JP3011636B2 - Drum type washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a basket-like drum for accommodating laundry such as clothes in a washing tub, and rotates the drum about a horizontal axis to facilitate the washing process of the laundry. The present invention relates to a drum type washing machine for performing a rinsing process.

[0002]

2. Description of the Related Art A drum type washing machine has a structure in which a basket-shaped drum for accommodating laundry such as clothes is provided in a washing tub, and the drum is rotated about a horizontal axis. In the conventional drum-type washing machine described in Japanese Patent Application Laid-Open No. 4-276293, when washing clothes, the clothes stored in the drum fall from the inner peripheral wall of the drum against the centrifugal force caused by the rotation of the drum. The rotation speed of the drum is varied within a range including the rotation speed. By varying the rotation speed in this manner, the falling trajectory of the clothes inside the drum is changed, and the effect of promoting the stirring of the clothes and performing the washing uniformly can be expected.

[0003]

However, if a large amount of clothes are stored in the drum and the washing or rinsing step is performed, the washing or rinsing is not performed uniformly, resulting in so-called "unevenness". FIG. 6 is a diagram schematically showing a stirring state of clothes inside the drum when a large amount of clothes are housed in the drum and a washing process is performed in the conventional drum-type washing machine. Clothes near the inner peripheral wall of the drum are moved along the inner peripheral wall of the drum with the rotation of the drum, but clothing in the center of the drum rotates only at that location. However, it is difficult to spread, and a sufficient cleaning effect cannot be obtained.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and provides a drum type washing machine capable of uniformly and easily rinsing even when a large amount of clothes are put inside the drum. It is intended to be.

[0005]

According to a first aspect of the present invention, there is provided a basket-like drum for accommodating laundry such as clothes inside a washing tub. wash step of the laundry by the rotating the drum about a horizontal axis, in the drum type washing machine to perform a rinsing cycle, and a motor for rotating the drum, the laundry inside the drum of the drum A first rotation speed that generates a centrifugal force that rotates in a state of being in close contact with the inner peripheral wall surface;
Rotation speed control means for rotating the motor by switching between the second rotation speed and the second rotation speed such that the laundry does not adhere to the inner peripheral wall surface of the drum and falls during rotation.
In the rinsing process, the degree control means first sets the first rotational speed.
The motor is rotated for a predetermined time in degrees and then the second rotation
The motor is rotated at a speed .

[0006]

[0007]

[0008]

In the rinsing process, when the drum is first rotated at the first rotation speed for a predetermined period of time, the water inside the drum sharply rises and the water level rises, and the laundry passes through the water at a high speed. Therefore, the water is easily distributed to the laundry, and the detergent water permeating the laundry is easily removed. Next, when the drum is rotated at the second rotation speed, the laundry that has spread throughout the water is agitated, so that the detergent water permeating the laundry is further removed. For this reason, the efficiency of rinsing can be improved.

[0010] In the second invention, laundry such as clothes is placed inside.
A basket-shaped drum to be housed in the washing tub;
At least by rotating the
Drum-type washing for washing or rinsing laundry
In濯機, a motor for rotating the drum, before
The laundry inside the drum adhered to the inner peripheral wall of the drum
1st rotation speed which produces centrifugal force which rotates in a state
When the laundry is rotating without contacting the inner peripheral wall of the drum,
Switching between the second rotation speed such as falling in the said
Rotation speed control means for rotating the motor,
In particular, the amount of laundry stored inside the drum is detected.
Detecting means for washing the laundry detected by the detecting means.
Further comprising comparing means for comparing the amount with a predetermined value, the said times
The rotation speed control means is provided when the amount of the laundry is equal to or more than a predetermined value.
Switching between the first rotation speed and the second rotation speed
It is characterized by rotating a motor .

Further, the rotation speed control means
When the amount of the laundry is smaller than a predetermined value, the first
Without switching between the rotation speed and the second rotation speed,
Rotating the motor at a rotation speed of 2.
I do.

When the drum is rotated at the first rotation speed, washing and rinsing without unevenness can be performed. According to a more preferred configuration of the present invention, it is determined whether or not the rotation speed is switched according to the amount of the laundry. That is,
When the amount of laundry is large, the first rotation speed at which uniform washing or rinsing is performed is selected. When the amount of laundry is small, the first rotation speed is unnecessary, and the second rotation speed is unnecessary. Only the rotation speed of is selected.

[0013]

[0014]

[0015]

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an electric system of a drum type washer / dryer according to an embodiment of the present invention. FIG. 2 is a vertical sectional view of the drum type washer / dryer of the present embodiment. FIG. FIG. 4 is a flow chart, FIG. 4 is a diagram schematically showing a stirring state of the clothes inside the drum in the present embodiment, and FIG. 5 is a diagram showing a pattern of how to wash in the present embodiment.

