CN112254353A - Water heater fan control method, device and equipment and water heater - Google Patents
Water heater fan control method, device and equipment and water heater Download PDFInfo
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- CN112254353A CN112254353A CN202011117277.4A CN202011117277A CN112254353A CN 112254353 A CN112254353 A CN 112254353A CN 202011117277 A CN202011117277 A CN 202011117277A CN 112254353 A CN112254353 A CN 112254353A
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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
Abstract
The application relates to a water heater fan control method, device and equipment and a water heater. The method comprises the following steps: after the real-time rotating speed of the fan of the water heater in the running process is obtained, the variable quantity of the real-time rotating speed in a preset time period is calculated, and when the real-time rotating speed is judged to be reduced according to the variable quantity, the input voltage transmitted to the fan is increased until the real-time rotating speed meets the preset normal running condition. In the normal combustion process of water heater, when external factors lead to the outlet flue to block up or have the strong wind to blow off the outlet flue, will change the interior wind pressure value of chimney, cause the windage to increase, the fan reduces in the unchangeable circumstances speed of input voltage, increase the input voltage who transmits to the fan this moment, the input voltage increases and will promote the fan rotational speed, the increment of windage has been fallen in the rotational speed balance that the fan increases, cause furnace to maintain stable burning operating mode, a series of problems that avoid burning unbalance to cause, thereby the use reliability of water heater has been improved.
Description
Technical Field
The application relates to the technical field of household appliances, in particular to a water heater fan control method, device and equipment and a water heater.
Background
The water heater is a widely used household appliance, and the temperature of cold water is increased to be changed into hot water for users to use within a certain time through various physical principles, so that the convenience of daily life of the users is improved.
The fan is a core component of the water heater, in the traditional water heater, the rotating speed of the fan is generally maintained to be fixed and is not changed due to the change of power, external conditions and the like, so that when the external environment changes, for example, when strong wind occurs in the environment in the using process, the rotating speed of the fan is maintained to be unchanged, negative pressure in a hearth is reduced, the proportion of air and oxygen in a combustion chamber is abnormal, and a series of problems of combustion unbalance, reduction of heat efficiency, over-standard smoke, imbalance of constant temperature performance and the like are caused, and the traditional water heater is low in use reliability.
Disclosure of Invention
The invention provides a water heater fan control method, a device, equipment and a water heater aiming at the problem of low use reliability of the traditional water heater.
A water heater fan control method comprises the following steps:
acquiring the real-time rotating speed of a fan of a water heater in the running process;
calculating the variation of the real-time rotating speed in a preset time period;
and when the real-time rotating speed is judged to be reduced according to the variable quantity, increasing the input voltage transmitted to the fan.
A water heater fan control device comprising:
the rotating speed acquisition module is used for acquiring the real-time rotating speed of the fan of the water heater in the running process;
the rotating speed calculating module is used for calculating the variable quantity of the real-time rotating speed in a preset time period;
and the boosting module is used for increasing the input voltage transmitted to the fan when the real-time rotating speed is judged to be reduced according to the variable quantity.
The water heater fan control device comprises a controller and a fan, wherein the controller is connected with the fan, the fan is used for feeding back real-time rotating speed to the controller, and the controller is used for controlling the water heater fan according to the method.
In one embodiment, the water heater fan control device further comprises an information prompting device, and the information prompting device is connected with the controller.
A water heater comprises the water heater fan control device.
According to the water heater fan control method, the device and the equipment and the water heater, after the real-time rotating speed of the fan of the water heater in the operation process is obtained, the variation of the real-time rotating speed in a preset time period is calculated, and when the real-time rotating speed is judged to be reduced according to the variation, the input voltage transmitted to the fan is increased until the real-time rotating speed meets the preset normal operation condition. In the normal combustion process of water heater, when external factors lead to the outlet flue to block up or have the strong wind to blow off the outlet flue, will change the interior wind pressure value of chimney, cause the windage to increase, the fan reduces in the unchangeable circumstances speed of input voltage, increase the input voltage who transmits to the fan this moment, the input voltage increases and will promote the fan rotational speed, the increment of windage has been fallen in the rotational speed balance that the fan increases, cause furnace to maintain stable burning operating mode, a series of problems that avoid burning unbalance to cause, thereby the use reliability of water heater has been improved.
In one embodiment, the obtaining the real-time rotation speed of the fan of the water heater during the operation process includes:
detecting the real-time rotation frequency of the fan in the running process;
and calculating the real-time rotating speed of the fan in the running process according to the real-time rotating frequency.
In one embodiment, after calculating the variation of the real-time rotation speed in a preset time period, the method further includes:
and when the real-time rotating speed is judged to be increased according to the variable quantity, reducing the input voltage transmitted to the fan.
In one embodiment, the method further includes, after increasing the input voltage transmitted to the fan when the real-time rotation speed is determined to decrease according to the variation, or after decreasing the input voltage transmitted to the fan when the real-time rotation speed is determined to increase according to the variation, the method further includes:
and when the real-time rotating speed meets the preset normal operation condition, stopping changing and increasing the input voltage transmitted to the fan.
