Refrigerated container control system CPU circuit board detection device

Abstract

The invention relates to the technical field of circuit board detection, and discloses a refrigerated container control system CPU circuit board detection device which comprises a detector and a frame arranged outside the detector, the frame comprises two sets of symmetrically arranged vertical plates, and a movable clamping assembly is arranged between the two sets of vertical plates. The clamping assembly comprises a movable support, and the support is used for clamping a detection probe on a detector; a mounting assembly for supporting a circuit board is arranged between the two groups of vertical plates, and the mounting assembly can move and can be overturned; and one side of the mounting assembly is provided with a dust accumulation assembly which is rotationally connected with the mounting assembly. The support capable of moving in the horizontal X direction and the horizontal Y direction is arranged in the frame to fix the detection probe, rapid positioning of the detection probe above the to-be-detected circuit board is achieved, the mounting assembly used for supporting the to-be-detected circuit board and the dust accumulation assembly used for cleaning impurities on the surface of the circuit board are further arranged, and convenience is provided for detection.

Description

Technical Field

[0001] This invention relates to the field of circuit board testing technology, specifically to a CPU circuit board testing device for a refrigerated container control system. Background Technology

[0002] Testing the circuit boards of the refrigerated container control system is a crucial step in ensuring the reliable operation of refrigerated containers. These control boards (often called refrigeration unit controllers or refrigeration controller CPU boards) are the "brain" of the system, responsible for functions such as temperature control, defrosting, data logging, sensor data acquisition, actuator driving (compressors, fans, solenoid valves, etc.), and communication (with remote monitoring systems). The circuit boards need to process sensor data such as temperature and humidity in real time to maintain a constant internal environment of the refrigerated container and prevent damage to goods due to temperature fluctuations; therefore, they require regular testing.

[0003] A circuit board inspection system, disclosed in publication number CN117191814A, includes a material rack, a circuit board scanner, a material flipping mechanism, and a material handling mechanism. The material rack has a first storage bin and a second storage bin. The circuit board scanner includes a scanning host located on the side of the material rack and a scanning platform mounted on the scanning host. The material flipping mechanism includes a flipping drive structure on the material rack and a flipping adsorption structure connected to the flipping drive structure and corresponding to the scanning platform. The material handling mechanism includes a material handling robotic arm on the material rack and a material handling adsorption structure connected to the robotic arm. The material handling adsorption structure corresponds to the first storage bin, the scanning platform, the flipping adsorption structure, and the second storage bin. This device solves the problem of manually handling, flipping, and collecting circuit boards during the inspection process, which is inconvenient, inefficient, and prone to causing product wrinkles that affect product quality.

[0004] However, the existing technology and the above-mentioned technology still have the following drawbacks: 1. The circuit board is usually moved manually to the detection position by hand, which is inefficient. Before detection, the detection position may need to be fully confirmed and locally cleaned. Therefore, the handheld detection probe affects other related operations. 2. After a certain period of use, the circuit board will not only accumulate a lot of dust on its surface, but impurities may also get stuck between the components, which may affect the test results. Summary of the Invention

[0005] This invention provides a CPU circuit board testing device for a refrigerated container control system, which solves the problems mentioned in the background art, such as the low positioning efficiency caused by manually moving the circuit board to the testing position, the need for thorough confirmation and local cleaning of the testing position before testing, the handheld testing probe affecting other related operations, and the fact that after a certain period of use, the circuit board not only accumulates severe dust on its surface, but also that impurities may get stuck between the components, potentially affecting the testing results.

[0006] The present invention provides the following technical solution: a CPU circuit board testing device for a refrigerated container control system, comprising a testing instrument and a frame disposed outside the testing instrument. The frame includes two sets of symmetrically arranged upright plates, and a movable clamping assembly is disposed between the two sets of upright plates. The clamping assembly includes a movable support for clamping a testing probe on the testing instrument. A mounting assembly for supporting the circuit board is disposed between the two sets of upright plates. The mounting assembly is movable and rotatable. A dust collection assembly is rotatably connected to one side of the mounting assembly.

[0007] As an optional solution of the CPU circuit board testing device for the refrigerated container control system described in this invention, the clamping assembly further includes a screw for driving the support to move. Two sets of first electric slides are symmetrically installed on the inner wall of the upright plate. One end of the screw is rotatably installed between the two sets of first electric slides. An internal threaded sleeve is threaded onto the surface of the screw. The internal threaded sleeve is rotatably installed inside the support. A clamping groove is provided at the bottom of the support. One end of the screw is connected to a motor.

