Air inlet panel and range hood comprising same

Abstract

The utility model provides an air inlet panel and a range hood comprising the same, an air inlet is formed in the middle area of the air inlet panel, the air inlet panel further comprises flow guide parts, the flow guide parts are arranged on the two opposite sides of the air inlet in the width direction of the air inlet panel, and the flow guide parts are arranged in the width direction of the air inlet panel. The air inlet panel is provided with an air inlet and an air outlet, the air inlet panel is provided with a flow guide portion, the flow guide portion is recessed inwards from the surface of the air inlet panel and comprises a backflow face, the backflow face is located at the end, away from the air inlet, of the flow guide portion, and one end of the backflow face is obliquely arranged towards the air inlet from the air inlet direction of the air inlet. And the flow guide part comprises a backflow surface to form an impact deceleration area for escaping oil smoke, and the oil smoke escaping from the air inlet is re-drained to the air inlet by utilizing the Coanda effect, so that the problem of oil smoke escape when the smoke amount is relatively large is solved. And meanwhile, one end, far away from the air inlet, of the backflow surface effectively drains the oil fume, so that interference on inlet airflow normally flowing into the air inlet is avoided, and the escape amount when the oil fume amount is large is reduced.

Description

Technical Field

[0001] This utility model relates to the field of air intake panel technology, and in particular to an air intake panel and a range hood containing the same. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. With rising living standards and health awareness, consumers are demanding increasingly higher levels of smoke extraction efficiency from range hoods. Research has found that increasing the airflow velocity at the range hood's inlet has become an effective technique for improving smoke extraction. To ensure sufficient smoke collection, the inlet area of ​​a range hood is typically designed to be relatively large. To significantly increase the inlet velocity, the airflow volume of the range hood needs to be significantly increased. However, significantly increasing airflow volume under noise constraints is technically more difficult. Therefore, the conventional approach is to reduce the inlet area to increase the inlet velocity. Reducing the inlet area by half while maintaining the same airflow volume can double the inlet velocity. In cases of heavy smoke, a smaller inlet area can lead to insufficient air intake. Because some smoke cannot enter in time but remains at a high velocity due to the suction force, it easily escapes, making secondary extraction difficult and resulting in a poor user experience. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art, which makes it easy for oil fumes to escape when the air inlet size is reduced, and to provide an air inlet panel and a range hood containing the panel.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] An air inlet panel, wherein an air inlet is provided in the middle region of the air inlet panel, and the air inlet panel further includes:

[0006] A flow guide is provided on opposite sides of the air inlet along the width direction of the air inlet panel. The flow guide is recessed inward from the surface of the air inlet panel. The flow guide includes a return surface located at the end of the flow guide away from the air inlet. One end of the return surface is inclined towards the air inlet from the air inlet direction.

[0007] In this solution, a flow guide section, including a return flow surface, is incorporated to create an impact deceleration zone for escaping fumes. Utilizing the Coanda effect, the fumes escaping from the air inlet are redirected back to the air inlet, thus overcoming the problem of fume escape when the volume is large. Simultaneously, the end of the return flow surface furthest from the air inlet effectively guides the fumes, preventing interference with the normal high-speed airflow into the air inlet and reducing the amount of fumes escaping when the volume is large.

[0008] Preferably, the flow guide further includes a flow guide surface, one end of which is inclined inward from the surface of the air inlet panel, and the other end of which is connected to the return flow surface.

[0009] In this solution, the above settings ensure that there is a relatively sufficient impact deceleration space at the junction of the guide surface and the return surface during the diversion process, and also prevent excessive kinetic energy loss at the junction from causing stagnation and affecting the return flow to the air inlet.

[0010] Preferably, the air inlet panel further includes a flow stabilizing section, which is located between the end of the guide surface near the air inlet and the air inlet. The flow stabilizing section has a straight cross-section and coincides with the surface of the air inlet panel.

[0011] In this design, the above-mentioned configuration ensures that the escaping airflow has sufficient space to fit against the guide section.

