CN215830793U - Impeller, fan and range hood - Google Patents

Abstract

The embodiment of the utility model provides an impeller, a fan and a range hood, wherein the impeller comprises: a wheel disc; the blades are arranged on the wheel disc at intervals and comprise a plurality of first blades and a plurality of second blades, and the first blades and the second blades are distributed on two sides of the wheel disc; a first sawtooth section disposed on at least one first blade, the first sawtooth section including a plurality of first sawteeth; a second sawtooth section disposed on at least one second blade, the second sawtooth section including a plurality of second sawteeth; the windward area of the at least one first sawtooth is larger than the windward area of the at least one second sawtooth. The sawtooth sizes on the first blade and the second blade can be set according to the airflow flowing into the impeller from different sides, so that the flow in the impeller reaches the optimal state, the vortex in a fan system is obviously reduced, the pressure pulsation on the surface of the blade is reduced, and the noise of the whole machine is reduced on the premise of ensuring the static pressure of the air quantity.

Description

Impeller, fan and range hood

Technical Field

The embodiment of the utility model relates to the technical field of household appliances, in particular to an impeller, a fan and a range hood.

Background

Currently, a range hood is a kitchen appliance that sucks oil smoke, water vapor and the like generated during cooking and purifies the kitchen environment. The range hood is installed above a cooking range, can rapidly exhaust combustion waste gas and cooking oil fume, is discharged outdoors, reduces indoor pollution, purifies air, has the safety guarantee functions of gas defense and explosion prevention, and becomes essential kitchen equipment for modern families. And along with the improvement of user's demand, range hood needs to satisfy requirements such as big amount of wind, high static pressure and low noise.

In the related art, the sawteeth with the same size are arranged on the whole rear edge of the blade, and the difference of air inflow at two sides of the double-suction impeller is not considered, so that the flow inside the impeller has great difference, and the air suction and noise reduction effects of the range hood are poor.

SUMMERY OF THE UTILITY MODEL

Embodiments of the present invention are directed to solving at least one of the technical problems occurring in the prior art.

To this end, a first aspect of an embodiment of the present invention provides an impeller.

A second aspect of embodiments of the present invention provides a wind turbine.

A third aspect of embodiments of the present invention provides a range hood.

In view of this, according to a first aspect of embodiments of the present invention, there is provided an impeller comprising: a wheel disc; the blades are arranged on the wheel disc at intervals and comprise a plurality of first blades and a plurality of second blades, and the first blades and the second blades are distributed on two sides of the wheel disc; a first sawtooth section disposed on at least one first blade, the first sawtooth section including a plurality of first sawteeth; a second sawtooth section disposed on at least one second blade, the second sawtooth section including a plurality of second sawteeth; the windward area of the at least one first sawtooth is larger than the windward area of the at least one second sawtooth.

The impeller provided by the embodiment of the utility model comprises a wheel disc, a plurality of blades, a first sawtooth section and a second sawtooth section, wherein the blades are arranged on the wheel disc at intervals.

The plurality of blades comprise a plurality of first blades and a plurality of second blades, and the plurality of first blades and the plurality of second blades are distributed on the two sides of the wheel disc, when the motor drives the wheel disc to rotate, the wheel disc can drive the plurality of first blades and the plurality of second blades to synchronously rotate, thereby realizing air inlet on the two sides of the wheel disc, namely, the impeller is a double-suction impeller, namely, under the driving of the motor, air can be fed into the two sides of the impeller, thereby increasing the air inlet amount, and improving the purification efficiency of the range hood with the impeller.

The impeller comprises at least one first blade, wherein the first blade is provided with a first sawtooth section comprising a plurality of first sawteeth, the second blade is provided with a second sawtooth section comprising a plurality of second sawteeth, it can be understood that the wheel disc drives a plurality of blades to rotate, airflow enters the impeller and flows out of the impeller through an airflow channel between two adjacent blades in a process, a vortex can be generated, the first sawtooth section and the second sawtooth section are respectively arranged on the first blade and the second blade, the vortex in the running process of the impeller can be remarkably reduced, the pressure pulsation on the surface of the blade is reduced, the airflow flowing between the blades is improved, and the starting noise caused by the vortex can be reduced.

Further, the windward area of the at least one first serration is larger than the windward area of the at least one second serration. It can be understood that the air inlet amount on the two sides of the impeller is different, that is, the air inlet amount on the air inlet side where the first blade is located is different from the air inlet amount on the air inlet side where the second blade is located, so that the air flow entering the impeller from the two sides has a larger difference. The area of the windward side of at least one first sawtooth is larger than that of at least one second sawtooth, namely, the first sawtooth with larger size is arranged on the first blade on one side with larger air intake, the second sawtooth with smaller size is arranged on the second blade on the other side with smaller air intake, namely, sawtooth structures with different sizes are arranged on the blades on the two sides, so that the sizes of the sawteeth on the first blade and the second blade can be set according to the air flow entering the impeller from different sides, the air flow in the impeller reaches the optimal state, the vortex in a fan system is obviously reduced, the pressure pulsation on the surface of the blades is reduced, and the noise of the whole fan is reduced on the premise of ensuring the static pressure of the air volume.

In addition, can set up first sawtooth section and first blade as an organic whole structure, be about to the partly sawtooth structure that sets up into of first blade to can reduce the whole quality of impeller, improve the efficiency of impeller operation. And an organic whole structure has good mechanical properties, so can improve the joint strength between first sawtooth section and the first blade to can utilize first sawtooth section to realize effectively eliminating the vortex, and then improve complete machine noise. In addition, the integrated structure can also facilitate the processing and production of the blades, and further can reduce the production cost of the impeller.

Further, the second sawtooth section and the second blade can be arranged into an integral structure, namely, one part of the second blade is arranged into a sawtooth structure, so that the overall quality of the impeller can be reduced, and the running efficiency of the impeller is improved. And an organic whole structure has good mechanical properties, so can improve the joint strength between second sawtooth section and the second blade to can utilize the second sawtooth section to realize effectively eliminating the vortex, and then improve complete machine noise. In addition, the integrated structure can also facilitate the processing and production of the blades, and further can reduce the production cost of the impeller.

Wherein, first sawtooth section can set up on first blade is close to one end of rim plate, sets up a plurality of first sawtooth at the position of first blade leading edge promptly to can utilize a plurality of first sawtooth to prevent the production of vortex, and then reduce the aerodynamic noise because the vortex arouses in the source. In addition, first sawtooth section also can set up on first blade deviates from one end of rim plate, sets up a plurality of first sawtooth promptly in the position of first blade trailing edge to can utilize a plurality of first sawtooth to smash the large-scale vortex, and then effectively reduce the pneumatic noise that the trailing edge vortex drops and arouse. Of course, the first saw-tooth segments may be disposed on the leading edge and the trailing edge of the first blade, so that the generation of vortex can be further reduced, and the noise problem generated during the operation of the fan with the impeller can be reduced.

The second sawtooth section can set up on the second blade is close to one end of rim plate, sets up a plurality of second sawtooth at the position of second blade leading edge promptly to can utilize a plurality of second sawtooth to prevent the production of vortex, and then reduce the aerodynamic noise because the vortex arouses in the source. In addition, the second sawtooth section also can set up on the one end that the second blade deviates from the rim plate, sets up a plurality of second sawtooth at the position of second blade trailing edge promptly to can utilize a plurality of second sawtooth to smash the large-scale vortex, and then effectively reduce the pneumatic noise that the trailing edge vortex drops and arouse. Of course, the second saw-tooth segments may be disposed on the leading edge and the trailing edge of the second blade, so that the generation of vortex can be further reduced, and the noise problem generated during the operation of the fan with the impeller can be reduced.

It is worth mentioning that the outer contour of the wheel disc is circular, and the plurality of blades are arranged on the outer periphery of the wheel disc along the circumferential direction, so that the air inlet volume can be increased.

In a specific application, the first saw tooth and the second saw tooth may be at least one of a triangular saw tooth and a sinusoidal saw tooth, and may be specifically configured according to actual needs.

