EP3832224B1 - Gasbeheiztes heizgerät mit detektion von schädlichem gas - Google Patents

Gasbeheiztes heizgerät mit detektion von schädlichem gas Download PDF

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Publication number
EP3832224B1
EP3832224B1 EP19213429.4A EP19213429A EP3832224B1 EP 3832224 B1 EP3832224 B1 EP 3832224B1 EP 19213429 A EP19213429 A EP 19213429A EP 3832224 B1 EP3832224 B1 EP 3832224B1
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EP
European Patent Office
Prior art keywords
gas
burner
harmful
fired heating
heating appliance
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Application number
EP19213429.4A
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English (en)
French (fr)
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EP3832224A1 (de
EP3832224C0 (de
Inventor
Mathieu Lionel
David Chauvin
Clementine Cazor
Herve Drillaud
Nicolas Raymond Debias
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Vaillant GmbH
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Vaillant GmbH
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Priority to EP19213429.4A priority Critical patent/EP3832224B1/de
Priority to ES19213429T priority patent/ES2960744T3/es
Publication of EP3832224A1 publication Critical patent/EP3832224A1/de
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Publication of EP3832224B1 publication Critical patent/EP3832224B1/de
Publication of EP3832224C0 publication Critical patent/EP3832224C0/de
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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
    • F24H9/2042—Preventing or detecting the return of combustion gases
    • F24H9/205—Closing the energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/107—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/124—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium 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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/112—Preventing or detecting blocked flues
    • F24H15/116—Disabling the heating means in response thereto
    • 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
    • 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
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating 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
    • F24H15/345—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
    • F24H15/30—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
    • 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
    • F24H15/395—Information to users, e.g. alarms
    • 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
    • F24H15/176—Improving or maintaining comfort of users
    • 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
    • F24H15/238—Flow rate
    • 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

