JP2002159782A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform drying by preventing laundry from being easily damaged and suppressing wrinkles owing to the entangling of laundry in a washing and drying machine provided with a process for supplying a warm air into an internal tub having a rotary center axis in the nearly vertical direction so as to dry clothes. SOLUTION: The internal tub 4 having the rotary center axis in the nearly vertical direction is freely rotatably supported inside an external tub 3 which is elastically hung in a case 1, a rotary blade 5 is disposed in the inner bottom part of the internal tub 4 so as to be freely rotatable, the internal tub 4 or the rotary blade 5 is driven by a motor 9, the warm air heated by a heater 13 is supplied to the internal tub 4 by a drying blower 12 and a cool air is introduced by a cool air blower 17 from an outer part to the inner side of the case 1. A control means controls washing and drying processes and also controls the motor 9 to permit the rotation per minute of the rotary blade 5 in the drying process to be higher than that in the washing process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing / drying process which has a process of drying clothes by blowing warm air into an inner tub having a rotation center axis in a vertical direction, and capable of performing washing to drying consistently. It is about the machine.

[0002]

2. Description of the Related Art Conventionally, this type of washing and drying machine is disclosed in
As disclosed in Japanese Patent Publication No. 1-70288, an inner tank having a rotation center axis in a vertical direction is rotatably supported in an outer tank elastically suspended in an outer box, and an inner bottom portion of the inner tank is provided. In the washing and rinsing steps, the rotating wings are rotated to wash the laundry (clothing) in the inner tub and rinsed, and in the dehydration step, the inner tub is rotated at a high speed to dehydrate. In the drying step following the dehydration step, the air heated by the heating device is blown into the inner tank by a blower to be dried.

The operation of the above configuration will be briefly described. In the drying process, the rotating blades are rotated at a speed lower than the rotation speed in the washing process to loosen the laundry in the loosening drying, and the inner tub is rotated in the drying process. Is rotated at a lower speed than the rotation speed during the spinning cycle to rotate the laundry to dry.

[0004]

In such a conventional washing and drying machine, when rotating the rotating blades in the drying process, the laundry is bounced in order to make the rotating speed of the rotating blades lower than that in the washing process. Since it is not expected to raise, the friction between the laundry and the convex portion of the rotor becomes large, and the laundry is easily damaged,
In addition, there is a problem that the laundry is easily entangled, and as a result, wrinkles are easily generated.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to make it possible to dry laundry while suppressing the occurrence of wrinkles caused by the laundry being hardly damaged.

[0006]

According to the present invention, in order to achieve the above object, an inner tank having a rotation center axis in a substantially vertical direction is rotatably supported in an outer tank elastically suspended in a housing. And
Rotating blades are rotatably provided on the inner bottom of the inner tank, the inner tank or the rotating blades are driven by driving means, warm air heated by heating means is blown into the inner tank by blowing means, and the housing is cooled by cooling blowing means. A cooling air is introduced from the outside into the inside, and the control means controls the operations of the driving means, the blowing means, the heating means, the cooling and blowing means, etc. to control the washing and drying steps, and the control means controls the drying step. The driving means is controlled so that the number of revolutions of the rotor blades becomes higher than the washing stroke.

[0007] Thus, during drying while rotating the rotor, the rotor is rotated at a higher speed than the washing process, so that it is possible to dry the laundry while jumping up, and the laundry is less likely to be damaged. It is possible to suppress the occurrence of wrinkles due to the entanglement of laundry and to enable drying.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is characterized in that an outer tub elastically suspended in a housing, a rotation center axis is provided in a substantially vertical direction, and the outer tub is rotatable in the outer tub. The supported inner tank, a rotating blade rotatably provided at the inner bottom of the inner tank, a driving unit for driving the inner tank or the rotating blade, a blowing unit for blowing hot air into the inner tank, Heating means for heating the air blown by the blowing means, cooling air blowing means for introducing cooling air from outside into the housing, and the driving means,
Control means for controlling operations of a blowing means, a heating means, a cooling blowing means and the like to control the washing and drying steps, wherein the control means makes the number of revolutions of the rotary blades in the drying step higher than in the washing step. As described above, the driving means is controlled so that the laundry can be dried while jumping up, and the damage of the laundry due to the rubbing of the laundry and the convex portion of the rotary wing is reduced, and Drying can be performed while suppressing the occurrence of wrinkles caused by entanglement.

