CN112923571A - Control method of gas water heater, gas water heater and readable storage medium - Google Patents
Control method of gas water heater, gas water heater and readable storage medium Download PDFInfo
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- CN112923571A CN112923571A CN202110200115.5A CN202110200115A CN112923571A CN 112923571 A CN112923571 A CN 112923571A CN 202110200115 A CN202110200115 A CN 202110200115A CN 112923571 A CN112923571 A CN 112923571A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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Abstract
The invention provides a control method of a gas water heater, the gas water heater and a readable storage medium. The control method of the gas water heater comprises the following steps: controlling the fan to operate according to a first air speed corresponding to the operation stage of the gas water heater; acquiring the current of a fan; and adjusting the wind speed of the fan according to the current. Make under the condition that gas heater takes place to block up, mend wind, the anti-wind automatically, reduce the gas heater and block up the harmful effects that causes burning and exhaust, thereby ensure that the gas can fully burn, guarantee gas heater's combustion efficiency, not only can provide the hot water output steadily for the user, can also control carbon monoxide at safe level, even under the comparatively serious scene of air current flowing backward, also can accurate discernment and start carbon monoxide's safety alarm device, guarantee user's safety in utilization.
Description
Technical Field
The invention relates to the technical field of gas water heaters, in particular to a control method of a gas water heater, the gas water heater and a readable storage medium.
Background
At present, high-rise residences have the advantages of sufficient lighting, wide visual field, noise isolation and the like, and have potential problems. For example, when an alternating current type fan gas water heater is installed in a high-rise household, the wind speed is fixed, the problem that a smoke tube is filled with strong wind backward to cause flameout or the combustion efficiency is reduced can be faced without wind supplement function, bathing experience is poor due to sudden 'cold' of bathing water, a large amount of CO is generated due to reduction of the combustion efficiency, and the potential safety hazard caused by the phenomenon is worried.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention provides a control method for a gas water heater.
The second aspect of the invention also provides a gas water heater.
A third aspect of the invention also provides a readable storage medium.
In view of the above, a first aspect of the present invention provides a method for controlling a gas water heater, where the gas water heater includes a blower, and the method includes: controlling the fan to operate according to a first air speed corresponding to the operation stage of the gas water heater; acquiring the current of a fan; and adjusting the wind speed of the fan according to the current.
The control method of the gas water heater provided by the invention identifies the current operation stage of the gas water heater, determines the operation parameters required by the operation stage of the gas water heater according to the demand load of the operation stage, wherein the operation parameters comprise the first wind speed of the fan, and controls the fan to operate according to the first wind speed corresponding to the operation stage. In the running process of the fan, the current of the fan running at the first wind speed is periodically collected, whether the gas water heater is in a blocking state or not is judged according to the current, and the wind speed of the fan is adjusted according to the blocking state. Make under the condition that gas heater takes place to block up, mend wind, the anti-wind automatically, reduce the gas heater and block up the harmful effects that cause burning and exhaust, thereby ensure that the gas can fully burn, guarantee the combustion efficiency of combustor, not only can provide the hot water output steadily for the user, can also control carbon monoxide at safe level, even under the comparatively serious scene of air current flowing backward, also can accurate discernment and start the safety alarm device of carbon monoxide, guarantee user's safety in utilization.
It can be understood that the blockage of the gas water heater may be caused by foreign matters in the smoke pipe or by the backflow of outside air flow.
It should be noted that the gas water heater includes a fan, and the fan may be a direct current fan. The fan is used for conveying air to the combustor and discharging waste gas generated by the combustor. Specifically, the fan sends air into the combustion chamber of the gas water heater in a lower blowing mode, gas is controlled through the gas valve and is introduced into the combustor through the gas inlet pipeline, the gas is ignited and combusted through the combustor to generate heat, and the heat heats water flowing through the heat exchanger to generate hot water. Under the effect of fan, the waste gas that the burning produced in the combustion chamber is collected by collection petticoat pipe to discharge gas heater through the tobacco pipe, thereby can avoid burning flue gas or remaining harmful gas to stay indoor, guarantee indoor air quality. The current of the fan is collected through the current detection assembly.
Specifically, the operating phase includes a pre-ignition purge phase, a post-ignition combustion phase, a post-combustion purge phase, and the like.
According to the control method of the gas water heater provided by the invention, the following additional technical characteristics can be provided:
in the above technical solution, further, according to the current, adjust the wind speed of the wind turbine, including: acquiring a parameter corresponding relation among the wind speed of a fan, the blockage grade of the gas water heater and the current threshold of the fan; determining a first current threshold corresponding to the first wind speed according to the parameter corresponding relation; and controlling the wind speed of the fan to be increased to a second wind speed according to the first offset amount based on the current being smaller than the first current threshold value.
In the technical scheme, the gas water heater is pre-stored with a parameter corresponding relation among the wind speed of the fan, the blockage grade of the gas water heater and the current threshold of the fan, and a first current threshold corresponding to a first wind speed, namely the theoretical current of the fan in normal operation at the first wind speed, can be inquired through the parameter corresponding relation. And comparing the current detected currently with the first current threshold, if the current is smaller than the first current threshold, indicating that the gas water heater is blocked, controlling the wind speed of the fan to rise to a second wind speed according to the first offset, namely, increasing the wind speed of the fan so as to supplement wind and resist wind. Thereby ensuring the normal combustion of the burner when the exhaust is not smooth.
