JP2768597B2 - Washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine in which a washing tub is provided, and a washing and dewatering tub in which a pulsator is rotatably arranged at the bottom is provided in the washing tub, and the pulsator is rotated during washing. The present invention relates to a washing machine provided with a motor for driving and rotating the washing and dewatering tub at the time of driving and spinning.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, a washing and dewatering tub 31 has a pulsator 32 disposed rotatably at the center of the bottom and a dewatering hole 33 formed near the upper part of the peripheral wall. And 34, a washing tub having the washing and dewatering tub 31 therein.
5 is a driving motor for rotating the pulsator 32 and the washing tub 34, 36 is a washing shaft connecting the driving motor 35 and the pulsator 32, 37 is a dehydrating shaft having the washing shaft 36 inserted therein, and 38 is a dehydrating shaft. This is a coupling connecting the shaft 37 and the washing and dewatering tub 31. The washing is performed by rotating the pulsator 32 by the driving motor 35 at the time of washing, and the washing and dewatering tub 31 is driven by the driving motor 32 at the time of dehydration. Dehydration was performed by rotating and driving.

Reference numeral 39 denotes a drain hole for draining the washing liquid in the washing and dewatering tub 31 formed in the coupling 38; 40, a drain port provided in the washing tub 34;
Is a seal receiver which is located below the coupling 38 and connects the drain port 40 and the drain hole 39, 42 is an oil seal fixed to the seal receiver 41 and in circumferential contact with the coupling 38, 43 is The seal packing 44 provided between the seal receiver 41 and the washing tub 34 is a drainage joint connected to the drainage port 40, and the drainage joint 44 is provided with a drainage hose 45.

A drain valve 46 is provided between the drain joint 44 and the drain hose 45, and an air trap 47 is provided in the drain joint 44.
4 was connected to a pressure sensor 49 via a pipe 48.

In such a washing machine, the detergent is poorly dissolved in the washing water, and bubbles are supplied to the washing water in order to promote the dissolution of the detergent and the penetration of the washing liquid into the clothes, and to improve the washing effect. Washing machines have been proposed.

A conventional example of a washing machine having a structure for supplying air bubbles to the washing water will be described below with reference to FIG. A washing and dewatering tub 50 having a large number of dewatering holes is rotatably mounted inside a washing receiving tub 51, and a pulsator 52 is rotatably disposed at the center of the bottom of the washing and dewatering tub 50. Had been added.

That is, an air inlet 53 is formed in the lower part of the washing tub 51, a nozzle 54 for generating air bubbles is inserted into the air inlet 53, and air is supplied to the nozzle 54. The air pump 55 was connected.

The nozzle 54 is disposed between the bottom of the washing and dewatering tub 50 and the washing tub 52 and has a discharge port 56.
Is located below the pulsator 52. At the bottom of the washing and dewatering tub 50, a mounting flange 58 having a passage hole 57 for passing a water flow and bubbles is fixed, and a bubble passage hole 59 is provided at the center of the pulsator 52.
Was formed. As a result, the bubbles supplied from the nozzle 54 are removed from the bubble passage holes 59 of the pulsator 52.
The washing and dewatering tub 50 is supplied to the
Was rising inside.

The suction inlet 53 is formed on the side of the washing tub 52 at a position lower than the bottom of the washing and dewatering tub 50, and at the outer end of the washing tub 52 through a supply pipe 60 through an air pump 55. And the nozzle 54 at the inner end.
Was fitted outside. A drive circuit 61 is connected to the air pump 55, and the air pump 55 is operated in accordance with the rotation of the pulsator 52 to control the air to be pumped to generate air bubbles.

[0010]

In the construction of the conventional washing machine having a structure for generating bubbles, the washing water at the time of washing is filled not only in the washing and dewatering tub but also in the outer washing tub. However, there is a problem that much washing water is required.

