Control method of gas water heater and gas water heater

Abstract

The invention relates to the technical field of hot water supply equipment, and discloses a control method of a gas water heater and the gas water heater. The control method comprises the steps that under the conditions that the gas water heater is in a stable working state and a main controller of the gas water heater adopts closed-loop control over a direct-current fan, the fluctuation condition of working parameters of the direct-current fan is judged; the working parameters comprise at least one of current or rotating speed; and if the fluctuation of the working parameters is abnormal, reducing the sensitivity of the main controller. The fluctuation condition of the working parameters of the direct-current fan is judged, if it is detected that the fluctuation of the working parameters of the direct-current fan is abnormal, the sensitivity of the main controller is reduced, and the situation that the rotating speed of the fan is further fluctuated due to the fact that the parameters output to the direct-current fan are frequently adjusted due to too fast response is avoided; therefore, the fluctuation abnormity of the working parameters of the direct-current fan in the operation process of the gas water heater is effectively controlled, the working stability of the gas water heater is improved, and the use requirements of users are met.

Description

Technical Field

[0001] The present invention relates to the technical field of hot water supply equipment, and in particular to a control method for a gas water heater and a gas water heater. Background Art

[0002] At present, there are two main control methods for DC fans of gas water heaters: open-loop control and closed-loop control. When the DC fan uses the closed-loop control method, although it can automatically adjust the speed to deal with air duct blockage, it will experience abnormal speed fluctuations during normal operation, thus affecting the stable operation of the gas water heater. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a control method for a gas water heater, which effectively solves the problem that when a DC fan uses a closed-loop control method, the stable operation of the gas water heater is affected by abnormal speed fluctuations.

[0004] The above technical problems are solved by the following technical solutions:

[0005] A control method for a gas water heater, comprising:

[0006] When the gas water heater is in a stable working state and the main controller of the gas water heater adopts a closed-loop control of the DC fan, determining the fluctuation of the working parameters of the DC fan, wherein the working parameters include at least one of current or rotation speed;

[0007] If the operating parameter fluctuates abnormally, the sensitivity of the main controller is reduced.

[0008] Compared with the background technology, the control method of the gas water heater described in the present invention has the following beneficial effects: when the gas water heater is in a stable working state and the main controller of the gas water heater adopts closed-loop control of the DC fan, since the working parameters of the DC fan will fluctuate when the closed-loop control is used, if it is determined that the working parameter fluctuation of the DC fan is abnormal, the sensitivity of the main controller is reduced to avoid further fluctuations in the fan speed due to frequent adjustment of the parameters output to the DC fan due to excessive reaction, thereby effectively controlling the abnormal fluctuations in the DC fan speed during the operation of the gas water heater to solve the problem of abnormal fluctuations in the working parameters caused by the closed-loop control of the DC fan by the main controller. At the same time, the characteristic of fast air addition after the air duct is blocked in the closed-loop control mode can be maintained, thereby improving the working stability of the gas water heater and meeting the user's usage needs.

[0009] In one embodiment, reducing the sensitivity of the main controller includes:

[0010] Increase the duty cycle refresh period of the pulse width modulation signal sent by the main controller based on the speed signal.

[0011] Beneficial effect: By increasing the duty cycle refresh period of the pulse width modulation signal sent by the main controller based on the speed signal, the time interval between two updates of the duty cycle of the pulse width modulation signal by the main controller is increased, thereby reducing the refresh frequency of the main controller, reducing the response speed of the main controller, and improving the anti-interference ability of the main controller. The working parameters of the DC fan are made to conform to the fluctuation range, thereby improving the working stability of the gas water heater.

[0012] In one embodiment, the step of increasing the duty cycle refresh period of the pulse width modulation signal sent by the main controller includes:

[0013] Determining a current sensitivity adjustment gear of the main controller, the sensitivity adjustment gear of the main controller corresponding to the duty cycle refresh period one by one;

[0014] The current sensitivity adjustment gear is adjusted to increase the duty cycle refresh period.

