JP2005177332A - Rotating machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating machine capable of agitating objects to be treated and rotating a rotary tub, for which the means of agitation and rotation are arranged compactly and dead space is reduced. <P>SOLUTION: The rotating machine having a rotatable cylindrical rotary tub for housing the objects to be treated is provided with a tub rotation means for rotating the rotary tub by making force act in a rotating direction on the tub side wall of the rotary tub. Also, the tub rotating means comprises a plurality of first tub wall rotors composed of permanent magnets disposed on the tub side wall, a plurality of external stators disposed on the outer side of the rotary tub so as to be close to the first tub wall rotors and composed of a core coil constituting a motor together with the plurality of first tub wall rotors, and a drive circuit for energizing the external stators so as to rotate the rotary tub. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotating machine including a rotating tub provided with an internal space for storing an object, and more particularly to a rotating washing machine including a washing tub for storing water and a laundry.

A typical rotating machine that stores an object in a rotating tub and processes the object includes a washing machine that stores water and a laundry in a laundry tub and wash the laundry.
In a conventional washing machine, a stirring blade called a pulsator or a washing tub arranged around the bottom of the washing tub or the axial center of the rotation center axis of the washing tub is driven to rotate. These agitating blades or washing tubs are driven by a motor such as an induction motor via a power transmission mechanism such as a belt or gear connected to the rotation shaft (see, for example, Patent Document 1).
Further, without using a power transmission mechanism such as a belt or a gear, a pulsator or a washing tub is rotated by directly connecting a motor, for example, a linear motor, directly to the rotating shaft of the pulsator or the washing tub (see, for example, Patent Document 2). ).

JP-A-8-155190 JP-A-8-172757

  However, since a conventional washing machine drives a rotating shaft such as a pulsator or a washing tub via a belt or gear, a power transmission mechanism such as a belt or gear is arranged at the bottom of the washing machine, so a space for it is prepared in the housing. Must. Further, when the motor is directly connected to the rotating shaft of the pulsator or the washing tub, there is a problem that a space for installing the motor is required below the washing tub, resulting in a high washing machine.

  An object of the present invention is to provide a rotating machine that can stir an object to be processed and rotate a rotating tank, and that has a small dead space by arranging these stirring and rotating means in a compact manner.

  The rotating machine according to the present invention is a rotating machine including a rotatable cylindrical rotating tank that accommodates an object to be processed, and a tank that rotates the rotating tank by applying a force in a rotating direction to a tank side wall of the rotating tank. It has a rotating means.

  The effect of the rotating machine according to the present invention is that the tank rotating means for driving the rotation of the rotating tank from the tank wall side has a high degree of freedom in the position of the rotating machine in which it is installed, so that it is likely to become a dead space of the rotating machine. Easy to pay. Furthermore, when the means for rotating the rotating tank is used in addition to the tank rotating means, the rotating means can be reduced in capacity, so that the external dimensions of the rotating machine can be reduced. Moreover, since it is easy to install a plurality of tank rotating means in the rotating tank, a larger rotational driving force can be obtained and the capacity of each tank rotating means can be reduced. Furthermore, since it is easy to install a plurality of tank rotation means in the rotation center axis direction of the rotation tank or the rotation direction of the rotation tank, it is possible to reduce oscillation during rotation of the rotation tank, to stabilize the rotation of the rotation tank, and to achieve a shaft center member. It is possible to contribute to the reduction of wear.

As an embodiment of the rotating machine according to the present invention, a description will be given below of a washing machine in which a workpiece is a laundry and the laundry is washed. In addition, as uses other than the washing machine of the rotating machine of the present invention, a dryer provided with a rotating tub similar to the washing tub of the washing machine, a dehydrator for dehydrating the object to be processed, a pulverizer for pulverizing the object to be processed (juice Use juicers and mills), or agitators to stir various workpieces.
Embodiment 1 FIG.
1 is a longitudinal sectional view of a washing machine according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the washing machine of the first embodiment. FIG. 3 is an enlarged schematic cross-sectional view of the periphery of the dewatering plate and the washing tub of the washing machine in the first embodiment. 1 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 2 is a cross-sectional view taken along the line BB in FIG.

  This washing machine has a rectangular tube-shaped casing 1 that houses each part of the washing machine. The casing 1 has a bottom plate 2 that closes one end of the opening of the rectangular cylinder and an outer lid 3 that opens and closes the other end. And are provided. The casing 1 is installed so that the central axis of the square tube is perpendicular to the installation ground so that the bottom plate 2 is in contact with the installation ground of the washing machine. Further, on the upper portion of the housing 1, there are arranged switches for turning on / off the power source or selecting an operation mode (not shown) and indicators for displaying the operation status and water level. The housing 1 is made of a coated steel plate, stainless steel or resin.

  Further, the washing machine has a bottomed cylindrical washing tub 4 housed in the housing 1 and rotatably supported. The washing tub 4 closes the cylindrical side portion 5 and one end portion of the cylindrical shape. It consists of a bottom 6. The bottom portion 6 is disposed so as to face the bottom plate 2 of the housing 1. An opening at one end of the washing tub 4 is disposed so as to face the outer lid 3 of the housing 1. The bottom 6 of the washing tub 4 has a conical shape with a truncated head protruding outside the washing tub 4, and the bottom 6 is rotatably supported in a horizontal plane by a bearing 7 fixed to the housing 1. The bottom part 6 of the washing tub 4 has a conical shape along the rotation center axis 8 and is configured to be easily drained. The weight of the washing tub 4, water, and the laundry are supported by the bearing 7 so as to rotate. The cylindrical washing tub 4 can rotate around the central axis of the cylinder, and this central axis is referred to as the rotation central axis 8 of the washing tub 4. An inner lid 9 that opens and closes the opening is provided at the upper end of the washing tub 4. The washing tub 4 is made of stainless steel.

In addition, the opening part of the upper part of the housing | casing 1 and the washing tub 4 is opened for taking in / out of the laundry, and the outer lid 3 and the inner lid 9 which can be freely opened and closed so as to cover the opening part are provided. It is attached. When the washing tub 4 is rotating, such as during washing and dehydration, the outer lid 3 and the inner lid 9 close the openings at the top of the housing 1 and the washing tub 4 to prevent water droplets from scattering and to prevent sound. . Note that the outer lid 3 or the inner lid 9 may not necessarily be provided, and at least one of them may not be provided.
The washing tub 4 allows water to flow through the wall of the washing tub 4 including the bottom portion 6 and the side portion 5 inside and outside the washing tub 4 when the inner lid 9 is closed and a drain valve 21 described later is closed. There is no dewatering hole that can be used, and water is supplied into the washing tub 4 from a water supply port (not shown) at the top of the washing tub 4 when washing.

