TW201938874A - Drum-type washing machine capable of improving the washing performance - Google Patents

Abstract

The object of the present invention is to provide a drum-type washing machine capable of improving the washing performance. To solve the problem, the drum-type washing machine includes: an outer tank (3) for storing water therein; a drum (4) having a concave cross section, which is supported in the outer tank (3) in a freely rotatable manner; and a circulation pump (40) for upwardly drawing water in the outer tank (3) and supplying water to the circulation flow path (31, 32) passing through the drum (4); a discharge portion configured to discharge water supplied to the circulation flow path (31, 32), and disposed on an opening (4b) side and a bottom surface portion (4d) side of the drum (4); and a mesh portion (4m) disposed on the bottom surface portion (4d) of the drum (4). The circulation pump (40) supplies water to the discharge portion on the opening portion (4b) side and the discharge portion on the bottom surface portion (4d) side simultaneously or individually through the circulation flow path (31, 32).

Description

Drum type washing machine

The present invention relates to a drum-type washing machine.

The drum-type washing machine is a person who loads clothes into a drum that is inclined slightly or with the front facing upwards, and performs washing, washing, and dewatering works. In the washing process and the washing process, the drum is rotated at a low speed, and the tumble is performed by lifting the laundry accumulated in the lower part of the drum and dropping it from the upper part of the drum. By this rolling operation, mechanical force is applied to the clothes, and washing and washing are performed. In the dehydration process, the drum is rotated at a high speed, and the centrifugal force caused by the rotation is used to carry out the centrifugal dehydration from the laundry to the outside of the laundry.

Also, in the laundry process, a process is performed in which the washing water in the washing tub (outer tank) is pumped up by the pump and sprinkled on the laundry to soak the washing water in which the detergent is dissolved into the laundry. In this way, compared with the vertical type washing machine, the drum type washing machine can ensure the washing performance even with less water, and can save water.

In addition, if a large amount of laundry is washed during the laundry, the space between the laundry is narrowed, so the movement of the laundry in the drum is suppressed. Because of this, the degree of penetration of the washing liquid with respect to the laundry at the contacted portion and the non-contacted portion of the washing liquid becomes uneven, and it becomes easy to create a gap in the removal of the soiling of the laundry. . In this way, the presence or absence of contact with the washing liquid is the cause of insufficient washing or uneven washing.

In the prior art, a technique disclosed in Patent Document 1 is known as an invention that seeks to make the degree of penetration of the washing liquid uniform. Patent Document 1 discloses a technique for bringing water into contact with a quilt from the front side and the rear side of a drum. This technique is to introduce the washing water into the drum by applying pressure when the drum is rotated. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2002-224487

[Problems to be Solved by the Invention]

However, in Patent Document 1, in order to make the washing water scattered into the drum into a powerful water flow, it is necessary to rotate the drum at a high rotation speed generally at which a quilt is stuck on the inner peripheral surface of the drum. . Therefore, in the laundry process and the like, it is not possible to perform a tumbling operation in which laundry is dropped from the upper part of the drum, and it is impossible to perform mechanical washing and cleaning.

The present invention is to solve the aforementioned problems of the prior art, and an object thereof is to provide a drum type washing machine capable of improving cleaning performance. [Means to solve the problem]

The present invention is characterized by comprising: an outer tank, which is used for storing water in the interior; and a roller having a concave cross section, which is rotatably supported in the outer tank; and a circulating pump, which connects the aforementioned outer The water in the tank is drawn up and supplied to a circulation flow path in the drum, and a discharge portion that discharges the water supplied to the circulation flow path is provided at the opening side and the bottom surface side of the drum. [Effect of the invention]

According to the present invention, a drum type washing machine capable of improving washing performance can be provided.

Hereinafter, an embodiment for implementing the present invention (hereinafter, referred to as an “embodiment”) will be described in detail with reference to the drawings as appropriate. In addition, in the following description, the directions of front, back, up, down, left, and right are based on the directions of front, back, up, down, left, and right as shown in FIG. 1.

As shown in FIG. 1, the drum-type washing machine 1 is a drum-type washer-dryer. As shown in FIG. 2, the drum type washing machine 1 includes a drum 3 (inside) which is provided with an outer tank 3 which stores water therein, and a drum which is rotatably supported in the outer tank 3. And a frame 10 (refer to FIG. 1) housing the outer tank 3 and the rotating drum 4.

The frame 10 is a person who constitutes an outer contour, and is formed by pressing a sheet metal (metal, painted steel plate), etc., and includes a front panel (front panel) 11 disposed on the front surface, and a left and right panel. The side panel (side plate) 14 on the side. In addition, the frame 10 includes a back panel (back plate) 19 which is formed in a slightly sloping shape when viewed from above and is disposed on the back surface by press working of a sheet metal or the like, and is disposed in the outer groove 3. A base 17 at the bottom side and an upper surface panel (upper plate, top panel) 18 disposed above the outer tank 3. The frame 10 includes a base 17 and has a box shape.

The front panel 11 includes a front panel 12 disposed at an upper portion of the front, and a front panel 13 disposed at a lower portion of the front. In addition, the front panel 11 may be configured by a single panel.

A door 6 is attached to the front upper panel 12 via a pivot. At the front lower panel 13, a cover 13 d is installed to allow a screen member of a wire dust filter (not shown) to enter and exit. The side panel 14 is formed by pressing a sheet metal by press working or the like, and is formed to have the same height as the front panel 11. The back panel 19 is a sheet metal formed by press working or the like.

The base 17 is made of, for example, a synthetic resin, and as shown in FIG. 2, ribs are formed on the inner side and reinforced. At the base 17, the lower end of the side panel 14 is fixed by screws or the like.

The upper surface panel 18 is formed by, for example, molding a synthetic resin, and is formed into a substantially rectangular shape when viewed in plan. The upper panel 18 is formed in a single plate shape, and is configured to close the upper opening formed by connecting the front panel 11, the side panel 14, and the back panel 19.

In addition, a lotion input unit 20 is installed on the upper surface panel 18 at the front left side in the front-rear direction, and an operation panel 22 is installed at the front right side. In addition, as the synthetic resin, a resin having high strength and excellent abrasion resistance can be selected, and specifically, POM (polyoxymethylene resin) can be selected.

