CN113056178A - New trend device and BBU cabinet - Google Patents

New trend device and BBU cabinet Download PDF

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Publication number
CN113056178A
CN113056178A CN202110321446.4A CN202110321446A CN113056178A CN 113056178 A CN113056178 A CN 113056178A CN 202110321446 A CN202110321446 A CN 202110321446A CN 113056178 A CN113056178 A CN 113056178A
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China
Prior art keywords
fan
driving end
fresh air
blade
temperature
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Granted
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CN202110321446.4A
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CN113056178B (en
Inventor
程竑理
王水平
丘岳喜
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Guangdong Haiwu Technology Co Ltd
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Guangdong Haiwu Technology Co Ltd
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136Forced ventilation, e.g. by fans
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20209Thermal management, e.g. fan control

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Ventilation (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a fresh air device and a BBU cabinet, and relates to the technical field of heat dissipation equipment; the fresh air device comprises a plurality of groups of temperature adjusting components and a frame; the blade assembly is rotatably arranged on the frame; a fan assembly is arranged on one side of the frame and comprises a fan circuit and a fan connected into the fan circuit; the fan circuit is provided with a voltage reduction module which is connected with a first circuit breaking part in parallel; the driving end of the rotating device is fixedly connected with a first conduction piece. When adjusting indoor temperature, if the temperature reaches predetermined threshold value, then the rotatory end of the rotary device who corresponds drives the rotatory predetermined opening angle of blade, the blade circulation that makes the air accessible should open, on the other hand drives first switch-on piece rotation according to rotary device's rotatory end, the switching of adjustment first disconnection portion, thereby adjust the voltage that the fan circuit provided the fan, and then the rotational speed of adjustment fan, the input of having reduced complicated control element, can reduce cost, consequently reduce cost when can the various operating modes of accurate processing.

Description

New trend device and BBU cabinet
Technical Field
The invention relates to the technical field of heat dissipation equipment, in particular to a fresh air device and a BBU cabinet.
Background
With the continuous improvement of the state informatization level, various services in the communication industry develop rapidly, and with the rapid expansion of the service volume and the network scale, the promotion of the internet of things, big data and large capacity and the popularization of 4G mobile networks and subsequent 5G mobile networks put forward higher requirements on the heat dissipation capacity of the cabinet machine room of the existing base station. Therefore, when heat exchange equipment is used for cooling, a fresh air system can be introduced for heat dissipation, namely the fresh air system is independently used, or the fresh air system is combined with the heat exchange system, so that the outdoor cabinet is improved and upgraded, and the market potential is huge.
In the fresh air system in the prior art, a temperature sensor is usually adopted to control the rotating speed of a fan, the temperature sensor generates a temperature signal after detecting the indoor temperature, a main control module of the fresh air system analyzes the temperature signal after receiving the temperature signal, then the rotating speed of the fan is adjusted according to the temperature signal, and the fresh air system can accurately process various working conditions by inputting a high-cost main control module; if the rotating speed of the fan is controlled only through the temperature control switch, the fresh air system cannot be matched with various working conditions, and actual requirements are not met. Therefore, it is necessary to develop a new air device that can accurately handle various working conditions and reduce the cost.
Disclosure of Invention
The invention aims to provide a fresh air device and a BBU cabinet, and solves the problems that an existing fresh air system cannot accurately process various working conditions and is low in cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fresh air device comprises a plurality of groups of temperature adjusting components and a frame used for being arranged on a ventilation opening;
the frame is rotatably provided with a blade assembly, and the blade assembly comprises a plurality of blades which are arranged in parallel and can synchronously rotate; the temperature adjusting component is used for detecting the temperature of the current environment and correspondingly adjusting the opening and closing angle of the blade according to the temperature of the current environment;
the temperature adjusting assembly comprises a rotating device, and a driving end of the rotating device is fixedly connected with one end of the blade assembly and is used for driving the blades to rotate to a preset opening and closing angle when the detected temperature reaches a preset temperature threshold value;
a fan assembly is arranged on one side of the frame and comprises a fan circuit and a fan connected into the fan circuit; the fan circuit is provided with a voltage reduction module, and the voltage reduction module is connected with a first circuit breaking part in parallel; the driving end of the rotating device is fixedly connected with a first conduction piece which rotates along with the driving end to conduct the first circuit breaking part.
Optionally, the voltage reducing module is further connected in series with a second circuit breaking portion, and a driving end of the rotating device is fixedly connected with a second conduction piece which rotates along with the driving end to conduct the second circuit breaking portion.
