JP2001190883A - Washing machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a washing machine capable of saving water without reducing the washing capacity. SOLUTION: In a washing machine for washing laundry by intermittently rotating a washing / dewatering tub 3 rotatably provided in a receiving cylinder 1 or changing the number of revolutions, a washing water pump inlet. Inlet from 15 pump outlet 17
From the washing and dewatering tub 3 with a pump 14
In the washing / rinsing process, the washing water circulates while passing through the laundry to remove dirt, thereby enabling washing with a small amount of water. By providing the pump suction port 15 in front of the drain valve 16, the washing water on the lowermost surface of the washing and dewatering tub 3 can be sucked. Further, the pump 14 is provided at a position higher than the drain valve 16, and the pump path is further increased. By preventing the washing water from accumulating in the pump 18, the washing water is prevented from accumulating in the pump 14 or the pump path 18 at the time of drainage, thereby preventing damage to the pump 14 due to freezing, water leakage, and generation of offensive odor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine for washing an object to be washed in a washing and dewatering tub.

[0002]

2. Description of the Related Art A conventional washing machine will be described below with reference to the drawings. FIG. 3 is a side sectional view showing a configuration of a conventional washing machine. Conventionally, in a washing machine that changes the centrifugal force applied to the washing water and the laundry to be washed in the washing and dehydration tub by intermittent operation of the washing and dehydration tub, or operation that changes the number of revolutions, A receiving cylinder 1, a receiving cylinder cover 2 provided on an upper part of the receiving cylinder 1, and a driving means 4 for driving a washing and dewatering tub 3 rotatably disposed in the receiving cylinder 1, wherein the driving means 4 By rotating the washing and dewatering tub 3, the washing water is raised between the washing and dewatering tub 3 and the receiving cylinder 1, and the washing and dewatering tub 3 is moved from between the receiving cylinder cover 2 and the washing and dewatering tub 3. It has a process of watering and washing.

[0003] Therefore, on the side of the washing and dewatering tub 3,
A large number of holes 5 are provided for allowing washing water to pass from the washing and dewatering tub 3 into the receiving cylinder 1. The hole 5 serves as a dehydration hole for allowing washing water to pass from the washing and dewatering tub 3 into the receiving cylinder 1 when the driving means 4 rotates the washing and dehydration tub 3 at high speed to perform centrifugal dehydration. Is also working.

[0004]

In such a conventional washing machine, the receiving cylinder 1 is rotated by rotating the washing / dewatering tub 3.
The washing water is raised between the washing and dewatering tub 3 and the washing and dewatering tub 3 is sprinkled from the space between the receiving cylinder cover 2 and the washing and dewatering tub 3 for washing. There is also a problem that the washing water is filled between the tank and the dewatering tub 3 and a large amount of washing water is required.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a washing machine capable of saving water while maintaining the cleaning power.

[0006]

According to the first aspect of the present invention, there is provided a washing and dewatering tub rotatably disposed in a receiving cylinder, a driving means for rotating and driving the washing and dewatering tub, and the driving means. And a pump for sucking the washing water in the washing and spin-drying tub, sprinkling water into the washing and spin-drying tub, and returning the washing water to pass through the laundry in the washing and spin-drying tub. It is a washing machine that removes dirt by circulating.

According to the present invention, the washing and dewatering tub is rotated during the washing to change the centrifugal force applied to the washing water and the laundry to wash the laundry without damaging the laundry and tangling the laundry. Regardless of the rotation of the water tub, the washing water is circulated and sprinkled even at a low water level, so that washing can be performed efficiently and water can be saved.

The present invention according to claim 2 is the washing machine according to claim 1, wherein a pump suction port of a pump is provided at a position of a drain valve for draining water from the washing and dewatering tub.

According to the present invention, washing water can be reliably sucked even at a low water level, and water can be saved.

The present invention according to claim 3 is the washing machine according to any one of claims 1 and 2, wherein the pump is disposed higher than the position of the drain valve.

According to the present invention, in addition to the above operation, the washing water in the pump can be reliably drained at the time of drainage.

According to a fourth aspect of the present invention, there is provided the washing machine according to any one of the first to third aspects, wherein the washing water does not stay in a pump path connecting the pump to the pump suction port.

According to the present invention, in addition to the above-described operation, water can be drained without retaining water in the pump path at the time of drainage.

According to a fifth aspect of the present invention, there is provided the washing machine according to any one of the first to fourth aspects, wherein the pump path is integrated with the receiving cylinder.

