CN116828822A - Heat radiation system for wireless communication base station - Google Patents

Abstract

The application provides a heat dissipation system for a wireless communication base station, comprising: a heat exchanger; the outer shell is arranged outside the heat exchanger, the outer shell is provided with an air inlet grille, a filter piece is arranged between the air inlet grille and the heat exchanger, and a cooling fan is arranged on the other side of the outer shell opposite to the air inlet grille; the cleaning assembly is arranged in the outer shell and is positioned between the air inlet grille and the filter piece, and comprises a winding rod which is parallel to the filter surface of the filter piece and is vertically arranged, and the winding rod is configured to move along the horizontal direction parallel to the filter surface and rotate around the axis of the winding rod in the moving process; the filiform sundries which are easy to wind and adhere in the air flow can be filtered through the filter element, so that the sundries are adhered to the filter surface of the filter element, then the filter element works through the cleaning assembly, and the sundries adhered to the filter surface are wound on the winding rod through the movement of the winding rod along the direction of the filter surface and the simultaneous rotation, so that the filter element is cleaned, and the problem that the sundries are difficult to clean is solved.

Description

Heat radiation system for wireless communication base station

Technical Field

The application relates to the technical field of wireless communication equipment, in particular to a heat dissipation system for a wireless communication base station.

Background

The wireless communication base station is a device for transmitting and receiving wireless communication signals, and the base station generates a large amount of heat during operation, so that the base station needs to be provided with a heat dissipation system.

The base station equipment is generally arranged in the machine room, the heat radiation system is arranged in the machine room, the machine room is internally radiated to enable the machine room to be kept in a constant temperature state within a certain range, so that the base station equipment is guaranteed to work normally.

Generally, in order to ensure the heat exchange efficiency of the first heat exchanger, the first heat exchanger is configured with a dust filtering member, and the dust filtering member filters the heat dissipation air flow pumped by the heat dissipation fan, however, because some base stations are disposed in remote areas, the environments of the remote areas are severe and complex, the problem of failure of the heat dissipation system due to low heat exchange efficiency of the first heat exchanger is easy to occur, and according to statistics, the reasons of the failure are that the temperature is high in summer on one hand, and on the other hand, due to frequent insect activities in summer, some insects can spit out a wire net, so that the dust filtering member is often arranged on the periphery of the dust filtering member, the wire net is further adhered to the surface of the dust filtering member, and the air permeability of the dust filtering member is poor, so that the heat exchange efficiency of the first heat exchanger is reduced, and the failure is caused.

Disclosure of Invention

In view of the above, the present application provides a heat dissipation system for a wireless communication base station, which is used for solving the technical problems existing in the prior art.

The application provides a heat dissipation system for a wireless communication base station, comprising:

the heat exchanger is arranged outside the base station machine room;

the heat exchanger comprises an outer shell, a heat exchanger and a heat exchange device, wherein the outer shell is arranged outside the heat exchanger, an air inlet grille is arranged on one side wall of the outer shell, a filtering piece is arranged between the air inlet grille and the heat exchanger, and a cooling fan is arranged on the other side, opposite to the air inlet grille, of the outer shell;

the cleaning component is arranged in the outer shell and positioned between the air inlet grille and the filter piece, and comprises a winding rod which is parallel to the filter surface of the filter piece and is vertically arranged, and the winding rod is configured to move along the horizontal direction parallel to the filter surface and rotate around the axis of the winding rod in the moving process so as to wind and clean sundries attached to the filter surface.

Further, the air inlet grille is rotatably provided with a one-way valve plate, a torsion spring is arranged between the one-way valve plate and the outer shell, the one-way valve plate is in a state of closing the air inlet grille under the action of the elasticity of the torsion spring, and the one-way valve plate is configured to allow airflow to flow into the outer shell in one way.

Further, a first guide rod and a first screw rod are horizontally arranged in the outer shell, a first sliding block is arranged on the first guide rod in a guiding sliding manner, a first threaded hole matched with the first screw rod is formed in the first sliding block, a first driving motor is connected with the first screw rod in a driving manner, and the winding rod is rotatably arranged on the first sliding block.

Further, racks are arranged on the outer shell at intervals parallel to the first guide rods, and gears meshed with the racks are sleeved on the winding rods.

Further, along the axis direction of winding pole, the interval is provided with a plurality of miniature winding posts on the outer peripheral face of winding pole, be provided with a plurality of miniature recesses along the horizontal direction on the filter face, a plurality of miniature recesses with a plurality of miniature winding posts one-to-one sets up.

