CN103836691A - Range hood, and method and system for adjusting constant air volume of range hood - Google Patents
Range hood, and method and system for adjusting constant air volume of range hood Download PDFInfo
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- CN103836691A CN103836691A CN201410073417.0A CN201410073417A CN103836691A CN 103836691 A CN103836691 A CN 103836691A CN 201410073417 A CN201410073417 A CN 201410073417A CN 103836691 A CN103836691 A CN 103836691A
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Abstract
The invention provides a method and a system for adjusting constant air volume of a range hood. The system comprises a detection unit for detecting the parameters of a motor in the range hood, an air volume monitoring unit for obtaining the real-time air volume of the exhaust outlet of the range hood according to the parameters of the motor, and a control unit for regulating the parameters of the motor through an inverter so as to keep the real-time air volume constant. The parameters of the motor are obtained and the current air volume value is calculated, and then the monitored real-time air volume is fed back to the control unit so that the control unit is capable of regulating the rotating speed or the current of the motor according to the real-time air volume, and therefore, the purpose of regulating the real-time air volume is achieved and the output air volume is kept constant, and moreover, the oil fume suction effect is guaranteed.
Description
Technical field
The invention belongs to field of household appliances, relate in particular to a kind of lampblack absorber and constant wind quantity control method and system.
Background technology
At present, along with the difference of people's living environment, there is variation in kitchen exhaust pipeline.Have the open smoke evacuation of rural area formula, and in most of community, building user on the middle and senior level uses common flue smoke evacuation.In building domestic consumer on the middle and senior level, when low layer user is during to common flue air draft, high-rise user place is subject to greater pressure, makes high-rise mist extractor deleterious.And in the time of high-rise air draft, low layer user need to get final product normal mist extractor compared with the slow-speed of revolution, consume energy little.Tradition lampblack absorber there is no method and automatically adjusts according to different floor user's requests.
And in different common flues, sometimes have the work of a lot of platform lampblack absorber, different time sections common flue pressure difference simultaneously.And under different smoke discharging pipe pressure, need the stable good smoke discharging effect of air quantity guarantee.Traditional lampblack absorber cannot change according to complicated blast, automatically adjusts air draft ability, can only carry out the adjusting of extensive property by manual adjustments gear.Along with the variation of kitchen finishing, different home user's lampblack absorber output channel difference, makes the wind loss difference of exporting.Traditional lampblack absorber cannot be realized the air quantity compensation of loss.
Existing scheme one: adopt three-phase variable frequency motor, given initial current when initial, by monitoring actual speed, in the time that external environment condition static pressure changes, the actual speed of induction can change thereupon, while becoming large as external environment condition static pressure, actual speed under current given electric current can reduce, and be less than the rotating speed that smoke exhaust ventilator gear is set, and adjust given electric current and finally guarantee that motor speed is stabilized in setting value according to velocity error, can compensate to a certain extent wind loss.
The shortcoming that this scheme exists: this scheme is by guaranteeing that motor speed indirectly compensates wind loss to a certain extent, and the discharge quantity of fan of actual lampblack absorber not only and motor speed have relation.Therefore, such scheme is only considered influence of rotation speed, can only indirectly compensate to a certain extent wind loss, can not guarantee to export constant air quantity within the scope of different blast.
Existing scheme two: open air quantity compensate function by two Macintosh on panel, after opening, DC frequency-changing driver receives instruction and improves rotation speed of fan, thereby air output is enhanced, and realizes air quantity compensation.
The shortcoming that this scheme exists: manually starting air quantity compensation, and this scheme is by raising rotating speed enhancing air output, and it is adjusted open loop that air quantity regulates, and cannot confirm whether the concrete airflow value of output meets the demand of user to smoke absorption effect.And the operation interval that can suitably reduce discharge quantity of fan at some, lampblack absorber cannot carry out the adjusting of air quantity self adaptation.
Summary of the invention
Based on this, being necessary, for not following the problem of border blast scope self adaptation regulation output constant wind quantity factually, provides a kind of lampblack absorber constant wind quantity control method.
