JPH10211393A - Drum washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make possible to remove foreign matter falling between a rotary drum and an outer tub easily and to improve watertightness and workability by surrounding the rotary drum having a rotary shaft in a nearly horizontal direction and a roughly depressed heating body storage at the bottom of the outer tub. SOLUTION: Washing water in an outer tub 21 is heated by applying power to a heater 22 while keeping it at a constant temperature. The outer tub 21 has a nearly circular cross section around the rotary shaft 4, and as the rotary drum 1 and the outer tub 21 are structured so as to be concentric in shape perpendicular to the rotary shaft 4, the outer tub 4 can be made small. There is no needless space between the rotary drum 1 and the outer tub 21, the quantity of water supplied to the outer tub 21 can be decreased, it can be heated in a very short time. In case foreign matter falls between the rotary drum 1 and the outer tub 21 by accident, the foreign matter falls to the heating body storage at the bottom of the outer tub 21 and can be removed by loosening a screw from the front and removing the heater 22.

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 type has been constructed as shown in FIGS. Hereinafter, the configuration will be described.

[0003] As shown in FIG. 4, a rotary drum 1 has a large number of water passage holes 2 provided on the entire outer peripheral portion thereof 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 for rotating or rotating the rotating drum 1 at a first rotation speed N1 (for example, 53 rpm) for washing or rinsing. The second motor 7 is for rotating the rotating drum 1 for a second rotation. Dehydration is performed by rotating at a rotation speed N2 (for example, 1000 rpm).

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

As shown in FIG. 5, the outer tub 3 comprises an outer tub main body 3a having a substantially egg-shaped cross section and an outer tub front plate 3b covering an opening of the outer tub main body 3a. 11, swingably suspended by 11, vibrations at the time of dehydration start-up are reduced by the vibration-proof damper 12, and vibration-proof support is performed so that vibrations during steady-state dehydration are not transmitted to the body 10, and vibrations at the time of dehydration are reduced. A weight 13 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 device 20 includes a first motor 6, a second motor 7, a heater 14, a drain pump 16, and a water supply valve 1.
9 is controlled to sequentially control a series of steps such as washing, rinsing, and dehydration.

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. 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,
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 at a substantially constant temperature. When the washing process is completed, the drain pump 16 operates to operate the outer tub 3.
Drain the washing water inside. The same operation as the washing process is performed in the rinsing process.

In the dewatering process, the rotary drum 1 is driven to rotate at a second rotation speed N2 by a second motor 7, and the laundry is centrifugally dewatered. At this time, when the laundry in the rotating drum 1 is shifted, that is, imbalance occurs, the swinging members such as the rotating drum 1 and the outer tub 3 vibrate. Is not transmitted to the body 10 by the vibration isolating mechanism of the vibration isolating damper 12 during steady dehydration.

[0010]

In such a conventional construction, since the outer tub 3 has a substantially egg-shaped cross section, the outer tub 3 becomes large, and the rotary drum 1 and the outer tub 3 A large unnecessary space A is formed on both sides of the heater 14 between the heater 3 and the washing water.
Further, when foreign matter enters between the rotary drum 1 and the outer tub 3, the foreign matter enters a wide space between the rotary drum 1 and the outer tub 3, and it is difficult to remove the foreign matter.

Further, since the cross section of the outer tank main body 3a constituting the outer tank 3 and the outer tank front plate 3b are substantially egg-shaped, the outer tank main body 3a
a and the outer tub front plate 3b are difficult to fit, watertightness and workability are poor, and it is difficult to align the center of the rotary drum 1 with the center of the outer tub 3; The outer drum-side end of the substantially cylindrical packing member 17 fixed to the outer drum and the rotating drum 1 may be eccentric, and the rotation of the rotating drum 1 rubs the rotating drum 1 and the packing member 17 so that the packing member 17 is worn. Had the problem of doing so.

As a solution to these problems, as shown in FIG. 6, there is a method in which the outer tank 3 is formed to have a substantially perfect circular cross section. However, in this configuration, since the center of the rotary drum 1 and the center of the outer tank 3 are shifted, the outer tank 3 becomes large,
Since a large unnecessary space B is formed between the rotary drum 1 and the outer tub 3, the amount of water used increases, and when foreign matter enters between the rotary drum 1 and the outer tub 3, it is difficult to remove the foreign matter. Was a problem that could not be solved.

[0013] The present invention solves the above-mentioned conventional problems, and reduces the amount of water used to supply water to the outer tub by reducing the size of the outer tub. And easily fit the outer tank body and the outer tank front plate that constitute the outer tank,
The purpose is to improve water tightness and workability.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a rotary drum having a rotating shaft in a substantially horizontal direction by an outer tub, and a substantially concave heating element housing chamber at the bottom of the outer tub. Is provided.

