Control method of washing machine and washing machine

Abstract

The present invention discloses a control method for a washing machine and a washing machine. In the control method, a fixed-frequency drive mode and a variable-frequency drive mode are preset in a power board. The power board determines whether the washing machine is a fixed-frequency washing machine or a variable-frequency washing machine based on an identification instruction sent by a main control board. If the washing machine is determined to be a fixed-frequency washing machine, the power board switches to the fixed-frequency drive mode; if the washing machine is determined to be a variable-frequency washing machine, the power board switches to the variable-frequency drive mode. The present invention presets the fixed-frequency drive mode and the variable-frequency drive mode in the power board, and automatically determines whether the washing machine is a variable-frequency washing machine or a fixed-frequency washing machine. The power board automatically selects the corresponding operating mode based on the type of washing machine. The same power board can be used in both fixed-frequency and variable-frequency washing machines, thereby simplifying the management of the washing machine power board and improving the production efficiency of the washing machine.

Description

Technical Field

[0001] The present invention belongs to the technical field of washing machines, and in particular, relates to a control method for a washing machine and the washing machine. Background Art

[0002] As a device that automatically washes clothes, washing machines have become an essential household appliance in people's daily lives. The washing machine is equipped with a motor and a drum. The motor drives the drum to rotate, causing the clothes inside the drum to rub against each other, achieving a washing effect. Washing machines can be divided into fixed-frequency washing machines and variable-frequency washing machines based on the type of motor. Fixed-frequency washing machines are equipped with a fixed-frequency motor. The fixed-frequency motor rotates continuously at a high speed during operation, making fixed-frequency washing machines simple to program and relatively inexpensive. Variable-frequency washing machines are equipped with a variable-frequency motor. The speed of the variable-frequency motor can be adjusted during operation, reducing power consumption and minimizing damage to clothes during the washing process.

[0003] Currently, washing machine hardware circuit boards have different combinations for different models or functions. This requires developing control software for each model, resulting in numerous software versions, a significant amount of management work, and low development efficiency. The circuit board for a fixed-frequency washing machine includes a main control board, a fixed-frequency power supply board, and other functional boards. The fixed-frequency power supply board houses the drive circuit for the fixed-frequency motor. The circuit board for a variable-frequency washing machine also includes a main control board, a variable-frequency power supply board, a variable-frequency drive board, and other functional boards. This drives the variable-frequency motor. The fixed-frequency power supply board used in a fixed-frequency washing machine cannot be used in a variable-frequency washing machine, making the power supply board for washing machines universal.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a control method for a washing machine and a washing machine, which can use the same power board in a fixed-frequency washing machine and a variable-frequency washing machine.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A method for controlling a washing machine includes presetting a fixed-frequency drive mode and a variable-frequency drive mode in a power board. The power board determines whether the washing machine is a fixed-frequency washing machine or a variable-frequency washing machine based on an identification instruction sent by a main control board. If the washing machine is determined to be a fixed-frequency washing machine, the power board switches to the fixed-frequency drive mode; if the washing machine is determined to be a variable-frequency washing machine, the power board switches to the variable-frequency drive mode.

[0008] Preferably, the main control board sends an identity recognition instruction to the circuit board bound to the first identity code, and the circuit board bound to the first identity code includes a power board and a variable frequency drive board for driving the variable frequency motor. If the main control board does not receive a response from the variable frequency drive board to the identity recognition instruction, it is determined that the washing machine is a fixed frequency washing machine, the power board switches to the fixed frequency drive mode, and the power board drives the fixed frequency motor.

[0009] Preferably, if the main control board receives a response from the variable frequency drive board to the identity recognition instruction and determines that the washing machine is a variable frequency washing machine, the power board switches to the variable frequency drive mode.

[0010] Preferably, after the main control board sends an identity recognition instruction to the circuit board bound to the first identity code, the power board receives the identity recognition instruction sent by the main control board. If the main control board does not receive a response from the variable frequency drive board to the identity recognition instruction after a preset time, the power board sends a response message to the main control board to determine that the washing machine is a fixed frequency washing machine.

