CN114251287B - Centrifugal fan, air outlet control method and device and range hood - Google Patents
Centrifugal fan, air outlet control method and device and range hood Download PDFInfo
- Publication number
- CN114251287B CN114251287B CN202011029856.3A CN202011029856A CN114251287B CN 114251287 B CN114251287 B CN 114251287B CN 202011029856 A CN202011029856 A CN 202011029856A CN 114251287 B CN114251287 B CN 114251287B
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- volute tongue
- centrifugal fan
- air outlet
- volute
- static pressure
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000003068 static effect Effects 0.000 claims abstract description 78
- 230000007246 mechanism Effects 0.000 claims abstract description 59
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 210000002105 tongue Anatomy 0.000 claims description 190
- 238000013507 mapping Methods 0.000 claims description 22
- 238000009434 installation Methods 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 13
- 230000009471 action Effects 0.000 abstract description 11
- 238000012806 monitoring device Methods 0.000 description 13
- 230000002829 reductive effect Effects 0.000 description 13
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 230000036961 partial effect Effects 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 241000886569 Cyprogenia stegaria Species 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- 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
-
- 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
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
- F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
- F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/422—Discharge tongues
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
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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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/626—Mounting or removal of fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
Abstract
The invention discloses a centrifugal fan, an air outlet control method, an air outlet control device and a range hood, wherein the centrifugal fan comprises a shell structure of the centrifugal fan, a centrifugal wind wheel, a static pressure measuring device and a control device, the shell structure of the centrifugal fan comprises a volute, a volute tongue and an adjusting mechanism, the volute is defined to be provided with a mounting cavity and an air outlet channel extending from one side of the mounting cavity, the volute tongue extends towards the center of the air outlet channel and is arranged in a protruding mode, the volute tongue is at least partially arranged in a telescopic mode in the protruding direction, the adjusting mechanism is used for correspondingly adjusting part of telescopic movement of the volute tongue, the static pressure measuring device is used for monitoring static pressure parameters of an air outlet of the centrifugal fan, the control device is used for controlling the action of the adjusting mechanism according to the obtained static pressure parameters of the air outlet of the centrifugal fan, different working conditions are met, the effects of reducing noise and increasing static pressure are achieved, and meanwhile automatic adjustment is convenient to achieve, and user experience is improved.
Description
Technical Field
The invention relates to the technical field of range hoods, in particular to a centrifugal fan, an air outlet control method and device and the range hood.
Background
The main effect of the volute tongue in the centrifugal fan is to split the airflow at the outlet of the volute, when the airflow rate of the large-airflow outlet is higher, the shallow volute tongue is adopted, the impact of the airflow on the volute tongue is reduced, the noise is reduced, when the pipeline resistance is larger, the deep volute tongue is adopted, the backflow at the volute tongue is reduced, the back pressure resistance of the range hood is improved, the airflow is unevenly distributed in the axial direction of the volute, and the effect of reducing the noise and increasing the static pressure can be achieved under most working conditions without a proper volute tongue structure in the prior art, so that the range hood needs to be optimized.
Disclosure of Invention
In view of this, the invention provides a centrifugal fan, which can realize the segmented adjustment of the depth of the volute tongue according to different working conditions, and can play the roles of reducing noise and increasing static pressure under most working conditions, however, how to adjust the depth of the volute tongue in a segmented manner according to different working conditions corresponding to static pressure parameters of an air outlet of the fan is a problem to be solved urgently.
In order to achieve the above object, the centrifugal fan according to the present invention includes:
the centrifugal fan comprises a shell structure, wherein the shell structure of the centrifugal fan comprises a volute, a volute tongue and an adjusting mechanism, the volute is used for defining an installation cavity for installing a centrifugal wind wheel and an air outlet channel extending from one side of the installation cavity, the volute tongue is arranged at the junction of the air outlet channel and the installation cavity, extends towards the center of the air outlet channel and is arranged in a protruding mode, at least part of the volute tongue is arranged in a telescopic mode in the protruding direction, and the adjusting mechanism is used for correspondingly adjusting part of telescopic movement of the volute tongue in a telescopic mode;
the centrifugal wind wheel is rotatably arranged in the mounting cavity;
The static pressure measuring device is used for monitoring the static pressure parameter of the air outlet of the centrifugal fan; and
And the control device is electrically connected with the static pressure measuring device and used for controlling the action of the adjusting mechanism according to the obtained static pressure parameters of the air outlet of the fan.
In an embodiment, the static pressure measuring device comprises a second air outlet pipe arranged at the air outlet of the centrifugal fan, a second air speed pipe is arranged in the second air outlet pipe, and a second static pressure hole is formed in the side wall of the second air speed pipe.
In an embodiment, the direction in which the volute casing extends along the circumferential direction of the air outlet duct is taken as the length direction, the volute tongue comprises a plurality of volute tongue sections which are mutually connected along the length direction, and at least one volute tongue section corresponds to an adjustable part of the volute tongue.
In one embodiment, the volute tongue has a diversion surface formed at one end in the protruding direction, and the diversion surface of each volute tongue section is arranged in a circular arc curved surface.
In an embodiment, the plurality of volute tongue sections includes a first volute tongue section and at least two second volute tongue sections on opposite sides of the first volute tongue section;
the radius of curvature of the flow dividing surface of the first volute tongue section is smaller than that of the flow dividing surface of the second volute tongue section.
