JP3436644B2 - 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 relates to a drum type washing machine having a horizontally mounted drum.

[0002]

2. Description of the Related Art A conventional drum type washing machine rotates a drum at a low speed at a speed capable of tumbling (oscillating) an object to be treated at the time of washing, and stretches the drum to an inner surface of a peripheral wall of the drum at the time of dehydration. It rotates at a high speed without falling,
The mainstream is tapping by drum tumbling,
It took a long time and only limited low-foaming detergent could be used.

As a drum type washing machine to improve this, the applicant of the present invention, as described in Japanese Patent Application No. 8-54335 previously proposed, stores the washing liquid in the drum in advance and then the washing liquid (water) from the baffle. It is proposed that the cleaning time and the defoaming effect are shortened to a certain extent by mixing jet air with a mixture of 1: 1 and air.

[0004]

However, in the drum type washing machine described in Japanese Patent Application No. 8-54335, the cleaning liquid contains a large amount of air, so that the tumbling effect is reduced due to foaming in the drum. It became a thing.

Along with this, the cleaning water is still infiltrated into the object to be treated, and the circulation pump slightly idles.

Further, in the case of a high capacity, the volume of the cloth is high, so that the effect of jet injection cannot be exerted on the entire cloth.

In view of the above problems, it is an object of the present invention to provide a drum type washing machine which improves the tumbling effect.

[0008]

In order to achieve the above object, a drum type washing machine according to claim 1 of the present invention includes a drum which is rotatably supported about a horizontal axis and accommodates an object to be treated. A rotation driving means for rotating the drum, a water supplying means for supplying washing liquid into the drum, a circulation means for injecting the discharge liquid from the drum into the drum again, and a rotation speed of the rotation driving means. in the drum type washing machine and a control means for controlling, said by the circulation means Dora
Injection from the front side of the drum to the center side of the drum
In addition, multiple nozzles are formed by changing the angle little by little.
When the object to be treated is washed with the washing water, the control unit ejects the rotational speed of the rotation drive unit to the rotational speed at which the object to be tumbled in the drum and the object to be processed. It is characterized in that the number of revolutions of an object sticking in the drum is alternately controlled.

The drum type washing machine according to a second aspect of the present invention is the drum type washing machine according to the first aspect, further comprising a processing amount detecting means for detecting the amount of the processing object, and the control means. Is characterized in that the rotation number of the rotation driving means is controlled on the basis of the output from the processing amount detecting means.

Further, a drum type washing machine according to a third aspect of the present invention is the drum type washing machine according to the first aspect, further comprising unbalance detecting means for detecting a deviation of the object to be processed in the drum, When the output of the unbalance detection means is below a predetermined level when the control means controls the rotation speed of the rotation drive means to a substantially upper limit value of the rotation speed at which the object can be tumbled in the drum. Only, the number of rotations of the rotation driving means is controlled to the number of rotations at which the object to be processed sticks in the drum.

In addition, the drum type washing machine according to a fourth aspect of the present invention is the drum type washing machine according to the first aspect, wherein the control means causes the rotation speed of the drum immediately before the end of washing to be the highest during washing. It is characterized in that the number of rotations of the rotation driving means is controlled so as to rotate by a number.

According to the above structure, in the drum type washing machine according to claim 1 of the present invention, the control means controls the rotation speed of the rotation driving means when the object to be treated is washed with the washing water. Since the number of revolutions of the object to be tumbled in the drum and the number of revolutions of the object to be stuck in the drum are alternately controlled, the cleaning liquid does not completely penetrate into the cleaning liquid. Can be quickly and completely permeated, and the object to be completely permeated with the cleaning liquid can be efficiently dehydrated and absorbed to be cleaned.

Further, a drum type washing machine according to a second aspect of the present invention is the drum type washing machine according to the first aspect, further comprising a treatment amount detecting means for detecting the amount of the treatment object, and the control means. Is configured to control the number of rotations of the rotation driving means based on the output from the object to be processed detecting means, so that the most effective cleaning can be performed according to the amount of the object to be processed.

