Cooling liquid circulation system and test equipment

Abstract

The utility model relates to a cooling liquid circulation system and test equipment. The cooling liquid circulation system comprises a liquid storage tank used for storing cooling liquid and provided with a liquid outlet, a liquid inlet, a filtering outlet and a filtering inlet; the water channel plate is communicated with the liquid outlet and the liquid inlet of the liquid storage tank through a pipeline, the water channel plate is provided with an opening, and the cooling liquid passes through the opening and is in contact with the power semiconductor borne on the water channel plate so as to cool the power semiconductor; the filtering mechanism comprises a conveying pipe and a filtering assembly, the conveying pipe is connected between the filtering outlet and the filtering inlet of the liquid storage tank, and the conveying pipe is provided with a first connecting end and a second connecting end; the filter assembly comprises a filter box, a first connecting sleeve and a filter element, one end of the filter box is provided with a first opening, the filter element can be installed in the filter box through the first opening, the first connecting sleeve is detachably connected to the first opening of the filter box and detachably connected with the first connecting end, and the other end of the filter box is detachably connected with the second connecting end.

Description

Technical Field

[0001] The utility model relates to the technical field of power semiconductor testing, in particular to a coolant circulation system and a testing device. Background Art

[0002] Power semiconductors (such as IGBT modules, etc.) need to be subjected to performance testing. During the testing process, a large amount of heat is generated by the power semiconductors, and a coolant circulation system is required to cool them. The coolant (such as ultrapure water) in the coolant circulation system is prone to generating impurities such as suspended solids, microorganisms, and ions during long-term cyclic use, and a filter is needed to filter the coolant. However, the filter layer in the traditional filter is not easy to clean. After long-term use, the adsorption force of the filter layer reaches saturation, reducing the filtering effect, and thus affecting the cooling effect. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a coolant circulation system and a testing device that can improve the above-mentioned defects for the problem that the filter layer in the filter in the prior art is not easy to clean, the adsorption force of the filter layer reaches saturation after long-term use, reducing the filtering effect, and thus affecting the cooling effect.

[0004] A coolant circulation system includes:

[0005] A liquid storage tank for storing coolant, and having a liquid outlet, a liquid inlet, a filtration outlet, and a filtration inlet;

[0006] A water channel plate is connected to the liquid outlet and the liquid inlet of the liquid storage tank through a pipeline. The water channel plate has at least one opening, and the coolant contacts at least a part of the power semiconductor carried on the water channel plate through the opening to cool the power semiconductor; and

[0007] A filtering mechanism includes a delivery pipe and a filtering component. The delivery pipe is connected between the filtration outlet and the filtration inlet of the liquid storage tank, and the delivery pipe has a first connection end and a second connection end; the filtering component includes a filtering box, a first connection sleeve, and a filter core. One end of the filtering box has a first opening, the filter core can be inserted into the filtering box through the first opening, the first connection sleeve is detachably connected to the first opening of the filtering box and is detachably connected to the first connection end, and the other end of the filtering box is detachably connected to the second connection end.

[0008] In one embodiment, one end of the first connection sleeve has a first external thread and the other end has a first internal thread;

[0009] One end of the first connecting sleeve having the first external thread is sleeved in the first opening and is threadedly connected to the filter box through the first external thread; one end of the first connecting sleeve having the first internal thread is sleeved on the outside of the first connecting end and is threadedly connected to the first connecting end through the first internal thread.

[0010] In one embodiment, the filter assembly further includes a first sealing ring, the inner wall of the first connecting sleeve has a first boss, the first sealing ring is sleeved in the first connecting sleeve and pressed between the first boss and the first connecting end.

[0011] In one embodiment, the filter assembly further includes a second sealing ring, the inner wall of the filter box has a second boss, the second sealing ring is sleeved in the filter box through the first opening, and is pressed between the second boss and the first connecting sleeve.

[0012] In one embodiment, the filter assembly further includes a second connecting sleeve, the filter box has a second opening at one end facing away from the first opening, and the second connecting sleeve is detachably connected to the second opening of the filter box and detachably connected to the second connecting end.

