Heat dissipation module testing machine capable of improving performance testing precision

Abstract

The utility model discloses a heat radiation module group testing machine capable of improving performance test precision, the testing device comprises a blower fan, a heating source, a wind tunnel, a diffuser, a wind uniformizing device, a wind speed sensor and a control circuit, the heating source is arranged at a first end of the wind tunnel, the blower fan is arranged at a second end of the wind tunnel, the diffuser is arranged between the wind uniformizing device and the blower fan, and the wind speed sensor is arranged between the blower fan and the wind tunnel. The detection end of the wind speed sensor is inserted into the wind tunnel, the wind uniformizing device comprises a plurality of wind uniformizing plates arranged at intervals, and each wind uniformizing plate is provided with a plurality of wind uniformizing holes. The wind speed is monitored through the wind speed sensor, the fan power is adjusted in real time, the wind speed is ensured to be constant, airflow firstly passes through the diffuser to enlarge the cross section, reduce the airflow speed and reduce dynamic pressure loss, meanwhile, transverse diffusion of the airflow is promoted, then transverse vortex and turbulent flow of the airflow are eliminated through the wind uniformizing device, and the airflow direction tends to be consistent. The air flow finally blown to the heat dissipation module is kept uniform and stable, the uniformity of air pressure borne by all positions of the heat dissipation module is improved, and the testing precision is improved.

Description

A heat dissipation module testing machine to improve performance testing accuracy Technical Field

[0001] This utility model relates to the field of heat dissipation module testing machine technology, and in particular to a heat dissipation module testing machine that improves the accuracy of performance testing. Background Technology

[0002] A heatsink module is a radiator used to dissipate heat from a chip. The heatsink module's performance needs to be tested during both the design and production stages to ensure it meets design requirements and to screen out defective products. Existing heatsink module testing machines use a cylindrical air duct with a heat source at one end and a fan at the other. The heatsink module is mounted on the heat source, and the fan blows directly onto it, maintaining a constant fan power. Heatsink performance data is obtained by measuring the temperature change of the heat source. However, during testing, because the fan blows directly onto the heatsink module, the airflow is uneven, resulting in varying air pressure across different parts of the module and uneven heat dissipation. This leads to low performance test accuracy. Furthermore, the fan speed cannot be precisely adjusted; instead, it is adjusted by setting the fan power. Different sized fans produce different airflow speeds at different power levels, making the test results unreliable and lacking credibility. Therefore, improvements are necessary. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a heat dissipation module testing machine that improves the accuracy of performance testing, maintains constant wind speed, improves wind pressure uniformity, improves performance testing accuracy, and improves testing efficiency.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a heat dissipation module testing machine for improving performance testing accuracy, comprising a testing device, each testing device including a fan, a heat source, a wind tunnel, a diffuser, a wind equalizer, a wind speed sensor, and a control circuit. The heat source is located at the first end of the wind tunnel, the fan is located at the second end of the wind tunnel, the wind equalizer is located inside the wind tunnel, the diffuser is located inside the wind tunnel and between the wind equalizer and the fan, the detection end of the wind speed sensor is inserted inside the wind tunnel and located between the wind equalizer and the heat source, the heat source contains a temperature sensor, the temperature sensor, the fan, the wind speed sensor, and the heat source are electrically connected to the control circuit, and the wind equalizer includes multiple spaced wind equalizer plates, each wind equalizer plate having multiple wind equalizer holes.

[0005] In a further technical solution, the wind tunnel includes a duct, a wind distribution box, and a wind measuring tube connected in sequence. The wind distribution box is provided with an air inlet and an air outlet. The heat source is located at the first end of the wind measuring tube. The second end of the wind measuring tube is connected to the air outlet of the wind distribution box. The air inlet of the wind distribution box is connected to the first end of the duct. The second end of the duct is connected to the fan. The wind speed sensor is fixedly installed in the wind measuring tube. The detection end of the wind speed sensor is inserted into the wind measuring tube. The diffuser is located in the wind distribution box and close to the air inlet. Each wind distribution plate is arranged at intervals in the wind distribution box.

