Liquid-cooled power electronics
By introducing a honeycomb structure and atomization evaporation mechanism into liquid-cooled power electronic devices, the problem of increased thermal resistance caused by the thickness of the coolant fluid boundary layer is solved, achieving efficient and uniform heat dissipation and improving the reliability and stability of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUBEI UNIV OF TECH
- Filing Date
- 2026-04-07
- Publication Date
- 2026-07-14
AI Technical Summary
In existing liquid-cooled power electronic devices, the fluid boundary layer inside the coolant is relatively thick, which increases thermal resistance and leads to a decrease in heat dissipation efficiency, especially in high power density scenarios where local overheating is likely to occur.
The honeycomb structure increases the contact area between the coolant and the hot surface. Combining multiple heat exchange mechanisms such as liquid cooling, air flow and atomization evaporation, the honeycomb structure disturbs the liquid flow, enhances convective heat transfer, and utilizes atomized water evaporation for cooling, thereby achieving circulating cooling of the coolant and uniform heat distribution.
It significantly improves heat dissipation efficiency and temperature uniformity, reduces the risk of local hot spots, extends device life, enhances the reliability and operational stability of power electronic devices, and saves energy.
Smart Images
Figure CN122395892A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power electronic device cooling technology, and more specifically, to a liquid-cooled power electronic device. Background Technology
[0002] With the development of renewable energy, rail transportation, electric vehicles, and high-power industrial power electronic systems, the power density and operating voltage of power electronic devices are continuously increasing, leading to a significant rise in heat generation. Liquid cooling, as a highly efficient thermal management solution, can effectively improve the performance and reliability of power electronic devices and is widely used in high-power-density systems, thereby enhancing equipment operational stability and lifespan. Although liquid cooling excels in improving heat dissipation efficiency, challenges remain in system design, long-term reliability, operation and maintenance, and cost control. In the future, liquid cooling technology will play a crucial role in driving the development of power electronic systems towards higher performance and efficiency.
[0003] A search revealed a liquid-cooled power electronic device and a method for manufacturing the liquid-cooled power electronic device proposed in Chinese Patent Publication No.: CN110858569A. The liquid-cooled power electronic device includes: a monolithic coolant defining a fluid passage; a separately manufactured main housing having a recess for receiving the coolant; and a circuit board having electronic components in thermal contact with the coolant, wherein the coolant is held within the recess, between the main housing and the circuit board. This arrangement has one or more advantages related to improved leak testing, improved thermal performance, and reduced scrap.
[0004] While the aforementioned patents can achieve the detection function, they still have the following shortcomings in actual use: In actual use, the above solution dissipates heat by contacting the outer wall of the cooling body with the circuit. At this time, the coolant inside the cooling body is mainly in laminar flow, the fluid boundary layer is thick, the thermal resistance increases, and the heat exchange efficiency of the coolant to the inner wall of the heat pipe decreases. In high power density scenarios, local overheating is likely to occur.
[0005] Therefore, we have made improvements to this by proposing a liquid-cooled power electronic device to solve the problems mentioned above. Summary of the Invention
[0006] The purpose of this invention is to provide a liquid-cooled power electronic device to solve the problems mentioned in the background art.
[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A liquid-cooled power electronic device includes a housing and further includes: An air inlet is located on one side of the outer wall of the housing and is used to allow air to enter the housing. The air outlet is located on the outer wall of the other side of the casing and is used to circulate the air inside the casing. Multiple components are fixedly connected to the middle section of the bottom wall of the housing; Multiple heat transfer frames are fixedly connected to the top wall of the component. A cooling assembly, located on top of the component, is used to cool the component. The connecting pipe is located at the liquid storage end of the cooling component and is used to collect and transport the heated coolant. The first heat dissipation tower is fixedly connected to the inner wall of one side of the shell. Its liquid inlet end is fixedly connected to the end of the connecting pipe away from the cooling component. The coolant in the cooling component is transported into the first heat dissipation tower through the connecting pipe. The heat exchange component is located inside the first heat dissipation tower and is used to exchange heat between the coolant and the outside air, and to preheat the outside air. The connecting component is located on the outside of the outlet end of the heat exchange component and is used to output the coolant after heat exchange. An air exchange component, located inside the first heat exchange tower, is used to extract and transport the air inside the first heat exchange tower after the heat exchange process. Two sets of cleaning components are located on the outer side of the top of the first heat exchange tower and are symmetrically distributed about the central axis of the first heat exchange tower. They are used to clean the air inlet of the air exchange components. The atomizing chamber is fixedly connected to the outside of the air outlet of the ventilation component; The atomizing component is located inside the atomizing chamber and supplies atomized water into the chamber. The second heat dissipation tower is fixedly connected to the end of the atomizing chamber away from the ventilation component, and its top is connected to the liquid outlet end of the connecting component to transport coolant into the inner side of the second heat dissipation tower. The cooling component is located inside the second heat dissipation tower and is used for secondary cooling of the coolant. The condensation component is located on the side of the second heat dissipation tower away from the atomization chamber. It is used to condense the hot air containing water vapor and reduce the moisture content in the air. Its liquid outlet is connected to the liquid storage end of the atomization component. The second delivery pump is fixedly connected to the outer wall of the second heat sink near the cooling component, and is used to deliver the cooled coolant back into the cooling component for circulation.
