Ignition control method of gas water heater controller and gas water heater

Abstract

The invention relates to the technical field of gas water heater control, and discloses an ignition control method of a gas water heater controller and a gas water heater, the ignition control method comprises the steps that a feedback signal sent by a driving controller of a direct current fan is received, and the feedback signal carries a signal duty ratio and a signal frequency; the signal type of the feedback signal is judged based on the signal duty ratio of the feedback signal, the signal type comprises an identification signal and a rotation speed signal, and the identification signal and the rotation speed signal correspond to different duty ratio ranges respectively; and if the feedback signal is the rotating speed signal, the gas water heater is controlled to ignite and heat based on the signal frequency of the feedback signal. According to the method, the feedback signal sent by the direct-current fan is recognized, so that the gas water heater is controlled to ignite and heat under the condition that the direct-current fan sends the rotating speed signal, the situation that the recognition signal is mistakenly used as the rotating speed signal and mistakenly ignited under the condition that the direct-current fan is not started due to the fact that the control line is abnormal is avoided, and the safety of a product is improved.

Description

Technical Field

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

[0002] After the gas water heater is powered on, the gas water heater will detect the water flow in real time to identify user water use. When the detected water flow is greater than a certain threshold, it is determined that the user is using water, and then the gas water heater is controlled to ignite. In order to improve the safety of ignition, the blower is usually started before the gas water heater ignites for pre-purging work. Therefore, it is crucial to ensure that the blower has started before the gas water heater ignites.

[0003] In the prior art, the gas water heater controller usually starts the pulse igniter of the gas water heater only when it determines that the rotational speed frequency fed back by the drive controller of the DC blower is greater than the set threshold. Specifically, when the drive controller of the DC blower detects that the PWM (Pulse Width Modulation) signal sent by the main controller of the gas water heater is at a low level, it sends a frequency signal to the main controller through the FG (Frequency Generator, rotational speed feedback) signal line. Further, for the startup process of the gas water heater, if the drive controller of the DC blower does not detect the PWM control signal sent by the main controller, the drive controller will send an identification signal to the main controller for the main controller to determine parameters such as the model of the DC blower. The frequency of the identification signal is usually greater than the frequency of the rotational speed signal.

[0004] However, the PWM signal receiving terminal of the DC blower drive controller may have problems such as poor contact due to long-term use. After the gas water heater is powered on and started in this case, when the main controller sends a PWM control signal to the DC blower to control the start of the DC blower, the DC blower does not receive the PWM control signal due to reasons such as poor contact of the signal receiving terminal. However, the drive controller of the DC blower also sends an identification signal to the main controller. Based on the ignition control logic in the related art, when the main controller receives the PWM signal fed back by the drive controller, it determines whether to ignite only by judging whether the frequency of the PWM signal is greater than the set threshold, and the frequency of the identification signal corresponding to the PWM signal is greater than the frequency of the rotational speed signal corresponding to the PWM signal. Therefore, for the scenario where the DC blower driver fails to receive the PWM control signal sent by the main controller normally due to reasons such as loose wiring terminals, there is a risk of misfiring when the main controller receives the PWM signal sent by the drive controller. In this case, since the DC blower does not receive the PWM control signal, it does not start. Igniting without the DC blower starting will cause a large amount of gas to accumulate inside the gas water heater, posing a risk of deflagration. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an ignition control method for a gas water heater controller and a gas water heater, which effectively solve the problem that the ignition cannot be correctly controlled due to poor contact of the wiring terminals.

[0006] The above technical problem is solved by the following technical solutions:

[0007] An ignition control method for a gas water heater controller, the method comprising:

[0008] Receiving a feedback signal sent by a drive controller of a DC fan, the feedback signal carrying a signal duty cycle and a signal frequency;

[0009] Based on the signal duty cycle of the feedback signal, determining the signal type of the feedback signal, wherein the signal type includes an identification signal and a rotation speed signal, and the identification signal and the rotation speed signal respectively correspond to different duty cycle ranges;

[0010] If the feedback signal is a rotation speed signal, controlling the ignition heating of the gas water heater based on the signal frequency of the feedback signal.

