CN104132437B - The air inlet mechanism and control method of air cleaning system - Google Patents
The air inlet mechanism and control method of air cleaning system Download PDFInfo
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- CN104132437B CN104132437B CN201410401364.0A CN201410401364A CN104132437B CN 104132437 B CN104132437 B CN 104132437B CN 201410401364 A CN201410401364 A CN 201410401364A CN 104132437 B CN104132437 B CN 104132437B
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Abstract
A kind of air inlet mechanism of air cleaning system, including multiple blower fan groups, intake air environmental quality instrumentation, entrance wind pressure and wind speed sensor；Each blower fan group includes many frequency conversion fans, and same group of many frequency conversion fans are intervally arranged successively along air intake path, and different blower fan groups are distributed in the circumferential different azimuth in air channel.The air intake control method of air inlet mechanism is, using three ring PID control strategies, i.e. speed ring, pressure rings and quality of air environment ring.The present invention is constituted frequency conversion fan group in parallel, can be met air intake parameter designing demand by the comprehensive arrangement of multigroup frequency conversion fan.The air inlet of each frequency conversion fan is respectively provided with electric or hand blinds actuation means, the occurrence of effectively can preventing from leaking out, also, when external environment deteriorates, air cleaning system and its internal environment are played a protective role；Frequency conversion fan staged is opened, and suitable blower fan can be selected rapidly, in an orderly manner, by the blast and air rate adjustment in air channel to standard value.
Description
Technical field
The present invention relates to the air inlet mechanism and control method of environmental improvement, more particularly to a kind of air cleaning system.
Background technology
There is problems with the air inlet mechanism of existing air cleaning system：
1st, air inlet position arranges single in space, it is impossible to multiple spot omnirange air intake, so reduces air intake efficiency.
2nd, air intake motor is generally single variable-frequency motor or power frequency electric mechanism into time lag, big inertia, nonlinear system
Middle regulation air quantity, blast, wind speed means it is single, and under the operating mode without hot backup redundancy, once main air blower failure, can influence whole
The normal work of individual air cleaning system.
3rd, the associated variable of the intake setting value of air inlet unit is relatively simple, is generally manually to quantify air intake on time, lacks
Automatic regulation air intake parameter on demand, no air inlet quality of air environment detection and air outlet quality of air environment detection feedback etc.
Variable participates in control in real time, and whole system belongs to opened loop control, easily causes energy waste.
The content of the invention
The purpose of the present invention, exactly for the entering there is provided a kind of air cleaning system of new structure that solve the above problems
Wind mechanism and its control method.
In order to achieve the above object, present invention employs following technical scheme：A kind of air inlet mechanism of air cleaning system,
The air channel for being arranged on air cleaning system is anterior, including at least two blower fan groups, entrance wind pressure sensor and inlet velocity sensing
Device；Wherein, each blower fan group includes at least two frequency conversion fans, same group of at least two frequency conversion fans along air intake path successively
It is intervally arranged, different blower fan groups are distributed in the circumferential different azimuth in air channel；Entrance wind pressure sensor is set with inlet velocity sensor
Put in air channel.
As a further improvement, the air inlet mechanism of above-mentioned air cleaning system, in addition to axle stream frequency conversion fan, the axle rheology
Frequency blower fan is arranged in the air channel after each blower fan group, with each wind units connected in series, constitutes Redundant backup mode of operation.
As a further improvement, the air inlet mechanism of above-mentioned air cleaning system, in addition to the detection of intake air environmental quality
Instrument, it is arranged on outside air channel.
As a further improvement, the air inlet mechanism of above-mentioned air cleaning system, wherein, the intake air environmental quality inspection
Survey the detection that instrument includes being used to detect PM10, PM2.5, carbon monoxide, sulfur dioxide, nitrogen dioxide, ozone or environmental noise
One or more combination in probe.
As a further improvement, the air inlet mechanism of above-mentioned air cleaning system, wherein, every frequency conversion wind of the blower fan group
The air inlet of machine is respectively arranged with movable shutters device.The movable shutters device can be Electronic control or control manually
System.
