WO2009142377A1 - Multi-boiler and control method thereof for preventing back flow of exhaust gas - Google Patents

Multi-boiler and control method thereof for preventing back flow of exhaust gas Download PDF

Info

Publication number
WO2009142377A1
WO2009142377A1 PCT/KR2008/007707 KR2008007707W WO2009142377A1 WO 2009142377 A1 WO2009142377 A1 WO 2009142377A1 KR 2008007707 W KR2008007707 W KR 2008007707W WO 2009142377 A1 WO2009142377 A1 WO 2009142377A1
Authority
WO
WIPO (PCT)
Prior art keywords
boilers
wind pressure
fans
rpm
controllers
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.)
Ceased
Application number
PCT/KR2008/007707
Other languages
French (fr)
Inventor
Si-Hwan Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyungdong Network Co Ltd
Original Assignee
Kyungdong Network Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kyungdong Network Co Ltd filed Critical Kyungdong Network Co Ltd
Priority to CN200880129331.8A priority Critical patent/CN102037291B/en
Priority to JP2011510410A priority patent/JP5066627B2/en
Priority to EP08874410.7A priority patent/EP2297528A4/en
Priority to AU2008356712A priority patent/AU2008356712B2/en
Priority to US12/519,154 priority patent/US8235707B2/en
Priority to CA2724822A priority patent/CA2724822C/en
Publication of WO2009142377A1 publication Critical patent/WO2009142377A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • F24H9/2042—Preventing or detecting the return of combustion gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/002—Regulating air supply or draught using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/08—Regulating air supply or draught by power-assisted systems
    • F23N3/082—Regulating air supply or draught by power-assisted systems using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • 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
    • F24D12/00—Other central heating systems
    • F24D12/02—Other central heating systems having more than one heat source
    • 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
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/242—Pressure
    • 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
    • F24H15/345—Control of fans, e.g. on-off control
    • F24H15/35—Control of the speed of fans
    • 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
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/443—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using a central controller connected to several sub-controllers
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/20—Common flues for several combustion devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/28—Fail safe preventing flash-back or blow-back
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/02—Controlling two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/06—Space-heating and heating water
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler
    • F24D2200/043—More than one gas or oil fired boiler
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Definitions

