EP2530388A1 - Exhaust hood - Google Patents
Exhaust hood Download PDFInfo
- Publication number
- EP2530388A1 EP2530388A1 EP20120004126 EP12004126A EP2530388A1 EP 2530388 A1 EP2530388 A1 EP 2530388A1 EP 20120004126 EP20120004126 EP 20120004126 EP 12004126 A EP12004126 A EP 12004126A EP 2530388 A1 EP2530388 A1 EP 2530388A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- enclosure
- volute
- wall
- hood according
- inlet opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001154 acute effect Effects 0.000 claims description 2
- 238000010411 cooking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Glass Compositions (AREA)
Abstract
- a centrifugal fan (2) comprising a volute (21) and a wheel (22) positioned inside the volute (21), the wheel (22) having an axis (220) of rotation; the volute (21) comprising a first inlet opening (210) allowing entry of air inside the volute (21); the volute (21) comprising a first and a second side (211, 212) extending transversally to a direction identified by the axis (220) of rotation; the first side (211) circumscribing the first inlet opening (210);
- an enclosure (3) housing at least a part of the volute (21) and the wheel (22).
Description
- This invention relates to a hood for a domestic kitchen.
- Known in the prior art are hoods for domestic kitchens comprising:
- a centrifugal fan comprising a volute and a wheel positioned inside the volute, the wheel having an axis of rotation; the volute comprising a first inlet opening allowing entry of air inside the volute; the volute comprising a first and a second side extending transversally to a direction identified by the axis of rotation; the first side circumscribing the first inlet opening; the centrifugal fans having an air inlet direction substantially at right angles to the air outlet direction;
- an enclosure substantially in the shape of a parallelepiped housing the volute and the wheel;
- The enclosure comprises a lower air inlet opening. On an upper surface (in a position substantially opposite the lower opening) the enclosure comprises an opening through which the air coming from the volute passes. Conveniently, the hoods comprise a lower structure for collecting air having a substantially horizontal main direction of extension and an upper flue having a mainly vertical direction.
- The enclosure is housed in the flue. More specifically, the flue comprises a front decorative cover which extends vertically and is parallel to and against a first face of the parallelepiped-shaped housing.
- The inlet opening of the centrifugal fan is substantially parallel to a second face of the parallelepiped-shaped enclosure, the second face being at right angles to the first face. The air enters inside the enclosure from the bottom, then flows into the volute and lastly is expelled from the enclosure through an upper surface of the enclosure.
- In order to limit the size of the enclosure the inlet opening of the volute is positioned against the face of the enclosure and this generates noise and major head losses; in effect, immediately upstream of the inlet opening there is a reduced passage cross-section at which there is also a sudden change of direction of the air flow.
- In this context, the technical purpose which forms the basis of this invention is to provide a hood that overcomes the above mentioned drawbacks of the prior art.
- More specifically, an important aim of this invention is to provide a hood which is capable of minimising the head losses and the noise.
- The technical purpose indicated and the aims specified are substantially achieved by a hood comprising the technical features described in one or more of the accompanying claims.
