A power distribution box with intelligent noise reduction function

Abstract

This invention relates to the field of electrical equipment technology, and more particularly to a distribution box with intelligent noise reduction function. It includes a distribution box body, with active cooling fans integrated on both its left and right side walls to create a basic forced convection airflow field; it also includes two temperature sensing probes, respectively installed on the left and right walls of the distribution box body, for real-time monitoring of the internal heat load; precision drive modules installed on the exterior of the left and right sides of the distribution box body; and four vertical sliding push plates, each connected to the output end of a precision drive module on the same side. This distribution box intelligently monitors the heat load through temperature sensing probes and automatically drives the baffle assembly to switch between an "acoustic labyrinth" and a "straight ventilation duct." At low temperatures, it forms a tortuous channel, utilizing a sound-absorbing liner for efficient noise reduction; at high temperatures, it flattens the airflow duct, significantly improving the heat dissipation rate, achieving a dynamic balance between noise reduction and heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and in particular to a distribution box with intelligent noise reduction function. Background Technology

[0002] As a key piece of equipment at the end of the smart grid, the internal components of the distribution box continuously generate heat during operation. A reasonable ventilation and heat dissipation structure is the foundation for ensuring its safe and stable operation. Traditional distribution boxes mostly use fixed louvers or forced fans for heat dissipation: fixed louvers cannot adjust the airflow and have low heat dissipation efficiency; while normally open fans can dissipate heat quickly, they bring continuous high noise and high energy consumption problems, and are also prone to dust inhalation, reducing the equipment's protection level.

[0003] To address these issues, adjustable airflow deflector structures have emerged in existing technologies. For example, some patents propose using manually or motor-driven louvers to change airflow direction, balancing ventilation and dust prevention needs. However, such designs typically only offer a single adjustment function, lacking real-time response to changes in cabinet temperature and the ability to dynamically switch between "low-noise insulation" and "efficient heat dissipation," making it difficult to meet the requirements of intelligent thermal management under complex operating conditions. In recent years, some solutions have attempted to introduce temperature sensors to link fan start / stop for basic temperature control. However, this method only controls airflow volume without optimizing the airflow path; high-speed airflow directly impacting components can easily generate eddy current noise, and prolonged fan start / stop cycles shorten the fan's lifespan. Furthermore, if the fan fails, the system loses its active heat dissipation capability, resulting in insufficient reliability. More importantly, existing technologies lack integrated intelligent ventilation devices that coordinate the control of adjustable deflector ducts and auxiliary air inlets, achieving a closed-loop logic of "high-temperature triggering—heat dissipation enhancement—temperature stabilization—automatic reset."

[0004] Therefore, there is an urgent need for a compact, intelligent, and efficient power distribution box ventilation device that can autonomously switch working modes under different heat loads. This device can ensure quiet operation and protection during normal operation, rapidly enhance heat dissipation during abnormal temperature rises, and automatically return to energy-saving mode after the temperature recovers, thereby comprehensively improving the environmental adaptability and operational reliability of power distribution equipment. Summary of the Invention

[0005] In order to overcome the shortcomings of existing distribution box ventilation devices, which cannot simultaneously achieve a dynamic balance between heat dissipation efficiency, noise control and intelligent response, and have unreasonable airflow paths and poor reliability, this invention provides a distribution box with intelligent noise reduction function.

[0006] A power distribution box with intelligent noise reduction function includes a power distribution box body, on which active cooling fans are integrated on both the left and right side walls to create a basic forced convection airflow field; it also includes: two temperature sensing probes, respectively installed on the left and right side walls of the power distribution box body, for real-time monitoring of the heat load inside the box; precision drive modules, installed on the left and right sides of the power distribution box body; four vertical sliding push plates, each connected to the output end of a precision drive module on the same side, and driven by the module to perform vertical lifting and lowering movements; and variable cross-section deflector noise reduction components, installed on the left and right sides of the power distribution box body, each connected to two vertical sliding push plates on the same side; each temperature sensing probe is electrically connected to the precision drive module on the same side through a control module, and controls the precision drive module to move according to the monitored temperature signal, driving the vertical sliding push plates to rise and fall, thereby causing the variable cross-section deflector noise reduction components to switch between an initial noise reduction state and a strong heat dissipation state.

