Direct-current fan control method of water heater, water heater and storage medium

Abstract

The invention relates to a direct-current fan control method of a water heater, the water heater and a storage medium, and the method comprises the steps that the current rotating speed of a fan is obtained in real time, and based on the numerical relationship between the current rotating speed and a first ideal rotating speed, if it is judged that the rotating speed of the fan needs to be increased, the fan is started; if yes, the actual rotating speed after the rotating speed increasing operation is executed on the fan is obtained in real time, whether the current value of the fan is adjusted or not is judged based on the difference relation between the actual rotating speed and the second ideal rotating speed, and if the current value of the fan is adjusted, the fan runs according to the rotating speed after the current value of the fan is adjusted. And when the fan of the water heater is subjected to small external air pressure, larger noise cannot be generated, and the user experience is improved. When the water heater encounters large external air pressure, the rotating speed of the fan can be adjusted, so that the combustion state of gas is improved, the high air pressure resistance of the fan is guaranteed, and self-adaptive adjustment of the fan is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of water heaters, and in particular to a direct current fan control method for a water heater, a water heater and a storage medium. Background Art

[0002] At present, gas water heaters on the market use AC fans and DC fans. The AC fan's ability to resist wind pressure is relatively weak, and the control scheme of the DC fan is mainly based on the size of the external wind pressure. The fan power increases linearly until a fault is reported. However, when the external wind pressure increases and the fan speed increases, it will cause a lot of noise, thereby affecting the user experience, and even falsely reporting a fault when the water heater is in an operating state. If the fan speed is simply controlled not to increase, the combustion state of the gas cannot be improved, resulting in the inability to guarantee the fan's ability to resist wind pressure.

[0003] Therefore, how to control the DC fan of the gas water heater to ensure the fan's wind pressure resistance and reduce the noise as much as possible has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] In view of the above, the present application provides a DC fan control method for a water heater, a water heater and a storage medium, the purpose of which is to solve the above technical problems.

[0005] In a first aspect, the present application provides a method for controlling a DC fan of a water heater, the method comprising:

[0006] Get the current speed of the fan in real time;

[0007] Based on the numerical relationship between the current rotation speed and a preset first ideal rotation speed, determining whether to increase the rotation speed of the fan;

[0008] If yes, obtaining in real time the actual speed of the fan after performing the speed increase operation;

[0009] Based on the difference between the actual rotation speed and a preset second ideal rotation speed, determining whether to adjust the current value of the fan;

[0010] If so, the fan is controlled according to the rotational speed after adjusting the fan current value.

[0011] In a second aspect, the present application provides a DC fan control device for a water heater, the device comprising a unit for executing the DC fan control method for a water heater described in any embodiment of the first aspect.

[0012] In a third aspect, the present application provides a water heater, the water heater further comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0013] Memory, used to store programs;

[0014] The processor is used to implement the DC fan control method of the water heater described in any embodiment of the first aspect when executing the program stored in the memory.

[0015] In a fourth aspect, a computer-readable storage medium is provided, on which a program is stored. When the program is executed by a processor, the DC fan control method of the water heater described in any embodiment of the first aspect is implemented.

[0016] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0017] This application obtains the current speed of the fan in real time, and based on the numerical relationship between the current speed and the first ideal speed, if it is determined that the fan needs to be increased in speed, the actual speed after the fan is increased in speed is obtained in real time, and based on the difference between the actual speed and the second ideal speed, it is determined whether to adjust the current value of the fan, and if the current value of the fan is adjusted, the fan is operated according to the speed after the current value of the fan is adjusted. When the fan of the water heater is subjected to a relatively small external wind pressure, the fan speed does not need to be increased, and no greater noise is generated at this time, which improves the user experience. At the same time, the exhaust gas emissions meet the standards and reduce the false alarm state of the water heater. When the water heater encounters a relatively large external wind pressure, the fan speed can be adjusted to improve the combustion state of the gas, ensure the fan's high wind pressure resistance, and thus achieve adaptive adjustment of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0021] Figure 1 A schematic flow chart of an embodiment of a DC fan control method for a water heater of the present application;

[0022] Figure 2 A schematic diagram showing the relationship between the fan speed and the external wind pressure in the embodiment of the present application;

[0023] Figure 3 This is a module schematic diagram of a DC fan control method device for a water heater of the present application;

[0024] Figure 4 A schematic diagram of an embodiment of a water heater of the present application;

[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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 making creative work are within the scope of protection of this application.