[0006] In a further technical solution, the air distributor is equipped with three air distribution plates, and the air distribution holes of the three air distribution plates are staggered.

[0007] In a further technical solution, the air distribution holes are honeycomb shaped air distribution holes.

[0008] In a further technical solution, the diffuser includes a diffuser ball and a fixing rod. The fixing rod is fixedly installed on the inner wall of the air distribution box and passes through the air inlet. The diffuser ball is fixedly installed in the middle of the fixing rod and close to the air inlet.

[0009] In a further technical solution, the heat dissipation module testing machine includes a frame and multiple testing devices, with each testing device spaced apart on the frame. The frame includes a lower housing and an upper housing, with the upper housing located at the rear of the lower housing. A testing platform is provided on the upper front surface of the lower housing. The lower housing contains a control cavity and a power cavity, with the power cavity located below the upper housing. A fan is fixedly installed in the power cavity, and the control circuit is located in the control cavity. An air distribution box is located in the upper housing, and an air measurement tube is fixedly installed on the front side of the upper housing. The heat source is located on the testing platform.

[0010] In a further technical solution, the testing device is also equipped with a testing fixture, which includes a testing base and a sealing cover. The testing base is fixedly installed on the testing platform, the heat source is fixedly installed on the testing base, and the sealing cover is placed on the upper part of the testing base. The sealing cover and the testing base enclose a testing cavity. The rear end of the sealing cover is connected to the first end of the wind measuring tube. A sealing ring is provided between the sealing cover and the wind measuring tube, and the testing cavity is connected to the wind measuring tube.

[0011] In a further technical solution, a fixing device is provided for each test device on the rack. The fixing device includes a fixing frame, a fixing slide and a fixing drive mechanism. The fixing frame is fixedly installed on the test platform, the fixing slide is slidably installed on the fixing frame, the fixing drive mechanism is connected to the fixing slide, and the fixing slide is located above the heat source.

[0012] In a further technical solution, the fixing frame includes two guide rods and a fixing seat. The lower ends of the two guide rods are fixedly installed on the test platform and located on the left and right sides of the wind measuring tube, respectively. The left and right sides of the fixing seat are fixedly installed on the upper parts of the two guide rods, respectively. The fixing seat is vertically provided with at least two slide rails, and the fixing slide is provided with at least two sliders. The two sliders are slidably connected to the two slide rails, respectively. The fixing drive mechanism includes a drive cylinder, which is fixedly installed on the upper part of the fixing seat. The piston rod of the drive cylinder is connected to the fixing slide.

[0013] In a further technical solution, the fixed slide includes a connecting plate, an adjusting plate, a fixing strip, an extension strip, and two reinforcing plates. The slider is fixedly installed on the rear side of the connecting plate, the adjusting plate is fixedly installed on the front side of the connecting plate, and the two reinforcing strips are respectively fixedly installed on the left and right ends of the connecting plate and fixedly connected to the adjusting plate. The adjusting plate has multiple adjusting and fixing holes spaced apart along the longitudinal direction. The rear end of the fixing strip is fixedly installed in the corresponding adjusting and fixing hole by screws. The extension strip is fixedly installed on the front end of the fixing strip, and the extension strip is provided with an elastic pressing member.

[0014] The elastic pressing component includes a pressing slide rod, a rubber pad, and a spring. The pressing slide rod is slidably mounted on the extension bar. The rubber pad is fixed to the lower end of the pressing slide rod. The spring is sleeved on the pressing slide rod, with the upper end of the spring abutting against the extension bar and the lower end abutting against the rubber pad.

