Power-off memory method for washing machine and washing machine

Abstract

The power-off memory method of a washing machine and the washing machine are provided, and the method comprises the following steps: in the case that the washing machine is detected to be powered off, a main control board sets the state of a first power-off identifier, and sends the first power-off identifier to a display board, so that the display board sends target parameters to be stored, and the main control board receives the target parameters sent by the display board and stores the target parameters; in the case that the washing machine is detected to be powered on, the main control board sends the target parameters to the display board, so that the display board loads the target parameters to restore the display state before the power-off. Through the communication between the display board and the main control board, in the case that the washing machine is powered off, the target parameters of the display board are stored in the main control board, and after the washing machine is powered on, the main control board returns the target parameters to the display board, so that the power-off memory of the display board is realized, the problem of the shortage of chip peripheral resources of the display board caused by the design of the memory chip on the display board is avoided, and the purpose of reducing the manufacturing cost of the display board is achieved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of household appliances, in particular to a power-off memory method of a washing machine and the washing machine. BACKGROUND

[0002] Most of the current washing machines have a power-off memory function. In the event of power failure during operation, the current operating parameters can be recorded in the memory chip. When the washing machine is powered on again, the recorded parameters before power failure can be read to restore the operating parameters before power failure, so that the washing machine can continue to operate. With the continuous upgrading of washing machines, the functions of the display panel of the washing machine are becoming more and more complex, such as adding wifi, mode collection and other functions on the display panel, and the parameters on the display panel also have the need for power-off memory.

[0003] In the related art, a memory chip is designed on the display panel, but this way increases the cost of the display panel while solving the power-off memory of the display panel, and occupies the peripheral resources of the chip. SUMMARY

[0004] To overcome the problems in the related art, the present disclosure provides a power-off memory method of a washing machine and the washing machine.

[0005] According to a first aspect of the present disclosure, a power-off memory method of a washing machine is provided, the washing machine comprising a main control panel and a display panel, the method being applied to the main control panel, and the method comprising:

[0006] In response to detecting that the washing machine is powered off, setting a state of a first power-off identifier, and sending the first power-off identifier to the display panel, so that the display panel sends target parameters to be stored, the first power-off identifier being used to instruct the display panel to send target parameters to the main control panel;

[0007] receiving and storing the target parameters sent by the display panel;

[0008] In response to detecting that the washing machine is powered on, sending the target parameters to the display panel, so that the display panel loads the target parameters to restore the display state before power failure.

[0009] In any embodiment, the display panel sends the target parameters to be stored while carrying a second power-off identifier, the second power-off identifier being used to indicate that the display panel has sent all the target parameters to be stored;

[0010] The receiving and storing the target parameters sent by the display panel comprises:

[0011] receiving and storing the target parameters sent by the display panel to a memory chip of the main control panel;

[0012] In response to receiving the second power-off identifier, resetting the first power-off identifier, and setting a state of a third power-off identifier, the third power-off identifier being used to indicate that the target parameters of the display panel are stored before power-off.

[0013] In any embodiment, the memory chip of the master control panel comprises a plurality of storage areas;

[0014] The receiving of the target parameters sent by the display panel and the storing of the target parameters into the memory chip of the master control panel comprises:

[0015] The receiving of the target parameters sent by the display panel and the storing of the target parameters into the memory chip of the master control panel comprises:

[0016] In any embodiment, the method further comprises:

[0017] The sending of the reset first power-off identifier to the display panel so that the display panel resets the second power-off identifier.

[0018] In any embodiment, in response to detecting that the washing machine is powered on, the sending of the target parameters to the display panel so that the display panel loads the target parameters to restore the display state before power-off comprises:

[0019] In response to detecting that the washing machine is powered on and detecting that the state of the third power-off identifier indicates that the target parameters of the display panel are stored before power-off, the obtaining of the target parameters from the memory chip;

[0020] The sending of the target parameters to the display panel so that the display panel loads the target parameters to restore the display state before power-off.

