Heat dissipation pressure head test calibration device

Abstract

The invention provides a heat dissipation pressure head test calibration device, which comprises a shell, and a control assembly and a plurality of groups of test assemblies arranged in the shell, the control assembly comprises a total control panel and a motor control panel, and each group of test assembly comprises a heat dissipation pressure head mounting block, a heating block, a lifting structure, a temperature sensing probe, a display screen and a temperature adjusting knob which are mutually independent; a plurality of test holes in one-to-one correspondence with the heating blocks are formed in the top of the shell, and the heat dissipation pressure head mounting blocks are detachably and correspondingly mounted at the test holes; the lifting structure is arranged in the shell, the heating block is arranged on the lifting structure, the lifting structure is used for driving the heating block to ascend and descend, and the heat dissipation pressing head can abut against the heating block when installed on the heat dissipation pressing head installation block; the temperature sensing probe is arranged on the heating block, and when the heat dissipation pressing head abuts against the heating block, the temperature sensing probe makes contact with the heat dissipation pressing head. The motor control panel, the temperature sensing probe, the heating block, the display screen and the temperature adjusting knob are electrically connected with the main control panel; and the lifting structure is electrically connected with the motor control panel.

Description

Technical Field

[0001] The invention relates to the technical field of chip testing, and in particular to a heat dissipation pressure head testing and calibration device. Background Art

[0002] When we talk about modern technology, chips have become ubiquitous infrastructure. They are widely used in a variety of devices, from the simplest calculator, to high-end supercomputers, to various handheld devices such as mobile phones and tablets. Although chips are small in size, their performance is powerful, thanks to the work of billions of micro transistors inside the chip. However, a lot of heat is generated during the operation of these transistors. If this heat cannot be effectively dissipated, the chip will overheat, resulting in performance degradation or even chip damage.

[0003] In order to prevent these problems, effective chip heat dissipation is required. The basic principle of heat dissipation is to increase the surface area of ​​the chip to improve the heat dissipation efficiency. At the same time, by improving the thermal conductivity of the material of the heat dissipation device, the heat can be more effectively removed from the chip.

[0004] As chip performance improves, traditional heat dissipation technology can no longer meet the demand. In order to better dissipate heat, more advanced heat dissipation technology is needed, such as a liquid cooling system. The liquid cooling system transfers heat to the liquid and then dissipates the heat through the circulation of the liquid. This technology has a very high heat dissipation efficiency, but its manufacturing and maintenance costs are also higher. These undoubtedly increase the cost problem in the design and processing of the chip test socket. Therefore, generally after the design and before the formal processing, thermal simulation will be used to make the heat dissipation effect of the design structure closer to the actual situation.

[0005] However, more and more customers require that the specific effect of heat dissipation, simulation data and actual test data be understood when dissipating heat from the chip, especially for the test of some expensive chips. Because if the heat dissipation effect is not good, it will cause irreversible damage to the expensive chip.

[0006] Therefore, it is necessary to provide a heat dissipation pressure head testing and calibration device to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a heat dissipation head testing and calibration device to achieve the test of the heat dissipation effect of the heat dissipation head used for chip heat dissipation.

[0008] A heat dissipation head test and calibration device provided in an embodiment of the present invention comprises a housing, a control component and a plurality of test components arranged in the housing, wherein the control component comprises a main control board and a motor control board, and each group of the test components comprises a heat dissipation head mounting block, a heating block, a lifting structure, a temperature sensing probe, a display screen and a temperature adjustment knob which are independent of each other; The top of the housing is provided with a plurality of test holes corresponding to the heating blocks one by one, and the heat dissipation head mounting block for mounting the heat dissipation head is annular in structure as a whole, and the heat dissipation head mounting block is detachably mounted at the test holes respectively corresponding to the test holes; The lifting structure is arranged in the housing, the heating block is arranged on the lifting structure, the lifting structure is used to drive the heating block to rise and fall, the test hole allows the heating block to extend from the test hole, so that the heat dissipation head can abut against the heating block when it is installed on the heat dissipation head installation block; The temperature sensing probe is arranged on the heating block, and when the heat dissipation head abuts against the heating block, the temperature sensing probe contacts the heat dissipation head to measure the temperature of the heat dissipation head; The temperature sensing probe, the heating block, the display screen and the temperature adjustment knob are electrically connected to the main control board; the motor control board is electrically connected to the main control board; the lifting structure is electrically connected to the motor control board; During testing, the heat dissipation head is installed on the heat dissipation head mounting block, the lifting structure drives the heating block to rise until it abuts against the heat dissipation head, the temperature adjustment knob is adjusted to set the heating temperature of the heating block, the temperature sensing probe measures the actual temperature of the heat dissipation head and displays it through the display screen, and the heat dissipation effect of the heat dissipation head is calibrated by the heating temperature of the heating block and the actual temperature of the heat dissipation head measured by the temperature sensing probe.

