JP2015217181A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine which has improved washing power.SOLUTION: A washing machine includes: an outer tub; an inner tub supported rotatably inside the outer tub; a rotary blade board provided rotatably at a bottom part of the inner tub; and a circulation pump for circulating washing water by pumping the washing water stored at the bottom part of the outer tub and returning it to the inner tub. A circulation flow rate is made to be equal to or greater than 30 L/min by driving the circulation pump.

Description

  The present invention relates to a washing machine that performs washing by circulating washing water.

  The washing machine can obtain a high detergency while reducing the physical force acting on the laundry by effectively utilizing the chemical detergency of the detergent in the washing process. In recent years, energy saving of home appliances has been promoted to prevent global warming. Water saving is effective in a washing machine. However, if the amount of water is reduced, the washing water does not reach the laundry sufficiently, and the cleaning power and excessiveness deteriorate. Therefore, a washing machine having a washing water circulation mechanism is proposed in which washing water accumulated at the bottom of the washing tub is pumped up to the top of the washing tub with a circulation pump and the drawn washing water is sprayed on the laundry (clothing). Yes. For example, the following Patent Document 1 describes that a circulation pump is also provided in a so-called vertical washing machine in which a rotary blade called a pulsator is arranged at the lower part of a washing tub.

JP 2012-223305 A

  However, even in a vertical washing machine having such a circulation pump, the circulation flow rate was about 20 L / min. In such a circulation flow rate, it takes time for the circulating water to penetrate into the laundry in the washing tub, or depending on the location of the laundry, there may be a place where there is little circulating water to penetrate and adhere to the laundry. There was also a possibility that a situation where it was difficult to obtain the effect of removing the soiled stains occurred.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a washing machine having improved cleaning performance.

  The present invention relates to an outer tub, an inner tub that is rotatably supported in the outer tub, a rotary vane that is rotatably provided at the bottom of the inner tub, and a laundry that is stored at the bottom of the outer tub. In a washing machine comprising a circulation pump that draws water and circulates by returning the washing water into the inner tub, the circulation flow rate is set to 30 L / min or more by driving the circulation pump. .

  According to the present invention, a washing machine with improved cleaning performance can be provided.

It is an appearance perspective view showing a washing machine concerning an embodiment of the present invention. It is a longitudinal section showing a schematic structure of a washing machine concerning an embodiment of the present invention. It is a perspective view which shows the outer tank which accommodated the inner tank. It is a top view when an outer tank cover is seen from the back side. It is a perspective view which shows the inside of a waterway cover. It is a top view which shows the inside of a waterway cover. It is AA arrow sectional drawing of FIG. FIG. 5 is a cross-sectional view taken along line B-B in FIG. 4. It is CC sectional view taken on the line of FIG. It is a schematic diagram which shows a shower shape. (A) Side sectional drawing which shows the positional relationship of the laundry height and shower in this embodiment, (b) is a sectional side view which shows the positional relationship of the laundry height and shower in a comparative example. It is a block diagram which shows the control system of the washing machine which concerns on embodiment of this invention. It is a flowchart which shows a part of control process of the washing machine which concerns on embodiment of this invention. It is a flowchart which shows another part of control processing of the washing machine which concerns on embodiment of this invention. (A) It is a perspective view which shows the circulation flow path formed in the side surface of an inner tank, (b) It is sectional drawing which shows the circulation flow path formed in the side surface of an inner tank. It is a graph which shows the relationship between a circulation flow rate and a washing | cleaning ratio. It is the table | surface which showed the operation | movement of the circulation pump in each process.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate. In the following description, a washing machine that can perform washing, rinsing, dehydration, and drying (a so-called vertical washing and drying machine) will be described as an example. However, a vertical type that can perform washing, rinsing, and dehydration is described. It can also be applied to other washing machines (so-called fully automatic washing machines).

  FIG. 1 is an external perspective view showing a washing machine according to an embodiment of the present invention. FIG. 1 shows a state where the outer lid 3 is opened.

  As shown in FIG. 1, the washing machine 100 includes a housing 1 whose outer shell is configured by combining a steel plate and a resin molded product. A resin top cover 2 is provided on the top of the housing 1. The top cover 2 is provided with an outer lid 3 that opens and closes the upper part of the washing tub.

  The outer lid 3 is configured to open an opening 1a formed in the upper portion of the housing 1 by opening it rearward while being bent in a mountain shape so as to be convex upward. The outer lid 3 includes an operation panel 8 including various operation button switches 6 and a display 7. The operation panel 8 is electrically connected to a microcomputer 40 (hereinafter abbreviated as a microcomputer) provided at the bottom of the machine body. A power switch 5 for turning on / off the washing machine 100 is provided on the front surface of the top cover 2. Further, a water supply electromagnetic valve 4 (see FIG. 2) is provided behind the opening 1a inside the housing 1, and a connection port 4a (FIG. 2) for supplying tap water (fresh water) to the water supply electromagnetic valve 4 is provided. Is provided at the rear of the top cover 2. The top cover 2 is provided with a detergent / finishing agent container 28, and the detergent / finishing agent container 28 is covered with the outer lid 3 when the outer lid 3 is closed.

  FIG. 2 is a longitudinal sectional view showing a schematic structure of the washing machine according to the embodiment of the present invention.

  As shown in FIG. 2, the washing machine 100 includes an inner tub 9, an outer tub 10, a pulsating blade 11 (rotary blade), a fluid balancer 12, a washing water circulation mechanism 50, and the like in the housing 1. ing.

  The inner tub 9 functions as a washing / dehydrating tub, is formed in a bottomed cylindrical shape, and has a rotation axis in the vertical direction (vertical direction). The inner tub 9 has a plurality of small through holes 9a for water passage and ventilation on the outer peripheral wall thereof, and a plurality of through holes 9b for water passage and ventilation on the bottom wall thereof. Yes. The inner tank 9 is rotatably supported by the driving device 13.

  The outer tub 10 is formed in a bottomed cylindrical shape, and encloses the inner tub 9 on the same axis. In addition, the outer tub 10 has four support rods that are suspended and suspended from corner plates (not shown) provided at the four corners of the upper end of the casing 1 via a shock absorber (not shown). Elastically supported at the center of the body 1.

  An outer tank cover 14 is provided at the upper edge of the outer tank 10. The outer tank cover 14 is configured to close the upper part of the inner tank 9.

  The pulsating blade 11 (also referred to as a pulsator) is formed in a substantially disk shape and is provided at the bottom of the inner tank 9. Further, the pulsating blade 11 is rotatably supported by the driving device 13. Accordingly, the washing water can be stirred together with the laundry by rotating the rotary blade 11 at the time of washing or rinsing.

  The fluid balancer 12 is formed in a ring shape with synthetic resin or the like, and is provided at the upper edge (upper edge) of the body plate of the inner tank 9. The fluid balancer 12 is configured by enclosing a fluid having a large specific gravity (such as salt water) inside, and when the eccentricity occurs due to the bias of the laundry when the inner tub 9 rotates, the fluid balancer 12 It has the function of canceling eccentricity by movement and maintaining the balance of rotation.

