JPH0318398A - Drum type washing machine - Google Patents

Abstract

PURPOSE:To improve the replacement of laundries in a drum, and also, to easily take the balance against the center of gravity of the drum by providing a plate-like beater placed centripetally at a prescribed interval on the periphery of the inner wall surface of a rotary drum, attached so as to extend in the rotation axis direction and having prescribed height extending over the overall length. CONSTITUTION:An external form of a rotary drum 31 is the same shape as an abacus counter formed by connecting each large diameter part of two truncated cones, supports and fixes the back of the rotary drum 31, while holding roughly horizontally a rotation axis 33, and brought to cantilever support so as to be freely rotatable by a drum support 38 through a bearing. A beater 43 consists of plural pieces of plates attached centripetally to the inner wall surface of the outside cylindrical surface 40 in the drum 31 so as to extend in the rotation axis direction, has prescribed height from the inner wall surface of the outside cylindrical surface, and becomes a valley shape having the same angle as that of the outside cylindrical surface, or a larger angle than that when it is looked at from the inside of the drum. The laundry 42 is raised to the upper part by the beater 43, when the drum 31 rotates, collected to the center part of the drum and dropped down, and by continuously replacing its front and rear positions in the drum 31, high washing force is obtained.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to, for example, dehydration (washing) tubs in home washing machines, commercial washing machines, centrifugal dehydrators such as dry cleaners, or home and industrial use. This invention relates to various types of washing machines having a rotating drum tank, which are applied to fully automatic washing, dehydrating, and drying machines that continuously perform washing, dehydrating, and drying in the same tank.

(Prior Art) An example of a conventional drum-type washing machine is shown in FIGS. 4 and 5.

Figure 4 is a vertical sectional view of the washing machine including the drum rotation axis;
FIG. 2 is a view taken along the line A--A in FIG. 4.

In the figure, 1 is a control unit that controls the operation of the washing machine, 2 is a dial that operates the control unit, 3 is a lid that opens and closes when loading and unloading laundry, 4 is an exterior, and 5 is a washing and dehydrating tank. It is a rotating drum that has many dehydration holes 11 on its circumference for separating water during dehydration, and has multiple dehydration holes 11 that have extremely different heights in the axial direction with the center of the tank as a boundary, and that are connected by a curved line. Glue lids 9, 10, 29, 30 are provided so that their orientations are alternate. Reference numeral 8 denotes an outer tank, and a drain pipe 13 and a drain valve 18 are provided at the bottom, and a moke 12 and a transmission 26 are further attached. Further, the rotating drum 5 has shafts 19 and 27 protruding from the front and rear surfaces of its center, each bearing a bearing 2L28.
It is attached to the outer tank 8 via the shaft 27 on the rear side.
IJ15, H7+/L-17,7
”-The IJ16 is used to shift gears and rotate in response to the rotation of 26. In FIG. 5, 6 is a fishing rod that supports the outer tank 8;
The spring 20 is a leg attached to the bottom surface of the exterior 4.

The washing operation of the drum-type washing machine configured as described above will be explained as follows.

That is, in the "washing" process, water is supplied into the outer tank 8 and the drum 5 from a water supply solenoid valve (not shown), and when the water level reaches the set water level, a pressure switch (not shown) detects this and starts water supply. This is done by turning off the current and simultaneously energizing the motor 12 to rotate the rotary drum 5.

In this case, as described above, each lifter 9, 10, 29.3
Since the height of 0 changes extremely in the axial direction and the direction of change of each lifter is set to be alternate,
The strength and weakness of the cloth raking action works noticeably, and in addition to the shock effect caused by dropping, the changing of cloth, bending and stretching, and frictional effects are promoted, resulting in greater cleaning power than conventional drum-type washing machines. will be significantly improved.

(Problems to be Solved by the Invention) However, the above-mentioned washing machine in which lifters having extremely different heights in the axial direction are attached to the rotating drum also has the following problem.

In other words, in the washing machine mentioned above, the laundry in the drum is rotated back and forth in the axial direction of the drum, but since the laundry tends to become unbalanced with respect to the center of gravity of the drum, this is not the case during washing, especially during the dewatering process. There is a drawback that the unbalance causes excessive vibration of the drum. Therefore, in the above-mentioned washing machine, the rotating drum is supported on both sides in order to reduce the bearing load, but the vibration of the drum body cannot be reduced. Furthermore, if the machine is set to standby on both sides, as shown in the figure, the laundry must be loaded and unloaded from above the drum, and the laundry must be loaded and unloaded through a narrow lid, which significantly impedes work efficiency.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a drum-type washing machine that allows laundry to be easily replaced within the drum, is easily balanced with respect to the center of gravity of the drum, and has excellent workability.