A water supply unit (not shown, including a member connected to water supply), a clothes dryer 37, and the like are mounted on the upper panel 18. The water supply unit (not shown) is a water supply pipe (not shown), which is connected to the water supply hose connection port 18f (refer to FIG. 1) and the bath water hose connection port 18g (refer to FIG. 1). Solenoid valve, pump that sucks bath water, etc.

As shown in FIG. 2 and FIG. 3, the outer groove 3 is generally formed into a cylindrical shape by using a synthetic resin, and the rotating drum 4 is coaxially wrapped. The outer tank 3 is opened at the front side, and a roller motor (not shown) is attached to the outer center of the bottom surface that becomes the rear side. The rotating shaft of the drum motor passes through the outer groove 3 and is combined with the rotating drum 4. The outer groove 3 is constituted by a bottomed cylindrical outer groove body 3a and an outer groove cover 3b attached to the front opening of the outer groove body 3a.

A rubber bellows (not shown) is provided at the opening 3s of the outer tank 3 (outer tank cover 3b), and the outer tank 3 is closed by closing the door 6 (refer to FIG. 1). Make a water seal. On the inner side of the outer tank cover 3b, a front-side discharge portion 31a (refer to FIG. 5 (a)) is provided, which constitutes a water outlet on the opening portion side of the rotary drum 4.

Further, at the rear surface of the bottom surface portion 3d of the outer tank body 3a, a rear-side discharge portion 32a is provided which constitutes a water outlet on the bottom surface portion 4d (see FIG. 7) side of the rotary drum 4. The rear ejection portion 32a is disposed at a position overlapping the central axis O1 (the central axis of the outer groove 3) of the rotary drum 4 as shown in FIG. 6, and is disposed at the front ejection portion 31a. At a lower position. That is, the rear-side discharge part 32a is arrange | positioned above the water level of the water accumulated in the rotating drum 4. The rear ejection portion 32 a is formed in a vertically long shape extending upward and downward from above the rotating drum 4. In addition, the outer groove 3 is elastically supported by the shock absorber 5 (refer to FIG. 2).

A water supply port 3c for supplying water and lotions to the inside of the outer tank 3 is provided at the outer part of the rear part of the outer tank body 3a as shown in FIG. The water supply port 3c and the lotion container are connected by a bellows hose (not shown) made of rubber.

At the inner peripheral surface of the lower part of the outer groove 3, as shown in FIG. 2 and FIG. 3, the concave portion 3f provided with the concave concave portion 3f is extended so as to exist in the axial direction of the outer groove 3. It is set. The lower surface of the recessed portion 3f is an inclined surface that descends from the front side toward the rear side, and a drain port 3e is provided at the rear side of the recessed portion 3f (see FIG. 4). A bellows hose (not shown) connected to a circulation pump 40 described later is connected to the drain port 3e. At the front side of the recessed portion 3f, a bottom circulating water inlet 3k is provided (refer to FIG. 2).

Through the recessed portion 3f, the washing water of the outer tub 3 is sucked into the circulation pump 40. By providing the recessed portion 3f, the amount of water stored in the outer tank 3 is increased. Therefore, by increasing the rotation speed of the circulation pump 40, a large amount of laundry water is sucked into the circulation pump 40, and the circulation flow rate is increased. As a result, the washing effect of the laundry is compared with the prior art. Greatly improved.

The drain hose 26 is such that one end thereof is connected to a water outlet (not shown) of a circulation pump 40 described later, and the other end side thereof is exposed at the base as shown in FIG. 4 At the rear end of 17th. The drain hose 26 is provided with a drain valve 25 (refer to FIG. 4) while being extended inside the casing 10.

The rotating drum 4 is a cylindrical washing and dewatering tank supported rotatably. At the outer peripheral wall of the rotating drum 4, through-holes 4a are formed for the majority of water flow and ventilation, and at the front end surface, openings 4b are formed for the passage of laundry such as laundry. A fluid balancer (not shown) that rotates integrally with the rotary drum 4 is provided at the outer peripheral side of the opening portion 4b. A lifter (not shown) is provided on the inner peripheral wall of the rotating drum 4 to lift laundry during a washing operation or a drying operation. In addition, the rotation central axis of the rotating drum 4 is inclined so as to be slightly horizontal or to make the opening 4b side higher.

As shown in FIG. 7, at the bottom surface portion 4 d of the drum 4, a plurality of grid portions 4 m are provided at intervals in the circumferential direction and are provided at intervals. The grid portion 4m is made of synthetic resin independently of the rotary drum 4 and has a plurality of fine through holes (for example, a shape of a slightly quadrangle in which a Japanese yen coin cannot be inserted), It is installed at the bottom surface 4d. The grid portion 4m is arranged at the bottom surface area 4f which is defined by the rib 4g in the circumferential direction of the bottom surface portion 4d. The mesh portion 4m is formed to have a generally trapezoidal shape corresponding to the shape of the bottom surface region 4f when viewed from the axial direction. As shown in FIG. 6, the mesh portion 4m is disposed so as to face the rear ejection portion 32a provided at the bottom surface portion 3d of the outer groove body 3a. As shown in FIG. 7, the mesh portion 4m faces the protruding end 32b of the rear ejection portion 32a. As a result, the water scattered by the discharge portion 32a from the rear side is dispersed into the rotating drum 4 through the mesh portion 4m. In addition, as shown in FIGS. 3 and 6, the rear ejection portion 32 a is fixed to the bottom surface portion 3 d of the outer groove 3 via a flange portion 32 c provided at the front end portion. The protruding end 32b is curved along the circumferential direction of the rotary drum 4. In addition, the protruding end 32b may have a linear shape or a bent shape, and may also have a shape that is curved toward the opposite side along the circumferential direction.

In addition, the grid portion 4m may be integrally provided at the bottom surface portion 4d. In this case, the through-hole is formed directly on the bottom surface portion 4d by punching or the like.

Between the outer tank 3 and the base 17, as shown in FIG. 3, a circulation pump 40, a screen case 41, and a drain valve 25 are provided (refer to FIG. 4). The filter case 41 has a cylindrical shape with an opening at the front side as shown in FIG. 3, and a removable filter (not shown) is installed inside to trap and collect the water in the laundry. Foreign body or shreds. The filter case 41 is as shown in FIG. 1, and the filter (not shown) can be easily attached and detached by opening the cover 13 d provided on the front lower panel 13 and turning the handle 41 a. This screen case 41 is inclined so that the front side becomes high.

