JPH10263271A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the heating of driving motor by surely supplying cooling air to two driving motors respectively even when a swing body based on an outer tub swings concerning a drum type washing machine for washing, rinsing and dehydrating laundry inside a drum arranged so as to be freely rotated with an almost horizontal rotary shaft as a center. SOLUTION: A rotary drum 1 having the almost horizontal rotary shaft is externally wrapped by an outer tub 3, the swing body based on the outer tub 3 is housed in a body 24 so as to swing, and the rotary drum 1 is rotated by a 1st motor 6 and a 2nd motor 7 at the time of washing and dehydrating. A cooling fan 23 for cooling the 1st motor 6 and the 2nd motor 7 is fixed on the outer tub 3, a cooling duct 26 is fixed on the cooling fan 23, and the cooling air blowing port of cooling duct 26 is branched so as to face the 1st motor 6 and the 2nd motor 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine for washing, rinsing, and dewatering laundry in a drum rotatably disposed about a substantially horizontal rotation axis.

[0002]

2. Description of the Related Art Conventionally, a drum type washing machine of this kind is shown in FIG.
It was configured as shown in FIG. Hereinafter, the configuration will be described.

[0003] As shown in the figure, a rotary drum 1 is provided with a large number of water passage holes 2 on the entire outer peripheral portion and is rotatably disposed in an outer tank 3. One end of a rotating shaft 4 is fixed to the rotation center of the rotating drum 1 in a substantially horizontal direction, and a driven pulley 5 is fixed to the other end of the rotating shaft 4. The first motor 6 is a rotating drum 1
Is rotated at a first rotation speed N1 (for example, 53 rpm) to perform washing or rinsing, and the second motor 7 drives the rotating drum 1 to a second rotation speed N2 (for example,
Spin at 1000 rpm) to dehydrate.

[0004] The first motor 6 and the second motor 7 are driven pulleys 6a, 7a fixed to the end of a motor shaft.
Are connected to the driven pulley 5 via belts 8 and 9, respectively. The driven pulley 5 has two reduction ratios. The first motor 6 is connected via a belt 8 to a driven pulley 5 a having a large reduction ratio, and the second motor 7 is connected to a belt 9.
Through the driven pulley 5b having a small reduction ratio.

[0005] A cooling fan (not shown) is provided on the drive pulleys 6a and 7a, and a cooling fan (not shown) is attached to the other end of the motor shaft, so that the first motor 6 and the second motor 7 are connected. When rotated, the cooling fan generates cooling air.

The outer tub 3 is composed of an outer tub main body 3a and an outer tub front plate 3b covering the opening of the outer tub main body 3a. The outer tub 3 is swingably suspended from a body 10 by a spring 11 and a vibration damper 12 is provided. As a result, vibration at the time of starting dehydration is reduced, vibration-proof support is provided so that vibration for steady dehydration is not transmitted to the body 10, and a weight 13 for reducing vibration during dehydration is provided.
A heater 14 is provided at the bottom side of the outer tub 3 to heat the washing water in the outer tub 3, and further, one end of a hose 15 for drainage is connected, and the other end of the hose 15 is connected to a drainage pump 16. The washing water in the tub 3 is drained.

The substantially cylindrical packing member 17 connects between the opening of the outer tub 3 corresponding to the front opening of the rotary drum 1 and the front opening of the body. It is fixed to the front plate 3b. A lid 18 is provided at the body front opening so as to be freely opened and closed. The water supply valve 19 supplies water to the outer tub 3.

The control devices 20 and 20a control the operations of the first motor 6, the second motor 7, the heater 14, the drain pump 16 and the water supply valve 19, and perform a series of steps such as washing, rinsing and dehydrating. The control device 20 is mounted on the upper part of the body 10 and the control device 20a is mounted on the body 1
0 at the bottom.

The operation of the above configuration will be described.
8 is opened, laundry is put into the rotating drum 1, a power switch (not shown) is turned on, and a start switch (not shown) provided in the control device 20 is operated to start the operation. When the water level is detected by a water level detecting means (not shown), the water supply is stopped and the first motor 6 is driven. In the washing process, the rotating drum 1 is driven to rotate at a first rotation speed N1 by the first motor 6 while replenishing water because the laundry contains water, and the laundry in the rotating drum 1 is lifted up to a water surface. Dropped on.