[0015] Beneficial effect: When the main controller performs sensitivity adjustment, the current sensitivity adjustment gear of the main controller is determined. Since the sensitivity adjustment gear of the main controller corresponds to the duty cycle refresh period one by one, different sensitivity adjustment gears represent different sensitivity levels. Each sensitivity adjustment gear matches a specific duty cycle refresh period. After adjusting the current sensitivity adjustment gear, the main controller will operate according to the duty cycle refresh period corresponding to the adjusted sensitivity adjustment gear to increase the duty cycle refresh period; by adjusting different sensitivity adjustment gears to change the duty cycle refresh period of the main controller, the sensitivity adjustment can be made more convenient.

[0016] In one embodiment, adjusting the current sensitivity adjustment gear to increase the duty cycle refresh period includes:

[0017] Adjusting the current sensitivity adjustment gear step by step, and detecting the fluctuation of the working parameters of the DC fan;

[0018] If the operating parameter still fluctuates abnormally, continue to adjust the current sensitivity adjustment gear step by step.

[0019] Beneficial effect: By adjusting the current sensitivity adjustment gear step by step, the sensitivity of the main controller can be gradually reduced, so as to better determine the appropriate sensitivity adjustment gear, and effectively control the working parameters of the DC fan to avoid abnormal fluctuations. After adjusting the sensitivity adjustment gear, further detect the fluctuation of the working parameters of the DC fan to determine whether the DC fan works stably after adjusting the sensitivity of the main controller; if the working parameters still fluctuate abnormally, continue to adjust the current sensitivity adjustment gear of the main controller step by step until the fluctuation range of the working parameters is within the normal range. This method can gradually optimize the working performance of the DC fan and ensure the reliability of the DC fan and the gas water heater.

[0020] In one embodiment, the method further comprises:

[0021] If the working parameter fluctuates abnormally, a first prompt message is displayed on the display interface of the gas water heater;

[0022] Obtaining a response instruction for the first prompt information;

[0023] If the response instruction indicates entering the automatic debugging mode, the step of adjusting the current sensitivity adjustment gear to increase the duty cycle refresh period is performed.

[0024] Beneficial effects: If the working parameter fluctuation of the DC fan is detected to be abnormal, the first prompt information is displayed on the display interface of the gas water heater to remind the user that the working state of the gas water heater is abnormal; the user can give a response instruction to the first prompt information on the display interface of the gas water heater; if the response instruction indicates entering the automatic debugging mode, the gas water heater executes the step of adjusting the current sensitivity adjustment gear to increase the duty cycle refresh cycle; thereby increasing the duty cycle refresh cycle to reduce the sensitivity of the main controller, making the operation of the DC fan more stable, and solving the problem of abnormal working parameter fluctuations. Through the automatic debugging of the gas water heater, the user's operating difficulty and the requirements for professional knowledge can be reduced, and the reliability and ease of use of the gas water heater can be improved.

[0025] In one embodiment, the method further comprises:

[0026] If the fluctuation of the working parameter is normal, a second prompt message is displayed on the display interface of the gas water heater, and the second prompt message is used to indicate that the adjustment is completed.

[0027] Beneficial effect: When the working parameters of the DC fan are tested, if it is found that its fluctuation is within the normal range, it means that the gas water heater is currently in a stable operating state. At the same time, a second prompt message is displayed on the display interface of the gas water heater to convey the current state of the gas water heater to the user, indicating that the gas water heater has been adjusted and is in normal operating state.

[0028] In one of the embodiments, the sensitivity adjustment gear of the main controller is positively correlated with the duty cycle refresh period.

[0029] Beneficial effect: When the sensitivity adjustment gear of the main controller increases, the main controller's sensitivity to changes in the gas water heater decreases, and the duty cycle refresh cycle is correspondingly extended. The main controller can refresh the duty cycle at a lower frequency to reduce the fluctuation of the DC fan operating parameters and make the gas water heater run more stably.

[0030] In one of the embodiments, the maximum duty cycle refresh period of the pulse width modulation signal sent by the main controller is no more than 300ms.

[0031] Beneficial effect: By setting a reasonable pulse width modulation signal duty cycle refresh cycle, the time interval between two updates of the pulse width modulation signal duty cycle by the main controller is avoided to be too long, so that the gas water heater has a faster response speed and can adjust the output in time to maintain a stable operating state.

