JP6431684B2 - Electric washing machine - Google Patents

Description

  The present invention relates to an electric washing machine.

  An electric washing machine in which a washing tub is placed vertically is provided with a rotating blade at the bottom of the washing tub, and washing is performed by rotating the rotating blade forward and backward. The rotor blade has a disk shape and includes a plurality of convex ribs formed radially from the center thereof. Moreover, the following patent document 1 discloses a valley and an inclined portion in which a gentle inclined surface is formed which causes an upward component force to act on the laundry by rotating with respect to the shape of the rotary blade. .

JP2013-236682A

  In the above-described conventional electric washing machine, the valley portion and the inclined portion formed on the rotary vane are smoothly and continuously connected with a gentle inclined surface. Therefore, the laundry on the rotating rotor blades is slippery, the laundry on the top remains on the top and the laundry on the bottom remains on the bottom, which may result in uneven washing. .

  An object of the present invention is to solve such a problem, and to provide an electric washing machine in which the upper and lower exchanges of the laundry are promoted and the washing power can be improved by suppressing washing unevenness.

The present invention includes a washing tub, a rotating blade provided at the bottom of the washing tub, an outer tub that contains the washing tub and stores washing water, and a drive that rotationally drives the washing tub and the rotating wing blade. In the electric washing machine provided with a mechanism, the upper surface of the rotary blade includes a bottom portion that is relatively lower than other regions, a valley-like inclined surface that continuously rises on both sides in the circumferential direction of the bottom portion, The valley-shaped inclined surface immediately before reaching the boundary with the mountain-shaped inclined surface, which includes a mountain-shaped inclined surface that includes a relatively high ridge line portion as compared with the region and continuously falls on both sides in the circumferential direction of the ridge line portion. The angle of inclination of the mountain-shaped inclined surface immediately after passing the boundary with respect to the angle of inclination of the inclination angle decreases discontinuously at the boundary , and the valley-shaped inclined surface and the mountain-shaped inclined surface Forms a raised shape at the boundary between

  According to the present invention, it is possible to provide an electric washing machine that promotes the interchange of the upper and lower sides of the laundry and can improve the cleaning power by suppressing unevenness in washing.

It is a general-view figure which shows the electric washing machine of Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows schematic structure of the electric washing machine of Embodiment 1. It is a perspective view of the rotary blade in the electric washing machine of Embodiment 1. FIG. 3 is a plan view of a rotary blade in the electric washing machine according to Embodiment 1. FIG. It is the schematic which shows the boundary vicinity of the protruding part and trough part in the rotary blade shown in FIG. It is IV-IV sectional drawing of the rotary blade shown in FIG. It is VV sectional drawing of the rotary blade shown in FIG. It is a block diagram of the control system of the electric washing machine shown in FIG. It is a flowchart which shows a part of control process which the microcomputer in the controller of the control system shown in FIG. 8 performs. It is a flowchart which shows a part of other control processing which the microcomputer in the controller of the control system shown in FIG. 8 performs. It is a longitudinal cross-sectional view which shows schematic structure of the electric washing machine of Embodiment 2 of this invention. It is a perspective view which shows the shape of the lower surface side of the rotary blade of Embodiment 2. FIG.

Embodiments of the present invention will be described below with reference to the drawings.
<Embodiment 1>
The electric washing machine in this embodiment is a form for executing washing and drying, and basically has a configuration for executing washing and drying as follows.

  A washing / dehydrating tub as an inner tub is rotatably installed in an outer tub for storing washing water, and a rotary vane is rotatably installed at the center of the bottom of the washing / dehydrating tub. The rotary blade is provided with a plurality of raised portions formed by gentle inclined surfaces that repeatedly apply an upward component force to the laundry put on the rotary blade by rotating. The washing and dewatering tub and the rotary vane are configured to be selectively rotated by a drive mechanism.

  Further, a detergent feeder and a detergent water supply mechanism for introducing powder detergent in the detergent feeder into the bottom of the outer tub, a water supply mechanism for supplying washing water into the outer tub, and a drainage mechanism for draining the washing water in the outer tub A washing water circulation mechanism that circulates the washing water at the bottom of the outer tub so as to fall into the washing and dehydration tub from above the washing and dehydration tub; An air circulation dehumidifying mechanism that circulates in the dewatering tank and dries the laundry, and a control device that controls the drive mechanism, the water supply mechanism, the drainage mechanism, the washing water circulation mechanism, and the air circulation dehumidification mechanism are provided.

The control device controls the washing and drying process as follows.
In the washing process, in the subsequent washing process, the water level that does not exceed or slightly exceeds the upper surface of the rotary blade is maintained, and water is supplied so that it accumulates at the bottom of the outer tub, thereby dissolving the powder detergent and increasing the level at the bottom of the outer tub. Washing water is generated by generating washing water having a detergent concentration and rotating the rotating blades forward and backward while circulating the washing water so as to fall on the laundry, and repeatedly applying an upward force to the laundry. Here, the washing water when the amount of laundry is within the normal range should be a level that does not exceed the upper surface of the rotary blade, and the washing water when the amount of laundry is below the normal range is slightly or slightly. The water level is exceeded.

