TWI667384B - Drum washing machine - Google Patents

Abstract

[Problem] A drum type washing machine capable of improving washing performance is provided. [Solution] There are: an outer tank (3) for storing water inside; and a drum (4) having a concave cross section, which is rotatably supported in the outer tank (3); and a circulation pump ( 40), the water in the outer tank (3) is supplied to the circulation flow path (31, 32) passing through the drum (4), and the water supplied to the circulation flow path (31, 32) is discharged. The discharge portion is provided on the opening (4b) side and the bottom surface portion (4d) side of the drum (4). At the bottom surface portion (4d) of the drum (4), a mesh portion (4m) is provided. The circulation pump (40) passes through the circulation flow paths (31, 32), and simultaneously or individually supplies water to the discharge portion on the opening portion (4b) side and the discharge portion on the bottom surface portion (4d) side.

Description

Drum washing machine

The present invention relates to a drum type washing machine.

The drum type washing machine is a person who puts the laundry into a drum that is slightly horizontal or tilted toward the front side, and performs laundry, washing, and dewatering works. In the laundry and washing processes, the drum is rotated at a low speed, and the rolling of the laundry accumulated at the lower portion of the drum and falling from the upper portion of the drum is performed. By rolling over this, a mechanical force is applied to the laundry, and the washing and washing are performed. In the dehydration process, the drum is rotated at a high speed, and centrifugal dewatering is performed by pushing the moisture from the laundry to the outside of the laundry by the centrifugal force caused by the rotation.

Further, in the laundry process, there is a process in which the washing water in the washing tank (outer tank) is poured onto the clothes by the pump and sprinkled into the clothes to soak the washing water in which the lotion is dissolved into the clothes. In this way, the drum type washing machine can ensure the washing performance even when using less water than the vertical type washing machine, and it is possible to save water.

Further, if laundry is washed for a large amount of laundry at the time of washing, since the space between the clothes is narrowed, the movement of the laundry in the drum is suppressed. As a result, the degree of penetration of the washing liquid relative to the laundry at the contact portion and the non-contact portion of the washing liquid becomes uneven, and it becomes easy to cause a gap in the dirt removal of the laundry. . In this way, the presence or absence of contact with the washing liquid is a cause of insufficient washing or uneven washing.

In the prior art, the technique disclosed in Patent Document 1 is known as an invention for purifying the degree of penetration of a washing liquid. Patent Document 1 discloses a technique in which water is touched to a quilt from the front side and the rear side of the drum. This technique is to introduce the washing water by the pressure when the drum is rotated and to disperse it into the drum. [Prior Technical Literature] [Patent Literature]

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

[Problems to be solved by the invention]

However, in Patent Document 1, in order to make the water to the washing water in the drum become a water flow having a force, it is necessary to rotate the drum at a high rotation speed which causes the quilt to adhere to the inner circumferential surface of the drum. . Therefore, in a laundry process or the like, rolling of the laundry from the upper portion of the drum cannot be performed, and mechanical force cannot be applied, and washing and washing can be performed.

The present invention has been made in view of the problems of the prior art described above, and an object thereof is to provide a drum type washing machine capable of improving washing performance. [Means to solve the problem]

The present invention is characterized in that: an outer tank is provided to store water therein; and a drum having a concave cross section is rotatably supported in the outer tank; and a circulation pump is used to The water jet in the tank is supplied to the circulation flow path passing through the drum, and the discharge portion that discharges the water supplied to the circulation flow path is provided on the opening side and the bottom surface side of the drum. [Effects of the Invention]

According to the present invention, it is possible to provide a drum type washing machine capable of improving the washing performance.

Hereinafter, the form for carrying out the invention (hereinafter referred to as "embodiment") will be described in detail with reference to the drawings. In addition, in the following description, the direction of the front, back, left, and right, and the direction of the front, the back, the up-and-down, and the left side as shown in FIG.

As shown in Fig. 1, the drum type washing machine 1 is a drum type washer-dryer. As shown in FIG. 2, the inside of the drum type washing machine 1 is provided with a groove 3 which is provided with a water outside the tank 3 and a drum which is rotatably supported in the other tank 3 (inside) The groove 4 is formed by accommodating the outer tub 3 and the frame 10 of the rotary drum 4 (refer to FIG. 1).

The frame body 10 is formed to have an outer contour, and is provided with a front side face panel (front plate) 11 and a left and right side by press working on a sheet metal (metal or coated steel sheet). Side panel (side panel) 14 on the side. In addition, the frame body 10 is formed by pressing the sheet metal or the like, and is provided with a back panel (backing plate) 19 which is formed in a substantially U-shape when viewed from above and disposed on the back surface, and is disposed in the outer tub 3 The base 17 at the bottom side and the upper panel (upper plate, top panel) 18 disposed above the outer groove 3. The frame 10 includes a base 17 and presents a box shape.

The front panel 11 is provided with a front panel 12 disposed before the front upper portion and a front panel 13 disposed at a lower portion of the front surface. Further, the front panel 11 may be constituted by one panel.

At the front upper panel 12, a door 6 is mounted via a pivot. At the front lower panel 13, a cover member 13d for inserting and detaching the screen member of the wire filter (not shown) is provided. The side panel 14 is formed by press working or the like, and is formed to have the same height as the front panel 11. The back panel 19 is formed by stamping or the like.

The base 17 is made of, for example, a synthetic resin, and as shown in Fig. 2, a lattice-like rib is formed on the inner side to be reinforced. Further, at the base 17, the lower end of the side panel 14 is fixed by screws or the like.

The upper panel 18 is formed, for example, by molding a synthetic resin, and is formed into a substantially rectangular shape when viewed in plan. Further, 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 and the side panel 14 and the back panel 19.

Further, at the upper panel 18, the lotion input portion 20 is attached to the left side in the front-rear direction, and the operation panel 22 is attached to the front right side. Further, as the synthetic resin, a resin having high strength and excellent abrasion resistance can be selected, and specifically, POM (polyacetal resin) can be selected.

