EP2940391A1 - Freeze protection method for heating pipe and hot water pipe of boiler - Google Patents

Freeze protection method for heating pipe and hot water pipe of boiler Download PDF

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Publication number
EP2940391A1
EP2940391A1 EP13867829.7A EP13867829A EP2940391A1 EP 2940391 A1 EP2940391 A1 EP 2940391A1 EP 13867829 A EP13867829 A EP 13867829A EP 2940391 A1 EP2940391 A1 EP 2940391A1
Authority
EP
European Patent Office
Prior art keywords
heating
boiler
hot water
pipe
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13867829.7A
Other languages
German (de)
French (fr)
Other versions
EP2940391B1 (en
EP2940391A4 (en
Inventor
Young Bum Kim
Su Dae PARK
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Kyungdong Navien Co Ltd
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Kyungdong Navien Co Ltd
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Publication of EP2940391A1 publication Critical patent/EP2940391A1/en
Publication of EP2940391A4 publication Critical patent/EP2940391A4/en
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Classifications

    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/136—Defrosting or de-icing; Preventing freezing
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/32—Control of valves of switching valves
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/0095—Devices for preventing damage by freezing

Definitions

  • a circulation pump (140) forcibly circulated by a circulation pump (140) and absorbs combustion heat of a burner (160) at a heating heat exchanger (110) such that its temperature increases and then it is supplied to a heating pipe (200) by the operation of a three-way valve (120) to be used for internal heating, while during hot water use the circulation pump (140) circulates the water flowing through the inner pipe in order to supply heat absorbed at the heating heat exchanger (110) to a hot water supply heat exchanger (130) such that direct water flowing into the direct water inlet absorbs the heat retained by the hot water supply heat exchanger (130), thereby supplying hot water through the hot water outlet.
  • a circulation pump (140) circulates the water flowing through the inner pipe in order to supply heat absorbed at the heating heat exchanger (110) to a hot water supply heat exchanger (130) such that direct water flowing into the direct water inlet absorbs the heat retained by the hot water supply heat exchanger (130), thereby supplying hot water through the hot water outlet.
  • Such a boiler has a freeze protection function in which the temperature of the internal pipe water is detected through a heating water temperature sensor (150) when one is away, and if temperature of the water flowing through the inner pipe drops below the freeze protection set temperature, that is, the set temperature at which the boiler automatically operates in order to prevent freezing of the boiler when temperature of the water in the pipe drops below a certain temperature, the controller (100) operates the boiler to increase temperature of the internal pipe water as well as to circulate this water through the heating pipe (200), and the boiler is stopped if the detected temperature is above the specific set temperature.
  • This conventional freeze protection function aims only at freeze protection of the heating pipe in consideration of the low insulation effect of the existing buildings, however recent buildings have improved external insulation effect which reduces risk of the heating pipe freezing.
  • freezing of the hot water pipe frequently occurs during cold weather in winter even when lagging material is applied thereon, which increases inconveniences in using hot water.
  • Patent Literature 1 Korean Patent Application No. 10-2004-0037899
  • the present invention which aims to solve the above-described technical problem comprises, a controller comprising a single-chip microcomputer to control overall operation of the boiler, a heating water temperature sensor detecting temperature of the heating water within the boiler and inputting the information into the controller, a heating heat exchanger where heat exchange between heat energy supplied from the burner and the heating water occurs, a hot water supply heat exchanger where heat exchange between heating water and direct water occurs during operation of the hot water mode, a circulation pump accelerating heat exchange by circulating the heating water, and a three-way valve switching the boiler to a heating mode or a hot water mode according to the controller's control, characterized in that the controller switches the three-way valve to a hot water mode to prevent freezing of the hot water pipe if the temperature of the heating water detected by the heating water temperature sensor falls below the preset freeze protection temperature, and switches the three-way valve to a heating mode to prevent freezing of the heating pipe if the temperature of the heating water reaches the preset combustion stop temperature.
  • the freeze protection method for heating pipe and hot water pipe of a boiler comprises the steps of: (a) converting the three-way valve into a hot water mode and carrying out a combustion operation of the boiler via a controller's control, if the temperature of heating water falls below a preset freeze protection temperature, and circulating the heating water through a closed loop including a circulation pump, a heating heat exchanger, a three-way valve and a hot water supply heat exchanger by driving the circulation pump; and (b) switching the three-way valve into a heating mode and performing an extinguishing operation of the boiler via the controller's control, if the temperature of the heating water is higher than a preset combustion stop temperature, and circulating the heating water through the heating pipe by the driving of the circulation pump.
