CN110822720B - Wall-mounted boiler safety fault control method - Google Patents

Wall-mounted boiler safety fault control method Download PDF

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CN110822720B
CN110822720B CN201910977833.6A CN201910977833A CN110822720B CN 110822720 B CN110822720 B CN 110822720B CN 201910977833 A CN201910977833 A CN 201910977833A CN 110822720 B CN110822720 B CN 110822720B
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wall
water
threshold value
temperature
mounted boiler
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CN110822720A (en
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朱嘉宏
潘叶江
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Vatti Co Ltd
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Vatti Co Ltd
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    • 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

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  • General Engineering & Computer Science (AREA)
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Abstract

The invention belongs to the technical field of wall-mounted furnaces and discloses control of safety faults of the wall-mounted furnacesThe method comprises the following steps: s1, burning by a burner of the wall-hanging stove; s2, detecting the concentration C of indoor harmful gas in real time; s3, judging whether the concentration C of the harmful gas meets the following requirements: c is greater than CThreshold value(ii) a If not, returning to S2; if yes, flameout the combustor of the wall-mounted furnace, closing the air inlet valve, and enabling the wall-mounted furnace to enter a safety protection state; s4, detecting the concentration C' of the harmful gas in the room again in real time under the condition that the wall-mounted furnace is under the safety protection state; and judging whether the concentration C' of the harmful gas in the first time threshold meets the following conditions: c' is less than or equal to CThreshold value(ii) a If yes, switching the wall-mounted boiler from a safety protection state to a standby state after the first time threshold value; if not, the wall-mounted boiler continues to maintain the safety protection state. The method can further improve the safety of the wall-hanging stove in use.

Description

Wall-mounted boiler safety fault control method
Technical Field
The invention belongs to the technical field of wall-mounted furnaces, and particularly relates to a wall-mounted furnace safety fault control method.
Background
The wall-mounted boiler generally comprises three working modes, namely a domestic water mode, a heating mode and an anti-freezing mode. Generally, when the water outlet flow rate and the water outlet temperature of the water outlet pipe both meet the preset threshold value when the wall-mounted boiler is switched to the domestic water mode, the wall-mounted boiler is automatically switched to the domestic water mode, and at the moment, the burner is automatically ignited to provide domestic hot water for users. When the outlet water temperature of the heating outlet pipe meets the preset threshold value when the wall-mounted boiler is switched into the heating mode, the wall-mounted boiler is automatically switched into the heating mode, and the burner is automatically ignited at the moment to provide heating hot water for users. When the outlet water temperature in the warm outlet water pipe is lower than the preset maximum temperature value of the anti-freezing mode, the wall-mounted furnace is automatically switched to the anti-freezing mode, and the combustor ignites and burns to prevent freezing or directly reports faults. The current wall-hanging stove comprises a primary anti-freezing mode, a secondary anti-freezing mode and a tertiary anti-freezing mode.
In the actual use process of the wall-mounted boiler, if a safety fault occurs, gas leakage or insufficient combustion of the gas can be caused, and further harmful gases such as CO and CH in a user room can be caused4Is above the safe concentration value. To solve this problem, the alarm is usually used to warn the user to open the door or the window, but this method requires the user to enter the CO and CH4In the room with excessive concentration, and the user is opening the door and opening the windowSometimes, it may cause unpredictable damage to the user's life health.
Disclosure of Invention
In view of this, the invention provides a method for controlling a safety fault of a wall-mounted boiler, which can reduce potential safety hazards.
A method for controlling the safety fault of a wall-hanging stove comprises the following steps:
s1, combusting by using a combustor of the wall-hanging stove;
s2, detecting the concentration C of indoor harmful gas in real time;
s3, judging whether the concentration C of the harmful gas meets the following requirements: c is greater than CThreshold valueWherein, CThreshold valueIs a concentration threshold of the harmful gas within the chamber; if not, returning to S2; if yes, flameout the combustor of the wall-mounted furnace, closing the air inlet valve, and enabling the wall-mounted furnace to enter a safety protection state;
s4, detecting the concentration C' of the harmful gas in the room again in real time under the condition that the wall-mounted furnace is under the safety protection state; and judging whether the concentration C' of the harmful gas in the first time threshold meets the following conditions: c' is less than or equal to CThreshold value(ii) a If yes, switching the wall-mounted boiler from a safety protection state to a standby state after the first time threshold value; if not, the wall-mounted boiler continues to maintain the safety protection state.
Preferably, S3 further includes the steps of:
if yes, go to S31;
s31, extinguishing the burner and closing an air inlet valve; judging whether the combustor reaches the condition of ignition combustion or not; if yes, the burner continues to maintain a flameout state; if not, S4 is performed.
