Fan control method, fan, gas water heater and storage medium

Abstract

The invention discloses a draught fan control method, a draught fan, a gas water heater and a storage medium, and the draught fan control method comprises the following steps that the rotating speed of the draught fan is obtained so that rotating speed deviation monitoring can be conducted on the draught fan; when it is determined that the fan has the rotating speed deviation, the reference control value of the fan is determined according to the current fan rotating speed and the reference control curve, and the actual control value of the fan is determined according to the current fan rotating speed and a preset mechanical deviation curve; when the deviation exists between the actual control value and the reference control value, it is determined that the fan has the rotating speed deviation caused by mechanical factors; and determining a mechanical rotating speed deviation correction value according to the actual control value and the reference control value, and correcting the actual control value of the fan according to the mechanical rotating speed deviation correction value so as to correct the rotating speed deviation of the fan caused by mechanical factors. According to the technical scheme, the influence of mechanical factors on rotating speed deviation of the fan can be eliminated to a certain extent, it is guaranteed that the rotating speed of the fan is constant under the same working condition, and the performance stability of the fan and related products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fan control, and in particular to a fan control method, a fan, a water heater and a storage medium. Background Art

[0002] In the related art, fans generally deliver air by driving the impeller to rotate via a motor. As the fan is used for a longer period of time, some mechanical factors may cause deviations in the fan speed. For example, as the use time goes by, due to mechanical wear of the motor bearings and related components, the fan impeller shaft and other components, the resistance to the mechanical rotation of the impeller becomes smaller, resulting in an increase in the fan speed under the same electrical control parameters. Alternatively, as the use time goes by, due to dust, foreign particles, and lubricating oil scaling and stagnation in the motor bearings and related components, the resistance to the mechanical rotation of the impeller becomes larger, resulting in a decrease in the fan speed under the same electrical control parameters. Traditional fans are usually unable to monitor and identify speed deviations caused by mechanical factors, and do not take any compensatory measures for speed deviations, resulting in poor performance stability of the fan and related products with the fan.

[0003] Taking gas water heater as an example, the increase of fan speed due to mechanical factors under the same electronic control parameters may lead to higher noise and combustion resonance, flame pulling up and causing flame separation or even blowing out, reduced heat transfer efficiency due to accelerated heat loss, poor constant temperature effect and other adverse consequences. The decrease of fan speed due to mechanical factors under the same electronic control parameters may lead to insufficient combustion and excessive harmful substances in the exhaust gas, short flame and possible flashback, poor constant temperature effect and other adverse consequences. Summary of the invention

[0004] The main purpose of the present invention is to propose a fan control method, which aims to eliminate the influence of mechanical factors on the speed deviation of the fan to a certain extent, ensure the constant speed of the fan under the same working conditions, and improve the performance stability of the fan and related products with the fan.

[0005] To achieve the above object, the fan control method proposed in the present invention comprises the following steps:

[0006] Obtain the fan speed to monitor the fan speed deviation;

[0007] When it is determined that there is a speed deviation of the fan, a reference control value of the fan is determined according to the current fan speed and the reference control curve, and an actual control value of the fan is determined according to the current fan speed and the preset mechanical deviation curve;

[0008] When there is a deviation between the actual control value and the reference control value, it is determined that the fan has a speed deviation caused by mechanical factors;

[0009] A mechanical speed deviation correction value is determined according to the actual control value and the reference control value, and the actual control value of the fan is corrected according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors.

[0010] In one embodiment, determining that there is a speed deviation of the fan is specifically:

[0011] When the fan speed does not fall within the target speed range, it is determined that the fan has a speed deviation.

[0012] In one embodiment, the reference control curve is a calibration curve of the relationship between the fan control value and the fan speed, and the preset mechanical deviation curve is a curve of the relationship between the fan control value and the fan speed after a mechanical abnormality occurs in the fan.

[0013] In one embodiment, the actual control value of the fan is corrected according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors, specifically:

[0014] Adjust the actual control value of the fan so that the actual control value is close to or equal to the reference control value.