[0027] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0028] The present application provides a method for controlling a DC fan of a water heater. Figure 1 , which is a schematic diagram of a method flow of an embodiment of a DC fan control method for a water heater of the present application. The method can be executed by an electronic device (e.g., a water heater), and the water heater can be implemented by software and / or hardware. The method includes:

[0029] Step S10: obtaining the current speed of the fan in real time;

[0030] Step S20: Based on the numerical relationship between the current rotation speed and the preset first ideal rotation speed, determining whether to increase the rotation speed of the fan;

[0031] Step S30: If yes, obtaining in real time the actual speed of the fan after performing the speed increase operation;

[0032] Step S40: determining whether to adjust the current value of the fan based on the difference between the actual rotation speed and a preset second ideal rotation speed;

[0033] Step S50: If yes, the fan is controlled according to the rotation speed after adjusting the fan current value.

[0034] The function of the gas water heater fan is to send air into the combustion chamber to provide oxygen required for gas combustion. The exhaust gas generated after gas combustion is also discharged through the fan, thereby improving combustion efficiency, reducing gas consumption, and reducing harmful gas emissions. The solution of this application is described by taking the fan as a DC fan as an example.

[0035] During the operation of the DC fan of the gas water heater, due to the influence of the external environment (for example, the wind pressure generated by the natural wind), the fan will encounter resistance or form a blockage. Due to the characteristics of the DC fan, when the current provided to the fan remains unchanged, if the external wind pressure increases or the fan forms a blockage, the load of the fan will become smaller (that is, the work done by the fan on the gas water heater will become smaller), and the fan speed will increase, resulting in high noise and affecting the user experience. To this end, the DC fan control method provided by the present application is used to improve the wind pressure resistance of the fan, improve the safety and comfort of the water heater, reduce the noise generated by the water heater, improve the user experience, and reduce the false alarm failure phenomenon of wind pressure resistance.

[0036] Specifically, after the fan is started, the current speed of the fan (denoted as V 实1 ), since the fan may be affected by the wind pressure of the external unit during operation, the fan's work on the gas water heater may become smaller, so it is necessary to adjust the current speed and the first ideal speed (denoted as V 0 ) is used to determine whether to increase the speed of the fan. For example, if the current speed is much smaller than the first ideal speed, it means that the resistance encountered by the fan is small at this time, and there is no need to increase the speed of the fan. If the current speed is much larger than the first ideal speed, it means that the resistance encountered by the fan is large at this time, and the speed of the fan needs to be increased.

[0037] Specifically, the above step of "determining whether to increase the speed of the fan based on the numerical relationship between the current speed and the preset first ideal speed" specifically includes:

[0038] Determining whether the current rotation speed is greater than or equal to a preset multiple of the first ideal rotation speed;

[0039] If not, the speed of the fan is not increased and the current value of the fan is kept unchanged;

[0040] If so, the fan is operated to increase its speed.

[0041] The preset multiple is denoted as x. If V 实1 <V 0*(1+x) indicates that the fan is subject to less resistance at this time, so the fan current can be kept unchanged (that is, the fan is operated under constant current), and the exhaust gas emissions at this time meet the national standard requirements;

[0042] If V 实1 ≥V 0 *(1+x), indicating that the fan is subject to greater resistance at this time, so the fan speed needs to be increased to improve the degree of complete combustion, reduce exhaust emissions, and ensure that the water heater can work normally. Among them, x is pre-set, and the value range of x is x>0. It should be noted that the actual size of x can be set, and the value of x is not specifically limited here. The first ideal speed V 0 It refers to the fan speed corresponding to a given current when the external wind pressure is 0. The first ideal speed V 0 is pre-configured and stored in the main controller of the water heater. The first ideal speed V 0 It can be 3000r / min or other speed values. The first ideal speed V 0 The value of is specified.

