CN114017926B - Water heater and control method and control device thereof - Google Patents
Water heater and control method and control device thereof Download PDFInfo
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- CN114017926B CN114017926B CN202111211515.2A CN202111211515A CN114017926B CN 114017926 B CN114017926 B CN 114017926B CN 202111211515 A CN202111211515 A CN 202111211515A CN 114017926 B CN114017926 B CN 114017926B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Abstract
The embodiment of the application provides a water heater and control method and control device thereof, through obtaining the accumulated operating time length of each combustion module, when the accumulated operating time length of the combustion module corresponding to output heat meets preset conditions, the combustion module can be continuously used for working, namely, the long-term heating of the corresponding part caused by long-term use of the combustion module is avoided, the local fatigue of the corresponding part is prevented, and the water leakage phenomenon of the corresponding part on the water heater is further prevented.
Description
Technical Field
The application relates to the technical field of water heaters, in particular to a water heater and a control method and a control device thereof.
Background
In the related art, when the input condition of the water heater is relatively unchanged, the water heater works in the same load section every time. In the process, a certain part of the water heater is in a heating mode for a long time, so that the part is subjected to local fatigue, and the water heater is subjected to local water leakage.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a water heater, a control method and a control device thereof, so as to prevent local water leakage of the water heater.
According to an aspect of the present application, an embodiment of the present application provides a water heater control method, including a plurality of combustion modules, each of the combustion modules having an output heat interval, a plurality of the combustion modules having an upper limit critical value of the output heat interval sequentially increasing, and a plurality of the combustion modules having a lower limit critical value of the output heat interval sequentially increasing, the water heater control method including:
acquiring the output heat of the water heater, and determining the output heat interval matched with the output heat of the water heater to serve as a target output heat interval;
taking a combustion module corresponding to the target output heat interval as a first target combustion module, and determining a first accumulated working time length of the first target combustion module;
determining an output heat interval set adjacent to the target output heat interval and a combustion module corresponding to each output heat interval in the adjacent output heat interval set to obtain a second target combustion module set; determining a second accumulated working time length of each second target combustion module in the second target combustion module set to obtain a second accumulated working time length set;
And if the first accumulated working time length meets a preset condition, determining the first target combustion module as the current combustion module.
In one embodiment, the adjacent set of output heat intervals includes an output heat interval, the second set of target combustion modules includes a second target combustion module corresponding to the output heat interval, and the second set of cumulative operating durations includes a second cumulative operating duration corresponding to the second target combustion module;
the water heater control method further comprises the following steps:
and if the first accumulated working time length does not meet the preset condition, determining the second target combustion module in the second target combustion module set as the current combustion module.
In one embodiment, the adjacent output heat interval sets include two output heat intervals, the second target combustion module set includes two second target combustion modules corresponding to the two output heat intervals one by one, and the second accumulated working time length set includes two second accumulated working time lengths corresponding to the two second target combustion modules one by one;
the water heater control method further comprises the following steps:
If the first accumulated working time length does not meet the preset condition and the two second accumulated working time lengths are not equal, determining a second target combustion module corresponding to the smaller of the two second accumulated working time lengths as a current combustion module;
if the first accumulated working time length does not meet the preset condition and the two second accumulated working time lengths are equal, determining an output heat interval which is closer to the output heat in the two output heat intervals, and taking a second target combustion module corresponding to the closer output heat interval as a current combustion module.
In one embodiment, the water heater control method further includes:
after determining the current combustion module, if the lower limit critical value of the output heat interval of the current combustion module is larger than the output heat of the water heater, reducing the current of the fuel gas proportional valve and/or increasing the water supply flow;
and if the upper limit critical value of the output heat interval of the current combustion module is smaller than the output heat of the water heater, increasing the current of the fuel gas proportional valve and/or reducing the water supply flow.
In one embodiment, the preset condition includes:
The second accumulated working time length in the second accumulated working time length set is not smaller than the first accumulated working time length; or alternatively
The difference value between the first accumulated working time length and the second accumulated working time length in the second accumulated working time length set is within a preset range.
In one embodiment, the water heater further comprises a plurality of heat exchange modules corresponding to the combustion modules one by one, each heat exchange module is provided with a heat exchange heat interval, and the heat exchange heat intervals correspond to the output heat intervals one by one;
the water heater control method further comprises the following steps:
after the current combustion module is determined, a heat exchange module corresponding to the current combustion module is executed.
According to another aspect of the present application, there is provided a control apparatus for a water heater including a plurality of combustion modules each having an output heat zone, the control apparatus for a water heater including:
the acquisition module is used for acquiring the output heat of the water heater and the accumulated working time length of each combustion module;
the comparison module is used for comparing the output heat with a plurality of output heat intervals and comparing the accumulated working time length with preset conditions;
And the determining module is used for determining the current combustion module according to the comparison result of the output heat and the output heat intervals and the comparison result of the accumulated working time length and the preset condition.