According to a second aspect of the present invention, there is provided an outer tub elastically suspended in a housing, an inner tub having a rotation center axis in a substantially vertical direction and rotatably supported in the outer tub, A rotating blade rotatably provided on the inner bottom of the inner tank, a driving means for driving the inner tank or the rotating blade, a blowing means for blowing hot air into the inner tank, and air blown by the blowing means Heating means for heating, cooling air blowing means for introducing cooling air from outside into the housing, the driving means, blowing means, heating means,
Control means for controlling the operation of the cooling air blowing means and the like to control the washing and drying steps, wherein the control means makes the on-time ratio of the on-off time during the rotation of the rotary blades in the drying step lower than that of the washing step. As described above, the driving means is controlled, and during the washing, the laundry can be appropriately switched up, down, left, and right by a sufficient stirring action,
It is possible to wash without uneven washing, and during drying it is possible to minimize the friction between the lower laundry and the convex part of the rotary wing, so that the damage to the laundry is reduced and wrinkles caused by the entanglement of the laundry are reduced. Drying can be performed with generation suppressed.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the control means includes a driving means such that a start-up when the rotating blades are turned on during the drying process is stronger than that in the washing process. Is controlled, and
In the drying process, the rotation of the rotor is rapidly accelerated, and the centrifugal force is suddenly applied to the laundry, so that the laundry can be dried while jumping up. Damage to the laundry due to rubbing is reduced, and wrinkles due to the entanglement of the laundry can be suppressed and drying can be performed.

According to a fourth aspect of the present invention, in the first or the second aspect of the present invention, the control means controls the driving means so that braking when the rotor is turned off during the drying process is stronger than during the washing process. Is controlled, and
The damage of the laundry can be minimized during washing and drying.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a housing 1 has a structure in which an outer tub 3 is elastically supported by a plurality of suspensions 2 and vibrations during operation are absorbed by the suspension 2. Inside the outer tub 3, the inner tub 4 having a rotation center axis in the vertical direction and accommodating laundry and a drying object (hereinafter referred to as “clothing”) is rotatably supported. The rotating blades 5 that stir are rotatably provided. The rotary blade 5 is formed in a pot shape with an outer peripheral surface having an inclined surface shape.

A number of small holes (not shown) are provided on the inner peripheral wall of the inner tank 4, and a fluid balancer 6 is provided above the small holes. And near the bottom center of the outer tank 3 and the inner tank 4,
A washing / dewatering shaft 7 having a hollow biaxial structure and a speed reducer / clutch 8 for switching the transmission of rotational force to the washing / dewatering shaft 7 during washing or dewatering and decelerating to 1/6 during washing are provided. I have. The motor (driving means) 9 is
And the inner tub 4 or the rotary blade 5 is driven via the speed reducer / clutch 8.

A passage is formed from a lower part of the outer tank 3 to a circulation duct 11 through a telescopic lower bellows-shaped hose 10,
The outlet of the circulation duct 11 is a drying blower (blower means) 12
Connected to the entrance. The outlet of the drying blower 12 is connected to a passage 11a, a heater 13 serving as a heating means is provided in the passage 11a, and an extendable upper bellows hose 14 is connected to the passage 11a. The upper bellows-shaped hose 14 is open toward the inner tank 4, and since the inner tank 4 communicates with the outer tank 3 through a small hole in the inner peripheral wall, these passages constitute a circulation path.

An openable and closable inner lid 15 is provided in the upper part of the inner tank 4, and a hot air outlet 16 connected to an extendable upper and lower bellows-shaped hose 14 is opened near the inner lid 15. The cooling blower (cooling blower) 17 is attached to a side surface of the housing 1 so that outside air can be introduced into the housing 1. The drain valve 18 drains the water in the outer tub 3, and the switching valve 19 switches the circulation path.

The water supply valve 20 is for supplying water into the inner tank 4, and the water level detecting means 21 is for detecting the water level in the outer tank 3.

The control device 22 controls a washing process including washing, rinsing, and dehydrating processes and a drying process following the washing process based on the settings set by the operation display unit 23. It is configured as shown in FIG.

The control means 24 comprises a microcomputer or the like, receives the output of the water level detecting means 21 and displays the setting contents on the display means 26 based on the setting contents set by the input setting means 25. The reduction gear / clutch 8, the motor 9, and the drying blower 1 are provided via a load driving unit 27 including a bidirectional thyristor and a relay.
2. Control the operations of the heater 13, the cooling blower 17, the drain valve 18, the switching valve 19, the water supply valve 20 and the like to control the washing and drying processes. 28 is a commercial power supply.

