Outdoor ring main unit cabinet and anti-condensation device thereof

Abstract

The present application relates to a kind of outdoor ring network box cabinet and its anti-condensation device.A kind of outdoor ring network box cabinet, including box, the bottom of the box is equipped with base groove, the internal space of the base groove is separated from the internal space of box by partition device, several ring network cabinets are arranged in the box, the cable of single ring network cabinet is arranged through partition device and extends to the internal space of base groove;The sidewall surface of the box is equipped with anti-condensation device, the external air outlet of the anti-condensation device is connected with first air supply pipe, and the external air of anti-condensation device is introduced into the internal space of box or the internal space of base groove by first air supply pipe, to realize the internal temperature and humidity of box and base groove synchronous control.By setting anti-condensation device and partition device, the temperature and humidity balance of the top secondary wiring box in the box, the cable connection cabin in the lower part of ring network cabinet and the bottom base groove of box can be maintained, to avoid ring network cabinet condensation, pollution flashover and other failure problems from source.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to an outdoor ring main unit and its anti-condensation device. Background Technology

[0002] Outdoor ring main units are core outdoor switchgear in power distribution systems. They contain multiple high-voltage switch cabinets (usually ring main units) for power distribution, control, and protection.

[0003] In existing technologies, heating plates and local ventilation fans are often installed at fixed positions on each ring network cabinet within the ring network box to regulate the temperature and humidity of the local space inside the ring network cabinet, thereby reducing the probability of condensation.

[0004] However, the aforementioned localized control methods have significant blind spots, failing to simultaneously address the temperature and humidity balance of the three key areas within the ring main unit: the secondary junction box at the top, the lower cable connection compartment, and the cable trench at the bottom of the outdoor ring main unit. This easily leads to problems such as localized temperature differences causing condensation and moisture accumulation in concealed compartments, making it difficult to prevent common power distribution faults like condensation and flashover in ring main units from the source. Furthermore, traditional temperature and humidity control methods are ill-suited for rainy and humid conditions. Fluctuations in temperature and humidity inside the unit and in the cable trench cause condensation to form on the secondary junction box and cable surfaces. Long-term accumulation of condensation can lead to corrosion of secondary terminals and aging of cable insulation, potentially causing explosions in severe cases. Summary of the Invention

[0005] In response to the shortcomings of the existing production technology, the applicant provides a reasonably structured outdoor ring main unit and its anti-condensation device. By setting up the anti-condensation device and the partition device, the temperature and humidity balance inside the unit, the secondary junction box at the top of the ring main unit, the cable connection compartment at the bottom of the ring main unit, and the base trench at the bottom of the unit can be maintained, thereby avoiding condensation, flashover and other fault problems of the ring main unit from the source.

[0006] The technical solution adopted in this invention is as follows: An outdoor ring network cabinet includes a cabinet body, the bottom of which is provided with a base trench. The internal space of the base trench is separated from the internal space of the cabinet body by a partition device. Several ring network cabinets are installed inside the cabinet body, and the cables of each ring network cabinet pass through the partition device and extend into the base trench. The side wall of the enclosure is equipped with an anti-condensation device. The external air outlet of the anti-condensation device is connected to the first air supply pipe. The anti-condensation device introduces external air into the internal space of the enclosure or the internal space of the base through the first air supply pipe, so as to realize the synchronous control of internal temperature and humidity of the enclosure and the base.

[0007] As a further improvement to the above technical solution: The separating device includes a partition.

[0008] The bottom wall of the partition is coated with a sealing and heat-insulating layer.

[0009] A heat insulation board is provided at intervals below the partition, and the heat insulation board and the partition form a return air space. A return air vent is opened on the end face of the partition.

[0010] The first air supply pipe is connected to a bypass branch pipe, and an air valve is installed inside the first air supply pipe to connect or disconnect the inner cavity of the first air supply pipe from the inner cavity of the bypass branch pipe.

[0011] An exhaust vent is provided on the wall of the trench.

[0012] The upper side wall of the enclosure has at least one air outlet.

