Control method of gas water heater, gas water heater and storage medium

Abstract

The invention discloses a control method of a gas water heater, the gas water heater and a storage medium. The method comprises the steps that the gas water heater is controlled to be shut down; a fan in the gas water heater is controlled to execute post-cleaning operation, and whether a water using signal of the gas water heater exists or not is detected; when the water consumption signal is detected, the fan is controlled to stop executing post-cleaning operation, and the gas water heater is controlled to execute ignition operation; and when the water consumption signal is not detected, the fan is controlled to maintain execution of post-cleaning operation until the operation duration of the post-cleaning operation is longer than the target duration. The invention aims to effectively shorten the restarting time of the gas water heater after the gas water heater is shut down and ensure the use safety of equipment at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and particularly to a control method for a gas water heater, a gas water heater, and a storage medium. Background Art

[0002] A gas water heater generally generates heat through the combustion of fuel. Before ignition, the gas water heater will perform a pre-cleaning operation by running the blower, and after extinguishing the fire, it will perform a short post-cleaning operation to avoid blockage of the exhaust passage and ensure the safe use of the equipment.

[0003] However, regardless of the state, before reigniting, the gas water heater will always perform a pre-cleaning and then ignition after extinguishing the fire. This will cause the gas water heater to take a long time to reignite every time there is a water demand after shutdown. During this process, a large amount of cold water flows through the cooled heat exchanger and then is discharged from the water heater, resulting in a large fluctuation in the outlet water temperature of the gas water heater and affecting the user's water use comfort. Summary of the Invention

[0004] The main purpose of the present invention is to provide a control method for a gas water heater, a gas water heater, and a storage medium, aiming to effectively shorten the restart time after the gas water heater is shut down while ensuring the safe use of the equipment.

[0005] To achieve the above object, the present invention provides a control method for a gas water heater, and the control method for the gas water heater includes the following steps:

[0006] Control the gas water heater to extinguish the fire;

[0007] Control the blower in the gas water heater to perform a post-cleaning operation and detect whether there is a water use signal of the gas water heater;

[0008] When the water use signal is detected, control the blower to stop performing the post-cleaning operation and control the gas water heater to perform an ignition operation;

[0009] When the water use signal is not detected, control the blower to maintain the post-cleaning operation until the operation duration of the post-cleaning operation is greater than the target duration.

[0010] Optionally, the step of controlling the blower in the gas water heater to perform a post-cleaning operation includes:

[0011] Control the blower to run at a first cleaning speed for a first duration;

[0012] Control the blower to run at a second cleaning speed for a second duration;

[0013] Wherein, the sum of the first duration and the second duration is less than or equal to the target duration, and the first cleaning rotation speed is greater than the second cleaning rotation speed.

[0014] Optionally, the first duration is less than the second duration.

[0015] Optionally, before the step of controlling the blower in the gas water heater to perform post-cleaning operation, it further includes:

[0016] Obtain the combustion condition parameters of the gas water heater before flameout;

[0017] Determine the first cleaning rotation speed, the second cleaning rotation speed, the first duration, and the second duration according to the combustion condition parameters.

[0018] Optionally, the step of controlling the gas water heater to perform ignition operation includes:

[0019] Control the blower to run at the ignition rotation speed;

[0020] Detect whether the exhaust passage of the gas water heater is blocked;

[0021] When the exhaust passage is not blocked, control the igniter in the gas water heater to turn on.

[0022] Optionally, the step of detecting whether the exhaust passage of the gas water heater is blocked includes:

[0023] Detect the actual rotation speed of the blower;

[0024] When the actual rotation speed reaches the ignition rotation speed, determine that the exhaust passage is not blocked;

[0025] When the actual rotation speed does not reach the ignition rotation speed, determine that the exhaust passage is blocked.

