A test box

Abstract

The present invention relates to the technical field of test equipment, and discloses a test box, which includes a box body, a bracket, two first air chambers, a drive assembly, and an adjustment assembly. The bracket is arranged in the box body, and the bracket is provided with a plurality of bearing positions arranged in a vertical direction, each bearing position being capable of bearing a workpiece to be tested; the two first air chambers are symmetrically arranged on both sides of the bracket, and each first air chamber is provided with a plurality of ventilation holes arranged in a vertical direction and facing the bracket, the ventilation holes of the two first air chambers are arranged one by one opposite each other, and each bearing position is located between two opposite ventilation holes; the drive assembly is configured to drive the wind in the box body to flow into the first air chamber from the air inlet of the first air chamber, then flow out through the ventilation holes, and blow toward the surface of the workpiece to be tested on the corresponding side. The two opposite surfaces of the workpiece to be tested in the test box are both windward surfaces, which can improve the test accuracy of the workpiece to be tested, and the temperature at each bearing position in the box body is uniform.

Description

[0001] This application is a divisional application of the patent application with application number 202011120512.3 (the application date of the original application is October 19, 2020, and the name of the invention is A test chamber). Technical Field

[0002] The present invention relates to the technical field of test equipment, in particular to a test box. Background Art

[0003] The test chamber is used to provide a test environment with different temperatures to test the various performance indicators of workpieces such as electronic equipment at different temperatures.

[0004] Existing test chambers typically utilize a circulating airflow system, controlling the temperature of various locations within the chamber by circulating air within the chamber. However, most existing temperature test chambers utilize a single-direction airflow system, which results in one end of the test object facing the wind and the other end facing the wind. This can affect the measured temperature depending on the position and angle of the test object within the chamber, leading to significant deviations in test results. Summary of the Invention

[0005] The object of the present invention is to provide a test box with good uniformity, which can avoid test temperature deviation caused by different placement positions and angles of workpieces to be tested.

[0006] To this end, the present invention adopts the following technical solutions:

[0007] A test box, comprising a box body, and further comprising:

[0008] A bracket, the bracket being arranged in the box, and the bracket being provided with a plurality of bearing positions arranged in a vertical direction, each of the bearing positions being capable of bearing a workpiece to be tested;

[0009] Two first air chambers, the two first air chambers are symmetrically arranged on both sides of the bracket, each of the first air chambers is provided with a plurality of ventilation holes arranged in a vertical direction and facing the bracket, the ventilation holes of the two first air chambers are arranged one by one opposite to each other, and each of the bearing positions is located between two opposite ventilation holes;

[0010] a driving assembly configured to drive the air in the box to flow from the air inlet of the first air chamber into the first air chamber, then out through the vents, and blow toward the surface of the workpiece to be tested on the corresponding side;

[0011] Also included is an adjustment component, the adjustment component being configured to be able to adjust the air outlet direction and air outlet volume of the vent;

[0012] The adjustment assembly includes a plurality of adjustment plates, which are rotatably disposed in the first air chamber and correspond one-to-one to the ventilation holes;

[0013] The adjustment plate is provided with through holes so that part of the wind can be adjusted by the adjustment plate and flow out from the ventilation hole while the other part of the wind can continue to flow in the first air chamber and flow out from the next ventilation hole. In the same first air chamber, the angle between the adjustment plate and the horizontal plane gradually increases from bottom to top.

[0014] Preferably, each of the carrying positions can carry a plurality of the workpieces to be tested.

[0015] Preferably, when testing the workpiece to be tested, the workpiece to be tested is placed on the supporting position. During the test, wind flows into the first air chamber from the air inlet of each first air chamber, and then flows out from the two ventilation holes opposite to each of the supporting positions. Both sides of the workpiece to be tested are windward surfaces.

[0016] Preferably, a second air chamber is further included, and both ends of the second air chamber are respectively connected to the two first air chambers. The wind flowing out of the ventilation holes can flow into the second air chamber after passing through the surface of the workpiece to be tested, and then flow out from the ventilation holes of the first air chamber.

[0017] Preferably, the driving assembly includes two fans, and the fans are connected to the air inlet.

[0018] Preferably, the fans are symmetrically arranged on both sides of the bracket.

[0019] Preferably, the device further comprises a temperature regulating component, wherein the temperature regulating component is configured to regulate the temperature of wind blowing onto the surface of the workpiece to be tested.

[0020] Preferably, the temperature adjustment assembly includes an evaporator and a heater, the evaporator is configured to reduce the temperature of the wind blowing onto the surface of the workpiece to be tested, and the heater is configured to increase the temperature of the wind blowing onto the surface of the workpiece to be tested.

