A laundry washing machine and control method

Abstract

The application discloses a washing machine and a control method. A main controller of the washing machine is configured to: when receiving fault information sent by a fan frequency conversion controller, determine the type of the fault information and the corresponding receiving frequency; and execute a preset control instruction according to the type and the receiving frequency; wherein the fault information is determined by the fan frequency conversion controller according to first group parameter information or second group parameter information of the fan, the first group parameter information comprises the current rotating speed and the current power of the fan, and the second group parameter information comprises the current rotating speed and the current current of the fan, so that the running state of the fan in the drying module can be accurately determined.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of washing machine control, and more particularly, to a washing machine and a control method. BACKGROUND

[0002] With the upgrading of consumption, the market needs for washing and drying integrated washing machines that have washing, rinsing, dewatering and drying functions are gradually increasing. If the drying function is used for a long time, lint is easily generated, which is attached and accumulated on the fan blade wheel of the fan in the drying module and its periphery, further causing the fan blade wheel to reduce in speed, the air volume to become small, or even the fan blade wheel to be blocked and have no air volume output, or the fan blade screw to be not fastened in place, long-term operation to cause the fan blade wheel to be loose, and the fan to continuously operate but have no air volume output and other problems.

[0003] At present, most of the fans of washing and drying integrated machines on the market are fixed-frequency and fixed-speed alternating current asynchronous fan solutions or shaded-pole fan solutions, which cannot detect the speed, power and current of the fan. If the fan blade wheel of the fan has problems such as a reduced speed, blocking, loosening and the like, the controller cannot timely determine the state of the fan blade wheel, and the heating tube will continuously heat, which will cause the manual temperature controller in the air duct system to be disconnected and alarm, further causing after-sales maintenance, and the continuous heating of the heating tube has risks of causing deformation and damage of the fan blade wheel, flange and other components.

[0004] Therefore, how to propose a washing machine that can accurately determine the running state of the fan in the drying module and further improve safety is a technical problem to be solved at present. SUMMARY

[0005] The present application provides a washing machine to solve the technical problem that the running state of the fan in the drying module cannot be accurately determined in the prior art.

[0006] The washing machine comprises a cabinet provided with a door through which laundry is put in;

[0007] an outer tub arranged inside the cabinet to store washing water in the inside of the outer tub;

[0008] a drum arranged in the outer tub to hold the laundry;

[0009] a drum driving part arranged at the rear of the outer tub to rotate the drum;

[0010] a drying module arranged in the cabinet to supply heated air to the inside of the drum to dry the laundry;

[0011] The drying module further comprises a fan to flow air, and a heating tube arranged on the flow path of the air to heat the flowing air;

[0012] The controller comprises a fan frequency conversion controller and a main controller connected with each other, the fan frequency conversion controller is further connected with the fan, and the main controller is further connected with the drying module and the drum driving part.

[0013] The main controller is configured to:

[0014] When the fault information sent by the fan frequency conversion controller is received, the type of the fault information and the corresponding receiving times are determined.

[0015] A preset control instruction is executed according to the type and the receiving times.

[0016] The fault information is determined by the fan frequency conversion controller according to first group parameter information or second group parameter information of the fan, the first group parameter information comprises current rotating speed and current power of the fan, and the second group parameter information comprises current rotating speed and current current of the fan.

[0017] In some embodiments of the present application, the washing machine further comprises a display module for displaying state information and alarm information of the washing machine, the type comprises a first type corresponding to the first group parameter information and a second type corresponding to the second group parameter information, and the main controller is specifically configured to:

[0018] If the type is the first type and the receiving times are not less than a preset number of times, a first preset control instruction is executed, the first preset control instruction comprises turning off the power supply of a specified load and displaying overspeed alarm information on the display module.

[0019] If the type is the second type and the receiving times are not less than the preset number of times, a second preset control instruction is executed, the second preset control instruction comprises turning off the power supply of the specified load and displaying stall alarm information on the display module.

[0020] The specified load comprises the heating pipe, the fan and the drum driving part.

[0021] In some embodiments of the present application, the main controller is further specifically configured to:

[0022] If the receiving times are less than the preset number of times, a third preset control instruction is executed, the third preset control instruction comprises turning off the power supply of the specified load and turning on the power supply of the specified load when a first preset time length is reached, and sending an instruction of starting the fan to the frequency conversion controller.

[0023] By applying the above technical solution, the main controller of the washing machine is configured to: when receiving the fault information sent by the fan frequency conversion controller, determine the type of the fault information and the corresponding receiving frequency; and execute a preset control instruction according to the type and the receiving frequency; wherein the fault information is determined by the fan frequency conversion controller according to the first group of parameter information or the second group of parameter information of the fan, the first group of parameter information includes the current speed and the current power of the fan, and the second group of parameter information includes the current speed and the current current of the fan, so that the running state of the fan in the drying module can be accurately determined, and when the fan fails, the preset control instruction is executed to ensure safety.

