CN216011136U

CN216011136U - Low-noise fresh air handling unit

Info

Publication number: CN216011136U
Application number: CN202122228928.3U
Authority: CN
Inventors: 张勇; 曾凡张; 邓孟峰
Original assignee: Foshan Beiaole Electric Appliance Co ltd
Current assignee: Foshan Beiaole Electric Appliance Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-03-11
Anticipated expiration: 2031-09-14

Abstract

The utility model provides a low noise fresh air handling unit in the technical field of updraft ventilator, including bottom plate and spiral case, the bottom of spiral case is connected with the bottom plate and is formed and hold the chamber, hold the intracavity and be provided with the wind wheel device, the middle part of bottom plate and spiral case all is provided with and sets up first opening, form the second opening between the exit end of spiral case and the bottom plate, the upper surface and the lower surface of mounting panel all are provided with a plurality of wind wheel blades that encircle along mounting panel circumference, a plurality of wind wheel blades all are the arc slice and the direction of installation slope is unanimous, the afterbody of wind wheel blade all inclines down towards the transmission shaft direction, the afterbody of wind wheel blade is the cockscomb structure; the tail part of the fan rotating blade is in a sawtooth shape, so that the laminar flow boundary layer separation at the tail part of the rotating blade can be inhibited, the separation vortex strength is reduced, the purpose of noise reduction of the fan is achieved, the sawtooth tail part can also change vortex falling with concentrated frequency into discrete vortex falling, the generation of pure sound is avoided, and the purpose of noise reduction is achieved.

Description

Low-noise fresh air handling unit

Technical Field

The utility model relates to an updraft ventilator technical field particularly, relates to a low noise fresh air handling unit.

Background

The air draft device belongs to impeller machinery, is widely applied to various fields of energy, environment, aviation and the like, and is one of main energy consumption devices in industrial and agricultural production. The ventilator is one of four parts in a dedusting ventilation system, is a relatively precise running machine, and can suck external air into the ventilator by means of negative pressure formed in the blower by means of rotation of the impeller and discharge the external air out of the ventilator through the impeller flow channel and the volute.

However, when the fan rotates, the airflow pressure and airflow speed along the circumferential direction at the outlet of the blade channel on the rotating impeller are greatly changed, periodic pressure and speed pulsation occurs, and noise with large decibel is generated by the pulsation.

SUMMERY OF THE UTILITY MODEL

In order to overcome the deficiency of the prior art, a low noise fresh air handling unit is provided, the utility model discloses a concrete technical scheme as follows:

a low-noise fresh air handling unit comprises a bottom plate and a volute, wherein the bottom of the volute is connected with the bottom plate to form a containing cavity, a wind wheel device is arranged in the containing cavity, a first opening is arranged in the middle of the bottom plate and the volute, a second opening is formed between the outlet end of the volute and the bottom plate, the wind wheel device comprises a wind wheel blade and a power device, the power output end of the power device is provided with a transmission shaft, the transmission shaft is connected with the wind wheel blade, the wind wheel blade comprises a mounting plate, the middle of the mounting plate is connected with the transmission shaft, the upper surface and the lower surface of the mounting plate are respectively provided with a plurality of wind wheel blades circumferentially surrounding the mounting plate, the wind wheel blades are all in an arc-shaped sheet shape and have the same installation inclination direction, and the tail parts of the wind wheel blades are inclined downwards towards the direction of the transmission shaft, the tail part of the wind wheel blade is in a sawtooth shape.

Preferably, a reinforcing ring is wound among a plurality of the wind turbine blades.

Preferably, a third through hole is formed in the middle of the mounting plate, a connecting plate is arranged on the power device, the connecting plate is connected with the mounting plate through a plurality of connecting blocks, and a concave structure is formed among the mounting plate, the connecting blocks and the connecting plate.

Preferably, a plurality of mounting holes are formed in the bottom plate, positioning columns which correspond to the mounting holes are arranged on the volute, and positioning holes are formed in the positioning columns.

Preferably, the power device is provided with a protective shell and a binding post, the binding post is provided with a through cavity, and the through cavity is communicated with the inner cavity of the protective shell.

Preferably, the transmission shaft and the connecting plate are locked through a mounting block and a nut.

Preferably, the mounting plate, the plurality of connecting blocks and the connecting plate are of an integrated structure.

Preferably, the surface of the volute is provided with a plurality of reinforcing ribs, and the plurality of reinforcing ribs are of a net structure.

The utility model discloses the beneficial technological effect who gains includes:

the bottom plate and the volute are separated by an operator, the wind wheel blade and the power device are installed in the volute, the power output end of the power device is connected with the transmission shaft and is connected with the wind wheel blade, the power device is preferably a driving motor, the outer wall of the power device is connected with the bottom plate, the bottom plate is further connected with the volute, the power device is started, the power device drives the wind wheel blade to rotate to generate centrifugal suction, airflow enters from the first through hole and is discharged from the second through hole, the airflow scouring effect of the wind wheel blade in an arc-shaped sheet shape is good, the performance of the fan is improved, and the tail part of the fan rotating blade is in a sawtooth shape, laminar boundary layer separation at the tail part of the rotating blade can be inhibited, separation vortex strength is reduced, the purpose of noise reduction of the fan is achieved, and the sawtooth tail part can also change vortex with concentrated frequency into discrete vortex shedding, therefore, the generation of pure tone is avoided, and the purpose of reducing noise is achieved.

