JP2020104027A - Stirrer - Google Patents

Abstract

To obtain a stirrer which is suitable for making food, and generates less noise during driving and in which liquid to be stirred hardly leaks from a stirring tub part, a driving part can be reduced in size and weight and further which is hardly improperly operated even when used for long time.SOLUTION: A stirrer comprises: a stirring container part comprising a stirring tub part for holding an object to be stirred therein and a magnetic contact part at a bottom part of the stirring tub part; and a stirring bar holding part comprising a stirring bar arranged inside the stirring tub part that is turned at a turning part comprising a magnet part in a rotary magnetic field generated in a turning/driving part of a main body part. The turning/driving part comprises a number of coil groups and inductive magnetic field control means that controls the coil groups so that the rotary magnetic filed is induced and controlled. Respective coils of the coil group are arranged in a direction in which an inductive magnetic field confronting the turning part, and the stirring container part and the stirring bar holding part are arranged to be attachable to and detachable from the main body part of the stirrer.SELECTED DRAWING: Figure 5

Description

The present invention relates to a stirrer in which a rotating part of a stirring bar holding part in a stirring container part and a rotating part driving part of a main body part outside the stirring container part are arranged via a magnetic contact part, and in particular, The present invention relates to a stirrer that can be used for food production by making the stirring tub part removable.

Sheet-like wall coverings made of various materials, so-called wallpaper, is attached to the wall surface as the interior finish of the building. Usually, in the construction of this wallpaper, glue is applied to the back surface of the wallpaper at the site, and the wallpaper is sequentially attached to the wall surface. BACKGROUND ART Conventionally, a wallpaper gluing machine has been used to apply glue to wallpaper. This wallpaper sizing machine has multiple rolls and glue tubs inside the main body, and while the wall coverings drawn from the rear of the main body are sent forward by various internal rolls, the back side of the wall coverings contacts the sizing roll in the middle. By doing so, the glue in the glue tub is applied.

As a conventional glue liquid preparation device, a rotating shaft equipped with a stirrer is projected on the bottom surface of a container for holding the paste material and water, and a gear or belt is provided by an electric motor arranged inside the base at the bottom of the container. A stirrer for adjusting the paste by rotating the stirrer of the rotating shaft via the stirrer has been already on the market. However, in this conventional stirring device, the shielding effect of the O-ring and the rubber packing that shield is remarkably reduced, and the glue liquid of the agitated substance leaks from the shield portion between the rotating shaft and the container that penetrates the container. There was a chance that This is because if the inside of the container dries after being used without being thoroughly washed, the O-ring and the rubber packing also contract due to the contraction of the glue liquid adhering to the shield between the rotating shaft and the container due to drying. This is because the glue liquid leaks from the contracted shield portion between the container and the container.

Leakage of glue from the container to the inside of the base may interfere with the meshing of gears and belts, leading to malfunctions, and in the worst case, an electric drive system such as an electric motor may short-circuit. .. Therefore, a device in which the drive source is arranged above the container can be considered, but the center of gravity of the device itself becomes high, resulting in a defect of lack of stability. Further, if the base itself is made heavy in consideration of stability, the device itself becomes heavy in combination with the drive source above, which may hinder the arrangement on site. Further, the mechanism for transmitting the rotation of the electric motor to the stirrer via the gear and the belt causes a large noise during driving.

Therefore, the applicant of the present invention has proposed a stirrer that eliminates the rotary shaft that penetrates the container (see Patent Document 1 and Patent Document 2). In these stirrers, a stirrer holding unit including a rotating means such as a turntable that rotates according to the displacement of the rotating magnetic field and a rotating shaft of the rotating means is arranged on the bottom surface in the trough, A rotor drive unit for generating a rotating magnetic field having a center of rotation on a rotating shaft of a rotating unit is arranged below a bottom surface of the trough, and a rotating shaft of an agitator holding unit in the trough is generated by a rotating magnetic field of the rotor driving unit. To rotate.

JP, 2007-89249, A JP, 2018-1113, A

However, in Patent Document 1, there is a problem in that the apparatus itself becomes heavy because a large number of magnets serving as a rotating unit must be used. Further, there is a problem that the device becomes large because the magnet and the coil group have to be arranged on a wide surface. Further, since the rotating shaft is provided on the turntable of the stirring bar holding unit, the rotating shaft may be shaken during driving, which may cause a failure or a noise.

Further, in Patent Document 1 and Patent Document 2, when the magnet is driven by the coil group, it is necessary to switch the current flowing through the coil group at high speed, and therefore the resistance or the like generates heat. When used for a long period of time, the heat generated may adversely affect the control system, resulting in stoppage or malfunction.

Further, in Patent Document 2, the stirring container cannot be removed from the base of the stirrer, and the stirred liquid inside is discharged from the discharge port formed at the bottom of the stirring container. In this case, due to problems such as cleaning the inside of the discharge port, it is not suitable for food production, and it is necessary to make improvements suitable for food production.

INDUSTRIAL APPLICABILITY The present invention is also suitable for manufacturing foods, has less noise during driving, less leakage of liquid to be stirred from the stirring trough, can reduce the size of the driving unit itself, and can be used for a long time. However, the aim is to obtain a stirrer that rarely malfunctions.