[0026] Optionally, after the step of controlling the gas water heater to flameout, it further includes:

[0027] When the gas water heater shuts down normally, perform the step of controlling the blower in the gas water heater to perform post-cleaning operation and detect whether there is a water usage signal of the gas water heater;

[0028] When the gas water heater shuts down abnormally, control the blower to run at the post-cleaning rotation speed for a third duration and then turn off, and control the gas water heater to output an alarm message;

[0029] Wherein, the third duration is less than the target duration.

[0030] Optionally, after the step of controlling the gas water heater to perform ignition operation, it further includes:

[0031] Obtain the monitoring data of the detection module in the gas water heater;

[0032] When the monitoring data is outside the normal data range, control the gas water heater to extinguish the fire.

[0033] In addition, to achieve the above object, the present application also proposes a gas water heater, which includes a control device and a blower. The control device is connected to the blower. The control device includes: a memory, a processor, and a control program of the gas water heater stored on the memory and executable on the processor. When the control program of the gas water heater is executed by the processor, the steps of the control method of the gas water heater described in any one of the above are implemented.

[0034] In addition, to achieve the above object, the present application also proposes a storage medium, on which a control program of the gas water heater is stored. When the control program of the gas water heater is executed by a processor, the steps of the control method of the gas water heater described in any one of the above are implemented.

[0035] A control method for a gas water heater proposed by the present invention. After the gas water heater extinguishes the fire, the blower is used for a long-time cleaning operation with a duration greater than the target duration. When the water demand is detected during the cleaning process, the cleaning will stop and ignition will be carried out immediately. This process can omit the pre-cleaning process when the machine needs to ignite, effectively shorten the restart time after the gas water heater is shut down, and ensure the smoothness of the exhaust passage when the device is re-ignited through the exhaust function of the post-cleaning, so as to effectively shorten the restart time after the gas water heater is shut down while ensuring the safety of the device during use. Brief Description of the Drawings

[0036] Figure 1 It is a schematic diagram of the hardware structure involved in the operation of an embodiment of the gas water heater of the present invention;

[0037] Figure 2 It is a schematic flowchart of an embodiment of the control method of the gas water heater of the present invention;

[0038] Figure 3 It is a schematic flowchart of another embodiment of the control method of the gas water heater of the present invention;

[0039] Figure 4 It is a schematic flowchart of yet another embodiment of the control method of the gas water heater of the present invention.

[0040] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed Embodiments

[0041] It should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0042] In the prior art, after the gas water heater shuts off, the water demand is detected only after the post-purge is completed. When there is a water demand and the gas water heater needs to be reignited, the gas water heater will first perform a pre-purge and then ignite. During the pre-purge process, the blower generally rotates at a high speed. When the gas water heater needs to be reignited shortly after shutting off, the pre-purge process will unnecessarily prolong the cooling time of the heat exchanger, resulting in an increase in the amount of cold water discharged from the water heater without heating, and the outlet water temperature of the water heater will drop significantly, causing fluctuations in the outlet water temperature.

[0043] The main solution of the embodiment of the present invention is different from that of the prior art in that: the post-purge time of the gas water heater is extended; the detection of whether there is a water demand no longer waits until after the post-purge is completed, but is monitored in real time during the long post-purge process; the pre-purge process before reigniting is omitted, but ignition is immediately performed when there is a water demand during the post-purge process. The solution of the embodiment of the present invention effectively shortens the cooling time of the heat exchanger and the waiting time required when the user's water demand is met while reducing the risk of blockage through the post-purge, enabling the water heater to quickly ignite in response to the user's demand when the user has a water demand, reducing the discharge of unheated cold water from the water heater, and reducing the temperature fluctuation of the water when the gas water heater reignites after shutting off, thereby effectively shortening the restart time after the gas water heater shuts down while ensuring the safe use of the device.

[0044] An embodiment of the present invention provides a gas water heater.

[0045] In an embodiment of the present invention, referring to Figure 1 , the gas water heater includes a control device 1 and a blower 2. The blower 2 is connected to the control device 1, and the control device 1 can be used to control the opening, closing, and operating speed of the blower 2.

