CN102808796B - Method and system for controlling rotating speed of fan - Google Patents
Method and system for controlling rotating speed of fan Download PDFInfo
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- CN102808796B CN102808796B CN201210315733.5A CN201210315733A CN102808796B CN 102808796 B CN102808796 B CN 102808796B CN 201210315733 A CN201210315733 A CN 201210315733A CN 102808796 B CN102808796 B CN 102808796B
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Abstract
The invention provides a method and a system for controlling the rotating speed of a fan. The system comprises a monitoring unit for monitoring the work environment of electronic equipment and further comprises a temperature monitoring module and a power monitoring module, wherein the temperature monitoring module is positioned at an air inlet and an air outlet of the electronic equipment and is used for respectively monitoring and outputting the temperatures at the air inlet and the air outlet; and the power monitoring module is used for monitoring and outputting the power of the electronic equipment; and a control unit is connected with the monitoring unit and the fan and is used for calculating the temperature difference between the air inlet and the air outlet after the temperatures outputted by the temperature monitoring module at the air inlet and the air outlet are received as well as the power of the electronic equipment outputted by the power monitoring module, obtaining the air density in the environment where the electronic equipment is positioned based on the temperature difference, the power and the rotating speed of the fan, and controlling the rotating speed of the fan based on the air density. Therefore, the rotating speed of the fan can be intelligently changed.
Description
Technical field
The present invention relates to a kind of controlling method, particularly relate to a kind of method and system of controlling rotation speed of the fan.
Background technique
Air heat dissipation technology based on fan is the most frequently used mode for electronic equipment dissipating heat.Particularly, the air quantity that fan is exported within the unit time is larger, and the effect of its heat radiation is better, but simultaneously, air output is directly proportional to watt level, and for low altitude area and high altitude localities, the heat dispersion that the fan of equal-wattage provides differs greatly.This is mainly the air density difference due to Different Altitude Regions, and the air quantity of the per unit volume that the fan of equal-wattage can be exported in Different Altitude Regions differs greatly.But current fan control strategy only relies on the inlets and putlets of ventilation of electronic equipment or the temperature of electronic device to regulate the rotating speed of fan, and does not consider the impact that air density is brought fan.For this reason, the existing mode of adjusting rotation speed of the fan according to height above sea level comprises: 1) in electronic equipment, set up height above sea level meter and carry out the existing rotation speed of the fan strategy of artificial adjustment and meet the heat radiation requirement of the electronic equipment of high height above sea level according to the shown altitude of height above sea level meter.This mode has increased cost of labor.2) control strategy of fan is set according to the configuration of high height above sea level, to make fan that too much cooling air quantity is provided in low altitude area, the shortcoming of this mode is for the electronic equipment that is positioned at low altitude area, and powerful fan not only increases energy consumption, and noise is large.
Therefore the rotating speed of respective fans, need to improve existing fan control technology, to can be provided based on electronic equipment altitude of living in.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of method and system of controlling rotation speed of the fan, so that the fan being located in the electronic equipment of high altitude localities provides corresponding air output.
For achieving the above object and other relevant objects, the invention provides a kind of system of controlling rotation speed of the fan, described fan is used for to electronic equipment dissipating heat, it comprises: monitoring cell, be used for monitoring described electronic device works environment, comprise: power monitoring module, and be positioned at the intake grill of described electronic equipment and the temperature monitoring module of exhaust outlet, described temperature monitoring module is for monitoring respectively the temperature of described intake grill and exhaust outlet and this temperature being exported; Described power monitoring module is for monitoring the power of described electronic equipment and being exported; Control unit, be connected with described monitoring cell and fan, for receiving the temperature difference of calculating intake grill and exhaust outlet after the described intake grill of described temperature monitoring module output and the temperature of exhaust outlet, and the power of the described electronic equipment of described power monitoring module output, and rotating speed based on described temperature difference, described power and described fan obtains the air density of described electronic equipment environment of living in, and control the rotating speed of described fan based on described air density.
