EP3312523A1 - Gaswassererhitzer und sicherheitssteuerungsverfahren und -system dafür - Google Patents

Gaswassererhitzer und sicherheitssteuerungsverfahren und -system dafür Download PDF

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Publication number
EP3312523A1
EP3312523A1 EP16869368.7A EP16869368A EP3312523A1 EP 3312523 A1 EP3312523 A1 EP 3312523A1 EP 16869368 A EP16869368 A EP 16869368A EP 3312523 A1 EP3312523 A1 EP 3312523A1
Authority
EP
European Patent Office
Prior art keywords
wind pressure
set value
output power
water heater
exhaust fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16869368.7A
Other languages
English (en)
French (fr)
Other versions
EP3312523A4 (de
EP3312523B1 (de
Inventor
Chengzhi XUE
Xianfeng Dai
Guorong LIANG
Xiaoe Tang
Xiaolin Qian
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.)
Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Original Assignee
Wuhu Midea Kitchen and Bath Appliances Manufacturing 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 Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd filed Critical Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Publication of EP3312523A1 publication Critical patent/EP3312523A1/de
Publication of EP3312523A4 publication Critical patent/EP3312523A4/de
Application granted granted Critical
Publication of EP3312523B1 publication Critical patent/EP3312523B1/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
    • 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
    • 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
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • 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
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/215—Temperature of the water before heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/281—Input from user
    • 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