[0046] In this embodiment, the gas water heater includes a housing and a heat exchanger, a combustion device 3, and a blower disposed inside the housing. The heat exchanger is connected with a water inlet pipe and a water outlet pipe. The combustion device 3 is used to provide heat for the heat exchanger during operation. The combustion device 3 includes an igniter, and the igniter is disposed in the combustion chamber of the burner. The blower 2 is used to supply air to the burner. The housing is provided with an air outlet for discharging the gas inside the housing to the outside.

[0047] In this embodiment, a water flow switch is provided in the water circuit connected to the heat exchanger, and the water flow switch can output different signals according to different water flow states in the water circuit.

[0048] In an embodiment of the present invention, referring to Figure 1, the control device 1 of the gas water heater includes: a processor 1001, such as a CPU, a memory 1002, and a timer 1003. Among them, these components are connected and communicate with each other through a communication bus. The memory 1002 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0049] Those skilled in the art can understand that Figure 1 the device structure shown in

[0050] does not constitute a limitation on the device, and may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements. Figure 1 As shown in

[0051] In Figure 1 the device shown, the processor 1001 can be used to call the control program of the gas water heater stored in the memory 1002 and execute the relevant step operations of the control method of the gas water heater in the following embodiments.

[0052] An embodiment of the present invention also provides a control method for a gas water heater, which is applied to the above-mentioned gas water heater.

[0053] Referring to Figure 2 , an embodiment of the control method of the gas water heater of the present application is proposed. In this embodiment, the control method of the gas water heater includes:

[0054] Step S10, controlling the gas water heater to extinguish the fire;

[0055] When the gas water heater extinguishes the fire, the burner stops working and the heat exchanger stops taking in water.

[0056] During the combustion process of the gas water heater, it is possible to detect whether there is a water use signal in real time or at intervals of a set duration. When a water use signal is detected, the gas water heater is controlled to maintain the combustion state, and when no water use signal is detected, the gas water heater is controlled to extinguish the fire.

[0057] Specifically, a water flow switch can be set in the water path where the heat exchanger is located. When there is water flow in the water path, the water flow switch has a signal, and when there is no water flow in the water path, the water flow switch has no signal. Based on this, the water use signal here includes the signal of the water flow switch.

[0058] Step S20, controlling the blower in the gas water heater to perform a post-purge operation and detecting whether there is a water use signal of the gas water heater;

[0059] The post-purge operation specifically refers to the operation in which, after the gas water heater is extinguished, the blower runs to purge the remaining heat and gas inside the gas water heater.

[0060] In one implementation, the post-purge operation includes the blower maintaining a running state at a fixed speed to purge the gas water heater. In another implementation, the post-purge operation includes the blower running at different speeds for a certain period of time successively to purge the gas water heater. In this embodiment, the blower runs at different speeds in different time periods successively, with one speed corresponding to each time period. As the extinguishing duration represented by the time period increases, the speed shows a downward trend.

[0061] During the process of the blower performing the post-purge operation, it is detected in real time or at set intervals whether there is a water usage signal until the post-purge operation ends. The presence of a water usage signal indicates that the blower has a water usage demand and needs to be ignited; the absence of a water usage signal indicates that the blower does not have a water usage demand and does not need to be ignited.

[0062] Detecting whether there is a water usage signal for the gas water heater may specifically include: detecting whether there is a signal from the water flow switch. If there is a signal from the water flow switch, there is a water usage signal; if there is no signal from the water flow switch, there is no water usage signal.

[0063] Step S30, when the water usage signal is detected, control the blower to stop performing the post-purge operation, and control the gas water heater to perform an ignition operation;

[0064] Here, stopping the post-purge operation specifically includes the blower stopping running at the current post-purge speed.

[0065] Immediately after the post-purge operation stops, control the gas water heater to perform an ignition operation. Then, the blower switches from the current post-purge speed to the ignition speed, and the igniter in the combustion device is turned on.

