CN107191987B - Oil screen for range hood and side-draft range hood applying same - Google Patents
Oil screen for range hood and side-draft range hood applying same Download PDFInfo
- Publication number
- CN107191987B CN107191987B CN201710057672.XA CN201710057672A CN107191987B CN 107191987 B CN107191987 B CN 107191987B CN 201710057672 A CN201710057672 A CN 201710057672A CN 107191987 B CN107191987 B CN 107191987B
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- frame
- flanging
- vent hole
- oil screen
- range hood
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2035—Arrangement or mounting of filters
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
Abstract
The invention discloses an oil screen for a range hood, which comprises a frame and vent holes arranged in the frame, wherein each vent hole is arranged along the width direction of the frame, the vent holes are arranged in parallel at intervals in the length direction of the frame, the frame is provided with a first end and a second end in the length direction, and the oil screen is characterized in that: the air vents comprise at least two first air vents and at least two second air vents, each first air vent is arranged between the middle and the first end of the frame, and the air inlet area of a single first air vent is gradually increased from the middle to the first end of the frame; each second vent hole is arranged between the middle and the second end of the frame, and the air inlet area of each second vent hole is gradually increased from the middle to the second end of the frame. The air inlet area of the oil screen is gradually increased from the middle to the two sides, the negative pressure distribution in front of the oil screen is adjusted, the negative pressure extends to the two ends, and therefore the oil smoke absorption effect is improved.
Description
Technical Field
The invention relates to an oil screen and a side-draft range hood applying the oil screen.
Background
With the improvement of living standard and the improvement of living quality requirement, the range hood is widely applied to various families as an important electrical appliance for completely sucking and cooking oil fume in a household kitchen. The main problem that exists at present is that, when the range hood works, a large amount of greasy dirt is easily accumulated in the air flue through the oil smoke in the air flue, and because the formed greasy dirt has high viscosity, the oil smoke is difficult to be discharged from the air outlet of the air flue, so that the corrosion of the greasy dirt to a pipeline is caused, the service life of the range hood is reduced, the use and maintenance cost of the range hood is simultaneously improved, the other part of the oil smoke is directly discharged, and a large amount of carcinogens and substances with particles larger than pm2.5 contained in the oil smoke have great influence on the environment.
In order to solve the problem, the current common practice is to set up the oil screen at the air intake of range hood, chinese patent as application No. 201520140308.6 discloses a side-suction range hood, it includes the smoke guide plate, smoke collection chamber and two-layer at least filter screen, the filter screen is located the smoke collection intracavity with the detachable mode, the filter screen is located the rear side of smoke guide plate and is parallel with the smoke guide plate, be equipped with a plurality of ventilation holes on the filter screen, the ventilation hole on the adjacent two-layer filter screen is staggered, the peripheral shaping of every ventilation hole has the turn-ups, all turn-ups all face the rear side in smoke collection chamber, can ensure that oil drips can not directly drip down the kitchen face after the oil smoke separation. Because the oil screens are uniformly distributed, most of the air flow passes through the middle part close to the air inlet, the negative pressure in the middle part is higher, and the negative pressures on the two sides are lower; the kitchen range is usually distributed right below two sides of the oil screen, and generated oil smoke is in an area with lower negative pressure, so that the oil smoke is not beneficial to absorption.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide an oil screen for a range hood, which improves the oil smoke absorption effect, in view of the problems existing in the prior art.
The second technical problem to be solved by the invention is to provide a side-draft range hood applying the oil screen.
The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides an oil net for range hood, includes the frame and sets up the ventilation hole in the frame, and every ventilation hole sets up along the width direction of frame to each ventilation hole is arranged at interval side by side on the length direction of frame, the frame has first end and second end, its characterized in that on length direction: the air vents comprise at least two first air vents and at least two second air vents, each first air vent is arranged between the middle and the first end of the frame, and the air inlet area of a single first air vent is gradually increased from the middle to the first end of the frame; each second vent hole is arranged between the middle and the second end of the frame, and the air inlet area of each second vent hole is gradually increased from the middle to the second end of the frame.
According to the invention, the air inlet area is preferably adjusted through the width change of the vent holes, and the width a1 of the single first vent hole is gradually increased from the middle to the first end of the frame; the width a2 of the single second vent hole gradually increases from the middle to the second end of the bezel.
Preferably, the value ranges of a1 and a2 are both 8-20 mm, and the air inlet area of the middle part of the oil screen is reduced under the condition of ensuring the same integral air inlet area, so that the noise is concentrated, namely, the chance that the noise of the middle part of the oil screen is transmitted from the front is reduced, and the noise reduction effect is achieved.