[0015] In one embodiment, the step of obtaining the fan speed specifically includes:

[0016] Detect the working current of the fan;

[0017] The fan speed is calculated based on the corresponding relationship between the fan speed and the fan's operating current.

[0018] In one of the embodiments, under the current operating condition, an average value of the fan speed within a preset operating time is obtained as the fan speed.

[0019] In one embodiment, when there is a deviation between the actual control value and the reference control value, after the step of determining that there is a speed deviation of the fan caused by a mechanical factor, the step further includes:

[0020] Determine whether the speed deviation caused by mechanical factors is greater than a preset deviation threshold;

[0021] When the rotation speed deviation caused by mechanical factors is greater than the preset deviation threshold, the step of correcting the rotation speed deviation of the fan is performed.

[0022] In one embodiment, before the step of obtaining the fan speed to monitor the fan speed deviation, the step further includes:

[0023] Get the cumulative running time of the fan;

[0024] Determine whether the accumulated running time of the fan reaches the preset running time;

[0025] When the accumulated running time of the fan reaches the preset running time, the step of obtaining the fan speed is performed to monitor the speed deviation of the fan.

[0026] The present invention also provides a fan, comprising:

[0027] a memory, wherein a computer program is stored in the memory;

[0028] A processor is used to execute the computer program to implement the wind turbine control method as described above.

[0029] The present invention also provides a water heater, comprising:

[0030] Fan;

[0031] a memory, wherein a computer program is stored in the memory;

[0032] A processor is electrically connected to the wind turbine, and the processor is used to execute the computer program so that the wind turbine implements the wind turbine control method as described above.

[0033] The present invention further provides a storage medium, wherein the storage medium stores program instructions, and the program instructions can be executed to implement the fan control method as described above.

[0034] The technical solution of the present invention monitors the speed deviation of the fan and identifies whether the fan has a speed deviation caused by mechanical factors. Based on the existence of the speed deviation caused by mechanical factors, the mechanical speed deviation correction value is determined according to the actual control value and the reference control value, and the actual control value of the fan is corrected according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors. In this way, the influence of mechanical factors on the speed deviation of the fan can be eliminated to a certain extent, ensuring that the fan speed is constant under the same working conditions and is not affected by mechanical factors caused by excessive use time, thereby effectively improving the performance stability of the fan and related products having the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1 The fan speed and load characteristic curve of an embodiment of the gas water heater of the present invention (wherein curve a is the original machine characteristic reference curve, and curves b1 and b2 are characteristic curves after mechanical abnormality occurs);

[0037] Figure 2 for Figure 1 PWM duty cycle and fan speed characteristic curve of gas water heater (where curve a is the original machine characteristic reference curve, and curves b1 and b2 are characteristic curves after mechanical abnormality occurs);

[0038] Figure 3 It is a flow chart of the first embodiment of the fan control method of the present invention;

[0039] Figure 4 It is a flow chart of the second embodiment of the fan control method of the present invention;

[0040] Figure 5 It is a flow chart of the third embodiment of the fan control method of the present invention;

[0041] Figure 6 Schematic diagram of the flow chart of the fourth embodiment of the fan control method of the present invention.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] In the related art, as the fan is used for a longer period of time, the fan speed may deviate due to some mechanical factors (non-electrical control factors). Taking the constant flow fan used in the gas water heater as an example, the given fan speed is logically converted into the combustion load through the user-set temperature, and is determined by combining the load, speed and duty cycle characteristics of the fixed combustion system. In other words, the given fan speed has nothing to do with the deviation caused by mechanical failure or mechanical wear of the internal components of the combustion system including the fan, so for the electronic control, it cannot compensate and correct the relevant parameters based on the resulting deviation.

[0047] For gas water heaters, the increase in fan speed caused by mechanical factors under the same electronic control parameters is likely to lead to higher noise and the resulting combustion resonance, flame pulling up and causing flame separation or even blowing out, reduced heat transfer efficiency caused by accelerated heat loss, poor constant temperature effect, etc. Under the same electronic control parameters, the decrease in fan speed attenuation caused by mechanical factors is likely to lead to insufficient combustion causing excessive harmful substances in the exhaust gas, short flames causing flashback, poor constant temperature effect, etc.