[0008] As an optional solution of the CPU circuit board testing device for the refrigerated container control system described in this invention, wherein: a first guide rod is connected between the two sets of first electric slides, the first guide rod passes through the support, the support and the first guide rod are slidably connected, and fins are symmetrically arranged on the outer wall of the first guide rod.

[0009] As an optional solution of the CPU circuit board testing device for the refrigerated container control system described in this invention, wherein: a support rod is connected between the first electric slides, an airbag is connected between two adjacent sets of supports, the airbag is sleeved on the outer wall of the support rod, one end of the airbag is connected to an air pipe, an air chamber is fixedly installed at the bottom of the support, an exhaust port is opened at the bottom of the air chamber, and the air pipe and the air chamber are connected.

[0010] As an optional solution of the CPU circuit board testing device for the refrigerated container control system described in this invention, the mounting assembly includes a support plate, a rotary cylinder is mounted on one side of the support base, a clamping cylinder is connected to the output shaft end of the rotary cylinder, and a clamping plate is connected to the output shaft end of the clamping cylinder.

[0011] As an optional embodiment of the CPU circuit board testing device for a refrigerated container control system according to the present invention, wherein: two sets of second electric slides are provided between the two sets of upright plates, a support plate is installed on the sliding block of the second electric slide, the support seat is slidably connected to the support plate, a positioning plate is fixedly installed on the support plate, two sets of second guide rods are slidably installed inside the positioning plate, one end of the second guide rod is fixedly connected to one side of the support seat, a spring is connected between the support seat and the positioning plate, and the spring is sleeved on the outside of the second guide rod.

[0012] As an optional solution of the CPU circuit board testing device for the refrigerated container control system described in this invention, the dust collection component includes a support plate, and an electrostatic dust-collecting rod is provided at the center of the bottom surface of the support plate. The electrostatic dust-collecting rod is configured as a hollow rod structure, and the surface of the electrostatic dust-collecting rod is provided with a fine fiber layer that can generate static electricity.

[0013] As an optional solution of the CPU circuit board testing device for the refrigerated container control system described in this invention, the dust accumulation component further includes paddles symmetrically arranged on both sides of the electrostatic dust collection rod. The paddles are flexible structures and are in a bent state when in contact with the circuit board.

[0014] As an optional solution of the CPU circuit board testing device for the refrigerated container control system described in this invention, wherein: a rotating plate is connected to both ends of the support plate, a torsion spring sleeve is provided inside the rotating plate, a support shaft is connected inside the torsion spring sleeve, and one end of the support shaft is fixedly connected to the inner wall of the upright plate.

[0015] As an optional solution of the CPU circuit board testing device for the refrigerated container control system described in this invention, wherein: a flip plate is installed on the rotating plate, the flip plate is configured as an L-shaped structure, a push rod is connected to one side of the sliding block of the first electric slide, and when the push rod moves to the push rod position, it can drive the support plate to swing around the support shaft.

[0016] The present invention has the following beneficial effects: 1. The CPU circuit board testing device for a refrigerated container control system fixes the testing probe by setting a support that can move horizontally in the X and Y directions within the frame, thereby achieving rapid positioning of the testing probe above the circuit board to be tested. It also includes an installation component for supporting the circuit board to be tested and a dust collection component for cleaning impurities from the surface of the circuit board, thus facilitating testing. 2. The CPU circuit board testing device for a refrigerated container control system uses airbags between adjacent supports. During the movement of the supports, the airbags are squeezed and stretched to achieve gas circulation. The gas in the air chamber is released through the bottom exhaust port to form a stable airflow system. The gas released through the exhaust port is used to blow away impurities and dust on the circuit board to be tested placed below. 3. The CPU circuit board detection device for a refrigerated container control system includes a dust collection component consisting of a support plate and an electrostatic dust collection rod. The dust particles on the surface of the circuit board are drawn into the suction chamber by electrostatic adsorption, thereby cleaning the circuit board. Two rows of paddles are symmetrically arranged on both sides of the electrostatic dust collection rod. The paddles are made of elastic material and can make slight contact with the surface of the circuit board during the dust collection process to help peel off dust and impurities from the circuit board, while enhancing the dust adsorption effect of the electrostatic dust collection rod. 4. The CPU circuit board testing device for a refrigerated container control system has rotating plates connected to both ends of a support plate. The rotating plates are rotatably connected to one side of a vertical plate via a support shaft. A flip plate is set above the rotating plates. A push rod is connected to one side of the sliding block of the first electric slide. During the movement of the push rod, it can push the flip plate, thereby causing the dust accumulation component at the bottom of the rotating plate to flip at a certain angle. After the support plate flips up, the dust adsorbed on the lever and the electrostatic dust collector can be blown away, ensuring that the cleaning function of the lever and the electrostatic dust collector is maintained during subsequent use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention from the perspective of the front view.