[0008] As a preferred technical solution of this application, the cooling assembly includes a heat-conducting head detachably connected to the bottom wall of the housing. The liquid inlet end of the heat-conducting head is connected to the liquid outlet end of the second delivery pump. A diversion channel is opened in the middle section of the inner side of the heat-conducting head. Multiple displacement heads are fixedly connected to the inner side of the heat-conducting head. The displacement heads are engaged with the heat transfer frame. A honeycomb structure is provided on the inner side of the displacement heads. A confluence channel is opened inside both sides of the heat-conducting head. The confluence channel is symmetrically distributed about the central axis of the diversion channel. The liquid outlet end of the confluence channel is connected to the liquid inlet end of the connecting pipe.
[0009] As a preferred technical solution of this application, the heat exchange component includes a heat dissipation channel opened inside the first heat dissipation tower and a plurality of air ducts opened inside the first heat dissipation tower between the heat dissipation channels. A partition is fixedly connected to the middle section of the inner side of the air ducts, and the liquid inlet end of the heat dissipation channel is connected to the liquid outlet end of the connecting pipe.
[0010] As a preferred technical solution of this application, the connecting component includes a first connecting pipe fixedly connected to the outer wall of the first heat dissipation tower on the side away from the connecting pipe. The first connecting pipe is connected to the liquid outlet end of the heat dissipation channel, and a plurality of heat dissipation fins are fixedly connected to the outer wall of the first connecting pipe.
[0011] As a preferred technical solution of this application, the ventilation assembly includes multiple fans fixedly connected to the bottom side wall of the first heat exchange tower, a filter screen fixedly connected to the inner wall of the air inlet end of the top of the air duct, the fans being connected to the air outlet end of the air duct, and a sealing cover being fixedly connected to the outer wall of the bottom wall of the first heat exchange tower, the sealing cover being fixedly connected to the end of the atomizing chamber away from the second heat exchange tower.
[0012] As a preferred technical solution of this application, the cleaning component includes two sets of first sliding frames fixedly connected to the top side wall of the first heat dissipation tower and two sets of second sliding frames fixedly connected to the middle side wall of the first heat dissipation tower. The first and second sliding frames are symmetrically distributed about the central axis of the first sliding frames. A reciprocating screw is rotatably connected to the inner side of the first sliding frame. A transmission rod is fixedly connected to the outer end of the reciprocating screw. A drive blade is fixedly connected to the end of the transmission rod away from the reciprocating screw. The drive blades on both sides are rotatably connected to the inner side of the connecting pipe and the first connecting pipe, respectively. The drive blades are driven to rotate by the flow of coolant inside the first connecting pipe. Two first sliders are slidably connected to the outer side of the first sliding frame. A limit frame is rotatably connected to the side of one of the first sliders near the reciprocating screw. The limit frame is threadedly slidably connected to the outer side of the reciprocating screw. Two second sliders are slidably connected to the outer side of the second sliding frame. A cleaning scraper is fixedly connected to the outer wall of the second slider. The top of the cleaning scraper is fixedly connected to the outer wall of the first slider. The cleaning end of the cleaning scraper is slidably connected to the outer wall of the filter screen.
[0013] As a preferred technical solution of this application, the atomizing component includes a water storage tank fixedly connected to the middle section of the top wall of the atomizing chamber. A second connecting pipe is fixedly connected to the outer wall of one side of the water storage tank. A first delivery pump is fixedly connected to the end of the second connecting pipe away from the water storage tank. Two third connecting pipes are fixedly connected to the liquid outlet end of the first delivery pump. A diverter pipe is fixedly connected to the bottom end of the third connecting pipe. Multiple atomizing nozzles are fixedly connected to the outer wall of the diverter pipe. The spray directions of the atomizing nozzles on both sides are arranged facing each other.
[0014] As a preferred technical solution of this application, the cooling assembly includes an air inlet on the side wall of the second heat dissipation tower near the atomization chamber. Two sealing plates are fixedly connected to the inner side of the second heat dissipation tower. The sealing plates are symmetrically distributed about the central axis of the second heat dissipation tower. A sealing plate is provided on the side of the second heat dissipation tower away from the second delivery pump. A confluence chamber is provided on the side of the second heat dissipation tower near the second delivery pump. Multiple cooling pipes are fixedly connected to the inner side of the sealing plates. The two ends of the cooling pipes are respectively connected to the diversion chamber and the confluence chamber. Multiple guide plates are fixedly connected between the cooling pipes. The guide plates form an S-shaped passage between the cooling pipes. The confluence chamber is connected to the liquid inlet of the second delivery pump.