  In the rinsing process, as in the washing process, the water level that does not exceed or slightly exceeds the upper surface of the rotary blade is maintained, and the rinsing water supplied so as to accumulate at the bottom of the outer tub is circulated so as to fall on the laundry. While the rotary blade is rotated forward and backward, an upward force is repeatedly applied to the laundry, thereby rinsing the washing water (detergent component) contained in the laundry.

  Then, in the drying process, the air in the outer tub is sucked out while rotating the rotating blades forward and backward, water-cooled and dehumidified, and then heated and circulated so as to blow into the washing and dewatering tub to dry the laundry.

  FIG. 1 is an external view of an electric washing machine 100 that performs such washing and drying, and FIG. 2 is a longitudinal sectional view showing an internal structure.

  Reference numeral 1 denotes a rectangular cylindrical outer frame constituting the outer shell. Reference numeral 2 denotes a top cover attached to the upper part of the outer frame 1. A laundry input port 2a is provided on the front side of the top cover 2. 3 is an outer lid 3 attached so as to cover the laundry input port 2a of the top cover 2. When the handle 3a is pulled upward, the outer lid 3 is bent and opened at the center as shown by a two-dot chain line in FIG. An operation panel 8 having various operation button switches 6 and 6 a and indicators 7 and 25 is provided on the front side of the outer lid 3. The operation panel 8 is electrically connected to a control device 14 provided at the bottom of the machine body. Reference numeral 5 denotes a power switch provided on the front surface of the top cover 2. Parts related to water supply and drying such as a water supply electromagnetic valve 4, a heater 20, and a blower fan 19 are incorporated in the rear part of the top cover 2, and a detergent / finishing agent container 28 is incorporated in the front side of the top cover 2.

9 is a washing and dewatering tub, which has a large number of small through holes 9a for water flow and ventilation on its outer peripheral wall, and a plurality of through holes 9b for water flow and ventilation on its bottom wall, A fluid balancer 9c is provided at the upper edge, and a rotary vane 11 is rotatably installed inside the bottom.
Details of the rotary blade 11 will be described later.

  Reference numeral 10 denotes an outer tub containing a washing / dehydrating tub, and a washing / dehydrating drive device is attached to the outside of the bottom of the tub. The outer tub 10 has four orientations of the outer tub 10 via buffering devices (not shown) on four support rods that are suspended by hanging from corner plates provided at the four corners of the upper end of the outer frame 1. Is suspended from the center of the outer frame 1 by engaging them uniformly. The washing / dehydrating drive device includes a washing / dehydrating drive motor 13 using an inverter-driven motor or a reversible rotation type capacitor phase-separated single-phase induction motor, an electromagnetic operation clutch mechanism 12, and a planetary gear speed reduction mechanism. By controlling the electromagnetic operation clutch mechanism 12, a washing drive mode in which the rotating blade 11 is repeatedly rotated forward and backward in a state where the washing and dewatering tub 9 is locked so as to be stationary or released so that it can freely rotate, and washing It has a drive function for selectively executing a dehydration drive mode in which the cum dewatering tank 9 and the rotary blade 11 are integrally rotated in the same direction.

  A vibration sensor 27 is installed outside the side surface of the outer tub 10 and detects vibrations of the outer tub 10 during washing or during dehydration in which the washing and dewatering tub 9 rotates at high speed.

  Reference numeral 31 denotes a tank cover provided on the upper surface of the outer tank 10. About 2/3 from the front side of the tank cover 31 has a laundry input port 31a, and a rear surface 31b has a hot air outlet (not shown) communicating the upper and lower surfaces of the tank cover 31, and a water supply inlet ( A circulating water inlet 33 is provided. Further, a detergent / softening agent inlet 28 a is provided in front of the tank cover 31. Reference numeral 23 denotes an inner lid provided so as to cover the laundry input port 31a. The inner lid 23 is attached so as to be freely opened and closed by a hinge 23b. When the handle 23a is lifted upward, the inner lid 23 is unlocked (not shown) and opened as indicated by a one-dot chain line in the figure. It is locked by pushing down. Reference numeral 30 denotes a circulating water cover provided on the lower surface of the rear surface 31b of the tank cover 31 (on the washing and dewatering tank 9 side).

  Reference numeral 22 denotes a drying duct that connects the dry water passage vent 10b and the hot air outlet. In the middle of the drying duct 22, a blower fan 19, a heater 20, a lint filter (not shown), a dehumidifying mechanism 22b, and a temperature sensor 26 are provided. When the blower fan 19 is operated and the heater 20 is energized, warm air blows into the washing and dewatering tub 9, warming the laundry and evaporating moisture. The air that has become hot and humid passes through the through holes 9a and 9b, exits the outer tub 10, is sucked into the drying duct 22 through the water vent 10b, and is cooled and dehumidified with cooling water flowing down the dehumidifying mechanism 22b and dried. It becomes low-temperature air, is heated again by the heater 20, and circulates so as to blow into the washing and dewatering tub 9.