[0011] Compared with the background art, the ignition control method of the gas water heater controller of the present invention has the following beneficial effects: The ignition control method provided by the embodiments of the present invention for the first time distinguishes the duty cycle ranges of the identification signal and the rotation speed signal, so that when identifying the feedback signal sent by the DC fan, the rotation speed signal can be accurately identified, so as to control the gas water heater to perform ignition heating only when the DC fan sends a rotation speed signal. Therefore, the embodiments of the present invention can avoid misidentifying the identification signal as the rotation speed signal and misfiring when the DC fan is not started due to abnormal control lines, thereby reducing the risk of deflagration and improving the safety of the product.

[0012] In one embodiment, the determining the signal type of the feedback signal based on the signal duty cycle of the feedback signal includes:

[0013] If the signal duty cycle of the feedback signal is within a first preset range, determining that the feedback signal is an identification signal;

[0014] If the signal duty cycle of the feedback signal is within a second preset range, determining that the feedback signal is a rotation speed signal;

[0015] Wherein, the first preset range and the second preset range do not overlap.

[0016] In one embodiment, the determining the signal type of the feedback signal based on the signal duty cycle of the feedback signal includes:

[0017] If the signal duty cycle of the feedback signal is not within the first preset range and the second preset range, ignition control is not performed.

[0018] In one embodiment, if the feedback signal is a rotational speed signal, controlling the ignition heating of the gas water heater based on the signal frequency of the feedback signal includes:

[0019] If the feedback signal is a rotational speed signal, when the signal frequency of the feedback signal is greater than a first preset threshold, control the ignition heating of the gas water heater.

[0020] In one embodiment, if the feedback signal is a rotational speed signal, controlling the ignition heating of the gas water heater based on the signal frequency of the feedback signal includes:

[0021] If the feedback signal is a rotational speed signal, when the signal frequency of the feedback signal is greater than a first preset threshold and the gas water heater controller has output a fan start signal to the drive controller, control the ignition heating of the gas water heater.

[0022] In one embodiment, after determining the signal type of the feedback signal based on the signal duty cycle of the feedback signal, the method further includes:

[0023] If the feedback signal is the identification signal, determine whether a fan start signal has been output to the drive controller;

[0024] If a fan start signal has been output to the drive controller, determine that there is an abnormality in the pulse width modulation control signal line between the gas water heater controller and the drive controller, and send a reminder message.

[0025] In one embodiment, the sending the reminder message includes:

[0026] Control the gas water heater to display the preset identifier, and the preset identifier is used to indicate that there is an abnormality in the pulse width modulation control signal line.

[0027] In one embodiment, after determining the signal type of the feedback signal based on the signal duty cycle of the feedback signal, the method further includes:

[0028] If the feedback signal is the identification signal, determine the control parameters corresponding to the DC fan based on the signal frequency of the identification signal.

[0029] A controller of a gas water heater, the controller includes:

[0030] A memory and a processor, which are communicatively connected to each other. Computer instructions are stored in the memory, and the processor executes the above-mentioned ignition control method of the gas water heater controller by executing the computer instructions.

[0031] A gas water heater, which includes the above-mentioned controller. Description of the Drawings

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 It is a schematic flowchart of the ignition control method of the gas water heater controller according to the embodiment of the present invention;

[0034] Figure 2 It is a schematic structural diagram of the controller of the gas water heater according to the embodiment of the present invention. Detailed Embodiments

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0037] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0038] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0039] After the gas water heater is powered on, usually when the rotational speed frequency fed back by the drive controller of the DC fan is greater than the set threshold, the pulse igniter of the gas water heater starts to ignite. Specifically, when the drive controller of the DC fan detects that the PWM (Pulse Width Modulation) signal sent by the main controller of the gas water heater is at a low level, it sends a frequency signal to the main controller through the FG (Frequency Generator, rotational speed feedback) signal line. Further, for the startup process of the gas water heater, if the drive controller of the DC fan does not detect the PWM control signal sent by the main controller, the drive controller will send an identification signal to the main controller for the main controller to determine parameters such as the model of the DC fan. The frequency of the identification signal is usually greater than the frequency of the rotational speed signal.

