Heat dissipation device based on temperature monitoring and air distribution and server

Abstract

The utility model provides a heat dissipation device based on temperature monitoring and air distribution and a server. The wind scooper is internally provided with two heat dissipation air channels; a rotary flow guide plate is arranged between the two heat dissipation air channels; one end of the heat dissipation air duct covers the server power supply unit; a motor transmission mechanism used for driving the rotary flow guide plate to rotate is installed outside the wind scooper and rotationally connected with the rotary flow guide plate. The BMC module obtains the working temperature of the server power supply unit; and the BMC module controls the operation of the stepping motor based on the working temperature and the temperature difference information. According to the utility model, the rotary flow guide plate is arranged between the two heat dissipation air channels, so that the server power supply units can be separately cooled, and each server power supply unit is provided with an independent heat dissipation air channel to meet the heat dissipation requirement. The flow guide inclined plate can guide external cold air to enter the second heat dissipation air channel more smoothly, resistance and turbulent flow when air flow enters are reduced, and the air inlet efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the server heat dissipation technical field especially relates to a heat dissipation device and server based on temperature monitoring and air volume distribution. BACKGROUND

[0002] At present, as the core equipment of data storage and calculation, the performance and stability of server are increasingly improved. In the internal structure of server, the power supply unit (PSU) as the key component of energy conversion, its running temperature directly affects the overall performance and reliability of server. Especially in high-performance server, due to the existence of CPU, GPU, memory, hard disk and other high heat sources, the internal temperature distribution of server is uneven, which causes the working environment of rear PSU to not meet the operation requirements.

[0003] In related technologies, the server power heat dissipation often adopts fixed air duct design, and the fixed air duct cannot separately dissipate heat for multiple PSUs, which is prone to the situation that some PSUs are overheated and some PSUs are insufficiently cooled. Since the cooling air volume is not reasonably distributed, the PSUs are not evenly cooled, which affects the stable operation of PSUs. UTILITY MODEL CONTENTS

[0004] The utility model provides a heat dissipation device based on temperature monitoring and air volume distribution, which is provided with two air duct structures to realize air volume distribution between two PSUs, thereby solving the uneven temperature problem of side-by-side placed PSUs.

[0005] The heat dissipation device comprises: a wind deflector, which is internally provided with a first heat dissipation air duct and a second heat dissipation air duct;

[0006] A rotating flow guide plate is arranged between the first heat dissipation air duct and the second heat dissipation air duct; a first end cover of the first heat dissipation air duct is arranged on a first server power unit; and a first end cover of the second heat dissipation air duct is arranged on a second server power unit.

[0007] A motor transmission mechanism for driving the rotating flow guide plate to rotate is mounted outside the wind deflector, and the motor transmission mechanism is rotationally connected with the rotating flow guide plate.

[0008] It is further explained that the side wall of the wind deflector on one side of the second heat dissipation air duct is provided as a flow guide inclined plate.

[0009] It is further explained that the motor transmission mechanism comprises: a stepping motor and a rotating shaft.

[0010] The output end of the stepping motor is rotationally connected with the rotating shaft, and the rotating shaft extends into the inside of the wind deflector and is fixedly connected with the rotating flow guide plate.

[0011] It is further explained that the second end of the first heat dissipation air duct and the second end of the second heat dissipation air duct are air inlets,

[0012] The first end of the first heat dissipation air duct and the first end of the second heat dissipation air duct are air outlets, and the cross-sectional area of the air outlets is greater than the cross-sectional area of the air inlets.

[0013] Further, the end of the flow guide inclined plate is connected with a vertical partition plate extending out of the outer portion of the air baffle.

[0014] The application further provides a server, comprising: a cabinet, wherein a first server power supply unit, a second server power supply unit, a BMC module and a heat dissipation device are arranged in the cabinet;

[0015] The BMC module is electrically connected with a first temperature sensor arranged on the first server power supply unit to obtain a first working temperature of the first server power supply unit;

[0016] The BMC module is electrically connected with a second temperature sensor arranged on the second server power supply unit to obtain a second working temperature of the second server power supply unit;

[0017] The BMC module is electrically connected with the stepping motor and controls the stepping motor to operate based on the temperature difference information of the first working temperature and the second working temperature.

