CN215293002U - Impeller assembly, multi-wing centrifugal fan and household appliance - Google Patents

Abstract

The utility model discloses an impeller subassembly, multi-wing centrifugal fan and domestic appliance. The impeller assembly comprises an impeller body and at least two blades which are arranged along the axial direction of the impeller body, and the at least two blades are surrounded to form a ventilation cavity; the at least two inner blades are arranged in the ventilation cavity and are respectively connected with the impeller body, and the at least two inner blades extend along the axial direction of the impeller body and rotate together with the impeller body. The utility model discloses embodiment's impeller subassembly is through at this internal two at least inner blades that set up of impeller for two at least inner blades effectively promote impeller subassembly's pressure capacity and reduce the requirement to impeller body's rigidity.

Description

Impeller assembly, multi-wing centrifugal fan and household appliance

Technical Field

The utility model relates to a fan technical field, in particular to impeller subassembly, multi-wing centrifugal fan and domestic appliance.

Background

The multi-wing centrifugal fan is widely applied to industrial equipment, such as a range hood product, due to the advantages of large air volume, low noise, low cost and the like.

However, in the prior art, since the multi-blade centrifugal fan has short and wide blades, the rigidity of the impeller is difficult to be ensured, and the wind pressure is low because the peripheral speed is low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses embodiment provides an impeller subassembly, multi-wing centrifugal fan and domestic appliance.

The impeller component comprises an impeller body, and at least two blades which are arranged along the axial direction of the impeller body and form a ventilation cavity in an enclosing manner;

the impeller comprises at least two inner blades, the at least two inner blades are arranged in the ventilation cavity and are respectively connected with the impeller body, and the at least two inner blades extend along the axial direction of the impeller body and rotate along with the impeller body.

In some embodiments, the impeller assembly further includes a wheel disc installed in the ventilation cavity and connected to the impeller body, the wheel disc extends along a radial direction of the impeller body, the at least two inner blades are installed on the wheel disc, the wheel disc divides the impeller body into a first section and a second section along an axial direction of the impeller body, and the second section is closer to the motor of the multi-blade centrifugal fan than the first section.

In certain embodiments, the first segment has a length of B1, the second segment has a length of B2, B1> B2, and B1, B2> 0.

In some embodiments, the disk divides the plenum into a first plenum and a second plenum, the at least two inner vanes being mounted within the first plenum.

In certain embodiments, the at least two inner vanes are disposed along a length of the first segment in the axial direction that is less than the length of the first segment.

In certain embodiments, the impeller assembly has an outer diameter of D1, the second segment has a length of B2, 0.4 × D1 ≦ B2 ≦ D1, and D1, B2> 0.

In some embodiments, the wheel disc is provided with a through hole along an axial direction of the impeller body, and the through hole is used for being matched with an output shaft of a motor of the multi-wing centrifugal fan.

In some embodiments, the number of the at least two blades is N1, the number of the at least two inner blades is N2, 2 ≦ N2<0.5 × N1, and N1 ≧ 6.

The utility model discloses multi-wing centrifugal fan of embodiment includes spiral case, motor and any above-mentioned embodiment impeller subassembly. The impeller assembly is installed in the volute, and the motor is connected with the impeller body and is used for driving the impeller assembly to rotate.

The household appliance of the embodiment of the utility model comprises the multi-wing centrifugal fan of the embodiment.

The utility model discloses embodiment's impeller subassembly, multi-wing centrifugal fan and domestic appliance set up two at least inner blades and this body coupling of impeller, can reduce the requirement to the rigidity of impeller body, improve the life-span of impeller body, and in addition, two at least inner blades are together rotatory with impeller body, increase the position of doing work to the air, have improved multi-wing centrifugal fan's acting capacity and wind pressure.

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 an impeller assembly according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of an impeller assembly of an embodiment of the present invention;

fig. 3 is a schematic structural view of a multi-blade centrifugal fan according to an embodiment of the present invention;

the main characteristic reference numbers:

the multi-blade centrifugal fan comprises an impeller assembly 100, an impeller body 10, a first section 10a, a second section 10b, fan blades 11, a ventilation cavity 12, a first containing cavity 12a, a second containing cavity 12b, reinforcing ribs 13, inner blades 20, a wheel disc 30, a through hole 31, a multi-blade centrifugal fan 500, a volute 200 and a motor 300.