[0021] Preferably, there are multiple temperature adjustment components.

[0022] Preferably, the temperature regulating assembly is arranged in the second air chamber, and a plurality of the temperature regulating assemblies are symmetrically arranged along the central axis of the bracket.

[0023] Beneficial effects of the present invention:

[0024] The test box proposed by the present invention includes a box body, a bracket, two first air chambers and a drive assembly. The bracket is arranged in the box body, and a plurality of bearing positions arranged in a vertical direction are provided on the bracket. Each bearing position can bear the workpiece to be tested, and multiple bearing positions can improve the test efficiency; the two first air chambers are symmetrically arranged on both sides of the bracket, and each first air chamber is provided with a plurality of ventilation holes arranged in a vertical direction and facing the bracket. The ventilation holes of the two first air chambers are arranged one by one, and each bearing position is located between two opposite ventilation holes, which can ensure that the workpieces to be tested on multiple bearing positions are The consistency of the test conditions; the driving component is configured to drive the wind in the box to flow into the first air chamber from the air inlet of the first air chamber, and then flow out through the ventilation holes, and blow to the surface of the workpiece to be tested on the corresponding side. The two opposite surfaces of the workpiece to be tested in the test box are both windward surfaces, which avoids the test temperature difference caused by one side being the windward surface and the other side being the leeward surface. The setting of multiple ventilation holes makes the temperature of each load position in the test box consistent, and the test box has high uniformity, which can avoid the temperature test deviation caused by different placement positions and angles of the workpiece to be tested, and improve the test accuracy of the workpiece to be tested.

[0025] The test chamber also includes an adjustment assembly configured to adjust the direction and volume of air flowing out of the vents. This adjustment can be tailored to the type of workpiece to be tested and the test requirements, thereby increasing the functionality of the test chamber and broadening its scope of application. Specifically, the adjustment assembly includes a plurality of adjustment plates rotatably disposed within the first air chamber and corresponding to each of the vents. When air flows into the first air chamber from the air inlet, the adjustment plates rotate at different angles, causing the wind flow direction and the angle formed between the adjustment plates to vary, thereby adjusting the direction of air flowing out of the vents. The adjustment plates are provided with through-holes, allowing some air to flow out of the vents while the adjustment plates regulate the air flow, while another portion of the air continues to flow through the first air chamber and out of the next vent. The smaller the angle between the adjustment plates and the horizontal, the more air flows out of the through-holes on the adjustment plates. Therefore, within the same first air chamber, the angle between the adjustment plates and the horizontal plane gradually increases from bottom to top, ensuring a uniform airflow across the surface of the workpieces to be tested at each loading position. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 1 is a schematic structural diagram of a test box carrying a workpiece to be tested provided by an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the air circulation process in the box provided by an embodiment of the present invention.

[0028] In the picture:

[0029] 1. Box; 2. Bracket; 3. Workpiece to be tested;

[0030] 4. First air chamber; 41. Ventilation hole; 42. Adjustment plate;

[0031] 5. Second air chamber; 6. Fan; 7. Temperature regulation component. DETAILED DESCRIPTION

[0032] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0033] like Figure 1-Figure 2 As shown, this embodiment provides a test box, including a box body 1, a bracket 2, two first air chambers 4 and a drive assembly. The bracket 2 is arranged in the box body 1, and is provided with a plurality of bearing positions arranged in the vertical direction on the bracket 2. Each bearing position can bear a workpiece 3 to be tested. Testing multiple workpieces 3 to be tested at one time can improve the efficiency of the test; the two first air chambers 4 are symmetrically arranged on both sides of the bracket 2, and each first air chamber 4 is provided with a plurality of ventilation holes 41 arranged in the vertical direction and facing the bracket 2. The ventilation holes 41 of the two first air chambers 4 are arranged one by one opposite to each other, and each bearing position is located between two opposite ventilation holes 41; the drive assembly is configured to drive the wind in the box body 1 to flow into the first air chamber 4 from the air inlet of the first air chamber 4, then flow out through the ventilation holes 41, and blow toward the surface of the workpiece 3 to be tested on the corresponding side. When testing the workpiece 3 to be tested, the workpiece 3 to be tested is placed on a load-bearing position. During the test, air flows into the first air chamber 4 from the air inlet of each first air chamber 4 and then flows out from the two vents 41 directly opposite each load-bearing position, so that both sides of the workpiece 3 to be tested are windward, avoiding temperature differences caused by one side facing the wind and the other side leeward. The provision of multiple ventilation holes 41 ensures that the temperature at each load-bearing position in the test chamber is consistent, and the test chamber has high uniformity and precision. This can avoid test errors caused by the placement position and placement angle of the workpiece 3 to be tested, thereby improving the test accuracy of the workpiece 3 to be tested. According to tests conducted in accordance with standard GB / T 5170.2-2017, the test chamber can meet the performance requirements of uniformity of ≤2 degrees at nine points in the box body 1 when unloaded and uniformity of ≤2 degrees at nine points in the box body 1 when loaded. Standard GB / T 5170.2-2017 is a national standard for environmental test equipment inspection methods, which will not be described in detail here. In this embodiment, the workpiece 3 to be tested is a self-heating battery with a power of 10W. The test chamber can meet the requirement that the temperature uniformity within 10mm of the center point of the surface of the self-heating battery is ≤2 degrees.