  Furthermore, the washing tub 4 includes rotation transmitting portions 10a and 10b that transmit the rotation of an external rotating body to the upper edge and the lower edge of the outer surface of the side portion 5 to rotate the washing tub. The rotation transmitting portions 10a and 10b are ring-shaped, and the rotation transmitting portions 10a and 10b are screwed to the washing tub 4 so that the inner surface of the ring is inscribed in the outer surface of the side portion 5 of the washing tub 4, and caulked or bonded. It is fixed with an agent. A material having a large friction coefficient such as rubber is used for the rotation transmitting portions 10a and 10b.

  Next, a dehydrating plate 11 is disposed inside the washing tub 4. The dewatering plate 11 is supported by a frame (not shown) fixed to the washing tub 4. The dewatering plate 11 faces the inner surface of the side portion 5 of the washing tub 4 and is divided into four in the circumferential direction of the washing tub 4, and when these are combined, the side surface dewatering plate 12, the bottom portion 6 and the side portion 5 are formed. And a bottom dewatering plate 13 disposed at the boundary. As shown in FIG. 3, the dewatering plate 11 has a corrugated plate shape, and the dewatering plate 11 is provided with a number of dewatering holes 14 provided so that water can be passed through the front and back of the dewatering plate 11. Further, dewatering plate legs 15 for supporting the dewatering plate 11 on the washing tub 4 are provided at a fixed pitch on the surface of the dewatering plate 11 facing the inner surface of the washing tub 4. Is supported by a suction cup 16 so as to be detachable. A water passage 17 and a dewatering groove 18 are formed between the dewatering plate 11 supported in this manner and the inner surface of the washing tub 4, and serve as a water passage during dewatering. In FIG. 3, a corrugated plate with a dewatering hole 14 is formed, and a dewatering groove 18 is formed on the inner surface side to facilitate drainage particularly during dewatering. Further, by providing the dewatering plate legs 15, the water passage 17 can be made sufficiently large. The bottom dewatering plate 13 is formed of a disk that is divided into four fan shapes and is installed so as to be detachable. In FIG. 1, the length of the leg is changed depending on the position in order to arrange the bottom dewatering plate 13 horizontally. The dewatering plate 11 is made of a stainless steel plate.

The bottom dewatering plate 13 is not arranged horizontally as shown in FIG. 1, but is arranged along the inner surface of the conical bottom 6 of the washing tub 4, or the apex that protrudes the central portion to the inside of the washing tub 4. You may arrange | position so that it may become the cone shape.
Further, the side surface dewatering plate 12 is integrated in the axial direction of the rotation center shaft 8 in FIG. 1, but may be divided. By dividing in the rotational direction and the axial direction, the attachment / detachment unit becomes smaller, and the attachment / detachment of the side surface dewatering plate 12 becomes easier. Further, the number of divisions of the side surface dewatering plate 12 and the angle with respect to the horizontal may be different.

Moreover, if it can attach firmly so that it may not become unstable by rotation of the washing tub 4, such as fitting the member provided in the tank wall side and the member attached to the dehydration board leg part 15, it will not restrict to this. . In the case where the dewatering plate 11 is divided, it is desirable that the division seam is not so large as to prevent the laundry from entering the gap.
Further, the dewatering plate 11 may be a net as a structure penetrating the inside and outside of the dewatering plate 11.
Further, the dewatering plate 11 may be a flat plate or a plate having a surface embossed and having a dewatering hole 14 in a concave portion of the emboss. Furthermore, if at least a part of the dewatering plate 11 is made of a porous body having high water absorption or water absorption, a polymer having water absorption, or the like, the dewatering holes 14 are not necessarily provided. Further, when the dewatering plate 11 is provided with corrugations such as a corrugated plate, the dehydrating plate leg portion 15 may not be particularly provided. Instead of the length of the dewatering plate leg 15, the water passage 17 of the washing tub 4 can be secured by the thickness of the dewatering plate 11.

Next, as shown in FIG. 1, a stirring blade 19 is fixed to the side surface dewatering plate 12 to cause water flow in the water including the laundry in the washing tub 4 by rotating together with the washing tub 4. Four stirring blades 19 are provided equally spaced apart in the direction of rotation of the washing tub 4, and are provided in two rows on the top and bottom, and eight in total. Each stirring blade 19 is a flat blade having a streamline cross section, and is installed obliquely with respect to the horizontal. The stirring blade 19 is made of resin, but may be metal.
The two agitating blades 19 that are installed apart from each other in the axial direction of the rotation center shaft 8 are arranged vertically with respect to the rotation direction of the washing tub 4, but are arranged at different positions in the rotation direction. May be. Further, the stirring blade 19 is not attached but may be integrally formed with the dehydrating plate 11. Further, the agitating blade 19 may be a projection that protrudes to the inside of the washing tub 4, and may be anything that can cause a water flow in the washing tub 4 as the washing tub 4 rotates. However, in order not to damage the laundry as much as possible, it is desirable that the stirring blade 19 does not have an acute angle portion.
Further, a stirring blade 19 similar to the side surface dewatering plate 12 may be fixed to the bottom dewatering plate 13.
Further, the stirring blade 19 does not use a joint of the dewatering plates 11 such as the side surface dewatering plate 12 and the bottom dewatering plate 13 that are divided into a plurality of portions, does not open a part of the dewatering plate 11, and does not install the dewatering plate 11. You may make it fix to the tank wall inner surface side of the washing tub 4 by providing a place.

