Control method and controller of gas water heater and gas water heater

Abstract

The present invention relates to the technical field of hot water supply equipment, and discloses a control method, a controller and a gas water heater. In response to entering a regulation mode, the present invention obtains a small-end current and a pre-locking current difference; based on the small-end current and the pre-locking current difference, the current locking current is determined to update the locking current; in response to exiting the regulation mode, the gas water heater is controlled to work based on the current locking current. The current small-end current and the pre-locking current difference are obtained, and the current locking current is determined based on the small-end current and the pre-locking current difference. When the small-end current changes due to pressure drift in the proportional valve, the locking current can be updated so that the proportional current can be smoothly adjusted to the small-end current, effectively avoiding the situation where the small-end current is less than the locking current and the small-end pressure of the gas water heater is out of adjustment, thereby improving the reliability of the gas water heater.

Description

Technical Field

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

[0002] In order to prevent the gas water heater from stalling when working at a low load due to the low pressure at the small end, a locking current is usually set below the small end current corresponding to the minimum working load of the gas water heater. The locking current is used to lock the minimum value of the small end current to control the minimum working pressure. Since the secondary pressure of the proportional valve has a certain tolerance, and the secondary pressure of the proportional valve may drift after long-term use, if the difference between the set pressure (gas pressure) of the gas water heater and the locking pressure is less than the tolerance band of the proportional valve, the set small end current is less than the locking current, and the current of the proportional valve cannot be adjusted to the set small end current, resulting in the gas water heater having an imbalance of small end pressure, and there is a risk of failure of the automatic thermostat, which leads to low reliability of the gas water heater. Summary of the invention

[0003] The first technical problem solved by the present invention is to provide a control method for a gas water heater, which can improve the problem of pressure imbalance at the small end of the gas water heater and improve the reliability of the gas water heater.

[0004] The second technical problem solved by the present invention is to provide a controller which can improve the problem of pressure imbalance at the small end of the gas water heater and improve the reliability of the gas water heater.

[0005] The third technical problem solved by the present invention is to provide a gas water heater, which can improve the problem of pressure imbalance at the small end of the gas water heater and improve the reliability of the gas water heater.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A control method for a gas water heater, comprising:

[0008] In response to entering the regulation mode, obtaining the small-end current and the pre-lock current difference;

[0009] Determine the current locking current based on the difference between the small-end current and the pre-locking current to update the locking current;

[0010] In response to exiting the regulation mode, the gas water heater is controlled to operate based on the current lock current.

[0011] Compared with the background technology, the control method of the gas water heater of the present invention has the following beneficial effects: the current small-end current and the pre-locking current difference are obtained, and the current locking current is determined based on the small-end current and the pre-locking current difference. When the small-end current changes due to pressure drift in the proportional valve, the locking current can be updated so that the proportional current can be smoothly adjusted to the small-end current, effectively avoiding the situation where the small-end current is less than the locking current and the small-end pressure of the gas water heater is out of adjustment, thereby improving the reliability of the gas water heater.

[0012] In one embodiment, obtaining the pre-locking current difference includes:

[0013] Obtain the pre-locking pressure difference and the pressure variation coefficient corresponding to the proportional current;

[0014] Based on the pre-lock pressure difference and the pressure variation coefficient, a pre-lock current difference is determined.

[0015] In one embodiment, the pressure variation coefficient is determined as follows:

[0016] Obtain current change information and corresponding pressure change information of the proportional valve; the current change information is used to characterize the change of the proportional current within a preset time, and the pressure change information is used to characterize the change of the secondary pressure of the proportional valve within a preset time;

[0017] Based on the current change information and the pressure change information, the corresponding relationship between the proportional current and the secondary pressure of the proportional valve is calculated to obtain the pressure change coefficient.

[0018] In one embodiment, the method for determining the pressure variation coefficient further includes:

[0019] Based on the model information of the gas water heater, the pressure variation coefficient is obtained by looking up the table.

[0020] In one embodiment, obtaining the pre-locking current difference includes:

[0021] Based on the model information of the gas water heater, the pre-locking current difference is obtained by looking up the table.

[0022] In one embodiment, the small-end current is obtained by adjusting the proportional current based on the small-end thermal efficiency value;

[0023] The proportional current is adjusted based on the small-end thermal efficiency value, including:

[0024] Adjust the proportional current to adjust the current thermal efficiency value to the small end thermal efficiency value;

[0025] The proportional current corresponding to the small-end thermal efficiency value is determined as the small-end current.