Preferably, the S31 further includes the following steps:
s31, extinguishing the burner and closing an air inlet valve;
s311, judging the water outlet flow velocity V of the water outlet pipe of the wall-mounted boiler0And the water outlet temperature T of the water outlet pipe of the wall-mounted boilerGo outWhether or not: v0≥VThreshold valueAnd T isGo out≤TThreshold valueWherein, in the step (A),Vthreshold valueThe water outlet flow speed threshold value T of the water outlet pipe is used for users to use domestic waterThreshold valueThe water outlet temperature threshold of the water outlet pipe is set when the domestic water is used by a user; if yes, the burner is kept in a flameout state, and the water outlet pipe discharges cold water; if not, go to S312;
s312, judging the outlet water temperature T of the heating outlet pipe of the wall-mounted boilerProductionWhether or not: t isProduction≤TTarget-TRecovery ofWherein, TTargetTo a preset heating temperature, TRecovery ofThe water return temperature of the heating water return pipe of the wall-mounted furnace is the water return temperature of the heating water return pipe of the wall-mounted furnace; if so, the burner is kept in a flameout state and is used for pumping water in the heating water return pipe back to the built-in water pump in the wall-mounted boiler to be started; if not, performing S313;
s313, judging the water outlet temperature T of the heating water outlet pipe of the wall-mounted boilerProductionWhether or not: t isProduction≤TMax against freezingWherein, TMaax prevents frostbiteThe maximum temperature threshold value of the wall-hanging furnace in the anti-freezing mode is set; if so, the burner is kept in a flameout state and is used for pumping water in the heating water return pipe back to the built-in water pump in the wall-mounted boiler to be started; if not, S4 is performed.
Preferably, the S4 further includes the following steps:
s4, judging whether the concentration C' of the harmful gas in the first time threshold meets the following conditions again when the wall-hanging furnace is in a safety protection state: c' is less than or equal to CThreshold value(ii) a If yes, go to S41; if not, the wall-mounted furnace enters a safety protection state;
s41, after the first time threshold value, judging whether the combustor reaches the condition of ignition combustion; if yes, igniting the burner for combustion, and returning to S1; if not, the wall-hanging stove is switched to a standby state.
Preferably, in S41, the condition that the burner achieves ignition combustion includes:
water outlet flow velocity V of water outlet pipe for wall-mounted boiler0And the water outlet temperature T of the water outlet pipe of the wall-mounted boilerGo outSatisfies the following conditions: v0≥VThreshold valueAnd T isGo out≤TThreshold valueIn which V isThreshold valueThreshold value of water flow rate T for user using domestic waterThreshold valueThe combustor is used for igniting and combusting the water for the outlet water temperature threshold value when the user uses the domestic water.
Preferably, in S41, the condition that the burner achieves ignition combustion includes:
water outlet temperature T of heating water outlet pipe of wall-mounted boilerProductionSatisfies the following conditions: t isProduction≤TTarget-TRecovery ofIn which T isTargetTo a preset heating temperature, TRecovery ofFor the return water temperature of hanging stove heating wet return, the combustor igniteed burning.
Preferably, in S41, the condition that the burner achieves ignition combustion includes:
water outlet temperature T of heating water outlet pipe of wall-mounted boilerProductionSatisfies the following conditions: t isProduction≤TMax against freezingIn which T isMax against freezingAnd the combustor is ignited to combust for the maximum temperature threshold value of the wall-mounted boiler in the anti-freezing mode.
Preferably, in S313, after the wall-hanging stove enters the anti-freezing mode, the method further includes the following steps:
s3131, judging the outlet water temperature T of the heating outlet pipe of the wall-mounted boilerProductionWhether or not: t isProduction＞TFrost protection 1Wherein, TFrost protection 1The minimum temperature threshold value of the wall-mounted boiler in a primary anti-freezing mode is set; if so, the wall-mounted furnace enters a first-stage anti-freezing mode, the combustor continues to maintain a flameout state, and the built-in water pump is started; if not, performing S3132;
s3132, judging the outlet water temperature T of the heating outlet pipeProductionWhether or not: t isProduction≤TFrost protection 1(ii) a If yes, the combustor maintains a flameout state, the built-in water pump maintains a stop state, and the wall-mounted boiler reports a fault; if not, S4 is performed.
Preferably, in S313, the method further includes the following steps:
s3132, judging the outlet water temperature T of the heating outlet pipeProductionWhether or not: t isAnti-freezing 2＜TProduction≤TFrost protection 1Wherein, TAnti-freezing 2The minimum temperature threshold value of the wall-hanging furnace in the secondary anti-freezing mode is set; if so, enabling the wall-mounted furnace to enter a secondary anti-freezing mode, maintaining the flameout state of the burner and starting the built-in water pump; if not, performing S3133;
s3133, judging the outlet water temperature T of the heating outlet pipeProductionWhether or not: t isProduction≤TAnti-freezing 2: if yes, the combustor maintains a flameout state, the built-in water pump maintains a stop state, and the wall-mounted boiler reports a fault; if not, S4 is performed.