[0011] Preferably, if the main control board receives a response from the variable frequency drive board to the identity recognition instruction within a preset time, it is determined that the washing machine is a variable frequency washing machine.

[0012] Preferably, the main control board sends identity recognition instructions to the circuit board bound to the first identity code multiple times according to a preset number of times. If the main control board still does not receive a response from the variable frequency drive board to the identity recognition instruction after sending the identity recognition instruction for the last time, it is determined that the washing machine is a fixed frequency washing machine, and the power board switches to the fixed frequency drive mode.

[0013] Preferably, if the main control board receives a response from the variable frequency drive board to the identity recognition instruction before sending the identity recognition instruction for the last time, the main control board stops sending the identity recognition instruction, determines that the washing machine is a variable frequency washing machine, and switches the power board to the variable frequency drive mode.

[0014] Preferably, the power board is bound to the first identity code and the second identity code at the same time. After determining that the washing machine is a variable frequency washing machine, the power board no longer responds to the instructions sent by the main control board to the circuit board bound to the first identity code.

[0015] Another object of the present invention is to provide a washing machine using the control method described above, comprising a main control board and a power board connected to the main control board, wherein the power board is bound to a first identity code and a second identity code at the same time.

[0016] Preferably, it includes a variable frequency drive board, the variable frequency drive board is bound to the first identity code, and the variable frequency drive board is connected to the main control board.

[0017] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0018] 1. The present invention presets a fixed-frequency drive mode and a variable-frequency drive mode in a power board, and automatically determines whether a washing machine is a variable-frequency washing machine or a fixed-frequency washing machine. The power board automatically selects the corresponding operating mode according to the type of washing machine. The same power board can be used in both fixed-frequency washing machines and variable-frequency washing machines, thereby simplifying the management of the washing machine power board and improving the production efficiency of the washing machine.

[0019] 2. The present invention binds both the power board and the variable frequency drive board to the first identity code. After the main control board issues an identity recognition instruction, it determines whether the washing machine is a variable frequency washing machine or a fixed frequency washing machine based on whether the variable frequency drive board responds to the identity recognition instruction. Based on the judgment result, the power board is switched to the fixed frequency drive mode or the variable frequency drive mode, thereby realizing the universal use of the power board.

[0020] 3. The present invention allows the main control board to send identity recognition instructions to the circuit board bound to the first identity code multiple times according to a preset number of times, thereby avoiding the frequency conversion drive board not receiving the identity recognition instructions sent by the main control board due to unexpected circumstances, thereby improving the accuracy of the judgment result.

[0021] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0023] Figure 1 It is a flow chart of a control method for a washing machine of the present invention.

[0024] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0028] like Figure 1 As shown, an embodiment of the present invention introduces a control method for a washing machine, in which a fixed frequency drive mode and a variable frequency drive mode are preset in a power board. The power board determines whether the washing machine is a fixed frequency washing machine or a variable frequency washing machine based on an identity recognition instruction sent by a main control board. If the washing machine is determined to be a fixed frequency washing machine, the power board switches to the fixed frequency drive mode; if it is determined to be a variable frequency washing machine, the power board switches to the variable frequency drive mode.

[0029] The present invention presets a fixed-frequency drive mode and a variable-frequency drive mode in a power board, and automatically determines whether a washing machine is a variable-frequency washing machine or a fixed-frequency washing machine, so that the power board automatically selects a corresponding working mode according to the type of washing machine. The same power board can be used in fixed-frequency washing machines and variable-frequency washing machines, thereby simplifying the management of the washing machine power board and improving the production efficiency of the washing machine.

[0030] In an embodiment of the present invention, the main control board sends an identity recognition command to a circuit board associated with a first identity code. The circuit board associated with the first identity code includes a power supply board and a variable-frequency drive board for driving a variable-frequency motor. If the main control board does not receive a response from the variable-frequency drive board to the identity recognition command, the main control board determines that the washing machine is a fixed-frequency washing machine, and the power supply board switches to a fixed-frequency drive mode, thereby driving the fixed-frequency motor. If the main control board receives a response from the variable-frequency drive board to the identity recognition command, the main control board determines that the washing machine is a variable-frequency washing machine, and the power supply board switches to a variable-frequency drive mode.