[0007] Furthermore, the variable cross-section deflector noise reduction component includes: two mounting frames, which are fixed to the left and right sides of the distribution box body respectively, serving as a load-bearing skeleton; seven fixed limiting guide rail groups, which are uniformly fixed to the inner walls of the front and rear sides of each mounting frame in the vertical direction; a dynamic pushing guide rail group, which is fixed to the inner side of each vertical sliding push plate in the vertical direction and corresponds one-to-one with the fixed limiting guide rail group; three driven support sliders, which are horizontally slidably embedded in each fixed limiting guide rail group; two active drive sliders, which are horizontally slidably embedded in each dynamic pushing guide rail group; a main deflector plate and an auxiliary deflector plate, which are alternately hinged to form an adaptive waveform deflector array and hinged between the active drive slider and the driven support slider at the same level; and a porous sound-absorbing liner, which is applied to the surface of the main deflector plate and the auxiliary deflector plate.

[0008] Furthermore, in the initial static state, the dynamic push guide rail group of the same level has a preset vertical height offset relative to the fixed limit guide rail group, and the offset of each level is consistent.

[0009] Furthermore, the hinged connection sequence of the main baffle and the auxiliary baffle forms a double "M"-shaped sawtooth-like stacked structure. When the vertical sliding pusher is in a high position, the active drive slider is lifted, pulling the main baffle and the auxiliary baffle together to form a narrow and tortuous high-impedance acoustic labyrinth, which is the initial noise reduction state. When the vertical sliding pusher moves downward, the active drive slider is pressed down, forcing the driven support slider to expand horizontally to both sides. The main baffle and the auxiliary baffle are stretched and flattened to form a low-resistance straight ventilation channel, which is the strong heat dissipation state.

[0010] Furthermore, the precision drive module includes: two dual-axis servo motors, each mounted on the lower part of the mounting frame; four eccentric cam push rods, each fixed to the symmetrical output shaft of the dual-axis servo motor on the same side via a coupling; and rectangular guide grooves opened on the lower part of each vertical sliding push plate, with the drive protrusions on the eccentric cam push rods on the same side embedded in the corresponding rectangular guide grooves.

[0011] Furthermore, it also includes a top-mounted follow-up extension silencing module located in the topmost space of each mounting frame cavity, which includes: two guide fairings, each in the form of an inverted U-shaped hollow cavity, the top of which is rotatably hinged to the inner side of the top wall of the mounting frame on the same side via a pivot pin; and two telescopic sound-absorbing tongues, which are slidably embedded in the guide fairing cavity on the same side along the longitudinal direction, with their lower ends extending out of the bottom of the guide fairing and rotatably connected to the top of the uppermost main deflector plate on the same side via a single-degree-of-freedom hinge.

[0012] Furthermore, the hinge between the guide fairing and the mounting frame is fitted with an elastic reset component, enabling it to make slight angle deflections and adaptive floating adjustments.

[0013] Furthermore, emergency heat dissipation windows are provided on the left and right walls of the distribution box body. Emergency ventilation and noise reduction units are provided on the outer side of both windows. Each unit includes: two noise reduction frames, which are fixed to the left and right walls of the distribution box body and cover the corresponding emergency heat dissipation windows. The frames have wave-shaped labyrinthine noise reduction channels inside; two linkage opening and closing baffles, which are rotatably connected to the outer side of each noise reduction frame; four horizontal rotating rods, which are fixed to the front and rear ends of the upper part of each linkage opening and closing baffle in pairs; four transmission connecting rods, the upper end of each of which is rotatably hinged to the upper end of the horizontal rotating rod on the same side; and four sliding sleeves, which are rotatably connected to the upper part of each vertical sliding push plate. The sleeves have movable cavities inside, and the lower part of the transmission connecting rod on the same side extends into the movable cavity through the top opening of the corresponding sliding sleeve.

[0014] Furthermore, each transmission link has an inverted T-shaped limiting boss machined at its lower part, which is located in the corresponding movable cavity. In the initial static state, the inverted T-shaped limiting boss rests on the inner bottom surface of the movable cavity, with a preset gap ΔH reserved between its top surface and the inner top surface of the movable cavity. When the vertical sliding push plate moves downward by ΔH, the inner top surface of the movable cavity abuts against the top surface of the inverted T-shaped limiting boss, forcibly driving the transmission link to move downward, thereby driving the linkage opening and closing baffle to flip outward and open.

[0015] Furthermore, it also includes: two heat sinks, each fixed to the top of the mounting frame; two sets of heat pipes, each located inside the mounting frame on the same side and connected to the heat sink on the same side; and two primary dust filters, each embedded in a rectangular mounting groove on the outside of the mounting frame.

[0016] The present invention has the following advantages: This distribution box monitors the heat load inside the box in real time through a temperature sensing probe, and automatically controls the precision drive module according to a preset threshold to drive the vertical sliding push plate to rise and fall, thereby driving the variable cross-section deflector noise reduction component to intelligently switch between two modes: "high impedance acoustic wave maze" and "low impedance straight ventilation duct"; at low temperatures, it forms a narrow and tortuous wave-shaped channel, and fully absorbs fan noise using a porous sound-absorbing liner; at high temperatures, it automatically flattens the air duct, greatly improving the air exchange rate and achieving a dynamic balance between noise reduction and heat dissipation.