  • the preset combustion stop temperature for switching the three-way valve to the heating mode at a maximum temperature that can be raised in the closed loop including the circulation pump, the heating heat exchanger, the three-way valve and the hot water supply heat exchanger.
  • freeze protection method for heating pipe and hot water pipe of a boiler Using the freeze protection method for heating pipe and hot water pipe of a boiler according to the present invention, freezing of the heating pipe as well as freezing of the hot water pipe can be prevented in advance, and the inconvenience of using hot water during winter due to the freezing of the hot water pipe can be overcome.
  • the controller (100) which comprises a single-chip microcomputer to control overall operation of the boiler, not only controls the ignition device to allow operation of the boiler and detects ignition state of the flame detection sensor to carry out safety control such as stopping gas supply during non-ignition, but also receives boiler state information from various sensors through the sensor input unit for optimal control of the boiler in order to carry out optimal control in consideration of the operation state of the boiler and the external environment.
  • the heating pipe and the hot water pipe can be prevented from freezing by receiving the heating water temperature detected at the heating water temperature sensor (150) and comparing this with the preset temperature to control the three-way valve (120).
  • heat energy received from the burner which is at ignition state, is used to carry out heat exchange with the heating water, and in the hot water supply heat exchanger (130) heat exchange occurs between the heating water and the direct water when heating mode is operated for the boiler.
  • FIG. 2 is a flow diagram showing the freeze protection method for heating pipe and hot water pipe of a boiler according to the present invention.
  • the freeze protection method for heating pipe and hot water pipe of a boiler of the present invention will be described in detail with reference to FIG. 2.
  • the controller (100) first stops the boiler. That is, the fuel supplied to the burner (160) is blocked to stop combustion, and operation of the circulation pump (140) is stopped to stop circulation of the water in both the boiler and the heating pipe (200).
  • the controller (100) regularly checks the temperature detected by the heating water temperature sensor (150) to compare it with the preset freeze protection temperature.
  • the preset freeze protection temperature it is generally preferable to set the preset freeze protection temperature to a temperature at which the water in the pipe can freeze.
  • the controller (100) switches the three-way valve (120) to a hot water mode and supplies fuel to the burner (160) for combustion in order to create heat and also operates the circulation pump (140) so that the heating water absorbs heat at the heating heat exchanger (110) thereby increasing temperature of the heating water, and the heated heating water circulates through a closed loop including the circulation pump (140), the heating heat exchanger (110), the three-way valve (120), and the hot water supply heat exchanger (130).
  • the preset combustion stop temperature for switching the three-way valve to a heating mode at a maximum temperature that can be reached in the closed loop including the circulation pump (140), the heating heat exchanger (110), the three-way valve (120) and the hot water supply heat exchanger (130).
  • the boiler does not carry out the combustion operation after the extinguishing operation and the three-way valve (120) are switched to the heating mode. Only the circulation pump (140) is operated to circulate the heated heating water through the heating pipe (200), thereby preventing freezing of the heating pipe (200).
  • the above method allows freeze protection of not only the heating pipe but also the hot water pipe.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The present invention relates to a freeze protection method of a gas boiler, which can prevent a heating pipe from freezing by using a heating water temperature sensor that is disposed in the boiler and can prevent a hot water pipe from freezing through the control of a three-way valve. The freeze protection method for a heating pipe and a hot water pipe of a boiler comprises the steps of: (a) converting the three-way valve (120) into a hot water mode and carrying out a combustion operation of the boiler, if the temperature of heating water falls below a preset freeze protection set temperature, and circulating the heating water through a closed loop including a circulation pump (140), a heating heat exchanger (110), the three-way valve (120) and a hot-water supply heat exchanger (130) by driving the circulation pump (140); and (b) converting the three-way valve (120) into a heating mode and performing an extinguishing operation of the boiler, if the temperature of the heating water is higher than a preset constant temperature, and circulating the heating water to the heating pipe (200) by the driving of the circulation pump (140). Accordingly, in addition to a freeze protection function for the heating pipe, freezing of the hot water pipe can be prevented, thereby overcoming the inconvenience of using hot water due to the freezing of the hot water pipe during winter. Also, since it is unnecessary to continuously carry out the combustion operation of the boiler in order to prevent the heating pipe and the hot water pipe from freezing, there is no significant difference in the amount of gas used when compared with existing freeze protection functions.