  • the present invention relates to a multiboiler or a multi-water heater (hereafter,
  • combustion apparatuses such as a boiler or a water heater
  • a boiler or a water heater are designed to correspond to each desired capacity.
  • a boiler of 200,000 kcal/h is achieved by arranging five boilers in a line, each of which has a capacity of 40000 kcal/h.
  • the boilers or hot waters arranged as described above are called a multiboiler or a multi- water heater.
  • the multiboiler can be installed in a small space and maintenance and management are convenient, and even if one boiler breaks down, it is possible to significantly reduce inconvenience for use by controlling other boilers that do not break down. Further, the multiboiler is advantageous in terms of energy saving because it is possible to individually operate several boilers, depending on the desired capacity.
  • FIG. 1 is a schematic view of a multiboiler in the related art.
  • Boilers constituting a multiboiler are each provided with a wind pressure sensor 20 that measures the wind pressure of air flowing into a combustion chamber 10 and a controller 30 that controls the number of revolution of a fan that supplies the air into the combustion chamber according to the measured wind pressure.
  • the controller 30 performs a function of controlling various parts for operating the boiler.
  • the controllers 30 provided in the boilers are connected with each other by a communication line 50.
  • a damper 60 is generally disposed at the exhaust port 40 for each boiler such that gas is discharged only in one direction and cannot flow inside in the opposite direction.
  • FIGS. 2 and 3 are schematic views of examples of dampers disposed in the multiboiler in the related art.
  • a damper 61 shown in FIG. 2 is fixed by a hinge, such that the exhaust port 40 is opened toward the exhaust pipe by the pressure of the exhaust gas discharged out of the combustion chamber 10, but does not open to the combustion chamber 10.
  • the exhaust port 40 is opened and the exhaust gas can be discharged toward the exhaust pipe while the damper 62 is lifted by the pressure of the exhaust gas discharged out of the chamber 10, and the exhaust port 40 is closed after discharging is finished. Disclosure of Invention Technical Problem
  • an object of the present invention is to provide a multiboiler that can prevent backflow of exhaust gas, using a wind pressure sensor and a controller provided for each boiler, without using individual mechanical dampers.
  • FIG. 1 is a schematic view of a multiboiler in the related art
  • FIGS. 2 and 3 are schematic views illustrating the configuration of a damper disposed in the multiboiler in the related art
  • FIG. 4 is a schematic view of a multiboiler of the present invention.
  • FIG. 5 is a flowchart illustrating a control method of preventing backflow of exhaust gas of the present invention.
  • a control method of preventing backflow of exhaust gas of a multiboiler that is composed of a plurality of boilers connected in a line, each of which includes a wind pressure sensor measuring wind pressure of air flowing into a combustion chamber and a controller controlling the number of revolutions of a fan supplying air into the combustion chamber on the basis of the wind pressure measured by the wind pressure sensor, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, in which the present invention is characterized in that the control method includes: measuring wind pressure of air flowing into the combustion chambers using the wind pressure sensors in the controller of boilers that are in operation; and calculating the average wind pressure of the boilers that are in operation in response to information about the wind pressure measured by the controllers of the boilers that are in operation, using the master controller, determining the control amount of wind of the fans of boilers that are not in operation on the basis of the average wind pressure, and
  • the wind pressure according to the operation of the fans of the boilers that are not in operation is in a range of one-third to two-thirds of the measured wind pressure.
  • a control method of preventing backflow of air of a multiboiler that is composed of a plurality of boilers arranged in a line, each of which includes a sensor measuring the RPM of fans and a controller controlling RPM of fans on the basis of the RPM measured by sensors, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, in which the present invention is characterized in that the control method includes: measuring the RPM of the fans in the controllers of boilers that are in operation; and calculating the average RPM of the fans of the boilers that are in operation in response to information about the RPM of the fans measured by the controller of the boilers that are in operation, using the master controller, determining the RPM of the fans that are not in operation on the basis of the average RPM, and operating the fans of the boilers that are not in operation on the basis of the determined results.
  • the RPM of the fans of the boiler that are not in operation is in a range of one-third to two-thirds of the measured RPM.
  • a multiboiler that is composed of a plurality of boilers connected in a line, each of which includes a wind pressure sensor measuring wind pressure of air flowing into a combustion chamber and a controller controlling the number of revolutions of a fan supplying air into the combustion chamber on the basis of the wind pressure measured by the wind pressure sensor, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, in which the present invention is characterized in that the master controller calculates the average wind pressure of boilers that are in operation in response to information about the wind pressure measured by the controllers of the boilers that are in operation, determines the control amount of wind of the fans of boilers that are not in operation on the basis of the average wind pressure, and then operates the fans of the boilers that are not in operation on the basis of the determined results.
  • the wind pressure according to the operation of the fans of the boilers that are not in operation is in a range of one-third to two third of the wind pressure measured by the wind pressure sensors.
  • the wind pressure according to the operation of the fans of the boilers that are not in operation is one-half of the wind pressure measured by the wind pressure sensors.
  • a multiboiler that is composed of a plurality of boilers arranged in a line, each of which includes a sensor measuring the RPM of fans and a controller controlling RPM of fans on the basis of the RPM measured by sensors, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, in which the present invention is characterized in that the master controller calculates the average RPM of the fans of boilers that are in operation in response to information about the RPM measured by the controllers of the boilers that are in operation, determines the RPM of the fans of boilers that are not in operation on the basis of the average RPM, and then operates the fans of the boilers that are not in operation on the basis of the determined results.