Optionally, the number of the voltage reduction modules is multiple, and the voltage reduction modules are connected in series.
Optionally, the first breaking portion and the second breaking portion are both conductive portions with openings formed therebetween;
the first conduction piece and the second conduction piece comprise insulation parts fixedly connected to the driving end of the rotating device, and one side, far away from the driving end, of each insulation part is provided with a conductor part capable of being embedded in the opening.
Optionally, the first disconnection portion is a first switch, and the second disconnection portion is a second switch connected in series with the voltage reduction module;
the first conduction piece and the second conduction piece comprise shifting parts fixedly connected to a driving end of the rotating device, the shifting parts of the first conduction piece are used for rotating along with the driving end to drive the first switch to be closed, and the shifting parts of the second conduction piece are used for rotating along with the driving end to drive the second switch to be closed.
Optionally, the voltage reduction module includes an adjustment terminal for adjusting voltage reduction, and the driving end of the rotating device is further fixedly connected with an adjustment block for shifting the adjustment terminal.
Optionally, the rotating device is electrically connected with a temperature control switch; the temperature control switch is used for starting the rotating device when the detected temperature reaches a preset temperature threshold value.
Optionally, the rotating device is a motor or a rotating cylinder.
Optionally, a transmission device is connected between the driving end of the rotating device and the blade of the blade assembly, and the transmission device comprises a blade connecting piece and a linkage rod;
the linkage rod is convexly provided with a blade connecting part corresponding to the blade connecting part, and the blade connecting part is rotatably connected with the corresponding blade connecting part;
and the linkage rod is also provided with a rotary connecting part, and the rotary connecting part is connected with the driving end through a connecting rod.
Optionally, the blades correspondingly connected to the same rotating device are arranged at intervals, and a gap for inserting the blades correspondingly connected to the other rotating devices is reserved between every two blades.
A BBU cabinet comprises a ventilation opening and the fresh air device, wherein a frame of the fresh air device is installed on the ventilation opening.
Compared with the prior art, the invention has the following beneficial effects:
according to the fresh air device and the BBU cabinet provided by the invention, when the indoor temperature is regulated, if the temperature reaches the preset threshold value, the rotating end of the corresponding rotating device drives the blades to rotate by the preset opening angle, so that air can circulate through the opened blades, on the other hand, the first conduction piece is driven to rotate according to the rotating end of the rotating device, and the opening and closing of the first circuit breaking part are adjusted, so that the voltage provided by a fan circuit to a fan is adjusted, the rotating speed of the fan is adjusted, the investment of complex control elements is reduced, the cost can be reduced, and the cost can be reduced while various working conditions are accurately treated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.
Fig. 1 is a schematic overall structure diagram of a fresh air device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a fan assembly according to an embodiment of the present invention;
FIG. 3 is a schematic view of the opening and closing principle of the blades provided by the embodiment of the invention;
fig. 4 is a partial enlarged structural view at a in fig. 3.
Illustration of the drawings: 1. a frame; 2. a blade assembly; 3. a rotating device; 31. a temperature control switch; 4. a fan assembly; 41. a fan; 5. a fan circuit; 51. a first circuit breaking section; 52. a second circuit breaking section; 53. a voltage reduction module; 61. a blade attachment; 62. a linkage rod; 621. a blade connecting portion.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Referring to fig. 1 to 4, fig. 1 is a schematic overall structure diagram of a fresh air device according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of a fan assembly according to an embodiment of the present invention, fig. 3 is a schematic structural diagram of an opening and closing principle of a blade according to an embodiment of the present invention, and fig. 4 is a schematic structural diagram of a portion of fig. 3 at a point a in an enlarged manner.
Example one
The fresh air device provided by the embodiment of the invention relates to the technical field of heat dissipation equipment, can accurately process various working conditions, and has the characteristics of low overall cost and high cost performance.
As shown in fig. 1 and 2, the fresh air device includes a plurality of temperature control assemblies and a frame 1 for mounting on the vent.
A blade assembly 2 is rotatably arranged on the frame 1, and the blade assembly 2 comprises a plurality of blades which are arranged in parallel and can synchronously rotate; the temperature adjusting component is used for detecting the temperature of the current environment and correspondingly adjusting the opening and closing angle of the blade according to the temperature of the current environment.
