KR101815987B1 - Gas boiler and exhaust closing detection method thereof - Google Patents

Gas boiler and exhaust closing detection method thereof Download PDF

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Publication number
KR101815987B1
KR101815987B1 KR1020150175620A KR20150175620A KR101815987B1 KR 101815987 B1 KR101815987 B1 KR 101815987B1 KR 1020150175620 A KR1020150175620 A KR 1020150175620A KR 20150175620 A KR20150175620 A KR 20150175620A KR 101815987 B1 KR101815987 B1 KR 101815987B1
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South Korea
Prior art keywords
exhaust
exhaust fan
output
rotational speed
temperature
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KR1020150175620A
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Korean (ko)
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KR20170068761A (en
Inventor
이돈형
정준환
이원석
윤성서
이성욱
유홍위
이신혜
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롯데알미늄 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/34—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water chamber arranged adjacent to the combustion chamber or chambers, e.g. above or at side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

The present invention relates to a gas boiler and its exhaust closing detection method, and more particularly, to a gas boiler and its exhaust closing detection method, including a combustion section for burning gas fuel to heat water, an exhaust fan for exhausting the exhaust gas generated in the combustion section to the outside, And a controller for comparing the driving signal for the exhaust fan and the output signal fed back from the exhaust fan to check whether the exhaust port is closed and to control the driving of the burner based on the inspection result, It is possible to detect the closing state of the exhaust port by using the input rotational speed and the output rotational speed fed back from the exhaust fan.

Figure R1020150175620

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gas boiler and an exhaust shut-

The present invention relates to a gas boiler and its exhaust closing detection method, and more particularly, to a gas boiler for detecting whether or not an exhaust opening is closed due to environmental factors and a method for detecting exhaust closing thereof.

In general, boilers are used as a means for receiving heating and hot water, and these boilers are divided into various types depending on their usage and capacity.

The boiler includes a combustion unit for igniting and burning the supplied fuel, a heat exchange unit for transferring the heat generated in the combustion unit to the heating water and performing heat exchange in a high temperature state, and a heating water heat exchanged in a high temperature state, And a heating pipe circulated or supplied for supply. In addition, the boiler is divided into a gas boiler and an oil boiler depending on the fuel used in the combustion.

1 is a schematic view of a general domestic gas boiler.

1, a domestic gas boiler (hereinafter referred to as a "gas boiler") according to the related art is constructed by heating water supplied from a water tank 2 through a heat exchanger 3, And the generated heating water is supplied to the heating pipe 200 through the three-way valve 5 to be heated.

When the hot water is used, the gas boiler (1) exchanges hot water via the three-way valve (5) through a hot water heat exchanger (4).

The exhaust gas generated when the combustion is performed in the burner of the gas boiler is forcibly discharged through the exhaust port.

That is, in the process of exhausting the exhaust gas generated by the burning of the burner, the exhaust port sometimes clogs due to environmental factors such as deformation or damage of the exhaust port and backward flow from the outside to the exhaust port.

If the exhaust port is clogged due to such environmental factors, harmful substances such as carbon dioxide may enter the room through the body of the gas boiler and cause safety accidents such as gas poisoning.

Since it is impossible to completely block such environmental factors, the gas boiler according to the related art is provided with a wind pressure switch for detecting exhaust clogging, and when the wind pressure switch is off, .

For example, Patent Literature 1 and Patent Literature 2 disclose a method of detecting exhaust closing of a boiler provided with a wind pressure switch.

Patent Document 1 discloses a microcomputer which is implemented in a gas boiler including a microcomputer for controlling the entire stroke, a fan for discharging the exhaust gas to the outside, a fan for introducing air required for combustion, and a wind pressure switch for detecting a backward flow, If the detected state of the wind pressure switch is on, the normal combustion stroke is maintained. If the detected wind pressure switch is in the off state, the microcomputer When the wind pressure switch is turned on, the microcomputer outputs a control signal to the fan driving unit to output the control signal to the fan rotation unit To the normal rotation speed, and when the rotation speed reaches the normal rotation speed, the rotation speed is maintained, When the rotational speed in the air pressure is switched off while returning the number of revolutions of the fan is driven with the fan to the fan rotation number of immediately before is off the upwind wind pressure switch in case of a control method for sensing the on / off state of the wind pressure switch substrate.