Preferably, described control unit comprises: computing module, obtain the air density of described electronic equipment environment of living in for power and the relation being directly proportional of the air density of described electronic equipment environment of living in and the rotating speed of described fan of the intake grill of the described electronic equipment based on gathered and the temperature difference of exhaust outlet and the relation being inversely proportional to of the air density of described electronic equipment environment of living in, current described electronic equipment; Sub-control module, for the described air density from described computing module and default air density are compared, to determine whether to change the rotating speed of described fan, and in the time determining the described rotation speed of the fan of change, using default air density with the ratio of the described air density calculated as the coefficient that changes described rotation speed of the fan, change rotating speed to control described fan.
Preferably, described computing module also comprises: sub-computing module, for the temperature difference of described electronic equipment inlets and putlets of ventilation based on gathered and the power of current described electronic equipment, utilizes following formula to obtain the air density of described fan environment of living in;
Wherein, ρ is air density;
P is the power of current described electronic equipment;
D is specific heat at constant pressure constant;
V is the air output of described fan;
Ta is the temperature of the exhaust outlet of described electronic equipment;
Tb is the temperature of the intake grill of described electronic equipment.
Based on above-mentioned purpose, the present invention also provides a kind of method of controlling rotation speed of the fan, described fan is for to electronic equipment dissipating heat, and it comprises step: the rotating speed that 1) obtains the fan in the temperature of the intake grill of described electronic equipment, the temperature of exhaust outlet, described electronic equipment current performance number and described electronic equipment; 2) intake grill of the described electronic equipment based on gathered and the temperature of exhaust outlet obtain temperature difference, and rotating speed based on described temperature difference, described power and described fan obtains the air density of described electronic equipment environment of living in, then control the rotating speed of described fan based on described air density.
Preferably, described step 2) comprising: 2-1) power of the intake grill of the described electronic equipment based on gathered and the temperature difference of exhaust outlet and the relation being inversely proportional to of the air density of described electronic equipment environment of living in, current described electronic equipment and the relation being directly proportional of the air density of described fan environment of living in and the rotating speed of described fan are obtained the air density of described electronic equipment environment of living in; 2-2) obtained described air density and default air density are compared, to determine whether to change the rotating speed of described fan, and in the time determining the described rotation speed of the fan of change, using default air density with the ratio of the described air density calculated as the coefficient that changes described rotation speed of the fan, and control described fan and change rotating speed.
Preferably, described step 2-1) also comprise: the temperature difference of described electronic equipment inlets and putlets of ventilation based on gathered and the power of current described electronic equipment, utilize following formula to obtain the air density of described fan environment of living in;
Wherein, ρ is air density;
P is the power of current described electronic equipment;
D is specific heat at constant pressure constant;
V is the air output of described fan;
Ta is the temperature of the exhaust outlet of described electronic equipment;
Tb is the temperature of the intake grill of described electronic equipment.
As mentioned above, a kind of method and system of controlling rotation speed of the fan of the present invention, there is following beneficial effect: the rotating speed that utilizes the rotating speed of the fan in the intake grill of described electronic equipment and the temperature difference of exhaust outlet, described electronic equipment current power and described electronic equipment to control fan calculates the residing air density of described electronic equipment, the air density according to current that can be intelligent is controlled the rotating speed of fan, makes the different problem of fan delivery air amount thereby solved because electronic equipment location altitude is different; In addition, utilize the linear relationship of the current performance number of the temperature difference of inlets and putlets of ventilation of air density, described electronic equipment and described electronic equipment to control the rotating speed of fan, can be according to the adjustment rotation speed of the fan of the altitude intelligence of electronic equipment reality, making fan is better electronic equipment dissipating heat, suits measures to local conditions to solve the energy consumption problem of electronic equipment in different regions.
Brief description of the drawings
Fig. 1 is shown as the structural representation of the system of control rotation speed of the fan of the present invention.
Fig. 2 is shown as the structural representation of a kind of preferred implementation of the system of control rotation speed of the fan of the present invention.