Further, a water supply unit (not shown, including a member connected to the water supply), a dry clothes filter 37, and the like are attached to the upper panel 18. The water supply unit (not shown) is a water supply pipe (not shown), and is supplied 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, pumping water and so on.

The outer tub 3 is formed into a cylindrical shape by a synthetic resin as shown in Figs. 2 and 3, and the rotary drum 4 is coaxially wrapped therein. The outer tub 3 is opened on the front side, and a drum motor (not shown) is attached to the outer center of the bottom surface on the rear side. The rotary shaft of the drum motor passes through the outer tub 3 and is coupled to the rotary drum 4. Further, the outer tub 3 is constituted by a grooved main body 3a having a bottomed cylindrical shape and an outer groove cover 3b which is attached to the opening of the front surface of the other groove main body 3a.

Further, a rubber bellows tube (not shown) is provided in the opening portion 3s of the outer tub 3 (outer tank cover 3b), and the outer tank 3 is closed by closing the door 6 (refer to FIG. 1). Sealed with water. The front side discharge portion 31a constituting the water discharge port on the opening side of the rotary drum 4 is provided inside the outer tank cover 3b (refer to Fig. 5 (a)).

Further, a rear side discharge portion 32a constituting a water spout on the side of the bottom surface portion 4d (refer to FIG. 7) of the rotary drum 4 is provided on the surface after the bottom surface portion 3d of the outer tub body 3a. The rear side discharge portion 32a is disposed at a position overlapping the central axis O1 of the rotary drum 4 (the central axis of the outer tub 3) as shown in FIG. 6, and is disposed at the front side discharge portion 31a. Lower position. In other words, the rear side discharge portion 32a is disposed above the water level of the water stored in the rotary drum 4. The rear side discharge portion 32a is formed in a vertically long shape extending in the upper and lower directions of the rotary drum 4. Further, the outer tub 3 is elastically supported via the damper 5 (refer to FIG. 2).

Further, at the outer side portion of the rear portion of the outer tub body 3a, as shown in Fig. 4, a water supply port 3c for supplying water and lotion to the outer tub 3 is provided. 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 portion of the outer tub 3, as shown in Figs. 2 and 3, the recessed portion 3f provided with the concave recessed portion 3f is extended in the axial direction of the outer tub 3. And was set as the setting. The lower surface of the recessed portion 3f is an inclined surface that descends toward the rear side from the front side, and a drain port 3e is provided at the rear side of the recessed portion 3f (refer to FIG. 4). A bellows hose (not shown) connected to a circulation pump 40, which will be described later, is connected to the drain port 3e. At the front side of the recessed portion 3f, a flow inlet 3k for circulating water at the bottom is provided (refer to Fig. 2).

The washing water of the outer tub 3 is sucked into the circulation pump 40 through the recess 3f. The amount of water stored in the outer tank 3 is increased by providing the recess 3f. Therefore, by increasing the rotational speed of the circulation pump 40, the large-flow 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. A substantial increase.

The drain hose 26 has one end connected to a water discharge port (not shown) of a circulation pump 40 to be described later, and the other end side thereof is exposed to the base portion as shown in FIG. 17 left rear end. At the drain hose 26, a drain valve 25 (refer to FIG. 4) is provided in the middle of extending in the casing 10.

The rotary drum 4 is a cylindrical laundry and dewatering tank that is rotatably supported. At the outer peripheral wall of the rotary drum 4, a through hole 4a for allowing a large amount of water and air to be ventilated is formed, and an opening portion 4b for allowing the laundry to enter and exit is formed at the front end surface. A fluid balancer (not shown) that rotates integrally with the rotary drum 4 is provided on the outer peripheral side of the opening 4b. Further, at the inner peripheral wall of the rotary drum 4, a lifter (not shown) for lifting the laundry when the washing operation or the drying operation is performed is provided. Further, the central axis of rotation of the rotary drum 4 is inclined so as to be slightly horizontal or to increase the height of the opening 4b.

As shown in Fig. 7, in the bottom surface portion 4d of the drum 4, a plurality of mesh portions 4m are provided at intervals in the circumferential direction. The mesh portion 4m is made of a synthetic resin that is formed independently of the rotary drum 4, and has a plurality of fine through holes (for example, a slightly square shape in which the size of the Japanese yen 1 round coin cannot be inserted). It is mounted on the bottom portion 4d. The mesh portion 4m is disposed at a bottom surface region 4f defined by the rib 4g in the circumferential direction of the bottom surface portion 4d. The mesh portion 4m is formed in a substantially trapezoidal shape corresponding to the shape of the bottom surface region 4f when viewed from the axial direction. The mesh portion 4m is disposed so as to face the rear side discharge portion 32a provided at the bottom surface portion 3d of the outer tank main body 3a as shown in Fig. 6 . The mesh portion 4m, as shown in Fig. 7, faces the protruding end 32b of the rear side discharge portion 32a. As a result, the water that has been dispersed from the rear side discharge portion 32a is dispersed into the rotary drum 4 by the mesh portion 4m. Further, the rear side discharge portion 32a is fixed to the bottom surface portion 3d of the outer tub 3 via a flange portion 32c provided at the front end portion as shown in Figs. 3 and 6 . The protruding end 32b is curved along the circumferential direction of the rotary drum 4. Further, the protruding end 32b may have a linear shape or a bent shape, and may have a shape that is curved toward the opposite side in the circumferential direction.