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, an impeller assembly 100 according to an embodiment of the present invention includes an impeller body 10 and at least two inner blades 20. The impeller body 10 includes at least two blades 11 arranged along the axial direction of the impeller body 10, and at least two blades 11 enclose to form a ventilation cavity 12. At least two inner blades 20 are installed in the ventilation cavity 12 and respectively connected with the impeller body 10, and the at least two inner blades 20 extend along the axial direction of the impeller body 10 and rotate together with the impeller body 10.

The utility model discloses embodiment's impeller subassembly 100 sets up two at least inner blades 20 and is connected with impeller body 10, can reduce the requirement to impeller body 10's rigidity, improves impeller body 10's life-span, and in addition, two at least inner blades 20 are together rotatory with impeller body 10, increase the position to the air work, have improved multi-wing centrifugal fan 500's performance and wind pressure.

Specifically, the number of the at least two fan blades 11 is very large, and may be 2, 3, 4, 5, 6, 10, 20, 30, 40, 50, 100, and the like, and the specific number thereof is adjusted as needed, and is not limited specifically herein. The at least two blades 11 may be forward blades, backward blades, or straight blades, and are not limited specifically herein.

In some embodiments, referring to fig. 1, the impeller body 10 further includes a rib 13, and the rib 13 extends along a circumferential direction of the impeller body 10 and is connected to at least two blades 11. The reinforcing ribs 13 are connected with the at least two fan blades 11, so that the relative position relation between the fan blades 11 connected with the reinforcing ribs 13 is stable under the action of the reinforcing ribs 13, and the requirement on the rigidity of the at least two fan blades 11 is reduced. The number of the reinforcing ribs 13 may be 1, 2, 3, 4, and the like, and the number of the reinforcing ribs 13 may be adjusted according to the stiffness and the length of at least two fan blades 11, which is not limited herein.

The number of the at least two inner blades 20 is many, and may be 2, 3, 4, 5, 6, 10, 20, 30, 40, 50, 100, etc., and the specific number thereof is adjusted according to the need and is not limited herein. There are also many types of at least two inner blades 20, which may be forward blades, backward blades, or straight blades, and are not limited in this regard.

There are many ways for connecting the at least two inner blades 20 to the impeller body 10, for example, the at least two inner blades 20 are fixedly connected to one end of the at least two blades 11 near the center of the impeller body 10; for another example, at least two inner blades 20 are fixedly connected to the reinforcing rib 13, which is not necessarily exemplified herein. It should be noted that the at least two inner blades 20 are connected to the impeller body 10 and rotate together with the impeller body 10 means that the at least two inner blades 20 rotate synchronously with the impeller body 10, that is, the rotation period of the at least two blades 20 is the same as the rotation period of the impeller body 10.

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, referring to fig. 1 and 2, the impeller assembly 100 further includes a wheel disc 30, the wheel disc 30 is installed in the ventilation cavity 12 and connected to the impeller body 10, the wheel disc 30 extends along a radial direction of the impeller body 10, the at least two inner blades 20 are installed on the wheel disc 30, the wheel disc 30 divides the impeller body 10 into a first section 10a and a second section 10b along an axial direction of the impeller body 10, and the second section 10b is closer to the motor 300 of the multi-blade centrifugal fan 500 than the first section 10 a. In this way, the wheel disc 30 is connected to the impeller body 10 to support the impeller body 10, and in addition, the wheel disc 30 is connected to the at least two blades 11 to maintain the relative position between the at least two blades 11.

Preferably, when at least two interior blades 20 are installed on rim plate 30, extend along the radial direction of impeller body 10 until being connected with two at least flabellums 11, promptly with the chamber wall butt in ventilation chamber 12, so set up, not only make two at least interior blades 20 connect rim plate 30 and two at least flabellums 11, make the relative position relation of rim plate 30 and two at least flabellums 11 more stable, still make two at least interior blades 20's width broad, be favorable to improving two at least interior blades 20's pressurization effect.

Specifically, the shape of the wheel disc 30 is various, for example, the wheel disc 30 is a circular ring shape, the outer side of the wheel disc 30 is connected to at least two fan blades 11, respectively, and the inner side of the wheel disc 30 is used for connecting to the output shaft of the motor 300 of the multi-blade centrifugal fan 500; for another example, the wheel disc 30 includes a plurality of support rods extending along the radial direction of the impeller body 10, two ends of the plurality of support rods are respectively connected with the impeller body 10, and the middle portions of the plurality of support rods are connected to each other, which are not listed here.