[0012] Preferably, the cross-section of the reflux surface is an arc-shaped structure.

[0013] In this solution, the above settings enable the escaped fumes to be effectively weakened and separated, stably diverted, and then smoothly changed direction to flow back into the air inlet after diversion.

[0014] Preferably, the radius of the central angle corresponding to the reflux surface is in the range of 5-30mm.

[0015] In this solution, the above settings are used to ensure the effectiveness of traffic generation.

[0016] Preferably, the end of the return surface away from the air inlet is inclined toward the air inlet and forms a first angle with the air inlet direction, the first angle being in the range of 0-20°.

[0017] In this solution, the above settings are used to ensure the effect of changing the flow direction and to prevent impact on the airflow that has not yet left the guide section, thus affecting the diversion effect.

[0018] Preferably, the guide surface is recessed inward and forms a second angle with the surface of the air inlet panel, the second angle being in the range of 10-25°.

[0019] In this solution, the above-mentioned settings ensure that the guide section has a relatively sufficient space to decelerate the escaping fumes.

[0020] Preferably, the length of the guide surface is in the range of 20-50mm along the width direction of the air inlet panel.

[0021] In this solution, the above settings are used to ensure the size of the impact deceleration space.

[0022] Preferably, the value of the stabilizing section is in the range of 5-15 mm.

[0023] In this solution, the above settings are used to avoid the situation where the flow stabilization section is too large and it is difficult to capture the escaping fumes.

[0024] A range hood includes an air inlet panel as described above.

[0025] In this solution, the range hood includes the aforementioned air inlet panel to reduce noise, prevent oil fumes from escaping, and improve the user experience while ensuring high-speed air intake.

[0026] The positive and progressive effects of this invention are as follows: By incorporating a flow guide section, including a return flow surface, an impact deceleration zone is formed to deflect escaping fumes. Utilizing the Coanda effect, the fumes escaping from the air inlet are redirected back to the air inlet, thus overcoming the problem of fumes escaping when the volume is large. Simultaneously, the end of the return flow surface furthest from the air inlet effectively guides the fumes, avoiding interference with the normal high-speed airflow into the air inlet and reducing the amount of fumes escaping when the volume is large. Attached Figure Description

[0027] Figure 1 This is a perspective view of a range hood according to a preferred embodiment of the present invention.

[0028] Figure 2 This diagram shows the positional relationship between the air inlet and the air guide in a preferred embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the flow guide portion according to a preferred embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] Air intake panel 10

[0032] Air inlet 11

[0033] Guide section 1

[0034] Reflux Surface 2

[0035] Guide surface 3

[0036] Steady flow section 4

[0037] First included angle α

[0038] Second included angle β Detailed Implementation

[0039] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0040] This embodiment provides an air inlet panel 10, the specific structure of which is as follows: Figure 1 , Figure 2 and Figure 3 As shown, an air inlet 11 is provided in the middle area of ​​the air inlet panel 10, and the air inlet panel 10 also includes:

[0041] The air guide 1 is disposed on opposite sides of the air inlet 11 along the width direction of the air inlet panel 10. The air guide 1 is recessed inward from the surface of the air inlet panel 10. The air guide 1 includes a return surface 2, which is located at the end of the air guide 1 away from the air inlet 11. One end of the return surface 2 is inclined towards the air inlet 11 from the air inlet direction.