Preferably, the harmful gas is CO or CH4。
Compared with the prior art, the invention adopting the scheme has the beneficial effects that:
the concentration C of harmful gas in the user room is detected, and the value of the concentration C of the harmful gas obtained through real-time detection is used as a judgment condition for judging whether the wall-mounted furnace enters a safety protection state, so that the problem that the concentration C of the harmful gas in the user room exceeds the standard can be effectively avoided;
after the concentration C of the harmful gas in the user room reaches a safe value, the wall-mounted furnace enters a safe protection state, namely the burner is flamed out, and the air inlet valve is closed, so that the concentration C of the harmful gas in the user room is prevented from being continuously increased from the source; meanwhile, the fan of the wall-mounted furnace continuously operates, so that the concentration C of harmful gas in the user room can be exhausted to the outside through the exhaust pipe of the wall-mounted furnace as soon as possible, the concentration C of the harmful gas in the user room is further reduced, and the use safety of the wall-mounted furnace is ensured.
Drawings
Fig. 1 is a first flowchart of a method for controlling a safety failure of a wall-hanging stove according to an embodiment of the present invention;
fig. 2 is a second flowchart of a method for controlling a safety failure of a wall-hanging stove according to an embodiment of the present invention;
fig. 3 is a third flowchart of a method for controlling a safety failure of a wall-hanging stove according to an embodiment of the present invention;
fig. 4 is a fourth flowchart of a method for controlling a safety failure of a wall-hanging stove according to an embodiment of the present invention;
fig. 5 is a fifth flowchart of a method for controlling a safety failure of a wall-hanging stove according to an embodiment of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment provides a method for controlling a safety fault of a wall-hanging stove, as shown in fig. 1, the method includes the following steps:
s1, combusting by using a combustor of the wall-hanging stove;
s2, detecting the concentration C of indoor harmful gas in real time;
s3, judging whether the concentration C of the harmful gas meets the following requirements: c is greater than CThreshold valueWherein, CThreshold valueIs a concentration threshold of the harmful gas within the chamber; if not, returning to S2; if yes, flameout of a burner of the wall-mounted furnace, closing of an air inlet valve and enabling the wall-mounted furnace to enter a safety protection state;
s4, detecting the concentration C' of the harmful gas in the room again in real time under the condition that the wall-mounted furnace is under the safety protection state; and judging whether the concentration C' of the harmful gas in the first time threshold meets the following conditions: c' is less than or equal to CThreshold value(ii) a If yes, switching the wall-mounted boiler from a safety protection state to a standby state after the first time threshold value; if not, the wall-mounted boiler continues to maintain the safety protection state.
If the concentration C of the harmful gas in the user room exceeds the safe concentration, the health and even life of the user are possibly harmed, so that the problem that the concentration C of the harmful gas in the user room exceeds the standard can be effectively avoided by detecting the concentration C of the harmful gas in the user room in real time and taking the value of the concentration C of the harmful gas obtained through real-time detection as a judgment condition whether the wall-mounted furnace enters the safe protection state or not; the room is a space where the wall-mounted stove is located, for example, the wall-mounted stove is usually installed in a kitchen of a user, so the room in the embodiment refers to the kitchen of the user.
After the concentration safety value of the harmful gas in the user room, the wall-mounted furnace enters a safety protection state, namely the burner stops burning, and the air inlet valve is closed, so that the concentration C of the harmful gas in the user room is prevented from being continuously increased from the source; meanwhile, as the fan of the wall-mounted furnace continuously operates, the concentration C of the harmful gas in the user room can be exhausted to the outside through the exhaust pipe of the wall-mounted furnace as soon as possible, and the concentration C of the harmful gas in the user room is further reduced.
In order to further ensure the safety of using the wall-mounted furnace, after the wall-mounted furnace enters the safety protection mode, a user can start the following processes by pressing a reset button on a control panel of the wall-mounted furnace: the wall-mounted furnace detects the concentration C' of the harmful gas in the room again in real time under the safety protection state; and judging whether the concentration C' of the harmful gas in the first time threshold meets the following conditions: c' is less than or equal to CThreshold value(ii) a If yes, after a first time threshold value, the wall-mounted boiler exits from the safety protection mode and is switched to a standby state; if not, the wall-mounted boiler continues to maintain the safety protection state, so that the following problems can be effectively avoided:
when the concentration C' of harmful gas in the user room is not reduced to be lower than a safety value, the wall-mounted furnace exits from a safety protection state under the operation of manual reset of a user, and further safety accidents are caused.
After the wall-mounted boiler enters the safety protection mode, the wall-mounted boiler can also automatically start the following processes: the wall-mounted furnace detects the concentration C' of the harmful gas in the room again in real time under the safety protection state; and judging whether the concentration C' of the harmful gas in the first time threshold meets the following conditions: c' is less than or equal to CThreshold value(ii) a If yes, after a first time threshold value, the wall-mounted boiler exits from the safety protection mode and is switched to a standby state; if not, the wall-mounted boiler continues to maintain the safety protection state.