In one embodiment, the water heater further comprises a plurality of heat exchange modules corresponding to the combustion modules one by one, each heat exchange module is provided with a heat exchange heat interval, and the heat exchange heat intervals correspond to the output heat intervals one by one;
the determining module is also used for determining a heat exchange module corresponding to the current combustion module.
In one embodiment, the comparison module is further configured to compare the output heat to a lower output heat limit of the current combustion module;
the control device for the water heater further comprises:
and the control module is used for controlling the current of the fuel gas proportional valve and/or the water supply flow according to the comparison result of the output heat and the output heat interval of the current combustion module.
According to yet another aspect of the present application, an embodiment of the present application provides a water heater, including a plurality of combustion modules, and further including the control device for a water heater described above.
According to the water heater, the control method and the control device thereof, the accumulated working time length of each combustion module is obtained, and when the accumulated working time length of the combustion module corresponding to the output heat meets the preset condition, the combustion module can be continuously used for working, namely the phenomenon that the corresponding part is heated for a long time due to long-term use of the combustion module is avoided, the corresponding part is prevented from being partially tired, and then the water leakage phenomenon of the corresponding part on the water heater is prevented.
Drawings
FIG. 1 is a schematic flow chart of a water heater control method according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart of a water heater control method according to another embodiment of the present application;
FIG. 3 is a schematic flow chart of a water heater control method according to another embodiment of the present disclosure;
FIG. 4 is a schematic block diagram of a control device for a water heater according to an embodiment of the present application;
fig. 5 is a schematic block diagram of a water heater according to an embodiment of the present application.
Reference numerals simply denote:
the system comprises a control system 1000, a main controller 1010, an acquisition module 1011, a comparison module 1012, a determination module 1013, a control module 1020, a water inlet temperature sensor 1030, a water outlet temperature sensor 1040, a water flow sensor 1050, a gas system 1060, a fan system 1070, a water quantity adjusting device 1080, a display 1090 and a water pump 1100;
a combustion system 2000, a combustion module 2100;
a heat exchange system 3000 and a heat exchange module 3100.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, a detailed description of embodiments accompanied with figures is provided below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present application. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application. The embodiments of the present application may be implemented in many other ways than those described herein, and similar modifications may be made by those skilled in the art without departing from the spirit of the invention, so that the embodiments of the present application are not limited to the specific embodiments disclosed below.
It will be appreciated that the terms "first," "second," and the like, as used herein, may be used to describe various terms, and are not to be interpreted as indicating or implying a relative importance or an implicit indication of the number of technical features being indicated. However, unless specifically stated otherwise, these terms are not limited by these terms. These terms are only used to distinguish one term from another. For example, the first target combustion module and the second target combustion module are different target combustion modules, and the first cumulative operating time period and the second cumulative operating time period are different cumulative operating time periods without departing from the scope of the present application. In the description of the embodiments of the present application, the meaning of "a plurality", "a number" or "a plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of embodiments of the present application, unless explicitly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediary. Moreover, a first feature being "above," "over" and "on" a second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature level is higher than the second feature level. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature level is less than the second feature level.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In order to facilitate understanding of the technical solutions of the embodiments of the present application, before describing the specific implementation manner of the embodiments of the present application, some technical terms in the technical field to which the embodiments of the present application belong will be first briefly described.
PID control (proportional-integral-derivative control ) forms a control deviation according to a given value and an actual output value, forms a control quantity by linear combination of proportional, integral and derivative of the deviation, and controls a controlled object. Because of the simple structure, strong robustness and adaptability, and the small dependence of the adjustment setting on the specific model of the system, PID control is still the most widely used control method in industrial control.
The main controller automatically distributes the information data of the water inlet temperature, the water flow, the target water outlet temperature and the like to the corresponding combustion modules to work after PID fuzzy operation and executes constant temperature heating according to the target water outlet temperature, and the main controller executes corresponding constant temperature adjustment control through the acquired data information change in the process. In general, when the peripheral information data collected by the main controller is relatively unchanged, the water heater can work in the same load section each time, that is, constant temperature work is performed in the same combustion module. For example, a water heater with 17 liters is purchased by a common household, and only one water consumption point is used at ordinary times, so that most of the water heaters work by utilizing a certain combustion module corresponding to the water consumption point. In an embodiment of the related art, the water heater includes a plurality of combustion modules and heat exchange modules corresponding to the plurality of combustion modules one by one. According to the research of the inventor, in the process, the same combustion module is used for working for a long time, namely, the heat exchange module corresponding to the combustion module is used for working for a long time, so that the part x corresponding to the heat exchanger on the water heater is in a heating mode for a long time. Because the material has the phenomena of thermal expansion and cold contraction, the part x can generate a local fatigue phenomenon due to continuous heating, and the corrosion resistance is reduced. And because the condensed water is generated when the water heater is cooled, sulfide, acid ions and other substances exist in the condensed water, when the condensed water flows through the part x, the part x is easily corroded and perforated, and finally the local water leakage event of the heat exchanger is caused.