A kind of lampblack absorber constant wind quantity control method, comprising:
Detect the parameter of electric machine in lampblack absorber;
Obtain the real-time air quantity of the exhaust outlet of lampblack absorber according to the described parameter of electric machine;
Regulate the described parameter of electric machine to make described real-time air quantity keep constant.
In addition, also provide a kind of lampblack absorber constant wind quantity regulating system, having comprised:
Detecting unit, for detection of the parameter of electric machine in lampblack absorber;
Air quantity monitoring means, for obtaining the real-time air quantity of exhaust outlet of lampblack absorber according to the described parameter of electric machine;
Control module, for regulating the described parameter of electric machine to make described real-time air quantity keep constant by inverter.
In addition, also provide a kind of lampblack absorber, it comprises above-mentioned lampblack absorber constant wind quantity regulating system.
Above-mentioned lampblack absorber constant wind quantity control method and system are by obtaining the parameter of electric machine and calculating current airflow value, then the real-time air quantity of monitoring is fed back to control module, make control module adjust motor speed or electric current according to real-time air quantity, reach the object of the real-time air quantity of closed-loop adjustment, assurance discharge quantity of fan is constant, and then guarantees smoke absorption effect.
Accompanying drawing explanation
Fig. 1 is the flow chart of lampblack absorber constant wind quantity control method;
Fig. 2 is the module diagram of lampblack absorber constant wind quantity regulating system.
The specific embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, a kind of lampblack absorber constant wind quantity control method, comprising:
Step S110, the parameter of electric machine in the lampblack absorber of detection lampblack absorber.Particularly, the parameter of electric machine comprises the operational factor of motor, or the parameter of electric machine comprises the combination of operational factor and the parameter own of motor.
In example more specifically, needing the parameter of electric machine detecting can be at least one in operational factor, as running current I(phase or the bus current of motor) etc.
In fact, the parameter of motor own can default in system, comprising: the running current I of motor in the situation of static pressure
0, working voltage u
0, running speed n
0in at least one corresponding informance, and winding parameter, winding parameter comprises at least one in winding resistance, winding number of pole-pairs, winding inductance, back EMF coefficient; Operational factor can detect in real time by testing circuit or chip, and operational factor comprises: motor as running current I, working voltage u, running speed n etc.In a further embodiment, operational factor can also comprise the parameters such as winding magnetic flux, output power of motor, operation inductance.
Step S120, obtains the real-time air quantity of the exhaust outlet of lampblack absorber according to the described parameter of electric machine.Particularly, utilize the above-mentioned parameter of electric machine to set up air quantity model, to calculate the real-time air quantity of exhaust outlet.By utilizing the combination of one or more parameter in the operational factor of motor, set up air quantity model; Or utilize the combination of one or more parameter in the service data of motor and the parameter of the combination of own data own, set up air quantity model.And in use working voltage, conventionally must coordinate at least one parameter own to set up air quantity model, as winding resistance R.
Embodiment mono-: only adopt the running current I in the operational factor of motor to set up air quantity model:
Air quantity Q=C0 × I+C1 × I in real time
2+ C2 × I
3;
In above-mentioned formula, the running current (being bus current) that I is motor, parameter preset C0, C1, C2 can obtain by the air quantity under different static pressure and running current I matching.
Embodiment bis-: adopt motor running speed n and running current I, set up air quantity model:
Air quantity Q=C0 × I+C1 × n × I in real time;
Or Q=C0 × n+C1 × I
2+ C2 × I
2× n
2+ C3 × n
3;
In above-mentioned formula, the running current that I is motor, the running speed of n motor, parameter preset C0, C1, C2, C3 can obtain by the air quantity under different static pressure and operational parameter data matching.
Embodiment tri-: only adopt running speed n, working voltage u in the operational factor of motor and winding resistance R, winding inductance L, winding number of pole-pairs p, the back emf coefficient ke etc. of motor body parameter to set up air quantity model.
By formula: u
2=(k
e× n+ ω L
di
d)
2+ (ω L
qi
q)
2;
ω=2πpn/60；
Wherein, in conventional surface-mount type motor: L
q=L; L
qfor q axle inductance; L
dfor d axle inductance; i
dfor d shaft current; i
qfor q shaft current; ω is motor angular velocity.