[0042] Specifically, the air inlet panel 10 is embedded in the smoke hood, and the guide portion 1 extends along the width direction of the air inlet panel 10. The guide portion 1 is disposed on the air inlet panel 10 and is recessed from the air inlet panel 10 toward the smoke hood to form a buffer area for accommodating the oil fumes escaping from the air inlet 11. In the recessed case, a return surface 2 is formed at the end of the guide portion 1 away from the air inlet 11. The end of the return surface 2 away from the air inlet 11 is inclined toward the air inlet 11 from the air intake direction of the air inlet 11. Although reducing the size of the air inlet 11 increases the airflow velocity, when the amount of smoke is large, the amount of smoke entering the air inlet 11 is limited, causing some oil fumes to escape in the width direction of the air inlet panel 10 instead of entering the air inlet 11 in time. By setting the guide section 1, which includes a return surface 2, an impact deceleration zone for the escaped oil fumes is formed. The Coanda effect in the prior art is used to guide the oil fumes that escape from the air inlet 11 back to the air inlet 11, thereby capturing the escaped oil fumes again and letting them flow into the air inlet 11, thus overcoming the problem of oil fume escape when the amount of smoke is large.

[0043] Meanwhile, the end of the return surface 2 away from the air inlet 11 effectively guides the oil fumes. Compared with the end of the return surface 2 close to the air inlet 11, it can avoid interfering with the high-speed airflow that normally flows into the air inlet 11, thereby reducing the amount of oil fumes that escape when the amount of oil fumes is large.

[0044] In this embodiment, the flow guide 1 also includes a flow guide surface 3. One end of the flow guide surface 3 is inclined inward from the surface of the air inlet panel 10, and the other end of the flow guide surface 3 is connected to the return flow surface 2.

[0045] Specifically, when the flow guide 1 is recessed towards the smoke hood, it forms a return flow surface 2 and a flow guide surface 3. The flow guide surface 3 is located between the air inlet 11 and the return flow surface 2. By additionally setting the flow guide surface 3 to increase the size of the recess in the flow guide 1, it is ensured that there is a relatively sufficient impact deceleration space in the flow guide 1 during the flow diversion. The flow guide surface 3 and the return flow surface 2 are smoothly transitioned at the end near the air inlet 11 to avoid excessive kinetic energy loss at the connection point, which would cause stagnation and affect the effect of returning to the air inlet 11.

[0046] In this embodiment, the air inlet panel 10 further includes a flow stabilizing section 4, which is located between the end of the guide surface 3 near the air inlet 11 and the air inlet 11. The cross-section of the flow stabilizing section 4 is a straight line, and the flow stabilizing section 4 coincides with the surface of the air inlet panel 10.

[0047] Specifically, from a cross-sectional perspective, the flow stabilizing section 4 is a straight line. The flow stabilizing section 4 extends along the width direction of the air inlet panel 10. The flow stabilizing section 4 is located between the guide surface 3 and the air inlet 11. By setting the flow stabilizing section 4, the guide section 1 and the air inlet 11 are spaced apart to avoid interference with the high-speed airflow that normally enters the air inlet 11 when the guide section 1 and the air inlet 11 are set adjacent to each other. This reduces the amount of oil fume escaping at the air inlet 11 when the amount of oil fume is large.

[0048] It is understandable that when the escaping fumes at the air inlet 11 enter the guide section 1, they first pass through the flow stabilizing section 4. The flow stabilizing section 4 overlaps with the surface of the air inlet panel 10, which can prevent the escaping fumes from moving away from the air inlet panel 10. That is, the escaping fumes can smoothly transition and flow into the guide section 1.

[0049] In this embodiment, the cross-section of the return surface 2 is an arc-shaped structure. The cross-section of the guide surface 3 is an inclined straight line. The guide surface 3 is inclined from the surface of the air inlet panel 10 toward the smoke hood, so that the guide part 1 is recessed inward. The return surface 2, which is connected to the guide surface 3, is arc-shaped. Compared with the surface parallel to the air inlet direction, it can effectively weaken the separation of the escaped oil fumes, stably guide them, and smoothly change the flow direction after guidance so as to re-flow into the air inlet 11.

[0050] In this embodiment, the radius of the central angle corresponding to the return surface 2 ranges from 5 to 30 mm. The arc-shaped structure of the return surface 2 is a standard circular arc, which has a central angle and a radius, wherein the radius of the central angle ranges from 5 to 30 mm. By limiting the radius, it is to avoid the radius being too small, which would impact the airflow that has not yet left the guide section 1 and affect the diversion effect when the oil fumes are finally diverted to the air inlet 11.