[0013] An anti-condensation device includes a housing, which is installed on the aforementioned outdoor ring network cabinet; the housing is assembled with a cover plate, and an installation space is formed between the cover plate and the housing; the housing is placed inside the cabinet, and the cover plate is exposed outside the cabinet. The installation space is equipped with a first fan. The air inlet of the first fan is connected to a first air inlet located at the lower part of the end face of the cover plate. The air outlet of the first fan is connected to a first air outlet located on the bottom wall of the housing via a first air duct. The first air outlet is connected to the first air duct. When the first fan is started, outside air enters the first induced draft pipe through the first air inlet and is then sent out through the first exhaust pipe.

[0014] As a further improvement to the above technical solution: The installation space is also equipped with a second fan. The air inlet of the second fan is connected to a second air inlet located on the upper part of the side wall of the housing. The air outlet of the second fan is connected to a second air outlet located on the bottom wall of the housing through a second air duct.

[0015] An air inlet hood is installed on the outside of the cover plate, and a filter screen is sandwiched between the air inlet hood and the cover plate. Several mesh holes are opened on the surface of the air inlet hood.

[0016] The beneficial effects of this invention are as follows: This invention features a compact and reasonable structure, convenient installation, and stable and reliable operation. By incorporating anti-condensation devices and partitions in synergy, and employing the principles of internal and external breathing ventilation and full-area ventilation circulation, it can efficiently expel humid air from inside the enclosure. It precisely balances the temperature and humidity in four key areas: the interior of the enclosure, the upper secondary wiring compartment of the ring main unit, the lower cable connection compartment, and the bottom foundation trench. This eliminates the conditions for condensation formation at its source, completely preventing condensation and flashover hazards. Simultaneously, it features sealing and insulation, return air guidance, adjustable airflow, and multi-stage filtration, significantly improving the equipment's moisture resistance, corrosion resistance, and insulation performance. This ensures the long-term safe and stable operation of outdoor ring main units, reduces maintenance costs, and extends service life.

[0017] The present invention also has the following advantages: (1) In this invention, by setting up a first sensor, a second sensor, a third sensor and a fourth sensor, the temperature and humidity parameters of the environment are collected by multiple sensors, the operating status of the intelligent anti-condensation device is controlled, and the temperature and humidity inside the outdoor ring network cabinet are controlled to eliminate the condensation problem from the source. At the same time, the control system automatically adjusts the dehumidification power, air supply temperature, air supply volume and air supply mode according to the data collected by the sensors, which can ensure that each area is maintained in the set range of non-condensation, low humidity and stable temperature change for a long time, and realize all-weather intelligent environmental control.

[0018] (2) By setting the guide vane, the air supply direction can be switched precisely as needed and the air volume of each compartment can be allocated to eliminate local high humidity in different areas, maintain the temperature and humidity balance of the whole space efficiently, and avoid the hidden danger of condensation from the source.

[0019] (3) By setting an arc-shaped surface, the local resistance loss of airflow at the outlet of the second air supply pipe can be greatly reduced, avoiding the generation of airflow vortex and turbulence, ensuring uniform and stable airflow velocity, and preventing the problem of sudden drop in local wind pressure and airflow deviation at the pipe outlet.

[0020] (4) In this invention, by setting a heating module, the air in the second air duct can be heated, and hot air is blown out through the second air supply duct in a directional manner to achieve the heating and drying function, reduce the ambient humidity, and avoid condensation.

[0021] (5) By setting up a filter screen, the external air can be filtered to prevent dust and other impurities from being introduced into the outdoor ring network cabinet and thus avoid polluting the environment inside the outdoor ring network cabinet.

[0022] (6) The present invention uses an integrated device, eliminating the need to install a dehumidifier, external condensate drain pipe and electric heating device separately in the ring network cabinet. The structure is simpler, safer and more reliable, and prevents condensation for a long time. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0024] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0025] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 .

[0026] Figure 4 This is a schematic diagram of the anti-condensation device in this invention.

[0027] Figure 5 for Figure 4 Rear view.

[0028] Figure 6 for Figure 4 A bottom view.

[0029] Figure 7 This is a schematic diagram of the internal structure of the anti-condensation device in this invention.

[0030] Figure 8 This is a front view of the anti-condensation device of the present invention after the air inlet cover has been removed.

[0031] Figure 9 This is a schematic diagram of the installation structure of the anti-condensation device and the first and second air supply pipes in this invention.