[0048] Based on this, the present invention proposes a fan control method, which can monitor and identify the speed deviation caused by mechanical factors, and can correct and compensate for the speed deviation, so as to eliminate the influence of mechanical factors on the speed deviation of the fan to a certain extent, and ensure that the fan speed is constant under the same working conditions, and is not affected by mechanical factors caused by long use time, thereby effectively improving the performance stability of the fan and related products with the fan. The following mainly takes the application of the fan control method in a gas water heater as an example for explanation.

[0049] The invention provides a fan control method.

[0050] Please refer to Figure 3In one embodiment of the present invention, the fan control method comprises the following steps:

[0051] S1. Obtain the fan speed to monitor the fan speed deviation;

[0052] S2. When it is determined that there is a speed deviation of the fan, a reference control value of the fan is determined according to the current fan speed and the reference control curve, and an actual control value of the fan is determined according to the current fan speed and the preset mechanical deviation curve;

[0053] S3. When there is a deviation between the actual control value and the reference control value, it is determined that there is a speed deviation of the fan caused by mechanical factors;

[0054] S4. Determine a mechanical speed deviation correction value according to the actual control value and the reference control value, and correct the actual control value of the fan according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors.

[0055] In this embodiment, after obtaining the fan speed, the fan speed can be compared with the target speed. When the fan speed is inconsistent with the target speed (or the fan speed does not fall within the target speed range), it indicates that the fan has a speed deviation. When it is determined that the fan has a speed deviation, it is necessary to further determine whether the speed deviation is caused by mechanical factors. It can be understood that the fan speed generally corresponds to some electronic control values ​​(such as PWM duty cycle). The reference control curve (such as PWM duty cycle and fan speed reference characteristic curve) and the preset mechanical deviation curve (such as PWM duty cycle and fan speed characteristic curve after the fan has a mechanical abnormality) can be stored in the memory in advance. After obtaining the current speed of the fan, the reference control value of the fan (such as the reference PWM duty cycle) can be determined according to the reference control curve, and the actual control value of the fan (such as the actual PWM duty cycle) can be determined according to the preset mechanical deviation curve. The actual control value is compared with the reference control value. If there is a deviation between the actual control value and the reference control value, it is determined that the fan speed deviation is a speed deviation caused by mechanical factors. Then, a mechanical speed deviation correction value is determined according to the actual control value and the reference control value, and the actual control value of the fan is corrected according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors.

[0056] For example, there is usually a certain correspondence between the fan speed and the PWM duty cycle (Pulse Width Modulation), which can be represented by the PWM duty cycle and the fan speed characteristic curve. When a mechanical abnormality occurs in the fan, resulting in a speed deviation, the PWM duty cycle and the fan speed characteristic curve will also deviate from the reference characteristic curve.

[0057] Taking gas water heater as an example, Figure 1is the fan speed and load characteristic curve diagram, where curve a is the original machine fan speed and load reference characteristic curve; curve b1 or b2 is the fan speed and load characteristic curve after the fan has mechanical abnormality; Figure 1 It can be seen that there is a certain deviation between curve b1 or b2 and the reference characteristic curve a. Figure 2 is a characteristic curve diagram of PWM duty cycle and fan speed, wherein curve a is the original machine PWM duty cycle and fan speed reference characteristic curve; curve b1 or b2 is the PWM duty cycle and fan speed characteristic curve after the fan has a mechanical abnormality; Figure 2 It can be seen that there is a certain deviation between curve b1 or b2 and the reference characteristic curve a. It should be noted that Figure 1 and Figure 2 The characteristic curve shown is only exemplary. In actual application, the characteristic curve will be different due to the difference in combustion system, and the degree of deviation may not be regular. When there is a speed deviation caused by mechanical abnormality, a correction coefficient can be given by electronic control to re-correct the characteristic relationship between the user-set load, speed and PWM duty cycle, so that the value on curve b1 or b2 approaches or even falls into the characteristic value of curve a, thereby forcing the fan speed and load characteristic curve to fall back to the characteristic value of curve a, thereby maintaining the stability of the product fan performance output and improving a series of problems caused by speed deviation.