The rotation control means 29 is a part of the control means 24 and is constituted by a microcomputer or the like. The rotation control means 29 controls the inverter circuit 32 via the drive circuit 31 based on the information from the position detection means 30 to thereby control the motor 9. Is controlled to rotate.

The motor 9 is a DC brushless motor, which is not shown, and comprises a stator having a three-phase winding and a rotor having a two-pole permanent magnet disposed on a ring.
The stator is configured by winding a first winding 9a, a second winding 9b, and a third winding 9c constituting a three-phase winding around an iron core provided with slots.

The inverter circuit 32 is constituted by a switching element comprising a parallel circuit of a power transistor (IGBT) and a reverse conducting diode. A series circuit of a first switching element 32a and a second switching element 32b, a series circuit of a third switching element 32c and a fourth switching element 32d, and a fifth switching element 3
It comprises a series circuit of 2e and a sixth switching element 32f, and the series circuit of each switching element is connected in parallel.

Here, both ends of the series circuit of the switching elements are input terminals to which a DC power supply is connected, and output terminals are connected to connection points of two switching elements forming the series circuit of the switching elements. The output terminal is
The U terminal, the V terminal, and the W terminal are connected to a positive voltage, respectively, by the on / off combination of two switching elements that are connected to the U terminal, the V terminal, and the W terminal of the three-phase winding and that form a series circuit of switching elements. Zero voltage, release three states.

The switching elements are turned on and off by three position detecting means 30a, 30b and 30 each composed of a Hall IC.
It is controlled by the rotation control means 29 based on the information from c. The position detecting means 30a, 30b, 30c are arranged on the stator at intervals of 120 electrical degrees so as to face the permanent magnets of the rotor.

As shown in FIG. 3, during one rotation of the rotor, the three position detecting means 30a, 30b, 30c output pulses at the timings shown in FIG. The rotation control means 29 detects the timing of the arrow shown in the figure (when the state of any of the three position detection means changes), and detects the position detection means 30a, 30b, 3
By changing the ON / OFF state of the switching elements 32a to 32f based on the signal of 0c, the U terminal, the V terminal,
The W terminal is set to three states of positive voltage, zero voltage, and release, and the first winding 9a, the second winding 9b, and the third winding 9c of the stator are energized to generate a magnetic field and rotate the rotor. It is.

The switching elements 32a, 32c,
32e is controlled by pulse width modulation (PWM), for example, by controlling the energizing ratio of high and low at a repetition frequency of 10 kHz to control the number of rotations of the rotor. Position detecting means 3
0a, 30b, 30c, every time the state of the signal changes, the cycle is detected, the rotation speed of the rotor is calculated from the cycle, and the switching element 3 is set to the set rotation speed.
PWM control of 2a, 32c, 32e.

The resistor 33 detects current, and the resistor 3
It is assumed that the input current value of the inverter 32 is detected by the voltage between both ends of the inverter 3. The commercial power supply 28 is a diode bridge 3
4. It is connected to the inverter 32 via a DC power converter consisting of a choke coil 35 and a smoothing capacitor 36. However, this is only an example, and the configuration of the DC brushless motor 9 and the configuration of the inverter 32 are not limited thereto.

The rotation control means 29, as shown in FIG.
A rotation speed detection unit 29a that receives a signal from the position detection unit 30 to detect the rotation speed of the motor 9, a rotation speed setting unit 29b that sets the rotation speed of the motor 9, a rotation speed setting unit 29b, and a rotation detection unit. A rotational speed comparing means 29c for comparing the rotational speed detected at 29a; a rotational speed change detecting means 29d for detecting a rotational speed change amount;
An operation amount determining means 29e for determining the operation amount of the duty ratio of the switching elements 32a, 32c, 32e in order to make the rotation speed of the motor 9 closer to the set rotation speed based on the input from the rotation speed change amount detection means 29d and 9c. And the switching element 32 after being operated by the operation amount determining means 29e.
a ratio setting means 29f for setting the duty ratio of each of a, 32c and 32e and outputting the duty ratio to the drive circuit 31, and the switching element 32 gradually increased with the lapse of time from the start of the motor 9.
a, 32c, and 32e, and a duty ratio storage unit 29g that outputs the duty ratio to the drive circuit 31.