Preferably, in order to arrange a flow field between the oil screen and the fan when oil fume flows through the vent holes, a first flanging and a second flanging are respectively extended from the back of the frame on two sides of each first vent hole in the length direction of the frame, the first flanging is positioned on one side of the first vent hole close to the middle of the frame, the second flanging is positioned on the other side of the first vent hole far from the middle of the frame, and the first flanging is connected with the second flanging of the adjacent first vent hole on the front side of the frame; a third flanging and a fourth flanging are respectively extended from the two sides of each second vent hole in the length direction of the frame to the back of the frame, the third flanging is positioned at one side of the second vent hole close to the middle of the frame, the fourth flanging is positioned at the other side of the second vent hole far away from the middle of the frame, the third flanging and the fourth flanging of the adjacent second vent hole are connected at the front of the frame, and the first flanging of the adjacent first vent hole positioned in the middle and the third flanging of the second vent hole are connected at the front of the frame; the distance between the first flanging and the tail end of the second flanging of each first vent hole on the back side of the frame is the width a1 of the first vent hole; and the distance between the third flanging and the fourth flanging of each second vent hole at the tail end of the back face of the frame is the width a2 of the second vent hole.
When making oil smoke gas stream pass through the ventilation hole, the oil smoke reduces the formation of vortex with the air intake of certain preswirl angle direction fan, improves the air inlet of fan to be favorable to the absorption of oil smoke, the second turn-ups extends towards the first turn-ups slope gradually of same first ventilation hole, the third turn-ups of fourth turn-ups towards same second ventilation hole slope gradually extends.
The second flanging and the fourth flanging preferably form an inclination angle alpha relative to the plane where the frame is located, the value range of the inclination angle alpha is 30-60 degrees, the over-flow area is too small when the inclination angle is too small, the performance of the fan is affected, and the inclination angle is too large and cannot play a direct guiding role.
Preferably, the height of the second flanging and the height of the fourth flanging are both c, the value range of the height c is 5-12 mm, the heights of the two flanging are enough, so that an effective guiding effect can be achieved, otherwise, the guiding effect is insufficient, and the one-step forming of the metal plate die cannot be achieved due to the overlarge height.
Preferably, the distance between the tail ends of the first flanging of each first ventilation hole and the second flanging of the adjacent first ventilation hole is d1, the distance between the tail ends of the backs of the third flanging of each second ventilation hole and the fourth flanging of the adjacent second ventilation hole is d2, the value ranges of d1 and d2 are 10-15 mm, the distance and the width of the ventilation holes jointly influence the ventilation area of the oil screen, the appearance of the oil screen is influenced, and the range can guarantee reasonable ventilation area and good attractiveness.
The technical solution adopted by the present invention to solve the second technical problem is as follows: the side-suction range hood comprises a smoke collecting hood, a fan cover and a fan, wherein the smoke collecting hood is arranged below the fan cover, the fan is arranged in the fan cover, part of the fan is positioned on the back side of the smoke collecting hood, and the oil net is arranged on the front side of the smoke collecting hood.
Preferably, the fan has an air inlet, the diameter of the air inlet is D, the distance between the air inlet of the fan and the center of the oil screen is S, and the above parameters satisfy the following relationship: s is less than 0.25D, so that the phenomenon that the air inlet of the fan is seriously influenced due to the fact that the oil screen is too close to the air inlet of the fan is avoided, the performance of the fan is reduced, a certain distance is ensured, and the influence of the middle part of the oil screen on the air inlet of the fan is small.
Compared with the prior art, the invention has the advantages that: the air inlet area of the oil screen is gradually increased from the middle to the two sides, so that the distribution of negative pressure in front of the oil screen is adjusted, the negative pressure extends to the two ends, and the oil smoke absorption effect is improved; in addition, under the condition of guaranteeing the same whole air inlet area, the air inlet area of the oil screen middle part is reduced, so that the noise is concentrated, namely, the chance that the noise of the oil screen middle part is transmitted from the front is reduced, and the noise reduction effect is achieved.
Drawings
Fig. 1 is a schematic structural diagram of a range hood according to the present invention;
FIG. 2 is a side sectional view of the range hood of the present invention;
FIG. 3 isbase:Sub>A sectional view taken along line A-A of the range hood of FIG. 2;
FIG. 4 is a schematic front view of an oil screen of the range hood of the present invention;
FIG. 5 is a schematic view of the back side of the oil screen of the range hood of the present invention;
FIG. 6 is a cross-sectional view of the oil screen and the fan inlet of the range hood of the present invention;
fig. 7 is a partially enlarged schematic view of a cross-sectional view of the oil screen of fig. 6.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Referring to fig. 1 to 5, the side-draft range hood includes a fume collecting hood 1, a fan hood 2 and a fan 3, the fume collecting hood 1 is installed below the fan hood 2, and the fan 3 is installed in the fan hood 2 and partially located on the back side of the fume collecting hood 1.
