JPH0638875B2 - Automatic washing machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic washing machine designed to reduce noise during dehydration use.

2. Description of the Related Art Conventionally, as shown in FIG. 4, a washing machine of this type is provided with a stirring blade 2 at the center bottom of a washing tub 1 which also serves as a dehydrating tub
An outer tub 3 for receiving water during dehydration is provided outside the washing tub 1. On the outer tub 3, the stirring blade 2 and the motor 8 for driving the washing tub are attached. The outer tub 3 is supported in a main body 4 via a support rod 5 so as to be vibration-proof.

The operation is to supply water to the washing tub 1, drive the stirring blade 2 to wash the clothes, drain the water, and then rotate the washing tub 1 at high speed to centrifugally dehydrate the clothes. It is something to do.

Problems to be Solved by the Invention However, in such a structure, since the clothes 9 are unevenly distributed after washing, a large rotational imbalance occurs during centrifugal dehydration, which causes noise. Was becoming. As a noise transmission path, the vibration of the washing tub 1 and the outer tub 3 caused by the rotational imbalance is transmitted to the main body 4 via the support rod 5 which is a vibration-proof support, and generates noise, and for the motor cooling. A transmission path that is directly emitted to the outside from the gap 7 between the open bottom surface of the main body and the floor 6 can be considered. However, in general, the latter transmission path is mainly used, and in order to prevent this, how to efficiently prevent noise emission from the gap 7 without adversely affecting the cooling of the motor is an issue. There is.

The present invention solves such a problem, and an object of the present invention is to provide an automatic washing machine that is sound-insulating and low-noise without adversely affecting the cooling of the motor.

Means for Solving the Problems Technical means of the present invention for solving the above problems include a washing tub which also serves as a dehydrating tub, an outer tub located outside the washing tub and receiving dewatering water, and a washing device. It has a stirring blade provided at the center bottom of the tank, a motor for driving the stirring blade and the dehydration tank, and a main body enclosing them in a substantially sealed state. The ventilation hole having the opening / closing means is provided.

Action The action of this technical means is as follows. That is, in this type of automatic washing machine that automatically performs the washing and dehydrating steps, the washing step generally takes a longer time and the input is large, so the temperature rise during this step is the most problematic. However, since the noise is small, the noise can be greatly reduced during the dehydration process by opening the intake hole during the washing process and keeping the main body in the dehydration process, and the temperature rise of the motor can be practically used. It can be suppressed to a possible value.

Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 10 is a dehydration tub that also serves as a washing tub,
A stirring blade 11 is provided at the center bottom. Reference numeral 12 denotes an outer tub, which is provided outside the washing tub 10 and serves to receive water during dehydration. A driving motor 13 is attached to the lower surface of the outer tub 12, and
The stirring blade 11 and the washing tub 10 are driven via the speed reducer 15 connected by 4. Reference numeral 16 denotes a main body which encloses the washing tub 10, the outer tub 12, the motor 13 and the like in a substantially sealed state, and the outer tub 12 is supported by the main body 16 via a support rod 17 in a vibration-proof manner.

The bottom surface 18 of the main body 16 is provided with a plurality of rectangular ventilation holes 19 as shown in detail in FIGS. 2 and 3. A cover 21 having a plurality of rectangular openings 20 corresponding to the ventilation holes 19 is attached to the upper side of the bottom surface 18. One end of the cover 21 is connected to a movable piece 23 of a solenoid 22 attached to the body 16. The other end of the cover 21 is connected to the main body 1 via a spring 24.
It is attached to 6.

Next, the operation of the configuration of this embodiment will be described. When laundry such as clothes is put in the washing tub 10 and the washing machine is driven, water is automatically supplied to the washing tub 10. When the water level reaches a certain level, the water supply is stopped and the stirring blades 11 rotate to start washing.
After washing for a certain period of time, the water is automatically drained, and then the washing tub 10 rotates to spin-dry the laundry.

In the washing process of the series of processes described above, the cover 21 is pulled by the solenoid 22 as shown in FIG.
The ventilation hole 19 of the bottom surface 18 of the main body and the opening portion 20 of the cover overlap, that is, the ventilation hole 19 of the bottom surface 18 is opened. Then, the outside air flows into the inside of the main body to help cool the motor 13. During the dehydration process, the solenoid 22 is de-energized, the cover 21 is pulled by the spring 24 as shown in FIG. 2 (b), the ventilation holes 19 of the bottom surface 18 are closed, and the dehydration noise is shut off. Noise is greatly reduced. According to the experiment, the ventilation hole 1
The example of sealing 9 had a 5.5 to 6.5 dBA reduction.

EFFECTS OF THE INVENTION As described above, according to the present invention, by substantially closing the ventilation hole of the main body during the dehydration process, the noise caused by the vibration due to the unevenness of the cloth during the dehydration process can be significantly reduced. In addition, since the ventilation holes are opened during the washing process, the temperature rise of the motor remains at a value that is sufficiently suitable for practical use, which has a great practical effect.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an automatic washing machine according to an embodiment of the present invention, and FIGS. 2 (a) and 2 (b) show a state in which a ventilation hole at the bottom of the automatic washing machine is open and closed. A sectional view showing a state, FIG. 3 is a bottom view of the same automatic washing machine, and FIG. 4 is a longitudinal sectional view showing a conventional automatic washing machine. 10 ... washing tub, 11 ... stirring blade, 12 ... outer tub, 13
...... Motor, 16 …… Main body, 19 …… Ventilation hole.

Claims (1)

[Claims] 1. A washing tub also serving as a dehydrating tub, an outer tub located outside the washing tub for receiving dehydration water, a stirring blade provided at a central bottom portion of the washing tub, a stirring blade and a dehydrating tub. It has a driving motor and a main body that encloses these in a substantially sealed state,
An automatic washing machine provided with a ventilation hole in the main body, which has an opening / closing means that opens during washing and closes during dehydration.