JP2000014973A - Electric washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure and improve the dehydrating performance by starting a driving motor in a minor-pole winding constitution in the initial stage of dehydration process, accelerating it in a majority-pole winding constitution, and then switching it to the minority-pole winding constitution. SOLUTION: In dehydration process, a driving motor 9 is gently started with the driving characteristic of 2-pole constitution having small generating torque, accelerated in 6-pole constitution, and then switched again to the 2-pole constitution to rotate at high speed. For the pole changing of the driving motor 9, this electric washing machine is provided with a FLS circuit 15g consisting of FLS (semiconductor alternating switching elements) 15g1, 15g2 for normal rotation feed control and reverse rotation feed control. A switching relay 15f is controlled, and FLS 15g1 is on to feed electricity to a main winding 9c for 6-pole constitution, whereby dehydration is started in normal rotating direction. The switching relay 15f is controlled to feed electricity to a main winding 9e for 2-pole constitution, whereby a high-speed dehydration driving is performed in normal rotating direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic electric washing machine, and more particularly to simplification of the structure and improvement of safety.

[0002]

2. Description of the Related Art Generally, a fully automatic electric washing machine has a driving mechanism unitized so as to incorporate a reduction gear, a friction clutch and a friction brake, and is fixed to the outside of a bottom wall of a water receiving outer tub by screws. Thereby, this bottom wall is penetrated in a watertight state, and a concentric double output shaft is projected from the bottom of the outer tub. A washing and dewatering tub is attached to an upper end of a dehydration shaft outside the concentric double output shaft. And a stirring blade attached to the upper end of the washing shaft. The input side of the drive mechanism is connected to a drive motor via a pulley and a belt, and receives a rotational drive force from the drive motor.

[0003] In the washing (washing and rinsing) process, the drive mechanism portion applies a frictional braking force to a spinning shaft by a friction brake to put the washing and dewatering tub in a stationary state and corrects the stirring blade at a low speed. In the dewatering process, the linkage between the input shaft and the concentric double output shaft is switched so that the friction brake is released and the washing and dewatering tub and the stirring blade are rotated at a high speed together in the dewatering process. When the lid is opened, the friction brake functions so as to generate a friction braking force for stopping the washing and dewatering tub.

[0004] The fully automatic electric washing machine further includes a water supply solenoid valve,
The system includes a drain electromagnetic valve, a lid opening / closing sensor, a water level sensor, a motor drive circuit, an electromagnetic valve drive circuit, an operation panel including an input switch, an indicator lamp, and a notification buzzer, and a control device for controlling these.

The control device is mainly composed of a microcomputer, and sets a washing and dehydration course in accordance with an instruction input from an input switch on an operation panel, and sets the set washing and dehydration according to a preset control program. Execute the process of the process. In the processing of the washing and dewatering processes, the solenoid valve is controlled to supply and drain water to and from the outer tub, the drive motor and the drive mechanism are controlled to rotate and brake the washing and dewatering tub and the stirring blade, and the display lamp is controlled. The progress status of each process is notified by controlling the buzzer and the buzzer.

[0006]

The structure of such a fully automatic electric washing machine has been complicated due to improvements in washing and dehydration performance, diversification of washing and dehydration functions, and improvement in safety. , Is getting expensive.

An object of the present invention is to provide an electric washing machine having a simplified configuration.

Another object of the present invention is to provide an electric washing machine having a simple structure and high safety.

It is still another object of the present invention to provide an electric washing machine having a simple structure and excellent dehydration performance.

[0010]

SUMMARY OF THE INVENTION The present invention relates to an electric washing machine using a pole-conversion type single-phase induction motor as a drive motor for driving a washing and spin-drying tub. Starting with a number of windings, then accelerating with a winding with a large number of poles, and then switching back to a winding with a small number of poles to perform high-speed dehydration drive. .

After the high-speed spin-drying operation is completed, the electric motor is electrically braked by the driving motor to decelerate.

[0012]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a vertical side view of a fully automatic electric washing machine showing one embodiment of the present invention. FIG. 2 is a bottom view showing a state in which components are installed outside the bottom wall of the outer tub in the fully automatic electric washing machine. FIG. 3 is a bottom view of the outer tub in the fully automatic electric washing machine. FIG. 4 is a partial longitudinal side view of the outer tub in the fully automatic electric washing machine. FIG.
FIG. 2 is a longitudinal sectional side view showing a clutch / rotation prevention device in the fully automatic electric washing machine and a partially developed view. FIG. 6 is a vertical sectional side view of a part of the clutch / rotation prevention device in the fully automatic electric washing machine, and FIG. 7 is a bottom view thereof. FIG. 8 is a vertical sectional side view showing the operation of the detent function (washing drive) of the clutch / detent device in the fully automatic electric washing machine, and FIG. 9 is a vertical side view showing the operation of the clutch connection function (dehydration drive). It is.

A water receiving outer tank 1 formed by molding a synthetic resin such as polypropylene is provided with a plurality of suspension rods 3, a buffer spring 4, a damper, and the like in an outer frame 2 made of a steel plate having a substantially rectangular cylindrical shape. Support vibration isolation. The outer frame 2 is designed so that the required rigidity can be obtained with a thin steel plate by making the side wall round. On the side wall of the outer tub 1, an engaging rib 1 a for engaging the suspension rod 3 via a vibration-proof spring 4 is integrally provided.

In the outer tub 1, a cylindrical washing and dewatering tub 5 having a bottom and made of a synthetic resin such as stainless steel or polypropylene is rotatably provided.

The washing and dewatering tub 5 has a fluid balance ring 5a on the upper edge thereof, a number of dehydration holes 5b on the side wall, and a flange 5c on the bottom. At the bottom center of the washing and dewatering tub 5, a large stirring blade 6 formed of a synthetic resin such as polypropylene is rotatably installed.

The installation of the washing and dewatering tub 5 with respect to the outer tub 1 and the installation of the stirring blade 6 in the washing and dewatering tub 5 are performed by using a meshing clutch / insert-molded so as to penetrate the bottom wall of the outer tub 1. This is realized by the dehydrating shaft and the washing shaft of the rotation preventing device 7.

Mesh type clutch / rotation prevention device 7
Is a combination of a clutch device for intermittently transmitting the driving force to the washing and dewatering tub 5 and a device for preventing the washing and dewatering tub 5 from rotating during washing, and is insert-molded so as to penetrate the bottom wall of the outer tub 1. It has a cylindrical housing 7a that provides a surface. Bearings 7b,
The hollow dewatering shaft 7e, which is supported in a watertight state by the water seal 7c and the water seal 7d, further supports the washing shaft 7f in a watertight state so as to penetrate the inside thereof to form a concentric double shaft. The housing 7a is provided at its lower edge with a rotation preventing unevenness 7g for locking the dewatering shaft 7e. The dewatering shaft 7e is provided at its upper end with a boss 7h for fitting and connecting the flange 5c of the washing and dewatering tub 5, and at the lower end thereof, a slider 7i is axially slidable on its outer periphery. A spline 7j for movably engaging is provided. This clutch / rotation prevention device 7
Is formed by insert molding such that the housing 7a penetrates the bottom wall of the outer tank 1 in this assembled state at the time of forming the outer tank. From the viewpoint of facilitating the subsequent component assembling work, it is preferable to insert-mold the bearing 7b, 7c at least in a partially assembled state in which the housing 7a is press-fitted.

