Flow guide air inlet net and range hood comprising same

Abstract

The utility model provides a diversion air inlet net and a range hood including the same, the diversion air inlet net comprises a main body and a plurality of diversion plates in sequence along the air inlet direction, the main body comprises a frame and a grid, the diversion plates are arranged at the top of the grid, and the diversion plates are obliquely arranged relative to the side surface of the grid; the flow guide plate comprises a bottom face facing inlet air flow and a top face opposite to the bottom face. The cross section, perpendicular to the width direction of the main body, of the flow guide plate comprises a first arc connected with the top of the grating and a second arc externally tangent to the first arc on the bottom face. The cross section, perpendicular to the width direction of the main body, of the flow guide plate comprises a third arc connected with the top of the grid and a fourth arc externally tangent to the third arc on the top face. According to the guide air inlet net and the range hood comprising the guide air inlet net, the guide plate with the structure is adopted, and the bottom surface and / or the top surface of the guide plate are / is formed by combining the two sections of tangent arcs, so that the area of oil fume in contact with the filter net is increased, oil drops in the oil fume are fully condensed, and the oil fume separation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and particularly relates to a diversion air inlet net and a range hood including the same. Background Art

[0002] The air inlet net of the traditional range hood is arranged at the bottom air inlet. When the cooking fume enters the interior of the range hood, part of the cooking fume will condense on the surface of the air inlet net, and the grease in the cooking fume is separated. However, generally, in order to avoid affecting the air intake volume, the air inlet net is generally provided with more gaps. Therefore, there must be a lot of cooking fume that cannot be separated from grease, and the oil stain is easily accumulated at the volute, the impeller and the air outlet cover, which easily leads to the decline of the performance of the fan system, and the problem of oil accumulation and even dripping at the air outlet cover. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the defects of insufficient condensation of cooking fume and low separation efficiency of cooking fume in the existing range hood, and to provide a diversion air inlet net and a range hood including the same.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A diversion air inlet net is installed at the air inlet of the fan of the range hood. The diversion air inlet net sequentially includes a main body and a plurality of diversion plates along the air inlet direction. The main body includes a frame and a plurality of gratings arranged within the frame and spaced along the length direction of the main body. The diversion plates are arranged at the top of the gratings along the air inlet direction, and the diversion plates are inclined relative to the side surfaces of the gratings. The diversion plates include a bottom surface facing the incoming air flow and a top surface opposite to the bottom surface.

[0006] The cross-section of the diversion plate perpendicular to the width direction of the main body includes a first arc connected to the top of the grating and a second arc externally tangent to the first arc on the bottom surface.

[0007] And / or, the cross-section of the diversion plate perpendicular to the width direction of the main body includes a third arc connected to the top of the grating and a fourth arc externally tangent to the third arc on the top surface.

[0008] In this solution, through the diversion plates with the above structure, the bottom surface and / or the top surface of the diversion plate are composed of two tangent arcs, which increases the contact area of the cooking fume with the filter screen, enables the oil droplets in the cooking fume to be fully condensed, and thus improves the efficiency of separating the cooking fume.

[0009] Preferably, the deflector includes the first arc and the second arc on the bottom surface, and the deflector includes the third arc and the fourth arc on the top surface. The radii of the first arc, the second arc, the third arc, and the fourth arc are all equal.

[0010] In this solution, the two tangent arcs on the bottom surface and the top surface of the deflector adopt equal radii, making the deflector have a regular shape, easy to process, and the condensation of oil fume on the surface of the reverse flow plate is uniform.

[0011] Preferably, each grille includes a first oil collecting groove, and the first oil collecting groove is arranged below the bottom surface;

[0012] The frame is provided with a second oil collecting groove surrounding the frame and at least one oil outlet. The first oil collecting groove is communicated with the second oil collecting groove, and the oil outlet is arranged in the second oil collecting groove.

[0013] In this solution, arranging the first oil collecting groove below the bottom surface facilitates the accumulated oil to flow into the first oil collecting groove along the bottom surface of the reverse flow plate. The deflector air inlet net is communicated with the above-mentioned first oil collecting groove and the second oil collecting groove to collect the condensed accumulated oil, making the deflector air inlet net replace the function of the oil leakage groove and facilitating oil collection.

[0014] Preferably, several of the deflectors are divided into a first group of deflectors and a second group of deflectors,

[0015] The first group of deflectors and the second group of deflectors include an equal or unequal number of the deflectors. The first group of deflectors is used to deflect the fluid flowing through the main air inlet of the fan, and the second group of deflectors is used to deflect the fluid flowing through the auxiliary air inlet of the fan.

