CN211820009U

CN211820009U - Diagonal flow booster fan

Info

Publication number: CN211820009U
Application number: CN202020282730.6U
Authority: CN
Inventors: 卢裕成; 卢生成
Original assignee: Foshan Samyoo Electronic Co Ltd
Current assignee: Foshan Samyoo Electronic Co Ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-10-30
Anticipated expiration: 2030-03-09
Also published as: EP3879113A1; EP3879113C0; EP3879113B1; US20210277914A1; ES2949813T3

Abstract

The utility model discloses an oblique flow booster fan, which comprises an impeller, an air guide component, a motor and a booster volute; the impeller comprises an impeller body and a plurality of blades connected to the impeller body, each blade spirally extends from the top of the impeller body to the bottom of the impeller body, the two ends of each blade form an upper edge and a lower edge respectively, and the width of the upper edge is greater than that of the lower edge; the air guide assembly comprises an outer ring, an inner cylinder arranged in the outer ring at intervals and a plurality of air guide stationary blades uniformly connected between the inner cylinder and the outer cylinder; the motor is arranged on the inner cylinder and the rotating shaft of the motor is connected with the impeller body; the spiral case cover of pressure boost is located outside the impeller and is connected with the outer loop, and the one end that closes on the blade of pressure boost spiral case forms the air intake, and outer loop place end forms the air outlet, the utility model discloses utilize the oblique flow pressure boost principle to promote the wind pressure, further increase the wind pressure through air guide component's water conservancy diversion effect, and the width on the reason on every blade is greater than the width of lower edge, can reduce same frequency resonance, reduces the afterbody vortex mode of lower edge to the noise reduction.

Description

Diagonal flow booster fan

Technical Field

The utility model relates to a fan technical field especially relates to a diagonal flow booster fan suitable for air purifier.

Background

The air purifier is also called as an air cleaner, an air freshener and a purifier, and can adsorb, decompose or convert various air pollutants, mainly remove particulate matters in the air, including allergens, indoor PM2.5 and the like, so as to improve the air cleanliness; meanwhile, the problem of air pollution caused by volatile organic compounds in rooms, underground spaces, vehicles and the like due to decoration or other reasons can be solved.

The power source of the air purifier is a fan, and the running condition of the fan directly influences the performance of the air purifier. The required purifying effect of air purifier is higher, and the windage coefficient of its filter screen is just bigger, and is big more to the required wind pressure of wind wheel fan, and traditional centrifugal wind wheel or axial-flow wind wheel hardly satisfy this kind of high wind pressure requirement, if the fan satisfies the requirement of big amount of wind and high wind pressure, the noise when can lead to air purifier operation is great.

Therefore, there is a need to provide a new fan with high wind pressure and low noise to solve the above problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a diagonal flow booster fan of high wind pressure, low noise.

In order to achieve the above purpose, the technical scheme of the utility model is that: the oblique flow booster fan comprises an impeller, an air guide assembly, a motor and a booster volute; the impeller comprises an impeller body and a plurality of blades connected to the impeller body, each blade spirally extends from the top of the impeller body to the bottom of the impeller body, two ends of each blade respectively form an upper edge and a lower edge, and the width of the upper edge is greater than that of the lower edge; the air guide assembly comprises an outer ring, an inner cylinder arranged in the outer ring at intervals and a plurality of air guide stationary blades uniformly connected between the inner cylinder and the outer cylinder; the motor is arranged on the inner cylinder and the rotating shaft of the motor is connected with the impeller body; the booster volute casing is arranged outside the impeller and connected with the outer ring, an air inlet is formed at one end, close to the upper edges of the blades, of the booster volute casing, and an air outlet is formed at the end where the outer ring is located.

Preferably, the upper edge is formed by extending the impeller body upwards and is in a spiral shape.

Preferably, the impeller has an odd number of said blades.

Preferably, the diagonal flow booster fan further includes a connecting seat fixed to the top of the inner cylinder, and the rotating shaft of the motor penetrates through the connecting seat and is connected to the impeller body.

Preferably, a fixing seat for installing the motor is arranged in the inner cylinder.

Preferably, the inner cylinder is frustum-shaped, and an outer diameter of a top portion of the inner cylinder is larger than an outer diameter of a bottom portion of the inner cylinder, the inner cylinder is higher than the outer ring in the axial direction of the rotating shaft, and each of the air guide stationary blades is higher than the outer ring in the axial direction of the rotating shaft.

Preferably, each of the air guide stationary blades has a top edge and a bottom edge which are oppositely arranged, the top edge is connected to the top of the inner cylinder and located above the outer ring, the bottom edge is respectively connected to the inner cylinder and the outer ring, and the top edge and the bottom edge are bent towards each other in the axial direction of the rotating shaft so that the air guide stationary blade is in an arc-shaped structure.