[0024] Correspondingly, the application also provides a washing machine, which comprises:

[0025] a cabinet configured with a door for putting washing objects;

[0026] an outer tub arranged inside the cabinet and storing washing water inside the outer tub;

[0027] a drum arranged in the outer tub and used for containing the washing objects;

[0028] a drum driving part arranged at the rear part of the outer tub and used for rotating the drum;

[0029] a drying module arranged in the cabinet and used for supplying heated air to the inside of the drum to dry clothes;

[0030] The drying module further comprises: a fan used for flowing air; and a heating pipe arranged on the flow path of the air and used for heating the flowing air.

[0031] a controller comprising a fan frequency conversion controller and a main controller connected with each other, the fan frequency conversion controller is further connected with the fan, and the main controller is further connected with the drying module and the drum driving part;

[0032] The fan frequency conversion controller is configured to:

[0033] obtain the current speed of the fan;

[0034] if the current speed is greater than a first preset speed, obtain the current power of the fan, and control the fan according to the current speed and the current power;

[0035] if the current speed is less than a second preset speed, obtain the current current of the fan, and control the fan according to the current speed and the current current.

[0036] In some embodiments of the application, the fan frequency conversion controller is specifically configured to:

[0037] If the current rotating speed is greater than the first preset rotating speed, a reference power and a first reference time length corresponding to the current rotating speed are determined according to a first preset relationship table, the fan is stopped when the current power is less than the reference power and the first reference time length is maintained, and first type of fault information is sent to the main controller;

[0038] If the current rotating speed is less than the second preset rotating speed, a reference current and a second reference time length corresponding to the current rotating speed are determined according to a second preset relationship table, the fan is stopped when the current current is greater than the reference current and the second reference time length is maintained, and second type of fault information is sent to the main controller;

[0039] The first preset relationship table represents the corresponding relationship between the rotating speed greater than the first preset rotating speed and the reference power and the first reference time length, and the second preset relationship table represents the corresponding relationship between the rotating speed less than the second preset rotating speed and the reference current and the second reference time length.

[0040] By applying the above technical scheme, the fan variable frequency controller of the washing machine is configured to: obtain the current rotating speed of the fan; if the current rotating speed is greater than the first preset rotating speed, obtain the current power of the fan, and control the fan according to the current rotating speed and the current power; if the current rotating speed is less than the second preset rotating speed, obtain the current current of the fan, and control the fan according to the current rotating speed and the current current, so that the running state of the fan in the drying module can be accurately determined, and when the fan fails, the fan is stopped and the fault information is sent to the main controller, thereby ensuring safety.

[0041] Correspondingly, the application also provides a control method of a washing machine, which is applied to a washing machine comprising a cabinet, an outer tub, a drum, a drum driving part, a drying module and a controller. The drying module further comprises a fan for flowing air, and a heating pipe arranged on the air flow path for heating the flowing air. The controller comprises a fan variable frequency controller and a main controller connected with each other, the fan variable frequency controller is further connected with the fan, and the main controller is further connected with the drying module and the drum driving part. The method comprises the following steps:

[0042] When receiving the fault information sent by the fan variable frequency controller, the main controller determines the type of the fault information and the corresponding receiving times;

[0043] The main controller executes a preset control instruction according to the type and the receiving times;

[0044] The fault information is determined by the frequency conversion controller of the fan according to the first group of parameter information or the second group of parameter information, the first group of parameter information includes the current rotating speed and the current power of the fan, and the second group of parameter information includes the current rotating speed and the current current of the fan.

[0045] In some embodiments of the present application, the washing machine further comprises a display module for displaying state information and alarm information of the washing machine, the types include a first type corresponding to the first group of parameter information and a second type corresponding to the second group of parameter information, and the main controller executes a preset control instruction according to the type and the receiving frequency, specifically:

[0046] If the type is the first type and the receiving frequency is not less than a preset frequency, the main controller executes a first preset control instruction, and the first preset control instruction includes turning off the power supply of the specified load and displaying an overspeed alarm information on the display module.

[0047] If the type is the second type and the receiving frequency is not less than the preset frequency, the main controller executes a second preset control instruction, and the second preset control instruction includes turning off the power supply of the specified load and displaying a locked-rotor alarm information on the display module.

[0048] The specified load includes the heating pipe, the fan and the drum driving part.

[0049] In some embodiments of the present application, the method further comprises:

[0050] If the receiving frequency is less than the preset frequency, the main controller executes a third preset control instruction, and the third preset control instruction includes turning off the power supply of the specified load and turning on the power supply of the specified load when a first preset time length is reached, and sending an instruction of starting the fan to the frequency conversion controller.