[0018] Further, the BMC module is configured with a memory;

[0019] The memory stores a plurality of maximum air inlet temperature thresholds set by a user and a comparison parameter threshold of the working temperature difference of the two server power supply units;

[0020] The BMC module compares the first working temperature and the second working temperature with the maximum air inlet temperature thresholds, and controls the stepping motor to operate in combination with the comparison result information of the temperature difference information and the comparison parameter threshold.

[0021] Further, the first server power supply unit and the second server power supply unit are arranged at the rear end of the cabinet.

[0022] Further, a fan module is arranged close to the middle portion of the cabinet, the front end of the cabinet is the air inlet direction, and the rear end of the cabinet is the air outlet direction.

[0023] Further, the memory further stores the working temperature of the server power supply unit and the speed regulation information of the fan rotating speed;

[0024] The BMC module controls the fan module to operate based on the current working temperature and the matching speed regulation information of the fan rotating speed.

[0025] From the above technical solution, the application has the following advantages:

[0026] The heat dissipation device based on temperature monitoring and air volume distribution provided in the application can separately dissipate heat for the server power supply units by arranging the rotating flow guide plates between the two heat dissipation air ducts, and each server power supply unit has a separate heat dissipation air duct to meet the heat dissipation requirement.

[0027] The side wall of the air baffle of the second heat dissipation air duct is arranged as a flow guide inclined plate, and a vertical partition plate is connected to the end of the flow guide inclined plate and extends outside the air baffle. The flow guide inclined plate can guide the external cold air to enter the second heat dissipation air duct more smoothly, reduce the resistance and turbulence when the air flow enters, and improve the air inlet efficiency; and the vertical partition plate further optimizes the air inlet direction to ensure that the cold air can accurately enter the air duct and provide more stable heat dissipation air flow for the second server power supply unit. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the present application, the drawings needed to be used in the description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0029] Figure 1 It is a schematic diagram of the heat dissipation device as a whole.

[0030] Figure 2 It is a schematic diagram of the heat dissipation device structure.

[0031] Figure 3 It is a schematic diagram of the air baffle structure.

[0032] Figure 4 It is a schematic diagram of the server structure.

[0033] Figure 5 It is a flow chart of the server power supply unit heat dissipation control mode.

[0034] Explanation of reference signs:

[0035] 1-air baffle, 2-flow guide inclined plate, 3-rotating flow guide plate, 4-stepping motor, 5-rotating shaft, 6-first heat dissipation air duct, 7-second heat dissipation air duct, 8-first server power supply unit, 9-second server power supply unit, 10-vertical partition plate, 11-fan module, 12-chassis, 13-front end of the chassis, 14-rear end of the chassis. DETAILED DESCRIPTION

[0036] In order to make the purpose, characteristics and advantages of the utility model more obvious and easy to understand, the technical solutions in the utility model will be described clearly and completely in combination with the drawings in the specific embodiments below. Obviously, the embodiments described below are only some of the embodiments of the utility model, not all. Based on the embodiments in the patent, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the patent.

[0037] As shown in Figure 1 , it is a whole schematic view of the heat dissipation device provided in the embodiment, Figure 1 One end of the air guide cover 1 is connected to the server power supply unit.

[0038] The specific connection relationship can be that the air guide cover is connected to the server power supply unit through buckling or connected to the server power supply unit through bolts.

[0039] Optionally, the air guide cover is a streamlined cover body, which can completely cover the server power supply unit to form a relatively closed air duct space. The air guide cover can be made of lightweight and high-strength materials to reduce the overall weight and manufacturing cost.

[0040] The server power supply unit involved in the embodiment is two, and the air guide cover 1 is internally provided with a first heat dissipation air duct 6 and a second heat dissipation air duct 7, as shown in Figure 2 and Figure 3 The first end cover of the first heat dissipation air duct 6 is arranged on the first server power supply unit 8; and the first end cover of the second heat dissipation air duct 7 is arranged on the second server power supply unit 9.

[0041] In order to dissipate heat for the two server power supply units respectively, and based on the operating temperature and temperature difference of the two server power supply units, the rotating flow guide plate 3 is arranged between the first heat dissipation air duct 6 and the second heat dissipation air duct 7. The air guide cover 1 is externally provided with a motor drive mechanism for driving the rotating flow guide plate 3 to rotate, and the motor drive mechanism is rotationally connected with the rotating flow guide plate 3.

[0042] In the embodiment, the temperature of the two server power supply units can be monitored based on the BMC module or other processors. The working temperature of the two server power supply units can be monitored, and the temperature difference between them can be calculated.