Next, the circulation system of the washing water centered on the circulation pump 40 will be described. As shown in FIG. 3, the circulating pump 40 has a structure in which a circulating pump motor 42 is mounted on a casing formed integrally with the screen case 41. The casing is formed with three first outlet ports 51, second outlet ports 52 (refer to FIG. 4), third outlet ports 53, and inlet and outlet ports (not shown).

The first discharge port 51 is, as shown in FIG. 3 and FIG. 4, a first circulation flow path 31 (refer to FIG. 5 (a)) provided on the inner peripheral wall of the outer tank cover 3b via the bellows hose 51a. ), (B)) for connection.

The bellows hose 51a and the first circulation flow path 31 are together with a bellows hose (not shown) connected to the drain opening 3e (see FIG. 4) of the recessed portion 3f of the outer groove 3. Ground to form a circulation flow path from the lower part of the outer tank 3 to the upper part of the front side of the outer tank 3.

The first circulation flow path 31 is connected to a nozzle-side discharge portion 31a (see FIG. 5 (a)) provided on the inner side above the outer tank cover 3b and serving as a nozzle.

The second discharge port 52 is connected to the bellows hose 52a constituting the second circulation flow path 32 as shown in FIG. The bellows hose 52a is a hose which is extended to the rear, is erected upward, and is arranged behind the bottom surface portion 3d of the outer tank 3. At the front end portion of the bellows hose 52a, a second discharge portion 32a connected to the rear surface of the bottom surface portion 3d of the outer groove 3 is provided.

In addition, the second circulation flow path 32 formed by the bellows hose 52a is connected to the bellows hose (not shown) connected to the drain port 3e of the recessed portion 3f of the outer groove 3, A circulation flow path is formed from the bottom of the outer tank 3 to the middle portion on the rear side of the outer tank 3.

The third outlet port 53 is connected to the inflow port 3k formed so as to face the recessed portion 3f (refer to FIG. 3) of the bottom of the outer groove 3 via the bellows hose 33 as shown in FIG. .

When the drain valve 25 connected to the circulation pump 40 is closed, if the circulation pump motor 42 of the circulation pump 40 is rotated forward, the washing water in the outer tank 3 is discharged from the drainage port 3e ( Referring to FIG. 4), a foreign body is removed through a bellows hose (not shown) and a strainer (not shown) in the strainer case 41. After that, the washing water enters the circulation pump 40, and is sent from the first discharge port 51 to the first circulation flow path 31, and from the second discharge port 52 to the second circulation flow path 32. In addition, water is scattered into the rotating drum 4 (refer to FIG. 2) from the front-side discharge portion 31 a (refer to FIGS. 5 (a) and (b)) and the rear-side discharge portion 32 a.

In addition, if the circulation pump motor 42 of the circulation pump 40 is reversely rotated, the washing water in the outer tub 3 passes from the drain port 3e (refer to FIG. 4) through a bellows hose (not shown) and is filtered. A filter (not shown) in the mesh case 41 removes foreign matter. Thereafter, the washing water enters the circulation pump 40, is discharged from the third discharge port 53, and returns to the outer tank 3 through the bellows hose 33 and the inlet 3k. When the drain valve 25 is opened, the washing water in the outer tank 3 is discharged from the drain hose 26 (refer to FIG. 4) to the outside of the machine through a screen (not shown) in the screen case 41. .

The drum-type washing machine 1 according to this embodiment is provided with three operation modes: one of a front side water running mode (open side side water running mode) and a rear side water running mode (bottom side side water running mode). Mode, and both sides running mode. The front-side water-spraying operation mode is an operation mode in which water is discharged from the front-side discharge portion 31 a that becomes the opening portion side of the rotary drum 4. The rear-side water-spraying operation mode (bottom surface side water-spraying operation mode) is an operation mode in which water is discharged from the rear-side spouting portion 32 a on the bottom surface side of the rotary drum 4. The two-side water-spraying operation mode is an operation mode in which water is discharged from both the front-side discharge portion 31a and the rear-side discharge portion 32a.

The switching of each operation mode can be performed, for example, by changing the rotation speed of the circulating pump motor 42 (by changing the discharge flow rate).

FIG. 8 is an explanatory diagram showing one form of the circulating pump, (a) is a schematic explanatory diagram when the rotation speed is low, and (b) is a case when the rotation speed is high A schematic illustration. It is a schematic diagram showing the appearance of the scattered water in the aforementioned discharge portion and the rear discharge portion in the circulation system.变更 When the rotation speed of the circulating pump motor 42 is changed, the lift system which is the discharge performance of the circulating pump motor 42 is changed. If the rotation speed of the circulating pump motor 42 is low, the discharge water surface cannot be lifted to a high place, and the lift system stays at a low position. On the other hand, if the rotation speed of the circulation pump motor 42 is increased, the water surface to be discharged is always raised to a high place. In the present embodiment, the rear ejection portion 32a is provided at a position lower than the front ejection portion 31a. Therefore, as shown in FIG. 8 (a), if the rotation speed of the circulation pump motor 42 is set so that the water can be discharged from the rear discharge portion 32a, the lower rotation speed can be achieved. At speed, water is discharged from only the rear-side discharge portion 32a. In contrast, as shown in FIG. 8 (b), if the rotation speed of the circulation pump motor 42 is set to a higher rotation speed so that the water can be discharged from the front discharge portion 31a, In addition to the rear side discharge portion 32a, water can be dispersed from the front side discharge portion 31a. That is, by adjusting the rotation speed of the circulating pump motor 42, it is possible to change the scattered water state.

In contrast, by adopting a configuration in which the rear ejection portion 32a is disposed at a higher position than the front ejection portion 31a, it is possible to set the ejection portion 31a only from the front side at a lower rotation speed. And water is used as the composition of scattered water. In addition, if the rotation speed of the circulation pump motor 42 is set to a high rotation speed so that the water can be discharged from the rear discharge portion 32a, it can be achieved in addition to the front discharge portion 31a. The rear-side spouting portion 32a uses water as scattered water.

The rotation speed of the circulating pump motor 42 is controlled by a control device 38 (see FIG. 10) provided in the housing 10.

In addition, by changing the configuration of the circulation pump 40, it can be set to include a front side water running mode (open side side water running mode), a rear side water running mode (bottom side side water running mode), and both sides of the water running mode. Drum-type washing machine 1 of three operation modes.