Further, the washing tub 4 has a cylindrical drain pipe 20 fixed to the top of the bottom 6 of the washing tub 4 that is cut off and an end opposite to the end of the water pipe 20 to which the bottom 6 is fixed. A fixed drain valve 21 is provided.
A drain tank 22 capable of receiving drainage is supported by the casing 1 at the outlet of the drain valve 21, and a water distribution outlet pipe 23 that guides drainage from the drain tank 22 to the outside of the casing 1 is a side surface of the casing 1. Alternatively, it is provided through the bottom surface. The drain tank 22 is provided with a water level sensor 24 that detects the water level of the drain tank 22 and closes the drain valve 21 when the water level of the drain tank 22 reaches a predetermined water level. The outlet of the drain valve 21 and the receptacle of the drain tank 22 are open, and it is sufficient to receive the waste water indirectly by separating them, and there is no need for a watertight seal. The drain valve 21 may be an electromagnetic valve or a valve that is mechanically operated using a power source such as a motor (not shown) attached to the housing 1. The drain pipe 20 and the drain valve 21 are configured integrally with the washing tub 4 and are configured to rotate together when the washing tub 4 is rotating. The drain tank 22 is not particularly provided, and the bottom plate 2 of the housing 1 may be used as a drain tank.
The drain pipe 20, drain valve 21, drain tank 22, and drain outlet pipe 23 are made of stainless steel, as it is difficult for mold to adhere to them. However, other metal materials or plastic resins (polypropylene, ABS, etc.) containing an antibacterial agent for weight reduction may be used. In particular, the drain pipe 20, the drain tank 22, and the drain outlet pipe 23 downstream from the drain valve 21 do not return to the washing tub even if mold or dirt adheres to them, so it is necessary to use stainless steel or an antibacterial material. There is no.

A tank rotating means 30 for rotating the washing tub 4 is provided in the gap between the housing 1 and the washing tub 4. The tank rotation means 30 includes a motor 32 having a power shaft 31 extending on both sides, a columnar rotation transmission roller 33 fixed to the power shaft 31 of the motor 32 and circumscribed to the rotation transmission units 10a and 10b, and a motor. Inverter 34 as a drive circuit for driving 32, and rotation transmission units 10 a and 10 b fixed to washing tub 4. Four rotation transmission rollers 33 are in contact with the rotation transmission units 10a and 10b, respectively, and a total of eight rotation transmission rollers 33 are used.
The motor 32 may be a direct current motor, a synchronous motor, an induction motor, or the like. However, from the viewpoint of long life and energy saving, or currently the most commonly used and mass-produced, the motor 32 is inexpensive. An induction motor that can be expected is desirable.
In addition, the rotation transmission roller 33, the power shaft 31, and the motor 32 are installed as an integrated assembly so as to press the washing tub 4 in the normal direction of the rotation center shaft 8. At this time, the motor 32 is supported from the housing 1 via a spring (not shown), or the power shaft 31 or the rotation transmission roller 33 is made elastic so that the washing tub 4 rotates with respect to the rotation. It is desirable to have a likelihood.
In addition, the tub rotating means 30 is configured to be placed at four corners that can be dead spaces inside the side portion 5 of the washing tub 4 and inside the rectangular tube-shaped casing 1, and effectively uses the space in the casing 1. Further, the rotational directions of the four motors 32 are all the same (including reverse rotation of all the motors 32), but for example, the rotational speed may be variable according to time for each washing mode. In this case, when an induction motor is used as the motor 32, the inverter needs to be an inverter as a drive circuit capable of changing the frequency or voltage of the output power supply. The installation positions of the rotation transmission roller 33 or the motor 32 do not have to be the four corners of the housing 1. Even if the rotation transmission rollers 33 are installed at the four corners of the housing 1, for example, one motor 32 drives the rotation transmission roller 33 corresponding thereto, and the other rotation transmission rollers 33 do not have the motor 32. It may be.

  Next, the operation will be described. A “normal mode” and a “reverse mode” are defined according to the rotation direction of the washing tub 4. However, the normal mode and the reverse mode may be either clockwise or counterclockwise when the washing tub 4 is viewed from above, but here, the normal mode is clockwise and the reverse mode is counterclockwise. When washing, first, the laundry, water and detergent are put into the washing tub 4 and the four motors 32 are rotated in the normal mode. The rotation of the motor 32 is transmitted to the rotation transmission units 10a and 10b via the power shaft 31 and the rotation transmission roller 33, and the washing tub 4 rotates in the forward direction. As it rotates, the mixture of the water and the laundry in the washing tub 4 is agitated by the agitating blade 19, and the laundry is washed as a complex water flow. Next, after a certain time, for example, 1 minute, the rotation direction of the motor 32 is changed and the reverse mode is performed. After repeating such a combination of the normal mode and the reverse mode several times, the washing tub 4 is stopped and the drain valve 21 is opened to drain the water. At the time of drainage, the water level sensor 24 detects the water level in the drain tank 22 and opens and closes the drain valve 21. For example, if the water level of the drain tank 22 is low, the drain valve 21 is opened, and if the water level is high, it is closed. At this time, the water level is set so that water does not leak from the drain tank 22. If the pipe size of the drain outlet pipe 23 is made sufficiently large compared to the amount of drainage from the drain pipe 20, the drain valve 21 can be set according to the water level of the drain tank 22 when draining from the washing tub 4. The opening / closing operation is not necessarily performed, and the opening / closing operation of the drain valve 21 or the water level sensor 24 can be omitted.

  Next, when rinsing the laundry, after closing the drain valve 21, water is again injected into the washing tub 4 and the washing tub 4 is rotated. This is basically the same operation as washing. Detailed description is omitted.

  Next, the operation when the laundry is dehydrated will be described. The drainage valve 21 is opened, and the motor 32 is controlled by an inverter so that the rotation speed of the washing tub 4 is larger than that when washing is performed, and the washing tub 4 is rotated. The water dehydrated from the laundry is further subjected to centrifugal force and gravity, via the dewatering groove 18, the dewatering hole 14 or the water passage 17 of the bottom dewatering plate 13, the side surface dewatering plate 12, and the drain pipe 20 and the drain valve 21. To the drainage tank 22 and drained out of the housing 1 through the drainage outlet pipe 23.

Such a washing machine has a high degree of freedom in the position of installing the tank rotating means for driving the rotation of the rotating tank from the tank wall side, and is therefore easy to be placed in a position that tends to become a dead space of the rotating machine.
Furthermore, when the means for rotating the rotating tank is used in addition to the tank rotating means, the rotating means can be reduced in capacity, so that the external dimensions of the rotating machine can be reduced.
Furthermore, since it is easy to install a plurality of tank rotating means in the rotating tank, a larger rotational driving force can be obtained and the capacity of each tank rotating means can be reduced.
Furthermore, since it is easy to install a plurality of tank rotation means in the rotation center axis direction of the rotation tank or the rotation direction of the rotation tank, it is possible to reduce oscillation during rotation of the rotation tank, to stabilize the rotation of the rotation tank, and to achieve a shaft center member. It is possible to contribute to the reduction of wear.
Furthermore, since there is no need to supply water outside the washing tub, washing with the minimum required amount of water can be performed.
Furthermore, since the dehydrating plate is detachable, it can be easily cleaned even if dirt such as mold adheres.

