CN112363595B - Air cooling heat dissipation device and method - Google Patents
Air cooling heat dissipation device and method Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
- G06F1/206—Cooling means comprising thermal management
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3058—Monitoring arrangements for monitoring environmental properties or parameters of the computing system or of the computing system component, e.g. monitoring of power, currents, temperature, humidity, position, vibrations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention provides an air-cooling heat dissipation device and a method, wherein the device comprises a fan, a BMC, an air speed measuring module and an air quantity distribution module; the server case is internally provided with a plurality of functional modules, and the fan is also arranged in the server case; the wind speed measuring module is arranged outside each functional module; the air quantity distribution module is arranged between the fan and the functional module; the BMC is connected with the fan, the wind speed measuring module and the wind quantity distribution module; the BMC obtains the air output and the temperature of each functional module through the air speed measuring module, controls the rotating speed of the fan, and adjusts the air output of each functional module through the air distribution module. According to the invention, the wind speed and the temperature are taken as the basis of heat dissipation regulation and control, so that the accuracy and the flexibility of the heat dissipation regulation and control are improved, meanwhile, the air quantity is dynamically distributed to each functional module according to the requirement, the rotating speed of the fan is minimized, the utilization efficiency of the fan is improved, the energy efficiency ratio is improved, and the noise of the fan is reduced.
Description
Technical Field
The invention belongs to the technical field of server air-cooling heat dissipation, and particularly relates to an air-cooling heat dissipation device and method.
Background
The air cooling system still has the advantages of low cost, convenient maintenance, relatively mature technology and the like, and is the most widely used heat dissipation mode in the current data center; the fan of the server has the function of accelerating the flow speed of the air on the surface of the radiating fin so as to improve the heat exchange speed of the radiating fin and the air, and the faster the air flows through the heating component, the larger the unit flow of the air is, and the better the radiating effect is; however, air cooling heat dissipation has problems and challenges, such as low energy efficiency ratio, high fan noise, and the like, and particularly under the trend of continuously improving the chip performance and continuously increasing the power consumption, the challenges encountered by air cooling heat dissipation are increasingly larger.
The basic modules in the server are the same, and the server comprises a computing unit, a memory unit, a storage module, a power module, an expansion unit, a management module and the like; at present, a management unit (BMC) detects the temperature (Inlet Temperature) of an air inlet, the temperature (Outlet Temperature) of an air outlet and the temperature of each functional module, and controls the rotating speed of a fan through a designed fan speed regulation strategy, so that the effect of regulating the temperature is achieved. The power consumption and the temperature of each functional module in the server are in dynamic change along with the change of operation business, and as the air channel is fixed in the traditional design, the air output of each functional module is not monitored, and the fine adjustment of the air output of the heating module cannot be realized.
The fan control mode of the current server is as follows: the BMC controls the rotation speed of the fan by detecting the temperature of each point in the chassis and using a PWM special control pipe foot, the signal passes through the CPLD from the BMC and then reaches the fan interface, when the CPLD detects that the BMC is hung up, the CPLD actively controls each fan, and the general rotation speed is adjusted to 80% or 100% rotation speed, or according to the actual heat dissipation test, the highest heat dissipation requirement is met. CPLD monitors the fan speed (TACH) signal, BMC polls the speed through I2C, the speed is in direct proportion to the fan air output, and the speed is used as the basis for judging the normal operation of the fan.
The total output air quantity of the fan can be obtained through a fan rotating speed (TACH) signal, but the actual output air quantity of each heating functional module is not detected, and the effective air quantity flowing through each heating functional module cannot be estimated. And when the temperature of a certain functional module rises, the fan rotating speed can be increased only, and the mode of strong wind flood irrigation is adopted, so that the fine adjustment of the air quantity can not be realized, and the fan regulation and control efficiency is lower.
This is a disadvantage of the prior art, and therefore, it is necessary to provide an air-cooled heat dissipation device and method for solving the above-mentioned drawbacks of the prior art.
Disclosure of Invention
Aiming at the defects that the traditional design of the server in the prior art has fixed air passage, the air output of each functional module is not monitored, and the air output of the heating module cannot be finely regulated, so that the regulation and control efficiency of the fan is low, the invention provides an air cooling heat dissipation device and an air cooling heat dissipation method, and aims to solve the technical problems.
