JP6670711B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine for washing clothes and the like.

  2. Description of the Related Art As a washing machine, a drum-type washing machine having a drum which is inclined substantially horizontally or with its front facing upward is known. The drum-type washing machine is configured to perform a washing step, a rinsing step, and a dehydrating step by putting clothes in a drum that is inclined substantially horizontally or with the front facing upward. In the washing step and the rinsing step, a tumbling operation is performed in which the drum is rotated at a low speed, and the clothes collected in the lower portion of the drum are lifted and dropped from the upper portion of the drum. By this tumbling operation, the clothes are washed and rinsed by applying a mechanical force to the clothes. In the dehydration step, the drum is rotated at a high speed, and centrifugal dehydration is performed in which moisture is pushed out of the clothing by the centrifugal force of the rotation.

  Further, in the washing step, the washing water in the washing tub (outer tub) is pumped up by the circulation pump and applied to the clothes, so that the washing water in which the detergent is dissolved permeates the clothes. As described above, the drum-type washing machine is capable of securing washing performance with less water as compared with the vertical washing machine and saving water.

  Patent Literature 1 discloses a drum-type washing machine that performs tumbling washing (slap washing).

JP 2013-199134 A

  However, there is a problem that the clothes are damaged when tumbling washing (slap washing) is performed as in Patent Document 1. Therefore, the mechanical force applied to the clothing has been reduced by shortening the rotation time of the drum or reducing the rotation speed of the drum to control the rotation of the drum to lower the falling height of the clothing.

  For example, there is a method in which the laundry is immersed in water in the drum while the drum is stopped. However, in this method, the detergent liquid does not penetrate into a portion exposed from the water surface, and a sufficient detergency cannot be obtained. In addition, since washing is performed without mechanical force, soaking requires a long period of time to obtain cleaning power.

  In addition, there is a method of controlling the drum to rotate intermittently for a short period of time. However, in this method, a sufficient cleaning power cannot be obtained because the mechanical force applied to the clothes is short. If the washing time is extended to obtain the cleaning power, the mechanical force accumulated in the clothes also increases, and the clothes are damaged.

  In addition, there is a method of controlling the clothes to rotate at a speed at which the clothes roll at the bottom of the drum, but there is a problem that the cleaning power is reduced.

  Then, an object of the present invention is to provide a washing machine which has sufficient washing power while suppressing damage to clothes.

The washing machine of the present invention has an outer tub for storing water therein, a drum rotatably supported in the outer tub and containing clothes, a drum motor for rotating the drum, and a drum motor for rotating the drum. A water supply means for supplying water, a circulating pump for supplying water drawn from the outer tub to a circulating flow path leading into the drum, and a control device capable of executing the washing operation by controlling the drum motor and the circulating pump Wherein the control device executes a first washing step as a pre-washing and stirring step and a second washing step as a main washing and stirring step, and in the second washing step, clothes move inside the drum. and massaging washing operation of moving as rolling, soft swatter wash operation by dropping the clothes from lower than the uppermost position in the drum to a tumbling operation, and the execution, only the massaging washing operation and the soft bashing wash operation At a certain time Performed alternately, the amount of water in the first washing step and be less than the second washing step.

  ADVANTAGE OF THE INVENTION According to this invention, the washing machine which secured the washing power can be provided, suppressing the damage of clothing.

1 is an external perspective view showing a drum type washing and drying machine to which a washing machine according to a first embodiment of the present invention is applied. It is a side view which shows schematically the internal structure of the housing | casing of the drum type washing and drying machine of FIG. It is a perspective view showing a circulation pump and a circulation channel. (A) is a perspective view showing a circulation channel provided in the outer tank cover, and (b) is a perspective view showing a bellows hose connecting a circulation pump and a circulation channel provided in the outer tank cover. (A) is a rear view of the outer tank cover, and (b) is a rear view of the outer tank cover exposing the circulation channel. (A) is an enlarged rear view showing the vicinity of the discharge port of the circulation flow path of the outer tank cover, and (b) is a schematic view showing a mounting structure of a watering member. 5A is an enlarged cross-sectional view of the vicinity of the discharge port along the line AA in FIG. 5A, and FIG. 5B is an enlarged perspective view of the vicinity of the discharge port along the line AA of FIG. (A) is a cross-sectional view showing the operation of the water sprinkling member when the flow rate of the washing water flowing through the circulation flow path is small, and (b) is a sectional view of the water sprinkling member when the flow rate of the washing water flowing through the circulation flow path is large. It is sectional drawing which shows an effect | action. It is explanatory drawing which shows the direction of water spraying in a drum. It is a control block diagram in a drum type washing and drying machine. FIG. 4 is a process diagram illustrating an operation process of a washing operation. It is a figure which shows the principal part of the drum type washing and drying machine to which the washing machine of 2nd Embodiment of this invention is applied, (a) is a cross section near the discharge port corresponding to the AA line of FIG.5 (a). In the figure, a cross-sectional view showing the operation of the water spray member when the flow rate of the washing water flowing through the circulation flow path is small, and (b) is the operation of the water spray member when the flow rate of the wash water flowing through the circulation flow path is high. FIG. It is a figure which shows the principal part of the drum type washing-drying machine to which the washing machine of 3rd Embodiment of this invention is applied, (a) is a schematic cross section which shows the discharge port vicinity of a circulation flow path, (b) is the same. FIG. 4B is a schematic cross-sectional view showing the operation of the water sprinkling member when the flow rate of the washing water flowing through the circulation channel is small. FIG. 4B shows the operation of the water sprinkling member when the flow rate of the washing water flowing through the circulation channel is large. It is a schematic cross section. It is a figure which shows the modification of the principal part of the drum type washing dryer to which the washing machine of this invention is applied, (a) is an enlarged rear surface of the 1st modification which shows the vicinity of the discharge opening of the circulation flow path of an outer tub cover. FIG. 7B is an enlarged rear view of the second modified example. It is a figure which shows the modification of the principal part of the drum type washing dryer to which the washing machine of this invention is applied, and is an enlarged rear view of the 3rd modification which shows the vicinity of the discharge opening of the circulation flow path of an outer tub cover. It is a figure which shows the modification of the principal part of the drum type washing dryer to which the washing machine of this invention is applied, and is an enlarged rear view of the 4th modification which shows the vicinity of the discharge opening of the circulation flow path of an outer tub cover.

  Next, a washing machine according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the following description, an example in which the present invention is applied to a drum-type washing / drying machine (drum-type washing machine) will be described, but is not intended to limit the washing machine to which the present invention is applied. In each embodiment, the same portions are denoted by the same reference numerals, and overlapping description will be omitted. In the following description, the front, rear, up, down, left, and right directions are based on the front, rear, up, down, left, and right directions shown in FIG.

  First, an overall configuration of a drum type washing and drying machine will be described mainly with reference to FIGS. 1 and 2.

(1st Embodiment)
As shown in FIG. 1, the housing 1 forms an outer shell, and includes left and right side plates 1a and 1b, a front cover 1c, a rear cover 1d (see FIG. 2), an upper cover 1e, a lower front cover 1f, and a base. 1h. In the housing 1, the left and right side plates 1a and 1b are connected by a U-shaped upper reinforcing member 36 (see FIG. 2), a front reinforcing member 37 (see FIG. 2), and a rear reinforcing member (not shown). And has a box shape including the base 1h.