[0015] As a preferred technical solution of this application, the condensation assembly includes a conveying pipe fixedly connected to the side wall of the second heat dissipation tower away from the atomization chamber. A condenser is fixedly connected to the side of the conveying pipe away from the second heat dissipation tower. The air outlet end of the condenser is connected to the air outlet. A water supply pipe is fixedly connected to the liquid outlet end of the condenser. The end of the water supply pipe away from the conveying pipe is fixedly connected to a water storage tank.
[0016] As a preferred technical solution of this application, an acrylic plate is detachably connected to the top opening of the housing for sealing the top of the housing.
[0017] In the scheme of this application: 1. By incorporating a honeycomb structure inside the cooling components, the thermal management performance of the system is significantly improved. The honeycomb structure increases the contact area between the coolant and the hot surface, thereby improving the heat transfer efficiency. At the same time, it disturbs the liquid flow, enhances convective heat transfer, reduces the fluid boundary layer thickness, and reduces thermal resistance. This allows heat to be transferred from the power devices to the coolant more quickly and evenly, thereby reducing local hot spots and temperature gradients, improving the reliability and service life of the devices. In addition, the honeycomb structure has high mechanical strength, which can support the stable operation of the cooling channels and reduce the flow rate requirements to a certain extent, achieving energy saving and a compact system design. 2. The cooling liquid inside the first heat exchange tower is cooled down by the heat exchange components, and the air is preheated at the same time, which significantly improves the thermal management efficiency of the liquid-cooled power electronic device. At the same time, the preheated air not only helps the heat to be evenly distributed and dissipated, but also allows the excess heat energy to be used for the subsequent heat energy recovery of the system, thereby improving the overall energy utilization efficiency. 3. Atomized water is sprayed into the preheated air through the atomizing component, and the atomized water is carried into the second heat dissipation tower by the hot air. The atomized water adheres to the outer wall of the cooling pipe, and can also be blown onto the surface of the atomized water by the subsequent hot air to accelerate the evaporation of the atomized water, thereby providing secondary cooling for the coolant in the cooling pipe. This composite cooling method combines multiple heat exchange mechanisms of liquid cooling, air flow and atomization evaporation, which not only significantly improves heat dissipation efficiency and temperature uniformity and reduces the risk of local hot spots, but also saves energy, extends the life of devices, and enhances the overall reliability and operational stability of liquid-cooled power electronic devices. 4. By circulating and cooling the coolant, the coolant delivered into the inner side of the distribution channel is always kept at a relatively low temperature. This can continuously and efficiently remove the heat generated by the power devices, reduce the operating temperature of the devices, reduce thermal stress and aging, and at the same time improve the temperature uniformity of the coolant in the distribution channel, avoid local overheating, thereby improving the heat dissipation efficiency, system stability and overall reliability of liquid-cooled power electronic devices, and extending the service life of the devices. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a structural breakdown diagram of the heat-conducting head in this invention; Figure 3 This is a schematic cross-sectional view of the heat-conducting head in this invention. Figure 1 ; Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle; Figure 5 This is a partial three-dimensional structural diagram of the second delivery pump in this invention; Figure 6 This is a schematic cross-sectional view of the heat-conducting head in this invention. Figure 2 ; Figure 7 This is a partial three-dimensional structural diagram of the sealing cap in this invention; Figure 8 yes Figure 7 Enlarged view of a section at point B in the middle; Figure 9 This is a partial three-dimensional structural schematic diagram and enlargement of the reciprocating lead screw in this invention. Figure 1 and magnification Figure 2 ; Figure 10 This is a schematic cross-sectional view of the first heat dissipation tower in this invention. Figure 1 ; Figure 11 This is a schematic cross-sectional view of the first heat dissipation tower in this invention. Figure 2 ; Figure 12 This is a partial three-dimensional structural diagram of the second heat dissipation tower in this invention; Figure 13 This is a partial three-dimensional structural diagram of the first delivery pump in this invention; Figure 14 This is a schematic cross-sectional view of the atomization chamber in this invention; Figure 15 This is a schematic cross-sectional view of the second heat dissipation tower in this invention. Figure 1 ; Figure 16 This is a schematic cross-sectional view of the second heat dissipation tower in this invention. Figure 2 .