The temperature adjusting assembly comprises a rotating device 3, wherein the driving end of the rotating device 3 is fixedly connected with one end of a blade assembly 2 and used for driving the blade to rotate to a preset opening and closing angle when the detected temperature reaches a preset temperature threshold value.
A fan assembly 4 is arranged on one side of the frame 1, and the fan assembly 4 comprises a fan circuit 5 and a fan 41 connected to the fan circuit 5; the fan circuit 5 is provided with a voltage reduction module 53, and the voltage reduction module 53 is connected with a first circuit breaking part 51 in parallel; a first conduction member for rotating with the driving end to conduct the first breaking portion 51 is fixedly connected to the driving end of the rotating device 3.
Specifically, when the indoor temperature is adjusted, if the temperature reaches a preset threshold value, the rotating end of the corresponding rotating device 3 drives the blade to rotate by a preset opening angle, so that air can circulate through the opened blade, and on the other hand, the rotating end of the rotating device 3 drives the first conduction piece to rotate, so as to adjust the opening and closing of the first circuit breaking part 51, thereby adjusting the voltage supplied to the fan 41 by the fan circuit 5, further adjusting the rotating speed of the fan 41, reducing the input of complex control elements, reducing the cost, and therefore, reducing the cost while accurately processing various working conditions.
Further, as shown in fig. 2, the voltage reducing module 53 is further connected in series with a second circuit breaking portion 52, and the driving end of the rotating device 3 is fixedly connected with a second conducting member for rotating with the driving end to conduct the second circuit breaking portion 52. The second cut-off portion 52 is arranged to preset a starting temperature of the fan 41, when the environment is lower than the starting temperature, the fan 41 does not work, and once the environment is higher than the starting temperature, the driving end of the rotating device 3 drives the second conduction member to rotate, so that the second cut-off portion 52 is conducted, and the power supply supplies power to the fan 41.
In a specific embodiment, the number of the voltage-reducing modules 53 is plural, and the voltage-reducing modules 53 are connected in series. Wherein, every voltage reduction module 53 corresponds a first circuit-breaking portion 51 alone, and every circuit-breaking portion 51 corresponds a first piece that switches on of rotary device 3 for the new trend device can be the speed governing step by step through the setting of a plurality of voltage reduction modules 53. It should be added that the voltage dropping module 53 may be a voltage dropping resistor, a voltage dropping module, and the like, and has the advantages of low control cost, high cost performance, and the like.
In a specific embodiment, the first and second disconnection portions 51 and 52 are each a conductive portion having an opening formed therebetween. For example, the conductive portion is solder provided on the PCB, and an opening is formed in the solder, and when the opening is connected by a conductor, the circuit is electrically connected thereto.
The first conduction piece and the second conduction piece comprise insulation parts fixedly connected to the driving end of the rotating device 3, and one side, away from the driving end, of each insulation part is provided with a conductor part capable of being embedded in the opening.
In another specific embodiment, the first breaker 51 is a first switch, and the second breaker 52 is a second switch connected in series with the voltage-decreasing module 53. The first switch and the second switch can be a key switch, a single-pole single-throw switch, a slide rheostat, etc.
First switch on piece and second switch on piece all include the toggle portion of fixed connection on rotary device 3's drive end, and the toggle portion of first switch on piece is used for rotating with the drive end in order to drive first switch closure, and the toggle portion of second switch on piece is used for rotating with the drive end in order to drive the second switch closure.
Further, the voltage reducing module 53 includes an adjusting terminal for adjusting the voltage drop, and the driving end of the rotating device 3 is further fixedly connected with an adjusting block for shifting the adjusting terminal. Illustratively, when the driving end of the rotating device 3 rotates, the adjusting terminal can be driven to rotate, so as to adjust the voltage drop of the voltage drop module 53, further realize the stepless adjustment of the rotating speed of the fan 41, and make the fresh air device have the advantages of smooth transition and high stability in the speed adjusting process. It needs to supplement that, the regulating block stirs the regulation terminal and does not limit, both can set up transmission parts such as gear, connecting rod between regulating block and regulation terminal, on transmitting rotary device 3's effort to the regulation terminal, also can directly stir the regulation terminal with the regulating block extension.
Specifically, the rotating device 3 is electrically connected with a temperature control switch 31; the temperature control switch 31 is used to activate the rotating means 3 when the detected temperature reaches a preset temperature threshold. As shown in fig. 1, each rotating device 3 may correspond to one temperature control switch 31, or only one temperature control switch 31 may be provided, and the electric control box sends an action sequence signal to the rotating device 3 according to a temperature value signal returned by the temperature control switch 31.