In this embodiment, CThreshold valueThe concentration threshold value of the harmful gas in the room is the safe concentration value of the harmful gas in the room, namely the concentration of the harmful gas in the room obtained by detection is CThreshold valueThe following time, belonging to the safe state;
in this embodiment, the harmful gas is CO or CH4So when the harmful gas is CO, CThreshold valueRefers to the concentration threshold value of indoor CO, and the essence of the threshold value refers to the safe concentration value of indoor CO, namely the concentration of indoor CO detected to be CThreshold valueThe following time, belonging to the safe state;
when the harmful gas is CH4When, CThreshold valueRefer to the indoor CH4The concentration threshold of (2) essentially means indoor CH4The safe concentration value of (1), i.e. the indoor CH obtained when detected4At a concentration of CThreshold value 2Hereinafter, the state is a safe state.
In this embodiment, the first time threshold is a time value preset in advance in a controller of the wall-hanging stove, and is set to give the fan excessive harmful gas such as CO and/or CH in a room4The indoor time is exhausted, so that the wall-mounted furnace can be surely quitted from the safety protection mode after the first time threshold value is reached, and the problem of misjudgment is reduced.
For example, if there is no first time threshold, then because the concentration C 'of the harmful gas in the real-time detection room is greatly influenced by the external environment, for example, the air flow speed of the detection probe is fast, it may happen that the concentration C' of the harmful gas detected at a certain moment satisfies: c' is less than or equal to CThreshold valueHowever, in practice, the concentration C' of the harmful gas in the room does not reach the above condition, and if the wall-hanging stove exits from the safety protection state, when the user starts the wall-hanging stove again, the potential safety hazard may occur, and even the life of the user may be harmed.
In this embodiment, the first time threshold may be 10s or 20s, and the specific value is such that the concentration of the harmful gas in the chamber can be reduced to C within the first time thresholdThreshold valueThe following is the standard. For example, if the first time threshold is10s, but the concentration of harmful gas in the room cannot be reduced to C within 10sThreshold valueIn the following, the first time threshold needs to be increased, for example, 20 s.
In a particular embodiment of the present invention,
s3 further includes the steps of:
if yes, go to S31;
s31, extinguishing the burner, closing the air inlet valve and enabling the wall-mounted furnace to enter a safety protection state; judging whether the combustor reaches the condition of ignition combustion or not; if yes, the burner continues to maintain a flameout state; if not, S4 is performed.
Therefore, when the wall-mounted furnace is in a safety protection state, even if the combustor reaches the ignition combustion condition, the combustor can not ignite and combust, and the use safety of the wall-mounted furnace is further improved.
Because when hanging stove is in the safety protection state, if the combustor reaches the condition of ignition burning this moment, the combustor ignition burning, and the concentration of indoor harmful gas probably has not yet fallen below the safe value at this moment in fact, so the combustor ignition burning this moment can cause the potential safety hazard, even explode scheduling problem.
In a specific embodiment, as shown in fig. 2, S31 further includes the following steps:
s31, extinguishing the burner and closing the air inlet valve;
s311, judging the water outlet flow velocity V of the water outlet pipe of the wall-mounted boiler0And the outlet water temperature T of the water outlet pipe for the wall-mounted furnaceGo outWhether or not: v0≥VThreshold valueAnd T isGo out≤TThreshold valueWherein V isThreshold valueWater flow rate threshold, T, of water outlet pipe for consumer useThreshold valueThe water outlet temperature threshold of the water outlet pipe is used when the domestic water is used by a user; if yes, the burner maintains a flameout state, and cold water is discharged by a water outlet pipe; if not, go to S312;
s312, judging the outlet water temperature T of the heating outlet pipe of the wall-mounted boilerProductionWhether or not: t isProduction≤TTarget-TRecovery ofWherein, TTargetIs presetHeating temperature, TRecovery ofThe water return temperature of a heating water return pipe of the wall-mounted furnace is set; if so, the burner is kept in a flameout state and is used for pumping water in the heating water return pipe back to the built-in water pump in the wall-mounted boiler to be started; if not, performing S313;
s313, judging the water outlet temperature T of the heating water outlet pipe of the wall-mounted boilerProductionWhether or not: t isProduction≤TMax against freezingWherein, TMaax prevents frostbiteThe maximum temperature threshold value of the wall-mounted furnace in the anti-freezing mode is set; if so, the burner is kept in a flameout state and is used for pumping water in the heating water return pipe back to the built-in water pump in the wall-mounted boiler to be started; if not, S4 is performed.
In this embodiment, V0≥VThreshold valueAnd T isGo out≤TThreshold valueIs a condition when the user uses the domestic water, if V is satisfied0≥VThreshold valueAnd T isGo out≤TThreshold valueIf the concentration of harmful gas in the room does not fall below the safe value, the burner is ignited and combusted at the moment, so that the problems of potential safety hazard, even explosion and the like can be caused. Therefore, in the embodiment, the problems are effectively solved, and the wall-mounted boiler cannot be ignited and combusted even if a user needs domestic water when the wall-mounted boiler is in a safe protection state, so that the water obtained by the user is cold water.