Definitions

  • the present invention relates to a gas-fired heating appliance, and more particularly to a gas-fired heating appliance that is able to detect interior air quality thereof.
  • Gas-fired heating appliances generally include gas water heaters and gas boilers.
  • a typical gas boiler is operable to heat a transfer fluid, such as water, which is pumped around a boiler circuit.
  • the boiler circuit is typically connected, via suitable valves to space heating apparatuses such as radiators or under floor heating loop, so that the heat output from the boiler can be used for space heating purposes.
  • the gas boiler usually generates fumes containing harmful gases, like CO (Carbon monoxide), CO2 (Carbon dioxide), NOx (Nitric oxide) etc., which shall be discharged outdoors.
  • CO Carbon monoxide
  • CO2 Carbon dioxide
  • NOx Nitric oxide
  • the chimney can be a concentric duct composed of coaxial inner and outer tubes, usually the inner tube is provided to discharge the fumes and the outer tube is provided to introduce fresh air.
  • US patent publication US 2015/0096504 A1 discloses one example of such kind of boilers.
  • a circulating-type hot-water supply device 1 having an exhaust pipe 12 for ejecting the combustion exhaust gas of the burner 3 and an air supply pipe 13 covering the exhaust pipe 12 and connecting to a suction duct 15 which communicates with an air inlet of the combustion fan 14 for introducing external air for combustion.
  • German patent publication DE 30 08 399 A1 discloses a sensor 10 disposed in an exhaust gas backflow duct 9 and connected with a switching device 8 that is electrically connected to a solenoid valve 7. When there exists an exhaust gas backflow, such case can be detected by the sensor 10, and then the switching device 8 is activated to actuate the solenoid valve 7 to interrupt the gas burner 2.
  • US5,797,358 discloses a water heater equipped with a carbon monoxide sensor positioned proximate to a draft hood to detect the presence of an unacceptable level of carbon monoxide for indicative of a blocked vent pipe and also send a signal to a microprocessor which will prevent or discontinue the operation of the burners.
  • CN 104110869 A discloses a gas water heater having a gas sensor for detection of the gas concentration, and a controller for shutting off a gas valve when the gas concentration detected by the gas sensor exceeds a predetermined threshold.
  • DE 298 02 545 U1 discloses a heating appliance having an exhaust-gas ducting is provided with a flow safe-guard 24 which has an orifice 32 opening into the installation space of the heating appliance for operating the heating appliance as a function of the room air and also a first connection piece 26 for an exhaust-gas pipe 18 and a second connection piece 30 for the external exhaust-gas ducting.
  • the two connection pieces 26, 30 being arranged so as to be offset horizontally to one another, so that the overall height of the heating device is not significantly increased.
  • An exhaust-gas sensor 34 for the detection of building-up exhaust gas is provided laterally at the first connection piece 26 in the immediate vicinity of the orifice 32. If there exist blockages in the chimney, the exhaust gases pass through the opening 32 into the room. The exhaust gases are detected by the exhaust-gas sensor 34 and the heater is automatically restarted after a pause of about 20 minutes.
  • a gas-fired heating appliance adapted for being connected to a common chimney via flue pipes to discharge fumes and introduce outside air.
  • the gas-fired heating appliance includes a housing, a burner, a gas valve, a fan, a harmful gas sensor, and a controller.
  • the housing defines a first port and a second port surrounding the first port, wherein one of the first and the second ports is provided to discharge fumes and the other of the first and the second ports is provided to introduce outside air.
  • the burner is disposed in the housing for combustion of a mixture of introduced outside air and fuel gas to generate fumes.
  • the gas valve is associated with the burner for regulating supply of fuel gas to the burner.
  • the fan is disposed in the housing for driving the introduced outside air supplied to the burner and urging the fumes to be discharge outside through the flue pipes and the common chimney.
  • the harmful gas sensor is disposed in the housing for detecting a concentration of the harmful gases within air inside of the housing.
  • the harmful gas sensor can be used to detect one or several or all of CO, CO2, NOx and other harmful gases normally contained in fumes.
  • the controller is electrically connected with the burner, the gas valve, the fan, and the harmful gas sensor for controlling the fan and/or the burner and/or the gas valve based on the detection of the harmful gas sensor.
  • the controller is configured to start a standby operation when an excess of harmful gases is detected while the appliance is in a standby mode, and the standby operation includes activating the fan to run to evacuate fumes in the air inside of the housing. In this way, when there is fumes recirculation inside of the housing, it will be quickly detected and appreciates actions can be taken against the fumes recirculation.
  • the excess of harmful gases is detected when the harmful gas sensor detects that the concentration of the harmful gases is larger than or equals to a first threshold.
  • the standby operation further includes increasing the fan speed step by step, like every two minutes.
  • the standby operation includes stopping the fan running if the harmful gas sensor detects that the concentration of the harmful gases reduces to a second threshold within a first time duration after the excess of harmful gases being detected.
  • the standby operation includes displaying a fault code if the harmful gas sensor detects that the concentration of the harmful gases does not reduce to a second threshold within a first time duration after the excess of harmful gases being detected, so that the user or the installer can be notified there is bad air quality inside of the housing.