[0013] In one embodiment, one end of the second connecting sleeve has a second external thread, and the other end has a second internal thread;

[0014] One end of the second connecting sleeve having the second external thread is sleeved in the second opening and is threadedly connected to the filter box through the second external thread; one end of the second connecting sleeve having the second internal thread is sleeved on the outside of the second connecting end and is threadedly connected to the second connecting end through the second internal thread.

[0015] In one embodiment, the filter assembly further includes a third sealing ring, the inner wall of the second connecting sleeve has a third boss, the third sealing ring is sleeved in the second connecting sleeve and pressed between the third boss and the second connecting end.

[0016] In one embodiment, the filter assembly further includes a fourth sealing ring, the inner wall of the filter box has a fourth boss, the fourth sealing ring is sleeved in the filter box through the second opening, and is pressed between the fourth boss and the second connecting sleeve.

[0017] In one embodiment, the filter element comprises a fine sand layer, a non-woven fabric layer and a quartz sand layer; or

[0018] The filter element comprises an activated carbon layer, a reverse osmosis RO membrane layer, an ultrafiltration membrane layer and an ion exchange resin layer.

[0019] A testing device includes a testing apparatus and a coolant circulation system as described in any of the above embodiments. The testing apparatus is used to test the power semiconductor carried on the water channel plate.

[0020] For the above coolant circulation system and testing device, when it is necessary to clean or replace the filter element, first, detach the first connecting sleeve from the first connecting end of the delivery pipe, and detach the end of the filter cartridge facing away from the first connecting sleeve from the second connecting end of the delivery pipe; then, detach the first connecting sleeve from the filter cartridge, and take out the filter element from the first opening of the filter cartridge; then, install the cleaned or replaced filter element into the filter cartridge through the first opening; then, install the first connecting sleeve at the first opening of the filter cartridge; then, install the first connecting sleeve at the first connecting end of the delivery pipe, and install the end of the filter cartridge facing away from the first connecting sleeve at the second connecting end of the delivery pipe, thus completing the cleaning or replacement of the filter element. The operation is convenient and fast, which improves the filtering effect, and further helps to improve the cooling effect on the power semiconductor. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the coolant circulation system in an embodiment of the present invention;

[0022] Figure 2 is Figure 1 a cross-sectional view of the filter assembly of the coolant circulation system shown. Detailed Embodiments

[0023] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0025] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected to", "fixed" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0028] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0029] Please refer to Figure 1 and Figure 2, an embodiment of the present utility model provides a coolant circulation system, including a liquid storage tank 10, a water channel plate 20 and a filtering mechanism 30. The liquid storage tank 10 is used for storing coolant, and has a liquid outlet 11, a liquid inlet 12, a filtering outlet (not shown in the figure) and a filtering inlet (not shown in the figure). The water channel plate 20 is connected to the liquid outlet 11 and the liquid inlet 12 of the liquid storage tank 10 through pipelines, so that the coolant in the liquid storage tank 10 is output from the liquid outlet 11 to the inside of the water channel plate 20, and the coolant in the water channel plate 20 flows back to the liquid storage tank 10 through the liquid inlet 12. The power semiconductor is carried on the water channel plate 20, and the water channel plate 20 has at least one opening 21. The coolant in the water channel plate 20 contacts at least a part of the power semiconductor thereon through the opening 21 to cool the power semiconductor. Specifically, there is at least one flow channel in the water channel plate 20, and the flow channel is communicated with the opening 21. The coolant flows in the flow channel in the water channel plate 20 along a planned path, and fully contacts at least a part of the power semiconductor (such as the bottom surface, pins, etc. of the power semiconductor) through the opening 21 on the water channel plate 20 to dissipate heat from the power semiconductor and lower its temperature.