[0043] The working temperature threshold range and the temperature difference threshold range of the server power supply unit can be preset in the embodiment. According to the preset working temperature threshold range and the preset temperature difference threshold range, the rotating flow guide plate 3 is controlled to rotate, the first heat dissipation air duct 6 and the second heat dissipation air duct 7 are adjusted, and then the heat dissipation mode is adjusted.

[0044] Specifically, the motor drive mechanism includes a stepper motor 4 and a rotating shaft 5. The stepper motor 4 serves as a power source and has a step angle control capability, enabling rotation control. The output end of the stepper motor 4 is rotationally connected to the rotating shaft 5, which extends into the air duct 1 and is fixedly connected to the rotating guide plate 3. In this way, the stepper motor 4 can drive the rotating guide plate 3 to rotate between the first heat dissipation air duct 6 and the second heat dissipation air duct 7, thereby adjusting the air volume distribution of the two air ducts to meet the heat dissipation needs of different server power supply units.

[0045] For the heat dissipation air ducts of the present embodiment, the cross-sectional area of the air inlet of the first heat dissipation air duct 6 and the second heat dissipation air duct 7 is smaller than that of the air outlet. In this way, the airflow can be accelerated to some extent when passing through the air duct, thereby improving the heat dissipation efficiency.

[0046] When the airflow enters the air duct from the air inlet, the flow rate of the airflow will decrease, but the pressure will increase due to the gradual increase in the cross-sectional area of the air duct, which helps to more effectively carry out the heat from the server power supply unit.

[0047] The side wall of the air duct of the second heat dissipation air duct 7 is provided with a guide inclined plate 2, and the end of the guide inclined plate 2 is connected with a vertical partition plate 10 and extends outside the air duct. The guide inclined plate 2 can guide the external cold air to enter the second heat dissipation air duct 7 more smoothly, reducing the resistance and turbulence when the airflow enters, and improving the air intake efficiency; and the vertical partition plate 10 further optimizes the air intake direction, ensuring that the cold air can accurately enter the air duct and providing more stable heat dissipation airflow for the second server power supply unit 9.

[0048] In terms of automatic control, the motor drive mechanism drives the rotating guide plate 3 to rotate after receiving the instruction. For example, if the temperature of the first server power supply unit 8 is higher than the preset working temperature threshold range, the rotating guide plate 3 will rotate in the direction of increasing the ventilation volume of the first heat dissipation air duct 6 and reducing the ventilation volume of the second heat dissipation air duct 7, so that more cold air flows into the first heat dissipation air duct 6, thereby enhancing the heat dissipation effect of the first server power supply unit 8.

[0049] Conversely, if the temperature of the second server power supply unit 9 is higher than the working temperature threshold range, the rotating guide plate 3 will rotate in the opposite direction to adjust the air volume distribution of the two air ducts, and preferentially provide more heat dissipation air volume for the power supply unit with higher temperature. In this way, the external cold air continuously and stably enters the second heat dissipation air duct 7 under the guidance of the guide inclined plate 2 and the vertical partition plate 10, while the first heat dissipation air duct 6 inhales cold air from its corresponding air inlet, and the hot air in the two air ducts is discharged from the respective air outlets, forming a complete heat dissipation airflow circulation, and this circulation will be continuously optimized with the dynamic adjustment of the rotating guide plate 3 to maintain the stable working temperature of the two power supply units.

[0050] The embodiment in combination with the above heat dissipation device also provides a server, as shown in the figure Figure 4 The server comprises a case 12. The case 12 is internally provided with a first server power unit 8, a second server power unit 9, a BMC module and a heat dissipation device. Of course, the case 12 can also be internally provided with a CPU, a fan module 11 and the like according to actual needs.

[0051] The fan module 11 can be arranged near the middle part of the case 12, the front end 13 of the case is the air inlet direction, and the rear end 14 of the case is the air outlet direction. The first server power unit 8 and the second server power unit 9 are installed at the rear end of the case 12.

[0052] In the embodiment, the BMC module is electrically connected with a first temperature sensor installed on the first server power unit 8 to obtain a first working temperature of the first server power unit 8; the BMC module is electrically connected with a second temperature sensor installed on the second server power unit 9 to obtain a second working temperature of the second server power unit 9; and the BMC module is electrically connected with the stepper motor 4 and controls the stepper motor 4 to operate based on the temperature difference information of the first working temperature and the second working temperature.

