CN215256981U - Current collector, centrifugal fan and household appliance - Google Patents

Abstract

The utility model discloses a collector, centrifugal fan and domestic appliance. The current collector comprises at least two current collecting rings and a bracket. At least two current collecting rings are concentrically arranged, two adjacent current collecting rings form a current collecting area at intervals, and the current collecting area is used for allowing air flow to penetrate through a current collector; the support is connected with at least two collecting rings, and the current collector is configured to pre-swirl the airflow at the inlet along a preset direction by using the collecting rings and the support. The utility model discloses current collector, centrifugal fan and domestic appliance utilize two at least mass flow circles and support to improve the air current flow field of current collector entrance, can with the outer air current direction impeller entrance of current collector entrance in to carry out the prewhirl to the air current through two at least mass flow circles and support, make the air current have certain torsion angle ground get into in the impeller, so can avoid the production of near entry vortex and the revealing of air current.

Description

Current collector, centrifugal fan and household appliance

Technical Field

The utility model relates to a fan technical field, in particular to collector, centrifugal fan and domestic appliance.

Background

In the related art, because the multi-wing centrifugal fan has a larger axial width and has an inlet section effect, the unbalanced characteristic of the airflow in the axial direction is increased, and further, the aerodynamic characteristic and the noise characteristic of the whole multi-wing centrifugal fan are affected, so that the airflow field distribution of the multi-wing centrifugal fan near the inlet is very disordered and has obvious vortex. However, the current collector in the related art only adopts a single flow guiding structure, and cannot avoid the generation of vortex, thereby resulting in poor fan performance.

SUMMERY OF THE UTILITY MODEL

The utility model discloses embodiment provides a collector, centrifugal fan and domestic appliance.

The utility model discloses current collector includes two at least collection flow rings and support. The at least two current collecting rings are concentrically arranged, two adjacent current collecting rings form a current collecting area at intervals, and the current collecting area is used for allowing air flow to penetrate through the current collector; the support is connected with the at least two collecting rings, and the current collector is configured to pre-rotate the airflow at the inlet in a preset direction by using the collecting rings and the support.

In certain embodiments, the collector ring includes opposing inner and outer guide surfaces, the inner guide surface for deflecting gas flow through the inner guide surface by a first predetermined angle and the outer guide surface for deflecting gas flow through the outer guide surface by a second predetermined angle.

In some embodiments, the stent has an arcuate configuration along its length.

In some embodiments, the current collector includes a plurality of the brackets, each of the brackets includes a first connecting end and a second connecting end opposite to each other, the first connecting ends are respectively used for connecting the shell, and the second connecting ends are connected at the circle center.

In some embodiments, the collector ring defines a plurality of through holes for reducing airflow noise.

In some embodiments, the wind-facing surface of the brace is rounded.

In some embodiments, the collector ring comprises a windward end and a leeward end, the windward end having a width less than a width of the leeward end.

The centrifugal fan of the embodiment of the utility model comprises a volute, an impeller and a current collector of any one of the above embodiments. An impeller located within the volute, the impeller having an airflow inlet; the collector is mounted on the volute and is used for pre-rotating the airflow at the airflow inlet along a preset direction.

The household appliance of the embodiment of the utility model comprises the centrifugal fan of the above embodiment.

In some embodiments, the household appliance comprises a range hood.

The utility model discloses current collector, centrifugal fan and domestic appliance utilize two at least mass flow circles and support to improve the air current flow field of current collector entrance, can with the outer air current direction impeller entrance of current collector entrance in to carry out the prewhirl to the air current through two at least mass flow circles and support, make the air current have certain torsion angle ground get into in the impeller, so can avoid the production of near entry vortex and the revealing of air current.

Additional aspects and advantages of the invention 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 invention.