[0043] Furthermore, the above step of “increasing the speed of the fan” specifically includes:

[0044] The current rotation speed of the fan is increased to the second ideal rotation speed.

[0045] The current speed of the fan can be increased to the second ideal speed (denoted as V 1 ), the second ideal speed V 1 It is also pre-configured and stored in the main controller of the water heater. The second ideal speed V 1 It can be 4000r / min or other speed values. The second ideal speed V 1 The value of is specified.

[0046] After the fan speed is increased, the external wind pressure may be constantly changing, which may cause the fan speed to change after the speed increase operation. Therefore, it is necessary to obtain the actual speed of the fan after the speed increase operation (denoted as V 实2 ), to determine the actual speed V of the fan 实2 Whether the working requirements of the water heater can be met, for example, it can be determined whether to adjust the current value of the fan according to the difference between the actual speed and the preset second ideal speed, so as to further control the speed of the fan.

[0047] Specifically, the above step of “determining whether to adjust the current value of the fan based on the difference between the actual speed and the preset second ideal speed” specifically includes:

[0048] Judge whether the absolute value of the difference between the actual rotational speed and the second ideal rotational speed is greater than or equal to a second preset value;

[0049] If not, do not adjust the current value of the blower;

[0050] If so, adjust the current value of the blower according to the magnitude relationship between the actual rotational speed and the second ideal rotational speed.

[0051] If the actual rotational speed V 实2 and the second ideal rotational speed V 1 the absolute value of the difference is less than the second preset value (denoted as y), that is, |V 实2 -V 1 |<y, it indicates that the deviation between the actual rotational speed V 实2 and the second ideal rotational speed V 1 is small. Operating the blower at the actual rotational speed V 实2 can meet the working requirements of the water heater. At this time, the current of the blower can be kept unchanged (that is, the blower is operated under constant current control at this time). The value of y can be 200 r / min. It should be noted that the actual magnitude of y can be set, and the value of y is not specifically limited here;

[0052] If the absolute value of the difference between the actual rotational speed V 实2 and the second ideal rotational speed V 1 is greater than or equal to the second preset value y, that is, |V 实2 -V 1 |≥y, it indicates that the deviation between the actual rotational speed V 实2 and the second ideal rotational speed V 1 is large. At this time, it is necessary to increase or decrease the current value of the blower according to the magnitude relationship between the actual rotational speed V 实2 and the second ideal rotational speed V 1 . As Figure 2 shown, it is a schematic diagram of the relationship between the blower rotational speed and the external wind pressure in the embodiment of the present application. P 0 is the minimum wind pressure 0, P m is the maximum wind pressure, P 0 and P m are values set after testing.

[0053] Further, the step of "adjusting the current value of the blower according to the magnitude relationship between the actual rotational speed and the second ideal rotational speed" includes:

[0054] If the actual rotational speed is greater than the second ideal rotational speed, increase the current value of the blower;

[0055] If the actual rotational speed is less than or equal to the second ideal rotational speed, decrease the current value of the blower.

[0056] If the actual rotational speed V实2 Greater than the second ideal speed V 1 Speed, that is, V 实2 -V 1 >0, increase the fan current, for example, by 0.2A. 实2 Less than or equal to the second ideal speed V 1 , that is, V 实2 -V 1 ≤0, then reduce the fan current value to reduce noise. Increasing or decreasing the fan current according to the change of external wind pressure can increase or decrease the fan speed to ensure the normal operation of the water heater, thereby improving the fan's ability to resist wind pressure.