[0032] Figure 10 This is a schematic diagram of the structure of the second air supply pipe in this invention.

[0033] The components include: 1. enclosure; 2. ring main unit; 3. anti-condensation device; 4. cable; 5. foundation trench; 6. partition device; 7. exhaust vent; 8. air outlet; 9. first air supply duct; 10. second air supply duct; 11. bypass branch duct; 12. air valve; 13. arc-shaped surface. 301. Housing; 302. Cover plate; 303. Air inlet hood; 304. First air inlet; 305. First fan; 306. First air duct; 307. First air outlet; 308. Guide plate; 309. Second air inlet; 310. Second fan; 311. Second air duct; 312. Second air outlet; 313. Heating module; 314. First sensor; 315. Second sensor; 316. Third sensor; 317. Mounting bracket; 601. Partition; 602. Sealing and insulation layer; 603. Insulation board; 604. Return air space; 605. Return air vent. Detailed Implementation

[0034] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0035] like Figures 1-3As shown, this embodiment of an outdoor ring main unit includes a housing 1. A base trench 5 is located at the bottom of the housing 1. The interior space of the base trench 5 is separated from the interior space of the housing 1 by a partition device 6. Several ring main units 2 are installed inside the housing 1. The cables 4 of each ring main unit 2 pass through the partition device 6 and extend into the base trench 5. Anti-condensation devices 3 are installed on the side walls of the housing 1. The external air outlet of the anti-condensation device 3 is connected to a first air supply pipe 9. The anti-condensation device 3 introduces external air into the interior space of the housing 1 or the interior space of the base trench 5 through the first air supply pipe 9, achieving synchronous temperature and humidity control between the housing 1 and the base trench 5. To flexibly and intelligently control the temperature and humidity inside the housing 1, this embodiment of the outdoor ring main unit adds a partition device 6 and an anti-condensation device 3 to the traditional outdoor ring main unit, thereby maintaining the temperature and humidity balance inside the housing 1, the upper secondary compartment of the ring main unit 2, the lower cable connection compartment of the ring main unit 2, and the base trench 5, thus avoiding condensation, flashover, and other faults in the ring main unit from the source.

[0036] The outdoor ring main unit of this embodiment has the following structure: it includes a box body 1, and a base trench 5 is provided at the bottom of the box body 1. The base trench 5 is underground and made of cement, and is used to lay cables 4 and provide foundation protection. The base trench 5 and the interior of the box body 1 are sealed and separated by a partition device 6, forming two relatively independent and controllable sealed spaces, which prevents moisture in the base trench 5 from directly entering the interior of the box body 1. Multiple ring main units 2 are installed inside the box body 1. The interior of a single ring main unit 2 consists of an upper secondary compartment and a lower cable routing compartment from top to bottom, and is equipped with various electrical components. The cables 4 of each ring main unit 2 pass downward through the partition device 6 and extend into the base trench 5 to complete the wiring.

[0037] In addition, at least one air outlet 8 is provided on the upper side wall of the housing 1 so that the air inside the housing 1 can be discharged to the outside of the housing 1.

[0038] like Figures 4-8 As shown, the anti-condensation device 3 of this embodiment includes a housing 301, which is installed on the outdoor ring network cabinet mentioned above. The housing 301 is assembled with a cover plate 302, and an installation space is formed between the cover plate 302 and the housing 301. The housing 301 is placed inside the cabinet 1, and the cover plate 302 is exposed on the outside of the cabinet 1. A first fan 305 is provided in the installation space. The air inlet of the first fan 305 is connected to a first air inlet 304 opened at the lower end face of the cover plate 302. The air outlet of the first fan 305 is connected to a first air outlet 307 opened on the bottom wall of the housing 301 via a first air duct 306. The first air outlet 307 (i.e., the external air outlet of the anti-condensation device 3 mentioned above) is connected to a first air duct 9. When the first fan 305 is started, external air enters the first air duct 306 through the first air inlet 304 and is then sent out through the first air duct 9. The anti-condensation device 3 is installed on the side wall of the housing 1 and has functions of air intake treatment, dehumidification, temperature control, air supply, air return, and intelligent control.

