Gas water heater and control method and device thereof, storage medium

Abstract

The present invention relates to the technical field of water heaters, and specifically discloses a gas water heater and a control method and device thereof, and a storage medium, wherein the water heater comprises a fan and a gas furnace, the fan is used to provide air to the gas furnace, and to discharge exhaust gas generated by the gas furnace, and the control method comprises: after the gas furnace is normally started, obtaining load information of the water heater; determining a target wind speed of the fan according to the load information; controlling the operation of the fan according to the target wind speed to reduce the operating noise of the water heater; obtaining feedback wind speed and feedback current of the fan; when the feedback wind speed and feedback current meet preset conditions, controlling the gas furnace to stop working and controlling the fan to perform post-cleaning, thereby improving the service life of the water heater and the user experience.

Description

Technical Field

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

[0002] Water heaters are a very widely used household appliance. There are many types of water heaters, such as electric water heaters, gas water heaters, etc.

[0003] For gas water heaters, the load will change during operation. If the fan does not follow up in time, the cavity pressure of the water heater may change, which will cause combustion resonance, motor blockage and other problems, causing the water heater to produce loud noise during operation, and seriously affecting the service life of the water heater. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the first object of the present invention is to provide a control method for a gas water heater, which can control a gas furnace and a fan according to the operating state of the fan to reduce the operating noise of the water heater and improve the service life of the water heater and the user's experience.

[0005] A second object of the present invention is to provide a computer-readable storage medium.

[0006] The third object of the present invention is to provide a control device for a gas water heater.

[0007] A fourth object of the present invention is to provide a gas water heater.

[0008] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention proposes a control method for a gas water heater, wherein the water heater includes a fan and a gas furnace, the fan is used to provide air to the gas furnace, and to discharge the exhaust gas generated by the gas furnace, and the method includes: after the gas furnace is started normally, obtaining the load information of the water heater; determining the target wind speed of the fan according to the load information; controlling the operation of the fan according to the target wind speed; obtaining the feedback wind speed and feedback current of the fan; when the feedback wind speed and the feedback current meet preset conditions, controlling the gas furnace to stop working and controlling the fan to perform post-cleaning.

[0009] In the control method of the gas water heater in the embodiment of the present invention, it is first necessary to determine whether the gas furnace is started normally. After the gas furnace is started normally, the load information of the water heater is obtained, and then the target wind speed of the fan is determined according to the obtained load information. The fan operation is controlled according to the target wind speed, and the wind speed and current fed back by the fan are obtained. The gas furnace and the fan are controlled according to the feedback wind speed and feedback current to reduce the operating noise of the water heater, while improving the service life of the water heater and the user experience.

[0010] In some embodiments of the present invention, the method also includes: when it is determined that the wind speed of the fan is in a stable state based on the feedback wind speed, if the wind speed of the fan is greater than a preset wind speed of a first preset multiple, and the current of the fan is less than a preset blocking current, then it is determined that the feedback wind speed and the feedback current meet the preset conditions.

[0011] In some embodiments of the present invention, the method also includes: if the wind speed of the fan is less than or equal to the preset wind speed of a first preset multiple and greater than the preset wind speed of a second preset multiple, then updating the preset wind speed and reacquiring the load information of the water heater; if the wind speed of the fan is less than or equal to the preset wind speed of the first preset multiple and less than or equal to the preset wind speed of the second preset multiple, then maintaining the preset wind speed and reacquiring the load information of the water heater.

[0012] In some embodiments of the present invention, the method further includes: when it is determined according to the feedback wind speed that the wind speed of the fan is not in the stable state, reacquiring the load information of the water heater.

[0013] In some embodiments of the present invention, the method also includes: if the wind speed of the fan is determined to be greater than a preset wind speed of a first preset multiple according to the feedback wind speed, and the current of the fan is determined to be greater than or equal to a preset blocking current according to the feedback current, then the wind speed of the fan is further judged; when the wind speed of the fan is greater than the preset blocking wind speed, then it is determined that the feedback wind speed and the feedback current meet the preset conditions; when the wind speed of the fan is less than or equal to the preset blocking wind speed, then the load information of the water heater is reacquired, wherein the preset blocking wind speed is greater than the preset wind speed of the first preset multiple.

[0014] In some embodiments of the present invention, the method also includes: obtaining the water inlet flow of the water heater; when the water inlet flow reaches the starting flow of the gas furnace, controlling the fan to start; obtaining wind speed information and current information of the fan; when the wind speed information is within a preset wind speed range or the current information is within a preset current range, controlling the gas furnace to start; obtaining a flame signal of the gas furnace; and when the flame signal remains valid for a preset period of time, determining that the gas furnace has started normally.

