WO2022034706A1

WO2022034706A1 - Washing machine and rotating blade panel for washing machines

Info

Publication number: WO2022034706A1
Application number: PCT/JP2021/007846
Authority: WO
Inventors: 瞬平安倍; 祐太朗林; 慎勇希北; 好宏矢田; 駿河原崎; 光渡辺; 修司会田; 道太菅原
Original assignee: 日立グローバルライフソリューションズ株式会社
Priority date: 2020-08-14
Filing date: 2021-03-02
Publication date: 2022-02-17
Also published as: EP4123074A4; CN115667614A; EP4123074A1

Abstract

A rotating blade panel (4) in a washing machine that discharges drying air towards the rotating blade panel, from above a washing and water discharge tank, has on the upper surface of the rotating blade panel (4): a plurality of upright sections (4a, 4a), a plurality of valleys (4b, 4b), and intermediate sections (4c) provided between the upright sections (4a) and the valleys (4b). The valleys (4b) have two protrusions (4d) that extend in the radial direction, from an outer peripheral end towards an inner peripheral end. The two protrusions (4d) are in a contracting shape that gets closer from the outer peripheral end towards the inner peripheral end. A bottom section (4b1) between the two protrusions (4d) has a gentle curved surface, from the outer peripheral end towards the inner peripheral end.

Description

Rotorcraft for washing machines and washing machines

The present invention relates to a washing machine and a rotary wing board used in the washing machine.

A washing machine in which the washing tub is placed vertically has a rotary wing board at the bottom of the washing tub, and the rotary wing board is rotated in the forward and reverse directions for washing. In Patent Document 1, regarding the shape of the rotary blade, the valley-shaped inclined surface and the mountain-shaped inclined surface are discontinuously connected so as to exert an upward component force on the laundry by rotating, and the valley is formed. It is disclosed that the inclined surface is formed so that the inclined angle decreases from the inclined surface to the mountain-shaped inclined surface.

JP-A-2015-204923

Patent Document 1 has a structure in which the valley portion and the inclined portion formed on the turntable blade promote the vertical exchange of the laundry and reduce the uneven drying. However, this structure did not take into account the wrinkles formed during drying.

The present invention solves the above-mentioned conventional problems, and provides a washing machine and a rotary wing board for a washing machine that suppresses uneven drying and further suppresses wrinkles.

The present invention is a drive for rotationally driving a washing tub, a rotary wing provided at the bottom of the washing tub, an outer tub containing the washing tub and storing washing water, and the washing tub and the rotary wing board. It has a portion and a discharge port for discharging dry air from the upper part of the washing tub toward the rotorcraft, and the rotorcraft has a plurality of raised portions and a plurality of raised portions on the upper surface of the rotorcraft. The valley portion has a valley portion and an intermediate portion provided between the raised portion and the valley portion, and the valley portion has a ridge portion extending in the radial direction from the outer peripheral end to the inner peripheral end. It has at least two, and the two ridges have a drawing shape that approaches from the outer peripheral end toward the inner peripheral end, and the bottom portion between the two ridges is from the outer peripheral end to the inner peripheral end. It is characterized by having a gentle curved surface toward.
Further, in the present invention, the washing tub, the rotary wing provided at the bottom of the washing tub, the outer tub containing the washing tub and storing the washing water, and the washing tub and the rotary wing board are rotationally driven. The rotary blade has an intermediate portion, a valley portion provided at a position lower than the lowest position of the intermediate portion, and a ridge provided at a position higher than the highest position of the intermediate portion. The raised portion has a convex inclined surface, the valley portion has a concave inclined surface, the intermediate portion has an inclined surface, and the valley portion and the raised portion have a portion. It is characterized in that the inclination angle of the inclined surface of the intermediate portion on the raised portion side is larger than the inclined angle on the valley side.

According to the present invention, it is possible to provide a washing machine that suppresses uneven drying and further suppresses wrinkles.

It is a right-right vertical sectional view which shows the washing machine which mounts the rotary wing board of this embodiment. It is a perspective view of the rotary wing board mounted on the washing machine of this embodiment. It is a top view of the rotary wing board mounted on the washing machine of this embodiment. FIG. 3 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a cross-sectional view taken along the line BB of FIG. It is a perspective view which shows the shape of the lower surface side of the rotary vane of this embodiment. FIG. 3 is a cross-sectional view taken along the line CC of FIG.

Hereinafter, embodiments 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, a washing machine S (so-called vertical washing / drying machine) capable of washing, rinsing, dehydrating, and drying will be described as an example.

FIG. 1 is a right vertical sectional view showing a washing machine on which a rotary blade according to the present embodiment is mounted.
As shown in FIG. 1, the washing machine S includes an outer frame 1 of a housing, an outer tub 2 for storing washing water, a washing / dehydrating tub 3 (washing tub), a rotary wing board 4 (pulsator), and a drive motor ( The drive unit) 10 is provided.

The outer frame 1 is a sheet metal (iron plate) formed into a square cylinder by press working or the like. Further, a base 32 made of synthetic resin is provided at the lower part of the outer frame 1. Further, a top cover (upper plate) 6 made of synthetic resin is provided on the upper portion of the outer frame 1. Although not shown, the inside of the outer frame 1 is reinforced with a reinforcing member. Further, the base 32 is reinforced by providing a grid-like rib or the like inside.