At this time, the heater 14 is energized to heat the washing water in the outer tub 3 while controlling it to a substantially constant temperature. When the washing process is completed, the drain pump 16 operates to drain the washing water in the outer tub 3. The same operation as the washing process is performed in the rinsing process.

In the dehydration step, the rotary drum 1 is driven to rotate at a second rotation speed N2 by a second motor 7, and the laundry is centrifugally dehydrated. At this time, if the laundry in the rotating drum 1 is shifted and unbalance occurs, the swinging members such as the rotating drum 1 and the outer tub 3 vibrate. It is attenuated and is not transmitted to the body 10 by the vibration isolating mechanism of the vibration isolating damper 12 during steady dehydration.

When the first motor 6 and the second motor 7 are rotating at the first rotation speed N1 and the second rotation speed N2, respectively, the cooling fans attached to both ends of each motor shaft are used. Cooled.

[0013]

In such a conventional configuration, the first motor 6 rotates forward and reverse during the washing process so that the rotating drum 1 rotates forward and backward at the first rotation speed N1.
In such a driving method, the load on the first motor 6 increases, and the amount of heat generated by the motor itself increases. At this time, the number of rotations of the first motor 6 is low, the amount of air generated by the cooling fans fixed at both ends of the motor shaft is small, so that the cooling performance is poor. In order to cool the first motor 6,
Although it is necessary to cool the central portion of the motor, the cooling fans fixed to both ends of the motor shaft make it difficult for the cooling air to flow to the central portion of the motor, resulting in poor cooling performance.

In the dewatering process, the rotary drum 1
The motor 7 rotates in one direction at a rotation speed N2, so that the cooling air generated by the cooling fans at both ends of the motor shaft is larger than that of the first motor 6, but like the first motor 6, the center of the motor is The cooling air does not easily reach the part and the cooling performance is poor, and the noise generated by the cooling fan when the motor rotates is increased.

The control device 20a also generates heat and needs to be cooled. However, with the cooling fans attached to the first motor 6 and the second motor 7, the cooling air does not hit the control device 20a and the cooling performance is poor. Was something.

The present invention solves the above-mentioned problems, and ensures that cooling air is applied to each of the two drive motors even if the rocking body mainly composed of the outer tub swings, thereby reducing the heat generated by the drive motors. The purpose is to hold down.

[0017]

According to the present invention, in order to achieve the above object, a rotating drum having a rotating shaft in a substantially horizontal direction is encased in an outer tank, and a rocking body mainly composed of the outer tank is swung to a body. The rotating drum is rotated by two drive motors during washing and dehydration. A cooling fan for cooling two drive motors is fixed to the outer tub, a cooling duct is fixed to the cooling fan, and a cooling air outlet of the cooling duct is branched so as to face the two drive motors. .

Thus, even when the rocking body mainly composed of the outer tub swings, the cooling air can be reliably applied to the two drive motors, and the heat generated by the drive motors can be suppressed.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a rotating drum having a rotating shaft in a substantially horizontal direction, an outer tub enclosing the rotating drum, and the rotating drum during washing and spin-drying. Two drive motors for rotating the
A body accommodating a rocking body having the outer tub as a main body, and a cooling fan for cooling the two drive motors;
A cooling duct fixed to the cooling fan, wherein the cooling fan is fixed to the outer tub, and a cooling air outlet of the cooling duct is branched so as to face two drive motors. Even when the outer tub, which is swingably suspended by a spring body, swings during washing and spin-drying, the cooling air can be reliably applied to the two drive motors to suppress heat generation of the drive motors. be able to.

According to a second aspect of the present invention, in the first aspect of the present invention, the cooling fan is screwed and fixed to the outer tank from the front side of the body. Since it can be easily carried out, the assemblability and serviceability can be improved.