It should be noted that the first current threshold corresponding to the first wind speed includes a plurality of sets of values, and the plurality of sets of values respectively correspond to different blockage levels. If the current is greater than or equal to the current threshold value with the blockage grade of 0, namely the theoretical current of the normal operation of the fan when the gas water heater is not blocked, the wind speed does not need to be adjusted, and the requirement of the current operation stage can be met by maintaining the first wind speed of the fan.
Specifically, the parameter correspondence among the wind speed of the fan, the blockage level of the gas water heater and the current threshold of the fan is used for marking theoretical current data (current threshold) of the fan under the conditions of different blockage levels and different wind speeds. The blockage grades are used for representing different blockage degrees of the gas water heater, the blockage grades are divided through parameters such as exhaust resistance, and the blockage grades can be reasonably set according to the use requirements of users.
In any of the above technical solutions, further, the control method of the gas water heater further includes: determining an N-level blockage grade corresponding to the first current threshold according to the parameter corresponding relation based on the fact that the current is smaller than the first current threshold; and determining a first offset according to the N-level blockage grade.
In the technical scheme, under the condition that the current is smaller than the first current threshold value, namely the gas water heater is blocked, the N-level blocking grade corresponding to the first current threshold value is determined according to the parameter corresponding relation among the wind speed of the fan, the blocking grade and the current threshold value. Wherein N is an integer greater than or equal to 0 and is used to indicate the level of clogging. Therefore, the blockage degree of the current gas water heater can be detected through the N-level blockage grade. Further, the first offset, that is, the wind speed increase amount, is determined according to a correspondence between a preset clogging level and the first offset. Therefore, the wind speed of the fan is dynamically increased according to different blocking degrees, normal air supply of the fan can be guaranteed under different use conditions, and the reliability of the gas water heater is improved.
It is understood that the first offset amount corresponding to different clogging levels is different in the correspondence relationship between the clogging level and the first offset amount, which is related to parameters such as a demand load of the gas water heater, a gear of the fan, an air supply amount of the burner, and the like.
In any of the above technical solutions, further, after controlling the wind speed of the wind turbine to rise to the second wind speed according to the first offset, the method further includes: determining a second current threshold corresponding to the N-level blockage grade and a third current threshold corresponding to the N + 1-level blockage grade according to the parameter corresponding relation and the second wind speed; adjusting the wind speed of the fan according to the second current threshold and the third current threshold; wherein the second current threshold is greater than the third current threshold.
According to the technical scheme, after the wind speed of the fan is increased to a second wind speed, a second current threshold corresponding to an N-level blockage grade and a third current threshold corresponding to an N + 1-level blockage grade are determined according to a parameter corresponding relation and the second wind speed, namely, the blockage grade of the gas water heater after the wind speed is adjusted and the theoretical current of the next-level blockage grade are determined, so that whether the fan running at the second wind speed can meet the normal combustion requirement of the combustor is further verified through the current after the speed is adjusted, the second current threshold and the third current threshold, if the adjusted second wind speed cannot meet the requirement or the blockage problem is eliminated, the wind speed of the fan is continuously adjusted to correct the wind speed until the wind speed of the fan can maintain the normal combustion of the combustor. The accuracy of judging the blockage grade can be improved, the influence of blockage on combustion efficiency and personal safety can be reduced as much as possible, and the noise, smoke and efficiency of the gas water heater can be guaranteed to reach the optimal state.
In any of the above technical solutions, further, the adjusting the wind speed of the wind turbine according to the second current threshold and the third current threshold based on the operation phase being the combustion phase includes: controlling the wind speed of the fan to be reduced according to a second offset amount based on the current being greater than or equal to a second current threshold value; and controlling the wind speed of the fan to rise according to a third offset amount based on the current being less than a third current threshold value.
In the technical scheme, when the gas water heater is in a combustion stage, the magnitude relation between the current when the fan runs at the second wind speed and the second current threshold and the third current threshold is compared. The current when the fan operates at the second wind speed is greater than or equal to the second current threshold value, namely the fan adjusted to the second wind speed can meet the requirement load of combustion settlement, the problem of overlarge wind speed exists, the blocking condition is possibly solved, at the moment, the wind speed of the fan is controlled to be reduced according to the second offset amount, so that the wind speed is reduced, the burner is guaranteed to normally combust, meanwhile, the fan is prevented from working meaninglessly, and the energy consumption of the gas water heater is reduced.
When the current of the fan when the fan operates at the second wind speed is smaller than the third current threshold, which indicates that the fan operating at the second wind speed still cannot compensate the smoke pipe blockage or the wind resistance of airflow backflow, the wind speed of the fan is controlled to continue rising according to the preset third offset so as to ensure sufficient combustion and stably provide hot water for a user, and meanwhile, the blockage grade can be updated to be an N +1 grade blockage grade, so that the blockage grade detection accuracy is improved.
When the current of the fan when the fan operates at the second wind speed is greater than or equal to the third current threshold and is smaller than the second current threshold, the wind speed of the fan is suitable for the combustion requirement of the combustor at the moment, and the fan is maintained to operate at the second wind speed.
Specifically, the second offset amount and the third offset amount are both related to the clogging level.
In any of the above technical solutions, further, based on the operation phase being a pre-cleaning phase, adjusting the wind speed of the wind turbine according to the second current threshold and the third current threshold, includes: controlling the ignition of a burner of the gas water heater based on the current being greater than or equal to a second current threshold; and controlling the wind speed of the fan to rise according to a preset fourth offset value based on the fact that the current is smaller than the third current threshold value.