[0026] In one embodiment, the method further comprises:

[0027] The large-end thermal efficiency value is obtained, and the proportional current is adjusted based on the large-end thermal efficiency value to obtain the large-end current.

[0028] In one embodiment, the proportional current is adjusted based on the large-end thermal efficiency value to obtain the large-end current, including:

[0029] Adjust the proportional current to adjust the current proportional valve secondary pressure to the large end thermal efficiency value;

[0030] The proportional current corresponding to the large-end thermal efficiency value is determined as the large-end current.

[0031] The above second technical problem is solved by the following technical solution:

[0032] A controller includes a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes any of the above-mentioned control methods for gas water heaters by executing the computer instructions.

[0033] The third technical problem mentioned above is solved by the following technical solution:

[0034] A gas water heater comprises a controller, wherein the controller is used to execute any of the above-mentioned control methods for the gas water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 is a flow chart of a control method for a gas water heater according to an embodiment of the present invention;

[0037] Figure 2 It is a schematic diagram of a flow chart of obtaining a pre-locking current difference in a control method of a gas water heater according to an embodiment of the present invention;

[0038] Figure 3 It is a schematic flow chart of determining a pressure variation coefficient in a control method of a gas water heater according to an embodiment of the present invention;

[0039] Figure 4 Schematic diagram of the hardware structure of the controller according to the embodiment of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0042] As described in the background technology, if the difference between the set pressure and the locking pressure of the gas water heater is less than the tolerance band of the proportional valve, the set small-end current is less than the locking current, and the current of the proportional valve cannot be adjusted to the set small-end current. On the one hand, during the production process of the gas water heater, the set small-end current is less than the locking current, which will result in the inability to adjust the pressure to the pressure value corresponding to the set small-end current, that is, the minimum pressure value, resulting in small-end pressure imbalance; on the other hand, during the use of the gas water heater, when the set small-end current is close to or equal to the locking current, the gas water heater will have air pressure fluctuations and water pressure fluctuations when working at a low load, resulting in the inability of the proportional valve current to adjust downward, thereby causing the automatic thermostat to fail. The existence of the above problems leads to low reliability of the gas water heater and the risk of flameout under low-pressure working conditions.

[0043] In addition, the proportional valve will experience pressure drift after long-term use, leading to problems such as increased temperature rise. Since the current gas water heater will forcibly lock the current, the proportional valve cannot be repaired by gear adjustment and other methods. The only option is to replace the proportional valve or refresh the control board program. As a result, the reliability of the gas water heater is greatly reduced after long-term use, and it is difficult and costly to repair.

[0044] Based on this, the present invention provides a control method for a gas water heater, which, in response to entering a regulation mode, obtains a small-end current and a pre-locking current difference; determines a current locking current based on the small-end current and the pre-locking current difference to update the locking current; and controls the operation of the gas water heater based on the current locking current in response to exiting the regulation mode. The current small-end current and the pre-locking current difference are obtained, and the current locking current is determined based on the small-end current and the pre-locking current difference. When the proportional valve has pressure drift and the small-end current changes, the locking current can be updated so that the proportional current can be smoothly adjusted to the small-end current, effectively avoiding the situation where the small-end current is less than the locking current and the small-end pressure of the gas water heater is out of adjustment, thereby improving the reliability of the gas water heater.

[0045] It should be noted that, in the embodiment of the present invention, the "small end" is used to characterize that the gas water heater operates at the minimum working pressure (minimum working load), that is, the number of fire discharges of the gas water heater is the smallest or the set minimum value; the "big end" is used to characterize that the gas water heater operates at the maximum working pressure (maximum working load), that is, the number of fire discharges of the gas water heater is the largest or the set maximum value. Using the "small end" to define a parameter indicates that the parameter value is the value of the parameter at the minimum working pressure; using the "big end" to define a parameter indicates that the parameter value is the value of the parameter at the maximum working pressure. For example, the small end current is the current value of the proportional current at the minimum working pressure.

[0046] Combine the following Figures 1 to 4 , describing an embodiment of the present invention.