In a first aspect, the invention provides an air cooling heat dissipation device, which comprises a fan, a BMC, an air speed measuring module and an air quantity distribution module;
the server case is internally provided with a plurality of functional modules, and the fan is also arranged in the server case;
the wind speed measuring module is arranged outside each functional module;
the air quantity distribution module is arranged between the fan and the functional module;
the BMC is connected with the fan, the wind speed measuring module and the wind quantity distribution module;
the BMC obtains the air output and the temperature of each functional module through the air speed measuring module, controls the rotating speed of the fan, and adjusts the air output of each functional module through the air distribution module.
Further, a radiator is arranged outside each functional module, and the wind speed measuring module is arranged at the radiator;
dividing the functional module into a primary functional module and a secondary functional module according to the distance between the functional module and the fan;
the first-level functional module comprises a memory unit and a computing unit;
the secondary functional module comprises a power supply unit, a management unit and an expansion unit;
the first-level functional module is arranged between the fan and the second-level functional module;
the air quantity distribution module comprises a primary air quantity distribution unit and a secondary air quantity distribution unit;
the primary air quantity distribution unit is arranged between the fan and the primary functional module, and the secondary air quantity distribution unit is arranged between the primary functional module and the secondary functional module.
Further, the functional module further comprises a storage unit, the storage unit is arranged on one side of the fan, and the storage unit and the primary functional module are respectively arranged on two sides of the fan.
Further, the primary air quantity distribution unit comprises a longitudinal shutter type wind shielding blade, the longitudinal shutter type wind shielding blade is connected with a first electric proportional valve, and the first electric proportional valve is connected with the BMC;
the secondary air quantity distribution unit comprises a transverse shutter type wind shielding blade, the transverse shutter type wind shielding blade is connected with a second electric proportional valve, and the second electric proportional valve is connected with the BMC. The primary air quantity distribution unit and the secondary air quantity distribution unit are matched for use, so that the adjustment of the omni-directional air quantity and the direction is realized.
Further, the wind speed measurement module comprises a bottom plate, a triaxial acceleration sensor and a temperature sensor;
the base plate is provided with a flexible PCB, and the triaxial acceleration sensor and the temperature sensor are arranged on the flexible PCB and are connected with an external BMC through an I2C bus;
one end of the bottom plate is provided with a horizontal rotating shaft, the horizontal rotating shaft is arranged at the radiator fins outside the functional module, and the bottom plate can rotate around the horizontal rotating shaft. The triaxial acceleration sensor adopts an ADXL345 type triaxial acceleration sensor; the same wind speed measuring module is arranged outside different functional modules, so that the measured value units among different functional modules of the server system are unified.
In a second aspect, the present invention provides an air-cooled heat dissipation method, including the steps of:
s1, BMC monitors the temperature of each functional module and the air quantity of an air outlet in real time;
s2, when the temperature of a certain functional module exceeds the upper limit of a temperature threshold, the BMC controls the fan to increase the rotating speed, controls the air quantity distribution module of the functional module with the temperature exceeding the upper limit to increase the air quantity, controls the air quantity distribution module of the functional module with the temperature exceeding the lower limit to reduce the air quantity, and monitors the adjustment of the air quantity of the air outlets of all the functional modules through the air speed measuring module;
s3, when the temperature of the functional module is lower than the lower limit of the temperature threshold, the BMC controls the fan to reduce the rotating speed, controls the air distribution module of the functional module with the temperature lower than the upper limit to reduce the air output, controls the air distribution module of the functional module with the temperature exceeding the lower limit to increase the air output, and monitors the adjustment of the air output of the air outlets of the functional modules through the air speed measuring module.
Further, the step S1 further includes the following steps:
S1A, the wind speed measuring module is arranged at the position of an air outlet of each functional module of the server, and the air quantity distribution module is arranged between each function and the fan.