[0019] In the diagram: 1. Shell; 11. Air inlet; 12. Air outlet; 13. Component; 14. Heat transfer frame; 2. Heat conduction head; 21. Diverting channel; 22. Displacement head; 23. Merging channel; 24. Connecting pipe; 3. First heat dissipation tower; 31. Air duct; 32. Baffle; 33. Filter; 34. Heat dissipation channel; 35. Fan; 36. Sealing cover; 37. Heat sink; 38. First connecting pipe; 4. First sliding frame; 41. Drive blade; 42. Transmission rod; 43. Reciprocating screw; 44. 45. Limiting frame; 46. Second sliding frame; 47. Second slider; 48. Cleaning scraper; 5. Atomizing chamber; 51. First delivery pump; 52. Second connecting pipe; 53. Water storage tank; 54. Third connecting pipe; 55. Diverter pipe; 56. Atomizing nozzle; 6. Second heat dissipation tower; 61. Air inlet; 62. Sealing plate; 63. Cooling pipe; 64. Diverter chamber; 65. Merging chamber; 66. Guide plate; 7. Delivery pipe; 71. Condenser; 72. Water delivery pipe; 8. Second delivery pump. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] Example: Please see Figure 1-16 This embodiment proposes a liquid-cooled power electronic device, including a housing 1, and further comprising: An air inlet 11 is provided on one side of the outer wall of the housing 1 for air intake into the housing 1; An air outlet 12 is located on the outer wall of the other side of the housing 1 and is used to vent air and circulate the air inside the housing 1. Multiple components 13 are fixedly connected to the middle section of the bottom wall of the housing 1; Multiple heat transfer frames 14 are fixedly connected to the top wall of the element 13. A cooling assembly, located on top of component 13, is used to cool component 13. Connecting pipe 24 is located at the liquid storage end of the cooling component and is used to collect and transport the heated coolant. The first heat dissipation tower 3 is fixedly connected to the inner wall of one side of the shell 1. Its liquid inlet end is fixedly connected to the end of the connecting pipe 24 away from the cooling component. The coolant in the cooling component is transported into the first heat dissipation tower 3 through the connecting pipe 24. The heat exchange component is located inside the first heat dissipation tower 3 and is used to exchange heat between the coolant and the outside air and preheat the outside air. The connecting component is located on the outside of the outlet end of the heat exchange component and is used to output the coolant after heat exchange. An air exchange component is installed inside the first heat exchange tower 3 to extract and transport the air inside the first heat exchange tower 3 after the heat exchange has been completed. Two sets of cleaning components are set on the outer side of the top of the first heat exchange tower 3 and are symmetrically distributed about the central axis of the first heat exchange tower 3, and are used to clean the air inlet end of the air exchange component; Atomizing chamber 5 is fixedly connected to the outside of the air outlet end of the ventilation component; The atomizing component is located inside the atomizing chamber 5 and supplies atomized water into the atomizing chamber 5; The second heat dissipation tower 6 is fixedly connected to the end of the atomizing chamber 5 away from the ventilation component, and its top is connected to the liquid outlet end of the connecting component to transport coolant into the inside of the second heat dissipation tower 6. The cooling component is located inside the second heat dissipation tower 6 and is used for secondary cooling of the coolant. The condensation component is located on the side of the second heat dissipation tower 6 away from the atomization chamber 5. It is used to condense the hot air containing water vapor and reduce the moisture content in the air. Its liquid outlet is connected to the liquid storage end of the atomization component. The second delivery pump 8 is fixedly connected to the outer wall of the second heat dissipation tower 6 near the cooling component, and is used to deliver the cooled coolant back into the cooling component for circulation.
[0022] like Figure 1-16As shown, in a preferred embodiment, based on the above method, the cooling assembly further includes a heat-conducting head 2 detachably connected to the bottom wall of the housing 1. The liquid inlet end of the heat-conducting head 2 is connected to the liquid outlet end of the second delivery pump 8. A diversion channel 21 is opened in the middle section of the inner side of the heat-conducting head 2. Multiple replacement heads 22 are fixedly connected to the inner side of the heat-conducting head 2. The replacement heads 22 are engaged with the heat transfer frame 14. The replacement heads 22 and the heat transfer frame 14 are bonded and heat-conducted by silicone grease (silicone grease is prior art, and can refer to existing commercial silicone grease, which will not be described). The inner side of the heat-conducting head 2 is provided with a honeycomb structure. Merging channels 23 are opened on both sides of the heat-conducting head 2. The merging channels 23 are symmetrically distributed about the central axis of the branching channels 21. The liquid outlet of the merging channels 23 is connected to the liquid inlet of the connecting pipe 24. The cooled coolant is transported into the branching channels 21 by the second delivery pump 8, and the coolant is distributed evenly into the displacement head 22 through the branching channels 21. The honeycomb structure in the displacement head 22 exchanges heat with the coolant entering the displacement head 22, thereby displacing the heat transferred from the element 13 to the heat transfer rack 14, thus cooling the element 13. The heated coolant is then collected through the merging channels 23 and transported into the connecting pipe 24.
