Control method and device of gas water heater

Abstract

The invention provides a control method and device for a gas water heater, and the method comprises the steps that in response to a hot water outlet request of a user, a flow regulating valve is controlled to open a bypass pipeline; cold water of the first flow is conveyed to a heating mechanism through a flow adjusting valve to be heated to the target temperature, and hot water of the target temperature is conveyed to a water outlet through a water outlet pipeline; cold water of the second flow is conveyed to a water outlet through a flow adjusting valve and a bypass pipeline to be mixed with hot water of the target temperature; when the user finishes using water and the gas water heater is in a non-combustion state, responding to the hot water outlet request of the user again, closing the bypass pipeline through the flow regulating valve, and conveying cold water to the heating mechanism through the flow regulating valve to be mixed with the hot water at the target temperature to obtain hot water at a second preset temperature; and conveying the hot water at the second preset temperature to a water outlet through a water outlet pipeline. The gas water heater with the bypass pipeline can solve or improve the problem of'temperature drop of re-discharged water 'of the gas water heater with the bypass pipeline.

Description

Technical Field

[0001] This application belongs to the field of household appliance control, and particularly relates to a control method and device for a gas water heater. Background Art

[0002] In the related art, a gas water heater usually directly heats cold water (such as 20 degrees) to a target temperature (such as 42 degrees).

[0003] However, the heating method of the gas water heater in the related art is a direct heating method, and there is a problem with this heating method: when the user turns on the hot water again after a period of water cut-off, because the gas water heater needs an ignition startup process, the outlet water temperature of the gas water heater first becomes cold and then hot, that is, the phenomenon of "temperature drop when water comes out again" will occur.

[0004] Therefore, how to make the temperature drop of the gas water heater when water comes out again not obvious, or even the user can hardly feel the temperature drop when using water, is extremely important. Summary of the Invention

[0005] In order to solve the above technical problems, this application proposes a control method and device for a gas water heater.

[0006] On the one hand, an embodiment of this application provides a control method for a gas water heater. The gas water heater includes a heating mechanism, an inlet water pipe, an outlet water pipe, a bypass pipe, and a flow regulating valve. The flow regulating valve is respectively connected to the inlet water pipe, the heating mechanism, and the bypass pipe, and the outlet water pipe is respectively connected to the heating structure and the bypass pipe. The control method of the gas water heater includes:

[0007] In response to the user's request for hot water, control the flow regulating valve to open the bypass pipe;

[0008] Transport cold water with a first flow rate through the flow regulating valve to the heating mechanism to be heated to the target temperature, and transport the hot water at the target temperature through the outlet water pipe to the water outlet; transport cold water with a second flow rate through the flow regulating valve and the bypass pipe to the water outlet to be mixed with the hot water at the target temperature to obtain hot water at a first preset temperature;

[0009] When the user finishes using water and the gas water heater is in a non-combustion state, respond to the user's request for hot water again, close the bypass pipe through the flow regulating valve, and transport cold water through the flow regulating valve to be mixed with the hot water at the target temperature to obtain hot water at a second preset temperature;

[0010] Transport the hot water at the second preset temperature to the water outlet through the water outlet pipeline; the temperature difference between the first preset temperature and the second preset temperature is less than the preset temperature threshold.

[0011] In an optional embodiment, when the user finishes using water and the gas water heater is in a non-combustion state, and in response to the user's request for hot water again, closing the bypass pipeline through the flow regulating valve includes:

[0012] When the user finishes using water and the gas water heater is in a non-combustion state, and in response to the user's request for hot water again, ignite the gas water heater;

[0013] When the gas water heater has not been successfully ignited, close the bypass pipeline through the flow regulating valve;

[0014] The method further includes:

[0015] When the gas water heater is successfully ignited, perform the operation of controlling the flow regulating valve to open the bypass pipeline.

[0016] In an optional embodiment, the step of transporting the cold water with the first flow rate to the heating mechanism through the flow regulating valve and heating it to the target temperature includes:

[0017] Obtain the bypass ratio of the flow regulating valve, and determine the first flow rate based on the bypass ratio;

[0018] Determine the first heating energy of the heating mechanism based on the first flow rate, the inlet temperature of the cold water, and the target temperature;

[0019] Transport the cold water with the first flow rate to the heating mechanism through the flow regulating valve;

[0020] Control the heating mechanism to heat the cold water with the first flow rate to the target temperature according to the first heating energy.

[0021] In an optional embodiment, before mixing the cold water with the second flow rate with the hot water at the target temperature through the flow regulating valve and the bypass pipeline and transporting it to the water outlet, the method further includes:

[0022] Obtain the bypass ratio of the flow regulating valve, and determine the initial bypass pipeline flow rate based on the bypass ratio;

[0023] Determine the first heating energy of the heating mechanism based on the first flow rate, the inlet temperature of the cold water, and the target temperature;

[0024] Determine a second heating energy based on the first preset temperature, the inlet water temperature, and the total inlet flow rate of the cold water; the total inlet flow rate is the sum of the first flow rate and the second flow rate;

[0025] Determine the second flow rate based on the first heating energy and the second heating energy;

[0026] Adjust the initial bypass flow rate to the second flow rate through the flow regulating valve.

[0027] In an alternative embodiment, the determining the first heating energy of the heating mechanism based on the first flow rate, the inlet water temperature of the cold water, and the target temperature includes:

[0028] Determine a first difference between the target temperature and the inlet water temperature;

[0029] Determine the product of the first difference and the first flow rate to obtain the first heating energy.

[0030] In an alternative embodiment, the determining the second heating energy based on the first preset temperature, the inlet water temperature, and the total inlet flow rate of the cold water includes:

[0031] Determine a second difference between the first preset temperature and the inlet water temperature;

[0032] Determine the product of the second difference and the total inlet flow rate to obtain the second heating energy.

[0033] In an alternative embodiment, the determining the second flow rate based on the first heating energy and the second heating energy includes:

[0034] Establish an equation relationship between the first heating energy and the second heating energy;

[0035] Determine the second flow rate based on the equation relationship.

[0036] In an alternative embodiment, the method further includes:

[0037] Determine whether the heating mechanism is maintained at the target temperature;

[0038] If so, maintain the current combustion state of the heating mechanism;

[0039] If not, adjust the bypass ratio, and re-determine the first flow rate and the second flow rate based on the adjusted bypass ratio until the heating structure is maintained at the target temperature.

[0040] In an alternative embodiment, the controlling the flow regulating valve to open the bypass pipeline in response to a user's request for hot water includes:

[0041] In response to a user's request for hot water, ignite the gas water heater;

[0042] When the ignition of the gas water heater is successful, control the flow regulating valve to open the bypass pipeline.

