CN211352350U - Cooling energy-saving device for outdoor cabinet of small base station - Google Patents

Abstract

The cooling energy-saving device for the small-sized base station outdoor cabinet is a set of closed circulating finned tube heat dissipation device arranged on the small-sized base station outdoor cabinet, when the temperature outside the cabinet is lower than the temperature of hot air inside the cabinet, hot air in the cabinet can be automatically conveyed to the upper inlet of a finned tube heat radiator on the top of the cabinet by utilizing chimney effect and siphon effect, the heat is dissipated by the finned tube heat radiator, and then the dissipated air is guided into the lower space inside the cabinet from the lower outlet of the finned tube heat radiator, so that the air in the cabinet automatically and continuously flows in a closed pipeline outside the cabinet in a circulating manner, and exchanges heat with cooler air outside the pipeline through the pipeline wall in the flowing process, and the purpose of automatically dissipating the heat of the air in the cabinet is achieved. The device has simple structure, safety and reliability, does not need energy supply, can reduce the starting time of the air conditioner, saves the power for the air conditioner, prolongs the service life, does not enter dust, does not cause pollution and hardly needs maintenance.

Description

Cooling energy-saving device for outdoor cabinet of small base station

The technical field is as follows: the invention belongs to the technical field of communication base station energy conservation.

(II) background technology: in the field of mobile communication technology, with the progress of technology, a small outdoor "integrated communication base station" has recently appeared, and various basic elements and infrastructure equipment which constitute the base station after improvement are deeply integrated and combined and are simply designed, and are installed in a small outdoor cabinet. According to task needs and equipment conditions, a small outdoor cabinet of an integrated base station is divided into a plurality of separated and interconnected unit cabins and is jointly installed with an antenna iron tower. Many such small integrated cabinet-type communication base stations are now visible alongside the sidewalk at the street.

Because electrical equipment arranged in the outdoor cabinet can generate heat in the use process, the heat needs to be dissipated so as to maintain the normal working temperature of the equipment and the electrical equipment; meanwhile, the cabinet placed outdoors can be irradiated by the sun, the temperature inside the cabinet can be increased by the irradiation of the sun and the higher temperature in summer, and the allowable upper temperature limit inside the cabinet can be possibly exceeded. Therefore, when the heat dissipation problem of the cabinet is solved, the problem of preventing external heat from entering the cabinet is also solved. The common cabinet adopts a double-layer metal plate heat insulation structure with foam heat insulation materials sandwiched in the middle to prevent sun and external heat from entering; the heat dissipation method usually adopts a small-sized air conditioner for heat dissipation and temperature control and a ventilation method with a filter screen. Since the electrical equipment inside the cabinet is continuously operated, heat is continuously generated, and heat dissipation is continuously performed. Therefore, it is necessary to continuously consume electric power regardless of cooling by the air conditioner or ventilation. Even if the filter screen is used, the filter screen needs to be maintained frequently, and the ventilation and air exchange can bring out pollutants such as dust and the like into the cabinet, so that the normal work of equipment is influenced.

The applicant has investigated the actual situation of outdoor cabinets of more than one hundred small base stations in the beijing area, and has seen that most of the small base stations adopt the mode of opening the cabinet door to radiate heat of equipment in the cabinet, which means that the small air conditioners and fans used in the existing cabinets are not good. In order to solve the problem, the applicant of the present invention provides a 'self-circulation cooling energy-saving device outside an air cabinet of a small-sized base station outdoor cabinet', which utilizes the chimney effect and siphon effect formed in a vertical inverted U-shaped closed pipeline communicated with the cabinet when the temperature outside the cabinet is lower than the temperature of hot air at the upper part of the cabinet, so that the air in the cabinet can automatically circulate in the pipeline outside the cabinet, and can exchange heat with cooler air outside the cabinet through the pipeline wall in the flowing process, thereby automatically cooling the air in the cabinet. The continuous natural circulation ventilation device which does not need energy supply is utilized to cool the cabinet, the opening time of the air conditioner can be greatly reduced, the purpose of energy saving and cooling can be achieved, dust can not enter, pollution in the cabinet can not be caused, and the service life of the air conditioner can be prolonged. However, the technical solution has a disadvantage that the inverted U-shaped closed pipeline for cooling is relatively high, and needs to be supported by a steel tower or a special support rod with a support frame, which is not suitable for use in many places (such as roadside). The cooling energy-saving device for the outdoor cabinet of the small base station is a short and compact energy-saving device which can also enable air in the cabinet to automatically flow in a pipeline outside the cabinet in a circulating manner and exchange heat with cooler air outside the cabinet through the pipeline wall in the flowing process, so that the air in the cabinet can be automatically cooled.