In one embodiment, the radius of curvature of the first volute tongue section is R1, and R1 is 5mm less than or equal to 11mm; and/or the number of the groups of groups,
The curvature radius of the second volute tongue section is R2, and R2 is more than or equal to 3mm and less than or equal to 9mm.
In one embodiment, r1=8 mm; and/or r2=6 mm.
The invention also provides a range hood, which comprises a centrifugal fan, wherein the centrifugal fan comprises:
the centrifugal fan comprises a shell structure, wherein the shell structure of the centrifugal fan comprises a volute, a volute tongue and an adjusting mechanism, the volute is used for defining an installation cavity for installing a centrifugal wind wheel and an air outlet channel extending from one side of the installation cavity, the volute tongue is arranged at the junction of the air outlet channel and the installation cavity, extends towards the center of the air outlet channel and is arranged in a protruding mode, at least part of the volute tongue is arranged in a telescopic mode in the protruding direction, and the adjusting mechanism is used for correspondingly adjusting part of telescopic movement of the volute tongue in a telescopic mode;
the centrifugal wind wheel is rotatably arranged in the mounting cavity;
The static pressure measuring device is used for monitoring the static pressure parameter of the air outlet of the centrifugal fan; and
And the control device is electrically connected with the static pressure measuring device and used for controlling the action of the adjusting mechanism according to the obtained static pressure parameters of the air outlet of the fan.
The invention also provides an air outlet control method of the centrifugal fan, which comprises the following steps:
acquiring static pressure parameters of an actual fan outlet of the centrifugal fan;
Obtaining an actual regulation parameter according to the obtained actual fan air outlet static pressure parameter and a first mapping relation, wherein the first mapping relation is a corresponding association relation between the fan air outlet static pressure parameter and the regulation parameter;
and controlling the movement of the adjusting mechanism according to the obtained actual adjusting parameters.
The invention also provides an air outlet control device of the centrifugal fan, which comprises: the centrifugal fan air outlet control program is configured to realize the steps of a centrifugal fan air outlet control method, and the centrifugal fan air outlet control method comprises the following steps of:
acquiring static pressure parameters of an actual fan outlet of the centrifugal fan;
Obtaining an actual regulation parameter according to the obtained actual fan air outlet static pressure parameter and a first mapping relation, wherein the first mapping relation is a corresponding association relation between the fan air outlet static pressure parameter and the regulation parameter;
and controlling the movement of the adjusting mechanism according to the obtained actual adjusting parameters.
According to the technical scheme, the centrifugal fan comprises a shell structure of the centrifugal fan, a centrifugal wind wheel, a static pressure measuring device and a control device, wherein the volute tongue extends towards the center of the air outlet channel and protrudes, at least part of the volute tongue is arranged in a telescopic mode in the protruding direction, the adjusting mechanism is used for correspondingly adjusting part of telescopic movement of the telescopic adjustment of the volute tongue, the control device monitors static pressure parameters of an air outlet of the fan through the static pressure measuring device so as to control the action of the adjusting mechanism, the depth of different positions of the volute tongue can be adjusted through the adjusting function of the adjusting mechanism so as to adapt to the situation that air flows are unevenly distributed in the axial direction of the volute under different working conditions, the effects of reducing noise and increasing static pressure are achieved, meanwhile, the depth distribution in the length direction of the volute tongue is automatically adjusted according to the static pressure parameters of the air outlet of the fan, automatic adjustment is convenient to achieve, and user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of an embodiment of a centrifugal fan according to the present invention;
FIG. 2 is a schematic perspective view of the tongue of FIG. 1 in cooperation with an adjustment mechanism (at an angle);
FIG. 3 is a schematic perspective view of the tongue of FIG. 1 in cooperation with an adjustment mechanism (at another angle);
FIG. 4 is a schematic diagram of a control structure of the centrifugal fan of FIG. 1;
Fig. 5 is a schematic perspective view of an embodiment of a range hood incorporating the centrifugal fan of fig. 1;
Fig. 6 is a schematic view of a partial sectional structure of the range hood of fig. 5;
fig. 7 is a schematic view of a partial sectional perspective structure of the range hood (with a first angle and a first air outlet pipe) in fig. 5;
fig. 8 is a schematic view of a partial sectional perspective structure of the range hood (with a first angle and a second air outlet pipe) in fig. 5;
fig. 9 is a partially cut-away perspective view of the range hood (second angle) of fig. 5;
Fig. 10 is a partially cut-away perspective view of the range hood (third angle) of fig. 5;
Fig. 11 is an enlarged schematic view of a portion a in fig. 10.
FIG. 12 is a schematic diagram of a server architecture of a hardware runtime environment according to an embodiment of the present invention;
FIG. 13 is a flow chart of an embodiment of a method for controlling the air outlet of a centrifugal fan according to the present invention.
Reference numerals illustrate:
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The main effect of the volute tongue in the centrifugal fan is to split the airflow at the outlet of the volute, when the airflow rate of the large-airflow outlet is higher, the shallow volute tongue is adopted, the impact of the airflow on the volute tongue is reduced, the noise is reduced, when the pipeline resistance is larger, the deep volute tongue is adopted, the backflow at the volute tongue is reduced, the back pressure resistance of the range hood is improved, the airflow is unevenly distributed in the axial direction of the volute, and the effect of reducing the noise and increasing the static pressure can be achieved under most working conditions without a proper volute tongue structure in the prior art, so that the range hood needs to be optimized.