Fig. 3 is shown as the flow chart of the method for control rotation speed of the fan of the present invention.
Fig. 4 is shown as the flow chart of a kind of preferred implementation of the method for control rotation speed of the fan of the present invention.
Element numbers explanation
1 control system
11 monitoring cell
111 temperature monitoring modules
112 power monitoring modules
12 control units
121 computing modules
122 sub-control modules
2 electronic equipments
21 intake grills
22 exhaust outlets
23 fans
S1 ~ S2, S21, S22 step
Embodiment
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification.The present invention can also be implemented or be applied by other different embodiment, and the every details in this specification also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
It should be noted that, the diagram providing in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy and only show with assembly relevant in the present invention in graphic but not component count, shape and size drafting while implementing according to reality, when its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
Fig. 1 is the structural representation of the system of control rotation speed of the fan of the present invention.Described control system 1 is for controlling the rotating speed of fan 23, so that fan 23 can be for electronic equipment 2 provides stable heat sinking function under Different Altitude condition.Described electronic equipment 2 includes but not limited to: server, computer equipment etc.Described control system 1 comprises: monitoring cell 11, control unit 12.
Described monitoring cell 11 is for monitoring the working environment of described electronic equipment 2, and it at least comprises: temperature monitoring module 111, power monitoring module 112.
Described temperature monitoring module 111 is multiple, lays respectively at air intake 21 and the air-out 22 of described electronic equipment 2, for monitoring respectively the temperature of described intake grill 21 and exhaust outlet 22, and this temperature is exported.Wherein, described temperature monitoring module 111 comprises any sensor that can experience temperature and convert usable output signal to.
Described power monitoring module 112 is for monitoring the power of described electronic equipment 2 and being exported.Wherein, described power monitoring module 112 comprises any sensor that can gather described electronic equipment 2 power.Preferably, described power monitoring module 112 comprises the sampling resistor being electrically connected with described electronic equipment 2, and the resistance of the current value gathering based on described sampling resistor and described electronic equipment 2 is determined the current performance number of described electronic equipment 2.
Described control unit 12 is connected with described monitoring cell 11, described fan 23, for receiving the temperature difference of calculating intake grill 21 and exhaust outlet 22 after the temperature of described intake grill 21 that described temperature monitoring module 111 exports and air-out 22, and fan 23 power exported of described power monitoring module 112, and rotating speed based on described temperature difference, described power and described fan 23 obtains the air density of described electronic equipment 2 environment of living in, and control the rotating speed of described fan 23 based on described air density.Wherein, described control unit 12 is obtained the rotating speed of described fan 23 under acquiescence control strategy.
Particularly, as shown in Figure 2, described control unit 12 comprises: computing module 121 and sub-control module 122.
Described computing module 121 is obtained the air density of described electronic equipment 2 environment of living in for the power of the intake grill 21 of the described electronic equipment 2 based on gathered and the temperature difference of exhaust outlet 22 and the relation being inversely proportional to of the air density of described electronic equipment 2 environment of living in, current described electronic equipment 2 and the relation being directly proportional of the air density of described electronic equipment 2 environment of living in and the rotating speed of described fan 23.
Preferably, the temperature difference of described electronic equipment 2 inlets and putlets of ventilation and the power of current described electronic equipment 2 of sub-computing module (not giving diagram) in described computing module 121 based on gathered, utilizes formula (1) to obtain the air density of described fan 23 environment of living in.
Wherein, ρ is air density;
P is the power of current described electronic equipment;
D is specific heat at constant pressure constant (J/kg*K);
V is the air output of described fan;
Ta is the temperature of the exhaust outlet of described electronic equipment;
Tb is the temperature of the intake grill of described electronic equipment.
For example, the temperature that described sub-computing module is obtained the intake grill 21 of gathered described electronic equipment 2 is 15 DEG C, the temperature of exhaust outlet 22 is 30 DEG C, the performance number of described electronic equipment 2 is 500w, and 4500 revolutions per seconds of the revolutions of described fan 23, to obtain the air output of described fan 23 be 0.0346m to the corresponding relation of fan 23 rotating speeds of described sub-computing module based on default and air output
3/ s; Then the air density that, described sub-computing module is obtained described electronic equipment 2 environment of living in based on formula (1) is 0.944kg/m
3.
