WO2018040433A1 - Chauffe-eau à gaz et système de commande de sécurité et procédé associé - Google Patents

Chauffe-eau à gaz et système de commande de sécurité et procédé associé Download PDF

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Publication number
WO2018040433A1
WO2018040433A1 PCT/CN2016/113301 CN2016113301W WO2018040433A1 WO 2018040433 A1 WO2018040433 A1 WO 2018040433A1 CN 2016113301 W CN2016113301 W CN 2016113301W WO 2018040433 A1 WO2018040433 A1 WO 2018040433A1
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WIPO (PCT)
Prior art keywords
exhaust fan
water heater
gas water
output power
exhaust
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/CN2016/113301
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English (en)
Chinese (zh)
Inventor
薛承志
代先锋
梁国荣
唐晓峨
钱晓林
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
Priority to ES16869368T priority Critical patent/ES2763798T3/es
Priority to EP16869368.7A priority patent/EP3312523B1/fr
Publication of WO2018040433A1 publication Critical patent/WO2018040433A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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 invention relates to the technical field of water heaters, in particular to a gas water heater and a safety control system and method thereof.
  • gas water heaters commonly found in the market include: D type (natural exhaust type), Q type (forced exhaust type), P type (natural exhaust), type G (forced exhaust) and W type (outdoor) Setup) and so on.
  • D type natural exhaust type
  • Q type forced exhaust type
  • P type natural exhaust
  • type G forced exhaust
  • W type outdoor
  • the Q-type gas water heater mostly uses the wind pressure detecting unit to detect the wind pressure of the tuyere, and then controls the exhaust fan and the ignition unit according to the detected wind pressure to ensure that the gas water heater can work normally.
  • the wind pressure detecting unit can avoid the burning operation of the gas water heater under the condition of wind pressure backflow, the cost of the device is high, and the gas water heater is likely to be stopped due to slight wind pressure, and the user cannot use the gas normally.
  • the present invention aims to solve at least one of the technical problems in the related art to some extent.
  • the first object of the present invention is to provide a safety control system for a gas water heater, which can ensure that the gas water heater has good combustion conditions, ensure safe and reliable operation of the gas water heater, and has a fast response speed and can provide accurate
  • the air volume increases the control accuracy and the cost is relatively low.
  • a second object of the invention is to propose a gas water heater.
  • a third object of the present invention is to provide a safety control method for a gas water heater.
  • a first aspect of the present invention provides a safety control system for a gas water heater, comprising: an exhaust fan for exhausting exhaust gas generated when a gas water heater is burned; and a rotation speed detecting unit for detecting the row a speed of the fan; a power acquisition unit for obtaining an output power set value of the exhaust fan; and an exhaust control unit, the exhaust control unit and the exhaust fan, the rotation speed detecting unit, and the power acquisition
  • the units are respectively connected to determine the wind pressure of the air outlet of the exhaust fan according to the rotation speed of the exhaust fan and the output power of the exhaust fan, and adjust the wind pressure according to the air outlet of the exhaust fan.
  • the output power of the exhaust fan is given.
  • the rotation speed of the exhaust fan is first detected by the rotation speed detecting unit, and the output power of the exhaust fan is obtained by the power acquisition unit, and then the exhaust control unit is based on the rotation speed of the exhaust fan.
  • the output power of the exhaust fan determines the air pressure of the air outlet of the exhaust fan, and adjusts the output power of the exhaust fan according to the air pressure of the air outlet of the exhaust fan, thereby realizing the adjustment of the rotational speed of the exhaust fan to ensure
  • the introduced gas and air can achieve good combustion conditions and ensure gas heat.
  • the water is safe and reliable.
  • the output power of the exhaust fan is directly adjusted to the active control. Compared with the passive control of the exhaust fan speed, the response speed is fast, and the accurate air volume can be provided, and the control precision is improved.
  • the cost of the entire system is relatively low.
  • the exhaust air control unit determines the wind pressure of the air outlet of the exhaust fan according to the rotational speed of the exhaust fan and the output power of the exhaust fan, and according to the exhaust fan
  • the air outlet pressure condition adjusts the output power of the exhaust fan
  • the row is controlled
  • the output power of the fan is decreased by a first preset value; if the exhaust control unit determines that the wind pressure of the air outlet of the exhaust fan is a wind pressure condition, the output power of the exhaust fan is controlled to be maintained. If the exhaust control unit determines that the air outlet pressure of the exhaust fan is a high wind pressure condition, the output power of the exhaust fan is controlled to increase by a second preset value.
  • the safety control system for a gas water heater further includes a system control unit, wherein the system control unit and the exhaust control unit communicate with each other, wherein if the exhaust control unit determines The wind pressure of the air outlet of the exhaust fan is the highest wind pressure condition, or the speed of the exhaust fan is greater than the speed threshold, and the exhaust control unit sends a stop signal to the system control unit, so that the system control unit The gas water heater is stopped according to the shutdown signal.