In order to eliminate this problem, there is a type in which a dewatering hole is formed only near the upper part of the peripheral wall of the washing and dewatering tub. No washing water was filled in the washing tub in such a washing machine, and air bubbles could not be supplied to the washing and dewatering tub.

The washing machine of the present invention has been made in view of the above-described problem, and generates air bubbles in the washing and dewatering tub in a washing and dehydrating tub having a dewatering hole formed only near the upper peripheral wall of the washing and dewatering tub. It is intended to make it possible.

[0013]

In order to achieve the above object, a washing machine according to the present invention has a washing tub disposed on a main body of the washing machine, and a pulsator disposed rotatably at the bottom of the washing tub. A washing and spin-drying tub having a spin-drying hole formed only in the vicinity of the upper peripheral wall, and a motor for rotating the pulsator during washing and rotating the spin-drying and spinning tub during spinning; A coupling for connecting the bottom of the washing machine and a dehydrating shaft provided on the motor, a drain for draining the washing liquid in the washing and dewatering tub is provided on the coupling, and the drain and the bottom of the washing receiving tub are provided. A seal receiver is provided for connecting to a drain port provided in the drain port, a drain hose for draining the washing liquid out of the washing machine body is connected to the drain port, and a drain valve is provided between the drain port and the drain hose, An air pump is provided between the drain valve and the drain port. It is provided supply port for supplying air from.

[0014]

In the washing machine having the above construction, the air from the air pump is supplied from the supply port to the space between the drain valve and the drain port, and the supplied air becomes bubbles and passes through the seal receiver and the drain hole of the coupling to perform the washing. Supplied into the dewatering tub, it promotes dissolution of the detergent in the washing water in the washing and dewatering tub and penetration of the washing liquid into the clothes, thereby improving the cleaning effect.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the washing machine of the present invention will be described with reference to FIG. 1 is a washing and dewatering tub having a pulsator 2 rotatably disposed at the center of the bottom and having a dewatering hole 3 formed only near the upper part of the peripheral wall. 4 is a washing receiving tub in which the washing and dewatering tub 3 is provided. A drive motor for rotating and driving the pulsator 2 and the washing tub 4; a washing shaft 6 connecting the drive motor 5 and the pulsator 2; a dehydrating shaft 7 having the washing shaft 6 inserted therein; A coupling connecting the washing and dewatering tub 1;
To rotate the pulsator 2 to perform washing,
At the time of spin-drying, the drive motor 2 rotates the washing and spin-drying tub 1 to spin-dry.

Reference numeral 9 denotes a drain hole for draining the washing liquid in the washing and dewatering tub 1 formed in the coupling 8;
Is a drain port provided in the washing tub 4, and 11 is located below the coupling 8, the drain port 10 and the drain hole 9 are provided.
, An oil seal fixed to the seal receiver 11 and in circumferential contact with the coupling 8, a seal packing 13 provided between the seal receiver 11 and the washing tub 4, 14 Is an L-shaped drainage joint connected to the drain port 10;
Is provided with a drain hose 15.

An air supply port 16 is formed in a side wall of the drainage joint 14, and a supply pipe 18 connected to an air pump 17 is fitted on an outer end of the air supply port 16 so that air bubbles pass through the pulsator 2. A plurality of holes 19 are provided. Reference numeral 20 denotes a drain valve provided between the drainage joint 14 and the drainage hose 15, 21 denotes an air trap provided in the drainage joint 14, and a pressure sensor 23 is connected to the air trap 21 via a pipe 22. It is connected.

The air pump 17 is housed in an upper plate 24, and a supply pipe 18 is connected to a discharge side thereof. The supply pipe 18 is connected to a support rod 25 which suspends the washing tub 4 from outside the washing tub 4. Along with the air supply port 16. The supply pipe 18 is connected to the air supply port 16 so that washing water does not remain inside the supply pipe 18.
The pipe is connected to the air pump 17 so that the height is always higher.