  At substantially the center of the front cover 1c, a door 9 that closes a slot for taking in and out clothes is provided. The door 9 is supported by a hinge 9c (see FIG. 2) provided on the front reinforcing member 37 (see FIG. 2) so as to be openable and closable. The door 9 is unlocked and opened by operating a handle 9 d provided on the door 9, and is locked and closed by pressing against the front cover 1 c. The front reinforcing member 37 (see FIG. 2) has a circular opening through which clothes are taken in and out, concentric with an opening of the outer tub 2 described later.

  An operation panel 6 including a power switch 39, operation switches 12, 13 and a display 14 is provided at the upper center of the housing 1. The operation panel 6 is electrically connected to a control device 38 (see FIG. 2) provided at a lower portion of the housing 1.

  As shown in FIG. 2, a detergent container 19 is provided on the upper left side in the housing 1. The detergent container 19 allows a drawer-type detergent tray 7 to be mounted from a front opening. When detergents are to be put in, the detergent tray 7 is pulled out as shown by a two-dot chain line in FIG. The detergent container 19 is fixed to the upper reinforcement 36 of the housing 1. Further, a water outlet 19a is provided slightly behind the left side surface of the detergent container 19. Therefore, the bottom surface of the detergent container 19 is formed in a mortar shape such that the position of the water outlet 19a is the lowest.

  On the rear side of the detergent container 19, water supply-related components such as a water supply electromagnetic valve 16 (see FIG. 1), a bath water suction pump 17, and a water level sensor 34 are provided. A water supply unit 15 (water supply means) is provided at an upper opening of the detergent container 19. The upper cover 1e is provided with a water supply hose connection port 16a from a tap (see FIG. 1) and a water absorption hose connection port 17a for remaining hot water in the bath (see FIG. 1).

  The drum 3 is a cylindrical washing / dewatering tub rotatably supported, and has a large number of through holes (not shown) on its outer peripheral wall and bottom wall for water passage and ventilation, and a front end face on the front end surface. And an opening 3a for taking in and out clothes. A fluid balancer 3A that rotates integrally with the drum 3 is provided on the outer peripheral side of the opening 3a. The rotation center axis of the drum 3 is inclined so that it is horizontal or higher on the opening 3a side.

  The outer tub 2 has a cylindrical shape, encloses the drum 3 coaxially, has an open front surface, and has a drum motor 4 attached to the center outside the rear end surface. The rotation shaft of the drum motor 4 penetrates the outer tub 2 and is connected to the drum 3. An outer tank cover 2d that allows water to be stored in the outer tank 2 is provided in the opening on the front surface. The outer tub 2 is supported by a damper 5 whose lower side is fixed to the base 1h. A rubber bellows 10 is provided at the opening of the outer tub 2, and the outer tub 2 is water-sealed by closing the door 9.

  A water supply port 2a for supplying water and detergents into the outer tub 2 is provided at a rear portion of the side surface of the outer tub 2. The water supply port 2a and the water outlet 19a of the detergent container 19 are connected by a bellows hose 20 made of rubber.

  On the bottom inner peripheral surface of the outer tub 2, a concave recess 2 f is provided so as to extend in the axial direction of the outer tub 2. The bottom surface of the concave portion 2f is an inclined surface descending from the front side to the rear side, and a drain port 21 is provided on the rear side of the concave portion 2f. A bellows hose 22 is connected to the drain port 21 via a joint 21a. An inflow port 18 for bottom circulating water is provided on the front side of the recess 2f.

  The drain hose 26 has one end connected to a water outlet port (not shown) of the circulation pump 24 described later, and the other end extending outside the machine. The drain hose 26 is provided with a drain valve 25 in the middle of the extension in the machine.

  The washing water in the outer tub 2 is sucked into the circulation pump 24 through the recess 2f. By providing the recess 2f, the amount of water stored in the outer tank 2 is increased. Therefore, by increasing the rotation speed of the circulation pump 24, a large flow of the washing water is sucked into the circulation pump 24, and the circulation flow rate is increased. As a result, the washing efficiency of the clothes is more improved than before.

  An air trap 2e is provided at the lowermost part of the rear end surface of the outer tub 2. The lower part of the air trap 2e is provided with a communication hole 2e1 which communicates with the outer tub 2 (recess 2f), and the upper part of the air trap 2e and the water level sensor 34 are connected by a tube 35, and the water level in the outer tub 2 Is detected.

  A circulation pump 24, a filter case 23, and a drain valve 25 are provided between the outer tank 2 and the base 1h. As shown in FIG. 3, the filter case 23 has a cylindrical shape having an opening on the front side, and has a detachable filter (not shown) mounted therein to collect foreign matter and lint in the washing water. As shown in FIG. 1, the filter case 23 has a door 1g provided on the lower front cover 1f opened, and a filter (not shown) can be easily attached and detached by turning a handle 23d. The filter case 23 is inclined so that the front side is higher. The circulation system of the washing water centered on the circulation pump 24 will be described later in detail.

  As shown in FIG. 2, a drying duct 29 is arranged inside the rear surface of the housing 1. The drying duct 29 is connected to an intake port provided at the rear of the outer tub 2 by a bellows hose 29a made of rubber. A water-cooling and dehumidifying mechanism (not shown) is built in the drying duct 29.

  Incidentally, during the drying operation, warm air is blown into the drum 3 by a heater (not shown), a blower fan, or the like, and moisture evaporates from the clothes. The high-temperature and high-humidity air is sucked into the drying duct 29, cooled and dehumidified by the above-mentioned water-cooling dehumidification mechanism to become low-temperature air, and is blown into the drum 3 after being heated by a heater (not shown). Note that a heat pump may be used instead of the heater and the water-cooled dehumidifying mechanism.

  Next, a circulation system of the washing water centered on the circulation pump 24 will be described.

  As shown in FIG. 3, the circulation pump 24 includes a casing 42 formed integrally with the filter case 23, and a circulation pump motor 47. The casing 42 has discharge ports 44 and 45, a water inlet port 23a (see FIG. 2), and a water outlet port (not shown).

  As shown in FIGS. 4 (a) and 4 (b), the discharge port 44 is connected to a circulation channel 27 (see FIGS. 5 (a) and 5 (b)) provided on the inner peripheral wall of the outer tank cover 2d via a bellows hose 41. ) See)).

  The bellows hose 41 and the circulation passage 27 together with the bellows hose 22 (see FIG. 2) constitute a circulation passage from the bottom of the outer tub 2 to the upper part of the outer tub 2.

  The circulation flow path 27 is connected to a discharge section 27a (see FIG. 5A) serving as a nozzle provided inside and above the outer tank cover 2d.

  The discharge port 45 is connected to the joint 18a via a bellows hose 40 as shown in FIG. The joint 18a is provided at an inflow port 18 formed so as to face a depression 2f (see FIG. 3A) at the bottom of the outer tank 2.

  When the circulation pump motor 47 of the circulation pump 24 rotates forward with the drain valve 25 (see FIG. 2) closed, the washing water in the outer tub 2 passes through the bellows hose 22 from the drain port 21 (see FIG. 2) and passes through the filter. Foreign matter is removed by a filter (not shown) in the case 23. Thereafter, the washing water enters the circulation pump 24, is discharged from the discharge port 44, is sent into the circulation flow path 27, and is discharged from the discharge unit 27a (see FIGS. 5A and 5B) to the drum 3 (see FIG. 2). ) Is sprinkled inside.