Description

    [TECHNICAL FIELD]
  • The present invention relates to a freeze protection method for heating pipe and hot water pipe of a boiler, and, specifically, to a freeze protection method for heating pipe and hot water pipe of a boiler which can prevent a heating pipe from freezing by using a heating water temperature sensor that is disposed in the boiler and can also prevent a hot water pipe from freezing through the control of a three-way valve.
    • [BACKGROUND OF THE INVENTION]
  • Referring to Figure 1 of a typical gas boiler, during heating, water flowing through the inner pipe is forcibly circulated by a circulation pump (140) and absorbs combustion heat of a burner (160) at a heating heat exchanger (110) such that its temperature increases and then it is supplied to a heating pipe (200) by the operation of a three-way valve (120) to be used for internal heating, while during hot water use the circulation pump (140) circulates the water flowing through the inner pipe in order to supply heat absorbed at the heating heat exchanger (110) to a hot water supply heat exchanger (130) such that direct water flowing into the direct water inlet absorbs the heat retained by the hot water supply heat exchanger (130), thereby supplying hot water through the hot water outlet.
  • Such a boiler has a freeze protection function in which the temperature of the internal pipe water is detected through a heating water temperature sensor (150) when one is away, and if temperature of the water flowing through the inner pipe drops below the freeze protection set temperature, that is, the set temperature at which the boiler automatically operates in order to prevent freezing of the boiler when temperature of the water in the pipe drops below a certain temperature, the controller (100) operates the boiler to increase temperature of the internal pipe water as well as to circulate this water through the heating pipe (200), and the boiler is stopped if the detected temperature is above the specific set temperature.
  • This conventional freeze protection function aims only at freeze protection of the heating pipe in consideration of the low insulation effect of the existing buildings, however recent buildings have improved external insulation effect which reduces risk of the heating pipe freezing. In contrast, freezing of the hot water pipe frequently occurs during cold weather in winter even when lagging material is applied thereon, which increases inconveniences in using hot water. Thus, there is an emerging need to prevent freezing of the hot water pipe.
    • [Prior Art] [Patent Literature]
  • (Patent Literature 1) Korean Patent Application No. 10-2004-0037899
    • [DISCLOSURE OF INVENTION] [TECHNICAL PROBLEM]
  • The present invention has been made in view of the above information, and it is directed to a freeze protection method for heating pipe and hot water pipe of a boiler, which can prevent heating pipe from freezing by using a heating water temperature sensor that is disposed in the boiler and also prevent a hot water pipe from freezing through the control of a three-way valve.
    • [TECHNICAL SOLUTION]
  • The present invention, which aims to solve the above-described technical problem comprises, a controller comprising a single-chip microcomputer to control overall operation of the boiler, a heating water temperature sensor detecting temperature of the heating water within the boiler and inputting the information into the controller, a heating heat exchanger where heat exchange between heat energy supplied from the burner and the heating water occurs, a hot water supply heat exchanger where heat exchange between heating water and direct water occurs during operation of the hot water mode, a circulation pump accelerating heat exchange by circulating the heating water, and a three-way valve switching the boiler to a heating mode or a hot water mode according to the controller's control, characterized in that the controller switches the three-way valve to a hot water mode to prevent freezing of the hot water pipe if the temperature of the heating water detected by the heating water temperature sensor falls below the preset freeze protection temperature, and switches the three-way valve to a heating mode to prevent freezing of the heating pipe if the temperature of the heating water reaches the preset combustion stop temperature.
  • The freeze protection method for heating pipe and hot water pipe of a boiler comprises the steps of: (a) converting the three-way valve into a hot water mode and carrying out a combustion operation of the boiler via a controller's control, if the temperature of heating water falls below a preset freeze protection temperature, and circulating the heating water through a closed loop including a circulation pump, a heating heat exchanger, a three-way valve and a hot water supply heat exchanger by driving the circulation pump; and (b) switching the three-way valve into a heating mode and performing an extinguishing operation of the boiler via the controller's control, if the temperature of the heating water is higher than a preset combustion stop temperature, and circulating the heating water through the heating pipe by the driving of the circulation pump.
  • In addition, preferably, it may include a further step of stopping operations of the circulation pump and the boiler if a preset certain amount of time has passed after the extinguishing operation.
  • It is preferable to set the preset combustion stop temperature for switching the three-way valve to the heating mode at a maximum temperature that can be raised in the closed loop including the circulation pump, the heating heat exchanger, the three-way valve and the hot water supply heat exchanger.
    • [ADVANTAGEOUS EFFECTS]
  • Using the freeze protection method for heating pipe and hot water pipe of a boiler according to the present invention, freezing of the heating pipe as well as freezing of the hot water pipe can be prevented in advance, and the inconvenience of using hot water during winter due to the freezing of the hot water pipe can be overcome.
  • In addition, since it is unnecessary to continuously carry out the combustion operation of the boiler in order to prevent the heating pipe and the hot water pipe from freezing, there is no significant difference in the amount of gas used when compared with existing freeze protection functions.
    • [BRIEF DESCRIPTION OF THE DRAWINGS]
    • FIG. 1 is a schematic diagram showing the operation of a typical gas boiler.
    • FIG. 2 is a flow diagram showing the freeze protection method for heating pipe and hot water pipe of a boiler according to the present invention.
    [DESCRIPTION OF THE PREFERRED EMBODIMENTS]
  • Hereinafter, preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiment of the present invention can be modified into various forms, and it should be understood that the scope of present invention is not limited to the embodiments whose detailed description is provided below. The following embodiments are given to provide a more detailed description of the preset invention to those skilled in the art. Therefore, shapes of the elements, etc. may be exaggerated in the drawings for a clearer understanding of the description. Identical or corresponding elements in each drawing may be designated with same reference signs. In addition, description of known functions or configurations determined to hinder understanding of the present invention are omitted.