Further, a drum type washing machine according to a third aspect of the present invention is the drum type washing machine according to the first aspect, further comprising unbalance detecting means for detecting a deviation of the object to be processed in the drum, When the output of the unbalance detection means is below a predetermined level when the control means controls the rotation speed of the rotation drive means to a substantially upper limit value of the rotation speed at which the object can be tumbled in the drum. Only, since the rotational speed of the rotation driving means is controlled to the rotational speed at which the object to be processed sticks in the drum, it is possible to prevent the vibration due to the imbalance of the object to be processed and the accompanying noise.

In addition, the drum type washing machine according to a fourth aspect of the present invention is the drum type washing machine according to the first aspect, wherein the control means causes the rotation speed of the drum immediately before the washing is the highest during the washing. Since the number of rotations of the rotation driving means is controlled so as to rotate at a certain number, it is possible to improve the dehydration efficiency after the cleaning is completed.

[0016]

DETAILED DESCRIPTION OF THE INVENTION A drum type washing machine according to an embodiment of the present invention will be described below with reference to the drawings.

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

The drum type washing machine according to the present embodiment is
A drum 2 having a plurality of holes 1 in a part for accommodating a laundry (object to be processed) S, a water tank 3 for rotatably supporting the drum 2, and a rotation drive device (rotation for rotating the drum 2 in the normal and reverse directions). Drive means) 4, at least one injection nozzle 5 for injecting a washing liquid (cleaning liquid or rinsing liquid) from the front side of the drum 2 to the center of the drum 2, and an injection device 6 for operating the injection nozzle 5. ing.

The water tub 3 has a horizontal cylindrical shape with a packing 7 formed in the front surface to form a laundry inlet / outlet. The upper surface of the water tank 3 is suspended by a spring and the lower surface is supported by a damper. There is. By these,
It has a structure for holding the water tank 3 and damping the vibration of the water tank 3.

A weight is attached to the water tank 3 to reduce vibrations when the drum rotates. Further, shelves 9 are attached to the four corners of the bottom surface of the washing machine body 8 to block the transmission of vibration to the floor and the like. An opening 10 communicating with the packing 7 is formed on the front surface of the main body 8 of the washing machine, and a front door 11 for sealing the packing 7 is openably and closably attached.

The front drum 2 is formed in a cylindrical shape having an opening 12 on the front surface, and a part of the front drum 2 is provided with a large number of holes 1 provided so that water in the laundry can be centrifugally dehydrated. On the inner peripheral wall of the drum 2, three baffles 13 are formed at equal intervals in parallel with the axial direction.

The rotation receiving portion 14 formed on the rear surface of the drum 2
A horizontal shaft 15 is fixed to the water tank 3 and
Is rotatably supported by the bearing 16 penetrating the rear wall,
A drive pulley 17 is attached to the tip thereof.

A motor 18 capable of rotating in the forward and reverse directions is attached to the lower surface of the water tank 3, and a motor pulley 20 is attached to an output shaft 19 of the motor 18. This motor pulley 20
The drive pulley 17 and the drive pulley 17 are connected to each other. That is, the power for rotating the drum 2 is generated by the output shaft 19 of the motor 18, the motor pulley 20, the drive belt 2
1, transmitted to the horizontal shaft 15 via the drive pulley 17, and these constitute the rotary drive device 4.

The injection nozzle 5 is mounted on the packing 7 on the front surface of the drum 2 or between the front door 11 and the drum 2. The structure will be described with reference to FIG. FIG. 2 is a perspective view showing the injection nozzle.

The injection port 5 which is finer than the inlet 5a at the tip
A plurality of b are formed by gradually changing the angle when viewed from the entrance 5a. With such a shape, the washing liquid has a high flow velocity when it reaches the injection port 5b from the inlet 5a, and when it flows out from the injection port 5b, the flow is constricted and the cross-sectional area becomes small, so that the washing liquid can be injected in a straight line. Since it is possible to inject it in each direction of the injection port 5b, the laundry S in the drum 2 can be evenly ejected.