Further, the gear sliding sleeve is shot in the outside of the winding column and is in non-rotating fit with the winding column, a limiting column is arranged between the winding column and the gear, a cutting edge is arranged on the lower end face of the gear, the limiting column is configured to be capable of being switched between a state of extending out of and retracting into the outer peripheral face of the winding column, a driving column is arranged at the lower end portion of the winding column, and the driving column is used for driving the gear to move upwards to a position meshed with the rack when the gear is in sliding contact with the driving column.

Further, when the gear is in a position meshed with the rack, a first electromagnet is arranged above the gear, and a first permanent magnet which is repulsed with the first electromagnet is arranged on the gear.

Further, the miniature winding column is in telescopic fit with the winding rod.

Further, the outer peripheral surface of the winding column is different from the two opposite sides of the miniature winding column, the inner peripheral surface of the gear is provided with a matching key in guiding sliding fit with the strip-shaped groove, the lower end part of the matching key extends out of the range of the gear, and the lower end part of the matching key is provided with the cutting edge.

Further, two guide members are arranged in the outer shell at intervals in parallel, each guide member is provided with a sliding member in a guiding and sliding manner, each guide member is provided with a linear driving member between the corresponding sliding member and the outer shell, two ends of the first guide rod and the first screw rod are respectively arranged on the two sliding members, the guiding direction of the guide member is perpendicular to the first guide rod, and the linear driving member can drive the sliding members to move in a direction away from the filtering member.

Advantageous effects

The application provides a heat dissipation system for a wireless communication base station, comprising: the heat exchanger is arranged outside the base station machine room; the heat exchanger comprises an outer shell, a heat exchanger and a heat exchange device, wherein the outer shell is arranged outside the heat exchanger, an air inlet grille is arranged on one side wall of the outer shell, a filtering piece is arranged between the air inlet grille and the heat exchanger, and a cooling fan is arranged on the other side, opposite to the air inlet grille, of the outer shell; a cleaning assembly disposed within the outer housing and between the intake grill and the filter, the cleaning assembly including a winding rod disposed parallel to and vertically with a filter surface of the filter, the winding rod being configured to be movable in a horizontal direction parallel to the filter surface and to be rotated about an axis thereof during movement to wind and clean debris attached to the filter surface; the filiform sundries which are easy to wind and adhere in the air flow can be filtered through the filter element, so that the sundries are adhered to the filter surface of the filter element, then the filter element works through the cleaning assembly, and the sundries adhered to the filter surface are wound on the winding rod through the movement of the winding rod along the direction of the filter surface and the simultaneous rotation, so that the filter element is cleaned, and the problem that the sundries are difficult to clean is solved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings.

Fig. 1 is a schematic diagram of the overall structure of a heat dissipation system for a wireless communication base station according to the present application.

Fig. 2 is a schematic diagram of an internal structure of a heat dissipation system for a wireless communication base station according to the present application.

Fig. 3 is a schematic diagram of a partial structure of an inner part of an outer casing in a heat dissipation system for a wireless communication base station according to the present application.

Fig. 4 is a schematic diagram of a partial enlarged structure at a position a in the heat dissipation system for a wireless communication base station according to the present application shown in fig. 3.

Fig. 5 is a schematic diagram of a partial enlarged structure at a position B in the heat dissipation system for a wireless communication base station according to the present application shown in fig. 3.

Fig. 6 is a schematic diagram of a partially enlarged structure of a cleaning component in a heat dissipation system for a wireless communication base station according to the present application.

Fig. 7 is a schematic perspective view of a connection of a first screw, a first guide rod, a linear driving member and a sliding member in a heat dissipation system for a wireless communication base station according to the present application.

Fig. 8 is a schematic cross-sectional view of an air intake grille of an outer casing in a heat dissipating system for a wireless communication base station according to the present application.

Fig. 9 is a schematic diagram of a partial enlarged structure of a winding rod in a heat dissipation system for a wireless communication base station according to the present application.

Fig. 10 is a schematic diagram of a partially enlarged structure at C in the heat dissipation system for a wireless communication base station according to the present application shown in fig. 9.

Fig. 11 is a schematic diagram of a partial enlarged structure at D in the heat dissipation system for a wireless communication base station according to the present application shown in fig. 9.

Fig. 12 is a schematic view of a partially enlarged structure of a cross section of a winding rod along a bar-shaped groove direction in a heat dissipation system for a wireless communication base station according to the present application.

Fig. 13 is a schematic diagram of a partially enlarged structure at E in the heat dissipation system for a wireless communication base station according to the present application shown in fig. 12.