The outer tank 2 is made of synthetic resin, has a substantially cylindrical shape with a bottom, and is supported in the center of the outer frame 1 via a vibration isolator (not shown). The anti-vibration device is made of a spring or elastic rubber, and the outer tank 2 is suspended and supported from the upper part in the outer frame 1.

The washing / dehydrating tub (washing tub) 3 has a bottomed cylindrical shape for accommodating laundry (clothes) to be washed, dehydrated, and dried. Further, in the washing / dehydrating tub 3, the rotation axis is oriented in a substantially vertical direction. Further, the washing / dehydrating tub 3 is provided in the center of the inside of the outer tub 2 and is rotatably supported in the outer tub 2. Further, the washing / dehydrating tub 3 has a large number of small through holes 3a (only a part of which is shown in FIG. 1) for water passage and ventilation in the outer peripheral wall thereof. Further, the washing / dehydrating tub 3 has a plurality of through holes 3b for water passage and ventilation in the bottom wall thereof. Further, a fluid balancer 3c is provided at the upper edge of the washing / dehydrating tank 3. Further, at the bottom of the washing / dehydrating tank 3, a rotary blade 4 for stirring and rinsing the washing water is rotatably provided.

The rotary blade 4 repeats forward / reverse rotation during washing operation and dry operation. Further, during the dehydration operation, the rotary blade 4 rotates at high speed together with the laundry in the washing / dehydrating tub 3 together with the washing / dehydrating tub 3 to dehydrate the water contained in the laundry by centrifugal force. The details of the rotary blade 4 will be described later.

The drive motor 10 is provided in the outer frame 1 and selectively rotates and drives the rotary blade 4 and the washing / dehydrating tank 3. Further, as the drive motor 10, for example, a DC brushless motor is used. The DC brushless motor is controlled by vector control. Further, the drive motor 10 may directly drive the rotary blade 4 and the washing / dehydrating tank 3, or may be driven by using a reduction mechanism such as a belt.

An outer lid 5 that can be opened and closed is provided on the upper part of the outer frame 1. The rear side of the outer lid 5 is axially supported by a top cover 6 provided on the upper part of the outer frame 1. In the upper part of the outer tank 2, an inner lid 34 is provided below the outer lid 5 so as to be openable and closable around the rear axis. The laundry is taken in and out of the washing / dehydrating tub 3 by opening the outer lid 5 and the inner lid 34.

Inside the outer frame 1, a water supply unit 7 is provided on the rear side of the outer lid 5 of the top cover 6. The water supply unit 7 has a water supply box (not shown) having a plurality of water channels inside. The water supply unit 7 is supplied from the water supply hose connection port 8 protruding upward from the top cover 6. Tap water or bath water is supplied from the water supply hose connection port 8 and poured into the inside of the outer tank 2. Further, on the front side of the top cover 6, a detergent and finishing agent charging device 35 is provided. The detergent and finishing agent are poured between the outer tub 2 and the washing / dehydrating tub 3 by the charging hose 36.

Further, the washing machine S is provided with a drying mechanism 9 for drying the laundry. The drying mechanism 9 circulates and dehumidifies the drying air for drying the laundry in the washing / dehydrating tank 3. The drying mechanism 9 is mostly occupied by the air circulation path for drying. The drying air circulation passage includes a bottom circulation passage 20 communicating with the bottom of the outer tank 2 and a dehumidifying vertical passage 21 extending upward from the bottom circulation passage 20.

Further, the drying mechanism 9 has a blower 22 and a heater (not shown) for producing dry air in the drying process of the washing machine S. The suction side of the lower part of the blower 22 is connected to the upper end of the dehumidifying vertical passage 21. A drying filter 45 is arranged between the blower 22 and the dehumidifying vertical passage 21 to prevent foreign matter from flowing into the blower 22. The discharge side at the front of the blower 22 is connected to and communicates with the return connection circulation path 25. The return connection circulation path 25 communicates with the upper part of the outer tank 2 via a part of the upper bellows hose 23. The return connection circulation path 25 is formed with a discharge port 23a for discharging the dry air into the washing / dehydrating tank 3. From the discharge port 23a, as shown by the arrow in FIG. 1, the dry air is discharged from the upper bellows hose 23 into the washing / dehydrating tank 3 in the vertical direction downward and is blown to the outer peripheral region of the rotary blade 4. It has become.

The bottom circulation path 20 communicates with the bottom of the outer tank 2 via a part of the lower bellows hose 26. The lower bellows hose 26 is connected to the bottom drop portion 31 of the outer tank 2. The bottom drop portion 31 communicates with the washing water drainage channel 42 for drainage via a normally closed type drain valve 44 that is opened only at the time of drainage.

The drain valve 44 is closed during the washing operation and the drying operation. The drain valve 44 opens at the time of draining the washing water, and drains the washing water and the rinsing water stored in the outer tub 2 from the washing water drainage channel 42 to the outside (outside the machine) of the washing machine S.

