Energy-saving heat dissipation ring network cabinet

Abstract

The application relates to an energy-saving heat dissipation ring network cabinet, which comprises a ring network cabinet body, an air inlet, an air outlet, a negative pressure exhaust fan and a buried water tank buried 1.5m below the ground, wherein the buried water tank is filled with cooling medium; the air outlet of the negative pressure exhaust fan is communicated with the air inlet, the air inlet is connected with an air inlet pipeline, one end of the air inlet pipeline is extended to the ground after penetrating through the cooling medium in the buried water tank; the air inlet pipeline comprises a main air pipe and a plurality of branch air pipes which are used for connecting adjacent pipe walls of the main air pipe and are arranged in the buried water tank in a coiled mode, and the main air pipe and the branch air pipes are both made of heat-conducting metal materials; a plurality of breaks are arranged on the main air pipe at intervals, and flexible variable-diameter pipes are sealingly connected at the breaks; the negative pressure exhaust fan is connected with a pulse controller, and the pulse controller is configured to control the negative pressure exhaust fan to start and stop and / or increase and decrease the rotating speed at a set frequency. The application can reduce the temperature of the ambient air delivered into the air inlet without additional refrigeration equipment, thereby improving the heat dissipation effect on the ring network cabinet body.

Description

Technical Field

[0001] This application relates to the technical field of ring main units, and in particular to an energy-saving heat dissipation ring main unit. Background Technology

[0002] A ring main unit (RMU) is an electrical device consisting of a group of power transmission and distribution equipment (high-voltage switchgear) housed in a metal or non-metal insulated cabinet or assembled into a modular ring network power supply unit. Its core components utilize load switches and fuses. It offers advantages such as simple structure, small size, low cost, improved power supply parameters and performance, and enhanced power supply safety. It is widely used in substations and prefabricated substations in load centers such as urban residential areas, high-rise buildings, large public buildings, and factories.

[0003] In existing ring main units, cooling fans are usually used for heat dissipation. In order to save energy, temperature sensors are usually installed in conjunction with cooling fans. When the internal temperature of the ring main unit exceeds the threshold, the temperature sensor reports the temperature, and the control system sends a command to start the cooling fan, and then performs heat dissipation, thereby achieving automatic heat dissipation.

[0004] Chinese patent application CN202411071861.9, in the related technology, proposes a gas-insulated ring main unit and its heat dissipation method. The heat dissipation structure includes a heat dissipation component, which includes a heat-conducting plate and a heat insulation cover. The heat insulation cover has an air intake pipe inside, an air inlet pipe at the top of the air intake pipe, a U-shaped cylinder at the bottom of the air intake pipe, an exhaust pipe at one end of the U-shaped cylinder, and a fan installed on the exhaust pipe. It also includes a heat insulation component, which includes a water storage tank. The water storage tank has an outlet pipe and a return pipe at both ends, and a water pump and a first valve at the bottom of the outlet pipe and the return pipe, respectively. The top of the outlet pipe and the return pipe has a bend. This invention uses a fan to generate suction in the air inlet pipe, allowing external gas to enter the top of the cabinet through the air inlet. As the gas is transported to the exhaust end through the suction pipe, the suction head carries the high-temperature gas in the heat insulation cover outward, enabling the gas-insulated ring main unit to dissipate heat and cool down through specific inlets and outlets. Furthermore, by starting a water pump, low-temperature water from the water storage tank is continuously supplied to the bend pipe through the outlet pipe, using the cooling effect of the low-temperature water on the top of the cabinet to achieve the effect of blocking the high temperature on the top of the cabinet.

