CN107725450A - A kind of blower control method, system and the electric equipment with cooling fan - Google Patents
A kind of blower control method, system and the electric equipment with cooling fan Download PDFInfo
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- CN107725450A CN107725450A CN201610656270.7A CN201610656270A CN107725450A CN 107725450 A CN107725450 A CN 107725450A CN 201610656270 A CN201610656270 A CN 201610656270A CN 107725450 A CN107725450 A CN 107725450A
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- Prior art keywords
- blower fan
- rotating speed
- temperature
- input voltage
- speed
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/01—Purpose of the control system
- F05D2270/02—Purpose of the control system to control rotational speed (n)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/303—Temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The present invention relates to a kind of blower control method, system and electric equipment with cooling fan, methods described includes：Gather blower fan input voltage；Treatment Analysis generation speed regulating control signal is carried out to blower fan input voltage；Blower fan work state is controlled according to speed regulating control signal, adjusts its rotating speed.The present invention can both make blower fan low noise low-speed running under electrical equipment lower calorific value working condition, and blower fan can also be made to be run at high speed under electrical equipment golf calorific value working condition and ensure that noise meets product demand.
Description
Technical field
The present invention relates to air-blower control field, more particularly to a kind of blower control method, system and with cooling fan
Electric equipment.
Background technology
At present in the Air Blower Control Scheme of the electric type product with radiator fan, typically most of is at its specified turn
Directly control operating, is also partly to adjust rotation speed of fan by software control merely in fast scope, the blower fan of such scheme
Operating can not reflect the actual radiating requirements of Electric appliance hardware, also be not carried out the optimal noise shape on the premise of temperature rise is ensured
State, it is a kind of rough radiation processes of passive type.
For self-heating amount and few circuit board or electrical work are in lower calorific value state, in real work
The radiating requirements of device need to only be met in journey, and do not need blower fan persistently to run at high speed.On the one hand the blower fan to run at high speed
Noise can be bigger, and also there is certain influence in the life-span that another aspect blower fan persistently runs at high speed for its driving chip.
Software design patterns fan speed regulation is used merely, the control to rotating speed is simply depending on the setting by programming people, it is impossible to anti-in real time
The temperature rise demand of electrical equipment intraluminal device in practical work process is reflected, preferable noise state can not be obtained.
In practical application, enable to blower fan according to the actual demand adjust automatically rotating speed in circuit board or electrical equipment and herein
On the basis of obtain minimum noise be necessary.
The content of the invention
The technical problems to be solved by the invention are in view of the shortcomings of the prior art, there is provided a kind of blower control method, are
System and the electric equipment with cooling fan.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of blower fan control system, including：
Temperature sensing device, the temperature sensing device are connected between blower voltage input and power supply, and are laid in weight in electrical equipment
Want device nearby or electrical equipment in weak heat-dissipating region, for perceiving the temperature change of local environment, the resistance of the temperature sensing device
Vary with temperature and change；
Voltage detection module, it is connected with blower voltage input, for gathering blower fan input voltage；
Main control module, it is connected with voltage detection module and fan control module, to blower fan input voltage
Reason analysis, speed regulating control signal transmission fan is generated with the corresponding relation of test rotating speed and rotating speed of target according to prestoring
Control module；
Fan control module, it is connected with main control module and blower fan, for controlling blower fan work according to speed regulating control signal
State, adjust its rotating speed.
The beneficial effects of the invention are as follows：Comprehensive considering various effects of the present invention, by the actual demand of circuit hardware and software
Coordinated regulation is combined, and is a kind of based on temperature rise radiating state, for the purpose of noise reduction, is varied with temperature active control blower fan
The scheme of rotating speed, circuit is simple, and software scenario, without particular requirement, may be directly applied to using DC fan to control chip
In circuit board arrangements.Both blower fan low noise low-speed running under electrical equipment lower calorific value working condition can have been made, blower fan can also be made
Run at high speed under electrical equipment golf calorific value working condition and ensure that noise meets product demand, be the low noise based on actual temperature rise
Sound is the Air Blower Control Scheme of target.Low speed during low temperature, real-time change, ensure service life of fan during high temperature at a high speed.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the temperature sensing device includes the resistive temperature sensing device or temperature sensor of negative sense.