In this embodiment, VThreshold valueAnd TThreshold valueAre all numerical values preset in advance in a control system of the wall-hanging stove. VThreshold valueMinimum discharge flow rate threshold for water discharge pipes for domestic water use, e.g. VThreshold valueCan be 2.5L/min; t isThreshold valueMinimum delivery temperature threshold of water outlet pipe for domestic water use by consumers, e.g. VThreshold valueMay be 15 deg.c.
In the present embodiment, TProduction≤TTarget-TRecovery ofIs the condition when heating is carried out, i.e. when TProduction≤TTarget-TRecovery ofTime, show that the wall-hanging stove needs ignition combustion. And if the combustor is not controlled at the moment, the combustor can ignite and burn, and actually, the concentration of harmful gas in the chamber may not be reduced below a safety value, so that the combustor ignites and burns at the moment, and potential safety hazards, even explosion and other problems can be caused. Therefore, in the embodiment, the problems are effectively solved, and the wall-mounted boiler is ensured not to ignite and burn even if the wall-mounted boiler is detected to meet the heating condition when the wall-mounted boiler is in the safety protection state.
In the present embodiment, TTargetAnd TRecovery ofAre all numerical values preset in advance in a control system of the wall-hanging stove. T isTargetFor example, the preset heating temperature may be a value temporarily preset by the control panel of the wall-hanging stove according to the needs of the user, and the preset value is stored in the control system of the wall-hanging stove and used as a precondition for judging whether the heating condition is satisfied, for example, in the embodiment, TTargetMay be 80 ℃; t isRecovery ofThe return water temperature of a heating return water pipe of the wall-mounted boiler is TRecovery ofThe temperature sensor is obtained by real-time detection of a temperature probe arranged in a heating water return pipe and fed back to a control system of the wall-mounted boiler to be used as a premise for judging whether the heating condition is met, for example, T in the embodimentRecovery ofMay be 15 deg.c.
In the present embodiment, TProduction≤TMax against freezingThe precondition that the wall-mounted furnace is switched into the anti-freezing mode is that only T is metProduction≤TMax against freezingIn time, the wall-mounted boiler can be automatically switched to the anti-freezing mode. After the existing wall-mounted furnace is switched into the anti-freezing mode, the combustor can ignite and burn, and actually, the concentration of harmful gas in the room at the moment can not be reduced below a safety value, so that the combustor ignites and burns at the moment, and potential safety hazards, even explosion and other problems can be caused. Therefore, in the embodiment, the problems are effectively solved, and the wall-mounted stove is ensured not to ignite and burn even if meeting the anti-freezing condition is detected when the wall-mounted stove is in the safety protection state.
In the present embodiment, TMaax prevents frostbiteIs a value preset in a control system of the wall-hanging stove. T isMaax prevents frostbiteIs a wall hangingThe maximum temperature threshold of the furnace in the anti-freezing mode is that the existing wall-mounted furnace has a critical temperature when T isProductionWhen the temperature is lower than the critical temperature, the wall-mounted boiler can be automatically switched into an anti-freezing mode, so that the wall-mounted boiler is effectively prevented from being frozen; when T isProductionAbove the critical temperature, the wall-mounted boiler cannot be switched to the anti-freezing mode, which indicates that the wall-mounted boiler does not have the risk of being frozen. And T in the present embodimentMaax prevents frostbiteThis is the critical temperature value, which may be 8 ℃ or 5 ℃, for example.
Through foretell judgement, can ensure when hanging stove is in the safety protection state, even detect the condition, the heating condition or the condition of preventing frostbite that satisfy domestic water, hanging stove can not light a fire the burning yet, and the effectual potential safety hazard of avoiding improves the security of hanging stove.
In a specific embodiment, as shown in fig. 3 and 4, S4 further includes the following steps:
s4, judging whether the concentration C' of the harmful gas in the first time threshold meets the following conditions again when the wall-hanging furnace is in a safety protection state: c' is less than or equal to CThreshold value(ii) a If yes, go to S41; if not, the wall-mounted furnace enters a safety protection state;
s41, after the first time threshold value, judging whether the combustor reaches the condition of ignition combustion; if yes, cleaning before starting the fan, igniting and burning the burner, and returning to S1; if not, the fan is started and then cleaned, and the wall-mounted boiler is switched to a standby state.
Determining whether the burner meets the condition of ignition combustion after the first time threshold value again to determine that the temperature is less than or equal to CThreshold valueWhen the wall-mounted boiler meets the condition of exiting from the safety protection state, whether a user has the requirement of domestic water, whether the user has the requirement of heating or whether the user has the requirement of preventing freezing or not, if at least one of the requirements exists, the burner is ignited and combusted to form seamless connection, and the wall-mounted boiler is more automatic and intelligent; if the requirement is not met, the wall-mounted boiler directly enters a standby state.
The purpose of cleaning before and after the fan is started is to discharge all the waste gas in the waste gas pipe out of the room.