[0057] In one embodiment, the step of “controlling the fan according to the rotation speed after adjusting the fan current value” specifically includes:

[0058] Determine whether the speed of the fan corresponding to the increased current value is greater than or equal to the maximum limited speed of the fan;

[0059] If so, control the water heater to stop working;

[0060] If not, the speed of the fan corresponding to the increased current value is used as the actual speed, and the step of determining whether to adjust the current value of the fan is re-executed.

[0061] If the speed of the fan corresponding to the increased current value is greater than or equal to the maximum speed limit of the fan (denoted as V m ), if the water heater continues to run at this time, flashback and incomplete combustion will occur, so the water heater can be controlled to stop working. If the corresponding speed of the fan after increasing the current value is less than the maximum speed limit V m , then the speed of the fan corresponding to the increased current value is taken as the actual speed V 实2 , and re-execute the above step of "determining whether to adjust the current value of the fan based on the difference between the actual speed and the preset second ideal speed" so that the speed of the fan is infinitely close to the maximum speed limit V of the fan. m , in order to improve the wind resistance of the fan.

[0062] In one embodiment, the step of “controlling the fan according to the rotation speed after adjusting the fan current value” specifically includes:

[0063] The speed of the fan corresponding to the current value being reduced is taken as the current speed, and the step of determining whether to increase the speed of the fan is re-executed.

[0064] Due to the reduction, the speed of the fan corresponding to the reduced current value is taken as the current speed V 实1, and re-execute the above step of "determining whether to increase the speed of the fan based on the numerical relationship between the current speed and the preset first ideal speed", so as to control the fan in real time according to the speed of the fan and realize adaptive adjustment of the fan.

[0065] This application obtains the current speed of the fan in real time, and based on the numerical relationship between the current speed and the first ideal speed, if it is determined that the fan needs to be increased in speed, the actual speed after the fan is increased in speed is obtained in real time, and based on the difference between the actual speed and the second ideal speed, it is determined whether to adjust the current value of the fan, and if the current value of the fan is adjusted, the fan is operated according to the speed after the current value of the fan is adjusted. When the fan of the water heater is subjected to a relatively small external wind pressure, the fan speed does not need to be increased, and no greater noise is generated at this time, which improves the user experience. At the same time, the exhaust gas emissions meet the standards and reduce the false alarm state of the water heater. When the water heater encounters a relatively large external wind pressure, the fan speed can be adjusted to improve the combustion state of the gas, ensure the fan's high wind pressure resistance, and thus achieve adaptive adjustment of the fan.

[0066] Reference Figure 3 , which is a schematic diagram of the functional modules of the DC fan control device 100 of the water heater of the present application.

[0067] The DC fan control device 100 of the water heater described in the present application can be installed in the water heater. According to the functions to be implemented, the DC fan control device 100 of the water heater may include a first acquisition module 110, a first judgment module 120, a second acquisition module 130, a second judgment module 140 and a control module 150. The module described in the present application may also be referred to as a unit, which refers to a series of computer program segments that can be executed by an electronic device processor and can complete fixed functions, which are stored in the memory of the electronic device.

[0068] In this embodiment, the functions of each module / unit are as follows:

[0069] The first acquisition module 110 is used to acquire the current rotation speed of the fan in real time;

[0070] The first judgment module 120 is used to judge whether to increase the speed of the fan based on the numerical relationship between the current speed and the preset first ideal speed;

[0071] The second acquisition module 130 is used for acquiring in real time the actual speed of the fan after the speed-increasing operation is performed on the fan;

[0072] The second judgment module 140 is used to judge whether to adjust the current value of the fan based on the difference between the actual rotation speed and the preset second ideal rotation speed;

[0073] The control module 150 is used to control the fan according to the rotation speed after the current value of the fan is adjusted.

[0074] In one embodiment, the determining whether to increase the speed of the fan based on the numerical relationship between the current speed and a preset first ideal speed includes:

[0075] Determining whether the current rotation speed is greater than or equal to a preset multiple of the first ideal rotation speed;

[0076] If not, the speed of the fan is not increased and the current value of the fan is kept unchanged;

[0077] If so, the fan is operated to increase its speed.