The washing machine S is provided with a water level sensor 47 that detects the water level of washing water and rinsing water accumulated in the outer tub 2. An air trap 50 is provided near the bottom of the outer tank 2. An air tube 49 is communicated with the air trap 50, and a water level sensor 47 is communicated with and connected to the upper end of the air tube 49.

The washing water and rinsing water collected in the outer tub 2 flow from the circulating

water channels

51a and 61a into the circulating

water channels

51b and 61b, and flow upward in the circulating

water channels

51b and 61b. In the washing water that has risen in the circulating water channel 51b, the lint is removed by the lint filter 33 and enters the washing / dehydrating tank 3. On the other hand, the washing water that has risen in the circulation water channel 61b is sprinkled in a shower shape from the slit-shaped discharge port 61c to the vicinity of the center in the washing / dehydrating tank 3.

Next, the details of the rotary blade 4 will be described with reference to FIGS. 2 to 7.
The rotary blade 4 is rotatably installed in the center of the bottom of the washing / dehydrating tank 3 (see FIG. 1). The rotary blade 4 is provided with a plurality of raised portions formed by an inclined surface, which repeatedly apply an upward component force to the laundry charged on the rotary blade 4 by rotating. The washing / dehydrating tank 3 and the rotary blade 4 are selectively driven to rotate by a drive motor 10 (drive unit).

FIG. 2 is a perspective view of a rotary blade.
As shown in FIG. 2, the upper surface of the rotary blade 4 is composed of a plurality of raised portions 4a, a plurality of valley portions 4b, and an intermediate portion 4c provided between the raised portions 4a and the valley portions 4b. To. In the present embodiment, two raised portions 4a formed at positions facing each other across the rotation center (center portion) P of the rotary wing board 4 and formed at positions facing each other across the rotation center P of the rotary wing board 4. It is provided with two valley portions 4b to be formed, and four intermediate portions 4c connecting each raised portion 4a and each valley portion 4b.

In the rotary blade 4 of the present embodiment, the raised portion 4a and the intermediate portion 4c are continuously connected. Further, the intermediate portion 4c and the valley portion 4b are continuously connected. In the present embodiment, "continuously connected" means that the surface is formed as a continuous surface when the raised portion 4a is switched to the intermediate portion 4c and when the intermediate portion 4c is switched to the valley portion 4b. do.

The raised portion 4a has a convex inclined surface 4a2 that includes a ridge line that is relatively high with respect to the central region (rotation center side) and continuously descends on both sides in the circumferential direction. That is, the raised portion 4a has a ridge line 4a1 having the highest height position in the center in the circumferential direction among the raised portions 4a. The shape of the raised portion 4a in a plan view is substantially a fan shape (see FIG. 3 described later).

As described above, the rotary blade 4 is formed of a gently inclined surface (convex inclined surface 4a2) in which an upward component force is repeatedly applied to the laundry charged on the rotary blade 4 by rotating. A plurality of (two in this embodiment) raised portions 4a are provided.

The valley portion 4b includes a portion relatively lower than the central region (rotation center side), and has a bottom portion 4b1 (concave inclined surface, valley-shaped concave curved surface) whose both sides in the circumferential direction continuously rise. .. The bottom portion 4b1 has a so-called bowl shape in which the central portion in the radial direction is low and the inner diameter side portion and the outer diameter side portion are high. Further, the valley portion 4b is configured as a region wider in the circumferential direction than the raised portion 4a. The shape of the valley portion 4b in a plan view is substantially fan-shaped like the raised portion (see FIG. 3 described later).

The rotary blade 4 has two (plural)

protrusions

4d and 4d in the valley portion 4b (the foot region of the raised portion 4a). The ridge portions 4d are arranged one by one at symmetrical positions in the circumferential direction with the bottommost portion 4b2 interposed therebetween. Further, the rotary blade 4 is provided with two other ridges 4d (a set of ridges 4d) at positions symmetrical with respect to the center of rotation P. As described above, in the present embodiment, a total of four ridges 4d (two sets of ridges 4d and two pairs of ridges 4d) are provided.

Further, the ridge portion 4d has a ridge portion 4d1 that gently descends toward the bottommost portion 4b2 of the valley portion 4b. Further, the two ridge portions 4d have ridge inclined portions 4d1 formed on the side surfaces facing each other.

Further, the ridge portion 4d is configured such that the side surface 4d5 on the opposite side of the ridge portion 4d1 in the circumferential direction rises substantially perpendicular to the surface of the valley portion 4b. As a result, the laundry is easily agitated by the side surface 4d5 when the rotary blade 4 is rotated.

Further, on the upper surface of the rotary blade 4, a plurality of crown-shaped curved convex portions 4e are formed. The curved surface convex portions 4e are dispersedly arranged in the valley portions 4b. By providing these curved convex portions 4e, the laundry vibrates up and down, which has the effect of improving the cleaning power.

Further, the upper surface of the rotary blade 4 is provided with a large number of through holes 4f for water passage and ventilation on both sides of the raised portion 4a in the circumferential direction and the valley portion 4b. Here, the through hole 4f is not arranged in the top region near the ridge line 4a1 of the raised portion 4a, the ridge portion 4d, and the curved surface convex portion 4e. By not forming the through hole 4f in the vicinity of the ridge line 4a1 or in the ridge portion 4d, it is possible to suppress the catching with the laundry and reduce the cloth pain of the laundry. Further, by not forming the through hole 4f in the ridge portion 4d, it is possible to suppress the obstruction of the flow of dry air.

