Heat dissipation device of high-voltage power distribution cabinet

Abstract

The invention, which relates to the technical field of high-voltage power distribution cabinet heat dissipation, provides a high-voltage power distribution cabinet heat dissipation apparatus comprising a power distribution cabinet main body, a U-shaped air distribution assembly, a heat dissipation channel, an adjustable air flow channel and a cold air shunting assembly. According to the invention, the interior of the power distribution cabinet main body is divided into the power distribution area and the heat dissipation distribution area by adjusting the installation positions of the porous installation frame and the power distribution element installation transverse frame in the power distribution cabinet main body, the U-shaped gas distribution assembly is installed in the heat dissipation distribution area, and the heat dissipation channel and the U-shaped gas distribution assembly form a circulation channel. According to the invention, the heat dissipation distribution area is independently designed, and the cold air shunting assembly is used for shunting design, so that during specific application, a user can adjust the installation position of the cold air distribution shell of the cold air shunting assembly, and efficient heat dissipation of the installation position of the power distribution element which is easy to heat or highly heat is realized.

Description

Technical Field

[0001] The invention relates to the technical field of heat dissipation of high-voltage power distribution cabinets, and in particular to a heat dissipation device for a high-voltage power distribution cabinet. Background Art

[0002] High-voltage distribution cabinets are key equipment for electric energy distribution in power systems. Various distribution components are installed inside them. During use, each electrical component will generate heat. If the heat cannot be absorbed in time, the heat will have a concentrated effect, further affecting the work of the electrical components, and even causing heating and damage to the electrical components, fire and other problems. It is very necessary to equip the high-voltage distribution cabinet with a heat dissipation device.

[0003] When the high-voltage distribution cabinet is actually used, the installation position and installation quantity of the internal electrical components need to be specifically designed. Therefore, the internal heat dissipation structures of many existing special high-voltage distribution cabinets are specially designed and have good heat dissipation effect. However, the internal heat dissipation effect of general / universal high-voltage distribution cabinets is obviously insufficient. The only way is to place the heat-prone / high-heat-generating distribution components as close to the heat dissipation outlet as possible. In actual use, the high-voltage distribution cabinet will frequently overheat. For this reason, the present invention provides a heat dissipation device for a high-voltage distribution cabinet. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a high-voltage distribution cabinet heat dissipation device, which solves the problem that the internal heat dissipation effect of a general / universal high-voltage distribution cabinet is obviously insufficient. The heat-prone / high-heat-generating distribution components can only be placed as close to the heat dissipation outlet as possible. In actual use, the high-voltage distribution cabinet will frequently overheat.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A heat dissipation device for a high-voltage power distribution cabinet, comprising:

[0007] A power distribution cabinet body, wherein the inner side wall of the power distribution cabinet body is fixedly connected with a multi-hole mounting frame, and a power distribution component mounting cross frame is fixedly mounted on the multi-hole mounting frame by bolts, and the multi-hole mounting frame and the power distribution component mounting cross frame divide the interior of the power distribution cabinet body into a power distribution area and a heat dissipation distribution area, and the power distribution area is close to the door frame of the power distribution cabinet body;

[0008] A U-shaped air distribution component, wherein the U-shaped air distribution component is fixedly mounted on the inner side of the heat dissipation distribution area, wherein the two top ends of the U-shaped air distribution component are respectively a first air inlet end and a first air outlet end, a first air inlet is provided on the side of the U-shaped air distribution component and close to the first air inlet end, and a second air inlet is provided on the side of the U-shaped air distribution component and close to the first air outlet end;

[0009] A heat dissipation channel, wherein a mounting platform opening is provided on the top outer side of the power distribution cabinet body, the heat dissipation channel is fixedly installed on the inner side of the mounting platform opening, and the two ends of the heat dissipation channel are respectively connected to the first air inlet end and the first air outlet end of the U-shaped air distribution component, and at least one fan component is installed on the heat dissipation channel;

[0010] An adjustable air flow passage, the adjustable air flow passage being installed at a position of the U-shaped air distribution assembly close to the second air inlet;

[0011] A cold air diversion component, one end of which is connected to the U-shaped air distribution component and is located between the adjustable air flow channel and the first air inlet, and the air outlet end of the cold air diversion component is arranged in the power distribution area.