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

Between the outer tub 3 and the base 17, as shown in Fig. 3, a circulation pump 40, a screen casing 41, and a drain valve 25 (refer to Fig. 4) are provided. The filter case 41 is generally cylindrical as shown in FIG. 3, and has a cylindrical shape having an opening at the front side, and has a detachable filter (not shown) mounted therein to capture and collect the washing water. Foreign matter or silk. As shown in Fig. 1, the screen case 41 is capable of easily attaching and detaching the screen (not shown) by opening the lid 13d provided at the front lower panel 13 and rotating the handle 41a. This sieve 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 circulation pump 40 has a structure in which a circulation pump motor 42 is attached to a casing that is integrally formed with the screen case 41. In the casing, three first discharge ports 51, second discharge ports 52 (refer to FIG. 4), and third discharge ports 53 are formed, and water inlets and water discharge ports (not shown) are formed.

The first discharge port 51 is a first circulation flow path 31 to be described later, which is provided on the inner peripheral wall of the outer tank cover 3b via the bellows hose 51a, as shown in Fig. 3 and Fig. 4 (refer to Fig. 5 (a ), (b)) The entrance 埠 31b is connected.

Further, the bellows hose 51a and the first circulation flow path 31 are together with a bellows hose (not shown) connected to the drain port 3e (refer to FIG. 4) of the recessed portion 3f of the outer tank 3 (see FIG. 4). The ground is formed as a circulation flow path from the lower portion of the outer tub 3 to the upper portion of the outer side of the outer tub 3.

The first circulation flow path 31 is connected to the nozzle front side discharge portion 31a (see FIG. 5(a)) provided inside the outer tank cover 3b.

The second discharge port 52 is connected to the bellows hose 52a constituting the second circulation flow path 32 as shown in Fig. 4 . The bellows hose 52a is a hose which is placed upward toward the rear and is erected upward and disposed behind the bottom surface portion 3d of the outer tub 3. At the front end of the bellows hose 52a, a rear side discharge portion 32a that is connected to the rear surface of the bottom surface portion 3d of the outer tub 3 is provided.

Further, the second circulation flow path 32 formed by the bellows hose 52a is provided together with a bellows hose (not shown) connected to the drain port 3e of the recessed portion 3f of the outer groove 3, Further, a circulation flow path is formed from the bottom of the outer tub 3 to the intermediate portion on the rear side of the outer tub 3.

The third spit 埠53 is as shown in Fig. 3, via The bellows hose 33 is connected to the inflow port 3k formed in such a manner as to face the recessed portion 3f (refer to Fig. 3) at the bottom of the outer tub 3.

In a state where 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 positively, the washing water in the outer tub 3 is from the drain port 3e ( Referring to Fig. 4), a bellows hose (not shown) is passed through, and a foreign matter is removed by a sieve (not shown) in the sieve casing 41. Thereafter, 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 is sent from the second discharge port 52 to the second circulation flow path 32. In the middle, the water is dispersed into the rotating drum 4 (refer to FIG. 2) from the front side discharge portion 31a (see FIGS. 5(a) and 5(b)) and the rear side discharge portion 32a.

Further, when the circulation pump motor 42 of the circulation pump 40 is reversely rotated, the washing water in the outer tub 3 passes through the drain port 3e (refer to FIG. 4) and passes through a bellows hose (not shown) and is filtered. Foreign matter is removed by a screen (not shown) in the reticulated casing 41. Thereafter, the washing water enters the circulation pump 40, is discharged from the third discharge port 53, and is returned to the outer tub 3 via the bellows hose 33 and the inflow port 3k. Further, if the drain valve 25 is opened, the washing water in the outer tub 3 is discharged from the drain hose 26 (refer to FIG. 4) to the outside of the machine through the screen (not shown) in the screen casing 41. .

The drum-type washing machine 1 of the present embodiment includes three operation modes: one of the front-side water-spraying operation mode (opening-side water-spreading operation mode) and the rear-side water-spreading operation mode (the bottom-side partial-side water-spreading operation mode). Mode, and water running mode on both sides. The front side water-spreading operation mode is an operation mode in which water is discharged from the front side discharge unit 31a which is the opening side of the rotary drum 4. The rear side water-spreading operation mode (the bottom-surface-side water-spreading operation mode) is an operation mode in which water is discharged from the rear side discharge unit 32a which is the bottom surface side of the rotary drum 4. The water-spreading operation mode on both sides is an operation mode in which water is discharged from both the front side discharge unit 31a and the rear side discharge unit 32a.

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

Fig. 8 is an explanatory view showing one of the forms of the circulation pump, (a) is a schematic explanatory diagram when the rotation speed is low, and (b) is when the rotation speed is high. Schematic illustration. It is a schematic diagram showing the pattern of the water in the discharge part and the back side discharge part in a circulation system. When the rotation speed of the circulation pump motor 42 is changed, the head of the discharge performance of the circulation pump motor 42 is changed. If the rotation speed of the circulation pump motor 42 is low, the discharge water surface cannot be lifted up to a high position, and the head stays at a low position. On the other hand, if the rotation speed of the circulation pump motor 42 is increased, the discharge water surface is always raised to a high place. In the present embodiment, the rear side discharge portion 32a is provided at a position lower than the front side discharge portion 31a. Therefore, as shown in Fig. 8 (a), if the rotational speed of the circulation pump motor 42 is set so that the water surface can be discharged from the rear side discharge portion 32a, the rotation speed of the circulation pump motor 42 can be set by a lower rotation. The speed is to disperse water only from the rear side discharge portion 32a. On the other hand, as shown in FIG. 8( b ), when the rotational speed of the circulation pump motor 42 is set to a high rotational speed so that the water surface can be discharged from the front side discharge unit 31 a. It is possible to disperse water from the front side discharge portion 31a in addition to the rear side discharge portion 32a. That is, by adjusting the rotational speed of the circulation pump motor 42, it is possible to change the state of the water dispersion.

On the other hand, by adopting a configuration in which the rear side discharge portion 32a is provided at a position higher than the front side discharge portion 31a, it is possible to provide only the front side discharge portion 31a by the lower rotation speed. And the composition of water as a dispersion of water. In addition, when the rotational speed of the circulation pump motor 42 is set to a high rotational speed so that the discharge surface of the circulating pump motor 42 can be discharged from the rear side discharge portion 32a, the front discharge portion 31a can be further removed from the front discharge portion 31a. The rear side discharge portion 32a disperses water.