It should be noted that if the temperature control switch is used to directly control both the rotation device circuit and the fan circuit 5, the overall control accuracy of the fresh air device will be affected by the different supply voltages and loads of the access circuit of the rotation device 3 and the fan circuit 5, so that the overall control accuracy of the fresh air device can be ensured in a low-cost manner through the first conduction member and the first disconnection portion 51, and various working conditions can be matched.
Specifically, the rotating device 3 is a motor or a rotary cylinder.
Further, as shown in fig. 3 and 4, a transmission device is connected between the driving end of the rotating device 3 and the blade of the blade assembly 2, and the transmission device comprises a blade connector 61 and a linkage rod 62.
The blade connecting piece 61 is fixedly connected to the blade, the linkage rod 62 is convexly provided with a blade connecting part 621 corresponding to the blade connecting piece 61, and the blade connecting part 621 is rotatably connected with the corresponding blade connecting piece 61.
The linkage rod 62 is further provided with a rotary connecting part, and the rotary connecting part is connected with the driving end through a connecting rod. The adjustment of the blades does not need the input of an angle adjusting actuator, an angle switch, a control main board and other elements, and the blade has the advantage of low cost.
Furthermore, the blades correspondingly connected with the same rotating device 3 are arranged at intervals, and gaps for inserting the blades correspondingly connected with other rotating devices 3 are reserved between every two blades.
Next, the following description is given with reference to specific operating modes of the fresh air device: presetting three temperature thresholds which are respectively 30 degrees (+ -4 degrees), 45 degrees (+ -4 degrees) and 55 degrees (+ -4 degrees); when the temperature is higher than 30 °, only one of the rotating devices 3 is activated, which opens the 1/3 blade of the blade assembly 2, and the second cut-off portion 52 is closed, and the voltage drop modules 53 are all connected in series in the circuit, and the fan 41 operates at the minimum rotation speed. When the temperature is higher than 45 deg., the other rotary device 3 is activated, the other 1/3 vanes of the starting vane assembly 2 are opened (total 2/3 vanes are opened), one of the first cut-out portions 51 is closed, one of the pressure drop modules 53 is short-circuited, and the fan 41 is operated at a faster speed. When the temperature is higher than 55 deg., the last rotating device 3 is started, the last 1/3 blade of the driving blade assembly 2 is opened (at this time, the blades are all opened), the power supply directly supplies power to the fan 41, and the fan 41 rotates at the maximum rotating speed.
Example two
Other modes of the new air device exist, such as presetting three temperature thresholds, namely 30 degrees (+ -4 degrees), 45 degrees (+ -4 degrees) and 55 degrees (+ -4 degrees); when the temperature is higher than 30 °, only one of the rotating devices 3 is activated to drive the 1/3 blade of the blade assembly 2 to open, and one of the first circuit breaking portions 51 is closed, at this time, the second circuit breaking portion 52 is still in an open state, the fan circuit 5 is not turned on, and the fan 41 does not operate and rotate. When the temperature is higher than 45 °, the other rotary device 3 is activated, the other 1/3 vanes of the starting vane assembly 2 are opened (total 2/3 vanes are opened), the second cut-off 52 is closed, one of the voltage drop modules 53 is short-circuited, and the fan 41 operates at a faster speed. When the temperature is higher than 55 deg., the last rotating means 3 is activated, the last 1/3 blade of the driving blade assembly 2 is opened (at this time, the blades are all opened), and the other first cut-off portion 51 is closed, the power supply directly supplies power to the fan 41, and the fan 41 is rotated at the maximum rotation speed. Therefore, when the temperature is lower, only the blades are opened for ventilation, and the fan does not rotate, so that the effect of saving energy is achieved.
It should be understood that the number of the rotating devices 3 is not limited, and as the number of the temperature control components increases, the more the fresh air device has the gears. Meanwhile, when the rotation device 3 is enabled to adjust the pressure drop of the pressure drop module 53, the fan 41 of the fresh air device can have the function of stepless speed change only by adjusting the rotation angle of the rotation device 3, so that the strain capacity of the fresh air device is greatly improved.
In conclusion, the new trend device that this embodiment provided can realize the ability of coping with complicated operating mode with the structure of low cost to have advantages such as stability height, control convenience, precision height.
