WO2023030078A1

WO2023030078A1 - Washing machine

Info

Publication number: WO2023030078A1
Application number: PCT/CN2022/114081
Authority: WO
Inventors: 川口智也; 永井孝之
Original assignee: 青岛海尔洗衣机有限公司; Aqua株式会社; 海尔智家股份有限公司
Priority date: 2021-09-01
Filing date: 2022-08-23
Publication date: 2023-03-09
Also published as: CN117916419A; JP2023035691A

Abstract

Provided in the present invention is a washing machine capable of eliminating the problem of the volume in a water removal drum becoming smaller and the problem of laundry being damaged. The washing machine of the present invention comprises: a water removal drum, which is configured in an outer drum; three or more water injection parts, which are configured on an inner peripheral face of the water removal drum at equal intervals in a circumferential direction; and a water injection device, which can inject adjustment water into the water injection parts, wherein a water injection part (8) is internally provided with: a first water-receiving plate, which is provided at the lower portion of the water removal drum and protrudes from an outer wall part of the water injection part to a radial inner side; and a second water-receiving plate, which is provided at the upper portion of the water removal drum and protrudes from the outer wall part of the water injection part to the radial inner side, the protrusion of the second water-receiving plate being shorter than that of the first water-receiving plate.

Description

washing machine

technical field

The present invention relates to a washing machine capable of suppressing vibration and noise caused by eccentricity of the washing and dehydrating tub during spinning by eliminating imbalance of the washing and dehydrating tub while continuously rotating the washing and dehydrating tub.

Background technique

Conventionally, there is a washing machine having baffles arranged at equal intervals in the circumferential direction on the inner peripheral surface of the washing and dehydrating tub (for example, refer to Patent Document 1). Each baffle is formed to extend in the vertical direction from the bottom to the upper end of the washing and dehydrating tub. An opening opening near the bottom of the washing and dehydrating tub is formed at the lower end of the baffle, and a circulating water port is formed at the upper end of the baffle. Therefore, during the cleaning process, the washing water agitated by the lower blades of the pulsator enters from the opening and climbs up in the baffle, and is spouted from the circulating water port to wash the clothes.

The washing machine usually performs the dehydration process after the washing process. However, if the laundry has a large deviation during dehydration, the eccentricity of the washing and dehydration tub during rotation becomes large, and a large torque is required for rotation, so the dehydration operation cannot be started. Therefore, the following technology is disclosed in Patent Document 1: when dehydrating, the unbalanced amount and unbalanced position of the clothes in the washing and dehydrating tub are detected, and when there is an unbalanced condition, the clothes are evenly arranged along the circumferential direction of the washing and dehydrating tub. Multiple baffles are flooded to actively eliminate imbalances in the washer spin tub.

In the washing machine of Patent Document 1, the baffle is formed to protrude inwardly from the inner peripheral surface of the washing and dehydrating tub, and also functions as a water injection pipe for adjusting water injection so as to eliminate the unbalanced state of the washing and dehydrating tub. Therefore, a water receiving plate protruding radially inward from the outer wall portion of the baffle plate is formed inside the baffle plate. When the adjustment water is poured into the baffle plate while the washing and dehydration tub is rotating, the adjustment water adheres to the outer wall of the baffle plate due to centrifugal force, and is kept from flowing downward from the water receiving plate.

Here, consider a case where, in a state where an imbalance due to an eccentric load near the upper portion of the washing and dehydrating tub exists, and the rotational speed of the washing and dehydrating tub exceeds the resonance rotational speed, the eccentric load is opposed to the eccentric load in order to eliminate the imbalance. Inject adjustment water into the baffle plate.

As shown in (a) of Figure 12, when the adjustment water is injected into the baffle plate 506 when the rotation speed of the washing and dehydration tub 502 exceeds the lower resonance rotation speed, the adjustment water is attached to the side of the baffle plate 506 due to centrifugal force. The outer wall is held above the water receiving plate 516 . At this time, the position of the water surface of the adjustment water is determined by the resultant force of gravity and centrifugal force acting on the adjustment water, so the angle θ formed by the upper surface of the water receiving plate 516 and the water surface (the angle θ of the water surface relative to the horizontal line) is determined according to the washing and dehydration bucket 502. changes with the rotational speed. Sometimes, when the rotational speed of the washing and dehydrating bucket 502 is low, because the above-mentioned angle θ is small, the position of the center of gravity of the adjustment water is low, and the moment is small, so the eccentric load with a large moment on the upper part of the washing and dehydrating bucket 502 cannot be offset, and it cannot be started. dehydration. It should be noted that, in FIG. 12 , the above-mentioned angle θ represents the angle θ at which the rotational speed of the washing and dehydrating tub 502 corresponds to a lower predetermined rotational speed.

