Air inlet structure and underneath type range hood comprising same

Abstract

The invention provides an air inlet structure and an underneath type range hood comprising the same, the air inlet structure is arranged in a box body of the range hood, the air inlet structure comprises a drainage part, the drainage part is arranged in the box body of the range hood and located between a fan system of the range hood and an air inlet of the range hood, and the drainage part is arranged in the box body of the range hood and located between the fan system of the range hood and the air inlet of the range hood. A box body of the range hood comprises a top plate, the top plate is located above a draught fan system and an air inlet of the range hood, the two opposite sides of the drainage part are connected with the upper edge of the air inlet of the range hood and the top plate in a sealed mode respectively, and the middle area of the drainage part is connected with the upper edge of the draught fan system of the range hood in a sealed mode. The drainage part is used for sealing an air inlet of the range hood and a space above a fan system of the range hood.

Description

Technical Field

[0001] This invention specifically relates to an air intake structure and a bottom-mounted range hood including the same. Background Technology

[0002] Downdraft range hoods are an important category of range hoods due to their simple and compact structure and low air intake. Downdraft range hoods consist of a hood housing, a fan system, an air inlet, and a baffle plate. The hood housing is generally designed as an inverted right-angled triangle structure that is wider at the top and narrower at the bottom along the height of the hood. The baffle plate expands the smoke collection effect by opening and closing. The fan system is placed at an angle inside the cavity, and the front plate of the volute and the front panel of the housing have a certain angle, forming a V-shaped air intake channel that is wider at the top and narrower at the bottom when viewed from the side. The air inlet is designed as a rectangle that is longer on the left and right sides and narrower on the top and bottom to match the baffle plate. In addition, the internal space of this model is large at the air inlet of the fan system near the hood housing, while the space at the air inlet area away from the hood housing is small. When viewed from the side, the smoke flow path is V-shaped. When the smoke enters the hood housing through the air inlet, the space between the fan system and the air inlet and located in the upper right of the hood housing along the height of the downdraft range hood is prone to generating a vortex area when the smoke flows.

[0003] The vortex can be a source of noise and can also compress the normal flow path, affecting the air intake at the top of the fan system and thus the fan efficiency. In addition, since this range hood only has one air inlet, for a fan system with front and rear dual-intake air intake, the air intake end near the air inlet is the main air intake area. In the internal flow field, most of the airflow will flow into the main air intake area, while the air intake end away from the air inlet is the auxiliary air intake area. It needs to compete with the main air intake area for airflow in the range hood box, causing poor air intake in the auxiliary air intake area and gas separation in the cavity, affecting the overall performance of the machine. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the main air intake area is prone to vortex zone due to the internal space of the range hood box, which affects the aerodynamic performance of the down-mounted range hood, and to provide an air intake structure and a down-mounted range hood including the same.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] An air intake structure is disposed within the housing of a range hood, the air intake structure comprising:

[0007] A drainage section is disposed within the casing of the range hood and located between the fan system and the air inlet of the range hood. The casing of the range hood includes a top plate located above the fan system and the air inlet. The opposite sides of the drainage section are respectively sealed to the upper edge of the air inlet and the top plate, and the middle area of ​​the drainage section is sealed to the upper edge of the fan system. The drainage section is used to seal the space located at the air inlet and above the fan system of the range hood.

[0008] In this solution, by setting up a diversion section to enclose the excess space above the corresponding fan system and air inlet inside the casing, the range hood with this air intake structure can capture oil fumes without them flowing into the excess space above the corresponding fan system and air inlet after entering the casing. This avoids the formation of vortex zones inside the casing, thereby reducing flow separation. Under the guidance of the diversion section, the oil fumes can flow into the fan system more quickly. When the diversion section guides the oil fumes, it can also utilize its own wall adhesion effect to reduce the problem of weak air intake in the upper part of the casing caused by the low position of the air inlet and vortex, thereby improving the efficiency of the fan system and thus improving the aerodynamic performance of the range hood.

[0009] Preferably, the cross-section of the drainage section includes a first segment and a second segment, wherein the first segment is arc-shaped and protrudes toward the fan system of the range hood, and the second segment is straight.

[0010] In this scheme, the above settings are used to make the flow of oil fumes into the fan system smoother and more stable when the first section guides the flow of oil fumes, thereby suppressing flow separation.