In the rotation control means 29, when the motor 9 is started, the number of times that the state of any one of the three position detection means 30a, 30b, 30c changes is three times, that is, until the motor 9 rotates by １ ／. Is a current-ratio storage means 29g.
The driving circuit 31 is driven by the output signal of the power supply ratio setting means 29f after that, thereby controlling the power supply ratio of the switching elements 32a, 32c and 32e.

FIG. 5 shows how the motor 9 rotates during washing. The motor 9 is turned on for 2 seconds and turned off for 1 second so that the speed of the motor 9 is 600 r / min, that is, the speed of the rotor 5 is 100 r / min. Shows the state of repeating the normal rotation reversal.

Here, the operation of rotating the motor 9 in the above configuration will be described with reference to FIG. FIG. 6 shows that the rotation control means 29 receives signals from the position detection means 30a, 30b, and 30c during washing, and
2 shows a method of controlling the energization ratio of each switching element of the inverter circuit 32 for controlling the rotation speed of the rotor 5.

First, at step 100, the abnormality counter is set to 0, and at step 101, the rotational speed of the motor 9 is set to, for example, 60
At 0 r / min, normal rotation and reverse rotation are alternately performed at step 102, and the motor 9 is turned on at step 103. Then, in step 104, start control is performed. Here, the startup control drives the drive circuit 31 to control the switching elements 32a, 32c, 32e of the inverter circuit 32 at a predetermined duty ratio for each elapsed time from the start of the startup.

At step 105, it is determined whether the number of times the state of any one of the position detecting means 30a, 30b, 30c changes is three times, that is, whether the motor 9 has rotated by half. If the rotation has been completed by two rotations, the startup control ends and the routine proceeds to step 110. If the rotation signal has not been input three times, the start control is continued.
If 0.6 seconds have not elapsed since the start of the operation, the process returns to the start control in step 104. If 0.6 seconds have elapsed,
If it is determined that the abnormality counter is some sort of abnormality, the routine proceeds to step 107, where the abnormality counter is incremented by one.
2. Assuming that the motor 9 is out of order, the driving of the motor 9 is stopped in step 109 to notify the abnormality.

As a method of notifying the abnormality, the display means 26
Thus, for example, "F12" is displayed to notify the user of the details of the abnormality. Further, a buzzer may be sounded so as to surely inform the user.

On the other hand, at step 108, the abnormal counter
If it has not reached, the routine returns to step 101, where the number of revolutions is set again as required, and the normal rotation / reversal is switched.

In step 110, in the process of switching from the starting control to the feedback control, an initial value of the duty ratio is set to stabilize the feedback control. In step 111, the rotation period of the motor 9 is detected, the rotation period data is converted into rotation speed data, and the switching elements 32a, 32c, 32
Feedback control is performed on the energizing ratio of e. Step 112
Then, if two seconds have not elapsed since the rotation of the motor 9, the process returns to step 111 to perform feedback control. If two seconds have elapsed, the motor 9 is turned off for one second in step 113, and then the washing time is determined in step 114. Is repeated until the process ends.

In the above, the motor 9 is set at 600 r / mi during washing.
n, that is, the rotation of the rotor 5 is repeated at 100 r / min for 2 seconds on and 1 second off, and the start-up control is set to 0.
This is an example showing a case where the rotation is performed for 6 seconds. In this example, the rotation of the motor 9 is controlled in the same manner even during the drying, and the rotation speed of the motor 9 is set to 900 r / m in step 101.
By setting “in” and changing the time of step 112 and step 113, the rotor 5 can be turned on for 0.4 seconds on and off for 2.6 seconds.
The determination as to whether or not to end the process may be made to determine whether or not the drying time while rotating the rotor 5 has ended.

FIG. 7 is a flowchart of a rotational speed feedback control subroutine of the motor 9, and FIG.
At 20, the time until the state of any of the signals of the position detecting means 30a, 30b, 30c changes, that is, the motor 9
Is detected, and in step 121, the rotation cycle data is converted into rotation number data. Then, in step 122, the change amount ΔN of the rotation speed is calculated, and in step 123, the deviation Ne between the set rotation speed Ns and the current rotation speed Nai is calculated.

In step 124, the variation ΔN and the deviation Ne
, The operation amount ΔDx of the energization ratio of the switching elements 32a, 32c, 32e is determined. And step 12
In step 5, the drive circuit 31 is driven so that the energization ratio of the currently output switching elements 32a, 32c, 32e is operated by ΔDx so that the rotation speed of the motor 9 becomes the set rotation speed.