[0018] Figure 2 This is a front-view perspective three-dimensional structural diagram of the clamping component of the present invention.

[0019] Figure 3 This is a bottom-view perspective view of the clamping assembly of the present invention.

[0020] Figure 4 This is a partially enlarged schematic diagram of the support of the present invention.

[0021] Figure 5 This is a schematic diagram of the internal structure of the framework of the present invention.

[0022] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point A in the middle.

[0023] Figure 7 This is a schematic diagram of the three-dimensional structure of the present invention viewed from below.

[0024] Figure 8 This is a side view of the three-dimensional structure of the present invention.

[0025] In the diagram: 1. Detector; 2. Vertical plate; 3. First electric slide; 4. Support; 5. First guide rod; 6. Clamping groove; 7. Screw; 8. Internal threaded sleeve; 9. Airbag; 10. Air pipe; 11. Air chamber; 12. Support rod; 13. Motor; 14. Clamping cylinder; 15. Second electric slide; 16. Support base; 17. Rotary cylinder; 18. Clamping plate; 19. Positioning plate; 20. Second guide rod; 21. Spring; 22. Support plate; 23. Flipping plate; 24. Support shaft; 25. Torsion spring sleeve; 26. Support plate; 27. Paddle; 28. Electrostatic dust collector; 29. ​​Rotating plate; 30. Push rod. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1, please refer to Figures 1 to 8 The present invention discloses a CPU circuit board testing device for a refrigerated container control system, including a testing instrument 1 and a frame disposed outside the testing instrument 1. The frame includes two sets of symmetrically arranged upright plates 2 and a connecting beam between the two sets of upright plates 2.

[0028] In this embodiment, two sets of upright plates 2 are provided outside the detector 1, and the two sets of upright plates 2 are connected by a connecting beam to form a hollow frame. The detector 1 is installed inside one side of the hollow frame. On the other side of the hollow frame, a clamping component for clamping the detection probe, an installation component for supporting the circuit board to be tested, and a dust collection component for cleaning impurities on the surface of the circuit board are respectively placed to facilitate the detection.

[0029] A movable clamping assembly is provided between the two sets of upright plates 2. The clamping assembly includes a movable support 4, which is used to clamp the detection probe on the detector 1. The clamping assembly also includes a screw 7 for driving the support 4 to move. Two sets of first electric slides 3 are symmetrically installed on the inner wall of the upright plates 2. One end of the screw 7 is rotatably installed between the two sets of first electric slides 3. An internal threaded sleeve 8 is threadedly connected to the surface of the screw 7. The internal threaded sleeve 8 is rotatably installed in the support 4. A clamping groove 6 is opened at the bottom of the support 4. One end of the screw 7 is connected to a motor 13.

[0030] In this embodiment, a movable clamping assembly is provided between the two sets of upright plates 2. The clamping groove 6 opened in the support 4 is used to fix the detection probe on the detector 1. At the same time, the support rod 12 is connected between the two sets of first electric slides 3. Starting the first electric slide 3 can drive the entire clamping assembly to move horizontally in the Y direction. Starting the motor 13 drives the screw 7 to rotate, so that the internal thread sleeve 8 drives the support 4 to move horizontally in the X direction along the support rod 12, thereby realizing the rapid positioning of the detection probe above the circuit board to be tested.

[0031] The rotation of screw 7 drives the movement of support 4. Therefore, to ensure the stability of support 4 during movement and to ensure smooth horizontal movement of support 4, a first guide rod 5 is installed through support 4, and fins are symmetrically arranged on both sides of the first guide rod 5. The first guide rod 5 is used for guidance, and the fins are used to ensure that support 4 does not deflect or tilt during movement. At the same time, to improve the automation and detection accuracy of the entire detection process, this device is also equipped with a control system. The control system is electrically connected to the first electric slide 3 and motor 13, and can control the movement path and speed of the clamping components according to a preset program to achieve precise positioning of the detection probe, thereby improving detection efficiency and accuracy.