Further, the specific steps of step S1A are as follows:
S1A1, arranging wind speed measuring modules at radiator fins outside each functional module of the server;
S1A2, setting a horizontal rotating shaft of a wind speed testing module to be horizontally arranged, and enabling a bottom plate of the wind speed testing module to rotate around the horizontal rotating shaft along with wind flow;
S1A3, arranging a primary air quantity distribution unit between primary functional modules adjacent to the fan, wherein the primary air quantity distribution unit is provided with longitudinal shutter type wind shielding blades;
S1A4, a secondary air quantity distribution unit is arranged between the primary functional module and the secondary functional module, the primary functional module is arranged between the fan and the secondary functional module, and the secondary air quantity distribution unit is arranged to adopt a transverse shutter type wind shielding blade.
Further, the specific steps of step S1 are as follows:
s11, the BMC measures the wind speed of the air outlet of the corresponding functional module through a triaxial acceleration sensor arranged on the wind speed measuring module;
s12, BMC obtains the air outlet area of a preset functional module, and calculates the air outlet air quantity according to the air outlet air speed and the air outlet area of the functional module;
s13, the BMC measures the temperature of the corresponding functional module through a temperature sensor arranged on the wind speed measuring module;
if the temperatures of the functional modules are normal, returning to the step S11;
if the temperature of a certain functional module exceeds the upper limit of the temperature threshold, the step S2 is entered;
if the temperature of a certain functional module is lower than the lower limit of the temperature threshold, the step S3 is carried out.
Further, the specific steps of step S3 are as follows:
s21, the BMC increases the rotating speed of the fan through the PWM module;
s22, the BMC adjusts a longitudinal shutter type wind shielding blade of the primary air quantity distribution unit and a transverse shutter type wind shielding blade of the secondary air quantity distribution unit through an electromagnetic proportional valve, and monitors the adjustment of the air quantity of the air outlets of all the functional modules through an air speed measurement module, so that the air flow speed of the functional module with the temperature exceeding the upper limit is increased, and the air speed of the functional module with the normal temperature is unchanged;
s23, the BMC judges whether the temperature of the corresponding functional module is reduced to a normal value;
if yes, returning to the step S11;
if not, returning to the step S21;
the specific steps of the step S3 are as follows:
s31, the BMC reduces the rotating speed of the fan through the PWM module;
s32, BMC adjusts a longitudinal shutter type wind shielding blade of a primary air quantity distribution unit and a transverse shutter type wind shielding blade of a secondary air quantity distribution unit through an electromagnetic proportional valve, and monitors the adjustment of the air quantity of the air outlets of all the functional modules through an air speed measurement module, so that the air flow speed of the functional module with the temperature lower than the lower limit is reduced, and the air speed of the functional module with the normal temperature is unchanged;
s33, the BMC judges whether the temperature of the corresponding functional module rises to a normal value;
if yes, returning to the step S11;
if not, return to step S31.
The invention has the advantages that,
according to the air-cooling heat dissipation device and method provided by the invention, the temperature of the functional module and the air quantity of the air outlet are monitored in real time through the BMC, and the air quantity distribution module is dynamically regulated, so that the temperature of the functional module is maintained in a safe interval, the air speed and the temperature are taken as the basis of heat dissipation regulation and control, the accuracy and the flexibility of heat dissipation regulation and control are improved, the air quantity is dynamically distributed to each functional module as required, the rotating speed of a fan is minimized, the utilization efficiency of the fan is improved, the energy efficiency ratio is improved, and the noise of the fan is reduced.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
It can be seen that the present invention has outstanding substantial features and significant advances over the prior art, as well as the benefits of its implementation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic view of a wind flow heat dissipating device according to the present invention;
FIG. 2 is a schematic diagram of a wind flow heat sink control of the present invention;
FIG. 3 is a schematic view of the structure of the wind speed measurement module of the present invention;
FIG. 4 is a schematic view of the wind speed measurement module of the present invention rotated about a horizontal axis of rotation with wind flow;
FIG. 5 is a schematic exploded view of the wind speed measurement module of the present invention;
FIG. 6 is a schematic view of the air distribution module structure of the present invention;
FIG. 7 is a schematic view of a wind speed test module installation of the present invention;
FIG. 8 is a schematic diagram of a process flow of the present invention;
FIG. 9 is a second flow chart of the method of the present invention;
in the figure, 1-fan; 2-BMC; 3-a wind speed measurement module; 3.1-a bottom plate; 3.2-triaxial acceleration sensor; 3.3-a temperature sensor; 3.4-flexible PCB; 3.5-a horizontal rotating shaft; a 3.6-I2C bus; 3.7-cables; 4-an air quantity distribution module; 4.1-a primary air quantity distribution unit; 4.2-a secondary air distribution unit; 5-server chassis; 6-a first-level functional module; 6.1-memory units; a 2-calculation unit; 7-a secondary functional module; 7.1-a power supply unit; 7.2-a management unit; 7.3-expansion unit; an 8-memory cell; 9-longitudinal louvered wind blades; 10-transverse louvered wind shield blades; 11-heat sink fins.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution 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 apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Example 1:
as shown in fig. 1 and 2, the invention provides an air-cooled heat dissipation device, which comprises a fan 1, a BMC 2, an air speed measuring module 3 and an air quantity distributing module 4;
a plurality of functional modules are arranged in the server case 5, and the fan 1 is also arranged in the server case 5;
the wind speed measuring module 3 is arranged outside each functional module;
the air quantity distribution module 4 is arranged between the fan 1 and the functional module;
the BMC 2 obtains the air output and the temperature of each functional module through the air speed measuring module 3, controls the rotating speed of the fan 1, and adjusts the air output of each functional module through the air distribution module 4.
