JP2021074104A - Washing machine - Google Patents

Abstract

To provide a washing machine capable of properly maintaining adjustment water supplied from a water transmission gutter inside a baffle and thereby properly carrying out elimination of an unbalanced state of a dewatering tub.SOLUTION: A washing machine 1 comprises a dewatering tub 2 having a pulsator 4 arranged at a bottom part 2c, a baffle 8 comprising three water pipe parts that are arranged at equal intervals in a circumferential direction with respect to an inner peripheral surface 2a1 of the dewatering tub 2 and opened in the vicinity of the bottom part 2c and having a circulation water port 80 formed on an upper end part, a water receiving ring unit 5 which is fixed to an upper end part of the dewatering tub 2 and in which three annular water transmission gutters 5a, 5b, 5c respectively connected to an upper end part of the baffle 8 comprising water pipe parts, are mutually layered in a radial direction, and a nozzle unit 30 capable of individually pouring adjustment water to each of the water transmission gutters 5a, 5b, 5c. A water receiving plate 85 protruding inward in the radial direction from an outer peripheral side wall is formed inside the baffle 8.SELECTED DRAWING: Figure 2

Description

The present invention relates to a washing machine capable of eliminating the imbalance of the dehydration tub while continuing the rotation of the dehydration tub and suppressing vibration and noise due to eccentricity of the laundry during dehydration.

In a general washing machine installed in a general household or a coin laundry, the laundry is unevenly distributed in the dehydration tub during dehydration, and vibration and noise are generated. Further, if the bias of the laundry at that time is large, the amplitude of the dehydration tub during rotation becomes large and the vibration becomes large, so that the dehydration operation cannot be started.

Therefore, in Patent Document 1, an unbalanced amount and an unbalanced position of clothes in the washing tub are detected at the time of dehydration, and if there is an imbalance, a plurality of baffles evenly provided in the circumferential direction of the dehydration tub are provided. A technique for positively eliminating the unbalanced state of the dehydration tank by injecting water is disclosed.

JP-A-2017-56025

In the washing machine of Patent Document 1, water is injected into the baffle via a water receiving ring unit fixed to the upper end of the inner peripheral surface of the dehydration tub. The water receiving ring unit has three water guiding gutters in which three layers are layered in the radial direction, and the adjusting water is supplied to one of the baffles from each of the three water guiding gutters. In this washing machine, when the adjusting water of each of the three baffles is supplied from the three water guides of the water receiving ring unit, it may not be possible to properly hold the adjusting water inside the baffle. In that case, it is not possible to properly control the unbalanced state of the dehydration tank.

Therefore, the present invention can provide a washing machine capable of more appropriately controlling the unbalanced state of the dehydration tub even if the laundry is unevenly distributed in the washing tub during the dehydration step.

In the washing machine according to the present invention, the dehydration tub in which the pulsator is arranged at the bottom and the dehydration tub are arranged at equal intervals in the circumferential direction with respect to the inner peripheral surface of the dehydration tub, and are opened near the bottom and at the upper end. Three or more water pipes having a circulating water port and three or more annular water gutters fixed to the upper end of the dehydration tank and connected to the upper end of the water pipe are radially connected to each other. A water receiving ring unit formed of layers and a nozzle unit capable of individually injecting adjusted water into each water pipe are provided, and water protruding inward in the radial direction from the outer peripheral side wall thereof is provided inside the water pipe portion. It is characterized in that a receiving plate is formed.

In the washing machine according to the present invention, the inner peripheral side wall of the water pipe portion has a protruding wall portion protruding inward in the radial direction, and the radial inner end portion of the water receiving plate is the protruding wall portion. It is preferable to be arranged inside.

In the washing machine according to the present invention, the water flow pipe portion is arranged above the water receiving plate and is arranged below the water receiving plate and the water storage space for storing the adjusted water from the water guide. It has a drainage space for draining the regulated water flowing out of the space, and it is preferable that the volume of the water storage space is larger than the volume of the drainage space.

In the washing machine according to the present invention, it is preferable that the circumferential length of the drainage space is shorter than the circumferential length of the water storage space.

In the washing machine according to the present invention, when the rotation speed of the dehydration tub exceeds the resonance rotation speed, the center of gravity of the adjusting water stored in the water storage space is located at the upper part of the dehydration tub or at the center in the height direction. Is preferable.

According to the present invention, since the water receiving plate is formed inside the water pipe portion, the regulated water supplied from the water guide can be properly held inside the water pipe portion. As a result, control for eliminating the unbalanced state of the dehydration tank can be appropriately performed.

According to the present invention, by extending the water receiving plate from the outer peripheral side wall of the water pipe portion to the inside of the protruding wall portion, the adjusting water supplied from the water conduit portion of the water pipe portion can be used even when the dehydration tank is rotating at a low speed. Can be held inside.

According to the present invention, by making the volume of the water storage space larger than the volume of the drainage space, it is possible to properly control to supply the adjusting water to the inside of the water pipe portion and eliminate the unbalanced state of the dehydration tank. it can.

According to the present invention, the accommodation space in the dehydration tank can be increased by making the circumferential length of the drainage space shorter than the circumferential length of the water storage space.

According to the present invention, even when the eccentric load is located at the upper part of the dehydration tank or at the center in the height direction, the rotation speed of the dehydration tank can be accelerated so as to exceed the resonance rotation speed.

