阅读说明：本技术 一种通风换气装置 (Ventilation device ) 是由 程俊 于 2020-07-07 设计创作，主要内容包括：本发明公开了一种通风换气装置,其包括斜流风机,所述斜流风机包括多个叶片(1)、外壳(2)、导流部(3),其特征在于：叶片的外缘包括第一外缘段(14)、第二外缘段(15),且都为弧形段,第一外缘段、第二外缘段的弧形弯曲方向相反；所述导流部包括第一导流段(4)、第二导流段(5)、第三导流段(6)、导流尾段(7),且它们都为弧形段,第二导流段与第一外缘段大体上平行设置,第三导流段与第二外缘段大体上平行设置。其能够减小叶片进口紊流,减小斜流叶轮压力损失,降低噪音。(The invention discloses a ventilation device, which comprises an oblique flow fan, wherein the oblique flow fan comprises a plurality of blades (1), a shell (2) and a flow guide part (3), and is characterized in that: the outer edge of the blade comprises a first outer edge section (14) and a second outer edge section (15), which are arc-shaped sections, and the arc-shaped bending directions of the first outer edge section and the second outer edge section are opposite; the flow guide part comprises a first flow guide section (4), a second flow guide section (5), a third flow guide section (6) and a flow guide tail section (7), the first flow guide section, the second flow guide section and the first outer edge section are arranged in parallel, and the third flow guide section and the second outer edge section are arranged in parallel. The impeller can reduce the turbulence at the inlet of the blade, reduce the pressure loss of the oblique flow impeller and reduce the noise.)

1. The utility model provides a ventilation and air exchange device, its includes the diagonal flow fan, the diagonal flow fan includes a plurality of blades (1), shell (2), water conservancy diversion portion (3), and the shell is located the radial periphery of blade, and the internal perisporium of shell is provided with water conservancy diversion portion, and the blade has leading edge (11), trailing edge (12), outer fringe (13), its characterized in that: the outer edge comprises a first outer edge section (14) and a second outer edge section (15), the first outer edge section and the second outer edge section are sequentially connected and are arc-shaped sections, and the arc-shaped bending directions of the first outer edge section and the second outer edge section are opposite; the flow guide part comprises a first flow guide section (4), a second flow guide section (5), a third flow guide section (6) and a flow guide tail section (7), the first flow guide section, the second flow guide section, the third flow guide section and the flow guide tail section are sequentially connected and are arc-shaped sections, the second flow guide section is arranged in a manner of being substantially parallel to the first outer edge section, and the third flow guide section is arranged in a manner of being substantially parallel to the second outer edge section.

2. A ventilation device as claimed in claim 1, wherein said first flow guide section is connected to an upstream side of said second flow guide section, and an arc-shaped convex portion of said flow guide tail section is provided toward an outer side of a recirculation chamber formed between said flow guide portion and said housing, and an arc-shaped convex portion of said second flow guide section is provided toward said blades, and an arc-shaped convex portion of said third flow guide section is provided toward said housing.

3. A ventilation device as claimed in claim 2, wherein the arcuate convex portion of the first outer edge section is disposed toward the radially inner side of the vane, and the arcuate convex portion of the second outer edge section is disposed toward the flow guide portion.

4. A ventilation device as claimed in claim 2 or 3, characterized in that the arc-shaped convex point of the first flow guiding section is arranged towards the radial inner side of the blade, and a first flow return hole (8) is arranged on the first flow guiding section, one end of the first flow return hole is communicated with the flow return cavity, and the other end of the first flow return hole is communicated with the front edge and/or the outer edge of the blade; and a second backflow hole (9) is formed in the flow guide tail section, one end of the second backflow hole is communicated with the backflow cavity, and the other end of the second backflow hole is communicated with the rear edge of the blade and/or the outlet end of the blade.

5. A ventilation device as claimed in claim 2 or 3, wherein a fourth flow guiding section (10) is provided outside the first flow guiding section, the fourth flow guiding section is an arc-shaped section, the fourth flow guiding section is integrally or separately connected and formed with the first flow guiding section, the arc-shaped bending direction of the fourth flow guiding section is the same as that of the first flow guiding section, an inlet return channel is formed between the fourth flow guiding section and the first flow guiding section, the inlet return channel is adjacently communicated with the first return hole, and one end of the fourth flow guiding section, which is not connected with the first flow guiding section, extends to the vicinity of the connection between the leading edge and the outer edge of the vane.

6. A ventilation device as claimed in claim 2 or 3, wherein a resonance section (16) and an arc section (17) are provided in the return chamber, the resonance section and the arc section are connected in sequence, the resonance section is a horizontal section, one end of the resonance section is connected with the third flow guiding section, and the other end is a free end.

