U.S. patent application number 13/920512 was filed with the patent office on 2013-12-19 for cooking appliance.
This patent application is currently assigned to Samsung Electronics Co., Ltd.. The applicant listed for this patent is Samsung Electronics Co., Ltd.. Invention is credited to See Young Choi, Jong Hak Hyun, Sang Jin Jeong, Min Gyu Jung, Yong Hyun Kwon, Jung Hak Lee.
Application Number | 20130333685 13/920512 |
Document ID | / |
Family ID | 48672406 |
Filed Date | 2013-12-19 |
United States Patent
Application |
20130333685 |
Kind Code |
A1 |
Jeong; Sang Jin ; et
al. |
December 19, 2013 |
COOKING APPLIANCE
Abstract
A machine room cooling structure of an oven which relatively
enlarges the inner volume of a cooking room by lowering the height
of the machine room is provided. The machine room cooling structure
includes a fan forcibly blowing air of the machine room, a motor
driving the fan, an exhaust duct guiding air of the machine room to
an area in front of the oven, and a support bracket to install the
motor at a suction hole of the exhaust duct, the support bracket
includes a base unit, a motor combining unit on which a core of the
motor is placed, and bridge parts connecting the base unit and the
motor combining unit, and the motor combining unit is formed such
that the height of the lower end of the core is equal to or lower
than the height of the upper end of the exhaust duct.
Inventors: |
Jeong; Sang Jin; (Yongin-si,
KR) ; Kwon; Yong Hyun; (Yongin-si, KR) ; Lee;
Jung Hak; (Seoul, KR) ; Jung; Min Gyu;
(Suwon-si, KR) ; Choi; See Young; (Anyang-si,
KR) ; Hyun; Jong Hak; (Seoul, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Samsung Electronics Co., Ltd. |
Suwon-si |
|
KR |
|
|
Assignee: |
Samsung Electronics Co.,
Ltd.
Suwon-si
KR
|
Family ID: |
48672406 |
Appl. No.: |
13/920512 |
Filed: |
June 18, 2013 |
Current U.S.
Class: |
126/21A |
Current CPC
Class: |
F24C 15/322 20130101;
F24C 15/2007 20130101; F24C 15/006 20130101 |
Class at
Publication: |
126/21.A |
International
Class: |
F24C 15/32 20060101
F24C015/32 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 19, 2012 |
KR |
10-2012-0065357 |
Claims
1. A cooking appliance comprising: a cooking room to accommodate an
object to be cooked; a machine room provided above the cooking
room; an exhaust duct including a suction hole, which sucks in air
from the machine room, and a discharge hole, which discharges the
sucked air to an area in front of the machine room; a fan forcibly
blowing air of the machine room; a motor including a stator and a
rotor, provided above the fan and driving the fan, the stator
including a bobbin on which a coil is wound and a core forming a
magnetic field according to current applied to the coil; and a
support bracket which is provided at the suction hole, and which
supports the motor such that a height of a lower end of the core is
equal to or lower than a height of an upper end of the exhaust
duct.
2. The cooking appliance according to claim 1, wherein the support
bracket includes a base unit supported by the exhaust duct around
the suction hole, a motor combining unit separated from the base
part so that air passes through a gap between the base unit and the
motor combining unit, and bridge parts connecting the base unit and
the motor combining unit, wherein the bridge parts are formed
horizontally, or are inclined downwardly in a direction from the
base unit to the motor combining unit.
3. The cooking appliance according to claim 2, wherein the motor
combining unit includes a core support part on which the core is
mounted, and a core guide part extended upwardly from the core
support part so as to form an accommodation space accommodating the
core together with the core support part, wherein a height of an
upper end of the core support part is equal to or lower than the
height of the upper end of the exhaust duct.
4. The cooking appliance according to claim 3, wherein the base
unit includes a bell-mouthed part to prevent noise of air sucked
into the exhaust duct.