(Means for Solving the Problems) In order to achieve this object, the present invention is installed in the outer shell, has a large number of liquid passage holes on the circumferential surface, and is driven and rotated to wash and wash the laundry inside. In a drum-type washing machine that performs dewatering and drying independently or continuously, it has an outer surface and an inner wall surface that combine large diameter surfaces of truncated cones, and rotates around a horizontal axis connecting the centers of the small diameter surfaces. A drum, and a plate-shaped beater having a predetermined height over its entire length, which is arranged centripetally at a predetermined interval on the circumference of the inner wall surface of the rotating drum and extends in the direction of the rotation axis. It was adopted as a strength.

(Function) When the drum rotates during the washing process, the laundry in the drum is lifted upward by the beater, and because the beater has a valley shape, it gathers in the center of the drum, where it falls. High cleaning power can be obtained by changing the front and rear positions.

On the other hand, the shape of the drum is a so-called Soroban ball shape, and the center of the drum is located close to the center of the elastic support, so that the laundry is always held at a position close to the center of gravity.

Therefore, unharness is reduced and vibration is not generated even during high-speed rotation, and the design allows the drum to be supported in a cantilevered manner, making it possible to provide a laundry entrance and exit at the front of the washing machine, making it easy to take out the laundry. It makes it easier and improves workability.

(Example> Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a side sectional view of a drum-type washing machine according to a typical embodiment of the present invention, and FIG. 2 is a front view thereof. As is clear from these figures, the drum shape according to this embodiment is circular at any position in the cross section perpendicular to the axis, and in the side cross section including the rotation axis, the drum wall surface and the rotation axis are in a predetermined position. It is arranged to form an angle of .

Regarding its fully resting structure, numeral 31 in the figure is a quadruple drum, and its outer shape is exactly the same as a Soroban ball, which connects two truncated conical large diameter parts, and the rotating shaft 33 The rear surface of the rotating drum 31 (the first
(on the left side of the figure) is supported and fixed, and the drum sabot 1 and
It is rotatably supported by a cantilever at 38. A pulley 34 is fixed to the rotating shaft 33, and a drive bell 1/35 and a motor 37
The rotating shaft 33, ie, the drum 31, is rotationally driven through a transmission path of a driving pulley 36 fixed to the rotary shaft 33, that is, the drum 31. A large number of holes 44 for ventilation and water passage are provided in the outer cylindrical surface 40 of the drum 31.

Reference numeral 32 denotes an outer body disposed outside the drum 31, and a drum support 38 made of a bracket supporting the drum rotating shaft 33 is fixed to the back side, and a part of the outer body is attached to the drum support 38.
A blowing part (not shown) for supplying water, steam, heated air, etc. to the inside is fixed.

Furthermore, an openable/closable door 39 is attached to the front surface of the outer drum 32 for supplying and removing laundry into and from the drum 31.

The motor 37 is a power source for driving the drum 31 as described above, and is attached to the lower part of the outer shell 32, and its rotation speed is appropriately set by the speed variable device 50.

The outer cylindrical surface 40 is the outer circumferential wall of the drum 31, and is provided with a large number of holes 44 each having a diameter of several degrees for water passage.

The outer cylindrical surface 40 has a circular cross section perpendicular to the rotation axis direction, and forms a chevron-shaped angle θ with the center portion projecting outward in the axial direction.

42 is laundry, which is textile products such as sheets, towels, and shirts that are washed and dehydrated.

A beater 43 is composed of a plurality of plates attached centripetally to the inner wall surface of the outer cylindrical surface 40 in the drum 31, extending in the direction of the rotation axis, and holds the laundry 42 in two directions as the drum 31 rotates. ” has a dual effect. The beater 43, which is a part of the structure of the present invention, has a shape as shown in FIG. Or, it becomes a valley shape with a larger angle.

FIG. 3 shows the shape of the beater which is cut into the outer box surface 40. The same figure (al is a heater 43 according to the present invention
a, the same figure (bl (Cl is the beaks 43b and 43c taken out for comparison).

