration sampling points, and the concentration sampling of the powder particles in the box body 12 is achieved by a filtration method.

[0087] Furthermore, in order to achieve the regulation of temperature and humidity inside the box body 12, a heating rod 15 and a spray unit 16 are also provided on the inner surface of the top cover 13; the heating rod 15 regulates the temperature inside the box body 12 by heating, and the spray unit 16 is connected to an external water pipe for spraying water mist onto the box body 12 to adjust the humidity inside the box body 12.

[0088] As an example, when a spray unit 16 is provided on the inner surface of the top cover 13 , a sewage outlet is further provided on the bottom plate of the box body 12 .

[0089] As an example, the test chamber also includes an integrated control console, which is arranged outside the test chamber body and is used to realize integrated control of the feeding and dispersing unit 2, the blowing and cleaning unit 3, the exhaust and dust removal unit 4, the lighting unit, etc., as well as real-time display of the measurement data of the sensor unit.

[0090] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A powder dispersion test chamber, characterized by: include: A box (1) provided with an optical test window (122), a feeding and dispersing unit (2) provided on the box (1), a purge and cleaning unit (3), an exhaust and dust removal unit (4), and a sensor unit and a lighting unit provided inside the box (1); The feeding and dispersing unit (2) is used to transport the powder material into the box (1) and disperse the powder material at the same time; The purging and cleaning unit is used to purge and clean the residual powder material on the inner wall of the box (1) after the test; The exhaust and dust removal unit (4) is used to remove residual powder materials in the box (1) after the test; The sensor unit is used to monitor the temperature and humidity in the box (1) and the concentration of powder particles in the box (1) in real time; The lighting unit is used to adjust the brightness inside the box (1).

2. The powder dispersion test chamber according to claim 1, wherein: The box body (1) comprises a support frame (11) at the bottom, a box body (12) at the middle, and a top cover (13) at the top.

3. The powder dispersion test chamber according to claim 1 or 2, characterized in that: The feeding and dispersing unit (2) comprises: a hopper (21), a conveying unit (23) and a fan (28); The hopper (21) is used to hold powder materials; The lower end of the hopper (21) is in communication with a feeding pipe (22), and the feeding pipe (22) is in communication with the internal space of the box (1); The conveying unit (23) is used to convey the powder material in the feeding pipe (22) to the box (1); Several fans (28) are installed in the box (1) for stirring and dispersing the powder material transported into the box (1).

4. The powder dispersion test chamber according to claim 3, wherein: It also includes a blower (24), the air outlet of the blower (24) is connected to the feeding pipe (22) through a blowing pipeline (26), and is used to blow the powder material in the feeding pipe (22) into the box (1).

5. The powder dispersion test chamber according to claim 1 or 2, characterized in that: The purging and cleaning unit comprises: an air distribution pipe (31) and an air flow nozzle (32); A plurality of air distribution pipes (31) are provided inside the box (1), and the air distribution pipes (31) are connected to the air compressor via an external air inlet pipe; The air distribution pipe (21) is provided with a plurality of air flow nozzles (24) in communication therewith, for blowing out positive pressure air flow.

6. The powder dispersion test chamber according to claim 5, characterized in that: The air distribution pipe (31) is capable of rotating around its own axis.

7. The powder dispersion test chamber according to claim 5, characterized in that: The purge cleaning unit further comprises a window cleaning branch for cleaning and airflow protection of the optical test window (122); The window cleaning branch is led out from the air distribution pipe (31), and comprises: a branch pipe connected to the air distribution pipe (31), and an annular pipe connected to the branch; a plurality of air flow nozzles are arranged on the annular pipe at intervals along the circumference, and the air flow nozzles are connected to the annular pipe, thereby forming a surrounding air flow branch; The diameter of the annular tube is larger than the diameter of the optical test window (122).

8. The powder dispersion test chamber according to claim 1 or 2, characterized in that: The exhaust and dust removal unit (4) is arranged at the exhaust port (41) of the box body (1), and comprises an exhaust pipe (42) connected to the exhaust port (41) and an exhaust fan connected to the exhaust pipe (42).

9. The powder dispersion test chamber according to claim 1 or 2, characterized in that: The box (1) is further provided with a heating rod (15) and / or a spray unit (16); The heating rod (15) is used to regulate the temperature inside the box (1); The spray unit (16) is used to spray water mist into the box (1) to adjust the humidity in the box (1).

10. The powder dispersion test chamber according to claim 1 or 2, characterized in that: It also includes an integrated control console, which is arranged outside the box (1) and is used to achieve integrated control of the feeding and dispersing unit (2), the blowing and cleaning unit (3), the exhaust and dust removal unit (4) and the lighting unit, as well as real-time display of measurement data of the sensor unit.

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