The control method of above-mentioned any one air inlet mechanism, comprises the following steps：
Staged opens each frequency conversion fan of the blower fan group step by step, and detects when the overall wind speed and wind in primary air separating duct
Pressure, if the wind speed and blast that detect reach default desired value, stops further opening remaining in the blower fan group
Frequency conversion fan, on the contrary then further unlatching next stage frequency conversion fan；
Detect the state of each frequency conversion fan in the blower fan group that has turned on, judge each frequency conversion fan in positive constantly inlet wind state or
It is blow down condition；If at least one frequency conversion fan is in blow down condition, the reduction frequency conversion fan for being in blow down condition
Rotating speed, or close the frequency conversion fan in blow down condition and close the shutter device of its air inlet.
As a further improvement, the control method of above-mentioned air inlet mechanism, wherein, the blower fan group is opened step by step in staged
Each frequency conversion fan during, often open after next stage frequency conversion fan, perform described detect and respectively become in the blower fan group that has turned on
The step of state of frequency blower fan.
As a further improvement, the control method of above-mentioned air inlet mechanism, wherein, the blower fan group is opened step by step in staged
Each frequency conversion fan the step of after, the state of each frequency conversion fan in the blower fan group that periodic detection has turned on.
As a further improvement, the control method of above-mentioned air inlet mechanism, wherein, it is described to detect each in the blower fan group having turned on
The mode of the state of frequency conversion fan is：
Each frequency conversion fan is pre-saved in the blower fan group under general environment, the corresponding normal current of different motor speeds
Value；
In the case of frequency conversion fan motor speed is fixed, the current value of the frequency conversion fan reality to having turned on is examined
Survey, if the current value detected exceeds the corresponding normal current value of the rotating speed preserved, and it is default poor beyond partly reaching
Value, then judge that the frequency conversion fan is in blow down condition.
As a further improvement, the control method of above-mentioned air inlet mechanism, wherein, after each frequency conversion fan of blower fan group,
The state of each frequency conversion fan in one wind pressure sensor and air velocity transducer, the blower fan group that the detection has turned on is set respectively
Mode is：
During blower fan staged is opened step by step, often open after next stage frequency conversion fan, read this grade of frequency conversion fan
The detected value of corresponding air velocity transducer and wind pressure sensor, if air speed value and wind pressure value that detection is obtained are below or equal to
The air speed value and wind pressure value of upper level, then judge that the frequency conversion fan is in blow down condition.
As a further improvement, the control method of above-mentioned air inlet mechanism, further comprising the steps of：
Using speed ring, pressure rings and the ring PID control strategy of quality of air environment ring three, the air inlet mechanism is controlled
System；Speed ring adjusts the wind speed in air channel by adjusting the motor speed of each frequency conversion fan of the blower fan group, wind speed and electricity
Machine rotating speed is directly proportional；Pressure rings adjust the blast in air channel by adjusting the motor speed of frequency conversion fan, and blast turns with motor
Speed square is directly proportional；Quality of air environment ring controlled by intake air environmental quality parameter values for detection wind speed in air channel and
The desired value of blast, quality of air environment the parameter values for detection different wind speed of correspondence and blast desired value in different range are empty
The quality of air environment that quality testing parameter value in compression ring border is characterized is poorer, and the desired value of the wind speed and blast is higher.
As a further improvement, the control method of above-mentioned air inlet mechanism, wherein, the use speed ring, pressure rings and sky
The ring PID control strategy of compression ring border quality loop three, to comprising the following steps that the air inlet mechanism is controlled：
A, the desired value for wind speed and blast in air channel preset multiple class, the wind speed and pressure desired value correspondence of different class
Different quality of air environment range of parameter values, the corresponding relation is stored in a formula table；
B, according to current entry quality of air environment parameter values for detection and the formula table, wind speed and wind in adjustment air channel
The desired value of pressure；
C, the wind speed that basis is currently set and blast desired value, are adjusted, first root to the motor speed of frequency conversion fan
According to wind speed standard value, motor speed is adjusted, then after the adjustment on the basis of motor speed, is carried out with reference to blast desired value micro-
Adjust, the air speed value and wind pressure value after adjustment are suitable with standard value.