FIG. 3 is a plan view (top view) of the rotary blade.
As shown in FIG. 3, the two ridges 4d (a set of ridges 4d) are formed so as to extend linearly from the outer peripheral end (outermost outermost end) 4d2 of the rotary blade 4 to the inner peripheral end 4d3. Has been done. Further, the two ridge portions 4d are arranged at positions farthest from each other in the circumferential direction at the outer peripheral end 4d2, and are arranged at positions closest to each other in the circumferential direction at the inner peripheral end 4d3. In other words, the two ridges 4d are configured to have a squeezing shape toward the inside in the radial direction (so as to have a V-shape (H-shape) in a plan view).

Further, the two ridge portions 4d are configured such that one ridge inclined portion 4d1 and the other ridge inclined portion 4d1 are in contact with each other at the inner peripheral end 4d3.

The intermediate portion 4c is formed with a predetermined angle range (for example, 5 degrees) in the circumferential direction, and is located between the raised portion 4a and the valley portion 4b. The raised portion 4a and the intermediate portion 4c are connected by a raised boundary portion 4g. The raised boundary portion 4g extends linearly in the radial direction from the rotation center P when viewed from above. The valley portion 4b and the intermediate portion 4c are connected by a valley boundary portion 4h. The valley boundary portion 4h extends linearly from the rotation center P in the radial direction when viewed from above.

FIG. 4 is a schematic cross-sectional view of the intermediate portion cut in AA of FIG. 3 (only the intermediate portion is cut out). Note that FIG. 4 shows a case where the cut is performed by a straight line orthogonal to the raised boundary portion 4g.

The intermediate portion 4c has an inclined surface 4c1, the raised boundary portion 4g is located at the highest position of the inclined surface 4c1, and the valley boundary portion 4h is located at the lowest position of the inclined surface 4c1.

As shown in FIG. 4, the angle (inclination angle θ1) of the tangent line T1 of the intermediate portion 4c from the horizontal plane H at the valley boundary portion 4h is preferably 30 ° ≦ θ1 ≦ 40 °. On the other hand, the angle (inclination angle θ2) of the tangent line T2 of the intermediate portion 4c at the raised boundary portion 4g from the horizontal plane H is preferably 40 ° <θ2 ≦ 60 °. As described above, the inclination angle θ2 is configured to be larger than the inclination angle θ1. That is, the intermediate portion 4c is configured to be a so-called "downwardly convex" curved surface in which the inclination of the tangent line increases from the valley portion 4b side to the raised portion 4a side.

FIG. 5 is a cross-sectional view of the rotary blade cut in BB of FIG. Note that FIG. 5 shows the case where the ridge line 4a1 of the raised portion 4a is cut.
As shown in FIG. 5, the raised portion 4a is formed so that the height gradually increases from the rotation center (center portion of the rotary blade 4) P toward the outer diameter direction (outer diameter side). Further, the ridge line 4a1 of the raised portion 4a is configured so that the outer diameter side is higher than the flange surface 4s of the rotary blade plate 4. Further, the ridge line 4a1 of the raised portion 4a is configured so that the inner diameter side (center portion side) is lower than the flange surface 4s.

In order to fix the rotary blade 4 to the washing / dehydrating drive device (drive motor 10), an upward bulging portion 4t is provided around the rotation center P to secure a space for accommodating the fixing screw (not shown). There is.

By the way, the larger the height difference between the raised portion 4a and the valley portion 4b, the greater the vertical vibration of the laundry, and the better the cleaning power. However, if the raised portion 4a is made too high, there is a problem that the space in the washing / dehydrating tub 3 for storing the laundry is reduced. Therefore, in the present embodiment, the maximum height h1 of the raised portion 4a from the flange surface is set to 20 mm or more and 25 mm or less, and the space for accommodating the laundry is suppressed from being reduced.

FIG. 6 is a perspective view showing the shape of the lower surface side of the rotary blade plate 4.
As shown in FIG. 6, a back blade 71 is provided on the back surface (lower surface) of the rotary blade plate 4. The back blade 71 has a plurality of radial blade portions 71a extending in the radial direction from the center of rotation, and a plurality of circumferential blade portions 71b extending in the circumferential direction.

The radial blade portion 71a is formed in a plate shape, is formed so as to project long on the back side of the raised portion 4a, and is formed so as to project shortly on the back side of the valley portion 4b. The circumferential blade portion 71b is formed in a concentric circle shape, and is formed so as to project long on the back side of the raised portion 4a. Further, the circumferential blade portion 71b is arranged so as to intersect the radial blade portion 71a.

When the rotary blade 4 configured in this way rotates, the back blade 71 becomes a centrifugal pump, the pressure near the center of the bottom surface of the rotary blade 4 decreases, and the outer tub 2 (see FIG. 1) and the washing / dehydrating tub 3 The washing water in the gap with (see FIG. 1) is sucked in through the through hole 3b provided on the bottom surface of the washing / dehydrating tank 3. The washing water sucked from the through hole 3b flows through the

circulation channels

51a and 51b (see FIG. 1) and the lint filter 33 (see FIG. 1), and also flows through the

circulation channels

61a and 61b and the discharge port 61c (see FIG. 1). ), And it is sprayed and poured into the washing / dehydrating tank 3.

