Range hood

Abstract

The utility model provides a range hood which comprises a fan and further comprises a fan support which is of a structure shaped like a Chinese character'ji 'and comprises a first plane, a second plane and a supporting portion. The first plane and the second plane are connected through the supporting part and form an air inlet area in the projection direction of the first plane, the air inlet area is arranged in the air inlet direction of the draught fan, the first plane is connected with the draught fan, the second plane is connected with a draught fan frame rear plate of the extractor hood, and the draught fan frame rear plate is connected with the draught fan. A flow guide hole is formed in the supporting part, and the flow guide hole is communicated with the air inlet area. And the supporting part is provided with the flow guide hole corresponding to the air inlet area, so that the airflow flowing from the side part of the air inlet area can enter the air inlet area through the flow guide hole, the weight of the fan bracket is reduced, the resistance to the airflow on the peripheral side of the fan bracket is reduced, and the air inlet efficiency is further improved.

Description

Technical Field

[0001] The utility model particularly relates to an oil fume extractor. Background Art

[0002] As the power component of the whole machine, the fan system is the power source of the whole machine and also the source of vibration and noise of the whole machine. Therefore, it is particularly important to control the vibration and noise of the power component.

[0003] In the prior art, two small brackets are often respectively installed on the left and right sides of the fan system and fixed on the left and right side plates of the fan frame through the two brackets. Although this can effectively support the fan system, when the airflow flowing to the fan system enters the fan frame and the fan system in the lower air inlet area, due to the local installation structure, the airflow in the fan frame is disordered, affecting the oil fume extraction efficiency and also resulting in noise, affecting the user experience. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an oil fume extractor to overcome the defect that the fan bracket in the prior art affects the aerodynamic performance.

[0005] The utility model solves the above technical problem through the following technical solutions:

[0006] An oil fume extractor, the oil fume extractor includes a fan, and the oil fume extractor further includes:

[0007] A fan bracket, the fan bracket is in a "U" - shaped structure. The fan bracket includes a first plane, a second plane and a support portion. The first plane and the second plane are connected by the support portion and form an air inlet area along the projection direction of the first plane. The air inlet area is arranged along the air inlet direction of the fan. The first plane is connected to the fan, the second plane is connected to the rear plate of the fan frame of the oil fume extractor, and a diversion hole is opened on the support portion, and the diversion hole is communicated with the air inlet area.

[0008] In this solution, by setting the fan bracket into a "U" - shaped structure to form an air inlet area corresponding to the air inlet direction of the fan, the air inlet area can enable the airflow to enter the fan without being blocked by the bracket, reducing the resistance to the airflow and improving the air inlet efficiency. In addition, the fan is effectively supported by the first plane, the second plane and the support portion, reducing the noise caused by the vibration of the fan. The support portion is provided with a diversion hole corresponding to the air inlet area, so that the airflow flowing from the side of the air inlet area can enter the air inlet area through the diversion hole. While reducing the weight of the fan bracket, it reduces the resistance to the airflow around the fan bracket and further improves the air inlet efficiency.

[0009] Preferably, a diversion protrusion is annularly arranged at the hole opening of the diversion hole, and the diversion protrusion extends towards the air inlet area.

[0010] In this solution, the above-mentioned arrangement facilitates the flow of air near the support to the air intake area, preventing local airflow from accumulating due to resistance.

[0011] Preferably, the support portion has a trapezoidal structure, and the guide hole is a trapezoidal hole.

[0012] In this solution, the above-mentioned configuration is used to enhance the structural strength of the wind turbine support by utilizing a trapezoidal structure or trapezoidal holes.

[0013] Preferably, a reinforcing rib is provided at the connection between the support and the second plane, and multiple reinforcing ribs are provided, with a spacing of 50-60mm between adjacent reinforcing ribs.

[0014] In this solution, the above-mentioned settings are used to improve the structural strength of the wind turbine support and prevent the connection between the support and the second plane from breaking due to wind turbine vibration.

[0015] Preferably, along the length of the fan bracket, the distance between the two ends of the fan bracket and the corresponding side plates of the fan frame of the range hood is 15-36mm.

[0016] In this solution, the above-mentioned arrangement is used to avoid the two ends of the fan bracket from contacting the opposite side plates of the fan frame, thereby reducing the transmission of fan vibration from the fan bracket to the side plates and thus reducing noise.