[0023] The heat exchange assembly includes a heat dissipation channel 34 located inside the first heat dissipation tower 3 and multiple air ducts 31 located between the heat dissipation channels 34 inside the first heat dissipation tower 3. A baffle 32 is fixedly connected to the middle section of the inner side of the air duct 31. The liquid inlet end of the heat dissipation channel 34 is connected to the liquid outlet end of the connecting pipe 24. After the coolant in the connecting pipe 24 is transported into the heat dissipation channel 34, it flows along the heat dissipation channel 34. During the process, the heat carried in the coolant is exchanged with the air in the air duct 31 through the side wall of the air duct 31, thereby preheating the air in the air duct 31.
[0024] The connecting assembly includes a first connecting pipe 38 fixedly connected to the outer wall of the first heat dissipation tower 3 on the side away from the connecting pipe 24. The first connecting pipe 38 is connected to the liquid outlet end of the heat dissipation channel 34. Multiple heat dissipation fins 37 are fixedly connected to the outer wall of the first connecting pipe 38. The heat dissipation channel 34 and the second heat dissipation tower 6 are connected through the first connecting pipe 38, so that the coolant in the heat dissipation channel 34 can be transported into the second heat dissipation tower 6 through the first connecting pipe 38.
[0025] The ventilation assembly includes multiple fans 35 fixedly connected to the bottom side wall of the first heat exchange tower 3 and a filter 33 fixedly connected to the inner wall of the top air inlet of the air duct 31. The fans 35 are connected to the air outlet of the air duct 31. A sealing cover 36 is fixedly connected to the outer wall of the bottom wall of the first heat exchange tower 3. The sealing cover 36 is fixedly connected to the end of the atomizing chamber 5 away from the second heat exchange tower 6. The fans 35 draw out the air in the air duct 31 after the air is heated and cooled, and deliver the air into the sealing cover 36. The air is collected by the sealing cover 36. At the same time, the air in the housing 1 is drawn out through the top of the air duct 31 to replenish the air duct 31.
[0026] The cleaning assembly includes two sets of first sliding frames 4 fixedly connected to the top side wall of the first heat sink 3, and two sets of second sliding frames 46 fixedly connected to the middle side wall of the first heat sink 3. The first sliding frames 4 and the second sliding frames 46 are symmetrically distributed about the central axis of the first sliding frames 4. A reciprocating screw 43 is rotatably connected to the inner side of the first sliding frame 4. A transmission rod 42 is fixedly connected to the outer end of the reciprocating screw 43. A drive blade 41 is fixedly connected to the end of the transmission rod 42 away from the reciprocating screw 43. The two drive blades 41 are rotatably connected to the inner side of the connecting pipe 24 and the first connecting pipe 38, respectively. When the coolant flows through the inner side of the first connecting pipe 38, it drives the drive blades 41 to rotate. Two first sliders 44 are slidably connected to the outer side of the first sliding frame 4. One of the first sliders 44 is rotatably connected to a limit frame 45 near the reciprocating screw 43. The limit frame 45 is threaded with the outer side of the reciprocating screw 43. The second sliding frame 46 is slidably connected to two second sliders 47. A cleaning scraper 48 is fixedly connected to the outer wall of the second slider 47. The top of the cleaning scraper 48 is fixedly connected to the outer wall of the first slider 44. The cleaning end of the cleaning scraper 48 is slidably connected to the outer wall of the filter screen 33. The coolant flowing through the first connecting pipe 38 and the connecting pipe 24 drives the internal drive blades 41 to rotate. The drive blades 41 drive the reciprocating screw 43 to rotate through the transmission rod 42. The thread on the outer side of the reciprocating screw 43 drives the limiting frame 45 to move. At the same time, the limiting frame 45 drives the first slider 44 to reciprocate outside the first sliding frame 46. The first slider 44 drives the cleaning scraper 48 and the bottom second slider 47 to slide outside the second sliding frame 46, thereby cleaning the outer wall of the filter screen 33 and preventing dust from clogging the filter screen 33.
[0027] The atomizing assembly includes a water tank 53 fixedly connected to the middle section of the top wall of the atomizing chamber 5. The water tank 53 has a water inlet on its side wall, which can replenish water into the water tank 53. A second connecting pipe 52 is fixedly connected to the outer wall of one side of the water tank 53. A first delivery pump 51 is fixedly connected to the end of the second connecting pipe 52 away from the water tank 53. Two third connecting pipes 54 are fixedly connected to the liquid outlet end of the first delivery pump 51. A diversion pipe 55 is fixedly connected to the bottom end of the third connecting pipe 54. Multiple atomizing nozzles 56 are fixedly connected to the outer wall of the diversion pipe 55. The atomizing nozzles 56 on both sides are arranged with their spray directions facing each other. The first delivery pump 51 draws water from the water tank 53 through the second connecting pipe 52, and then delivers the water into the diversion pipe 55 through the third connecting pipe 54, and then diverts it into the atomizing nozzles 56. The atomizing nozzles 56 atomize and spray the water, which mixes with the airflow in the atomizing chamber 5 and is carried by the airflow into the second heat dissipation tower 6.