In view of this, the present invention provides a range hood, which includes a centrifugal fan, the centrifugal fan includes a shell structure of the centrifugal fan, so long as the centrifugal fan including the shell structure of the centrifugal fan belongs to the protection scope of the present invention, and similarly, the range hood including the centrifugal fan of the present invention belongs to the protection scope of the present invention, wherein fig. 1 to 4 are schematic diagrams of embodiments of the centrifugal fan provided by the present invention, and fig. 5 to 10 are schematic diagrams of embodiments of the range hood provided by the present invention.
Referring to fig. 1 to 4, in an embodiment of the present invention, the centrifugal fan 100 includes a centrifugal fan housing structure, a centrifugal wind wheel 4, a static pressure measuring device and a control device 300, wherein the centrifugal fan housing structure includes a volute 1, a volute tongue 2 and an adjusting mechanism 3, the volute 1 defines a mounting cavity in which the centrifugal wind wheel 4 is mounted, and an air outlet channel 11 extending from one side of the mounting cavity, the volute tongue 2 is disposed at a junction between the air outlet channel 11 and the mounting cavity, and extends toward a center of the air outlet channel 11 and protrudes, the volute tongue 2 is at least partially telescopically disposed in a protruding direction, the adjusting mechanism 3 is configured to correspondingly adjust a part of telescopic movement of the volute tongue 2, the centrifugal wind wheel 4 is rotatably mounted in the mounting cavity, the static pressure measuring device is configured to monitor a static pressure parameter of a fan air outlet of the centrifugal fan 100, and the control device 300 is electrically connected to the monitoring device, and is configured to control a static pressure action of the adjusting mechanism 3 according to the obtained static pressure parameter of the fan air outlet.
In the technical scheme of the invention, the centrifugal fan 100 comprises a centrifugal fan shell structure, a centrifugal wind wheel 4, a static pressure measuring device and a control device 300, wherein the volute tongue 2 extends towards the center of the air outlet channel 11 and is arranged in a protruding mode, the volute tongue 2 is at least partially arranged in a telescopic mode in the protruding direction, the adjusting mechanism 3 is used for correspondingly adjusting partial telescopic movement of the telescopic adjustment of the volute tongue 2, the control device 300 monitors static pressure parameters of an air outlet of the fan through the static pressure measuring device to control the action of the adjusting mechanism 3, the depth of the airflow at different positions of the volute tongue 2 can be adjusted through the adjusting action of the adjusting mechanism 3, the effects of reducing the volute noise and increasing the static pressure are achieved, meanwhile, the depth distribution of the length direction of the volute tongue 2 is automatically adjusted according to the static pressure parameters of the air outlet of the fan, and automatic adjustment is convenient to achieve and user experience is improved.
The volute tongue 2 is at least partially arranged in a telescopic manner in the protruding direction, and can be telescopic in all the volute tongues 2 or part of the volute tongue 2, in one embodiment, the direction of the volute 1 extending along the circumferential direction of the air outlet duct is taken as the length direction of the volute tongue 2, the volute tongue 2 comprises a plurality of volute tongue sections which are mutually connected along the length direction of the volute tongue 2, at least one of the volute tongue sections is an adjustable part of the volute tongue 2, and the volute tongue 2 is adjusted in a segmented manner by the segmented arrangement, so that the volute tongue 2 is convenient to adjust.
In one embodiment, the volute tongue 2 has a diversion surface formed at one end in the protruding direction, the diversion surface of each volute tongue section is arranged in a curved arc surface, and the diversion surface of each volute tongue section is arranged in a curved surface so as to facilitate diversion in the volute 1, thereby reducing airflow resistance.
The airflow velocity distribution of the volute 1 in the axial plane is uneven, a state that the flow velocity near the middle disk is high and the flow velocity at the two sides is small can occur, in one embodiment, a plurality of volute tongue sections comprise a first volute tongue section 21 and at least two second volute tongue sections 22 positioned at the two sides of the first volute tongue section 21, the curvature radius of the flow dividing surface of the first volute tongue section 21 is smaller than that of the flow dividing surface of the second volute tongue section 22, at the moment, the volute tongue section corresponding to the middle volute tongue section is a sharp volute tongue 2, the volute tongue 2 at the two sides corresponding to the volute tongue section is a flat volute tongue 2, the flow dividing of gas is facilitated, and the backflow at the volute tongue 2 is reduced.
In an embodiment, referring to fig. 3, the radius of curvature of the first volute tongue section 21 is R1, and R1 is less than or equal to 5mm and less than or equal to 11mm, the radius of curvature of the second volute tongue section 22 is R2, and R2 is less than or equal to 3mm and less than or equal to 9mm, so that the flow distribution of the gas is facilitated, the backflow at the volute tongue 2 is reduced, preferably, R1 is 8mm, and R2 is 6mm.
The adjusting mechanism 3 adjusts the depth of the volute tongue 2 according to different working conditions, for example, the resistance at the outlet of the fan is overlarge, the airflow velocity at the volute tongue 2 is smaller, and the static pressure is lifted on the premise of keeping the air quantity due to the smoke discharging requirement so as to overcome the smoke discharging resistance, at the moment, the volute tongue 2 protruding outwards in the middle is adopted, so that the air flow is favorably split, the backflow at the volute tongue 2 is reduced, and the static pressure is lifted; the resistance at the outlet of the fan is moderate, and the comprehensive requirements of air quantity and static pressure are considered, and a volute tongue 2 with relatively flat middle is adopted; the resistance at the outlet of the fan is too small, the airflow velocity at the volute tongue 2 is large, high-frequency pneumatic noise can be generated when high-speed airflow impacts the volute tongue 2, so that the impact of high-speed airflow on the volute tongue 2 can be reduced and the noise can be reduced by adopting the volute tongue 2 with the middle relatively concave.