[0017] Preferably, along the width direction of the wind turbine support, the width ratio of the second plane to the width of the first plane is 1.8-2:1.

[0018] In this solution, the above-mentioned settings ensure that the wind turbine support saves space and costs while maximizing the structural strength of the support.

[0019] Preferably, the width of the first plane is less than or equal to 40 mm.

[0020] In this scheme, the structural strength of the first plane is ensured by limiting the width of the first plane.

[0021] Preferably, along the length of the fan bracket, the support portion and the edge of the first plane are provided with a guide portion, the guide portion extends toward the air inlet area, and the extension dimension of the guide portion decreases from the end of the first plane toward the middle area of ​​the first plane.

[0022] In this solution, through the above settings, the airflow entering the air inlet area can be effectively guided. At the same time, the guiding part decreases from the end of the first plane towards the middle area of the first plane. Without affecting the air inlet efficiency, the area where the extension dimension of the guiding part decreases corresponds to the airflow convergence area, thereby improving the air inlet efficiency.

[0023] Preferably, the range hood further includes a first noise reduction part, which is arranged on the rear plate of the fan frame and corresponds to the fan. The first noise reduction part includes a first sound absorption member, which is arranged in the middle area of the rear plate of the fan frame. Second sound absorption members are arranged on both sides of the first sound absorption member. The second sound absorption members are arranged at intervals with the first sound absorption member. The side of the second sound absorption member facing the first sound absorption member has a wavy structure.

[0024] In this solution, through the above settings, when the airflow flows into the fan, the first noise reduction part guides the airflow and absorbs noise, so that the airflow noise entering the fan is correspondingly reduced.

[0025] Preferably, the range hood further includes a second noise reduction part. One end of the second noise reduction part is connected to the rear plate of the fan frame. The fan support is located between the first noise reduction part and the second noise reduction part. The second noise reduction part has a horn-shaped structure along the air inlet direction of the fan, and the end with a smaller size of the second noise reduction part is communicated with the air inlet area.

[0026] In this solution, through the above settings, the second noise reduction part can effectively guide the airflow before the airflow enters the fan, so that when the airflow passes through the second noise reduction part and flows through the fan support, the airflow is stable and the noise is correspondingly reduced.

[0027] The positive and progressive effects of the present utility model are as follows: By setting the fan support in a "Ji" - shaped structure, an air inlet area is formed corresponding to the air inlet direction of the fan. This air inlet area enables the airflow to enter the fan without being blocked by the support, reducing the resistance to the airflow and improving the air inlet efficiency. In addition, the fan is effectively supported by the first plane, the second plane and the support part, reducing the noise caused by the vibration of the fan. The support part is provided with diversion holes corresponding to the air inlet area, so that the airflow flowing from the side of the air inlet area can enter the air inlet area through the diversion holes. While reducing the weight of the fan support, the resistance to the airflow around the fan support is reduced, further improving the air inlet efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 ]>[[ID=2I]]It is a diagram showing the positional relationship between the fan and the fan support in a preferred embodiment of the present utility model.

[0029] Figure 2 It is a diagram showing the positional relationship between the fan and the rear plate of the fan frame in a preferred embodiment of the present utility model.

[0030] Figure 3 This diagram shows the positional relationship between the fan bracket, the first noise reduction part, and the second noise reduction part in a preferred embodiment of the present invention.

[0031] Figure 4 This is a perspective view of a fan bracket according to a preferred embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] Fan 1

[0034] Fan bracket 2

[0035] First plane 21

[0036] Second plane 22

[0037] Support section 23

[0038] Air intake area 24

[0039] 25mm guide protrusion

[0040] Flow guide section 26

[0041] Wind turbine frame rear plate 3

[0042] Flow guide hole 231

[0043] Reinforcing rib 4

[0044] First noise reduction section 6

[0045] First sound-absorbing component 61

[0046] Second sound-absorbing component 62

[0047] Second noise reduction section 7 Detailed Implementation

[0048] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0049] This embodiment provides a range hood, the specific structure of which is as follows: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the range hood includes a fan 1, and also includes:

[0050] The fan support 2 is in a "U" - shaped structure. The fan support 2 includes a first plane 21, a second plane 22 and a support portion 23. The first plane 21 and the second plane 22 are connected by the support portion 23 and form an air inlet area 24 along the projection direction of the first plane 21. The air inlet area 24 is arranged along the air inlet direction of the fan 1. The first plane 21 is connected to the fan 1, the second plane 22 is connected to the rear plate 3 of the fan frame of the range hood, and a diversion hole 231 is formed on the support portion 23, and the diversion hole 231 is communicated with the air inlet area 24.