[0031] Washing machines include fixed-frequency washing machines and variable-frequency washing machines. The circuit board of a fixed-frequency washing machine includes a main control board, a power supply board, and other functional boards. The fixed-frequency washing machine is equipped with a fixed-frequency motor, and the power supply board is used to drive the fixed-frequency motor. The circuit board of a variable-frequency washing machine includes a main control board, a power supply board, a variable-frequency drive board, and other functional boards. The variable-frequency motor is equipped with a variable-frequency motor, and the variable-frequency drive board is used to drive the variable-frequency motor. Both the power supply board and the variable-frequency drive board are bound to the first identity code.

[0032] When a user uses the washing machine for the first time, after the washing machine starts, the main control board sends an identity recognition command to the circuit board bound to the first identity code. If the washing machine is a fixed-frequency washing machine, which does not include a variable-frequency drive board, and the only circuit board bound to the first identity code is the power board, the main control board sends the identity recognition command to the circuit board bound to the first identity code. However, if only the power board receives the identity recognition command sent by the main control board and the main control board cannot receive a response from the variable-frequency drive board to the identity recognition command, the main control board determines that the washing machine is a fixed-frequency washing machine and switches the power board to fixed-frequency drive mode.

[0033] If the washing machine is a variable frequency washing machine and includes a variable frequency drive board, after the main control board sends an identity recognition command to the circuit board associated with the first identity code, both the power board and the variable frequency drive board receive the identity recognition command sent by the main control board. The variable frequency drive board responds to the identity recognition command. The main control board receives the response information sent by the variable frequency drive board to the identity recognition command, then determines that the washing machine is a variable frequency washing machine and switches the power board to variable frequency drive mode. In variable frequency drive mode, the power board is used to drive other loads, such as a display screen and a heater.

[0034] The present invention binds both the power board and the variable frequency drive board to the first identity code. After the main control board issues an identity recognition instruction, it determines whether the washing machine is a variable frequency washing machine or a fixed frequency washing machine based on whether the variable frequency drive board responds to the identity recognition instruction. Based on the judgment result, the power board is switched to the fixed frequency drive mode or the variable frequency drive mode, thereby realizing the universal use of the power board.

[0035] In an embodiment of the present invention, after the main control board sends an identity recognition command to the circuit board associated with the first identity code, the power board receives the identity recognition command sent by the main control board. If, after a preset time, the main control board does not receive a response from the variable frequency drive board to the identity recognition command, the power board sends a response message to the main control board, thereby determining that the washing machine is a fixed-frequency washing machine. If, within the preset time, the main control board receives a response from the variable frequency drive board to the identity recognition command, the washing machine is determined to be a variable-frequency washing machine.

[0036] When determining the type of washing machine, after the power board receives an identification command from the main control board, it does not respond to the identification command from the main control board within a preset time. If, after the preset time, the main control board still does not receive a response from the variable frequency drive board to the identification command, the washing machine is determined to be a fixed frequency washing machine.

[0037] The present invention sets a preset time and determines whether a washing machine is a variable frequency washing machine or a fixed frequency washing machine according to whether the main control board receives a response from the variable frequency driving board to the identity recognition instruction within the preset time, thereby improving the accuracy of the judgment result.

[0038] In an embodiment of the present invention, the main control board sends identity recognition instructions to the circuit board bound to the first identity code multiple times according to a preset number of times. If the main control board still does not receive a response from the variable frequency drive board to the identity recognition instruction after the last time the identity recognition instruction is sent, it is determined that the washing machine is a fixed frequency washing machine, and the power board switches to the fixed frequency drive mode.

[0039] If the main control board receives a response from the variable frequency drive board to the identity identification command before sending the identity identification command for the last time, the main control board stops sending the identity identification command, determines that the washing machine is a variable frequency washing machine, and switches the power board to the variable frequency drive mode.