According to a third aspect of the present invention, in the first or second aspect of the invention, the cooling duct has a cooling air outlet opening toward the center of the drive motor, and Even when rocking during washing and spin-drying, the cooling air can be reliably applied to the center portions of the two drive motors, respectively, so that the cooling performance can be improved and the heat generated by the drive motors can be suppressed.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the cooling duct has a partition wall at the center, and the cooling air from the cooling fan is divided into two. The amount of cooling air from the cooling fan can be freely set.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the cooling duct has a gap at a part of a connection portion with the cooling fan so that cooling air leaks from the connection portion. The control device and the like can be cooled by the cooling air leaked from the connection portion, and the cooling air can be divided into three with a simple configuration.

According to a sixth aspect of the present invention, in the first aspect of the invention, the cooling duct has a hole in a wall surface,
Since the holes are covered with felt, the sound of cooling air when cooling the drive motor can be suppressed, and the drive motor can be cooled quietly.

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, the cooling duct has a hole formed by a vertically low pipe on a wall surface, and the cooling duct has a simple hole. In addition, even if a hole is formed in the cooling duct, the strength of the duct does not decrease.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1) As shown in FIG. 1, a first motor (drive motor) 6 rotates the rotary drum 1 at a first rotation speed N1 (for example, 53 rpm) to perform washing or rinsing. The second motor (drive motor) 7 rotates the rotary drum 1 at a second rotation speed N2 (for example, 1000 rpm) to perform dehydration.

The motor mounting plate 21 is fixed to a lower portion of the outer tub 3, and the first motor 6 and the second motor 7 are fixed to the motor mounting plate 21 by screws. A cooling fan mounting plate 22 is fixed to a lower portion of the outer tub 3, and a cooling fan 23 is screwed to the cooling fan mounting plate 22 from the front surface of the body 24 with screws 25.

As shown in FIGS. 2 and 3, a cooling duct 26 is fixed to the outlet 23a of the cooling fan 23. The cooling duct 26 branches into two branches, and one of the cooling air outlets 26a is connected to the first outlet 26a. And the other cooling air outlet 26b is opposed to the motor shaft of the second motor 7, that is, the center.

As shown in FIG. 4, the body 24 is composed of a front panel 24a and a body panel 24b formed integrally with both side surfaces, a back surface, and a top surface.
Is screwed to the body panel 24b and has a removable configuration. The control devices 27 and 27a control operations of the heater 14, the first motor 6, the second motor 7, the cooling fan 23, and the like, and sequentially control a series of processes such as washing, rinsing, and dehydrating. Other configurations are the same as the conventional example.

The operation of the above configuration will be described.
8 is opened, laundry is put into the rotating drum 1, a power switch (not shown) is turned on, and a start switch (not shown) provided on the control device 27 is operated to start the operation. The valve 19 operates to supply water, and when a predetermined water level is detected by a water level detection means (not shown), the water supply is stopped and the first motor 6 is driven. In the washing process, the rotating drum 1 is driven to rotate at a first rotation speed N1 by the first motor 6 while replenishing water because the laundry contains water, and the laundry in the rotating drum 1 is lifted up to a water surface. Dropped on.

At this time, the cooling fan 23 operates, and the cooling air flows through the cooling duct 26 and the cooling air outlet 26
a and 26b are simultaneously fed into the center of the first motor 6 and the second motor 7. In the washing process, the rotating drum 1
Because the laundry inside moves inside the rotating drum 1, the body 2
4 causes the outer tub 3 suspended by the spring body 11 to swing. Also, the outer tub 3 swings due to the spinning rotation in the spinning process. However, the cooling fan 23 is connected to the first motor 6, the second
Similarly to the motor 7, the cooling air can be reliably applied to the central portions of the two motors simultaneously because the cooling air is attached to the outer tank 3.

The body 24 has a structure in which a front panel 24a is detachable.
3 is screwed from the front surface of the body 24 to the cooling fan mounting plate 22 with screws 25. Therefore, when replacing the cooling fan 23, the cooling fan 23 can be replaced without moving the washing machine main body, thereby improving the assemblability and serviceability. can do.