The washing shaft 7f is fitted with a stirring blade 6 at the upper end thereof and connected thereto, and a pulley 7k is fitted at the lower end thereof and connected thereto.

The pulley 7k has an engaging hole 7m facing the slider 7i.

The slider 7i has, at its upper end, a detent unevenness 7g formed on the lower edge of the housing 7a when raised.
The lower end is provided with an upper concave / convex portion 7n which is disengaged from the detent unevenness 7g when it is lowered. A lower projection 7p detached from the engagement hole 7m is provided. The slider 7i is axially slidably engaged with a spline 7j formed on the dehydrating shaft 7e, and is lowered by a spring 7q housed in a compressed state between the inner ring of the bearing 7c and the slider 7i. The operation lever supported on the bottom wall of the outer tub 1 by rotating the dehydrating shaft 7e integrally with the washing shaft 7f by being disengaged from the rotation preventing unevenness 7g and engaging with the engaging hole 7m. By pushing up by 7r, it is slid to the ascending state, detaches from the engaging hole 7m, and engages with the detent unevenness 7g, thereby dehydrating the shaft 7e.
To stop. In a state in which the slider 7i is being lifted and lowered, the slider 7i assumes a free state in which it is detached from both the rotation preventing unevenness 7g and the engagement hole 7m.

In this embodiment, the engagement of the slider 7i slidable in the axial direction with the dehydrating shaft 7e has a spline engagement structure. However, relative rotation such as a sliding key or serration engagement is used. Other engagement means may be used to allow axial sliding while preventing movement.

At the upper end of the outer tub 1, a tub cover 1b made of a synthetic resin is provided to prevent the laundry from dropping into the gap between the outer tub 1 and the washing and dewatering tub 5.

Outside the bottom wall of the outer tub 1, the outer tub 1
A tall radially and annular reinforcing rib 1c integrally formed to increase the rigidity of the tire and maintain its original shape, a driving motor mounting seat 1d, and an operation lever mounting seat 1e;
Drain valve mounting seat 1f and drive lever mounting seat 1g
Is provided. Particularly, in order to insert the housing 7a of the clutch / rotation prevention device 7 firmly into the bottom wall of the outer tub 1 vertically and in a watertight state and to put it into practical use, shrinkage due to hardening during molding and deformation due to load are reduced. It is necessary to.
Therefore, the radial and annular reinforcing ribs 1c are evenly arranged from the cylindrical housing molded portion formed so as to cover the periphery of the housing 7a to uniformly disperse the stress due to shrinkage and load, and locally concentrate deformation. Should not occur. For this, the reinforcing ribs 1c which extend radially from the molded tubular housing forming part 1c ₁ so as to cover the periphery of the housing 7a, by surrounding the intermediate annular portion 1c _2, a housing forming part 1c ₁ The generation of non-uniform stress such as falling down is prevented. Reinforcing rib 1
c is an outer tank 1 is formed on the outside of the intermediate annular portion 1c ₂
Is of course reinforced.

The drive motor mounting seat 1d, the operating lever mounting seat 1e, the drain valve mounting seat 1f, and the drive lever mounting seat 1g are at least partially formed integrally with the reinforcing rib 1c. Alternatively, they are integrally formed so as to be connected to the reinforcing rib 1c.

The drive motor 9 is screwed and installed on the drive motor mounting seat 1d, and the operation lever mounting seat 1e is mounted.
, One end of the operation lever 7r is engaged and supported so as to be freely rotatable in the vertical direction, and the drainage electric valve device 10 is screwed and installed on the drainage valve mounting seat 1f.
, The drive lever 10b is screwed so as to freely turn in the horizontal direction.

The output shaft 9a of the drive motor 9 is connected to a pulley 9b
And the belt 11 and the pulley 7k.

The electric drainage valve device 10 is provided with a drain port 1 of the outer tank 1.
h, a drain valve 10a for opening and closing a drain passage to a drain pipe 10f, a drain valve open / close detection switch for detecting the open / close state of the drain valve 10a (to be described in detail later), and a free end of the operation lever 7r. It includes the drive lever 10b installed to drive the unit up and down, and a valve drive motor 10d that drives these via a cam 10c. The drain valve “closed” by turning the drive lever 10b in rotation in conjunction with the opening and closing operation of the drain valve 10a by the valve drive motor 10d.
Then, the operation lever 7r is pushed up and the slide collar 7 is pushed.
The upper unevenness 7p of i is fixed to the rotation preventing unevenness 7g of the housing 7a.
When the drain valve is "open", the operation lever 7r is released to lower the slide collar 7i by the extension force of the spring 7q, thereby lowering the lower protrusion 7p to the pulley 7k.
Is engaged with the engaging hole 7m. The push-up / release of the operation lever 7r can be performed by operating the operator 10 provided at the end of the drive lever 10b so as to be elastically retractable by a spring force.
This is realized by causing the inclined surface of e to act on the free end of the operation lever 7r. Drain valve 1 by valve drive motor 10d
The drive of the drive lever 10a and the drive lever 10b can be modified to drive by an electromagnetic plunger.

When a large reaction force is applied to the inclined surface, the operating element 10e is turned against the spring force so as to retract the inclined surface and releases the drive lever 10 so as to release the reaction force.
b. This large reaction force prevents the upper unevenness 7n of the slider 7i from fitting into the rotation preventing unevenness 7g of the housing 7a when the operating lever 7r is pushed up by the inclined surface of the operator 10e to raise the slider 7i. This occurs when the slider 7i is stopped from rising due to a collision. The valve drive motor 10d rotates the cam 10c so as to fully open the drain valve 10a even when the slider 7i is prevented from rising halfway due to the collision of the unevenness, and the driving lever 10b that is interlocked is also forced. Is turned. Then, the turning angle of the drive lever 10b after the lifting of the slider 7i is stopped is controlled by moving the operating element 1 so that the inclined surface is retracted.
By elastically turning 0e, it is realized while avoiding generation of a large stress that may damage the interlocking member. Each spring force is set so that the turning angle of the operation element 10e that retreats the inclined surface is not generated by the extension force of the spring 7q acting to lower the operation lever 7r.

When the slider 7i is lifted, the upper unevenness 7n does not fit into the rotation preventing unevenness 7g of the housing 7a, and a collision state occurs. The problem is solved by slightly moving 7f in one rotation direction. Since the washing and dewatering tub 5 and the stirring blade 6 are in a frictional connection state through the laundry and the washing water, the washing shaft 7
When f is rotated, the washing and dewatering tub 5 slowly rotates. Accordingly, the positioning is realized such that the upper unevenness 7n of the slider 7i is engaged with the rotation preventing unevenness 7g of the housing 7a.

Top cover 12 installed on the upper end of outer frame 1
, A clothing inlet 12a is opened, a water supply solenoid valve 13 is installed inside the back, and a water level sensor 1 is installed inside the front.
4, a controller 15 with a built-in buzzer, an operation panel 16, and a lid lock / shake detection unit are installed. The electric components are covered with protective covers 12 b and 12 c to be waterproof, and the electric components are turned to the clothing inlet 12 a. Then, a lid 17 for opening and closing the clothing inlet 12a is installed.