[0043] On the other hand, an embodiment of the present application further provides a control device for a gas water heater. The gas water heater includes a heating mechanism, a water inlet pipeline, a water outlet pipeline, a bypass pipeline, and a flow regulating valve. The flow regulating valve is respectively communicated with the water inlet pipeline, the heating mechanism, and the bypass pipeline. The water outlet pipeline is respectively communicated with the heating structure and the bypass pipeline. The control device of the gas water heater includes:

[0044] A response module, configured to control the flow regulating valve to open the bypass pipeline in response to a user's request for hot water;

[0045] A conveying and mixing module, configured to convey cold water with a first flow rate to the heating mechanism through the flow regulating valve to be heated to a target temperature, and convey the hot water at the target temperature to the water outlet through the water outlet pipeline; convey cold water with a second flow rate to the water outlet through the flow regulating valve and the bypass pipeline to be mixed with the hot water at the target temperature to obtain hot water at a first preset temperature;

[0046] A re - response module, configured to, when the user finishes using water and the gas water heater is in a non - burning state, re - respond to the user's request for hot water, close the bypass pipeline through the flow regulating valve, and convey cold water to the heating mechanism through the flow regulating valve to be mixed with the hot water at the target temperature to obtain hot water at a second preset temperature;

[0047] A hot - water conveying module, configured to convey the hot water at the second preset temperature to the water outlet through the water outlet pipeline; the temperature difference between the first preset temperature and the second preset temperature is less than a preset temperature threshold.

[0048] In an optional embodiment, the re - response module includes:

[0049] A first ignition unit, configured to, when the user finishes using water and the gas water heater is in a non - burning state, re - respond to the user's request for hot water and ignite the gas water heater;

[0050] A bypass - pipeline closing unit, configured to close the bypass pipeline through the flow regulating valve when the ignition of the gas water heater has not been successful;

[0051] Correspondingly, the above - mentioned device further includes:

[0052] An execution unit, configured to perform an operation of controlling the flow regulating valve to open the bypass pipeline when the gas water heater ignites successfully.

[0053] In an optional embodiment, the conveying and mixing module includes:

[0054] A first flow rate determining unit, configured to obtain the bypass ratio of the flow regulating valve and determine the first flow rate based on the bypass ratio;

[0055] A first heating energy determining unit, configured to determine the first heating energy of the heating mechanism based on the first flow rate, the inlet water temperature of the cold water, and the target temperature;

[0056] A first flow rate cold water conveying unit, configured to convey cold water with a first flow rate to the heating mechanism through the flow regulating valve;

[0057] A first flow rate cold water heating unit, configured to control the heating mechanism to heat the cold water with the first flow rate to the target temperature according to the first heating energy.

[0058] In an optional embodiment, the above device further includes:

[0059] An initial bypass pipeline flow rate determining unit, configured to obtain the bypass ratio of the flow regulating valve and determine the initial bypass pipeline flow rate based on the bypass ratio;

[0060] An energy determining unit, configured to determine the first heating energy of the heating mechanism based on the first flow rate, the inlet water temperature of the cold water, and the target temperature;

[0061] A second heating energy determining unit, configured to determine a second heating energy based on the first preset temperature, the inlet water temperature, and the total inlet water flow rate of the cold water; the total inlet water flow rate is the sum of the first flow rate and the second flow rate;

[0062] A second flow rate determining unit, configured to determine the second flow rate according to the first heating energy and the second heating energy;

[0063] A flow rate adjusting unit, configured to adjust the initial bypass flow rate to the second flow rate through the flow regulating valve.

[0064] In an optional embodiment, the first heating energy determining unit includes:

[0065] A first difference determining subunit, configured to determine a first difference between the target temperature and the inlet water temperature;

[0066] A first product processing unit, configured to determine the product of the first difference and the first flow rate to obtain the first heating energy.

[0067] In an alternative embodiment, the second heating energy determination unit includes:

[0068] A second difference determination subunit, configured to determine a second difference between the first preset temperature and the inlet water temperature;

[0069] A second product processing unit, configured to determine the product of the second difference and the total inlet water flow rate to obtain the second heating energy.

[0070] In an alternative embodiment, the second flow rate determination unit includes:

[0071] An equation relationship establishment subunit, configured to establish an equation relationship between the first heating energy and the second heating energy;

[0072] An equation relationship processing subunit, configured to determine the second flow rate based on the equation relationship.

[0073] In an alternative embodiment, the above device further includes:

[0074] A target temperature judgment unit, configured to determine whether the heating mechanism is maintained at the target temperature;

[0075] A combustion state maintenance unit, configured to, if so, maintain the current combustion state of the heating mechanism;

[0076] A bypass ratio re-determination unit, configured to, if not, adjust the bypass ratio, and re-determine the first flow rate and the second flow rate based on the adjusted bypass ratio until the heating structure is maintained at the target temperature.

[0077] In an alternative embodiment, the response module includes:

[0078] A second ignition unit, configured to ignite the gas water heater in response to a user's request for hot water;

[0079] A bypass pipeline opening unit, configured to control the flow regulating valve to open the bypass pipeline when the gas water heater is successfully ignited.

[0080] On the other hand, an embodiment of the present application further provides an electronic device, which includes a processor and a memory. At least one instruction or at least one program segment is stored in the memory, and at least one instruction or at least one program segment is loaded and executed by the processor to implement the control method of a gas water heater as described above.

[0081] On the other hand, an embodiment of the present application also provides a computer-readable storage medium, in which at least one instruction or at least one program segment is stored, and the at least one instruction or at least one program segment is loaded and executed by a processor to implement the control method of a gas water heater as described above.

[0082] On the other hand, an embodiment of the present application also provides a computer program product, which implements the control method of a gas water heater as described above when executed by a processor.

[0083] The present application provides a control method and device for a gas water heater. The method controls the flow regulating valve to open in response to a user's request for hot water, conveys cold water with a first flow rate to the heating mechanism through the flow regulating valve to be heated to a target temperature, and conveys the hot water at the target temperature to the water outlet through the water outlet pipeline. Cold water with a second flow rate is conveyed to the water outlet to be mixed with the hot water at the target temperature to obtain hot water at a first preset temperature. At this time, since the heating mechanism has been heated to the target temperature, there is high-temperature waste heat in the heating mechanism. When the user finishes using water for a period of time and then opens the hot water again, since the gas water heater is in a non-combustion state at this time and it takes a certain time to successfully ignite, the flow regulating valve can be controlled to close the bypass pipeline at this time, and cold water is conveyed to the heating mechanism through the flow regulating valve to be mixed with the high-temperature waste heat (i.e., hot water at the target temperature) in the heating mechanism to obtain hot water at a second preset temperature. The difference between the second preset temperature and the first preset temperature is less than a preset temperature threshold, thereby greatly solving or improving the problem of "temperature drop of the re-emerging water" of the gas water heater with a bypass pipeline, achieving the effect that the temperature drop of the re-emerging water of the water heater is not obvious, and even the user can hardly feel the temperature drop phenomenon when using water, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0085] Figure 1 is a schematic structural diagram of a gas water heater provided by an embodiment of the present application.