[0015] This makes it possible to reduce the size of the outer tub, reduce the amount of water to be supplied into the outer tub, and prevent foreign matter from entering between the rotary drum and the outer tub in front of the heating chamber. By removing the heater attached to the outer part, foreign matter can be removed, and the outer tank can be made substantially round, so that the outer tank body and the outer tank front plate that constitute the outer tank can be easily fitted. Thus, water tightness and workability can be improved.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention comprises a rotating drum having a rotating shaft in a substantially horizontal direction, and an outer tank surrounding the rotating drum. A heater housing chamber having a substantially concave shape is provided, and since the heater is not directly provided in the outer tub, the outer tub can be formed in a substantially perfect circular shape, and the outer tub can be reduced in size. The amount of water used to supply water can be reduced, and even if foreign matter enters between the rotating drum and the outer tank, the foreign matter falls into the heating chamber at the bottom side of the outer tank and is attached from the front of the heating chamber. By removing the heater, foreign matter can be removed, and the outer tank can be made substantially circular, so that the outer tank body and the outer tank front plate that constitute the outer tank can be easily fitted together, Workability can be improved.

According to a second aspect of the present invention, in the first aspect of the present invention, the rotary drum and the outer tub are substantially concentric with each other in a direction perpendicular to the rotary shaft and substantially circular. And a substantially concave heating element housing chamber is provided on the bottom side of the outer tub, so that the center of the rotary drum and the center of the outer tub can be easily adjusted and fixed to the opening of the outer tub. The outer drum side end of the substantially cylindrical packing member and the rotating drum do not become eccentric, and it is possible to prevent the rotating drum from rubbing against the packing member due to the rotation of the rotating drum.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a drain hose is connected to the substantially concave heating chamber, and a hose is connected to a bottom of the substantially concave heating chamber. An inclined surface is formed toward the connection part,
Since the substantially concave heating element storage chamber is provided at the bottom side of the outer tub, a drain hose can be connected to the bottom of the outer tub, and the washing water in the outer tub can be drained easily and reliably. can do.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 1 and FIG.
Is composed of an outer tank main body 21a having a substantially perfect circular shape whose center is the rotation axis 4 and a substantially circular outer tank front plate 21b covering an opening of the outer tank main body 21a. The rotating drum 1 and the outer tub 21 are configured so that the shape in the direction perpendicular to the rotating shaft 4 is substantially concentric with the rotating shaft 4 as a center, and a substantially concave heating element housing chamber for housing the heater 22 on the bottom side. 23 are provided.

The outer tub 21 is provided with a spring body 1 from the body 10.
1, swingably suspended, the vibration at the time of dehydration start is reduced by the vibration isolator 12, and the vibration during the steady dehydration is supported so as not to be transmitted to the body 10, and the vibration at the time of dehydration is reduced. A weight 13 is provided.

As shown in FIG. 3, the outer tub body 21a and the outer tub front plate 21b are wound around the end face which comes into contact with the outer tub body 21a, and the outer rim 21 is formed by tightening the outer circumference of the end face with a band 24 having a V-shaped section. ing. For this reason, the outer tank main body 21a and the outer tank front plate 21b can be easily fitted, and watertightness and workability can be improved. The substantially concave heating element housing chamber 23 is
1 and is fixed to the bottom surface of the outer tub 21 by welding, and a drainage hose 15 is connected thereto.
An inclined surface 26 is formed at the bottom of the hose 3 toward the hose connection portion 25.

A heater mounting plate 27 is fixed to one end of the heater 22, and is integrated with a fastening plate 30 which can be inserted into a heater insertion hole 29 provided in the heater housing chamber 23 via a packing material 28. A screw 31 provided in the packing member 28 is attached by a nut 32, the heater 22 is inserted into the heating element housing chamber 23, and the nut 32 is tightened.
Is compressed between the heater mounting plate 27 and the fastening plate 30 and swells outward, so that the heater 22 is connected to the heater housing chamber 23.
And the packing material 28 closes the heater insertion hole 29. The other end of the heater 22 is sandwiched by a spring member 33 provided in the heater housing chamber 23. 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 in the control device 20 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,
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 22 is energized and the outer tank 21 is energized.
The washing water in the inside is heated while controlling it at a substantially constant temperature.
The outer tub 21 has a cross section having a substantially perfect circular shape centered on the rotary shaft 4, and the rotary drum 1 and the outer tub 21 have a shape in a direction perpendicular to the rotary shaft 4 substantially concentric with the rotary shaft 4 as a center. , The outer tub 21 can be reduced in size,
There is no unnecessary space between the rotary drum 1 and the outer tub 21, and the amount of water to be supplied into the outer tub 21 can be reduced,
It can be heated to a predetermined temperature in a short time.