Preferably, a position of the pressure boost volute, which is close to the air inlet, is recessed inwards to form a neck, and an inner wall of the neck is spaced from the vane.

Preferably, a clamping protrusion and a clamping groove which are matched with each other are arranged between the outer ring and the bottom edge of the pressurizing volute, and the clamping protrusion protrudes along the radial direction of the outer ring.

Preferably, the pressure-increasing volute comprises a first shell and a second shell which are matched with each other, a first fixing portion, a second fixing portion, a buckle and a buckling block which are matched with each other are arranged between the first shell and the second shell, the buckle and the buckling block are detachably clamped with each other, and the first fixing portion and the second fixing portion can be detachably connected through a connecting piece.

Compared with the prior art, because the utility model discloses a diagonal flow booster fan, every blade on its impeller is extended to its bottom spiral by the top of impeller body, adds the wind-guiding subassembly in the below of impeller simultaneously, and this wind-guiding subassembly includes the outer loop, locates the inner tube in the outer loop with interval and is radially connected in a plurality of wind-guiding stationary blades between the two, the utility model discloses utilize diagonal flow boosting principle to promote the wind pressure, and further increase the wind pressure through the water conservancy diversion effect of wind-guiding subassembly; meanwhile, the two ends of each blade are respectively provided with an upper edge and a lower edge, and the width of the upper edge is larger than that of the lower edge, so that the same frequency resonance can be reduced, the tail turbulence mode of the lower edge is reduced, and the noise is controlled. Therefore, the utility model discloses a diagonal flow booster fan has the characteristics of high wind pressure, low noise, when it is applied to air purifier, has promoted air purifier's clean air volume (CADR value).

Drawings

Fig. 1 is a schematic structural view of the diagonal flow booster fan of the present invention.

Fig. 2 is a schematic view of the structure of fig. 1 from another angle.

Fig. 3 is a schematic structural view of fig. 1 with the first housing removed.

Fig. 4 is a cross-sectional view of fig. 1.

Fig. 5 is a schematic view of the structure of the impeller of fig. 3.

Fig. 6 is a top view of fig. 5.

Fig. 7 is a front view of fig. 5.

Fig. 8 is an exploded view of the wind guide assembly, the motor and the connecting base in fig. 3.

Fig. 9 is a schematic structural view of the wind guide assembly in fig. 8 at another angle.

Fig. 10 is an exploded view of the booster housing of fig. 1.

Detailed Description

Embodiments of the present invention will now be described with reference to the drawings, wherein like element numerals represent like elements throughout. The utility model provides a diagonal flow booster fan 100 mainly is applicable to air purifier, nevertheless does not use this as the limit, can also be used to other equipment.

Referring to fig. 1 to 4, the present invention provides an oblique flow blower 100, which includes an impeller 110, a wind guide assembly 120, a connecting seat 130, a motor 140, and a pressurizing volute 150. The connecting seat 130 is mounted on the air guide assembly 120, the impeller 110 is mounted on the connecting seat 130, the motor 140 is mounted between the air guide assembly 120 and the connecting seat 130, the rotating shaft 141 of the motor protrudes out of the connecting seat 130 and is connected to the impeller 110, the motor 140 is used for driving the impeller 110 to rotate, the pressure-increasing volute 150 is covered outside the impeller 110 and is connected to the air guide assembly 120, an air inlet 150a is formed at one end of the pressure-increasing volute 150, which is close to the impeller 110, and an air outlet 150b is formed at one end of the pressure-increasing volute.

As shown in fig. 3 to 7, the impeller 110 includes an impeller body 111 and a plurality of blades 112 connected to the impeller body 111, each blade 112 extends spirally from the top of the impeller body 111 to the bottom thereof, and a flow passage 113 is formed between two adjacent blades 112. In addition, one end of each blade 112 at the top of the impeller body 111 forms an upper edge 1121, one end of each blade 112 at the bottom of the impeller body 111 forms a lower edge 1122, and the upper edge 1121 extends upward from the connection start point with the impeller body 111 and forms a spiral shape, so that when the impeller 110 rotates, the blades 112 can rotate to insert air obliquely, and the air suction capacity is increased.

Referring to fig. 5-7, in the present invention, the distance from the connection starting point of the upper edge 1121 and the impeller body 111 to the end point far away from the impeller body 111 is the width of the upper edge 1121, correspondingly, the distance from the connection starting point of the lower edge 1122 and the impeller body 111 to the end point far away from the impeller body 111 is the width of the lower edge 1122, and the width of the upper edge 1121 is greater than the width of the lower edge 1122, so that the co-frequency resonance can be reduced, the turbulence mode at the tail of the lower edge 1122 can be reduced, and the noise can be controlled.