Detailed Description

The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the application are shown in the drawings.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The present application provides a heat dissipation system for a wireless communication base station, as a specific embodiment, referring to fig. 1 to 3, the heat dissipation system provided by the present application includes:

the heat exchanger 1 is arranged outside the base station machine room;

an outer shell 2, which is arranged outside the heat exchanger 1, wherein an air inlet grille 21 is arranged on one side wall of the outer shell 2, a filter element 3 is arranged between the air inlet grille and the heat exchanger, and a cooling fan 4 is arranged on the other side, opposite to the air inlet grille 21, of the outer shell 2;

the cleaning assembly 5 is arranged in the outer shell 2 and is positioned between the air inlet grille and the filter element 3, the cleaning assembly 5 comprises a winding rod 51 which is parallel to the filter surface of the filter element 3 and is vertically arranged, and the winding rod 51 is configured to move along the horizontal direction parallel to the filter surface and rotate around the axis thereof in the process of movement so as to wind and clean sundries attached to the filter surface.

Specifically, referring to fig. 1, the equipment of the wireless communication base station is disposed in a machine room 9, the machine room is internally provided with a first heat exchanger 7, the first heat exchanger 7 is communicated with an external heat exchanger 1 through a compressor 8, the compressor compresses a refrigerant and then passes through the heat exchanger 1 to release heat, the heat is emitted to the exterior of the machine room by the heat exchanger 1, and then enters the first heat exchanger 7, the refrigerant expands and absorbs heat in the volume of the first heat exchanger 7, so as to achieve the purpose of heat dissipation in the machine room, in the prior art, the heat exchanger 1 is generally integrally disposed in an outer shell 2 and dissipates heat by blowing by a heat dissipation fan 4, but after long-term use, dust and sundries, especially sundries which are difficult to clean, such as willow, spider silk and the like, are attached to the exterior of the heat exchanger 1, especially in a base station in a remote region, the spring to summer, so that the heat exchange performance of the heat exchanger 1 is poor, the application sets up the air inlet grille on the outer shell, sets up the filter board net 3, sets up the cleaning component 5 between the air inlet grille and the filter element 2, when the cooling system works, the cooling fan works to make the air flow enter the outer shell through the air inlet grille, pass through the filter element, then pass through the heat exchanger 1 and then pass through the cooling fan to be discharged outside the shell, the filter element can filter the catkin and spider silk in the air flow, so that the sundries are adhered on the filter surface of the filter element, when the air permeability of the filter element is poor or the heat dissipation is incomplete, the cleaning component 5 starts working, when working, the sundries adhered on the filter surface are wound on the winding rod through the winding rod along the direction of the filter surface and rotates at the same time, thus realizing the cleaning of the filter element, solves the difficult problem that the sundries are difficult to clean.

Further, as a preferred embodiment, referring to fig. 8, the air intake grille 21 is rotatably provided with a check valve plate 210, a torsion spring is provided between the check valve plate 210 and the outer case, the check valve plate 210 is in a state of closing the air intake grille under the elastic force of the torsion spring, and the check valve plate 210 is configured to allow air flow to flow into the outer case 2 in one direction. Specifically, in general, the spider silk source attached to the filter element has two aspects, namely, on one hand, the insects such as spiders and the like capable of spinning enter the outer shell through the air inlet grille and spin the threads on the inside, on the other hand, the plants around the base station have spider silk, some spider silk is withdrawn in the weather such as strong wind and rain, and when the spider silk falls beside the outer shell, the spider silk can enter the outer shell along with the air flow entering the outer shell to be attached to the filter element, and the one-way valve plate 210 is arranged at the air inlet grille 21, so that the one-way valve plate 210 is in a state of closing the air inlet grille when the cooling fan is not in operation, and can be blown open by the air flow when the cooling fan is in operation, thereby closing the air inlet grille when the cooling fan is not in operation, preventing external insects from entering the outer shell, and reducing the risk of blocking the filter element.

Further, as a specific embodiment, the connection mode and the working principle of the winding rod 51 and the outer casing are as follows: referring to fig. 3, 6 and 7, a first guide rod 50 and a first screw rod 52 are horizontally disposed in the outer housing 2, a first slider 501 is slidably disposed on the first guide rod 50 in a guiding manner, a first threaded hole adapted to the first screw rod 52 is disposed on the first slider 501, a first driving motor 520 is connected to the first screw rod in a driving manner, and the winding rod 51 is rotatably disposed on the first slider 501.