  • the safety control system for a gas water heater further includes: a water supply unit, the water supply unit is connected to the system control unit; a temperature acquisition unit, the temperature acquisition unit, and the system control unit Connected to obtain an outlet set temperature of the gas water heater and a cold water temperature of the gas water heater, wherein the system control unit sets a temperature according to the water supply unit, the outlet water setting temperature, and the cold water temperature. Calculating the total heat required by the gas water heater, and obtaining a current control command and an initial output power given value of the exhaust fan according to the total heat required by the gas water heater.
  • the safety control system for a gas water heater further includes a gas unit, the gas unit being connected to the system control unit, the gas unit having a proportional valve, wherein the system control unit is The current control command controls the gas unit by controlling the proportional valve.
  • the gas water heater is a forced exhaust gas water heater.
  • a second aspect of the present invention provides a gas water heater including the above-described safety control system for a gas water heater.
  • the gas water heater of the embodiment of the present invention can determine the wind pressure of the air outlet of the exhaust fan according to the rotation speed of the exhaust fan and the output power of the exhaust fan through the above-mentioned safety control system, and according to the air pressure of the air outlet of the exhaust fan Adjusting the output power of the exhaust fan to adjust the speed of the exhaust fan to ensure that the gas water heater is mixed with the air to achieve good combustion conditions during operation, ensuring safe and reliable operation of the gas water heater And, since the output power of the exhaust fan is directly adjusted to the active control, compared to the exhaust fan Passive control of the rotational speed not only provides fast response, but also provides a more accurate air volume and improves control accuracy.
  • a third aspect of the present invention provides a safety control method for a gas water heater, comprising the steps of: detecting a rotational speed of an exhaust fan in the gas water heater; and obtaining a set value of an output power of the exhaust fan; And determining, according to the rotational speed of the exhaust fan and the output power of the exhaust fan, the wind pressure of the air outlet of the exhaust fan, and adjusting the output of the exhaust fan according to the air pressure of the air outlet of the exhaust fan; Power setpoint.
  • the rotational speed of the exhaust fan is first detected, and the output power of the exhaust fan is obtained, and then the exhaust fan is determined according to the rotational speed of the exhaust fan and the output power of the exhaust fan.
  • the air pressure of the air outlet is adjusted, and the output power of the exhaust fan is adjusted according to the air pressure of the air outlet of the exhaust fan, thereby realizing the adjustment of the rotational speed of the exhaust fan, ensuring the gas and the introduced gas during the operation of the gas water heater After the air is mixed, it can achieve good combustion conditions and ensure the safe and reliable operation of the gas water heater.
  • the output power of the exhaust fan is directly adjusted to active control. Compared with the passive control of the exhaust fan speed, not only the response speed is fast, but also a relatively accurate air volume can be provided, and the control precision is improved.
  • the wind pressure of the air outlet of the exhaust fan is determined according to the rotational speed of the exhaust fan and the output power of the exhaust fan, and according to the air pressure of the air outlet of the exhaust fan Adjusting the output power of the exhaust fan, including: if it is determined that the air outlet pressure of the exhaust fan is a low wind pressure condition, controlling the output power of the exhaust fan to decrease the first preset value If it is determined that the wind pressure of the air outlet of the exhaust fan is a wind pressure condition, the output power of the exhaust fan is controlled to remain unchanged; if the air pressure of the air outlet of the exhaust fan is determined to be a high wind pressure In the case, the output power of the exhaust fan is controlled to increase by a second preset value.
  • the wind pressure of the air outlet of the exhaust fan is determined according to the rotational speed of the exhaust fan and the output power of the exhaust fan, and according to the air pressure of the air outlet of the exhaust fan Adjusting the output power of the exhaust fan, the method further includes: if the wind pressure of the air outlet of the exhaust fan is determined to be the highest wind pressure condition, or the speed of the exhaust fan is greater than the speed threshold, then the gas water heater is controlled Stop.
  • the safety control method of the gas water heater further includes: acquiring a water supply amount of the gas water heater, acquiring a water set temperature of the gas water heater, and acquiring a cold water temperature of the gas water heater Calculating a total heat required by the gas water heater according to the water supply amount, the water set temperature, and the cold water temperature, and obtaining a current control command and an initial output of the exhaust fan according to the total heat required by the gas water heater a power set value; controlling the combustion by controlling a proportional valve of the gas unit in the gas water heater according to the current control command.