[0005] The aforementioned technologies have the following drawbacks: when cooling the ring main unit with circulating water, there is a risk of leakage at the joints of the circulating water network after prolonged use; moreover, when there is a large temperature difference between day and night, water droplets will condense on the outer wall of the circulating water network, which is not conducive to maintaining a dry environment for the ring main unit and will instead increase the dehumidification burden on the ring main unit; in addition, the fans and water pumps will also generate a certain amount of heat when they work for a long time, and the energy consumption is difficult to reduce, which is not conducive to achieving energy saving of the ring main unit. Summary of the Invention

[0006] In order to improve the problem of leakage and condensation risks that increase the dehumidification burden of ring main units in the use of circulating cooling water for cooling in the prior art, this application provides an energy-saving heat dissipation ring main unit.

[0007] The energy-saving heat dissipation ring main unit provided in this application adopts the following technical solution:

[0008] An energy-saving heat dissipation ring main unit includes a ring main unit body and an air inlet and an air outlet provided on the ring main unit body. An underground water tank is installed 1.5m below the ring main unit body and is filled with a cooling medium. A negative pressure exhaust fan is also installed on the ring main unit body. The air outlet of the negative pressure exhaust fan is connected to the air inlet, and the air inlet is connected to an air inlet pipe. One end of the air inlet pipe passes through the cooling medium in the underground water tank, extends out of the ground, and extends to one side of the ring main unit body.

[0009] The air intake duct includes a main air duct coiled in the underground water tank and multiple branch air ducts for connecting adjacent pipe walls of the main air duct. Both the main air duct and the branch air ducts are made of thermally conductive metal material.

[0010] The main air duct has multiple breaks spaced apart, and flexible reducing pipes are sealed and connected at the breaks. The negative pressure exhaust fan is connected to a pulse controller. The pulse controller is configured to control the negative pressure exhaust fan to start and stop at a set frequency and / or increase or decrease the speed, so that the multiple flexible reducing pipes change diameter when the negative pressure exhaust fan starts and stops, thereby promoting airflow turbulence in the main air duct and disturbance of the cooling medium in the buried water tank.

[0011] Furthermore, the main duct is fixed at the break point with a bracket for connecting the two ends of the duct. The inner diameter of the bracket along the radial direction of the main duct is larger than the outer diameter of the flexible variable diameter pipe when it is expanded.

[0012] Furthermore, the main air duct located in the underground water tank is U-shaped and includes two vertical sections and one horizontal section. Flexible reducing pipes are distributed on both the vertical and horizontal sections, and the branch air ducts are used to connect the two vertical sections.

[0013] Furthermore, the diameter of the branch duct is smaller than that of the main duct, and multiple branch ducts are distributed in a network between the two vertical sections, and the two intersecting branch ducts are not connected at the intersection.

[0014] Furthermore, a smooth transition surface is provided at the corner where the branch duct connects to the main duct.

[0015] Furthermore, the fixing frame is provided with several baffles that are spaced apart from the flexible variable diameter pipe.

[0016] Furthermore, a condenser tank is connected between the main air duct and the negative pressure exhaust fan. Multiple conical condenser plates are fixedly connected in the condenser tank and are arranged sequentially from bottom to top. Adjacent condenser plates are spaced apart, and the diameter of the cone bottom opening and the diameter of the cone top opening of the multiple condenser plates from bottom to top both show an increasing trend.

[0017] The bottom of the condenser is provided with an annular water storage tank that protrudes downwards. The bottom wall of the annular water storage tank is provided with several weak spring check valves that only allow fluid to flow out of the condenser.

[0018] Furthermore, the condenser plate is provided with multiple water guide grooves arranged along its conical surface.

[0019] Furthermore, the outer wall of the buried water tank is fixed with multiple heat-conducting fins.

[0020] Furthermore, one end of the air inlet duct extending to one side of the ring main unit is connected to a rainproof air inlet component, and the air inlet end of the rainproof air inlet component is equipped with a dustproof component.