  • Hereafter, an exemplary embodiment of the freeze protection method for heating pipe and hot water pipe of a boiler of the present invention will be described in detail with reference to the accompanying drawings.
  • FIG. 1 is a schematic diagram showing the operation of a typical gas boiler.
  • First, configuration of a boiler where the freeze protection method for heating pipe and hot water pipe of a boiler of the present invention can be used will be described with reference to FIG. 1.
  • The controller (100), which comprises a single-chip microcomputer to control overall operation of the boiler, not only controls the ignition device to allow operation of the boiler and detects ignition state of the flame detection sensor to carry out safety control such as stopping gas supply during non-ignition, but also receives boiler state information from various sensors through the sensor input unit for optimal control of the boiler in order to carry out optimal control in consideration of the operation state of the boiler and the external environment. In particular, according to the present invention, the heating pipe and the hot water pipe can be prevented from freezing by receiving the heating water temperature detected at the heating water temperature sensor (150) and comparing this with the preset temperature to control the three-way valve (120).
  • In the heating heat exchanger (110) heat energy received from the burner, which is at ignition state, is used to carry out heat exchange with the heating water, and in the hot water supply heat exchanger (130) heat exchange occurs between the heating water and the direct water when heating mode is operated for the boiler.
  • The three-way valve (120) is controlled by the controller (100) so that the boiler can be operated in heating mode or hot water mode. When the boiler operates in heating mode, the heating water heated at the heating heat exchanger (110) is supplied to the heating pipe (200) through the three-way valve (120) by the operation of the circulation pump (140), returned again, and recirculates by passing through the expansion tank (180). On the other hand, when the boiler operates in hot water mode, heating water circulates through a closed loop including the heating heat exchanger (110), the three-way valve (120), the hot water supply heat exchanger (130), and the circulation pump (140).
  • FIG. 2 is a flow diagram showing the freeze protection method for heating pipe and hot water pipe of a boiler according to the present invention. Hereafter, the freeze protection method for heating pipe and hot water pipe of a boiler of the present invention will be described in detail with reference to FIG. 2.
  • In case the boiler is set to Away Mode by the user, the controller (100) first stops the boiler. That is, the fuel supplied to the burner (160) is blocked to stop combustion, and operation of the circulation pump (140) is stopped to stop circulation of the water in both the boiler and the heating pipe (200).
  • In this state, the controller (100) regularly checks the temperature detected by the heating water temperature sensor (150) to compare it with the preset freeze protection temperature. Here, it is generally preferable to set the preset freeze protection temperature to a temperature at which the water in the pipe can freeze.
  • After comparing the above temperatures, if temperature of the heating water is higher than the freeze protection set temperature, temperature of the heating water is continuously checked, and if the temperature of the heating water is lower than the freeze protection set temperature, the controller (100) switches the three-way valve (120) to a hot water mode and supplies fuel to the burner (160) for combustion in order to create heat and also operates the circulation pump (140) so that the heating water absorbs heat at the heating heat exchanger (110) thereby increasing temperature of the heating water, and the heated heating water circulates through a closed loop including the circulation pump (140), the heating heat exchanger (110), the three-way valve (120), and the hot water supply heat exchanger (130).
  • At this time, in the hot water supply heat exchanger (130) heat is transferred from the heated heating water to the heating pipe (210), thereby preventing freezing of the heating pipe (210).
  • Afterwards, when temperature of the heating water reaches the preset combustion stop temperature via the combustion operation of the boiler, the controller (100) blocks the fuel to carry out extinguishing operation and switches the three-way valve (120) to heating mode again.
  • Here, it is preferable to set the preset combustion stop temperature for switching the three-way valve to a heating mode at a maximum temperature that can be reached in the closed loop including the circulation pump (140), the heating heat exchanger (110), the three-way valve (120) and the hot water supply heat exchanger (130).
  • The boiler does not carry out the combustion operation after the extinguishing operation and the three-way valve (120) are switched to the heating mode. Only the circulation pump (140) is operated to circulate the heated heating water through the heating pipe (200), thereby preventing freezing of the heating pipe (200).
  • Therefore, when compared with existing freeze protection functions, by using similar amounts of fuel the above method allows freeze protection of not only the heating pipe but also the hot water pipe.
  • Also, it is possible to include a step of returning the boiler to a stopped state by stopping operation of the circulation pump (140) after some time has passed, preferably some time after the extinguishing operation, that is, the time taken to sufficiently circulate the heating water for freeze protection of the heating pipe.
  • The above description relating to a preferred embodiment of a freeze protection method for heating pipe and hot water pipe of a boiler according to the present invention is merely an example. It will be understood by the skilled person in the art that various modifications and other similar embodiments based on the description provided can be made. Therefore, it is clear that the present invention is not limited to the preferred embodiment described above. Accordingly, the scope of the invention to be protected must be based on the technical principles of the accompanying claims. Further, it must be understood that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
    • [REFERENCE SIGNS]
    • 100: Controller 110: Heating Heat Exchanger
    • 120: Three-Way Valve 130: Hot Water Heat Exchanger
    • 140: Circulation Pump 150: Heating Water Temperature Sensor
    • 160: Burner 170: Fan
    • 180: Expansion Tank 190: Hot Water Temperature Sensor
    • 200: Heating Pipe 210: Hot Water Pipe