  • the RPM of the fans of the boilers that are not in operation is in a range of one-third to two-thirds of the measured RPM.
  • FIG. 4 is a schematic view showing a multiboiler 100 according to an embodiment of the present invention, which is composed of, for example, five boilers or water heaters (hereafter, 'boiler) connected in a line.
  • 'boiler five boilers or water heaters
  • Boilers 101, 102, 103, 104, 105 constituting the multiboiler 100 respectively includes fans 111, 112, 113, 114, 115 that send air into combustion chambers, wind pressure sensors 121, 122, 123, 124, 125 that measure the pressure of air flowing into the combustion chambers, burners 131, 132, 133, 134, 135, and controllers 141, 142, 143, 144, 145 that control the numbers of revolution of the fans which supply air into the combustion chambers on the basis of the wind pressures measured by the wind pressure sensors.
  • the controllers 141, 142, 143, 144, 145 are connected with each other by a communication line 150 to communicate with each other.
  • one of the controllers provided in the boilers is set as a master controller and the others are correspondingly set as slave controllers.
  • the rightmost controller 145 is set as a master controller
  • the other four controllers 141, 142, 143, 144 are set as slave controllers.
  • the description of other components of the boilers is not provided.
  • a control method of preventing backflow according to an embodiment of the present invention can be used mainly for forced exhaust type boilers that forcibly discharge gas using fans 111, 112, 113, 114, 115, as shown in FIG. 4.
  • the control method according to an embodiment of the present invention is used for forced exhaust type boilers; however, since air supply lines of the forced exhaust type boilers are open to the atmosphere, new air can be easily supplied even if exhaust gas flows backward into the combustion chambers, such that an adverse effect due to the backflow is not large.
  • the control method of preventing backflow of exhaust gas of the multiboiler 100 is performed by measuring wind pressures of boilers, which are in operation, using the wind pressure sensors 121, 122, 123, 124, 125 disposed in the existing boilers 101, 102, 103, 104, 105 without specifically installing dampers, calculating an average pressure of the boilers, which are in operation, in the main controller in response to information of the wind pressures, calculating the control amount of wind of the fans to produce a wind pressure about one-third to two-thirds of the average wind pressure, and then giving an order of rotating the fans of the boilers that are not in operation. It is preferable to rotate the fans of the non-operating boilers to produce a wind pressure about one-half of the average pressure of the boilers that are in operation.
  • FIG. 5 is a flowchart illustrating the control method of preventing backflow of exhaust gas according to an embodiment of the present invention, in which it is assumed that the controller 145 of the rightmost boiler 105 is set as a master controller.
  • the master controller 145 determines whether some of the boilers 101, 102,
  • the master controller 145 receives information about the wind pressures measured by the wind pressure sensors 121, 122 of the boilers 101, 102 that are in operation, and calculates the average wind pressure of the boilers that are in operation by dividing the entire wind pressure by the number of the boilers 101, 102 that are in operation (S103).
  • the master controller 145 calculates the control amount of wind of the fans 113, 114,
  • the control amount of wind of the fans is calculated to produce a wind pressure between one-third to two- thirds of the average wind pressure of the boilers 101, 102 that are in operation, and the numbers of revolutions of the fans 113, 114, 115 are correspondingly calculated. It is preferable to calculate the control amount of wind of the fans 113, 114, 115 to produce one-half of the average wind pressure of the boilers 101, 102 that are in operation.
  • the control amount of wind of the fans 113, 114, 115 of the boilers 103, 104, 105 that are not in operation is calculated to be 35% of the maximum wind pressure.
  • the master controller 145 controls the amount of wind of the fans 113, 114, 115 that are not in operation, that is, the number of revolutions of the fans, on the basis of the calculated control amount of wind (S 105).
  • Another embodiment of the present invention is implemented by measuring RPM of fans, instead of the wind pressures of the fans of boilers that are in operation, using sensors, calculating the average RPM of the fans of the boilers that are in operation on the basis of the measured results, using a master controller, calculating control RPM of the fans at one-third to two-thirds, preferably one-half of the average RPM, and then giving an order of rotating the fans of the boilers that are not in operation on the basis of the calculated result.
  • the configuration of a multiboiler including the sensors measuring the RPM of the fans and the controller are the same as the configuration of the multiboiler shown in FIG.
  • a configuration for controlling the RPM using the controller and the sensors measuring the RPM are included, instead of the wind pressure sensors 121, 122, 123, 124, 125, in the multiboiler 100 shown in FIG. 4.
  • a control method according to the above configuration is the same as the flowchart of FIG. 5, but different in measurement of the RPM of the fans, instead of the wind pressures of the fans of the boilers that are in operation and control the RPM of the fans of the boilers that are not in operation.
  • the configuration of the sensor measuring the RPM of the fans and the control of the RPM by the controller are well known in the art, such that a detailed description is not provided.
  • the control method of preventing backflow of exhaust gas it is possible to effectively prevent exhaust gas of the boilers that are in operation from flowing backward into the combustion chambers of the boilers that are not in operation, by using the control method that uses the wind pressure sensors and controllers individually disposed in the boilers constituting the existing multiboiler, without installing specific dampers. Further, the control is possible by only measuring the RPM of the fans of the boilers that are in operation and controlling the RPM of the fans of the boilers that are not in operation, on the basis of the measured RPM. Therefore, cost for installing dampers is saved and there is no danger in which the dampers are not operated due to using over a long period of time.
  • the present invention makes it possible to prevent exhaust gas from flowing backward into combustion chambers that are not in operation, in a multiboiler.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