[0032] In one embodiment, the determining of fluctuations in operating parameters of the DC fan of the gas water heater includes:

[0033] Obtaining a fluctuation value of the working parameter;

[0034] If the fluctuation value of the working parameter is not less than the preset fluctuation value, it is determined that the fluctuation condition is abnormal fluctuation.

[0035] Beneficial effects: First, the fluctuation value of the working parameter can be obtained by measurement. After the fluctuation value of the working parameter is determined, the obtained fluctuation value is compared with the preset fluctuation value. If the fluctuation value of the working parameter is not less than the preset fluctuation value, the fluctuation is judged to be abnormal. By obtaining the fluctuation value of the working parameter and comparing it with the preset fluctuation value, the operating state of the gas water heater can be effectively monitored, and the working state of the DC fan can be determined in time, so that the gas water heater can respond quickly, further ensuring the stable operation of the gas water heater.

[0036] The present invention also provides a gas water heater, comprising: a memory, a processor, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus;

[0037] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the operation of the control method of the gas water heater as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A flow chart of a method for controlling a gas water heater according to an embodiment of the present invention;

[0040] Figure 2 A schematic flow chart of a control method for a gas water heater according to another embodiment of the present invention;

[0041] Figure 3 A schematic flow chart of a control method for a gas water heater according to another embodiment of the present invention;

[0042] Figure 4 A schematic flow chart of a control method for a gas water heater according to another embodiment of the present invention;

[0043] Figure 5 A schematic flow chart of a control method for a gas water heater according to another embodiment of the present invention;

[0044] Figure 6 The figure is a schematic structural diagram of a gas water heater according to an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Combine the following Figures 1 to 5 , describing an embodiment of the present invention.

[0048] According to an embodiment of the present invention, on the one hand, Figure 1 As shown, a control method for a gas water heater is provided, comprising the following steps:

[0049] Step S100: when the gas water heater is in a stable working state and the main controller of the gas water heater adopts closed-loop control of the DC fan, determine the fluctuation of the working parameters of the DC fan, where the working parameters include at least one of current or rotation speed.

[0050] In step S100, firstly, it is ensured that the gas water heater is in a stable working state, that is, the combustion load of the gas water heater is stable. For example, when the gas water heater is in a stable working state at a certain gear, it indicates that the gas water heater can burn with a stable gas flow rate and a stable combustion flame, and the water temperature fluctuates less within the set temperature range.

[0051] The main controller of the gas water heater adopts closed-loop control of the DC fan. The closed-loop control can keep the DC fan in a relatively stable operating state under different working conditions. The fluctuation of the working parameters of the DC fan can be detected by the main controller. Specifically, the fluctuation of various working parameters of the DC fan can be detected by sensors, and the fluctuation of various working parameters detected can be fed back to the main controller.

[0052] The working parameters of the DC fan include but are not limited to one or more of current, voltage, temperature and speed. When performing fluctuation detection, the value of the corresponding working parameter can be collected at preset time intervals, and the fluctuation rate of the working parameter can be obtained by using the ratio of the collected working parameter value to the preset time, so as to characterize the fluctuation of the working parameter.

[0053] Of course, other methods may also be used to determine the fluctuation of the working parameters of the DC fan, which are not limited here.

[0054] Step S200: If the working parameter fluctuates abnormally, the sensitivity of the main controller is reduced.

[0055] In step S200, the fluctuation of the working parameters is judged to determine whether there is abnormal fluctuation. If the change of the working parameters within a period of time exceeds the normal range, it is considered that the working parameter fluctuation is abnormal; when the working parameter fluctuation is abnormal, the sensitivity of the main controller is reduced, so that the main controller reacts relatively slowly to the change of the working parameters, avoiding the frequent adjustment of the parameters output to the DC fan due to excessive reaction, which further causes the fluctuation of the fan speed, thereby effectively controlling the abnormal fluctuation of the DC fan speed during the operation of the gas water heater, so as to solve the problem of abnormal fluctuation of the working parameters caused by the closed-loop control of the DC fan by the main controller, and at the same time, it can also maintain the characteristic of fast air addition after the air duct is blocked in the closed-loop control mode, thereby improving the working stability of the gas water heater and meeting the user's use needs.

