Note: Descriptions are shown in the official language in which they were submitted.
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EXHAUST APPARATUS FOR COOKING AND MOUNTING METHOD THEREOF
BACKGROUND OF THE INVENTION
Field of the Invention:
This invention relates to an exhaust apparatus for
cooking and a method for mounting the exhaust apparatus.
Description of the Related Art:
In a conventional cooking exhaust apparatus used in a
multistoried dwelling house, a smoke collecting hood which opens
out downwardly is arranged just above a gas range of a cooking
equipment, and an exhaust blower is mounted within the smoke
collecting hood. Therefore, it has been difficult to draw smoke
uniformly from the whole area of the downward opening of the
hood into the exhaust blower.
In order to dissolve this problem, it needs to enlarge
the capacity of the exhaust blower or to provide a means for
making a convection of smoke under a smoke inlet of the exhaust
blower in the smoke collecting hood.
However, this results in the reduction of the drawing
power of the exhaust blower and smoke cannot be sufficiently
exhausted. .
SUMMARY OF THE INVENTION
It is an object of this invention to provide a cooking
exhaust apparatus which can collect smoke with high efficiency
and high safety for use in a kitchen of a multistoried dwelling
house or a detached house.
It is another object of this invention to provide a
method for easily and quickly mounting the above-described
cooking exhaust apparatus in place of an existing conventional
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exhaust apparatus.
To achieve the above object, a cooking exhaust
apparatus according to the present invention comprises a smoke
collecting hood arranged just above a range of a cooking
equipment; an exhaust blower connected to the upper portion of
said smoke collecting hood for exhausting smoke generated by the
range and collected by said smoke collecting hood; and an air
chamber interposed between said smoke collecting hood and said
exhaust blower having a tubular body with a lower end inlet
connected to an upper exhaust port of said smoke collecting hood
and an upper end outlet connected to a lower drawing port of
said exhaust blower, the inner diameter of the tubular body
being greater than those of the lower end inlet and the upper
end outlet.
The cooking equipment may be mounted on a floor.
The smoke collecting hood may include guide plates for
rectifying ascending smoke provided therein.
The tubular body of the air chamber may be cylindrical
or square. The cooking exhaust apparatus may further comprise a
connecting pipe for connecting between the upper exhaust port of
the smoke collecting hood and the lower end inlet of the air
chamber, the upper portion of said connecting pipe protruding in
said air chamber to form an oil sink between the inner wall of
the tubular body and the outer wall of the protruded connecting
pipe.
The upper end of the connecting pipe may be covered by
a fire extinguishing net.
When the above-described cooking exhaust apparatus is
mounted in place of an existing conventional exhaust apparatus,
an exhausting port of the exhaust blower may be connected to an
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existing exhaust pipe provided in a ceiling.
In case of switching on a range of a cooking equipment
mounted on a floor and cooking by using a pan or a gridiron
through a trivet, steam, particles of oil, smoke from grilled
food and so on (hereinafter, generically referred as "smoke")
are generated.
By driving an exhaust blower before cooking, an air
within an air chamber is drawn from a downward drawing port of
the exhaust blower so that the inside of the air chamber is
depressurized and the air may be exhausted to the outdoor
through an exhaust pipe provided in the ceiling.
Since the inner diameter of the tubular body of the
air chamber is greater than those of the lower end inlet and the
upper end outlet of the air chamber, air existing along the
inner wall of the tubular body is led upwards by the air flow
from the lower end inlet to the upper end outlet to depressurize
the portion. Further, the suction of the blower maintains the
depressurised state of the portion along the inner wall of the
tubular body to rise the suction power in the lower end inlet.
By providing guide plates for rectifying ascending
smoke in the smoke collecting hood, the ascending flow of smoke
is promoted. Further, since smoke or flame generated by cooking
comes into contact with the guide plates, the plates absorb heat
from smoke or flame to prohibit heat from accumulating and the
flame will be extinguished. Heat is also absorbed by the fire
extinguishing net when the air flow passes therethrough. As a
result, remaining flame is extinguished and ascending particles
of oil to be scattered will fall into the oil sink formed
between the inner wall of the tubular body and the outer wall of
the protruded connecting pipe. That is, dripping or ascending
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of the oil particles is obstructed.
The cooking exhaust apparatus according to the present
invention can be mounted in each of kitchens of a multistoried
dwelling house in place of an existing conventional exhaust
apparatus by connecting an exhausting port of the exhaust blower
to an existing exhaust pipe provided among the beams.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a side view showing a cooking exhaust
apparatus according to an embodiment of the present invention,
Fig. 2 is a side view showing a cooking exhaust
apparatus according to another embodiment,
Figs. 3 and 4 are a side view and a front view showing
a cooking exhaust apparatus according to still another
embodiment, respectively,
Fig. 5 is a sectional view taken along line A-A in
Fig. 4,
Fig. 6 is a sectional view showing a cooking exhaust
apparatus according to another embodiment,
Figs. 7 and 8 are a perspective view and a exploded
perspective view showing a cooking exhaust apparatus according
to another embodiment, respectively, and
Fig. 9 is a sectional view of the apparatus shown in
Fig. 7.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Preferred embodiments of the present invention will be
hereinafter described in detail with reference to the
accompanying drawings in which the same reference numerals
denote the same or corresponding components.
