CN108354466B - Cooking device fan and cooking device - Google Patents
Cooking device fan and cooking device Download PDFInfo
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- CN108354466B CN108354466B CN201810404790.8A CN201810404790A CN108354466B CN 108354466 B CN108354466 B CN 108354466B CN 201810404790 A CN201810404790 A CN 201810404790A CN 108354466 B CN108354466 B CN 108354466B
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- fan
- inner ring
- outer ring
- ring fan
- cooking device
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
- A47J37/0629—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements
- A47J37/0641—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements with forced air circulation, e.g. air fryers
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a fan of a cooking device and the cooking device, wherein the fan of the cooking device comprises: the fan comprises an inner ring fan blade and an outer ring fan blade, wherein the outer ring fan blade is positioned at the radial outer end of the inner ring fan blade, the inner ring fan blade and the outer ring fan blade are positioned at the same side of the rotating plane of the fan, and the inner ring fan blade and the outer ring fan blade are bent towards opposite directions relative to the rotating plane of the fan. According to the fan of the cooking device, the inner ring blowing and the outer ring air suction are realized by a single fan, so that the hot air circulation in the cooking device is realized conveniently.
Description
Technical Field
The invention belongs to the technical field of manufacturing of cooking appliances, and particularly relates to a fan of a cooking device and the cooking device with the fan.
Background
In order to make the temperature in the cavity more uniform in the cooking device, so that the food is heated more uniformly, the cooking device generally has a hot air convection function. The hot air convection function is realized by a hot air convection device. The hot air convection device comprises a hot air cavity, a heater, hot air fan blades and a hot air motor. The hot air fan blade is connected with the shaft of the hot air motor, and the hot air fan blade and the heater are arranged in the hot air cavity.
The heater in the related art is arranged around the fan blades, and when the hot air motor works, the hot air motor drives the hot air fan blades to rotate, the rotating surface of the hot air fan blades is perpendicular to the direction of the rotating shaft of the hot air fan blades, the hot air fan blades blow air to the periphery, heat of the heater is blown into the cavity of the cooking device, and food is heated in the cavity. The specific working process is that the hot air fan of the hot air convection device sucks normal temperature air in the axial direction, blows the normal temperature air to the heater for heating, then sends the air into the cavity of the cooking device for heating food, and the heated air is discharged out of the cooking device through holes and seams of the cavity. In the process, the cooking device continuously sucks normal-temperature air for heating, sends the air into the cavity for working, and then discharges the air out of the cavity. This is a unidirectional irreversible process, repeated continuously, without heat build-up and superposition effects. Therefore, when the hot air convection device works, the highest temperature in the cavity cannot break through the current maximum value, and the continuously discharged hot air can cause the overall temperature rise of the cooking device to exceed the standard, so that the service life of the cooking device can be influenced by the overhigh temperature rise of a computer board, and the experience effect can be influenced by the overhigh temperature of a user interface.
The hot air convection device in the related art mainly has the following two problems: 1) The hottest air generated by heating of the heater enters the cavity along the cavity wall, heat is conducted to the cavity wall, part of heat is dissipated by air flowing back to the central area of the cavity, the hottest air is not generated, and the central temperature is not the highest temperature; 2) The heat dissipated by the hottest air from the cavity wall and the gaps is larger, which can lead to higher temperature rise of peripheral devices of the cooking device.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a fan of a cooking device, which can realize inner ring blowing and outer ring air suction.
According to an embodiment of the invention, a fan of a cooking apparatus includes: the fan comprises an inner ring fan blade and an outer ring fan blade, wherein the outer ring fan blade is positioned at the radial outer end of the inner ring fan blade, the inner ring fan blade and the outer ring fan blade are positioned at the same side of the rotating plane of the fan, and the inner ring fan blade and the outer ring fan blade are bent towards opposite directions relative to the rotating plane of the fan.
According to the fan of the cooking device, the inner ring blowing and the outer ring air suction are realized by the single fan, so that the hot air circulation in the cooking device is realized conveniently.
According to the fan of the cooking device of one embodiment of the present invention, an included angle between the inner ring fan blade and the rotation plane is α, and an included angle between the outer ring fan blade and the rotation plane is β, which satisfies: alpha is more than or equal to 30 degrees and less than or equal to 40 degrees, beta is more than or equal to 30 degrees and less than or equal to 40 degrees.