[0011] Preferably, the first segment is located between the upper edge of the air inlet of the range hood and the upper edge of the fan system of the range hood and is tangent to the air inlet direction.

[0012] In this solution, the above settings are used to reduce airflow separation at the air inlet, so that the airflow is smoothly drawn into the fan system.

[0013] Preferably, the range hood housing further includes a base plate, and the air intake structure further includes a diversion section. The diversion section extends from the intake section to the base plate. Two diversion sections are provided, and the two diversion sections are respectively located on opposite sides of the main air intake end of the range hood's fan system. The air inlet of the range hood is divided by the two diversion sections to form a first inlet and a second inlet that are respectively connected to the main air intake end and the auxiliary air intake end of the range hood's fan system.

[0014] In this solution, the above-mentioned configuration is used to divide the air inlet into a first inlet and a second inlet by using the diversion section. The two are independent of each other, so that when collecting oil fumes, the main air inlet and the auxiliary air inlet of the fan system can each share the oil fume flow, without competing for flow in the box, thus avoiding poor air intake in the auxiliary air inlet area and separation of oil fumes in the box.

[0015] Preferably, the diversion section is inclined towards the main air intake end of the fan system of the range hood from the air intake direction of the range hood's air inlet.

[0016] In this solution, the above settings are designed to meet the circumferential asymmetry of the fan system's air intake, satisfy the fluid flow law, and avoid the situation where the fan system captures oil fumes and some oil fumes are blocked by the diversion section when the air intake direction of the diversion section is the same as that of the air inlet, thus increasing the resistance of the fan system in capturing oil fumes.

[0017] Preferably, the two diversion sections are tilted in the same direction.

[0018] In this solution, the above-mentioned setup can further reduce the resistance to oil fume collection in the fan system compared to having the two diversion sections tilted in opposite directions.

[0019] Preferably, the angle between the two diversion sections and the air inlet of the range hood is in the range of 10-40°.

[0020] In this solution, by limiting the tilt angle of the diversion section, we can prevent the diversion section from tilting too much or too little, thus ensuring the diversion section's effectiveness in guiding the oil fumes.

[0021] Preferably, the air intake structure further includes a noise reduction section, which is disposed on the surface of the air intake section facing the fan system of the range hood.

[0022] In this solution, the above-mentioned settings are used to reduce the noise radiated outward by the fan system when collecting oil fumes.

[0023] Preferably, the noise reduction part has a plurality of noise reduction holes.

[0024] In this solution, the noise reduction holes are used to absorb noise through the above settings, thereby further reducing noise.

[0025] A downdraft range hood, the downdraft range hood including the air intake structure as described above.

[0026] In this solution, the down-mounted range hood includes the aforementioned air intake structure to improve the aerodynamic performance of the down-mounted range hood without increasing the size of the air intake. In addition, it can reduce noise during use, thereby improving the user experience.

[0027] The positive and progressive effects of this invention are as follows: By setting up a flow guide to close the excess space above the corresponding fan system and air inlet inside the housing, the range hood with this air intake structure can capture oil fumes without them flowing into the excess space above the corresponding fan system and air inlet after entering the housing. This avoids the formation of vortex zones inside the housing, thereby reducing flow separation. Under the guiding effect of the flow guide, the oil fumes can flow into the fan system more quickly. When the flow guide is used to guide the oil fumes, its own wall adhesion effect can also be used to reduce the problem of weak air intake in the upper part of the housing caused by the low position of the air inlet and vortex, thereby improving the efficiency of the fan system and thus improving the aerodynamic performance of the range hood. Attached Figure Description

[0028] Figure 1 This is a perspective view of a preferred embodiment of the down-mounted range hood of the present invention.

[0029] Figure 2 This is a diagram showing the positional relationship between the air intake structure and the housing in a preferred embodiment of the present invention.

[0030] Figure 3 This is a diagram showing the positional relationship between the flow divider and the air inlet in a preferred embodiment of the present invention.

[0031] Figure 4 This is a diagram showing the positional relationship between the air intake structure and the fan system in a preferred embodiment of the present invention.

[0032] Figure 5 This is a perspective view of the air intake structure according to a preferred embodiment of the present invention.

[0033] Figure 6 This is a schematic diagram of a preferred embodiment of the present invention, showing a diversion section that is inclined.

