Intelligent power internet of things power distribution cabinet

Abstract

The invention provides an intelligent power internet-of-things power distribution cabinet, and relates to the technical field of power distribution cabinets, the intelligent power internet-of-things power distribution cabinet comprises a cabinet body and an adjusting assembly installed in the cabinet body, a moving plate is movably arranged on the surface of the adjusting assembly, a fixing assembly is arranged in the cabinet body, and a filter plate is fixedly installed on the upper surface of the cabinet body through the fixing assembly. A mounting plate used for mounting electrical equipment is movably clamped to the side face of the movable plate and moves on the side face of the adjusting assembly through the movable plate. The electrical equipment is fixed on the mounting plate outside the power distribution cabinet through the fixing bolts, then the limiting plate is rotated to enable the mounting plate to be clamped on the side surface of the moving plate, and then the limiting plate is rotated again to fix the mounting plate, so that the mounting plate on which the electrical equipment is fixed is fixed on the side surface of the moving plate in the power distribution cabinet; complex operations of manual adjustment and alignment in a narrow space are reduced, the labor intensity of operators is reduced, and the risk of misoperation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution cabinets, and in particular to an intelligent power Internet of Things power distribution cabinet. Background Art

[0002] The Smart Power Internet of Things (SIoT) refers to a system that leverages IoT technology to achieve intelligent management and optimized operation of power systems. It combines traditional power systems with advanced sensor, communication, and data analysis technologies to enable real-time monitoring, control, and optimization of the power grid. To monitor key parameters such as current, voltage, and power in real time, a Smart Power Internet of Things (SIoT) distribution cabinet is required. In traditional SIoT distribution cabinets, power is distributed to different branch circuits or loads based on demand. These cabinets typically contain multiple circuit breakers or fuses to control the on / off of each branch circuit.

[0003] When installing devices such as circuit breakers, sensors, and control components, they must be mounted inside the distribution cabinet using brackets, which are attached to the crossbars using bolts. This requires one hand to position the components and the other to tighten them with a screwdriver, making installation inconvenient. Furthermore, during operation, the internal devices are susceptible to the effects of ambient humidity, causing moisture condensation on the device surfaces. This can accelerate mold growth, reduce electrical insulation strength, accelerate metal corrosion, lead to contact surface oxidation, and increase contact resistance, posing a safety threat to the equipment inside the distribution cabinet. Therefore, we propose a smart power IoT distribution cabinet to address these issues. Summary of the Invention

[0004] The purpose of the present invention is to make up for the shortcomings of the existing technology and propose an intelligent power Internet of Things distribution cabinet, which solves the problems of inconvenient installation and poor moisture-proof and dehumidification functions, which will cause accelerated mold growth, reduced electrical insulation strength, accelerated metal corrosion, leading to contact surface oxidation, and increased contact resistance, posing a threat to the safety of equipment inside the distribution cabinet.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a smart power Internet of Things distribution cabinet, comprising a cabinet body and an adjustment assembly installed inside the cabinet body, wherein a movable plate is movably provided on the surface of the adjustment assembly, a fixed assembly is provided inside the cabinet body, a filter plate is fixedly installed on the upper surface of the cabinet body via the fixed assembly, a mounting plate for mounting electrical equipment is movably connected to the side of the movable plate, and the mounting plate is movable on the side of the adjustment assembly via the movable plate;

[0006] The adjustment assembly includes a fixed plate fixed to the inner wall of the cabinet, a movable compartment is opened inside the fixed plate, a first telescopic rod is fixed to the inner wall of the movable compartment, a movable plate is fixed to the upper end of the first telescopic rod, and a clamping block is fixed to the upper surface of the movable plate.

[0007] Furthermore, a pressure rod is fixed to the upper surface of the movable plate, and the upper ends of the pressure rod and the blocking block pass through the movable warehouse. A magnet is fixed to the lower surface of the movable plate, and a second telescopic rod is fixed to the side wall of the movable warehouse. A shift rod is fixed to the side of the second telescopic rod. A movable groove is provided on the surface of the movable warehouse, and the shift rod is inserted into the movable groove. The end faces of the movable plate and the shift rod are both provided with inclined surfaces.