[0021] In summary, the beneficial technical effects of this application are as follows:

[0022] 1. By burying an underground water tank filled with cooling medium, the cooling medium in the underground water tank exchanges heat with the surrounding soil to achieve natural cooling of the cooling medium, which is especially suitable for high outdoor temperatures in summer. It can reduce the temperature of the ambient air delivered to the air inlet of the ring main unit by the negative pressure exhaust fan, thereby improving the heat dissipation effect on the ring main unit. Moreover, this method of cooling the ambient air does not require the intervention of additional external refrigeration equipment, resulting in lower energy consumption and meeting the energy-saving and environmental protection requirements of outdoor ring main units. Furthermore, the cooling effect of the underground water tank acts directly on the air entering the ring main unit, resulting in higher heat exchange efficiency. The cooled ambient air is directly delivered from underground to the ring main unit, reducing the probability of it being reheated by the ambient temperature, thus improving the heat dissipation effect on the ring main unit. In addition, when the air inlet duct passes through the underground water tank, the ambient air does not come into direct contact with the cooling medium, which directly avoids the possibility of introducing moisture during ventilation and cooling, and has no impact on the dehumidification load of the ring main unit.

[0023] 2. By controlling the negative pressure exhaust fan to intermittently start and stop and / or increase and decrease its speed at a set frequency through a pulse controller, when the flexible variable diameter pipe changes diameter in response to the working state of the negative pressure exhaust fan, on the one hand, it can promote the turbulence effect of ambient air flowing in the main duct, thereby improving the heat exchange efficiency between ambient air and the cooling medium outside the main duct; on the other hand, when the flexible variable diameter pipe contracts and returns to its original shape, it can promote the disturbance and local eddy current of the surrounding cooling medium, thereby also improving the heat exchange efficiency between the cooling medium in the buried water tank and the ambient air in the main duct. No additional external power components are required, and the energy-saving effect is more obvious.

[0024] 3. By fixing or flexibly connecting baffles to the fixed frame, either as an integral or separate unit, to the flexible reducer, or by partially wrapping the flexible reducer, the disturbance effect of the flexible reducer on the cooling medium during diameter change can be further improved. For example, the direction of disturbance transmission of the cooling medium can be directly guided or restricted. Alternatively, the oscillation of the baffles on the fixed frame can further amplify the disturbance effect of the flexible reducer on the cooling medium during diameter change. Or, it can promote the circulation and convection of the lower low-temperature cooling medium and the upper medium-temperature cooling medium in the buried water tank, ensuring the cooling effect of the cooling medium on the ambient air.

[0025] 4. By keeping the multiple branch ducts, which are interwoven in a mesh pattern, from connecting at their intersections, turbulence in the branch ducts can be avoided, thus preventing it from affecting the overall airflow of the ambient air in the intake duct. On the other hand, the multiple branch ducts can present a certain three-dimensional heat dissipation structure in the buried water tank, thereby improving the cooling effect of the cooling medium on the ambient air in the branch ducts. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the overall structure of an embodiment of this application;

[0027] Figure 2 This is a cross-sectional view of the underground water tank and air inlet pipe according to an embodiment of this application;

[0028] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0029] Figure 4 yes Figure 2 A magnified view of part B in the middle section;

[0030] Figure 5 yes Figure 2 A magnified view of part C in the middle.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Ring main unit body; 11. Air inlet; 12. Air outlet;

[0033] 2. Buried water tank; 21. Heat-conducting fins;

[0034] 3. Negative pressure exhaust fan;

[0035] 4. Air intake duct; 41. Main air duct; 411. Vertical section; 412. Horizontal section; 413. Joint; 42. Branch air duct;

[0036] 51. Flexible reducing pipe; 52. Fixing bracket; 53. Baffle plate;

[0037] 61. Condensate tank; 62. Condensate plate; 63. Annular water tank; 64. Weak spring check valve;

[0038] 71. Rainproof air intake assembly; 72. Dustproof components. Detailed Implementation