[0086] Figure 2 is a schematic flow chart of a control method for a gas water heater provided by an embodiment of the present application Figure 1 .

[0087] Figure 3It is a schematic flow chart of delivering cold water with a first flow rate to a heating mechanism through a flow regulating valve and heating it to a target temperature provided by an embodiment of the present application.

[0088] Figure 4 It is a schematic flow chart of determining a second flow rate of cold water input into a bypass pipe shown according to an exemplary embodiment.

[0089] Figure 5 It is a schematic flow chart of a control method for a gas water heater provided by an embodiment of the present application Figure 2 。

[0090] Figure 6 An embodiment of the present application also provides a block diagram of a control device for a gas water heater.

[0091] Figure 7 It is a hardware structure block diagram of a server for a control method of a gas water heater provided by an embodiment of the present application. Detailed implementation manners

[0092] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0093] It should be noted that the terms "first", "second", etc. in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. Thus, features defined with "first", "second" may explicitly or implicitly include one or more of such features. In the description of this embodiment, unless otherwise stated, the meaning of "a plurality" is two or more. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or server that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0094] Please refer to Figure 1, which shows a schematic structural diagram of a gas water heater provided by an embodiment of the present application. The gas water heater includes a heating mechanism, a water inlet pipeline, a water outlet pipeline, a bypass pipeline, and a flow regulating valve. The heating mechanism has a water inlet end and a water outlet end. The water inlet end of the flow regulating valve is communicated with the water inlet pipeline, and the two water outlet ends of the flow regulating valve are respectively communicated with the water inlet end of the heating mechanism and the water inlet end of the bypass pipeline. The water outlet pipeline is respectively communicated with the water outlet end of the heating mechanism and the bypass pipeline.

[0095] A circulation pump, a water inlet temperature sensor, and a water flow sensor are provided on the water inlet pipeline. When the gas water heater is in use, the water flow signal in the pipeline is detected by the water flow sensor and then transmitted to the power board, and the power board controls whether the water heater heats up.

[0096] A bypass pipe water flow sensor is provided on the bypass pipeline for detecting the water flow signal in the bypass pipe.

[0097] A temperature relay, an igniter, and a water outlet temperature sensor are provided on the water outlet pipeline.

[0098] The gas water heater further includes a gas inlet pipeline, and a main valve, a proportional valve, a sectional valve, etc. are provided on the gas inlet pipeline.

[0099] Optionally, the heating structure can be a heat exchanger, and the flow regulating valve can be a water volume servo.

[0100] It should be noted that Figure 1 The structure shown is only for illustration, and a control method for a gas water heater provided by an embodiment of the present application is also applicable to gas water heaters with other structures.

[0101] The following introduces a control method for a gas water heater provided by an embodiment of the present application. Figure 2 is a flowchart showing a control method for a gas water heater provided by an embodiment of the present application. Figure 1 , this specification provides method operation steps as described in the embodiment or flowchart, but based on routine or non-creative labor, there may be more or fewer operation steps. The step sequence listed in the embodiment is only one way among the execution sequences of numerous steps and does not represent the only execution sequence. When the actual system or fourth server product executes, it can be executed in the method sequence shown in the embodiment or the drawings or executed in parallel (for example, in an environment of parallel processors or multi-threaded processing). Specifically, as Figure 2 shown, the method may include:

[0102] S11. In response to the user's request for hot water, control the flow regulating valve to open the bypass pipeline.

[0103] In the embodiment of the present application, when the user turns on the hot water faucet, a request for the user to get hot water can be sent to the server corresponding to the gas water heater. In response to this request, when it is determined that the gas water heater has successfully ignited, the server controls the flow regulating valve to open the bypass pipeline.

[0104] S13. Deliver cold water with a first flow rate to the heating mechanism through the flow regulating valve, heat it to the target temperature, and deliver the hot water at the target temperature to the water outlet through the water outlet pipeline; deliver cold water with a second flow rate to the water outlet through the flow regulating valve and the bypass pipeline to be mixed with the hot water at the target temperature to obtain hot water at a first preset temperature.

[0105] In the embodiment of the present application, when the flow regulating valve is open, the first flow rate of cold water flowing to the heating mechanism and the second flow rate of cold water flowing to the bypass pipeline can be determined according to the corresponding bypass ratio. Then, cold water with a certain flow rate is delivered to the heating mechanism through the flow regulating valve and heated to the target temperature, and the hot water at the target temperature is delivered to the water outlet through the water outlet pipeline. At the same time, cold water with the second flow rate is delivered to the water outlet through the flow regulating valve and the bypass pipeline. Finally, the hot water at the target temperature and the cold water with the second flow rate are mixed at the water outlet to obtain water at a first preset temperature. This first preset temperature is lower than the target temperature.

[0106] Optionally, the target temperature can be set according to the model of the gas water heater. For example, the target temperature can be 50 degrees, and the first preset temperature can be 42 degrees.

[0107] S15. When the user finishes using water and the gas water heater is in a non - burning state, in response to the user's request for hot water again, close the bypass pipeline through the flow regulating valve, and deliver cold water to the heating mechanism through the flow regulating valve to be mixed with the hot water at the target temperature to obtain hot water at a second preset temperature.

[0108] S17. Deliver the hot water at the second preset temperature to the water outlet through the water outlet pipeline; the temperature difference between the first preset temperature and the second preset temperature is less than the preset temperature threshold.

[0109] In an embodiment of the present application, when the user finishes using hot water, that is, when the user closes the hot water faucet, the gas water heater is in a non-combustion state at this time. If the user opens the hot water faucet again at this time, since the water heater is in a non-combustion state at this time and it takes a certain amount of time to successfully ignite, the flow control valve can be controlled to close the bypass pipeline at this time, and cold water is conveyed to the heating mechanism through the flow control valve, and is mixed with the high-temperature waste heat (i.e., hot water at the target temperature) in the heating mechanism to obtain hot water at a second preset temperature, and the hot water at the second preset temperature is conveyed to the water outlet through the water outlet pipeline. The temperature difference between the first preset temperature and the second preset temperature is less than a preset temperature threshold.

