CN108457889A - Speed-changing draught fan control system and control method - Google Patents
Speed-changing draught fan control system and control method Download PDFInfo
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- CN108457889A CN108457889A CN201810185771.0A CN201810185771A CN108457889A CN 108457889 A CN108457889 A CN 108457889A CN 201810185771 A CN201810185771 A CN 201810185771A CN 108457889 A CN108457889 A CN 108457889A
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- Prior art keywords
- speed
- filter element
- draught fan
- air box
- impeller
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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
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
This application involves a kind of speed-changing draught fan control system and control method, speed-changing draught fan control system includes combination filter element, particulate matter sensors, control module and speed-changing draught fan；Combination filter element includes multistage filter, and particulate matter sensors are arranged in the inlet side of combination filter element；Particulate matter sensors are used to acquire the particle concentration of combination filter element inlet side, and are sent to control module；The dynamic dust containing capacity of filters at different levels when control module is used to calculate combination filter element operation, it is additionally operable to calculate total dynamic resistance when the combination filter element operation, and for according to the characteristic curve of fan under total dynamic resistance of combination filter element and the correspondence and different rotating speeds of wind pressure, adjusting the rotating speed of speed-changing draught fan.The application can be during combining the use of filter element, and as the increase of combination filter element resistance ensures that the air output of speed-changing draught fan is constant, the heat exchange efficiency to ensure evaporator is unaffected.
Description
Technical field
The application belongs to air-conditioning draught fan control technology field, and in particular to a kind of speed-changing draught fan control system and controlling party
Method.
Background technology
Upgrade with the consumption of household appliances, domestic air conditioning product is also upgraded to temperature from traditional simple air-conditioner temperature adjusting
The full dimension of humidity, fresh air and cleanliness factor and air current composition is adjusted, this is just to wind turbine form, air-blower control mode and noise reduction
More stringent requirements are proposed for measure.Existing domestic air conditioning generally uses cross flow fan, axial flow blower or the centrifugation wind for having spiral case
Machine.However, the pressure head that cross flow fan can be provided is small；Axial flow blower installation form is not suitable for；There is volute casing centrifugal blower fan to go out one's intention as revealed in what one says
Fast high, dynamic pressure is big, but static pressure efficiency is low, when fan outlet blows to evaporator, since wind speed is high and outlet air is concentrated, evaporator is made to meet
Wind face wind-engaging is uneven, influences the heat exchange efficiency of heat exchanger.
Invention content
To overcome the problems, such as at least to a certain extent present in the relevant technologies, this application provides a kind of speed-changing draught fan controls
System and control method processed.
According to the embodiment of the present application in a first aspect, this application provides a kind of speed-changing draught fan control systems comprising group
Close filter element, particulate matter sensors, control module and speed-changing draught fan；The combination filter element includes multistage filter, institute
Particulate matter sensors are stated to be arranged in the inlet side of the combination filter element；The particulate matter sensors are for acquiring the combination
The particle concentration of the inlet side of filter element, and it is sent to the control module；The control module is for calculating described group
The dynamic dust containing capacity for closing filters at different levels in filter element, total dynamic when being additionally operable to calculate the combination filter element operation hinder
Power, and for according to the wind turbine under total dynamic resistance of the combination filter element and the correspondence and different rotating speeds of wind pressure
Performance curve adjusts the rotating speed of the speed-changing draught fan.
Further, the speed-changing draught fan uses Voluteless fan, and the Voluteless fan includes air box, impeller and electricity
Machine；Directed fluid inlet and air outlet are provided on the air box, the impeller and motor are arranged in the air box, described
The central shaft of impeller is fixedly connected with motor shaft, and the motor is fixed in the air box；The directed fluid inlet, impeller
Air inlet and motor shaft be respectively positioned on same straight line；The air inlet of the impeller is arranged at directed fluid inlet；The wind turbine
It is additionally provided with deflector in case, the deflector is for changing with the direction of the postrotational wind of the impeller, through the deflector
Wind after water conservancy diversion is exported from the air outlet.