[0039] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] This application discloses an energy-saving heat dissipation ring main unit. (Refer to...) Figure 1 and Figure 2 The system includes a ring main unit 1 and an air inlet 11 and an air outlet 12 located on the ring main unit 1. Specifically, the air inlet 11 is located on the lower side wall of the ring main unit 1, and the air outlet 12 is located on the upper side wall of the ring main unit 1. A buried water tank 2 is installed below the ring main unit 1, buried 1.5m underground. The buried water tank 2 is filled with a cooling medium. Specifically, the buried water tank 2 is buried underground and more than 1.5m above the ground. The cooling medium can be water, ethylene glycol solution, salt hydrates (such as sodium acetate trihydrate), bio-based phase change materials (such as palm wax), etc. In this embodiment, cooling water is used as the cooling medium. The buried water tank 2 is made of a thermally conductive material, such as stainless steel. The ring main unit 1 is also equipped with a negative pressure exhaust fan 3. The air outlet of the negative pressure exhaust fan 3 is connected to the air inlet 11. The air inlet is connected to the air inlet pipe 4. One end of the air inlet pipe 4 passes through the cooling medium in the underground water tank 2 and extends out of the ground to one side of the ring main unit 1. The part of the air inlet pipe located outside the underground water tank 2 is wrapped with thermal insulation cotton.

[0041] The air intake duct 4 includes a main air duct 41 coiled in the underground water tank 2 and a plurality of branch air ducts 42 for connecting adjacent pipe walls of the main air duct 41. Both the main air duct 41 and the branch air ducts 42 are made of thermally conductive metal materials, such as copper or aluminum.

[0042] The main air duct 41 has multiple intervals 413, and flexible reducer pipes 51 are sealed and connected at the intervals 413. The flexible reducer pipes 51 are made of silicone or fluororubber and are spirally corrugated or have folded cavities to allow for axial expansion and contraction and radial deformation. The negative pressure exhaust fan 3 is connected to a pulse controller, which is configured to control the negative pressure exhaust fan 3 to start and stop and / or increase and decrease the speed at a set frequency, such as stopping for 30 seconds after working for 2 minutes. Alternatively, a frequency converter can be connected between the pulse controller and the negative pressure exhaust fan 3 to control the negative pressure exhaust fan 3 to increase and decrease the rated speed at a certain frequency and stop for 30 seconds after working for 5 to 10 minutes. This allows the multiple flexible reducer pipes 51 to intermittently change diameter when the negative pressure exhaust fan 3 starts and stops, promoting airflow turbulence in the main air duct 41 and disturbance of the cooling medium in the buried water tank 2. The frequency at which the pulse controller controls the negative pressure exhaust fan 3 to switch working states is measured by the ambient temperature or the temperature in the ring main unit 1. It follows the principle that the higher the target temperature, the faster the control switching frequency, so as to increase the cooling effect of the buried water tank 2 on the airflow in the air inlet duct 4.

[0043] Furthermore, referring to Figure 2 , Figure 3 and Figure 4 The main air duct 41 is fixed at the break 413 with a fixing bracket 52 for connecting the two ends of the pipe body at the break 413. The inner hollow dimension of the fixing bracket 52 along the radial direction of the main air duct 41 is larger than the outer diameter of the flexible variable diameter pipe 51 when it is expanded. In specific installation, the fixing bracket 52 can be at least three fixing rods that are equally spaced in a circular array along the axial direction of the main air duct 41. The two ends of the fixing rods are respectively fixed to the pipe bodies at both ends of the break 413 to ensure the overall structural stability of the main air duct 41.