It is using the above-mentioned further beneficial effect of scheme：Temperature sensing device and fans in series, temperature sensing device have with temperature
The characteristic that diminishes of degree rise resistance, become for experiencing the temperature change of device on circuit board and the environment temperature in electric apparatus chamber body
Change, this change in resistance can cause blower fan input voltage that opposite change (blower fan input voltage and its partial pressure) occurs, in blower fan
Driving chip can operating voltage range inner blower rotating speed can with input voltage occur consecutive variations, input voltage hour rotating speed
It is low, when input voltage is high rotating speed it is high, it is necessary to according to blower fan driving chip can operating voltage range selection temperature variation characteristic symbol
The temperature sensing device of conjunction.Temperature change is converted to voltage change by the present invention according to the above-mentioned characteristic of temperature sensing device, and then is converted to
Rotation speed of fan changes, and ensures that rotation speed of fan can be with temperature real-time change.
Further, the main control module includes：Memory cell, meet temperature-sensitive device temperature for what storage pre-established
First corresponding relation of blower fan input voltage and test rotating speed under the conditions of characteristic, and what is pre-established meet temperature-sensitive device temperature
Different blower fan input voltage sections and default noise section and the second corresponding relation of rotating speed of target under the conditions of characteristic.
It is using the above-mentioned further beneficial effect of scheme：Temperature sensing device temperature of the present invention to determine according to the actual requirements
Based on characteristic curve, release the temperature sensing device it is corresponding under blower voltage and rotation speed of fan respective function relation, establish the
One corresponding relation, and the corresponding relation of rotation speed of fan and noise under the temperature sensing device is measured according to experiment, pass through experiment test
The blower fan demand rotating speed target corresponding relation that default noise result is the upper limit is drawn, foundation meets temperature-sensitive device temperature characteristic condition
Lower different blower fan input voltage sections and default noise section and the second corresponding relation of rotating speed of target；Examined in voltage detection module
In the case of surveying blower fan input voltage, the rotating speed of target under the state can be quickly drawn.
Further, the main control module also includes：
Matching unit, for testing rotating speed according to corresponding to the first corresponding relation acquisition blower fan input voltage, according to
Second corresponding relation obtains rotating speed of target corresponding to the blower fan input voltage；
Computing unit, for calculating the difference status of test rotating speed and rotating speed of target, and speed governing is determined according to difference status
Scheme；
Signal generation unit, fan control module is sent to for producing speed regulating control signal according to speed-regulating scheme.
It is using the above-mentioned further beneficial effect of scheme：Quickly drawn using the first corresponding relation and the second corresponding relation
It is corresponding with the blower fan input voltage of collection to test rotating speed and rotating speed of target, determine to adjust according to the difference of test rotating speed and rotating speed of target
Fast scheme, and speed regulating control signal is produced, and rotation speed of fan is adjusted to rotating speed of target, corresponding fan speed regulation signal is exported, with
Just the operation to blower fan is controlled.
Further, the main control module also includes：
Voltage change ratio acquiring unit, the blower fan input voltage for being gathered according to voltage detection module obtain blower fan input
Voltage change ratio；
Comparing unit, for the voltage change drawn by blower fan input voltage rate of change and according to temperature sensing device temperature profile
Rate is compared, and draws difference value；
Control unit, for when difference value within a preset range when, be determined as normal condition, carry out at normal speed governing
Reason；When difference value not within a preset range when, be determined as abnormality, if single discrepancy then abandons processing, with next
Speed governing processing is done based on section normal data, is determined as temperature sensing device exception if continuously there is discrepancy, carries out the processing that reports an error,
Remind detection temperature sensing device.
It is using the above-mentioned further beneficial effect of scheme：It can be monitored and collection voltages data in voltage detection module
Voltage change ratio is obtained simultaneously, the preferential data for determining collection whether there is abnormity point, and in the case where being carried out in time after noting abnormalities
One step abnormality processing, the later stage is avoided to obtain the speed-regulating signal of mistake to dealing of abnormal data.
For achieving the above object, the present invention also provides a kind of electric equipment with cooling fan, including above-mentioned skill
Blower fan control system described in art scheme.
The beneficial effects of the invention are as follows：Include the electric equipment of above-mentioned blower fan control system, blower fan can be achieved according to radiating
While demand is operated, noise requirements are taken into account.Temperature increase requirement can be met, and can carries out noise reduction for the different temperatures stage
Processing, is the blower fan noise reduction control program premised on device requirement.Low-speed running during low temperature, run at high speed during high temperature, and reach
To default noise result, real-time change, ensure service life of fan, reduce maintenance of equipment cost.
