CN209882385U - Water-cooling heat dissipation power module based on bolted connection - Google Patents
Water-cooling heat dissipation power module based on bolted connection Download PDFInfo
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- CN209882385U CN209882385U CN201920072021.2U CN201920072021U CN209882385U CN 209882385 U CN209882385 U CN 209882385U CN 201920072021 U CN201920072021 U CN 201920072021U CN 209882385 U CN209882385 U CN 209882385U
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- 238000001816 cooling Methods 0.000 title claims abstract description 62
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000002955 isolation Methods 0.000 claims abstract description 32
- 238000003466 welding Methods 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000110 cooling liquid Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The utility model discloses a water-cooling heat dissipation power module based on bolted connection, which comprises a frame component, a water-cooling plate component, a first mounting plate, a second mounting plate, a third mounting plate and a fourth mounting plate, wherein the first mounting plate, the second mounting plate, the third mounting plate and the fourth mounting plate are used for mounting power devices; the water cooling plate assembly is horizontally and detachably arranged in the frame assembly, and the first mounting plate is positioned above the frame assembly and is vertically connected with the water cooling plate assembly; the second mounting plate is detachably fixed above the water cooling plate assembly through a vertically arranged thin isolation column; the third mounting plate is detachably fixed below the water-cooling plate assembly through a thick isolation column; the left side of the fourth mounting plate is hinged to the left side longitudinal beam of the frame assembly through a hinge, and the right side of the fourth mounting plate is detachably fixed to the right side longitudinal beam of the frame assembly through a bolt, so that the fourth mounting plate can be opened on the side face of the frame assembly in a rotating mode. The utility model discloses make things convenient for the installation of each electric part, product compact structure, the integrated level is high, is convenient for assemble and maintain.
Description
Technical Field
The utility model belongs to the technical field of power module for the track traffic, especially, relate to a water-cooling heat dissipation power module.
Background
In a railway vehicle, a power module is composed of electric parts such as an IGBT (insulated gate bipolar transistor), a diode, a supporting capacitor, a current sensor, a controller and a driving plate, a frame, a mounting plate, a radiator and the like which play a role in mechanical fixing, and can realize integration of specific electric functions. The existing module frame is generally formed by welding square pipes or plates, the frame in the form has the defect of relatively large welding deformation, and the welding seams at the corners of the frame possibly have the risk of insufficient strength due to stress concentration, so that the frame has poor dimensional accuracy controllability and low reliability.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve above-mentioned technical problem, provide a water-cooling heat dissipation power module based on bolted connection, adopt bolted connection's frame construction, be applied to water-cooling heat dissipation's power module, can make things convenient for the installation of each electric part, product compact structure, the integrated level is high, is convenient for assemble and maintain.
The technical scheme of the utility model as follows:
a water-cooling heat dissipation power module based on bolt connection comprises a frame assembly, a water-cooling plate assembly, a first mounting plate, a second mounting plate, a third mounting plate and a fourth mounting plate, wherein the first mounting plate, the second mounting plate, the third mounting plate and the fourth mounting plate are used for mounting power devices; the water cooling plate assembly is horizontally and detachably arranged in the frame assembly, and the first mounting plate is positioned above the frame assembly and is vertically connected with the water cooling plate assembly; the second mounting plate is detachably fixed above the water cooling plate assembly through a vertically arranged thin isolation column; the third mounting plate is detachably fixed below the water-cooling plate assembly through a thick isolation column; the left side of the fourth mounting plate is hinged to the left side longitudinal beam of the frame assembly through a hinge, and the right side of the fourth mounting plate is detachably fixed to the right side longitudinal beam of the frame assembly through a bolt, so that the fourth mounting plate can be opened on the side face of the frame assembly in a rotating mode.
Preferably, the cross section of the thin isolation column is hexagonal, a threaded hole is formed in one end of the thin isolation column, a cylinder is arranged at the other end of the thin isolation column, and external threads are tapped on the cylinder.
