JP7289042B2 - washing machine - Google Patents

Description

The present disclosure relates to washing machines.

Patent Literature 1 discloses a washing machine that reduces the amount of water used to wash the inside of the tub in a short period of time. This washing machine includes a housing, an outer tub that is supported in the housing to prevent vibration and stores washing water therein, and a washing and dehydrating tub that is rotatably supported in the outer tub and accommodates the laundry. a driving device for rotationally driving the washing and dehydrating tub; water supply means for supplying washing water to the washing and dehydrating tub; and drainage means for draining the washing water from the washing and dehydrating tub. In a washing machine provided with control means for controlling the execution of each step of dehydration, the control means executes a tub interior cleaning course for cleaning the inside of the washing and dehydration tub.

JP 2018-157958 A

To provide a washing machine provided with a dedicated course for effectively rinsing the inside of a water tank and the inside and outside of a washing and dewatering tank with a small amount of water while preventing water splashing.

The washing machine according to the present disclosure includes a main body, a water tank suspended and vibration-proof in the main body, a washing and dewatering tank rotatably contained in the water tank, and a rotatably disposed central inner bottom of the washing and dewatering tank. A pulsator with a plurality of lower blades formed on the back side, a motor that rotates the pulsator and the washing and dewatering tub, a water supply valve that supplies water to the tub, a drain valve that drains the water from the tub, and a drain valve that drains the water from the tub. An operation display unit provided on the provided upper frame and having operation means for selecting and inputting operation course modes and various functions and display means for displaying the input information, etc., and an inner wall of the washing and spin-drying tub A circulation channel cover formed to face each other and formed in a vertically long shape, a circulation channel formed by the washing and dewatering tank and the circulation channel cover, and a lower blade of the pulsator formed in the inner bottom of the washing and dewatering tank containing the lower blade. a pump chamber formed in the circulating water channel cover, and a discharge part that discharges the water reaching the circulating channel from the pump chamber by the rotation of the pulsator into the washing and dehydrating tank at a wide angle, a motor, a water supply valve, a drain valve, etc. and a control means for controlling each step of washing, rinsing, and dehydration, wherein the control means enables execution of a tank rinsing course for rinsing the water tank and the washing and dewatering tank, and the tank rinsing In the course, at a predetermined water level, the pulsator is rotated at a predetermined number of revolutions for an ON time that is longer than the ON time for washing clothes , and water is discharged from the discharge part to rinse the inner surface of the washing and dehydrating tub. , the water is drained while rotating the washing and dewatering tub at a predetermined number of revolutions, thereby rinsing the outer surface of the washing and dewatering tub and the inner surface of the water tub.

The washing machine according to the present disclosure has a dedicated course for effectively rinsing the inner surface of the water tank and the inner and outer surfaces of the washing and dewatering tank with a small amount of water, thereby improving the sense of cleanliness and satisfying the user's request. can be made

Longitudinal sectional view of the washing machine according to Embodiment 1 (a) Front view of circulation channel of washing machine according to Embodiment 1, (b) Back view of circulation channel of washing machine according to Embodiment 1 Flowchart of Operation of Tub Rinse Course of Washing Machine in Embodiment 1 Cross-sectional view of a main part of a washing machine according to Embodiment 2 Principal part cross-sectional view as viewed from the front of the circulation channel part of the washing machine according to Embodiment 2 AA cross-sectional view of the upper water passage portion of the circulation water passage portion of the washing machine according to Embodiment 2

(Knowledge, etc. on which this disclosure is based)
At the time when the inventors came up with the present disclosure, when rinsing the inside of the dehydration tank, only the part that comes into contact with the water is rinsed, so we want to rinse the water level that was used for washing. There was a technique to set the rinsing water level higher than the water level. This required a lot of water.

