TW202210682A - Drum-type washing machine - Google Patents

Abstract

This drum-type washing machine comprises a water tank, a rotary drum, a motor, a water supplying part, a water discharging part, a drainage port, an overflow port, and a control part. The control part controls the water supplying part to supply water into the water tank, then performs a first step, controls the water discharging part to discharge water inside the water tank from the drainage port, controls the water supplying part to supply water into the water tank again, and then performs a second step. The first step is a step in which the motor is controlled to rotate the rotary drum in a first rotational direction at a rotational speed at which water inside the water tank is raised to the height of the overflow port. The second step is a step in which the motor is controlled to rotate the rotary drum in a second rotational direction opposite to the first rotational direction. The first rotational direction is a direction in which the lower part of the rotary drum heads toward the overflow port.

Description

Front-loading washing machine

The present disclosure relates to a front-loading washing machine, in particular, to the maintenance of the so-called washing tub.

Patent Document 1 discloses a washing machine having a tank washing course. The washing machine is provided with: a water tank; a rotating tank, which is rotatably accommodated in the water tank; and a driving mechanism for rotating the rotating tank. The tank cleaning process is performed by combining the first process and the second process. The first step is a step of rotating the rotating tub at a first rotational speed with water added to the water tub at a water level higher than the water level in the washing step of the laundry course. In addition, the second step is a step of rotating the rotation tank at a second rotation speed higher than the first rotation speed, and the centrifugal force acting on the water adhering to the rotation tank is larger and lower than gravity at the resonance point.

The rotation direction at the second rotation speed is only one direction, and the rotation direction is set so that water splashed from the rotation tank during rotation of the rotation tank is less likely to flow into the drying air passage above the water tank. prior art literature Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 2016-43171

The present disclosure provides a drum-type washing machine that can efficiently remove the dirt on the inner surface of the water tank and the inner and outer surfaces of the rotating tank in a short time without using a tank cleaning agent, and keep the water tank and the rotating tank clean more easily .

The drum-type washing machine in the present disclosure includes a water tank, a rotary tank, a motor, a water supply unit, a drain unit, a drain port, an overflow port, and a control unit. The sink holds water. The rotation tank is rotatably arranged in the water tank. The motor is the member used to drive the rotating slot. The water supply part is a member for supplying water to the water tank. The drain part is a member for draining the water in the water tank. The water outlet is arranged at the lower part of the sink. The overflow port is arranged at the upper part of the water tank than the drain port. After the control unit controls the water supply unit to supply water to the water tank, the first step is performed, and the control unit controls the drain unit to discharge the water in the water tank from the drain port, and controls the water supply unit to supply water to the water tank again, and then performs the first step. 2nd process. The first step is a step of controlling the motor to rotate the rotation tank in the first rotation direction at a rotational speed at which the water in the water tank can rise to the height of the overflow. The second step is a step of controlling the motor to rotate the rotation tank in a second rotation direction opposite to the first rotation direction. In addition, the first rotation direction is a direction in which the lower part of the rotation tank faces the overflow side.

The drum type washing machine of the present disclosure does not need to use tank cleaning agent, can effectively remove the dirt on the inner surface of the water tank and the inner and outer surfaces of the rotating tank in a short time, and keep the water tank and the rotating tank clean more easily.

Form for carrying out the invention (knowledge and insights that form the basis of this disclosure, etc.) At the time when the inventors thought of the present disclosure, as a conventional washing machine, there was known a washing machine having a tank cleaning course in which a tank cleaning agent was put into a water tank, and it took about 3 hours to wash it reliably. 's itinerary. However, the conventional washing machine cannot be used every day because the operation time of the tank cleaning process is very long. As a result, the frequency of maintenance performed by the tank cleaning process is reduced, which promotes the accumulation and fixation of dirt in the water tank. subject.