Example 2:
as shown in fig. 1, the invention provides an air cooling device, which comprises a fan 1, a BMC 2, an air speed measuring module 3 and an air quantity distributing module 4;
a plurality of functional modules are arranged in the server case 5, and the fan 1 is also arranged in the server case 5;
the outside of each functional module is provided with a radiator, and the wind speed measuring module 3 is arranged at the radiator;
the air quantity distribution module 4 is arranged between the fan 1 and the functional module;
the BMC 2 obtains the air output and the temperature of each functional module through the air speed measuring module 3, controls the rotating speed of the fan 1, and adjusts the air output of each functional module through the air distribution module 4;
the functional modules are divided into a primary functional module 6 and a secondary functional module 7 according to the distance from the fan 1;
the primary function module 6 comprises a memory unit 6.1 and a calculation unit 6.2;
the secondary functional module 7 comprises a power supply unit 7.1, a management unit 7.2 and an expansion unit 7.3;
the primary functional module 6 is arranged between the fan 1 and the secondary functional module 7;
the air distribution module 4 comprises a primary air distribution unit 4.1 and a secondary air distribution unit 4.2;
the primary air quantity distribution unit 4.1 is arranged between the fan 1 and the primary functional module 6, and the secondary air quantity distribution unit 4.2 is arranged between the primary functional module 6 and the secondary functional module 7;
the functional module further comprises a storage unit 8, the storage unit 8 is arranged on one side of the fan 1, and the storage unit 8 and the primary functional module 6 are respectively arranged on two sides of the fan 1.
In some embodiments, as shown in fig. 6, the primary air distribution unit 4.1 includes a longitudinal shutter type wind shielding blade 9, and the longitudinal shutter type wind shielding blade 9 is connected with a first electric proportional valve, and the first electric proportional valve is connected with the BMC 2;
the secondary air distribution unit 4.2 comprises a transverse louver type wind shielding blade 10, wherein the transverse louver type wind shielding blade 10 is connected with a second electric proportional valve, and the second electric proportional valve is connected with the BMC 2.
In certain embodiments, as shown in fig. 3, the wind speed measurement module 3 comprises a base plate 3.1, a triaxial acceleration sensor 3.2 and a temperature sensor 3.3;
the flexible PCB 3.4 is arranged on the bottom plate 3.1, the triaxial acceleration sensor 3.2 and the temperature sensor 3.3 are arranged on the flexible PCB 3.4 and are connected with the external BMC 2 through the I2C bus 3.6 by the cable 3.7;
one end of the bottom plate 3.1 is provided with a horizontal rotating shaft 3.5, as shown in fig. 7, the horizontal rotating shaft 3.5 is arranged at the radiator fins 11 outside the functional module, and the bottom plate 3.1 can rotate around the horizontal rotating shaft 3.5.