[0015] In some embodiments of the present invention, the method further includes: when the flame signal does not remain valid for the preset time period, determining that the gas furnace has failed to start, and counting the number of startup failures of the gas furnace; when the number of startup failures reaches a preset number, determining that the water heater has a fault; when the number of startup failures does not reach the preset number, re-obtaining the water inlet flow of the water heater.

[0016] In some embodiments of the present invention, the method further includes: when the wind speed information is not within a preset wind speed range and the current information is not within a preset current range, determining that the water heater fails.

[0017] In some embodiments of the present invention, controlling the fan to start includes: controlling the fan to perform pre-cleaning; and after completing the pre-cleaning, controlling the fan according to the target wind speed.

[0018] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium on which a control program for a gas water heater is stored. When the control program is executed by a processor, the control method for the gas water heater described in any one of the above embodiments is implemented.

[0019] The computer-readable storage medium of the embodiment of the present invention can reduce the operating noise of the water heater and improve the service life of the water heater and the user's experience by executing the control program of the gas water heater stored thereon through a processor.

[0020] To achieve the above-mentioned purpose, the third aspect of the embodiment of the present invention proposes a control device for a gas water heater, wherein the water heater includes a fan and a gas furnace, wherein the fan is used to provide air to the gas furnace and discharge exhaust gas generated by the gas furnace, and the device includes: a first acquisition module, used to obtain the load information of the water heater after the gas furnace is started normally; a determination module, used to determine the target wind speed of the fan according to the load information; a control module, used to control the operation of the fan according to the target wind speed; a second acquisition module, used to obtain the feedback wind speed and feedback current of the fan; the control module is also used to control the gas furnace to stop working and control the fan to perform post-cleaning when the feedback wind speed and the feedback current meet preset conditions.

[0021] In the control method of the gas water heater in the embodiment of the present invention, it is first necessary to determine whether the gas furnace is started normally. After the gas furnace is started normally, the first acquisition module is used to obtain the load information of the water heater. Then the determination module can determine the target wind speed of the fan according to the acquired load information. The control module controls the operation of the fan according to the target wind speed, and uses the second acquisition module to obtain the wind speed and current fed back by the fan. The control module controls the gas furnace and the fan according to the feedback wind speed and feedback current to reduce the operating noise of the water heater, while improving the service life of the water heater and the user experience.

[0022] To achieve the above-mentioned purpose, the fourth aspect of the present invention proposes a gas water heater, which includes a fan, a gas furnace and a control device of the gas water heater described in the above embodiment, and the control device is respectively connected to the fan and the gas furnace for controlling the fan and the gas furnace.

[0023] The gas water heater of the embodiment of the present invention controls the fan and the gas furnace through the control device of the gas water heater of the above embodiment, which can reduce the operating noise of the water heater and improve the service life of the water heater and the user's experience.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flow chart of a control method for a gas water heater in one embodiment of the present invention;

[0026] Figure 2 is a flow chart of a control method for a gas water heater in another embodiment of the present invention;

[0027] Figure 3 is a flow chart of a control method for a gas water heater in another embodiment of the present invention;

[0028] Figure 4 is a flow chart of a control method for a gas water heater in another embodiment of the present invention;

[0029] Figure 5 is a flow chart of a control method for a gas water heater in a specific embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of the internal structure of a gas water heater in one embodiment of the present invention;

[0031] Figure 7 is a block diagram of a control device for a gas water heater according to an embodiment of the present invention;

[0032] Figure 8 1 is a structural block diagram of a gas water heater in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] The following describes a gas water heater and a control method and device thereof, and a storage medium according to an embodiment of the present invention with reference to the accompanying drawings.

[0035] The gas water heater of the present invention can be specifically selected as a balanced gas water heater, which specifically utilizes the fan in the water heater to provide outdoor air to the gas furnace, and discharges the exhaust gas generated by the combustion of the gas furnace to the outside, thereby not consuming indoor oxygen, not causing indoor hypoxia, etc., and has a high safety factor.

[0036] Figure 1 It is a flow chart of a control method of a gas water heater in one embodiment of the present invention.

[0037] like Figure 1 As shown, the present invention proposes a control method for a gas water heater, the control method comprising the following steps:

[0038] S10, after the gas furnace is started normally, the load information of the water heater is obtained.