[0051] In this embodiment, the end of the return surface 2 that is away from the air inlet 11 is inclined toward the air inlet 11 and forms a first angle α with the air inlet 11. The value of the first angle α is in the range of 0-20°.

[0052] Specifically, the air inlet 11 is perpendicular to the surface of the air inlet panel 10. Taking the air inlet 11 as the reference, the end of the return surface 2 away from the air inlet 11 is inclined towards the air inlet 11 from the air inlet direction, and the inclination angle is the first included angle α, so as to ensure the effect of changing the flow direction and prevent the airflow that has not yet left the guide part 1 from impacting the flow guiding effect.

[0053] In this embodiment, the guide surface 3 is recessed inward and forms a second angle β with the surface of the air inlet panel 10, the value of the second angle β being 10-25°.

[0054] Specifically, taking the surface of the flow stabilizing section 4 or the air inlet panel 10 as a reference, the guide surface 3 is inclined toward the smoke hood to achieve an inward concavity. The guide surface 3 forms a second included angle β with the surface of the flow stabilizing section 4 or the air inlet panel 10. By limiting the range of the second included angle β, it is ensured that the guide section 1 has a relatively sufficient impact deceleration space for the escaping oil fumes.

[0055] In this embodiment, the length of the guide surface 3 along the width direction of the air inlet panel 10 is L2, and the value of L2 ranges from 20 to 50 mm. By limiting the length of the guide surface 3, the size of the impact deceleration space is ensured along the width direction of the air inlet panel 10.

[0056] In this embodiment, the length of the flow stabilizing section 4 is L1, and the value of L1 ranges from 5 to 15 mm. By limiting the extension dimension of the flow stabilizing section 4, it is possible to avoid the flow stabilizing section 4 being too large, causing the guide section 1 to be too far from the air inlet 11, making it difficult to capture escaped fumes. This embodiment also provides a range hood, which includes the aforementioned air inlet panel 10, to reduce noise, prevent fumes from escaping, and improve the user experience while maintaining a constant fan speed and ensuring high-speed air intake.

[0057] 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. An air inlet panel having an air inlet opening in a central region thereof, characterised in that, The air inlet panel also includes: A flow guide is provided on opposite sides of the air inlet along the width direction of the air inlet panel. The flow guide is recessed inward from the surface of the air inlet panel. The flow guide includes a return surface located at the end of the flow guide away from the air inlet. One end of the return surface is inclined towards the air inlet from the air inlet direction.

2. The air intake panel of claim 1, wherein, The flow guide section also includes a flow guide surface, one end of which is inclined inward from the surface of the air inlet panel, and the other end of which is connected to the return flow surface.

3. The air intake panel of claim 2, wherein, The air inlet panel also includes a flow stabilizing section, which is located between the end of the guide surface near the air inlet and the air inlet. The flow stabilizing section has a straight cross-section and coincides with the surface of the air inlet panel.

4. The air inlet panel as described in claim 1, characterized in that, The cross-section of the reflux surface is an arc-shaped structure.

5. The air intake panel of claim 4, wherein, The radius of the central angle corresponding to the reflux surface ranges from 5 to 30 mm.

6. The air intake panel of claim 5, wherein, The end of the return surface away from the air inlet is inclined toward the air inlet and forms a first angle with the air inlet's air intake direction, the first angle being 0-20°.

7. The air intake panel of claim 2, wherein, The air guide surface is recessed inward and forms a second angle with the surface of the air inlet panel, the second angle being in the range of 10-25°.

8. The air intake panel of claim 2, wherein, Along the width direction of the air inlet panel, the length of the guide surface ranges from 20 to 50 mm.

9. The air intake panel of claim 3, wherein, The value range of the stabilizing section is 5-15mm.

10. A range hood characterized by, The range hood includes an air inlet panel as described in any one of claims 1-9.

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