FIG. 7 is a cross-sectional view of a rotary blade cut at CC in FIG. Note that FIG. 7 shows the case where the valley portion 4b is cut at the lowest bottom portion 4b2.
As shown in FIG. 7, the bottommost portion 4b2 of the valley portion 4b has an inner diameter side inclined surface 4b3 and an outer diameter side inclined surface 4b4 so that the inner diameter side and the outer diameter side are higher. The outer diameter side inclined surface 4b4 is configured to have a steeper inclination than the inner diameter side inclined surface 4b3. Further, the upper end of the outer diameter side inclined surface 4b4 has a higher height position than the inner diameter side inclined surface 4b3. Further, the outer diameter side inclined surface 4b4 has the same height as the flange surface 4s of the rotary blade plate 4. Further, the bottom portion 4b1 has an intermediate inclined surface 4b5 that descends from the inner diameter side inclined surface 4b3 toward the outer diameter side inclined surface 4b4. As described above, the bottom portion 4b1 between the two ridge portions 4d has a gentle curved surface from the outer peripheral end 4d2 to the inner peripheral end 4d3. Further, the gentle curved surface is a concave shape with the concave surface facing upward.

Further, since the outer diameter side inclined surface 4b4 is formed to have a steeper inclination than the inner diameter side inclined surface 4b3, the loss to the dry air is reduced when the dry air is taken in from above the outer peripheral end 4d2 of the rotary blade 4. It is designed to do.

Further, since the intermediate inclined surface 4b5 is an inclined surface upward toward the inner diameter side, the intermediate inclined surface 4b5 is directed toward the inner diameter side inclined surface 4b3 without giving a large loss to the dry air from the intermediate inclined surface 4b5 to the inner diameter side inclined surface 4b3. Can flow smoothly. As a result, the dry air discharged from the inner diameter side inclined surface 4b3 can be vigorously discharged upward, and the replacement of clothes can be promoted.

The inner peripheral end 4d3 of the ridge portion 4d is set at a position higher than the lowest point 4d4 of the ridge portion 4d connecting the outer peripheral end 4d2 and the inner peripheral end 4d3 of the ridge portion 4d. This makes it possible to construct an air passage that further increases the wind speed.

The dry air generated by the drying mechanism 9 is blown from above the rotary blade 4 toward the outer peripheral end of the rotary blade 4. Then, when the dry air is blown to the valley portion 4b (bottom portion 4b1) between the two ridge portions 4d (a set of ridge portions 4d), the bottom portion 4b2 (bottom portion 4b1) is shown by a thick solid arrow. It flows from the outer diameter side to the inner diameter side along the bottom surface of the. That is, the dry air is introduced as a substantially vertical downward flow on the outer diameter side of the bottommost portion 4b2, and is derived as a substantially vertical upward flow at the inner diameter end of the bottommost portion 4b2.

Next, the movement of the laundry during washing / drying when the rotary blade 4 of the present embodiment is used will be described.
In the washing step (washing step), water is supplied so as to be accumulated at the bottom of the outer tank 2 while maintaining a water level that does not exceed or slightly exceeds the upper surface of the rotary blade 4 in the subsequent washing step. Then, by dissolving a detergent such as powder, washing water having a high detergent concentration is generated at the bottom of the outer tank 2. Then, the rotary blade 4 is rotated in the forward and reverse directions while circulating the washing water so as to fall on the laundry, and the laundry is repeatedly pressed and washed by applying an upward force to the laundry. In the rinsing step (washing step) after washing, the water level that does not exceed or slightly exceeds the upper surface of the rotary blade 4 is maintained as in the washing step. Then, the rotary blade 4 is rotated in the forward and reverse directions while circulating the rinsing water supplied so as to be accumulated in the bottom of the outer tub 2 so as to fall on the laundry, and an upward force is repeatedly applied to the laundry. As a result, the washing water (detergent component) contained in the laundry is pushed out and rinsed. In the drying step, the rotary blade 4 is rotated in the forward and reverse directions, the air in the outer tub 2 is sucked out, water-cooled and dehumidified, and then heated and circulated so as to be blown into the washing and dehydrating tub 3 to dry the laundry. ..

When the rotary blade 4 rotates during the washing process, the laundry is pushed up by the inclination of the intermediate portion 4c. The cleaning power is improved by the tapping effect when the laundry pushed up at this time falls and the scrubbing effect due to the frictional force between the rotary blade 4 and the laundry. Further, since the tangents T1 and T2 have a shape (θ2> θ1) in which the inclination of the tangents T1 and T2 increases from the lowest portion (valley boundary portion 4h) of the intermediate portion 4c to the raised portion 4a side (raised boundary portion 4g), the rotary blade disc. By the rotation of 4, the lower garment is flipped up to the upper side, and the exchange of the upper and lower garments is promoted. This replacement of clothes reduces uneven washing of clothes.