  The rotation of the washing tub 4 may be supported via a bearing or a bearing mechanism that is in contact with the side surface of the drain pipe 20. Further suppression can be achieved. A bearing that supports the weight of the washing tub 4 and a bearing mechanism (not shown) that supports the washing tub 4 may be provided separately or may be combined.

Alternatively, the rotation transmission units 10 a and 10 b may be omitted, and the rotation transmission roller 33 may be configured to directly contact the outer surface side of the side portion 5 of the washing tub 4. In this case, it is desirable that the surface material of the rotation transmission roller 33 has a large friction coefficient such as rubber.
In addition, the washing tub 4 does not fall by cutting grooves on both the rotation transmission roller 33 and the rotation transmission portions 10a and 10b or the outer surface of the side portion 5 of the washing tub 4 in contact with the rotation transmission roller 33 and engaging the uneven portions. You may make it support.

Embodiment 2.
4 is a longitudinal sectional view of a washing machine according to Embodiment 2 of the present invention. FIG. 5 is a cross-sectional view of the washing machine of the second embodiment. FIG. 6 is a view showing the arrangement of the permanent magnets and the arrangement of the core coils constituting the washing machine of the second embodiment. 4 is a cross-sectional view taken along the line AA in FIG. 5, and FIG. 5 is a cross-sectional view taken along the line BB in FIG.
The washing machine of the second embodiment is the same as the washing machine of the first embodiment except for the means for rotating the washing tub. Similar parts are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.

  The washing machine rotator 40 includes a first tub wall rotor 41 fixed to the upper half and the lower half of the outer surface of the side portion 5 of the washing tub 4, and a first tub wall rotor 41 outside the washing tub 4. An external stator 42 fixed to the housing 1 in the vicinity of one tank wall rotor 41, and a guide stator 43 fixed to the housing 1 below the rotation center axis 8 of the external stator 42. And an inverter 44 as a drive circuit for exciting the external stator 42.

  The first tank wall rotor 41 is composed of 16 permanent magnets as shown in FIG. 6, and the permanent magnets are fixed to the outer surface of the side portion 5 of the washing tub 4 in a ring shape. The polarities of the permanent magnets are perpendicular to the outer surface of the washing tub 4, and the polarities of adjacent permanent magnets are alternately reversed. The direction of the magnetic field generated by the individual permanent magnets constituting the first tank wall rotor 41 is generally the normal direction of the rotation center axis 8, but may be slightly deviated from the normal direction.

  The number of permanent magnets constituting the first tub wall rotor 41 may not be 16, and the permanent magnets may be arranged with a gap therebetween in close contact with the rotation direction of the washing tub 4. May be. However, it is desirable that the arrangement pitch of the core coils of the external stator 42 and the arrangement pitch of the permanent magnets of the first tank wall rotor 41 are matched. Moreover, you may make it the 1st tank wall rotor 41 arrange a U-shaped permanent magnet.

  The external stator 42 is composed of one or a plurality of core coils wound in a coil shape, and a current is passed through the core coil from an inverter 44 as an external drive circuit in the direction of the central axis of the core coil. A magnetic field can be generated. The external stator 42 is fixed to the housing 1 so that the center axis direction of the winding core coil is the normal direction of the rotation center axis 8. The direction of the magnetic field generated by the core coil constituting the external stator 42 is generally the normal direction of the rotation center axis 8, but may be slightly deviated from the normal direction. In addition, eight external stators 42 are divided and installed in two in the height direction (direction of the rotation center axis 8) at the four corners of the housing 1.

  The external stator 42 can be installed in such a manner that a plurality of core coils are installed in one place, the magnetic poles of a plurality of adjacent core coils are reversed, or a U-shaped core coil is used. There may be. Moreover, you may install in parts other than the four corners of the washing tub 4, and the number of installation may be more or less. Also, the number in the vertical direction may be one or more.

  The guide stator 43 does not spontaneously generate a magnetic field, but the magnetic field is induced according to Fleming's law by rotating the washing tub 4 provided with the first tank wall rotor 41 that generates the magnetic field. There is a coil in which a conductive wire is wound and arranged in the same manner as described in the description of the external stator 42 on the outer periphery of the washing tub 4.

  In addition, as the guide stator 43, one or a plurality of thin metal plates such as aluminum that do not generate magnetic force by themselves are arranged in a multilayer shape outside the washing tub 4 or plural in the rotation direction of the washing tub 4. It may be divided and arranged. In this case, when the first tank wall rotor 41 having a magnetic field rotates at high speed, an eddy current is locally induced in the metal thin plate to generate a magnetic force (repulsive force).

  Next, a method for rotating the washing tub will be described. When an electric current is passed from the inverter 44 as the drive circuit to the core coil of the external stator 42, a magnetic field is generated perpendicularly to the tank wall of the washing tub 4 around the central axis of the core coil, and this magnetic field is generated in the first tank. A force acts on the wall rotor 41 in the tangential direction of the washing tub 4 from Fleming's law, and the washing tub 4 can be rotated. The relationship between the external stator 42 and the first tank wall rotor 41 corresponds to the relationship between the stator and the rotor in the permanent magnet type synchronous motor, and the electric power to the external stator 42 for rotating the washing tub 4. The supply method and control method may be the same as those of the permanent magnet type synchronous motor. That is, by adjusting the frequency, current, voltage, or the like of AC power supplied to the external stator 42 by the inverter 44 as a drive circuit, it is possible to easily reverse the rotation direction or change the rotation speed.

  The external stator 42 may be supplied with a direct current, and by changing the direction of voltage or current or their values, the rotation direction can be reversed or the rotation speed can be easily changed as described above. It becomes. Furthermore, if the direction and the force of the magnetic force generated by the external stator 42 arranged at equal angles in the circumferential direction and the position facing each other with the washing tub 4 interposed therebetween are synchronized, the effect of suppressing the shaking of the washing tub 4 is also achieved. I can expect.

  Next, a method for levitating the washing tub 4 when the washing tub 4 is rotating will be described. Simultaneously with the rotation of the washing tub 4, a repulsive force due to a magnetic field is induced between the guide stator 43 and the first tub wall rotator 41 in the normal direction of the rotation center axis 8, and the washing tub 4 becomes a method of the rotation center axis 8. Acts to float in the line direction. If the direction of the center of the core coil of the external stator 42 and the direction of the magnetic field of the first tank wall rotor 41 are slightly shifted from the normal direction of the rotation center axis 8 rather than horizontal, the axial direction of the rotation center axis 8 It is also possible to gain buoyancy.