[0030] The filtering mechanism 30 includes a conveying pipe 31 and a filtering component 32. The conveying pipe 31 is connected between the filtering outlet and the filtering inlet of the liquid storage tank 10. The conveying pipe 31 has a first connection end 311 and a second connection end 312, and the filtering component 32 is connected between the first connection end 311 and the second connection end 312, so that the coolant in the liquid storage tank 10 enters the conveying pipe 31 from the filtering outlet, flows through the filtering component 32 along the conveying pipe 31 for filtering, and then enters the liquid storage tank 10 from the filtering inlet, thereby realizing the filtering of the coolant in the liquid storage tank 10.

[0031] The filtering component 32 includes a filtering box 321, a first connecting sleeve 322 and a filtering core 323. One end of the filtering box 321 has a first opening A1, and the filtering core 323 can be loaded into the filtering box 321 through the first opening A1. The first connecting sleeve 322 is detachably connected to the first opening A1 of the filtering box 321 and is detachably connected to the first connection end 311 of the conveying pipe 31. The other end of the filtering box 321 is detachably connected to the second connection end 312 of the conveying pipe 31.

[0032] In the above cooling cycle system, when it is necessary to clean or replace the filter element 323, first, detach the first connecting sleeve 322 from the first connecting end 311 of the conveying pipe 31, and detach the end of the filter cartridge 321 facing away from the first connecting sleeve 322 from the second connecting end 312 of the conveying pipe 31; then, detach the first connecting sleeve 322 from the filter cartridge 321, and take out the filter element 323 from the first opening A1 of the filter cartridge 321; then, insert the cleaned or replaced filter element 323 into the filter cartridge 321 through the first opening A1; then, install the first connecting sleeve 322 at the first opening A1 of the filter cartridge 321; then, install the first connecting sleeve 322 on the first connecting end 311 of the conveying pipe 31, and install the end of the filter cartridge 321 facing away from the first connecting sleeve 322 on the second connecting end 312 of the conveying pipe 31, thereby completing the cleaning or replacement of the filter element 323. The operation is convenient and fast, which improves the filtering effect and is conducive to improving the cooling effect on the power semiconductor.

[0033] In the embodiment of the present application, one end of the first connecting sleeve 322 has a first external thread (not shown in the figure), and the other end of the first connecting sleeve 322 has a first internal thread (not shown in the figure). The end of the first connecting sleeve 322 with the first external thread is sleeved in the first opening A1 and is threadedly connected to the filter cartridge 321 through the first external thread. It can be understood that the first opening A1 of the filter cartridge 321 has an internal thread that can be screwed with the first external thread of the first connecting sleeve 322. The end of the first connecting sleeve 322 with the first internal thread is sleeved outside the first connecting end 311 of the conveying pipe 31 and is threadedly connected to the first connecting end 311 of the conveying pipe 31 through the first internal thread. It can be understood that the first connecting end 311 of the conveying pipe 31 has an external thread that can be screwed with the first internal thread of the first connecting sleeve 322.

[0034] In this way, the first connecting sleeve 322 is connected to the filter cartridge 321 by means of threaded connection, so that the connection or separation of the first connecting sleeve 322 and the filter cartridge 321 can be realized by screwing the first connecting sleeve 322. Similarly, the first connecting sleeve 322 is connected to the first connecting end 311 of the conveying pipe 31 by means of threaded connection, so that the connection or separation of the first connecting sleeve 322 and the first connecting end 311 of the conveying pipe 31 can be realized by rotating the first connecting sleeve 322.

[0035] It should be noted that, in actual use, since both ends of the first connecting sleeve 322 are threadedly connected, the first connecting end 311 of the delivery pipe 31 and the filter box 321 can be fixed respectively, and then the first connecting sleeve 322 located between the filter box 321 and the first connecting end 311 of the delivery pipe 31 can be rotated so that the two ends of the first connecting sleeve 322 are tightened or loosened with the filter box 321 and the first connecting end 311 of the delivery pipe 31 at the same time, respectively, thereby realizing the first connecting sleeve 322 being connected or separated with the filter box 321 and the first connecting end 311 of the delivery pipe 31 at the same time.