In the technical scheme, under the condition that the gas water heater is in the pre-cleaning stage, when the current of the fan when the fan runs at the second wind speed is larger than or equal to the second current threshold value, the situation that residual gas in the gas water heater is removed is indicated, the blocking degree of the gas water heater is reduced, namely the pre-cleaning is finished, and the combustor is controlled to be ignited to enter the combustion stage, and the required wind speed of the fan is adjusted again according to the hot water temperature required by a user. When the current of the fan running at the second wind speed is smaller than the third current threshold value, the fan running at the second wind speed still cannot compensate the wind resistance of smoke pipe blockage or airflow backflow, residual gas in the gas water heater can not be completely removed, the wind speed of the fan is controlled to rise according to the preset fourth offset, accordingly, the residual gas discharge intensity is enhanced, the phenomenon of deflagration caused by ignition is avoided, the cooling of high-temperature stored water in the gas water heater can be accelerated, and scalding of a user during use is prevented. When the current of the fan running at the second wind speed is greater than or equal to the third current threshold and smaller than the second current threshold, the second wind speed is maintained to continue the pre-sweeping operation.
Further, when the ignition of the burner is controlled, the gas valve of the gas water heater is controlled to be opened, so that gas is introduced into the burner through a gas pipeline, and gas combustion is started through ignition electric sparks. In the process of igniting at the combustor, carry out flame detection, based on the combustor ignition failure, also do not detect flame, count the number of times of ignition failure, control gas valve closes simultaneously, avoid the gas to leak, further improve gas heater's security. And outputting fault information based on the number of times greater than or equal to the number of times threshold value in the preset time length to prompt a user that ignition fails so as to facilitate timely maintenance.
Specifically, the wind speed of the wind turbine includes a first wind speed, a second wind speed, and a wind speed adjusted by a third offset and a fourth offset.
In addition, in order to simplify the control process, the current of the fan when the fan runs at the second wind speed can be directly compared with the third current threshold, the wind speed of the fan is controlled to be increased according to the preset fourth offset amount under the condition that the current is smaller than the third current threshold, the flowing resistance of the airflow in the gas water heater is small under the condition that the current is larger than or equal to the third current threshold, and the residual air in the gas water heater meets the safety standard, the burner of the gas water heater is controlled to ignite, the comparison process of the current and the second current threshold is reduced, the control strategy is simplified, and the heating response speed of the gas water heater is improved.
In any of the above technical solutions, further, the control method of the gas water heater further includes: determining a fourth current threshold corresponding to the wind speed of the fan according to the parameter corresponding relation and the wind speed of the fan; and outputting fault information based on the fact that the current is smaller than a fourth current threshold value, and controlling the gas water heater to be closed.
In the technical scheme, the fourth current threshold is theoretical current corresponding to the maximum blockage level when the fan runs at different wind speeds. If the detected current is smaller than the fourth current threshold value, the blockage situation of the gas water heater is serious at the moment, effective air supplement and wind resistance are carried out even if the wind speed of the fan is increased, the current safety of the gas water heater is low, fault information is output to warn a user that the blockage degree of the gas water heater is high, the gas water heater is closed in time, and potential safety hazards caused by the fact that the gas water heater continues to operate under the serious blockage situation are prevented.
Further, to the burning stage, after the measuring current is less than the fourth current threshold value, because block up and seriously influence the combustor and carry out normal combustion, if continue to heat, incomplete burning produces carbon monoxide and increases, leads to carbon monoxide to reveal easily, endangers personal safety, then control the gas valve and close to get into the back and clean the stage, close gas heater after the back cleans, thereby cause detonation scheduling problem when avoiding next start gas heater, and then improve the security and the reliability of gas heater work.
In any of the above technical solutions, further, the control method of the gas water heater further includes: under the condition that the gas water heater is in different preset blockage grades, acquiring current data of at least one group of fans operating at different preset wind speeds; generating at least one group of sampling point data according to the current data corresponding to each preset blockage grade and each preset wind speed; and performing linear fitting on the data of at least one group of sampling points to obtain a parameter corresponding relation.
In the technical scheme, the gas water heater has a self-learning function, different blocking grades of the gas water heater under different demand loads are simulated in a self-learning mode, and current data of multiple groups of fans running at different preset wind speeds are acquired under the condition of different preset blocking grades. And according to the current data corresponding to each preset blockage grade and each preset wind speed, counting multiple groups of current data detected under the condition of the same preset blockage grade and the same preset wind speed to obtain multiple groups of sampling point data. And performing linear fitting on the multiple groups of sampling point data to obtain a parameter corresponding relation. By means of the self-learning mode of the fan of the gas water heater, the current curve of the sampling point of the fan is learned, linear data are fitted, the problem of difference between the fans is solved, and the fan is controlled more accurately.
According to a second aspect of the present invention, there is also provided a gas water heater comprising: a fan; a memory storing a program or instructions; and the processor is connected with the memory and the fan, and when the processor executes the program or the instruction, the control method of the gas water heater provided by the first aspect is realized. Therefore, the gas water heater has all the beneficial effects of the control method of the gas water heater provided by the first aspect, and redundant description is omitted for avoiding repetition.