It should be noted that the disk 30 is extended along the radial direction of the impeller body 10, which means that the disk 30 is extended along the radial direction of the impeller body 10, the disk 30 may be slightly inclined compared to the radial direction of the impeller body 10, and the disk 30 may also be bent, so that the bent portions do not extend along the radial direction of the impeller body 10 strictly, as long as the disk 30 is extended along the radial direction of the impeller body 10 approximately.

There are various ways in which the at least two inner blades 20 are mounted to the disk 30, for example, at least two inner blades 20 are mounted to the disk 30 on the side thereof adjacent to the first segment 10 a; for another example, at least two inner blades 20 are mounted on the face of the disk 30 adjacent to the second section 10 b; for another example, the wheel disc 30 is provided with a rotation protrusion protruding along the axial direction of the impeller body 10, and at least two inner blades 20 are mounted on the rotation protrusion.

In some embodiments, referring to fig. 2, the length of the first segment 10a is B1, the length of the second segment 10B is B2, B1> B2, and B1, B2> 0. The two ends along the axial direction of the impeller body 10 are air inlets of the impeller assembly 100, that is, the end of the first section 10a away from the second section 10b and the end of the second section 10b away from the first section 10a are both air inlets. The second section 10b is closer to the motor 300 of the sirocco fan 500 than the first section 10a, and the motor 300 of the sirocco fan 500 blocks the air inlet of the second section 10b, so that the air intake amount of the second section 10b is smaller than the air intake amount of the first section 10a without fan blocking, and further, the main pressurizing area of the whole impeller body 10 is not located in the middle of the impeller body 10 but located closer to the motor 300 than the middle of the impeller body 10. Set up B1> B2, be about the rim plate 30 and set up in the position that impeller body 10 is close to motor 300, be about the rim plate 30 and set up in the pressure boost region of impeller body 10 for install two at least interior blades 20 on rim plate 30 also be located the pressure boost region of impeller body 10, thereby improved two at least interior blades 20's work efficiency, played better pressure boost effect.

It should be noted that the length B1 of the first segment 10a means the approximate length of the first segment 10a in the axial direction of the impeller body 10, that is, the lengths of the first segment 10a at different positions in the axial direction of the impeller body 10 are not necessarily equal, and the length B1 means the approximate length of the first segment 10a in the axial direction of the impeller body 10. The length B2 of the second segment 10B means the approximate length of the second segment 10B in the axial direction of the impeller body 10, that is, the lengths of the second segment 10B at different positions in the axial direction of the impeller body 10 are not necessarily equal to each other, and the length B2 may be the approximate length of the second segment 10B in the axial direction of the impeller body 10.

In some embodiments, referring to fig. 2, the disk 30 divides the ventilation chamber 12 into a first chamber 12a and a second chamber 12b, and the at least two inner vanes 20 are installed in the first chamber 12 a. Because the motor 300 obstructs the air inlet of the second cavity 12b, the air volume of the first cavity 12a is larger than that of the second cavity 12b, and the at least two inner blades 20 are installed in the first cavity 12a, which is beneficial to improving the pressurization effect of the at least two inner blades 20.

Further, the length of the at least two inner blades 20 along the axial direction of the impeller body 10 is B3, and 0< B3 ≤ 2/3 × B1. So set up for the length of two at least inner vanes 20 can mainly be located the pressure boost region of impeller body 10, compromise pressure boost efficiency when playing good pressure boost effect.

Of course, the at least two inner blades 20 may also be installed in the second cavity 12b, the at least two inner blades 20 may also be installed in both the first cavity 12a and the second cavity 12b, and the specific installation positions of the at least two inner blades 20 are not limited herein.

It is noted that at least two of the inner lobes 20 may have different lengths, for example, a portion of inner lobe 20 may have a length 1/3 × B1, and a portion of inner lobe 20 may have a length 2/3 × B1; for another example, the length of partial inner leaflet 20 is 1/2 × B1, and the length of partial inner leaflet 20 is 1/4 × B1; for another example, at least two lobes are 2/3 × B1 in length, not to be taken as an example.