Further, the rotational speed of the circulation pump motor 42 is controlled by the control device 38 (refer to FIG. 10) provided in the casing 10.

In addition, by changing the configuration of the circulation pump 40, it is possible to provide a front-side water-spreading operation mode (opening-side water-spreading operation mode) and a rear-side water-spreading operation mode (bottom-side water-spreading operation mode) and both sides of the water. The drum type washing machine 1 of the three operation modes of the operation mode.

Fig. 9(a) is an explanatory view showing one of the forms of the circulation pump, (b) is a schematic explanatory view when the blade is rotated positively, and (c) is for making Schematic illustration of the case where the fan blade is reversely rotated. In the circulation pump 40, the first discharge port 51 and the second discharge port 52 are provided. Further, in the circulation pump 40, stoppers 48 and 49 for controlling the flow rate are provided. The stopper 48 is mainly configured such that when the blade 45 is rotated in the X1 direction in the drawing, the flow rate to the first discharge port 51 becomes a flow rate closer to the second discharge port 52. More ways to be the controller. Further, the stopper 49 mainly rotates the blade 45 toward the X2 direction in the drawing so that the flow rate to the second discharge port 52 flows to the first discharge port 51. Traffic and more ways to act as controllers.

As shown in Fig. 9(b), by rotating the circulation pump motor 42 in the direction of the arrow X1 in the figure, the flow rate toward the first discharge port 51 can be increased. By this, it is possible to perform the water-spreading-side water-spreading operation mode only from the front-side discharge portion 31a. On the other hand, as shown in Fig. 9(c), by rotating the circulation 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. By this, it is possible to perform the water-spreading side water-spreading operation mode only from the rear-side discharge portion 32a.

In addition, by performing the operation of switching the rotation directions of the circulation pumps 42 alternately, it is possible to perform the water-spreading operation modes on both sides of the water from both the front side discharge unit 31a and the rear side discharge unit 32a. In this case, by setting the timing for switching, it is possible to perform the laundry and washing processes in an operation mode in which the preceding and succeeding water is intermittently performed and an operation mode in which the preceding and succeeding water are slightly continuously performed.

Further, by appropriately setting the shape of the stoppers 48, 49 or the amount of protrusion in the urging, even when the blade 45 is rotated in a single direction, it can be adapted to the circulation pump 40. In the state in which the water is dispersed only from the front side discharge portion 31a or from both the front side discharge portion 31a and the rear side discharge portion 32a, the water is simultaneously dispersed.

Figure 10 is a control block diagram of a drum type washer-dryer. As shown in FIG. 10, the control unit 38 is provided with a microcomputer 38a, a drive circuit 64, and the like, and is also provided with ON and OFF signals of the switches 12a and 12b of the operation keys 22 shown in FIG. The input circuit of the output signal from the detector (water level sensor 34, temperature sensor 62) and the like. Further, the control device 38 acquires various information signals of the user's operation and the washing process (laundry work, washing work, dewatering work), and drying work through the microcomputer 38a. Further, the control device 38 controls the microcomputer 38a via the drive circuit 64 with the drum motor 4j, the water supply solenoid valve 16, the drain valve 25, and the circulation pump 40. Further, in order to inform the user of the information relating to the drum type washer-dryer, the display 12c, the light-emitting element 66 or the buzzer 67 is controlled.

The lotion water supply solenoid valve 16b supplies tap water from the water supply hose connection port 18f (refer to FIG. 1) to a lotion supply chamber (not shown) of the lotion tray through a water supply path (not shown). . The tap water supplied to the lotion supply chamber is filled with water into the outer tub 3 (refer to FIG. 2) via the lotion container or the bellows hose together with the put-on lotion.

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

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

The cooling water supply solenoid valve 16e is a water-cooling dehumidifying mechanism (not shown) that supplies water from the water supply hose connection port 18f to the dry clothes line through a water supply path (not shown).

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

≪Operational Engineering ≫ Next, with reference to Fig. 11, an operation of the drum type washer-dryer will be described. Fig. 11 is a view showing the operation of the washing operation (laundry to washing-dehydration) in the drum-type washer-dryer according to the first embodiment. In the following, the lotion supply solenoid valve 16b is used as the first solenoid valve, and the finisher water supply solenoid valve 16c is used as the second solenoid valve, and the outer tank water supply solenoid valve 16d is used as the third solenoid valve, and the cooling water is used. The water supply solenoid valve 16e will be described as a fourth electromagnetic valve.

As shown in Fig. 11, in step S1, the control unit 38 accepts the input of the stroke selection (stroke selection) of the operation of the drum type washer-dryer. Here, the user opens the door 6 and puts the laundry inside the rotary drum 4 for washing, and closes the door 6. Thereafter, the user selects the stroke of the operation project and inputs it by operating the operation switches 12a and 12b. The operation of the selected operation is input to the control device 38 by operating the switches 12a, 12b. The control device 38 reads the corresponding operation form from the operation form database based on the entered travel schedule, and proceeds to step S2. In the following description, the standard stroke (washing to washing twice to dehydrating) is described.

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

In step S3, the control device 38 executes a process of calculating the washing amount and the operation time. Specifically, the control device 38 controls the water supply solenoid valve 16 (for example, opens the third electromagnetic valve), and directly supplies water to the water supply port 3c of the outer tub 3. Further, although not shown, the control device 38 detects the electrical conductivity (hardness) of the water supplied through the electrical conductivity sensor (not shown) disposed at the bottom of the outer tank 3. ). Further, the temperature of the water to be supplied is detected by the temperature sensor 62 (refer to Fig. 10). Thereafter, the water supply solenoid valve 16 is controlled (for example, the third electromagnetic valve is closed), and the water supply to the outer tank 3 is ended.