[0056] In other embodiments, the main controller can detect the fluctuation of the working parameters of the DC fan in real time or periodically. By detecting the fluctuation of the working parameters of the DC fan in real time, it is possible to detect and respond to abnormal fluctuations in the working parameters as soon as possible, so that the main controller can quickly adjust the control parameters of the DC fan to restore the normal operation of the DC fan as soon as possible. By periodically detecting the fluctuation of the working parameters of the DC fan, it is possible to reduce the occupation of the resources of the gas water heater while ensuring the detection effect; when the processing capacity of the main controller is limited, the overall performance and working stability of the gas water heater can be further improved. How to choose the detection time of the main controller can be selected according to actual usage needs, and there is no specific limitation.

[0057] In one embodiment, if Figure 2 As shown, step S100 includes the following steps:

[0058] Step S110: Obtain the fluctuation value of the working parameter.

[0059] In step S110, taking the fluctuation value of the speed in the working parameters of the DC fan as an example, the change of the speed of the DC fan within a period of time is detected by a sensor, and the detected change of the speed within a period of time is transmitted to the main controller of the gas water heater, and the change of the speed within a period of time is analyzed by the main controller to obtain the fluctuation value of the speed of the DC fan. Similarly, the method for obtaining the fluctuation values ​​of the current, voltage, etc. in the working parameters of the DC fan is consistent with the method for obtaining the fluctuation value of the speed, which will not be repeated here.

[0060] Step S120: If the fluctuation value of the working parameter is not less than the preset fluctuation value, the fluctuation condition is determined to be abnormal.

[0061] In step S120, for working parameters such as current and speed, a normal fluctuation value can be set according to factors such as the design specifications, working environment and performance requirements of the DC fan. For example, the fluctuation value of the current is set to ±10mA, and the fluctuation value of the speed is set to ±50 rpm. If the fluctuation value existing in the working parameter is not less than the preset fluctuation value, it is considered to be an abnormal working parameter. For example, if the actual measured current fluctuation value is ±10mA, or the speed fluctuation value is ±50 rpm, it can be determined that the working parameter of the DC fan is an abnormal working parameter. It can be further determined that the fluctuation of the DC fan is abnormal. By obtaining the fluctuation value of the working parameter and comparing it with the preset fluctuation value, the operating state of the gas water heater can be effectively monitored, and the working state of the DC fan can be determined in time, so that the gas water heater can respond quickly, and further ensure the stable operation of the gas water heater.

[0062] It should be noted that the above current fluctuation range is exemplary and is not limited to ±10mA, but can also be ±8mA, ±12mA, etc., and is not specifically limited. Similarly, the speed fluctuation range is not limited to ±50 rpm, but can also be ±40 rpm, ±60 rpm, etc., and can be set according to actual needs.

[0063] In one embodiment, obtaining the fluctuation value of the working parameter includes: obtaining the current or speed of the DC fan twice adjacently; and calculating the difference between the two adjacent currents or speeds, where the difference is the fluctuation value.

[0064] In this embodiment, the current or speed data of the DC fan can be obtained by the sensor, and then the current or speed data can be converted into an electrical signal and transmitted to the main controller for processing and analysis. The main controller calculates the difference between the two adjacent currents or speeds, and uses the difference as the fluctuation value; the fluctuation value can reflect the change of the working parameters of the DC fan between two time points, and the working state of the DC fan can be further judged according to the size of the fluctuation value.

[0065] In one embodiment, step S200 further includes: increasing a duty cycle refresh period of a pulse width modulation signal sent by the main controller based on the rotation speed signal.

[0066] In this embodiment, the duty cycle refresh period refers to the time interval between two updates of the duty cycle of the pulse width modulation signal by the main controller. For example, if the duty cycle refresh period is 1 second, the main controller will recalculate and send a new duty cycle value every 1 second. The speed data of the DC fan is measured by the sensor, and the speed data is converted into a speed signal; then the speed signal is transmitted to the main controller, and the main controller can send the duty cycle refresh period of the pulse width modulation signal based on the speed signal. If the duty cycle refresh period of the pulse width modulation signal sent by the main controller based on the speed signal is short, the main controller frequently adjusts the duty cycle, which may cause abnormal current and speed of the DC fan, causing the gas water heater to operate abnormally. At this time, it is necessary to increase the duty cycle refresh period of the pulse width modulation signal sent by the main controller, thereby reducing the refresh frequency of the main controller, reducing the response speed of the main controller, and improving the anti-interference ability of the main controller, so that the working parameters of the DC fan meet the fluctuation range, thereby improving the working stability of the gas water heater.