Therefore, when the baffle 506 is formed on the inner peripheral surface of the washing and dehydrating tub 502, it is necessary to make the protruding amount near the lower end of the inner wall of the baffle 506 larger than that near the upper end as shown in (b) of FIG. 12 . The amount of protrusion increases the height of the water receiving plate 516 in the radial direction. In this way, when the rotational speed of the washing and dehydrating tub 502 exceeds the low resonance rotational speed, when the adjustment water is poured into the baffle plate 506, even if the above-mentioned angle θ is small, the position of the center of gravity of the adjustment water becomes high and the moment is large. The eccentric load with a large moment on the upper part of the washing and dehydrating tub 502 is counteracted, and the dehydration can be properly started.

Like this, in order to increase the height of the water receiving plate 516, it is necessary to make the protruding amount near the lower end of the inner wall portion of the baffle plate 506 larger than the protruding amount near the upper end, but in this case, there is the following problem: The volume becomes smaller, and when the laundry rotates in the washing and dehydrating tub 502 during the cleaning process, the laundry is easily caught by the baffle plate 506 in the washing and dehydrating tub 502 and damaged.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2017-56025

Contents of the invention

The problem to be solved by the invention

Therefore, the present invention can provide a washing machine that can eliminate the problem of the volume reduction in the dehydration tub and the problem of damage to the laundry, and even in the state where the imbalance caused by the eccentric load near the upper part of the dehydration tub exists. It can also properly start dehydration.

solutions to problems

The washing machine of the present invention is characterized in that it has: a dehydration bucket arranged in the outer tub; more than three water injection parts are arranged at equal intervals along the circumferential direction on the inner peripheral surface or outer peripheral surface of the dehydration tub; and a water injection device, Adjustable water can be injected into each of the water injection parts, and the inside of the water injection part is provided with: a first water receiving plate protruding radially inward from the outer wall of the water injection part at the lower part of the dehydration bucket; and a second The water receiving plate protrudes radially inward from the outer wall of the water injection part on the upper portion of the dewatering bucket, and the protrusion amount of the second water receiving plate is smaller than the protrusion amount of the first water receiving plate.

In the washing machine of the present invention, it is preferable that one or more third water receiving plates arranged between the first water receiving plate and the second water receiving plate in the height direction are provided inside the water injection part. The water receiving plate, the first water receiving plate, the second water receiving plate, and the third water receiving plate are arranged so that the protrusion amount of these water receiving plates becomes smaller from the bottom to the top.

In the washing machine according to the present invention, preferably, the water injection portion is formed outside the spin tub.

Invention effect

According to the present invention, a second water receiving plate is provided above the first water receiving plate in each water injecting portion, and the adjustment water injected into each water injecting portion is first held above the second water receiving plate. Therefore, when the rotation speed of the dehydration tub exceeds the low resonance rotation speed, the position of the center of gravity of the adjustment water injected into the water injection part becomes high and the moment is large. The eccentric load can be counteracted, and the dehydration can be properly started. Therefore, in order to properly start dehydration, it is not necessary to make the protruding amount near the lower end of the water injection part provided on the inner peripheral surface of the dehydrating tub larger than the protruding amount near the upper end, and the volume in the dehydrating tub can be suppressed from becoming smaller, and it can be suppressed. During the cleaning process, the water injection part catches the laundry in the dehydration bucket and damages the laundry.

According to the present invention, the height of the center of gravity of the adjustment water can be changed according to the position of the eccentric load on the upper part of the dehydration tub by adjusting the amount of the adjustment water poured into each water injection part.

According to the present invention, since the water injection part into which the adjustment water is injected is arranged outside the dehydration tank, the input port of the dehydration tank becomes larger and the volume inside the dehydration tank becomes larger than when the water injection part is formed on the inner peripheral surface of the dehydration tank. , and can prevent the water injection part from hooking on the laundry in the spin-dry bucket when the spin-dry bucket rotates during the cleaning process, causing the laundry to be damaged. In addition, even in the case of using a stainless steel dehydration tub with improved durability and cleanability, most of the inner peripheral surface of the dehydration tub will not be covered by the water injection portion as in the case where the water injection portion is formed on the inner peripheral surface of the dehydration tub. Blocking, so the entire inner peripheral surface of the dehydration bucket can be kept clean. In addition, when the injection of water into each water injection part is adjusted, the distance between the water injection part and the rotation axis of the dehydration tub becomes larger than when the water injection part is formed on the inner peripheral surface of the dehydration tub. Therefore, the centrifugal force of the adjustment water acting on the water injection part becomes large, and the eccentric load can be effectively canceled.