Further, be additionally provided at the air outlet of the Voluteless fan and flow case, it is described stream case import with
The air outlet of air box is equal sized；The projection of the outlet face evaporator of the stream case in the horizontal plane；It is described to flow case
Outlet area be greater than or equal to the projection of evaporator in the horizontal plane area.
Further, the air box uses rectangular parallelepiped structure, and the water conservancy diversion is arranged on the one side of the air box
Entrance, and is arranged the air outlet where the directed fluid inlet on the opposite side in side；In the air box, led described in
On inflow entrance to the direction of the air outlet, the impeller and motor are set gradually；Impeller rotation be formed by plane with
Plane where the directed fluid inlet is parallel；
The deflector is arranged at the directed fluid inlet, and the deflector uses annular surface structure, the annular bent
The diameter of face structure one end is less than the diameter of its opposite end；The smaller one end of diameter and the impeller in the annular surface structure
Projection of the front shroud on the wind turbine chamber interior wall where the directed fluid inlet overlap, be relatively large in diameter in the annular surface structure
One end connect with the inner wall of the air box.
Further, the annular surface structure is rotated by a curved section around the central axes of the air box horizontal direction
Obtain, the starting point of the curved section be at the top of the front shroud of the impeller a little in the air box where the directed fluid inlet
Projection on wall, the terminal of the curved section are at the top of the back shroud of the impeller a little in the wind where the directed fluid inlet
Projection in the adjacent inner wall of cabinet inner wall；The curved section meets Archimedes spiral equation or log spiral side
Journey.
Further, the air box uses bottom surface for the rectangular parallelepiped structure of arc, on the one side of the air box
The directed fluid inlet is set, and the air outlet is arranged in the top surface of the air box；In the air box, from the directed fluid inlet
On the side at place to the direction of its opposite flank, the impeller and motor are set gradually, the impeller rotation is formed by flat
Face is parallel with the plane where the directed fluid inlet；The deflector is the lower arcuate surface of the air box.
Further, the lower arcuate surface of the air box as side of the curved section where with the directed fluid inlet to
The side of its opposite flank is pulled up to obtain, and the two-end-point of the curved section was respectively the level that the center of the impeller is done
The intersection point of line and air box both sides inner wall, the horizontal line that the center of the excessively described impeller is done with where the directed fluid inlet
Side is parallel, and the curved section meets Archimedes spiral equation or log spiral equation.
Further, sound-proof sound-absorbing material is covered on the inner wall of the air box.
According to the second aspect of the embodiment of the present application, present invention also provides a kind of speed-changing draught fan control methods comprising
Following steps：
The particle concentration of acquisition combination filter element inlet side；
According to the filter efficiency of filters at different levels in collected particle concentration, total blast volume and combination filter element, meter
It calculates and obtains the dynamic dust containing capacity of filters at different levels in combination filter element；
According to the functional relation of the dust containing capacity and its resistance of preset filters at different levels, the dynamic of filters at different levels is respectively obtained
State resistance；
Dynamic resistance summation to filters at different levels obtains total dynamic resistance when combination filter element operation；
According to the fan performance under the correspondence and different rotating speeds of total dynamic resistance of combination filter element and wind pressure
Curve adjusts the rotating speed of speed-changing draught fan.
Further, the step is according to mistakes at different levels in collected particle concentration, total blast volume and combination filter element
The filter efficiency of filter, the detailed process that the dynamic dust containing capacity of filters at different levels in combination filter element is calculated are：
According to the air output of speed-changing draught fan unit interval and working time, cumulative summation is carried out, the total of speed-changing draught fan is obtained
Air quantity；
It is dense according to the filter efficiency of filters at different levels and particulate matter in the total blast volume of speed-changing draught fan, combination filter element
Degree respectively obtains dynamic dust containing capacity when filter operation at different levels in combination filter element；
Filters at different levels include in primary filter, medium effeciency filter and high efficiency particulate air filter in the combination filter element
It is one or more..
