CN106524267B - Ceiling type range hood - Google Patents
Ceiling type range hood Download PDFInfo
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- CN106524267B CN106524267B CN201611252124.4A CN201611252124A CN106524267B CN 106524267 B CN106524267 B CN 106524267B CN 201611252124 A CN201611252124 A CN 201611252124A CN 106524267 B CN106524267 B CN 106524267B
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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
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- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a top-suction type range hood, which comprises a smoke collecting hood and an auxiliary fan for injection, wherein the smoke collecting hood is upwards sunken to form a smoke collecting cavity, an air inlet is formed in the smoke collecting hood, a cavity is formed in the part of the smoke collecting hood around the air inlet, an air outlet of the auxiliary fan faces into the cavity, and an injection air outlet which faces the air inlet in an upwards-inclined manner is arranged at the bottom of the outer side of the cavity, and the top-suction type range hood is characterized in that: the lowest point of the air inlet of the auxiliary fan is not lower than the air inlet of the smoke collecting hood and sucks gas entering from the air inlet of the smoke collecting hood, and the cavity, the injection air outlet, the smoke collecting cavity, the air inlet of the smoke collecting hood and the auxiliary fan form a circulating flow channel for circulating gas. The gas circularly flows in the circulating flow passage to generate negative pressure, and the rising oil fume is guided to flow and gather to the air inlet of the range hood, so that the oil fume suction effect is greatly improved, and the oil fume is prevented from escaping.
Description
Technical Field
The invention relates to a range hood, in particular to a top suction type range hood.
Background
Most of the existing top-suction range hoods (thin, deep or tower range hoods installed right above the kitchen range, excluding side-suction and bottom-discharge) have the following structural forms: the top is provided with a smoke collecting cover to form an inwards concave cavity (smoke collecting cavity), and the smoke collecting cover is provided with an air inlet and a filter screen. The oil smoke generated in the cooking process is collected in the smoke collecting cavity and is exhausted outdoors through the air duct communicated with the smoke collecting cavity.
The top suction type range hood disclosed in the chinese patent application with the application number of 201410315985.7 comprises a smoke collecting hood and an air inlet arranged on the bottom surface of the smoke collecting hood, wherein an oil collecting plate is fixed under the air inlet and forms an air inlet channel with the bottom surface of the air inlet, and a flow guide hood is arranged on the lower surface of the oil collecting plate.
Above-mentioned this kind of range hood, the produced oil smoke of kitchen range below it is at the in-process that rises, through the kuppe with the oil smoke leading-in to the air intake, though this kind of range hood can inhale the oil smoke as far as through the setting of oil collecting plate and kuppe, if the oil smoke volume of production is great or when having the disturbance of external air current, the oil smoke is very easy to escape from the position of collection petticoat pipe both sides, not only can reduce range hood's smoking efficiency from this, if produce the phenomenon that the oil smoke escaped, cause the influence to the environment in kitchen easily, also can influence user's health.
At present, the air curtain is usually formed to prevent oil smoke from escaping, for example, as disclosed in chinese patent with application No. 200510106682.5, the air curtain is composed of a smoke exhaust pipeline, a filter screen, an adsorbing material, a pressure release valve, a parabolic outer cylinder, a hyperbolic horn mouth, a fan exhaust pipeline, a centrifugal fan, a circulation groove, an oil smoke inlet, an oil intercepting groove, an air curtain blast pipe, a fan air inlet, a backflow sleeve, a smoke exhaust pipeline outlet and a bottom plate.
The traditional air curtain technology of the range hood is that a fan of a rotational flow oil fume entrainment device is isolated from oil fume, on one hand, air is supplied to form an air curtain for air isolation and heat insulation, and on the other hand, air is supplied to a circular flow groove, so that air flow rotates at a high speed to form low-pressure core oil fume entrainment. The technology has the disadvantages that the air curtain prevents gas from flowing to the interior of the range hood while isolating oil smoke, so that the oil smoke escaping to the periphery is difficult to capture and escape; further, the circulation path of the air curtain includes: 1. a centrifugal fan, a V-shaped groove, a discharge flue outlet, an indoor unit and the centrifugal fan; 2. a centrifugal fan, namely an air curtain outlet, an oil smoke inlet, a discharge flue outlet, an indoor unit and the centrifugal fan; 3. the circulation mode of the oil smoke inlet-the discharge flue outlet-the indoor-the oil smoke inlet can cause the indoor environment pollution.