Claims (4)

  1. A freeze protection method for heating pipe and hot water pipe of a boiler, comprising the steps of:
    (a) converting a three-way valve into a hot water mode and carrying out a combustion operation of the boiler via a controller's control, if temperature of heating water falls below a preset freeze protection temperature, and circulating the heating water through a closed loop including a circulation pump, a heating heat exchanger, the three-way valve and a hot water supply heat exchanger by driving the circulation pump; and
    (b) converting the three-way valve to a heating mode and performing an extinguishing operation of the boiler via the controller's control, if temperature of the heating water is higher than a preset constant temperature, and circulating the heating water to the heating pipe by driving the circulation pump.
  2. The freeze protection method for heating pipe and hot water pipe of a boiler as claimed in claim 1, further comprising the step of stopping operations of the circulation pump and the boiler if a preset certain amount of time has passed after the extinguishing operation.
  3. The freeze protection method for heating pipe and hot water pipe of a boiler as claimed in claim 1 or 2, wherein temperature of the heating water is detected by a heating water temperature sensor disposed in the boiler.
  4. The freeze protection method for heating pipe and hot water pipe of a boiler as claimed in claim 1 or 2, wherein the preset constant temperature for switching the three-way valve to the heating mode is a maximum temperature that can be reached in the closed loop including the circulation pump, the heating heat exchanger, the three-way valve, and the hot water supply heat exchanger.
EP13867829.7A 2012-12-26 2013-09-13 Freeze protection method for heating pipe and hot water pipe of boiler Active EP2940391B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120153945A KR101436842B1 (en) 2012-12-26 2012-12-26 Method for preventing freezing of heating pipe and hot-water pipe of boiler
PCT/KR2013/008315 WO2014104537A1 (en) 2012-12-26 2013-09-13 Freeze protection method for heating pipe and hot water pipe of boiler