According to a third aspect of the present invention, there is provided a readable storage medium having stored thereon a program or instructions which, when executed by a processor, performs the control method of the gas water heater set forth in the first aspect. Therefore, the readable storage medium has all the beneficial effects of the control method of the gas water heater provided by the first aspect, and redundant description is omitted for avoiding repetition.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows one of the flow diagrams of a control method of a gas water heater of one embodiment of the present invention;
FIG. 2 shows a second schematic flow chart of a method of controlling a gas water heater according to an embodiment of the invention;
FIG. 3 is a third schematic flow chart of a method of controlling a gas water heater according to an embodiment of the present invention;
FIG. 4 shows a fourth flowchart of a control method of a gas water heater according to an embodiment of the present invention;
FIG. 5 shows a fifth flowchart of a control method of a gas water heater according to an embodiment of the present invention;
FIG. 6 shows a sixth schematic flow chart of a control method of a gas water heater according to an embodiment of the present invention;
FIG. 7 shows a seventh schematic flow chart of a control method of a gas water heater according to an embodiment of the present invention;
fig. 8 shows an eighth schematic flow chart of a control method of a gas water heater according to an embodiment of the present invention;
FIG. 9 shows a ninth schematic flow chart of a method of controlling a gas water heater in accordance with an embodiment of the present invention;
FIG. 10 is a line drawing illustrating parameter correspondence according to one embodiment of the present invention;
FIG. 11 shows a schematic block diagram of a gas water heater of one embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A control method of a gas water heater, and a readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 11.
Example 1:
as shown in fig. 1, according to an embodiment of the first aspect of the present invention, there is provided a control method of a gas water heater, the gas water heater including a fan, the method including:
step 102, controlling a fan to operate according to a first air speed corresponding to the operation stage of the gas water heater;
104, acquiring the current of the fan;
and 106, adjusting the wind speed of the fan according to the current.
In the embodiment, the current operation stage of the gas water heater is identified, the operation parameters required by the gas water heater to operate in the operation stage are determined according to the demand load of the operation stage, wherein the operation parameters comprise a first wind speed of the fan, and the fan is controlled to operate according to the first wind speed corresponding to the operation stage. In the running process of the fan, the current of the fan running at the first wind speed is periodically collected, whether the gas water heater is in a blocking state or not is judged according to the current, and the wind speed of the fan is adjusted according to the blocking state. Make under the condition that gas heater takes place to block up, mend wind, the anti-wind automatically, reduce the gas heater and block up the harmful effects that cause burning and exhaust, thereby ensure that the gas can fully burn, guarantee the combustion efficiency of combustor, not only can provide the hot water output steadily for the user, can also control carbon monoxide at safe level, even under the comparatively serious scene of air current flowing backward, also can accurate discernment and start the safety alarm device of carbon monoxide, guarantee user's safety in utilization.
It can be understood that the blockage of the gas water heater may be caused by foreign matters in the smoke pipe or by the backflow of outside air flow.
It should be noted that the gas water heater includes a fan, and the fan may be a direct current fan. The fan is used for conveying air to the combustor and discharging waste gas generated by the combustor. Specifically, the fan sends air into the combustion chamber of the gas water heater in a lower blowing mode, gas is controlled through the gas valve and is introduced into the combustor through the gas inlet pipeline, the gas is ignited and combusted through the combustor to generate heat, and the heat heats water flowing through the heat exchanger to generate hot water. Under the effect of fan, the waste gas that the burning produced in the combustion chamber is collected by collection petticoat pipe to discharge gas heater through the tobacco pipe, thereby can avoid burning flue gas or remaining harmful gas to stay indoor, guarantee indoor air quality.
Specifically, the operating phase includes a pre-ignition purge phase, a post-ignition combustion phase, a post-combustion purge phase, and the like.
Example 2:
as shown in fig. 2, according to an embodiment of the present invention, there is provided a control method of a gas water heater, including:
204, acquiring the current of the fan, and the parameter corresponding relation among the wind speed of the fan, the blockage grade of the gas water heater and the current threshold of the fan;
step 206, determining a first current threshold corresponding to a first wind speed according to the parameter corresponding relation;
and step 210, controlling the wind speed of the fan to be increased to a second wind speed according to the first offset.
In this embodiment, as shown in table 1 and fig. 10, a parameter corresponding relationship among the wind speed of the fan, the blockage level of the gas water heater, and the current threshold of the fan is prestored in the gas water heater, and the first current threshold corresponding to the first wind speed, that is, the theoretical current of the fan when the fan normally operates at the first wind speed, can be queried through the parameter corresponding relationship. And comparing the current detected currently with the first current threshold, if the current is smaller than the first current threshold, indicating that the gas water heater is blocked, controlling the wind speed of the fan to rise to a second wind speed according to the first offset, namely, increasing the wind speed of the fan so as to supplement wind and resist wind. Thereby ensuring the normal combustion of the burner when the exhaust is not smooth.
TABLE 1
It should be noted that, as shown in table 1, the first current threshold corresponding to the first wind speed includes a plurality of sets of values, and the plurality of sets of values respectively correspond to different blockage levels. If the current is greater than or equal to the current threshold value with the blockage grade of 0, namely the theoretical current of the normal operation of the fan when the gas water heater is not blocked, the wind speed does not need to be adjusted, and the requirement of the current operation stage can be met by maintaining the first wind speed of the fan.