For achieving the above object, the present invention also provides a kind of blower control method, applied in blower fan control system,
The blower fan control system includes temperature sensing device, voltage detection module, main control module and fan control module, the temperature detector
Part is connected between blower voltage input and power supply, and is laid in the area of the weak heat-dissipating nearby or in electrical equipment of important devices in electrical equipment
Domain, for perceiving the temperature change of local environment, the resistance of the temperature sensing device is varied with temperature and changed, and methods described includes
Following steps：
S1, gather blower fan input voltage；
S2, to blower fan input voltage progress Treatment Analysis, according to prestore and pair of test rotating speed and rotating speed of target
Generation speed regulating control signal should be related to；
S3, blower fan work state is controlled according to speed regulating control signal, adjusts its rotating speed.
The beneficial effects of the invention are as follows：Temperature sensing device temperature characterisitic is converted to blower fan input electricity by the method for the invention
Pressure, and then the test rotating speed of corresponding blower fan input voltage is obtained, further according to the default noise limitation acquisition pair of different voltage stages
Should before rotating speed of target under voltage status, and current rotating speed is adjusted to close to rotating speed of target to realize that low noise is run.Realize both
Temperature increase requirement can be met, and can carries out noise reduction process for the different temperatures stage, is the blower fan noise reduction premised on device requirement
Control program.Low speed during low temperature, real-time change, ensure service life of fan during high temperature at a high speed.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, what storage pre-established before above-mentioned technical proposal also includes step S1 meets temperature-sensitive device temperature characteristic
Under the conditions of blower fan input voltage and test rotating speed the first corresponding relation, and what is pre-established meet temperature-sensitive device temperature characteristic
Under the conditions of the second corresponding relation of different blower fan input voltage sections and default noise section and rotating speed of target.
Further, S2 specific implementation includes:
S2.1, rotating speed is tested according to corresponding to the first corresponding relation obtains the blower fan input voltage, according to the second correspondence
Rotating speed of target corresponding to blower fan input voltage described in Relation acquisition；
S2.2, calculates the difference status of test rotating speed and rotating speed of target, and determines speed-regulating scheme according to difference status；
S2.3, speed regulating control signal is produced according to speed-regulating scheme and is sent to fan control module.
Further, also include before performing S2:
Blower fan input voltage rate of change is obtained according to the blower fan input voltage of collection；
By blower fan input voltage rate of change compared with the voltage change ratio drawn according to temperature sensing device temperature profile, obtain
Go out difference value；
When difference value within a preset range when, be determined as normal condition, carry out normal speed governing processing；When difference value does not exist
When in preset range, it is determined as abnormality, if single discrepancy then abandons a processing, based on next section of normal data
Speed governing processing is done, is determined as temperature sensing device exception if continuously there is discrepancy, carries out the processing that reports an error, reminds detection temperature detector
Part.
Brief description of the drawings
Fig. 1 is blower fan control system block diagram described in the embodiment of the present invention；
Fig. 2 is blower fan control system physical circuit figure described in the embodiment of the present invention；
Fig. 3 is blower control method flow chart of the embodiment of the present invention.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
As shown in figure 1, the present invention provides a kind of blower fan control system, including：
Temperature sensing device, the temperature sensing device are connected between blower voltage input and power supply, and are laid in weight in electrical equipment
Want device nearby or electrical equipment in weak heat-dissipating region, for perceiving the temperature change of local environment, the resistance of the temperature sensing device
Vary with temperature and change；
Voltage detection module, it is connected with blower voltage input, for gathering blower fan input voltage；
Main control module, it is connected with voltage detection module and fan control module, to blower fan input voltage
Reason analysis, speed regulating control signal transmission fan is generated with the corresponding relation of test rotating speed and rotating speed of target according to prestoring
Control module；
Fan control module, it is connected with main control module and blower fan, for controlling blower fan work according to speed regulating control signal
State, adjust its rotating speed.
Present system is simple in construction, and hardware foundation is basic sampling and control circuit.As shown in Fig. 2 blower fan accesses
Port FAN082 is blower fan socket, for being connected with blower fan；TR081 is the resistive temperature sensing device or senser element of negative sense, with
Temperature rise resistance can diminish, and become for experiencing the temperature change of device on circuit board and the environment temperature in electric apparatus chamber body
Change, this change in resistance can cause blower fan input voltage that opposite change (blower fan input voltage and its partial pressure) occurs, in blower fan
Driving chip can operating voltage range inner blower rotating speed can with input voltage occur consecutive variations, input voltage hour rotating speed
It is low, when input voltage is high rotating speed it is high, it is necessary to according to blower fan driving chip can operating voltage range selection temperature variation characteristic symbol
The temperature sensing device of conjunction.