In addition, in the daily maintenance, it is not necessary to use a tank cleaner, and only water is sufficient, but the user cannot perform the maintenance on a daily basis for the above-mentioned reasons. Therefore, maintenance is performed at a frequency of, for example, once every three months. As a result, in order to remove the accumulated and solidified contamination in the water tank, it is necessary to purchase a tank cleaner or the like. In addition, when using tank cleaning agent, it is also necessary to rinse the tank, which cannot avoid the increase of maintenance time and the increase of water consumption.

On the other hand, in order to allow users to easily perform maintenance, it is also possible to manually set "washing time 1 minute, no rinsing, spin drying time 1 minute" in the standard course for washing clothes. . However, in this standard stroke, the water tank cannot be cleaned sufficiently because the water level or the rotation speed of the rotating tank is not as high as that in the tank cleaning stroke.

In addition, in the cleaning step of the tank cleaning process, once water is supplied to the water tank, the water is not drained, and the cleaning is continued for a long period of time, such as 2 hours. Therefore, there are also disadvantages such as the contamination that peeled off the surface of the water tank or the rotating tank and re-adhering to other places in the water tank, and at the same time, there are also problems such as abnormal foaming of the detergent residue accumulated in the water tank due to long-term washing. .

The inventors have found such a problem, and in order to solve the problem, the subject of the present disclosure is finally constituted.

Therefore, the present disclosure provides a drum that can efficiently remove the contamination on the inner surface of the water tank and the inner and outer surfaces of the rotating tank in a short time without using a tank cleaning agent, and keep the water tank and the rotating tank clean more easily type washing machine.

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed descriptions than necessary are sometimes omitted. For example, the detailed description of well-known matters may be omitted, or the repeated description of substantially the same configuration may be omitted. This is to prevent the following description from becoming unnecessarily long so as to be easily understood by those skilled in the art.

In addition, the attached drawings and the following descriptions are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the scope of the application. (Embodiment 1)

Hereinafter, Embodiment 1 will be described with reference to FIGS. 1 to 3C . [1-1. Composition]

First, the structure of the drum-type washing machine 10 will be described using FIG. 1 . FIG. 1 is a side sectional view of the drum-type washing machine 10 . In addition, below, as shown in FIG. 1, the vertical direction in the state which installed the drum type washing machine 10 may be described as an up-down direction. Moreover, in the state which installed the drum type washing machine 10 as shown in FIG. 1, the side where the cover body 37 exists may be described as the front or the front, and the side where the motor 35 exists may be described as the back or the rear.

As shown in FIG. 1 , the drum type washing machine 10 includes a water tank 33 , a rotary drum 31 , a motor 35 , a water supply valve 44 , a water level detection unit 46 , a drain valve 43 , a drain port 40 , an overflow port 60 , and a control unit 57 . The water level detection unit 46 is composed of an air trap 46a and a pressure sensor 46b, and detects the water level in the water tank 33 . In addition, the rotary drum 31 corresponds to an example of the rotation tank in this disclosure, the water supply valve 44 corresponds to an example of the water supply part in this disclosure, and the drain valve 43 corresponds to an example of the drain part in this disclosure.

The water tank 33 of the front-loading washing machine 10 is supported by the suspension 41a above the washing machine body 39 and the anti-vibration member 41b below to be vibrated and supported so as to be able to swing, and is configured to store water (hereinafter, also referred to as "wash water"). .

The rotary drum 31 is rotatably installed in the water tank 33, and the rotation center axis is inclined downward from the front side toward the back side, and is arranged. In addition, although the rotary drum 31 here is arrange|positioned so that the rotation center axis may be inclined downward from the front side toward the back surface side, you may arrange|position so that the rotation center axis may become horizontal. The rotary drum 31 is formed in a bottomed cylindrical shape, and a large number of water passage holes 32 are provided on the entire surface of the outer peripheral portion. A plurality of protrusions 36 are provided on the inner wall surface of the rotary drum 31 for stirring the clothes. The opening part 38 is provided in the front side of the water tank 33 and the rotary drum 31, and the opening part 38 is covered by the cover body 37 so that it can open and close freely. The user can take out the laundry through the opening 38 and put it into the rotary drum 31 by opening the cover 37 .