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In Figs. 1 to 6, a cooking equipment 2 is located on a
floor 1 of a kitchen in a multistoried dwelling house or a
detached house in a state of touching a wall 9. A gas or
electric range 3 is mounted on the upper surface of the cooking
equipment 2, and a smoke collecting hood 4 is arranged just
above the range 3. Provided at the left and right sides of the
hood 4 is a hanging cupboard. Therefore, a vertical cover board
is provided in front of the hood 4 on the same vertical plane
as a front surface of the hanging cupboard.
The smoke collecting hood 4 has a shape of a truncated
pyramid tube and is provided with a plurality of guide plates
for rectifying ascending smoke 7 which are arranged
symmetrically with respect to right and left in a direction of
an upper exhaust port 4' of the hood 4. The central one of the
plates 7 is the highest, and the farther separated to right and
left, the lower the plates 7 are. The plates 7 are made of
stainless steel and have a function of absorbing heat.
As shown in Figs. 1 and 3 to 9, disposed above the
smoke collecting hood 4 is an air chamber 5 having a tubular
body with a lower end inlet 5' and an upper end outlet 5 " . The
lower end inlet 5' is connected and fitted to the upper exhaust
port 4' of the hood 4, while the upper end outlet 5 " is
connected and fitted to a lower drawing port 6' of an exhaust
blower 6. The tubular body of the air chamber 5 may be
cylindrical or square and the inner diameter thereof is greater
than those of the lower end inlet 5' and the upper end outlet
As shown in Fig. 2, the lower drawing port 6' of the
exhaust blower 6 may be connected to the upper end outlet 5 " of
the air chamber 5 through a connecting pipe 10a. A flexible
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pipe or bellows pipe may be used as the connecting pipe 10a. By
using the connecting pipe 10a, the exhaust blower 6 may be
disposed between a slab 11 and a suspended ceiling 12 and be
straightly connected to an exhaust pipe 8 provided in the
ceiling.
A sirocco fan and the like may be used as the exhaust
blower 6. An exhausting port 6 " of the exhaust blower 6 may be
straightly connected to a new or existing exhaust pipe 8
provided in the ceiling (Fig. 2), or connected to the exhaust
pipe 8 with bending by using a bellows pipe 13 (Figs. 1 and 3 to
5). In a kitchen of a detached house, as shown in Fig. 6, the
exhausting port 6 " of the exhaust blower 6 rather opens to a
newly-established ventilation window 14.
As shown in Figs. 7 and 8, the upper exhaust port 4'
of the hood 4 and the lower end outlet 5' of the air chamber 5
may be formed so as to have square shapes, and a cylindrical
connecting pipe 5a may be connected to the lower end outlet 5'
such that the upper portion 5a' of the connecting pipe 5a
protrudes in the tubular body to form an oil sink a having a
doughnut shape between the inner wall of the tubular body and
the outer wall of the protruded upper portion 5a' of the
connecting pipe 5a, as shown in Fig. 9.
The upper end of the protruded upper portion 5a' of
the connecting pipe 5a may be covered by a fire extinguishing
metal net 22 having a dome shape, as shown in Fig. 9.
In the drawings, numeral 15 denotes a motor of the
exhaust blower 6, 16 a sirocco rotating fan, 17 an outer wall,
18 an outer wall opening of the exhaust pipe 8, 19 a cover for
the opening 18, 20 a hanging jig, and 21 a smoke introducing
plate.
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In the cooking exhaust apparatus according to the
present invention, an air chamber is interposed between a smoke
collecting hood just above a cooking equipment and an exhaust
blower, and the inner diameter of a tubular body of the air
chamber is greater than those of a lower end inlet and an upper
end outlet of the air chamber. Therefore, the inside of the air
chamber is depressurized and the suction power can be increased.
Since guide plates for rectifying ascending smoke are
provided within the smoke collecting hood, the ascending flow of
smoke is promoted and smoke generated by cooking is apt to be
collected to the central portion from the lower end of the hood
so that the exhaust of smoke can be well practiced. Further,
the plates absorb heat from smoke or flame to extinguish the
flame.
Ascending particles of oil are caught into an oil sink
to maintain the blower and the exhaust pipe to be clear. A fire
extinguishing net also absorb heat from smoke or flame so that
extinguishment of flame is surely done.
