CN117419069A - Impeller, fan and range hood - Google Patents
Impeller, fan and range hood Download PDFInfo
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- CN117419069A CN117419069A CN202210809272.0A CN202210809272A CN117419069A CN 117419069 A CN117419069 A CN 117419069A CN 202210809272 A CN202210809272 A CN 202210809272A CN 117419069 A CN117419069 A CN 117419069A
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- 238000000034 method Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000306 component Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification 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
- 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
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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
- F04D29/30—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
- F04D29/66—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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or 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
- F04D29/66—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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an impeller, a fan and a range hood, wherein the impeller comprises a wheel disc and a plurality of blades, and the blades are distributed at intervals along the circumferential direction of the wheel disc; at least one blade is provided with a saw tooth section. According to the invention, the blades in the fan system are subjected to sawtooth design, so that the flow condition in a blade path between the blades is improved, the flow impact at the front edge of the blades and the vortex separation condition at the rear edge of the blades are reduced, the noise of the whole machine is reduced, and the use experience of the range hood is improved. The manufacturing and installation are more efficient by reasonably designing the tooth tip angle and the installation distance of the non-sawtooth part, the production efficiency is improved, the working capacity of the blade is guaranteed, the air performance is not weakened, the front edge impact noise and the tail edge falling noise can be reduced, and the noise level of the whole machine is improved.
Description
Technical Field
The invention relates to the technical field of kitchen appliances, in particular to an impeller, a fan and a range hood.
Background
The range hood is a kitchen appliance for sucking oil smoke, water vapor and the like generated by cooking and purifying the kitchen environment. The centrifugal fan is widely applied to the range hood, has the advantages of compact structure, large pressure coefficient and the like, the multi-wing centrifugal impeller is used as a core component of the ventilator, has the advantages of multiple blades, short runner of the runner and the like, the performance of the centrifugal fan directly influences the overall performance of the range hood, and the working mode is that the impeller rotates at a high speed under the drive of a motor, air flow axially enters the runner from the impeller and is radially thrown out from the impeller under the action of centrifugal force. However, in the existing impeller structure, when the airflow enters the flow channel, the airflow is easy to impact with the front edge of the blade, and when the airflow is thrown out of the flow channel, the boundary layer of the airflow is easy to interfere with the tail edge of the impeller, so that large-scale vortex shedding is generated at the tail edge part, flow loss is caused, large pneumatic noise is generated, and the use experience of a range hood of a human user is influenced.
Disclosure of Invention
The main purpose of the present invention is to propose an impeller aimed at solving at least one technical problem mentioned in the background art.
In order to achieve the above object, the impeller provided by the invention is applied to a range hood with a fan, and the impeller comprises:
a wheel disc;
the blades are distributed at intervals along the circumferential direction of the wheel disc; at least one blade is provided with a sawtooth section;
the sawtooth section has crest and trough, the length of blade is L0, and adjacent two interval between the crest is L1, satisfies between L0 and the L1: L1/L0 is more than or equal to 0.01 and less than or equal to 0.04;
the width of the blade is H0, the distance between the wave crest and the wave trough is H1, and the requirements between H0 and H1 are satisfied: H1/H0 is more than or equal to 0.03 and less than or equal to 0.15.
In an embodiment, the wedge angle β of the saw tooth satisfies: beta is more than or equal to 20 degrees and less than or equal to 60 degrees.
In an embodiment, the blade has oppositely disposed first and second sides in the circumferential direction of the disk;
the sawtooth section is arranged on the first side;
and/or the sawtooth section is arranged on the second side.
In an embodiment, the wheel disc comprises an upper disc, a middle disc and a chassis, the blade is provided with a first connecting part and a second connecting part, the first connecting part is used for connecting the upper disc, and the second connecting part is used for connecting the chassis; the circumferential edge of the middle disc is provided with a clamping groove, and the blades are embedded into the clamping groove;
the sawtooth section is positioned between the first connecting part and the connecting part of the middle disc and the blade;
and/or the sawtooth section is positioned between the second connecting part and the connecting part of the middle disc and the blade.
In an embodiment, the blade further includes a non-serrated section, and in a length direction of the blade, a length of the non-serrated section is L2, which satisfies: l1 is less than or equal to L2 is less than or equal to 3 x L1.