The technical solution that embodiments herein provides can include the following benefits：The application was combined by setting
Unit, particulate matter sensors, control module and speed-changing draught fan are filtered, the particle concentration at filter element inlet side is combined in acquisition,
Using the filter efficiency of filters at different levels in particle concentration, total blast volume and combination filter element, it is single that combination filtering is calculated
The dynamic dust containing capacity of filters at different levels when member operation, is closed according to the function of the dust containing capacity of preset filters at different levels and its resistance
System, respectively obtains the dynamic resistance of filters at different levels, sums to the dynamic resistance of filters at different levels, obtains combination filter element fortune
Total dynamic resistance when row, and according under total dynamic resistance of combination filter element and the correspondence and different rotating speeds of wind pressure
Characteristic curve of fan, adjust the rotating speed of speed-changing draught fan；The application can be during combining the use of filter element, with group
The increase for closing filter element resistance ensures that the air output of speed-changing draught fan is constant, to ensure the heat exchange efficiency of evaporator not by shadow
It rings.In addition, the application flows case by setting, it can ensure that air box exit flow and wind speed are evenly distributed on section, make
It is uniform to obtain the wind speed profile that evaporator heads on, optimizes the heat-exchanging state of evaporator, improves heating efficiency, reaches energy-saving and noise-reducing
Effect.
It should be understood that above general description and following detailed description is only exemplary and explanatory, not
The application can be limited.
Description of the drawings
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and the principle together with specification for explaining the application.
Fig. 1 is a kind of one of the structural schematic diagram of speed-changing draught fan control system shown according to an exemplary embodiment.
Fig. 2 is a kind of second structural representation of speed-changing draught fan control system shown in an exemplary embodiment.
Fig. 3 is that the structure of Voluteless fan in a kind of speed-changing draught fan control system shown according to an exemplary embodiment is shown
One of be intended to.
Fig. 4 is that the structure of Voluteless fan in a kind of speed-changing draught fan control system shown according to an exemplary embodiment is shown
The two of intention.
Fig. 5 is a kind of flow chart of speed-changing draught fan control method shown according to an exemplary embodiment.
Specific implementation mode
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of consistent device and method of some aspects be described in detail in claims, the application.
During the use of household air-conditioning products, the inventor of the present application discovered that with filter in domestic air conditioning product
Use, dust accumulation is more and more on filter, and the resistance of filter is increasing.In the case where rotation speed of fan is constant, wind turbine
The air output of unit interval can be smaller and smaller.The reduction of wind turbine unit interval air output can influence the heat exchange efficiency of evaporator, from
And waste of energy.
Fig. 1 and Fig. 2 is a kind of structural schematic diagram of speed-changing draught fan control system shown according to an exemplary embodiment.Such as
Shown in Fig. 1 and Fig. 2, the application speed-changing draught fan control system includes combination filter element 1, particulate matter sensors 2, control module 3
With speed-changing draught fan 4.It includes multistage filter to combine filter element 1, can be arranged at purification operating mode return air inlet.Particulate matter passes
Sensor 2 is arranged in the inlet side of combination filter element 1.Electric air valve is set at air conditioning condition return air inlet.Particulate matter sensors 2 are used
Particle concentration in the inlet side of acquisition combination filter element 1, and it is sent to control module 3.Control module 3 is for calculating group
The dynamic dust containing capacity for closing filters at different levels in filter element 1, the total dynamic for being additionally operable to calculate when combination filter element 1 is run hinder
Power, and for according to the wind turbine under total dynamic resistance of combination filter element 1 and the correspondence and different rotating speeds of wind pressure
Energy curve, adjusts the rotating speed of speed-changing draught fan 4.