In addition, as a method for rinsing the inside of the washing and dehydrating tub with a small amount of water, as in Patent Document 1, after opening the drain valve, the washing and dehydrating tub is accelerated to a specified number of revolutions in a substantially constant time, There is a technology that rotates in both left and right directions and supplies water when the rotation of the washing and dehydrating tub is stopped, or when the rotation is rising. This utilizes the splashing of water when supplying water, and the higher the rotation speed, the higher the splashing position of the water. The outer surface of the washing and dewatering tub and the inner surface of the tub were not soothed. In addition, the inventors found that it is difficult to uniformly rinse the inner surface of the water tank and the inner and outer surfaces of the washing and dehydrating tank, causing unevenness, and that water tends to splash out of the machine if there is no inner lid. discovered and come to constitute the subject of the present disclosure in order to solve that problem.
□ Therefore, the present disclosure is a dedicated course that can effectively rinse the inner surface of the water tank, the inner surface and the outer surface of the washing and dewatering tank with a small amount of water while preventing water splashing. To provide a washing machine which satisfies a user's request.

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters or redundant descriptions of substantially the same configurations may be omitted. This is to avoid the following description from becoming more redundant than necessary and to facilitate understanding by those skilled in the art.

It should be noted that the accompanying drawings and the following description are provided to allow those skilled in the art to fully understand the present disclosure and are not intended to limit the claimed subject matter thereby.

(Embodiment 1)
Embodiment 1 will be described below with reference to FIGS. 1 to 3. FIG.

[1-1. composition]
[1-1-1. Configuration of washing machine]
In FIG. 1, a main body 2 of a washing machine 1 has a water tank 3 supported internally by a plurality of suspensions 13 to absorb vibrations during dehydration.

Inside the water tub 3, a washing and dehydrating tub 7 for storing the laundry is arranged rotatably around a washing/dehydrating shaft 4 having a hollow double structure, and clothes are placed in the inner bottom of the washing and dehydrating tub 7. A pulsator 8 for stirring (laundry) is rotatably arranged, and a drain port 25 and a drain valve 26 are provided at the bottom. An inner lid 29 is provided on the upper opening side of the water tub 3 .

The washing and dewatering tub 7 has a large number of dehydration holes 5 provided on its side wall, and an annular fluid balancer 6 for reducing dehydration vibration is attached to its upper portion. A plurality of circulating water channel covers 14 are provided on the side wall, and the circulating channel cover 14 and the side wall of the washing and dehydrating tub 7 constitute the circulating water channel 10 . As the pulsator 8 rotates, the water in the washing and dehydrating tub 7 is lifted from the pump chamber 19 through the circulation channel 10 by the centrifugal force generated by the rotation of the lower blades 18 formed on the back surface of the pulsator 8, and the washing and dehydrating tub 7. The washing liquid is discharged and sprinkled into the washing and dehydrating tub 7 from an upper discharge port 11 formed in the upper portion and a middle discharge port 12 formed in the middle. In addition, the configuration around the circulating water channel 10 will be described in detail with reference to FIG. 2 and subsequent figures.

The motor 9 is attached to the bottom of the water tub 3 and has a built-in clutch mechanism and a brake mechanism. 8 is rotationally driven, the dehydration shaft is unbraked during dehydration, the drain valve 26 is opened, the washing and dehydration tub 7 is driven to rotate, and the washing liquid in the tub 3 is drained from the drain port 25 to the drain valve 26. Drain the water out of the machine.

The upper frame 21 covers the upper part of the main body 2 and has an openable/closable lid 28 for covering the laundry inlet 27 in the substantially central part. A water supply valve 22 for supplying water is provided. Further, on the upper frame 21, an operating means (not shown) for selecting and inputting operation course modes such as a standard course and a tank rinsing course and various functions, and a display means (not shown) for displaying the input information and the like are provided. ) is provided. A control device 24 is provided inside the operation display section 23 .

The control device 24 is provided with control means (not shown) consisting of a microcomputer, controls the motor 9, the water supply valve 22, the drain valve 26, etc., and sequentially controls the series of steps of washing, rinsing, and dehydration. It consists of

[1-1-2. Configuration of circulation channel]
In FIG. 1, two circulation channel covers 14 are provided facing the inner wall of the washing and dehydrating tub 7 . As shown in FIG. 2(b), on the back surface of the circulating water channel cover 14, circulating channel ribs 15 that regulate the flow of water in the circulating channel 10 are provided. The circulation channel 10 is formed by abutting on the side wall of the washing and dehydrating tub 7, and the flow rate can be controlled by changing the shape of the circulation channel ribs 15. FIG.

