U.S. patent application number 14/373383 was filed with the patent office on 2014-12-25 for hot water storage tank-type condensing boiler having multi-stage structure.
The applicant listed for this patent is Sung-Hwan Choi. Invention is credited to Sung-Hwan Choi.
Application Number | 20140373794 14/373383 |
Document ID | / |
Family ID | 48799378 |
Filed Date | 2014-12-25 |
United States Patent
Application |
20140373794 |
Kind Code |
A1 |
Choi; Sung-Hwan |
December 25, 2014 |
HOT WATER STORAGE TANK-TYPE CONDENSING BOILER HAVING MULTI-STAGE
STRUCTURE
Abstract
A hot water storage tank-type condensing boiler having a
multi-stage structure is provided where the upper end plate of a
water tank exposed to a firebox is formed to have a multi-stage
structure so that the distances at which each portion of the upper
end plate is exposed to a flame are the same to uniformly heat
water filled within the water tank at each of the portions. In
addition, like the upper end plate, the lower end plate may be
formed to have a multi-stage structure so that the distances
between each of the stages of the upper end plates and each of the
stages of the lower end plate are the same. Thus, furnace tubes
passing through the upper and lower end plates may have the same
length to improve productivity and provide the same combustion
load.
Inventors: |
Choi; Sung-Hwan; (Seoul,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Choi; Sung-Hwan |
Seoul |
|
KR |
|
|
Family ID: |
48799378 |
Appl. No.: |
14/373383 |
Filed: |
September 17, 2012 |
PCT Filed: |
September 17, 2012 |
PCT NO: |
PCT/KR2012/007404 |
371 Date: |
July 21, 2014 |
Current U.S.
Class: |
122/18.1 |
Current CPC
Class: |
Y02B 30/00 20130101;
Y02B 30/102 20130101; F24H 1/18 20130101; F28F 1/40 20130101; Y02E
60/142 20130101; F24H 8/00 20130101; F28D 20/0034 20130101; F24H
9/0031 20130101; F24H 9/0005 20130101; F24H 1/186 20130101; Y02E
60/14 20130101; F28D 7/1676 20130101; F24H 1/287 20130101 |
Class at
Publication: |
122/18.1 |
International
Class: |
F24H 1/18 20060101
F24H001/18; F24H 9/00 20060101 F24H009/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 19, 2012 |
KR |
10-2012-0005977 |
Claims
1. A hot water storage tank-type condensing boiler having a
multi-stage structure, comprising: a boiler casing (110) having a
firebox (111) disposed in the boiler casing (110); a burner (151)
that is installed on an upper portion of the boiler casing (110)
and that emits a flame toward the firebox (111); an upper end plate
(121) that constitutes an upper plate of a water tank (120)
installed to be exposed to the firebox (111) and has a multi-stage
structure including multi-stage portions (121a, 121b, and 121c) so
that heights of the stages (121a, 121b, and 121c) are increased
from a center of the upper end plate (121) where distances from the
flame that is emitted toward the firebox (111) are closest, to ends
of the upper end plate (121) where the distances from the burner
(151) to the flame are farthest; a lower end plate (122) that
constitutes a lower plate of the water tank (120), has the same
pattern as that of the upper end plate (121) and has a multi-stage
structure including multi-stage portions (122a, 122b, and 122c) so
that heights of the stages (122a, 122b, and 122c) are increased
from a center to ends of the lower end plate (122); and a plurality
of furnace tubes (130) which are installed to pass through the
upper end plate (121) and the lower end plate (122), of which open
top ends are connected to the firebox (111) and of which open
bottom ends are connected to a combustion gas discharge portion
(140).
2. The hot water storage tank-type condensing boiler of claim 1,
wherein distances between each of the stages (121a, 121b, and 121c)
of the upper end plate (121) and each of the stages (122a, 122b,
and 122c) of the lower end plate (122) that are disposed directly
under each of the stages (121a, 121b, and 121c) of the upper end
plate (121) are the same, respectively.
3. The hot water storage tank-type condensing boiler of claim 2,
wherein the plurality of furnace tubes (130) have the same length
and are respectively installed at each of the stages (121a, 121b,
and 121c) of the upper end plate (121) and at each of the stages
(122a, 122b, and 122c) of the lower end plate (122) that have the
same distances between each of the stages (121a, 121b, and 121c) of
the upper end plate (121) and each of the stages (122a, 122b, and
122c) of the lower end plate (122).
