U.S. patent application number 14/399641 was filed with the patent office on 2015-04-30 for boiler having exhaust gas temperature control unit using temperature sensor and method for controlling same.
This patent application is currently assigned to KYUNGDONG NAVIEN., LTD.. The applicant listed for this patent is KYUNGDONG NAVIEN CO., LTD.. Invention is credited to Chang Heoi Heo.
Application Number | 20150114314 14/399641 |
Document ID | / |
Family ID | 49550893 |
Filed Date | 2015-04-30 |
United States Patent
Application |
20150114314 |
Kind Code |
A1 |
Heo; Chang Heoi |
April 30, 2015 |
BOILER HAVING EXHAUST GAS TEMPERATURE CONTROL UNIT USING
TEMPERATURE SENSOR AND METHOD FOR CONTROLLING SAME
Abstract
A boiler having a combustion and exhaust unit having a burner
for combusting fuel to generate heat, an exhaust port for
discharging the combustion residue outside the boiler, and an
exhaust pipe connected to the exhaust port, for guiding the
combustion residue into the open air; a circulation unit for
circulating hot water to provide hot water and heat for the user; a
heat exchange unit for absorbing the heat generated from the burner
to make hot water and for supplying the hot water to the
circulation part, with both ends of the heat exchange part being
connected to the circulation part; and a control unit including an
outlet temperature sensor arranged in the outlet of the heat
exchange unit, an inlet temperature sensor arranged in the inlet of
the heat exchange unit, and a controller for calculating the
temperatures measured by the inlet and outlet temperature sensors
so as to control whether to operate the boiler or not.
Inventors: |
Heo; Chang Heoi; (Seoul,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
KYUNGDONG NAVIEN CO., LTD. |
Pyeongtaek-si, Gyeonggi-do |
|
KR |
|
|
Assignee: |
KYUNGDONG NAVIEN., LTD.
Gyeonggi-do
KR
|
Family ID: |
49550893 |
Appl. No.: |
14/399641 |
Filed: |
April 5, 2013 |
PCT Filed: |
April 5, 2013 |
PCT NO: |
PCT/KR2013/002832 |
371 Date: |
November 7, 2014 |
Current U.S.
Class: |
122/14.21 |
Current CPC
Class: |
F23N 5/02 20130101; F24H
9/2035 20130101; F24D 17/0026 20130101; F24H 1/145 20130101 |
Class at
Publication: |
122/14.21 |
International
Class: |
F24H 9/20 20060101
F24H009/20 |
Foreign Application Data
Date |
Code |
Application Number |
May 10, 2012 |
KR |
10-2012-0049941 2 |
Claims
1. A boiler having an exhaust gas temperature control unit using a
temperature sensor, comprising: a combustion and exhaust unit 100
configured to include a burner 120 combusting fuel to generate
heat, an exhaust port 130 discharging combusting residues outside
the boiler, and an exhaust pipe 140 connected to the exhaust port
130 to discharge the combustion residues into the air; a
circulation unit 300 configured to circulate hot water to provide
hot water and heating to a user; a heat exchange unit 200
configured to absorb the heat generated from the burner 120 to
generate hot water and have both ends connected to the circulation
unit 300 to supply the hot water to the circulation unit 300; and a
control unit 400 configured to include an outlet temperature sensor
410 installed at an outlet of the heat exchange unit 200 to measure
a temperature of the hot water, an inlet temperature sensor 420
installed at an inlet of the heat exchange unit 200 to measure a
temperature of cold water introduced from the circulation unit 300,
and a controller 430 calculating temperature values measured by the
outlet temperature sensor 410 and the inlet temperature sensor 420
to control whether the boiler is operated.
2. The boiler of claim 1, wherein the exhaust pipe 140 is made of a
PVC material.
3. A method for controlling a temperature of exhaust gas using a
temperature sensor, comprising: initializing a calculation value of
the temperature of the exhaust gas of a controller 430 when the
boiler is in an operation condition and thus performs a combustion
operation (S10); measuring and storing, by the controller 430, a
temperature T1 of an inlet and a temperature T2 of an outlet of a
heat exchanger using an outlet temperature sensor 410 and an inlet
temperature sensor 420 (S20 and S30); calculating, by the
controller 430, the temperature of the exhaust gas (S40);
determining, by the controller 430, whether the calculated
temperature of the exhaust gas exceeds a meltable temperature of
the exhaust pipe 140 (S60); controlling, by the controller 430, a
combustion operation to stop if it is determined that the
calculated temperature of the exhaust gas exceeds the meltable
temperature of the exhaust pipe 140 (S70); and controlling, by the
controller 430, a series of combustion operations to be performed
if it is determined that the calculated temperature of the exhaust
gas is equal to or less than the meltable temperature of the
exhaust pipe 140 (S80).