Further, as shown in FIGS. 2A and 2B, an upper discharge port 11 is formed in the upper portion of the circulating water channel cover 14, and a central discharge port 12 is formed in the central portion of the circulating water channel cover 14. is formed. As shown in FIG. 1, a lower blade 18 is integrally formed on the rear surface of the pulsator 8, and a pump chamber 19 formed on the outer periphery of the lower blade 18 communicates with the circulating water passage 10. As shown in FIG.

Further, the opening width 11b at both ends of the upper discharge port 11 is wider in the vertical direction than the opening width 11a at the central portion, and the opening width 12b at both ends of the middle discharge port 12 is wider than the opening width 12a at the central portion. It is wider in the vertical direction. As a result, the water discharged from the upper outlet 11 and the middle outlet 12 can be discharged over a wide angle, and the water can be discharged over a wide range in the washing and dehydrating tub 7 in a shower-like manner.

[1-2. action, action]
The operation and effect of the washing machine constructed as above will be described below.

Here, water levels H1 to H5 in FIG. 1 are set as follows.

The water level H1 is the water level at which the upper edge of the pulsator 8 is submerged, the water level H2 is the water level positioned between the upper edge of the pulsator 8 and the central outlet 12, and the water level H3 is slightly above the central outlet 12, that is, the central outlet. A water level H4 at which the outlet 12 is submerged is a water level positioned between the upper outlet 11 and the middle outlet 12, and a water level H5 is a water level slightly lower than the upper outlet 11.

In the normal washing course, the water level is set according to the amount of laundry. If the amount of laundry is large, the washing is performed at water level H5, and if the amount of laundry is medium, the water level is set to H4. , when the amount of laundry is small, the washing is performed at the water level H3.

Based on FIG. 3, the operation of the tub rinsing course of the washing machine 1 will be described.

In FIG. 3, with the inside of the washing and dehydrating tub 7 empty, select the tub rinsing course (not shown) displayed on the operation display unit 23, press the start button (not shown), and start the tub rinsing course. is started (step S100).

When started, the water supply valve 22 operates with the water discharge valve 26 closed to supply water up to a first predetermined water level (for example, water level H3) (step S101). When the water supply starts, the pulsator 8 is rotated at a second predetermined water level (for example, the water level H2) during the water supply, and the stirring operation is performed while supplying the water (step S102). Here, while water is being supplied, water is sprayed from the central discharge port 12 into the washing/drying tub 7 to wash and rinse the lower inner surface of the washing/drying tub 7 .

After a first predetermined time (for example, 30 seconds) has elapsed, the stirring of the pulsator 8 is stopped, but the water supply continues (step S103). Water supply is stopped (step S104).

Next, agitation by the pulsator 8 starts (step S105). When the pulsator 8 rotates, the water in the washing and dehydrating tub 7 and the tub 3 is circulated through the pump chamber 19 by the centrifugal force generated by the rotation of the lower blade 18. 10 is raised, and water is sprayed into the washing and dehydrating tub 7 from the upper outlet 11 and the central outlet 12 . When the pulsator 8 is stopped, the central discharge port 12 is in the water. However, as the pulsator 8 rotates, the water level in the washing and dehydrating tub 7 drops. The water discharged from the discharge port 12 can also rinse and wash the inner surface of the washing and dewatering tub 7 .

Water is discharged from the upper discharge port 11 and the central discharge port 12 in the form of a shower and applied to the inner surface of the washing and dehydrating tub 7 over a wide range, so that the inner surface of the washing and dehydrating tub 7 can be thoroughly washed and rinsed. . If the ON time is short, the amount of water to be raked up is small and ends without reaching the discharge port. is possible, and according to experiments, it is desirable that the ON time is 2 seconds or longer. In addition, water is vigorously discharged at the initial stage of rotational driving of the pulsator 8, but even if the pulsator 8 continues to rotate continuously after that, the momentum of the discharged water weakens and the water can be continuously discharged over a wide range. Can not.