Description of drawings

Fig. 1 is a perspective view showing the appearance of a washing machine 1 according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing the structure of the washing machine 1 of FIG. 1 .

FIG. 3 is a top view of the interior of the washing machine 1 of FIG. 1 .

FIG. 4 is a longitudinal sectional view of the interior of washing machine 1 of FIG. 1 .

FIG. 5 shows a state in which the adjustment water poured into the water injection unit 8 is held.

In FIG. 6 , (a) is a diagram showing the state of the adjustment water injected into the water injection part 8 to cancel the eccentric load on the upper part of the dehydration tank 2, and (b) is a diagram showing the state of adjusting water to cancel the eccentric load on the lower part of the dehydration tank 2. A diagram showing the state of the adjustment water injected into the water injection part 8 under load.

Fig. 7 is a schematic diagram showing the configuration of washing machine 101 according to the second embodiment of the present invention.

FIG. 8 is a top view of the interior of the washing machine 101 of FIG. 7 .

FIG. 9 is a longitudinal sectional view of the inside of washing machine 101 of FIG. 7 .

FIG. 10 is a diagram showing a state in which the adjustment water poured into the water injection part 108 is held by the first water receiving plate 116 and the second water receiving plate 118 .

FIG. 11 is a diagram showing a state in which conditioning water poured into water injection unit 8 is held in washing machine 201 according to a modified example of the first embodiment of the present invention.

FIG. 12 is a diagram illustrating a conventional water receiving plate 516 provided in a washing machine 502 .

Explanation of reference signs

1: washing machine; 2: dehydration barrel; 2a: inner peripheral surface of dehydration barrel; 3: outer barrel; 8: water injection part; 16: first water receiving plate; 18: second water receiving plate; 30: water injection device; 101 : washing machine; 102: dehydration bucket; 102b: outer peripheral surface of dehydration bucket; 108: water injection part; 116: first water receiving plate; 118: second water receiving plate; 201: washing machine; 218: third water receiving plate.

Detailed ways

Hereinafter, the washing machine according to the embodiment of the present invention will be described in detail based on the drawings.

(first embodiment)

Fig. 1 is a perspective view showing the appearance of a vertical washing machine 1 according to a first embodiment of the present invention. FIG. 2 is a schematic diagram showing the configuration of washing machine 1 according to the present embodiment. FIG. 3 is a top view of the inside of washing machine 1 according to the present embodiment, and FIG. 4 is a longitudinal sectional view of the inside of washing machine 1 .

The washing machine 1 of the present embodiment includes a washing machine main body 1 a , a dehydration tub 2 , an outer tub 3 , a water injection device 30 , and a drive unit 50 .

The main body 1a of the washing machine shown in Fig. 1 has a substantially rectangular parallelepiped shape. An opening 11 for loading and unloading laundry into and out of the washing and dehydrating tub 2 is formed on the upper surface of the washing machine main body 1a, and an opening and closing cover 11a capable of opening and closing the opening 11 is attached.

The outer tub 3 is a bottomed cylindrical member arranged inside the washing machine main body 1a, and can store washing water inside. A drain pipe 3n is connected to the bottom surface of the tub 3 . As shown in FIG. 2 , an acceleration sensor 58 capable of detecting acceleration in both the horizontal and vertical directions is mounted on the outer peripheral surface 3 a of the tub 3 . In this embodiment, the acceleration of the outer tub 3 is detected by the acceleration sensor 58 , and the acceleration of the washing and dehydrating tub 2 is substantially the same as the acceleration of the outer tub 3 .

The spin-drying tub 2 also serves as a washing tub, and is a bottomed cylindrical member arranged coaxially with the outer tub 3 in the outer tub 3 and rotatably supported. The spin-drying tub 2 can accommodate laundry inside, and has many water passage holes 2t on its wall surface (refer to FIG. 4 ).

In the center of bottom 2c of such spin-drying tub 2, pulsator (stirring blade) 4 is rotatably arranged. As shown in FIG. 2, the pulsator 4 has a substantially disc-shaped pulsator body 4a, a plurality of upper blades 4b formed on the upper surface of the pulsator body 4a, and a plurality of lower blades formed on the lower surface of the pulsator body 4a. 4c. Such a pulsator 4 agitates the washing water stored in the outer tub 3 to generate a water flow.