  Note that levitation using induced magnetic force does not occur unless the washing tub 4 rotates, so that it is necessary to be able to support the washing tub 4 from the outside of the washing tub 4 with wheels or bearings. However, it is desirable to leave an appropriate gap so that the wheels and bearings do not contact the washing tub 4 when the washing tub 4 rotates.

  In addition, although the induction magnetic force between the guide stator 43 and the first tank wall rotor 41 is used as a means for floating the washing tub 4, a permanent magnet is provided at the lower part of the washing tub 4 and further joined to the housing 1. Then, a permanent magnet with different poles may be provided and floated. In this case, the difference is that the washing tub 4 is always levitated regardless of the rotation and stop operation.

  In FIG. 4, the guide stator 43 is disposed at the lower part of the external stator 42, but may be disposed at the upper part or side part of the external stator 42 or between the external stator 42 and the washing tub 4. Good. When the guide stator 43 is a coil and is between the external stator 42 and the washing tub 4, the guide stator 43 and the center of the winding of the external stator 42 are shifted up and down and left and right to fix the external The interference between the magnetic force for driving by the child 42 and the magnetic field induced by the first tank wall rotor 41 may be reduced or used. Further, the guide stator 43 is a pair of coils with different winding directions, that is, an eight-shaped coil, and one side coil is installed on the upper side of the first tank wall rotor 41 to induce magnetic force. May be attracted, and the magnetic force induced to float the washing tub 4 may be generated by arranging the other side coil in the lower portion so that the induced magnetic force becomes repulsive. In this case, since the weight of the washing tub 4 can be reduced, the wear of the bearing 7 accompanying the rotation of the washing tub 4 can be further reduced.

When the guide stator 43 is a core coil, as shown in FIG. 7, the two guide stators 43 disposed at point-symmetrical positions around the rotation center axis of the washing tub 4 are one core. One end of the coil is connected to one end of the other core coil, and the other end of the other core coil is connected to the other end of the other core coil to form one coil. The connection between the guide stators 43 can be made by a conductive wire 45 made of the inner surface of the housing 1 or the like. By using one coil in this way, if the rotation of the washing tub 4 is deviated and biased to one side, a current flows through the conductive wire 45, and the repulsive force becomes stronger on the approaching stator 43 side, which is closer to it. On the other side of the guide stator 43, an attractive force acts (or a repulsive force becomes weak), and an effect of naturally suppressing blurring of the washing tub 4 occurs.
In such a washing machine, the difference in magnetic force generated in the guide stator disposed at a point-symmetrical position about the rotation center axis of the washing tub is in the normal direction of the rotation center axis during rotation of the rotation tub. Since the shaking of the washing tub is suppressed, a stable rotation with less swing is obtained, and the effect of suppressing noise and wear of the members during rotation of the rotating tub is increased.

  6 and 7, the external stator 42 and the guide stator 43 are installed at four locations on the outer periphery of the washing tub 4, but may be more or less. Moreover, you may arrange | position continuously concentrically with the 1st tank wall rotor 41. FIG.

  Next, a method for drying the laundry will be described. Here, the laundry is dried by electromagnetic induction heating. Since the tank wall of the washing tub 4 is made of stainless steel, a high-frequency (preferably several kHz or more) alternating current is generated using an inverter 44 as a drive circuit, and supplied to the external stator 42 to generate a high-frequency magnetic field. An eddy current is generated in the tank wall 4 and Joule heating occurs. At this time, it is desirable to dry while rotating the washing tub 4 so as not to locally heat the laundry.

Note that it may be separate from or shared with the inverter 44 as a drive circuit for rotationally driving the washing tub 4.
Needless to say, heating by electromagnetic induction may be used not only for drying the laundry, but also for raising the water temperature during washing to enhance the washing effect and for drying the washing tub 4 after washing.
Further, the supply destination of the high-frequency alternating current may not be the external stator 42, but may be another stator installed on the casing 1 side of the outer periphery of the washing tub 4, in which case the magnetic field generated from the stator is It may be perpendicular or parallel to the tub wall of the washing tub 4, and the degree of freedom in selecting the portion to be heated is increased. If the stator is divided, gentle heating can be easily performed over a wider range.
Moreover, the dehydrating plate 11 may be used as the part to be heated by electromagnetic induction. However, in this case, it is desirable that the tank wall of the washing tub 4 through which the high-frequency magnetic field passes is a member (such as a resin system) that does not block magnetic force even at least partially. Further, when the dehydrating plate 11 is heated, it is a part that is in direct contact with the laundry, so it is desirable that the heating temperature is not so high and is limited to about 60 ° C. at most. When the dehydrating plate 11 is provided and the tank wall of the washing tub 4 is heated, the temperature may be higher. When heating the tank wall of the washing tub 4 or the dehydrating plate 11, the surface is covered with an insulating material such as Teflon (registered trademark) or polyvinyl chloride in order to prevent leakage of eddy current into the washing tub 4. Also good.

  Further, a hot air heater is provided outside the washing tub 4 so as to circulate the hot air from the upper part of the washing tub 4 to the drain pipe 20 and through the gap between the washing tub 4 and the housing 1 to the upper part or vice versa. Or by heating the tank wall of the washing tub 4 by electromagnetic induction, and blowing or circulating air from the upper part of the washing tub 20 to the drain pipe 20 or in the opposite direction. A step of drying the laundry may be added. Further, the laundry may be dried by using the warm air circulation and electromagnetic induction heating together.

In such a washing machine, since the rotational driving force of the rotating tub and the supporting force in the axial direction and the normal direction of the rotation central axis of the rotating tub are obtained in a non-contact manner by repulsive force or attractive force consisting of magnetic force, The noise and the wear of the members can be suppressed, and the number of parts that come into contact can be reduced, and the service life of the rotating machine can be extended.
In addition, by arranging the tank rotating means so as to produce a similar magnetic force action at a point-symmetrical position around the rotation center axis of the rotation tank, the same magnetic force acts in the normal direction of the rotation center axis, The service life of the rotating machine can be further increased.
In addition, a current is induced in the guide stator with the rotation of the rotating tank, and a magnetic force generated according to the number of rotations of the rotating tank due to the interaction between the current and the magnetic field causes the rotating tank to move in the axial direction of the rotation center axis and Since it is supported in the normal direction, the rotation can be stabilized according to the number of rotations, and noise and member wear during rotation of the rotating tank can be suppressed.

