A heat conduction detection fixture and detection method thereof

Abstract

The present invention discloses a thermal conductivity detection fixture and a detection method thereof, comprising: a constant temperature unit for placing a product to be tested encapsulated with a temperature sensor and transmitting the temperature to the encapsulated temperature sensor; a display control unit connected to the encapsulated temperature sensor and having a built-in timing element for real-time monitoring of the temperature sensed by the temperature sensor and determining whether the temperature rise of the temperature sensor meets the standard within a preset time period. The present invention places the encapsulated temperature sensor on the constant temperature unit. Since the temperature of the constant temperature unit is constant, by monitoring whether the temperature rise of the temperature sensor on the product to be tested meets the standard within a preset time period, it is possible to determine whether the thermal conductivity of the encapsulated temperature sensor is qualified.

Description

Technical Field

[0001] The present invention relates to the technical field of heat conduction detection, and in particular to a heat conduction detection jig and a detection method thereof. Background Art

[0002] With the advancement of science and technology and the improvement of consumption levels in my country, more and more smart products are becoming part of people's lives. These products are powerful and diverse, but their overall quality levels vary. This is especially true for products with temperature display functions. This function is greatly affected by the temperature sensor packaging process. In actual production, poor thermal conductivity is very likely to occur, affecting the accuracy of the temperature display function, and the temperature reminder and warning functions inherent in the product will also lose their original meaning. Therefore, testing the thermal conductivity of the temperature sensor after packaging is a crucial step in ensuring the product's temperature display function.

[0003] To this end, the present invention provides a device for detecting the thermal conductivity of a packaged temperature sensor. Summary of the Invention

[0004] The main purpose of the present invention is to provide a heat conduction detection fixture and a detection method for detecting the thermal conductivity of a packaged temperature sensor.

[0005] To achieve the above objectives, the present invention provides a heat conduction detection fixture, comprising:

[0006] The constant temperature unit is used to place the product to be tested encapsulated with the temperature sensor and transfer the temperature to the encapsulated temperature sensor;

[0007] The display control unit is connected to the packaged temperature sensor and has a built-in timing element for real-time monitoring of the temperature sensed by the temperature sensor and determining whether the temperature rise of the temperature sensor meets the standard within a preset time period.

[0008] Furthermore, the constant temperature unit includes a liquid storage box and a temperature control component, wherein the liquid storage box is used to store liquid and has a steam outlet on the top;

[0009] The temperature control component is used to control the temperature of the liquid in the liquid storage box to keep the temperature of the liquid in the liquid storage box constant.

[0010] Furthermore, the constant temperature unit also includes a heat-conducting column made of a heat-conducting medium, one end of which is located in the liquid storage box and contacts the liquid in the liquid storage box, and the other end passes through the steam outlet and contacts the corresponding temperature sensor of the product to be tested.

[0011] Furthermore, the steam outlet is sealed by a sealing device, and one end of the heat-conducting column passes through the sealing device and enters the liquid storage box.

[0012] Furthermore, a blocking ring is provided at one end of the heat-conducting column located at the top of the sealing device, and an elastic force-applying mechanism is provided between the blocking ring and the sealing device;

[0013] A positioning component is provided on the top of the sealing device, and the positioning component is used to locate the position between the product to be tested and the sealing device;

[0014] One end of the heat-conducting column is slidably arranged on the positioning component and is pressed against the product to be tested under the elastic force of the elastic force applying mechanism.

[0015] Furthermore, the temperature control assembly includes a heating component, a first temperature sensing component and a second temperature sensing component located in the liquid storage tank;

[0016] The first temperature sensing component is attached to the heating component and is used to monitor the temperature of the heating component in real time;

[0017] The second temperature sensing component is used to monitor the temperature of the liquid in the liquid storage tank in real time;

[0018] The heating component, the first temperature sensing component and the second temperature sensing component are connected to a display control unit, and the display control unit can control the on and off of the heating component.

[0019] Furthermore, the display control unit includes a box body and a PCB substrate located in the box body, and the PCB substrate is provided with a main control chip and four display screens, a start key, a "plus" key and a "minus" key connected to the main control chip.

