Liquid cooled test machine

Abstract

The utility model discloses a liquid cooling test machine, it includes: machine table, liquid storage bin, liquid level sensor and support frame, be provided with temperature sensor in the liquid storage bin, and liquid level sensor sets up in the liquid storage bin and can detect the solution amount in the liquid storage bin, support frame is provided with a plurality of mounting chamber, and the part of mounting chamber is hollow and is communicated to in the liquid storage bin. Liquid level sensor carries out real -time monitoring to the liquid level state in the liquid storage bin, and once liquid level is lower than safety threshold value, and system can send alarm and take measures promptly, prevent because liquid shortage leads to equipment damage or test interruption, guarantee the continuity of test process and the security of equipment. The hollow mounting chamber design of support frame ensures that PCB board is in contact with coolant fully in the test process, and the heat dissipation effect is strengthened, and liquid is allowed to flow freely simultaneously, avoids the local overheating problem that liquid stagnation can lead to.

Description

Technical Field

[0001] This utility model relates to the field of electronic component manufacturing, and in particular to a liquid-cooled testing machine. Background Technology

[0002] As is well known, precise temperature control is required for thermal resistance testing during PCB board testing. Traditional methods often suffer from temperature fluctuations due to environmental factors, affecting test accuracy. Therefore, PCB boards are currently often tested in a liquid-cooled environment. However, liquid cooling systems are prone to temperature control failure due to changes in the solution volume, leading to distorted test results. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a liquid-cooled testing machine that can stably test PCB boards.

[0004] A liquid-cooled testing machine includes: a machine base, a liquid storage tank, a liquid level sensor, and a support frame. The liquid storage tank is disposed on the machine base and contains a temperature sensor. The liquid storage tank has multiple liquid inlets, at least one of which is used for liquid inflow and at least one of which is used for liquid outflow. The liquid level sensor is disposed within the liquid storage tank and can detect the amount of solution within it. The support frame is disposed within the liquid storage tank and has multiple mounting chambers for loading test pieces. Parts of the mounting chambers are open and connected to the liquid storage tank. The temperature sensor within the liquid storage tank monitors the liquid temperature in real time and, in conjunction with the liquid cooling system, quickly adjusts the temperature to ensure the PCB board remains in a constant temperature environment during testing. This effectively avoids testing errors caused by temperature fluctuations and improves the reliability of the test results. The liquid level sensor monitors the liquid level in the reservoir in real time. If the liquid level falls below a safe threshold, the system quickly issues an alarm and takes measures to prevent equipment damage or test interruption due to insufficient liquid, ensuring the continuity of the testing process and the safety of the equipment. The perforated mounting chamber design of the support bracket ensures full contact between the PCB board and the coolant during testing, enhancing heat dissipation while allowing free liquid flow, avoiding localized overheating problems that may result from liquid stagnation. This design not only improves the efficiency of a single test but also extends the equipment's lifespan and reduces maintenance costs, providing an efficient, stable, and safe solution for PCB thermal resistance testing.

[0005] In some embodiments, referring to the figure, each of the cold liquid connectors is divided into two groups, and the two groups of cold liquid connectors are respectively connected to both sides of the liquid storage tank and are used for liquid inflow and liquid outflow respectively.

[0006] In some embodiments, referring to the figure, a drain valve is provided at the bottom of the liquid storage tank, and the drain valve connects the inner and outer sides of the liquid storage tank.

[0007] In some embodiments, referring to the figure, the machine is provided with a receiving box located below the drain valve and capable of receiving the fluid discharged by the drain valve.

[0008] In some embodiments, referring to the figures, each of the mounting chambers is provided with at least one passageway connecting the interior of the mounting chamber to the exterior of the support frame.

[0009] In some embodiments, referring to the figures, a plurality of the mounting chambers are arranged in a rectangular array, with two adjacent mounting chambers of different heights connected by the passageway, and the mounting chambers located at the edge of the rectangular array connected to the outside of the support frame by the passageway.