There is also a range hood with an ejector as shown in fig. 6, a fan 1' of the ejector enters air from the outside of the range hood to generate a certain negative pressure suction effect on external oil smoke, so that the oil smoke in a critical state escapes to the outside of the range hood acting space due to the effect of the fan and contacts with a human body, so that the oil smoke is absorbed by the human body, generates air pollution and affects the health of the human body; in addition, air is sucked from the outside of the range hood, so that disturbance of the outside air is easily caused, and oil smoke is easily escaped.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a top-suction type range hood which prevents oil smoke from escaping and improves the oil smoke suction effect.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a top suction type range hood, includes collection petticoat pipe and the auxiliary fan that is used for drawing the penetrating, the collection petticoat pipe upwards caves in and forms collection smoke chamber, the air intake has been seted up on the collection petticoat pipe, the collection petticoat pipe forms the cavity in the part around the air intake, auxiliary fan's air outlet is towards the cavity intracavity, the outside bottom of cavity is provided with the ejection air outlet that draws towards the air intake with inclining upwards, its characterized in that: the lowest point of the air inlet of the auxiliary fan is not lower than the air inlet of the smoke collecting hood and sucks gas entering from the air inlet of the smoke collecting hood, and the cavity, the injection air outlet, the smoke collecting cavity, the air inlet of the smoke collecting hood and the auxiliary fan form a circulating flow channel for circulating gas.
Preferably, the angle of inclination between the injection air outlet and the horizontal direction is alpha, the value range of alpha is 15-45 degrees, the injection effect cannot be realized when the angle is too small, and the wind resistance is larger when the angle is too large.
For the biggest scope realize drawing and penetrate, avoid the oil smoke escape, draw the air outlet and be the bar wind gap, draw the downside border of air outlet and be the level.
For guaranteeing certain induced draft air speed, reduce the windage simultaneously, it is a to draw the length of air outlet on the horizontal direction, highly be b in vertical direction, and a and b satisfy: 10 < a/b < 50.
According to the invention, the fume collecting hood is preferably structured in such a way that a fan cover is arranged above the fume collecting hood, the fume collecting hood comprises a lower cover plate, vertical side plates, an upper cover plate and a horizontal bottom plate, the air inlet is formed in the middle of the lower cover plate, the lower cover plate inclines upwards from the outer edge to the middle, so that the fume collecting cavity is formed below the lower cover plate, the outer edge of the lower cover plate is connected to the inner edge of the bottom plate, the outer edge of the bottom plate is connected to the bottom end of the side plate, the top end of the side plate is connected to the outer edge of the upper cover plate, the inner edges of the lower cover plate and the upper cover plate are connected to the corresponding side walls of the fan cover, and the cavity is defined among the.
In order to facilitate the fixing of the auxiliary fan, the auxiliary fan is arranged on the side walls of the left side, the right side and the front side of the fan cover and is positioned between the upper cover plate and the lower cover plate.
According to the invention, the injection air outlet is preferably arranged in a manner that the position of the lower cover plate close to the outer edge is bent downwards to form an air outlet part, the bottom end of the air outlet part is connected with the bottom plate, and the injection air outlet is arranged on the air outlet part.
Preferably, the lower cover plate, the side plates, the upper cover plate and the bottom plate are integrally formed for convenience of manufacture.
Preferably, the auxiliary fan is an axial fan or a centrifugal fan.
Compared with the prior art, the invention has the advantages that: through forming the internal circulation flow channel, the gas circularly flows in the circulation flow channel to generate negative pressure and guide the rising oil fume to flow and gather to the air inlet of the range hood, thereby solving the problem that the traditional air curtain blocks the air to flow to the inlet of the range hood, greatly improving the oil fume suction effect and preventing the oil fume from escaping; in addition, because the ejection gas is circularly flowing gas carrying oil smoke, clean air does not need to be sucked from the outside, and the efficiency of sucking the oil smoke can be improved compared with the flow guide of the clean air under the condition of unchanged air outlet quantity; meanwhile, the gas in the range hood is sucked to inject, so that disturbance of external air flow cannot be caused, and oil smoke escape caused by disturbance of the external air flow is avoided.