First, the overall structure of the drum type washer-dryer of this embodiment will be described with reference to FIG. An outer tub 52 for storing water during the washing and rinsing steps is arranged inside the outer box 50 of the main body of the washing and drying machine. A drum 28 for storing clothes is installed inside the outer tub 52 while being supported by a main shaft 60, and clothes are put into the drum 28 from outside through a clothes inlet 54. A water hole 58 is formed in the peripheral wall of the drum 28, and water supplied to the outer tub 52 flows into the drum 28 through the water hole 58, and water dehydrated from clothes in the drum 28 is removed. It is discharged to the outer tank 52. A baffle 56 is provided inside the drum 28 so as to lift clothes from below to above with rotation. The main shaft 60 is held by a bearing 62 mounted on the outer tub 52, and a main pulley 64 is further mounted thereon. A motor 26 for rotating and driving the drum 28 is disposed below the outer tub 52, and a motor pulley 68 is attached to a rotating shaft of the motor 26. The rotation of the motor pulley 68 is transmitted to the main pulley 64 through the belt 66.

Water for washing and rinsing is supplied by a water supply port 7.
Water is supplied from outside through 0, and the amount of water is adjusted by a water supply solenoid valve 32. Water supplied from the water supply port 70 becomes detergent water through the detergent inlet 72 during the washing process and is poured into the outer tub 52 during the rinsing process, and is poured into the outer tub 52 without passing through the detergent inlet 72 during the rinsing process. Can come off. Unnecessary water in the outer tub 52 is drained through a drain port 74. Drain port 7
4 is opened and closed by a drainage electromagnetic valve 34. A drive voltage is supplied to the motor 26 from the circuit unit 76. Circuit section 76
Accommodates an electric circuit as described later, controls the rotation of the motor 26, and controls the water supply electromagnetic valve 32 and the drain electromagnetic valve 34.
And other operations are controlled.

Next, the configuration of the electric system will be described with reference to FIG. An internal memory of the control / processing circuit 10, which is mainly composed of a microcomputer, stores in advance an operation program for performing a series of steps including washing, rinsing, spin-drying and drying. This operation program is for sequentially executing water supply, cleaning, and drainage steps, for example, in a washing process in response to an operation from the operation unit 12.

The control / processing circuit 10 receives a signal from each unit described later as necessary and outputs a signal for controlling the operation of each unit when executing the processing of each step of the operation program. The control / processing circuit 10 includes a water level detector 14 for detecting a water level inside the outer tank 52 in which the drum 28 is disposed, and a water temperature detector 16 for detecting the temperature of the water stored inside the outer tank 52. Detection signals are input from a drum temperature detector 18 for detecting the temperature of the drum 28 during the drying process and a load amount detector 20 for detecting the amount of clothes stored in the drum 28.

The control / processing circuit 10 performs display on the display section 22 and outputs a control signal for controlling the rotation speed of the motor 26 to the motor drive circuit 24. The motor drive circuit 24 By applying a drive voltage based on this control signal to the motor 26, the motor 2
Rotate 6. As described above, the rotation of the motor 26 is transmitted to the drum 28, and the drum 28 is rotated.
Further, the control / processing circuit 10 includes a water supply solenoid valve 32, a drain solenoid valve 34, a water heater 26 for heating water in the outer tank 52, a drying heater 38 for heating the drum 28, and a drying heater 38. During the stroke, a control signal for controlling the operation or operation of the blower fan 40 for sending air into the outer tank 52 is output to the drive circuit 30. The drive circuit 30 receives the control signal, and receives the water supply solenoid valve 32, the drain solenoid valve 34,
The heater 36 for heating water, the heater 38 for drying, and the blower fan 40 are driven.

Hereinafter, the operation of the washing step will be described with reference to FIGS. 1, 2, 4 and 5 in accordance with the procedure of the control flowchart of FIG. In the washing process, the steps of water supply, washing, and drainage are sequentially performed.

When dirty clothes are stored in the drum 28 by the operator and a key operation for starting the washing process is performed from the operation unit 12, the control / processing circuit 10 causes the washing process to be performed according to the operation program stored in the internal memory. To start. First, water is supplied into the outer tub 52, and the detergent water stored in the outer tub 52 is heated (step S).
10). That is, first, the water supply electromagnetic valve 32 is operated,
Water supply to the outer tub 52 is started. At this time, the supplied water passes through the detergent inlet 72, becomes detergent water, is injected into the outer tank 52, and is stored. The water level of the detergent water is detected by the water level detector 14, and when the control / processing circuit 10 detects that a predetermined amount of water has accumulated, it outputs a control signal to close the water supply electromagnetic valve 32. Next, the heating water heater 36 is operated to heat the detergent water in the outer tub 52. The water temperature is detected by a water temperature detector 16 and controlled /
When the processing circuit 10 detects that the water has been heated to the predetermined water temperature, it outputs a control signal to stop the heating. At this point, the preparation for proceeding to the cleaning stage is complete.