[0034] Specifically, the bearing position is set in the middle position of the bracket 2, and both sides of the workpiece 3 to be tested set on the bearing position can be affected by the wind flowing out from the ventilation holes 41 on the two first air chambers 4, so that both sides of the workpiece 3 to be tested are windward surfaces, so that both sides of the workpiece 3 to be tested are evenly affected by the wind, thereby ensuring the accuracy of the test results.

[0035] In order to further improve the test efficiency, each bearing position can bear multiple workpieces 3 to be tested. In this embodiment, two workpieces 3 to be tested are arranged on each bearing position, and the two workpieces 3 to be tested are arranged symmetrically along the central axis of the bracket 2. Figure 1 and Figure 2 As shown, one side of the workpiece 3 to be tested is close to the ventilation holes 41 of one of the first air chambers 4, while the other side of the workpiece 3 to be tested faces the ventilation holes 41 of the other first air chamber 4. The wind flowing out of the closer ventilation hole 41 directly blows onto the corresponding surface of the workpiece 3 to be tested, while the other side of the workpiece 3 to be tested can be partially exposed to the wind flowing out of the farther ventilation hole 41. Furthermore, if other load positions and ventilation holes 41 are provided above the load position, some of the wind flowing out of the ventilation holes 41 on both sides of the upper layer can also blow onto the other side of the workpiece 3 to be tested, making the other side of the workpiece 3 to be tested also the windward side, thus avoiding the temperature difference caused by one side facing the wind and the other side facing the wind.

[0036] Optionally, the test box also includes an adjustment component, which is configured to adjust the air outlet direction and air outlet volume of the ventilation hole 41. The air outlet direction and air outlet volume of the ventilation hole 41 can be adjusted according to the type of workpiece 3 to be tested and the test requirements, thereby increasing the function of the test box and expanding the scope of application of the test box.

[0037] Specifically, the adjustment assembly includes a plurality of adjustment plates 42, which are rotatably arranged in the first air chamber 4 and correspond one-to-one with the ventilation holes 41. One end of the adjustment plate 42 is arranged on the inner wall of the first air chamber 4 away from the ventilation holes 41 through an angle adjustment member. The angle adjustment member can rotate the adjustment plate 42 around the fixed end and can be fixed after rotating to a suitable position. The angle adjustment member can be a gear angle adjustment mechanism. The gear angle adjustment mechanism is a prior art and will not be described in detail here. When wind flows into the air inlet of the first air chamber 4, the rotation angle of the adjustment plate 42 is different, so that the angle formed between the wind flow direction and the adjustment plate 42 is different, thereby adjusting the direction of the wind flowing out of the ventilation holes 41. The regulating plate 42 is provided with through holes, so that while part of the wind is regulated by the regulating plate 42 and flows out of the ventilation hole 41, the other part of the wind can continue to flow in the first air chamber 4 and flow out from the next ventilation hole 41. The smaller the angle between the regulating plate 42 and the horizontal direction, the more wind flows out of the through holes on the regulating plate 42. Therefore, in the same first air chamber 4, the angle between the regulating plate 42 and the horizontal plane gradually increases from bottom to top to ensure that the surface of the workpiece 3 to be tested on each load position is subjected to a uniform amount of wind. Of course, the setting of the regulating component is not limited to this. In other embodiments, a regulating valve is provided at the ventilation hole 41 to adjust the amount of air flowing out of the ventilation hole 41. The setting of the regulating component is not limited to this, as long as it can adjust the direction and amount of air flowing out of the ventilation hole 41.