[0044] Therefore, by utilizing the constant temperature of the soil at a depth of 1 to 3 meters underground (the temperature at a depth of 1.5 meters is usually stable at 10 to 20°C), an underground water tank 2 filled with cooling medium is buried underground. This allows the cooling medium in the underground water tank 2 to exchange heat with the surrounding soil, thereby achieving natural cooling of the cooling medium. This method is particularly suitable for cooling the ambient air when the outdoor temperature in summer reaches 30°C to 40°C. When the ring main unit 1 of this application is in operation, the negative pressure exhaust fan 3 is started. When the negative pressure exhaust fan 3 is in operation, it can draw high-temperature ambient air into the main air duct 41 and multiple branch air ducts 42 through the air inlet duct 4. When the ambient air flows in the main air duct 41 and branch air ducts 42, it can exchange heat with the cooling medium in the buried water tank 2 through the heat conduction effect of the main air duct 41 or branch air ducts 42, so as to reduce the temperature of the ambient air delivered by the negative pressure exhaust fan 3 to the air inlet 11 of the ring main unit 1, thereby improving the heat dissipation effect of the ring main unit 1; and this cooling of the ambient air relies on The heat exchange is achieved through the underground water tank 2, which eliminates the need for additional external refrigeration equipment, resulting in lower energy consumption and better meeting the energy-saving and environmental protection requirements of outdoor ring main units. Furthermore, since the underground water tank 2, which is mainly used for cooling, does not introduce new risks to the ring main unit 1, it has higher reliability. In addition, the cooling effect of the underground water tank 2 directly affects the air entering the ring main unit 1, resulting in higher heat exchange efficiency. The cooled ambient air is directly transported from underground to the ring main unit 1, reducing the probability of it being reheated by the ambient temperature, thus improving the heat dissipation effect on the ring main unit 1.

[0045] Meanwhile, the arrangement of the main air duct 41 and multiple branch air ducts 42 increases the contact area between the ambient air flowing in the air intake duct 4 and the cooling medium in the underground water tank 2, significantly improving the cooling effect of the cooling medium in the underground water tank 2 on the ambient air in the air intake duct 4. Furthermore, since the ambient air does not directly contact the cooling medium when the air intake duct 4 passes through the underground water tank 2, this directly avoids the possibility of moisture being introduced during ventilation and cooling, and has no impact on the dehumidification load of the ring main unit 1.

[0046] Furthermore, since the negative pressure exhaust fan 3 is intermittently started and stopped and / or its speed increased and decreased by a pulse controller at a set frequency, and the main air duct 41 is equipped with multiple flexible reducer pipes 51 that can change radially and axially, the airflow pressure in the main air duct 41 changes instantaneously when the negative pressure exhaust fan 3 switches its working state. Specifically, when the negative pressure exhaust fan 3 starts or increases its speed, the internal pressure of the flexible reducer pipe 51 decreases and the flow velocity of the ambient air in the flexible reducer pipe 51 increases, causing the inner diameter of the flexible reducer pipe 51 to decrease; while when the negative pressure exhaust fan 3 stops or its speed decreases, the internal pressure of the flexible reducer pipe 51 increases and the flow velocity of the ambient air in the flexible reducer pipe 51 decreases, causing the flexible reducer pipe 51 to return to its original state. Therefore, when the flexible reducing pipe 51 changes diameter in response to the switching of the negative pressure exhaust fan 3, it can, on the one hand, promote the turbulence effect of ambient air flowing in the main air duct 41, thereby improving the heat exchange efficiency between the ambient air and the cooling medium outside the main air duct 41; on the other hand, when the flexible reducing pipe 51 contracts and returns to its original shape, it can promote the disturbance and local eddy current of the surrounding cooling medium, which can also improve the heat exchange efficiency between the cooling medium in the buried water tank 2 and the ambient air in the main air duct 41. Thus, the cooling effect of the buried water tank 2 on the ambient air in the air inlet duct 4 can be significantly improved, thereby ensuring the improvement of the heat dissipation effect on the ring main unit 1.

[0047] To further improve the cooling effect of the buried water tank 2 on the airflow in the air intake duct 4, in another feasible embodiment, two buried water tanks 2 can be arranged vertically, and a medium-temperature water rising channel and a low-temperature water falling channel can be set between the two buried water tanks 2. The cooling medium can be automatically stratified by the density difference of the cooling medium in the buried water tanks 2, so that the upper buried water tank 2 is basically a medium-temperature cooling medium and the lower buried water tank 2 is basically a low-temperature cooling medium, so as to reduce the loss of heat and cold mixing and improve the cooling effect on the airflow in the main air duct 41. At this time, the main part of the main air duct 41 and multiple branch air ducts 42 should be arranged in the lower buried water tank 2.

