Gas water heater control method, gas water heater and readable storage medium

Abstract

The application discloses a gas water heater control method, a gas water heater and a readable storage medium, and relates to the technical field of gas water heaters. The gas water heater control method comprises the following steps: when the gas water heater fails to ignite or goes out, determining whether the out-of-fire cause of the gas water heater belongs to a preset out-of-fire cause according to water flow information, fan resistance information, running time or water temperature information of the gas water heater; and in the case that the out-of-fire cause of the gas water heater does not belong to the preset out-of-fire cause, adjusting the operation parameter of the gas water heater based on a preset adjustment range. The application solves the technical problem that the gas water heater is prone to ignition failure and accidental out-of-fire under complex actual working conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas water heaters, and particularly relates to a gas water heater control method, a gas water heater and a computer readable storage medium. BACKGROUND

[0002] Continuous and reliable combustion of a gas water heater in a working process is a key to providing stable heat energy and output hot water, which depends on a proper air-fuel ratio between an air amount and a gas supply amount in gas combustion. In an actual local working environment, although the gas water heater determines relevant operation parameters in advance to ensure the proper air-fuel ratio, actual operation conditions are affected by gas pipe network fluctuations, gas calorific value, and gas flue length and direction, etc., resulting in unstable combustion process. In addition, deviations of the gas water heater from production to assembly environment, debugging, etc., also cause the pre-determined operation parameters to mismatch with actual conditions. In summary, due to the influence of the above external environment and internal factors, the gas water heater is prone to ignition failure and accidental flameout under complex actual conditions, affecting the user's water experience.

[0003] The above information disclosed in this BACKGROUND section is only for the purpose of understanding the background of the present application, and therefore, it can contain information that does not constitute prior art. SUMMARY

[0004] The main purpose of the present application is to provide a gas water heater control method, a gas water heater and a computer readable storage medium, aiming to solve the technical problem that the gas water heater is prone to ignition failure and accidental flameout under complex actual conditions.

[0005] To achieve the above-mentioned purpose, the present application provides a gas water heater control method, which comprises:

[0006] When the gas water heater appears ignition failure or flameout, it is judged whether the flameout cause of the gas water heater belongs to a preset flameout cause according to water flow information, fan resistance information, running time or water temperature information of the gas water heater.

[0007] In the case that the flameout cause of the gas water heater does not belong to the preset flameout cause, the operation parameters of the gas water heater are adjusted based on a preset adjustment range, wherein the preset flameout cause cannot restore the combustion state by adjusting the operation parameters.

[0008] In an embodiment, before the step of adjusting the operation parameters of the gas water heater based on the preset adjustment range, the method further comprises:

[0009] determining whether the cumulative number of ignition failures or flameouts of the gas water heater within a first preset time period before the current time is greater than or equal to a preset number threshold;

[0010] If not, the cumulative number is cleared.

[0011] If yes, it is determined whether the operating parameter of the gas water heater has been adjusted.

[0012] If not, the step of adjusting the operating parameter of the gas water heater based on the preset adjustment range is performed, and the cumulative number is cleared.

[0013] In an embodiment, the operating parameter includes a gas pressure parameter, and the step of adjusting the operating parameter of the gas water heater based on the preset adjustment range includes:

[0014] In the case where the gas water heater is a preset type of water heater, a lifting amplitude of the gas pressure parameter is determined according to a current fan air volume of the gas water heater and a preset air-fuel ratio range, wherein the lifting amplitude is less than or equal to the preset adjustment range.

[0015] The gas pressure parameter of the gas water heater is lifted based on the lifting amplitude.

[0016] In an embodiment, the operating parameter includes a gas pressure parameter, and the step of adjusting the operating parameter of the gas water heater based on the preset adjustment range includes:

[0017] The gas pressure parameter of the gas water heater is lifted based on a preset lifting amplitude, wherein the preset lifting amplitude is less than or equal to the preset adjustment range.

[0018] In an embodiment, the steps of the gas water heater control method further include:

[0019] In the case where the gas water heater is a preset type of water heater, the current fan air volume of the gas water heater is lifted at the same time as the gas pressure parameter of the gas water heater is lifted.

[0020] Wherein, the air-fuel ratio of the gas water heater after the gas pressure parameter and the current fan air volume are lifted is within a preset air-fuel ratio range.

[0021] In an embodiment, the preset flameout cause includes water flow abnormality.

[0022] The step of determining whether the flameout cause of the gas water heater belongs to a preset flameout cause according to water flow information of the gas water heater includes:

[0023] If there is water flow information lower than the preset water flow threshold value in the water flow information within the second preset time period before the current time, it is determined that the gas water heater is extinguished due to abnormal water flow.