The water injection device 30 is a device for individually injecting adjustment water into the three water injection parts 8 described later. The water injection device 30 has three water injection hoses 30a respectively connected to the three water injection parts 8, and water supply valves 31a are respectively arranged in the water injection hoses 30a. The water injection hose 30 a is provided with the same number as the three water injection parts 10 , and is arranged above the water receiving ring unit 5 communicating with the three water injection parts 10 . In this embodiment, tap water is used as the conditioning water.

As shown in FIG. 2 , the water receiving ring unit 5 has ring-shaped

water guide grooves

5 a , 5 b , and 5 c open upward, and is fixed to the upper end of the dehydration tub 2 . The

water guide grooves

5 a , 5 b , and 5 c are arranged in three overlapping layers in the radial direction, and are formed so as to allow adjustment water to flow individually to any one of the water injection parts 8 .

The driving part 50 shown in Fig. 2 rotates the pulley 52 and the transmission belt 53 through the motor 51, and rotates the drive shaft 54 protruding toward the bottom 2c of the dehydration bucket 2 to give driving force to the dehydration bucket 2 and the pulsator 4, Make dehydration barrel 2, pulsator 4 rotate. The washing machine 1 mainly rotates only the pulsator 4 during the washing process, and rotates the spin-drying tub 2 and the pulsator 4 integrally at high speed during the dehydration process. Moreover, the proximity switch 55 which can detect the passage of the mark 52a formed in the pulley 52 is provided in the vicinity of the one pulley 53. As shown in FIG.

As shown in FIG. 3, three water injection parts 8 are provided on the inner peripheral surface 2a of the dehydration bucket 2, and the water injection parts 8 are used for injecting adjustment water so as to eliminate the unbalanced state of the dehydration bucket 2 during the dehydration process. The water injection parts 8 are provided on the outer peripheral surface 2b of the dehydration tub 2 at equal intervals (equal angles) along the circumferential direction. Each water injection part 8 is hollow, and its cross-sectional shape is formed in an arc shape.

A water injection pipe 8 a for injecting adjustment water is installed on the upper end of each water injection part 8 , and the water injection pipe 8 a is connected to any one of the

water guide grooves

5 a , 5 b , 5 c of the water receiving ring unit 5 .

As shown in FIG. 4 , a first water receiving plate 16 and a second water receiving plate 18 that protrude radially inward from the outer wall portion of the water injection portion 8 are provided. Both the first water receiving plate 16 and the second water receiving plate 18 are plate-shaped members with the same width in the left and right directions, and are curved in an arc shape throughout the left and right directions of the water injection part 8 . The first water receiving plate 16 and the second water receiving plate 18 are respectively formed such that their upper surfaces are substantially horizontal.

The first water receiving plate 16 protrudes radially inward from the outer wall portion of the water injection portion 8 at the bottom of the dehydration bucket 2, and the second water receiving plate 18 protrudes from the top of the dehydration bucket 2 (in detail, near the center in the vertical direction). The outer wall portion of the portion 8 protrudes radially inward.

In this embodiment, "the lower part of the dehydration bucket 2" refers to the range from the lower end of the dehydration bucket 2 to the vertical center of the dehydration bucket 2, and "the upper part of the dehydration bucket 2" refers to the range from the vertical direction of the dehydration bucket 2. The range from the center to the upper end of the dehydration tub 2 . In addition, the vertical center part of the dehydration tub 2 is included in "the upper part of the dehydration tub 2".

In this way, the first water receiving plate 16 and the second water receiving plate 18 protrude inward from the outer wall portion inside the water injection portion 8, but the protrusion amount (radial length) of the first water receiving plate 16 is smaller than the diameter of the water injection portion 8. To the length (the amount of protrusion of the inner peripheral side wall). Therefore, as shown in (a) of FIG. The adjustment water inside the water injection part 8 above the first water receiving plate 16 flows to the lower side of the first water receiving plate 16 through the first gap 16 a.

In addition, the protrusion amount (radial length) of the second water receiving plate 18 is smaller than the protrusion amount (radial length) of the first water receiving plate 16 . Therefore, as shown in (b) of FIG. Two gaps 18 a , through which the adjustment water inside the water injection part 8 above the second water receiving plate 18 flows to the bottom of the water receiving plate 18 .