4. The hot water storage tank-type condensing boiler of claim 1,
wherein wrinkled extrusion pins (130a) are inserted into the
furnace tubes (130).
5. The hot water storage tank-type condensing boiler of claim 2,
wherein wrinkled extrusion pins (130a) are inserted into the
furnace tubes (130).
6. The hot water storage tank-type condensing boiler of claim 3,
wherein wrinkled extrusion pins (130a) are inserted into the
furnace tubes (130).
Description
BACKGROUND
[0001] The present invention relates to a hot water storage
tank-type condensing boiler having a multi-stage structure, and
more particularly, to a hot water storage tank-type condensing
boiler having a multi-stage structure in which an upper end plate
of a water tank exposed to a firebox is formed to have a
multi-stage structure so that distances at which each portion of
the upper end plate is exposed to a flame are the same to uniformly
heat water filled within a water tank at each of the portions.
[0002] In addition, the present invention relates to a hot water
storage tank-type condensing boiler in which, like the upper end
plate, the lower end plate may be formed to have a multi-stage
structure so that distances between each of the stages of the upper
end plate and each of the stages of the lower end plate are the
same so that furnace tubes passing through the upper and lower end
plates may have the same length to improve productivity and provide
the same combustion load.
[0003] In general, boilers that are used at home, in an office, a
factory, and various public buildings are classified into hot
storage water tank-type heaters and instantaneous (also called
"tankless") boilers according to a method of heating water
[0004] In an instantaneous boiler, direct water supplied via a
direct water pipe is supplied to a heat exchanger, is
instantaneously heated by a burner and then is supplied to a user.
The instantaneous boiler has a fast heating speed, but the amount
of the direct water that may be heated at one time, is small such
that the instantaneous boiler cannot supply a sufficient amount of
hot water or heated water.
[0005] On the other hand, in the hot water storage tank-type
boiler, since the direct water that flows into the direct water
pipe is always heated by heat-exchanging coils installed within a
hot water tank at an appropriate high temperature, the user can use
hot water or heated water immediately, and the amount of supply of
hot water or heated water is larger than that of the instantaneous
boiler.
[0006] Some documents including Korean Patent Publication No.
2011-0135438 disclose a hot water storage tank-type condensing
boiler, in which an end plate in a firebox into which a flame
generated in a burner is emitted, which is formed to have a
multi-stage structure in which heights of portions of the end plate
are different, so as to prevent boiling noise from occurring due to
an air layer that remains in the firebox and inner sides of furnace
tubes when combustion heat is concentrated.
[0007] However, in the above-described related art, boiling noise
can be prevented, but distances between each of the portions of a
water tank exposed to the firebox and the flame are not the same
such that a water cutoff phenomenon cannot be prevented from
occurring.
[0008] That is, the water cutoff phenomenon occurs, for example,
when an amount of heated water or hot water is insufficient. The
water tank is locally overheated by the flame generated in the
burner, and water is changed into water vapor of 100.degree. C. or
higher so that water flow causes a part of water in the water tank
to shake or shudder. If the water cutoff phenomenon cannot be
prevented, the supply of heated water or hot water is not
efficiently performed, and noise occurs due to water shock.
[0009] In addition, in the related art, when the end plate in the
firebox is formed to have a multi-stage structure so as to prevent
boiling noise, lengths of furnace tubes passing through each of the
stages need to be different. Thus, furnace tubes having various
lengths need to be individually manufactured, and when assembling
of the furnace tubes is performed, a furnace tube having a length
suitable for each stage needs to be found. Thus, productivity is
greatly lowered.
SUMMARY OF THE INVENTION
[0010] The present invention is directed to providing a hot water
storage tank-type condensing boiler having a multi-stage structure
in which an upper end plate of a water tank exposed to a firebox is
formed to have a multi-stage structure so that distances at which
each portion of the upper end plate is exposed to a flame are the
same to uniformly heat water filled within a water tank at each of
the portions.
[0011] The present invention is also directed to providing a hot
water storage tank-type condensing boiler in which, like the upper
end plate, the lower end plate may be formed to have a multi-stage
structure so that distances between each of the stages of the upper
end plate and each of the stages of the lower end plate are the
same so that furnace tubes passing through the upper and lower end
plates may have the same length to improve productivity and provide
the same combustion load.