[0053] Optionally, when the working temperature of the server power unit reaches the control point, the BMC module controls the fan module 11 to adjust the speed to ensure that the server power unit operates stably without overheating. At the same time, the BMC module can monitor the air inlet temperature of the server power unit in real time and output corresponding control instructions to control the angle of the rotating deflector 3 to ensure that the server power unit maintains balanced temperature distribution.

[0054] As can be seen, by monitoring the operating temperature and temperature difference of the server power unit in real time and dynamically adjusting the angle of the rotating deflector 3 and controlling the operation of the fan module 11, the heat dissipation control of the server power unit can be realized. The server power unit is ensured to operate within the preset working temperature range, and the reliability and stability of the operation of the server power unit are improved.

[0055] In a specific embodiment, the BMC module is configured with a memory; the memory can include computer storage media, such as random access memory (RAM), read only memory (ROM), non-volatile random access memory (NVRAM), electrically erasable programmable read only memory (EEPROM), flash memory, magnetic or optical data storage media, and the like.

[0056] The memory stores a plurality of maximum air inlet temperature thresholds set by a user, a comparison parameter threshold of the temperature difference of the two server power units and speed regulation information of the working temperature of the server power unit and the fan rotating speed.

[0057] The BMC module compares the first working temperature and the second working temperature with the maximum inlet air temperature threshold, and controls the stepper motor 4 to operate in combination with the comparison result information of the temperature difference information and the comparison parameter threshold. The BMC module also matches the fan speed information of the current obtained working temperature, and then controls the fan module 11 to operate.

[0058] Specifically, as shown in the figure, Figure 5 The BMC module obtains the working temperature of the first server power supply unit and the second server power supply unit and the inlet air temperature every t seconds. Among them, Figure 5 PUS0 is the first server power supply unit, and PUS1 is the second server power supply unit.

[0059] Optionally, the parameter t can be customized by the user, for example, set to 5.

[0060] The difference between the working temperatures of the two server power supply units is △T. According to the maximum inlet air temperature value of the server power supply unit, the following can be divided into four control intervals, of course, the following control intervals are only for illustrative purposes, and more control intervals and control modes can be set according to actual needs.

[0061] In this embodiment, when the maximum inlet air temperature of the server power supply unit is less than the first preset temperature threshold, it means that the server power supply unit has less heat dissipation risk, so the difference △T between the working temperatures of the two server power supply units is allowed to be larger, and b1 is set to 6 by default.

[0062] When △T > b1, it means that the temperature difference between the two server power supply units exceeds the allowed range, the BMC module determines which server power supply unit has a higher temperature, and sends an instruction to the stepper motor to rotate α degrees in the direction of the server power supply unit with a higher temperature. The stepper motor drives the rotating deflector plate to rotate correspondingly through the rotating shaft. Until the difference between the working temperatures of the two PSUs is within b1, it is determined to enter the balance interval, and the rotating deflector plate is no longer adjusted.

[0063] It should be noted that the rotation angle α can be customized by the user, and the specific angle is not limited.

[0064] When the maximum inlet air temperature of the server power supply unit is between the first preset temperature threshold and the second preset temperature threshold, the difference △T between the working temperatures of the two server power supply units is allowed to be reduced to b2, which is set to 4 by default. The first preset temperature threshold is less than the second preset temperature threshold.

[0065] When the maximum inlet air temperature of the server power supply unit is between the second preset temperature threshold and the third preset temperature threshold, the difference △T between the working temperatures of the two server power supply units is further reduced to b3, which is set to 2 by default.

[0066] When the maximum air inlet temperature of the server power supply unit is greater than 50℃, it indicates that the server power supply unit has a high risk of heat dissipation, and the difference in the working temperature of the two server power supply units is reduced to b4, which is set to 1 by default.

[0067] The above parameters b1-b4 are defined by the user, and during the adjustment process, when the temperature difference between the two server power supply units is within the allowed range, the rotating deflector only needs to maintain the current state, and therefore setting the parameters b1-b4 as the balance interval can prevent the rotating deflector from being adjusted frequently.

[0068] To further illustrate b1-b4, b1 can be understood as a set value of the allowed difference in the working temperature of the two server power supply units when the maximum air inlet temperature of the server power supply unit is less than the first preset temperature threshold. In this case, because the risk of heat dissipation is small, a relatively large temperature difference can be tolerated. b1 is set to 6, which means that when the temperature difference between the two server power supply units is less than or equal to 6℃, the system considers that the heat dissipation state is within an acceptable range, and the rotating deflector does not need to be adjusted.