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 is a schematic structural view of a current collector according to an embodiment of the present invention;

fig. 2 is a rear view of a current collector of an embodiment of the present invention;

fig. 3 is another schematic view of a current collector according to an embodiment of the present invention;

fig. 4 is a partial schematic structural view of a centrifugal fan according to an embodiment of the present invention;

fig. 5 is another schematic structural view of a centrifugal fan according to an embodiment of the present invention;

fig. 6 is an exploded view of a centrifugal fan according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a centrifugal fan according to an embodiment of the present invention;

fig. 8 and 9 are scene diagrams of the related art;

FIG. 10 is an enlarged schematic view at X in FIG. 1;

fig. 11 is a schematic view of a scene of a current collector of an embodiment of the present invention;

fig. 12 is a schematic view of the structure of a current collector according to an embodiment of the present invention;

fig. 13 is a schematic structural view of a centrifugal fan according to an embodiment of the present invention;

fig. 14 is a schematic structural view of a current collector according to an embodiment of the present invention;

fig. 15 is a schematic cross-sectional view of the current collector of fig. 1 taken along direction a-a.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the embodiments of the present invention, and are not to be construed as limiting the embodiments of the present invention.

In embodiments of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of embodiments of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Embodiments of the present invention may repeat reference numerals and/or reference letters in the various examples for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, embodiments of the present invention provide examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 to 3, the current collector of the present invention includes at least two current collecting rings 10 and a support 20, the at least two current collecting rings 10 are concentrically disposed, two adjacent current collecting rings 10 form a current collecting area 101 at an interval, and the current collecting area 101 is used for allowing air to pass through the current collector 100. The support 20 connects at least two collecting rings 10, and the collector 100 is configured to pre-swirl the gas flow at the inlet in a predetermined direction using the collecting rings 10 and the support 20.

The utility model discloses still disclose a centrifugal fan 500, centrifugal fan 500 includes collector 100, spiral case 200 and impeller 300, and collector 100 installs on spiral case 200.

The utility model discloses current collector 100 of embodiment utilizes at least two mass flow circles 10 and support 20 to improve the air current flow field of current collector 100 entrance, can be with the outer air current direction impeller 300 entrance of current collector 100 entrance in to carry out prewhirl to the air current through at least two mass flow circles 10 and support 20, make the air current have certain torsion angle ground get into in the impeller 200, so can avoid the production of near vortex of entry and the revealing of air current.

Specifically, the current collecting ring 10 includes a ring structure, and the current collecting ring 10 of the ring structure has a circle center P in space, so that a plurality of current collecting ring 10 may be concentrically disposed. It is worth mentioning that the current collector 100 comprises at least two current collecting rings 10, that is, in some embodiments, the number of current collecting rings 10 may be 2, 3, 4 or more than 4, which is not limited herein.

It should be noted that the above examples and specific numerical values are for convenience of describing the implementation of the present invention, and should not be construed as limiting the scope of the present invention.

In some embodiments, the collecting rings 10 are uniformly distributed on the collector 100, the collecting rings 10 have an airflow guiding function, and can guide the airflow outside the collector 100 into the collector 100, and at the same time, the collecting rings 10 can guide the airflow outside the inlet into the inlet of the impeller 300 under the function of a special structure, that is, at least two collecting rings 10 and the support 20 pre-rotate the airflow to make the airflow enter the impeller 200 with a certain torsion angle, so that the generation of vortex near the inlet and the leakage of the airflow can be avoided, the flow condition can be changed, and the air intake efficiency can be improved.

In one embodiment, collector 100 can be mounted on a fan that includes fan blades therein. Collector 100 is uniformly distributed within the fan inlet diameter to direct the air flow within the fan inlet diameter to the fan blade inlet and pre-swirl the air flow so that it enters the fan blade in a predetermined direction. Therefore, the attack angle between the fan blade and the inlet of the fan blade can be reduced, so that the flow condition of airflow in the fan blade is improved, the inlet section effect is avoided, and the performance of the fan is improved; meanwhile, the collector 100 can prevent leakage of the air flow near the inlet, so that the air volume of the outlet air flow is increased.

It is worth mentioning that the inlet section effect means that near the inlet, there is a significant vortex due to the failure of the deflection angle of the air flow to twist in time, resulting in a decrease in performance.

In certain embodiments, the support 20 is connected to at least two of the current collectors 10 in a manner that includes a fixed connection and a removable connection. In some embodiments, the support 20 and the at least two current collectors 10 may be fixedly connected by welding, bonding, or the like. The holder 20 and the at least two collector rings 10 may be detachably connected by screwing, plugging, engaging, or the like, and the present invention is not limited thereto.