  The drive device 13 includes an electric motor 13a that uses an inverter-driven electric motor or a reversible rotation type capacitor phase-separated single-phase induction motor, an electromagnetically operated clutch mechanism (clutch) 13b, and a planetary gear reduction mechanism. In addition, the driving device 13 controls the electric motor 13a and the clutch 13b by the microcomputer 40 so that the inner tub 9 is locked so as to be stationary or released so that it can freely rotate. It has a function of selectively executing a washing drive mode for forward / reverse rotation and a dewatering drive mode for integrally rotating the inner tub 9 and the pulsating blade board 11 in the same direction.

  The washing water circulation mechanism 50 includes a circulation pump 16, a circulation pipe 17 (circulation path, return path), a circulation water path 18, and the like.

  The circulation pump 16 is provided at the bottom of the housing 1 (below the outer tub 10), and the washing water stored at the bottom of the outer tub 10 through the circulation pipe 17 is provided at the bottom of the outer tub 10. It has a function of pumping up from the vent 10b toward the washing water inlet 14b of the circulation channel 18. In the present embodiment, the circulation pump 16 is disposed on the left side of the bottom of the housing 1, and the circulation pipe 17 extends upward in the front of the outer tub 10 and faces backward in the upper portion of the outer tub 10. Instead, it passes through the left side of the opening 1a and is connected to the washing water inlet 14b located at the left end of the outer tub cover 14 (see FIG. 2). By reducing the length of the circulation pipe 17 in this way (comprising the shortest length), the pressure loss with respect to the washing water can be reduced.

  The circulation pipe 17 constitutes a flow path that allows the water flow vent 10 b of the outer tub 10 and the washing water introduction port 14 b to communicate with each other, and the circulation pump 16 is provided in the middle of the circulation pipe 17. The inner diameter (diameter) of the circulation pipe 17 is formed larger than the inner diameter (diameter) of the conventional circulation pipe. For example, the inner diameter of the circulation pipe 17 is 32.5 mm, and the inner diameter of the conventional circulation pipe is 19.5 mm. Thus, by making the circulation pipe 17 thicker than before, the pressure loss when the washing water flows can be reduced, and the circulation flow rate of the washing water flowing through the circulation pipe 17 can be increased as compared with the conventional one. .

  The circulation pipe 17 is provided with a foreign matter trap (first filter) (not shown) upstream of the circulation pump 16, and a drainage hose 24 provided with a drainage valve 15 is branched upstream of the foreign matter trap. It is connected.

  When the circulation pump 16 is driven, the washing water at the bottom of the outer tub 10 passes through the circulation pipe 17 from the water vent 10b formed at the bottom of the outer tub 10 and passes through the outside of the outer tub 10 to the upper part of the outer tub 10. And is introduced into the circulating water channel 18 from the washing water inlet 14 b and circulates back from the circulating water channel 18 into the inner tub 9.

  On the other hand, in this embodiment, in addition to the circulation flow path using the circulation pump 16, the washing water is lifted and sprinkled into the inner tub 9 by the centrifugal force generated by the rotation of the rotating blade 11 provided with blades on the lower surface. It also has a separate circulation channel. This other circulation channel is formed by attaching circulation channel members 51 and 52 at two locations in the circumferential direction on the inner peripheral surface of the inner tank 9 as shown in FIG. These two circulation flow path members 51 and 52 are provided at positions facing each other around the rotation axis of the inner tank 9.

  The circulation channel members 51 and 52 are configured by substantially plate-like members extending in the vertical direction with a predetermined width, and inflow portions 51a and 52a are formed on the upstream side of the circulation channel members 51 and 52, Waste thread filters (second filters) 51b and 52b are attached to the downstream side. As shown in FIG. 15, the inflow portions 51 a and 52 a form a water inlet with the side wall of the bottom of the inner tub 9, and the water from the bottom of the rotary blade 11 is rotated with the rotation of the rotary blade 11. Is sucked. Water flowing into the water channel between the circulation channel members 51 and 52 and the inner tank 9 wall surface from the inflow port vigorously flows upward in the water channel, and the lint is collected by the lint filters 51b and 52b. Then, it flows into the inner tank 9.

  The lint filters 51b and 52b have a position where the lower end of the mesh-shaped filter portion is lower than half the height of the inner tank 9 so that the circulating water can reach and collect lint even if the water level is low. It has become.

  In addition, as shown in FIG. 2, the washing machine 100 includes a drying unit 60 that functions during a drying operation. The drying unit 60 can be configured by a known method, and a blower fan 19 (see FIG. 12) is connected to a drying duct 22 (only part of which is shown) that allows the bottom of the outer tub 10 and the outer tub cover 14 to communicate with each other. It is configured by including a heater 20 (see FIG. 12), a lint filter (not shown), and a dehumidifying mechanism (not shown). Thus, by operating the blower fan and energizing the heater, warm air is blown into the inner tub 9, the laundry in the inner tub 9 is warmed, and moisture evaporates. The high-temperature and high-humidity air passes through the drying duct to become low-humidity air by the dehumidifying mechanism, is heated again by the heater, and circulates so as to be blown into the inner tank 9.

  The washing machine 100 includes rubber bellows tubes 29a, 29b, 29c, and 29d. These bellows tubes 29a to 29d are the outer tub 10 and the outer tub cover 14 provided on the vibration displacement side, the drying duct 22 provided on the fixed side (such as the housing 1 and the top cover 2), the water supply electromagnetic valve 4, and the circulation pump 16. Used for connection with

  FIG. 3 is a perspective view showing an outer tank containing the inner tank. FIG. 3 shows a state where an inner lid (not shown) provided on the outer tank cover 14 is removed.

  As shown in FIG. 3, the outer tub cover 14 has a substantially trapezoidal laundry input port 14 a (input port) formed on the front side. The outer tub cover 14 is provided with an inner lid (not shown) that opens and closes the laundry input port 14a. The inner lid is configured to close the entire laundry input port 14a via a hinge mechanism (not shown) provided at the rear end of the laundry input port 14a.

  The outer tub cover 14 has a washing water introduction port 14b for introducing washing water into the inner tub 9 and a hot air introduction port 14c for introducing warm air into the outer tub 10 behind the laundry input port 14b. A water supply inlet 14d for introducing water from the water tap is provided. The washing water inlet 14b is located at the left end.

  The pulsating blade 11 includes a plurality of raised portions 11a formed of a plurality of inclined surfaces that are gently inclined in the rotational direction so as to repeatedly generate vertical movement in the laundry on the upper surface by rotating. And a through hole 11b. The raised portion 11a has a surface that inclines in the circumferential direction and inclines in the radial direction so that the outer peripheral portions are sequentially increased. In the present embodiment, two raised portions 11a (only one is shown) are provided, but the number is not limited to two and may be three or more. Further, the raised shape of the pulsating blade 11 is an example and is not limited to this embodiment.