Specifically, referring to fig. 3 and 6, a first guide rod 50 and a first screw rod 52 are horizontally arranged at the upper part of the outer casing, a first sliding block 501 is arranged on the first guide rod and the first screw rod, a winding rod 51 is arranged on the lower surface of the first sliding block 501, in this arrangement, when the cleaning assembly is required to work, the first screw rod 52 is driven to rotate by a first driving motor 520, so that the first sliding block 501 is driven to move along the extending direction of the first guide rod, the winding rod 51 is driven to move along the horizontal direction, meanwhile, the winding rod 51 rotates around the axis of the winding rod, sundries attached to a filter surface can be wound and cleaned during rotation, so that the cleaning purpose is achieved, the number of rotations of the winding rod is controlled to be driven to the other end according to the width of the filter surface, and the cleaning work is completed after the winding rod is driven to the other end by the rotation number of the first driving motor 520.

Further, as a preferred embodiment, referring to fig. 3, 6 and 9, a rack 502 is disposed on the outer casing 2 at a distance parallel to the first guide bar 50, and a gear 510 engaged with the rack 502 is sleeved on the winding bar 51. Specifically, the top of winding pole rotates with flange 51a to be connected, and flange 51a is fixed to be set up in the lower surface of first slider 501, through this kind of setting up mode, in the first slider of drive winding pole 51 motion's in-process, can drive gear 510 through rack 502 and rotate to drive winding pole 51 and rotate around self axis, thereby realize the rotation, through this kind of setting up mode, can simplify the drive structure.

Further, in order to ensure the cleaning effect of the winding rod 51 on the filtering surface, referring to fig. 3, 4 and 6, a plurality of micro winding posts 511 are disposed on the outer circumferential surface of the winding rod 51 at intervals along the axial direction of the winding rod 51, a plurality of micro grooves 31 are disposed on the filtering surface along the horizontal direction, and a plurality of micro grooves 31 are disposed in one-to-one correspondence with a plurality of micro winding posts 510. Specifically, referring to fig. 4, by providing the micro groove 31 on the filtering surface, the end portion of the micro winding column can partially extend into the micro groove 31, by providing the micro groove 31, the spider silk and other impurities can pass through the micro groove after adhering to the filtering surface, by this arrangement, the micro winding column can pick up the impurities adhering to the filtering surface through the micro groove when the winding rod rotates around the axis of the winding rod, so that the impurities adhering to the filtering surface can be cleaned better.

Further, as a preferred embodiment, in some examples, an intermediate gear (not shown in the drawing) is further rotatably disposed on the first slider 501, and the intermediate gear is disposed between the transmission rack and the gear 510, and is driven by the intermediate gear, so that when the first slider drives the winding column to move, the winding column can be rotated towards the moving direction by changing the rotating direction of the winding column through the intermediate gear, and the rotating manner can better clean the sundries attached to the filtering surface, thereby achieving a better cleaning effect.

Example two

The application provides a heat dissipation system for a wireless communication base station, as a specific embodiment, in order to ensure that a winding rod can repeatedly work, a cleaning mechanism capable of automatically cleaning sundries wound on the winding rod is arranged on the winding rod, and further, referring to fig. 9-13, a gear 510 is sleeved outside the winding column 51 in a sliding manner and is in non-rotating fit with the winding column, a limit column 55 is arranged between the winding rod 51 and the gear 510, a cutting edge 5130 is arranged on the lower end face of the gear 510, the limit column 55 is configured to be capable of switching between a state of extending out and retracting into the outer peripheral face of the winding rod 51, a driving column 56 is arranged on the lower end of the winding column, and the driving column 56 is used for driving the gear to move upwards to a position meshed with a rack 502 when the gear is in sliding contact with the driving column 56.

Specifically, through this kind of setting mode, the gear 510 can slide from top to bottom at the outer peripheral face of winding pole, can be with the gear 510 spacing to the position of meshing with rack 502 through spacing post 55, after the winding pole is driven to the other end from the one end of filter through first drive motor 520, first drive motor stops work, spacing post 55 stretches out the state of winding pole 51 outer peripheral face from the tip at this moment and switches to the state that the tip is retracted into the winding pole outer peripheral face, spacing post 55 is not spacing to the gear 510 at this moment, the gear slides down under the effect of gravity, cut the debris that twines on the winding pole through cutting edge 5130, by the gear thrust of gliding after the cutting, thereby realize the self-cleaning to winding pole outside, when the gear whereabouts is in contact with the drive post 56 of below, drive post 56 provides upward thrust to the gear, make the gear upwards slide to the position of meshing with the rack, when clearing up the filter face again, first drive motor reverse rotation, the winding pole reverse motion returns to initial position can, when moving to initial position, the back is repeated this is cleared up to the winding pole, thereby clear up the purpose is reached.