[0051] Correspondingly, the present application further provides a control method of a washing machine, which is applied to a washing machine comprising a box body, an outer drum, a drum, a drum driving part, a drying module and a controller, the drying module further comprises a fan for flowing air, and a heating pipe arranged on the flow path of the air for heating the flowing air, the controller comprises a fan frequency conversion controller and a main controller connected with each other, the fan frequency conversion controller is further connected with the fan, the main controller is further connected with the drying module and the drum driving part, and the method comprises:

[0052] The fan frequency conversion controller acquires the current rotating speed of the fan.

[0053] If the current rotating speed is greater than the first preset rotating speed, the fan frequency conversion controller acquires the current power of the fan, and controls the fan according to the current rotating speed and the current power;

[0054] If the current rotating speed is less than the second preset rotating speed, the fan frequency conversion controller acquires the current current of the fan, and controls the fan according to the current rotating speed and the current current.

[0055] In some embodiments of the present application,

[0056] controlling the fan according to the current rotating speed and the current power, specifically, the fan frequency conversion controller determines the reference power and the first reference time length corresponding to the current rotating speed according to a first preset relationship table, and stops the fan when the current power is less than the reference power and the first reference time length is maintained, and sends the first type of fault information to the main controller;

[0057] controlling the fan according to the current rotating speed and the current current, specifically, the fan frequency conversion controller determines the reference current and the second reference time length corresponding to the current rotating speed according to a second preset relationship table, and stops the fan when the current current is greater than the reference current and the second reference time length is maintained, and sends the second type of fault information to the main controller;

[0058] The first preset relationship table represents the corresponding relationship between the rotating speed greater than the first preset rotating speed and the reference power and the first reference time length, and the second preset relationship table represents the corresponding relationship between the rotating speed less than the second preset rotating speed and the reference current and the second reference time length. BRIEF DESCRIPTION OF DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0060] Figure 1 The structure of the washing machine in the embodiment of the present application is shown;

[0061] Figure 2 The flowchart of the control method of the washing machine in the embodiment of the present application is shown;

[0062] Figure 3 The flowchart of the control method of the washing machine in another embodiment of the present application is shown;

[0063] Figure 4A flowchart of a control method of a washing machine in another embodiment of the present application is shown.

[0064] wherein, Figure 1 1 is a display panel, 2 is a fan, 3 is a fan blade wheel, 4 is a wind channel system, 5 is a box body, 6 is a fan frequency conversion board, 7 is a main control board, 8 is a wire harness, and 9 is a front door frame. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. 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.

[0066] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0067] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0068] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the terms in the present application can be understood according to the specific circumstances.

[0069] The present application provides a washing machine, such as Figure 1 as shown, comprising:

[0070] The box body 5 is provided with a door for putting in washing materials, which can be arranged at the upper part or the front part of the box body, and in some embodiments of the present application, as shown in the figure, the door corresponds to the front door frame 9. Figure 1 as shown, comprising:

[0071] A drying module is arranged in the cabinet 5, and is configured to supply heated air to the inside of the drum to dry laundry; the drying module further comprises: a fan 2 driven by a brushless direct current (BLDC) motor and capable of variable frequency operation, and a fan blade 3 arranged on the fan 2 and configured to flow air; a heating pipe arranged in an air flow path of the air flowing through a suction duct, the fan, and a discharge duct, and configured to heat the flowing air; the suction duct and the discharge duct form an air duct system 4.

[0072] A controller comprising a fan variable frequency controller and a main controller connected to each other, the fan variable frequency controller further connected to the fan, and the main controller further connected to the drying module and the drum driving part; the fan variable frequency controller is implemented based on a fan variable frequency board 6, and the main controller is implemented based on a main control board 7.

[0073] The controller and the drying module are connected through a wire harness 8.

[0074] The washing machine further comprises:

[0075] An outer tub arranged in the inside of the cabinet and configured to store washing water;

[0076] A drum arranged in the outer tub and configured to hold the washing objects;

[0077] A drum driving part arranged at the rear of the outer tub and configured to rotate the drum.

[0078] The main controller is configured to:

[0079] When receiving the fault information sent by the fan variable frequency controller, determine the type of the fault information and the corresponding receiving times;

[0080] Execute a preset control instruction according to the type and the receiving times;

[0081] The fault information is determined by the fan variable frequency controller according to first group parameter information or second group parameter information of the fan; the first group parameter information comprises a current rotating speed and a current power of the fan, and the second group parameter information comprises a current rotating speed and a current current of the fan.