[0024] In an embodiment, the preset extinguishing reasons further include wind blockage and over-time extinguishing, the fan resistance information includes fan resistance, external wind speed and exhaust air pressure;

[0025] According to the fan resistance information and the running time of the gas water heater, it is determined whether the extinguishing reason of the gas water heater belongs to the preset extinguishing reasons.

[0026] If the fan resistance, the external wind speed or the exhaust air pressure is greater than a preset threshold value, it is determined that the gas water heater is extinguished due to wind blockage.

[0027] If the single running time of the gas water heater is greater than a preset running time threshold value, it is determined that the gas water heater is extinguished due to over-time extinguishing.

[0028] In an embodiment, the preset extinguishing reasons further include zero-cold-water function extinguishing, and the water temperature information includes at least user set temperature, inlet water temperature, outlet water temperature, zero-cold-water function maximum set temperature, zero-cold-water function minimum set temperature and extinguishing temperature threshold value.

[0029] According to the water temperature information of the gas water heater, it is determined whether the extinguishing reason of the gas water heater belongs to the preset extinguishing reasons.

[0030] If the user set temperature is greater than the zero-cold-water function maximum set temperature, and the outlet water temperature is greater than the sum of the zero-cold-water function maximum set temperature and the extinguishing temperature threshold value or the inlet water temperature is greater than or equal to the zero-cold-water function maximum set temperature, it is determined that the gas water heater is extinguished due to zero-cold-water function extinguishing.

[0031] If the user set temperature is greater than the zero-cold-water function minimum set temperature, and the outlet water temperature is greater than the sum of the zero-cold-water function minimum set temperature and the extinguishing temperature threshold value or the inlet water temperature is greater than or equal to the zero-cold-water function minimum set temperature, it is determined that the gas water heater is extinguished due to zero-cold-water function extinguishing.

[0032] In addition, the application also provides a gas water heater, which at least includes a memory, a processor and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the gas water heater control method applied to the gas water heater as described above.

[0033] In addition, to achieve the above object, the application further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the gas water heater control method.

[0034] In addition, to achieve the above object, the application further provides a computer program product, comprising a computer program, and the computer program is executed by a processor to implement the steps of the gas water heater control method.

[0035] The application provides a gas water heater control method. When the gas water heater fails to ignite or goes out, whether the out reason of the gas water heater belongs to a preset out reason is judged according to water flow information, fan resistance information, running time or water temperature information of the gas water heater. In the case that the out reason of the gas water heater does not belong to the preset out reason, the running parameter of the gas water heater is adjusted based on a preset adjustment range, wherein the preset out reason cannot be restored to combustion by adjusting the running parameter. In the technical solution of the application, first, it is excluded that the ignition failure or out of the gas water heater belongs to the preset out reason which cannot be excluded by adjusting the running parameter. Then, the air-fuel ratio during the working of the gas water heater is adjusted by adjusting the running parameter of the gas water heater within the preset adjustment range, so that the gas water heater is restored to normal operation and stable combustion is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application together with the specification.

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced with reference to the drawings below. Obviously, for those skilled in the field, the other drawings can be obtained based on these drawings without any creative work.

[0038] Figure 1 The flowchart of the gas water heater control method in the embodiments of the application is shown in the figure.

[0039] Figure 2 The flowchart of the gas water heater control method in the embodiments of the application is shown in the figure.

[0040] Figure 3 The flowchart of the gas water heater control method in the embodiments of the application is shown in the figure.

[0041] Figure 4 The flowchart of the gas water heater control method in the embodiments of the application is shown in the figure.

[0042] Figure 5 Figure 1 is a schematic diagram of a device structure of a hardware operating environment of a gas water heater involved in a control method of the gas water heater in embodiments of the present application.

[0043] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0044] In order to make the above objectives, features and advantages of the present application more apparent, clear and understandable, the technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0045] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application, and are not used to limit the present application.

[0046] In order to better understand the technical solutions of the present application, the specific embodiments will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] The stable operation of the gas water heater is based on the continuous and reliable flame in the ignition and combustion process. The combustion process highly depends on the accurate matching between the air supply amount and the gas supply amount provided by the fan, i.e. the air-fuel ratio, to ensure that the combustion state is always in the stable interval. However, in the actual application environment, this ideal air-fuel ratio faces complex challenges from multiple dimensions, resulting in unstable combustion state and easy occurrence of ignition failure or accidental flame out. These challenges mainly come from two aspects: first, the user end environment, such as the gas pipe network pressure fluctuation faced by the user household during the peak period of gas use, the change of gas calorific value in different regions due to the difference in natural gas extraction process, and the different lengths and directions of the smoke pipe due to the limitation of the house type during installation. These external variables directly and dynamically change the ratio of gas and air required for gas combustion, and the preset fixed control program is difficult to adapt. The second is the internal deviation from production to assembly of the product. The cumulative tolerance of the gas water heater equipment in the production and assembly process is inevitable, and the debugging for efficiency makes each water heater out of the factory have inherent individual differences in the initial setting of wind-gas matching.