Therefore, by increasing the number of revolutions of the pulsator 8, it is possible to discharge continuously without narrowing the discharge range. The rotation speed of the pulsator 8 is desirably in the range of 80 r/min to 150 r/min. Examples include 80 r/min for 0 to 0.6 seconds and 120 r/min for 0.6 to 2 seconds. When the water is discharged at a high rotation speed from the beginning, when the discharge ports are arranged at opposite positions, the discharged water collides with each other, and in the case of the washing machine without the inner lid 29, it leads to the water splashing out of the water tank 3. The number of rotations is controlled so that the discharge water does not collide with the discharge water.

After the agitation by the pulsator 8 is performed for a second predetermined time (for example, 1 minute), the drain valve 26 is opened and the water in the water tank 3 is drained out of the machine (step S106).

At a third predetermined water level (for example, water level H1) in the middle of draining water, the motor 9 is driven, and the washing and dewatering tub 7 rotates at a first predetermined number of revolutions (for example, 170 r/min) while draining water. Rotating tank rotation is performed (step S107). Centrifugal force due to the rotation of the tank raises the water level between the water tank 3 and the washing/dehydrating tank 7, so that the dirt adhering to the inner surface of the water tank 3 and the outer surface of the washing/dehydrating tank 7 can be washed away. After washing the inner surface of the water tank 3 and the outer surface of the washing and dehydrating tank 7, the water falls down from between the water tank 3 and the washing and dehydrating tank 7, and is discharged out of the machine through the drain port 25 through the drain valve 26. . The third predetermined water level is, for example, the water level H1 as described above. However, if the amount of water is too large, the load applied to the motor 9 will be increased, which is not preferable.

After that, in order to prevent the water from splashing due to the recoil of the brake, the motor 9 is stopped while the drain valve 26 is kept open, and the washing and dehydrating tub 7 is inertially rotated to a second predetermined number of revolutions (for example, 35 r//). min or less), the brake is applied (step S108).

Then, in order to remove the water droplets remaining in the washing/dehydration tub 7 and water tub 3, the motor 9 is driven to rotate the washing/dehydration tub 7 at a third predetermined rotation speed (for example, 780 r/min). Dehydration is performed (step S109), and when a third predetermined time (for example, 0.5 minutes) has elapsed, the rotation of the washing and dewatering tub 7 is terminated, and the tub rinsing course is terminated (step S110).

[1-3. effects, etc.]
As described above, in the present embodiment, the washing machine 1 includes a main body 2, a water tank 3 suspended and supported in the main body 2 for vibration isolation, a washing and dehydrating water tank 7 rotatably contained in the water tank 3, A pulsator 8 which is rotatably disposed in the central inner bottom of the washing and dehydrating tub 7 and has a plurality of lower blades formed on the back side, a motor 9 which rotationally drives the pulsator 8 and the washing and dehydrating tub 7, and water supply to the tub 3. a water supply valve 22 for draining water from the water tank 3; an operation display unit 23 having display means for displaying input information and the like; a circulating channel cover 14 provided facing the inner wall of the washing/drying tub 7 and formed in a vertically long shape; and a circulation channel cover 14; a pump chamber 19 formed in the inner bottom of the washing and dehydrating tub 7 and accommodating the lower blades of the pulsator 8; Controls the operation of the upper discharge port 11 through which the water reaching the circulation channel 10 from the pump chamber 19 by rotation is discharged into the washing and dehydrating tub 7 at a wide angle, the motor 9, the water supply valve 22, the drain valve 26, etc. and a control means for controlling each step of washing, rinsing and dewatering. The control means enables execution of a tank rinsing course for rinsing the water tank 3 and the washing and dehydrating tank 7. In the tank rinsing course, the pulsator 8 is rotated at a predetermined number of revolutions at a predetermined water level, and water is discharged from the upper discharge port 11. Thus, the inner surface of the washing/drying tub 7 is rinsed, and then the water is drained while rotating the washing/drying tub 7 at a predetermined number of revolutions, so that the outer surface of the washing/drying tub 7 and the inner surface of the water tub 3 are rinsed. It is what I did.