[0048] Alternatively, in other feasible embodiments, the aforementioned flexible reducer 51 can also be provided on the branch duct 42 to similarly promote the turbulence effect of ambient air in the branch duct 42 as well as the disturbance and local eddy effect of the cooling medium; however, in order to avoid a significant impact on the load of the negative pressure exhaust fan 3, the length and / or diameter of the flexible reducer 51 on the branch duct 42 should be appropriately reduced to ensure the smooth flow of ambient air in the air inlet duct 4.

[0049] To ensure stable and smooth airflow in the air intake duct 4, in this embodiment, the main duct 41 located in the buried water tank 2 is U-shaped and includes two vertical sections 411 and one horizontal section 412. Flexible reducer pipes 51 are distributed on both the vertical and horizontal sections 411 and 412. The branch duct 42 is used to connect the two vertical sections 411. Specifically, both ends of the branch duct 42 are connected to the two vertical sections 411 respectively. Moreover, the branch duct 42 can be a straight pipe, or it can be an arc pipe, a wave pipe, a serpentine pipe, etc., which can increase the airflow path in the branch duct 42 to a certain extent and improve the heat exchange efficiency between the ambient air and the cooling medium.

[0050] The diameter of the branch duct 42 is smaller than that of the main duct 41, preferably not exceeding one-third of the main duct 41's diameter. Furthermore, the diameter of the branch duct 42 gradually increases from top to bottom to avoid lower air pressure in the lower branch duct 42 and the horizontal section 412. Multiple branch ducts 42 are distributed in a network between two vertical sections 411, and intersecting branch ducts 42 are not connected at the intersection. This avoids turbulence in the branch ducts 42, preventing it from affecting the overall airflow in the intake duct 4. It also allows the multiple branch ducts 42 to form a three-dimensional heat dissipation structure within the buried water tank 2, improving the cooling effect of the cooling medium on the ambient air in the branch ducts 42. Additionally, a smooth transition surface is provided at the corner where the branch duct 42 connects to the main duct 41 to further reduce disordered turbulence.

[0051] In a specific example, the branch duct 42 can be set as a corrugated pipe with a certain curvature, and the inner arc sides of two intersecting branch ducts 42 can be arranged opposite each other. This can make the pipe network composed of multiple branch ducts 42 present a more three-dimensional spatial structure, allowing multiple branch ducts 42 to come into contact with the low-temperature cooling medium more often, and reducing the heat exchange interference between adjacent branch ducts 42. This can improve the heat exchange efficiency between the ambient air flowing in the branch ducts 42 and the cooling medium in the buried water tank 2.

[0052] To further improve the disturbance effect of the flexible reducing pipe 51 on the cooling medium during diameter change, refer to Figure 2 , Figure 3 and Figure 4The fixed frame 52 is provided with several baffles 53 spaced apart from the flexible reducer tube 51. The baffles 53 can be integrally formed in a conical or cylindrical shape, wrapping around the entire circumference or part of the flexible reducer tube 51, or they can be multiple pieces staggered around the circumference or part of the flexible reducer tube 51. The baffles 53 can be directly fixed to the fixed frame 52, which can directly guide or restrict the transmission direction of the cooling medium under disturbance; or they can be flexibly hinged to the fixed frame 52 by flexible parts such as rubber, so that the swing of the baffles 53 on the fixed frame 52 can further amplify the disturbance effect of the highly flexible reducer tube 51 on the cooling medium when it changes diameter.

[0053] For example, in a specific instance, refer to Figure 2 , Figure 3 and Figure 4 In the vertical section 411, multiple baffles 53 are flexibly hinged to the fixed frame 52 in a staggered arrangement. These baffles 53 collectively form a cone shape with the bottom facing upwards, allowing the lower-level low-temperature cooling medium to circulate upwards with the movement of the baffles 53. This promotes the circulation and convection between the lower-level low-temperature cooling medium and the upper-level medium-temperature cooling medium in the buried water tank 2, improving the cooling effect on the ambient air in the air inlet duct 4. Correspondingly, the baffles 53 in the horizontal section 412 are fixedly connected to the fixed frame 52 and are only distributed below the flexible reducer 51. They also promote the circulation of the cooling medium in the buried water tank 2 through the disturbance caused by the diameter change of the flexible reducer 51.