[0017] This invention employs a double "M"-shaped sawtooth-like stacked structure formed by alternating hinges of the main baffle and the auxiliary baffle. Through the linkage between the active driving slider and the driven support slider, the slope of the baffle changes smoothly with the rise and fall of the push plate. At the high position, the peaks are steep and the troughs are tight, forming a highly efficient acoustic labyrinth. At the low position, it is stretched laterally and flattened longitudinally, forming a low-resistance channel. At the same time, the telescopic sound-absorbing tongue in the top follow-up extension silencing module extends and retracts in conjunction with the main baffle, filling the top gap after the air duct is flattened, and realizing closed-loop noise control under all operating conditions.

[0018] Under extreme high-temperature conditions, the vertical sliding push plate continues to descend to its limit position. Through the clearance between the sliding sleeve and the transmission linkage, the linkage opening and closing baffle is forcibly opened, allowing the emergency heat dissipation window to open. The hot air inside the chamber is quickly discharged through the labyrinthine silencer flow channel, forming a chimney effect convection. This process requires no additional power supply or sensor intervention, ensuring the reliability of heat dissipation under extreme conditions. At the same time, the heat pipe conducts heat to the heat dissipation frame for auxiliary heat dissipation, and the primary dust filter effectively blocks dust, comprehensively improving the environmental adaptability and operational stability of the equipment. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the components of the present invention, including the mounting frame, heat sink, and primary dust filter.

[0021] Figure 3 This is a three-dimensional structural diagram of the components of the present invention, including the dual-axis servo motor, the eccentric cam push rod, and the vertical sliding push plate.

[0022] Figure 4 This is a three-dimensional structural diagram of the components of the present invention, including the dynamically driven guide rail assembly, the actively driven slider, and the main deflector plate.

[0023] Figure 5 This is a three-dimensional structural diagram of the vertical sliding push plate, the dynamic pushing guide rail assembly, and the driven support slider of the present invention.

[0024] Figure 6 This is a three-dimensional structural diagram of the main baffle, auxiliary baffle, and active drive slider components of the present invention.

[0025] Figure 7 This is a three-dimensional structural diagram of the components of the present invention, including the mounting frame, guide shroud, and telescopic sound-absorbing tongue.

[0026] Figure 8 This is a three-dimensional structural cross-sectional view of the guide shield and telescopic sound-absorbing tongue of the present invention.

[0027] Figure 9 This is a three-dimensional structural diagram of the noise reduction outer frame, the linkage opening and closing baffle, and the vertical sliding push plate of the present invention.

[0028] Figure 10 This is a three-dimensional structural cross-sectional view of the noise reduction outer frame and the linkage opening and closing baffle of the present invention.

[0029] Figure 11 This is a three-dimensional structural diagram of the horizontal rotating rod, transmission connecting rod, and sliding sleeve of the present invention.

[0030] Figure 12 This is a three-dimensional structural diagram of the power distribution box body, heat sink, and heat pipes of the present invention.

[0031] Component names and serial numbers in the diagram: 101_Distribution box body, 1011_Active cooling fan, 1012_Emergency cooling window, 102_Mounting frame, 1021_Fixed limit guide rail assembly, 103_Dual-axis servo motor, 104_Eccentric cam push rod, 105_Vertical sliding push plate, 106_Dynamic push guide rail assembly, 107_Main baffle plate, 1071_Auxiliary baffle plate, 108_Active drive slider, 1081 _Driven support slider, 109_Porous sound-absorbing liner, 110_Temperature sensor probe, 201_Guide shroud, 202_Telescopic sound-absorbing tongue, 301_Noise-reducing frame, 3011_Labyrinth-type silencer channel, 302_Linked opening and closing baffle, 303_Horizontal rotating rod, 304_Sliding sleeve, 305_Transmission connecting rod, 306_Moving cavity, 401_Heat sink, 402_Heat pipe, 403_Primary dust filter. Detailed Implementation

[0032] The present invention will be further described below with reference to specific embodiments. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0033] Example 1: A distribution box with intelligent noise reduction function, such as Figures 1-6 As shown, the distribution box body 101 is equipped with active cooling fans 1011 integrated on both its left and right side walls to construct a basic forced convection airflow field. Emergency heat dissipation windows 1012 are also provided on both the left and right sides of the distribution box body 101 and directly above the cooling fans to serve as auxiliary heat dissipation channels under high-temperature conditions. Mounting frames 102 are fixed to the exterior of both the left and right sides of the distribution box body 101 to serve as the supporting skeleton for the airflow regulation and noise reduction modules.

