JPH07222893A - Washing machine - Google Patents

Abstract

PURPOSE:To provide a washing machine which can sufficiently carry out rinsing when rinsing (spinning rinsing, stagnant rinsing and flooding rinsing) is carried out after spinning has been done following washing and the like. CONSTITUTION:Water coming out of a feed pipe 9 is forwarded to the side wall inner surface of a washing and spinning tub 3 by the action of a flood direction changing body 24. In this case, since the flood direction changing body 24 is in a circular arc shape which is roughly coaxial with the side wall of the washing and spinning tub 3, water is formed into a circular arc shape so as to be circulated along the side wall inner surface of the washing and spinning tub 3. Furthermore, the washing and spinning tub 3 is rotated at low speeds when water is fed. Therefore, even if washing C is stuck on the entire circumferential side wall inner surface of the washing and spinning tub 3 because of spinning, water is well splashed over the whole of the washing C, so that spinning rinsing is thereby sufficiently carried out.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a washing machine.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 55-26908 discloses a structure in which a washing / dehydrating tub having an open upper surface is arranged in an outer tub having an open upper surface. From the above, there is shown a washing machine which supplies water to the washing and dehydrating tub through the upper openings of these tubs toward the center thereof.

However, with such a method of water supply, for example, when performing dewatering and rinsing after washing and dewatering, dewatering and rinsing cannot be satisfactorily performed.

That is, in the dehydration before the dehydration rinsing, the laundry is stuck to the inner surface of the side wall of the washing / dehydrating tub. On the other hand, dehydration rinsing is performed by supplying water to the washing / dehydrating tub for a limited time until water soaks into the entire laundry, stopping water supply after that time and rotating the washing / dehydrating tub at high speed. By this dehydration, the detergent is flushed with water and rinsed. In this dehydration rinsing, water supply is sufficient to allow water to soak into the laundry, the amount of water used can be suppressed, and water can be saved.

Therefore, although water is supplied only for a limited time such that the water soaks into the laundry, most of the water flows down toward the center of the washing / dehydrating tub, so that the side wall of the washing / dehydrating tub is provided. It does not hang on the laundry clinging to the inner surface very much, and even if dehydration is performed in this state, the detergent cannot be sufficiently splashed with the water. Therefore, satisfactory dehydration rinsing cannot be performed.

[0006] In the water supply method as described above, for example, after washing and dehydrating, a predetermined amount of water is accumulated in the washing / dehydrating tub while the water supply is stopped, and the rinsing and the predetermined amount of water are performed. Even after water is accumulated, water is continuously supplied to overflow the water.
Unable to perform a satisfactory rinse.

That is, even if a predetermined amount of water is accumulated in the washing / dehydrating tub and the laundry is soaked in the water, the state in which the laundry sticks to the inner surface of the side wall of the washing / dehydrating tub cannot be eliminated. Therefore, even if the rotary blades rotate in the rinsing stage, the movement of the laundry is not good at the beginning, resulting in insufficient rinsing, and satisfactorily rinsing cannot be performed.

[0008]

SUMMARY OF THE INVENTION In the present invention, for example, when performing rinsing (dehydration rinsing, rinsing rinsing or water pouring rinsing) after dehydration following washing or the like, the rinsing should be satisfactory without any deficiency. The purpose is to provide a washing machine that can

[0009]

The present invention provides a washing machine according to claim 1, wherein an outer tub having an open upper surface and an outer tub disposed in the outer tub and provided on a bottom wall when dehydrating laundry. A washing / dehydrating tub having an open top surface, which rotates at high speed around a rotation axis, and a water supply pipe for supplying water to the washing / dehydrating tub from above the outer tub and the washing / dehydrating tub through the top openings of these tubs, The water outlet direction changing body is provided at the water outlet of the water supply pipe and directs the water discharged from the water supply pipe from the water outlet to the inner surface of the side wall of the washing / dehydrating tub.

Further, in the washing machine of claim 2, the water outlet direction changing body has an arc shape substantially concentric with the side wall of the washing / dehydrating tub.

Further, as the washing machine of the third aspect, when water is supplied from the water supply pipe to the washing / dehydrating tub after dehydration, a control unit for rotating the washing / dehydrating tub at a low speed is provided.

