JP2002166090A - Washing/drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drive a plurality of motors by controlling a plurality of inverter circuits by a control means, to freely control the number of rotation regardless of the frequency of an electric power source and to realize downsizing and low price in a washing and drying machine in which each process of washing, rinsing, dehydrating and drying is controlled. SOLUTION: An inner tank is freely rotatably supported in the outer tank being hung in a casing and the inner tank or a rotor blade is driven by means of the first motor 37 and a self-water suction pump for suction of water such as water in a bathtub is driven by the second motor 40 and a blower for drying for blowing hot air heated by means of a heater 15 is driven by means of the third motor 43. A DC electric power in rectifier circuits 31, 32 and 33 connected with an AC electric source 29 is converted to an AC electric power by means of a plurality of inverter circuits 34, 35 and 36 to drive the first motor 37, the second motor 40 and the third motor 43. The control means 46 is constituted in such a way that it simultaneously controls a plurality of the inverter circuits 34, 35 and 36 and simultaneously drives a plurality of the motors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing and drying machine for sequentially controlling a series of steps of washing, rinsing, spin-drying and drying.

[0002]

2. Description of the Related Art Conventionally, this type of washer / dryer has been proposed as shown in FIG. Hereinafter, the configuration will be described.

As shown in FIG. 8, a housing 1 has an outer tub 3 resiliently suspended by a plurality of suspensions 2 therein.
And the suspension 2 absorbs vibration during dehydration. Inside the outer tub 3, an inner tub 4 for storing laundry and objects to be dried is rotatably disposed around a washing / dehydrating shaft 5 having a hollow and double structure. Rotary wings 6 for stirring clothes (laundry and objects to be dried) are rotatably arranged.

In addition, a number of small holes (not shown) are provided on the inner peripheral wall of the inner tank 4, and a fluid balancer 7 is provided above. In the drying process, the rotating blades 6 are provided with a stirring protruding portion 9 on the upper surface of a substantially dish-shaped base having an inclined surface 8 on the outer periphery. It is easy to soar upward along 8.

[0005] The motor 10 is attached to the bottom of the outer tank 3,
It is connected to the inner tub 4 or the rotary wing 6 via the clutch 11 for switching the transmission of the rotational force to the washing / dehydrating shaft 5 and the washing / dehydrating shaft 5 during washing or spinning.

The heat exchanger 12 dehumidifies heat by circulating wet hot air, and has one end connected to the lower part of the outer tub 3 through a telescopic lower bellows-shaped hose 13 and the other end. It is connected to one end of a drying blower 14. Drying blower 14
The other end of the inner tank 4 is connected to a hot air supply passage 16 having a heater 15 as a heating means, and passes through an upper bellows-shaped hose 17.
To form a warm air circulation path 18 that circulates.

The outer tub 3 is provided with an outer tub cover 19 for airtightly covering the upper surface of the outer tub 3. The outer tub cover 19 is provided with a hot air outlet 20 from a telescopic upper bellows-shaped hose 17. It is open. An inner lid 21 is provided on the outer tank cover 19 so as to be openable and closable so that clothes can be taken in and out.

The housing cover 22 covers the upper part of the housing 1 and includes an operation display means 23, a self-priming water pump 24 that absorbs bath water or the like and supplies water into the inner tub 4, and supplies tap water. A water supply valve 25 is provided. A drain valve 26 for draining water into the outer tub 3 is provided at the bottom of the outer tub 3.
The cooling blower 27 is attached to the side surface of the housing 1,
It is configured to be able to blow air to cool the outer tank 3, the heat exchanger 12, and the like inside.

The control device 28 includes a microcomputer, and includes a motor 10, a clutch 11, and a drying blower 1.
4, control the operation of the heater 15, the self-priming water pump 24, the water supply valve 25, the drain valve 26, the cooling blower 27, etc.
The system is configured to sequentially control a series of steps of rinsing, dewatering, and drying.

The operation of the above configuration will be described. In the washing process, when the inner lid 21 is opened, clothes (laundry) are put into the inner tub 4 and the operation is started, water is supplied to a predetermined water level by the self-priming water pump 24 or the water supply valve 25, and then the motor 10 is driven. . At this time, the power of the motor 10 is transmitted to the rotor 6 via the washing shaft by the clutch 11 of the transmission mechanism,
The rotation of the rotating blade 6 causes the stirring protrusion 9 of the rotating blade 6 to rotate.
Thus, the washing is performed by the mechanical force acting upon contact between the laundry or the inner wall of the inner tub 4 or the rotating blades 6 and the water flow force.