[0012] One aspect of the present invention provides a hot water
storage tank-type condensing boiler having a multi-stage structure,
including: a boiler casing having a firebox disposed in the boiler
casing; a burner that is installed on an upper portion of the
boiler casing and that emits a flame toward the firebox; an upper
end plate that constitutes an upper plate of a water tank installed
to be exposed to the firebox and has a multi-stage structure
including multi-stage portions so that heights of the stages are
increased from a center of the upper end plate where distances from
the flame that is emitted toward the firebox are closest, to ends
of the upper end plate where the distances from the burner to the
flame are farthest; a lower end plate that constitutes a lower
plate of the water tank, has the same pattern as that of the upper
end plate and has a multi-stage structure including multi-stage
portions so that heights of the stages are increased from a center
to ends of the lower end plate; and a plurality of furnace tubes
which are installed to pass through the upper end plate and the
lower end plate, of which open top ends are connected to the
firebox and of which open bottom ends are connected to a combustion
gas discharge portion.
[0013] Distances between each of the stages of the upper end plate
and each of the stages of the lower end plate that are disposed
directly under each of the stages of the upper end plate may be the
same, respectively.
[0014] The plurality of furnace tubes may have the same length and
may be respectively installed at each of the stages of the upper
end plate and at each of the stages of the lower end plate that
have the same distances between each of the stages of the upper end
plate and each of the stages of the lower end plate.
[0015] Wrinkled extrusion pins may be inserted into the furnace
tubes.
[0016] As described above, in a hot water storage tank-type
condensing boiler having a multi-stage structure according to the
present invention, an upper end plate of a water tank exposed to a
firebox is formed to have a multi-stage structure so that distances
at which each portion of the upper end plate is exposed to a flame
are the same. Thus, water filled in the water tank is uniformly
heated at each of the portions so as to prevent a water cutoff
phenomenon from occurring due to part of the water tank that is
locally overheated.
[0017] In addition, according to the present invention, like the
upper end plate, the lower end plate is formed to have a
multi-stage structure so that distances between each of stages of
the upper end plate and each of stages of the lower end plate are
the same so that furnace tubes passing through the upper and lower
end plates may have the same length. Thus, the furnace tubes are
manufactured to have the same length and thus can be assembled
without having to provide different lengths so that productivity
can be improved and the same combustion load can be provided
through each of the furnace tubes.
BRIEF DESCRIPTION OF DRAWINGS
[0018] FIG. 1 is a front cross-sectional view of a hot water
storage tank-type condensing boiler having a multi-stage structure
according to an embodiment of the present invention.
[0019] FIG. 2 is an upper side view of the hot water storage
tank-type condensing boiler having the multi-stage structure
illustrated in FIG. 1.
[0020] FIG. 3 is a lower side view of the hot water storage
tank-type condensing boiler having the multi-stage structure of
FIG. 1.
[0021] FIG. 4 is a plan view of the hot water storage tank-type
condensing boiler having the multi-stage structure of FIG. 1.
DETAILED DESCRIPTION OF THE INVENTION
[0022] Hereinafter, a hot water storage tank-type condensing boiler
having a multi-stage structure according to an exemplary embodiment
of the present invention will be described with reference to the
accompanying drawings.
[0023] First, as illustrated in FIG. 1, a hot water storage
tank-type condensing boiler having the multi-stage structure
according to the current embodiment of the present invention
includes a boiler casing 110 having a firebox 111 disposed in the
boiler casing 110, a supply pipe 112a that supplies direct water, a
discharge pipe 112b that discharges hot water or heated water, and
a combustion unit 150 having a burner 151 that emits a flame toward
the firebox 111.
[0024] In addition, the hot water storage tank-type condensing
boiler having the multi-stage structure according to the current
embodiment of the present invention further includes an upper end
plate 121 that constitutes an upper plate of a water tank 120
installed to be exposed to the firebox 111, a lower end plate 122
that constitutes a lower plate of the water tank 120, furnace tubes
130 that performs a heat-exchanging process between a
high-temperature combustion gas and water, and a combustion gas
discharge portion 140 that discharges a low-temperature combustion
gas passing through the furnace tubes 130 to the outside.
[0025] In this case, the boiler casing 110 constitutes a body of
the boiler. The combustion unit 150 including the burner 151 is
installed on a top end of the boiler casing 110, and the firebox
111 in which the flame generated in the burner 151 is emitted, is
disposed at an upper portion of inner sides of the boiler casing
110 in which burner ports of the burner 151 are disposed, and the
water tank 120 surrounded by the end plates is installed in the
boiler casing 110 to be exposed to the firebox 111.
