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

Abstract

The application relates to a direct-current fan control method of a water heater, the water heater and a storage medium. The method comprises the following steps: acquiring a current rotating speed of a fan in real time; if it is judged that the rotating speed of the fan needs to be increased, acquiring an actual rotating speed of the fan after the rotating speed of the fan is increased in real time based on the numerical relation between the current rotating speed and a first ideal rotating speed; judging whether the current value of the fan needs to be adjusted based on the difference relation between the actual rotating speed and a second ideal rotating speed; if the current value of the fan needs to be adjusted, operating the fan according to the rotating speed after the current value of the fan is adjusted. When the fan of the water heater is subjected to small external wind pressure, no greater noise is generated, and the user experience is improved. When the water heater is subjected to large external wind pressure, the rotating speed of the fan can be adjusted to improve the combustion state of gas, ensure the high wind pressure resistance of the fan, and realize self-adaptive adjustment of the fan.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water heaters, and particularly relates to a direct-current fan control method of a water heater, a water heater and a storage medium. BACKGROUND

[0002] At present, gas water heaters on the market have AC fans and DC fans. The wind pressure resistance of the AC fan is relatively weak, and the control scheme of the DC fan is mainly to linearly increase the fan power according to the size of the external wind pressure until a fault is reported. However, when the external wind pressure increases and the fan speed increases, a large noise is caused, thereby affecting the user experience, and even a false fault is reported in the working state of the water heater. If the fan speed is not increased, the combustion state of the gas cannot be improved, and the wind pressure resistance of the fan cannot be guaranteed.

[0003] Therefore, how to control the DC fan of the gas water heater to guarantee the wind pressure resistance of the fan and as far as possible reduce the generation of noise has become a technical problem to be solved by those skilled in the art. SUMMARY

[0004] In view of the above, the present application provides a direct-current fan control method of a water heater, a water heater and a storage medium, which aims to solve the above technical problems.

[0005] In a first aspect, the present application provides a direct-current fan control method of a water heater, which comprises:

[0006] real-time acquisition of a current speed of the fan;

[0007] determination of whether to perform a speed increase operation on the fan based on a numerical relationship between the current speed and a preset first ideal speed;

[0008] if yes, real-time acquisition of an actual speed of the fan after the speed increase operation is performed on the fan;

[0009] determination of whether to adjust a current value of the fan based on a difference relationship between the actual speed and a preset second ideal speed;

[0010] if yes, control of the fan according to the speed after the current value of the fan is adjusted.

[0011] In a second aspect, the present application provides a direct-current fan control device of a water heater, which comprises a unit for executing the direct-current fan control method of the water heater according to any one of the embodiments in the first aspect.

[0012] In a third aspect, the present application provides a water heater, which further comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus.

[0013] a memory for storing a program;

[0014] a processor for implementing the water heater direct-current fan control method of any one of the first aspect when executing the program stored on the memory.

[0015] A fourth aspect provides a computer-readable storage medium having a program stored thereon, the program being executed by a processor to implement the water heater direct-current fan control method of any one of the first aspect.

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

[0017] The present 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 speed of the fan needs to be increased, the actual speed of the fan after the speed increasing operation is obtained in real time, and based on the difference relationship between the actual speed and the second ideal speed, it is determined whether to adjust the current value of the fan. 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 small external wind pressure, the speed of the fan can not be increased, at this time, no more noise is generated, the user experience is improved, at the same time, the waste gas emission meets the standard, and the false alarm state of the water heater is reduced. When the water heater encounters large external wind pressure, the speed of the fan can be adjusted to improve the combustion state of the gas and ensure the high wind pressure resistance of the fan, so as to realize the self-adaptive adjustment of the fan. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0020] One or more embodiments are exemplarily illustrated by pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings in the drawings do not constitute a proportional limitation.