[0020] Furthermore, the display control unit has a built-in countdown module.

[0021] A method for detecting a heat conduction detection jig includes the above-mentioned heat conduction detection jig, and the detection method includes the following steps:

[0022] S1. Inject liquid into the liquid storage tank and use a temperature control component to control the temperature of the liquid in the liquid storage tank to keep the temperature of the liquid in the liquid storage tank constant;

[0023] S2. Use the countdown module to set the shutdown countdown time according to the actual liquid consumption;

[0024] S3. Setting the detection time and the temperature parameters of the liquid in the liquid storage tank;

[0025] S4. Connect the temperature sensor on the product to be tested to the display control unit. After the temperature of the liquid in the liquid storage tank reaches the specified temperature, place the product to be tested on the heat-conducting column and start timing.

[0026] S5. Determine whether the thermal conductivity of the packaged temperature sensor meets the requirements based on the temperature rise of the temperature sensor per unit time at the specified temperature.

[0027] The beneficial effects of the present invention are embodied in:

[0028] The present invention places the packaged temperature sensor on a constant temperature unit. Since the temperature of the constant temperature unit is constant, the thermal conductivity of the packaged temperature sensor can be determined by monitoring whether the temperature rise of the temperature sensor on the product to be tested meets the standard within a preset time period. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is an overall view of the heat conduction detection fixture of the present invention;

[0030] Figure 2 This is an exploded view of the heat conduction detection fixture of the present invention;

[0031] Figure 3 This is a structural view of the PCB substrate in the present invention;

[0032] Figure 4 This is a half-section view of the heat conduction detection fixture of the present invention.

[0033] Description of reference numerals:

[0034] 1-Product under test, 11-Temperature sensor, 2-Constant temperature unit, 21-Liquid storage box, 22-Heat conduction column, 221-Blocking ring, 23-Sealing device, 24-Sealing ring, 25-Elastic force mechanism, 26-Positioning component, 27-Giving groove, 3-Display control unit, 31-Box body, 32-PCB substrate, 321-Main control chip, 322-Start button, 323-"Plus" button, 324-"Minus" button, 325-Temperature setting display, 326- Timing indication display screen, 327-rising temperature display screen, 328-actual temperature display screen, 329-shutdown countdown display screen, 33-detection status indicator light, 34-NTC connection indicator light, 35-liquid temperature indicator light, 36-heating indicator light, 37-power indicator light, 38-main power switch, 381-power cord, 39-heating power switch, 4-heating component, 41-thermal conductive fixing device, 5-first temperature sensing component, 6-second temperature sensing component. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] In addition, "plurality" means two or more.

[0037] See also Figures 1 to 4 .

[0038] The present invention provides a heat conduction detection jig, comprising:

[0039] The constant temperature unit 2 is used to place the product to be tested 1 encapsulated with the temperature sensor 11 and transfer the temperature to the encapsulated temperature sensor 11;

[0040] The display control unit 3 is connected to the packaged temperature sensor 11 and has a built-in timing element for real-time monitoring of the temperature sensed by the temperature sensor 11 and determining whether the temperature rise of the temperature sensor 11 meets the standard within a preset time period.

[0041] In a specific implementation, the packaged temperature sensor 11 is connected to the display control unit 3. The product 1 under test, encapsulated with the temperature sensor 11, is then placed on the constant temperature unit 2. Once the product 1 under test comes into contact with the constant temperature unit 2, heat from the constant temperature unit 2 is transferred to the product 1 under test. The temperature sensed by the temperature sensor 11 changes, and this temperature information is transmitted to the display control unit 3. Simultaneously, a timing element operates. If the temperature rise of the temperature sensor 11 meets the specified value within a preset time period, the display control unit 3 displays a "pass" indicator. If the temperature rise of the temperature sensor 11 does not meet the specified value, the display control unit 3 displays a "fail" indicator.