[0034] Each mounting frame 102 is constructed as a hollow frame structure, with multiple sets of fixed limiting guide rails 1021 uniformly fixed in the vertical direction on the inner walls of its front and rear sides. In this embodiment, there are seven sets, defined as the 1st to 7th levels from bottom to top. Vertical sliding push plates 105 are slidably connected to the interior of the front and rear sides of each mounting frame 102 in the vertical direction. Corresponding to the fixed limiting guide rails 1021, a corresponding dynamic pushing guide rail group 106 is fixedly fixed in the vertical direction on the inner surface of each vertical sliding push plate 105.

[0035] In the initial static state, the dynamic push guide rail group 106 of the same level has a preset vertical height offset relative to the fixed limit guide rail group 1021. That is, the reference plane of the Nth layer push guide rail is higher than the reference plane of the Nth layer limit guide rail, and the offset of each level remains strictly consistent, forming a uniform initial prestress spacing. This layout provides a precise motion stroke basis for the smooth transformation of the subsequent air duct shape, ensuring the synchronization of the multi-level linkage movement.

[0036] Each fixed limit guide rail group 1021 has three driven support sliders 1081 horizontally slidably embedded in it; each dynamic push guide rail group 106 has two active drive sliders 108 horizontally slidably embedded in it. These two types of sliders together constitute the dynamic motion node of the variable cross-section deflector noise reduction component.

[0037] An adaptive waveform deflector array is hinged between the active drive slider 108 and the driven support slider 1081 at the same level. This array is formed by alternating hinges of the main deflector plate 107 and the auxiliary deflector plate 1071, and both of their surfaces are covered with a porous sound-absorbing liner 109.

[0038] The variable cross-section deflector noise reduction assembly is installed in each level of the mounting frame 102. In a single level, the assembly consists of two sets of actively driven sliders 108 and three sets of driven support sliders 1081 as motion nodes, which are connected in series by hinges through the main deflector plate 107 and the auxiliary deflector plate 1071.

[0039] Node distribution: Along the width of the airflow channel, five sliders are arranged alternately. There are three driven support sliders 1081 distributed on both sides and in the middle, located on the outer, middle and inner sides respectively. They are constrained within the fixed fixed limit guide rail group 1021 and can only slide horizontally back and forth. Above the gap between the two driven sliders, there are two active drive sliders 108 suspended. They are slidably connected to the vertically movable dynamic push guide rail group 106 in the horizontal direction and only move vertically up and down with the vertical sliding push plate 105.

[0040] The main baffle 107 and the auxiliary baffle 1071 are hinged end-to-end by pins to form a continuous M-shaped linkage chain. The specific connection sequence is as follows (taking the left mounting frame 102 as an example, from left to right): First connection point (lower left): The lower end of the first main deflector plate 107 is hinged to the inner side of the outer driven support slider 1081.

[0041] Second connection point (upper left): The upper end of the main baffle 107 is hinged to the inside of the left active drive slider 108.

[0042] The third connection point (upper middle): the other side inside the left active drive slider 108, which is also hinged to the upper end of the first auxiliary baffle 1071.

[0043] Fourth connection point (lower middle): The lower end of the auxiliary baffle 1071 is hinged to the interior of the middle driven support slider 1081.

[0044] Fifth connection point (middle and lower reuse): On the other side of the interior of the middle driven support slider 1081, the lower end of the second main baffle 107 is continued to be hinged.

[0045] Sixth connection point (upper right): The upper end of the main baffle 107 is hinged to the inside of the right active drive slider 108.

[0046] The seventh connection point (bottom right): on the other side inside the right active drive slider 108, hinged to the upper end of the second auxiliary baffle 1071.

[0047] Eighth connection point (lower right end point): The lower end of the auxiliary baffle 1071 is finally hinged to the interior of the inner driven support slider 1081.

[0048] The aforementioned linkage mechanism naturally forms a double "M"-shaped sawtooth-like overlapping structure in space.

[0049] In the initial noise reduction state, when the vertical sliding push plate 105 is in a high position, the active drive slider 108 is lifted, pulling the connecting chain upwards. At this time, the "M"-shaped wave crest is steep and the wave trough is tight, and the angle between the baffle plate and the horizontal plane is large, forming a narrow and tortuous high-impedance acoustic wave labyrinth.