[0040] However, there are situations such as poor contact of the PWM signal receiving terminal of the DC fan drive controller due to long-term use. After the gas water heater is powered on and started in this situation, when the main controller sends a PWM control signal to the DC fan to control the startup of the DC fan, the DC fan does not receive the PWM control signal due to reasons such as poor contact of the signal receiving terminal. However, the drive controller of the DC fan also sends an identification signal to the main controller. Based on the ignition control logic in the related art, when the main controller receives the PWM signal fed back by the drive controller, it determines whether to ignite only by judging whether the frequency of the PWM signal is greater than the set threshold, and the frequency of the identification signal corresponding to the PWM signal is greater than the frequency of the PWM signal corresponding to the rotational speed signal. Therefore, for the scenario where the DC fan driver fails to receive the PWM control signal sent by the main controller normally due to reasons such as loose wiring terminals, there is a risk of misfiring when the main controller receives the PWM signal sent by the drive controller. In this case, since the DC fan does not receive the PWM control signal, it does not start. Igniting in the case where the DC fan does not start will cause a large amount of gas to accumulate inside the gas water heater, posing a risk of deflagration. Based on this, the embodiments of the present invention provide an ignition control method for a gas water heater controller.

[0041] According to an embodiment of the present invention, there is provided an ignition control method for a gas water heater controller, which is applied to the main controller of the gas water heater.Figure 1 is a flowchart of the ignition control method of a gas water heater controller according to an embodiment of the present invention. As Figure 1 shown, the process includes the following steps:

[0042] Step S101, receiving a feedback signal sent by the drive controller of the DC fan.

[0043] After the gas water heater is powered on, the drive controller of the DC fan sends a feedback signal to the main controller of the gas water heater. The feedback signal is generated and sent by the drive controller of the DC fan according to the operating state of the DC fan or other relevant parameters. Among them, the feedback signal carries a signal duty cycle and a signal frequency. The signal duty cycle refers to the ratio of the time the signal is at a high level within one cycle to the entire cycle time, and the signal frequency indicates the number of times the signal repeats per second.

[0044] Step S102, judging the signal type of the feedback signal based on the signal duty cycle of the feedback signal.

[0045] Among them, the signal types include an identification signal and a rotation speed signal, and the identification signal and the rotation speed signal respectively correspond to different duty cycle ranges.

[0046] In different scenarios, the signal types of the feedback signals sent by the drive controller of the DC fan to the main controller of the gas water heater are different. When the gas water heater is only powered on, the drive controller of the DC fan will actively send an identification signal to the main controller of the gas water heater. The identification signal carries information such as the manufacturer and model of the DC fan. Control strategies for different models of DC fans are stored in the main controller. By looking up the corresponding control strategy according to the model of the DC fan, the DC fan can be controlled according to the corresponding control strategy. When the gas water heater is powered on and the main controller of the gas water heater recognizes that the user is using water and sends a control signal to start the fan to the drive controller of the DC fan, the feedback signal sent by the drive controller of the DC fan to the main controller of the gas water heater is a rotation speed signal, and the rotation speed signal carries the rotation speed information of the DC fan.

[0047] The duty cycle of the identification signal and the duty cycle of the rotation speed signal are respectively set within corresponding specific ranges to distinguish these two rotation speed signals.

[0048] After receiving the feedback signal from the drive controller of the DC fan, the main controller of the gas water heater judges the signal type of the feedback signal according to the signal duty cycle of the feedback signal. Specifically, it can be judged whether the signal duty cycle of the feedback signal is within the specific range corresponding to the set identification signal or the specific range corresponding to the rotation speed signal, so as to determine the signal type to which the feedback signal belongs according to the judgment result.

[0049] Step S103: If the feedback signal is a rotational speed signal, control the ignition and heating of the gas water heater based on the frequency of the feedback signal.

[0050] The drive controller of the DC fan will only start the DC fan and feedback the rotational speed signal when it receives the control signal sent by the main controller. After judgment, when the feedback signal is a rotational speed signal, further judge whether the frequency of the feedback signal meets the preset conditions, such as being greater than the set threshold. When the conditions are met, the main controller controls the ignition and heating of the gas water heater.

[0051] The ignition control method of the gas water heater controller provided by the embodiment of the present invention includes receiving the feedback signal sent by the drive controller of the DC fan, where the feedback signal carries the signal duty cycle and the signal frequency; judging the signal type of the feedback signal based on the signal duty cycle of the feedback signal, where the signal type includes an identification signal and a rotational speed signal, and the identification signal and the rotational speed signal respectively correspond to different duty cycle ranges; if the feedback signal is a rotational speed signal, control the ignition and heating of the gas water heater based on the signal frequency of the feedback signal. This method first distinguishes the duty cycle ranges of the identification signal and the rotational speed signal, so that when identifying the feedback signal sent by the DC fan, the rotational speed signal can be accurately identified, so as to control the gas water heater to ignite and heat only when the DC fan sends a rotational speed signal. Therefore, the embodiment of the present invention can avoid misidentifying the identification signal as the rotational speed signal and misfiring when the DC fan is not started due to abnormal control lines, thereby reducing the risk of deflagration and improving the safety of the product.