[0082] Specifically, the fan frequency converter can detect the current speed, the current power and the current current of the fan, the fan frequency converter can determine whether the fan is abnormal according to the current speed and the current power, that is, the first group of parameter information, and also can determine whether the fan is abnormal according to the current speed and the current current, that is, the second group of parameter information, if the fan is abnormal, the fan frequency converter sends corresponding fault information to the main controller, when the main controller receives the fault information sent by the fan frequency converter, it indicates that the fan in the drying module is abnormal, the main controller determines the type of the fault information and the corresponding receiving frequency, and executes the preset control instruction according to the type and the receiving frequency.

[0083] In order to reliably process the fault of the fan, in the preferred embodiment of the application, the washing machine further comprises a display module, that is, a display panel 1, for displaying the state information and alarm information of the washing machine, the type includes a first type corresponding to the first group of parameter information and a second type corresponding to the second group of parameter information, and the main controller is specifically configured to:

[0084] If the type is the first type and the receiving frequency is not less than a preset frequency, a first preset control instruction is executed, the first preset control instruction includes turning off the power supply of the specified load, and displaying the overspeed alarm information on the display module;

[0085] If the type is the second type and the receiving frequency is not less than the preset frequency, a second preset control instruction is executed, the second preset control instruction includes turning off the power supply of the specified load, and displaying the stall alarm information on the display module;

[0086] The specified load includes the heating pipe, the fan and the drum driving part.

[0087] As described above, the type includes a first type corresponding to the first group of parameter information and a second type corresponding to the second group of parameter information, in the specific application scenario of the application, the first type can represent that the fan blade wheel has the problem of loose or falling off, and the second type can represent that the fan blade wheel has the problem of stall.

[0088] If the type is the first type and the receiving frequency is not less than a preset frequency, it indicates that the fan may have the problem of loose or falling off of the fan blade wheel, the main controller turns off the power supply of the specified load, which can be the heating pipe, the fan and the drum driving part, when the water inlet valve of the washing machine is in the open state, the specified load also includes the water inlet valve, and the person skilled in the art can also select to control other loads according to the actual situation. And send the overspeed alarm information to the display module, so that the display module displays, prompts the user to handle, and also can make the after-sales faster to check and locate the fault reason.

[0089] If the type is the second type and the receiving frequency is not less than the preset frequency, it indicates that the fan may have a locked-rotor problem, the main controller turns off the power supply of a specified load, which can be the heating tube, the fan and the drum driving part, and when the water inlet valve of the washing machine is in an open state, the specified load also includes the water inlet valve, and sends an overspeed alarm information to the display module to make the display module display.

[0090] In the preferred embodiment of the present application, the preset frequency is 10 times, and the skilled person in the art can flexibly set the preset frequency, which does not affect the protection scope of the present application.

[0091] In order to reliably handle the failure of the fan, in the preferred embodiment of the present application, the main controller is further specifically configured to:

[0092] If the receiving frequency is less than the preset frequency, a third preset control instruction is executed, and the third preset control instruction includes: turning off the power supply of the specified load and turning on the power supply of the specified load when a first preset time length is reached, and sending an instruction to start the fan to the variable frequency controller.

[0093] Specifically, if the receiving frequency is less than the preset frequency, it indicates that the fan is abnormal but can still be tried to continue to run, the main controller turns off the power supply of the specified load and turns on the power supply of the specified load when a first preset time length is reached, and sends an instruction to start the fan to the variable frequency controller, so as to restart the fan, thereby the drying work can be continued when the fan failure is not serious.

[0094] By applying the above technical solution, the main controller of the washing machine is configured to: when receiving the failure information sent by the fan variable frequency controller, determine the type of the failure information and the corresponding receiving frequency; and execute a preset control instruction according to the type and the receiving frequency; wherein the failure information is determined by the fan variable frequency controller according to the first group of parameter information or the second group of parameter information of the fan, the first group of parameter information includes the current speed and the current power of the fan, and the second group of parameter information includes the current speed and the current current of the fan, so that the running state of the fan in the drying module can be accurately determined, and when the fan fails, the preset control instruction is executed, thereby ensuring safety.

[0095] Another embodiment of the present application further provides a washing machine, which comprises:

[0096] A cabinet is configured with a door for putting in washing materials;

[0097] An outer tub is configured in the interior of the cabinet, and washing water is stored in the interior of the outer tub;

[0098] A drum is arranged in the outer tub and used to hold the laundry;

[0099] A drum driving part is arranged at the rear of the outer tub and used to rotate the drum;

[0100] A drying module is arranged in the cabinet and used to supply heated air to the inside of the drum to dry the laundry;

[0101] The drying module further comprises: a fan used to flow air; and a heating pipe arranged on the flow path of the air and used to heat the flowing air;

[0102] A controller comprises a fan variable frequency controller and a main controller connected to each other, the fan variable frequency controller is further connected to the fan, and the main controller is further connected to the drying module and the drum driving part;

[0103] The fan variable frequency controller is configured to:

[0104] obtain a current rotating speed of the fan;

[0105] if the current rotating speed is greater than a first preset rotating speed, obtain a current power of the fan, and control the fan according to the current rotating speed and the current power;

[0106] if the current rotating speed is less than a second preset rotating speed, obtain a current current of the fan, and control the fan according to the current rotating speed and the current current.