[0058] It should be noted that in the above step S4, the actual control value of the fan is corrected according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors. As long as the difference between the final fan speed after correction and the target speed (i.e., the speed deviation) is less than a certain preset value (e.g., 10r / min, 20r / min, etc.), it is not required that the final fan speed after correction is absolutely equal to the target speed. Of course, in an ideal state, the speed deviation is made zero by correcting the relationship between the fan speed and the PWM duty cycle characteristic.

[0059] The technical solution of the present invention monitors the speed deviation of the fan and identifies whether the fan has a speed deviation caused by mechanical factors. Based on the existence of the speed deviation caused by mechanical factors, the mechanical speed deviation correction value is determined according to the actual control value and the reference control value, and the actual control value of the fan is corrected according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors. In this way, the influence of mechanical factors on the speed deviation of the fan can be eliminated to a certain extent, ensuring that the fan speed is constant under the same working conditions and is not affected by mechanical factors caused by excessive use time, thereby effectively improving the performance stability of the fan and related products having the fan.

[0060] In one embodiment, determining that there is a speed deviation of the fan is specifically:

[0061] When the fan speed does not fall within the target speed range, it is determined that the fan has a speed deviation.

[0062] Specifically, when the speed deviation of the fan is monitored, the fan speed and the target speed are obtained. Then the fan speed is compared with the target speed interval. When the fan speed is less than the minimum value of the target speed interval or the fan speed is greater than the maximum value of the target speed interval, it indicates that the fan speed does not fall within the target speed interval, thereby determining that the fan has a speed deviation. In this embodiment, by setting a target speed interval rather than a single target speed value, the influence caused by the detection error can be eliminated to a certain extent. Even if the fan speed is inconsistent with a single target speed value, when the fan speed falls within the target speed interval, it can be considered to be within an acceptable error range and is not identified as a speed deviation, and there is no need for subsequent deviation identification and correction compensation.

[0063] In one embodiment, the reference control curve is a calibration curve of the relationship between the fan control value and the fan speed, and the preset mechanical deviation curve is a curve of the relationship between the fan control value and the fan speed after a mechanical abnormality occurs in the fan.

[0064] In the present embodiment, there is a certain corresponding relationship between the fan control value and the fan speed. When the fan control value changes, the fan speed will change accordingly. The calibration curve of the relationship between the fan control value and the fan speed under normal conditions (that is, when no mechanical abnormality occurs) can be used as a reference control curve, and based on the same electrical control parameters, the mechanical abnormality state operation is simulated and monitored for the fan prototype of the same model to obtain the relationship curve between the fan control value and the fan speed after the mechanical abnormality occurs. Optionally, in the present embodiment, the fan control value adopts the PWM duty cycle, and accordingly, the reference control curve is the PWM duty cycle and the fan speed reference characteristic curve, and the mechanical deviation curve is the PWM duty cycle and the fan speed characteristic curve after the mechanical abnormality occurs in the fan. Of course, in other embodiments, other fan control values ​​can also be used to control the fan speed, and accordingly, the reference control curve is also different.

[0065] For example, when a mechanical abnormality occurs in the fan and causes a speed deviation, the PWM duty cycle and the fan speed characteristic curve will also deviate from the reference characteristic curve. Based on this, the speed deviation caused by mechanical factors can be monitored. Specifically, the relationship between the PWM duty cycle and the fan speed reference characteristic under a certain electronic control parameter is used as a reference benchmark. Figure 2In the fan development stage, based on the same electronic control parameters, the mechanical abnormality state of the fan prototype of the same model can be simulated and monitored to obtain the characteristic relationship between the PWM duty cycle and the fan speed after the mechanical abnormality occurs. The characteristic curve of the PWM duty cycle and the fan speed after the mechanical abnormality occurs (for example Figure 2 For example, curve b1 may represent a situation where the mechanical resistance caused by mechanical abnormality is reduced and the fan speed is increased; curve b2 may represent a situation where the mechanical resistance caused by mechanical abnormality is increased and the fan speed is reduced.