The present invention makes it compared with prior art, had the following advantages that and feature as a result of above technical scheme：
1st, air inlet mechanism includes at least two blower fan groups, and each blower fan group includes at least two frequency conversion fans, same group
At least two frequency conversion fans are intervally arranged successively along air intake path.The air inlet mechanism uses multiple spot omnidirectional air inlet mode, will be multiple
Frequency conversion fan composition frequency conversion fan group in parallel, it is in parallel after be equivalent to a new synthesis fan performance curve, make its meet into
Wind parameter designing demand, its air quantity is the superposition of several air quantity of variable-frequency fan, and blast keeps constant.
2nd, the air inlet of each frequency conversion fan is respectively provided with electric or hand movable shutters device, for opening, closing
Air inlet.It is advantageous that：1), when the parameters such as wind speed, blast reach or are required beyond control, can with dynamic regulation each
Variable-frequency motor, stops one of them or several variable-frequency motors, to be not through the return air in pipeline to be stopped the air intake of blower fan
Mouth leakage, will turn off the movable shutters device of its corresponding air inlet, to reach the effect of energy-conservation.2), in part frequency conversion
When motor is in blow down condition, the movable shutters device of these variable-frequency motor air inlets can be closed, to ensure the wind in air channel
Fast blast meets standard value, while reaching the effect of energy-conservation.3), when external environment deteriorates, during such as extraneous generation fire,
Air cleaning system and its internal environment can be played a protective role by closing movable shutters device in time.
3rd, staged opens each frequency conversion fan of the blower fan group step by step, and detects when the overall wind speed and wind in primary air separating duct
Pressure, if the wind speed and blast that detect reach default desired value, stops further opening remaining in the blower fan group
Frequency conversion fan, on the contrary then further unlatching next stage frequency conversion fan；Suitable wind can be selected rapidly, in an orderly manner by this way
Machine, standard value is quickly adjusted to by the blast and wind speed in ventilation shaft, is by virtue of experience carried out repeatedly without staff
Test and adjustment.
4th, the state of each frequency conversion fan in the blower fan group having turned on is detected, judges that each frequency conversion fan is in positive constantly inlet wind state
Or blow down condition；If at least one frequency conversion fan is in blow down condition, the reduction frequency conversion wind for being in blow down condition
The rotating speed of machine, or close the frequency conversion fan in blow down condition and close the shutter device of its air inlet.On the one hand it is anti-
Only because leak out and caused by unnecessary waste of energy, reach energy-saving effect；On the other hand, effectively prevent tighter in the situation of leaking out
During weight, the motor overheating of frequency conversion fan burns.
5th, using three ring PID control strategies, i.e. speed ring, pressure rings and the ring PID control strategy of quality of air environment ring three,
Air inlet mechanism is controlled.Quality of air environment the parameter values for detection different wind speed of correspondence and blast target in different range
Value, the quality of air environment that quality of air environment parameter values for detection is characterized is poorer, and the desired value of wind speed and blast is higher, so that
Can be when quality of air environment to be poor, the automatic speed for accelerating air cleaning is met an urgent need automatically to severe air quality
Processing.
Brief description of the drawings
Fig. 1 is the basic structure schematic diagram of the air inlet mechanism of air cleaning system of the present invention.
Embodiment
Embodiment 1：
Referring to Fig. 1, the air inlet mechanism of air cleaning system of the invention, the air channel 1 for being arranged on air cleaning system is anterior,
Including multiple blower fan groups 2, intake air environmental quality instrumentation 3, entrance wind pressure sensor 4 and inlet velocity sensor 5；Its
In, each blower fan group includes many frequency conversion fans so that intake is in 6000m3/h---30000m3/ h is adjustable, frequency conversion fan
Model can be T35-11-2.8.Same group of many frequency conversion fans are intervally arranged successively along air intake path, different blower fan components
Cloth is in the circumferential different azimuth in air channel, to ensure the pending sky that can suck different spaces region with omnidirectional along air inlet unit path
Gas, the air inlet mechanism uses multiple spot omnidirectional air inlet mode, and multiple frequency conversion fans are constituted to frequency conversion fan group in parallel, after parallel connection etc.
Imitate as a new synthesis fan performance curve, it is met air intake parameter designing demand, its air quantity is several frequency conversion fans
The superposition of air quantity, blast keeps constant.