The control device 38 determines the amount of washing and the running time to be input based on the amount of cloth detected in step S2, the electrical conductivity (hardness) of water, and the temperature of water, by means of a map search. Thereafter, the control device 38 displays the determined washing amount and operation time on the display 12c. In addition, although the water supply is performed as the outer tank 3 and the electrical conductivity (hardness) of water and the water temperature are detected, it is not limited to this. For example, the electrical conductivity (hardness) and water temperature of the water during the previous operation may be previously stored in the memory portion (not shown) of the microcomputer 38a, and used.

In step S4, the control device 38 performs a lotion injection waiting process. For example, the control device 38 waits for a specific time and proceeds to step S5. The user, while waiting for a reference to the wash dose displayed at the display 12c, loads the lotion into the lotion tray. In addition, the control device 38 may be regarded as having been turned off by the means for detecting the opening and closing of the detergent tray (not shown) when the detergent tray is closed after being opened. The lottery is put in, and the process proceeds to 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, opens the first electromagnetic valve), and supplies water to the lotion supply chamber via the water supply pipe. The lotion into the chamber and the water are supplied through the lotion delivery tube, the bellows hose, the water supply port 3c at the upper portion of the rear side of the outer tank 3, and the water supply path formed at the inner surface of the bottom wall of the outer tank 3. From the outlet thereof, it flows into the recessed portion 3f of the outer tub 3. If the water is supplied to the specific amount of water all the time, the control device 38 controls the water supply solenoid valve 16 (for example, the first electromagnetic valve is closed) and stops the water supply. Thereafter, the control device 38 performs a lotion dissolution operation.

Specifically, the control device 38 controls the circulation pump 40, and the water and the lotion sucked from the drain port 3e via the bellows hose are supplied from the recess 3f through the bellows hose 33. And spit it out. The water and the lotion discharged from the inflow port 3k flow in the recessed portion 3f, and travel toward the drain port 3e to be circulated. Thereby, the water and the lotion are stirred, and the lotion is dissolved in water. If a certain time (for example, 10 seconds) elapses, the control device 38 stops the cycle 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 electromagnetic valve and the third electromagnetic valve) to raise the water level of the washing water in the outer tub 3, and for the drum motor 4j is controlled to rotate the rotary drum 4 at a specific rotational speed (for example, 40 rpm [r/min]) in the forward and reverse directions to perform mixing of the laundry. Further, the control device 38 controls the circulation pump 40 (the circulation pump motor 42) to have a specific rotation speed, and the concentration of the lotion sucked from the drain port 3e is high. The front side discharge portion 31a and the rear side discharge portion 32a provided at the opening of the outer tub 3 are discharged into the inside of the rotary drum 4, whereby they are infiltrated into the laundry inside the rotary drum 4.

In this case, the control device 38 interactively controls the rotational speed of the circulation pump 40 to a low rotational speed and a high rotational 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 lowered, and for example, only from the rear side discharge portion 32a and the inside of the rotary drum 4 Spit out the washing water.

On the other hand, if the rotational speed of the circulation pump 40 is controlled to a high rotational speed (for example, 2000 rpm), the amount of water in the washing water is increased, and the head system is increased, and the front side discharge portion 31a and the rear side discharge portion 32a are provided. Both sides discharge the washing water to the inside of the rotary drum 4.

In the rotary water supply project, as described above, the rotational speed of the circulation pump 40 is interactively controlled to a low rotational speed and a high rotational speed by the control device 38. Therefore, in the rotary water supply project, only the laundry water to be discharged is discharged from the rear side discharge portion 32a, or is discharged from both the front side discharge portion 31a and the rear side discharge portion 32a. That is, the laundry water system is sequentially dispersed. Thereby, it is possible to saturate the washing water into the laundry inside the rotary drum 4 without fail. Further, the control of the control device 38 may be such that the rotational speed of the circulation pump 40 is alternately controlled to a low rotational speed and a high rotational speed at a specific interval, or may be set so as to be held in one of the rotations. The speed is longer than the other and becomes a longer way to control the controller.

Thereafter, if the water level of the washing water in the outer tub 3 rises to a specific water level (middle water level), the water supply is stopped (for example, the first electromagnetic valve and the third electromagnetic valve are closed). If a certain period of time has elapsed since the start of the rotation of the water supply project, the rotary water supply project is terminated, and the process proceeds to step S7.

In step S7, the control device 38 performs a pre-washing agitation process. In addition, the pre-washing and stirring process is a process of immersing laundry in a washing water having a high concentration of a lotion generated by a lotion dissolution process. The washing power is increased by soaking the laundry in the washing water having a high lotion concentration.

Specifically, the control device 38 alternately controls the rotational speed of the circulation pump 40 to a low rotational speed (for example, 1800 rpm) and a high rotational speed (for example, 2000 rpm), and the washing water sucked from the drain port 3e, The front side discharge portion 31a and the rear side discharge portion 32a of the outer tub 3 are discharged to the inside of the rotary drum 4. In this case as well, since the rotational speed of the circulation pump 40 is alternately controlled to a low rotational speed and a high rotational speed, the laundry water is discharged only from the front side (or only from the rear side), or It is to spit out from the front and rear sides. By this, it is possible to saturate the laundry water having a high lotion concentration into the laundry inside the rotary drum 4 without fail.

Further, the control device 38 rotates the rotary drum 4 at a specific rotational speed (for example, 80 rpm) by controlling the drum motor 4j, so that the centrifugal force with respect to the laundry exceeds the gravity, and the rotary drum 4 is caused. The internal laundry is attached to the inner peripheral wall surface of the rotary drum 4 so that the laundry does not fall from above the rotary drum 4. In other words, in the pre-washing and stirring process, when the laundry is not dropped from above the rotary drum 4, it is generated when it is not applied to the laundry and is dropped from above the rotary drum 4. Mechanical force.