The front of the smoke collecting cover 1 is provided with a panel, which comprises an upper panel 41 and a lower panel 42, an oil screen 5 is arranged between the upper panel 41 and the lower panel 42, and the fan 3 is provided with an air inlet 31 towards one side of the oil screen 5. A rotatable smoke baffle 6 is arranged above the oil screen 5. In the starting state of the range hood, the smoke baffle 6 is turned upwards to expose the oil screen 5, and in the stopping state, the smoke baffle 6 is turned downwards to cover the oil screen 5.
The center of oil net 5 corresponds with the center of air intake 31 of fan 3, and oil net 5 includes frame 51 and sets up the ventilation hole in frame 51, and frame 51 can be the flat of rectangular shape, has the hem 513 of extending towards the frame 51 back (towards the one side of air intake 31 of fan 3) around frame 51, and hem 513 is used for fixing oil net 5 and collection petticoat pipe 1. The vent holes are oblong in shape, the length direction of which is perpendicular to the length direction of the frame 51, that is, each vent hole extends along the width direction of the frame 51, and the vent holes are arranged at intervals in parallel in the length direction of the frame 51.
The bezel 51 has a first end 511 and a second end 512 in the length direction. The vent holes include at least two first vent holes 521 and at least two second vent holes 522, the first vent holes 521 being disposed between the middle of the bezel 51 and the first end 511, and the second vent holes 522 being disposed between the middle of the bezel 51 and the second end 512. In the present embodiment, referring to fig. 1 and 3, the first ventilation hole 521 is located at the left side, and the second ventilation hole 522 is located at the right side.
Referring to fig. 6 and 7, the width of the first vent hole 521 is a1, and the width a1 of the first vent hole 521 gradually increases from the middle of the frame 51 to the first end 511; the width of the second ventilation hole 522 is a2, and the width a2 of the second ventilation hole 522 gradually increases from the middle of the frame 51 to the second end 512. The value range of a1 and a2 is preferably 8-20 mm. Preferably, a1 and a2 both increase uniformly from the middle to the sides. That is to say, the air inlet area of oil net 5 is crescent from the mid portion to both ends, has adjusted the preceding negative pressure distribution of oil net 5 for the negative pressure extends to both ends, thereby improves the oil absorption cigarette effect. In addition, under the condition of guaranteeing the same whole air inlet area, the air inlet area of the middle part of the oil screen 5 is reduced, so that the noise is concentrated, namely, the chance that the noise of the middle part of the oil screen 5 is transmitted from the front is reduced, and the noise reduction effect is achieved.
The first vent hole 521 extends from the first flange 5211 and the second flange 5212 to the back (the back of the frame 51, and the front of the frame 51 facing away from the air inlet 31) at two sides of the frame 51 in the length direction, that is, the two flanges both extend toward the air inlet 31. The first turned edges 5211 are located on one side of the first ventilation hole 521 near the middle of the frame 51, and the second turned edges 5212 are located on the other side of the first ventilation hole 521 far from the middle of the frame 51. The first turned-over edge 5211 extends in an arc shape, the arc shape protrudes towards a direction away from the middle of the frame 51, and the second turned-over edge 5212 gradually extends towards the first turned-over edge 5211 of the same first ventilation hole 521 in an inclined manner, i.e. the second turned-over edge 5212 inclines towards the middle of the oil screen 5 and the air inlet 31 of the fan 3. The first turned edge 5211 and the second turned edge 5212 of the adjacent first ventilation hole 521 are connected to each other on the front surface of the frame 51, and preferably, may be integrated, and the distance between the ends of the first turned edge 5211 and the second turned edge 5212 of each first ventilation hole 521 on the back surface of the frame 51 is the width a1 of the first ventilation hole 521.