[0047] According to an embodiment of the present invention, on the one hand, a control method for a gas water heater is provided. Figure 1 FIG. 1 is a flow chart of a control method for a gas water heater according to an embodiment of the present invention. Figure 1 As shown, the method includes:

[0048] Step 110 : In response to entering the regulation mode, obtaining the small-end current and the pre-locking current difference.

[0049] In the embodiment of the present invention, the regulation mode is a mode for adjusting the proportional current of the gas water heater, and the proportional current is the current of the proportional valve of the gas water heater. During the production process and use of the gas water heater, the small end current can be adjusted and the locking current can be updated by entering the regulation mode.

[0050] In an embodiment of the present invention, the pre-locking current difference is used to limit the gap between the small-end current and the locking current, so that there is a fixed current difference between the small-end current and the locking current, ensuring that the locking current is always smaller than the small-end current, thereby ensuring that the proportional current can be adjusted to the small-end current, thereby avoiding flameout when the gas water heater is working at a small load.

[0051] In the embodiment of the present invention, during the production process of the gas water heater, since the proportional valve has a certain tolerance, the small-end current of the proportional valve needs to be adjusted. During the adjustment process, a logical relationship of the locking current is added. While achieving the matching of the proportional valve with the secondary combustion pressure of the gas water heater, the locking current is used to lock the proportional current to avoid flameout when the gas water heater is working at a small load.

[0052] In the embodiment of the present invention, during the use of the gas water heater, due to the long-term use of the proportional valve, the pressure drift will become larger, etc., resulting in the originally adjusted small-end current no longer matching the combustion secondary pressure under the ideal working state of the gas water heater, affecting the working efficiency of the gas water heater. At this time, it is necessary to readjust the small-end current of the proportional valve and update the locking current at the same time, so that the locking current changes with the small-end current, and ensure that the locking current is less than the small-end current, so that the proportional current can be adjusted to the small-end current, thereby avoiding flameout when the gas water heater is working at a small load.

[0053] In one embodiment, the adjustment mode can be entered by triggering a button corresponding to the adjustment mode, so that the user can adjust the small-end current at any time according to needs, and update the locking current based on the adjusted small-end current.

[0054] In one embodiment, in order to avoid a large pressure drift of the proportional valve after long-term use, resulting in the adjusted small-end current matching the combustion secondary pressure under the ideal working state, and the small-end current being less than the locking current or close to the locking current, the adjustment mode can be automatically triggered at regular intervals, the small-end current can be automatically adjusted, and the locking current can be updated based on the adjusted small-end current; the pressure drift of the proportional valve can also be detected at regular intervals, and the combustion secondary pressure under the ideal working state of the gas water heater can be compared with the secondary pressure corresponding to the small-end current of the proportional valve. If the difference between the two exceeds a preset threshold, the adjustment mode is automatically triggered, the small-end current is automatically adjusted, and the locking current is updated based on the adjusted small-end current.

[0055] Step 120: Determine the current locking current based on the difference between the small-end current and the pre-locking current to update the locking current.

[0056] In the embodiment of the present invention, the locking current is used to limit the minimum value of the proportional current when the gas water heater is working. Based on the difference between the small-end current and the pre-locking current difference, the current locking current is determined, and the current locking current is the updated locking current; wherein the small-end current is obtained by resetting, that is, after the small-end current is set, the locking current is updated according to the set small-end current.

[0057] In the embodiment of the present invention, the current locking current is determined based on the difference between the small-end current and the pre-locking current, which can be shown in the following formula (1):

[0058] I0=I1-△I formula (1)

[0059] Among them, I3 is the locking current, I1 is the small end current, and △I is the pre-locking current difference.

[0060] Step 130: In response to exiting the regulation mode, controlling the gas water heater to operate based on the current locking current.

[0061] In an embodiment of the present invention, in response to exiting the adjustment mode, the gas water heater is controlled to enter the working mode. At this time, the gas water heater operates according to the adjusted small-end current and the current locking current. When the proportional current is adjusted, the minimum value of the proportional current is limited by the current locking current to avoid the gas water heater from stalling when working under small load.

[0062] In an embodiment of the present invention, when the proportional current is adjusted based on the current locking current control, if the adjustment value of the proportional current is greater than the current value corresponding to the current locking current, the proportional current can be adjusted according to the adjustment value; if the adjustment value of the proportional current is less than or equal to the current value corresponding to the current locking current, since the locking of the proportional current by the current locking current is triggered at this time, the proportional current is adjusted according to the current value corresponding to the current locking current.

