CN112769064A - Cooling system of passive distribution box - Google Patents

Cooling system of passive distribution box Download PDF

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Publication number
CN112769064A
CN112769064A CN202110005489.1A CN202110005489A CN112769064A CN 112769064 A CN112769064 A CN 112769064A CN 202110005489 A CN202110005489 A CN 202110005489A CN 112769064 A CN112769064 A CN 112769064A
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China
Prior art keywords
heat dissipation
air
heat
sliding
liquid storage
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CN202110005489.1A
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Chinese (zh)
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冯佳浩
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Individual
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Individual
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Priority to CN202110005489.1A priority Critical patent/CN112769064A/en
Publication of CN112769064A publication Critical patent/CN112769064A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/56Cooling; Ventilation
    • H02B1/565Cooling; Ventilation for cabinets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/46Boxes; Parts thereof or accessories therefor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

The invention discloses a heat dissipation system of a passive distribution box, which comprises a box body, wherein the box body is arranged on the ground, a heat dissipation chamber is arranged in the box body, mounting ports are respectively arranged on the inner walls of two sides of the heat dissipation chamber, the upper ends of the two mounting ports are respectively provided with a rotating groove, a liquid storage box and two mounting blocks are fixedly connected to the inner top of the heat dissipation chamber, and the two mounting blocks are fixed on two sides of the liquid storage box; the heat trigger mechanism comprises cooling liquid filled in a liquid storage box, sliding grooves are formed in the back sides of the two mounting blocks, an air inlet is formed in the inner bottom of each sliding groove, and a sliding plate used for sliding left and right is arranged in each sliding groove. In the using process of the heat dissipation system, active heat dissipation is realized by utilizing heat accumulated in the distribution box, and an auxiliary mechanism is further arranged, so that the heat dissipation effect is better.