[0067] In one of the embodiments, the maximum duty cycle refresh period of the pulse width modulation signal sent by the main controller is no greater than 300 ms.

[0068] In this embodiment, the maximum duty cycle refresh period of the pulse width modulation signal sent by the main controller can be 10ms, 20ms, 50ms, 100ms, 150ms, 200ms, 250ms, 300ms, etc.; how to set the duty cycle refresh period can be selected according to actual usage requirements, and there is no specific limitation. By setting a reasonable pulse width modulation signal duty cycle refresh period, it is avoided that the time interval between the main controller updating the pulse width modulation signal duty cycle is too long, so that the gas water heater has a faster response speed, and can adjust the output in time to maintain a stable operating state.

[0069] In one embodiment, if Figure 3 As shown, step S200 includes the following steps:

[0070] Step S210: determine the current sensitivity adjustment gear of the main controller, and the sensitivity adjustment gear of the main controller corresponds to the duty cycle refresh period one by one.

[0071] In step S210, first, multiple sensitivity adjustment gears are preset in each gear of the gas water heater, and the sensitivity adjustment gear of the main controller corresponds to the duty cycle refresh period one by one; for example, 5 sensitivity adjustment gears 1-5 are preset, and the duty cycle refresh periods corresponding to the 5 sensitivity adjustment gears are 10ms, 20ms, 50ms, 100ms, and 200ms respectively. For example, when the sensitivity adjustment gear of the main controller is 1, its duty cycle refresh period is 10ms, and the main controller can frequently adjust the duty cycle and quickly respond to changes in the gas water heater; when the sensitivity adjustment gear is 5, its duty cycle refresh period is 200ms, and the adjustment frequency of the main controller is relatively reduced. The current sensitivity gear of the main controller can be determined by the duty cycle refresh period.

[0072] Step S220: adjust the current sensitivity adjustment gear to increase the duty cycle refresh period.

[0073] In step S220, after determining the current sensitivity adjustment gear of the main controller, the gas water heater can automatically increase the current sensitivity adjustment gear to increase the duty cycle refresh period of the main controller, thereby reducing the sensitivity of the main controller, improving the stability and reliability of the gas water heater, and reducing unnecessary fluctuations and interference. By adjusting different sensitivity adjustment gears to change the duty cycle refresh period of the main controller, the sensitivity adjustment of the main controller can be made more convenient.

[0074] In one embodiment, if Figure 4 As shown, step S220 includes the following steps:

[0075] Step S221, gradually adjusting the current sensitivity adjustment gear, and detecting the fluctuation of the working parameters of the DC fan.

[0076] In step S221, when adjusting the current sensitivity adjustment gear of the main controller, the sensitivity of the main controller is gradually reduced by adjusting step by step, so as to better determine the appropriate sensitivity adjustment gear, and the working parameters of the DC fan can be effectively controlled to avoid abnormal fluctuations. For example, when the current sensitivity adjustment gear of the main controller is 1, if the fluctuation of the working parameters of the DC fan is detected to be abnormal, the current sensitivity adjustment gear of the controller is increased to 2. When the current sensitivity adjustment gear of the main controller is 3, if the fluctuation of the working parameters of the DC fan is detected to be abnormal, the current sensitivity adjustment gear of the controller is increased to 4. After adjusting the current sensitivity adjustment gear, it is necessary to further detect the fluctuation of the working parameters of the DC fan.

[0077] Step S222: If the working parameter still fluctuates abnormally, continue to adjust the current sensitivity adjustment gear step by step.

[0078] In step S222, if the working parameters of the DC fan still fluctuate abnormally after adjusting the sensitivity adjustment gear once, the current sensitivity adjustment gear is not the best choice. It is necessary to continue to adjust the current sensitivity adjustment gear step by step to further find a sensitivity adjustment gear that can make the gas water heater run stably. This method can gradually optimize the working performance of the DC fan and ensure the reliability of the DC fan and the gas water heater.