The injection device 6 includes a circulation pipe 22 connected to each injection nozzle 5 and a tank 23 for storing the washing liquid.
And pressurizing the washing liquid from the tank 23 to the circulation pipe 22.
And a pump 24 for sending to.

The pump 24 is the motor 1 of the drive unit 4.
A water stop valve 26 is interposed in a connection pipe 25 that connects the tank 23 and the pump 24 with each other and is driven by a motor different from the motor 8. The circulation pipe 22 communicates with the injection nozzle 5 before the packing 7.

Further, the drainage port 2 formed on the lower surface of the water tank 3
7 and the tank 23 are provided with a drainage pipe 28, a drainage valve A29 is provided in the drainage pipe 28, and a circulating means for circulating the washing liquid together with the injection device 6 is configured. Lint filter 30 in the drain pipe 28
Is detachably provided, and a take-out port 31 is formed on the front side of the washing machine body 8 so that the lint can be taken out easily.
A drain hose 33 having a drain valve B32 interposed therein is connected to the tank 23, and a connection pipe 25 is branched from the drain hose 33 upstream of the drain valve B32. In addition,
A water supply pipe 35, in which a water supply valve 34 is interposed, is connected to the upper part of the water tank 3 and is connected to a water supply, and a water supply sensor 36 including a differential pressure type, electromagnetic type, positive displacement type, ultrasonic type flow rate sensor or the like.
Is attached.

Further, a water amount sensor 37 including a water level sensor and a weight sensor for detecting the amount of accumulated water is attached to the tank 23, and a defoaming device 38 for suppressing foaming of the washing liquid is provided. The defoaming device 38 is attached to the side surface, the bottom surface or the upper surface of the tank 23 to heat the bubbles to break the bubbles, to irradiate ultrasonic waves having a frequency of 20 kHz to break the bubbles, and to defoam such as silicone. It consists of any one of those that drop the agent to defoam. The defoaming device 38 eliminates bubbles in the tank 23,
The suction of bubbles into the pump 24 is controlled, and the deterioration of the capacity of the pump 24 can be prevented.

In the drum type washing machine constructed as described above, the rotary drive unit 4, the injection unit 6 and the respective valves are controlled by the control unit 39 comprising the microcomputer shown in FIG. 3 in accordance with the washing, rinsing and dehydrating steps. Drive control is performed, and each process is executed based on an input from an operation key of an operation panel provided on the outer surface of the washing machine main body 8 and output signals of the water supply sensor 36, the water amount sensor 37, the temperature sensor, the dirt sensor, and the like. . FIG. 3 is a block diagram of the control device 39.

As shown in FIG. 3, the control device 39 includes a water supply amount detection circuit 40 for detecting the water supply amount by the detection signal from the water supply sensor 36 and a tank water amount detection circuit for detecting the water amount by the detection signal from the water amount sensor 37. 41, both circuits 40,
A control circuit 42 that calculates the amount of laundry by the signal from 41 and sets operating conditions, a water supply valve drive circuit 43 that drives the water supply valve 34 by the drive signal from the control circuit 42, and the rotation speed of the drum 2 during washing. And a drum rotation drive circuit 44 for driving the motor 18 so as to change from low speed to high speed or from high speed to low speed. The control device 3
Reference numeral 9 denotes a drive circuit (not shown) for driving each valve,
A drive circuit (not shown) for the injection device 6 and the like are also provided.

In the method of calculating the amount of laundry, the difference between the amount of water supplied at the start of washing and the amount of water in the tank 23 is the amount of water supplied to the laundry S. First, this difference is obtained, and the amount of water supplied depends on the material of the laundry S. Since the amount is different, the amount of laundry is calculated by multiplying the coefficient according to the material. The material of the laundry S is input at the start of operation. Further, as a method of calculating the laundry amount, apart from the above method, the control device 39
Controls the motor 18 to rotationally drive the drum 2 at a predetermined high speed and then stops the driving, and detects the time until the rotating drum 2 comes to rest by inertia, and the amount of laundry in the drum 2 is detected. It may be a method of judging.