[0063] In one embodiment, the adjustment mode can be exited by triggering a button corresponding to the adjustment mode exit, so that the user can quickly exit the adjustment mode after completing the setting of the small-end current and the updating of the locking current.

[0064] In one embodiment, the two operations of entering the adjustment mode and exiting the adjustment mode can share one button, and different operations can be triggered by different triggering methods. For example, the adjustment mode can be entered by long pressing the button, and the adjustment mode can be exited by multiple clicks of the button.

[0065] In one embodiment, the adjustment mode can also be automatically exited after the small-end current is set and the locking current is updated. When it is detected that the small-end current and the locking current in the system are updated, the adjustment mode is automatically exited, so that on the one hand, the adjustment mode can be automatically exited when the adjustment mode is automatically triggered to ensure the reliability of the gas water heater, and on the other hand, the operation of updating the small-end current and the locking current is simplified to improve the convenience and speed of the operation.

[0066] In one embodiment, in the above step 110, the value of the pre-locking current difference is related to the model of the gas water heater; in order to quickly update the locking current, the pre-locking current difference of gas water heaters of different models can be set in advance to form a correspondence between the model and the pre-locking current difference, which can be stored in the form of a table. When obtaining the pre-locking current difference, the pre-locking current difference can be obtained by looking up the table based on the model information of the gas water heater.

[0067] In one embodiment, in the above step 110, it is further considered that the working and use conditions of the same model of gas water heaters may be different, resulting in certain differences between their states. Therefore, in order to improve the accuracy of the pre-locking current difference and make it fully fit the use state of the gas water heater, the value of the pre-locking current difference is not only related to the model of the gas water heater, but also to the secondary combustion pressure of the gas water heater; at this time, the pressure and current related information of the gas water heater can be obtained in real time to determine the pre-locking current difference. Specifically, Figure 2 FIG. 1 is a flow chart of obtaining a pre-locking current difference in a control method for a gas water heater according to an embodiment of the present invention. Figure 2 As shown, in the above step 110, obtaining the pre-locking current difference may include:

[0068] Step 210: Obtain the pre-locking pressure difference and the pressure variation coefficient corresponding to the proportional current.

[0069] In the embodiment of the present invention, the pre-locking pressure difference is related to the specific design of the gas water heater, which is the difference between the small end pressure and the combustion safety pressure. The small end pressure is the secondary gas pressure of the gas water heater at the minimum working pressure, and the combustion safety pressure is the minimum secondary gas pressure of the gas water heater. When the pressure is lower than this pressure, the gas water heater will be flameout. Therefore, it is necessary to lock the secondary gas pressure of the gas water heater at the combustion safety pressure, that is, to lock the proportional current at the locking current.

[0070] In an embodiment of the present invention, in order to facilitate the calculation of the pre-locking current difference, and taking into account that the pressure drift of the proportional valve becomes larger after long-term use, the small-end pressure and the combustion safety pressure will change, and it is difficult to calculate the pre-locking pressure difference based on the small-end pressure and the combustion safety pressure. Therefore, the pre-locking pressure difference can be pre-set according to the model of the gas water heater. When determining the pre-locking current difference, a table can be looked up according to the model information of the gas water heater to obtain the pre-locking pressure difference, or the pre-locking pressure difference can be directly written into the memory of the system or controller and directly called when in use.

[0071] In the embodiment of the present invention, the pressure variation coefficient corresponding to the proportional current is related to the specific design of the gas water heater, such as the selected proportional valve, nozzle design, and the like.

[0072] Step 220: Determine a pre-locking current difference based on the pre-locking pressure difference and the pressure variation coefficient.

[0073] In the embodiment of the present invention, the pre-locking pressure difference is divided by the pressure variation coefficient to obtain the pre-locking current difference, which can be specifically shown in the following formula (2):

[0074]

[0075] Among them, △I is the pre-locking current difference, P is the pre-locking pressure difference, and P0 is the pressure change coefficient.

[0076] In one embodiment, in order to ensure the reliability of updating the locking current, in actual applications, a table lookup can be performed based on the model information of the gas water heater. If the pre-locking current difference corresponding to the model information of the gas water heater can be found, the pre-locking current difference found will be used as the pre-locking current difference currently used; if the pre-locking current difference corresponding to the model information of the gas water heater cannot be found, the pre-locking current difference can be calculated according to the method shown in steps 210 to 220 above.