[0012] Preferably, the heat dissipation channel includes:

[0013] A channel housing, wherein the bottoms of both ends of the channel housing are respectively provided with a second air inlet end and a second air outlet end, the second air inlet end is connected to the first air outlet end, and the second air outlet end is connected to the first air inlet end;

[0014] The channel housing has a first side surface and a second side surface which are arranged in parallel, a plurality of first notches are equidistantly formed on the first side surface of the channel housing, a plurality of second notches are equidistantly formed on the second side surface of the channel housing, and the first notches are staggered with the second notches;

[0015] The first recess and the second recess are both fixedly connected with a thermoelectric cooling module, and the cooling side of the thermoelectric cooling module faces the inner side of the first recess and the second recess.

[0016] Preferably, the number of the fan assemblies is not greater than the number of the first recesses, and the fan assemblies are installed on the second side surface of the channel housing, and the positions of the fan assemblies correspond to the positions of the first recesses.

[0017] Preferably, a backflow prevention component is fixedly connected to the inner side of the U-shaped air distribution assembly and located at a position corresponding to the first air inlet, and the backflow prevention component is in an inverted "L" shape.

[0018] Preferably, the cold air diversion component comprises:

[0019] An airway tube, wherein a plurality of air outlet interfaces are arranged on the side of the U-shaped air distribution assembly, and a first end of the airway tube is connected to the air outlet interface of the U-shaped air distribution assembly;

[0020] A cold air distribution shell, wherein the end of the cold air distribution shell is fixedly connected with a connecting ear, and the connecting ear is fixedly installed with a porous mounting frame by bolts, and air holes are opened on one side / both sides of the upper and lower sides of the cold air distribution shell, and the second end of the airway pipe is connected with the cold air distribution shell;

[0021] The air outlet interface that is not connected to the airway tube is fixedly installed with a blocking plate.

[0022] Preferably, the adjustable airflow channel comprises:

[0023] A first blocking block, wherein the cross-sectional shape of the U-shaped air distribution component is rectangular, the inner side of the U-shaped air distribution component has a third side surface and a fourth side surface which are parallel to each other, the first blocking block is fixedly mounted on the third side surface of the U-shaped air distribution component, and a first inclined surface which is inclined upward is provided on a side of the first blocking block away from the third side surface of the U-shaped air distribution component;

[0024] A second blocking block, wherein a sliding opening is provided on the fourth side surface of the U-shaped gas distribution assembly, a connecting block is fixedly connected to the back surface of the second blocking block, a second inclined surface parallel to the first inclined surface is provided on the front surface of the second blocking block, and the connecting block is located inside the sliding opening and slides;

[0025] The cover shell is slidably connected to the outer side of the U-shaped gas distribution assembly, and a rectangular hole is opened on the side of the cover shell. One end of the connecting block passes through the rectangular hole and is installed with a pressure block through a rotating shaft. A torsion spring is sleeved on the rotating shaft, and the first end of the torsion spring is against the inner side of the connecting block, and the second end of the torsion spring is clamped on the outer side of the pressure block.

[0026] Preferably, the cover is a C-shaped structure surrounded on three sides.

[0027] Preferably, a filter-drying assembly is provided inside the U-shaped air distribution assembly and / or inside the cold air diversion assembly, and a silica gel desiccant is provided on the screen of the filter-drying assembly.

[0028] Preferably, the power distribution cabinet body is provided with terminals inside for supplying power to the thermoelectric cooling module of the heat dissipation channel.

[0029] Preferably, an outer cover is hingedly installed at the top mounting platform of the power distribution cabinet body, and the heat dissipation channel is located inside the outer cover.

[0030] The present invention provides a high-voltage power distribution cabinet heat dissipation device, which has the following beneficial effects:

[0031] 1. The present invention divides the interior of the power distribution cabinet body into a power distribution area and a heat dissipation distribution area by adjusting the installation positions of the multi-hole mounting frame and the distribution element mounting cross frame inside the power distribution cabinet body. A U-shaped air distribution assembly is installed in the heat dissipation distribution area, and a heat dissipation channel is installed at the external mounting platform of the power distribution cabinet body. The heat dissipation channel and the U-shaped air distribution assembly form a circulation channel. At least one fan assembly installed on the heat dissipation channel drives air circulation. The air in the power distribution cabinet body is sucked into the circulation channel from the second air inlet on the side of the U-shaped air distribution assembly, and heat exchange is completed in the heat dissipation channel. When the refrigerated gas flows through the first air inlet, a negative pressure is generated at the first air inlet by relying on the Bernoulli principle. The gas inside the power distribution cabinet body will be sucked into the U-shaped air distribution assembly and mixed with the refrigeration gas to form a cooled gas, and then The distribution components are cooled by excluding the cooled air from the cold air diversion component, and an adjustable air flow duct is designed to adjust the air flow rate of the cooled gas that flows back into the circulation for a second time. When efficient heat dissipation is required, the adjustable air flow duct can be adjusted less, and as much air as possible from the second air inlet is sucked into the main body of the distribution cabinet. When heat dissipation does not require efficient heat dissipation, the adjustable air flow duct can be adjusted slightly larger to allow a larger amount of air to flow back into the circulation for a second time, and a smaller amount of gas is sucked into the main body of the distribution cabinet from the second air inlet, which is more energy-efficient. Since the present invention separately designs the heat dissipation distribution area, and the diversion design is performed by the cold air diversion component, in specific applications, the user can adjust the installation position of the cold air distribution shell of the cold air diversion component to achieve efficient heat dissipation at the installation location of the distribution components that are prone to heat / high heat.

[0032] 2. The present invention designs a specific structure of the heat dissipation channel, with staggered first notches and second notches on both sides, so that the channel shape inside the channel shell is a multi-fold linear curved channel, which can better achieve heat exchange with the thermoelectric refrigeration module, and there are multiple thermoelectric refrigeration modules, and at least one can be selected and opened according to actual needs, so that it is more applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A three-dimensional diagram of a high-voltage power distribution cabinet heat dissipation device proposed by the present invention installed in a power distribution cabinet;

[0034] Figure 2 A front view of a high-voltage power distribution cabinet heat dissipation device proposed by the present invention installed in a power distribution cabinet;

[0035] Figure 3 A three-dimensional schematic diagram of a heat dissipation device for a high-voltage power distribution cabinet proposed by the present invention;

[0036] Figure 4 for Figure 3 A partial enlarged view in the middle;

[0037] Figure 5This is a front view of a heat dissipation device for a high-voltage power distribution cabinet proposed by the present invention;

[0038] Figure 6 for Figure 5 Section view of the section line at CC;

[0039] Figure 7 A cross-sectional view of a heat dissipation device for a high-voltage power distribution cabinet proposed by the present invention;

[0040] Figure 8 for Figure 7 A partial enlarged view of point B in the middle.

[0041] Among them, 1. Power distribution cabinet body; 2. Multi-hole mounting frame; 3. Power distribution component mounting cross frame; 4. Mounting platform; 5. U-shaped air distribution assembly; 6. Heat dissipation channel; 601. Channel shell; 602. First recess; 603. Second recess; 604. Thermoelectric cooling module; 7. First air inlet; 8. Second air inlet; 9. Anti-backflow component; 10. Cold air diversion assembly; 1001. Airway pipe; 1002. Cold air Distribution shell; 1002a, connecting ear; 1002b, air hole; 11, fan assembly; 12, adjustable air flow channel; 1201, first blocking block; 1202, second blocking block; 1203, sliding port; 1204, connecting block; 1205, cover; 1206, pressure block; 1207, torsion spring; 1207a, first end; 1207b, second end; a, power distribution area; b, heat dissipation distribution area. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Embodiment 1:

[0044] like Figure 1-Figure 8 As shown, an embodiment of the present invention provides a high-voltage power distribution cabinet heat dissipation device, including: a power distribution cabinet body 1, a U-shaped air distribution component 5, a heat dissipation channel 6, an adjustable air flow channel 12 and a cold air diversion component 10.

[0045] Among them, the inner wall of the distribution cabinet body 1 is fixedly connected with a porous mounting frame 2, and two groups of porous mounting frames 2 are symmetrically arranged. A distribution element mounting cross frame 3 is fixedly installed on the porous mounting frame 2 by bolts, and the two ends of the distribution element mounting cross frame 3 correspond to the two groups of porous mounting frames 2. The distribution element mounting cross frame 3 is used to install the distribution element.

