KR20120004275A - A control method of the washing machine - Google Patents

Abstract

PURPOSE: A control method of a laundry machine is provided to prevent the freezing of laundry and to accurately sense the freezing of laundry. CONSTITUTION: A controlling unit performs drainage in case the level of water in a water tank is greater than a set water level(S4). If water drainage time is greater than set time, the controlling unit compares the inner temperature of the laundry machine with a reference temperature(S7). If the inner temperature of the laundry machine is lower than the reference temperature, the controlling unit outputs a first error message(S8). The controlling unit stops the operation of the laundry machine.

Description

A control method of the washing machine

The present invention relates to a control method of a washing machine, and more particularly, to a control method of a washing machine that can accurately detect whether the washing machine freezes.

In general, a washing machine includes a water tank containing washing water, and a washing tank rotatably provided in the water tank to accommodate clothes and the like (hereinafter, referred to as 'foam'), and washing of the cloth is performed as the washing tank rotates.

The washing machine has a top loading type in which a washing tank is vertically provided so that the laundry can be fed from the upper side and rotates about a vertical axis, and the washing tank is horizontally provided so that the laundry can be fed from the front and rotates about the horizontal axis. It can be divided into front loading type.

The washing machine of the top-loading type can be largely classified into an agitator type and a pulsator type, and the stirring type washes by rotating a laundry rod towering in the center of the washing tank. The formed disk-shaped pulsator or washing tank is rotated to wash.

The front loading method is commonly referred to as a drum washing machine, and a lifter is provided on an inner circumferential surface of a drum constituting the washing tub, and the washing is performed by lifting and dropping the fabric by the lifter as the drum rotates.

As described above, there are various types of washing machines, but any one of the water supply apparatus for supplying the washing water to the water tank and / or the washing tank, and a drainage device for draining the washing water from the water tank after washing, rinsing and dehydrating Equipped.

In the conventional washing machine, when the washing water is frozen in an environment such as winter when the temperature of the outside air drops below zero, the washing machine may not accurately detect the washing machine, and thus the washing machine may not operate normally. In particular, the water supply device or the drainage device may freeze. Despite this problem, there was a problem of continuously trying to operate according to a preset algorithm.

An object of the present invention is to provide a control method of a washing machine to stop the operation of the washing machine in accordance with the freezing conditions set by reflecting the temperature inside the washing machine.

In addition, an object of the present invention is to provide a control method of a washing machine that can prevent the freezing of the washing machine in advance by allowing the user to immediately recognize when the temperature inside the washing machine is sensed below a predetermined level.

In addition, an object of the present invention is to provide a control method of a washing machine that can accurately detect whether or not frozen by several times depending on each step of operating the washing machine.

In the control method of the washing machine of the present invention, before the water is supplied, the step (a) of performing drainage when the water level in the reservoir is above the set level, and if the time taken to drain in the step (a) is more than the set time (B) comparing the temperature inside the washing machine with a reference temperature, and (c) outputting a first error message if the temperature inside the washing machine is lower than the reference temperature in the step (b).

Alternatively, the control method of the washing machine of the present invention, before supplying the washing water into the reservoir, if the water level in the reservoir is higher than the first set level set to determine whether the overflow has occurred (a) Step (b) and draining if the water level in the reservoir is higher than the second set level lower than the first set level after the step (a); (C) comparing the internal temperature of the washing machine with a predetermined reference temperature if the time taken for the predetermined time is greater than the predetermined drainage setting time; and if the internal temperature of the washing machine is lower than the predetermined reference temperature in the step (c), (D) outputting an error message.

Alternatively, the control method of the washing machine of the present invention, the step (a) of supplying the wash water into the reservoir, and after the wash water is supplied for the first water supply set time, if the water level in the reservoir is lower than the first water supply set water level (B) comparing the temperature inside the washing machine with a third reference temperature, and outputting a first error message if the temperature inside the washing machine is lower than the third reference temperature in step (b). do.