Fig. 9 (a) is an explanatory diagram showing one form of the circulating pump, (b) is a schematic explanatory diagram when the fan blade is rotated forward, and (c) is an Schematic explanatory diagram of the case where the fan blade is reversely rotated. (1) At the circulation pump 40, the first ejection port 51 and the second ejection port 52 facing each other are provided. The circulation pump 40 is provided with stoppers 48 and 49 for controlling the flow rate. The stopper 48 is mainly used when the fan blade 45 is rotated in the direction of X1 in the figure, so that the flow rate to the first discharge port 51 becomes larger than the flow rate to the second discharge port 52. More ways to be a controller. In addition, the stopper 49 is mainly used when the fan blade 45 is rotated in the direction of X2 in the figure, so that the flow rate flowing to the second discharge port 52 will be more than that flowing to the first discharge port 51. Traffic and more ways to be a controller.

As shown in FIG. 9 (b), by rotating the circulating pump motor 42 in the direction of arrow X1 in the figure, the flow rate toward the first discharge port 51 can be increased. With this, the system can be set to the water-discharge operation mode before the water-discharge operation is performed only from the front discharge portion 31a. On the other hand, as shown in FIG. 9 (c), by rotating the circulating pump motor 42 in the direction of the arrow X2 in the figure, the flow rate toward the second discharge port 52 can be increased. Thereby, the system can be set to the side-side water-spraying operation mode only after the water is discharged from the rear-side discharge part 32a.

In addition, by performing the operation of alternately switching the rotation direction of the circulation pump 42, a two-side water-spraying operation mode in which water can be sputtered from both the front-side discharge portion 31 a and the rear-side discharge portion 32 a can be set. In this case, by setting a timing for switching, the washing process and the washing process can be performed in an operation mode in which the forward and backward scattered water is intermittently performed and an operation mode in which the forward and backward scattered water is slightly continuously performed.

In addition, by appropriately setting the shape of the stoppers 48 and 49 or the amount of protrusion toward the pump, even when the fan blade 45 is rotated in a single direction, it can respond to the circulating pump 40. The rotation speed is set to a state in which water is dispensed from only the front side discharge portion 31a, or water is dispensed simultaneously from both the front side discharge portion 31a and the rear side discharge portion 32a.

Fig. 10 is a control block diagram of a drum-type washer-dryer. As shown in FIG. 10, the control device 38 is provided with a microcomputer 38a, a driving circuit 64, and the like, and also has ON and OFF signals of the switches 12a and 12b of the operation keys 22 shown in FIG. Input circuits for output signals from sensors (water level sensor 34, temperature sensor 62). In addition, the control device 38 obtains various information signals from the user's operation and the washing process (laundry process, washing process, dewatering process), and drying process via the microcomputer 38a. The control device 38 controls the microcomputer 38a with the drum motor 4j, the water supply solenoid valve 16, the drain valve 25, and the circulation pump 40 via the drive circuit 64. In addition, the display 12c, the light-emitting element 66, or the buzzer 67 is controlled to notify the user of information related to the drum-type washer-dryer.

The lotion water supply solenoid valve 16b supplies tap water from the water supply hose connection port 18f (refer to FIG. 1) to the lotion input chamber (not shown) of the lotion tray through a water supply path (not shown). . The tap water supplied to the lotion-feeding chamber is filled with the lotion-filled lotion into the outer tank 3 (see FIG. 2) through the lotion container and the bellows hose.

The finishing agent water supply solenoid valve 16c supplies tap water from the water supply hose connection port 18f to a finishing agent input chamber (not shown) of the lotion tray through a water supply path (not shown). The tap water filled with water to the finishing agent input chamber is filled into the outer tank 3 through the bellows hose together with the finished finishing agent (softener).

The outer tank water supply solenoid valve 16d supplies tap water from the water supply hose connection port 18f through a water supply path (not shown) to supply water to the outer tank 3 from the bellows hose.

The cooling water supply solenoid valve 16e supplies tap water from the water supply hose connection port 18f to a water-cooled dehumidification mechanism (not shown) of the clothes line through a water supply path (not shown).

In addition, the bath water drawn from the bath water suction port 18g (refer to FIG. 1) by the bath water suction pump is supplied from the bellows hose to the outer tank through a water supply path (not shown). 3 within.

≪Operation Process≫ Next, an operation process of the drum-type washer-dryer will be described with reference to FIG. 11. FIG. 11 is a process diagram for explaining a washing process (laundry-washing-dewatering) operation process in the drum type washer-dryer of the first embodiment. In the following, the lotion water supply solenoid valve 16b is used as the first solenoid valve, the finishing agent water supply solenoid valve 16c is used as the second solenoid valve, the outer tank water supply solenoid valve 16d is used as the third solenoid valve, and cooling water is used. The water supply solenoid valve 16e will be described as a fourth solenoid valve.

As shown in FIG. 11, in step S1, the control device 38 accepts input of stroke selection (stroke selection) of the operation process of the drum-type washer-dryer. Here, the user opens the door 6 and puts it inside the rotating drum 4 for washing, and closes the door 6. After that, the user selects and inputs the operation process stroke by operating the operation switches 12a and 12b. When the operation switches 12 a and 12 b are operated, the stroke of the selected operation process is input to the control device 38. The control device 38 reads the corresponding operation mode from the operation mode database based on the inputted operation process schedule, and proceeds to step S2. In addition, in the following description, a standard stroke (washing-washing twice-dehydration) is selected as an explanation.

In step S2, the control device 38 performs a process (clothing amount detection) for detecting the weight (clothing amount) of the laundry which has been put into the rotary drum 4. Specifically, the control device 38 drives the drum motor 4j in a positive direction at a specific rotation speed (for example, 180 rpm), rotates the rotary drum 4, and calculates the weight (cloth quantity) of the laundry before water injection. .

In step S3, the control device 38 executes the process of calculating the washing amount and the operation time. Specifically, the control device 38 controls the water supply solenoid valve 16 (for example, the third solenoid valve is opened), and directly supplies water to the water supply port 3 c of the outer tank 3. In addition, although not shown, the control device 38 detects the electrical conductivity (hardness) of the supplied water through an electrical conductivity sensor (not shown) disposed at the bottom of the inner tank 3. ). The temperature of the water to be supplied is detected by the temperature sensor 62 (see FIG. 10). After that, the water supply solenoid valve 16 is controlled (for example, the third solenoid valve is closed), and the water supply to the outer tank 3 is ended.