In one embodiment, after stopping changing and increasing the input voltage transmitted to the fan when the real-time rotation speed satisfies the preset normal operation condition, the method further includes:
detecting whether the real-time rotating speed and the input current transmitted to the fan meet a preset adaptation interval or not;
if yes, returning to the step of acquiring the real-time rotating speed of the fan of the water heater in the running process;
if not, returning to the step of increasing the input voltage transmitted to the fan when the real-time rotating speed is judged to be reduced according to the variable quantity.
In one embodiment, the method further includes, after increasing the input voltage transmitted to the fan when the real-time rotation speed is determined to decrease according to the variation, or after decreasing the input voltage transmitted to the fan when the real-time rotation speed is determined to increase according to the variation, the method further includes:
and when the real-time rotating speed does not meet the preset normal operation condition, sending a reminding instruction to an information reminding device.
In one embodiment, the real-time rotation speed meeting the preset normal operation condition includes: the real-time rotating speed is greater than a preset rotating speed lower limit value and less than or equal to a preset rotating speed upper limit value.
Drawings
FIG. 1 is a flow chart of a water heater fan control method in one embodiment;
FIG. 2 is a flow chart of a water heater fan control method in another embodiment;
FIG. 3 is a flow chart of a water heater blower control method in yet another embodiment;
FIG. 4 is a flow chart of a water heater fan control method in yet another embodiment;
FIG. 5 is a schematic structural view of a fan in one embodiment;
FIG. 6 is a schematic diagram of the mechanism of the water heater in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described more fully below by way of examples in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In one embodiment, please refer to fig. 1, a method for controlling a fan of a water heater is provided, which mainly controls the fan of the water heater. Specifically, the fan is a key device for the operation of the water heater, and is generally a direct current fan, and in the following embodiments, the direct current fan is also exemplified, and the structural diagram of the direct current fan can be seen in fig. 5. Direct current fan adopts direct current drive, can carry out before the ignition of water heater and clean before the furnace, prevents to take place the detonation, relies on self draft to provide the negative pressure to furnace in the normal operating, causes the air convection, makes the gas can normally burn, and after flame-out, the fan can carry out the back and clean, clears away tail gas in the furnace. The fan control method of the water heater can be executed through the controller, the controller can adopt a controller already arranged on the water heater, corresponding functions are added on the basis of the original controller, so that the hardware cost of the water heater is reduced, the fan control method can also be an independent controller additionally arranged, different functions can be executed by different controllers, mutual interference among control flows is avoided, the control accuracy of the water heater control method is improved, and the fan control method can be specifically selected according to actual requirements. The water heater fan control method comprises the following steps:
step S200: and acquiring the real-time rotating speed of the fan of the water heater in the running process.
The water heater fan control method is performed under the condition that the water heater is in an operating state, and it is understood that a step of starting the operation of the water heater should be included before the step S200. The water heater is started and operated, so that the water heater can be started by one key according to a preset switch key after the power supply of the water heater is switched on, and the water heater can also be started in other modes, which is not limited herein.
The step of acquiring the real-time rotating speed of the fan of the water heater in the running process can be realized through the controller, and the controller and the direct current fan can transmit signals, so that the controller can normally acquire the rotating speed of the direct current fan. The mode that controller and fan realized signal transmission is not exclusive, and for example, the controller accessible signal line is connected with the fan, realizes signal transmission through the signal line, can improve the stability of transmission signal, and with low costs, realizes simply. Specifically, the number of the signal lines is not unique, and in this embodiment, the number of the signal lines is four, two of the signal lines are used for feeding back signals to the controller by the dc fan, for example, feeding back signals related to the real-time rotating speed of the fan, and the other two signal lines are used for transmitting signals to the dc fan by the controller, so that signals in different transmission directions and different types of signals can be transmitted through different signal lines, thereby avoiding mutual interference of the transmission signals and improving the accuracy of the transmission signals. It is understood that in other embodiments, the number of signal lines may be other, as long as one skilled in the art can realize the signal lines.
After the water heater leaves a factory, when the water heater is used at home of a user for the first time, the rotating speed of the direct current fan can be determined according to the rated power of the water heater. And after the rotating speed of the water heater during starting is determined, the controller controls the direct current fan of the water heater to operate according to the obtained rotating speed. In the subsequent operation process of the water heater, the controller continuously acquires the real-time rotating speed of the fan of the water heater in the operation process so as to realize the real-time monitoring of the real-time rotating speed of the direct current fan, when the real-time rotating speed is abnormal, the real-time monitoring is convenient to process in time, the combustion performance of the water heater is prevented from being influenced, and the reliable operation of the water heater is guaranteed. It can be understood that the water heater can also obtain the real-time rotating speed of the water heater in the running process of the fan according to the preset time interval, for example, when the working environment of the water heater is stable and the estimated rotating speed of the fan of the water heater cannot change greatly, the real-time rotating speed of the water heater in the running process of the fan can be obtained according to the preset time interval, so that the working load of the controller is reduced.
Step S400: and calculating the variable quantity of the real-time rotating speed in a preset time period.