[0066] Step S40, when the water usage signal is not detected, control the blower to continue performing the post-purge operation until the operation duration of the post-purge operation is greater than the target duration.

[0067] The target duration can be a preset fixed duration, or a duration determined according to the actual operating conditions of the gas water heater and / or the environmental state of the environment where the gas water heater is located. In this embodiment, the target duration is greater than or equal to 180 s.

[0068] A control method for a gas water heater proposed in an embodiment of the present invention. After the gas water heater is extinguished, the blower is used for a long-time post-cleaning operation with an operation duration longer than the target duration. When a water usage demand is detected during the post-cleaning process, the post-cleaning will be stopped and ignition will be performed immediately. This process can omit the pre-cleaning process when the machine needs to be ignited, effectively shorten the restart duration after the gas water heater is shut down, and ensure the smoothness of the exhaust passage when the device is reignited through the exhaust function of the post-cleaning, thereby effectively shortening the restart duration after the gas water heater is shut down while ensuring the safe use of the device.

[0069] Further, based on the above embodiment, another embodiment of the control method for the gas water heater of the present application is proposed. In this embodiment, referring to Figure 3 , the steps of controlling the blower in the gas water heater to perform the post-cleaning operation include:

[0070] Step S21, controlling the blower to operate at a first cleaning speed for a first duration;

[0071] Step S22, controlling the blower to operate at a second cleaning speed for a second duration;

[0072] Wherein, the sum of the first duration and the second duration is less than or equal to the target duration, and the first cleaning speed is greater than the second cleaning speed.

[0073] The first cleaning speed and the second cleaning speed can be preset fixed speeds, or can be speeds determined according to the actual operating conditions of the gas water heater.

[0074] The first duration and the second duration can be preset fixed durations, or can be durations determined according to the actual operating conditions of the gas water heater.

[0075] During the execution of step S21, it is detected whether there is a water usage signal of the gas water heater. When a water usage signal is detected, the blower stops operating at the first cleaning speed, step S22 is no longer executed, and the gas water heater is controlled to perform the ignition operation; when no water usage signal is detected, the blower continues to operate at the first cleaning speed until the duration of the blower operating at the first cleaning speed reaches the first duration, and then step S22 is executed.

[0076] During the execution of step S22, it is detected whether there is a water usage signal of the gas water heater. When a water usage signal is detected, the blower stops operating at the second cleaning speed, subsequent post-cleaning steps are prohibited, and the gas water heater is controlled to perform the ignition operation; when no water usage signal is detected, the blower continues to operate at the second cleaning speed until the duration of the blower operating at the second cleaning speed reaches the second duration, and then other post-cleaning processes are continued until the operation duration is longer than the target duration, or it can be considered that the operation duration is already longer than the target duration and the post-cleaning operation is stopped.

[0077] In this embodiment, if the sum of the first duration and the second duration is the target duration, the post-cleaning operation is completed after both step S21 and step S22 are completed; if the sum of the first duration and the second duration is less than the target duration, other post-cleaning processes can be continued after both step S21 and step S22 are completed until the operation duration is greater than the target duration.

[0078] In this embodiment, during the post-cleaning process, the blower first operates at a high speed for a period of time and then operates at a low speed. The high-speed operation process can quickly remove the heat inside the water heater and the possible gas components, and the low-speed operation can continue to exhaust gas while reducing noise, so as to effectively balance the cleaning effect and the noise reduction effect.

[0079] In other embodiments, the step of controlling the blower in the gas water heater to perform the post-cleaning operation may also include controlling the blower to maintain the first cleaning speed until the operation duration is greater than the target duration, or controlling the blower to maintain the second cleaning speed until the operation duration is greater than the target duration, or controlling the blower to operate at the first cleaning speed for the first duration, then controlling the blower to operate at the second cleaning speed for the second duration, and then controlling the blower to operate at the third cleaning speed for the third duration, where the sum of the first duration, the second duration, and the third duration is less than or equal to the target duration, or controlling the blower to alternately operate at the first cleaning speed and the second cleaning speed at different time intervals.