Alternatively, the control method of the washing machine of the present invention, before the water supply to the wash water, the step of performing drainage when the water is higher than the first set water level set to determine whether the overflow occurred in the reservoir (a) And (b) performing drainage when the water level in the reservoir is higher than the second set water level lower than the first set water level after the step (a), and washing water into the reservoir for a first water supply setting time. And a step of supplying water, wherein the step (a) compares the temperature inside the washing machine with a first reference temperature if the time taken to drain the wash water in the water storage tank is equal to or greater than a first drainage setting time, and compares the washing machine with the first reference temperature. If the internal temperature is lower than the first reference temperature, a first error message is output, and in step (b), the time taken to drain the wash water in the reservoir is short. When the drainage time is equal to or greater than the preset drainage time, the temperature inside the washing machine is compared with the third reference temperature, and when the comparison result shows that the temperature inside the washing machine is lower than the third reference temperature, the first error message is output. When the water level in the reservoir does not reach the predetermined water supply setting level within a predetermined water supply setting time, the temperature inside the washing machine is compared with a predetermined reference temperature, and when the temperature inside the washing machine is lower than the predetermined reference temperature, 1 Print an error message.

The control method of the washing machine of the present invention has the effect of accurately detecting whether or not frozen.

In addition, the control method of the washing machine of the present invention has an effect that can prevent the freezing in advance.

In addition, the control method of the washing machine of the present invention has the effect of accurately detecting whether the freezing by determining whether to freeze several times according to each step of operating the washing machine.

In addition, the control method of the washing machine of the present invention has the effect of accurately detecting that the water supply and / or drainage is frozen.

In addition, the control method of the washing machine of the present invention has the effect that it is possible to determine whether or not frozen before a predetermined stroke of washing, rinsing, dehydration, and the like.

1 is a perspective view showing a washing machine according to an embodiment of the present invention.
2 is a side cross-sectional view of the washing machine shown in FIG.
3 is an enlarged view of a portion of the bottom of the reservoir illustrated in FIG. 2.
4 is a block diagram illustrating a control configuration of a washing machine according to an embodiment of the present invention.
5 illustrates a control method of a washing machine according to an embodiment of the present invention.
6A, 6B, and 6C are flowcharts illustrating a control method of a washing machine according to another embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

1 is a perspective view showing a washing machine according to an embodiment of the present invention. 2 is a side cross-sectional view of the washing machine shown in FIG. 3 is an enlarged view of a portion of the bottom of the reservoir illustrated in FIG. 2.

1 to 3, a washing machine according to an embodiment of the present invention includes a cabinet 1 forming an exterior of a washing machine, operation keys for receiving various control commands from a user, and information on an operating state of the washing machine. And a control panel 7 having a display for displaying and providing a user interface.

The cabinet 1 has a cabinet main body 2 which forms a space for accommodating various components of the washing machine therein, and a central portion is opened to cover the upper side of the cabinet main body 2 so that the fabric is allowed to enter and exit, thereby forming a discharge hole 3a. It includes a top cover (3).

The top cover 3 is rotatably provided with a door 40 so as to open and close the discharge hole 3a, the door 40 is formed of a transparent member such as tempered glass so that the inside of the cabinet body 2 can be seen It may include a glass 40b and a door frame 40a on which the glass 40b is mounted.

In addition, the washing machine according to an embodiment of the present invention is a washing tank containing the wash water and suspended in the cabinet (1) by the support member 15, the laundry tank in which the laundry is put and rotatably provided in the reservoir (4) (6) and a pulsator (9) rotatably provided in the lower portion of the washing tank (6). The upper part of the water storage tank 4 is provided with a water tank cover 14 having an approximately central portion opening to allow the bag to enter and exit, and the upper portion of the washing water tank 6 has a balancer 12 for compensating for the eccentricity generated when the washing water tank 6 is rotated. ) May be provided.

The drive unit 8 provides a driving force for rotating the washing tank 6 and / or the pulsator 9. The drive unit 8 selectively transmits the rotation of the motor 8a that generates the rotational force, the drive shaft 8b rotated by the motor 8a, and the drive shaft 8b, so that only the washing tank 6 is rotated, or the pulsator Only 9 may be rotated, or may include a clutch (not shown) to allow the washing tub 6 and the pulsator 9 to rotate simultaneously.