[0028] The cooling assembly includes an air inlet 61 located on the side wall of the second heat dissipation tower 6 near the atomizing chamber 5. Two sealing plates 62 are fixedly connected to the inner side of the second heat dissipation tower 6, symmetrically distributed about the central axis of the second heat dissipation tower 6. The sealing plates 62 are located on the side of the second heat dissipation tower 6 away from the second delivery pump 8, and a confluence chamber 65 is located on the side of the second heat dissipation tower 6 near the second delivery pump 8. Multiple cooling pipes 63 are fixedly connected to the inner side of the sealing plates 62, with both ends of the cooling pipes 63 connected to the diversion chamber 64 and the confluence chamber 65 respectively. Multiple cooling pipes 63 are fixedly connected to each other. The guide plate 66 forms an S-shaped passage between the cooling pipes 63. The manifold 65 is connected to the liquid inlet of the second delivery pump 8. Air carrying water vapor enters the second heat dissipation tower 6 through the air inlet 61, passes through the cooling pipes 63, and flows towards the condensation component side along the guide plate 66. At the same time, the water vapor in the air adheres to the outer wall of the cooling pipes 63. As the subsequent hot air passes over the water vapor surface on the outside of the cooling pipes 63, the water vapor evaporates. Thus, the heat on the outer wall of the cooling pipes 63 is carried away by the evaporation of water vapor, thereby achieving cooling.
[0029] The condensation assembly includes a delivery pipe 7 fixedly connected to the side wall of the second heat dissipation tower 6 away from the atomization chamber 5. A condenser 71 (the condenser 71 is prior art, referring to existing micro condensers, and will not be described) is fixedly connected to the side of the delivery pipe 7 away from the second heat dissipation tower 6. The air outlet of the condenser 71 is connected to the air outlet 12, and the liquid outlet of the condenser 71 is fixedly connected to the water supply pipe 72. The end of the water supply pipe 72 away from the delivery pipe 7 is fixedly connected to the water storage tank 53. The air is condensed by the condenser 71, and the water vapor in the air is condensed out. The condensate is then returned to the water storage tank 53 by the pump integrated inside the condenser 71, so that the water storage tank 53 can be reused.
[0030] An acrylic plate is detachably connected to the opening at the top of the housing 1 to seal the top of the housing 1. By sealing the top of the housing 1 with the acrylic plate, it is convenient to monitor the operation inside the housing 1 in real time.
[0031] Specifically, when using this liquid-cooled power electronic device: First, during operation, element 13 transfers heat to heat transfer frame 14. Then, the low-temperature coolant in the manifold 65 is drawn by the second delivery pump 8 and delivered into the diversion channel 21. The coolant is then evenly distributed into the four displacement heads 22 on both sides through the diversion channel 21. The displacement heads 22 and the heat transfer frame 14 then exchange heat to the internal honeycomb structure. The honeycomb structure and the coolant exchange heat again. After the coolant is heated, it enters the manifold 23, where it is collected and delivered into the connecting pipe 24 for further transport. The coolant is transported through the connecting pipe 24 into the heat dissipation channel 34 inside the first heat dissipation tower 3, so that the coolant flows along the heat dissipation channel 34 and passes through multiple air ducts 31 before being transported into the first connecting pipe 38. During the flow, the coolant in the heat dissipation channel 34 transfers heat to the side wall of the heat dissipation channel 34 and exchanges heat with the air in the air duct 31, thereby dissipating the heat in the coolant. At the same time, the fan 35 draws air from the air duct 31 and delivers it into the sealing cover 36. At the same time, the top of the air duct 31 draws air from the housing 1 to replenish the air duct 31. During the process, the air is filtered by the filter screen 33. After that, the air in the sealing cover 36 is delivered into the atomizing chamber 5. During the process, the coolant flowing in the connecting pipe 24 and the first connecting pipe 38 drives the drive blade 41 to rotate within the connecting pipe 24 and the first connecting pipe 38. At the same time, the drive blade 41 drives the reciprocating screw 43 to rotate inside the first sliding frame 4 via the transmission rod 42. The thread on the outside of the reciprocating screw 43 drives the limiting frame 45, and the limiting frame 45 drives the first slider 44 on one side to reciprocate outside the first sliding frame 4. Thus, the first slider 44 drives the outer cleaning scraper 48 and the second slider 47 to reciprocate along the first sliding frame 4 and the second sliding frame 46, thereby cleaning the outer wall of the filter screen 33 through the cleaning scraper 48. The coolant delivered from the heat dissipation channel 34 is transported into the distribution chamber 64 through the first connecting pipe 38, and then distributed into the cooling pipes 63 and into the confluence chamber 65. At the same time, the first delivery pump 51 draws water from the water storage tank 53 through the second connecting pipe 52, and then delivers the water into the distribution pipe 55 through the third connecting pipe 54. The water is then evenly distributed into the atomizing nozzle 56, and the atomizing nozzle 56 sprays the water into the airflow entering the atomizing chamber 5. The airflow carrying water vapor enters the interior of the second heat dissipation tower 6 through the air inlet 61 and flows through the gaps between the cooling pipes 63. At the same time, the airflow is guided by the guide plate 66, so that the airflow flows towards the delivery pipe 7 along the guide plate 66. Meanwhile, the water vapor in the air entering the second heat dissipation tower 6 will adhere to the outer wall of the cooling pipe 63, and the water vapor will evaporate as the subsequent hot air passes over the surface of the water vapor, thereby absorbing the heat of the outer wall of the cooling pipe 63 and cooling the coolant inside the cooling pipe 63. The air carrying water vapor enters the condenser 71 through the delivery pipe 7 for condensation, separating the water in the air, and the condensate is transported back to the water storage tank 53 for reuse by the pump integrated in the condenser 71. The coolant cooled in the manifold 65 is flushed and pumped back into the branch channel 21 by the second delivery pump 8 for reuse.