- Further features and advantages of this invention are more apparent from the non-limiting description which follows of a preferred, non-limiting embodiment of a hood as illustrated in the accompanying drawings, in which:
-
Figure 1 is a perspective view of a hood according to this invention with some parts cut away to allow the parts behind to be seen; -
Figure 2 is a schematic top view of a portion of the hood ofFigure 1 . With reference to the accompanying drawings, the numeral 1 denotes a hood. The hood is a hood for a domestic kitchen. It is suitable for household use. - The hood 1 comprises a
fan 2, typically of a centrifugal type, comprising avolute 21 and awheel 22 positioned inside thevolute 21, thewheel 22 having anaxis 220 of rotation. - The adjectives "radial" and "axial" are relative to the
axis 220 of rotation of thewheel 22. - The
volute 21 comprises a first inlet opening 210 allowing entry of the air inside thevolute 21. Thevolute 21 comprises afirst side 211 extending transversally to a direction identified by theaxis 220 of rotation. Thefirst side 211 circumscribes the first inlet opening 210. More specifically, thefirst side 211 delimits the first inlet opening 210. - The hood 1 also comprises an enclosure 3 housing at least a part of the
volute 21 and thewheel 22. As shown by way of an example in the accompanying drawings, thevolute 21 and thewheel 22 are completely contained in the enclosure 3 (in this regard, the enclosure 3, as illustrated in the accompanying drawings, is hollow). - The enclosure 3 comprises a first and a
second wall - The first and the
second wall first zone 30 of reciprocal connection. As shown by way of example in the accompanying drawings, the first and thesecond wall second wall - At least a part of the
first wall 51 of thevolute 21 faces thefirst connection zone 30. - More specifically, the first inlet opening 210 is inside the enclosure 3 and faces the
first connection zone 30. Conveniently, the distance, measured on theaxis 220 of rotation, between the enclosure 3 and the first inlet opening 210 is greater than 1/4 of the external diameter of thewheel 22, preferably it is greater than 1/3 of the external diameter of thewheel 22, even more preferably it is greater than half of the external diameter of thewheel 22. In a specific embodiment, the distance, measured on theaxis 220 of rotation, between the enclosure 3 and thefirst inlet opening 210 is conveniently greater than 1/4 of an internal reference diameter, preferably it is greater than 1/3 of the internal reference, even more preferably it is greater than half of the internal reference diameter (the internal reference diameter being the distance between the inlet edges of any pair of opposite blades relative to theaxis 220 of rotation of the wheel 22). - Typically, with a
wheel 22 having a diameter of the inlet edge of the blades (that is, the internal reference diameter) equal to 130 mm and in the case in which theaxis 220 of rotation of thewheel 22 is inclined by approximately 45° relative to the first or thesecond wall second wall axis 220 of rotation of thewheel 22 is horizontal. In this way, advantageously, a straight line at right angles to an outlet cross-section of thevolute 21 is vertical and a straight line at right angles to the first inlet opening 210 of thevolute 21 is horizontal. In other words, the ideal direction of the air leaving thevolute 21 is vertical, whilst the ideal direction of the air entering thevolute 21 is horizontal. - In the preferred embodiment, the enclosure 3 forms a space shaped substantially as a parallelepiped (which could have a square or rectangular base) or as a cube (or more generally as a right prism).
- The first and the
second wall axis 220 ofrotation 22 of the wheel. In the preferred solution the enclosure 3 comprises alower base 61, anupper base 62 and aside surface 63 connecting thelower base 61 and theupper base 62. The first and thesecond wall side surface 63. The enclosure 3 comprises alower opening 35 through which air enters the enclosure 3. Thelower opening 35 faces downwards. Thelower opening 35 is formed in the lower base 61 (in some cases thelower opening 35 occupies entirely the lower base 61). Thedelivery side 214 of thevolute 21 is preferably formed on theupper base 62. Conveniently, theupper base 62 and/or thelower base 61 are/is horizontal. - The hood 1 also comprises a
decorative cover 4 having a front portion substantially parallel to areference plane 40; the front portion of thedecorative cover 4 conceals at least a part of the enclosure 3 to an outside observer; thesecond wall 52 of the enclosure 3 is substantially parallel to thereference plane 40; a vertical plane containing theaxis 220 of rotation forms with thereference plane 40 an acute angle of between 15° and 75°, advantageously it is between 25° and 65°, preferably it is between 40° and 50°. Thereference plane 40 is substantially vertical. - It consists of a first imaginary
vertical plane 9 containing a first and a second edge of the enclosure 3, the enclosure 3 being cubic or parallelepiped in shape and the first and the second edge being parallel and not belonging to a same wall of the enclosure 3. Theaxis 220 of rotation of thewheel 22 and the firstimaginary plane 9 being parallel or coincident or forming an angle less than 20° (in this regard, the firstimaginary plane 9 and theaxis 220 of rotation have infinite extension). Conveniently, thedecorative cover 4 forms and delimits a hollow space. The enclosure 3 preferably comprises a third and afourth wall second zone 301 of reciprocal connection. The third and thefourth wall volute 21 also comprises: - a
second side 212 extending transversally to theaxis 220 of rotation; - a second inlet opening 213 circumscribed by the
second side 212. Thesecond side 212 faces thesecond connection zone 301. In the embodiment illustrated, the centrifugal fan 1 has a double inlet and a single outlet. Conveniently, the second inlet opening 213 is inside the enclosure 3 and faces thesecond connection zone 301. - The
first connection zone 30 is ajunction edge 300 between the first and thesecond wall - A first translation of the
junction edge 300 or the rounded fitting or the flat chamfer intersects a least a part of the first inlet opening 210, the first translation occurring along a direction identified by theaxis 220 of rotation. As shown by way of example in the accompanying drawings, the first inlet opening 210 of thevolute 21 is not parallel to any of the walls of the enclosure 3. - The hood 1 comprises a
first structure 71 having a horizontal main direction of extension and asecond structure 72 overlapping thefirst structure 71 and having a vertical main direction of extension. Thefirst structure 71 conveniently defines a collector which facilitates the conveying of the air into thesecond structure 72. Conveniently, the enclosure 3 lies inside thesecond structure 72. - This invention also relates to a system comprising:
- a cooking top;
- a hood 1 surmounting the cooking top, the hood having one or more of the technical features described above.