It is a perspective view which shows the appearance of the washing machine 1 which concerns on embodiment of this invention. It is a schematic diagram which shows the structure of the washing machine 1 of FIG. FIG. 3 is a plan view of a part of the washing machine 1 of FIG. 1 as viewed from above. It is a cross-sectional view of the dehydration tub 2 which the washing machine 1 of FIG. 1 has. It is a partial vertical sectional view of the washing machine 1 of FIG. 6 (a) is a _{cross-sectional view taken along the line a 1-} a ₁ of FIG. 3, FIG. 6 (b) is a cross-sectional view taken along the line _{a 2-} a _{2 of FIG.} is a cross-sectional view of _a 3 -a ₃ line in FIG. FIG. 7 (a) is a view of the baffle 8 formed on the inner peripheral surface 2a1 of the dehydration tank 2 as viewed from the inner peripheral side, and FIG. 7 (b) is the line a1-a1 of FIG. 7 (a). It is a cross-sectional view. FIG. 8 (a) is a diagram showing the resultant force of gravity and centrifugal force acting on the water surface, and FIG. 8 (b) shows changes in the water surface angle when the rotation speed of the dehydration tank 2 is variously changed. Shown. It is an electric block diagram of the washing machine 1 of FIG. The flowchart which shows the flow of control in the dehydration process of the washing machine 1 of FIG. The flowchart which shows the flow of control in the dehydration process of the washing machine 1 of FIG. The figure for demonstrating the flow of control in the dehydration process of the washing machine 1 of FIG.

Hereinafter, the washing machine 1 according to the embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of a vertical washing machine (hereinafter, referred to as “washing machine”) 1 according to the embodiment of the present invention. FIG. 2 is a schematic view showing the configuration of the washing machine 1 of the present embodiment. FIG. 3 is a plan view of a part of the washing machine 1 of the present embodiment as viewed from above. FIG. 4 is a cross-sectional view of the dehydration tub 2 included in the washing machine 1. FIG. 5 is a partial vertical sectional view of the washing machine 1 of the present embodiment.

The washing machine 1 of the present embodiment includes a washing machine main body 1a, a dehydration tub 2, an outer tub 3, a water receiving ring unit 5, a nozzle unit 30, a drive unit 50, and a control means 60 (see FIG. 9). And.

The washing machine main body 1a shown in FIG. 1 has a substantially rectangular parallelepiped shape. On the upper surface of the washing machine main body 1a, an opening 11 for putting in and taking out laundry is formed in the dehydration tub 2, and an opening / closing lid 11a capable of opening and closing the opening 11 is attached.

The outer tub 3 is a bottomed tubular member arranged inside the washing machine main body 1a, and can store washing water inside. As shown in FIG. 2, an acceleration sensor 56 capable of detecting acceleration in three directions of the left-right direction, the up-down direction, and the front-rear direction is attached to the outer peripheral surface 3a of the outer tank 3.

The dehydration tank 2 is a bottomed tubular member that is arranged coaxially with the outer tank 3 in the outer tank 3 and is rotatably supported. The dehydration tub 2 can accommodate laundry inside, and has a large number of water passage holes on its wall surface 2a.

A pulsator (stirring blade) 4 is rotatably arranged at the center of the bottom 2c of the dehydration tank 2. As shown in FIG. 2, the pulsator 4 includes a substantially disk-shaped pulsator main body 4a, a plurality of upper blade portions 4b formed on the upper surface of the pulsator main body 4a, and a plurality of lower blades formed on the lower surface of the pulsator main body 4a. It has a part 4c. Such a pulsator 4 agitates the washing water stored in the outer tub 3 to generate a water flow.

As shown in FIG. 4, three baffles (water injection pipes) 8 as water pipes are provided on the inner peripheral surface 2a1 of the dehydration tank 2 at equal intervals (equal angles) in the circumferential direction. Each baffle 8 extends in the vertical direction from the bottom 2c of the dehydration tank 2 to the upper end, and is formed so as to project from the inner peripheral surface 2a1 of the dehydration tank 2 toward the axis S1. Further, each baffle 8 is hollow and has an arcuate cross-sectional shape. As described above, the shape of the baffle 8 is such that the protrusion of the dehydration tank 2 to the axis S1 is small and the baffle 8 spreads along the circumferential direction of the dehydration tank 2, thereby suppressing the narrowing of the accommodation space of the dehydration tank 2. it can.

As shown in FIG. 2, a horizontally long circulation water port 80 is formed at the upper end of such a baffle 8. Further, at the lower end of the baffle 8, an opening 81 that opens in the vicinity of the bottom 2c of the dehydration tank 2, more specifically below the pulsator main body 4a, is formed.

Therefore, in the washing step in which the drain valve 10a (see FIG. 2) is closed and the washing water is stored in the outer tub 3, the lower blade portion 4c of the pulsator 4 stirs as shown by the arrow in FIG. The washed water is infiltrated through the opening 81, rises inside the baffle 8, is discharged from the circulating water port 80, and the clothes are shower-washed. Further, by repeating this operation, the washing water circulates in the dehydration tub 2. That is, the baffle 8 has a function of circulating washing water.

A partition 8a extending from the circulation water port 80 to a position close to the inner peripheral surface 2a1 of the dehydration tank 2 is provided in the vicinity of the upper end of the baffle 8. The section 8a extends radially outward from the upper edge of the circulating water port 80 and then curves downward. A gap 8b (see FIG. 2) is formed between the partition 8a and the inner peripheral surface 2a1 of the dehydration tank 2, and the adjusting water supplied from the water receiving ring unit 5 passes through the gap 8b. It flows downward.

As shown in FIGS. 3 and 5, the water receiving ring unit 5 has three layers of annular water gutters 5a, 5b, and 5c opened upward in the radial direction toward the axis S1 of the dehydration tank 2. As shown in FIG. 2, it is fixed to the upper end of the inner peripheral surface 2a1 of the dehydration tank 2. The number of water guide gutters 5a, 5b, and 5c is the same as that of the baffle 8, and the water guides 5a, 5b, and 5c are formed so that the adjusting water can flow to any of the baffles 8 independently.