FIGS. 10 and 11 are longitudinal side views of the mechanism of the lid lock / shake detection unit in the fully automatic electric washing machine. FIG. 10 shows a state where the lid lock is released, and FIG. The lid lock state is shown.

The lid lock / shake detection unit 18 is a cover 1
7, a function for detecting the open / closed state of the cover 17, and a shake amount detecting function for detecting the amplitude of the swing of the outer tub 1 (the swirling of the washing and dewatering tub 5). It is a unit that combines means. The lid lock / release function means always locks the closed lid 17 to prevent the lid from opening, confirms the safety state in response to the lid opening instruction, releases the lock after controlling the safety state, and releases the lid. 17 is linked to the control device to open.

The lid 17 has a lock claw engaging portion 17a at its tip.

The lid lock / shake detection unit 18
Is pushed by the lock claw engaging portion 17a of the closed lid 17 to be turned and engaged with the lock claw engaging portion 17a.
The lock claw member 18a that locks the lock so that it cannot be opened, reverses the lock and releases the lock, and transmits the state to a detection switch (described later), and the lock that turns and engages (locks) with the lock claw engagement portion 17a An electromagnetic device 18c provided with a plunger 18b which is pushed by a spring so as to prevent the inversion (release) of the claw member 18a and is pulled back by an electromagnetic force to enable the inversion (release) of the lock claw member 18a; A swing detection lever (18d) that hangs down to a position slightly away from the suspension position of the outer tub (1) in the normal rotation state of the dewatering tub (5) and operates the detection switch in response to excessive swing of the outer tub (1). . The detection switch is a dual-purpose type including a contact that is opened when the lid is unlocked and when the runout of the outer tub 1 increases.

The drive motor 9 uses a capacitor-separated single-phase induction motor of a 2-pole / 6-pole switching type. In this fully automatic electric washing machine, it is necessary to rotate the stirring blade 6 forward and backward at a low speed in the washing process, and to rotate the washing and dewatering tub 5 in one direction at a high speed in the dewatering process. A conventional fully automatic electric washing machine generally obtains the driving force of these two types of rotation speeds by using a reduction gear of a drive mechanism, but in this embodiment, the reduction gear is In order to abolish and simplify the configuration of the drive mechanism, the drive mechanism 9 is obtained by switching the number of poles.

As shown in FIG. 12, the output characteristic 121 of the 6-pole configuration of the two-pole / 6-pole switching type capacitor-separated single-phase induction motor has a high torque and a low speed rotation. It is suitable for the driving force of the washing process in which the is rotated forward and backward at a low speed. The output characteristics 122 of the two-pole configuration
Is low in torque but rotates at high speed, so that it is suitable for a driving force in a spinning step in which the washing and spinning tub 5 is rotated at high speed in one direction. However, since it is necessary to accelerate with a relatively large driving torque at the time of starting dehydration, using a capacitor-phased single-phase induction motor that can obtain this large driving torque in a two-pole configuration state is required. The structure becomes large and uneconomical. Therefore, the drive motor 9 is configured such that the drive torque for realizing strong acceleration at the time of dehydration start can be obtained in a six-pole configuration state. As shown in FIG. The operation is performed with the driving characteristics 131 having a six-pole configuration, and thereafter, the driving characteristics are switched to the two-pole configuration to realize the driving characteristics 132 of the high-speed spinning rotation. t1 is a power supply suspension time for switching the number of poles.

Such a two-pole / 6-pole switching type capacitor-separated single-phase induction motor is provided with two types of windings, one for a two-pole configuration and the other for a six-pole configuration. By selectively using a changeover switch, a two-pole configuration and a six-pole configuration are realized. The capacitors for phase separation are connected so that one capacitor is commonly used for the two-pole configuration and the six-pole configuration.

In this type of fully automatic electric washing machine, the rotation speed of the stirring blade 6 in the washing process is desirably 350 rpm or less, and the rotation speed of the washing and dewatering tub 5 in the spinning process is 700 to 1000 rpm. It is desirable. In order to realize such a rotation speed in a power supply region of 50 to 60 Hz by a 2-pole / 6-pole switching type capacitor-phased single-phase induction motor, the washing shaft 7f
And the pulley 9k connected to the output shaft 9a of the drive motor 9 is made different in diameter from the pulley 7k. The reduction ratio (pulley ratio) at this time is preferably 1/3 to 1/4.

Such a drive rotation speed can be reduced by 1 / using a 4/6 pole switching type capacitor-separated single-phase induction motor.
It can also be realized with a reduction ratio of 1.5 to 1/2. However, in terms of cost, a 2 / 6-pole switching type capacitor split-phase single-phase induction motor is advantageous.

FIG. 14 is a plan view of the operation panel 16. The operation panel 16 includes a membrane switch and an LE.
A combination of a D indicator light, a pair of a water amount key 16a for setting the amount of washing water and its indicator light group 16b, a pair of a reservation key 16c for setting a reservation time and its indicator light 16d, and a washing dehydration process are selected. Travel key 16e and its indicator lights 1
6f, a pair of a course key group 16g for selectively setting a washing course and its indicator lamp group 16h, and a power key 16i.
And a pair 56 of a lid open key 16j for instructing opening of the lid 17 and a confirmation indicator light 16k. 16 g of causal
Is also used for selecting a washing course and inputting a start / pause instruction.

FIG. 15 is a block diagram showing an electric configuration of the fully automatic electric washing machine.

The controller 15 is constructed around a microcomputer 15a, and includes a power supply circuit 15b, a zero-cross signal generation circuit 15c, a reset circuit 15d,
A power supply relay 15e, a 2/6 pole switching relay 15f of the drive motor 9, a water supply solenoid valve 13, and a drainage electric valve device 10
A circuit 15g comprising a semiconductor AC switching element (FLS) group for controlling power supply to the electromagnetic device 18c of the cover lock / shake detection unit 18 and the drive motor 9, a cloth sensor circuit 15h, and a clock signal are generated. An oscillation circuit 15i, a buzzer 15j, and a model changeover switch 15k for setting control characteristics according to the model are provided.

The drive motor 9 has a main winding 9c for a six-pole configuration.
And an auxiliary winding 9d, and a main winding 9e and an auxiliary winding 9f for a two-pole configuration. The 2/6 pole switching relay 15f is FL
There is a normally closed switching contact on the six-pole configuration side for selectively supplying power from the S circuit 15g to the six-pole configuration windings 9c and 9d or the two-pole configuration windings 9e and 9f.

The FLS circuit 15g controls the power supply to the drive motor 9 by two FLSs 15g ₁ and 15g _2.
Is provided. FLS15g1 a semiconductor alternating switching elements in the forward rotational power feeding control, FLS15g ₂ is a semiconductor ac switching element of the reverse rotation feeding control.

The electric drainage valve device 10 includes drainage valve opening / closing detection switches 10g and 10h that operate as limit switches for driving the valve body opening / closing. The drain valve on / off detection switch 10g is a normally closed contact that opens when the drain valve 10a is fully opened, and the drain valve on / off detection switch 10h is a normally closed contact that opens when the drain valve 10a is fully closed.