[0039] The anti-condensation device 3 in this embodiment, by setting a first air inlet 304, a first fan 305, a first air duct 306 and a first air outlet 307, can directionally send dry external air into the outdoor ring network cabinet to regulate the temperature and humidity inside the outdoor ring network cabinet.

[0040] In this embodiment, as Figures 6-7 As shown, several guide vanes 308 are installed at the first air outlet 307. Each guide vane 308 is connected to the output end of a servo motor. A single servo motor drives the corresponding guide vane 308 to rotate, thereby adjusting the angle of the guide vane 308 and thus changing the direction of the airflow from the first air outlet 9 and the air volume distributed to each area.

[0041] In addition, such as Figure 7 As shown, a second fan 310 is also provided within the installation space. The air inlet of the second fan 310 is connected to a second air inlet 309 located on the upper side wall of the housing 301, and the air outlet of the second fan 310 is connected to a second air outlet 312 located on the bottom wall of the housing 301 via a second exhaust pipe 311. By setting up the second air inlet 309, the second fan 310, the second exhaust pipe 311, and the second air outlet 312, the air circulation inside the outdoor ring network cabinet can be achieved; for example... Figure 9 As shown, the second air outlet 312 is connected to one end of the second air supply duct 10, as follows: Figure 10 As shown, the other end of the second air supply pipe 10 is formed with an arc-shaped surface 13, and a guide slot is opened on the side wall of the second air supply pipe 10 to realize the directional output of airflow. By setting the arc-shaped surface 13, the local resistance loss of airflow at the outlet of the second air supply pipe 10 can be greatly reduced, avoiding the generation of airflow eddies and turbulence, stabilizing the airflow velocity, and avoiding energy loss caused by sudden drop in pipe outlet air pressure and airflow deviation.

[0042] In this embodiment, as Figures 6-7 As shown, the second air duct 311 integrates a heating module 313, which can heat the circulating air inside the duct. The hot air is then directed out through the second air supply duct 10, increasing the temperature difference between the air inside the box and the equipment surface, moving it away from the dew point range, reducing the relative humidity of the environment, and suppressing condensation.

[0043] An air inlet hood 303 is installed on the outside of the cover plate 302. A filter screen is sandwiched between the air inlet hood 303 and the cover plate 302. Several mesh holes are opened on the surface of the air inlet hood 303. By setting the filter screen, dust and impurities in the outside air can be filtered to prevent dirt from entering the box and contaminating the electrical equipment. The detachable air inlet hood 303 facilitates daily replacement and maintenance of the filter screen.

[0044] The top of the housing 301 is equipped with a first sensor 314, the bottom of the housing 301 is equipped with a second sensor 315, and the lower part of the outer wall of the cover plate 302 is equipped with a third sensor 316. The first sensor 314, the second sensor 315 and the third sensor 316 are all temperature and humidity sensors, which respectively collect temperature and humidity data of the upper part of the housing 1, the lower part of the housing 1 and the external environment. In addition, a mounting bracket 317 is installed inside the housing 301. The bracket 317 is equipped with a PLC controller and a power supply. The PLC controller is electrically connected to the air valve 12, the first sensor 314, the second sensor 315, the third sensor 316, the fourth sensor, the heating module 313, the first fan 305, and the second fan 310. It can automatically control the start and stop of the air valve 12, the heating module 313, the first fan 305, and the second fan 310 according to the temperature and humidity data collected by each sensor, so as to realize fully automatic intelligent control of the environment inside the box.

[0045] The anti-condensation device 3 in this embodiment adopts a dual mode of active air supply and positive pressure isolation. It can continuously supply dry air to maintain a slight positive pressure inside the cabinet and the base tank, preventing high-temperature, humid, and dusty air from seeping in through gaps, thus achieving the function of isolating external intrusion. In addition, it can dehumidify, cool / heat up, and filter the external air to form dry air with a temperature, humidity, and cleanliness that are better than the working conditions inside the cabinet, and then supply it to each key area to achieve the function of introducing high-quality air. Furthermore, it can ensure that the dry air flows from top to bottom and from inside to outside, covering the inside of the cabinet 1, the upper secondary compartment of the ring network cabinet 2, the lower cable connection compartment of the ring network cabinet 2, and the base tank 5, so as to achieve a uniform temperature and humidity throughout the entire area and realize the function of full-area circulation.

