CN220472985U

CN220472985U - Thermal resistance testing device of electronic radiator

Info

Publication number: CN220472985U
Application number: CN202322093153.2U
Authority: CN
Inventors: 刘树高; 张绪吉; 吴明成
Original assignee: Shandong Kaiyuan Electronic Co Ltd
Current assignee: Shandong Kaiyuan Electronic Co Ltd
Priority date: 2023-08-05
Filing date: 2023-08-05
Publication date: 2024-02-09
Anticipated expiration: 2033-08-05

Abstract

The utility model discloses a thermal resistance testing device of an electronic radiator, which comprises a base, wherein an electric-heat conducting radiator is arranged on the base, a first thermocouple is embedded in the radiator, a direct-current heating source close to the first thermocouple is arranged on the radiator, an output line of the first thermocouple is connected with a terminal computer of a thermal resistance tester, an input line of the direct-current heating source is connected with a detection line of a power meter, and an output flat cable of the power meter is connected with the terminal computer of the thermal resistance tester; the base is provided with a second thermocouple for detecting the temperature of the test environment, an output line of the second thermocouple is connected with a terminal computer of the thermal resistance tester, a first thermocouple installation hole is formed in the surface of the radiator, the first thermocouple is located in the first thermocouple installation hole and is in contact with the inner wall of the first thermocouple installation hole, and the top of the first thermocouple is connected with the surface of the radiator through an insulating adhesive layer. The utility model has the characteristics that the first thermocouple is convenient to disassemble and assemble, and the first thermocouple is not damaged during disassembly.

Description

Thermal resistance testing device of electronic radiator

Technical Field

The utility model relates to the technical field of thermal resistance testing of electronic radiators, in particular to a thermal resistance testing device of an electronic radiator.

Background

The electronic radiator is widely applied to electronic equipment and measuring instruments, a large amount of heat is generated when the equipment works, and if the excessive heat cannot be quickly dissipated, high temperature is generated, and an electronic element which is in operation is likely to be destroyed. The heat dissipation effect of the electronic radiator has a direct relation with the heat resistance, and under the same environmental condition, the smaller the heat resistance is, the better the heat dissipation effect is, so that effective measurement, management and control adjustment are required for the heat resistance of the electronic radiator. The measurement of the thermal resistance of the electronic radiator needs to measure parameters such as the surface temperature Tfa, the ambient temperature Ta, the thermal power and the like of the radiator at the heating element respectively, and the parameters are calculated respectively to obtain a test result after calculation. In the measuring process, it is critical to measure the temperature of the surface of the radiator at the heating element, usually, a small hole is drilled on the surface of the radiator as close to the heating element as possible to place the thermocouple into the hole, then the radiator material around the thermocouple is riveted, so that the thermocouple is embedded in the surface of the radiator and then the measurement is performed.

Disclosure of Invention

The utility model provides the thermal resistance testing device of the electronic radiator, which is convenient for taking out the thermocouple from the radiator and does not damage the thermocouple, in order to solve the problem that the thermocouple embedded in the radiator is difficult to take out in the testing device of the electronic radiator.

In order to solve the technical problems, the utility model comprises a base, wherein an electric-heat conducting radiator is arranged on the base, a first thermocouple is embedded in the radiator, a direct-current heating source close to the first thermocouple is arranged on the radiator, an output line of the first thermocouple is connected with a terminal computer of a thermal resistance tester, an input line of the direct-current heating source is connected with a detection line of a power meter, and an output flat cable of the power meter is connected with the terminal computer of the thermal resistance tester; the base is provided with a second thermocouple for detecting the temperature of the test environment, and an output line of the second thermocouple is connected with a terminal computer of the thermal resistance tester, and the structure is characterized in that: the radiator is characterized in that a first thermocouple installation hole is formed in the surface of the radiator, the first thermocouple is located in the first thermocouple installation hole, the outer wall of the first thermocouple is in contact with the inner wall of the first thermocouple installation hole, the top of the first thermocouple is connected with the surface of the radiator through an insulating adhesive layer, and the insulating adhesive layer can be bonded with the first thermocouple and the base body of the radiator and can be separated.