An embodiment of the application relates to a water heater, which comprises a plurality of combustion modules and a plurality of heat exchange modules corresponding to the combustion modules one by one. Each combustion module is provided with an output heat interval, the upper limit critical values of the output heat intervals of the plurality of combustion modules are sequentially increased, and the lower limit critical values of the output heat intervals of the plurality of combustion modules are sequentially increased. Correspondingly, each heat exchange module is provided with a heat exchange heat interval, and a plurality of heat exchange heat intervals are in one-to-one correspondence with a plurality of output heat intervals. It can be understood that the upper limit critical values of the heat exchange heat intervals of the plurality of heat exchange modules are sequentially increased, and the lower limit critical values of the heat exchange heat intervals of the plurality of heat exchange modules are sequentially increased. For example, the water heater includes a combustion module A, a combustion module B, a combustion module C, and a combustion module D, wherein the combustion module A, the combustion module B, the combustion module C, and the combustion module D form a combustion system, and the output heat interval of the combustion module A is W A0 ～W A1 The output heat interval of the combustion module B is W B0 ～W B1 The output heat interval of the combustion module C is W C0 ～W C1 The output heat interval of the combustion module D is W D0 ～W D1 . Correspondingly, the water heater also comprises a heat exchange module A ', a heat exchange module B ', a heat exchange module C ', a heat exchange module D ', a heat exchange module A ', and a heat exchange module B ', a heat exchange system is formed by a heat exchange module C' and a heat exchange module D ', and the heat exchange interval of the heat exchange module A' is Q A0 ～Q A1 The heat exchange interval of the heat exchange module B' is Q B0 ～Q B1 The heat exchange interval of the heat exchange module C' is Q C0 ～Q C1 The heat exchange interval of the heat exchange module D' is Q D0 ～Q D1 . Wherein W is A0 、W B0 、W C0 、W D0 、Q A0 、Q B0 、Q C0 、Q D0 For the lower threshold value, W A1 、W B1 、W C1 、W D1 、Q A1 、Q B1 、Q C1 、Q D1 Is an upper threshold. As one embodiment, the relation of the output heat quantity between the combustion modules is W A0 ＜W B0 ＜W A1 ＜W B1 ，W B0 ＜W C0 ＜W B1 ＜W C1 ，W C0 ＜W D0 ＜W C1 ＜W D1 The heat exchange quantity relationship between the heat exchange modules is Q A0 ＜Q B0 ＜Q A1 ＜Q B1 ，Q B0 ＜Q C0 ＜Q B1 ＜Q C1 ，Q C0 ＜Q D0 ＜Q C1 ＜Q D1 . Of course, as another embodiment, the relationship of the output heat quantity between the combustion modules can be W A0 ＜W A1 ＜W B0 ＜W B1 ＜W C0 ＜W C1 ＜W D0 ＜W D1 The heat exchange quantity relation between the heat exchange modules can also be Q A0 ＜Q A1 ＜Q B0 ＜Q B1 ＜Q C0 ＜Q C1 ＜Q D0 ＜Q D1 . The embodiment of the present application is not particularly limited as long as a continuous heat section capable of covering the required output heat can be formed, and the requirement of adjusting the temperature in the water heater can be satisfied. Because the combustion modules and the heat exchange modules are in one-to-one correspondence, i.e. the combustion system and the heat exchange system are also in correspondence, for example, the control device receives the control instruction sent by the control system to control the combustion module A of the combustion system to participate in the work, and the heat exchange module A' is automatically matched to participate inTo work.
It should be noted that, in the one-to-one correspondence between the plurality of first objects and the plurality of second objects, the one-to-one correspondence referred to in the embodiments of the present application refers to that each first object uniquely corresponds to one second object, and the second objects corresponding to different first objects are different. For example, the first objects are a combustion module a, a combustion module B, a combustion module C, and a combustion module D, the second objects are a heat exchange module a ', a heat exchange module B', a heat exchange module C ', and a heat exchange module D', the combustion module a corresponds to the heat exchange module a ', the combustion module B corresponds to the heat exchange module B', the combustion module C corresponds to the heat exchange module C ', and the combustion module D corresponds to the heat exchange module D'. For another example, the second target combustion module set mentioned later includes two second target combustion modules corresponding to two output heat zones one by one, the plurality of first objects are output heat zone 1, output heat zone 2, the plurality of second objects are second target combustion modules 1', second target combustion modules 2', output heat zone 1 corresponds to second target combustion module 1', and output heat zone 2 corresponds to second target combustion module 2'.