According to the present invention, it is possible to provide a washing machine which has a simple structure, can be manufactured at a low cost, and hardly causes water leakage.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention according to the first aspect, the pump is means for sucking the washing water and circulating the washing and dewatering water from the washing and dewatering tub. Is provided in front of the drain valve, the suctioned washing water is pumped up, and water is sprayed from a pump discharge port provided above the opening of the washing and dewatering tub. The sprinkled washing water passes through the laundry in the washing / dewatering tub, removes dirt from the laundry during the passage, and is again circulated so as to be sucked from the pump suction port and sprayed. The washing action is realized even when there is no circulation of the washing water passing between the receiving cylinder and the washing and dewatering tub and passing through the receiving cylinder cover. In the embodiment, the case where there is no hole in the conventional example other than the overflow port is described, but it goes without saying that some holes may be provided.

According to the second aspect of the present invention, the pump suction port is provided at the position of the drain valve so as to reliably suck the washing water on the lowermost surface of the washing and dewatering tub. In the embodiment, the pump is located immediately before the drain valve. Although a suction port is provided, it is not limited to this.

According to the third aspect of the present invention, the pump is provided at a position higher than the drain valve so that washing water does not stay in the pump.

In the present invention according to claim 4, the pump path is a path connecting the pump and the pump suction port, and is configured such that washing water does not stay in this pump path. In the embodiment, a linearly inclined pump path is used, but the present invention is not limited to this.

In the invention according to claim 5, the pump path is integrated with the receiving cylinder, but the structure for realizing the pump path is not limited.

Hereinafter, embodiments of the present invention will be described.

[0022]

(Embodiment 1) Hereinafter, Embodiment 1 of a washing machine of the present invention will be described with reference to the drawings. This embodiment relates to claim 1.

FIG. 1 is a side sectional view showing the structure of this embodiment. The same components as those in the conventional example shown in FIG. In FIG. 1, a receiving cylinder 1 suspended by a suspension 7 is provided inside a main body 6,
The vibration during dehydration is absorbed by the suspension 7. A washing and dewatering tub 3 is rotatably arranged in the receiving cylinder 1. The washing and dewatering tub 3 has a stirring blade 8 for stirring the laundry to be rotatably arranged on the inner bottom thereof. Drive means 4
Is composed of a speed reduction mechanism (not shown) and a drive motor 9. The deceleration mechanism is included in the dehydrating shaft 10 and is a deceleration mechanism for reducing the number of revolutions by a group of gears. In order to prevent abnormal rotation due to imbalance of the washing and dehydrating tub 3 during dehydration, preferably a plurality of gears are provided. A reduction mechanism using planetary gears arranged symmetrically is used. The washing shaft 11 is connected to the output side of the speed reduction mechanism, and the washing side input shaft (not shown) is connected to the input side. The dehydrating shaft 10 including the speed reduction mechanism is included in a case 12.

The drive motor 9 rotates the spinning shaft 10 and the washing-side input shaft. Further, a clutch mechanism for transmitting or not transmitting the rotation of the drive motor 9 to the dehydrating shaft 10 is included. The driving means 4 is fixed to the bottom side of the receiving cylinder 1, and the rotation speed is controlled by the control means 13. The pump 14 has a pump suction port 15 in front of a drain valve 16 and a pump discharge port 17 above the washing and dewatering tub 3. Reference numeral 18 denotes a pump path connecting the pump 14 and the pump suction port 15; 19, a drain port;
Reference numeral 0 denotes an overflow port provided at the upper edge of the washing and dewatering tub 3.

The drive motor 9 may be of an inner rotor type, an outer rotor type, or a type in which a stator and a rotor are vertically opposed. Further, a driving means directly driven by the driving motor 9 without the speed reduction mechanism may be used. Further, the pump suction port 15 is connected to the receiving cylinder 1 or the washing / dewatering tub 3 and the drain valve 1.
6 may be present.

The operation of the above configuration will be described.
First, in the washing / rinsing process, the control means 13
The centrifugal force acting on the washing water and the laundry is changed by intermittently rotating the washing / dewatering tub 3 or changing the number of rotations by the driving means 4. As a result, the washing water moves back and forth between the vicinity of the lateral wall in the washing and dewatering tub 3 and the vicinity of the center. Further, the washing water pumped by the pump 14 is sprinkled from the pump discharge port 17, and when the rinsing is performed while overflowing the washing water from the washing / dewatering tub 3 to the receiving cylinder 1 through the overflow port 20, the overflow water is used. Is drained from the drain port 19, the remaining overflow water rises between the washing and dewatering tub 3 and the receiving cylinder 1, and the receiving cylinder cover 2 and the washing and dewatering tub 3
And water is sprinkled into the washing and dewatering tub 3. By these operations, the washing water passes through the laundry and cleans the laundry, and the washing and rinsing proceeds.