[0046] During actual use, the number and installation positions of the distribution component mounting cross frames 3 are designed according to the specific installation requirements inside the distribution cabinet. The multi-hole mounting frame 2 and the distribution component mounting cross frames 3 divide the interior of the distribution cabinet body 1 into a distribution area a and a heat dissipation distribution area b. The distribution area a is close to the door frame of the distribution cabinet body 1, and the heat dissipation distribution area b is close to the inner bottom of the distribution cabinet body 1. The U-shaped air distribution component 5 is fixedly installed on the inner side of the heat dissipation distribution area b. The two top ends of the U-shaped air distribution component 5 extend out of the distribution cabinet body 1. The two top ends of the U-shaped air distribution component 5 are respectively a first air inlet end and a first air outlet end. A first air inlet 7 is provided on the side of the U-shaped air distribution component 5 and close to the first air inlet end. A second air inlet 8 is provided on the side of the U-shaped air distribution component 5 and close to the first air outlet end. The first air inlet 7 and the second air inlet 8 are both used to inhale hot air from the inside of the distribution cabinet body 1 into the circulation channel formed by the U-shaped air distribution component 5 and the heat dissipation channel 6. The top of the distribution cabinet body 1 An installation platform opening 4 is opened on the outside, and the heat dissipation channel 6 is fixedly installed on the inner side of the installation platform opening 4, and the two ends of the heat dissipation channel 6 are respectively connected to the first air inlet end and the first air outlet end of the U-shaped air distribution component 5. At least one fan component 11 is installed on the heat dissipation channel 6. The U-shaped air distribution component 5 and the heat dissipation channel 6 form an annular circulation air duct. The fan component 11 provides driving force for the airflow inside the circulation air duct. The adjustable air flow duct 12 is installed at a position of the U-shaped air distribution component 5 close to the second air inlet 8. The adjustable air flow duct 12 is used to control the airflow of the secondary circulation, that is, to control the amount of air entering from the second air inlet 8. One end of the cold air diversion component 10 is connected to the U-shaped air distribution component 5 and is located between the adjustable air flow duct 12 and the first air inlet 7, and the air outlet end of the cold air diversion component 10 is set in the power distribution area a. The specific position of the cold air diversion component 10 is designed according to actual needs. It is preferred to set the air outlet of the cold air diversion component 10 near the power distribution components that are prone to heat / high heat.

[0047] When in use, the fan assembly 11 is powered on and operates, and it draws hot air from the inside of the distribution cabinet body 1 through the second air inlet 8. The hot air passes through the heat dissipation channel 6, and the hot air exchanges heat with the thermoelectric refrigeration module 604, so that the hot air is cooled down to become cold air, and is accelerated to be transported to the first air inlet end of the U-shaped air distribution assembly 5. When passing near the first air inlet 7, the Bernoulli principle is used to generate negative pressure at the first air inlet 7, so that the hot air inside the distribution cabinet body 1 is extracted from the first air inlet 7. This stream of hot air is mixed with the cold air and blown out through the cold air diversion assembly 10, and blown near the distribution components that are prone to heat / high heat, so as to achieve efficient heat dissipation of the distribution components that are prone to heat / high heat, and because the airflow near the first air inlet 7 and the second air inlet 8 in the heat dissipation distribution area b is drawn away, the airflow inside the distribution cabinet body 1 is triggered to achieve heat dissipation inside the entire distribution cabinet body 1.

[0048] The heat dissipation channel 6 includes: a channel housing 601 , a first recess 602 , a second recess 603 and a thermoelectric cooling module 604 .

[0049] The thermoelectric cooling module 604 has a cooling side and a heating side. The working principle of the two is based on the Peltier effect. When DC current passes through the thermoelectric cooling module, one side (cold side) will absorb heat, causing the temperature to drop, while the other side (hot side) will release heat, causing the temperature to rise. The heat dissipation channel 6 is designed to be installed on the outside of the distribution cabinet body 1. Its purpose is also to enable the heating side of the thermoelectric cooling module 604 to dissipate heat better, and the heating side of the thermoelectric cooling module 604 will not affect the inside of the distribution cabinet body 1.

