CN217387961U - High-low voltage complete equipment distribution box convenient to heat dissipation - Google Patents

High-low voltage complete equipment distribution box convenient to heat dissipation Download PDF

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Publication number
CN217387961U
CN217387961U CN202220670443.1U CN202220670443U CN217387961U CN 217387961 U CN217387961 U CN 217387961U CN 202220670443 U CN202220670443 U CN 202220670443U CN 217387961 U CN217387961 U CN 217387961U
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pipe
box
fixed
fan
heat dissipation
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CN202220670443.1U
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黄红喜
江文
沈基熊
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Wuhan Tengjiang Electric Manufacturing Co ltd
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Wuhan Tengjiang Electric Manufacturing Co ltd
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Abstract

The utility model provides a high-low pressure complete equipment block terminal convenient to heat dissipation, install locating plate, support frame, fan box, exhaust fan, connecting pipe, pipe joint and induced duct on the box, wherein, the locating plate is fixed on the inner wall of box, the locating plate uses the longitudinal center line of box as the benchmark bilateral symmetry to be provided with two; the support frame is fixed on the positioning plate; the fan box is fixed on the outer side of the top wall of the box body; the exhaust fan is fixed on the side wall of the fan box; the connecting pipe is fixed on the inner side of the top wall of the box body and is communicated with the inside of the fan box; the pipeline joint is fixed at the lower end of the connecting pipe and is communicated with the connecting pipe; the induced duct is fixed at the lower end of the pipeline joint and is communicated with the pipeline joint, and the lower end of the induced duct is fixedly connected with the support frame; the induced draft pipe can directly extend to the electrical components inside the box body, and when heat dissipation is carried out, the high-calorific-value electrical components can be quickly dissipated, so that the heat dissipation effect is effectively improved.

