CN113242677B - DC/DC power module overheat protection device - Google Patents
DC/DC power module overheat protection device Download PDFInfo
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- CN113242677B CN113242677B CN202110549533.5A CN202110549533A CN113242677B CN 113242677 B CN113242677 B CN 113242677B CN 202110549533 A CN202110549533 A CN 202110549533A CN 113242677 B CN113242677 B CN 113242677B
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- heat
- power module
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- power
- power supply
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
- H05K7/20918—Forced ventilation, e.g. on heat dissipaters coupled to components the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/209—Heat transfer by conduction from internal heat source to heat radiating structure
Abstract
The invention discloses an overheat protection device for a DC/DC power supply module, which specifically comprises: power embedding mechanism, this power embedding mechanism have square main part, and install the protection mechanism of square main part surface, and install the cross mount at protection mechanism top, power embedding mechanism includes: the invention relates to the technical field of DC/DC power supply modules, in particular to an embedded block which is provided with a square column body, an embedded groove formed in the top of the square column body, a fixing mechanism arranged in the inner cavity of the embedded groove, a pin hole formed in the bottom of the inner cavity of the embedded groove, a guide piece arranged on the inner surface of the pin hole, and a cross through groove formed in the middle lower position of the embedded block. The power module is provided with initial protection capability through the design of the protection mechanism, the power module is not prevented from being directly contacted with air, the rate of self oxidation caused by the generation of heat when the power module is used is reduced, and the service life of the power module is prolonged.
Description
Technical Field
The invention relates to the technical field of DC/DC power supply modules, in particular to an overheat protection device of a DC/DC power supply module.
Background
The power module is an electronic device widely applied in the current electrical equipment, and the heat productivity of the power module is higher and higher under the large trend of high power of the power module, so that a special device is needed to lead out the heat of the power module in time so as to improve the stability of operation.
According to chinese patent CN212063849U, including heating panel and holder, a plurality of fin are installed to the heating panel on a side, and the heating panel rotates the installation holder respectively on two sides adjacent with the side that has the fin simultaneously, and this holder can be opened and cliied power module under the exogenic action, makes power module and heating panel closely laminate together, improves power module's radiating efficiency. Because the utility model discloses well protection device all links together, consequently need not deposit alone and install each spare part, and the availability factor improves greatly. In the use, power module direct mount is in the air, and self during operation heat can lead to power module self to accelerate the oxidation in the air, reduces power module's life.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an overheat protection device for a DC/DC power supply module, which solves the problems that the power supply module is directly arranged in the air in the use process, and the heat of the power supply module can accelerate the oxidation of the power supply module in the air when the power supply module works, so that the service life of the power supply module is shortened.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: an overheat protection device for a DC/DC power supply module specifically comprises:
power embedding mechanism, this power embedding mechanism have square main part, and install the protection machanism of square main part surface, and install the cross mount at protection machanism top provides initial protective capability to power module through protection machanism's design, does not exempt from power module and directly contacts with the air, and the thermal production is to the speed of self oxidation when reducing power module uses, prolongs power module's life, and the setting of cross mount has made things convenient for getting of whole device and installation simultaneously, carries out initial dust simultaneously and blocks, reduces the contact rate of dust and equipment, power embedding mechanism includes:
the embedded block is provided with a square cylinder and an embedded groove at the top of the square cylinder, the embedded groove is arranged on the top of the square cylinder, the fixed mechanism is arranged in the embedded groove inner cavity, the pin hole is arranged at the bottom of the embedded groove inner cavity, the guide piece is arranged on the inner surface of the pin hole, and the cross penetrating groove is arranged at the middle position and the lower position of the embedded block. The pins of the DC/DC power supply module are corrected through the design of the guide piece, the pins are prevented from being bent in the transportation process, the self connection performance is not impressed, meanwhile, the cylindrical guide piece body reduces the self friction force, and the pins cannot be broken in the process of correcting the pins.
Preferably, the embedding block is located in the middle of the inner cavity of the protection mechanism, the cross penetrating groove penetrates through the embedding block and extends to the outer surface of the embedding block, and the pin hole is communicated with the cross penetrating groove. Through the design that the cross runs through the groove with power module's pin and external environment be connected, make things convenient for power pin to carry out the heat dissipation of air current, avoid pin self thermal concentration to lead to the welding point to produce the damage.