At vector controlled i
din=0 control mode, can obtain:
I=(i
2 d+i
2 q)
1/2=i
q；
u
2=(k
e×n)
2+(ωL
qi
q）
2；
I=g(u,n,L,R)=（u
2-(k
e×n)
2）/(ωL)=（u
2-(k
e×n)
2）/(2πpnL/60)；
Can obtain air quantity model formation:
Q=f(u,n,L,R)=C0×g
2(u,n,L,R)+C1×g
3(u,n,L,R)；
Above-mentioned parameter preset C0, C1 can obtain by the air quantity under different static pressure and operational factor (as running current I), parameter fitting own
Utilize operational factor and the parameter own of Real-time Obtaining, and described air quantity model calculates the real-time air quantity of described exhaust outlet.Air quantity model take in embodiment bis-: Q=C0 × I+C1 × n × I, as example, first measures under different static pressure, the running current I of air quantity and motor, the initial data of running speed n.Take rotating speed 800rmp as example:
After initial data curve, obtain formula as follows:
Q=2.9952×I+0.0253×n×I；
Step S130, regulates the described parameter of electric machine to make described real-time air quantity keep constant.Comprise particularly: step 1: the air quantity that calculates real-time air quantity and default air quantity is poor; Step 2: according to the poor corresponding difference of air quantity regulate described operational factor or parameter own (as the connection in series-parallel conversion of winding) make as described in real-time air quantity keep constant.
In a further embodiment, according to the difference of actual air volume model, if use the air quantity model of the above embodiments one and two, step 2 can be to regulate described operational factor to make described real-time air quantity keep constant according to the operational factor of motor and the poor corresponding difference of described air quantity; If use the air quantity model of embodiment tri-, step 2 can be to regulate described operational factor or parameter own to make described real-time air quantity keep constant according to the poor corresponding difference of parameter own, operational factor and the air quantity of motor so.
In the situation that having external wind pressure, the air quantity that calculates default air quantity and real-time air quantity is poor, when real-time air quantity less than default air quantity, and when the poor absolute value of air quantity is greater than preset range, can by increase the electric current of motor or rotating speed make up above-mentioned air quantity poor so that in real time air quantity keep within the specific limits, even constant; When real-time air quantity is larger than default air quantity, and the poor absolute value of air quantity is while being greater than preset range, can by reduce the electric current of motor or rotating speed make up above-mentioned air quantity poor so that in real time air quantity keep within the specific limits, even constant.In addition, poor in preset range when air quantity, can not do the adjustment of operational factor.
In addition, also provide a kind of lampblack absorber constant wind quantity regulating system, having comprised: detecting unit 201, air quantity monitoring means 202, control module 203, inverter 204, this inverter 204 can be three phase variable frequency inverter.
Detecting unit 201 is for detection of the parameter of electric machine in lampblack absorber; Air quantity monitoring means 202 is for obtaining the real-time air quantity of exhaust outlet of lampblack absorber according to the described parameter of electric machine; Control module 203 is for regulating the described parameter of electric machine to make described real-time air quantity keep constant by inverter 204.
Further, in example more specifically, it can be at least one in operational factor that detecting unit 201 needs the parameter of electric machine detecting, and the running current of for example motor detects.Or the parameter of electric machine comprises the combination of operational factor and the parameter own of motor.
In fact, the parameter of motor own can default in system, comprise: the corresponding informance of at least one in the situation of static pressure in the running current of motor, working voltage, running speed, and winding parameter, winding parameter comprises at least one in winding resistance, winding number of pole-pairs, winding inductance, back EMF coefficient; Operational factor can detect in real time by testing circuit or chip, and operational factor comprises: the running current of motor, working voltage, running speed etc.
Air quantity monitoring means 202 is for obtaining the real-time air quantity of described exhaust outlet according to the described parameter of electric machine.By utilizing the combination of one or more parameter in the operational factor of motor, set up air quantity model; Or utilize the combination of one or more parameter in the service data of motor and the parameter of the combination of own data own, set up air quantity model.And in use working voltage, conventionally must coordinate at least one parameter own to set up air quantity model, as winding resistance R.
