High and low temperature performance detection device of lamp PCB (printed circuit board) element

Abstract

A high and low temperature performance detection device for lamp PCB components comprises a detection cabinet and a control center, the detection cabinet comprises a cabinet body and a cabinet door, a detection space is arranged in the cabinet body, a hot air device, humidifying devices and a carrying device are installed in the detection space, the two sides of the carrying device are each provided with a set of humidifying device, and the control center is connected with the control center. A plurality of air outlet holes are formed between the adjacent clamping grooves in the bearing plate, and the humidifying device is installed on the rear side of the bearing plate and communicated with the air outlet holes. During detection, water vapor uniformly enters the space between the carrying plates through the air outlet holes, so that the humidity in the detection space is quickly and uniformly distributed, and a local high-humidity region and a humidity lag phenomenon are avoided. Meanwhile, a plurality of vertically extending partition plates are arranged on the back face of the bearing plate to form a plurality of interval intervals, and a humidifying device is correspondingly installed in each interval interval, so that it is ensured that each air outlet can evenly output water vapor, the humidifying uniformity is further improved, the humidity difference caused by the different number of interval layers of the carrying plates is avoided, and the detection accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the technical field, specifically to a high and low temperature performance testing device for lighting fixture PCB board components. Background Technology

[0002] High and low temperature performance testing is a crucial step in verifying the reliability of PCB design. It simulates extreme climatic conditions such as high and low temperatures, and alternating periods of high and low humidity to verify the reliability of products under complex operating conditions. However, existing testing products typically employ a single-sided air intake or top return air structure, resulting in a single airflow path. In multi-layered testing, this structure creates localized high-humidity zones near the humidification nozzle due to direct impact from humid air, while areas further away from the airflow experience humidity lag due to airflow attenuation. For details, refer to Chinese invention patent application CN119456062A, entitled "A Multifunctional Constant Temperature and Humidity Test Chamber." This localized humidity unevenness can lead to misjudgments of component damp-heat stress, causing deviations in the testing structure. Specifically, localized humidity overshoot may trigger non-design failure modes (such as false corrosion), while insufficient humidity may miss actual weak points. Furthermore, to ensure humidity compliance in all areas, the steady-state holding time needs to be excessively extended, significantly reducing testing efficiency. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a high and low temperature performance testing device for lighting PCB board components.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A high and low temperature performance testing device for lighting fixture PCB board components includes a testing cabinet and a control center. The control center is connected to the testing cabinet and controls its operation. The testing cabinet includes a cabinet body and a door. The cabinet body has a testing space. The testing cabinet also includes a hot air device, a humidification device, and a carrying device installed in the testing space. The carrying device is fixed in the testing space. Two sets of hot air devices are provided and installed at the upper and lower parts of the testing space, respectively. Two sets of humidification devices are provided and located on both sides of the carrying device. The carrying device includes a support. The system comprises a frame, a support plate, and a carrying plate. The support frame is fixed to the two side walls of the testing space to form a support. The support plate consists of two sets, each set located on one side inside the support frame. Each set of support plates has multiple slots extending in the front-back direction on opposite sides. These slots are evenly spaced vertically. The carrying plate consists of multiple plates, with both ends inserted into the slots to form a support. On the support plate, multiple air vents are arranged in the front-back direction between adjacent slots. The humidifying device is installed on the rear side of the support plate and connects to the air vents.

[0006] Furthermore, the width of the card slot is adapted to the thickness of the carrier plate, and a guide surface is provided at the front end of the card slot, which makes the front end of the card slot form an outward opening in the shape of an octagon.

[0007] Furthermore, the back of the support plate is provided with multiple partitions extending vertically, and the multiple partitions are spaced apart to form multiple intervals. Each interval has vertically arranged air outlets. Multiple humidifying devices are provided and installed in the intervals. The humidifying devices located in the intervals output water vapor evenly to each air outlet.

[0008] In this invention, the hot air device includes a heating box and a blower. The blower is installed on the upper part of the heating box. After the heating box heats the air, the blower blows the hot air into the detection space.

[0009] Furthermore, the heating box includes a box body and multiple heating rods. The middle part of the box body is provided with a heating cavity that runs vertically through it, and the multiple heating rods are horizontally installed inside the heating cavity.

[0010] Furthermore, the blower includes a mounting bracket and multiple fans, the mounting bracket being fixed to the opening at the top of the heating chamber, and the multiple fans being arranged and mounted on the mounting bracket.

[0011] Furthermore, the carrier plate is provided with a plurality of evenly arranged ventilation holes.