The top cover 3 is provided with a detergent box 32 for receiving detergent, and washing water introduced from an external water source such as a faucet through the water supply hose 11 is passed through the water supply passage 13 to the detergent box 32. You are guided. A water supply valve 12 for controlling the water supply passage 13 is provided.

When the water supply valve 12 is opened, the washing water introduced through the water supply hose 11 is guided to the detergent box 32 through the water supply passage 13. The detergent box 32 accommodates various additives such as a detergent for removing contamination of the fabric, a fabric softener for flexibly treating the fabric tissue, and a bleach agent for bleaching the fabric, and includes a detergent, a fabric softener and / or a bleach agent. It may comprise a plurality of receiving sections partitioned for separate accommodation. In particular, a plurality of water supply passages for selectively supplying the wash water to the respective receiving portions at a suitable time according to the washing process and a plurality of water supply valves for controlling each of the water supply passages may be provided. It is controlled by the controller (Figs. 4, 72) to be described later in accordance with the washing process in progress. Typically, the water supply valve 12 is implemented as a solenoid valve to control the water supply flow passage 13 in accordance with the applied current.

A drain 24 and a pump 24 provided on the drain passage 25 for draining the wash water in the reservoir 4 to the outside of the washing machine, and the wash water pumped by the pump 24 to the outside of the washing machine. Drain hose 27 may be provided.

Meanwhile, a heater 74 may be provided at a lower portion of the reservoir 4, and as shown in FIG. 3, a heater accommodating portion may form a predetermined space for accommodating the heater 74 in the lower portion of the reservoir 4. (Not shown) may be formed, and a heater cover 71 covering an upper side of the heater accommodating part may be provided.

The heater cover 71 may be provided with a hole 71h so that the washing water in the water reservoir 4 may be drained, and the drain receiving hole 26 may be formed in the heater accommodating part so that the washing water may be drained to the drainage passage 25. Can be formed.

Meanwhile, the temperature sensor 73 may be provided at a position adjacent to the heater 74. The temperature sensor 73 measures the temperature of the washing water or the air temperature according to the level of the washing water stored in the water storage tank 4.

Hereinafter, in the description of the washing machine control method and the washing machine of the present invention, it will be apparent that the temperature sensed by the temperature sensor 73 will be the temperature of the medium in contact with the temperature sensor 73. If the wash water above a predetermined level is stored and the temperature sensor 73 is immersed in the wash water, it will be the temperature of the wash water, otherwise it will be the temperature of the air. In addition, in the case where the temperature sensor 73 measures the temperature of the wash water or the temperature of the air, the temperature sensor 73 will be said to sense the temperature inside the washing machine, the detected value is It will be obvious that this will depend on the temperature of the place where it is installed. The same will be said for the washing machine in which the temperature sensor 73 is provided in a different manner from the present embodiment, but the idea of the present invention reflects the environmental factors in which the washing machine operates (for example, outside air temperature during the winter season). The present invention is to detect the temperature of the medium and to accurately detect water supply or drainage due to freezing, or to predict the possibility of poor water supply or drainage, and if the detected value varies depending on the environmental factors, The configuration of the temperature sensor may vary within.

Referring to FIG. 4, the input unit 77 receives various control commands for the overall operation of the washing machine from the user. The washing unit, washing time, reservation setting, etc. are provided through various operation keys provided in the control panel 7. Receive control command of.

The display unit 75 displays the state information on the overall operation of the washing machine so that the user can recognize the display. The display unit 75 displays a running stroke, a required time or remaining time of each stroke, and displays a command input through the input unit 77. And so on. Usually, it displays through a display, such as LCD or LED provided in the control panel 7.

The controller 72 controls the washing machine to operate according to a control command input through the input unit 77. More specifically, the control unit 72 controls the water supply valve 12, the display unit 75, the pump 24, the drive unit 8 and / or the heater 74, the temperature sensor 73 and / or water level sensor The output of the display unit 75 may be controlled or the water supply valve 12, the pump 24, and / or the heater 74 may be controlled according to the result detected by the 76.