[0015] The advantages of this invention compared to existing technologies are as follows: By using a wind speed sensor to monitor wind speed in real time and adjusting the fan power accordingly, the wind speed remains constant, improving detection accuracy. By installing a diffuser and a wind equalizer inside the wind tunnel, the air blown by the fan first passes through the diffuser to expand the cross-sectional area of ​​the airflow, reducing airflow velocity and dynamic pressure loss, while simultaneously promoting lateral diffusion. Then, the wind equalizer eliminates lateral vortices and turbulence, making the airflow direction more consistent, ensuring that the airflow finally blown onto the heat dissipation module remains uniform and stable, improving the uniformity of wind pressure at various locations on the heat dissipation module, further enhancing testing accuracy. By setting multiple independent testing devices on the rack for multi-station testing, testing efficiency is improved, and by changing the testing fixture to adapt to different models of heat dissipation modules, the applicability is expanded. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 is a structural schematic diagram of this utility model;

[0018] Figure 2 is an enlarged view of part A of Figure 1 of this utility model;

[0019] Figure 3 is a cross-sectional view of this utility model;

[0020] Figure 4 is a partial structural schematic diagram of the air distribution device of this utility model;

[0021] Figure 5 is a structural schematic diagram of the fixing device of this utility model.

[0022] In the picture:

[0023] 1. Testing device; 11. Fan; 12. Heat source; 131. Air duct; 132. Air distribution box; 1321. Air inlet; 1322. Air outlet; 133. Anemometer tube; 14. Diffuser; 141. Diffuser ball; 142. Fixing rod; 151. Air distribution plate; 152. Air distribution hole; 16. Wind speed sensor.

[0024] 2. Frame, 21. Upper housing, 22. Lower housing, 221. Test platform, 222. Control chamber, 223. Power chamber;

[0025] 3 Test fixture, 31 Test base, 32 Sealing cover, 33 Test chamber;

[0026] 4 Fixing device, 41 Guide rod, 42 Fixing seat, 421 Connecting plate, 422 Adjusting plate, 423 Fixing strip, 424 Extension strip, 425 Reinforcing plate, 426 Slide rail, 427 Slider, 428 Adjusting fixing hole, 43 Drive cylinder, 44 Elastic pressing part, 441 Pressing slide rod, 442 Rubber pad, 443 Spring. Detailed Implementation

[0027] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0028] A heat dissipation module testing machine for improving performance testing accuracy, as shown in Figures 1 to 5, includes a testing device 1. Each testing device 1 includes a fan 11, a heat source 12, a wind tunnel, a diffuser 14, a wind equalizer, a wind speed sensor 16, and a control circuit. The heat source 12 is located at the first end of the wind tunnel, the fan 11 is located at the second end of the wind tunnel, the wind equalizer is located inside the wind tunnel, the diffuser 14 is located inside the wind tunnel and between the wind equalizer and the fan 11, the detection end of the wind speed sensor 16 is inserted inside the wind tunnel and located between the wind equalizer and the heat source 12, and the heat source 12 contains a temperature sensor. The temperature sensor, the fan 11, the wind speed sensor 16, and the heat source 12 are electrically connected to the control circuit. The wind equalizer includes multiple spaced wind equalizer plates 151, and each wind equalizer plate 151 has multiple wind equalizer holes 152. Traditional heat dissipation module testing machines use one or more fans to blow air directly onto the heat dissipation module, testing with a constant fan power. However, this direct airflow leads to uneven airflow and inconsistent air pressure across the heat dissipation module. Furthermore, adjusting fan power cannot precisely control the airflow speed, resulting in variations and low test accuracy and reliability. This invention, however, uses a wind speed sensor 16 to monitor the airflow in real time and adjusts the power of the fan 11 accordingly to ensure a constant airflow and improve testing accuracy. By incorporating a diffuser 14 and an air equalizer within the wind tunnel, the air blown by the fan 11 first passes through the diffuser 14 to expand the cross-sectional area of ​​the airflow, reducing airflow velocity and dynamic pressure loss, while also promoting lateral diffusion. Then, the air equalizer eliminates lateral vortices and turbulence, aligning the airflow direction and ensuring a uniform and stable airflow towards the heat dissipation module. This improves the uniformity of air pressure across the module and further enhances testing accuracy.