  • the standby operation further includes keeping the fan running to continue evacuating fumes until the user or the installer stops it, and disabling the combustion of the burner to avoid danger or damages.
  • the second threshold equals to or is lower than the first threshold.
  • the controller is configured to stop the combustion of the burner and then enter the standby operation when the appliance operates in a domestic hot water mode for a second time duration after the excess of harmful gases being detected.
  • the controller is configured to stop the combustion of the burner and then enter the standby operation when the excess of harmful gases is detected while the appliance operates in a space heating mode.
  • the appliance further includes a counter that is able to count once when the excess of harmful gases is detected and the burner is in operation, and wherein the controller is configured to display a fault code when the accumulated number of times reaches a predetermined value within a certain time period.
  • the controller is further configured to keep the fan running and disable the combustion of the burner.
  • the harmful gas sensor is disposed adjacent to the port for introducing outside air. Since the sensor is positioned at entrance of the fresh air, the fumes recirculation from other boilers can be quickly detected when the appliance is in a standby mode.
  • the appliance further includes an air duct disposed in the housing for guiding the outside air to the burner, and wherein the harmful gas sensor is disposed at an inlet of the air duct, which is better to detect fumes recirculation when the appliance is running because the fan is sucking the fresh air and the fumes recirculation from other boilers or this boiler's own thermal module can be detected quickly.
  • the gas-fired heating appliance of the present invention is suitable for home applications and could be fired with combustible gas, such as natural gas, city gas, liquefied petroleum gas, methane, etc.
  • Gas-fired heating appliances can be used to heat domestic water for hot water demands of users, such as gas water heaters, or gas boilers that can provide both domestic hot water and needs of space heating.
  • a gas boiler and a gas water heater will be respectively exemplified to explain the present invention in details in the following embodiments.
  • a gas-fired heating appliance and chimney system 100 includes a gas boiler 1, a common chimney 9, and flue pipes 8 connected between the gas boiler 1 and the common chimney 9.
  • the common chimney 9 can be connected by a number of gas-fired heating appliances in multi-family house on multiple flue configurations, for example, the chimney may be out of the building or in the building.
  • Each of the flue pipes 8 and the common chimney 9 may take forms of a concentric duct composed of coaxial inner tube 81, 91 and outer tube 82, 92, wherein, one of the inner and the outer tubes is provided to discharge fumes and the other of the inner and the outer tubes is provided to introduce outside fresh air.
  • the inner tube 81, 91 is to discharge the fumes and the outer tube 82, 92 is to introduce fresh air.
  • the gas boiler is preferably a condensing boiler.
  • the boiler 1 includes a housing 11, and a thermal module 121, a gas valve 122, a fan 123 all contained in the housing 11.
  • the housing is usually sealed in appropriate means to prevent gas leakage.
  • the housing 11 defines a first port 181 communicating with the inner tubes 81, 91, and a second port 182 surrounding the first port and communicating with the outer tubes 82, 92.
  • the thermal module 121 typically includes a cylindrical burner combined with ignition and monitoring electrodes for combustion of a mixture of fresh air and fuel gas to generate fumes, and an integral condensation heat exchanger that consists of a number of stacked coils surrounding the cylindrical burner.
  • the gas valve 122 is connected with a fuel gas supplying line 1221 and operable to regulate supply of the fuel gas to the burner.
  • the fan 123 is provided to route the fresh air mainly containing oxygen for combustion preferably through an air duct 13 to the burner, and to urge the fumes to be released into the flue pipes via a flue duct 281.
  • a plate heat exchanger 14 is disposed in the housing 11.
  • a domestic water path 151 is provided to introduce cold water that can passes through the plate heat exchanger 14 to obtain heat, and output the heated water for sanitary usage, such as showering or bathing.
  • a transfer fluid path 152 is connected with the integral condensation heat exchanger for obtaining heat, and external space heating apparatuses for radiating heat into interior of buildings.
  • the transfer fluid path 152 can also be switched to pass through the plate heat exchanger 14, however, the two paths 151, 152 are physically isolated to avoid mixing the domestic water and the transfer fluid, but allowing heat interchanging therebetween.
  • a flow sensor 153 is disposed in and preferably at the inlet of the domestic water path 151 and able to generate a signal when there is water flow passing through the path 151 for domestic hot water demand.
  • a harmful gas sensor is provided inside of the housing 11 at a proper position to detect concentration of the harmful gases with the air inside of the housing.
  • the harmful gases can be one or all kinds of harmful gases contained in the fumes, such as CO, CO2, NOx, etc.
  • the harmful gas sensor can be a CO2 sensor such as TELAIRE ® T6713 series working by NDIR (Non-Dispersive Infrared) technology.
  • the NDIR technology uses a broadband infrared (IR) emitter, which covers all of the wavelengths of interest for a given set of gases to be measured.
  • IR infrared
  • Optical band pass filter attached to the gas sensor allow that portion of IR wavelengths at which a specific gas, like CO2 absorbs IR energy, then the gas sensor produces a signal that is proportional to the amount of IR energy absorbed by the gas of interest.
  • the harmful gas sensor 16 is preferably provided at an inlet of the air duct 13, which is better to detect fumes recirculation when the boiler is running because the fan 123 is sucking the fresh air and the fumes recirculation from other boilers or this boiler's own thermal module can be detected quickly.