- The invention described brings many advantages.
- Firstly, it can increase the flow of air drawn inside since the first inlet opening faces towards a corner of the enclosure and thus increases the space in front of the inlet opening. This increase in space allows lower air speeds at the inlet to the volute and, consequently, the distributed head losses, since they are proportional to the square of the air speed, are significantly less. Consequently, it is possible to have a lower air speed and, thus, a potential lower noise. Lower head losses allow the selection of the electric motor for driving the wheel to be optimised.
- It shall be understood that the invention described above may be modified and adapted in several ways without departing from the scope of the inventive concept. Moreover, all the details of the invention may be substituted by other technically equivalent elements. In practice, the embodiments of the invention may be made from any material, and in any size, depending on requirements.
Claims (12)
- A hood for a domestic kitchen comprising:- a centrifugal fan (2) comprising a volute (21) and a wheel (22) positioned inside the volute (21), the wheel (22) having an axis (220) of rotation; the volute (21) comprising a first inlet opening (210) allowing entry of air inside the volute (21); the volute (21) comprising a first side (211) extending transversally to a direction identified by the axis (220) of rotation; the first side (211) circumscribing the first inlet opening (210);- an enclosure (3) housing the volute (21) and the wheel (22); the enclosure (3) comprising a first and a second wall (51, 52) reciprocally convergent and connecting in a first zone (30) of reciprocal connection, the first and the second wall (51, 52) not being coplanar;
characterised in that at least a part of the first face (51) of the volute (21) faces the first connection zone (30). - The hood according to claim 1, characterised in that the first inlet opening (210) is inside the enclosure (3) and faces the first connection zone (30).
- The hood according to any of the preceding claims, characterised in that the enclosure (3) forms an inner space with the shape of a parallelepiped or a cube.
- The hood according to any of the preceding claims, characterised in that the first wall (51) and the second wall (52) are substantially vertical.
- The hood according to any of the preceding claims, characterised in that it comprises a decorative cover (4) having a front portion substantially parallel to a reference plane (40); the front portion of the decorative cover (4) concealing at least a part of the enclosure (3) to an outside observer; the second wall (52) of the enclosure (3) being substantially parallel to the reference plane (40); a vertical plane containing the axis (220) of rotation forming with the reference plane (40) an acute angle of between 25° and 65°.
- The hood according to any of the preceding claims, characterised in that the enclosure (3) comprises a third and a fourth wall (33, 34) converging in a second zone (301) of reciprocal connection, the third and the fourth wall (33, 34) not being coplanar; the volute (21) comprising:- a second side (212) extending transversally to a direction identified by the axis (220) of rotation;- a second inlet opening (213) circumscribed by the second side (212), the second side (212) facing the second connection zone (301).
- The hood according to claim 6, characterised in that the second inlet opening (213) is inside the enclosure (3) and faces the second connection zone (301).
- The hood according to any of the preceding claims, characterised in that the first connection zone (30) is a junction edge (300) between the first and the second wall (51, 52) or a rounded fitting or a flat chamfer.
- The hood according to claim 8, characterised in that a first translation of the junction edge (300) or the rounded fitting or the flat chamfer intersects a least a part of the first inlet opening (210), the first translation occurring along a direction identified by the axis (220) of rotation.
- The hood according to any of the preceding claims, characterised in that the enclosure (3) comprises a lower opening (35) through which air enters the enclosure (3), the lower opening (35) facing downwards.