[0008] Furthermore, there are two groups of movable plates, pressure rods and magnets, which are symmetrically arranged inside the movable warehouse. The two magnets can adsorb each other. The surface of the first telescopic rod is sleeved with a first spring, and the surface of the second telescopic rod is sleeved with a second spring.

[0009] Furthermore, the upper surface of the movable plate is rotatably connected to the limiting plate, the lower surface of the limiting plate is provided with a placement groove, the inner wall of the placement groove is fixed with a third telescopic rod, the lower end of the third telescopic rod is fixed with a fixed block, the upper surface of the limiting plate is provided with a fixing groove corresponding to the fixed block, the fixed block can be clamped inside the fixing groove, the side of the fixed block is provided with an inclined surface, the surface of the limiting plate is provided with a slot corresponding to the clamping block, and the clamping block is clamped inside the slot.

[0010] Furthermore, the fixing assembly includes a knob arranged above the cabinet, a first bevel gear is fixed on the lower surface of the knob, a transmission compartment is opened inside the cabinet, the first bevel gear is arranged inside the transmission compartment, a threaded rod is fixed on the inner wall of the transmission compartment, a second bevel gear is fixed on the surface of the threaded rod, the first bevel gear is meshed with the second bevel gear, a threaded tube is threadedly connected to the surface of the threaded rod, a limiting rod is fixed on the end face of the threaded tube, a placement plate is also fixed on the lower surface of the filter plate, a limiting rod corresponding to the limiting rod is opened on the side of the placement plate, and the threaded tube drives the limiting rod to be clamped inside the limiting groove.

[0011] Furthermore, a slider is fixed on the side of the threaded tube, and a slider corresponding to the slide groove is opened on the inner wall of the transmission chamber. The slider moves inside the slide groove, and the threaded tube moves inside the transmission chamber through the slider and the slide groove. There are two sliders and two slide grooves, and they are symmetrically arranged on both sides of the threaded tube.

[0012] Furthermore, a wire management box is fixed to the inner wall of the cabinet, and the wire management box is arranged above the fixed plate. A shielding plate is fixed to the upper surface of the cabinet, and a fan is fixed to the lower surface of the shielding plate. A plurality of heat dissipation ports are also opened on the side of the cabinet.

[0013] Compared with the existing technology, the intelligent power Internet of Things distribution cabinet has the following beneficial effects:

[0014] 1. The present invention first fixes the electrical equipment on the mounting plate outside the distribution cabinet by fixing bolts, then rotates the limit plate so that the mounting plate can be clamped on the side of the movable plate, and then rotates the limit plate again to fix the mounting plate, thereby fixing the mounting plate with the electrical equipment fixed to the side of the movable plate inside the distribution cabinet, reducing the complicated operations of manual adjustment and alignment in a small space, alleviating the labor intensity of the operator, reducing the risk of misoperation, and rotating the limit plate to lock, ensuring that the mounting plate and the movable plate are tightly combined and firmly fixed, reducing the risk of the equipment loosening or falling off.

[0015] 2. The present invention presses the pressure plate to move the movable plate and the block fixed on the upper surface of the movable plate toward the inside of the movable warehouse, so that the block is disengaged from the slot on the side of the movable plate, and then the position of the movable plate can be adjusted. At the same time, the magnets fixed on the side of the movable plate can adsorb each other to prevent the movable plate from rebounding under the reaction force of the first spring, thereby facilitating the operator to adjust the position of the electrical equipment with one hand, ensuring the accuracy of installation and meeting different installation needs and fine-tuning requirements. After the adjustment is completed, it is only necessary to pull the lever so that the lever can separate the two movable plates adsorbed together, so that the movable plate can drive the block fixed on its surface to be re-engaged in the slot under the rebound force of the first spring, thereby completing the fixation of the movable plate.