[0069] For example, there are two server power supply units, the maximum air inlet temperature of the power supply unit is less than 40℃, one working temperature is 40℃, and the other is 45℃, the temperature difference △T = 5℃, which is less than b1 (default 6), at this time, it is considered that the heat dissipation is normal, and the rotating deflector maintains the current state.

[0070] Further, when the maximum air inlet temperature of the server power supply unit is between 40℃ and 45℃, it is considered that the risk of heat dissipation has increased, and therefore the allowed difference in the working temperature of the two server power supply units △T is reduced to b2.

[0071] b2 is set to 4, which means that when the temperature difference between the two server power supply units is less than or equal to 4℃, it is determined that the heat dissipation state is within an acceptable range, and the rotating deflector does not need to be adjusted.

[0072] For example, the maximum air inlet temperature of the power supply unit is 43℃, and if one server power supply unit has a working temperature of 42℃ and the other server power supply unit has a working temperature of 45℃, the temperature difference △T = 3℃, which is less than b2, and the heat dissipation state is considered to be normal.

[0073] When the maximum air inlet temperature of the server power supply unit is between 45℃ and 50℃, the risk of heat dissipation further increases, and the allowed difference in the working temperature of the two server power supply units △T is reduced to b3. b3 is set to 2, which means that when the temperature difference between the two server power supply units is less than or equal to 2℃, it is considered that the heat dissipation state is acceptable, and the rotating deflector does not need to be adjusted.

[0074] When the maximum inlet air temperature of the server power unit is greater than 50℃, the heat dissipation risk is great, and the allowed temperature difference AT of the two server power units is reduced to b4. b4 is set to 1, that is, when the temperature difference of the two server power units is less than or equal to 1℃, it is determined that the heat dissipation state is in an acceptable range, and the rotating deflector does not need to be adjusted. For example, the maximum inlet air temperature of the power unit is 52℃, if the working temperature of one server power unit is 51℃, and the working temperature of the other server power unit is 51.5℃, the temperature difference AT = 0.5℃, which is less than b4, and the system considers that the heat dissipation state is normal.

[0075] The parameters b1-b4 of the embodiment are set according to different heat dissipation risk levels, and the acceptable range of the temperature difference of the two server power units is used to judge whether the heat dissipation state is normal, and then it is determined whether the rotating deflector needs to be adjusted to balance the heat dissipation air volume of the two server power units. By setting these parameters, the rotating deflector can be effectively prevented from being adjusted frequently due to slight temperature fluctuations, and the stability and efficiency of the heat dissipation system are ensured.

[0076] It should be understood that when an element or layer is referred to as being "on", "connected to" or "coupled to" another element or layer, it can be directly on, connected or coupled to the other element or layer, or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout the drawings. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0077] Spatially relative terms, such as "under", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device is turned over, elements described as "under" or "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0078] The terms "first", "second", "third", "fourth" etc. (if any) in the description and claims of the present utility model and the above drawings are used to distinguish similar objects and do not have to be used to describe a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0079] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the present utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat dissipating device based on temperature monitoring and air volume distribution, characterized in that, The air guide cover (1) is internally provided with a first heat dissipation air duct (6) and a second heat dissipation air duct (7); The first heat dissipation air duct (6) and the second heat dissipation air duct (7) are provided with a rotating flow guide plate (3); the first end cover of the first heat dissipation air duct (6) is arranged on the first server power unit; and the first end cover of the second heat dissipation air duct (7) is arranged on the second server power unit. The air guide cover (1) is externally provided with a motor transmission mechanism for driving the rotating flow guide plate (3) to rotate, and the motor transmission mechanism is rotationally connected with the rotating flow guide plate (3).

2. The temperature monitoring and air volume distribution based heat dissipation device according to claim 1, wherein, The side wall of the air guide cover of the second heat dissipation air duct (7) is provided with a flow guide inclined plate (2).

3. The temperature monitoring and air volume distribution based heat dissipation device according to claim 1, wherein, The motor transmission mechanism comprises a stepping motor (4) and a rotating shaft (5); The output end of the stepping motor (4) is rotationally connected with the rotating shaft (5), and the rotating shaft (5) extends into the air guide cover (1) and is fixedly connected with the rotating flow guide plate (3).