The present invention relates to a control method of preventing backflow of exhaust gas of a multiboiler that is composed of a plurality of boilers connected in a line, each of which includes a wind pressure sensor measuring wind pressure of air flowing into a combustion chamber and a controller controlling the number of revolutions of a fan supplying air into the combustion chamber on the basis of the wind pressure measured by the wind pressure sensor, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, and the control method includes: measuring wind pressures of air flowing into the combustion chambers using the wind pressure sensors in the controller of boilers that are in operation; and calculating the average wind pressure of the boilers that are in operation in response to information about the wind pressures measured by the controllers of the boilers that are in operation, using the master controller, determining the control amount of wind of the fans of boilers that are not in operation on the basis of the average wind pressure, and then operating the fan of the boilers that are not in operation on the basis of the determined results. According to the method, it is possible to provide a multiboiler or a multi-water heater that does not generate additional cost for installing the dampers are not needed and does not substantially breakdown due even though it is used for a long period of time, thereby saving cost for maintenance.

Description

Description
MULTI-BOILER AND CONTROL METHOD THEREOF FOR PREVENTING BACK FLOW OF EXHAUST GAS
Technical Field
[1] The present invention relates to a multiboiler or a multi-water heater (hereafter,
'multiboiler') for preventing exhaust gas backflow and a method of controlling the same, particularly a multiboiler that prevent exhaust gas backflow using a wind pressure sensor and a controller, which are provided for each boiler, without having a damper, and a method of controlling the multiboiler. Background Art
[2] In general, combustion apparatuses, such as a boiler or a water heater, are designed to correspond to each desired capacity. However, there is a method of arranging and using a plurality of low-capacity boilers or water heaters in a line to correspond to desired capacity. For example, a boiler of 200,000 kcal/h is achieved by arranging five boilers in a line, each of which has a capacity of 40000 kcal/h. The boilers or hot waters arranged as described above are called a multiboiler or a multi- water heater.
[3] The multiboiler can be installed in a small space and maintenance and management are convenient, and even if one boiler breaks down, it is possible to significantly reduce inconvenience for use by controlling other boilers that do not break down. Further, the multiboiler is advantageous in terms of energy saving because it is possible to individually operate several boilers, depending on the desired capacity.
[4] FIG. 1 is a schematic view of a multiboiler in the related art.
[5] Boilers constituting a multiboiler are each provided with a wind pressure sensor 20 that measures the wind pressure of air flowing into a combustion chamber 10 and a controller 30 that controls the number of revolution of a fan that supplies the air into the combustion chamber according to the measured wind pressure. In addition to this function, the controller 30 performs a function of controlling various parts for operating the boiler. The controllers 30 provided in the boilers are connected with each other by a communication line 50.
[6] In this multiboiler, mainly, only some of the boilers are operated to correspond to desired heating capacitance, in which exhaust gas of the boilers that are in operation frequently flows backward into the combustion chambers of other boilers that are not in operation. For example, when the leftmost boiler in the figure is in operation and the other boilers are not in operation, the exhaust gas discharged from the leftmost boiler may flow into the combustion chambers of the other boilers as shown by the arrows.
[7] When the non-operating boilers with the exhaust gas in the combustion chamber are operated, oxygen is not sufficiently supplied by the exhaust gas therein, which may cause non-ignition or explosive ignition. To prevent backflow of the exhaust gas, a damper 60 is generally disposed at the exhaust port 40 for each boiler such that gas is discharged only in one direction and cannot flow inside in the opposite direction.
[8] FIGS. 2 and 3 are schematic views of examples of dampers disposed in the multiboiler in the related art. A damper 61 shown in FIG. 2 is fixed by a hinge, such that the exhaust port 40 is opened toward the exhaust pipe by the pressure of the exhaust gas discharged out of the combustion chamber 10, but does not open to the combustion chamber 10. Further, as for a damper 62 shown in FIG. 3, the exhaust port 40 is opened and the exhaust gas can be discharged toward the exhaust pipe while the damper 62 is lifted by the pressure of the exhaust gas discharged out of the chamber 10, and the exhaust port 40 is closed after discharging is finished. Disclosure of Invention Technical Problem
[9] However, as the dampers 61, 62 are mechanically operated, the performance is deteriorated when they are use over a long period of time, and as a result, there was a problem in that they could not perform their functions as dampers. Accordingly, critical damage may be caused by backflow of exhaust gas when the dampers are not normally operated. Technical Solution
[10] Accordingly, designed in consideration of the above problems, an object of the present invention is to provide a multiboiler that can prevent backflow of exhaust gas, using a wind pressure sensor and a controller provided for each boiler, without using individual mechanical dampers.
Advantageous Effects
[11] According to the present invention, by rotating the fans of the non-operating boilers on the basis of the present wind pressure measured by wind pressure sensors of boilers that are in operation, without providing individual dampers for prevent backflow of exhaust gas, additional cost for installing the dampers are not needed and there is little possibility of breakdown due to using over a long period of time, thereby saving cost for maintenance. Brief Description of Drawings
[12] FIG. 1 is a schematic view of a multiboiler in the related art;
[13] FIGS. 2 and 3 are schematic views illustrating the configuration of a damper disposed in the multiboiler in the related art;
[14] FIG. 4 is a schematic view of a multiboiler of the present invention; and
[15] FIG. 5 is a flowchart illustrating a control method of preventing backflow of exhaust gas of the present invention.
Best Mode for Carrying out the Invention
[16] A control method of preventing backflow of exhaust gas of a multiboiler that is composed of a plurality of boilers connected in a line, each of which includes a wind pressure sensor measuring wind pressure of air flowing into a combustion chamber and a controller controlling the number of revolutions of a fan supplying air into the combustion chamber on the basis of the wind pressure measured by the wind pressure sensor, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, in which the present invention is characterized in that the control method includes: measuring wind pressure of air flowing into the combustion chambers using the wind pressure sensors in the controller of boilers that are in operation; and calculating the average wind pressure of the boilers that are in operation in response to information about the wind pressure measured by the controllers of the boilers that are in operation, using the master controller, determining the control amount of wind of the fans of boilers that are not in operation on the basis of the average wind pressure, and then operating the fan of the boilers that are not in operation on the basis of the determined results.
[17] Further, it is characterized in that the wind pressure according to the operation of the fans of the boilers that are not in operation is in a range of one-third to two-thirds of the measured wind pressure.
[18] Further, it is characterized in that the wind pressure according to the operation of the fans of the boilers that are not in operation is one-half of the measured wind pressure.
[19] A control method of preventing backflow of air of a multiboiler that is composed of a plurality of boilers arranged in a line, each of which includes a sensor measuring the RPM of fans and a controller controlling RPM of fans on the basis of the RPM measured by sensors, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, in which the present invention is characterized in that the control method includes: measuring the RPM of the fans in the controllers of boilers that are in operation; and calculating the average RPM of the fans of the boilers that are in operation in response to information about the RPM of the fans measured by the controller of the boilers that are in operation, using the master controller, determining the RPM of the fans that are not in operation on the basis of the average RPM, and operating the fans of the boilers that are not in operation on the basis of the determined results.
[20] Further, it is characterized in that the RPM of the fans of the boiler that are not in operation is in a range of one-third to two-thirds of the measured RPM.
[21] Further, it is characterized in that the RPM of the fans of the boilers that are not in operation is one-half of the measured RPM.
[22] A multiboiler that is composed of a plurality of boilers connected in a line, each of which includes a wind pressure sensor measuring wind pressure of air flowing into a combustion chamber and a controller controlling the number of revolutions of a fan supplying air into the combustion chamber on the basis of the wind pressure measured by the wind pressure sensor, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, in which the present invention is characterized in that the master controller calculates the average wind pressure of boilers that are in operation in response to information about the wind pressure measured by the controllers of the boilers that are in operation, determines the control amount of wind of the fans of boilers that are not in operation on the basis of the average wind pressure, and then operates the fans of the boilers that are not in operation on the basis of the determined results.