The beak 43b is a horizontal beater in which the plane of the plate is in the form of an isosceles triangle with an apex angle θ, and the base thereof is parallel to the axis of rotation, and the beak 43c is a horizontal beater in which the plane is approximately rhombic and protrudes toward the axis of rotation. It is a mountain peak with an apex of

The drum 31 and the outer body 32 are suspended on a vibration isolating spring 5l.

45 is a balance weight attached to the upper part of the outer body 32, and has a weight to maintain balance with the motor 37 attached to the lower part of the outer IP1 32. By installing the eight lance weights 45, the central large diameter portion of the drum 31 is disposed approximately at the center of the spring 51 for elastically supporting the outer shell 32, and its center of gravity can be maintained.

In addition, a water supply pipe 46 for sending washing water into the drum 31 is connected to the upper surface of the outer shell 32, and a water supply pipe 46 is connected to the lower center of the drum 31 of the outer shell 32 during the washing process or during the dehydration process. A drain pipe is provided to drain water from the outer shell 32 by opening and closing the damper 48.

The damper 48 opens when liquid is drained from the outer shell 32, and discharges the liquid to a drainage groove 49 outside the machine.

The rotational speed of the motor 37 is adjusted by a speed variable device 50, and the rotational speed of the motor 37 is controlled so that the drum 31 is rotated at an optimal speed during the washing and dewatering processes.

Next, the operation of the above structure will be explained.

First, in the washing process, a certain amount of water is supplied from the water supply pipe 46 into the drum 31 and the outer body 32. Since the outer cylindrical surface 40 of the drum 31 has a large number of holes 44, the water supplied into the drum 31 passes through the holes 44 and accumulates inside the outer shell 32, and the water level inside the drum 31 gradually rises. It's coming. A water level detection device (not shown) checks the water level, and when the water level reaches a certain level, the water supply is stopped. When the water supply is finished, the door 39 is opened and the laundry 42 is fed into the drum 3l.

Thereafter, the mork 37 is driven to rotate the drum 3 at a constant rotation. At this time, the rotation of the drum 31 is repeated between normal rotation and reverse rotation, which is effective in preventing the laundry 42 from getting stuck. Also, the rotation speed of the drum 3L is 0.6~
0.8G is optimal.

Prewashing is performed by supplying detergent and auxiliary agents into the drum 31 from a detergent and auxiliary agent supply device (not shown). When the pre-washing is completed, the damper 48 is opened and the washing water used for the pre-washing is discharged to the drain #49 through the drain pipe 47, and a sensor (not shown) indicates after a certain period of time or when the pre-washing water has been drained. It is detected and the damper 48 is closed.

Next, washing water is again supplied into the drum 31 in the same manner as above to a certain water level, and detergent and auxiliary agents are supplied into the drum 31 from a detergent and auxiliary agent supply device (not shown).

Here, a steam nozzle (not shown) is operated to blow steam into the water in the outer shell 32 to raise the temperature of the washing water to a certain temperature. This is done by controlling the rotation speed of the moke 37 by controlling the rotation speed variable device 50 of the drum 31. Lift the laundry 42 above the drum 31 with the beater 43,
Dirt is removed from the laundry 42 by mechanical force due to impact with the water surface when the laundry is dropped. In this way, main washing is performed in hot water, and then the drum 31 is rotated at a medium speed to shake off the washing water adhering to the laundry 42 by centrifugal force. At this time, the damper 48 is naturally opened to drain the washing liquid from the drain pipe 47 to the outside of the machine.

Here, regarding the beater 43, see FIG. 3 (al (b) (
a valley-shaped beater 43a in which the upper surface of the peak shown in Cl has an angle substantially equal to or greater than the angle θ of the drum 31;
We have compared the effects of the horizontal beater 43b, which is approximately parallel to the rotating shaft 33 of the drum 31, and the chevron-shaped beater 43c, which is protruded toward the center of the drum, with respect to the chevron-shaped angle θ of the drum 31.

That is, the respective beaters 43a, 43b, 43
The results of a test 11 l2 on the cleaning performance and balance of the drum 31 are shown in the table below, and it was found that the valley-shaped beater 43a was the most excellent.

In other words, the action of the beater 43 is that of the drum 3 in the washing process.
The beater 43 lifts the laundry 42 upwards as the clock rotates, and normally drops it from the lO to 11 o'clock position (when rotating clockwise), but the height of the beater 43 (Fig. 3, L) If it is too large, the laundry 42 will not be able to fall and will rotate along with the drum 31. For this reason, it is necessary to reduce the number of rotations of the drum 31. in this case,
This reduces the number of times the laundry 42 falls within the drum, which causes deterioration in cleaning power.