Specifically, it with the increase of total dynamic resistance of combination filter element 1, needs to increase wind pressure.To ensure speed change wind
The air output of unit interval of the machine 4 under given gear is not decayed with the increase of the resistance of combination filter element 1, needs to carry
The rotating speed of high speed-changing draught fan 4.
It purifies under operating mode, the Electric air valve at air conditioning condition return air inlet, particulate matter sensors 2 are closed in the control of control module 3
Particle concentration at the return air inlet of acquisition purification operating mode, and send the data to control module 3.Control module 3 is according to return air
The appearance dirt of filters at different levels in combination filter element 1 is calculated in particle concentration, total blast volume and the known filter efficiency of mouth
Amount.
Under air conditioning condition, the Electric air valve at air conditioning condition return air inlet is opened in the control of control module 3, single in combination filtering
Purification air return mouth bypass is fallen under the action of first 1 resistance, the duct resistance coefficient of air conditioner is relative constant at this time.According to air-conditioning man
Maximum quantity of wind needed for condition determines the duty point of speed-changing draught fan 4, and the fan performance under the rotating speed where the corresponding operating mode is bent
Line, and then the rotating speed of speed-changing draught fan 4 can be obtained, and in this, as the maximum (top) speed under air conditioning condition, and by speed-changing draught fan 4
Air quantity data are sent to control module 3.
In the present embodiment, as shown in figure 3, Voluteless fan may be used in speed-changing draught fan 4, Voluteless fan includes wind turbine
Case 41, impeller 42 and motor 43.Directed fluid inlet 411 and air outlet 412 are provided on air box 41.Impeller 42 and motor 43 are all provided with
It sets in air box 41, the central shaft of impeller 42 is fixedly connected with motor shaft, and motor 43 is fixed by the bracket in air box 41.
Directed fluid inlet 411, the air inlet 421 of impeller and motor shaft are respectively positioned on same straight line.The setting of air inlet 421 of impeller is being led
At inflow entrance 411.Preferably, for ease of all importing in the air inlet 421 of impeller wind, directed fluid inlet 411 stretches into impeller
In air inlet 421, i.e. directed fluid inlet 411 and the air inlet 421 of impeller overlaps.
Deflector 413 is additionally provided in air box 41, deflector 413 is for changing with the wind after 42 high speed rotation of impeller
Direction.Wind after 413 water conservancy diversion of deflector is exported from air outlet 412.
In the present embodiment, it is additionally provided at the air outlet of Voluteless fan and flows case, flow case using both ends open
Rectangular configuration.The import of stream case and the air outlet 412 of air box is equal sized.The outlet face evaporator of stream case is in level
Projection on face.The area of the outlet of stream case is greater than or equal to the area of the projection of evaporator in the horizontal plane.It is such to set
For meter so that sectional wind velocity is low, static pressure is high, and sectional wind velocity is evenly distributed.
In a specific embodiment, as shown in figure 3, air box 41 uses rectangular parallelepiped structure, the side of air box 41
Directed fluid inlet 411 is set on face, air outlet 412 is set on the side opposite with 411 place side of directed fluid inlet.In air box 41
It is interior, from directed fluid inlet 411 to the direction of air outlet 412 on, set gradually impeller 42 and motor 43.42 center of impeller and motor shaft
It is fixedly connected.It is parallel with the plane where directed fluid inlet 411 that the rotation of impeller 42 is formed by plane.411 side of directed fluid inlet
Diameter is less than the diameter of the air inlet 421 of impeller 42, the side of such directed fluid inlet 411 can indent stretch into the air inlet of impeller
In mouth 421.