As described above, the lid lock / shake detection unit 18 includes the lock claw member 18a and the shake detection lever 1.
A detection switch 18e operated by 8d is provided.

The phase dividing capacitor 19 is connected to the FLS circuit 15g
And the switching relay 15f to be shared with a 2 / 6-pole circuit configuration.

Regarding the operation panel 16, various key groups are denoted by reference numeral 16z, and LED indicator lamp groups are denoted by reference numeral 16y.

Next, control of washing / dehydrating and lid locking / releasing by the microcomputer 15a will be described.

In the washing process, the water supply solenoid valve 13 is controlled so as to supply water up to the set water amount (water level) set by the water amount key 16a. In general, the water level at this time decreases due to the washing water seeping into the clothes during the subsequent washing and rinsing. Since the lowering of the water level is accompanied by a tendency to lower the washing performance, the control device of the conventional fully automatic electric washing machine performs a uniform supply of make-up water to compensate for the lowering of the water level regardless of the set water amount. This tends to increase the water consumption and increase the washing time. However,
As shown in FIG. 16, the amount of decrease in the water level differs depending on the washing load (cloth amount), and the decrease in the water level in a light load state is very small. Therefore, even if the replenishing water is supplied uniformly, a substantial improvement effect may not be obtained.

Accordingly, the microcomputer 15 in the controller 15 of the fully automatic electric washing machine of this embodiment
a indicates water supply (step 1701) as shown in FIG.
After checking the set water level (Step 1702),
When the high water level is not set, washing is performed without supplementary water, and rinsing and stirring are executed (step 1710).

When the high water level is set, the cloth amount sensor circuit 1
The laundry amount to be washed is detected by 5h (step 170).
3) The detected cloth amount is rated or 80 with respect to the set water amount.
It is determined whether it is not less than% (Step 1704). If it is less than 0%, the washing and rinsing of Step 1710 are executed. And when it is 80% or more, wash for t2 seconds,
After the rinsing, whether the water level is at the set water level is confirmed by the output signal of the water level sensor 14 (Steps 1705, 1
706, 1707), if it is at the set water level, step 17
Perform 10 wash and rinse agitation. If it is not at the set water level, make-up water up to the set water level (steps 1708 and 17
After the execution of step 09), the flow proceeds to the washing and rinsing of step 1710.

Incidentally, the forward / reverse rotation driving of the stirring blade 6 in the washing process is performed by rotating the drive motor 9 forward / reverse in a six-pole configuration by alternately conducting the FLS 15g ₁ and 15g ₂ .

In the dehydration process, the drive motor 9 is started and accelerated in a six-pole configuration as shown in FIG.
Switch to the pole configuration to achieve high-speed dehydration drive. For this purpose, as shown in FIG. 18, when the microcomputer 15a controls the drainage electric valve device 10 to finish draining (step 1801), the microcomputer 15a starts a dehydration operation (step 1802).

First, the switching relay 15f is controlled so that the drive motor 9 has a six-pole configuration while the FLSs 15g ₁ and 15g ₂ are kept off, and then the FLS 15g ₁ is turned on to activate the six-pole main winding. 9c and the auxiliary winding 9d
Is supplied via a phase-separating capacitor 19 to
Dehydration is started in the forward rotation direction (step 1803). The low-speed dehydration drive in the six-pole configuration is continued for t3 seconds while monitoring the excessive amount of shake or the dehydration stop instruction by the pause key (steps 1804 and 1805).

[0057] Then, the drive motor 9 the relay 15f controlled by switching after the FLS15g ₁ off state 2
Switch to the pole configuration and then again to the FLS15
The g ₁ are turned on to supply power to the main winding 9e of 2 pole configuration, the auxiliary winding 9f by feeding through a phase separation condenser 18, in the normal rotation direction performing a high speed dehydration drive (step 1806) . The high-speed dehydration operation in the two-pole configuration is continued for t4 seconds while monitoring the excessive swing amount or the dehydration stop instruction by the pause key, and the dehydration is completed (step 180).
7, 1808).

When a dehydration stop instruction is issued in steps 1804 and 1807, the drive motor 9 is made to function as an electric braking means to stop the dehydration rotation (step 180).
9) If a restart instruction is input, step 1802
If not, the flow branches to end the dewatering process (step 1810).

In such a dehydration process, if the drive motor 9 is started with a six-pole configuration when the load is light (the amount of cloth is small), the drive torque becomes excessive and the washing and dewatering tub 5 is rapidly accelerated. As a result, the amount of whirling of the washing and dewatering tub 5 increases, and accordingly, the amount of wobbling of the outer tub 1 increases, and the detection switch 18e operates to increase the chance of issuing a dehydration stop instruction. Therefore, when the load is light, FIG.
As shown in FIG. 9, the engine is started gently with the drive characteristic 191 of the two-pole configuration having a small generated torque, and then accelerates greatly with the drive characteristic 192 of the six-pole configuration. By controlling the switching of the drive motor 9 so as to perform high-speed dehydration driving, a dehydration process with a smooth and high dehydration rate can be realized. It is convenient to perform this switching control by time management. For example, gently starting the drive motor 9 in a two-pole configuration is performed for 3 to 10 seconds, and subsequent strong acceleration in a six-pole configuration is performed for 15 to 30 seconds. The dehydration drive may be performed for a predetermined time. If a tachometer for detecting the rotation speed of the drive motor 9 is provided and the switching control is performed while measuring the actual rotation speed, the control accuracy is improved.

[0060] In order to adjust the acceleration, if necessary, may be to intermittently supply power to the drive motor 9 intermittently conducting the allowed by the zero cross control FLS18g _1.

Further, by changing the spinning speed characteristic in the spinning cycle in accordance with the amount of laundry and the quality of the laundry, a more favorable spinning function can be realized. For example, when dehydrating a wool product or a delicate garment, it is desirable to suppress the high-speed dehydration rotation. Therefore, the amount of the cloth and the quality of the cloth are detected, and the drive motor 9 is left in a six-pole configuration according to the detection result. Execute dehydration control to continue high-speed dehydration drive (do not use two-pole configuration) and start dehydration control with two-pole configuration and then continue high-speed dehydration drive with six-pole configuration (do not use two-pole configuration) It is good to do.

In the dewatering step, the slide collar 7i is lowered to fit the lower protrusion 7p into the engagement hole 7m of the pulley 7k in order to transmit the torque generated by the drive motor 9 to the washing and dewatering tub 5. It is necessary to keep them engaged with each other. The lowering of the slide collar 7i causes the drive lever 10b to move when the electric drain valve 10 opens the drain valve 10a.
Is released and the operating lever 7r is released to realize the extension of the spring 7q. However, when the lower projection 7p and the engaging hole 7m are displaced, the engagement (fitting) of the two is realized. Does not happen. If the dehydration drive is performed by the drive motor 9 in the unfitted state, the edges of the lower protrusion 7p and the engagement hole 7m rub against each other, causing abnormal noise while idling.

In order to prevent such an idling phenomenon from occurring, in the dehydration process, first, the drive motor 9 is driven slowly (fine movement) so that the pulley 7k is gently rotated to perform the meshing engagement position adjustment. . It is preferable that the slow drive for the meshing engagement position adjustment is performed a plurality of times in a short time of about 0.1 second by pulse-like power supply at intervals. Also, by changing the length of the power supply time,
It is preferable to obtain a slow driving that is easy to engage.