Whole blower fan control system includes following components：1. temperature sensing device, is responsible for monitoring devices or cavity temperature becomes
Change；2. voltage detection module, is responsible for feedback data, monitoring rotating speed collaboration main control module changes fan condition；3. master control molding
Block, the detection data acquisition sent according to voltage detection module test rotating speed and rotating speed of target, and adjustment rotation speed of fan is close to target
Rotating speed, 4. fan control modules, the rotation speed of fan signal control blower fan operating exported according to main control module.
Main operational principle is made up of two parts, hardware sensing part and software control part.Negative sense sense in the course of work
The resistance of warm resistive elements can change with temperature negative sense, and its higher resistance of temperature is smaller, and its both end voltage is smaller, blower fan input electricity
Pressure with its partial pressure, influenceed by its change, important heating device temperature rise or electrical equipment cavity temperature rise when, blower fan it is defeated
Enter that voltage is then bigger, the rotating speed of blower fan then also can be bigger.This is the hardware foundation in this control program.It is more crucial on hardware
It is the selection suitable temperature sensing device of temperature characterisitic, this just needs the specification for considering blower fan driving chip, and the wind that product needs
The machine range of speeds.But the control on the basis of this controls for pure ardware feature, does not account for rotation speed of fan in the process
Stability and fan noise, it can only ensure that rotation speed of fan can be with device temperature real-time change, this is not optimal makes an uproar
Sound-like state.To reach preferable blower fan work state, also to increase the Collaborative Control of software, noise and stability are adjusted
It is whole, on the premise of temperature rise is ensured, the fan noise under different electrical work states is adjusted to minimum.
Therefore the emphasis in noise reduction control program, still on software, hardware is the feedback of its demand.Software control needs to tie
Close the data of hardware testing and the need state of product.The function and corresponding relation being related in software scenario are with actual survey
Examination data is support, it is necessary to carry out many experiments obtaining, and the property fitting for combining practical devices obtains.To ensure that program is set
The reliability put, it can come by the simulation and continuous result verification of many experiments perfect.
1. according to the relation and rotation speed of fan of temperature sensing device resistance and voltage and the pass of voltage on the basis of hardware circuit
System, based on resistive temperature sensing device (or senser element) temperature characteristics of the negative sense determined according to the actual requirements, release
The respective function relation of blower voltage and rotation speed of fan under the temperature sensing device is corresponding, establishes the first corresponding relation.
Blower fan is directly connected on dc source, and the input voltage by adjusting blower fan can be found that the rotating speed of blower fan is with defeated
It is continually changing to enter voltage, the corresponding rotating speed of each magnitude of voltage, changing rule is the rotating speed increasing with input voltage increase
Greatly.
The rotating speed of this blower fan is found out first with the variation relation of input voltage, is tested by many experiments, multi-sample point,
A kind of function changing relation can be obtained, (this functional relation writes into program to difference, makees because of blower interior driving chip difference
For fan test rotating speed)；
Then suitable temperature sensing device is selected, during finding temperature sensing device with electrical work, temperature change and voltage
Relation, this be it is fixed, it is different because temperature sensing device temperature characterisitic in itself is different.It is input to the electricity of air-blower control branch road
Pressure is fixed, and can releases a relation of blower fan input voltage and temperature after temperature sensing device partial pressure, that is to say, that
Obtain voltage change curve of the blower fan during electrical work.For example it is 3-18V.
This voltage change curve has a constant interval, and this constant interval is in the wind obtained by step 1 certainly
In the range of machine rotating speed is with voltage change, be equivalent to obtain one kind this when in electrical work, the rotating speed of blower fan with
One corresponding relation of voltage change.Citing 3-18V corresponds to rotating speed 1000-2800 and turned.
2. on the basis of being controlled without software by blower fan inside the electrical structure in, draw in selected temperature sensing device shadow
Ring the actual corresponding relation of lower rotation speed of fan and noise.
It is variant with being placed on the noise result tested in electrical structure that blower fan is individually taken out to the noise result of test, one
As be that effect is more weaker in electrical structure.Citing, individually take fan test noise to obtain and surveyed in the range of voltage range 3-18V
Examination is 33-51dB in 30-48dB, the noise in Electric Apparatus Chassis, and their noises are different, but their rotating speeds are identicals.
3. product noise demand and temperature rise demand are directed to, on the basis of the actual corresponding relation of rotation speed of fan and noise, with
Ensure stage by stage to be defined criteria for noise premised on temperature rise, the wind that default noise result is the upper limit is drawn by experiment test
Machine demand rotating speed target, the different phase for the sampled voltage established under default noise state and the second couple of blower fan rotating speed of target
It should be related to.