[0038] In order to make the wind direction in the box 1 more regular and improve the uniformity of the temperature at the preset position, the test box also includes a second air chamber 5, the two ends of which are respectively connected to the two first air chambers 4. The wind flowing out of the ventilation holes 41 can flow into the second air chamber 5 after passing through the surface of the workpiece 3 to be tested, and then flow out from the ventilation holes 41 of the first air chamber 4.

[0039] Optionally, the drive assembly includes two fans 6, which are connected to the air inlet of the first air chamber 4. The fans 6 can provide power to drive the air flow in the box body 1 to flow into the second air chamber 5 after passing through the surface of the workpiece 3 to be tested, enter the first air chamber 4 through the air inlet of the first air chamber 4, and then flow out from the ventilation hole 41, forming a regular circulation. In order to achieve control of the wind speed in the box body 1, the test box also includes a controller, and the fans 6 are electrically connected to the controller. The controller is configured to be able to adjust the speed of the fans 6, thereby controlling the wind speed in the box body 1. Of course, the setting of the drive assembly and its control method are not limited to this, as long as it can achieve the purpose of driving the wind in the box body 1 to form a regular circulation and the wind speed can be controlled.

[0040] Furthermore, the fans 6 are symmetrically arranged on both sides of the bracket 2, so that the air volume flowing into the two first air chambers 4 can be the same, and the wind flowing out of the ventilation holes 41 is more uniform, which can improve the uniformity of the test box and reduce the temperature difference at the preset position in the box 1 caused by uneven air volume distribution.

[0041] In order to provide a constant temperature environment for the workpiece 3 to be tested, the test chamber also includes a temperature adjustment component 7, which is arranged in the box body 1. The temperature adjustment component 7 is configured to adjust the temperature of the wind blown to the surface of the workpiece 3 to be tested, so as to adjust the temperature of the surface of the workpiece 3 to be tested.

[0042] Optionally, the temperature regulating assembly 7 includes an evaporator and a heater. The evaporator is configured to reduce the temperature of the wind blowing onto the surface of the workpiece 3 to be tested, and the heater is configured to increase the temperature of the wind blowing onto the surface of the workpiece 3 to be tested. Specifically, the heater is a resistance wire that generates heat when energized to increase the temperature of the wind blowing onto the surface of the workpiece 3 to be tested. The evaporator includes a refrigerant and an evaporation tube. The refrigerant evaporates and absorbs heat within the evaporation tube to perform cooling and cooling. The evaporator is a prior art and will not be described in detail here. In order to achieve a constant temperature within the housing 1, a temperature sensor is further provided within the housing 1 to monitor the temperature. The temperature sensor, evaporator, and heater are electrically connected to a controller, respectively. The controller receives the temperature value transmitted by the temperature sensor and compares it with a preset temperature, thereby controlling the operation of the evaporator or heater. When the temperature of the surface of the workpiece 3 to be tested is higher than the preset temperature, the controller controls the evaporator to operate to reduce the temperature of the surface of the workpiece 3 to be tested. When the temperature sensor detects that the temperature of the surface of the workpiece 3 to be tested is lower than the preset temperature, the controller controls the heater to operate to increase the temperature of the surface of the workpiece 3 to be tested. Of course, the setting and control method of the temperature adjustment component 7 is not limited to this, as long as it can adjust the temperature of the surface of the workpiece 3 to be tested to provide a constant temperature test environment for the workpiece 3 to be tested.

[0043] Preferably, the temperature regulating component 7 can also be arranged in the second air chamber 5. The space of the second air chamber 5 is smaller, and the temperature of the wind flowing into the first air chamber 4 from the air inlet of the first air chamber 4 can be adjusted more quickly, thereby realizing the rapid adjustment of the temperature of the wind flowing out from the ventilation holes 41 on the first air chamber 4 and blowing to the surface of the workpiece 3 to be tested, so as to improve the testing efficiency of the workpiece 3 to be tested.

[0044] In order to enable the temperature inside the box 1 to reach the set temperature more quickly, there are multiple temperature adjustment components 7. Furthermore, the multiple temperature adjustment components 7 are symmetrically arranged along the central axis of the bracket 2, so that the temperature of the wind flowing out from the ventilation holes 41 of the two first air chambers 4 to the surface of the workpiece 3 to be tested can be consistent, thereby improving the uniformity and test accuracy of the test box.