Description

High-low voltage complete equipment distribution box convenient to heat dissipation
Technical Field
The utility model relates to a power equipment technical field especially relates to a high-low pressure complete sets block terminal convenient to heat dissipation.
Background
The distribution box is mostly made of rolled metal plates, is generally in a rectangular box-shaped structure, is used for installing electrical elements of a regulating circuit, completes power utilization dispatching of equipment, and can protect the electrical elements to avoid circuit damage.
The existing distribution box usually only depends on the fan arranged on the side wall of the box body to exhaust and dissipate heat, air enters the box body through the ventilation screen plate on the box body and is discharged through the heat dissipation fan, and heat is dissipated by increasing the air flow, so that the distribution box has the following defects:
because radiator fan installs on the box lateral wall, its in-process at exhaust can arouse the inside air of whole box to flow, can't realize local cooling to the position that generates heat, can not restrain the heat diffusion, is controlled the volume of airing exhaust of fan simultaneously, and radiating efficiency is lower, can't play quick radiating effect.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a high-low pressure complete sets block terminal convenient to heat dissipation.
The technical scheme of the utility model is realized like this: the utility model provides a high-low voltage complete equipment distribution box convenient for heat dissipation, which comprises a box body, a box door, an element mounting plate, a ventilation screen plate and a heat dissipation fan, wherein the front part of the box body is provided with an opening,
the box door is hinged at the front part of the box body;
the element mounting plate is fixed on the inner wall of the box body;
the ventilation screen plate is fixed on the right side wall of the box body;
the heat radiation fan is fixed on the left side wall of the box body;
also comprises a positioning plate, a supporting frame, a fan box, an exhaust fan, a connecting pipe, a pipeline joint and an induced draft pipe, wherein,
the two positioning plates are symmetrically arranged on the left and right by taking the longitudinal central line of the box body as a reference;
the supporting frame is fixed on the positioning plate;
the fan box is fixed on the outer side of the top wall of the box body;
the exhaust fan is fixed on the side wall of the fan box;
the connecting pipe is fixed on the inner side of the top wall of the box body and is communicated with the inside of the fan box;
the pipeline joint is fixed at the lower end of the connecting pipe and is communicated with the connecting pipe;
and the air inducing pipe is fixed at the lower end of the pipeline joint, is communicated with the pipeline joint and is fixedly connected with the support frame.
On the basis of the technical scheme, preferably, the positioning plate is a strip-shaped plate with an L-shaped cross section, and a plurality of notches are formed in the positioning plate.
On the basis of above technical scheme, it is preferred, the support frame includes support body and nut, the support body is worker's shape, and four tip of support body are provided with the external screw thread, and the support body sets up in the notch, the nut closes soon through its internal thread and the external screw thread of support body to be connected and support and hold the locating plate to with support frame and locating plate fixed connection.
On the basis of the technical scheme, preferably, the bottom of the fan box is opened and is abutted and fixed on the outer side of the top wall of the box body, two exhaust fans are arranged in the fan box, and the two exhaust fans are arranged on the back of the fan box.
On the basis of the technical scheme, preferably, the connecting pipe is a round cylinder, the upper port of the connecting pipe is communicated with the fan box, and the lower end of the connecting pipe is provided with a first external thread.
On the basis of the above technical scheme, preferably, the pipe joint includes a relay pipe and a threaded sleeve, the threaded sleeve is sleeved at both the upper end and the lower end of the relay pipe, the threaded sleeve can slide up and down along the relay pipe, and the threaded sleeve at the upper end of the relay pipe is screwed with the first external thread at the lower end of the connecting pipe through the internal thread of the threaded sleeve.
It is further preferred that the connecting tubes and tube fittings are arranged in a transverse array on the top wall of the tank.
On the basis of the above technical scheme, preferably, the induced draft pipe comprises a bottom pipe, a corrugated pipe and a top pipe, the corrugated pipe is arranged on the upper portion of the bottom pipe and is of an integrated structure with the bottom pipe, the top pipe is arranged on the upper portion of the corrugated pipe and is of an integrated structure with the corrugated pipe, a second external thread is further arranged at the upper end of the top pipe, and the second external thread is screwed with the internal thread of the threaded sleeve at the lower end of the relay pipe.