Example 3:
as shown in fig. 8, the present invention provides an air-cooling heat dissipation method, which includes the following steps:
s1, BMC monitors the temperature of each functional module and the air quantity of an air outlet in real time;
s2, when the temperature of a certain functional module exceeds the upper limit of a temperature threshold, the BMC controls the fan to increase the rotating speed, controls the air quantity distribution module of the functional module with the temperature exceeding the upper limit to increase the air quantity, controls the air quantity distribution module of the functional module with the temperature exceeding the lower limit to reduce the air quantity, and monitors the adjustment of the air quantity of the air outlets of all the functional modules through the air speed measuring module;
s3, when the temperature of the functional module is lower than the lower limit of the temperature threshold, the BMC controls the fan to reduce the rotating speed, controls the air distribution module of the functional module with the temperature lower than the upper limit to reduce the air output, controls the air distribution module of the functional module with the temperature exceeding the lower limit to increase the air output, and monitors the adjustment of the air output of the air outlets of the functional modules through the air speed measuring module.
Example 4:
as shown in fig. 9, the present invention provides an air-cooling heat dissipation method, which includes the following steps:
S1A, setting an air outlet position of each functional module of a server by an air speed measuring module, and setting an air quantity distribution module between each function and a fan; the method comprises the following specific steps:
S1A1, arranging wind speed measuring modules at radiator fins outside each functional module of the server;
S1A2, setting a horizontal rotating shaft of a wind speed testing module to be horizontally arranged, and enabling a bottom plate of the wind speed testing module to rotate around the horizontal rotating shaft along with wind flow;
S1A3, arranging a primary air quantity distribution unit between primary functional modules adjacent to the fan, wherein the primary air quantity distribution unit is provided with longitudinal shutter type wind shielding blades;
S1A4, a secondary air quantity distribution unit is arranged between the primary functional module and the secondary functional module, the primary functional module is arranged between the fan and the secondary functional module, and the secondary air quantity distribution unit is arranged to adopt a transverse shutter type wind shielding blade;
s1, BMC monitors the temperature of each functional module and the air quantity of an air outlet in real time; the method comprises the following specific steps:
s11, the BMC measures the wind speed of the air outlet of the corresponding functional module through a triaxial acceleration sensor arranged on the wind speed measuring module;
s12, BMC obtains the air outlet area of a preset functional module, and calculates the air outlet air quantity according to the air outlet air speed and the air outlet area of the functional module;
s13, the BMC measures the temperature of the corresponding functional module through a temperature sensor arranged on the wind speed measuring module;
if the temperatures of the functional modules are normal, returning to the step S11;
if the temperature of a certain functional module exceeds the upper limit of the temperature threshold, the step S2 is entered;
if the temperature of a certain functional module is lower than the lower limit of the temperature threshold, the step S3 is carried out;
s2, when the temperature of a certain functional module exceeds the upper limit of a temperature threshold, the BMC controls the fan to increase the rotating speed, controls the air quantity distribution module of the functional module with the temperature exceeding the upper limit to increase the air quantity, controls the air quantity distribution module of the functional module with the temperature exceeding the lower limit to reduce the air quantity, and monitors the adjustment of the air quantity of the air outlets of all the functional modules through the air speed measuring module; the method comprises the following specific steps:
s21, the BMC increases the rotating speed of the fan through the PWM module;
s22, the BMC adjusts a longitudinal shutter type wind shielding blade of the primary air quantity distribution unit and a transverse shutter type wind shielding blade of the secondary air quantity distribution unit through an electromagnetic proportional valve, and monitors the adjustment of the air quantity of the air outlets of all the functional modules through an air speed measurement module, so that the air flow speed of the functional module with the temperature exceeding the upper limit is increased, and the air speed of the functional module with the normal temperature is unchanged;
s23, the BMC judges whether the temperature of the corresponding functional module is reduced to a normal value;
if yes, returning to the step S11;
if not, returning to the step S21;
s3, when the temperature of a certain functional module is lower than the lower limit of the temperature threshold, the BMC controls the fan to reduce the rotating speed, controls the air quantity distribution module of the functional module with the temperature lower than the upper limit to reduce the air quantity, controls the air quantity distribution module of the functional module with the temperature exceeding the lower limit to increase the air quantity, and monitors the adjustment of the air quantity of the air outlets of all the functional modules through the air speed measuring module; the method comprises the following specific steps:
s31, the BMC reduces the rotating speed of the fan through the PWM module;
s32, the BMC adjusts a longitudinal shutter type wind shielding blade of the primary air quantity distribution unit and a transverse shutter type wind shielding blade of the secondary air quantity distribution unit through an electromagnetic proportional valve, so that the air flow speed of a functional module with the temperature lower than the lower limit is reduced, and the air speed of a functional module with the normal temperature is unchanged;
s33, the BMC judges whether the temperature of the corresponding functional module rises to a normal value;
if yes, returning to the step S11;
if not, return to step S31.