  • a controller 17 is also provided in the housing 11 and electrically connected with the burner, the gas valve 122, the fan 123, the flow sensor 153, and the harmful gas sensor 16.
  • the controller 17 is configured to control various operations of the gas boilers, which will be described in details with reference to the flowchart shown in Fig. 3 .
  • the controller 17 can be a logic control circuit formed by a number of electronic components connected in accordance with certain wiring patterns; or it may also be a microcontroller (MCU) storing program instructions; or it may be integrated chips with specific use, such as Field-Programmable Gate Arrays (FPGAs).
  • MCU microcontroller
  • FPGAs Field-Programmable Gate Arrays
  • Fig. 2 shows a gas-fired heating appliance and chimney system 200 in a second embodiment of present invention, wherein, a gas water heater 2 is connected to a common chimney 9 via flue pipes 8.
  • the gas water heater 2 includes an air tight housing 21 having a first port 281 and a second port 29, a burner 221 combined with ignition and monitoring electrodes 2211, 2222, a finned tube heat exchanger 222 connected with a cold water incoming line 251 and a hot water output line 252, a gas valve 23 connected in a fuel gas supplying line 231, a fan 24 for driving introduced outside air and urging fumes discharged into the flue pipes 8 via a gas hood 28.
  • a harmful gas sensor that can also be a CO2 sensor provided adjacent to the second port 29 where outside fresh air is introduced. Since the sensor is positioned at entrance of the fresh air, the fumes recirculation from other boilers can be quickly detected when the gas water is in a standby mode.
  • a controller 27 is also provided in the housing 21 and electrically connected with the burner 221, the gas valve 23, the fan 24, the flow sensor 253, and the harmful gas sensor 26.
  • the controller 17 monitors CO2 concentration of the air inside of the housing 11 via the CO2 sensor 16 in real time or periodically (step 411). If the concentration of CO2 is larger than or equals to a first threshold, such as 9000ppm (step 411), which means there is an excess of CO2, the controller 17 will further check if the burner is in operation through the monitoring electrode (step 413). If the burner is not in operation, which means the gas boiler is in a standby mode, the controller 17 then starts a standby operation.
  • a first threshold such as 9000ppm
  • the controller 17 first activates the fan 123 to run to evacuate fumes in the fresh air so that the quality of the fresh air becomes good for ignition (Step 421).
  • the fan 123 runs at a lowest speed at first, then increases the speed step by step. It is well known to the skilled person that the fan speed can be regulated by adjusting the PWM signal to the current of the fan.
  • the controller 17 continues to check if the CO2 concentration reduces to a second threshold within a first time duration after the excess of CO2 being detected (Step 422). The second threshold equals to or is lower than the first threshold.
  • the controller 17 stops the fan running (Step 423) and then continues to monitor the CO2 concentration.
  • the controller can stop the fan after a delay.
  • the controller 17 displays a fault code on a display panel (not shown) of the gas boiler to remind the user so that the user can inspect the boiler and take appropriate actions against fumes, preferably, the controller 17 also disables the combustion of the burner, such as cutting off the gas valve 122 to avoid danger and damages, meanwhile keeps the fan running to evacuate fumes (Step 424).
  • Step 415 if the burner is in operation, a counter for fumes recirculation will count once (Step 414), then the controller 17 further checks if the accumulated number of times reaches a predetermined value within a certain time period (Step 415).
  • the predetermined value is five, and the certain time period is 24-hour. Therefore, if the accumulated number of times of the counter reaches five within past 24 hours, which means there is a high frequency of detection of excess of CO2, then the controller 17 displays a fault code, and preferably, disables the combustion of the burner and keeps the fan running to evacuate fumes (Step 424); otherwise, the controller 17 further checks if there is a demand of domestic hot water (Step 416).
  • the controller 17 can detect domestic hot water demand via the flow sensor 153, that is, if there is a water flow in the domestic water path 151, the flow sensor will send a corresponding signal to the controller 17, then the controller 17 will wait for a second time duration after the excess of CO2 being detected, like three hours to ensure the comfort of users using the hot water (Step 417). If there is no domestic hot water demand, namely the boiler is in operation in a space heating mode, or the second time duration lapses after the excess of CO2 being detected in the domestic hot water mode, the controller 17 stops the combustion of the burner, such as by cutting off the gas valve 122 (Step 418) and then enters the standby operation. It is obvious to the skilled person that, for a gas water heater, the step 416 can omitted because if the burner is in operation, the flow sensor shall detect a water flow at the same time, so there is no need to detect "domestic hot water demand".
  • the harmful gas detection can also be used by an installer.
  • the controller On installation, the controller is operable to conduct the detection of harmful gases on site, and if there is an excess of harmful gases being detected, he or she can inspect and take actions against fumes recirculation right now.
  • the fumes usually contain CO, CO2, NOx and other harmful gases
  • an excess of CO2 also reflects an excess of CO or NOx, therefore, the excess of CO and NOx can also be limited by only detection of CO2 and thus the excess limitation.
  • the risk of condensation in air side caused by potential fumes recirculation can be reduced because the fumes recirculation can be detected quickly and the fan will be started to evacuate the fumes.