The water supply valve (water supply portion) 44 is a member for supplying water into the water tank 33 through the water supply path 45 .

The control unit 57 is arranged below the washing machine body 39 . The control unit 57 controls the water supply valve 44 to supply water into the water tank 33, and then performs the first step, and controls the drain valve 43 to discharge the water in the water tank 33 from the drain port 40, and controls the water supply valve 44 to make After water is supplied to the water tank 33 again, the second step is performed. The details of the first step and the second step will be described later. In addition, the control unit 57 has a computer system including a processor and a memory. Furthermore, by causing the processor to execute the program stored in the memory, the computer system functions as the control unit 57 . Although the program executed by the processor is set to be pre-recorded in the memory of the computer system, it can also be provided in a non-temporary recording medium such as a memory card, or via a telecommunication line such as the Internet. .

In addition, one end of the drainage path 42 is connected to the drain port 40 provided in the lower part of the water tank 33 , and the other end of the drainage path 42 is connected to a drain valve (drainage portion) 43 for draining the water in the water tank 33 . Components for washing water drainage.

A rotating shaft 34 is provided on the back surface of the rotary drum 31 , and a motor 35 attached to the back surface of the water tank 33 is connected to the rotating shaft 34 . The motor 35 is constituted by a DC brushless motor or the like, and is a member for driving the rotating drum 31 . The motor 35 is controlled by the control unit 57 and the drive circuit (not shown) to be able to rotate forward/reversely and the number of rotations can be changed, and is detected by the signal from the current detection circuit (not shown) The load on the motor 35, that is, the amount of laundry.

The control part 57 receives the information from the input setting part 58 for setting an operation course etc. by a user as an input, and displays the content corresponding to the input information by the display part 59, and notifies a user. In addition, after the start of operation is set by the input setting unit 58, the control unit 57 receives data from the water level detecting unit 46 and the like composed of the air collector 46a and the pressure sensor 46b in order to detect the water level in the water tank 33. As an input, the following control is performed. That is, the control part 57 controls the operation|movement of the drain valve 43, the water supply valve 44, etc. through the load drive part (not shown) based on this input data. Moreover, the control part 57 controls the motor 35 through a drive circuit (not shown), and performs the operation|movement of a series of processes, such as washing, rinsing, dehydration, and drying.

Moreover, the drum-type washing machine 10 has a drying function, and is provided with the heater 47, the blower fan 48, and the warm air blowing path 49, thereby realizing the drying function. Specifically, in the drum type washing machine 10 , the warm air inlet 52 for introducing air into the water tub 33 is provided in front of the upper surface of the water tub 33 , and the warm air blowing port 51 is provided above the back surface of the water tub 33 . Then, the drum type washing machine 10 causes the warm air to flow into the water tub 33 and the rotary drum 31 in the direction b of the hot air, and heats and circulates the air in the rotary drum 31 and the water tub 33 to dry the laundry.

An overflow port 60 (eg, water level height of 160 mm) is formed on the side surface of the water tank 33 at a position slightly lower than the lower end (eg, water level height of 170 mm) of the opening 38 of the water tank 33 . That is, the overflow port 60 is provided above the water tank 33 than the drain port 40 . The overflow port 60 is connected to one end of the overflow channel 61 on the side surface of the water tank 33 , and the other end of the overflow channel 61 is connected to the outside of the machine downstream of the drain valve 43 .

In addition, the front-loading type washing machine 10 is configured to include a circulation pump 80 that communicates with the drainage port 40 through the drainage path 42, and the circulation path 81 that communicates with the circulation pump 80 communicates with the circulation port 82 in the front lower part of the water tank 33 to The washing water in the washing step is circulated like the flow a of the washing water. [1-2. Action, role]

With regard to the drum-type washing machine 10 configured as described above, the operation and effect of the maintenance course in a shorter time period than the conventional tank washing course will be described with reference to FIGS. 2 to 3C . FIG. 2 is a flowchart showing the operation of the maintenance course of the drum type washing machine 10 . 3A and 3B are front views schematically showing portions of the water tub 33 and the rotary drum 31 of the drum-type washing machine 10 in the first step. 3C is a front view schematically showing a portion of the water tub 33 and the rotary drum 31 of the drum-type washing machine 10 in the second step.