4. The method of claim 3, wherein the meltable temperature of the
exhaust pipe 140 is 65.degree. C.
Description
TECHNICAL FIELD
[0001] The present invention relates to a boiler capable of using
an exhaust pipe of a PVC material, and more particularly, to a
boiler having an exhaust gas temperature control unit using a
temperature sensor which may be equipped inside a combustion unit
such as the boiler or a water heater to control a temperature of
the exhaust gas and may be equipped with an exhaust pipe of a PVC
material and a method for controlling the same.
BACKGROUND ART
[0002] A combustion unit is collectively called a boiler or a water
heater and is a device which heats water with combustion heat
generated by combusting gas or oil and supplies the heated water to
an office and heats cold direct water to supply hot water.
[0003] The combustion unit is equipped with an exhaust pipe through
which exhaust gas combusted in and then discharged from a
combustion chamber of the combustion unit is discharged. Since
houses which are built in North America such as Canada or the
United States have a relatively large scale and have boilers or
water heaters mainly installed at basements or corners thereof, in
order to draw out an intake port and an exhaust portion to the
outside thereof, there is a need to connect a plurality of PVC
pipes to the intake port and the exhaust port which are drawn out
to the outside of the house. When the exhaust pipe of stainless
steel is used, there is a problem in that much installation cost
may be required and economical feasibility may be degraded.
[0004] In this case, since the exhaust pipe does not permit a use
of a PVC product as a single item of a product in the country, the
exhaust pipe is mainly made of stainless steel; however, the
exhaust pipe may be made of PVC at the time of being installed as a
complex exhaust system due to a change in relevant regulations from
April, 2012 and is scheduled to be changed to use the PVC as a
single product from now on.
[0005] Therefore, when the exhaust pipe of the combustion unit
intends to be mainly used as the PVC pipe to save the installation
cost, the respective pipes have connection portions which need to
be bonded to each other by bond (PVC cement).
[0006] The PVC pipe is permitted only to products in which the
temperature of exhaust gas of the combustion unit is equal to or
less than of 65.degree. C. or less. However, there may be a tool
using the water heater for heating, and the case in which the
discharged exhaust gas exceeds 65.degree. C. frequently occurs.
Thus, when the exhaust gas exceeds 65.degree. C., the PVC pipe or
the connected portion of the PVC pipe is melted and therefore the
exhaust gas is leaked, thereby causing safety accidents.
[0007] Therefore, in order to limit a setting temperature of the
water heater and the boiler to supplement these problems, a
separate control unit needs to be installed and therefore a
structure may be complicated and cost may be increased, and the
installation cost may be increased due to the use of a safe CPVC
pipe which may withstand the exhaust gas which reaches about
90.degree. C.
DISCLOSURE
Technical Problem
[0008] An object of the present invention is to provide a boiler
having an exhaust gas temperature control unit using a temperature
sensor in which a PVC pipe may be installed at an exhaust port by
controlling a temperature of exhaust gas to be equal to or less
than 65.degree. C. by measuring a temperature of an inlet of a heat
exchanger and a temperature of an outlet of the heat exchanger and
a method for controlling the same.
Technical Solution
[0009] To achieve the above-mentioned technical problem, according
to an exemplary embodiment of the present invention, there is a
provided a boiler having an exhaust gas temperature control unit
using a temperature sensor, including: a combustion and exhaust
unit configured to include a burner combusting fuel to generate
heat, an exhaust port discharging combusting residues outside the
boiler, and an exhaust pipe connected to the exhaust port to
discharge the combustion residues into the air; a circulation unit
configured to circulate hot water to provide hot water and heating
to a user; a heat exchange unit configured to absorb the heat
generated from the burner to generate hot water and have both ends
connected to the circulation unit to supply the hot water to the
circulation unit; and a control unit configured to include an
outlet temperature sensor installed at an outlet of the heat
exchange unit to measure a temperature of the hot water, an inlet
temperature sensor installed at an inlet of the heat exchange unit
to measure a temperature of cold water introduced from the
circulation unit, and a controller calculating temperature values
measured by the outlet temperature sensor and the inlet temperature
sensor to control whether the boiler is operated.
[0010] Further, the exhaust pipe may be made of a PVC material.