Definitions

  • the present disclosure relates to the water heater technology field, and more particular to, a gas water heater, a safety control method for a gas water heater, and a safety control system for a gas water heater.
  • gas water heaters on the market typically include: D type (natural exhaust type) gas water heaters, Q type (forced exhaust type) gas water heaters, P type (natural exhaust and air supply type) gas water heaters, G type (forced exhaust and air supply type) gas water heaters and W type (outside set-up type) gas water heaters and so on.
  • D type natural exhaust type
  • Q type forced exhaust type
  • P type natural exhaust and air supply type
  • G type forced exhaust and air supply type gas water heaters
  • W type outside set-up type gas water heaters and so on.
  • Q type and G type gas water heaters are provided with exhaust fans directly, so as to forcedly exhaust waste gas generated when burning gas, such that the residual gas explosion or the like may be avoided.
  • the Q type gas water heater mostly adopts a wind pressure detecting unit to detect the wind pressure at an air outlet and controls the exhaust fan and an igniter unit according to the detected wind pressure, so as to ensure that the gas water heater may work normally.
  • the combustion operation of the gas water heater in the case of the wind flow backward may be avoided by adopting the wind pressure detecting unit, the device cost is high, and the operation of the gas water heater may be interrupted due to the slight wind pressure, resulting in that the user is unable to use the gas water heater normally.
  • the present disclosure aims to solve at least one of the above technical problems in the related art to at least some extent.
  • a first objective of the present disclosure aims to provide a safety control system for a gas water heater.
  • the safety control system may ensure that the gas water heater can have a good combustion condition and operate safely and reliably. Also, the response speed of the system is fast and accurate air volume may be provided, such that the control accuracy is improved.
  • a second objective of the present disclosure aims to provide a gas water heater.
  • a third objective of the present disclosure aims to provide a safety control method for a gas water heater.
  • a safety control system for a gas water heater including: an exhaust fan, configured to exhaust waste gas generated when the gas water heater burns gas; a rotational speed detecting unit, configured to detect a rotational speed of the exhaust fan; a power obtaining unit, configured to obtain a set value for output power of the exhaust fan; and an exhaust control unit, connected to the exhaust fan, the rotational speed detecting unit and the power obtaining unit respectively, and configured to determine a wind pressure situation at an air outlet of the exhaust fan according to the rotational speed and the set value for the output power, and to adjust the set value for the output power according to the wind pressure situation.
  • the rotational speed detecting unit obtains the rotational speed of the exhaust fan
  • the power obtaining unit obtains the set value for the output power of the exhaust fan
  • the exhaust control unit determines the wind pressure situation at the air outlet of the exhaust fan according to the rotational speed and the set value for the output power and adjusts the set value for the output power according to the wind pressure situation, such that the adjustment of rotational speed of the exhaust fan may be realized, and it is guaranteed that a good combustion condition may be achieved after mixing the introduced gas and air during the operation of the gas water heater, thus ensuring that the gas water heater can operate safely and reliably.
  • the direct adjustment of the set value for the output power is an active control, which not only has a fast response speed and but also provides more accurate air volume when compared to the passive control on the rotational speed of the exhaust fan, such that the control accuracy is improved and the whole system cost is low.
  • the exhaust control unit is configured to determine a wind pressure situation at an air outlet of the exhaust fan according to the rotational speed and the set value for the output power and to adjust the set value for the output power according to the wind pressure situation by performing following acts: controlling the set value for the output power to be reduced by a first predetermined value when the exhaust control unit determines that the wind pressure situation is a low wind pressure situation; controlling the set value for the output power to keep unchanged when the exhaust control unit determines that the wind pressure situation is a medium wind pressure situation; and controlling the set value for the output power to be increased by a second predetermined value when the exhaust control unit determines that the wind pressure situation is a high wind pressure situation.
  • the above safety control system further includes a system control unit configured to perform a mutual communication with the exhaust control unit, in which the exhaust control unit is configured to send a shut-off signal to the system control unit such that the system control unit controls the gas water heater to shut off according to the shut-off signal, when the exhaust control unit determines that the wind pressure situation is an extreme high wind pressure situation or the rotational speed is higher than a rotational speed threshold.
  • the above safety control system further includes: a water supply unit, connected to the system control unit; and a temperature obtaining unit, connected with the system control unit, configured to obtain a set temperature for output water of the gas water heater and a cold water temperature of the gas water heater, in which the system control unit is configured to calculate a total heat required by the gas water heater according to a water supply quantity of the water supply unit, the set temperature for the output water and the cold water temperature, and to obtain a current control instruction and an initial set value for the output power according to the total heat.
  • the above safety control system further includes a gas unit, connected to the system control unit and provided with a proportional valve, in which the system control unit is configured to control the gas unit by controlling the proportional valve according to the current control instruction.
  • the gas water heater is a forced exhaust type gas water heater.
  • embodiments of a second aspect of the present disclosure provide a gas water heater, including the above safety control system.