[0021] Figure 1 Flowchart of the water heater direct-current fan control method embodiment of the present application;

[0022] Figure 2 Fig. 7 is a schematic diagram of the relationship between the fan speed and the external wind pressure in an embodiment of the present application;

[0023] Figure 3 Fig. 8 is a schematic diagram of the modules of the direct-current fan control method and device of the water heater in an embodiment of the present application;

[0024] Figure 4 Fig. 9 is a schematic diagram of the water heater in an embodiment of the present application;

[0025] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of 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 of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0027] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the components and arrangements of the examples, which are depicted in the following disclosure, are shown as being in electrical communication or mechanical communication with one another. It, however, is to be understood that many of the components and arrangements can be implemented in various ways without departing from their intended purposes. Furthermore, the described examples can be implemented in different embodiments and of the present application and that the disclosed examples are not meant to limit the scope of the present application to the specific embodiments presented in the description below.

[0028] The present application provides a direct-current fan control method of a water heater. Referring to Fig. 8, it is a method flowchart of an embodiment of the direct-current fan control method of the water heater in the present application. The method can be executed by an electronic device (for example, a water heater), which can be implemented by software and / or hardware. The method comprises the following steps. Figure 1

[0029] Step S10: Real-time acquisition of the current speed of the fan;

[0030] Step S20: Based on the numerical relationship between the current speed and the preset first ideal speed, judgment of whether to execute the speed-up operation on the fan;

[0031] Step S30: If yes, real-time acquisition of the actual speed after the speed-up operation is executed on the fan;

[0032] Step S40: Based on the difference relationship between the actual speed and the preset second ideal speed, judgment of whether to adjust the current value of the fan; ​

[0033] Step S50: If yes, the fan is controlled according to the 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, and the exhaust gas generated after gas combustion is also discharged through the fan, thereby improving the combustion efficiency, reducing the consumption of gas, and reducing the emission of harmful gas. The scheme of the present application is described taking the DC fan as an example.

[0035] During the operation of the DC fan of the gas water heater, the fan may be affected by external environment (for example, wind pressure generated by external natural wind), and the fan may be blocked. Due to the characteristics of the DC fan, when the current provided to the fan is constant, if the external wind pressure becomes larger or the fan is blocked, the load of the fan at this time will become smaller (that is, the work of the fan on the gas water heater will become smaller), and the speed of the fan will increase, thereby causing large noise and affecting user experience. Therefore, 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 of the water heater, improve the user experience, and reduce the false fault phenomenon of wind pressure resistance.

[0036] Specifically, after the fan is started, the current speed (denoted as V 实1 of the fan is obtained in real time. Since the fan may be affected by external wind pressure during operation, the work of the fan on the gas water heater may become smaller. Therefore, it is necessary to determine whether to perform the operation of increasing the speed of the fan according to the numerical relationship between the current speed and the first ideal speed (denoted as V0). For example, if the current speed is much smaller than the first ideal speed, it indicates that the resistance of the fan is small at this time, and the speed of the fan does not need to be increased. If the current speed is much larger than the first ideal speed, it indicates that the resistance of the fan is large at this time, and the speed of the fan needs to be increased.

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

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

[0039] If no, the speed of the fan is not increased and the current value of the fan is kept unchanged.

[0040] If yes, the operation of increasing the speed of the fan is performed.

[0041] The preset multiple is denoted as x, and if V 实1V0*(1+x), which indicates that the fan is subjected to a smaller resistance at this time, and thus the current of the fan can be kept unchanged (i.e., the fan is operated in a constant current control mode at this time), and the exhaust emission at this time meets the national standard requirements;

[0042] If V 实1 ≥V0*(1+x), which indicates that the fan is subjected to a larger resistance at this time, and thus the rotational speed of the fan needs to be increased to V0*(1+x) to improve the combustion completeness and reduce the exhaust emission, and to ensure that the water heater can work normally. It should be noted that the actual value of x can be set, and the value of x is not specifically limited herein. The first ideal rotational speed V0 refers to the rotational speed of the fan corresponding to a given current when the external wind pressure is 0, and the first ideal rotational speed V0 is pre-configured and stored in the main controller of the water heater. The first ideal rotational speed V0 can be 3000 r / min, or can be other rotational speed values, and the value of the first ideal rotational speed V0 is not specifically limited herein.

[0043] Further, the step of "performing the rotational speed increasing operation on the fan" specifically includes:

[0044] increasing the current rotational speed of the fan to the second ideal rotational speed.