The second ventilation hole 522 extends a third flange 5221 and a fourth flange 5222 from the two sides of the frame 51 in the length direction to the back (the back of the frame 51, and the front of the side of the frame 51 away from the air inlet 31), that is, the two flanges both extend toward the air inlet 31. The third flanges 5221 are located on one side of the second vent hole 522 close to the middle of the frame 51, and the fourth flanges 5222 are located on the other side of the second vent hole 522 away from the middle of the frame 51. The third turned-over edge 5221 is curved and extends in an arc shape, the arc shape protrudes towards a direction away from the middle of the frame 51, and the fourth turned-over edge 5222 gradually inclines and extends towards the third turned-over edge 5221 of the same second ventilation hole 522, that is, the fourth turned-over edge 5222 inclines towards the middle of the oil screen 5 and the air inlet 31 of the fan 3. The third turned edge 5221 and the fourth turned edge 5222 of the adjacent second vent hole 522 are connected to each other on the front surface of the bezel 51, and preferably, may be integrated, and the distance between the third turned edge 5221 and the end of the fourth turned edge 5222 of each second vent hole 522 on the back surface of the bezel 51 is the width a2 of the second vent hole 522. The first turned edge 5211 of the middle adjacent first ventilation hole 521 and the third turned edge 5221 of the second ventilation hole 522 are connected to each other on the front surface of the rim 51, and preferably, may be integrated.
Therefore, when oil smoke gas flows through the vent holes, the oil smoke can be guided to the air inlet 31 of the fan 3 at a certain pre-rotation angle, so that the flow field between the oil mesh 5 and the fan 3 is arranged, the formation of vortex is reduced, the air inlet of the fan 3 is improved, and the absorption of the oil smoke is facilitated. The first and third flanges 5211, 5221 also enhance the strength of the oil screen 5, while preventing the air flow from forming small vortices on the back of the oil screen 5. Moreover, the arrangement of the second turned-over edge 5212 and the fourth turned-over edge 5222 can make the contact area between the oil smoke and the ventilation hole more when the oil smoke passes through the ventilation hole, so that the oil-fat separation degree can be improved.
The second turned-over edge 5212 and the fourth turned-over edge 5222 form an inclined angle α relative to the plane of the frame 51, and the value range of α is preferably 30-60 °, so as to better guide the airflow directly to the air inlet 31 of the fan 3. If the inclination angle is too small, the flow area is too small, so that the performance of the fan 3 is affected; the inclination angle is too large to play a direct guiding role. The inclination angles of the second and fourth flanges 5212 and 5222 may not be the same, and they may also have the function of adjusting the size of the air intake area.
The height of second turn-ups 5212 and fourth turn-ups 5222 is c, and the preferred 5mm ~12mm that is of the value scope of c, and two turn-ups highly enough can play effectual guide effect, otherwise the guide effect is not enough, and too big then the sheet metal mould one shot forming can not realize.
The distance between two adjacent first vent holes 521, that is, the distance between the first turned-over edge 5211 of the first vent hole 521 and the second turned-over edge 5212 of the adjacent first vent hole 521 at the end of the back of the frame 51 is d1, the distance between two adjacent second vent holes 522, that is, the distance between the third turned-over edge 5221 of the second vent hole 522 and the end of the back of the fourth turned-over edge 5222 of the adjacent second vent hole 522 is d2, and the value ranges of d1 and d2 are preferably 10mm to 15mm, and the distances and the widths of the vent holes jointly affect the ventilation area of the oil screen and the appearance of the oil screen, so that the range can ensure a reasonable ventilation area and good aesthetics.
The diameter of the air inlet 31 of the fan 3 is D, the distance between the center of the oil screen 5 and the center of the air inlet 31 is S, and the following relations are satisfied: 0.25D is less than S, so that the oil screen 5 is prevented from being too close to the air inlet 31 of the fan 3, because the air inlet of the middle part of the oil screen 5 is difficult, if the oil screen 5 is too close to the air inlet 31 of the fan 3, the air inlet of the fan 3 is seriously influenced, and the performance of the fan 3 is reduced; and a certain distance is ensured, so that the influence of the middle part of the oil net 5 on the air inlet of the fan 3 is small.
