JP2018038629A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine that secures detergency while suppressing damage to clothing.SOLUTION: The washing machine comprises: an outer tub for storing water inside; a drum which is supported inside the outer tub in a rotatable manner and in which clothing is accommodated; a drum motor for rotationally driving the drum; water supply means for supplying water into the outer tub; a circulation pump for supplying water sucked from the outer tub to a circulation flow passage communicated with the inside of the drum; and a controller which controls the drum motor and the circulation pump and is capable of carrying out a washing operation. The controller carries out a washing-by-rubbing operation in which clothing moves in a rolling manner inside the drum and a washing-by-softly beating operation in which a tumbling operation is carried out by dropping off clothing from a position that is lower than the uppermost position inside the drum, and performs the washing-by-rubbing operation and the washing-by-softly beating operation alternately for a predetermined time period.SELECTED DRAWING: Figure 11

Description

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

  2. Description of the Related Art A drum type washing machine having a drum that is inclined substantially horizontally or forwards upward is known as a washing machine. A drum-type washing machine performs washing, rinsing, and dewatering processes by putting clothes into a drum that is inclined substantially horizontally or with its front facing upward. In the washing process and the rinsing process, the drum is rotated at a low speed to lift the clothes accumulated in the lower part of the drum and drop it from the upper part of the drum. By this tumbling operation, washing and rinsing are performed by applying mechanical force to the clothes. At the time of the dehydration process, the drum is rotated at a high speed, and centrifugal dehydration is performed by pushing out moisture from the clothes by the centrifugal force generated by the rotation.

  In the washing process, the washing water in the washing tub (outer tub) is pumped up by the circulation pump and applied to the clothes, and the washing water in which the detergent is dissolved is permeated into the clothes. As described above, the drum type washing machine can save water by securing the washing performance even with less water than the vertical washing machine.

  Patent Document 1 describes a drum type washing machine that performs tumbling washing (tapping washing).

JP 2013-199134 A

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

  For example, there is a method in which the drum is stopped and the laundry is immersed in the water in the drum. However, in this method, the detergent solution does not penetrate into the portion exposed from the water surface, and sufficient cleaning power cannot be obtained. In addition, because it is a ladle that does not add mechanical force, it must be left for a long time to obtain detergency.

  Further, there is a method of controlling the drum to rotate intermittently for a short time, but this method cannot obtain a sufficient cleaning power because the mechanical force applied to the clothing is short. If the washing time is extended in order to obtain a cleaning power, the mechanical force accumulated in the clothing also increases, and the clothing is damaged.

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

  SUMMARY OF THE INVENTION An object of the present invention is to provide a washing machine that secures cleaning power while suppressing damage to clothing.

  The present invention includes an outer tub that stores water therein, a drum that is rotatably supported in the outer tub, and stores clothes, a drum motor that rotationally drives the drum, and a water supply that feeds water into the outer tub Means, a circulation pump for supplying water sucked from the outer tub to a circulation flow path leading into the drum, and a control device capable of executing the washing operation by controlling the drum motor and the circulation pump. The control device performs a rice scrubbing operation in which the clothing moves so as to roll in the drum, and a soft scrubbing operation in which the clothing is dropped from a position lower than the top of the drum to perform a tumbling operation, The paddy washing operation and the soft paddle washing operation are alternately performed for a predetermined time.

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

BRIEF DESCRIPTION OF THE DRAWINGS It is an external appearance perspective view which shows the drum type washing-drying machine with which the washing machine of 1st Embodiment of this invention is applied. It is a side view which shows roughly the internal structure of the housing | casing of the drum type washing-drying machine of FIG. It is a perspective view which shows a circulation pump and a circulation flow path. (A) is a perspective view which shows the circulation flow path provided in an outer tank cover, (b) is a perspective view which shows the bellows hose which connects a circulation pump and the circulation flow path provided in an outer tank cover. (A) is a rear view of the outer tank cover, and (b) is a rear view of the outer tank cover in which the circulation channel is exposed. (A) is an enlarged rear view showing the vicinity of the discharge port of the circulation channel of the outer tub cover, and (b) is a schematic diagram showing the structure for attaching the watering member. (A) is an expanded sectional view of the vicinity of the discharge port along the AA line of FIG. 5 (a), (b) is an enlarged perspective view of the vicinity of the discharge port along the AA line. (A) is sectional drawing which shows the effect | action of the water sprinkling member when the flow volume of the washing water which has flowed through the circulation channel is small, (b) is the water spray member when the flow rate of the washing water which has flowed through the circulation channel is large. It is sectional drawing which shows an effect | action. It is explanatory drawing which shows the watering direction into a drum. It is a control block diagram in a drum type washing and drying machine. It is process drawing explaining the driving | operation process of washing operation. It is a figure which shows the principal part of the drum type washing-drying machine with which the washing machine of 2nd Embodiment of this invention is applied, (a) is a cross section of discharge port vicinity corresponding to the AA line of Fig.5 (a). In the figure, a cross-sectional view showing the action of the watering member when the flow rate of the washing water flowing through the circulation flow path is small, (b) is the action of the watering member when the flow rate of the washing water flowing through the circulation flow path is also large. FIG. It is a figure which shows the principal part of the drum type washing-drying machine with 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 Schematic sectional view showing the action of the water sprinkling member when the flow rate of the washing water flowing through the circulation flow path is small, (b) shows the action of the water sprinkling member when the flow rate of the washing water flowing through the circulation flow path 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-drying machine to which the washing machine of this invention is applied, (a) is an expansion rear surface of the 1st modification which shows the discharge port vicinity of the circulation flow path of an outer tank cover. FIG. 4B 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-drying machine to which the washing machine of this invention is applied, and is an expanded rear view of the 3rd modification which shows the discharge outlet vicinity of the circulation flow path of an outer tank cover. It is a figure which shows the modification of the principal part of the drum type washing-drying machine to which the washing machine of this invention is applied, and is an expanded rear view of the 4th modification which shows the discharge port vicinity of the circulation flow path of an outer tank cover.