[0026] In addition, for example, the supply pipe 112a is connected
to a lower portion of the boiler casing 110, and the discharge pipe
112b is connected to an upper portion of the boiler casing 110. The
supply pipe 112a is connected to the water tank 120 via the boiler
casing 110 and supplies direct water or preheated water, and the
discharge pipe 112b discharges heated hot water or heated water to
a load side of the boiler by passing through the water tank
120.
[0027] The combustion unit 150 includes the burner 151, a blower
fan 152, and a fuel suction port 153, as well known to one of
ordinary skill in the art. In particular, the burner 151 pre-mixes
supplied fuel and air at an appropriate ratio to improve combustion
characteristics. Thus, the burner 151 may be a low nitrogen oxide
generation burner 151 that reduces generation of a nitrogen oxide
(NOx). The burner 151 emits the flame and a high-temperature
combustion gas generated during combustion toward the firebox
111.
[0028] The upper end plate 121 constitutes the upper plate of the
water tank 120 installed to be exposed to the firebox 111. The
upper end plate 121 has a multi-stage structure in which heights of
portions 121a, 121b, and 121c are different from each other
compared to a bottom surface of the boiler casing 110. In
particular, in the present invention, the heights of the portions
121a, 121b, and 121c are increased from a center of the upper end
plate 121 where distances from the burner 151 to the flame that is
emitted toward the firebox 111 are closest, to ends of the upper
end plate 121 where the distances from the burner 151 to the flame
are farthest.
[0029] For example, as illustrated in FIGS. 1 and 2, the upper end
plate 121 has a three-stage structure including a first stage 121a,
a second stage 121b, and a third stage 121c. The height of the
first stage 121a that is the outermost portion of the upper end
plate 121 is the largest, and the height of the third stage 121c
that is the center of the upper end plate 121 is the smallest, and
the second stage 121b between the first stage 121a and the third
stage 121c has an intermediate height. Also, the heights of the
stages 121a, 121b, and 121c are adjusted so that amounts of heat
transferred from the flame are the same.
[0030] Since heat caused by the flame that is emitted from the
burner 151 is transferred in a radial direction, distances between
the center of the boiler and the upper end plate 121 are closest
and become farther, closer to the outer sides of the boiler. Thus,
the height of the upper end plate 121 is increased from the center
to its ends so that distances at which each of the stages 121a,
121b, and 121c of the upper end plate 121 is exposed to the flame,
are the same.
[0031] Thus, by forming the upper end plate 121 to have a
multi-stage structure, amounts of heat transferred to the stages
121a, 121b, and 121c of the upper end plate 121 by the flame
generated in the burner 151 are the same. Thus, water filled in the
water tank 120 is uniformly heated at each of the portions, and a
water cutoff phenomenon can be prevented from occurring due to part
of the water tank 120 that is locally overheated.
[0032] The water cutoff phenomenon is a phenomenon in which part of
the water tank 120 is locally overheated by the flame generated in
the burner 151 compared to other parts and water is changed into
water vapor of 100.degree. C. or higher so that water flow causes a
part of water in the water tank to shake or shudder. As with the
present invention, if the water tank 120 is uniformly heated, local
overheating is prevented, and circulation caused by convection of
water is well performed so that heated water or hot water can be
smoothly supplied without cutoff. Also, since water is continuously
convected, noise caused by water shock is also removed.
[0033] In addition, according to the present invention, the lower
end plate 122 that is adjacently installed at a lower side of the
upper end plate 121 also has a multi-stage structure. In this case,
the lower end plate 122 has the same pattern as that of the upper
end plate 121. That is, as illustrated in FIGS. 1 and 3, the lower
end plate 122 also has a three-stage structure including a first
stage 122a, a second stage 122b, and a third stage 122c. Heights
are further decreased from the first stage 122a that is the
outermost portion of the lower end plate 122 to the third stage
122c that is the center of the lower end plate 122 so that
distances from the burner 151 to the stages of the lower end plates
122 become farther.