[0077] In one embodiment, in the above step 210, the pressure variation coefficient is related to the model of the gas water heater; in order to quickly update the locking current, the pressure variation coefficients of gas water heaters of different models can be set in advance to form a corresponding relationship between the model and the pressure variation coefficient, which can be stored in the form of a table. When obtaining the pressure variation coefficient, the pressure variation coefficient can be obtained by looking up the table based on the model information of the gas water heater.

[0078] In one embodiment, in the above step 210, it is further considered that there will be certain differences between proportional valves of the same model of gas water heaters, and there will be differences in their working and use conditions, resulting in certain differences between their states. Therefore, in order to improve the accuracy of the pressure variation coefficient so that it can fully fit the working state of the proportional valve, the value of the pressure variation coefficient is set not only related to the model of the gas water heater, but also related to the secondary pressure of combustion; at this time, the current change information and pressure change information of the proportional valve can be obtained in real time to determine the pressure variation coefficient. Specifically, Figure 3 FIG. 1 is a flow chart of determining a pressure variation coefficient in a control method for a gas water heater according to an embodiment of the present invention. Figure 3 As shown, the pressure variation coefficient can be determined as follows:

[0079] Step 310: Acquire current change information of the proportional valve and corresponding pressure change information.

[0080] In the embodiment of the present invention, the current change information is used to characterize the change of the proportional current within a preset time, and the pressure change information is used to characterize the change of the proportional valve secondary pressure within a preset time. That is, the change of the proportional current and the corresponding combustion secondary pressure within a preset time is obtained.

[0081] Step 320: Based on the current change information and the pressure change information, calculate the corresponding relationship between the proportional current and the proportional valve secondary pressure to obtain the pressure change coefficient.

[0082] In the embodiment of the present invention, the pressure change information is divided by the current change information to calculate the corresponding relationship between the proportional current and the secondary pressure of the proportional valve, thereby obtaining the pressure change coefficient.

[0083] In one embodiment, in order to ensure the reliability of updating the locking current, in actual applications, a table lookup can be performed based on the model information of the gas water heater. If the pressure variation coefficient corresponding to the model information of the gas water heater can be found, the pressure variation coefficient found will be used as the pressure variation coefficient currently used; if the pressure variation coefficient corresponding to the model information of the gas water heater cannot be found, the pressure variation coefficient can be calculated according to the method shown in the above steps 310-320.

[0084] In one embodiment, in the above embodiment, the small-end current used when updating the locking current is obtained through adjustment, and the small-end current is specifically obtained by adjusting the proportional current based on the small-end thermal efficiency value. Among them, the method for adjusting the small-end current can be as follows: adjust the proportional current to adjust the current thermal efficiency value to the small-end thermal efficiency value; determine the proportional current corresponding to the small-end thermal efficiency value as the small-end current. Among them, the small-end thermal efficiency value is the thermal efficiency value of the gas water heater at the minimum working pressure, and the thermal efficiency value refers to the proportion of the gas water heater that effectively utilizes thermal energy; the small-end thermal efficiency value of the gas water heater is fixed. In order to achieve the matching of the proportional valve and the secondary pressure of the combustion, it is necessary to make the thermal efficiency value corresponding to the small-end current of the proportional valve consistent with the small-end thermal efficiency value, so the proportional current corresponding to the small-end thermal efficiency value is determined as the small-end current.

[0085] In one embodiment, when the gas water heater enters the regulation mode, not only the small-end current is adjusted, but also the large-end current. The large-end current is the proportional current of the gas water heater at the maximum working pressure. The small-end current and the large-end current are adjusted separately, and the proportional current and the combustion secondary pressure themselves are linearly changed. By adjusting the small-end current and the large-end current, it can be ensured that the proportional current and the combustion secondary pressure are always in a matching state.

[0086] In one embodiment, the large-end thermal efficiency value is obtained, and the proportional current is adjusted based on the large-end thermal efficiency value to obtain the large-end current. The method for adjusting the large-end current can be as follows: adjust the proportional current to adjust the current proportional valve secondary pressure to the large-end thermal efficiency value; determine the proportional current corresponding to the large-end thermal efficiency value as the large-end current. The large-end thermal efficiency value is the thermal efficiency value of the gas water heater at the maximum working pressure, and the thermal efficiency value refers to the proportion of the gas water heater that effectively utilizes thermal energy; the large-end thermal efficiency value of the gas water heater is fixed. In order to achieve the matching of the proportional valve and the combustion secondary pressure, the thermal efficiency value corresponding to the large-end current of the proportional valve needs to be consistent with the large-end thermal efficiency value, so the proportional current corresponding to the large-end thermal efficiency value is determined as the large-end current.