In the running process of the water heater, the real-time rotating speed of the direct current fan may change due to the influence of the external environment or the state of the device per se. For example, in the use process of a water heater, when strong wind blows out a smoke outlet or a flue is blocked in the environment, the wind pressure value in the flue of the water heater is affected, the wind resistance is changed, and the rotating speed of the direct current fan is changed. By monitoring the change condition of the real-time rotating speed, the environmental state and the self working state of the water heater can be known, and a basis is provided for the follow-up control of the direct current fan.
The mode of monitoring the change condition of the real-time rotating speed of the direct current fan is not unique, and in this embodiment, the change condition of the real-time rotating speed of the direct current fan is monitored by calculating the variation of the real-time rotating speed in a preset time period. It can be understood that the number of the real-time rotating speeds acquired by the controller is not unique, and at different time points, the controller can acquire the real-time rotating speed of the direct current fan corresponding to the current time point. The preset time period comprises more than two time points, and the variation of the real-time rotating speed in the preset time period can be obtained according to the obtained multiple real-time rotating speeds and the real-time rotating speeds corresponding to the first and last time points. The specific value of the preset time period is not unique and can be selected according to actual requirements, the preset time period is generally a period of time in the continuous operation process of the water heater, and the preset time period is generally not too long so as to avoid the condition that the change of the rotating speed of the direct current fan caused by the external environment cannot be truly reflected. The type of the variation is not unique, and may be, for example, a difference or a ratio of the real-time rotation speeds corresponding to the first and last time points, as long as the variation trend of the real-time rotation speed can be reflected. The variable quantity is used as an evaluation index for monitoring the change condition of the real-time rotating speed, the calculation is simple, the change condition of the real-time rotating speed can be reflected obviously, and the use is convenient.
Step S600: and when the real-time rotating speed is judged to be reduced according to the variable quantity, increasing the input voltage transmitted to the fan.
The variation is used as an evaluation index for monitoring the variation condition of the real-time rotating speed, and the variation trend of the real-time rotating speed of the direct current fan of the water heater can be obviously reflected. According to different types of the variable quantity, the mode for judging the real-time rotating speed of the direct current fan is different. For example, when the variation is a difference between the real-time rotation speed corresponding to the last time point and the real-time rotation speed corresponding to the first time point in the preset time period, if the difference is less than 0, it may be determined that the rotation speed of the dc fan decreases in the time period. When the variation is the ratio of the real-time rotating speed corresponding to the last moment point to the real-time rotating speed corresponding to the first moment point in the preset time period, if the difference is less than 1, the rotating speed of the direct current fan can be judged to be reduced in the time period. The factors causing the real-time rotating speed reduction of the direct current fan are various, for example, when an external factor causes the blockage of a smoke outlet or strong wind blows out the smoke outlet, the wind pressure value in the smoke pipe is changed, the wind resistance is increased, and the rotating speed of the fan is reduced under the condition that the input voltage is not changed.
When the real-time rotating speed of the direct current fan is monitored to be reduced, the controller increases the input voltage to the fan according to the rotating speed signal, the rotating speed of the fan is increased by increasing the input voltage, the fan is used for resisting flue air pressure unbalance caused by external condition change, and the increment of wind resistance is balanced by the increased rotating speed of the fan, so that a hearth maintains a stable combustion working condition, the combustion performance of the water heater is improved, and the normal operation of the water heater is facilitated. Further, the amplitude of the increased voltage transmitted to the fan may be determined according to the variation of the real-time rotation speed, for example, when the variation of the real-time rotation speed of the dc fan is large, the amplitude of the increased voltage value is large, and when the variation of the real-time rotation speed of the dc fan is small, the amplitude of the increased voltage value is small, so as to adjust the rotation speed of the dc fan as required, and improve the working performance of the dc fan.
In one embodiment, referring to fig. 2, step S200 includes step S210 and step S220.
Step S210: and detecting the real-time rotation frequency of the fan in the running process.
The mode of obtaining the real-time rotating speed of the water heater in the running process of the fan is not unique, and in the embodiment, the controller firstly obtains the real-time rotating frequency of the fan in the running process and then calculates the real-time rotating speed according to the obtained real-time rotating frequency. The mode that the controller detects real-time rotational frequency is also not unique, and generally speaking, fan converter, the inherent frequency detection terminal of fan can transmit the frequency in the direct current fan running process promptly real-time rotational frequency to the controller, makes the controller accomplish the detection to real-time rotational frequency.
Step S220: and calculating the real-time rotating speed of the fan in the running process according to the real-time rotating frequency.
And after the real-time rotation frequency is obtained, the controller calculates the real-time rotation speed of the fan in the running process according to the characteristics of the frequency converter and the real-time rotation frequency. The frequency is an electrical signal and the controller can convert the frequency to a fan speed. The method for calculating the real-time rotating speed of the fan in the running process according to the real-time rotating frequency is not unique, and the calculating method is different according to different characteristics of each fan, for example, the frequency of a certain fan is 500, the controller needs to convert the frequency into the fan rotating speed, and the rotating speed of the fan is 3750r/min after 500 × 7.5 is required to be converted into 3750r/min, so that the rotating speed of the fan is 3750 r/min. It is understood that in other embodiments, the real-time rotation speed of the dc fan during the operation process may be calculated in other manners, as long as the calculation is realized by those skilled in the art.
In one embodiment, referring to fig. 2, after step S400, the method for controlling a fan of a water heater further includes step S500.