In an embodiment, the serration section comprises a first serration and a second serration, the first serration having a greater over-wind area than the second serration.
In one embodiment, in the first saw tooth, a distance between two adjacent wave crests is L11; in the second saw tooth, the distance between two adjacent wave crests is L12; the method meets the following conditions: L11/L0 is more than or equal to 0.01 and less than or equal to 0.04,0.5, L12/L11 is more than or equal to 0.8.
In one embodiment, in the first serration, a spacing between the peaks and the valleys is H11; in the second serration, a spacing between the peaks and the valleys is H12; the method meets the following conditions: H11/H0 is more than or equal to 0.03 and less than or equal to 0.15, H12/H11 is more than or equal to 0.5 and less than or equal to 0.8.
In an embodiment, the plurality of first saw teeth are continuously arranged to form a first density saw tooth section, and the plurality of second saw teeth are continuously arranged to form a second density saw tooth section;
the second density sawtooth section is arranged in the middle of the blade, and the first density sawtooth section is arranged at two ends of the second density sawtooth section.
In an embodiment, the length of the first density serration element is less than or equal to the length of the second density serration element in the length direction of the blade.
In one embodiment, the peaks of the peaks are rounded; and/or the bottoms of the wave troughs are arranged in a round corner mode.
The invention also discloses a fan and a range hood using the fan, wherein the fan comprises the impeller, and the impeller comprises a wheel disc and a plurality of blades; a plurality of blades are arranged at intervals along the circumferential direction of the wheel disc; at least one blade is provided with a sawtooth section; the sawtooth section has crest and trough, the length of blade is L0, and adjacent two interval between the crest is L1, satisfies between L0 and the L1: L1/L0 is more than or equal to 0.01 and less than or equal to 0.04; the width of the blade is H0, the distance between the wave crest and the wave trough is H1, and the requirements between H0 and H1 are satisfied: H1/H0 is more than or equal to 0.03 and less than or equal to 0.15.
The technical scheme of the invention discloses an impeller, which comprises a wheel disc and a plurality of blades, wherein the blades are distributed at intervals along the circumferential direction of the wheel disc; at least one blade is provided with a saw tooth section. According to the invention, the blades in the fan system are subjected to sawtooth design, so that the flow condition in a blade path between the blades is improved, the flow impact at the front edge of the blades and the vortex separation condition at the rear edge of the blades are reduced, the noise of the whole machine is reduced, and the use experience of the range hood is improved. The manufacturing and installation are more efficient by reasonably designing the tooth tip angle and the installation distance of the non-sawtooth part, the production efficiency is improved, the working capacity of the blade is guaranteed, the air performance is not weakened, the front edge impact noise and the tail edge falling noise can be reduced, and the noise level of the whole machine 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 view of an impeller according to an embodiment of the present invention;
FIG. 2 is a schematic view of a mounting structure of a disk and blade;
FIG. 3 is a schematic view of an embodiment of the blade of FIG. 1;
FIG. 4 is an enlarged view of the left side of FIG. 3;
FIG. 5 is a schematic view of another embodiment of the impeller of FIG. 1;
FIG. 6 is an enlarged view of the right side of FIG. 5;
FIG. 7 is a schematic diagram of an embodiment of a 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 (as shown in the drawings), 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 the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet 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 invention provides an impeller.
In an embodiment of the present invention, as shown in fig. 1 to 7, the impeller 10 includes a wheel disc 100 and a plurality of blades 200; a plurality of the blades 200 are arranged at intervals along the circumferential direction of the wheel disc 100; at least one blade 200 is provided with a serration section 210; wherein the sawtooth section 210 has a peak and a trough, the length of the blade 200 is L0, the distance between two adjacent peaks is L1, and the following conditions are satisfied between L0 and L1: L1/L0 is more than or equal to 0.01 and less than or equal to 0.04; the width of the blade 200 is H0, and the distance between the crest and the trough is H1, where H0 and H1 satisfy: H1/H0 is more than or equal to 0.03 and less than or equal to 0.15.