[0087] The control method of the gas water heater provided by the embodiment of the present invention obtains the small-end current and the pre-locking current difference in response to entering the regulation mode; determines the current locking current based on the small-end current and the pre-locking current difference to update the locking current; and controls the operation of the gas water heater based on the current locking current in response to exiting the regulation mode. The current small-end current and the pre-locking current difference are obtained, and the locking current is determined based on the small-end current and the pre-locking current difference. When the small-end current changes due to pressure drift in the proportional valve, the locking current can be updated so that the proportional current can be smoothly adjusted to the small-end current, effectively avoiding the situation where the small-end current is less than the locking current and the pressure of the gas water heater is out of adjustment, thereby improving the reliability of the gas water heater.

[0088] According to another aspect of an embodiment of the present invention, a controller is provided. Figure 4 is a schematic diagram of the structure of a controller provided by an optional embodiment of the present invention, such as Figure 4 As shown, the controller includes one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the controller, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple controllers can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 4 A processor 10 is taken as an example.

[0089] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0090] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0091] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created according to the use of the controller, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the controller via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0092] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0093] The controller further comprises a communication interface 30 for the controller to communicate with other devices or a communication network.

[0094] According to an embodiment of the present invention, on the other hand, a gas water heater is provided, comprising a controller, wherein the controller is used to execute the control method of the gas water heater as described in any of the above embodiments.

[0095] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The specific contents of the above specific implementations only express several implementations of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A control method for a gas water heater, characterized in that: The method comprises: In response to entering the regulation mode, obtaining the small-end current and the pre-lock current difference; Determine a current locking current based on the difference between the small-end current and the pre-locking current to update the locking current; In response to exiting the regulation mode, the gas water heater is controlled to operate based on the current locking current.

2. The method according to claim 1, characterized in that Get the pre-lock current difference, including: Obtain the pre-locking pressure difference and the pressure variation coefficient corresponding to the proportional current; The pre-locking current difference is determined based on the pre-locking pressure difference and the pressure variation coefficient.

3. The method according to claim 2, characterized in that The pressure variation coefficient is determined as follows: Obtain current change information and corresponding pressure change information of the proportional valve; the current change information is used to characterize the change of the proportional current within a preset time, and the pressure change information is used to characterize the change of the secondary pressure of the proportional valve within the preset time; Based on the current change information and the pressure change information, the corresponding relationship between the proportional current and the secondary pressure of the proportional valve is calculated to obtain the pressure change coefficient.

4. The method according to claim 2, characterized in that: The method for determining the pressure variation coefficient also includes: Based on the model information of the gas water heater, the pressure variation coefficient is obtained by looking up a table.

5. The method according to claim 1, characterized in that Get the pre-lock current difference, including: Based on the model information of the gas water heater, the pre-locking current difference is obtained by looking up a table.

6. The method according to claim 1, characterized in that The small-end current is obtained by adjusting the proportional current based on the small-end thermal efficiency value; The adjusting of the proportional current based on the small-end thermal efficiency value includes: Adjusting the proportional current to adjust the current thermal efficiency value to the small-end thermal efficiency value; The proportional current corresponding to the small-end thermal efficiency value is determined as the small-end current.

7. The method according to claim 1, characterized in that The method further comprises: A large-end thermal efficiency value is obtained, and a proportional current is adjusted based on the large-end thermal efficiency value to obtain a large-end current.

8. The method according to claim 7, characterized in that The step of adjusting the proportional current based on the large-end thermal efficiency value to obtain the large-end current includes: Adjusting the proportional current to adjust the current proportional valve secondary pressure to the large-end thermal efficiency value; The proportional current corresponding to the large-end thermal efficiency value is determined as the large-end current.

9. A controller, characterized in that: It comprises a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the control method of the gas water heater described in any one of claims 1 to 8 by executing the computer instructions.

10. A gas water heater, characterized in that: It comprises a controller, and the controller is used to execute the control method of the gas water heater as described in any one of claims 1-8.

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