[0042] In the present invention, by placing the product to be tested 1 encapsulated with the temperature sensor 11 on the constant temperature unit 2, since the temperature of the constant temperature unit 2 is constant, by monitoring whether the temperature rise of the temperature sensor 11 on the product to be tested 1 meets the standard within a preset time period, it can be determined whether the thermal conductivity of the temperature sensor 11 after encapsulation is qualified.

[0043] In one embodiment, the constant temperature unit 2 includes a liquid storage tank 21 and a temperature control component. The liquid storage tank 21 is used to store liquid and has a steam outlet on its top; the temperature control component is used to control the temperature of the liquid in the liquid storage tank 21 so that the temperature of the liquid in the liquid storage tank 21 is constant.

[0044] In a specific implementation, the position of the temperature sensor 11 corresponding to the product to be tested 1 is placed at the steam outlet of the liquid storage tank 21. Since the temperature of the liquid in the liquid storage tank 21 is approximately constant, it can play the role of constant temperature heating of the product to be tested 1.

[0045] In one embodiment, if the product 1 to be tested is in direct contact with steam, water droplets will form on the surface of the product, and the steam will easily escape, causing the heat of the constant temperature unit 2 to be lost too quickly. Therefore, the following technical means are used:

[0046] The constant temperature unit 2 also includes a heat-conducting column 22 made of a heat-conducting medium. One end of the heat-conducting column 22 is located in the liquid storage box 21 and contacts the liquid in the liquid storage box 21, and the other end passes through the steam outlet to contact the corresponding part of the temperature sensor 11 of the product to be tested 1.

[0047] In a specific implementation, since the temperature of the liquid in the liquid storage box 21 remains unchanged and the thermal conductivity of the thermal conductive column 22 remains unchanged, the temperature of the thermal conductive column 22 is approximately constant. By allowing the product to be tested 1 to contact the thermal conductive column 22, water droplets are not easily generated on the surface of the product; and because the area of ​​the thermal conductive column 22 is small, the constant temperature unit 2 loses relatively little heat.

[0048] Preferably, the heat conducting column 22 is a metal heat conducting column.

[0049] In one embodiment, the liquid storage box 21 adopts an insulation structure (for example, the structure of a double-layer thermos bottle), the steam outlet is sealed by a sealing device 23, and one end of the heat-conducting column 22 passes through the sealing device 23 and enters the bottle. This design improves the thermal insulation performance of the liquid storage box, reduces heat loss, and saves energy consumption for thermal insulation.

[0050] Preferably, the sealing device 23 is in the shape of a stepped shaft, and a sealing ring 24 is provided at its shaft shoulder. When the sealing device 23 is inserted into the bottle mouth, the sealing ring 24 is in full contact with the upper surface of the bottle mouth, thereby increasing the sealing performance and further reducing the heat loss in the liquid storage box 21.

[0051] In one embodiment, a stop ring 221 is provided at one end of the heat-conducting column 22 located at the top of the sealing device 23, and an elastic force-applying mechanism 25 is provided between the stop ring 221 and the sealing device 23;

[0052] A positioning member 26 is provided on top of the sealing device 23 to locate the position between the product under test 1 and the sealing device 23. One end of the thermally conductive column 22 slides through the positioning member 26 and, under the elastic force of the elastic force-applying mechanism 25, rests against the product under test 1 at the top of the positioning member 26. This improves the reliability of the contact between the thermally conductive column and the product under test.

[0053] In practice, when the product 1 to be tested is placed on the positioning member 26, the product 1 to be tested presses the thermally conductive pillar 22, which in turn squeezes the elastic force-applying mechanism 25, causing the elastic force-applying mechanism 25 to compress and deform. After the test operation is completed, the thermally conductive pillar 22 automatically returns to its original position under the elastic force of the elastic force-applying mechanism 25.