[0034] Explanation of reference numerals in the attached figures:

[0035] Box 1

[0036] Air inlet 11

[0037] First import 111

[0038] Second import 112

[0039] Top plate 12

[0040] Base plate 13

[0041] Drainage section 2

[0042] First paragraph, 21

[0043] Second paragraph, 22

[0044] Diversion section 3

[0045] Noise Reduction Unit 4

[0046] Noise Reduction Hole 41

[0047] Fan system 5

[0048] Main intake end 51

[0049] 52 auxiliary air intake Detailed Implementation

[0050] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0051] This embodiment provides an air intake structure, the specific structure of which is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the air intake structure is located inside the housing 1 of the range hood, and the air intake structure includes:

[0052] The air intake section 2 is disposed inside the housing 1 of the range hood and located between the fan system 5 and the air inlet 11 of the range hood. The housing 1 of the range hood includes a top plate 12, which is located above the fan system 5 and the air inlet 11 of the range hood. The opposite sides of the air intake section 2 are respectively sealed and connected to the upper edge of the air inlet 11 and the top plate 12 of the range hood, and the middle area of ​​the air intake section 2 is sealed and connected to the upper edge of the fan system 5. The air intake section 2 is used to close the space located at the air inlet 11 of the range hood and above the fan system 5 of the range hood.

[0053] Specifically, the air intake section 2 is made of sheet metal and is located inside the housing 1, which also includes a fan system 5. An air inlet 11 is provided on the housing 1 and is connected to the fan system 5. The air intake section 2 is positioned above the fan system 5 and the air inlet 11 along the height direction within the housing 1. Both ends of the air intake section 2 extend to the side panels of the housing 1, and both sides extend to the upper edge of the air inlet 11 and the top plate 12, respectively. The upper edge of the air inlet 11 is the edge of the air inlet 11 near the top plate 12, and the air intake section 2 is also sealed to the upper edge of the fan system 5 when it extends to the top plate 12. This allows the air intake section 2 to seal the space above the air inlet 11 of the range hood and the fan system 5 of the range hood. It is understandable that the sealing connection between the drainage section 2 and the top plate 12, the upper edge of the fan system 5 and the upper edge of the air inlet 11 can be achieved by welding in the prior art, or by filling the joint with sealing material, such as rubber or other sealing materials, which will not be elaborated on here.

[0054] In this embodiment, by setting the diversion section 2, the diversion section 2 occupies the space in the upper right of the housing 1 when viewed from the cross-sectional direction. That is, the space from the air inlet 11 towards the fan system 5 and located at the upper edge of the air inlet 11 and the upper edge of the fan system 5 will not accumulate oil fumes. By sealing the diversion section 2 with the upper edge of the air inlet 11, the upper edge of the fan system 5 and the top plate 12, when the range hood with this air intake structure captures oil fumes, the oil fumes do not need to flow into the extra space above the fan system 5 and the air inlet 11 in the housing 1 after entering the housing 1, thus avoiding the formation of a vortex zone in this area of ​​the housing 1 and reducing flow separation.

[0055] In addition, the fumes can flow into the fan system 5 faster under the guidance of the diversion part 2. When the fumes are guided by the diversion part 2, its own wall adhesion effect can also be used to reduce the problem of weak air intake in the upper area of ​​the space above the fan system 5 and the air inlet 11 caused by the low position of the air inlet 11 and the vortex, thereby improving the efficiency of the fan system 5 and thus improving the aerodynamic performance of the range hood.

[0056] In this embodiment, the cross-section of the drainage section 2 includes a first segment 21 and a second segment 22, wherein the first segment 21 is arc-shaped and protrudes toward the fan system 5 of the range hood, and the second segment 22 is straight.

[0057] Specifically, the cross-section of the drainage section 2 is C-shaped. The first segment 21 is located between the upper edge of the air inlet 11 and the upper edge of the fan system 5, and the second segment 22 is located between the upper edge of the fan system 5 and the top plate 12. To ensure the flow efficiency of the fumes flowing in from the air inlet 11, the cross-section of the first segment 21 is set as an arc shape. Compared with a straight line, this makes the flow of fumes flowing into the fan system 5 smoother and more stable, suppressing flow separation. The second segment 22 is set as a straight line, extending from the upper edge of the fan system 5 to the top plate 12. Compared with an arc shape, the second segment 22 does not require a protrusion and does not extend further towards the fan system 5, thus reducing space occupation, avoiding the fan system 5, and rationally allocating the internal space of the housing 1. This prevents the drainage section 2 from occupying too much space in the housing 1, which would force the volume of the fan system 5 to shrink and deteriorate its aerodynamic performance.