Preferably, the utility model provides an be equipped with odd number blade 112 on impeller body 111, in a specific embodiment, be equipped with nine blades 112 to combine the oblique flow pressure boost principle, can effectively promote the wind pressure. Of course, the number of blades 112 may be flexibly set as desired.

As shown in fig. 4 and fig. 8 to 9, the air guide assembly 120 includes an outer ring 121, an inner cylinder 122, and a plurality of air guide stationary blades 123, where the outer ring 121 is circular, the inner cylinder 122 is frustum-shaped, and an outer diameter of a top of the inner cylinder 122 is greater than an outer diameter of a bottom of the inner cylinder 122, that is, an outer diameter of the inner cylinder 122 gradually decreases from top to bottom, and a structure with a large outer diameter is beneficial to guiding and pressurizing an air flow; meanwhile, the inner cylinder 122 is higher than the outer ring 121 in the axial direction of the rotating shaft 141 of the motor 140, each air guide stationary blade 123 is uniformly connected between the outer ring 121 and the inner cylinder 122, that is, each air guide stationary blade 123 is uniformly arranged along the radial direction of the outer ring 121, each air guide stationary blade 123 is respectively connected to the upper section of the inner cylinder 122 and the top of the outer ring 121, that is, most of each air guide stationary blade 123 is located above the outer ring 121 in the axial direction of the rotating shaft 141 (see fig. 8), and a channel formed between two adjacent air guide stationary blades 123 has a supercharging effect on airflow, so that the wind pressure of the diagonal flow supercharging fan 100 is increased.

As further shown in fig. 8 to 9, each of the air guide vanes 123 has a top edge 1231 and a bottom edge 1232 which are opposite to each other, the top edge 1231 is connected to the inner cylinder 122 and located above the outer ring 121, the bottom edge 1232 is connected to the tops of the inner cylinder 122 and the outer ring 121, respectively, and in the axial direction of the rotating shaft 141, the top edge 1231 and the bottom edge 1232 are curved toward each other to make the air guide vanes 123 have an arc-shaped structure, that is, the top edge 1231 and the bottom edge 1232 are deviated from the vertical direction and curved toward each other.

Referring to fig. 3-4 and 8 again, the outer diameter of the top of the inner cylinder 122 corresponds to the outer diameter of the connection base 130, and a fixing base 1221 for being mounted on the motor 140 and a protruding column 1222 for being connected with the connection base 130 are disposed in the inner cylinder 122; a fixing hole 131 is formed in the connecting seat 130 at a position corresponding to the protruding column 1222, and a through hole 132 is formed in the middle of the connecting seat; when the impeller is installed, the motor 140 is installed in the fixing seat 1221, and the rotating shaft 141 thereof extends out of the upper portion of the connecting seat 130 through the through hole 132 of the connecting seat 130 to connect the impeller body 111, and then the connecting seat 130 is clamped at the top of the inner cylinder 122, and a connecting member (e.g., a bolt) passes through the fixing hole 131 of the connecting seat 130 and is screwed on the protruding column 1222, so that the connecting seat 130 and the inner cylinder 122 are fixed.

Referring to fig. 1-4 and 10 again, the pressure boosting volute 150 is covered outside the impeller 110 and connected to the outer ring 121, an air inlet 150a is formed at one end of the pressure boosting volute 150 adjacent to the impeller 110, and an air outlet 150b is formed at the end of the outer ring 121. And, a position of the booster scroll 150 adjacent to the air inlet 150a is recessed inward to form a neck portion 150c, and a gap is formed between an inner wall of the neck portion 150c and the vane 112.

More specifically, the volute casing 150 includes a first casing 151 and a second casing 152 that are matched with each other, the first casing 151 is provided with a first fixing portion 1511 and a buckle 1512, the second casing 152 is provided with a second fixing portion 1521 corresponding to the first fixing portion 1511 and a buckling block 1522 matched with the buckle 1512, when the first casing 151 and the second casing 152 are connected, the buckle 1512 and the buckling block 1522 are detachably buckled with each other, and the first fixing portion 1511 and the second fixing portion 1521 can be fixed by a connecting member (e.g., a bolt).

Referring to fig. 9-10 again, the edge of the outer ring 121 has a locking protrusion 1211 (see fig. 9) protruding along the radial direction, and the first casing 151 or the second casing 152 is correspondingly provided with a locking block, in this embodiment, the bottom of the first casing 151 is convexly provided with a locking block 1513, and the locking block 1513 is provided with a locking slot corresponding to the locking protrusion 1211, so that the locking of the first casing 151 and the outer ring 121 is realized by the matching of the locking protrusion 1211 and the locking slot on the locking block 1513. Of course, a matching locking protrusion and a locking block may also be provided between the second housing 152 and the outer ring 121.