[0021] In any embodiment, the method further comprises:

[0022] In response to receiving the fourth power-off identifier sent by the display panel, resetting the state of the third power-off identifier according to the state of the fourth power-off identifier, the fourth power-off identifier being used to indicate that the display panel has completed loading the target parameters;

[0023] The sending of the reset state of the third power-off identifier to the display panel so that the display panel resets the state of the fourth power-off identifier.

[0024] According to a second aspect of the present disclosure, a power-off memory method of a washing machine is provided, the washing machine comprising a master control panel and a display panel, and the method applied to the display panel, the method comprising:

[0025] In response to receiving the first power-off identifier sent by the master control panel, the sending of target parameters to be stored to the master control panel:

[0026] In response to detecting that the washing machine is powered on, the target parameters sent by the main control board are received, and the target parameters are loaded to restore the display state before power failure.

[0027] In any embodiment, sending the target parameters to be stored to the main control board comprises:

[0028] Setting a state of a second power failure identifier, sending the target parameters to be stored to the main control board and the second power failure identifier, the second power failure identifier being used to indicate that the display board has sent the target parameters to be stored.

[0029] In any embodiment, the method further comprises:

[0030] In response to receiving the first power failure identifier reset by the main control board, the second power failure identifier is reset.

[0031] In any embodiment, the method further comprises:

[0032] After the target parameters are loaded, a state of a fourth power failure identifier is set, and the fourth power failure identifier is sent to the main control board, so that the main control board resets the state of the third power failure identifier, the fourth power failure identifier being used to indicate that the display board has loaded the target parameters;

[0033] In response to receiving the third power failure identifier reset, the state of the fourth power failure identifier is reset.

[0034] In any embodiment, the method further comprises:

[0035] In response to detecting that the washing machine is powered off, the target parameters to be stored on the display board are stored in the flash memory of the display board;

[0036] In response to detecting that the washing machine is powered on, the target parameters are read from the flash memory, and the target parameters are loaded to restore the display state before power failure.

[0037] According to a third aspect of the present disclosure, a washing machine is provided, the washing machine comprising a main control board and a display board;

[0038] The main control board sets a state of a first power failure identifier and sends the first power failure identifier to the display board when detecting that the washing machine is powered off.

[0039] The display board sends target parameters to be stored to the main control board when receiving the first power failure identifier sent by the main control board.

[0040] The main control board receives and stores the target parameters sent by the display board.

[0041] The main control board sends the target parameters to the display board when detecting that the washing machine is powered on.

[0042] The display board receives the target parameters sent by the main control board when detecting that the washing machine is powered on, and loads the target parameters to restore the display state before power failure.

[0043] The technical solution provided by the present disclosure can have the following beneficial effects: the main control board sets the state of the first power failure identifier when detecting that the washing machine is powered off, and sends the first power failure identifier to the display board, so that the display board sends the target parameters to be stored, and the main control board receives the target parameters sent by the display board and stores them; the main control board sends the target parameters to the display board when detecting that the washing machine is powered on, so that the display board loads the target parameters to restore the display state before power failure. Through the communication between the display board and the main control board, the target parameters of the display board are stored in the main control board when the washing machine is powered off, and the target parameters are returned to the display board by the main control board after the washing machine is powered on, so as to realize the power failure memory of the display board, avoid the problem of shortage of chip peripheral resources of the display board caused by designing a memory chip on the display board, and achieve the purposes of simplifying the circuit design of the display board and reducing the manufacturing cost of the display board.

[0044] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, rather than limiting the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0045] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments consistent with the present disclosure and serve to explain the technical solutions of the present disclosure together with the specification.

[0046] Figure 1 is a flowchart of a power failure memory method of a washing machine according to an exemplary embodiment.

[0047] Figure 2 is a schematic diagram of a storage area of a memory chip in a main control board according to an exemplary embodiment.

[0048] Figure 3 is a flowchart of a power failure memory method applied to a main control board according to an exemplary embodiment.

