AN OVEN WITHOUT DUST RISE

POELE EMPECHANT LES CENDRES DE S'ENVOLER

English Abstract

An ash-can-not-fly stove using biomass particle fuel comprises a body (1) having a combustion box (10) and an auxiliary equipment box (20), the body (1) is fixable on the ground. An opening (131) is set on the top surface of the body (1). A burner (30) having a fuel shelf (31) is within the combustion box (10). A blast zone (33) is formed below the fuel shelf (31) and a flame zone (34) is formed above the fuel shelf (31). Several vent pores (311) are set on the fuel shelf (31). A fuel transport mechanism (50) and an electrical apparatus (60) are within the auxiliary equipment box (20). The electrical apparatus (60) comprises an exhaust blower (61). An ash-removal device (40) is between the burner (30) and the opening (131). The ash-removal device (40) comprises a cylindrical inner wall (41) and a cylindrical outer wall (42). Ventilated space (43) is formed between the cylindrical inner wall (41) and the cylindrical outer wall (42). A ring-shaped slit (44) is formed between the cylindrical inner wall (41) and the cylindrical outer wall (42), the ring-shaped slit is near the opening (131). The ventilated space (43) is connected to the exhaust blower (61) via an air duct (45). The present invention could reduce the pollution to the environment and the food.

French Abstract

L'invention concerne un poêle empêchant les cendres de s'envoler utilisant un combustible à particules de la biomasse comprenant un corps (1) présentant une boîte de combustion (10) et une boîte d'équipement auxiliaire (20), le corps (1) pouvant être fixé sur le sol. Une ouverture (131) est définie sur la surface supérieure du corps (1). Un brûleur (30) comprenant un élément de stockage de combustible (31) se situe à l'intérieur de la boîte de combustion (10). Une zone d'explosion (33) est formée sous l'élément de stockage de combustible (31) et une zone de flamme (34) est formée au-dessus de l'élément de stockage de combustible (31). Plusieurs pores de ventilation (311) sont définis sur l'élément de stockage de combustible (31). Un mécanisme de transport de combustible (50) et un appareil électrique (60) sont situés à l'intérieur de la boîte d'équipement auxiliaire (20). L'appareil électrique (60) comprend un ventilateur d'aspiration (61). Un dispositif de retrait de cendres (40) est situé entre le brûleur (30) et l'ouverture (131). Le dispositif de retrait de cendres (40) comprend une paroi interne cylindrique (41) et une paroi externe cylindrique (42). Un espace ventilé (43) est formé entre la paroi interne cylindrique (41) et la paroi externe cylindrique (42). Une fente annulaire (44) est formée entre la paroi interne cylindrique (41) et la paroi externe cylindrique (42), la fente annulaire étant proche de l'ouverture (131). L'espace ventilé (43) est raccordé au ventilateur d'aspiration (61) par le biais d'une conduite d'air (45). La présente invention permet de réduire la pollution de l'environnement et des aliments.

Claims

CLAIMS
1. An oven without dust rise using biomass fuel comprising:
a body which is able to be placed on the ground, said body having a combustion
cabinet and an auxiliary equipment cabinet, said combustion cabinet having a
bottom
which is able to be levelly placed on the ground, a side extending upward from
a
peripheral of said bottom, and a top in connection with an upper peripheral of
said side
and opposite to said bottom, an oven-top being defined in said top, said
combustion
cabinet having a burner received therein, said burner having a fire grate, an
air supply
zone being defined beneath said fire grate and burning zone being defined
above said fire
grate, a plurality of vent-holes being defined in said fire grate, said
auxiliary equipment
cabinet having a fuel supply mechanism and an electrical equipment received
therein,
said fuel supply mechanism having a hopper, a fuel tube having one end in
communication with said hopper and a free end extending into said burning
zone, and a
rotary vane feeder rotatably received in said fuel tube, said electrical
equipment having a
suction fan, a feeding motor for driving said rotary vane feeder, an air
blower for
supplying air to said air supply zone, a power supply, a switch, and a power
light, a dust
removing device between said burner and said oven-top, said dust removing
device
having a cylindrical inner wall and a cylindrical outer wall between which an
ventilation
zone is defined, a circular slit being defined between said cylindrical inner
wall and said
cylindrical outer wall near said oven-top, a ventilating duct connecting said
ventilation
zone with a suction fan.

2. The oven without dust rise as claimed in claim 1, wherein a dust removing
tank is
provided in said combustion cabinet beside said burner, said dust removing
tank being in
communication with said ventilating duct and having filter water therein, a
middle wall
sticking out water level, a first side wall under said water level on one side
of said middle
wall, and a second side wall under said water level on the other side of said
middle wall,
a side of said dust removing tank of said first wall side being in
communication with said
ventilating duct of said oven-top side, and the other side of said dust
removing tank of
said second wall side being in communication with said ventilating duct of
said suction
fan side.