[0029] Specifically, the wind tunnel includes a duct 131, a wind distribution box 132, and a wind measuring tube 133 connected in sequence. The wind distribution box 132 is provided with an air inlet 1321 and an air outlet 1322. A heat source 12 is provided at the first end of the wind measuring tube 133. The second end of the wind measuring tube 133 is connected to the air outlet 1322 of the wind distribution box 132. The air inlet 1321 of the wind distribution box 132 is connected to the first end of the duct 131. The second end of the duct 131 is connected to the fan 11. A wind speed sensor 16 is fixedly installed in the wind measuring tube 133. The detection end of the wind speed sensor 16 is inserted into the wind measuring tube 133. A diffuser 14 is provided in the wind distribution box 132 and close to the air inlet 1321. Each wind distribution plate 151 is provided at intervals in the wind distribution box 132. The fan 11 is connected to the air distribution box 132 via the air duct 131. The fan 11 can be installed in any position to improve the structural compactness of the heat dissipation module tester and reduce its size. The fan 11 can be a turbine fan to reduce the power of the fan 11, increase the air volume, and reduce energy consumption. The air outlet of the fan 11 is often small in diameter and has a high air speed. The diffuser 14 expands the cross-sectional area of ​​the airflow, slows down the airflow, reduces the airflow speed and reduces dynamic pressure loss, and promotes the lateral diffusion of the airflow. After diffusion, the airflow enters the air distribution box 132 and passes through the air distribution holes 152 of each air distribution plate 151 in sequence, eliminating the lateral vortex and turbulence of the airflow and making the airflow direction more consistent, further promoting the uniformity of the airflow. The uniform airflow is finally blown to the heat dissipation module through the air measuring tube 133. The wind speed sensor 16 monitors the airflow in the air measuring tube 133 in real time to control the power of the fan 11 and ensure that the wind speed is constant.

[0030] Specifically, the wind equalizer is equipped with three wind equalizer plates 151, and the wind equalizer holes 152 of the three wind equalizer plates 151 are staggered. The first wind equalizer plate 151 can cut large-sized eddies, thereby reducing the lateral pulsation of the airflow and making the airflow velocity and direction entering the wind measuring tube 133 more uniform, avoiding the distortion of experimental data due to turbulence interference. The second and third wind equalizer plates 151 weaken the turbulence energy step by step, reduce the turbulence intensity, avoid small-scale turbulence interference with high test accuracy, and further improve the test accuracy. As shown in Figure 4, the wind equalizer holes 152 of each wind equalizer plate 151 are staggered to avoid the wind equalizer holes 152 aligning and causing the next level wind equalizer plate 151 to fail.

[0031] Specifically, the air distribution orifice 152 is a honeycomb-shaped air distribution orifice 152. The honeycomb-shaped air distribution orifice 152 helps to cut large-scale vortices into countless small, parallel airflow streams.

[0032] Specifically, the diffuser 14 includes a diffusion ball 141 and a fixing rod 142. The fixing rod 142 is fixedly installed on the inner wall of the air distribution box 132 and passes through the air inlet 1321. The diffusion ball 141 is fixedly installed in the middle of the fixing rod 142 and close to the air inlet 1321. The diffusion ball 141 is fixedly installed on the inner wall of the air distribution box 132 by the fixing rod 142, which facilitates disassembly and assembly. The diffusion angle can be adjusted by adjusting the distance between the diffusion ball 141 and the air inlet 1321.