As shown in fig. 10, in order to visually represent the parameter correspondence relationship, the parameter correspondence relationship may be represented in the form of a line graph. In consideration of the proportional relationship between the wind speed and the rotating speed of the fan, the corresponding relationship of the parameters can also be represented by the rotating speed instead of the wind speed.
Specifically, the parameter correspondence among the wind speed of the fan, the blockage level of the gas water heater and the current threshold of the fan is used for marking theoretical current data (current threshold) of the fan under the conditions of different blockage levels and different wind speeds. The blockage grades are used for representing different blockage degrees of the gas water heater, the blockage grades are divided through parameters such as exhaust resistance, and the blockage grades can be reasonably set according to the use requirements of users. In addition, under the condition of the same wind speed, the higher the blockage grade is, the more serious the blockage degree is, the larger the wind pressure is, the smaller the current of the fan is, so that the air obtained by the combustor is not uniform, the gas combustion is insufficient, the carbon monoxide content is higher, and the generated waste gas is difficult to discharge.
It can be understood that different parameter corresponding relations can be set for different operation stages because the demand loads of different operation stages of the gas water heater are different, that is, the requirements of the required wind speed of the fan are different. For example, the wind speed is 2000r/m for the combustion phase and the current for the class 1 blockage rating is 26A, and the same wind speed and current for the class blockage rating is 20A for the previous purge phase.
Example 3:
as shown in fig. 3, according to an embodiment of the present invention, there is provided a control method of a gas water heater, including:
304, acquiring the current of the fan, and the parameter corresponding relation among the wind speed of the fan, the blockage grade of the gas water heater and the current threshold of the fan;
and step 314, controlling the wind speed of the fan to be increased to a second wind speed according to the first offset.
In this embodiment, under the condition that the current is smaller than the first current threshold, that is, under the condition that the gas water heater is blocked, the N-level blocking level corresponding to the first current threshold is determined according to the parameter correspondence among the wind speed of the fan, the blocking level and the current threshold. Wherein N is an integer greater than or equal to 0 and is used to indicate the level of clogging. Therefore, the blockage degree of the current gas water heater can be detected through the N-level blockage grade. Further, the first offset, that is, the wind speed increase amount, is determined according to a correspondence between a preset clogging level and the first offset. Therefore, the wind speed of the fan is dynamically increased according to different blocking degrees, normal air supply of the fan can be guaranteed under different use conditions, and the reliability of the gas water heater is improved.
It is understood that the first offset amount corresponding to different clogging levels is different in the correspondence relationship between the clogging level and the first offset amount, which is related to parameters such as a demand load of the gas water heater, a gear of the fan, an air supply amount of the burner, and the like.
Furthermore, after the N-level blockage grade is determined, the N-level blockage grade can be informed to a user in a mode of outputting prompt information, so that the user can visually and timely know the operation environment of the gas water heater.
Example 4:
as shown in fig. 4, according to an embodiment of the present invention, there is provided a control method of a gas water heater, including:
404, acquiring the current of a fan, and the parameter corresponding relation among the wind speed of the fan, the blockage grade of the gas water heater and the current threshold of the fan;
and 418, adjusting the wind speed of the fan according to the second current threshold and the third current threshold.
Wherein the second current threshold is greater than the third current threshold.
In this embodiment, after the wind speed of the fan is increased to the second wind speed, the second current threshold corresponding to the N-level blockage level and the third current threshold corresponding to the N + 1-level blockage level are determined according to the parameter correspondence and the second wind speed, that is, the blockage level of the gas water heater after the wind speed adjustment and the theoretical current of the next-level blockage level are determined, so that whether the fan operating at the second wind speed can meet the normal combustion requirement of the combustor is further verified through the current after the speed adjustment, the second current threshold and the third current threshold, and if the adjusted second wind speed cannot meet the requirement or the blockage problem is eliminated, the wind speed of the fan is continuously adjusted to correct the wind speed until the wind speed of the fan can maintain the normal combustion of the combustor. The accuracy of judging the blockage grade can be improved, the influence of blockage on combustion efficiency and personal safety can be reduced as much as possible, and the noise, smoke and efficiency of the gas water heater can be guaranteed to reach the optimal state.
Example 5:
as shown in fig. 5, according to an embodiment of the present invention, there is provided a control method of a gas water heater, including:
step 502, controlling a fan to operate according to a first air speed corresponding to the combustion stage of the gas water heater;
step 504, acquiring the current of the fan, and the parameter corresponding relation among the wind speed of the fan, the blockage grade of the gas water heater and the current threshold value of the fan;
step 510, determining an N-level blockage grade corresponding to the first current threshold according to the parameter corresponding relation;
and step 524, controlling the wind speed of the fan to rise according to the third offset.
The second current threshold is greater than the third current threshold, and the second offset and the third offset are related to the blockage level, can be preset values by a user, and can also be a difference value between dampers of the gas water heater.
In the embodiment, when the gas water heater is in the combustion stage, the magnitude relation between the current when the fan runs at the second wind speed and the second current threshold and the third current threshold is compared.
The current when the fan operates at the second wind speed is greater than or equal to the second current threshold value, namely the fan adjusted to the second wind speed can meet the requirement load of combustion settlement, the problem of overlarge wind speed exists, the blocking condition is possibly solved, at the moment, the wind speed of the fan is controlled to be reduced according to the second offset amount, so that the wind speed is reduced, the burner is guaranteed to normally combust, meanwhile, the fan is prevented from working meaninglessly, and the energy consumption of the gas water heater is reduced.