[23] Further, it is characterized in that the wind pressure according to the operation of the fans of the boilers that are not in operation is in a range of one-third to two third of the wind pressure measured by the wind pressure sensors.
[24] Further, it is characterized in that the wind pressure according to the operation of the fans of the boilers that are not in operation is one-half of the wind pressure measured by the wind pressure sensors.
[25] A multiboiler that is composed of a plurality of boilers arranged in a line, each of which includes a sensor measuring the RPM of fans and a controller controlling RPM of fans on the basis of the RPM measured by sensors, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, in which the present invention is characterized in that the master controller calculates the average RPM of the fans of boilers that are in operation in response to information about the RPM measured by the controllers of the boilers that are in operation, determines the RPM of the fans of boilers that are not in operation on the basis of the average RPM, and then operates the fans of the boilers that are not in operation on the basis of the determined results.
[26] Further, it is characterized in that the RPM of the fans of the boilers that are not in operation is in a range of one-third to two-thirds of the measured RPM.
[27] Further, it is characterized in that the RPM of the fans of the boilers that are not in operation is one-half of the measured RPM. Mode for the Invention
[28] The configuration and operation of preferred embodiments of the present invention are described hereafter in detail with reference to the accompanying drawings. Giving reference numerals to components in the drawings herein, it is noted that the same components are designated by substantially the same reference numerals, even though they are shown in different drawings.
[29] FIG. 4 is a schematic view showing a multiboiler 100 according to an embodiment of the present invention, which is composed of, for example, five boilers or water heaters (hereafter, 'boiler) connected in a line.
[30] Boilers 101, 102, 103, 104, 105 constituting the multiboiler 100 according to an embodiment of the present invention respectively includes fans 111, 112, 113, 114, 115 that send air into combustion chambers, wind pressure sensors 121, 122, 123, 124, 125 that measure the pressure of air flowing into the combustion chambers, burners 131, 132, 133, 134, 135, and controllers 141, 142, 143, 144, 145 that control the numbers of revolution of the fans which supply air into the combustion chambers on the basis of the wind pressures measured by the wind pressure sensors. The controllers 141, 142, 143, 144, 145 are connected with each other by a communication line 150 to communicate with each other. In general, one of the controllers provided in the boilers is set as a master controller and the others are correspondingly set as slave controllers. For example, assuming that the rightmost controller 145 is set as a master controller, the other four controllers 141, 142, 143, 144 are set as slave controllers. For simple description, the description of other components of the boilers is not provided.
[31] A control method of preventing backflow according to an embodiment of the present invention can be used mainly for forced exhaust type boilers that forcibly discharge gas using fans 111, 112, 113, 114, 115, as shown in FIG. 4. The control method according to an embodiment of the present invention is used for forced exhaust type boilers; however, since air supply lines of the forced exhaust type boilers are open to the atmosphere, new air can be easily supplied even if exhaust gas flows backward into the combustion chambers, such that an adverse effect due to the backflow is not large.
[32] The control method of preventing backflow of exhaust gas of the multiboiler 100 according to an embodiment of the present invention is performed by measuring wind pressures of boilers, which are in operation, using the wind pressure sensors 121, 122, 123, 124, 125 disposed in the existing boilers 101, 102, 103, 104, 105 without specifically installing dampers, calculating an average pressure of the boilers, which are in operation, in the main controller in response to information of the wind pressures, calculating the control amount of wind of the fans to produce a wind pressure about one-third to two-thirds of the average wind pressure, and then giving an order of rotating the fans of the boilers that are not in operation. It is preferable to rotate the fans of the non-operating boilers to produce a wind pressure about one-half of the average pressure of the boilers that are in operation.
[33] As described above, since the fans of the non-operating boilers rotate at a predetermined amount of wind, the exhaust gas from the boilers which are in operation does not flows backward, and even if the exhaust gas has flowed backward in the combustion chambers, it can be discharged outside by the fans of the non-operating boilers.
[34] FIG. 5 is a flowchart illustrating the control method of preventing backflow of exhaust gas according to an embodiment of the present invention, in which it is assumed that the controller 145 of the rightmost boiler 105 is set as a master controller.
[35] First, the master controller 145 determines whether some of the boilers 101, 102,
103, 104, 105 of the multiboiler 100 are in operation (SlOl).
[36] For example, when the two left boilers 101, 102 are in operation, the total number of boilers 101, 102 that are in operation is calculated (S 102). The number is two in this example.
[37] The master controller 145 receives information about the wind pressures measured by the wind pressure sensors 121, 122 of the boilers 101, 102 that are in operation, and calculates the average wind pressure of the boilers that are in operation by dividing the entire wind pressure by the number of the boilers 101, 102 that are in operation (S103).
[38] The master controller 145 calculates the control amount of wind of the fans 113, 114,
115 of the boilers 103, 104, 105 that are not in operation, on the basis of the average wind pressure of the boilers 101, 102 that are in operation (S104). The control amount of wind of the fans is calculated to produce a wind pressure between one-third to two- thirds of the average wind pressure of the boilers 101, 102 that are in operation, and the numbers of revolutions of the fans 113, 114, 115 are correspondingly calculated. It is preferable to calculate the control amount of wind of the fans 113, 114, 115 to produce one-half of the average wind pressure of the boilers 101, 102 that are in operation. For example, when the average wind pressure of the boilers 101, 102 that are in operation is 70% of the maximum wind pressure that the fans can produce, the control amount of wind of the fans 113, 114, 115 of the boilers 103, 104, 105 that are not in operation is calculated to be 35% of the maximum wind pressure.
[39] Next, the master controller 145 controls the amount of wind of the fans 113, 114, 115 that are not in operation, that is, the number of revolutions of the fans, on the basis of the calculated control amount of wind (S 105).
[40] Another embodiment of the present invention is implemented by measuring RPM of fans, instead of the wind pressures of the fans of boilers that are in operation, using sensors, calculating the average RPM of the fans of the boilers that are in operation on the basis of the measured results, using a master controller, calculating control RPM of the fans at one-third to two-thirds, preferably one-half of the average RPM, and then giving an order of rotating the fans of the boilers that are not in operation on the basis of the calculated result. The configuration of a multiboiler including the sensors measuring the RPM of the fans and the controller are the same as the configuration of the multiboiler shown in FIG. 4, except that a configuration for controlling the RPM using the controller and the sensors measuring the RPM are included, instead of the wind pressure sensors 121, 122, 123, 124, 125, in the multiboiler 100 shown in FIG. 4. Further, a control method according to the above configuration is the same as the flowchart of FIG. 5, but different in measurement of the RPM of the fans, instead of the wind pressures of the fans of the boilers that are in operation and control the RPM of the fans of the boilers that are not in operation. The configuration of the sensor measuring the RPM of the fans and the control of the RPM by the controller are well known in the art, such that a detailed description is not provided.
[41] According to the control method of preventing backflow of exhaust gas according to an embodiment of the present invention, it is possible to effectively prevent exhaust gas of the boilers that are in operation from flowing backward into the combustion chambers of the boilers that are not in operation, by using the control method that uses the wind pressure sensors and controllers individually disposed in the boilers constituting the existing multiboiler, without installing specific dampers. Further, the control is possible by only measuring the RPM of the fans of the boilers that are in operation and controlling the RPM of the fans of the boilers that are not in operation, on the basis of the measured RPM. Therefore, cost for installing dampers is saved and there is no danger in which the dampers are not operated due to using over a long period of time.
[42] Meanwhile, power consumption for rotating the fans of the boilers that are not in operation to prevent backflow of exhaust gas is not large, which has little influence on the cont for maintenance of all the boilers.
[43] The present invention is not limited to the above embodiments, and it is apparent to those skilled in the art that the present invention can be modified and changed in various ways, without departing from the technical sprit and scope of the present invention. Industrial Applicability
[44] As described above, the present invention makes it possible to prevent exhaust gas from flowing backward into combustion chambers that are not in operation, in a multiboiler.