Further, a vibration detecting means (not shown) which is an unbalance detecting means having a vibration sensor for detecting the vibration of the water tank 3 is provided, and this vibration detecting means is the rotation direction of the drum 2 of the vibration of the water tank 3. It is attached so as to detect the horizontal component or the vertical component that is parallel to, and detects the vibration when the drum 2 is started up to the number of rotations such that the cloth sticks to the drum, and the low vibration and efficient start-up are performed. Signal the controller 39 to do so. Examples of the vibration sensor include a displacement sensor that directly detects the amplitude of the water tank 3 and the water tank 3.
An acceleration sensor that uses the piezoelectric effect of a piezoelectric element, such as a crystal or ceramic, that outputs an electric signal proportional to the acceleration applied to the sensor can be given.

For example, the principle of using the acceleration sensor is as follows. The weight in the housing of the sensor applies a force to the piezoelectric element due to the vibration from the outside, and the stress of the piezoelectric element causes the balance between the positive ions and the negative ions to be lost to generate electric charges. The charges are accumulated in the electrodes and finally output as a vibration waveform through the vibration detection circuit. The amount of stored charge is proportional to the applied force, which is proportional to the acceleration. The concept of how to take the value of the output waveform of the vibration detecting means (PP value in this embodiment) is shown in FIG.
Described in. The output of the vibration detecting means is determined only by the value between the peaks that cross the line representing zero. For example, in the case of a waveform such as (a), a value between the peak P1 and the peak P2 that does not cross zero, and a peak P
The value between 3 and the peak P4 is ignored, and only the value between the peak P1 and the peak P3 across zero is detected. In the case of the waveform as shown in (b), the value between both peaks crossing zero is detected.

The operation of the drum type washing machine having the above structure will be described below. First, after the laundry S is put in the drum 2, the amount of detergent corresponding to the laundry S is put into a detergent inlet (not shown) provided in the water supply pipe to start washing. Further, the amount of laundry is detected by the method for calculating the amount of laundry and the required amount of water is supplied.

Washing software for calculating the laundry amount from the water supply amount and the tank water amount will be described with reference to FIG. First, the water supply valve 34 and the drain valve A29 are opened to supply water, and the water supply sensor 3 detects the water supply amount and the water amount sensor 37 detects the tank water amount to calculate the laundry amount to supply the required water amount, and then supply the water supply valve 34 and The drain valve A29 is closed, the motor 18 is driven, and the drum 2 is rotated at a rotation speed (about 30 to 70 rpm) at which tumbling is possible. One minute after the start of rotation, the drain valve A29 and the water shutoff valve 26 are opened, the pump 24 is driven, and the cleaning liquid is sent to the circulation pipe 22 and injected into the drum 2 from the injection nozzle 5. 1-2 minutes after the start of injection (after the cleaning liquid has penetrated into the laundry to some extent),
The rotation speed of the drum 2 is alternately repeated at a rotation speed at which the cloth can be tumbled and at a rotation speed such that the cloth sticks to the drum at regular intervals, and the volume of the laundry S is reduced, and the jets reach the back of the drum 2. To be able to jet up to. This promotes the distribution of the cleaning liquid on the laundry S and improves the cleaning liquid. Immediately before the end of cleaning, the drain valve A29 is opened and the drum 2
At the time of washing, it is rotated at the highest rotation speed for 30 seconds or more, and the intermediate dehydration operation is started. The drain valve B32 is opened when the intermediate dehydration is started, and at the same time, the water stop valve 26 is closed. This allows
Before the start of the intermediate dehydration, it becomes a state close to the partial dehydration operation,
The intermediate dehydration time can also be shortened.