Specifically, referring to fig. 9 to 13, a first receiving chamber 51b is coaxially provided inside the winding rod 51, a cylindrical second receiving chamber 51c communicating with the first receiving chamber is provided at a lower end of the winding rod 51, a cross-sectional area of the second receiving chamber is larger than that of the first receiving chamber, a second piston 51c-1 is slidably provided in the second receiving chamber, an end plug 51c-3 is provided at a port position, a first compression spring 51c-2 is provided between the end plug and the second piston, a hydraulic fluid medium is filled in the first receiving chamber, a second electromagnet (not shown) is provided on the end plug, a second permanent magnet (not shown) of a second electromagnetic ferromagnetic attraction fitting is provided on the second piston, referring to fig. 10, a first piston chamber 551 is provided on a side wall of the winding rod in a radial direction, a bottom of the first piston chamber communicates with the first receiving chamber, a first piston cap 554 is provided at an end of the first piston chamber, the first piston cover is provided with a first ventilation channel 555, a first piston plate 552 is arranged in the first piston cavity, a second pressure spring 553 is arranged between the first piston plate and the bottom of the first piston cavity, a limit post is guided to penetrate through the first piston cover and is connected with the first piston plate, the first piston cover is in an initial state, the second electromagnet is not electrified, at the moment, the second piston 51c-1 is extruded under the action of the elasticity of the first pressure spring, so that certain hydraulic pressure is arranged in the first accommodating cavity, the first piston plate is in a state of abutting with the first piston cover under the action of the elasticity of the second pressure spring, at the moment, the end part of the limit post 555 extends out of the outer circumferential surface of the winding rod to limit the gear 510, when the outside of the winding rod is required to be cleaned, the second electromagnet is electrified, the second piston moves downwards under the action of the magnetic force of the second electromagnet, the first compression spring is compressed, and when the hydraulic pressure in the first accommodating cavity is reduced, so that pressure difference is generated at two sides of the first piston plate 552, when the pressure difference is larger than the elastic force of the second compression spring, the first piston plate drives the limit column 555 to move, so that the gear 510 is released, the gear moves downwards, and the winding rod is cleaned until the winding rod contacts with the driving column 56 below.

Further, referring to fig. 9 and 10, an avoidance groove 510a corresponding to the limit post 56 is formed in the inner circumferential surface of the gear, a unidirectional shovel plate 510b is arranged at the bottom of the avoidance groove, the unidirectional shovel plate is rotatably arranged on the gear through a pin shaft 510b-1, a torsion spring is arranged between the unidirectional shovel plate and the gear, the unidirectional shovel plate can be in a state of shielding the avoidance groove 510a under the elastic force of the torsion spring, and in this way, when the gear is in a position meshed with the rack, the limit post is in an extending state, and at the moment, the limit post contacts the unidirectional shovel plate, and limits the gear through the unidirectional shovel plate; when carrying out the winding pole clearance, the gear moves down and drive post contact, when the drive post 56 drives gear 510, the reverse circular telegram of second electro-magnet or stop circular telegram, thereby the second piston upwards moves when, make spacing post stretch out once more, the gear upwards moves after being driven by the drive post this moment, dodge spacing post 555 through dodging groove 510a, unidirectional shovel board can the rotation down when dodging post 555 contact unidirectional shovel board, thereby make unidirectional shovel board pass through spacing post 555, until the up end of gear collides spacingly with the flange 51a of top, the gear downward movement is spacing to the position with rack meshing again through unidirectional shovel board.

Further, as a preferred embodiment, in order to obtain greater cleaning kinetic energy from the gear, when the gear is in a position engaged with the rack, a first electromagnet 57 is disposed above the gear, and a first permanent magnet 571 magnetically repulsed from the first electromagnet 57 is disposed on the gear. Referring to fig. 9, a first electromagnet 57 is provided in the connection flange 51a, when the winding rod is cleaned, a magnetic force repulsive to the first permanent magnet is generated by energizing the first electromagnet 57, and then energizing the second electromagnet is controlled to enable the limit column 555 to switch the state to release the gear 510, and the gear slides downwards under the action of the magnetic repulsive force and the gravity force, so that the gear obtains larger energy to ensure that sundries wound on the winding rod can be thoroughly cut off through the cutting edge.