In addition, the impeller provided by the technical scheme of the utility model also has the following additional technical characteristics:

in one possible design, the windward area of each first serration is greater than the windward area of any one of the second serrations.

In the design, the windward area of each first sawtooth is limited to be larger than that of any one second sawtooth, namely, the windward area of each first sawtooth is larger than that of any one second sawtooth, so that the flow of air flow in the impeller can be further improved, the generation of vortex is reduced, and the aerodynamic noise caused by the vortex is further reduced.

It can be understood that the air inlet amount on the two sides of the impeller is different, that is, the air inlet amount on the air inlet side where the first blade is located is different from the air inlet amount on the air inlet side where the second blade is located, so that the air flow entering the impeller from the two sides has a larger difference. The area of the windward side of each first sawtooth is larger than that of any one second sawtooth, namely, the first sawtooth with larger size is arranged on the first blade on one side with larger air intake, the second sawtooth with smaller size is arranged on the second blade on the other side with smaller air intake, namely, sawtooth structures with different sizes are arranged on the blades on the two sides, so that the sizes of the sawteeth on the first blade and the second blade can be set according to the air flow entering the impeller from different sides, the flow in the impeller reaches the optimal state, the vortex in a fan system is obviously reduced, the pressure pulsation on the surface of the blades is reduced, and the noise of the whole fan is reduced on the premise of ensuring the static pressure of the air volume.

In one possible design, the wheel disc has an axis of rotation; the plurality of first sawteeth are arranged along the axial direction of the rotating axis, and the height of the first sawteeth protruding out of the first blade is a first tooth height; the plurality of second saw teeth are arranged along the axial direction of the rotating axis, and the height of the second saw teeth protruding out of the second blade is the second tooth height; wherein an average of the first plurality of tooth heights is greater than an average of the second plurality of tooth heights.

In this design, a plurality of first sawtooth are arranged along the axial of rotation axis, and a plurality of second sawtooth are arranged along the axial of rotation axis to can increase first sawtooth section and second sawtooth section and to the rectification area of air current, improve the treatment effect of first sawtooth section and second sawtooth section to the vortex, and then improve the noise reduction effect of the fan that has this impeller at the operation in-process.

Further, the height of the first sawtooth protruding out of the first blade is set as a first tooth height, and the height of the second sawtooth protruding out of the second blade is set as a second tooth height, wherein the average value of the plurality of first tooth heights is greater than the average value of the plurality of second tooth heights, that is, the protrusion height of the first sawtooth is greater than the protrusion height of the second sawtooth, so that the protrusion heights of the sawteeth on the first blade and the second blade can be further set according to the air flow entering the impeller from different sides. Specifically, the first blade on the side with the larger air intake is provided with the first saw teeth with the larger protrusion height, the second blade on the other side with the relatively smaller air intake is provided with the second saw teeth with the smaller protrusion height, namely, the saw tooth structures with different protrusion heights are arranged on the blades on the two sides, so that in the rotating process of the impeller, the flow in the impeller reaches the optimal state, the vortex in a fan system is obviously reduced, the pressure pulsation on the surfaces of the blades is reduced, and the noise of the whole machine is reduced on the premise of ensuring the static pressure of the air volume.

It should be noted that each first tooth height is greater than any second tooth height, which can further reduce the vortex in the fan system and reduce the pressure pulsation on the surface of the blade, and further reduce the noise of the whole machine on the premise of ensuring the static pressure of the air volume.

In one possible design, the end of the first serration adjacent to the first blade is a first root; the end part of the second sawtooth, which is close to the second blade, is a second tooth root; wherein an average of the first plurality of root axial widths is greater than an average of the second plurality of root axial widths.

In this design it is defined that the end of the first serration close to the first blade is the first tooth root, i.e. the position where the first serration is connected to the first blade is the tooth root of the first serration. The end part of the second sawtooth close to the second blade is a second tooth root, namely, the position where the second sawtooth is connected with the second blade is the tooth root part of the second sawtooth. Further, the average value of the plurality of first root axial widths is larger than the average value of the plurality of second root axial widths, that is, the tooth width of the first saw tooth is larger than the tooth width of the second saw tooth, so that the tooth widths of the saw teeth located on the first blade and the second blade can be further set according to the flow of the air flow entering the impeller from different sides. Specifically, the first blade on the side with the larger air intake is provided with the first saw teeth with the larger tooth width, the second blade on the other side with the relatively smaller air intake is provided with the second saw teeth with the smaller tooth width, namely, the saw tooth structures with different tooth widths are arranged on the blades on the two sides, so that in the rotating process of the impeller, the flow in the impeller reaches the optimal state, the vortex in a fan system is obviously reduced, the pressure pulsation on the surfaces of the blades is reduced, and the noise of the whole machine is reduced on the premise of ensuring the static pressure of the air volume.

It should be noted that, the axial width of each first tooth root is greater than the axial width of any second tooth root, which can further reduce the vortex in the fan system and reduce the pressure pulsation on the surface of the blade, and further reduce the noise of the whole machine on the premise of ensuring the static pressure of the air volume.

In one possible design, the average of the first tooth root axial widths d1 and the average of the first tooth heights h1 satisfy 0.5 ≦ d1/h1 ≦ 2; and/or the average value d2 of the axial widths of the plurality of second tooth roots and the average value h2 of the heights of the plurality of second teeth meet the condition that d2/h2 is more than or equal to 0.5 and less than or equal to 2.

In the design, the value range of the ratio of the axial width of the first tooth root of the first sawtooth to the first tooth height is limited, specifically, the average value d1 of the axial widths of the first tooth roots and the average value h1 of the first tooth heights meet the requirement that d1/h1 is more than or equal to 0.5 and less than or equal to 2, so that the vortex can be broken and prevented from being generated by the first sawtooth, the pressure pulsation between blades is reduced, the noise generated in the running process of the impeller is reduced, the structural strength of the first sawtooth is ensured, the service life of the first sawtooth section is prolonged, the noise generated by a fan system is reduced on the premise of ensuring the air volume and the static pressure of the fan with the impeller, and the overall noise of the range hood with the fan is improved.

The value range of the ratio of the axial width of the second tooth root of the second sawtooth to the height of the second tooth, specifically, the average value d2 of the axial widths of the second tooth roots and the average value h2 of the heights of the second tooth roots meet the requirement that d2/h2 is not less than 0.5 and not more than 2, so that the vortex can be broken and prevented from being generated by the second sawtooth, the pressure pulsation between blades is reduced, the noise generated in the running process of the impeller is reduced, the structural strength of the second sawtooth is ensured, the service life of the second sawtooth section is prolonged, the noise generated by a fan system is reduced on the premise that the air volume and the static pressure of the fan with the impeller are ensured, and the whole noise of the range hood with the fan is improved.

In a particular application, each first tooth height is in the size range 1mm to 4mm and each first tooth root has an axial width in the size range 1mm to 4 mm. The height of each second tooth is in the range of 1mm to 4mm, and the axial width of each second tooth root is in the range of 1mm to 4 mm.

Specifically, the first tooth height of each first saw tooth is set to be 2amm, the axial width of the first tooth root is 2amm, the second tooth height of each second saw tooth is 1amm, and the axial width of the second tooth root is 1amm, wherein the parameter a satisfies 1 ≦ a ≦ 2.

In one possible design, the first blade comprises a first circular arc section on a cross section perpendicular to the axial direction of the wheel disc, the length L1 of the first circular arc section and the average value h1 of the plurality of first tooth heights meet the condition that 0.02 is less than or equal to h1/L1 is less than or equal to 0.2; and/or the second blade comprises a second circular arc section on the cross section perpendicular to the axial direction of the wheel disc, the length L2 of the second circular arc section and the average value h2 of the heights of the second teeth meet the condition that h2/L2 is more than or equal to 0.02 and less than or equal to 0.2.