Further preferably, the induced draft pipe further comprises two limiting plates and two rubber buckles, the two limiting plates are fixed on the bottom pipe, a hole is reserved in the middle of each of the two limiting plates, the frame body is located in the hole of each of the two limiting plates, and the rubber buckles are sleeved on the two limiting plates so as to connect and fix the bottom pipe and the frame body.
The utility model discloses high-low pressure complete sets block terminal convenient to heat dissipation has following beneficial effect for prior art:
(1) through be provided with fan box and exhaust fan on the roof of box, still be provided with the connecting pipe that link up mutually with fan box, the induced duct is installed through pipe joint in the lower part of connecting pipe, the support frame fixed connection of induced duct and box inside, the support frame is connected fixedly with the locating plate in the box, it makes the induced duct can be with the great electric elements of the interior direct alignment of mouth of pipe box internal heating value, later utilize the exhaust fan to bleed, local convulsions are carried out, with the air mobility around the electric elements that increase heating value is big, pertinence dispels the heat, can avoid the heat at the inside diffusion of box, realize quick aeration cooling.
(2) Through utilizing two limiting plates and a rubber to detain the induced duct and fix on the support frame, the middle part of induced duct is provided with one section bellows, makes the induced duct can stretch out and draw back, detains the back with rubber, can stretch induced duct adjusting position, also can not demolish the rubber and detain, and direct pulling induced duct carries out the slide adjusting on the support frame, is convenient for remove the induced duct to the serious electrical component department of calorific capacity, has the convenient advantage of adjustment for it is more convenient to use.
(3) Through setting up connecting pipe, pipe joint and induced duct to the mode that the screw thread closes soon and connect, the induced duct utilizes two limiting plates and a rubber to detain and fixes on the support frame to support the support body of support frame through the nut and hold the locating plate and connect fixedly, it makes the radiator unit of this device have the convenient advantage of connecting, easily split between the subassembly, the subsequent maintenance clearance work of being convenient for.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a perspective view of a high-low voltage complete equipment distribution box convenient for heat dissipation of the present invention;
fig. 2 is a side view of the high-low voltage complete equipment distribution box convenient for heat dissipation of the present invention;
fig. 3 is a rear view of the high-low voltage complete equipment distribution box convenient for heat dissipation of the present invention;
fig. 4 is an internal structure diagram of the high-low voltage complete equipment distribution box convenient for heat dissipation of the present invention;
FIG. 5 is a side sectional view of the distribution box of high and low voltage complete equipment for facilitating heat dissipation according to the present invention;
fig. 6 is a top sectional view of the high-low voltage complete equipment distribution box convenient for heat dissipation of the present invention;
fig. 7 is a drawing of the disassembly structure of the induced duct of the high-low voltage complete equipment distribution box convenient for heat dissipation of the present invention;
fig. 8 is a structural diagram of a point a of the high-low voltage complete equipment distribution box convenient for heat dissipation of the present invention;
fig. 9 is a B-point structural diagram of the high-low voltage complete equipment distribution box convenient for heat dissipation of the present invention;
fig. 10 is a connection structure diagram of a connecting pipe, a pipe joint and an induced duct of the high-low voltage complete equipment distribution box convenient for heat dissipation according to the present invention;
fig. 11 is a longitudinal sectional view of a pipe joint of a high-low voltage complete equipment distribution box convenient for heat dissipation according to the present invention;
fig. 12 is the positioning plate structure diagram of the high-low voltage complete equipment distribution box convenient for heat dissipation of the utility model.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
As shown in fig. 1-12, the utility model discloses a high-low pressure complete sets block terminal convenient to heat dissipation, including box 1, chamber door 2, component mounting panel 3, ventilation otter board 4, radiator fan 5, locating plate 6, support frame 7, fan box 8, exhaust fan 9, connecting pipe 10, pipe joint 11 and induced duct 12.
The box body 1, the box door 2, the element mounting plate 3, the ventilation screen plate 4 and the cooling fan 5 are the prior art, the box door 2 is hinged to the front portion of the box body 1, the sealed box body 1 is used for protecting internal electric elements, the element mounting plate 3 is used for mounting the electric elements to regulate and control circuits, the ventilation screen plate 4 is used for ventilation of the box body 1, the cooling fan 5 is used for exhausting and cooling, the positioning plate 6, the support frame 7, the fan box 8, the exhaust fan 9, the connecting pipe 10, the pipeline joint 11 and the induced draft pipe 12 are fixed on the box body 1 and used for internal cooling of the box body 1.