5. The cooking appliance according to claim 4, wherein the base
unit further includes a planar part extended horizontally to the
outside of the bell-mouthed part, and a curved part extended
upwardly from the planar part so as to have a gentle inclination
and placed on the exhaust duct.
6. The cooking appliance according to claim 1, wherein the radius
of the suction hole is greater than the radius of the fan.
7. The cooking appliance according to claim 1, wherein the support
bracket is integrally formed.
8. A cooking appliance comprising: a cooking room to accommodate an
object to be cooked; a machine room provided above the cooking
room; a fan forcibly blowing air of the machine room; a motor
including a stator and a rotor, provided above the fan and driving
the fan, the stator including a bobbin on which a coil is wound and
a core forming a magnetic field according to current applied to the
coil; and an exhaust duct to suck in air from the machine room and
to discharge the sucked air to an area in front of the machine
room, the exhaust duct including a motor combining unit which
supports the motor such that the height of the lower end of the
core is equal to or lower than the height of the upper end of the
exhaust duct.
9. The cooking appliance according to claim 8, wherein the exhaust
duct includes bridge parts supporting the motor combining unit,
wherein the bridge parts are formed horizontally, or are inclined
downwardly in a direction toward the motor combining unit.
10. The cooking appliance according to claim 8, wherein the motor
combining unit includes a core support part on which the core is
mounted, and a core guide part extended upwardly from the core
support part so as to form an accommodation space accommodating the
core together with the core support part, wherein a height of an
upper end of the core support part is equal to or lower than the
height of the upper end of the exhaust duct.
11. The cooking appliance according to claim 8, wherein the exhaust
duct includes a bell-mouthed part forming a suction hole.
12. The cooking appliance according to claim 8, wherein the exhaust
duct is integrally formed.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the priority benefit of Korean
Patent Application No. 10-2012-0065357, filed on Jun. 19, 2012 in
the Korean Intellectual Property Office, the disclosure of which is
incorporated herein by reference.
BACKGROUND
[0002] 1. Field
[0003] Embodiments relate to a machine room cooling structure of an
oven.
[0004] 2. Description of the Related Art
[0005] In general, an oven is a cooking appliance including a
cooking room, a heating apparatus generating heat, and a fan
circulating the heat generated from the heating apparatus to the
inside of the cooking room, and thus cooking an object to be
cooked.
[0006] A machine room is provided above the cooking room in which
various electronic components operating the oven are disposed, and
a machine room cooling apparatus preventing damage to the
electronic components due to heat from the cooking room is provided
in the machine room.
[0007] The machine room cooling apparatus may include an exhaust
duct sucking in air from the machine room and exhausting the sucked
air to an area in front of the oven, a fan forcibly blowing the air
of the machine room through the exhaust duct, and a motor driving
the fan.
[0008] In order to increase the capacity of the cooking room, the
height of the cooking room needs to be secured and a design to
relatively lower the height of the machine room is required.
SUMMARY
[0009] In an aspect of one or more embodiments, there is provided a
cooling structure of a machine room which relatively enlarges the
inner volume of a cooking room by slimming the machine room.
[0010] In an aspect of one or more embodiments, there is provided a
cooking appliance which includes a cooking room to accommodate an
object to be cooked, a machine room provided above the cooking
room, an exhaust duct including a suction hole, which sucks in air
from the machine room and a discharge hole, which discharges the
sucked air to an area in front of the machine room, a fan forcibly
blowing air of the machine room, a motor including a stator and a
rotor, provided above the fan and driving the fan, the stator
including a bobbin on which a coil is wound and a core forming a
magnetic field according to current applied to the coil, and a
support bracket which is provided at the suction hole, and which
supports the motor such that a height of a lower end of the core is
equal to or lower than a height of an upper end of the exhaust
duct.
[0011] The support bracket may include a base unit supported by the
exhaust duct around the suction hole, a motor combining unit
separated from the base part so that air passes through a gap
between the base unit and the motor combining unit, and bridge
parts connecting the base unit and the motor combining unit, and
the bridge parts may be formed horizontally or be inclined
downwardly in a direction from the base unit to the motor combining
unit.