[0107] Specifically, the fan variable frequency controller can detect the current rotating speed of the fan and determine the detection mode of the fan state according to the current rotating speed.

[0108] If the current rotating speed is greater than the first preset rotating speed, the rotating speed of the fan is high at this time, which is convenient for detecting whether the fan has an overspeed problem due to loose or falling of the fan blade, obtaining the current power, and controlling the fan according to the current rotating speed and the current power; if the current rotating speed is less than the second preset rotating speed, the rotating speed of the fan is low at this time, which is convenient for detecting whether the fan has a rotating speed reduction or locked-rotor problem, obtaining the current current, and controlling the fan according to the current rotating speed and the current current. The first preset rotating speed is greater than the second preset rotating speed, and in some embodiments of the application, the first preset rotating speed can be 2000 rpm, and the second preset rotating speed can be 600 rpm.

[0109] In order to reliably determine the operating state of the fan, in the preferred embodiments of the application, the fan variable frequency controller is specifically configured to:

[0110] If the current rotating speed is greater than the first preset rotating speed, a reference power and a first reference time length corresponding to the current rotating speed are determined according to a first preset relationship table, the fan is stopped when the current power is less than the reference power and the first reference time length is maintained, and first type of fault information is sent to the main controller;

[0111] If the current rotating speed is less than the second preset rotating speed, a reference current and a second reference time length corresponding to the current rotating speed are determined according to a second preset relationship table, the fan is stopped when the current current is greater than the reference current and the second reference time length is maintained, and second type of fault information is sent to the main controller;

[0112] The first preset relationship table represents the corresponding relationship between the rotating speed greater than the first preset rotating speed and the reference power and the first reference time length, and the second preset relationship table represents the corresponding relationship between the rotating speed less than the second preset rotating speed and the reference current and the second reference time length.

[0113] Specifically, a first preset relationship table representing the corresponding relationship between the rotating speed greater than the first preset rotating speed and the reference power and the first reference time length is established in advance, and a second preset relationship table representing the corresponding relationship between the rotating speed less than the second preset rotating speed and the reference current and the second reference time length is established.

[0114] In some embodiments of the present application, in the first preset relationship table, the rotating speed n of the fan ranges from n>n1, n2<n<n1, n3<n<n2, n4<n<n3, the first reference time length corresponding to each range is t1, the reference power is P1 when n>n1, the reference power is P2 when n2<n<n1, the reference power is P3 when n3<n<n2, and the reference power is P4 when n4<n<n3. In the second preset relationship table, the rotating speed n ranges from n<n5 and n5<n<n4, the reference current is A1 and the second reference time length is t1 when n<n5, and the reference current is A2 and the second reference time length is t2 when n5<n<n4, wherein t1<t2, P1>P2>P3>P4, and A1<A2.

[0115] In a specific application scenario of the present application, n1=3800rpm, n2=3000rpm, n3=2500rpm, n4=2000rpm, n5=600rpm, t1=5s, t2=60s, P1=12W, P2=10W, P3=7W, P4=4W, A1=0.24A, and A2=0.6.

[0116] If the current rotating speed is greater than the first preset rotating speed, a reference power and a first reference time length corresponding to the current rotating speed are determined according to a first preset relationship table; when the current power is less than the reference power and the first reference time length is maintained, it is indicated that the fan may be overspeeding, the fan variable frequency controller stops the fan, and sends first type of fault information to the main controller; if the current rotating speed is less than the second preset rotating speed, a reference current and a second reference time length corresponding to the current rotating speed are determined according to a second preset relationship table; when the current current is greater than the reference current and the second reference time length is maintained, it is indicated that the fan may be overspeeding, the fan variable frequency controller stops the fan, and sends second type of fault information to the main controller.

[0117] By applying the above technical solution, the fan variable frequency controller of the washing machine is configured to acquire the current rotating speed of the fan; if the current rotating speed is greater than the first preset rotating speed, the current power of the fan is acquired, and the fan is controlled according to the current rotating speed and the current power; if the current rotating speed is less than the second preset rotating speed, the current current of the fan is acquired, and the fan is controlled according to the current rotating speed and the current current, so that the running state of the fan in the drying module can be accurately determined, and when the fan fails, the fan is stopped and the fault information is sent to the main controller, thereby ensuring safety.