[0016] In this solution, the fluid of the main air inlet and the auxiliary air inlet is deflected by two groups of deflectors respectively, improving the deflection efficiency.

[0017] Preferably, the deflectors of the first group of deflectors and the deflectors of the second group of deflectors are symmetrical to each other.

[0018] In this solution, two groups of deflectors with a symmetrical structure are adopted, which is convenient for processing and manufacturing.

[0019] Preferably, the main body is provided with a third oil collecting groove between the first group of deflectors and the second group of deflectors. The third oil collecting groove is communicated with the second oil collecting groove, and the third oil collecting groove is used to be arranged below the oil leakage hole of the fan.

[0020] In this solution, by arranging the third oil collecting groove below the oil leakage hole, it is convenient to collect the accumulated oil of the fan and improve the efficiency of collecting the accumulated oil.

[0021] Preferably, the spacing between adjacent ones of the grilles is a first spacing.

[0022] The width of the deflector along the length direction is less than the first spacing and greater than half of the first spacing; and / or, the height of the deflector is greater than the first spacing and less than twice the first spacing.

[0023] In this solution, with the width of the deflector arranged as above, it ensures that the deflector has sufficient surface area for condensation, improving the efficiency of oil fume separation. With the height of the deflector arranged as above, it will neither be too high to affect the air intake and increase the flow resistance, nor be too low to reduce the condensation area of the deflector, ensuring sufficient condensation.

[0024] Preferably, the middle part of the deflector air inlet grid or the grille along the width direction is higher than both ends of the grille along the width direction.

[0025] In this solution, with the deflector air inlet grid or the grille arranged with the above height, the accumulated oil automatically converges from the high to the low point, improving the convergence efficiency.

[0026] An oil fume extractor, the oil fume extractor includes the deflector air inlet grid as described above.

[0027] In this solution, through the above deflector air inlet grid, the oil fume extractor increases the area of the oil fume contacting the filter screen, enabling the oil droplets in the oil fume to be fully condensed, thereby improving the efficiency of separating the oil fume.

[0028] Preferably, the oil fume extractor further includes an oil filter screen, the oil filter screen is arranged at the flue gas inlet of the oil fume extractor, and the deflector air inlet grid is arranged above the oil filter screen along the air inlet direction.

[0029] In this solution, through the oil filter screen and the deflector air inlet grid arranged as above, the oil fume extractor achieves double high - efficiency filtering of the oil fume, improving the efficiency of separating the oil fume.

[0030] The positive and progressive effect of the present utility model is that: through the deflector of the above structure in the deflector air inlet grid and the oil fume extractor including it, the bottom surface and / or the top surface of the deflector is composed of two tangent arcs, increasing the area of the oil fume contacting the filter screen, enabling the oil droplets in the oil fume to be fully condensed, thereby improving the efficiency of separating the oil fume. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the oil fume extractor according to the embodiment of the present utility model.

[0032] Figure 2 It is a schematic structural diagram of the deflector air inlet grid according to the embodiment of the present utility model.

[0033] Figure 3This is the front view of the diversion air inlet net of the embodiment of the present utility model.

[0034] Figure 4 This is the structural schematic diagram of the diversion plate of the embodiment of the present utility model.

[0035] Figure 5 This is the partial structural schematic diagram of the diversion air inlet net of the embodiment of the present utility model.

[0036] Explanation of reference numerals:

[0037] Diversion air inlet net 1

[0038] Main body 2

[0039] Frame 21

[0040] Grille 22

[0041] Diversion plate 3

[0042] Bottom surface 31

[0043] First arc 310

[0044] Second arc 311

[0045] Top surface 32

[0046] Third arc 320

[0047] Fourth arc 321

[0048] First oil sump 4

[0049] Second oil sump 5

[0050] Third oil sump 6

[0051] First group of diversion plates 7

[0052] Second group of diversion plates 8

[0053] First spacing a

[0054] Width b of the diversion plate

[0055] Height c of the diversion plate

[0056] Fan 9

[0057] Main air inlet 91

[0058] Auxiliary air inlet 92

[0059] Oil filter net 93

[0060] Length direction A of the main body Detailed implementation manners

[0061] The following is a preferred embodiment, which will be described more clearly and completely in conjunction with the accompanying drawings to illustrate the present utility model.

[0062] As Figures 1-5 shown, this embodiment provides a diversion air inlet net 1, which is installed at the air inlet of the fan 9 of the range hood. The diversion air inlet net 1 sequentially includes a main body 2 and a plurality of diversion plates 3 along the air inlet direction. The main body 2 includes a frame 21 and a plurality of grilles 22 arranged within the frame 21 and spaced along the length direction of the main body 2. The diversion plates 3 are arranged at the top of the grilles 22 along the air inlet direction, and the diversion plates 3 are inclined relative to the side surfaces of the grilles 22. The diversion plates 3 include a bottom surface 31 facing the incoming air flow and a top surface 32 opposite to the bottom surface 31.