[0016] 3. The present invention uses a fan to blow external air from the filter plate into the interior of the cabinet, thereby accelerating the air circulation inside the cabinet and discharging the hot air inside the cabinet through the heat dissipation port. At the same time, a bamboo charcoal bag or a lime powder bag is placed on the surface of the placement plate, which can absorb water vapor in the air, reduce the impact of humidity and water vapor on the equipment surface and contact surface, slow down metal corrosion and oxidation, and maintain insulation performance and good contact. At the same time, the fixing assembly also makes it convenient for the staff to remove the filter plate and the placement plate fixed on the lower surface of the filter plate, and convenient for the staff to clean the filter plate and replace the bamboo charcoal bag or lime powder bag on the surface of the placement plate, thereby avoiding a reduction in filtering effect and drying effect, and further improving the safety of electrical equipment inside the cabinet.

[0017] Other advantages, objects and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2It is a front cross-sectional structural schematic diagram of the present invention;

[0020] Figure 3 It is a partial cross-sectional structural schematic diagram of the adjustment component in the present invention;

[0021] Figure 4 It is a partial cross-sectional structural schematic diagram of the movable plate in the present invention;

[0022] Figure 5 For the present invention Figure 2 A schematic diagram of the structure enlarged in the middle;

[0023] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the filter plate in the present invention.

[0025] In the picture:

[0026] 1. Cabinet; 101. Transmission compartment; 102. Shielding plate; 103. Fan; 104. Heat dissipation vent; 2. Adjustment assembly; 201. Fixed plate; 202. Movable compartment; 203. First telescopic rod; 204. Movable plate; 205. Clamping block; 206. Press rod; 207. Second telescopic rod; 208. Push rod; 209. Movable slot; 210. Magnet; 3. Movable plate; 301. Limiting plate; 302. Placement slot; 303. Third telescopic rod; 304. Fixed block; 305. Fixed slot; 306. Clamping slot; 4. Filter plate; 401. Placement plate; 402. Limiting slot; 5. Fixing assembly; 501. Knob; 502. First bevel gear; 503. Threaded rod; 504. Second bevel gear; 505. Threaded tube; 506. Slider; 6. Mounting plate; 7. Wire management box. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1 to 7The present invention provides the following implementation scheme: an intelligent power Internet of Things distribution cabinet, comprising a cabinet 1 and an adjustment component 2 installed inside the cabinet 1, a movable plate 3 is movably provided on the surface of the adjustment component 2, a fixed component 5 is provided inside the cabinet 1, a filter plate 4 is fixedly installed on the upper surface of the cabinet 1 through the fixed component 5, a mounting plate 6 for mounting electrical equipment is movably connected to the side of the movable plate 3, and the mounting plate 6 is movable on the side of the adjustment component 2 through the movable plate 3; a wire management box 7 is also fixed on the inner wall of the cabinet 1, and the wire management box 7 is arranged above the fixed plate 201, and the upper surface of the cabinet 1 is fixed A shielding plate 102 is fixed, and a fan 103 is fixed on the lower surface of the shielding plate 102. A plurality of heat dissipation vents 104 are also opened on the side of the cabinet 1. The present invention uses the fan 103 to blow external air from the filter plate 4 into the interior of the cabinet 1, thereby accelerating the air circulation inside the cabinet 1 and discharging the hot air inside the cabinet 1 through the heat dissipation vents 104. At the same time, bamboo charcoal bags or lime powder bags are placed on the surface of the placement plate 401 to absorb water vapor in the air, reduce the impact of humidity and water vapor on the surface and contact surface of the equipment, slow down metal corrosion and oxidation, and maintain insulation performance and good contact.