[0110] Optionally, the preset temperature threshold can be 2 degrees. For example, if the first preset temperature is 42 degrees, then the second preset temperature threshold can be greater than 40 degrees and less than 42 degrees. That is, the temperature drop of the hot water output by the gas water heater in the embodiment of the present application is approximately 1 degree - 2 degrees. Compared with the temperature drop of more than 10 degrees of the hot water output in the related art, the embodiment of the present application greatly solves or improves the problem of "temperature drop of the hot water output again" of the gas water heater with a bypass pipeline, achieving the effect that the temperature drop of the hot water output again by the water heater is not obvious, and even the user hardly feels the temperature drop phenomenon when using water; in addition, the embodiment of the present application only needs to add a bypass pipeline to achieve this, so that the problem of "temperature drop of the hot water output again" of the gas water heater with a bypass pipeline is solved or improved at low cost without adding too much additional hardware.

[0111] In an alternative embodiment, in the above step S11, the controlling the flow control valve to open the bypass pipeline in response to the user's request for hot water may include:

[0112] In response to the user's request for hot water, ignite the gas water heater.

[0113] When the gas water heater ignites successfully, control the flow control valve to open the bypass pipeline.

[0114] In this embodiment, when the user opens the hot water faucet to send a request for hot water, the server can control the flow regulating valve to close the bypass pipeline, then ignite the gas water heater, and determine whether the gas water heater ignites successfully. If so, control the flow regulating valve to open the bypass pipeline. If not, continue to ignite the gas water heater until the ignition is successful. Thus, instead of controlling the flow regulating valve to open the bypass pipeline when receiving the user's request for hot water, the flow regulating valve is controlled to open the bypass pipeline only when the gas water heater ignites successfully, avoiding the problem of reduced service life of the flow regulating valve caused by frequent opening and closing of the flow regulating valve, improving the reliability and accuracy of opening the bypass pipeline through the flow regulating valve, and thus improving the control accuracy of the hot water output of the gas water heater.

[0115] In an alternative embodiment, Figure 3 is a schematic flow chart provided by an embodiment of the present application for delivering cold water with a first flow rate to a heating mechanism through a flow regulating valve and heating it to a target temperature, as Figure 3 shown. In the above step S13, delivering cold water with a first flow rate to the heating mechanism through the flow regulating valve and heating it to a target temperature may include:

[0116] S131. Obtain the bypass ratio of the flow regulating valve, and determine the first flow rate based on the bypass ratio.

[0117] S133. Determine the first heating energy of the heating mechanism based on the first flow rate, the inlet temperature of the cold water, and the target temperature.

[0118] S135. Deliver cold water with a first flow rate to the heating mechanism through the flow regulating valve.

[0119] S137. Control the heating mechanism to heat the cold water with the first flow rate to the target temperature according to the first heating energy.

[0120] In this embodiment, after controlling the flow regulating valve to open the bypass pipeline, the bypass ratio of the flow regulating valve can be determined. Among them, the bypass ratio refers to the ratio of the flow rate through the bypass pipeline to the flow rate through the main pipeline. Among them, the main pipeline refers to the pipeline for inputting cold water into the heating mechanism for heating.

[0121] It should be noted that the bypass ratio can be preset, and it can be adjusted in real time or regularly during the operation of the gas water heater.

[0122] After determining the bypass ratio, the first flow rate of the main pipeline can be determined according to the bypass ratio, and heating energy analysis is performed on the first flow rate, the inlet temperature of the cold water, and the target temperature to determine the energy required to heat the cold water with the first flow rate from the inlet temperature to the target temperature, thereby obtaining the first heating energy. Then, the cold water with the first flow rate is conveyed to the heating mechanism through the flow regulating valve, and the heating mechanism is controlled to heat the cold water with the first flow rate to the target temperature according to the first heating energy.

[0123] Since the inlet temperature and the target temperature can accurately reflect the difference between the cold water and the hot water at the target temperature, and the first flow rate can accurately reflect the water flow rate flowing through the heating mechanism, therefore, through the first flow rate, the inlet temperature of the cold water, and the target temperature, the heating energy required to heat the water with the first flow rate to the target temperature can be accurately determined. By heating the cold water with the first flow rate according to the first heating energy, it can ensure that the water in the heating mechanism is accurately maintained at the target temperature, thereby improving the temperature control accuracy of the gas water heater; in addition, maintaining the heating mechanism at the target temperature can ensure that the cold water is mixed with the high-temperature waste heat when the water comes out again, thus greatly solving or improving the problem of "temperature drop when the water comes out again" of the gas water heater with a bypass pipeline.

[0124] In an optional embodiment, before the cold water with the second flow rate is conveyed to the water outlet through the flow regulating valve and the bypass pipeline to be mixed with the hot water at the target temperature, the method further includes: S12. Determine the second flow rate of the cold water input into the bypass pipe. Figure 4 It is a schematic flowchart of a method for determining the second flow rate of the cold water input into the bypass pipe shown according to an exemplary embodiment, as Figure 4 shown, the above step S12 may include:

[0125] S121. Obtain the bypass ratio of the flow regulating valve, and determine the initial bypass pipe flow rate based on the bypass ratio.

[0126] S123. Determine the first heating energy of the heating mechanism based on the first flow rate, the inlet temperature of the cold water, and the target temperature.

[0127] S125. Determine the second heating energy based on the first preset temperature, the inlet temperature, and the total inlet flow rate of the cold water; the total inlet flow rate is the sum of the first flow rate and the second flow rate.

[0128] S127. Determine the second flow rate according to the first heating energy and the second heating energy.

[0129] S129. Adjust the initial bypass flow rate to the second flow rate through the flow regulating valve.

[0130] Optionally, in the above step S121, the initial bypass pipe flow rate flowing into the bypass pipe can be determined through a preset bypass ratio.

[0131] Optionally, in the above step S123, heating energy analysis can be performed on the first flow rate, the inlet water temperature of the cold water, and the target temperature to determine the energy required to heat the cold water with the first flow rate from the inlet water temperature to the target temperature, thereby obtaining the first heating energy.

[0132] Optionally, in the above step S125, heating energy analysis can be performed on the first preset temperature, the inlet water temperature, and the total inlet flow rate of the cold water to determine the second energy required to heat the cold water corresponding to the total inlet flow rate from the inlet water temperature to the first preset temperature. Wherein, the total inlet flow rate is the sum of the first flow rate and the second flow rate.

[0133] Optionally, in the above step S127, since the first heating energy is known and the first flow rate among the first preset temperature, the inlet water temperature, and the total inlet flow rate of the cold water is known, the unknown second flow rate can be calculated based on these known data.