  On the other hand, when the circulating pump motor 47 of the circulating pump 24 rotates in the reverse direction, the washing water in the outer tub 2 passes through the bellows hose 22 from the drain port 21 (see FIG. 3A) and passes through the filter (not shown) in the filter case 23. ) Removes foreign matter. Thereafter, the washing water enters the circulation pump 24, is discharged from the discharge port 45, and returns into the outer tub 2 via the bellows hose 40 and the joint 18a. When the drain valve 25 (see FIG. 2) is opened, the washing water in the outer tub 2 passes through a filter (not shown) in the filter case 23 and is drained from the drain hose 26 to the outside of the machine.

  Incidentally, the circulation pump motor 47 in the present embodiment is rotatable at a rotation speed of 2600 rpm or more in order to secure a circulation flow rate described later. This rotation speed is controlled by the control device 38 (see FIG. 2) as described later.

  As shown in FIGS. 4A and 4B, the bellows hose 41 having one end connected to the discharge port 44 of the circulation pump 24 has the other end connected to the inlet port 2g of the circulation flow path 27. The inlet port 2g is formed on the outer peripheral surface of the outer tank cover 2d as shown in FIG.

  As shown in FIG. 5 (b), the circulation flow path 27 is formed of a tubular passage formed integrally with the inner peripheral wall of the resin outer tank cover 2d. The circulation channel 27 is formed along the opening of the outer tank cover 2d, and communicates with the discharge portion 27a formed on the upper part of the outer tank cover 2d. The circulation channel 27 is covered with a channel cover 27b. The cross-sectional shape of the circulation channel 27 is not particularly limited, and may be a circle, an ellipse, a polygon, or the like. The cross-sectional area of the circulation channel 27 is desirably equivalent to a diameter of 25 mm or more in terms of a circular shape.

  According to the circulation flow path 27 of the present embodiment, since it is provided on the inner peripheral wall of the outer tank cover 2d, the outer peripheral wall of the outer tank cover 2d is broken unlike the one formed by a vinyl chloride tube or the like. There is much less fear. Also, even if it is damaged, the washing water does not leak out of the outer tub 2. In addition, since the circulation channel 27 is formed integrally with the outer tank cover 2d, the number of components can be reduced.

  The discharge unit 27a is for injecting the washing water discharged from the discharge port 44 of the circulation pump 24 (see FIG. 4A) from above the outer tub cover 2d into the drum 3 (see FIG. 2). .

  As shown in FIG. 6A, the cross-sectional shape of the discharge unit 27 is from the upstream side to the downstream side (from the upper side to the lower side in the figure) in the flow direction of the washing water, in the width direction (circumferential direction, left and right). In the direction). The discharge unit 27 includes an inclined wall 271 inclined to the left and an inclined wall 272 inclined to the right.

  The opening 27a1 of the discharge unit 27a is formed in a slit shape (arc shape) as shown in FIG. As a result, the washing water can be sprayed in a thin film shape, and can be sprayed over a wide range in the left-right direction in the drum 3. Further, since the circulating flow rate of the washing water in the circulation flow path 27 is increased as compared with the related art, even if the slit width (gap width) of the opening 27a1 is widened, the momentum of the injection does not weaken. Thus, for example, the slit width (gap width) can be set to 3 mm or more, and blocking of the opening 27a1 by lint or the like is more reliably prevented.

  7A and 7B, the discharge unit 27 includes a vertical wall 273 and a horizontal wall 274 connected to the vertical wall 273. The vertical wall 273 is formed continuously with the side wall 27c of the circulation channel 27. The vertical wall 273 is inclined so as to descend from the side wall 27c toward the opening 27a1 of the discharge portion 27a. The horizontal wall 274 is formed continuously with the lower end of the vertical wall 273. The extending end of the horizontal wall 274 is located at an interval from the lower end of the flow path cover 27b, and forms an opening 27a1 of the discharge portion 27a with the flow path cover 27b.

  As shown in FIG. 6A, a sprinkling member 50 is attached to the discharge unit 27a. The water sprinkling member 50 extends in the width direction (circumferential direction, left-right direction) from the upstream side to the downstream side (from the upper side to the lower side in the figure) in the flow direction of the washing water in accordance with the shape of the discharge portion 27a. It is shaped like a fan that gradually expands. The water sprinkling member 50 is formed in a sheet shape from an elastic material, for example, PET (polyethylene terephthalate). As will be described later, the washing water flowing through the circulation channel 27 is applied to the water sprinkling member 50, and is elastically deformable under the pressure of the washing water. In the upper end portion 51 of the water sprinkling member 50, a plurality of insertion holes 52 (three) are formed for attachment to the discharge portion 27a. In the upper end portion 51, the plurality of insertion holes 52 are formed at intervals in the circumferential direction of the outer tank cover 2d.

  As shown in FIGS. 7A and 7B, the water sprinkling member 50 is disposed over the vertical wall 273 and the horizontal wall 274 of the discharge portion 27a so that the washing water flowing through the circulation flow path 27 is applied. Have been. As shown in FIG. 6B, a plurality of pins 27e (three, see FIG. 6A) for attaching the water sprinkling member 50 are protruded from the vertical wall 273. The plurality of pins 27 e are provided corresponding to the respective insertion holes 52 of the water sprinkling member 50. The water sprinkling member 50 is attached to the discharge section 27a by inserting each pin 27e into each insertion hole 52.

  In FIG. 8A, a state in which the amount of the washing water is small is indicated by a thin white arrow, and in FIG. 8B, a state in which the amount of the washing water is large is indicated by a thick white arrow (see the following). The same applies to the embodiment).

  As shown in FIG. 6B, a boss 27d is provided on the flow path cover 27b that covers the circulation flow path 27. The boss 27d has an engagement hole 27f with which the pin 27e on the vertical wall 273 side is engaged. By the engagement between the pin 27e and the engagement hole 27f, the upper end 51 of the watering member 50 is sandwiched between the vertical wall 273 and the boss 27d. FIG. 6B schematically shows an engagement relationship between the pin 27e and the engagement hole 27f. The sprinkling member 50 may be attached using an adhesive or the like without using the engagement relationship between the pin 27e and the engagement hole 27f.

  As shown in FIGS. 7A and 7B, the lower part of the water sprinkling member 50 is in a state of floating from the corner 275 of the vertical wall 273 and the horizontal wall 274, that is, does not adhere to the corner 275, and Are arranged with a gap between them. That is, the water sprinkling member 50 is disposed with a space (gap) that can be elastically deformed toward the corner 275 side.

  The tip portion 55 of the water sprinkling member 50 is located at the opening 27a1 of the discharge portion 27a. The tip portion 55 is not fixed to the lateral wall 274 and is a free end. When the water sprinkling member 50 is elastically deformed as described later, the distal end portion 55 is movable so as to be slightly retracted inward of the opening 27a1 following the elastic deformation.

  Washing water flowing from the circulation channel 27 toward the discharge portion 27a is applied to such a watering member 50. At this time, the sprinkling member 50 is elastically deformed by receiving the pressure of the washing water flowing to the discharge portion 27a. When the amount of the washing water is small, that is, when the rotation speed of the circulation pump 24 is low and the pressure of the washing water flowing is small (when the circulation pump 24 is at a low rotation speed), the water sprinkling member 50 shown in FIG. As shown in (a), the elasticity of the water sprinkling member 50 is superior, and the side cross-sectional shape is maintained in a substantially straight state.