  As the pulsating blade 11 rotates, the laundry on the pulsating blade 11 rotates in the rotational direction of the pulsating blade 11 while sliding on the pulsating blade 11, and is pushed up and down by the raised portion 11a. Vibrate in the direction. At this time, the washing water can be spread over the laundry by sprinkling water from above the laundry while circulating the washing water. By doing so, the laundry can be washed without storing the washing water so that the laundry is immersed in the washing water in the inner tub 9, and water can be saved drastically. By the way, if the washing water can be evenly sprayed on the laundry, the cleaning power is improved, which leads to shortening of the washing time. A detailed configuration for uniformly spraying the washing water will be described later.

  FIG. 4 is a plan view of the outer tub cover as viewed from the back side. FIG. 4 shows a state in which the water channel cover 30 is attached to the outer tank cover 14.

  As shown in FIG. 4, the laundry insertion opening 14 a is positioned rearward of the center O in the radial direction and is positioned forward of the center O and the straight portion 14 a 1 extending in the left-right direction (width direction). A linear portion 14a2 extending in the left-right direction, an arc portion 14a3 connecting one end (left end) of the linear portion 14a1 and one end (left end) of the linear portion 14a2, and the other end (right end) of the linear portion 14a1 and the linear portion 14a2. Arc part 14a4 which connects the other end (right end). In addition, the shape in planar view of the laundry input port 14a is not limited to the shape of FIG. 4, For example, the linear part 14a2 is circular arc shape, and may be formed in the substantially radial shape as a whole. . Further, the outer peripheral portion of the laundry input port 14 a of the outer tub cover 14 is opposed to the fluid balancer 12.

  The water channel cover 30 is provided on the back surface of the outer tank cover 14 (the surface on the inner tank 9 side), so that the water channel cover 30 and the outer tank cover 14 constitute the circulation water channel 18. Further, the water channel cover 30 has a substantially triangular shape in a plan view, and has a discharge port 31 (return port) extending linearly along the straight portion 14a1 of the laundry input port 14a. The discharge port 31 is formed shorter than the straight portion 14a1.

  In addition, the water channel cover 30 has the washing water inlet 14 b located on one end side (left end side) of the discharge port 31. Further, the water channel cover 30 extends from the linear outer peripheral portion 32a extending along the straight portion 14a1 and from one end (left end, right side in the drawing) of the outer peripheral portion 32a toward the washing water inlet 14b. The outer peripheral portion 32b has an outer peripheral portion 32c extending from the other end (right end, left side in the drawing) of the outer peripheral portion 32a toward the washing water inlet 14b. Further, the outer peripheral edge of the water channel cover 30 is fixed to the outer tub cover 14 with screws at a plurality of locations. Further, the outer peripheral edge portion of the water channel cover 30 and the outer tub cover 14 are configured to be watertight via a packing (not shown).

  Thus, in the present embodiment, the outer tub cover 14 and the water channel cover 30 constitute the circulation water channel 18 that leads from the washing water introduction port 14 b to the discharge port 31. By configuring one surface (upper surface) of the wall of the circulating water channel 18 with the outer tub cover 14, the amount of protrusion protruding downward (inner tub 9 side) from the outer tub cover 14 can be reduced, and the washing water is located at a higher position. Can be sprayed from.

  FIG. 5 is a perspective view showing the inside of the water channel cover, and FIG. 6 is a plan view showing the inside of the water channel cover. FIG. 5 shows a state in which the inside of the water channel cover 30 is looked down from the upper front side.

  As shown in FIGS. 5 and 6, the water channel cover 30 includes a bottom wall 33a constituting the bottom surface side of the flow path, a side wall 33b rising upward from the bottom wall 33a in the outer peripheral portion 32b, and a bottom in the outer peripheral portion 32c. A side wall 33c rising upward from the wall 33a, and a side wall 33d that linearly connects the front end of the side wall 33b and the front end of the side wall 33c in the left-right direction are configured in a concave shape.

  Further, the corner portion connecting the outer peripheral portion 32b and the outer peripheral portion 32c is a position facing the washing water introduction port 14b (see FIG. 4), and has a substantially triangular bottom in plan view that is one step higher than the bottom wall 33a. A wall 33e is formed. Note that the bottom wall 33e may be formed at the same height as the bottom wall 33a without being formed to be higher by one step.

  On the bottom wall 33a, a plurality of guide protrusions 34a, 34b, 34c, 34d, 34e, 34f, 34g for discharging washing water from the entire discharge port 31 in a horizontal character shape (curtain shape), 34h and 34i are formed. Each of the guide protrusions 34a to 34i is formed so as to protrude upward from the bottom wall 33a in a mountain shape.

  Each of the guide protrusions 34a to 34c is formed in an elongated shape on the side close to the washing water introduction port 14b (see FIG. 4), and extends from the bottom wall 33e toward the discharge port 31 (see FIG. 4). Specifically, the guide protrusions 34b and 34c extend obliquely forward to the right from the bottom wall 33e, and then gradually change the direction forward to extend from the bottom wall 33e to the discharge port 31. Are curved. Further, the base ends of the guide protrusions 34 a to 34 c are arranged close to each other, and the distance between the adjacent guide protrusions 34 a to 34 c gradually increases toward the discharge port 31. Further, the guide protrusions 34 a to 34 c extend to the vicinity of the discharge port 31. These guide protrusions 34 a to 34 c have a function of guiding the wash water introduced from the wash water introduction port 14 b (see FIG. 4) toward one end side (left side) of the discharge port 31.

  Further, the side wall 33b has a wall surface 33b1 extending from the washing water introduction port 14b side toward the other end side (the other side), and a wall surface extending toward the one end side (one side) on the way to the discharge port 31. 33b2. The inflection point P (see FIG. 6) at which the wall surface 33b1 switches to the wall surface 33b2 is located on the other end side from the end portion 31a (one end, see FIG. 4) of the discharge port 31. By setting it as such a shape, it becomes possible to discharge wash water toward the one side (outside) from the edge part 31a of the discharge outlet 31. FIG.

  The guide projection 34d is formed to be separated from the right side of the guide projection 34c and extends from the side wall 33c toward the discharge port 31. The guide protrusion 34d is formed shorter than the guide protrusions 34a to 34c and is curved in the same direction as the guide protrusions 34a to 34c. Thereby, the washing water is guided toward the discharge port 31 on the front side of the guide protrusion 34d.

  The guide protrusion 34e is formed in contact with the guide protrusion 34c and extends substantially in the left-right direction. The guide protrusion 34e is formed along the side wall 33c and has a function of guiding the wash water introduced from the wash water inlet 14b (see FIG. 4) toward the other side (right side).

  The guide protrusion 34f is formed so as to be separated to the right of the guide protrusion 34d and extends from the side wall 33c toward the discharge port 31 (see FIG. 4). Further, the guide protrusion 34f is formed to be bent in the same direction as described above. Thereby, the washing water is guided toward the discharge port 31 on the front side of the guide protrusion 34f.

  The guide protrusion 34g is formed to be separated to the right of the guide protrusion 34f, and is formed in a substantially L shape in plan view. The guide protrusion 34g includes a protrusion 34g1 extending along the side wall 33c and a protrusion 34g2 extending toward the discharge port 31 side. The protrusion 34g1 guides the washing water toward the guide protrusion 34h, which will be described later, and the protrusion 34g2 guides it toward the discharge port 31.