In an embodiment, referring to fig. 2, the plurality of volute tongue sections includes a first volute tongue section 21 and at least two second volute tongue sections 22 located at two sides of the first volute tongue section 21, in the protruding direction of the volute tongue 2, the first volute tongue section 21 has a first adjusting position protruding outwards relative to the two second volute tongue sections 22, a second adjusting position recessed inwards, and a transition adjusting position between the first adjusting position and the second adjusting position, when the volute tongue 2 is in the first adjusting position, the first adjusting position corresponds to the volute tongue 2 adopting the middle protruding outwards, which is favorable for splitting airflow, reducing backflow at the volute tongue 2, and improving static pressure, and the second adjusting position corresponds to the volute tongue 2 capable of reducing impact of high-speed airflow, reducing noise, and the adjusting mechanism 3 adjusts the volute tongue 2 to switch between the first adjusting position, the transition adjusting position and the second adjusting position, so as to adapt to different conditions, and the first adjusting position and the second adjusting position are different requirements, and have different ranges of increasing absolute static pressure.
The adjusting mechanism 3 is configured to correspondingly adjust the telescopic movement of the telescopic part of the volute tongue 2, and the invention is not limited to a specific driving mode of the adjusting mechanism 3, in an embodiment, the adjusting mechanism 3 includes a linear driving structure 31, the linear driving structure 31 is mounted on the volute 1, the driving end of the linear driving structure 31 is in driving connection with the adjustable part of the volute tongue 2, and the adjustable part of the volute tongue 2 is driven to move by the linear driving structure 31, so that the structure is relatively simple.
The present invention is not limited to the specific structural form of the linear driving structure 31, for example, the linear driving structure 31 may be one of a cylinder, an oil cylinder or an electric push rod, and in an embodiment, the linear driving structure 31 is an electric push rod, so that the use of the automatic control situation is convenient.
In the embodiment in which the volute tongue 2 includes a plurality of volute tongue sections and each volute tongue section is adjustable, the linear driving structure 31 is provided in a plurality of corresponding volute tongue sections, which plays a role in controlling and adjusting respectively, so that the depth distribution of the length direction of the volute tongue 2 can be changed conveniently and quickly, and the use requirements under different working conditions can be adapted quickly.
Referring to fig. 4 to 6, the centrifugal fan 100 according to the present invention includes a housing structure of the centrifugal fan and a centrifugal wind wheel 4 rotatably mounted in a mounting cavity of the housing structure of the centrifugal fan, and since the centrifugal fan 100 includes all the technical features described in the embodiments of the housing structure of the centrifugal fan, all the technical effects described in the embodiments of the housing structure of the centrifugal fan are also provided, which are not described in detail herein.
Referring to fig. 4, in the present invention, the adjusting mechanism 3 of the centrifugal fan 100 is automatically adjusted by the control device 300, in an embodiment, the centrifugal fan 100 further includes a monitoring device 200 and a control device 300, the monitoring device 200 is used for monitoring the working parameters of the centrifugal fan 100, and the control device 300 is electrically connected to the monitoring device 200, so as to control the action of the adjusting mechanism 3 according to the obtained working parameters, and automatically adjust the depth distribution of the volute tongue 2 in the length direction according to different working conditions, thereby facilitating automatic adjustment and improving user experience.
In an embodiment, the operating parameters include at least one of a fan air outlet flow rate parameter, a fan air outlet static pressure parameter, a motor power parameter, and a wind wheel rotation speed parameter, and it should be noted that, in the controlling device 300 controlling the action of the adjusting mechanism 3 according to the obtained operating parameters, the action parameter may be one of the above parameters, or may be any combination of two, three, etc. so as to comprehensively feedback the operating state of the centrifugal fan 100.
In order to obtain the flow rate parameter of the air outlet of the centrifugal fan 100, in an embodiment, the monitoring device 200 includes a flow rate measuring device disposed at the air outlet of the centrifugal fan 100, and is configured to measure the flow rate of the air outlet of the centrifugal fan 100, so that the flow rate of the air outlet of the centrifugal fan 100 can be obtained conveniently, and the working state of the centrifugal fan 100 can be reflected well.
In an embodiment, referring to fig. 7, the flow rate measuring device includes a first wind speed pipe 201, a total pressure hole 2011 of the first wind speed pipe 201 is configured to be set opposite to the air flow of the air outlet of the centrifugal fan 100, a total pressure Pt of the air on the speed measuring pipe is obtained through the total pressure hole 2011, a static pressure Ps of the air is obtained through a corresponding conversion formula by the first static pressure hole 2012The flow rate of the air flowing through the first air speed pipe 201 can be obtained, and the measurement is accurate, and it should be noted that the method of measuring the air speed at the air outlet of the centrifugal fan 100 by using the first air speed pipe 201 is adopted in the prior art, and will not be described in detail herein.