[0066] According to the relationship between the PWM duty cycle and the reference characteristic of the fan speed, the reference PWM duty cycle corresponding to the current fan speed can be obtained; according to the relationship between the PWM duty cycle and the fan speed after the mechanical abnormality occurs, the actual PWM duty cycle corresponding to the current fan speed can be obtained. Then the actual PWM duty cycle is compared with the reference PWM duty cycle to see whether the difference between the two is zero. If the difference is zero, it indicates that there is no deviation. If the difference is not zero, it indicates that there is a deviation. Based on the same electronic control parameters, when the fan speed is the same, if the actual PWM duty cycle obtained deviates from the reference PWM duty cycle, it can be determined that the fan has a speed deviation caused by mechanical factors. In this way, the speed deviation of the fan caused by mechanical factors can be accurately identified and monitored, thereby ensuring the accuracy of fan control and improving the performance stability of the fan and its related products.

[0067] Furthermore, the actual control value of the fan is corrected according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors, specifically:

[0068] Adjust the actual control value of the fan so that the actual control value is close to or equal to the reference control value.

[0069] In this embodiment, based on the deviation between the actual control value (e.g., the actual PWM duty cycle) and the reference control value (e.g., the reference PWM duty cycle), after determining that the fan has a speed deviation caused by mechanical factors, the actual control value can be adjusted to make the actual control value close to or equal to the reference control value, thereby reducing or making the fan speed deviation caused by mechanical factors zero. For example, after obtaining the actual PWM duty cycle and the reference PWM duty cycle, the offset of the actual PWM duty cycle relative to the reference PWM duty cycle can be calculated. △ P, the motherboard will re-compensate the offset △ P, so that the PWM duty ratio and fan speed characteristic curve (for example Figure 2 The curve b1 or curve b2) approaches or even falls into the PWM duty cycle and fan speed reference characteristic curve (e.g. Figure 2Curve a in the figure). For example, taking the PWM duty ratio and fan speed characteristic curve after the occurrence of mechanical abnormality as curve b1 as an example, combining curve b1 and curve a, it can be seen that when the current speed of the fan is the same, the actual PWM duty ratio corresponding to curve b1 is smaller than the reference PWM duty ratio corresponding to curve a. At this time, the actual PWM duty ratio can be increased to make the actual PWM duty ratio close to or equal to the reference PWM duty ratio. For another example, taking the PWM duty ratio and fan speed characteristic curve after the occurrence of mechanical abnormality as curve b2 as an example, combining curve b2 and curve a, it can be seen that when the current speed of the fan is the same, the actual PWM duty ratio corresponding to curve b2 is larger than the reference PWM duty ratio corresponding to curve a. At this time, the actual PWM duty ratio can be reduced to make the actual PWM duty ratio close to or equal to the reference PWM duty ratio.

[0070] Considering that the current speed of the fan cannot be directly measured in actual applications, in order to obtain the current speed of the fan more accurately, please refer to Figure 4 In one embodiment, the step of obtaining the fan speed specifically includes:

[0071] S11, detect the working current of the fan;

[0072] S12. Calculate the fan speed based on the corresponding relationship between the fan speed and the working current of the fan.

[0073] In this embodiment, the corresponding relationship between the fan speed and the working current of the fan is utilized to convert the current fan speed into the working current of the fan, so that the current fan speed can be accurately obtained, which is beneficial to the subsequent precise control of the fan to improve the performance stability of the fan and its related products.

[0074] In order to more accurately reflect the current fan speed, in one embodiment, under the current operating condition, the average value of the fan speed within a preset operating time is obtained as the fan speed.

[0075] In this embodiment, by obtaining the fan speed within a preset operating time (for example, 5 seconds or 10 seconds) and calculating the average fan speed, and using the average fan speed as the current fan speed, errors caused by single-point or instantaneous detection can be effectively avoided, thereby being able to more accurately reflect the current fan speed, which is beneficial to the subsequent precise control of the fan, so as to improve the performance stability of the fan and its related products.