  29a, 29b, 29c, 29d, 29e, and 29f are rubber bellows tubes, and the drying duct 22 provided on the outer tank 10 and the outer tank cover 31 that are subject to vibration displacement and the fixed side (the outer frame 1, the top cover 2, and the like). It is used for connection with the water supply electromagnetic valve 4 and the circulation pump 16.

  In this embodiment, the water supply electromagnetic valve 4 uses a four-way valve so that water can be supplied in four directions. The first is a washing water supply solenoid valve, which is connected to the water supply inlet and supplies water into the washing and dewatering tub 9. The second is a detergent water supply solenoid valve, which is connected to the detergent charging chamber of the detergent / finishing agent container 28. The third is a finishing water supply solenoid valve, which is connected to the finishing agent charging chamber of the detergent / finishing agent container 28. The detergent / finishing agent container 28 is connected to the detergent / finishing agent inlet 28 a, and the detergent and the finishing agent are supplied into the outer tub 10. The fourth is connected to a dehumidifying mechanism 22b described later.

  An air trap 21 a is provided on the bottom surface of the outer tub 10, and the internal pressure is transmitted to the water level sensor 21 via the tube 21 b to detect the water level of the washing water in the outer tub 9.

  Reference numeral 17 denotes a wash water circulation pipe that connects between the water flow vent 10 b provided at the bottom of the outer tub and the circulation water inlet 33. In the middle of the circulation pipe 17, there are a circulation pump 16 and a foreign matter trap 18 provided at the bottom of the machine body. A drainage hose 24 is connected to the foreign matter trap 18 via a drainage valve 15.

  When the circulation pump 16 is operated, the wash water in the outer tub 10 is carried from the water vent 10 b provided at the bottom of the outer tub to the upper portion of the outer tub 10 through the circulation pipe 17, and the circulated water inlet 33 of the tub cover 31. Enters the circulating water cover 30, the yarn waste is removed by the yarn waste filter 38, and water is sprinkled from the nozzle 34 into the washing and dewatering tub 9.

  Details of the rotary blade 11 are shown in FIGS. 3 is a perspective view of the rotary blade 11, FIG. 4 is a plan view (top view) of the rotary blade 11, FIG. 5 is a schematic diagram showing the vicinity of the boundary between the raised portion and the valley, and FIG. 7 is a cross-sectional view of the rotary blade 11 taken along the center line IV-IV, and FIG. 7 is a cross-sectional view of the rotary blade 11 taken along the upper and lower center lines VV of FIG.

The upper surface of the rotary blade 11 includes a plurality of raised portions 11a and valleys 11b formed between the raised portions 11a. In the present embodiment, there are provided two raised portions 11a formed across the rotation center P of the rotary blade 11 and two valley portions 11b formed between the raised portions 11a. In the rotary blade 11, the first inclined surface 11 g that forms the raised portion 11 a and the second inclined surface 11 h that forms the valley portion 11 b are connected discontinuously. Specifically, when the rotary blade 11 in the present embodiment is shifted from the second inclined surface 11h to the first inclined surface 11g, the inclination angle is rapidly reduced. In this manner, by providing the inclined sudden reduction portion on the upper surface of the rotary blade 11, the boundary portion between the second inclined surface 11h and the first inclined surface 11g is raised and swollen (see FIG. 5). In this portion, an upward force is applied to the laundry, and the replacement of the laundry that overlaps the top and bottom is promoted.

  As shown in FIG. 4, in the first inclined surface 11g, the circumferential region gradually expands from the inner diameter side close to the rotation center P toward the outer diameter side, and the circumferential region becomes maximum on the outer diameter end surface 11f. . In addition, the first inclined surface 11g includes a ridge line 11a1 that is relatively higher than the other regions, and forms a mountain-shaped convex curved surface that continuously falls on both sides in the circumferential direction. On the other hand, the second inclined surface 11h includes a valley bottom 11b1 that is relatively lower than other regions, and forms a valley-like concave curved surface that continuously rises on both sides in the circumferential direction. The concave curved surface has a so-called bowl shape in which the central portion in the radial direction is low (deep) and the inner diameter side portion and the outer diameter side portion are high (shallow). In addition, when viewed from above, the rotary blade 11 has a pair of elliptical valley portions 11b positioned symmetrically and a pair of fan-shaped raised portions 11a positioned symmetrically.

As shown in FIG. 6, the ridge line 11a1 is formed so that the height gradually increases from the rotation center P toward the outer diameter direction. FIG. 6 shows a cross section including the ridge line 11a1, but the raised portions 11a on both sides in the circumferential direction of the ridge line 11a1 are also formed so as to become higher in the outer diameter direction. Further, in order to fix the rotary blade 11 to the washing / dehydrating drive device, an upward bulging portion 11i is provided around the rotation center P to secure a space for accommodating the fixing screw.