[0046] The working process of the anti-condensation device 3 in this embodiment is as follows: When the anti-condensation device 3 in this embodiment performs temperature control, the process is as follows: When the temperature value detected by the first sensor 314 in real time is ≤38℃, the first fan 305 remains shut down; When the temperature value detected in real time by the first sensor 314 is ≥40℃, and / or the temperature value detected in real time by the second sensor 315 is ≥40℃, and the temperature value detected in real time by the third sensor 316 is <40℃, the first fan 305 starts and sends the outside air into the outdoor ring network cabinet for cooling through the mesh of the air inlet hood 303, the filter screen, the first air inlet 304, the first air duct 306, the first air outlet 307 and the first air outlet duct 9 in sequence. When the temperature value detected in real time by the first sensor 314 is less than or equal to the temperature value detected in real time by the third sensor 316, the first fan 305 stops.

[0047] When the anti-condensation device 3 in this embodiment performs temperature difference control, the process is as follows: When the absolute value of the difference between the temperature value detected in real time by the first sensor 314 and the temperature value detected in real time by the second sensor 315 is ≥6℃, the second fan 310 starts, thereby causing the air inside the housing 1 to be blown from bottom to top in sequence through the second air inlet 309, the second air duct 311, the second air outlet 312 and the second air outlet 10, eliminating the temperature difference between the top and bottom of the housing 1; when the absolute value of the difference between the temperature value detected in real time by the first sensor 314 and the temperature value detected in real time by the second sensor 315 is ≤3℃, the second fan 310 stops. In addition, during the start-up process of the first fan 305, when the absolute value of the difference between the temperature value detected in real time by the first sensor 314 and the temperature value detected in real time by the second sensor 315 is ≥6℃, the second fan 310 starts synchronously and starts internal circulation until the absolute value of the difference between the temperature value detected in real time by the first sensor 314 and the temperature value detected in real time by the second sensor 315 is ≤2℃, at which point the second fan 310 stops.

[0048] When the anti-condensation device 3 in this embodiment performs humidity control, the process is as follows: Under the condition of dry external air and displacement dehumidification: When the humidity value detected in real time by the first sensor 314 is greater than 78%, and / or the humidity value detected in real time by the second sensor 315 is greater than 78%, and the humidity value detected in real time by the third sensor 316 is less than the humidity value detected in real time by the first sensor 314 and less than the humidity value detected in real time by the third sensor 316, the first fan 305 starts to introduce outside air into the outdoor ring network cabinet for displacement and dehumidification. When the humidity values ​​detected in real time by the first sensor 314 and the second sensor 315 are both less than or equal to the humidity value detected in real time by the third sensor 316, the first fan 305 stops. Under conditions of high external air humidity and internal hot air circulation dehumidification: When the humidity value detected in real time by the first sensor 314 is ≥80%, and / or the humidity value detected in real time by the second sensor 315 is ≥80%, and the humidity value detected in real time by the third sensor 316 is >80%, the first fan 305 stops, and the second fan 310 and the heating module 313 start synchronously, so that the air inside the housing 1 circulates spirally around the ring network cabinet 2 from bottom to top. During the air flow, the heating module 313 heats the air inside the housing 1 to increase the temperature and reduce the relative humidity. When the humidity value detected in real time by the first sensor 314 is ≤78%, and the humidity value detected in real time by the second sensor 315 is ≤78%, the heating module 313 shuts down.

[0049] In this embodiment, the outdoor ring network cabinet can achieve physical separation between the cabinet body 1 and the base tank 5 by setting a separation device 6 with a sealed partition or sealed cable tray structure, thus blocking direct moisture convection; in conjunction with the anti-condensation device 3, the base tank 5 can be independently controlled for humidity, preventing moisture from rising from the bottom; the cable 4 is sealed at the passage to ensure overall airtightness and improve the temperature control and anti-condensation effect.