In the preparatory washing and stirring process of the present embodiment, the rotary drum 4 is rotated in the forward direction. However, the rotary drum 4 may be rotated in the reverse direction or in both the forward and reverse directions. If a certain period of time (for example, 3 minutes) has elapsed, the control unit 38 ends the preparatory laundry agitation process and proceeds to step S8.

In step S8, the control device 38 performs a formal laundry agitation process. In the formal laundry mixing project, for example, a laundry and a laundry project are carried out. The so-called tapping laundry is to lift the laundry accumulated in the lower portion of the rotary drum 4 by the rotation of the rotary drum 4, and the gravity is made larger than the centrifugal force of the laundry to make the laundry The upper portion of the rotary drum 4 is dropped and dropped, whereby a mechanical force is applied to the laundry.

Specifically, the control device 38 alternately controls the rotational speed of the circulation pump 40 to a low rotational speed (for example, 1800 rpm) and a high rotational speed (for example, 2000 rpm), and the washing water sucked from the drain port 3e, The front side discharge portion 31a and the rear side discharge portion 32a of the outer tub 3 are discharged to the inside of the rotary drum 4. In this case as well, since the rotational speed of the circulation pump 40 is alternately controlled to a low rotational speed and a high rotational speed, the laundry water is discharged only from the front side (or only from the rear side), or It is to spit out from the front and rear sides. By this, it is possible to saturate the laundry water having a high lotion concentration into the laundry inside the rotary drum 4 without fail. Further, the control device 38 performs the tapping of the laundry inside the rotary drum 4 by controlling the drum motor 4j and rotating the rotary drum 4 at a specific rotational speed (for example, 40 rpm) in the forward and reverse directions. . If a certain period of time (for example, 5 minutes) has elapsed, the control unit 38 ends the tapping of the laundry and proceeds to the laundry process.

In the so-called "drying", the laundry accumulated under the rotary drum 4 is rolled on the inner peripheral wall surface of the rotary drum 4 by the rotation of the rotary drum 4 (the laundry is not dropped). A project that is weaker than the mechanical force of the laundry. In other words, in the laundry process, the laundry is moved while the clothes are rolled around the lower portion of the rotary drum 4.

Specifically, the control device 38 alternately controls the rotational speed of the circulation pump 40 to a low rotational speed (for example, 1800 rpm) and a high rotational speed (for example, 2000 rpm), and the washing water sucked from the drain port 3e, The front side discharge portion 31a and the rear side discharge portion 32a of the outer tub 3 are discharged to the inside of the rotary drum 4. In this case as well, since the rotational speed of the circulation pump 40 is alternately controlled to a low rotational speed and a high rotational speed, the laundry water is discharged only from the front side (or only from the rear side), or It is to spit out from the front and rear sides. Thereby, it is possible to saturate the washing water into the laundry inside the rotary drum 4 without fail. Further, the control device 38 is rotated in the forward and reverse directions by controlling the drum motor 4j and rotating the rotary drum 4 at a specific rotation speed (for example, 30 rpm) which is lower than the rotation speed at the time of the laundry operation ( For example, the rotary drum 4 is reversed left and right at a rotation angle of 20 to 60 Torr, and the laundry inside the rotary drum 4 is subjected to washing. Moreover, if a predetermined time (for example, one minute) elapses, the control device 38 ends the laundry process and proceeds to the washing 1 project (steps S9 to S12).

In step S9, the control device 38 performs a drainage project. 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 tub 3. The water level sensor 34 continuously monitors the water level of the wash water in the outer tank 3 in the drain. If the detected value of the water level sensor 34 is lower than the specific water level, the control device 38 ends the drainage work and proceeds to step S10.

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

In step S11, the control device 38 executes a rotary shower project. The control device 38 closes the drain valve 25 while rotating the rotary drum 4 in the reverse direction (for example, 260 rpm), and controls the water supply solenoid valve 16 (for example, the third solenoid valve is opened) Valve), and water is used to disperse the clothes. The control time of the water supply solenoid valve 16 (third electromagnetic valve) at this time is determined based on the amount of cloth detected in step S2. If a certain period of time has elapsed, the water supply is stopped (for example, the third solenoid valve is closed).

Further, the control device 38 alternately controls the rotational speed of the circulation pump 40 to a low rotational speed (for example, 1800 rpm) and a high rotational speed (for example, 2000 rpm), and the washing water sucked from the drain port 3e is externally The front side discharge portion 31a and the rear side discharge portion 32a of the tank 3 are discharged to the inside of the rotary drum 4. In this case as well, since the rotational speed of the circulation pump 40 is alternately controlled to a low rotational speed and a high rotational speed, the laundry water is discharged only from the front side (or only from the rear side), or It is to spit out from the front and rear sides. Thereby, it is possible to disperse the washing water to the laundry inside the rotary drum 4 without fail. If a certain period of time has elapsed, the circulation pump 40 is stopped, and the drain valve 25 is opened to drain the washing water in the outer tank 3.

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

In step S13, the control device 38 performs a water supply project. The control device 38 closes the drain valve 25 and controls the water supply solenoid valve 16 (for example, opens the first solenoid valve), and supplies the washing water to the outer tank 3. When the water level is raised to a specific water level, the water supply is stopped (for example, the first electromagnetic valve is closed), and the control device 38 ends the water supply process, and the process proceeds to step S14.

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

In step S15, the control device 38 executes the rotary water supply and the supplementary water project. The control device 38 controls the water supply solenoid valve 16 (for example, opens the first electromagnetic valve and the third electromagnetic valve), and supplies water to the outer tub 3. If the water supply is always supplied to a specific water level, the water supply is stopped (for example, the first electromagnetic valve and the third electromagnetic valve are closed). Moreover, the control device 38 controls the drum motor 4j while rotating the water, and rotates the rotary drum 4 in the forward and reverse directions (for example, 40 rpm).