[0012] This utility model has the following advantages and beneficial effects:

[0013] A humidification device is installed on each side of the loading device, and multiple air outlets are set between adjacent slots on the support plate. The humidification devices are installed on the rear side of the support plate and connected to the air outlets. During testing, water vapor enters evenly between each layer of the loading plate through the air outlets, ensuring rapid and uniform humidity distribution within the testing space and avoiding localized high-humidity areas and humidity lag. Simultaneously, multiple vertically extending partitions are installed on the back of the support plate, forming multiple intervals. A humidification device is installed in each interval to ensure that each air outlet outputs water vapor evenly, further improving humidification uniformity and avoiding humidity differences caused by varying the number of loading plate layers, thus enhancing testing accuracy.

[0014] In addition, regarding the hot air supply, a set of hot air devices is installed at the upper and lower parts of the testing space. The heating box of the hot air device heats the air and then blows the hot air into the testing space through the blower. Furthermore, the carrier plate is provided with multiple evenly arranged ventilation holes, which allows the hot air to be evenly distributed through each layer of carrier plate, effectively improving the temperature uniformity within the testing space. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the detection device in this embodiment;

[0017] Figure 2 This is a front view of the cabinet in this embodiment;

[0018] Figure 3 This is a schematic diagram of the structure of the loading device in this embodiment;

[0019] Figure 4 This is a schematic diagram of the support plate in this embodiment;

[0020] Figure 5 This is a schematic diagram of the hot air device in this embodiment. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. However, this utility model is not limited to the following embodiments.

[0022] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0023] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0024] like Figures 1 to 5As shown in the figure, this embodiment discloses a high and low temperature performance testing device for lighting fixture PCB board components, including a testing cabinet 1 and a control center 2. The control center 2 is connected to the testing cabinet 1 and controls its operation. The testing cabinet 1 includes a cabinet body 11 and a cabinet door 12. The cabinet body 11 has a testing space 110. The cabinet door 12 is installed at the opening of the testing space 110. During the testing process, the cabinet door 12 closes the testing space 110. The testing cabinet 1 also includes a hot air device 13, a humidifying device 14, and a carrying device 15 installed in the testing space 110. The loading device 15 is fixed within the detection space 110. Two sets of hot air devices 13 are installed at the upper and lower parts of the detection space 110, respectively. Two sets of humidifying devices 14 are installed on both sides of the loading device 15. Specifically, the loading device 15 includes a support frame 151, a support plate 152, and a loading plate 153. The support frame 151 is fixed to the two side walls of the detection space 110 to form a support. Two sets of support plates 152 are installed on both sides inside the support frame 151. The support plate 152 has multiple slots 1521 extending in the front-to-back direction on one side. These slots 1521 are evenly spaced vertically. Multiple carrier plates 153 are provided, with their ends inserted into the slots 1521 to form a support. This allows PCBs of different specifications to be mounted on the carrier plates 153 for testing. Preferably, multiple air vents 1522 arranged in the front-to-back direction are provided between adjacent slots 1521 on the support plate 152. The humidifying device 14 is installed on the support plate 152. The rear side of 52 is connected to the air outlet 1522. During testing, the water vapor generated by the humidification device 14 enters between each layer of the carrier plate 153 in the testing space 110 through the air outlet 1522. The air outlets 1522 on both sides can quickly humidify between each layer of the carrier plate 153, keeping the humidity in the testing space 110 uniform. In addition, the larger the interval between each layer of the carrier plate 153, the more air outlets 1522 can deliver water vapor. Therefore, the height of the interval between the carrier plates 153 will not affect the humidification efficiency or the humidity of each area.

[0025] Furthermore, the width of the slot 1521 is adapted to the thickness of the carrier plate 153. In addition, in order to facilitate the sliding of the carrier plate 153 into the slot 1521, a guide surface 1523 is provided at the front port of the slot 1521. Specifically, the end of the slot 1521 is chamfered to form an external opening in the shape of an octagon.

[0026] Furthermore, to make the humidification effect more uniform, multiple vertically extending partitions 1524 are provided on the back of the support plate 152. The multiple partitions 1524 are spaced apart to form multiple intervals 1525. Each interval 1525 has vertically arranged air outlets 1522. Multiple humidification devices 14 are provided and correspondingly installed in the intervals 1525. During operation, the humidification devices 14 located in the intervals 1525 uniformly output water vapor to each air outlet 1522, avoiding uneven humidity in each layer due to the different number of intervals of the carrier plate 153. This can improve the detection accuracy. Preferably, the humidification device 14 adopts a common humidifier on the market. The humidification device 14 has a long strip structure and the output port is aligned.