[0032] Example 2 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 8 A support rod 12 is connected between the first electric slides 3, and an airbag 9 is connected between two adjacent sets of supports 4. The airbag 9 is sleeved on the outer wall of the support rod 12. One end of the airbag 9 is connected to an air pipe 10. An air chamber 11 is fixedly installed at the bottom of the support 4. An exhaust port is opened at the bottom of the air chamber 11. The air pipe 10 and the air chamber 11 are connected.

[0033] In this embodiment, an airbag 9 is provided between adjacent supports 4. An air inlet valve is connected to the outside of the airbag 9. During the movement of the support 4, the airbag 9 is compressed and stretched. When compressed, the gas inside the airbag 9 enters the air chamber 11 through the air pipe 10. When stretched, external air is supplied to the airbag 9 through the air inlet valve, thereby realizing gas circulation. The gas in the air chamber 11 is released through the bottom exhaust port, forming a stable airflow system. The gas released through the exhaust port is used to blow away impurities and dust on the circuit board under test placed below.

[0034] Specifically, a mounting assembly for supporting the circuit board is provided between the two sets of upright plates 2. The mounting assembly is movable and can be flipped. The mounting assembly includes a support base 16. A rotary cylinder 17 is installed on one side of the support base 16. A clamping cylinder 14 is connected to the output shaft end of the rotary cylinder 17. A clamping plate 18 is connected to the output shaft end of the clamping cylinder 14.

[0035] In this embodiment, a mounting assembly for supporting the circuit board is provided between the two sets of upright plates 2. The mounting assembly includes, in sequence, a support base 16, a rotary cylinder 17, a clamping cylinder 14, and a clamping plate 18. Driven by the rotary cylinder 17, the clamping cylinder 14 can rotate, thereby causing the clamping plate 18 to flip to adapt to different angle detection requirements. The clamping cylinder 14 is responsible for controlling the clamping and releasing actions of the clamping plate 18, ensuring that the circuit board remains firmly clamped during detection and movement. In addition, the surface of the clamping plate 18 is provided with an anti-slip pad to prevent damage to the circuit board during clamping. By controlling the actions of the rotary cylinder 17 and the clamping cylinder 14 in a coordinated manner through the control system, automatic flipping and multi-angle detection of the circuit board are realized, further improving the flexibility and comprehensiveness of the detection.

[0036] It should be noted that during circuit board inspection, two sets of circuit boards can be placed back-to-back between two sets of clamping plates 18, and simultaneously clamped by the clamping cylinder 14 to ensure that the two circuit boards remain tightly attached during the flipping process. After one side of the circuit board is inspected, the rotary cylinder 17 is activated, causing the clamping plate 18 and the circuit board to flip synchronously, so that the other side of the circuit board faces upwards, thus achieving automatic flipping inspection without manual intervention. This structural design improves inspection efficiency.

[0037] Two sets of second electric slides 15 are provided between the two sets of upright plates 2. A support plate 22 is installed on the sliding block of the second electric slide 15. A support base 16 is slidably connected to the support plate 22. A positioning plate 19 is fixedly installed on the support plate 22. Two sets of second guide rods 20 are slidably installed inside the positioning plate 19. One end of the second guide rod 20 is fixedly connected to one side of the support base 16. A spring 21 is connected between the support base 16 and the positioning plate 19. The spring 21 is sleeved on the outside of the second guide rod 20.

[0038] In this embodiment, the mounting assembly also includes two sets of second electric slides 15. A tray 22 is mounted on the sliding block of the second electric slide 15, and a support base 16 is connected to the tray 22. Therefore, activating the second electric slide 15 can drive the mounting assembly and the mounted circuit board to move precisely in the horizontal direction, adapting to the testing requirements of different positions. Simultaneously, the positioning plate 19 on the tray 22 cooperates with the second guide rod 20 to provide guidance and stability for the movement of the support base 16, ensuring that the circuit board will not shift or vibrate during movement. The spring 21 effectively buffers the vibration generated during movement and increases the clamping distance between the two sets of support bases 16, thereby adapting to the clamping requirements of circuit boards of different sizes. Through the synergistic effect of the second electric slide 15 and the mounting assembly, precise positioning and stable clamping of the circuit board are achieved during the testing process, further improving the adaptability and reliability of the testing equipment. Furthermore, the second electric slide 15, the rotary cylinder 17, and the clamping cylinder 14 are all electrically connected to the aforementioned control system. Through programmed control, the linkage operation of each component is achieved, ensuring that the clamping, flipping, and moving actions of the circuit board during the testing process can be executed efficiently and orderly.