In general, shower dehydration rinsing for removing detergent that has permeated clothing is performed while water is intermittently supplied during high-speed dehydration rotation. For this reason, this shower dehydration rinsing has problems of water noise and water splash.

In this embodiment, in order to deal with this problem, as shown in FIG.
In the dehydration drive in which the operation is switched to the pole configuration and the two-pole configuration, during the low-speed drive in which the six-pole configuration is driven and during the relatively low-speed dehydration rotation in the initial stage of the high-speed dehydration drive in the two-pole configuration. By opening the water supply electromagnetic valve 13 intermittently or continuously to inject water, water noise and water splash are reduced. In order to inject the required amount of rinsing water, it is necessary to stably maintain this relatively low-speed spinning state for a relatively long period of time. For such low-speed dehydration drive, intermittent power supply control for slowing up the dehydration speed characteristic by repeating intermittent supply of power to the drive motor 9 is desirable.

The intermittent water supply is performed in synchronization with the intermittent power supply to the drive motor 9 so that water is supplied during the power supply period or water is supplied during the power cutoff period, and asynchronous water supply is performed asynchronously with the intermittent power supply. There is a water injection control method. Also in the dehydration drive control system in which power is continuously supplied to the drive motor 9 without intermittent power supply, it is needless to say that shower dehydration rinsing by intermittent water injection can be performed.

The water injection control in the shower dehydration rinsing is desirably performed in accordance with the amount of washing cloth in order to intermittently inject a predetermined amount of rinsing water in a stable and relatively low-speed spinning state. For example, if you change the amount of laundry
When it is classified as "small", it depends on the power supply frequency and the water supply capacity (water supply flow rate). T5 = 80 after switching to 6-pole operation
After the elapse of ~ 110 seconds, intermittent water injection for 3 seconds / 10 seconds pause is repeated 16 times, and when the laundry amount is "medium", the drive motor 9 is switched to the 6-pole configuration operation and then t5 = 70-9.
After elapse of 0 second, the intermittent water injection for 4 seconds / interruption for 9 seconds is repeated 12 times.
It is preferable that the intermittent water injection for 5 seconds / interruption for 3 seconds is repeated nine times after elapse of t5 = 5 to 10 seconds after switching to the operation of the pole configuration.

When the lid open key 16j is pressed, it generates a lid opening instruction signal for opening the lid 17 covering the clothing slot 12a. Microcomputer 1
In response to the lid opening instruction signal, the electromagnetic device 18 is configured to pull back the plunger 18b of the lid lock / shake detection unit 18 so that the lock claw member 18a can be inverted.
By urging c, the lid 17 is unlocked, but before that, the driving condition is checked, and according to the condition, the rotation of the washing and dewatering tub 5 is decelerated and stopped to ensure safety. Of the electric brake and its display control.

In the electric braking, the windings 9c and 9d having a six-pole (positive rotation) structure are used first in the braking from a state in which the drive motor 9 has a two-pole (positive rotation) configuration and high-speed dehydration driving is performed. To reduce the synchronous rotation speed to generate a braking torque to reduce the speed, and then to cut off the power naturally to reduce the speed, or, if necessary, the auxiliary winding used in the dehydration drive A half-wave rectified voltage, a full-wave rectified voltage, or a DC smoothed voltage is applied to 9d to generate a braking torque to perform braking.

The control for displaying the braking state is as follows.
This is performed by the blinking display of the confirmation display lamp 16k. The blinking cycle for displaying that braking is being performed is made shorter by making it shorter than the blinking cycle of the indicator light for displaying the normal washing / dehydration process. Specifically, for example, the stroke display blinks in a cycle of 900 to 1000 ms,
It is preferable that the braking state display blinks at a cycle of 700 ms. It is convenient to change the blinking cycle as the brake approaches (the lid is unlocked) so that the length of waiting time until the end can be ascertained.

The inertia rotation time from the high-speed spin-drying rotation (about 900 rpm) of the washing and spin-drying tub 5 at the rated load (4.2 kg) of this general type of fully automatic electric washing machine to the spontaneous stoppage is 50. ~ 60 seconds.

To shorten the inertial rotation time, it is effective to perform the electric braking as described above. As shown in FIG. 21, the electric braking
Is switched from a two-pole configuration operation (dehydration drive) to a six-pole configuration operation (braking operation) to reduce the synchronous rotation speed to generate a braking torque and reduce the speed. By supplying a full-wave rectified voltage or a DC smoothing voltage to the auxiliary winding, a braking torque is generated to decelerate. Half-wave rectified voltage, to generate a braking torque by supplying a full-wave rectified voltage or a DC smoothing voltage braking, from the viewpoint of simplification and braking effect of the construction unit, for zero-crossing control FLS15g ₂ of the auxiliary winding circuit side The configuration in which the obtained half-wave rectified voltage is applied to the auxiliary winding 9d of the drive motor 9 is advantageous.

In the braking in the fully automatic electric washing machine in which the drive motor 9 and the washing and dewatering tub 5 are connected to each other via a pulley via a pulley, if the braking torque of the drive motor 9 becomes excessive, slippage occurs between the belt and the pulley. A squealing noise is generated and the amount of wear increases. In addition, a large current flows through the drive motor 9 to cause overheating. Therefore, the magnitude of the braking torque generated by the drive motor 9 needs to be set in consideration of the occurrence of slip between the belt and the pulley. The occurrence of slippage between the belt and the pulley can be suppressed by increasing the contact area between the belt and the pulley, increasing the contact pressure, and increasing the friction coefficient. However, such a countermeasure is accompanied by a disadvantage that components become large and expensive.

In this embodiment, as shown in FIG. 22, first, a high-speed dehydrating drive (80) in which the drive motor 9 is operated in a two-pole configuration in order to prevent the generation of a squealing sound due to the slippage.
(Approximately 0 to 1000 rpm) is stopped (power cutoff), and for a while, the rotation speed of the washing and spin-drying tub 5 is naturally reduced to about 600 rpm by natural inertia rotation, and then operated at a low synchronous speed of a 6-pole configuration. (Braking operation), a braking torque is generated to forcibly decelerate, and then the operation in the six-pole configuration is stopped. If necessary, a half-wave rectified voltage is applied to the auxiliary winding 9d having the six-pole configuration. It is proposed to further reduce the time until the rotation is stopped by generating a braking torque by applying a full-wave rectified voltage or a DC smoothing voltage and further forcibly decelerating the rotation.

As shown in FIG. 23, the high-speed dehydrating drive in the two-pole (forward rotation) configuration is stopped, and at the same time, a half-wave rectified voltage, a full-wave rectified voltage, or By applying the smoothing voltage to generate the electric braking torque and further forcibly reducing the speed, it is possible to further reduce the time until the rotation is stopped.

Further, as shown in FIG. 24, the high-speed spin-drying operation in the two-pole configuration is stopped, and the motor is spontaneously rotated for a while and naturally decelerated. By applying a wave rectified voltage, a full-wave rectified voltage, or a DC smoothing voltage to generate an electric braking torque and further forcibly decelerate, the time until the rotation is stopped can be further reduced. .