Description

Cooling system of passive distribution box
Technical Field
The invention relates to the field of distribution boxes, in particular to a heat dissipation system of a passive distribution box.
Background
The distribution box has the characteristics of distributing electric energy, facilitating the opening and closing operation of a circuit, having higher safety protection level and being capable of visually displaying the conduction state of the circuit, and has the most important function in our life;
the heat dissipation problem of the distribution box is always a problem, the existing distribution box generally has two heat dissipation modes, one mode is passive heat dissipation, a plurality of ventilation openings are usually formed in two side walls of the distribution box and used for ventilation and heat dissipation, but the heat dissipation effect of the heat dissipation mode is poor, the distribution box is basically always in a working state, so that the heat dissipation mode often has insufficient heat dissipation, the heat inside the distribution box is accumulated, and finally, the internal elements of the distribution box are in a high-temperature working state for a long time, and the service life is reduced;
the other type is active heat dissipation, the heat dissipation mode is generally driven by electric energy, and the electric energy is seriously consumed in the continuous use process.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a passive heat dissipation system of a distribution box.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heat dissipation system of a passive distribution box comprises a box body, wherein the box body is arranged on the ground, a heat dissipation chamber is arranged in the box body, mounting ports are formed in the inner walls of two sides of the heat dissipation chamber, a rotating groove is formed in the upper ends of the two mounting ports, a liquid storage box and two mounting blocks are fixedly connected to the inner top of the heat dissipation chamber, and the two mounting blocks are fixed to two sides of the liquid storage box; the heat triggering mechanism comprises cooling liquid filled in the liquid storage box, sliding grooves are formed in the opposite sides of the two mounting blocks, an air inlet is formed in the inner bottom of each sliding groove, a sliding plate used for sliding left and right is arranged in each sliding groove, the opposite surfaces of the two sliding plates are connected with the inner wall of one side, close to the liquid storage box, of the corresponding sliding groove through air bags, a memory metal wire is arranged in each air bag, the two ends of the memory metal wire are fixedly connected with the sliding plates and the inner walls of the sliding grooves respectively, one side of each sliding plate, which is close to the liquid storage box, is fixedly connected with a heat conducting rod, each heat conducting rod is positioned in a corresponding air bag, a plurality of air holes are formed in the two air bags, each air bag is communicated with the interior of the liquid storage box through a heat dissipation port, and one end, which is close to the liquid storage box, of each heat conducting rod extends into the heat dissipation port and is fixedly connected with a heat insulation rod; silence heat dissipation mechanism, silence heat dissipation mechanism is including two dwangs, two of vertical setting in two rotation grooves respectively the upper end of dwang all rotates with the interior top that rotates the groove and is connected, every torsion spring is installed with the rotation junction that corresponds the rotation groove to the dwang, every the dwang all passes through the stay cord with the sliding plate that corresponds and is connected, every the lower extreme of dwang all extends to in the installing port and fixedly connected with heat dissipation post, the interior symmetry of heat dissipation post is equipped with two and annotates the liquid chamber, the lateral wall of heat dissipation post inlays to be equipped with respectively annotates liquid chamber matched with conducting strip with two.
Preferably, the two heat-conducting fins are arc-shaped, distilled water is filled in the liquid injection cavities, each sliding plate is provided with a ventilation opening, a cooling fin is installed in the liquid storage box, and the upper end of the cooling fin extends to the outside.
Preferably, two heat dissipation plates are symmetrically arranged in each heat dissipation chamber, an air outlet cavity, an air cavity and an air suction cavity are arranged in each heat dissipation plate, the air outlet cavity and the air suction cavity are located on two sides of the air cavity, each air outlet cavity is located on one side, close to the corresponding heat dissipation column, of the corresponding air cavity, and an auxiliary mechanism is arranged in each heat dissipation plate;
the auxiliary mechanism comprises a magnetic plate which is connected in the air cavity in a sliding mode, one side, far away from the heat dissipation column, of the magnetic plate is elastically connected with the inner wall of one side of the air cavity through a connecting spring, the air outlet cavity is communicated with the air cavity through an exhaust pipe, the air suction cavity is communicated with the air cavity through an air inlet pipe, an air outlet is formed in one side, close to the corresponding heat dissipation column, of the air outlet cavity, and an air suction inlet is formed in one side, far away from the corresponding heat dissipation column, of the air suction cavity.
Preferably, the two heat conducting fins on each heat dissipation column have magnetism, and each heat conducting fin is opposite in attraction to the adjacent surface of the corresponding magnetic plate.
Compared with the prior art, the invention has the beneficial effects that:
1. along with the rising of temperature, the sliding plate can remove about, thereby drive the heat dissipation post and rotate and revolve, the distilled water in the heat dissipation post can absorb the indoor heat of heat dissipation through the conducting strip, and when rotating and being located the external world, can arrange the external world with the absorbed temperature in the distilled water through the conducting strip, whole in-process, can be continuous from the heat dissipation room absorbed heat, then arrange into the external world, realize the initiative heat dissipation, and this initiative radiating mode, need not electric energy drive, when having reduced electric energy loss, for passive heat dissipation improved radiating effect.
2. The magnetic plate can move about along with the rotation of heat dissipation post, and when the magnetic plate moved to the right, can inhale the air cavity through the temperature of a plurality of inlet scoop, air suction chamber and air-supply line with electric elements department, when the magnetic plate moved to the left, can discharge the steam in the air cavity to conducting strip department through the air outlet to in inhaling the corresponding distilled water through the conducting strip, can accelerate the rate of heat dissipation of electric elements department.
Drawings
Fig. 1 is a schematic structural diagram of a heat dissipation system of a passive distribution box according to the present invention;
FIG. 2 is a top cross-sectional view of a heat-dissipating stud;
FIG. 3 is an enlarged view of FIG. 1 at A;
FIG. 4 is a front view of the air bag;
FIG. 5 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 6 is an enlarged view of the heat radiating plate of fig. 5.
In the figure: 1 box body, 2 heat dissipation chambers, 3 heat dissipation columns, 4 mounting ports, 5 liquid injection cavities, 6 rotating grooves, 7 rotating rods, 8 torsion springs, 9 mounting blocks, 10 air inlets, 11 sliding grooves, 12 heat dissipation fins, 13 liquid storage boxes, 14 heat conduction fins, 15 air bags, 16 memory metal wires, 17 heat conduction rods, 18 air holes, 19 heat dissipation plates, 20 air cavities, 21 connecting springs, 22 magnetic plates, 23 air outlet cavities, 24 air outlets, 25 air suction ports, 26 air suction cavities, 27 air inlet pipes, 28 exhaust pipes, 29 sliding plates and 30 heat insulation rods.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-4, a heat dissipation system of a passive distribution box comprises a box body 1, wherein the box body 1 is arranged on the ground, a heat dissipation chamber 2 is arranged in the box body 1, mounting ports 4 are respectively arranged on the inner walls of two sides of the heat dissipation chamber 2, a rotating groove 6 is respectively arranged at the upper ends of the two mounting ports 4, a liquid storage box 13 and two mounting blocks 9 are fixedly connected to the inner top of the heat dissipation chamber 2, and the two mounting blocks 9 are fixed on two sides of the liquid storage box 13;