[0080] Further, in this embodiment, the first duration is less than the second duration, which is beneficial to fully exhaust the tail gas in the gas water heater while reducing the noise during the cleaning process and delaying the cooling of the heat exchanger, thereby ensuring the use safety of the water heater, shortening the time required for re-ignition, and further reducing the temperature fluctuation.

[0081] In other embodiments, the first duration may also be equal to or greater than the second duration.

[0082] Further, in this embodiment, before the step of controlling the blower in the gas water heater to perform the post-cleaning operation, it further includes: obtaining the combustion condition parameters of the gas water heater before extinguishing; determining the first cleaning speed, the second cleaning speed, the first duration, and the second duration according to the combustion condition parameters.

[0083] The combustion condition parameters may specifically include at least one of the following: combustion power, combustion duration, air-fuel ratio corresponding to different moments during the combustion stage, temperature of the heat exchanger at the time of extinguishing, and so on.

[0084] Specifically, the remaining heat at the time of the gas water heater's flameout and the amount of gas remaining in the gas water heater can be determined based on the combustion condition parameters. The first cleaning rotation speed and the first duration are determined based on the remaining heat and the remaining gas amount. The second duration is determined based on the target duration and the first duration. The predicted temperature of the heat exchanger when the operation duration of the post-cleaning operation reaches the first duration is determined based on the temperature of the heat exchanger at the time of flameout, the first duration, and the first cleaning rotation speed. The second cleaning rotation speed is determined based on the predicted temperature and the second duration.

[0085] In this embodiment, through the above method, the accuracy of the control parameters during the post-cleaning process can be improved, so that the post-cleaning process can ensure the safety of the equipment when it is reignited while reducing the fluctuation of the water outlet temperature of the water heater.

[0086] Further, based on any of the above embodiments, another embodiment of the control method of the gas water heater of the present application is proposed. In this embodiment, referring to Figure 4 , the steps of controlling the gas water heater to perform the ignition operation include:

[0087] Step S31, controlling the blower to operate at the ignition rotation speed;

[0088] The ignition rotation speed here can be a preset fixed rotation speed or a rotation speed determined according to the current actual operating conditions of the gas water heater. In this embodiment, a corresponding rotation speed range is preset for the ignition rotation speed, and the ignition rotation speed here can be determined within the rotation speed range according to the flameout duration of the gas water heater. The flameout duration here is specifically the interval duration between the current moment and the last flameout moment of the gas water heater.

[0089] Step S32, detecting whether the exhaust passage of the gas water heater is blocked;

[0090] Here, it can be determined whether the exhaust passage is blocked by the deviation between the input parameters and the output parameters of the components related to exhaust in the gas water heater; it can also be determined whether the exhaust passage is blocked according to the data detected by the air pressure detection module provided in the gas water heater.

[0091] Step S33, when the exhaust passage is not blocked, controlling the igniter in the gas water heater to turn on.

[0092] In addition, when the exhaust passage is blocked, control the blower to stop and control the gas water heater to output a prompt message.

[0093] In this embodiment, during the ignition process, the blower first switches from the original post-cleaning rotation speed to the ignition rotation speed to operate, and then detects the ventilation condition of the exhaust passage during the operation of the blower at the ignition rotation speed. The igniter is only turned on when it is determined that there is no blockage, which is beneficial to ensuring that the air pressure in the gas water heater is not too high at the moment of ignition, so as to achieve rapid re-ignition while further ensuring the use safety of the equipment.

[0094] Further, in this embodiment, the step of detecting whether the exhaust passage of the gas water heater is blocked includes: detecting the actual rotation speed of the blower; when the actual rotation speed reaches the ignition rotation speed, determining that the exhaust passage is not blocked; when the actual rotation speed does not reach the ignition rotation speed, determining that the exhaust passage is blocked.

[0095] The actual rotation speed of the blower can be detected by detecting the output current, output power, etc. of the blower, or can also be detected by a Hall sensor arranged on the output shaft of the corresponding blower.