Described sub-control module 122 is for comparing the described air density from described computing module 121 and default air density, to determine whether to change the rotating speed of described fan 23, and in the time determining described fan 23 rotating speed of change, using default air density with the ratio of the described air density calculated as the coefficient that changes described fan 23 rotating speeds, change rotating speed to control described fan 23.Wherein, described default air density includes but not limited to: the air density (1.18kg/m3) on normal temperature sea level.
It should be noted that, it should be appreciated by those skilled in the art that the described fan 23 of control changes the mode of rotating speed, is not described in detail in this.
Particularly, described sub-control module 122 is compared the described air density from described computing module 121 and default air density, when calculated air density is less than default air density and changes the rotating speed of described fan 23, otherwise, the rotating speed of described fan 23 do not changed; In the time confirming to change described fan 23 rotating speed, described sub-control module 122 using default air density with the ratio of the described air density calculated as the coefficient that changes described fan 23 rotating speeds, again using the product of the rotating speed of default fan 23 and described coefficient as the new rotating speed of described fan 23, and control described fan 23 and change rotating speed.Wherein, the rotating speed of default fan comprises: the rotating speed of described fan under acquiescence control strategy.
For example, the air density 0.944kg/m of described sub-control module 122 based on calculated
3the air density 1.18kg/m that < is default
3, determine and change the rotating speed of described fan 23, then, the ratio of the air density of described sub-control module 122 based on default and the air density of calculating, obtains the coefficient that changes described fan 23 rotating speeds
described sub-control module 122 obtains the rotating speed (4500 revolutions per seconds) of described fan 23 and the product of described coefficient under acquiescence control strategy, the new rotating speed v that obtains described fan 23 is 1.25*4500 revolutions per second, and convert the new rotating speed of described fan 23 to control command, to change the rotating speed of described fan 23 into 5625 revolutions per seconds.
As shown in Figure 3, the present invention also provides a kind of method of controlling rotation speed of the fan.Described method is mainly carried out by described control system, and wherein, described fan is used for to electronic equipment dissipating heat.
In step S1, described control system is obtained the rotating speed of the fan in the temperature of the intake grill of described electronic equipment, the temperature of exhaust outlet, described fan current performance number and described electronic equipment.
Particularly, described control system is obtained corresponding temperature value by the temperature monitoring module that is positioned at described electronic equipment intake grill, exhaust outlet; Described control system is obtained the current performance number of described electronic equipment by the power monitoring module being connected with described electronic equipment; Described control system obtains the rotating speed of described fan under acquiescence control strategy.
Then,, in step S2, the intake grill of the described electronic equipment of described control system based on gathered and the temperature difference of exhaust outlet, the performance number of current described electronic equipment and the rotating speed of described fan are controlled the rotating speed of described fan.
Particularly, as shown in Figure 4, described step S2 also comprises: step S21 and step S22.
In step S21, the relation being inversely proportional to of the air density of the intake grill of the described electronic equipment of described control system based on gathered and the temperature difference of exhaust outlet and described electronic equipment environment of living in, and the power of current described electronic equipment and the relation being directly proportional of the air density of described wind-powered electricity generation subset environment of living in obtain the air density of described electronic equipment environment of living in.
Preferably, the temperature difference of described electronic equipment inlets and putlets of ventilation and the power of current described electronic equipment of described control system based on gathered, utilizes formula (1) to obtain the air density of described fan environment of living in.
For example, the temperature that described control system obtains the intake grill of gathered described electronic equipment is that 15 DEG C, the temperature of exhaust outlet are 30 DEG C, the performance number of described electronic equipment is 500w, and 4500 revolutions per seconds of the revolutions of described fan, to obtain the air output of described fan be 0.0346m to the corresponding relation of the rotation speed of the fan based on default and air output
3/ s; Then the air density that, described control system obtains described electronic equipment environment of living in based on formula (1) is 0.944kg/m
3.