In the dehydration step, after the washing is completed, the drain valve 26 is opened to drain the water in the inner tub 4, and then the clutch 11 of the transmission mechanism is switched to the dehydration side, and the power of the motor 10 is transmitted via the dehydration shaft. The rotation is performed by transmitting the rotation to the inner tank 4 to apply centrifugal force to the clothing, thereby separating moisture from the clothing.
When the dehydration process is completed, the process proceeds to the drying process.

When the drying process is started, the clutch 11 is switched to the washing side, the motor 10 is driven and transmitted to the rotary blade 6,
By rapidly rotating and reversing the rotor 6, the clothes stuck to the inner wall of the inner tub 4 after the dehydration are peeled off. Next, the drainage valve 26 is closed, the rotating blades 6 are rotated forward and inverted, and the clothes are hooked and agitated by the agitating protrusions 9 while the drying blower 1 is stirred.
The hot air is sent to the hot air outlet 20 by the hot air blowing means composed of the heater 4 and the heater 15. The warm air blown into the inner tank 4 from the warm air outlet 20 evaporates moisture from the clothes, and then exits from the inner tank 4 to the inside of the outer tank 3, passes through the lower bellows-shaped hose 13, It reaches the heat exchanger 12.

[0013] The warm air containing moisture by depriving the clothes of moisture,
When passing through the inner wall of the outer tub 3 and the inside of the heat exchanger 12, the outer wall of the outer tub 3 and the heat exchanger 12 are cooled by the inflow of external air by the cooling blower 27 installed on the side surface of the housing 1. As a result, dew condensation occurs in the inside, and the moist warm air is dehumidified and returns to the drying blower 14. By circulating the warm air in the warm air circulation path 18, the clothes in the inner tank 4 can be dried.

[0014]

However, in such a conventional configuration, the motor 10, the drying blower 14, and the self-priming water pump 24 are constituted by AC motors, so that the number of revolutions depends on the frequency of the AC power supply. There is a problem, it is difficult to quickly rotate and reverse, it is difficult to obtain a strong rotational force,
There is a problem that the capacity of the self-priming water pump 24 and the blowing capacity of the drying blower 14 are reduced.

Further, the hot air circulation path 18 must be formed in a limited space in the housing 1 in consideration of the swing of the outer tub 3 in the dehydration process, and a passage having a sufficient sectional area is required. Could not be configured. For this reason, it is necessary to increase the wind speed in order to secure a predetermined air volume required for drying, and there has been a problem that the drying blower 14 cannot be constituted by an AC motor.

The present invention solves the above-mentioned problems, and controls a plurality of inverter circuits by one control means.
An object of the present invention is to drive a plurality of motors and freely control the number of rotations of the motors irrespective of the frequency of the AC power supply, thereby realizing small size, low cost, and low noise.

[0017]

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
A rotating blade is rotatably provided on the inner bottom of the inner tank, the inner tank or the rotating blade is driven by a first motor, and a self-priming water pump driven by a second motor absorbs bath water or the like into the inner tank. Water is supplied, hot air heated by a heating means is blown into the inner tank by a blowing means driven by a third motor, and DC power of a rectifier circuit connected to an AC power supply is converted to AC power by a plurality of inverter circuits. Driving the first to third motors, and the control means blows, heats,
It is configured to control operations of the inverter circuit and the like, and to control processes such as washing, rinsing, dehydration, and drying, and the control unit is configured to simultaneously control a plurality of inverter circuits and drive a plurality of motors simultaneously. Things.

By controlling a plurality of inverter circuits with one control means, a plurality of motors are driven,
The number of revolutions of the motor can be freely controlled irrespective of the frequency of the AC power supply, and a small size, low cost, and low noise can be realized.