[0045] Optionally, the test box also includes a nitrogen purge device and a strong exhaust fan, which are symmetrically arranged in the box body 1. The nitrogen purge device is configured to be able to transport nitrogen into the box body 1, and the strong exhaust fan is configured to be able to discharge the gas in the box body 1. Before using the test box, turn on the nitrogen purge device and the strong exhaust fan to discharge the residual waste gas in the box body 1 to avoid affecting the test of the workpiece 3 to be tested. When the workpiece 3 to be tested is an easily oxidized workpiece, it is necessary to isolate the air during the test. First, place the workpiece 3 to be tested in the carrying position in the box body 1, close the door of the test box, turn on the nitrogen purge device and the strong exhaust fan, and completely discharge the air in the box body 1 so that the box body 1 is filled with nitrogen to achieve the purpose of isolating the air.

[0046] Optionally, a camera is provided inside the box 1 and a screen is provided outside the box 1 . Both the camera and the screen are electrically connected to the controller to enable observation of the test process of the workpiece 3 to be tested inside the box 1 .

[0047] In the description herein, it should be understood that terms such as "upper," "lower," and "right" are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the structures referred to must have a specific orientation, be constructed, or operate in a specific manner. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and do not have any special meaning.

[0048] In this specification, reference to terms such as "one embodiment" or "example" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0049] Furthermore, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A test box, comprising a box body (1), characterized in that: Also includes: A bracket (2), the bracket (2) being arranged in the box (1), the bracket (2) being provided with a plurality of bearing positions arranged in a vertical direction, the bearing positions being arranged in the middle of the bracket (2), and each of the bearing positions being capable of bearing a workpiece (3) to be tested; Two first air chambers (4), the two first air chambers (4) are symmetrically arranged on both sides of the bracket (2), each of the first air chambers (4) is provided with a plurality of ventilation holes (41) arranged in a vertical direction and facing the bracket (2), the ventilation holes (41) of the two first air chambers (4) are arranged one by one opposite to each other, and each of the bearing positions is located between two opposite ventilation holes (41); A driving assembly configured to drive the air in the box (1) to flow from the air inlet of the first air chamber (4) into the first air chamber (4), then out through the ventilation hole (41), and blow toward the surface of the workpiece to be tested (3) on the corresponding side; It also includes an adjustment component, wherein the adjustment component is configured to be able to adjust the air outlet direction and air outlet volume of the ventilation hole (41); The adjustment assembly comprises a plurality of adjustment plates (42), wherein the adjustment plates (42) are rotatably disposed in the first air chamber (4) and correspond one-to-one to the ventilation holes (41); The regulating plate (42) is provided with through holes so that part of the wind can be regulated by the regulating plate (42) and flow out of the ventilation hole (41), while another part of the wind can continue to flow in the first air chamber (4) and flow out from the next ventilation hole (41). In the same first air chamber (4), the angle between the regulating plate (42) and the horizontal plane gradually increases from bottom to top.

2. The test box according to claim 1, characterized in that Each of the carrying positions is capable of carrying a plurality of the workpieces (3) to be tested.

3. The test box according to claim 2, characterized in that When testing the workpiece (3) to be tested, the workpiece (3) to be tested is placed on the supporting position. During the test, wind flows into the first air chamber (4) from the air inlet of each first air chamber (4) and then flows out from the two ventilation holes (41) facing the two sides of each supporting position. Both sides of the workpiece (3) to be tested are windward surfaces.

4. The test box according to claim 1, characterized in that The invention also includes a second air chamber (5), wherein both ends of the second air chamber (5) are respectively connected to the two first air chambers (4), and the wind flowing out of the ventilation holes (41) can flow into the second air chamber (5) after passing through the surface of the workpiece to be tested (3), and then flow out from the ventilation holes (41) of the first air chamber (4).

5. The test box according to claim 1, characterized in that The driving assembly comprises two fans (6), and the fans (6) are connected to the air inlet.

6. The test box according to claim 5, characterized in that The fans (6) are symmetrically arranged on both sides of the bracket (2).

7. The test box according to claim 1, characterized in that It also includes a temperature adjustment component (7), which is configured to adjust the temperature of the wind blown to the surface of the workpiece (3) to be tested.

8. The test box according to claim 7, characterized in that The temperature adjustment component (7) includes an evaporator and a heater, wherein the evaporator is configured to reduce the temperature of the wind blowing onto the surface of the workpiece (3) to be tested, and the heater is configured to increase the temperature of the wind blowing onto the surface of the workpiece (3) to be tested.

9. The test box according to claim 7, characterized in that: The number of the temperature regulating components (7) is multiple.

10. The test box according to claim 9, characterized in that: The temperature regulating assembly (7) is arranged in the second air chamber (5), and a plurality of the temperature regulating assemblies (7) are symmetrically arranged along the central axis of the bracket (2).

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