CN111189228A - Control method of gas water heater and gas water heater - Google Patents
Control method of gas water heater and gas water heater Download PDFInfo
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- CN111189228A CN111189228A CN201811353990.1A CN201811353990A CN111189228A CN 111189228 A CN111189228 A CN 111189228A CN 201811353990 A CN201811353990 A CN 201811353990A CN 111189228 A CN111189228 A CN 111189228A
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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 discloses a control method of a gas water heater and the gas water heater. The control method of the gas water heater comprises the following steps: acquiring a corrected hot water yield according to an automatic sampling instruction of the gas water heater, wherein the corrected hot water yield is determined by the water inlet temperature, the water outlet temperature and the water flow rate of the gas water heater; and calculating the difference value between the current hot water yield of the gas water heater and the corrected hot water yield of the gas water heater, and controlling the working state and the alarm state of the gas water heater according to the difference value. The control method can improve the control precision of the gas water heater, can ensure that the gas water heater burns more fully, generates less waste gas, and can inform a user of paying attention to the working condition of the gas water heater in time when the gas water heater works abnormally.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a control method of a gas water heater and the gas water heater.
Background
In the related art, the gas water heater uses gas as fuel, and the combustion heat required by the gas water heater during water supply is controlled by controlling the gas flow introduced into the gas water heater. Because the sources of the gas supplied to the gas water heater are biased to be diversified, and the component difference of the gas is larger, the technical problems of incomplete combustion of the gas water heater, vibration combustion, high exhaust emission rate and the like are easily caused, and when the gas water heater works abnormally, a user cannot be timely and accurately informed of the working state of the gas water heater. Meanwhile, structural elements of a plurality of gas water heaters of the same type have small differences, so that working data detected by the gas water heaters have differences, and therefore the control accuracy of the gas water heaters in the related art is poor.
Disclosure of Invention
The embodiment of the invention provides a control method of a gas water heater and the gas water heater.
The control method of the gas water heater of the embodiment of the invention comprises the following steps:
acquiring a corrected hot water yield according to the automatic sampling instruction of the gas water heater, wherein the corrected hot water yield is determined by the water inlet temperature, the water outlet temperature and the water flow rate of the gas water heater;
determining the current hot water yield of the gas water heater according to the current water inlet temperature of the gas water heater, the current water outlet temperature of the gas water heater and the current water flow rate of the gas water heater; and
and calculating a difference value between the current hot water yield of the gas water heater and the corrected hot water yield of the gas water heater, and controlling the working state and the alarm state of the gas water heater according to the difference value.
According to the control method of the gas water heater, the corrected hot water yield can be obtained according to the automatic sampling instruction of the gas water heater, the working state and the alarm state of the gas water heater can be controlled according to the difference value between the current hot water yield of the gas water heater and the corrected hot water yield of the gas water heater, the control precision of the gas water heater can be improved, the gas water heater can be fully combusted, the heat production efficiency is high, the generated waste gas amount is small, the running safety is high, meanwhile, a user can be timely notified to pay attention to the working condition of the gas water heater when the gas water heater works abnormally, and the user experience is good.
In some embodiments, calculating a difference between a current hot water yield of the gas water heater and a corrected hot water yield of the gas water heater, and controlling an operating state and an alarm state of the gas water heater according to the difference comprises:
judging whether the absolute value of the difference value is larger than a first preset value or not;
when the absolute value of the difference is larger than the first preset value, controlling the gas water heater to stop running and/or sending first alarm information of the gas water heater to stop running;
and when the absolute value of the difference is smaller than or equal to the first preset value, controlling the gas water heater to operate.
In some embodiments, when the absolute value of the difference is less than or equal to the first preset value, controlling the gas water heater to operate includes:
judging whether the absolute value of the difference value is greater than or equal to a second preset value or not;
when the absolute value of the difference is larger than or equal to the second preset value, controlling the gas water heater to send out second alarm information of abnormal operation of the gas water heater;
and when the absolute value of the difference is smaller than the second preset value, controlling the gas water heater not to send out the second alarm information.