Claims

Claims
[1] A control method of preventing backflow of exhaust gas of a multiboiler that is composed of a plurality of boilers connected in a line, each of which includes a wind pressure sensor measuring wind pressure of air flowing into a combustion chamber and a controller controlling the number of revolutions of a fan supplying air into the combustion chamber on the basis of the wind pressure measured by the wind pressure sensor, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, the control method comprising: measuring wind pressures of air flowing into the combustion chambers using the wind pressure sensors in the controller of boilers that are in operation; and calculating the average wind pressure of the boilers that are in operation in response to information about the wind pressures measured by the controllers of the boilers that are in operation, using the master controller, determining the control amount of wind of the fans of boilers that are not in operation on the basis of the average wind pressure, and then operating the fan of the boilers that are not in operation on the basis of the determined results.
[2] The control method of preventing backflow of air of a multiboiler according to claim 1, wherein the wind pressure according to the operation of the fans of the boilers that are not in operation is in a range of one-third to two-thirds of the measured wind pressure.
[3] The control method of preventing backflow of air of a multiboiler according to claim 2, wherein the wind pressure according to the operation of the fans of the boilers that are not in operation is one-half of the measured wind pressure.
[4] A control method of preventing backflow of air of a multiboiler that is composed of a plurality of boilers arranged in a line, each of which includes a sensor measuring the RPM of fans and a controller controlling RPM of fans on the basis of the RPM measured by sensors, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, the control method comprising: measuring the RPM of the fans in the controllers of boilers that are in operation; and calculating the average RPM of the fans of the boilers that are in operation in response to information about the RPM of the fans measured by the controller of the boilers that are in operation, using the master controller, determining the RPM of the fans that are not in operation on the basis of the average RPM, and operating the fans of the boilers that are not in operation on the basis of the determined results.
[5] The control method of preventing backflow of exhaust gas of a multiboiler according to claim 4, wherein the RPM of the fans of the boiler that are not in operation is in a range of one-third to two-thirds of the measured RPM.
[6] The control method of preventing backflow of exhaust gas of a multiboiler according claim 5, wherein the RPM of the fans of the boilers that are not in operation is one -half of the measured RPM.
[7] A multiboiler that is composed of a plurality of boilers connected in a line, each of which includes a wind pressure sensor measuring wind pressure of air flowing into a combustion chamber and a controller controlling the number of revolutions of a fan supplying air into the combustion chamber on the basis of the wind pressure measured by the wind pressure sensor, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, wherein the master controller calculates the average wind pressure of boilers that are in operation in response to information about the wind pressure measured by the controllers of the boilers that are in operation, determines the control amount of wind of the fans of boilers that are not in operation on the basis of the average wind pressure, and then operates the fans of the boilers that are not in operation on the basis of the determined results.
[8] The multiboiler according to claim 7, wherein the wind pressure according to the operation of the fans of the boilers that are not in operation is in a range of one- third to two third of the wind pressure measured by the wind pressure sensors.
[9] The multiboiler according to claim 8, wherein the wind pressure according to the operation of the fans of the boilers that are not in operation is one-half of the wind pressure measured by the wind pressure sensors.
[10] A multiboiler that is composed of a plurality of boilers arranged in a line, each of which includes a sensor measuring the RPM of fans and a controller controlling RPM of fans on the basis of the RPM measured by sensors, and in which any one of the controllers is set as a master controller and the other controllers are set as slave controllers and the master controller and the slave controllers are connected by a communication line to communicate with each other, wherein the master controller calculates the average RPM of the fans of boilers that are in operation in response to information about the RPM measured by the controllers of the boilers that are in operation, determines the RPM of the fans of boilers that are not in operation on the basis of the average RPM, and then operates the fans of the boilers that are not in operation on the basis of the determined results.
[11] The multiboiler according to claim 10, the RPM of the fans of the boilers that are not in operation is in a range of one-third to two-thirds of the measured RPM.
[12] The multiboiler according to claim 11, wherein the RPM of the fans of the boilers that are not in operation is one-half of the measured RPM.
PCT/KR2008/007707 2008-05-20 2008-12-26 Multi-boiler and control method thereof for preventing back flow of exhaust gas Ceased WO2009142377A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN200880129331.8A CN102037291B (en) 2008-05-20 2008-12-26 Multi-boiler for preventing backflow of exhaust gas and its control method
JP2011510410A JP5066627B2 (en) 2008-05-20 2008-12-26 Multi-boiler for preventing exhaust gas backflow and control method therefor
EP08874410.7A EP2297528A4 (en) 2008-05-20 2008-12-26 Multi-boiler and control method thereof for preventing back flow of exhaust gas
AU2008356712A AU2008356712B2 (en) 2008-05-20 2008-12-26 Multi-boiler and control method thereof for preventing back flow of exhaust gas
US12/519,154 US8235707B2 (en) 2008-05-20 2008-12-26 Multi-boiler and control method thereof for preventing back flow of exhaust gas
CA2724822A CA2724822C (en) 2008-05-20 2008-12-26 Multi-boiler and control method thereof for preventing back flow of exhaust gas