[0019]

According to the first aspect of the present invention, there is provided an outer tub elastically suspended in a housing, and having a rotation center axis in a substantially vertical direction and rotatably inserted into the outer tub. A supported inner tank, a rotating blade rotatably provided on the inner bottom of the inner tank, a first motor driving the inner tank or the rotating blade, and a second motor driven by a second motor to absorb bath water and the like. A self-priming water pump for supplying water into the inner tank, a blowing means driven by a third motor to blow warm air into the inner tank, a heating means for heating air blown by the blowing means, and an AC power supply A plurality of inverter circuits for converting the DC power of the rectifier circuit connected to the AC power into AC power to drive the first to third motors, and controlling and washing the operations of the blowing means, the heating means, the inverter circuits, etc. And control means for controlling processes such as rinsing, dehydration, and drying. The control means controls the plurality of inverter circuits at the same time to drive a plurality of motors at the same time. By controlling the plurality of inverter circuits with one control means, the plurality of motors are controlled. , And the number of rotations of the motor can be freely controlled irrespective of the frequency of the AC power supply, thereby realizing compactness, low cost, and low noise.

According to a second aspect of the present invention, in the first aspect of the present invention, the DC power is supplied to the plurality of inverter circuits by one rectifier circuit. By sharing, a small size and low price can be realized.

According to a third aspect of the present invention, in the first or second aspect of the present invention, there is provided a load switching means for switching an output of the inverter circuit, and the load switching means connects the inverter circuit to at least two motors. It is selectively connectable, and by driving a plurality of motors with one inverter circuit, the number of inverter circuits can be reduced as compared with the number of motors, and a small size and low price can be realized.

The invention described in claim 4 is the above-described claim 1 to claim 1.
3. The invention according to claim 3, further comprising overcurrent detection means for detecting an overcurrent of the inverter circuit according to a motor connected to the inverter circuit, wherein the control means selects the overcurrent detection means according to a motor to be driven. In addition to preventing the abnormal temperature rise of a motor having a small capacity among a plurality of motors, the motor lock detection accuracy can be improved, and the DC brushless motor constituting each motor can be permanently Demagnetization of the magnet rotor can be prevented,
Reliability can be improved at a low price.

The invention described in claim 5 is the above-mentioned claim 1
4. The invention according to claim 4, further comprising a sensorless position detecting means for detecting the position of the rotor by detecting the back electromotive force of the motor, and setting the positions of the rotors of the second motor and the third motor to one position. The structure is such that the detection is performed by the detection means, which can be reduced from the number of the position detection means, the circuit can be simplified, and a small size and a low price can be realized.

[0024] The invention according to claim 6 provides the above-mentioned claims 1 to
5. The invention according to claim 5, further comprising overcurrent detection means for detecting an overcurrent of the inverter circuit, wherein outputs from the plurality of overcurrent detection means are connected to one interrupt input of a microcomputer of the control means, and at least one All motors are stopped when a signal is output from the overcurrent detection means. By using only one interrupt input to the microcomputer, the program can be simplified and the inverter circuit can be controlled instantaneously. The motor can be stopped, and the reliability can be improved at a low price.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1) As shown in FIG. 1, an AC power supply 29
AC power is added to each of 2, 33 and converted into DC power by each rectifier circuit. The DC power converted by the rectifier circuit 31 is applied to an inverter circuit 34, the DC power converted by the rectifier circuit 32 is applied to an inverter circuit 35, and the DC power converted by the rectifier circuit 33 is applied to an inverter circuit 36.

The inverter circuit 34 includes a first motor 37
The first motor 37 drives the inner tank 4 or the rotary wing 6 as shown in FIG. The first motor 37 is constituted by a DC brushless motor, and a relative position (rotor position) between a permanent magnet constituting a rotor and a stator is detected by a position detecting means 38. The position detecting means 38 is usually constituted by a Hall IC. The overcurrent detecting means 39 is connected between the positive voltage terminal of the inverter circuit 34 and the positive voltage terminal of the rectifier circuit 31.

The inverter circuit 35 includes a second motor 40
And the second motor 40 drives the self-priming water pump 24a to absorb bath water and supply water into the inner tub 4. The second motor 40 is constituted by a DC brushless motor, and detects a back electromotive force of the second motor 40 to detect a rotor position.
The sensorless type position detecting means 41 is configured. The overcurrent detecting means 42 is connected between the positive voltage terminal of the inverter circuit 35 and the positive voltage terminal of the rectifier circuit 32.

The inverter circuit 36 includes a third motor 43
To the drying blower 1 by the third motor 43.
4a is driven so that the warm air heated by the heater 15 is blown into the inner tank 4. Third motor 43
Constitutes a so-called sensorless position detecting means 44 for detecting a rotor position by detecting a back electromotive force of the third motor 43. The overcurrent detection means 45 is connected between the positive voltage terminal of the inverter circuit 36 and the positive voltage terminal of the rectifier circuit 33.