[0049] Figure 4 is a flowchart of a power failure memory method applied to a display board according to an exemplary embodiment. DETAILED DESCRIPTION

[0050] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, like reference numerals refer to like elements throughout the description. The following exemplary embodiments are described in enough detail to enable those skilled in the art to practice the disclosure. Additionally, the description itself is not intended to limit the scope of the disclosure, but is intended to provide exemplary embodiments of apparatus and methods consistent with the disclosure. Other embodiments, which do not depart from the scope of the disclosure, will be apparent to those skilled in the art from consideration of the description or practice of the disclosure as set forth below.

[0051] The terminology used in the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in the description of the disclosure and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0052] It will be understood that, although the terms first, second, third, etc. can be used herein to describe various information, these terms are not intended to denote a temporal or chronological order. Rather, these terms are used only to distinguish one type of information from another. For example, a first information can be termed a second information, and similarly, a second information can also be termed a first information, without departing from the scope of the disclosure. Depending on the context, the word "if' as used herein can be interpreted to mean "when" or "in response to determining".

[0053] Generally, a power-off memory chip is designed on the main control board of the washing machine, and the power-off memory processing of the whole machine is performed. In the process of running, pausing, or reserving, which requires power-off memory, the logic processing of power-off memory is performed. When the power is off, the main control board maintains the work for a short time by using the electric quantity of the self-capacitance, and saves the parameters in the running, pausing, or reserving process in the memory chip. When the power is on, the main control board reads the data from the memory chip for analysis, so as to restore the parameters before the power is off and synchronously display the parameters on the display board.

[0054] However, the power-off memory function can only restore the parameters of the whole machine, and does not include the independent parameters of the display board. At present, in order to realize the power-off storage of the independent parameters of the display board, a memory chip is designed on the display board. However, this method increases the cost of the display board and occupies the peripheral resources of the chip while solving the power-off memory of the display board.

[0055] In view of this, the disclosure provides a power-off memory method of a washing machine. In the case that the washing machine is powered off, the parameters of the display board are stored to the main control board through the communication between the display board and the main control board. After the washing machine is powered on, the main control board returns the stored parameters to the display board, so as to realize the power-off memory of the parameters on the display board.

[0056] The following embodiments will illustrate the power-off memory method provided by the present disclosure in conjunction with the accompanying drawings.

[0057] Figure 1 FIG. 1 is a flowchart of a power-off memory method of a washing machine according to an exemplary embodiment of the present disclosure, which is applied to a main control board, such as Figure 1 As shown in FIG. 1, the power-off memory method includes the following steps 101 to 103.

[0058] In step 101, in response to detecting that the washing machine is powered off, the state of a first power-off identifier is set, and the first power-off identifier is sent to the display panel, so that the display panel sends target parameters to be stored.

[0059] In the case of power-off of the washing machine, the main control board can detect that the main power is powered off. The power-off in the present disclosure includes power-off in any case, such as running, pausing, standby, ending, etc.

[0060] In the case that the main control board detects that the main power is powered off, the state of the first power-off identifier can be set. The first power-off identifier can be used to instruct the display panel to send target parameters to the main control board. For example, the first power-off identifier can be set to 1, indicating that the washing machine is powered off, i.e., the display panel can send target parameters to the main control board.

[0061] The target parameters in the present embodiment refer to parameters independent of the display panel itself, i.e., the target parameters can include any one or a combination of the following: display brightness, sound switch, wifi switch, related parameters in a favorites folder, etc. For example, the related parameters in the favorites folder can include a saved mode.

[0062] In step 102, the target parameters sent by the display panel are received and stored.

[0063] In step 103, in response to detecting that the washing machine is powered on, the target parameters are sent to the display panel, so that the display panel loads the target parameters to restore the display state before power-off.