[0012]

In the structure of claim 1, the water discharged from the water supply pipe is directed to the inner surface of the side wall of the washing / dehydrating tub by the function of the water discharge direction changing body. Accordingly, even if the laundry is stuck to the inner surface of the side wall of the washing / dehydrating tub due to dehydration subsequent to washing or the like, the water is well splashed on the laundry.

Therefore, the water is well soaked into the laundry at the time of supplying water during the dehydration rinsing, so that the dehydration rinsing can be satisfactorily performed without any shortage. Moreover, if the laundry that has been hit by water and contains water is prone to fall into the inside of the washing / dehydrating tub or actually falls down, then the portion of the laundry that has been stuck to the inner surface of the side wall of the washing / dehydrating tub is exposed. Water is also applied directly to the lever, so that the water can soak into the laundry better, and dehydration rinsing can be performed more satisfactorily.

In addition, in the case of rinsing and rinsing with water as well, similarly to the case of supplying water, the laundry easily falls or actually falls inside the washing / dehydrating tub, and the clinging of the laundry is substantially eliminated. Therefore, in the actual rinsing stage, the movement of the laundry is good from the beginning, and the rinsing with water and the rinsing with water are performed satisfactorily.

According to the second aspect of the present invention, since the water outlet direction changing body has an arc shape substantially concentric with the side wall of the washing / dehydrating tub, the water has an arc shape and follows the inner surface of the side wall of the washing / dehydrating tub. As a result, the laundry easily falls on the inside of the washing / dehydrating tub or actually falls well.

According to the third aspect of the invention, when water is supplied after spin-drying after washing or the like (for rinsing), the washing / dehydrating tub rotates at a low speed, so that the laundry is entirely covered on the inner surface of the side wall of the washing / dehydrating tub. Even with clinging around the circumference (usually this is the case), the same conditions occur with water being sprinkled throughout the laundry as described above, with more satisfactory dewatering, pooling and rinsing.

[0017]

FIG. 1 shows the structure of a fully automatic washing machine according to an embodiment of the present invention. Reference numeral 1 is a machine frame, and 2 is an outer tank having an open upper surface, which is suspended and supported by four suspension bars (not shown) in the machine frame 1. A washing / dehydrating tub 3 having a large number of dewatering holes 4 on the periphery and arranged in the outer tub 2 and having the same upper surface is opened. The washing / dehydrating tub 3 is provided with a rotary shaft 5 provided on the bottom wall.
Rotate around. Reference numeral 6 denotes a rotary blade rotatably arranged at the bottom of the washing / dehydrating tub 3, and 7 denotes a drive motor connected to the washing / dehydrating tub 3 and the rotary blade 6 via a power transmission mechanism 8. The drive motor 7 rotates only the rotary blades 6 at a low speed during washing and normal rinsing (reserve rinsing and water rinsing), and rotates the washing / dehydrating tub 3 when the laundry is dehydrated (including dehydration during dehydration rinsing). 5 is rotated in one direction at a high speed (at this time, the rotary blades 6 are also rotated at a high speed). Reference numeral 9 is a water supply pipe for supplying water from above the outer tub 2 and the washing / dehydrating tub 3 to the washing / dehydrating tub 3 through the top openings of these tubs, and 10 is an electromagnetic water supply provided in the middle of the water feeding pipe 9. A valve, 11 is a drainage pipe provided on the bottom wall of the outer tub 2, and 12 is an electromagnetic drainage valve provided in the middle of the drainage pipe 11. Reference numeral 13 is a water level sensor connected to an air trap 14 at the bottom of the outer tub 2 via a pressure hose 15. The water level sensor 13 detects the water level in the washing / dehydrating tub 3 and supplies it to the washing / dehydrating tub 3. You can see the amount of water given.