Further, the control device 38 alternately controls the rotational speed of the circulation pump 40 to a low rotational speed (for example, 1800 rpm) and a high rotational speed (for example, 2000 rpm), and the washing water sucked from the drain port 3e is externally The front side discharge portion 31a and the rear side discharge portion 32a of the tank 3 are discharged to the inside of the rotary drum 4. In this case, since the rotational speed of the circulation pump 40 is alternately controlled to a low rotational speed and a high rotational speed, the washing water containing the soft finishing agent is discharged only from the front side (or only from the rear side). Or it is to spit out from the front and rear sides. Thereby, the soft finish can be allowed to permeate into the laundry inside the rotary drum 4 without any omission.

In step S16, the control device 38 performs a washing and agitating process. The washing and agitation process is the same as the tapping of the laundry, and the laundry accumulated in the lower portion of the rotary drum 4 is lifted by the rotation of the rotary drum 4, and the gravity is more relatively centrifugal force with respect to the laundry. The next thing, the work of dropping the laundry from above the rotary drum 4.

Specifically, the control device 38 controls the drum motor 4j to rotate the rotary drum 4 (for example, 40 rpm). Thereafter, the control device 38 alternately controls the rotational speed of the circulation pump 40 to a low rotational speed (for example, 1800 rpm) and a high rotational speed (for example, 2000 rpm), and the washing water sucked from the drain port 3e is from the previous The side discharge portion 31a and the rear side discharge portion 32a are discharged to the inside of the rotary drum 4, and the laundry is washed. In this case as well, since the rotational speed of the circulation pump 40 is alternately controlled to a low rotational speed and a high rotational speed, the washing water system is discharged only from the front side (or only from the rear side), or It is to spit out from the front and rear sides. Therefore, the washing of the clothes is promoted. Thereafter, if a certain period of time has elapsed, the control device 38 ends the washing and agitation process and proceeds to the dehydration process (steps S17 and S18).

In step S17, the control device 38 performs a drainage project. 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 tub 3. The water level sensor 34 continuously monitors the water level of the wash water in the outer tank 3 in the drain. If the detected value of the water level sensor 34 is lower than the specific water level, the control device 38 ends the drainage work and proceeds to step S18.

In step S18, the control device 38 performs 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) to centrifugally dewater the laundry. Thereafter, when a predetermined time elapses, the control device 38 stops the drum motor 4j and closes the drain valve 25 to end the washing course (laundry-washing-dehydration).

As described above, in the drum washing machine of the present embodiment, in the operation, the rotational speed of the circulation pump 40 is alternately controlled to a low rotation speed and a high rotation speed, and the washing water or the water to be sucked from the drain port 3e or The cleaned water is discharged from the front discharge portion 31a and the rear discharge portion 32a to the inside of the rotary drum 4. Thereby, it is possible to include the washing water or the washing water in the laundry without fail. Therefore, it is possible to ensure high cleaning performance while suppressing the cost without using a large circulation pump. Further, the rotation speed of the rotary drum 4 can be set to a desired speed, and washing and washing by the rolling can be performed.

Here, the reason why the high washing performance can be ensured is, for example, in the case of the official laundry agitation, the laundry is soaked in the entire washing machine by the rotation of the rotary drum 4 In the middle state, the laundry is dropped, and therefore, the laundry water contained in the laundry is pushed out from the laundry together with the dirt by the impact at the time of the fall (slap laundry). Further, since the washing water is impregnated into the entire laundry, the washing agent can be diluted with good efficiency during washing, and the washing performance is also improved.

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

The circulation pump 40 can supply the washing water or the washing water to the front side discharge unit 31a and the rear side discharge unit 32a through the circulation flow paths 31 and 32. Thereby, it is possible to include the washing water or the washing water in the laundry without fail. Therefore, it is possible to ensure high cleaning performance while suppressing the cost without using a large circulation pump.

The circulation pump 40 is capable of individually supplying the washing water or the washing water to the front side discharge unit 31a and the rear side discharge unit 32a through the circulation flow paths 31 and 32. Thereby, it is possible to include the washing water or the washing water in the laundry without fail. Therefore, it is possible to ensure high cleaning performance while suppressing the cost with good efficiency.

The rear side discharge portion 32a is formed in a vertically long shape extending in the upper and lower directions of the rotary drum 4. Thereby, the washing water or the washing water can be efficiently dispersed in the upper and lower directions in the rotary drum 4. Thereby, it is possible to include the washing water or the washing water in the laundry without fail. Further, the rear side discharge portion 32a may be provided in plural. For example, the rear side discharge portion 32a may be disposed in plural in the up-down direction, the radial direction, or the circumferential direction of the rotary drum 4. In this case, it is possible to ensure a higher washing performance.

Further, the rear side discharge portion 32a is disposed at a higher level than the water level of the water stored in the rotary drum 4. By this, it is possible to efficiently disperse the washing water or the washing water with respect to the laundry in the rotary drum 4 at a position where it is not immersed in the accumulated water. Therefore, it is possible to ensure high washing performance with good efficiency.

Further, it is provided with three operation modes including a front side water dispersion operation mode, a rear side water dispersion operation mode, and two side water dispersion operation modes. Therefore, it is possible to select an appropriate washing mode in accordance with the degree of soiling of the laundry or the amount of the laundry, and perform efficient washing.

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

D=(R _W -R ₁ /R ₀ -R ₁ )×100(%)・・・・1

Here, D is the washing rate, R ₁ is the artificial contamination cloth reflectance before washing, R _W is the artificial contamination cloth reflectance after washing, and R ₀ is the original cloth reflectance. The artificially contaminated cloth and the experimental method are defined based on the Japanese Industrial Standard (Electric Washing Machine, JIS C 9609-1993).

In the washing machine of the comparative example, a washing machine that disperses washing water or washing water from only the discharge port corresponding to the front side discharge portion 31a is used. Further, as shown in Fig. 12(b), the contaminated cloth in the cleaning test is put into the region, and is divided into five regions A to E in the front and rear directions in the rotary drum, and for each of the regions. The contaminated cloth is put into the place of the circle numbers 1 to 5 shown in Fig. 12 (a). Further, a dummy cloth is disposed between the respective regions A to E.