[0045] The current rotational speed of the fan can be increased to the second ideal rotational speed (denoted as V1), and the second ideal rotational speed V1 is also pre-configured and stored in the main controller of the water heater. The second ideal rotational speed V1 can be 4000 r / min, or can be other rotational speed values, and the value of the second ideal rotational speed V1 is not specifically limited herein.

[0046] After performing the rotational speed increasing operation on the fan, the rotational speed of the fan after the rotational speed increasing operation can also change due to the change of the external wind pressure. Therefore, the actual rotational speed (denoted as V 实2 ) of the fan after the rotational speed increasing operation needs to be obtained in real time to determine whether the actual rotational speed V 实2 of the fan meets the working requirements of the water heater, for example, whether the current value of the fan is adjusted according to the difference between the actual rotational speed and the pre-set second ideal rotational speed, so as to further control the rotational speed of the fan.

[0047] Specifically, the step of "determining whether to adjust the current value of the fan based on the difference between the actual rotational speed and the pre-set second ideal rotational speed" specifically includes:

[0048] determining 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 pre-set value;

[0049] If not, the current value of the fan is not adjusted;

[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 The absolute value of the difference from the second ideal rotational speed V1 is less than the second preset value (denoted as y), that is, |V 实2 - V1| < y, indicating that the actual rotational speed V 实2 The deviation from the second ideal rotational speed V1 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 controlled to operate at a constant current 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 actual rotational speed V 实2 The absolute value of the difference from the second ideal rotational speed V1 is greater than or equal to the second preset value y, that is, |V 实2 - V1| ≥ y, indicating that the actual rotational speed V 实2 The deviation from the second ideal rotational speed V1 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 V1. As Figure 2 Shown, is a schematic diagram of the relationship between the blower rotational speed and the external wind pressure in an embodiment of the present application. P0 is the minimum wind pressure of 0, P m Is the maximum wind pressure, and P0 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 <00000​​​​​​​​

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

[0058] determining 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 yes, controlling the water heater to stop working;

[0060] if no, taking the speed of the fan corresponding to the increased current value as the actual speed, and re-executing the step of determining whether to adjust the current value of the fan.

[0061] If the speed of the fan corresponding to the increased current value is greater than or equal to the maximum limited speed of the fan (denoted as V m If the water heater continues to run at this time, it will cause backfire, incomplete combustion, etc., so the water heater can be controlled to stop working. If the speed of the fan corresponding to the increased current value is less than the maximum limited speed V m , the speed of the fan corresponding to the increased current value is taken as the actual speed V 实2 , and the 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" is re-executed, so that the speed of the fan approaches the maximum limited speed V m of the fan infinitely, so as to improve the wind resistance of the fan.

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

[0063] taking the speed of the fan corresponding to the reduced current value as the current speed, and re-executing the step of determining whether to perform the speed increasing operation on the fan.

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

[0065] The 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 judged that the speed of the fan needs to be increased, the actual speed of the fan after the speed increasing operation is obtained in real time, and based on the difference relationship between the actual speed and the second ideal speed, it is judged 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 small external wind pressure, the fan speed can not be increased, at this time, no more noise is generated, the user experience is improved, and the waste gas emission meets the standard, reducing the false alarm state of the water heater. When the water heater encounters large external wind pressure, the speed of the fan can be adjusted to improve the combustion state of the gas and ensure the high wind pressure resistance of the fan, thereby realizing the self-adaptive adjustment of the fan.

[0066] Referring to Figure 3 Fig. 1 is a schematic diagram of the function modules of the direct-current fan control device 100 of the water heater of the application.

[0067] The direct-current fan control device 100 of the water heater of the application can be installed in the water heater. According to the functions to be realized, the direct-current fan control device 100 of the water heater can include a first obtaining module 110, a first judging module 120, a second obtaining module 130, a second judging module 140, and a control module 150. The modules of the application can also be referred to as units, which refer 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 the embodiment, the functions of the modules / units are as follows:

[0069] The first obtaining module 110 is used to obtain the current speed of the fan in real time.

[0070] The first judging 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 obtaining module 130 is used to obtain the actual speed of the fan after the speed increasing operation is performed on the fan in real time if the speed increasing operation is performed on the fan.