  • FIG. 1 is a block diagram of a safety control system for a gas water heater in accordance with one embodiment of the present invention
  • FIG. 2 is a graph showing a relationship between an output power set value of an exhaust fan and a rotational speed of an exhaust fan according to an embodiment of the present invention
  • FIG. 3 is a block diagram of a safety control system for a gas water heater according to another embodiment of the present invention.
  • FIG. 5 is a flow chart of a method of safety control of a gas water heater according to an embodiment of the present invention.
  • the safety control system of the gas water heater includes an exhaust fan 10, a rotation speed detecting unit 20, a power acquisition unit 30, and an exhaust air control unit 40.
  • the exhaust fan 10 is used for exhausting exhaust gas generated when the gas water heater is burned.
  • the rotation speed detecting unit 20 is for detecting the rotation speed of the exhaust fan.
  • the power obtaining unit 30 is configured to obtain an output power given value of the exhaust fan.
  • the exhaust air control unit 40 is connected to the exhaust fan 10, the rotational speed detecting unit 20 and the power acquiring unit 30, respectively, for determining the air outlet pressure of the exhaust fan 10 according to the rotational speed of the exhaust fan 10 and the output power of the exhaust fan 10. And adjusting the output power of the exhaust fan 10 according to the air outlet pressure of the exhaust fan.
  • the rotation speed detecting unit 20 detects the rotation speed of the exhaust fan 10 in real time, and determines the wind pressure of the air outlet of the exhaust fan 10 according to the current output power setting value of the exhaust fan 10, and then according to the outflow
  • the tuyere wind pressure condition adjusts the output power setting value of the exhaust fan 10, thereby realizing the adjustment of the rotation speed of the exhaust fan 10, ensuring that the gas water heater is mixed with the air to achieve good combustion conditions during the operation of the gas water heater.
  • the output power of the exhaust fan is directly adjusted to the active control. Compared with the passive control of the exhaust fan speed, the response speed is fast, and the accurate air volume can be provided, and the control precision is improved. The cost of the entire system is relatively low.
  • the exhaust air control unit 40 determines the wind pressure of the air outlet of the exhaust fan 10 according to the rotational speed of the exhaust fan 10 and the output power of the exhaust fan 10, and according to the air outlet of the exhaust fan 10 Pressure regulation When the output power of the fan 10 is given a value, if the exhaust air control unit 40 determines that the air outlet pressure of the exhaust fan 10 is a low wind pressure condition, the output power of the exhaust fan 10 is controlled to decrease by a first preset.
  • the exhaust air control unit 40 determines that the air outlet pressure of the exhaust fan 10 is a neutral pressure condition, the output power of the exhaust fan 10 is kept constant; if the exhaust control unit 40 determines the outlet of the exhaust fan 10 When the tuyere wind pressure condition is a high wind pressure condition, the output power of the exhaust fan 10 is controlled to increase by a second preset value.
  • the first preset value and the second preset value may be calibrated according to actual conditions, and the first preset value and the second preset value may be fixed values, or may be dynamically adjusted according to actual conditions.
  • the output power of the exhaust fan 10 is given as P1
  • the detected rotational speed of the exhaust fan 10 is R ⁇ C
  • the output power of the exhaust fan 10 is set to P1- ⁇ P1
  • ⁇ R ⁇ B the output power of the exhaust fan 10 is kept constant by P1
  • B ⁇ R ⁇ A the output power of the exhaust fan 10 is adjusted to P1 + ⁇ P2, thereby realizing the exhaust fan
  • the active control of the speed ensures that the air volume of the exhaust fan and the wind pressure of the air outlet can be quickly balanced to ensure that the gas water heater has good combustion conditions.
  • the safety control system of the gas water heater further includes: a system control unit 50, and the system control unit 50 and the exhaust control unit 40 communicate with each other, wherein if the exhaust control The unit 40 determines that the air outlet pressure of the exhaust fan 10 is the highest wind pressure condition, or the exhaust speed of the exhaust fan 10 is greater than the speed threshold, and the exhaust control unit 40 sends a shutdown signal to the system control unit 50 to cause the system control unit 50 to The shutdown signal controls the gas water heater to stop.
  • the air outlet of the exhaust fan 10 is illustrated.
  • the wind pressure is too high, and it is necessary to control the gas water heater to stop.
  • the output power of the exhaust fan 10 is given as P1
  • the speed of the exhaust fan 10 is R ⁇ A
  • the gas water heater is controlled to be stopped; or, if current The speed of the exhaust fan 10 is higher than the set speed threshold (the highest limit speed), then the hot water heater is controlled to stop, thereby effectively ensuring the safety of the gas water heater.
  • the safety control system of the gas water heater described above further includes: The water supply unit 60 and the temperature acquisition unit (not specifically shown in the drawings).