[0050] The second air inlet end and the second air outlet end are respectively provided at the bottom of both ends of the channel shell 601, the second air inlet end is connected to the first air outlet end, and the second air outlet end is connected to the first air inlet end. The channel shell 601 and the U-shaped air distribution component 5 form an annular circulation channel, the channel shell 601 has a first side surface and a second side surface arranged in parallel, the first side surface of the channel shell 601 is equidistantly provided with a plurality of first recesses 602, and the second side surface of the channel shell 601 is equidistantly provided with a plurality of second recesses 603, the first recesses 602 and the second recesses 603 are staggered with each other, so that the interior of the channel shell 601 forms a linear channel in the shape of a multi-fold line, and the interiors of the first recess 602 and the second recess 603 are fixedly connected with a thermoelectric cooling module 604, the cooling side of the thermoelectric cooling module 604 faces the inner sides of the first recess 602 and the second recess 603, that is, the heating side of the thermoelectric cooling module 604 is away from the inner sides of the first recess 602 and the second recess 603.

[0051] In one embodiment, the number of fan assemblies 11 is not greater than the number of first recesses 602, and the fan assemblies 11 are installed on the second side of the channel housing 601, and the positions of the fan assemblies 11 correspond to the positions of the first recesses 602. For example, the fan assemblies 11 and the first recesses 602 are each arranged in two groups, and the second recesses 603 are arranged in three groups.

[0052] When in use, the fan assembly 11 is started to drive the air flow inside the channel shell 601. When the air flow passes through the positions corresponding to the first recess 602 and the second recess 603, the air flow exchanges heat with the cooling side of the thermoelectric cooling module 604 to achieve cooling of the air flow.

[0053] In one embodiment, a backflow prevention member 9 is fixedly connected to the inner side of the U-shaped air distribution assembly 5 and located at a position corresponding to the first air inlet 7. The backflow prevention member 9 is in an inverted "L" shape.

[0054] In one embodiment, the cold air distribution assembly 10 includes: an airway pipe 1001 and a cold air distribution shell 1002 .

[0055] The air duct pipe 1001 can be a flexible pipe or a retractable rigid pipe. Generally, a plurality of air outlet interfaces are arranged on the side of the U-shaped air distribution component 5. The first end of the air duct pipe 1001 is connected to the air outlet interface of the U-shaped air distribution component 5, and the second end of the air duct pipe 1001 is connected to the cold air distribution shell 1002. The cold air passes through the air duct pipe 1001 and then enters the cold air distribution shell 1002. Air holes 1002b are provided on one side / both sides of the upper and lower sides of the cold air distribution shell 1002. The air holes 1002b are a plurality of densely distributed holes. The cold air flows out through the air holes 1002b and blows onto the distribution components to cool down the distribution components. The end of the cold air distribution shell 1002 is fixedly connected with a connecting ear 1002a, and the connecting ear 1002a is fixedly installed with the porous mounting frame 2 by bolts. The installation position of the cold air distribution shell 1002 can be adjusted according to actual needs.

[0056] like Figure 3 As shown in the figure, four air outlet interfaces are arranged on the horizontal part of the bottom of the U-shaped air distribution component 5, two of which are connected to the cold air diversion component 10. In order to ensure the rational use of the cold air flow, the air outlet interface not connected to the air duct tube 1001 is fixedly installed with a blocking plate to block the air outlet interface not connected to the air duct tube 1001.

[0057] In one embodiment, the adjustable air flow channel 12 includes: a first blocking block 1201 , a second blocking block 1202 , a cover 1205 , a pressing block 1206 and a torsion spring 1207 .

[0058] The cross-sectional shape of the U-shaped air distribution component 5 is rectangular, and the inner side of the U-shaped air distribution component 5 has a third side surface and a fourth side surface parallel to each other. The first blocking block 1201 is fixedly installed on the third side surface of the U-shaped air distribution component 5, and a first inclined surface obliquely upward is provided on the side of the first blocking block 1201 away from the third side surface of the U-shaped air distribution component 5, and a sliding opening 1203 is provided on the fourth side surface of the U-shaped air distribution component 5, and a connecting block 1204 is fixedly connected to the back side of the second blocking block 1202, and a second inclined surface parallel to the first inclined surface is provided on the front side of the second blocking block 1202, and the connecting block 1204 slides on the inner side of the sliding opening 1203, and the position of the second blocking block 1202 can be slidably adjusted, thereby adjusting the distance between the first inclined surface and the second inclined surface, that is, the cross-sectional area of ​​the air flow channel is adjustable, and the cover shell 1205 is slidably connected to the outer side of the U-shaped air distribution component 5, and the cover shell 1205 is used to block The sliding opening 1203 is blocked, and a rectangular hole is provided on the side of the cover shell 1205. One end of the connecting block 1204 passes through the rectangular hole and is then rotated by a rotating shaft to install a pressing block 1206. A torsion spring 1207 is sleeved on the rotating shaft. The first end 1207a of the torsion spring 1207 is against the inner side of the connecting block 1204, and the second end 1207b of the torsion spring 1207 is stuck on the outer side of the pressing block 1206. Under the action of the torsion spring 1207, the bottom of the pressing block 1206 squeezes the cover shell 1205, and the cover shell 1205 and the U-shaped gas distribution component 5 are squeezed and contacted with each other, thereby fixing the cover shell 1205 and the U-shaped gas distribution component 5. When it is necessary to adjust the position of the second blocking block 1202, the pressing block 1206 can be lifted from the bottom to overcome the elastic force of the torsion spring 1207, and then the cover shell 1205 can be slidably adjusted, and the second blocking block 1202 slides up and down together with the cover shell 1205 to adjust its position.