Further, as a preferred embodiment, in order to achieve a better cleaning effect, the micro winding column 511 is telescopically matched with the winding rod 51, specifically, referring to fig. 9 and 11, the limit column 555 includes two opposite winding columns, along the axial direction of the winding rod, wherein the micro winding column 511 includes two rows corresponding to the two winding columns, a second piston cavity 5110 communicating with the first accommodating cavity 51b is radially arranged on the side wall of the winding rod, a second piston plate 5111 arranged in the second piston cavity, a second piston cover 5112 arranged at a port of the second piston cavity 5110, a second ventilation channel 5113 is arranged on the second piston cover, the micro winding column 511 is guided on the second piston cover and is connected with the second piston plate, in this way, in an initial state, the second electromagnet is not electrified, the hydraulic flowing medium in the first accommodating chamber is provided with a certain pressure by the elastic force of the first compression spring 51c-2, so that a certain pressure is provided to each of the second piston plates 5111 to push the second piston plates against the second piston cover 5112, so that the micro winding post 511 protrudes out of the outer circumferential surface of the winding rod, when the winding rod is self-cleaned, the second electromagnet is electrified to magnetically attract the second piston 51c-1, so that the second piston moves downward to generate negative pressure in the first accommodating chamber 51b, so that the micro winding post 511 is contracted to a state that the end is lower than the outer circumferential surface of the winding rod 51, therefore, the micro winding post 511 does not block the unidirectional shovel 510b in the process, so that the downward movement of the gear is not blocked, and the cleaning of sundries outside the winding rod is facilitated after the contraction of the micro winding rod, and, because the second compression spring 553 is arranged between the first piston plate 552 and the bottom of the first piston chamber, therefore, the retraction speed of the miniature winding rod is necessarily greater than that of the limit post 55, so that the gear is released after the miniature winding post is retracted, and the reliability is improved.

Further, as a specific embodiment, referring to fig. 12, the gear and the winding rod cooperate in the following manner: the outer peripheral surface of the winding column is provided with strip-shaped grooves 512 on two opposite sides different from the miniature winding column 511, the inner peripheral surface of the gear 510 is provided with a matching key 513 in guiding sliding fit with the strip-shaped grooves 512, the lower end part of the matching key 513 extends out of the range of the gear 510, and the lower end part of the matching key 513 is provided with a cutting blade 5130. Through the cooperation of cooperation key and bar groove to the gear can with winding pole non-normal running sliding fit when, and with cutting edge setting in the lower tip of cooperation key, be favorable to getting rid of the debris cutting of winding on the winding pole.

Further, as a specific embodiment, the bar-shaped groove 512 includes two bar-shaped grooves disposed opposite to each other, and the two matching keys 513 are disposed, referring to fig. 12 and 13, the driving structure of the driving post 56 and the driving manner thereof are as follows: the driving columns 56 are provided with two driving columns, the axis of each driving column 56 is parallel to the axis of the winding rod, each driving column 56 is respectively guided to the lower end face of the corresponding bar-shaped groove 512, a third piston cavity 561 coaxially arranged with the driving column is arranged in the winding rod 511, a third piston plate 562 arranged in the third piston cavity, a third piston cover 564 arranged at the lower end port of the third piston and a third pressure spring 563 arranged between the third piston cover and the third piston plate, the third piston plate abuts against the upper end part of the third piston cavity under the action of the elastic force of the third pressure spring, a first air vent 565 communicated with the atmosphere is arranged at the lower end part of the third piston cavity, a communication air channel 566 is arranged between the upper end part of the third piston cavity and the second accommodating cavity 51c, a first one-way valve 567 is arranged on the communication air channel, the first one-way valve 567 allows air flow to flow into the second accommodating cavity, a through hole 51c-31 communicated with the atmosphere is arranged on the end plug 51c-3, a third one-way valve plate 51c-32 is arranged on the through hole, the third one-way valve plate is arranged under the action of the elastic force of the third pressure spring, the third piston plate is in a state (the third permanent magnet is not shown in the figure), the third piston plate is not shown in the third one-way, and the third valve plate is not shown in the state is opened under the action of the third pressure of the third spring).