  Next, the washing machine of the 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 it is not intended to limit the washing machine to which the present invention is applied. In each embodiment, the same parts are denoted by the same reference numerals, and redundant description is omitted. In the following description, the front-rear, up-down, left-right directions are based on the front-rear, up-down, left-right directions shown in FIG.

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

(First embodiment)
As shown in FIG. 1, the housing 1 constitutes an outer shell, and includes left and right side plates 1a and 1b, a front cover 1c, a back cover 1d (see FIG. 2), a top cover 1e, a lower front cover 1f, and a base. 1h. In the case 1, the left and right side plates 1a and 1b are coupled with 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). It has a box shape including the base 1h.

  Near the center of the front cover 1c, there is provided a door 9 that closes an insertion port for putting clothes in and out. 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 opened and closed. The door 9 is opened by releasing a lock mechanism (not shown) by operating a handle 9d provided on the door 9, and is locked and closed by pressing against the front cover 1c. The front reinforcing member 37 (see FIG. 2) has a circular opening for putting clothes 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 and 13, and a display 14 is provided in the upper center of the housing 1. The operation panel 6 is electrically connected to a control device 38 (see FIG. 2) provided at the lower part 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 can be attached with a drawer-type detergent tray 7 from the front opening. When putting detergents, 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 reinforcing member 36 of the housing 1. Further, a water outlet 19 a is provided slightly on the left side 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 parts such as a water supply electromagnetic valve 16 (see FIG. 1), a bath water absorption pump 17, and a water level sensor 34 are provided. A water supply unit 15 (water supply means) is provided in the upper opening of the detergent container 19. The top cover 1e is provided with a water supply hose connection port 16a (see FIG. 1) from a water tap and a water absorption hose connection port 17a (see FIG. 1) for remaining hot water in the bath.

  The drum 3 is a cylindrical washing and dewatering tub that is rotatably supported. The drum 3 has a large number of through holes (not shown) for water flow and ventilation on its outer peripheral wall and bottom wall. An opening 3a for taking in and out clothing is provided. 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 the horizontal or opening 3a side becomes higher.

  The outer tub 2 has a cylindrical shape, includes the drum 3 coaxially, has an open front surface, and a drum motor 4 attached to the outer center of the rear end surface. The rotating shaft of the drum motor 4 passes through the outer tub 2 and is coupled to the drum 3. An outer tank cover 2 d that enables water storage in the outer tank 2 is provided at 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 sealed with water by closing the door 9.

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

  On the bottom side 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 recess 2f is an inclined surface that descends from the front side to the rear side, and a drain port 21 is provided on the rear side of the recess 2f. A bellows hose 22 is connected to the drain port 21 via a joint 21a. A bottom circulating water inlet 18 is provided on the front side of the recess 2f.

  One end of the drainage hose 26 is connected to a water discharge port (not shown) of the circulation pump 24 described later, and the other end side extends outside the machine. The drainage hose 26 is provided with a drainage valve 25 in the middle of extension in the machine.

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

  An air trap 2e is provided at the lowermost part of the rear end face of the outer tub 2. A communication hole 2e1 communicating with the outer tub 2 (recessed portion 2f) is provided at the lower portion of the air trap 2e, and the upper portion of the air trap 2e and the water level sensor 34 are connected by a tube 35 so that the water level in the outer tub 2 is Is detected.

  A circulation pump 24, a filter case 23, and a drain valve 25 are provided between the outer tub 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 a detachable filter (not shown) is attached to the inside of the filter case 23 to collect foreign matter and lint in the washing water. As shown in FIG. 1, the filter case 23 can be easily attached and detached by opening the door 1g provided on the lower front cover 1f and turning the handle 23d. The filter case 23 is inclined so that the front side becomes higher. The washing water circulation system centering on the circulation pump 24 will be described in detail later.

  As shown in FIG. 2, a drying duct 29 is arranged inside the back surface of the housing 1. The drying duct 29 is connected to an intake port provided at the rear portion of the outer tub 2 by a rubber bellows hose 29a. A water cooling / 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, a blower fan, etc. (not shown), and moisture is evaporated from the clothes. The air that has become hot and humid is sucked into the drying duct 29, cooled and dehumidified by the water-cooled dehumidifying mechanism to become low-temperature air, heated by a heater (not shown), and then blown into the drum 3. A heat pump may be used instead of the heater and the water-cooled dehumidifying mechanism.

  Next, the circulation system of the washing water around 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. In the casing 42, discharge ports 44 and 45, a water inlet port 23a (see FIG. 2), and a water outlet port (not shown) are formed.

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

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

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

  As shown in FIG. 3, the discharge port 45 is connected to the joint 18 a via the bellows hose 40. This joint 18a is provided in the inflow port 18 formed so as to face the recess 2f (see FIG. 3A) at the bottom of the outer tub 2.