[0029] Please refer to Figure 1 、 Figure 2 and Figure 3The adjustment component 2 includes a fixed plate 201 fixed to the inner wall of the cabinet 1, a movable compartment 202 is opened inside the fixed plate 201, a first telescopic rod 203 is fixed to the inner wall of the movable compartment 202, a movable plate 204 is fixed to the upper end of the first telescopic rod 203, and a clamping block 205 is fixed to the upper surface of the movable plate 204; a pressure rod 206 is also fixed to the upper surface of the movable plate 204, and the upper ends of the pressure rod 206 and the clamping block 205 both pass through the movable compartment 202, and a magnet 2 is fixed to the lower surface of the movable plate 204. 10. The side wall of the movable chamber 202 is also fixed with a second telescopic rod 207, and a lever 208 is fixed to the side of the second telescopic rod 207. A movable groove 209 is provided on the surface of the movable chamber 202, and the lever 208 is inserted into the movable groove 209. The end faces of the movable plate 204 and the lever 208 are both provided with inclined surfaces; the movable plate 204, the pressure rod 206 and the magnet 210 are each provided with two groups, and are symmetrically arranged inside the movable chamber 202. The two magnets 210 can attract each other, and the first telescopic rod The first spring is sleeved on the surface of 203, and the second spring is sleeved on the surface of the second telescopic rod 207; the present invention presses the pressure plate to make the movable plate 204 and the block 205 fixed on the upper surface of the movable plate 204 move toward the inside of the movable chamber 202, so that the block 205 is disengaged from the slot 306 on the side of the movable plate 3, and then the position of the movable plate 3 can be adjusted. At the same time, the magnets 210 fixed on the side of the movable plate 204 can be attracted to each other to prevent the movable plate 204 from rebounding under the reaction force of the first spring, thereby facilitating the operator to adjust the position of the electrical equipment with one hand, ensuring the accuracy of installation and meeting different installation requirements and fine-tuning requirements. After the adjustment is completed, it is only necessary to pull the lever 208 so that the lever 208 can separate the two movable plates 204 that are attracted together, so that the movable plate 204 can drive the block 205 fixed on its surface to be re-engaged in the slot 306 under the rebound force of the first spring, completing the fixing of the movable plate 3.

[0030] Please refer to Figure 2 、 Figure 4 and Figure 6The upper surface of the movable plate 3 is rotatably connected to the limiting plate 301, and the lower surface of the limiting plate 301 is provided with a placement groove 302, and the inner wall of the placement groove 302 is fixed with a third telescopic rod 303, and the lower end of the third telescopic rod 303 is fixed with a fixing block 304. The upper surface of the limiting plate 301 is provided with a fixing groove 305 corresponding to the fixing block 304, and the fixing block 304 can be clamped inside the fixing groove 305, and the side of the fixing block 304 is provided with an inclined surface, and the surface of the limiting plate 301 is provided with a clamping groove 306 corresponding to the clamping block 205, and the clamping block 205 is clamped inside the clamping groove 306; the present invention first fixes the electrical equipment on the mounting plate 6 outside the distribution cabinet by fixing bolts, and then rotates the limiting plate 301 so that the mounting plate 6 can be clamped on the side of the movable plate 3, and then rotates the limiting plate 301 again 01 fixes the mounting plate 6, thereby fixing the mounting plate 6 with the electrical equipment fixed on the side of the movable plate 3 inside the distribution cabinet, reducing the complicated operation of manual adjustment and alignment in a small space, reducing the labor intensity of the operator, and reducing the risk of misoperation, and rotating the limit plate 301 to lock, ensuring that the mounting plate 6 and the movable plate 3 are tightly combined and firmly fixed, reducing the risk of equipment loosening or falling off; the present invention also facilitates the staff to remove the filter plate 4 and the placement plate 401 fixed on the lower surface of the filter plate 4 through the fixing component 5, and facilitates the staff to clean the filter plate 4, and replace the bamboo charcoal bag or lime powder bag on the surface of the placement plate 401, thereby avoiding the reduction of the filtering effect and drying effect, and further improving the safety of the electrical equipment inside the cabinet 1.