[0118] In order to further illustrate the technical idea of the application, the technical solution of the application will be described in combination with a specific application scenario, wherein the following fan variable frequency board corresponds to the fan variable frequency controller, and the main control board corresponds to the main controller. As shown in Figure 2

[0119] (1) The fan variable frequency board controls and detects the rotating speed, power and current of the fan in real time. If the rotating speed is detected to be greater than 3800 rpm, the power is further judged. If the power > 12 W, the fan variable frequency board does not report a fault, and the fan continues to run, and the fan variable frequency board continues to monitor. If the power < 12 W, whether the power is continuously for 5 s is further judged. If the duration < 5 s, the fan variable frequency board does not report a fault, and the fan continues to run. If the duration > 5 s, the fan variable frequency board immediately closes the fan running, and sends a fault code 0X00 to the main control board through a communication protocol. The main control board counts the received fault codes. If < 10 times, the main control board closes the power supply of the load such as a heating tube, a fan and a motor, such as a relay or a thyristor, for 30 s. After 30 s, the main control board re-communicates with the fan variable frequency board to attempt to start the fan running. If > 10 times, the main control board immediately closes the power supply of all loads such as a heating tube, a motor and a water inlet valve, and sends fault information to a display board to alarm F00. The alarm is defined as an overspeed alarm, that is, it is determined that the fan blade has a problem of loose or falling fan blade. ​

[0120] (2) When the detected rotation speed is in the range of 3100rpm < n < 3800rpm, 2500rpm < n < 3100rpm, 2000rpm < n < 2500rpm respectively, the control logic is as shown in Figure 2 (1), which will not be repeated here.

[0121] (3) When the fan frequency conversion board detects the rotation speed n < 600rpm, the current of the fan operation is further judged. When the current < 0.24, no fault is reported, and the fan continues to run. When the current > 0.24A, the duration of the current > 0.24A is further detected. If the duration < 5S, no fault is reported, and the fan continues to run. If the duration > 5S, the fan frequency conversion board immediately closes the fan operation, and sends the fault code 0X01 to the main control board through the communication protocol. The main control board counts the received fault code. If < 10 times, the main control board closes the power supply of the heating tube / fan / motor and other loads such as relays or thyristors for 30S. After 30S, the main control board re-communicates with the fan frequency conversion board to attempt to start the fan operation. If it is greater than 10 times, the main control board closes all loads such as heating tubes, motors, water valves, and sends fault information to the display board, and alarms F01. The alarm is defined as a stall alarm, that is, it is determined that there is a problem such as accumulation of dust on the fan blade, reduction of fan speed or stall.

[0122] (4) When the detected rotation speed is in the range of 600rpm < n < 2000rpm, the control logic is as shown in Figure 2 (3), which will not be repeated here.

[0123] Corresponding to the washing machine in the embodiments of the present application, the embodiments of the present application also propose a control method of a washing machine, applied to a washing machine comprising a cabinet, an outer tub, a drum, a drum driving part, a drying module and a controller. The drying module further comprises: a fan for flowing air; a heating tube arranged on the flow path of the air for heating the flowing air; the controller comprises a fan frequency conversion controller and a main controller connected to each other, the fan frequency conversion controller is further connected to the fan, and the main controller is further connected to the drying module and the drum driving part. As shown in Figure 3 , the method comprises:

[0124] Step S301, when receiving the fault information sent by the fan frequency conversion controller, the main controller determines the type of the fault information and the corresponding receiving times.

[0125] The fault information is determined by the frequency conversion controller of the fan according to first group parameter information or second group parameter information of the fan, the first group parameter information including current rotating speed and current power of the fan, and the second group parameter information including current rotating speed and current current of the fan.

[0126] In step S302, the main controller executes a preset control instruction according to the type and the receiving frequency.

[0127] In order to reliably handle the fault of the fan, in the preferred embodiment of the present application, the type includes a first type corresponding to the first group parameter information and a second type corresponding to the second group parameter information, and the main controller executes a preset control instruction according to the type and the receiving frequency, specifically:

[0128] If the type is the first type and the receiving frequency is not less than a preset frequency, the main controller executes a first preset control instruction, and the first preset control instruction includes turning off the power supply of the specified load and displaying overspeed alarm information on the display module.

[0129] If the type is the second type and the receiving frequency is not less than the preset frequency, the main controller executes a second preset control instruction, and the second preset control instruction includes turning off the power supply of the specified load and displaying stall alarm information on the display module.

[0130] The specified load includes the heating pipe, the fan and the drum driving part.

[0131] In order to reliably handle the fault of the fan, in the preferred embodiment of the present application, the method further includes:

[0132] If the receiving frequency is less than the preset frequency, the main controller executes a third preset control instruction, and the third preset control instruction includes turning off the power supply of the specified load and turning on the power supply of the specified load when a first preset time length is reached, and sending an instruction to start the fan to the frequency conversion controller.