[0009] Preferably, the test components are in three groups, and the three groups of test components are arranged in sequence along the length direction in the shell. The three groups of heat dissipation head mounting blocks are of three different sizes, namely, a small heat dissipation head mounting block, a medium heat dissipation head mounting block and a large heat dissipation head mounting block, which are used to match and install heat dissipation heads of different sizes.

[0010] Preferably, the lifting structure includes a lifting motor, a motor screw, a lifting fastener and a lifting movable part, the lifting fastener is fixed on the lifting motor, the lifting movable part is arranged above the lifting fastener, the heating block is fixed on the top of the lifting movable part, and the lifting motor is connected to the lifting movable part through the motor screw to drive the lifting movable part to drive the heating block to move up and down.

[0011] Preferably, the lifting movable part is provided with fixed columns around, the top of the fixed columns is fixedly connected to the heating block, the fixed columns are provided with guide grooves, the lifting fastener is provided with guide columns matching the guide grooves, and the lifting movable part moves up and down along the guide columns.

[0012] Preferably, a probe mounting hole is provided on the heating block, an insulating mounting column is provided in the probe mounting hole, the temperature sensing probe is provided at the center of the insulating mounting column, and the insulating mounting column blocks the temperature sensing probe and the heating block.

[0013] Preferably, it also includes a power adapter, which supplies power to the control component and the test component; the power adapter is connected to an external power source through an external socket.

[0014] Preferably, the housing includes a front panel, a top cover, a left side panel, a right side panel, a back panel and a bottom panel; the test hole is arranged on the top cover, the display screen and the temperature adjustment knob are arranged on the front panel, the main control panel is arranged on the inner side of the left side panel, and the motor control panel is arranged on the bottom panel.

[0015] Preferably, the control component further includes a power switch, an emergency stop button, a temperature reset button and an indicator light; the temperature reset button and the indicator light are electrically connected to the main control panel.

[0016] Preferably, it also includes a cooling fan and a temperature control module connected to the cooling fan, and the temperature control module is connected to the main control board to control the start and stop of the cooling fan.

[0017] Preferably, a foot pad is provided at the bottom of the shell.

[0018] Compared with the prior art, the technical solution of the embodiment of the present invention has at least the following beneficial effects: The heat dissipation pressure head test and calibration device provided by the present invention is provided with multiple groups of test components, each group of test components includes a mutually independent heat dissipation pressure head mounting block, a heating block, a lifting structure, a temperature sensing probe, a display screen and a temperature adjustment knob; it realizes simultaneous and independent testing of multiple heat dissipation pressure heads, thereby improving the test efficiency; the heating block is driven to rise and fall by the lifting structure, so that the heat dissipation pressure head can abut against the heating block when it is installed on the heat dissipation pressure head mounting block, thereby ensuring close contact between the heating block and the heat dissipation pressure head; the temperature sensing probe is arranged on the heating block, and when the heat dissipation pressure head abuts against the heating block, the temperature sensing probe contacts the heat dissipation pressure head to measure the temperature of the heat dissipation pressure head; the heat dissipation effect of the heat dissipation pressure head is calibrated by the heating temperature of the heating block and the actual temperature of the heat dissipation pressure head measured by the temperature sensing probe, and the test result is accurate and reliable; Furthermore, the heat dissipation head mounting block can be detachably mounted, and the heat dissipation head mounting block has a variety of different outer dimensions, which is used to match and install heat dissipation heads of different sizes, and has a wider range of applications; Furthermore, a cooling fan is provided to effectively adjust the internal temperature of the device to ensure the normal progress of the detection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural schematic diagram of a heat dissipation pressure head testing and calibration device in an embodiment of the present invention; Figure 2 2 is a schematic diagram of a disassembled heat dissipation head test and calibration device according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a lifting structure and a heating block in an embodiment of the present invention; Figure 4 2 is a schematic diagram of the internal structure of the heat dissipation head test and calibration device according to an embodiment of the present invention; Figure 5 is a transverse cross-sectional view of a heat dissipation pressure head testing and calibration device according to an embodiment of the present invention; Figure 6 is a longitudinal cross-sectional view of a heat dissipation pressure head testing and calibration device according to an embodiment of the present invention; Figure 7 2 is a schematic structural diagram of another angle of the heat dissipation pressure head testing and calibration device in an embodiment of the present invention; Figure 8 1 is a test schematic diagram of a heat dissipation pressure head test and calibration device in an embodiment of the present invention.