[0039] Specifically, this embodiment needs to first determine whether the gas furnace in the water heater is started normally. After determining that the gas furnace can be started normally, the water heater needs to be controlled. If the gas furnace cannot be started normally, it can be explained that the current water flow is small, or the user needs to start the gas furnace, etc., and the control method of the gas water heater can be not executed at this time. In the control method of the gas water heater that needs to be executed, the load information of the water heater is first obtained. The load of the water heater often represents the user's hot water demand. During the operation of the water heater, the user's hot water demand needs to be used as the control target to meet the user's demand for hot water and improve the user's experience. After determining the load information of the water heater, the subsequent control steps are performed according to the load information. More specifically, the load information in this embodiment can be calculated based on the water inlet temperature, water inlet flow rate and temperature set by the user of the water heater. It can be calculated in real time or the calculation model can be set in advance. The water inlet temperature, water inlet flow rate and setting are input into the calculation model, and the corresponding load information can be directly output. The specific acquisition method can be determined according to the actual application scenario and the computing power of the chip in the water heater, and is not specifically limited here.

[0040] S20, determining a target wind speed of the wind turbine according to the load information.

[0041] S30, controlling the operation of the fan according to the target wind speed.

[0042] Specifically, after the load information is obtained, the corresponding target wind speed of the blower can be determined according to the load information. It should be noted that different load information can correspond to different target wind speeds, the purpose of which is to ensure the normal operation of the water heater and reduce the operating noise of the water heater. Optionally, the correspondence between the load information and the target wind speed can also be pre-stored in the water heater through a calculation model, or can be directly calculated through relevant calculation parameters, which is not specifically limited here. It can be understood that there is a positive proportional relationship between the target wind speed and the load information, that is, at the same segment opening, the greater the load, the greater the target wind speed.

[0043] After the target wind speed of the fan is determined, the fan can be controlled according to the target wind speed. Specifically, the target wind speed can be converted into a current signal, and then the operation of the fan is controlled according to the current signal so that the fan can run at the target wind speed.

[0044] In addition, it should be noted that the present embodiment can also determine whether the sectional valve in the water heater is activated according to the target wind speed. If it is activated, the sectional valve is ignited and then normally burned. If it is not activated, it is directly burned. It can be understood that the sectional valve can adjust the supply of gas. For example, in summer, the sectional valve can only operate part of it. If it is in winter, the sectional valve can be fully opened to avoid unnecessary energy waste. Optionally, the sectional valve also has a safety guarantee mechanism, which can automatically cut off the gas when encountering abnormal conditions to prevent safety accidents.

[0045] S40, obtaining the feedback wind speed and feedback current of the wind turbine.

[0046] Specifically, although the wind turbine operates with the target wind speed as the target, due to reasons such as structure and current instability, the wind speed of the wind turbine is not necessarily the target wind speed. It may be greater than the target wind speed or less than the target wind speed. This embodiment also obtains the feedback wind speed and feedback current of the wind turbine so as to subsequently adjust the operating state of the wind turbine according to the feedback wind speed and feedback current.

[0047] S50, when the feedback wind speed and the feedback current meet the preset conditions, the gas furnace is controlled to stop working and the fan is controlled to perform post-cleaning.

[0048] Specifically, after obtaining the feedback wind speed and feedback current of the fan, it can be determined whether the feedback wind speed and feedback current meet the preset conditions. If so, it means that the current motor may be blocked. Therefore, for safety reasons, it is necessary to control the gas furnace to stop working and control the fan to perform post-cleaning, that is, to clean the heat and exhaust gas generated by the gas furnace after the gas furnace stops working.

[0049] It should be noted that, in this embodiment, there are multiple situations where the feedback wind speed and the feedback current meet the preset conditions, which will be described in detail in the subsequent embodiments.

[0050] In some embodiments of the present invention, when the wind speed of the fan is determined to be in a stable state based on the feedback wind speed, if the wind speed of the fan is greater than a preset wind speed of a first preset multiple, and the current of the fan is less than a preset blocking current, it is determined that the feedback wind speed and the feedback current meet the preset conditions.

[0051] Specifically, the stable state of the feedback wind speed can be judged first. Specifically, whether the fan is in a stable state can be judged according to the rate of change of the feedback wind speed. For example, when the feedback wind speed is stable at ± the first preset wind speed threshold for a preset time threshold, it is determined that it is in a stable state. For example, when the feedback wind speed is stable at ± 80 rpm for 1 second, it can be determined that the wind speed of the fan is in a stable state. In some embodiments, if it is determined that the wind speed of the fan is not in a stable state according to the feedback wind speed, the load information of the water heater is re-acquired to re-execute the control method of the gas water heater.