Prior to the washing step, an operation is performed to detect the amount of clothing contained in drum 28. The control / processing circuit 10 outputs a control signal to the motor drive circuit 24 to rotate the drum 28 at a predetermined rotation speed. The load amount detector 20 detects a voltage value of a voltage applied to the motor 26 when the rotation speed of the motor 26 reaches a predetermined rotation speed, and detects a load amount L based on the voltage value (step S12). That is, when the amount of clothing is large, the load on the motor 26 is large, so a high applied voltage is required to obtain a predetermined rotation speed. Conversely, when the amount of clothing is small, the load on the motor 26 is small. Since it is small, the applied voltage for obtaining the same predetermined rotation speed may be low. Utilizing this, the load amount detector 20 converts the voltage applied to the motor into a load amount L.

Next, in the control / processing circuit 10, the load amount L is compared with a predetermined value (step S1).
4). If the load L is larger than the predetermined value, the drum 2
The rotation speed (first rotation speed) at which the clothes inside the drum 8 are rotated while being attached to the inner peripheral wall surface of the drum 28 by the centrifugal force, and the clothes inside the drum 28 are opposed to the drum 28 against the centrifugal force. The motor 26 switches the rotation speed (second rotation speed) such that the motor 26 rotates in a state of falling during the rotation of the motor 26.
The speed is controlled so that the motor rotates. Here, the washing method when the drum 28 is rotated at the first rotation speed is referred to as “centrifugal washing”, and the washing method when the drum 28 is rotated at the second rotation speed is “slap washing”. Shall be called.

FIG. 4A shows the drum 28 during centrifugal washing.
FIG. 4B shows the state of agitation of the clothes inside the drum 28, and FIG. For example, when the drum diameter is 500 [mm], the rotation speed during centrifugal washing is 100 [rpm], and the rotation speed during tap washing is 50.
[Rpm]. At the time of centrifugal washing, all the clothes stored in the drum 28 rotate together with the rotation of the drum 28 while being attached to the inner peripheral wall surface of the drum 28. At this time, the detergent water inside the drum 28 undulates violently, and the clothing collides violently with the surface of the detergent water, so that the detergent water spreads all over the clothing. On the other hand, at the time of washing by tapping, the clothes are carried upward from the bottom with the rotation of the drum 28, but fall during rotation as shown by an arrow in the figure due to a weak centrifugal force, and collide with the water surface. As a result of this collision, dirt attached to the clothes is washed away.

Here, centrifugal washing and tap washing are alternately performed three times. When the control / processing circuit 10 determines that the load amount L is equal to or larger than the predetermined value, the control / processing circuit 10 resets the variable n (step S16). The variable n is a variable for designating the number of repetitions of a washing pattern in which centrifugal washing and tap washing are executed once each. Next, a control signal is output to the motor drive circuit 24 so as to rotate the motor 26 at the first rotation speed. At this time, centrifugal washing is performed (step S18).

After continuing the centrifugal washing until the operating time of the centrifugal washing reaches the predetermined operating time A (step S20), the control / processing circuit 10 reduces the rotation speed of the motor 26 to the second rotation speed. A control signal is output to the motor drive circuit 24 to rotate the motor. At this time, a tap wash is executed (step S22). If the smashing operation is continued until the smashing operation time reaches the predetermined operation time B (step S24), 1 is added to the variable n to obtain a new variable n (step S26).

Thereafter, until the variable n becomes 3 (step S
28), the processing from step S18 to step S28 is repeated. Thereby, as shown in FIG. 5, centrifugal washing and tap washing are alternately repeated three times each. When the washing step is completed, the control / processing circuit 10 outputs a control signal to operate the drain electromagnetic valve 34, and drains the detergent water in the outer tub 52 through the drain port 74 (step S34). . When drainage is completed, a series of washing steps is completed.

In this case, although the washing by tapping alone causes unevenness of washing, the washing unevenness can be effectively eliminated by combining the washing with centrifugal washing. In this case, the operation time A is desirably shorter than the operation time B. For example, as shown in FIG. 5, when centrifugal washing and tap washing are alternately repeated three times each, A is 30 seconds, B is 4 minutes 30 seconds,
It is preferable that the cleaning time be 15 minutes in total.

When the control / processing circuit 10 determines that the load amount L is smaller than the predetermined value, the motor drive circuit 24 controls the motor 26 to rotate at the second rotation speed from the beginning.
And outputs a control signal (step S30). At this time, only the tap washing is performed, and if a predetermined operation time has elapsed (step S32), the rotation of the motor 26 is stopped and the drain solenoid valve 34 is operated (step S3).
4).