In certain embodiments, step S12 is specifically implemented by:
as shown in fig. 4 and 5, the wind speed measuring module 3 is suspended at a wind speed position to be detected, and the wind speed measuring module 3 has a centroid O and is subjected to constant gravity G; when the wind speed is 0, the wind speed measuring module 3 is vertically downward, the three-axis acceleration sensor 3.2 on the wind speed measuring module 3 is subjected to the action of gravity acceleration g, the detection value is (g, 0), and the detection value BMC 2 is acquired through the I2C bus 3.6;
when the wind speed is not 0, the wind speed measuring module 3 rotates by an angle alpha under the action of wind force F, and at the moment, the module gravity G, the wind force F and the supporting force N of the shaft are in stress balance, wherein F is cos (alpha) =G is sin (alpha); the three-axis acceleration sensor 3.2 detection values (gx, gy, gz) are the components of the gravitational acceleration g in three directions and satisfy
According to the formula of air resistance:
the calculation is performed such that,
wherein: c is the air resistance coefficient; ρ is the air density; s the windward area of the object; v is the relative motion speed of the object and air; from the above, the air resistance is proportional to the air resistance coefficient and the windward area and proportional to the square of the speed under normal conditions;
windward area s=s×cos (α), where S is the wind speed measurement module area, and the above formula is sorted:
wherein the gravity G, the air resistance coefficient C, the air density rho, the gravity acceleration G and the module area S are all constant, so +.>
The BMC 2 reads the data (gx, gy and gz) of the triaxial acceleration sensor 3.2 on the wind speed measuring module 3 through the I2C bus 3.6, and then the output wind speed of the corresponding functional module can be obtained, and the wind speed information reflects the wind quantity actually flowing through the functional module.
Although the present invention has been described in detail by way of preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and it is intended that all such modifications and substitutions be within the scope of the present invention/be within the scope of the present invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The air cooling heat dissipation device is characterized by comprising a fan, a BMC, an air speed measuring module and an air quantity distribution module;
the server case is internally provided with a plurality of functional modules, and the fan is also arranged in the server case;
the wind speed measuring module is arranged outside each functional module;
the air quantity distribution module is arranged between the fan and the functional module;
the BMC is connected with the fan, the wind speed measuring module and the wind quantity distribution module;
the outside of each functional module is provided with a radiator, and the wind speed measuring module is arranged at the radiator;
dividing the functional module into a primary functional module and a secondary functional module according to the distance between the functional module and the fan;
the first-level functional module comprises a memory unit and a computing unit;
the secondary functional module comprises a power supply unit, a management unit and an expansion unit;
the first-level functional module is arranged between the fan and the second-level functional module;
the air quantity distribution module comprises a primary air quantity distribution unit and a secondary air quantity distribution unit;
the primary air quantity distribution unit is arranged between the fan and the primary functional module, and the secondary air quantity distribution unit is arranged between the primary functional module and the secondary functional module;
the primary air quantity distribution unit comprises a longitudinal shutter type wind shielding blade, wherein the longitudinal shutter type wind shielding blade is connected with a first electric proportional valve, and the first electric proportional valve is connected with the BMC;
the secondary air quantity distribution unit comprises a transverse shutter type wind shielding blade, the transverse shutter type wind shielding blade is connected with a second electric proportional valve, and the second electric proportional valve is connected with the BMC;
the wind speed measurement module comprises a bottom plate, a triaxial acceleration sensor and a temperature sensor;
the base plate is provided with a flexible PCB, and the triaxial acceleration sensor and the temperature sensor are arranged on the flexible PCB and are connected with an external BMC through an I2C bus;
one end of the bottom plate is provided with a horizontal rotating shaft, the horizontal rotating shaft is arranged at the radiator fins outside the functional module, and the bottom plate can rotate around the horizontal rotating shaft;