Therefore, in the dehydration process, when the adjustment water is injected into the water injection part 8 under the state that the dehydration tub 2 rotates at a relatively low speed, as shown in FIG. The outer wall of the water injection part 8 , so the adjustment water will firstly be held above the second water receiving plate 18 in the water injection part 8 . It should be noted that, in Fig. 5, the angle θ (the angle θ of the water surface relative to the horizontal line) formed by the upper surfaces of the

water receiving plates

16, 18 and the water surface represents the angle θ at which the rotating speed of the dehydration bucket 2 corresponds to a lower specified rotating speed. (wherein, 0<θ<90°).

Afterwards, when the adjustment water is further injected into the water injection part 8, as shown in FIG. The two gaps 18a flow to the bottom of the water receiving plate 18 so that the adjustment water is kept above the second water receiving plate 18 in the water injection part 8 and also above the first water receiving plate 16 in the water injection part 8 .

In this way, when the rotation speed of the dehydration tub 2 exceeds the lower resonance rotation speed, as shown in (a) of FIG. Since the adjustment water is held above the second water receiving plate 18 in the water injection unit 8 , the gravity center position T of the adjustment water injected into the water injection unit 8 becomes higher and the moment becomes larger. Thereby, even if there exists an eccentric load with a large moment in the upper part of spin-drying tub 2, this eccentric load can be canceled.

On the other hand, when the rotation speed of the dehydration tub 2 exceeds the low resonance rotation speed, as shown in (b) of FIG. The adjustment water is held above the second water receiving plate 18 in the water injection unit 8 and is held above the first water receiving plate 16 in the water injection unit 8 .

In this case, the centroid position T of the entire adjustment water injected into the water injection unit 8 is arranged between the center of gravity position Ta of the adjustment water held above the second water receiving plate 18 in the water injection unit 8 and the center of gravity position Ta of the adjustment water held in the water injection unit 8 . Between the center of gravity position Tb of the adjustment water above the first water receiving plate 16 . Therefore, the center of gravity position T of the entire adjustment water is lower than when the adjustment water is held only above the second water receiving plate 18 in the water injection part 8 as shown in FIG. 6( a ). Thereby, even if an eccentric load exists in the lower part of the spin-drying tub 2, this eccentric load can be canceled. It should be noted that it is also conceivable to adjust the amount of adjustment water poured into the water injection part 8 according to the height of the eccentric load of the dehydration tub 2, thereby adjusting the height of the center of gravity T of the entire adjustment water in the water injection part 8.

In contrast, during the dehydration process, when the rotational speed of the dehydration bucket 2 decreases and the centrifugal force decreases, the adjusted water held above the first water receiving plate 16 or the second water receiving plate 18 is no longer attached to the water injection part 8 through the first gap 16a between the top of the first water receiving plate 16 and the inner wall of the water injection part 8 or the second gap between the top of the second water receiving plate 18 and the inner wall of the water injection part 8 18a flows downward.

In the washing machine 1 of the present embodiment, when the proximity switch 55 senses the mark 52a (refer to FIG. 2 ), the unbalance amount is calculated according to the magnitude of the acceleration in the horizontal direction and the vertical direction given by the acceleration sensor 58, and the amount of unbalance is calculated according to the acceleration sensor 58. The angle of the unbalanced direction is calculated from the signals representing the accelerations in the horizontal direction and the vertical direction given and the signal representing the position of the mark 52 a input from the proximity switch 55 .

Based on the signal indicating the unbalanced amount and the unbalanced position, which water injection unit 8 in the spin-drying tub 2 is to be supplied with water and the water supply amount are determined based on a control program stored in advance. It should be noted that, as to which water injection unit 8 in the dehydration tub 2 is to be supplied with water, the water injection at a position in the dehydration tub 2 that is opposite to the position where the laundry lumps that are the main cause of imbalance is located is selected. Part 8. Then, the water supply valve 31a connected to the selected water injection unit 8 is opened to inject the adjustment water, and when the imbalance is eliminated by the water injection unit 8, the injection of the adjustment water is stopped.

As mentioned above, the washing machine 1 of the present embodiment is provided with: a dehydration tub 2 arranged in the outer tub 3; three or more water injection parts 8 arranged at equal intervals along the circumferential direction on the inner peripheral surface 2a of the dehydration tub 2; The device 30 can inject adjustment water into each water injection part 8, and the inside of the water injection part 8 is provided with: a first water receiving plate 16 protruding from the outer wall of the water injection part 8 toward the radially inward at the bottom of the dehydration bucket 2; Two water receiving plates 18 protrude radially inward from the outer wall portion of the water injection portion 8 on the top of the dewatering bucket 2 , and the protruding amount of the second water receiving plate 18 is smaller than that of the first water receiving plate 16 .