Drawings
Fig. 1 is a schematic structural view of a first embodiment of a top-suction range hood according to the present invention;
fig. 2 is an exploded schematic view of the range hood of fig. 1;
FIG. 3 is a cross-sectional view of the range hood of FIG. 1;
FIG. 4 is an inverted schematic view of the range hood of FIG. 1;
FIG. 5 is a cross-sectional view of a second embodiment of the top suction extractor hood of the present invention;
fig. 6 is a range hood with an injection device in the prior art.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Example one
Referring to fig. 1 to 4, a ceiling-mounted range hood includes a fume collecting hood 1, a fan hood 2 disposed above the fume collecting hood 1, and a main fan 3 disposed in the fan hood 2. The fume collecting cover 1 is provided with a first air inlet 11, and fume gas is sucked from the first air inlet 11 and is discharged into the public flue through the main fan 3. The fan guard 2 comprises four side walls 21 forming a square fan guard 2.
The fume collecting hood 1 comprises a lower cover plate 12, a vertical side plate 13, an upper cover plate 14 and a horizontal bottom plate 15, wherein the first air inlet 11 is formed in the middle of the lower cover plate 12, the lower cover plate 12 inclines upwards from the outer edge to the middle, and a fume collecting cavity 16 is formed below the lower cover plate 12. The outer edge of the lower cover plate 12 is connected to the inner edge of the bottom plate 15, the outer edge of the bottom plate 15 is connected to the bottom end of the side plate 13, the top end of the side plate 13 is connected to the outer edge of the upper cover plate 14, and the inner edges of the lower cover plate 12 and the upper cover plate 14 are connected to the side wall 21 of the corresponding side of the fan guard 2. The upper cover plate 14 may be inclined in the same direction as the lower cover plate 12. The upper cover plate 14, the lower cover plate 12, the side plates 13 and the bottom plate 15 define a cavity 17 therebetween. The lower cover plate 12, the side plate 13, the upper cover plate 14, and the bottom plate 15 may be integrally formed.
An oil screen 4 is arranged below the first air inlet 11, and the oil screen 4 can be fixed with the part of the lower cover plate 12 around the first air inlet 11.
The bottom end of the side wall 21 of the fan guard 2 extends to the part of the lower cover plate 12 around the first air inlet 11, and the side wall 21 of the fan guard 2 is fixedly connected with the lower cover plate 12 and the upper cover plate 14.
The fan housing 2 is provided with auxiliary fans 5 on the left and right sides and the front side wall 21, in this embodiment, the auxiliary fans 5 are axial fans, the second air inlet 51 of the auxiliary fan 5 faces the inside of the fan housing 2, the lowest point of the second air inlet is not lower than the first air inlet 11 of the smoke collecting hood 1, and the air outlet 52 of the auxiliary fan 5 faces the inside of the cavity 17, so that the air entering from the first air inlet 11 of the smoke collecting hood 1 is sucked and discharged into the cavity 17. The lower cover plate 12 is bent and extended downward near the outer edge to form an air outlet portion 18, and the bottom end of the air outlet portion 18, i.e., the outer edge of the lower cover plate 12, is connected to the bottom plate 15. The air outlet portion 18 is provided with a strip-shaped ejection air outlet 181, the ejection air outlet 181 extends in the length direction of the corresponding air outlet portion 18, for example, the air outlet portions 18 on both sides extend in the front and rear directions, and the air outlet portion 18 on the front side extends in the left and right directions. The ejection air outlet 181 inclines towards the first air inlet 11, the inclination angle of the ejection air outlet 181 with the horizontal direction is alpha, the preferred value range of alpha is 15-45 degrees, the lower side edge of the ejection air outlet 181 is parallel to the bottom plate 15 of the exhaust fume collecting hood 1, and the bottom plate 15 is horizontal and generally parallel to the surface of a cooker, so that the ejection effect of the whole ejection air outlet 181 can be ensured to be generated at the same time, and the oil fume can not be guided successively by the ejection air outlet 181 due to non-parallelism, or the oil fume can not be guided (the oil fume escapes before reaching the ejection air outlet 181) to escape the oil fume.
