An air outlet structure for a fan and a fan

Abstract

The utility model belongs to the technical field of industrial fan, provide a air outlet structure and fan for fan, air outlet structure includes: support frame, air outlet body, its inside is provided with gas passage, gas passage includes the air inlet end and air outlet end that intercommunication, connecting piece, its fixed connection between support frame and air outlet body, wherein, air outlet body includes first outer surface and second outer surface, first outer surface and second outer surface smooth transition connection, connecting piece fixed setting in first outer surface end portion close to second outer surface. Compared with prior art, the utility model has through setting up air outlet body with the air inlet end and air outlet end of different flow cross section shape, can realize the smooth transition connection between fan air outlet and silencer air inlet, the first outer surface and second outer surface of air outlet body smooth transition, not only has strengthened structure integral strength, but also is favorable to the smooth flow of airflow, reduces the eddy current and resistance loss.

Description

Technical Field

[0001] This utility model belongs to the field of industrial fan technology, specifically relating to an air outlet structure for a fan and a fan. Background Technology

[0002] In industrial ventilation, air conditioning systems, and various equipment requiring forced airflow, fans serve as core power components and are widely used in metallurgy, chemical industry, power generation, construction, and other fields. When a fan is running, its high-speed rotating impeller draws in air, pressurizes it, and then discharges it from the outlet, creating an airflow with a certain pressure and velocity. To reduce the noise generated during fan operation and its impact on the environment and personnel, silencers are typically connected to the rear end of the fan's outlet to absorb or attenuate airflow noise.

[0003] However, in practical applications, the connection structure between the fan outlet and the silencer inlet often presents numerous problems. Firstly, different manufacturers or models of fans and silencers may have different interface designs. For example, fan outlets are often square-sectioned, while some silencer inlets use a circular design, making direct connection impossible and requiring a transition structure. Traditional connection methods often use simple straight pipes or elbows to change the cross-sectional shape, but these structures often lack sufficient structural strength and stability. Under long-term exposure to airflow impact and equipment vibration, they are prone to deformation or loosening, affecting the system's sealing and reliability.

[0004] Secondly, because the fan generates continuous mechanical vibration during operation, which is transmitted to downstream equipment through the outlet structure, if the connection structure lacks effective support and fixing measures, it will not only exacerbate structural fatigue damage but may also transmit vibration to the silencer, affecting the performance of its internal sound-absorbing materials and even causing resonance, thus increasing noise. In existing technologies, although some outlet connection structures are equipped with supporting components, their connection methods are mostly simple welding or bolt fixing, with unreasonable positioning, difficulty in effectively distributing stress, and inconvenience for installation and maintenance.

[0005] Furthermore, traditional transition connection structures also have shortcomings in airflow guidance. An unreasonable cross-sectional transition design can easily cause airflow turbulence, eddies, and increased local resistance, not only reducing the system's ventilation efficiency and increasing energy consumption, but also potentially generating additional aerodynamic noise due to intensified airflow impact, thus weakening the actual noise reduction effect of the silencer. Therefore, designing an outlet connection structure that can achieve a smooth transition between different cross-sectional shapes while possessing good structural strength and vibration reduction performance has become crucial for improving the overall performance of the fan system.

[0006] In summary, existing connection methods between fan outlets and silencers generally suffer from problems such as interface mismatch, insufficient structural strength, severe vibration transmission, and poor airflow organization. There is an urgent need for a new type of outlet structure that integrates structural stability, reliable connection, and smooth airflow to improve the operating efficiency, safety, and noise reduction performance of fan systems. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide an air outlet structure and a fan for a fan, in light of the current state of the technology.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: An air outlet structure for a fan is proposed, connected between the fan and the silencer, wherein the air outlet structure includes:

[0009] Support frame;

[0010] The air outlet body has an internal gas channel, which includes an air inlet end and an air outlet end that are connected to each other. The air inlet end is fixedly connected to the air outlet of the fan, and the air outlet end is fixedly connected to the air inlet of the silencer. The gas channel is used to guide the airflow discharged by the fan into the silencer. The flow cross-sectional shape of the air outlet end is different from that of the air inlet end.

[0011] A connector is fixedly connected between the support frame and the air outlet body; wherein,

[0012] The air outlet body includes a first outer surface and a second outer surface. One end of the first outer surface is connected to the air inlet end, and one end of the second outer surface is connected to the air outlet end. The first outer surface and the second outer surface are smoothly connected. The connector is fixedly disposed at the end of the first outer surface near the second outer surface.

[0013] In one of the above-mentioned air outlet structures for a fan, the air inlet end and the air outlet end are arranged opposite to each other.