When such a structure is adopted, a second water receiving plate 18 is provided above the first water receiving plate 16 in each water injection portion 8, and the adjusted water injected into each water injection portion 8 will first be held on the second water receiving plate 18. above. Therefore, when the rotation speed of the dehydration tub 2 exceeds the low resonance rotation speed, the position of the center of gravity of the adjustment water injected into the water injection part 8 becomes high and the moment is large. Under normal circumstances, the eccentric load can also be counteracted, and the dehydration can be properly started. Therefore, it is not necessary to make the protruding amount near the lower end of the inner wall portion of the water injection part 8 provided on the inner peripheral surface 2a of the dehydrating tub 2 larger than the protruding amount near the upper end in order to properly start the dehydration, and the volume inside the dehydrating tub 2 can be suppressed from becoming smaller. , and can prevent the water injection part 8 from being hooked to the laundry in the dehydration tub 2 during the cleaning process and causing the laundry to be damaged.

(second embodiment)

The difference between the washing machine 101 of the present embodiment and the washing machine 1 of the first embodiment is that in the first embodiment, the water injection part 8 is arranged inside the dehydration tub 2, while in this embodiment, the water injection part 108 Set on the outside of the dehydration bucket 102. In addition, the detailed description is abbreviate|omitted about the structure of the washing machine 101 of this embodiment the same as the structure of the washing machine 1 of 1st embodiment.

Fig. 7 is a schematic diagram showing the configuration of a vertical washing machine 101 according to a second embodiment of the present invention. FIG. 8 is a top view of the inside of washing machine 101 according to this embodiment, and FIG. 9 is a longitudinal sectional view of the inside of washing machine 101 .

In washing machine 101 of this embodiment, as shown in FIGS. 8 and 9 , three baffle plates 106 are provided at equal intervals (equal angles) in the circumferential direction on inner peripheral surface 102a of dehydration tub 102 . Each baffle plate 106 is hollow and has an arcuate cross-sectional shape. As shown in FIG. 7 , each baffle 106 is formed to extend vertically from the bottom 102 c to the upper end of the dehydration tub 102 , and protrude from the inner peripheral surface 102 a of the dehydration tub 102 toward the rotation axis S1 of the dehydration tub 102 . At the upper end portion of the baffle plate 106, a horizontally long circulation port 106a is formed.

Moreover, the opening part 6c which opens near the bottom part 102c of the spin-drying tub 102, more specifically, opens below the pulsator main body 4a is formed in the lower end part of the baffle plate 106. As shown in FIG. Each baffle plate 106 allows the washing water agitated by the lower blade portion 4c of the pulsator 4 to flow to the upper end portion of the dehydration tub 102 during the washing process and to be discharged from the circulating water port 106a.

In addition, as shown in FIG. 8 , three water injection parts 108 are provided on the outer peripheral surface 102 b of the dehydration bucket 102 , and the water injection parts 108 are injected with adjusting water so as to eliminate the unbalanced state of the dehydration bucket 102 during the dehydration process. The water injection parts 108 are provided on the outer peripheral surface 102b of the dehydration tub 102 at equal intervals (equal angles) along the circumferential direction. Each water injection part 108 is hollow, and its cross-sectional shape is formed in an arc shape. The circumferential central portion of the water injection portion 108 is disposed radially outward of the circumferential central portion of the baffle plate 106 . Each water injection portion 108 and each baffle plate 106 are formed as separate spaces. In addition, the water injection part 8 is formed between the inner peripheral surface of the cover member and the outer peripheral surface 2b of the dehydration tub 102 specifically, by attaching the cover member whose inner surface opened to the outer peripheral surface of the dehydration tub 102.

As shown in FIG. 9 , a first water receiving plate 116 and a second water receiving plate 118 protruding radially inward from the outer wall portion of the water injection portion 108 are provided. Both the first water receiving plate 116 and the second water receiving plate 118 are plate-shaped members with the same width in the left and right directions, and are curved in an arc shape in the left and right directions of the water injection part 108 as a whole. The first water receiving plate 116 and the second water receiving plate 118 are respectively formed such that their upper surfaces are substantially horizontal.

The first water receiving plate 116 protrudes radially inward from the outer wall portion of the water injection portion 108 at the bottom of the dehydration bucket 102, and the second water receiving plate 118 protrudes from the top of the dehydration bucket 102 (in detail, near the center in the vertical direction). The outer wall portion of the portion 108 protrudes radially inward.