Description

CA 02865955 2014-08-27
AN OVEN WITHOUT DUST RISE
CROSS-REFERENCE TO RELATED APPLICATIONS
Not Applicable
STATEMENT REGARDING FEDERALLY SPONSORED
RESEARCH OR DEVELOPMENT
Not Applicable
INCORPORATION-BY-REFERENCE OF MATERIAL SUBMITTED ON A
COMPACT DISC
Not Applicable
BACKGROUND OF THE INVENTION
1. Field of the Invention
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CA 02865955 2014-08-27
The invention relates to an oven for use with biomass fuel, and more
particularly, to an
oven using granule made by smashed and then briquetted straw, bits of wood, or
crop
stalks and having no rise of dust from an oven-top thereof.
2. Description of Related Art
Biomass fuel is granule made by smashed and then briquetted straw, bits of
wood, or
crop stalks. As a new energy solution, biomass fuel has wider and wider been
used
because it is hygienic, environmental, high efficient, and economic.
A conventional biomass oven is disclosed in a PCT application
PCT/CN2011/080668
"An Oven Having Enclosed Heat Exchange Zone". As shown in Fig. 4, the oven has
a
body 9 which is able to be placed on the ground. The body 9 has a combustion
cabinet 91
and an auxiliary equipment cabinet 92. The combustion cabinet 91 has a burner
93
received therein. An air supply zone 94 is defined below the burner 93 and a
burning
zone 95 is defined above the burner 93. A heating zone 96 is beyond the burner
93. Heat
exchanges mainly in the heating zone 96. An oven-top 97 is defined in a top of
the
combustion cabinet 97. A pot (not shown) may be placed on the oven-top 97.
The main drawback of this traditional oven is dust rise. When a user takes the
pot off the
oven-top 97, ash in the burning and the heating zones 95, 96 will fly out from
the oven-
top 97, which may pollute surrounding ambient and food being heated.
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BRIEF SUMMARY OF THE INVENTION
The main object of the invention is to provide an oven without dust rise. It
is not easy for
ash in a burning and a heating zones of the oven to fly out when a pot on an
oven-top is
taken off.
In order to accomplish the above objects, the present invention provides an
oven without
dust rise. The oven uses biomass fuel and has a body which is able to be
placed on the
ground. The body has a combustion cabinet and an auxiliary equipment cabinet.
The
combustion cabinet has a bottom which is able to be levelly placed on the
ground, a side
extending upward from a peripheral of the bottom, and a top in connection with
an upper
peripheral of the side and opposite to the bottom. An oven-top is defined in
the top. The
combustion cabinet has a burner received therein. The burner has a fire grate,
an air
supply zone being defined beneath the fire grate and burning zone being
defined above
the fire grate. A plurality of vent-holes is defined in the fire grate. The
auxiliary
equipment cabinet has a fuel supply mechanism and an electrical equipment
received
therein. The fuel supply mechanism has a hopper, a fuel tube having one end in
,
communication with said hopper and a free end extending into said burning
zone, and a
rotary vane feeder rotatably received in said fuel tube. The electrical
equipment has a
suction fan, a feeding motor for driving said rotary vane feeder, an air
blower for
supplying air to said air supply zone, a power supply, a switch, and a power
light. A dust
removing device is between the burner and the oven-top. The dust removing
device has a
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CA 02865955 2014-08-27
cylindrical inner wall and a cylindrical outer wall between which an
ventilation zone is
defined. A circular slit is defined between the cylindrical inner wall and the
cylindrical
outer wall near the oven-top. A ventilating duct connects the ventilation zone
with a
suction fan.
The oven without dust rise of the invention has following beneficial effect.
When the user
takes a pot off a burning oven, gas going out from the burning zone goes into
the
ventilation zone through the circular slit under pressure from the suction fan
and exhausts
via the ventilating duct. Dust contained in the gas flows slower and may drop
into a dust
collect zone. The dust will no longer fly out of an oven-top driven by an air
blower.
Pollution to surrounding ambient and food being heated is able to be reduced.
These and other objectives, features, and advantages of the present invention
will become
apparent from the following detailed description, the accompanying drawings,
and the
appended claims.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
Fig. 1 is a schematic perspective view of the preferred embodiment of the oven
of the
invention.
Fig. 2 is a cross-sectional schematic view of the oven shown in Fig. 1.
Fig. 3 is a circuit diagram of an electrical equipment of the oven shown in
Fig. 1.
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Fig. 4 is a cross-sectional view of a conventional biomass fuel oven. And,
Fig. 5 is an exploded perspective view of another embodiment of the oven of
the
invention.
DETAILED DESCRIPTION OF THE INVENTION
Shown in Fig. 1 is the preferred embodiment of the invention, an oven without
dust rise.
The oven has a body 1 which is able to be placed on the ground. The body 1 has
a
combustion cabinet 10 and an auxiliary equipment cabinet 20.
With reference to Figs. 2 and 3, the combustion cabinet 10 has a bottom 11
which is able
to be levelly placed on the ground, a side 12 extending upward from a
peripheral of the
bottom 11, and a top 13 in connection with an upper peripheral of the side 12
and
opposite to the bottom 11. An oven-top 131 is defined in the top 13. A door
121 is
provided in the side 12.
The combustion cabinet 10 has a burner 30 received therein. The burner 30 has
a fire
grate 31. An air supply zone 33 is defined beneath the fire grate 31 and
burning zone 34
is defined above the fire grate 31. A plurality of vent-holes 311 are defined
in the fire
grate 31.
A dust removing device 40 is provided between the burner 30 and the oven-top
131. The
dust removing device 40 has a cylindrical inner wall 41 and a cylindrical
outer wall 42