As shown in FIG. 5, the upper ends of the water guides 5a, 5b, 5c are arranged at substantially the same height, and the depths of the water guides 5a, 5b, 5c are different from each other. That is, the water guide gutters 5a, 5b, 5c is towards the inner peripheral side from the outer side, deep depth _{n a} of the water guide gutters 5a, depth _{n b} of the water guide gutters 5b, in order of depth _{n c} of the water guide gutters 5c Become. _{Therefore, the bottom surfaces 5 ta} , 5 _tb , and 5 _tc of the gutters 5a, 5b, and 5c are arranged at different heights, and the bottom surface 5 _{ta of the} gutter 5a is arranged at the highest position, from the outer peripheral side to the inner side. _{The bottom surface 5 tb of} the water guide gutter 5b and the bottom _{surface 5 tc} of the water guide gutter 5c are arranged at lower positions in this order toward the circumferential side.

The water guides 5a, 5b, and 5c have a width (diameter length) t _{a1 of} the water guide 5a, a width (diameter length) t _b1 , and a protrusion 6c of the water guide 5a from the outer peripheral side to the inner peripheral side. Width (length in the radial direction) t _c1 becomes shorter in this order.

As shown in FIG. 5, the upper ends of the water guides 5a, 5b, and 5c have protrusions 6a, 6b, and 6c that protrude inward in the radial direction from the outer peripheral wall thereof. The protrusions 6a, 6b, 6c are formed over the entire circumference of the water guide gutters 5a, 5b, 5c. Radial length of the protruding portions 6a, 6b, 6c are identical over the entire periphery, towards from the outer periphery to the inner periphery, the radial length t _a2, radial length of the projecting portion 6b of the protruding portion 6a The length becomes shorter in the order of _{t b2} and the radial length t _{c2 of the protruding portion 6c.}

If the adjusting water is injected into the water guides 5a, 5b, 5c while the dehydration tank 2 is rotating, the adjusting water will stick to the outer wall of the water guides 5a, 5b, 5c due to centrifugal force. At that time, since the protrusions 6a, 6b, 6c are formed at the upper ends of the water guides 5a, 5b, 5c, it is possible to prevent the adjusting water from splashing from the inside of the water guides 5a, 5b, 5c to the outside.

The protrusion 6c of the water guide 5c is formed to be the shortest, but since the depth of the water guide 5c is the deepest, the adjusting water has a thin thickness over a wide range of the outer peripheral wall below the protrusion 6c of the water guide 5c. Stick. On the other hand, the protrusions 6a and 6b of the water guides 5a and 5b are formed longer than the protrusions 6c of the water guide 5c, but the depth of the water guides 5a and 5b is deeper than that of the water guide 5c. Therefore, below the protrusions 6a and 6b of the gutters 5a and 5b, the adjusting water sticks to a small area of the outer peripheral wall with a thick thickness. As a result, the dehydration tank 2 can rotate in a state where substantially the same amount of adjusting water is held inside the water guides 5a, 5b, 5c in any of the water guides 5a, 5b, 5c.

As shown in FIG. 5, since the protrusions 6a, 6b, 6c are formed at the upper ends of the water guides 5a, 5b, 5c, the protrusions 6a, 6b are formed at the upper ends of the water guides 5a, 5b, 5c. , 6c are formed with annular openings 35a, 35b, 35c arranged on the inner side in the radial direction, respectively. Therefore, the water injection nozzles 30a, 30b, 30c inject the adjusting water into the water guides 5a, 5b, 5c from the openings 35a, 35b, 35c formed at the upper ends of the water guides 5a, 5b, 5c. In the present embodiment, the widths (diameter lengths) of the openings 35a, 35b, 35c formed at the upper ends of the water guides 5a, 5b, 5c are formed to be the same. For the width of the openings 35a, 35b, 35c, for example, considering the diameters of the water injection nozzles 30a, 30b, 30c, the adjusted water from the water injection nozzles 30a, 30b, 30c is properly injected into the water guides 5a, 5b, 5c. It is set to be done.

As shown in FIGS. 3 and 6 (a), an opening 5A is formed at the lower end of the water gutter 5a so as to open outward in the radial direction, and the water gutter 5a and the inside of the baffle 8 communicate with each other. ing.

Further, as shown in FIGS. 3 and 6 (b), an opening 5B that opens outward in the radial direction is formed at the lower end of the water guide 5b, and water passes under the water guide 5a. The water guide gutter 5b and the inside of the baffle 8 communicate with each other via the path 5Ba. The water flow path 5Ba extends horizontally and radially outward from the opening 5B.

Further, as shown in FIGS. 3 and 6 (c), an opening 5C is formed at the lower end of the water guide 5c so as to open outward in the radial direction, and the lower portion of the water guide 5a and the water guide 5b is formed. The water guide gutter 5c and the inside of the baffle 8 communicate with each other via the passing water passage 5Ca. The water flow path 5Ca extends horizontally and radially outward from the opening 5C.

An annular fluid balancer 12 is attached to the outer peripheral side of the water receiving ring unit 5. The fluid balancer 12 is similar to a known fluid balancer.

FIG. 7 (a) is a view of the baffle 8 formed on the inner peripheral surface 2a 1 of the dehydration tank 2 as viewed from the inner peripheral side, and FIG. 7 (b) is a view of a ₁ −a _{1 of FIG. 7 (a).} It is sectional drawing in the line.

As shown in FIG. 7B, a projecting wall portion 82 projecting inward in the radial direction is provided near the lower end of the inner peripheral side wall of the baffle 8. That is, a part of the inner peripheral side wall of the baffle 8 projects inward in the radial direction. As shown in FIGS. 7 (a) and 7 (b), a water receiving plate 85 is formed inside the baffle 8 so as to project radially inward from the outer peripheral side wall thereof. The water receiving plate 85 is arranged at the same height as the protruding wall portion 82, and the radial inner end portion 85a of the water receiving plate 85 is arranged inside the protruding wall portion 82. A gap is formed between the radial inner end portion 85a of the water receiving plate 85 and the tip inner peripheral surface of the protruding wall portion 82, and the adjusting water supplied to the water storage space 8a passes through the gap. It flows into the drainage space 8b.