- The hood according to any of the preceding claims, characterised in that the first inlet opening (210) of the volute (21) is not parallel to any of the walls of the enclosure (3).
- The hood according to any of the preceding claims, characterised in that it consists of a first imaginary vertical plane (9) containing a first and a second edge of the enclosure (3), the enclosure (3) being cubic or parallelepiped in shape and the first and the second edge being parallel and not belonging to a same wall of the enclosure (3); the axis (220) of rotation of the wheel (22) and the first imaginary plane (9) being parallel or coincident or forming an angle less than 20°.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL12004126T PL2530388T3 (en) | 2011-05-31 | 2012-05-29 | Exhaust hood |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000040A ITRN20110040A1 (en) | 2011-05-31 | 2011-05-31 | COOKER HOOD |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2530388A1 true EP2530388A1 (en) | 2012-12-05 |
EP2530388B1 EP2530388B1 (en) | 2015-10-14 |
Family
ID=44554834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12004126.4A Active EP2530388B1 (en) | 2011-05-31 | 2012-05-29 | Exhaust hood |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2530388B1 (en) |
IT (1) | ITRN20110040A1 (en) |
PL (1) | PL2530388T3 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105444239A (en) * | 2015-11-23 | 2016-03-30 | 华帝股份有限公司 | Novel range hood volute |
CN105757744A (en) * | 2014-12-19 | 2016-07-13 | 广东顺德村田电器有限公司 | Air suction purification device for range hood |
CN106402973B (en) * | 2016-11-09 | 2019-04-26 | 华帝股份有限公司 | Range hood volute with noise reduction function |
CN110822505A (en) * | 2018-08-10 | 2020-02-21 | 佛山市顺德区美的洗涤电器制造有限公司 | Smoke exhaust ventilator |
CN114777181A (en) * | 2022-06-21 | 2022-07-22 | 杭州老板电器股份有限公司 | Variable double-cavity range hood |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20005154U1 (en) * | 2000-03-15 | 2000-06-08 | Buercher Friedrich | Extractor hood |
CN200972194Y (en) * | 2006-10-18 | 2007-11-07 | 博西华电器(江苏)有限公司 | Cooking hood |
WO2008047826A1 (en) * | 2006-10-18 | 2008-04-24 | Panasonic Corporation | Range hood |
CN100495874C (en) * | 2003-07-28 | 2009-06-03 | 张志远 | Magnetic suspension drum rotor type full automatic kitchen ventilator |
-
2011
- 2011-05-31 IT IT000040A patent/ITRN20110040A1/en unknown
-
2012
- 2012-05-29 EP EP12004126.4A patent/EP2530388B1/en active Active
- 2012-05-29 PL PL12004126T patent/PL2530388T3/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20005154U1 (en) * | 2000-03-15 | 2000-06-08 | Buercher Friedrich | Extractor hood |
CN100495874C (en) * | 2003-07-28 | 2009-06-03 | 张志远 | Magnetic suspension drum rotor type full automatic kitchen ventilator |
CN200972194Y (en) * | 2006-10-18 | 2007-11-07 | 博西华电器(江苏)有限公司 | Cooking hood |
WO2008047826A1 (en) * | 2006-10-18 | 2008-04-24 | Panasonic Corporation | Range hood |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105757744A (en) * | 2014-12-19 | 2016-07-13 | 广东顺德村田电器有限公司 | Air suction purification device for range hood |
CN105444239A (en) * | 2015-11-23 | 2016-03-30 | 华帝股份有限公司 | Novel range hood volute |
CN106402973B (en) * | 2016-11-09 | 2019-04-26 | 华帝股份有限公司 | Range hood volute with noise reduction function |
CN110822505A (en) * | 2018-08-10 | 2020-02-21 | 佛山市顺德区美的洗涤电器制造有限公司 | Smoke exhaust ventilator |
CN114777181A (en) * | 2022-06-21 | 2022-07-22 | 杭州老板电器股份有限公司 | Variable double-cavity range hood |
CN114777181B (en) * | 2022-06-21 | 2022-09-20 | 杭州老板电器股份有限公司 | Variable double-cavity range hood |
Also Published As
Publication number | Publication date |
---|---|
ITRN20110040A1 (en) | 2012-12-01 |
EP2530388B1 (en) | 2015-10-14 |
PL2530388T3 (en) | 2016-03-31 |
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