[0054] For example Figure 4 As shown, the product under test 1 is in the shape of a cup lid with internal threads, and the temperature sensor 11 is located on the top of the product under test 1. When treating this type of product, the positioning component 26 can be configured as a component with external threads that matches the product under test 1. The side of the product under test 1 facing away from the temperature sensor 11 is screwed onto the positioning component 26. Then, the thermally conductive column 22, driven by the elastic force-applying mechanism 25, abuts the corresponding position of the temperature sensor 11 on the product under test 1. Under the elastic force of the elastic force-applying mechanism 25, a gap is unlikely to form between the thermally conductive column 22 and the product under test 1, ensuring reliable contact.

[0055] Preferably, the elastic force applying mechanism 25 is a spring.

[0056] Preferably, the sealing device 23 and the positioning component 26 are provided with a clearance groove 27 at the position of the corresponding elastic force applying mechanism 25 and the blocking ring 221, and the elastic force applying mechanism 25, the blocking ring 221 and the heat conducting column 22 at the corresponding position are wrapped by the clearance groove 27 to prevent heat loss from the heat conducting column 22.

[0057] In one embodiment, the temperature control assembly includes a heating component 4, a first temperature sensing component 5, and a second temperature sensing component 6 located in the liquid storage tank 21. The first temperature sensing component 5 is attached to the heating component 4 and is used to monitor the temperature of the heating component 4 in real time; the second temperature sensing component 6 is used to monitor the temperature of the liquid in the liquid storage tank 21 in real time.

[0058] The heating component 4, the first temperature sensing component 5 and the second temperature sensing component 6 are connected to the display control unit 3. The display control unit 3 can monitor the temperature of the heating component 4 and the liquid in the liquid storage tank 21 in real time according to the first temperature sensing component 5 and the second temperature sensing component 6, and control the power on and off of the heating component 4.

[0059] In real time, the heating component 4 heats the liquid in the liquid storage tank 21. When the second temperature sensing component 6 senses that the temperature of the liquid in the liquid storage tank 21 reaches the specified temperature, the display control unit 3 controls the heating component 4 to cut off the power and stop working, otherwise the heating component 4 continues to work; if the first temperature sensing component 5 senses that the temperature of the heating component 4 is particularly high, higher than a certain value (such as higher than 150°C or 180°C, which can be adjusted according to the characteristics and model of the heating component 4 in specific practice), it indicates that the heating component 4 is in a dry burning state. At this time, the display control unit 3 controls the heating component 4 to cut off the power and stop working to avoid the heating component 4 from being burned.

[0060] Preferably, the heating component 4 is a heating rod. The heating component 4 and the first temperature sensing component 5 pass through a heat-conducting fixing device 41, which holds the heating component 4 and the first temperature sensing component 5 close together. The heat-conducting fixing device 41 can be a fixing block or can be tied and fixed using wire, string, etc.

[0061] In one embodiment, the display control unit 3 includes a box body 31 and a PCB substrate 32 located in the box body 31. The PCB substrate 32 is provided with a main control chip 321 and four display screens connected to the main control chip 321, a start key 322, a "plus" key 323 and a "minus" key 324. The four display screens are respectively a temperature setting display screen 325, a timing indication display screen 326, a rising temperature display screen 327 and an actual temperature display screen 328, which are respectively used to display the set liquid temperature in the liquid storage tank 21, the duration of the experiment, how much the temperature sensor 11 to be measured has risen, and the actual temperature in the liquid storage tank 21 at the moment; the start key 322 is used to control the display control unit 3 to start; the "plus" key 323 and the "minus" key 324 are used to cooperate with the start key 322 to adjust the parameters of the display control unit 3.

[0062] In a specific implementation, after power is turned on, all four display screens light up. Then, long press the start button 322 for 3 seconds to unlock and start, entering the information display interface. Long press the start button 322 for 3 seconds again to enter the setting state. At this time, the corresponding display screen flashes, prompting you to short press the "plus" key 323 or "minus" key 324 to adjust the corresponding liquid temperature parameter in the liquid storage tank 21 or the experiment duration parameter. After confirmation, short press the start button 322 to set the next function. And so on. After all parameters are set, long press the start button 322 for 3 seconds to exit the setting interface and save the setting information successfully. The heating component 4 then heats the liquid in the liquid storage tank 21. When the second temperature sensing component 6 senses that the temperature of the liquid in the liquid storage tank 21 has reached the specified temperature, the system automatically determines whether the liquid temperature meets the test conditions. If it meets the conditions, the test operation is started.