[0052] According to an embodiment of the present invention, there is provided an ignition control method for a gas water heater controller, and the process includes the following steps:

[0053] Step S201: Receive the feedback signal sent by the drive controller of the DC fan.

[0054] For the details of step S201, please refer to step S101, which will not be elaborated here.

[0055] Step S202: Judge the signal type of the feedback signal based on the signal duty cycle of the feedback signal.

[0056] Specifically, step S202 includes:

[0057] Step S2021: If the signal duty cycle of the feedback signal is within the first preset range, determine that the feedback signal is an identification signal.

[0058] Step S2022: If the signal duty cycle of the feedback signal is within the second preset range, determine that the feedback signal is a rotational speed signal.

[0059] Among them, the first preset range and the second preset range do not overlap. After receiving the duty cycle of the feedback signal, the signal duty cycle of the feedback signal is respectively compared with the first preset range and the second preset range. The first preset range and the second preset range do not overlap and have a large gap, but the size relationship between the first preset range and the second preset range is not limited. As an example, the maximum value of the first preset range is less than the minimum value of the second preset range, and the difference between the maximum value of the first preset range and the minimum value of the second preset range is 20% or more; or, the minimum value of the first preset range is greater than the maximum value of the second preset range, and the difference between the minimum value of the first preset range and the maximum value of the second preset range is 20% or more.

[0060] It should be noted that there is no defined size relationship between the duty cycle of the rotation speed signal and the duty cycle of the identification signal. It can be that the duty cycle of the rotation speed signal is greater than the duty cycle of the identification signal, or the duty cycle of the rotation speed signal is less than the duty cycle of the identification signal. For example, the first preset range is 25% to 35%, and the second preset range is 55% to 65%; it can also be that the first preset range is 55% to 65%, and the second preset range is 25% to 35%.

[0061] By defining that the first preset range and the second preset range do not overlap, it is convenient for the main controller to accurately identify the signal type of the feedback signal. Further, the difference between the two ranges is 20% or more, which can avoid misidentification caused by fluctuations in the duty cycle size and improve the accuracy of identification.

[0062] Step S2023, if the signal duty cycle of the feedback signal is not within the first preset range and the second preset range, no ignition control is performed.

[0063] After receiving the feedback signal sent by the drive controller of the DC fan, the duty cycle of the feedback signal is respectively compared with the first preset range and the second preset range to determine whether the duty cycle of the feedback signal falls within the first preset range or the second preset range. If the duty cycle of the feedback signal is neither within the first preset range nor within the second preset range, it indicates that the feedback signal is neither an identification signal nor a rotation speed signal. Since the ignition control of the gas water heater is a key safety operation, if the type of the feedback signal cannot be identified, in order to avoid potential safety risks such as gas leakage or incomplete combustion, in this scenario, no ignition heating is performed.

[0064] Step S203, if the feedback signal is a rotation speed signal, control the ignition heating of the gas water heater based on the frequency of the feedback signal.

[0065] Specifically, step S203 includes:

[0066] Step S2031, if the feedback signal is a rotational speed signal, when the signal frequency of the feedback signal is greater than the first preset threshold, control the gas water heater to ignite and heat up.

[0067] After determining that the feedback signal is a rotational speed signal, further compare the signal frequency of the feedback signal with a preset first preset threshold. The first preset threshold is a frequency value set according to system design and safety requirements, and is used to determine whether the frequency of the rotational speed signal is high enough to support the ignition and heating of the gas water heater. As an example, the first preset threshold is 54 Hz.

[0068] If the frequency of the feedback signal is greater than the first preset threshold, the system considers that the current rotational speed of the fan is high enough to ensure that the gas water heater can obtain sufficient air supply after ignition, so as to achieve safe and effective combustion. Therefore, the main controller controls the gas water heater to ignite and heat up.

[0069] Step S2032, if the feedback signal is a rotational speed signal, when the signal frequency of the feedback signal is greater than the first preset threshold and the gas water heater controller outputs a fan start signal to the drive controller, control the gas water heater to ignite and heat up.