the heat trigger mechanism comprises cooling liquid filled in a liquid storage box 13, sliding grooves 11 are formed in opposite sides of two mounting blocks 9, an air inlet 10 is formed in the inner bottom of each sliding groove 11, a sliding plate 29 used for sliding left and right is arranged in each sliding groove 11, opposite surfaces of the two sliding plates 29 are connected with the inner wall of one side, close to the liquid storage box 13, of the corresponding sliding groove 11 through air bags 15, a memory metal wire 16 is arranged in each air bag 15, the memory metal wire 16 is in a strip shape at normal temperature and in a spiral shape at high temperature, two ends of the memory metal wire 16 are fixedly connected with the sliding plates 29 and the inner wall of the sliding groove 11 respectively, a heat conducting rod 17 is fixedly connected to one side, close to the liquid storage box 13, of each sliding plate 29, each heat conducting rod 17 is located in the corresponding air bag 15, a plurality of air holes 18 are formed in the two air bags 15, each air bag 15 is communicated with the inside of the liquid storage box 13, one end of each heat conducting rod 17 close to the liquid storage box 13 extends into the heat radiating port and is fixedly connected with a heat insulating rod 30;
silence heat dissipation mechanism, silence heat dissipation mechanism is including two dwang 7 of vertical setting in two rotation grooves 6 respectively, the upper end of two dwang 7 all rotates with the interior top that rotates groove 6 to be connected, every dwang 7 is installed torque spring 8 with the rotation junction that corresponds rotation groove 6, every dwang 7 all passes through the stay cord with the sliding plate 29 that corresponds and is connected, the lower extreme of every dwang 7 all extends to in installing port 4 and fixedly connected with heat dissipation post 3, the symmetry is equipped with two and annotates liquid chamber 5 in the heat dissipation post 3, the lateral wall of heat dissipation post 3 inlays to be equipped with respectively with two notes liquid chamber 5 matched with conducting strip 14.
Wherein, two heat conduction fins 14 are both arc-shaped, the two liquid injection cavities 5 are filled with distilled water, each sliding plate 29 is provided with a vent, a heat radiation fin 12 is arranged in the liquid storage box 13, and the upper end of the heat radiation fin 12 extends to the outside.
In the present invention, in an initial state, as shown in fig. 1, the memory wire 16 is in a strip shape, and as the electric element in the heat dissipation chamber 2 continuously works (the dashed line frame is the working electric element), the temperature in the heat dissipation chamber 2 starts to rise, the high-temperature gas gradually rises (the density of the high-temperature gas is small), and then enters the sliding groove 11 through the air inlet 10, and enters the inside of the air bag 15 through the plurality of air holes 18, the temperature in the air bag 15 slowly gathers, so that the memory wire 16 reaches its metamorphosis temperature, and changes from the strip shape to a spiral shape, and pulls the corresponding sliding plate 29 to move close to the liquid storage box 13, after the sliding plate 29 moves close to the liquid storage box 13, the air bag 15 contracts to seal the plurality of air holes 18 thereon, and no external gas can enter the air bag 15 (the air bag 15 here can be made of, ensuring that the shrinkage of the film can not be interfered by the temperature of the outside air);
the movement of the sliding plate 29 can drive one end of the heat conducting rod 17 far away from the sliding plate 29 to enter the liquid storage box 13, at this time, the temperature inside the air bag 15 can be quickly discharged into the condensate in the liquid storage box 13 through the heat conducting rod 17, and after the temperature is reduced, the state of fig. 1 can be restored, at this time, the heat conducting rod 17 is positioned in the corresponding heat dissipation port, and the heat insulation rod 30 is also positioned in the heat dissipation port;
namely, after the temperature rises, the sliding plate 29 moves left and right, taking the sliding plate 29 on the left side as an example, after the sliding plate 29 moves right, the rotating rod 7 which can be pulled rotates, and the corresponding torsion spring 8 is in a stretched state, when the sliding plate 29 moves left, the rotating rod 7 can drive the heat dissipation column 3 to rotate under the elastic action of the torsion spring 8, the distilled water in the heat dissipation column 3 can absorb the heat in the heat dissipation chamber 2 through the heat conduction sheet 14, and when the sliding plate rotates to be located outside, the temperature absorbed in the distilled water can be discharged to the outside through the heat conduction sheet 14, in the whole process, the distilled water can continuously absorb the heat from the heat dissipation chamber 2 and then is discharged to the outside, so that the active heat dissipation is realized, in the active heat dissipation mode, the electric energy driving is not needed, and the heat dissipation effect is improved compared with the passive heat dissipation;
it is worth mentioning that when the air bag 15 is contracted, the temperature therein is transferred to the cooling liquid in the liquid storage box 13 through the heat conducting rod 17, and finally the heat is transferred to the outside by the plurality of heat dissipation fins 12, which is also equal to the temperature in the heat dissipation chamber 2.
Example 2
Referring to fig. 5-6, the difference between this embodiment and embodiment 1 is that two heat dissipation plates 19 are symmetrically disposed in the heat dissipation chamber 2, each heat dissipation plate 19 is provided with an air outlet cavity 23, an air cavity 20 and an air suction cavity 26, the air outlet cavity 23 and the air suction cavity 26 are disposed at two sides of the air cavity 20, each air outlet cavity 23 is disposed at one side of the corresponding air cavity 20 close to the corresponding heat dissipation column 3, and each heat dissipation plate 19 is provided with an auxiliary mechanism therein;
the complementary unit includes magnetic plate 22 of sliding connection in air cavity 20, one side that heat dissipation post 3 was kept away from to magnetic plate 22 passes through one side inner wall elastic connection of coupling spring 21 with air cavity 20, air-out chamber 23 passes through exhaust pipe 28 and air cavity 20 intercommunication, air-suction chamber 26 passes through air-supply line 27 and air cavity 20 intercommunication, exhaust pipe 28 and air-supply line 27 are the pipeline of installing the check valve, guarantee gaseous one-way mobility, one side that air-out chamber 23 is close to corresponding heat dissipation post 3 is equipped with air outlet 24, one side that corresponding heat dissipation post 3 was kept away from to air-suction chamber 26 is equipped with inlet scoop 25.
The two heat conducting fins 14 on each heat dissipation column 3 have magnetism, and each heat conducting fin 14 is opposite attracted to the adjacent surface of the corresponding magnetic plate 22.
In this embodiment, in the state of fig. 5, taking the heat dissipation plate 19 on the left side as an example, at this time, the magnetic plate 22 moves left under the attraction force of the heat conduction fins 14 and stretches the connection spring 21, after the heat dissipation column 3 rotates, the two heat conduction fins 14 are switched once (the inner heat conduction fin 14 rotates to the outer side and the outer heat conduction fin 14 rotates to the inner side), at this time, the attraction force of the magnetic plate 22 becomes smaller and then larger, after the attraction force becomes smaller, the magnetic plate 22 moves right under the elastic action of the connection spring 21, and when the attraction force becomes larger, the magnetic plate moves left and moves right, when the magnetic plate 22 moves right, the temperature of the electrical component is sucked into the air cavity 20 through the plurality of air suction ports 25, the air suction cavity 26 and the air inlet pipe 27, when the magnetic plate 22 moves left, the hot air in the air cavity 20 is discharged to the heat conduction fins 14 through the air outlet 24, and the heat is sucked into the corresponding distilled water through the heat conduction fins 14, the rate of heat dissipation at the electrical component can be accelerated.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (4)