After the structure is adopted, the radiator is provided with the first thermocouple mounting hole, the first thermocouple is placed in the first thermocouple mounting hole, the outer wall of the first thermocouple is contacted with the inner wall of the first thermocouple mounting hole, the top of the first thermocouple is coated with glue or filled with glue to form an insulating glue layer, and the insulating glue layer is simultaneously bonded with the surface of the radiator, so that the first thermocouple is fixed in the first thermocouple mounting hole, and the radiator is stable and reliable in installation and well contacted with the radiator; one end of the direct current heat generating source is arranged on the radiator close to the first thermocouple. The first thermocouple inputs temperature information of the contact part of the direct-current heating source and the radiator to the terminal computer of the thermal resistance tester, the second thermocouple inputs the temperature of the testing environment to the terminal computer of the thermal resistance tester, and the power meter inputs parameter information such as current, voltage, power and the like of the direct-current heating source to the terminal computer of the thermal resistance tester. When testing, the direct current heating source is electrified, and after each temperature value is stable, the terminal computer of the thermal resistance tester automatically stores and records the measurement result, thus completing the thermal resistance test of the electronic radiator. After the test is finished, the edge of the insulating adhesive layer is separated from the surface of the radiator, then the first thermocouple is taken out, the insulating adhesive layer is separated from the first thermocouple, the first thermocouple can be taken out from the radiator without using large external force, the operation is convenient, the first thermocouple cannot be damaged, and the installation and the disassembly of the first thermocouple are convenient.

Further, the base is a conductive base body, and a plurality of carbon rod supporting columns which support the bottom of the radiator and are adjustable in height are arranged on the base; the base is provided with a plurality of pressing piece mechanisms which are extruded on the upper surface of the radiator and are adjustable in height, and the pressing piece mechanisms are contacted with the radiator through heat-insulating presser feet.

Still further, be equipped with terminal and battery case on the base, terminal and base contact, the negative pole of battery case passes through first wire and is connected with the terminal, the anodal of battery case passes through the second wire and is connected with the pilot lamp, the pilot lamp passes through the third wire and is connected with normally open switch's one end, normally open switch's the other end passes through a fourth wire and is connected with an output line of first thermocouple.

Further, the first thermocouple and the direct current heating source are arranged on the upper surface of the radiator.

Furthermore, a shell surrounding the radiator and the second thermocouple is arranged on the base, a fan for adjusting the temperature of the testing environment inside the shell is arranged on the side face of the shell, and one side of the shell opposite to the fan is opened.

Further, an observation hole and a transparent cover plate capable of covering the observation hole are arranged on the top surface of the shell.

Further, the fan is a speed-adjustable fan with adjustable rotating speed.

According to the electronic radiator thermal resistance testing device, the first thermocouple is placed in the first thermocouple mounting hole, the insulating adhesive layer bonds the top of the first thermocouple with the surface of the radiator to fix the first thermocouple, the first thermocouple is stable and reliable to mount, well contacts with the radiator, is convenient to mount and dismount, and does not damage the first thermocouple during dismantlement; the loop formed by the first thermocouple, the carbon rod supporting column, the base, the binding post, the battery box, the indicator light and the normally open switch can detect whether the first thermocouple is in good contact with the first thermocouple mounting hole or not, so that the accuracy of temperature detection at the contact position of the radiator and the direct-current heating source by the first thermocouple is improved, the temperature in the shell is regulated by the fan, the testing environment temperature is identical with the working temperature of the radiator, and the accuracy and reliability of thermal resistance testing data are improved. The device is convenient to operate, the first thermocouple is stable and reliable to install and cannot be damaged during disassembly, and the device has the characteristic of accurate and reliable test data.