[0034] In particular, positions of the stages 121a, 121b, and 121c
of the upper end plate 121 and positions of the stages 122a, 122b,
and 122c of the lower end plate 122 corresponding to the upper end
plate 121 are the same in a vertical direction. Simultaneously,
height differences between the stages 121a, 121b, 121c and the
stages 122a, 122b, and 122c, for example, a height difference
between the stages 121a and 121b and a height difference between
the stage 122a and the stage 122b, are the same so that distances
between each of the stages 121a, 121b, and 121c of the upper end
plate 121 and each of the stages 122a, 122b, and 122c of the lower
end plate 122 that are disposed directly under each of the stages
121a, 121b, and 121c of the upper end plate 121 are the same.
[0035] Thus, lengths of a plurality of furnace tubes 130 passing
through the upper end plate 121 and the lower end plate 122 are
also the same. Thus, a plurality of furnace tubes 130 having the
same length are manufactured using the same process, and when the
plurality of furnace tubes 130 are assembled, any furnace tube 130
having a length suitable for each of the stages 121a, 121b, and
121c or 122a, 122b, and 122c may be used without having to provide
different lengths. Thus, productivity is remarkably improved
compared to the related art.
[0036] In addition, temperatures of combustion gases discharged
through the furnace tubes 130 are the same, and simultaneously,
lengths of the furnace tubes 130 are the same to provide the same
combustion load via each furnace tube 130 so that water filled in
the water tank 120 can be uniformly heated and a particular furnace
tube 130 can be prevented from being damaged earlier than other
furnace tubes 130 due to the amount of heat that is excessively
concentrated on a particular furnace tube 130.
[0037] The furnace tubes 130 provide a flow path on which a
high-temperature combustion gas is discharged, so that a
heat-exchanging process between the high-temperature combustion gas
being discharged and water filled in the water tank 120 can be
performed. According to the present invention, the flame generated
in the burner 151 directly heats the water tank 120, and water in
the water tank 120 is heated with the high-temperature combustion
gas so that a condensing boiler having high thermal efficiency is
configured.
[0038] To this end, the plurality of furnace tubes 130 are
installed to pass through the upper end plate 121 and the lower end
plate 122, respectively. Thus, open top ends of the furnace tubes
130 are connected to the firebox 111, and open bottom ends of the
furnace tubes 130 are connected to the combustion gas discharge
portion 140, and space between the open top ends and the open
bottom ends of the furnace tubes 130 formed in the water tank 120
is filled with water. In this case, lengths of all furnace tubes
130 are the same, as described above.
[0039] That is, the furnace tubes 130 of a first group are
installed along the first stage 121a of the upper end plate 121 and
the first stage 122a of the lower end plate 122 each having a
circular band shape at regular intervals, and the furnace tubes 130
of a second group that are the same as the first group are
installed along the second stage 121b of the upper end plate 121
and the second stage 122b of the lower end plate 122, and the
furnace tubes 130 of a third group that are the same as the first
group are installed along the third stage 121c of the upper end
plate 121 and the third stage 122c of the lower end plate 122.
[0040] However, wrinkled extrusion pins 130a may be inserted into
the furnace tubes 130, as illustrated in FIG. 4. If the extrusion
pins 130a are inserted into the furnace tubes 130 so that outer
circumferential surfaces of the extrusion pins 130a come in contact
with inner circumferential surfaces of the furnace tubes 130, a
contact surface area between water and the combustion gas is
increased by the extrusion pins 130a so that a heat transfer amount
is increased and a heat-exchanging rate between the combustion gas
and water is increased.
[0041] The combustion gas discharge portion 140, of which
description is omitted, is installed at the lower portion of the
boiler casing 110, and bottom ends of the furnace tubes 130
communicate with an inside of the combustion gas discharge portion
140. Thus, the high-temperature combustion gas generated when the
boiler combusts a fuel, is discharged through the furnace tubes
130, and the combustion gas, of which heat is lost when passing
through the furnace tubes 130 and of which temperature is
decreased, is discharged to the outside through the combustion gas
discharge portion 140.
[0042] However, the combustion gas discharged through the
combustion gas discharge portion 140 has a low temperature and thus
condensation water to which the combustion gas has condensed, is
generated. Thus, a drain pipe (not shown) for discharging the
condensation water may be installed at one side of the combustion
gas discharge portion 140.
INDUSTRIAL APPLICABILITY
[0043] While the invention has been shown and described with
reference to certain exemplary embodiments thereof, it will be
understood by those skilled in the art that various changes in form
and details may be made therein without departing from the spirit
and scope of the invention as defined by the appended claims.
* * * * *