5 illustrates a control method of a washing machine according to an embodiment of the present invention.

Referring to Figure 5, the control method of the washing machine according to an embodiment of the present invention detects the water level in the reservoir (4) before supplying the washing water (S1). In the step S1 it is possible to detect the water level through the water level sensor 76.

The controller 72 compares the water level detected in step S1 with the set water level (S2), and if the detected water level is lower than the set water level, water is supplied, and then the washing, rinsing, and dehydration are performed. (S3). In step S3, the control unit 72 may control the water supply valve 12 so that the water supply is made.

On the other hand, when the water level detected in the step S2 is higher than the set water level, the control unit 72 operates the pump 24 to drain the wash water (S4), thereafter, by the water level sensor 76 in the reservoir (4) When the water level is continuously detected and the water level in the water reservoir 4 is sufficiently reduced before the drainage set time elapses (S5), the control unit 72 opens the water supply valve 12 to supply the washing water into the water storage tank 4. And washing, rinsing, and dehydration are performed (S3).

On the contrary, when the water level in the water reservoir 4 is not sufficiently reduced in step S5 and the drainage setting time has elapsed, the control unit 72 detects the temperature through the temperature sensor 73 (S6) and uses the detected temperature as a reference temperature. In comparison with (S7), when the detected temperature is lower than the reference temperature, the first error message is output through the display unit 75 (S8), and when the detected temperature is higher than the reference temperature, the display unit 75 Output a second error message via.

On the other hand, if sufficient drainage is not made even after the drainage setting time has elapsed in step S4 (S5), freezing occurs in the drain including the drain passage 25, the pump 24, and / or the drain hose 27. Therefore, it may be assumed that either the case where drainage is not normally performed (first error message output) or when a failure occurs in the pump 25 (second error message output).

Steps S6 to S7 are for indicating which of the two cases, and if it is determined in step S7 that the temperature detected in step S6 is lower than the reference temperature, the washing machine operates in a low temperature environment such as winter. Can be seen, and the controller 72 causes the first error message to be output so that the user can recognize that the freezing has occurred in the drain. The reference temperature is a value set by an experiment and will be referred to as a value that can be predicted with considerable accuracy that freezing has occurred when residual water is present in the washing machine. Preferably, the reference temperature is set to a subzero value.

On the contrary, if it is determined in step S7 that the temperature sensed in step S6 is higher than the reference temperature, the residual water in the washing machine is very unlikely to freeze. Therefore, the control unit 72 pumps the pump 24 because of insufficient drainage. ) And a second error message is output through the display unit 75 so that the user can recognize the failure and the blockage of the drainage passage 25 or the drainage hose 27.

On the other hand, in the present embodiment, the reason for performing the step S2 before the operation intermediate water of the washing machine is made, if the washing water is present in the water storage tank 4 before the water for washing or rinsing, it is determined whether to use the frozen To this end, when it is detected that the freezing has occurred by preventing the water supply of the wash water afterwards, there is an effect that can prevent unnecessary water supply in advance.

The control unit 72 controls the operation of the washing machine to stop with the output of the corresponding error message in step S8 or S9, and the process remaining by the user's specific operation or the output of the error message as a release condition is preferably performed. Do.

6A, 6B, and 6C are flowcharts illustrating a control method of a washing machine according to another embodiment of the present invention.

The washing machine according to another embodiment of the present invention determines whether an overflow occurs by comparing the water level in the water storage tank 4 with the first set water level after power is applied to the washing machine, and performs drainage according to the determination result. The first set of freezing through the series of flows shown in FIG. 6A, and the water level in the reservoir 4 is compared with the second set water level to perform drainage when the water level is greater than or equal to the second set water level. Judging whether or not the second freezing through the flow and the third freeze through the series of flows shown in Figure 6c after supplying the wash water into the reservoir (4) for the administration of washing, rinsing, dehydration, etc. As a result, it is possible to accurately determine whether the washing machine is frozen.