[0058] In this embodiment, the first segment 21 is located between the upper edge of the air inlet 11 of the range hood and the upper edge of the fan system 5 of the range hood, and is tangent to the air inlet direction of the air inlet 11.

[0059] Specifically, the first section 21 extends from the upper edge of the air inlet 11. The first section 21 is tangent to the flow direction of the oil fumes flowing in from the air inlet 11. Compared with the first section 21 being inclined to the flow direction of the oil fumes flowing in from the air inlet 11, the oil fumes can flow directly to the fan system 5 through the guide section 2, reducing the flow path of the oil fumes, thereby reducing the flow separation at the air inlet 11 and allowing the airflow to be smoothly drawn into the fan system 5.

[0060] In this embodiment, the casing 1 of the range hood also includes a bottom plate 13, and the air intake structure also includes a diversion section 3. The diversion section 3 extends from the intake section 2 to the bottom plate 13. There are two diversion sections 3. The two diversion sections 3 are located on opposite sides of the main air intake end 51 of the fan system 5 of the range hood. The air inlet 11 of the range hood is separated by the two diversion sections 3 to form a first inlet 111 and a second inlet 112 that are respectively connected to the main air intake end 51 and the auxiliary air intake end 52 of the fan system 5 of the range hood.

[0061] Specifically, the diversion section 3 is located between the air inlet 11 and the fan system 5. The diversion section 3 is a flat plate and there are two of them. The two diversion sections 3 are located on opposite sides of the main air inlet 51 of the fan system 5. The guide section 2 is located above the diversion section 3. The diversion section 3 and the guide section 2 are connected and together form a sealing structure. When the oil fumes flow into the main air inlet 51 of the fan system 5 through the air inlet 11, the diversion section 3 and the guide section 2 isolate the oil fumes in all directions of the main air inlet 51, so that the oil fumes will not generate a vortex area in the box 1 and can directly enter the fan system 5. At the same time, it avoids the oil fumes that originally need to flow into the main air inlet 51 being attracted by the auxiliary air inlet 52, that is, it avoids the main air inlet 51 and the auxiliary air inlet 52 competing for the oil fume flow and reduces the flow and separation of oil fumes in the box 1.

[0062] Understandably, the bottom of the fan system 5 abuts against the bottom plate 13 of the housing 1. The diversion sections 3 located on opposite sides of the main air intake 51 divide the air inlet 11 into a first inlet 111 and a second inlet 112. The first inlet 111 is connected to the main air intake 51, and the second inlet 112 is located on opposite sides of the first inlet 111 and is connected to the auxiliary air intake 52 through the gap between the side of the fan system 5 and the inner wall of the housing 1. The first inlet 111 and the second inlet 112 are independent of each other. Thus, when capturing oil fumes, the main air intake 51 and the auxiliary air intake 52 of the fan system 5 can each share the oil fume flow, without competing for flow within the housing 1, avoiding poor air intake in the auxiliary air intake area and separation of oil fumes within the housing 1.

[0063] In this embodiment, the diversion section 3 is inclined from the air inlet 11 of the range hood toward the main air inlet 51 of the fan system 5 of the range hood.

[0064] Specifically, the air inlet 11 is oriented in a straight line towards the main air intake end 51, while the diverter 3 is inclined in the same direction, and also inclined towards the smaller intake section of the fan system 5's volute. This is because the main circumferential air intake area of ​​the fan system 5 is generally from the bottom of the volute to the outlet section, rather than along the axis of the volute; this is existing technology and will not be elaborated further here. Therefore, the inclined arrangement of the two diverter sections 3 allows the fumes passing through them to enter the main air intake area promptly, conforming to the fluid flow law of circumferential asymmetry in air intake. This avoids the situation where, when the extension direction of the diverter section 3 is the same as the air inlet 11, some fumes are captured by the fan system 5 and flow into the fan system 5 along the air inlet 11, but are obstructed by the diverter section 3 due to the asymmetric flow characteristics, thus increasing the resistance of the fan system 5 in capturing fumes.