[0010] In some embodiments, referring to the figures, the top of the support frame is provided with a handle, the top of the liquid storage tank is provided with an opening, the support frame can enter or leave the liquid storage tank through the opening, and a cover is movably provided at the opening.

[0011] In some embodiments, referring to the figures, the liquid storage tank is provided with a hinge and a latch, the hinge being located on one side of the cap and connected to the cap, and the latch being located on the other side of the cap and capable of impeding or preventing the movement of the cap.

[0012] In some embodiments, referring to the figure, the inner wall of the liquid storage tank is provided with a positioning support bar, which abuts against the outer wall of the support frame and can perform relative positioning between the liquid storage tank and the support frame.

[0013] In some embodiments, referring to the figures, at least one of the temperature sensor and the liquid level sensor is electrically connected to a PID controller.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a liquid-cooled testing machine according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the liquid storage tank of the liquid-cooled testing machine is shown; Figure 3 for Figure 1The diagram shows the internal structure of the liquid storage tank of the liquid-cooled testing machine. Figure 4 for Figure 1 An exploded view of the liquid storage tank of the liquid-cooled testing machine is shown. Reference numerals: Machine base 100; Cover 200; Hinge 230; Lock 250; Liquid storage tank 300; Opening 305; Cold liquid connector 310; Positioning support bar 340; Drain valve 380; Support frame 500; Handle 530; Installation chamber 550; Passage 555; Receiving box 800; Detailed Implementation The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0018] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0019] Reference Figure 1A liquid-cooled testing machine includes: a machine base 100, a liquid storage tank 300, a liquid level sensor, and a support frame 500; the liquid storage tank 300 is disposed on the machine base 100, a temperature sensor is disposed inside the liquid storage tank 300, and the liquid storage tank 300 is provided with multiple cold liquid connectors 310, at least one cold liquid connector 310 is used for liquid to enter the liquid storage tank 300, and at least one cold liquid connector 310 is used for liquid to leave the liquid storage tank 300; the liquid level sensor is disposed inside the liquid storage tank 300 and is capable of detecting the amount of solution in the liquid storage tank 300; the support frame 500 is disposed inside the liquid storage tank 300, and the support frame 500 is provided with multiple mounting chambers 550, the mounting chambers 550 are used for loading test pieces, and a portion of the mounting chambers 550 is hollow and connected to the liquid storage tank 300. A temperature sensor within the liquid reservoir 300 monitors the liquid temperature in real time, working in conjunction with the liquid cooling system for rapid adjustment. This ensures the PCB board remains in a constant temperature environment throughout the testing process, effectively preventing testing errors caused by temperature fluctuations and improving the reliability of test results. A level sensor monitors the liquid level in the reservoir 300 in real time. If the level falls below a safe threshold, the system quickly issues an alarm and takes measures to prevent equipment damage or test interruption due to insufficient liquid, ensuring the continuity of the testing process and the safety of the equipment. The perforated mounting chamber 550 of the support bracket 500 ensures full contact between the PCB board and the coolant during testing, enhancing heat dissipation while allowing free liquid flow, avoiding localized overheating problems that may result from liquid stagnation. This design not only improves the efficiency of a single test but also extends the equipment's lifespan, reduces maintenance costs, and provides an efficient, stable, and safe solution for PCB thermal resistance testing.

[0020] It is conceivable that the coolant reservoir 300 can be connected to a cooling unit, which is used to rapidly reduce the coolant temperature in high-temperature environments. When the ambient temperature is too high or the test load is heavy, the cooling unit will activate to ensure that the coolant temperature is maintained at an ideal level, thereby improving test efficiency and the equipment's ability to cope with high-load operations.

[0021] In some embodiments, reference is made to Figure 2 Each coolant connector 310 is divided into two groups, which are respectively connected to both sides of the coolant reservoir 300 and used for liquid inflow and outflow. The coolant is injected from one side, fully absorbs heat within the reservoir 300, and then flows out from the other side. This layout ensures the longest possible flow path for the coolant within the reservoir 300, thereby maximizing heat exchange efficiency and preventing localized overheating or undercooling. Compared to a single-location coolant connector 310, this design distributes the coolant flow more evenly, reducing the risk of damage from direct liquid impact on the PCB board. It also improves the temperature uniformity within the entire reservoir 300, further enhancing testing accuracy and stability, and is suitable for various temperature-sensitive PCB board testing scenarios.