When the washing and rinsing steps are completed, a dehydration step is started. In the dewatering process, the water in the washing and dewatering tub 3 is discharged to the drain 1
Drained through 9. At this time, the rotation of the drive motor 9 is transmitted to the dewatering shaft 10, and the stirring blade 8 and the entire washing and dewatering tub 3 rotate integrally, and the centrifugal force generated by the rotation of the washing and dewatering tub 3 causes the washing and dewatering. After the rinsing process, the moisture of the laundry is squeezed out, and the laundry is automatically dehydrated.

In this manner, the laundry put into the washing / dewatering tub 3 completes the washing / rinsing step and the dehydrating step.

As described above, according to the present embodiment, the pump 1
4, the washing water is sucked from just before the drain valve 16 and sprinkled back to the washing and dewatering tub 3 to rotate the washing and dewatering tub 3 during the washing and rinsing steps. Even in the case of a low water level where water cannot be sprinkled into the washing and dewatering tub 3 from between the washing and dewatering tub 3, the washing water pumped by the pump 14 can be sprinkled from the pump discharge port 17,
It is possible to realize an effect of washing the laundry to pass through the laundry and remove dirt from the laundry.

The rotation of the washing and dewatering tub 3 causes the washing water to rise between the washing and dewatering tub 3 and the receiving tube 1, and from between the receiving tube cover 2 and the washing and dewatering tub 3. Although the washing water is sprinkled into the inside, the washing water pumped by the pump 14 is sprinkled from the pump discharge port 17, so that the amount of washing water passing through the laundry can be increased, and the washing power can be improved.

Since the washing water can be sprinkled on the laundry regardless of the rotation speed of the washing and dewatering tub 3, the laundry can be constantly wet with the washing water regardless of the rotation speed of the washing and dehydration tub 3. Washing time can be reduced.

(Embodiment 2) A washing machine according to Embodiment 2 of the present invention will be described below with reference to the drawings. This embodiment relates to claim 2. Note that the configuration of this embodiment is the same as that of the first embodiment, and a detailed description is omitted. As shown in FIG. 1, a pump suction port 15 of the pump 14 is provided at a position before the drain valve 16.

The operation of the above configuration will be described.
In the washing / rinsing process, the washing water is supplied to the washing and dewatering tub 3
The water is sucked by the pump 14 from just before the drain valve 16 located below the lowermost surface of the pump, pumped up, sprinkled from the pump discharge port 17, and passes through the laundry to remove dirt. Further, since the pump 14 pumps up the washing water on the lowermost surface of the washing and dewatering tub 3 and sprays water from above the washing and dewatering tub 3, the washing water can be efficiently circulated.

As described above, according to the present embodiment, the pump 1
Reference numeral 4 denotes that the washing water on the lowermost surface of the washing and spin-drying tub 3 is pumped up and sprinkled from above the washing and spin-drying tub 3, so that the washing water passes through all the laundry in the washing and spin-drying tub 3. By doing so, dirt can be removed and washing water can be efficiently circulated.

Embodiment 3 Hereinafter, a third embodiment of the washing machine of the present invention will be described with reference to the drawings. This embodiment relates to claim 3. Note that the configuration of this embodiment is the same as that of the first embodiment, and a detailed description is omitted. As shown in FIG. 1, the pump 14 is arranged at a position higher than the drain valve 16.

The operation of the above configuration will be described.
Since the pump 14 is disposed at a position higher than the drain valve 16 in the drain stroke, the washing water in the pump 14 is reliably drained. Therefore, the pump 14
Is prevented from being damaged. Further, it is possible to prevent water leakage from the pump 14 caused by washing water in the pump 14 for a long period of time.

As described above, according to the present embodiment, the pump 1
By arranging 4 at a position higher than the drain valve 16,
It can be drained so that there is no washing water staying in the pump 14,
Damage and water leakage due to freezing of the pump 14 can be prevented.

Embodiment 4 Hereinafter, a fourth embodiment of the washing machine of the present invention will be described with reference to the drawings. This embodiment relates to claim 4. Note that the configuration of this embodiment is the same as that of the first embodiment, and a detailed description is omitted. As shown in FIG. 1, the pump path 18 connecting the pump 14 to the pump suction port 15 is guided to the drain valve 16 with a predetermined inclination,
The washing water does not stay.

The operation of the above configuration will be described.
In the draining process, the washing water in the pump 14 and the pump path 18 is reliably drained. Therefore, it is possible to prevent the pump 14 from being damaged by freezing or the like. Further, it is possible to prevent an unpleasant odor caused by the presence of washing water in the pump path 18 for a long period of time, and to prevent the washing water from being spilled when the washing machine is transported.

As described above, according to this embodiment, since the washing water does not stay in the pump path 18, it is possible to drain the washing water so that there is no washing water staying in the pump 14. Breakage, water leakage, and generation of an unusual odor can be prevented.