[0051] Specifically, the number of the first planes 21 is one, the number of the second planes 22 and the support portions 23 is two. The first plane 21, the second plane 22 and the support portion 23 are integrally formed and form a "U" - shaped structure, and a through - air inlet area 24 is formed along the projection direction of the first plane 21.

[0052] Among them, the first plane 21 is used for bolt - connecting with the volute of the fan 1, the second plane 22 is used for bolt - connecting with the rear plate 3 of the fan frame. Through the fan support 2, the fan 1 and the rear plate 3 of the fan frame are arranged at an interval. The air inlet area 24 is arranged along the air inlet direction of the fan 1, so that air flow can flow into the space between the fan 1 and the rear plate 3 of the fan frame from the air inlet area 24, and then enter the air inlet of the fan 1. It realizes that when the air flow enters the fan 1, it is not blocked by the support, reduces the resistance to the air flow, and improves the air inlet efficiency.

[0053] In this embodiment, the fan 1 is effectively supported by the first plane 21, the second plane 22 and the support portion 23, and the noise caused by the vibration of the fan 1 is reduced.

[0054] In addition, a diversion hole 231 is formed on the support portion 23. The diversion hole 231 is arranged through and communicated with the air inlet area 24. When the air flow flows along the outer peripheral side of the fan support 2, the air flow is diverted to the air inlet area through the diversion hole 231. While reducing the weight of the fan support 2, the resistance to the air flow around the fan support 2 is reduced, and the air inlet efficiency is further improved.

[0055] In this embodiment, a diversion protrusion 25 is annularly arranged at the orifice of the diversion hole 231, and the diversion protrusion 25 extends towards the air inlet area 24.

[0056] Specifically, the diversion protrusion 25 is a plate extending towards the air inlet area 24. The diversion protrusion 25 extends from the orifice of the diversion hole 231 towards the air inlet area 24, and the extension dimension is 1 - 3 mm.

[0057] Preferably, the extension dimension is 2 mm.

[0058] The connection between the diversion protrusion 25 and the diversion hole 231 has a smooth transition, so as to facilitate the diversion of the air flow near the support portion 23 to the air inlet area 24 and avoid the accumulation of local air flow due to resistance.

[0059] In this embodiment, the support part 23 has a trapezoidal structure, and the guide hole 231 is a trapezoidal hole.

[0060] Specifically, in terms of appearance, the end of the support 23 that connects to the first plane 21 has a small size, while the end of the support 23 that connects to the second plane 22 has a large size. That is, the support 23 has a "trapezoidal" structure. Compared with other shapes of support 23, the "trapezoidal" structure has better stability. The trapezoidal structure can be used to improve the structural strength of the fan bracket 2, so that when the fan bracket 2 supports the fan 1, it can reduce the vibration of the fan bracket 2 itself and reduce noise.

[0061] In addition, the guide hole 231 is a trapezoidal hole, which can ensure the air intake volume on the one hand, and on the other hand, by setting the guide hole 231 as a trapezoidal hole, compared with other shapes of guide holes 231, the trapezoidal hole has better stability, so that the structural strength of the support part 23 is guaranteed when the hole is opened.

[0062] In this embodiment, a reinforcing rib 4 is provided at the connection between the support part 23 and the second plane 22. Multiple reinforcing ribs 4 are provided, and the spacing between two adjacent reinforcing ribs 4 is 50-60mm.

[0063] Specifically, there are two reinforcing ribs 4, spaced 60mm apart, and both reinforcing ribs 4 are spaced apart from the edge of the fan bracket 2. One end of the reinforcing rib 4 is connected to the second plane 22, and the other end is connected to the support part 23. The reinforcing rib 4 protrudes from the surfaces of the second plane 22 and the support part 23 to reduce deformation caused by local bending, improve the structural strength of the fan bracket 2, and prevent the connection between the support part 23 and the second plane 22 from breaking due to vibration of the fan 1.