(Embodiment 2) As shown in FIGS. 5 to 7,
The cooling duct 28 is a duct 2 for cooling the first motor 6.
8a and a duct 28b for cooling the second motor 7; the two ducts are divided by a partition wall 28c;
The cooling air from a cooling fan (not shown) is divided into two. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. The cooling fan operates during washing and spin-drying, and the cooling air passes through the cooling duct 28 so that the first motor 6 and the second motor 7
At the same time. At this time, the duct 28
Since a and the duct 28b are divided by the central partition wall 28c, the cooling air from the cooling fan can be surely divided. For example, if you want to split the cooling air by 1: 3,
This is possible by configuring the central partition wall 28c such that the area of the outlet of the cooling fan is 1: 3, and the amount of cooling air from the cooling fan can be set freely.

(Embodiment 3) As shown in FIG. 8, the cooling duct 29 is branched on the way, and the cooling air outlet 29a,
Two portions 29b are provided, and the connection portion with the discharge port of the cooling fan 23 is formed so that a gap 29c is formed in a part thereof. The gap 29c is provided in a direction in which the cooling air coming out of the gap 29a hits the control circuit 27a. ing. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. The cooling fan 23 operates at the time of washing and spin-drying, and the cooling air passes through the cooling duct 29, and the cooling air outlets 29a,
From 9b, it is fed into the center of the first motor 6 and the second motor 7 at the same time. At this time, the cooling air from the outlet of the cooling fan 23 is also blown out of the gap 29c of the cooling duct 29 and blown to the control circuit 27a.

By providing the gap 29c in this manner, the cooling air can be easily divided into three parts, and the first motor 6, the second motor 7, and the control circuit 27a attached to the lower portion of the main body of the washing machine are simultaneously operated. Can be cooled.

(Embodiment 4) As shown in FIG. 9, the cooling duct 30 is branched on the way, and the cooling air outlet 30a,
Two 30b are provided. Also, a plurality of holes 30c are formed in the wall surface of the cooling duct 30, and the holes 30c are
Covered with 1. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. The cooling fan 23 operates at the time of washing and spin-drying, and the cooling air passes through the cooling duct 30 and the cooling air outlets 30a, 3a.
0b is fed simultaneously to the center of the first motor 6 and the second motor 7. At this time, since the cooling air becomes turbulent and flows through the cooling duct 30, the sound due to the cooling air reverberates in the cooling duct 30 and generates a large noise, but the felt 31 affixed to the wall surface of the cooling duct 30. The noise is absorbed, the reverberation is reduced, and it can be cooled quietly.

(Embodiment 5) As shown in FIG. 10, the cooling duct 32 is branched on the way and
a and 32b are provided at two locations. The cooling duct 32
Are provided with a plurality of holes 32c in the wall surface, and the hole 32c forms a flange portion 32d in a direction perpendicular to the wall surface. The hole 32 c is covered with a felt 33. Other configurations are the same as those of the fourth embodiment.

The operation of the above configuration will be described. During the washing and dehydration, the cooling fan 23 operates, and the cooling air flows through the cooling duct 32 and the cooling air outlets 32a, 3a.
2b is simultaneously fed into the center of the first motor 6 and the second motor 7. At this time, since the cooling air becomes turbulent and flows through the cooling duct 32, the sound due to the cooling air reverberates in the cooling duct 32 and generates a large noise. The noise is absorbed, the reverberation is reduced, and it can be cooled quietly.

By providing the holes 32c, the mechanical strength of the cooling duct 32 is reduced.
By providing the flange portion 32d in the hole 32c on the wall surface of the above, it is possible to prevent the mechanical strength of the cooling duct 32 from decreasing.

[0044]

As described above, according to the first aspect of the present invention, a rotating drum having a rotating shaft in a substantially horizontal direction, an outer tub that encloses the rotating drum, Two drive motors for rotating the rotary drum, a body for oscillatingly accommodating an oscillating body mainly composed of the outer tub, a cooling fan for cooling the two drive motors, and the cooling fan A fixed cooling duct is provided, and the cooling fan is fixed to the outer tub, and a cooling air outlet of the cooling duct is branched so as to face two drive motors. Even if the outer tub suspended in
Cooling air can be reliably applied to each of the drive motors, and heat generation of the drive motors can be suppressed.