[0048] Because various factors above jointly cause the wind-gas matching parameters of the gas water heater under the actual working condition to seriously deviate from the benchmark value calibrated in the ideal laboratory, causing the flame to easily fail to ignite or accidentally extinguish during ignition or continuous combustion due to the inability to adapt to the current working condition. It seriously affects the user's hot water experience, reduces the reliability of the equipment operation, and also poses a potential risk to user safety.

[0049] The technical scheme of the embodiment of the present application is to fundamentally improve the adaptability and reliability of the gas water heater under complex working condition environment, and proposes an anti-flameout strategy that can actively adapt to environmental changes, aiming to develop a gas water heater control method for the anti-accidental flameout capability of the gas water heater. The scheme does not rely on ideal preset parameters, but adjusts the control parameters in real time and dynamically on the device locally during the combustion process, so that it can actively adapt to various actual working conditions such as gas pressure fluctuations, heat value changes, installation differences, etc. The ultimate goal is to improve the first ignition success rate of the gas water heater in the user's home and significantly reduce the probability of accidental flameout during operation, thereby providing users with a more stable, safe, and reliable water experience.

[0050] To achieve the above purpose, the embodiment of the present application provides a gas water heater control method, referring to Figure 1 , Figure 1 is a flowchart of the gas water heater control method embodiment of the present application. The gas water heater control method comprises:

[0051] Step S10, when the gas water heater fails to ignite or extinguishes, according to the water flow information, fan resistance information, running time or water temperature information of the gas water heater, it is judged whether the flameout reason of the gas water heater belongs to the preset flameout reason;

[0052] Gas water heater ignition failure refers to when using the gas water heater in the user's home, the gas water heater will automatically start to ignite. The protection number of general ignition action is 3-6 times of ignition (different machines may have more). That is, the initial ignition fails, and the flame will continue to ignite when the upper limit of the ignition number is reached. The machine will report an ignition failure code (different manufacturers have different expressions for the code of ignition failure, but the purpose is the same), at which time the machine is in a fault interface and cannot produce hot water. Gas water heater flameout refers to the sudden extinguishment of the gas water heater at a certain moment during the combustion operation without any premonition, at which time the machine cannot produce hot water.

[0053] In the embodiment of the present application, it is first necessary to exclude whether the ignition failure or flameout of the gas water heater is caused by normal reasons or functional reasons, which can be collectively referred to as preset flameout reasons. In the case where the preset flameout reasons cause the ignition failure or flameout, the gas water heater cannot be restored to combustion and re-heating by adjusting the operating parameters. Among them, according to the water flow information, fan resistance information, running time or water temperature information of the gas water heater, it can be determined which one of the preset flameout reasons the ignition failure or flameout of the gas water heater belongs to.

[0054] Step S20, in the case where the flameout reason of the gas water heater does not belong to the preset flameout reasons, adjusting the operating parameters of the gas water heater based on the preset adjustment range, wherein the preset flameout reasons cannot be restored to the combustion state by adjusting the operating parameters.

[0055] In the case where it is excluded that the gas water heater does not belong to any one of the preset flameout reasons, it can be understood as effective flameout. In this case, the air-fuel ratio of the gas water heater during operation can be adjusted by adjusting the operating parameters, wherein the operating parameters can be represented by PD (Design Pressure, design pressure). PD is a general symbol expression, which can include various operating parameters, including but not limited to ignition pressure, transmission pressure, maximum load pressure, minimum load pressure, etc., which can be understood as a gas pressure parameter. In addition, when PD is not a gas pressure parameter, it can also be represented as a fan air volume related pressure, which mainly indicates the adjustment change of the air-fuel ratio or the improvement of the combustion energy. Normally, the PD parameter is a parameter determined by the machine engineer through experiments and theoretical verification, which contains a certain stability margin, which can ensure the stable combustion of the gas water heater under a certain gas pressure fluctuation.

[0056] It should be noted that the preset adjustment range is generally constrained by research and design and reliability, and is generally 3 to 5 code intervals, which can increase the combustion firepower after adjusting the operating parameters, and the air volume of the gas water heater can also be within a certain corresponding relationship, thereby ensuring normal combustion.

[0057] The technical scheme of the embodiment of the present application first excludes that the ignition failure or flameout of the gas water heater belongs to the preset flameout reasons which cannot be excluded by adjusting the operating parameters, and then adjusts the air-fuel ratio of the gas water heater during operation by adjusting the operating parameters of the gas water heater within the preset adjustment range, so as to restore the normal operation of the gas water heater and ensure stable combustion.