(III) the invention content: the invention relates to a cooling energy-saving device used for an outdoor cabinet of a small-sized base station, which is characterized in that the cooling energy-saving device is arranged on an outdoor cabinet (8) of the small-sized base station, hot air in the upper space in the cabinet passes through an upper air pipe (2) capable of generating a chimney effect from an air inlet (1) arranged on the top surface or the side surface of the upper part of the cabinet, an inverted U-shaped pipeline structure consisting of a transverse pipe [3] and a descending air pipe [4] is conveyed to an upper inlet of a finned tube radiator [5] horizontally arranged on the top of the cabinet, and then passes through a descending air return pipe [6] which is attached to the outer side surface of the cabinet and descends or penetrates into the cabinet from the top of the cabinet to reach the lower space of the cabinet from the lower outlet of the finned tube radiator [5], and the air outlet [7] of the pipeline communicated with the lower space of the cabinet, the air after the heat dissipation of the sealed pipeline system with siphon action is led into a set of sealed pipeline heat dissipation system of the lower space in the cabinet [8 ]; the height can be further reduced, a transverse pipe [3] and a downward air pipe [4] are omitted, hot air in the upper space in the cabinet is directly conveyed to an inlet above a finned tube radiator [5] horizontally arranged on the top of the cabinet through a short section of upward air pipe [2], and then the air after heat dissipation of the finned tube radiator is guided into the lower space in the cabinet [8] from an outlet below the finned tube radiator [5] through a downward air return pipe [6] and an air outlet [7] of a pipeline system.

It can be seen that such heat dissipation duct system is much lower than the previous higher "air-out-cabinet self-circulation" cooling and energy saving device "of the small base station outdoor cabinet. When an inverted U-shaped pipeline structure with an ascending air pipe, a transverse pipe and a descending air pipe is connected with an upper inlet of a finned tube radiator horizontally arranged on the top of a cabinet, the height of the transverse pipe above the cabinet is about 1.5 m generally; if the transverse pipe and the downward air pipe are omitted, the hot air in the upper space in the cabinet is directly communicated with an upper inlet of the finned tube radiator horizontally arranged on the top of the cabinet through a section of upward air pipe, and the total height of the finned tube radiator is less than 1 meter on the cabinet. The diameter of the pipe may be chosen between 3 cm and 10 cm. The compact structure is obviously easier to assemble and use on the outdoor unit cabinet of the small-sized base station, and is more convenient to use particularly for the outdoor unit cabinet of the small-sized base station on the ground with narrow road sides.

Compared with the traditional 'air cabinet external self-circulation' cooling energy-saving device 'of the small-sized base station outdoor machine cabinet, the cooling energy-saving device' used by the small-sized base station outdoor machine cabinet obviously reduces the height, obviously weakens the strength of chimney effect and siphon effect, and adopts a method capable of obviously prolonging the length of a heat dissipation flow path of gas in a pipeline and the heat dissipation area in order to make up for the deficiency of heat dissipation capacity, namely, a zigzag multilayer horizontal finned tube radiator is arranged on the machine cabinet. The finned tube radiator horizontally arranged on the top of the cabinet has a multilayer composite structure, each layer is formed by connecting two or three or more parallel finned tubes in parallel, and the finned tube radiator is arranged in a layered series or parallel and descending manner layer by layer from an air inlet at the upper part. The upper layer and the lower layer can be two layers, three layers or more, the layers are connected in series or in parallel layer by layer in a descending manner, air in the air cooler can flow from top to bottom, and the air can exchange heat with cold air outside the pipeline through the pipe wall and the fins on the pipe wall in the flowing process, so that the air is cooled by heat until the air flows out of an outlet at the bottom layer of the finned pipe radiator and flows into the lower space of the cabinet through the descending air return pipe and the air outlet of the pipeline system, the air in the cabinet circularly flows outside the cabinet in the pipeline outside the cabinet, and the air in the cabinet is exchanged heat with the cold air outside the pipeline through the pipe wall in the circulating flowing process, so that the aim of cooling the air in the cabinet is fulfilled.