Preferably, the coarse isolation column is cylindrical, a threaded hole is formed in the end face of the coarse isolation column, a flattened platform notch is machined in the side wall of each end provided with the threaded hole, and the stud is screwed into the threaded hole of the coarse isolation column.
Preferably, the frame assembly comprises a square pipe, a three-way joint, a T-shaped joint, a bolt assembly, an L-shaped fixing plate, a handle and a long screw assembly; every three square pipes are connected together through a tee joint to form a frame vertex angle structure which is mutually perpendicular, and the T-shaped joints and the bolt assemblies form a frame by combining corresponding frame vertex angle structures through rectangular pipes.
Furthermore, the left side and the right side in front of the frame assembly are respectively provided with the L-shaped fixing plates, each L-shaped fixing plate is provided with two holes, wherein 1 hole is used for fixing the front lower part of the frame, and the other 1 hole is used for fixing the module and the whole machine.
Further, a handle facilitating the push-pull operation of the module is arranged at the front lower part of the module.
Further, the long screw assembly comprises a nut, a rubber pad, a double nut and elastic pad combination, a spring washer and a long screw; the nut positioned at the leftmost side is firmly welded with the end part of the long screw rod, the double nut close to the nut at the leftmost side and the elastic cushion are combined into a pre-assembled assembly part and are in threaded fit on the long screw rod, the screw rod between the nut at the leftmost side and the assembly part penetrates through the rectangular tube of the frame assembly, and the rubber cushion is clamped between the nut at the leftmost side and the rectangular tube opposite to the nut at the leftmost side; and a pre-assembly part which is also combined by double nuts and elastic cushions is in threaded fit at the position of the long screw rod close to the other end, and the spring washer is clamped between the pre-assembly part and the inner side wall of the rectangular tube of the frame assembly which is penetrated by the other end of the long screw rod.
Furthermore, after the spring washer is pressed, the rubber pad just fills the gap between the nut and the frame at the position of the welding bolt and provides certain elastic force.
Further, the rear fixing plate is provided with a threaded hole which is aligned with the long screw rod and used for fixing the rear part of the module; the bottom of the module is provided with two bilaterally symmetrical slideways to limit the left and right movement in the pushing process and simultaneously ensure that the long screw can be aligned with the fixing hole of the rear fixing plate.
Preferably, the water cooling plate assembly comprises a water cooling plate, an IGBT, a large resistor, a transformer, an inductor, a small resistor assembly, a diode and a water cooling plate; the heating device, the IGBT, the large resistor, the transformer, the inductor, the small resistor assembly and the diode are fixed on the upper side and the lower side of the water cooling plate; the inside of the water cooling plate is provided with a flow channel, so that when cooling liquid flows through the flow channel, the heat transferred to the water cooling plate by the corresponding heating device is taken away in a convection heat exchange mode.
The utility model has the advantages that: the present case is applied to water-cooling power module with bolted connection's frame construction, the not high problem of traditional welding frame structure size precision that has both solved has reached module product compact structure again, the integrated level is high, operation maintenance convenient advantage.
Drawings
Fig. 1 and fig. 2 are schematic structural diagrams of the present invention.
FIG. 3 is a schematic view of a fine isolation column structure.
FIG. 4 is a schematic view of a coarse isolation column structure.
Fig. 5 is a schematic view of a frame assembly.
FIG. 6 is a schematic diagram of the rectangular tube and the tee joint disassembled.
FIG. 7 is a schematic view of a T-junction.
Fig. 8 is a schematic structural view of a long screw assembly.
Fig. 9 is a schematic view of the long screw assembly in position with the module installed.
Fig. 10 is a schematic structural view of the long screw assembly when the module is disassembled.
Fig. 11 is a schematic view of the assembly of the module in the complete machine.
Fig. 12 and 13 are schematic views of a water cooled plate assembly.