  The guide protrusion 34h is formed to be separated to the right of the guide protrusion 34g and is formed in a substantially L shape in plan view. The guide protrusion 34h includes a protrusion 34h1 extending along the side wall 33c and a protrusion 34h2 extending toward the discharge port 31. The projection 34h1 guides the washing water to a guide projection 34i, which will be described later, and the projection 34h2 guides the washing water toward the discharge port 31.

  The guide protrusion 34i is formed adjacent to the right side of the guide protrusion 34h and extends from the side wall 33c toward the discharge port 31 side. The guide protrusion 34 i can prevent the washing water from being excessively introduced to the right end of the discharge port 31, and guides the wash water toward the discharge port 31 on the front side of the guide protrusion 34 i.

  FIG. 7 is a cross-sectional view taken along line AA in FIG. FIG. 7 shows a state in which the front side of each guide projection 34a to 34i is cut in the left-right direction (width direction) and viewed from the front side toward the rear side.

  As shown in FIG. 7, the guide protrusions 34a, 34b, 34c are formed with the highest height from the bottom wall 33a, and the guide protrusions 34d, 34f, 34g, 34h, 34i have a height from the bottom wall 33a. The guide protrusions 34a to 34c are formed lower than the guide protrusions 34a to 34c, and the guide protrusion 34i is formed to have the lowest height from the bottom wall 33a.

  Thus, the length L1 of the guide projections 34a to 34c on the side close to the washing water inlet 14b (see FIG. 4) is longer than the length L2 of the guide projections 34d, 34f, 34g, 34h, 34i on the far side. Further, the height H1 of the guide projections 34a to 34c near the washing water inlet 14b (see FIG. 4) is formed higher than the height H2 of the guide projections 34d, 34f, 34g, 34h on the far side. As a result, the washing water introduced from the washing water introduction port 14b can be discharged from the entire discharge port 31 at a uniform flow rate. That is, the lengths L1 and L2 of the guide protrusions 34a to 34i (excluding the guide protrusion 34e) function as a rectifying function, and the heights H1 and H2 function as a flow rate adjustment.

  8 is a cross-sectional view taken along the line B-B in FIG. 4, and FIG. 9 is a cross-sectional view taken along the line C-C in FIG. 4. In FIG. 8, the protrusion protruding upward from the bottom wall 33a indicates the cross section of the guide protrusion 34h.

  As shown in FIGS. 8 and 9, the water channel cover 30 is attached to the lower surface of the outer tub cover 14 in a watertight manner via a packing (not shown). In the present embodiment, the water channel cover 30 and the outer tub cover 14 constitute the circulating water channel 18 from the washing water introduction port 14 b to the discharge port 31. Further, the lower surface 14 e of the outer tub cover 14 to which the water channel cover 30 is attached has a flat surface 14 e 1 having the same height from the bottom wall 33 a of the water channel cover 30, and the flat surface 14 e 1 toward the discharge port 31 in the vicinity of the discharge port 31. And an inclined surface 14e2 inclined so as to descend.

  The water channel cover 30 has a discharge port 31 formed at the tip (the portion on the straight portion 14a1 side). The discharge port 31 is configured by forming a gap between the front end 33a2 of the bottom wall 33a and the side wall 33d. The side wall 33d has an inclined surface 33d1 extending obliquely rearward from the lower end. The lower end of the inclined surface 33d1 is located at substantially the same height as the surface of the bottom wall 33a. Further, the inclination of the inclined surface 33d1 is set to be an angle θ (see FIG. 8) on the front side with respect to the vertical direction (vertical direction). Moreover, it sets so that it may be located in the front side rather than the rotation center O1 (refer FIG. 10) of the inner tank 9 on the extension line of the inclined surface 33d1.

  Accordingly, even when the washing water is discharged from the discharge port 31, the washing water can be landed near the rotation center O of the inner tub 9 even if it is affected by gravity. Further, by setting the direction of the inclined surface 33d1 as described above, even when the amount of laundry put into the washing tub becomes just below the rating (see line H3 in FIG. 11A), The position of landing on the laundry can be brought close to the rotation center O1 of the inner tub 9, and the washing water can be sprayed over the entire laundry.

  The bottom wall 33a is an inclined surface 33a1 that is inclined from the side wall 33c side toward the discharge port 31 side. Thereby, the washing water of the bottom wall 33a of the water channel cover 30 can be flowed toward the discharge port 31, and it is possible to suppress the washing water from remaining on the bottom wall 33a of the water channel cover 30. Therefore, it can suppress that the dry clothes get wet with the remaining washing water. Further, by forming the guide protrusions 34a, 34b, 34c, 34d, 34f, 34g, 34h, 34i apart from each other, it is possible to suppress the washing water from remaining on the bottom wall 33a of the water channel cover 30, It can suppress that the dry clothing gets wet by the remaining washing water.

  Further, the discharge port 31 is formed in a slit shape along the left-right direction (the width direction of the washing machine 100). As shown in FIG. 4, the right end of the discharge port 31 is located on the right side of the right end of the wash water introduction port 14b, and the left end of the discharge port 31 is located on the left side of the left end of the wash water introduction port 14d. Yes. The width Wa (see FIG. 4) of the discharge port 31 is set on the inner side of the inner diameter of the fluid balancer 12, and is set to be not less than half (50% or more) of the maximum width Wmax of the laundry input port 14a. . Thereby, the washing water can be sprayed over the entire laundry without bringing the washing water into contact with the fluid balancer 12. In addition, when the width Wa is less than half of the maximum width Wmax (less than 50%), it becomes difficult to spray the wash water on the entire laundry in the inner tub 9. In the present embodiment, the width Wa is set to about 70% of the maximum width Wmax.

  FIG. 10 is a schematic diagram showing a shower shape. FIG. 10 is a plan view in which the inner tank 9 is accommodated in the outer tank 10 and an outer tank cover 14 (an inner lid is not shown) is attached to the opening of the outer tank 10. Further, the position of the discharge port 31 is shown by a thick solid line.

  As shown in FIG. 10, when the washing water Q (see the two-dot chain line) is discharged from the discharge port 31, it is sprayed in a film shape from the entire width direction of the discharge port 31. Further, the washing water Q discharged from the discharge port 31 is formed in a film shape with a width wider than the width Wa of the discharge port 31 toward the left and right outer sides than the left and right end portions 31a and 31b of the discharge port 31. Discharged. Actually, the washing water Q immediately after coming out of the discharge port 31 becomes wider than the width Wa, but after that, the width of the washing water Q is reduced, and the washing water Q becomes the bottom surface of the inner tub 9 (pulsation blade 11). At the position where the water lands on the water, the width is equal to the width Wa of the discharge port 31. As described above, when the washing water Q is discharged from the discharge port 31, the wash water Q is once larger than the width Wa of the discharge port 31, and then contracted, and finally arrives at a width equivalent to the width Wa of the discharge port 31. It comes to water.