The internal space of the baffle 8 has a water storage space 8a arranged above the protruding wall portion 82 on which the water receiving plate 85 is arranged, and a drainage space 8b arranged below the protruding wall portion 82. The water storage space 8a is a space for storing the regulated water from the water guides 5a, 5b, 5c, and the drainage space 8b is a space for draining the regulated water flowing out from the water storage space 8a. As shown in FIGS. 7 (a) and 7 (b), the radial thickness of the water storage space 8a and the radial thickness of the drainage space 8b are substantially the same, whereas the vertical length of the drainage space 8b is It is shorter than the vertical length of the water storage space 8a, and the circumferential length of the drainage space 8b is shorter than the circumferential length of the water storage space 8a. Therefore, the volume of the water storage space 8a is larger than the volume of the drainage space 8b.

The adjusting water injected into the water storage space 8a of the baffle 8 is held by the water receiving plate 85 arranged in the protruding wall portion 82 so as not to flow downward, and the protruding wall portion 82 is held along the upper surface of the water receiving plate 85. It flows inward in the radial direction. When the adjusting water is injected into the water storage space 8a of the baffle 8 while the dehydration tank 2 is rotated, the adjusting water sticks to the outer peripheral walls of the water guides 5a, 5b, 5c due to centrifugal force, so that the adjusting water is stored in the water storage space 8a. It is held inside.

FIG. 8A is a diagram showing the resultant force of gravity and centrifugal force acting on the water surface in the headrace. In FIG. 8, when the angle θ (water surface angle θ) with respect to the horizon of the water surface is, the gravity acting on the water surface is mg, the centrifugal force is mrω ² , and tan θ = mrω ² / mg.

FIG. 8B shows the change in the water surface angle when the rotation speed of the dehydration tank 2 is variously changed. However, the radius of the dehydration tank 2 is 0.24 (m). For example, when the rotation speed of the dehydration tank 2 is 100 rpm, the angular velocity ω is 10.5. At that time, ^{the value of rω 2} is 26.3, and if the gravitational acceleration g is 9.8 m / s ² , the water surface angle θ is 69.58 degrees.

The water surface angle θ of the adjusted water in the water storage space when the dehydration tank 2 is rotating changes according to the rotation speed of the dehydration tank 2. That is, as shown in FIG. 8B, when the rotation speed of the dehydration tank 2 is small, the centrifugal force is small, so that the water surface angle θ is relatively small, and when the rotation speed of the dehydration tank 2 is large, the centrifugal force is high. Since it is large, the water surface angle θ is relatively large.

In the present embodiment, the position (vertical height) and radial length of the water receiving plate 85 are adjusted so that water is stored above the water receiving plate 85 when the rotation speed of the dehydration tank 2 exceeds the resonance rotation speed. The center of gravity of the water is set to be substantially at the same height as the center in the height direction of the dehydration tank 2 (the center in the height direction of the dehydration tank 2).

For example, FIG. 7B shows the water surface at 200 rpm, which is the resonance rotation speed, and the center of gravity of the adjusting water stored above the water receiving plate 85 of the baffle 8 at that time is the dehydration tank 2. It is set to be at the same height as the center in the height direction of. In FIG. 7B, when the amount of the adjusting water stored above the water receiving plate 85 of the baffle 8 is derived, the adjusting water is not stored radially inside the storage space 8a, so that the amount of water is not stored. Is deducted.

The nozzle unit 30 individually injects adjusting water into such water guides 5a, 5b, and 5c. The nozzle unit 30 includes three water injection nozzles 30a, 30b, 30c arranged above the water guides 5a, 5b, 5c, and water supply valves 31a, 31b, respectively connected to these water injection nozzles 30a, 30b, 30c. It has 31c and. The water injection nozzles 30a, 30b, 30c are provided in the same number as the water guides 5a, 5b, 5c, and are attached to the upper end of the outer tank 3 at positions where water can be injected into the separate water guides 5a, 5b, 5c. In this embodiment, tap water is used as the adjusting water. Further, as the water supply valves 31a, 31b and 31c, it is also possible to adopt a direction switching water supply valve.

With such a configuration, in the dehydration step in which the drain valve 10a is opened and the washing water in the outer tub 3 is discharged from the drain port 10, the water injection nozzles 30a, 30b, 30c of the nozzle unit 30 receive the water. The adjusting water injected into the water guides 5a, 5b, 5c of the water ring unit 5 flows into the baffle 8.

For example, when the adjusting water is injected from the water injection nozzle 30a, as shown by the arrow in FIG. 6A, the adjusting water flows from the water guide gutter 5a through the opening 5A into the baffle 8a. Similarly, when the adjusting water is injected from the water injection nozzle 30b, as shown by the arrow in FIG. 6B, the adjusting water flows from the water guide gutter 5b into the baffle 8b through the water flow path 5Ba and the opening 5B. .. When the adjusting water is injected from the water injection nozzle 30c, as shown by the arrow in FIG. 6C, the adjusting water flows from the water guide 5c into the baffle 8c through the water passage 5Ca and the opening 5C.