The air inlet of each frequency conversion fan is provided with the shutter device of electric or hand manipulation, for open, close into
Air port.It is advantageous that：1), can be with each change of dynamic regulation, when the parameters such as wind speed, blast reach or are required beyond control
Frequency motor, stops one of them or several variable-frequency motors, to be not through the return air in pipeline to be stopped the air inlet of blower fan
Leakage, will turn off the movable shutters device of its corresponding air inlet, to reach the effect of energy-conservation.2), in part variable-frequency electric
When machine is in blow down condition, the movable shutters device of these variable-frequency motor air inlets can be closed, to ensure the wind speed in air channel
Blast meets standard value, while reaching the effect of energy-conservation.3), can during such as extraneous generation fire, when external environment deteriorates
By closing movable shutters device in time, to be played a protective role to air cleaning system and its internal environment.
Intake air environmental quality instrumentation 3 is arranged on outside air channel, and the intake air environmental quality instrumentation includes
For detecting one in PM10, PM2.5, carbon monoxide, sulfur dioxide, nitrogen dioxide, ozone and the detection probe of environmental noise
Plant or a variety of, for gathering the ambient air quality parameter outside air inlet.Entrance wind pressure sensor 4 and inlet velocity sensor 5
It is separately positioned in air channel；Entrance wind pressure sensor is responsible for gathering the wind pressure parameter in air channel；Inlet velocity sensor is responsible for adopting
Collect the wind speed parameter in air channel.This air inlet unit can also include axle stream frequency conversion fan 6, such as model HTF (GYF)-I-8, the axle
Stream frequency conversion fan is arranged on the air inlet unit end in air channel.Foregoing small-sized variable-frequency blower fan group and axle stream frequency conversion fan tandem
Set, constitute Redundant backup mode of operation.On the premise of air quantity is constant, the blast in air channel can be improved, is overcome in pipeline
Accumulation windage during long time running, enhances air intake efficiency.
Embodiment 2：
The air intake control method of above-mentioned air inlet mechanism comprises the following steps：
When blower fan is opened, staged opens each frequency conversion fan of the blower fan group step by step, and detects when in primary air separating duct
Overall wind speed and blast, if the wind speed and blast that detect reach default desired value, stop further opening the wind
The frequency conversion fan of remaining in unit, on the contrary then further unlatching next stage frequency conversion fan；By this way can rapidly, in an orderly manner
Suitable blower fan is selected, the blast and wind speed in ventilation shaft are quickly adjusted to standard value, relied on without staff
Experience test and adjust repeatedly.
During staged opens each frequency conversion fan of the blower fan group step by step, next stage frequency conversion fan is often opened
Afterwards, the state of each frequency conversion fan in the blower fan group that detection has turned on, judges that each frequency conversion fan is in positive constantly inlet wind state or leakage
Wind state；If at least one frequency conversion fan is in blow down condition, turn of the reduction frequency conversion fan in blow down condition
Speed, or close the frequency conversion fan in blow down condition and close the shutter device of its air inlet.So as to effectively prevent wind
Wind in road leaks, on the one hand prevent because leak out and caused by unnecessary waste of energy, reach energy-saving effect；On the other hand, have
Effect prevent the situation of leaking out than it is more serious when, the motor load of frequency conversion fan is excessive, causes motor overheating to burn.
Specifically, when being in blow down condition in blower fan present position, if the still normally-open blower fan, and according to just
Reason condition sets its rotating speed, then blower fan increases blower fan electric current to meet default rotating speed, it is necessary to increase its load.If
Situation of leaking out is serious, it is understood that there may be analogue：Blower fan electric current increases to maximum, can not also resist the wind-force leaked out, the blower fan
In the presence of the situation of leaking out, blower fan due to being unable to reach rotating speed of target always, so maintaining maximum current all the time, electric current continued
Greatly, motor overheating is caused to damage or burn；Or, the wind-force of blower fan offsets situation with the wind-force leaked out reluctantly, this
In the case of, blower fan can equally should be electric current continue it is excessive, and motor overheating damage；Or, even without burning, but waste a large amount of
Electric power, and not up to expected air inlet effect.