Reference numeral 16 is a water outlet of the water supply pipe 9. As shown in detail in FIG. 2, the water outlet portion 16 is composed of a water passage 18 having a large number of small holes 17 in the lower wall thereof, and a recess 19 located below the water passage 18. Reference numeral 20 denotes a detergent container which is mounted in the recess 19 of the water outlet 16 so as to be freely taken in and out from the front. The detergent container 20 is also shown in detail in FIG. A rear wall opening 21 is provided in the lower portion of the rear wall of the detergent container 20, and a gap 22 exists between the detergent container 20 and the lower wall of the recess 19 when the detergent container 20 is mounted in the recess 19. . The gap 22 communicates with the detergent container 20 through the rear wall opening 21. Reference numeral 23 denotes a handle used to pull out the detergent container 20 for charging the detergent, and the handle 23 is formed integrally with the detergent container 20. Reference numeral 24 denotes a water outlet direction changing body integrally formed with the detergent container 20 on the rear side of the handle 23. The water outlet direction changing body 24 is provided in the water outlet 16 when the detergent container 20 is mounted. . The water discharge direction changing body 24 has an inclined shape which approaches the side wall of the washing / dehydrating tub 3 as it descends, and has an arc shape substantially concentric with the side wall of the washing / dehydrating tub 3 as shown in FIG.

Thus, when the detergent container 20 is preliminarily charged with detergent during washing and the detergent container 20 is mounted in the recess 19, the water supply valve 10 is opened.
The tap water that has passed through the water supply pipe 9 reaches the outlet 16. Then, the tap water drops from the water passage 18 into the detergent container 20 through a large number of small holes 17, and the detergent container 2
0 through the rear wall opening 21 together with the detergent inside
Flow to. After that, tap water containing detergent, that is, washing water, is discharged from the front of the gap 22 to the outside of the water outlet 16 and is supplied to the washing / dehydrating tub 3.

In the case of rinsing (accumulation rinsing, water rinsing, dehydration rinsing), the detergent container 20 is mounted in the recess 19 with all the detergent flowing out during washing. Then, when the water supply valve 10 is opened, the tap water reaches the water outlet portion 16 and drops from the water passage 18 into the detergent container 20 through the small hole 17 as described above. But,
Since there is no detergent in the detergent container 20 anymore, tap water flows through the rear wall opening 21 into the gap 22 as it is, and the water outlet 16
It goes out and is supplied to the washing and dehydrating tub 3.

The water discharged from the water outlet 16 of the water supply pipe 9 and supplied to the washing / dehydrating tank 3 is the water outlet direction changing body 24.
By the action, that is, in accordance with the inclination and the arc shape of the water outlet direction changing body 24, the water outlet portion 16 is slightly expanded in an arc shape like a dotted portion W in FIG. 4 toward the inner surface of the side wall of the washing and dehydrating tub 3 (pushed back). Fall). A solid line A in FIG. 1 shows a water drop path at this time.

FIG. 5 shows a block circuit of the washing machine. 25
Is a control unit including a microcomputer that controls the washing machine. The control unit 25 drives and controls the drive motor 7, the electromagnetic water supply valve 10, and the electromagnetic drainage valve 12 based on the key input signal from the key input unit 26, the detection result of the water level sensor 13, and the like.

FIG. 6 shows a basic operating procedure of the washing machine.
The control unit 25 first executes the washing process, then sequentially executes the dehydration rinsing process and the normal rinsing process (reserve rinsing), and finally executes the dehydration process.

FIG. 7 shows the flow of the program incorporated in the control unit 25. The operation of the washing machine will be described below with reference to FIG. When a start key signal arrives based on the operation of the start key on the key input unit 26, the control unit 2
5 starts the operation, and first executes the washing process. In this washing process, the control unit 25 supplies water by opening the water supply valve 10 until the water level sensor 13 detects a predetermined water level (until a predetermined amount of water is accumulated in the washing / dehydrating tub 3) ( S1 step). At this time, since the detergent is previously put in the detergent container 20 at the time of washing, the washing water is supplied to the washing / dehydrating tub 3 as described above. Then, when the predetermined water level is detected, the water supply valve 10 is closed. Then, when a predetermined amount of water is accumulated, the control unit 25 rotates only the rotary vanes 6 at a low speed under the drive of the drive motor 7, whereby washing is performed (S2 step).

When the washing process is completed, the control unit 25 then executes the dehydration rinsing process. In the dewatering and rinsing step, first, the drain valve 12 is opened to drain the washing water at the time of washing, and the washing / dehydrating tub 3 is rotated at high speed together with the rotary blades 6 to dewater the laundry (step S3). When this is finished, dehydration rinsing is executed (S4 step). The drainage valve 12 maintains an open state.