In the design, the first blade comprises a first arc section which is positioned on a cross section perpendicular to the axial direction of the wheel disc, the value range of the ratio of the length of the first arc section to the average value of a plurality of first tooth heights is limited, specifically, the length L1 of the first arc section and the average value h1 of the plurality of first tooth heights meet the requirement that the ratio is not less than 0.02 and not more than 0.2 of h1/L1, so that the vortex can be broken by the first saw teeth and prevented from generating, the pressure pulsation between the blades is reduced, the noise generated in the running process of the impeller is reduced, the structural strength of the first blade is ensured, the service life of the first blade is prolonged, the service life of the impeller is further prolonged, and the noise generated by a fan system is reduced on the premise of ensuring the air volume and the static pressure of the fan with the impeller, thereby improving the noise of the whole range hood with the impeller.

The second blade comprises a second arc section which is positioned on a cross section vertical to the axial direction of the wheel disc, and the value range of the ratio of the length of the second arc section to the average value of the heights of a plurality of second teeth is limited, specifically, the length L2 of the second arc section and the average value h2 of the heights of the plurality of second teeth meet the requirement that the ratio of the length of the second arc section to the average value of the heights of the plurality of second teeth is not less than 0.02 and not more than h2/L2 and not more than 0.2, so that the vortex can be broken by the second saw teeth, the generation of the vortex can be prevented, the pressure pulsation between the blades can be reduced, the noise generated in the running process of the impeller can be reduced, the structural strength of the second blade can be ensured, the service life of the second blade can be prolonged, the service life of the impeller can be prolonged, and the noise generated by a fan system can be reduced on the premise that the air volume and static pressure of the fan with the impeller can be ensured, and the noise of the whole range hood with the fan can be improved.

In one possible design, the length of each first vane in the axial direction is greater than the length of one second vane in the axial direction.

In this design, it is limited that the length of each first blade along the axial direction is greater than the length of one second blade along the axial direction, that is, the axial length of the first blade is relatively long, and the axial length of the second blade is relatively short, and under the drive of the motor, the wheel disc drives the plurality of blades to rotate, so that the air inflow on the two sides of the impeller is different. It can be understood that, install this impeller to the fan, and install this fan to range hood, range hood when installing on user's kitchen top of a kitchen range, the intake of range hood different sides is different, that is to say, the intake of impeller both sides is different, through setting up the longer first blade of axial length with the great one side of intake, set up the shorter second blade of axial length with the less one side of intake, can set up the axial length of rim plate both sides blade according to the difference of the different side intakes of difference, and then when guaranteeing range hood effective suction oil smoke or vapor, the axial length with the blade of the less one side of intake sets up shorter, and then can reduce the manufacturing cost of impeller.

In a particular application, the axial length of the first vane and the axial length of the second vane may be set to be approximately 2: 1. the specific setting can be carried out according to actual needs.

In one possible design, each first vane includes first and second opposing ends, the first end of the first vane being disposed closer to the axis of rotation than the second end of the first vane; the first sawtooth section is arranged on the first end of at least one first blade; and/or the first serration segment is provided on the second end of the at least one first blade.

In this design, each first blade is defined to include a first end close to the rotation axis and a second end away from the rotation axis, and it can be understood that the airflow enters the impeller and flows out through the airflow channel between two adjacent first blades, that is, the first end is an air inlet end and the second end is an air outlet end.

The first sawtooth section is arranged at the first end of at least one first blade, namely, the first sawtooth section can be arranged at the first end of part of the first blades, or the first sawtooth section can be arranged at the first end of all the first blades, and the first sawtooth section can be specifically arranged according to actual needs. Set up first sawtooth section through the first end at least one first blade to can utilize a plurality of first sawtooth to prevent the production of vortex, can reduce in the source because the aerodynamic noise that the vortex arouses, and then reduce the noise that the fan that has this impeller produced at the operation in-process, improve the user and experience the range hood that has this fan.

The first sawtooth section is arranged at the second end of at least one first blade, namely, the first sawtooth section can be arranged at the second end of part of the first blades, or the first sawtooth section can be arranged at the second end of all the first blades, and the first sawtooth section can be specifically arranged according to actual needs. The first sawtooth section is arranged at the second end of at least one first blade, so that a large-scale vortex can be smashed by utilizing a plurality of first sawteeth, and aerodynamic noise caused by falling of a rear edge vortex can be effectively reduced. And then reduce the noise that the fan that has this impeller produced in the operation process, improve the user and experience the range hood that has this fan.

In addition, the first sawtooth section can be arranged at the first end and the second end of the first blade, so that the generated vortex can be further broken when the vortex is further reduced, the noise effect of the fan with the impeller in the operation process is further improved, and the overall noise of the range hood with the fan is reduced on the premise of ensuring the air quantity and the static pressure.

In one possible design, each second vane includes first and second opposite ends, the first end of the second vane being disposed closer to the axis of rotation than the second end of the second vane; the second sawtooth section is arranged on the first end of at least one second blade; and/or the second serration segment is provided on the second end of the at least one second blade.

In this design, each second blade is defined to comprise a first end close to the rotation axis and a second end away from the rotation axis, it being understood that the air flow enters the impeller and exits through the air flow channel between two adjacent second blades, that is, the first end is an air inlet end and the second end is an air outlet end.

The second sawtooth section is arranged at the first end of at least one second blade, namely, the second sawtooth section can be arranged at the first end of part of the second blades, and the second sawtooth section can also be arranged at the first end of all the second blades, and the second sawtooth section can be specifically arranged according to actual needs. Set up the second sawtooth section through the first end at least one second blade to can utilize a plurality of second sawtooth to prevent the production of vortex, can reduce in the source because the aerodynamic noise that the vortex arouses, and then reduce the noise that the fan that has this impeller produced at the operation in-process, improve the user and experience the range hood that has this fan.

The second sawtooth section is arranged at the second end of at least one second blade, namely, the second sawtooth section can be arranged at the second end of part of the second blades, and the second sawtooth section can also be arranged at the second end of all the second blades, and the second sawtooth section can be specifically arranged according to actual needs. The second sawtooth section is arranged at the second end of at least one second blade, so that a large-scale vortex can be smashed by utilizing a plurality of second sawteeth, and the aerodynamic noise caused by the shedding of the vortex at the rear edge can be effectively reduced. And then reduce the noise that the fan that has this impeller produced in the operation process, improve the user and experience the range hood that has this fan.

In addition, the second sawtooth section can be arranged at the first end and the second end of the second blade, so that the generated vortex can be further broken when the vortex is further reduced, the noise effect of the fan with the impeller in the operation process is further improved, and the overall noise of the range hood with the fan is reduced on the premise of ensuring the air quantity and the static pressure.

In one possible design, each first vane is staggered with respect to one second vane.

In this design, it sets up with a second blade staggered to have injectd every first blade, that is to say, a plurality of first blades and a plurality of second blade setting of staggering each other, also be the extending direction of every first blade and lie in between the extending direction of two adjacent second blades, thereby in the impeller rotation process, can make the air current that flows out between two adjacent first blades, and the air current that flows out from between two adjacent second blades has certain phase difference, thereby when installing this impeller to the fan, the noise that the air current impacted the spiral shell of fan produced can weaken each other because of the existence of phase difference, further reduce the aerodynamic noise that the fan operation in-process produced, and then reduce the complete machine noise of the range hood that has this fan, improve the user and experience to this range hood's use.

In one possible design, each first blade is connected to a second blade; the impeller further comprises a positioning portion and a plurality of mounting holes, wherein the positioning portion is arranged at the joint of the first blade and the second blade, the mounting holes are arranged on the wheel disc at intervals, and each positioning portion is located in one mounting hole.

In this design, it is connected with a second blade to have injectd every first blade, specifically speaking, the impeller still includes location portion and a plurality of mounting hole, and wherein, location portion sets up in the junction of first blade and second blade, and location portion is located the mounting hole, that is to say, when installing the blade, passes the mounting hole with the blade to make location portion be located the mounting hole, thereby realize the preliminary location of blade, and then carry out the fixed of blade. Through setting up location portion, the installation location of blade can be convenient for, the installation effectiveness of improvement impeller.