  The shape of the upper surface of the rotary blade 11 will be described in more detail. As shown in FIG. 5, the second inclined surface 11h forming the valley 11b has a so-called “downwardly convex” curved surface in which the inclination of the tangent increases toward the boundary 11m with the first inclined surface 11g. It has become. On the other hand, the first inclined surface 11g forming the raised portion 11a is a so-called “upwardly convex” curved surface in which the inclination of the tangent line from the boundary 11m with the second inclined surface 11h decreases. The boundary 11m is an inflection point that switches from “convex downward” to “convex upward”.

  The inclination angle θh of the second inclined surface 11h immediately before reaching the boundary 11m is 30 degrees, whereas the inclination angle θg of the first inclined surface 11g immediately after the boundary 11m is 10 degrees. The inclination angle decreases discontinuously at the boundary 11m. Thus, a raised boundary portion is formed at the boundary 11m between the first inclined surface 11g and the second inclined surface 11h, and the inclined angle rapidly decreases at this raised boundary portion (at least the difference in inclination angle is 10 degrees or more).

  For this reason, when the rotary blade 11 rotates, even if the height of the raised portion 11a is not extremely large, the laundry is pushed up by the raised boundary portion, and the washing power is improved only by the washing effect when falling. In addition, the replacement of the laundry on the top and bottom is promoted, so washing unevenness is reduced. Here, conventionally, since the slope has been gently inclined from the valley to the raised portion, the laundry on the rotating rotor blade is slippery, and the laundry on the upper side is on the lower side. The laundry remained below, and lint etc. did not come off, and lint was easily left between the laundry and in the wrinkles. However, according to the present embodiment, since the top and bottom of the laundry are promoted, the yarn waste is easily taken out together with the water, and the collection rate of the yarn waste removed by the yarn waste filter 38 is improved.

  Here, as shown in FIG. 4, the circumferential length Lg at the outer peripheral end of the raised portion 11a is formed to be longer than the circumferential length Lh at the outer peripheral end of the valley portion 11b. As described above, the region of the raised portion 11a is enlarged as it goes to the outer diameter side, and the raised boundary portion is formed in a curved shape when viewed from above, so that the raised boundary portion can be secured long and the laundry lifting effect can be obtained. Rise. However, since the surface area of the raised portion 11a is smaller than the surface area of the valley portion 11b, a large amount of laundry that can be accommodated in the washing and dewatering tub 9 is secured.

  Further, with respect to the height difference between the ridgeline 11a1 and the valley bottom 11b1, the circumferential length from the ridgeline 11a1 to the valley bottom 11b1 (the circumferential length of the first inclined surface 11g and the circumferential length of the second inclined surface 11h) Half of the total) is longer. The height of the raised portion 11a increases as it approaches the outer diameter end, but the length in the circumferential direction also increases as it approaches the outer diameter end, and thus has such a length relationship regardless of the radial position.

  The movement of the laundry during washing / drying when the rotary blade 11 of the present embodiment is used will be described. When the rotary blade 11 rotates, the laundry on the rotary blade 11 rotates in the rotational direction of the rotary blade 11 and is inclined by the inclined reduction portion formed at the boundary 11m between the raised portion 11a and the valley portion 11b. When pressed upward, the laundry underneath moves up.

  By alternately rotating the rotary blade 11 in the forward and reverse directions, the vertical and radial replacement of the laundry in the washing and dewatering tub 9 is promoted. Thereby, in washing, mechanical actions (tapping washing action, push-washing action and fir tree washing action) work evenly, and it is possible to reduce washing unevenness and improve cleaning power. Further, in rinsing, it is possible to reduce rinsing unevenness. Furthermore, in drying, warm air can be uniformly distributed in the laundry, and it is possible to reduce drying unevenness, power consumption, and drying time. In the present embodiment, washing is performed while spraying the washing water from above the washing and dewatering tub 9 at a washing water level that does not exceed the upper surface of the rotary vane 11, so the washing water is used for the washing. It is important to apply evenly. For this reason, the shape of the upper surface of the rotary blade 11 is left-right symmetrical, and the movement of the laundry in the circumferential direction is substantially the same for the left-right rotation of the rotary blade 11.

  Here, the greater the difference in height between the ridgeline 11a1 and the valley bottom 11b1, the greater the vibration in the vertical direction of the laundry, thereby improving the cleaning power. However, if the ridge line 11a1 is too high, the space in the washing and dewatering tub 9 for storing laundry decreases. Therefore, in the present embodiment, as shown in FIG. 6, the ridge line 11a1 in the ridge line 11a1 has a radial inclination angle (an inclination angle of the ridge line 11a1 from the horizontal plane) θ1 of 10 to 20 degrees with respect to the horizontal plane. The height of the highest part of the part 11a, that is, the height at the outer diameter side end of the ridge line 11a1 is suppressed. In addition, in this embodiment, since the protruding part 11a and the trough part 11b are provided symmetrically, the movement of the laundry does not change even if the rotary blade 11 is rotated in either the left-right direction. Cloth entanglement and cloth slippage hardly occur, and washing unevenness and cloth pain can be suppressed.