[0020] Description of reference numerals: 101-top cover; 102-front panel; 103-right side panel; 104-bottom panel; 105-left side panel; 106-back panel; 107-small heat sink mounting block; 108-medium heat sink mounting block; 109-large heat sink mounting block; 110-display screen; 111-power switch; 112-indicator light; 113-temperature reset button; 114-emergency stop button; 115-temperature adjustment knob; 116-foot pad; 201-heating block; 202-lifting motor; 203-lifting fastener; 204-lifting movable part; 205-insulating mounting column; 206-temperature sensing probe; 207-motor screw; 301- main control board; 302- power adapter; 303- cooling fan; 304- temperature control module; 305- motor control board; 306- external socket; 401-Heat dissipation head. DETAILED DESCRIPTION

[0021] In order to make the purpose, features and beneficial effects of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described below are only used to explain the present invention, rather than to limit the present invention. In addition, the same or similar reference numerals may be used in the figures to refer to the same or similar elements in different embodiments, and the description of the same or similar elements in different embodiments and the description of the prior art elements, features, effects, etc. may be omitted.

[0022] The object of the present invention is to provide a heat dissipation head testing and calibration device to achieve the test of the heat dissipation effect of the heat dissipation head used for chip heat dissipation.

[0023] Figure 1 is a structural schematic diagram of a heat dissipation pressure head testing and calibration device in an embodiment of the present invention; Figure 2 2 is a schematic diagram of a disassembled heat dissipation head test and calibration device according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a lifting structure and a heating block in an embodiment of the present invention; Figure 4 2 is a schematic diagram of the internal structure of the heat dissipation head test and calibration device according to an embodiment of the present invention; Figure 5 is a transverse cross-sectional view of a heat dissipation pressure head testing and calibration device according to an embodiment of the present invention; Figure 6 is a longitudinal cross-sectional view of a heat dissipation pressure head testing and calibration device according to an embodiment of the present invention; Figure 7 2 is a schematic structural diagram of another angle of the heat dissipation pressure head testing and calibration device in an embodiment of the present invention; Figure 8 1 is a test schematic diagram of a heat dissipation pressure head test and calibration device in an embodiment of the present invention.