Patent Document 2 discloses a method for controlling the exhaust gas recirculation system, comprising: starting counting of exhaust closing detection time, which is input to the storage device through a timer in a control unit when combustion is started in the burner; Continuing to determine whether the time counted by the timer exceeds a predetermined exhaust closure detection time; Increasing the number of revolutions of the blowing fan up to the operating pressure of the wind pressure switch when a predetermined exhaust closing detection time elapses; Adjusting the opening and closing amount of the gas valve by adding a predetermined value to the current opening / closing amount control value of the gas valve; Determining whether the wind pressure switch installed in the feed / exhaust passage is in an "off" state; And a step of stopping the burner when the wind pressure switch is in the "off" state, and stopping the exhaust closing as well as stopping the detection of the exhaust closing, as well as detecting the exhaust closing state during the combustion of the boiler.

Korea Patent Registration No. 10-0259708 (issued on August 1, 2000) Korean Patent Registration No. 10-1553831 (issued September 18, 2015)

However, in the exhaust closing detection method of the boiler according to the related art, a separate wind pressure switch must be installed to detect whether the exhaust port is closed, and a complicated control process must be performed using the output signal of the wind pressure switch.

Therefore, in the method of detecting the exhaust closing of the boiler according to the related art, there is a problem that the product price is increased due to an increase in the number of components due to the installation of the wind pressure switch, and it is not possible to accurately detect whether the wind-

An object of the present invention is to provide a gas boiler which can detect whether an exhaust port is closed by using an output value and an input value of an exhaust fan installed in an exhaust port for exhausting exhaust gas, Thereby providing a detection method.

Another object of the present invention is to provide a gas boiler and its exhaust closing detection method capable of detecting whether the exhaust port is closed by removing the wind pressure switch and using the output value fed back from the exhaust fan, the exhaust temperature and the heating water temperature.

In order to achieve the above object, a gas boiler according to the present invention includes a combustion unit for burning gaseous fuel to heat water, an exhaust fan for exhausting the exhaust gas generated in the combustion unit to the outside, And a controller for comparing the driving signal for driving the exhaust fan with an output signal fed back from the exhaust fan to check whether the exhaust port is closed or not and controlling the driving of the burner based on the inspection result.

The control unit generates a driving signal of a PWM type having a predetermined voltage value and duty to drive the exhaust fan, divides the input rotation speed range of the exhaust fan into a predetermined section, And the voltage value for each input rotation number is stored in the storage unit.

The present invention further includes a remote control for inputting an operation command for controlling the operation of the gas boiler main body and displaying an operation state transmitted from the main body. When it is determined that the exhaust port is in the closed state, And controls the display unit provided on the remote control to display a screen.

The control unit may further include a sensing unit for sensing the temperature of the heating water that is heat-exchanged at the combustion unit at a high temperature, wherein the controller compares the heating water temperature sensed by the sensing unit with a predetermined set temperature, .

In order to achieve the above-mentioned object, the exhaust closing detection method of a gas boiler according to the present invention includes the steps of: (a) controlling the exhaust fan to exhaust the combustion gas by the control unit when the combustion unit is operated; (b) (C) comparing a driving signal for driving the exhaust fan with an output signal fed back to check whether the exhaust port is closed; and And controlling the driving of the combustion section.

Wherein the step (c) includes the steps of: (c1) checking whether the number of output revolutions according to the output signal of the exhaust fan corresponds to a normal range,

(c2) correcting the output rotational speed of the exhaust fan using the input rotational speed if the output rotational speed is out of the normal range as a result of the inspection in the step (c1); and

(c3) guiding an abnormal state of the exhaust fan when the output rotational speed is out of the normal range even after performing the correction of the step (c2).

According to the present invention, there is provided a method of controlling an internal combustion engine comprising the steps of: (d) sensing a temperature of heating water heat-exchanged at a high temperature in the combustion unit; (e) checking whether the sensed heating water temperature rises; And controlling the driving of the combustion section.

As described above, according to the gas boiler and its exhaust closing detection method of the present invention, it is possible to detect the closing state of the exhaust port by using the input rotational speed for driving the exhaust fan and the output rotational speed fed back from the exhaust fan Effect is obtained.