  Fig.11 (a) is a sectional side view which shows the positional relationship of the laundry height and shower in this embodiment, (b) is a sectional side view which shows the positional relationship of the laundry height and shower in a comparative example. In addition, FIG.11 (b) is a figure which shows typically the case where washing water is sprinkled in cone shape.

  As shown in the comparative example of FIG. 11B, in the case where the outer tub cover 14 is provided with a water channel cover 200 that discharges washing water from the upper part of the inner tub 9 in a conical shape using centrifugal force. As shown by the height H20, in the case of a laundry (clothing) height at low load, the spraying area for the washing water can be secured sufficiently wide and the washing water is sprayed over the entire laundry. Can do. However, as shown by the height H10, in the case of the laundry height at a high load, the laundry hits before the washing water spreads, and the spraying area of the washing water on the laundry decreases, and the laundry You can only spray washing water on a part of the object. Thus, as the load amount increases, the spray area of the wash water decreases, which causes a decrease in cleaning power and occurrence of uneven washing.

  Therefore, in the present embodiment, as shown in FIG. 11A, the washing water (circulating water) Q is sprayed in a single horizontal shape. In this way, by spraying the washing water Q on one horizontal character (one character in the vertical direction on the paper), even if the laundry (clothing) height is low, as shown by the height H3, the height Even when the laundry (clothing) height is high when the load is high as indicated by H4, the washing water can be sprayed over the entire laundry without changing the spraying area of the washing water Q. In addition, when spraying the washing water Q, the washing water Q can be sprayed the whole laundry by rotating the pulsation blade board 11 and the inner tub 9. As described above, in this embodiment girder, even when the load amount (clothing height) increases, the spray area of the washing water on the laundry does not change, and washing unevenness is reduced and the cleaning power at high load is improved. Can be planned.

  Further, since the width Wa is widened and the opening area of the discharge port 31 is widened, it is not necessary to squeeze out the washing water (take out vigorously) as in the comparative example (see FIG. 11B). It becomes easier to discharge a large amount of washing water from the discharge port 31 than in the comparative example. In this embodiment, the pressure loss is reduced by thickening the circulation pipe 17 (also the path of the circulation pump 16) returning from the bottom of the inner tank 9 to the upper part of the outer tank cover 14 (inner diameter: 19 mm → 32.5 mm). The flow rate (23 L / min → 45 L / min) is increased without increasing the rotational speed of the motor of the circulation pump 16. Not only in the present embodiment, the circulation flow rate increases if the narrowest part of the cross-sectional area of the circulation flow path from the circulation pump 16 to the washing water inlet 14b is 500 mm2 (square millimeters) or more. Can be expected.

  Furthermore, in the present embodiment, the foreign matter trap provided on the upstream side of the circulation pump 16 is formed of a lattice-like filter part, so that it is less likely to be clogged than the case of a mesh-like filter part, and the water is circulated. The channel resistance can be reduced, which is effective for increasing the circulation flow rate. However, if the foreign matter trap is merely a lattice-like filter portion, the foreign matter collecting performance is deteriorated. Therefore, the lint filters 51b and 51b having a mesh-like filter portion are separately provided.

  When the rotary blade 11 is rotating, the lint filters 51b and 52b collect foreign substances via the circulation flow path members 51 and 52. For this reason, even when the circulation pump 16 is not driven and foreign matter cannot be collected by the foreign matter trap, foreign matter can be collected by the lint filter 51b, 52b by the rotation of the rotary blade 11, and the collection performance is improved. Further, it is not necessary to provide a mesh-like filter portion downstream of the circulation pump 16 and upstream of the discharge port 31, and it becomes easy to sprinkle a large amount of circulating water from the discharge port 31 vigorously.

  By the way, in a washing machine of a type without a circulation pump, water is lifted upward by centrifugal force due to rotation of a rotary blade and the like from the slit-like water spout provided on the downstream side of the circulation flow path member. The washing water is circulated. However, this type of washing machine is affected by the amount of laundry in the inner tub and the amount of washing water, and the amount of water sprayed decreases as more laundry is put into the inner tub. Can not be stably sprayed on objects. However, in this embodiment, since the wash water is circulated using the circulation pump 16, the amount of the wash water coming out from the discharge port 31 can be made almost constant.

  Further, in this embodiment, since it can be flattened as compared with the comparative example, the discharge port 31 can be disposed above the upper surface 12a of the fluid balancer 12 provided at the upper edge of the inner tub 9, and the laundry and the discharge A long distance from the outlet 31 can be secured (the water drop increases), and the cleaning power can be increased.

  In addition, although the slit-shaped water spout is not provided in the downstream of the circulation flow path members 51 and 52 of this embodiment, wash water is circulated in the inner tub 9 via the waste thread filters 51b and 52b. Can do. In particular, since the filter unit outlet facing the inner tank 9 is also present at a position lower than half the height of the inner tank 9, it is difficult for the circulation pump 16 sprayed from above the inner tank 9 to shower. Circulating water can be distributed to the laundry in the middle, that is, the laundry between the upper laundry and the lower laundry.

  FIG. 12 is a control block diagram of the washing machine according to the embodiment of the present invention.

  As shown in FIG. 12, the microcomputer (control device) 40 is connected to an operation button input circuit 41, a water level sensor 21, a temperature sensor 26, and a vibration sensor 27 that are connected to each operation button switch 6, so that the user can operate the buttons. Various information signals in the washing process and drying process are acquired. The microcomputer 40 is connected to the water supply electromagnetic valve 4, the clutch 13 b, the drain valve 15, the circulation pump 16, the electric motor 13 a, the blower fan 19, the heater 20, and the like via the drive circuit 42, and opening / closing, rotating, and energizing them. To control. Further, the microcomputer 40 is connected to a display unit 25 composed of a 7-segment light emitting diode, a display unit 7 composed of a light emitting diode, and a buzzer 43 for notifying the user of the operating state of the washing machine.

  FIG. 13 is a flowchart showing a part of the control process of the washing machine according to the embodiment of the present invention, and FIG. 14 is a flowchart showing another part of the control process of the washing machine according to the embodiment of the present invention. The microcomputer 40 is activated when the power switch 5 is pressed and the power is turned on, and executes a basic control processing program for washing and drying shown in FIGS. 13 and 14. When the washing course is set, a washing operation, a rinsing operation, and a final dehydration operation are performed.

  As shown in FIG. 13, in step S <b> 101, the microcomputer 40 performs state confirmation and initial setting of the washing machine 100.

  In step S <b> 102, the microcomputer 40 lights up the indicators 7 and 25 (see FIG. 12) of the operation panel 8 (see FIG. 1) and sets a washing course according to an input instruction from the operation button switch 6. When there is no input instruction, the standard washing course or the previous washing course is automatically set.

  In step S <b> 103, the microcomputer 40 monitors input of a start switch signal from a start switch (operation button switch) in the operation button switch 6 of the operation panel 8. If the microcomputer 40 determines that there is no input of the start switch signal, it repeats the process of step S103, and if it determines that there is an input of the start switch signal, it proceeds to step S104.