[0063] The cross-section of the diversion plate 3 perpendicular to the width direction of the main body 2 includes a first arc 310 connected to the top of the grille 22 and a second arc 311 externally tangent to the first arc 310 on the bottom surface 31; and / or, the cross-section of the diversion plate 3 perpendicular to the width direction of the main body 2 includes a third arc 320 connected to the top of the grille 22 and a fourth arc 321 externally tangent to the third arc 320 on the top surface 32.

[0064] In this embodiment, the upper and lower surfaces (i.e., the top surface 32 and the bottom surface 31) of the diversion plate 3 are both curved surfaces with two externally tangent arcs, which is beneficial to a smoother diversion effect. In other embodiments, according to needs, only one surface (i.e., the bottom surface 31 or the top surface 32) can adopt this curved surface with two externally tangent arcs, and the other surface can be a relatively flat surface.

[0065] The diversion air inlet net 1 through the diversion plate 3 with the above structure, the bottom surface 31 and / or the top surface 32 of the diversion plate 3 are composed of two tangent arcs, which increases the area of the oil fume contacting the filter net, enables the oil droplets in the oil fume to be fully condensed, and thus improves the efficiency of separating the oil fume.

[0066] In this embodiment, as Figure 4 shown, the radii of the first arc 310, the second arc 311, the third arc 320 and the fourth arc 321 of the diversion plate 3 are all equal, making the shape of the diversion plate 3 regular, easy to process, and the condensation of the oil fume on the surface of the reverse flow plate uniform.

[0067] Among them, as Figures 2-4 shown, each grille 22 includes a first oil collecting groove 4, and the first oil collecting groove 4 is arranged below the bottom surface 31; the frame 21 is provided with a second oil collecting groove 5 surrounding the frame 21 and at least one oil outlet. The first oil collecting groove 4 is communicated with the second oil collecting groove 5, and the oil outlet is arranged in the second oil collecting groove 5.

[0068] The first oil sump 4 is arranged below the bottom surface 31, facilitating the accumulated oil to flow into the first oil sump 4 along the bottom surface 31 of the backflow plate. The diversion air inlet net 1 is communicated with the first oil sump 4 and the second oil sump 5 arranged above, collecting the condensed accumulated oil, so that the diversion air inlet net 1 replaces the function of the oil leakage tank, facilitating oil collection.

[0069] Among them, as Figure 1 and Figure 3 shown, several diversion plates 3 are divided into a first group of diversion plates 7 and a second group of diversion plates 8. The first group of diversion plates 7 and the second group of diversion plates 8 include an equal or unequal number of diversion plates 3. The first group of diversion plates 7 is used to divert the fluid flowing through the main air inlet 91 of the fan 9, and the second group of diversion plates 8 is used to divert the fluid flowing through the auxiliary air inlet 92 of the fan 9. By diverting the fluid of the main air inlet 91 and the auxiliary air inlet 92 respectively through the two groups of diversion plates 3, the diversion efficiency is improved.

[0070] Among them, the diversion plates 3 of the first group of diversion plates 7 and the diversion plates 3 of the second group of diversion plates 8 are symmetrical to each other. Using two groups of diversion plates 3 with a symmetrical structure is convenient for processing and manufacturing.

[0071] Among them, as Figure 1 and Figure 3 shown, the main body 2 is provided with a third oil sump 6 between the first group of diversion plates 7 and the second group of diversion plates 8. The third oil sump 6 is communicated with the second oil sump 5, and the third oil sump 6 is arranged below the oil leakage hole of the fan 9. By arranging the third oil sump 6 below the oil leakage hole, it is convenient to collect the accumulated oil of the fan 9 and improve the efficiency of collecting the accumulated oil.

[0072] As Figure 5 shown, the distance between adjacent grilles 22 is the first distance a. The width b of the diversion plate 3 along the length direction is less than the first distance and greater than half of the first distance, that is, 0.5a < b < a. The height c of the diversion plate is greater than the first distance and less than 2 times the first distance, a < c < 2a. With the width of the diversion plate 3 set as above, it is ensured that the diversion plate 3 has enough surface area for condensation, improving the efficiency of oil fume separation. With the height of the diversion plate 3 set as above, it will neither be too high to affect air intake and increase the flow resistance, nor be too low to reduce the condensation area of the diversion plate 3, ensuring sufficient condensation.