[0031] Please refer to Figure 2 、 Figure 5 and Figure 6 The fixing assembly 5 includes a knob 501 arranged above the cabinet 1, a first bevel gear 502 is fixed to the lower surface of the knob 501, a transmission compartment 101 is opened inside the cabinet 1, the first bevel gear 502 is arranged inside the transmission compartment 101, a threaded rod 503 is fixed to the inner wall of the transmission compartment 101, a second bevel gear 504 is fixed to the surface of the threaded rod 503, the first bevel gear 502 is meshed with the second bevel gear 504, a threaded tube 505 is threadedly connected to the surface of the threaded rod 503, and a limit rod is fixed to the end face of the threaded tube 505. A placement plate 401 is also fixed to the lower surface of the filter plate 4, and a limiting rod corresponding to the limiting rod is opened on the side of the placement plate 401, and the threaded tube 505 drives the limiting rod to be clamped inside the limiting groove 402; a slider 506 is fixed to the side of the threaded tube 505, and a slider 506 corresponding to the slide groove is opened on the inner wall of the transmission chamber 101, and the slider 506 moves inside the slide groove. The threaded tube 505 moves inside the transmission chamber 101 through the slider 506 and the slide groove. There are two sliders 506 and two slide grooves, and they are symmetrically arranged on both sides of the threaded tube 505.

[0032] Working principle: First, place the device at the designated position and connect the device to the external control equipment and 220V AC power. The control equipment can be a conventional known device that controls a computer, etc. Then the staff fixes the electrical equipment on the mounting plate 6 outside the distribution cabinet through fixing bolts. Then the staff rotates the limit plate 301. Since the surface of the fixing block 304 is provided with an inclined surface, the fixing block 304 can be disengaged from the limit groove 402 during the rotation of the limit plate 301. After the staff clamps the mounting plate 6 to the side of the movable plate 3, they rotate the limit plate 301 again to re-clamp the fixing block 304 in the fixing groove 305, thereby fixing the mounting plate 6, and then fixing the mounting plate 6 with the electrical equipment to the side of the movable plate 3 inside the distribution cabinet, reducing the complicated operation of manual adjustment and alignment in a small space, and rotating the limit plate 301 to lock it, ensuring that the mounting plate 6 and the movable plate 3 are tightly combined and firmly fixed, reducing the risk of the equipment loosening or falling off.

[0033] When the staff needs to adjust the position of the electrical equipment, the staff only needs to press the pressure plate first to move the movable plate 204 and the block 205 fixed on the upper surface of the movable plate 204 toward the inside of the movable compartment 202, so that the block 205 is disengaged from the slot 306 on the side of the movable plate 3, and then the position of the movable plate 3 can be adjusted. At the same time, the magnets 210 fixed on the side of the movable plate 204 can be attracted to each other, preventing the movable plate 204 from rebounding under the reaction force of the first spring, thereby making it convenient for the operator to adjust the position of the electrical equipment with one hand. After the adjustment is completed, it is only necessary to pull the lever 208 so that the lever 208 can separate the two movable plates 204 that are attracted together, so that the movable plate 204 can drive the block 205 fixed on its surface to be re-engaged in the slot 306 under the rebound force of the first spring, thereby completing the fixation of the movable plate 3.

[0034] Finally, when it is necessary to clean the filter plate 4 or replace the bamboo charcoal bag or lime powder bag placed on the placement plate 401, the staff only needs to turn the knob 501 to drive the first bevel gear 502 to rotate, and the first bevel gear 502 drives the second bevel gear 504 meshing with it to rotate, and the second bevel gear 504 drives the threaded rod 503 to rotate, and the threaded rod 503 drives the threaded tube 505 to move the rod, thereby driving the limiting rod fixed on the end face of the threaded tube 505 to move, so that the limiting rod is disengaged from the fixing groove 305 on the side of the placement plate 401, and then the staff can remove the filter plate 4 from the upper surface of the cabinet 1 for cleaning, and replace the bamboo charcoal bag on the surface of the placement plate 401 from the side.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A smart power Internet of Things distribution cabinet, characterized by: The invention comprises a cabinet (1) and an adjustment assembly (2) installed inside the cabinet (1); a movable plate (3) is movably provided on the surface of the adjustment assembly (2); a fixing assembly (5) is provided inside the cabinet (1); a filter plate (4) is fixedly installed on the upper surface of the cabinet (1) via the fixing assembly (5); a mounting plate (6) for mounting electrical equipment is movably connected to the side of the movable plate (3); and the mounting plate (6) is movably mounted on the side of the adjustment assembly (2) via the movable plate (3); The adjustment assembly (2) comprises a fixed plate (201) fixed to the inner wall of the cabinet (1); a movable compartment (202) is provided inside the fixed plate (201); a first telescopic rod (203) is fixed to the inner wall of the movable compartment (202); a movable plate (204) is fixed to the upper end of the first telescopic rod (203); and a clamping block (205) is fixed to the upper surface of the movable plate (204).