FIG. 14 is a schematic view of the flow of the cooling liquid through the water-cooled plate.
Fig. 15 is a schematic diagram of a resistor assembly.
Element number description: the water cooling plate comprises a frame assembly 1, a water cooling plate assembly 2, a first mounting plate 3, a second mounting plate 4, a third mounting plate 5, a thick isolation column 6, a thin isolation column 7, screws and gaskets 8, countersunk screws 9, a fourth mounting plate 10, hinges 11, square tubes 1-1, tee joints 1-2, T-shaped joints 1-3, bolt assemblies 1-4, L-shaped fixing plates 1-5, handles 1-6, long screw rod assemblies 1-7, nuts 1-7-1, rubber pads 1-7-2, double nut and elastic pad assemblies 1-7-3, double nut and elastic pad assemblies 1-7-4, spring gaskets 1-7-5, long screw rods 1-7-6, frame square tubes 1-7-7, water cooling plates 2-1, IGBTs 2-2, IGBT (insulated gate bipolar translator) 2, thin isolation columns 7, water cooling plates 2, 2-3 parts of IGBT, 2-4 parts of large resistor, 2-5 parts of quick water connector, 2-6 parts of transformer, 2-7 parts of inductor, 2-8 parts of small resistor component, 2-9 parts of diode, a gap a, a small resistor b, a resistor mounting plate c, a fixing plate d, a slideway f and a fixing hole d0 of the fixing plate.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
The invention will be further explained with reference to the following figures and examples:
a water-cooling heat dissipation power module based on bolt connection is shown in figures 1-2, and mainly comprises a frame assembly 1, a water-cooling plate assembly 2, a first mounting plate 3, a second mounting plate 4, a third mounting plate 5 and a fourth mounting plate 10. The water cooling plate assembly 2 is fixed on the frame assembly 1 by screws and gaskets 8; the first mounting plate 3 is fixed on the water cooling plate assembly 2 and the frame assembly 1 by adopting countersunk head screws 9, screws and gaskets 8; the second mounting plate 4 is fixed above the water cooling plate assembly 2 by adopting a thin isolation column 7 and a corresponding fastener; the third mounting plate 5 is fixed below the water cooling plate assembly 2 by adopting a thick isolation column 6 and corresponding fasteners; the hinge 11 is adopted on the left side of the fourth mounting plate 10, the bolt and the gasket are adopted on the right side for fixing, and the rotating structure is favorable for opening and maintaining the devices inside the observation module.
The four mounting plates are respectively used for mounting various electric devices, such as a controller, a current sensor, a low-voltage sensor, an EMI filter and the like, wherein the structural schematic diagrams of the isolation columns used by the second mounting plate 4 and the third mounting plate 5 are shown in figures 3-4, the second mounting plate 4 can adopt a relatively thin hexagonal isolation column shown in figure 3 due to light weight, the isolation column is made of stainless steel or carbon steel, one end of the isolation column is provided with an internal thread, and the other end of the isolation column is provided with an external thread; the third mounting plate 5 is heavy, and can adopt a relatively thick round isolation column as shown in fig. 4, the thick isolation column 6 is made of 6 series aluminum alloy with good strength and light weight, and is matched with a stud bolt made of stainless steel or carbon steel for use together. When the isolating column is used, external threads are required to be screwed into threaded holes in the water cooling plate assembly 2.