[0058] The application aims to propose a local adaptive control method of accidental extinguishing ability, so as to improve the ignition success rate and the ability of stable combustion without extinguishing during the starting process and the combustion process of the gas water heater. The automatic parameter optimization of the accidental extinguishing failure of the gas water heater can be performed even if the user's home is not connected, so that the gas water heater can stably operate in various heat value changes and harsh use environments, reduce the frequency and difficulty of after-sales service or after-sales maintenance, and improve the user experience.

[0059] In a feasible embodiment, before the step of adjusting the operating parameter of the gas water heater based on the preset adjustment range, the method can further comprise:

[0060] Step A10, determining whether the cumulative number of ignition failures or extinguishments of the gas water heater within a first preset time length before the current time is greater than or equal to a preset number threshold;

[0061] Step A20, if not, the cumulative number is cleared;

[0062] Step A30, if yes, determining whether the operating parameter of the gas water heater has been adjusted;

[0063] Step A40, if not, performing the step of adjusting the operating parameter of the gas water heater based on the preset adjustment range, and clearing the cumulative number.

[0064] The execution conditions of the above steps A10 to A40 are when the gas water heater fails to ignite or extinguishes. In this case, it is first determined whether the cumulative number of ignition failures or extinguishments of the gas water heater within a first preset time length (such as 24 hours) before the current time is greater than or equal to a preset number threshold, and only when the cumulative number of ignition failures or extinguishments (effective extinguishment) within the first preset time length before the current time is sufficient, the step of automatic adjustment is triggered. In this way, the number of frequent adjustments can be reduced, and unnecessary parameter adjustment caused by accidental extinguishment due to accidental reasons can be avoided.

[0065] In addition, considering accidental extinguishment caused by other safety factors, such as damage of the gas valve after long-term use. Therefore, the operating parameter (such as the gas pressure parameter) cannot be infinitely improved by the software control method, otherwise there may be a safety risk. Generally, a small increase within the preset condition range is performed, which is within the design margin range, and the accidental extinguishment problem can also be improved. Therefore, in the case where the operating parameter of the gas water heater has been adjusted and optimized (such as increasing the gas pressure parameter), it cannot be adjusted continuously.

[0066] Exemplarily, a feasible flow of optimizing the operating parameter (PD parameter) to exclude the accidental extinguishing failure of the gas water heater is as followsFigure 2 As shown, first determine whether an unexpected shutdown fault code occurs, in the case of receiving an unexpected shutdown fault code, determine whether the number of valid shutdowns within 24 hours is ≥ 2, the valid shutdown refers to the shutdown except the preset shutdown reason; If not, the number of valid shutdowns (corresponding to the cumulative number) is cleared, and the timer is cleared; If yes, determine whether the gas water heater has been self-adaptively optimized; If it has been optimized, it will not continue to optimize; If it has not been optimized, optimize the parameter by the formula PD= machine default PD+b, optimize the identification (the identification can be used to determine whether it has been optimized), and clear the number of valid shutdowns, wherein, PD is the gas pressure parameter, and b is within the preset adjustment range.

[0067] In a feasible embodiment, the operating parameter includes a gas pressure parameter, and the step of adjusting the operating parameter of the gas water heater based on the preset adjustment range can include:

[0068] Step S21, in the case of the gas water heater being a preset type water heater, determining a lifting amplitude of the gas pressure parameter according to the current fan air volume of the gas water heater and the preset air-fuel ratio range, wherein the lifting amplitude is less than or equal to the preset adjustment range;

[0069] Step S22, lifting the gas pressure parameter of the gas water heater based on the lifting amplitude.

[0070] The preset type water heater refers to a water heater with certain limitations on the value of air-fuel ratio, for example, a strong drum type gas water heater, after the ratio of air volume and gas (air-fuel ratio) changes, there are resonance and other phenomena, and the ratio of gas and a certain air volume range of the strong drum type gas water heater also needs to meet the emission standard, and such a gas water heater has a pre-set fixed preset air-fuel ratio range. Therefore, when adjusting the gas pressure parameter, it is necessary to ensure that the air-fuel ratio formed by the current fan air volume and the adjusted gas pressure parameter does not exceed the preset air-fuel ratio range, so it is necessary to determine the lifting amplitude of the gas pressure parameter according to the current fan air volume of the gas water heater and the preset air-fuel ratio range, and also to ensure that the lifting amplitude is less than or equal to the preset condition range, and cannot be adjusted too much. Finally, the gas pressure parameter PD of the gas water heater is increased by the lifting amplitude b (the formula is PD=PD+b), and the self-adaptive optimization of the gas pressure parameter of the gas water heater is completed.

