CN218862926U

CN218862926U - Impeller of multi-wing centrifugal fan, multi-wing centrifugal fan and range hood

Info

Publication number: CN218862926U
Application number: CN202222903543.7U
Authority: CN
Inventors: 张鲁涛
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-04-14
Anticipated expiration: 2032-10-28

Abstract

The utility model discloses an impeller of a multi-wing centrifugal fan, which comprises a front disc; the rear disc is arranged opposite to the front disc at intervals; the blades are connected between the front disk and the rear disk and are arranged at intervals along the circumferential direction of the front disk and the rear disk; well dish, the setting is between preceding dish and back dish, includes: the mounting disc is positioned in the center of the area surrounded by the blades, the spokes are sheet-shaped, at least two spokes are radially arranged by taking the mounting disc as the center, the first end of each spoke is connected with the mounting disc, the second end of each spoke is connected with the rear disc or the blades, and a first vent hole is formed between every two adjacent spokes; the method is characterized in that: each spoke is provided with a flow deflector extending along the front-back direction. Through be provided with the water conservancy diversion piece that extends along the fore-and-aft direction on each spoke, guide the air flow to the motor and remove when the air flow around the acceleration motor for more air currents discharge outdoor behind the motor, improve the heat dispersion of motor, and then reduce the motor temperature rise.

Description

Impeller of multi-wing centrifugal fan, multi-wing centrifugal fan and range hood

Technical Field

The utility model belongs to the technical field of the fan, concretely relates to multi-wing centrifugal fan's impeller, multi-wing centrifugal fan and range hood.

Background

The multi-wing centrifugal fan has the outstanding characteristics of compact structure, high pressure coefficient, low noise and large flow coefficient, and is widely applied to the range hood. Typically, such centrifugal fans include a volute, an impeller, and a motor that drives the impeller.

The multi-wing centrifugal fan of the existing range hood mostly adopts impellers with air entering from two sides so as to effectively improve the flow of the range hood. The double-sided inlet impeller typically includes a front disk, a rear disk, a center disk positioned between the front and rear disks, and vanes. The motor is usually installed on the impeller central disk, and the motor provides power to drive the impeller to form a negative pressure region, so that the oil smoke is sucked into the range hood from the outside. The air flow on the two sides of the middle disc is usually unbalanced, the air flow impacts the middle disc to generate vortex, so that the air flow is unstable, meanwhile, different impact forces can also influence the dynamic balance in the running process of the impeller, and the generated large-scale vortex can also generate vortex noise. To solve this problem, 4-8 vent holes are commonly used in current medium trays.

The invention discloses an impeller assembly for a centrifugal fan, which comprises a middle disc, wherein the impeller assembly is provided with an axis, the middle disc is provided with a center, the middle disc comprises a wheel disc installation part positioned in the middle, a connecting part positioned at the periphery of the wheel disc installation part and a blade installation part positioned at the periphery of the connecting part, blade slots are formed in the blade installation part, the wheel disc installation part integrally protrudes along the axis direction relative to the connecting part, a plurality of pressing tables arranged at intervals are arranged on the connecting part along the circumferential direction, the pressing tables protrude along the axis direction and are annular, and vent holes are formed in the pressing tables. The setting in above-mentioned ventilation hole can realize the adaptation degree of different front and back air inlet ratios under the different operating mode, the automatic balance air inlet ratio.

In the running process of the motor, the temperature rise problem inevitably exists, which can cause the performance reduction of the motor and influence the service life of the motor. This problem is also the first problem that has always plagued the skilled person.

At present, a method for solving the motor temperature rise is not well adopted, and a common solution is to solve the motor temperature rise problem by adjusting motor parameters by a motor manufacturer. However, when the temperature rise of the motor sample sent by the motor factory does not reach the standard, the motor sample generally needs to be communicated with the motor factory for many times, and the motor factory is improved for many times, so that the motor meeting the performance requirement can be obtained, and the manpower, material resources and financial resources are consumed; even if the temperature rise of the motor samples sent by a motor factory reaches the standard, the mass production motors still have the possibility that more temperature rises do not reach the standard.

Therefore, the impeller structure needs to be improved, and the motor needs to be cooled.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that an improve motor heat dispersion's multi-wing centrifugal fan's impeller when noise reduction is provided.

The utility model aims to solve the second technical problem that a multi-wing centrifugal fan who uses above-mentioned impeller is provided.

The utility model aims to solve the third technical problem that a smoking lampblack absorber that uses there is above-mentioned multi-wing centrifugal fan is provided.

The utility model provides a technical scheme that first technical problem adopted does: an impeller of a multi-blade centrifugal fan comprises

A front plate;

the rear disc is arranged opposite to the front disc at intervals;

the blades are connected between the front disk and the rear disk and are arranged at intervals along the circumferential direction of the front disk and the rear disk;

well dish, the setting is between preceding dish and back dish, includes:

a mounting disk located centrally of the area encompassed by the blades, an

The spokes are in a sheet shape, at least two spokes are radially arranged by taking the mounting disc as a center, the first end of each spoke is connected with the mounting disc, the second end of each spoke is connected with the rear disc or the blade, and a first ventilation hole is formed between every two adjacent spokes;

the method is characterized in that: each spoke is provided with a flow deflector extending along the front-back direction.