The control device 38 searches the map based on the amount of cloth detected in step S2, the electrical conductivity (hardness) of the water, and the temperature of the water to determine the amount of washing agent to be input and the operation time. After that, the control device 38 displays the determined washing amount and operation time on the display 12c. In addition, although it is explained as a person that supplies water to the outer tank 3 and detects the electrical conductivity (hardness) and water temperature of the water, the system is not limited to this. For example, the electrical conductivity (hardness) and water temperature of the water during the previous operation may be stored in a memory section (not shown) of the microcomputer 38a in advance and used for this purpose.

In step S4, the control device 38 executes the lotion input waiting process. For example, the control device 38 waits for a specific time and proceeds to step S5. The user, while waiting, refers to the lotion displayed on the display 12c and loads the lotion into the lotion tray. In addition, the control device 38 is also a means (not shown) for detecting the opening and closing of the lotion tray, so that when the lotion tray is closed after being opened, it is regarded as having been closed. The person who has put in the lotion proceeds to the configuration in step S5.

In step S5, the control device 38 performs a lotion dissolution process. For example, the control device 38 controls the water supply solenoid valve 16 (for example, the first solenoid valve is opened), and supplies water to the lotion input chamber through a water supply pipe. The lotion and water in the lotion input chamber are via the lotion delivery pipe, the bellows hose, the water supply port 3c located at the upper part behind the outer tank 3, and the water supply path formed on the inner surface of the bottom wall of the outer tank 3 From its exit, it flows into the recessed portion 3f of the outer tank 3. When the water is supplied to a specific amount of water, the control device 38 controls the water supply solenoid valve 16 (for example, closes the first solenoid valve) and stops the water supply. After that, the control device 38 performs a lotion dissolving operation.

Specifically, the control device 38 controls the circulation pump 40, and controls the circulating pump 40 to inhale the water and lotion sucked in from the drainage port 3e through the bellows hose through the bellows hose 33 to the inlet 3k of the depression 3f. And spit it out. The water and the lotion discharged from the inflow port 3k flow through the recessed portion 3f, and advance toward the drain port 3e to be circulated. As a result, the water and lotion are stirred, and the lotion is dissolved in water. When a specific time (for example, 10 seconds) has elapsed, the control device 38 stops the circulating pump 40 and proceeds to step S6.

In step S6, the control device 38 executes a rotary water supply project. Specifically, the control device 38 controls the water supply solenoid valve 16 (for example, opens the first solenoid valve and the third solenoid valve), raises the water level of the washing water in the outer tank 3, and controls the drum motor. 4j controls the rotating drum 4 to rotate in a forward and reverse direction at a specific rotation speed (for example, 40 rpm [r / min]), and mixes clothes. The control device 38 controls the circulating pump 40 (circulating pump motor 42) at a specific rotation speed, and the washing water having a high concentration of the lotion sucked in from the drain port 3e is supplied from The front-side discharge portion 31 a and the rear-side discharge portion 32 a provided at the opening portion of the outer tank 3 are discharged into the rotary drum 4, and are thereby allowed to penetrate into the clothes inside the rotary drum 4.

In this case, the control device 38 interactively controls the rotation speed of the circulating pump 40 to a low rotation speed and a high rotation speed. If the rotation speed of the circulation pump 40 is controlled to a low rotation speed (for example, 1800 rpm), the amount of water in the washing water is reduced, and the head is reduced. Spit out the washing water.

On the other hand, if the rotation speed of the circulation pump 40 is controlled to a high rotation speed (for example, 2000 rpm), the water amount of the washing water will increase, and the lift system will increase, and the front discharge portion 31a and the rear discharge portion 32a Both sides spit out washing water to the inside of the rotating drum 4.

In the rotary water supply project, as described above, by the control device 38, the rotation speed of the circulation pump 40 is interactively controlled to a low rotation speed and a high rotation speed. Therefore, in the rotary water supply process, it is set to discharge only the discharged washing water from the rear discharge portion 32a, or to discharge from both the front discharge portion 31a and the rear discharge portion 32a. That is, the laundry water system is sequentially made into scattered water. Thereby, the laundry can be impregnated into the laundry inside the rotating drum 4 without leaking. In addition, the control of the control device 38 can be set to control the rotation speed of the circulating pump 40 at a specific interval to a low rotation speed and a high rotation speed, or it can be set to keep the rotation at one of the rotations The time of speed becomes a longer way to perform the control than the other side.

After that, if the water level of the washing water in the outer tub 3 rises to a specific water level (medium water level), the water supply is stopped (for example, the first solenoid valve and the third solenoid valve are closed). If a specific time has passed since the rotary water supply project was started, the rotary water supply project is ended, and the process proceeds to step S7.

In step S7, the control device 38 executes a pre-washing and stirring process. In addition, the so-called pre-washing and stirring process is a process of immersing clothes in washing water with a high concentration of lotion produced by the lotion dissolution process. By immersing the laundry in washing water with a high concentration of lotion, the washing power is improved.

Specifically, the control device 38 interactively controls the rotation speed of the circulating pump 40 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 2000 rpm), and the laundry water sucked in from the drainage port 3e, It is discharged from the front side discharge part 31a and the rear side discharge part 32a of the outer tank 3 into the inside of the rotating drum 4. In this case, too, since the rotation speed of the circulating pump 40 is controlled to be low and high, the washing water system is only discharged from the front side (or only from the rear side), or It becomes spit from the front and back sides. Thereby, the laundry water having a high lotion concentration can be impregnated into the laundry inside the rotary drum 4 without leakage.

In addition, the control device 38 controls the drum motor 4j and rotates the rotary drum 4 at a specific rotation speed (for example, 80 rpm), so that the centrifugal force with respect to the clothing exceeds the gravity, and the rotary drum 4 The clothes inside are attached to the inner peripheral wall surface of the rotating drum 4 so that the clothes do not fall from above the inside of the rotating drum 4. In other words, in the pre-washing and stirring process, the laundry is prevented from falling from above the rotating drum 4 so that it does not occur when the laundry is not applied from above the rotating drum 4. Mechanical force.

In the preparatory washing and stirring process of this embodiment, the rotary drum 4 is rotated in the forward direction, but it may be rotated in the reverse direction or both the forward and reverse directions. If a specific time has elapsed (for example, 3 minutes), the control device 38 ends the preparatory washing and stirring process, and proceeds to step S8.