Specifically, the structural schematic diagram of the frame assembly 1 in the embodiment is shown in fig. 5, and the frame assembly mainly comprises a square pipe 1-1, a three-way joint 1-2, a T-shaped joint 1-3, a bolt assembly 1-4, an L-shaped fixing plate 1-5, a handle 1-6 and a long screw assembly 1-7-4. The square pipe 1-1 forms a frame through the combination of a three-way joint 1-2 (shown in figure 6), a T-shaped joint 1-3 (shown in figure 7) and a bolt component 1-4, and the frame is combined in a socket joint manner and is fixed through the bolt component as shown in figure 6. The surface of the square pipe 1-1 can be provided with a threaded hole, generally a blind rivet nut 1-7-1 or a through hole for fixing other parts. The left side and the right side in front of the frame component 1 are respectively provided with an L-shaped fixing plate 1-5, the L-shaped fixing plates 1-5 are provided with two holes, wherein 1 hole is used for fixing the front lower part of the frame, and the other 1 hole is used for fixing the module and the whole machine. The front lower part of the module is also provided with handles 1-6 to facilitate the push-pull operation of the module. The structure of the long screw rod assembly 1-7-4 of the embodiment is shown in fig. 8-10, and the fixing of the rear side of the module can be realized by operating in front of the module; the specific fixing mode of the module to the whole machine is shown in figure 11, during assembly, the module is pushed into the whole machine along the slide way, and after the module is pushed in place, the bolts at the round holes at the lower parts of the long screw rods 1-7-6 and the L-shaped fixing plates 1-5 are screwed down from the front side.
In the long screw rod assembly, the leftmost nut 1-7-1 is firmly welded with the long screw rod 1-7-6, and during assembly, the torsion is transmitted to the tip of the long screw rod 1-7-6 through the left nut 1-7-1; the double nuts 1-7-1 and the elastic cushion assemblies 1-7-3 are assembly parts and are mainly used for preventing the screw components from falling off from the module components after the module is disassembled. The double nuts 1-7-1 and the elastic cushion combinations 1-7-4 are also assembly parts and mainly used for pressing the modules in place; the function of the spring washer 1-7-5 is to play a role of screw rod anti-loosing after the module assembly is assembled. In addition, the rubber pads 1-7-2 have good elasticity, when the spring washers 1-7-5 are pressed tightly, a certain gap exists between the welding bolt part and the frame, and the rubber pads 1-7-2 can just fill the gap and provide certain elasticity to prevent the head parts of the long screws 1-7-6 from shaking. The end part of the long screw rod 1-7-61-7-6 is designed with a chamfer to play a guiding role.
In the whole machine, as shown in fig. 11, a module rear fixing plate d is provided with a threaded hole aligned with the long screw rods 1-7-6 for fixing the rear part of the module; the bottom of the module is provided with a left slideway f and a right slideway f which are made of non-metal materials with smaller friction coefficient, such as nylon, and are used for limiting the left and right movement in the pushing process and simultaneously ensuring that the long screws 1-7-6 can be aligned with the fixing holes d0 of the rear fixing plate.
In specific implementation, the water-cooled plate assembly 2 is shown in fig. 12-13 and mainly comprises a water-cooled plate 2-1, IGBTs (a first IGBT 2-2 and a second IGBT 2-3), a large resistor 2-4, a transformer 2-6, an inductor 2-7, a small resistor assembly 2-8, diodes 2-9 and the like. The IGBT, the large resistor 2-4, the transformer 2-6, the inductor 2-7, the small resistor component 2-8, the diode 2-9 and the like are heating devices which are fixed on the upper side and the lower side of the water cooling plate 2-1, and the surface space of the radiator is fully utilized. The working principle of the water cooling plate 2-1 is as follows: the flow channel is arranged in the water cooling plate 2-1, and when cooling liquid (generally a mixture of pure water and ethylene glycol) flows through the flow channel, heat transmitted to the water cooling plate 2-1 by the heating device is taken away in a convection heat exchange mode. Therefore, the heating devices should be reasonably arranged, so that the situation that the smoothness of the internal flow channel is affected due to disorder of fixing holes of the devices is avoided, and as shown in fig. 12 to 14, the devices should be arranged as orderly as possible, and the smoothness of the flow channel is ensured. The surface of the water cooling plate 2-1 is required to meet the installation requirements of corresponding devices, and corresponding fixing holes are specially arranged for fixing the corresponding devices. Here, in order to solve the installation problem of the small device (such as the small resistor), the method of fig. 15 is adopted, the small resistor b is firstly fixed on the slightly larger installation plate (the resistor installation plate c), then the whole assembly is fixed on the surface of the water-cooling plate 2-1, and only 4 fixing holes of the resistor assembly on the water-cooling plate 2-1 are provided to ensure the smoothness of the flow channel.