The cavity 17, the ejection air outlet 181, the smoke collection chamber 16, the first air inlet 11 of the smoke collection cover 1 and the auxiliary fan 5 together form a circulation flow channel, and a flow path of the gas in the circulation flow channel is shown as an arrow. Gaseous at circulation flow path inner loop flow, produce the negative pressure, the oil smoke that the guide rises flows to the first air intake 11 of range hood, the gathering, thereby the problem of traditional wind curtain hindrance air to range hood import flow has been solved, promote the oil absorption cigarette effect greatly, prevent the oil smoke escape, furthermore, because draw the gas of smuggleing secretly the oil smoke of gas for circulation flow, and need not roll up from the outside and inhale clean air, under the unchangeable condition of air output, compare in the clean air water conservancy diversion more can improve the efficiency of oil absorption cigarette, simultaneously because the inside gas of range hood of suction is in order to draw and penetrate, therefore, can not lead to the disturbance of outside air current, and avoid leading to the escape of oil smoke because of the disturbance of outside air.
The distance between the upper side edge of the injection air outlet 181 and the top of the air outlet part 18 is 2mm < d < 5 mm; the length of the injection air outlet 181 in the horizontal direction is a, the height in the vertical direction is b, b is more than 2mm and less than 5mm, and a/b is more than 10 and less than 50, so that a certain injection airflow speed is ensured, and meanwhile, the wind resistance is reduced.
Example two
Referring to fig. 5, in the present embodiment, the difference from the first embodiment is that the auxiliary fan 5 adopts a centrifugal fan instead of the centrifugal fan, and at this time, two centrifugal fans are arranged at the front end, and are respectively close to the left and right sides, the centrifugal fan on the left side blows air into the left side cavity 17, and the centrifugal fan on the right side blows air into the right side cavity 17; the air outlets of the centrifugal fans arranged on the left side and the right side face forwards and respectively blow air into the cavity 17 on the front side.
Claims (7)
1. The utility model provides a top suction type range hood, includes collection petticoat pipe (1) and is used for drawing auxiliary fan (5) of penetrating, collection petticoat pipe (1) is upwards sunken and is formed collection cigarette chamber (16), first air intake (11) have been seted up on collection petticoat pipe (1), collection petticoat pipe (1) forms cavity (17) in the part around first air intake (11), air outlet (52) of auxiliary fan (5) are towards in cavity (17), the outside bottom of cavity (17) is provided with the ejection air outlet (181) of penetrating towards first air intake (11) tilt up, its characterized in that: the lowest point of the second air inlet (51) of the auxiliary fan (5) is not lower than the first air inlet (11) of the fume collecting hood (1) and sucks gas entering from the first air inlet (11) of the fume collecting hood (1), and the cavity (17), the injection air outlet (181), the fume collecting cavity (16), the first air inlet (11) of the fume collecting hood (1) and the auxiliary fan (5) form a circulating flow channel for circulating gas; collection petticoat pipe (1) is including apron (12) and horizontally bottom plate (15) down, first air intake (11) are seted up in the middle of apron (12) down, apron (12) are tilt up to the centre by outside edge down, from this down apron (12) below form collection smoke chamber (16), the outside edge of apron (12) is connected to the inboard edge of bottom plate (15) down, apron (12) are close to the position of outside edge and are buckled downwards and extend and form air-out portion (18) down, the bottom and bottom plate (15) of air-out portion (18) are connected, draw air outlet (181) to set up on air-out portion (18), draw air outlet (181) to be the bar wind gap, draw the downside border of air outlet (181) to be the level.
2. The ceiling-mounted range hood according to claim 1, wherein: the inclined angle of the injection air outlet (181) and the horizontal direction is alpha, and the value range of alpha is 15-45 degrees.