Specifically, when the winding rod is self-cleaned, firstly, the first electromagnet is electrified to generate magnetic repulsive force on the first permanent magnet on the gear 510, then the second electromagnet is electrified to generate magnetic attractive force on the second piston 51c-1, so that the second piston 51c-1 moves downwards, gas in the second accommodating cavity is extruded to flow out of the through hole 51c-31, then the miniature winding column and the limiting column shrink in sequence, the gear moves downwards rapidly, sundries are cut through the cutting blade, at the moment, the second electromagnet is kept in an electrified state, the first electromagnet is powered off, then the lower end part of the matching key 513 contacts with the upper end surface of the driving column 56, the driving column is pressed to push the third piston plate 562 to move downwards, the third pressure spring 563 is compressed to buffer the gear, meanwhile, the pressure at the upper end part of the third piston cavity is reduced, the buffer force is provided for the third piston plate, the descending speed of the gear is reduced, then the third electromagnet is controlled to electrify to generate magnetic repulsion force to the third permanent magnet on the third piston plate, the second electromagnet changes electrifying direction to generate magnetic repulsion force to the second permanent magnet, the second piston moves upwards rapidly under the action of the magnetic repulsion force and the elastic force of the first pressure spring 51c-2 to enable the pressure of the hydraulic flowing medium in the first containing cavity to rise, the limit column 55 and the miniature winding column 511 stretch out, and in the process of moving the second piston upwards rapidly, external air flow can flow into the second containing cavity through the third one-way valve plate 51c-32 rapidly, the through hole 51c-31 is closed by the third one-way valve plate under the pushing of the rapid air flow, so that negative pressure is generated in the second containing cavity in the process of moving the second piston upwards, the negative pressure is transferred to the upper part of the third piston cavity through the communicating air passage 567 to enable the air pressure difference on the upper side and the lower side of the third piston plate to become large, thereby provide ascending actuating force to the third piston, the third piston board receives the magnetic repulsion that the third electro-magnet produced simultaneously, promote the quick upward movement of drive post 56 under the effect of dual gravity, thereby promote the gear quick upward movement, dodge groove 510a on the gear can dodge miniature winding post and spacing post, the structure of one-way shovel board 510b can make miniature winding post and spacing post one-way pass when the gear upwards moves, until the gear collides with the flange of top and stops moving, because when gear lower extreme face and spacing post contact, there is certain clearance between the up end of gear and the flange 57, therefore one-way shovel board has left spacing post 55 when gear up end and flange collide, the gear can be spacing by spacing post again when the whereabouts.

Further, after the second electromagnet is reversely electrified and kept for a certain period of time T, the period of time T is selected from 1-3 seconds, the gear is limited again by the limiting post, then the second electromagnet is powered off, the second piston moves downwards by one end distance under the action of negative pressure, so that the negative pressure value in the second accommodating cavity is reduced, the adsorption force to the third one-way valve plate is reduced, the third one-way valve plate is opened downwards, the air pressure in the second accommodating cavity is balanced with the atmosphere, and in the process, the limiting post cannot release the gear under the action of the elastic force of the second pressure spring.

Further, as another realisable way, an electromagnetic valve may be further provided on the through hole 51c-31, and the opening and closing of the through hole may be controlled by the electromagnetic valve to simulate the operation of the third check valve plate, so that the operation purpose may be achieved.

Further, as a preferred embodiment, referring to fig. 3 and 5, a drain outlet 2a is provided between the filter element and the air inlet grille at the lower bottom surface of the outer casing, a second check valve plate 22 allowing airflow to flow out of the outer casing in one direction is provided at the drain outlet, the second check valve plate is in a state of shielding the drain outlet when in a free state, and when the winding rod is self-cleaned, the cooling fan 4 rotates reversely at the same time, so that air passes through the filter element 3 from the direction of the heat exchanger 1 and enters between the filter element 3 and the air inlet grille, at this time, the check valve plate 210 provided at the air inlet grille is in a closed state, the airflow pushes the second check valve plate 22 to flow out, and sundries cleaned and dropped from the winding rod can be discharged from the drain outlet 2a in the process.

Further, as a specific embodiment, in order to facilitate self-cleaning of the winding rod and ensure that the gear will not collide with the filter element when moving up and down, it is preferable, referring to fig. 3, 6 and 7, that two guide elements 53 are arranged in parallel in the outer housing 2 at intervals, each guide element 53 is provided with a sliding element 58 in a guiding sliding manner, a linear driving element 54 is arranged between each sliding element and the outer housing 2, two ends of the first guide rod 50 and the first screw rod 52 are respectively arranged on the two sliding elements 58, and the guiding direction of the guide element 53 is perpendicular to the first guide rod 50, and the linear driving element 54 can drive the sliding element 58 to move in a direction away from the filter element 3. Specifically, the guide member 53 is preferably an airfoil guide rail, the sliding member 58 is a profiled guide groove plate adapted to the airfoil guide rail, the guiding direction of the guide member 53 is horizontal and vertical to the axis of the first screw rod, the linear driving member 54 may be an electric push rod, before the winding rod is self-cleaned, the winding rod is firstly driven to move in a direction away from the filter member by the linear driving member 54, so that a sufficient distance is kept between the winding rod and the filter screen, then the second electromagnet and the first permanent magnet are controlled to be electrified to work for self-cleaning, and after the self-cleaning is completed, the linear driving member 54 is contracted to an initial state, so that the winding rod can work again.