[0064] In the embodiment, the main control board sets the state of the first power-off identifier when detecting that the washing machine is powered off, sends the first power-off identifier to the display board, and makes the display board send the target parameters to be stored. The main control board receives the target parameters sent by the display board and stores them. When detecting that the washing machine is powered on, the main control board sends the target parameters to the display board, and makes the display board load the target parameters to restore the display state before power-off. Through the communication between the display board and the main control board, the target parameters of the display board are stored in the main control board when the washing machine is powered off, and the target parameters are returned to the display board by the main control board after the washing machine is powered on, so that the power-off memory of the display board is realized, the problem of the shortage of chip peripheral resources of the display board caused by the design of the memory chip on the display board is avoided, the circuit design of the display board is simplified, and the manufacturing cost of the display board is reduced.

[0065] In some embodiments, the target parameters sent by the display board can be stored in the memory chip of the main control board.

[0066] In one embodiment, the memory chip of the main control board can be divided into a plurality of storage areas, and the target parameters sent by the display board are stored in the designated storage area.

[0067] Figure 2 FIG. 1 is a schematic diagram of the storage area of the memory chip in the main control board according to an exemplary embodiment of the present disclosure, as shown in FIG. 1, the memory chip in the main control board can be divided into three storage areas, namely storage area 1, storage area 2 and storage area 3, wherein the storage area 1 is used to store the whole machine power-off memory data, and the storage area 2 is used to store the display board power-off memory data. That is, the target parameters of the display board and the parameters of the main control board can be stored separately to avoid affecting the access demand of the main control board for the whole machine power-off memory data. Figure 2

[0068] In some embodiments, the display board sends the target parameters to be stored with a second power-off identifier, and the second power-off identifier is used to indicate that the display board has sent all the target parameters to be stored. In this case, the receiving the target parameters sent by the display board and storing them can include:

[0069] receiving the target parameters sent by the display board and storing them in the memory chip of the main control board; in response to receiving the second power-off identifier, resetting the first power-off identifier and setting the state of a third power-off identifier, and the third power-off identifier is used to indicate that the target parameters of the display board are stored before power-off.

[0070] In the embodiment, the resetting of the first power-off identifier by the main control board indicates that the main control board has stored the target parameters of the display board.

[0071] ​The resetting of the first power-off identifier can be understood as resetting the state of the first power-off identifier. For example, in the case where the first power-off identifier is set to 1, resetting the first power-off identifier means setting the first power-off identifier to 0.

[0072] In some embodiments, the first power-off identifier after resetting can be sent to the display panel to make the display panel reset the second power-off identifier.

[0073] The master control panel sends the first power-off identifier after resetting to the display panel, which is used to inform the display panel that the master control panel has stored the target parameters sent by the display panel. In the case where the display panel receives the first power-off identifier after resetting, the display panel can reset the second power-off identifier.

[0074] In some embodiments, in response to detecting that the washing machine is powered on, the target parameters are sent to the display panel to make the display panel load the target parameters to restore the display state before power-off, which can include: in response to detecting that the washing machine is powered on and detecting that the state of the third power-off identifier indicates that the target parameters of the display panel are stored before power-off, obtaining the target parameters from the memory chip; sending the target parameters to the display panel to make the display panel load the target parameters to restore the display state before power-off.

[0075] That is, in the case where it is detected that the washing machine is powered on, the state of the third power-off identifier can be detected, and in the case where it is detected that the state of the third power-off identifier indicates that the target parameters of the display panel are stored before power-off, the stored target parameters are obtained from the memory chip of the master control panel.

[0076] For example, in the case where it is detected that the state of the third power-off identifier is 1, it indicates that the target parameters of the display panel are stored before power-off.

[0077] In some embodiments, in response to receiving the fourth power-off identifier sent by the display panel, the state of the third power-off identifier is reset according to the state of the fourth power-off identifier, the fourth power-off identifier is used to indicate that the display panel has completed loading the target parameters; and the state of the third power-off identifier after resetting is sent to the display panel to make the display panel reset the state of the fourth power-off identifier.

[0078] In order to more clearly illustrate the power-off memory method applied to the master control panel, the following embodiments are combined with the accompanying drawings Figure 3 The power-off memory method applied to the master control panel is specifically described. Figure 3 is a flowchart of the power-off memory method applied to the master control panel according to an exemplary embodiment, as shown in Figure 3As shown, the main control board detects whether the washing machine is powered off (301), the main control detects that the washing machine is powered off, sets the first power-off identifier to 1, and sends the first power-off identifier to the display board (302). The target parameter sent by the display board is received (303), and in the case that the second power-off identifier sent by the display board is received by the main control board is 1, the target parameter sent by the display board is parsed, and the target parameter is stored in the memory chip (304).