Based on the above embodiments, the frame assembly (frame) of the present invention adopts a bolt connection form, and a relative welding form is more favorable for controlling the product size precision and improving the frame reliability; and a series of devices that generate heat all install in the water-cooling plate surface, and all the other electric parts are fixed in on the mounting panel, and the mounting panel subassembly can be directly fixed in on the side pipe (set up the rivet nut on the side pipe), and accessible insulated column is fixed in the water-cooling plate surface, also can design as the revolution mechanic of "hinge + bolt fastening", and the product design thinking is very clear and definite, and product maintainability is good.
And, in order to strengthen the effect, the utility model discloses a thick, two kinds of insulated columns of thin are applied to respectively the fixed of lighter and heavier mounting panel, simple to operate.
The utility model discloses the module adopts the long screw rod structure to fix convenient operation through the front side to the module rear portion. The combined design mode of the slide way and the long screw rod is that the slide way is made of a material with a low friction coefficient, so that the module can be conveniently pushed and pulled, the slide way simultaneously plays a role in limiting left and right, and the long screw rod is conveniently aligned with a fixing hole at the rear side of the whole machine.
The utility model discloses the device that generates heat is put to both sides equipartition about the water-cooling board subassembly, but make full use of water-cooling board's heat dispersion, product compact structure, the integrated level is high. The water cooling plate assembly is provided with the quick water connector, so that when the water connector is pulled out, liquid in the water cooling plate cannot leak, and the product maintainability is high.
The utility model discloses to the less device that generates heat of volume, designed the mounting panel that plays excessive effect, the unblocked design of easy water-cooling plate runner, in addition, the handle has still been designed to the module front end, does benefit to the maintenance of product.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a water-cooling heat dissipation power module based on bolted connection which characterized in that: the water cooling device comprises a frame assembly, a water cooling plate assembly, a first mounting plate, a second mounting plate, a third mounting plate and a fourth mounting plate, wherein the first mounting plate, the second mounting plate, the third mounting plate and the fourth mounting plate are used for mounting power devices; the water cooling plate assembly is horizontally and detachably arranged in the frame assembly, and the first mounting plate is positioned above the frame assembly and is vertically connected with the water cooling plate assembly; the second mounting plate is detachably fixed above the water cooling plate assembly through a vertically arranged thin isolation column; the third mounting plate is detachably fixed below the water-cooling plate assembly through a thick isolation column; the left side of the fourth mounting plate is hinged to the left side longitudinal beam of the frame assembly through a hinge, and the right side of the fourth mounting plate is detachably fixed to the right side longitudinal beam of the frame assembly through a bolt, so that the fourth mounting plate can be opened on the side face of the frame assembly in a rotating mode.
2. The bolted connection-based water-cooled heat dissipation power module of claim 1, wherein: the cross section of the thin isolation column is hexagonal, a threaded hole is formed in one end of the thin isolation column, a cylinder is arranged at the other end of the thin isolation column, and external threads are tapped on the cylinder.
3. The bolted connection-based water-cooled heat dissipation power module of claim 1, wherein: the coarse isolation column is cylindrical, a threaded hole is formed in the end face of the coarse isolation column, a flattened platform notch is machined in the side wall of each end provided with the threaded hole, and the stud is screwed into the threaded hole of the coarse isolation column.