[0012] The motor combining unit may include a core support part on
which the core is mounted and a core guide part extended upwardly
from the core support part so as to form an accommodation space
accommodating the core together with the core support part, and a
height of an upper end of the core support part may be equal to or
lower than the height of the upper end of the exhaust duct.
[0013] The base unit may include a bell-mouthed part to prevent
noise of air sucked into the exhaust duct.
[0014] The base unit may further include a planar part extended
horizontally to the outside of the bell-mouthed part, and a curved
part extended upwardly from the planar part so as to have a gentle
inclination and placed on the exhaust duct.
[0015] The radius of the suction hole may be greater than the
radius of the fan.
[0016] The support bracket may be integrally formed.
[0017] In an aspect of one or more embodiments, there is provided a
cooking appliance which includes a cooking room to accommodate an
object to be cooked, a machine room provided above the cooking
room, a fan forcibly blowing air of the machine room, a motor
including a stator and a rotor, provided above the fan and driving
the fan, the stator including a bobbin on which a coil is wound and
a core forming a magnetic field according to current applied to the
coil, and an exhaust duct to suck in air from the machine room and
to discharge the sucked air to an area in front of the machine
room, the exhaust duct including a motor combining unit which
supports the motor such that the height of the lower end of the
core is equal to or lower than the height of the upper end of the
exhaust duct.
[0018] The exhaust duct may include bridge parts supporting the
motor combining unit, and the bridge parts may be formed
horizontally or be inclined downwardly in a direction toward the
motor combining unit.
[0019] The motor combining unit may include a core support part on
which the core is mounted and a core guide part extended upwardly
from the core support part so as to form an accommodation space
accommodating the core together with the core support part, and a
height of an upper end of the core support part may be equal to or
lower than the height of the upper end of the exhaust duct.
[0020] The exhaust duct may include a bell-mouthed part forming a
suction hole.
[0021] The exhaust duct may be integrally formed.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] These and/or other aspects will become apparent and more
readily appreciated from the following description of embodiments,
taken in conjunction with the accompanying drawings of which:
[0023] FIG. 1 is a front view of an oven in accordance with an
embodiment;
[0024] FIG. 2 is a schematic longitudinal-sectional view of the
oven of FIG. 1;
[0025] FIG. 3 is an exploded perspective view of a machine room
cooling apparatus of the oven of FIG. 1;
[0026] FIG. 4 is a plan view of the machine room cooling apparatus
of the oven of FIG. 1;
[0027] FIG. 5 is a cross-sectional view taken along the line I-I of
FIG. 4;
[0028] FIG. 6 is a cross-sectional view taken along the line II-II
of FIG. 4;
[0029] FIG. 7 is a view illustrating flow of cool air in the
machine room cooling apparatus of FIG. 1; and
[0030] FIG. 8 is an exploded perspective view of a machine room
cooling apparatus of an oven in an embodiment.
DETAILED DESCRIPTION
[0031] Reference will now be made in detail to embodiments,
examples of which are illustrated in the accompanying drawings,
wherein like reference numerals refer to like elements
throughout.
[0032] FIG. 1 is a front view of an oven in an aspect of one or
more embodiments, and FIG. 2 is a schematic longitudinal-sectional
view of the oven of FIG. 1.
[0033] With reference to FIGS. 1 and 2, an oven 1 in an embodiment
includes an inner case 11 in which a cooking room 30 is formed, and
an outer case 10 connected to the outer surface of the inner case
11 and forming the external appearance of the oven 1.
[0034] The front surface of the cooking room 30 is opened so that
an object to be cooked may enter and exit the cooking room 30, and
the opened front surface of the cooling room 30 may be opened and
closed by a door 20. The door 20 may be rotatably hinged to the
lower portion of the inner case 11, and be provided with a handle
21 so as to be easily opened and closed.