According to the present invention, when the number of output rotations relative to the number of input rotations is in the normal range, it is possible to detect the closing state of the exhaust port by using the rise of the heating water temperature.

Thus, according to the present invention, it is possible to precisely detect the closing state of the exhaust port due to environmental factors such as the backward wind or the exhaust port, and to stop the combustion so that the safety accident caused by the indoor influx of the harmful substances contained in the exhaust gas Can be prevented.

1 is a schematic view of a gas boiler according to the prior art,
2 is a block diagram of a gas boiler according to a preferred embodiment of the present invention;
3 is a flow chart for explaining steps of exhaust closing detection of a gas boiler according to a preferred embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a gas boiler and its exhaust closing detection method according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a gas boiler according to a preferred embodiment of the present invention.

As shown in FIG. 2, the gas boiler 10 according to the preferred embodiment of the present invention includes a combustion unit 11 for heating gas by burning gas fuel, an exhaust fan 11 for exhausting the exhaust gas generated in the combustion unit to the outside, (13), a driving signal for driving the exhaust fan (13) in the operating state of the combustion section (11) is compared with an output signal fed back from the exhaust fan (13) And a control section (17) for controlling the driving of the combustion section (11).

The gas boiler 10 according to the preferred embodiment of the present invention includes a water supply unit 15 and an air supply unit 16 for supplying water and air to the combustion unit 11, (14) for selectively supplying water stored in the water tank (12) to the hot water pipe or the hot water pipe, and an external power supply And a sensing unit 19 for sensing the temperature of the heating water heated by the combustion unit 11. The power supply unit 18 may include a power supply unit 18,

The combustion unit 11 may include a burner for burning gaseous fuel to generate heat at a high temperature and a heat exchanger for heating water using heat generated from the burner.

Here, a gas supply pipe for supplying gaseous fuel to the burner may be provided with a gas valve (not shown) that selectively opens and closes the gas supply pipe according to the control signal of the control unit 17.

The sensing unit 13 includes a first temperature sensor (not shown) that senses the temperature of the heating water heat exchanged at the combustion unit 11 and a second temperature sensor (not shown) that senses the temperature of the water that is returned to the combustion unit through the heating water pipe. And a temperature sensing sensor (not shown).

One side of the three sides 14 is connected to the water tank 12 to receive the water stored in the water tank 12 and is connected to at least one of the hot water pipe and the hot water pipe connected to each other in accordance with the control signal of the control unit 17 Can be selectively supplied.

The water supply unit 15 may include a pump that pumps the direct water supplied through the direct water pipe to the combustion unit 11. [

The air supply unit 16 may include an air supply fan (not shown) connected to the air supply unit to suck outside air and supply the air to the combustion unit 11.

Although the exhaust fan 13 and the air supply fan are provided in the present embodiment, the present invention is not limited thereto. The air supply fan 13 may be removed according to the capacity of the air supply fan, So that the functions of the supply fan and the exhaust fan 13 can be performed simultaneously.

The exhaust fan 13 is driven in accordance with the drive signal of the control unit 17 and outputs an output signal to the control unit 17 so as to detect whether the exhaust port is closed in accordance with a load acting on environmental factors such as deformation, (17).

To this end, an exhaust fan 13 is provided with an encoder for detecting the number of revolutions of the exhaust fan 13, or a hall sensor installed in a driving motor for driving the exhaust fan 13 to sense the rotation of the driving motor 13 .

That is, when the load acting on the exhaust fan 13 due to the backward wind or the like increases at the exhaust port, the controller for driving the driving motor outputs the output rotation of the exhaust fan 13 And decreases the output rotation speed so as to become equal to the input rotation speed when the load becomes small.

The exhaust port may be provided with an exhaust temperature sensor (not shown) for sensing the temperature of the exhaust gas.

The control unit 17 compares the input rotational speed for driving the exhaust fan 13 with the output rotational speed fed back from the exhaust fan 13 and determines that the exhaust port is closed if the output rotational speed is greater than the input rotational speed .

The control unit 17 compares the input rotational speed for driving the exhaust fan 13 with the output rotational speed corresponding to the output signal fed back from the exhaust fan 13 to determine whether the exhaust port is closed.