  When the circulation pump motor 47 of the circulation pump 24 rotates forward with the drain valve 25 (see FIG. 2) closed, the wash water in the outer tub 2 passes through the bellows hose 22 from the drain port 21 (see FIG. 2), and is filtered. 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 to the circulation flow path 27, and is discharged from the discharge portion 27a (see FIGS. 5A and 5B) described later to the drum 3 (see FIG. 2). ) Is sprinkled in.

  On the other hand, when the circulation pump motor 47 of the circulation pump 24 rotates in reverse, 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 in the filter case 23 (not shown). ) To remove 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 through 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 rotational speed is controlled by the control device 38 (see FIG. 2) as will be described later.

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

  As shown in FIG. 5 (b), the circulation flow path 27 is constituted by a tubular passage integrally formed on the inner peripheral wall of the resin outer tub cover 2d. The circulation flow path 27 is formed along the opening of the outer tank cover 2d, and communicates with a discharge part 27a formed at the upper part of the outer tank cover 2d. The circulation flow path 27 is covered with a flow path 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 preferably 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, it is damaged, for example, unlike the outer peripheral wall of the outer tank cover 2d formed of a vinyl chloride pipe or the like. There is less fear. Even if it is damaged, the washing water does not leak to the outside of the outer tub 2. Moreover, since the circulation flow path 27 is integrally formed with the outer tank cover 2d, the number of parts can be reduced.

  The discharge part 27a injects the wash water discharged from the discharge port 44 of the circulation pump 24 (see FIG. 4A) from the upper part of the outer tub cover 2d into the drum 3 (see FIG. 2). .

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

  The opening 27a1 of the discharge portion 27a is formed in a slit shape (arc shape) as shown in FIG. Accordingly, the washing water can be spread and sprayed in a thin film shape, and can be sprayed over a wide range in the left-right direction in the drum 3. In addition, since the circulation flow rate of the washing water in the circulation flow path 27 is increased as compared with the conventional case, even if the slit width (gap width) of the opening 27a1 is widened, the injection force is not weakened. Accordingly, for example, the slit width (gap width) can be set to 3 mm or more, and the opening 27a1 is more reliably prevented from being blocked by lint or the like.

  Moreover, the discharge part 27 is provided with the vertical wall 273 and the horizontal wall 274 continuing to the vertical wall 273, as shown to Fig.7 (a) (b). The vertical wall 273 is formed continuously with the side wall 27 c of the circulation channel 27. The vertical wall 273 is inclined from the side wall 27c side toward the opening 27a1 of the discharge section 27a. The horizontal wall 274 is formed continuously at the lower end of the vertical wall 273. The extending end of the horizontal wall 274 is located at a distance from the lower end of the flow path cover 27b, and an opening 27a1 of the discharge portion 27a is formed between the extended end of the horizontal wall 274 and the flow path cover 27b.

  As shown to Fig.6 (a), the water spray member 50 is attached to the discharge part 27a. The water sprinkling member 50 corresponds to the shape of the discharge part 27a from the upstream side to the downstream side in the washing water flow direction (from the upper side to the lower side in the figure) in the width direction (circumferential direction, left-right direction). It is made into the substantially fan shape which spreads gradually. The water sprinkling member 50 is formed in a sheet shape with a material having elasticity, for example, PET (polyethylene terephthalate). As will be described later, the water sprinkling member 50 is subjected to the washing water flowing through the circulation flow path 27 and is elastically deformable by receiving the pressure of the washing water. A plurality of insertion holes 52 (three) for attachment to the discharge portion 27a are formed in the upper end portion 51 of the water spray member 50. In the upper end 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 across 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 hit. Has been. As shown in FIG. 6B, the vertical wall 273 is provided with a plurality of pins 27e (three, see FIG. 6A) for attaching the watering member 50. The plurality of pins 27 e are provided corresponding to the respective insertion holes 52 of the water spray member 50. The water sprinkling member 50 is attached to the discharge part 27a by inserting each pin 27e through each insertion hole 52.

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

  As shown in FIG. 6B, a boss portion 27 d is provided on the flow path cover 27 b that covers the circulation flow path 27. The boss portion 27d is formed with 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 portion 51 of the water spray member 50 is sandwiched between the vertical wall 273 and the boss portion 27d. In FIG. 6B, the engagement relationship between the pin 27e and the engagement hole 27f is schematically shown. The water 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 portion of the water sprinkling member 50 is in a state where it floats from the corner 275 between the vertical wall 273 and the horizontal wall 274, that is, does not adhere to the corner 275, It arrange | positions in the state which has a clearance gap between. 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 part 55 of the water sprinkling member 50 is located in the opening 27a1 of the discharge part 27a. The distal end portion 55 is not fixed to the lateral wall 274 and is a free end. When the water spray member 50 is elastically deformed as will be described later, the distal end portion 55 is movable so as to be slightly retracted inward of the opening 27a1 following the elastic deformation.

  The water sprinkling member 50 hits the washing water flowing from the circulation flow path 27 toward the discharge portion 27a. At this time, the water sprinkling member 50 is elastically deformed by receiving the pressure of the washing water flowing into the discharge portion 27a. When the amount of washing water is small, that is, when the pressure of the washing water flowing at a low rotational speed of the circulation pump 24 is small (when the circulation pump 24 is at a low rotational speed), the watering member 50 is shown in FIG. As shown to a), the water sprinkling member 50 is excellent in elasticity, and the side cross-sectional shape is held in a substantially straight state.