A fan of a cooking apparatus according to an embodiment of the present invention satisfies: alpha > beta.
A fan of a cooking apparatus according to an embodiment of the present invention satisfies: alpha-beta is more than or equal to 3 degrees and less than or equal to 7 degrees.
According to the fan of the cooking device, according to one embodiment of the invention, the radial length of the inner ring fan blade is L1, the radial length of the outer ring fan blade is L2, and the following conditions are satisfied: L1/L2 is less than or equal to 3/1 and less than or equal to 4/1.
According to the fan of the cooking device, the width of the inner ring fan blade is gradually increased from inside to outside along the radial direction.
According to the fan of the cooking device, the inner ring fan blades and the outer ring fan blades are radially spaced and staggered in the circumferential direction.
The fan of the cooking apparatus according to an embodiment of the present invention further comprises: the support piece, the radial extension of support piece, inner circle flabellum with outer lane flabellum all with the support piece links to each other, and is located respectively the both sides of support piece.
The fan of the cooking apparatus according to an embodiment of the present invention further comprises: the wheel hub, the backing sheet is a plurality of, and is a plurality of the backing sheet is followed wheel hub's circumference is spaced apart to be arranged, the inner circle flabellum with outer lane flabellum is a plurality of, a plurality of the inner circle flabellum, a plurality of outer lane flabellum, a plurality of the backing sheet one-to-one.
According to the fan of the cooking device, the supporting plate, the inner ring fan blades and the outer ring fan blades are integrally formed, the supporting plate is provided with the first process grooves at the connection positions of the inner ring fan blades and the radial inner ends and the radial outer ends, and the supporting plate is provided with the second process grooves at the connection positions of the supporting plate and the radial inner ends of the outer ring fan blades.
The invention also proposes a cooking device comprising: a hot air cavity, a heater and a fan according to any one of claims 1-9, wherein the heater and the fan are both arranged in the hot air cavity, and the heater is arranged opposite to the blowing surface of the inner ring fan blade.
The cooking device has the same advantages as the fan described above with respect to the prior art, and will not be described in detail herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is an exploded view of a cooking apparatus according to an embodiment of the present invention;
fig. 2 is a schematic view of hot air circulation of a cooking apparatus according to an embodiment of the present invention;
FIG. 3 is an isometric view of a fan according to an embodiment of the present invention;
FIG. 4 is a front view of a fan according to an embodiment of the present invention;
FIG. 5 is a side view of a fan according to an embodiment of the present invention;
FIG. 6 is a front view of a single blade of a fan according to an embodiment of the present invention;
FIG. 7 is a side view of a single blade of a fan according to an embodiment of the present invention.
Reference numerals:
the cooking device 100 is configured such that,
fan 10, inner ring blade 11, blowing face 11a of inner ring blade, suction face 11b of inner ring blade, outer ring blade 12, blowing face 12a of outer ring blade, suction face 12b of outer ring blade, supporting piece 13, first process groove 14, second process groove 15, hub 16, rotation plane 17,
the heater 20 is provided with a heater,
a cavity back plate 31, a hot air cover 32, a hot air cavity 33, a driving unit 34 and a cooking cavity 35.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 2, a cooking apparatus 100 according to an embodiment of the present invention is described, and the cooking apparatus 100 may be a food processor such as an electric oven.
As shown in fig. 1 and 2, a cooking apparatus 100 according to an embodiment of the present invention includes: a cavity cover, a hot air cover 32, a heater 20, a fan 10, and a driving unit 34.
Wherein, the cavity cover defines the cooking cavity 35, the front end of cooking cavity 35 can open, and realize opening and closing of cooking cavity 35 through the cooperation with the door body, hot-blast cover 32 installs in the rear of cavity cover, and hot-blast cover 32 and cavity back plate 31 of cavity cover jointly prescribe a limit to hot-blast cavity 33, heater 20 and fan 10 are all installed in hot-blast cavity 33, drive unit 34 can install in the outside of hot-blast cover 32 (outside hot-blast cavity 33), drive unit 34 can include the motor, the motor passes through the shaft coupling and links to each other with fan 10, heater 20 installs between fan 10 and cavity back plate 31, and heater 20 is just right with the center of fan 10, heater 20 can be the heating tube.
The fan 10 of the cooking apparatus 100 according to the embodiment of the present invention is described below with reference to fig. 3 to 7.