In the intermediate portion 4c, the inclination angle θ2 on the raised portion 4a side is larger than the inclination angle θ1 on the valley portion 4b side. In this way, by making the structure in which the inclination angle increases from the intermediate portion 4c to the raised portion 4a, an upward force is applied to the laundry (clothing), and the laundry existing on top of each other is replaced. It is promoted and the entanglement between laundry is suppressed.

Further, when the rotary blade 4 rotates, the raised portion 4a causes the laundry to vibrate up and down on the upper surface of the rotary blade 4, but the number of vibrations increases due to the ridge portion 4d, which is effective in improving the cleaning power. be.

Further, even when the rotary blade 4 rotates during the drying process, the laundry is pushed up by the inclination of the intermediate portion 4c. Further, since the shape (θ2> θ1) in which the inclinations of the tangents T1 and T2 increase from the bottommost portion (valley boundary portion 4h) of the intermediate portion 4c to the raised portion 4a side (raised boundary portion 4g), the rotary blade is provided. By the rotation of 4, the lower garment is flipped up to the upper side, and the exchange of the upper and lower garments is promoted. This replacement of clothes reduces uneven drying of clothes.

By the way, in the conventional rotary wing board, when the wind is blown into the washing / dehydrating tank from above and the laundry is dried, the laundry is entangled with each other, and it is difficult to spread the clothes by the wind. rice field. According to the present embodiment, the inclination of the tangent line increases from the lowest portion (valley boundary portion 4h) of the intermediate portion 4c to the raised portion 4a side. Entanglement is suppressed. As a result, the laundry is easily spread in the washing / dehydrating tank 3 by the drying air, and the drying wrinkles are reduced.

Further, in the present embodiment, the raised portion 4a and the valley portion 4b are provided symmetrically (symmetrically with the rotation center P in between). Therefore, even if the rotary wing board 4 is rotated in either the left-right direction, the movement of the laundry does not change, so that the cloth is less likely to be entangled or the cloth is biased, and uneven washing and cloth pain can be suppressed.

Further, in the present embodiment, by promoting the replacement of clothes during washing and stirring, the lint existing between the clothes can be easily taken out together with the washing liquid, and the lint collection performance is improved.

Further, when the rotary blade 4 rotates, if the amount of laundry is large, the laundry collides with the ridge portion 4d before colliding with the raised portion 4a, and an upward component force is generated. Due to this component force, the laundry has an upward velocity component, and the impact when the laundry is flipped up by the raised portion 4a is suppressed. As a result, there is an effect of reducing cloth damage and a load on the drive unit (drive motor 10).

Further, the ridge portion 4d has a ridge portion 4d1 that gently descends toward the bottommost portion 4b2 of the rotary blade 4. By providing the ridge portion 4d1, the effect of applying an upward component force to the laundry is enhanced, and at the same time, the impact when colliding with the ridge portion 4d is suppressed, and the cloth damage is reduced.

Further, in the valley portion 4b, the two ridge portions 4d arranged at positions symmetrical in the circumferential direction with the bottommost portion 4b2 interposed therebetween are radially oriented from the outer peripheral end 4d2 of the rotary blade 4 toward the inner peripheral end 4d3. It is connected at a predetermined height. Further, the ridge portions 4d arranged facing each other have a shape narrowed from the outer peripheral end 4d2 to the inner peripheral end 4d3 (V-shaped in plan view or C-shaped in plan view). As a result, when wind is blown into the washing / dehydrating tank 3 from above the rotary blade 4, an air passage that increases the wind speed from the outer peripheral end 4d2 to the inner peripheral end 4d3 can be formed, and the inner peripheral end 4d3 can be formed. In, a wind flow that seems to blow upward occurs. By constructing such a wind flow, clothes can be dried while being lifted from the bottom to the top, which is effective in suppressing wrinkles during drying.

Further, the ridge portion 4d arranged to face each other has a ridge portion 4d1 that gently descends toward the bottommost portion 4b2 of the rotary blade plate 4. As a result, the flow path is narrowed from the ridges 4d arranged facing each other toward the bottom 4b2, so that the wind speed from the outer peripheral end 4d2 to the inner peripheral end 4d3 can be further increased, and the wind speed is further increased at the inner peripheral end 4d3. The flow of the wind that blows up can be further increased. By constructing such a wind flow, clothes can be dried while being lifted from the bottom to the top, which is effective in further suppressing wrinkles during drying.
That is, when the clothes are dried by blowing air into the washing tub from above, the washing machine forms an air passage that lifts the clothes instead of suppressing the clothes, suppresses uneven drying, and further suppresses wrinkles. Can be provided.

