Test box

Abstract

The invention relates to the technical field of test equipment, and discloses a test box which comprises a box body, a support, two first air chambers, a driving assembly and an adjusting assembly, the support is arranged in the box body, a plurality of bearing positions distributed in the vertical direction are arranged on the support, and each bearing position can bear a workpiece to be tested; the two first air chambers are symmetrically arranged on the two sides of the support, each first air chamber is provided with a plurality of ventilation holes which are distributed in the vertical direction and face the support, the ventilation holes of the two first air chambers are formed in a one-to-one opposite mode, and each bearing position is located between the two corresponding ventilation holes; the driving assembly is configured to be capable of driving air 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 hole and blow to the surface of the to-be-tested workpiece on the corresponding side. The two opposite surfaces of the to-be-tested workpiece in the test box are windward sides, so that the test precision of the to-be-tested workpiece can be improved, and the temperature of 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 filing date of the original application is October 19, 2020, and the name of the invention is a test chamber). Technical Field

[0002] The invention relates to the technical field of test equipment, and 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 performance indicators of workpieces such as electronic equipment at different temperatures.

[0004] Existing test chambers usually adopt the air circulation method to control the temperature of various places in the chamber by circulating the air in the chamber. However, most of the existing temperature test chambers have a single wind direction circulation, so that one end of the workpiece to be tested is the windward side and the other end is the leeward side. The different placement positions and placement angles of the workpiece to be tested in the test chamber will affect the measured temperature value, and the test results will have a large deviation. Summary of the invention

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

[0008] A bracket, the bracket is arranged in the box, and the bracket is provided with a plurality of bearing positions arranged in a vertical direction, and each of the bearing positions can bear 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 opposite to each other, and each of the bearing positions is located between two opposite ventilation holes;

[0010] A driving assembly, wherein the driving assembly is configured to drive the wind in the box to flow into the first wind chamber from the air inlet of the first wind chamber, then flow out through the ventilation hole, 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 is 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 with the ventilation holes;

[0013] The adjusting plate is provided with through holes so that part of the wind can flow out of the ventilation hole after being adjusted by the adjusting plate, while another 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 adjusting 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 bearing position. During the test, wind flows into the first wind chamber from the air inlet of each of the first wind chambers, and then flows out from the two ventilation holes opposite to each of the bearing positions. Both sides of the workpiece to be tested are windward surfaces.

[0016] Preferably, it further includes a second air chamber, both ends of which are respectively connected to the two first air chambers, so that 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 comprises 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 being configured to reduce the temperature of wind blowing onto the surface of the workpiece to be tested, and the heater being configured to increase the temperature of 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 driving component. 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 a workpiece to be tested, and a plurality of 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, and the ventilation holes of the two first air chambers are arranged one by one directly opposite to each other, and each bearing position is located between two opposite ventilation holes, which can ensure that the workpieces to be tested on the plurality of bearing positions are The consistency of the test conditions; the driving component is configured to drive the wind in the box body to flow into the first wind chamber from the air inlet of the first wind chamber, 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, the test box has high uniformity, and can avoid temperature test deviation caused by different placement positions and angles of the workpiece to be tested, thereby improving the test accuracy of the workpiece to be tested.

[0025] The test box also includes an adjustment component, which is configured to adjust the air outlet direction and air volume of the vents. The air outlet direction and air volume of the vents can be adjusted according to the type of the workpiece 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. Specifically, the adjustment component includes a plurality of adjustment plates, which are rotatably arranged in the first air chamber and correspond to the vents one by one. When the wind flows in from the air inlet of the first air chamber, the rotation angle of the adjustment plate is different, so that the flow direction of the wind and the angle formed between the adjustment plate are different, thereby adjusting the direction of the wind flowing out of the vents. Through holes are provided on the adjustment plate, so that while part of the wind is adjusted by the adjustment plate to flow out of the vents, the other part of the wind can continue to flow in the first air chamber and flow out from the next vent, and the smaller the angle between the adjustment plate and the horizontal direction, the more wind flows out of the through holes on the adjustment plate. Therefore, in the same first air chamber, the angle between the adjustment plate and the horizontal plane gradually increases from bottom to top to ensure that the surface of the workpiece to be tested on each layer of the bearing position is subjected to uniform air volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 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 circulation process of air in a box provided by an embodiment of the present invention.

[0028] In the figure:

[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 regulating component. DETAILED DESCRIPTION

[0032] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are 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 driving assembly. The bracket 2 is arranged in the box body 1, and a plurality of bearing positions arranged in the vertical direction are provided on the bracket 2, each bearing position can bear a workpiece 3 to be tested, and testing a plurality of 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, and the ventilation holes 41 of the two first air chambers 4 are arranged one by one directly opposite to each other, and each bearing position is located between two opposite ventilation holes 41; the driving assembly is configured to be able 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, and then flow out through the ventilation holes 41, and blow to 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 set on the load-bearing position. During the test, the wind flows into the first wind chamber 4 from the air inlet of each first wind chamber 4, and then flows out from the two vents 41 facing each load-bearing position, so that both sides of the workpiece 3 to be tested are windward, avoiding the temperature difference caused by one side facing the wind and the other side leeward. The setting of multiple ventilation holes 41 makes the temperature at each load-bearing position in the test box consistent, and the test box has high uniformity and precision, which can avoid the test error caused by the placement position and placement angle of the workpiece 3 to be tested, and improve the test accuracy of the workpiece 3 to be tested. According to the test verification conducted in accordance with the standard GB / T 5170.2-2017, the test box can meet the performance requirements of nine-point uniformity ≤2 degrees in the box body 1 when unloaded and nine-point uniformity ≤2 degrees in the box body 1 when loaded. The standard GB / T 5170.2-2017 is the national standard for the inspection method of environmental test equipment, and no redundant description is made here. In this embodiment, the workpiece 3 to be tested is a self-heating battery, and its power is 10W. The test box can meet the temperature uniformity of ≤2 degrees within 10mm of the center point of the surface of the self-heating battery.