In some embodiments, determining the current hot water production rate of the gas water heater from the current inlet water temperature of the gas water heater, the current outlet water temperature of the gas water heater, and the current water flow rate of the gas water heater comprises:
calculating the temperature difference between the current water inlet temperature of the gas water heater and the current water outlet temperature of the gas water heater;
and calculating the product of the temperature difference and the current water flow rate of the gas water heater to obtain the current hot water yield of the gas water heater.
The embodiment of the invention also provides a gas water heater, which comprises a control unit, wherein the control unit is used for:
acquiring a corrected hot water yield according to an automatic sampling instruction of the gas water heater, wherein the corrected hot water yield is determined by the water inlet temperature, the water outlet temperature and the water flow rate of the gas water heater;
determining the current hot water yield of the gas water heater according to the current water inlet temperature of the gas water heater, the current water outlet temperature of the gas water heater and the current water flow rate of the gas water heater; and
and calculating a difference value between the current hot water yield of the gas water heater and the corrected hot water yield of the gas water heater, and controlling the working state and the alarm state of the gas water heater according to the difference value.
The gas water heater can acquire the corrected hot water yield according to the automatic sampling instruction of the gas water heater, and control the working state and the alarm state of the gas water heater according to the difference value of the current hot water yield of the gas water heater and the corrected hot water yield of the gas water heater, so that the control precision of the gas water heater can be improved, the gas water heater can burn more fully, the heat production efficiency is high, the generated waste gas quantity is less, the running safety is high, meanwhile, a user can be timely informed to pay attention to the working condition of the gas water heater when the gas water heater works abnormally, and the user experience is good.
In certain embodiments, the control unit is configured to:
judging whether the absolute value of the difference value is larger than a first preset value or not;
when the absolute value of the difference is larger than the first preset value, controlling the gas water heater to stop running and/or sending first alarm information of the gas water heater to stop running;
and when the absolute value of the difference is smaller than or equal to the first preset value, controlling the gas water heater to operate.
In certain embodiments, the control unit is configured to:
judging whether the absolute value of the difference value is greater than or equal to a second preset value or not;
and when the absolute value of the difference is greater than or equal to the second preset value, controlling the gas water heater to send out second alarm information of abnormal operation of the gas water heater.
In certain embodiments, the control unit is configured to:
calculating the temperature difference between the current water inlet temperature of the gas water heater and the current water outlet temperature of the gas;
and calculating the product of the temperature difference and the current water flow rate of the gas water heater to obtain the current hot water yield of the gas water heater.
Additional aspects and advantages of embodiments 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 embodiments 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 is a flowchart of a method for controlling a gas water heater according to an embodiment of the present invention.
FIG. 2 is a block schematic diagram of a gas water heater of an embodiment of the present invention.
Fig. 3 is a flowchart of the automatic sampling program operation of the gas water heater according to the embodiment of the present invention.
FIG. 4 is a graph of opening of a gas proportional valve versus hot water production rate for a prior art gas water heater.
Fig. 5 is a graph showing the relationship between the opening degree of the gas proportional valve and the hot water production rate of the gas water heater according to the prior art and the relationship between the opening degree of the gas proportional valve and the hot water production rate of the gas water heater according to the embodiment of the present invention.
Fig. 6 is a graph showing another relationship between the opening degree of the gas proportional valve and the hot water production rate of the gas water heater according to the prior art and another relationship between the opening degree of the gas proportional valve and the hot water production rate of the gas water heater according to the embodiment of the present invention.
Fig. 7 is another flowchart of a control method of a gas water heater according to an embodiment of the present invention.
Fig. 8 is still another flowchart of the control method of the gas water heater according to the embodiment of the present invention.
Fig. 9 is still another flowchart of the control method of the gas water heater according to the embodiment of the present invention.
Fig. 10 is still another flowchart of the control method of the gas water heater according to the embodiment of the present invention.
Fig. 11 is a graph showing the relationship between the opening degree of the gas proportional valve and the hot water production rate in the gas water heater according to the embodiment of the present invention.