  • the water supply unit 60 is connected to the system control unit 50, and the temperature acquisition unit is connected to the system control unit 50.
  • the temperature acquisition unit is configured to acquire the water set temperature of the gas water heater and the cold water temperature of the gas water heater.
  • the system control unit 50 is configured according to the water supply unit 60.
  • the water supply amount, the effluent set temperature and the cold water temperature are used to calculate the total heat required by the gas water heater, and the current control command and the initial output power of the exhaust fan 10 are obtained according to the total heat required by the gas water heater.
  • the safety control system of the gas water heater further includes: a gas unit 70 connected to the system control unit 50, and the gas unit 70 has a proportional valve (not specifically shown), wherein The system control unit 50 controls the gas unit 70 by controlling the proportional valve according to the current control command.
  • the system control unit 50 first calculates the gas water heater to heat the cold water to the set water temperature according to the set water temperature of the gas water heater set by the user, the water supply amount of the water supply unit 60, and the cold water temperature. The total heat required, then, as shown in FIG. 4, the system control unit 50 acquires the control amount of the proportional valve (ie, the current control command) in the gas unit 70 according to the total heat required by the gas water heater, and acquires the output power of the exhaust fan 10 to The value is set as the initial output power reference. Finally, the system control unit 50 controls the proportional valve according to the acquired control amount of the proportional valve to control the gas unit 70, and transmits the initial output power set value to the exhaust control unit 40 through the CAN bus or the like.
  • the proportional valve ie, the current control command
  • the system control unit 50 reacquires the control amount of the proportional valve and the initial output power of the gas water heater, and according to the above The steps control the gas water heater.
  • the gas water heater may be a forced exhaust gas water heater, which is not limited herein.
  • the rotation speed of the exhaust fan is first detected by the rotation speed detecting unit, and the output power of the exhaust fan is obtained by the power acquisition unit, and then the exhaust control unit is based on the rotation speed of the exhaust fan.
  • the output power of the exhaust fan determines the air pressure of the air outlet of the exhaust fan, and adjusts the output power of the exhaust fan according to the air pressure of the air outlet of the exhaust fan, thereby realizing the adjustment of the rotational speed of the exhaust fan to ensure
  • the introduced gas and air can achieve good combustion conditions and ensure gas heat.
  • the water is safe and reliable.
  • the output power of the exhaust fan is directly adjusted to the active control. Compared with the passive control of the exhaust fan speed, the response speed is fast, and the accurate air volume can be provided, and the control precision is improved.
  • the cost of the entire system is relatively low.
  • FIG. 5 is a flow chart of a method of safety control of a gas water heater according to an embodiment of the present invention. As shown in FIG. 5, the safety control method of the gas water heater includes the following steps:
  • the rotational speed of the exhaust fan is detected in real time, and the wind output of the exhaust fan of the exhaust fan is determined according to the current output power of the exhaust fan, and then the exhaust fan is according to the wind pressure of the air outlet.
  • the output power is adjusted to adjust the speed of the exhaust fan to ensure that the gas water heater is mixed with the air to achieve good combustion conditions during operation, ensuring the safety and reliability of the gas water heater.
  • the output power of the exhaust fan is directly adjusted to active control. Compared with the passive control of the exhaust fan speed, not only the response speed is fast, but also a relatively accurate air volume can be provided, and the control precision is improved.
  • the wind pressure of the air outlet of the exhaust fan is determined according to the rotational speed of the exhaust fan and the output power of the exhaust fan, and the output power of the exhaust fan is adjusted according to the air pressure of the air outlet of the exhaust fan.
  • the fixed value includes: if it is determined that the air outlet pressure of the exhaust fan is a low wind pressure condition, the output power of the exhaust fan is controlled to decrease by a first preset value; if it is determined that the air outlet of the exhaust fan is a stroke In the case of pressure, the output power of the exhaust fan is kept constant; if it is judged that the air pressure of the air outlet of the exhaust fan is a high wind pressure condition, the output power of the exhaust fan is increased by a second preset value.
  • the wind pressure increases, the exhaust air is exhausted due to the physical characteristics of the exhaust fan.
  • the opportunity naturally increases the speed, so there is no need to adjust the output power setpoint of the exhaust fan; if the speed R of the exhaust fan is above the second curve R2 and below the third curve R3 (Zone III), then the exhaust fan is The wind pressure at the air outlet is relatively large. At this time, the output power of the exhaust fan is controlled to increase by a second preset value, that is, the output power set value P P+ ⁇ P2 to increase the speed of the exhaust fan.