[0134] Optionally, in the above step S129, after calculating the second flow rate, the initial bypass pipe flow rate can be adjusted to the second flow rate through a flow regulating valve.

[0135] Since the first heating energy can accurately reflect the energy required to heat the cold water from the inlet water temperature to the target temperature, and the second heating energy can accurately reflect the second energy required to heat the cold water corresponding to the total inlet flow rate from the inlet water temperature to the first preset temperature, by analyzing the known parameters in the first heating energy and the second heating energy, the second flow rate of the water flowing through the bypass pipe can be accurately determined, so that hot water at the first preset temperature can be accurately discharged from the water outlet according to the user's hot water demand.

[0136] In an optional embodiment, in the above step S133 and the above step S123, the determining of the first heating energy of the heating mechanism based on the first flow rate, the inlet water temperature of the cold water, and the target temperature may include:

[0137] Determine a first difference between the target temperature and the inlet water temperature.

[0138] Determine the product of the first difference and the first flow rate to obtain the first heating energy.

[0139] In an implementation manner, the first difference between the target temperature and the inlet water temperature can be calculated, and the product of the first difference and the first flow rate can be calculated to obtain the first heating energy. The calculation formula can be as follows:

[0140] P1 = (T_target - T_inlet) * V0;

[0141] Wherein, P1 refers to the first heating energy, T_target refers to the target temperature, T_inlet refers to the inlet water temperature, and V0 refers to the first flow rate.

[0142] It should be noted that since the first difference refers to the temperature difference between the inlet water temperature and the target temperature, the unit of (T_target - T_inlet) * V0 is joule, representing energy.

[0143] Since the first difference can accurately reflect the difference between cold water and hot water at the target temperature, and the first flow rate can accurately reflect the water flow rate flowing through the heating mechanism, therefore, the product of the first flow rate and the first difference can accurately determine the first heating energy required to heat the water with the first flow rate from the inlet water temperature to the target temperature, thereby ensuring that the water in the heating mechanism is accurately maintained at the target temperature, and further improving the temperature control accuracy of the gas water heater; in addition, maintaining the heating mechanism at the target temperature can ensure that the high-temperature waste heat is used to mix cold water when the water comes out again, thus greatly solving or improving the problem of "temperature drop when the water comes out again" of the gas water heater with a bypass pipeline.

[0144] In another embodiment, respective corresponding weights can also be assigned to the target temperature and the inlet water temperature, calculate the first product between the target temperature and the corresponding weight, calculate the second product between the inlet water temperature and the corresponding weight, calculate the difference between the first product and the second product, and calculate the product of the difference and the first flow rate to obtain the first heating energy.

[0145] In an alternative embodiment, in the above step S123, determining the second heating energy based on the first preset temperature, the inlet water temperature, and the total inlet flow rate of the cold water includes:

[0146] Determine the second difference between the first preset temperature and the inlet water temperature.

[0147] Determine the product of the second difference and the total inlet flow rate to obtain the second heating energy.

[0148] In one way, the second difference between the first preset temperature and the inlet water temperature can be calculated, and then the product of the second difference and the total inlet flow rate can be calculated to obtain the second heating energy required to heat the water with the total flow rate at the inlet water temperature to the first preset temperature. The specific calculation formula can be as follows:

[0149] P2 = (T_set - T_inlet) * (V0 + V1_target);

[0150] Wherein, P2 refers to the second heating energy, T set refers to the first preset temperature, T inlet refers to the inlet water temperature, V0 + V1 target refers to the total inlet water flow rate, and V1 target refers to the second flow rate.

[0151] It should be noted that since the second difference refers to the temperature difference between the first preset temperature and the inlet water temperature, the unit of (T set - T inlet) * (V0 + V1 target) is joule, which represents energy.

[0152] Since the second difference can accurately reflect the difference between cold water and hot water at the first preset temperature, and the total inlet water flow rate can accurately reflect the water flow rate through the main pipeline and the bypass pipeline, therefore, the product of the total inlet water flow rate and the second difference can accurately determine the second heating energy required for the heating structure to heat the water with the total inlet water flow rate from the inlet water temperature to the first preset temperature. Through this second heating energy, it can be ensured that hot water at the first preset temperature can be obtained at the water outlet, thus improving the temperature control accuracy of the gas water heater.

[0153] In another embodiment, weights can also be assigned to the first preset temperature and the inlet water temperature respectively. Calculate the third product between the first preset temperature and the corresponding weight, calculate the fourth product between the inlet water temperature and the corresponding weight, calculate the difference between the third product and the fourth product, and calculate the product of the difference and the total inlet water flow rate to obtain the second heating energy.

[0154] In an alternative embodiment, in the above step S124, determining the second flow rate according to the first heating energy and the second heating energy may include:

[0155] Establish an equation relationship between the first heating energy and the second heating energy.

[0156] Determine the second flow rate based on the equation relationship.

[0157] In one way, according to the principle of energy conservation, the first heating energy can be made equal to the second heating energy, thereby establishing an equation relationship between the first heating energy and the second heating energy, that is, P1 = P2. The specific equation relationship can be as follows:

[0158] (T target - T inlet) * V0 = (T set - T inlet) * (V0 + V1 target);

[0159] Since the first heating energy, the first preset temperature, the inlet water temperature, the first flow rate, and the target temperature are all known, substituting the known parameters into the above equation can accurately obtain the second flow rate, that is, V1 target.

[0160] In another way, respective corresponding weights can also be assigned to the first heating energy and the second heating energy, calculate the product of the first heating energy and the corresponding weight, calculate the product of the second heating energy and the corresponding weight, establish an equation relationship where the product of the first heating energy and the corresponding weight is equal to the second heating energy and the corresponding weight, and determine the second flow rate based on this equation relationship.

[0161] In an alternative embodiment, after the above step S13, the above method further includes:

[0162] Determine whether the heating mechanism is maintained at the target temperature.

[0163] If so, maintain the current combustion state of the heating mechanism.

[0164] If not, adjust the bypass ratio, and re-determine the first flow rate and the second flow rate based on the adjusted bypass ratio until the heating structure is maintained at the target temperature.