To facilitate rapid guiding of the air flow around the motor, preferably, the baffles are arranged on both side edges of each of the spokes.

In order to facilitate the arrangement of the guide vanes, preferably, the guide vanes are flanges formed by bending the two side edges of each spoke forwards or backwards, so that the guide vanes are equivalent to reinforcing ribs, and the strength of each spoke is improved.

The utility model provides a technical scheme that second technical problem adopted does: the utility model provides a multi-wing centrifugal fan, includes the spiral case and sets up the motor in the spiral case, the motor has the output shaft, its characterized in that: the volute is internally provided with the impeller, the mounting disc is provided with a mounting hole for the output shaft to pass through, and the motor output shaft passes through the mounting disc mounting hole from back to front and is in driving connection with the mounting disc.

In order to further accelerate the airflow flowing in the impeller and guide the airflow backwards, accelerate the airflow flowing around the motor and improve the heat dissipation effect of the motor, the fan further preferably comprises

The locking piece is positioned on the front side of the mounting disc, arranged on the periphery of the motor output shaft and used for connecting the mounting disc with the motor output shaft;

the axial flow blades are at least two and are arranged in a radial mode by taking the locking piece as the center, and second ventilation holes are formed between every two adjacent axial flow blades.

In order to improve the efficiency of guiding the airflow backwards, the length of each axial flow blade is preferably larger than the radius of the mounting disc.

In order to improve the rotation stability of the axial flow blades, fixing rings are arranged on the peripheries of the axial flow blades, and one end, far away from the locking piece, of each axial flow blade is connected with the inner wall of each fixing ring.

The volute is designed into a double air inlet mode, namely air can be fed from front to back, so that air around the motor flows more smoothly.

The utility model provides a technical scheme that third technical problem adopted does: the utility model provides a range hood, includes fan frame, its characterized in that: the multi-wing centrifugal fan is arranged in the fan frame.

The utility model provides a technical scheme that third technical problem adopted does: the utility model provides a range hood, includes the fan frame, this fan frame includes backplate, its characterized in that: the multi-wing centrifugal fan is arranged in the fan frame, a gap for air flow to flow into the second air inlet is formed between the volute casing rear cover plate and the back plate, and the back plate is provided with an air vent corresponding to the second air inlet, so that air around the motor is accelerated to be discharged.

Compared with the prior art, the utility model has the advantages of: the mesodial is including the mounting disc that is used for the motor installation and use the mounting disc to be two piece at least spokes of radial setting as the center, is formed with first ventilation hole between the adjacent spoke, and the air current of balanced mesodial both sides reduces the production of large scale swirl to reduce the noise of impeller. The guide vanes extending in the front-back direction are arranged on each spoke, so that the air flow around the motor is accelerated and is guided to move towards the motor, more air flows are discharged outdoors after passing through the motor, the heat dissipation performance of the motor is improved, and the temperature rise of the motor is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an impeller according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an impeller center disk in an embodiment of the present invention.

Fig. 3 is an enlarged view of the point i in fig. 2.

Fig. 4 is a schematic structural view of a multi-blade centrifugal fan according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of another view angle of the multi-blade centrifugal fan according to the embodiment of the present invention.

Fig. 6 is an exploded view of a multi-blade centrifugal fan according to an embodiment of the present invention.

Fig. 7 is a schematic structural view illustrating an embodiment of the multi-blade centrifugal fan according to the present invention, in which the locking member, the axial flow blade, and the fixing ring are assembled together.

Fig. 8 is a schematic structural view of the range hood according to the embodiment of the present invention.

Fig. 9 is a sectional view of the range hood according to the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Referring to fig. 1 to 3, there is shown an impeller comprising a front disc 1, a rear disc 2, a plurality of blades 3 and a central disc 4. The relative interval of after-disc 2 and preceding dish 1 sets up, and a plurality of blades 3 are connected between preceding dish 1 and after-disc 2, and a plurality of blades 3 set up along preceding dish 1 and after-disc 2 circumference interval.

The central disc 4 is arranged between the front disc 1 and the rear disc 2 and comprises a mounting disc 41 and spokes 42. The mounting disc 41 is located the regional center that blade 3 surrounded, and spoke 4 is the slice, and spoke 4 has 6 to take mounting disc 41 as the radial setting of center, and the first end of every spoke 42 is connected with mounting disc 41, and the second end is connected with blade 3, and is formed with first ventilation hole 421 between the adjacent spoke 42. Each spoke 42 is provided with a guide vane 43 extending along the front-back direction, and the guide vanes 43 are turned-over edges formed by bending the two side edges of each spoke 42 forwards. The mounting plate 41 has a mounting hole 411.

Referring to fig. 4 to 7, the multi-blade centrifugal fan includes a volute 5, and a motor 6, a locker 71, an axial flow blade 72, and a fixing ring 73 disposed in the volute 5.