Claims (8)
1. An oil screen for a range hood, including frame (51) and the ventilation hole of seting up in frame (51), every ventilation hole sets up along the width direction of frame (51) to each ventilation hole is arranged at interval side by side in the length direction of frame (51), frame (51) has first end (511) and second end (512) in the length direction, its characterized in that: the periphery of the frame (51) is provided with a folded edge (513) extending towards the back of the frame (51), the ventilation holes comprise at least two first ventilation holes (521) and at least two second ventilation holes (522), each first ventilation hole (521) is arranged between the middle and the first end (511) of the frame (51), and the air inlet area of each first ventilation hole (521) is gradually increased from the middle to the first end (511) of the frame (51); each second vent hole (522) is arranged between the middle and the second end (512) of the frame (51), and the air inlet area of the single second vent hole (522) is gradually increased from the middle to the second end (512) of the frame (51);
the width a1 of the single first ventilation hole (521) is gradually increased from the middle to the first end (511) of the frame (51); the width a2 of the single second vent hole 522 is gradually increased from the middle to the second end 512 of the frame 51;
each first ventilation hole (521) extends out of a first flanging (5211) and a second flanging (5212) to the back of the frame (51) respectively at two sides of the frame (51) in the length direction, the first flanging (5211) is positioned at one side of the first ventilation hole (521) close to the middle of the frame (51), the second flanging (5212) is positioned at the other side of the first ventilation hole (521) far away from the middle of the frame (51), and the first flanging (5211) is connected with the second flanging (5212) of the adjacent first ventilation hole (521) on the front side of the frame (51); each second vent hole (522) is formed in each of two sides of the frame (51) in the length direction and extends out of a third flanging (5221) and a fourth flanging (5222) towards the back of the frame (51), the third flanging (5221) is located on one side, close to the middle of the frame (51), of each second vent hole (522), the fourth flanging (5222) is located on the other side, far away from the middle of the frame (51), of each second vent hole (522), the third flanging (5221) is connected with the fourth flanging (5222) of the adjacent second vent hole (522) in the front of the frame (51), and the first flanging (5211) of the adjacent first vent hole (521) and the third flanging (5221) of the second vent hole (522) in the middle are connected in the front of the frame (51); the distance between the tail ends of the first flange (5211) and the second flange (5212) of each first vent hole (521) on the back surface of the frame (51) is the width a1 of the first vent hole (521); the distance between the ends of the third flanging (5221) and the fourth flanging (5222) of each second ventilation hole (522) on the back surface of the frame (51) is the width a2 of the second ventilation hole (522).
2. The oil screen for a range hood according to claim 1, wherein: the value ranges of the width a1 and the width a2 are respectively 8 mm-20mm.
3. The oil screen for a range hood according to claim 1, wherein: the second flange (5212) gradually slantingly extends toward the first flange (5211) of the same first vent hole (521), and the fourth flange (5222) gradually slantingly extends toward the third flange (5221) of the same second vent hole (522).
4. The oil screen for a range hood according to claim 3, wherein: the second turned-over edge (5212) and the fourth turned-over edge (5222) form an inclination angle alpha relative to the plane of the frame (51), and the value range of the inclination angle alpha is 30-60 degrees.
5. The oil screen for a range hood according to claim 4, wherein: the heights of the second turned-over edge (5212) and the fourth turned-over edge (5222) are both c, and the value range of the height c is 5mm to 12mm.
6. The oil screen for a range hood according to claim 1, wherein: the distance between the first turned edge (5211) of each first vent hole (521) and the tail end of the second turned edge (5212) of the adjacent first vent hole (521) on the back side of the frame (51) is d1, the distance between the third turned edge (5221) of each second vent hole (522) and the tail end of the back side of the fourth turned edge (5222) of the adjacent second vent hole (522) is d2, and the value ranges of the distance d1 and the distance d2 are respectively 10mm to 15mm.
7. A side-draught range hood applying the oil screen of any one of claims 1 to 6 comprises a smoke collecting hood (1), a fan hood (2) and a fan (3), wherein the smoke collecting hood (1) is installed below the fan hood (2), the fan (3) is installed in the fan hood (2) and is partially positioned on the back side of the smoke collecting hood (1), and the oil screen (5) is arranged on the front side of the smoke collecting hood (1).
8. The side draft range hood according to claim 7, wherein: the fan (3) is provided with an air inlet (31), the diameter of the air inlet (31) is D, the distance between the air inlet (31) of the fan (3) and the center of the oil screen (5) is S, and the parameters meet the following relations: 0.25D < S.
Priority Applications (1)
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CN201710057672.XA CN107191987B (en) | 2017-01-23 | 2017-01-23 | Oil screen for range hood and side-draft range hood applying same |
Applications Claiming Priority (1)
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CN201710057672.XA CN107191987B (en) | 2017-01-23 | 2017-01-23 | Oil screen for range hood and side-draft range hood applying same |
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CN107191987A CN107191987A (en) | 2017-09-22 |
CN107191987B true CN107191987B (en) | 2022-10-21 |
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Families Citing this family (3)
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CN110542132B (en) * | 2018-05-28 | 2024-08-16 | 宁波方太厨具有限公司 | Lampblack filtering device and range hood with same |
CN110043937B (en) * | 2019-04-29 | 2024-01-16 | 宁波方太厨具有限公司 | Side-suction type range hood |
CN111288527B (en) * | 2020-03-31 | 2022-04-19 | 宁波方太厨具有限公司 | Fume exhaust fan |
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