Deflector 413 is set at directed fluid inlet 411, and deflector 413 uses annular surface structure, annular surface structure one end
Diameter be less than its opposite end diameter.The smaller one end of diameter and the front shroud of impeller 42 enter in water conservancy diversion in annular surface structure
The projection on 41 inner wall of air box where mouth 411 overlaps, the one end being relatively large in diameter in annular surface structure and air box 41
Inner wall connects.In this way, impeller 42 is located in the annular surface structure of the use of deflector 413.Wind enters from the water conservancy diversion of air box 41
Mouth 411 enters the air inlet 421 of impeller.Motor 43 rotates impeller 42 and rotates, and impeller 42 leads the wind for entering air inlet 21
To deflector 413, wind turns after leading deflector 413, is exported from the air outlet 412 of 41 side of air box.Deflector 413
Setting can optimize the air-flow in air box 41, reduce noise.
Specifically, the forming process of the lower arcuate surface of air box 41 is：Do a horizontal line, horizontal line in the center for crossing impeller 42
It is parallel with the side where directed fluid inlet 411, using the intersection point of horizontal line and 41 both sides inner wall of air box as beginning and end, do one
Curved section, curved section are pulled up in the side with side to its opposite flank where directed fluid inlet 411, obtain air box 41
Lower arcuate surface.
Further, curved section meets Archimedes spiral equation or log spiral equation.Deflector 413 is set
Meter can reduce the eddy current loss in air box 41, reduce noise, improve the efficiency of wind turbine.
In the present embodiment, to further decrease noise, sound-proof sound-absorbing material is covered on the inner wall of air box 41.It is making an uproar
Noise reduction can be effectively reduced noise at sound source.
In the present embodiment, motor 43 is using EC motors (brush DC variable-frequency motor) or DC motors (DC frequency-changing electricity
Machine), stepless speed regulation can be carried out.
In the present embodiment, the width of air box 41 and height be all higher than or equal to 1.6 times of impellers 42 diameter.It is such
Being arranged can ensure to ensure its best performance while the cost of Voluteless fan is minimum.
In another specific embodiment, as shown in figure 4, air box 41 uses bottom surface for the rectangular parallelepiped structure of arc.
Directed fluid inlet 411 is set on the one side of air box 41, and air outlet 412 is arranged in the top surface of air box 41.In air box 41, from
On side to the direction of its opposite flank where directed fluid inlet 411, impeller 42 and motor 43 are set gradually.42 center of impeller with
Motor shaft is fixedly connected.It is parallel with the plane where directed fluid inlet 411 that the rotation of impeller 42 is formed by plane.
The lower arcuate surface of air box 41 is as deflector 413.In this way, wind enters leaf from the directed fluid inlet 411 of air box 41
The air inlet 421 of wheel.Motor 43 rotates impeller 42 and rotates, and the wind for entering air inlet 21 is led deflector 413 by impeller 42,
Wind turns after leading deflector 413, is exported from the air outlet 412 of 41 top surface of air box.The lower arcuate surface energy of air box 41
Enough optimize the air-flow in air box 41, reduces noise.
The forming process of the lower arcuate surface of air box 41 is：Do a horizontal line, horizontal line and water conservancy diversion in the center for crossing impeller 42
Side where entrance 411 is parallel, using the intersection point of horizontal line and 41 both sides inner wall of air box as beginning and end, does a curve
Section, curved section are pulled up in the side with side to its opposite flank where directed fluid inlet 411, obtain the arc of air box 41
Bottom surface.
Further, curved section meets Archimedes spiral equation or log spiral equation.The arc of air box 41
The design of shape bottom surface can reduce the eddy current loss of 41 lower half portion of air box, reduce noise, improve the efficiency of wind turbine.
In the present embodiment, to further decrease noise, sound-proof sound-absorbing material is covered on the inner wall of air box 41.It is making an uproar
Noise reduction can be effectively reduced noise at sound source.
In the present embodiment, motor 43 is using EC motors (brush DC variable-frequency motor) or DC motors (DC frequency-changing electricity
Machine), stepless speed regulation can be carried out.
In the present embodiment, the width of air box 41 and height be all higher than or equal to 1.6 times of impellers 42 diameter.It is such
Being arranged can ensure to ensure its best performance while the cost of Voluteless fan is minimum.