EXAMPLE III
This embodiment provides a BBU cabinet, including the vent and as in embodiment one or embodiment two fresh air device, the frame 1 of fresh air device is installed on the vent. Wherein, the vent can be seted up in the arbitrary department on the cabinet wall of BBU cabinet, can play the effect with the outside air circulation of cabinet. The first and second embodiments describe specific structures and technical effects of the fresh air device, and the BBU cabinet of the present embodiment incorporates the device, and also has the technical effects.
To sum up, the BBU cabinet of this embodiment has the effect of coping with complicated operating mode with low costs to have advantages such as the heat dissipation is good, stability is high, control is convenient, the precision is high.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A fresh air device is characterized by comprising a plurality of groups of temperature adjusting components and a frame (1) used for being installed on a ventilation opening;
the blade assembly (2) is rotatably arranged on the frame (1), and the blade assembly (2) comprises a plurality of blades which are arranged in parallel and can synchronously rotate; the temperature adjusting component is used for detecting the temperature of the current environment and correspondingly adjusting the opening and closing angle of the blade according to the temperature of the current environment;
the temperature adjusting assembly comprises a rotating device (3), wherein the driving end of the rotating device (3) is fixedly connected with one end of the blade assembly (2) and is used for driving the blades to rotate to a preset opening and closing angle when the detected temperature reaches a preset temperature threshold value;
a fan assembly (4) is arranged on one side of the frame (1), and the fan assembly (4) comprises a fan circuit (5) and a fan (41) connected into the fan circuit (5); a voltage reduction module (53) is arranged in the fan circuit (5), and the voltage reduction module (53) is connected with a first circuit breaking part (51) in parallel; the driving end of the rotating device (3) is fixedly connected with a first conduction piece which rotates along with the driving end to conduct the first circuit breaking part (51).
2. The fresh air device according to claim 1, wherein the voltage reduction module (53) is further connected in series with a second circuit breaking portion (52), and a driving end of the rotating device (3) is fixedly connected with a second conduction member for rotating along with the driving end to conduct the second circuit breaking portion (52).
3. The fresh air device as claimed in claim 2, wherein the number of the voltage reduction modules (53) is multiple, and the voltage reduction modules (53) are connected in series with each other.
4. The fresh air device according to claim 2, wherein the first cut-out portion (51) and the second cut-out portion (52) are each a conductive portion having an opening formed therebetween;
the first conduction piece and the second conduction piece respectively comprise an insulation part fixedly connected to the driving end of the rotating device (3), and one side, far away from the driving end, of the insulation part is provided with a conductor part capable of being embedded in the opening.
5. The fresh air device according to claim 2, characterized in that the first circuit breaking portion (51) is a first switch, and the second circuit breaking portion (52) is a second switch connected in series with the voltage reducing module (53);
the first conduction piece and the second conduction piece respectively comprise a poking part fixedly connected to a driving end of the rotating device (3), the poking part of the first conduction piece is used for rotating along with the driving end to drive the first switch to be closed, and the poking part of the second conduction piece is used for rotating along with the driving end to drive the second switch to be closed.
6. The fresh air device according to claim 1, wherein the voltage reduction module (53) comprises an adjusting terminal for adjusting voltage reduction, and an adjusting block for shifting the adjusting terminal is fixedly connected to the driving end of the rotating device (3).
7. The new wind device according to claim 1, characterized in that the rotating device (3) is electrically connected with a temperature control switch (31); the temperature control switch (31) is used for starting the rotating device (3) when the detected temperature reaches a preset temperature threshold value.
8. The fresh air device according to claim 1, characterized in that the rotating device (3) is a motor or a rotating cylinder.
9. The fresh air device according to claim 1, characterized in that a transmission device is connected between the driving end of the rotating device (3) and the blade of the blade assembly (2), and comprises a blade connecting piece (61) and a linkage rod (62);
the blade connecting pieces (61) are fixedly connected to the blades, the linkage rods (62) are convexly provided with blade connecting parts (621) corresponding to the blade connecting pieces (61), and the blade connecting parts (621) are rotatably connected with the corresponding blade connecting pieces (61);
and a rotary connecting part is further arranged on the linkage rod (62), and the rotary connecting part is connected with the driving end through a connecting rod.
10. A BBU cabinet, comprising ventilation openings and a fresh air device according to any of claims 1-9, the frame (1) of the fresh air device being mounted on the ventilation openings.
CN202110321446.4A 2021-03-25 2021-03-25 Fresh air device and BBU cabinet Active CN113056178B (en)

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CN113056178B CN113056178B (en) 2023-11-24

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