  • the output power of the exhaust fan is given as P1
  • the detected exhaust fan speed R ⁇ C the output power of the exhaust fan is set to P1- ⁇ P1
  • C ⁇ R ⁇ B the output power of the exhaust fan is kept constant.
  • P1 is unchanged
  • B ⁇ R ⁇ A the output power of the exhaust fan is adjusted to P1+ ⁇ P2, so that the active control of the exhaust fan speed can be realized, and the air volume of the exhaust fan and the wind pressure of the air outlet can be ensured.
  • the balance is quickly reached to ensure that the gas water heater has good combustion conditions.
  • the wind pressure of the air outlet of the exhaust fan is determined according to the rotational speed of the exhaust fan and the output power of the exhaust fan, and the output power of the exhaust fan is adjusted according to the air pressure of the air outlet of the exhaust fan, and includes: If it is judged that the wind pressure of the air outlet of the exhaust fan is the highest wind pressure condition, or the speed of the exhaust fan is greater than the speed threshold, the gas water heater is controlled to stop.
  • the safety control method of the gas water heater further includes: obtaining a water supply amount of the gas water heater, obtaining a water set temperature of the gas water heater, and acquiring a cold water temperature of the gas water heater; and according to the water supply amount and the water output Set the temperature and cold water temperature to calculate the total heat required by the gas water heater, and obtain the current control command and the initial output power of the exhaust fan according to the total heat required by the gas water heater; and control the proportion of the gas unit in the gas water heater according to the current control command Valve for combustion control.
  • the total heat required for the gas water heater to heat the cold water to the set temperature of the water outlet is calculated according to the set water temperature, the water supply amount and the cold water temperature of the gas water heater set by the user, and then, for example, As shown in FIG. 4, the control quantity of the proportional valve in the gas unit (ie, the current control command) is obtained according to the total heat required by the gas water heater, and the output power set value of the exhaust fan is obtained as the initial output power given value. Finally, the proportional valve is controlled according to the obtained control amount of the proportional valve to control the gas unit, and the exhaust fan is controlled according to the initial output power given value.
  • the speed of the exhaust fan is detected in real time and judged.
  • the cycle is continued until the output speed of the exhaust fan is in the area IV, or the speed of the exhaust fan is greater than the speed threshold, or the user control stop command is received to control the gas water heater to stop.
  • the control amount of the proportional valve and the initial output power of the gas water heater are regained, and the gas water heater is controlled according to the above steps.
  • the rotational speed of the exhaust fan is first detected, and the output power of the exhaust fan is obtained, and then the exhaust fan is determined according to the rotational speed of the exhaust fan and the output power of the exhaust fan.
  • the air pressure of the air outlet is adjusted, and the output power of the exhaust fan is adjusted according to the air pressure of the air outlet of the exhaust fan, thereby realizing the adjustment of the rotational speed of the exhaust fan, ensuring the gas and the introduced gas during the operation of the gas water heater After the air is mixed, it can achieve good combustion conditions and ensure the safe and reliable operation of the gas water heater.
  • the output power of the exhaust fan is directly adjusted to active control. Compared with the passive control of the exhaust fan speed, not only the response speed is fast, but also a relatively accurate air volume can be provided, and the control precision is improved.
  • embodiments of the present invention also provide a gas water heater including the above-described safety control system for a gas water heater.
  • the gas water heater of the embodiment of the present invention can determine the wind pressure of the air outlet of the exhaust fan according to the rotation speed of the exhaust fan and the output power of the exhaust fan through the above-mentioned safety control system, and according to the air pressure of the air outlet of the exhaust fan Adjusting the output power of the exhaust fan to adjust the speed of the exhaust fan to ensure that the gas water heater is mixed with the air to achieve good combustion conditions during operation, ensuring safe and reliable operation of the gas water heater Moreover, since the output power of the exhaust fan is directly adjusted to the active control, compared with the passive control of the exhaust speed of the exhaust fan, not only the response speed is fast, but also a relatively accurate air volume can be provided, and the control precision is improved. .
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of "a plurality” is at least two, such as two, three, etc., unless specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements, unless otherwise specified Limited.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the first feature may be “on” or “under” the second feature unless otherwise specifically stated and defined.
  • the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.
  • the first feature "above”, “above” and “above” the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