[0036] Furthermore, the filter assembly 32 also includes a first sealing ring 324, and the inner wall of the first connecting sleeve 322 has a first boss B1. The first sealing ring 324 is sleeved in the first connecting sleeve 322 and pressed between the first boss B1 and the first connecting end 311 of the delivery pipe 31, thereby sealing the gap between the first connecting end 311 of the delivery pipe 31 and the inner wall of the first connecting sleeve 322 to prevent leakage. In this way, during assembly, the first sealing ring 324 is first sleeved in the first connecting sleeve 322, and then the first connecting sleeve 322 and the first connecting end 311 of the delivery pipe 31 are tightened, so that the first connecting end 311 of the delivery pipe 31 presses the first sealing ring 324 against the first boss B1 to form a sealing structure.

[0037] Furthermore, the filter assembly 32 further includes a second sealing ring 325, and the inner wall of the filter box 321 has a second boss B2. The second sealing ring 325 is sleeved in the filter box 321 through the first opening A1, and is pressed between the second boss B2 and the first connecting sleeve 322, thereby sealing the gap between the inner wall of the filter box 321 and the first connecting sleeve 322. In this way, during assembly, the second sealing ring 325 is first sleeved in the first opening A1 of the filter box 321, and then the first connecting sleeve 322 is tightened in the first opening A1 of the filter box 321, so that the end of the first connecting sleeve 322 with the first external thread presses the second sealing ring 325 on the second boss B2 to form a sealing structure.

[0038] In the embodiment of the present application, the filter assembly 32 further includes a second connecting sleeve 326, and the filter box 321 has a second opening A2 on the side facing away from the first opening A1. The second connecting sleeve 326 is detachably connected to the second opening A2 of the filter box 321, and is detachably connected to the second connecting end 312 of the delivery tube 31, that is, the filter box 321 is detachably connected to the second connecting end 312 of the delivery tube 31 through the second connecting sleeve 326, so that the filter box 321 can be quickly detached from the second connecting end 312 of the delivery tube 31 when the filter element 323 needs to be cleaned or replaced.

[0039] Specifically in the embodiment, one end of the second connecting sleeve 326 has a second external thread, and the other end of the second connecting sleeve 326 has a second internal thread. The end of the second connecting sleeve 326 with the second external thread is sleeved in the second opening A2 and is threadedly connected to the filter cartridge 321 through the second external thread. It can be understood that the second opening A2 of the filter cartridge 321 has an internal thread that can be screwed with the second external thread. The end of the second connecting sleeve 326 with the second internal thread is sleeved outside the second connecting end 312 of the conveying pipe 31 and is threadedly connected to the second connecting end 312 of the conveying pipe 31 through the second internal thread. It can be understood that the second connecting end 312 of the conveying pipe 31 has an external thread that can be screwed with the second internal thread.

[0040] In this way, the second connecting sleeve 326 is connected to the filter cartridge 321 by means of threaded connection, so that the connection or separation between the second connecting sleeve 326 and the filter cartridge 321 can be realized by screwing the second connecting sleeve 326. Similarly, the second connecting sleeve 326 is connected to the second connecting end 312 of the conveying pipe 31 by means of threaded connection, so that the connection or separation between the second connecting sleeve 326 and the second connecting end 312 of the conveying pipe 31 can be realized by rotating the second connecting sleeve 326.

[0041] It should be noted that in actual use, since both ends of the second connecting sleeve 326 are respectively connected to the second connecting end 312 of the filter cartridge 321 and the conveying pipe 31 by means of threaded connection, the second connecting end 312 of the conveying pipe 31 and the filter cartridge 321 can be fixed respectively, and then the second connecting sleeve 326 between the filter cartridge 321 and the second connecting end 312 of the conveying pipe 31 is rotated, so that both ends of the second connecting sleeve 326 are tightened or loosened simultaneously with the filter cartridge 321 and the second connecting end 312 of the conveying pipe 31 respectively, thereby realizing the connection or separation of the second connecting sleeve 326 with the filter cartridge 321 and the second connecting end 312 of the conveying pipe 31 at the same time.