In concrete application, location portion and first blade and second blade structure as an organic whole, it can be understood that an organic whole structure has good mechanical properties to can improve the structural strength of blade, prolong the life of blade, and then prolong the life of impeller. In addition, the integrated structure is convenient to process and produce, and further the production cost of the impeller can be reduced.

In one possible design, each first blade includes a first connection end and a second connection end, the first connection end of the first blade is connected with the disk; each second blade comprises a first connecting end and a second connecting end, and the first connecting end of each second blade is connected with the wheel disc; the impeller further comprises a first fixing piece and a second fixing piece, wherein the first fixing piece is connected with the second connecting end of each first blade, and the second fixing piece is connected with the second connecting end of each second blade.

In this design, it includes first link and second link to have injectd every first blade, wherein, the first link and the rim plate of first blade are connected, the second link and the first mounting of first blade are connected, thereby realize the fixed mounting of a plurality of first blades through the rim plate, and set up first mounting at the second link that first blade deviates from the rim plate, fix the free end of a plurality of first blades, effectively prevent that the impeller from rotating in-process blade and taking place to warp, the life of extension first blade, and then the life of extension impeller.

Further, every second blade includes first link and second link, wherein, the first link and the rim plate of second blade are connected, the second link and the second mounting of second blade are connected, thereby realize the fixed mounting of a plurality of second blades through the rim plate, and set up the second mounting at the second link that the second blade deviates from the rim plate, fix the free end of a plurality of second blades, prevent effectively that the impeller from rotating in-process blade and taking place to warp, prolong the life of second blade, and then prolong the life of impeller.

In one possible design, the first serrations are triangular serrations or sinusoidal serrations; and/or the second serrations are triangular serrations or sinusoidal serrations.

In the design, specific structures of the first saw teeth and the second saw teeth are limited, in detail, the first saw teeth are triangular saw teeth or sinusoidal teeth, and the second saw teeth are triangular saw teeth or sinusoidal teeth, so that the structures of the triangular saw teeth or the sinusoidal saw teeth can be utilized to break up vortex or prevent the generation of vortex, further the vortex in the running process of the impeller can be obviously reduced, the pressure pulsation on the surfaces of the blades is reduced, the airflow flowing between the blades is improved, and the starting noise caused by the vortex can be reduced.

According to a second aspect of the present invention, there is provided a fan, including an impeller provided in any one of the above technical solutions, so as to have all the beneficial technical effects of the impeller, which are not described herein again.

Further, the fan further comprises a volute, an air inlet and an air outlet, wherein the volute is provided with an accommodating cavity, the impeller is located in the accommodating cavity, and the air inlet and the air outlet are arranged on the volute and are communicated with the accommodating cavity respectively.

The fan provided by the embodiment of the utility model comprises an impeller, a volute, an air inlet and an air outlet, wherein the volute is provided with an accommodating cavity, and the impeller is positioned in the accommodating cavity. The air inlet and the air outlet are both arranged on the volute, the air inlet is communicated with the accommodating cavity, and the accommodating cavity is communicated with the air outlet, so that air flow can enter and exit.

Further, the impeller sets up the great first sawtooth of size on the great first blade of one side of intake, set up the less second sawtooth of size on the less second blade of opposite side of intake relatively, set up the sawtooth structure of unidimensional on the blade of both sides promptly, thereby can set up the sawtooth size that lies in on first blade and second blade according to the air current flow that enters into the impeller from the difference side, make the flow in the impeller reach the optimum, show the vortex that reduces in the fan system and reduce the pressure pulsation on blade surface, under the prerequisite of the static pressure of guaranteeing the amount of wind, reduce the whole machine noise.

According to a third aspect of the present invention, there is provided a range hood, including the fan provided in any one of the above technical solutions, so that all the beneficial technical effects of the fan are achieved, and details are not repeated herein.

Additional aspects and advantages in accordance with the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates one of the schematic structural diagrams of a wind turbine according to one embodiment of the present invention;

FIG. 2 shows one of the schematic structural views of an impeller according to one embodiment of the present invention;

FIG. 3 shows one of the structural schematics of a blade according to an embodiment of the utility model;

FIG. 4 shows a second schematic structural view of a blade according to an embodiment of the utility model;

FIG. 5 illustrates a second schematic structural view of a wind turbine according to an embodiment of the present invention;

FIG. 6 shows a second schematic structural view of an impeller according to an embodiment of the utility model;

FIG. 7 shows a third schematic structural view of a blade according to an embodiment of the utility model;

FIG. 8 shows a fourth schematic structural view of a blade according to an embodiment of the utility model;

FIG. 9 illustrates a third schematic structural view of a wind turbine according to an embodiment of the present invention;

FIG. 10 shows a third schematic structural view of an impeller according to an embodiment of the utility model;

FIG. 11 shows a fifth structural schematic view of a blade according to an embodiment of the utility model;

FIG. 12 shows a sixth schematic structural view of a blade according to an embodiment of the utility model;

FIG. 13 shows a fourth schematic structural view of an impeller according to an embodiment of the utility model;

FIG. 14 shows a fifth structural schematic of an impeller according to an embodiment of the present invention;

fig. 15 shows a sixth schematic structural view of an impeller according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 15 is:

100 impellers, 110 wheel discs, 120 blades, 121 first blades, 122 second blades, 130 first sawtooth sections, 131 first sawteeth, 140 second sawtooth sections, 141 second sawteeth, 150 positioning parts, 160 first fixing parts, 170 second fixing parts, 200 fans, 210 volutes and 211 accommodating cavities.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

Referring to fig. 1 to 15, an impeller 100, a fan 200 and a range hood provided according to some embodiments of the present invention will be described.

The first embodiment is as follows:

as shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15, an embodiment of a first aspect of the present invention provides an impeller 100, the impeller 100 including: a wheel disc 110; the blades 120 are arranged on the wheel disc 110 at intervals, the blades 120 include a plurality of first blades 121 and a plurality of second blades 122, and the first blades 121 and the second blades 122 are distributed on two sides of the wheel disc 110; a first saw tooth segment 130 disposed on the at least one first blade 121, the first saw tooth segment 130 including a plurality of first saw teeth 131; a second saw tooth segment 140 disposed on the at least one second blade 122, the second saw tooth segment 140 including a plurality of second saw teeth 141; wherein the windward area of the at least one first serration 131 is greater than the windward area of the at least one second serration 141.

The impeller 100 provided by the embodiment of the present invention includes a wheel disc 110, a plurality of blades 120, a first sawtooth section 130 and a second sawtooth section 140, specifically, the plurality of blades 120 are arranged on the wheel disc 110 at intervals, it can be understood that the impeller 100 further includes a motor, a portion of the wheel disc 110 is recessed to form an installation cavity, the motor is located in the installation cavity, the wheel disc 110 drives the plurality of blades 120 to rotate under the driving of the motor, when the impeller 100 is installed in a volute 210 of a fan 200, and the fan 200 is installed in a range hood, the range hood is implemented to suck oil smoke or water vapor, and other functions.

The plurality of blades 120 include a plurality of first blades 121 and a plurality of second blades 122, and a plurality of first blades 121 and a plurality of second blades 122 distribute in the both sides of rim plate 110, when motor drive rim plate 110 rotates, rim plate 110 can drive a plurality of first blades 121 and a plurality of second blades 122 synchronous rotation, thereby realize the both sides air inlet of rim plate 110, this impeller 100 is double suction impeller 100 promptly, also under the drive of motor, the equal air inlet in both sides of impeller 100, thereby increase the intake, improve the purification efficiency of the range hood that has this impeller 100.

The first sawtooth section 130 including the plurality of first sawteeth 131 is provided on at least one first blade 121, and the second sawtooth section 140 including the plurality of second sawteeth 141 is provided on the second blade 122, it can be understood that, when the plurality of blades 120 are rotated by the wheel disc 110, a vortex is generated in a process that an air flow enters the impeller 100 and flows out of the impeller 100 through an air flow passage between two adjacent blades 120, and by providing the first sawtooth section 130 and the second sawtooth section 140 on the first blade 121 and the second blade 122, respectively, the vortex during the operation of the impeller 100 can be significantly reduced, pressure pulsation on the surface of the blades 120 can be reduced, air flow between the blades 120 can be improved, and thus start-up noise caused by the vortex can be reduced.