  • the gas water heater may determine the wind pressure situation at the air outlet of the exhaust fan according to the rotational speed and the set value for the output power and adjust the set value for the output power according to the wind pressure situation, such that the adjustment of rotational speed of the exhaust fan may be realized, and it is guaranteed that a good combustion condition may be achieved after mixing the introduced gas and air during the operation of the gas water heater, thus ensuring the safe and reliable operation of the gas water heater.
  • the direct adjustment of the set value for the output power is an active control, which not only has a fast response speed but also provides more accurate air volume when compared to the passive control on the rotational speed of the exhaust fan, such that the control accuracy is improved.
  • embodiments of a third aspect of the present disclosure provide a safety control method for a gas water heater, including: detecting a rotational speed of an exhaust fan in the gas water heater; obtaining a set value for output power of the exhaust fan; and determining a wind pressure situation at an air outlet of the exhaust fan according to the rotational speed and the set value for the output power, and adjusting the set value for the output power according to the wind pressure situation.
  • the safety control method for a gas water heater firstly the rotational speed of the exhaust fan is detected and the set value for the output power of the exhaust fan is obtained, and then the wind pressure situation at the air outlet of the exhaust fan is determined according to the rotational speed and the set value for the output power and the set value for the output power is adjusted according to the wind pressure situation, such that the adjustment of rotational speed of the exhaust fan may be realized, and it is guaranteed that a good combustion condition may be achieved after mixing the introduced gas and air during the operation of the gas water heater, thus ensuring a safe and reliable operation of the gas water heater.
  • the direct adjustment of the set value for the output power is an active control, which not only has a fast response speed but also provides more accurate air volume when compared to the passive control on the rotational speed of the exhaust fan, such that the control accuracy is improved.
  • determining a wind pressure situation at an air outlet of the exhaust fan according to the rotational speed and the set value for the output power and adjusting the set value for the output power according to the wind pressure situation includes: controlling the set value for the output power to be reduced by a first predetermined value when it is determined that the wind pressure situation is a low wind pressure situation; controlling the set value for the output power to keep unchanged when it is determined that the wind pressure situation is a medium wind pressure situation; and controlling the set value for the output power to be increased by a second predetermined value when it is determined that the wind pressure situation is a high wind pressure situation.
  • determining a wind pressure situation at an air outlet of the exhaust fan according to the rotational speed and the set value for the output power and adjusting the set value for the output power according to the wind pressure situation further includes: controlling the gas water heater to shut off, when it is determined that the wind pressure situation is an extreme high wind pressure situation or the rotational speed is higher than a rotational speed threshold.
  • the above safety control method further includes: obtaining a water supply quantity of the gas water heater, a set temperature for output water of the gas water heater and a cold water temperature of the gas water heater; calculating a total heat required by the gas water heater according to the water supply quantity, the set temperature for the output water and the cold water temperature, and obtaining a current control instruction and an initial set value for the output power according to the total heat; and performing a gas burning control by controlling a proportional valve in a gas unit of the gas water heater according to the current control instruction.
  • Fig. 1 is a block diagram of a safety control system for a gas water heater according to an embodiment of the present disclosure.
  • the safety control system for a gas water heater includes an exhaust fan 10, a rotational speed detecting unit 20, a power obtaining unit 30 and an exhaust control unit 40.
  • the exhaust fan 10 is configured to exhaust waste gas generated when the gas water heater burns gas.
  • the rotational speed detecting unit 20 is configured to detect a rotational speed of the exhaust fan 10.
  • the power obtaining unit 30 is configured to obtain a set value for output power of the exhaust fan.
  • the exhaust control unit 40 is connected to the exhaust fan 10, the rotational speed detecting unit 20 and the power obtaining unit 30 respectively.
  • the exhaust control unit 40 is configured to determine a wind pressure situation at an air outlet of the exhaust fan 10 according to the rotational speed of the exhaust fan 10 and the set value for the output power of the exhaust fan 10, and to adjust the set value for the output power of the exhaust fan 10.
  • the rotational speed of the exhaust fan 10 is detected by the rotational speed detecting unit 20 in real time and the wind pressure situation at the air outlet of the exhaust fan 10 is determined in combination with the set value for the output power of the exhaust fan 10, and then the set value for the output power of the exhaust fan 10 is adjusted according to the wind pressure situation, such that the adjustment of rotational speed of the exhaust fan 10 may be realized, and it is guaranteed that a good combustion condition may be achieved after mixing the introduced gas and air during the operation of the gas water heater, thus ensuring the safety and reliability of the gas water heater.
  • the direct adjustment of the set value for the output power is an active control, which not only has a fast response speed but also provides more accurate air volume when compared to the passive control on the rotational speed of the exhaust fan, such that the control accuracy is improved and the whole system cost is low.
  • the set value for the output power of the exhaust fan 10 is controlled to be reduced by a first predetermined value when the exhaust control unit 40 determines that the wind pressure situation of the exhaust fan 10 is a low wind pressure situation; the set value for the output power of the exhaust fan 10 is controlled to keep unchanged when the exhaust control unit 40 determines that the wind pressure situation of the exhaust fan 10 is a medium wind pressure situation; and the set value for the output power of the exhaust fan 10 is controlled to be increased by a second predetermined value when the exhaust control unit 40 determines that the wind pressure situation of the exhaust fan 10 is a high wind pressure situation.