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

  On the other hand, when the amount of washing water is large, that is, when the rotational speed of the circulation pump 24 is high, the pressure of the washing water hitting the watering member 50 increases the elasticity of the watering member 50 compared to when the rotational speed of the circulation pump 24 is low. The water spray member 50 is elastically deformed. In this case, as shown in FIG. 8B, the water spray member 50 has a shape in which the side cross-sectional shape is concavely curved toward the corner 275. The side surface of the water spray member 50 (the surface facing the opening 27a1) is recessed in a round shape, and the inclination angle of the tip of the water spray member 50 follows the concave shape, compared to when the rotational speed of the circulation pump 24 is low Be gentle. Thereby, the discharge direction of the wash water discharged from the opening 27a1 through the water sprinkling member 50 is the upward direction L2, as shown in FIG. 8B. In the upward direction L <b> 2, as shown in FIG. 9, the discharged washing water is sprinkled toward the approximate center on the back side of the drum 3.

  Thus, the sprinkling member 50 can change the form according to the amount of water flowing through the circulation passage 27, and can change the water sprinkling direction into the drum 3 in the vertical direction according to the change in form. It is. The water sprinkling member 50 has a small amount of elastic deformation when the amount of washing water is small and discharges the washing water in the downward direction L1, and the amount of elastic deformation increases when the amount of washing water is large. The washing water may be discharged in the direction L2.

  Note that a small hole communicating with the circulation flow path 27 may be formed in the outer tank cover 2d so as to be adjacent to the discharge part 27a. When the wash water is sprayed from the opening 27 a 1 of the discharge portion 27 a through the circulation channel 27, the wash water is sprayed from the small hole 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 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 in the drum type washing and drying machine.

  As shown in FIG. 10, the control device 38 includes a microcomputer 38a, a drive circuit 64, and the like, as well as on / off signals from the operation switches 12 and 13 and various sensors (water level sensor 34 and temperature sensor 62) shown in FIG. An input circuit for an output signal is also provided. Further, the control device 38 acquires various information signals in the user's operation, washing process (washing process, rinsing process, dehydration process), and drying process via the microcomputer 38a. In the control device 38, the microcomputer 38 a 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. In addition, the display 14 (see FIG. 1), the light emitting element 66, and the buzzer 67 are controlled in order to inform the user of information related to the drum type washing and drying machine.

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

  The finishing agent water supply electromagnetic 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 poured into the finishing agent charging chamber is poured into the outer tub 2 through the bellows hose 20 together with the finishing agent (softener) added.

  The outer tank water supply electromagnetic valve 16d supplies tap water from the water supply hose connection port 16a into 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 / dehumidification mechanism (not shown) of the drying duct 29 (see FIG. 2) through a water supply path (not shown).

  In addition, the bath water from the water absorption hose connection port 17a (see FIG. 1) pumped up by the bath water absorption pump 17 (see FIG. 2) is supplied into the outer tub 2 from the bellows hose 20 through a water supply path (not shown). Is done.

≪Operation process≫
Next, with reference to FIG. 11, the operation | movement process of a drum type washing-drying machine is demonstrated. FIG. 11 is a process diagram illustrating an operation process of a washing operation (washing-rinsing-dehydration) in the drum type washing / drying machine according to the first embodiment. In the following, the detergent water supply electromagnetic valve 16b is the first electromagnetic valve, the finishing agent water supply electromagnetic valve 16c is the second electromagnetic valve, the outer tank water supply electromagnetic valve 16d is the third electromagnetic valve, and the cooling water supply electromagnetic valve 16e is the fourth electromagnetic valve. It explains as a valve.

  As shown in FIG. 11, in step S <b> 1, the control device 38 receives a course selection input for the operation process of the drum type washing and drying machine (course selection). Here, the user opens the door 9, puts clothes to be washed into the drum 3, and closes the door 9. And a user selects and inputs the course of a driving process by operating the operation switches 12 and 13. 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 driving pattern from the driving pattern database based on the input driving process course, and proceeds to step S2. In the following description, it is assumed that the standard course (washing-rinsing twice-dehydration) is selected.

  In step S <b> 2, the control device 38 executes a step of detecting the weight (cloth amount) of the clothes put on 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 clothes before water injection. .

  In step S <b> 3, the control device 38 executes a process of calculating the detergent amount / 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 2a of the outer tub 2. Although not shown, the control device 38 detects the conductivity (hardness) of the supplied water via an electrical conductivity sensor (not shown) disposed on the inner bottom of the outer tub 2. Further, the temperature sensor 62 (see FIG. 10) detects the temperature of the supplied water. Thereafter, 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 put in and the operating time through map search based on the cloth amount, the water conductivity (hardness), and the water temperature detected in step S2. Then, the control device 38 displays the determined amount of detergent and operation time on the display unit 14. In addition, although it demonstrated as supplying water to the outer tank 2 and detecting the electrical conductivity (hardness) and water temperature of water, it is not restricted to this. For example, the electrical conductivity (hardness) and water temperature of water at 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 charging waiting process. For example, the control device 38 waits for a predetermined time and proceeds to step S5. The user puts detergents in the detergent tray 7 while referring to the amount of detergent displayed on the display unit 14 during standby. In addition, when the detergent tray 7 is closed after being opened by means (not shown) for detecting opening and closing of the detergent tray 7, the control device 38 proceeds to step S5 assuming that the detergent has been introduced. It may be.