In some embodiments, the support 20 includes a special structure that enables the airflow at the inlet to be pre-swirled in a predetermined direction, that is, the support 20 includes a windward side, and the windward side has a special structure (i.e., a guide structure) and has a first guide surface and a second guide surface, and the first guide surface and the second guide surface are both capable of enabling the airflow at the inlet to be pre-swirled in the predetermined direction. The specific shape of the support 20 is not limited, and the support 20 includes an arc structure, a cylindrical structure, a rectangular structure, etc. in a length direction, and has a guide structure for pre-swirling the air flow at the inlet in a predetermined direction.

It is worth mentioning that the preset direction can be designed according to different and according to the structure of the electrical appliance to which the header 100 is mounted, without being limited thereto. The air flow may be drawn into the header 100 in a predetermined direction by the angle of the structure of the header 10 and the support 20 itself, with some deflection in the case of air flow drawing.

In certain embodiments, the current collector 10 and the support 20 are made of metal.

Specifically, the current collector ring 10 and the holder 20 are made of metal, that is, the current collector 100 is made of metal. The collector ring 10 and the bracket 20 made of metal materials have the characteristics of firmness, durability, high temperature resistance, easy cleaning and the like. And the current collecting ring 10 and the bracket 20 made of metal materials can be integrally formed in the process, so that the process flow is reduced. While the header 100 of a metallic material can be mounted on various electric appliances to satisfy various demands of users, for example: the method comprises the following steps of installing a current collector 100 made of metal materials on the range hood, wherein the current collector 100 is provided with a flow guide structure and can enable airflow to enter the air blower with a certain torsion angle, so that the current collector 100 can avoid vortex generation and airflow leakage and ensure the air suction performance of the range hood; install metallic material's collector 100 on the hair-dryer, the user can weather wet hair with the hair-dryer, and collector 100 has the water conservancy diversion structure and can make the air current have certain torsion angle and get into in the hair-dryer, so collector 100 can avoid the vortex to produce and the revealing of air current, can make the gas outlet air current amount of wind of hair-dryer increase.

Referring to fig. 4 to 7, the present invention also discloses a centrifugal fan 500, wherein the centrifugal fan 500 includes a collector 100, a volute 200 and an impeller 300, the impeller 300 is located in the volute 200, and the impeller 300 has an airflow inlet. The collector 100 is mounted on the volute 200 and is used to pre-swirl the air flow at the air flow inlet in a predetermined direction.

Referring to fig. 8 and 9 together, in the related art, the centrifugal fan includes a multi-blade centrifugal fan having a large axial width, thereby causing an increase in unbalance characteristics of the airflow in the axial direction, and consequently, aerodynamic characteristics and noise characteristics of the entire fan are affected. The airflow field distribution of the multi-wing centrifugal fan near the inlet is very disturbed, and leakage flow and vortex flow are generated in the inlet area, resulting in poor fan performance in the inlet area.

The centrifugal fan 500 of the embodiment of the present invention includes the current collector 100, and the airflow field at the inlet of the current collector 100 can be improved by using at least two current collecting rings 10 and the bracket 20, and the airflow outside the inlet of the current collector 100 can be guided into the inlet of the impeller 300, and the airflow is pre-rotated by at least two current collecting rings 10 and the bracket 20, so that the airflow enters the impeller 200 with a certain torsion angle, and the generation of eddy current near the inlet and the leakage of the airflow can be avoided.

The centrifugal fan 500 includes a multi-blade centrifugal fan, which is a fan having advantages of large air volume, low cost, etc. The impeller 300 used in the multi-blade centrifugal fan includes a multi-blade type fan blade. In some embodiments, the sirocco fan further includes a motor that supplies power to the sirocco fan and a transmission member that includes a main shaft, a pulley, a bearing, a v-belt, and the like. The multi-wing centrifugal wind can be made into a right-handed type and a left-handed type. When viewed from the front side of the motor, the impeller rotates clockwise, which is called a right-hand fan, and rotates counterclockwise, which is called a left-hand fan.

The multi-wing type fan blade comprises a plurality of blades, the number of the blades can be 8 to 16, and the number is not limited here. The volute 200 may include a volute plate, side plates, legs, etc., the volute 200 has a supporting and protecting function, and the collector 100 may be fixedly or detachably mounted on the volute 200. The collector 100 may be mounted on the volute 200 by welding, gluing, etc.; the spiral casing 200 may be detachably connected by screwing, engaging, or the like. In some embodiments, the impeller 300 includes blades, which may be forward-inclined blades or backward-inclined blades, so as to have a wider adaptation to the wind volume and pressure requirements, and the volute 200 may be internally muffled, so as to have a significant advantage in noise index.