In some embodiments, referring to fig. 2, the outer diameter of the impeller assembly 100 is D1, the length of the second section 10B is B2, 0.4 × D1 ≦ B2 ≦ D1, and D1, B2> 0. If the length of the second section 10b is too small, the supercharging effect of the second section 10b is poor, and the second section cannot play a good supercharging function, and if the length of the second section 10b is too large, a larger swirl zone is formed or backflow is generated, so that the length of the second section 10b ensures the supercharging effect and simultaneously considers the supercharging efficiency. Similarly, the length of the first segment 10a cannot be too large or too small, and the length of B1 may also be in the range of 0.4 × D1 to D1.

In some embodiments, referring to fig. 2, the wheel disc 30 is provided with a through hole 31 along the axial direction of the impeller body 10, and the through hole 31 is used for matching with the output shaft of the motor 300 of the multi-blade centrifugal fan 500. So set up, the output shaft of motor 300 cooperates with rim plate 30 and drives rim plate 30 rotatory, and then drives two at least interior blades 20 of installing on rim plate 30 and rotate and the impeller body 10 who is connected with rim plate 30 and rotate to realize the effect that the output shaft of motor 300 drives impeller subassembly 100 pivoted.

The through holes 31 may be formed in a variety of ways, and may be formed integrally with the wheel disc 30 or may be formed by cutting portions of the wheel disc 30, to name a few. There are many shapes of the through-hole 31, which may be circular, square, triangular, etc., and the shape of the output shaft of the motor 300 is adapted to the shape of the through-hole 31. It should be noted that, when the through hole 31 is circular, the output shaft of the motor 300 may be in interference fit with the through hole 31 or the output shaft of the motor 300 may have a connection relationship with other positions of the wheel disc 30, so as to ensure that the output shaft of the motor 300 can drive the wheel disc 30 to rotate.

In some embodiments, the number of at least two blades 11 is N1, the number of at least two inner blades 20 is N2, 2 ≦ N2<0.5 × N1, and N1 ≧ 6. With such an arrangement, the number of the at least two inner blades 20 is not too small to achieve the effects of assisting the pressurization and reducing the requirement on the rigidity of the impeller assembly 100, and is not too large, so that the air entering the impeller assembly 100 is greatly obstructed by the at least two inner blades 20 to reduce the pressurization effect of the impeller assembly 100, that is, the at least two inner blades 20 take the pressurization effect and the efficiency into consideration.

Referring to fig. 3, the present invention further discloses a multi-blade centrifugal fan 500. The multi-blade centrifugal fan 500 may be a left-handed centrifugal fan or a right-handed centrifugal fan. The impeller rotates clockwise from the front view of one side of the motor, and is called a right-handed centrifugal fan, and rotates anticlockwise, and is called a left-handed centrifugal fan.

The multi-wing centrifugal fan 500 includes a volute 200, a motor 300, and an impeller assembly 100.

Specifically, the scroll casing 200 may include a scroll plate, side plates, support legs, and the like, and the scroll casing 200 has a supporting and protecting function.

Motor 300 powers multi-bladed centrifugal fan 500, driving impeller assembly 100 in rotation.

The impeller assembly 100 is mounted in the volute 200, and the motor 300 is connected to the impeller body 10 and drives the impeller assembly 100 to rotate. It should be noted that the motor 300 is connected to the impeller body 10, and may be directly connected or indirectly connected, as long as the motor 300 can drive the impeller body 10 to rotate, and is not limited herein.

It is worth mentioning that in some embodiments, the centrifugal fan may be a double suction multiple wing centrifugal fan 500, the double suction multiple wing centrifugal fan 500 includes two volutes 200 and two impeller assemblies 100, and the impeller assemblies 100 correspond to the volutes 200 one by one. Preferably, the double suction multiple-wing centrifugal fan 500 includes a motor 300, and the motor 300 is disposed between the two volutes 200 and the two impeller assemblies 100. In this way, the motor 300 can simultaneously power two impeller assemblies 100, effectively saving cost and reducing the volume of the double suction multiple-wing centrifugal fan 500. It should be noted that the double-suction multi-blade centrifugal fan 500 has four airflow inlets and two airflow outlets, that is, two airflow inlets are disposed at two ends of the impeller assembly 100, and that there are four airflow inlets in two impeller assemblies 100. It should be noted that the two airflow inlets of the double-suction multi-blade centrifugal fan 500 close to the motor 300 are obstructed by the motor 300, so that the two airflow inlets of the double-suction multi-blade centrifugal fan 500 close to the motor 300 have a smaller airflow than the two airflow inlets of the double-suction multi-blade centrifugal fan 500 far from the motor 300. In addition, the double-suction multi-blade centrifugal fan 500 near the two airflow inlets of the motor 300 can also be used for ventilating and radiating the motor 300, so as to reduce the temperature of the motor 300.