[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 exposed to 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 exposed to 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, and the other side of the workpiece 3 to be tested is opposite to the ventilation holes 41 of the other first air chamber 4. The wind flowing out of the closer ventilation holes 41 directly blows onto the corresponding surface of the workpiece 3 to be tested, and the other side of the workpiece 3 to be tested can be partially exposed to the wind flowing out of the farther ventilation holes 41; in addition, when other bearing positions and ventilation holes 41 are provided above the bearing position, part 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, so that the other side of the workpiece 3 to be tested is also the windward side, thereby avoiding the temperature difference caused by one side facing the wind and the other side being leeward.

[0036] Optionally, the test box also includes an adjustment component, which is configured to adjust the air outlet direction and air volume of the ventilation holes 41. The air outlet direction and air volume of the ventilation holes 41 can be adjusted according to the type of the 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 component 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. Among them, 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, and the angle adjustment member can make the adjustment plate 42 rotate around the fixed end, and can be fixed after rotating to a suitable position, and the angle adjustment member can be a gear angle adjustment mechanism, which is a prior art and will not be described in detail here. When wind flows in from the air inlet of the first air chamber 4, the rotation angle of the adjustment plate 42 is different, so that the flow direction of the wind and the angle formed between the adjustment plate 42 are 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 part of the wind can be adjusted by the regulating plate 42 and flow out from the ventilation hole 41, while 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 from 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 layer of the 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 wind flowing out of the ventilation hole 41. The setting of the regulating component is not limited to this, as long as the wind direction and wind volume of the wind flowing out of the ventilation hole 41 can be adjusted.

[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 wind chamber 5, the two ends of which are respectively connected to the two first wind chambers 4. The wind flowing out of the ventilation holes 41 can flow into the second wind 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 wind 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 wind flow in the box 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 to form a regular cycle. In order to achieve the control of the wind speed in the box 1, the test box also includes a controller, and the fan 6 is electrically connected to the controller. The controller is configured to be able to adjust the rotation speed of the fan 6, thereby controlling the wind speed in the box 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 drive of the wind in the box 1 to form a regular cycle 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 box 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 adjustment component 7 includes an evaporator and a heater. The evaporator is configured to reduce the temperature of the wind blowing to the surface of the workpiece 3 to be tested, and the heater is configured to increase the temperature of the wind blowing to the surface of the workpiece 3 to be tested. Specifically, the heater is a resistance wire, which is energized to generate heat to increase the temperature of the wind blowing to the surface of the workpiece 3 to be tested; the evaporator includes a refrigerant and an evaporation tube, and the refrigerant evaporates and absorbs heat in the evaporation tube to perform cooling and cooling. The evaporator is a prior art and is not described in detail here. In order to achieve a constant temperature in the box 1, a temperature sensor is also provided in the box 1 to monitor the temperature. The temperature sensor, the evaporator and the heater are electrically connected to the controller respectively. The controller receives the temperature value transmitted by the temperature sensor and compares it with the preset temperature, thereby controlling the evaporator or the heater to work. 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 work to reduce the temperature of the surface of the workpiece 3 to be tested; when the temperature sensor monitors 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 work 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 adjustment component 7 can also be arranged in the second wind chamber 5. The space of the second wind chamber 5 is smaller, and the temperature of the wind flowing into the first wind chamber 4 from the air inlet of the first wind chamber 4 can be adjusted more quickly, thereby achieving rapid adjustment of the temperature of the wind flowing out from the ventilation holes 41 on the first wind chamber 4 and blowing onto 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 make the temperature in the box 1 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 wind 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 deliver nitrogen into the box body 1, and the strong exhaust fan is configured to exhaust the gas in the box body 1. Before using the test box, turn on the nitrogen purge device and the strong exhaust fan to exhaust 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, put the workpiece 3 to be tested into the load 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 exhaust 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 observe the testing process of the workpiece 3 to be tested inside the box 1 .

[0047] In the description herein, it should be understood that the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the structure referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0049] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and 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 body (1), the bracket (2) being provided with a plurality of bearing positions arranged in a vertical direction, 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, the driving assembly being configured to drive the wind in the box (1) to flow into the first wind chamber (4) from the air inlet of the first wind chamber (4), then flow out through the ventilation hole (41), and blow toward the surface of the workpiece (3) to be tested 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 from 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 bearing position. During the test, wind flows into the first wind chamber (4) from the air inlet of each of the first wind chambers (4), and then flows out from the two ventilation holes (41) opposite to the two sides of each of the bearing positions. Both sides of the workpiece (3) to be tested are windward surfaces.

4. The test box according to claim 1, characterized in that: It also comprises a second air chamber (5), the two ends of which are respectively connected to the two first air chambers (4), and the wind flowing out from 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).

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 comprises a temperature adjustment component (7), wherein the temperature adjustment component (7) is configured to adjust the temperature of the wind blowing onto 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) comprises an evaporator and a heater, wherein the evaporator is configured to reduce the temperature of wind blowing onto the surface of the workpiece (3) to be tested, and the heater is configured to increase the temperature of wind blowing onto the surface of the workpiece (3) to be tested.

9. The test box according to claim 7, characterized in that: The temperature adjustment components (7) are multiple in number.

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

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