It is worth mentioning that in some embodiments, the centrifugal fan 500 may be a double suction multiple-wing centrifugal fan (as shown in fig. 5) comprising two collectors 100, two volutes 200 and two impellers 300. The double-suction multi-wing centrifugal fan is provided with two airflow suction inlets and two airflow outlets, so that the working efficiency of the double-suction multi-wing centrifugal fan can be improved. The double-suction multi-wing centrifugal fan can also be provided with an encyclopedia motor, the motor can be arranged between two groups, and the motor can provide energy simultaneously, so that the cost can be saved, and the volume can be reduced.

Referring to fig. 10 and 11 together, in some embodiments, the collector 10 includes opposing inner and outer guide surfaces 11, 12, the inner guide surface 11 being configured to deflect the airflow passing through the inner guide surface 11 by a first predetermined angle, and the outer guide surface 12 being configured to deflect the airflow passing through the outer guide surface 12 by a second predetermined angle.

Specifically, the collector ring 10 includes an inner guide surface 11 and an outer guide surface 12, and the inner guide surface 11 and the outer guide surface 12 are disposed opposite to each other. The collector ring 10 of a ring structure has a center P in space, the inner guide surface 11 may be understood as a surface of the collector ring 10 close to the center P, and the outer guide surface 12 may be understood as a surface facing away from the center P. As shown in fig. 11, each collector ring 10 includes an inner guide surface 11 and an outer guide surface 12. The external air flow may be deflected by a first predetermined angle by the inner guide surface 11 and by a second predetermined angle by the outer guide surface 12, so that a prerotation may be performed by the air flow passing through the collector 100. It is noted that, in some embodiments, the first predetermined angle and the second predetermined angle may be the same, and are not limited herein.

In some embodiments, the stent 20 has an arcuate configuration along its length.

In particular, the arc-shaped support 20 can more stably fixedly connect a plurality of collecting rings 10, and the arc-shaped support 20 enables the collector 100 to have better airflow guiding effect and pre-swirl effect on the airflow.

Referring again to fig. 1, in some embodiments, the current collector 100 includes a plurality of brackets 20, each bracket 20 includes a first connection end 21 and a second connection end 22, the first connection end 21 and the second connection end 22 are disposed opposite to each other, the plurality of first connection ends 21 are respectively connected to the housing 30, and the plurality of second connection ends 22 are connected to the circle center P.

In particular, the header 100 may include a plurality of brackets 20. The number of the brackets 20 may be 2, 3, 4 or more than 4, which is not limited herein.

The header 100 includes a housing 30, and the housing 30 may be used to connect to an air inlet of an appliance. The case 30 passes through the bracket 20 to fix the plurality of collector coils 10. In certain embodiments, the header 100 includes a plurality of brackets 20, each bracket 20 including a first connection end 21 and a second connection end 22. In one embodiment, the header 100 includes 4 brackets 20, each of the 4 brackets 20 has an arc-shaped structure, and the 4 first connection ends 21 of the 4 brackets 20 are respectively connected to the housing 30 and are connected to the housing 30 with a certain uniform gap. The 4 second connection ends 22 of the 4 brackets 20 are connected at the circle center P. It will be appreciated that the 4 supports 20 are arranged in a "fan-like" configuration, which provides a better pre-swirl effect on the airflow.

It should be noted that the above examples and specific numerical values are for convenience of describing the implementation of the present invention, and should not be construed as limiting the scope of the present invention.

Referring to fig. 12 and 13, in some embodiments, the at least two current collecting coils 10 include three current collecting coils 10, and each two adjacent current collecting coils 10 are spaced apart by the same distance.

In one embodiment, the current collector 100 includes three current collecting rings 10, the three current collecting rings 10 are concentrically arranged, the radius of the current collecting ring 10a closest to the center P is R, the distance of the middle current collecting ring 10b from the center P is 2R, the distance of the outer current collecting ring 10c from the center P is 3R, that is, the diameter of the current collecting ring 10a closest to the center P is D1(D1 ═ 2R), the diameter of the middle current collecting ring 10b is D2(D2 ═ 4R), and the diameter of the outer current collecting ring 10c is D3(D3 ═ 6R). It should be noted that in some embodiments, the diameter of the hollow portion of the housing 30 near the center P is D4, and D4 may be equal to 8R, or smaller or larger than 8R, which is not limited herein.