  In step S104, the microcomputer 40 executes a detergent amount detection process. This detergent amount detection processing is performed when the pulsating blade 11 is rotated in one direction while the inner tub 9 is stationary in a dry cloth state before the washing water is supplied. This is done by detecting the amount of laundry cloth based on the amount of rotational load that acts. The microcomputer 40 controls the electric motor 13a and the clutch 13b, and obtains an appropriate amount of detergent (detergent amount) based on the detected cloth amount. The detergent amount is determined by referring to a preset table of cloth amount and detergent amount.

  Specifically, the detection of the amount of cloth using an inverter-driven motor as the motor 13a is performed by detecting the ultimate rotational speed when power is supplied for a predetermined time so as to rotate the motor 13a. The detection of the amount of cloth using a capacitor phase-separated single-phase induction motor as the electric motor 13a is performed by detecting the inertial rotational deceleration characteristic after the electric power is cut off in a state where the electric motor 13a is powered up to the saturation rotational speed. And a preferable detergent amount is calculated | required by referring the contrast table of the cloth amount and detergent amount which were preset.

  In addition, the amount of washing water is set so that the water level does not exceed the pulsating blade 11 while the amount of cloth is within a predetermined range of cloth amount (appropriate amount) and the water level is accumulated at the bottom of the outer tub 10. To do.

  Further, the microcomputer 40 obtains and sets the washing time based on the detection result (cloth amount). When the amount of cloth is not detected, a standard washing time is set.

  In step S <b> 105, the microcomputer 40 displays the obtained detergent amount on the display unit 25 of the operation panel 8.

  In step S106, the microcomputer 40 opens the detergent water supply solenoid valve (not shown), and executes detergent water supply to the detergent charging chamber of the detergent / finishing agent container 28 (see FIG. 1). The user closes the outer lid 3 (see FIG. 1) after putting the indicated amount of the detergent into the detergent charging chamber of the detergent / finishing agent container 28 (see FIG. 1) before supplying the detergent. To operate. The powder detergent put into the detergent charging chamber through which the detergent feed water flows flows together with the detergent feed water through the detergent / finishing agent container 28 and falls to the bottom of the outer tub 10.

  In step S107, the microcomputer 40 stops the detergent water supply after supplying the detergent to the melted water level. In this embodiment, the detergent water supply amount is set to about 10 liters, for example, regardless of the washing amount (cloth amount). This amount of water is sufficient to agitate the water supplied at the bottom of the inner tank 9 and the detergent when the inner tank 9 is rotated in the subsequent detergent dissolution (step S108), and the water surface pulsates. It is set to be lower than the height of the lower surface of the blade 11 (the laundry does not get wet before the detergent is dissolved).

  In step S <b> 108, the microcomputer 40 integrally rotates the inner tank 9 and the pulsating blade 11 in one direction at a slow speed (for example, about 70 rotations per minute), so that the outer tank 10 on the bottom surface of the inner tank 9. Detergent dissolving is performed by stirring the detergent-dissolved water and the powder detergent supplied to the bottom to produce wash water with a high detergent concentration. The time for dissolving the detergent is set to 1 minute, for example. The dissolution rate is about 90% even under conditions of low temperature (low water temperature) and difficult to dissolve powder detergent. The detergent concentration of the produced wash water is about 7 times the standard concentration. Here, the standard concentration is a ratio of 20 grams of powder detergent / 30 liters of washing water.

  In step S109, the microcomputer 40 executes pre-washing. In this pre-washing, the inner tank 9 is kept stationary and the pulsating blade 11 is intermittently agitated to rotate forward and backward, and the circulation pump 16 is operated while the pulsating blade 11 rotates in the forward and reverse directions. The washing water (washing water) at the bottom of 10 is pumped up by the circulation pipe 17, and the washing water is introduced into the water channel cover 30 from the washing water inlet 14 b formed in the outer tub cover 14. Then, the washing water is sprayed horizontally on the laundry from the discharge port 31 formed in the water channel cover 30. Thus, since the washing water is sprayed from the discharge port 31 while the inner tub 9 is rotating forward and backward, the washing water can be sprayed over the entire laundry (clothing). Further, the microcomputer 40 opens the detergent water supply electromagnetic valve (not shown) and the washing water supply electromagnetic valve (not shown) while referring to the detection signal of the water level sensor 21 while the pulsation blade plate 11 and the circulation pump 16 are stopped, and the water level. Make up water so that does not exceed the set water level (h1). By repeating this operation a plurality of times, the laundry is adapted to the washing water (washing water) and dispersed on the pulsating blade 11.

  During the first forward / reverse rotation, washing water having a detergent concentration of about 7 times falls on the laundry and penetrates into the laundry. The high-concentration washing water is discharged from the discharge port 31 (see FIG. 4) of the water channel cover 30 and is evenly distributed over the entire laundry. For this reason, it penetrates into the laundry evenly by the penetration action of the detergent. The high-concentration washing water that has permeated the laundry has a high oil-dissolving ability, has a great effect of dissolving fat and oil stains and floating the stain from the laundry, and provides a high detergency.

  Moreover, the detergent concentration of the washing water sprayed on the laundry decreases by repeating the makeup water, and the detergent concentration becomes about twice the standard concentration at the end of the pre-washing.

  In step S110, the microcomputer 40 performs main washing. In the main washing, first, the cloth amount detection is executed by the same method as described above to correct the set washing time. Thereafter, the circulating pump 16 was operated while rotating the pulsating blade 11 with the inner tub 9 stationary, and the washing water (wash water) collected at the bottom of the outer tub 10 was formed in the water channel cover 30. Circulation of washing water sprayed from the discharge port 31 to the laundry for about 1 minute, and rotation of the pulsating blade 11 with the circulation pump 16 stopped to stop the washing water (washing water) circulation Repeat the cloth loosening and stirring for about 1 minute.

  By the way, in the case where the washing water is sprayed on the laundry vigorously as in the prior art, water splashes on the surface of the laundry, making it difficult for the washing water to penetrate into the laundry, and the inner lid of the outer tub cover 14 There was a problem of getting dirty. However, in this embodiment, a large flow rate can be ensured by widening the opening of the discharge port 31 without having to wash out the washing water. For this reason, since it can spray without spraying washing water on a laundry, it becomes easy to infiltrate washing water into a laundry. Furthermore, since there is an effect of eliminating the foam of the detergent generated in the inner tank 9 during the main washing, it is possible to suppress unnecessary foaming. For this reason, it is possible to prevent a reduction in cleaning power due to the cushioning action of the detergent foam. Furthermore, the drainage after the main washing can be performed smoothly and the foaming phenomenon at the time of dehydration can be prevented.

  In step S110, the microcomputer 40 performs uniform stirring for about 1 minute to rotate the pulsating blade 11 forward and backward with the operation of the circulation pump 16 stopped and the circulation of the washing (washing water) stopped. After that, the main washing is finished.