When the dehydration tank 2 is in a high-speed rotation state, the adjusting water that has flowed into the baffle 8 sticks to the inner peripheral surface 2a1 of the dehydration tank 2 due to centrifugal force and stays there. As a result, the weight of the baffle 8 increases and the balance of the dehydration tank 2 changes. As described above, the baffle 8 has a pocket baffle structure capable of storing adjusted water by centrifugal force. Then, when the dehydration step is nearing the end and the rotation speed of the dehydration tank 2 decreases, the centrifugal force in the baffle 8 gradually attenuates, and the adjusting water flows out from the opening 81 due to gravity and passes through the drain pipe 10 to the outer tank. 3 It is drained to the outside. At this time, the adjusting water flows below the pulsator main body 4a through the opening 81. Therefore, the adjusting water is drained without wetting the clothes above the pulsator body 4a.

The drive unit 50 shown in FIG. 2 is driven by the dehydration tank 2 and the pulsator 4 by rotating the pulley 52 and the belt 53 by the motor 51 and rotating the drive shaft 54 extending toward the bottom 2c of the dehydration tank 2. A force is applied to rotate the dehydration tank 2 and the pulsator 4. The washing machine 1 mainly rotates only the pulsator 4 in the washing step, and integrally rotates the dehydration tub 2 and the pulsator 4 at high speed in the dehydration step. Further, in the vicinity of one of the pulleys 53, a proximity switch 55 capable of detecting the passage of the mark 52a formed on the pulley 52 is provided.

As described above, in the washing machine 1 of the present embodiment, the pulsator 4 is arranged at equal intervals in the circumferential direction with respect to the dehydration tub 2 in which the pulsator 4 is arranged in the bottom 2c and the inner peripheral surface 2a1 of the dehydration tub 2, and the bottom 2c. The baffle 8 is three water pipes that are opened in the vicinity and the circulation water port 80 is formed at the upper end, and the baffle 8 is fixed to the upper end of the dehydration tank 2 and is connected to the upper end of the baffle 8 that is the water pipe. A water receiving ring unit 5 in which three annular water pipes 5a, 5b, and 5c are laminated in the radial direction, and a nozzle unit 30 capable of individually injecting adjusted water into each water pipe 5a, 5b, 5c. A water receiving plate 85 is formed inside the baffle 8 so as to project inward in the radial direction from the outer peripheral side wall thereof.

With such a configuration, since the water receiving plate 85 is formed inside the baffle 8, the adjusting water supplied from the water guides 5a, 5b, and 5c can be appropriately held inside the baffle 8. .. Thereby, the control for eliminating the unbalanced state of the dehydration tank 2 can be appropriately performed.

As described above, in the washing machine 1 of the present embodiment, the inner peripheral side wall of the baffle 8 which is the water pipe portion has a protruding wall portion 82 protruding inward in the radial direction, and the radial inner end of the water receiving plate 85. The portion is arranged inside the protruding wall portion 82.

With such a configuration, the water receiving plate 85 is extended from the outer peripheral side wall of the baffle 8 to the inside of the protruding wall portion 82, so that the water receiving plate 85 is supplied from the water guides 5a, 5b, 5c even at a low speed rotation of the dehydration tank 2. The prepared water can be retained inside the baffle 8.

As described above, in the washing machine 1 of the present embodiment, the baffle 8 which is the water passage pipe portion is arranged above the water receiving plate 85, and is located above the water storage space 8a for storing the adjusted water from the baffle 8 and the water receiving plate 85. It is arranged below and has a drainage space 8b for draining the regulated water flowing out from the water storage space 8a, and the volume of the water storage space 8a is larger than the volume of the drainage space 8b.

With such a configuration, by making the volume of the water storage space 8a larger than the volume of the drainage space 8b, the adjusting water is supplied to the inside of the baffle 8 and the control for eliminating the unbalanced state of the dehydration tank 2 is appropriate. Can be done.

As described above, in the washing machine 1 of the present embodiment, the circumferential length of the drainage space 8b is shorter than the circumferential length of the water storage space 8a.

With such a configuration, the accommodation space in the dehydration tank 2 can be increased by making the circumferential length of the drainage space 8b shorter than the circumferential length of the water storage space 8a.

As described above, in the washing machine 1 of the present embodiment, when the rotation speed of the dehydration tub 2 exceeds the resonance rotation speed, the center of gravity of the adjusting water stored in the water storage space 8a is located at the center of the dehydration tub 2 in the height direction. is there.

With such a configuration, even when the eccentric load is in the upper part of the dehydration tank 2 or in the central portion in the height direction, the rotation speed of the dehydration tank 2 can be accelerated so as to exceed the resonance rotation speed.

FIG. 9 is a block diagram showing an electrical configuration of the washing machine 1 of the present embodiment. The operation of the washing machine 1 is controlled by a control means 60 including a microcomputer. The control means 60 includes a central control unit (CPU) 61 that controls the entire system, and the control means 60 has a low-speed rotation set value (N1) before the start of the dehydration operation, which is necessary for controlling the rotation of the dehydration tank 2, and a dehydration operation. A memory 62 that stores the high-speed rotation set value (N2) after the start, the unbalanced amount set value (ma) during the low-speed dehydration operation, and the unbalanced amount set value (mb) during the high-speed dehydration operation is connected. Further, when the microcomputer executes the program stored in the memory 62 by the control means 60, a predetermined operation operation is performed, and the memory 62 contains data and the like used when executing the program. Is temporarily memorized.

The central control unit 61 outputs a control signal to the rotation speed control unit 63, and further outputs the control signal to the motor control unit (motor control circuit) 64 to control the rotation of the motor 51. The rotation speed control unit 63 inputs a signal indicating the rotation speed of the motor 51 from the motor control unit 64 in real time to serve as a control element. The acceleration sensor 56 is connected to the unbalanced amount detection unit 55, and the acceleration sensor 51 and the proximity switch 55 are connected to the unbalanced position detection unit 66.