The natural deceleration due to the inertial rotation for a while (10 to 15 seconds) after the high-speed dehydration drive with the two-pole configuration is stopped prevents the generation of excessive braking torque in the subsequent electric braking. The cooling effect during the inertial rotation lowers the temperature of the drive motor 9 and is effective in preventing overheating in the subsequent electric braking.

When the safety condition for opening the lid is confirmed in this way, the electromagnetic device 18c of the lid lock / shake detection unit 18 is urged to pull back the plunger 18b, thereby inverting the lock claw member 18a, 17 is released. Thus, the lid 17 can be opened. By applying a spring pressure to the lid 17 such that the lid 17 is slightly opened, a hop-up lid opening operation can be realized.

The control process from when the lid open key 16j is pressed to when the lid lock is released should be changed depending on the state of the washing and spin-drying tub 5 at that time. For example, when the lid / open key 16j is pressed while the washing and spin-drying tub 5 is rotating at a high speed (the drive motor 9 is driven in a two-pole configuration), and during deceleration due to natural inertial rotation. The braking characteristics should be changed between the braking when the lid open key 16j is pressed and the other braking for ensuring safety. In the electric braking, since a current of about a lock current (5 to 6 A) flows through the auxiliary windings 9c and 9f of the drive motor 9, if this electric braking is continued for a long time,
There is a risk of overheating and burning.

FIG. 25 shows the rotation speed characteristics from the high-speed dehydration rotation state of the washing and dewatering tub 5 to the spontaneous stop by the inertial rotation. In this embodiment, as shown in FIG. 26, the braking control for changing the electric braking time in accordance with the timing at which the lid open key 16j is pressed is performed in the spinning cycle having such a rotation speed characteristic.

When the drive motor 9 is configured in two poles and a lid open instruction is input from the lid open key 16j during high-speed dehydration drive (steps 2601, 602), an electric braking control process (step 2603) is executed. Is continued for 20 seconds, the lid lock is released, and the power is automatically turned off (steps 2604, 2605, and 2606).

After the high-speed dehydrating drive of the drive motor 9 is stopped, an instruction to open the lid from the lid open key 16j is input (steps 2601, 607), and the elapsed time from the stop of the drive is confirmed (step 2608), and 15 seconds. If not, the electric braking control from step 2603 is executed.

If it is not within 15 seconds, it is checked whether it is over 15 seconds and within 30 seconds (step 2609), and if so, an electric braking control process is executed (step 261).
0), and after continuing this for 15 seconds, the lid lock is released (steps 2611 and 2605).

If the condition is not satisfied for more than 15 seconds and less than 30 seconds, it is checked whether it is more than 30 seconds and less than 50 seconds (step 2612), and when this condition is satisfied, an electric braking control process is executed (step 2612). 2613) After this braking is continued for 10 seconds, the lid lock is released (steps 2614 and 2605).

If the condition within 30 seconds and within 50 seconds is not satisfied, it is checked whether or not the time has exceeded 50 seconds (step 2615).
Return to If it has exceeded, the electric braking control process is executed (step 2616), and after continuing this for 5 seconds, the lid lock is released (steps 2617 and 2605).

When there is no lid opening instruction from the lid open key 16j, the operation is decelerated by natural coasting rotation and stopped (step 2618), and after continuing this for 60 seconds, the end buzzer 15j is sounded (step 2619, 2
620) Then, the lid lock is released and the power is automatically turned off (steps 2605 and 2606).

This electric braking is realized by using the drive motor 9. As a specific embodiment, as described above, the AC sine wave voltage is applied to the main winding 9c and the auxiliary winding 9d having the six-pole configuration. And the main winding 9c having a six-pole configuration and / or
Or the auxiliary winding 9d and / or the main winding 9 in a two-pole configuration
e and / or a half-wave rectified voltage, a full-wave rectified voltage, or a DC smoothed voltage is applied to the auxiliary winding 9f. It is necessary to add a full-wave rectifier circuit and a smoothing capacitor when implementing in a mode in which a full-wave rectified voltage or a DC smoothing voltage is applied. FLS 15g ₂ for control
It is preferable to apply the half-wave rectified voltage using the auxiliary windings 9d and 9f to the auxiliary windings 9d and 9f by adjusting the half-wave rectified voltage using the power supply voltage or the phase control to cut out a part of the power supply voltage waveform.

The lid lock and the electric braking are performed in order to prevent the lid 17 covering the clothes input port 12a from being opened in a dangerous state in which the washing and spinning tub 5 is rotating at a high speed. The microcomputer 15a stores the control history and executes a control process for performing rational electric braking and lid unlocking with reference to the control history information, whereby the lid 17 can be opened in a safe state. . FIG.
7 shows an example of the control processing.

When the power is turned on by pressing the power key 16i (step 2701), the electric braking information is referred from the stored control history information. When the control history of stopping by performing the electric braking in the spin-drying process is stored, it is estimated that the washing and spin-drying tub 5 has stopped and is in a safe state, and the lid opening instruction from the lid open key 16j is issued. Upon receipt, the lid 17 is unlocked and opened (steps 2702 and 2703).

However, when the control history information is not stored, such as in the initial state, at the time of recovery from a power failure, or when the power plug is connected to or disconnected from the outlet, the safety of the washing and dewatering tub 5 is determined based on the control history information. Since it cannot be estimated, the electric brake is applied for 15 seconds, and then the lid opening instruction from the lid open key 16j is received (steps 2704, 2705, and 2703).

Then, the washing process (steps 2706 and 2706)
707), in the dehydration step (step 2708), the washing and dehydration are performed during the low-speed dehydration drive in which the drive motor 9 has a six-pole configuration or the low-speed dehydration drive in which the six-pole configuration is started after the drive motor 9 is slowly started in the two-pole configuration. When the whirling of the water tank 5 becomes excessive and the detection switch 18e is operated, the electric power is braked for 5 seconds to attenuate the wobbling, and then the process proceeds to the next processing (steps 2709, 2710, 2711).

If the detection switch 18e is not operated during the low-speed spin-drying operation, the operation shifts to the high-speed spin-drying operation of the two-pole configuration (step 2712). When the detection switch 18e is operated, the electric brake is applied for 20 seconds to attenuate the shake, and then the process proceeds to the next processing (step 271).
3, 2714, 2715). If excessive run-out of the washing and spin-drying tub 5 is not detected during the high-speed spin-drying operation, the high-speed spin-drying operation is continued and the process proceeds to the next step.

When a lid opening instruction is received from the lid opening key 16j, it is possible to estimate whether the washing and dewatering tub 5 is rotating by checking the open / close state of the drain valve 10a in the electric drain valve device 10. it can. The open / close state of the drain valve 10a can be known by checking the open / close state of the drain valve open / close detection switches 10g and 10h provided for controlling the open / close operation by the valve drive motor 10c. If the drain valve open / close detection switch 10g is "open" and the drain valve open / close detection switch 10h is "closed", the drain valve 10a is fully opened and is in a drain stroke or a dehydration stroke. If the drain valve on / off detection switch 10h is “open” and the drain valve on / off detection switch 18g is “closed”, the drain valve 10a
Is fully closed and in the washing (washing or rinsing) process. The two drainage valve open / close detection switches 10g and 10h are both abnormal when "open" is abnormal and "closed" is indeterminate (in the middle of the open / close operation).
It is.