For example, the controller 17 may generate a PWM-type driving signal having a preset voltage value and duty to drive the exhaust fan 13. [

The control unit 17 divides the input rotation speed range of the exhaust fan 13 into a predetermined section and correlates the input rotation speed of the exhaust fan 13 with the voltage value for each section to calculate the input rotation speed voltage value It can be stored in the storage unit 30 in the form of a table.

Accordingly, the control unit 17 compares the input rotational speed and the output rotational speed by using the voltage value table for each input rotational speed interval, and if the output rotational speed is less than the preset limit rotational speed, it can be determined that the exhaust port is in the closed state .

Meanwhile, the control unit 17 is provided as a central control unit for controlling the operation of each device provided in the gas boiler 10, and is provided with an output signal fed back from the exhaust fan 13, together with the exhaust temperature, the heating water temperature, The closed state of the exhaust port can be determined in two steps.

For example, when the output frequency of the exhaust fan 13 is lower than the input rotation frequency of the exhaust fan 13 and the heating water temperature is maintained at a preset lower limit temperature for a predetermined reference time, .

Here, the set temperature may be set to a temperature obtained by subtracting a predetermined temperature (e.g., 10 DEG C) from the maximum temperature, and the reference time may be set to about 10 seconds to 60 seconds.

For example, when the output rotation speed of the exhaust fan is maintained in the normal range, the amount of load acting on the exhaust port due to the closing of the exhaust port is increased and the combustion water temperature is lowered , The control unit 17 can determine that the exhaust port is in the closed state.

The gas boiler 10 according to the preferred embodiment of the present invention receives operation commands for controlling operations of the main body provided with the respective units such as the combustion unit 11 and the control unit 17, And a remote controller 20 for displaying a status.

The remote controller 20 includes an input unit 21 installed in an indoor wall of a house or a building and receiving an operation command for operating each device provided in the main body and a display unit 21 for displaying operation states of the gas boiler 10 and various operation menus (22).

Thus, when the control unit 17 determines that the exhaust port is in the closed state, the control unit 17 can control the display unit 22 to display the guidance screen guiding the closed state of the exhaust port.

Next, referring to FIG. 3, a method of detecting exhaust closure of a gas boiler according to a preferred embodiment of the present invention will be described in detail.

FIG. 3 is a flow chart for explaining steps of exhaust closing detection of a gas boiler according to a preferred embodiment of the present invention.

3, when power is supplied through the power supply unit 18, the control unit 17 initializes each device provided in the main body, confirms the communication state with the remote control 20, And controls to prepare the heating and hot water supply operation according to the operation mode and the set temperature.

The control unit 17 opens the proportional valve (not shown) provided in the gas supply line and drives the supply fan of the air supply unit 16 and the pumps of the exhaust fan 13 and the water supply unit 15 Gas fuel, air, and water are supplied to the combustion section 11, and the ignition is operated to control the ignition section to perform the ignition stroke.

Accordingly, when the exhaust fan 13 is driven, the output rotation number of the exhaust fan 13 is fed back to the control unit 17 (S14).

Then, in step S16, the control unit 17 checks whether the number of output revolutions of the fed exhaust fan 13 falls within a preset normal range in the ignition stroke.

If the output rotation speed of the exhaust fan 13 is out of the normal range as a result of the inspection in the step S16, the control unit 17 determines that the exhaust fan 13 is in an abnormal state and displays it on the display unit 22 (S18).

On the other hand, if it is determined in step S16 that the number of output revolutions of the exhaust fan 13 falls within the normal range, the control unit 17 continuously supplies the gas fuel, air, and water to the combustion unit 11, .

In step S22, the control unit 17 checks whether the output rotation number to the input rotation number falls within the normal range in the course of performing the combustion stroke.

If it is determined in step S22 that the number of output revolutions exceeds the normal range, the control unit 17 changes the input revolution number to correct the output revolution number of the exhaust fan 13 (S24) It is checked whether the number of revolutions corresponds to the normal range (S26).

If the output rotation number of the exhaust fan 13 is out of the normal range as a result of the inspection in the step S26, the control unit 17 determines that the exhaust fan 13 is in an abnormal state and controls the display unit 22 (S28).