The control device 28a includes an inverter circuit 34,
35, 36, a control means 46, a switching means 47, and the like.
5, 36, the switching means 47 is controlled to control processes such as washing, rinsing, spin-drying and drying, and is constituted by one microcomputer 48 and its peripheral circuits.

The operation of the above configuration will be described. In addition,
Since the basic operation from the washing step to the drying step is the same as in the conventional example, detailed description will be omitted.

When the operation is started in the washing step, the control means 46 controls the inverter circuit 35 and controls the second motor 4.
0 drives the self-priming water pump 24a to supply bath water or the like to the inner tub 4 to a predetermined water level. Thereafter, the inverter circuit 34 is controlled, and the inner tub 4 or the rotary wing 6 is driven by the first motor 37 to wash the clothes.

In the drying process, the inverter circuit 34 is controlled, and the inner tub 4 or the rotary wing 6 is driven by the first motor 37, so that the clothes are sowed or loosened.
At the same time, the inverter circuit 36 is controlled, and the drying blower 14a is driven by the third motor 43 so that the heater 1
The warm air heated by 5 is sent into the inner tank 4, and the clothes are dried by circulating the warm air.

As described above, according to the present embodiment, the inverter circuits 34, 35 and 36 for driving the first motor 37, the second motor 40 and the third motor 43 are controlled by one control means 46. Irrespective of the frequency of the AC power supply 29, the number of rotations of the first motor 37, the second motor 40, and the third motor 43 can be freely controlled, thereby realizing small size, low cost, and low noise. Can be.

In this embodiment, the motor for driving the cooling blower 27 is not driven by the inverter circuit.
First motor 37, second motor 40, third motor 4
As in the case of No. 3, it goes without saying that the motor may be constituted by a DC brushless motor and driven by an inverter circuit.

(Embodiment 2) As shown in FIG. 3, an AC power supply 29 applies AC power to a rectifier circuit 49 via a filter circuit 30 and converts the power into DC power by the rectifier circuit 49.
The DC power converted by the rectifier circuit 49 is configured to be applied to the inverter circuits 34, 35, and 36. Other configurations are the same as those in the first embodiment.

As described above, according to the present embodiment, the DC power is shared by the inverter circuit 34 and the
By adding to 35 and 36, a small size and low price can be realized.

(Embodiment 3) As shown in FIG. 4, the DC power converted by the rectifier circuit 49 is
4, 50. The output of the inverter circuit 50 is connected to one of the second motor 38 and the third motor 39 by the load switching means 51. Load switching means 51
Can be constituted by a so-called 3c contact relay, but may be constituted by one 2c contact relay and one 1c contact relay, or there is no particular problem even if it is constituted by three 1c contact relays.

The control means 52 controls the load switching means 51 so that the output of the inverter circuit 50 is switched by the load switching means 51 to drive one of the second motor 40 and the third motor 43. Make up. Other configurations are the same as those of the second embodiment.

The operation of the above configuration will be described. In addition,
Since the basic operation from the washing step to the drying step is the same as in the conventional example, detailed description will be omitted.

When the operation is started in the washing process, the control means 52 switches the load switching means 51 to the side of the second motor 40, controls the inverter circuit 50, and controls the second motor 40.
Drives the self-priming water pump 24a to supply bath water and the like to the inner tub 4 to a predetermined water level. Thereafter, the inverter circuit 34 is controlled, and the inner tub 4 or the rotary wing 6 is driven by the first motor 37 to wash the clothes.

In the drying process, the inverter circuit 34 is controlled, and the inner tub 4 or the rotary wing 6 is driven by the first motor 37, so that the clothes are sowed or loosened.
At the same time, the load switching means 51 is switched to the third motor 43 side, the inverter circuit 50 is controlled, the drying blower 14a is driven by the third motor 43, and the heater 15
The hot air heated by the air is blown into the inner tank 4, and the warm air is circulated to dry the clothes.

As described above, according to this embodiment, when all the motors are not driven at the same time, a plurality of motors that are not driven at the same time are switched and driven by one inverter circuit, so that the number of inverter circuits is reduced. It is possible to further reduce the size and realize a small size and a low price.