[0032] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A liquid-cooled power electronic device, comprising a housing (1), characterized in that, Also includes: An air inlet (11) is provided on one side of the outer wall of the housing (1) for air intake inside the housing (1); An air outlet (12) is located on the outer wall of the other side of the housing (1) to allow air to circulate inside the housing (1). Multiple components (13) are fixedly connected to the middle section of the bottom wall of the housing (1); Multiple heat transfer racks (14) are fixedly connected to the top wall of the component (13). A cooling assembly is disposed on top of component (13) for cooling component (13); The connecting pipe (24) is located at the liquid storage end of the cooling component and is used to collect and transport the heated coolant. The first heat dissipation tower (3) is fixedly connected to the inner wall of one side of the shell (1). Its liquid inlet end is fixedly connected to the end of the connecting pipe (24) away from the cooling component. The coolant in the cooling component is transported into the first heat dissipation tower (3) through the connecting pipe (24). The heat exchange component is located inside the first heat dissipation tower (3) and is used to exchange heat between the coolant and the outside air and to preheat the outside air. The connecting component is located on the outside of the outlet end of the heat exchange component and is used to output the coolant after heat exchange. An air exchange component is installed inside the first heat exchange tower (3) to extract and transport the air after the heat exchange inside the first heat exchange tower (3); Two sets of cleaning components are set on the outer side of the top of the first heat exchange tower (3) and are symmetrically distributed about the central axis of the first heat exchange tower (3) for cleaning the air inlet of the air exchange component; The atomizing chamber (5) is fixedly connected to the outside of the air outlet of the ventilation assembly; The atomizing component is located inside the atomizing chamber (5) and delivers atomized water into the atomizing chamber (5); The second heat dissipation tower (6) is fixedly connected to the end of the atomizing chamber (5) away from the ventilation component. Its top is connected to the liquid outlet end of the connecting component to transport the coolant into the inside of the second heat dissipation tower (6). The cooling component is located inside the second heat dissipation tower (6) and is used to cool the coolant in a secondary manner. The condensing component is located on the side of the second heat dissipation tower (6) away from the atomizing chamber (5) and is used to condense the hot air containing water vapor to reduce the moisture content in the air. Its liquid outlet is connected to the liquid storage end of the atomizing component. The second delivery pump (8) is fixedly connected to the outer wall of the second heat sink (6) near the cooling component, and is used to deliver the cooled coolant back into the cooling component for circulation.
2. A liquid-cooled power electronic device according to claim 1, characterized in that, The cooling assembly includes a heat-conducting head (2) detachably connected to the bottom wall of the housing (1). The liquid inlet of the heat-conducting head (2) is connected to the liquid outlet of the second delivery pump (8). A diversion channel (21) is provided in the middle section of the inner side of the heat-conducting head (2). Multiple replacement heads (22) are fixedly connected to the inner side of the heat-conducting head (2). The replacement heads (22) are engaged with the heat transfer frame (14). A honeycomb structure is provided on the inner side of the replacement heads (22). A confluence channel (23) is provided inside both sides of the heat-conducting head (2). The confluence channel (23) is symmetrically distributed about the central axis of the diversion channel (21). The liquid outlet of the confluence channel (23) is connected to the liquid inlet of the connecting pipe (24).
3. A liquid-cooled power electronic device according to claim 1, characterized in that, The heat exchange assembly includes a heat dissipation channel (34) opened inside the first heat dissipation tower (3) and multiple air ducts (31) opened inside the first heat dissipation tower (3) between the heat dissipation channels (34). A partition plate (32) is fixedly connected to the middle section of the inner side of the air duct (31). The liquid inlet end of the heat dissipation channel (34) is connected to the liquid outlet end of the connecting pipe (24).