  • the first predetermined value and the second predetermined value may be determined according to actual situations, which may be fixed values or may be adjusted dynamically according to actual situations.
  • the set value for output power of the exhaust fan 10 is PI
  • the set value for output power of the exhaust fan 10 is adjusted to P1- ⁇ P1
  • the rotational speed meets a condition of C ⁇ R ⁇ B
  • the set value for output power of the exhaust fan 10 is kept unchanged
  • the rotational speed meets a condition of B ⁇ R ⁇ A
  • the set value for output power of the exhaust fan 10 is adjusted to P1+ ⁇ P2, such that the active control on the rotational speed of the exhaust fan is realized, and it is guaranteed that the air volume of the exhaust fan reaches an equilibrium with the wind pressure at the air outlet and the gas water heater would have a good combustion condition.
  • the above safety control system for a gas water heater further includes a system control unit 50.
  • the system control unit 50 is configured to perform a mutual communication with the exhaust control unit 40. If the exhaust control unit 40 determines the wind pressure situation at the air outlet is an extreme high wind pressure situation or the rotational speed of the exhaust fan 10 is higher than a rotational speed threshold, the exhaust control unit 40 sends a shut-off signal to the system control unit 50, such that the system control unit 50 controls the gas water heater to shut off according to the shut-off signal.
  • the above safety control system for a gas water heater further includes a water supply unit 60 and a temperature obtaining unit (not shown).
  • the water supply unit 60 is connected to the system control unit 50, and the temperature obtaining unit is also connected to the system control unit 50.
  • the temperature obtaining unit is configured to obtain set temperature for output water of the gas water heater and a cold water temperature of the gas water heater.
  • the system control unit 50 is configured to calculate a total heat required by the gas water heater according to a water supply quantity of the water supply unit 60, the set temperature for the output water and the cold water temperature, and to obtain a current control instruction and an initial set value for the output power of the exhaust fan 10 according to the total heat.
  • the above safety control system for a gas water heater further includes a gas unit 70 connected to the system control unit 50 and provided with a proportional valve (not shown).
  • the system control unit 50 is configured to control the gas unit 70 by controlling the proportional valve according to the current control instruction.
  • the system control unit 50 firstly calculates the total heat required by the gas water heater for warming the cold water to the set temperature for output water according to the set temperature for output water set by the user, the water supply quantity of the water supply unit 60 and the cold water temperature. And then, as shown in Fig. 4 , the system control unit 50 obtains the control quantity (i.e., the current control instruction) of the proportional valve in the gas unit 70 and the set value for output power to be configured as an initial set value for output power according to the total heat required by the gas water heater. Finally, the system control unit 50 controls the proportional valve according to the obtained control quantity so as to control the gas unit 70, and sends the initial set value for output power to the exhaust control unit 40 via the CAN bus or the like.
  • the control quantity i.e., the current control instruction
  • the system control unit 50 obtains the control quantity of the proportional valve and the initial set value for output power again, and controls the gas water heater based on the above-mentioned procedure.
  • the gas water heater may be a forced exhaust type gas water heater, which is not limited herein.
  • the exhaust control unit determines the wind pressure situation at the air outlet of the exhaust fan according to the rotational speed and the set value for output power and adjusts the set value for the output power of the exhaust fan according to the wind pressure situation, such that the adjustment of rotational speed of the exhaust fan may be realized, and it is guaranteed that a good combustion condition may be achieved after mixing the introduced gas and air during the operation of the gas water heater, thus ensuring the safe and reliable operation of the gas water heater.
  • the direct adjustment of the set value for the output power is an active control, which not only has a fast response speed but also provides more accurate air volume when compared to the passive control on the rotational speed of the exhaust fan, such that the control accuracy is improved and the whole system cost is low.
  • Fig. 5 is a flow chart of a safety control method for a gas water heater according to an embodiment of the present disclosure. As shown in Fig. 5 , the safety control method includes following steps.
  • step S1 a rotational speed of an exhaust fan in the gas water heater is detected.
  • step S2 a set value for output power of the exhaust fan is obtained.
  • step S3 a wind pressure situation at an air outlet of the exhaust fan is determined according to the rotational speed and the set value for output power, and the set value for output power is adjusted according to the wind pressure situation.
  • the rotational speed of the exhaust fan is detected in real time, and the wind pressure situation at the air outlet of the exhaust fan is determined in combination with the set value for the output power of the exhaust fan, and then the set value for the output power of the exhaust fan is adjusted according to the wind pressure situation, such that the adjustment of rotational speed of the exhaust fan may be realized, and it is guaranteed that a good combustion condition may be achieved after mixing the introduced gas and air during the operation of the gas water heater, thus ensuring the safety and reliability of the gas water heater.
  • the direct adjustment of the set value for the output power is an active control, which not only has a fast response speed but also provides more accurate air volume when compared to the passive control on the rotational speed of the exhaust fan, such that the control accuracy is improved.