[0054] In addition, considering that when the external ambient air humidity is high, the cooling air directly introduced into the ring main unit 1 may contain a certain amount of water vapor.

[0055] In another embodiment, refer to Figure 2 and Figure 5 A condenser tank 61 is connected between the main air duct 41 and the negative pressure exhaust fan 3. The condenser tank 61 is also buried underground and located above the underground water tank 2. Multiple conical condenser plates 62 are fixed in the condenser tank 61 and are arranged sequentially from bottom to top. Adjacent condenser plates 62 are spaced apart. The diameter of the cone bottom opening and the diameter of the cone top opening of the multiple condenser plates 62 from bottom to top both increase. Multiple water guide grooves are provided on the condenser plates 62 along their conical surfaces.

[0056] The bottom of the condenser 61 is provided with an annular water storage tank 63 protruding downwards. The bottom wall of the annular water storage tank 63 is provided with several weak spring check valves 64 that only allow fluid to flow out of the condenser 61, so that the condensate in the annular water storage tank 63 can be discharged by its own weight through the weak spring check valves 64. The diameter of the cone bottom opening of the lowest condenser plate 62 is not less than the minimum diameter of the annular water storage tank 63. The outlet end of the weak spring check valve 64 is connected to a drain pipe to guide the condensate into the underground soil.

[0057] Therefore, after the ambient air is cooled by the main duct 41 and the branch duct 42, it flows into the condenser tank 61 and passes through the middle of the lowest condenser plate 62 and the gaps between adjacent condenser plates 62. This allows multiple condenser plates 62 to condense the water vapor in the ambient air, forming condensate droplets that flow along multiple water guide channels on the condenser plates 62 to be collected in the annular water storage tank 63. This greatly reduces the water vapor in the ambient air entering the ring main unit 1. Moreover, compared to the drying dehumidification method, this method hardly causes a temperature rise in the ambient air entering the ring main unit 1. When the negative pressure exhaust fan 3 stops under the control of the pulse controller, the condensate stored in the annular water storage tank 63 is discharged by its own gravity through multiple weak spring one-way valves 64. When the negative pressure exhaust fan 3 is working, the weak spring one-way valves 64 can prevent outside air from entering.

[0058] Additionally, refer to Figure 1 and Figure 2 Multiple heat-conducting fins 21 are fixed to the outer wall of the buried water tank 2 to further improve the heat exchange effect between the buried water tank 2 and the underground soil, and to ensure that the cooling medium in the buried water tank 2 is always at a low temperature. Furthermore, one end of the air inlet duct 4 extending to one side of the ring main unit 1 is connected to a rainproof air inlet component 71. The air inlet end of the rainproof air inlet component 71 is equipped with a dustproof component 72. The rainproof air inlet component 71 can be a U-shaped pipe with its free end opening downwards, or it can be a rainproof cap spaced apart at the free end of the air inlet duct 4. The dustproof component 72 is several layers of filter screen installed at the free end opening of the U-shaped pipe or at the free end of the air inlet duct 4.