Each product has the noise state of a target, by blower fan on electrical structure, so relatively its work
When noise state, rotation speed of fan is limited by target noise state.Lift a simply example, it is assumed that some product can connect
The noise range received is 30-40dB, but the noise state for voluntarily adjusting voltage to obtain by temperature sensing device merely is 33-51dB,
Just want to adjust present noise state to preferable noise state, that is just further reduced in the range of device temperature rise permission
Rotating speed, illustrate and the change of blower voltage is divided into five sections, it is assumed that voltage changes to 18V from 3V, and voltage is divided into 5 areas
Between, 3V-6V, 6V-9V, 9V-12V, 12V-15V, 15V-18V, (thinner section should be divided during practical application, that divides is thinner, that
Final effect is better) in this five sections, enter the test of Row noise state, obtain in this five sections and meet target noise
(actually five sections also correspond to five noise sections to five kinds of optimal rotary regimes, basis of illustrating in the range of state 30-40dB
Virtual voltage combination noise state demarcation 5 noise sections 30-32,32-34,34-36,36-38,38-40), voltage range
Corresponding noise section determines the rotating speed of target in five sections.(test target rotating speed is also carried out blower fan in Electric Apparatus Chassis, most
Good is exactly to refine separate interval, accomplishes mono- rotating speed of target of 1V, the rotating speed of target in each section also writes into program, with voltage zone
Between it is corresponding).
In electrical equipment real work, the input voltage of blower fan is consecutive variations, understands its work shape by voltage sampling
State, citing, or 5 interval values of setting, are gone to monitor its variation with temperature state by voltage detection module, compare to determine mesh
Which interval value preceding voltage is located in the range of, when voltage is located in one of section, (it that his target velocity is to determine
Preceding experiment determines several rotating speed of target according to the noise range of setting), then just present rotating speed is adjusted, passes through wind
Machine control module controls it to open the time of shut-off to be adjusted to close to rotating speed of target, reaches the effect for reducing noise.Citing, when
When blower voltage is 10V, its actual speed is 1800 turns, it is desirable to which the noise state of acquisition is 34-36dB, and rotating speed of target is 1600
Meet, then turn-off time adjustment is just opened by control, for example opens 80ms, 10ms states is closed and carries out that 1600 turns can be obtained.
This adjustment relation can obtain 1600/1800=8/9 by testing the ratio of rotating speed and rotating speed of target.
4. based on the sampling to blower fan input voltage, actual rotation speed of fan is converted into by process 1, and find the shape
State can correspond to the rotating speed of target of conversion.Judge it is to be directly entered by the difference of voltage change ratio and temperature sensing device temperature characteristics
Speed governing state still does unusual determination processing.
The input voltage value obtained by detecting obtains fan test rotating speed, while confirms the voltage range of its work, and
The target fan rotating speed in this section is further confirmed that.Adjustment is obtained by the ratio of fan test rotating speed and rotating speed of target to close
System, rotating speed of target is adjusted to by adjustment relation by existing rotating speed.
5. software regulation and control noise reduction is to ensure hardware premised on it is using radiating good in specification, therefore all softwares are joined
Several settings will starting point based on this.
6. hardware plan determines the basic variation tendency of rotation speed of fan, software regulation and control ensure that its variation tendency meets actual drop
Make an uproar demand.
The temperature sensor that the temperature sensing device includes the resistive temperature sensing device of negative sense or resistance varies with temperature.This hair
Temperature sensing device described in bright embodiment uses negative sense temperature-sensitive resistive elements TR081.By the temperature sensing device preferably when fabric swatch
Cloth is near important heating device or is affected by temperature near bigger device, so that it can be sensitive and accurately experiences
The change of the temperature change of the device or its ambient temperature, guarantee to feed back shape in time in device or cavity temperature rise
State.
The voltage detection module includes resistance R082, resistance R083, electric capacity EC082, resistance R084, electric capacity C081 and two
Pole pipe D082, the resistance R082 and resistance R083 are connected between blower fan access port and ground, the resistance R082 and resistance
R083 common port connection electric capacity EC082 positive pole and resistance R084 one end, the negative pole ground connection of the electric capacity EC082 are described
Resistance R084 other end connection electric capacity C081 one end and diode D082 positive pole, and connect the input of main control module
End, the other end ground connection of the electric capacity C081, the negative pole connection power vd D of the diode D082.Above-mentioned voltage detection module
Only a kind of implementation, other implementations of voltage detecting can be achieved also within the scope of the present invention.