Since the tank cleaning process removes the detergent residue or dirt that has accumulated in the water tank 33 or the inside and outside of the rotary drum 31 and adhered, the operation time is generally as long as 3 hours or 12 hours. In addition, the cleaning time is 2 hours or 11 hours respectively, which accounts for most of the operation time, and the rest is the washing process, the dehydration process, and the like.

In addition, in order to enhance the cleaning effect, the user throws the tank cleaning agent into the rotating drum 31 . Since this tank cleaner contains many surfactants or bleaching components, it requires more rinses (eg, 4) than a standard cycle for washing clothes (eg, 2).

In addition, the cleaning time of the tank cleaning process is longer than the cleaning time of the standard process (for example, about 9 minutes) as described above, and the tank cleaning agent contains many various cleaning components as described above. Therefore, the tank cleaning process The foaming in the cleaning process of , will become very large compared to the standard stroke. This is also one of the main reasons why many flush cycles are required during the tank cleaning stroke.

As described above, the conventional tank cleaning process cannot be used every day due to its extremely long operation time. As a result, the frequency of maintenance performed by the tank cleaning process is reduced, which promotes the accumulation and fixation of dirt in the water tank. In addition, in the daily maintenance, it is not necessary to use a tank cleaner, and only water is sufficient, but the user cannot perform the maintenance on a daily basis for the above-mentioned reasons. Therefore, maintenance is performed by a tank cleaning course at a frequency of, for example, once every 3 months, and as a result, inconvenience such as having to purchase tank cleaning agent for use and the like is caused.

Therefore, it would be very useful for the user if there is a maintenance course whose operation time is short and can be easily used for daily maintenance without using a tank cleaner. In addition, in addition to daily maintenance, there are cases in which users feel that they want to perform special maintenance operations. In this case, for example, after washing operation of clothes with a lot of sludge, after washing operation of toilet mat, and after washing and drying operation (a lot of lint remains in the tank). This is due to the following reasons: In these cases, since there was too much dirt in the previous washing operation, a part of the dirt remained in the water tank 33, and the user felt that it was reattached to the clothes in the next washing operation. of unease. Moreover, as another case, before the washing operation of the baby clothes, etc. are mentioned. This is because, in this case, before washing the clothes (baby clothes) to be cleaned especially, the user feels that he wants to make the inside of the water tank 33 clean again just in case.

As shown in FIG. 2 , when the maintenance course operation is started (step S100 ), the control unit 57 opens the water supply valve 44 to start supplying water to the water tank 33 (step S101 ). Next, the control part 57 determines whether the water level in the water tank 33 has reached the 1st predetermined water level based on the output of the pressure sensor 46b (step S102). The control unit 57 continues to supply water until the water level in the water tank 33 reaches the first predetermined water level (step S102: NO), and after reaching the first predetermined water level (step S102: Yes), closes the water supply valve 44 to stop water supply (step S103) . The processing from steps S101 to S103 takes about one minute. Here, the first predetermined water level is set higher than the water level (for example, water level height of 60 mm) in the course of washing general laundry, and lower than the overflow port 60 (for example, water level height of 160 mm) (for example, water level height of 90 mm) ).

In addition, the control part 57 may rotate the rotary drum 31 (for example, rotation speed 35r/min) in this water supply process (processing of step S101 - step S103), or may drive the circulation pump 80. With this configuration, the drum-type washing machine 10 can promote the washing of the inside of the water tub 33 , the inside and outside of the rotary drum 31 , or the inside of the circulation path 81 .

In addition, the control unit 57 may be configured to perform the drain operation by driving the drain valve 43 for only a predetermined time before step S101. This is because there is a possibility that water may remain in the water tank 33 or the drain path 42 when the user turns off the power during the rinsing or the final spin during the previous washing operation. The tank cleaning operation is performed in a state where the water remains.