2. The intelligent power Internet of Things distribution cabinet according to claim 1, characterized in that: A pressure rod (206) is also fixed on the upper surface of the movable plate (204), and the upper ends of the pressure rod (206) and the clamping block (205) both pass through the movable bin (202). A magnet (210) is fixed on the lower surface of the movable plate (204). A second telescopic rod (207) is also fixed on the side wall of the movable bin (202), and a shifting rod (208) is fixed on the side of the second telescopic rod (207). A movable groove (209) is provided on the surface of the movable bin (202), and the shifting rod (208) is inserted into the movable groove (209). The end surfaces of the movable plate (204) and the shifting rod (208) are both provided with inclined surfaces.

3. The intelligent power Internet of Things distribution cabinet according to claim 2, characterized in that: The movable plate (204), the pressure rod (206) and the magnet (210) are each provided in two groups and are symmetrically arranged inside the movable compartment (202). The two magnets (210) can be attracted to each other. The surface of the first telescopic rod (203) is sleeved with a first spring, and the surface of the second telescopic rod (207) is sleeved with a second spring.

4. The intelligent power Internet of Things distribution cabinet according to claim 1, characterized in that: The upper surface of the movable plate (3) is rotatably connected to the limiting plate (301); the lower surface of the limiting plate (301) is provided with a placement groove (302); the inner wall of the placement groove (302) is fixed with a third telescopic rod (303); the lower end of the third telescopic rod (303) is fixed with a fixed block (304); the upper surface of the limiting plate (301) is provided with a fixing groove (305) corresponding to the fixing block (304); the fixing block (304) can be clamped inside the fixing groove (305); the side surface of the fixing block (304) is provided with an inclined surface; the surface of the limiting plate (301) is provided with a clamping groove (306) corresponding to the clamping block (205); the clamping block (205) is clamped inside the clamping groove (306).

5. The intelligent power Internet of Things distribution cabinet according to claim 1, characterized in that: The fixing assembly (5) comprises a knob (501) arranged above the cabinet (1); a first bevel gear (502) is fixed to the lower surface of the knob (501); a transmission compartment (101) is provided inside the cabinet (1); the first bevel gear (502) is provided inside the transmission compartment (101); a threaded rod (503) is fixed to the inner wall of the transmission compartment (101); a second bevel gear (504) is fixed to the surface of the threaded rod (503); the first bevel gear (502) and the second bevel gear (504) are meshed; a threaded tube (505) is threadedly connected to the surface of the threaded rod (503); a limiting rod is fixed to the end face of the threaded tube (505); a placement plate (401) is also fixed to the lower surface of the filter plate (4); a limiting rod corresponding to the limiting rod is provided on the side of the placement plate (401); the threaded tube (505) drives the limiting rod to be clamped in the limiting groove (402).

6. The intelligent power Internet of Things distribution cabinet according to claim 5, characterized in that: A slider (506) is fixed to the side of the threaded tube (505), and a slider (506) corresponding to the slide groove is opened on the inner wall of the transmission chamber (101). The slider (506) moves inside the slide groove. The threaded tube (505) moves inside the transmission chamber (101) through the slider (506) and the slide groove. There are two sliders (506) and two slide grooves, and they are symmetrically arranged on both sides of the threaded tube (505).

7. The intelligent power Internet of Things distribution cabinet according to claim 1, characterized in that: A wire management box (7) is also fixed to the inner wall of the cabinet (1), and the wire management box (7) is arranged above the fixing plate (201). A shielding plate (102) is fixed to the upper surface of the cabinet (1), and a fan (103) is fixed to the lower surface of the shielding plate (102). A plurality of heat dissipation openings (104) are also provided on the side of the cabinet (1).

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