As long as the temperature outside the cabinet is lower than the temperature of the hot air at the upper part inside the cabinet, under the condition of installing a cooling energy-saving device used by the small-sized base station outdoor cabinet, the hot air in the vertical up air pipe rises due to the chimney effect formed by light specific gravity, passes through the top transverse pipe, the down air pipe and the closed pipeline system of the radiator which is horizontally arranged on the top of the cabinet and descends step by step, the finned pipe is separated from the pipeline wall which is easy to transfer heat and the fins on the pipeline, exchanges heat with the cooler air outside the cabinet, dissipates heat while flowing, gradually cools and becomes heavy, then sinks, and siphons are generated until the air flows out of the air outlet of the pipeline and enters the lower space of the cabinet. After hot air at the upper part in the cabinet enters the pipeline, the vacancy at the upper part is filled by rising cooler air at the lower part to form circular flow, so that the temperature in the cabinet is reduced. In the whole process, the chimney effect of the ascending air pipe plays a role, and the siphon effect in the closed pipeline plays a role, so that the natural circulation flow of the gas is promoted. The flow is not externally supplied and the circulation of the air is continued as long as the temperature of the air outside the cabinet is lower than the temperature of the hot air in the upper part of the cabinet. Therefore, the purpose of cooling hot air in the cabinet can be achieved, and the temperature in the cabinet is close to the cooler temperature outside the cabinet. Here, it should be noted that the entire piping system must be airtight, otherwise it is difficult to form an effective siphon effect and a unidirectional circulation flow of air.

In summer, when the temperature of the air outside the cabinet is higher than the temperature of the air at the upper part inside the cabinet, the air in the pipeline system also becomes hot. If the air in the duct becomes warmer than the hot air in the cabinet, it will not enter the cabinet because the warmer air is lighter in weight than the air in the cabinet and floats on top. At the moment, the air conditioner is started to cool, and the hot air in the pipeline can not increase the load of the air conditioner.

The sealing connection method of the pipeline can be welding, or can be connected by screw port butt joint or flange butt joint with a sealing washer.

The air-tight heat dissipation pipeline of the cooling energy-saving device used for the outdoor cabinet of the small base station is made of metal materials which are easy to transfer heat. Since the material is used outdoors, the material itself is weather-resistant or subjected to a weather-resistant surface treatment. In addition, in order to enhance the area, efficiency and speed of heat exchange of air inside and outside the pipeline, the finned tube radiator which is horizontally arranged on the top of the cabinet and descends step by step is adopted, other pipelines are also manufactured by using finned tubes with radiating fins outside the pipeline as much as possible, and particularly, the finned tubes are preferably made of stainless steel or aluminum alloy finned tubes.

In order to enhance the installation strength, stability and safety of the cooling and energy-saving device used by the outdoor cabinet of the small base station, square frame-shaped supports (9) capable of fixing the proper position of a pipeline system are arranged at four corners of the upper surface of the cabinet (8), and a protective net (10) is arranged between frames of the supports (9). The height of the support is generally within 80 cm.

Because the cooling energy-saving device used by the outdoor cabinet of the small base station is used outdoors, the phenomenon that the cooling energy-saving device is exposed to the sun is avoided. The sun is not beneficial to heat dissipation, so a sun-shading board (11) capable of shading sun needs to be additionally arranged on the top surface of the pipeline capable of being shaded by the sun and three sunny surfaces of east, south and west. Sun-shading boards on the upper air pipe [2], the transverse pipe [3] and the lower air pipe [4] are attached to the periphery of the pipeline in a sun-shading, wind-proof and contactless manner; the sun shield of the finned tube radiator [5] horizontally arranged on the top of the cabinet is arranged on a bracket [9] on the top of the cabinet, slightly separated from the radiating pipeline by a certain distance and not contacted with the radiating pipeline, so that the heat generated by sun exposure is prevented from being transferred to the radiating pipeline. In order to shade the sun and not to shield the wind so as to facilitate heat dissipation, the sun-shading board can be divided into a plurality of pieces which are independent and staggered, and appropriate gaps which can be ventilated are arranged among the pieces. The sun shield on the bracket (9) is preferably arranged in a vertical V shape to prevent hot air from being blown to the heat dissipation pipeline. A proper solar cell panel [12] can be further installed on the protective net [10] or the sun shield [11], a small fan [13] which does not affect natural ventilation and is provided with a storage battery and a temperature control mechanism is installed near an air inlet [1] of a pipeline system, and when the temperature difference between the inside and the outside of a hot cabinet is smaller in daytime, the small fan powered by solar energy is automatically started, the circulation flow of air is accelerated, and the heat dissipation capability is enhanced.