Drawings

FIG. 1 is a schematic diagram of a thermal resistance testing apparatus for an electronic heat sink according to the present utility model;

FIG. 2 is an installation diagram of a heat sink during glue filling and testing;

FIG. 3 is an enlarged view of part A of FIG. 1;

in the figure: 11-a base; 12-carbon rod supporting columns; 13-a press mechanism; 131-insulating presser feet; 14-a housing; 141-a viewing port; 15-a transparent cover plate; 151-axis; 21-a glue nozzle; 22-glue filling machine; 23-a manipulator; 31-a battery case; 32-binding posts; 321-a first wire; 33-normally open switch; 331-fourth wire; 34-indicator lights; 341-a second wire; 342-third wire; 41-a first thermocouple; 411-first thermocouple output line one; 412-a first thermocouple output line two; 42-a second thermocouple; 421-second thermocouple output line one; 422-second thermocouple output line two; 43-direct current heat source; 431-a direct-current heating source input line I; 432-a direct-current heating source input line II; 44-a power meter; 441-output flat cable; 45-speed-adjustable fans; 5-a heat sink; 51—a first thermocouple mounting hole; 6-a terminal computer of the thermal resistance tester.

Detailed Description

Referring to fig. 1-3, an electronic radiator thermal resistance testing device comprises an aluminum alloy base 11, wherein a plurality of carbon rod supporting columns 12 are arranged on the base 11, the carbon rod supporting columns 12 are in threaded connection with the base 11, and the height is adjustable. The radiator 5 is placed on the carbon rod supporting column 12, the radiator 5 is made of aluminum alloy or copper with good electric conduction and heat conduction, two pressing piece mechanisms 13 with adjustable heights are arranged on the base 11, the pressing piece mechanisms 13 are positioned on two sides of the radiator 5, the upper surface of the radiator 5 is pressed downwards from different positions to fix the radiator 5, the number of the pressing piece mechanisms 13 can be adjusted according to the size of the radiator 5, the radiator 5 is pressed and fixed, and the heat insulation presser feet 131 are arranged at the contact parts of the pressing piece mechanisms 13 and the radiator 5; the height-adjustable carbon rod support column 12 and the pressing part mechanism 13 enable the testing device to be suitable for radiators 5 of different specifications. As shown in fig. 2, the upper surface (i.e., the temperature measuring surface) of the heat sink 5 is provided with a first thermocouple installation hole 51, the first thermocouple 41 is placed in the first thermocouple installation hole 51, the outer wall of the first thermocouple 41 contacts with the inner wall of the first thermocouple installation hole 51, the top of the first thermocouple 41 is connected with the surface of the heat sink 5 through an insulating adhesive layer (not shown in the figure), the insulating adhesive layer can be adhered to the first thermocouple 41 and the substrate of the heat sink 5 and also can be separated, the first thermocouple output line 411 and the second thermocouple output line 412 of the first thermocouple 41 are connected with the thermal resistance tester terminal computer 6, and the first thermocouple 41 can be embedded on other side surfaces of the heat sink 5 according to different forms of the heat sink. The radiator 5 is provided with a fixed direct current heat source 43, one end of the direct current heat source 43 is close to the first thermocouple 41, a direct current heat source input line one 431 and a direct current heat source input line two 432 of the direct current heat source 43 are connected with a detection line of the power meter 44 according to a wiring method of the power meter 44, and an output flat cable 441 of the power meter 44 is connected with the thermal resistance tester terminal computer 6. The base 11 is provided with a second thermocouple 42, the second thermocouple 42 is supported and fixed through a bracket fixed on the base 11, and a first second thermocouple output line 421 and a second thermocouple output line 422 of the second thermocouple 42 are connected with the thermal resistance tester terminal computer 6. The base 11 is provided with a fixed binding post 32, the binding post 32 is a copper binding post, the binding post 32 is in contact with the base 11, a battery box 31 is arranged on the base 11, a negative electrode of the battery box 31 is connected with the binding post 32 through a first lead 321, a positive electrode of the battery box 31 is connected with an indicator lamp 34 through a second lead 341, the indicator lamp 34 is connected with one end of a normally open switch 33 through a third lead 342, the other end of the normally open switch 33 is connected with a first thermocouple output line 411 through a fourth lead 331, and the normally open switch 33 adopts a normally open button switch. The base 11 is provided with a shell 14, the shell 14 surrounds the radiator 5 and the second thermocouple 42 in the shell 14, and the carbon rod support column 12, the pressing mechanism 13 and the first thermocouple 41 are in direct contact with the radiator 5, so that the components are also in the shell 14. The casing 14 is provided with a speed regulating fan 45 arranged near the rear of the radiator 5 (hereinafter referred to as the side of the speed regulating fan 45 near the radiator 5), the second thermocouple 42 is arranged in the area between the speed regulating fan 45 and the rear of the radiator 5, the second thermocouple 42 is used for detecting the temperature of the thermal resistance testing environment, and the second thermocouple 42 can also be arranged at other positions in the casing 14; the speed adjusting fan 45 is exhausted from the casing 14, and it is needless to say that the speed adjusting fan 45 may be provided to blow air to the heat radiating teeth of the heat sink 5 to adjust the temperature of the test environment, and the front face of the casing 14 (i.e., the side face opposite to the speed adjusting fan 45) is opened. The top surface of the shell 14 is provided with an observation hole 141, the shell 14 is provided with a transparent cover plate 15 which can rotate along the shaft 151 to the upper side of the observation hole 141 and cover the observation hole 141, the inside condition of the shell 14 can be observed conveniently, and the transparent cover plate 15 can be rotated away to perform other operations.