[0070] After determining that the feedback signal is a rotational speed signal, further compare the signal frequency of the feedback signal with a preset first preset threshold. The first preset threshold is a frequency value set according to system design and safety requirements, and is used to determine whether the frequency of the rotational speed signal is high enough to support the ignition and heating of the gas water heater. As an example, the first preset threshold is 54 Hz.

[0071] In addition, the main controller also checks whether a fan start signal has been sent to the drive controller of the DC fan. The fan start signal is an instruction to control the fan to start running, indicating that the system is ready to start the operation of the fan.

[0072] When the frequency of the feedback signal is greater than the first preset threshold and the gas water heater controller has output a fan start signal, the main controller will control the gas water heater to perform the ignition and heating operation.

[0073] Ensure that the DC fan is in a running state before ignition and the rotational speed is high enough to provide sufficient air supply, thus improving the safety and reliability of ignition and heating. At the same time, it can avoid the situation of misfiring and heating when the fan chip mistakenly sends a rotational speed signal to the main controller and the main controller does not send a fan start signal for the DC fan.

[0074] In some alternative embodiments, after step S202, the method further includes:

[0075] Step 301, if the feedback signal is an identification signal, determine whether there is an output fan start signal sent to the drive controller;

[0076] Step 302, if there is an output fan start signal sent to the drive controller, determine that there is an abnormality in the pulse width modulation control signal line between the gas water heater controller and the drive controller, and send a reminder message.

[0077] After determining that the feedback signal is an identification signal, the main controller further determines whether a fan start signal has been sent to the drive controller of the DC fan. The fan start signal is an instruction to control the DC fan to start running and is transmitted to the drive controller of the DC fan through a specific signal line (such as a pulse width modulation control signal line).

[0078] The identification signal usually does not directly trigger the start of the fan but is used for device identification or configuration. If the main controller sends a fan start signal to the drive controller of the DC fan and the received feedback signal is an identification signal, it indicates that there is an abnormality in the pulse width modulation control signal line between the gas water heater controller and the drive controller, such as poor contact or damage, and a reminder message is sent. The reminder message is displayed on the display screen of the gas water heater.

[0079] Furthermore, sending a reminder message includes: controlling the gas water heater to display a preset identifier, where the preset identifier is used to characterize an abnormality in the pulse width modulation control signal line.

[0080] In the above scenario, if it is determined that there is an abnormality in the pulse width modulation control signal line between the gas water heater controller and the drive controller, a reminder message is sent. The preset identifier is a specific display mode or symbol pre-set on the display panel of the gas water heater and is used to indicate a certain specific abnormal situation in the system. In this embodiment, the preset identifier is used to characterize an abnormality in the pulse width modulation control signal line. The preset identifier can be a specific icon, text prompt, or code. As an example, the preset identifier is "PE".

[0081] By accurately identifying an abnormality in the pulse width modulation control signal line and sending a prompt message, the maintenance efficiency is improved.

[0082] In some alternative embodiments, after step S202, the method further includes:

[0083] Step S303, if the feedback signal is an identification signal, determine the control parameters corresponding to the DC fan based on the signal frequency of the identification signal.

[0084] DC fans from different manufacturers have corresponding control parameters. The signal frequencies of the identification signals from different manufacturers are different. The corresponding relationships between the manufacturers, the signal frequencies of the identification signals, and the control parameters are stored in the main controller. After determining that the feedback signal is an identification signal, the corresponding manufacturer of the DC fan is determined according to the signal frequency of the identification signal, and then the control parameters corresponding to the model of the DC fan are determined according to the manufacturer.

[0085] After determining the control parameters of the DC fan, the main controller generates a control command for the DC fan and sends the control command to the drive controller of the DC fan. The drive controller adjusts the operating state of the DC fan according to the control command.

[0086] An embodiment of the present invention provides a controller for a gas water heater, as Figure 2 shown. Figure 2 FIG. is a schematic structural diagram of a controller for a gas water heater provided by an optional embodiment of the present invention. As Figure 2 shown, the controller of the gas water heater includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including a high-speed interface and a low-speed interface. Each component communicates with each other using different buses and can be installed on a common main board or installed in other ways as needed. The processor can process instructions executed within the controller of the gas water heater, including instructions stored in the memory or on the memory to display 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 of gas water heaters can be connected, and each device provides some necessary operations (for example, as a server array, a set of blade servers, or a multi-processor system). Figure 2 In FIG., one processor 10 is taken as an example.