[0078] In one embodiment, the step of increasing the speed of the fan includes:

[0079] The current rotation speed of the fan is increased to the second ideal rotation speed.

[0080] In one embodiment, judging whether to adjust the current value of the fan based on the difference between the actual speed and the preset second ideal speed includes:

[0081] Determining whether an absolute value of a difference between the actual rotational speed and the second ideal rotational speed is greater than or equal to a second preset value;

[0082] If not, the current value of the fan is not adjusted;

[0083] If so, the current value of the fan is adjusted according to the magnitude relationship between the actual rotation speed and the second ideal rotation speed.

[0084] In one embodiment, adjusting the current value of the fan according to the magnitude relationship between the actual speed and the second ideal speed includes:

[0085] If the actual speed is greater than the second ideal speed, increasing the current value of the fan;

[0086] If the actual rotation speed is less than or equal to the second ideal rotation speed, the current value of the fan is reduced.

[0087] In one embodiment, controlling the fan according to the rotational speed after adjusting the fan current value includes:

[0088] Determine whether the speed of the fan corresponding to the increased current value is greater than or equal to the maximum limited speed of the fan;

[0089] If so, control the water heater to stop working;

[0090] If not, the speed of the fan corresponding to the increased current value is used as the actual speed, and the step of determining whether to adjust the current value of the fan is re-executed.

[0091] In one embodiment, controlling the fan according to the rotational speed after adjusting the fan current value includes:

[0092] The speed of the fan corresponding to the current value being reduced is taken as the current speed, and the step of determining whether to increase the speed of the fan is re-executed.

[0093] Reference Figure 4 , which is a schematic diagram of a preferred embodiment of the water heater of the present application.

[0094] The water heater includes a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112 and the memory 113 communicate with each other via the communication bus 114;

[0095] The memory 113 is used to store programs, for example, a DC fan control program of a water heater;

[0096] In some embodiments, the processor 111 may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chip. The processor 111 is generally used to control the overall operation of the water heater, such as performing control and processing related to data interaction or communication. In this embodiment, the processor 111 is used to run the program code or process data stored in the memory 113, such as running the program code of the DC fan control program of the water heater.

[0097] The communication interface 112 may optionally include a standard wired interface, a wireless interface (such as a WI-FI interface), and the communication interface 112 may also be used to establish a communication connection between the water heater and other water heaters.

[0098] The memory 113 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, disk, optical disk, etc. In some embodiments, the memory 113 can be an internal storage unit of the water heater, such as a hard disk or memory of the water heater. In other embodiments, the memory 113 can also be an external storage device of the water heater, such as a plug-in hard disk equipped with the water heater, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. Of course, the memory 113 can also include both the internal storage unit of the water heater and its external storage device. In this embodiment, the memory 113 is generally used to store the operating system and various programs installed on the water heater, such as the program code of the DC fan control program of the water heater. In addition, the memory 113 can also be used to temporarily store various types of data that have been output or are to be output.

[0099] Figure 4 Only a water heater having components 111 - 114 is shown, but it should be understood that implementation of all of the components shown is not a requirement, and more or fewer components may alternatively be implemented.

[0100] In one embodiment of the present application, the processor 111 is used to execute the program stored in the memory 113 to implement the DC fan control method of the water heater provided by any of the above method embodiments, including:

[0101] Get the current speed of the fan in real time;

[0102] Based on the numerical relationship between the current rotation speed and a preset first ideal rotation speed, determining whether to increase the rotation speed of the fan;

[0103] If yes, obtaining in real time the actual speed of the fan after performing the speed increase operation;

[0104] Based on the difference between the actual rotation speed and a preset second ideal rotation speed, determining whether to adjust the current value of the fan;

[0105] If so, the fan is controlled according to the rotational speed after adjusting the fan current value.

[0106] For a detailed description of the above steps, please refer to the above Figure 1 Description of a flow chart of an embodiment of a method for controlling a DC fan of a water heater.