Embodiment 5 Hereinafter, a fifth embodiment of the washing machine of the present invention will be described with reference to the drawings. This embodiment relates to claim 5.

FIG. 2 is a side sectional view showing the structure of this embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted. In FIG. 2, the pump 14
Is connected to the receiving cylinder 1.

This embodiment is different from the first to fourth embodiments in that the pump path 18 is integrated with the receiving cylinder 1. Other configurations are the same as those of the first to fourth embodiments, and the description is omitted.

According to this embodiment, there is no need to provide the pump path 18 separately from the receiving cylinder 1, so that the configuration can be simplified and the cost can be reduced.

[0045]

According to the first aspect of the present invention, there is provided a washing and dewatering tub rotatably disposed in the receiving cylinder, a driving means for rotating and driving the washing and dewatering tub, and controlling the driving means. Control means, and a pump for sucking the washing water in the washing and dewatering tub and sprinkling water back to the washing and dewatering tub, wherein the washing water circulates through the laundry in the washing and dewatering tub. In the washing and rinsing process, the washing machine is designed to remove dirt, thereby changing the centrifugal force applied to the washing water and the laundry by the rotation of the washing and dewatering tub, thereby tangling the laundry without damaging the laundry. The washing water is pumped from the pump outlet even when the washing and dewatering tub is rotated and the washing and dewatering tub rotates, so that the water cannot be sprinkled into the washing and dewatering tub from between the receiving cylinder cover and the washing and dewatering tub. Water can be sprinkled and washing water It can pass through the rinse and remove the dirt from the laundry, and the washing water can be circulated and sprinkled even at low water level regardless of the rotation of the washing and dewatering tub, so that washing can be performed efficiently, It can save water.

According to a second aspect of the present invention, a washing and dewatering tub is provided by providing the washing machine according to the first aspect having a pump suction port at a position of a drain valve for draining water from the washing and dewatering tub. The washing water pumped from the pump from the position of the drain valve below the lowermost surface of the water is sprayed from the pump discharge port, so that the washing water can be reliably sucked even at a low water level, and the washing water passes through the laundry. As a result, the effect of removing dirt from the laundry can be realized, and water can be saved.

The present invention according to claim 3 provides the washing machine according to any one of claims 1 and 2, wherein the pump is disposed higher than the position of the drain valve. The washing water can be reliably drained, and damage to the pump and water leakage due to freezing can be prevented.

According to a fourth aspect of the present invention, there is provided the washing machine according to any one of the first to third aspects, wherein the washing water does not stay in a pump path connecting the pump to the pump suction port. In addition to the above action, water can be drained without water remaining in the pump path during drainage,
It is possible to prevent the generation of offensive odor due to the retained washing water.

According to a fifth aspect of the present invention, the washing machine according to any one of the first to fourth aspects, in which the pump path is integrated with the receiving cylinder, has a simple structure and can be manufactured at low cost. It is possible to realize a washing machine that is unlikely to cause water leakage and the like.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a configuration of Embodiments 1 to 4 of a washing machine of the present invention.

FIG. 2 is a side sectional view showing a configuration of a washing machine according to a fifth embodiment of the present invention.

FIG. 3 is a side sectional view showing a configuration of a conventional washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiving cylinder 2 Receiving cylinder cover 3 Washing and dewatering tub 4 Driving means 5 Hole 6 Main body 7 Suspension 8 Stirring blade 9 Drive motor 10 Dehydrating shaft 11 Washing shaft 12 Case 13 Control means 14 Pump 15 Pump suction port 16 Drain valve 17 Pump discharge Outlet 18 Pump path 19 Drainage port 20 Overflow port

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Nobuichi Nakajima 1006 Kazuma Kadoma, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. (reference) FD02 FD08 HB06 MA01

Claims (5)

[Claims] 1. A receiving cylinder, a washing and dewatering tub rotatably disposed in the receiving cylinder, a driving means for rotating and driving the washing and dewatering tub, a control means for controlling the driving means, A pump for sucking the washing water in the washing and spin-drying tub and sprinkling water back into the washing and spin-drying tub, wherein the washing water circulates through the laundry in the washing and spin-drying tub to remove dirt. Washing machine to drop. 2. The washing machine according to claim 1, further comprising a pump suction port provided at a position of a drain valve for draining water from the washing and dewatering tub. 3. The washing machine according to claim 1, wherein the pump is disposed higher than a position of the drain valve. 4. The washing machine according to claim 1, wherein the washing water does not stay in a pump path connecting the pump to the pump suction port. 5. The pump path is integrated with a receiving cylinder.
The washing machine according to claim 4.