[0014] In the aforementioned air outlet structure for a fan, the air inlet end and the air outlet end have different orientations on the air outlet body.

[0015] In the aforementioned air outlet structure for a fan, the flow cross-section at the air inlet end is square, and the flow cross-section at the air outlet end is circular.

[0016] In the above-mentioned air outlet structure for a fan, the connector includes a connecting plate and a connecting hole disposed on the connecting plate. The shape of the connecting hole matches the end profile of the first outer surface. The air outlet body is fixed in the connecting hole by welding, and the connecting plate is fixed to the support frame by welding.

[0017] In one of the above-mentioned air outlet structures for a fan, a clamp is provided on the outer side wall of the air outlet body. The inner wall of the clamp is tightly fitted with the outer side wall of the air outlet body to assist in the positioning and connection of the air outlet body with the connecting hole and to reinforce the connection between the air outlet body and the fan.

[0018] In the above-mentioned air outlet structure for a fan, the support frame is provided with mounting holes that match the shape of the connecting plate. The sidewall of the mounting hole extends toward its center to form a connecting boss. The connecting boss abuts against the connecting plate and is fixed by welding.

[0019] In the aforementioned air outlet structure for a fan, both the connecting plate and the mounting hole are square structures.

[0020] In one of the above-mentioned air outlet structures for a fan, a flange is welded and fixed to the air outlet end of the air outlet body, and the flange is used for detachable connection with the silencer.

[0021] This utility model solves the above-mentioned technical problems and also proposes a fan, including the above-mentioned air outlet structure for the fan.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) By setting air outlet bodies with inlet and outlet ends having different flow cross-sectional shapes, a smooth transition connection between the fan outlet and the silencer inlet can be achieved, which is especially suitable for equipment with inconsistent interface forms, improving the adaptability and versatility of the structure. The smooth transition between the first and second outer surfaces of the air outlet body not only enhances the overall structural strength but also facilitates smooth airflow and reduces eddies and resistance losses. By setting connectors in the transition area near the air outlet end to fix the air outlet body to the support frame, the support point is closer to the area of ​​drastic airflow changes, effectively distributing the airflow impact force and equipment vibration load, improving the stability and durability of the connection structure, and avoiding loosening or cracking due to long-term operation.

[0024] (2) The connecting hole matches the outer surface contour of the air outlet body, ensuring a tight fit between the air outlet body and the connecting plate, increasing the welding contact area, and improving the connection strength and sealing performance. A double-layer welding connection method is adopted to form a stable force transmission path, effectively resisting vibration and airflow impact, and preventing weld fatigue cracking. This structure is reliable, easy to process, and facilitates modular manufacturing and rapid on-site assembly.

[0025] (3) The clamps not only provide precise positioning before welding, ensuring accurate alignment between the air outlet body and the connecting hole, thus improving assembly accuracy and efficiency, but also provide additional mechanical clamping force after welding, enhancing the structural stability between the air outlet body and the connecting parts. Simultaneously, the clamps reinforce the connection between the air outlet body and the fan, effectively suppressing loosening or air leakage caused by vibration at the connection point, further improving the overall sealing and vibration resistance of the structure. Attached Figure Description

[0026] Figure 1 This is a partial view of a fan according to this utility model.

[0027] Figure 2 This is a partial view of the support frame.

[0028] Figure 3 It is a 3D view of the air outlet structure with the support frame hidden.

[0029] Figure 4 It is a 3D view of the air vent itself.

[0030] Figure 5 This is a 3D view of the connector.

[0031] In the diagram, 100 is the fan; 200 is the silencer; 300 is the air outlet structure; 310 is the support frame; 311 is the mounting hole; 312 is the connecting boss; 320 is the air outlet body; 321 is the air inlet end; 322 is the air outlet end; 323 is the first outer surface; 324 is the second outer surface; 325 is the gas passage; 330 is the connector; 331 is the connecting plate; 332 is the connecting hole; 340 is the clamp; and 350 is the flange. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0034] like Figures 1 to 5 As shown, the present invention provides an air outlet structure for a fan, which is connected between the fan 100 and the silencer 200, and includes a support frame 310, an air outlet body 320, and a connector 330.

[0035] Specifically, the support frame 310 constitutes the support component of the entire air outlet structure 300, and is placed on a support platform (e.g., the ground); the air outlet body 320 has an internal gas passage 325, which includes an inlet end 321 and an outlet end 322 that are connected to each other. The inlet end 321 is fixedly connected to the air outlet of the fan 100, and the outlet end 322 is fixedly connected to the air inlet of the silencer 200. The gas passage 325 is used to guide the airflow discharged from the fan 100 into the silencer 200, and the airflow at the outlet end 322... The cross-sectional shape is different from that of the air inlet end 321; the connector 330 is fixedly connected between the support frame 310 and the air outlet body 320; wherein, the air outlet body 320 includes a first outer surface 323 and a second outer surface 324, one end of the first outer surface 323 is connected to the air inlet end 321, one end of the second outer surface 324 is connected to the air outlet end 322, the first outer surface 323 and the second outer surface 324 are smoothly connected, and the connector 330 is fixedly disposed at the end of the first outer surface 323 near the second outer surface 324.