That is, referring to FIG. 8, the control unit 25 opens the water supply valve 10 to supply water for a predetermined time t. Then, during this water supply, the control unit 25 controls the drive motor 7
Drive for 1 second and stop for 5 seconds are repeated. At this time, the washing / dehydrating tub 3 repeats immediately entering the inertial rotation state when trying to rise to the high-speed rotation state together with the rotary blades 6. After all, the washing and dehydrating tub 3 rotates slowly.

Therefore, water is supplied while the washing / dehydrating tub 3 slowly rotates. In this case, even if the laundry C sticks to the inner surface of the side wall of the washing / dehydrating tub 3 due to the dehydration in step S3 immediately after the washing, the water is directed to the outlet direction changing body 24.
By the action of the above, that is, in accordance with the inclination and the arc shape of the water discharge direction changing body 24, the water spreads in the arc shape to the inner surface of the side wall of the washing / dehydrating tub 3 as described above. Go out. When the time t has elapsed, the water is in a state of being sufficiently soaked.

Thereafter, the water supply valve 10 is closed, and the control section 25 drives the drive motor 7 for a fixed time (for example, 5 minutes),
The washing / dehydrating tub 3 is rotated at high speed for dehydration. As a result, the detergent is splashed with the water soaked in it.

Assuming that the above-described series of flow of supplying water while slowly rotating the washing / dehydrating tub 3 and then dehydrating it is one cycle, two cycles are executed in the dehydration rinsing in step S4. In this case, even when the laundry C is stuck to the inner surface of the side wall of the washing / dehydrating tub 3 due to the dehydration of the first cycle, water is also well impregnated into the laundry and soaks in during the water supply in the second cycle. .

Thus, in the water supply in each cycle of the dehydration rinsing, the laundry is soaked well with water, and the dehydration rinsing is sufficiently performed. Moreover, the laundry C hit by water and containing water easily falls into the inside of the washing / dehydrating tub 3 or actually falls down, and then the laundry C sticks to the inner surface of the side wall of the washing / dehydrating tub 3. The exposed part exposes the part directly to the water, so that the water can penetrate the laundry better and the dewatering rinse is more satisfactory.

Further, since the water outlet direction changing body 24 has an arc shape substantially concentric with the side wall of the washing / dehydrating tub 3, the water has an arc shape and follows the inner surface of the circular side wall of the washing / dehydrating tub 3, Therefore, the water is better applied to the laundry C sticking to the inner surface of the side wall of the washing / dehydrating tub 3, and the laundry is more likely to fall into the inside of the washing / dehydrating tub 3 or actually falls well.

Further, in the case of water supply during dehydration and rinsing, the washing / dehydrating tub 3 rotates at a low speed, so that even if the laundry C sticks all around the inner surface of the side wall of the washing / dehydrating tub 3 (usually The same situation occurs when water is applied to the entire laundry as described above, and the dehydration rinsing is performed more satisfactorily.

When the dehydration rinsing step is completed, the control section 25 subsequently executes a normal rinsing (reserving rinsing) step. In this process, as in the case of the washing process, the control unit 25 opens the water supply valve 10 and supplies the tap water from the tap until the water level sensor 13 detects the predetermined water level (S5 step). . The drain valve 12 is closed in advance just before the dehydration rinsing process. When a predetermined water level is detected,
The water supply valve 10 is closed. Then, when a predetermined amount of water is accumulated, the control unit 25 rotates only the rotary blades 6 under the drive of the drive motor 7, whereby the rinsing is performed (S6 step).

For this reason, also in rinsing, the water is well splashed on the laundry and soaked in during the water supply as well. Then, the laundry that has been hit by water and contains water is prone to fall inside the washing / dehydrating tub 3 or actually falls down, and the laundry is washed by the second cycle of the dehydration rinsing in the step S4 so that the laundry can be washed. Even if it sticks to the inner surface, this sticking is largely eliminated. Therefore, in the actual rinsing stage, the laundry moves well from the beginning, and the rinsing is performed satisfactorily.