  In step S5, the control device 38 executes a detergent dissolving process. For example, the control device 38 controls the water supply electromagnetic valve 16 (for example, opens the first electromagnetic valve), and supplies water to the detergent charging chamber via the water supply pipe. The detergent and water in the detergent charging chamber are supplied from the outlet through the detergent delivery pipe, the bellows hose 20, the water supply port 2 a on the upper rear side of the outer tub 2, and the 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 tub 2. When water is supplied to a predetermined amount of water, the control device 38 controls the water supply electromagnetic valve 16 (for example, closes the first electromagnetic valve) to stop water supply. And the control apparatus 38 performs a detergent melt | dissolution operation | movement.

  Specifically, the control device 38 controls the circulation pump 24 so that the water and the detergent sucked from the drain port 21 via the bellows hose 22 flow into the depression 2f via 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, go to the drain port 21, and circulate. Thereby, water and a detergent are stirred and a detergent is melt | dissolved in water. When a predetermined time (for example, 10 seconds) elapses, 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 in a forward / reverse direction at a predetermined rotational speed (for example, 35 rpm [r / min]) to change clothes. Further, the control device 38 controls the circulation pump 24 (circulation pump motor 47) so as to have a predetermined rotational speed, and provides wash water with a high concentration of detergent sucked from the drain port 21 at the opening of the outer tub 2. By discharging into the inside of the drum 3 from the opening 27a1 of the discharge portion 27a, the clothes inside the drum 3 are soaked.

  In this case, the control device 38 alternately controls the rotation speed of the circulation pump 24 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 wash water flowing through the circulation flow path 27 is reduced, and the pressure of the wash water hitting the water spray member 50 is also reduced. Accordingly, as shown in FIG. 8A, the water spray member 50 has excellent elasticity, and the discharge direction of the wash water discharged from the opening 27a1 through the water spray member 50 is a 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 wash water flowing through the circulation flow path 27 increases, and the pressure of the wash water hitting the water spray member 50 is increased. It will be in a state that exceeds elasticity. Then, as shown in FIG. 8B, the water spray member 50 is elastically deformed, and the washing water discharge direction becomes the upward direction L2.

  In the rotary water supply process 1, as described above, the rotation speed of the circulation pump 24 is alternately controlled to the low rotation speed and the high rotation speed by the control device 38. Accordingly, in the rotary water supply step, as shown in FIG. 9, the wash water discharged from the opening 27a1 is discharged sequentially with an angular 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 of the downward direction L1 and the upward direction L2. Thereby, washing water can be uniformly permeated into the clothes inside the drum 3. The control of the control device 38 may be one in which the rotational speed of the circulation pump 24 is alternately controlled to a low rotational speed and a high rotational speed at predetermined intervals. 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), water supply is stopped (for example, the first electromagnetic valve and the third electromagnetic valve are closed). When a predetermined time elapses after the rotation water supply process is started, the rotation water supply process is terminated, and the process proceeds to step S7.

  In step S7, the control apparatus 38 performs a pre-wash stirring process. In addition, a prewash stirring process is a process in which the washing water with high detergent density | concentration produced | generated by the detergent melt | dissolution process is immersed in clothing. Detergency is improved by soaking clothes with high detergent concentration.

  Specifically, the control device 38 alternately controls the rotational speed of the circulation pump 24 to a low rotational speed (for example, 1800 rpm) and a high rotational speed (for example, 3000 rpm), and from the drain port 21 (see FIG. 2). The sucked washing water is discharged into 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 controlled alternately between a low rotation speed and a high rotation speed, the discharge direction of the washing water is discharged with an angle θ difference between the downward direction L1 and the upward direction L2. Is done. Thereby, the washing water with a high detergent concentration can be uniformly permeated into the clothes inside the drum 3.

  Further, 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 are dropped from a position lower than the uppermost point of the drum 3. I have to. That is, in the pre-washing stirring step, the mechanical force generated when the clothes fall from above the drum 3 is reduced by reducing the height at which the clothes fall from above. When a predetermined time (for example, 5 minutes) elapses, the control device 38 ends the prewash stirring process and proceeds to step S8.

  In step S8, the control apparatus 38 performs the rotation water supply process 2. FIG. 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 in a forward / reverse direction at a predetermined rotational speed (for example, 35 rpm [r / min]) to change clothes. Further, the control device 38 controls the circulation pump 24 (circulation pump motor 47) so as to have a predetermined rotational speed, and provides wash water with a high concentration of detergent sucked from the drain port 21 at the opening of the outer tub 2. By discharging into the inside of the drum 3 from the opening 27a1 of the discharge portion 27a, the clothes inside the drum 3 are soaked.

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

  Then, when the water level of the washing water in the outer tub 2 rises to a predetermined water level (high water level), water supply is stopped (for example, the first electromagnetic valve and the third electromagnetic valve are closed). When a predetermined time elapses after the rotation water supply process is started, the rotation water supply process is terminated, and the process proceeds to step S9.