Publications (3)

Publication Number Publication Date
EP2940391A1 true EP2940391A1 (en) 2015-11-04
EP2940391A4 EP2940391A4 (en) 2016-07-27
EP2940391B1 EP2940391B1 (en) 2018-05-23

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EP13867829.7A Active EP2940391B1 (en) 2012-12-26 2013-09-13 Freeze protection method for heating pipe and hot water pipe of boiler

Country Status (5)

Country Link
EP (1) EP2940391B1 (en)
KR (1) KR101436842B1 (en)
CN (1) CN104838209B (en)
RU (1) RU2616580C2 (en)
WO (1) WO2014104537A1 (en)

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JP6745039B2 (en) * 2016-11-25 2020-08-26 株式会社ノーリツ Heating water heater
RU186997U1 (en) * 2017-06-01 2019-02-12 Лунгулло Денис Андреевич HEATING DEVICE
CN108302770A (en) * 2018-01-18 2018-07-20 广东超人节能厨卫电器有限公司 Automatic anti-freezing method for zero-cold-water gas hot water system
KR102449159B1 (en) * 2018-05-08 2022-09-30 주식회사 경동나비엔 Boiler for heating and hot water and its control method
CN110056857B (en) * 2019-04-28 2020-03-31 中国电建集团山东电力建设有限公司 Anti-freezing method for power station boiler in alpine region
KR102887235B1 (en) * 2020-01-30 2025-11-14 엘지전자 주식회사 Heat pump and method thereof
CN115013967B (en) * 2022-06-24 2025-03-18 上海林内有限公司 Heating furnace capable of using both zero cold water and heating hot water and control method thereof

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63207948A (en) * 1987-02-20 1988-08-29 Rinnai Corp Hot-water supplying apparatus of instantaneous supply type
US5590832A (en) * 1994-07-15 1997-01-07 Fiedrich; Joachim Hydronic heating system with high and low temperature shock protection
CN1239212A (en) * 1998-06-16 1999-12-22 陈仁亨 Household gas heater of water for heating
KR100279883B1 (en) * 1998-12-31 2001-02-01 김우련 Insulation control method of gas boiler
KR20010003836A (en) * 1999-06-25 2001-01-15 전주범 Method preventing freezing-destruction of cold water and warm water tube for gas-boiler
NL1015319C2 (en) * 2000-05-26 2001-11-27 Enatec Micro Cogen B V Device and method for the coupled generation of heat and electricity.
KR100474633B1 (en) 2002-10-30 2005-03-11 주식회사 엠투시스 Opening and closing mechanism of cellular phone
CN2828664Y (en) * 2005-07-21 2006-10-18 中山华帝燃具股份有限公司 Antifreezing device for gas water heater
KR100709581B1 (en) * 2005-09-22 2007-04-20 주식회사 경동나비엔 Anomaly Detection Method of Three-way Valve in Boiler
KR100756910B1 (en) * 2006-07-19 2007-09-07 최진민 Freeze and corrosion protection hot water heating boiler
KR100805551B1 (en) * 2006-10-17 2008-02-20 주식회사 경동나비엔 How to prevent condensation of boiler flue flue
KR100812937B1 (en) * 2007-05-10 2008-03-11 주식회사 경동나비엔 Hot water supply system
KR100852988B1 (en) * 2007-05-16 2008-08-20 주식회사 경동네트웍 Boiler control method according to heating load
KR101017492B1 (en) * 2009-03-31 2011-02-25 린나이코리아 주식회사 Freezing prevention operation method of boiler for gas saving and device protection
KR101199687B1 (en) * 2009-10-01 2012-11-08 주식회사 경동나비엔 Operating method of compact cogeneration system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019219120A (en) * 2018-06-21 2019-12-26 株式会社ノーリツ Heat source machine for indoor heating

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KR101436842B1 (en) 2014-09-11
EP2940391B1 (en) 2018-05-23
KR20140085676A (en) 2014-07-08
CN104838209A (en) 2015-08-12
CN104838209B (en) 2017-09-19
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EP2940391A4 (en) 2016-07-27
RU2616580C2 (en) 2017-04-17

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