According to the second aspect of the present invention, since the cooling fan is fixed to the outer tub by screwing from the front side of the body, the cooling fan can be easily mounted and replaced from the front side of the body. , Assemblability and serviceability can be improved.

According to the third aspect of the present invention, since the cooling air duct has the cooling air outlet opened toward the center of the drive motor, even if the outer tub swings during washing and dehydration. , Cooling air can be reliably applied to the center portions of the two drive motors, and the cooling performance can be improved,
Heat generation of the drive motor can be suppressed.

According to the fourth aspect of the present invention, the cooling duct has a partition wall at the center and divides the cooling air from the cooling fan into two parts. Can be set freely.

According to the fifth aspect of the present invention, the cooling duct has a gap at a part of the connection portion with the cooling fan so that the cooling air leaks from the connection portion. The control device and the like can be cooled by the leaked cooling air, and the cooling air can be divided into three with a simple configuration.

According to the sixth aspect of the present invention, since the cooling duct has a hole in the wall surface and covers the hole with felt, it is possible to suppress the sound of cooling air when cooling the drive motor, The drive motor can be cooled quietly.

According to the seventh aspect of the present invention, since the cooling duct has a hole formed by a vertically low pipe on the wall surface, the hole can be easily formed in the cooling duct.
Further, even if a hole is formed in the cooling duct, the strength of the duct does not decrease.

[Brief description of the drawings]

FIG. 1 is a sectional view of a drum type washing machine according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a cooling duct of the drum type washing machine.

FIG. 3 is an enlarged side view of a cooling duct of the drum type washing machine.

FIG. 4 is an exploded perspective view of the drum type washing machine with a part cut away.

FIG. 5 is a sectional view of a cooling duct of a drum type washing machine according to a second embodiment of the present invention.

FIG. 6 is a side view of a cooling duct of the drum type washing machine.

FIG. 7 is a sectional view of a main part of a cooling duct of the drum type washing machine.

FIG. 8 is a partially cutaway top view of a cooling duct of a drum type washing machine according to a third embodiment of the present invention.

FIG. 9 is a sectional view of a cooling duct of a drum type washing machine according to a fourth embodiment of the present invention.

FIG. 10 is a partially cutaway top view of a cooling duct of a drum type washing machine according to a fifth embodiment of the present invention.

FIG. 11 is a sectional view of a conventional drum type washing machine.

[Explanation of symbols]

 Reference Signs List 1 rotating drum 3 outer tub 6 first motor (drive motor) 7 second motor (drive motor) 23 cooling fan 24 body 26 cooling duct 26a cooling air outlet 26b cooling air outlet

Claims (7)

[Claims] 1. A rotating drum having a rotating shaft in a substantially horizontal direction, an outer tub enclosing the rotating drum, two drive motors for rotating the rotating drum during washing and spin-drying, respectively; A cooling fan for cooling the two drive motors; and a cooling duct fixed to the cooling fan, wherein the cooling fan is fixed to the outer tub. A drum type washing machine in which a cooling air outlet of the cooling duct is branched so as to face two drive motors. 2. The drum type washing machine according to claim 1, wherein the cooling fan is screwed and fixed to the outer tub from the front side of the body. 3. The drum type washing machine according to claim 1, wherein the cooling duct has a cooling air outlet opening toward a center of the drive motor. 4. The cooling duct has a partition wall at the center, and divides cooling air from the cooling fan into two parts.
A drum-type washing machine as described. 5. The drum-type washing machine according to claim 1, wherein the cooling duct has a gap at a part of a connection part with the cooling fan, so that cooling air leaks from the connection part. 6. The drum type washing machine according to claim 1, wherein the cooling duct has a hole in a wall surface, and the hole is covered with felt. 7. The drum type washing machine according to claim 6, wherein the cooling duct has a hole formed by a vertically low pipe in a wall surface.