[0052] After the wind speed of the fan is in a stable state, the wind speed and current of the fan are further determined. Specifically, the wind speed of the fan can be compared with the preset wind speed. If the wind speed of the fan is greater than the preset wind speed of the first preset multiple, and the current of the fan is less than the preset blocking current, then it can be determined that the feedback wind speed and the feedback current meet the preset conditions of the above embodiment. It should be noted that the preset wind speed and the preset blocking current can be set in advance, and are not specifically limited here. More specifically, the preset wind speed of the first preset multiple can also be understood as the first preset percentage point exceeding the preset wind speed. For example, the first preset percentage point can be 20%. It should be noted that 20% is only exemplary. In other embodiments, it can also be 15%, 25%, etc., which is determined based on the analysis of the actual application scenario.

[0053] In this embodiment, if the wind speed of the fan is less than or equal to the preset wind speed of the first preset multiple and greater than the preset wind speed of the second preset multiple, the preset wind speed is updated and the load information of the water heater is reacquired; if the wind speed of the fan is less than or equal to the preset wind speed of the first preset multiple and less than or equal to the preset wind speed of the second preset multiple, the preset wind speed is maintained and the load information of the water heater is reacquired.

[0054] Specifically, after the wind speed of the fan is in a stable state, in the process of further determining the wind speed of the fan, if the wind speed of the fan is less than or equal to the preset wind speed of the first preset multiple, it is further determined whether it is greater than the preset wind speed of the second preset multiple. If it is determined that the wind speed of the fan is greater than the preset wind speed of the second preset multiple, it is necessary to update the preset wind speed, and then re-acquire the load information of the water heater, and re-execute the control method of the gas water heater according to the re-acquired load information. If it is determined that the wind speed of the fan is less than or equal to the preset wind speed of the second preset multiple, the current preset wind speed is maintained, and the load information of the water heater is also re-acquired to re-execute the control method of the gas water heater. More specifically, the preset wind speed of the second preset multiple can also be understood as the second preset percentage point exceeding the preset wind speed. For example, the second preset percentage point can be 3%. It should be noted that 3% is only exemplary. In other embodiments, it can also be 2%, 5%, etc., which are analyzed and determined according to the actual application scenario. In addition, for example, updating the preset wind speed can specifically calculate the sum of the current preset wind speed and the product of the second preset percentage point multiplied by the second preset wind speed threshold, and then use the sum as the new preset wind speed. Optionally, the second preset wind speed threshold can be 60 rpm.

[0055] In other embodiments of the present invention, Figure 2 As shown, the control method also includes:

[0056] S201, if the wind speed of the fan is greater than the preset wind speed of the first preset multiple according to the feedback wind speed, and the current of the fan is greater than or equal to the preset blocking current according to the feedback current, the wind speed of the fan is further judged.

[0057] S202: When the wind speed of the fan is greater than a preset blocking wind speed, it is determined that the feedback wind speed and the feedback current meet preset conditions.

[0058] S203, when the wind speed of the fan is less than or equal to the preset blocking wind speed, reacquire the load information of the water heater, wherein the preset blocking wind speed is greater than a preset wind speed of a first preset multiple.

[0059] Specifically, after the wind speed of the fan is in a stable state, in the process of further judging the size of the wind speed of the fan, the wind speed of the fan can be specifically compared with the preset wind speed. If the wind speed of the fan is greater than the preset wind speed of the first preset multiple, and the current of the fan is greater than or equal to the preset blocking current, the wind speed of the fan can be further judged. Specifically, the wind speed of the fan is compared with the preset blocking wind speed. If the wind speed of the fan is greater than the preset blocking wind speed, it can also be determined that the feedback wind speed and the feedback current meet the preset conditions to control the fan and the gas furnace. If the wind speed of the fan is less than or equal to the preset blocking wind speed, the load information of the water heater is re-acquired to re-execute the control method of the gas water heater in the above embodiment. It should be noted that in this embodiment, the preset blocking wind speed is greater than the preset wind speed of the first preset multiple. Optionally, the preset blocking wind speed is the sum of the maximum speed in the standard working condition of the fan set before the water heater leaves the factory multiplied by the preset coefficient and the third preset wind speed threshold. Figure 2 The FH in the figure represents the maximum speed of the fan in the standard operating condition set before the water heater leaves the factory. In this embodiment, the preset coefficient may be 60%, and the third preset wind speed threshold may be 1500 rpm.

[0060] In some embodiments of the present invention, Figure 3 As shown, the control method also includes:

[0061] S301, obtaining the water inlet flow rate of the water heater.

[0062] S302, when the water inlet flow reaches the starting flow of the gas furnace, the fan is controlled to start.

[0063] S303, obtaining wind speed information and current information of the wind turbine.

[0064] S304, when the wind speed information is within a preset wind speed range or the current information is within a preset current range, controlling the gas furnace to start.