In the present embodiment, impeller 42 is preceding, and motor 43 is rear, with the direction towards impeller 42, if impeller 42 turns
To be clockwise, then to the right, i.e., impeller 42 is in air box 41 for the central axes of 41 vertical direction of center deviation air box of impeller 42
In installation site level it is to the right；If the steering of impeller 42 is counterclockwise, the center deviation air box 41 of impeller 42 is vertical
To the left, i.e. installation site level of the impeller 42 in air box 41 is to the left for the central axes in direction.
When impeller 42 deviates the central axes installation of 41 vertical direction of air box, the side that impeller 42 is biased to, impeller 42
The spacing of inner wall of edge and air box 41 be greater than or equal to the diameter of 0.15 times of impeller 42.
As shown in figure 5, being based on above-mentioned speed-changing draught fan control system, present invention also provides a kind of speed-changing draught fan controlling parties
Method, it is suitable for resistance increased systems at any time, include the following steps：
S1, the acquisition of particulate matter sensors 2 combine the particle concentration of 1 inlet side of filter element, and are sent to control module
3.Wherein, particulate matter sensors 2 can acquire two or more simultaneously using the particulate matter sensors of All-in-One
The concentration of grain object.
S2, it is imitated according to the filtering of filters at different levels in collected particle concentration, total blast volume and combination filter element 1
Rate, is calculated the dynamic dust containing capacity of filters at different levels in combination filter element 1, and detailed process is：
According to the air output of 4 unit interval of speed-changing draught fan and working time, cumulative summation is carried out, speed-changing draught fan 4 is obtained
Total blast volume.
It is dense according to the filter efficiency of filters at different levels and particulate matter in the total blast volume of speed-changing draught fan 4, combination filter element 1
Degree respectively obtains dynamic dust containing capacity when filter operation at different levels in combination filter element 1.
Wherein, combination filter element 1 includes the filter of two-stage or the above different stage of two-stage.Specifically, combination filtering
Unit 1 includes one or more in primary filter, medium effeciency filter and high efficiency particulate air filter.
S3, the functional relation according to the dust containing capacity and its resistance of preset filters at different levels, respectively obtain filters at different levels
Dynamic resistance.
S4, it sums to the dynamic resistance of filters at different levels, obtains total dynamic resistance when combination filter element 1 is run.
Wherein, the functional relation of the dust containing capacity of combination filter element 1 and resistance can be that linear relationship or quadratic function close
System.Specifically, it was known that combining the initial resistance of filter element 1 under purification operating mode maximum quantity of wind, 1.5~2 times of groups under the air quantity are set
Close filter element 1 initial resistance be combine filter element 1 whole resistance, establish combination filter element 1 dust containing capacity and resistance it
Between correspondence.According to the correspondence, the group corresponding to the dynamic dust containing capacity in combination 1 operational process of filter element is obtained
Close the dynamic resistance of filter element 1.
S5, according to combination filter element 1 total dynamic resistance and wind pressure correspondence and different rotating speeds under wind turbine
Performance curve adjusts the rotating speed of speed-changing draught fan 4, reaches as the increase of combination 1 resistance of filter element ensures 4 unit of speed-changing draught fan
The constant purpose of the air output of time realizes energy saving and noise reduction effect.
Wherein, total dynamic resistance of combination filter element 1 and the correspondence of wind pressure are：Wind pressure is required to overcome combination
Total dynamic resistance of filter element 1.
In the present embodiment, speed-changing draught fan uses Voluteless fan, the motor of speed-changing draught fan to use EC motor (brush DCs
Variable-frequency motor) or DC motors (direct current variable frequency motor), stepless speed regulation can be carried out, turning for speed-changing draught fan 4 is controlled by control module 3
Speed.
Using the application speed-changing draught fan control system, it can ensure that the increase with filter resistance, speed-changing draught fan are sent
Air quantity is constant, ensures that the heat exchange efficiency of evaporator is constant.