In an embodiment, the conditions for the burner to reach the ignited combustion in S41 include:
water outlet flow velocity V of water outlet pipe for wall-mounted boiler0And the outlet water temperature T of the water outlet pipe for the wall-mounted furnaceGo outSatisfies the following conditions: v0≥VThreshold valueAnd T isGo out≤TThreshold valueIn which V isThreshold valueThreshold value of water flow rate T for user using domestic waterThreshold valueThe combustor ignites and burns for the outlet water temperature threshold value when the user uses the domestic water.
V0≥VThreshold valueAnd T isGo out≤TThreshold valueThe wall-mounted boiler is a condition that a user has the requirement of domestic water, when the condition is met, the wall-mounted boiler is automatically switched into a domestic water mode, and the combustor ignites and burns.
In an embodiment, the conditions for the burner to reach the ignited combustion in S41 include:
water outlet temperature T of heating water outlet pipe of wall-mounted boilerProductionSatisfies the following conditions: t isProduction≤TTarget-TRecovery ofIn which T isTargetTo a preset heating temperature, TRecovery ofAnd the combustor ignites and burns for the return water temperature of the heating return water pipe of the wall-mounted furnace.
TProduction≤TTarget-TRecovery ofWhen the condition is met, the condition indicates that a user has the heating requirement, the wall-mounted boiler is switched to the heating mode, and the burner is ignited to burn.
In an embodiment, the conditions for the burner to reach the ignited combustion in S41 include:
water outlet temperature T of heating water outlet pipe of wall-mounted boilerProductionSatisfies the following conditions: t isProduction≤TMax against freezingIn which T isMax against freezingThe burner is used for igniting and burning the wall-mounted furnace at the maximum temperature threshold value in the anti-freezing mode.
TProduction≤TMax against freezingThe wall-mounted boiler needs to be prevented from freezing, and when the conditions are met, the wall-mounted boiler enters an anti-freezing modeAnd the combustor ignites and burns, so that the pipeline is effectively prevented from being frozen.
In a specific embodiment, in S313, after the wall-hanging stove enters the anti-freezing mode, the method further includes the following steps:
s3131, judging the outlet water temperature T of the heating outlet pipe of the wall-mounted boilerProductionWhether or not: t isProduction＞TFrost protection 1Wherein, TFrost protection 1The minimum temperature threshold value of the wall-mounted furnace in the first-stage anti-freezing mode is set; if so, the wall-mounted boiler enters a primary anti-freezing mode, logic operation of the primary anti-freezing mode is executed, the combustor continues to maintain a flameout state, and the built-in water pump is started; if not, performing S3132;
s3132, judging the outlet water temperature T of the heating outlet pipeProductionWhether or not: t isProduction≤TFrost protection 1(ii) a If yes, the combustor maintains a flameout state, the built-in water pump maintains a stop state, and the wall-mounted boiler reports a fault; if not, S4 is performed.
The existing wall-mounted boiler has a two-stage antifreezing mode and a three-stage antifreezing mode; when the wall-mounted boiler is in the second-stage anti-freezing mode, after the wall-mounted boiler is switched to the anti-freezing mode, the wall-mounted boiler needs to be further judged to belong to which one stage of anti-freezing mode, so that the combustor can not ignite and burn no matter which one stage of anti-freezing mode is, and the use safety of the wall-mounted boiler is ensured.
In this embodiment, the wall-hanging stove of this embodiment is in the two-stage anti-freezing mode, so TMaax prevents frostbiteAnd TFrost protection 1The relationship between them is: t isMaax prevents frostbite＞TFrost protection 1(ii) a When T isFrost protection 1＜TProduction≤TMaax prevents frostbiteWhen the wall-mounted boiler enters a first-stage anti-freezing mode; when T isProduction≤TFrost protection 1And the wall-mounted boiler enters a secondary anti-freezing mode, and the wall-mounted boiler reports a fault to remind a user of solving the anti-freezing problem.
E.g. TMaax prevents frostbiteCan be 8 ℃ and TFrost protection 1May be 5 deg.c.
The control method can ensure that the combustor can not ignite and burn no matter which stage of anti-freezing mode the wall-mounted furnace is in when the wall-mounted furnace is in the safety protection state, so that the use safety of the wall-mounted furnace is improved.
In a specific embodiment, as shown in fig. 5, in S313, after the wall-hanging stove enters the anti-freezing mode, the method further includes the following steps:
s3131, judging the outlet water temperature T of the heating outlet pipe of the wall-mounted boilerProductionWhether or not: t isProduction＞TFrost protection 1Wherein, TFrost protection 1The minimum temperature threshold value of the wall-mounted furnace in the first-stage anti-freezing mode is set; if so, the wall-mounted boiler enters a primary anti-freezing mode, logic operation of the primary anti-freezing mode is executed, the combustor maintains a flameout state, and the built-in water pump is started; if not, performing S3132;
s3132, judging the outlet water temperature T of the heating outlet pipeProductionWhether or not: t isAnti-freezing 2＜TProduction≤TFrost protection 1Wherein, TAnti-freezing 2The minimum temperature threshold value of the wall-mounted furnace in the secondary anti-freezing mode is set; if so, the wall-mounted boiler enters a secondary anti-freezing mode, logic operation of the secondary anti-freezing mode is executed, the combustor maintains a flameout state, and the built-in water pump is started; if not, performing S3133;
s3133, judging the outlet water temperature T of the heating outlet pipeProductionWhether or not: t isProduction≤TAnti-freezing 2: if yes, the burner is kept in a flameout state, the built-in water pump is kept in a stop state, and the wall-mounted boiler reports faults; if not, S4 is performed.