[0022] Furthermore, a flow regulating valve is installed on the pipe connected to the coolant connector 310 to precisely control the inflow and outflow rates of the coolant. Operators can adjust the flow rate in real time according to the testing requirements of different PCB boards and the current temperature conditions, optimizing heat exchange efficiency and improving testing accuracy and equipment adaptability.

[0023] In some embodiments, reference is made to Figure 2 A drain valve 380 is installed at the bottom of the liquid storage tank 300, connecting the inner and outer sides of the tank. This drain valve 380 provides a convenient way for rapid liquid drainage. After testing or when the coolant needs to be replaced, opening the drain valve 380 quickly empties the liquid from the tank, simplifying maintenance and saving time. Furthermore, the drain valve 380 allows for rapid emptying of the tank during maintenance or cleaning, preventing potential corrosion or damage from residual liquid and extending the equipment's lifespan. Compared to other drainage methods, the drain valve 380 is more direct and efficient, precisely controlling the drainage process to ensure complete drainage when needed, while maintaining a good seal when closed to prevent leakage and improve overall equipment reliability and safety.

[0024] Specifically, the liquid level sensor is electrically connected to a liquid level alarm device, which is electrically connected to a drain valve 380. When the liquid level sensor detects that the liquid level is below the safe value, in addition to issuing an alarm, it can also automatically open the drain valve 380 to drain the remaining liquid, preventing the equipment from burning out due to insufficient liquid and enhancing equipment safety.

[0025] In some embodiments, reference is made to Figure 1 The machine tool 100 is equipped with a receiving box 800, located below the drain valve 380, which receives the fluid discharged from the drain valve 380. The receiving box 800, positioned below the drain valve 380, collects the discharged liquid, effectively preventing it from dripping directly onto the machine tool 100 or the ground. This design avoids liquid accumulation on the machine tool 100, reducing the risk of slipping and equipment damage, and maintaining a clean and safe working environment. The presence of the receiving box 800 also facilitates centralized treatment or recycling of the discharged liquid, meeting environmental protection requirements and reducing operating costs. Compared to designs without the receiving box 800, this design significantly improves the practicality and environmental friendliness of the equipment, especially suitable for testing scenarios requiring frequent coolant changes or drainage, reducing maintenance workload and pollution to the surrounding environment.

[0026] It is conceivable that a level gauge and a return pump are installed inside the receiving tank 800. The level gauge monitors the liquid volume inside the receiving tank 800, and the return pump can transport the collected liquid back to the storage tank 300, realizing the recycling of coolant, reducing waste, lowering testing costs, and improving the environmental performance of the equipment.

[0027] In some embodiments, reference is made to Figure 3 Each mounting chamber 550 is equipped with at least one through-hole 555, which connects the interior of the mounting chamber 550 to the exterior of the support frame 500. The through-hole 555 optimizes the liquid flow path. During testing, coolant can freely enter and exit the mounting chamber 550 through the through-hole 555, ensuring dynamic renewal of the liquid around the PCB board, avoiding localized temperature rises caused by liquid stagnation, and enhancing heat dissipation efficiency. Compared to a closed mounting chamber 550, the through-hole 555 ensures sufficient contact between the liquid and the PCB board, enhancing heat transfer and guaranteeing temperature uniformity of the PCB board during testing. This is significant for improving the accuracy of thermal resistance testing and is particularly suitable for multi-point and long-term testing applications.