[0033] Specifically, the heat dissipation module testing machine includes a frame 2 and multiple testing devices 1, which are spaced apart on the frame 2. The frame 2 includes a lower housing 22 and an upper housing 21. The upper housing 21 is located at the rear of the lower housing 22. A testing platform 221 is provided on the upper front surface of the lower housing 22. The lower housing 22 contains a control cavity 222 and a power cavity 223. The power cavity 223 is located below the upper housing 21. A fan 11 is fixedly installed in the power cavity 223, and the control circuit is located in the control cavity 222. An air distribution box 132 is located in the upper housing 21, and an air measuring tube 133 is fixedly installed on the front side of the upper housing 21. A heat source 12 is located on the testing platform 221. By setting multiple independent testing devices 1 on the frame 2 for multi-station testing, the testing efficiency is improved. The air duct 131 is fully utilized to connect the air distribution box 132 and the fan 11, thereby reducing the length of the air duct and the overall size of the heat dissipation module testing machine.

[0034] Specifically, the testing device 1 is further equipped with a testing fixture 3, which includes a testing base 31 and a sealing cover 32. The testing base 31 is fixedly installed on the testing platform 221, and the heat source 12 is fixedly installed on the testing base 31. The sealing cover 32 covers the upper part of the testing base 31, and the sealing cover 32 and the testing base 31 enclose a testing cavity 33. The rear end of the sealing cover 32 is connected to the first end of the air measuring tube 133, and a sealing ring is provided between the sealing cover 32 and the air measuring tube 133. The testing cavity 33 is connected to the air measuring tube 133. The testing base 31 is used to position the heat dissipation module, which facilitates loading and unloading. When testing different models of heat dissipation modules, the corresponding testing base 31 can be quickly replaced, improving the applicability. The sealing cover 32 connects the air measuring tube 133 and the heat dissipation module, preventing the airflow blown out of the air measuring tube 133 from overflowing from both sides of the heat dissipation module, ensuring that the airflow is completely directed to the heat dissipation module, thus ensuring a constant airflow and further improving the testing accuracy.

[0035] Specifically, each test device 1 is positioned on the rack 2 with a fixing device 4. The fixing device 4 includes a fixing frame, a fixing slide, and a fixing drive mechanism. The fixing frame is fixedly installed on the test platform 221, the fixing slide is slidably installed on the fixing frame, and the fixing drive mechanism is connected to the fixing slide. The fixing slide is located above the heat source 12. After the heat dissipation module is positioned on the test base 31, the fixing device 4 presses and fixes the heat dissipation module on the test base 31 to prevent excessive airflow from blowing the heat dissipation module over.

[0036] Specifically, the mounting bracket includes two guide rods 41 and a mounting base 42. The lower ends of the two guide rods 41 are fixedly installed on the test platform 221 and located on the left and right sides of the anemometer 133, respectively. The left and right sides of the mounting base 42 are fixedly installed on the upper parts of the two guide rods 41, respectively. The mounting base 42 is vertically provided with at least two slide rails 426, and the mounting base is provided with at least two sliders 427. The two sliders 427 are slidably connected to the two slide rails 426, respectively. The fixed drive mechanism includes a drive cylinder 43, which is fixedly installed on the upper part of the mounting base 42. The piston rod of the drive cylinder 43 is connected to the mounting base. The mounting base is driven up and down by the drive cylinder 43 to press against the heat dissipation module. The structure is simple and the cost is low. The mounting base 42 is fixed to the two guide rods 41 by a clamp, which can be adjusted according to the height of the heat dissipation module to shorten the stroke of the drive cylinder 43, improve the testing efficiency, and further expand the scope of application to meet the testing of heat dissipation modules of different sizes.