[0050] In the high-heat dissipation state, when the vertical sliding push plate 105 descends, the active drive slider 108 is pressed down. Because the driven support slider 1081 is constrained by the fixed limit guide rail assembly 1021 and cannot move downwards, it is forced to slide horizontally outwards to both sides. This action forces the "M"-shaped structure to be stretched laterally and flattened longitudinally, causing the baffle plate to tend towards a horizontally flattened shape. At this time, the height difference between the crests and troughs is minimal, and the spacing between adjacent plates is maximized, forming a low-resistance direct ventilation channel. After the temperature drops back to the threshold, the system automatically resets and switches back to the low-noise energy-saving mode.

[0051] like Figure 3 As shown, specifically, each mounting frame 102 has a precision drive module integrated at its lower part, which includes a dual-axis servo motor 103 installed at the lower part of each mounting frame 102. Each of the symmetrical output shafts is fixed with an eccentric cam push rod 104 through a coupling. Each vertical sliding push plate 105 has a rectangular guide groove at its lower part. The drive protrusion on each eccentric cam push rod 104 is embedded in the rectangular guide groove at the bottom of the corresponding vertical sliding push plate 105, converting the rotational motion of the motor into the precise linear displacement of the push plate.

[0052] like Figure 1 As shown, specifically, temperature sensing probes 110 are installed on both the left and right walls of the distribution box body 101 to monitor the heat load inside the box in real time; each temperature sensing probe 110 is electrically connected to the nearby dual-axis servo motor 103 through a control module.

[0053] like Figure 7 and Figure 8 As shown, to compensate for noise reduction losses in high-throughput mode, a top-mounted, dynamically extending sound-absorbing module is provided in the topmost space of the inner cavity of each mounting frame 102, aiming to dynamically compensate for top sound leakage after the main air duct is flattened. This includes a guide shroud 201 and a telescopic sound-absorbing tongue 202.

[0054] Each guide vane 201 has an inverted U-shaped hollow cavity. Its top is rotatably hinged to the inner side of the top wall of each mounting frame 102 through a pivot pin. It is limited by an elastic reset component (such as a torsion spring or tension spring, which is built-in and not shown), so that it can both deflect slightly around the pivot pin and make adaptive floating adjustments with the movement of the internal components.

[0055] The telescopic sound-absorbing tongue 202 is a plate-shaped component with a porous sound-absorbing material on its surface, which is slidably embedded in the cavity of each guide shroud 201 along the longitudinal direction. The lower end of each telescopic sound-absorbing tongue 202 extends out of the bottom of the guide shroud and is directly rotatably connected to the top of the main baffle 107 of the uppermost level (i.e., the 7th level) through a single-degree-of-freedom hinge.

[0056] When the system is in high-impedance noise reduction mode, the vertical sliding push plate 105 is in a high position, causing the uppermost main baffle plate 107 to be in a retracted state. At this time, the telescopic sound-absorbing tongue 202 hinged to its upper part is completely pushed into the inner cavity of the guide shroud 201. The guide shroud 201 remains inclined under the action of gravity, and its lower end face is tightly attached to the upper part of the main baffle plate 107, forming a top acoustic sealing zone, forcing all airflow into the main air duct labyrinth, and eliminating direct noise transmission from the top.

[0057] When the system switches to low-resistance, high-throughput cooling mode, the vertical sliding push plate 105 descends, pulling the uppermost main baffle 107 downwards significantly. The downward movement of the main baffle 107 pulls the telescopic sound-absorbing tongue 202 downwards through the upper hinge point, causing it to extend synchronously from within the guide shroud 201. Due to the increased extension length of the tongue and the impact of airflow, the guide shroud 201 deflects slightly around the top pivot pin to match the tongue's movement trajectory and force angle, avoiding mechanical interference. The extended tongue creates a second dynamic acoustic barrier at the top gap that was originally opened due to the flattening of the air duct, achieving closed-loop noise control under all operating conditions.

[0058] like Figure 9 and Figure 11 As shown, to improve heat dissipation efficiency and maintain noise reduction performance under extreme operating conditions, each distribution box body 101 has a noise reduction frame 301 fixedly attached to the outside of its emergency heat dissipation window 1012. The frame has a rectangular frame structure and completely covers the window. Inside, there are uniformly distributed wave-shaped labyrinth-style sound-absorbing channels 3011 integrally formed vertically. Each noise reduction frame 301 has a linkage opening and closing baffle 302 rotatably connected to its outside. Each linkage opening and closing baffle 302 has a horizontal rotating rod 303 rigidly fixed to its front and rear ends. The upper end of each horizontal rotating rod 303 is pivotally hinged to a transmission link 305 through a pin to form a lever drive arm.