[0050] like Figure 3 As shown, in one embodiment of this application, the separating device 6 includes a partition 601. A through hole is formed on the end face of the partition 601. A first air supply pipe 9 passes through the hole, passes through the end face of the partition 601, and extends into the interior of the base tank 5. Foam is filled between the outer surface of the first air supply pipe 9 and the through hole to achieve a seal. An exhaust port 7 is formed on the wall of the base tank 5 to allow air inside the base tank 5 to be discharged to the outside of the base tank 5. A fourth sensor is added inside the base tank 5. The fourth sensor is also a temperature and humidity sensor to collect temperature and humidity data inside the base tank 5. Furthermore, the first air supply pipe 9 leads to the internal environment of the base tank 5, such as... Figure 9 As shown, the first air supply pipe 9 is provided with a bypass branch pipe 11, which leads to the internal environment of the box 1. An air valve 12 is installed inside the first air supply pipe 9. The air valve 12 switches the airflow delivery path and controls the air introduced by the first fan 305 to be blown into the inside of the box 1 through the bypass branch pipe 11, or blown into the inside of the base tank 5 through the first air supply pipe 9. The working process of the outdoor ring network cabinet in this embodiment is as follows: Figure 3 As shown, Figure 3 The green arrows in the image indicate the direction of gas flow. When the absolute value of the difference between the temperature value detected by the fourth sensor in real time and the temperature value detected by the first sensor 314 in real time is ≥4℃, and / or the absolute value of the difference between the temperature value detected by the fourth sensor in real time and the temperature value detected by the second sensor 315 in real time is ≥4℃, and the absolute value of the difference between the humidity value detected by the fourth sensor in real time and the humidity value detected by the first sensor 314 in real time is ≥10%, and / or the absolute value of the difference between the humidity value detected by the fourth sensor in real time and the humidity value detected by the second sensor 315 in real time is ≥10%, based on the temperature and humidity data collected in real time by the third sensor 316, when the controller determines that the temperature and humidity of the external environment can improve and regulate the internal environment of the outdoor ring network cabinet (i.e., including the internal environment of the base 5 and the internal environment of the cabinet 1), the controller controls the first fan 305 to start, and at the same time controls the air valve 12 to switch the airflow delivery path, thereby delivering dry external air to the inside of the cabinet 1 or the inside of the base 5 respectively. When the absolute value of the difference between the temperature value detected by the fourth sensor in real time and the temperature value detected by the first sensor 314 in real time is less than 2℃, and the absolute value of the difference between the temperature value detected by the fourth sensor in real time and the temperature value detected by the second sensor 315 in real time is less than 2℃, and the absolute value of the difference between the humidity value detected by the fourth sensor in real time and the humidity value detected by the first sensor 314 in real time is less than 5%, and the absolute value of the difference between the humidity value detected by the fourth sensor in real time and the humidity value detected by the second sensor 315 in real time is less than 5%, the first fan 305 stops. Meanwhile, when the absolute value of the difference between the temperature value detected in real time by the first sensor 314 and the temperature value detected in real time by the second sensor 315 is ≥6℃, the second fan 310 starts to perform internal circulation until the absolute value of the difference between the temperature value detected in real time by the first sensor 314 and the temperature value detected in real time by the second sensor 315 is ≤2℃, at which point the second fan 310 is turned off.

[0051] like Figure 1 As shown, in one embodiment of this application, the bottom wall of the partition 601 is coated with a sealing and heat-insulating layer 602; at this time, the internal environment of the base trough 5 is completely isolated from the internal environment of the box 1, and the temperature and humidity inside the box 1 cannot affect the temperature and humidity inside the base trough 5. Since the base trough 5 is laid underground, its internal temperature and humidity fluctuate less and can maintain constant temperature and humidity all year round. Therefore, in this embodiment, the first air supply pipe 9 leads to the internal environment of the box 1, and the anti-condensation device 3 only regulates the internal environment of the box 1.

[0052] like Figure 1 As shown, Figure 1 The green arrows in the diagram indicate the direction of gas flow: The temperature and humidity regulation process of the outdoor ring network cabinet in this embodiment is the same as the working process of the aforementioned anti-condensation device 3, and will not be repeated here.