Landscapes

  • 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)

Abstract

L'invention concerne un chauffe-eau à gaz et un système de commande de sécurité et un procédé associé. Le système comprend : un extracteur d'air (10) utilisé pour évacuer le gaz d'échappement produit pendant la combustion par un chauffe-eau à gaz; une unité de détection de vitesse de rotation (20) utilisée pour détecter la vitesse de rotation de l'extracteur d'air (10); une unité d'acquisition de puissance (30) utilisée pour acquérir une valeur donnée de puissance de sortie de l'extracteur d'air (10); et une unité de commande d'extraction d'air (40) respectivement connectée à l'extracteur d'air (10), à l'unité de détection de vitesse de rotation (20) et à l'unité d'acquisition de puissance (30), et utilisée pour déterminer une condition de pression d'air d'une sortie d'air de l'extracteur d'air (10) en fonction de la vitesse de rotation et de la valeur donnée de puissance de sortie de l'extracteur d'air (10) et pour ajuster la valeur donnée de puissance de sortie de l'extracteur d'air (10) en fonction de l'état de pression d'air de la sortie d'air de l'extracteur d'air (10). Le système peut garantir qu'un chauffe-eau à gaz présente de bonnes conditions d'allumage, assure un fonctionnement sûr et fiable de celui-ci et améliore la précision de commande.
PCT/CN2016/113301 2016-08-31 2016-12-29 Chauffe-eau à gaz et système de commande de sécurité et procédé associé Ceased WO2018040433A1 (fr)

Priority Applications (2)

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ES16869368T ES2763798T3 (es) 2016-08-31 2016-12-29 Calentador de agua a gas y sistema de control de seguridad y procedimiento para el mismo
EP16869368.7A EP3312523B1 (fr) 2016-08-31 2016-12-29 Chauffe-eau à gaz et système de commande de sécurité et procédé associé

Applications Claiming Priority (2)

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CN201610792278.6 2016-08-31
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

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WO2018040433A1 true WO2018040433A1 (fr) 2018-03-08

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EP (1) EP3312523B1 (fr)
CN (1) CN107781999A (fr)
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WO (1) WO2018040433A1 (fr)

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CN109028594B (zh) * 2018-06-01 2021-06-15 广东万和热能科技有限公司 燃气采暖热水炉空燃比控制方法、装置及燃气采暖热水炉
CN110207387A (zh) * 2018-09-04 2019-09-06 华帝股份有限公司 燃气热水器风压系统自适应的控制方法
CN110207362B (zh) * 2018-11-08 2021-08-06 华帝股份有限公司 一种燃气热水器风量自适应控制方法
CN110779214B (zh) * 2019-09-29 2021-04-27 华帝股份有限公司 一种燃气热水器的控制方法
CN110953729B (zh) * 2019-12-17 2021-09-17 华帝股份有限公司 一种燃气热水器的控制方法

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JPH09261988A (ja) * 1996-03-26 1997-10-03 Noritz Corp 直流モータ制御装置
JPH10220741A (ja) * 1997-01-31 1998-08-21 Noritz Corp ファンモータ制御装置
CN1752523A (zh) * 2004-09-21 2006-03-29 林内株式会社 燃烧装置
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ES2763798T3 (es) 2020-06-01
EP3312523A4 (fr) 2018-04-25
EP3312523A1 (fr) 2018-04-25
CN107781999A (zh) 2018-03-09

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