[0059] Meanwhile, each vertical sliding push plate 105 is rotatably connected to a sliding sleeve 304 at its upper part, allowing it to rise and fall synchronously with the push plate. Each sliding sleeve 304 has a movable cavity 306 inside, and the lower part of each transmission connecting rod 305 passes through the top opening of the corresponding sliding sleeve 304 and extends into the movable cavity 306 inside the sleeve. Each transmission connecting rod 305 has an inverted T-shaped limiting boss (the horizontal width is greater than the top opening to prevent it from coming out). In the initial static state, the inverted T-shaped limiting boss rests on the inner bottom surface of the movable cavity 306 of the sliding sleeve 304 due to gravity and the weight of the connecting rod. At this time, a preset gap ΔH is reserved between the top surface of the inverted T-shaped limiting boss and the inner top surface of the movable cavity 306 of the sliding sleeve 304.

[0060] When the temperature initially rises, the dual-axis servo motor 103 drives the vertical sliding push plate 105 to begin its downward movement, causing the sliding sleeve 304 on it to move downwards synchronously. At this time, because the transmission link 305 remains relatively stationary due to the resistance of the linkage opening and closing baffle 302, the inverted T-shaped limiting boss floats upwards relative to the sleeve, and the preset gap ΔH gradually decreases but does not contact. Therefore, the transmission link 305 does not move temporarily, and the linkage opening and closing baffle 302 remains closed. This ensures that the system prioritizes the adaptive flattening of the main air duct for heat dissipation, avoiding premature opening of the emergency window which could lead to noise bypass leakage.

[0061] As the temperature continues to rise, the vertical sliding push plate 105 moves down to its limit position and continues to descend (the main air duct is completely flattened). The displacement of the sliding sleeve 304 relative to the transmission connecting rod 305 reaches ΔH. At this time, the inner top surface of the movable cavity 306 of the sliding sleeve 304 and the top surface of the inverted T-shaped limiting boss of the transmission connecting rod 305 make mechanical hard contact (abut).

[0062] The remaining downward movement of the push plate forces the transmission linkage 305 downward. The downward movement of the linkage pulls the upper part of the horizontal rotating rod 303, using leverage to force the lower part of the rod to swing in the opposite direction, driving the linkage opening and closing baffle 302 to flip outward and open. The emergency window opens, and the high-temperature gas in the upper part of the chamber is quickly discharged through the labyrinth-type silencer channel 3011, forming a chimney-effect convection. This process requires no additional sensors or power supply, representing a highly reliable fail-safe design.

[0063] like Figure 1 and Figure 12 As shown, to improve heat dissipation efficiency, a heat dissipation frame 401 is fixedly attached to the top of each mounting frame 102. A heat-conducting pipe 402 connected to the heat dissipation frame 401 is provided on the inner side of each mounting frame 102 to conduct some of the heat inside the enclosure to the external heat dissipation frame 401 for auxiliary heat dissipation. Simultaneously, a rectangular mounting groove is provided on the outer side of each mounting frame 102, into which a primary dust filter 403 is embedded. The primary dust filter 403 is made of stainless steel wire mesh or synthetic fiber material, embedded in the groove, and is detachably fixed by a snap-on pressure strip or magnetic frame.

[0064] Working principle: This distribution box monitors the heat load inside the box in real time through the temperature sensor probe 110, and automatically controls the dual-axis servo motor 103 according to the preset threshold to drive the mechanical mechanism to intelligently switch between three working modes in order to achieve the best balance between heat dissipation efficiency and noise reduction performance.

[0065] When the temperature inside the chamber is lower than a preset threshold, the dual-axis servo motor 103 drives the eccentric cam push rod 104 to reset, causing the vertical sliding push plate 105 to be in a high position. At this time, the dynamic push guide rail assembly 106 maintains a high position offset relative to the fixed limit guide rail assembly 1021, pulling the active drive slider 108 upward. Under the action of the linkage mechanism, the main baffle plate 107 and the auxiliary baffle plate 1071 form a steep "double M" sawtooth structure.

[0066] The airflow is forced through a narrow and tortuous wave-shaped channel, and the sound waves come into full contact with the porous sound-absorbing liner 109 on the surface of the plate through multiple reflections, which greatly attenuates the fan noise by utilizing the high-impedance sound wave labyrinth effect.

[0067] The main baffle 107 of the top level (i.e., the 7th level) retracts, and the traction telescopic sound-absorbing tongue 202 is completely housed inside the guide shroud 201. The guide shroud 201 hangs down under the action of gravity, closely fitting the top of the baffle, eliminating the top straight gap, preventing sound leakage, and forcing all airflow into the main silencer duct.