When the current of the fan when the fan operates at the second wind speed is smaller than the third current threshold, which indicates that the fan operating at the second wind speed still cannot compensate the smoke pipe blockage or the wind resistance of airflow backflow, the wind speed of the fan is controlled to continue rising according to the preset third offset so as to ensure sufficient combustion and stably provide hot water for a user, and meanwhile, the blockage grade can be updated to be an N +1 grade blockage grade, so that the detection accuracy of the blockage grade is improved.
When the current of the fan when the fan operates at the second wind speed is greater than or equal to the third current threshold and is smaller than the second current threshold, the wind speed of the fan is suitable for the combustion requirement of the combustor at the moment, and the fan is maintained to operate at the second wind speed.
Example 6:
as shown in fig. 6, according to an embodiment of the present invention, there is provided a control method of a gas water heater, including:
step 602, controlling a fan to operate according to a first air speed corresponding to the gas water heater in a previous cleaning stage;
step 604, acquiring the current of the fan, and the parameter corresponding relation among the wind speed of the fan, the blockage grade of the gas water heater and the current threshold of the fan;
step 610, determining an N-level blockage grade corresponding to the first current threshold according to the parameter corresponding relation;
step 614, controlling the wind speed of the fan to be increased to a second wind speed according to the first offset;
step 616, determining a second current threshold corresponding to the N-level blockage level and a third current threshold corresponding to the N + 1-level blockage level according to the parameter correspondence and the second wind speed;
and step 624, controlling the wind speed of the fan to rise according to the fourth offset.
Wherein the second current threshold is greater than the third current threshold, and the fourth offset and the third offset are associated with a blockage level.
In this embodiment, when the current of the fan operating at the second wind speed is greater than or equal to the second current threshold value in the case that the gas water heater is in the pre-purging stage, it indicates that the residual gas in the gas water heater is removed and the clogging degree of the gas water heater is reduced, that is, the pre-purging is completed, and at this time, the burner is controlled to ignite to enter the combustion stage, and the required fan wind speed is readjusted according to the hot water temperature required by the user. When the current of the fan when the fan operates at the second wind speed is smaller than the third current threshold value, the fan operated at the second wind speed still cannot compensate the wind resistance of smoke pipe blockage or airflow backflow, residual gas in the gas water heater can not be completely removed, the wind speed of the fan is controlled to rise according to the preset fourth offset, so that the residual gas discharge intensity is enhanced, the phenomenon of deflagration caused by ignition is avoided, the cooling of high-temperature stored water in the gas water heater can be accelerated, and the scald of a user during use is prevented.
Further, when the ignition of the burner is controlled, the gas valve of the gas water heater is controlled to be opened, so that gas is introduced into the burner through a gas pipeline, and gas combustion is started through ignition electric sparks. In the process of igniting at the combustor, carry out flame detection, based on the combustor ignition failure, also do not detect flame, count the number of times of ignition failure, control gas valve closes simultaneously, avoid the gas to leak, further improve gas heater's security. And outputting fault information based on the number of times greater than or equal to the number of times threshold value in the preset time length to prompt a user that ignition fails so as to facilitate timely maintenance.
It will be appreciated that the cause of misfire may be gas line plugging, burner firing failure, combustion chamber gas leakage, etc.
Further, after the gas water heater is started, the gas water heater is controlled to enter a standby state to avoid dry burning, periodic water flow detection is carried out, if water flow is detected, and water to be heated can enter the gas water heater to be heated, the gas water heater is controlled to enter a front cleaning stage to prepare for ignition and burning. If the water flow is not detected, fault information is output to prompt a user to turn on a water flow switch or perform other treatment measures until the water flow is detected or the gas water heater is turned off.
In addition, in order to simplify the control process, the current of the fan when the fan runs at the second wind speed can be directly compared with the third current threshold, the wind speed of the fan is controlled to be increased according to the preset fourth offset amount under the condition that the current is smaller than the third current threshold, the flowing resistance of the airflow in the gas water heater is small under the condition that the current is larger than or equal to the third current threshold, and the residual air in the gas water heater meets the safety standard, the burner of the gas water heater is controlled to ignite, the comparison process of the current and the second current threshold is reduced, the control strategy is simplified, and the heating response speed of the gas water heater is improved.
Example 7:
as shown in fig. 7, according to an embodiment of the present invention, there is provided a control method of a gas water heater, including:
and step 716, outputting fault information and controlling the gas water heater to be closed.
In this embodiment, the fourth current threshold is the theoretical current corresponding to the maximum blockage level when the wind turbine is operating at different wind speeds. If the detected current is smaller than the fourth current threshold value, the blockage situation of the gas water heater is serious at the moment, effective air supplement and wind resistance are carried out even if the wind speed of the fan is increased, the current safety of the gas water heater is low, fault information is output to warn a user that the blockage degree of the gas water heater is high, the gas water heater is closed in time, and potential safety hazards caused by the fact that the gas water heater continues to operate under the serious blockage situation are prevented.
Further, to the burning stage, after the measuring current is less than the fourth current threshold value, because block up and seriously influence the combustor and carry out normal combustion, if continue to heat, incomplete burning produces carbon monoxide and increases, leads to carbon monoxide to reveal easily, endangers personal safety, then control the gas valve and close to get into the back and clean the stage, close gas heater after the back cleans, thereby cause detonation scheduling problem when avoiding next start gas heater, and then improve the security and the reliability of gas heater work.