[0096] Here, reaching the ignition rotation speed specifically means that the rotation speed deviation between the actual rotation speed and the ignition rotation speed is less than a preset deviation. When the rotation speed deviation between the actual rotation speed and the ignition rotation speed is less than the preset deviation, it can be determined that the exhaust passage is not blocked; when the rotation speed deviation between the actual rotation speed and the ignition rotation speed is greater than or equal to the preset deviation, it can be determined that the exhaust passage is blocked.

[0097] In this embodiment, by detecting whether the actual rotation speed of the blower reaches the ignition rotation speed to detect whether the exhaust passage is blocked, compared with the method of setting a detection module in the air duct, it can shorten the response time required for the blocked state to be reflected in the detection data, which is beneficial to improving the efficiency of blockage determination, thereby further improving the time required for reigniting after flameout while ensuring the safe use of the device.

[0098] Further, based on any of the above embodiments, another embodiment of the control method of the gas water heater of the present application is proposed. In this embodiment, after the step of controlling the gas water heater to flame out, it further includes: when the gas water heater shuts down normally, controlling the blower in the gas water heater to perform a post - cleaning operation and detecting whether there is a water - using signal of the gas water heater; when the gas water heater shuts down abnormally, controlling the blower to run at a post - cleaning rotation speed for a third duration and then shut down, and controlling the gas water heater to output an alarm message; where the third duration is less than the target duration.

[0099] Normal flameout can specifically be to shut down in response to an instruction indicating that the user has no water - using demand. Abnormal flameout can specifically be to shut down for the purpose of protecting the device due to abnormal device operation when the instruction to stop the user's water use is not detected.

[0100] The post - cleaning rotation speed here is greater than or equal to the above - mentioned first cleaning rotation speed, and the third duration is less than or equal to the above - mentioned first duration.

[0101] The third duration and the post - cleaning rotation speed can be preset fixed parameters, or can also be parameters determined according to the actual operation situation of the water heater. For example, the post - cleaning rotation speed and the third duration here can be determined according to the abnormal data monitored when the gas water heater shuts down.

[0102] In this embodiment, when the gas water heater shuts down normally, a method of performing a long post-cleaning and monitoring the water demand during the cleaning process is adopted to shorten the time required for re-ignition. When the gas water heater shuts down abnormally, a short post-cleaning is performed followed by an alarm, which is beneficial to protecting the safety of equipment use while enabling users to promptly know the fault situation of the gas water heater through the alarm information and take corresponding measures.

[0103] Further, based on any of the above embodiments, after the step of controlling the gas water heater to perform the ignition operation, the method further includes: obtaining the monitoring data of the detection module in the gas water heater; when the monitoring data is outside the normal data range, controlling the gas water heater to shut down.

[0104] Here, the shutdown of the gas water heater can be considered as the above-mentioned abnormal shutdown. At this time, the blower can be controlled to run at the post-cleaning speed for a third duration and then shut down, and the gas water heater can be controlled to output an alarm message.

[0105] Among them, when the monitoring data is within the normal data range, the gas water heater can be controlled to operate normally.

[0106] In this embodiment, after shutdown, the operating state of the gas water heater is monitored during re-ignition, and when an abnormality is detected, the shutdown is performed, which is beneficial to further quickly re-igniting while improving the safety of equipment use during the re-ignition process.

[0107] Further, based on any of the above embodiments, in this embodiment, after the step of controlling the blower to maintain the post-cleaning operation until the operation duration of the post-cleaning operation is greater than the target duration, the method further includes: controlling the blower to shut down, controlling the gas water heater to enter the standby state; when the water use signal is detected in the standby state, controlling the blower to perform the pre-cleaning operation; when the pre-cleaning operation is completed, controlling the gas water heater to ignite.