[0079] That is, in the case that the second power-off identifier is 1, it indicates that the display board has returned the target parameter to the main control board. In this case, the main control board can start to parse the parameters of the power-off memory part of the display board and save them to the memory chip, for example, to the storage area 2 in the memory chip. Figure 2

[0080] After saving, the first power-off identifier is set to 0 and the third power-off identifier is set to 1 (305).

[0081] Detect whether the washing machine is powered on (306), and in the case that the washing machine is detected to be powered on, the main control board judges whether the third power-off identifier is 1. The third power-off identifier is 1, which indicates that the target parameter of the display board is saved last time. Therefore, in the case that the third power-off identifier is 1, the target parameter of the display board stored in the memory chip is read and sent to the display board (307). The fourth power-off identifier is received, and in the case that the fourth power-off identifier is 1, the main control board sets the third power-off identifier to 0 (308). In the case that the fourth power-off identifier is 1, it indicates that the display board has received the target parameter sent by the main control and has completed processing.

[0082] The power-off memory method applied to the display board in the embodiment of the disclosure can include: in response to receiving the first power-off identifier sent by the main control board, sending the target parameter to be stored to the main control board; and in response to detecting that the washing machine is powered on, receiving the target parameter sent by the main control board, and loading the target parameter to restore the display state before power-off.

[0083] In some embodiments, sending the target parameter to be stored to the main control board can include: setting the state of the second power-off identifier, sending the target parameter to be stored and the second power-off identifier to the main control board, and the second power-off identifier is used to indicate that the display board has sent the target parameter to be stored.

[0084] In some embodiments, the method further includes: in response to receiving the first power-off identifier sent by the main control board after reset, resetting the second power-off identifier.

[0085] ​In some embodiments, the method further comprises: after the target parameters are loaded, setting a state of a fourth power-off identifier, and sending the fourth power-off identifier to the master board, so that the master board resets the state of the third power-off identifier, the fourth power-off identifier being used to indicate that the display board has completed loading the target parameters; and in response to receiving the reset third power-off identifier, resetting the state of the fourth power-off identifier.

[0086] To more clearly illustrate the power-off memory method applied to the display board, the following embodiments are combined with the accompanying drawings Figure 4 The power-off memory method applied to the display board is specifically described. Figure 4 is a flowchart of the power-off memory method applied to the display board according to an exemplary embodiment, as shown in the figure Figure 4 As shown, it is detected whether the first power-off identifier sent by the master board is 1 (401), in the case of detecting that the first power-off identifier is 1, the second power-off identifier is set to 1 (402), and the target parameters required by the display board itself for power-off memory and the second power-off identifier are sent to the master board (403).

[0087] It is detected whether the first power-off identifier sent by the master board is 0 (404), in the case of receiving the first power-off identifier sent by the master board is 0, the second power-off identifier can be set to 0 (405). That is, in the case of the first power-off identifier being 0, it indicates that the master board has stored the target parameters.

[0088] It is detected whether the third power-off identifier sent by the master board is 1 (406), in the case of receiving the third power-off identifier sent by the master board is 1, the target parameters sent by the master board are parsed (407) to restore the target parameters of the display board to the display board itself, so as to realize the recovery of the power-off memory of the display board. After recovery, the fourth power-off identifier is set to 1 and sent to the master board (408), and the fourth power-off identifier being 1 indicates that the power-off memory has been recovered. In an implementation manner, the target parameters sent by the master board can be directly received and parsed, that is, the master board can send the target parameters to the display board in the case of detecting that the third power-off identifier is 1, and the display board can receive the target parameters sent by the master board.