[0036] In this design, by setting an air outlet body 320 with an inlet end 321 and an outlet end 322 having different flow cross-sectional shapes, a smooth transition connection can be achieved between the air outlet of the fan 100 and the air inlet of the silencer 200. This is particularly suitable for devices with inconsistent interface forms, improving the adaptability and versatility of the structure. The smooth transition between the first outer surface 323 and the second outer surface 324 of the air outlet body 320 not only enhances the overall structural strength but also facilitates smooth airflow, reducing eddies and resistance losses. By setting a connector 330 in the transition area near the outlet end 322 to fix the air outlet body 320 to the support frame 310, the support point is closer to the area of ​​drastic airflow changes, effectively distributing the airflow impact force and equipment vibration load, improving the stability and durability of the connection structure, and preventing loosening or cracking due to long-term operation.

[0037] In one embodiment, the air inlet end 321 and the air outlet end 322 are arranged opposite to each other.

[0038] The air inlet end 321 and the air outlet end 322 are positioned opposite each other, making the gas passage 325 arranged in a straight or near-straight line. This results in a more direct airflow path, significantly reducing flow resistance and energy loss when the airflow passes through the air outlet structure 300, and improving the ventilation efficiency of the fan 100 system. At the same time, this layout is simple in structure, occupies little space, and is easy to install and maintain. It is particularly suitable for installation environments with limited space, enhancing the practicality and compactness of the structure.

[0039] In another embodiment, the air inlet end 321 and the air outlet end 322 have different orientations on the air outlet body 320.

[0040] By setting the air inlet end 321 and the air outlet end 322 to different orientations (such as at a certain angle), the airflow direction can be flexibly adjusted to meet the needs of complex on-site duct layouts, avoid the need for additional elbows or deflection fittings, simplify the system structure, and reduce material costs and installation difficulty. This design enhances the adaptability of the air outlet structure 300, and is especially suitable for asymmetrical or compact equipment layouts that require changes in airflow direction.

[0041] Preferably, the air inlet end 321 has a square flow cross section, and the air outlet end 322 has a circular flow cross section.

[0042] This design is specifically tailored to the common operating condition where the outlet of the fan 100 is mostly square, while the inlet of some silencers 200 is circular, achieving an efficient transition between square and circular cross-sections. The square inlet facilitates matching with the standard interface of the fan 100, while the circular outlet is beneficial for connection with the standard flange of the silencer 200, improving interchangeability and assembly efficiency. At the same time, by optimizing the internal transition surface design, it can effectively reduce airflow separation and turbulence caused by abrupt changes in cross-section, improve the flow field distribution, reduce local pressure loss and aerodynamic noise, and enhance the overall system performance.

[0043] It is worth mentioning that the connector 330 includes a connecting plate 331 and a connecting hole 332 provided on the connecting plate 331. The shape of the connecting hole 332 matches the end profile of the first outer surface 323. The air outlet body 320 is fixed in the connecting hole 332 by welding, and the connecting plate 331 is fixed on the support frame 310 by welding.

[0044] The connecting hole 332 matches the outer surface contour of the air outlet body 320, ensuring a tight fit between the air outlet body 320 and the connecting plate 331, increasing the welding contact area, and improving connection strength and sealing. A double-layer welding connection method is adopted (the air outlet body 320 is welded into the connecting hole 332, and the connecting plate 331 is then welded to the support frame 310), forming a stable force transmission path, effectively resisting vibration and airflow impact, and preventing weld fatigue cracking. This structure offers reliable connection, simple processing, and facilitates modular manufacturing and rapid on-site assembly.

[0045] Reference Figure 1 and Figure 3 A clamp 340 is provided on the outer wall of the air outlet body 320. The inner wall of the clamp 340 is tightly fitted with the outer wall of the air outlet body 320. It is used to assist in the positioning and connection of the air outlet body 320 and the connection hole 332, and to strengthen the connection between the air outlet body 320 and the fan 100.

[0046] The clamp 340 not only provides precise positioning before welding, ensuring accurate alignment between the outlet body 320 and the connecting hole 332, thus improving assembly precision and efficiency, but also provides additional mechanical clamping force after welding, enhancing the structural stability between the outlet body 320 and the connector 330. Simultaneously, the clamp 340 reinforces the connection between the outlet body 320 and the fan 100, effectively suppressing loosening or air leakage caused by vibration at the connection point, further improving the overall structure's sealing and vibration resistance.