[0076] Please refer to Figure 5 In one embodiment, when there is a deviation between the actual control value and the reference control value, the step of determining that there is a speed deviation of the fan caused by mechanical factors further includes:

[0077] Determine whether the speed deviation caused by mechanical factors is greater than a preset deviation threshold;

[0078] When the rotation speed deviation caused by mechanical factors is greater than the preset deviation threshold, the step of correcting the rotation speed deviation of the fan is performed.

[0079] Specifically, in this embodiment, a preset deviation threshold value (for example, the preset deviation threshold value may be 20r / min, 30r / min, etc.) may be pre-set in the control program, and the correction and compensation measures are only executed when the fan speed deviation caused by mechanical factors is greater than the preset deviation threshold value; when the fan speed deviation caused by mechanical factors is less than or equal to the preset deviation threshold value, the correction and compensation measures are not executed. In this way, it is possible to avoid frequent correction and compensation measures when the fan has a small speed deviation.

[0080] Based on the above examples, please refer to Figure 6 In one embodiment, before the step of obtaining the fan speed to monitor the fan speed deviation, the step further includes:

[0081] S01. Obtain the accumulated running time of the fan;

[0082] S02, determining whether the accumulated running time of the fan reaches the preset running time;

[0083] When the accumulated running time of the fan reaches the preset running time, the step of obtaining the fan speed is performed to monitor the speed deviation of the fan.

[0084] In this embodiment, the frequency of the electronic control mainboard monitoring identification deviation can be determined based on the reliability of the fan itself. For example, the fan itself or its complete product can be subjected to a life test to obtain relevant attenuation data. The monitoring frequency is then determined based on the relevant test data. Based on the different types of fans, the corresponding attenuation data is also different, and the monitoring frequency finally formulated is also different. For example, a preset operating time (for example, 40h, 80h, 100h, etc.) can be pre-set in the control program, and the speed deviation of the fan is monitored at regular intervals (for example, when the cumulative operating time of the fan reaches the preset operating time). In this way, the monitoring frequency can better match the operating attenuation data of the fan, and frequent monitoring of the fan in a short period of time can be avoided.

[0085] The present invention further provides a wind turbine, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is used to execute the computer program to implement a wind turbine control method.

[0086] The present invention also provides a gas water heater, comprising a fan, a memory and a processor. The memory stores a computer program; the processor is electrically connected to the fan, and the processor is used to execute the computer program so that the fan implements the fan control method as described in the above embodiment.

[0087] The present invention further provides a storage medium, wherein the storage medium stores program instructions, and the program instructions can be executed to implement a fan control method.

[0088] In the above-mentioned fan, water heater or storage medium, the fan control method comprises the following steps:

[0089] Obtain the fan speed to monitor the fan speed deviation;

[0090] When it is determined that there is a speed deviation of the fan, a reference control value of the fan is determined according to the current fan speed and the reference control curve, and an actual control value of the fan is determined according to the current fan speed and the preset mechanical deviation curve;

[0091] When there is a deviation between the actual control value and the reference control value, it is determined that the fan has a speed deviation caused by mechanical factors;

[0092] A mechanical speed deviation correction value is determined according to the actual control value and the reference control value, and the actual control value of the fan is corrected according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors.

[0093] In one embodiment, determining that there is a speed deviation of the fan is specifically:

[0094] When the fan speed does not fall within the target speed range, it is determined that the fan has a speed deviation.

[0095] In one embodiment, the reference control curve is a calibration curve of the relationship between the fan control value and the fan speed, and the preset mechanical deviation curve is a curve of the relationship between the fan control value and the fan speed after a mechanical abnormality occurs in the fan.

[0096] In one embodiment, the actual control value of the fan is corrected according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors, specifically:

[0097] Adjust the actual control value of the fan so that the actual control value is close to or equal to the reference control value.

[0098] In one embodiment, the step of obtaining the fan speed specifically includes:

[0099] Detect the working current of the fan;

[0100] The fan speed is calculated based on the corresponding relationship between the fan speed and the fan's operating current.