In particular, the air supply port 16 is connected to the washing tub 4.
Is provided at a lower position than the air supply port 1
Since the supply pipe 18 tends to be horizontal or U-shaped from 6 to the outer peripheral bottom of the washing tub 4, the supply pipe 1
The length of the pipe 8 is appropriately set, and the supply pipe 18 is fixed to the outer peripheral bottom of the washing tub 4. Further, a pump driving circuit 26 is connected to the air pump 17, and its operation is controlled by a control circuit (not shown).

In the above configuration, when washing is started, the drain valve 20 is closed, water is supplied to the washing tub 4, and the washing water is supplied to a water level corresponding to the amount of laundry.

When the supply of the washing water is completed, the pulsator 2 starts stirring and the air pump 17 is also energized, so that the air pumped from the air pump 17 drains from the air supply port 16 through the supply pipe 18. Is supplied into the washing liquid filled in the joint 14 and becomes bubbles, is supplied to the washing and spin-drying tub 1 through the seal receiver 11 and the drain hole 9 of the coupling 8, and is supplied to the washing and spin-drying tub 1. Bubbles are supplied to the washing liquid in the washing and spin-drying tub 1 through the bubble passage holes 19 of the pulsator 2 to promote the dissolution of the detergent in the washing liquid and the penetration of the washing liquid into the laundry (clothing), thereby improving the washing effect. Improve.

Thereafter, when draining is performed after the washing process is completed, the drain valve 20 is opened, and drain is performed through the drain hole 9, the seal receiver 11, the drain port 10, and the drain joint 14.
At this time, since the operation of the air pump 17 is also stopped, the washing liquid drained flows into the supply pipe 18, but as the drainage proceeds, the washing liquid in the supply pipe 18 also flows out and is drained. However, since the drainage action is due to gravity, the supply pipe 18 is provided with a slope so that the air supply port 16 is at the lowest position, thereby preventing the liquid remaining in the supply pipe 18. .

In order to reduce the amount of residual liquid into the supply pipe 18, the air pump 17 is operated at the end of the draining step or the dehydration step to drain the residual liquid in the supply pipe 18 with air. The residual liquid in the pipe 18 can be completely drained.

[0024]

Since the washing machine of the present invention has the above-mentioned structure, even in a water-saving type washing machine in which the washing liquid (washing water) is supplied only to the washing and dewatering tub, the washing and dewatering tub is not used during the washing. It is possible to supply air bubbles to the air, and the air bubbles can lower or lower the cleaning effect.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a washing machine of the present invention.

FIG. 2 is a sectional view showing an example of a conventional washing machine.

FIG. 3 is a sectional view showing another example of the conventional washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing and dehydration tank 2 Pulsator 3 Dehydration hole 4 Laundry receiving tank 5 Drive motor 6 Dehydration shaft 7 Washing shaft 8 Coupling 9 Drainage hole 10 Drainage port 11 Seal receiver 16 Air supply port 17 Supply pipe 18 Air pump 20 Drain valve

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D06F 17/12 D06F 21/00-25/00 D06F 33/00-41/00 D06F 49/00-49/08

Claims (1)

(57) [Claims] A washing tub is provided in a washing machine main body, and a pulsator is rotatably provided at a bottom portion of the washing tub, and a washing and dewatering tub having a dewatering hole formed only near an upper peripheral wall is provided therein. A washing machine provided with a motor for rotating the pulsator for washing and for rotating the washing and spinning tub during dehydration; a cup connecting a bottom of the washing and spinning tub to a spinning shaft provided on the motor; A ring, a drainage hole for draining the washing liquid in the washing and dewatering tub is provided in the coupling, and a seal receiver for connecting the drainage hole and a drainage hole provided at the bottom of the washing tub is provided. A drain hose for draining the washing liquid out of the washing machine body is connected to the drain port, a drain valve is provided between the drain port and the drain hose, and air is supplied from the air pump between the drain valve and the drain port. Supply port Washing machine and said.