Drawings

The invention will be further understood from the following description taken in conjunction with the accompanying drawings; the components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments; like reference numerals designate corresponding parts throughout the different views;

fig. 1 is a schematic overall cross-sectional view of a first perspective of the present invention;

fig. 2 is a schematic structural view of an integral second viewing angle device of the present invention;

FIG. 3 is a schematic view of the structure of the removal volute of the present invention;

FIG. 4 is a schematic structural view of the removal volute and the bottom plate of the present invention;

in the figure: 1. a base plate; 2. a volute; 3. an accommodating chamber; 4. a wind wheel device; 5. a first port; 6. A second port; 8. a power plant; 9. a drive shaft; 10. the blades of the wind wheel; 11. mounting a plate; 12. A wind turbine blade; 13. a reinforcement ring; 14. a third port; 15. a connecting plate; 16. connecting blocks; 17. Mounting holes; 18. a positioning column; 19. positioning holes; 20. a protective shell; 21. a binding post; 22. a cavity is communicated; 23. mounting blocks; 24. a nut; 25. and (5) reinforcing ribs.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention will be further described in detail with reference to the following embodiments thereof; it should be understood that the specific embodiments described herein are for the purpose of illustration only and are not intended to limit the invention; other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description; it is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims; additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description below;

the same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplified description, but it is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations on the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations;

a low-noise fresh air handling unit comprises a bottom plate 1 and a volute 2, wherein the bottom of the volute 2 is connected with the bottom plate 1 to form a containing cavity 3, a wind wheel device 4 is arranged in the containing cavity 3, the middle parts of the bottom plate 1 and the volute 2 are respectively provided with a first through hole 5, an outlet end of the volute 2 is connected with a second through hole 6 formed between the bottom plate 1, the wind wheel device 4 comprises a wind wheel blade 10 and a power device 8, a power output end of the power device 8 is provided with a transmission shaft 9, the transmission shaft 9 is connected with the wind wheel blade 10, the wind wheel blade 10 comprises a mounting plate 11, the middle part of the mounting plate 11 is connected with the transmission shaft 9, the upper surface and the lower surface of the mounting plate 11 are respectively provided with a plurality of wind wheel blades 12 circumferentially surrounding the mounting plate 11, and the wind wheel blades 12 are all in arc-shaped sheets and are installed in an inclined direction, the tail parts of the wind wheel blades 12 are inclined downwards towards the transmission shaft 9, and the tail parts of the wind wheel blades 12 are in a sawtooth shape.

Specifically, as shown in fig. 1 to 4, an operator separates a bottom plate 1 from a volute 2, and then installs a wind turbine blade 10 and a power device 8 in the volute 2, a power output end of the power device 8 is connected with a transmission shaft 9 and is connected with the wind turbine blade 10, the power device 8 is preferably a driving motor, an outer wall of the power device 8 is connected with the bottom plate 1, and then the bottom plate 1 is connected with the volute 2, the power device 8 is started, the power device 8 drives the wind turbine blade 10 to rotate to generate centrifugal suction, airflow enters from a first port 5 and is discharged from a second port 6, the wind turbine blade 12 in an arc-shaped sheet shape has a good airflow scouring effect, the performance of the fan is improved, and the tail part of the fan rotating blade is serrated, so that laminar boundary layer separation at the tail part of the rotating blade can be inhibited, and separation vortex strength is reduced, with this purpose of making an uproar is fallen in the realization fan, the sawtooth afterbody can also drop the vortex that the frequency is more concentrated and become discrete vortex and drop, has avoided the production of pure tone from this to realize the purpose of noise reduction.

Furthermore, a reinforcing ring 13 is arranged among the plurality of wind wheel blades 12 in a winding manner, so that the plurality of wind wheel blades 12 are firmer and more stable in structure, and the single wind wheel blade 12 is not easy to shake in the working process.

Further, the middle part of mounting panel 11 is seted up and is put third opening 14, be provided with connecting plate 15 on the power device 8, connecting plate 15 with connect through a plurality of connecting blocks 16 between the mounting panel 11, form "concave" type structure between mounting panel 11, a plurality of connecting blocks 16 and the connecting plate 15, the space that concave "type structure formed is favorable to power device 8's installation and arrangement, has the clearance simultaneously between a plurality of connecting blocks 16, is favorable to the air current to flow to the lower surface from the upper surface of mounting panel 11, increases centrifugal suction.