[0059] In one embodiment, the cover 1205 is a C-shaped structure surrounded on three sides, so that the cover 1205 can better cover the sliding opening 1203 .

[0060] In one embodiment, a filter-drying assembly is provided inside the U-shaped air distribution assembly 5 or / and inside the cold air diversion assembly 10, and a silica gel desiccant is provided on the screen of the filter-drying assembly. The silica gel desiccant has the advantages of high moisture absorption performance, strong stability, reusability, high safety, good thermal stability, etc.

[0061] In one embodiment, a terminal for supplying power to the thermoelectric cooling module 604 of the heat dissipation channel 6 is provided inside the power distribution cabinet body 1 , and the thermoelectric cooling module 604 of the heat dissipation channel 6 is supplied with power by the power supply inside the power distribution cabinet body 1 .

[0062] In one embodiment, a cover (not shown in the drawings) is hingedly mounted at the top mounting platform 4 of the power distribution cabinet body 1, and the heat dissipation channel 6 is located inside the cover. The cover is a mesh structure and plays a protective role.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage power distribution cabinet heat dissipation device, comprising: A power distribution cabinet body (1), wherein the inner side wall of the power distribution cabinet body (1) is fixedly connected to a multi-hole mounting frame (2), and a power distribution component mounting cross frame (3) is fixedly mounted on the multi-hole mounting frame (2) by bolts; The invention is characterized in that the multi-hole mounting frame (2) and the distribution element mounting horizontal frame (3) divide the interior of the distribution cabinet body (1) into a distribution area (a) and a heat dissipation distribution area (b), and the distribution area (a) is close to the door frame of the distribution cabinet body (1), and further comprises: A U-shaped air distribution component (5), the U-shaped air distribution component (5) is fixedly mounted on the inner side of the heat dissipation distribution area (b), the two top ends of the U-shaped air distribution component (5) are respectively a first air inlet end and a first air outlet end, a first air inlet (7) is provided on the side of the U-shaped air distribution component (5) and close to the first air inlet end, and a second air inlet (8) is provided on the side of the U-shaped air distribution component (5) and close to the first air outlet end; A heat dissipation channel (6), wherein a mounting platform opening (4) is provided on the top outer side of the power distribution cabinet body (1), the heat dissipation channel (6) is fixedly mounted on the inner side of the mounting platform opening (4), and the two ends of the heat dissipation channel (6) are respectively connected to the first air inlet end and the first air outlet end of the U-shaped air distribution component (5), and at least one fan component (11) is mounted on the heat dissipation channel (6); An adjustable air flow passage (12), wherein the adjustable air flow passage (12) is installed at a position of the U-shaped air distribution component (5) close to the second air inlet (8); A cold air diversion component (10), one end of which is connected to the U-shaped air distribution component (5) and is located between the adjustable air flow channel (12) and the first air inlet (7), and the air outlet end of the cold air diversion component (10) is arranged in the power distribution area (a).