[0011] To achieve the above-mentioned technical problem, according
to an exemplary embodiment of the present invention, there is a
provided a method for controlling a temperature of exhaust gas
using a temperature sensor, including: initializing a calculation
value of the temperature of the exhaust gas of a controller when
the boiler is in an operation condition and thus performs a
combustion operation; measuring and storing, by the controller, a
temperature of an inlet and a temperature of an outlet of a heat
exchanger using an outlet temperature sensor and an inlet
temperature sensor; calculating, by the controller, the temperature
of the exhaust gas; determining, by the controller, whether the
calculated temperature of the exhaust gas exceeds a meltable
temperature of the exhaust pipe; controlling, by the controller, a
combustion operation to stop if it is determined that the
calculated temperature of the exhaust gas exceeds the meltable
temperature of the exhaust pipe; and controlling, by the
controller, a series of combustion operations to be performed if it
is determined that the calculated temperature of the exhaust gas is
equal to or less than the meltable temperature of the exhaust
pipe.
[0012] Further, the meltable temperature of the exhaust pipe may be
65.degree. C.
Advantageous Effects
[0013] According to the boiler having an exhaust gas temperature
control unit using a temperature sensor and the method for
controlling the same according to the embodiment of the present
invention, the cheap PVC may be used as the exhaust pipe, thereby
facilitating the installation, and the existing temperature sensor
may perform the control and thus the use of the separate controller
is not required, thereby saving the installation cost.
DESCRIPTION OF DRAWINGS
[0014] The above and other objects, features and advantages of the
present invention will become apparent from the following
description of preferred embodiments given in conjunction with the
accompanying drawings, in which:
[0015] FIG. 1 is a diagram having an exhaust gas temperature
control unit using a temperature sensor according to an embodiment
of the present invention; and
[0016] FIG. 2 is a flow chart for describing a method for
controlling a temperature of exhaust gas according to an embodiment
of the present invention.
BEST MODE
[0017] In order to fully understand the present invention,
exemplary embodiments of the invention will be described with
reference to the accompanying drawings. The embodiments of the
present invention may be modified in many different forms and the
scope of the invention should not be limited to the embodiments set
forth herein. Rather, these embodiments are provided so that this
disclosure will be thorough and complete, and will fully convey the
concept of the invention to those skilled in the art. In the
drawings, the shapes and dimensions may be exaggerated for clarity.
It is to be noted that the same reference numerals will be used to
designate the same components in each drawing. Further, detailed
descriptions of well-known functions or constructions will be
omitted so as not to obscure the description of the present
invention with unnecessary detail.
[0018] First, referring to FIG. 1, a boiler having an exhaust gas
temperature control unit using a temperature sensor is configured
to include a combustion and exhaust unit 100 configured to combust
supplied fuel or discharge combusted smoke, combustion residues, or
the like, outside the boiler, a heat exchange unit 200 configured
to absorb heat generated from the combustion and exhaust unit 100
to supply hot water, and a circulation unit 400 configured to
circulate the hot water supplied from the heat exchange unit 200
and provide the hot water and heating to a user, and a controller
400 configured to control whether the boiler is operated.
[0019] The combustion and exhaust unit 100 includes an intake port
110 configured to suck air required for combustion, a burner 120
configured to combust fuel to generate heat, an exhaust port 130
configured to discharge the combustion residues, and the like from
the burner 120 to the outside of the boiler, and an exhaust pipe
140 configured to be connected to the exhaust port 130 to discharge
the exhaust gas into the air.
[0020] Therefore, the air required for combustion is transferred to
the burner 120 through the intake port 110 and passes through the
exhaust port 130 and the exhaust pipe 140 and is then discharged
into the air through the heat exchange unit 200.
[0021] The heat exchange unit 200 absorbs heat generated from the
burner 120 to generate hot water and has both ends connected to the
circulation unit 300 to supply the hot water to the circulation
unit 300.
[0022] The circulation unit 300 is supplied with the hot water from
the heat exchange unit 200 to provide heating and hot water to a
user. In this case, the circulation unit 300 includes a circulation
pump 310 configured to again return used relatively cold water to
the heat exchange unit 200 and circulate the cold water.
[0023] The control unit 400 includes an outlet temperature sensor
configured to be installed at an outlet of the heat exchange unit
200 to measure a temperature of hot water, an inlet temperature
sensor 420 configured to be installed at an inlet of the heat
exchange unit 200 to measure a temperature of cold water introduced
from the circulation unit 300, and a controller 430 configured to
calculate temperature values measured by the outlet temperature
sensor 410 and the inlet temperature sensor 430 to control whether
the boiler is operated.