[0068] The sliding sleeve 304 remains stationary at a high position with the push plate, and a preset gap ΔH exists between the top surface of its internal movable cavity 306 and the inverted T-shaped limiting boss at the lower end of the transmission connecting rod 305. The linkage opening and closing baffle 302 remains closed under the action of gravity, sealing the emergency heat dissipation window 1012.

[0069] When the temperature inside the chamber exceeds a preset threshold, the temperature sensor 110 triggers the dual-axis servo motor 103 to reverse, driving the vertical sliding pusher 105 downwards. The active drive slider 108 then descends, forcing the constrained driven support slider 1081 to expand horizontally outwards. The linkage mechanism is stretched laterally and flattened longitudinally, resulting in a "double M-shaped" structure that tends towards horizontal flatness. This maximizes the spacing between adjacent plates, forming a low-resistance straight ventilation channel and significantly improving the air exchange rate.

[0070] The main baffle 107 moves downward, pulling the telescopic sound-absorbing tongue 202 out from the guide shroud 201 to fill the top gap caused by the flattening of the air duct. The guide shroud 201 adaptively fine-tunes its angle to avoid interference. The extended tongue forms a second acoustic barrier, compensating for the noise reduction effect lost due to the reduction in flow resistance, and achieving closed-loop noise control under all operating conditions.

[0071] During this stage, the downward displacement of the push plate does not reach the gap ΔH, the transmission linkage 305 remains stationary, the emergency heat dissipation window 1012 remains closed, and the main air duct is used for regulation first. Once the temperature inside the chamber drops below the threshold, the motor rotates in reverse, and the mechanism resets to the "double M-type" high impedance noise reduction state.

[0072] When the temperature continues to rise, and the main air duct is fully flattened but still cannot meet the heat dissipation requirements, the vertical sliding push plate 105 continues to descend to its limit position, and the displacement of the sliding sleeve 304 relative to the transmission connecting rod 305 reaches the preset gap ΔH. At this time, the inner top surface of the sleeve movable cavity 306 makes mechanical hard contact (abutment) with the top surface of the inverted T-shaped limiting boss of the connecting rod.

[0073] The remaining downward movement of the vertical sliding push plate 105 forces the transmission linkage 305 downward, driving the horizontal rotating rod 303 to swing through the lever principle, thereby prying the linkage opening and closing baffle 302 to flip outward and open. The emergency heat dissipation window 1012 opens, and the high-temperature gas in the upper part of the box is quickly discharged through the labyrinthine sound-absorbing channel 3011 in the noise reduction outer frame 301, forming a strong chimney effect convection with the external cold air.

[0074] This process requires no additional power supply or sensor intervention, ensuring reliable heat dissipation under extreme conditions. When the temperature decreases and the push plate returns to its original position, the connecting rod floats relative to the sleeve under the action of gravity and the resistance of the baffle, the gap is restored, and the baffle closes automatically.

[0075] Throughout the operation, hot air inside the enclosure continuously washes over the heat pipe 402, and the heat is efficiently conducted to the external heat sink 401 for passive heat dissipation. The primary dust filter 403 effectively prevents external dust from entering, ensuring the long-term stable operation of the internal components.

[0076] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A distribution box with intelligent noise reduction function, characterized in that, It includes a distribution box body (101), on which active cooling fans (1011) are integrated on both the left and right side walls to create a basic forced convection airflow field; It also includes: temperature sensing probes (110), two of which are installed on the left and right walls of the distribution box body (101) respectively, for real-time monitoring of the heat load inside the box; Precision drive modules are installed on the left and right exterior sides of the main body of the distribution box (101); There are four vertical sliding push plates (105), each of which is connected to the output end of a precision drive module on the same side and is driven by it to make vertical lifting and lowering movements; The variable cross-section deflector noise reduction component is installed on the outside of the left and right sides of the distribution box body (101), and each is connected to the two vertical sliding push plates (105) on the same side. Each temperature sensor probe (110) is electrically connected to the precision drive module on the same side through the control module, and controls the precision drive module to move according to the monitored temperature signal, driving the vertical sliding push plate (105) to rise and fall, thereby driving the variable cross-section deflector noise reduction component to switch between the initial noise reduction state and the strong heat dissipation state.