Next, the control part 57 performs a 1st process (step S200). The first step is a step of controlling the motor 35 to rotate the rotary drum 31 in the first rotational direction at a first rotational speed at which the water in the water tank 33 can rise to the height of the overflow port 60 . Specifically, the control unit 57 starts the rotation of the rotary drum 31 at the first rotation speed (for example, 80 r/min) and the first rotation direction by the motor 35 (step S201 ). In addition, the first rotation speed is higher than the rotation speed (for example, 45 r/min) of a course of washing general laundry. Thereby, the water in the water tank 33 is stirred, and the dirt adhering to the inside of the water tank 33 and the inside and outside of the rotary drum 31 is easily dropped. In addition, by stirring the detergent residue remaining in the water tank 33, even if the tank detergent is not put in, foaming is slightly generated. As shown in FIG. 3A , the fallen adhering dirt or the generated foam collects near the surface of the water rising by the rotation of the rotary drum 31 .

Here, as described above, the first rotational speed is set to be a rotational speed at which the water in the water tank 33 can rise to the height of the overflow port 60 . Moreover, as shown to FIG. 3B, the rotation direction of the rotary drum 31, ie, the 1st rotation direction, is set as the direction in which the lower part of the rotary drum 31 faces the overflow port 60 side. Therefore, the fallen adhering dirt or the generated foam will pass through the overflow channel 61 from the overflow port 60 and be discharged to the outside of the machine in sequence naturally. Therefore, it is possible to suppress the occurrence of the inconvenience of adhering dirt and foam that have been dropped once to the inside of the water tank 33 and other places inside and outside the rotating drum 31 . Similarly, since the fallen lotion residues are also discharged from the overflow port 60 in sequence, the occurrence of the disadvantage of abnormal foaming caused by continuous foaming due to the rotation of the rotary drum 31 can be suppressed.

Next, the control unit 57 determines whether or not a predetermined time (for example, 30 seconds) has elapsed since the rotation of the rotary drum 31 in step S201 (step S202), and continues the rotation of the rotary drum 31 until the predetermined time elapses (step S202: no). In addition, in the present embodiment, although the first step (step S200 ) is constituted by the processing of steps S201 and S202, other processing such as the processing of step S203 described later may be included. That is, as long as the first process in the present disclosure includes controlling the motor in the present disclosure, the water in the water tank in the present disclosure can be raised to the height of the overflow port in the present disclosure at a rotational speed to rotate the present disclosure. When the groove is rotated in the first rotational direction, other processes may be included.

Next, after a predetermined time has elapsed (step S202: YES), the control unit 57 opens the drain valve 43 to drain the water in the water tank 33 from the drain port 40 (step S203). The processing from steps S201 to S203 takes about 30 seconds. At this time, it is preferable that the rotating drum 31 be in a stationary state.

This is because among the adhering contaminants dropped by rotating the rotary drum 31 at the first rotational speed, adhering contaminants having a relatively light specific gravity are discharged from the overflow port 60 as described above. However, when there is adhering dirt with a very large specific gravity, the adhering dirt with a very large specific gravity may not reach the vicinity of the surface of the water rising by the rotation of the rotary drum 31 and may not be discharged from the overflow port 60 . sex. Therefore, in step S203 , in order to quickly discharge the adhering contaminants with a very large specific gravity to the outside of the machine from the drainage path 42 , it is necessary to avoid the useless generation of water flow that hinders the discharge by driving the rotary drum 31 .

In addition, as described above, since it may be difficult to discharge the adhering dirt with a very large specific gravity from the overflow port 60 , it is preferable to always drain the water from the drain passage 42 between the first step and the second step.