[0040] The present invention allows the main control board to send identity recognition instructions to the circuit board bound to the first identity code multiple times according to a preset number of times, thereby avoiding the frequency conversion drive board not receiving the identity recognition instructions sent by the main control board due to unexpected circumstances, thereby improving the accuracy of the judgment result.

[0041] In the embodiment of the present invention, the power board is bound to the first identity code and the second identity code at the same time. After determining that the washing machine is a variable frequency washing machine, the power board no longer responds to the instructions sent by the main control board to the circuit board bound to the first identity code.

[0042] In the washing machine's circuit boards, the variable frequency drive board is bound to a first identity code, while the power board is bound to both the first and second identity codes, specifically the power board. When determining the washing machine's type, the main control board sends an identification command to the circuit board bound to the first identity code.

[0043] If the washing machine is a fixed-frequency washing machine, the only circuit board in the washing machine that is bound to the first identity code is the power board. The main control board does not receive a response from the variable frequency drive board to the identity recognition instruction. The power board sends a response message to the main control board to the identity recognition instruction, and determines that the washing machine is a fixed-frequency washing machine. The power board switches to the fixed-frequency drive mode, and the power board is used to drive the fixed-frequency motor.

[0044] If the washing machine is a variable frequency washing machine, the circuit boards in the washing machine that are bound to the first identity code include a power board and a variable frequency drive board. The main control board sends an identity recognition instruction to the power board and the variable frequency drive board. After receiving the identity recognition instruction sent by the main control board, the variable frequency drive board sends a response message to the main control board, determining that the washing machine is a variable frequency washing machine, and the power board does not respond to the identity recognition instruction.

[0045] During subsequent operation of the washing machine, the main control board needs to send instructions to the variable frequency drive board, which drives the variable frequency motor. The identity code associated with the variable frequency drive board is the first identity code. The main control board sends drive instructions to the circuit board associated with the first identity code. The variable frequency drive board drives the variable frequency motor according to the instructions sent by the main control board. Simultaneously, the power board also receives the drive instructions sent by the main control board, but the power board does not respond to the drive instructions sent by the main control board. The power board will only respond after receiving the instructions sent by the main control board to the circuit board associated with the second identity code.

[0046] The present invention allows the power board to be bound to the first identity code and the second identity code at the same time. After determining that the washing machine is a fixed-frequency washing machine, the power board responds to the instruction sent by the main control board to the circuit board bound to the first identity code; after determining that the washing machine is a variable-frequency washing machine, the power board does not respond to the instruction sent by the main control board to the circuit board bound to the first identity code, and the power board only responds to the instruction sent by the main control board to the circuit board bound to the second identity code, thereby avoiding the power board and the variable-frequency drive board from responding at the same time, thereby improving the working efficiency of the washing machine.

[0047] An embodiment of the present invention introduces a washing machine using the control method described in any of the above embodiments, including a main control board and a power board connected to the main control board, wherein the power board is bound to a first identity code and a second identity code.

[0048] When determining the type of washing machine, the main control board sends an identity recognition instruction to the circuit board bound to the first identity code. In this embodiment, the circuit board bound to the first identity code is only the power board. Only the power board receives the identity recognition instruction sent by the main control board. The main control board cannot receive the response of the variable frequency drive board to the identity recognition instruction. The washing machine is determined to be a fixed frequency washing machine, and the power board switches to the fixed frequency drive mode. The power board is used to drive the fixed frequency motor.

[0049] In an embodiment of the present invention, the washing machine further includes a variable frequency drive board, the variable frequency drive board is bound to the first identity code, and the variable frequency drive board is connected to the main control board.

[0050] When determining the type of the washing machine, the main control board sends an identity recognition instruction to the circuit board bound to the first identity code. In this embodiment, the circuit board bound to the first identity code includes a power supply board and a variable frequency drive board. Both the power supply board and the variable frequency drive board receive the identity recognition instruction sent by the main control board. After the main control board receives the response of the variable frequency drive board to the identity recognition instruction, it determines that the washing machine is a variable frequency washing machine, and the power board switches to the variable frequency drive mode. The variable frequency drive board is used to drive the variable frequency motor, and the power board is used to drive other loads, such as display screens.