[0035] The door 20 may include plural door glasses 22a, 22b, 22c
and 22d and a door frame 23 supporting the plural door glasses 22a,
22b, 22c and 22d, and a gap of a designated interval may be formed
between the plural door glasses 22a, 22b, 22c and 22d. These gaps
form channels 24a, 24b and 24c in which air flows, and air may flow
in the upward direction through the channels 24a, 24b and 24c.
[0036] Although this will be described in detail later, air passing
through a discharge hole 66 of an exhaust duct 60 located above the
channels 24a, 24b and 24c has relatively low pressure, and thus air
of the channels 24a, 24b and 24c may be sucked in the upward
direction due to a pressure difference and be discharged to an area
in front of the oven 1 together with air discharged from the
discharge hole 66 of the exhaust duct 60. Through such a
configuration, cooling of the door 20 may be executed.
[0037] Racks 32 on which an object to be cooked is placed may be
mounted in the cooking room 30. The racks 32 may be mounted on
guide rails 31 provided on both inner side surfaces of the inner
case 11 of the cooking room 30.
[0038] At least one heater 33 may be provided in the cooking room
30 so as to heat the object to be cooked. Further, circulation fans
35 circulating air of the cooking room 30 and circulation motors 34
to drive the circulation fans 35 may be provided in the rear
portion of the cooking room 30. A fan cover 36 to cover the
circulation fans 35 may be provided in front of the circulation
fans 35, and through holes 37 through which air flows may be formed
on the fan cover 36.
[0039] A control panel 41 displaying various operating information
of the oven 1 and inputting the operating information may be
provided at the upper portion of the front surface of the outer
case 10.
[0040] The oven 1 further includes a machine room 40 which may
accommodate various electronic components 42 and 43 (with reference
to FIG. 7) controlling the operation of the oven 1. The electronic
components 42 and 43 may include a display circuit board 42
controlling the control panel 41 and a main circuit board 43
controlling the operation of the heater 33 and the circulation
motors 34.
[0041] Such a machine room 40 may be provided above the cooking
room 30, and an adiabatic material 44 may be provided between the
cooking room 30 and the machine room 40.
[0042] Since the electronic components 42 and 43 of the machine
room 40 are very sensitive to heat, a machine room cooling
apparatus 50 cooling the machine room 40 by circulating air of the
machine room 40 may be provided in the machine room 40.
[0043] The machine room cooling apparatus 50 includes the exhaust
duct 60 sucking in air from the machine room 40 and exhausting the
air to the area in front of the oven 1, a fan 70 forcibly blowing
the air of the machine room 40, a motor 80 to drive the fan 70, and
a support bracket 90 to support the motor 80.
[0044] A suction hole 65 to suck air is formed on the upper portion
of the exhaust duct 60, and the discharge hole 66 to discharge air
is formed on the front portion of the exhaust duct 60. The
discharge hole 66 may discharge air to the area in front of the
oven 1. Through such a configuration, the machine room cooling
apparatus 50 may cool the machine room 40 by sucking in air from
the machine room 40 and discharging the sucked air to the area in
front of the oven 1.
[0045] Here, the exhaust duct 60 may be formed in a venturi pipe
type having the height which is gradually lowered in the forward
direction of the oven 1 and the cross-sectional area which is
gradually decreased in the forward direction of the oven 1.
Therefore, the speed of air in the exhaust duct 60 may be raised
and the pressure of the air in the exhaust duct 60 may be decreased
in the forward direction of the oven 1.
[0046] Such a machine room cooling apparatus 50 may occupy most of
the height of the machine room 40, as shown in FIG. 2. Therefore,
in order to increase the capacity of the cooking room 30 while
uniformly maintaining the overall height of the oven 1, lowering of
the height of the machine room cooling apparatus 50 is
required.
[0047] The machine room cooling apparatus 50 of the oven 1 in
accordance with an embodiment is designed to achieve this
objective, and a detailed configuration thereof will be described
in detail below.