Then, the control unit 57 starts the water supply to the water tank 33 again by closing the drain valve 43 and opening the water supply valve 44 (step S300). Like the process of step S102, the control part 57 determines whether the water level in the water tank 33 has reached the 1st predetermined water level (step S301). The control unit 57 continues to supply water until the water level in the water tank 33 reaches the first predetermined water level (step S301: NO), and after reaching the first predetermined water level (step S301: Yes), closes the water supply valve 44 to stop water supply (step S302) . The processing from steps S300 to S302 takes about one minute.

Next, the control part 57 performs a 2nd process (step S400). The second step is a step of controlling the motor 35 to rotate the rotary drum 31 in a second rotational direction opposite to the first rotational direction. Specifically, the control unit 57 starts the rotation of the rotary drum 31 at the first rotation speed (for example, 80 r/min) by the motor 35 in the same manner as in the first step (step S401 ). Here, as shown in FIG. 3C , the rotation direction of the rotary drum 31, that is, the second rotation direction is the direction in which the lower part of the rotary drum 31 faces the opposite side to the overflow port 60, that is, the direction opposite to the first rotation direction.

Generally speaking, a large amount of dirt in the water tank 33 adheres to the vicinity of the water level in the course of washing general clothes, but first, in the first step, as shown in FIG. 3A , the right side of the water tank 33 is viewed from the front as shown in FIG. The area (on the overflow port 60 side) is cleaned. Next, in the second step, as shown in FIG. 3C , the area on the left side (the side opposite to the overflow port 60 ) in the water tank 33 is cleaned when viewed from the front. In this way, by performing the first step and the second step, it is possible to prevent the region to be cleaned from being uneven.

Furthermore, as shown in FIGS. 3A and 3B , in the first step, the adhering dirt in the water tank 33 or the foaming caused by the residual lotion residue has already been discharged from the overflow port 60, so in the second step In the process, finish washing can be performed with less contamination or foaming.

Next, the control unit 57 determines whether a predetermined time (for example, 30 seconds) has elapsed since the rotation of the rotary drum 31 in step S401 (step S402), and continues the rotation of the rotary drum 31 until the predetermined time elapses (step S402: no). In addition, in the present embodiment, although the second step (step S400 ) is constituted by the processing of step S401 and step S402, other processing such as the processing of step S403 described later may be included. That is, the second process in the present disclosure may include other processing as long as it includes a process of controlling the motor in the present disclosure to rotate the rotation groove in the present disclosure in the second rotational direction opposite to the first rotational direction.

Next, after a predetermined time has elapsed (step S402: YES), the control unit 57 opens the drain valve 43 to drain the water in the water tank 33 from the drain port 40 (step S403). The processing of steps S401 to S403 takes about 30 seconds. Then, the process of the control part 57 transfers to the next process (step S500).

In a general tank cleaning process, the tank cleaning agent is injected in the cleaning process, and the rinsing process is performed so that the tank cleaning agent does not remain in the water tank 33 . On the other hand, since the maintenance course in the present embodiment is a course for simple maintenance every day without using the tank cleaning agent, the tank cleaning agent is not put into the water tank 33 . Therefore, step S500 becomes the final spin-drying process rather than rinsing. This final dehydration process takes about 1 minute.

By configuring the program as described above, the operation time of this maintenance course is very short (for example, about 5 minutes), and it is a very useful course that can be easily used when the user cares.

In addition, as long as the input setting unit 58 can set both the tank cleaning course for the main cleaning of the inside of the water tank 33 with the tank cleaning agent and the short-time maintenance course of the present embodiment, the front-loading washing machine 10 can perform the operation according to the situation. Maintenance of a wide range of washing machines will be more useful.

In addition, in step S301 of the second step, the control unit 57 may control the water supply valve 44 so that the water supply water level becomes a second predetermined water level (for example, a water level height of 90 mm) higher than the first predetermined water level (for example, a water level height of 90 mm). 110mm). This is because in the first step, the water level in the water tank 33 is raised to the height of the overflow port 60 by the rotation of the rotary drum 31, and even if the water supply water level continues to rise, the amount of water overflowing from the overflow port 60 is only increased. . On the other hand, in the second step, since the water rising in the water tank 33 by the rotation of the rotary drum 31 exists on the side opposite to the overflow port 60, the cleaning effect of the water tank 33 becomes higher as the water supply water level is higher. higher.

