JPH046710Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of the Invention) The present invention relates to a rotation control device for changing and adjusting the rotation speed of a dehydration tank.

(Summary of the invention) This invention changes the rotation speed of the spinner tank depending on the material of the laundry placed in the spinner tank, so that laundry can be spun properly without damaging the laundry. .

(Prior art and its problems) Conventionally, in a dehydration tank such as that provided in a washing machine, the rotational speed of the drive motor of the dehydration tank is generally uniform. In the case of laundry made from fabric, there is a drawback that dehydration tends to be insufficient.

When insufficient dehydration occurs in this way, it is generally dealt with by extending the dehydration time, but this has the disadvantage that dehydration takes a long time.

Therefore, it is possible to prepare a drive motor that rotates at high speed in advance, but if the material is made of thin fabric such as silk scarves or clothes, the laundry may be damaged due to high-speed dehydration. There were flaws.

(Purpose of the invention) The present invention was developed in view of the above circumstances, and the purpose of this invention is to make it possible to dehydrate the laundry effectively without damaging the laundry, depending on the material of the laundry. do.

(Structure and effects of the invention) In order to achieve the above purpose, the invention has the following features:
a material setting means for setting the material of the laundry placed in the dehydration tank; a weight detection means for detecting the weight of the laundry placed in the dehydration tank; and a material of the laundry based on the material setting by the material setting means. , a rotational speed control means for calculating a rotational speed according to the laundry based on the weight signal from the weight detection means and outputting a rotational speed control signal, and the dehydration tank in response to the rotational speed control signal. The apparatus includes a motor speed change means for changing the drive rotational speed of the drive motor, and a timer for setting the drive time of the drive motor.

According to this configuration, when the laundry is put into the spin-drying tank, the rotation speed is calculated according to the material and weight by setting the material of the laundry and detecting the weight. Dehydration can be performed at a drive rotation speed that is appropriate for the material and weight.

Therefore, in the case of laundry made of thin fabrics that are easily damaged by dehydration, such as silk scarves and clothes, the dehydration tank is rotated at a low speed, so the dehydration takes time. Now you can set the dehydration time using a timer to prevent fabric damage.

On the other hand, when dehydrating a large amount of laundry made of thick fabrics that hardly suffer damage due to dehydration, such as zatsuku shoes or jeans, the dehydration tank is driven and rotated at high speed, so the dehydration can be completed in a short time. It is now possible to shorten the dehydration time by setting the dehydration time using a timer.

In other words, for perishable laundry, it is possible to take a long time to spin the laundry to prevent damage to the laundry, and for laundry made of thick fabric, the spin-drying time can be shortened. I am now able to do it well.

(Description of Embodiments) Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. Fig. 1 is a circuit block diagram of a rotation control device for a dehydration tank according to an embodiment of the present invention, Fig. 2 is an overall schematic sectional view of a washing machine, and Fig. 3 is an enlarged sectional view of the main parts of Fig. 2. be. Reference numeral 1 denotes a dehydration tank which also serves as a washing tub, and 2 a pressure sensitive means for detecting the weight of the laundry placed in the dehydration tank 1 and outputting a weight signal corresponding to the detected weight. It is element. Reference numeral 3 denotes a material setting means for setting the material of the laundry put into the dehydration tank 1; 4, in response to the weight signal, the speed increases as the weight of the laundry increases; It is a rotational speed control means that calculates a rotational speed according to the material of the laundry based on the material setting and outputs a rotational speed control signal. Reference numeral 5 denotes a motor drive section as a motor speed change means for changing the drive rotation speed of the electric drive motor M of the dehydration tank 1 in response to the rotation speed control signal. In this motor drive section 5,
By changing the voltage applied to the electric drive motor M,
Its rotation speed can be changed.

At the bottom of the dehydration tank 1, there is a cylindrical hollow rotating shaft 6.
The hollow rotating shaft 6 is rotatably provided in the water receiving tank 7 by penetrating its bottom. A rotary shaft 8 is provided rotatably through the hollow rotary shaft 6, a pulsator 9 is rotatably attached to the upper end of the rotary shaft 8, and a transmission pulley 10 is attached to the lower end of the rotary shaft 8. It is configured such that the power from the electric drive motor M is transmitted via the belt type transmission mechanism 11.

The rotating shaft 8 and the hollow rotating shaft 6 are interlocked and connected via a clutch mechanism 12 (known clutch spring) and a braking mechanism 13.
By this action, the washing machine is configured to be able to switch between a state where only the rotary shaft 8 is driven and rotated to perform washing, and a state where both the rotary shaft 8 and the hollow rotary shaft 6 are driven and rotated to perform dehydration.

The dehydration tank 1 has a different diameter portion 14 having an oval cross-sectional shape formed with a notch in the upper part of the hollow rotating shaft 6.
It is mounted so that it can be slightly displaced only in the vertical direction, and on the hollow rotating shaft 6 side, the bottom of the dehydration tank 1 is
The pressure sensitive element 2 installed on the bottom surface of the water receiving tank 7
is received and supported via a ball bearing 15. 16 is a nut serving as a stopper for preventing upward movement of the dehydration tank 1;
7 is a ball bearing provided between the water tank 7 and the outer peripheral surface of the hollow rotating shaft 6, and 18 is a bearing bushing provided between the hollow rotating shaft 6 and the rotating shaft 8. 19 is a sealing member between the hollow rotating shaft 6 and the rotating shaft 8, and 20 is a bellows for sealing between the hollow rotating shaft 6 and the dehydration tank 1.