In this way, the first water receiving plate 116 and the second water receiving plate 118 protrude inward from the outer wall portion inside the water injection part 108, but the protrusion amount (radial length) of the first water receiving plate 116 is smaller than the diameter of the water injection part 108. to length. Therefore, as shown in (a) of FIG. 10 , at the lower end of the water injection part 108 , a first gap is formed between the top end (radially inner end) of the first water receiving plate 116 and the inner wall of the water injection part 108 . 116 a , the adjustment water inside the water injection part 108 above the first water receiving plate 116 flows to the bottom of the first water receiving plate 116 through the first gap 116 a.

In addition, the protrusion amount (radial length) of the second water receiving plate 118 is smaller than the protrusion amount (radial length) of the first water receiving plate 116 . Therefore, as shown in (b) of FIG. In the second gap 118 a , the adjustment water inside the water injection part 108 above the second water receiving plate 118 flows to the bottom of the water receiving plate 118 through the second gap 118 a.

Like this, the adjustment water injected into the water injection part 108 will first be held above the second water receiving plate 118 in the water injection part 108, so when the rotational speed of the dehydration tub 102 exceeds the lower resonance rotational speed, the water injected into the water injection part 108 Adjust the position of the center of gravity of the water to become higher and the moment to become larger. Thereby, even if there exists an eccentric load with a large moment in the upper part of spin-drying tub 102, this eccentric load can be canceled. It should be noted that, in FIG. 10 , the angle θ formed between the upper surfaces of the

water receiving plates

116, 118 and the water surface (the angle θ of the water surface relative to the horizontal line) represents the angle θ at which the rotational speed of the dehydration bucket 102 corresponds to a lower specified rotational speed. .

As mentioned above, the washing machine 101 of the present embodiment is equipped with: a dehydration tub 102 disposed in the outer tub 3; three or more water injection parts 108 arranged at equal intervals along the circumferential direction on the outer peripheral surface 2b of the dehydration tub 102; and a water injection device 30, can inject adjustment water to each water injection part 108, be provided with in the inside of water injection part 108: the first water receiving plate 116, at the bottom of dewatering barrel 102 protrude from the outer wall part of water injection part 108 toward radially inward; And the second The water receiving plate 118 protrudes radially inward from the outer wall of the water injection portion 108 on the top of the dewatering bucket 102 , and the protrusion of the second water receiving plate 118 is smaller than that of the first water receiving plate 116 .

Washing machine 101 of this embodiment can obtain the same effects as those of the first embodiment.

In washing machine 101 according to the present embodiment, water injection unit 108 is formed outside dehydration tub 102 .

When adopting such a structure, the water injection part 108 for injecting the adjustment water is arranged on the outside of the dehydration bucket 102, so compared with the case where the water injection part 8 is formed on the inner peripheral surface 102a of the dehydration bucket 102, the input port of the dehydration bucket 102 becomes smaller. Large and the volume in the dehydration bucket 102 becomes larger, and it can prevent the water injection part 8 from hooking on the laundry in the dehydration bucket 2 when the dehydration bucket 102 rotates during the cleaning process and causing the laundry to be damaged. In addition, even if the stainless steel dehydration tub with improved durability and cleanability is used, most of the inner peripheral surface 102a of the dehydration tub 102 will not be formed on the inner peripheral surface 102a of the dehydration tub 102 like the water injection portion 108. Since it is blocked by the water injection part 108 as usual, the entire inner peripheral surface 102a of the dehydration tub 102 can be kept clean. In addition, when adjusting water injection into each water injection part 108, the distance between the water injection part 108 and the rotation axis of the dehydration tub 102 becomes larger than when the water injection part 108 is formed on the inner peripheral surface 102a of the dehydration tub 102. Therefore, the centrifugal force of the adjustment water acting in the water injection part 108 becomes large, and the eccentric load can be effectively canceled out.

As mentioned above, although embodiment of this invention was described, the structure of this embodiment is not limited to the said content, Various deformation|transformation is possible.

In the above-mentioned first embodiment, the first water receiving plate 16 arranged at the lower part of the dehydrating bucket 2 and the second water receiving plate 18 arranged at the upper part of the dehydrating bucket 2 are provided inside the water injection part 8, but it is not limited to this. For example, three or more water receiving plates may be provided inside the water injection unit 8 . The same holds true for the second embodiment described above.