Then, in step S22, described control system is compared obtained air density and default air density, to determine whether to change the rotating speed of described fan, and in the time determining the described rotation speed of the fan of change, using default air density with the ratio of the described air density calculated as the coefficient that changes described rotation speed of the fan, change rotating speed to control described fan.Wherein, described default air density includes but not limited to: the air density (1.18kg/m3) on normal temperature sea level.
It should be noted that, it should be appreciated by those skilled in the art that the described fan 23 of control changes the mode of rotating speed, is not described in detail in this.
Particularly, described control system is compared obtained described air density and default air density, when calculated air density is less than default air density and changes the rotating speed of described fan, otherwise, do not change the rotating speed of described fan; In the time confirming to change described rotation speed of the fan, described control system using default air density with the ratio of the described air density calculated as the coefficient that changes described rotation speed of the fan, again using the product of the rotating speed of default fan and described coefficient as the new rotating speed of described fan, and control described fan and change rotating speed.Wherein, the rotating speed of default fan comprises: the rotating speed of described fan under acquiescence control strategy.
For example, the air density 0.944kg/m of described control system based on calculated
3the air density 1.18kg/m that < is default
3, determine and change the rotating speed of described fan, then, the ratio of the air density of described control system based on default and the air density of calculating, obtains the coefficient that changes described rotation speed of the fan
the product of the rotating speed of the fan of described control system based on default (4500 revolutions per seconds) and described coefficient, the new rotating speed v that obtains described fan is 1.25*4500 revolutions per second, and convert the new rotating speed of described fan to control command, to change the rotating speed of described fan into 5625 revolutions per seconds.
In sum, the method and system of control rotation speed of the fan of the present invention, the rotating speed that utilizes the rotating speed of the fan in the intake grill of described electronic equipment and the temperature difference of exhaust outlet, described electronic equipment current power and described electronic equipment to control fan calculates the residing air density of described electronic equipment, the air density according to current that can be intelligent is controlled the rotating speed of fan, makes the different problem of fan delivery air amount thereby solved because electronic equipment location altitude is different; In addition, utilize the linear relationship of the current performance number of the temperature difference of inlets and putlets of ventilation of air density, described electronic equipment and described electronic equipment to control the rotating speed of fan, can be according to the adjustment rotation speed of the fan of the altitude intelligence of electronic equipment reality, making fan is better electronic equipment dissipating heat, suits measures to local conditions to solve the energy consumption problem of electronic equipment in different regions.So the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (4)
1. control a system for rotation speed of the fan, described fan for to electronic equipment dissipating heat, is characterized in that, at least comprises:
Monitoring cell, be used for monitoring described electronic device works environment, comprise: power monitoring module, and being positioned at the intake grill of described electronic equipment and the temperature monitoring module of exhaust outlet, described temperature monitoring module is for monitoring respectively the temperature of described intake grill and exhaust outlet and this temperature being exported; Described power monitoring module is for monitoring the power of described electronic equipment and being exported;
Control unit, be connected with described monitoring cell and fan, for receiving the temperature difference of calculating intake grill and exhaust outlet after the described intake grill of described temperature monitoring module output and the temperature of exhaust outlet, and the power of the described electronic equipment of described power monitoring module output, and rotating speed based on described temperature difference, described power and described fan obtains the air density of described electronic equipment environment of living in, and control the rotating speed of described fan based on described air density;
Described control unit comprises:
Computing module, obtains the air density of described electronic equipment environment of living in for power and the relation being directly proportional of the air density of described electronic equipment environment of living in and the rotating speed of described fan of the intake grill of the described electronic equipment based on gathered and the temperature difference of exhaust outlet and the relation being inversely proportional to of the air density of described electronic equipment environment of living in, current described electronic equipment;
Sub-control module, for the described air density from described computing module and default air density are compared, to determine whether to change the rotating speed of described fan, and in the time determining the described rotation speed of the fan of change, using default air density with the ratio of the described air density calculated as the coefficient that changes described rotation speed of the fan, change rotating speed to control described fan.