[0024] Therefore, it is possible to detect the temperature of the
exhaust gas discharged through the exhaust port 130 by calculating
the temperature of hot water absorbing the heat generated from the
burner 120 and the relatively cold water used by the user.
[0025] The temperature of the exhaust gas may be calculated by the
following Equation.
Temperature of Exhaust Gas=(Temperature of Inlet of Heat
Exchanger+Temperature of Outlet of Heat Exchanger)/2 Equation)
[0026] As the exhaust pipe 140 configured to be connected to the
exhaust port 130 to discharge the exhaust gas into the air is made
of PVC, the exhaust pipe 140 is permitted to be used only within a
range of meltable temperature of the exhaust pipe. In consideration
of this, the exhaust pipe 140 is permitted to be used when the
current temperature of the exhaust gas of the combustion unit is
equal to or less than about 65.degree. C. When the exhaust gas
exceeds 65.degree. C., the PVC pipe or the connected portion of the
PVC pipe is melted and therefore the exhaust gas is leaked, thereby
causing safety accidents.
[0027] Therefore, the controller 430 calculates the temperature
values of the outlet temperature sensor 410 and the inlet
temperature sensor 420 to monitor the temperature of the exhaust
gas at all times and when the current temperature of the exhaust
gas exceeds 65.degree. C. which is the meltable temperature of the
exhaust pipe 140 of a PVC material, the burner 120 is turned off to
control the temperature of the exhaust gas to stop the combustion
and the like, thereby preventing safety accidents from
occurring.
[0028] Further, when the current temperature of the exhaust gas is
equal to or less than about 65.degree. C., the re-combustion is
performed and therefore the installation is simple due to the use
of the exhaust pipe 140 of the PVC material, and the existing
temperature sensor and the cheap controller are used and therefore
a separate expensive control unit is not required, thereby reducing
the installation cost.
[0029] Hereinafter, a method for controlling a temperature of
exhaust gas using a temperature sensor according to an embodiment
of the present invention will be described with reference to FIG.
2.
[0030] When the boiler is in an operation condition ant thus first
performs a combustion operation, that is, when the circulation pump
310 configured in the boiler is operated, the controller 430 in the
boiler initializes the calculation value of the temperature of the
exhaust gas (see S10).
[0031] Further, the controller 430 measures and stores an inlet
temperature T1 and an outlet temperature T2 of the heat exchanger
using the outlet temperature sensor 410 and the inlet temperature
sensor 420 (see S20 and S30).
[0032] In the next step, the controller 430 calculates the
temperature of the exhaust gas using the following Equation (see
S40).
Temperature T2 of Inlet of Heat Exchanger+Temperature T1 of Outlet
of Heat Exchanger)/2 Equation)
[0033] Therefore, the controller 430 determines whether the
calculated temperature of the exhaust gas exceeds the meltable
temperature of the exhaust pipe 140 and if it is determined that
the meltable temperature exceeds the meltable temperature of the
exhaust pipe 140, the combustion operation stops to keep the
temperature of the exhaust gas at the meltable temperature of the
exhaust pipe 140 at all times, such that the exhaust pipe 140 of
the PVC material may be used (see S60 and S70).
[0034] Meanwhile, in the determining whether the temperature of the
exhaust gas exceeds the meltable temperature of the exhaust pipe
140, when the temperature of the exhaust gas is equal to or less
than the meltable temperature of the exhaust pipe 140, a series of
combustion operations, that is, firing and combustion processes are
performed (see S80).
[0035] The embodiments of the boiler having an exhaust gas
temperature control unit using a temperature sensor and the method
for controlling the same as described above are only the example.
Therefore, it will be appreciated by those skilled in the art that
various modifications and equivalent other embodiments are possible
from the present invention. Therefore, it may be appreciated that
the present invention is not limited to the forms mentioned in the
above detailed description. Accordingly, the actual technical
protection scope of the present invention must be determined by the
spirit of the appended claims. Further, it is to be construed that
the present invention includes all the changes, equivalents, and
substitutions which are defined in the appending claims.
EXPLANATION OF SYMBOLS
[0036] 110: Combustion and exhaust unit [0037] 110: Intake port
[0038] 120: Burner [0039] 130: Exhaust port [0040] 140: Exhaust
pipe [0041] 200: Heat exchange unit [0042] 300: Circulation unit
[0043] 310: Circulation pump [0044] 400: Control unit [0045] 410:
Outlet temperature sensor [0046] 420: Inlet temperature sensor
[0047] 430: Controller
* * * * *