[0051] The present invention presets a fixed-frequency drive mode and a variable-frequency drive mode in a power board, and automatically determines whether a washing machine is a variable-frequency washing machine or a fixed-frequency washing machine, so that the power board automatically selects a corresponding working mode according to the type of washing machine. The same power board can be used in fixed-frequency washing machines and variable-frequency washing machines, thereby simplifying the management of the washing machine power board and improving the production efficiency of the washing machine.

[0052] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0053] All features disclosed in this specification (including accompanying claims, abstracts and drawings) and all processes or units of any method or apparatus disclosed herein may be combined in any combination, except where at least some of such features and / or processes or units are mutually exclusive. Unless expressly stated otherwise, each feature disclosed in this specification (including accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0054] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features and not other features included in other embodiments, the combination of features from different embodiments is intended to be within the scope of the invention and to form different embodiments.

[0055] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments of equivalent changes using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. The implementation schemes in the above-mentioned embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A method for controlling a washing machine, characterized in that: It includes a main control board and a circuit board, wherein the circuit board includes a power supply board and a variable frequency drive board for driving a variable frequency motor; The power board has a preset fixed frequency driving mode and a variable frequency driving mode; The variable frequency drive board is bound to a first identity code, and the power board is bound to both the first identity code and a second identity code, with the second identity code serving as a unique identity code for the power board; The power board determines whether the washing machine is a fixed-frequency washing machine or a variable-frequency washing machine based on whether the main control board receives a response from the variable-frequency drive board to the identity recognition instruction sent by the main control board to the circuit board bound to the first identity code, and automatically switches the driving mode of the corresponding power board; The identity identification instruction includes identity information for identifying the circuit board, that is, the first identity code or the second identity code; If the main control board does not receive a response from the variable frequency drive board to the identification command, it determines that the washing machine is a fixed frequency washing machine, and the power board switches to the fixed frequency drive mode, and the power board drives the fixed frequency motor; If the main control board receives a response from the variable frequency drive board to the identity recognition instruction, it determines that the washing machine is a variable frequency washing machine. The variable frequency drive board drives the variable frequency motor, and the power board switches to the variable frequency drive mode. After the power board receives the instruction sent by the main control board to the circuit board bound to the second identity code, the power board will respond and drive other loads.

2. A method for controlling a washing machine according to claim 1, characterized in that: After the main control board sends an identity recognition instruction to the circuit board bound to the first identity code, the power board receives the identity recognition instruction sent by the main control board. If the main control board does not receive a response from the variable frequency drive board to the identity recognition instruction after a preset time, the power board sends a response message to the main control board, and determines that the washing machine is a fixed frequency washing machine.

3. A method for controlling a washing machine according to claim 2, characterized in that: If the main control board receives a response from the variable frequency drive board to the identity recognition instruction within a preset time, it is determined that the washing machine is a variable frequency washing machine.

4. The control method of a washing machine according to claim 1, characterized in that: The main control board sends identity recognition instructions to the circuit board bound to the first identity code multiple times according to a preset number of times. If the main control board still does not receive a response from the variable frequency drive board to the identity recognition instruction after the last time the identity recognition instruction is sent, it is determined that the washing machine is a fixed frequency washing machine, and the power board switches to the fixed frequency drive mode.

5. A method for controlling a washing machine according to claim 4, characterized in that: If the main control board receives a response from the variable frequency drive board to the identity identification command before sending the identity identification command for the last time, the main control board stops sending the identity identification command, determines that the washing machine is a variable frequency washing machine, and switches the power board to the variable frequency drive mode.

6. The control method of a washing machine according to claim 1, characterized in that: The power board is bound to the first identity code and the second identity code at the same time. After determining that the washing machine is a variable frequency washing machine, the power board no longer responds to the instructions sent by the main control board to the circuit board bound to the first identity code.

7. A washing machine using the control method according to any one of claims 1 to 6, characterized in that: It includes a main control board and a power supply board connected to the main control board, and the power supply board is bound to a first identity code and a second identity code at the same time.

8. The washing machine according to claim 7, characterized in that: It includes a variable frequency drive board, which is connected to the main control board.

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