Specifically, the impeller 10 is a part of the fan 1, the fan 1 is usually a centrifugal fan 1, the centrifugal fan 1 further usually comprises a volute 20, a mounting cavity for accommodating the impeller 10 is defined in the volute 20, an air suction inlet and an air outlet which are communicated with the mounting cavity are formed in the volute 20, the fan 1 is driven by a motor to rotate at a high speed by the working principle that air flows such as oil smoke and the like enter a flow channel from the air suction inlet, namely, the axial direction of the impeller 10, and are thrown out from the impeller 10 radially under the action of centrifugal force.
The impeller 10 includes a wheel disc 100 and a plurality of blades 200, the plurality of blades 200 are arranged at intervals along the circumferential direction of the wheel disc 100, and a ventilation gap is formed between two adjacent blades 200, so that the airflow sucked from the air suction inlet can flow out from the ventilation gap in the rotation process of the impeller 10. It will be appreciated that the impeller 10 further needs a driving motor, the wheel disc 100 generally has a bottom disc 130, a middle disc 120 and an upper disc 110, wherein the middle disc 120 is connected with the driving motor, a part of the middle disc 120 is recessed to form a containing cavity, the driving motor is arranged in the containing cavity, the wheel disc 100 drives the plurality of blades 200 to rotate under the driving of the motor, the impeller 10 is installed in the volute 20 of the fan 1, and when the fan 1 is installed in the range hood, the functions of pumping oil smoke or water vapor of the range hood are realized. The blade 200 is provided with a first connection part 220 and a second connection part 230, the first connection part 220 is used for connecting the upper plate 110, and the second connection part 230 is used for connecting the chassis 130; therefore, air intake at two sides of the wheel disc 100 is realized, namely, the impeller 10 is a double-suction impeller 10, and under the action of a driving motor, air can be taken in at two sides of the impeller 10, so that the air intake is increased, and the purification efficiency of the range hood with the impeller 10 is improved.
In other embodiments, the connection manner between the blade 200 and the middle disc 120 may be a threaded connection, for example, or a limiting slot is provided on the blade 200, and the circumferential edge of the middle disc 120 is embedded in the limiting slot.
In order to improve the air flow condition in the flow channel of the fan 1 and thereby achieve the effect of reducing noise, at least one blade 200 is provided with a saw tooth section 210, wherein, in the circumferential direction of the wheel disc 100, the blade 200 is provided with a first side 201 and a second side 202 which are oppositely arranged; wherein the first side 201 refers to the front edge of the blade, the second side 202 refers to the rear edge of the blade, and the serration section 210 is disposed on the first side 201; and/or the serration section 210 is provided on the second side 202. That is, at least one side of the leading edge of the blade 200 and the trailing edge of the blade 200 is provided with a saw tooth shaped corrugation. In addition, the serration section 210 may be located between the first connection part 220 and the connection of the center plate 120 and the blade 200; and/or, the serration section 210 is located between the second connection part 230 and the connection part of the middle disc 120 with the blade 200. It will be appreciated that during the rotation of the plurality of blades 200 by the wheel disc 100, the vortex is generated during the airflow entering the impeller 10 and flowing out of the impeller 10 through the airflow channel between two adjacent blades 200, and by providing the saw tooth section 210 on the first side 201 or the second side 202 of the blade 200, the vortex in the operation of the impeller 10 can be significantly reduced, the pressure pulsation on the surface of the blade 200 can be reduced, and the airflow between the blades 200 can be improved, so that the starting noise caused by the vortex can be reduced.
Generally, the serration segment 210 has peaks and valleys, however, in order to achieve the above-mentioned effect of reducing the start-up noise due to the eddy current, the sizes of the peaks and valleys cannot be large or small wirelessly, and based on this, it is verified through experiments that the length of the blade 200 is L0 and the interval between two adjacent peaks is L1, where L0 and L1 satisfy: L1/L0 is more than or equal to 0.01 and less than or equal to 0.04; the width of the blade 200 is H0, and the distance between the crest and the trough is H1, where H0 and H1 satisfy: H1/H0 is more than or equal to 0.03 and less than or equal to 0.15.
In this interval, the parameter setting of the blade 200 not only ensures that the working capacity of the blade 200 is not weakened, but also can reduce the front edge impact noise and the tail edge falling noise, and improve the noise level of the whole machine.