FIG. 1 is a schematic flow chart of a water heater control method according to an embodiment of the present application.
As shown in fig. 1, an embodiment of the present application provides a water heater control method, which includes the following steps:
s101, acquiring output heat of a water heater, and determining an output heat interval matched with the output heat of the water heater to serve as a target output heat interval;
specifically, the output heat of the water heater is related to the water outlet temperature of the water heater set by a user, and as mentioned above, the output heat of the water heater can be automatically distributed to the corresponding combustion module to work after PID fuzzy operation according to the information data such as the water inlet temperature, the water flow, the target water outlet temperature and the like, and constant-temperature heating is performed according to the target water outlet temperature. For example, when the temperature information of the water inlet temperature, the water flow and the temperature information set by the user is obtained, the current output heat demand can be obtained through PID fuzzy operation, and then the required combustion energy input can be calculated, namely the required combustion heat of the combustion module can be output. The output heat of the water heater is located within a selected output heat interval, i.e., a target output heat interval.
S102, taking a combustion module corresponding to the target output heat interval as a first target combustion module, and determining a first accumulated working time length of the first target combustion module;
Specifically, a target output heat interval is determined, that is, a combustion module corresponding to the target output heat interval is determined. And each combustion module in the water heater correspondingly calculates the working time in the corresponding combustion module in an accumulated manner, namely the accumulated working time of each combustion module. It should be noted that in some embodiments, each operation of the water heater may cumulatively calculate the operation time of the corresponding combustion module for the next operation of the water heater.
S103, determining an output heat interval set adjacent to the target output heat interval and a combustion module corresponding to each output heat interval in the adjacent output heat interval set to obtain a second target combustion module set; determining a second accumulated working time length of each second target combustion module in the second target combustion module set to obtain a second accumulated working time length set;
specifically, for one output heat interval, there may be two adjacent output heat intervals, and there may also be one adjacent output heat interval. For example, as described above, only one adjacent output heat interval of the combustion module a is the output heat interval of the combustion module B, and two adjacent output heat intervals of the output heat interval of the combustion module B are the output heat interval of the combustion module a and the output heat interval of the combustion module C. That is, the adjacent set of output heat intervals includes one output heat interval or two output heat intervals. Correspondingly, the second target combustion module set comprises a second target combustion module or two second target combustion modules, and the second accumulated working time length set comprises a second accumulated working time length or two second accumulated working time lengths.
S104, if the first accumulated working time length meets the preset condition, determining the first target combustion module as the current combustion module.
Specifically, in some embodiments, the preset condition includes that none of the second cumulative operating periods in the second cumulative operating period set is smaller than the first cumulative operating period. That is, if the second set of accumulated operating durations includes a second accumulated operating duration, and the first accumulated operating duration is not greater than the second accumulated operating duration, the first target combustion module is determined to be the current combustion module. If the second accumulated working time length set comprises two second accumulated working time lengths, and neither of the two second accumulated working time lengths is smaller than the first accumulated working time length, the first target combustion module is determined to be the current combustion module.
In other embodiments, the preset condition includes that a difference between the first accumulated operating time period and a second accumulated operating time period in the second accumulated operating time period set is within a preset range. That is, within the preset range, the combustion modules corresponding to the adjacent output heat intervals may be considered to be at the same level, and at this time, the first target combustion module may be confirmed as the current combustion module. For example, when the accumulated working time difference of each combustion module corresponding to the adjacent output heat interval is equal to or less than 3600 seconds, the accumulated working time difference is considered to be at the same level, and when the accumulated working time difference is equal to or less than 3600 seconds, the accumulated working time difference is preferentially matched with the combustion module originally used corresponding to the output heat of the water heater to participate in the combustion work; when Δt is greater than 3600 seconds, it will match other combustion modules to operate. For example, the cumulative operating time of the combustion module A is T 1 The accumulated working time length of the combustion module B is T 2 The accumulated working time length of the combustion module C is T 3 The accumulated working time length of the combustion module D is T 4 The cumulative operating time may be calculated in seconds or minutes or hours. The combustion module B is required to participate in the work after the PID operation, but at the moment T 2 Respectively adjacent T 1 T is as follows 3 The difference delta T is larger than 3600 seconds, and the adjacent combustion modules which are closer to each other are automatically selected to participate in the work according to the current output heat demand. In addition, as one embodiment, for convenienceThe combustion modules are allocated and controlled, so that the adjacent combustion modules can be matched for use, and the intermittent use can not occur. Of course, other preset conditions may be used as a judgment rule to select a corresponding combustion module for working, so long as the use requirement can be met and the water heater is prevented from generating local fatigue, and the embodiment of the application is not particularly limited.