[0048] FIG. 3 is an exploded perspective view of the machine room
cooling apparatus of the oven of FIG. 1, FIG. 4 is a plan view of
the machine room cooling apparatus of the oven of FIG. 1, FIG. 5 is
a cross-sectional view taken along the line I-I of FIG. 4, FIG. 6
is a cross-sectional view taken along the line II-II of FIG. 4, and
FIG. 7 is a view illustrating flow of cool air in the machine room
cooling apparatus of FIG. 1.
[0049] With reference to FIGS. 3 to 7, the machine room cooling
apparatus 50 in an embodiment includes the exhaust duct 60 guiding
air of the machine room 40 to the area in front of the oven 1, the
fan 70 forcibly blowing the air of the machine room 40, the motor
80 to drive the fan 70, and the support bracket 90 to support the
motor 80.
[0050] The exhaust duct 60 includes a scroll part 63, the radius of
which is gradually increased in the clockwise direction, and a
discharge part 64 formed at the rear portion of the scroll part 63.
The suction hole 65 through which air is sucked into the exhaust
duct 60 is formed on the upper portion of the scroll part 63, and
the discharge hole 66 through which air is discharged to the
outside of the exhaust duct 60 is formed on the discharge part 64.
Therefore, air sucked into the exhaust duct 60 through the suction
hole 65 formed on the upper portion of the exhaust duct 60 may be
guided to the discharge part 64 by the scroll part 63 and be
discharged to the area in front of the oven through the discharge
hole 66. Further, the discharge part 64 may be formed such that the
height of the discharge part 64 is gradually lowered and the
cross-sectional area of the discharge part 64 is gradually
decreased in the direction toward the discharge hole 66 so as to
exhibit venturi effects.
[0051] The fan 70 may be a centrifugal fan or a turbo fan which
sucks air at the upper portion thereof and discharges air in the
radial direction. The fan 70 may be disposed at the inside of the
exhaust duct 60. The fan 70 may include a rotary plate 71, a hub 72
protruding upwardly from the center of the rotary plate 71, plural
blades 73 formed inwardly from the edge of the rotary plate 71, and
a shroud 74 connecting the tips of the upper ends of the plural
blades 73.
[0052] The hub 72 may be formed in a conical shape, the radius of
which is increased in the downward direction, and may diffuse air
sucked through the upper portion thereof in the radial direction.
The air diffused in the radial direction by the hub 72 may be
discharged to the plural blades 73 in the radial direction of the
fan 70.
[0053] The motor 80 generates rotating force to drive the fan 70,
and may include a stator 82 and a rotor 81. The stator 82 may
include a bobbin 85 on which a coil 86 is wound, and a core 83
generating a magnetic field when current is applied to the coil 86.
The rotor 81 may be rotated in one direction by the magnetic field
formed by the core 83. One end of a rotary shaft 87 is connected to
the rotor 81, and the rotary shaft 87 may be rotated together with
the rotor 81. The other end of the rotary shaft 87 is connected to
the fan 70.
[0054] Such a motor 80 may be supported by the support bracket 90.
The support bracket 90 may include a base unit 97 supported by the
exhaust duct 60 around the suction hole 65, a motor combining unit
91 separated from the base part 97 and combined with the motor 80,
and bridge parts 96 connecting the base unit 97 and the motor
combining unit 91.
[0055] The base unit 97 may have an almost donut shape and be
combined with the exhaust duct 60 around the suction hole 65. The
base unit 97 may include a bell-mouthed part 98 forming an inner
suction hole 98a through which air is sucked into the exhaust duct
60. The bell-mouthed part 98 has an almost arc-shaped
cross-section, and may prevent formation of a vortex of air
introduced into the exhaust duct 60 and thus reduce noise.
[0056] A planar part 99a extended almost horizontally may be
provided at the outside of the bell-mouthed part 98, and a curved
part 99b gently inclined may be provided at the outside of the
planar part 99a. The support bracket 90 may be supported by the
exhaust duct 60 by placing the curved part 99b on the exhaust duct
60 around the suction hole 65.