The fan control module includes resistance R081, triode Q28, diode D081 and electric capacity EC081, the resistance
The output end of R081 one end connection main control module, other end connecting triode Q28 base stage, the hair of the triode Q28
Emitter grounding, colelctor electrode connect No. 2 of diode D081 positive pole, electric capacity EC081 negative pole and blower fan access interface FAN082
Pin, the positive pole connecting fan access interface FAN082 of the diode D081 negative poles and electric capacity EC081 No. 1 pin, and
Connect negative sense temperature-sensitive resistive elements TR081 one end, the other end connection power supply VCC of the negative sense temperature-sensitive resistive elements TR081.
Above-mentioned fan control module is only a kind of implementation, and other implementations that air-blower control can be achieved also protect model in the present invention
Within enclosing.
The break-make of blower fan is performed by chip controls triode Q28 shut-off of opening.The data feedback of blower fan work state is then
Chip is fed back to by voltage detection module, so as to understand the rotating speed of blower fan in real time and limit blower fan not by fan control module
With the working condition in stage to ensure its noise in the electrical equipment different operating stage.Ensure that blower fan can operate in controllable scope
It is interior, the exception during blower fan work can be also monitored by the data to Voltage Feedback.
In the embodiment of the present invention, the main control module includes：Memory cell, meet temperature-sensitive for what storage pre-established
First corresponding relation of blower fan input voltage and test rotating speed under the conditions of device temperature characteristic, and what is pre-established meet temperature-sensitive
Different blower fan input voltage sections and default noise section and the second corresponding relation of rotating speed of target under the conditions of device temperature characteristic；
The main control module also includes：Matching unit, corresponding to obtaining the blower fan input voltage according to the first corresponding relation
Rotating speed is tested, the rotating speed of target according to corresponding to the second corresponding relation obtains the blower fan input voltage；Computing unit, for calculating
The difference status of rotating speed and rotating speed of target is tested, and speed-regulating scheme is determined according to difference status；Signal generation unit, for basis
Speed-regulating scheme produces speed regulating control signal and is sent to fan control module.
In the embodiment of the present invention, the main control module also includes：Voltage change ratio acquiring unit, for being examined according to voltage
The blower fan input voltage for surveying module collection obtains blower fan input voltage rate of change；Comparing unit, for blower fan input voltage to be become
Rate draws difference value compared with the voltage change ratio drawn according to temperature sensing device temperature profile；Control unit, for working as
Difference value within a preset range when, be determined as normal condition, carry out normal speed governing processing；When difference value not within a preset range
When, it is determined as abnormality, if single discrepancy then abandons a processing, is done based on next section of normal data at speed governing
Reason, it is determined as temperature sensing device exception if continuously there is discrepancy, carries out the processing that reports an error, reminds detection temperature sensing device.
To realize goal of the invention, the present invention also provides a kind of electric equipment with cooling fan, including above-mentioned technical side
Blower fan control system described in case.
As shown in figure 3, to realize goal of the invention, the present invention also provides a kind of blower control method, applied to air-blower control
In system, the blower fan control system includes temperature sensing device, voltage detection module, main control module and fan control module, institute
State temperature sensing device to be connected between blower voltage input and power supply, and be laid in important devices in electrical equipment and nearby or in electrical equipment dissipate
The region of heat differential, for perceiving the temperature change of local environment, the resistance of the temperature sensing device is varied with temperature and changed, described
Method comprises the following steps：
S1, gather blower fan input voltage；
S2, to blower fan input voltage progress Treatment Analysis, according to prestore and pair of test rotating speed and rotating speed of target
Generation speed regulating control signal should be related to；
S3, blower fan work state is controlled according to speed regulating control signal, adjusts its rotating speed.
The temperature sensor that the temperature sensing device includes the resistive temperature sensing device of negative sense or resistance varies with temperature.This hair
Temperature sensing device described in bright embodiment uses negative sense temperature-sensitive resistive elements TR081.
In the embodiment of the present invention in advance in main control chip storage pre-establish meet temperature-sensitive device temperature characteristic condition
First corresponding relation of lower blower fan input voltage and test rotating speed, and what is pre-established meet temperature-sensitive device temperature characteristic condition
Lower different blower fan input voltage sections and default noise section and the second corresponding relation of rotating speed of target.
S2 specific implementation includes:
S2.1, rotating speed is tested according to corresponding to the first corresponding relation obtains the blower fan input voltage, according to the second correspondence
Rotating speed of target corresponding to blower fan input voltage described in Relation acquisition；
S2.2, calculates the difference status of test rotating speed and rotating speed of target, and determines speed-regulating scheme according to difference status；This hair
The speed-regulating signal opened with control based on the turn-off time obtained is calculated in bright embodiment according to rotating speed of target and test rotating speed to pass
Blower fan is given, and then controls fan speed regulation；
S2.3, speed regulating control signal is produced according to speed-regulating scheme and is sent to fan control module.