[0064] In this embodiment, along the length of the fan bracket 2, the distance between the two ends of the fan bracket 2 and the corresponding side plates (not shown in the figure) of the fan frame of the range hood is 15-36mm.

[0065] Specifically, in addition to the rear plate 3 of the fan frame, the range hood's fan bracket also has two opposing side plates. These side plates are located on the left and right sides of the fan 1, respectively, with the fan support 2 positioned between them. The side plates are connected to the rear plate 3 of the fan frame. Since the length of the fan support 2 is limited by the distance between the side plates, and to prevent the ends of the fan support 2 from contacting the opposing side plates, the distance between the ends of the fan support 2 and the corresponding side plates is limited. This reduces the transmission of fan 1 vibration from the fan support 2 to the side plates, thereby reducing noise. In this embodiment, the distance between the ends of the fan support 2 and the corresponding opposing side plates of the range hood's fan frame is 15-20mm. In other embodiments, the distance can be 36mm to ensure the length of the fan support 2, thus ensuring its support effect and structural strength.

[0066] Furthermore, in this embodiment, along the width direction of the fan support 2, the width ratio of the second plane 22 to the width of the first plane 21 is 1.8-2:1.

[0067] Specifically, along the width direction of the wind turbine support 2, the width of the second plane 22 is greater than the width of the first plane 21, and the width ratio of the second plane 22 to the first plane 21 is 1.8-2:1. By limiting the width ratio of the first plane 21 and the second plane 22, it is ensured that the wind turbine support 2 saves space and cost, while the structure of the wind turbine support 2 can provide the highest support strength.

[0068] In this embodiment, the width of the first plane 21 is less than or equal to 40 mm.

[0069] Specifically, the width ratio of the second plane 22 to the width of the first plane 21 is 1.8-2:1, and the width of the first plane 21 is less than or equal to 40mm, for example, the width of the first plane 21 is 38mm, and the width range of the second plane 22 is 68.5-76mm. By limiting the width of the first plane 21, the width range of the second plane 22 is determined, thus ensuring the structural strength of both the first and second planes.

[0070] In this embodiment, along the length of the fan bracket 2, the support portion 23 and the edge of the first plane 21 are provided with a guide portion 26. The guide portion 26 extends toward the air inlet area 24, and the extension dimension of the guide portion 26 decreases from the end of the first plane 21 toward the middle area of ​​the first plane 21.

[0071] Specifically, the guide section 26 is made of plate material. Guide sections 26 are provided on the edges of both the support section 23 and the first plane 21 along the length of the fan bracket 2, extending towards the air inlet area 24. This effectively guides the airflow entering the air inlet area 24. The guide section 26 on the edge of the support section 23 has an extension dimension of no more than 7.5 mm, while the guide section 26 on the edge of the first plane 21 decreases in extension dimension from the end of the first plane 21 towards the middle region, specifically from 9.5 mm at the end to 3.5 mm in the middle region. Without affecting the air intake efficiency, the decreasing extension dimension area of ​​the guide section 26 corresponds to the airflow convergence area, thereby improving the air intake efficiency.

[0072] In this embodiment, the range hood also includes a first noise reduction unit 6, which is disposed on the rear plate 3 of the fan frame and corresponding to the fan 1. The first noise reduction unit 6 includes a first sound-absorbing component 61, which is disposed in the middle area of ​​the rear plate 3 of the fan frame. Second sound-absorbing components 62 are disposed on both sides of the first sound-absorbing component 61, and the second sound-absorbing components 62 are spaced apart from the first sound-absorbing component 61. The side of the second sound-absorbing component 62 facing the first sound-absorbing component 61 has a wave-shaped structure.

[0073] Specifically, the first sound-absorbing component 61 is a sound-absorbing board, and is positioned corresponding to the air inlet of the fan 1. Second sound-absorbing components 62 are positioned on both sides of the first sound-absorbing component 61. The second sound-absorbing components 62 are strip-shaped, and the side of the second sound-absorbing component 62 facing the first sound-absorbing component 61 has a wavy structure, formed by multiple interconnected arc surfaces with different curvatures. Along the air inlet direction of the fan, the airflow first passes through the fan support 2 and flows from the air inlet area 24 between the first sound-absorbing component 61 and the air inlet of the fan 1, finally flowing into the fan 1. This allows the first noise reduction section to guide and absorb noise as the airflow flows into the fan, thereby reducing the noise of the airflow entering the fan. Both the first sound-absorbing component 61 and the second sound-absorbing component 62 are made of materials with a noise absorption coefficient of 0.5 or higher, such as polyurethane.