[0087] The processor 10 can be a central processing unit, a network processor, or a combination thereof. Among them, the processor 10 can further include a hardware chip. The above hardware chip can be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The above programmable logic device can be a complex programmable logic device, a field programmable gate array, a general array logic, or any combination thereof.

[0088] Among them, 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 embodiments.

[0089] The memory 20 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the controller of the gas water heater and the like. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some alternative embodiments, the memory 20 may optionally include a memory remotely provided relative to the processor 10, and these remote memories can be connected to the controller of the gas water heater through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0090] The memory 20 may include a volatile memory, for example, a random access memory; the memory may also include a non-volatile memory, for example, a flash memory, a hard disk, or a solid-state drive; the memory 20 may further include a combination of the above types of memories.

[0091] The controller of the gas water heater further includes a communication interface 30 for the controller of the gas water heater to communicate with other devices or a communication network.

[0092] An embodiment of the present invention further provides a gas water heater having the above controller.

[0093] In the specific content of the above specific embodiments, each technical feature can be combined arbitrarily without contradiction. For the sake of brevity of description, not all possible combinations of the above technical features are described. However, as long as the combinations of these technical features do not exist in contradiction, they should be considered as the scope recorded in this specification.

[0094] The specific content of the above specific embodiments only expresses several embodiments of the present invention, and its description is relatively specific and detailed, but it should not be understood as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. An ignition control method for a gas water heater controller, characterized in that, The method includes: Receiving a feedback signal sent by a drive controller of a DC fan, where the feedback signal carries a signal duty cycle and a signal frequency; Based on the signal duty cycle of the feedback signal, determining the signal type of the feedback signal, where the signal type includes an identification signal and a rotation speed signal, and the identification signal and the rotation speed signal respectively correspond to different duty cycle ranges; If the feedback signal is a rotation speed signal, controlling the ignition heating of the gas water heater based on the signal frequency of the feedback signal.

2. The method according to claim 1, characterized in that, The determining the signal type of the feedback signal based on the signal duty cycle of the feedback signal includes: If the signal duty cycle of the feedback signal is within a first preset range, determining that the feedback signal is an identification signal; If the signal duty cycle of the feedback signal is within a second preset range, determining that the feedback signal is a rotation speed signal; Wherein, the first preset range and the second preset range do not overlap.

3. The method according to claim 2, wherein The determining the signal type of the feedback signal based on the signal duty cycle of the feedback signal includes: If the signal duty cycle of the feedback signal is not within the first preset range and the second preset range, no ignition control is performed.

4. The method according to claim 1, wherein The controlling the ignition heating of the gas water heater based on the signal frequency of the feedback signal if the feedback signal is a rotation speed signal includes: If the feedback signal is a rotation speed signal, when the signal frequency of the feedback signal is greater than a first preset threshold, controlling the ignition heating of the gas water heater.

5. The method according to claim 1, characterized in that The controlling the ignition heating of the gas water heater based on the signal frequency of the feedback signal if the feedback signal is a rotation speed signal includes: If the feedback signal is a rotation speed signal, when the signal frequency of the feedback signal is greater than a first preset threshold and the gas water heater controller outputs a fan start signal to the drive controller, controlling the ignition heating of the gas water heater.

6. The method according to claim 1, characterized in that After determining the signal type of the feedback signal based on the signal duty cycle of the feedback signal, the method further includes: If the feedback signal is the identification signal, determining whether a fan start signal is output to the drive controller; If a fan start signal is output to the drive controller, determining that there is an abnormality in the pulse width modulation control signal line between the gas water heater controller and the drive controller, and sending a reminder message.

7. The method according to claim 6, wherein The sending the reminder message includes: Controlling the gas water heater to display a preset identifier, where the preset identifier is used to indicate that there is an abnormality in the pulse width modulation control signal line.

8. The method according to claim 1, wherein After determining the signal type of the feedback signal based on the signal duty cycle of the feedback signal, the method further includes: If the feedback signal is the identification signal, determining control parameters corresponding to the DC fan based on the signal frequency of the identification signal.

9. A controller for a gas water heater, characterized in that, The controller includes: A memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to execute the ignition control method of the gas water heater controller according to any one of claims 1 to 8.

10. A gas water heater, characterized in that, The gas water heater includes the controller according to claim 9.

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