In the embodiment of the present invention, also include before performing S2：Blower fan input voltage is obtained according to the blower fan input voltage of collection
Rate of change；By blower fan input voltage rate of change compared with the voltage change ratio drawn according to temperature sensing device temperature profile, obtain
Go out difference value；When difference value within a preset range when, be determined as normal condition, carry out normal speed governing processing；When difference value not
When within a preset range, it is determined as abnormality, if single discrepancy then abandons a processing, using next section of normal data as base
Plinth does speed governing processing, is determined as temperature sensing device exception if continuously there is discrepancy, carries out the processing that reports an error, and reminds detection temperature detector
Part.
Pattern commonly used in the prior art is that directly control blower fan runs at high speed under the rated voltage of blower fan work, or
Reduction of speed processing is directly carried out by software.Above scheme is simply doing the radiating treatment of basic guarantee temperature rise, does not consider
Demand of the actual temperature rise change of electrical part in the course of the work for rotation speed of fan.
The main operational principle of this programme is to make use of temperature sensing device with the feature of temperature real-time change temperature can be selected to become
Change suitable characteristic and the resistive temperature sensing device of the suitable negative sense of resistance and blower fan carries out partial pressure to be adjusted in real time according to temperature macroscopic view
Control rotation speed of fan simultaneously reflects need state.To ensure blower fan in the noise level of different phase, it is necessary to will by software regulation and control
Rotation speed of fan is constantly adjusted to the rotation speed of fan of desirable Noise demand, to ensure that blower fan enters ideal operation state.For
Avoid exception, while rate of change to blower fan input voltage and the corresponding relation of the temperature characteristics of temperature sensing device are supervised
Control, rate of change normally then enters next step speed governing and handled, if monitoring surge abnormity point, then abandons a processing with subsequent period
Gathered data carry out speed governing, if monitoring continuous abnormal point, then whether the prompting detection temperature sensing device that reports an error abnormal.
This programme can meet temperature increase requirement, and and can carries out noise reduction process for the different temperatures stage, is with device requirement
Premised on blower fan noise reduction control program.
The invention provides consider based on a kind of important devices in practical work process or the temperature in electric apparatus chamber
Adjustment rotating speed reduce fan noise control program.Program software and hardware is combined, with basic sampling and control circuit
Based on, with reference to software noise reduction process scheme, it is not only based on device temperature rise change but also for the purpose of noise demand, will bears
Blower voltage and rotary speed property are converted into resistive electrical part characteristic, using the demand of desirable Noise and rotating speed as limit value, by soft
Rotation speed of fan is adjusted to close to preferable state by part control.When temperature is low blower fan can low noise microrunning, temperature Gao Shifeng
Then fast turn-around cools machine.On the premise of it can ensure basic radiating, during whole electrical work, the rotating speed of blower fan be with
Premised on noise demand, follow temperature consecutive variations, be it is a kind of with actual demand come the active temperature-fall period that controls.
The present invention is to be monitored with blower fan input voltage parameter to obtain the scheme of rotation speed of fan, to other work of blower fan
Parameter is monitored to obtain the scheme of rotation speed of fan also within the scope of the present invention.
In the description of this specification, reference term " embodiment one ", " example ", " specific example " or " some examples "
Deng description mean to combine specific method, device or feature that the embodiment or example describe and be contained at least the one of the present invention
In individual embodiment or example.In this manual, identical implementation is necessarily directed to the schematic representation of above-mentioned term
Example or example.Moreover, specific features, method, apparatus or the feature of description can be in any one or more embodiments or examples
In combine in an appropriate manner.In addition, in the case of not conflicting, those skilled in the art can be by this specification
The different embodiments or example and the feature of different embodiments or example of description are combined and combined.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
- A kind of 1. blower fan control system, it is characterised in that including：Temperature sensing device, the temperature sensing device are connected between blower voltage input and power supply, and are laid in important device in electrical equipment Part nearby or electrical equipment in weak heat-dissipating region, for perceiving the temperature change of local environment, the resistance of the temperature sensing device is with temperature Degree changes and changed；Voltage detection module, it is connected with blower voltage input, for gathering blower fan input voltage；Main control module, it is connected with voltage detection module and fan control module, for carrying out processing point to blower fan input voltage Analysis, air-blower control is sent to the corresponding relation of test rotating speed and rotating speed of target generation speed regulating control signal according to prestoring Module；Fan control module, it is connected with main control module and blower fan, for controlling blower fan work state according to speed regulating control signal, Adjust its rotating speed.