Therefore, by acquiring the accumulated working time length of each combustion module, when the accumulated working time length of the combustion module corresponding to the output heat meets the preset condition, the combustion module can be continuously used for working, namely, the phenomenon that the corresponding part is heated for a long time due to long-term use of the combustion module is avoided, the corresponding part is prevented from being partially tired, and the water leakage phenomenon of the corresponding part on the water heater is further prevented.
FIG. 2 is a schematic flow chart of a water heater control method according to another embodiment of the present application.
As shown in fig. 2, an embodiment of the present application provides a water heater control method, which includes the following steps:
s201, acquiring output heat of a water heater, and determining an output heat interval matched with the output heat of the water heater as a target output heat interval;
in particular, reference may be made to the content of some of the foregoing embodiments, which are not repeated here.
S202, taking a combustion module corresponding to a target output heat interval as a first target combustion module, and determining a first accumulated working time length of the first target combustion module;
in particular, reference may be made to the content of some of the foregoing embodiments, which are not repeated here.
S203, determining an output heat interval set adjacent to the target output heat interval and a combustion module corresponding to each output heat interval in the adjacent output heat interval set to obtain a second target combustion module set; determining a second accumulated working time length of each second target combustion module in the second target combustion module set to obtain a second accumulated working time length set;
in particular, reference may be made to the content of some of the foregoing embodiments, which are not repeated here.
S204, if the first accumulated working time length meets the preset condition, determining the first target combustion module as the current combustion module;
in particular, reference may be made to the content of some of the foregoing embodiments, which are not repeated here.
S205, if the first accumulated working time length does not meet the preset condition, determining the second target combustion module in the second target combustion module set as a current combustion module; the adjacent output heat interval set comprises an output heat interval, the second target combustion module set comprises a second target combustion module corresponding to the output heat interval, and the second accumulated working time length set comprises a second accumulated working time length corresponding to the second target combustion module.
Specifically, in some embodiments, the preset condition includes that none of the second cumulative operating periods in the second cumulative operating period set is smaller than the first cumulative operating period. That is, if the first accumulated operating time period is longer than the second accumulated operating time period, the second target combustion module is determined as the current combustion module.
In other embodiments, the preset condition includes that a difference between the first accumulated operating time period and a second accumulated operating time period in the second accumulated operating time period set is within a preset range. That is, if the difference between the first accumulated operating time period and the second accumulated operating time period is not the same, the second target combustion module is determined as the current combustion module. For specific content of the preset condition, reference may also be made to the content in the foregoing embodiments, which is not described herein.
Fig. 3 shows a schematic flow chart of a water heater control method according to another embodiment of the present application.
As shown in fig. 3, an embodiment of the present application provides a water heater control method, which includes the following steps:
s301, acquiring output heat of a water heater, and determining an output heat interval matched with the output heat of the water heater to serve as a target output heat interval;
in particular, reference may be made to the content of some of the foregoing embodiments, which are not repeated here.
S302, taking a combustion module corresponding to the target output heat interval as a first target combustion module, and determining a first accumulated working time length of the first target combustion module;
in particular, reference may be made to the content of some of the foregoing embodiments, which are not repeated here.
S303, determining an output heat interval set adjacent to the target output heat interval and a combustion module corresponding to each output heat interval in the adjacent output heat interval set to obtain a second target combustion module set; determining a second accumulated working time length of each second target combustion module in the second target combustion module set to obtain a second accumulated working time length set;
in particular, reference may be made to the content of some of the foregoing embodiments, which are not repeated here.
S304, if the first accumulated working time length meets the preset condition, determining the first target combustion module as the current combustion module;
in particular, reference may be made to the content of some of the foregoing embodiments, which are not repeated here.
S305, if the first accumulated working time length does not meet the preset condition and the two second accumulated working time lengths are not equal, determining a second target combustion module corresponding to the smaller of the two second accumulated working time lengths as a current combustion module; the second target combustion module set comprises two second target combustion modules corresponding to the two output heat intervals one by one, and the second accumulated working time length set comprises two second accumulated working time lengths corresponding to the two second target combustion modules one by one;
specifically, when the two second target combustion modules need to be allocated, the combustion module with the shorter accumulated working time period is preferentially selected to work. For example, the adjacent set of output heat intervals includes an output heat interval 1 and an output heat interval 2, the second set of target combustion modules includes a second target combustion module 1 'corresponding to the output heat interval 1, and a second target combustion module 2' corresponding to the output heat interval 2, the second set of cumulative operating durations includes a second cumulative operating duration 1″ corresponding to the second target combustion module 1', and a second cumulative operating duration 2″ corresponding to the second target combustion module 2', and the preset condition is in the manner mentioned in the foregoing embodiments. If the first accumulated working time length does not meet the preset condition and the second accumulated working time length 1' is smaller than the second accumulated working time length 2', determining the second target combustion module 1' as the current combustion module. If the first accumulated working time length does not meet the preset condition and the second accumulated working time length 1' is greater than the second accumulated working time length 2', determining the second target combustion module 2' as the current combustion module. That is, the second target combustion module corresponding to the smaller of the two second cumulative operating periods is taken as the current combustion module.