(Embodiment 4) As shown in FIG. 5, overcurrent detecting means 53 and 54 are connected between the positive voltage terminal of the inverter circuit 50 and the positive voltage terminal of the rectifier circuit 49. The overcurrent detection means 53 outputs a signal when an overcurrent flows through the second motor 40, and the overcurrent detection means 54 outputs a signal when an overcurrent flows through the third motor 43.

The control means 55 is configured so that the output of the overcurrent detection means 53 and the output of the overcurrent detection means 54 can be selected. Other configurations are the same as those of the third embodiment.

The operation of the above configuration will be described. The control unit 55 selects the output of the overcurrent detection unit 53 in the water supply process, and controls the second inverter circuit 50 when the overcurrent flows to the second motor 40, and controls the second motor 40. Stop. Further, in the drying process, the output of the overcurrent detecting means 54 is selected, and when an overcurrent flows to the third motor 43, the inverter circuit 50 is controlled and the third motor 43 is stopped.

As described above, according to this embodiment, not only the abnormal temperature rise of a motor having a small capacity among a plurality of motors can be prevented, but also the accuracy of detecting a motor lock can be improved, and each motor is constituted. The permanent magnet rotor of the DC brushless motor can be prevented from being demagnetized, and the reliability can be improved at low cost.

(Embodiment 5) As shown in FIG. 6, the position detecting means 56 comprises a second motor 40 and a third motor 43.
To detect the position of the rotor by detecting the back electromotive force of
The sensorless type position detecting means 56 is configured so that the positions of the rotors of the second motor 40 and the third motor 43 can be shared and detected. The control means 57 is configured to control the inverter circuit 50 by a signal from the position detection means 56 and drive the second motor 40 or the third motor 43. Other configurations are the same as those of the fourth embodiment.

The operation of the above configuration will be described. The control means 57 sets the load switching means 51 to the second in the water supply process.
And the inverter circuit 50 is controlled by a signal from the position detecting means 56, and the second motor 4
0 drives the self-priming water pump 24a to supply bath water or the like into the inner tub 4.

In the drying process, the load switching means 5
1 to the third motor 43 side, and the position detecting means 56
, The third motor 43 drives the drying blower 14a, the warm air heated by the heater 15 is blown into the inner tank 4, and the warm air is circulated to remove the clothes. dry.

As described above, according to this embodiment, the number of the position detecting means can be reduced, and the circuit can be simplified, and the size and the price can be reduced.

(Embodiment 6) As shown in FIG. 7, the outputs from the overcurrent detection means 39, 53, 54 are connected to one interrupt input 60 of a microcomputer 59 of the control means 58, and at least one overcurrent The first motor 37, the second motor 40, and the third motor 43 can all be stopped when a signal is output from the detection means. Other configurations are the same as those of the fifth embodiment.

The operation of the above configuration will be described. When at least one output signal of the overcurrent detection means 39, 53, 54 enters the interrupt input 60 of the microcomputer 59, the control means 58 controls the first motor 37, the second motor 40, and the third motor 43. To stop everything.

As described above, according to the present embodiment, the number of interrupt inputs to the microcomputer 59 can be reduced by providing one interrupt input to the microcomputer 59, the program can be simplified, and the inverter circuit can be instantaneously controlled. The motor can be stopped, and the reliability can be improved at a low price.

[0055]

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 tub rotatably supported on the inner tub, a rotatable blade rotatably provided on the inner bottom of the inner tub, a first motor for driving the inner tub or the rotary wing, and a bath water driven by a second motor. Self-priming water pump that absorbs water and supplies water into the inner tank, blowing means driven by a third motor to blow warm air into the inner tank, and heating means for heating air blown by the blowing means And a plurality of inverter circuits for converting DC power of a rectifier circuit connected to an AC power supply to AC power to drive the first motor to the third motor, and operations of the blower, the heater, the inverter, and the like. Control the process of washing, rinsing, dewatering, drying etc. Control means, wherein the control means controls the plurality of inverter circuits at the same time and drives a plurality of motors at the same time. The motor can be controlled freely, regardless of the frequency of the AC power supply.
Low noise can be realized.

According to the second aspect of the present invention, since a single rectifier circuit supplies DC power to a plurality of inverter circuits, a single rectifier circuit is used to reduce the size and size of the inverter circuit. The price can be realized.

According to the third aspect of the present invention, there is provided a load switching means for switching the output of the inverter circuit,
Since at least two inverter circuits can be selectively connected to the motor by the load switching means, the number of inverter circuits can be reduced from the number of motors by driving a plurality of motors with one inverter circuit. , Small size and low price can be realized.