FIG. 28 shows the drain valve 10a based on the open / close state of the drain valve open / close detection switches 10g and 10h.
4 shows a flowchart of a control process for estimating the open / closed state of the washing / dehydrating tub 5, that is, the presence or absence of rotation of the washing and spinning tub 5, and performing electric braking and lid lock release.

When a lid open instruction is input from the lid open key 16j (step 2801), the open / close state of the drain valve open / close detection switch 18g is checked (step 2802). When the drain valve open / close detection switch 18g is in the "open" state, the open / close state of the drain valve open / close detection switch 18h is checked (step 2803). Since the state where both the drain valve open / close detection switches 18g and 18h are "open" is abnormal, it is determined that the drain valve is abnormal, an error is displayed, and the power is automatically turned off (steps 2804 to 2806).
When the drain valve open / close detection switch 18h is in the "closed" state, the drain valve 10a is open (step 28).
07), it is confirmed whether or not it is a dehydration process (step 2808). Then, during the spin-drying process, the washing and spin-drying tub 5 is rotating, and the lid lock is released after performing the electric braking control process (steps 2809 and 2810) for 20 seconds (step 2811).

If it is determined in step 2808 that the washing and dehydration tub 5 is not in the draining step, the lid is immediately unlocked because the washing and dehydrating tub 5 is not rotating in the draining step (step 2808).
811).

If it is determined in step 2802 that the drain valve open / close detection switch 18g is in the "closed" state, the open / close state of the drain valve open / close detection switch 18h is checked (step 2812). If the drain valve open / close detection switch 18h is in the "open" state, the washing and dewatering tub 5 is in a safe state in which the washing and dewatering tub 5 is not rotating during the washing process in which the drain valve 10a is closed. Release (steps 2813 and 2811).

If it is determined in step 2812 that the drain valve open / close detection switch 18h is in the "closed" state, the drain valve 10a may be in the closing operation. Open / close detection switch 18
h (steps 2814 and 281)
5). Then, the drain valve open / close detection switch 18h is opened.
When the state is reached, the drain valve 10a is closed and the process shifts to the washing process, and the lid is unlocked (steps 2815 and 28).
13, 2811).

If the drain valve open / close detection switch 18h is in the "closed" state after the elapse of the operation waiting time, the drain valve 10a is in an abnormal state, an error is displayed, and the power is automatically turned off (steps 2816 to 2816). 2818).

Note that various lid lock release control processes based on the lid open instruction by operating the lid open key 16j are performed even if the power switch 16i is not operated if the power plug is connected to the power outlet. The microcomputer 15a is programmed to function.

Here, the control of the drive motor 9 in the dewatering process will be described. The drive motor 9 used in this embodiment basically starts up in a 6-pole configuration with a large generated torque and drives at a high speed in a 2-pole configuration to reduce the dehydration rate as shown in FIGS. This is an output characteristic that can be enhanced. Therefore, first, start-up with a 6-pole configuration
The switching is performed by operating the switching relay 15f in a state where the FLSs 15g ₁ and 15g ₂ are cut off to form a power supply circuit to the windings 9c and 9d having a six-pole configuration, and then the FLS 15g ₁ is turned on to supply power. After a lapse of a predetermined time, F
LS15g ₁ is cut off to cut off the power supply to the drive motor 9,
By operating the switching relay 15f, the winding 9 of the two-pole configuration
e, a power supply circuit to 9f is formed, and then the FLS 15g
By turning on ₁ again to supply power, a high-speed dehydration drive with a two-pole configuration is realized.

The electric braking is performed as shown in FIGS. 21 and 22.
As shown in, first, stopping the power supply to the drive motor 9 in the high speed dehydration driven in two-pole construction by blocking FLS15g _1, then winding 9c hexapole configuration by operating the switching relays 15f , 9d, and then immediately or after a short pause, again
By g ₁ is made conductive to operate the drive motor 9 in the 6-pole configuration, to generate a braking torque to the drive motor 9 in the rotation speed exceeds the synchronous speed. Since the rotational speed of the drive motor 9 is to generate a drive torque equal to or less than synchronous speed, to prevent acceleration by the driving torque by the FLS15g ₁ viewed timely in cut-off state.

Thereafter, the vehicle naturally decelerates, or FLS1
Half-wave rectification is performed to perform zero-cross control of the conduction timing of 5g ₂ in half-wave units of the AC power supply voltage, and electric braking is performed by supplying a half-wave rectified voltage to the auxiliary winding 9d having a six-pole configuration. This electric braking is performed by the auxiliary winding 9f having a two-pole configuration.
Can be performed by applying a half-wave rectified voltage to the rectifier.

Also, as shown in FIG. 23 and FIG.
Immediately after the high-speed dehydrating drive of the pole configuration is stopped, or after a short pause, a half-wave rectified voltage is applied to the auxiliary winding 9f of the two-pole configuration to realize the operation.

FIG. 29 shows a modification of the relationship between electric braking and lid unlocking (lid opening) according to the lid opening instruction and the amount of laundry (washing load) in the water supply / drainage, washing and dehydration steps.

In the water supply, washing, and draining processes other than the dewatering process, the microcomputer 15a performs a process of immediately releasing the lid lock without performing electric braking when a lid opening instruction is input from the lid open key 16j. Do.

In the dehydration process, when the drive motor 9 is started up with a two-pole configuration, and when the lid is opened at a low speed during acceleration with a six-pole configuration, an instruction to open the lid from the lid open key 16j is input, the drive motor 9 is immediately turned off. The electric braking is performed for 10 seconds, and then the lid lock is released after a waiting time of 6 seconds.

When the drive motor 9 is changed from the six-pole configuration to the two-pole configuration, and a lid opening instruction is input from the lid opening key 16j during the period from the high-speed dehydration driving to the end of the dehydrating process, 1
Electric braking is performed for 5 to 20 seconds, and then, after a waiting time of 6 seconds, the lid is unlocked.

The pause time from the end of the high-speed dehydration drive to the end of the electric braking is changed according to the amount of cloth. For example, when the cloth amount is “small”, the pause is 10 seconds, and “large”
In the case of, it is paused for 15 seconds.

Further, the electric braking time after pausing is also changed according to the amount of cloth. For example, the electric braking is performed for 5 to 10 seconds for “small”, and the electric braking is performed for 10 to 15 seconds for “large”.

The driving motor 9 can be an inverter motor. When this inverter motor is used as the drive motor 9, the drive speed and the braking control are performed by changing the inverter frequency and the voltage along the output characteristic curve according to the speed command.
There is no need for a pole number switching relay circuit for switching the winding configuration.

If a direct drive system in which the drive motor 9 is directly connected to the washing shaft 7f, a pulley and a belt become unnecessary. However, it is necessary to attach a member (an alternative part of a pulley) having an engagement hole for engaging / disengaging the slider 7i which engages with the dehydration shaft 7e and moves up and down with the washing shaft 7f. Even if the drive motor 9 is not installed directly, if the drive motor 9 is installed concentrically below the washing shaft 7f, the center of gravity of the outer tub 1 in the assembled state can approach the center line to improve the weight balance. This is effective for supporting the tank 1 in vibration isolation.