Specifically, the manner of outputting the failure information is not limited to voice prompts, display prompts, blinking prompts, and the like.
Example 8:
as shown in fig. 8, according to an embodiment of the present invention, there is provided a control method of a gas water heater, including:
808, controlling a fan to operate according to a first air speed corresponding to the operation stage of the gas water heater;
and 816, controlling the wind speed of the fan to be increased to a second wind speed according to the first offset.
In the embodiment, the gas water heater has a self-learning function, different blocking grades of the gas water heater under different requirements are simulated in a self-learning mode, and current data of multiple groups of fans running at different preset wind speeds are acquired under the condition that different preset blocking grades are collected. And according to the current data corresponding to each preset blockage grade and each preset wind speed, counting multiple groups of current data detected under the condition of the same preset blockage grade and the same preset wind speed to obtain multiple groups of sampling point data. And performing linear fitting on the multiple groups of sampling point data to obtain a parameter corresponding relation. By means of the self-learning mode of the fan of the gas water heater, the current curve of the sampling point of the fan is learned, linear data are fitted, the problem of difference between the fans is solved, and the fan is controlled more accurately.
For example, 5 blockage levels are preset and collected according to the whole operation process of the gas water heater, 5 points are considered to be learned to basically cover the whole blockage situation, wherein 0 level indicates no blockage, 4 levels indicate serious blockage, and the preset wind speed of the fan operation is set to be 8 wind ranges. Specifically, after the gas water heater is powered on, under the conditions of no blockage and normal atmospheric pressure, the gas water heater starts the fan through key operation, the current of the fan under the 1-level wind gear is recorded, the value of the 8 points is used as a group of current data corresponding to the 1-level wind gear under the standard working condition, the operation steps are repeated, multiple groups of current data corresponding to the 1-level wind gear under the standard working condition are obtained, and multiple groups of 8 current data corresponding to the 0-level blockage grade and the 1-level wind gear are used as multiple groups of sampling point data of the 0-level blockage grade and the 1-level wind gear. And taking the average value of the multiple groups of sampling point data as the theoretical current (current threshold value) of 0-level blockage grade and 1-level wind gear. And similarly, counting the current data of each blockage grade and each wind gear to obtain the parameter corresponding relation among the blockage grade, the wind speed and the current threshold value.
Example 9:
as shown in fig. 9, according to an embodiment of the present invention, a method for controlling a gas water heater is provided, including:
step 904, controlling the gas water heater to enter a pre-cleaning stage under the condition of detecting water flow;
step 922, judging whether the ignition failure is accumulated for 8 times, if so, entering step 950, and if not, entering step 906;
step 924, controlling the gas water heater to enter a combustion stage, and controlling the fan to operate according to a first wind speed calculated by the load demand of the combustion stage;
in step 940, whether the fan current is greater than or equal to a second current threshold corresponding to the N-level blockage level is judged, if yes, the step 942 is performed, and if not, the step 944 is performed;
946, if N is greater than 4, if yes, go to 948, if no, go to 930;
In the embodiment, the fan current under the standard working condition (no blockage) combustion, the fan current under the 1-level blockage working condition combustion, the fan current under the 2-level blockage working condition combustion, the fan current under the 3-level blockage working condition combustion and the fan current under the 4-level blockage working condition combustion of each load section of the gas water heater from small to large corresponding to the fan rotating speed are collected. The collected fan current and fan rotating speed data are embedded into software in a two-dimensional array constant form, and as shown in table 1 and fig. 10, a wind blockage matrix is formed, so that linear calculation is facilitated.
When the rotating speed of a fan is stable in the combustion stage, if the current of the fan is smaller than N-level blocking current (a first current threshold), increasing the wind speed of level 1; after the wind speed of level 1 is superposed, judging again when the wind speed is stable, and if the current of the current fan is larger than the blocking current of level N (the second current threshold), reducing the wind speed of level 1. And if the current fan current is smaller than the N + 1-level blocking current (the third current threshold), continuously increasing the 1-level wind speed. With this cycle, if the wind speed increases to a level N >4, a safety alarm is activated.
When the rotating speed of the fan is stable in the previous cleaning stage, if the current of the current fan is smaller than N-level blocking current (a first current threshold value), increasing the wind speed of level 1; after the 1-level wind speed is superposed, judging again when the wind speed is stable, and entering an ignition process if the current of the current fan is greater than the N-level blocking current (a second current threshold value). And if the current fan current is smaller than the N + 1-level blocking current (the third current threshold), continuously increasing the 1-level wind speed. With this cycle, if the wind speed increases to a level N >4, a safety alarm is activated.
Through the control method provided by the embodiment, the blocking of the smoke pipe is divided into a grade concept, and the size of each grade of air supplement is freely controlled. And the current curve of the sampling point of the fan can be learned in a self-learning mode of the fan, linear data are fitted, and the problem of difference between the fans can be solved. Furthermore, a Pulse Width Modulation (PWM) control mode of Proportional Integral Derivative (PID) constant rotating speed is adopted, target wind speeds required by different stages are accurately calculated according to demand loads, sampled fan currents are combined to carry out accurate wind resistance and air supplement treatment, noise, smoke and efficiency are guaranteed to reach the best state, and compared with an AC fan which cannot be adjusted, the gas water heater can prevent airflow backflow under the condition of strong wind, sufficient combustion is guaranteed, hot water is stably supplied, carbon monoxide is guaranteed to be always controlled at a safe level, even if the airflow backflow is serious, a safety alarm device can be accurately identified and started, and user safety is guaranteed.