Preferably, the protection mechanism comprises:
the protective shell is provided with a square shell, a cooling fan arranged in the middle of the top of the square shell, and position adjusting mechanisms arranged at four corners of the bottom of the inner surface of the square shell;
the heat-collecting plate is provided with an arc-shaped plate body and a thermistor switch arranged on the inner surface of the arc-shaped plate body. The control of implementing is carried out to inside temperature through thermistor switch's design, and self-intellectuality gives off the heat, avoids self to use the production of harm phenomena such as catching fire that overheated lead to, need not personnel to carry out the control of implementing, and self mechanized design need not accurate electron device simultaneously, the effectual manufacturing cost that has reduced.
Preferably, the cooling fan top runs through the protective housing and extends to the protective housing top, just the heat collecting plate is located position control mechanism top, and the heat collecting plate keep away from one side of protective housing with power embedding mechanism connects. The track of the internal airflow is limited through the design of the protective shell, the protective shell is matched with the cross through groove and the pin holes to realize the circulation of the airflow, the power module is cooled and radiated in an all-round mode, and the overheating phenomenon of the power module is thoroughly avoided.
Preferably, the fixing mechanism comprises a threaded spherical panel and a heat dissipation through hole formed in the top of the threaded spherical panel, and is installed on a flow gathering spherical panel on the top of the threaded spherical panel and a ventilation through hole formed in the inner surface of the flow gathering spherical panel. The design through screw thread ball panel is installed fixedly to power module, and the spherical structure of self carries out homodisperse with ambient pressure simultaneously, avoids stress concentration to cause the damage to power module, carries out the protection of continuation to power module to fixed positioning makes power module and equipment laminate more, integrates the structure, avoids mutual dislocation wearing and tearing.
Preferably, the outer surface of the threaded spherical plate is arranged on the inner surface of the embedding block, the threaded spherical plate and the flow-gathering spherical plate are positioned in the inner cavity of the embedding groove, and the positions of the ventilation through holes and the positions of the heat dissipation through holes are staggered. The cooling air flow is concentrated through the flow gathering ball panel and is matched with the heat dissipation through holes to achieve uniform output of the air flow, the heat dissipation area is enlarged, the temperature difference caused by local heat dissipation is avoided, and the consistency of the component and a power supply is protected.
During the use, contact screw thread ball panel and rotation embedding piece, later rotate screw thread ball panel, fix through the screw thread that the inside embedding recess surface of embedding piece set up.
Preferably, the position adjustment mechanism includes:
the heat conducting plate is provided with a spherical disc body, a thermal expansion column arranged in the middle of the spherical disc body, a limiting supporting rod arranged at the bottom of the spherical disc body and positioned outside the thermal expansion column, and a leveling rod arranged at the other end of the limiting supporting rod and arranged at a frustum block arranged at the bottom of the leveling rod. Generate heat through power module self and drive, change the air current route, give off the air current through the protective housing bottom, promote the speed that the air current flows, promote the radiating speed of cooling, can assist the air current to carry out the clearance of surface deposition ash to power module's installation mechanism simultaneously, avoid the circuit to produce the jam.
Preferably, the outer surface of the heat conducting plate is arranged on the inner surface of the protective shell, and the bottom of the thermal expansion column is connected with the frustum block.
(III) advantageous effects
The invention provides an overheat protection device for a DC/DC power supply module. The method has the following beneficial effects:
(I), this DC/DC power module overheat protection device, design through protection mechanism provides initial protective capacities to power module, do not avoid power module direct and air to contact, reduce power module when using thermal production to self oxidation's speed, extension power module's life, the setting of cross mount has made things convenient for getting of whole device and installation simultaneously, carry out initial dust simultaneously and block, reduce the contact rate of dust and equipment
The DC/DC power module overheating protection device corrects the pins of the DC/DC power module through the design of the guide piece, the pins are prevented from being bent in the transportation process, the connection performance of the pins is not impressed, meanwhile, the friction force of the cylindrical guide piece body is reduced, and the pins cannot be broken in the process of correcting the pins.
The DC/DC power supply module overheating protection device is characterized in that pins of the power supply module are connected with the external environment through the design of the cross through groove, so that the pins of the power supply can conveniently dissipate heat of air flow, and damage to welding points caused by heat concentration of the pins is avoided.
(IV), this DC/DC power module overheat protection device, the control of implementing is carried out to inside temperature through thermistor switch's design, and self-intellectuality gives off the heat, avoids self to use the production of harm phenomena such as catching fire that overheated leads to, need not personnel to carry out the control of implementing, and self mechanized design need not accurate electron device simultaneously, the effectual manufacturing cost that has reduced.