[0028] In some embodiments, reference is made to Figure 3 Multiple mounting chambers 550 are arranged in a rectangular array. Adjacent mounting chambers 550 with different heights are connected by a passageway 555. The mounting chambers 550 located at the edge of the rectangular array are connected to the outside of the support frame 500 via passageways 555. This rectangular array arrangement, with adjacent chambers 550 at different heights connected by passageways 555 and edge chambers connected to the outside of the support frame 500, achieves orderly liquid flow and temperature uniformity. The coolant forms a natural flow circulation within the reservoir 300, flowing from lower-positioned mounting chambers 550 to higher-positioned chambers 550, and then returning to the outside of the support frame 500 via the edge chambers 550. This flow pattern helps to evenly distribute heat and avoid localized overheating. The rectangular array layout improves space utilization, increases the number of PCBs that can be tested per cycle, and ensures that each PCB receives sufficient coolant supply and effective heat dissipation, improving testing efficiency and overall equipment performance. It meets the needs of high-throughput testing and is particularly suitable for PCB thermal resistance testing in large-scale production environments.

[0029] In some embodiments, reference is made to Figure 4The support frame 500 has a handle 530 on its top, and the liquid storage tank 300 has an opening 305 on its top. The support frame 500 can enter or exit the liquid storage tank 300 through the opening 305. A cover 200 is movably installed at the opening 305. The handle 530 on the top of the support frame 500 and the opening 305 and movable cover 200 on the top of the liquid storage tank 300 greatly improve the ease of operation and the flexibility of equipment use. The handle 530 provides a convenient human-machine interface for the installation, removal, and maintenance of the support frame 500. Operators can easily insert or remove the support frame 500 into or from the liquid storage tank 300 through the opening 305 without complicated disassembly steps, improving the efficiency of test preparation and cleaning. The movable design of the cap 200 provides convenient quick access to the support 500 when needed, while maintaining good sealing during testing to prevent liquid evaporation or external contaminants from entering the storage tank 300. This ensures the stability of the testing environment and the purity of the liquid, extends the service life and maintenance cycle of the equipment, and provides users with a more user-friendly and efficient testing experience.

[0030] In some embodiments, reference is made to Figure 3 The liquid storage tank 300 is equipped with a hinge 230 and a latch 250. The hinge 230 is located on one side of the cap 200 and connected to it, while the latch 250 is located on the other side of the cap 200 and can impede or prevent the movement of the cap 200. The hinge 230 and latch 250 are used to connect and secure the cap 200, ensuring the ease and reliability of its operation. The hinge 230 allows the cap 200 to be easily opened and closed without disassembling any parts, simplifying the operation process. The latch 250 provides additional safety for the cap 200, preventing it from opening automatically due to accidental vibration or pressure changes during testing, ensuring the safety of the testing process and the sealing of the liquid. Compared to ordinary fastening designs, the combination of hinge 230 and latch 250 not only ensures the sealing performance of the cover 200, but also improves the ease of operation and the overall safety of the equipment, reducing the risk of liquid leakage caused by problems with the cover 200. It is particularly suitable for application scenarios that require frequent opening and closing of the cover 200 or testing in vibration environments.

[0031] In some embodiments, reference is made to Figure 4The inner wall of the liquid storage tank 300 is equipped with a positioning support strip 340. The positioning support strip 340 rests against the outer wall of the support frame 500 and provides relative positioning between the liquid storage tank 300 and the support frame 500. The positioning support strip 340 on the inner wall of the liquid storage tank 300 improves installation accuracy and stability by ensuring the support frame 500 is accurately positioned within the liquid storage tank 300. This prevents collisions between the PCB board and the wall of the liquid storage tank 300 or other components that might occur due to misalignment of the support frame 500, protecting the equipment and test pieces. The positioning effect of the positioning support strip 340 also helps optimize the liquid flow path, ensuring uniform distribution and smooth flow of liquid around the support frame, improving the uniformity and reliability of the test. Compared to simple free placement, the positioning support bar 340 provides stable support for the support frame 500, enhances the equipment's vibration resistance during testing, ensures long-term stable operation, and has a significant effect on improving the repeatability of test results and the service life of the equipment.