As shown in fig. 3 to 5, the fan 10 includes an inner ring fan blade 11 and an outer ring fan blade 12, the outer ring fan blade 12 is located at a radially outer end of the inner ring fan blade 11, for example, the inner ring fan blade 11 and the outer ring fan blade 12 are all plural, the plural inner ring fan blades 11 are uniformly spaced apart in a circumferential direction, the plural outer ring fan blades 12 are uniformly spaced apart in the circumferential direction, and the plural outer ring fan blades 12 are surrounded at a radially outer end of the inner ring fan blade 11.
The outer ring fan blades 12 are located at the radially outer ends of the inner ring fan blades 11, which does not mean that the outer ring fan blades 12 are located opposite to the inner ring fan blades 11 in the circumferential direction, and the outer ring fan blades 12 and the inner ring fan blades 11 are arranged in a staggered manner in the circumferential direction.
As shown in fig. 3 and 7, the inner ring fan blades 11 and the outer ring fan blades 12 are located on the same side of the rotation plane 17 of the fan 10, and the inner ring fan blades 11 and the outer ring fan blades 12 are bent in opposite directions with respect to the rotation plane 17 of the fan 10, in other words, the side surfaces of the inner ring fan blades 11 are disposed opposite to the side surfaces of the outer ring fan blades 12.
It will be appreciated that the fan 10 of this structural form may implement that the blowing direction of the inner ring fan blade 11 is opposite to the blowing direction of the outer ring fan blade 12, as shown in fig. 7, the blowing surface 11a of the inner ring fan blade 11 and the suction surface 12b of the outer ring fan blade 12 face the cooking cavity 35, and the suction surface 11b of the inner ring fan blade 11 and the blowing surface 12a of the outer ring fan blade 12 face away from the cooking cavity 35.
As shown in fig. 2, the inner ring fan blades 11 have a blowing effect to blow air heated by the heater 20 into the cooking cavity 35, and the heater 20 is disposed opposite to the blowing surface of the inner ring fan blades 11, so that hot air is blown toward the middle of the cooking cavity 35, and the outer ring fan blades 12 are not disposed opposite to the heater 20. The outer ring fan blades 12 can suck air from the cooking cavity 35, and the air heated by the food in the cooking cavity 35 is sucked back into the hot air cavity 33 for reheating.
The hot air circulates in the cooking cavity 35 and the hot air cavity 33, so that the hot air after working is returned to the hot air cavity 33 to be heated continuously. Not only can reduce the heat air after the work is completed and escape to the outside of the cavity to cause the temperature rise to exceed the standard, but also can enable the hot air to continuously heat, so that the working temperature of the cooking cavity 35 is improved more efficiently, and the working efficiency of convection of the hot air is higher.
That is, the wind blown to the central region of the cooking cavity 35 is the hottest wind, so that the highest temperature of the central region of the cooking cavity 35 can be further increased; the secondary hot air after being heated is sucked into the fan 10 along the cooking cavity wall again, so that the secondary hot air is reused, the power consumption is reduced, the dissipation of the hot air from gaps is reduced, the heat loss is small, and the temperature rise of peripheral components of the cooking device 100 is small.
By providing the fan 10, the hot air is effectively reduced to heat the side wall of the cooking cavity 35, and meanwhile, the most hot air enters the cooking cavity 35 from the center during the hot air circulation heating, so that the heat can be more effectively utilized, and the working temperature in the cooking cavity 35 can be more quickly increased.
Table 1 comparative testing of center temperature with different fans
| t | Ordinary fan | Fan of the present disclosure |
| 600 | 230.087 | 249.571 |
| 601 | 230.101 | 249.897 |
| 602 | 230.612 | 248.777 |
| 603 | 230.464 | 249.796 |
| 604 | 230.52 | 249.291 |
| 605 | 230.951 | 249.228 |
| 606 | 230.648 | 247.832 |
| 607 | 230.262 | 247.345 |
| 608 | 230.342 | 246.835 |
| 609 | 230.764 | 246.276 |
| max | 230.951 | 249.897 |
According to the fan 10 of the cooking apparatus 100 of the embodiment of the present invention, the single fan 10 realizes the inner ring blowing and the outer ring suction, so that the hot air circulation in the cooking apparatus 100 is facilitated.
According to the cooking device 100 provided by the embodiment of the invention, circulation of hot air from the inner ring to the outer ring can be realized, the temperature of the central area of the cooking cavity 35 is high, the heat utilization rate is high, the heat dissipation is less, the temperature rise of peripheral parts of the cooking device 100 is less, and the service life is long.