[0024] View now Figures 1 to 8 , a heat dissipation head test and calibration device provided by an embodiment of the present invention comprises a housing, a control component and a plurality of test components arranged in the housing, the control component comprises a main control board 301 and a motor control board 305, each test component comprises a small heat dissipation head mounting block 107, a medium heat dissipation head mounting block 108 and a large heat dissipation head mounting block 109, a heating block 201, a lifting structure, a temperature sensing probe 206, a display screen 110 and a temperature adjustment knob 115 which are independent of each other; The top of the housing is provided with a plurality of test holes corresponding to the heating block 201 one by one, and the small heat dissipation head mounting block 107, the medium heat dissipation head mounting block 108 and the large heat dissipation head mounting block 109 for mounting the heat dissipation head 401 are in an annular structure as a whole, and the small heat dissipation head mounting block 107, the medium heat dissipation head mounting block 108 and the large heat dissipation head mounting block 109 are detachably mounted at the test holes respectively corresponding to each other; The lifting structure is arranged in the housing, and the heating block 201 is arranged on the lifting structure. The lifting structure is used to drive the heating block 201 to rise and fall. The test hole allows the heating block 201 to extend from the test hole, so that the heat dissipation head 401 can abut against the heating block 201 when it is installed on the small heat dissipation head mounting block 107, the medium heat dissipation head mounting block 108 or the large heat dissipation head mounting block 109; The temperature sensing probe 206 is disposed on the heating block 201. When the heat dissipation head 401 abuts against the heating block 201, the temperature sensing probe 206 contacts the heat dissipation head 401 to measure the temperature of the heat dissipation head 401. The temperature sensing probe 206, the heating block 201, the display screen 110 and the temperature adjustment knob 115 are electrically connected to the main control board 301; the motor control board 305 is electrically connected to the main control board 301; the lifting structure is electrically connected to the motor control board 305; During the test, the heat sink 401 is installed on the small heat sink mounting block 107, the medium heat sink mounting block 108 or the large heat sink mounting block 109, and the lifting structure drives the heating block 201 to rise until it abuts against the heat sink 401. The temperature adjustment knob 115 is adjusted to set the heating temperature of the heating block 201. The temperature sensing probe 206 measures the actual temperature of the heat sink 401 and displays it through the display screen 110. The heat dissipation effect of the heat sink 401 is calibrated by the heating temperature of the heating block 201 and the actual temperature of the heat sink 401 measured by the temperature sensing probe 206.

[0025] In some embodiments, the test components are divided into three groups, and the three groups of test components are arranged in sequence along the length direction in the shell. The three groups of test components respectively include a small heat dissipation pressure head mounting block 107, a medium heat dissipation pressure head mounting block 108 and a large heat dissipation pressure head mounting block 109. The small heat dissipation pressure head mounting block 107, the medium heat dissipation pressure head mounting block 108 and the large heat dissipation pressure head mounting block 109 are three types with different outer sizes, which are used to match and install heat dissipation pressure heads 401 of different sizes.

[0026] In some embodiments, the lifting structure includes a lifting motor 202, a motor screw 207, a lifting fastener 203 and a lifting movable part 204. The lifting fastener 203 is fixed on the lifting motor 202, the lifting movable part 204 is arranged above the lifting fastener 203, the heating block 201 is fixed on the top of the lifting movable part 204, and the lifting motor 202 is connected to the lifting movable part 204 through the motor screw 207 to drive the lifting movable part 204 to drive the heating block 201 to move up and down.

[0027] In some embodiments, the lifting movable part 204 is surrounded by fixed columns, the top of the fixed columns are fixedly connected to the heating block 201, the fixed columns are provided with guide grooves, and the lifting fastener 203 is provided with guide columns matching the guide grooves. The lifting movable part 204 moves up and down along the guide columns to ensure the smooth lifting and lowering of the heating block 201.

[0028] In some embodiments, a probe mounting hole is provided on the heating block 201, an insulating mounting column 205 is provided in the probe mounting hole, the temperature sensing probe 206 is provided at the center of the insulating mounting column 205, and the insulating mounting column 205 blocks the temperature sensing probe 206 and the heating block 201; the insulating mounting column 205 is made of insulating rubber, and the insulating mounting column 205 is used to isolate the temperature of the heating block 201 from the temperature sensing probe 206, and at the same time, the temperature data of the contact position is measured.

[0029] In some embodiments, the housing includes a front panel 102, a top cover 101, a left side panel 105, a right side panel 103, a back panel 106 and a bottom panel 104; a test hole is arranged on the top cover 101, a display screen 110 and a temperature adjustment knob 115 are arranged on the front panel 102, and a motor control board 305 is arranged on the bottom panel 104.

[0030] In some embodiments, a power adapter 302 is also included, which supplies power to the control component and the test component; the power adapter 302 is connected to an external power source via an external socket 306, the power adapter 302 is arranged on the bottom plate 104 close to the right side plate 103, and the external socket 306 is arranged on the right side plate 103; the main control board 301 is arranged on the inner side of the left side plate 105 to stay away from the power adapter 302 to prevent damage caused by excessive heat.