[0133] Correspondingly, another embodiment of the present application further provides a control method of a washing machine, applied to a washing machine including a box body, an outer drum, a drum, a drum driving part, a drying module and a controller, the drying module further including a fan for flowing air, and a heating pipe arranged on an air flow path for heating the flowing air, and the controller including a fan frequency conversion controller and a main controller connected with each other, the fan frequency conversion controller further connected with the fan, and the main controller further connected with the drying module and the drum driving part, as shown in Figure 4 The method includes:

[0134] In step S401, the fan variable frequency controller acquires the current rotating speed of the fan.

[0135] In step S402, if the current rotating speed is greater than the first preset rotating speed, the fan variable frequency controller acquires the current power of the fan, and controls the fan according to the current rotating speed and the current power.

[0136] In step S403, if the current rotating speed is less than the second preset rotating speed, the fan variable frequency controller acquires the current current of the fan, and controls the fan according to the current rotating speed and the current current.

[0137] In order to reliably determine the operating state of the fan, in the preferred embodiment of the present application, the fan is controlled according to the current rotating speed and the current power, specifically: the fan variable frequency controller determines the reference power and the first reference time length corresponding to the current rotating speed according to a first preset relationship table, and stops the fan when the current power is less than the reference power and the first reference time length is maintained, and sends first type of fault information to the main controller;

[0138] The fan is controlled according to the current rotating speed and the current current, specifically: the fan variable frequency controller determines the reference current and the second reference time length corresponding to the current rotating speed according to a second preset relationship table, and stops the fan when the current current is greater than the reference current and the second reference time length is maintained, and sends second type of fault information to the main controller;

[0139] The first preset relationship table represents the corresponding relationship between the rotating speed greater than the first preset rotating speed and the reference power and the first reference time length, and the second preset relationship table represents the corresponding relationship between the rotating speed less than the second preset rotating speed and the reference current and the second reference time length.

[0140] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not drive the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A laundry machine characterized by, The laundry machine comprises: a cabinet configured with a door for putting in laundry; an outer tub configured inside the cabinet, storing washing water inside the outer tub; a drum configured in the outer tub, for containing the laundry; a drum driving part configured at the rear of the outer tub, for rotating the drum; a drying module arranged in the cabinet, for supplying heated air to the inside of the drum to dry the laundry; the drying module further comprises: a fan for flowing air; a heating pipe configured on the flow path of the air, for heating the flowing air; a controller comprising a fan frequency conversion controller and a main controller connected to each other, the fan frequency conversion controller further connected to the fan, and the main controller further connected to the drying module and the drum driving part; the main controller is configured to: determine the type of the fault information and the corresponding receiving frequency when receiving the fault information sent by the fan frequency conversion controller; execute a preset control instruction according to the type and the receiving frequency; wherein the fault information is determined by the fan frequency conversion controller according to the first group of parameter information or the second group of parameter information of the fan, the first group of parameter information comprising the current speed and the current power of the fan, and the second group of parameter information comprising the current speed and the current current of the fan; the laundry machine further comprises a display module for displaying the state information and the alarm information of the laundry machine, the type comprises a first type corresponding to the first group of parameter information and a second type corresponding to the second group of parameter information, and the main controller is specifically configured to: if the type is the first type and the receiving frequency is not less than a preset frequency, execute a first preset control instruction, the first preset control instruction comprising turning off the power supply of a specified load and displaying an overspeed alarm information on the display module; if the type is the second type and the receiving frequency is not less than the preset frequency, execute a second preset control instruction, the second preset control instruction comprising turning off the power supply of the specified load and displaying a stall alarm information on the display module; wherein the specified load comprises the heating pipe, the fan and the drum driving part.

2. A laundry machine as claimed in claim 1, characterized in that, the main controller is further specifically configured to: if the receiving frequency is less than the preset frequency, execute a third preset control instruction, the third preset control instruction comprising: turning off the power supply of the specified load and turning on the power supply of the specified load when a first preset time length is reached, and sending an instruction to start the fan to the frequency conversion controller.