[0039] Example 3 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 8 A rotatably connected dust collection component is provided on one side of the mounting component. The dust collection component includes a support plate 26. An electrostatic dust collection rod 28 is provided at the center of the bottom surface of the support plate 26. The electrostatic dust collection rod 28 is a hollow rod structure, and the surface of the electrostatic dust collection rod 28 is provided with a fine fiber layer that can generate static electricity.

[0040] In this embodiment, a dust collection component is provided on one side above the mounting assembly. Specifically, it includes a support plate 26 and an electrostatic dust-collecting rod 28 disposed at the bottom of the support plate 26. The electrostatic dust-collecting rod 28 is a hollow structure, with its hollow part serving as a dust-collecting chamber for adsorbing and storing dust and impurities. Multiple dust-collecting holes are evenly distributed on the surface of the electrostatic dust-collecting rod 28, and these holes are connected to the internal hollow structure. Dust particles from the circuit board surface are drawn into the dust-collecting chamber through electrostatic adsorption, thereby achieving the cleaning function of the circuit board. The second electric slide 15 is activated, and the moving block within the second electric slide 15 moves to one side of the entire frame. The circuit board to be tested is inserted between the clamps 18 on both sides. The second electric slide 15 is then activated again to move it to the detection position. During this process, the electrostatic dust-collecting rod 28 performs preliminary cleaning of the circuit board surface, removing attached microparticles and preventing dust from interfering with the test results.

[0041] The dust collection assembly also includes paddles 27 symmetrically arranged on both sides of the electrostatic dust collection stick 28. The paddles 27 are flexible structures and are in a bent state when in contact with the circuit board.

[0042] In this embodiment, two rows of paddles 27 are symmetrically arranged on the electrostatic vacuum cleaner 28. The paddles 27 are made of elastic material and can make slight contact with the surface of the circuit board during the vacuuming process to help peel off dust and impurities from the circuit board, while enhancing the dust adsorption effect of the electrostatic vacuum cleaner 28.

[0043] Example 4 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 8 The support plate 26 is connected to rotating plates 29 at both ends. A torsion spring sleeve 25 is installed inside the rotating plate 29, and a support shaft 24 is connected inside the torsion spring sleeve 25. One end of the support shaft 24 is fixedly connected to the inner wall of the upright plate 2. A flip plate 23 is installed on the rotating plate 29. The flip plate 23 is designed with an L-shaped structure. A push rod 30 is connected to one side of the sliding block of the first electric slide table 3. When the push rod 30 moves to the push rod 30 position, it can drive the support plate 26 to swing around the support shaft 24.

[0044] In this embodiment, rotating plates 29 are connected to both ends of the support plate 26. The rotating plates 29 are rotatably connected to one side of the upright plate 2 via the support shaft 24. A flip plate 23 is provided above the rotating plates 29. A push rod 30 is connected to one side of the sliding block of the first electric slide 3. During the movement of the push rod 30, it can push the flip plate 23, thereby causing the dust accumulation component at the bottom of the rotating plate 29 to flip at a certain angle, so that the support plate 26 swings at a certain angle towards the support 4. Since the first electric slide 3 drives the support 4 to move towards the circuit board to be tested during the start-up process, the support 4 also moves at the same time to find the detection position. Therefore, after the support plate 26 is flipped up, the dust adsorbed on the paddle 27 and the electrostatic dust collector 28 can be blown away, ensuring that the cleaning function of the paddle 27 and the electrostatic dust collector 28 is maintained during subsequent use.