[0053] like Figure 2 As shown, in one embodiment of this application, a heat insulation plate 603 is provided at intervals below the partition plate 601, and the heat insulation plate 603 and the partition plate 601 form a return air space 604. A return air port 605 is opened on the end face of the partition plate 601. At this time, the first air supply pipe 9 extends into the interior of the return air space 604 through the through hole. The outer circular surface of the first air supply pipe 9 and the through hole are filled with foam cotton to seal it. In this embodiment, by setting the heat insulation plate 603, the internal environment of the base tank 5 is completely isolated from the internal environment of the box 1, so as to prevent the moisture in the base tank 5 from spreading upward. like Figure 2 As shown, Figure 2The green arrows in the diagram indicate the direction of gas flow. The temperature and humidity regulation process of the outdoor ring network cabinet in this embodiment is basically the same as the working process of the aforementioned anti-condensation device 3. The only difference is that the airflow blown out by the first air supply pipe 9 must first pass through the return air space 604 and the return air port 605 before returning to the interior of the cabinet 1 to form a full-area return air circulation.

[0054] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. An outdoor ring network cabinet, characterized in that: Includes a box body (1), the bottom of the box body (1) is provided with a base trench (5), the internal space of the base trench (5) is separated from the internal space of the box body (1) by a partition device (6), and several ring network cabinets (2) are installed inside the box body (1). The cable (4) of a single ring network cabinet (2) passes through the partition device (6) and extends into the base trench (5). The side wall of the box (1) is equipped with an anti-condensation device (3). The external air outlet of the anti-condensation device (3) is connected to the first air supply pipe (9). The anti-condensation device (3) introduces external air into the internal space of the box (1) or the internal space of the base (5) through the first air supply pipe (9), so as to realize the synchronous control of internal temperature and humidity of the box (1) and the base (5).

2. The outdoor ring network cabinet as described in claim 1, characterized in that: The separating device (6) includes a partition (601).

3. An outdoor ring network cabinet as described in claim 2, characterized in that: The bottom wall of the partition (601) is coated with a sealing and heat-insulating layer (602).

4. An outdoor ring network cabinet as described in claim 2, characterized in that: A heat insulation plate (603) is provided at intervals below the partition (601), and the heat insulation plate (603) and the partition (601) form a return air space (604). A return air vent (605) is provided on the end face of the partition (601).

5. An outdoor ring network cabinet as described in claim 1, characterized in that: The first air supply pipe (9) is connected to a bypass branch pipe (11). An air valve (12) is installed inside the first air supply pipe (9). The air valve (12) enables the connection or isolation between the inner cavity of the first air supply pipe (9) and the inner cavity of the bypass branch pipe (11).

6. An outdoor ring network cabinet as described in claim 1, characterized in that: An exhaust vent (7) is provided on the wall of the foundation trench (5).

7. An outdoor ring network cabinet as described in claim 1, characterized in that: The upper side wall of the box (1) has at least one air outlet (8).

8. An anti-condensation device, characterized in that: Includes a housing (301), which is installed on an outdoor ring network cabinet as described in any one of claims 1-7; the housing (301) is assembled with a cover plate (302), and an installation space is formed between the cover plate (302) and the housing (301); the housing (301) is placed inside the cabinet (1), and the cover plate (302) is exposed outside the cabinet (1); The installation space is provided with a first fan (305). The air inlet of the first fan (305) is connected to the first air inlet (304) opened at the lower part of the end face of the cover plate (302). The air outlet of the first fan (305) is connected to the first air outlet (307) opened at the bottom wall of the shell (301) via the first air duct (306). The first air outlet (307) is connected to the first air duct (9). When the first fan (305) is started, outside air enters the first induced draft pipe (306) through the first air inlet (304) and is then sent out through the first air delivery pipe (9).

9. The anti-condensation device as described in claim 8, characterized in that: The installation space is also provided with a second fan (310). The air inlet of the second fan (310) is connected to the second air inlet (309) opened on the upper side wall of the housing (301). The air outlet of the second fan (310) is connected to the second air outlet (312) opened on the bottom wall of the housing (301) through the second air duct (311).

10. The anti-condensation device as described in claim 8, characterized in that: An air inlet hood (303) is installed on the outside of the cover plate (302). A filter screen is sandwiched between the air inlet hood (303) and the cover plate (302). Several mesh holes are opened on the surface of the air inlet hood (303).

Images