Step S500: and when the real-time rotating speed is judged to be increased according to the variable quantity, reducing the input voltage transmitted to the fan.
When judging real-time rotational speed according to the variation, the fan rotational speed is big, and the controller reduces the input voltage to the fan this moment, reduces the fan rotational speed, avoids causing the emergence of furnace from the flame condition because of the fan rotational speed is too big. The hearth is away from the flame combustion, which shows that the rotating speed of the fan is too large, the flame is extracted, the combustion is in an abnormal state, the combustion is insufficient, and a large amount of heat is extracted to avoid heat exchange of the heat exchanger.
The variation is used as an evaluation index for monitoring the variation condition of the real-time rotating speed, and the variation trend of the real-time rotating speed of the direct current fan of the water heater can be obviously reflected. According to different types of the variable quantity, the mode for judging the real-time rotating speed of the direct current fan is different. For example, when the variation is a difference between the real-time rotation speed corresponding to the last time point and the real-time rotation speed corresponding to the first time point in the preset time period, if the difference is greater than 0, it may be determined that the rotation speed of the dc fan increases in the time period. When the variation is the ratio of the real-time rotating speed corresponding to the last moment point to the real-time rotating speed corresponding to the first moment point in the preset time period, if the difference is greater than 1, the rotating speed of the direct current fan can be judged to rise in the time period. The factors causing the real-time rotating speed of the direct current fan to increase are various, when the water heater is in a wind-resistant state, when the external factors causing the increase of the wind resistance are eliminated, the wind pressure in the smoke pipe is reduced, the wind resistance is reduced, and the rotating speed of the fan is increased under the condition that the input voltage is not changed.
When the real-time rotating speed of the direct current fan is monitored to be increased, the controller reduces the input voltage to the fan according to the rotating speed signal, the rotating speed of the fan is reduced due to the reduction of the input voltage, the reduction of the wind resistance is balanced by the reduced rotating speed of the fan, and the stable combustion working condition of the hearth is maintained, so that the combustion performance of the water heater is improved, and the normal operation of the water heater is facilitated. Further, the amplitude of the reduced voltage transmitted to the fan may be determined according to the variation of the real-time rotation speed, for example, when the variation of the real-time rotation speed of the dc fan is large, the amplitude of the reduced voltage value is large, and when the variation of the real-time rotation speed of the dc fan is small, the amplitude of the reduced voltage value is small, so as to adjust the rotation speed of the dc fan as required, and improve the working performance of the dc fan.
In one embodiment, referring to fig. 2, after step S500, or after step S600, the water heater fan control method further includes step S710.
Step S710: and when the real-time rotating speed meets the preset normal operation condition, stopping changing the input voltage transmitted to the fan.
After the rotating speed of the fan is adjusted, the rotating speed of the adjusted fan is continuously obtained, if the adjusted rotating speed of the fan meets the preset normal operation condition, the normal combustion of the water heater under the current rotating speed is considered, hot water meeting the user requirement is supplied, then the change of the input voltage transmitted to the fan can be stopped at the moment, and the rotating speed of the fan does not need to be adjusted. When step S700 follows step S500, stopping changing the input voltage transmitted to the fan, in particular stopping decreasing the input voltage transmitted to the fan, and when step S700 follows step S600, stopping changing the input voltage transmitted to the fan, in particular stopping increasing the input voltage transmitted to the fan. The preset normal operation condition is not unique, can be adjusted according to actual conditions or user requirements and the like, and generally only needs to represent the normal working state of the water heater.
In one embodiment, referring to fig. 3, after step S710, the method for controlling a fan of a water heater further includes step S810.
Step S810: and detecting whether the real-time rotating speed and the input current transmitted to the fan meet a preset adaptation interval.
If yes, returning to the step S200; if not, the process returns to step S600. The preset adaptation interval is not fixed, the frequency signal and the current signal of the fan need to be subjected to interval matching in the early period according to the model selection and the power difference of the water heater, and the fan frequency and current matching intervals of different power sections and different windage resistances meet the conditions that the water heater can normally burn, and smoke discharged by unit combustion meets the national standard and the like. The interval corresponding relation between the frequency signal and the current signal is a mathematical model, the interval relation can be changed by the electric signal of each fan, the wind pressure requirement of the water heater and the like, so that the conversion method of the wind speed is changed, the electric signal can reflect the wind resistance, and the frequency signal reflects the rotating speed of the fan. After the adaptation interval is determined, under the condition that the real-time rotating speed meets the preset normal operation condition, after the input voltage transmitted to the fan is stopped changing, whether the real-time rotating speed and the input current transmitted to the fan meet the preset adaptation interval or not is continuously detected. And if the real-time rotating speed and the input current transmitted to the fan meet the preset adaptation interval, taking the current real-time rotating speed and the current into consideration to meet the requirements, returning to the step S200, continuously acquiring the real-time rotating speed of the fan of the water heater in the running process, and executing the subsequent steps. If the real-time rotating speed and the input current transmitted to the fan do not meet the preset adaptation interval, the current real-time rotating speed and the current do not meet the requirements, the step S600 is returned, the input voltage transmitted to the fan is continuously increased, and the rotating speed of the motor is adjusted to meet the conditions as much as possible.
