JP4613925B2 - Two tank washing machine - Google Patents

Description

  The present invention relates to a two-tank washing machine having a washing tub for clothes and a dewatering tub for centrifugal dehydration.

  Conventionally, this type of washing machine is configured as shown in the longitudinal sectional view of FIG. 4 and the partial sectional view of the vicinity of the motor of FIG. Hereinafter, the configuration will be described.

  As shown in FIGS. 4 and 5, the washing tub 1 and the dewatering tub 2 are formed integrally with resin and are supported inside a steel plate or resin outer frame 4 placed on a resin base frame 3. . On the bottom surface of the washing tub 1, a stirring blade 5 is attached to the upper end, and on the lower end, a motor pulley 7 attached to the washing motor 6 and an impeller pulley 9 that transmits the rotation of the washing motor 6 to the stirring blade 5 via a V belt 8 are provided. The bearing part 10 which mounted the attached washing shaft (not shown) is attached.

  In addition, a dehydration basket 12 having a plurality of through holes 11 on the outer peripheral portion is built inside the dehydration tank 2 and attached to the dehydration motor 15 via a coupling 14 attached to the bottom and fitted with a dehydration shaft 13. The brake wheel (connecting member) 16 is fastened to transmit the rotation of the dehydrating motor 15 to the dewatering basket 12.

  The washing motor 6 is fixed to the frame 3 via a plurality of washing vibration isolating members 17, and the dehydrating motor 15 has a lower end fixed to the frame 3 and has a spring (not shown) inside. It is attached to the upper ends of the plurality of dewatering vibration isolating members 18 and is configured to absorb vibration during dehydration.

  As shown in FIG. 5, the washing motor 6 is formed with an air hole 20 for cooling circulation during operation in the bottom bracket 6 a at the bottom to cool the temperature increase of the internal motor winding (not shown). .

  The dehydrating motor 15 has the same configuration.

  On the upper part of the washing tub 1 and the dewatering tub 2, a control panel 19 is mounted, which is equipped with electrical components (not shown) such as a timer for controlling the rotation.

  The operation in the above configuration will be described. During washing, the laundry is put in the washing tub 1 and water is supplied to a specified water level, and the timer is operated, whereby the washing motor 6 is rotated, and the rotational force is applied to the motor pulleys 7 and V. This is transmitted to the stirring blade 5 via the belt 8, and the laundry is rotated for washing.

  At the time of dehydration, the laundry that has been washed is put into the dehydration basket 12, the timer is operated, the dehydration motor 15 is rotated, the dehydration basket 12 is rotated, and the centrifugal force generated at the time of rotation causes Perform dehydration by shaking off the water.

  In recent years, the market demand for the safety of household appliances has increased, and there is a strong demand for the development of highly safe appliances that will not harm users even if they break down.

The above request is the same for washing machines, and there is a demand for the development of a highly safe washing machine. For example, even when a phase advance capacitor of a drive motor ignites, the ignition does not burn to other members. An example in which the capacitor is surrounded by a fireproof material to prevent the spread of fire has been proposed in a single-tub washing machine (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 5-51272

  However, in the above-described conventional configuration, even if a small member such as a capacitor can be enclosed with a fireproof material, it is a large member such as a motor that transmits the rotation mechanism to another structure. The enclosure structure was difficult. As a result, when a problem occurs in the motor or the like of the opened mounting structure, the following problem occurs.

  When the stirring blade 5 is locked (restrained) for some reason (for example, biting of the laundry into the stirring blade, foreign matter intrusion into the stirring blade, etc.) during washing, the rotation of the washing motor 6 is also locked (restrained), Since current flows through the winding (not shown) of the washing motor 6, heat is generated and the temperature of the washing motor 6 itself rises.

  Normally, a safety device that cuts off the power to the washing motor 6 by operating a temperature protector (not shown) as an overheat prevention device attached to the washing motor 6 is applied when the above state is reached. It is usually done. However, if the temperature protector attached as a result of the above safety measures also malfunctions and the temperature rise is not detected, the temperature of the washing motor 6 will continue to rise, and the varnish and insulation of the winding inside the washing motor 6 will increase. Paper, bearing oil, etc. progress to smoke and fire.