About the device in above-described embodiment, wherein modules execute the concrete mode of operation in related this method
Embodiment in be described in detail, explanation will be not set forth in detail herein.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments
Unspecified content may refer to same or analogous content in other embodiment.
It should be noted that in the description of the present application, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indicating or implying relative importance.In addition, in the description of the present application, unless otherwise indicated, the meaning of " multiple "
Refer at least two.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the application includes other realization, wherein can not press shown or discuss suitable
Sequence, include according to involved function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be by the application
Embodiment person of ordinary skill in the field understood.
Those skilled in the art are appreciated that realize all or part of step that above-described embodiment method carries
Suddenly it is that relevant hardware can be instructed to complete by program, the program can be stored in a kind of computer-readable storage medium
In matter, which includes the steps that one or a combination set of embodiment of the method when being executed.
In addition, each functional unit in each embodiment of the application can be integrated in a central processing module,
Can be that each unit physically exists alone, can also two or more units be integrated in a module.It is above-mentioned integrated
Module both may be used hardware form realize, can also be realized in the form of software function module.The integrated mould
If block is realized in the form of software function module and when sold or used as an independent product, can also be stored in a meter
In calculation machine read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the application.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in can be combined in any suitable manner.
Although embodiments herein has been shown and described above, it is to be understood that above-described embodiment is example
Property, it should not be understood as the limitation to the application, those skilled in the art within the scope of application can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. a kind of speed-changing draught fan control system, which is characterized in that it includes combination filter element, particulate matter sensors, control mould
Block and speed-changing draught fan；The combination filter element includes multistage filter, and the particulate matter sensors setting was combined described
Filter the inlet side of unit；The particulate matter sensors are used to acquire the particle concentration of the inlet side of the combination filter element,
And it is sent to the control module；The dynamic that the control module is used to calculate filters at different levels in the combination filter element is held
Dust quantity is additionally operable to calculate total dynamic resistance when the combination filter element operation, and for according to the combination filter element
Total dynamic resistance and wind pressure correspondence and the characteristic curve of fan under different rotating speeds, adjust the speed-changing draught fan turn
Speed.
2. speed-changing draught fan control system as described in claim 1, which is characterized in that the speed-changing draught fan is using no spiral case wind
Machine, the Voluteless fan include air box, impeller and motor；Directed fluid inlet and air outlet, institute are provided on the air box
It states impeller and motor is arranged in the air box, the central shaft of the impeller is fixedly connected with motor shaft, and the motor is solid
It is fixed to be arranged in the air box；The directed fluid inlet, the air inlet of impeller and motor shaft are respectively positioned on same straight line；It is described
The air inlet of impeller is arranged at directed fluid inlet；Be additionally provided with deflector in the air box, the deflector for changing with
The direction of the postrotational wind of impeller, the wind after the deflector water conservancy diversion are exported from the air outlet.
3. speed-changing draught fan control system as claimed in claim 2, which is characterized in that at the air outlet of the Voluteless fan also
It is provided with and flows case, the import of the stream case and the air outlet of air box are equal sized；The outlet face of the stream case is steamed
Send out the projection of device in the horizontal plane；The area of the outlet of the stream case is greater than or equal to the projection of evaporator in the horizontal plane
Area.
4. speed-changing draught fan control system as claimed in claim 2 or claim 3, which is characterized in that the air box uses cuboid knot
The directed fluid inlet is arranged on the one side of the air box in structure, is set on the side opposite with side where the directed fluid inlet
Set the air outlet；In the air box, from the directed fluid inlet to the direction of the air outlet on, set gradually the leaf
Wheel and motor；It is parallel with the plane where the directed fluid inlet that the impeller rotation is formed by plane；
The deflector is arranged at the directed fluid inlet, and the deflector uses annular surface structure, the annular surface knot
The diameter of structure one end is less than the diameter of its opposite end；In the annular surface structure before the smaller one end of diameter and the impeller
Projection of the cover board on the wind turbine chamber interior wall where the directed fluid inlet overlaps, one be relatively large in diameter in the annular surface structure
End is connect with the inner wall of the air box.