Further, control module 203 comprises computing module and adjustment module.Computing module is poor for calculating the air quantity of real-time air quantity and default air quantity.Adjustment module for according to the poor corresponding difference of described air quantity and by inverter 204 regulate operational factor or parameter own (as the connection in series-parallel conversion of winding) make as described in real-time air quantity keep constant.
In other embodiments, according to the difference of actual air volume model, the operation principle of adjustment module also has difference.
As to use the air quantity model of the above embodiments one and two, adjustment module be for regulating described operational factor to make described real-time air quantity keep constant according to the operational factor of motor and the poor corresponding difference of described air quantity; As use the air quantity model of embodiment tri-, adjustment module be for according to the poor corresponding difference of the parameter of motor own, operating parameters and described air quantity and by inverter 204 regulate operational factor or own parameter (as the connection in series-parallel conversion of winding) make as described in real-time air quantity keep constant.
In the situation that having external wind pressure, it is poor that computing module calculates the air quantity of default air quantity and real-time air quantity, when real-time air quantity less than default air quantity, and when the poor absolute value of air quantity is greater than preset range, adjustment module can by increase the electric current of motor or rotating speed make up above-mentioned air quantity poor so that in real time air quantity keep within the specific limits, even constant; When real-time air quantity larger than default air quantity, and when the poor absolute value of air quantity is greater than preset range, adjustment module can by reduce the electric current of motor or rotating speed make up above-mentioned air quantity poor so that in real time air quantity keep within the specific limits, even constant, reach the object of the real-time air quantity of closed-loop adjustment, assurance discharge quantity of fan is constant, and then guarantees smoke absorption effect.In addition, poor in preset range when air quantity, can not do the adjustment of operational factor.
In addition, also provide a kind of lampblack absorber, it comprises above-mentioned lampblack absorber constant wind quantity regulating system.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a lampblack absorber constant wind quantity control method, is characterized in that, comprising:
Detect the parameter of electric machine in lampblack absorber;
Obtain the real-time air quantity of the exhaust outlet of lampblack absorber according to the described parameter of electric machine;
Regulate the described parameter of electric machine to make described real-time air quantity keep constant.
2. lampblack absorber constant wind quantity control method according to claim 1, is characterized in that, the described parameter of electric machine comprises the operational factor of motor; Or comprise described operational factor and parameter own.
3. lampblack absorber constant wind quantity control method according to claim 2, it is characterized in that, described operational factor comprises at least one in running current, working voltage, running speed, and described parameter own comprises at least one in winding resistance, winding inductance, winding number of pole-pairs, back EMF coefficient.
4. according to the lampblack absorber constant wind quantity control method described in claim 2 or 3, it is characterized in that, regulating the described parameter of electric machine to make described real-time air quantity keep constant step to be specially:
The air quantity that calculates described real-time air quantity and default air quantity is poor;
Regulate described operational factor to make described real-time air quantity keep constant according to the poor corresponding difference of described air quantity.
5. a lampblack absorber constant wind quantity regulating system, is characterized in that, comprising:
Detecting unit, for detection of the parameter of electric machine in lampblack absorber;
Air quantity monitoring means, for obtaining the real-time air quantity of exhaust outlet of lampblack absorber according to the described parameter of electric machine;
Control module, for regulating the described parameter of electric machine to make described real-time air quantity keep constant by inverter.
6. lampblack absorber constant wind quantity regulating system according to claim 5, is characterized in that, the described parameter of electric machine comprises the operational factor of motor; Or comprise described operational factor and parameter own.
7. lampblack absorber constant wind quantity regulating system according to claim 6, it is characterized in that, described operational factor comprises at least one in running current, working voltage, running speed, and described parameter own comprises at least one in winding resistance, winding inductance, winding number of pole-pairs, back EMF coefficient.
8. according to the lampblack absorber constant wind quantity regulating system described in claim 6 or 7, it is characterized in that, described control module comprises:
Computing module, poor for calculating the air quantity of described real-time air quantity and default air quantity;
Adjustment module, for regulating described operational factor to make described real-time air quantity keep constant according to the poor corresponding difference of described air quantity and by described inverter.
9. a lampblack absorber, is characterized in that, comprises the lampblack absorber constant wind quantity regulating system described in claim 5 to 8 any one.
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