In some embodiments, as shown in fig. 3-7, the fan 10 may further include: the support piece 13, the radial extension of support piece 13, inner circle flabellum 11 and outer lane flabellum 12 all link to each other with support piece 13, and inner circle flabellum 11 and outer lane flabellum 12 are located the both sides of support piece 13 respectively. That is, the inner ring fan blades 11 and the outer ring fan blades 12 are connected to the hub 16 at the center through the same supporting plate 13, so that the structure of the fan 10 can be simplified and the flow area can be increased.
As shown in fig. 3-7, the fan 10 may further include: the hub 16 and the plane where the hub 16 is located can be a rotation plane 17, the number of the supporting sheets 13 is multiple, the supporting sheets 13 are arranged at intervals along the circumferential direction of the hub 16, the number of the inner ring fan blades 11 and the number of the outer ring fan blades 12 are multiple, and the multiple inner ring fan blades 11, the multiple outer ring fan blades 12 and the multiple supporting sheets 13 are in one-to-one correspondence.
As shown in fig. 3 to 7, the supporting piece 13, the inner ring fan blade 11 and the outer ring fan blade 12 are formed as a whole, the supporting piece 13 is provided with a first process groove 14 at the connection position with the radial inner end and the radial outer end of the inner ring fan blade 11, and the supporting piece 13 is provided with a second process groove 15 at the connection position with the radial inner end of the outer ring fan blade 12.
It will be appreciated that during processing, the inner ring blade 11 and the outer ring blade 12 may be formed by bending, the first process groove 14 is used for preventing the inner ring blade 11 from breaking when bending, the second process groove 15 is used for preventing the outer ring blade 12 from breaking when bending, and the radially outer end of the outer ring blade 12 may be flush with the radially outer end of the supporting piece 13, so that the power of the fan 10 may be increased within a limited size.
In some embodiments, as shown in FIG. 7, inner ring blade 11 is radially spaced from outer ring blade 12, such as by a middle section of support tab 13 that is not connected to inner ring blade 11 nor to outer ring blade 12. That is, the distance from the radially outer end of the inner ring fan blade 11 to the rotation axis of the fan 10 is smaller than the distance from the radially inner end of the outer ring fan blade 12 to the rotation axis of the fan 10, so that the interference between the air blowing of the inner ring fan blade 11 and the air suction of the outer ring fan blade 12 can be reduced, and the air suction and blowing efficiency of the fan 10 can be improved.
As shown in fig. 3 and 7, the included angle between the inner ring fan blade 11 and the rotation plane 17 is α, and the included angle between the outer ring fan blade 12 and the rotation plane 17 is β, which satisfies the following conditions: alpha is more than or equal to 30 degrees and less than or equal to 40 degrees, beta is more than or equal to 30 degrees and less than or equal to 40 degrees. It will be appreciated that the inner and outer ring blades 11, 12 are at substantially the same angle to the plane of rotation 17, which ensures that the blowing and suction speeds remain consistent.
The inventors have found through extensive experimentation that when α > β, the air volume and the air suction volume are substantially the same, and in some embodiments, 3 ° or less α - β or less than 7 °, such as α - β=5°, where the air velocity and the air suction velocity remain the same, and the air volume circulation is the best.
As shown in fig. 6, the radial length of the inner ring fan blade 11 is L1, and the radial length of the outer ring fan blade 12 is L2, which satisfies the following conditions: L1/L2 is less than or equal to 3/1 and less than or equal to 4/1.
It will be appreciated that there are two effects of air in the process of being disturbed by the fan: 1) Air flows along the centrifugal direction; 2) The outer ring of blades 12 has a greater linear velocity than the inner ring when the blades rotate at the same angular velocity. By setting the length ratio of the inner ring fan blades 11 and the outer ring fan blades 12, the blowing air quantity and the air suction quantity can be basically consistent, and the ratio is the best ratio of air quantity circulation.
As shown in fig. 6, the width of the inner ring fan blades 11 gradually increases from inside to outside in the radial direction, so that the middle of the wind direction can be concentrated. And the air supply efficiency is enhanced.