  In addition, when the rotation speed of the rotary blade 11 is too high, the effect of pushing the laundry outward by centrifugal force becomes stronger than the effect of drawing the laundry inward, and the movement of the laundry in the radial direction is deteriorated. . For this reason, the rotational speed of the rotary blade is preferably about 100 to 130 revolutions per minute.

  The skirt region (the valley portion 11b) of the raised portion 11a has a plurality of ridges 11d curved in the same direction as the boundary 11m. In the present embodiment, as shown in FIG. 4, the protrusions 11d are arranged one by one at symmetrical positions with respect to the valley bottom 11b1, and are provided at point-symmetrical positions with respect to the rotation center P (four in total). ).

  When the rotating blade 11 is rotated, the laundry vibrates up and down on the upper surface of the rotating blade 11, so that the protrusion 11d generates a washing plate effect and is effective in improving the cleaning power. However, if the height of the protrusion 11d is too high, the action of hooking the laundry becomes large like a stirring blade (pulsator) of a general electric washing machine, which causes a fabric entanglement or a fabric damage. For this reason, as for the height of the protrusion 11, 2-4 mm is desirable so that the slip of a laundry may not be inhibited. The reason why the protrusions 11d are provided in the skirt region (the valley portion 11b) of the raised portion 11 is to prevent an increase in the damage to the laundry.

  On the upper surface of the rotary blade 11, a plurality of spherical crown-shaped curved convex portions 11e are provided. The curved convex portions 11e are distributed and arranged in the valley portions 11b. The curved surface convex portion 11e also produces the same washing plate effect as the above-described protrusion 11d and has the effect of improving the cleaning power. However, if the height of the curved convex portion 11e is too high, the slip of the laundry is reduced and the curved blade 11 rotates together with the rotary blade 11. If it becomes like this, the vibration of the up-down direction of laundry will become small, and cleaning power will fall. For this reason, the height of the curved convex portion 11e is preferably 1 to 3 mm and the diameter is preferably 20 to 30 mm so as not to hinder the slipping of the laundry.

  The upper surface of the rotary blade 11, specifically, both circumferential sides of the raised portion 11 a and the valley portion 11 b are provided with a large number of through holes 11 c for water flow and ventilation. Here, the through-hole 11c is not disposed in the top region near the ridge line 11a1 of the raised portion 11a, the ridge 11d, and the curved convex portion 11e.

  Further, in the drying process, the rotary vane 11 unravels the laundry that is biased to the inner peripheral wall surface of the washing and dewatering tub 9 by final dehydration, and promotes upward movement of the laundry by the raised boundary portion. This not only promotes the replacement of the laundry and suppresses drying unevenness, but also improves the contact efficiency between the circulating air and the laundry to increase the drying efficiency.

  FIG. 8 is a block diagram of a control unit of the washing / drying machine. A microcomputer 40 is connected to an operation button input circuit 41, a water level sensor 21, a temperature sensor 26, and a vibration sensor 27 connected to the switches 6 and 6a. Various operations in the button operation, washing process, and drying process of the user are performed. Receive information signals. The output from the microcomputer 40 is connected to the drive circuit 42 and connected to the water supply electromagnetic valve 4, the clutch 12, the drain valve 15, the circulation pump 16, the electric motor 13, the blower fan 19, the heater 20, and the like, and opening / closing and rotating them. Control energization. Further, it is connected to a 7-segment light emitting diode display 25, a light emitting diode 7 and a buzzer 43 for notifying the user of the operating state of the washing machine.

  In the electric washing machine according to the present embodiment, the water level of the washing water and the rinsing water accumulated at the bottom of the outer tub 10 in the washing process and the rinsing process basically circulates the washing water while rotating the rotary blade 11 forward and backward. In this state, the washing water collected at the bottom of the outer tub 10 greatly rises to a level where the washing water on the rotating blade 11 is immersed so as to float substantially beyond the upper surface of the rotating blade 11. You must avoid doing. However, if a state in which the rotation of the rotating blade 11 and the circulation of the washing water are stopped after a large amount of washing water is included in the laundry on the rotating blade 11 is continued for a long time, the washing water and the washing contained in the laundry Since the wash water in the water circulation system flows down by gravity and accumulates at the bottom of the outer tub 10, the wash water level in such a state is allowed to exceed the upper surface of the rotary blade 11.

  Therefore, in this embodiment, as the set water level for the washing water supply control, in the washing of a normal amount of laundry, the water level h1 slightly lower than the height of the lower surface of the rotary blade 11 in the washing and dewatering tub 9 In the washing of a laundry with an extremely small amount of cloth that is lower than the normal amount of cloth, a water level slightly higher (about 10 cm) than the water level h1 (the raised portion 11a of the rotary blade 11 in the washing and dewatering tub 9). H2) was set which is approximately equal to the highest part of the top of the top.