In present embodiment, after the step of staged opens each frequency conversion fan of the blower fan group step by step, still may be used
The state of each frequency conversion fan in the blower fan group being had turned on periodic detection, judge each frequency conversion fan be in positive constantly inlet wind state or
Blow down condition；If at least one frequency conversion fan is in blow down condition, the reduction frequency conversion fan in blow down condition
Rotating speed, or close the frequency conversion fan in blow down condition and close the shutter device of its air inlet.It can be seen that, wind speed,
When the parameters such as blast reach that control is required, it can equally be protected with the state of each blower fan of periodic detection, each frequency conversion fan of dynamic regulation
The air inlet effect for hindering each blower fan is reached most preferably, and the energy loss in running is preferably minimized, the operation of system is reduced
Cost, extends the service life of blower fan.
The mode of the state of each frequency conversion fan can be in the blower fan group that the detection has turned on：
Each frequency conversion fan is pre-saved in the blower fan group under general environment, the corresponding normal current of different motor speeds
Value；
In the case of frequency conversion fan motor speed is fixed, the current value of the frequency conversion fan reality to having turned on is examined
Survey, if the current value detected exceeds the corresponding normal current value of the rotating speed preserved, and it is obvious beyond part, reach
To preset difference value, then judge that the frequency conversion fan is in blow down condition.
The control method of above-mentioned air inlet mechanism is further comprising the steps of：
Using speed ring, pressure rings and the ring PID control strategy of quality of air environment ring three, the air inlet mechanism is controlled
System；Speed ring adjusts the wind speed in air channel by adjusting the motor speed of each frequency conversion fan of the blower fan group, wind speed and electricity
Machine rotating speed is directly proportional；Pressure rings adjust the blast in air channel by adjusting the motor speed of frequency conversion fan, and blast turns with motor
Speed square is directly proportional；Quality of air environment ring controlled by intake air environmental quality parameter values for detection wind speed in air channel and
The desired value of blast, quality of air environment the parameter values for detection different wind speed of correspondence and blast desired value in different range are empty
The quality of air environment that quality testing parameter value in compression ring border is characterized is poorer, and the desired value of the wind speed and blast is higher.
Comprise the following steps that：
A, the desired value for wind speed and blast in air channel preset multiple class, the wind speed and pressure desired value correspondence of different class
Different quality of air environment range of parameter values, the corresponding relation is stored in a formula table；
B, according to current entry quality of air environment parameter values for detection and the formula table, wind speed and wind in adjustment air channel
The desired value of pressure；
C, the wind speed that basis is currently set and blast desired value, are adjusted, first root to the motor speed of frequency conversion fan
According to wind speed standard value, motor speed is adjusted, then after the adjustment on the basis of motor speed, is carried out with reference to blast desired value micro-
Adjust, the air speed value and wind pressure value after adjustment are suitable with standard value.
Embodiment 3：
Present embodiment is roughly the same with embodiment 2, and its difference is, detects each frequency conversion wind in the blower fan group having turned on
The mode of the state of machine is different, that is, judges that the mode that frequency conversion fan leaks out is different.
In present embodiment, after each frequency conversion fan of blower fan group, a wind pressure sensor and wind speed is set to pass respectively
The mode of the state of each frequency conversion fan is in sensor, the blower fan group that the detection has turned on：
During blower fan staged is opened step by step, often open after next stage frequency conversion fan, read this grade of frequency conversion fan
The detected value of corresponding air velocity transducer and wind pressure sensor, if air speed value and wind pressure value that detection is obtained are below or equal to
The air speed value and wind pressure value of upper level, then judge that the frequency conversion fan is in blow down condition.By this way, equally can rapidly,
Suitable blower fan is selected in an orderly manner, the blast and wind speed in ventilation shaft are quickly adjusted to standard value, without the people that works
Member is by virtue of experience tested and adjusted repeatedly.
And it is possible to effectively prevent the wind in air channel from leaking, on the one hand prevent because leak out and caused by unnecessary electric energy wave
Take, reach energy-saving effect；On the other hand, effectively prevent the situation of leaking out than it is more serious when, the motor load of frequency conversion fan is excessive,
Motor overheating is caused to burn.