  In this case, the side cross-sectional shape of the water sprinkling member 50 is inclined downward from the upstream side in the flow direction of the washing water toward the opening 27a1 located downstream. Thereby, the discharge direction of the wash water discharged from the opening 27a1 via the water sprinkling member 50 is the downward direction L1. In the downward direction L1, as shown in FIG. 9, the discharged washing water is sprayed toward the vicinity of the front edge of the lower end of the drum 3 (near the fluid balancer 3A).

  On the other hand, when the amount of the washing water is large, that is, when the rotation speed of the circulation pump 24 is high, the pressure of the washing water hitting the water sprinkling member 50 increases the elasticity of the water sprinkling member 50 as compared with when the rotation speed of the circulation pump 24 is low. The water sprinkling member 50 is elastically deformed. In this case, as shown in FIG. 8B, the water sprinkling member 50 has a side cross-sectional shape that is concavely curved toward the corner 275. The side surface (the surface facing the opening 27a1) of the water sprinkling member 50 is concave in a round shape, and the inclination angle of the tip end of the water sprinkling member 50 follows the concave shape, compared to when the rotation speed of the circulation pump 24 is low. Become gentle. Thus, the discharge direction of the wash water discharged from the opening 27a1 via the water sprinkling member 50 is the upward direction L2 as shown in FIG. 8B. In the upward direction L2, as shown in FIG. 9, the discharged washing water is sprinkled toward substantially the center of the back side of the drum 3.

  As described above, the form of the water spray member 50 can be changed in accordance with the amount of water flowing through the circulation flow path 27, and the direction in which water is sprayed into the drum 3 can be changed in the vertical direction in accordance with the change in the form. It is. The sprinkling member 50 discharges the washing water in the downward direction L1 when the amount of the washing water is small and discharges the washing water in the downward direction L1. May be configured to discharge the washing water in the direction L2.

  The outer tank cover 2d may be formed with a small hole communicating with the circulation channel 27 so as to be adjacent to the discharge portion 27a. When the washing water is jetted from the opening 27a1 of the discharge portion 27a through the circulation channel 27, the washing water is jetted from the small holes toward the back side of the bellows 10. When the washing water sprayed from the small holes flows from the upper side to the lower side on the back side of the bellows 10, it is possible to wash away lint and the like attached to the back side of the bellows 10.

  FIG. 10 is a control block diagram of the drum type washer / dryer.

  As shown in FIG. 10, the control device 38 includes a microcomputer 38a, a drive circuit 64, and the like, and outputs signals from on / off signals of the operation switches 12, 13 shown in FIG. 1 and various sensors (the water level sensor 34 and the temperature sensor 62). An output signal input circuit and the like are also provided. In addition, the control device 38 acquires various information signals in a user's operation, a washing process (washing process, a rinsing process, a dehydrating process), and a drying process via the microcomputer 38a. In the control device 38, the microcomputer 38a controls the drum motor 4, the water supply electromagnetic valve 16, the drain valve 25, and the circulation pump 24 via the drive circuit 64. Also, the display 14 (see FIG. 1), the light emitting element 66, and the buzzer 67 are controlled in order to inform the user of the information on the drum type washer / dryer.

  The detergent water supply solenoid valve 16b supplies tap water from the water supply hose connection port 16a (see FIG. 1) to a detergent introduction chamber (not shown) of the detergent tray 7 (see FIG. 1) through a water supply path (not shown). I do. The tap water supplied to the detergent introduction chamber is poured into the outer tank 2 (see FIG. 2) together with the introduced detergent via the detergent container 19 (see FIG. 2) and the bellows hose 20 (see FIG. 2). You.

  The finishing agent water supply solenoid valve 16c supplies tap water from the water supply hose connection port 16a to a finishing agent charging chamber (not shown) of the detergent tray 7 (see FIG. 1) through a water supply path (not shown). The tap water injected into the finishing agent charging chamber is injected into the outer tub 2 via the bellows hose 20 together with the finishing agent (softener) charged.

  The outer tank water supply solenoid valve 16d supplies tap water from the water supply hose connection port 16a to the outer tank 2 from the bellows hose 20 through a water supply path (not shown).

  The cooling water supply electromagnetic valve 16e supplies tap water from the water supply hose connection port 16a to a water cooling and dehumidifying mechanism (not shown) of the drying duct 29 (see FIG. 2) through a water supply path (not shown).

  The bath water drawn from the water suction hose connection port 17a (see FIG. 1) by the bath water suction pump 17 (see FIG. 2) is supplied from the bellows hose 20 into the outer tub 2 through a water supply path (not shown). Is done.

≪Operation process≫
Next, an operation process of the drum type washing and drying machine will be described with reference to FIG. FIG. 11 is a process diagram illustrating an operation process of a washing operation (washing to rinsing to dehydration) in the drum type washing and drying machine according to the first embodiment. In the following, the detergent water supply electromagnetic valve 16b is a first electromagnetic valve, the finish agent water supply electromagnetic valve 16c is a second electromagnetic valve, the outer tank water supply electromagnetic valve 16d is a third electromagnetic valve, and the cooling water supply electromagnetic valve 16e is a fourth electromagnetic valve. Explanation will be given as a valve.

  As shown in FIG. 11, in step S1, the control device 38 receives an input of a course selection in an operation process of the drum type washer / dryer (course selection). Here, the user opens the door 9, puts clothes to be washed into the inside of the drum 3, and closes the door 9. Then, the user operates and operates the operation switches 12 and 13 to select and input a course of the driving process. By operating the operation switches 12 and 13, the course of the selected operation process is input to the control device 38. The control device 38 reads the corresponding operation pattern from the operation pattern database based on the input course of the operation process, and proceeds to step S2. In the following description, it is assumed that the standard course (washing to rinsing twice to dehydration) is selected.

  In step S2, the control device 38 executes a process of detecting the weight (cloth amount) of the clothes put into the drum 3 (cloth amount sensing). Specifically, the control device 38 drives the drum motor 4 in the forward direction at a predetermined rotation speed (for example, 180 rpm) to rotate the drum 3 and calculates the weight (cloth amount) of the clothing before water injection. .

  In step S3, the control device 38 executes a step of calculating the detergent amount and the operation time. Specifically, the control device 38 controls the water supply electromagnetic valve 16 (for example, opens the third electromagnetic valve) to supply water directly to the water supply port 2 a of the outer tub 2. Although not shown, the control device 38 detects the electrical conductivity (hardness) of the supplied water via an electrical conductivity sensor (not shown) arranged at the inner bottom of the outer tub 2. The temperature of the supplied water is detected by the temperature sensor 62 (see FIG. 10). Then, the water supply electromagnetic valve 16 is controlled (for example, the third electromagnetic valve is closed), and the water supply to the outer tub 2 is terminated.

  The control device 38 determines the amount of detergent to be introduced and the operation time by searching a map based on the cloth amount, the electric conductivity (hardness) of water, and the temperature of water detected in step S2. Then, the control device 38 displays the determined detergent amount and operation time on the display device 14. In addition, although it was demonstrated that water is supplied to the outer tub 2 and the electric conductivity (hardness) and water temperature of water are detected, the invention is not limited to this. For example, the electric conductivity (hardness) and the water temperature of the water at the time of the previous operation may be stored in a storage unit (not shown) of the microcomputer 38a and used.

  In step S4, the control device 38 executes a detergent input wait step. For example, the control device 38 waits for a predetermined time and proceeds to step S5. The user puts detergents into the detergent tray 7 with reference to the detergent amount displayed on the display 14 during standby. When the detergent tray 7 is opened and then closed by means for detecting opening and closing of the detergent tray 7 (not shown), the control device 38 determines that detergents have been introduced and proceeds to step S5. It may be.