Similarly, in order to further enhance the cleaning effect of the water tank 33, the control unit 57 may control as described below. That is, the control unit 57 may control the motor 35 so that the rotational speed of the rotating drum 31 in step S401 of the second step becomes the second rotational speed (for example, 80 r/min) higher than the first rotational speed (for example, 80 r/min). , 100r/min). Moreover, the control part 57 may control the motor 35 so that the rotation time of the rotary drum 31 in step S402 of the 2nd process may be longer than the predetermined time (for example, 30 seconds) of the 1st process (for example, 60 seconds) ). In this way, by setting the rotation speed of the rotary drum 31 to be faster, or by setting the rotation time of the rotary drum 31 to be longer, the washing effect of the water tank 33 becomes higher. [1-3. Effects, etc.]

As described above, in the present embodiment, drum type washing machine 10 includes water tub 33 , rotary drum 31 , motor 35 , water supply valve 44 , drain valve 43 , drain port 40 , overflow port 60 , and control unit 57 . The water tank 33 stores water. The rotary drum 31 is rotatably arranged in the water tank 33 . The motor 35 is a member for driving the rotating drum 31 . The water supply valve 44 is a member for supplying water to the water tank 33 . The drain valve 43 is a member for draining the water in the water tank 33 . The drain port 40 is provided in the lower part of the water tank 33 . The overflow port 60 is disposed above the water tank 33 than the drain port 40 . The control unit 57 controls the water supply valve 44 to supply water into the water tank 33, and then performs the first step, and controls the drain valve 43 to discharge the water in the water tank 33 from the drain port 40, and controls the water supply valve 44 to make After water is supplied to the water tank 33 again, the second step is performed. The first step is a step of controlling the motor 35 to rotate the rotary drum 31 in the first rotation direction at a rotational speed at which the water in the water tank 33 can rise to the height of the overflow port 60 . The second step is a step of controlling the motor 35 to rotate the rotary drum 31 in a second rotational direction opposite to the first rotational direction. In addition, the first rotation direction is a direction in which the lower part of the rotary drum 31 faces the overflow port 60 side.

In this way, after the drum type washing machine 10 discharges the dirt or foam from the overflow port 60 in the first step, it is possible to easily drain the water tank 33 in the second step in a short time without using a tank detergent or the like. maintenance. Therefore, the inner surface of the water tank 33 and the inner and outer surfaces of the rotary drum 31 can be efficiently removed in a short time without using a tank cleaning agent, and the water tank 33 and the rotary drum 31 can be kept clean more easily.

In the present embodiment, the front-loading washing machine 10 further includes a water level detection unit 46 for detecting the water level in the water tank 33, and the control unit 57 may control the water supply valve 44 so that the water level in the second step becomes higher than the water level in the first step. The water level in the process is higher.

Thereby, in the second step, since the water rising in the water tank 33 by the rotation of the rotary drum 31 exists on the side opposite to the overflow port 60, the higher the water supply water level is within a predetermined range, the cleaning of the water tank 33 is improved. The effect becomes higher. Therefore, the drum type washing machine 10 can efficiently remove the dirt on the inner surface of the water tub 33 and the inner and outer surfaces of the rotary drum 31 in a short time, and keep the water tub 33 and the rotary drum 31 clean more easily.

Like this embodiment, the control part 57 may control the motor 35 so that the rotation speed of the rotating drum 31 in the 2nd process may become higher than the rotation speed of the rotating drum 31 in the 1st process.

Thereby, in the second step, the higher the rotational speed of the rotary drum 31 is within the predetermined range, the higher the cleaning effect of the water tank 33 becomes. Therefore, the drum-type washing machine 10 can efficiently remove contamination on the inner surface of the water tub 33 and the inner and outer surfaces of the rotary drum 31 in a short time, and keep the tubs clean more easily.