The DC/DC power module overheating protection device limits the track of internal airflow through the design of the protection shell, is matched with the cross through groove and the pin holes to realize the circulation of the airflow, carries out all-around cooling and heat dissipation on the power module, and thoroughly avoids the overheating phenomenon of the power module.
(VI), this DC/DC power module overheat protection device installs power module through the design of screw thread ball panel fixedly, and the spherical structure of self carries out evenly distributed with ambient pressure simultaneously, avoids stress concentration to cause the damage to power module, carries out the protection of continuation to power module to fixed positioning makes power module and equipment laminate more, integrates the structure, avoids mutual dislocation wearing and tearing.
(VII) the DC/DC power module overheating protection device concentrates the cooling air flow through the flow-gathering ball panel, and is matched with the heat dissipation through hole to realize the uniform output of the air flow, enlarge the heat dissipation area, avoid the temperature difference caused by local heat dissipation, and realize the consistency protection of the component and the power supply.
(eight), this DC/DC power module overheat protection device generates heat through power module self and drives, changes the air current route, gives off the air current through the protective housing bottom, promotes the speed that the air current flows, promotes the radiating speed of cooling, can assist the air current to carry out the clearance of surface deposition ash to power module's installation mechanism simultaneously, avoids the circuit to produce the jam.
Drawings
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a schematic structural diagram of a power supply embedding mechanism according to the present invention;
FIG. 3 is a schematic structural view of the fixing mechanism of the present invention;
FIG. 4 is a schematic structural view of the protection mechanism of the present invention;
FIG. 5 is a schematic view of the position adjustment mechanism of the present invention;
in the figure: the device comprises a power supply embedding mechanism 1, an 11 embedding block, a 12 embedding groove, a 13 fixing mechanism, a 131 threaded ball panel, a 132 heat dissipation through hole, a 133 flow focusing ball panel, a 134 ventilation through hole, a 14 pin hole, a 15 guide piece, a 16 cross through groove, a 2 protection mechanism, a 21 protection shell, a 22 cooling fan, a 23 position adjusting mechanism, a 231 heat conduction plate, a 232 thermal expansion column, a 233 limiting support rod, a 234 correcting rod, a 235 cone block, a 24 heat collecting plate, a 25 thermistor switch and a 3 cross fixing frame.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, 2 and 4, the present invention provides a technical solution: an overheat protection device for a DC/DC power supply module specifically comprises:
the embedded block 11 is provided with a square column body, an embedded groove 12 arranged at the top of the square column body, a fixing mechanism 13 arranged in the inner cavity of the embedded groove 12, a pin hole 14 arranged at the bottom of the inner cavity of the embedded groove 12, a guide piece 15 arranged on the inner surface of the pin hole 14, and a cross through groove 16 arranged at the lower position in the embedded block 11. The pins of the DC/DC power supply module are corrected through the design of the guide piece 15, the pins are prevented from being bent in the transportation process, the self connection performance is not impressed, meanwhile, the cylindrical guide piece 15 body reduces the self friction force, and the pins cannot be broken in the process of correcting the pins.
The embedded block 11 is located in the middle of the inner cavity of the protection mechanism 2, the cross through groove 16 penetrates through the embedded block 11 and extends to the outer surface of the embedded block 11, and the pin hole 14 is communicated with the cross through groove 16. The pins of the power supply module are connected with the external environment through the design of the cross through grooves 16, so that the pins of the power supply are convenient to dissipate heat of air flow, and damage to welding points caused by heat concentration of the pins is avoided.
The protection mechanism 2 includes:
the protective shell 21 is provided with a square shell, a cooling fan 22 arranged in the middle of the top of the square shell, and position adjusting mechanisms 23 arranged at four corners of the bottom of the inner surface of the square shell;
a heat-collecting plate 24, the heat-collecting plate 24 having an arc-shaped plate body, and a thermistor switch 25 mounted on an inner surface of the arc-shaped plate body. Control of implementing is carried out to inside temperature through thermistor switch 25's design, and self-intellectuality gives off the heat, avoids self to use the production of harm phenomena such as catching fire that overheated leads to, need not personnel and carries out the control of implementing, and self mechanized design need not accurate electron device simultaneously, the effectual manufacturing cost that has reduced.