Washing software for rotating the drum 2 at a predetermined high speed to calculate the amount of laundry at the start of washing will be described with reference to FIG. First, the water supply valve 34 is opened to supply water, and after 30 seconds to 1 minute from the start of water supply, the rotation of the drum 2 is started at a tumblable rotation speed (about 30 to 70 rpm). After the water supply is completed, open the drain valve A29 to open the drum 2
Drain the cleaning liquid inside. When the water amount sensor 37 of the tank 23 detects the cleaning liquid, it sends a signal to the control device 39, and the control device 39 opens the water stop valve 26 to drive the pump 24 to send the cleaning liquid to the circulation pipe 22, and the injection nozzle 5 to the drum 2
To inject. After the start of injection, the washing software is the same as that used when the laundry amount is calculated from the water supply amount and the tank water amount.

Next, the operation of raising the rotation speed of the drum 2 to a rotation speed at which the cloth sticks to the drum 2 during cleaning and dehydration will be described with reference to the flow charts of FIGS. 7 and 8.

First, in step # 5, the drum 2 is accelerated in the normal direction to rotate the drum 2 in the normal direction at a low speed. 1.5 after starting rotation
It is excluded from the vibration detection target for a second, and when 1.5 seconds has elapsed, it is determined in step # 10 whether the PP (peak-to-peak) value of the output waveform of the vibration detection means is equal to or less than the predetermined value A. .

The predetermined value A indicates that when the PP value is not less than this value, the vibration of the drum 2 is so large that the drum 2 cannot continue to rotate (for example, when the vibration acceleration is 5. 0 m / s ² ) and the PP value is equal to or less than A, the process proceeds to step # 15. If the PP value is not equal to or less than A, the process proceeds to step # 35 to stop the drum 2, return to step # 5, and rotate the drum 2 again.
As a result, the laundry in the drum 2 rolls and the unevenness of the laundry changes. Then, in step # 10, P-
It is determined whether the P value is A or less.

Next, at step # 15, it is judged whether or not the rotation speed of the drum 2 has reached a predetermined low speed rotation speed F. This F is approximately the upper limit of the rotation speed (for example, 70 rpm) at which a part of the laundry moves (that is, the laundry swings) while the laundry sticks to the inner surface of the peripheral wall of the drum 2. Drum 2
If the number of rotations of F has reached F, the process proceeds to step # 20, the drum 2 is maintained at a low speed, and the process proceeds to step # 25. If the rotation speed of the drum 2 has not reached F, step # 5
Return to.

Next, in step # 25, it is determined whether the PP value of the output waveform of the vibration detecting means is less than or equal to the predetermined value E (primary determination). This E is for determining whether or not the drum 2 can be started up at high speed rotation (for example, 0.08 mm in amplitude), and if the PP value is E or less, step # 40. Proceed to (Fig. 8), drum 2
Accelerate. If the PP value is not equal to or less than E, the process proceeds to step # 30, and it is determined whether or not a predetermined time T (for example, 20 seconds) has elapsed since the drum 2 started to rotate,
If it has not elapsed, the process returns to step # 20, and if it has elapsed, the process proceeds to step # 35 to change the unevenness of the laundry, and the process starts from step # 10.

Next, at step # 45, it is judged whether the PP value of the output waveform of the vibration detecting means is the predetermined value A or less, and if it is A or less, the process proceeds to step # 50, and A or less. If not, the process proceeds to step # 35, the degree of unevenness of the laundry in the drum 2 is changed, and the process is repeated from step # 10. Next, in step # 50, it is determined whether or not the rotation speed of the drum 2 has reached the second rotation speed C. This C is the number of revolutions at which the vibrating body including the water tank 3 resonates (for example, 20
0 rpm), if the rotational speed of the drum 2 has not reached C, the process returns to step # 40, and if it has reached C, the process proceeds to step # 55 to maintain the drum 2 at a constant speed and proceeds to step # 60. .

Next, in step # 60, it is judged whether or not the PP value of the output waveform of the vibration detecting means is the predetermined value A or less (secondary judgment). 6
5, the drum 2 is switched to high speed rotation, and if not equal to or less than A, the process proceeds to step # 35 to change the degree of unevenness of the laundry in the drum 2, and the process is repeated from step # 10.
Next, at step # 70, P- of the output waveform of the vibration detecting means
It is determined whether the P value is less than or equal to the predetermined value B.