Referring to fig. 1-10 again, when the diagonal flow blower 100 of the present invention works, the motor 140 drives the impeller 110 to rotate, so that the airflow enters the inside of the blower housing 150 from the air inlet 150a and flows in the flow channel 113 along the direction indicated by the arrow in fig. 4, and the wind pressure can be effectively increased by the diagonal flow pressurization principle and the guiding action of the wind guide assembly 120; meanwhile, the width of the upper edge 1121 of the blade 112 is greater than the width of the lower edge 1122 thereof, so that the same-frequency resonance can be reduced, the turbulence mode at the tail of the lower edge 1122 is reduced, and the noise is controlled.

In summary, because the present invention discloses a diagonal flow supercharging fan 100, each blade 112 of its impeller 110 is extended from the top of the impeller body 111 to the bottom thereof, and at the same time, the air guiding assembly 120 is added below the impeller 110, and the air guiding assembly 120 includes an outer ring 121, an inner tube 122 disposed at an interval in the outer ring 121, and a plurality of air guiding stationary blades 123 uniformly connected therebetween, the present invention utilizes the diagonal flow supercharging principle to lift the wind pressure, and further increases the wind pressure through the guiding effect of the air guiding assembly 120; meanwhile, an upper edge 1121 and a lower edge 1122 are respectively formed at two ends of each blade 112, and the width of the upper edge 1121 is greater than that of the lower edge 1122, so that co-frequency resonance can be reduced, a tail turbulence mode of the lower edge 1122 is reduced, and noise is controlled. Therefore, the utility model discloses an oblique flow booster fan 100 has the characteristics of high wind pressure, low noise, when it is applied to air purifier, has promoted air purifier's clean air volume (CADR value).

The other structures of the air purifier according to the present invention may be conventional designs well known to those skilled in the art, and will not be described in detail herein.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.

Claims

1. An oblique-flow booster fan, comprising:

the impeller comprises an impeller body and a plurality of blades connected to the impeller body, each blade spirally extends from the top of the impeller body to the bottom of the impeller body, two ends of each blade respectively form an upper edge and a lower edge, and the width of the upper edge is larger than that of the lower edge;

the air guide assembly comprises an outer ring, an inner cylinder arranged in the outer ring at intervals and a plurality of air guide stationary blades uniformly connected between the inner cylinder and the outer cylinder;

the motor is arranged on the inner cylinder, and the rotating shaft of the motor is connected with the impeller body;

and the supercharging volute is covered outside the impeller and is connected with the outer ring, an air inlet is formed at one end of the supercharging volute close to the upper edge of the blade, and an air outlet is formed at the end where the outer ring is located.

2. The diagonal flow booster fan of claim 1 wherein the upper edge is formed by the impeller body extending upwardly and is helical.

3. The diagonal flow booster fan of claim 1 or 2, wherein the impeller has an odd number of the blades.

4. The diagonal flow booster fan of claim 1, further comprising a connecting base fixed to a top of the inner barrel, wherein a rotating shaft of the motor penetrates through the connecting base and is connected to the impeller body.

5. The diagonal flow booster fan of claim 1, wherein a mounting seat is provided in the inner barrel for mounting the motor.

6. The diagonal flow booster fan as claimed in claim 1, wherein the inner tube has a frustum shape, and an outer diameter of a top portion of the inner tube is larger than an outer diameter of a bottom portion thereof, the inner tube is higher than the outer ring in an axial direction of the shaft, and each of the air guide vanes is higher than the outer ring in the axial direction of the shaft.

7. The diagonal flow booster fan as claimed in claim 1, wherein each of the guide vanes has a top edge and a bottom edge which are oppositely disposed, the top edge is connected to a top portion of the inner tube and located above the outer ring, the bottom edge is connected to the inner tube and the outer ring, respectively, and the top edge and the bottom edge are bent toward each other in the axial direction of the rotating shaft to form an arc-shaped structure.

8. The diagonal flow booster fan of claim 1, wherein the booster volute is recessed adjacent the inlet opening to form a neck, an inner wall of the neck being spaced from the vanes.

9. The diagonal flow booster fan of claim 1, wherein a locking protrusion and a locking groove are provided between the outer ring and the bottom edge of the booster volute, and the locking protrusion protrudes in the radial direction of the outer ring.

10. The diagonal flow blower according to claim 1, wherein the blower housing includes a first housing and a second housing that are coupled to each other, and a first fixing portion, a second fixing portion, and a buckle and a buckling block that are coupled to each other are disposed between the first housing and the second housing, respectively, the buckle and the buckling block are detachably engaged with each other, and the first fixing portion and the second fixing portion are detachably connected by a connector.