Fig. 12 is another graph showing the relationship between the opening degree of the gas proportional valve and the hot water production rate in the gas water heater according to the embodiment of the present invention.
Description of the main element symbols:
the water heater comprises a gas water heater 100, a control unit 10, a water temperature detection unit 30, a water flow rate detection unit 40, a water supply unit 50, a gas unit 60, an alarm unit 70 and an input unit 80.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of embodiments of the invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, embodiments of the invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.
Referring to fig. 1 and fig. 2 together, the method for controlling the gas water heater 100 according to the embodiment of the present invention can be implemented by the gas water heater 100 according to the embodiment of the present invention, and the method for controlling the gas water heater 100 includes:
step S10, acquiring a corrected hot water yield according to the automatic sampling instruction of the gas water heater 100;
step S30, determining the current hot water yield of the gas water heater 100 according to the current water inlet temperature of the gas water heater 100, the current water outlet temperature of the gas water heater 100 and the current water flow rate of the gas water heater 100; and
and step S40, calculating the difference between the current hot water yield of the gas water heater 100 and the corrected hot water yield of the gas water heater 100, and controlling the working state and the alarm state of the gas water heater 100 according to the difference.
The gas water heater 100 according to the embodiment of the present invention includes a control unit 10, a water temperature detection unit 30, a water flow rate detection unit 40, a water supply unit 50, and a gas unit 60. The water temperature detecting unit 30 is used for detecting the inlet water temperature and the outlet water temperature of the gas water heater 100. The water flow rate detection unit 40 is used to detect the water flow rate of the gas water heater 100. The water supply unit 50 is used to control the input of cold water and the output of hot water to the gas water heater 100. The gas unit 60 is used to control the input of gas. The gas unit 60 is disposed in a gas pipe of the gas water heater 100, and the gas unit 60 may be a solenoid valve or a proportional valve. The gas unit 60 can control the opening degree of the gas proportional valve of the gas water heater 100, that is, the flow rate of the gas is controlled, and the larger the opening degree of the gas proportional valve is, the larger the flow rate of the gas introduced into the gas water heater 100 is.
The steps 10, S30, and S40 of the method for controlling the gas water heater 100 according to the embodiment of the present invention can be implemented by the control unit 10. That is, the control unit 10 is configured to obtain the corrected hot water yield according to the automatic sampling instruction of the gas water heater 100; determining the current hot water yield of the gas water heater 100 according to the current water inlet temperature of the gas water heater 100, the current water outlet temperature of the gas water heater 100 and the current water flow rate of the gas water heater 100; and calculating a difference value between the current hot water yield of the gas water heater 100 and the corrected hot water yield of the gas water heater 100, and controlling the working state and the alarm state of the gas water heater 100 according to the difference value. Wherein the corrected hot water yield is determined by the inlet water temperature, outlet water temperature and water flow rate of the gas water heater 100.
According to the control method of the gas water heater 100 and the gas water heater 100, the corrected hot water yield of the gas water heater 100 can be obtained, and the working state and the alarm state of the gas water heater 100 can be controlled according to the difference value between the current hot water yield of the gas water heater 100 and the corrected hot water yield of the gas water heater 100, so that the control precision of the gas water heater 100 can be improved, the gas water heater 100 can be combusted more fully, the heat production efficiency is high, the generated waste gas amount is small, the operation safety is high, meanwhile, when the gas water heater 100 works abnormally, a user can be informed of paying attention to the working condition of the gas water heater 100 in time, and the user experience is good.
Referring to fig. 2 and 3, the gas water heater 100 further includes an input unit 80, the input unit 80 is capable of starting the automatic sampling program of the gas water heater 100, the control unit 10 is capable of controlling the opening P of the gas proportional valve of the gas water heater 100 according to the automatic sampling instruction of the gas water heater 100, detecting the temperature difference T between the inlet water temperature T1 and the outlet water temperature T2 of the gas water heater 100 and the water flow rate Qw, and establishing the data functional relationship Co _ n ═ f (T, Qw) of the corrected hot water yield of the gas water heater 100, thereby obtaining the corrected hot water yield Co _ n of the gas water heater 100, and finally, the automatic sampling program is ended.