Hereinafter, the first freeze determination process will be described in detail with reference to FIG. 6A.

When the power is applied and operation of the washing machine starts (S11), the water level in the reservoir 4 is detected by the water level sensor 76, and the overflow in the reservoir 4 is compared by comparing the detected value with the first set level. It is determined whether it has occurred (S12). The reason for performing this process is to detect whether the washing water in the reservoir 4 is filled by the special circumstances that occurred before the washing machine is operated, and the amount exceeds the predetermined level and overflows the reservoir 4. For example, when the water supply valve 12 has an abnormality and wash water is continuously supplied into the water storage tank 4 even when the washing machine is turned off. Accordingly, it is preferable that the first set water level is set in consideration of the water level overflowing from the water reservoir 4.

If it is determined in step S12 that the water level in the reservoir 4 is higher than the first set level, the controller 72 causes the third error message to be output through the display unit 75 (S13). The third error message is a message output so that the user can recognize that an overflow has occurred.

Thereafter, the controller 72 operates the pump 24 to drain the washing water in the reservoir 4 (S14), and when the water level in the reservoir 4 becomes lower than the second set level within a predetermined time (S15). The third error message is turned OFF (S16), and the second set water level is preferably set to an air supply level in which the washing water in the water reservoir 4 is drained. Hereinafter, it will be described that the second set water level is an air level.

On the other hand, when the water level in the reservoir 4 does not reach the second set level in step S15, the pump 24 is continuously operated, and the water level in the reservoir 4 is increased until the drainage time reaches the first value set time. When the second set water level is not reached (S17), the controller 72 compares the temperature sensed by the temperature sensor 73 with the first reference temperature (S18), and as a result, the detected temperature is the first reference temperature. When it is determined that the temperature is lower than the display unit 75 displays the first error message, and when the detected temperature is determined to be higher than the first reference temperature, the display unit 75 outputs the second or third error message. (S20).

Hereinafter, the second freeze determination process will be described in detail with reference to FIG. 6B.

The second freeze determination process is performed under the condition that the water level in the reservoir 4 is lower than the first set water level. That is, when it is determined that the water level detected by the water level sensor 76 is lower than the first set water level in step S12 or through the steps S12, S13, S14, S15, and S16, the water level in the reservoir 4 becomes the second set water level. If lower, it is to determine whether or not frozen in the subsequent process.

The second freezing determination process includes comparing the temperature sensed by the temperature sensor 73 with the second reference temperature (S21). If the sensed temperature is less than or equal to the second reference temperature in step S21, the controller 72 controls the first error message to be output through the display unit 75 (S22).

The water level in the reservoir 4 in step S21 may be equal to or less than the first set level (if possible when entering S21 immediately after S12) or below the second set level (this is S13, S14, S15, For example, if the water level of the reservoir 4 becomes the air level after performing S16 in sequence.). If the water level of the reservoir 4 is higher than the second set water level and lower than the first set water level, the temperature sensor 73 will sense the temperature of the wash water in the reservoir 4. On the other hand, if the water level of the reservoir 4 is lower than the second set water level (for example, the air level), the temperature sensor 73 will detect the temperature of the air inside the washing machine. The second reference temperature is preferably set to a subzero value in consideration of the freezing point of the wash water, and may be set below the below zero degree considering the case where the temperature of the air is sensed by the temperature sensor 73.

If it is determined in step S21 that the temperature sensed by the temperature sensor 72 is lower than the second reference temperature, the controller 72 determines that the temperature inside the washing machine is low enough to freeze, and immediately changes the display unit 75. Through the first error message is output (S22). Whether to detect the freezing by performing the S21 and S22 is to determine or predict whether to freeze based on the detection value by the temperature sensor 73 irrespective of the drainage characteristics of the wash water, the sequence shown in Figure 6b The present invention is not limited thereto and may be performed at any point in the washing machine operation process.