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2008-0046705 2008-05-20
KR1020080046705A KR101000724B1 (en) 2008-05-20 2008-05-20 Multi-boiler and its control method to prevent exhaust gas backflow

Publications (1)

Publication Number Publication Date
WO2009142377A1 true WO2009142377A1 (en) 2009-11-26

Family

ID=41340294

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/007707 Ceased WO2009142377A1 (en) 2008-05-20 2008-12-26 Multi-boiler and control method thereof for preventing back flow of exhaust gas

Country Status (9)

Country Link
US (1) US8235707B2 (en)
EP (1) EP2297528A4 (en)
JP (1) JP5066627B2 (en)
KR (1) KR101000724B1 (en)
CN (1) CN102037291B (en)
AU (1) AU2008356712B2 (en)
CA (1) CA2724822C (en)
RU (1) RU2454613C1 (en)
WO (1) WO2009142377A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101813376A (en) * 2010-03-30 2010-08-25 中山华帝燃具股份有限公司 Thermostatic gas water heater controller
EP2735807A3 (en) * 2012-11-19 2014-08-20 A.O. Smith Corporation Common venting system for water heaters and method of controlling the same
CN106123025A (en) * 2016-08-22 2016-11-16 上海汉人科技有限公司 Multichannel master slave mode combustion control system
EP3168549A1 (en) * 2015-11-16 2017-05-17 Viessmann Werke GmbH & Co. KG Heating assembly and method for operating a heating assembly
EP3719404A1 (en) * 2019-04-02 2020-10-07 Vaillant GmbH Method for operating a heating system with multiple components

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110203569A1 (en) * 2010-02-23 2011-08-25 John Robert Weimer Boiler system stabilizing damper and flue control method
JP5792455B2 (en) * 2010-12-02 2015-10-14 パーパス株式会社 Hot water supply system, hot water supply apparatus, and hot water supply control method
EP2623865B1 (en) 2012-02-03 2020-04-08 Honeywell Technologies Sarl Gas burner, method for operating the same and multi gas burner system
JP5746646B2 (en) * 2012-02-09 2015-07-08 リンナイ株式会社 Combined combustion device
JP5852458B2 (en) * 2012-02-09 2016-02-03 リンナイ株式会社 Combined combustion device
KR101404121B1 (en) * 2012-11-30 2014-06-10 주식회사 경동원 Method for outdoor temperature compensated control using the external network
JP6116418B2 (en) * 2013-07-12 2017-04-19 リンナイ株式会社 Combined combustion device
CA2883497C (en) * 2013-07-22 2017-03-07 Rinnai Corporation Combined combustion device
US20150096505A1 (en) * 2013-10-03 2015-04-09 Sridhar Deivasigamani On-demand tankless high volume capable water heating system
KR101579471B1 (en) * 2014-05-30 2015-12-23 린나이코리아 주식회사 Method and system of exhaust emission controlling of mult-water heater system
EP2985529B1 (en) * 2014-08-14 2020-01-01 Honeywell Technologies Sarl Combustion system and method for operating the same
KR101647128B1 (en) 2014-09-30 2016-08-09 린나이코리아 주식회사 Cascade system for controlling numbers of standby boiler or gas water heater and method of the system
US11619400B2 (en) * 2015-11-06 2023-04-04 Mestek, Inc. Networked boiler system and method
CN107062301A (en) * 2017-01-20 2017-08-18 钟祥市应强纸业有限公司 A kind of boiler blower system
JP6862920B2 (en) * 2017-03-01 2021-04-21 株式会社ノーリツ Hot water supply system
JP7229004B2 (en) * 2018-12-13 2023-02-27 大阪瓦斯株式会社 Heat source machine with fan
DE102020203383A1 (en) 2020-03-17 2021-09-23 Robert Bosch Gesellschaft mit beschränkter Haftung Method for monitoring a combustion device
CN111810978B (en) * 2020-07-20 2022-09-13 山东博然电力科技有限公司 Flue gas heat exchanger switching device of two boilers based on heat self-adjustment
CN113758019A (en) * 2021-09-06 2021-12-07 马鞍山亿科金属制品有限公司 Wind-resistant control method for gas water heater using constant-flow fan to exhaust air