[0165] In the embodiment of the present application, it is necessary to maintain the water in the heating structure at the target temperature. After heating the water in the heating mechanism to the target temperature, it is possible to judge in real time or at regular intervals whether the water in the heating mechanism is maintained at the target temperature. If so, maintain the current combustion state of the heating mechanism. If not, the bypass ratio can be adjusted, the first flow rate and the second flow rate are re-determined based on the bypass ratio, the first heating energy of the heating mechanism is re-determined based on the first flow rate, the inlet water temperature and the target temperature, and the heating mechanism is controlled to heat according to the re-determined first heating energy until the heating structure is maintained at the target temperature. Thus, the temperature of the heating mechanism is controlled in real time or at regular intervals at the target temperature by adjusting the bypass ratio, ensuring that the user can accurately obtain hot water at the first preset temperature and improving the user experience; in addition, maintaining the heating mechanism at the target temperature can ensure that high-temperature waste heat is used to mix cold water when the water comes out again, thus greatly solving or improving the problem of "temperature drop when the water comes out again" of gas water heaters with bypass pipelines.

[0166] In an alternative embodiment, in the above step S15, when the user's water usage ends and the gas water heater is in a non-combustion state, and in response to the user's request for hot water again, closing the bypass pipeline through the flow regulating valve may include:

[0167] When the user's water usage ends and the gas water heater is in a non-combustion state, and in response to the user's request for hot water again, ignite the gas water heater.

[0168] When the gas water heater has not been successfully ignited, close the bypass pipeline through the flow regulating valve.

[0169] Accordingly, the above method further includes:

[0170] When the gas water heater ignites successfully, perform the operation of controlling the flow regulating valve to open the bypass pipeline.

[0171] In this embodiment, when the user finishes using water and the gas water heater is in a non-combustion state, if a request for hot water is received again from the user, the gas water heater can be ignited first. If the ignition is not successful, it indicates that the gas water heater is still in a non-combustion state at this time. The flow regulating valve can be controlled to close the bypass pipeline, and the operation of delivering cold water through the flow regulating valve to the heating mechanism to be mixed with hot water at the target temperature to obtain hot water at the second preset temperature; and delivering the hot water at the second preset temperature through the water outlet pipeline to the water outlet can be performed.

[0172] When the gas water heater ignites successfully, perform the operation of controlling the flow regulating valve to open the bypass pipeline until cold water with a second flow rate is delivered through the flow regulating valve and the bypass pipeline to the water outlet to be mixed with the hot water at the target temperature to obtain hot water at the first preset temperature.

[0173] Thus, based on whether the gas water heater ignites successfully, it can be determined whether to open or close the bypass pipeline through the flow regulating valve, so as to determine whether it is necessary to allow water to flow through the bypass pipeline. When the ignition is not successful, the bypass pipeline can be closed, greatly solving or improving the problem of "temperature drop of the re-outlet water" of the gas water heater with a bypass pipeline, and further improving the temperature control accuracy of the gas water heater.

[0174] The following provides an overall description of the control method of the gas water heater provided by the embodiments of the present application:

[0175] Figure 5 is a schematic flow chart of a control method of a gas water heater provided by an embodiment of the present application Figure 2 , as Figure 5 shown, the control method of this gas water heater includes:

[0176] 1) In response to the user's request for hot water, ignite the gas water heater.

[0177] 2) Determine whether the gas water heater ignites successfully. If so, control the flow regulating valve to open the bypass pipeline. If not, continue to ignite the gas water heater.

[0178] 2) When controlling the flow regulating valve to open the bypass pipeline, obtain the bypass ratio of the regulating valve, and determine the first flow rate and the initial bypass pipeline flow rate based on the bypass ratio.

[0179] 3) Determine the first heating energy of the heating mechanism based on the first flow rate, the inlet temperature of the cold water, and the target temperature.

[0180] 4) Determine the second heating energy based on the first preset temperature, the inlet temperature, and the total inlet flow rate of the cold water; the total inlet flow rate is the sum of the first flow rate and the second flow rate; determine the second flow rate according to the first heating energy and the second heating energy.

[0181] 5) Adjust the initial bypass flow rate to the second flow rate through the flow rate regulating valve.

[0182] 6) Deliver the cold water with the first flow rate to the heating mechanism through the flow rate regulating valve to be heated to the target temperature, and deliver the hot water at the target temperature to the water outlet through the water outlet pipeline; deliver the cold water with the second flow rate to the water outlet through the flow rate regulating valve and the bypass pipeline to be mixed with the hot water at the target temperature to obtain hot water at the first preset temperature.

[0183] 7) Determine whether the gas water heater is maintained at the target temperature. If so, maintain the current combustion state. If not, adjust the bypass ratio, and re-determine the first flow rate and the second flow rate based on the adjusted bypass ratio until the heating structure is maintained at the target temperature.

[0184] 8) When the user finishes using water and the gas water heater is in a non-combustion state, re-respond to the user's request for hot water, and close the bypass pipeline through the flow rate regulating valve; deliver the cold water to the heating mechanism through the flow rate regulating valve to be mixed with the hot water at the target temperature to obtain hot water at the second preset temperature.

[0185] 9) Deliver the hot water at the second preset temperature to the water outlet through the water outlet pipeline; the temperature difference between the first preset temperature and the second preset temperature is less than the preset temperature threshold.

[0186] On the other hand, as Figure 6 shown, an embodiment of the present application further provides a control device for a gas water heater. The gas water heater includes a heating mechanism, a water inlet pipeline, a water outlet pipeline, a bypass pipeline, and a flow rate regulating valve. The flow rate regulating valve is respectively communicated with the water inlet pipeline, the heating mechanism, and the bypass pipeline. The water outlet pipeline is respectively communicated with the heating structure and the bypass pipeline. The device includes:

[0187] A response module 21, configured to control the flow rate regulating valve to open the bypass pipeline in response to the user's request for hot water.

[0188] A delivery and mixing module 23 for delivering cold water with a first flow rate to the heating mechanism through the flow regulating valve, heating it to a target temperature, and delivering hot water at the target temperature to the water outlet through the water outlet pipe; delivering cold water with a second flow rate to the water outlet through the flow regulating valve and the bypass pipe to mix with the hot water at the target temperature to obtain hot water at a first preset temperature;

[0189] A re - response module 25 for, when the user finishes using water and the gas water heater is in a non - combustion state, re - responding to the user's request for hot water, closing the bypass pipe through the flow regulating valve, and delivering cold water through the flow regulating valve to the heating mechanism to mix with the hot water at the target temperature to obtain hot water at a second preset temperature;

[0190] A hot water delivery module 27 for delivering the hot water at the second preset temperature to the water outlet through the water outlet pipe; the temperature difference between the first preset temperature and the second preset temperature is less than a preset temperature threshold.