the wind speed measuring module is hung at a position of a wind speed to be detected, has a mass center and receives constant gravity G; when the wind speed is 0, the wind speed measuring module is vertically downward, and the three-axis acceleration sensor on the wind speed measuring module is subjected to the action of gravity acceleration g, the detection value is (g, 0), and the detection value BMC is obtained through an I2C bus;
when the wind speed is not 0, the wind speed measuring module rotates by an angle alpha under the action of wind force F, and at the moment, the gravity G of the module, the wind force F and the supporting force N of the shaft are balanced in stress, wherein F is cos (alpha) =G is sin (alpha); the three-axis acceleration sensor detection values (gx, gy, gz) at this time are the components of the gravitational acceleration g in three directions, and satisfy sin (α) =
,cos(α)= />
；
According to the formula of air resistance: f=
The calculation is performed such that,
wherein: c is the air resistance coefficient; ρ is the air density; s the windward area of the object; v is the relative motion speed of the object and air; from the above, the air resistance is proportional to the air resistance coefficient and the windward area and proportional to the square of the speed under normal conditions;
windward area s=s×cos (α), where S is the wind speed measurement module area, and the above formula is sorted: v 2 =
Wherein the gravity G, the air resistance coefficient C, the air density rho, the gravity acceleration G and the module area S are all constant, so v is ≡ +.>
；
The BMC reads triaxial acceleration sensor data (gx, gy and gz) on the wind speed measurement module through the I2C bus to obtain output wind speed of the corresponding functional module, wherein wind speed information reflects the wind quantity actually flowing through the functional module;
the BMC obtains the air output and the temperature of each functional module through the air speed measuring module, controls the rotating speed of the fan, and adjusts the air output of each functional module through the air distribution module.
2. The air-cooled heat sink of claim 1, wherein the functional module further comprises a storage unit, the storage unit is disposed at one side of the fan, and the storage unit and the primary functional module are disposed at two sides of the fan, respectively.
3. An air-cooling heat dissipation method is characterized by comprising the following steps:
S1A, setting an air outlet position of each functional module of a server by an air speed measuring module, and setting an air quantity distribution module between each functional module and a fan; the specific steps of the step S1A are as follows:
S1A1, arranging wind speed measuring modules at radiator fins outside each functional module of the server;
S1A2, setting a horizontal rotating shaft of a wind speed testing module to be horizontally arranged, and enabling a bottom plate of the wind speed testing module to rotate around the horizontal rotating shaft along with wind flow;
S1A3, arranging a primary air quantity distribution unit between primary functional modules adjacent to the fan, wherein the primary air quantity distribution unit is provided with longitudinal shutter type wind shielding blades;
S1A4, a secondary air quantity distribution unit is arranged between the primary functional module and the secondary functional module, the primary functional module is arranged between the fan and the secondary functional module, and the secondary air quantity distribution unit is arranged to adopt a transverse shutter type wind shielding blade;
s1, BMC monitors the temperature of each functional module and the air quantity of an air outlet in real time; the specific steps of the step S1 are as follows: s11, the BMC measures the wind speed of the air outlet of the corresponding functional module through a triaxial acceleration sensor arranged on the wind speed measuring module;
s12, BMC obtains the air outlet area of a preset functional module, and calculates the air outlet air quantity according to the air outlet air speed and the air outlet area of the functional module;
the wind speed measuring module is hung at a position of a wind speed to be detected, has a mass center and receives constant gravity G; when the wind speed is 0, the wind speed measuring module is vertically downward, and the three-axis acceleration sensor on the wind speed measuring module is subjected to the action of gravity acceleration g, the detection value is (g, 0), and the detection value BMC is obtained through an I2C bus;
when the wind speed is not 0, the wind speed measuring module rotates by an angle alpha under the action of wind force F, and at the moment, the gravity G of the module, the wind force F and the supporting force N of the shaft are balanced in stress, wherein F is cos (alpha) =G is sin (alpha); the three-axis acceleration sensor detection values (gx, gy, gz) at this time are the components of the gravitational acceleration g in three directions, and satisfy sin (α) =
,cos(α)= />
；
According toFormula of air resistance: f=
The calculation is performed such that,