As a result, when the proximity switch 55 detects the marker 52a (see FIG. 2), the unbalanced amount (M) is calculated by the unbalanced amount detecting unit 65 from the magnitude of the acceleration in the horizontal and vertical directions from the acceleration sensor 56. Then, this unbalanced amount is output to the unbalanced amount determination unit 67. The unbalanced position detection unit 66 calculates the angle in the unbalanced direction from the signal indicating the position of the marker 52a input from the proximity switch 55, and outputs the unbalanced position signal to the water injection control unit 68.

When a signal indicating the unbalance amount and the unbalance position is input from the unbalance amount determination unit 67 and the unbalance position detection unit 66, the water injection control unit 68 supplies water to any baffle 8 in the dehydration tank 2. The amount of water supplied is determined based on the control program stored in advance. Then, the selected water supply valves 31a, 31b, and 31c are opened, and the injection of the adjusting water is started. When an imbalance occurs in the dehydration tank 2, the adjusted water is injected from the water injection nozzles 30a, 30b, 30c selected based on the calculation of the unbalance amount into the water guides 5a, 5b, 5c of the water receiving ring unit 5. When the imbalance is resolved by the baffle 8, the injection of the adjusting water is stopped.

In the water injection control unit 68, for example, as shown in FIG. 4, when the laundry mass D (X) causing the imbalance is between the baffle 8a and the baffle 8c of the dehydration tank 2, the baffle It is controlled to supply the adjusting water to 8b. Further, when the laundry mass D (Y) is in the vicinity of the baffle 8b, control is performed so that the adjusting water is supplied to both the baffle 8a and the baffle 8c.

10 and 11 are flowcharts showing the control of the washing machine 1 of the present embodiment.

In the present embodiment, when the central control unit 61 receives an input signal from a dehydration button (not shown) or a signal that the dehydration step should be started during the washing course operation, the process proceeds to step SP1 and the dehydration step is started.

<Step SP1>
In step SP1, the central control unit 61 loosens and inverts the dehydration tank 2 and then accelerates the rotation of the dehydration tank 2.

<Step SP2>
In step SP2, the central control unit 61 rotates the dehydration tank 2 at a low speed based on the low speed rotation set value (N1).

<Step SP3>
In step SP3, the central control unit 61 detects the unbalanced amount (M) based on the acceleration value (x component of the acceleration sensor) given by the acceleration sensor 56.

<Step SP4>
In step SP4, the central control unit 61 compares the unbalanced amount (M) with the unbalanced amount set value (ma) stored in the memory 62, and determines whether or not M <ma holds. If it is determined that M <ma holds, the process proceeds to step SP6. On the other hand, if it is determined that M <ma does not hold, the process proceeds to step SP5. Here, the unbalance amount set value (ma) is a threshold value indicating that the bias of the laundry is so large that it is difficult to eliminate it even if the adjusting water is supplied to the baffle 8. That is, when proceeding to step SP5, it means that it is determined that the bias of the laundry is large enough to be difficult to eliminate even if the adjusting water is supplied to the baffle 8.

<Step SP5>
In step SP5, the central control unit 61 stops the rotation of the dehydration tank 2, then returns to step SP1 and repeats steps S1 to S4.

<Step SP6>
In step SP6, if the central control unit 61 determines that the elapsed time from the start of low-speed rotation of the dehydration tank 2 is equal to or longer than a predetermined set time for performing the low-speed rotation process, the process proceeds to step SP7.

<Step SP7>
In step SP7, the central control unit 61 rotates the dehydration tank 2 at high speed based on the high-speed rotation set value (N2).

<Step SP8>
In step SP8, the central control unit 61 detects the unbalanced amount (M) and the unbalanced position (N) based on the acceleration value given by the acceleration sensor 56.

<Step SP9>
In step SP9, the central control unit 61 replaces the water supply valve X, the region Y, and the water supply valve Z shown in FIG. 12 with the values in the parameter table based on the unbalanced position (N). FIG. 12 is a diagram for explaining a flow of control in the dehydration step of the washing machine 1. FIG. 12 also schematically shows the positional relationship with the baffle 8 by dividing the cross section of the dehydration tank 2 into six equal parts in the circumferential direction, and the baffle 8 described as 8 (A) is shown in FIG. Represents the baffle 8 to which the adjusting water is supplied from the water injection nozzle 31a shown in 1. Similarly, the baffle 8 described as 8 (B) is supplied with the adjusting water from the water injection nozzle 31b shown in FIG. 2, and the baffle 8 described as 8 (C) is supplied with the adjusting water from the water injection nozzle 31c shown in FIG. Represents the baffle 8 to be made.

<Step SP10>
In step SP10, the central control unit 61 opens the water supply valve X described in the parameter table of FIG. For example, when the unbalanced position (N) is the region I, the water supply valve X becomes the water supply valve 31c corresponding to the baffle 8 (C) facing the region I. As a result, the adjusting water is supplied to the baffle 8 corresponding to the water supply valve X, and the amount and position of the eccentric load change.

<Step SP11>
In step SP11 shown in FIG. 11, the central control unit 61 recalculates the unbalanced amount (M) and the unbalanced position (N) based on the acceleration value given by the acceleration sensor 56.

<Step SP12>
In step SP12, the central control unit 61 compares the unbalanced amount (M) with the unbalanced amount set value (ma) stored in the memory 62, and determines whether or not M <ma holds. If it is determined that M <ma holds, the process proceeds to step SP13. On the other hand, if it is determined that M <ma does not hold, the process proceeds to step SP21 described later. That is, if it is determined that the bias of the laundry is large enough to be difficult to eliminate even if the adjusting water is supplied to the baffle 8, the process proceeds to step SP21.