In the drum-type washing machine 1 of the present embodiment (indicated in the present embodiment) and the washing machine of the comparative example (indicated as a comparative example in the table), each of the regions A to E in the present embodiment is shown in FIG. The average washing rate and the average washing rate (Ave.) of all the areas A to E are displayed. Figure 14 is for the purpose of charting this. As shown in Fig. 13, in general, from the area C which is the center of the rotary drum to the area A which is rearward and rearward, the washing rate is improved as a whole.

Fig. 15 is a schematic view showing a water-spraying area of the shower in the rotary drum 4, and (a) is a display for the water-spraying area G (corresponding to a comparative example) corresponding to the front-side discharge portion 31a, ( b) is a display for the water-spraying regions G and H (corresponding to the present embodiment) corresponding to the front side discharge portion 31a and the rear side discharge portion 32a. In addition, in the figure, the area of the oblique line indicated by the symbol F is the area where the laundry water or the washing water accumulated in the drum is directly wetted by the laundry.

As is apparent from Fig. 15 (a) and (b), the water-spraying regions 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 saturated rotating drum 4 is appropriately dispersed in the central region of the front and rear directions to disperse the washing water or the washing water.

In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in the present embodiment, the rear side discharge portion 32a is formed into a vertically long shape. However, the present invention is not limited thereto, and the shape is such that the water can be dispersed and the washing water or the washing water is allowed to permeate. It is not limited to the shape.

Further, the position in the up-down direction and the position in the left-right direction of the front side discharge portion 31a and the rear side discharge portion 32a can be appropriately set.

Moreover, the flow rate discharged from the front side discharge unit 31a and the flow rate discharged from the rear side discharge unit 32a can be appropriately set.

1‧‧‧Drum washing machine

3‧‧‧ outer trough

4‧‧‧Rotating drum (inner groove, drum)

4b‧‧‧ openings

4d‧‧‧ bottom part

4m‧‧‧Mesh Department

31, 32‧‧‧Circular flow path

31a‧‧‧ Front spit (spit)

32a‧‧‧Sow side spout (spit part)

40‧‧‧Circular pump

Fig. 1 is a perspective view showing the appearance of a drum type washing machine of the present embodiment. Fig. 2 is a perspective view showing a schematic configuration of the inside of a casing of the drum type washing machine of Fig. 1. Fig. 3 is a perspective view showing the schematic construction of the outer groove. Fig. 4 is a perspective view showing the discharge flow path and the discharge portion on the bottom surface side of the outer groove. Fig. 5 (a) is a rear view of the outer tank cover, and (b) is a rear view of the outer tank cover for exposing the circulation flow path. Fig. 6 is a partial cross-sectional side view showing the drum and the discharge portion on the bottom surface side. [Fig. 7] is a front view showing the drum. [Fig. 8] is an explanatory diagram showing one of the forms of the circulation pump, (a) is a schematic explanatory diagram when the rotation speed is low, and (b) is a case where the rotation speed is high. Schematic diagram of the time. [Fig. 9] (a) is an explanatory diagram showing one of the forms of the circulation pump, (b) is a schematic explanatory diagram when the blade is rotated positively, and (c) is a A schematic illustration of the case where the fan blade is reversely rotated. [Fig. 10] A control block diagram of a drum type washing machine. [Fig. 11] A drawing showing the operation of the laundry operation. [Fig. 12] is a diagram showing the area of the contaminated cloth input during the washing test, and (a) is an explanatory view showing the area of the contaminated cloth input viewed from the front side of the drum, (b) An explanatory diagram for displaying the area of the contaminated cloth in the rear direction of the drum, [Fig. 13] is a table showing the average of the washing rates. Fig. 14 is a graph showing changes in the washing rate in the front-rear direction of the drum. [Fig. 15] is a view showing a scattering area of the shower, and (a) is a schematic view showing a scattering area when the shower is spread from the discharge portion on the opening side of the drum. (b) is a schematic view showing a scattering area when the shower is spread from the discharge portions on both the opening side and the bottom surface side of the drum.

Claims (7)

A drum type washing machine characterized in that: an outer tank is provided for storing water therein; and a drum having a concave cross section is rotatably supported in the outer tank; and a circulation pump is used The water in the outer tank is supplied to the circulation flow path passing through the drum; and the mesh portion is provided at the bottom surface portion of the drum, and is configured to pass water discharged from the discharge portion through the foregoing In the drum, the discharge portion that discharges the water supplied to the circulation flow path is provided on the opening side and the bottom surface side of the drum. In the drum type washing machine according to the first aspect of the invention, the circulation pump is configured to simultaneously supply water to the discharge unit on the opening side and the discharge unit on the bottom surface side through the circulation flow path. In the drum type washing machine according to the first aspect of the invention, the circulation pump is configured to supply water to the discharge unit on the opening side and the discharge unit on the bottom side side by the circulation flow path. The drum type washing machine according to the first aspect of the invention, wherein the discharge portion provided on the side of the bottom surface portion is formed in a vertically long shape extending upward and downward from the drum. The drum type washing machine according to the first aspect of the invention, wherein the discharge unit provided on the side of the bottom surface portion is provided in plurality. The drum type washing machine according to the first aspect of the invention, wherein the discharge portion provided on the side of the bottom surface portion is disposed above a water level of water stored in the drum. The drum-type washing machine according to the first aspect of the invention, wherein the three-stage operation mode is: an opening-side water-spreading operation mode in which water is discharged from the discharge portion on the opening side; and the bottom surface side is separated from water. In the operation mode, water is discharged from the discharge portion on the bottom surface side, and in the water-spreading operation mode on both sides, water is discharged from both the discharge portion on the opening side and the discharge portion on the bottom surface side.