  As shown in FIG. 14, in step S111, the microcomputer 40 executes a rotary shower rinsing in the first rinsing process. In the first rinsing step, first, the drain valve 15 is opened to drain the washing water (washing water) collected at the bottom of the outer tub 10, and then the inner tub 9 and the pulsating blade 11 are integrated together. Rotate in the direction to centrifugally dehydrate the wash water contained in the laundry. The rotational speeds of the inner tank 9 and the pulsating blade 11 at the time of centrifugal dewatering are set to the same rotational speed as the rotational speed (about 1000 rpm) in the final dewatering described later. Thereby, the dehydration operation which implement | achieves a high dehydration rate is performed.

  The microcomputer 40 opens the washing water supply electromagnetic valve (not shown) while slowly rotating the inner tub 9 and the pulsating blade 11 in one direction (35 to 40 rpm) while keeping the drain valve 15 open. Then, tap water (fresh water) is supplied to the laundry on the pulsating blade 11 through the sprinkling port 14f (rotating shower rinsing). During the rotary shower rinsing, since the circulation pump 16 is not driven, the foreign matter is not collected by the foreign matter trap, and the pulsating blade 11 is also rotated integrally with the inner tank 9 and the water. Since scooping is not performed, lint is not collected by the lint filters 51b and 52b.

  In step S112, the microcomputer 40 executes the reservoir rinsing in the second rinsing process. In the second rinsing step, after the drain valve 15 is closed, the inner tub 9 and the pulsating blade 11 are integrally rotated slowly in one direction (35 to 40 rpm) while washing the water supply solenoid valve (not shown). ) And water is supplied so that tap water (fresh water) is sprayed from the sprinkling port 14f to the laundry on the pulsating blade board 11.

  When tap water accumulates at the bottom of the outer tub 10, the circulation pump 16 is driven to spray water from the discharge port 31. Thereafter, not only the washing water supply solenoid valve but also the softening agent water supply solenoid valve (not shown) is opened and water is supplied to the softening agent input chamber of the detergent / finishing agent container 28 (see FIG. 1), whereby the softening finish agent is supplied. The softening agent in the charging chamber is introduced into the bottom of the outer tub 10. Here, when the washing water supply electromagnetic valve and the softening agent water supply electromagnetic valve are opened, the rotation speed of the motor of the circulation pump 16 is reduced so that the current value does not exceed the upper limit of the commercial power supply. Therefore, the circulation flow rate at this time is smaller than that in the main washing. However, since the washing water (rinse water) that comes out from the discharge port 31 of the water channel cover 30 does not reach the main washing, it is sprayed evenly on the laundry, so that the detergent components contained in the laundry can be diluted efficiently. , Rinsing performance can be increased. At this time, in the foreign matter trap, foreign matter is also collected at the same time.

  Next, the microcomputer 40 agitates the accumulated rinse water while rotating the pulsation blade plate 11 forward and backward at about 120 rpm while the inner tank 9 is stationary. At this time, since the circulation pump 16 is not driven, the foreign matter is not collected by the foreign matter trap, but the waste yarn is collected by the waste yarn filters 51b and 52b.

  In step S113, the microcomputer 40 performs final dehydration. In the final dehydration, the inner tank 9 and the pulsation blade board 11 are integrated with the drain valve 15 opened, and the laundry dehydration drive device is operated so as to rotate at a high speed of about 1000 rpm in one direction. The laundry is dewatered by centrifugation. The operation time for the final dehydration is set to a time for obtaining a desired dehydration rate.

  In step S114, the microcomputer 40 determines whether or not a washing / drying course is set. If the microcomputer 40 determines that the washing / drying course is not set (S114, N), it skips step S115 and ends the process, and if it determines that the washing / drying course is set ( S114, Y), the process proceeds to step S115.

  In step S115, the microcomputer 40 performs drying when the washing / drying course is set. In this drying, the air blower provided in the middle of the drying duct (not shown) while rotating the pulsating blade board 11 in the forward and reverse directions while the inner tub 9 is stationary with the drain valve 15 opened, as in the washing process. The fan 19 (see FIG. 12) is operated. Thereby, the air in the outer tub 10 is sucked into the drying duct (not shown) from the water flow vent 10b (see FIG. 2), and the dehumidifying mechanism installed in the drying duct when passing through the drying duct. The water is cooled and dehumidified by touching the cooling water flowing down from it. The cooled and dehumidified air collects lint through a lint filter and is heated by the heater 20 and then blown into the inner tank 9 from the hot air inlet 14c (see FIG. 4).

  Then, the microcomputer 40 performs the drying while monitoring the temperature of the hot air by the temperature sensor 26 (see FIG. 12), and terminates the drying when the temperature change rate reaches a predetermined value.

  Here, the relationship between the flow rate (circulation flow rate) of the circulation pump 16 and the cleaning performance will be described with reference to FIG. FIG. 16 is a graph showing the relationship between the circulation flow rate and the cleaning ratio. Incidentally, the washing ratio is the ratio between the washing degree of the test washing machine and the washing degree of the standard washing machine, and is specified in the Japanese Industrial Standard “Performance Measurement Method for Home Electric Washing Machine (JISC9811)”. That is, the higher the cleaning ratio, the higher the cleaning performance.

  The solid line in FIG. 16 is a graph showing the relationship between the circulation flow rate and the washing ratio in the vertical washing machine 100 according to this embodiment, and the broken line in FIG. 16 is the relationship between the circulation flow rate and the washing ratio in the drum type washing machine. It is a graph which shows a relationship. As shown in FIG. 16, the cleaning ratio (cleaning performance) improves as the circulating flow rate increases, and the cleaning ratio becomes saturated when the circulating flow rate exceeds a certain level. Specifically, if the circulation flow rate is increased to 30 L / min or more, a higher cleaning ratio (cleaning performance) than a conventional general washing machine (cleaning ratio = 1.10) can be obtained.

  Here, in the case of a drum type washing machine, a circulation flow rate of 36 L / min or more is required to obtain an equivalent cleaning ratio. That is, the vertical washing machine can obtain the same washing ratio even if the circulating water amount is lower than that of the drum type washing machine. One reason for this is that in the case of a vertical washing machine, washing can be performed while the laundry is moved by forward and reverse rotation of the rotary blade 11. As another reason, in the case of a vertical washing machine, the laundry in the lower part of the inner tub 9 is immersed in water, and the entire laundry in the inner tub 9 can be easily hydrated without increasing the flow rate. It is possible.

  In addition, as shown in FIG. 16, in the case of a vertical washing machine, the cleaning ratio is saturated when it exceeds 50 L / min. Therefore, the circulation flow rate may be 30 L / min or more and 50 L / min or less. This not only suppresses power consumption in the motor that drives the circulation pump 16, but also reduces the amount of water stored upstream of the circulation pump 16, thereby minimizing structural changes such as channel expansion. it can. However, in order to exceed the higher cleaning ratio of 1.15, it is desirable to set the circulation flow rate to 40 L / min or more.

  Next, the drive timing of the circulation pump 16 in the main washing process will be described in detail with reference to FIG.