In the present embodiment, as a preferable mode, the positioning plates 6 are fixed on the inner wall of the box body 1, and two positioning plates 6 are symmetrically arranged on the left and right with the longitudinal center line of the box body 1 as a reference; the supporting frame 7 is fixed on the positioning plate 6; the fan box 8 is fixed on the outer side of the top wall of the box body 1; the exhaust fan 9 is fixed on the side wall of the fan box 8; the connecting pipe 10 is fixed on the inner side of the top wall of the box body 1, and the connecting pipe 10 is communicated with the inside of the fan box 8; the pipeline joint 11 is fixed at the lower end of the connecting pipe 10, and the pipeline joint 11 is communicated with the connecting pipe 10; induced duct 12 fixes at the lower extreme of pipe joint 11, and induced duct 12 link up with pipe joint 11, the lower extreme and the support frame 7 fixed connection of induced duct 12, the setting of this structure for exhaust fan 9 can directly carry out convulsions exhaust to calorific capacity comparatively serious region through connecting pipe 10, pipe joint 11 and induced duct 12, thereby effectively suppresses the heat diffusion, improves the radiating efficiency.
In this embodiment, as a preferable mode, the positioning plate 6 is a strip-shaped plate with an L-shaped cross section, the positioning plate 6 is provided with a plurality of notches 601, the support frame 7 includes a frame body 701 and a nut 702, the frame body 701 is in an i-shaped shape, external threads 703 are provided at four ends of the frame body 701, the frame body 701 is disposed in the notches 601, and the nut 702 is screwed with the external threads 703 of the frame body 701 through the internal threads thereof and abuts against the positioning plate 6; the plurality of notches 601 on the positioning plate 6 enable the supporting frame 7 to be adjusted in height, so that the induced duct 12 can be adjusted in position, and the adjustment is convenient.
In this embodiment, as an optimal mode, the bottom of the fan box 8 is open and fixed on the outer side of the top wall of the box 1 in a propping manner, so that the connecting pipe 10 can be communicated with the inside of the fan box 8, two exhaust fans 9 are arranged in the fan box 8, and the two exhaust fans 9 are both arranged on the back of the fan box 8 for exhausting and radiating, because the two exhaust fans 9 are arranged in the same plane, one of the two exhaust fans can increase the exhaust amount, and the other exhaust fan can improve the fluency of the gas movement, thereby ensuring the radiating effect.
In this embodiment, as a preferable mode, the connection pipe 10 is a circular cylinder, an upper port of the connection pipe 10 is communicated with the fan box 8, and a first external thread 1001 is provided at a lower end of the connection pipe 10; the pipe joint 11 comprises a relay pipe 1101 and a threaded sleeve 1102, wherein the upper end and the lower end of the relay pipe 1101 are respectively sleeved with one threaded sleeve 1102, the threaded sleeves 1102 can slide up and down along the relay pipe 1101, and the threaded sleeve 1102 at the upper end of the relay pipe 1101 is screwed and connected with a first external thread 1001 at the lower end of a connecting pipe 10 through internal threads of the threaded sleeve 1102; the induced draft pipe 12 comprises a bottom pipe 1201, a corrugated pipe 1202 and a top pipe 1203, the corrugated pipe 1202 is arranged at the upper part of the bottom pipe 1201, the corrugated pipe 1202 and the bottom pipe 1201 are of an integrated structure, the top pipe 1203 is arranged at the upper part of the corrugated pipe 1202, the top pipe 1203 and the corrugated pipe 1202 are of an integrated structure, the upper end of the top pipe 1203 is further provided with a second external thread 1204, and the second external thread 1204 is screwed with the internal thread of the threaded sleeve 1102 at the lower end of the relay pipe 1101; through connecting the installation with connecting pipe 10, pipe joint 11 and induced duct 12 three through the screw thread closure mode soon, it has the convenient advantage of dismouting, easily follows up clears up connecting pipe 10, pipe joint 11 and induced duct 12, still conveniently maintains the work with its electric elements who demolishs the back to box 1 inside simultaneously.
In this embodiment, as a preferable mode, the connecting pipes 10 and the pipe joints 11 are arranged on the top wall of the box body 1 in a transverse array; the installation of a plurality of induced ducts 12 is convenient for carrying out local heat dissipation on a plurality of areas in the box body 1 so as to deal with the situation that a plurality of electric elements with large heat productivity exist in the box body 1.