[0113]

According to the present invention, an electric washing machine using a pole number conversion type single-phase induction motor as a drive motor for driving a washing and spin-drying tub is provided. And then accelerated with a winding configuration with a large number of poles, and then switched back to a winding configuration with a small number of poles to perform high-speed dehydration drive, making the configuration simple and improving dehydration performance. It can be an excellent electric washing machine.

Further, after the high-speed spin-drying operation is completed, the electric braking is performed by the drive motor, so that an electric washing machine having a simple configuration and high safety can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a fully automatic electric washing machine showing an embodiment of the present invention.

FIG. 2 is a bottom view showing a state where components are installed outside a bottom wall of an outer tub in the fully automatic electric washing machine shown in FIG. 1;

FIG. 3 is a bottom view of an outer tub in the fully automatic electric washing machine shown in FIG. 1;

FIG. 4 is a partial vertical side view of an outer tub in the fully automatic electric washing machine shown in FIG. 1;

FIG. 5 is a longitudinal sectional side view showing a part of a clutch / rotation prevention device in the fully automatic electric washing machine shown in FIG. 1 and a developed view of a part thereof.

FIG. 6 is a vertical sectional side view of a part of the clutch / detent device in the fully automatic electric washing machine shown in FIG. 1;

FIG. 7 is a bottom view of a part of the clutch / detent device shown in FIG. 6;

FIG. 8 is a vertical sectional side view showing an operation (washing drive) of a detent function of a clutch / detent device in the fully automatic electric washing machine shown in FIGS. 6 and 7;

9 is a vertical sectional side view showing a clutch connection function operating (dehydrating drive) state of the clutch / rotation prevention device in the fully automatic electric washing machine shown in FIGS. 6 and 7. FIG.

FIG. 10 is a vertical side view of a mechanism part of a lid lock / runout detection unit in the fully automatic electric washing machine shown in FIG. 1;
It shows a lid unlocked state.

11 is a vertical side view of a mechanism part of a lid lock / runout detection unit in the fully automatic electric washing machine shown in FIG. 1,
The lid lock state is shown.

12 is an output characteristic curve diagram of a drive motor in the fully automatic electric washing machine shown in FIG.

FIG. 13 is a dehydration drive characteristic curve diagram in the fully automatic electric washing machine shown in FIG. 1;

FIG. 14 is a plan view of an operation panel in the fully automatic electric washing machine shown in FIG.

15 is a block diagram showing an electrical configuration of the fully automatic electric washing machine shown in FIG.

FIG. 16 is a characteristic diagram of a water level drop during washing in a fully automatic electric washing machine.

FIG. 17 is a flowchart of a washing control process in the fully automatic electric washing machine shown in FIG. 1;

FIG. 18 is a dehydration control processing flowchart in the fully automatic electric washing machine shown in FIG. 1;

FIG. 19 is a dehydration driving characteristic diagram at the time of light load in the fully automatic electric washing machine shown in FIG. 1;

FIG. 20 is a characteristic diagram of a shower dehydration rinsing control process in the fully automatic electric washing machine shown in FIG. 1;

FIG. 21 is a characteristic diagram showing an example of an electric braking control process in a dehydration process of the fully automatic electric washing machine shown in FIG.

FIG. 22 is a characteristic diagram showing another example of the electric braking control process in the dehydration process of the fully automatic electric washing machine shown in FIG.

FIG. 23 is a characteristic diagram showing still another example of the electric braking control process in the dehydration process of the fully automatic electric washing machine shown in FIG.

FIG. 24 is a characteristic diagram showing still another example of the electric braking control process in the spin-drying process of the fully automatic electric washing machine shown in FIG.

FIG. 25 is a characteristic diagram showing electric braking time in a dehydration process of the fully automatic electric washing machine shown in FIG. 1;

26 is a flowchart of a control process for realizing electric braking characteristics in the dehydration process shown in FIG.

FIG. 27 is a flowchart illustrating an example of control processing for performing electric braking and lid unlocking in the fully automatic electric washing machine illustrated in FIG. 1 with reference to control history information.

FIG. 28 is a flowchart showing an example of a control process for performing electric braking and lid unlocking in the fully automatic electric washing machine shown in FIG. 1 with reference to an open / close state of a drain valve.

29 is a diagram showing the relationship between electric braking and lid unlocking (lid opening) according to the lid opening instruction and the amount of cloth (washing load) in the water supply / drainage, washing and dehydration steps of the fully automatic electric washing machine shown in FIG. 9 is a time chart illustrating a modification.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outer tub, 1c ... Reinforcement rib, 2 ... Outer frame, 5 ... Washing and dewatering tub, 6 ... Stirring blade, 7 ... Clutch / rotation prevention device, 7a ...
Housing, 7e: dehydrating shaft, 7f: washing shaft, 7i: slider, 7k, 9b: pulley, 7r: operating lever, 9: drive motor, 10: electric drain valve, 11: belt, 12: top cover, 12a ... clothing inlet, 13 ... water supply solenoid valve, 1
5: controller, 16: operation panel, 17: lid, 18
... Lid lock / runout detection unit.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiyasu Kamano 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture Within the Electrification Equipment Division of Hitachi, Ltd. (72) Inventor Tamotsu Kamori Higashitaga, Hitachi City, Ibaraki Prefecture 1-1-1, Machi F-Term (Electrical Equipment Division, Hitachi, Ltd.) 3B155 AA06 AA10 BB05 BB10 CA05 CB06 HB02 HB03 HB10 HB24 LA02 LA11 LB25 LC03 LC07 LC13

Claims (9)

[Claims] 1. An electric washing machine using a pole-conversion type single-phase induction motor as a drive motor for driving a washing and spin-drying tub. An electric washing machine characterized in that the electric washing machine is further accelerated by a winding configuration having a large number of poles, and thereafter, is again switched to a winding configuration having a small number of poles to perform high-speed dehydration drive. 2. The driving motor according to claim 1, wherein
An electric washing machine comprising a pole / 6-pole conversion type single-phase induction motor. 3. The electric washing machine according to claim 1, wherein after the high-speed spin-drying operation is completed, the drive motor is operated in a multi-pole winding configuration to perform electric braking. 4. The electric washing machine according to claim 3, wherein the electric braking is performed by operating with a multi-pole winding structure after a short pause after completion of the high-speed spin-drying operation. 5. The electric washing machine according to claim 3, wherein a half-wave rectified voltage is applied after the electric braking operation in the multi-pole winding configuration to further perform the electric braking. 6. The method according to claim 5, wherein the half-wave rectified voltage is
An electric washing machine characterized in that a voltage is applied to an auxiliary winding. 7. The electric braking system according to claim 1, wherein a half-wave rectified voltage, a full-wave rectified voltage, or a DC smoothing voltage is applied to the drive motor after the high-speed spin-drying operation is completed. Electric washing machine. 8. The electric washing machine according to claim 7, wherein the electric braking is performed after a short pause after completion of the high-speed spin-drying operation. 9. The electric washing machine according to claim 7, wherein the half-wave rectified voltage is applied to an auxiliary winding.