In step S8, the control device 38 executes a formal washing and stirring project. In a formal laundry mixing project, for example, a flapping laundry project and a rubbing laundry project are implemented. The so-called flapping laundry project is to lift the laundry accumulated in the lower part of the rotary drum 4 by the rotation of the rotary drum 4 and cause the laundry to be larger than the centrifugal force relative to the laundry due to gravity. The process of rotating the upper part inside the drum 4 and dropping it, thereby giving mechanical force to the clothes.

Specifically, the control device 38 interactively controls the rotation speed of the circulating pump 40 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 2000 rpm), and the laundry water sucked in from the drainage port 3e, It is discharged from the front side discharge part 31a and the rear side discharge part 32a of the outer tank 3 into the inside of the rotating drum 4. In this case, too, since the rotation speed of the circulating pump 40 is controlled to be low and high, the washing water system is only discharged from the front side (or only from the rear side), or It becomes spit from the front and back sides. Thereby, the laundry water having a high lotion concentration can be impregnated into the laundry inside the rotary drum 4 without leakage. In addition, the control device 38 controls the drum motor 4j to rotate the rotary drum 4 in a forward and reverse direction at a specific rotation speed (for example, 40 rpm), and pats laundry inside the rotary drum 4 . If a specific time has elapsed (for example, 5 minutes), the control device 38 ends the tap washing process and proceeds to the kneading washing process.

The so-called rubbing and washing process is performed by rotating the rotating drum 4 to roll the laundry accumulated in the lower part of the rotating drum 4 on the inner peripheral wall surface of the rotating drum 4 (without causing the laundry to fall). Engineering with weaker mechanical power than slap. In other words, in the rubbing and washing process, the operation is performed while the laundry is rolled around the lower and inner parts of the rotating drum 4.

Specifically, the control device 38 interactively controls the rotation speed of the circulating pump 40 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 2000 rpm), and the laundry water sucked in from the drainage port 3e, It is discharged from the front side discharge part 31a and the rear side discharge part 32a of the outer tank 3 into the inside of the rotating drum 4. In this case, too, since the rotation speed of the circulating pump 40 is controlled to be low and high, the washing water system is only discharged from the front side (or only from the rear side), or It becomes spit from the front and back sides. Thereby, the laundry can be impregnated into the laundry inside the rotating drum 4 without leaking. In addition, the control device 38 controls the drum motor 4j to rotate the rotary drum 4 in a forward and reverse direction at a specific rotation speed (for example, 30 rpm) lower than the rotation speed at the time of beating a laundry process ( For example, the rotary drum 4 is rotated left and right at a rotation angle of 20 to 60 degrees), and the laundry inside the rotary drum 4 is kneaded and washed. When a specific time (for example, 1 minute) has elapsed, the control device 38 ends the kneading and washing process and proceeds to the washing 1 process (step S9 to step S12).

In step S9, the control device 38 executes drainage works. The control device 38 stops the drum motor 4j and the circulation pump 40, and opens the drain valve 25 to drain the washing water in the outer tank 3. The water level sensor 34 continuously monitors the water level of the washing water in the external tank 3 during the drainage. If the detection value of the water level sensor 34 is lower than a specific water level, the control device 38 ends the drainage project and proceeds to step S10.

In step S10, the control device 38 executes the dehydration 1 process. The control device 38 rotates the rotary drum 4 in a reverse direction at a high speed (for example, 1250 rpm) while maintaining the open state of the drain valve 25, and dehydrates the washing water contained in the laundry. If the specified time has elapsed, the control device 38 ends the dehydration 1 process and proceeds to step S11.

In step S11, the control device 38 executes a rotary spraying process. The control device 38 closes the drain valve 25 and controls the water supply solenoid valve 16 (for example, opens the third solenoid valve while turning the rotary drum 4 in a reverse direction at a medium speed (for example, 260 rpm). Valve), and the water is dispersed to the laundry. The control time of the water supply solenoid valve 16 (third solenoid valve) at this time is determined based on the amount of cloth detected in step S2. When a specific time has elapsed, the water supply is stopped (for example, the third solenoid valve is closed).

In addition, the control device 38 interactively controls the rotation speed of the circulating pump 40 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 2000 rpm), and the washing water sucked from the drainage port 3e is external The front side discharge portion 31 a and the rear side discharge portion 32 a of the tank 3 are discharged into the rotary drum 4. In this case, too, since the rotation speed of the circulating pump 40 is controlled to be low and high, the washing water system is only discharged from the front side (or only from the rear side), or It becomes spit from the front and back sides. Thereby, the washing water can be scattered to the clothes inside the rotating drum 4 without leaking. When the specific time has elapsed, the circulation pump 40 is stopped, the drain valve 25 is opened, and the washing water in the outer tank 3 is drained.

In step S12, the control device 38 executes the dehydration 2 process. The control device 38 rotates the rotary drum 4 in a reverse direction at a high speed (for example, 1250 rpm) while maintaining the open state of the drain valve 25, and dehydrates the washing water contained in the laundry. When the specified time has elapsed, the control device 38 ends the dehydration 2 process and proceeds to the washing 2 process (step S13 to step S16).

In step S13, the control device 38 executes a water supply project. The control device 38 closes the drain valve 25 and controls the water supply solenoid valve 16 (for example, the first solenoid valve is opened), and supplies clean water into the outer tank 3. If it rises up to a specific water level, the water supply is stopped (for example, the first solenoid valve is closed), and the control device 38 ends the water supply process and proceeds to step S14.

In step S14, the control device 38 performs a finishing agent (softener) water supply process. The control device 38 controls the water-supply solenoid valve 16 (for example, opens the second solenoid valve), and supplies washing water containing a soft finishing agent in the outer tank 3, and supplies the water supplied to step S13 to Wash water in the outer tank 3 is mixed with a soft finishing agent.

In step S15, the control device 38 performs a rotary water supply and supplementary water project. The control device 38 controls the water supply solenoid valve 16 (for example, opens the first solenoid valve and the third solenoid valve), and supplies water to the outer tank 3. When the water is supplied to a specific water level, the water supply is stopped (for example, the first solenoid valve and the third solenoid valve are closed). The control device 38 controls the drum motor 4j while supplying water to rotate the rotary drum 4 in the forward and reverse directions (for example, 40 rpm).