[0057] Fixing protrusions 90a protruded downwardly are formed on
the support bracket 90, fixing holes 60a into which the fixing
protrusions 90a are inserted are formed on the exhaust duct 60, and
the support bracket 90 may be combined with the exhaust duct 60 by
inserting the fixing protrusions 90a into the fixing holes 60a.
[0058] As shown in FIGS. 5 and 6, the radius R1 of the suction hole
65 of the exhaust duct 60 may be greater than the radius R2 of the
fan 70 in consideration of a space in which the base unit 97 will
be disposed.
[0059] The motor combining unit 91 may include a core support part
92 on which the core 83 of the motor 80 is mounted, and a core
guide part 94 extended upwardly from the edge of the core support
part 92. The core guide part 94 may have three surfaces except for
the surface with which the bobbin 85 of the motor 80 is combined.
The core support part 92 and the core guide part 94 may form an
accommodation space 95 accommodating the core 83.
[0060] Fastening holes 83a may be formed on the stator 83 of the
motor 82, and fastening holes 92a corresponding to the fastening
holes 83a may be formed on the core support part 92 of the motor
combining unit 91. Therefore, the motor 82 may be firmly fastened
to the motor combining unit 91 by inserting fastening members, such
as screws, into the fastening holes 83a and the fastening holes
92a.
[0061] Since the base unit 97 and the motor combining unit 91 are
separated from each other, as described above, the support bracket
90 may include the bridge parts 96 connecting the base unit 91 and
the motor combining unit 91. Although this embodiment describes
four bridge parts 96, the number of the bridge parts 96 is not
limited thereto but rather may be less than three or more than
five.
[0062] As shown in FIGS. 5 and 6, the height H2 of the lower end 84
of the motor core 83 combined with the motor combining unit 91 may
be equal to or lower than the height H1 of the upper end 61 of the
exhaust duct 60.
[0063] Here, the heights H1 and H2 are set based on a bottom
surface 45 of the machine room, but may be set based on the bottom
surface supporting the oven.
[0064] Further, as shown in FIG. 6, the bridge parts 90 may be
formed horizontally so that the height H2 of the lower end 84 of
the motor core 83 is equal to or lower than the height H1 of the
upper end 61 of the exhaust duct 60. Otherwise, although not shown
in the drawings, the bridge parts 90 may be inclined downwardly in
a direction from the base unit 97 to the motor combining unit
91.
[0065] As described above, by disposing the motor core 83 such that
the height H2 of the lower end 84 of the motor core 83 is equal to
or lower than the height H1 of the upper end 61 of the exhaust duct
60, the height of the machine room cooling apparatus 50 occupying
most of the height of the machine room 40 may be generally lowered.
Therefore, the height of the machine room 40 may be lowered, and
the capacity of the cooking room 30 may be increased by increasing
the height of the cooking room 30 as much as the lowered height of
the machine room 40.
[0066] Further, by disposing the motor core 83 such that the height
H2 of the lower end 84 of the motor core 83 is equal to or lower
than the height H1 of the upper end 61 of the exhaust duct 60, the
motor 80 and the fan 70 may be close to each other, and thus
cooling of the motor 80 may be more effectively carried out.
[0067] Since the motor core 83 is placed on the core support part
92 of the motor combining unit 91, the height H2 of the upper end
93 of the core support part 92 may be equal to the height H2 of the
lower end 84 of the motor core 83 combined with the motor combining
unit 91. Therefore, in accordance with an embodiment, the height H2
of the upper end 93 of the core support part 92 may be equal to or
lower than the height H1 of the upper end 61 of the exhaust duct
60.
[0068] Such a support bracket 90 including the base unit 97, the
motor combining unit 91 and the bridge parts 96 may be integrally
formed. The support bracket 90 may be integrally formed by
injection molding using a resin material.
[0069] FIG. 8 is an exploded perspective view of a machine room
cooling apparatus of an oven in accordance with an embodiment.
[0070] With reference to FIG. 8, a machine room cooling apparatus
150 of an oven in accordance with an embodiment will be described.