Furthermore, a plurality of mounting holes 17 are formed in the bottom plate 1, positioning columns 18 corresponding to the mounting holes 17 are arranged on the volute 2, positioning holes 19 are formed in the positioning columns 18, when the spiral-lock type spiral case is used, an operator can penetrate the mounting holes 17 to lock the screws in the positioning holes 19 of the positioning columns 18, and the locking process is simple, convenient and attractive.

Further, last protective housing 20 and the terminal 21 of being provided with of power device 8, terminal 21 is seted up and is put logical chamber 22, lead to the chamber 22 with the inner chamber UNICOM of protective housing 20 can prevent through protective housing 20 that the device from reducing moisture or dust in the operation process and entering into power device 8's inside, extension device's life, terminal 21 leads to the chamber 22 and makes things convenient for the wire to penetrate power device 8's wiring end simultaneously.

Furthermore, the transmission shaft 9 and the connecting plate 15 are locked by the mounting block 23 and the nut 24, so that the transmission shaft 9 and the connecting plate 15 are locked more firmly.

Furthermore, the mounting plate 11, the connecting blocks 16 and the connecting plate 15 are of an integrated structure, so that the structure is more stable and is not easy to damage.

Furthermore, a plurality of reinforcing ribs 25 are arranged on the surface of the volute 2, and the plurality of reinforcing ribs 25 are of a net structure, so that the overall shell strength of the volute 2 is enhanced.

Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention; that is, the methods, systems, and devices discussed above are examples; various configurations may be omitted, replaced or added with various processes or components as appropriate; for example, in alternative configurations, the methods may be performed in an order different than that described, and/or various components may be added, omitted, and/or combined; moreover, features described with respect to certain configurations may be combined in various other configurations, such as different aspects and elements of a configuration may be combined in a similar manner; furthermore, elements therein may be updated as technology evolves, i.e., many elements are examples and do not limit the scope of the disclosure or claims;

specific details are given in the description to provide a thorough understanding of exemplary configurations including implementations; however, configurations may be practiced without these specific details, e.g., well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations; this description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims; rather, the foregoing description of the configuration will provide those skilled in the art with an enabling description for implementing the described techniques; various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure;

in sum, it is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it defines the spirit and scope of the invention; the above examples are to be understood as merely illustrative of the present invention and not as limiting the scope of the invention; after reading the description of the present invention, the skilled person can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope of the present invention defined by the claims.

Claims

1. The low-noise fresh air handling unit is characterized by comprising a bottom plate (1) and a volute (2), wherein the bottom of the volute (2) is connected with the bottom plate (1) to form a containing cavity (3), a wind wheel device (4) is arranged in the containing cavity (3), the bottom plate (1) and the middle of the volute (2) are provided with a first through opening (5), a second through opening (6) is formed between the outlet end of the volute (2) and the bottom plate (1), the wind wheel device (4) comprises wind wheel blades (10) and a power device (8), the power output end of the power device (8) is provided with a transmission shaft (9), the transmission shaft (9) is connected with the wind wheel blades (10), the wind wheel blades (10) comprise a mounting plate (11), and the middle of the mounting plate (11) is connected with the transmission shaft (9), the upper surface and the lower surface of mounting panel (11) all are provided with a plurality of edges mounting panel (11) circumference wind wheel blade (12) that encircle, a plurality of wind wheel blade (12) all are the arc slice and install the direction of slope unanimously, the afterbody of wind wheel blade (12) all moves towards transmission shaft (9) direction downward sloping, the afterbody of wind wheel blade (12) is the cockscomb structure.

2. The low noise fresh air handling unit according to claim 1, wherein a plurality of said wind turbine blades (12) are wound with a reinforcement ring (13) therebetween.

3. The low-noise fresh air handling unit according to claim 1, wherein a third through opening (14) is formed in the middle of the mounting plate (11), a connecting plate (15) is arranged on the power device (8), the connecting plate (15) is connected with the mounting plate (11) through a plurality of connecting blocks (16), and a concave structure is formed among the mounting plate (11), the connecting blocks (16) and the connecting plate (15).

4. The low-noise fresh air handling unit according to claim 1, wherein a plurality of mounting holes (17) are formed in the bottom plate (1), positioning posts (18) corresponding to the mounting holes (17) are arranged on the volute (2), and positioning holes (19) are formed in the positioning posts (18).

5. The low-noise fresh air handling unit according to claim 1, wherein a protective shell (20) and a binding post (21) are arranged on the power device (8), a through cavity (22) is formed in the binding post (21), and the through cavity (22) is communicated with an inner cavity of the protective shell (20).

6. The fresh air handling unit according to claim 3, wherein the transmission shaft (9) and the connection plate (15) are locked together by a mounting block (23) and a nut (24).

7. The low noise fresh air handling unit according to claim 1, wherein the mounting plate (11), the plurality of connection blocks (16) and the connection plate (15) are of an integral structure.

8. The fresh air handling unit with low noise according to claim 7, wherein a plurality of reinforcing ribs (25) are arranged on the surface of the volute (2), and the plurality of reinforcing ribs (25) are of a net structure.