[0071] In a feasible embodiment, the operating parameter includes a gas pressure parameter, and the step of adjusting the operating parameter of the gas water heater based on the preset adjustment range can include:

[0072] Step S23, lifting the gas pressure parameter of the gas water heater based on the preset lifting amplitude, wherein the preset lifting amplitude is less than or equal to the preset adjustment range.

[0073] It should be noted that step S23 and steps S21 to S22 belong to parallel technical solutions, that is, in step S20, the operating parameter can be adjusted by the scheme of steps S21 to S22 or the scheme of step S23.

[0074] In the process of adjusting the gas pressure parameter of the gas water heater, the method of increasing a fixed preset increase amplitude can be adopted, as long as the preset increase amplitude is less than or equal to the preset adjustment range, so that the gas pressure parameter of the gas water heater is adjusted within a controllable range, and excessive adjustment does not occur.

[0075] Further, in a feasible embodiment, in the adjustment process of step S23, the steps of the gas water heater control method can further include:

[0076] Step S24, in the case that the gas water heater is a preset type of water heater, increasing the current fan air volume of the gas water heater while increasing the gas pressure parameter of the gas water heater.

[0077] Wherein, the air-fuel ratio of the gas water heater after increasing the gas pressure parameter and the current fan air volume is within a preset air-fuel ratio range.

[0078] In the case that the gas water heater needs to control the value of the air-fuel ratio, in order to ensure that the air-fuel ratio does not change too much, the current fan air volume of the gas water heater is increased while the gas pressure parameter is increased, and the air-fuel ratio of the gas water heater after increasing the gas pressure parameter and the current fan air volume is within a preset air-fuel ratio range.

[0079] In this way, the increase of the gas pressure parameter can be realized, and the air-fuel ratio of the gas water heater after parameter adjustment can be ensured not to fluctuate too much, causing resonance or smoke not meeting emission standards and other adverse effects.

[0080] In a feasible embodiment, the preset flameout reason includes water flow abnormality; the step of determining whether the flameout reason of the gas water heater belongs to the preset flameout reason according to the water flow information of the gas water heater can include:

[0081] Step S21, if there is water flow information lower than a preset water flow threshold in the water flow information within a second preset time length before the current time, it is determined that the flameout reason of the gas water heater is water flow abnormality.

[0082] In the embodiment of the application, water flow abnormality is one of the preset flameout reasons, that is, in the case of low water flow, to avoid dry burning or high water temperature, the gas water heater will be automatically controlled to extinguish due to its own protection mechanism, which belongs to normal reason extinguishing.

[0083] Exemplarily, asFigure 3 As shown, the gas water heater records the water flow information in the normal combustion process, judges whether there is a change from fire to extinguishing state, and the extinguishing state occurs at a moment. At this time, the machine history water flow information is detected, and in the case that the water flow information record is full (that is, the water flow information in the second preset time length has been recorded, and the second preset time length can be 5s), if any point or multiple points of the water flow information satisfy: water flow F < STOP_FLUX (that is, a preset water flow threshold), it is considered that the minimum water flow does not meet the combustion condition and is extinguished, and the extinguishing reason is abnormal water flow. The extinguishing state is not processed and is considered to be a normal reason for extinguishing. If the water flow information record is not full or the water flow information is not less than STOP_FLUX, the extinguishing reason is other reasons.

[0084] Further, in a possible embodiment, the preset extinguishing reason further includes wind blocking extinguishing and timeout extinguishing, and the fan resistance information includes fan resistance, external wind speed and exhaust pressure;

[0085] The step of judging whether the extinguishing reason of the gas water heater belongs to the preset extinguishing reason according to the fan resistance information and the running time of the gas water heater includes:

[0086] In step S22, if the fan resistance, the external wind speed or the exhaust pressure is greater than a preset threshold, it is determined that the extinguishing reason of the gas water heater is wind blocking extinguishing;

[0087] The extinguishing reason of the gas water heater further includes functional extinguishing. For example, when the external wind is large, the water heater sensor detects that the fan resistance increases, and then the wind amount begins to increase. At this time, the wind amount continues to increase, the fan is in the wind resistance state, the external wind speed and the water heater exhaust pressure change, and then there is a possibility of blowing out the flame.

[0088] In the embodiment of the application, the fan resistance, the external wind speed and the exhaust pressure are quantitatively compared by a preset threshold. When a certain parameter is too large to cause ignition failure or extinguishing in the middle, it can be determined that the extinguishing reason of the gas water heater is wind blocking extinguishing, which also belongs to functional extinguishing.

[0089] In step S23, if the single running time of the gas water heater is greater than a preset running time threshold, it is determined that the extinguishing reason of the gas water heater is timeout extinguishing.