Preferably, the wedge angle β of the saw teeth satisfies: 20.ltoreq.beta.ltoreq.60, specifically, the beta angle includes, but is not limited to, 20 °, 22 °, 25 °, 26 °, 28 °, 30 °, 32 °, 34 °, 35 °, 36 °, 38 °, 40 °, 42 °, 44 °, 45 °, 46 °, 48 °, 50 °, 52 °, 54 °, 55 °, 56 °, 58 °, 60 °. The wedge angle beta can be measured directly by a protractor.
It will be appreciated that the term serration is derived from a tool for cutting objects, wherein the wedge angle refers to the angle between the rake face and the flank face, and in particular in this application, the angle between two adjacent faces, i.e. two adjacent serrations.
According to the invention, the blade 200 in the fan 1 system is subjected to sawtooth design, so that the flow condition in a blade path is improved, the flow impact of the front edge and the vortex separation condition of the rear edge are reduced, the noise of the whole machine is further reduced, and the kitchen use experience is improved. And the manufacturing and the installation are more efficient by reasonably designing the tooth tip angle and the installation distance of the non-sawtooth part, so that the production efficiency is improved. In addition, between L0 and L1: 0.01.ltoreq.L1/L0.ltoreq.0.04, and between H0 and H1: when H1/H0 is more than or equal to 0.03 and less than or equal to 0.15, the working capacity of the blade 200 is ensured, so that the air performance is not weakened, the front edge impact noise and the tail edge falling noise can be reduced, and the noise level of the whole machine is improved.
In an embodiment, referring to fig. 3, in order to ensure dynamic and static balance of the impeller 10, the blade 200 further includes a non-serrated section 240, and in the length direction of the blade 200, the length of the non-serrated section 240 is L2, which satisfies the following requirements: l1 is less than or equal to L2 is less than or equal to 3 x L1. Therefore, the overall dynamic balance, shaft jump and diameter jump of the blade 200 after being installed can be ensured, and the influence of the overlong non-sawtooth section 240 on the overall noise reduction level can be avoided.
It will be appreciated that the non-serration parts 240 are also disposed on the first side 201 and the second side 202 of the blade 200, that is, or, the blade 200 cannot be disposed entirely in the shape of the serration parts 210 in the length direction, and the impeller 10 is not allowed to be deformed greatly when manufactured with the edges of rollers, thereby affecting the dynamic and static balance of the impeller 10. Of course, there may be one or more non-serrated sections 240240 on the blade 200, which may be selected for use in accordance with the actual scenario, as is not limited herein.
Preferably, in other embodiments, the non-sawtooth section 240 is provided with the sawtooth section 210 at both ends; in order to ensure that the connection between the blade 200 and the middle plate 120 is provided, the blade 200 has sufficient strength, so as to ensure the service life of the blade 200, at least the joint between the middle plate 120 and the blade 200 is provided with the non-serrated section 240.
In another embodiment, considering that the flow conditions of the impeller 10 are different at each position in the axial direction of the fan 1, the flow condition changes less at the position where the blade 200 is close to the upper disc 110 and the bottom disc 130, and the flow condition changes more at the middle position of the blade 200, in order to ensure the working capability of the blade 200, the air is enabled, and a better noise reduction effect is achieved. In view of this, referring to fig. 5 and 6, in the present embodiment, the sawtooth section 210 of the blade 200 includes a first sawtooth 211 and a second sawtooth 212, the wind area of the first sawtooth 211 is larger than the wind area of the second sawtooth 212, wherein a plurality of first sawtooth 211 are continuously arranged to form a first density sawtooth section 210, and a plurality of second sawtooth 212 are continuously arranged to form a second density sawtooth section 210; the second density sawtooth section 210 is arranged in the middle of the blade 200, and the first density sawtooth section 210 is arranged at two ends of the second density sawtooth section 210. Thus, by providing the serration sections 210 in combination with the flow conditions, the working ability of the blade 200 is better ensured to allow air to be circulated, and a better noise reduction effect is achieved. Preferably, in order to achieve a better noise reduction effect. The length of the first density serration element 210 is less than or equal to the length of the second density serration element 210 in the length direction of the blade 200.