Further, the windward area of the at least one first serration 131 is larger than the windward area of the at least one second serration 141. It can be understood that the air intake amount on both sides of the impeller 100 is different, that is, the air intake amount on the air intake side where the first blade 121 is located is different from the air intake amount on the air intake side where the second blade 122 is located, so that there is a large difference in the air flow entering the impeller 100 from both sides. The windward area of at least one first saw tooth 131 is larger than the windward area of at least one second saw tooth 141, that is, the first saw tooth 131 with larger size is arranged on the first blade 121 on the side with larger air intake, the second saw tooth 141 with smaller size is arranged on the second blade 122 on the other side with smaller air intake, that is, saw tooth structures with different sizes are arranged on the blades 120 on the two sides, so that the sizes of the saw teeth on the first blade 121 and the second blade 122 can be arranged according to the air flow entering the impeller 100 from different sides, the air flow in the impeller 100 reaches the optimal state, the vortex in the fan 200 system is remarkably reduced, the pressure pulsation on the surface of the blade 120 is reduced, and the noise of the whole machine is reduced on the premise of ensuring the static pressure of the air flow.

In addition, the first sawtooth section 130 and the first blade 121 may be provided as an integral structure, that is, a portion of the first blade 121 may be provided as a sawtooth structure, so that the overall quality of the impeller 100 may be reduced and the efficiency of the operation of the impeller 100 may be improved. And the integral structure has good mechanical property, so that the connection strength between the first sawtooth section 130 and the first blade 121 can be improved, the first sawtooth section 130 can be utilized to effectively eliminate eddy current, and the noise of the whole machine is improved. In addition, the integral structure can facilitate the processing and production of the blades 120, and further, the production cost of the impeller 100 can be reduced.

Further, the second sawtooth section 140 and the second blade 122 may be provided as an integral structure, that is, a portion of the second blade 122 may be provided as a sawtooth structure, so that the overall mass of the impeller 100 may be reduced, and the operation efficiency of the impeller 100 may be improved. And the integral structure has good mechanical property, so that the connection strength between the second sawtooth section 140 and the second blade 122 can be improved, the second sawtooth section 140 can be utilized to effectively eliminate eddy current, and the noise of the whole machine is improved. In addition, the integral structure can facilitate the processing and production of the blades 120, and further, the production cost of the impeller 100 can be reduced.

As shown in fig. 1, 2, 3, 4 and 13, the first saw tooth segment 130 may be disposed at an end of the first blade 121 close to the wheel disc 110, that is, a plurality of first saw teeth 131 are disposed at a position of a leading edge of the first blade 121, so that generation of vortex may be prevented by using the plurality of first saw teeth 131, thereby reducing aerodynamic noise due to the vortex at its source. In addition, the first sawtooth section 130 can also be arranged at one end of the first blade 121, which is away from the wheel disc 110, that is, the plurality of first sawteeth 131 are arranged at the position of the rear edge of the first blade 121, so that the large-scale vortex can be broken by using the plurality of first sawteeth 131, and further, the aerodynamic noise caused by the falling of the rear edge vortex can be effectively reduced. Of course, the first saw tooth segments 130 may be disposed on the leading and trailing edges of the first blade 121, so that the generation of vortex can be further reduced, and the noise problem generated during the operation of the fan 200 having the impeller 100 can be reduced.

As shown in fig. 5, 6, 7, 8 and 14, the second saw tooth segment 140 may be disposed at an end of the second blade 122 near the disk 110, that is, a plurality of second saw teeth 141 may be disposed at a position of a leading edge of the second blade 122, so that generation of a vortex may be prevented by the plurality of second saw teeth 141, thereby reducing aerodynamic noise due to the vortex at its source. In addition, the second saw tooth segment 140 may also be disposed at an end of the second blade 122 away from the wheel disc 110, that is, a plurality of second saw teeth 141 are disposed at a position of a trailing edge of the second blade 122, so that a large-scale vortex can be broken by the plurality of second saw teeth 141, and aerodynamic noise caused by falling of the trailing edge vortex can be effectively reduced.

As shown in fig. 9, 10, 11, 12 and 15, the second saw tooth segments 140 may be disposed on the leading and trailing edges of the second blade 122, so that the generation of vortex can be further reduced, and the noise problem generated during the operation of the wind turbine 200 having the impeller 100 can be reduced.

It should be noted that the outer contour of the disk 110 is circular, and the plurality of blades 120 are circumferentially disposed on the outer periphery of the disk 110, so that the intake air amount can be increased.

In a specific application, the first saw tooth 131 and the second saw tooth 141 may be at least one of a triangular saw tooth and a sinusoidal saw tooth, and may be specifically configured according to actual needs.

In a specific embodiment, further, the windward area of each first sawtooth 131 is larger than the windward area of any one of the second sawteeth 141.

In this embodiment, it is defined that the windward area of each first saw tooth 131 is larger than the windward area of any one of the second saw teeth 141, that is, the windward area of each first saw tooth 131 is larger than the windward area of any one of the second saw teeth 141, so that the flow of the air flow inside the impeller 100 can be further improved, the generation of the vortex can be reduced, and the aerodynamic noise caused by the vortex can be reduced.

It can be understood that the air intake amount on both sides of the impeller 100 is different, that is, the air intake amount on the air intake side where the first blade 121 is located is different from the air intake amount on the air intake side where the second blade 122 is located, so that there is a large difference in the air flow entering the impeller 100 from both sides. The windward area of each first sawtooth 131 is larger than that of any second sawtooth 141, that is, the first sawtooth 131 with a larger size is arranged on the first blade 121 on the side with a larger air intake, the second sawtooth 141 with a smaller size is arranged on the second blade 122 on the other side with a smaller air intake, that is, sawtooth structures with different sizes are arranged on the blades 120 on the two sides, so that the sawtooth sizes on the first blade 121 and the second blade 122 can be arranged according to the airflow flowing into the impeller 100 from different sides, the flow in the impeller 100 reaches the optimal state, the vortex in the fan 200 system is remarkably reduced, the pressure pulsation on the surface of the blade 120 is reduced, and the noise of the whole machine is reduced on the premise of ensuring the static pressure of the air volume.

Example two:

on the basis of the above embodiment, further, the wheel disc 110 has a rotation axis; the plurality of first saw teeth 131 are arranged along the axial direction of the rotation axis, and the height of the first saw teeth 131 protruding out of the first blade 121 is a first tooth height; the plurality of second saw teeth 141 are arranged along the axial direction of the rotation axis, and the height of the second saw teeth 141 protruding out of the second blade 122 is a second tooth height; wherein an average of the first plurality of tooth heights is greater than an average of the second plurality of tooth heights.

In this embodiment, the plurality of first saw teeth 131 are arranged along the axial direction of the rotation axis, and the plurality of second saw teeth 141 are arranged along the axial direction of the rotation axis, so that the rectifying area of the first saw tooth section 130 and the second saw tooth section 140 to the air flow can be increased, the treatment effect of the first saw tooth section 130 and the second saw tooth section 140 to the vortex flow can be improved, and the noise reduction effect of the fan 200 with the impeller 100 in the operation process can be improved.

Further, the height of the first saw tooth 131 protruding from the first blade 121 is set as a first tooth height, and the height of the second saw tooth 141 protruding from the second blade 122 is set as a second tooth height, wherein an average value of the plurality of first tooth heights is greater than an average value of the plurality of second tooth heights, that is, the protrusion height of the first saw tooth 131 is greater than the protrusion height of the second saw tooth 141, so that the protrusion heights of the saw teeth located on the first blade 121 and the second blade 122 can be further set according to the flow of the air flow entering the impeller 100 from different sides. Specifically, the first blade 121 on the side with a larger intake air amount is provided with the first saw teeth 131 with a larger protruding height, and the second blade 122 on the other side with a relatively smaller intake air amount is provided with the second saw teeth 141 with a smaller protruding height, that is, the blades 120 on both sides are provided with saw tooth structures with different protruding heights, so that in the rotation process of the impeller 100, the flow in the impeller 100 reaches the optimal state, the vortex in the fan 200 system is remarkably reduced, the pressure pulsation on the surfaces of the blades 120 is reduced, and the noise of the whole machine is reduced on the premise of ensuring the static pressure of the air amount.