7. A ventilation device according to claim 6, characterized in that the resonance chamber is formed by the resonance section, the arc-shaped section and the flow guiding part, the resonance chamber is communicated with the return chamber, the second flow guiding section is provided with one or more communication holes (18), the communication holes are communicated with the resonance chamber, and the air flow can enter the resonance chamber from the outer side of the second flow guiding section.

Technical Field

The invention relates to the technical field of ventilation (fans), in particular to a ventilation device, and specifically relates to an oblique flow fan.

Background

The diagonal flow fan as a ventilation device is widely applied to various fields of production and life, and has great market demand. However, the existing diagonal flow fan has the problems of inlet turbulent flow, large pressure loss and large noise.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the interstage return guide vane of the compressor, the turbulent flow at the inlet of the blade can be reduced and the pressure loss of the diagonal flow impeller can be reduced through the structural design of the flow guide part and the outer edge of the blade; through the structural design of the resonant cavity, the noise can be effectively reduced.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a ventilation and air exchange device, its includes the diagonal flow fan, the diagonal flow fan includes a plurality of blades (1), shell (2), water conservancy diversion portion (3), and the shell is located the radial periphery of blade, and the internal perisporium of shell is provided with water conservancy diversion portion, and the blade has leading edge (11), trailing edge (12), outer fringe (13), its characterized in that: the outer edge comprises a first outer edge section (14) and a second outer edge section (15), the first outer edge section and the second outer edge section are sequentially connected and are arc-shaped sections, and the arc-shaped bending directions of the first outer edge section and the second outer edge section are opposite; the flow guide part comprises a first flow guide section (4), a second flow guide section (5), a third flow guide section (6) and a flow guide tail section (7), the first flow guide section, the second flow guide section, the third flow guide section and the flow guide tail section are sequentially connected and are arc-shaped sections, the second flow guide section is arranged in a manner of being substantially parallel to the first outer edge section, and the third flow guide section is arranged in a manner of being substantially parallel to the second outer edge section.

Further, first water conservancy diversion section is connected in the upper reaches side of second water conservancy diversion section, and the arc bump portion of water conservancy diversion tail section sets up towards the outside of the backward flow chamber that constitutes between water conservancy diversion portion and the shell, and the arc bump portion of second water conservancy diversion section sets up towards the blade, and the arc bump portion of third water conservancy diversion section sets up towards the shell.

Further, the arc salient point part of the first outer edge section is arranged towards the radial inner side of the blade, and the arc salient point part of the second outer edge section is arranged towards the flow guide part.

Furthermore, the arc-shaped salient point part of the first flow guide section is arranged towards the radial inner side of the blade, a first backflow hole (8) is formed in the first flow guide section, one end of the first backflow hole is communicated with the backflow cavity, and the other end of the first backflow hole is communicated with the front edge and/or the outer edge of the blade; and a second backflow hole (9) is formed in the flow guide tail section, one end of the second backflow hole is communicated with the backflow cavity, and the other end of the second backflow hole is communicated with the rear edge of the blade and/or the outlet end of the blade.

Furthermore, a fourth flow guide section (10) is arranged on the outer side of the first flow guide section, the fourth flow guide section is an arc-shaped section, the fourth flow guide section and the first flow guide section are integrally or separately connected and formed, the arc bending direction of the fourth flow guide section is consistent with that of the first flow guide section, an inlet backflow channel is formed between the fourth flow guide section and the first flow guide section, the inlet backflow channel is adjacently communicated with the first backflow hole, and one end, which is not connected with the first flow guide section, of the fourth flow guide section extends to the position near the connection position of the front edge and the outer edge of the blade.

Furthermore, a resonance section (16) and an arc section (17) are arranged in the reflux cavity, the resonance section and the arc section are sequentially connected, the resonance section is a horizontal section, one end of the resonance section is connected with the third flow guide section, and the other end of the resonance section is a free end.

Furthermore, a resonant cavity is formed among the resonant section, the arc-shaped section and the flow guide part, the resonant cavity is communicated with the reflux cavity, one or more communicating holes (18) are formed in the second flow guide section and are communicated with the resonant cavity, and air flow can enter the resonant cavity from the outer side of the second flow guide section.

According to the ventilation and air exchange device, the turbulence at the inlet of the blade can be reduced and the pressure loss of the oblique flow impeller can be reduced through the structural design of the flow guide part and the outer edge of the blade; through the structural design of the resonant cavity, the noise can be effectively reduced.

Drawings

Fig. 1 is a schematic structural view of an oblique flow fan of the present invention.