In particular, in step S21, if the temperature sensed by the temperature sensor 73 is less than the second set temperature, it can be predicted with sufficient accuracy that the components of the washing machine, for example, the water supply valve 12 or the pump 24, will be frozen. Preferably, the second set temperature is set to an appropriate value by experiment.

Meanwhile, when it is determined in step S21 that the temperature sensed by the temperature sensor 73 is higher than the second reference temperature, the controller 72 compares the level detected by the level sensor 76 with the third set level (S23). ).

When the detected water level is higher than the third set level, it means a case in which the washing water having a third level or more and a first set level or less exists in the reservoir 4, in which case the controller 72 operates the pump 24. When the drainage is performed (S25), the drainage is performed during the second drainage setting time, and when the water level change value in the reservoir 4 is equal to or more than the reference value (S26), it is determined that drainage is normally performed, and the amount of water is detected (S24). In step S26, if the water level change value is less than the reference value despite the second drainage time elapsed (S27), the temperature detected by the temperature sensor 73 is compared with the third reference temperature (S28), and the controller 72 ) Controls the first error message to be output through the display unit 75 when the detected temperature is lower than the third reference temperature (S29), and displays the display unit 75 when the detected temperature is higher than the third reference temperature. Via the second error message Controls such that the output magazine (S30).

The third freeze determination process may be performed under the condition that the water level in the reservoir 4 is lower than or equal to the third set water level, and may be performed after the quantity detection step S24 shown in FIG. 6B.

When the amount of water in the washing tank 6 is detected in step S24, the pattern of each stroke, such as washing, rinsing, and dehydration, which is performed subsequently, is determined according to the detected amount of water.

The water supply (S31) is a step of watering the wash water into the reservoir (4), the amount of wash water is also set according to the amount of water detected in step S24.

After the water supply starts in step S31, when the first water supply setting time has elapsed (S32) to determine whether the water supply is normal, the step S33 of comparing the water level of the water reservoir 4 with the first water supply setting water level, The controller 72 determines that the water supply is normally performed when the water level detected by the water level sensor 75 is equal to or greater than the first water supply setting level, and after the second water supply setting time has elapsed (S34), the water level in the reservoir 4 is restored to the second level. Compared with the water supply setting level (S38). Here, the first water supply set water level refers to a water level that is expected to be reached when normal water supply is performed during the first water supply set time, and the second water supply set water level is a target water supply into the reservoir 4 according to the detected quantity in step S24. It means water level.

On the other hand, if it is determined in step S33 that the water level in the reservoir 4 does not reach the first water supply setting level, the controller 72 compares the temperature sensed by the temperature sensor 73 with the fourth reference temperature (S35). In contrast, when the detected temperature is lower than the fourth reference temperature, the display unit 75 controls the first error message to be displayed. On the contrary, when the detected temperature is higher than the fourth reference temperature, the fourth error message is controlled. Control the output. Here, the fourth error message is a message for notifying the user that water supply is not normally performed due to a failure of the water supply valve 12 or the like.

Meanwhile, even when the water level detected by the water level sensor 76 in step S38 does not reach the second water supply setting level, the control unit 72 may control the display unit 75 to display the fourth error message (S39). ).

On the contrary, if the water level detected by the water level sensor 76 in step S38 is higher than the second water supply setting level, water supply is normally performed. Then, the control unit 72 performs the first washing (S40) and the heater by a preset algorithm. Operation 74 is performed to wash the washing water in the reservoir 4 by heating (S41), second washing (S42), and drainage (S43). Here, the washing tank 6 and / or the pulsator 9 rotate in the first washing operation S40 and the second washing operation S43, and the drainage S43 is performed by the pump 24.

If the water level in the reservoir 4 does not reach the drainage completion level even after the drainage S43 is made for the third drainage set time (S49), the control unit 72 displays the second error message through the display unit 75. Control as possible.