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08121749A (en) * 1994-10-25 1996-05-17 Samuson:Kk Ventilating pressure controller for ventilating line for combined multiboilers
JPH1082519A (en) * 1996-09-06 1998-03-31 Kawaju Reinetsu Kogyo Kk Exhauster for boiler
JP2001132940A (en) * 1999-11-01 2001-05-18 Samson Co Ltd Exhaust gas backdraft preventer in multi-boiler system
JP2002013701A (en) * 2000-06-30 2002-01-18 Miura Co Ltd Method for controlling the number of boiler

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2084758C1 (en) * 1995-01-05 1997-07-20 Акционерное общество закрытого типа "Центральный научно-исследовательский и проектно-конструкторский институт морского флота" Method for control of operation of waste-heat boiler plant and system for its realization
JP4045983B2 (en) * 2003-03-10 2008-02-13 株式会社ノーリツ Linked water heater and its complementary operation control method
RU2246660C1 (en) * 2003-06-30 2005-02-20 Сташевский Иван Иванович Steam boiler
RU2258182C2 (en) * 2003-08-21 2005-08-10 Гаспарянц Рубен Саргисович Method of composite control of boilers in boiler room
JP2005127576A (en) * 2003-10-22 2005-05-19 Samson Co Ltd Combustion control unit of boiler
US7735459B2 (en) * 2006-06-23 2010-06-15 Westcast, Inc. Modular boiler control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08121749A (en) * 1994-10-25 1996-05-17 Samuson:Kk Ventilating pressure controller for ventilating line for combined multiboilers
JPH1082519A (en) * 1996-09-06 1998-03-31 Kawaju Reinetsu Kogyo Kk Exhauster for boiler
JP2001132940A (en) * 1999-11-01 2001-05-18 Samson Co Ltd Exhaust gas backdraft preventer in multi-boiler system
JP2002013701A (en) * 2000-06-30 2002-01-18 Miura Co Ltd Method for controlling the number of boiler

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2297528A4 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101813376A (en) * 2010-03-30 2010-08-25 中山华帝燃具股份有限公司 Thermostatic gas water heater controller
EP2735807A3 (en) * 2012-11-19 2014-08-20 A.O. Smith Corporation Common venting system for water heaters and method of controlling the same
US10584874B2 (en) 2012-11-19 2020-03-10 A. O. Smith Corporation Common venting system for water heaters and method of controlling the same
EP3168549A1 (en) * 2015-11-16 2017-05-17 Viessmann Werke GmbH & Co. KG Heating assembly and method for operating a heating assembly
CN106123025A (en) * 2016-08-22 2016-11-16 上海汉人科技有限公司 Multichannel master slave mode combustion control system
EP3719404A1 (en) * 2019-04-02 2020-10-07 Vaillant GmbH Method for operating a heating system with multiple components

Also Published As

Publication number Publication date
EP2297528A4 (en) 2014-06-04
EP2297528A1 (en) 2011-03-23
CA2724822A1 (en) 2009-11-26
CA2724822C (en) 2013-07-30
CN102037291A (en) 2011-04-27
KR101000724B1 (en) 2010-12-14
RU2454613C1 (en) 2012-06-27
CN102037291B (en) 2014-03-19
US8235707B2 (en) 2012-08-07
JP5066627B2 (en) 2012-11-07
AU2008356712B2 (en) 2013-01-24
KR20090120752A (en) 2009-11-25
AU2008356712A1 (en) 2009-11-26
US20100330512A1 (en) 2010-12-30
JP2011522203A (en) 2011-07-28

Similar Documents

Publication Publication Date Title
CA2724822C (en) Multi-boiler and control method thereof for preventing back flow of exhaust gas
WO2006095960A1 (en) System and control method of oil burner's suitable burning ratio using air pressure sensor
CN113932443A (en) Gas-fired hot water equipment and control method thereof, hot water system, and readable storage medium
KR20110021551A (en) Air pressure sensor abnormality detection method in air proportional boiler
KR101106934B1 (en) Correction method for judging the blockage of flue
KR100448521B1 (en) Apparatus for controlling hot water of boiler
KR20040106651A (en) Hot Water Supply System
KR20160132695A (en) Hot Water Heating Boiler with Improved Heat Flux
KR20040106653A (en) Hot Water Supply System
KR100294415B1 (en) Pump control method according to system condition of gas boiler
JP2004011937A (en) Combustion apparatus
JP2012083032A (en) Composition combustion apparatus
KR100536942B1 (en) Hot Water Supply Adjustment Apparatus of Boiler
KR100753596B1 (en) Heating control system and heating control method
KR20100091360A (en) Boiler with double temperature sensor and method of determining temperature sensor
KR100629780B1 (en) Error Compensation Method of Wind Pressure Sensor in Air Proportional Boiler
CN112577205B (en) Burner subsection switching control method and device of heat supply equipment and heat supply equipment
KR100704708B1 (en) Proportional gas boiler
KR100827967B1 (en) Air-fuel ratio control method of gas boiler
KR20040106652A (en) Hot Water Supply System
JP5922966B2 (en) Bathroom heating dryer
JPH04174234A (en) Displacement variable ventilation device
KR100193954B1 (en) Gas Residual Combustion Method of Gas Boiler
KR100254801B1 (en) How to control fan speed of gas boiler
KR20040082566A (en) Hot Water Supply Adjustment Apparatus of Water Heater

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200880129331.8

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 12519154

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08874410

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2008874410

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2008356712

Country of ref document: AU

Ref document number: 2724822

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2011510410

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2008356712

Country of ref document: AU

Date of ref document: 20081226

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2010151479

Country of ref document: RU