The airflow at the air outlet of the centrifugal fan 100 is uneven, the airflow velocity measured by the first airflow velocity pipe 201 is distributed, so that the airflow velocity measured by the first airflow velocity pipe 201 cannot better reflect the airflow state on the air outlet duct, in an embodiment, the air outlet of the centrifugal fan 100 is provided with a first air outlet pipe 205, a rectifying grid 202 is arranged in the first air outlet pipe 205, the inner cavity of the first air outlet pipe 205 is divided into a plurality of parallel pipe flow channels by the rectifying grid 202, the first airflow velocity pipe 201 is positioned at one side of the rectifying grid 202, which is opposite to the air outlet of the centrifugal fan 100, and is correspondingly arranged in the pipe flow channels, the airflow is uniformly distributed in each pipe flow channel through the rectifying action of the rectifying grid 202, and the local airflow measured by the first airflow velocity pipe 201 can reflect the overall airflow velocity condition on the air outlet duct, so that the centrifugal fan has a better effect.
In one embodiment, the rectifying grille 202 includes a plurality of grid plates that are staggered with each other, and the integral pipeline of the first air outlet pipe 205 is conveniently separated into a plurality of pipe channels by the grid plates that are staggered.
In order to obtain the static pressure parameter of the air outlet of the centrifugal fan 100, the monitoring device 200 includes a static pressure measuring device disposed at the air outlet of the centrifugal fan 100, and is configured to measure the static pressure parameter of the air outlet of the centrifugal fan, where in an embodiment, the static pressure measuring device may be measured by a micro differential pressure meter, please refer to fig. 8, the static pressure measuring device includes a second air outlet pipe 206 disposed at the air outlet of the centrifugal fan 100, a second air outlet pipe 207 is disposed in the second air outlet pipe 206, and a second static pressure hole 208 is disposed on a side wall of the second air outlet pipe 207, so that the static pressure in the second air outlet pipe 207 can be conveniently obtained, and further the static pressure parameter of the air outlet of the centrifugal fan can be obtained.
Of course, the airflow in the second air outlet pipe 206 may be rectified by the above-mentioned rectifying grille 202, so that the airflow is uniformly distributed in the second air outlet pipe 206, and the local airflow gas measured by the second air speed pipe 207 may reflect the overall airflow velocity on the air outlet duct, which has a better effect.
In order to obtain the motor power parameter, in an embodiment, the monitoring device 200 includes a power monitoring device for monitoring the output power of the driving motor of the wind wheel, so that the output power of the driving motor of the wind wheel can be obtained conveniently, and the working state of the centrifugal fan 100 can be reflected well.
In an embodiment, referring to fig. 9, the power monitoring device includes a current sensor 203 for monitoring the current of the driving motor of the centrifugal wind wheel 4, where the current sensor 203 may be disposed on a bus of the driving motor to directly obtain the current of the driving motor, so as to conveniently obtain the motor power of the driving motor.
In order to obtain the rotational speed parameter of the wind wheel, in an embodiment, the monitoring device 200 includes a rotational speed monitoring device for monitoring the rotational speed of the wind wheel, so that the rotational speed of the wind wheel can be obtained conveniently, and the working state of the centrifugal fan 100 can be reflected well.
In an embodiment, referring to fig. 10 and 11, the rotation speed monitoring device includes a reflective photoelectric measurement device 204, where the reflective photoelectric measurement device 204 includes a laser emitter 2041, a laser receiver 2042 and a reflecting sheet 2043, the laser emitter 2041 is disposed on the volute 1, the laser receiver 2042 is disposed on the volute 1, and the reflecting sheet 2043 is disposed on the vane of the wind turbine, where the laser emitter 2041 emits light, and after being reflected by the emitting sheet, the light is received by the laser receiver 2042, so that the rotation speed of the centrifugal wind turbine 4 can be accurately obtained.
The present invention also provides a range hood 1000, where the range hood 1000 includes a centrifugal fan 100, and since the range hood 1000 includes all the technical features described in the embodiments of the centrifugal fan 100, all the technical effects described in the embodiments of the centrifugal fan 100 are also provided, and are not described in detail herein.
Referring to fig. 12, fig. 12 is a schematic structural diagram of an air outlet control device of a centrifugal fan according to the present invention.
As shown in fig. 12, the centrifugal fan outlet control apparatus may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the configuration shown in FIG. 12 is not limiting of the centrifugal fan outlet control apparatus and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components.
As shown in fig. 12, an operating system, a network communication module, a user interface module, and a centrifugal fan outlet control program may be included in a memory 1005 as one type of computer storage medium.
In the server shown in fig. 12, the network interface 1004 is mainly used for connecting a terminal device and performing data communication with the terminal device; the user interface 1003 is mainly used for receiving an input instruction of an administrator; the server calls the centrifugal fan outlet control program stored in the memory 1005 through the processor 1001, and performs the following operations:
Acquiring actual working parameters of the centrifugal fan 100;
Obtaining an actual adjustment parameter according to the obtained actual working parameter and a first mapping relation, wherein the first mapping relation is a corresponding association relation between the working parameter and the adjustment parameter;
And controlling the movement of the adjusting mechanism 3 according to the obtained actual adjusting parameters.
Based on the above hardware structure, fig. 13 is an embodiment of the method for controlling the air outlet of the centrifugal fan provided by the invention.
Referring to fig. 13, in this embodiment, the method for controlling the air outlet of the centrifugal fan includes the following steps:
step S10, acquiring actual working parameters of the centrifugal fan 100;
It should be noted that, the working parameters of the centrifugal fan 100 include a fan air outlet flow rate parameter, a fan air outlet static pressure parameter, a motor power parameter, a wind wheel rotation speed parameter, and the like, which are mainly obtained by monitoring the monitoring device 200, for example, the fan air outlet flow rate parameter may be obtained by measuring the total pressure and the static pressure through the first wind speed pipe 201 and by corresponding relation, for example, the fan air outlet static pressure parameter may be directly measured, for example, a static pressure pipe or the second wind speed pipe 207 may be directly measured, for example, the motor power parameter may be obtained by obtaining the bus current on the driving motor of the wind wheel through the current sensor 203, for example, the wind wheel rotation speed parameter may be measured through the rotation speed measuring device.