  The effect of magnetic fields on organisms is described in Takahashi Fujio, “Magnetics and Biology”, 1984, in the publication of the Japan Society for the Science and Technology. Example of reduction to a growth rate of 70% in a triangular wave magnetic field of 300 Hz at 300 G, an example of inhibition by electromagnet 70 to 15 K and permanent magnet 4 to 900 G), improved hygiene due to bactericidal effect (2.2 kG per day for 1 hour treatment) Sterilization example of 1500G pulse electromagnet treatment), improvement of detergency due to enzyme reaction promotion effect (activity of hydrolyzing enzyme trypsin increased by 23% in 8kG heterogeneous magnetic field 220G / cm, oxidative complete enzyme catalase 60kG) The example shows an increase in activity up to 53%. From this, compared with the case where a motor is installed in the lower part of the washing tub shown in the conventional example, the inside of the washing tub 4 is a strong magnetic field, and the effect of improving hygiene is expected due to the effect of inhibiting and inhibiting the growth of bacterial cells. it can.

  On the contrary, for example, when a magnetic card or the like having magnetic information is intentionally or mistakenly washed, the magnetic force in the washing tub 4 should be weak, so that the tub wall of the washing tub 4 is shielded from the magnetic field. You may make it comprise a metal with a high property.

Embodiment 3.
FIG. 8 is a longitudinal sectional view of a washing machine according to Embodiment 3 of the present invention. FIG. 9 is a cross-sectional view of the washing machine of the third embodiment. FIG. 10 is a bird's-eye view of a part of the inside of the washing tub in the third embodiment. FIG. 11 is an enlarged schematic cross-sectional view between the stirring blade base and the washing tub of the third embodiment. 8 is a cross-sectional view taken along the line AA in FIG. 9, and FIG. 9 is a cross-sectional view taken along the line BB in FIG.
The washing machine of the third embodiment is the same as the washing machine of the second embodiment except for the method of attaching the stirring blades. Similar parts are denoted by the same reference numerals as those of the second embodiment, and description thereof is omitted.

  In the washing machine of the third embodiment, two types of stirring blades 50 and 51 are used. One stirring blade 50 is supported by a normal rotation synchronizing means 52 provided in the washing tub 4, and the other stirring blade 51 is supported by a normal rotation synchronizing means 53 provided on the side surface dewatering plate 12. Since these forward rotation synchronizing means 52 and 53 have the same structure only in the attachment place between the washing tub 4 and the side surface dewatering plate 12, only one forward rotation synchronizing means 52 will be described. The normal rotation synchronizing means 52 includes a stirrer blade base 54 that has a stirring blade 50 fixed to the inside of the washing tub 4 and is rotatable in an annular manner in the washing tub 4, and a stirring blade base 54 that rotates in an annular shape. A stirrer blade support member 55 for supporting the rotation center axis 8 so as not to deviate, a telescopic claw 56 provided on the stirrer blade base 54 as shown in FIG. 11, a telescopic spring 57 for expanding and contracting the telescopic claw 56, It has a protrusion 58 provided on the inner surface side of the washing tub 4 and a claw 58 provided in accordance with the rotating position of the stirring blade base 54. The normal rotation synchronizing means 52 and 53 are means for synchronizing so that the stirring blades 50 and 51 rotate in the same direction as the washing tub 4.

  Further, two stirring blade bases 54 that rotate in the washing tub 4 annularly are installed in the axial direction (up and down) of the rotation center shaft 8. The upper stirring blade base 54 rotates on the inner surface of the washing tub 4, and the lower stirring blade base 54 moves on the inner surface of the side surface dewatering plate 12 mounted on the inner surface of the washing tub 4. Rotate.

  The expansion / contraction claw 56 is on the contact surface side of the stirring blade base 54 and the washing tub 4 and normally protrudes from the surface of the stirring blade base 54 by the action of the expansion / contraction spring 57. 57 is contracted and accommodated in the stirring blade base 54. In FIG. 11, the direction in which the operation is performed from right to left is the positive mode.

  In addition, the stirring blades 50 and 51 are fixed to the respective stirring blade bases 54 in the circumferential direction of the washing tub 20 at four locations. The upper stirring blade 50 has a triangular prism shape, and the lower stirring blade 51 has a washing tub. 4 is a flat plate attached at an angle with respect to the rotational surface of 4 and has a streamlined cross section.

  In addition, the stirring blade support member 55 is annularly fixed to the tank wall or the side surface dewatering plate 12 of the washing tub 4 so as to sandwich the stirring blade base 54 from above and below. Since either one or both of the stirring blade base 54 and the stirring blade support member 55 are provided with wheels, the rotation of the stirring blade base 54 becomes smooth. In addition, it is not restricted to a wheel, What is necessary is just to make sliding smoothly.

Further, the side surface dewatering plate 12 is divided into two parts on the upper side and the lower side with the stirring blade base 54 on the upper side interposed therebetween, and is divided into four parts with the same shape in the circumferential direction of the rotating surface of the washing tub 4.
Further, the bottom dewatering plate 13 has a conical shape with the periphery of the rotation center axis 8 as a vertex, and is divided into three in the same fan shape. Note that both the side surface dewatering plate 12 and the bottom portion dewatering plate 13 may be more or less divided, and may not be divided into the same shape.

  Next, the tub rotating means 59 of the washing machine of the third embodiment is built in each of a stirring blade base 54 installed on the inner surface of the washing tub 4 and a stirring blade base 54 arranged on the side surface dewatering plate 12. The first tank wall rotor 41, the external stator 42 disposed in the vicinity of the first tank wall rotor 41, and the second tank wall fixed to the upper outer surface of the washing tub 4 It has a rotor 46, a guide stator 43 disposed in the vicinity of the second tank wall rotor 46, and an inverter 44 as a drive circuit for driving the external stator 42. The first tank wall rotor 41, the external stator 42, the guide stator 43, and the inverter 44 as a drive circuit are the same as those in the second embodiment. The second tank wall rotor 46 is the same as the first tank wall rotor 41.

In addition, the stirring blade base 54 may be divided into a plurality of parts in the rotation direction of the washing tub 4 and may be rotated with the ends connected at the time of rotation. The bottom dewatering plate 13 is also provided with an annular stirrer base provided with a stirrer blade and an outer stator arranged continuously (or partly) annularly on the casing 1 side across the bottom of the tank wall. The stirring blade base may be rotationally driven from the side.
In addition, the inner surface of the tub wall, the side surface dewatering plate 12 and the bottom dewatering plate 13 of the washing tub 4 are fixed to other than the stirring blades rotating separately from the rotation of the washing tub 4 as described above (with the rotation of the washing tub 4). A rotating stirring blade may be provided.
Further, the shape of the stirring blades 50 and 51 may be other than the above, and the stirring blades 50 and 51 having different shapes may be mixed in one stirring blade base 54.
Further, the number of attached stirring blades 50 and 51 in the rotation direction of the washing tub 4 may be other than the above.