Referring to fig. 14, in some embodiments, the collector ring 10 is formed with a plurality of through holes 13, and the through holes 13 are used for reducing airflow noise.

Specifically, the through hole 13 includes a silencing hole, that is, a plurality of silencing holes are formed in the collector 10, and in the case that the air flow passes through the collector 10, the plurality of silencing holes can generate a positive disturbance effect on a boundary layer of the air flow, so that noise generated by the air flow can be reduced. The flow ring 10 is provided with the through holes 13, so that the noise attenuation of the airflow flowing through the through holes 13 is obvious, the noise reduction effect is good, the noise in operation is greatly reduced, and the use performance is improved.

Referring to fig. 15, fig. 12 is a cross-sectional view taken along line a-a of fig. 1. in some embodiments, the windward side 23 of the support 20 is rounded.

Specifically, the support 20 includes a windward side 23, and the windward side 23 includes a rounded structure, which is understood to mean that the windward side 23 is in a shape similar to a circular arc. In some embodiments, the windward side 23 also includes a chamfered structure, which is not limited herein. The bracket 20 with the rounded structure on the windward side 23 can better guide the airflow to the inlet, and the corner positions of the bracket 20 with the rounded structure are not easy to collide and damage in use.

Referring again to fig. 15, in some embodiments, the collector 10 includes a windward end 14 and a leeward end 15, the windward end 14 having a width less than the width of the leeward end 15.

In some embodiments, the air flow enters from the windward end 14 of the collector ring 10, the windward end 14 is wider than the leeward end 15, so that the collector ring 10 has an air flow deflecting guide effect to enable the air flow to be deflected in direction at the outlet of the collector 100, and the windward end 14 is narrower so that the collector 100 has a noise reduction effect so that the air flow at the inlet does not "hit" the windward end 14.

The utility model also discloses a domestic appliance, domestic appliance includes centrifugal fan 500. The home appliances include, but are not limited to, a range hood, a blower, a vacuum cleaner, and the like having the centrifugal fan 500.

The utility model discloses embodiment's domestic appliance can utilize two at least mass flow circles 10 and support 20 to improve the air current flow field of collector 100 entrance, can be with collector 100 entry outer air current direction impeller 300 entrance in to carry out the prewhirl to the air current through two at least mass flow circles 10 and support 20, make the air current have certain torsion angle ground get into impeller 200 in, so can avoid near the production of entry vortex and the revealing of air current.

In the description of the present specification, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like 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 present invention. In this specification, schematic representations of the above terms 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.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A current collector, comprising:

the at least two current collecting rings are arranged concentrically, two adjacent current collecting rings form a current collecting area at intervals, and the current collecting area is used for allowing air flow to penetrate through the current collector;

a bracket connecting the at least two current collecting rings,

the collector is configured to pre-swirl an air flow at an inlet in a predetermined direction using the collector ring and the holder.

2. A current collector as claimed in claim 1, wherein said collector ring includes opposite inner and outer guide surfaces, said inner guide surface being adapted to deflect gas flow passing through said inner guide surface by a first predetermined angle and said outer guide surface being adapted to deflect gas flow passing through said outer guide surface by a second predetermined angle.

3. The current collector of claim 1, wherein the cradle is arcuate in configuration along its length.

4. The collector of claim 1, including a plurality of said brackets, each said bracket including first and second opposing connection ends, said first connection ends for connection to a housing, respectively, and said second connection ends connected at said center.

5. The collector of claim 1 wherein said collector ring defines a plurality of through holes for reducing noise from air flow.

6. The current collector of claim 1, wherein the windward surface of the cradle is of rounded configuration.

7. The current collector of claim 1, wherein said collector ring includes a windward end and a leeward end, said windward end having a width less than a width of said leeward end.

8. A centrifugal fan, comprising:

a volute;

an impeller located within the volute, the impeller having an airflow inlet;

the current collector of any one of claims 1-7, mounted on said volute and adapted to pre-swirl the gas flow at said gas flow inlet in a predetermined direction.

9. An electric household appliance, characterized in that it comprises a centrifugal fan according to claim 8.

10. The household appliance of claim 9, wherein the household appliance comprises a range hood.

Images