Although the above description has been made with respect to the washing process, the rotation control corresponding to the control flowchart of FIG. 3 can be performed also in the rinsing process. In the case of the rinsing step, the motor 2 as described above is used during the rinsing step in performing the water supply, rinsing, and draining steps.
6 is performed. After draining the sewage after the rinsing step, water is supplied again and the rinsing is repeated. In particular, when rinsing is performed, the water for rinsing is stained by a single “washing and washing”. Therefore, it is preferable to set the variable n = 1 in the control flowchart of FIG.

That is, first, "centrifugal rinsing" corresponding to "centrifugal washing" is executed at the first rotational speed, and then "slap rinsing" equivalent to "slap washing" is executed at the second rotational speed. I do. Then, after draining the sewage and newly supplying water, centrifugal rinsing and tap rinsing are performed once again (or tap rinsing is performed once again).

In the above-described embodiment, the method of combining centrifugal washing and tap washing, for example, the operating times A and B of each washing, the number of repetitions n, and the rotation speed of the motor 26, etc. It can be changed according to various conditions such as the type of fiber, the diameter of the drum, and the height of the baffle 56 inside the drum.

The method of detecting the amount of clothing by the load detector is not limited to the method of the above-described embodiment, and various methods such as directly measuring the weight of the clothing inside the drum using a weight sensor are applied. Can be done.

When performing the centrifugal washing or the tap washing, the rotation direction of the drum may be reversed during the rotation.

Further, in the above embodiment, the washing is performed by a combination of the two rotation speeds of the first and second rotation speeds. However, as described in the above-mentioned prior art, the first and second rotation speeds are used. The rotation speed of the motor may be varied within a range including two rotation speeds.

[Brief description of the drawings]

FIG. 1 is an electric block diagram of a drum type washer / dryer according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a drum type washing and drying machine according to an embodiment of the present invention.

FIG. 3 is a control flowchart of a washing step in the embodiment of the present invention.

FIG. 4 is a schematic view showing a state of stirring clothes inside a drum according to the embodiment of the present invention.

FIG. 5 is a view showing a pattern of a washing method in the embodiment of the present invention.

FIG. 6 is a schematic view showing a stirring state of clothes when a large amount of clothes are stored in a drum in a conventional drum type washing machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Control / processing circuit (comparison means and rotation speed control means) 20 ... Load amount detector (detection means) 24 ... Motor drive circuit 26 ... Motor 28 ... Drum 52 ... Outer tank

Continuing on the front page (72) Inventor Kenji Nakagawa 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Seyuki Suho 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka (56) References JP-A-64-17689 (JP, A) JP-A-4-276293 (JP, A) JP-A-4-336097 (JP, A) (58) Fields surveyed ( Int.Cl. ⁷ , DB name) D06F 33/02

Claims (3)

(57) [Claims] 1. A provided a cage-like drum housed inside the laundry such as clothes in the washing tub, wash step of the laundry by the rotating the drum around a horizontal axis, a rinsing cycle In the drum type washing machine to be executed, a motor that rotationally drives the drum, and a first rotation speed that generates a centrifugal force such that the laundry inside the drum rotates in close contact with an inner peripheral wall surface of the drum. , and a rotational speed control means for rotating the motor such second by switching the rotational speed as the laundry is dropped in the middle of rotation without close contact with the inner peripheral wall surface of the drum, the rotational speed control means Is in the rinsing process
First, the motor is rotated at a first rotation speed for a predetermined time.
And then rotating the motor at a second rotation speed . 2. A basket-shaped housing for storing laundry such as clothes therein.
A drum is provided in the washing tub, and the drum is rotated around a horizontal axis.
The washing process of the laundry at least
In a drum-type washing machine for performing a rinsing process, a motor for rotating and driving the drum and a laundry inside the drum are in close contact with an inner peripheral wall surface of the drum.
The first rotation that produces a centrifugal force that rotates in an inclined state
Speed and the laundry rotates without contacting the inner peripheral wall of the drum
Before switching by switching to the second rotation speed that falls on the way
A rotational speed control means for rotating the serial motor, provided with a detection for detecting the amount of laundry accommodated in the interior of the drum
Means for comparing the amount of laundry detected by the detection means with a predetermined value.
Further comprising comparing means for compare, and the rotational speed control means, the amount of the laundry is higher than a predetermined value
Switch between the first rotation speed and the second rotation speed in case of
Washing the drum by rotating the motor
Rinsing machine. 3. The washing machine according to claim 2, wherein the rotation speed control means includes a
If the amount is less than the predetermined value, the first rotation speed and the second rotation speed
Without switching between rotational speed, at a second rotational speed
The motor according to claim 2, wherein the motor is rotated.
Drum type washing machine.