  In step S5, the control device 38 executes a detergent melting step. For example, the control device 38 controls the water supply electromagnetic valve 16 (for example, opens the first electromagnetic valve) to supply water to the detergent input chamber via the water supply pipe. Detergent and water in the detergent charging chamber are supplied from the outlet via a detergent delivery pipe, a bellows hose 20, a water supply port 2a at the upper rear side of the outer tub 2, and a water supply path formed on the inner surface of the bottom wall of the outer tub 2. It flows into the recess 2f of the outer tank 2. When the water is supplied to the predetermined water amount, the control device 38 controls the water supply electromagnetic valve 16 (for example, closes the first electromagnetic valve) to stop the water supply. Then, the control device 38 executes the detergent melting operation.

  Specifically, the control device 38 controls the circulation pump 24 so that the water and the detergent sucked in from the drain port 21 through the bellows hose 22 flow into the recess 2f through the bellows hose 40 (see FIG. 3). Discharge from the inlet 18. The water and the detergent discharged from the inflow port 18 flow through the recessed portion 2f, head toward the drain port 21, and circulate. Thereby, the water and the detergent are stirred, and the detergent is dissolved in the water. After a lapse of a predetermined time (for example, 10 seconds), the control device 38 stops the circulation pump 24 and proceeds to step S6.

  In step S6, the control device 38 executes the rotary water supply process 1. Specifically, the control device 38 controls the water supply electromagnetic valve 16 (for example, opens the first electromagnetic valve and the third electromagnetic valve) to raise the water level of the wash water in the outer tub 2. Then, the drum motor 4 is controlled to rotate the drum 3 at a predetermined rotation speed (for example, 35 rpm [r / min]) in the forward and reverse directions, and the clothes are replaced. Further, the control device 38 controls the circulation pump 24 (circulation pump motor 47) so as to have a predetermined rotation speed, and provides washing water having a high detergent concentration drawn from the drain port 21 to the opening of the outer tub 2. By discharging into the inside of the drum 3 from the opening 27a1 of the discharged portion 27a, the clothes inside the drum 3 are permeated.

  In this case, the control device 38 controls the rotation speed of the circulation pump 24 alternately between a low rotation speed and a high rotation speed. When the rotation speed of the circulation pump 24 is controlled to a low rotation speed (for example, 1800 rpm), the amount of washing water flowing through the circulation flow path 27 decreases, and the pressure of the washing water impinging on the water spray member 50 also decreases. As a result, as shown in FIG. 8A, the elasticity of the sprinkling member 50 is superior, and the discharge direction of the washing water discharged from the opening 27a1 via the sprinkling member 50 is the downward direction L1.

  On the other hand, when the rotation speed of the circulation pump 24 is controlled to a high rotation speed (for example, 3000 rpm), the amount of the washing water flowing through the circulation flow path 27 increases, and the pressure of the washing water impinging on the water sprinkling member 50 increases. The state becomes higher than the elasticity. Then, as shown in FIG. 8B, the sprinkling member 50 is elastically deformed, and the discharge direction of the washing water becomes the upward direction L2.

  In the rotation water supply step 1, as described above, the rotation speed of the circulation pump 24 is alternately controlled by the control device 38 between the low rotation speed and the high rotation speed. Therefore, in the rotary water supply step, as shown in FIG. 9, the wash water discharged from the opening 27a1 is sequentially discharged with an angle difference between the downward direction L1 and the upward direction L2. That is, the wash water is sequentially sprinkled with an angle θ difference in two directions, the downward direction L1 and the upward direction L2. As a result, the washing water can uniformly penetrate the clothes inside the drum 3. The control of the control device 38 may be such that the rotation speed of the circulation pump 24 is alternately controlled at a predetermined interval between a low rotation speed and a high rotation speed, or the time during which the rotation speed is held at either one of the rotation speeds may be controlled. It may be controlled to be longer than the other.

  Then, when the water level of the washing water in the outer tub 2 rises to a predetermined water level (medium water level), the water supply is stopped (for example, the first solenoid valve and the third solenoid valve are closed). When a predetermined time has elapsed since the start of the rotary water supply step, the rotary water supply step ends, and the process proceeds to step S7.

  In step S7, the control device 38 executes a pre-washing and stirring process. The pre-washing / stirring step is a step in which washing water having a high detergent concentration generated in the detergent dissolving step is soaked into clothing. By soaking the washing water with a high detergent concentration into the clothes, the detergency is improved.

  Specifically, the control device 38 alternately controls the rotation speed of the circulating pump 24 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 3000 rpm), and to control the rotation speed from the drain port 21 (see FIG. 2). The sucked washing water is discharged into the inside of the drum 3 from the opening 27a1 (see FIG. 6A) of the discharge portion 27a of the outer tub 2. Also in this case, since the rotation speed of the circulation pump 24 is alternately controlled between the low rotation speed and the high rotation speed, the discharge direction of the wash water is discharged with an angle θ difference between the downward direction L1 and the upward direction L2. Is done. As a result, the washing water having a high detergent concentration can uniformly penetrate the clothes inside the drum 3.

  In addition, the control device 38 controls the drum motor 4 to rotate the drum 3 in a forward / reverse direction at a predetermined rotation speed (for example, 35 rpm) so that the clothes fall from a position lower than the uppermost point of the drum 3. I have to. That is, in the pre-washing and stirring step, the mechanical force generated when the clothes fall from above the drum 3 is reduced by lowering the height at which the clothes fall from above. After a lapse of a predetermined time (for example, 5 minutes), the control device 38 ends the pre-washing and stirring process, and proceeds to step S8.

  In step S8, the control device 38 executes the rotary water supply process 2. Specifically, the control device 38 controls the water supply electromagnetic valve 16 (for example, opens the first electromagnetic valve and the third electromagnetic valve) to raise the water level of the wash water in the outer tub 2. Then, the drum motor 4 is controlled to rotate the drum 3 at a predetermined rotation speed (for example, 35 rpm [r / min]) in the forward and reverse directions, and the clothes are replaced. Further, the control device 38 controls the circulation pump 24 (circulation pump motor 47) so as to have a predetermined rotation speed, and provides washing water having a high detergent concentration drawn from the drain port 21 to the opening of the outer tub 2. By discharging into the inside of the drum 3 from the opening 27a1 of the discharged portion 27a, the clothes inside the drum 3 are permeated.

  In the rotation water supply process 2, as described above, the rotation speed of the circulation pump 24 is alternately controlled by the control device 38 between the low rotation speed and the high rotation speed.

  Then, when the water level of the washing water in the outer tub 2 rises to a predetermined water level (high water level), the water supply is stopped (for example, the first solenoid valve and the third solenoid valve are closed). When a predetermined time has elapsed since the start of the rotary water supply step, the rotary water supply step ends, and the process proceeds to step S9.

  In step S9, the control device 38 executes a main washing and stirring process. In the main washing / stirring step, for example, a soft knocking washing step and a fir washing step are executed. The soft-smashing process is to lift clothes collected in the lower part of the drum 3 by the rotation of the drum 3 and to cause the clothes to fall from above the inside of the drum 3 by gravity being superior to centrifugal force on the clothes. This is the process of applying mechanical force to clothing. At this time, the clothes are dropped from a position lower than the uppermost point of the drum 3. That is, by reducing the height at which the garment falls from above, the mechanical force generated when the garment falls from above the drum 3 is reduced.

