EMC electromagnetic compatibility test device
By introducing a cooling fan and a controllable baffle structure into the EMC electromagnetic compatibility test apparatus, the problem of heat accumulation inside the sealed chamber was solved, rapid cooling was achieved, and the reliability and safety of the test were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-04-07
AI Technical Summary
Existing EMC electromagnetic compatibility testing equipment, during long-term operation, can cause the temperature of the tested equipment to become too high due to the heat accumulation in the closed testing environment, which is difficult to dissipate effectively. This may result in thermal damage, reduced accuracy of test results, or even damage to the equipment.
An EMC electromagnetic compatibility testing device was designed, comprising a sealed chamber, a detector, a cooling fan, a filter, a guide rod, a baffle, and a cylinder. The opening and closing of the baffle is controlled by the cylinder, and combined with the powerful cooling fan, the internal temperature of the sealed chamber is rapidly and effectively reduced.
It achieves rapid and effective reduction of the internal temperature of the sealed chamber, improves testing efficiency and equipment safety, and avoids thermal damage to the tested equipment and device damage.
Smart Images
Figure CN224095931U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical engineering, and in particular to an EMC electromagnetic compatibility testing device. Background Technology
[0002] EMC (Electromagnetic Compatibility) test suites are a series of test equipment and facilities used to evaluate and verify the ability of electronic devices or systems to operate normally in specific electromagnetic environments. These suites are primarily used to ensure that equipment not only operates stably in its intended operating environment but also does not generate unacceptable electromagnetic interference to other equipment.
[0003] Existing EMC (electromagnetic compatibility) testing equipment tends to generate a lot of heat during long-term operation due to continuous operation of the testing equipment and the influence of electromagnetic interference. This heat accumulates in the closed testing environment and is difficult to dissipate effectively, resulting in excessively high temperatures of the equipment under test. Excessive temperatures may cause thermal damage to the equipment under test, affecting its normal function or even causing permanent damage. This not only reduces the accuracy of test results but may also lead to damage to expensive testing equipment, increasing maintenance and replacement costs.
[0004] To address the above issues, it is necessary to design an EMC electromagnetic compatibility testing device that can dissipate heat from the sealed enclosure. Utility Model Content
[0005] To overcome the drawbacks of heat accumulating in a closed testing environment, making it difficult to dissipate effectively and causing the temperature of the device under test to be too high, which may cause thermal damage to the device under test, this utility model provides an EMC electromagnetic compatibility testing device.
[0006] The technical implementation scheme of this utility model is as follows: an EMC electromagnetic compatibility testing device includes a sealed box, a detector, a box door, a mounting frame, a cooling fan, a filter screen, guide rods, a baffle, and a cylinder. The detector is installed on the upper side inside the sealed box. The box door is slidably connected to the front side of the sealed box. The mounting frames are symmetrically connected to the left and right sides of the outer side of the sealed box. Cooling fans are installed inside both mounting frames. Filter screens are provided on both mounting frames. The cylinder is installed on the rear side of the sealed box. A baffle is connected to the telescopic end of the cylinder. Guide rods are symmetrically connected to the left and right sides of the outer side of the sealed box. The baffle is slidably connected to the two guide rods.
[0007] More preferably, it also includes guide rods, guide seats, placement plates, fixing blocks, screws, and a motor. Multiple fixing blocks are evenly spaced on the lower side of the sealed box. A guide rod is connected between two fixing blocks on the left side, and a guide rod is also connected between two fixing blocks on the right side. A screw is threaded between two fixing blocks in the middle. A motor is installed on the rear side of the sealed box. The motor output shaft passes through the sealed box and is fixedly connected to the screw. A placement plate is slidably connected to the screw. The placement plate is slidably connected to two guide rods. Guide seats are symmetrically connected on the left and right sides inside the sealed box. The placement plate is slidably engaged with the two guide seats.
[0008] More preferably, it also includes a protective shell, with the protective shell located on the rear side of the sealed box.
[0009] More preferably, a handle is provided on the left side of the front of the door.
[0010] More preferably, the size of the placement plate is designed to fit snugly inside the two guide seats.
[0011] Even more preferably, a glass window is inlaid in the middle of the box door.
[0012] The beneficial effects of this utility model are as follows: by setting up a mounting frame, a cooling fan, a filter screen, a guide rod, a baffle, and a cylinder, the cylinder's extension end controls the opening and closing of the baffle. Combined with two powerful cooling fans, it can quickly and effectively reduce the internal temperature of the sealed chamber, thereby improving testing efficiency and equipment safety. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0014] Figure 2 This is a three-dimensional structural diagram of the sealed box and box door of this utility model.