The small outdoor all-in-one machine base station realizes energy conservation by utilizing the cooling energy-saving device used by the small outdoor base station cabinet, has low cost of one-time investment, is safe and reliable, does not need frequent maintenance and subsequent investment, and has no noise and pollution completely. As long as the temperature outside the cabinet is not higher than the temperature of the hot air in the cabinet, the device can continuously and automatically run to play the role of energy conservation and temperature reduction. In addition, the device is installed on the cabinet, occupies space above the cabinet, does not occupy lateral area and space, has not very high total height, and is suitable for narrow roadside installation and use with limited lateral area.

The energy-saving device is suitable for being used nationwide, even in regions with higher air temperature in the south, the temperature outside the cabinet can be in a time period of which the temperature is lower than the temperature of hot air in the cabinet for most of time, and the cooling device can automatically play roles of cooling and saving energy.

(IV) description of the drawings: fig. 1 is a longitudinal schematic view of a cooling and energy-saving device used for a small-sized base station outdoor cabinet and mounted on an integrated base station outdoor cabinet. The front sun visor is not shown here in order to highlight the theme.

The path of the air of the cabinet circulating in the sealed pipeline of the cooling and energy-saving device is shown from the mark [1] to the mark [7] through the marks [2], [3], [4], [5], [6 ].

Wherein, the mark [1] represents an air inlet of the pipeline device and is also an air outlet arranged at the upper part (top part) of the cabinet; the mark [2] represents the ascending trachea; reference [3] denotes the top transverse tube; the mark [4] represents a descending air pipe, the mark [5] represents a finned tube radiator horizontally arranged on the top surface of the cabinet, the mark [6] represents a descending air return pipe, the mark [7] represents an air outlet, and the mark [8] represents the cabinet. The mark [9] represents a bracket mounted on the top surface of the cabinet [8], the mark [10] represents a protective net between bracket frames, the mark [11] represents a sun shield (the sun shield on the front surface of the bracket is not shown), and the mark [12] represents an additional solar cell panel on the sun shield on the side surface of the bracket. Reference [13] indicates a small fan fitted with a battery and temperature control mechanism, installed near the air inlet of the duct system.

(V) specific embodiment: generally, the cabinet of the small base station can be designed and manufactured as a whole according to the schematic illustration of the attached drawings of the specification, and the cabinet of the existing small base station can also be subjected to energy-saving modification by additionally installing a cooling energy-saving device used for an outdoor cabinet of the small base station. Compared with the conventional cabinet, the cooling energy-saving pipeline system is added. The sealed pipeline system for the cooling and energy-saving device used for the outdoor cabinet of the small base station is formed by sealing relatively light metal finned tubes (such as aluminum alloy finned tubes or stainless steel finned tubes) which are easy to transfer heat and have weather resistance. It is important to note that the piping of the set of devices is in a gas-tight connection from the inlet port [1] to the outlet port [7 ]. But the connection to the cabinet must also be sealed. That is to say, after the air in the rack gets into the pipeline, in the whole rack extrinsic cycle's in-process, neither can flow out from certain gap, also can not have the rack outside air to flow in from certain gap. The whole pipeline system can have effective siphon effect and play the role of automatic circulation cooling only by realizing sealing.