As shown in FIG. 8, the operation display unit 23 includes a water level setting switch 25a, a washing time setting switch 25b,
Input setting means 25 such as a rinse number setting switch 25c, a dehydration time setting switch 25d, a drying time setting switch 25e, a start / pause switch 25f, a course setting switch 25g, a power on / off switch 25h, a water level display section 26a, Time display section 26b, rinse number display section 26c, dehydration time display section 26d, drying time display section 26
e, display means 26 such as a remaining time display section 26f and a course display section 26g.

The operation of the above configuration will be described. First,
The washing process will be described with reference to FIG. When the clothes 37, detergent, etc. are put into the inner tank 4 and the operation is started,
The water supply valve 20 is driven by the control device 22, water is supplied until the water level detected by the water level detection means 21 reaches a predetermined water level, and the motor 9 is driven to rotate the inner tank 4. At this time, the drain valve 18 and the switching valve 19 are closed.

As a result, the outer peripheral portion of the water in the inner tank 4 rises due to the centrifugal force. Along with this, the water between the inner tank 4 and the outer tank 3 rises along the inner wall of the outer tank 3, and then the inner tank 4
Is sprayed into the inner tank 4 from the upper part and circulates.
As a result, the water containing the detergent passes through the clothes 37 in the inner tank 4 and is washed.

Thereafter, the drain valve 18 is opened to drain the water, water is supplied again, and the clothes are rinsed in the same manner as in the washing step. In the dehydration step, the inner tub 4 containing the clothes 37 is rotated at a high speed. Due to the centrifugal force generated, the clothes 37
Is pressed against the inner wall of the inner tank 4, and the moisture is separated from the clothes 37 by this centrifugal force and dehydrated.

In the drying process, with the switching valve 19 opened, the hot air that has dried into the inner tank 4 through the upper bellows-shaped hose 14 and the hot air jet hole 16 is generated by the blowing of the drying blower 12 and the heat generated by the heater 13. Sent in.

At this time, the garment 37 is rotating together with the inner tub 4 due to the rotation of the inner tub 4, being flipped up or down by the left and right rotation of the rotary wing 5, and then falling. The warm air sent into the outer tub 4 draws moisture from the garment when passing through the gaps of the movement of the garment, and exits from the inner tub 4 to the inside of the outer tub 3 in a wet state. And passes through the switching valve 19 to reach the circulation duct 11. This flow is indicated by arrows in FIG.

When warm air containing moisture passes through the inner wall of the outer tub 3 and the inside of the circulation duct 11, the outer wall of the outer tub 3 and the circulation duct 11 are cooled by the inflow of external air by the cooling blower 17. As a result, the moisture of the humid air is condensed on the inner wall, and the humid warm air is dehumidified, and the
Return to. The moisture condensed on the inner wall of the outer tank 3 is transferred to the switching valve 19.
And is appropriately discharged from the drain port 38 together with moisture condensed on the inner wall of the circulation duct 11. Then, after the drying process is completed, a blowing process for driving the drying blower 12 and the cooling blower 17 is performed, and then the process ends.

The control method of the motor 9 by the control means 24 and the rotation control means 29 in the drying process will be described with reference to FIG.

FIG. 9 is a flowchart showing the flow of each step in the drying step of the present invention. When the washing step is completed and the drying step is started, first, in step 130, the clothes are dehydrated by the last dehydration of the washing step. Since it is stuck inside the tank 4,
The fabric is peeled off and a loosening process is performed to sufficiently loosen the clothes so that the area of contact with the air is increased. Specifically, the rotor 5 is rotated right and left five times in a period of 0.5 seconds on and 2.5 seconds off.

By doing so, the clothes stuck in the inner tub 4 at the time of dehydration come off from the inner tub 4, and the cloth of the garment increases, so that the contact area with the air increases, and the subsequent drying of the clothes. Make progress faster. At this time, since the drying process is performed, the air blowing of the drying blower 12 and the heater 13 are performed.
The upper bellows-shaped hose 14 and the hot air outlet 16
Dry hot air is sent to the inner tank 4 through the cooling device, and the cooling blower 17 is also driven.

Next, from step 131 to step 13
The first drying step to the third drying step having different time ratios between the tank rotation mode in which drying is performed while rotating the inner tank 4 and the rotating blade rotation mode in which drying is performed while rotating the rotary blade 5 are performed up to 3. ing. Table 1 shows the operation time, tank rotation time, and rotary blade rotation time of each process.