The cross section of the inner ring fan blade 11 can be in a straight plate shape or in an arc shape, and the cross section of the outer ring fan blade 12 can be in a straight plate shape or in an arc shape. When the inner ring fan blades 11 or the outer ring fan blades 12 are designed to be arc-shaped, the air suction surface is convex, the pressure surface is concave, and when the arch height range is 0 mm-7 mm, for example, 4mm, the working efficiency of the fan blades is highest.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. A fan of a cooking device, comprising: the inner ring fan blades and the outer ring fan blades are positioned at the radial outer ends of the inner ring fan blades, the inner ring fan blades and the outer ring fan blades are positioned at the same side of the rotation plane of the fan, and the inner ring fan blades and the outer ring fan blades are bent in opposite directions relative to the rotation plane of the fan;
the width of the inner ring fan blade gradually increases from inside to outside along the radial direction; the inner ring fan blades and the outer ring fan blades are radially spaced apart and staggered in the circumferential direction;
further comprises: the support piece extends along the radial direction, and the inner ring fan blades and the outer ring fan blades are connected with the support piece and are respectively positioned at two sides of the support piece;
further comprises: the wheel hub, the backing sheet is a plurality of, and is a plurality of the backing sheet is followed wheel hub's circumference is spaced apart to be arranged, the inner circle flabellum with outer lane flabellum is a plurality of, a plurality of the inner circle flabellum, a plurality of outer lane flabellum, a plurality of the backing sheet one-to-one.
2. The fan of claim 1, wherein an angle between the inner ring fan blade and the rotation plane is α, and an angle between the outer ring fan blade and the rotation plane is β, which satisfies: alpha is more than or equal to 30 degrees and less than or equal to 40 degrees, beta is more than or equal to 30 degrees and less than or equal to 40 degrees.
3. A fan of a cooking device according to claim 2, characterized in that: alpha > beta.
4. A fan of a cooking device according to claim 2, characterized in that: alpha-beta is more than or equal to 3 degrees and less than or equal to 7 degrees.
5. The fan of claim 1, wherein the inner ring of blades has a radial length L1 and the outer ring of blades has a radial length L2, satisfying: L1/L2 is less than or equal to 3/1 and less than or equal to 4/1.
6. The fan of a cooking device according to claim 1, wherein the support piece, the inner ring fan blade and the outer ring fan blade are integrally formed, the support piece is provided with a first process groove at a connection with a radially inner end and a radially outer end of the inner ring fan blade, and the support piece is provided with a second process groove at a connection with a radially inner end of the outer ring fan blade.
7. A cooking device, comprising: a hot air cavity, a heater and the fan according to any one of claims 1-5, wherein the heater and the fan are both arranged in the hot air cavity, and the heater is arranged opposite to the blowing surface of the inner ring fan blade.
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| CN201810404790.8A CN108354466B (en) | 2018-04-28 | 2018-04-28 | Cooking device fan and cooking device |
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| KR20060120842A (en) * | 2005-05-23 | 2006-11-28 | 삼성전자주식회사 | Heat cooker with double convection fan |
| KR20060125294A (en) * | 2005-06-02 | 2006-12-06 | 삼성전자주식회사 | Oven |
| JP2007003042A (en) * | 2005-06-22 | 2007-01-11 | Hitachi Appliances Inc | Cooker |
| JP2007182816A (en) * | 2006-01-10 | 2007-07-19 | Matsushita Electric Ind Co Ltd | Ceiling fan |
| KR20100002093A (en) * | 2008-06-24 | 2010-01-06 | 가부시끼가이샤 도시바 | Heating cooker |
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| DE102010017347A1 (en) * | 2010-06-11 | 2011-12-15 | Rational Ag | Cooking device impeller, particularly cooking device radial impeller, for conveying fluid within inner chamber of cooking device, particularly hot air steamer, has multiple impeller blades that are rotatable around rotating axis |
| CN202789715U (en) * | 2011-09-05 | 2013-03-13 | 松下电器产业株式会社 | Centrifugal fan device, blade for device and electronic equipment provided with device |
| KR20160093858A (en) * | 2015-01-30 | 2016-08-09 | (주) 에너텍 | Convection oven |
| CN205383671U (en) * | 2016-02-26 | 2016-07-13 | 胡金治 | Control centrifugal wind wheel of two -way turbine |
| CN206166699U (en) * | 2016-06-23 | 2017-05-17 | 九阳股份有限公司 | Air frying pan |
| CN107202347A (en) * | 2017-06-20 | 2017-09-26 | 广东美的厨房电器制造有限公司 | Cooking equipment and its hot blast component |
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