  In the water supply step, a predetermined amount of water is supplied to dissolve the powder detergent added according to the amount of laundry to generate wash water having a high detergent concentration. In the washing step, the washing water having a high concentration of detergent accumulated at the bottom of the outer tub 10 is circulated so as to fall on the laundry while rotating the rotary blade 11 in the forward and reverse directions while the washing / dehydrating tub 9 is stationary. Thus, the surface of the raised portion 11a is moved up and down by rotating, and washing is performed by repeatedly pushing up and vibrating the laundry containing washing water having a high detergent concentration.

  In the rinsing process, the rinsing water collected at the bottom of the outer tub 10 is rotated into the laundry while the rotary blade 11 is rotated in the forward and reverse directions while the washing and dewatering tub 9 is stationary with the same level of rinsing water as in the washing process. By circulated so as to descend, the laundry containing the washing water is moved up and down on the rotary blade 11 and the washing water is pushed out.

  In the drying process, the laundry in the washing and dewatering tub 9 that has been centrifugally dehydrated is agitated by forward and reverse rotation of the rotary blade 11 while sucking out the moist air in the outer tub 10 and water-cooling and dehumidifying it. Circulate so as to blow into the dehydration tank 9.

  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 as shown in FIGS.

Step S101
Check the state of the electric washing machine and make initial settings.

Step S102
The indicator 7 of the operation panel 8 is turned on and a washing course is set according to an instruction input from the operation button switch 6. When no instruction is input, the standard washing course or the previous washing course is automatically set.

Step S103
The instruction is input from the start switch 6a in the operation button switch 6 of the operation panel 8 and the process is branched.

Step S104
The detergent amount detection process is executed. This detergent amount detection acts on the rotary blade 11 when the rotary blade 11 is rotated in one direction with the washing / dehydrating tub 9 stationary in the dry cloth state before supplying the washing water. The washing / dehydrating drive motor 13 and the electromagnetic operation clutch mechanism 12 in the washing / dehydrating drive device are controlled so as to detect the cloth amount of the laundry based on the rotational load amount, and the appropriate amount of detergent (detergent amount) is determined based on the detected cloth amount. To do so.

  The washing water amount (water level h1) is set so that the water level does not exceed the rotary vane 11 while the cloth amount is within a predetermined cloth amount range (appropriate amount), and the water level is retained at the bottom of the outer tub 10. Further, the washing time is obtained and set based on the detection result (cloth amount). When the amount of cloth is not detected, a standard washing time is set.

Step S105
The determined amount of detergent is displayed on the display 25 of the operation panel 8.

Step S106
The detergent water supply solenoid valve is opened, and the detergent water supply is performed in the detergent charging chamber of the detergent / softening agent container 28. The user operates to close the outer lid 3 after putting the indicated amount of the powder detergent into the detergent / softening agent container 28 detergent loading chamber. The powder detergent put into the detergent charging chamber in which the detergent feed water flows flows together with the detergent feed water through the detergent / softening agent inlet 28a and falls to the bottom of the outer tub 10.

Step S107
Stop water supply when the detergent is dissolved and water is supplied. In this embodiment, the detergent water supply amount is set to about 10 liters regardless of the detergent amount (cloth amount). This amount of water is sufficient to agitate the water supplied at the bottom of the washing and dehydrating tank 9 and the detergent when the washing and dehydrating tank 9 is rotated in the subsequent detergent dissolving step (step S108). In addition, the water surface is set to be lower than the height of the lower surface of the rotary blade 11 (the laundry does not get wet before the detergent is dissolved).

Step S108
The detergent put into the bottom of the outer tub 10 at the bottom of the washing / dehydrating tub 9 by slowly rotating the washing / dehydrating tub 9 and the rotary blade 11 in one direction at a slow speed (about 70 rotations per minute). Detergent dissolution is performed to agitate the dissolved water and powder detergent to produce wash water of high detergent concentration.

Step S109
Perform pre-washing. This pre-washing is performed by intermittently stirring the rotary blade 11 while rotating and rotating the rotary blade 11 while the washing / dehydrating tank 9 is stationary. The washing water at the bottom of the outer tub 10 is dropped onto the laundry from the nozzle 34. While the rotary vane 11 and the circulation pump 16 are stopped, the detergent water supply electromagnetic valve and the washing water supply electromagnetic valve are opened while referring to the detection signal of the water level sensor 21 so that the water level does not exceed the set water level.
By repeating this operation a plurality of times, the laundry is made to become familiar with the washing water and dispersed on the rotary 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. Since high-concentration washing water is sprayed from the nozzle 34 onto the laundry, it penetrates into the laundry evenly due to the penetration of the detergent. The high-concentration washing water that has permeated into the laundry has a high oil-dissolving ability, has a great effect of dissolving fat and oil stains and raising the stains from the laundry, and provides a high detergency.

  By repeating the replenishing water, the detergent concentration of the washing water falling on the laundry decreases, and at the end of the pre-washing, it becomes about twice the standard concentration.