[0037] Specifically, the fixed slide includes a connecting plate 421, an adjusting plate 422, a fixing strip 423, an extension strip 424, and two reinforcing plates 425. A slider 427 is fixedly installed on the rear side of the connecting plate 421, and the adjusting plate 422 is fixedly installed on the front side of the connecting plate 421. The two reinforcing strips are respectively fixedly installed on the left and right ends of the connecting plate 421 and fixedly connected to the adjusting plate 422. The adjusting plate 422 has multiple adjusting and fixing holes 428 spaced apart along the longitudinal direction. The rear end of the fixing strip 423 is fixedly installed to the connecting plate 425 by screws. Within the corresponding adjustment and fixing hole 428, the extension bar 424 is fixedly installed at the front end of the fixing bar 423. The extension bar 424 is provided with an elastic pressing member 44, which includes a pressing slide bar 441, a rubber pad 442, and a spring 443. The pressing slide bar 441 is slidably installed on the extension bar 424. The rubber pad 442 is fixed to the lower end of the pressing slide bar 441. The spring 443 is sleeved on the pressing slide bar 441. The upper end of the spring 443 abuts against the extension bar 424, and the lower end abuts against the rubber pad 442. The fixing strip 423 is fixed to the adjusting fixing hole 428 by screws. According to the size and position of the heat dissipation module, the fixing strip 423 is fixed to the corresponding adjusting fixing hole 428 to ensure that the elastic pressing member 44 presses against the middle of the heat dissipation module, improves the uniformity of force, and can adapt to heat dissipation modules of different sizes. The elastic pressing member 44 releases the pressure on the heat dissipation module, and the rubber pad 442 contacts the heat dissipation module to prevent the pressure from causing indentations on the heat dissipation module. The spring 443 provides elastic potential energy to the elastic pressing member 44 to avoid excessive pressure that could damage the heat dissipation module.

[0038] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A heat dissipation module testing machine for improving performance testing accuracy, comprising a testing device (1), characterized in that: The test device (1) includes a fan (11), a heat source (12), a wind tunnel, a diffuser (14), an air equalizer, a wind speed sensor (16), and a control circuit. The heat source (12) is located at the first end of the wind tunnel, the fan (11) is located at the second end of the wind tunnel, the air equalizer is located inside the wind tunnel, the diffuser (14) is located inside the wind tunnel and between the air equalizer and the fan (11), the detection end of the wind speed sensor (16) is inserted inside the wind tunnel and is located between the air equalizer and the heat source (12), the heat source (12) contains a temperature sensor, and the temperature sensor, the fan (11), the wind speed sensor (16) and the heat source (12) are electrically connected to the control circuit respectively. The air equalizer includes multiple air equalizer plates (151) arranged at intervals, and each air equalizer plate (151) has multiple air equalizer holes (152).

2. The heat dissipation module testing machine for improving performance testing accuracy according to claim 1, characterized in that: The wind tunnel includes a duct (131), an air distribution box (132), and an anemometer (133) connected in sequence. The air distribution box (132) is provided with an air inlet (1321) and an air outlet (1322). The heat source (12) is located at the first end of the anemometer (133), and the second end of the anemometer (133) is connected to the air outlet (1322) of the air distribution box (132). The air inlet (1321) of the air distribution box (132) is connected to the duct. The first end of (131) is connected, the second end of the air duct (131) is connected to the fan (11), the wind speed sensor (16) is fixedly installed in the wind measuring tube (133), the detection end of the wind speed sensor (16) is inserted into the wind measuring tube (133), the diffuser (14) is set in the air distribution box (132) and close to the air inlet (1321), and each of the air distribution plates (151) is set at intervals in the air distribution box (132).

3. The heat dissipation module testing machine for improving performance testing accuracy according to claim 2, characterized in that: The air equalizer is provided with three air equalizer plates (151), and the air equalizer holes (152) of the three air equalizer plates (151) are staggered.

4. A heat dissipation module testing machine for improving performance testing accuracy according to claim 2, characterized in that: The air distribution holes (152) are honeycomb shaped air distribution holes (152).

5. A heat dissipation module testing machine for improving performance testing accuracy according to claim 2, characterized in that: The diffuser (14) includes a diffuser ball (141) and a fixing rod (142). The fixing rod (142) is fixedly installed on the inner wall of the air distribution box (132). The fixing rod (142) passes through the air inlet (1321). The diffuser ball (141) is fixedly installed in the middle of the fixing rod (142) and close to the air inlet (1321).