Step S20, obtaining an actual adjustment parameter according to the obtained actual working parameter and the first mapping relation;
It should be noted that, the first mapping relationship is a corresponding association relationship between the working parameter and the adjustment parameter, and is required to be written into the control program of the controller, and for a specific model, there is a specific correspondence relationship, and the steps in the control program of the specific writing controller include:
obtaining a second mapping relation corresponding to the static pressure and the air quantity of the centrifugal fan 100;
Obtaining a third mapping relation according to the second mapping relation and the working parameters, wherein the third mapping relation is a corresponding association relation between the working parameters and the air quantity;
obtaining the first mapping relation according to a third mapping relation and the adjustment parameters;
It should be noted that, when an air performance test is performed on a specific model, a second mapping relationship corresponding to static pressure and air volume can be obtained, a corresponding relationship between an operating parameter and air volume is obtained by flow conversion, namely a third mapping relationship, and the first mapping relationship is obtained according to the third mapping relationship and an adjusting parameter, so that the adjusting parameter is associated with the operating parameter.
Step S30, controlling the movement of the adjusting mechanism 3 according to the obtained actual adjusting parameters;
It should be noted that, after the actual adjustment parameters are obtained, the adjustment mechanism 3 may be directly driven to move, for example, the adjustment mechanism 3 adjusts the depth of the volute tongue 2 according to different working conditions, for example, resistance at the outlet of the fan is too large, airflow velocity at the volute tongue 2 is small, and static pressure is raised to overcome smoke discharging resistance on the premise of keeping air quantity due to smoke discharging requirement, at this time, the volute tongue 2 protruding from the middle is adopted, which is favorable for shunting airflow, reducing backflow at the volute tongue 2, and raising static pressure; the resistance at the outlet of the fan is moderate, and the comprehensive requirements of air quantity and static pressure are considered, and a volute tongue 2 with relatively flat middle is adopted; the resistance at the outlet of the fan is too small, the airflow velocity at the volute tongue 2 is large, high-frequency pneumatic noise can be generated when high-speed airflow impacts the volute tongue 2, so that the impact of high-speed airflow on the volute tongue 2 can be reduced and the noise can be reduced by adopting the volute tongue 2 with the middle relatively concave.
According to the invention, the actual working parameters of the centrifugal fan 100 are obtained, the actual adjustment parameters are obtained according to the obtained actual working parameters and the first mapping relation, and the movement of the adjusting mechanism 3 is controlled according to the obtained actual adjustment parameters, so that the movement of the volute tongue 2 is automatically adjusted by driving the adjusting mechanism 3 according to the working state of the centrifugal fan 100, and the effects of reducing noise and increasing static pressure are achieved in order to adapt to the situation that the air flow is unevenly distributed in the axial direction of the volute 1 under different working conditions.
In an embodiment, the plurality of volute tongue sections includes a first volute tongue section 21 and at least two second volute tongue sections 22 located at two sides of the first volute tongue section 21, in the protruding direction of the volute tongue 2, the first volute tongue section 21 has a first adjusting position protruding outward relative to the two second volute tongue sections 22, a second adjusting position recessed inward, and a transitional adjusting position located between the first adjusting position and the second adjusting position, and the first mapping relationship is:
When the working parameter meets a first preset condition, controlling the adjusting mechanism 3 to move so that the first volute tongue section 21 is positioned at the first adjusting position;
When the working parameter meets a second preset condition, controlling the adjusting mechanism 3 to move so that the first volute tongue section 21 is positioned at the second adjusting position;
When the working parameter meets a third preset condition, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is in the transition adjusting position.
In the embodiment of the invention, by setting different preset conditions, the movement of the adjusting mechanism 3 is controlled more accurately, the situation that the air flow is unevenly distributed in the axial direction of the volute 1 under different working conditions can be more adapted, the effects of reducing noise and increasing static pressure are achieved, and meanwhile, the first adjusting position, the second adjusting position and the transition position are not absolute positions and are an adjusting range.