[0059] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An energy-saving heat dissipation ring main unit, comprising a ring main unit body (1) and an air inlet (11) and an air outlet (12) disposed on the ring main unit body (1), characterized in that, A buried water tank (2) is installed 1.5m below the ring main unit (1), and the buried water tank (2) is filled with cooling medium; a negative pressure exhaust fan (3) is also installed on the ring main unit (1), the air outlet of the negative pressure exhaust fan (3) is connected to the air inlet (11), and the air inlet is connected to the air inlet pipe (4). One end of the air inlet pipe (4) passes through the cooling medium in the buried water tank (2) and extends out of the ground and to one side of the ring main unit (1); The air inlet duct (4) includes a main air duct (41) coiled in the underground water tank (2) and a plurality of branch air ducts (42) for connecting adjacent pipe walls of the main air duct (41). Both the main air duct (41) and the branch air ducts (42) are made of thermally conductive metal material. The main air duct (41) is provided with multiple breaks (413) spaced apart and a flexible reducer pipe (51) is sealed at the break (413). The negative pressure exhaust fan (3) is connected to a pulse controller. The pulse controller is configured to control the negative pressure exhaust fan (3) to start and stop at a set frequency and / or increase or decrease the speed, so that the multiple flexible reducer pipes (51) change diameter when the negative pressure exhaust fan (3) starts and stops, thereby promoting airflow turbulence in the main air duct (41) and disturbance of the cooling medium in the buried water tank (2). The main air duct (41) is fixed at the break (413) with a fixing frame (52) for connecting the two ends of the pipe body at the break (413). The inner hollow dimension of the fixing frame (52) along the radial direction of the main air duct (41) is larger than the outer diameter of the flexible reducer (51) when it is expanded. The main air duct (41) located in the underground water tank (2) is U-shaped and includes two vertical sections (411) and one horizontal section (412). Flexible reducer pipes (51) are distributed on both the vertical section (411) and the horizontal section (412). The branch air duct (42) is used to connect the two vertical sections (411). The fixed frame (52) is provided with several baffles (53) spaced apart from the flexible reducer (51). The baffles (53) on the vertical section (411) are multiple pieces flexibly hinged to the fixed frame (52) in a staggered manner. The multiple baffles (53) are formed into a cone shape with the bottom of the cone facing upward, so that the low-temperature cooling medium in the lower layer can flow upward with the swing of the baffles (53), promoting the circulation and convection of the low-temperature cooling medium in the lower layer and the medium-temperature cooling medium in the upper layer in the buried water tank (2). The baffles (53) in the horizontal section (412) are fixedly connected to the fixed frame (52) and are only distributed below the flexible reducer (51). The circulation of the cooling medium in the buried water tank (2) is promoted by the disturbance when the flexible reducer (51) changes diameter.

2. The energy-saving heat dissipation ring main unit according to claim 1, characterized in that, The diameter of the branch duct (42) is smaller than that of the main duct (41). Multiple branch ducts (42) are distributed in a network between the two vertical sections (411), and the two intersecting branch ducts (42) are not connected at the intersection.

3. The energy-saving heat dissipation ring main unit according to claim 1, characterized in that, A smooth transition surface is provided at the corner where the branch duct (42) connects to the main duct (41).

4. An energy-saving heat dissipation ring main unit according to any one of claims 1-3, characterized in that, A condenser tank (61) is connected between the main air duct (41) and the negative pressure exhaust fan (3). A plurality of cone-shaped condenser plates (62) are fixed in the condenser tank (61) and are arranged sequentially from bottom to top. The condenser plates (62) are spaced apart from each other. The diameter of the cone bottom opening and the diameter of the cone top opening of the plurality of condenser plates (62) from bottom to top both show an increasing trend. The bottom of the condenser (61) is provided with an annular water storage tank (63) protruding downwards, and the bottom wall of the annular water storage tank (63) is provided with a number of weak spring check valves (64) that only allow fluid to flow out of the condenser (61).

5. The energy-saving heat dissipation ring network cabinet according to claim 4, characterized in that, The condenser plate (62) is provided with a plurality of water guide grooves arranged along its conical surface.

6. The energy-saving heat dissipation ring main unit according to claim 1, characterized in that, The underground water tank (2) has multiple heat-conducting fins (21) fixed to its outer wall.

7. The energy-saving heat dissipation ring main unit according to claim 1, characterized in that, The air inlet duct (4) extends to one end of the ring main unit (1) and is connected to a rainproof air inlet component (71). The air inlet end of the rainproof air inlet component (71) is provided with a dustproof component (72).

Images