The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (10)

1. A heat dissipation system for a wireless communication base station, comprising:

the heat exchanger (1) is arranged outside the base station machine room;

the heat exchanger comprises an outer shell (2) which is arranged outside the heat exchanger (1), wherein an air inlet grille (21) is arranged on one side wall of the outer shell (2), a filtering piece (3) is arranged between the air inlet grille and the heat exchanger, and a cooling fan (4) is arranged on the other side, opposite to the air inlet grille (21), of the outer shell (2);

the cleaning assembly (5) is arranged in the outer shell (2) and is located between the air inlet grille and the filter element (3), the cleaning assembly (5) comprises a winding rod (51) which is parallel to the filter surface of the filter element (3) and is vertically arranged, and the winding rod (51) is configured to move along the horizontal direction parallel to the filter surface and rotate around the axis of the winding rod in the moving process so as to clean sundries attached to the filter surface in a winding manner.

2. A heat radiation system for a wireless communication base station according to claim 1, wherein the air intake grille (21) is rotatably provided with a check valve plate (210), a torsion spring is provided between the check valve plate (210) and the outer housing, the check valve plate (210) is in a state of closing the air intake grille under the elastic force of the torsion spring, and the check valve plate (210) is configured to allow air flow to flow into the outer housing (2) in one direction.

3. The heat dissipation system for a wireless communication base station according to claim 2, wherein a first guide rod (50) and a first screw rod (52) are horizontally arranged in the outer housing (2), a first sliding block (501) is arranged on the first guide rod (50) in a guiding sliding manner, a first threaded hole matched with the first screw rod (52) is arranged on the first sliding block (501), a first driving motor (520) is connected with the first screw rod in a driving manner, and the winding rod (51) is rotatably arranged on the first sliding block (501).

4. A heat dissipation system for a wireless communication base station according to claim 3, wherein a rack (502) is arranged on the outer casing (2) at a distance parallel to the first guide bar (50), and a gear (510) engaged with and connected with the rack (502) is sleeved on the winding bar (51).

5. The heat dissipation system for a wireless communication base station according to claim 2, wherein a plurality of micro winding posts (511) are provided on an outer circumferential surface of the winding rod (51) at intervals along an axial direction of the winding rod (51), a plurality of micro grooves (31) are provided on the filtering surface along a horizontal direction, and the plurality of micro grooves (31) are provided in one-to-one correspondence with the plurality of micro winding posts (510).

6. The heat dissipation system for a wireless communication base station according to claim 2, wherein the gear (510) is slidably fitted to the outside of the winding post (51) and is non-rotatably fitted with the winding post, a stopper post (55) is provided between the winding post (51) and the gear (510), a lower end surface of the gear (510) is provided with a cutting blade (5130), the stopper post (55) is configured to be switchable between a state of extending and retracting into an outer peripheral surface of the winding post (51), a lower end portion of the winding post is provided with a driving post (56), and the driving post (56) is configured to drive the gear to move upward to a position of meshing with the rack (502) when the gear slidably contacts the driving post (56).

7. The heat dissipation system for a wireless communication base station according to claim 2, wherein a first electromagnet (57) is disposed above the gear when the gear is in a position to mesh with the rack, and a first permanent magnet (571) that is magnetically repulsive to the first electromagnet (57) is disposed on the gear.

8. The heat dissipation system for a wireless communication base station according to claim 6, wherein the miniature winding post (511) is telescopically engaged with the winding rod (51).

9. The heat dissipation system for a wireless communication base station according to claim 6, wherein strip-shaped grooves (512) are provided on opposite sides of the outer peripheral surface of the winding column different from the miniature winding column (511), a fitting key (513) guiding and sliding fit with the strip-shaped groove (512) is provided on the inner peripheral surface of the gear (510), the lower end portion of the fitting key (513) extends out of the range of the gear (510), and the lower end portion of the fitting key (513) is provided with the cutting blade (5130).

10. The heat dissipation system for a wireless communication base station according to claim 6, wherein two guide members (53) are arranged in the outer housing (2) at intervals in parallel, each guide member (53) is provided with a sliding member (58) in a guiding sliding manner, a linear driving member (54) is arranged between each sliding member and the outer housing (2), two ends of the first guide rod (50) and the first screw rod (52) are respectively arranged on the two sliding members (58), the guiding direction of the guide member (53) is perpendicular to the first guide rod (50), and the linear driving member (54) can drive the sliding members (58) to move in a direction away from the filter member (3).