Reference numeral 21 denotes an annular sealing member for the pressure sensitive element 2 and the ball bearing 15, which is attached and held by the first cylindrical body 22 attached to the water receiving tank 7, and the inner circumferential edge of the sealing member 21 is connected to the dehydrating tank. The second cylindrical body 23 is pressed against the outer circumferential surface of the second cylindrical body 23 attached to the second cylindrical body 23 .

24 is a start switch, 25 is a washing timer for setting washing time, both of which are attached to the outer frame 2 of the washing machine.
6 is attached to the upper panel 27.

Although not shown, this panel 27 is provided with a rotary knob for switching between washing and dehydration, and a rotary knob for setting the material of the material setting means 3.

28 is a water injection valve, and 29 is a drain valve installed in a drain pipe 30 connected to the water receiving tank 7.

In FIG. 1, numeral 31 is a motor timer for setting the drive time of the electric drive motor M.

Reference numeral 32 denotes a memory consisting of a rotation speed memory 32a for the dehydration tank 1 and a laundry material setting memory 32b. As shown in the memory configuration diagram of FIG.
A<B<C<D<E) is set and stored in advance. Each of the driving rotational speeds A, B, C, D, and E is appropriately set according to the size of the dehydration tank 1. Further, the material setting memory 32b
As shown in the memory configuration diagram of FIG. 4b, the materials are classified into synthetic fibers, cotton, silk, shoes/others, etc., and coefficients are assigned according to the respective materials.

Next, the operation of this embodiment will be explained using the flowchart shown in FIG.

It is determined whether the starting switch is turned on (N1), and as the starting switch is turned on, pressure sensing data from the pressure sensing element 2 as the weight detection means,
That is, the weight of the laundry put into the dehydration tank 1 is read into the rotation speed control means 3 (N2), and
The rotational speed corresponding to the pressure sensitive data is read from the rotational speed memory 32a (N3).

Thereafter, the coefficient corresponding to the material of the laundry set by the material setting means 3 is stored in the material setting memory 32.
The rotational speed is read from step N4 (N4), and the rotational speed read at step N3 is multiplied by the coefficient read at step N4 to calculate the rotational speed (N5).

Next, a rotation speed corresponding to the rotation speed determined in step N5 is set for the motor drive unit 4 (N6), and a voltage corresponding to the rotation speed is applied to the electric drive motor M. . Next, the user sets the motor driving time, that is, the dewatering time, in the motor timer 31. It is best to set the dehydration time to a long time if the laundry is perishable, or to a short time if the laundry is made of thick fabric.

Then, the motor timer 31 is started (N7), and the electric drive motor M is transferred from the motor drive section 4.
Outputs the drive signal to (N8).

Thereafter, it is determined whether the motor timer 31 has timed up, that is, whether the driving time of the dehydration tank 1 has reached the set time (N9). When the set time is reached, the drive signal output from the motor drive section 4 to the electric drive motor M is stopped (N10),
Complete a series of dehydration processes.

Three or four pressure sensitive elements 2 are provided outside the hollow rotating shaft 6 at predetermined intervals in the circumferential direction, and their detected weights are added together, and the weight calculated by the addition is added to the weight. It is configured to detect the weight of the laundry by multiplying it by a predetermined coefficient and taking into account the weight of the laundry received by the pulsator 9.

As a means for detecting the weight of the laundry, for example, the hollow rotating shaft 6 may be elastically connected at a midway point by spline fitting, and the ball bearing 15 may be received by an elastic body such as a rubber material. The laundry weight may be detected by supporting the water tank 7 and detecting the amount of expansion and contraction of the hollow rotating shaft 6. Further, the rotating shaft 8 is similarly configured to be able to expand and contract within a predetermined range by spline fitting, and by detecting the amount of expansion and contraction, the pulsator 9
The weight of the laundry may also be detected, and the total weight of the laundry may be determined by summing the weight of the laundry.

The present invention is not limited to a single-tank type washing machine having a dehydration tank 1 that also serves as a washing tank as in the above embodiment.
It can also be applied to washing machines with a separate dehydration tank or to those with an independent dehydration tank.

As a motor speed change means for changing the rotational speed of the electric drive motor M, for example, the transmission pulley 10 is configured with a split pulley, and the split pulley is moved toward and away from the rotational axis direction, and the winding diameter of the belt is changed. Various configurations are adopted, such as a configuration in which the speed can be changed steplessly, or a configuration in which a gear type transmission mechanism is interposed between the drive motor M and the belt type transmission mechanism 11 to change the speed in stages. can.

[Brief explanation of drawings]

Fig. 1 is a circuit block diagram of a rotation control device for a dehydration tank according to an embodiment of the present invention, Fig. 2 is a schematic vertical sectional view of the entire washing machine, and Fig. 3 is an enlarged sectional view of the main parts of Fig. 2. , FIG. 4 is a memory configuration diagram, and FIG. 5 is a flowchart. DESCRIPTION OF SYMBOLS 1...Dehydration tank, 2...Pressure sensing element as weight detection means, 3...Material setting means, 4...Rotational speed control means, 5...Motor drive section as motor speed change means, M...Drive motor .

Claims (1)

[Scope of Claim for Utility Model Registration] Material setting means 3 for setting the material of the laundry placed in the dehydration tank 1; Weight detection means 2 for detecting the weight of the laundry placed in the dehydration tank 1; Rotational speed control means that calculates a rotational speed according to the laundry based on the material of the laundry based on the material setting by the material setting means 3 and the weight signal from the weight detection means 2 and outputs a rotational speed control signal. 4, the dehydration tank 1 in response to the rotational speed control signal;
A dewatering device comprising: a motor speed change means 5 for changing the drive rotational speed of the drive motor M; and a timer 31 for setting the drive time of the drive motor M.