[0027] In this embodiment, the hot air device 13 includes a heating box 131 and a blower 132. The blower 132 is installed on the upper part of the heating box 131. The heating box 131 heats the air and then blows the hot air into the detection space 110 through the blower 132. The heating box 131 includes a box body 1311 and multiple heating rods 1312. A vertically penetrating heating cavity 1310 is provided in the middle of the box body 1311, and the multiple heating rods are horizontally installed in the heating cavity 1310. The blower 132 includes a mounting frame 1321 and a plurality of fans 1322. The mounting frame 1321 is fixed to the opening at the upper part of the heating chamber 1310. The plurality of fans 1322 are arranged and mounted on the mounting frame 1321. Preferably, in order to allow hot air to pass through each layer of the carrier plate 153, a plurality of evenly arranged ventilation holes 1530 are provided on the carrier plate 153. The hot air blown from top to bottom or from bottom to top can pass through the carrier plate 153 and be evenly distributed in the detection space 110.

[0028] The above description in this specification is merely an illustrative example of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the specific embodiments described or adopt similar methods to replace them, as long as they do not deviate from the content of this specification or exceed the scope defined in the claims, they shall all fall within the protection scope of this invention.

Claims

1. A high and low temperature performance testing device for lighting fixture PCB board components, comprising a testing cabinet (1) and a control center (2), wherein the control center (2) is connected to the testing cabinet (1) and controls its operation, the testing cabinet (1) comprising a cabinet body (11) and a cabinet door (12), wherein the cabinet body (11) is provided with a testing space (110), characterized in that: The testing cabinet (1) also includes a hot air device (13), a humidifying device (14), and a carrying device (15) installed in the testing space (110). The carrying device (15) is fixed in the testing space (110). The hot air device (13) is provided in two sets and is installed in the upper and lower parts of the testing space (110) respectively. The humidifying device (14) is provided in two sets and is installed on both sides of the carrying device (15). The carrying device (15) includes a support frame (151), a support plate (152), and a carrying plate (153). The support frame (151) is fixed to the two side walls of the testing space (110) to form a support. The support plate (152) is provided in two sets and is respectively set on both sides inside the support frame (151). On the opposite side of the two sets of support plates (152), there are multiple slots (1521) extending in the front-back direction. The multiple slots (1521) are evenly spaced in the vertical direction. There are multiple load plates (153). The two ends of the multiple load plates (153) are inserted into the slots (1521) to form support. On the support plate (152), there are multiple air outlets (1522) arranged in the front-back direction between two adjacent slots (1521). The humidification device (14) is installed on the rear side of the support plate (152) and connected to the air outlets (1522).

2. The high and low temperature performance testing device for lighting PCB board components according to claim 1, characterized in that: The width of the slot (1521) is adapted to the thickness of the carrier plate (153). A guide surface (1523) is provided at the front end of the slot (1521), and the guide surface (1523) makes the front end of the slot (1521) form an outward opening in the shape of an eight.

3. The high and low temperature performance testing device for lighting PCB board components according to claim 2, characterized in that: The back of the support plate (152) is provided with a plurality of partitions (1524) extending vertically. The plurality of partitions (1524) are spaced apart to form a plurality of intervals (1525). Each interval (1525) has vertically arranged air outlets (1522). The humidifying device (14) is provided with a plurality of devices and is installed in the intervals (1525). The humidifying device (14) located in the intervals (1525) outputs water vapor evenly to each air outlet (1522).

4. The high and low temperature performance testing device for lighting PCB board components according to claim 1, characterized in that: The hot air device (13) includes a heating box (131) and a blower (132). The blower (132) is installed on the upper part of the heating box (131). The heating box (131) heats the air and then blows the hot air into the detection space (110) through the blower (132).

5. The high and low temperature performance testing device for lighting PCB board components according to claim 4, characterized in that: The heating box (131) includes a box body (1311) and multiple heating rods (1312). The middle part of the box body (1311) is provided with a heating cavity (1310) that runs vertically through it. The multiple heating rods are horizontally installed in the heating cavity (1310).

6. The high and low temperature performance testing device for lighting PCB board components according to claim 5, characterized in that: The blower (132) includes a mounting bracket (1321) and a plurality of fans (1322). The mounting bracket (1321) is fixed at the opening at the upper part of the heating chamber (1310), and the plurality of fans (1322) are arranged and mounted on the mounting bracket (1321).

7. The high and low temperature performance testing device for lighting PCB board components according to claim 6, characterized in that: The carrier plate (153) is provided with a plurality of evenly arranged ventilation holes (1530).

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