  Specifically, the control device 38 alternately controls the rotation speed of the circulating pump 24 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 3000 rpm), and to control the rotation speed from the drain port 21 (see FIG. 2). The sucked washing water is discharged into the inside of the drum 3 from the opening 27a1 (see FIG. 6A) of the discharge portion 27a of the outer tub 2. Also in this case, since the rotation speed of the circulation pump 24 is alternately controlled between the low rotation speed and the high rotation speed, the discharge direction of the wash water is discharged with an angle θ difference between the downward direction L1 and the upward direction L2. Is done. Thus, the washing water permeates the clothes inside the drum 3 evenly.

  The control device 38 controls the drum motor 4 to rotate the drum 3 at a predetermined rotation speed (for example, 35 rpm) in the forward and reverse directions, thereby soft-tapping the clothes inside the drum 3. After a lapse of a predetermined time (for example, 2 minutes), the control device 38 ends the knock-washing process and proceeds to the rice-washing process.

  The rubbing step is a mechanical process that is less than the mashing of the clothes while rolling the clothes collected in the lower portion of the drum 3 by the rotation of the drum 3 on the inner peripheral wall surface 3b of the drum 3 (without dropping the clothes). This is the process of giving power. In other words, in the fir-washing process, the clothes are operated while rolling around the lower part in the drum 3.

  Specifically, the control device 38 alternately controls the rotation speed of the circulating pump 24 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 3000 rpm), and to control the rotation speed from the drain port 21 (see FIG. 2). The sucked washing water is discharged into the inside of the drum 3 from the opening 27a1 (see FIG. 6A) of the discharge portion 27a of the outer tub 2. Also in this case, since the rotation speed of the circulation pump 24 is alternately controlled between the low rotation speed and the high rotation speed, the discharge direction of the wash water is discharged with an angle θ difference between the downward direction L1 and the upward direction L2. Is done. Thus, the washing water permeates the clothes inside the drum 3 evenly. In addition, the control device 38 controls the drum motor 4 to rotate the drum 3 in a forward / reverse direction at a predetermined rotation speed (for example, 30 rpm) (for example, the drum 3 is rotated left and right at a rotation angle of 20 to 60 °). By doing so, the clothes inside the drum 3 are also washed. When a predetermined time (for example, one minute) elapses, the control device 38 ends the fir-washing step and performs the soft-tapping step again.

  After a lapse of a predetermined time (for example, 10 minutes) in Step 9, the control device ends the soft smashing process or the rice washing process, and proceeds to the first rinsing process (Steps S10 to S13).

  In step S10, the control device 38 executes a drainage process. The control device 38 stops the drum motor 4 and the circulation pump 24, opens the drain valve 25, and drains the washing water in the outer tub 2. The water level sensor 34 keeps monitoring the water level of the washing water in the outer tub 2 during drainage. When the detection value of the water level sensor 34 falls below the predetermined water level, the control device 38 ends the drainage process and proceeds to step S11.

  In step S11, the control device 38 executes one dehydration process. The control device 38 rotates the drum 3 in a reverse direction at a high speed (for example, 700 rpm) in a state where the drain valve 25 is kept open to dewater the washing water contained in the clothes. When the predetermined time has elapsed, the control device 38 ends the dehydration 1 process, and proceeds to step 12.

  In step S12, the control device 38 executes a rotating shower 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 rotating the drum 3 in the opposite direction at a medium speed (for example, 100 rpm). Sprinkle water on clothing. The control time of the water supply electromagnetic valve 16 (third electromagnetic valve) at this time is determined based on the cloth amount detected in step S2. When a predetermined time has elapsed, the water supply is stopped (for example, the third solenoid valve is closed).

  Further, the control device 38 alternately controls the rotation speed of the circulation pump 24 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 3000 rpm), and sucks the water from the drain port 21 (see FIG. 2). The rinsing water is discharged into the inside of the drum 3 from the opening 27a1 (see FIG. 6A) of the discharge portion 27a of the outer tank 2. Since the rotation speed of the circulation pump 24 is alternately controlled between the low rotation speed and the high rotation speed, the discharge direction of the rinse water is discharged with an angle θ difference between the downward direction L1 and the upward direction L2. Thereby, the rinsing water is efficiently sprinkled on the clothes inside the drum 3. After a lapse of a predetermined time, the circulation pump 24 is stopped, the drain valve 25 is opened, and the rinse water in the outer tub 2 is drained.

  In step S13, the control device 38 executes two dehydration processes. The control device 38 rotates the drum 3 in a reverse direction at a high speed (for example, 700 rpm) in a state where the drain valve 25 is kept open to dewater the washing water contained in the clothes. When the predetermined time has elapsed, the control device 38 ends the dehydration two process and proceeds to the rinsing two process (Step S14 to Step S16).

  In step S14, the control device 38 executes a water supply step. The control device 38 closes the drain valve 25, controls the water supply electromagnetic valve 16 (for example, opens the first electromagnetic valve), and supplies rinsing water into the outer tank 2. When the water level rises to a predetermined level, the water supply is stopped (for example, the first solenoid valve is closed), the control device 38 ends the water supply process, and proceeds to step S15.

  In step S15, the control device 38 executes a finishing agent (softener) water supply step. The control device 38 controls the water supply electromagnetic valve 16 (for example, by opening the second electromagnetic valve) to supply the outer tank 2 with the rinsing water containing the soft finish, and in Step S14, the outer tank 2 The rinse water supplied therein is mixed with the rinse water containing the softening agent.

  In step S16, the control device 38 executes a rotary water supply / supplementation water process. The control device 38 controls the water supply electromagnetic valve 16 (for example, opens the first electromagnetic valve and the third electromagnetic valve) to supply water to the outer tank 2. When the water is supplied to the predetermined 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 4 while supplying water to rotate the drum 3 in the forward and reverse directions (for example, 35 rpm).

  Further, the control device 38 alternately controls the rotation speed of the circulation pump 24 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 3000 rpm), and sucks the water from the drain port 21 (see FIG. 2). The rinsing water is discharged into the inside of the drum 3 from the opening 27a1 (see FIG. 6A) of the discharge portion 27a of the outer tank 2. In this case, since the rotation speed of the circulation pump 24 is alternately controlled between the low rotation speed and the high rotation speed, the discharge direction of the rinsing water containing the soft finishing agent is angled between the downward direction L1 and the upward direction L2. Discharged with θ difference. Thereby, the softening agent permeates the clothes inside the drum 3 evenly.

  In step S17, the control device 38 executes a rinsing and stirring process. In the rinsing and stirring process, as in the case of the soft knocking, the clothes accumulated in the lower part of the drum 3 are lifted by the rotation of the drum 3 and the gravitational force exceeds the centrifugal force on the clothes. This is the process of dropping from At this time, the clothes are dropped from a position lower than the uppermost point of the drum 3. That is, by reducing the height at which the garment falls from above, the mechanical force generated when the garment falls from above the drum 3 is reduced.

  Specifically, the control device 38 controls the drum motor 4 to rotate the drum 3 (for example, 40 rpm). Then, the control device 38 alternately controls the rotation speed of the circulation pump 24 to a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 3000 rpm), and sucks the water from the drain port 21 (see FIG. 2). The rinsing water is discharged from the opening 27a1 of the discharge portion 27a of the outer tub 2 (see FIG. 6A) into the inside of the drum 3 to rinse clothes. Also in this case, the washing water is discharged with an angle θ difference between the downward direction L1 and the upward direction L2, so that rinsing of clothes is promoted. Then, when the predetermined time has elapsed, the control device 38 ends the rinsing-stirring process, and proceeds to the dehydration process (steps S18, S19).