According to the fourth aspect of the present invention, there is provided an overcurrent detecting means for detecting an overcurrent of the inverter circuit in accordance with the motor connected to the inverter circuit, and the control means is adapted to operate in accordance with the motor to be driven. Therefore, since the overcurrent detection means is configured to be selected, not only the abnormal temperature rise of a motor having a small capacity among a plurality of motors can be prevented, but also the motor lock detection accuracy can be improved. The permanent magnet rotor of the DC brushless motor can be prevented from being demagnetized, and the reliability can be improved at low cost.

According to the fifth aspect of the present invention, there is provided a sensorless position detecting means for detecting the back electromotive force of the motor to detect the position of the rotor.
Since the position of the rotor of the motor is detected by one position detecting means, the number of the position detecting means can be reduced, the circuit can be simplified, and the size and the price can be reduced.

According to the present invention, there is provided an overcurrent detecting means for detecting an overcurrent of the inverter circuit, and outputs from the plurality of overcurrent detecting means to one of the microcomputers of the control means. Since all motors are stopped when a signal is output from at least one overcurrent detection means connected to the interrupt input, the program can be simplified by using only one interrupt input to the microcomputer. Thus, the inverter circuit can be instantaneously controlled to stop the motor, and the reliability can be improved at a low price.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of a washing / drying machine according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the washing and drying machine.

FIG. 3 is a block circuit diagram of a washer / dryer according to a second embodiment of the present invention.

FIG. 4 is a block circuit diagram of a washing / drying machine according to a third embodiment of the present invention.

FIG. 5 is a block circuit diagram of a washing / drying machine according to a fourth embodiment of the present invention.

FIG. 6 is a block circuit diagram of a washing / drying machine according to a fifth embodiment of the present invention.

FIG. 7 is a block circuit diagram of a washer / dryer according to a sixth embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a conventional washing and drying machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 3 Outer tank 4 Inner tank 6 Rotating blade 14a Drying blower (blowing means) 15 Heater (heating means) 24a Self-priming water pump 29 AC power supply 31 Rectifying circuit 32 Rectifying circuit 33 Rectifying circuit 34 Inverter circuit 35 Inverter circuit 36 Inverter Circuit 37 First motor 40 Second motor 43 Third motor 46 Control means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B155 AA10 AA16 AA17 BB05 BB18 BB19 CA06 CB07 CB42 CB49 CB51 HB09 KB08 LC15 MA01 MA08 MA09

Claims (6)

[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. A freely provided rotating blade, a first motor for driving the inner tank or the rotating blade, a self-priming pump driven by a second motor to absorb bath water and supply water to the inner tank; A blower that is driven by the motor and blows warm air into the inner tank, a heating unit that heats the air blown by the blower, and converts DC power of a rectifier circuit connected to an AC power supply to AC power. And a plurality of inverter circuits for driving the first to third motors, and control means for controlling operations of the blowing means, the heating means, the inverter circuits and the like, and controlling processes such as washing, rinsing, dehydrating, and drying. Wherein the control means includes the plurality of invars. A washing and drying machine configured to simultaneously control a plurality of motors to simultaneously drive a plurality of motors. 2. The washing and drying machine according to claim 1, wherein a DC power is supplied to the plurality of inverter circuits by one rectifier circuit. 3. The washing and drying machine according to claim 1, further comprising a load switching means for switching an output of the inverter circuit, wherein the load switching means enables at least two of the inverter circuits to be selectively connected to a motor. 4. An overcurrent detecting means for detecting an overcurrent of the inverter circuit according to a motor connected to the inverter circuit, wherein the control means selects the overcurrent detecting means according to a motor to be driven. The washing and drying machine according to any one of claims 1 to 3, which is configured. 5. A sensorless type position detecting means for detecting a back electromotive force of a motor to detect a position of a rotor, wherein the positions of the rotors of the second motor and the third motor are determined by one position detecting means. The washing / drying machine according to any one of claims 1 to 4, wherein the washing / drying machine is configured to detect. 6. An overcurrent detecting means for detecting an overcurrent of the inverter circuit, wherein outputs from the plurality of overcurrent detecting means are connected to one interrupt input of a microcomputer of the control means, and at least one overcurrent is detected. The washing and drying machine according to any one of claims 1 to 5, wherein all the motors are stopped when a signal is output from the detection means.