[0032] In some embodiments, reference is made to Figure 1 At least one of the temperature sensor and the liquid level sensor is electrically connected to a PID controller. The connection between the temperature sensor and the liquid level sensor and the PID controller enables highly automated and precise control of the temperature and liquid level within the storage tank 300. Based on real-time data from the temperature sensor and the liquid level sensor, the PID controller rapidly adjusts the operating parameters of the cooling system and the liquid replenishment system to ensure that the temperature and liquid level within the storage tank 300 are always maintained within the set range. This automatic control function not only improves the stability and safety of the testing process but also reduces the need for manual intervention, lowering the workload and error risk for operators. Compared to manual control or simple automatic control, PID control can respond to various interference factors more quickly and accurately, maintaining the consistency of the testing environment, thereby improving the accuracy and repeatability of test results. This provides advanced technical support for PCB thermal resistance testing and is particularly suitable for applications requiring high-precision testing.

[0033] Furthermore, the PID controller is equipped with a remote monitoring module, which enables remote operation and monitoring of the testing machine. Operators can use mobile phones, computers and other devices to view the equipment's operating status, temperature curve and liquid level changes in real time, and issue control commands, thereby improving the equipment's intelligence level and management efficiency. It is particularly suitable for modern and automated testing laboratory environments.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A liquid-cooled testing machine, characterized in that, include: Machine (100); A liquid storage tank (300) is provided on the machine (100). A temperature sensor is provided inside the liquid storage tank (300). The liquid storage tank (300) is provided with a plurality of cold liquid connectors (310). At least one of the cold liquid connectors (310) is used to allow liquid to enter the liquid storage tank (300), and at least one of the cold liquid connectors (310) is used to allow liquid to leave the liquid storage tank (300). A liquid level sensor is installed inside the liquid storage tank (300) and is capable of detecting the amount of solution inside the liquid storage tank (300); A support frame (500) is disposed inside the liquid storage tank (300). The support frame (500) is provided with multiple installation chambers (550). The installation chambers (550) are used to load test pieces. Part of the installation chambers (550) is hollow and connected to the liquid storage tank (300).

2. The liquid-cooled testing machine as described in claim 1, characterized in that: Each of the aforementioned cold liquid connectors (310) is divided into two groups. The two groups of cold liquid connectors (310) are respectively connected to both sides of the liquid storage tank (300) and are respectively used for liquid inflow and liquid outflow.

3. The liquid-cooled testing machine as described in claim 2, characterized in that: A drain valve (380) is provided at the bottom of the liquid storage tank (300), and the drain valve (380) connects the inner and outer sides of the liquid storage tank (300).

4. The liquid-cooled testing machine as described in claim 3, characterized in that: The machine base (100) is equipped with a receiving box (800), which is located below the drain valve (380) and is capable of receiving the fluid discharged by the drain valve (380).

5. The liquid-cooled testing machine as described in claim 1, characterized in that: Each of the mounting chambers (550) is provided with at least one opening (555) that connects the interior of the mounting chamber (550) to the exterior of the support frame (500).

6. The liquid-cooled testing machine as described in claim 5, characterized in that: The multiple mounting chambers (550) are arranged in a rectangular array. Two adjacent mounting chambers (550) with different heights are connected by the passage (555). The mounting chamber (550) located at the edge of the rectangular array is connected to the outside of the support frame (500) through the passage (555).

7. The liquid-cooled testing machine as described in claim 1, characterized in that: The support frame (500) is provided with a handle (530) at the top, and the liquid storage tank (300) is provided with an opening (305) at the top. The support frame (500) can enter or leave the liquid storage tank (300) through the opening (305). A cover (200) is movably provided at the opening (305).

8. The liquid-cooled testing machine as described in claim 7, characterized in that: The liquid storage tank (300) is provided with a hinge (230) and a latch (250). The hinge (230) is located on one side of the cover (200) and connected to the cover (200). The latch (250) is located on the other side of the cover (200) and can impede or prevent the movement of the cover (200).

9. The liquid-cooled testing machine as described in claim 7, characterized in that: The inner wall of the liquid storage tank (300) is provided with a positioning support (340), which abuts against the outer wall of the support frame (500) and can perform relative positioning between the liquid storage tank (300) and the support frame (500).

10. The liquid-cooled testing machine as described in claim 1, characterized in that: At least one of the temperature sensor and the liquid level sensor is electrically connected to a PID controller.

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