It should be noted that each first tooth height is greater than any second tooth height, which can further reduce the vortex in the fan 200 system and reduce the pressure pulsation on the surface of the blade 120, and further reduce the noise of the whole machine on the premise of ensuring the static pressure of the air volume.

On the basis of the above embodiment, further, the end of the first saw tooth 131 near the first blade 121 is a first tooth root; the end of the second serration 141 near the second blade 122 is a second root; wherein an average of the first plurality of root axial widths is greater than an average of the second plurality of root axial widths.

In this embodiment, it is defined that the end of the first saw tooth 131 near the first blade 121 is a first tooth root, that is, the position where the first saw tooth 131 is connected to the first blade 121 is the tooth root of the first saw tooth 131. The end of the second saw tooth 141 near the second blade 122 is a second tooth root, that is, the position where the second saw tooth 141 is connected to the second blade 122 is the tooth root of the second saw tooth 141. Further, the average value of the plurality of first root axial widths is greater than the average value of the plurality of second root axial widths, that is, the tooth width of the first saw tooth 131 is greater than the tooth width of the second saw tooth 141, so that the tooth widths of the saw teeth located on the first blade 121 and the second blade 122 can be further set according to the flow of the air flow entering the impeller 100 from different sides. Specifically, the first blade 121 on the side with the larger intake air volume is provided with the first saw teeth 131 with the larger tooth width, and the second blade 122 on the other side with the relatively smaller intake air volume is provided with the second saw teeth 141 with the smaller tooth width, that is, the blades 120 on the two sides are provided with the saw tooth structures with different tooth widths, so that the flow in the impeller 100 reaches the optimal state in the rotation process of the impeller 100, the vortex in the fan 200 system is obviously reduced, the pressure pulsation on the surfaces of the blades 120 is reduced, and the noise of the whole machine is reduced on the premise of ensuring the static pressure of the air volume.

It should be noted that, the axial width of each first tooth root is greater than the axial width of any second tooth root, which can further reduce the vortex in the fan 200 system and reduce the pressure pulsation on the surface of the blade 120, and further reduce the noise of the whole machine on the premise of ensuring the static pressure of the air volume.

In a specific embodiment, further, the average value d1 of the axial widths of the first tooth roots and the average value h1 of the first tooth heights satisfy 0.5 ≦ d1/h1 ≦ 2; and/or the average value d2 of the axial widths of the plurality of second tooth roots and the average value h2 of the heights of the plurality of second teeth meet the condition that d2/h2 is more than or equal to 0.5 and less than or equal to 2.

In this embodiment, a value range of a ratio of an axial width of the first tooth root of the first saw tooth 131 to the first tooth height is defined, specifically, an average value d1 of the axial widths of the first tooth roots and an average value h1 of the first tooth heights satisfy 0.5 ≤ d1/h1 ≤ 2, so that the first saw tooth 131 can break up the vortex and prevent the vortex from generating, reduce pressure pulsation between the blades 120, reduce noise generated during operation of the impeller 100, ensure structural strength of the first saw tooth 131, prolong a service life of the first saw tooth section 130, and further reduce noise generated by the fan 200 system on the premise of ensuring the air volume and static pressure of the fan 200 having the impeller 100, thereby improving noise of the range hood having the fan 200.

The value range of the ratio of the axial width of the second tooth root of the second sawtooth 141 to the second tooth height, specifically, the average value d2 of the axial widths of the plurality of second tooth roots and the average value h2 of the plurality of second tooth heights satisfy that d2/h2 is more than or equal to 0.5 and less than or equal to 2, so that the second sawtooth 141 can break up vortex and prevent vortex generation, pressure pulsation among the blades 120 is reduced, noise generated in the operation process of the impeller 100 is reduced, meanwhile, the structural strength of the second sawtooth 141 is ensured, the service life of the second sawtooth section 140 is prolonged, and further, on the premise that the air volume and static pressure of the fan 200 with the impeller 100 are ensured, the noise generated by the fan 200 system is reduced, and the overall noise of the range hood with the fan 200 is improved.

In a particular application, each first tooth height is in the size range 1mm to 4mm and each first tooth root has an axial width in the size range 1mm to 4 mm. The dimension range of each second tooth height is 1mm

-4 mm, the axial width of each second tooth root ranging in size from 1mm to 4 mm.

Specifically, the first tooth height of each first saw tooth 131 is set to 2amm, the axial width of the first tooth root is 2amm, the second tooth height of each second saw tooth 141 is 1amm, and the axial width of the second tooth root is 1amm, wherein the parameter a, satisfies 1 ≦ a ≦ 2.

In another specific embodiment, further, the first blade 121 includes a first arc segment on a cross section perpendicular to the axial direction of the disk 110, the length L1 of the first arc segment and the average value h1 of the plurality of first tooth heights satisfy 0.02 ≦ h1/L1 ≦ 0.2; and/or the second blade 122 comprises a second circular arc section on a cross section perpendicular to the axial direction of the wheel disc 110, the length L2 of the second circular arc section and the average value h2 of the heights of the second teeth meet the condition that the ratio of 0.02 to h2/L2 is less than or equal to 0.2.

In this embodiment, the first blade 121 includes a first arc segment on a cross section perpendicular to an axial direction of the wheel disc 110, and a value range of a ratio of a length of the first arc segment to an average value of a plurality of first tooth heights is defined, and specifically, a length L1 of the first arc segment and an average value h1 of the plurality of first tooth heights satisfy 0.02 ≤ h1/L1 ≤ 0.2, so that the first blade 131 breaks up a vortex and prevents the vortex from generating, pressure pulsation between the blades 120 is reduced, noise generated in an operation process of the impeller 100 is reduced, structural strength of the first blade 121 is ensured, a service life of the first blade 121 is prolonged, a service life of the impeller 100 is further prolonged, and noise generated by a fan 200 system is reduced on the premise of ensuring an air volume and a static pressure of the fan 200 having the impeller 100, thereby improving overall noise of a range hood having the fan 200.

The second blade 122 includes a second arc section on a cross section perpendicular to the axial direction of the wheel disc 110, and defines a value range of a ratio of a length of the second arc section to an average value of a plurality of second tooth heights, specifically, a length L2 of the second arc section and an average value h2 of the plurality of second tooth heights, which satisfy 0.02 ≤ h2/L2 ≤ 0.2, so as to break up the vortex and prevent the vortex from generating at the second saw teeth 141, reduce pressure pulsation between the blades 120, reduce noise generated during the operation of the impeller 100, ensure structural strength of the second blade 122, prolong a service life of the second blade 122, further prolong a service life of the impeller 100, and reduce noise generated by the fan 200 system on the premise of ensuring the air volume and static pressure of the fan 200 having the impeller 100, thereby improving the overall noise of the range hood having the fan 200.

Example three:

as shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, and 15, in addition to the above-described embodiment, further, the length of each first vane 121 in the axial direction is greater than the length of one second vane 122 in the axial direction.

In this embodiment, it is defined that the length of each first blade 121 in the axial direction is greater than the length of one second blade 122 in the axial direction, that is, the axial length of the first blade 121 is relatively long, and the axial length of the second blade 122 is relatively short, and the wheel disc 110 drives the plurality of blades 120 to rotate under the driving of the motor, so that the air intake amounts on both sides of the impeller 100 are different. It can be understood that, the impeller 100 is installed to the fan 200, and the fan 200 is installed to the range hood, when the range hood is installed on the kitchen range top of the user, the air intake rate of different sides of the range hood is different, that is, the air intake rate of two sides of the impeller 100 is different, the first blade 121 with longer axial length is arranged on the side with larger air intake rate, the second blade 122 with shorter axial length is arranged on the side with smaller air intake rate, the axial length of the blades 120 on two sides of the wheel disc 110 can be set according to the difference of different side air intake rates, so as to ensure that the range hood can effectively suck the oil smoke or the water vapor, and simultaneously, the axial length of the blade 120 with smaller air intake rate is set to be shorter, thereby reducing the production cost of the impeller 100.