  In step S9, the control device 38 executes a main washing stirring process. In the main washing stirring step, for example, a soft tap washing step and a fir washing step are executed. The soft tapping process is to lift the clothes accumulated in the lower part of the drum 3 by the rotation of the drum 3 and to drop the clothes from the upper part in the drum 3 by gravitational force over the centrifugal force on the clothes. This is a 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 rotational speed of the circulation pump 24 to a low rotational speed (for example, 1800 rpm) and a high rotational speed (for example, 3000 rpm), and from the drain port 21 (see FIG. 2). The sucked washing water is discharged into 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 controlled alternately between a low rotation speed and a high rotation speed, the discharge direction of the washing 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 uniformly penetrates the clothes inside the drum 3.

  Further, the control device 38 controls the drum motor 4 to rotate the drum 3 in a forward and reverse direction at a predetermined rotational speed (for example, 35 rpm), thereby softly washing the clothes inside the drum 3. When a predetermined time (for example, 2 minutes) elapses, the control device 38 ends the beat washing process and proceeds to the rice washing process.

  The paddy washing process is a mechanical process that is weaker than tapping and washing clothes while the clothes gathered in the lower part 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). It is a process to give power. In other words, in the paddy washing process, the clothes are operated while rolling with the rollers in the lower part of the drum 3.

  Specifically, the control device 38 alternately controls the rotational speed of the circulation pump 24 to a low rotational speed (for example, 1800 rpm) and a high rotational speed (for example, 3000 rpm), and from the drain port 21 (see FIG. 2). The sucked washing water is discharged into 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 controlled alternately between a low rotation speed and a high rotation speed, the discharge direction of the washing 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 uniformly penetrates 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 and reverse direction at a predetermined rotation speed (for example, 30 rpm) (for example, the drum 3 is reversed left and right at a rotation angle of 20 to 60 °). As a result, the clothes inside the drum 3 are washed. In addition, when a predetermined time (for example, 1 minute) elapses, the control device 38 ends the paddy washing process and performs the soft tap washing process again.

  When a predetermined time (for example, 10 minutes) elapses in Step 9, the control device ends the soft scrubbing process or the rice washing process, and proceeds to one 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 and opens the drain valve 25 to drain the washing water in the outer tub 2. The water level sensor 34 continues to monitor 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 a 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. In a state where the drain valve 25 is kept open, the control device 38 rotates the drum 3 in the reverse direction at a high speed (for example, 700 rpm) to dehydrate the washing water contained in the clothes. When the predetermined time has elapsed, the control device 38 ends the dehydration process 1 and proceeds to Step 12.

  In step S12, the control device 38 executes a rotary shower process. The control device 38 closes the drain valve 25 and controls the water supply electromagnetic valve 16 (for example, opens the third electromagnetic valve) while rotating the drum 3 in the reverse direction at a medium speed (for example, 100 rpm). Spray water on clothing. The control time of the water supply solenoid valve 16 (third solenoid valve) at this time is determined based on the cloth amount detected in step S2. When the predetermined time has elapsed, water supply is stopped (for example, the third electromagnetic 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 it from the drain port 21 (see FIG. 2). The rinsing water is discharged into the drum 3 from the opening 27a1 (see FIG. 6A) of the discharge portion 27a of the outer tub 2. Since the rotation speed of the circulation pump 24 is alternately controlled to a low rotation speed and a 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 rinse water is efficiently sprinkled on the clothes inside the drum 3. When a predetermined time elapses, 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 S <b> 13, the control device 38 performs two dehydration processes. In the state where the drain valve 25 is kept open, the control device 38 rotates the drum 3 in the reverse direction at a high speed (for example, 700 rpm) to dehydrate the washing water contained in the clothes. When the predetermined time has elapsed, the control device 38 ends the dehydration process 2 and proceeds to the rinse process 2 (steps S14 to S16).

  In step S14, the control apparatus 38 performs a water supply process. 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 rinse water into the outer tub 2. When the water level rises to a predetermined 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 proceeds to step S15.

  In step S15, the control device 38 executes a finishing agent (softener) water supply process. The control device 38 controls the water supply electromagnetic valve 16 (for example, opens the second electromagnetic valve) to supply rinse water containing a soft finish into the outer tub 2, and in step S14, the outer tub 2 is supplied. The rinse water supplied inside and the rinse water containing the softener are mixed.

  In step S <b> 16, the control device 38 executes a rotary water supply / makeup 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 tub 2. When water is supplied to a predetermined water level, water supply is stopped (for example, the first electromagnetic valve and the third electromagnetic 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 it from the drain port 21 (see FIG. 2). The rinsing water is discharged into the drum 3 from the opening 27a1 (see FIG. 6A) of the discharge portion 27a of the outer tub 2. In this case, since the rotational speed of the circulation pump 24 is alternately controlled to a low rotational speed and a high rotational speed, the discharge direction of the rinse water containing the soft finish is an angle between the downward direction L1 and the upward direction L2. Discharged with θ difference. As a result, the soft finish uniformly penetrates into the clothes inside the drum 3.

  In step S <b> 17, the control device 38 executes a rinse stirring process. The rinsing and agitation process is similar to soft tapping, in which the clothes accumulated in the lower part of the drum 3 are lifted by the rotation of the drum 3 and the gravity is higher than the centrifugal force on the clothes. It 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 it from the drain port 21 (see FIG. 2). Rinse water is discharged from the opening 27a1 (see FIG. 6A) of the discharge portion 27a of the outer tub 2 into the drum 3 to rinse the clothes. Also in this case, since the wash water is discharged with an angle θ difference between the downward direction L1 and the upward direction L2, rinsing of clothes is promoted. And when predetermined time passes, the control apparatus 38 will complete | finish a rinse stirring process, and will progress to a spin-drying | dehydration process (step S18, S19).