The top of the cooling fan 22 penetrates through the protective shell 21 and extends to the top of the protective shell 21, the heat collecting plate 24 is located above the position adjusting mechanism 23, and one side, away from the protective shell 21, of the heat collecting plate 24 is connected with the power embedding mechanism 1. The track of the internal airflow is limited through the design of the protective shell 21, the internal airflow is matched with the cross through groove 16 and the pin holes 14 to realize the circulation of the airflow, the power module is cooled and radiated in an all-around manner, and the overheating phenomenon of the power module is thoroughly avoided.
When the power supply module is used, the power supply module is calibrated and installed through the guide of the pin holes 14 and the guide pieces 15, then the power supply module is fixed through the fixing mechanism 13, the power supply module is installed in the inner cavity of the embedding groove 12 of the embedding block 11, and then the power supply embedding mechanism 1 is integrally arranged in the inner cavity of the protection mechanism 2;
when the power module is used, the heat is generated by the heat-generating plate 24, the heat is gathered by the heat-collecting plate to enable the thermistor switch 25 to be turned on, the cooling fan 22 is started to cool the inside, internal airflow circulation cooling is carried out through the cross through groove 16 and the pin holes 14, and then airflow is led out through the pin holes 14 without pins.
Example two:
referring to fig. 1-4, on the basis of the first embodiment, the present invention provides a technical solution: the fixing mechanism 13 includes a threaded ball panel 131, a heat dissipating through hole 132 formed at the top of the threaded ball panel 131, a fluid collecting ball panel 133 mounted at the top of the threaded ball panel 131, and a ventilation through hole 134 formed at the inner surface of the fluid collecting ball panel 133. The design through screw thread spherical panel 131 installs fixedly to power module, and the spherical structure of self carries out homodisperse with ambient pressure simultaneously, avoids stress concentration to cause the damage to power module, carries out the protection of continuation to power module to fixed positioning makes power module and equipment laminate more, integrates the structure, avoids mutual dislocation wearing and tearing.
The outer surface of the screw ball panel 131 is mounted on the inner surface of the insert block 11, and the screw ball panel 131 and the fluid collecting ball panel 133 are located in the cavity of the insert groove 12, and the positions of the ventilation through holes 134 and the heat dissipation through holes 132 are staggered with each other. The cooling air flow is concentrated through the flow collecting ball panel 133 and is matched with the heat dissipation through holes 132 to realize uniform output of the air flow, the heat dissipation area is enlarged, the temperature difference caused by local heat dissipation is avoided, and the consistency of components and a power supply is protected.
In use, the threaded ball panel 131 is contacted with the rotary insert 11, and then the threaded ball panel 131 is rotated to be fixed by the threads arranged on the surface of the insert groove 12 in the insert 11.
Example three:
referring to fig. 1-5, on the basis of the first embodiment and the second embodiment, the present invention provides a technical solution: the position adjustment mechanism 23 includes:
the heat conducting plate 231 is provided with a spherical disc body, a thermal expansion column 232 arranged in the middle of the spherical disc body, a limiting support rod 233 arranged at the bottom of the spherical disc body and positioned outside the thermal expansion column 232, a correcting rod 234 arranged at the other end of the limiting support rod 233, and a frustum block 235 arranged at the bottom of the correcting rod 234. Generate heat through power module self and drive, change the air current route, give off the air current through protective housing 21 bottom, promote the speed that the air current flows, promote the radiating speed of cooling, but the clearance that the auxiliary air current carries out the surface deposition ash to power module's installation mechanism simultaneously avoids the circuit to produce the jam.
The outer surface of the heat conducting plate 231 is installed on the inner surface of the protective shell 21, and the bottom of the thermal expansion column 232 is connected with the frustum block 235.