Thus, in the tank rinsing course, the pulsator 8 is rotated at a predetermined number of revolutions at a predetermined water level, and water is discharged from the upper discharge port 11 to rinse the inner surface of the washing and dehydrating tank 7, and then the washing and dehydrating tank. The outer surface of the washing and dewatering tub 7 and the inner surface of the tub 3 can be rinsed by draining water while rotating the tub 7 at a predetermined number of revolutions. Therefore, as a dedicated course, the inner surface of the water tank 3, the inner surface and the outer surface of the washing and dehydrating tank 7 can be effectively rinsed with a small amount of water while preventing water splashing, thereby improving the sense of cleanliness and improving the user's sense of cleanliness. can satisfy your demands.

As in the present embodiment, the control means in the washing machine 1, when rotating the pulsator 8 at a predetermined number of revolutions at a predetermined water level in the tub rinsing course, sets the ON time when the pulsator 8 is rotationally driven to the ON time when the clothes are washed. It may be made longer than the time and the rotation speed of the pulsator 8 may be increased during the rotation.

As a result, it is possible to increase the amount of rinse water that is raked up by the lower blades of the pulsator 8 and discharged from the pump chamber 19 into the washing and dehydrating tub 7 through the circulating water passage 10 . Extending the ON time of the pulsator 8 during normal washing and rinsing the inner surface of the washing and dehydrating tub 7 has the problem that the rotation of the pulsator 8 causes the clothes to spin too vigorously, making it easier for the water to splatter, and that rinsing causes the clothes to float. It is important to have a separate bath rinse course from the normal wash, as the dirt will stick to the clothes. If the ON time is short, the amount of water to be raked up is small, and a phenomenon occurs in which the water is finished without reaching the upper discharge port 11 . In addition, although the water is vigorously discharged at the initial stage of the rotation of the pulsator 8, even if the pulsator 8 is continuously rotated, the momentum of the discharge weakens and the water can be discharged over a wide range. Can not. Therefore, by increasing the rotational speed of the pulsator 8 during rotation, it is possible to discharge continuously without narrowing the range. In addition, when discharging at a high rotational speed from the beginning, since the upper discharge ports 11 are provided facing each other, there is a danger that the discharged water will collide with each other and lead to splashing out of the machine. By setting the number of revolutions at which water does not collide, and then increasing the number of revolutions, the discharge water does not collide and the discharge water can be discharged continuously.

As in the present embodiment, the discharge part in washing machine 1 may be composed of upper discharge port 11 provided in the upper part of circulation channel 10 and middle discharge port 12 provided in the middle.

As a result, it is possible to rinse the inner surface from the upper part to the inner surface middle part and from the inner surface middle part to the inner surface lower part of the washing and dehydrating tub 7, so that the entire inner surface from the top to the bottom can be rinsed. Therefore, it is possible to improve the feeling of cleanliness and satisfy the demands of the user.

(Embodiment 2)
Embodiment 2 will be described below with reference to FIGS. 4 to 6. FIG.

[2-1. composition]
[2-1-1. Configuration of washing machine]
The same reference numerals are assigned to the same configurations as in the first embodiment, and the description thereof is omitted.

[2-1-2. Configuration of circulation channel]
In FIGS. 4 to 6, the circulation channel cover 34 is provided at two locations facing the inner wall of the washing/dehydration tub 7 . is composed of an upper cover 36 on the lower surface side of the fluid balancer 6 . The circulating water channel 30 is formed by the circulating water channel cover 34, and the circulating water channel 30 is composed of a side water channel 37 and an upper water channel 38 communicating with the side water channel 37 and formed in the upper cover 36.

A lower blade 18 is integrally formed on the rear surface of the pulsator 8 , and a pump chamber 19 formed on the outer circumference of the lower blade 18 communicates with the circulation water passage 10 .

The circulating water channel cover 14 has a substantially T shape as a whole, the side cover 35 is vertically long, and the upper cover 36 is horizontally long. A central discharge port 31 is formed so as to face the inside of the dewatering tank 7 , and left and right discharge ports 32 and 33 are formed on the left and right sides of the central discharge port 31 .