4. The bolted connection-based water-cooled heat dissipation power module of claim 1, wherein: the frame assembly comprises a square tube, a three-way joint, a T-shaped joint, a bolt assembly, an L-shaped fixing plate, a handle and a long screw rod assembly; every three square pipes are connected together through a tee joint to form a frame vertex angle structure which is mutually perpendicular, and the T-shaped joints and the bolt assemblies form a frame by combining corresponding frame vertex angle structures through rectangular pipes.
5. The bolted connection-based water-cooled heat dissipation power module of claim 4, wherein: the left side and the right side in front of the frame assembly are respectively provided with the L-shaped fixing plates, the L-shaped fixing plates are provided with two holes, wherein 1 hole is used for fixing the front lower part of the frame, and the other 1 hole is used for fixing the module and the whole machine.
6. The bolted connection-based water-cooled heat dissipation power module of claim 4, wherein: a handle which is convenient for the push-pull operation of the module is arranged at the front lower part of the module.
7. The bolted connection-based water-cooled heat dissipation power module of claim 4, wherein: the long screw assembly comprises a nut, a rubber pad, a double-nut and elastic pad combination, a spring washer and a long screw; the nut positioned at the leftmost side is firmly welded with the end part of the long screw rod, the double nut close to the nut at the leftmost side and the elastic cushion are combined into a pre-assembled assembly part and are in threaded fit on the long screw rod, the screw rod between the nut at the leftmost side and the assembly part penetrates through the rectangular tube of the frame assembly, and the rubber cushion is clamped between the nut at the leftmost side and the rectangular tube opposite to the nut at the leftmost side; and a pre-assembly part which is also combined by double nuts and elastic cushions is in threaded fit at the position of the long screw rod close to the other end, and the spring washer is clamped between the pre-assembly part and the inner side wall of the rectangular tube of the frame assembly which is penetrated by the other end of the long screw rod.
8. The bolted connection-based water-cooled heat dissipation power module of claim 7, wherein: after the rubber gasket is tightly pressed, the rubber gasket just fills the gap between the nut and the frame at the position of the welding bolt and provides certain elasticity.
9. The bolted connection-based water-cooled heat dissipation power module of claim 7, wherein: the rear fixing plate is provided with a threaded hole which is aligned with the long screw rod and used for fixing the rear part of the module; the bottom of the module is provided with two bilaterally symmetrical slideways to limit the left and right movement in the pushing process and simultaneously ensure that the long screw can be aligned with the fixing hole of the rear fixing plate.
10. The bolted connection-based water-cooled heat dissipation power module of claim 1, wherein: the water cooling plate assembly comprises a water cooling plate, an IGBT, a large resistor, a transformer, an inductor, a small resistor assembly, a diode and a water cooling plate; wherein, the device generates heat: the IGBT, the large resistor, the transformer, the inductor, the small resistor assembly and the diode are fixed on the upper side and the lower side of the water-cooling plate; the inside of the water cooling plate is provided with a flow channel, so that when cooling liquid flows through the flow channel, the heat transferred to the water cooling plate by the corresponding heating device is taken away in a convection heat exchange mode.
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CN201920072021.2U CN209882385U (en) | 2019-01-16 | 2019-01-16 | Water-cooling heat dissipation power module based on bolted connection |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109714928A (en) * | 2019-01-16 | 2019-05-03 | 重庆中车四方所科技有限公司 | One kind being based on bolted water cooling power module |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109714928A (en) * | 2019-01-16 | 2019-05-03 | 重庆中车四方所科技有限公司 | One kind being based on bolted water cooling power module |
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Effective date of registration: 20231214 Address after: 401133 No. 39, Changmei Road, fish mouth town, Jiangbei District, Chongqing Patentee after: CHONGQING CRRC SIFANG INSTITUTE INTELLIGENT EQUIPMENT TECHNOLOGY Co.,Ltd. Address before: No.146, Dongfeng Road, Yuzui Town, Jiangbei District, Chongqing Patentee before: CHONGQING CRRC SIFANG INSTITUTE TECHNOLOGY CO.,LTD. |
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