4. The temperature monitoring and air volume distribution based heat dissipation device according to claim 1, wherein, The second end of the first heat dissipation air duct (6) and the second end of the second heat dissipation air duct (7) are air inlets, The first end of the first heat dissipation air duct (6) and the first end of the second heat dissipation air duct (7) are air outlets, and the cross-sectional area of the air outlet is larger than that of the air inlet.

5. The temperature monitoring and air volume distribution based heat dissipation device according to claim 2, wherein, The end of the flow guide inclined plate (2) is connected with a vertical partition plate which extends out of the air guide cover.

6. A server, characterized by The air guide cover (1) is externally provided with a motor transmission mechanism for driving the rotating flow guide plate (3) to rotate, and the motor transmission mechanism is rotationally connected with the rotating flow guide plate (3). The side wall of the air guide cover of the second heat dissipation air duct (7) is provided with a flow guide inclined plate (2). The motor transmission mechanism comprises a stepping motor (4) and a rotating shaft (5); The output end of the stepping motor (4) is rotationally connected with the rotating shaft (5), and the rotating shaft (5) extends into the air guide cover (1) and is fixedly connected with the rotating flow guide plate (3). The second end of the first heat dissipation air duct (6) and the second end of the second heat dissipation air duct (7) are air inlets, The first end of the first heat dissipation air duct (6) and the first end of the second heat dissipation air duct (7) are air outlets, and the cross-sectional area of the air outlet is larger than that of the air inlet. The end of the flow guide inclined plate (2) is connected with a vertical partition plate which extends out of the air guide cover. The air guide cover (1) is externally provided with a motor transmission mechanism for driving the rotating flow guide plate (3) to rotate, and the motor transmission mechanism is rotationally connected with the rotating flow guide plate (3). The side wall of the air guide cover of the second heat dissipation air duct (7) is provided with a flow guide inclined plate (2). The motor transmission mechanism comprises a stepping motor (4) and a rotating shaft (5); The output end of the stepping motor (4) is rotationally connected with the rotating shaft (5), and the rotating shaft (5) extends into the air guide cover (1) and is fixedly connected with the rotating flow guide plate (3). The second end of the first heat dissipation air duct (6) and the second end of the second heat dissipation air duct (7) are air inlets, The first end of the first heat dissipation air duct (6) and the first end of the second heat dissipation air duct (7) are air outlets, and the cross-sectional area of the air outlet is larger than that of the air inlet. The end of the flow guide inclined plate (2) is connected with a vertical partition plate which extends out of the air guide cover. The air guide cover (1) is externally provided with a motor transmission mechanism for driving the rotating flow guide plate (3) to rotate, and the motor transmission mechanism is rotationally connected with the rotating flow guide plate (3). The side wall of the air guide cover of the second heat dissipation air duct (7) is provided with a flow guide inclined plate (2). The motor transmission mechanism comprises a stepping motor (4) and a rotating shaft (5); The output end of the stepping motor (4) is rotationally connected with the rotating shaft (5), and the rotating shaft (5) extends into the air guide cover (1) and is fixedly connected with the rotating flow guide plate (3). The second end of the first heat dissipation air duct (6) and the second end of the second heat dissipation air duct (7) are air inlets, The first end of the first heat dissipation air duct (6) and the first end of the second heat dissipation air duct (7) are air outlets, and the cross-sectional area of the air outlet is larger than that of the air inlet. The end of the flow guide inclined plate (2) is connected with a vertical partition plate which extends out of the air guide cover. The air guide cover (1) is externally provided with a motor transmission mechanism for driving the rotating flow guide plate (3) to rotate, and the motor transmission mechanism is rotationally connected with the rotating flow guide plate (3). The side wall of the air guide cover of the second heat dissipation air duct (7) is provided with a flow guide inclined plate (2). The motor transmission mechanism comprises a stepping motor (4) and a rotating shaft (5); The output end of the stepping motor (4) is rotationally connected with the rotating shaft (5), and the rotating shaft (5) extends into the air guide cover (1) and is fixedly connected with the rotating flow guide plate (3). The second end of the first heat dissipation air duct (6) and the second end of the second heat dissipation air duct (7) are air inlets, The first end of the first heat dissipation air duct (6) and the first end of the second heat dissipation air duct (7) are air outlets, and the cross-sectional area of the air outlet is larger than that of the air inlet. The end of the flow guide inclined plate (2) is connected with a vertical partition plate which extends out of the air guide cover.

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