[0031] In some embodiments, the control component also includes a power switch 111, an emergency stop button 114, a temperature reset button 113 and an indicator light 112. The power switch 111, the emergency stop button 114, the temperature reset button 113 and the indicator light 112 are all arranged on the front panel 102; the temperature reset button 113 and the indicator light 112 are electrically connected to the main control board 301; the temperature reset button 113 is used to return the device to its initial state after the test is stable and completed, and there is no need to adjust the temperature adjustment knob 113 to prevent reverse or misoperation from causing sudden heating or data errors; the emergency stop button 114 is used to turn off the power of the device when an equipment failure occurs or an emergency is caused by human factors, which is safer.

[0032] In some embodiments, it also includes a cooling fan 303 and a temperature control module 304 connected to the cooling fan 303, the temperature control module 304 is connected to the main control board 301 to control the start and stop of the cooling fan 303; the cooling fan 303 is arranged on the back plate 106, the temperature control module 304 is arranged on the bottom plate 104, and an air inlet is arranged on the back plate 106 corresponding to the cooling fan 303.

[0033] In some embodiments, a foot pad 116 is provided at the bottom of the housing to facilitate stable placement of the device.

[0034] See also Figure 8 In a specific implementation, the heat sink 401 to be tested is fixed on a suitable small heat sink mounting block 107, a medium heat sink mounting block 108 or a large heat sink mounting block 109; the external socket 306 is connected to the power supply, and the power switch 111 is pressed to start the device; at this time, the indicator light 112 shows green, and the temperature adjustment knob 115 is rotated. At this time, the lifting motor 202 moves up to drive the heating block 201 to move up, and fits tightly with the heat sink 401. The temperature adjustment knob 115 is rotated to the temperature value to be tested, and the display screen 110 displays the temperature rise curve and temperature data. When the device is stable for a period of time, the data is recorded, the test is completed, and the temperature reset button 113 is pressed to restore the device to its initial state.

[0035] In summary, the heat dissipation head test and calibration device provided by the present invention is provided with multiple test components, each of which includes a small heat dissipation head mounting block 107, a medium heat dissipation head mounting block 108, and a plurality of test components. and a large heat dissipation head mounting block 109, a heating block 201, a lifting structure, a temperature sensing probe 206, a display screen 110 and a temperature adjustment knob 115; realize independent testing of multiple heat dissipation heads 401 at the same time, and improve the test efficiency; the heating block 201 is driven to rise and fall by the lifting structure, so that the heat dissipation head 401 can be abutted against the heating block 201 when it is installed on the small heat dissipation head mounting block 107, the medium heat dissipation head mounting block 108 or the large heat dissipation head mounting block 109, to ensure the close contact between the heating block 201 and the heat dissipation head 401, the temperature sensing probe 206 is arranged on the heating block 201, and when the heat dissipation head 401 abuts against the heating block 201, the temperature sensing probe 206 contacts the heat dissipation head 401 to measure the temperature of the heat dissipation head 401; the heat dissipation effect of the heat dissipation head 401 is calibrated by the heating temperature of the heating block 201 and the actual temperature of the heat dissipation head 401 measured by the temperature sensing probe 206, and the test result is accurate and reliable; Further, the small heat dissipation head mounting block 107, the medium heat dissipation head mounting block 108 and the large heat dissipation head mounting block 109 are detachably mounted, and the small heat dissipation head mounting block 107, the medium heat dissipation head mounting block 108 and the large heat dissipation head mounting block 109 are of different sizes, and are used to match and install heat dissipation heads 401 of different sizes, and have a wider range of applications; Furthermore, a cooling fan 303 is provided to effectively adjust the internal temperature of the device and ensure the normal progress of the detection work.

[0036] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative rather than limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claim, based on actual needs and where technically feasible, and may be derived from the technical features of the corresponding independent claim in any appropriate manner rather than simply through the specific combination listed in the claims.