[0065] S305, obtaining a flame signal of the gas furnace.

[0066] S306: When the flame signal remains valid for a preset time period, it is determined that the gas furnace is started normally.

[0067] Specifically, this embodiment specifically describes whether the gas furnace is started normally. Since whether the gas furnace is started is related to the water flow rate of the water heater, when the water flow rate is small, in order to ensure the safety of the water heater, the gas furnace may not be started, and the gas furnace is started when the water heater reaches the starting flow rate. It should be noted that in order to ensure the normal operation of the water heater, this embodiment controls the fan to start after the water flow rate reaches the starting flow rate, and starts the gas furnace when the wind speed and current of the fan meet the required range, so that the fan can provide sufficient air to the gas furnace, and can also ensure that the waste gas and heat generated by the subsequent gas furnace work are discharged in time.

[0068] In this embodiment, the water inlet flow rate of the water heater can be obtained through a flow sensor. Specifically, multiple flow sensors can be set and multiple flow sensors can be set for calibration to improve the accuracy of flow acquisition. The wind speed information and current information of the fan can also be detected through a wind speed sensor and a current sensor. This embodiment does not limit the specific detection method of the water inlet flow rate, wind speed information and current information.

[0069] After obtaining the wind speed information and current information, a judgment is made based on the wind speed and current. If the wind speed of the fan is within the preset wind speed range or the current of the fan is within the preset current range, it means that the current gas furnace can be started, and then the gas furnace is started by controlling the igniter of the gas furnace to discharge. Then the flame signal of the gas furnace is obtained. If the flame signal of the gas furnace can continue for a preset time, it can be determined that the gas furnace has been started normally. Optionally, the preset time in this embodiment can be 5 seconds.

[0070] In this embodiment, if the wind speed information is not within the preset wind speed range and the current information is not within the preset current range, it can be determined that the water heater has a fault. Because under normal circumstances, the wind speed and current of the fan are within the range. If they are not within the range, it means that the current water heater has a fault, and the specific determination of the fault can be made by the inspection personnel later. Optionally, the preset wind speed range is not more than the sum of the preset wind speed and the fourth preset wind speed threshold, and the preset current range is greater than or equal to the preset blocking current. In some examples, the fourth preset wind speed threshold can be 500 rpm.

[0071] It should be noted that, in this embodiment, after controlling the igniter to discharge and start the gas furnace, it is also necessary to control the main valve, proportional valve and other valves of the gas furnace to open so as to deliver gas to the burner for combustion.

[0072] In this embodiment, if Figure 4 As shown, the control method also includes:

[0073] S401, when the flame signal does not remain valid for a preset time period, it is determined that the gas furnace fails to start, and the number of failed start-ups of the gas furnace is counted.

[0074] S402: When the number of startup failures reaches a preset number, it is determined that the water heater is faulty.

[0075] S403, when the number of startup failures does not reach the preset number, re-obtain the water inlet flow of the water heater.

[0076] Specifically, when detecting the flame of the gas stove, if the flame signal fails to remain valid for a preset time, such as the flame goes out one second after ignition, it means that the gas stove fails to start. In order to improve the detection accuracy, the present embodiment continues to detect and counts the number of failed startups of the gas stove. If the number of failed startups of the gas stove reaches the preset number, it can be determined that the water heater has a fault, which may be due to a blockage in the gas pipe of the gas stove or other faults, which can be confirmed by maintenance personnel. If the number of failed startups has not reached the preset number, it can be restarted, that is, it returns to the step of obtaining the water inlet flow of the water heater to avoid the situation where the water heater cannot be used normally due to misjudgment. Optionally, the preset number of times in the present embodiment can be 3 times, of course, it can also be 2 times, 4 times, 5 times, etc., which are not specifically limited.

[0077] In this embodiment, controlling the fan to start includes: controlling the fan to perform pre-cleaning; and after the pre-cleaning is completed, controlling the fan according to the target wind speed.

[0078] Specifically, during the process of starting and controlling the fan, this embodiment first controls the fan to perform pre-cleaning to determine whether the wind pressure is normal. If the exhaust and air inlet channels are blocked, an alarm is issued and the operation is stopped. If the pre-cleaning is completed successfully, the fan can be further controlled according to the target wind speed.