In one embodiment, referring to fig. 2, after step S500, or after step S600, the water heater fan control method further includes step S720.
Step S720: and when the real-time rotating speed does not meet the preset normal operation condition, sending a reminding instruction to the information reminding device.
After the rotating speed of the fan is adjusted, the adjusted rotating speed of the fan is continuously obtained, if the adjusted rotating speed of the fan does not meet the preset normal operation condition, the situation that the water heater cannot normally burn at the current rotating speed and hot water meeting the requirements of a user cannot be supplied is considered, a reminding instruction can be sent to the information prompting device at the moment, and the reminding instruction is used for controlling the information prompting device to send out prompting information of the abnormal rotating speed of the fan, so that the user can timely know the abnormal working condition of the water heater. And in an extensible manner, when the real-time rotating speed does not meet the preset normal operation condition, the controller can also control the water heater unit to stop and stop, so that the water heater is prevented from being further damaged.
The type of the information prompting device is not exclusive, and can be a display screen, a prompting lamp, a voice prompting device or the like. When the display screen is used as the information prompting device, after the display screen receives the reminding instruction, the words such as 'fan display abnormity' and the like can be displayed, or a warning picture is displayed, the real-time rotating speed can be directly displayed, and a user can clearly know the working state of the water heater conveniently. The prompting lamp is used as an information prompting device and the like, can play a role of information prompting through different colors of the display lamp, the flickering state of the display lamp and the like under the condition of lighting the display lamp, and is simple to use and low in use cost. When the voice prompt device is used as the information prompt device, prompt information can be sent through voice broadcasting, a user can know the abnormal working state of the rotating speed of the fan of the water heater without raising the head, and the use is convenient and fast. It is understood that in other embodiments, the information prompting device can be of other types as long as the implementation is considered by those skilled in the art.
In one embodiment, the real-time rotation speed satisfying the preset normal operation condition includes: the real-time rotating speed is greater than the preset rotating speed lower limit value and less than or equal to the preset rotating speed upper limit value. The values of the lower limit value and the upper limit value of the preset rotating speed are not unique and can be adjusted according to actual conditions. When the real-time rotating speed is greater than the preset rotating speed lower limit value and less than or equal to the preset rotating speed upper limit value, the fan is considered to enable the water heater to normally work at the current rotating speed. The lower limit value of the preset rotating speed can be obtained when the minimum heat load is met, when the lower limit value of the preset rotating speed is less than the minimum rotating speed, the air quantity provided by the fan cannot meet the normal combustion of the hearth, and the upper limit value of the preset rotating speed also depends on the performance of the fan and the maximum value of the required air quantity of the water heater.
For a better understanding of the above embodiments, the following detailed description is given in conjunction with a specific embodiment. In one embodiment, a flow chart of a water heater fan control method is shown in fig. 4, which is a schematic diagram of a water heater segment valve. When the water heater full fire grate burns, the power can not be reduced to a lower level, and the phenomenon of overtemperature in summer sometimes occurs, so the current mainstream technology is to divide the water heater fire grate into a plurality of sections (such as three valves and four sections) for burning, the disconnection of each section is controlled by a sectional valve, only one row burns in low power, the minimum power can be greatly reduced, and the water temperature in summer is controlled.
The water heater adopts a direct current fan, four wires are connected with a controller, two wires are connected with a voltage supply terminal, the controller inputs different voltage values to the fan according to a feedback mechanism, the other two frequency converters are connected with a fan motor terminal and used for feeding back the frequency of the fan in the operation process, the frequency is an electric signal, and the controller can convert the frequency into the rotating speed of the fan. The controller calculates the rotating speed of the fan according to the characteristics of the frequency converter, and the calculation mode is different according to the different characteristics of each fan, for example, the frequency of a certain fan is 500, the controller needs to convert the rotating speed of the fan into the rotating speed of the fan, so that the rotating speed of the fan is 500 multiplied by 7.5 which is 3750r/min, and at the moment, the rotating speed of the fan is 3750 r/min. The original rotating speed of the fan can be changed by the difference of the input voltage of the controller to the fan so as to deal with the change of power and external conditions.
According to the type selection and the power of the water heater, the frequency signals and the current signals of the fans are required to be subjected to interval matching in the early stage, the interval corresponding relation of the frequency signals and the current signals is a mathematical model, the interval relation can be changed due to the electric signals of each fan, the wind pressure requirement of the water heater and the like, so that the conversion method of the wind speed is changed, the electric signals can reflect the wind resistance, and the frequency signals reflect the rotating speed of the fans. The fan frequency and current matching intervals of different power sections and different wind resistances meet the conditions that the water heater can normally burn, smoke discharged by a unit during burning meets the national standard and the like.
In the normal combustion process of water heater, lead to the outlet flue to block up or have the strong wind to when blowing off the outlet flue as external factor, will change the intraductal wind pressure value of cigarette, cause the windage to increase, the fan speed of rotation under the unchangeable condition of input voltage reduces this moment, the converter gives the controller with fan frequency signal transmission, the controller increases the input voltage to the fan according to speed signal, the fan rotational speed will be promoted in the input voltage increase, the controller detects that fan frequency and electric current are in corresponding the matching interval this moment, the rotational speed balance that the fan increased has fallen the increment of windage, cause furnace to maintain stable burning operating mode.