Embodiment 4
Present embodiment and embodiment 2 are similar, and its difference is, using speed ring, pressure rings and air ambient matter
The mode of the amount ring PID control of ring three slightly has difference.
In present embodiment, when the quality of air environment parameter values for detection of air inlet is inferior to preset value 1, such as detect
When PM10/PM2.5 concentration values are higher than maximum preset value (preset value 1), represent that the particle concentration of air inlet is big, by change in parallel
Maximum wind velocity and blast pattern are arrived in frequency blower fan group (and axle stream frequency conversion fan connected in series) regulation, will be along intake stack side
To pollution air quickly suck purified treatment carried out in intake stack (i.e. air channel)；When the quality of air environment of air inlet is detected
When being better than preset value 2 to quality of air environment parameter values for detection, such as detect PM10/PM2.5 concentration values and be less than minimum preset value
When (preset value 2), represent that the particle concentration of air inlet meets quality of air environment index, one closed in parallel fan group
Or several frequency conversion fans and corresponding shutter device, the frequency conversion fan worked in dynamic regulation blower fan group (and it is connected in series
The axle stream frequency conversion fan of arrangement) rotating speed, it is ensured that minimum wind speed, minimum wind pressure value in intake stack, make in air inlet unit
Frequency conversion fan is operated in maximum energy-saving pattern；When the quality of air environment parameter values for detection of air inlet is in preset value 1 and preset value 2
Between when, when such as detecting PM10/PM2.5 concentration values between minimum value and maximum, by the difference of maxima and minima
Equal proportion N deciles, are that the desired value of wind speed and blast in air channel presets N number of class, the wind speed and pressure desired value pair of different class
Different quality of air environment range of parameter values are answered, the corresponding relation is stored in a formula table；According to currently detected
Quality of air environment parameter values for detection (such as PM10/PM2.5 concentration values), the formula table is retrieved, it is determined that when the wind in primary air separating duct
The desired value of speed and blast.According to the wind speed and the desired value of blast currently set, the motor speed of frequency conversion fan is adjusted
It is whole, first according to wind speed standard value, motor speed is adjusted, then after the adjustment on the basis of motor speed, with reference to blast desired value
It is finely adjusted, the air speed value and wind pressure value after adjustment are suitable with standard value.
Claims (10)
1. a kind of air inlet mechanism of air cleaning system, the air channel for being arranged on air cleaning system is anterior, it is characterised in that including
At least two blower fan groups, entrance wind pressure sensor and inlet velocity sensor；Wherein, each blower fan group includes at least two frequency conversions
Blower fan, same group of at least two frequency conversion fans are intervally arranged successively along air intake path, and it is circumferential that different blower fan groups are distributed in air channel
Different azimuth；Entrance wind pressure sensor is arranged in air channel with inlet velocity sensor；
The air inlet of every frequency conversion fan of the blower fan group is respectively arranged with movable shutters device；
The control method of the air inlet mechanism comprises the following steps：
Staged opens each frequency conversion fan of the blower fan group step by step, and detects the overall wind speed and blast worked as in primary air separating duct, such as
The wind speed and blast that fruit detects reach default desired value, then stop further opening remaining frequency conversion wind in the blower fan group
Machine, on the contrary then further unlatching next stage frequency conversion fan；
The state of each frequency conversion fan in the blower fan group having turned on is detected, judges that each frequency conversion fan is in positive constantly inlet wind state or leakage
Wind state；If at least one frequency conversion fan is in blow down condition, turn of the reduction frequency conversion fan in blow down condition
Speed, or close the frequency conversion fan in blow down condition and close the shutter device of its air inlet.
2. the air inlet mechanism of air cleaning system as claimed in claim 1, it is characterised in that：Also include axle stream frequency conversion fan,
The axle stream frequency conversion fan is arranged in the air channel after each blower fan group, with each wind units connected in series, constitutes Redundant backup mode of operation.
3. the air inlet mechanism of air cleaning system as claimed in claim 1, it is characterised in that：Also include intake air environment matter
Instrumentation is measured, it is arranged on outside air channel.