Further, it goes without saying that if the height of the beater 43 is too low, the laundry 42 cannot be lifted upwards, and the washing performance becomes extremely poor.

The results shown in the table above clearly represent the above.

After that, the water adhering to the laundry 42 is centrifugally dehydrated,
In preparation for the next rinsing process, during this centrifugal dewatering, it is necessary to select the rotational speed of the drum 31 in order to uniformly distribute the laundry 42 within the drum 31 and maintain intermediate balance. This rotation speed is normally 1 on the inner wall of drum 3■.
．． This is a rotation that provides an acceleration of 0 to 1.5G. During rotation to maintain this intermediate balance, if the height of the beaters 43 is too high, the laundry 42 will not fit between the adjacent beaters 43 in a well-balanced manner, and the drum 31 will be subjected to an eccentric load, and its rotational vibration will be reduced. It becomes extremely large, and for safety reasons, it is necessary to stop the machine and take the intermediate clearance again.

For these reasons, it is preferable that the shape of the beater 43 is a valley-shaped beater 43a adopted in the present invention.
Test results showed that 4%.

After the dirty water after washing is dehydrated, the damper 48 is closed and clean water is supplied into the drum 31 again to perform a rinsing process. The rinsing process may be performed in the same manner as the washing process. After the rinsing process, which involves repeated supply and drainage of rinsing water,
Next comes the dehydration process.

In the dewatering process, the drum 31 is first rotated under the control of the variable speed device W50 so that the inner circumference of the drum receives an acceleration of 1.0 to 1.5 G. This is to distribute the laundry 42 contained in the drum 31 almost uniformly on the inner peripheral surface of the drum 31 as described above. After the laundry 42 is uniformly distributed on the inner peripheral surface of the drum 31,
The drum 31 is rotated at high speed, and the water adhering to the laundry 42 is discharged to the outside from the holes 44 of the drum 31 due to centrifugal force.
is ejected from the aircraft through the

Here, the results of testing by changing the chevron angle θ of the drum 31 are based on the patent application No. 63-4 proposed earlier by the present inventors.
As stated in No. 0 5 1 3, θ90°
It has been found that an angle between 160° and 160° is optimal;
Preferably, 120° to 1506° is practical.

(Effect of the invention) By using the drum shape and peak shape shown in the present invention, in the washing process, the laundry is constantly collected in the center of the drum, and the number of drops in the drum is sufficiently reduced. It is extremely effective in improving cleaning performance. In addition, in the dewatering process, the height and shape of the beater can be improved to easily maintain balance in the middle, and the Soroban ball-shaped drum and the appropriate height of the beater make it easy to collect laundry in the center of the drum. This makes it possible to concentrate the load on the center of gravity, making it possible to operate with extremely little vibration.

Furthermore, in the present invention, since the drum can be supported horizontally in a cantilever manner, it is easy to take in and take out laundry, etc., and work efficiency is improved.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a centrifugal dewatering device according to the first embodiment of the present invention, Fig. 2 is a perspective view of Fig. 1, Fig. 3 is a comparison diagram of the beater shape of the rotating drum, and Fig. 4 is a FIG. 5 is a side sectional view showing a conventional drum-type washing machine, and is a view taken along the line A--A in FIG. 4. Explanation of main parts of the figure 31 - Drum 32 - Outer body 37 - Moke 43 - Beater 45 - Balance weight 51 - Spring 17 Fig. 3 (a) (b) Ryo 4 Fig. 2 (C”) Fig. 5

Claims (1)

[Claims] A drum-type washing machine that is installed in the outer shell, has many liquid passage holes on the circumference, and washes, dehydrates, and dries the internal laundry either individually or continuously while being driven and rotated, has a truncated conical shape. A rotating drum that has an outer surface and an inner wall surface that match the large diameter surfaces of the drum, and rotates around a horizontal axis connecting the centers of the small diameter surfaces, and a centripetal drum that is centered at a predetermined interval on the circumference of the inner wall surface of the rotating drum. 1. A drum-type washing machine comprising: a plate-shaped beater having a predetermined height over its entire length, the plate-shaped beater being arranged in a shape and extending in the direction of the rotation axis.