[0079] In one of the embodiments, the sensitivity adjustment level of the main controller is positively correlated with the duty cycle refresh period.

[0080] In this embodiment, if the current sensitivity adjustment gear of the main controller is 1, the sensitivity of the main controller is relatively high. By increasing the current sensitivity adjustment gear, the sensitivity of the main controller to the change of the gas water heater is reduced, and the duty cycle refresh period is correspondingly extended. The main controller can refresh the duty cycle at a lower frequency to reduce the fluctuation of the DC fan working parameters and make the gas water heater run more stably.

[0081] In one embodiment, if Figure 5 As shown, the method further comprises the following steps:

[0082] Step S223: If the operating parameter fluctuation is abnormal, a first prompt message is displayed on the display interface of the gas water heater.

[0083] In step S223, when it is detected that the fluctuation of the working parameters of the DC fan exceeds the normal range, it is determined that the fluctuation of the working parameters of the DC fan is abnormal. At the same time, a first prompt message is displayed on the display interface of the gas water heater to remind the user that the working state of the gas water heater is abnormal. Specifically, it can be displayed in the display on the gas water heater; the first prompt message can be text, an icon or a specific warning signal so that the user can understand the status of the gas water heater in time. For example, a prompt such as "The gas water heater is abnormal, do you want to switch to automatic debugging mode" is displayed.

[0084] Step S224: Obtain a response instruction for the first prompt information.

[0085] In step S224, the gas water heater waits for the user to respond to the first prompt information; the user can give a response instruction on the display of the gas water heater or through an interactive method such as a remote controller. The response instruction may include multiple options; for example, entering the automatic debugging mode, the manual adjustment mode, or seeking professional maintenance, etc.; the gas water heater will take corresponding actions according to different instructions.

[0086] Step S225: If the response instruction indicates entering the automatic debugging mode, the step of adjusting the current sensitivity adjustment gear to increase the duty cycle refresh period is executed.

[0087] In step S225, when the user chooses to enter the automatic debugging mode, the system executes the step of adjusting the current sensitivity adjustment gear to increase the duty cycle refresh cycle; thereby increasing the duty cycle refresh cycle to reduce the sensitivity of the main controller, making the operation of the DC fan more stable, and solving the problem of abnormal fluctuations in working parameters. Through the automatic debugging of the gas water heater, the user's operating difficulty and the requirements for professional knowledge can be reduced, and the reliability and usability of the gas water heater can be improved.

[0088] In one of the embodiments, the method further includes: if the fluctuation of the operating parameter is normal, displaying a second prompt message on the display interface of the gas water heater, the second prompt message being used to indicate that the adjustment is completed.

[0089] In this embodiment, when the working parameters of the DC fan are detected, if it is found that its fluctuation is within the normal range, it means that the gas water heater is currently in a stable operating state. The second prompt message is displayed on the display interface of the gas water heater to convey the current state of the gas water heater to the user, informing the user that the adjustment process has been completed and the gas water heater is operating normally. The second prompt message is used to indicate that the adjustment is complete, and can be expressed in concise and clear text, such as "Adjustment completed, gas water heater operating normally" or a specific icon to indicate the successful adjustment state. In order to facilitate user understanding, users do not need to have professional technical knowledge to understand the current situation of the gas water heater. By displaying the second prompt message on the display interface of the gas water heater, the operating status of the gas water heater can be effectively fed back to the user.

[0090] In other embodiments, when the gas water heater is in a preset gear and operates stably, the main controller operates at the adjusted sensitivity gear.

[0091] In this embodiment, the preset gear is the current working gear of the gas water heater; the gas water heater includes multiple gears, for example, high fire, medium fire and low fire correspond to three gears respectively, and each gear corresponds to multiple sensitivity adjustment gears. When the gas water heater is running at the gear corresponding to low fire, the current sensitivity gear of the gas water heater is 1, and the DC fan has abnormal current or speed fluctuations at this time; by adjusting the current sensitivity adjustment gear to 4, the working parameters of the DC fan are within the normal fluctuation range, then when the gas water heater works at low fire each time, the sensitivity adjustment gear of its main controller is operated at 4 gears to ensure that the gas water heater is always in a stable working state and improve the user experience of the gas water heater.