[0074] In this embodiment, the range hood also includes a second noise reduction part 7. One end of the second noise reduction part 7 is connected to the rear plate 3 of the fan frame. The fan bracket 2 is located between the first noise reduction part 6 and the second noise reduction part 7. The second noise reduction part 7 has a trumpet-shaped structure along the air intake direction of the fan 1, and the smaller end of the second noise reduction part 7 is connected to the air intake area 24.

[0075] Specifically, the second noise reduction section 7 includes two arc-shaped components arranged in a trumpet shape. One end of each component extends into the smoke collection hood of the range hood, and the other end connects to the rear plate 3 of the fan frame. Along the air intake direction of the fan 1, the fan bracket 2 is located between the first noise reduction section 6 and the second noise reduction section 7. The two arc-shaped components, arranged in a trumpet shape, are made of materials with a noise absorption coefficient of 0.5 or higher, such as polyurethane, which are already in the prior art. This allows for effective airflow guidance through the second noise reduction section 7 before the airflow enters the fan 1, resulting in stable airflow and reduced noise as the airflow passes through the second noise reduction section 7 and flows through the fan bracket 2.

[0076] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A range hood, the range hood comprising a fan, characterized in that, The range hood further includes: A fan bracket, the fan bracket having a "U" - shaped structure. The fan bracket includes a first plane, a second plane, and a support portion. The first plane and the second plane are connected by the support portion and form an air inlet area along the projection direction of the first plane. The air inlet area is arranged along the air inlet direction of the fan. The first plane is connected to the fan, the second plane is connected to the rear plate of the fan frame of the range hood, and a diversion hole is provided on the support portion, and the diversion hole communicates with the air inlet area.

2. The range hood as described in claim 1, characterized in that, A diversion protrusion is annularly provided at the hole opening of the diversion hole, and the diversion protrusion extends towards the air inlet area.

3. The range hood as described in claim 2, characterized in that, The support portion has a "trapezoidal" structure, and the diversion hole is a trapezoidal hole.

4. The range hood as described in claim 1, characterized in that, Reinforcing ribs are provided at the connection between the support portion and the second plane. There are multiple reinforcing ribs, and the distance between adjacent two reinforcing ribs is 50 - 60 mm.

5. The range hood as described in claim 1, characterized in that, Along the length direction of the fan bracket, the distances between the two ends of the fan bracket and the opposite two side plates of the fan frame of the corresponding range hood are 15 - 36 mm.

6. The range hood as described in claim 1, characterized in that, Along the width direction of the fan bracket, the width ratio of the second plane to the first plane is 1.8 - 2:

1.

7. The range hood as described in claim 6, characterized in that, The width of the first plane is less than or equal to 40 mm.

8. The range hood as described in claim 1, characterized in that, Along the length direction of the fan bracket, diversion portions are provided at the edges of the support portion and the first plane. The diversion portions extend towards the air inlet area, and the extension dimension of the diversion portions decreases from the end of the first plane towards the middle area of the first plane.

9. The range hood as described in claim 1, characterized in that, The range hood further includes a first noise reduction portion. The first noise reduction portion is provided on the rear plate of the fan frame and corresponds to the fan. The first noise reduction portion includes a first sound - absorbing member. The first sound - absorbing member is provided in the middle area of the rear plate of the fan frame. Second sound - absorbing members are provided on both sides of the first sound - absorbing member. The second sound - absorbing members are arranged at intervals with the first sound - absorbing member, and the side of the second sound - absorbing member facing the first sound - absorbing member has a wavy structure.

10. The range hood as described in claim 9, characterized in that, The range hood further includes a second noise reduction portion. One end of the second noise reduction portion is connected to the rear plate of the fan frame. The fan bracket is located between the first noise reduction portion and the second noise reduction portion. The second noise reduction portion has a horn - shaped structure along the air inlet direction of the fan, and the end with a smaller size of the second noise reduction portion communicates with the air inlet area.

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