[0191] In an optional embodiment, the re - response module includes:

[0192] A first ignition unit for, when the user finishes using water and the gas water heater is in a non - combustion state, re - responding to the user's request for hot water and igniting the gas water heater;

[0193] A bypass pipe closing unit for closing the bypass pipe through the flow regulating valve when the gas water heater has not been successfully ignited;

[0194] Correspondingly, the above - mentioned device further includes:

[0195] An execution unit for, when the gas water heater is successfully ignited, performing the operation of controlling the flow regulating valve to open the bypass pipe.

[0196] In an optional embodiment, the delivery and mixing module includes:

[0197] A first flow rate determination unit for obtaining the bypass ratio of the flow regulating valve and determining the first flow rate based on the bypass ratio;

[0198] A first heating energy determination unit for determining the first heating energy of the heating mechanism based on the first flow rate, the inlet temperature of the cold water, and the target temperature;

[0199] A first flow rate cold water delivery unit for delivering cold water with a first flow rate to the heating mechanism through the flow regulating valve;

[0200] The first flow rate cold water heating unit is used to control the heating mechanism to heat the cold water with the first flow rate to the target temperature according to the first heating energy.

[0201] In an optional embodiment, the above device further includes:

[0202] The initial bypass pipe flow rate determination unit is used to obtain the bypass ratio of the flow regulating valve and determine the initial bypass pipe flow rate based on the bypass ratio;

[0203] The energy determination unit is used to determine the first heating energy of the heating mechanism based on the first flow rate, the inlet water temperature of the cold water, and the target temperature;

[0204] The second heating energy determination unit is used to determine the second heating energy based on the first preset temperature, the inlet water temperature, and the total inlet water flow rate of the cold water; the total inlet water flow rate is the sum of the first flow rate and the second flow rate;

[0205] The second flow rate determination unit is used to determine the second flow rate according to the first heating energy and the second heating energy;

[0206] The flow rate adjustment unit is used to adjust the initial bypass flow rate to the second flow rate through the flow regulating valve.

[0207] In an optional embodiment, the first heating energy determination unit includes:

[0208] The first difference determination subunit is used to determine the first difference between the target temperature and the inlet water temperature;

[0209] The first product processing unit is used to determine the product of the first difference and the first flow rate to obtain the first heating energy.

[0210] In an optional embodiment, the second heating energy determination unit includes:

[0211] The second difference determination subunit is used to determine the second difference between the first preset temperature and the inlet water temperature;

[0212] The second product processing unit is used to determine the product of the second difference and the total inlet water flow rate to obtain the second heating energy.

[0213] In an optional embodiment, the second flow rate determination unit includes:

[0214] The equation relationship establishment subunit is used to establish the equation relationship between the first heating energy and the second heating energy;

[0215] An equation relation processing subunit, configured to determine the second flow rate based on the equation relation.

[0216] In an optional embodiment, the above-mentioned device further includes:

[0217] A target temperature judgment unit, configured to determine whether the heating mechanism is maintained at the target temperature;

[0218] A combustion state maintaining unit, configured to, if so, maintain the current combustion state of the heating mechanism;

[0219] A bypass ratio re-determination unit, configured to, if not, adjust the bypass ratio, and re-determine the first flow rate and the second flow rate based on the adjusted bypass ratio until the heating structure is maintained at the target temperature.

[0220] In an optional embodiment, the response module includes:

[0221] A second ignition unit, configured to ignite the gas water heater in response to a user's request for hot water;

[0222] A bypass pipeline opening unit, configured to control the flow regulating valve to open the bypass pipeline when the gas water heater is successfully ignited.

[0223] It should be noted that the embodiment of the control device of a gas water heater provided in the embodiment of the present application and the above-mentioned embodiment of the control method of a gas water heater are based on the same inventive concept.

[0224] The embodiment of the present application further provides an electronic device for controlling a gas water heater. The electronic device includes a processor and a memory. At least one instruction or at least one segment of program is stored in the memory, and at least one instruction or at least one segment of program is loaded and executed by the processor to implement a control method of a gas water heater provided in any of the above embodiments.

[0225] The embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium can be set in a terminal to store at least one instruction or at least one segment of program for implementing the control of a gas water heater in the method embodiment. At least one instruction or at least one segment of program is loaded and executed by the processor to implement a control method of a gas water heater provided in the above method embodiment.

[0226] Optionally, in the embodiments of this specification, the storage medium may be located in at least one of multiple network servers of a computer network. Optionally, in this embodiment, the above storage medium may include, but is not limited to, various media that can store program codes, such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs.

[0227] The memory in the embodiments of this specification can be used to store software programs and modules. The processor executes various functional application programs and data processing by running the software programs and modules stored in the memory. The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for functions, etc.; the data storage area can store data created according to the use of the device, etc. In addition, the memory may include a high-speed random access memory and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. Correspondingly, the memory may further include a memory controller to provide the processor with access to the memory.

[0228] The embodiments of this application also provide a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the control method of a gas water heater provided in the above method embodiments.

[0229] The method embodiments provided in the embodiments of this application can be executed on a terminal, a computer terminal, a server, or a similar computing device. Taking running on a server as an example, Figure 7 is the hardware structure block diagram of a server for the control method of a gas water heater provided in the embodiments of this application. As Figure 7As shown, the server 300 can vary significantly depending on configuration or performance, and may include one or more central processing units (CPUs) 310 (the central processing unit 310 may include, but is not limited to, processing devices such as a microprocessor MCU or a field programmable gate array FPGA), a memory 330 for storing data, and one or more storage media 320 for storing application programs 323 or data 322 (such as one or more mass storage devices). Among them, the memory 330 and the storage medium 320 can be transient storage or persistent storage. The program stored in the storage medium 320 may include one or more modules, and each module may include a series of instruction operations on the server. Further, the central processing unit 310 may be configured to communicate with the storage medium 320 and execute a series of instruction operations in the storage medium 320 on the server 300. The server 300 may also include one or more power supplies 360, one or more wired or wireless network interfaces 350, one or more input / output interfaces 340, and / or one or more operating systems 321, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, and so on.

[0230] The input / output interface 340 can be used to receive or send data via a network. Specific examples of the above network may include a wireless network provided by the communication provider of the server 300. In one example, the input / output interface 340 includes a network interface controller (NIC), which can be connected to other network devices through a base station and thus communicate with the Internet. In one example, the input / output interface 340 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0231] Those of ordinary skill in the art can understand that Figure 7 the structure shown is only illustrative and does not limit the structure of the above electronic device. For example, the server 300 may also include more or fewer components than Figure 7 shown therein, or have a different configuration from Figure 7 that shown.