[0090] Considering the factors of avoiding safety hazards caused by user forgetting to turn off the water, preventing overheating or maintaining stable operation, the gas water heater sets a preset running time threshold to avoid too long single running time. In this case, the extinguishing belongs to the self-protection mechanism of the gas water heater, and is functional extinguishing, which is a normal situation and does not need to be adjusted by adjusting the running parameters and recovering.

[0091] Further, in a feasible embodiment, the preset flameout cause further includes zero-cold-water function flameout, which also belongs to functional flameout, and the water temperature information at least includes user setting temperature, inlet water temperature, outlet water temperature, zero-cold-water function maximum setting temperature, zero-cold-water function minimum setting temperature, and flameout temperature threshold value;

[0092] According to the water temperature information of the gas water heater, it is determined whether the flameout cause of the gas water heater belongs to the preset flameout cause.

[0093] In step S24, if the user setting temperature is greater than the zero-cold-water function maximum setting temperature, and the outlet water temperature is greater than the sum of the zero-cold-water function maximum setting temperature and the flameout temperature threshold value or the inlet water temperature is greater than or equal to the zero-cold-water function maximum setting temperature, it is determined that the flameout cause of the gas water heater is zero-cold-water function flameout.

[0094] In step S25, if the user setting temperature is greater than the zero-cold-water function minimum setting temperature, and the outlet water temperature is greater than the sum of the zero-cold-water function minimum setting temperature and the flameout temperature threshold value or the inlet water temperature is greater than or equal to the zero-cold-water function minimum setting temperature, it is determined that the flameout cause of the gas water heater is zero-cold-water function flameout.

[0095] It should be noted that, with the improvement of people's living standards, there is a time difference between the time when the gas water heater passes through the household pipeline to the user's water point and the time when the user uses the water. Therefore, more and more gas water heaters have zero-cold-water function, which extracts pipeline water through a water pump to form a local heating cycle of the water heater, so that the user can quickly use hot water function at the water point. Generally, it includes single zero-cold-water or artificial intelligence prediction zero-cold-water, all-weather zero-cold-water, etc. Generally, after the hot water is heated to a certain limit value, the gas water heater stops burning; when the hot water temperature drops to a certain limit value, the gas water heater starts burning.

[0096] Therefore, the automatic flameout that occurs when the gas water heater stops burning during the operation of the zero-cold-water function is zero-cold-water function flameout, which also belongs to functional flameout.

[0097] To determine whether a gas water heater experienced a zero-cold-water function shutdown during operation, firstly, the zero-cold-water function must be activated. Secondly, one of the following conditions must be met: 1) The user-set temperature is greater than the highest set temperature Tset_max_H of the zero-cold-water function, and the outlet water temperature is greater than the sum of the highest set temperature Tset_max_H and the temperature shutdown threshold b; 2) The user-set temperature is greater than the highest set temperature Tset_max_H of the zero-cold-water function, and the inlet water temperature Tin is greater than or equal to the highest set temperature Tset_max_H of the zero-cold-water function; 3) The user-set temperature is greater than the lowest set temperature Tset_min_L of the zero-cold-water function, and the outlet water temperature is greater than the sum of the lowest set temperature Tset_min_L and the temperature shutdown threshold b; 4) The user-set temperature is greater than the lowest set temperature Tset_min_L of the zero-cold-water function, and the inlet water temperature Tin is greater than or equal to the lowest set temperature Tset_min_L of the zero-cold-water function.

[0098] For example, such as Figure 4 As shown, the process for determining whether the flameout is due to the zero cold water function includes: First, recording information on water flow, set temperature, outlet water temperature, and inlet water temperature; determining whether there is a change from flame on to flameout state; after the gas water heater changes from flame on to flameout state, determining whether the information record is full (meaning the record covers a certain time period); if so, determining whether the following conditions are met: set temperature > Tset_max_H && (outlet water temperature > Tset_max_H + a||Tin >= Tset_max_H) or set temperature > Tset_min_L && (outlet water temperature > Tset_min_L + a||Tin >= Tset_min_L). If either condition is met, the flameout is determined to be due to the zero cold water function; if neither condition is met, the flameout is due to other reasons, where 'a' is a preset hysteresis temperature threshold.

[0099] In addition, preset shutdown reasons can also include other functional shutdowns, such as overheat protection shutdown triggered by the outlet water temperature sensor detecting excessively high outlet water temperature (software control), or overheat protection shutdown triggered by the thermostat (hardware control). In the event of any of these functional shutdowns, there is no need to adjust the operating parameters of the gas water heater.

[0100] It should be noted that this example is only for the purpose of assisting in understanding this application and does not constitute a limitation on the gas water heater control method of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0101] The embodiment of the present application further provides a gas water heater, comprising at least one processor; and a memory connected with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the gas water heater control method in the above embodiment.