Furthermore, since the water outlet direction changing body 24 has an arc shape which is substantially concentric with the side wall of the washing / dehydrating tub 3, the water has an arc shape and follows the inner surface of the circular side wall of the washing / dehydrating tub 3, Therefore, the water is better applied to the laundry that has been attached to the inner surface of the side wall of the washing / dehydrating tub 3, and the attachment of the laundry is further eliminated.

Further, in the case of water supply during rinsing and rinsing, when the washing / dehydrating tub 3 is rotated at a low speed as in the case of dewatering rinsing, the laundry is stuck around the entire inner surface of the side wall of the washing / dehydrating tub 3. Also (usually this is the case), water is splashed throughout the laundry, and the clinging of the laundry is more eliminated.

When the normal rinsing process is completed, the controller 25 finally executes the dehydration process. In the dehydration process, first, the drain valve 12 is opened to drain the water for rinsing (S7 step). When the drainage ends, the control unit 2
In step 5, the washing / dehydrating tub 3 is rotated at a high speed to execute dehydration (step S8). The drainage valve 12 maintains an open state.
The operation ends when the dehydration process ends.

In the above embodiment, the rinsing process is usually performed in the rinsing step, but water rinsing may be performed instead of the rinsing process.

[0039]

According to the washing machine of claim 1 of the present invention, the water discharged from the water supply pipe is directed to the water outlet of the water supply pipe toward the inner surface of the side wall of the washing / dehydrating tub. Since the direction changer is provided, even if the laundry sticks to the inner surface of the side wall of the washing / dehydrating tub due to dehydration following washing, the water is well splashed on the laundry, and therefore rinse (dewatering rinse, rinsing rinse, water injection) is performed. Rinsing can be performed satisfactorily.

According to the washing machine of the second aspect, since the water outlet direction changing body has an arc shape which is substantially concentric with the side wall of the washing / dehydrating tub, the laundry is better covered with water and further rinsed is satisfied. It can be carried out.

According to the washing machine of the third aspect, when water is supplied to the washing / dehydrating tub after dehydration, the washing / dehydrating tub is rotated at a low speed, so that the laundry is flashed over the entire inner surface of the side wall of the washing / dehydrating tub. Even if it is attached, the entire laundry is well watered,
Furthermore, rinsing can be performed satisfactorily.

[Brief description of drawings]

FIG. 1 is a sectional view of a fully automatic washing machine according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a water supply pipe of the washing machine in the vicinity of a water outlet.

FIG. 3 is a perspective view of a detergent container of the washing machine.

FIG. 4 is a cross-sectional plan view showing the relationship between the water outlet direction changing body and the washing / dehydrating tub of the washing machine.

FIG. 5 is a block circuit diagram of the washing machine.

FIG. 6 is a sequence diagram showing a basic operating procedure of the washing machine.

FIG. 7 is a flow chart of a program incorporated in a control unit of the washing machine.

FIG. 8 is a timing diagram showing a drive timing of main parts at the time of spin-drying rinse of the washing machine.

[Explanation of symbols]

 2 Outer tank 3 Washing / dehydrating tank 7 Drive motor 9 Water supply pipe 10 Electromagnetic water supply valve 16 Water outlet port 20 Detergent container 24 Water outlet direction changer 25 Control unit

Claims (3)

[Claims] 1. An outer tub with an open upper surface, and a washing / dismounting unit with an open upper surface, which is arranged in the outer tub and rotates at a high speed around a rotary shaft provided on the bottom wall when dehydrating laundry. A water tank, a water supply pipe for supplying water to the washing and dehydrating tank from above the outer tank and the washing and dehydrating tank through the upper openings of these tanks, and a water supply pipe provided at the water outlet port of the water supplying pipe. A washing machine comprising: a water outlet direction changing body for directing water from the water outlet portion toward an inner surface of a side wall of the washing / dehydrating tub. 2. The washing machine according to claim 1, wherein the water outlet direction changing body has an arc shape substantially concentric with a side wall of the washing / dehydrating tub. 3. The washing machine according to claim 1, further comprising a control unit for rotating the washing / dehydrating tub at a low speed when water is supplied from the water supply pipe to the washing / dehydrating tub after dehydration.