Although the circulating ventilation system of the device is not directly communicated with the air outside the cabinet, the circulating ventilation system can exchange heat with the air outside the cabinet through the wall of the pipeline device, particularly the pipe wall and the fins of the metal finned pipe with large contact area and high heat transfer capacity. And as long as the temperature outside the cabinet is lower than that of the hot air above the inside of the cabinet, the hot air entering the pipeline is subjected to heat exchange with cooler air outside the cabinet to dissipate heat, and then automatically sinks along the descending air pipe, further dissipates heat and sinks through the finned tube radiator horizontally arranged on the top surface of the cabinet, and finally flows into the cabinet from the descending air return pipe and the air outlet, and meanwhile, the hot air above the inside of the cabinet also automatically flows into the pipeline of the heat dissipation device from the air inlet due to the chimney effect and the siphon effect, sequentially passes through the ascending air pipe, the top transverse pipe, the descending air pipe and the finned tube radiator horizontally arranged on the top surface of the cabinet, fully dissipates heat, then flows back into the cabinet through the air return pipe and the air outlet to form unidirectional circulation flow without reverse flow. In the circulation process, the hot air flowing into the cabinet of the pipeline system exchanges heat with cooler air outside the cabinet only through the wall and the fins of the pipeline. Because in the whole heat exchange process, the air is closed by the pipeline and does not directly enter the air outside the cabinet, the pollutants such as dust and the like cannot be brought into the cabinet. The circulating flow is realized by utilizing the natural law and relying on the lifting and descending functions caused by the different specific gravities of the hot air and the cold air and the natural ventilation formed by the siphon effect, so that special energy supply is not needed, and noise and pollution are avoided. And in summer, the air temperature is hot, when the air temperature outside the cabinet is higher than the hot air temperature above the inside of the cabinet, even if the hot air outside the cabinet heats the air in the pipeline outside the cabinet, because the specific gravity of the air in the pipeline, which is hotter than the hot air above the inside of the cabinet, is lighter, the air cannot flow into the cabinet from the pipeline, the air temperature in the cabinet cannot be further raised, and the cooling by the air conditioner in the state cannot be influenced.

At the top surface four corners installing support of rack, the support can play the supporting role to pipe-line system, and the protection network on the support can also play the guard action to pipe-line system simultaneously. On the top and side of the bracket, a sun visor capable of shading sun and ventilating is installed like a blind. A solar cell panel with proper specification can be additionally arranged on the strip-shaped sun shield on the side surface, and power can be supplied to a small fan which is arranged near an air inlet of a pipeline system and is provided with a storage battery and a temperature control mechanism.

Claims (4)

1. A temperature reduction and energy saving device used for an outdoor cabinet of a small base station is characterized in that the device is arranged on an outdoor cabinet [8] of the small base station, hot air in the upper space in the cabinet passes through an upper air pipe [2] capable of generating a chimney effect from an air inlet [1] arranged on the top surface or the side surface of the upper part of the cabinet [8], is conveyed to an upper inlet of a finned tube radiator [5] horizontally arranged on the top of the cabinet [8] through a transverse pipe [3] and a lower air pipe [4], then passes through a lower outlet of the finned tube radiator [5] and a lower air return pipe [6] which is attached to the outer side surface of the cabinet [8] and descends or penetrates into the cabinet from the top of the cabinet [8] to reach the lower space of the, and the air outlet [7] of the pipeline communicated with the lower space of the cabinet [8], lead the air after heat dissipation into a set of sealed pipeline heat dissipation systems of the lower space in the cabinet [8] to form; or a transverse pipe [3] and a downward air pipe [4] are omitted, hot air in the upper space in the cabinet [8] is directly conveyed to an inlet above a finned tube radiator [5] horizontally arranged on the top of the cabinet [8] through a section of upward air pipe [2], and then the air after heat dissipation of the finned tube radiator [5] is guided into the lower space in the cabinet [8] from an outlet below the finned tube radiator [5] through a downward air return pipe [6] and an air outlet [7] of a pipeline system.

2. The cooling and energy saving device for the outdoor cabinet of the small-sized base station as claimed in claim 1, wherein the finned tube radiator [5] horizontally arranged on the top of the cabinet [8] has a multi-layer composite structure, each layer is composed of two or three or more parallel finned tubes, and is divided into two layers, three layers or more from the air inlet at the upper part, and the layers are connected in series or in parallel and descend layer by layer, so that the air inside can be cooled from heat by heat exchange with the cool air outside the pipeline in the process of flowing from top to bottom until the air flows out from the outlet at the bottom of the finned tube radiator, and then flows into the lower space of the cabinet [8] through the descending air return pipe [6] and the air outlet [7] of the pipeline system.

3. The cooling and energy saving device for the outdoor cabinet of the small base station as claimed in claim 1, wherein the four corners of the upper surface of the cabinet [8] are provided with brackets [9] capable of fixing the proper position of the pipeline system, a protective screen [10] is arranged between the frames of the brackets [9], and a sun shield [11] is arranged on the sunny side.

4. The cooling and energy saving device for the outdoor cabinet of the small base station as claimed in claim 1 is characterized in that a solar cell panel [12] is installed on a protective screen [10] or a sun shield [11], a small fan [13] which does not affect natural ventilation and is provided with a storage battery and a temperature control mechanism is installed near an air inlet [1] of a pipeline system, and the flow of air in the pipeline can be accelerated when the small fan is turned on.

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