  The fired flame rises upward, but the upper part of the washing motor 6 has an umbrella-shaped metal motor pulley 7, so that it is prevented from spreading to the upper part.

  On the other hand, the burnt residue of the washing motor 6 burned by the ignition falls below the cooling circulation air hole 20 provided at the bottom of the washing motor 6 and burns down to the frame 3 made of resin, There was a possibility of burning in the installation area.

  In addition, when the dewatering motor 15 is locked (restrained) due to some cause (for example, malfunction of the brake mechanism, dropping of the laundry into the dewatering tub, etc.) during the dewatering, the temperature protector is the same as the washing motor 6. In the case where the machine does not operate, smoke and fire are generated, and there is a possibility that it will eventually lead to similar baking to the resin base frame 3 and similar baking of the installation part of the washing machine.

  As described above, in the conventional configuration, there is a problem that an unsafe state occurs in which a combustion product from the motor drips downward and the product burns when an overlapping problem occurs in the motor-related member.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a safer washing machine that has a simple structure, a small number of parts, a low price, excellent durability, and a simple structure.

  In order to achieve the above object, the washing machine of the present invention includes a motor bottom cover formed of a nonflammable material at the bottom of the dehydrating motor and the washing motor, and having a recess having a plurality of through holes in the side surface. It is set as the structure to provide.

  As a result, even if the washing motor or dehydrating motor ignites and the fuel residue drops, the residue is captured by the cover made of non-combustible material that covers the bottom of the motor, and the combustible frame In addition, it is possible to surely prevent soaking on the installation part of the washing machine.

  As a result, it is possible to provide a safer washing machine that has a simple structure, a small number of parts, a low price, and excellent durability, without greatly changing the structure of the conventional washing machine.

  The washing machine of the present invention can surely prevent the igniting at the time of ignition when the motor is abnormal with a simple and reliable configuration.

  The first invention includes a dehydration motor that drives a dehydration basket disposed in a dehydration tank, a washing motor that drives a pulsator for stirring clothes, and a frame that supports the dehydration motor and the washing motor, The motor bottom cover, which is formed of a non-combustible material and has a plurality of through holes in the side surface so as to correspond to the air holes of the bottom bracket below the dehydration motor and the washing motor, It is possible to supplement the burning residue at the time of ignition, and to prevent the burning of the combustible underframe and the washing machine installation part at the lower part.

  Furthermore, by providing a plurality of ventilation holes in the side surface of the motor bottom cover, it is possible to secure the air flow during motor rotation and prevent the temperature of the motor from rising.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  Also, the same part number is assigned to a part having the same configuration as the conventional example. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a washing machine according to a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the vicinity of a motor of the washing machine, and FIG. 3 is an exploded perspective view of a main part of the washing machine. .

  As shown in FIG. 1, a bottom cover 21 made of a non-combustible material is provided below the bottom bracket 6 a at the bottom of the washing motor 6, and the dehydration motor 15 has the same configuration as that attached to the washing motor 6. The dewatering bottom cover 25 is disposed below the dewatering motor 15.

  2 and 3, the bottom cover 21 is disposed so as to face the cooling circulation air hole 20 provided in the bottom bracket 6a of the washing motor 6, and is integrated with the outer periphery of the bottom cover 21. The plurality of claws 22 are attached to the lower surface of the bottom bracket 6 a of the washing motor 6 by being engaged with the air hole 20.

  In addition, a recess 23 is formed in a substantially central portion of the bottom cover 21, and a plurality of through holes 24 are provided on the side surface.

  The operation and action of the washing machine configured as described above will be described below.

  At the time of washing, the laundry is put in the washing tub 1 and water is supplied to a specified water level, and the timer is operated, whereby the washing motor 6 rotates, and the rotational force is supplied to the stirring blade 5 via the motor pulley 7 and the V belt 8. The laundry is rotated and washed.