When the water heater is in the anti-wind state, when the external factor that causes the windage to increase eliminated, the wind pressure reduces in the tobacco pipe, cause the windage to reduce, the fan risees at the unchangeable condition speed of input voltage this moment, the converter gives the controller with fan frequency signal transmission, the controller reduces the input voltage to the fan according to speed signal, the input voltage reduces the fan rotational speed, the controller detects that fan frequency and electric current are in corresponding the matching interval this moment, the rotational speed balance that the fan reduces has fallen the reduction of windage, cause furnace to maintain stable combustion condition.
The lowest rotating speed and the highest rotating speed of the fan are set, the lowest rotating speed of the fan is obtained when the minimum heat load is met, and the air quantity provided by the fan cannot meet the normal combustion of the hearth when the lowest rotating speed is less than the minimum rotating speed; the maximum rotating speed is also the maximum value of the required air quantity of the water heater and depends on the performance of the fan. The control of the rotating speed of the fan is between the highest rotating speed and the lowest rotating speed, and when the rotating speed of the fan is higher than the highest rotating speed or cannot be higher than the lowest rotating speed after the fan is subjected to wind resistance logic control by the controller, the unit is flameout and shut down, and a wind pressure protection fault or a fan stalling fault is reported.
The water heater adopts direct current fan, and direct current fan adopts direct current drive, can carry out before the ignition of water heater and clean before the furnace, prevents to take place the detonation, relies on self draft to provide the negative pressure to furnace in the normal operating, causes the air convection, makes the gas can normally burn, and after flame-out, the fan can carry out the back and clean, clears away tail gas in the furnace. In the operation process of the water heater unit, the controller receives current and frequency fed back by the fan, judges whether the rotating speed of the fan is in an unbalanced state or not according to the corresponding value range matched in advance, if the frequency is low, the rotating speed of the fan is indicated to be low, the controller increases input voltage to the fan at the moment, and the rotating speed of the fan is increased so as to resist flue air pressure imbalance caused by external condition change. If the frequency is higher than normal, the rotating speed of the fan is high, the controller reduces the input voltage to the fan at the moment, the rotating speed of the fan is reduced, and the situation that the hearth is away from flame due to the fact that the rotating speed of the fan is too high is avoided. The combustion of the flame separated from the hearth shows that the rotating speed of the fan is too large, the flame is extracted, the combustion is in an abnormal state, the combustion is insufficient, and a large amount of heat is extracted to avoid heat exchange of the heat exchanger.
According to the water heater fan control method, after the real-time rotating speed of the fan of the water heater in the running process is obtained, the variation of the real-time rotating speed in a preset time period is calculated, and when the real-time rotating speed is judged to be reduced according to the variation, the input voltage transmitted to the fan is increased until the real-time rotating speed meets the preset normal running condition. In the normal combustion process of water heater, when external factors lead to the outlet flue to block up or have the strong wind to blow off the outlet flue, will change the interior wind pressure value of chimney, cause the windage to increase, the fan reduces in the unchangeable circumstances speed of input voltage, increase the input voltage who transmits to the fan this moment, the input voltage increases and will promote the fan rotational speed, the increment of windage has been fallen in the rotational speed balance that the fan increases, cause furnace to maintain stable burning operating mode, a series of problems that avoid burning unbalance to cause, thereby the use reliability of water heater has been improved.
In one embodiment, the water heater fan control device comprises a rotating speed acquisition module, a rotating speed calculation module and a boosting module, wherein the rotating speed acquisition module is used for acquiring the real-time rotating speed of a fan of a water heater in the operation process, the rotating speed calculation module is used for calculating the variation of the real-time rotating speed in a preset time period, and the boosting module is used for increasing the input voltage transmitted to the fan when the real-time rotating speed is judged to be reduced according to the variation.
In one embodiment, the water heater fan control device further comprises a voltage reduction module, wherein the voltage reduction module is used for reducing the input voltage transmitted to the fan when the real-time rotating speed is judged to be increased according to the variation after the rotating speed calculation module calculates the variation of the real-time rotating speed in the preset time period.
In one embodiment, the water heater fan control device further comprises a stopping module, wherein the stopping module is used for stopping changing and increasing the input voltage transmitted to the fan after the input voltage transmitted to the fan is increased when the real-time rotating speed is judged to be reduced according to the variation by the boosting module, or after the input voltage transmitted to the fan is reduced when the real-time rotating speed is judged to be increased according to the variation by the voltage reducing module, and when the real-time rotating speed meets the preset normal operation condition.
In one embodiment, the water heater fan control device further comprises a detection module, and the detection module is used for detecting whether the real-time rotating speed and the input current transmitted to the fan meet a preset adaptation interval or not after the stopping module stops changing and increasing the input voltage transmitted to the fan when the real-time rotating speed meets the preset normal operation condition.
In one embodiment, the water heater fan control device further comprises a reminding module, wherein the reminding module is used for sending a reminding instruction to the information prompting device after the voltage boosting module increases the input voltage transmitted to the fan when judging that the real-time rotating speed is reduced according to the variation, or after the voltage reducing module decreases the input voltage transmitted to the fan when judging that the real-time rotating speed is increased according to the variation, and when the real-time rotating speed does not meet the preset normal operation condition.