Like this embodiment, the control part 57 may control the motor 35 so that the rotation time of the rotary drum 31 in a 2nd process may become longer than the rotation time of the rotary drum 31 in a 1st process.

Accordingly, in the second step, the longer the rotation time of the rotary drum 31 is within the predetermined range, the higher the cleaning effect of the water tank 33 becomes. Therefore, the drum-type washing machine 10 can efficiently remove contamination on the inner surface of the water tub 33 and the inner and outer surfaces of the rotary drum 31 in a short time, and keep the tubs clean more easily.

In addition, since the above-mentioned embodiment is an example of the technique in this disclosure, various changes, substitutions, additions, omissions, etc. are possible within the scope of the claims or the equivalents thereof.

industrial availability The present disclosure can be utilized in the maintenance of front-loading washing machines.

10: Drum-type washing machine 31: Rotary drum 32: water hole 33: Sink 34: Rotary axis 35: Motor 36: Protrusions 37: Cover 38: Opening 39: washing machine body 40: drain 41a: Suspension 41b: Anti-vibration components 42: Drainage Path 43: Drain valve 44: Water supply valve 45: Water supply path 46: Water level detection department 46a: Air collector 46b: Pressure sensor 47: Heater 48: blower fan 49: Warm air supply path 51: Warm air outlet 52: warm air inlet 57: Control Department 58: Input setting section 59: Display part 60: Overflow port 61: Overflow road 80: Circulating pump 81: Loop Path 82: Circulation port a: Flow of wash water b: warm wind direction S100, S101, S102, S103, S200, S201, S202, S203, S300, S301, S302, S400, S401, S402, S403, S500: Steps

FIG. 1 is a side sectional view of a drum-type washing machine in Embodiment 1. FIG.

FIG. 2 is a flowchart showing the operation of the maintenance course of the drum type washing machine in Embodiment 1. FIG.

3A is a front view schematically showing a portion of a water tank and a rotary drum of the drum-type washing machine in the first step of Embodiment 1. FIG.

3B is a front view schematically showing a portion of a water tank and a rotary drum of the drum-type washing machine in the first step of Embodiment 1. FIG.

3C is a front view schematically showing a portion of a water tank and a rotary drum of the drum-type washing machine in the second step of the first embodiment.

31: Rotary drum

33: Sink

42: Drainage Path

60: Overflow port

61: Overflow road

Claims (4)

A drum-type washing machine, characterized in that: have: sink, to store water; a rotating tank, which is rotatably arranged in the aforementioned water tank; a motor for driving the aforementioned rotary slot; a water supply part for supplying water to the aforementioned water tank; a drainage part for draining the water in the water tank; a water outlet, arranged at the lower part of the aforesaid sink; an overflow outlet, located above the aforesaid sink than the aforesaid drain outlet; and The control unit controls the water supply unit to supply water into the water tank, and then performs the first step, and controls the drain unit so that the water in the water tank is discharged from the drain port, and controls the water supply unit to make After the water is supplied to the water tank again, the second step is performed. The first step is to control the motor to make the rotation tank rotate in the first rotation direction at a rotational speed at which the water in the water tank can rise to the height of the overflow port. In the step of rotating, the second step is a step of controlling the motor to rotate the rotation tank in a second rotation direction opposite to the first rotation direction, The said 1st rotation direction is set as the direction which the lower part of the said rotation tank faces the said overflow port side. The drum-type washing machine of claim 1, wherein the drum-type washing machine further comprises: The water level detection part detects the water level in the aforementioned water tank, The said control part controls the said water supply part so that the said water level in the said 2nd process may become higher than the said water level in the said 1st process. The drum-type washing machine according to claim 1 or 2, wherein the control unit controls the motor so that the rotation speed of the rotation tank in the second step is higher than the rotation speed of the rotation tank in the first step higher. The drum-type washing machine according to any one of claims 1 to 3, wherein the control unit controls the motor so that the rotation time of the rotation tank in the second step becomes longer than the rotation time of the rotation tank in the first step. The aforementioned rotation time is longer.

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