In addition, the control device 38 interactively controls the rotation speed of the circulating pump 40 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 2000 rpm), and the washing water sucked from the drainage port 3e is external The front side discharge portion 31 a and the rear side discharge portion 32 a of the tank 3 are discharged into the rotary drum 4. In this case, since the rotation speed of the circulating pump 40 is controlled to be low and high, the washing water system containing the soft finishing agent is only discharged from the front side (or only from the rear side). , Or become spit from the front and back sides. Thereby, the soft finishing agent can be impregnated into the clothes inside the rotating drum 4 without leaking.

In step S16, the control device 38 performs a washing and stirring process. The so-called washing and stirring process is the same as tap washing, in order to lift the clothes stored in the lower part of the rotating drum 4 by the rotation of the rotating drum 4, and because of the gravity, it becomes more than the centrifugal force relative to the clothes. The big thing is the process of dropping clothes from above the inside of the rotating drum 4.

Specifically, the control device 38 controls the drum motor 4j to rotate the rotary drum 4 (for example, 40 rpm). After that, the control device 38 interactively controls the rotation speed of the circulation pump 40 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 2000 rpm), and the washing water sucked in from the drainage port 3e is from before The side discharge portion 31a and the rear discharge portion 32a are discharged to the inside of the rotary drum 4, and the laundry is washed. In this case, too, since the rotation speed of the circulation pump 40 is controlled to be low and high, the washing water system is only discharged from the front side (or only from the rear side), or It becomes spit from the front and back sides. Therefore, the washing of clothes is promoted. After that, if a specific time has passed, the control device 38 ends the washing and stirring process and proceeds to the dehydration process (steps S17 and S18).

In step S17, the control device 38 executes drainage works. The control device 38 stops the drum motor 4j and the circulation pump 40, and opens the drain valve 25 to drain the washing water in the outer tank 3. The water level sensor 34 continuously monitors the water level of the washing water in the external tank 3 during the drainage. If the detection value of the water level sensor 34 is lower than a specific water level, the control device 38 ends the drainage project and proceeds to step S18.

In step S18, the control device 38 executes a dehydration process. Specifically, the control device 38 opens the drain valve 25 and controls the drum motor 4j to rotate the rotary drum 4 at a high speed (for example, 1000 rpm), and spin-dry the clothes by centrifugation. After that, if the specified time has elapsed, the control device 38 stops the drum motor 4j, closes the drain valve 25, and ends the washing cycle (washing-washing-dehydration).

As described above, in the drum washing machine of this embodiment, in the operation process, the rotation speed of the circulation pump 40 is interactively controlled to a low rotation speed and a high rotation speed, and the washing water sucked from the drainage port 3e or The washing water is discharged from the front discharge portion 31 a and the rear discharge portion 32 a into the rotary drum 4. Thereby, the laundry water or the washing water can be contained in the clothes without leakage. Therefore, it is possible to ensure high cleaning performance while suppressing costs without using a large circulation pump. In addition, it is possible to set the rotation speed of the rotary drum 4 to a desired speed, and perform washing and washing by tumble operation.

Here, the reason why high washing performance can be ensured is that, for example, in a formal laundry agitation process, sufficient laundry water is impregnated into the entire laundry which is lifted by the rotation of the rotary drum 4 Since the laundry is dropped in the neutral state, the washing water contained in the laundry is pushed out of the laundry together with the dirt by the impact at the time of falling (slap washing). In addition, since the washing water is soaked in the entire clothes, the washing ingredients can be diluted with good efficiency during washing, and the washing performance is also improved.

The water discharged from the rear discharge portion 32a is dispersed into the rotating drum 4 through the mesh portion 4m. Therefore, the washing water or washing water discharged from the rear discharge portion 32a is appropriately supplied into the rotary drum 4.

The circulation pump 40 is capable of simultaneously supplying washing water or washing water to the front discharge portion 31a and the rear discharge portion 32a through the circulation flow paths 31 and 32. Thereby, the laundry water or the washing water can be contained in the clothes without leakage. Therefore, it is possible to ensure high cleaning performance while suppressing costs without using a large circulation pump.

The circulation pump 40 can pass through the circulation flow paths 31 and 32 to individually supply washing water or washing water to the front discharge portion 31a and the rear discharge portion 32a. Thereby, the laundry water or the washing water can be contained in the clothes without leakage. Therefore, it is possible to ensure high cleaning performance while suppressing cost with good efficiency.

The rear ejection portion 32 a is formed in a vertically long shape extending upward and downward from above the rotating drum 4. Thereby, the washing water or the washing water can be efficiently disperse | distributed upwards and downwards in the inside of the rotating drum 4. Thereby, the laundry water or the washing water can be contained in the clothes without leakage. In addition, the rear ejection portion 32a may be provided in plural. For example, the rear ejection portion 32a may be plurally arranged in the up-down direction, the radial direction, and even the circumferential direction of the rotary drum 4. In this case, the system can ensure higher cleaning performance.

In addition, the rear-side discharge portion 32 a is disposed at an upper side than the water level of the water stored in the rotary drum 4. Thereby, the laundry or wash water can be efficiently distributed to the laundry in the rotary drum 4 at a position which is not immersed in the accumulated water. Therefore, the system can ensure high cleaning performance with good efficiency.

In addition, the system is provided with three operation modes including a front side water running mode, a rear side water running mode, and two sides water running mode. Therefore, it is possible to select an appropriate washing mode according to the degree of soiling or the amount of laundry, and perform efficient washing.

Next, the washing performance of the drum-type washing machine according to this embodiment will be described. The washing performance is based on the JIS-C9606 standard, so that dirt such as tallow or protein is attached to a test piece of 5 cm square kapok, and this test piece is sewn on a shirt, and then washed and washed. On the basis of the reflectance of the test piece before washing and the reflectance of the test piece after washing, the cleaning rate was obtained according to the following formula (1).

D = (R _W -R ₁ / R ₀ -R ₁ ) × 100 (%) ...

Here, D is the cleaning rate, R ₁ is the reflectivity of the artificially soiled cloth before washing, R _W is the reflectance of the artificially soiled cloth after washing, and R ₀ is the reflectance of the original cloth. The artificially contaminated cloth and the experimental method are specified based on Japanese industrial specifications (electric washing machine, JIS C 9609-1993).