[0037] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A heat dissipation head test and calibration device, It is characterized in that It includes a housing and a control component and a plurality of test components arranged in the housing, wherein the control component includes a main control panel and a motor control panel, and each group of the test components includes a heat dissipation head mounting block, a heating block, a lifting structure, a temperature sensing probe, a display screen and a temperature adjustment knob that are independent of each other; The top of the housing is provided with a plurality of test holes corresponding to the heating blocks one by one, and the heat dissipation head mounting block for mounting the heat dissipation head is annular in structure as a whole, and the heat dissipation head mounting block is detachably mounted at the test holes respectively corresponding to the test holes; The lifting structure is arranged in the housing, the heating block is arranged on the lifting structure, the lifting structure is used to drive the heating block to rise and fall, the test hole allows the heating block to extend from the test hole, so that the heat dissipation head can abut against the heating block when it is installed on the heat dissipation head installation block; The temperature sensing probe is arranged on the heating block, and when the heat dissipation head abuts against the heating block, the temperature sensing probe contacts the heat dissipation head to measure the temperature of the heat dissipation head; The temperature sensing probe, the heating block, the display screen and the temperature adjustment knob are electrically connected to the main control board; the motor control board is electrically connected to the main control board; the lifting structure is electrically connected to the motor control board; During testing, the heat dissipation head is installed on the heat dissipation head mounting block, the lifting structure drives the heating block to rise until it abuts against the heat dissipation head, the temperature adjustment knob is adjusted to set the heating temperature of the heating block, the temperature sensing probe measures the actual temperature of the heat dissipation head and displays it through the display screen, and the heat dissipation effect of the heat dissipation head is calibrated by the heating temperature of the heating block and the actual temperature of the heat dissipation head measured by the temperature sensing probe.

2. The heat dissipation head test and calibration device according to claim 1, It is characterized in that There are three groups of test components, which are arranged in sequence along the length direction in the shell. The three groups of heat dissipation head mounting blocks are of three different sizes, namely, a small heat dissipation head mounting block, a medium heat dissipation head mounting block and a large heat dissipation head mounting block, which are used to match and install heat dissipation heads of different sizes.

3. The heat dissipation head test and calibration device according to claim 1, It is characterized in that The lifting structure includes a lifting motor, a motor screw, a lifting fastener and a lifting movable part. The lifting fastener is fixed on the lifting motor, the lifting movable part is arranged above the lifting fastener, the heating block is fixed on the top of the lifting movable part, and the lifting motor is connected to the lifting movable part through the motor screw to drive the lifting movable part to drive the heating block to move up and down.

4. The heat dissipation head test and calibration device according to claim 3, It is characterized in that The lifting movable part is provided with fixed columns around, the top of the fixed columns is fixedly connected to the heating block, the fixed columns are provided with guide grooves, the lifting fastener is provided with guide columns matching the guide grooves, and the lifting movable part moves up and down along the guide columns.

5. The heat dissipation head test and calibration device according to claim 1, It is characterized in that The heating block is provided with a probe mounting hole, an insulating mounting column is provided in the probe mounting hole, the temperature sensing probe is arranged at the center of the insulating mounting column, and the insulating mounting column blocks the temperature sensing probe and the heating block.

6. The heat dissipation head test and calibration device according to claim 1, It is characterized in that It also includes a power adapter, which supplies power to the control component and the test component; the power adapter is connected to an external power source through an external socket.

7. The heat dissipation head test and calibration device according to claim 1, It is characterized in that The shell includes a front panel, a top cover, a left side panel, a right side panel, a back panel and a bottom panel; the test hole is arranged on the top cover, the display screen and the temperature adjustment knob are arranged on the front panel, the main control panel is arranged on the inner side of the left side panel, and the motor control panel is arranged on the bottom panel.

8. The heat dissipation head test and calibration device according to claim 1, It is characterized in that The control component also includes a power switch, an emergency stop button, a temperature reset button and an indicator light; the temperature reset button and the indicator light are electrically connected to the main control panel.

9. The heat dissipation head test and calibration device according to claim 1, It is characterized in that It also includes a cooling fan and a temperature control module connected to the cooling fan, and the temperature control module is connected to the main control board to control the start and stop of the cooling fan.

10. The heat dissipation head test and calibration device according to claim 1, It is characterized in that A foot pad is arranged at the bottom of the shell.

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