This B indicates that when the PP value is not less than this value, the vibration of the drum 2 is so large that the drum 2 cannot continue to rotate. If the PP value is B or less in step # 70, the process proceeds to step # 75, and if it is not B or less, the process proceeds to step # 35 to change the degree of unevenness of the laundry in the drum 2, and then step # 1.
Start over from 0.

Next, at step # 75, it is determined whether the rotation speed of the drum 2 has reached a predetermined high speed rotation speed D (for example, 1000 rpm). If the rotation speed has not reached D, step # 75 is performed. Returning to 70, if D has been reached, proceed to step # 80. Next, in step # 80, it is determined whether or not a predetermined time has elapsed. If it has not elapsed, the process returns to step # 70, and if it has elapsed, the process proceeds to step # 85 to rotate the drum 2. Stop and finish the process.

As shown in FIG. 9, the number of rotations of the drum is 60.
At rpm, the fluctuation of the vibration value is large and it lasts for a long time, so that proper startup cannot be performed. When the rotation speed of the drum 2 is 70 rpm or 80 rpm, a waveform with low vibration appears as appropriate, and proper startup is possible. However, 8
At 0 rpm, in this example, the vibration changes to a periodic vibration after 5 seconds, and the movement of the laundry cannot be expected even if it is rotated for a long time. Further, at 90 rpm, the vibration is periodic except for an unstable period at the start of rotation of the drum 2, and no movement of the laundry can be expected no matter how many times it is rotated. As is clear from the above, 70 rp
The range of m or more and 80 rpm or less is most suitable for the rotation speed F at the time of the start determination.

When the rotation speed of the drum 2 is alternately repeated at a rotation speed at which the cloth can be tumbled and at a rotation speed such that the cloth sticks to the drum, the weight of the cloth is the rating of the washing machine. If the capacity is almost the same, the volume of the cloth is too large to wash the drum by tumbling only, and there is no space for the cloth to be replaced inside the drum. Therefore, at a rotation speed (about 200 rpm or more) that sticks to the drum. The rotation time is required to be about a quarter of the rotation time at the rotation speed at which tumbling is possible. If the weight of the cloth is less than half of the rated capacity of the washing machine, the cloth is sufficiently replaced by the tumbling of the drum. Therefore, the rotation time at the number of rotations (about 80 rpm or more) that sticks to the drum is It may be less than half the rotation time.

As a result, even in the case of high-volume washing, the effect of washing by spraying the washing liquid and tumbling the drum can be provided.

After the completion of the intermediate dehydration, the drain valve B32 is closed, the water supply valve 34 is opened, the drain valve A29 is closed and the reservoir rinse is performed, or the drain valve A29 and the water stop valve 26 are opened and the pump 24 is driven to perform the circulation jet rinse. After that, the drain valve B32 is opened to drain water, and then dehydration is performed. This rinsing step is performed 2-3 times to complete the washing.

As described above, the drum type washing machine for washing the laundry S by spraying the cleaning liquid and tumbling the drum 2 can efficiently wash the laundry S having a large capacity in a short time and improve the washing ability. it can.

Further, it is possible to apply a mechanical force to the laundry S to reduce the volume thereof and perform the jet injection by the injection nozzle 5 to the inner part of the drum 2.

[0053]

As described above, according to the first aspect of the present invention.
According to the drum type washing machine as described above, the control means sets the rotation speed of the rotation drive means to the tumbling speed of the object to be tumbled in the drum when the object to be processed is washed with the washing water. And the number of rotations of the object to be treated are alternately controlled in the drum, the cleaning liquid can quickly and completely penetrate into the object to which the cleaning liquid has not completely penetrated, and The completely permeated object can be efficiently dehydrated and absorbed to be washed. Thereby, the object to be processed can be efficiently cleaned, and the cleaning time can be shortened. Therefore, the washing time can be shortened.