A description of components which are substantially the same as an
embodiment in FIG. 2, for example, will be omitted for
convenience.
[0071] The machine room cooling apparatus 150 in accordance with an
embodiment includes a fan 180 forcibly blowing air of a machine
room, a motor 190 driving the fan 180, and an exhaust duct 160
guiding air of the machine room.
[0072] The fan 180 has the same configuration as the fan 70 in
accordance with an embodiment shown in FIG. 3, for example, and a
detailed description thereof will thus be omitted. The motor 190
also has the same configuration as the motor 80 in accordance with
an embodiment shown in FIG. 3, and a detailed description thereof
will thus be omitted.
[0073] The exhaust duct 160 includes a scroll part 163, the radius
of which is gradually increased in the clockwise direction, and a
discharge part 164 formed at the rear portion of the scroll part
163. A suction hole 165 through which air is sucked into the
exhaust duct 160 may be formed on the upper portion of the scroll
part 163, and a discharge hole 166 may be formed at the end of the
discharge part 164. Therefore, air sucked into the exhaust duct 160
through the suction hole 165 on the upper portion of the exhaust
duct 160 may be guided to the discharge part 164 by the scroll part
163 and be discharged to the outside of the exhaust duct 160
through the discharge hole 166.
[0074] A motor combining unit 167 may include a core support part
168 on which a core 193 of the motor 190 is mounted, and a core
guide part 170 extended upwardly from the edge of the core support
part 168. The core support part 168 and the core guide part 170 may
form an accommodation space accommodating the core 193 of the motor
190.
[0075] Fastening holes 168a may be formed on the core support part
168, fastening holes 193a may be formed on the core 193 of the
motor 190, and the motor 190 may be firmly fastened to the motor
combining unit 167 by inserting fastening members, such as screws,
into the fastening holes 168a and the fastening holes 193a.
[0076] The height of the upper end of the core support part 168 may
be equal to or lower than the height of the upper end of the
exhaust duct 160. Therefore, the height of the lower end of the
motor core 193 placed on the core support part 168 may also be
equal to or lower than the height of the upper end of the exhaust
duct 160. The effects thereby are equal to those of an embodiment
shown in FIG. 2, for example, and a detailed description will thus
be omitted.
[0077] Further, a bell-mouthed part 173 forming the suction hole
165 and bridge parts 172 supporting the motor combining unit 167
may be provided on the exhaust duct 160.
[0078] The bell-mouthed part 173 has an almost arc-shaped
cross-section, and may prevent formation of a vortex of air passing
through the suction hole 165 and thus reduce noise. A planar part
174a extended almost horizontally may be provided at the outside of
the bell-mouthed part 173, and a curved part 174b gently inclined
may be provided at the outside of the planar part 174a.
[0079] One end of each of the bridge parts 172 is connected to the
bell-mouthed part 173, the other end of each of the bridge parts
172 is connected to the motor combining unit 167, and thus the
bridge parts 172 may support the motor combining unit 167. Here,
plural bridge parts 172 may be provided. The bridge parts 172 may
be formed almost horizontally, or be inclined downwardly in a
direction from the bell-mouthed part 173 to the motor combining
unit 167.
[0080] Such an exhaust duct 160 including the motor combining unit
167, the bell-mouthed part 173 and the bridge parts 172 may be
integrally formed. The exhaust duct 160 may be formed by injection
molding using a resin material.
[0081] As is apparent from the above description, a cooking
appliance in accordance with an embodiment slims a machine room and
may thus provide an oven designed such that the capacity of a
cooking room is increased.
[0082] Further, a motor and a fan are disposed close to each other,
and thus cooling of the motor itself may be effectively
executed.
[0083] Further, a bell-mouthed part is provided at a suction hole
of an exhaust duct, and thus noise may be reduced.
[0084] Although a few embodiments have been shown and described, it
would be appreciated by those skilled in the art that changes may
be made in these embodiments without departing from the principles
and spirit of the disclosure, the scope of which is defined in the
claims and their equivalents.
* * * * *