The installation and working processes are as follows: the first thermocouple installation hole 51 capable of just accommodating the first thermocouple 41 is prefabricated on the upper surface of the heat sink 5, and the first thermocouple installation hole 51 is adapted to the shape of the first thermocouple 41, however, the first thermocouple installation hole 51 may be prefabricated according to practical situations, but the bottom and one side of the first thermocouple 41 are guaranteed to be capable of being attached to the inner wall of the first thermocouple installation hole 51. The radiator 5 is placed on the carbon rod supporting column 12, the height of the carbon rod supporting column 12 is adjusted to form stable support for the radiator 5, and the height of the pressing element mechanism 13 is adjusted to enable the pressing element mechanism 13 to press the radiator 5 from above, so that the radiator 5 is fixed. The wire protective sleeve of the first thermocouple 41 is held by tweezers, the first thermocouple 41 is placed in the first thermocouple installation hole 51, the outer wall of the first thermocouple 41 is attached to the bottom and one side of the first thermocouple installation hole 51, and the first thermocouple 41 is in good contact with the heat sink 5. As shown in fig. 2, the glue filling machine 22 is clamped by the manipulator 23, the glue nozzle 21 of the glue filling machine 22 is aligned to the top of the first thermocouple 41 to perform glue filling fixation, glue solution is insulating and can be adhered to the radiator 5 and the matrix of the first thermocouple 41, the glue solution is fast to solidify, an insulating glue layer is formed after the glue solution is solidified, the insulating glue layer can be separated from the radiator 5 and the matrix of the first thermocouple 41, and the insulating glue layer can be directly glued in the connecting area of the radiator 5 and the first thermocouple 41 without the manipulator 23 and the glue filling machine 22. The negative electrode of the battery case 31 is connected to the post 32 by a first lead 321, the positive electrode of the battery case 31 is connected to the indicator lamp 34 by a second lead 341, the indicator lamp 34 is connected to one end of the normally open switch 33 by a third lead 342, the other end of the normally open switch 33 is connected to one output line of the first thermocouple 41 by a fourth lead 331, and the fourth lead 331 is connected to the first thermocouple output line 411 in fig. 1. Detecting whether the first thermocouple 41 is in good contact with the radiator 5 or not, pressing the normally open switch 33, enabling current to pass through the indicator lamp 34 through the second lead 341, and forming a loop through the third lead 342, the normally open switch 33, the fourth lead 331, the first thermocouple output line 411, the first thermocouple 41, the radiator 5, the carbon rod support column 12, the base 11, the binding post 32 and the first lead 321, wherein if the indicator lamp 34 is on, the fact that the first thermocouple 41 is in good contact with the radiator 5 is indicated, and the temperature data measured by the first thermocouple 41 are accurate; if the indicator lamp 34 is not on, it indicates that the contact between the first thermocouple 41 and the radiator 5 is poor, the temperature data measured by the first thermocouple 41 will have larger error, the insulating adhesive layer needs to be separated from the radiator 5 along the edge of the insulating adhesive layer, the first thermocouple 