[0232] It should be noted that: The above sequence of embodiments of the present application is only for description and does not represent the superiority or inferiority of the embodiments. And the specific embodiments of the present specification have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve the desired result. Additionally, the processes depicted in the figures do not necessarily require the particular order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0233] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the device and server embodiments, since they are basically similar to the method embodiments, the description is relatively simple. For the relevant parts, reference can be made to the partial description of the method embodiments.

[0234] Those of ordinary skill in the art can understand that all or part of the steps to implement the above embodiments can be completed by hardware, or can be completed by a program instructing relevant hardware. The program can be stored in a computer-readable storage medium. The above-mentioned storage medium can be a read-only memory, a disk, an optical disc, etc.

[0235] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A control method for a gas water heater, characterized in that, The gas water heater includes a heating mechanism, a water inlet pipeline, a water outlet pipeline, a bypass pipeline, and a flow regulating valve. The flow regulating valve is respectively communicated with the water inlet pipeline, the heating mechanism, and the bypass pipeline. The water outlet pipeline is respectively communicated with the heating structure and the bypass pipeline. The control method of the gas water heater includes: In response to a user's request for hot water, control the flow regulating valve to open the bypass pipeline; Deliver cold water with a first flow rate through the flow regulating valve to the heating mechanism to be heated to a target temperature, and deliver the hot water at the target temperature through the water outlet pipeline to the water outlet; Deliver cold water with a second flow rate through the flow regulating valve and the bypass pipeline to the water outlet to be mixed with the hot water at the target temperature to obtain hot water at a first preset temperature; When the user finishes using water and the gas water heater is in a non-combustion state, in response to the user's request for hot water again, close the bypass pipeline through the flow regulating valve, and deliver cold water through the flow regulating valve to the heating mechanism to be mixed with the hot water at the target temperature to obtain hot water at a second preset temperature; Deliver the hot water at the second preset temperature through the water outlet pipeline to the water outlet; The temperature difference between the first preset temperature and the second preset temperature is less than a preset temperature threshold.

2. The control method of the gas water heater according to claim 1, characterized in that The step of, when the user finishes using water and the gas water heater is in a non-combustion state, in response to the user's request for hot water again, close the bypass pipeline through the flow regulating valve, includes: When the user finishes using water and the gas water heater is in a non-combustion state, in response to the user's request for hot water again, ignite the gas water heater; When the gas water heater has not been successfully ignited, close the bypass pipeline through the flow regulating valve; The method further includes: When the gas water heater is successfully ignited, perform the operation of controlling the flow regulating valve to open the bypass pipeline.

3. The control method of the gas water heater according to claim 1, wherein The step of delivering cold water with a first flow rate through the flow regulating valve to the heating mechanism to be heated to a target temperature includes: Obtain the bypass ratio of the flow regulating valve, and determine the first flow rate based on the bypass ratio; Determine the first heating energy of the heating mechanism based on the first flow rate, the inlet temperature of the cold water, and the target temperature; Deliver cold water with a first flow rate through the flow regulating valve to the heating mechanism; Control the heating mechanism to heat the cold water with the first flow rate to the target temperature according to the first heating energy.

4. The control method of the gas water heater according to claim 1, wherein Before delivering cold water with a second flow rate through the flow regulating valve and the bypass pipeline to the water outlet to be mixed with the hot water at the target temperature, the method further includes: Obtain the bypass ratio of the flow regulating valve, and determine the initial bypass pipeline flow rate based on the bypass ratio; Determine the first heating energy of the heating mechanism based on the first flow rate, the inlet temperature of the cold water, and the target temperature; Determine the second heating energy based on the first preset temperature, the inlet temperature, and the total inlet flow rate of the cold water; The total inlet flow rate is the sum of the first flow rate and the second flow rate; Determine the second flow rate based on the first heating energy and the second heating energy; Adjust the initial bypass flow rate to the second flow rate through the flow rate regulating valve.

5. The control method of the gas water heater according to claim 3 or 4, characterized in that, The determining of the first heating energy of the heating mechanism based on the first flow rate, the inlet water temperature of the cold water, and the target temperature includes: Determine a first difference between the target temperature and the inlet water temperature; Determine the product of the first difference and the first flow rate to obtain the first heating energy.

6. The control method of the gas water heater according to claim 4, characterized in that, The determining of the second heating energy based on the first preset temperature, the inlet water temperature, and the total inlet flow rate of the cold water includes: Determine a second difference between the first preset temperature and the inlet water temperature; Determine the product of the second difference and the total inlet flow rate to obtain the second heating energy.

7. The control method of the gas water heater according to claim 6, characterized in that, The determining of the second flow rate according to the first heating energy and the second heating energy includes: Establish an equation relationship between the first heating energy and the second heating energy; Determine the second flow rate based on the equation relationship.

8. The control method of the gas water heater according to claim 3, wherein The method further includes: Determine whether the heating mechanism is maintained at the target temperature; If so, maintain the current combustion state of the heating mechanism; If not, adjust the bypass ratio, and re-determine the first flow rate and the second flow rate based on the adjusted bypass ratio until the heating structure is maintained at the target temperature.

9. The control method of the gas water heater according to any one of claims 1 to 8, characterized in that, The controlling of the flow rate regulating valve to open the bypass pipeline in response to a user's request for hot water includes: In response to a user's request for hot water, ignite the gas water heater; When the gas water heater is successfully ignited, control the flow rate regulating valve to open the bypass pipeline.

10. A control device for a gas water heater, characterized in that, A gas water heater includes a heating mechanism, an inlet water pipeline, an outlet water pipeline, a bypass pipeline, and a flow rate regulating valve. The flow rate regulating valve is respectively connected to the inlet water pipeline, the heating mechanism, and the bypass pipeline. The outlet water pipeline is respectively connected to the heating structure and the bypass pipeline. The control device of the gas water heater includes: A response module for controlling the flow rate regulating valve to open the bypass pipeline in response to a user's request for hot water; A conveying and mixing module for conveying cold water with a first flow rate to the heating mechanism through the flow rate regulating valve to be heated to a target temperature, and conveying the hot water at the target temperature to the water outlet through the outlet water pipeline; conveying cold water with a second flow rate to the water outlet through the flow rate regulating valve and the bypass pipeline to be mixed with the hot water at the target temperature to obtain hot water at a first preset temperature; A re-response module for, when the user finishes using water and the gas water heater is in a non-combustion state, re-responding to a user's request for hot water, closing the bypass pipeline through the flow rate regulating valve, and conveying cold water to the heating mechanism through the flow rate regulating valve to be mixed with the hot water at the target temperature to obtain hot water at a second preset temperature; A hot water conveying module for conveying the hot water at the second preset temperature to the water outlet; the temperature difference between the first preset temperature and the second preset temperature is less than a preset temperature threshold.

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