On the contrary, if it is determined that the water level in the water reservoir 4 is less than the drainage completion level in step S43, the drainage is normally performed. Operation of the washing machine is completed by turning off the power (S48) of the washing machine.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

Claims (15)

(A) performing draining when the water level in the reservoir is higher than or equal to the set water level before supplying the wash water;
(B) comparing the temperature inside the washing machine with a reference temperature when the time taken for draining in the step (a) is greater than or equal to a set time; And
And (c) outputting a first error message when the temperature inside the washing machine is lower than the reference temperature in the step (b). The method of claim 1,
The step (a)
And performing drainage when the water level in the water reservoir is higher than the first set water level set to determine whether an overflow occurs before the stroke of the washing machine is started. The method of claim 2,
The step (b)
(B-1) comparing the temperature inside the washing machine with the first reference temperature when the water level in the reservoir does not reach the second set level until the first drainage set time elapses in the step (a-1). Including,
The step (c)
And controlling the washing machine to output the first error message when the temperature inside the washing machine is lower than the first reference temperature in the step (b-1). The method of claim 2,
Step (a-1),
Outputting a second error message when the level in the reservoir is higher than the first set level; And
And stopping the output of the second error message when the water level in the reservoir reaches the second set level before the first drainage set time has elapsed. The method of claim 4, wherein
The second error message is
The control method of the washing machine is a message indicating that the overflow occurred in the reservoir. The method of claim 1,
The first error message is
The control method of the washing machine is a message indicating that the drainage portion for draining the washing machine in the reservoir to the outside is frozen. (A) performing draining if the water level in the reservoir is higher than a first set water level set to determine whether an overflow has occurred before water is supplied into the reservoir;
(B) performing draining when the water level in the reservoir is higher than the second set water level lower than the first set water level after the step (a);
(C) comparing the temperature inside the washing machine with a predetermined reference temperature when the time taken for draining up to a predetermined water level in step (b) is greater than a predetermined drainage setting time; And
And (d) outputting a first error message if the temperature inside the washing machine is lower than the predetermined reference temperature in the step (c). The method of claim 7, wherein
In the step (c),
And a third error message if the temperature inside the washing machine is higher than the predetermined reference temperature. (A) watering the wash water into the reservoir;
(B) comparing the temperature inside the washing machine with a third reference temperature if the water level in the reservoir is lower than the first water supply set level after the washing water is supplied for a first water supply set time; And
And (c) outputting a first error message when the temperature inside the washing machine is lower than the third reference temperature in the step (b). The method of claim 9,
In step (b),
And a fourth error message if the temperature inside the washing machine is higher than the third reference temperature. The method of claim 10,
The fourth error message is
The control method of the washing machine is a message indicating that the water supply unit for supplying the wash water into the reservoir does not operate normally. The method according to any one of claims 1, 7, and 9,
Sensing a temperature inside the washing machine and outputting a first error message if the sensed temperature is lower than the second reference temperature. (A) before draining the wash water into the reservoir, if drainage is higher than a first set water level set to determine whether an overflow occurs in the reservoir;
(B) performing draining when the water level in the reservoir is higher than the second set water level lower than the first set water level after the step (a); And
(C) supplying the wash water for a first water supply setting time into the reservoir,
The step (a)
If the time taken to drain the wash water in the water storage tank is equal to or greater than the first drainage setting time, the temperature inside the washing machine is compared with the first reference temperature. If the temperature inside the washing machine is lower than the first reference temperature, the first error message is displayed. Output
The step (b)
When the time taken to drain the wash water in the water storage tank is greater than or equal to the second drainage setting time, the temperature inside the washing machine is compared with a third reference temperature, and as a result of the comparison, the first error when the temperature inside the washing machine is lower than the third reference temperature. Print a message,
The step (c)
When the water level in the water reservoir does not reach the predetermined water supply setting level within a predetermined water supply setting time, the temperature inside the washing machine is compared with a predetermined reference temperature, and if the temperature inside the washing machine is lower than the predetermined reference temperature, The control method of the washing machine to output a first error message. The method of claim 13,
Sensing the temperature inside the washing machine, and outputting the first error message if the sensed temperature is lower than the second reference temperature. The method according to any one of claims 1, 7, 9 and 13,
The temperature of the washing machine control method of the washing machine is sensed by the temperature sensor provided in the reservoir.

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