In a preferred embodiment, with continued reference to fig. 5 and 6, in the first saw tooth 211, a distance between two adjacent peaks is L11; in the second serration 212, a distance between two adjacent peaks is L12; the method meets the following conditions: L11/L0 is more than or equal to 0.01 and less than or equal to 0.04,0.5, L12/L11 is more than or equal to 0.8. Where L11/L0 includes, but is not limited to, 0.01, 0.02, 0.03, and 0.04, for example, when the length L0 of the blade 200 is 120mm, the distance between two adjacent peaks of the first serration 211 may be 1.2mm to 4.8mm, where L11 is a distance between two adjacent peaks. In the second saw teeth 212, the distance between two adjacent wave crests is L12 and is 0.6mm to 3.8mm.
In another embodiment, with continued reference to fig. 5 and 6, in the first serration 211, the spacing between the crest and the trough is H11; in the second serration 212, the spacing between the peaks and the valleys is H12; the method meets the following conditions: H11/H0 is more than or equal to 0.03 and less than or equal to 0.15, H12/H11 is more than or equal to 0.5 and less than or equal to 0.8. That is, H11/H0 includes, but is not limited to, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, and the like. For example, when the width H0 of the blade 200 is 30mm, the distance H11 between the crest and the trough of the first sawtooth 211 is 0.9mm to 4.5mm, and the distance H12 between the crest and the trough of the second sawtooth 212 is: 0.45 mm-3.6 mm.
In one embodiment, in order to facilitate processing and production, the peak tops of the peaks are provided with round corners; and/or the bottoms of the wave troughs are arranged in a round corner mode. Thus, the peak top of the peak is rounded, which can avoid unnecessary damage to workers who perform blade 200 installation during blade 200 installation, and improve the installability of the processing technology. In addition, the bottom of the trough is rounded, so that the stress at the bottom of the trough can be reduced, and the service life of the blade 200 is prolonged. Preferably, the rounded corner R has a value range of: r is more than or equal to 0.5mm and less than or equal to 1mm.
The invention also discloses a fan 1 and a range hood applying the fan 1, wherein the fan 1 comprises the impeller 10, and the impeller 10 comprises a wheel disc 100 and a plurality of blades 200; a plurality of the blades 200 are arranged at intervals along the circumferential direction of the wheel disc 100; at least one blade 200 is provided with a serration section 210; wherein the sawtooth section 210 has a peak and a trough, the length of the blade 200 is L0, the distance between two adjacent peaks is L1, and the following conditions are satisfied between L0 and L1: L1/L0 is more than or equal to 0.01 and less than or equal to 0.04; the width of the blade 200 is H0, and the distance between the crest and the trough is H1, where H0 and H1 satisfy: H1/H0 is more than or equal to 0.03 and less than or equal to 0.15.
The invention also provides a fan 1, the fan 1 comprises a volute 20 and an impeller 10, and the specific structure of the impeller 10 refers to the above embodiment, and since the fan 1 adopts all the technical schemes of all the embodiments, at least has all the beneficial effects brought by the technical schemes of the embodiments, and the details are not repeated here. Wherein the impeller 10 comprises a wheel disc 100 and a plurality of blades 200; a plurality of the blades 200 are arranged at intervals along the circumferential direction of the wheel disc 100; at least one blade 200 is provided with a serration section 210; wherein the sawtooth section 210 has a peak and a trough, the length of the blade 200 is L0, the distance between two adjacent peaks is L1, and the following conditions are satisfied between L0 and L1: L1/L0 is more than or equal to 0.01 and less than or equal to 0.04; the width of the blade 200 is H0, and the distance between the crest and the trough is H1, where H0 and H1 satisfy: H1/H0 is more than or equal to 0.03 and less than or equal to 0.15.
The invention also provides a range hood, the range hood is provided with the fan 1, the fan 1 comprises a volute 20 and an impeller 10, the specific structure of the impeller 10 refers to the embodiment, and as the fan 1 adopts all the technical schemes of all the embodiments, the range hood at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted. Wherein the impeller 10 comprises a wheel disc 100 and a plurality of blades 200; a plurality of the blades 200 are arranged at intervals along the circumferential direction of the wheel disc 100; at least one blade 200 is provided with a serration section 210; wherein the sawtooth section 210 has a peak and a trough, the length of the blade 200 is L0, the distance between two adjacent peaks is L1, and the following conditions are satisfied between L0 and L1: L1/L0 is more than or equal to 0.01 and less than or equal to 0.04; the width of the blade 200 is H0, and the distance between the crest and the trough is H1, where H0 and H1 satisfy: H1/H0 is more than or equal to 0.03 and less than or equal to 0.15.