It should be noted that part or all of the functions of the control unit 10 according to the embodiment of the present invention may be implemented by a controller or a processor, or a control panel, or a computer board, or a main control board of the gas water heater 100 itself, or the control unit 10 is made into a separate control box or a control terminal including the controller, the processor, the control panel, or the computer board or the main control board, and is installed on the gas water heater 100, or is located at another position outside the gas water heater 100, and the control unit 10 may perform wired or wireless communication with the gas water heater 100.
Specifically, in the prior art, the standard hot water yield of the gas water heater of the same model is the same, the standard hot water yield Co of the gas water heater can be understood as the hot water yield of the gas water heater detected in the case of using the standard gas for gas combustion, please refer to fig. 4, the opening degree of the gas proportional valve and the standard hot water yield of the gas water heater 100 are in a one-to-one correspondence relationship, and the straight line L1(Po) represents the standard hot water yield of the gas water heater obtained under different opening degrees of the gas proportional valve, for example, the standard hot water yield of the gas water heater corresponding to the opening degree value Po of the predetermined gas proportional valve is Co. That is, when the gas water heaters of the same type are shipped, the gas water heaters work according to the relation curve between the opening degree of the gas proportional valve and the standard hot water yield of fig. 4.
However, because the data detected by the water inlet temperature detection device, the water outlet temperature detection device and the water flow rate detection device of each gas water heater have differences, the standard hot water yield corresponding to each gas water heater under the same opening degree of the gas proportional valve has differences, so that a large error exists when the standard hot water yield is used for calculation, and the control precision of the gas water heater is low.
Therefore, in the present embodiment, the automatic sampling program installed on each gas water heater 100 may be started, and the gas water heater 100 may obtain a plurality of data sets of the gas water heater 100 according to the automatic sampling instruction of the gas water heater 100, and determine the corrected hot water yield of the gas water heater 100 according to the plurality of data sets. That is, each gas water heater 100 corresponds to a corrected hot water yield, and the hot water yield based on the corrected hot water yield is used for performing data calculation, so that the control accuracy of the gas water heater 100 can be improved.
The corrected hot water yield of the gas water heater 100 according to the present embodiment may be understood as that, a standard gas is introduced into each gas water heater 100 to operate the gas water heater 100, a plurality of data sets detected by the gas water heater 100 are recorded, the data sets include an inlet water temperature, an outlet water temperature, and a water flow rate of the gas water heater 100, and the control unit 10 obtains the corrected hot water yield of the gas water heater 100 according to a data model formed by the plurality of data sets.
Referring to fig. 5, a straight line L1(Po) represents the standard hot water yield of the gas water heater obtained by all water heaters of the same type under different opening degrees of the gas proportional valve in the prior art, for example, the standard hot water yield of the gas water heater corresponding to the predetermined opening degree value Po of the gas proportional valve is Co. The straight line L3(Po1) represents the corrected hot water yield of the gas water heater 100 obtained by each gas water heater 100 in the embodiment of the present invention at different opening degrees of the gas proportional valve, for example, the corrected hot water yield of the gas water heater 100 corresponding to the predetermined opening value Po1 of the gas proportional valve is Co _ n.
It should be noted that the straight line L3(Po1) may be understood that when the automatic sampling program of the gas water heater 100 is started, the obtained data are analyzed to find that the hot water yield of the gas water heater 100 is lower than the value of the standard hot water yield preset and specified by the model of the gas water heater 100, and therefore, in the present embodiment, the reference value of the hot water yield of the gas water heater 100 needs to be adjusted, for example, in one embodiment, the corrected hot water yield of the gas water heater 100 corresponding to the opening value Po1 of the predetermined gas proportional valve of the present embodiment is set as Co _ n, and the Co _ n is used as the hot water yield of the reference to perform data calculation.