S306, if the first accumulated working time length does not meet the preset condition and the two second accumulated working time lengths are equal, determining an output heat interval which is closer to the output heat in the two output heat intervals, and taking a second target combustion module corresponding to the closer output heat interval as a current combustion module; the second target combustion module set comprises two second target combustion modules corresponding to the two output heat intervals one by one, and the second accumulated working time length set comprises two second accumulated working time lengths corresponding to the two second target combustion modules one by one.
Specifically, when the two second target combustion modules need to be deployed, and the cumulative operation time of the two second target combustion modules is equal, the combustion module operation closer to the output heat is preferentially selected. For example, if the first accumulated working time period does not meet the preset condition and the second accumulated working time period 1 "is equal to the second accumulated working time period 2", determining an output heat interval closer to the output heat in the adjacent output heat interval set, and taking a second target combustion module corresponding to the closer output heat interval as the current combustion module.
In some embodiments, after determining the current combustion module, if the lower limit threshold of the output heat interval of the current combustion module is greater than the output heat of the water heater, reducing the gas proportional valve current and/or increasing the water supply flow; if the upper limit critical value of the output heat interval of the current combustion module is smaller than the output heat of the water heater, the current of the fuel gas proportional valve is increased and/or the water supply flow is reduced. That is, the gas proportional valve current can be adjusted on the premise of ensuring stable combustion, or the water supply flow can be adjusted under the condition of ensuring that the target water outlet temperature is unchanged. Of course, the current of the fuel gas proportional valve and the water supply flow rate can be adjusted at the same time, so long as the output heat of the water heater can be satisfied, and the embodiment of the application is not particularly limited.
In some embodiments, after determining the current combustion module, a heat exchange module corresponding to the current combustion module is executed. Therefore, different heat exchange modules can uniformly participate in the work, and the occurrence of local water leakage events of the water heater is reduced.
In general, under the premise of guaranteeing the target outlet water temperature, the control method provided by the embodiment of the application can allocate the next participation work according to the accumulated working time of each combustion module, and after balanced allocation, different heat exchange modules can uniformly participate in the work, so that the phenomenon that the heat exchanger is partially tired due to the fact that one heat exchange module is in a working state for a long time is avoided, corrosion is caused, the service life of the heat exchange module can be effectively prolonged, and finally the service life of the water heater can be effectively prolonged.
It should be understood that, although the steps in the flowcharts of fig. 1 to 3 are sequentially shown as indicated by arrows, the steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least a portion of the steps of fig. 1-3 may include steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor does the order in which the steps or stages are performed necessarily occur sequentially, but may be performed alternately or alternately with other steps or at least a portion of the steps or stages in other steps.
It should be noted that, in the actual implementation process, the technical solutions described above may be implemented as independent embodiments, or may be implemented as combined embodiments by combining them. In addition, in describing the foregoing embodiments of the present invention, the different embodiments are described in a corresponding order, such as in a data flow direction order, based on a concept that is merely convenient for describing the embodiments, and not limiting the execution order between the different embodiments. Accordingly, in an actual implementation, if multiple embodiments provided by the present invention are required to be implemented, the execution sequence provided when the embodiments are set forth according to the present invention is not necessarily required, but the execution sequence between different embodiments may be arranged according to the requirement.
Fig. 4 is a schematic block diagram showing the structure of a control device for a water heater according to an embodiment of the present application.
Based on the same inventive concept, as shown in fig. 4, the embodiment of the application also provides a control device for a water heater. The water heater comprises a plurality of combustion modules 2100 and a plurality of heat exchange modules 3100 corresponding to the combustion modules 2100 one by one, each combustion module 2100 is provided with an output heat section, each heat exchange module 3100 is provided with a heat exchange heat section, and the heat exchange heat sections are corresponding to the output heat sections one by one. The control device for the water heater comprises an acquisition module 1011, a comparison module 1012, a determination module 1013 and a control module 1020.
The acquisition module 1011 is used to acquire the output heat of the water heater and the accumulated operating time of each combustion module 2100.
The comparison module 1012 is used for comparing the output heat with a plurality of output heat intervals and comparing the accumulated working time length with preset conditions. In some embodiments, the comparison module 1012 also serves to compare the output heat to a lower output heat limit of the current combustion module 2100.
The determining module 1013 is configured to determine the current combustion module 2100 according to a comparison result of the output heat and the plurality of output heat intervals, and a comparison result of the accumulated operating time length and the preset condition. In some embodiments, the determination module 1013 is further configured to determine a heat exchange module 3100 corresponding to the current combustion module 2100.