[0063] In one embodiment, the display control unit 3 has a built-in countdown module, which includes a shutdown countdown display screen 329. The shutdown countdown display screen 329 is connected to the main control chip 321 for countdown display.

[0064] In practice, after the start button 322 is unlocked and activated, the built-in countdown module begins counting down (initially set to 2 hours, which can be adjusted later based on actual water consumption). After the countdown module reaches zero, the display control unit 3 controls the heating element 4 to shut down. This reduces risks during production and prevents the heating element 4 from drying out. Together with the first temperature sensing element 5, it forms two safeguards against drying out, enhancing safety.

[0065] Preferably, the PCB substrate 32 is provided with a detection status indicator light 33, an NTC connection indicator light 34, a liquid temperature indicator light 35, a heating indicator light 36, a power indicator light 37, a main power switch 38, a power cord 381, and a heating power switch 39. One end of the power cord 381 is connected to the main power switch 38, and the other end is used to be plugged into an external power socket.

[0066] The present invention also provides a method for detecting a heat conduction detection jig, including the above-mentioned heat conduction detection jig, and the detection method includes the following steps:

[0067] S1, injecting liquid into the liquid storage box 21 and controlling the temperature of the liquid in the liquid storage box 21 by using a temperature control component to keep the temperature of the liquid in the liquid storage box 21 constant;

[0068] S2. Use the countdown module to set the shutdown countdown time according to the actual liquid consumption;

[0069] S3, setting the detection time and the temperature parameters of the liquid in the liquid storage tank 21;

[0070] S4. Connect the temperature sensor 11 on the product to be tested 1 to the display control unit 3. After the temperature of the liquid in the liquid storage tank 21 reaches the specified temperature, place the product to be tested 1 on the heat-conducting column 22 and start timing.

[0071] S5. Determine whether the thermal conductivity of the packaged temperature sensor 11 meets the standard based on the temperature rise of the temperature sensor 11 per unit time at the specified temperature.

[0072] In specific implementation: First, after checking that all terminals are connected normally, inject heated liquid (such as hot water) into the liquid storage box 21 to shorten the heating time. Ensure that the first temperature sensing component 5, the second temperature sensing component 6, and the heating component 4 are all immersed in the liquid.

[0073] Afterwards, after the power cord 381 is connected to the power supply, turn the main power switch 38, at this time the power indicator light 37 is long on, and all five display screens are lit. At this time, long press the 3S start button 322 to unlock and enter the information display interface, and at the same time the shutdown countdown display screen 329 starts the working countdown. Long press the 3S start button 322 again to enter the setting state. At this time, one of the display screens flashes, prompting you to short press the "plus" key 323 or the "minus" key 324 to set and adjust the detection time of the temperature sensor 11 to be tested. After confirmation, short press the start button 322 to set the next function, and so on. After all the parameters are set, long press the 3S start button 322, exit the setting interface, and the setting information is saved successfully. Further, turn the heating power switch 39, at this time the heating indicator light 36 is on, and the system automatically determines whether the liquid temperature meets the test conditions. When the liquid temperature meets the test conditions, the liquid temperature indicator light 35 is on, and the test work can be started.

[0074] Then, the temperature sensor 11 on the product to be tested 1 is normally connected to the main control chip 321 through a wire. At this time, the NTC connection indicator light 34 is always on. Further, the product to be tested 1 is placed on the positioning component 26 and in close contact with the heat-conducting metal column. At this time, the NTC connection indicator light 34 is flashing to indicate that it is being tested. The system will automatically detect the sensor temperature rise value and display the data on the timing indicator display 326 and the rising temperature display 327, and judge whether the temperature rise can reach the specified requirements within the timing setting time, so as to judge whether the thermal conductivity of the sensor meets the requirements. After the test is completed, observe the test status indicator light 33. A green light indicates qualified, and a red light indicates unqualified. Disconnect the product to be tested 1. If the liquid temperature indicator light 35 is always on, replace the semi-finished product and continue testing.