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between which an ventilation zone 43 is defined. A circular slit 44 is defined
between the
cylindrical inner wall 41 and the cylindrical outer wall 42 near the oven-top
131. The
ventilation zone 43 is in communication with a suction fan 61 via a
ventilating duct 45. A
pot (not shown) is able to be placed on the oven-top 131.
The auxiliary equipment cabinet 20 has a fuel supply mechanism 50 and an
electrical
equipment 60 received therein. The fuel supply mechanism 50 has a hopper 51, a
fuel
tube 52 having one end in communication with a bottom outlet of the hopper 51
and a
free end extending into the burning zone 34, and a rotary vane feeder 53
rotatably
received in the fuel tube 52. The electrical equipment 60, as shown in Fig. 3,
has the
suction fan 61, a feeding motor 62 for driving the rotary vane feeder 53, an
air blower 63
for supplying air to the air supply zone 33, a power supply 64, a switch 65
and a power
light 66. The power supply 64 may be an independent alternating current/direct
current
power supply 641, having or having not a storage battery 642 in parallel as
auxiliary.
Either the alternating current/direct current power supply 641 or the storage
battery 642 is
able to supply power independently. The switch 65 is installed on the
auxiliary equipment
cabinet 20 and able to control the power supply of whole circuit. The power
light 66 is
also installed on the auxiliary equipment cabinet 20 near the switch 65 and
used to indict
status of power supply.
Fuel 70 is biomass fuel granule made by smashed and then briquetted straw,
bits of wood,
or crop stalks.
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In use, a user is able to first stably place the body 1 of the oven on the
ground where there
is desirable and then load fuel 70 into the hopper 51. The user is able to put
either water
or food into the pot and then place the pot on the oven-top 131 of the top 13.
The user is
able to load some fuel in the burner 30 in advance and ignite the fuel with a
litten alcohol
cotton ball. When the user turns on the switch 65, the power light 66 turns
up, indicating
that the electrical circuit is closed and the oven starts to work. The feeding
motor 62
starts to rotate, driving the rotary vane feeder 53 to send the fuel 70 into
the burner 30.
Biomass fuel granule falls onto the fire grate 31 under the gravity and starts
to burn
continuously. At this time, the air blower 63 starts to supply air to the air
supply zone 33.
Air enters the burning zone 34 through the vent-holes 311 in the fire grate 31
and
provides oxygen for combustion of the fuel 70. Methane gas is generated in a
process of
burning of the fuel 70. With air flow produced by the air blower 63, the
methane gas
burns into flames. Also at the same time, the suction fan 61 starts to work.
Gas in the
burning zone 34 enters the ventilation zone 43 through the circular slit 44
under a suction
of the suction fan 61, and exhausts through the ventilating duct 45
thereafter. The arrows
in the circular slit 44, ventilation zone 43 and the ventilating duct 45 in
Fig. 2 show a
flowing direction of the gas.
Shown in Fig. 5 is an exploded perspective view of another embodiment of the
invention.
This embodiment is basically the same as the above preferred embodiment,
except that a
dust removing tank 46 is provided in the combustion cabinet 10 beside the
burner 30. The
dust removing tank 46 is in communication with the ventilating duct 45 and has
filter
water 47 therein, a middle wall 461 sticking out water level, a first side
wall 462 under
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the water level on one side of the middle wall 461, and a second side wall 463
under the
water level on the other side of the middle wall 461. A side of the dust
removing tank 46
of the first wall 462 side is in communication with the ventilating duct 45 of
the oven-top
131 side, and the other side of the dust removing tank 46 of the second wall
463 side is in
communication with the ventilating duct 45 of the suction fan 61 side. The
arrows in the
dust removing tank 46 shown in Fig. 5 show a flowing direction of gas. In use,
gas goes
through the circular slit 44 and the ventilating duct 45 to the side of the
dust removing
tank 46 of the firs wall 462 side and enters into the filter water 47 here.
The gas goes out
of the filter water 46 between the first side wall 462 and the middle wall
461. The gas
will re-enters the filter water 47 between the middle wall 461 and the second
side wall
463 under a negative pressure produced by the suction fan 61. The gas goes out
of the
filter water again at the side of the dust removing tank 46 of the second wall
463 side and
finally enters the ventilating duct 45 of the suction fan 61 side. After
passing through the
filter water 47 in the dust removing tank 46, dust in the gas is left in the
water and dust
rise will be able to be further reduced.
From above description, it is seen that the objects of the present invention
have been fully
and effectively accomplished. Embodiment of the invention has been shown and
described for the purposes of illustrating the functional and structural
principles of the
present invention and is subject to change without departure from the
invention's
principles. Therefore, this invention includes all modifications encompassed
within the
spirit and scope of the following claims.
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Representative Drawing