- 2. blower fan control system according to claim 1, it is characterised in that the temperature sensing device includes the resistive sense of negative sense Warm device or temperature sensor.
- 3. blower fan control system according to claim 1, it is characterised in that the main control module includes：Memory cell, for storing blower fan input voltage and the test turn under the conditions of meeting temperature-sensitive device temperature characteristic that pre-establish First corresponding relation of speed, and the different blower fan input voltage sections under the conditions of meeting temperature-sensitive device temperature characteristic pre-established With default noise section and the second corresponding relation of rotating speed of target.
- 4. blower fan control system according to claim 3, it is characterised in that the main control module also includes：Matching unit, for testing rotating speed according to corresponding to the first corresponding relation acquisition blower fan input voltage, according to second Corresponding relation obtains rotating speed of target corresponding to the blower fan input voltage；Computing unit, for calculating the difference status of test rotating speed and rotating speed of target, and speed-regulating scheme is determined according to difference status；Signal generation unit, fan control module is sent to for producing speed regulating control signal according to speed-regulating scheme.
- 5. blower fan control system according to claim 4, it is characterised in that the main control module also includes：Voltage change ratio acquiring unit, the blower fan input voltage for being gathered according to voltage detection module obtain blower fan input voltage Rate of change；Comparing unit, for blower fan input voltage rate of change to be entered with the voltage change ratio drawn according to temperature sensing device temperature profile Row compares, and draws difference value；Control unit, for when difference value within a preset range when, be determined as normal condition, carry out normal speed governing processing；When Difference value not within a preset range when, be determined as abnormality, it is normal with next section if single discrepancy then abandons processing Speed governing processing is done based on data, is determined as temperature sensing device exception if continuously there is discrepancy, carries out the processing that reports an error, remind inspection Survey temperature sensing device.
- 6. a kind of electric equipment with cooling fan, it is characterised in that including the blower fan control described in claim any one of 1-5 System processed.
- 7. a kind of blower control method, it is characterised in that applied in blower fan control system, the blower fan control system includes sense Warm device, voltage detection module, main control module and fan control module, the temperature sensing device are connected to blower voltage input Between power supply, and the region of the weak heat-dissipating nearby or in electrical equipment of important devices in electrical equipment is laid in, for perceiving local environment Temperature change, the resistance of the temperature sensing device are varied with temperature and changed, and methods described comprises the following steps：S1, gather blower fan input voltage；S2, Treatment Analysis is carried out to blower fan input voltage, adjusted according to the generation with test rotating speed and rotating speed of target prestored Fast control signal；S3, blower fan work state is controlled according to speed regulating control signal, adjusts its rotating speed.
- 8. blower control method according to claim 7, it is characterised in that also pre-established before step S1 including storage Meet the first corresponding relation of blower fan input voltage and test rotating speed under the conditions of temperature-sensitive device temperature characteristic, and pre-establish Meet different blower fan input voltage sections and default noise section and rotating speed of target under the conditions of temperature-sensitive device temperature characteristic the Two corresponding relations.
- 9. blower control method according to claim 8, it is characterised in that S2 specific implementation includes:S2.1, rotating speed is tested according to corresponding to the first corresponding relation obtains the blower fan input voltage, according to the second corresponding relation Obtain rotating speed of target corresponding to the blower fan input voltage；S2.2, calculates the difference status of test rotating speed and rotating speed of target, and determines speed-regulating scheme according to difference status；S2.3, speed regulating control signal is produced according to speed-regulating scheme and is sent to fan control module.
- 10. blower control method according to claim 7, it is characterised in that also include before performing S2：Blower fan input voltage rate of change is obtained according to the blower fan input voltage of collection；By blower fan input voltage rate of change compared with the voltage change ratio drawn according to temperature sensing device temperature profile, it must go on business Different value；When difference value within a preset range when, be determined as normal condition, carry out normal speed governing processing；When difference value is not default In the range of when, be determined as abnormality, if single discrepancy then abandons processing, adjusted based on next section of normal data Speed processing, it is determined as temperature sensing device exception if continuously there is discrepancy, carries out the processing that reports an error, reminds detection temperature sensing device.
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| CN201610656270.7A CN107725450B (en) | 2016-08-11 | 2016-08-11 | Fan control method and system and electrical equipment with cooling fan |
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