[0075] Finally, when stopping the test, turn off the heating power switch 39 and the main power switch 38 in sequence, disconnect the power cord 381, and let the test equipment stand still (if you need to move the test instrument, you need to wait for 5 minutes for the heating components to cool down, be careful to prevent high temperature burns).

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heat conduction detection fixture, characterized in that: include: A constant temperature unit (2) is used to place the product to be tested (1) encapsulated with a temperature sensor (11) and transmit the temperature to the encapsulated temperature sensor (11); A display control unit (3) is connected to the packaged temperature sensor (11) and has a built-in timing element for real-time monitoring of the temperature sensed by the temperature sensor (11) and determining whether the temperature rise of the temperature sensor (11) meets the standard within a preset time period; the display control unit (3) also has a built-in countdown module; the display control unit (3) comprises a box body (31) and a PCB substrate (32) located in the box body (31); the PCB substrate (32) is provided with a main control chip (321) and four display screens connected to the main control chip (321), a start key (322), a "plus" key (323), and a "minus" key (324); The constant temperature unit (2) comprises a liquid storage box (21) and a temperature control component. The liquid storage box (21) is used to store liquid and has a steam outlet at the top. The temperature control component is used to control the temperature of the liquid in the liquid storage box (21) so that the temperature of the liquid in the liquid storage box (21) is constant; The constant temperature unit (2) further comprises a heat-conducting column (22) made of a heat-conducting medium, one end of the heat-conducting column (22) being located in the liquid storage box (21) and in contact with the liquid in the liquid storage box (21), and the other end of the heat-conducting column (22) passing through the steam outlet and being in contact with a portion of the temperature sensor (11) corresponding to the product to be tested (1); The steam outlet is plugged with a sealing device (23), and one end of the heat-conducting column (22) passes through the sealing device (23) and enters the liquid storage box (21); A blocking ring (221) is provided at one end of the heat-conducting column (22) located at the top of the sealing device (23), and an elastic force-applying mechanism (25) is provided between the blocking ring (221) and the sealing device (23); A positioning component (26) is provided on the top of the sealing device (23), and the positioning component (26) is used to locate the position between the product to be tested (1) and the sealing device (23); One end of the heat-conducting column (22) is slidably mounted on the positioning component (26) and is pressed against the product to be tested (1) under the elastic force of the elastic force-applying mechanism (25).

2. The heat conduction detection jig according to claim 1, characterized in that: The temperature control component comprises a heating component (4), a first temperature sensing component (5), and a second temperature sensing component (6) located in a liquid storage box (21); The first temperature sensing component (5) is attached to the heating component (4) and is used to monitor the temperature of the heating component (4) in real time; The second temperature sensing component (6) is used to monitor the temperature of the liquid in the liquid storage box (21) in real time; The heating component (4), the first temperature sensing component (5) and the second temperature sensing component (6) are connected to a display control unit (3), and the display control unit (3) can control the on and off of the heating component (4).

3. A method for detecting a heat conduction detection fixture, characterized in that: The heat conduction detection jig according to claim 1 or 2, wherein the detection method comprises the following steps: S1, injecting liquid into the liquid storage box (21) and controlling the temperature of the liquid in the liquid storage box (21) by using a temperature control component to keep the temperature of the liquid in the liquid storage box (21) constant; S2. Use the countdown module to set the shutdown countdown time according to the actual liquid consumption; S3, setting the detection time and the temperature parameters of the liquid in the liquid storage box (21); S4, connecting the temperature sensor (11) on the product to be tested (1) to the display control unit (3), and after the temperature of the liquid in the liquid storage box (21) reaches the specified temperature, placing the product to be tested (1) on the heat-conducting column (22) and starting the timing; S5. Judging whether the thermal conductivity of the packaged temperature sensor (11) meets the standard based on the temperature rise of the temperature sensor (11) per unit time at the specified temperature.

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