In this embodiment, as a preferable mode, the induced duct 12 further includes two position-limiting plates 1205 and two rubber buckles 1206, two of the position-limiting plates 1205 are fixed on the bottom pipe 1201, a gap is reserved in the middle of the two position-limiting plates 1205, the frame body 701 is located in the gap of the two position-limiting plates 1205, and the rubber buckles 1206 are sleeved on the two position-limiting plates 1205 to connect and fix the bottom pipe 1201 and the frame body 701; through dismantling rubber buckle 1206, just can take off induced duct 12 and carry out position control, also can not dismantle rubber buckle 1206, direct pulling induced duct 12 removes along support body 701 of support frame 7 and adjusts.
The method comprises the following specific implementation steps:
the component mounting plate 3 in the box body 1 is used for mounting an electrical component, so that a circuit is regulated and controlled, the box door 2 is used for sealing the box body 1 and protecting the electrical component, the ventilation screen plate 4 and the cooling fan 5 are used for exhausting and cooling the inside of the box body 1, the fan box 8 is arranged on the outer side of the top wall of the box body 1, the exhaust fan 9 is fixed on the side wall of the fan box 8, the connecting pipe 10 is fixed on the inner side of the top wall of the box body 1, the connecting pipe 10 is communicated with the fan box 8, the connecting pipe 10 is connected with the threaded sleeve 1102 at the upper end of the relay pipe 1101 through the first external thread 1001 at the lower end, the threaded sleeve 1102 at the lower end of the relay pipe 1101 is connected with the second external thread 1204 on the top pipe 1203, and therefore the connection among the connecting pipe 10, the pipeline joint 11 and the induced duct 12 is completed; the induced draft pipe 12 comprises a bottom pipe 1201, a corrugated pipe 1202 and a top pipe 1203, the bottom pipe 1201 and the top pipe 1203 are respectively positioned at the lower end and the upper end of the corrugated pipe 1202, the corrugated pipe 1202 enables the air pipe 12 to be stretched and adjusted, and the bottom pipe 1201 is convenient to align to an electric element with large heat productivity; when the air cooling box works, the exhaust fan 9 is used for exhausting air, heat generated by electrical elements in the box body 1 can enter the fan box 8 through the bottom pipe 1201, the corrugated pipe 1202, the top pipe 1203, the pipeline joint 11 and the connecting pipe 10 in sequence along with air, and is finally exhausted through the exhaust fan 9, so that rapid heat dissipation for a high-heating-value area is realized, heat diffusion can be restrained, and a good cooling effect is achieved; the connecting pipe 10, the pipeline joint 11 and the induced draft pipe 12 are connected in a threaded screwing mode, so that the box has the advantages of convenience in disassembly and assembly, convenience in maintenance and cleaning and convenience in maintenance and repair of electric elements in the box body 1; the positioning plate 6 and the support frame 7 are arranged in the box body 1, the frame body 701 of the support frame 7 is arranged in the notch 601 of the mounting frame 6, then the nut 702 is rotated to be abutted against the positioning plate 6, so that the connection and the fixation of the positioning plate 6 and the support frame 7 can be completed, because the positioning plate 6 is provided with a plurality of notches 601, the height of the supporting frame 7 can be freely adjusted, the bottom tube 1201 of the induced duct 12 is provided with two limiting plates 1205, the two limiting plates 1205 are fixedly connected with the frame body 701 of the supporting frame 7 through rubber buttons 1206, the induced duct 12 can be adjusted in height along with the supporting frame 7, the heat dissipation of the electrical elements with high heat productivity is convenient, after the rubber buttons 1206 are disassembled, the position of the bottom tube 1201 on the support frame 7 can be adjusted, the rubber buckle 1206 can also be not detached, the bottom tube 1201 is directly pulled to move transversely on the frame body 701 of the support frame 7, and the adjustable bottom tube support frame has the advantages of convenience in adjustment and easiness in detachment.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A high-low voltage complete equipment distribution box convenient for heat dissipation comprises a box body (1), a box door (2), an element mounting plate (3), a ventilation screen plate (4) and a heat dissipation fan (5), wherein the front part of the box body (1) is provided with an opening,
the box door (2) is hinged at the front part of the box body (1);
the element mounting plate (3) is fixed on the inner wall of the box body (1);
the ventilation screen plate (4) is fixed on the right side wall of the box body (1);
the heat radiation fan (5) is fixed on the left side wall of the box body (1);
the method is characterized in that: also comprises a positioning plate (6), a supporting frame (7), a fan box (8), an exhaust fan (9), a connecting pipe (10), a pipeline joint (11) and an induced draft pipe (12), wherein,
the positioning plates (6) are fixed on the inner wall of the box body (1), and the two positioning plates (6) are arranged in a bilateral symmetry mode by taking the longitudinal center line of the box body (1) as a reference;
the supporting frame (7) is fixed on the positioning plate (6);
the fan box (8) is fixed on the outer side of the top wall of the box body (1);
the exhaust fan (9) is fixed on the side wall of the fan box (8);