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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)
  • Fluid Mechanics (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Claims (13)

  1. Gasbefeuertes Heizgerät (1, 2), das dazu angepasst ist, über Rauchrohre (8) mit einem gemeinsamen Kamin (9) verbunden zu sein, um Rauchgase abzuführen und Außenluft einzuführen, umfassend:
    ein Gehäuse (11, 21), das eine erste Öffnung (181, 281) und eine die erste Öffnung umgebende zweite Öffnung (19, 29) definiert, wobei eine der ersten und der zweiten Öffnung zum Abführen von Rauchgasen bereitgestellt ist und die andere der ersten und der zweiten Öffnung zum Einführen von Außenluft bereitgestellt ist;
    einen im Gehäuse angeordneten Brenner zur Verbrennung eines Gemisches aus eingeführter Außenluft und Brennstoffgas, um Rauchgase zu erzeugen;
    ein dem Brenner zugeordnetes Gasventil zum Regulieren der Zufuhr von Brennstoffgas zum Brenner;
    einen im Gehäuse angeordneten Lüfter zum Antreiben der eingeführten Außenluft, die dem Brenner zugeführt wird, und Drängen der Rauchgase, die über die Rauchrohre und den gemeinsamen Kamin nach außen abgeführt werden sollen;
    eine Steuereinheit, die elektrisch mit dem Brenner, dem Gasventil und dem Lüfter verbunden ist; dadurch gekennzeichnet, dass sie weiter umfasst:
    einen Schadgassensor, der in dem Gehäuse angeordnet ist, um eine Konzentration der Schadgase, einschließlich mindestens eines von CO, CO2, NOx, in der Luft im Inneren des Gehäuses zu erkennen; und dass die Steuereinheit elektrisch mit dem Brenner, dem Gasventil, dem Lüfter und dem Schadgassensor verbunden ist, um den Lüfter und/oder den Brenner und/oder das Gasventil basierend auf der Erkennung des Schadgassensors zu steuern; wobei die Steuereinheit so konfiguriert ist, dass sie einen Standby-Betrieb startet, wenn ein Überschuss an Schadgasen erkannt wird, während sich das Gerät in einem Standby-Modus befindet, und der Standby-Betrieb das Aktivieren des in Betrieb zu nehmenden Lüfters beinhaltet.
  2. Gasbefeuertes Heizgerät nach Anspruch 1, wobei der Überschuss an Schadgasen erkannt wird, wenn der Schadgassensor erkennt, dass die Konzentration der Schadgase größer als oder gleich einer ersten Schwelle ist.
  3. Gasbefeuertes Heizgerät nach Anspruch 1, wobei der Standby-Betrieb weiter die schrittweise Erhöhung der Lüfterdrehzahl beinhaltet.
  4. Gasbefeuertes Heizgerät nach Anspruch 1 oder 3, wobei der Standby-Betrieb weiter das Anhalten des in Betrieb genommenen Lüfters beinhaltet, wenn der Schadgassensor erkennt, dass die Konzentration der Schadgase innerhalb einer ersten Zeitdauer nach dem Erkennen des Überschusses an Schadgasen auf eine zweite Schwelle sinkt.
  5. Gasbefeuertes Heizgerät nach Anspruch 1 oder 3, wobei der Standby-Betrieb weiter das Anzeigen eines Fehlercodes beinhaltet, wenn der Schadgassensor erkennt, dass die Konzentration der Schadgase nicht innerhalb einer ersten Zeitdauer nach dem Erkennen des Überschusses an Schadgasen auf eine zweite Schwelle sinkt.
  6. Gasbefeuertes Heizgerät nach Anspruch 5, wobei der Standby-Betrieb weiter das In-Betrieb-Halten des Lüfters und das Abschalten der Verbrennung des Brenners beinhaltet.
  7. Gasbefeuertes Heizgerät nach Anspruch 6 oder 5, wobei die zweite Schwelle gleich der ersten Schwelle oder niedriger als diese ist.
  8. Gasbefeuertes Heizgerät nach einem der Ansprüche 2-7, wobei die Steuereinheit so konfiguriert ist, dass sie die Verbrennung des Brenners anhält und dann in den Standby-Betrieb eintritt, wenn das Gerät für eine zweite Zeitdauer nach dem Erkennen eines Überschusses an Schadgasen in einem Gebrauchswarmwasser-Modus arbeitet.
  9. Gasbefeuertes Heizgerät nach einem der Ansprüche 2-7, wobei die Steuereinheit so konfiguriert ist, dass sie die Verbrennung des Brenners anhält und dann in den Standby-Betrieb eintritt, wenn der Überschuss an Schadgasen erkannt wird, während das Gerät in einem Raumheizmodus arbeitet.
  10. Gasbefeuertes Heizgerät nach Anspruch 1, weiter umfassend einen Zähler, der in der Lage ist, einmal zu zählen, wenn der Überschuss an Schadgasen erkannt wird und der Brenner in Betrieb ist, und wobei die Steuereinheit so konfiguriert ist, dass sie einen Fehlercode anzeigt, wenn die akkumulierte Anzahl von Malen einen vorbestimmten Wert innerhalb einer bestimmten Zeitspanne erreicht.
  11. Gasbefeuertes Heizgerät nach Anspruch 10, wobei die Steuereinheit weiter so konfiguriert ist, dass sie den Lüfter in Betrieb hält und die Verbrennung des Brenners abschaltet.
  12. Gasbefeuertes Heizgerät (2) nach Anspruch 1, wobei der Schadgassensor (26) angrenzend an die Öffnung zum Einführen von Außenluft angeordnet ist.
  13. Gasbefeuertes Heizgerät (1) nach Anspruch 1, weiter umfassend einen Luftkanal (13), der im Gehäuse angeordnet ist, um die Außenluft zum Brenner zu leiten, wobei der Schadgassensor (16) an einem Einlass des Luftkanals angeordnet ist.
EP19213429.4A 2019-12-04 2019-12-04 Gasbeheiztes heizgerät mit detektion von schädlichem gas Active EP3832224B1 (de)

