Liquid heaters and vaporizers – Stand boiler – Fluid fuel burner
Reexamination Certificate
2001-06-05
2002-07-09
Wilson, Gregory A. (Department: 3749)
Liquid heaters and vaporizers
Stand boiler
Fluid fuel burner
C122S015100, C122S019100
Reexamination Certificate
active
06415744
ABSTRACT:
BACKGROUND OF THE DEVICE
1. Field of the Device
The present device relates to a combustion boiler, and relates more particularly to a combustion boiler that can have improved air suction and exhaust functions.
2. Description of the Related Art
As well known, boilers are divided into various kinds in accordance with heat source kinds, installation manners, places to be installed, suction and exhaust manners, feed water methods, structures of a heat exchanger and so on.
FIG. 1
shows an exemplary view of a conventionally used upward combustion boiler with an exhaust fan part. As shown, the conventional upward combustion boiler uses a heating pin
93
a
, wherein air is sucked from the outside, while an exhaust gas is being forcedly exhausted to the outside by virtue of an exhaust fan part
20
.
In operation, if a driving motor
21
of the exhaust fan part
20
operates, an exhaust fan
23
, which is fixed on the rotary shaft of the driving motor
21
is rotated, with a result that the air within a combustion chamber A forcedly flows to an exhaust line
60
. Therefore, the internal pressure of the exhaust line
60
is higher than an atmospheric pressure, whereas a back pressure thereto is applied to the combustion chamber A, a burner
30
, a suction line
13
and a suction inducing member
11
, such that the air from the outside is sucked to the suction inducing member
11
through inlet holes
11
a
and then flows to the combustion chamber A via the suction line
13
and the burner
30
. After that, the air forcedly flows to the exhaust line
60
through the exhaust fan
23
and is finally exhausted to the outside via outlet holes
60
a
of the exhaust line
60
.
Under the above state, when fuel is injected from a fuel supply line
70
via a nozzle
80
a
of a fuel injection part
80
, the fuel injected is mixed with the air in the interior of the burner
30
. Then, the resulting mixed gas is emitted to the combustion chamber A via flame holes of the burner
30
.
At this time, if an igniter (which is not shown in the drawing) operates, the mixed gas emitted through the flame holes of the burner
30
is ignited.
On the other hand, when heating water in a heating line is forcedly circulated by means of a circulating pump
100
, the heating water at a low temperature flows from the lower portion of a heater (which is not shown in the drawing) to a heat exchanger
93
through a water inlet tube
91
and is then returned to the lower portion of the heater through a water outlet tube
92
. As a consequence, the heating water at the low temperature in the heat exchanger
93
with the heating pin
93
a
is heated to a high temperature by the combustion gas at a high temperature in the combustion chamber A, and the heating water at the low temperature from the water inlet tube
91
flows in the interior of the heat exchanger
93
and heated to a high temperature. Then, the heated water is returned to the lower portion of the heater through the water outlet tube
92
.
FIG. 2
shows another exemplary view of a conventionally used upward combustion boiler with an exhaust fan part. As shown, the conventional upward combustion boiler uses a combustion gas inducing tube
45
, wherein air in the room is sucked, while an exhaust gas is being forcedly exhausted to the outside by virtue of the exhaust fan part
20
.
In operation, if the driving motor
21
of the exhaust fan part
20
operates, the exhaust fan
23
, which is fixed on the rotary shaft of the driving motor
21
is rotated, with a result that the air within an exhaust chamber
50
forcedly flows to the exhaust line
60
(See
FIG. 3
) through an exhaust hole
20
a
of the exhaust fan part
20
. Therefore, the internal pressure of the exhaust line
60
is higher than an atmospheric pressure, whereas a back pressure thereto is applied to the exhaust chamber
50
, the combustion gas inducing tube
45
, a combustion chamber
48
, a suction chamber
14
and a suction line
13
, such that the air in the room is sucked to the opening of the suction line
13
and then flows to the suction chamber
14
via the suction line
13
. After that, the part of the air induced to the suction chamber
14
directly flows to the combustion chamber
48
through the hole of the suction chamber
14
and the other flows to the interior of the burner
30
through a Venturi tube
31
and then to the combustion chamber
48
through the flame holes of the burner
30
. Thereafter, the air flown to the combustion chamber
48
is delivered to the exhaust chamber
50
through the combustion gas inducing tube
45
and then forcedly flows to the exhaust line
60
through the exhaust fan
23
rotating, thereby being finally exhausted to the outside.
Under the above state, when fuel is injected from the fuel supply line
70
via the nozzle
80
a
of the fuel injection part
80
to a Venturi tube
31
of the burner
30
, the fuel injected is mixed with the air in the interior of the suction chamber
14
. Then, the resulting mixed gas is emitted to the combustion chamber
48
via the flame holes of the burner
30
.
At this time, if an igniter (which is not shown in the drawing) operates, the mixed gas emitted through the flame holes of the burner
30
is ignited.
On the other hand, when heating water in a heating line is forcedly circulated by the circulating pump
100
(See FIG.
1
), the heating water at a low temperature flows from the lower portion of a heater (which is not shown in the drawing) to a water chamber
46
of a heat exchanger
40
through the water inlet tube
91
(See
FIG. 1
) and is then returned to the lower portion of the heater through the water outlet tube
92
(See FIG.
1
). As a consequence, the heating water at the low temperature in the water chamber
46
of the heat exchanger
40
is heated to a high temperature by the combustion gas being at a high temperature that flows in the combustion chamber
48
and the combustion gas inducing tube
45
and then returned to the lower portion of the heater through the water outlet tube
92
.
FIG. 3
shows still another exemplary view of a conventionally used upward combustion boiler with an exhaust fan part. As shown, the conventional upward combustion boiler uses a combustion gas inducing tube
45
, wherein air is sucked from the outside, while an exhaust gas is being forcedly exhausted to the outside by virtue of the exhaust fan part
20
.
In this case, a suction inducing member
11
is disposed on the free end portion of the exhaust line
60
, outlet holes
60
a
and inlet holes
11
a
are respectively provided on the free end of the exhaust line
60
and on the front end of the outside of the suction inducing member
11
, and the suction line
13
communicates with the suction inducing member
11
, such that the exhaust gas is exhausted to the outside, while the air in the outside is being sucked.
FIG. 4
shows an exemplary view of a conventionally used downward combustion boiler with an exhaust fan part. As shown, the conventional upward combustion boiler uses a combustion gas inducing tube
45
, wherein air in the room is sucked, while an exhaust gas is being forcedly exhausted to the outside by virtue of the exhaust fan part
20
.
In operation, if the driving motor
21
of the exhaust fan part
20
operates, the exhaust fan
23
, which is fixed on the rotary shaft of the driving motor
21
is rotated, with a result that the air within an exhaust chamber
50
forcedly flows to the exhaust line
60
(See
FIG. 3
) through an exhaust hole
20
a
of the exhaust fan part
20
. Therefore, the internal pressure of the exhaust line
60
is higher than an atmospheric pressure, whereas a back pressure thereto is applied to the exhaust chamber
50
, the combustion gas inducing tube
45
, an inversion inducing chamber
47
, a combustion tube
44
and a suction line
13
, such that the air in the room is sucked to the opening of the suction line
13
. After that, the part of the air from the suction line
13
directly flows to the combustion tube
44
and the other flows to the interior of the burner
30
thro
Kiturami Gas Boiler Co., Ltd.
Wilson Gregory A.
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