Further, between the rotary drum 1 and the outer tank 21,
Even if foreign matter enters by mistake, the foreign matter falls into the heating chamber 23 on the bottom side of the outer tank 21, and the foreign matter can be removed by loosening the screw 31 from the front of the heating chamber 23 and removing the heater 22. it can.

Since the shape of the rotating drum 1 and the outer tub 21 in a direction perpendicular to the rotating shaft 4 is substantially concentric with the rotating shaft 4 as a center, the outer tank side end of the packing member 17 is formed. When the rotating drum 1 is rotated at the second rotational speed N2 during the dewatering process without the eccentricity between the rotating drum 1 and the rotating drum 1, the rotating drum 1 and the packing member 17 are rubbed by the rotation of the rotating drum 1. Can be prevented.

When the washing water in the outer tub 21 is drained, a substantially concave heater housing chamber 23 is provided on the bottom side of the outer tub 21, and a drainage hose 15 is connected to the heater housing chamber 23. Since the inclined surface 26 is formed at the bottom of the heating chamber 23 toward the hose connection portion 25, the drainage hose 15
Can be connected to the bottom of the outer tub 21, and the washing water in the outer tub 21 can be easily and reliably drained.

[0029]

As described above, according to the first aspect of the present invention, there is provided a rotating drum having a rotating shaft in a substantially horizontal direction, and an outer tank surrounding the rotating drum. Since the heater housing chamber having a substantially concave shape is provided on the bottom side of the outer tank, the heater is not directly provided in the outer tank, so that the outer tank can be formed in a substantially circular shape, and the outer tank can be reduced in size. The amount of water used to supply water can be reduced, and even if foreign matter enters between the rotating drum and the outer tank, the foreign matter falls into the heating chamber at the bottom side of the outer tank and is attached from the front of the heating chamber. By removing the heater, foreign matter can be removed, and the outer tank can be made substantially circular, so that the outer tank body that constitutes the outer tank can be easily fitted to the outer tank front plate, and watertightness can be obtained. , Workability can be improved.

According to the second aspect of the present invention, the rotary drum and the outer tub have a shape substantially perpendicular to the rotary shaft and substantially concentric with the rotary shaft as a center. Since the substantially concave heating element housing chamber is provided on the bottom side of the tank, the center of the rotary drum and the center of the outer tank can be easily adjusted, and the outside of the substantially cylindrical packing member fixed to the opening of the outer tank. The tank-side end and the rotating drum are not eccentric, and it is possible to prevent the rotating drum from rubbing against the packing member due to the rotation of the rotating drum.

According to the third aspect of the present invention, a hose for drainage is connected to the substantially concave heating chamber, and a slope is formed at the bottom of the substantially concave heating chamber toward the hose connecting portion. Since it is formed, the substantially concave heating element housing chamber is provided on the bottom side of the outer tub, so a drainage hose can be connected to the bottom of the outer tub, and the washing water in the outer tub can be easily removed. And it is possible to reliably drain.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of the drum type washing machine.

FIG. 3 is an enlarged cross-sectional view of a main part of the drum type washing machine with a part cut away.

FIG. 4 is a side sectional view of a conventional drum type washing machine.

FIG. 5 is a sectional view of the drum type washing machine.

FIG. 6 is a sectional view of another example of the conventional drum type washing machine.

[Explanation of symbols]

 Reference Signs List 1 rotating drum 4 rotating shaft 21 outer tank 23 heating chamber

Claims (3)

[Claims] 1. A drum type washing machine comprising: a rotating drum having a rotating shaft in a substantially horizontal direction; and an outer tub enclosing the rotating drum, wherein a substantially concave heating element housing chamber is provided at a bottom side of the outer tub. . 2. A rotary drum and an outer tub, wherein the shape in a direction perpendicular to the rotation axis is substantially concentric with the rotation axis as a center and substantially a perfect circle, and a substantially concave heating element housing is provided on the bottom side of the outer tub. The drum type washing machine according to claim 1, wherein a chamber is provided. 3. The drum-type drum according to claim 1, wherein a drain hose is connected to the substantially concave heating chamber, and an inclined surface is formed at a bottom of the substantially concave heating chamber toward the hose connecting portion. Washing machine.