It should be noted that, according to different working parameters, there are different preset conditions, and the following description is made by driving the adjusting mechanism 3 to move under different preset conditions under different working parameter conditions:
1. When the operation parameter is a fan outlet flow rate parameter, an example of control of the centrifugal fan 100 according to a specific model is as follows (flow rate v unit m/s):
When v e (0, 8), the flow rate parameter of the air outlet of the fan meets a first preset condition, and at this time, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is at the first adjusting position, that is, in the protruding direction of the volute tongue 2, the first volute tongue section 21 has a first adjusting position opposite to the two second volute tongue sections 22, and at the first adjusting position, the specific protruding amount of the protruding outside also needs to be finely adjusted;
When v e (13.5,16), the flow rate parameter of the air outlet of the fan meets a second preset condition, and at this time, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is at the second adjusting position, that is, in the protruding direction of the volute tongue 2, the first volute tongue section 21 has a second adjusting position that is concave relative to the two second volute tongue sections 22, and at the second adjusting position, the specific protruding amount of the concave needs to be finely adjusted;
When v epsilon (8,13.5), the flow speed parameter of the air outlet of the fan meets a third preset condition, and at the moment, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is positioned at the transition adjusting position, namely, a position between the first adjusting position and the second adjusting position;
2. When the operation parameter is a fan outlet static pressure parameter, a control example of the centrifugal fan 100 according to a specific model is as follows (static pressure Ps unit Pa):
When P s e [300,430 ]) the flow rate parameter of the air outlet of the fan meets a first preset condition, at this time, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is at the first adjusting position, that is, in the protruding direction of the volute tongue 2, the first volute tongue section 21 has a first adjusting position opposite to the protruding positions of the two second volute tongue sections 22, and the specific protruding amount of the protruding position needs to be finely adjusted;
When P s e [0,150 ]) the flow rate parameter of the air outlet of the fan meets a second preset condition, at this time, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is at the second adjusting position, that is, in the protruding direction of the volute tongue 2, the first volute tongue section 21 has a second adjusting position that is concave relative to the two second volute tongue sections 22, and in the second adjusting position, the specific protruding amount of the concave needs to be finely adjusted;
When P s E [150,300 ]), the flow speed parameter of the air outlet of the fan meets a third preset condition, and at the moment, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is positioned at the transition adjusting position, namely, a position between the first adjusting position and the second adjusting position;
3. When the operation parameter is a motor power parameter, a control example of the centrifugal fan 100 according to a specific model is as follows (power P unit W):
When P s e [135,190 ]) the flow rate parameter of the air outlet of the fan meets a first preset condition, at this time, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is at the first adjusting position, that is, in the protruding direction of the volute tongue 2, the first volute tongue section 21 has a first adjusting position opposite to the protruding positions of the two second volute tongue sections 22, and the specific protruding amount of the protruding position needs to be finely adjusted;
When P s e [240,255 ]) the flow rate parameter of the air outlet of the fan meets a second preset condition, at this time, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is at the second adjusting position, that is, in the protruding direction of the volute tongue 2, the first volute tongue section 21 has a second adjusting position that is concave relative to the two second volute tongue sections 22, and in the second adjusting position, the specific protruding amount of the concave needs to be finely adjusted;
when P s E [190,240 ]), the flow speed parameter of the air outlet of the fan meets a third preset condition, and at the moment, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is positioned at the transition adjusting position, namely, a position between the first adjusting position and the second adjusting position;
4. When the operation parameter is a rotor rotational speed parameter, a control example of the centrifugal fan 100 according to a specific model is as follows (rotational speed R unit rms):
When R e [1350,1450 ]) the flow rate parameter of the air outlet of the fan meets a first preset condition, at this time, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is at the first adjusting position, that is, in the protruding direction of the volute tongue 2, the first volute tongue section 21 has a first adjusting position opposite to the two second volute tongue sections 22, and at the first adjusting position, the specific protruding amount of the protruding outside needs to be finely adjusted;
when R e [1100,1250 ]) the flow rate parameter of the air outlet of the fan meets a second preset condition, at this time, the adjusting mechanism 3 is controlled to move so that the first volute tongue section 21 is at the second adjusting position, that is, in the protruding direction of the volute tongue 2, the first volute tongue section 21 has a second adjusting position that is concave relative to the two second volute tongue sections 22, and at the second adjusting position, the specific protruding amount of the concave needs to be finely adjusted;
When P s e [1250,1350 ]), the fan outlet flow rate parameter satisfies a third preset condition, and at this time, the adjusting mechanism 3 is controlled to move, so that the first volute tongue section 21 is located at the transition adjusting position, that is, a position between the first adjusting position and the second adjusting position.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (9)
1. A centrifugal fan, comprising:
The centrifugal fan comprises a shell structure, wherein the shell structure of the centrifugal fan comprises a volute, a volute tongue and an electric control adjusting mechanism, the volute is used for defining an installation cavity for installing a centrifugal wind wheel and an air outlet channel extending from one side of the installation cavity, the volute tongue is arranged at the junction of the air outlet channel and the installation cavity, extends towards the center of the air outlet channel and protrudes, the volute tongue is arranged in a telescopic manner in the protruding direction, and the electric control adjusting mechanism is used for correspondingly adjusting part of telescopic movement of the telescopic adjustment of the volute tongue;
the centrifugal wind wheel is rotatably arranged in the mounting cavity;
The static pressure measuring device is used for monitoring the static pressure parameter of the air outlet of the centrifugal fan; and
The control device is electrically connected with the static pressure measuring device and used for controlling the electric control adjusting mechanism to act according to the obtained static pressure parameters of the air outlet of the fan;
The volute is taken as the length direction of the volute along the circumferential extension direction of the air outlet channel, and the volute tongue comprises a plurality of volute tongue sections which are mutually connected along the length direction;
the volute tongue sections comprise a first volute tongue section and at least two second volute tongue sections positioned on two sides of the first volute tongue section;
In the protruding direction of the volute tongue, the first volute tongue section is provided with a first adjusting position, a second adjusting position and a transitional adjusting position, wherein the first adjusting position and the second adjusting position are opposite to each other, the second adjusting position is concave, and the transitional adjusting position is located between the first adjusting position and the second adjusting position;
the electric control adjusting mechanism adjusts the first volute tongue section to switch among the first adjusting position, the transition adjusting position and the second adjusting position in real time;
the electric control adjusting mechanism comprises a plurality of linear driving structures, all the volute tongue sections are correspondingly adjustable parts of the volute tongues, and all the volute tongue sections are in driving connection with the corresponding linear driving structures.