As described above, in the washing machine S of the present embodiment, the washing / dehydrating tub 3, the rotary wing board 4 provided at the bottom of the washing / dehydrating tub 3, and the washing / dehydrating tub 3 are included in the washing / dehydrating tub 3. An outer tub 2 for storing, a drive motor 10 for rotationally driving the washing / dehydrating tub 3 and the rotary wing board 4, and a discharge port 23a for discharging dry air from the upper part of the washing / dehydrating tub 3 toward the rotary wing board 4. , Have. The rotary blade 4 has a plurality of raised portions 4a, a plurality of valley portions 4b, and an intermediate portion 4c provided between the raised portions 4a and the valley portions 4b on the upper surface of the rotary blade plate 4. .. The valley portion 4b has two ridge portions 4d extending in the radial direction from the outer peripheral end 4d2 toward the inner peripheral end 4d3. The two ridges 4d have a diaphragm shape that approaches from the outer peripheral end 4d2 toward the inner peripheral end 4d3 (see FIGS. 2 and 3). The bottom portion 4b1 between the two ridge portions 4d has a gentle curved surface from the outer peripheral end 4d2 to the inner peripheral end 4d3 (see FIGS. 2 and 3). According to this, since the dry air discharged from the discharge port 23a provided above the rotary blade 4 can be discharged upward from the center side, it is possible to promote the replacement of clothes and suppress the uneven drying. Moreover, it becomes possible to suppress dry wrinkles.

Further, in the present embodiment, the two ridge portions 4d have a ridge portion 4d1 that descends toward the bottom portion 4b1 on the side facing each other (see FIG. 2). According to this, an upward force can be applied to the clothes, and the replacement of clothes can be promoted.

Further, in the present embodiment, the height of the inner peripheral end 4d3 of the ridge portion 4d is higher than the lowest point 4d4 of the ridge portion 4d connecting the outer peripheral end 4d2 and the inner peripheral end 4d3 (FIG. 7). reference).

Further, in the present embodiment, the raised portion 4a is formed at a position higher than the highest position of the intermediate portion 4c, and the valley portion 4b is formed at a position lower than the lowest position of the intermediate portion 4c. The raised portion 4a has a convex inclined surface 4a2, and the valley portion 4b has a bottom portion 4b1 (concave inclined surface). The intermediate portion 4c has an inclined surface 4c1 and is continuously connected to the valley portion 4b and the raised portion 4a. The inclination angle θ2 of the inclined surface 4c1 of the intermediate portion 4c on the raised portion 4a side is larger than the inclination angle θ1 on the valley portion 4b side (see FIG. 4). According to this, during the drying step, the clothes on the lower side are flipped up by the rotation of the rotary blade 4, and the replacement of the upper and lower clothes is promoted, so that the uneven drying of the clothes is reduced. Further, during the washing process, the laundry is pushed up by the inclination of the intermediate portion 4c, so that the washing effect when the pushed-up laundry falls and the frictional force between the rotary blade 4 and the laundry are applied. The detergency is improved by the scrubbing effect. Further, the rotation of the rotary blade 4 causes the lower clothes to be flipped up to the upper side, and the upper and lower clothes are replaced with each other. Therefore, the replacement of the clothes reduces the uneven washing of the clothes.

Further, in the present embodiment, the inclination angle θ1 on the valley portion 4b side of the intermediate portion 4c is 30 ° ≦ θ1 <40 °, and the inclination angle θ2 on the raised portion 4a side of the intermediate portion 4c is 40 ° <θ2 ≦. It is 60 ° (see FIG. 4). According to this, the exchange of the upper and lower clothes is promoted, and the uneven drying of the clothes is reduced.

Further, the rotary blade 4 of the present embodiment is a rotary blade for the washing machine S in which dry air is discharged from the upper part of the washing / dehydrating tank 3, and has a plurality of raised portions 4a and a plurality of raised portions 4a on the upper surface. It has a valley portion 4b and an intermediate portion 4c provided between the raised portion 4a and the valley portion 4b. The valley portion 4b has two ridge portions 4d extending in the radial direction from the outer peripheral end 4d2 toward the inner peripheral end 4d3. The two ridges 4d have a diaphragm shape that approaches from the outer peripheral end 4d2 toward the inner peripheral end 4d3 (see FIGS. 2 and 3). The bottom portion 4b1 between the two ridge portions 4d has a gentle curved surface from the outer peripheral end 4d2 to the inner peripheral end 4d3 (see FIGS. 2 and 3). According to this, since the dry air discharged from the discharge port 23a provided above the rotary blade 4 can be discharged upward from the center side, it is possible to promote the replacement of clothes and suppress the uneven drying. Moreover, it becomes possible to suppress dry wrinkles.

Further, in the present embodiment, the upper portion of the convex inclined surface 4a2 gradually rises from the rotation center P of the rotary blade 4 toward the outer diameter side (see FIG. 5). According to this, the clothes move outward due to the centrifugal force when agitated during the washing operation, but the larger the height difference between the raised portion 4a and the valley portion 4b, the more the vertical movement of the clothes is promoted and the cleaning power is improved. do. In addition, even during the drying operation, the upper and lower parts of the clothes are exchanged, and uneven drying can be suppressed.

Further, in the present embodiment, the valley portion 4b and the intermediate portion 4c are provided with a plurality of through holes 4f, and the raised portion 4a is not provided with the through holes 4f (see FIGS. 2 and 3). According to this, it becomes a resistance by forming a through hole in the raised portion 4a. As a result, it is possible to suppress the catching with the laundry and reduce the cloth pain of the laundry.

Further, in the present embodiment, the valley portion 4b has a plurality of ridge portions 4d. According to this, when the rotary blade 4 rotates, the garment can be lifted in advance by the ridge portion 4d before the garment is lifted by the intermediate portion 4c. As a result, cloth pain and motor load can be reduced.