The washing machine of the comparative example is a washing machine that uses only a discharge opening corresponding to the front discharge portion 31a to dispense washing water or wash water. In addition, as shown in FIG. 12 (b), the contaminated cloth during the washing test is put into the area, and it is divided into five areas A to E in the front and back direction in the rotating drum, and each area is In addition, the polluted cloth was invested in the place indicated by the circle number 1 to 5 shown in FIG. 12 (a). A dummy is disposed between each of the areas A to E.

In FIG. 13, each of areas A to E in the drum-type washing machine 1 (labeled as the present embodiment in the table) and the washing machine of the comparative example (labeled as the comparative example in the table) in the present embodiment is shown. The average cleaning rate and the average cleaning rate (Ave.) of all the areas A to E are shown. Figure 14 illustrates this. As shown in FIG. 13, from the area C, which is the center area of the rotating drum, to the area A, which is further behind, the cleaning rate is generally improved.

FIG. 15 is a schematic view showing a sprayed water-spraying area in the rotating drum 4, and (a) is a display for a water-spraying area G (corresponding to a comparative example) corresponding to the front-side discharge portion 31a, ( b) It is a display for the water-spraying areas G, H (corresponding to this embodiment) corresponding to the front-side discharge portion 31a and the rear-side discharge portion 32a. In addition, the area indicated by the oblique line with the component symbol F in the figure is the area where laundry or wash water is accumulated in the drum and the clothes are directly wetted.

As is obvious from Figs. 15 (a) and (b), the water-spraying areas G and H corresponding to the front-side discharge portion 31a and the rear-side discharge portion 32a are difficult to be used for washing water or washing water. The soaked rotating drum 4 distributes washing water or washing water appropriately in the central area in the front-back direction.

In addition, the present invention is not limited to the aforementioned embodiments, and various changes can be made without changing the scope of the present invention. For example, in the present embodiment, although the rear discharge portion 32a is formed in a vertically long shape, the system is not limited to this. As long as it is a shape capable of dispersing water and allowing the washing water or washing water to penetrate, The shape is not limited.

The positions in the up-down direction and the positions in the left-right direction of the front-side ejection portion 31a and the rear-side ejection portion 32a can be appropriately set.

The flow rate discharged from the front side discharge portion 31a and the flow rate discharged from the rear side discharge portion 32a can be appropriately set.

1‧‧‧ drum type washing machine

3‧‧‧ Outer Slot

4‧‧‧Rotating drum (inner tank, drum)

4b‧‧‧ opening

4d‧‧‧ bottom face

4m‧‧‧Grid Department

31, 32‧‧‧Circulation flow path

31a‧‧‧Front ejection section (ejection section)

32b‧‧‧Back side ejection part (ejection part)

40‧‧‧Circulation pump

[Fig. 1] A perspective view showing the appearance of a drum-type washing machine of this embodiment.图 [Fig. 2] is a perspective view showing the schematic structure of the inside of the housing of the drum-type washing machine of Fig. 1. [Figure 3] is a perspective view showing the outline structure of the outer groove. [Fig. 4] is a perspective view showing the circulation flow path and the discharge portion on the bottom surface side of the outer groove.图 [Fig. 5] (a) is a rear view of the outer tank cover, and (b) is a rear view of the outer tank cover with the circulation channel exposed.图 [Fig. 6] is a partial cross-sectional side view showing the roller and the discharge portion on the bottom surface side. [Figure 7] is a front view showing the roller. [Fig. 8] It is an explanatory diagram showing one form of circulating pump, (a) is a schematic explanatory diagram when the rotation speed is low, and (b) is a case when the rotation speed is high A schematic illustration of the time. [Figure 9] (a) is an explanatory diagram showing one form of the circulating pump, (b) is a schematic explanatory diagram when the fan blade is rotated forward, and (c) is an Schematic explanatory diagram when the fan blade is reversely rotated.图 [Fig. 10] is a control block diagram of a drum type washing machine.图 [Fig. 11] It is an engineering drawing for explaining the operation process of the laundry operation. [Fig. 12] It is a diagram showing the polluted cloth input area during the washing test, (a) is an explanatory diagram showing the polluted cloth input area observed from the front of the drum, and (b) is In order to show the polluted cloth input area in the front and back direction of the drum, [Fig. 13] is a table showing the average of the cleaning rate.图 [Figure 14] is a graph showing the change of the cleaning rate in the front-rear direction of the drum. [Fig. 15] It is a diagram showing a spray spreading area, and (a) is a schematic diagram showing a spray spreading area when spraying is sprayed from a discharge part on the opening side of a drum (B) is a schematic diagram showing a spreading area when spraying is sprayed from both the opening portion side and the bottom portion side of the drum.

Claims (8)

A drum-type washing machine is characterized by comprising: an outer tank, which is used for storing water in the interior; and a concave-shaped drum, which is rotatably supported in the outer tank; and a circulation pump, which The water in the outer tank is sucked up and supplied to the circulation flow path passing through the drum, and the discharge part that discharges the water supplied to the circulation flow path is provided on the side of the opening and the bottom surface of the drum. Office. The drum-type washing machine according to item 1 of the scope of patent application, wherein the drum-type washing machine is provided with: a grid portion provided at the bottom surface portion of the drum, and configured to pass water discharged from the discharge portion through the drum; Inside. The drum-type washing machine according to item 1 of the scope of the patent application, wherein the circulation pump passes through the circulation flow path and simultaneously supplies water to the discharge portion on the opening side and the discharge portion on the bottom surface side. The drum-type washing machine according to item 1 of the patent application scope, wherein the circulation pump passes through the circulation flow path, and supplies water to the discharge portion on the opening side and the discharge portion on the bottom surface side individually. The drum-type washing machine according to item 1 of the scope of patent application, wherein the discharge portion provided at the side of the bottom surface portion is formed in an elongated shape extending above and below the drum. The drum-type washing machine according to item 1 of the scope of application for a patent, wherein the discharge unit provided at the side of the bottom surface portion is provided with a plurality. The drum-type washing machine according to item 1 of the scope of the patent application, wherein the discharge unit provided at the bottom surface side is disposed at a position higher than the water level of the water stored in the drum. The drum-type washing machine as described in item 1 of the patent application scope, wherein the system has three operation modes: an opening-side water-spraying operation mode in which water is discharged from the above-mentioned discharge portion on the opening-side side; The operation mode is to discharge water from the above-mentioned discharge portion on the bottom surface side, and the two-side water discharge operation mode is to discharge water from both the above-mentioned discharge portion on the opening portion side and the above-mentioned discharge portion on the bottom surface side.