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

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

[0074] In one embodiment, the step of determining whether to perform the speed-up operation on the fan based on the numerical relationship between the current speed and the first preset ideal speed comprises:

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

[0076] if not, not increasing the speed of the fan and keeping the current value of the electric current unchanged;

[0077] if yes, performing the speed-up operation on the fan.

[0078] In one embodiment, the step of performing the speed-up operation on the fan comprises:

[0079] increasing the current speed of the fan to the second ideal speed.

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

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

[0082] if not, not adjusting the electric current value of the fan;

[0083] if yes, adjusting the electric current value of the fan according to the size relationship between the actual speed and the second ideal speed.

[0084] In one embodiment, the step of adjusting the electric current value of the fan according to the size relationship between the actual speed and the second ideal speed comprises:

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

[0086] if the actual speed is less than or equal to the second ideal speed, decreasing the electric current value of the fan.

[0087] In one embodiment, the step of controlling the fan according to the speed after adjusting the electric current value of the fan comprises:

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

[0089] if yes, controlling the water heater to stop working;

[0090] if not, taking the speed corresponding to the increased electric current value as the actual speed, and re-executing the step of determining whether to adjust the electric current value of the fan.

[0091] In one embodiment, the controlling the fan according to the rotating speed after the adjustment of the fan current value comprises:

[0092] The rotating speed corresponding to the fan after the reduction of the current value is taken as the current rotating speed, and the step of judging whether to perform the rotating speed increasing operation on the fan is re-executed.

[0093] Referring to Figure 4 FIG. 1 shows a schematic diagram of a preferred embodiment of the water heater.

[0094] The water heater comprises 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 complete mutual communication through the communication bus 114.

[0095] The memory 113 is configured to store programs, for example, a direct-current fan control program of the water heater.

[0096] In some embodiments, the processor 111 can 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, for example, to perform control and processing related to data interaction or communication. In this embodiment, the processor 111 is configured to run program codes or process data stored in the memory 113, for example, to run program codes of the direct-current fan control program of the water heater.

[0097] The communication interface 112 can optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The communication interface 112 can 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, such as a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., an SD or DX memory, etc.), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an 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 a 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, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped with the water heater. Of course, the memory 113 can also include both the internal storage unit and the external storage device of the water heater. In the present embodiment, the memory 113 is generally used to store an operating system and various programs installed in the water heater, such as program codes of a direct-current fan control program of the water heater, etc. In addition, the memory 113 can also be used to temporarily store various data that have been output or will be output.

[0099] Figure 4 Only the water heater with components 111-114 is shown, but it should be understood that all of the shown components are not required to be implemented, and more or fewer components can be alternatively implemented.

[0100] In one embodiment of the present application, the processor 111, when executing the programs stored in the memory 113, implements the direct-current fan control method of the water heater provided by any one of the method embodiments described above, including:

[0101] obtaining a current rotating speed of the fan in real time;

[0102] determining whether to perform a rotating speed increasing operation on the fan based on a numerical relationship between the current rotating speed and a preset first ideal rotating speed;

[0103] if yes, obtaining an actual rotating speed of the fan after the rotating speed increasing operation is performed on the fan in real time;

[0104] determining whether to adjust a current value of the fan based on a difference relationship between the actual rotating speed and a preset second ideal rotating speed;

[0105] if yes, controlling the fan according to the rotating speed after the current value of the fan is adjusted.

[0106] For detailed descriptions of the above steps, please refer to the above Figure 1 For a flowchart of the direct-current fan control method embodiment of the water heater.

[0107] In addition, the embodiment of the present application further provides a computer readable storage medium. The computer readable storage medium can be nonvolatile or volatile. The computer readable storage medium comprises a storage data area and a storage program area. The storage program area stores a direct-current fan control program of a water heater. When the direct-current fan control program of the water heater is executed by a processor, the following operations are realized.

[0108] Real-time acquisition of a current rotating speed of the fan;

[0109] Based on a numerical relationship between the current rotating speed and a preset first ideal rotating speed, it is judged whether to execute a rotating speed increasing operation on the fan;

[0110] If yes, an actual rotating speed of the fan after the rotating speed increasing operation is executed on the fan is acquired in real time;

[0111] Based on a difference relationship between the actual rotating speed and a preset second ideal rotating speed, it is judged whether to adjust a current value of the fan;

[0112] If yes, the fan is controlled according to the rotating speed after the current value of the fan is adjusted.