[0047] Furthermore, the support frame 310 is provided with mounting holes 311 that match the shape of the connecting plate 331. The sidewall of the mounting hole 311 extends toward its center to form a connecting boss 312. The connecting boss 312 abuts against the connecting plate 331 and is fixed by welding.

[0048] The design of the connecting boss 312 allows the connecting plate 331 to be embedded inside and abut against the support frame 310, forming a composite connection structure of "embedding + abutting + welding". This significantly increases the connection area and structural rigidity, effectively disperses stress concentration, and improves the connection strength and seismic resistance between the support frame 310 and the connecting member 330. This structure avoids the weak points that are prone to occur in traditional surface lap welding, making the overall load-bearing capacity stronger and the long-term operation safer and more reliable.

[0049] Preferably, both the connecting plate 331 and the mounting hole 311 are square structures.

[0050] The square-structured connecting plate 331 mates with the mounting hole 311, providing excellent torsional resistance and effectively preventing rotation or displacement of the connecting plate 331 under stress, thus ensuring structural stability. Simultaneously, the square profile facilitates machining, alignment, and welding operations, improving production efficiency and assembly accuracy. This design balances strength with manufacturability, benefiting mass production and quality control.

[0051] A flange 350 is welded and fixed to the air outlet end 322 of the air outlet body 320. The flange 350 is used for detachable connection with the silencer 200.

[0052] A welded flange 350 is installed at the air outlet end 322, allowing for a detachable connection between the air outlet structure 300 and the silencer 200 via bolts or other fasteners. This facilitates the installation, disassembly, maintenance, and replacement of the equipment. The welding method ensures the connection strength and sealing between the flange 350 and the air outlet body 320, preventing loosening or air leakage during use. This design balances connection reliability with ease of maintenance, improving the system's maintainability and service life.

[0053] This solution also proposes a fan 100, including the aforementioned air outlet structure 300 for the fan 100.

[0054] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0056] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An air outlet structure for a fan, connected between the fan and a silencer, characterized in that, The air outlet structure includes: Support frame; The air outlet body has an internal gas channel, which includes an air inlet end and an air outlet end that are connected to each other. The air inlet end is fixedly connected to the air outlet of the fan, and the air outlet end is fixedly connected to the air inlet of the silencer. The gas channel is used to guide the airflow discharged by the fan into the silencer. The flow cross-sectional shape of the air outlet end is different from that of the air inlet end. A connector is fixedly connected between the support frame and the air outlet body; wherein, The air outlet body includes a first outer surface and a second outer surface. One end of the first outer surface is connected to the air inlet end, and one end of the second outer surface is connected to the air outlet end. The first outer surface and the second outer surface are smoothly connected. The connector is fixedly disposed at the end of the first outer surface near the second outer surface.

2. The air outlet structure for a fan as described in claim 1, characterized in that, The air inlet end and the air outlet end are arranged opposite to each other.

3. The air outlet structure for a fan as described in claim 1, characterized in that, The air inlet end and the air outlet end have different orientations on the air outlet body.

4. The air outlet structure for a fan as described in claim 1, characterized in that, The air inlet has a square cross-section, and the air outlet has a circular cross-section.

5. The air outlet structure for a fan as described in claim 1, characterized in that, The connector includes a connecting plate and a connecting hole disposed on the connecting plate. The shape of the connecting hole matches the end contour of the first outer surface. The air outlet body is fixed in the connecting hole by welding, and the connecting plate is fixed on the support frame by welding.

6. The air outlet structure for a fan as described in claim 5, characterized in that, A clamp is provided on the outer wall of the air outlet body. The inner wall of the clamp fits tightly against the outer wall of the air outlet body to assist in the positioning and connection of the air outlet body with the connecting hole and to reinforce the connection between the air outlet body and the fan.

7. The air outlet structure for a fan as described in claim 5, characterized in that, The support frame is provided with mounting holes that match the shape of the connecting plate. The sidewall of the mounting hole extends toward its center to form a connecting boss. The connecting boss abuts against the connecting plate and is fixed by welding.

8. The air outlet structure for a fan as described in claim 7, characterized in that, Both the connecting plate and the mounting holes are square structures.

9. The air outlet structure for a fan as described in claim 1, characterized in that, A flange is welded and fixed to the air outlet end of the air outlet body, and the flange is used for detachable connection with the silencer.

10. A fan, characterized in that, Includes an air outlet structure for a fan as described in any one of claims 1 to 9.

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