  In step S18, the control apparatus 38 performs a drainage process. The control device 38 stops the drum motor 4 and the circulation pump 24 and opens the drain valve 25 to drain the rinse water in the outer tub 2. The water level sensor 34 continues to monitor 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 a predetermined water level, the control device 38 ends the drainage process and proceeds to step S19.

  In step S19, the control apparatus 38 performs a dehydration process. Specifically, the control device 38 opens the drain valve 25 and controls the drum motor 4 to rotate the drum 3 at a high speed (for example, 600 rpm) to centrifugally dehydrate the clothing. 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, it is possible to ensure high cleaning performance while suppressing damage to clothes by both the soft tapping process and the wash process.

  In the soft tapping process, the rotation speed of the drum 3 is set to a low speed (for example, 35 rpm) so that 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. Thereby, the cloth damage which clothing receives by a drop impact can be reduced.

  In the paddy washing process, the clothes accumulated below 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 the clothes are mechanically weaker than the soft tapping washing. Give power. 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. Thereby, the cloth damage which clothing receives by a 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 / reverse direction (for example, the drum 3 is reversed left and right at a rotation angle of 20 to 60 °). That is, the drum rotates in the same direction once or less, so that the clothes can be prevented from being intertwined and pulled, and the cloth damage caused by the expansion and contraction can be reduced.

  Moreover, in order to wet clothes, it is necessary to pass through the water film formed with the wash water and the rinse water sprayed from the opening part side of the outer tank 2, but the one where the area of a water film is large can contact many clothes. Therefore, clothes can be efficiently wetted. In order to increase the area of the water film, it is preferable to spray washing water and rinsing water diagonally from the opening side of the outer tub 2 toward the bottom surface of the drum 3 or the inner circumferential surface of the cylinder. It is desirable that the discharge port of the excess water is an upper part on the opening side of the outer tub 2. Therefore, in order to allow the garment to contain rinsing water or rinsing water, the garment must be lifted to a position at least higher than the water film, and the mechanical force that the garment receives due to falling increases and the garment is damaged. Moreover, in order to keep moisture in a clothing, it is necessary to perform a tumbling operation continuously, and the clothing is damaged. However, according to the present embodiment, the rotational speed of the circulation pump 24 is alternately controlled to a low rotational speed (for example, 1800 rpm) and a high rotational speed (for example, 3000 rpm), and from the drain port 21 (see FIG. 2). The sucked washing water and rinsing water are sprinkled 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. That is, the washing water and the rinsing water can be uniformly included in the clothes without increasing the circulation flow rate of the rinsing water and the rinsing water.

  As a result, even when the clothes fall from the top, such as the soft tapping process and the rice washing process, the washing water and the rinsing water can be uniformly included in the clothes, and the damage to the clothes is suppressed. High cleaning performance can be secured.

  By the way, the paddy washing process repeats forward / reverse inversion while the rotation of the drum 3 is one rotation or less. Since the current flowing through the drum motor 4 increases when the drum 3 starts to rotate, the temperature of the drum motor 4 is likely to increase during the rice washing process. In this embodiment, the soft scrubbing process and the hand washing process are alternately repeated. The temperature of the drum motor 4 that has increased in the rice washing process is suppressed from increasing in the soft tapping process. Thereby, the temperature rise 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 the pre-washing stirring step. Thereafter, in step S8, the control device 38 sets the water level for washing to a predetermined water level (high water level) and performs additional water supply in step S9. That is, the pre-washing stirring process has a smaller amount of water than the main-washing stirring process, and the detergent concentration is relatively high. As a result, a high detergency can be obtained in the pre-washing agitation process. In the main washing agitation process, the clothing lifted upward by the drum 3 falls on the raised water surface, so that the drop impact is suppressed and the clothing is 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 ensure high cleaning performance while suppressing damage to clothing that is repeatedly executed by alternately performing the soft tapping process and the hand washing process. .

  In addition, by spraying water over a wide area inside the drum 3, even in the process where the clothes fall from the top, such as the soft scrubbing process and the rice washing process, the washing water and rinsing water are uniformly included in the clothes. High cleaning performance can be ensured while suppressing damage to clothing.

  Here, the high washing performance can be ensured because, for example, in the main washing stirring process, the clothes fall in a state where sufficient washing water penetrates the entire clothes lifted by the rotation of the drum 3, This is because the washing water contained in the clothing is pushed out of the clothing along with the dirt due to the impact of dropping (striking). Moreover, since washing water permeates the entire clothing, 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, it is excellent in productivity of the drum type washing and drying machine.

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

(Second Embodiment)
With reference to FIG. 12, the drum type washing / drying machine of 2nd Embodiment is demonstrated. The present 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 protrusion 28 is provided on the inner surface of the flow path cover 27b. The guide projection 28 is formed in a substantially triangular shape in cross section, and includes an inclined surface 28 a that descends from the upstream side toward the upper surface of the water spray member 50. The guide protrusion 28 serves to guide (guide) the washing water and the rinsing water flowing through the circulation flow path 27 to the water spray member 50 through the inclined surface 28a as shown in FIGS. 12 (a) and 12 (b). The guide protrusion 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, the water sprinkling member 50 is used when the amount of washing water is small, that is, when the pressure of the washing water flowing at a low rotational speed of the circulation pump 24 is small (the circulation pump 24 is low). At the time of rotation), the water spray member 50 has excellent elasticity and the side cross-sectional shape is held in a substantially straight state. In this case, the washing water is suitably guided to the water spray member 50 through the inclined surface 28 a of the guide protrusion 28.