[0079] In a specific embodiment of the present invention, Figure 5 and Figure 6As shown, the present invention first detects the water inlet flow of the water heater. If the water inlet flow does not reach the starting flow of the gas furnace 14, the process returns to the standby step to correct the water inlet flow. If the water inlet flow reaches the starting flow of the gas furnace 14, the fan 15 is controlled to perform a pre-sweep to confirm whether the wind pressure is normal. When the wind pressure is normal, the fan 15 is controlled to operate according to the target wind speed. Then, the wind speed information and current information of the fan 15 are obtained. When the wind speed of the fan 15 does not exceed the preset wind speed and the fourth wind speed, the fan 15 is controlled to operate according to the target wind speed. If the sum of the preset wind speed thresholds or the current of the fan 15 is greater than or equal to the preset blocking current, the igniter of the gas furnace 14 is controlled to discharge, and then the main valve 11, the sectional valve 12, and the proportional valve 13 of the gas furnace 14 are opened, and then it is determined whether the flame of the gas furnace 14 continues for 5 seconds. If so, it is determined that the gas furnace 14 is started normally. Otherwise, it is determined whether the ignition fails 3 times. If so, it is determined that the water heater has a fault. If the ignition failure has not accumulated to 3 times, it returns to the standby step to perform functions detection and other operations on the igniter. After the gas furnace 14 is started normally, the load information of the water heater is obtained, and then the target wind speed of the fan 15 is determined according to the load information. When the wind speed of the fan 15 is stable, if the wind speed of the fan 15 is greater than the preset wind speed of the first preset multiple, and the current of the fan 15 is less than the preset blocking current, it is determined that the water heater is blocked, and the valve on the gas furnace 14 is closed, and then post-cleaning is performed; if the wind speed of the fan 15 is greater than the preset wind speed of the first preset multiple, and the current of the fan 15 is greater than or equal to the preset blocking current, then when it is further determined that the wind speed of the fan 15 is greater than the preset blocking wind speed, it is also determined that the water heater is blocked, and the valve on the gas furnace 14 is closed, and then post-cleaning is performed. If the wind speed of the fan 15 is not greater than the preset blocking wind speed, the load information of the water heater is obtained again. When the wind speed of the fan 15 is stable, if the wind speed of the fan 15 is not greater than the preset wind speed of the first preset multiple but greater than the preset wind speed of the second preset multiple, the preset wind speed is updated and then the load information of the water heater is reacquired; if the wind speed of the fan 15 is not greater than the preset wind speed of the first preset multiple and not greater than the preset wind speed of the second preset multiple, the load information of the water heater is directly reacquired.

[0080] In the above embodiments, after determining that the water heater has a fault, the corresponding fault code or other fault indication information can be displayed to facilitate viewing by users and maintenance personnel.

[0081] In summary, the control method of the gas water heater in the embodiment of the present invention can control the gas furnace and the fan according to the operating state of the fan to reduce the operating noise of the water heater, while improving the service life of the water heater and the user's experience.

[0082] Furthermore, the present invention also proposes a computer-readable storage medium on which a control program of a gas water heater is stored. When the control program is executed by a processor, any of the gas water heater control methods in the above embodiments is implemented.

[0083] The computer-readable storage medium of the embodiment of the present invention executes the control program of the gas water heater stored thereon through a processor, and can control the gas furnace and the fan according to the operating status of the fan to reduce the operating noise of the water heater, while improving the service life of the water heater and the user's experience.

[0084] Figure 7 It is a block diagram of a control device for a gas water heater in an embodiment of the present invention.

[0085] Furthermore, if Figure 7 As shown, the present invention proposes a control device 100 for a gas water heater, wherein the water heater includes a fan and a gas furnace, the fan is used to provide air to the gas furnace and discharge exhaust gas generated by the gas furnace, and the control device 100 includes a first acquisition module 101, a determination module 102, a control module 103 and a second acquisition module 104.

[0086] Among them, the first acquisition module 101 is used to obtain the load information of the water heater after the gas furnace is started normally; the determination module 102 is used to determine the target wind speed of the fan according to the load information; the control module 103 is used to control the operation of the fan according to the target wind speed; the second acquisition module 104 is used to obtain the feedback wind speed and feedback current of the fan; the control module 103 is also used to control the gas furnace to stop working and control the fan to perform post-cleaning when the feedback wind speed and feedback current meet the preset conditions.

[0087] In some embodiments of the present invention, the determination module 102 is also used to: when it is determined that the wind speed of the wind turbine is in a stable state based on the feedback wind speed, if the wind speed of the wind turbine is greater than a preset wind speed of a first preset multiple, and the current of the wind turbine is less than a preset blocking current, then determine that the feedback wind speed and the feedback current meet the preset conditions.