Referring to fig. 6, a straight line L1(Po) represents the standard hot water yield of the gas water heater obtained by all water heaters of the same type under different opening degrees of the gas proportional valve in the prior art, for example, the standard hot water yield of the gas water heater corresponding to the predetermined opening degree Po of the gas proportional valve is Co. The straight line L5(Po2) represents the corrected hot water yield of the gas water heater 100 obtained by each gas water heater 100 in the embodiment of the present invention at different opening degrees of the gas proportional valve, for example, the corrected hot water yield of the gas water heater 100 corresponding to the predetermined opening degree Po1 of the gas proportional valve is Co _ n.
It should be noted that the straight line L5(Po2) may be understood that when the automatic sampling program of the gas water heater 100 is started, the obtained multiple sets of data are analyzed to obtain that the hot water yield of the gas water heater 100 is higher than the value of the standard hot water yield preset and specified by the model of the gas water heater 100, and therefore, in the present embodiment, the reference value of the hot water yield of the gas water heater 100 needs to be adjusted, for example, in one embodiment, the corrected hot water yield of the gas water heater 100 corresponding to the predetermined opening Po2 of the gas proportional valve of the present embodiment is set to be Co _ n, and the Co _ n is used as the hot water yield of the reference to perform data calculation.
Referring to fig. 7, in some embodiments, step S30 includes:
step S32, calculating the temperature difference between the current inlet water temperature of the gas water heater 100 and the current outlet water temperature of the gas water heater 100;
step S34, calculating the product of the temperature difference and the current water flow rate of the gas water heater 100 to obtain the current hot water production rate of the gas water heater 100.
The control method described above can be implemented by the gas water heater 100 of the present embodiment. The steps S32 and S34 can be implemented by the control unit 10. The control unit 10 is configured to calculate a temperature difference between a current inlet water temperature of the gas water heater 100 and a current outlet water temperature of the gas water heater 100, and calculate a product of the temperature difference and a current water flow rate of the gas water heater 100 to obtain a current hot water yield of the gas water heater 100.
In this way, the current hot water production rate of the gas water heater 100 can be accurately obtained.
Specifically, in one embodiment, the current inlet water temperature of the gas water heater 100 is T1, the current outlet water temperature of the gas water heater 100 is T2, and the current water flow rate of the gas water heater 100 is Qw, then the temperature difference between the current inlet water temperature T1 of the gas water heater 100 and the current outlet water temperature T2 of the gas water heater 100 is: and delta T is T2-T1. The current hot water yield of the gas water heater 100 is: c1 ═ (T2-T1) × Qw.
It should be noted that the hot water yield of the gas water heater 100 is a parameter reflecting the efficiency of converting the heat of gas combustion into hot water, and can be used to characterize the combustion sufficiency of the gas. Specifically, the more complete the gas combustion, the higher the conversion rate of hot water; conversely, the lower the conversion of hot water. The calculation of the current hot water production rate of the gas water heater 100 is only one example, and is not particularly limited as long as the calculation method of the efficiency of converting the heat quantity used for characterizing the gas combustion into the hot water can be used.
Referring to fig. 8, in some embodiments, step S40 includes:
step S42, judging whether the absolute value of the difference is larger than a first preset value;
when the absolute value of the difference is greater than the first preset value, step S44, controlling the gas water heater 100 to stop operating and/or sending a first alarm message that the gas water heater 100 stops operating;
when the absolute value of the difference is less than or equal to the first preset value, step S46, the gas water heater 100 is controlled to operate.
The control method described above can be implemented by the gas water heater 100 of the present embodiment. The gas water heater 100 further comprises an alarm unit 70, and the alarm unit 70 is used for sending alarm information. The steps S42, S44 and S46 may be implemented by the control unit 10. The control unit 10 is configured to determine whether an absolute value of the difference is greater than a first preset value; when the absolute value of the difference is larger than a first preset value, controlling the gas water heater 100 to stop running and/or sending first alarm information of stopping running of the gas water heater 100; and when the absolute value of the difference is less than or equal to the first preset value, controlling the gas water heater 100 to operate.