In the above-mentioned first embodiment, both the first water receiving plate 16 and the second water receiving plate 18 are plate-shaped members having the same width in the left-right direction, but the present invention is not limited thereto. The shape of the 1st water receiving plate 16 and the 2nd water receiving plate 18 should just be the shape which can hold adjustment water above them. In addition, the arrangement|positioning (at which height in the height direction of the spin-drying tub 2) of the 1st water receiving plate 16 and the 2nd water receiving plate 18 is arbitrary.

In a washing machine 201 according to a modified example of the first embodiment, as shown in FIG. Three water receiving plates 218. The protruding amount (radial length) of the third water receiving plate 218 is less than the protruding amount (radial length) of the first water receiving plate 16, and the protruding amount (radial length) of the second water receiving plate 18 is smaller than the third water receiving plate 18. The amount of protrusion (radial length) of the plate 218.

In the washing machine 201 according to the modified example of the above-mentioned first embodiment, the third water receiving plate 218 disposed between the first water receiving plate 16 and the second water receiving plate 18 in the height direction is provided inside the water injection unit 8 . , and assume that the protrusions of these water-receiving plates become smaller as they go from below to above.

With such a structure, the height of the center of gravity of the adjustment water can be changed according to the position of the eccentric load on the upper part of the dehydration tub 2 by adjusting the amount of adjustment water poured into each water injection part 8 .

In addition, in the above modification, it is also possible to provide a plurality of third water receiving plates 218 arranged between the first water receiving plate 16 and the second water receiving plate 18 in the height direction, and the first water receiving plate 16. The second water-receiving plate 18 and the plurality of third water-receiving plates 218 are set such that the protrusion of these water-receiving plates becomes smaller as they go from below to above. The same holds true for the second embodiment described above.

In the above-mentioned first embodiment, the three water injection parts 8 provided inside the dehydration tub 2 are provided inside the dehydration tub 2, but the present invention is not limited thereto. The number of water injection parts 8 provided inside the spin-drying tub 2 is arbitrary. In addition, the three water injection parts 8 provided inside the spin-drying tub 2 may also be provided in a structure similar to that of the baffle plate 106 of the above-mentioned second embodiment.

In the above-mentioned second embodiment, three water injection parts 108 having the same number as the three baffles 106 provided inside the dehydration tub 102 are provided on the outside of the dehydration tub 102, but the present invention is not limited thereto. The number of water injection parts 108 provided outside the dehydration tub 102 is arbitrary. In addition, the left-right central part of the water injection part 108 is arranged radially outside the left-right central part of the baffle 106, but the positions of the water injection part 108 and the baffle 106 are arbitrary. The number of water injection parts 108 and the number of baffles 106 may also be different. In addition, the water injection part 108 may be provided in the outer side of the spin-drying tub 102 which does not provide the baffle plate 106. As shown in FIG. The same holds true for the second embodiment described above.

In the above-mentioned second embodiment, the water injection part 108 is formed between the inner peripheral surface of the cover member and the outer peripheral surface 102b of the dehydrating tub 102 by assembling the cover member whose inner surface is open to the outer peripheral surface of the dehydration tub 102, but does not limited to this. For example, the water injection unit 108 may be provided outside the dehydration tub 102 by attaching a box-shaped cover member to the outer peripheral surface of the dehydration tub 102 . In this case, the first water receiving plate 116 and the second water receiving plate 118 may be provided inside the water injection unit 108 similarly to the second embodiment described above.

Various modifications can also be made in other structures within the scope not departing from the gist of the present invention.

Claims

A washing machine, characterized in that it has:

The dehydration barrel is arranged in the outer barrel;

More than three water injection parts are arranged at equal intervals along the circumferential direction on the inner or outer peripheral surface of the dehydration bucket; and

a water injection device capable of injecting adjustment water into each of the water injection parts,

Inside the water injection part is provided with:

a first water receiving plate protruding radially inward from the outer wall portion of the water injection portion at the lower portion of the dehydration bucket; and

The second water receiving plate protrudes radially inward from the outer wall of the water injection part on the upper part of the dehydration bucket,

The protruding amount of the second water receiving plate is smaller than the protruding amount of the first water receiving plate.
The washing machine according to claim 1, characterized in that,

One or more third water-receiving plates arranged between the first water-receiving plate and the second water-receiving plate in the height direction are arranged inside the water injection part,

The first water receiving plate, the second water receiving plate, and the third water receiving plate are provided such that the amount of protrusion of these water receiving plates becomes smaller from below to above.
The washing machine according to claim 1 or 2, characterized in that,

The water injection part is formed outside the dehydration tub.