wherein: c is the air resistance coefficient; ρ is the air density; s the windward area of the object; v is the relative motion speed of the object and air; from the above, the air resistance is proportional to the air resistance coefficient and the windward area and proportional to the square of the speed under normal conditions;
windward area s=s×cos (α), where S is the wind speed measurement module area, and the above formula is sorted: v 2 =
Wherein the gravity G, the air resistance coefficient C, the air density rho, the gravity acceleration G and the module area S are all constant, so v is ≡ +.>
；
The BMC reads triaxial acceleration sensor data (gx, gy and gz) on the wind speed measurement module through the I2C bus to obtain output wind speed of the corresponding functional module, wherein wind speed information reflects the wind quantity actually flowing through the functional module;
s13, the BMC measures the temperature of the corresponding functional module through a temperature sensor arranged on the wind speed measuring module;
if the temperatures of the functional modules are normal, returning to the step S11;
if the temperature of a certain functional module exceeds the upper limit of the temperature threshold, the step S2 is entered;
if the temperature of a certain functional module is lower than the lower limit of the temperature threshold, the step S3 is carried out;
s2, when the temperature of a certain functional module exceeds the upper limit of a temperature threshold, the BMC controls the fan to increase the rotating speed, controls the air quantity distribution module of the functional module with the temperature exceeding the upper limit to increase the air quantity, controls the air quantity distribution module of the functional module with the temperature exceeding the lower limit to reduce the air quantity, and monitors the adjustment of the air quantity of the air outlets of all the functional modules through the air speed measuring module;
s3, when the temperature of the functional module is lower than the lower limit of the temperature threshold, the BMC controls the fan to reduce the rotating speed, controls the air distribution module of the functional module with the temperature lower than the upper limit to reduce the air output, controls the air distribution module of the functional module with the temperature exceeding the lower limit to increase the air output, and monitors the adjustment of the air output of the air outlets of the functional modules through the air speed measuring module.
4. An air-cooled heat dissipation method as set forth in claim 3, wherein the step S2 comprises the specific steps of:
s21, the BMC increases the rotating speed of the fan through the PWM module;
s22, the BMC adjusts a longitudinal shutter type wind shielding blade of the primary air quantity distribution unit and a transverse shutter type wind shielding blade of the secondary air quantity distribution unit through an electromagnetic proportional valve, and monitors the adjustment of the air quantity of the air outlets of all the functional modules through an air speed measurement module, so that the air flow speed of the functional module with the temperature exceeding the upper limit is increased, and the air speed of the functional module with the normal temperature is unchanged;
s23, the BMC judges whether the temperature of the corresponding functional module is reduced to a normal value;
if yes, returning to the step S11;
if not, returning to the step S21;
the specific steps of the step S3 are as follows:
s31, the BMC reduces the rotating speed of the fan through the PWM module;
s32, BMC adjusts a longitudinal shutter type wind shielding blade of a primary air quantity distribution unit and a transverse shutter type wind shielding blade of a secondary air quantity distribution unit through an electromagnetic proportional valve, and monitors the adjustment of the air quantity of the air outlets of all the functional modules through an air speed measurement module, so that the air flow speed of the functional module with the temperature lower than the lower limit is reduced, and the air speed of the functional module with the normal temperature is unchanged;
s33, the BMC judges whether the temperature of the corresponding functional module rises to a normal value;
if yes, returning to the step S11;
if not, return to step S31.
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| CN1704865A (en) * | 2004-06-02 | 2005-12-07 | 联想(北京)有限公司 | Server heat dissipation administrative system and method thereof |
| CN108916097A (en) * | 2018-06-29 | 2018-11-30 | 深圳市同泰怡信息技术有限公司 | Server fan control method and server |
| CN110362175A (en) * | 2019-06-29 | 2019-10-22 | 苏州浪潮智能科技有限公司 | A kind of control method for fan and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1704865A (en) * | 2004-06-02 | 2005-12-07 | 联想(北京)有限公司 | Server heat dissipation administrative system and method thereof |
| CN108916097A (en) * | 2018-06-29 | 2018-11-30 | 深圳市同泰怡信息技术有限公司 | Server fan control method and server |
| CN110362175A (en) * | 2019-06-29 | 2019-10-22 | 苏州浪潮智能科技有限公司 | A kind of control method for fan and device |
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