[0089] It is detected whether the third power-off identifier sent by the master board is 0 (409), and the third power-off identifier being 0 indicates that the master board receives the fourth power-off identifier sent by the display board and no longer sends the target parameters of the display board. In the case of receiving the third power-off identifier sent by the master board is 0, the fourth power-off identifier is set to 0 (410).

[0090] The target parameters of the display board can also be stored in the flash inside the display board, and the target parameters can be saved and read through a read-write algorithm.

[0091] In the embodiment, storing the target parameters of the display panel in the flash inside the display panel can include: in response to detecting that the washing machine is powered off, storing the target parameters to be stored on the display panel into the flash memory of the display panel; in response to detecting that the washing machine is powered on, reading the target parameters from the flash memory and loading the target parameters to restore the display state before the power-off.

[0092] The disclosure also provides a washing machine, which comprises a main control panel and a display panel.

[0093] The main control panel sets the state of a first power-off identifier and sends the first power-off identifier to the display panel when detecting that the washing machine is powered off.

[0094] The display panel sends the target parameters to be stored to the main control panel when receiving the first power-off identifier sent by the main control panel.

[0095] The main control panel receives and stores the target parameters sent by the display panel.

[0096] The main control panel sends the target parameters to the display panel when detecting that the washing machine is powered on.

[0097] The display panel receives the target parameters sent by the main control panel and loads the target parameters to restore the display state before the power-off when detecting that the washing machine is powered on.

[0098] Generally, the display panel will work with the main control panel for a certain period of time when the washing machine is powered off, so the disclosure uses this period of time to send the target parameters of the display panel to the main control panel for storage, and after the washing machine is powered on, the main control panel returns the stored target parameters to the display panel, thereby realizing the power-off memory of the display panel.

[0099] Generally, the washing machine can perform periodic communication between the display panel and the main control panel when powered on. Considering the timeliness of communication and the efficiency of communication processing, the amount of data for communication can be reduced without affecting the work. However, with the increasing richness of the functions of the washing machine, the number of independent parameters of the display panel is increasing, for example, a washing machine with a touch screen and other functions can have a favorites function and an intelligent recommendation function, etc. These functions involve multiple washing modes and parameters, and the amount of data is large. If the parameters of the display panel are added to the periodic communication data, it will affect the original communication, and therefore, the power-off memory of the display panel can be realized by using the method provided by the disclosure.

[0100] In some embodiments, the main control panel receives and stores the target parameters sent by the display panel to a memory chip of the main control panel.

[0101] The display panel carries a second power-off identifier when sending the target parameter, and the second power-off identifier is used to indicate that the display panel has sent the target parameter to be stored.

[0102] The master control panel resets the first power-off identifier and sets a state of a third power-off identifier when receiving the second power-off identifier, and the third power-off identifier is used to indicate that the target parameter of the display panel is stored before power-off.

[0103] The master control panel sends the reset first power-off identifier to the display panel.

[0104] The display panel resets the second power-off identifier when receiving the reset first power-off identifier sent by the master control panel.

[0105] In some embodiments, the master control panel acquires the target parameter from the memory chip when detecting that the washing machine is powered on and detecting that the state of the third power-off identifier indicates that the target parameter of the display panel is stored before power-off.

[0106] The master control panel sends the target parameter to the display panel.

[0107] The display panel receives and loads the target parameter to restore the display state before power-off.

[0108] The master control panel resets the state of the third power-off identifier according to the state of a fourth power-off identifier when receiving the fourth power-off identifier sent by the display panel, and the fourth power-off identifier is used to indicate that the display panel has completed loading the target parameter.

[0109] The master control panel sends the reset state of the third power-off identifier to the display panel.

[0110] The display panel resets the state of the fourth power-off identifier according to the reset state of the third power-off identifier when receiving the reset third power-off identifier sent by the master control panel to the display panel.

[0111] The above is only a preferred embodiment of one or more embodiments of the disclosure, and does not limit one or more embodiments of the disclosure. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of one or more embodiments of the disclosure should be included in the protection scope of one or more embodiments of the disclosure.