Example 10:
as shown in fig. 11, according to an embodiment of the second aspect of the present invention, there is provided a gas water heater 1000, comprising: a fan 1002, a memory 1004, and a processor 1006.
In detail, the memory 1004 stores programs or instructions, the processor 1006 is connected with the memory 1004 and the fan 1002, and when the processor 1006 executes the programs or instructions, the control method of the gas water heater according to the embodiment of the first aspect is implemented. Therefore, the gas water heater has all the beneficial effects of the control method of the gas water heater provided by the embodiment of the first aspect, and redundant description is omitted for avoiding repetition.
Further, the gas water heater still includes: the gas burner comprises a combustion chamber, a burner, a gas valve, a gas pipeline and a current detection assembly. Wherein, the fan can adopt a direct current fan. The fan is used for conveying air to the combustor and discharging waste gas generated by the combustor. Specifically, the fan sends air into the combustion chamber of the gas water heater in a lower blowing mode, gas is controlled through the gas valve and is introduced into the combustor through the gas inlet pipeline, the gas is ignited and combusted through the combustor to generate heat, and the heat heats water flowing through the heat exchanger to generate hot water. Under the effect of fan, the waste gas that the burning produced in the combustion chamber is collected by collection petticoat pipe to discharge gas heater through the tobacco pipe, thereby can avoid burning flue gas or remaining harmful gas to stay indoor, guarantee indoor air quality. The current of the fan is monitored in real time through the current detection assembly.
Example 11:
according to an embodiment of the third aspect of the present invention, a readable storage medium is provided, on which a program or instructions are stored, which when executed by a processor, performs the control method of the gas water heater proposed by the embodiment of the first aspect. Therefore, the readable storage medium has all the advantages of the control method for the gas water heater provided by the embodiment of the first aspect, and redundant description is omitted for avoiding repetition.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and include, for example, fixed connections, detachable connections, or integral connections; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A control method of a gas water heater is characterized in that the gas water heater comprises a fan, and the control method comprises the following steps:
controlling the fan to operate according to a first air speed corresponding to the operation stage of the gas water heater;
acquiring the current of the fan;
and adjusting the wind speed of the fan according to the current.
2. The control method of the gas water heater according to claim 1, wherein the adjusting the wind speed of the fan according to the current comprises:
acquiring a parameter corresponding relation among the wind speed of the fan, the blockage grade of the gas water heater and the current threshold of the fan;
determining a first current threshold corresponding to the first wind speed according to the parameter corresponding relation;
and controlling the wind speed of the fan to be increased to a second wind speed according to a first offset amount based on the current being smaller than the first current threshold value.
3. The control method of a gas water heater according to claim 2, further comprising:
determining an N-level blockage grade corresponding to the first current threshold according to the parameter corresponding relation based on the fact that the current is smaller than the first current threshold;
and determining the first offset according to the N-level blockage grade.
4. The control method of the gas water heater according to claim 3, wherein after controlling the wind speed of the fan to rise to the second wind speed according to the first offset, the method further comprises:
determining a second current threshold corresponding to the N-level blockage grade and a third current threshold corresponding to the N + 1-level blockage grade according to the parameter corresponding relation and the second wind speed;
adjusting the wind speed of the fan according to the second current threshold and the third current threshold;
wherein the second current threshold is greater than the third current threshold.
5. The control method of the gas water heater according to claim 4, wherein the adjusting the wind speed of the fan according to the second current threshold and the third current threshold based on the operation phase being a combustion phase comprises:
controlling the wind speed of the fan to be reduced according to a second offset amount based on the current being greater than or equal to the second current threshold value;
and controlling the wind speed of the fan to rise according to a third offset amount based on the current being smaller than the third current threshold value.
6. The control method of the gas water heater according to claim 4, wherein the adjusting the wind speed of the fan according to the second current threshold and the third current threshold based on the operation phase being a pre-sweep phase comprises:
controlling a burner of the gas water heater to ignite based on the current being greater than or equal to the second current threshold;
and controlling the wind speed of the fan to rise according to a fourth offset amount based on the current being smaller than the third current threshold value.
7. The control method of a gas water heater according to any one of claims 2 to 6, further comprising:
determining a fourth current threshold corresponding to the wind speed of the fan according to the parameter corresponding relation;
and outputting fault information based on the fact that the current is smaller than the fourth current threshold, and controlling the gas water heater to be closed.
8. The control method of a gas water heater according to any one of claims 2 to 6, further comprising:
collecting current data of a plurality of groups of fans operating at different preset wind speeds under the condition that the gas water heater is at different preset blockage levels;
generating a plurality of groups of sampling point data according to the current data corresponding to each preset blockage grade and each preset wind speed;
and performing linear fitting on the multiple groups of sampling point data to obtain the corresponding relation of the parameters.
9. A gas water heater, comprising:
a fan;
a memory storing a program or instructions;
a processor connected to the memory and the fan, the processor implementing the control method of the gas water heater according to any one of claims 1 to 8 when executing the program or the instructions.
10. A readable storage medium on which a program or instructions are stored, characterized in that the program or instructions, when executed by a processor, perform a control method of a gas water heater according to any one of claims 1 to 8.
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