The volute 5 comprises a front cover plate 51, a rear cover plate 52 and a volute annular wall 53, the front cover plate 51 and the rear cover plate 52 are arranged at intervals, the volute annular wall 53 is connected between the front cover plate 51 and the rear cover plate 52, a first air inlet 511 is formed in the front cover plate 51, and a second air inlet 521 is formed in the rear cover plate 52. The impeller of the present embodiment is provided in the volute 5.

The motor 6 has an output shaft 61, and the motor output shaft 61 passes through the mounting plate mounting hole 411 from the rear to the front and is drivingly connected to the mounting plate 41.

The locking piece 71 is positioned on the front side 41 of the mounting plate and arranged on the periphery of the motor output shaft 61 and used for connecting the mounting plate 41 with the motor output shaft 61; the axial flow blades 72 are 4 and radially arranged with the locking member 71 as the center, and second ventilation holes 721 are provided between the adjacent axial flow blades 72. The length of each axial flow blade 72 is greater than the radius of the mounting disk 41. The fixed ring 73 is arranged on the periphery of the axial flow blades 72, and one end of each axial flow blade 72 far away from the locking piece 71 is connected with the inner wall of the fixed ring 73.

Referring to fig. 8 to 9, the range hood includes a fan frame 8, the fan frame 8 includes a back plate 81, and the multi-blade centrifugal fan of the embodiment is disposed in the fan frame 8. A gap for air to flow into the second air inlet 521 is formed between the volute casing rear cover plate 52 and the back plate 81, and a vent hole 811 is formed at a position of the back plate 81 corresponding to the second air inlet 521.

Claims

1. An impeller of a multi-wing centrifugal fan comprises

A front plate (1);

the rear disc (2) is arranged opposite to the front disc (1) at intervals;

the blades (3) are connected between the front disc (1) and the rear disc (2), and the blades (3) are arranged at intervals along the circumferential direction of the front disc (1) and the rear disc (2);

well dish (4), set up between preceding dish (1) and back dish (2), include:

a mounting disc (41) located centrally in the area enclosed by the blades (3), an

The spokes (42) are sheet-shaped, at least two spokes are radially arranged by taking the mounting disc (41) as a center, the first end of each spoke (42) is connected with the mounting disc (41), the second end of each spoke is connected with the rear disc (2) or the blade (3), and a first ventilation hole (421) is formed between every two adjacent spokes (42);

the method is characterized in that: each spoke (42) is provided with a flow deflector (43) extending in the front-rear direction.

2. The impeller of the multi-blade centrifugal fan according to claim 1, wherein: the guide vanes (43) are arranged on the two side edges of each spoke (42).

3. Impeller for a centrifugal fan with multiple blades according to claim 2, characterized in that: the guide vanes (43) are flanges formed by bending the edges of the two sides of each spoke (42) forwards or backwards.

4. A multiple-wing centrifugal fan comprising a volute (5) and a motor (6) disposed within the volute (5), the motor (6) having an output shaft (61), characterized in that: the impeller of claim 1, 2 or 3 is arranged in the volute (5), the mounting disc (41) is provided with a mounting hole (411) for the output shaft (61) to pass through, and the output shaft (61) passes through the mounting disc mounting hole (411) from back to front and is in driving connection with the mounting disc (41).

5. The multi-wing centrifugal fan of claim 4, wherein: also comprises

A locking member (71) which is positioned at the front side of the mounting plate (41) and arranged at the periphery of the output shaft (61) and is used for connecting the mounting plate (41) with the output shaft (61);

the axial flow blades (72) are at least two and are arranged in a radial shape by taking the locking piece (71) as the center, and a second ventilation hole (721) is arranged between the adjacent axial flow blades (72).

6. The multi-wing centrifugal fan of claim 5, wherein: the length of each axial flow blade (72) is larger than the radius of the mounting disc (41).

7. The multi-wing centrifugal fan of claim 5, wherein: the periphery of the axial flow blades (72) is provided with a fixing ring (73), and one end, far away from the locking piece (71), of each axial flow blade (72) is connected with the inner wall of the fixing ring (73).

8. The multi-wing centrifugal fan of claim 4, wherein: the volute (5) comprises a front cover plate (51), a rear cover plate (52) and a volute annular wall (53), the front cover plate (51) and the rear cover plate (52) are arranged at intervals in a front-rear mode, the volute annular wall (53) is connected between the front cover plate (51) and the rear cover plate (52), a first air inlet (511) is formed in the front cover plate (51), and a second air inlet (521) is formed in the rear cover plate (52).

9. The utility model provides a range hood, includes fan frame (8), its characterized in that: the multi-wing centrifugal fan according to any one of claims 4 to 8 is arranged in the fan frame (8).

10. The utility model provides a range hood, includes fan frame (8), and this fan frame (8) includes backplate (81), its characterized in that: the multi-wing centrifugal fan of claim 8 is arranged in the fan frame (8), a gap for air flow to flow into the second air inlet (521) is formed between the volute casing rear cover plate (52) and the back plate (81), and a vent hole (811) is formed in the position, corresponding to the second air inlet (521), of the back plate (81).