[0102] Reference will be made to the following description Figure 5 which shows a structural schematic diagram of a gas water heater suitable for implementing the embodiment of the present application. Figure 5 The shown gas water heater is only an example and should not bring any limitation to the function and use range of the embodiment of the present application.

[0103] As Figure 5 shown, the gas water heater can comprise a processing device 101 (for example, a central processing unit, a graphic processing unit, etc.), which can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 102 or loaded from a storage device 103 to a random access memory (RAM) 104. In the RAM 104, various programs and data required for the operation of the gas water heater are also stored. The processing device 101, the ROM 102 and the RAM 104 are connected with each other through a bus 105. An input / output (I / O) interface 106 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 106: input devices 107 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 108 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; the storage device 103 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 109. The communication device 109 can allow the gas water heater to communicate with other devices wirelessly or by wire to exchange data. Although the gas water heater with various systems is shown in the figure, it should be understood that it is not required to implement or have all the shown systems. More or fewer systems can be alternatively implemented or provided.

[0104] In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for performing the methods illustrated by the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network by a communication device, or installed from a storage device 103, or installed from a ROM 102. When the computer program is executed by the processing device 101, the above-mentioned functions defined in the methods of the embodiments of the present application are performed.

[0105] The gas water heater provided by the embodiments of the present application adopts the gas water heater control method in the above embodiments, and can solve the technical problem that the gas water heater is prone to ignition failure and accidental flameout under complex actual working conditions. Compared with the prior art, the gas water heater provided by the embodiments of the present application has the same beneficial effects as the gas water heater control method provided by the above embodiments, and other technical features in the gas water heater are the same as the features disclosed in the above embodiments, and will not be repeated here.

[0106] It should be understood that parts of the embodiments of the present application can be realized by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0107] The above describes only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the above claims.

[0108] The embodiments of the present application also provide a computer readable storage medium storing a computer program capable of running on a processor, and the computer program is used for executing the gas water heater control method in the above embodiments.

[0109] The computer readable storage medium provided by the embodiments of the present application may, for example, be a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system or device, or any combination thereof. More specific examples of the computer readable storage medium may include, but are not limited to, an electric connection with one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read only memory (ROM), an erasable programmable read only memory (EPROM or flash memory), an optical fiber, a portable compact disk read only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the embodiments, the computer readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer readable storage medium can be transmitted by any suitable medium, including but not limited to an electric wire, an optical cable, an RF (Radio Frequency), and the like, or any suitable combination thereof.

[0110] The computer readable storage medium described above may be contained in the gas water heater, or may exist separately without being assembled into the gas water heater.

[0111] The computer readable storage medium described above carries one or more programs, which, when executed by the gas water heater, cause the gas water heater to: when the gas water heater fails to ignite or goes out, determine whether the out-of-fire reason of the gas water heater belongs to a preset out-of-fire reason according to water flow information, fan resistance information, running time, or water temperature information of the gas water heater; and in the case that the out-of-fire reason of the gas water heater does not belong to the preset out-of-fire reason, adjust the operating parameter of the gas water heater based on a preset adjustment range, wherein the preset out-of-fire reason cannot restore the combustion state by adjusting the operating parameter.

[0112] Computer program code for carrying out operations of the present disclosure can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0113] The flow diagrams and the block diagrams in the drawings are illustrations of architectures, functionalities, and operations of possible implementations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flow diagrams or block diagrams can represent a module, a segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may

[0114] The modules involved in the embodiments of the present application can be implemented in the form of software or in the form of hardware. Among them, the name of the module does not constitute a limitation to the unit itself in some cases.

[0115] The computer readable storage medium provided by the embodiments of the present application stores computer readable program instructions for executing the gas water heater control method described above, which can solve the technical problems that the gas water heater is prone to ignition failure and accidental flameout under complex actual working conditions. Compared with the prior art, the beneficial effects of the computer readable storage medium provided by the embodiments of the present application are the same as those of the gas water heater control method provided by the above embodiments, and are not described here.

[0116] The embodiment of the present application further provides a computer program product comprising a computer program, which, when executed by a processor, implements the steps of the gas water heater control method.

[0117] The computer program product provided by the embodiment of the present application can solve the technical problem that the gas water heater is prone to ignition failure and accidental flameout under complex actual working conditions. Compared with the prior art, the beneficial effects of the computer program product provided by the embodiment of the present application are the same as those of the gas water heater control method provided by the above-mentioned embodiment, and are not described herein.

[0118] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, is also included in the patent processing scope of the present application.