  If the stirring blade 5 is locked (restrained) for some reason (for example, the biting of the laundry into the stirring blade 5 or the entry of foreign matter into the stirring blade 5) during the washing, the rotation of the washing motor 6 is also locked (restraint). ) And the temperature of the motor itself increases. Furthermore, if the temperature protector (not shown) that is installed as a safety measure is defective, and the temperature rise is not detected, the temperature of the washing motor 6 increases steadily, and the varnish of the winding inside the motor, insulating paper, Bearing oil, etc. will develop into smoke and even ignition.

  The fired flame rises upward, but the upper part of the washing motor 6 has an umbrella-shaped metal motor pulley 7 so that it is prevented from spreading to the upper part.

  On the other hand, burned debris such as varnish, insulating paper, bearing oil, etc. of the winding of the washing motor 6 burned by ignition falls below the cooling circulation air hole 20 provided at the bottom of the washing motor 6 and is caused by non-combustible material. It falls onto the formed bottom cover 21.

  Since the bottom cover 21 is a nonflammable material, the bottom cover 21 does not burn even if it is dropped in a state in which the burning residue is burning, and it is burned into the resin base frame 3 or installed in the washing machine. In other words, it is not burned out and converges only by the burnout of the washing motor 6, thereby preventing the expansion damage.

  At the time of dehydration, the laundry that has been washed is put into the dehydration basket 12, the timer is operated, the dehydration motor 15 is rotated, the dehydration basket 12 is rotated, and the centrifugal force generated at the time of rotation causes Perform dehydration by shaking off the water.

  Even during dehydration, if the dehydration motor 15 is locked (restrained) due to some cause (for example, a malfunction of the brake mechanism, dropping of the laundry into the dehydration tub, etc.), the temperature protector operates in the same manner as the washing motor 6. If not, the process proceeds from smoking to ignition, but as with the washing motor 6 described above, the dehydrating bottom cover 25 converges only by burning out the dehydrating motor 15, resulting in expansion damage. Absent.

  Further, a recess 23 is formed in the central portion of the bottom cover 21, and a plurality of through holes 24 are provided on the side surface thereof, so that the bottom cover 21 closes the air holes 20 of the bottom bracket of the motor. Even if it is, air circulation can be ensured through the through hole 24, so that the original air circulation property of the air hole 20 is not hindered.

  As described above, in the present embodiment, the bottom cover is formed of a noncombustible material at the bottom of the washing motor 6 and the dehydrating motor 15 and has a recess 23 having a plurality of through holes 24 in the side surface at the center. 21 and the dewatering bottom cover 25 are provided, and even if the washing motor 6 and the dewatering motor 15 are ignited and the burning residue is dripped, the bottom cover is formed of a nonflammable material that covers the lower part of the motor. 21 and the dewatering bottom cover 25 capture the burned residue, and can reliably prevent the burning of the combustible underframe and the installation part of the washing machine.

  Further, the attachment method of the bottom cover 21 and the dewatering bottom cover 25 is simple because the claw portions 22 formed integrally with the bottom cover 21 and the dewatering bottom cover 25 are engaged with the air holes 20 formed in the bottom brackets of the respective motors. In addition, a configuration with few parts, low price, excellent durability was realized.

  Further, due to the effect of the through holes 24 provided in the bottom cover 21, the cooling performance by the air circulation of the original motor is not impaired.

  As described above, the washing machine according to the present invention can ensure the safety of the washing machine with a simple and reliable configuration in which the nonflammable material bottom cover is attached. Note that the present invention can be applied not only to a washing machine but also to a device having a motor.

1 is a longitudinal sectional view of a washing machine according to Embodiment 1 of the present invention. Longitudinal cross section near the motor of the washing machine Main part exploded perspective view of the washing machine Vertical section of a conventional washing machine Partial sectional view near the motor of a conventional washing machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing tank 2 Dehydration tank 3 Underframe 5 Stirring blade 6 Washing motor 12 Dehydration basket 15 Dehydration motor 21 Bottom cover 24 Through-hole

Claims (1)

A dehydration motor for driving a dehydration basket disposed in the dehydration tank, a washing motor for driving a pulsator for stirring clothes, and a base frame for supporting the dehydration motor and the washing motor. A two-tub washing machine with a motor bottom cover that is formed of a non-combustible material and has a recess having a plurality of through holes in the side surface so as to correspond to the air holes of the lower bottom bracket.

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