  In step S18, the control device 38 executes a drainage process. The controller 38 stops the drum motor 4 and the circulation pump 24, opens the drain valve 25, and drains the rinse water in the outer tub 2. The water level sensor 34 keeps monitoring the water level of the washing water in the outer tub 2 during drainage. When the detection value of the water level sensor 34 falls below the predetermined water level, the control device 38 ends the drainage process and proceeds to step S19.

  In step S19, the control device 38 executes a dehydration step. Specifically, the control device 38 opens the drain valve 25, controls the drum motor 4 to rotate the drum 3 at a high speed (for example, 600 rpm), and centrifugally dehydrates the clothes. Then, when a predetermined time has elapsed, the control device 38 stops the drum motor 4, closes the drain valve 25, and ends the washing course (washing-rinsing-dehydration).

  As described above, according to the operation process of the drum type washing machine according to the present embodiment, high washing performance can be ensured by the soft knock-washing process and the rice-washing process while suppressing damage to clothes.

  In the soft knocking step, the rotation speed of the drum 3 is set to a low speed (for example, 35 rpm) so that the clothes fall from a position lower than the uppermost point of the drum 3. That is, by reducing the height at which the garment falls from above, the mechanical force generated when the garment falls from above the drum 3 is reduced. As a result, the damage to the clothes caused by the drop impact can be reduced.

  In the rubbing step, the clothes collected below the inside of the drum 3 due to the rotation of the drum 3 are rolled on the inner peripheral wall surface 3b of the drum 3 (without dropping the clothes), and are mechanically weaker than soft-washing. Empower. That is, by reducing the height at which the garment falls from above, the mechanical force generated when the garment falls from above the drum 3 is reduced. As a result, the damage to the clothes caused by the drop impact can be reduced.

  Further, the rotation speed of the drum 3 is set to a low speed (for example, 30 rpm), and the drum 3 is rotated in the forward and reverse directions (for example, the drum 3 is rotated left and right at a rotation angle of 20 to 60 °). In other words, the drum rotates once or less in the same direction, and it is possible to prevent the clothes from being entangled with each other and to pull each other, and to reduce the damage to the clothes caused by the expansion and contraction of the clothes.

  In addition, in order to wet the clothes, it is necessary to pass through a water film formed by washing water and rinsing water sprayed from the opening side of the outer tub 2, but the larger the water film area, the more clothes can be contacted. Therefore, the clothes can be efficiently wet. In order to increase the area of the water film, it is preferable to wash and rinse water diagonally from the opening side of the outer tub 2 toward the bottom surface of the drum 3 or the inner peripheral surface of the cylinder. The discharge port of the rinse water is desirably at the upper portion on the opening side of the outer tub 2. Therefore, in order to make the clothes contain washing water or rinsing water, the clothes must be lifted at least to a position higher than the water film, and the mechanical force received by the clothes when dropped becomes large, and the clothes are damaged. Further, in order to keep the clothes moist, it is necessary to continuously perform a tumbling operation, and the clothes are damaged. However, according to the present embodiment, the rotation speed of the circulation pump 24 is alternately controlled between a low rotation speed (for example, 1800 rpm) and a high rotation speed (for example, 3000 rpm), and the rotation speed of the circulation pump 24 is changed from the drain port 21 (see FIG. 2). The sucked washing water and rinsing water are sprayed over a wide area inside the drum 3 from the opening 27a1 (see FIG. 6A) of the discharge portion 27a of the outer tub 2. In other words, the clothes can be washed and rinsed uniformly without increasing the circulation flow rate of the wash and rinse water.

  As a result, even in a process where the clothes fall from above, such as a soft knock-washing process or a rice-washing process, the washing water and the rinsing water can be evenly included in the clothes, while suppressing the damage of the clothes. High cleaning performance can be ensured.

  By the way, in the fir washing process, the reversal of reversal is repeated while the rotation of the drum 3 is one rotation or less. When the rotation of the drum 3 is started, the current flowing through the drum motor 4 increases, so that the temperature of the drum motor 4 tends to increase in the rice washing process. In this embodiment, the soft knocking step and the paddy washing step are alternately and repeatedly performed. The temperature of the drum motor 4 raised in the fir-washing process is suppressed from increasing in the soft-battering process. As a result, an excessive rise in the temperature of the drum motor 4 can be suppressed.

  In step S6, the control device 38 sets the washing water level to a predetermined water level (medium water level), and in step S7, executes a pre-washing and stirring process. After that, in step S8, the control device 38 sets the washing water level to a predetermined water level (high water level) and performs additional water supply. In step S9, the main washing and stirring step is performed. That is, the pre-washing and stirring step has a smaller amount of water and a relatively higher detergent concentration than the main washing and stirring step. Thereby, high washing power can be obtained in the pre-washing and stirring step, and in the main washing and stirring step, the clothes lifted upward by the drum 3 fall on the raised water surface, so that the drop impact is suppressed and the clothes are damaged. Can be suppressed.

  As described above, according to the operation process of the drum type washing machine S according to the present embodiment, it is possible to secure high cleaning performance while suppressing damage to clothing that alternately repeatedly executes the soft knocking process and the paddy washing process. .

  In addition, by spraying water over a wide area inside the drum 3, even in a process in which the clothes fall from above, such as a soft knocking process and a paddy washing process, the washing water and the rinsing water are uniformly contained in the clothes. It is possible to secure high washing performance while suppressing damage to clothes.

  Here, the high washing performance can be ensured, for example, in the main washing and stirring step, since the clothes fall in a state where sufficient washing water has penetrated the entire clothes lifted by the rotation of the drum 3, This is because the washing water contained in the clothes is pushed out of the clothes together with the dirt due to the impact of the fall (slap washing). Further, since the washing water permeates the entire garment, the detergent components can be efficiently diluted even in rinsing, and the rinsing performance can be improved.

  Since the water sprinkling member 50 is formed of PET, it is inexpensive, and can be easily attached to the discharge portion 27a. Therefore, the productivity of the drum type washer / dryer is excellent.

  Since the water sprinkling member 50 is formed of PET, the surface thereof can be a smooth surface with little unevenness. Therefore, the water sprinkling member 50 is excellent in rectification of washing water and rinsing water (washing water). Thereby, the washing water and the rinsing water can be suitably sprinkled into the drum 3. This contributes to ensuring high cleaning performance.

(2nd Embodiment)
A drum type washing and drying machine according to a second embodiment will be described with reference to FIG. This embodiment is different from the first embodiment in that a guide projection 28 is provided in the circulation channel 27.

  As shown in FIG. 12A, the guide projection 28 is provided on the inner surface of the flow path cover 27b. The guide projection 28 is formed in a substantially triangular cross section, and includes an inclined surface 28 a that descends from the upstream side toward the upper surface of the water sprinkling member 50. The guide projections 28 serve to guide (guide) the washing water and the rinsing water flowing through the circulation flow path 27 to the water sprinkling member 50 through the inclined surface 28a as shown in FIGS. 12 (a) and 12 (b). The guide projection 28 may be formed integrally with the flow path cover 27b, or may be formed separately and fixed to the flow path cover 27b.