[2-2. action, action]
Descriptions of the same operations and effects as in the first embodiment are omitted.

[2-3. effects, etc.]
As described above, in the present embodiment, the circulating water channel cover 34 of the washing machine 1 is composed of the side cover 35 and the upper cover 36 communicating with the side cover 35, and the discharge part is provided at the upper part of the side cover 35. A central outlet 31, a left outlet 32 provided at the left end of the upper cover, and a right outlet 33 provided at the right end.

As a result, a wide range of the inner surface of the washing and dehydrating tub 7 can be rinsed, so that the entire inner surface can be rinsed. Therefore, it is possible to improve the feeling of cleanliness and satisfy the demands of the user.

INDUSTRIAL APPLICABILITY The present disclosure can be applied to a washing machine that effectively rinses the inner surface of a water tank and the inner and outer surfaces of a washing and dewatering tank with a small amount of water by providing a dedicated course to improve cleanliness. Specifically, the present disclosure is applicable to vertical washing machines, drum-type washing machines, and the like.

REFERENCE SIGNS LIST 1 washing machine 2 main body 3 water tub 4 washing/dehydration shaft 5 dehydration hole 6 fluid balancer 7 washing and dehydration tub 8 pulsator 9 motor 10 circulating water channel 11 upper discharge port (discharge part)
12 Central discharge port (discharge part)
13 Suspension 14 Circulating Channel Cover 15 Circulating Channel Rib 18 Lower Blade 19 Pump Chamber 21 Upper Frame 22 Water Supply Valve 23 Operation Display Part 24 Control Device (Control Means)
25 Drain port 26 Drain valve 27 Laundry inlet 28 Open/close lid 29 Inner lid 30 Circulating water channel 31 Central discharge port (discharge part)
32 Left discharge port (discharge part)
33 Right discharge port (discharge part)
34 circulation channel cover 35 side cover 36 upper cover 37 side channel 38 upper channel

Claims (4)

the main body;
a water tank suspended and vibration-proof supported in the main body;
a washing and dehydrating tub rotatably included in the tub;
a pulsator that is rotatably disposed in the center inner bottom of the washing and dewatering tub and has a plurality of lower blades formed on the back side;
a motor that rotationally drives the pulsator and the washing and dehydrating tub;
a water supply valve for supplying water to the water tank;
a drain valve for draining water in the water tank;
an operation display unit provided on an upper frame provided on the upper part of the main body and having an operation means for selecting and inputting a driving course mode and various functions and a display means for displaying the input information;
a vertically elongated circulating water channel cover provided to face the inner wall of the washing and dehydrating tank; and a circulating channel formed by the washing and dehydrating tank and the circulating water channel cover;
a pump chamber formed in the inner bottom of the washing and dehydrating tub and accommodating the lower blade of the pulsator; a discharge part that discharges into the washing and dehydrating tub at a wide angle;
Control means for controlling the operations of the motor, the water supply valve, the drain valve, etc., and controlling each process of washing, rinsing, and dehydration,
The control means is
enabling execution of a tank rinsing course for rinsing the water tank and the washing and dewatering tank;
In the tank rinsing course, the pulsator is rotated at a predetermined number of revolutions for an ON time longer than the ON time for washing clothes at a predetermined water level, and water is discharged from the discharge part, thereby cleaning the inner surface of the washing and dehydrating tank. rinse,
After that, the washing and dewatering tub is rotated at a predetermined number of revolutions to drain the water, thereby rinsing the outer surface of the washing and dehydrating tub and the inner surface of the water tub. 2. The washing machine according to claim 1, wherein said control means increases the number of revolutions of said pulsator during rotation of said pulsator in said tub rinsing course . 3. The washing machine according to claim 1, wherein said discharge part is provided in upper and middle parts of said circulation channel. 3. According to claim 1 or 2, the circulating water channel cover is composed of a side cover and an upper cover communicating with the side cover, and the discharge part is provided on the upper part of the side cover and on the left and right ends of the upper cover. Washing machine as described.

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