The drum type washing machine according to a second aspect of the present invention is the drum type washing machine according to the first aspect, further comprising a processing amount detecting means for detecting the amount of the processing object, and the control means. Is configured to control the number of rotations of the rotation driving means based on the output from the object to be processed detecting means, so that the most effective cleaning can be performed according to the amount of the object to be processed.

Further, a drum type washing machine according to a third aspect of the present invention is the drum type washing machine according to the first aspect, further comprising an unbalance detecting means for detecting a bias of the object to be processed in the drum, When the output of the unbalance detection means is below a predetermined level when the control means controls the rotation speed of the rotation drive means to a substantially upper limit value of the rotation speed at which the object can be tumbled in the drum. Only, since the rotational speed of the rotation driving means is controlled to the rotational speed at which the object to be processed sticks in the drum, it is possible to prevent the vibration due to the imbalance of the object to be processed and the accompanying noise.

In addition, the drum type washing machine according to a fourth aspect of the present invention is the drum type washing machine according to the first aspect, wherein the control means causes the rotation speed of the drum immediately before the end of washing to be the highest during washing. Since the number of rotations of the rotation driving means is controlled so as to rotate at a certain number, it is possible to improve the dehydration efficiency after the cleaning is completed. Therefore, the dehydration time can be shortened and the washing time can be shortened.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a configuration of a drum type washing machine according to an exemplary embodiment of the present invention.

FIG. 2 is a perspective view showing an injection nozzle.

FIG. 3 is a block diagram of a control device.

FIG. 4 is an explanatory diagram showing the concept of how to obtain the PP value of the output waveform of the vibration detection means.

FIG. 5 is an explanatory diagram showing cleaning software when the laundry amount is calculated from the water supply amount and the tank water amount.

FIG. 6 is an explanatory diagram showing cleaning software in a case where a drum is rotationally driven at a predetermined high speed to calculate a laundry amount.

FIG. 7 is a flowchart showing an operation during a cleaning and dehydration process.

FIG. 8 is a flowchart showing an operation during a cleaning and dehydration process.

FIG. 9 is a diagram showing an output waveform of the vibration detecting means at each rotation speed.

[Explanation of symbols]

2 drums 4 rotary drive 5 injection nozzles 6 injection device 15 Horizontal axis 34 Water valve 35 water supply pipe 39 Control device 42 Control circuit S Laundry (workpiece)

Claims (4)

(57) [Claims] 1. A drum that is rotatably supported about a horizontal axis and that accommodates an object to be processed, a rotation drive unit that rotates the drum, a water supply unit that supplies a washing liquid into the drum, and the drum. In a drum type washing machine provided with a circulation means for injecting the discharged liquid from the inside of the drum again into the drum, and a control means for controlling the rotation speed of the rotation driving means , the injection into the drum by the circulation means is Dora
From the front of the drum to the center of the drum, gradually angle the nozzle.
Instead, a plurality of injection ports are formed to eject, and the control unit can tumbl the rotation speed of the rotation drive unit in the drum when the object is washed with the wash water. Drum-type washing machine, wherein the number of rotations and the number of rotations of the object to be treated are alternately controlled in the drum. 2. An object-to-be-processed amount detecting means for detecting the amount of the object-to-be-processed is provided, and the control means controls the rotation speed of the rotation driving means based on an output from the object-to-be-processed amount detecting means. The drum type washing machine according to claim 1, wherein: 3. An unbalance detecting means for detecting the deviation of the object to be processed in the drum is provided, and the control means is a rotation speed at which the object to be processed can be tumbled in the drum. Only when the output of the unbalance detection means is below a predetermined level when controlled to the upper limit of the number, the rotation speed of the rotation drive means is controlled to the rotation speed at which the object to be processed sticks in the drum. The drum type washing machine according to claim 1, wherein 4. The control means controls the rotation speed of the rotation driving means so that the rotation speed of the drum immediately before the end of cleaning is the highest during cleaning. Washing machine.