[0045] It should be noted that a torsion spring for resetting is provided between the support shaft 24 and the torsion spring sleeve 25. When the push rod 30 is retracted, the torsion spring can drive the flip plate 23 to automatically return to its original position, so that the support plate 26 returns to its initial horizontal state, thereby ensuring the stability and continuity of the entire device operation.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, goods, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, goods, or apparatus.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A CPU circuit board detection device for a refrigerated container control system, comprising a detector (1) and a frame arranged outside the detector (1), characterized in that: the frame comprises two groups of vertically arranged plates (2), and a movable clamping assembly is arranged between the two groups of plates (2), the clamping assembly comprising a movable support (4) for clamping a detection probe on the detector (1); a mounting assembly for supporting a circuit board is arranged between the two groups of plates (2), and the mounting assembly is movable and reversible; and a dust accumulation assembly is rotatably connected to one side of the mounting assembly. The clamping assembly further comprises a screw rod (7) for driving the support (4) to move, two groups of first electric sliding tables (3) are symmetrically arranged on the inner wall of the plate (2), one end of the screw rod (7) is rotatably connected between the two groups of first electric sliding tables (3), an internally threaded sleeve (8) is threadedly connected to the surface of the screw rod (7), the internally threaded sleeve (8) is rotatably arranged in the support (4), a clamping groove (6) is formed in the bottom of the support (4), and one end of the screw rod (7) is connected with a motor (13). A first guide rod (5) is connected between the two groups of first electric sliding tables (3), the first guide rod (5) penetrates into the support (4), the support (4) and the first guide rod (5) are in sliding connection, and the outer wall of the first guide rod (5) is symmetrically provided with fins. A support rod (12) is connected between the first electric sliding tables (3), a gas bag (9) is connected between adjacent two groups of supports (4), the gas bag (9) is sleeved on the outer wall of the support rod (12), one end of the gas bag (9) is communicated with a gas pipe (10), a gas chamber (11) is fixedly arranged on the bottom of the support (4), an exhaust port is formed in the bottom of the gas chamber (11), and the gas pipe (10) and the gas chamber (11) are in communication.

2. The CPU circuit board detection device of a refrigerated container control system according to claim 1, characterized in that: The mounting assembly comprises a support plate (16), a rotary air cylinder (17) is arranged on one side of the support plate (16), the output shaft end of the rotary air cylinder (17) is connected with a clamping cylinder (14), and the output shaft end of the clamping cylinder (14) is connected with a clamping plate (18).

3. The CPU circuit board detection device of a reefer container control system according to claim 2, characterized in that: Two groups of second electric sliding tables (15) are arranged between the two groups of plates (2), a supporting plate (22) is arranged on the sliding block of the second electric sliding table (15), the support plate (16) is in sliding connection with the supporting plate (22), a positioning plate (19) is fixedly arranged on the supporting plate (22), two groups of second guide rods (20) are slidably arranged in the positioning plate (19), one end of the second guide rod (20) is fixedly connected to one side of the support plate (16), a spring (21) is connected between the support plate (16) and the positioning plate (19), and the spring (21) is sleeved on the second guide rod (20).

4. The CPU circuit board detection device of a reefer container control system according to claim 2, characterized in that: The dust accumulation assembly comprises a support plate (26), a static dust removal rod (28) is arranged at the center of the bottom surface of the support plate (26), the static dust removal rod (28) is arranged in a hollow rod structure, and a fine fiber layer capable of generating static electricity is arranged on the surface of the static dust removal rod (28).

5. The CPU circuit board detection device of a reefer container control system according to claim 2, characterized in that: ​ 6. A CPU circuit board detection device for a reefer container control system according to claim 5, characterized in that: ​ 7. The CPU circuit board detection device of a reefer container control system according to claim 2, characterized in that: ​ 8. A CPU circuit board detection device for a reefer container control system according to claim 7, characterized in that: The dust collecting assembly further comprises a push piece (27) symmetrically arranged on both sides of the electrostatic dust collecting rod (28), wherein the push piece (27) is flexible, and the push piece (27) is in a bent state when being in contact with the circuit board.

9. A CPU board detection device for a reefer container control system according to claim 8, characterized in that: Both ends of the supporting plate (26) are connected with a rotating plate (29), the rotating plate (29) is internally provided with a torsion spring sleeve (25), the torsion spring sleeve (25) is internally connected with a supporting shaft (24), and one end of the supporting shaft (24) is fixedly connected with the inner wall of the vertical plate (2).

10. A CPU circuit board detection device for a reefer container control system according to claim 9, characterized in that: A turnover plate (23) is mounted on the rotating plate (29), the turnover plate (23) is arranged in an L-shaped structure, one side of the sliding block of the first electric sliding table (3) is connected with a push rod (30), and when the push rod (30) moves to the push rod (30), the supporting plate (26) can be driven to swing around the supporting shaft (24).

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