1. A heat dissipation system for a passive power distribution box, comprising:
the box body (1) is arranged on the ground, a heat dissipation chamber (2) is arranged in the box body (1), mounting ports (4) are formed in the inner walls of two sides of the heat dissipation chamber (2), a rotating groove (6) is formed in the upper ends of the two mounting ports (4), a liquid storage box (13) and two mounting blocks (9) are fixedly connected to the inner top of the heat dissipation chamber (2), and the two mounting blocks (9) are fixed to two sides of the liquid storage box (13);
the heat triggering mechanism comprises cooling liquid filled in a liquid storage box (13), sliding grooves (11) are formed in the opposite sides of two mounting blocks (9), an air inlet (10) is formed in the inner bottom of each sliding groove (11), a sliding plate (29) used for sliding left and right is arranged in each sliding groove (11), the opposite surfaces of the two sliding plates (29) are connected with the inner wall of one side, close to the liquid storage box (13), of the corresponding sliding groove (11) through air bags (15), a memory metal wire (16) is arranged in each air bag (15), two ends of each memory metal wire (16) are fixedly connected with the inner walls of the sliding plates (29) and the sliding grooves (11) respectively, a heat conducting rod (17) is fixedly connected to one side, close to the liquid storage box (13), of each sliding plate (29), and each heat conducting rod (17) is located in the corresponding air bag (15), a plurality of air holes (18) are formed in each of the two air bags (15), each air bag (15) is communicated with the interior of the liquid storage box (13) through a heat dissipation opening, and one end, close to the liquid storage box (13), of each heat conduction rod (17) extends into the heat dissipation opening and is fixedly connected with a heat insulation rod (30);
silence heat dissipation mechanism, silence heat dissipation mechanism is including two dwang (7) of vertical setting in two rotation grooves (6), two respectively the upper end of dwang (7) all rotates with the interior top of rotation groove (6) and is connected, every dwang (7) and the rotation junction that corresponds rotation groove (6) install torsion spring (8), every dwang (7) all are connected through the stay cord with corresponding sliding plate (29), every the lower extreme of dwang (7) all extends to in installing port (4) and fixedly connected with heat dissipation post (3), the symmetry is equipped with two and annotates liquid chamber (5) in heat dissipation post (3), the lateral wall of heat dissipation post (3) inlays to be equipped with respectively with two and annotates liquid chamber (5) matched with conducting strip (14).
2. The heat dissipation system of a passive distribution box according to claim 1, wherein the two heat conduction fins (14) are arc-shaped, the two liquid injection cavities (5) are filled with distilled water, each sliding plate (29) is provided with a ventilation opening, a heat dissipation fin (12) is installed in the liquid storage box (13), and the upper end of the heat dissipation fin (12) extends to the outside.
3. The heat dissipation system of the passive distribution box according to claim 1, wherein two heat dissipation plates (19) are symmetrically arranged in the heat dissipation chamber (2), each heat dissipation plate (19) is internally provided with an air outlet cavity (23), an air cavity (20) and an air suction cavity (26), the air outlet cavity (23) and the air suction cavity (26) are located at two sides of the air cavity (20), each air outlet cavity (23) is located at one side of the corresponding air cavity (20) close to the corresponding heat dissipation column (3), and each heat dissipation plate (19) is internally provided with an auxiliary mechanism;
the auxiliary mechanism includes magnetic plate (22) of sliding connection in air cavity (20), one side that heat dissipation post (3) was kept away from in magnetic plate (22) passes through one side inner wall elastic connection of coupling spring (21) and air cavity (20), air outlet chamber (23) are through exhaust pipe (28) and air cavity (20) intercommunication, air inlet chamber (26) are through air-supply line (27) and air cavity (20) intercommunication, one side that air outlet chamber (23) are close to corresponding heat dissipation post (3) is equipped with air outlet (24), one side that corresponding heat dissipation post (3) were kept away from in air inlet chamber (26) is equipped with inlet scoop (25).
4. The heat dissipation system of a passive distribution box according to claim 3, wherein the two heat conduction fins (14) of each heat dissipation column (3) have magnetism, and each heat conduction fin (14) is opposite attracted to the adjacent surface of the corresponding magnetic plate (22).
CN202110005489.1A 2021-01-05 2021-01-05 Cooling system of passive distribution box Pending CN112769064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110005489.1A CN112769064A (en) 2021-01-05 2021-01-05 Cooling system of passive distribution box