Step S110
Perform the main wash. In this main washing, first, the set washing time is corrected and set by detecting the amount of cloth in the same manner as described above. Thereafter, while the washing and dewatering tub 9 is stationary, the circulating pump 16 is operated while rotating the rotary blade 11 forward and backward, and the washing water accumulated at the bottom of the outer tub 10 is dropped from the nozzle 34 onto the laundry. Stirring for about 2 minutes for circulating the washing water and cloth unwinding stirring for about 1 minute for rotating the rotary blade 4 forward and backward with the operation of the circulation pump 16 stopped and the circulation of the washing water stopped are repeated. By the forward / reverse rotation of the rotary blade 11, the laundry is switched in the vertical direction and the radial direction in the washing and dewatering tub 9 and is washed evenly. Finally, the operation of the circulation pump 16 is stopped and the circulation of the washing water is stopped, so that the main washing time is finished by executing the uniform stirring for about 1 minute to rotate the rotary blade 11 forward and backward. .

Step S111
The first rinsing rinse is performed. In this rinsing, first, the drain valve 15 is opened to drain the washing water accumulated at the bottom of the outer tub 10, and then the washing / dehydrating tub 9 and the rotary vane 11 are integrally rotated in one direction for washing. Centrifugal dehydration of the washing water contained in the object. The rotational speeds of the washing / dehydrating tub 9 and the rotary blade 11 during the dehydration of the washing water are set in the same manner as the rotational speed (about 1000 rpm) in the final dehydration described later, and the dehydration operation is performed to achieve a high dehydration rate. .

  Thereafter, the drain electromagnetic valve 15 is closed and the washing and dewatering tub 9 and the rotary vane 11 are slowly rotated in one direction integrally (35 to 40 rpm), while the washing water electromagnetic valve is opened and tap water is sprinkled. Then, water is supplied so as to fall on the laundry on the rotary blade 11.

  Next, rinsing water is supplied so that the water level at the bottom of the outer tub 10 does not exceed the set water level in a state where the rotation of the washing and dewatering tub 9 and the rotary blade 11 is stopped.

  Next, similarly to the push-washing stirring in the main washing, the circulating pump 16 was operated and accumulated at the bottom of the outer tub 10 while rotating the rotary blade 11 in the forward and reverse directions while the washing / dehydrating tub 9 was stationary. Rinsing water circulation agitation rinsing is performed in which the rinsing water is circulated from the nozzle 34 to the laundry on the rotary blade 11.

  Next, in a state where the rotation of the rotary blade 11 and the operation of the circulation pump 16 are stopped, makeup water is supplied so that the water level does not exceed the set water level while detecting the water level of the rinse water accumulated at the bottom of the outer tub 10. .

  Next, while the washing / dehydrating tub 9 is stationary, the rotary pump 16 is operated while rotating the rotating blade 11 forward and backward, and the rinsing water accumulated at the bottom of the outer tub 10 is discharged from the nozzle 34 through the rotating blade 11. Rinsing water circulation stirring rinsing is performed to circulate so as to fall on the upper laundry. As in the case of washing, the laundry in the washing and dewatering tub 9 is switched between the vertical direction and the radial direction, so that the rinse water is uniformly applied to the laundry and the detergent is diluted.

  Thereafter, with the circulation pump 16 stopped and the circulation of the rinse water stopped, uniform stirring for continuing forward / reverse rotation of the rotary blade 11 is performed.

Step S112
Perform a second rinsing rinse. In the second rinsing, the soft finish agent water supply solenoid valve is opened to supply water to the soft finish agent input chamber in the detergent / softener input container 28, thereby supplying the soft finish agent in the soft finish agent input chamber to the outer tub 10. Add control to the bottom of the machine. The other operations are performed in the same manner as the first rinsing.

Step S113
Perform final dehydration. For final dehydration, the laundry dewatering drive device is operated so that the washing and dewatering tub 9 and the rotary vane 11 are integrally rotated at a high speed of about 1000 rpm in one direction with the drain electromagnetic valve 15 left open. Then, the laundry in the washing and dewatering tub 9 is centrifugally dehydrated. The operation time for the final dehydration is set to a time for obtaining a desired dehydration rate.

Step S114
The process branches after confirming whether the washing / drying course is set.

Step S115
When the washing / drying course is set, the drying is executed. This drying is performed in the middle of the drying duct 22 while rotating the rotating blade 11 in the forward and reverse directions with the washing and dewatering tub 9 being stationary in the state where the drain electromagnetic valve 15 is left open. By operating the provided blower fan 19, air in the outer tub 10 is sucked into the drying duct 22 from the water vent 10 b, and the dehumidifying mechanism installed in the drying duct 22 when passing through the drying duct 22. This is done by touching the cooling water flowing down from 22b, cooling and dehumidifying, collecting lint through a lint filter, heating the heater 20 and then blowing it into the washing and dewatering tub 9 from the hot air outlet.

  Drying is performed while monitoring the temperature of the hot air by the temperature sensor 26, and is completed when the rate of temperature change reaches a predetermined value.

In the present embodiment, the present invention can be similarly applied to an electric washing machine having no drying function.
<Embodiment 2>
FIG. 11 is a longitudinal sectional view showing the internal structure of the electric washing machine 101 of the second embodiment, and FIG. 12 is a perspective view showing the shape of the lower surface side of the rotary blade 111 in the present embodiment.