[0108] In this embodiment, if there is no need for re-ignition after a long post-cleaning after the gas water heater shuts down, then after entering the standby state, when there is a water use demand, the pre-cleaning is restored before ignition, which is beneficial to avoiding situations such as air duct blockage during the long shutdown process and improving the ignition safety.

[0109] In addition, an embodiment of the present invention further provides a storage medium, on which a control program for a gas water heater is stored. When the control program for the gas water heater is executed by a processor, the relevant steps of any of the above embodiments of the control method for the gas water heater are implemented.

[0110] It should be noted that in this document, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or system comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or system comprising that element.

[0111] The serial numbers of the above embodiments of the present invention are for description only and do not represent the superiority or inferiority of the embodiments.

[0112] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium as described above (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to enable a terminal device (which can be a mobile phone, computer, server, gas water heater, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0113] The above are only the preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A control method for a gas water heater, characterized in that The control method of the gas water heater includes the following steps: Control the gas water heater to extinguish the fire; Control the blower in the gas water heater to perform a post-purge operation and detect whether there is a water usage signal of the gas water heater; When the water usage signal is detected, control the blower to stop performing the post-purge operation, and control the gas water heater to perform an ignition operation; When the water usage signal is not detected, control the blower to maintain the post-purge operation until the operation duration of the post-purge operation is greater than the target duration.

2. The control method of the gas water heater according to claim 1, characterized in that The step of controlling the blower in the gas water heater to perform the post-purge operation includes: Control the blower to run at a first purge speed for a first duration; Control the blower to run at a second purge speed for a second duration; Wherein, the sum of the first duration and the second duration is less than or equal to the target duration, and the first purge speed is greater than the second purge speed.

3. The control method of the gas water heater according to claim 2, wherein, The first duration is less than the second duration.

4. The control method of the gas water heater according to claim 2, wherein, Before the step of controlling the blower in the gas water heater to perform the post-purge operation, it further includes: Obtain the combustion condition parameters before the gas water heater extinguishes the fire; Determine the first purge speed, the second purge speed, the first duration, and the second duration according to the combustion condition parameters.

5. The control method of the gas water heater according to claim 1, characterized in that The step of controlling the gas water heater to perform the ignition operation includes: Control the blower to run at an ignition speed; Detect whether the exhaust passage of the gas water heater is blocked; When the exhaust passage is not blocked, control the igniter in the gas water heater to turn on.

6. The control method of the gas water heater according to claim 5, characterized in that, The step of detecting whether the exhaust passage of the gas water heater is blocked includes: Detect the actual speed of the blower; When the actual speed reaches the ignition speed, determine that the exhaust passage is not blocked; When the actual speed does not reach the ignition speed, determine that the exhaust passage is blocked.

7. The control method of a gas water heater according to any one of claims 1 to 6, characterized in that, After the step of controlling the gas water heater to extinguish the fire, it further includes: When the gas water heater extinguishes the fire normally, perform the step of controlling the blower in the gas water heater to perform the post-purge operation and detect whether there is a water usage signal of the gas water heater; When the gas water heater extinguishes the fire abnormally, control the blower to run at a post-purge speed for a third duration and then turn off, and control the gas water heater to output an alarm message; Wherein, the third duration is less than the target duration.

8. The control method of the gas water heater according to any one of claims 1 to 6, characterized in that, After the step of controlling the gas water heater to perform the ignition operation, it further includes: Obtain the monitoring data of the detection module in the gas water heater; When the monitoring data is outside the normal data range, control the gas water heater to extinguish the fire.

9. A gas water heater, characterized in that, The gas water heater includes a control device and a blower, the control device is connected to the blower, and the control device includes: a memory, a processor, and a control program of the gas water heater stored on the memory and executable on the processor. When the control program of the gas water heater is executed by the processor, it realizes the steps of the control method of the gas water heater according to any one of claims 1 to 8.

10. A storage medium, characterized in that, A control program of a gas water heater is stored on the storage medium. When the control program of the gas water heater is executed by a processor, the steps of the control method of the gas water heater according to any one of claims 1 to 8 are implemented.

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