  First, in the main wash 1, replenishing water is performed, and water is not sufficiently accumulated in the outer tub 10, so the circulation pump 16 is driven at a lower rotational speed. In the next main wash 2, in order to moisten a large amount of laundry at an early stage, the motor of the circulation pump 16 is driven at a higher rotational speed (for example, 2800 rpm) than other main wash to increase the circulation flow rate ( For example, 48 L / min). As the circulating water is supplied to the laundry, the water accumulated in the outer tub 10 decreases, so that the circulating flow rate does not increase even if the rotational speed of the motor of the circulation pump 16 is increased. Further, when the rotation speed of the motor of the circulation pump 16 is increased, the noise tends to increase. Therefore, in the main washings 3 to 6, the rotation speed is decreased (for example, 2400 rpm).

  In addition, since the shower with a large flow rate by the circulation pump 16 in this embodiment is spread over a wide range in a belt shape, the washing speed can be changed without changing the shape of the shower by changing the rotation speed of the motor of the circulation pump 16. Water can be sprayed evenly on things. Accordingly, in the main washing process and the two rinsing processes of the present embodiment, the rotation speed of the motor of the circulation pump 16 is kept constant, and the occurrence of a beeping sound is suppressed. Here, the state where the rotational speed of the motor of the circulation pump 16 is constant means that the rotational speed in the same process such as the main washing 1 is always within the range of ± 10% of the average rotational speed in the process. It shall refer to the state of being. In the main washing 1 to the main washing 6, the pulsation blade 11 is rotated forward and backward at a rotational speed of about 120 rpm while the inner tub 9 is stationary, so that the lint is collected by the lint filters 51b and 52b. The

  As described above, according to the washing machine 100 of the present embodiment, the discharge port 31 for returning the washing water into the inner tub 9 is located inside the position of the fluid balancer 12 (see FIG. 2), and By making the width more than half of the maximum width Wmax of the laundry input port 14a for supplying the laundry into the inner tub 9 (see FIG. 4), the horizontal single-letter-shaped washing water can be sprayed from the discharge port 31 wide. The washing water (washing water) at the time of washing and the rinsing water (washing water) at the time of rinsing can be sprayed over the entire laundry. As a result, the washing water can be evenly sprayed on the laundry, so that the washing unevenness can be reduced and the cleaning power can be increased.

  Further, in the present embodiment, the discharge port 31 is located on the rear side of the rotation center O1 (see FIG. 10) of the rotary vane 11, and the wash water discharged from the discharge port 31 is at the top of the laundry input port 14a. Because it falls to the front side of the rotation center O1 with a width of more than half of Wmax, the washing water falls to the rotation center of the inner tub 9 regardless of the amount of load (the height of the laundry). Washing water can be sprayed over the entire laundry (clothing).

  In the present embodiment, the length of the guide protrusions 34a, 34b, 34c, 34d, 34f, 34g, 34h, 34i close to the washing water inlet 14b (projections 34a, 34b, 34c) is introduced into the washing water. Since it is longer than the length of the side (projections 34d, 34f, 34g, 34h, 34i) far from the mouth 14b, the washing water introduced from the washing water introduction port 14b is close to the washing water introduction port 14b of the discharge port 31. Can be guided to the side (rectification function). Moreover, the height from the bottom wall 33a on the side close to the washing water introduction port 14b (projections 34a, 34b, 34c) is on the side farther from the washing water introduction port 14b (projections 34d, 34f, 34g, 34h, 34i). Since the height is higher than the height from the bottom wall 33a, the flow rate on the side of the discharge port 31 close to the washing water introduction port 14b can be sufficiently secured (flow rate adjusting function). Thereby, washing water can be discharged from the full width of the discharge port 31, and it becomes possible to scatter the washing water in the shape of a horizontal letter on the laundry.

  In the present embodiment, the washing water inlet 14b is located at one end (left side in the drawing) of the water channel cover 30 in the width direction (left and right direction) and extends to the other side in the side wall 33b of the water channel cover 30. After that, it is formed in a curved shape by extending to one side in the middle (see FIGS. 8 and 9). As a result, the wash water can be discharged from the end 31a to the outside at the end 31a (see FIG. 4) on one side of the discharge port 31 (left side in FIG. 6). In addition, about the edge part of the other side (right side of FIG. 6) of the discharge port 31, since wash water flows in from the left side (one side), the edge part 31b (FIG. 6) of the other side (right side of FIG. 6). 4), washing water can be discharged from the end 31b to the outside. As described above, the washing water is discharged outward from the left and right end portions 31a and 31b (see FIG. 4) of the discharge port 31, so that the laundry can be landed on the laundry with substantially the same width as the discharge port 31. It becomes possible. Therefore, it becomes possible to spread the washing water evenly over the entire laundry.

  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 variously. In the above-described embodiment, the water channel cover 30 provided with the washing water inlet 14b at the left end (one end side in the width direction) has been described as an example. However, the embodiment is not limited to the left end, and is wide (maximum width). As long as the discharge port 31 can be formed (half or more of Wmax), it may be the right end (the other end in the width direction) or the center (the middle in the width direction). In the case of a right end, it can comprise by making it into a right-and-left reverse shape with this embodiment, and in the case of a center, it can comprise by making it into a left-right symmetric shape on the basis of the center of the waterway cover 30.

  Further, in the present embodiment, the case where the continuous discharge ports 31 are formed in the width direction (left-right direction) has been described as an example, but the discharge port 31 may be configured to be divided in the width direction. Good. Note that the number of divisions is not limited to two and may be divided into three or more.

  In the present embodiment, the case where the discharge port 31 is formed linearly in the width direction (left-right direction) has been described as an example. However, the discharge port 31 may have a bow shape, It may be a mold shape. Further, in the present embodiment, as illustrated in FIG. 4, the example in which one discharge port 31 is formed in the straight portion 14a1 of the laundry input port 14a has been described, but the straight portion 14a2 and the arc portions 14a3 and 14a4 are provided. The discharge port 31 may be formed.

1 Housing 9 Inner tank 10 Outer tank 11 Pulsating blade (rotary blade)
12 Fluid balancer 14 Outer tank cover 14a Laundry input port (input port)
14b Washing water introduction port (introduction port)
16 Circulation pump 17 Circulation pipe (circulation path)
18 Circulating water channel 30 Water channel cover 31 Discharge port (return port)
100 Washing machine O Rotation center Wmax Maximum width

Claims (5)

An outer tank,
An inner tub rotatably supported in the outer tub;
A rotating blade provided rotatably at the bottom of the inner tank;
In the washing machine comprising: a circulation pump that draws up the washing water stored in the bottom of the outer tub and circulates by returning the washing water into the inner tub.
A washing machine characterized in that the circulation pump is driven to set the circulation flow rate to 30 L / min or more.   The washing machine according to claim 1, wherein the return port for returning the washing water into the inner tub has a width that is at least half of the maximum width of the insertion port for putting the laundry into the inner tub.   The washing machine according to claim 1 or 2, wherein a rotation speed of a motor of the circulation pump is constant when the circulation flow rate is 30 L / min or more. A foreign matter trap on the upstream side of the circulation pump;
The washing machine according to any one of claims 1 to 3, wherein the foreign matter trap is formed of a lattice-shaped filter portion.   The washing machine according to any one of claims 1 to 4, wherein the circulation flow rate is 40 L / min or more and 50 L / min or less.