Further, the present invention is not limited to the above-described embodiment, and includes various modifications. For example, in the present embodiment, the raised boundary portion 4g, the valley boundary portion 4h, and the ridge portion 4d are formed in a straight line when viewed from above, but may be curved in a bow shape.

Further, in the present embodiment, the same can be applied to an electric washing machine having no drying mechanism.

1 Outer frame 2 Outer tub 3 Washing and dehydration tub (washing tub)
4 Rotorcraft 4a Ridge 4a1 Ridge 4a2 Convex slope 4b Valley 4b1 Bottom (concave slope)
4b2 Bottom part 4c Intermediate part 4c1 Inclined surface 4d Protrusion part 4d1 Protrusion inclined part (Inclined part)
4d2 Outer peripheral end 4d3 Inner peripheral end 4d4 Bottom point 4e Curved surface convex part 4f Through hole 4g Uplift boundary part 4h Valley boundary part 10 Drive motor (drive part)
23a Discharge port 71 Back blade S Washing machine θ1 Tilt angle on the valley side θ2 Tilt angle on the raised part side

Claims

The washing tub and
The rotary wing provided at the bottom of the washing tub and
An outer tub that contains the washing tub and stores washing water,
A drive unit that rotationally drives the washing tub and the rotary wing board,
It has a discharge port for discharging dry air from the upper part of the washing tub toward the rotor blade.
The rotorcraft has a plurality of raised portions, a plurality of valley portions, and an intermediate portion provided between the raised portions and the valley portions on the upper surface of the rotary blade.
The valley portion has at least two ridge portions extending in the radial direction from the outer peripheral end to the inner peripheral end.
The two ridges have a diaphragm shape that approaches from the outer peripheral end toward the inner peripheral end.
A washing machine characterized in that the bottom portion between the two protrusions has a gently curved surface from the outer peripheral end to the inner peripheral end.
The washing machine according to claim 1.
A washing machine characterized in that the two ridges have an inclined portion that descends toward the bottom on the side facing each other.
The washing machine according to claim 1.
A washing machine characterized in that the height of the inner peripheral end of the ridge portion is higher than the lowest point of the ridge portion connecting the outer peripheral end and the inner peripheral end.
The washing machine according to claim 1.
The raised portion is formed at a position higher than the highest position of the intermediate portion.
The valley portion is formed at a position lower than the lowest position of the intermediate portion.
The raised portion has a convex inclined surface and has a convex inclined surface.
The valley portion has a concave inclined surface and has a concave inclined surface.
The intermediate portion has an inclined surface and is continuously connected to the valley portion and the raised portion.
A washing machine characterized in that the inclination angle of the inclined surface of the intermediate portion on the raised portion side is larger than the inclination angle on the valley side.
The washing tub and
The rotary wing provided at the bottom of the washing tub and
An outer tub that contains the washing tub and stores washing water,
It has a drive unit for rotationally driving the washing tub and the rotary blade.
The rotorcraft has an intermediate portion, a valley portion provided at a position lower than the lowest position of the intermediate portion, and a raised portion provided at a position higher than the highest position of the intermediate portion.
The raised portion has a convex inclined surface and has a convex inclined surface.
The valley portion has a concave inclined surface and has a concave inclined surface.
The intermediate portion has an inclined surface and is continuously connected between the valley portion and the raised portion.
A washing machine characterized in that the inclination angle of the inclined surface of the intermediate portion on the raised portion side is larger than the inclination angle on the valley side.
The washing machine according to claim 5.
A washing machine characterized in that the upper portion of the convex inclined surface is formed so as to gradually increase from the central portion of the rotary blade toward the outer diameter side.
The washing machine according to claim 5.
A plurality of through holes are provided in the valley portion and the intermediate portion.
A washing machine characterized in that the raised portion is not provided with a through hole.
The washing machine according to claim 5.
The valley portion is a washing machine characterized by having a plurality of ridge portions.
The washing machine according to claim 1 or 5.
The inclination angle θ1 on the valley side of the intermediate portion is 30 ° ≦ θ1 ≦ 40 °.
A washing machine characterized in that the inclination angle θ2 on the raised portion side of the intermediate portion is 40 ° <θ2 ≦ 60 °.
A rotary wing board for a washing machine that discharges dry air from the top of the washing tub.
The upper surface has a plurality of ridges, a plurality of valleys, and an intermediate portion provided between the ridges and the valleys, and the valleys are directed from the outer peripheral end to the inner peripheral end. Has at least two radial protrusions,
The two ridges have a diaphragm shape that approaches from the outer peripheral end toward the inner peripheral end.
A rotorcraft characterized in that the bottom portion between the two protrusions has a gently curved surface from the outer peripheral end to the inner peripheral end.
It has an intermediate portion, a valley portion provided at a position lower than the lowest position of the intermediate portion, and a raised portion provided at a position higher than the highest position of the intermediate portion.
The raised portion has a convex inclined surface and has a convex inclined surface.
The valley portion has a concave inclined surface and has a concave inclined surface.
The intermediate portion has an inclined surface and is continuously connected between the valley portion and the raised portion.
A rotorcraft characterized in that the inclination angle of the inclined surface of the intermediate portion on the raised portion side is larger than the inclination angle on the valley side.