3. A laundry machine characterized by, The laundry machine comprises: a cabinet configured with a door for putting in laundry; an outer tub configured inside the cabinet, storing washing water inside the outer tub; a drum configured in the outer tub, for containing the laundry; a drum driving part configured at the rear of the outer tub, for rotating the drum; a drying module arranged in the cabinet, for supplying heated air to the inside of the drum to dry the laundry; the drying module further comprises: a fan for flowing air; a heating pipe configured on the flow path of the air, for heating the flowing air; The controller comprises a fan frequency conversion controller and a main controller connected with each other, the fan frequency conversion controller is further connected with the fan, and the main controller is further connected with the drying module and the drum driving part; The fan frequency conversion controller is configured to: obtain a current rotating speed of the fan; if the current rotating speed is greater than a first preset rotating speed, obtain a current power of the fan, and control the fan according to the current rotating speed and the current power; if the current rotating speed is less than a second preset rotating speed, obtain a current current of the fan, and control the fan according to the current rotating speed and the current current; The fan frequency conversion controller is specifically configured to: if the current rotating speed is greater than the first preset rotating speed, determine a reference power and a first reference time corresponding to the current rotating speed according to a first preset relationship table, and stop the fan when the current power is less than the reference power and the first reference time is maintained, and send first type fault information to the main controller; if the current rotating speed is less than the second preset rotating speed, determine a reference current and a second reference time corresponding to the current rotating speed according to a second preset relationship table, and stop the fan when the current current is greater than the reference current and the second reference time is maintained, and send second type fault information to the main controller; The first preset relationship table represents the corresponding relationship between the rotating speed greater than the first preset rotating speed and the reference power and the first reference time, and the second preset relationship table represents the corresponding relationship between the rotating speed less than the second preset rotating speed and the reference current and the second reference time.

4. A control method of a washing machine, characterized by, The method is applied to a washing machine comprising a cabinet, an outer drum, a drum, a drum driving part, a drying module and a controller, the drying module further comprises: a fan for flowing air; a heating pipe arranged on the flow path of the air for heating the flowing air; the controller comprises a fan frequency conversion controller and a main controller connected with each other, the fan frequency conversion controller is further connected with the fan, and the main controller is further connected with the drying module and the drum driving part, and the method comprises: When receiving the fault information sent by the fan frequency conversion controller, the main controller determines the type of the fault information and the corresponding receiving frequency; The main controller executes a preset control instruction according to the type and the receiving frequency; The fault information is determined by the fan frequency conversion controller according to the first group of parameter information or the second group of parameter information of the fan, the first group of parameter information comprises the current rotating speed and the current power of the fan, and the second group of parameter information comprises the current rotating speed and the current current of the fan; The washing machine further comprises a display module for displaying the state information and the alarm information of the washing machine, the type comprises a first type corresponding to the first group of parameter information and a second type corresponding to the second group of parameter information, and the main controller executes a preset control instruction according to the type and the receiving frequency, specifically: If the type is the first type and the receiving frequency is not less than a preset frequency, the main controller executes a first preset control instruction, the first preset control instruction comprising turning off power supply of a specified load and displaying overspeed alarm information on the display module; If the type is the second type and the receiving frequency is not less than the preset frequency, the main controller executes a second preset control instruction, the second preset control instruction comprising turning off power supply of the specified load and displaying stall alarm information on the display module; The specified load comprises the heating pipe, the fan and the drum driving part.

5. The method of claim 4, wherein, The method further comprises: If the receiving frequency is less than the preset frequency, the main controller executes a third preset control instruction, the third preset control instruction comprising turning off power supply of the specified load and turning on power supply of the specified load when a first preset time length is reached, and sending an instruction to start the fan to the frequency conversion controller.

6. A control method of a laundry machine, characterized by, The method is applied to a washing machine comprising a cabinet, an outer tub, a drum, a drum driving part, a drying module and a controller, the drying module further comprising a fan for flowing air, a heating pipe arranged on an air flow path for heating the flowing air, and the controller comprising a fan frequency conversion controller and a main controller connected to each other, the fan frequency conversion controller further connected to the fan, and the main controller further connected to the drying module and the drum driving part, the method comprising: The fan frequency conversion controller acquires a current rotating speed of the fan; If the current rotating speed is greater than a first preset rotating speed, the fan frequency conversion controller acquires a current power of the fan and controls the fan according to the current rotating speed and the current power; If the current rotating speed is less than a second preset rotating speed, the fan frequency conversion controller acquires a current current of the fan and controls the fan according to the current rotating speed and the current current; Controlling the fan according to the current rotating speed and the current power, specifically, the fan frequency conversion controller determines a reference power and a first reference time length corresponding to the current rotating speed according to a first preset relationship table, and stops the fan when the current power is less than the reference power and the first reference time length is maintained, and sends first type fault information to the main controller; Controlling the fan according to the current rotating speed and the current current, specifically, the fan frequency conversion controller determines a reference current and a second reference time length corresponding to the current rotating speed according to a second preset relationship table, and stops the fan when the current current is greater than the reference current and the second reference time length is maintained, and sends second type fault information to the main controller; The first preset relationship table represents the corresponding relationship between the rotating speed greater than the first preset rotating speed and the reference power and the first reference time length, and the second preset relationship table represents the corresponding relationship between the rotating speed less than the second preset rotating speed and the reference current and the second reference time length.

Images