the connecting pipe (10) is fixed on the inner side of the top wall of the box body (1), and the connecting pipe (10) is communicated with the inside of the fan box (8);
the pipeline joint (11) is fixed at the lower end of the connecting pipe (10), and the pipeline joint (11) is communicated with the connecting pipe (10);
and the induced draft pipe (12) is fixed at the lower end of the pipeline joint (11), the induced draft pipe (12) is communicated with the pipeline joint (11), and the lower end of the induced draft pipe (12) is fixedly connected with the support frame (7).
2. The high-low voltage complete equipment distribution box convenient for heat dissipation of claim 1, characterized in that: the positioning plate (6) is a strip-shaped plate with an L-shaped cross section, and a plurality of notches (601) are formed in the positioning plate (6).
3. The high-low voltage complete equipment distribution box convenient for heat dissipation of claim 2, wherein: the support frame (7) comprises a frame body (701) and a nut (702), the frame body (701) is in an I-shaped shape, external threads (703) are arranged at four end portions of the frame body (701), the frame body (701) is arranged in the notch (601), and the nut (702) is connected with the external threads (703) of the frame body (701) in a screwing mode through internal threads of the nut and abuts against the positioning plate (6) so as to fixedly connect the support frame (7) and the positioning plate (6).
4. The high-low voltage complete equipment distribution box convenient for heat dissipation of claim 3, wherein: the bottom of the fan box (8) is opened and is supported and fixed on the outer side of the top wall of the box body (1), two exhaust fans (9) are arranged in the fan box (8), and the two exhaust fans (9) are arranged on the back of the fan box (8).
5. The high-low voltage complete equipment distribution box convenient for heat dissipation of claim 4, wherein: the connecting pipe (10) is a round cylinder, the upper end opening of the connecting pipe (10) is communicated with the fan box (8), and a first external thread (1001) is arranged at the lower end of the connecting pipe (10).
6. The high-low voltage complete equipment distribution box convenient for heat dissipation of claim 5, characterized in that: the pipeline joint (11) comprises a relay pipe (1101) and a threaded sleeve (1102), wherein the threaded sleeve (1102) is sleeved at the upper end and the lower end of the relay pipe (1101), the threaded sleeve (1102) can slide up and down along the relay pipe (1101), and the threaded sleeve (1102) at the upper end of the relay pipe (1101) is screwed and connected with a first external thread (1001) at the lower end of the connecting pipe (10) through an internal thread of the threaded sleeve (1102).
7. The high-low voltage complete equipment distribution box convenient for heat dissipation of claim 6, wherein: the connecting pipes (10) and the pipeline joints (11) are arranged on the top wall of the box body (1) in a transverse array mode.
8. The high-low voltage complete equipment distribution box convenient for heat dissipation according to claim 6 or 7, characterized in that: the induced draft pipe (12) comprises a bottom pipe (1201), a corrugated pipe (1202) and a top pipe (1203), the corrugated pipe (1202) is arranged on the upper portion of the bottom pipe (1201), the corrugated pipe (1202) and the bottom pipe (1201) are of an integrated structure, the top pipe (1203) is arranged on the upper portion of the corrugated pipe (1202), the top pipe (1203) and the corrugated pipe (1202) are of an integrated structure, a second external thread (1204) is further arranged at the upper end of the top pipe (1203), and the second external thread (1204) is screwed with an internal thread of a threaded sleeve (1102) at the lower end of the relay pipe (1101).
9. The high-low voltage complete equipment distribution box convenient for heat dissipation of claim 8, characterized in that: induced duct (12) still include limiting plate (1205) and rubber and detain (1206), limiting plate (1205) are fixed with two on bottom tube (1201), and the hole is left at the middle part of two limiting plate (1205), and support body (701) are located the hole of two limiting plate (1205), and rubber detains (1206) and overlaps to two limiting plate (1205) on to be connected bottom tube (1201) and support body (701) fixedly.
CN202220670443.1U 2022-03-22 2022-03-22 High-low voltage complete equipment distribution box convenient to heat dissipation Active CN217387961U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220670443.1U CN217387961U (en) 2022-03-22 2022-03-22 High-low voltage complete equipment distribution box convenient to heat dissipation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220670443.1U CN217387961U (en) 2022-03-22 2022-03-22 High-low voltage complete equipment distribution box convenient to heat dissipation

Publications (1)

Publication Number Publication Date
CN217387961U true CN217387961U (en) 2022-09-06

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ID=83105575

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220670443.1U Active CN217387961U (en) 2022-03-22 2022-03-22 High-low voltage complete equipment distribution box convenient to heat dissipation

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Country Link
CN (1) CN217387961U (en)

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