  • determining a wind pressure situation at an air outlet of the exhaust fan according to the rotational speed and the set value for the output power and adjusting the set value for the output power according to the wind pressure situation includes: controlling the set value for the output power to be reduced by a first predetermined value when it is determined that the wind pressure situation is a low wind pressure situation; controlling the set value for the output power to keep unchanged when it is determined that the wind pressure situation is a medium wind pressure situation; and controlling the set value for the output power to be increased by a second predetermined value when it is determined that the wind pressure situation is a high wind pressure situation.
  • determining a wind pressure situation at an air outlet of the exhaust fan according to the rotational speed and the set value for the output power and adjusting the set value for the output power according to the wind pressure situation further includes: controlling the gas water heater to shut off, when it is determined that the wind pressure situation is an extreme high wind pressure situation or the rotational speed is higher than a rotational speed threshold.
  • the above safety control method further includes: obtaining a water supply quantity of the gas water heater, a set temperature for output water of the gas water heater and a cold water temperature of the gas water heater; calculating a total heat required by the gas water heater according to the water supply quantity, the set temperature for the output water and the cold water temperature, and obtaining a current control instruction and an initial set value for the output power according to the total heat; and performing a gas burning control by controlling a proportional valve in a gas unit of the gas water heater according to the current control instruction.
  • the control quantity i.e., the current control instruction
  • the proportional valve in the gas unit and the set value for output power to be configured as an initial set value for output power are obtained according to the total heat required by the gas water heater.
  • the proportional valve is controlled according to the obtained control quantity so as to control the gas unit, and the exhaust fan is controlled according to the initial set value for output power.
  • the rotational speed of the exhaust fan is detected in real time, and is determined.
  • the control quantity of the proportional valve and the initial set value for output power are obtained again, and the gas water heater is controlled based on the above-mentioned procedure.
  • the safety control method for a gas water heater firstly the rotational speed of the exhaust fan is detected and the set value for the output power of the exhaust fan is obtained, and then the wind pressure situation at the air outlet of the exhaust fan is determined according to the rotational speed and the set value for the output power and the set value for the output power is adjusted according to the wind pressure situation, such that the adjustment of rotational speed of the exhaust fan may be realized, and it is guaranteed that a good combustion condition may be achieved after mixing the introduced gas and air during the operation of the gas water heater, thus ensuring a safe and reliable operation of the gas water heater.
  • the direct adjustment of the set value for the output power is an active control, which not only has a fast response speed but also provides more accurate air volume when compared to the passive control on the rotational speed of the exhaust fan, such that the control accuracy is improved.
  • a gas water heater according to embodiments of the present disclosure, which includes the above safety control system for a gas water heater.
  • the gas water heater may determine the wind pressure situation at the air outlet of the exhaust fan according to the rotational speed and the set value for the output power and adjust the set value for the output power according to the wind pressure situation, such that the adjustment of rotational speed of the exhaust fan may be realized, and it is guaranteed that a good combustion condition may be achieved after mixing the introduced gas and air during the operation of the gas water heater, thus ensuring the safe and reliable operation of the gas water heater.
  • the direct adjustment of the set value for the output power is an active control, which not only has a fast response speed but also provides more accurate air volume when compared to the passive control on the rotational speed of the exhaust fan, such that the control accuracy is improved.
  • first and second are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features.
  • the feature defined with “first” and “second” may comprise one or more of this feature.
  • a plurality of' means two or more than two, unless specified otherwise.
  • the terms “mounted,” “connected,” “coupled,” “fixed” and the like are used broadly, and may be, for example, fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections; may also be direct connections or indirect connections via intervening structures; may also be inner communications of two elements, which can be understood by those skilled in the art according to specific situations.
  • a structure in which a first feature is "on" or “below” a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are not in direct contact with each other, but are contacted via an additional feature formed therebetween.
  • a first feature "on,” “above,” or “on top of' a second feature may include an embodiment in which the first feature is right or obliquely “on,” “above,” or “on top of' the second feature, or just means that the first feature is at a height higher than that of the second feature; while a first feature "below,” “under,” or “on bottom of' a second feature may include an embodiment in which the first feature is right or obliquely “below,” “under,” or “on bottom of' the second feature, or just means that the first feature is at a height lower than that of the second feature.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Regulation And Control Of Combustion (AREA)
EP16869368.7A 2016-08-31 2016-12-29 Gaswassererhitzer und sicherheitssteuerungsverfahren und -system dafür Active EP3312523B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610792278.6A CN107781999A (zh) 2016-08-31 2016-08-31 燃气热水器及其安全控制系统和方法
PCT/CN2016/113301 WO2018040433A1 (zh) 2016-08-31 2016-12-29 燃气热水器及其安全控制系统和方法

Publications (3)

Publication Number Publication Date
EP3312523A1 true EP3312523A1 (de) 2018-04-25
EP3312523A4 EP3312523A4 (de) 2018-04-25
EP3312523B1 EP3312523B1 (de) 2019-09-25

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EP16869368.7A Active EP3312523B1 (de) 2016-08-31 2016-12-29 Gaswassererhitzer und sicherheitssteuerungsverfahren und -system dafür

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EP (1) EP3312523B1 (de)
CN (1) CN107781999A (de)
ES (1) ES2763798T3 (de)
WO (1) WO2018040433A1 (de)

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