Claims

1. A power down memory method for a laundry machine, characterized in that, The washing machine comprises a main control board and a display board, the method is applied to the main control board, and the method comprises: In response to detecting that the washing machine is powered off, setting a state of a first power-off identifier, and sending the first power-off identifier to the display board, so that the display board sends target parameters to be stored, the first power-off identifier is used to instruct the display board to send target parameters to the main control board; Receiving the target parameters sent by the display board and storing them; In response to detecting that the washing machine is powered on, sending the target parameters to the display board, so that the display board loads the target parameters to restore the display state before power-off; The display board sends the target parameters to be stored, and carries a second power-off identifier, the second power-off identifier is used to instruct the display board to have sent all the target parameters to be stored; The receiving the target parameters sent by the display board and storing them comprises: Receiving the target parameters sent by the display board and storing them in a memory chip of the main control board; In response to receiving the second power-off identifier, resetting the first power-off identifier, and setting a state of a third power-off identifier, the third power-off identifier is used to instruct that the target parameters of the display board before power-off are stored; In response to detecting that the washing machine is powered on, and detecting that the state of the third power-off identifier instructs that the target parameters of the display board before power-off are stored, obtaining the target parameters from the memory chip; Sending the target parameters to the display board, so that the display board loads the target parameters to restore the display state before power-off. The memory chip of the main control board comprises a plurality of storage areas; 2. The method of claim 1, wherein, The receiving the target parameters sent by the display board and storing them in the memory chip of the main control board comprises: Receiving the target parameters sent by the display board and storing them in a specified storage area in the memory chip. The method further comprises:

3. The method of claim 1, wherein, Sending the first power-off identifier after resetting to the display board, so that the display board resets the second power-off identifier. The method further comprises:

4. The method of claim 1, wherein, In response to receiving a fourth power-off identifier sent by the display board, resetting the state of the third power-off identifier according to the state of the fourth power-off identifier, the fourth power-off identifier is used to instruct that the display board has completed loading the target parameters; Sending the state of the third power-off identifier after resetting to the display board, so that the display board resets the state of the fourth power-off identifier. The washing machine comprises a main control board and a display board, and the method is applied to the display board, the method comprises:

5. A power fail memory method for a laundry machine, characterized in that, In response to receiving a first power-off identifier sent by the main control board, sending target parameters to be stored to the main control board; In response to detecting that the washing machine is powered on, receiving the target parameters sent by the main control board, and loading the target parameters to restore the display state before power-off; The sending the target parameters to be stored to the main control board comprises: ​ setting a state of a second power-off identifier, sending the target parameters to be stored and the second power-off identifier to the main control board, the second power-off identifier being used to indicate that the display board has sent all the target parameters to be stored; The method further comprises: in response to receiving the first power-off identifier sent by the main control board after resetting, resetting the state of the second power-off identifier; The method further comprises: after loading the target parameters, setting a state of a fourth power-off identifier, and sending the fourth power-off identifier to the main control board, so that the main control board resets the state of the third power-off identifier, the fourth power-off identifier being used to indicate that the display board has loaded the target parameters; in response to receiving the third power-off identifier after resetting, resetting the state of the fourth power-off identifier.

6. The method of claim 5, wherein, The method further comprises: in response to detecting that the washing machine is powered off, storing the target parameters to be stored on the display board into the flash memory of the display board; in response to detecting that the washing machine is powered on, reading the target parameters from the flash memory, and loading the target parameters to restore the display state before power off.

7. A laundry machine characterized by The washing machine adopts the method of any one of claims 1-6, and the washing machine comprises a main control board and a display board; The main control board sets a state of a first power-off identifier and sends the first power-off identifier to the display board when detecting that the washing machine is powered off; The display board sends the target parameters to be stored to the main control board when receiving the first power-off identifier sent by the main control board; The main control board receives and stores the target parameters sent by the display board; The main control board sends the target parameters to the display board when detecting that the washing machine is powered on; The display board receives the target parameters sent by the main control board and loads the target parameters to restore the display state before power off when detecting that the washing machine is powered on.

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