The utility model discloses embodiment mode still discloses a domestic appliance, and is concrete, and domestic appliance includes but not limited to oil smoke equipment, integrated kitchen etc. have the electrical apparatus of oil extraction cigarette energy supply and hair-dryer, dust catcher etc. have multi-wing centrifugal fan 500's electrical apparatus. The household appliance is taken as an oil fume device for explanation. The household appliance may be an upper-row kitchen appliance, a lower-row kitchen appliance, or a side-row kitchen appliance, which is not limited specifically herein.

Specifically, this household electrical appliances includes multi-wing centrifugal fan 500, this household electrical appliances still includes but not limited to the box, the guide plate, subassembly such as check valve, the guide plate, multi-wing centrifugal fan 500 and check valve are all installed on the box, the oil smoke passes through the guide plate and gets into the box, multi-wing centrifugal fan 500 work that sets up in the box, the oil smoke is inhaled multi-wing centrifugal fan 500 and is discharged the entering check valve from multi-wing centrifugal fan 500's air outlet under multi-wing centrifugal fan 500's centrifugal force effect, the check valve prevents that the oil smoke from flowing backward multi-wing centrifugal fan 500, thereby realize the discharge of oil smoke. It is understood that the check valve is a valve in which the opening and closing member is a circular valve flap and acts by its own weight and pressure of the medium to block the reverse flow of the medium. The check valve may be a lift check valve and a swing check valve.

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. An impeller assembly for a multi-wing centrifugal fan, the impeller assembly comprising:

the impeller comprises an impeller body and a fan blade, wherein the impeller body comprises at least two fan blades which are arranged along the axial direction of the impeller body, and the at least two fan blades are surrounded to form a ventilation cavity;

the impeller comprises at least two inner blades, the at least two inner blades are arranged in the ventilation cavity and are respectively connected with the impeller body, and the at least two inner blades extend along the axial direction of the impeller body and rotate along with the impeller body.

2. The impeller assembly of claim 1 further comprising a wheel disk, wherein the wheel disk is mounted in the ventilation cavity and connected to the impeller body, the wheel disk extends along a radial direction of the impeller body, the at least two inner blades are mounted on the wheel disk, the wheel disk divides the impeller body into a first section and a second section along an axial direction of the impeller body, and the second section is closer to the motor of the multi-wing centrifugal fan than the first section.

3. The impeller assembly of claim 2, wherein the first segment has a length of B1, the second segment has a length of B2, B1> B2, and B1, B2> 0.

4. The impeller assembly of claim 2 wherein said disk divides said plenum into a first plenum and a second plenum, said at least two inner vanes being mounted in said first plenum.

5. The impeller assembly of claim 2, wherein the at least two inner vanes are disposed along a length of the first segment in an axial direction that is less than a length of the first segment.

6. The impeller assembly of claim 2, wherein the outer diameter of the impeller assembly is D1, the length of the second section is B2, 0.4 x D1 ≦ B2 ≦ D1, and D1, B2> 0.

7. The impeller assembly of claim 2, wherein the impeller disc is provided with a through hole along an axial direction of the impeller body, the through hole being used for being matched with an output shaft of a motor of the multi-wing centrifugal fan.

8. The impeller assembly of claim 1, wherein the number of the at least two vanes is N1, the number of the at least two inner vanes is N2, 2 ≦ N2<0.5 × N1, N1 ≧ 6.

9. A multi-blade centrifugal fan, comprising:

a volute;

a motor;

the impeller assembly of any one of claims 1 to 8 mounted within the volute, the motor being connected to the impeller body and adapted to drive the impeller assembly in rotation.

10. A household appliance comprising a multi-wing centrifugal fan according to claim 9.

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