  Since the same reference numerals as those in the first embodiment denote the same parts, the description is omitted. A feature of the present embodiment is that a circulation pump is not used for circulation of washing water and a drying function is not provided. A display panel 108 having a display and various operation button switches is provided on the front side of the top cover 2 and is electrically connected to the control device 14 provided at the bottom of the housing. A water supply solenoid valve 4 and a detergent / finishing agent charging container 128 are incorporated in the rear portion of the top cover 9. A rotary vane 111 is rotatably installed inside the bottom of the washing / dehydrating tub 9.

  In the electric washing machine of the present embodiment, instead of using the circulation pump, the washing water is circulated by the method described below.

  A discharge port 71c is formed in the upper part of the circulating water channel cover 71, and a lint filter 72 is detachably attached to the discharge 71c. The upper end of the circulating water channel cover 81 is closed, and a slit-like discharge port 81 c is formed in the upper part of the circulating water channel cover 81 so as to open into the washing / dehydrating tub 9 in a substantially horizontal direction.

  When the rotating blade 111 is rotated, the back blade 111n shown in FIG. 12 becomes a centrifugal pump, and the pressure near the center of the bottom surface of the rotating blade 111 decreases, and the washing water in the gap 91 between the outer tub 10 and the washing / dehydrating tub 9 is reduced. Is sucked through a through hole 9b provided on the bottom surface of the washing and dewatering tub 9. Then, the washing water pushed outward by the centrifugal force of the back blade 111n flows into the circulation channels 71b and 81b from the water inlets 71a and 81a, and flows upward in the circulation channels 71b and 81b.

  The washing water that has risen in the circulation water channel 71 b is removed from the lint by the lint filter 72 and enters the washing and dewatering tub 9. On the other hand, the wash water that has risen in the circulation water channel 81b is sprayed in the form of a shower from the slit-shaped discharge port 81c near the center of the washing and dewatering tub 9. Thereby, washing water is evenly spread on the laundry, and the washing efficiency can be improved. The washing water in the washing / dehydrating tub 9 flows through the through hole 9 a and flows into the gap 91 between the outer tub 10 and the washing / dehydrating tub 9.

  Although not shown, the radial inclination angle (inclination angle of the ridge line 111a1 from the horizontal plane) θ2 of the ridge line 111a1 of the ridge 111a is 8 to 15 degrees with respect to the horizontal plane, and the height of the highest part of the ridge 111a. That is, the height at the outer diameter side end of the ridgeline 111a1 is suppressed. In the present embodiment, since the valley portion 111b is deeper than that in the first embodiment and the back blade 111n is provided, the height of the raised portion 111a is suppressed.

  Also in this embodiment, since the movement of the laundry in the vertical direction is promoted in the washing and dewatering tub 9, it is possible to improve the washing power in washing and reduce washing unevenness.

DESCRIPTION OF SYMBOLS 1 Outer frame 9 Washing and dewatering tank 10 Outer tank 11 Rotary blade 11a Raised part 11b Valley part 11c Through-hole 11d Projection 11e Curved convex part 11g 1st inclined surface 11h 2nd inclined surface 111n Back blade 13 Washing and dehydration drive Electric motor 14 Control device 16 Circulation pump 40 Microcomputer

Claims (4)

A washing tub, a rotary vane provided at the bottom of the washing tub, an outer tub containing the washing tub and storing washing water, and a drive mechanism for rotationally driving the washing tub and the rotary wing blade. In an electric washing machine,
The upper surface of the rotary blade is
A valley-shaped inclined surface including a bottom portion that is relatively low compared to other regions, and continuously rising on both sides in the circumferential direction of the bottom portion;
Including a relatively high ridge line portion compared to other regions, having a mountain-shaped inclined surface that continuously falls on both sides in the circumferential direction of the ridge line portion,
The inclination angle of the mountain-shaped inclined surface immediately after passing the boundary is different from the inclination angle of the valley-shaped inclined surface immediately before reaching the boundary with the mountain-shaped inclined surface. The electric washing machine is characterized by forming a shape in which a boundary portion between the valley-shaped inclined surface and the mountain-shaped inclined surface is raised. In claim 1,
The circumferential length from the bottom portion of the valley-shaped inclined surface to the ridge line portion of the mountain-shaped inclined surface is higher than the height difference between the bottom portion of the valley-shaped inclined surface and the ridge line portion of the mountain-shaped inclined surface. big,
The electric washing machine characterized in that the ridge line portion of the mountain-shaped inclined surface is formed so as to gradually increase from the central portion of the rotary blade to the outer diameter side of the rotary blade. In claim 1,
The electric washing machine characterized in that a circumferential length at an outer peripheral end of the mountain-shaped inclined surface is longer than a circumferential length at an outer peripheral end of the valley-shaped inclined surface. In claim 1,
An electric washing machine comprising: a plurality of through holes in the valley-shaped inclined surface; and the plurality of through holes on both circumferential sides of the mountain-shaped inclined surface.