On the other hand, if the output rotation speed of the exhaust fan 13 is corrected to the normal range by the correction in the step S24, the first temperature sensor provided in the sensing unit 19 detects the temperature of the heating water heat exchanged in the combustion unit 11 (S30).

Then, the control unit 17 checks whether the sensed heating water temperature rises (S32).

If the heating water temperature falls in step S32, the control unit 17 determines that the exhaust fan 13 is in an abnormal state, and controls the display unit 22 to guide the screen to the screen (S34).

At this time, the control unit 17 counts the number of times the exhaust fan is determined to be in an abnormal state (S36), and checks whether or not it is equal to or less than a preset limit number (S38).

If the counted number of times is less than the threshold number of times as a result of the check in step S38, the control unit 17 controls to repeat steps S14 to S38.

On the other hand, if the counted number of times of the counting reaches the threshold number of times as a result of the inspection in step S38, the control unit 17 determines that the air outlet is in a clogged state, that is, a closed state and controls the display unit 22 to guide it to the screen. Control is passed to step S44 (S40).

On the other hand, if it is determined in step S22 that the number of output revolutions per the input revolutions falls within the normal range or the heating water temperature increases as a result of the inspection in step S32, the control unit 17 determines that the exhaust fan 13 and the exhaust port are in a normal state , It is checked whether the current heating water temperature is equal to or lower than a predetermined set temperature + constant (?) (S42).

If it is determined in step S42 that the current temperature is equal to or lower than the predetermined temperature + constant (?), The controller 17 controls to repeat steps S20 through S42.

On the other hand, if it is determined in step S42 that the current temperature exceeds the preset temperature + constant (?), The control unit 17 extinguishes the gas fuel, air and water supplied to the combustion unit 11 do.

Through the above process, the present invention can detect the closed state of the exhaust port by using the input rotation speed for driving the exhaust fan and the output rotation speed fed back from the exhaust fan by removing the existing wind pressure switch.

Further, in the present invention, when the number of output rotations relative to the input rotational speed is in the normal range, it is possible to detect the closing state of the exhaust port by using the rising temperature of the heating water.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

The present invention is applied to a gas boiler for detecting the closing state of an exhaust port by using an input rotational speed for driving an exhaust fan and an output rotational speed fed back from the exhaust fan, .

10: Gas boiler 11: Combustion part
12: Water tank 13: Exhaust fan
14: Three sides 15: Water supply part
16: air supply unit 17:
18: Power supply unit 19:
20: Remote control unit 21: Input unit
22: display section 30: storage section

Claims (7)

delete delete delete delete (a) controlling the exhaust fan to exhaust the combustion gas in the control section when the combustion section is operated,
(b) receiving an output signal according to the amount of load acting on the exhaust port from the exhaust fan,
(c1) checking whether the number of output revolutions according to the output signal of the exhaust fan is within a normal range with respect to the number of input revolutions according to the driving signal,
(c2) correcting the output rotational speed of the exhaust fan by using the input rotational speed when the output rotational speed is out of the normal range as a result of the inspection in the step (c1)
(c3) guiding an abnormal state of the exhaust fan when the output rotation number is out of the normal range even after performing the correction in the step (c2)
(d) sensing the temperature of the heating water heat-exchanged at a high temperature in the combustion unit, and
(e) guiding an abnormal state of the exhaust fan when the sensed heating water temperature is lower than a predetermined set temperature;
(f) counting the number of times the exhaust fan is determined to be in an abnormal state, and guiding the clogged state of the exhaust port when the counted number reaches the limit number. delete delete
KR1020150175620A 2015-12-10 2015-12-10 Gas boiler and exhaust closing detection method thereof KR101815987B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2723265C1 (en) * 2018-12-28 2020-06-09 Киунгдонг Навиен Ко., Лтд. Boiler and method for controlling combustion in a boiler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2723265C1 (en) * 2018-12-28 2020-06-09 Киунгдонг Навиен Ко., Лтд. Boiler and method for controlling combustion in a boiler
US11614258B2 (en) 2018-12-28 2023-03-28 Kyungdong Navien Co., Ltd. Boiler and the method for controlling combustion of the boiler

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