3. The ceiling-mounted range hood according to claim 1, wherein: draw and penetrate air outlet (181) length on the horizontal direction be an, highly be b in the vertical direction, and a and b satisfy: 10 < a/b < 50.
4. The ceiling-mounted range hood according to any one of claims 1 to 3, wherein: be provided with fan cover (2) above collection petticoat pipe (1), collection petticoat pipe (1) still includes vertical curb plate (13), upper cover plate (14), the outside edge of bottom plate (15) is connected to the bottom of curb plate (13), the top of curb plate (13) is connected to the outside edge of upper cover plate (14), the inboard edge of lower apron (12) and upper cover plate (14) all is connected to on fan cover (2) corresponding lateral wall (21), inject between upper cover plate (14), lower apron (12), curb plate (13) and bottom plate (15) cavity (17).
5. The ceiling-mounted range hood according to claim 4, wherein: the auxiliary fans (5) are arranged on the side walls (21) of the left, right and front sides of the fan cover (2) and are located between the upper cover plate (14) and the lower cover plate (12).
6. The ceiling-mounted range hood according to claim 4, wherein: the lower cover plate (12), the side plate (13), the upper cover plate (14) and the bottom plate (15) are integrally formed.
7. The ceiling-mounted range hood according to any one of claims 1 to 3, wherein: the auxiliary fan (5) is an axial flow fan or a centrifugal fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611252124.4A CN106524267B (en) | 2016-12-30 | 2016-12-30 | Ceiling type range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611252124.4A CN106524267B (en) | 2016-12-30 | 2016-12-30 | Ceiling type range hood |
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| Publication Number | Publication Date |
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| CN106524267A CN106524267A (en) | 2017-03-22 |
| CN106524267B true CN106524267B (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611252124.4A Active CN106524267B (en) | 2016-12-30 | 2016-12-30 | Ceiling type range hood |
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| CN107084417A (en) * | 2017-06-06 | 2017-08-22 | 祝子荣 | A kind of oil smoke integrated stove for possessing full negative pressure chamber |
| CN108006758B (en) * | 2017-06-30 | 2024-02-20 | 宁波方太厨具有限公司 | Top suction type range hood with blowing mechanism |
| CN109595620B (en) * | 2017-09-30 | 2024-02-20 | 宁波方太厨具有限公司 | Fume exhauster |
| CN109595622B (en) * | 2017-09-30 | 2024-01-16 | 宁波方太厨具有限公司 | Fume exhauster |
| CN109595619B (en) * | 2017-09-30 | 2024-02-20 | 宁波方太厨具有限公司 | Smoke guide plate and range hood using same |
| CN109595638B (en) * | 2017-09-30 | 2024-01-16 | 宁波方太厨具有限公司 | Near-suction type range hood |
| CN107575919B (en) * | 2017-10-27 | 2019-03-22 | 珠海格力电器股份有限公司 | A kind of range hood |
| CN110388668A (en) * | 2018-04-17 | 2019-10-29 | 宁波方太厨具有限公司 | A kind of range hood |
| CN109059072A (en) * | 2018-09-21 | 2018-12-21 | 珠海格力电器股份有限公司 | Fume extracting system and kitchen appliance system |
| CN109000295B (en) * | 2018-09-27 | 2023-09-08 | 佛山市顺德区美的洗涤电器制造有限公司 | Range hood shell and range hood with same |
| CN109253484A (en) * | 2018-11-13 | 2019-01-22 | 林德祥 | Smoke evacuation system |
| CN110173731B (en) * | 2019-06-26 | 2023-12-26 | 杭州老板电器股份有限公司 | Side-draft range hood with injection structure |
| CN110186095A (en) * | 2019-06-26 | 2019-08-30 | 杭州老板电器股份有限公司 | A kind of dual injection helps the range hood of suction |
| CN110345540B (en) * | 2019-08-22 | 2020-11-24 | 美的集团股份有限公司 | Smoke exhaust ventilator |
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| KR100202119B1 (en) * | 1996-04-12 | 1999-06-15 | 니시무로 타이죠 | Range hood fan |
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