Therefore, when the absolute value of the difference is greater than the first preset value, the gas water heater 100 stops running and/or first alarm information of the gas water heater 100 stopping running is sent out, so that a user can timely acquire the abnormal condition of the gas water heater 100, and the gas water heater 100 can automatically stop running when the abnormal condition occurs, so that the safety of the gas water heater 100 can be improved.
Specifically, in one embodiment, when the absolute value of the difference is greater than the first preset value, the gas water heater 100 is controlled to stop operating and a first alarm message for stopping the gas water heater 100 is sent out. In another embodiment, when the absolute value of the difference is greater than the first preset value, the gas water heater 100 is controlled to stop operating. In yet another embodiment, when the absolute value of the difference is greater than the first preset value, the gas water heater 100 is controlled to send out a first alarm message that the gas water heater 100 stops operating.
Specifically, when the absolute value of the difference is greater than the first preset value, it indicates that the gas water heater 100 has an abnormal condition, that is, abnormal combustion data occurs, and at this time, the power supply of the gas water heater 100 may be cut off to stop the gas water heater 100. Or the control unit 10 controls the gas unit 60 to cut off the input of gas to the gas water heater 100 to stop the gas water heater 100. It should be noted that, when the absolute value of the difference is greater than the first preset value, the gas water heater 100 is controlled to send out the first alarm message, which may be understood as controlling the alarm unit 70 of the gas water heater 100 to send out a message that the gas water heater 100 has stopped operating, for example, a voice prompt that the gas water heater 100 has stopped operating. The alarm mode of the first alarm information is not limited, and can be adjusted according to the actual situation.
Referring to fig. 9, in some embodiments, step S46 includes:
step S462, determining whether the absolute value of the difference is greater than or equal to a second preset value;
when the absolute value of the difference is greater than or equal to a second preset value, step S464, controlling the gas water heater 100 to send out second alarm information that the gas water heater is abnormal in operation;
and when the absolute value of the difference value is smaller than the second preset value, the gas water heater 100 is continuously controlled to operate.
The control method described above can be implemented by the gas water heater 100 of the present embodiment. The steps S462 and S464 can be implemented by the control unit 10. The control unit 10 is configured to determine whether an absolute value of the difference is greater than or equal to a second preset value; when the absolute value of the difference is greater than or equal to a second preset value, controlling the gas water heater 100 to send out second alarm information; and when the absolute value of the difference value is smaller than the second preset value, the gas water heater 100 is continuously controlled to operate.
Therefore, the alarm state of the gas water heater 100 is controlled by comparing the absolute value of the difference between the current hot water yield of the gas water heater 100 and the corrected hot water yield of the gas water heater 100, so that a user can timely pay attention to the working condition of the gas water heater 100 to ensure the safe use of the gas water heater 100 and good user experience.
Specifically, when the difference between the current hot water yield of the gas water heater 100 and the corrected hot water yield of the gas water heater 100 is smaller than the second preset value, it indicates that the gas water heater 100 is working normally, burning is sufficient, and there is no danger at this time, and the control unit 10 continues to control the gas water heater 100 to operate. When the absolute value of the difference between the current hot water yield of the gas water heater 100 and the corrected hot water yield of the gas water heater 100 is greater than or equal to the second preset value, it indicates that the combustion of the gas water heater may be abnormal, and if the absolute value of the difference is not controlled, the abnormal combustion may cause safety problems such as incomplete combustion and vibration combustion, and therefore, in the embodiment, the second alarm message of the abnormal combustion of the gas water heater is controlled to be sent out when the absolute value of the difference is greater than or equal to the second preset value, so that the user can be timely notified of the working condition of the gas water heater 100, and corresponding processing is performed.
It should be noted that the second alarm information is understood that, in one embodiment, the control alarm unit 70 sounds a siren alarm. In another embodiment, the alarm unit is controlled to emit a flashing red light. In yet another embodiment, the control alarm 70 unit sounds a siren alarm and flashes a glaring light. It should be noted that the second alarm information of the alarm unit 70 is not limited herein, and may be set according to actual requirements.