[0113] The specific implementation of the computer readable storage medium of the present application is basically the same as that of the direct-current fan control method of the water heater, and will not be described here.

[0114] The apparatus embodiments described above are only schematic, wherein the units illustrated as separate components can or can not be physically separate, and the components illustrated as units can or can not be physical units, i.e., can be located in one place or distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment.

[0115] From the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software plus a general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions essentially or in other words the part that contributes to the related art can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0116] It should be noted that the terms "first", "second", and the like, used in the description and in the claims of this application are only used for distinguishing between similar elements and do not convey any qualitative meaning or importance. Thus, the terms "first", "second", and the like, are used in the description and the claims of this application merely to distinguish between similar elements, and are not used to indicate or imply that a qualitative difference between the elements exists. Thus, these terms are used in the description and the claims of this application arbitrarily. It is also to be noted that the term "comprising" is used in the accompanying description and in the claims of the application to mean that the described and claimed features, steps and / or elements are included. However, the use of the term "comprising" does not exclude the presence of elements, steps, and / or features other than the ones described and claimed. The term "comprising" therefore means "including, but not limited to".

[0117] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular articles "a", "an" and "the" can be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "including", and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0118] The above description is that of current embodiments of the application. Various modifications and changes can be made thereto without departing from the spirit and scope of the application as set forth. The disclosed embodiments are illustrative of the application and are not meant to limit the same to the exact construction described. The various embodiments are not to be construed as limiting the scope of the application, which is defined by the appended claims.

Claims

1. A method for controlling a DC fan in a water heater, characterized in that, The method includes: Real-time acquisition of the current speed of the fan; Based on the numerical relationship between the current rotational speed and the preset first ideal rotational speed, it is determined whether to perform a speed increase operation on the fan. If so, the actual rotational speed of the fan after the speed increase operation is performed is obtained in real time; Based on the difference between the actual rotational speed and the preset second ideal rotational speed, it is determined whether to adjust the current value of the fan. If so, the fan speed is controlled according to the adjusted fan current value; The step of determining whether to adjust the fan current value based on the difference between the actual rotational speed and the preset second ideal rotational speed includes: Determine 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; If not, do not adjust the current value of the fan; If so, adjust the current value of the fan according to the relationship between the actual rotation speed and the second ideal rotation speed; The step of adjusting the current value of the fan based on the relationship between the actual rotational speed and the second ideal rotational speed includes: If the actual rotational speed is greater than the second ideal rotational speed, increase the current value of the fan; If the actual rotational speed is less than or equal to the second ideal rotational speed, reduce the current value of the fan.

2. The DC fan control method for a water heater as described in claim 1, characterized in that, The step of 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: Determine whether the current rotational speed is greater than or equal to a preset multiple of the first ideal rotational speed; If not, do not increase the speed of the fan and keep the current value of the fan constant; If so, the fan speed is increased.

3. The DC fan control method for a water heater as described in claim 2, characterized in that, The operation of increasing the speed of the fan includes: Increase the current speed of the fan to the second ideal speed.

4. The DC fan control method for a water heater as described in claim 1, characterized in that, The step of controlling the fan speed based on the adjusted fan current value includes: Determine whether the fan speed after increasing the 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 actual rotational speed of the fan after increasing the current value will be used as the actual rotational speed, and the step of determining whether to adjust the current value of the fan will be executed again.

5. The DC fan control method for a water heater as described in claim 1, characterized in that, The step of controlling the fan speed based on the adjusted fan current value includes: The current speed of the fan after the current value is reduced is taken as the current speed, and the step of determining whether to increase the speed of the fan is executed again.

6. A DC fan control device for a water heater, characterized in that, The device includes a module that performs the DC fan control method for a water heater as described in any one of claims 1 to 5.

7. A water heater, characterized in that, The water heater also includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store programs; The processor, when executing a program stored in a memory, implements the DC fan control method for the water heater as described in any one of claims 1 to 5.

8. A computer-readable storage medium having a program stored thereon, characterized in that, When the program is executed by the processor, it implements the DC fan control method for the water heater as described in any one of claims 1 to 5.

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