Heat dissipation test fixture of heat dissipation module

Abstract

The utility model discloses a heat dissipation test fixture of a heat dissipation module, which comprises a rack and a laser heating device, the heat dissipation module is arranged on a working table of the rack, and the laser heating device moves along the horizontal direction and the vertical direction under the adjustment of an XZ linear translation table and is opposite to a heat source contact surface of the heat dissipation module. According to the structure, heat source input is accurately controlled through the laser heating device, real heat source working conditions are highly simulated, contact thermal resistance is avoided, and test accuracy is improved; precise positioning of the laser heating device in the horizontal direction and the vertical direction is achieved through the XZ linear translation table, large-range movement stability is ensured in cooperation with a portal frame structure, and the test requirements of heat dissipation modules of different sizes are met. The overall structure enables the test of the heat dissipation module to realize precision control, and meanwhile, high efficiency and high reliability are realized.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation testing technology, and in particular to a heat dissipation testing fixture for a heat dissipation module. Background Technology

[0002] Existing heat dissipation testing fixtures typically use a thermally conductive copper block in direct contact with the heat source surface of the heat dissipation module, with a resistance heating rod or ceramic heating element embedded inside the copper block as the heat source. However, this structure has the following problems: 1. Contact thermal resistance: There is contact thermal resistance between the heat source and the copper block, and between the copper block and the heat dissipation module, resulting in reduced heat transfer efficiency and affecting test accuracy. 2. Temperature measurement error: There is a temperature gradient difference between the area inside the copper block near the heat source and the actual temperature of the contact surface, leading to inaccurate calculation of heat dissipation power. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a heat dissipation testing fixture for a heat dissipation module.

[0004] The technical solution of this utility model is as follows: it includes a frame and a laser heating device. A heat dissipation module is provided on the worktable of the frame. The laser heating device moves in the horizontal and vertical directions under the adjustment of the XZ linear translation stage, and the light-emitting end of the laser heating device is opposite to the heat source contact surface of the heat dissipation module.

[0005] Furthermore: the laser heating device includes: a laser; an optical path transport assembly along the emission optical path of the laser; the optical path transport assembly includes a plurality of collimating mirrors and reflecting mirrors.

[0006] Furthermore, the laser heating device also includes a beam shaping unit: the beam shaping unit includes a beam expander, a homogenizer, and an end reflector, and the laser beam is incident on the heat source contact surface of the heat dissipation module through the end reflector.

[0007] Furthermore, it also includes a control system and an infrared thermometer for real-time monitoring of the temperature of the heat source contact surface, both of which are electrically connected to the control system.

[0008] Furthermore: the XZ linear translation stage is mounted on the machine frame via a gantry frame, including an X-axis translation module arranged in the same direction as the gantry frame beam, and a Z-axis lifting module arranged at the output end of the X-axis translation module. The laser heating device is installed on the output end of the Z-axis lifting module.

[0009] Furthermore: the X-axis translation module includes an X-axis drive motor and an X-axis linear guide rail mounted on the crossbeam. The X-axis linear guide rail extends in the same direction as the crossbeam. Driven by the X-axis drive motor, the laser heating device is slidably connected to the X-axis linear guide rail along with the Z-axis lifting module.

[0010] Furthermore: the Z-axis lifting module includes a Z-axis drive motor with a stroke along the vertical direction and a Z-axis linear guide rail extending along the vertical direction. The laser heating device moves along the vertical direction with the drive stroke of the Z-axis drive motor and is slidably connected to the Z-axis linear guide rail.

[0011] The beneficial technical effects of this utility model are as follows: the laser heating device precisely controls the heat source input, highly simulating the actual heat source working conditions, avoiding contact thermal resistance, and improving test accuracy; the XZ linear translation stage enables precise positioning of the laser heating device in the horizontal and vertical directions, and the gantry structure ensures stability over a wide range of movements, adapting to the testing needs of heat dissipation modules of different sizes; the infrared thermometer monitors the temperature of the heat source contact surface in real time and links with the control system to dynamically adjust the laser power, achieving closed-loop temperature control, avoiding overheating or test deviations, and ensuring data reliability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the relevant structure of the laser heating device of this utility model;

[0014] The components include: 1. rack; 2. heat dissipation module; 3. gantry; 4. X-axis translation module; 5. Z-axis lifting module; 6. optical path transport assembly; and 7. beam shaping unit. Detailed Implementation

[0015] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0016] like Figure 1 and Figure 2 As shown, the heat dissipation testing fixture for a heat dissipation module according to this utility model includes a control system, a frame 1, and a laser heating system disposed above the frame 1. The worktable of the frame 1 is provided with a positioning seat for positioning the heat dissipation module 2. The heat dissipation module 2 has a heat source contact surface. The laser heating system is used to simulate a heat source, and the heat dissipation capacity of the heat dissipation module 2 is tested by heating the heat source contact surface.

[0017] The laser heating system is in contact with the heat source and includes a gantry 3 and a laser heating device mounted on the gantry 3 via an XZ linear translation stage.

[0018] The XZ linear translation stage includes an X-axis translation module 4 arranged in the same direction as the crossbeam of the gantry 3, and a Z-axis lifting module 5 arranged at the output end of the X-axis translation module 4. The laser heating device is installed on the output end of the Z-axis lifting module 5.