Claims

1. A gas water heater control method, characterized by, The gas water heater control method comprises: When the gas water heater fails to ignite or goes out, it is determined whether the out-of-fire cause of the gas water heater belongs to a preset out-of-fire cause according to water temperature information of the gas water heater; In the case where the out-of-fire cause of the gas water heater does not belong to the preset out-of-fire cause, the operating parameter of the gas water heater is adjusted based on a preset adjustment range, wherein the preset out-of-fire cause cannot restore the combustion state by adjusting the operating parameter; The preset out-of-fire cause includes zero-cold-water function out-of-fire, and the water temperature information at least includes user-set temperature, water inlet temperature, water outlet temperature, zero-cold-water function maximum set temperature, zero-cold-water function minimum set temperature, and out-of-fire temperature threshold value; The step of determining whether the out-of-fire cause of the gas water heater belongs to the preset out-of-fire cause according to the water temperature information of the gas water heater comprises: If the user-set temperature is greater than the zero-cold-water function maximum set temperature, and the water outlet temperature is greater than the sum of the zero-cold-water function maximum set temperature and the out-of-fire temperature threshold value or the water inlet temperature is greater than or equal to the zero-cold-water function maximum set temperature, it is determined that the out-of-fire cause of the gas water heater is zero-cold-water function out-of-fire; If the user-set temperature is greater than the zero-cold-water function minimum set temperature, and the water outlet temperature is greater than the sum of the zero-cold-water function minimum set temperature and the out-of-fire temperature threshold value or the water inlet temperature is greater than or equal to the zero-cold-water function minimum set temperature, it is determined that the out-of-fire cause of the gas water heater is zero-cold-water function out-of-fire.

2. The gas water heater control method of claim 1, wherein, Before the step of adjusting the operating parameter of the gas water heater based on the preset adjustment range, the method further comprises: It is determined whether the cumulative number of ignition failures or out-of-fires of the gas water heater within a first preset time length before the current time is greater than or equal to a preset number threshold value; If not, the cumulative number is cleared; If yes, it is determined whether the operating parameter of the gas water heater has been adjusted; If not, the step of adjusting the operating parameter of the gas water heater based on the preset adjustment range is performed, and the cumulative number is cleared.

3. The gas water heater control method as claimed in claim 1, wherein, The operating parameter includes a gas pressure parameter, and the step of adjusting the operating parameter of the gas water heater based on the preset adjustment range comprises: In the case where the gas water heater is a preset type water heater, the lifting amplitude value of the gas pressure parameter of the gas water heater is determined according to the current fan air volume of the gas water heater and a preset air-fuel ratio range, wherein the lifting amplitude value is less than or equal to the preset adjustment range; The gas pressure parameter of the gas water heater is lifted based on the lifting amplitude value.

4. The gas water heater control method as claimed in claim 1, wherein, The operating parameter includes a gas pressure parameter, and the step of adjusting the operating parameter of the gas water heater based on the preset adjustment range comprises: The gas pressure parameter of the gas water heater is lifted based on a preset lifting amplitude value, wherein the preset lifting amplitude value is less than or equal to the preset adjustment range.

5. The gas water heater control method as claimed in claim 4, wherein, The steps of the gas water heater control method further comprise: In the case that the gas water heater is a preset type water heater, the current fan air volume of the gas water heater is increased while the gas pressure parameter of the gas water heater is increased; Wherein, the air-fuel ratio of the gas water heater after increasing the gas pressure parameter and the current fan air volume is within the preset air-fuel ratio range.

6. The gas water heater control method of any one of claims 1 to 5, wherein, The preset flameout cause includes water flow abnormality; According to the water flow information of the gas water heater, it is judged whether the flameout cause of the gas water heater belongs to the preset flameout cause, If there is water flow information lower than the preset water flow threshold in the water flow information within the second preset time length before the current time, it is determined that the flameout cause of the gas water heater is water flow abnormality.

7. The gas water heater control method as claimed in claim 6, wherein, The preset flameout cause also includes wind blocking flameout and overtime flameout; According to the fan resistance information and the running time length of the gas water heater, it is judged whether the flameout cause of the gas water heater belongs to the preset flameout cause, the fan resistance information includes fan resistance, external wind speed and exhaust air pressure, If the fan resistance, the external wind speed or the exhaust air pressure is greater than the preset threshold, it is determined that the flameout cause of the gas water heater is wind blocking flameout; If the single running time length of the gas water heater is greater than the preset running time length threshold, it is determined that the flameout cause of the gas water heater is overtime flameout.

8. A gas water heater, characterised by, The gas water heater at least includes a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program is configured to implement the steps of the gas water heater control method as claimed in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a program for implementing the gas water heater control method, and the program for implementing the gas water heater control method is executed by the processor to implement the steps of the gas water heater control method as claimed in any one of claims 1 to 7.

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