  As shown in FIG. 12A, when the amount of washing water is small, that is, when the rotation speed of the circulation pump 24 is low and the pressure of the flowing washing water is small (the circulation pump 24 is low). At the time of the rotation speed), the elasticity of the water sprinkling member 50 is superior, and the side cross-sectional shape is maintained in a substantially straight state. In this case, the washing water is suitably guided to the water spray member 50 through the inclined surface 28a of the guide projection 28.

  Next, as shown in FIG. 12B, when the amount of the washing water is large, that is, when the rotation speed of the circulation pump 24 is high, it hits the water sprinkling member 50 as compared with when the rotation speed of the circulation pump 24 is low. The pressure of the washing water exceeds the elasticity of the water sprinkling member 50, and the water sprinkling member 50 is elastically deformed. The water sprinkling member 50 has a side cross-sectional shape that is concavely curved toward the corner 275. In this case, the washing water is suitably guided to the sprinkling member 50 through the inclined surface 28a of the guide projection 28, so that the sprinkling member 50 is elastically deformed with good response according to the amount of the washing water.

  In the drum type washer-dryer of the present embodiment, since the washing water is guided to the sprinkling member 50 through the guide projection 28, the advantage that the sprinkling member 50 is easily elastically deformed is obtained. Thereby, the washing water can be discharged in the downward direction L1 and the upward direction L2 with good response according to the amount of the washing water.

  Further, since the water sprinkling member 50 is easily elastically deformed by the guide projection 28, the amount of water of the circulation pump 24 can be suppressed as compared with that of the first embodiment. Therefore, the size and cost of the circulation pump 24 can be reduced.

(Third embodiment)
A drum type washing and drying machine according to a third embodiment will be described with reference to FIG. This embodiment is different from the first and second embodiments in that an elastic watering member 50A is provided so as to protrude into the drum 3 through the opening 27a1.

  As shown in FIG. 13A, the water sprinkling member 50A has a substantially L-shaped cross section. The water sprinkling member 50A includes an upper portion 56 disposed in the discharge portion 27a (inside the opening 27a1), and a lower portion 57 that is continuous with the upper portion 56 and protrudes outside the opening 27a1 (in the drum 3). The upper part 56 and the lower part 57 are bent at an obtuse angle.

  As shown in FIG. 13B, when the amount of washing water is small, that is, when the rotation speed of the circulation pump 24 is low and the pressure of the flowing washing water is small (the circulation pump 24 is low). At the time of the rotation speed), the elasticity of the water sprinkling member 50 is superior, and the side sectional shape is maintained at the initial obtuse angle. Thus, the washing water guided to the water sprinkling member 50A and discharged into the drum 3 is in the upward direction L2.

  On the other hand, as shown in FIG. 13 (c), when the amount of the washing water is large, that is, when the rotation speed of the circulation pump 24 is high, the washing water hitting the water sprinkling member 50A is smaller than when the rotation speed of the circulation pump 24 is low. The water pressure exceeds the elasticity of the watering member 50A, and the watering member 50A is elastically deformed. Thereby, the obtuse angle between the upper portion 56 and the lower portion 57 is widened, and the washing water guided to the sprinkling member 50A and discharged into the drum 3 is in the downward direction L1.

  That is, the water sprinkling member 50A of the present embodiment is elastically deformable in accordance with the amount of washing water, and has a form in which the direction of water sprinkling is upward when the amount of washing water is small, and when the amount of washing water is large. The water is elastically deformed so that the direction of water spray is downward. That is, when the amount of water is large and small, the relationship with the elastic deformation is opposite to that of the first embodiment.

  The configuration of the drum-type washing and drying machine of the present embodiment is more simplified than those of the first and second embodiments. Further, since the lower portion 57 projects into the drum 3, the discharge direction (discharge angle) can be easily adjusted.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention. For example, in the above-described embodiment, the description has been made using the drum type washing and drying machine. However, the same applies to a drum type washing machine without a drying function. The present invention is also applicable to a vertical washing machine having a circulation pump.

  Further, as shown in FIG. 14A, a substantially rectangular water sprinkling member 50B may be attached to the substantially fan-shaped discharge part 27a. In this case, the discharge direction of the wash water discharged from the area where the water sprinkling member 50B is arranged can be changed in the vertical direction according to the amount of the wash water. Further, since there are provided a region where the discharge direction of the wash water can be changed and a region where the discharge direction is not changed, the discharge direction of the wash water can be changed. In addition, by changing the arrangement of the water sprinkling member 50 </ b> B, a variation can be given to the discharge direction.

  Further, as shown in FIG. 14B, the discharge section 27a may be formed in a substantially square shape, and the substantially square water sprinkling member 50B may be disposed.

  As described above, the shape of the discharge unit 27a and the shape of the water sprinkling member 50B can be various shapes.

  Further, as shown in FIG. 15, in the substantially fan-shaped discharge section 27a, the watering member 50C may be configured by three divided watering members 50C1, 50C2, and 50C3. In this case, the same operation and effect as those described in the first embodiment can be obtained.

  In this case, the elasticity of each of the three watering members 50C1, 50C2, and 50C3 may be varied by varying the sheet thickness and material. By making the elasticity different, the discharge direction of the washing water can be made different in the circumferential direction.

  Further, as shown in FIG. 16, a hard flap (sprinkling member) 50D is provided on the vertical wall 273 of the discharge portion 27a via a hinge 58a so as to be able to swing up and down, and the flap 50D is supported by the sprinkling member 58. Good. As the watering member 58, a member made of synthetic rubber can be used.

  In this case, the water spraying member 58 can change its swinging position in accordance with the amount of the washing water, and when the amount of the washing water is small, the watering direction becomes the upward direction (non-swinging position, initial position). is there. Further, when the amount of the washing water is large, the sprinkling member 58 receives the pressure of the washing water, and swings downward around the hinge 58a against the elasticity of the sprinkling member 58. As a result, the watering direction is downward.

  Further, the water sprinkling members 50, 50A to 50C may be made of synthetic rubber.

  Further, the watering member 50 is not always necessary, and the watering direction may be swung without the watering member 50.

2 Outer tub 3 Drum 4 Drum motor 15 Water supply unit (water supply means)
24 Circulating pump 27 Circulating flow path 28 Guide projection 50 Sprinkling members 50A to 50D Sprinkling member 273 Vertical wall 274 Horizontal wall 275 Corner

Claims (2)

An outer tank that stores water inside,
A drum rotatably supported in the outer tub and containing clothes;
A drum motor that rotationally drives the drum,
Water supply means for supplying water into the outer tank,
A circulation pump for supplying water sucked from the outer tank to a circulation passage leading to the inside of the drum,
A control device that controls the drum motor and the circulation pump, and is capable of executing a washing operation;
With
The control device includes:
Performing a first washing step, which is a pre-washing and stirring step, and a second washing step, which is a main washing and stirring step,
In the second washing step, a fir-washing operation in which clothing moves so as to roll in the drum, and a soft knocking operation in which clothing is dropped from a position lower than the uppermost portion in the drum to perform a tumbling operation are performed. ,
Only the fir-washing operation and the soft-smashing operation are performed alternately for a certain period of time,
The amount of water in the first washing step is smaller than that in the second washing step. The washing machine according to claim 1, wherein
A washing machine characterized in that the control device varies the number of revolutions of the circulating pump within a predetermined range so that a shower discharged by a pump motor of the circulating pump moves and sprays the clothes.

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