The existing wall-mounted boiler has a two-stage antifreezing mode and a three-stage antifreezing mode; when the hanging stove is the tertiary mode of preventing frostbite, after the hanging stove switches into the mode of preventing frostbite, just need further judgement to belong to the mode of preventing frostbite of which one-level, ensure no matter under the mode of preventing frostbite of which one-level, the combustor can not ignite the burning, ensure hanging stove safe in utilization.
In this embodiment, the wall-hanging stove of this embodiment is in the three-level anti-freezing mode, so TMaax prevents frostbite、TFrost protection 1And TAnti-freezing 2The relationship between them is: t isMaax prevents frostbite＞TFrost protection 1＞TAnti-freezing 2(ii) a When T isFrost protection 1＜TProduction≤TMaax prevents frostbiteMeanwhile, the wall-mounted boiler enters a first-stage anti-freezing mode(ii) a When T isAnti-freezing 2＜TProduction≤TFrost protection 1Meanwhile, the wall-mounted boiler enters a secondary anti-freezing mode; when T isProduction≤TAnti-freezing 2And the wall-mounted boiler enters a three-stage anti-freezing mode, and the wall-mounted boiler reports a fault and reminds a user to solve the anti-freezing problem. E.g. TMaax prevents frostbiteCan be 8 ℃ and TFrost protection 1May be at 5 ℃ TAnti-freezing 2May be 1 ℃.
The control method can ensure that the combustor can not ignite and burn no matter which stage of anti-freezing mode the wall-mounted furnace is in when the wall-mounted furnace is in the safety protection state, so that the use safety of the wall-mounted furnace is improved.
This embodiment first judges whether the concentration C of the harmful gas satisfies: c is greater than CThreshold valueIf yes, the burner is flamed out, the air inlet valve is closed, the fan continues to operate, and the wall-mounted furnace enters a safety protection state at the moment;
then, after entering the safety protection state, in order to avoid that when the burner reaches the ignition combustion condition, namely the user has domestic water requirements, or the user has heating requirements, or the wall-mounted boiler has anti-freezing requirements, the burner ignites and combusts, the flameout state of the burner is further maintained, and the use safety of the burner is further improved;
secondly, judging whether the concentration C' of harmful gas meets the following requirements in a first time threshold value: c' is less than or equal to CThreshold valueThe following problems are effectively avoided: when the concentration C' of harmful gas in the user room is not reduced to be lower than a safety value, the wall-mounted furnace exits from a safety protection state under the operation of manual reset of a user, so that safety accidents are caused, and the use safety of the wall-mounted furnace is further improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A method for controlling the safety fault of a wall-hanging stove is characterized by comprising the following steps:
s1, combusting by using a combustor of the wall-hanging stove;
s2, detecting the concentration C of indoor harmful gas in real time;
s3, judging whether the concentration C of the harmful gas meets the following requirements: c is greater than CThreshold valueWherein, CThreshold valueIs a concentration threshold of the harmful gas within the chamber; if not, returning to S2; if yes, go to S31;
s31, extinguishing the burner and closing an air inlet valve;
s311, judging the water outlet flow velocity V of the water outlet pipe of the wall-mounted boiler0And the water outlet temperature T of the water outlet pipe of the wall-mounted boilerGo outWhether or not: v0≥VThreshold valueAnd T isGo out≤TThreshold valueWherein V isThreshold valueThe water outlet flow speed threshold value T of the water outlet pipe is used for users to use domestic waterThreshold valueThe water outlet temperature threshold of the water outlet pipe is set when the domestic water is used by a user; if yes, the burner is kept in a flameout state, and the water outlet pipe discharges cold water; if not, go to S312;
s312, judging the outlet water temperature T of the heating outlet pipe of the wall-mounted boilerProductionWhether or not: t isProduction≤T Target-TRecovery ofWherein, TTargetTo a preset heating temperature, TRecovery ofThe water return temperature of the heating water return pipe of the wall-mounted furnace is the water return temperature of the heating water return pipe of the wall-mounted furnace; if so, the burner is kept in a flameout state and is used for pumping water in the heating water return pipe back to the built-in water pump in the wall-mounted boiler to be started; if not, performing S313;
s313, judging the water outlet temperature T of the heating water outlet pipe of the wall-mounted boilerProductionWhether or not: t isProduction≤T Max against freezingWherein, TMax against freezingThe maximum temperature threshold value of the wall-hanging furnace in the anti-freezing mode is set; if so, the burner is kept in a flameout state and is used for pumping water in the heating water return pipe back to the built-in water pump in the wall-mounted boiler to be started;if not, go to S4;
s4, detecting the concentration C' of the harmful gas in the room again in real time under the condition that the wall-mounted furnace is under the safety protection state; and judging whether the concentration C' of the harmful gas in the first time threshold meets the following conditions: c' is less than or equal to CThreshold value(ii) a If yes, switching the wall-mounted boiler from a safety protection state to a standby state after the first time threshold value; if not, the wall-mounted boiler continues to maintain the safety protection state.