[0042] Further, the filter assembly 32 further includes a third sealing ring 327, and the inner wall of the second connecting sleeve 326 has a third boss B3. The third sealing ring 327 is sleeved in the second connecting sleeve 326 and is pressed between the third boss B3 and the second connecting end 312 of the conveying pipe 31, so as to seal the gap between the second connecting end 312 of the conveying pipe 31 and the inner wall of the second connecting sleeve 326 and avoid liquid leakage. In this way, during assembly, first, the third sealing ring 327 is sleeved in the second connecting sleeve 326, and then the second connecting sleeve 326 is tightened with the second connecting end 312 of the conveying pipe 31, so that the second connecting end 312 of the conveying pipe 31 presses the third sealing ring 327 against the third boss B3 to form a sealing structure.

[0043] Further, the filter assembly 32 further includes a fourth sealing ring 328, and the inner wall of the filter cartridge 321 has a fourth boss B4. The fourth sealing ring 328 is sleeved in the filter cartridge 321 from the second opening A2 and is pressed between the fourth boss B4 and the second connecting sleeve 326, so as to seal the gap between the inner wall of the filter cartridge 321 and the second connecting sleeve 326. Thus, during assembly, first, the fourth sealing ring 328 is sleeved in the second opening A2 of the filter cartridge 321, and then the second connecting sleeve 326 is screwed tightly in the second opening A2 of the filter cartridge 321, so that one end of the second connecting sleeve 326 with a second external thread presses the fourth sealing ring 328 against the fourth boss B4 to form a sealing structure.

[0044] In some embodiments, the filter element 323 may include a fine sand layer, a non-woven fabric layer, and a quartz sand layer. Thus, the fine sand layer can filter out suspended solids, sediments, and some colloidal particles in the coolant. The non-woven fabric layer and the quartz sand layer can filter out solid particles such as suspended particles, microorganisms, dust, and oil stains in the coolant.

[0045] In other embodiments, the filter element 323 may include an activated carbon layer, a reverse osmosis RO membrane layer, an ultrafiltration membrane layer, and an ion exchange resin layer. Thus, the activated carbon layer can filter out organic matters, chlorine, odors, pigments, and certain heavy metal ions in the coolant. The reverse osmosis RO membrane layer and the ultrafiltration membrane layer can filter out most ions, organic matters, and microparticles in the coolant. The ultrafiltration membrane layer can also filter out smaller particles and some macromolecular substances such as proteins and viruses in the coolant. The ion exchange resin layer can filter out ionic pollutants in the coolant, such as heavy metal ions and certain organic acids.

[0046] Specifically in the embodiment, the filtering mechanism 30 further includes a water pump 33 installed on the conveying pipe 31. Under the pumping action of the water pump 33, the coolant in the liquid storage tank 10 enters the conveying pipe 31 from the filtering outlet, flows through the filter element 323 of the filter assembly 32 along the conveying pipe 31, and then enters the liquid storage tank 10 from the filtering inlet, and circulates in this way to remove impurities in the coolant in the liquid storage tank 10.

[0047] Specifically in the embodiment, the delivery pipe 31 includes a first sub-delivery pipe 31a, a second sub-delivery pipe 31b, a third sub-delivery pipe 31c, and a fourth sub-delivery pipe 31d. The filtering assemblies 32 are provided in two, and the two filtering assemblies 32 are respectively a first filtering assembly 32a and a second filtering assembly 32b. One end of the first sub-delivery pipe 31a is connected to the filtering outlet of the liquid storage tank 10, and the other end is connected to the input port of the water pump 33. One end of the second sub-delivery pipe 31b is connected to the output port of the water pump 33, and the other end of the second sub-delivery pipe 31b serves as the first connection end 311 and is threadedly connected to the first connection sleeve 322 of the first filtering assembly 32a. One end of the third sub-delivery pipe 31c serves as the second connection end 312 and is threadedly connected to the second connection sleeve 326 of the first filtering assembly 32a, and the other end of the third sub-delivery pipe 31c serves as the first connection end 311 and is threadedly connected to the first connection sleeve 322 of the second filtering assembly 32b. One end of the fourth sub-delivery pipe 31d serves as the second connection end 312 and is threadedly connected to the second connection sleeve 326 of the second filtering assembly 32b, and the other end of the fourth sub-delivery pipe 31d is connected to the filtering inlet of the liquid storage tank 10. Thus, under the pumping action of the water pump 33, the coolant in the liquid storage tank 10 flows through the first sub-delivery pipe 31a, the water pump 33, the second sub-delivery pipe 31b, the first filtering assembly 32a, the third sub-delivery pipe 31c, the second filtering assembly 32b, and the fourth sub-delivery pipe 31d in sequence from the filtering outlet, and then returns to the liquid storage tank 10 through the filtering inlet.