2. The centrifugal fan according to claim 1, wherein the static pressure measuring device comprises a second air outlet pipe arranged at an air outlet of the centrifugal fan, a second air speed pipe is arranged in the second air outlet pipe, and a second static pressure hole is arranged on the side wall of the second air speed pipe.
3. The centrifugal fan according to claim 1, wherein said volute tongue has a flow dividing surface formed at one end in a protruding direction thereof, and the flow dividing surface of each of said volute tongue sections is provided in a curved surface of an arc.
4. The centrifugal fan of claim 3 wherein the radius of curvature of the diverging surface of the first volute tongue section is less than the radius of curvature of the diverging surface of the second volute tongue section.
5. The centrifugal fan of claim 4, wherein the radius of curvature of the first volute tongue section is R1, and R1 is 5mm or less and 11mm or less; or alternatively
The curvature radius of the second volute tongue section is R2, and R2 is more than or equal to 3mm and less than or equal to 9mm.
6. The centrifugal fan of claim 5, wherein r1=8 mm; or r2=6 mm.
7. A range hood comprising a centrifugal fan as claimed in any one of claims 1 to 6.
8. A centrifugal fan air-out control method, said centrifugal fan being a centrifugal fan according to any one of claims 1 to 6, characterized in that said centrifugal fan air-out control method comprises the steps of:
acquiring static pressure parameters of an actual fan outlet of the centrifugal fan;
Obtaining an actual regulation parameter according to the obtained actual fan air outlet static pressure parameter and a first mapping relation, wherein the first mapping relation is a corresponding association relation between the fan air outlet static pressure parameter and the regulation parameter;
and controlling the electric control adjusting mechanism to move according to the obtained actual adjusting parameters.
9. An air-out control device of a centrifugal fan, which is characterized by comprising: a memory, a processor, and a centrifugal fan outlet control program stored on the memory and operable on the processor, the centrifugal fan outlet control program configured to implement the steps of the centrifugal fan outlet control method of claim 8.
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| CN202011029856.3A CN114251287B (en) | 2020-09-25 | 2020-09-25 | Centrifugal fan, air outlet control method and device and range hood |
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| CN114251284B (en) * | 2020-09-25 | 2024-04-26 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251283B (en) * | 2020-09-25 | 2024-04-26 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251285B (en) * | 2020-09-25 | 2024-04-26 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62118095A (en) * | 1985-11-18 | 1987-05-29 | Matsushita Electric Ind Co Ltd | Transverse flow blower device |
| JP2000234600A (en) * | 1998-12-15 | 2000-08-29 | Matsushita Refrig Co Ltd | Multiblade blower |
| JP2003042097A (en) * | 2001-07-31 | 2003-02-13 | Denso Corp | Centrifugal blower |
| CN105987024A (en) * | 2015-02-12 | 2016-10-05 | 宁波方太厨具有限公司 | Centrifugal fan with volute tongue capable of being adjusted dynamically |
| CN108869405A (en) * | 2018-06-05 | 2018-11-23 | 广东海信家电有限公司 | A kind of double air intake centrifugal blowers and range hood |
| CN110939606A (en) * | 2018-09-22 | 2020-03-31 | 宁波方太厨具有限公司 | Centrifugal fan, range hood applying centrifugal fan and control method |
| CN111156198A (en) * | 2019-08-31 | 2020-05-15 | 浙江理工大学 | Volute with stepped variable-radius volute tongue and centrifugal ventilator |
| CN111396366A (en) * | 2020-05-07 | 2020-07-10 | 中国电建集团贵州电力设计研究院有限公司 | Variable volute tongue centrifugal fan structure |
| CN114251282A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan and shell structure thereof, air outlet control method and device and range hood |
| CN114251283A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251284A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251285A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11193499B2 (en) * | 2017-12-15 | 2021-12-07 | Regal Beloit America, Inc. | Centrifugal blower assembly and method for assembling the same |
-
2020
- 2020-09-25 CN CN202011029856.3A patent/CN114251287B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62118095A (en) * | 1985-11-18 | 1987-05-29 | Matsushita Electric Ind Co Ltd | Transverse flow blower device |
| JP2000234600A (en) * | 1998-12-15 | 2000-08-29 | Matsushita Refrig Co Ltd | Multiblade blower |
| JP2003042097A (en) * | 2001-07-31 | 2003-02-13 | Denso Corp | Centrifugal blower |
| CN105987024A (en) * | 2015-02-12 | 2016-10-05 | 宁波方太厨具有限公司 | Centrifugal fan with volute tongue capable of being adjusted dynamically |
| CN108869405A (en) * | 2018-06-05 | 2018-11-23 | 广东海信家电有限公司 | A kind of double air intake centrifugal blowers and range hood |
| CN110939606A (en) * | 2018-09-22 | 2020-03-31 | 宁波方太厨具有限公司 | Centrifugal fan, range hood applying centrifugal fan and control method |
| CN111156198A (en) * | 2019-08-31 | 2020-05-15 | 浙江理工大学 | Volute with stepped variable-radius volute tongue and centrifugal ventilator |
| CN111396366A (en) * | 2020-05-07 | 2020-07-10 | 中国电建集团贵州电力设计研究院有限公司 | Variable volute tongue centrifugal fan structure |
| CN114251282A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan and shell structure thereof, air outlet control method and device and range hood |
| CN114251283A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251284A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251285A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
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