[0092] Figure 6 The schematic diagram of the structure of the embodiment of the gas water heater provided by the embodiment of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the gas water heater.

[0093] like Figure 6 As shown, the gas water heater may include: a processor (processor) 502 , a communications interface (Communications Interface) 504 , a memory (memory) 506 , and a communication bus 508 .

[0094] The processor 502, the communication interface 504, and the memory 506 communicate with each other via a communication bus 508. The communication interface 504 is used to communicate with other devices such as a client or other server network elements. The processor 502 is used to execute a program 510, which can specifically execute the relevant steps in the above-mentioned control method embodiment for a gas water heater.

[0095] Specifically, the program 510 may include program code including computer-executable instructions.

[0096] The processor 502 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiment of the present invention. The one or more processors included in the gas water heater may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0097] The memory 506 is used to store the program 510. The memory 506 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0098] The program 510 can be specifically called by the processor 502 to enable the gas water heater to execute the relevant steps in the above-mentioned control method embodiment for the gas water heater.

[0099] It can be understood by those skilled in the art that Figure 6 The structure shown is for illustration only and does not limit the structure of the above-mentioned device. Figure 6 More or fewer components as shown, or with Figure 6 Different configurations shown.

[0100] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0101] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The specific contents of the above specific embodiments only express several embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A control method for a gas water heater, characterized in that: include: When the gas water heater is in a stable working state and the main controller of the gas water heater adopts a closed-loop control of the DC fan, determining the fluctuation of the working parameters of the DC fan, wherein the working parameters include at least one of current or rotation speed; If the operating parameter fluctuates abnormally, the sensitivity of the main controller is reduced.

2. The control method of the gas water heater according to claim 1, characterized in that: The step of reducing the sensitivity of the main controller comprises: Increase the duty cycle refresh period of the pulse width modulation signal sent by the main controller based on the speed signal.

3. The control method of the gas water heater according to claim 2, characterized in that: The step of increasing the duty cycle refresh period of the pulse width modulation signal sent by the main controller comprises: Determining a current sensitivity adjustment gear of the main controller, the sensitivity adjustment gear of the main controller corresponding to the duty cycle refresh period one by one; The current sensitivity adjustment gear is adjusted to increase the duty cycle refresh period.

4. The control method of the gas water heater according to claim 3, characterized in that: The adjusting the current sensitivity adjustment gear to increase the duty cycle refresh period includes: Adjusting the current sensitivity adjustment gear step by step, and detecting the fluctuation of the working parameters of the DC fan; If the operating parameter still fluctuates abnormally, continue to adjust the current sensitivity adjustment gear step by step.

5. The control method of the gas water heater according to claim 3, characterized in that: The method further comprises: If the working parameter fluctuates abnormally, a first prompt message is displayed on the display interface of the gas water heater; Obtaining a response instruction for the first prompt information; If the response instruction indicates entering the automatic debugging mode, the step of adjusting the current sensitivity adjustment gear to increase the duty cycle refresh period is performed.

6. The control method of the gas water heater according to claim 5, characterized in that: The method further comprises: If the fluctuation of the working parameter is normal, a second prompt message is displayed on the display interface of the gas water heater, and the second prompt message is used to indicate that the adjustment is completed.

7. The control method of the gas water heater according to claim 3, characterized in that: The sensitivity adjustment gear of the main controller is positively correlated with the duty cycle refresh period.

8. The control method of the gas water heater according to claim 2, characterized in that: The maximum duty cycle refresh period of the pulse width modulation signal sent by the main controller is no more than 300ms.

9. The control method of a gas water heater according to any one of claims 1 to 8, characterized in that: The determining of fluctuations in the operating parameters of the DC fan includes: Obtaining a fluctuation value of the working parameter; If the fluctuation value of the working parameter is not less than the preset fluctuation value, it is determined that the fluctuation condition is abnormal fluctuation.

10. A gas water heater, characterized in that: include: A memory, a processor, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the control method of the gas water heater according to any one of claims 1 to 9.

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