[0065] In this embodiment, the two diversion sections 3 are tilted in the same direction. Compared to two diversion sections 3 having opposite tilt directions, having the two diversion sections 3 tilted in the same direction can further reduce the resistance to oil fume collection in the fan system 5.

[0066] In this embodiment, the angle between the two diversion sections 3 and the air inlet 11 of the range hood is in the range of 10-40°. By limiting the tilt angle of the diversion section 3, excessive or insufficient tilt is avoided, ensuring the diversion section 3's effective guidance of the fumes.

[0067] In this embodiment, the air intake structure also includes a noise reduction part 4, which is disposed on the surface of the air intake part 2 facing the fan system 5 of the range hood.

[0068] Specifically, the noise reduction part 4 is noise reduction cotton. The noise reduction part 4 is attached to the surface of the air intake part 2 facing the fan system 5 of the range hood. The noise reduction cotton itself absorbs the noise radiated from the fan system 5 to the air inlet 11 to improve the noise reduction effect.

[0069] Furthermore, in this embodiment, the noise reduction unit 4 is provided with a plurality of noise reduction holes 41. The size of the noise reduction holes 41 can be the aperture used in the prior art for absorbing noise, which will not be described in detail here. It is understood that the openings of the noise reduction holes 41 face the fan system 5, and by setting the noise reduction holes 41 to absorb noise, the noise reduction effect of the air intake structure is further improved.

[0070] This embodiment also provides a downdraft range hood, which includes the above-mentioned air intake structure to improve the aerodynamic performance of the downdraft range hood without increasing the size of the air inlet 11. In addition, it can also reduce the noise during use, thereby improving the user experience.

[0071] Furthermore, the down-mounted range hood in this embodiment can also be controlled by a voice module. The panel of the down-mounted range hood can be equipped with a controller, a voice receiving module, and a voice parsing module, which are based on existing technologies. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller starts or stops the down-mounted range hood accordingly, thereby realizing intelligent control of the down-mounted range hood and improving the user experience.

[0072] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention 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 the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. An air intake structure, characterized in that, The air intake structure is disposed inside the range hood housing, and the air intake structure includes: A drainage section is disposed within the casing of the range hood and located between the fan system and the air inlet of the range hood. The casing of the range hood includes a top plate located above the fan system and the air inlet. The opposite sides of the drainage section are respectively sealed to the upper edge of the air inlet and the top plate, and the middle area of ​​the drainage section is sealed to the upper edge of the fan system. The drainage section is used to seal the space located at the air inlet and above the fan system of the range hood.

2. The intake structure as described in claim 1, characterized in that, The cross-section of the drainage section includes a first section and a second section, wherein the first section is arc-shaped and protrudes toward the fan system of the range hood, and the second section is straight.

3. The intake structure as described in claim 2, characterized in that, The first segment is located between the upper edge of the air inlet of the range hood and the upper edge of the fan system of the range hood, and is tangent to the air inlet direction.

4. The intake structure as described in claim 1, characterized in that, The range hood housing also includes a base plate, and the air intake structure also includes a diversion section. The diversion section extends from the intake section to the base plate. There are two diversion sections, which are located on opposite sides of the main air intake end of the range hood's fan system. The air inlet of the range hood is divided by the two diversion sections to form a first inlet and a second inlet that are respectively connected to the main air intake end and the auxiliary air intake end of the range hood's fan system.

5. The intake structure as described in claim 4, characterized in that, The diversion section is inclined towards the main air intake end of the range hood's fan system from the air inlet of the range hood.

6. The intake structure as described in claim 5, characterized in that, The two diversion sections are tilted in the same direction.

7. The intake structure as described in claim 6, characterized in that, The angle between the two diversion sections and the air inlet of the range hood ranges from 10° to 40°.

8. The intake structure as described in claim 1, characterized in that, The air intake structure also includes a noise reduction section, which is disposed on the surface of the air intake section facing the fan system of the range hood.

9. The intake structure as described in claim 8, characterized in that, The noise reduction part has several noise reduction holes.

10. A down-mounted range hood, characterized in that, The down-mounted range hood includes the air intake structure as described in any one of claims 1-9.

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