2. the system of control rotation speed of the fan according to claim 1, is characterized in that, described computing module also comprises:
Sub-computing module, for the temperature difference of described electronic equipment inlets and putlets of ventilation based on gathered and the power of current described electronic equipment, utilizes following formula to obtain the air density of described fan environment of living in;
Wherein, ρ is air density;
P is the power of current described electronic equipment;
D is specific heat at constant pressure constant;
V is the air output of described fan;
Ta is the temperature of the exhaust outlet of described electronic equipment;
Tb is the temperature of the intake grill of described electronic equipment.
3. control a method for rotation speed of the fan, described fan for to electronic equipment dissipating heat, is characterized in that, comprises step:
1) obtain the rotating speed of the fan in the temperature of the intake grill of described electronic equipment, the temperature of exhaust outlet, described electronic equipment current performance number and described electronic equipment;
2) intake grill of the described electronic equipment based on gathered and the temperature of exhaust outlet obtain temperature difference, and rotating speed based on described temperature difference, described power and described fan obtains the air density of described electronic equipment environment of living in, then control the rotating speed of described fan based on described air density;
Described step 2) comprising:
2-1) power of the intake grill of the described electronic equipment based on gathered and the temperature difference of exhaust outlet and the relation being inversely proportional to of the air density of described electronic equipment environment of living in, current described electronic equipment and the relation being directly proportional of the air density of described fan environment of living in and the rotating speed of described fan are obtained the air density of described electronic equipment environment of living in;
2-2) obtained described air density and default air density are compared, to determine whether to change the rotating speed of described fan, and in the time determining the described rotation speed of the fan of change, using default air density with the ratio of the described air density calculated as the coefficient that changes described rotation speed of the fan, and control described fan and change rotating speed.
4. the method for control rotation speed of the fan according to claim 3, is characterized in that, described step 2-1) also comprise:
The temperature difference of described electronic equipment inlets and putlets of ventilation based on gathered and the power of current described electronic equipment, utilize following formula to obtain the air density of described fan environment of living in;
Wherein, ρ is air density;
P is the power of current described electronic equipment;
D is specific heat at constant pressure constant;
V is the air output of described fan;
Ta is the temperature of the exhaust outlet of described electronic equipment;
Tb is the temperature of the intake grill of described electronic equipment.
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| CN201210315733.5A CN102808796B (en) | 2012-08-30 | 2012-08-30 | Method and system for controlling rotating speed of fan |
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|---|---|---|---|
| CN201210315733.5A CN102808796B (en) | 2012-08-30 | 2012-08-30 | Method and system for controlling rotating speed of fan |
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| CN102808796B true CN102808796B (en) | 2014-11-26 |
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| CN103968805B (en) * | 2014-06-04 | 2017-02-15 | 郑州云海信息技术有限公司 | Method for testing and correcting altitude for working of server by virtue of back pressure of fan |
| CN103983244B (en) * | 2014-06-04 | 2018-01-16 | 浪潮电子信息产业股份有限公司 | A kind of method using fan performance changing rule calculation server height above sea level |
| CN105526183B (en) * | 2014-09-30 | 2017-07-25 | 联想(北京)有限公司 | A kind of method and device of control rotation speed of the fan |
| CN105828577B (en) * | 2016-03-28 | 2019-03-08 | 联想(北京)有限公司 | Electronic equipment and its control method |
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| CN108095385B (en) * | 2017-12-28 | 2020-09-18 | 江西万橡家具集团有限公司 | A official working device in coordination for business administration consultation |
| CN109917883A (en) * | 2019-03-12 | 2019-06-21 | 苏州浪潮智能科技有限公司 | A kind of server and its fan control system |
| CN110012649B (en) * | 2019-05-08 | 2020-12-04 | 苏州浪潮智能科技有限公司 | Power supply heat dissipation control method and system |
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