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Application Number Priority Date Filing Date Title
CN202110005489.1A CN112769064A (en) 2021-01-05 2021-01-05 Cooling system of passive distribution box

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CN112769064A true CN112769064A (en) 2021-05-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113328364A (en) * 2021-06-17 2021-08-31 郭长胜 Power distribution cabinet convenient for heat dissipation
CN113990001A (en) * 2021-10-29 2022-01-28 贵阳耘志电子技术有限公司 Remote-control controllable alarm equipment based on big data platform

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110601025A (en) * 2019-10-21 2019-12-20 朱蛟龙 Power distribution cabinet
CN111405836A (en) * 2020-04-29 2020-07-10 胡梦 Intelligent 5G communication base station with automatic cooling function
CN111653956A (en) * 2020-05-27 2020-09-11 金华市秸和环保技术咨询有限公司 High-efficient cooling heat abstractor of cladding type electric power cabinet
CN211530441U (en) * 2019-12-25 2020-09-18 西安邦诺电气设备有限公司 Switch board that radiating effect is good

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110601025A (en) * 2019-10-21 2019-12-20 朱蛟龙 Power distribution cabinet
CN211530441U (en) * 2019-12-25 2020-09-18 西安邦诺电气设备有限公司 Switch board that radiating effect is good
CN111405836A (en) * 2020-04-29 2020-07-10 胡梦 Intelligent 5G communication base station with automatic cooling function
CN111653956A (en) * 2020-05-27 2020-09-11 金华市秸和环保技术咨询有限公司 High-efficient cooling heat abstractor of cladding type electric power cabinet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113328364A (en) * 2021-06-17 2021-08-31 郭长胜 Power distribution cabinet convenient for heat dissipation
CN113990001A (en) * 2021-10-29 2022-01-28 贵阳耘志电子技术有限公司 Remote-control controllable alarm equipment based on big data platform
CN113990001B (en) * 2021-10-29 2023-08-08 北京正道天成科技发展有限公司 Remote control controllable alarm device based on big data platform

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Application publication date: 20210507