JPH0327240B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a drum-type washing machine in which a drum containing clothes is rotated by a motor to beat and wash the clothes.

(B) Prior art This type of drum-type washing machine has a drum rotated by a motor disposed in a water tank, washing water with an appropriate detergent concentration is poured into the lower part of the water tank, and then the drum is rotated. let The clothes in the drum absorb the washing water, are lifted up, and fall, and as a result of this falling, they are washed. However, if the detergent concentration in the washing water is high, it will foam significantly during the washing process, and the foam that rises as the drum rotates will spill out of the water tank and out of the machine, wetting the floor. . In addition, the clothes float in the foam, and the foam also acts as a cushion, reducing the effectiveness of washing by washing.
It took a long time to wash to achieve the desired level of cleanliness. In particular, this type of drum-type washing machine usually requires a longer washing time than the generally popular spiral-type washing machine, so if it takes a longer time due to foaming, it would be difficult to put it into practical use.

(c) Purpose of the Invention The present invention maintains cleanliness and prevents washing time from increasing by detecting bubbles and sequentially forcibly discharging bubbles exceeding a predetermined value. At the same time, it prevents foam from overflowing to the outside of the machine.

(d) Structure of the Invention The present invention includes a foam detection device that detects the state of foam generation in a water receiving tank, and when this device detects foam, operates a blower or pump to discharge the foam in the water receiving tank. It is forcibly expelled from the outlet or sucked out to the exhaust port.

In addition, the air outlet of the blower is placed opposite to the outlet to facilitate blowing out the bubbles.

Furthermore, a lid that opens when the blower operates is provided on the air outlet to protect the blower by preventing bubbles and splashes of washing water from entering the blower.

(E) Embodiment In the drawings, 1 is a body consisting of a water receiving tank 2 and a dewatering tank 3 arranged side by side inside, and a horizontally elongated control box 4 is arranged at the upper rear part. Reference numeral 5 denotes a drum rotatably disposed within the water receiving tank 2, with the center of rotation in the front-rear direction of the machine, and a drum 6 protruding from the inside for scooping up clothes, and water holes throughout the circumferential wall. 7... is drilled. 8 is a clothing entrance opened and closed by a hatch 9. 10 is a top plate attached to the upper opening of the water receiving tank 2.

11 is a discharge port provided at the bottom of the water receiving tank 2 and opened and closed by a discharge valve 12; 13 is a discharge port provided at the bottom of the water receiving tank 2;
14 is the dewatering tank 3.
The outlet provided at the bottom of the
1, 13, and 14 are connected to a drain pipe 15.

16 is a washing motor that rotates the drum 5 clockwise at, for example, 60 rpm, and 17 is a dehydration motor that rotates the dehydration tank 18 in the dehydration receiving tank 3 at high speed.

19 is a bubble detection device, control box 4
A foam storage cylinder 20 that penetrates the bottom and top plate 10 of the water tank 2 and communicates with the middle upper part of the water receiving tank 2, a float 21 that is located inside this cylinder and placed on the top end of the cylinder, and a bubble storage cylinder 21 that is located inside the control box 4. and a switch 22 with an operator located close to the top of the float.
A guide piece 23 protrudes from the lower end of the foam storage cylinder 20 toward the circumferential wall of the drum 5 and comes close to the guide piece, which scrapes off foam adhering to the peripheral wall of the drum 5 that rotates to the right and introduces it into the storage cylinder 20.

24 is an exhaust pipe installed in the front part of the fuselage 1,
The discharge port 25 at the upper end communicates with the middle upper part of the front part of the water receiving tank 2, and the lower end is connected to the discharge pipe 15. 2
6 is a mesh screen.

Reference numeral 27 denotes a blower disposed at the rear of the fuselage 1, which communicates the air outlet 29 extended by the gasket 28 with the middle upper part of the rear of the water receiving tank 2, and faces the outlet 25. . 30 is an opening/closing lid that prevents splashes of washing water etc. from entering the air outlet 29;
Normally, it is closed by the elasticity of a spring (not shown), for example, and is pulled up and opened when the solenoid 31 is actuated. 32 is a mesh screen.