The control module 1020 is configured to control the fuel gas proportional valve current and/or the water supply flow according to a comparison of the output heat and the output heat interval of the current combustion module 2100.
Based on the same inventive concept, the embodiments of the present application also provide a water heater, including a plurality of combustion modules 2100 and the aforementioned control device for the water heater, by which the use of the combustion modules 2100 is allocated. In some embodiments, the water heater further includes a plurality of heat exchange modules 3100 corresponding to the plurality of combustion modules 2100 one to one, and when the control device deploys the combustion modules 2100 for use, the heat exchange modules 3100 corresponding to the combustion modules 2100 will participate in operation correspondingly.
In particular to some embodiments, as shown in FIG. 5, a control system 1000, a combustion system 2000, and a heat exchange system 3000 are included within the water heater. The control system 1000 includes a main controller 1010, a control module 1020, a water inlet temperature sensor 1030, a water outlet temperature sensor 1040, a water flow sensor 1050, a gas system 1060, a fan system 1070, a water volume regulator 1080, a display 1090 and a water pump 1100, wherein the main controller 1010 is electrically connected with the control module 1020, the water inlet temperature sensor 1030, the water outlet temperature sensor 1040, the water flow sensor 1050, the gas system 1060, the fan system 1070, the water volume regulator 1080, the display 1090 and the water pump 1100. The combustion system 2000 includes a plurality of combustion modules 2100, and the heat exchanging system 3000 includes a plurality of heat exchanging modules 3100 corresponding to the plurality of combustion modules 2100 one by one. The control module 1020 controls the combustion module 2100 to operate on demand, while the combustion module 2100 cooperates with the heat exchange module 3100 to meet different hot water outputs. It should be noted that, the acquisition module 1011, the comparison module 1012, and the determination module 1013 in the foregoing embodiments may be integrated into the main controller 1010.
In summary, in the embodiment of the present application, by obtaining the accumulated working durations of different combustion modules, the main controller adjusts the combustion module that participates in the work next time by monitoring the different working durations. When a combustion module is deployed to operate but its combustion energy is not satisfactory, the main controller may deploy its attached peripheral components (e.g., combustion proportioning valves, etc.) to help achieve the combustion energy demand. Thereby avoiding the local fatigue of a certain part of the water heater caused by long-term heating mode, further preventing the water heater from leaking locally and prolonging the service life of the water heater.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A water heater control method, the water heater including a plurality of combustion modules, each of the combustion modules having an output heat interval, upper limit critical values of the output heat intervals of the plurality of combustion modules being sequentially increased, and lower limit critical values of the output heat intervals of the plurality of combustion modules being sequentially increased, the water heater control method comprising:
acquiring the output heat of the water heater, and determining the output heat interval matched with the output heat of the water heater to serve as a target output heat interval;
taking a combustion module corresponding to the target output heat interval as a first target combustion module, and determining a first accumulated working time length of the first target combustion module;
determining an output heat interval set adjacent to the target output heat interval and a combustion module corresponding to each output heat interval in the adjacent output heat interval set to obtain a second target combustion module set; determining a second accumulated working time length of each second target combustion module in the second target combustion module set to obtain a second accumulated working time length set;
If the first accumulated working time length meets a preset condition, determining the first target combustion module as a current combustion module; the preset condition includes that the second accumulated working time length in the second accumulated working time length set is not smaller than the first accumulated working time length, or the difference value between the first accumulated working time length and the second accumulated working time length in the second accumulated working time length set is within a preset range.
2. The water heater control method of claim 1, wherein the set of adjacent output heat intervals includes an output heat interval, the set of second target combustion modules includes a second target combustion module corresponding to the output heat interval, and the set of second cumulative operating durations includes a second cumulative operating duration corresponding to the second target combustion module;
the water heater control method further comprises the following steps:
and if the first accumulated working time length does not meet the preset condition, determining the second target combustion module in the second target combustion module set as the current combustion module.
3. The water heater control method according to claim 1, wherein the adjacent set of output heat intervals includes two output heat intervals, the second set of target combustion modules includes two second target combustion modules corresponding to the two output heat intervals one to one, and the second set of cumulative operating durations includes two second cumulative operating durations corresponding to the two second target combustion modules one to one;
The water heater control method further comprises the following steps:
if the first accumulated working time length does not meet the preset condition and the two second accumulated working time lengths are not equal, determining a second target combustion module corresponding to the smaller of the two second accumulated working time lengths as a current combustion module;
if the first accumulated working time length does not meet the preset condition and the two second accumulated working time lengths are equal, determining an output heat interval which is closer to the output heat in the two output heat intervals, and taking a second target combustion module corresponding to the closer output heat interval as a current combustion module.