[0015] Figure 3 This is a three-dimensional structural diagram of the sealed box and detector of this utility model.
[0016] Figure 4 This is a three-dimensional structural diagram of the mounting frame, guide rod, and stop frame of this utility model.
[0017] Figure 5 This is a three-dimensional structural diagram of the sealed box, mounting frame, and filter screen of this utility model.
[0018] Figure 6 This is a three-dimensional structural diagram of the sealed box, mounting frame, and cooling fan of this utility model.
[0019] Figure 7 This is a three-dimensional structural diagram of the guide rod, guide seat, and placement plate of this utility model.
[0020] Figure 8This is a cross-sectional view of the protective shell of this utility model.
[0021] The components in the attached diagram are labeled as follows: 1-Sealed box, 2-Detector, 3-Box door, 4-Mounting frame, 5-Cooling fan, 6-Filter screen, 7-Guide rod, 8-Baffle, 9-Cylinder, 10-Guide rod, 11-Guide seat, 12-Placement plate, 13-Fixing block, 14-Screw, 15-Motor, 151-Protective shell. Detailed Implementation
[0022] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.
[0023] Example: An EMC electromagnetic compatibility testing device, such as Figures 1-8As shown, the enclosure includes a sealed box 1, a detector 2, a door 3, a mounting frame 4, a cooling fan 5, a filter screen 6, a guide rod 7, a baffle 8, a cylinder 9, a guide rod 10, a guide seat 11, a placement plate 12, a fixing block 13, a screw 14, a motor 15, and a protective shell 151. The detector 2 is installed on the upper side inside the sealed box 1. The door 3 is slidably connected to the front of the sealed box 1, with a glass window embedded in the center of the door 3. A handle is provided on the left front side of the door 3. The mounting frames 4 are symmetrically connected to the left and right sides of the outer side of the sealed box 1. 4 is used to fix the cooling fan 5 and the filter screen 6. A cooling fan 5 is installed inside each of the two mounting frames 4. The cooling fan 5 draws in hot air from inside the sealed box 1 by rotating and discharges it through the exhaust port, reducing the internal temperature of the sealed box 1. A filter screen 6 is installed on each of the two mounting frames 4. A cylinder 9 is installed on the rear side of the sealed box 1. A baffle 8 is connected to the telescopic end of the cylinder 9. The baffle 8 is used to block or open the mounting frame 4. Guide rods 7 are symmetrically connected to the left and right sides of the outer side of the sealed box 1. The baffle 8 is slidably connected to the two guide rods 7. The guide rod 7 is used to guide the movement of the baffle 8, ensuring its smooth movement. Multiple fixing blocks 13 are evenly spaced along the lower side of the sealed box 1. These fixing blocks 13 are used to fix the guide rod 10 and the screw 14, providing structural support. A guide rod 10 is connected between two fixing blocks 13 on the left side, and also between two fixing blocks 13 on the right side. A screw 14 is threaded between the two fixing blocks 13 in the middle. A motor 15 is installed on the rear side of the sealed box 1, and the output shaft of the motor 15 passes through the sealed box 1 and... The screw 14 is fixedly connected. A protective shell 151 is provided on the rear side of the sealed box 1. The protective shell 151 is located outside the motor 15 and is used to protect the motor 15. A placement plate 12 is slidably connected to the screw 14. The placement plate 12 is slidably connected to two guide rods 10. The placement plate 12 is used to support the device under test. Guide seats 11 are symmetrically connected on the left and right sides inside the sealed box 1. The placement plate 12 is slidably engaged with the two guide seats 11. The size design of the placement plate 12 fits the inside of the two guide seats 11.