In an embodiment, referring to fig. 10, the first preset value may be set to e1, the second preset value may be set to e2, the opening of the gas proportional valve of the gas water heater 100 is P, the current inlet water temperature of the gas water heater 100 is T1, the current outlet water temperature of the gas water heater 100 is T2, the current water flow rate of the gas water heater 100 is Qw, the calculated current hot water yield of the gas water heater 100 is C1 ═ T2-T1 × Qw, the corrected hot water yield of the gas water heater 100 corresponding to the gas proportional opening of the gas water heater 100 that is obtained by starting the automatic sampling procedure of the gas water heater 100 is Po1 is Co _ n, and the absolute value of the difference between the current hot water yield of the gas water heater 100 and the corrected hot water yield of the gas water heater 100 is | dC |.
And when the | dC | is greater than e1, controlling the gas water heater 100 to stop running and/or sending a first alarm message of stopping the gas water heater 100 and controlling the gas water heater 100 to stop running.
And when the | dC | is less than e2, controlling the gas water heater 100 to continue normal operation.
And when the e2 is less than or equal to | dC | < e1, controlling the gas water heater 100 to send out second alarm information of the abnormality of the gas water heater 100.
Referring to fig. 11, a straight line L3(Po1) represents the corrected hot water yield of the gas water heater 100 obtained by each gas water heater 100 according to the embodiment of the present invention under different opening degrees of the gas proportional valve, for example, the corrected hot water yield of the gas water heater 100 corresponding to the predetermined opening degree Po1 of the gas proportional valve is Co _ n. The straight line L7(P1) represents the resulting current hot water production rate relationship for the gas water heater 100 at the opening value of the current gas proportional valve of the gas water heater 100. However, in the case where the opening degree of the gas proportional valve at the point P1 of the straight line L7(P1) is the same as the opening degree of the gas proportional valve at the point Po1 of the straight line L3(Po1), the current hot water yield of the gas water heater 100 is C1, and as shown in fig. 11, in the case where the opening degree of the gas proportional valve of the same gas water heater 100 is the same, the current hot water yield of the gas water heater 100 is C1 smaller than the corrected hot water yield of the gas water heater 100 is Co _ n, that is, the hot water yield of the gas water heater at this time does not reach the corrected hot water yield in the reference state, which may be caused by problems such as insufficient combustion, and the like, and to avoid such deterioration, in this embodiment, the gas water heater 100 is controlled to issue a second alarm message that the gas water heater 100 is abnormal at this time to notify the user of paying attention to the operating condition of.
Referring to fig. 12, a straight line L5(Po2) represents the corrected hot water yield of the gas water heater 100 obtained by each gas water heater 100 according to the embodiment of the present invention under different opening values of the gas proportional valve, for example, the corrected hot water yield of the gas water heater 100 corresponding to the opening value Po2 of the predetermined gas proportional valve is Co _ n, and a straight line L9(P2) represents the current hot water yield relationship of the gas water heater 100 obtained under the current opening value of the gas proportional valve of the gas water heater 100. In the case where the opening value of the gas proportional valve at the point P2 of the straight line L9(P2) is the same as the opening value of the gas proportional valve at the point Po2 of the straight line L5(Po2), the current hot water yield of the gas water heater 100 is C2, and as shown in fig. 12, when the opening value of the gas proportional valve of the same gas water heater 100 is greater than the corrected hot water yield of the gas water heater 100 by C2, that is, when the hot water yield of the gas water heater 100 exceeds the corrected hot water yield in the reference state, the phenomenon may cause the hot water burner to generate vibration gas, and the like, and in order to avoid such deterioration, in the present embodiment, the gas water heater 100 is controlled to send out the second alarm message to notify the user of the operation of the gas water heater 100 in time.