[0048] Optionally, the filter element 323 of the first filtering assembly 32a includes a fine sand layer, a non-woven fabric layer, and a quartz sand layer. The filter element 323 of the second filtering assembly 32b includes an activated carbon layer, a reverse osmosis RO membrane layer, an ultrafiltration membrane layer, and an ion exchange resin layer. Of course, the structures of the filter elements 323 of the first filtering assembly 32a and the second filtering assembly 32b are not limited to this. As long as the purity of the coolant in the liquid storage tank 10 can meet the process requirements, it is not limited here.

[0049] It should be noted that the number of the filtering assemblies 32 is not limited to two. In other embodiments, it can also be set to one or more than two, which is not limited here.

[0050] Specifically in the embodiment, an ultraviolet lamp 13 is further installed on the liquid storage tank. The ultraviolet lamp 13 is used to irradiate the coolant in the liquid storage tank 10 to sterilize and disinfect the coolant in the liquid storage tank 10, which is beneficial to reducing harmful substances in the coolant.

[0051] Specifically in the embodiment, a temperature sensor (not shown in the figure) is further installed in the liquid storage tank 10. The temperature sensor is used to detect the temperature of the coolant in the liquid storage tank 10 to monitor the temperature of the coolant in real time.

[0052] Furthermore, the coolant circulation system further includes an alarm 15, which is electrically connected to the temperature sensor. When the temperature sensor detects that the temperature of the coolant in the liquid storage tank 10 exceeds a preset value (i.e., the temperature of the coolant in the liquid storage tank 10 is too high), the alarm 15 is activated and sounds an alarm, so that the staff can perform maintenance in time. The alarm 15 can be installed on the liquid storage tank, or of course, can be installed in other locations, as long as it can play an alarm role, which is not limited here.

[0053] Furthermore, the coolant circulation system also includes a radiator (not shown), which is installed on the pipeline between the waterway plate 20 and the liquid inlet 12 of the liquid storage tank 10, so that the coolant flowing out of the waterway plate 20 passes through the radiator and then enters the liquid storage tank 10. In this way, the coolant absorbs the heat of the power semiconductor and heats up when flowing through the waterway plate 20. The radiator can cool the coolant when the coolant passes through the radiator, thereby ensuring that the coolant temperature in the liquid storage tank 10 is maintained within a preset temperature range during the coolant circulation process. It should be noted that the radiator is not limited to being installed on the pipeline between the waterway plate 20 and the liquid inlet 12 of the liquid storage tank 10. In other embodiments, it can also be installed on other pipelines connected to the liquid storage tank 10, such as the delivery pipe 31, as long as the coolant can be cooled so that the coolant temperature in the liquid storage tank 10 is maintained within a preset temperature range, and this is not limited here.