4. the air inlet mechanism of air cleaning system as claimed in claim 3, it is characterised in that：The intake air environmental quality
Instrumentation includes the inspection for being used to detect PM10, PM2.5, carbon monoxide, sulfur dioxide, nitrogen dioxide, ozone or environmental noise
One or more combination in probing head.
5. the air inlet mechanism of air cleaning system as claimed in claim 1, it is characterised in that open described step by step in staged
During each frequency conversion fan of blower fan group, often open after next stage frequency conversion fan, perform the blower fan group for detecting and having turned on
In each frequency conversion fan state the step of.
6. the air inlet mechanism of air cleaning system as claimed in claim 1, it is characterised in that open described step by step in staged
After the step of each frequency conversion fan of blower fan group, the state of each frequency conversion fan in the blower fan group that periodic detection has turned on.
7. the air inlet mechanism of air cleaning system as claimed in claim 1, it is characterised in that the blower fan that the detection has turned on
The mode of the state of each frequency conversion fan is in group：
Each frequency conversion fan is pre-saved in the blower fan group under general environment, the corresponding normal current value of different motor speeds；
In the case of frequency conversion fan motor speed is fixed, the current value of the frequency conversion fan reality to having turned on is detected,
If the current value detected exceeds the corresponding normal current value of the rotating speed preserved, and reaches preset difference value beyond part,
Then judge that the frequency conversion fan is in blow down condition.
8. the air inlet mechanism of air cleaning system as claimed in claim 1, it is characterised in that in each frequency conversion wind of blower fan group
After machine, each frequency conversion fan in a wind pressure sensor and air velocity transducer, the blower fan group that the detection has turned on is set respectively
The mode of state is：
During blower fan staged is opened step by step, often open after next stage frequency conversion fan, read this grade of frequency conversion fan correspondence
Air velocity transducer and wind pressure sensor detected value, if the obtained air speed value of detection and wind pressure value are below or equal to upper one
The air speed value and wind pressure value of level, then judge that the frequency conversion fan is in blow down condition.
9. the air inlet mechanism of air cleaning system as claimed in claim 1, it is characterised in that further comprising the steps of：
Using speed ring, pressure rings and the ring PID control strategy of quality of air environment ring three, the air inlet mechanism is controlled；
Speed ring adjusts the wind speed in air channel by adjusting the motor speed of each frequency conversion fan of the blower fan group, and wind speed turns with motor
Rapid-result direct ratio；Pressure rings adjust the blast in air channel by adjusting the motor speed of frequency conversion fan, and blast is put down with motor speed
Side is directly proportional；Quality of air environment ring controls wind speed and blast in air channel by intake air environmental quality parameter values for detection
Desired value, quality of air environment the parameter values for detection different wind speed of correspondence and blast desired value, air ring in different range
The quality of air environment that border quality testing parameter value is characterized is poorer, and the desired value of the wind speed and blast is higher.
10. the air inlet mechanism of air cleaning system as claimed in claim 9, it is characterised in that the use speed ring, pressure
Ring and the ring PID control strategy of quality of air environment ring three, to comprising the following steps that the air inlet mechanism is controlled：
A, the desired value for wind speed and blast in air channel preset multiple class, and the wind speed and pressure desired value correspondence of different class is different
Quality of air environment range of parameter values, the corresponding relation is stored in a formula table；
B, according to current entry quality of air environment parameter values for detection and the formula table, wind speed and blast in adjustment air channel
Desired value；
C, the wind speed that basis is currently set and blast desired value, are adjusted to the motor speed of frequency conversion fan, first according to wind
Fast standard value, adjusts motor speed, then after the adjustment on the basis of motor speed, is finely adjusted with reference to blast desired value, adjusts
Air speed value and wind pressure value after whole is suitable with standard value.
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| CN201410401364.0A CN104132437B (en) | 2014-08-14 | 2014-08-14 | The air inlet mechanism and control method of air cleaning system |
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| CN105953358B (en) * | 2016-04-28 | 2019-05-03 | 海信（山东）空调有限公司 | Air-conditioning safety protecting method, device and air-conditioning |
| CN106247311B (en) * | 2016-10-08 | 2019-11-15 | 陕西南梁矿业有限公司 | The automatic blowing-out device that leaks out for economizer |
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