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EP19213429.4A EP3832224B1 (de) 2019-12-04 2019-12-04 Gasbeheiztes heizgerät mit detektion von schädlichem gas
ES19213429T ES2960744T3 (es) 2019-12-04 2019-12-04 Artefacto de calefacción a gas con detector de gases nocivos

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EP19213429.4A EP3832224B1 (de) 2019-12-04 2019-12-04 Gasbeheiztes heizgerät mit detektion von schädlichem gas

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EP4102141A1 (de) * 2021-06-11 2022-12-14 BDR Thermea Group B.V. Sicherheitsmechanismus

Citations (1)

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Publication number Priority date Publication date Assignee Title
USRE37745E1 (en) * 1996-07-08 2002-06-18 Aos Holding Company Control system for a water heater

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Publication number Priority date Publication date Assignee Title
DE3008399A1 (de) * 1980-03-05 1981-09-17 Küppersbusch AG, 4650 Gelsenkirchen Gas-raumheizungsgeraet
US5797358A (en) * 1996-07-08 1998-08-25 Aos Holding Company Control system for a water heater
DE29802545U1 (de) * 1998-02-14 1999-06-17 Robert Bosch Gmbh, 70469 Stuttgart Abgasführung für ein Heizgerät
CN104110869A (zh) * 2013-04-22 2014-10-22 青岛经济技术开发区海尔热水器有限公司 一种具有ch4、co、着火监测装置及报警功能的燃气热水器
US9228759B2 (en) * 2013-10-07 2016-01-05 Rinnai Corporation Circulating-type hot-water supply device

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Publication number Priority date Publication date Assignee Title
USRE37745E1 (en) * 1996-07-08 2002-06-18 Aos Holding Company Control system for a water heater

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EP3832224A1 (de) 2021-06-09
EP3832224C0 (de) 2023-08-02

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