In a specific application, the axial length of the first blade 121 and the axial length of the second blade 122 may be set to be approximately 2: 1. the specific setting can be carried out according to actual needs.

Example four:

as shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15, further, on the basis of the above embodiments, each first blade 121 includes opposite first and second ends, and the first end of the first blade 121 is disposed closer to the rotation axis than the second end of the first blade 121; a first serrated section 130 is disposed on a first end of at least one first blade 121; and/or the first serration segment 130 is provided on the second end of at least one of the first blades 121.

In this embodiment, each first blade 121 is defined to include a first end close to the rotation axis and a second end away from the rotation axis, and it can be understood that the airflow enters the impeller 100 and flows out through the airflow channel between two adjacent first blades 121, that is, the first end is an air inlet end and the second end is an air outlet end.

The first sawtooth section 130 is disposed at the first end of at least one first blade 121, that is, the first sawtooth section 130 may be disposed at the first end of a part of the first blades 121, or the first sawtooth section 130 may be disposed at the first end of all the first blades 121, and may be specifically disposed according to actual requirements. The first saw tooth section 130 is arranged at the first end of the at least one first blade 121, so that the generation of vortex can be prevented by utilizing the first saw teeth 131, the aerodynamic noise caused by the vortex can be reduced fundamentally, the noise generated in the running process of the fan 200 with the impeller 100 is reduced, and the use experience of a user on the range hood with the fan 200 is improved.

The first sawtooth section 130 is disposed at the second end of at least one of the first blades 121, that is, the first sawtooth section 130 may be disposed at the second end of a part of the first blades 121, or the first sawtooth section 130 may be disposed at the second end of all the first blades 121, which may be specifically disposed according to actual requirements. By arranging the first sawtooth section 130 on the second end of the at least one first blade 121, the large-scale vortex can be broken by the plurality of first sawteeth 131, and aerodynamic noise caused by falling of the trailing edge vortex can be effectively reduced. Further, noise generated in the operation process of the fan 200 with the impeller 100 is reduced, and the use experience of a user on the range hood with the fan 200 is improved.

In addition, the first sawtooth section 130 may be disposed at the first end and the second end of the first blade 121, so as to further reduce the generation of the vortex, and simultaneously break the generated vortex, further improve the noise effect generated by the fan 200 with the impeller 100 in the operation process, and reduce the overall noise of the range hood with the fan 200 on the premise of ensuring the air volume and the static pressure.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15, on the basis of the above embodiment, further, each second blade 122 includes a first end and a second end opposite to each other, and the first end of the second blade 122 is disposed closer to the rotation axis than the second end of the second blade 122; a second serrated section 140 is disposed on a first end of at least one second blade 122; and/or a second serrated section 140 is disposed on a second end of at least one second blade 122.

In this embodiment, each second blade 122 is defined to include a first end close to the rotation axis and a second end away from the rotation axis, and it can be understood that the airflow enters the impeller 100 and flows out through the airflow channel between two adjacent second blades 122, that is, the first end is an air inlet end and the second end is an air outlet end.

The second sawtooth section 140 is disposed on the first end of at least one second blade 122, that is, the second sawtooth section 140 may be disposed on the first end of a part of the second blades 122, or the second sawtooth section 140 may be disposed on the first end of all the second blades 122, which may be specifically disposed according to actual requirements. The second saw tooth section 140 is arranged at the first end of the at least one second blade 122, so that the generation of vortex can be prevented by utilizing the second saw teeth 141, the aerodynamic noise caused by the vortex can be reduced fundamentally, the noise generated in the running process of the fan 200 with the impeller 100 is reduced, and the use experience of a user on the range hood with the fan 200 is improved.

The second sawtooth section 140 is disposed at the second end of at least one second blade 122, that is, the second sawtooth section 140 may be disposed at the second end of a part of the second blades 122, or the second sawtooth section 140 may be disposed at the second end of all the second blades 122, which may be specifically disposed according to actual requirements. By arranging the second sawtooth section 140 on the second end of the at least one second blade 122, the second sawtooth 141 can be used for breaking up the large-scale vortex, and the aerodynamic noise caused by the falling of the vortex at the rear edge can be effectively reduced. Further, noise generated in the operation process of the fan 200 with the impeller 100 is reduced, and the use experience of a user on the range hood with the fan 200 is improved.

In addition, the second saw-tooth segment 140 may be disposed at the first end and the second end of the second blade 122, so as to further reduce the generation of the vortex, and simultaneously break up the generated vortex, further improve the noise effect generated during the operation of the fan 200 with the impeller 100, and reduce the overall noise of the range hood with the fan 200 on the premise of ensuring the air volume and the static pressure.

As shown in fig. 13, 14 and 15, in a specific embodiment, each first blade 121 is further staggered with one second blade 122.

In this embodiment, it is defined that each first blade 121 is staggered with one second blade 122, that is, a plurality of first blades 121 are staggered with a plurality of second blades 122, that is, the extending direction of each first blade 121 is located between the extending directions of two adjacent second blades 122, so that the air flow flowing out from the space between two adjacent first blades 121 and the air flow flowing out from the space between two adjacent second blades 122 have a certain phase difference during the rotation of the impeller 100, therefore, when the impeller 100 is installed on the fan 200, the noises generated by the volute tongue of the volute 210 of the fan 200 due to the airflow impacting on the volute are mutually weakened due to the phase difference, the aerodynamic noise generated during the operation of the fan 200 is further reduced, thereby reducing the overall noise of the range hood with the fan 200 and improving the use experience of the user on the range hood.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15, in another specific embodiment, further, each first blade 121 is connected to one second blade 122; the impeller 100 further includes a positioning portion 150 and a plurality of mounting holes, wherein the positioning portion 150 is disposed at a connection position of the first blade 121 and the second blade 122, the plurality of mounting holes are disposed at intervals on the wheel disc 110, and each positioning portion 150 is located in one mounting hole.

In this embodiment, each first blade 121 is connected to one second blade 122, specifically, the impeller 100 further includes a positioning portion 150 and a plurality of mounting holes, wherein the positioning portion 150 is disposed at the connection position of the first blade 121 and the second blade 122, and the positioning portion 150 is located in the mounting holes, that is, when the blade 120 is mounted, the blade 120 is inserted through the mounting holes, and the positioning portion 150 is located in the mounting holes, so as to achieve the preliminary positioning of the blade 120, and thus, the blade 120 is fixed. By providing the positioning portion 150, the mounting and positioning of the blade 120 can be facilitated, and the mounting efficiency of the impeller 100 can be improved.

In a specific application, the positioning portion 150 is integrated with the first blade 121 and the second blade 122, and it can be understood that the integrated structure has good mechanical properties, so that the structural strength of the blade 120 can be improved, the service life of the blade 120 can be prolonged, and the service life of the impeller 100 can be prolonged. In addition, the integral structure is convenient for processing and production, and further, the production cost of the impeller 100 can be reduced.

Example five:

as shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15, further to the above embodiments, each of the first blades 121 includes a first connection end and a second connection end, the first connection end of the first blade 121 is connected to the disk 110; each second blade 122 includes a first connection end and a second connection end, the first connection end of the second blade 122 is connected with the wheel disc 110; the impeller 100 further includes a first fixture 160 and a second fixture 170, wherein the first fixture 160 is connected to the second connection end of each first blade 121, and the second fixture 170 is connected to the second connection end of each second blade 122.