6. A heat dissipation module testing machine for improving performance testing accuracy according to any one of claims 2 to 5, characterized in that: The heat dissipation module testing machine includes a frame (2) and multiple testing devices (1). Each testing device (1) is spaced apart on the frame (2). The frame (2) includes a lower housing (22) and an upper housing (21). The upper housing (21) is located at the rear of the lower housing (22). A testing platform (221) is provided on the upper surface of the front part of the lower housing (22). A control cavity (222) and a power cavity (223) are provided inside the lower housing (22). The power cavity (223) is located below the upper housing (21). The fan (11) is fixedly installed in the power cavity (223). The control circuit is located in the control cavity (222). The air distribution box (132) is located in the upper housing (21). The air measuring tube (133) is fixedly installed on the front side of the upper housing (21). The heat source (12) is located on the testing platform (221).

7. A heat dissipation module testing machine for improving performance testing accuracy according to claim 6, characterized in that: The testing device (1) is also provided with a testing fixture (3), which includes a testing base (31) and a sealing cover (32). The testing base (31) is fixedly installed on the testing platform (221), and the heat source (12) is fixedly installed on the testing base (31). The sealing cover (32) is placed on the upper part of the testing base (31). The sealing cover (32) and the testing base (31) enclose a testing cavity (33). The rear end of the sealing cover (32) is connected to the first end of the wind measuring tube (133). A sealing ring is provided between the sealing cover (32) and the wind measuring tube (133). The testing cavity (33) is connected to the wind measuring tube (133).

8. A heat dissipation module testing machine for improving performance testing accuracy according to claim 7, characterized in that: The frame (2) is provided with a fixing device (4) corresponding to the position of each of the test devices (1). The fixing device (4) includes a fixing frame, a fixing slide and a fixing drive mechanism. The fixing frame is fixedly installed on the test platform (221). The fixing slide is slidably installed on the fixing frame. The fixing drive mechanism is connected to the fixing slide in a transmission manner. The fixing slide is located above the heat source (12).

9. A heat dissipation module testing machine for improving performance testing accuracy according to claim 8, characterized in that: The fixed frame includes two guide rods (41) and a fixed seat (42). The lower ends of the two guide rods (41) are fixedly installed on the test platform (221) and located on the left and right sides of the wind measuring tube (133). The left and right sides of the fixed seat (42) are fixedly installed on the upper part of the two guide rods (41). The fixed seat (42) is vertically provided with at least two slide rails (426). The fixed slide is provided with at least two sliders (427). The two sliders (427) are slidably connected to the two slide rails (426). The fixed driving mechanism includes a driving cylinder (43). The driving cylinder (43) is fixedly installed on the upper part of the fixed seat (42). The piston rod of the driving cylinder (43) is connected to the fixed slide.

10. A heat dissipation module testing machine for improving performance testing accuracy according to claim 9, characterized in that: The fixed slide includes a connecting plate (421), an adjusting plate (422), a fixing strip (423), an extension strip (424), and two reinforcing plates (425). The slider (427) is fixedly installed on the rear side of the connecting plate (421), and the adjusting plate (422) is fixedly installed on the front side of the connecting plate (421). The two reinforcing strips are respectively fixedly installed on the left and right ends of the connecting plate (421) and fixedly connected to the adjusting plate (422). The adjusting plate (422) has multiple adjusting and fixing holes (428) spaced apart along the longitudinal direction. The rear end of the fixing strip (423) is fixedly installed on the corresponding adjusting plate by screws. Inside the fixing hole (428), the extension bar (424) is fixedly installed at the front end of the fixing bar (423). The extension bar (424) is provided with an elastic pressing member (44). The elastic pressing member (44) includes a pressing slide bar (441), a rubber pad (442) and a spring (443). The pressing slide bar (441) is slidably installed on the extension bar (424). The rubber pad (442) fixes the lower end of the pressing slide bar (441). The spring (443) is sleeved on the pressing slide bar (441). The upper end of the spring (443) abuts against the extension bar (424) and the lower end abuts against the rubber pad (442).

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