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 (12)
1. An impeller for a range hood having a fan, comprising:
a wheel disc;
the blades are distributed at intervals along the circumferential direction of the wheel disc; at least one blade is provided with a sawtooth section;
the sawtooth section has crest and trough, the length of blade is L0, and adjacent two interval between the crest is L1, satisfies between L0 and the L1: L1/L0 is more than or equal to 0.01 and less than or equal to 0.04;
the width of the blade is H0, the distance between the wave crest and the wave trough is H1, and the requirements between H0 and H1 are satisfied: H1/H0 is more than or equal to 0.03 and less than or equal to 0.15.
2. The impeller of claim 1, wherein the wedge angle β of the serrations satisfies: beta is more than or equal to 20 degrees and less than or equal to 60 degrees.
3. The impeller of claim 2, wherein the blades have oppositely disposed first and second sides in a circumferential direction of the disk;
the sawtooth section is arranged on the first side;
and/or the sawtooth section is arranged on the second side.
4. The impeller of claim 3, wherein the wheel disc comprises an upper disc, a middle disc and a bottom disc, the blades are provided with a first connecting part and a second connecting part, the first connecting part is used for connecting the upper disc, and the second connecting part is used for connecting the bottom disc; the circumferential edge of the middle disc is provided with a clamping groove, and the blades are embedded into the clamping groove;
the sawtooth section is positioned between the first connecting part and the connecting part of the middle disc and the blade;
and/or the sawtooth section is positioned between the second connecting part and the connecting part of the middle disc and the blade.
5. The impeller of claim 4 wherein the blade further comprises a non-serrated section, the non-serrated section having a length L2 in the length direction of the blade that satisfies: l1 is less than or equal to L2 is less than or equal to 3 x L1.
6. The impeller of claim 3, wherein the serration section comprises a first serration and a second serration, the first serration having a greater wind-passing area than the second serration;
the first sawteeth are continuously arranged to form a first-density sawteeth section, and the second sawteeth are continuously arranged to form a second-density sawteeth section; the second density sawtooth section is arranged in the middle of the blade, and the first density sawtooth section is arranged at two ends of the second density sawtooth section.
7. The impeller of claim 6, wherein in said first serration, the spacing between adjacent two of said peaks is L11; in the second saw tooth, the distance between two adjacent wave crests is L12; the method meets the following conditions: L11/L0 is more than or equal to 0.01 and less than or equal to 0.04,0.5, L12/L11 is more than or equal to 0.8.
8. The impeller of claim 7 wherein in said first serrations, the spacing between said peaks and said valleys is H11; in the second serration, a spacing between the peaks and the valleys is H12; the method meets the following conditions: H11/H0 is more than or equal to 0.03 and less than or equal to 0.15, H12/H11 is more than or equal to 0.5 and less than or equal to 0.8.
9. The impeller of claim 6, wherein the length of the first density serration element is less than or equal to the length of the second density serration element in the length direction of the vane.
10. The impeller according to any one of claims 1 to 9, wherein peaks of the peaks are rounded; and/or the bottoms of the wave troughs are arranged in a round corner mode.
11. A fan comprising an impeller according to any one of claims 1 to 10.
12. A range hood comprising the blower of claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210809272.0A CN117419069A (en) | 2022-07-11 | 2022-07-11 | Impeller, fan and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210809272.0A CN117419069A (en) | 2022-07-11 | 2022-07-11 | Impeller, fan and range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117419069A true CN117419069A (en) | 2024-01-19 |
Family
ID=89528898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210809272.0A Pending CN117419069A (en) | 2022-07-11 | 2022-07-11 | Impeller, fan and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117419069A (en) |
-
2022
- 2022-07-11 CN CN202210809272.0A patent/CN117419069A/en active Pending
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