[0054] Based on the above-mentioned coolant circulation system, a test device is also provided in an embodiment of the present application. The test device includes a test device and a cooling circulation system as described in any of the above embodiments. The power semiconductor to be tested is carried on the waterway plate 20, and the test device tests the power semiconductor carried on the waterway plate 20. At the same time, the coolant flowing through the opening 21 of the waterway plate 20 contacts the power semiconductor, thereby taking away the heat generated by the power semiconductor during the test, ensuring that the temperature of the power semiconductor is maintained within the allowable range, that is, avoiding the temperature of the power semiconductor from being too high.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A cooling liquid circulation system, characterized in that: include: A liquid storage tank (10) is used to store cooling liquid and has a liquid outlet (11), a liquid inlet (12), a filter outlet and a filter inlet; a waterway plate (20) connected to the liquid outlet (11) and the liquid inlet (12) of the liquid storage tank (10) through a pipeline, the waterway plate (20) having at least one opening (21), and the cooling liquid contacts at least a part of the power semiconductor carried on the waterway plate (20) through the opening (21) to cool the power semiconductor; and A filter mechanism (30) comprises a delivery pipe (31) and a filter assembly (32), wherein the delivery pipe (31) is connected between the filter outlet and the filter inlet of the liquid storage tank (10), and the delivery pipe (31) has a first connection end (311) and a second connection end (312); the filter assembly (32) comprises a filter box (321), a first connection sleeve (322) and a filter core (323), one end of the filter box (321) has a first opening (A1), and the filter core (323) can be loaded into the filter box (321) through the first opening (A1), the first connection sleeve (322) is detachably connected to the first opening (A1) of the filter box (321), and is detachably connected to the first connection end (311), and the other end of the filter box (321) is detachably connected to the second connection end (312).

2. The coolant circulation system according to claim 1, characterized in that: One end of the first connecting sleeve (322) has a first external thread, and the other end has a first internal thread; One end of the first connecting sleeve (322) having the first external thread is sleeved in the first opening (A1) and is threadedly connected to the filter box (321) via the first external thread; one end of the first connecting sleeve (322) having the first internal thread is sleeved outside the first connecting end (311) and is threadedly connected to the first connecting end (311) via the first internal thread.

3. The coolant circulation system according to claim 2, characterized in that: The filter assembly (32) further comprises a first sealing ring (324); the inner wall of the first connecting sleeve (322) comprises a first boss (B1); the first sealing ring (324) is sleeved in the first connecting sleeve (322) and pressed between the first boss (B1) and the first connecting end (311).

4. The coolant circulation system according to claim 2, characterized in that: The filter assembly (32) further comprises a second sealing ring (325); the inner wall of the filter box (321) comprises a second boss (B2); the second sealing ring (325) is sleeved in the filter box (321) through the first opening (A1) and is pressed between the second boss (B2) and the first connecting sleeve (322).

5. The coolant circulation system according to claim 1, characterized in that: The filter assembly (32) further comprises a second connecting sleeve (326); the filter box (321) has a second opening (A2) at one end facing away from the first opening (A1); the second connecting sleeve (326) is detachably connected to the second opening (A2) of the filter box (321) and is detachably connected to the second connecting end (312).

6. The coolant circulation system according to claim 5, characterized in that: One end of the second connecting sleeve (326) has a second external thread, and the other end has a second internal thread; The second connecting sleeve (326) has one end with the second external thread which is sleeved inside the second opening (A2) and is threadedly connected to the filter box (321) via the second external thread; the second connecting sleeve (326) has one end with the second internal thread which is sleeved outside the second connecting end (312) and is threadedly connected to the second connecting end (312) via the second internal thread.

7. The coolant circulation system according to claim 5, characterized in that: The filter assembly (32) further comprises a third sealing ring (327); the inner wall of the second connecting sleeve (326) comprises a third boss (B3); the third sealing ring (327) is sleeved in the second connecting sleeve (326) and is pressed between the third boss (B3) and the second connecting end (312).

8. The coolant circulation system according to claim 5, characterized in that: The filter assembly (32) further comprises a fourth sealing ring (328); the inner wall of the filter box (321) comprises a fourth boss (B4); the fourth sealing ring (328) is sleeved in the filter box (321) through the second opening (A2) and is pressed between the fourth boss (B4) and the second connecting sleeve (326).

9. The coolant circulation system according to any one of claims 1 to 8, characterized in that: The filter element (323) comprises a fine sand layer, a non-woven fabric layer and a quartz sand layer; or The filter element (323) comprises an activated carbon layer, a reverse osmosis (RO) membrane layer, an ultrafiltration membrane layer and an ion exchange resin layer.

10. A testing device, characterized in that: It comprises a testing device and a coolant circulation system as claimed in any one of claims 1 to 9, wherein the testing device is used to test the power semiconductor carried on the waterway plate (20).

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