[0051]

[Table 1]

The time of each step is determined so that the clothes will be optimally dried when the garment has the rated capacity.
At 6 minutes, the time ratio of rotor rotation is about 6%. The second drying step is 50 minutes, the time ratio of the rotor rotation is 20%, and the third drying step is 100 minutes, the time ratio of the rotor rotation is 100%. The rotation time ratio is set to be high.

According to experiments by the inventors, in the case of this type of washing and drying machine, drying while rotating the rotor 5 is more effective.
It has been found that the drying time can be reduced as compared with the drying while rotating the inner tank 4 or in a stationary state. For this reason, a method is considered in which drying is mainly performed by rotating the rotary blades 5 from the initial stage of drying. However, this causes the clothes to become entangled and causes wrinkles. On the other hand, when the drying rate of the garment exceeds 90%, it is found that the entanglement and wrinkles of the garment hardly progress even with the rotation of the rotary wing 5 as a main component.

Therefore, by setting the three drying steps as described above, it is possible to reduce the occurrence of wrinkles caused by cloth entanglement, and to change clothes up, down, left and right, and to apply uniform warm air to the clothes. So you can
It is possible to dry efficiently without drying unevenness.

Then, in step 134, after performing a blowing step of driving the drying blower 12 and the cooling blower 17, drying is terminated in step 135.

FIG. 10 shows a state of the start control in step 104 in FIG. 6 when the rotary blade 5 is rotated during washing or drying. The switching ratio of the switching elements 32a, 32c, 32e of the inverter circuit 32 is set to a
Although the initial value is set to 20% and raised to 50% in 0.4 seconds, during drying b, the initial value is set to 30% and raised to 80% in 0.4 seconds.

The rated capacity of the laundry is, for example, 8 kg at the time of washing and 5 kg at the time of drying. The rated capacity of the laundry is small at the time of drying and the amount of water is small at the time of drying. The torque is smaller in the dry state, and even if the above-described start control is performed, the motor 9 is not locked and an overcurrent does not flow to the motor 9 or the inverter circuit 32, so that it is not unsafe.

FIG. 11 shows a change with time of the rotation speed of the motor 9 when rotating the rotary blade 5 during washing or drying. At the time of washing a, normal rotation reversal is repeatedly performed at a set rotation speed of 600 r / min for 2 seconds on and 1 second off. When the rotating blade 5 is rotated during the drying b, the rotation is repeated at a set rotation speed of 900 r / min for 0.4 seconds on and 2.6 seconds off for reversing the normal rotation.

Here, the electromagnetic brake is applied when the motor 9 is turned off.
Is turned off from the state where it is rotating at approximately 600 r / min, and after 0.6 seconds, the electromagnetic brake is applied to gradually stop. On the other hand, at the time of drying b, the motor 9 is turned off from the state of rotating at approximately 900 r / min, and the electromagnetic brake is applied 0.2 seconds later to stop suddenly.

As a method of applying the electromagnetic brake, the switching elements 32b, 32d,
By simultaneously turning on 2f, the three-phase windings 9a, 9b, and 9c of the motor 9 are short-circuited.

It should be noted that the electromagnetic brake need not be applied if there is no problem during washing. In addition, the electromagnetic brake control method is not limited to the above-described method, and the position detection means 30a, 3
A method of controlling the switching elements 32a to 32f of the inverter circuit 32 to rotate in the reverse direction based on the states of 0b and 30c, and the position detection means 30a, 30b and 30c
There is a method of controlling the switching elements 32a, 32c, 32e of the inverter circuit 32 so as to perform braking based on the state described above, but the same effect is obtained.

As described above, according to the present embodiment, the rotation speed of the rotor 5 is set to 100 r / min in the washing process and 150 r / min in the drying process, and the rotation speed of the rotor 5 in the drying process is higher than that in the washing process. It is to become.
This makes it possible to dry the laundry while jumping it up, to reduce the damage of the laundry due to the rubbing of the laundry and the convex portions of the rotary wings 5 and to suppress the occurrence of wrinkles caused by the entanglement of the laundry. Can be dried. In addition, since the laundry is dried while jumping up, the warm air can reach the laundry underneath, and the laundry can be dried efficiently without drying unevenness.

On the other hand, if the number of revolutions of the impeller is set to be the same as that in the drying step in the washing step, only the impeller 5 rotates at a high speed and cannot catch and agitate the laundry, so that it cannot rotate with the lower laundry. The wings rub strongly and the laundry is easily damaged. Therefore,
By setting the rotation speed of the rotary wing 5 to 100 r / min in the washing process, the laundry can be appropriately switched up, down, left, and right, and the laundry can be washed without uneven washing.