41 is taken out, the insulating adhesive layer is removed from the first thermocouple 41, the glue in the first thermocouple mounting hole 51 is removed completely, the first thermocouple 41 is placed in the first thermocouple mounting hole 51 for re-filling, the normally open switch 33 is pressed for detection again until the indicator lamp 34 is on, and then the glue filling machine 22 is removed. One end of the direct current heat source 43 is fixed on the radiator 5 close to the first thermocouple 41, a detection line of the power meter 44 is connected to a direct current heat source input line one 431 and a direct current heat source input line two 432 of the direct current heat source 43 according to a wiring method of the power meter 44, an output flat cable 441 of the power meter 43 is connected to the thermal resistance tester terminal computer 6, and a first thermocouple output line one 411 and a first thermocouple output line two 412 of the first thermocouple 41 are connected to the thermal resistance tester terminal computer 6; the temperature probe second thermocouple 42 for detecting the temperature of the test environment is supported by a bracket fixed on the base 11 at an intermediate position at a certain distance from the rear of the radiator 5, and the first thermocouple output line 421 and the second thermocouple output line 422 of the second thermocouple 42 are connected to the terminal computer 6 of the thermal resistance tester. Then, the upper shell 14 is installed, one side of the shell 14 provided with the speed regulating fan 45 is close to the rear of the radiator 5, the second thermocouple 42 is positioned between the rear of the radiator 5 and the speed regulating fan 45, one side of the shell 14 opposite to the speed regulating fan 45 is open, the speed regulating fan 45 can adjust the thermal resistance test environment temperature of the radiator 5 in the shell, the test environment temperature is the same as the working environment temperature of the radiator 5, and the accuracy of thermal resistance test data is improved. The thermal resistance tester terminal computer 6 is started, the direct current heating source input line one 431 and the direct current heating source input line two 432 of the direct current heating source 43 are connected with an external direct current power supply, the direct current heating source 43 heats, the power meter 44 inputs parameter information such as current, voltage and power of the direct current heating source 43 into the thermal resistance tester terminal computer 6 through the output flat wire 441, temperature information of a contact position of the direct current heating source 43 and the radiator 5 is input into the thermal resistance tester terminal computer 6 through the first thermocouple output line one 411 and the first thermocouple output line two 412 of the first thermocouple 41, testing environment temperature information is input into the thermal resistance tester terminal computer 6 through the second thermocouple output line one 421 and the second thermocouple output line two 422 of the second thermocouple 42, thermal resistance testing is started, and after each temperature value is stable, the thermal resistance tester terminal computer 6 automatically stores and records a measuring result, and the thermal resistance testing of the radiator 5 is completed. After the thermal resistance test, the heat sink 5 can be optimally designed according to the comparison data so as to improve the heat dissipation performance of the heat sink 5.