[0024] When using this device to perform EMC electromagnetic compatibility testing on the device under test (DUT), firstly, the operator fully opens the enclosure door 3 by pulling the handle, then places the DUT on the placement plate 12 and starts the DUT, ensuring it is in working order. After placing the DUT, the operator fully closes the enclosure door 3 by pulling the handle and then releases the handle. Next, the electromagnetic interference generator built into the sealed enclosure 1 is activated to generate electromagnetic interference signals of specific intensity and frequency, ensuring these signals cover the operating frequency band of the DUT. Simultaneously, the detector 2 is activated, which monitors the DUT in real time under electromagnetic interference. Under the specified interference conditions, if the device under test can continue to operate normally, it can be determined that it has qualified anti-interference capability. After the test is completed, turn off the electromagnetic interference generator to stop generating interference signals. After confirming that the interference signal has completely disappeared, turn off the detector 2 to end the test process. Pull the handle again to fully open the door 3 and close the device under test. Then start the motor 15. The output shaft of the motor 15 drives the screw 14 to rotate. The screw 14 drives the placement plate 12 and the device under test to move outward along the two guide rods 10. At the same time, the placement plate 12 moves outward along the two guide seats 11 until the placement plate 12 moves to a suitable position. Once the device under test (DUT) is in its initial position, motor 15 is turned off, and the DUT is removed. After removal, motor 15 is restarted in reverse. The output shaft of motor 15 drives screw 14 to rotate in the opposite direction. Screw 14 drives placement plate 12 to move inward along the two guide rods 10. Simultaneously, placement plate 12 moves inward along the two guide seats 11 until placement plate 12 reaches its initial position. Then, motor 15 is turned off, and the handle is pulled again to completely close the door 3. During prolonged testing, due to the continuous operation of the DUT and the influence of electromagnetic interference, a large amount of heat is easily generated inside the sealed chamber 1. Therefore, it is necessary to dissipate heat inside the sealed chamber 1. The operator starts cylinder 9, and the telescopic end of cylinder 9 moves the baffle 8 upward along the two guide rods 7 until the baffle 8 moves to the appropriate position. Then, cylinder 9 is closed to ensure that the two mounting frames 4 are no longer obstructed. Subsequently, the two cooling fans 5 are started. The two cooling fans 5 rotate to draw in the hot air inside the sealed box 1 and discharge it through the exhaust port to reduce the temperature inside the sealed box 1. When the temperature inside the sealed box 1 drops to the set appropriate temperature, the two cooling fans 5 are closed. Cylinder 9 is started again, and the telescopic end of cylinder 9 moves the baffle downward along the two guide rods 7 until the baffle moves to the initial position. Then, cylinder 9 is closed.
[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An EMC electromagnetic compatibility testing device, characterized in that it includes: The enclosure includes a sealed box (1), a detector (2), a door (3), a mounting frame (4), a cooling fan (5), a filter (6), a guide rod (7), a baffle (8), and a cylinder (9). The detector (2) is installed on the upper side inside the sealed box (1). The door (3) is slidably connected to the front side of the sealed box (1). The mounting frames (4) are symmetrically installed on the left and right sides of the outer side of the sealed box (1). The cooling fan (5) is installed inside each of the two mounting frames (4). The filter (6) is installed on each of the two mounting frames (4). The cylinder (9) is installed on the rear side of the sealed box (1). The baffle (8) is connected to the telescopic end of the cylinder (9). The guide rod (7) is symmetrically fixedly connected to the left and right sides of the outer side of the sealed box (1). The baffle (8) is slidably connected to the two guide rods (7).
2. The EMC electromagnetic compatibility testing device according to claim 1, characterized in that, It also includes guide rods (10), guide seats (11), placement plates (12), fixing blocks (13), screws (14) and motors (15). Multiple fixing blocks (13) are evenly spaced and fixedly connected to the lower side of the sealed box (1). Guide rods (10) are fixedly connected between the two fixing blocks (13) on the left side and between the two fixing blocks (13) on the right side. Screws (14) are threadedly connected between the two fixing blocks (13) in the middle. A motor (15) is installed on the rear side of the sealed box (1). The output shaft of the motor (15) passes through the sealed box (1) and is fixedly connected to the screws (14). Placement plates (12) are slidably connected to the screws (14). Placement plates (12) are slidably connected to the two guide rods (10). Guide seats (11) are symmetrically fixedly connected to the left and right sides inside the sealed box (1). Placement plates (12) are slidably engaged with the two guide seats (11).
3. An EMC electromagnetic compatibility testing device according to claim 2, characterized in that, It also includes a protective shell (151), which is connected to the rear side of the sealed box (1).
4. An EMC electromagnetic compatibility testing device according to claim 3, characterized in that, A handle is provided on the left side of the front of the box door (3).
5. An EMC electromagnetic compatibility testing device according to claim 4, characterized in that, The dimensions of the placement plate (12) are designed to fit snugly inside the two guide seats (11).
6. An EMC electromagnetic compatibility testing device according to claim 5, characterized in that, The box door (3) has a glass window in the middle.