The rotation time of the rotary blade 5 is set to 2 seconds on and 1 second off in the washing process, and 0.4 second on and 2.6 seconds off in the drying process. By making the on-time ratio of the time period lower than the washing process, the laundry can be switched up, down, left, and right with sufficient agitation during washing, making it possible to wash without uneven washing, During drying, the friction between the lower laundry and the protrusions of the rotary wings 5 can be suppressed as much as possible, so that damage to the laundry can be reduced, and wrinkles due to the entanglement of the laundry can be suppressed and drying can be performed.

Further, since the start-up at the time of turning on the rotating blades 5 in the drying step is made stronger than in the washing step, the rotation of the rotating blades 5 is rapidly accelerated in the drying step, so that the laundry can be washed. Since the centrifugal force is suddenly applied, the laundry can be dried while jumping up, and the damage of the laundry due to the friction between the laundry and the convex portion of the rotary wing 5 is reduced, and the laundry is entangled. Drying can be performed while suppressing generation of wrinkles.

On the other hand, if the start-up at the time of rotation of the rotor 5 during the washing process is performed in the same manner as in the drying process, the load on the motor 9 during the washing process is greater than during the washing process. In some cases, the number of revolutions of the motor 9 does not increase, and at that time, an overcurrent flows through the motor 9 and the inverter circuit 32, which may make the motor 9 unsafe. Therefore, by making the startup at the time of washing slower than at the time of drying, it is possible to prevent an overcurrent from flowing through the motor 9 and the inverter circuit 32 regardless of the state of the laundry.

Further, the braking when the rotary blade 5 is turned off during rotation in the drying process is made stronger than in the washing process. This is because if the rotating blades 5 continue to rotate while the rotating blades 5 are off during drying, the time for the laundry to rub against the protrusions of the rotating blades 5 and the inner tub 4 becomes longer, so that the laundry is easily damaged. At the time, the braking at the time of turning off of the rotary wing 5 is strengthened, so that the damage of the laundry can be suppressed as much as possible.

On the other hand, during the washing, the inertia of the laundry and the water during the rotation of the rotor 5 is very large, so that the friction between the laundry and the convex portion of the rotor 5 is minimized by weakening the braking when the rotor is off. It can reduce the damage of the laundry.

In the present embodiment, the drying operation is controlled in three drying steps having different time ratios between the tank rotation mode and the rotary blade rotation mode. However, the present invention is not limited to this.
Further effects can be obtained by finely controlling the process by dividing it into further drying steps.

The time of each stroke, the time of tank rotation in each step, the time of rotor rotation, the number of rotations of tank, the time limit of rotor rotation, the number of rotations, etc. are one embodiment of the present invention. It is not limited to these numerical values.

Although the DC brushless motor is used as the driving means and the inverter is controlled, an induction motor may be used, and the start control and the rotation control of the steady speed may be performed by the phase control. .

[0072]

As described above, according to the first aspect of the present invention, the outer tub resiliently suspended in the housing and the rotation center axis is provided in a substantially vertical direction. An inner tank rotatably supported on the inner tank, a rotating blade rotatably provided on an inner bottom portion of the inner tank, a driving unit for driving the inner tank or the rotating blade, and a blower for blowing hot air into the inner tank. Means, heating means for heating the air blown by the blowing means, cooling blowing means for introducing cooling air from the outside into the housing, and the driving means, blowing means, heating means, cooling blowing means and the like Control means for controlling operations to control the washing and drying steps, wherein the control means controls the driving means so that the number of revolutions of the rotor in the drying step is higher than that in the washing step. It is possible to dry while jumping up the laundry Reduces the damage to the laundry due to the protrusion of the laundry rotating blades rub against, the laundry can be dried by suppressing the occurrence of wrinkles due to entangled.

According to the second aspect of the present invention, the outer tank elastically suspended in the housing and the inner tank having a rotation center axis in a substantially vertical direction and rotatably supported in the outer tank. A tank, a rotating blade rotatably provided on the inner bottom of the inner tank, a driving unit for driving the inner tank or the rotating blade, a blowing unit for blowing hot air into the inner tank, and the blowing unit. Heating means for heating the air to be blown, cooling air blowing means for introducing cooling air from the outside into the housing, and controlling the operations of the driving means, blowing means, heating means, cooling air blowing means, etc. Control means for controlling a drying step, wherein the control means controls the driving means so that an on-time ratio of an on-off time period during the rotation of the rotor in the drying step is lower than a washing step. During washing, the operating rate of agitation rises, Laundry reasonably can be interchanged vertically and horizontally to the use 拌作, it is possible to washing without washing unevenness, washing time can also be shortened.
In addition, during drying, the friction between the lower laundry and the convex portion of the rotor can be suppressed as much as possible, so that the damage of the laundry is reduced, and the wrinkles due to the entanglement of the laundry can be suppressed and drying can be performed. .