According to the electronic radiator thermal resistance testing device, the first thermocouple is connected to the radiator through the insulating adhesive layer, so that the electronic radiator thermal resistance testing device is convenient to install and detach, the first thermocouple can be detached without using large external force when being detached, the first thermocouple cannot be damaged, a loop for detecting whether the first thermocouple is in good contact with the radiator is further arranged, the first thermocouple is guaranteed to be in good contact with the radiator, and the accuracy of the temperature of the contact position of the direct current heating source detected by the first thermocouple and the radiator is further improved; the temperature of the thermal resistance testing environment in the adjusting shell body of the speed adjusting fan is the same as the working temperature of the radiator, and the temperature of the contact part of the radiator and the heating electronic element and the temperature of the testing environment can be accurately detected by the device, so that the accuracy and the reliability of the thermal resistance testing are improved. The utility model has the characteristics of convenient disassembly and assembly of the first thermocouple, no damage to the first thermocouple, accurate and reliable test data and convenient operation.

Claims

1. The utility model provides an electronic radiator thermal resistance testing arrangement, includes base (11), be equipped with electrically conductive radiator (5) on base (11), be embedded with first thermocouple (41) on radiator (5), be equipped with on radiator (5) and be close to direct current heating source (43) that first thermocouple (41) set up, the output line of first thermocouple (41) is connected with thermal resistance tester terminal computer (6), the input line of direct current heating source (43) is connected with the detection line of power meter (44), the output winding displacement (441) of power meter (44) are connected with thermal resistance tester terminal computer (6); be equipped with on base (11) and be used for detecting test environment temperature's second thermocouple (42), the output line of second thermocouple (42) is connected characterized by with thermal resistance tester terminal computer (6): the radiator is characterized in that a first thermocouple installation hole (51) is formed in the surface of the radiator (5), the first thermocouple (41) is located in the first thermocouple installation hole (51), the outer wall of the first thermocouple (41) is in contact with the inner wall of the first thermocouple installation hole (51), the top of the first thermocouple (41) is connected with the surface of the radiator (5) through an insulating adhesive layer, and the insulating adhesive layer can be adhered to and separated from the first thermocouple (41) and the base body of the radiator (5).

2. The electronic heat sink thermal resistance testing apparatus of claim 1, wherein: the base (11) is a conductive base body, and a plurality of carbon rod supporting columns (12) which are used for supporting the bottom of the radiator (5) and are adjustable in height are arranged on the base (11); the base (11) is provided with a plurality of pressing piece mechanisms (13) which are pressed on the upper surface of the radiator (5) and are adjustable in height, and the pressing piece mechanisms (13) are contacted with the radiator (5) through heat-insulating presser feet (131).

3. The electronic heat sink thermal resistance testing apparatus of claim 2, wherein: be equipped with terminal (32) and battery case (31) on base (11), terminal (32) and base (11) contact, the negative pole of battery case (31) is connected with terminal (32) through first wire (321), the positive pole of battery case (31) is connected with pilot lamp (34) through second wire (341), pilot lamp (34) are connected with one end of normally open switch (33) through third wire (342), the other end of normally open switch (33) is connected with one output line of first thermocouple (41) through fourth wire (331).

4. A thermal resistance testing apparatus of an electronic heat sink according to claim 3, wherein: the first thermocouple (41) and the direct current heat generating source (43) are arranged on the upper surface of the radiator (5).

5. The device for testing thermal resistance of an electronic heat sink according to claim 4, wherein: the base (11) is provided with a shell (14) which surrounds the radiator (5) and the second thermocouple (42), the side surface of the shell (14) is provided with a fan which adjusts the temperature of the test environment inside the shell (14), and one side of the shell (14) which is opposite to the fan is open.

6. The device for testing thermal resistance of an electronic heat sink according to claim 5, wherein: the top surface of the shell (14) is provided with an observation hole (141) and a transparent cover plate (15) which can cover the observation hole (141).

7. The electronic heat sink thermal resistance testing apparatus of claim 6, wherein: the fan is a speed-adjustable fan (45) with adjustable rotating speed.