[0107] In addition, the embodiment of the present application also proposes a computer-readable storage medium, which may be non-volatile or volatile. The computer-readable storage medium includes a data storage area and a program storage area, and the program storage area stores a DC fan control program of the water heater. When the DC fan control program of the water heater is executed by the processor, the following operations are implemented:

[0108] Get the current speed of the fan in real time;

[0109] Based on the numerical relationship between the current rotation speed and a preset first ideal rotation speed, determining whether to increase the rotation speed of the fan;

[0110] If yes, obtaining in real time the actual speed of the fan after performing the speed increase operation;

[0111] Based on the difference between the actual rotation speed and a preset second ideal rotation speed, determining whether to adjust the current value of the fan;

[0112] If so, the fan is controlled according to the rotational speed after adjusting the fan current value.

[0113] The specific implementation of the computer-readable storage medium of the present application is substantially the same as the specific implementation of the DC fan control method of the above-mentioned water heater, and will not be described in detail here.

[0114] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0115] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0116] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0117] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0118] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A DC fan control method for a water heater, characterized in that: The method comprises: Get the current speed of the fan in real time; Based on the numerical relationship between the current rotation speed and a preset first ideal rotation speed, determining whether to increase the rotation speed of the fan; If yes, obtaining in real time the actual speed of the fan after performing the speed increase operation; Based on the difference between the actual rotation speed and a preset second ideal rotation speed, determining whether to adjust the current value of the fan; If so, the fan is controlled according to the rotational speed after adjusting the fan current value.

2. The DC fan control method of a water heater according to claim 1, characterized in that: The step of judging whether to increase the speed of the fan based on the numerical relationship between the current speed and the preset first ideal speed includes: Determining whether the current rotation speed is greater than or equal to a preset multiple of the first ideal rotation speed; If not, the speed of the fan is not increased and the current value of the fan is kept unchanged; If so, the fan is operated to increase its speed.

3. The DC fan control method of a water heater as claimed in claim 2, characterized in that: The step of increasing the rotation speed of the fan comprises: The current rotation speed of the fan is increased to the second ideal rotation speed.

4. The DC fan control method of a water heater according to claim 1, characterized in that: The determining whether to adjust the current value of the fan based on the difference between the actual rotation speed and the preset second ideal rotation speed includes: Determining whether an absolute value of a difference between the actual rotational speed and the second ideal rotational speed is greater than or equal to a second preset value; If not, the current value of the fan is not adjusted; If so, the current value of the fan is adjusted according to the magnitude relationship between the actual rotation speed and the second ideal rotation speed.

5. The DC fan control method of a water heater as claimed in claim 4, characterized in that: The adjusting the current value of the fan according to the magnitude relationship between the actual speed and the second ideal speed includes: If the actual speed is greater than the second ideal speed, increasing the current value of the fan; If the actual rotation speed is less than or equal to the second ideal rotation speed, the current value of the fan is reduced.

6. The DC fan control method of a water heater as claimed in claim 5, characterized in that: The controlling the fan according to the rotation speed after adjusting the fan current value comprises: Determine whether the speed of the fan corresponding to the increased current value is greater than or equal to the maximum limited speed of the fan; If so, control the water heater to stop working; If not, the speed of the fan corresponding to the increased current value is used as the actual speed, and the step of determining whether to adjust the current value of the fan is re-executed.

7. The DC fan control method of a water heater as claimed in claim 5, characterized in that: The controlling the fan according to the rotation speed after adjusting the fan current value comprises: The speed of the fan corresponding to the current value being reduced is taken as the current speed, and the step of determining whether to increase the speed of the fan is re-executed.

8. A DC fan control device for a water heater, characterized in that: The device comprises a module for executing the DC fan control method of the water heater according to any one of claims 1 to 7.

9. A water heater, characterized in that: The water heater further comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; Memory, used to store programs; The processor is used to implement the DC fan control method of the water heater according to any one of claims 1 to 7 when executing the program stored in the memory.

10. A computer-readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, a DC fan control method for a water heater according to any one of claims 1 to 7 is implemented.

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