<Step SP13>
In step SP13, the central control unit 61 compares the unbalance amount (M) with the unbalance amount set value (mb) stored in the memory 62, and determines whether or not M <mb holds. If it is determined that M <mb holds, the process proceeds to step SP23, which will be described later. On the other hand, if it is determined that M <mb does not hold, the process proceeds to step SP14. Here, the unbalance amount set value (mb) is a value smaller than the unbalance amount set value (ma), and the laundry is biased to the extent that noise is not generated even if the adjusting water is not supplied to the baffle 8. Is a threshold value indicating that is small. That is, when it is determined that the eccentric load is small or does not exist and noise is not generated even if water is not supplied to the baffle 8, the process proceeds to step SP23.

<Step SP14>
In step SP14, when the central control unit 61 determines that the elapsed time from opening the water supply valve X is equal to or longer than the set time, the process proceeds to step SP15. Here, the set time is the time required until the inside of one baffle 8 is almost filled with the adjusting water.

<Step SP15>
In step SP15, the central control unit 61 determines whether or not the unbalanced position (N) is the region Y shown in the parameter table of FIG. If it is determined that the unbalanced position (N) is the region Y, the process proceeds to step SP16. If it is determined that the unbalanced position (N) is not the region Y, the process returns to step SP11. For example, if the initial unbalanced position (N) in step SP11 is region I, then the unbalanced position (N) remains region I unless recalculation is performed, and the process returns to step SP16. Since the result of the recalculation in step SP16 changes with time due to the water supply from the water supply valve X, when the weight of the baffle 8 corresponding to the water supply valve 26c increases, the unbalanced position (N) changes from the area I to the area V. When the change occurs and step SP15 is repeated a plurality of times, the unbalanced position (N) changes to the region Y.

<Step SP16>
In step SP16, the central control unit 61 closes the water supply valve X described in the parameter table of FIG. 12 and opens the water supply valve Z. For example, when the initial unbalanced position (N) is the region I, the water supply valve X becomes the water supply valve 26c corresponding to the baffle 8 facing the region I, and the water supply valve Z is the baffle 8 corresponding to the water supply valve 26c. The water supply valve 26b corresponds to the baffle 8 (B) located closer to the area I than (C). As a result, the adjusting water is supplied to the baffle 8 corresponding to the water supply valve Z, and the amount and position of the eccentric load change.

<Step SP17>
In step SP17, the central control unit 61 recalculates the unbalanced amount (M) and the unbalanced position (N) based on the acceleration value given by the acceleration sensor 56.

<Step SP18>
In step SP18, the central control unit 61 compares the unbalanced amount (M) with the unbalanced amount set value (ma) stored in the memory 62, and determines whether or not M <ma holds. If it is determined that M <ma holds, the process proceeds to step SP19. On the other hand, if it is determined that M <ma does not hold, the process proceeds to step SP21 described later. That is, if it is determined that the bias of the laundry is large enough to be difficult to eliminate even if the baffle 8 is further supplied with the adjusting water, the process proceeds to step SP21.

<Step SP19>
In step SP19, the central control unit 61 compares the unbalance amount (M) with the unbalance amount set value (mb) stored in the memory 62, and determines whether or not M <mb holds. If it is determined that M <mb holds, the process proceeds to step SP23, which will be described later. That is, when it is determined that the eccentric load is eliminated to the extent that noise is not generated by supplying water to the baffle 8, the process proceeds to step SP23. On the other hand, if it is determined that M <mb does not hold, the process proceeds to step SP20.

<Step SP20>
In step SP20, when the central control unit 61 determines that the elapsed time from opening the water supply valve Z is equal to or longer than the set time, the process proceeds to step SP21 described later. On the other hand, if it is determined that the elapsed time since the water supply valve Z is opened is not equal to or longer than the set time, the process returns to step SP17.

<Step SP21>
In step SP21 shown in FIG. 10, the central control unit 61 closes all the water supply valves X and Z.

<Step SP22>
In step SP22, the central control unit 61 stops the rotation of the dehydration tank 2 and then returns to step SP1.

As described above, when it is determined that the eccentric load is so large that the water supply to the baffle 8 does not eliminate it, the treatment of steps SP21 and 22 is performed, and the dehydration treatment is restarted from the beginning.

<Step SP23>
In step SP23 shown in FIG. 11, the central control unit 61 closes all the water supply valves X and Z.

<Step SP24>
In step SP24, the central control unit 61 rotates the dehydration tank 2 at the maximum rotation speed for a predetermined time to perform the dehydration treatment. After that, the dehydration process is completed.

As described above, in the present embodiment, the clothes cling to the inner peripheral surface 2a1 of the dehydration tank 2 by centrifugal force, and the rotation of the dehydration tank 2 is accelerated to a set rotation lower than the dehydration rotation. At this time, if the clothes are unevenly dispersed in the dehydration tank 2, the unbalance amount (M) causes vibration of a circular orbit in the outer tank 3, and the value of the acceleration sensor 56 is the value of the dehydration tank 2. Draw a sine wave according to the rotation of. Then, the unbalanced amount (M) and the angle from the position of the marker 52a are calculated by the microcomputer from the value of the acceleration sensor 56 when the proximity switch 55 detects the marker 52a, and the detected unbalanced amount (M) is obtained. If it is equal to or more than the set value, water is injected into the baffle 8 at the symmetrical position.

The baffle 8 into which the adjusting water is injected is made different depending on the unbalanced position (N). First, water is supplied only to the baffle 8 which is located farthest from the first detected unbalanced position (N) and has a large influence on the adjustment of the unbalanced amount (M) and the position (N), and then to the baffle 8. When the water supply is completed, water is injected into the second baffle 8 as necessary, taking into consideration the changes in the unbalanced amount (M) and the position (N) due to the water supply. As a result, it is not necessary to consider that a fixed amount of adjusting water is not supplied to each baffle 8 due to the resistance of the wall surfaces of the water guides 5a, 5b, 5c, etc., as in the case of supplying water to a plurality of baffles 8 at the same time. Since it is not necessary to adjust the difference in water supply speed to each baffle 8 by opening and closing the water supply valves 31a, 31b and 31c, the number of times the water supply valves 31a, 31b and 31c are opened and closed can be reduced, and the durability of the water supply valves 31a, 31b and 31c can be reduced. It is possible to suppress the deterioration of sex.