[0088] In some embodiments of the present invention, the control module 103 is also used to: if the wind speed of the fan is less than or equal to the preset wind speed of a first preset multiple and greater than the preset wind speed of a second preset multiple, then update the preset wind speed and re-acquire the load information of the water heater; if the wind speed of the fan is less than or equal to the preset wind speed of the first preset multiple and less than or equal to the preset wind speed of the second preset multiple, then maintain the preset wind speed and re-acquire the load information of the water heater.

[0089] In some embodiments of the present invention, the first acquisition module 101 is further used to: when it is determined according to the feedback wind speed that the wind speed of the fan is not in a stable state, re-acquire the load information of the water heater.

[0090] In some embodiments of the present invention, the determination module 102 is also used for: if the wind speed of the fan is determined to be greater than a preset wind speed of a first preset multiple according to the feedback wind speed, and the current of the fan is determined to be greater than or equal to a preset blocking current according to the feedback current, then the wind speed of the fan is further judged; when the wind speed of the fan is greater than the preset blocking wind speed, it is determined that the feedback wind speed and the feedback current meet the preset conditions; when the wind speed of the fan is less than or equal to the preset blocking wind speed, the load information of the water heater is re-acquired, wherein the preset blocking wind speed is greater than the preset wind speed of a first preset multiple.

[0091] In some embodiments of the present invention, the second acquisition module 104 is also used to: obtain the water inlet flow of the water heater; the control module 103 is also used to: control the fan to start when the water inlet flow reaches the starting flow of the gas furnace; the second acquisition module 104 is also used to: obtain the wind speed information and current information of the fan; the control module 103 is also used to: control the gas furnace to start when the wind speed information is within a preset wind speed range or the current information is within a preset current range; the second acquisition module 104 is also used to: obtain the flame signal of the gas furnace; the determination module 102 is also used to: determine that the gas furnace is started normally when the flame signal remains valid for a preset period of time.

[0092] In some embodiments of the present invention, the control module 103 is also used to: when the flame signal does not remain valid for a preset time period, determine that the gas furnace has failed to start, and count the number of startup failures of the gas furnace; when the number of startup failures reaches a preset number, determine that the water heater has a fault; when the number of startup failures does not reach the preset number, re-obtain the water inlet flow of the water heater.

[0093] In some embodiments of the present invention, the determination module 102 is further configured to: determine that the water heater fails when the wind speed information is not within a preset wind speed range and the current information is not within a preset current range.

[0094] In some embodiments of the present invention, the control module 103 is further used to: control the fan to perform pre-cleaning; and after the pre-cleaning is completed, control the fan according to the target wind speed.

[0095] It should be noted that the specific implementation of the control device of the gas water heater in the embodiment of the present invention can refer to the specific implementation of the control method of the gas water heater in the above embodiment, and will not be described again here to avoid redundancy.

[0096] In summary, the control device of the gas water heater in the embodiment of the present invention can control the gas furnace and the fan according to the operating status of the fan to reduce the operating noise of the water heater, while improving the service life of the water heater and the user's experience.

[0097] Figure 81 is a structural block diagram of a gas water heater in an embodiment of the present invention.

[0098] Furthermore, if Figure 8 As shown, the present invention proposes a gas water heater 200, which includes a fan 15, a gas furnace 14 and a control device 100 of the gas water heater in the above embodiment, and the control device 100 is respectively connected to the fan 15 and the gas furnace 14 for controlling the fan 15 and the gas furnace 14.

[0099] The gas water heater of the embodiment of the present invention controls the fan and the gas furnace through the control device of the gas water heater of the above embodiment, which can reduce the operating noise of the water heater and improve the service life of the water heater and the user's experience.

[0100] In addition, other structures and functions of the gas water heater in the embodiment of the present invention are known to those skilled in the art and will not be described in detail here to reduce redundancy.

[0101] It should be noted that the logic and / or steps represented in the flowchart or described in other ways herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0102] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0103] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0104] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0105] In addition, the terms "first", "second", etc. used in the embodiments of the present invention are only used for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in the present embodiment. Therefore, the features defined by the terms "first", "second", etc. in the embodiments of the present invention can explicitly or implicitly indicate that the embodiment includes at least one of the features. In the description of the present invention, the word "multiple" means at least two or two or more, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments.

[0106] In the present invention, unless otherwise clearly specified or limited in the embodiments, the terms "installed", "connected", "connected" and "fixed" etc. in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific implementation situation.