2. A distribution box with intelligent noise reduction function according to claim 1, characterized in that, The variable cross-section baffle noise reduction component includes: There are two mounting frames (102), which are fixed to the left and right sides of the main body of the distribution box (101) respectively, serving as a load-bearing frame; The fixed limit guide rail assembly (1021) consists of seven sets, which are uniformly fixed to the inner wall surfaces of the front and rear sides of each mounting frame (102) along the vertical direction. The dynamic push guide rail assembly (106) is fixedly connected to the inner side of each vertical sliding push plate (105) in the vertical direction, and corresponds one-to-one with the fixed limit guide rail assembly (1021); There are three driven support sliders (1081), which are horizontally slidably embedded in each fixed limit guide rail group (1021); There are two active drive sliders (108), which are horizontally embedded in each dynamic push guide rail group (106); The main baffle (107) and the auxiliary baffle (1071) are alternately hinged to form an adaptive waveform baffle array, and are hinged between the active drive slider (108) and the driven support slider (1081) at the same level; A porous sound-absorbing liner (109) is applied to the surfaces of the main baffle (107) and the auxiliary baffle (1071).

3. A distribution box with intelligent noise reduction function according to claim 2, characterized in that, In the initial static state, the dynamic push guide rail group (106) of the same level has a preset vertical height offset relative to the fixed limit guide rail group (1021), and the offset of each level is consistent.

4. A distribution box with intelligent noise reduction function according to claim 2, characterized in that, The hinged connection sequence of the main baffle (107) and the auxiliary baffle (1071) forms a double "M"-shaped sawtooth-shaped superimposed structure.

5. A distribution box with intelligent noise reduction function according to claim 2, characterized in that, The precision drive module includes: There are two dual-axis servo motors (103), which are respectively installed on the lower part of each mounting frame (102); There are four eccentric cam push rods (104), each of which is fixed to the symmetrical output shaft of the dual-axis servo motor (103) on the same side by a coupling; Each vertical sliding push plate (105) has a rectangular guide groove at its lower part, and the drive protrusion on the eccentric cam push rod (104) on the same side is embedded in the corresponding rectangular guide groove.

6. A distribution box with intelligent noise reduction function according to claim 2, characterized in that, It also includes a top-mounted, follow-up, extended sound-absorbing module disposed in the topmost space of the inner cavity of each mounting frame (102), which includes: There are two guide fairings (201), both of which are inverted U-shaped hollow cavities. Their tops are rotatably hinged to the inner side of the top wall of the mounting frame (102) on the same side via a pivot pin. There are two telescopic sound-absorbing tongue plates (202), which are longitudinally slidably embedded in the cavity of the guide shroud (201) on the same side. Their lower ends extend out of the bottom of the guide shroud and are rotatably connected to the top of the uppermost main baffle (107) on the same side through a single degree of freedom hinge.

7. A distribution box with intelligent noise reduction function according to claim 6, characterized in that, The guide fairing (201) and the mounting frame (102) are fitted with an elastic reset component at the hinge, which allows for slight angular deflection and adaptive floating adjustment.

8. A distribution box with intelligent noise reduction function according to claim 1, characterized in that, Emergency heat dissipation windows (1012) are also provided on the left and right walls of the distribution box body (101). Emergency ventilation and soundproofing units are provided on the outside of both windows. Each unit includes: There are two noise reduction frames (301), which are fixed to the left and right walls of the distribution box body (101) and cover the corresponding emergency heat dissipation windows (1012). The interior of the frame is provided with a wave-shaped labyrinth-style sound-absorbing channel (3011). There are two linkage opening and closing baffles (302), which are rotatably connected to the outside of each noise reduction frame (301); There are four horizontal rotating rods (303), with two rods forming a group, which are fixed to the front and rear ends of the upper part of each linkage opening and closing baffle (302); There are four transmission links (305), and the upper end of each link is rotatably hinged to the upper end of the horizontal rotating rod (303) on the same side. There are four sliding sleeves (304), which are rotatably connected to the upper part of each vertical sliding push plate (105). They are provided with movable cavities (306) inside. The lower part of the transmission connecting rod (305) on the same side extends through the top opening of the corresponding sliding sleeve (304) into the movable cavity (306).

9. A distribution box with intelligent noise reduction function according to claim 8, characterized in that, Each transmission link (305) has an inverted T-shaped limiting boss machined on its lower part. The boss is located in the corresponding movable cavity (306). In the initial static state, the inverted T-shaped limiting boss rests on the inner bottom surface of the movable cavity (306), and a preset gap ΔH is reserved between its top surface and the inner top surface of the movable cavity (306).

10. A distribution box with intelligent noise reduction function according to any one of claims 1 to 9, characterized in that, Also includes: There are two heat sink brackets (401), which are fixed to the top of each mounting frame (102); There are two sets of heat pipes (402), which are respectively located inside the mounting frame (102) on the same side and connected to the heat sink (401) on the same side; There are two primary dust filters (403), which are respectively embedded in the rectangular mounting slots opened on the outside of each mounting frame (102).

Images