Next, the operation will be described. Note that portions that are the same as those in the first and second embodiments are omitted, and only different points will be described.
In the positive mode, when a current is passed through the core coil of the external stator 42, a magnetic field is generated around the coil, and this magnetic field acts on the first tank wall rotor 41 fixed to the stirring blade base 54. Due to Fleming's law, a force that moves the stirring blade base 54 in the tangential direction works. As a result, the stirring blade base 54 rotates, and eventually the expansion / contraction claw 56 hits the claw 58, and the washing tub 4 and the stirring blade base 54 rotate together with the expansion / contraction claw 56 pushing the claw 58. . When the washing tub 4 rotates, the first tub wall rotator 41 on the upper part of the washing tub 4 also rotates. Therefore, according to Fleming's law, the first tub wall rotator 41 on the outer peripheral surface of the upper part of the washing tub 4 and the washing tub 4 A repulsive force due to a magnetic force is induced in the normal direction of the rotation center shaft 8 between the external guide stator 43 and the washing tub 4 acts to float in the normal direction of the rotation center shaft 8.

  In the reverse mode, the stirring blade base 54 moves to the right in FIG. 11, and the expansion / contraction claw 56 eventually hits the claw 58 as in the normal mode. Since it is housed in the stirring blade base 54, almost no force acts on the washing tub 4, only the stirring blade base 54 rotates, and the washing tub 4 does not rotate. The stirring blade base 54 is installed at two locations on the upper side and the lower side, and the above operation is an operation when the two sites rotate forward or backward at the same time, but one side is normal and the other side is reverse. In this case, while the washing tub 4 is rotated forward, one stirring blade base 54 is in a reverse rotation state. In addition, it is possible to easily replace the agitating blade base 54 that is rotating in the reverse direction regularly between the upper side and the lower side.

  At the time of dewatering, the washing tub 4 may be rotated at a high speed by driving the two stirring blade bases 54 and adjusting the frequency of the inverter 44 as a drive circuit. At this time, since the rotational load is small, only the stirring blade base 54 on one side may be driven, and the other side may be hardly rotated.

  Such a washing machine can create more complex water streams during washing and rinsing operations.

In the third embodiment, the washing tub 4 is rotated indirectly by rotating the stirring blade base 54. However, as in the second embodiment, the washing tub 4 is directly rotated and driven. The tank wall rotor 41 and the external stator 42 may be provided separately.
In the third embodiment, the first tub wall rotor 41 made of a permanent magnet is fixed to the outer peripheral surface of the washing tub 4, and the guide stator 43 is fixed to the outside of the washing tub 4. 4, the guide stator 43 may be fixed to the outside of the washing tub 4, and the first tank wall rotor 41 made of a permanent magnet may be fixed to the outside. Further, at this time, the tank wall of the washing tub 4 may be made of stainless steel, aluminum, or the like, and the guide stator 43 may also be used. In this case, the washing tub 4 can be reduced in weight to reduce rotational power, or an eddy current can flow through the washing tub 4 that also serves as the guide stator 43, so that the temperature inside the washing tub 4 can be raised and the water temperature rises. As a result, the cleaning effect can be improved and the heat source for drying can be used.
In Embodiment 3, the expansion / contraction claw 56 is provided in the stirring blade base 54 and the claw 58 is provided in the washing tub 4, but the claw 58 is provided in the stirring wing base 54 and the expansion / contraction claw 56 is provided in the washing tub 4. You may do it.

Embodiment 4.
FIG. 12 is a local enlarged cross-sectional view of a tub wall of a washing tub of a washing machine according to Embodiment 4 of the present invention. FIG. 13 is a vertical sectional view of the first tank wall rotor of the washing machine of the fourth embodiment.
The magnetic field directions of the first tank wall rotor and the external stator of the fourth embodiment are different from those of the second embodiment, and the others are the same. Similar parts are denoted by the same reference numerals, and description thereof is omitted.

  In the fourth embodiment, the magnetic field directions of the external stator 60 and the first tank wall rotor 61 are parallel to the tank wall of the washing tub 4. The first tub wall rotor 61 is fixed to the outer peripheral surface of the tub wall of the washing tub 4 so that the magnetic field direction is in the axial direction of the rotation center shaft 8. Moreover, the 1st tank wall rotor 61 is divided | segmented and divided into 16 in the circumferential direction. The external stator 60 is fixed to, for example, the housing 1 outside the washing tub 4 on the lower side in the axial direction of the rotation center shaft 8 with respect to the first tank wall rotor 61. The magnetic field direction of the external stator 60 is the axial direction of the rotation center axis 8. The magnetic field direction of both the external stator 60 and the first tank wall rotor 61 may be slightly deviated from the axial direction of the rotation center axis 8.

In such a washing machine, since the magnetic field direction is the axial direction, the inside of the washing tub 4 is unlikely to be a strong magnetic field. For example, when a magnetic card or the like having magnetic information is intentionally or mistakenly washed, It is difficult to erase the magnetic information.
Further, by arranging the external stator 60 and the first tank wall rotor 61 as described above, the external stator 60 and the first tank 60 can be arranged without increasing the space between the washing tub 4 and the housing 1 so much. It is easy to increase the thickness of the tank wall rotor 61 in the magnetic field direction.

In the fourth embodiment, the first tank wall rotor 61 is installed above the external stator 60, but the first tank wall rotor 61 is arranged below the external stator 60. May be. Further, the first tank wall rotor 61 may be installed above and below the external stator 60. At this time, the magnetic field directions of the upper and lower first tank wall rotors 61 on the same axis direction of the rotation center shaft 8 are reversed. Moreover, you may make it install the external stator 60 on the upper and lower sides of the 1st tank wall rotor 61. As shown in FIG. At this time, the excitation directions of the upper and lower external stators 60 on the same axis direction of the rotation center shaft 8 are reversed.
Further, a guide stator is disposed between the external stator 60 and the first tank wall rotor 61 so as to be fixed to the housing 1, or a guide stator is disposed in place of the external stator 60. Also good. The guide stator is disposed so as to be sandwiched between the first tank wall rotors 61, and the upper and lower guide stators are connected so as to generate a magnetic field in the same direction. The child 61 can be easily made repulsive, and a force for efficiently levitating the washing tub 4 can be obtained.