In this embodiment, it is limited that each first blade 121 includes a first connection end and a second connection end, where the first connection end of the first blade 121 is connected to the wheel disc 110, and the second connection end of the first blade 121 is connected to the first fixing member 160, so that the first blades 121 are fixedly mounted on the wheel disc 110, and the first fixing member 160 is disposed at the second connection end of the first blade 121 away from the wheel disc 110, so as to fix the free ends of the first blades 121, thereby effectively preventing the blades 120 from deforming during the rotation of the impeller 100, prolonging the service life of the first blades 121, and further prolonging the service life of the impeller 100.

Further, each second blade 122 includes a first connection end and a second connection end, wherein the first connection end of the second blade 122 is connected with the wheel disc 110, and the second connection end of the second blade 122 is connected with the second fixing member 170, so that the fixed installation of the plurality of second blades 122 is realized through the wheel disc 110, the second fixing member 170 is arranged at the second connection end of the second blade 122 departing from the wheel disc 110, the free ends of the plurality of second blades 122 are fixed, the deformation of the blades 120 in the rotation process of the impeller 100 is effectively prevented, the service life of the second blades 122 is prolonged, and further, the service life of the impeller 100 is prolonged.

In a specific embodiment, further, the first saw-tooth 131 is a triangular saw-tooth or a sinusoidal tooth; and/or the second serrations 141 are triangular serrations or sinusoidal serrations.

In this embodiment, specific structures of the first saw tooth 131 and the second saw tooth 141 are defined, and in detail, the first saw tooth 131 is a triangular saw tooth or a sinusoidal tooth, and the second saw tooth 141 is a triangular saw tooth or a sinusoidal tooth, so that a vortex can be broken or prevented from being generated by using the structure of the triangular saw tooth or the sinusoidal saw tooth, and thus the vortex during the operation of the impeller 100 can be significantly reduced, pressure pulsation on the surface of the blades 120 can be reduced, airflow flowing between the blades 120 can be improved, and starting noise caused by the vortex can be reduced.

Example six:

as shown in fig. 1, 5 and 9, according to a second aspect of the present invention, there is provided a fan 200, including the impeller 100 provided in any of the above embodiments, so as to have all the beneficial technical effects of the impeller 100, and no further description is provided herein.

Further, the fan 200 further includes a volute 210, an air inlet and an air outlet, wherein the volute 210 is provided with an accommodating cavity 211, the impeller 100 is located in the accommodating cavity 211, and the air inlet and the air outlet are disposed on the volute 210 and are respectively communicated with the accommodating cavity 211.

The fan 200 provided by the embodiment of the utility model comprises an impeller 100, a volute 210, an air inlet and an air outlet, specifically, the volute 210 is provided with a containing cavity 211, and the impeller 100 is located in the containing cavity 211. The air inlet and the air outlet are both arranged on the volute 210, the air inlet is communicated with the accommodating cavity 211, and the accommodating cavity 211 is communicated with the air outlet, so that air flow can enter and exit.

Further, the impeller 100 is provided with the first saw-tooth 131 with a larger size on the first blade 121 on the side with a larger intake air amount, and is provided with the second saw-tooth 141 with a smaller size on the second blade 122 on the other side with a smaller intake air amount, that is, the saw-tooth structures with different sizes are provided on the blades 120 on the two sides, so that the sizes of the saw-teeth on the first blade 121 and the second blade 122 can be set according to the airflow flowing into the impeller 100 from different sides, the flow in the impeller 100 can reach an optimal state, the vortex in the fan 200 system can be remarkably reduced, the pressure pulsation on the surface of the blade 120 can be reduced, and the noise of the whole machine can be reduced on the premise of ensuring the static pressure of the air amount.

Example seven:

according to a third aspect of the present invention, a range hood is provided, which includes the fan 200 provided in any of the above embodiments, so that all the beneficial technical effects of the fan 200 are achieved, and details are not repeated herein.

In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (15)

1. An impeller, comprising:

a wheel disc;

the blades are arranged on the wheel disc at intervals and comprise a plurality of first blades and a plurality of second blades, and the first blades and the second blades are distributed on two sides of the wheel disc;

a first serrated section disposed on at least one of the first blades, the first serrated section including a plurality of first serrations;

a second serrated section disposed on at least one of the second blades, the second serrated section including a plurality of second serrations;

wherein the windward area of at least one of the first serrations is greater than the windward area of at least one of the second serrations.

2. The impeller according to claim 1,

the windward area of each first sawtooth is larger than that of any second sawtooth.

3. The impeller according to claim 1,

the wheel disc has an axis of rotation;

the first sawteeth are arranged along the axial direction of the rotating axis, and the height of the first sawteeth protruding out of the first blade is a first tooth height;

the plurality of second saw teeth are arranged along the axial direction of the rotating axis, and the height of the second saw teeth protruding out of the second blade is a second tooth height;

wherein an average of a plurality of the first tooth heights is greater than an average of a plurality of the second tooth heights.

4. The impeller according to claim 3,

the end part of the first sawtooth, which is close to the first blade, is a first tooth root;

the end part of the second sawtooth, which is close to the second blade, is a second tooth root;

wherein an average of a plurality of said first root axial widths is greater than an average of a plurality of said second root axial widths.

5. The impeller according to claim 4,

the average value d1 of the axial widths of the first tooth roots and the average value h1 of the first tooth heights meet the condition that d1/h1 is more than or equal to 0.5 and less than or equal to 2; and/or

The average value d2 of the axial widths of the second gear roots and the average value h2 of the heights of the second gears meet the condition that d2/h2 is more than or equal to 0.5 and less than or equal to 2.

6. The impeller according to claim 3,

the first blade comprises a first circular arc section on a cross section perpendicular to the axial direction of the wheel disc, the length L1 of the first circular arc section and the average value h1 of the first tooth heights meet the condition that h1/L1 is more than or equal to 0.02 and less than or equal to 0.2; and/or

The second blade comprises a second circular arc section on the cross section perpendicular to the axial direction of the wheel disc, the length L2 of the second circular arc section and the average value h2 of the heights of the second teeth meet the condition that h2/L2 is more than or equal to 0.02 and less than or equal to 0.2.

7. The impeller according to any one of claims 3 to 6,

the length of each first vane in the axial direction is greater than the length of one second vane in the axial direction.

8. The impeller according to any one of claims 3 to 6,

each first blade comprises a first end and a second end which are opposite to each other, and the first end of the first blade is arranged close to the rotation axis compared with the second end of the first blade;

the first serrated section is arranged on a first end of at least one first blade; and/or

The first serration segment is disposed on a second end of at least one of the first blades.

9. The impeller according to any one of claims 3 to 6,

each second vane includes first and second opposite ends, the first end of the second vane being disposed closer to the axis of rotation than the second end of the second vane;

the second serrated section is disposed on a first end of at least one of the second blades; and/or

The second serration segment is disposed on a second end of at least one of the second blades.

10. The impeller according to any one of claims 1 to 6,

each first blade and one second blade are arranged in a staggered mode.

11. The impeller according to any one of claims 1 to 6,

each of the first blades is connected with one of the second blades;

the impeller further includes:

the positioning part is arranged at the joint of the first blade and the second blade;

and the positioning parts are arranged in the wheel disc at intervals, and each positioning part is positioned in one mounting hole.

12. The impeller according to any one of claims 1 to 6,

each first blade comprises a first connecting end and a second connecting end, and the first connecting end of each first blade is connected with the wheel disc;

each second blade comprises a first connecting end and a second connecting end, and the first connecting end of each second blade is connected with the wheel disc;

the impeller further includes:

the first fixing piece is connected with the second connecting end of each first blade;

and the second fixing piece is connected with the second connecting end of each second blade.

13. The impeller according to any one of claims 1 to 6,

the first saw teeth are triangular saw teeth or sinusoidal teeth; and/or

The second saw teeth are triangular saw teeth or sinusoidal teeth.

14. A fan, comprising:

an impeller according to any one of claims 1 to 13;

the volute is provided with an accommodating cavity, and the impeller is positioned in the accommodating cavity;

and the air inlet and the air outlet are arranged on the volute and are respectively communicated with the accommodating cavity.

15. A range hood comprising the fan of claim 14.

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