[0073] As Figure 2 , the middle part of the diversion air inlet net 1 along the width direction is higher than both ends of the grille 22 along the width direction, and the diversion air inlet net 1 is an arc-shaped structure as a whole. With the height of the diversion air inlet net 1 set as above, the accumulated oil automatically converges from the high point to the low point, improving the convergence efficiency.

[0074] In other embodiments, the diversion air inlet net 1 does not necessarily need to have a complete arc structure. As long as the middle part of the diversion air inlet net 1 in the width direction is higher than the two ends of the grille 22 in the width direction, it is convenient for oil collection. For example, only the height of the middle part of the grille 22 is higher than its two ends, and the frame 21 can be adjusted accordingly according to the structural cooperation requirements.

[0075] This embodiment also provides a range hood, which includes the diversion air inlet net 1 as described above. Through the above-mentioned diversion air inlet net 1, the range hood increases the area of the oil fume contacting the filter screen, enables the oil droplets in the oil fume to be fully condensed, and thus improves the efficiency of separating the oil fume.

[0076] Among them, as Figure 1 shown, the range hood further includes an oil filter screen 93. The oil filter screen 93 is arranged at the flue gas inlet of the range hood, and the diversion air inlet net 1 is arranged above the oil filter screen 93 along the air inlet direction. Through the above-mentioned oil filter screen and diversion air inlet net 1, the range hood realizes double high-efficiency filtering of the oil fume and improves the efficiency of separating the oil fume.

[0077] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only an example. The protection scope of the present invention is defined by the appended claims. Without departing from the principle and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A guide air inlet net, installed at the air inlet of a fan of a range hood, the guide air inlet net comprises a main body and a plurality of guide plates in sequence along the air inlet direction, the main body comprises a frame and a plurality of grilles arranged within the frame and spaced apart along the length direction of the main body, the guide plates are arranged at the top of the grilles along the air inlet direction, and the guide plates are arranged obliquely relative to the side surfaces of the grilles, the guide plates comprise a bottom surface facing the air inlet flow and a top surface opposite to the bottom surface, and are characterized in that: The cross section of the guide plate perpendicular to the width direction of the main body includes, on the bottom surface, a first arc connected to the top of the grille and a second arc circumscribed to the first arc; And / or, a cross section of the guide plate perpendicular to the width direction of the main body includes, on the top surface, a third arc connected to the top of the grille and a fourth arc circumscribed to the third arc.

2. The air guide and inlet net according to claim 1, characterized in that: The guide plate includes the first arc and the second arc on the bottom surface, and the guide plate includes the third arc and the fourth arc on the top surface. The radii of the first arc, the second arc, the third arc and the fourth arc are all equal.

3. The air inlet guide net according to claim 1, characterized in that: Each of the grilles includes a first oil collecting trough, and the first oil collecting trough is arranged below the bottom surface; The frame is provided with a second oil collecting groove surrounding the frame and at least one oil outlet, the first oil collecting groove is communicated with the second oil collecting groove, and the oil outlet is arranged in the second oil collecting groove.

4. The air guide and air inlet net according to claim 3, characterized in that: The guide plates are divided into a first group of guide plates and a second group of guide plates. The first group of guide plates and the second group of guide plates include equal or unequal numbers of guide plates. The first group of guide plates is used to guide the fluid flowing through the main air inlet of the fan, and the second group of guide plates is used to guide the fluid flowing through the auxiliary air inlet of the fan.

5. The air guide and inlet net according to claim 4, characterized in that: The guide plates of the first group of guide plates and the guide plates of the second group of guide plates are symmetrical to each other.

6. The air guide and air inlet net according to claim 4, characterized in that: The main body is provided with a third oil collecting groove between the first group of guide plates and the second group of guide plates. The third oil collecting groove is connected to the second oil collecting groove. The third oil collecting groove is used to be arranged below the oil leakage hole of the fan.

7. The air inlet guide net according to claim 1, characterized in that: The spacing between adjacent grids is a first spacing, The width of the guide plate along the length direction is smaller than the first spacing and larger than half of the first spacing; And / or, the height of the guide plate is greater than the first spacing and less than 2 times of the first spacing.

8. The air guide and inlet net according to any one of claims 1 to 7, characterized in that: A middle portion of the air inlet guide net or the grille along the width direction is higher than both ends of the grille along the width direction.

9. A range hood, characterized in that: The range hood comprises an air inlet guide net as claimed in any one of claims 1 to 8.

10. The range hood according to claim 9, characterized in that: The range hood further comprises an oil filter, which is arranged at the smoke inlet of the range hood, and the air inlet guide net is arranged above the oil filter along the air inlet direction.

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