5. speed-changing draught fan control system as claimed in claim 4, which is characterized in that the annular surface structure is by a curved section
It rotates to obtain around the central axes of the air box horizontal direction, the starting point of the curved section is at the top of the front shroud of the impeller
Some projection on the wind turbine chamber interior wall where the directed fluid inlet, the terminal of the curved section are the back shroud of the impeller
Some projection in the adjacent inner wall of the wind turbine chamber interior wall where the directed fluid inlet at top；The curved section meets A Ji
Mead helix equation or log spiral equation.
6. speed-changing draught fan control system as claimed in claim 2 or claim 3, which is characterized in that the air box uses bottom surface for arc
The rectangular parallelepiped structure of shape, is arranged the directed fluid inlet on the one side of the air box, described in the top surface setting of the air box
Air outlet；In the air box, from the side where the directed fluid inlet to the direction of its opposite flank, institute is set gradually
Impeller and motor are stated, it is parallel with the plane where the directed fluid inlet that the impeller rotation is formed by plane；The deflector
For the lower arcuate surface of the air box.
7. speed-changing draught fan control system as claimed in claim 6, which is characterized in that the lower arcuate surface of the air box is by a song
Line segment is pulled up to obtain in the side with side to its opposite flank where the directed fluid inlet, the two-end-point of the curved section
Respectively cross the intersection point of horizontal line and air box both sides inner wall that the center of the impeller is done, the center of the excessively described impeller
The horizontal line done is parallel with the side where the directed fluid inlet, the curved section meet Archimedes spiral equation or
Log spiral equation.
8. speed-changing draught fan control system as claimed in claim 2, which is characterized in that cover sound insulation on the inner wall of the air box
Sound-absorbing material.
9. a kind of speed-changing draught fan control method, which is characterized in that include the following steps：
The particle concentration of acquisition combination filter element inlet side；
According to the filter efficiency of filters at different levels in collected particle concentration, total blast volume and combination filter element, calculate
To the dynamic dust containing capacity of filters at different levels in combination filter element；
According to the functional relation of the dust containing capacity and its resistance of preset filters at different levels, the dynamic resistance of filters at different levels is respectively obtained
Power；
Dynamic resistance summation to filters at different levels obtains total dynamic resistance when combination filter element operation；
According to combination filter element total dynamic resistance and wind pressure correspondence and different rotating speeds under characteristic curve of fan,
Adjust the rotating speed of speed-changing draught fan.
10. speed-changing draught fan control method as claimed in claim 9, which is characterized in that the step is according to collected particle
The filter efficiency of filters at different levels in object concentration, total blast volume and combination filter element, is calculated at different levels in combination filter element
The detailed process of the dynamic dust containing capacity of filter is：
According to the air output of speed-changing draught fan unit interval and working time, cumulative summation is carried out, the total blast volume of speed-changing draught fan is obtained；
According to the filter efficiency and particle concentration of filters at different levels in the total blast volume of speed-changing draught fan, combination filter element, divide
Dynamic dust containing capacity when filter operation at different levels in combination filter element is not obtained；
Filters at different levels include one kind in primary filter, medium effeciency filter and high efficiency particulate air filter in the combination filter element
Or it is a variety of.
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| CN201810185771.0A CN108457889B (en) | 2018-03-07 | 2018-03-07 | Speed-changing draught fan control system and control method |
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| CN108457889B CN108457889B (en) | 2019-09-27 |
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| CN117331272A (en) * | 2023-10-24 | 2024-01-02 | 深圳欣盛商科技有限公司 | Noise reduction method and device for light path open type projector and light path open type projector |
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| CN108457889B (en) | 2019-09-27 |
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