2. The wall-hanging stove safety fault control method as claimed in claim 1, wherein the S4 further comprises the steps of:
s4, judging whether the concentration C' of the harmful gas in the first time threshold meets the following conditions again when the wall-hanging furnace is in a safety protection state: c' is less than or equal to CThreshold value(ii) a If yes, go to S41; if not, the wall-mounted furnace enters a safety protection state;
s41, after the first time threshold value, judging whether the combustor reaches the condition of ignition combustion; if yes, igniting the burner for combustion, and returning to S1; if not, the wall-hanging stove is switched to a standby state.
3. The wall-hanging stove safety fault control method as claimed in claim 2, wherein in S41, the condition that the burner reaches ignition combustion includes:
water outlet flow velocity V of water outlet pipe for wall-mounted boiler0And the water outlet temperature T of the water outlet pipe of the wall-mounted boilerGo outSatisfies the following conditions: v0≥VThreshold valueAnd T isGo out≤TThreshold valueIn which V isThreshold valueThreshold value of water flow rate T for user using domestic waterThreshold valueThe combustor is used for igniting and combusting the water for the outlet water temperature threshold value when the user uses the domestic water.
4. The wall-hanging stove safety fault control method as claimed in claim 2, wherein in S41, the condition that the burner reaches ignition combustion includes:
water outlet temperature T of heating water outlet pipe of wall-mounted boilerProductionSatisfies the following conditions: t isProduction≤TTarget-TRecovery ofIn which T isTargetTo a preset heating temperature, TRecovery ofFor the return water temperature of hanging stove heating wet return, the combustor igniteed burning.
5. The wall-hanging stove safety fault control method as claimed in claim 2, wherein in S41, the condition that the burner reaches ignition combustion includes:
water outlet temperature T of heating water outlet pipe of wall-mounted boilerProductionSatisfies the following conditions: t isProduction≤TMax against freezingIn which T isMax against freezingAnd the combustor is ignited to combust for the maximum temperature threshold value of the wall-mounted boiler in the anti-freezing mode.
6. The method for controlling the safety fault of the wall-hanging stove according to claim 1, wherein in S313, after the wall-hanging stove enters the anti-freezing mode, the method further comprises the following steps:
s3131, judging the outlet water temperature T of the heating outlet pipe of the wall-mounted boilerProductionWhether or not: t isProduction＞T Frost protection 1Wherein, TFrost protection 1The minimum temperature threshold value of the wall-mounted boiler in a primary anti-freezing mode is set; if so, the wall-mounted furnace enters a first-stage anti-freezing mode, the combustor continues to maintain a flameout state, and the built-in water pump is started; if not, performing S3132;
s3132, judging the outlet water temperature T of the heating outlet pipeProductionWhether or not: t isProduction≤TFrost protection 1(ii) a If yes, the combustor maintains a flameout state, the built-in water pump maintains a stop state, and the wall-mounted boiler reports a fault; if not, S4 is performed.
7. The method for controlling a safety failure of a wall-hanging stove according to claim 6, wherein in S313, the method further comprises the steps of:
S3132、judging the outlet water temperature T of the heating outlet pipeProductionWhether or not: t isAnti-freezing 2＜TProduction≤TFrost protection 1Wherein, TAnti-freezing 2The minimum temperature threshold value of the wall-hanging furnace in the secondary anti-freezing mode is set; if so, enabling the wall-mounted furnace to enter a secondary anti-freezing mode, maintaining the flameout state of the burner and starting the built-in water pump; if not, performing S3133;
s3133, judging the outlet water temperature T of the heating outlet pipeProductionWhether or not: t isProduction≤TAnti-freezing 2: if yes, the combustor maintains a flameout state, the built-in water pump maintains a stop state, and the wall-mounted boiler reports a fault; if not, S4 is performed.
8. The method for controlling the safety fault of the wall-hanging stove according to claim 1, wherein the harmful gas is CO or CH4。
CN201910977833.6A 2019-10-15 2019-10-15 Wall-mounted boiler safety fault control method Active CN110822720B (en)

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CN111365852A (en) * 2020-03-02 2020-07-03 华帝股份有限公司 Automatic anti-freezing method for water heater and anti-freezing water heater

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CN2203766Y (en) * 1994-04-18 1995-07-19 赵金宝 Automatic cut-off device for overproof CO of gas water-heater
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