According to the water heater fan control device, after the real-time rotating speed of the fan of the water heater in the running process is obtained, the variable quantity of the real-time rotating speed in the preset time period is calculated, and when the real-time rotating speed is judged to be reduced according to the variable quantity, the input voltage transmitted to the fan is increased until the real-time rotating speed meets the preset normal running condition. In the normal combustion process of water heater, when external factors lead to the outlet flue to block up or have the strong wind to blow off the outlet flue, will change the interior wind pressure value of chimney, cause the windage to increase, the fan reduces in the unchangeable circumstances speed of input voltage, increase the input voltage who transmits to the fan this moment, the input voltage increases and will promote the fan rotational speed, the increment of windage has been fallen in the rotational speed balance that the fan increases, cause furnace to maintain stable burning operating mode, a series of problems that avoid burning unbalance to cause, thereby the use reliability of water heater has been improved.
In one embodiment, the water heater fan control device comprises a controller and a fan, wherein the controller is connected with the fan, the fan is used for feeding back the real-time rotating speed to the controller, and the controller is used for controlling the water heater fan according to the method. Wherein, the fan can be a direct current fan.
In one embodiment, the water heater fan control device further comprises an information prompting device, and the information prompting device is connected with the controller. After the rotating speed of the fan is adjusted, the adjusted rotating speed of the fan is continuously obtained, if the adjusted rotating speed of the fan does not meet the preset normal operation condition, the situation that the water heater cannot normally burn at the current rotating speed and hot water meeting the requirements of a user cannot be supplied is considered, a reminding instruction can be sent to the information prompting device at the moment, and the reminding instruction is used for controlling the information prompting device to send out prompting information of the abnormal rotating speed of the fan, so that the user can timely know the abnormal working condition of the water heater. And in an extensible manner, when the real-time rotating speed does not meet the preset normal operation condition, the controller can also control the water heater unit to stop and stop, so that the water heater is prevented from being further damaged.
The type of the information prompting device is not exclusive, and can be a display screen, a prompting lamp, a voice prompting device or the like. When the display screen is used as the information prompting device, after the display screen receives the reminding instruction, the words such as 'fan display abnormity' and the like can be displayed, or a warning picture is displayed, the real-time rotating speed can be directly displayed, and a user can clearly know the working state of the water heater conveniently. The prompting lamp is used as an information prompting device and the like, can play a role of information prompting through different colors of the display lamp, the flickering state of the display lamp and the like under the condition of lighting the display lamp, and is simple to use and low in use cost. When the voice prompt device is used as the information prompt device, prompt information can be sent through voice broadcasting, a user can know the abnormal working state of the rotating speed of the fan of the water heater without raising the head, and the use is convenient and fast. It is understood that in other embodiments, the information prompting device can be of other types as long as the implementation is considered by those skilled in the art.
According to the water heater fan control equipment, after the real-time rotating speed of the fan of the water heater in the running process is obtained, the variable quantity of the real-time rotating speed in the preset time period is calculated, and when the real-time rotating speed is judged to be reduced according to the variable quantity, the input voltage transmitted to the fan is increased until the real-time rotating speed meets the preset normal running condition. In the normal combustion process of water heater, when external factors lead to the outlet flue to block up or have the strong wind to blow off the outlet flue, will change the interior wind pressure value of chimney, cause the windage to increase, the fan reduces in the unchangeable circumstances speed of input voltage, increase the input voltage who transmits to the fan this moment, the input voltage increases and will promote the fan rotational speed, the increment of windage has been fallen in the rotational speed balance that the fan increases, cause furnace to maintain stable burning operating mode, a series of problems that avoid burning unbalance to cause, thereby the use reliability of water heater has been improved.
In one embodiment, a water heater is provided, comprising a water heater blower control device as described above. Generally, referring to fig. 6, a water heater generally comprises a water outlet pipeline 1, a gas pipeline 2, a controller 3, a water inlet pipeline 4, a segment valve 5, a furnace 6 and a fan 7.
According to the water heater, after the real-time rotating speed of the fan of the water heater in the running process is obtained, the variable quantity of the real-time rotating speed in the preset time period is calculated, and when the real-time rotating speed is judged to be reduced according to the variable quantity, the input voltage transmitted to the fan is increased until the real-time rotating speed meets the preset normal running condition. In the normal combustion process of water heater, when external factors lead to the outlet flue to block up or have the strong wind to blow off the outlet flue, will change the interior wind pressure value of chimney, cause the windage to increase, the fan reduces in the unchangeable circumstances speed of input voltage, increase the input voltage who transmits to the fan this moment, the input voltage increases and will promote the fan rotational speed, the increment of windage has been fallen in the rotational speed balance that the fan increases, cause furnace to maintain stable burning operating mode, a series of problems that avoid burning unbalance to cause, thereby the use reliability of water heater has been improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A water heater fan control method is characterized by comprising the following steps:
acquiring the real-time rotating speed of a fan of a water heater in the running process;
calculating the variation of the real-time rotating speed in a preset time period;
and when the real-time rotating speed is judged to be reduced according to the variable quantity, increasing the input voltage transmitted to the fan.