If there is an imbalance due to the unevenness of the laundry at the position D (X) shown in FIG. 4, water is injected into the baffle 8 (A) and the imbalance due to the unevenness of the laundry is at the position D (Y). In some cases, water is injected into the baffle 8 (B) and the baffle 8 (C) while the acceleration sensor 56 monitors the decrease in acceleration and the change in the unbalanced position.

After that, when the unbalance amount becomes equal to or less than the set value, the dehydration tank 2 is accelerated to the high-speed dehydration rotation to perform dehydration. Then, when the dehydration is completed, the deceleration of the dehydration tank 2 is started, and the centrifugal force is lower than the gravitational acceleration, the adjusting water in the baffle 8 flows out below the opening 71 and is drained.

According to the above flow of the dehydration operation, the unbalanced state of the dehydration tank 2 is detected in two stages of low speed rotation and high speed rotation, and the unbalanced state is eliminated. Therefore, from the start to the end of the dehydration operation. The washing machine 1 can prevent the generation of vibration and noise in any process of the throat.

Although the embodiment of the present invention has been described above, the configuration of the present embodiment is not limited to that described above, and various modifications are possible.

For example, in the above embodiment, the water receiving ring unit 5 is composed of three gutters 5a, 5b, and 5c, and three baffles 8 are provided correspondingly, but the present invention is not limited to this, and three or more baffles 8 are provided. It is sufficient that the number of gutters is the same as that of the baffle 8.

In the above embodiment, the inner peripheral side wall of the baffle 8 has a protruding wall portion 82 protruding inward in the radial direction, and the radial inner end portion of the water receiving plate 85 is arranged inside the protruding wall portion 82. , Not limited to that. For example, the inner peripheral side wall of the baffle 8 does not have to have a protruding wall portion 82 protruding inward in the radial direction.

In the above embodiment, an example of the shape of the baffle 8 is shown, but the present invention is not limited thereto. The shape of the baffle 8 is arbitrary, and may be, for example, an upward or downward spread shape depending on the operation (situation) of the washing machine 1.

In the above embodiment, the volume of the water storage space 8a is larger than the volume of the drainage space 8b, but the volume is not limited thereto.

In the above embodiment, the circumferential length of the drainage space 8b is shorter than the circumferential length of the water storage space, but the present invention is not limited to this.

In the above embodiment, an example of the shape of the water receiving plate 85 is shown, but the present invention is not limited thereto. The position (vertical height) and radial length of the water receiving plate 85 are arbitrary.

In the above embodiment, when the rotation speed of the dehydration tank 2 exceeds the resonance rotation speed, the center of gravity of the adjusting water stored above the water receiving plate 85 is the central portion in the height direction of the dehydration tank 2 (the height of the dehydration tank 2). It is at the same height as the center of the vertical direction), but it is not limited to that. When the rotation speed of the dehydration tank 2 exceeds the resonance rotation speed, the effect of the present invention is effective when the center of gravity of the adjusting water stored above the water receiving plate 85 is located at the upper part of the dehydration tank 2 or at the center in the height direction. can get. In the present invention, the upper portion of the dehydration tank 2 is the range from the upper end of the dehydration tank 2 to 1/3 of the height of the dehydration tank 2, and the central portion in the height direction of the dehydration tank 2 is the dehydration tank. The range is from the upper end of 2 to 1 / 3-2 / 3 of the height of the dehydration tank 2. That is, when the upper end to the lower end of the dehydration tank 2 is divided into three equal height ranges, from the upper end of the dehydration tank 2, the upper part of the dehydration tank 2, the central portion of the dehydration tank 2 in the height direction, and the dehydration tank 2 It is divided into three lower areas.

Other configurations can be modified in various ways without departing from the spirit of the present invention.

1 Washing machine 2 Dewatering tub 2c Bottom of dewatering tub 4 Pulsator 5 Water receiving ring units 5a, 5b, 5c Water gutter 8 Baffle (water pipe part)
8a Water storage space 8b Drainage space 30 Nozzle unit 80 Circulation water port 82 Protruding wall part 85 Water receiving plate 85a Radial inner end of water receiving plate

Claims (5)

A dehydration tank with a pulsator located at the bottom,
Three or more water pipes that are arranged at equal intervals in the circumferential direction with respect to the inner peripheral surface of the dehydration tank and that are open near the bottom and have a circulating water port at the upper end.
A water receiving ring unit fixed to the upper end of the dehydration tank and having three or more annular water gutters connected to the upper end of the water pipe portion in a radial direction.
Each water gutter is equipped with a nozzle unit that can individually inject adjusted water.
A washing machine characterized in that a water receiving plate protruding inward in the radial direction from the outer peripheral side wall thereof is formed inside the water pipe portion. The inner peripheral side wall of the water pipe portion has a protruding wall portion protruding inward in the radial direction.
The washing machine according to claim 1, wherein the radial inner end portion of the water receiving plate is arranged inside the protruding wall portion. The water pipe portion
A water storage space that is arranged above the water receiving plate and stores the regulated water from the headrace.
It is arranged below the water receiving plate and has a drainage space for draining the regulated water flowing out of the water storage space.
A washing machine characterized in that the volume of the water storage space is larger than the volume of the drainage space. The washing machine according to claim 3, wherein the circumferential length of the drainage space is shorter than the circumferential length of the water storage space. When the rotation speed of the dehydration tank exceeds the resonance rotation speed, the center of gravity of the adjusting water stored in the water storage space is located at the upper part of the dehydration tank or at the center in the height direction. The washing machine according to any one of 4.

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