4. A liquid-cooled power electronic device according to claim 1, characterized in that, The connecting assembly includes a first connecting pipe (38) fixedly connected to the outer wall of the first heat dissipation tower (3) on the side away from the connecting pipe (24). The first connecting pipe (38) is connected to the liquid outlet end of the heat dissipation channel (34). A plurality of heat dissipation fins (37) are fixedly connected to the outer wall of the first connecting pipe (38).
5. A liquid-cooled power electronic device according to claim 1, characterized in that, The ventilation assembly includes multiple fans (35) fixedly connected to the bottom side wall of the first heat exchange tower (3) and a filter (33) fixedly connected to the inner wall of the top air inlet of the air duct (31). The fans (35) are connected to the air outlet of the air duct (31). A sealing cover (36) is fixedly connected to the outer wall of the bottom wall of the first heat exchange tower (3). The sealing cover (36) is fixedly connected to the end of the atomizing chamber (5) away from the second heat exchange tower (6).
6. A liquid-cooled power electronic device according to claim 1, characterized in that, The cleaning assembly includes two sets of first sliding frames (4) fixedly connected to the top side wall of the first heat sink (3) and two sets of second sliding frames (46) fixedly connected to the middle side wall of the first heat sink (3). The first sliding frames (4) and the second sliding frames (46) are symmetrically distributed about the central axis of the first sliding frames (4). A reciprocating screw (43) is rotatably connected to the inner side of the first sliding frame (4). A transmission rod (42) is fixedly connected to the outer end of the reciprocating screw (43). A drive blade (41) is fixedly connected to the end of the transmission rod (42) away from the reciprocating screw (43). The drive blades (41) on both sides are rotatably connected to the inner side of the connecting pipe (24) and the first connecting pipe (38), respectively. When the coolant flows inside the connecting pipe (38), it drives the drive blade (41) to rotate. Two first sliders (44) are slidably connected to the outside of the first sliding frame (4). One side of the first slider (44) is rotatably connected to the limit frame (45) near the reciprocating screw (43). The limit frame (45) is threadedly slidably connected to the outside of the reciprocating screw (43). Two second sliders (47) are slidably connected to the outside of the second sliding frame (46). A cleaning scraper (48) is fixedly connected to the outer wall of the second slider (47). The top of the cleaning scraper (48) is fixedly connected to the outer wall of the first slider (44). The cleaning end of the cleaning scraper (48) is slidably connected to the outer wall of the filter screen (33).
7. A liquid-cooled power electronic device according to claim 1, characterized in that, The atomizing assembly includes a water tank (53) fixedly connected to the middle section of the top wall of the atomizing chamber (5). A second connecting pipe (52) is fixedly connected to the outer wall of one side of the water tank (53). A first delivery pump (51) is fixedly connected to the end of the second connecting pipe (52) away from the water tank (53). Two third connecting pipes (54) are fixedly connected to the liquid outlet end of the first delivery pump (51). A diversion pipe (55) is fixedly connected to the bottom end of the third connecting pipe (54). A plurality of atomizing nozzles (56) are fixedly connected to the outer wall of the diversion pipe (55). The atomizing nozzles (56) on both sides are arranged with their spray directions facing each other.
8. A liquid-cooled power electronic device according to claim 1, characterized in that, The cooling assembly includes an air inlet (61) on the side wall of the second heat dissipation tower (6) near the atomizing chamber (5). Two sealing plates (62) are fixedly connected to the inner side of the second heat dissipation tower (6). The sealing plates (62) are symmetrically distributed about the central axis of the second heat dissipation tower (6). The sealing plates (62) are provided on the side of the second heat dissipation tower (6) away from the second delivery pump (8). A confluence chamber (65) is provided on the side of the second heat dissipation tower (6) near the second delivery pump (8). Multiple cooling pipes (63) are fixedly connected to the inner side of the sealing plates (62). The two ends of the cooling pipes (63) are connected to the diversion chamber (64) and the confluence chamber (65) respectively. Multiple guide plates (66) are fixedly connected between the cooling pipes (63). The guide plates (66) form an S-shaped passage between the cooling pipes (63). The confluence chamber (65) is connected to the liquid inlet of the second delivery pump (8).
9. A liquid-cooled power electronic device according to claim 4, characterized in that, The condensation assembly includes a delivery pipe (7) fixedly connected to the side wall of the second heat dissipation tower (6) away from the atomization chamber (5). A condenser (71) is fixedly connected to the side of the delivery pipe (7) away from the second heat dissipation tower (6). The air outlet of the condenser (71) is connected to the air outlet (12). A water supply pipe (72) is fixedly connected to the liquid outlet of the condenser (71). The end of the water supply pipe (72) away from the delivery pipe (7) is fixedly connected to the water storage tank (53).
10. A liquid-cooled power electronic device according to claim 9, characterized in that, An acrylic plate is detachably connected to the top opening of the housing (1) for sealing the top of the housing (1).