2. A high-voltage power distribution cabinet heat dissipation device according to claim 1, characterized in that: The heat dissipation channel (6) comprises: A channel housing (601), wherein the bottoms of both ends of the channel housing (601) are respectively provided with a second air inlet end and a second air outlet end, the second air inlet end is connected to the first air outlet end, and the second air outlet end is connected to the first air inlet end; The channel housing (601) has a first side surface and a second side surface which are arranged in parallel, the first side surface of the channel housing (601) is provided with a plurality of first recesses (602) at equal intervals, the second side surface of the channel housing (601) is provided with a plurality of second recesses (603) at equal intervals, and the first recesses (602) and the second recesses (603) are staggered with each other; The first recess (602) and the second recess (603) are both fixedly connected with a thermoelectric cooling module (604), and the cooling side of the thermoelectric cooling module (604) faces the inner side of the first recess (602) and the inner side of the second recess (603).

3. A high-voltage power distribution cabinet heat dissipation device according to claim 2, characterized in that: The number of the fan components (11) is not greater than the number of the first recesses (602), and the fan components (11) are installed on the second side of the channel housing (601), and the position of the fan components (11) corresponds to the position of the first recesses (602).

4. A high-voltage power distribution cabinet heat dissipation device according to claim 1, characterized in that: A backflow prevention component (9) is fixedly connected to the inner side of the U-shaped air distribution component (5) and located at a position corresponding to the first air inlet (7); the backflow prevention component (9) is in an inverted "L" shape.

5. A high-voltage power distribution cabinet heat dissipation device according to claim 1, characterized in that: The cold air diversion component (10) comprises: An airway tube (1001), wherein a plurality of air outlet interfaces are arranged on the side of the U-shaped air distribution component (5), and a first end of the airway tube (1001) is connected to the air outlet interface of the U-shaped air distribution component (5); A cold air distribution shell (1002), wherein a connection ear (1002a) is fixedly connected to the end of the cold air distribution shell (1002), and the connection ear (1002a) is fixedly mounted to a porous mounting frame (2) by means of bolts, and air holes (1002b) are provided on one side / both sides of the upper and lower sides of the cold air distribution shell (1002), and the second end of the airway pipe (1001) is in communication with the cold air distribution shell (1002); The air outlet interface not connected to the airway tube (1001) is fixedly installed with a blocking plate.

6. A high-voltage power distribution cabinet heat dissipation device according to claim 1, characterized in that: The adjustable air flow channel (12) comprises: A first blocking block (1201), the cross-sectional shape of the U-shaped gas distribution component (5) is rectangular, the inner side of the U-shaped gas distribution component (5) has a third side surface and a fourth side surface which are parallel to each other, the first blocking block (1201) is fixedly mounted on the third side surface of the U-shaped gas distribution component (5), and a first inclined surface which is inclined upward is provided on a side of the first blocking block (1201) away from the third side surface of the U-shaped gas distribution component (5); A second blocking block (1202), a sliding opening (1203) is provided on the fourth side surface of the U-shaped gas distribution component (5), a connecting block (1204) is fixedly connected to the back surface of the second blocking block (1202), a second inclined surface parallel to the first inclined surface is provided on the front surface of the second blocking block (1202), and the connecting block (1204) is located inside the sliding opening (1203) and slides; A cover shell (1205), wherein the cover shell (1205) is slidably connected to the outer side of the U-shaped gas distribution component (5), a rectangular hole is opened on the side of the cover shell (1205), one end of the connecting block (1204) passes through the rectangular hole and is installed with a pressure block (1206) through a rotating shaft, and a torsion spring (1207) is sleeved on the rotating shaft, the first end (1207a) of the torsion spring (1207) is against the inner side of the connecting block (1204), and the second end (1207b) of the torsion spring (1207) is stuck on the outer side of the pressure block (1206).

7. A high-voltage power distribution cabinet heat dissipation device according to claim 6, characterized in that: The cover shell (1205) is a C-shaped structure surrounded on three sides.

8. A high-voltage power distribution cabinet heat dissipation device according to claim 1, characterized in that: A filter-drying component is arranged inside the U-shaped air distribution component (5) or / and inside the cold air diversion component (10), and a silica gel desiccant is arranged on the screen of the filter-drying component.

9. A high-voltage power distribution cabinet heat dissipation device according to claim 1, characterized in that: The power distribution cabinet body (1) is provided with a terminal for supplying power to the thermoelectric cooling module (604) of the heat dissipation channel (6).

10. A high-voltage power distribution cabinet heat dissipation device according to claim 1, characterized in that: An outer cover is hingedly mounted at the top mounting platform (4) of the power distribution cabinet body (1), and the heat dissipation channel (6) is located inside the outer cover.

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