[0107] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0108] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A control method for a gas water heater, characterized in that: The water heater comprises a fan and a gas furnace, wherein the fan is used to supply air to the gas furnace and discharge exhaust gas generated by the gas furnace, and the method comprises: After the gas furnace is started normally, obtaining load information of the water heater; Determining a target wind speed of the wind turbine according to the load information; Controlling the operation of the fan according to the target wind speed; Obtaining feedback wind speed and feedback current of the wind turbine; When the feedback wind speed and the feedback current meet the preset conditions, the gas furnace is controlled to stop working and the fan is controlled to perform post-cleaning; If it is determined according to the feedback wind speed that the wind speed of the fan is greater than a preset wind speed of a first preset multiple, and it is determined according to the feedback current that the current of the fan is greater than or equal to a preset blocking current, the wind speed of the fan is further judged; When the wind speed of the fan is greater than the preset blocking wind speed, it is determined that the feedback wind speed and the feedback current meet the preset condition; When the wind speed of the fan is less than or equal to the preset blocking wind speed, the load information of the water heater is reacquired, wherein the preset blocking wind speed is greater than the preset wind speed of the first preset multiple.

2. The control method according to claim 1, characterized in that: The method further comprises: When it is determined that the wind speed of the fan is in a stable state based on the feedback wind speed, if the wind speed of the fan is greater than a preset wind speed of a first preset multiple, and the current of the fan is less than a preset blocking current, it is determined that the feedback wind speed and the feedback current meet the preset conditions.

3. The control method according to claim 2, characterized in that: The method further comprises: If the wind speed of the fan is less than or equal to the preset wind speed of the first preset multiple and greater than the preset wind speed of the second preset multiple, the preset wind speed is updated and the load information of the water heater is reacquired; If the wind speed of the fan is less than or equal to the first preset multiple of the preset wind speed and less than or equal to the second preset multiple of the preset wind speed, the preset wind speed is maintained and the load information of the water heater is reacquired.

4. The control method according to claim 2, characterized in that: The method further comprises: When it is determined according to the feedback wind speed that the wind speed of the fan is not in the stable state, the load information of the water heater is reacquired.

5. The control method according to any one of claims 1 to 4, characterized in that: The method further comprises: Obtaining the water inlet flow rate of the water heater; When the water inlet flow rate reaches the starting flow rate of the gas furnace, controlling the fan to start; Obtaining wind speed information and current information of the wind turbine; When the wind speed information is within a preset wind speed range or the current information is within a preset current range, controlling the gas furnace to start; Obtaining a flame signal of the gas furnace; When the flame signal remains valid for a preset time period, it is determined that the gas furnace is started normally.

6. The control method according to claim 5, characterized in that: The method further comprises: When the flame signal does not remain valid for the preset time period, it is determined that the gas furnace fails to start, and the number of startup failures of the gas furnace is counted; When the number of startup failures reaches a preset number, determining that the water heater has a fault; When the number of startup failures does not reach a preset number, the water inlet flow of the water heater is re-obtained.

7. The control method according to claim 5, characterized in that: The method further comprises: When the wind speed information is not within a preset wind speed range and the current information is not within a preset current range, it is determined that the water heater fails.

8. The control method according to claim 5, characterized in that: Controlling the fan to start, comprising: Controlling the fan to perform front cleaning; After the pre-cleaning is completed, the fan is controlled according to the target wind speed.

9. A computer-readable storage medium, characterized in that: A control program of the gas water heater is stored thereon, and when the control program is executed by the processor, the control method of the gas water heater described in any one of claims 1 to 8 is implemented.

10. A control device for a gas water heater, characterized in that: The water heater comprises a fan and a gas furnace, wherein the fan is used to supply air to the gas furnace and discharge exhaust gas generated by the gas furnace, and the device comprises: A first acquisition module, used for acquiring the load information of the water heater after the gas furnace is normally started; A determination module, configured to determine a target wind speed of the wind turbine according to the load information; A control module, used for controlling the operation of the fan according to the target wind speed; A second acquisition module is used to obtain the feedback wind speed and feedback current of the wind turbine; The control module is further used to control the gas furnace to stop working and control the fan to perform post-cleaning when the feedback wind speed and the feedback current meet preset conditions; The determination module is also used to further judge the wind speed of the fan if it is determined based on the feedback wind speed that the wind speed of the fan is greater than a preset wind speed of a first preset multiple, and if it is determined based on the feedback current that the current of the fan is greater than or equal to a preset blocking current; when the wind speed of the fan is greater than the preset blocking wind speed, it is determined that the feedback wind speed and the feedback current meet the preset conditions; when the wind speed of the fan is less than or equal to the preset blocking wind speed, the load information of the water heater is reacquired, wherein the preset blocking wind speed is greater than the preset wind speed of the first preset multiple.

11. A gas water heater, characterized in that: It comprises a fan, a gas furnace and a control device of the gas water heater according to claim 10, wherein the control device is respectively connected to the fan and the gas furnace and is used for controlling the fan and the gas furnace.

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