  The washing tub may be divided into a plurality of child washing tubs in the axial direction of the rotation center axis, and a rotation unit as in the above embodiment may be provided for each to drive the rotation of each child washing tub. . Give relatively different rotations (rotation speed, rotation direction, etc.) to each child washing tub (There may be child washing tubs that do not rotate by pressing them physically or magnetically from the outside of the tub wall) This makes it possible to easily generate a more complicated water flow in the washing tub during washing.

  Moreover, in the said embodiment, it is set as the washing machine which does not provide a dehydration hole in the tank wall of a washing tub, and does not require an external water tank outside the washing tub, However, It is not this limitation. That is, what provided the dehydration hole and the outer water tank may be used. However, especially in this case, when the motor, external stator, or guide stator is in contact with water, the motor, external stator, or guide stator is covered with an insulating material such as resin or insulator or placed in a container. It is necessary to take measures and insulation measures. Furthermore, it is preferable that the external stator or the guide stator be a member that does not block the magnetic field when watertight or insulating treatment is performed. In addition, when the washing tub is rotationally driven or supported by the magnetic force from the outside of the outer tub, the gap between the first tub wall rotor of the washing tub and the outer tub should be kept as small as possible, It is desirable to suppress the attenuation of magnetic force by making the material non-blocking.

  In the above embodiment, the washing tub is driven to rotate by the tub wall rotating means, but a conventional rotating means may be provided. In this way, at least the rotating means may have a smaller capacity than before, and the rotating means can be reduced in size and dead space can be reduced. Moreover, the washing machine equipped with the conventional stirring blade and its rotation means in the bottom part of the washing tub may be sufficient.

  Moreover, in the said embodiment, although the rotation center axis | shaft is set as the washing machine of the substantially perpendicular | vertical direction, the washing machine provided with the washing tub which has arrange | positioned the rotation center axis | shaft in the substantially horizontal direction may be used. However, in this case, it is desirable that the washing machine has a dewatering hole on the tank wall of the washing tub and includes an external water tub outside the washing tub.

It is a longitudinal cross-sectional view of the washing machine concerning Embodiment 1 of this invention. It is a cross-sectional view of the washing machine according to the first embodiment. It is a cross-sectional schematic diagram explaining the relationship between the spin-drying | dehydration board of this washing machine of Embodiment 1, and a washing tub. It is a longitudinal cross-sectional view of the washing machine concerning Embodiment 2 of this invention. It is a cross-sectional view of the washing machine according to the second embodiment. It is a cross-sectional view which shows the relationship between the 1st tank wall rotor of this washing machine of Embodiment 2, and an external stator. It is a cross-sectional view which shows the other relationship between the 1st tank wall rotor of this washing machine of Embodiment 2, and an external stator. It is a longitudinal cross-sectional view of the washing machine concerning Embodiment 3 of this invention. It is a cross-sectional view of the washing machine according to the third embodiment. It is a bird's-eye view inside the washing tub of the washing machine of this Embodiment 3. It is an expanded cross-sectional schematic diagram of the part which shows the normal rotation synchronization means which comprises the washing machine of this Embodiment 3. It is an expanded cross-sectional schematic diagram of the part which shows the tank wall rotation means of the washing machine concerning Embodiment 4 of this invention. It is a cross-sectional view in the 1st tank wall rotor part of the washing machine of this Embodiment 4.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Case, 2 Bottom plate, 3 Outer lid, 4 Washing tub, 5 (Laundry tub) side part, 6 (Laundry tub) bottom part, 7 Bearing, 8 Rotation center axis, 9 Inner lid, 10a, 10b Rotation transmission part , 11 Dewatering plate, 12 Side surface dewatering plate, 13 Bottom dewatering plate, 14 Dewatering hole, 15 Dewatering plate leg, 16 Suction cup, 17 Water passage, 18 Dewatering groove, 19, 50, 51 Stirring blade, 20 Drain pipe, 21 Drainage Valve, 22 Drainage tank, 23 Drainage discharge pipe, 24 Water level sensor, 30, 40, 59 Tank rotation means, 31 Power shaft, 32 Motor, 33 Rotation conduction roller, 34, 44 Inverter, 41, 61 First tank wall rotation 42, 60 External stator, 43 Guide stator, 45 Conductor, 46 Second tank wall rotor, 52, 53 Forward rotation synchronizing means, 54 Stirring blade base, 55 Stirring blade support, 56 Telescopic claw, 57 Telescopic spring, 58 pcs .

Claims (7)

In a rotating machine equipped with a rotatable cylindrical rotating tub that accommodates a workpiece,
A rotating machine comprising tank rotating means for rotating a rotating tank by applying a force in a rotating direction to a tank side wall of the rotating tank. The tank rotating means is
A motor having a rotation transmitting member in contact with the outside of the tank side wall;
A drive circuit for driving the motor;
The rotating machine according to claim 1, comprising: The tank rotating means is
A plurality of first tank wall rotors made of permanent magnets disposed on the tank side wall;
A plurality of external stators arranged on the outside of the rotating tub so as to be close to the first tank wall rotator, and comprising a core coil that constitutes a motor together with the plurality of first tank wall rotators;
A drive circuit for exciting the external stator to rotate the rotating tank;
The rotating machine according to claim 1, comprising:   A guide stator comprising a conductor disposed outside the rotary tank and between the external stator and at a position displaced from the external stator so as to be close to the first tank wall rotor is provided. The rotating machine according to claim 3.   Each of the guide stators is composed of a core coil, and the windings of a pair of the core coils disposed symmetrically about the rotation center axis of the rotating tub are connected in a loop. The rotating machine according to claim 4, characterized in that: In a rotating machine equipped with a rotatable cylindrical rotating tub that accommodates a workpiece,
A stirring blade that is rotatably supported in the rotation direction of the rotary tank inside the rotary tank;
A plurality of first tank wall rotors composed of permanent magnets provided on the stirring blade so as to rotate with the stirring blade;
A plurality of external stators arranged on the outside of the rotating tub so as to be close to the first tank wall rotator and comprising a core coil that constitutes a motor together with the first tank wall rotator;
A drive circuit for exciting the external stator so as to rotate the stirring blade;
A plurality of second tank wall rotors made of permanent magnets disposed on the tank side wall;
A guide stator made of a conductor disposed outside the rotary tank so as to be close to the second tank wall rotor;
A rotating machine characterized by comprising:   7. The rotating machine according to claim 3, wherein the first tank wall rotor and the external stator are in a position where they are moved up and down in the direction of the rotation center axis of the rotary tank.

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