According to the third aspect of the present invention, the control means controls the driving means so that the start-up when the rotor is turned on in the drying process during rotation is stronger than in the washing process. In the drying process, the rotation of the rotor is rapidly accelerated, so that the laundry is rapidly centrifugally applied. Therefore, it is possible to dry the laundry while jumping up the laundry. The rubbing of the laundry reduces the damage to the laundry, and reduces the occurrence of wrinkles caused by the entanglement of the laundry, thereby enabling drying. On the other hand, by making the startup at the time of washing slower than at the time of drying, it is possible to prevent an overcurrent from flowing to the motor and the inverter circuit regardless of the state of the laundry.

According to the fourth aspect of the present invention, the control means controls the driving means so that the braking when the rotor is turned off during the rotation of the rotor in the drying step is stronger than in the washing step. In addition, it is possible to minimize damage to the laundry during washing and drying.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a washing / drying machine according to an embodiment of the present invention.

FIG. 2 is a block diagram of a main part of the washing and drying machine.

FIG. 3 is a timing chart showing a method of driving a motor of the washing and drying machine.

FIG. 4 is a main block diagram of a rotation control unit of the washing and drying machine.

FIG. 5 is a rotation characteristic diagram of a motor of the washing and drying machine.

FIG. 6 is a main part flowchart of a rotation control unit of the washing and drying machine.

FIG. 7 is a main part flowchart of a rotation control unit of the washing and drying machine.

FIG. 8 is a front view of an operation display unit of the washing and drying machine.

FIG. 9 is a main part flowchart showing a drying process of the washing and drying machine.

FIG. 10 is a control characteristic diagram of a rotation control unit of the washing and drying machine.

FIG. 11 is a rotation characteristic diagram of a motor of the washing and drying machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 3 Outer tank 4 Inner tank 5 Rotating blade 9 Motor (driving means) 12 Drying blower (blowing means) 13 Heater (heating means) 17 Cooling blower (cooling blowing means) 24 Control means

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Makio Tahara 1006 Kazuma Kadoma, Kadoma-shi, Osaka F-term in Matsushita Electric Industrial Co., Ltd. (reference) 3B155 AA10 AA16 BA09 BB16 CA06 CB07 LA11 LB17 LC02 MA01 MA05 MA06 MA07 MA08 MA10

Claims (4)

[Claims] 1. An outer tub elastically suspended in a housing, an inner tub having a rotation center axis in a substantially vertical direction and rotatably supported in the outer tub, and a rotatable inner bottom portion of the inner tub. Rotating blades provided freely, driving means for driving the inner tank or the rotating blades, blowing means for blowing hot air into the inner tank, heating means for heating the air blown by the blowing means, Cooling air blowing means for introducing cooling air from outside to the inside of the housing, and a control means for controlling operations of the driving means, blowing means, heating means, cooling blowing means and the like to control washing and drying processes, A washing and drying machine wherein the control means controls the driving means so that the number of revolutions of the rotor in a drying step is higher than in a washing step. 2. An outer tub resiliently suspended in a housing, an inner tub having a rotation center axis in a substantially vertical direction and rotatably supported in the outer tub, and a rotatable inner bottom of the inner tub. Rotating blades provided freely, driving means for driving the inner tank or the rotating blades, blowing means for blowing hot air into the inner tank, heating means for heating the air blown by the blowing means, Cooling air blowing means for introducing cooling air from outside to the inside of the housing, and a control means for controlling operations of the driving means, blowing means, heating means, cooling blowing means and the like to control washing and drying processes, A washing / drying machine according to claim 1, wherein said control means controls said driving means so that an on-time ratio of an on / off time period when said rotor is rotated in a drying step is lower than a washing step. 3. The washing / drying machine according to claim 1, wherein the control means controls the driving means such that activation at the time of rotation of the rotor during the drying process is turned on more strongly than in the washing process. 4. The washing / drying machine according to claim 1, wherein the control means controls the driving means such that braking during turning off of the rotor during the drying process is stronger than in the washing process.