[0101] In one of the embodiments, under the current operating condition, an average value of the fan speed within a preset operating time is obtained as the fan speed.

[0102] In one embodiment, when there is a deviation between the actual control value and the reference control value, after the step of determining that there is a speed deviation of the fan caused by a mechanical factor, the step further includes:

[0103] Determine whether the speed deviation caused by mechanical factors is greater than a preset deviation threshold;

[0104] When the rotation speed deviation caused by mechanical factors is greater than the preset deviation threshold, the step of correcting the rotation speed deviation of the fan is performed.

[0105] In one embodiment, before the step of obtaining the fan speed to monitor the fan speed deviation, the step further includes:

[0106] Get the cumulative running time of the fan;

[0107] Determine whether the accumulated running time of the fan reaches the preset running time;

[0108] When the accumulated running time of the fan reaches the preset running time, the step of obtaining the fan speed is performed to monitor the speed deviation of the fan.

[0109] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fan control method, characterized in that: The following steps are involved: Obtain the fan speed to monitor the fan speed deviation; When it is determined that there is a speed deviation of the fan, a reference control value of the fan is determined according to the current fan speed and the reference control curve, and an actual control value of the fan is determined according to the current fan speed and the preset mechanical deviation curve; When there is a deviation between the actual control value and the reference control value, it is determined that the fan has a speed deviation caused by mechanical factors; A mechanical speed deviation correction value is determined according to the actual control value and the reference control value, and the actual control value of the fan is corrected according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors.

2. The fan control method according to claim 1, characterized in that: The determination of the fan speed deviation is specifically as follows: When the fan speed does not fall within the target speed range, it is determined that the fan has a speed deviation.

3. The fan control method according to claim 1, characterized in that: The reference control curve is a calibration curve of the relationship between the fan control value and the fan speed, and the preset mechanical deviation curve is a curve of the relationship between the fan control value and the fan speed after a mechanical abnormality occurs in the fan.

4. The fan control method according to claim 3, characterized in that: The actual control value of the fan is corrected according to the mechanical speed deviation correction value to correct the speed deviation of the fan caused by mechanical factors as follows: Adjust the actual control value of the fan so that the actual control value is close to or equal to the reference control value.

5. The fan control method according to claim 1, characterized in that: The step of obtaining the fan speed specifically includes: Detect the working current of the fan; The fan speed is calculated based on the corresponding relationship between the fan speed and the fan's operating current.

6. The fan control method according to claim 1, characterized in that: Under the current operating condition, the average value of the fan speed within the preset operating time is obtained as the fan speed.

7. The fan control method according to claim 1, characterized in that: After the step of determining that the fan has a speed deviation caused by mechanical factors when the actual control value has a deviation from the reference control value, the method further includes: Determine whether the speed deviation caused by mechanical factors is greater than a preset deviation threshold; When the rotation speed deviation caused by mechanical factors is greater than the preset deviation threshold, the step of correcting the rotation speed deviation of the fan is performed.

8. The fan control method according to any one of claims 1 to 7, characterized in that: Before the step of obtaining the fan speed to monitor the fan speed deviation, the method further includes: Get the cumulative running time of the fan; Determine whether the accumulated running time of the fan reaches the preset running time; When the accumulated running time of the fan reaches the preset running time, the step of obtaining the fan speed is performed to monitor the speed deviation of the fan.

9. A fan, characterized in that: include: a memory, wherein a computer program is stored in the memory; A processor, wherein the processor is used to execute the computer program to implement the wind turbine control method according to any one of claims 1 to 8.

10. A gas water heater, characterized in that: include: Fan; a memory, wherein a computer program is stored in the memory; A processor is electrically connected to the wind turbine, and the processor is used to execute the computer program to enable the wind turbine to implement the wind turbine control method according to any one of claims 1 to 8.

11. A storage medium, characterized in that: The storage medium stores program instructions, and the program instructions can be executed to implement the wind turbine control method according to any one of claims 1 to 8.

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