In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean 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, schematic representations of the above terms 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.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processing module-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection having one or more wires (control method), a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of embodiments of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A method of controlling a gas water heater, comprising:
acquiring a corrected hot water yield according to an automatic sampling instruction of the gas water heater, wherein the corrected hot water yield is determined by the water inlet temperature, the water outlet temperature and the water flow rate of the gas water heater;
determining the current hot water yield of the gas water heater according to the current water inlet temperature of the gas water heater, the current water outlet temperature of the gas water heater and the current water flow rate of the gas water heater; and
and calculating a difference value between the current hot water yield of the gas water heater and the corrected hot water yield of the gas water heater, and controlling the working state and the alarm state of the gas water heater according to the difference value.
2. The control method of claim 1, wherein calculating a difference between a current hot water production rate of the gas water heater and a corrected hot water production rate of the gas water heater, and controlling an operating state and an alarm state of the gas water heater according to the difference comprises:
judging whether the absolute value of the difference value is larger than a first preset value or not;
when the absolute value of the difference is larger than the first preset value, controlling the gas water heater to stop running and/or sending first alarm information of the gas water heater to stop running; and when the absolute value of the difference is smaller than or equal to the first preset value, controlling the gas water heater to operate.
3. The control method according to claim 2, wherein when the absolute value of the difference is less than or equal to the first preset value, controlling the gas water heater to operate comprises:
judging whether the absolute value of the difference value is greater than or equal to a second preset value or not;
and when the absolute value of the difference is greater than or equal to the second preset value, controlling the gas water heater to send out second alarm information of abnormal operation of the gas water heater.
4. The control method of claim 1, wherein determining the current hot water production rate of the gas water heater according to the current inlet water temperature of the gas water heater, the current outlet water temperature of the gas water heater, and the current water flow rate of the gas water heater comprises:
calculating the temperature difference between the current water inlet temperature of the gas water heater and the current water outlet temperature of the gas water heater;
and calculating the product of the temperature difference and the current water flow rate of the gas water heater to obtain the current hot water yield of the gas water heater.
5. A gas water heater comprising a control unit for:
acquiring a corrected hot water yield according to an automatic sampling instruction of the gas water heater, wherein the corrected hot water yield is determined by the water inlet temperature, the water outlet temperature and the water flow rate of the gas water heater;
determining the current hot water yield of the gas water heater according to the current water inlet temperature of the gas water heater, the current water outlet temperature of the gas water heater and the current water flow rate of the gas water heater; and
and calculating a difference value between the current hot water yield of the gas water heater and the corrected hot water yield of the gas water heater, and controlling the working state and the alarm state of the gas water heater according to the difference value.
6. The gas water heater of claim 5, wherein the control unit is to:
judging whether the absolute value of the difference value is larger than a first preset value or not;
when the absolute value of the difference is larger than the first preset value, controlling the gas water heater to stop running and/or sending first alarm information of the gas water heater to stop running;
and when the absolute value of the difference is smaller than or equal to the first preset value, controlling the gas water heater to operate.
7. The gas water heater of claim 6, wherein the control unit is to:
judging whether the absolute value of the difference value is greater than or equal to a second preset value or not;
and when the absolute value of the difference is greater than or equal to the second preset value, controlling the gas water heater to send out second alarm information of abnormal operation of the gas water heater.
8. The gas water heater of claim 5, wherein the control unit is to:
calculating the temperature difference between the current water inlet temperature of the gas water heater and the current water outlet temperature of the gas;
and calculating the product of the temperature difference and the current water flow rate of the gas water heater to obtain the current hot water yield of the gas water heater.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811353990.1A CN111189228A (en) | 2018-11-14 | 2018-11-14 | Control method of gas water heater and gas water heater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811353990.1A CN111189228A (en) | 2018-11-14 | 2018-11-14 | Control method of gas water heater and gas water heater |
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| CN111189228A true CN111189228A (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811353990.1A Pending CN111189228A (en) | 2018-11-14 | 2018-11-14 | Control method of gas water heater and gas water heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111783A (en) * | 2021-03-19 | 2022-09-27 | 保音股份有限公司 | Power control method of water heater |
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