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

  In the drum type washing / drying machine of the present embodiment, since the washing water is guided to the water sprinkling member 50 through the guide protrusion 28, an advantage that the water sprinkling member 50 is easily elastically deformed can be obtained. As a result, the washing water can be discharged with good response in the downward direction L1 and the upward direction L2 according to the amount of the washing water.

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

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

  As shown to Fig.13 (a), 50 A of watering members have the substantially L-shaped side cross-sectional shape. 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 (inside the drum 3). The upper part 56 and the lower part 57 are bent at an obtuse angle.

  As shown in FIG. 13B, the water sprinkling member 50A is used when the amount of washing water is small, that is, when the pressure of the washing water flowing at a low rotational speed of the circulation pump 24 is small (the circulation pump 24 is low). At the time of rotation), the water spray member 50 has excellent elasticity, and the side cross-sectional shape is maintained in an initial obtuse angle state. Thereby, 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 washing water is large, that is, when the rotational speed of the circulation pump 24 is high, the washing that hits the sprinkling member 50A compared to when the rotational 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 part 56 and the lower part 57 is widened, and the washing water guided to the water spraying member 50A and discharged into the drum 3 is in the downward direction L1.

  That is, the watering member 50A of the present embodiment can be elastically deformed according to the amount of washing water, exhibits a form in which the watering direction is upward when the amount of washing water is small, and the amount of washing water is large. The water spray direction is elastically deformed into a downward direction. That is, when the amount of water is small and small, the relationship between the elastic deformation and the first embodiment is opposite.

  In the drum type washing / drying machine of the present embodiment, the configuration is further simplified as compared with those of the first and second embodiments. Moreover, since the lower part 57 protrudes in the drum 3, a discharge direction (discharge angle) can be adjusted easily.

  In addition, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably. For example, in the above-described embodiment, the drum type washing / drying machine has been described, but the same applies to a drum type washing machine having no drying function. The present invention can also be applied to a vertical washing machine having a circulation pump.

  Moreover, as shown to Fig.14 (a), you may attach the substantially square watering member 50B in the substantially fan-shaped discharge part 27a. In this case, the discharge direction of the wash water discharged from the region where the water sprinkling member 50B is arranged can be changed in the vertical direction according to the amount of wash water. Moreover, since the area | region which can change the discharge direction of washing water is provided with the area | region which is not changed, it can have a change in the discharge direction of washing water. In addition, a variation can be given to a discharge direction by changing arrangement | positioning of the water sprinkling member 50B.

  Moreover, as shown in FIG.14 (b), the discharge part 27a may be formed in a substantially square shape, and the substantially square watering member 50B may be arrange | positioned.

  Thus, the shape of the discharge part 27a and the shape of the water sprinkling member 50B can be made into various shapes.

  Moreover, as shown in FIG. 15, in the substantially fan-shaped discharge part 27a, you may comprise the watering member 50C divided | segmented into three watering members 50C1, 50C2, and 50C3. Also in this case, the same effect as that described in the first embodiment can be obtained.

  In this case, the elasticity of the three water sprinkling members 50C1, 50C2, and 50C3 may be made different by making the sheet thicknesses and materials different. It is also possible to vary the discharge direction of the washing water in the circumferential direction by making the elasticity different.

  Further, as shown in FIG. 16, even if a vertical flap 273 of the discharge portion 27a is provided with a hard flap (watering member) 50D that can swing in the vertical direction via a hinge 58a, the flap 50D is supported by the watering member 58. Good. As the watering member 58, a synthetic rubber member can be used.

  In this case, the water sprinkling member 58 can change the swing position according to the amount of washing water, and when the amount of washing water is small, the sprinkling direction is an upper position (non-swing position, initial position). is there. Further, the water sprinkling member 58 receives the pressure of the washing water when the amount of the washing water is large, and swings downward around the hinge 58 a against the elasticity of the water sprinkling member 58. Thereby, a watering direction becomes a downward direction.

  Moreover, the above-mentioned water spray member 50, 50A-50C is good also as a product made from a synthetic rubber.

  Moreover, the watering member 50 is not necessarily required, and the watering direction may be swung without the watering member 50.

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

Claims (3)

An outer tank for storing water inside,
A drum that is rotatably supported in the outer tub and in which clothing is stored;
A drum motor for rotating the drum;
Water supply means for supplying water into the outer tub;
A circulation pump for supplying water sucked from the outer tub to a circulation flow path leading into the drum;
A control device capable of controlling the drum motor and the circulation pump to execute a washing operation,
The controller is
A scrubbing operation in which clothes move so as to roll in the drum,
Performing a soft scrubbing operation in which clothing is dropped from a position lower than the top of the drum to perform a tumbling operation,
The washing machine is characterized in that the fir washing operation and the soft tapping operation are alternately performed for a predetermined time. The washing machine according to claim 1, wherein
The controller is
Execute the first washing step that is the pre-washing stirring step and the second washing step that is the main washing stirring step,
The amount of water in the first washing step is less than that in the second washing step. The washing machine according to claim 1 or 2,
The controller is characterized in that the shower discharged by the pump motor of the circulation pump moves and spreads on clothes by changing the rotation speed of the circulation pump within a predetermined range.

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