4. A water heater control method according to claim 2 or 3, further comprising:
after determining the current combustion module, if the lower limit critical value of the output heat interval of the current combustion module is larger than the output heat of the water heater, reducing the current of the fuel gas proportional valve and/or increasing the water supply flow;
and if the upper limit critical value of the output heat interval of the current combustion module is smaller than the output heat of the water heater, increasing the current of the fuel gas proportional valve and/or reducing the water supply flow.
5. A water heater control method according to any one of claims 1 to 3, wherein the water heater further comprises a plurality of heat exchange modules in one-to-one correspondence with a plurality of the combustion modules, each of the heat exchange modules having a heat exchange heat zone, the plurality of heat exchange heat zones being in one-to-one correspondence with a plurality of the output heat zones;
the water heater control method further comprises the following steps:
after the current combustion module is determined, a heat exchange module corresponding to the current combustion module is executed.
6. A control apparatus for a water heater, the water heater including a plurality of combustion modules, each of the combustion modules having an output heat interval, upper limit critical values of the output heat intervals of the plurality of combustion modules being sequentially increased, and lower limit critical values of the output heat intervals of the plurality of combustion modules being sequentially increased, the control apparatus comprising:
the acquisition module is used for acquiring the output heat of the water heater and the accumulated working time length of each combustion module;
the comparison module is used for comparing the output heat with a plurality of output heat intervals and comparing the accumulated working time length with preset conditions; a kind of electronic device with high-pressure air-conditioning system
The determining module is used for determining a current combustion module according to the comparison result of the output heat and a plurality of output heat intervals and the comparison result of the accumulated working time length and the preset condition;
the output heat interval matched with the output heat of the water heater is a target output heat interval, and the combustion module corresponding to the target output heat interval is a first target combustion module; the output heat interval set adjacent to the target output heat interval is an adjacent output heat interval set, and the combustion module corresponding to each output heat interval in the adjacent output heat interval set is a second target combustion module;
the accumulated working time comprises a first accumulated working time and a second accumulated working time; the first accumulated working time length is the accumulated working time length of the first target combustion module, the second accumulated working time length is the accumulated working time length of the second target combustion module, and the second accumulated working time lengths corresponding to all the second target combustion modules form a second accumulated working time length set;
the preset condition includes that the second accumulated working time length in the second accumulated working time length set is not smaller than the first accumulated working time length, or the difference value between the first accumulated working time length and the second accumulated working time length in the second accumulated working time length set is within a preset range.
7. The control device for a water heater as recited in claim 6, wherein the comparison module is further configured to compare the output heat of the water heater to a lower output heat limit of the current combustion module.
8. The control device for a water heater according to claim 6, wherein the water heater further comprises a plurality of heat exchanging modules in one-to-one correspondence with the plurality of combustion modules, each of the heat exchanging modules having a heat exchanging heat zone, the plurality of heat exchanging heat zones being in one-to-one correspondence with the plurality of output heat zones;
the determining module is also used for determining a heat exchange module corresponding to the current combustion module.
9. The control device for a water heater according to claim 6, wherein the comparison module is further configured to compare the output heat to a lower output heat limit of the current combustion module;
the control device for the water heater further comprises:
and the control module is used for controlling the current of the fuel gas proportional valve and/or the water supply flow according to the comparison result of the output heat and the output heat interval of the current combustion module.
10. A water heater comprising a plurality of combustion modules, further comprising a control device for a water heater as claimed in any one of claims 6 to 9.
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| CN111912120A (en) * | 2020-08-11 | 2020-11-10 | 宁波方太厨具有限公司 | Method, system, equipment and medium for controlling zero cold water in gas water heater |
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| JPH11294761A (en) * | 1998-04-16 | 1999-10-29 | Rinnai Corp | Combustor |
| JP4424554B2 (en) * | 2008-03-04 | 2010-03-03 | リンナイ株式会社 | Hot water storage water heater |
| CN207247579U (en) * | 2017-09-12 | 2018-04-17 | 邓延鸿 | A kind of modular Hot water units intelligence control system |
| JP2020085337A (en) * | 2018-11-26 | 2020-06-04 | 株式会社ノーリツ | Hot water supply system and auxiliary heat source machine |
| CN110131895B (en) * | 2019-05-27 | 2023-07-25 | 珠海格力电器股份有限公司 | Combustion device, wall-mounted furnace and sectional combustion control method |
| CN111692610A (en) * | 2020-06-17 | 2020-09-22 | 珠海格力电器股份有限公司 | Fan control method, heat exchange structure and gas water heater |
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| CN111609547A (en) * | 2020-05-18 | 2020-09-01 | 海信(广东)厨卫系统有限公司 | Gas water heater and control method thereof |
| CN111912120A (en) * | 2020-08-11 | 2020-11-10 | 宁波方太厨具有限公司 | Method, system, equipment and medium for controlling zero cold water in gas water heater |
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