2. The water heater fan control method according to claim 1, wherein the obtaining of the real-time rotation speed of the water heater fan during operation comprises:
detecting the real-time rotation frequency of the fan in the running process;
and calculating the real-time rotating speed of the fan in the running process according to the real-time rotating frequency.
3. The method for controlling the fan of the water heater according to claim 1, wherein after calculating the variation of the real-time rotation speed in a preset time period, the method further comprises:
and when the real-time rotating speed is judged to be increased according to the variable quantity, reducing the input voltage transmitted to the fan.
4. The water heater fan control method of claim 3, wherein the increasing the input voltage to the fan when the real-time rotation speed is determined to decrease based on the variation, or the decreasing the input voltage to the fan when the real-time rotation speed is determined to increase based on the variation, further comprises:
and when the real-time rotating speed meets the preset normal operation condition, stopping changing and increasing the input voltage transmitted to the fan.
5. The water heater fan control method of claim 4, wherein after stopping changing the input voltage transmitted to the fan when the real-time speed meets a preset normal operating condition, further comprising:
detecting whether the real-time rotating speed and the input current transmitted to the fan meet a preset adaptation interval or not;
if yes, returning to the step of acquiring the real-time rotating speed of the fan of the water heater in the running process;
if not, returning to the step of increasing the input voltage transmitted to the fan when the real-time rotating speed is judged to be reduced according to the variable quantity.
6. The water heater fan control method of claim 3, wherein the increasing the input voltage to the fan when the real-time rotation speed is determined to decrease based on the variation, or the decreasing the input voltage to the fan when the real-time rotation speed is determined to increase based on the variation, further comprises:
and when the real-time rotating speed does not meet the preset normal operation condition, sending a reminding instruction to an information reminding device.
7. The water heater fan control method according to claim 4 or 6, wherein the real-time rotation speed meeting the preset normal operation condition comprises: the real-time rotating speed is greater than a preset rotating speed lower limit value and less than or equal to a preset rotating speed upper limit value.
8. A water heater fan control device, characterized by, includes:
the rotating speed acquisition module is used for acquiring the real-time rotating speed of the fan of the water heater in the running process;
the rotating speed calculating module is used for calculating the variable quantity of the real-time rotating speed in a preset time period;
and the boosting module is used for increasing the input voltage transmitted to the fan when the real-time rotating speed is judged to be reduced according to the variable quantity.
9. A water heater fan control device, comprising a controller and a fan, wherein the controller is connected with the fan, the fan is used for feeding back real-time rotating speed to the controller, and the controller is used for controlling the water heater fan according to the method of any one of claims 1 to 8.
10. The water heater fan control device of claim 9, further comprising an information prompting device connected to the controller.
11. A water heater comprising a water heater blower control device as claimed in any one of claims 9 to 10.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294836A (en) * | 2021-12-09 | 2022-04-08 | 华帝股份有限公司 | Wall-mounted boiler and operation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100320740B1 (en) * | 1999-08-30 | 2002-01-19 | 최진민 | control device of exhaust pan for boiler |
| JP2010230277A (en) * | 2009-03-27 | 2010-10-14 | Mitsubishi Electric Corp | Drying heater |
| CN104990268A (en) * | 2015-07-14 | 2015-10-21 | 佛山市顺德万和电气配件有限公司 | Blockage protection method for feed pipe and exhaust pipe of fully-premixed gas heating water heater |
| CN108691796A (en) * | 2018-06-27 | 2018-10-23 | 阿里斯顿热能产品(中国)有限公司 | Fan controller and control method |
| CN109269087A (en) * | 2018-08-01 | 2019-01-25 | 广州迪森家居环境技术有限公司 | Gas water-heating furnace and its monitoring adjusting method, heating system |
| CN111140527A (en) * | 2019-12-23 | 2020-05-12 | 华帝股份有限公司 | Control method and control system for stable operation of fan |
-
2020
- 2020-10-19 CN CN202011117277.4A patent/CN112254353B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100320740B1 (en) * | 1999-08-30 | 2002-01-19 | 최진민 | control device of exhaust pan for boiler |
| JP2010230277A (en) * | 2009-03-27 | 2010-10-14 | Mitsubishi Electric Corp | Drying heater |
| CN104990268A (en) * | 2015-07-14 | 2015-10-21 | 佛山市顺德万和电气配件有限公司 | Blockage protection method for feed pipe and exhaust pipe of fully-premixed gas heating water heater |
| CN108691796A (en) * | 2018-06-27 | 2018-10-23 | 阿里斯顿热能产品(中国)有限公司 | Fan controller and control method |
| CN109269087A (en) * | 2018-08-01 | 2019-01-25 | 广州迪森家居环境技术有限公司 | Gas water-heating furnace and its monitoring adjusting method, heating system |
| CN111140527A (en) * | 2019-12-23 | 2020-05-12 | 华帝股份有限公司 | Control method and control system for stable operation of fan |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294836A (en) * | 2021-12-09 | 2022-04-08 | 华帝股份有限公司 | Wall-mounted boiler and operation method thereof |
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