During the use, power module's heat can make thermal expansion post 232 carry out the thermal expansion extension, supports frustum piece 235, carries out the location of direction with spacing branch 233 and leveling rod 234, with protective housing 21 jack-up, dispels the heat fast, later resets through the weight of protective housing 21 self.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. An overheat protection device for a DC/DC power supply module specifically comprises:
power embedding mechanism (1), this power embedding mechanism (1) have square main part, and install protection machanism (2) of square main part surface, and install cross mount (3) at protection machanism (2) top, its characterized in that: the power supply embedding mechanism (1) comprises:
the embedded block (11) is provided with a square column body, an embedded groove (12) formed in the top of the square column body, a fixing mechanism (13) arranged in the inner cavity of the embedded groove (12), a pin hole (14) formed in the bottom of the inner cavity of the embedded groove (12), a guide piece (15) installed on the inner surface of the pin hole (14), and a cross penetrating groove (16) formed in the middle lower position of the embedded block (11), the embedded block (11) is located in the middle of the inner cavity of the protection mechanism (2), the cross penetrating groove (16) penetrates through the embedded block (11) and extends to the outer surface of the embedded block (11), and the pin hole (14) is communicated with the cross penetrating groove (16);
the fixing mechanism (13) comprises a threaded ball panel (131), a heat dissipation through hole (132) formed in the top of the threaded ball panel (131), a flow collecting ball panel (133) mounted on the top of the threaded ball panel (131), and a ventilation through hole (134) formed in the inner surface of the flow collecting ball panel (133);
the protection mechanism (2) comprises:
the protective shell (21), the protective shell (21) has square body, and install the cooling blower (22) in the middle position of the top of the said square body, and install the position control mechanism (23) in the bottom four corners of the internal surface of the said square body;
a heat-collecting plate (24), the heat-collecting plate (24) having an arc-shaped plate body, and a thermistor switch (25) mounted on an inner surface of the arc-shaped plate body;
the position adjustment mechanism (23) includes:
the heat conduction plate (231), this heat conduction plate (231) have the sphere disk body, and install in the hot expansion post (232) of sphere disk body intermediate position, and install in sphere disk body bottom and be located the spacing branch (233) of hot expansion post (232) outside, and install rectify the pole (234) at the spacing branch (233) other end, and install in the frustum piece (235) of rectifying pole (234) bottom.
2. The DC/DC power supply module overheat protection device according to claim 1, wherein: the outer surface of the threaded ball panel (131) is arranged on the inner surface of the embedding block (11), the threaded ball panel (131) and the flow-gathering ball panel (133) are positioned in the inner cavity of the embedding groove (12), and the positions of the ventilation through holes (134) and the heat dissipation through holes (132) are staggered with each other.
3. The DC/DC power supply module overheat protection device according to claim 1, wherein: the top of the cooling fan (22) penetrates through the protective shell (21) and extends to the top of the protective shell (21), the heat-collecting plate (24) is located above the position adjusting mechanism (23), and one side, away from the protective shell (21), of the heat-collecting plate (24) is connected with the power embedding mechanism (1).
4. The DC/DC power supply module overheat protection device according to claim 1, wherein: the outer surface of the heat conducting plate (231) is arranged on the inner surface of the protective shell (21), and the bottom of the thermal expansion column (232) is connected with the frustum block (235).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110549533.5A CN113242677B (en) | 2021-05-20 | 2021-05-20 | DC/DC power module overheat protection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110549533.5A CN113242677B (en) | 2021-05-20 | 2021-05-20 | DC/DC power module overheat protection device |
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| CN113242677A CN113242677A (en) | 2021-08-10 |
| CN113242677B true CN113242677B (en) | 2021-10-08 |
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| CN211457846U (en) * | 2020-03-13 | 2020-09-08 | 深圳市晶尚景电子科技有限公司 | Special power module of heat dissipation type medical instrument |
| CN212063849U (en) * | 2020-06-05 | 2020-12-01 | 西安冠德电子科技有限公司 | Overheat protection device of AC/DC power module |
| CN212752971U (en) * | 2020-08-13 | 2021-03-19 | 深圳市芯华超电子科技有限公司 | Protection device of AC-DC power module |
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2021
- 2021-05-20 CN CN202110549533.5A patent/CN113242677B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209805656U (en) * | 2019-04-19 | 2019-12-17 | 合肥远江电源科技有限公司 | Medical isolated power supply with multi-path output of circuit system of direct current converter |
| CN110505795A (en) * | 2019-08-26 | 2019-11-26 | 深圳市易光科技有限公司 | A kind of LED drive power with overheating protection function |
| CN210297556U (en) * | 2019-09-03 | 2020-04-10 | 深圳市盛基电源有限公司 | Protection device of AC-DC power module |
| CN211457846U (en) * | 2020-03-13 | 2020-09-08 | 深圳市晶尚景电子科技有限公司 | Special power module of heat dissipation type medical instrument |
| CN212063849U (en) * | 2020-06-05 | 2020-12-01 | 西安冠德电子科技有限公司 | Overheat protection device of AC/DC power module |
| CN212752971U (en) * | 2020-08-13 | 2021-03-19 | 深圳市芯华超电子科技有限公司 | Protection device of AC-DC power module |
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