[0019] Specifically, the X-axis translation module 4 includes an X-axis drive motor and an X-axis linear guide rail mounted on a crossbeam. The stroke of the X-axis drive motor and the X-axis linear guide rail both extend along the crossbeam direction. The Z-axis lifting module 5 is fixedly connected to the output end of the X-axis drive motor via a sliding part and is slidably connected to the X-axis linear guide rail under the drive of the X-axis drive motor.

[0020] The Z-axis lifting module 5 includes a Z-axis drive motor with a stroke along the vertical direction. The Z-axis drive motor is fixedly connected to the sliding part through a mounting plate. The mounting plate is provided with a Z-axis linear guide rail extending in the vertical direction. The laser heating device moves in the vertical direction with the drive stroke of the Z-axis drive motor and is slidably connected to the Z-axis linear guide rail. At the same time, it moves along the crossbeam direction with the drive stroke of the X-axis drive motor.

[0021] The laser heating device is used to emit and adjust the laser beam to achieve precise heating of the heat source contact surface of the heat dissipation module 2. It includes a laser and a beam shaping unit 7. An optical path transport component 6 is provided along the emission optical path of the laser. The laser is used to emit a laser beam. The optical path transport component 6 includes several collimating mirrors and reflecting mirrors. The collimating mirrors first convert the diverging laser beam into parallel light for subsequent transmission. The reflecting mirrors are used to adjust the optical path more conveniently. The beam shaping unit 7 is used to adjust the spot size and energy distribution of the laser beam to adapt to different heat source contact surface sizes of the heat dissipation module 2 and ensure uniform heating.

[0022] The beam shaping unit 7 includes a beam expander, a homogenizer, and an end reflector. The laser beam is incident on the heat source contact surface of the heat dissipation module 2 through the end reflector.

[0023] The laser heating system also includes an infrared thermometer, which is used to monitor the temperature of the heat source contact surface in real time.

[0024] The X-axis drive motor, Z-axis drive motor, laser, and infrared thermometer are all electrically connected to the control system. The control system controls the XZ linear translation stage to adjust the position of the laser heating device in the horizontal and vertical directions to adapt to heat dissipation modules 2 of different sizes and shapes. The control system combines the signal feedback from the infrared thermometer to precisely adjust the laser power of the laser. Moreover, the laser heating response is fast and the testing efficiency is high.

[0025] Existing heat dissipation test fixtures typically simulate a heat source by having a copper block in contact with the heat source of the heat dissipation module 2, and embedding a resistance heating rod or ceramic heating plate inside the copper block. However, there is contact thermal resistance between the heat source and the copper block, and between the copper block and the heat source contact surface. Some heat is dissipated at the interface due to microscopic gaps or differences in the thermal conductivity of the materials, and cannot be completely transferred to the heat dissipation module 2, resulting in low heat transfer efficiency. Moreover, there is a temperature gradient difference between the area near the heat source inside the copper block and the actual temperature of the contact surface, leading to large errors in the calculation of heat dissipation power.

[0026] This structure completely eliminates contact thermal resistance by using laser heating, resulting in more precise temperature control.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A heat dissipation testing fixture for a heat dissipation module, characterized in that: It includes a frame (1) and a laser heating device. The worktable of the frame (1) is provided with a heat dissipation module (2). The laser heating device moves in the horizontal and vertical directions under the adjustment of the XZ linear translation stage, and the light-emitting end of the laser heating device is opposite to the heat source contact surface of the heat dissipation module (2).

2. The heat dissipation test fixture for a heat dissipation module according to claim 1, characterized in that: The laser heating device includes: a laser; an optical path transport assembly (6) along the emission optical path of the laser; the optical path transport assembly (6) includes a plurality of collimating mirrors and reflecting mirrors.

3. The heat dissipation test fixture for a heat dissipation module according to claim 2, characterized in that: The laser heating device also includes a beam shaping unit: the beam shaping unit (7) includes a beam expander, a homogenizer and an end reflector, and the laser beam is incident on the heat source contact surface of the heat dissipation module (2) through the end reflector.

4. The heat dissipation test fixture for a heat dissipation module according to claim 2, characterized in that: It also includes a control system and an infrared thermometer for real-time monitoring of the temperature of the heat source contact surface, both of which are electrically connected to the control system.

5. The heat dissipation test fixture for a heat dissipation module according to claim 1, characterized in that: The XZ linear translation stage is set above the frame (1) via a gantry (3), including an X-axis translation module (4) arranged in the same direction as the crossbeam of the gantry (3) and a Z-axis lifting module (5) set at the output end of the X-axis translation module (4). The laser heating device is installed on the output end of the Z-axis lifting module (5).

6. The heat dissipation test fixture for a heat dissipation module according to claim 5, characterized in that: The X-axis translation module (4) includes an X-axis drive motor and an X-axis linear guide rail mounted on a crossbeam. The X-axis linear guide rail extends in the same direction as the crossbeam. Driven by the X-axis drive motor, the laser heating device is slidably connected to the X-axis linear guide rail along with the Z-axis lifting module (5).

7. A heat dissipation testing fixture for a heat dissipation module according to claim 5, characterized in that: The Z-axis lifting module (5) includes a Z-axis drive motor with a stroke along the vertical direction and a Z-axis linear guide rail extending along the vertical direction. The laser heating device moves along the vertical direction with the drive stroke of the Z-axis drive motor and is slidably connected to the Z-axis linear guide rail.

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