Reference numeral 33 denotes a top lid, which is linked with a safety switch 34 that opens when the lid is opened and closes when it is closed.

The electric circuit is shown in FIG. 3, and power is supplied from the power source to a control device 36 such as a relay 35, a solenoid 31, a blower motor 27, and motors 16 and 17 through a safety switch 34.
The switch 22 mentioned above is connected in series to the relay 35. Further, a contact 35A of a relay 35 is connected in series to the solenoid 31, and a contact 35B is connected in series to the blower motor 27. Furthermore, a series circuit of a display device (buzzer, indicator light, etc.) and a relay contact may be connected to the power source.

To explain the operation, first, water and detergent are put into the water tank 2, and clothes are put into the drum 5. Then, close the top lid 33 and set the time using a timer or the like. Then, the motor 16 rotates the drum 5,
The clothes in the drum 5 are washed by beating. If the detergent concentration in the washing water is appropriate, foaming will be adequate.
Also, the bubbles are small.

If the detergent concentration is high, large bubbles will rise rapidly during washing, some of which will be discharged from the overflow port 13, but the remainder will rise as the drum 5 rotates. During this time, the guide 23 scrapes off the bubbles from the peripheral side wall of the drum 5 and introduces them into the storage cylinder 20.
When a predetermined amount of bubbles enters the cylinder, the float 21 gains upward force and rises, activating the switch 22. As a result, relay 35 closes its contacts 35A and 35B, and solenoid 31 and blower motor 27
Activate. In this way, the opening/closing lid 30 opens the air outlet 29 and allows the blower motor 27 to send air toward the outlet 25 with good directionality.

In the water receiving tank 2, the strong directional wind coming out of the air outlet 29 causes bubbles attached to the drum 5 and
The foam leaking from ... is expelled from the outlet 25.

Therefore, the rising level of foam in the drum 5 is suppressed below the positions of the air outlet 29 and the outlet 25,
Maintains the washing effect and prevents leakage outside the machine.

In this embodiment, the air outlet 29 and the outlet 25 are arranged at the middle upper part of the water receiving tank 2, but they may be arranged at a lower position depending on the relationship between the foam rising level and the washing effect.

Further, instead of the blower motor 27, a vacuum pump 37 may be disposed in the discharge pipe 24 to suck out the bubbles from the discharge port 25. Furthermore, the blower 27 and the pump 3
7 may be used together.

A display device may display that the bubbles are being forcibly discharged in this way. In this forced discharge state, the washing water removes dirt from the clothes and becomes difficult to foam, so that normal washing can proceed thereafter.

(F) Effects of the Invention The present invention can suppress foam to a certain level and prevent the floor surface from getting wet due to leakage outside the machine, and can maintain the washing effect (cleanliness). Since there is a forced discharge device, there is no need to stop the rotation of the drum during the operation, and the washing time can be prevented from increasing.As a result, this type of drum-type washing machine can be put into practical use. It is something that can be done.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a drum-type washing machine according to the present invention, FIG. 2 is a side sectional view, and FIG. 3 is an electric circuit diagram. 1... Airframe, 2... Water tank, 5... Drum, 1
9... Bubble detection device, 22... Switch, 25...
Discharge port, 27... Blower, 29... Ventilation port, 3
0...Opening/closing lid, 37...Vacuum pump.

Claims (1)

[Scope of Claims] 1. A drum rotated by a motor is disposed in a water tank, and in a device in which clothes are washed by beating in the rotating drum, foam is discharged into the water tank. A discharge port is provided, and a forced discharge means consisting of a blower for expelling foam from the discharge port or a pump for sucking foam from the discharge port is provided inside the machine, and this forced discharge means is activated as appropriate by a foam detection device. A drum-type washing machine. 2. The drum-type washing machine according to claim 1, wherein the air outlet of the blower is opposed to the outlet in the water receiving tank. 3. The drum type washing machine according to claim 2, wherein an opening/closing lid is provided on the air outlet of the blower, and the opening/closing lid is operated to open by the bubble detection device.