In the figure: (oblique flow) blade 1, outer shell/outer cylinder 2, flow guiding part 3, first flow guiding section 4, second flow guiding section 5, third flow guiding section 6, flow guiding tail section 7, first backflow hole 8, second backflow hole 9, fourth flow guiding section 10, front edge 11, rear edge 12, outer edge 13, first outer edge section 14, second outer edge section 15, resonance section 16, arc section 17 and communication hole 18; "→" airflow direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, a ventilation device, it includes the diagonal flow fan, the diagonal flow fan includes a plurality of blades 1, a housing 2, water conservancy diversion portion 3, housing 2 is located the radial periphery of blade 1, the internal perisporium of housing 2 is provided with water conservancy diversion portion 3, blade 1 has leading edge 11, trailing edge 12, outer fringe 13 includes first outer fringe section 14, second outer fringe section 15, first outer fringe section 14, second outer fringe section 15 connect gradually, and all be the arc section, the arc bending direction of first outer fringe section 14, second outer fringe section 15 is opposite, specifically the arc bump portion of first outer fringe section 14 sets up towards the radial inboard of blade 1, the arc bump portion of second outer fringe section 15 sets up towards water conservancy diversion portion 3. The flow guide part 3 comprises a first flow guide section 4, a second flow guide section 5, a third flow guide section 6 and a flow guide tail section 7, the first flow guide section 4, the second flow guide section 5, the third flow guide section 6 and the flow guide tail section 7 are sequentially connected and are arc-shaped sections, the second flow guide section 5 is arranged in a manner of being substantially parallel to the first outer edge section 14, the third flow guide section 6 is arranged in a manner of being substantially parallel to the second outer edge section 15, the first flow guide section 4 is connected to the upstream side of the second flow guide section 5, and the arc-shaped convex point part of the flow guide tail section 7 is arranged towards the outer side of a backflow cavity formed between the flow guide part 3 and the shell 2; the arc bump portion of the second guide section 5 is arranged towards the blade 1, and the arc bump portion of the third guide section 6 is arranged towards the shell 2.

The arc convex point part of the first flow guide section 4 is arranged towards the radial inner side of the blade 1, a first backflow hole/communication port 8 is arranged on the first flow guide section 4, one end of the first backflow hole 8 is communicated with the backflow cavity, and the other end of the first backflow hole is communicated with the front edge 11 and/or the outer edge 13 of the blade 1; and a second backflow hole/communication port 9 is formed in the flow guide tail section 7, one end of the second backflow hole 9 is communicated with the backflow cavity, and the other end of the second backflow hole is communicated with the rear edge 12 of the blade 1 and/or the outlet end of the blade. Through the structural design of the flow guide part and the outer edge of the blade, the turbulence at the inlet of the blade can be reduced, and the pressure loss of the oblique flow impeller is reduced.

Further, a fourth flow guide section 10 is arranged on the outer side of the first flow guide section 4, the fourth flow guide section 10 is an arc-shaped section, the fourth flow guide section 10 and the first flow guide section 4 are integrally formed, the arc-shaped bending direction of the fourth flow guide section 10 and the arc-shaped bending direction of the first flow guide section 4 are consistent, an inlet backflow channel is formed between the fourth flow guide section 10 and the first flow guide section 4, the inlet backflow channel is adjacently communicated with the first backflow hole 8, and one end, which is not connected with the first flow guide section 4, of the fourth flow guide section 10 extends to the position near the connection of the front edge 11 and the outer edge 13 of the blade 1. Through the structural design of the fourth guide flow section, the turbulence at the inlet of the blade can be further reduced, and the pressure loss of the oblique flow impeller is reduced.

Furthermore, a resonance section 16 and an arc section 17 are arranged in the reflux cavity, the resonance section 16 and the arc section 17 are sequentially connected, the resonance section 16 is a horizontal section, one end of the resonance section 16 is connected with the third flow guide section 6, the other end of the resonance section is a free end, a resonant cavity is formed among the resonance section 16, the arc section 17 and the flow guide part 3, and the resonant cavity is communicated with the reflux cavity; one or more communicating holes 18 are formed in the second flow guide section 5, the communicating holes 18 are communicated with the resonant cavity, and air flow can enter the resonant cavity from the outer side of the second flow guide section 5. Through the structural design of the resonant cavity, the noise can be effectively reduced.

According to the ventilation and air exchange device, the turbulence at the inlet of the blade can be reduced and the pressure loss of the oblique flow impeller can be reduced through the structural design of the flow guide part and the outer edge of the blade; through the structural design of the resonant cavity, the noise can be effectively reduced.

The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.