The stirrer according to the invention described in claim 1 has a stirring tub part for holding an object to be stirred therein, and a part of a bottom part of the stirring tub part at a predetermined position at the bottom part of the stirring tub part. An agitating vessel part provided with a magnetic contact part standing upright in the upper direction or the lower direction,
An agitator arranged inside the agitating trough, and a magnet part in which N poles and S poles are alternately arranged around an axis of the agitator holding portion for rotating the agitator around an axis An agitator holding part including a rotating part,
A main body part having a rotating part driving part for generating a rotating magnetic field facing the rotating part of the stirring bar holding part;
In a stirrer in which a rotating part of the stirring bar holding part in the stirring container part via the magnetic contact part and a rotating part driving part of the main body part outside the stirring container part are arranged,
The rotating part driving part controls the energization of each of the coil part and the coil part in which a large number of concentric coil groups are arranged annularly so as to face the rotating part of the stirring bar holding part. An induction magnetic field control means for inductively controlling the rotating magnetic field,
Each coil of the coil group is arranged in a direction for generating an induction magnetic field facing the rotating portion,
It is characterized in that the agitating container part is detachably arranged together with the agitator holding part with respect to the main body part of the agitator.

In the stirrer according to the invention described in claim 2, the magnetic contact portion which is erected in the lower direction with respect to the bottom of the stirring tub portion according to claim 1 is provided around the axis of the stirring bar holding portion. It is characterized in that it is provided with a support portion for fitting and supporting the lower end portion, and an enlarged diameter portion for loosely fitting the rotating portion of the stirring bar holding portion inside.

In the stirrer according to the invention described in claim 3, the rotating part drive part according to claim 1 is provided in a recess of the magnetic contact part that is erected in an upward direction with respect to a bottom part of the stirring trough part. Placed,
The rotating part of the stirring bar holding part is arranged around the side wall of the magnetic contact part.

The stirrer according to the invention described in claim 4 is characterized by further comprising a heat dissipation means for diffusing the heat generated by the rotation of the rotating part according to claim 2 or 3.

In the stirrer according to the invention described in claim 5, the heat dissipating means according to claim 4 is provided in the heat conductive bracket disposed on the stirring trough side of the rotating part and the heat conductive bracket. The rotating part heat radiating means is provided with the stirring bar for supplying a stirring flow.

In the stirrer according to the invention described in claim 6, the heat radiation means according to claim 4 or 5 is an air cooling heat sink arranged in the rotating portion drive section, and a blowing means for blowing air to the air cooling heat sink. It is characterized in that it is a drive unit heat radiation means provided with.

INDUSTRIAL APPLICABILITY The present invention is also suitable for food production, has less noise during driving, does not leak the liquid to be stirred from the container, can reduce the size and weight of the driving unit itself, and malfunctions even after long-term use. There is an effect that it is possible to obtain a stirrer which is less likely to do.

It is a front view which shows the structure of one Example of the stirrer of this invention. It is a top view which removed the sealing lid of FIG. It is a bottom view of FIG. FIG. 2 is a side sectional view of FIG. 1. It is a disassembled perspective view of the agitator of FIG. It is explanatory drawing of the stirring container part of FIG. 1, a figure is a side sectional drawing, b figure is a perspective view, c figure is a sectional perspective view. It is explanatory drawing which shows the structure of the principal part of FIG. 1, a figure is a front view, b figure is sectional drawing of a figure. It is explanatory drawing which shows the structure of the stirring bar of the stirring bar holding part of FIG. 1, a figure is a top view, b figure is a perspective view, and c figure is a front view. It is a top view which shows the structure of another Example of the stirrer of this invention. It is sectional drawing of FIG. It is sectional drawing which shows the structure of the principal part of FIG.

In the present invention, a stirring tub part for holding an object to be stirred is provided inside, and a part of the bottom part of the stirring tub part is erected upward or downward with respect to the bottom part of the stirring tub part. And a magnetic stirrer provided with a magnetic contact portion, a stirrer disposed inside the stirrer, and an N pole and an S pole about the axis of the stirrer holder that rotates the stirrer about the axis. The stirrer holding section was provided with a rotating section having magnet sections in which poles were alternately arranged, and a rotating section drive section that opposed the rotating section of the stirrer holding section and generates a rotating magnetic field. It is a stirrer in which a main body portion, a rotating portion of a stirring bar holding portion inside the stirring container portion via a magnetic contact portion, and a rotating portion drive portion of the main body portion outside the stirring container portion are arranged.

The rotating part driving part controls the rotating magnetic field by controlling the energization of each of the coil parts in which a large number of coil groups are concentrically arranged in an annular shape so as to face the rotating part of the stirring bar holding part. And induction magnetic field control means for performing induction control. Further, each coil of the coil group is arranged in a direction in which an induced magnetic field facing the rotating portion is generated.

In such an agitator, the agitating vessel part is detachably arranged with respect to the main body part of the agitator together with the agitator holding part. Therefore, it is also suitable for food production, there is little noise during driving, the liquid to be stirred does not leak from the container, the driving unit itself can be made small and lightweight, and malfunctions even after long-term use There are few advantages.

As the stirring container part of the present invention, a stirring tub part and a magnetic contact part which is erected upward or downward with respect to the bottom part of the stirring tub part at a predetermined position of a part of the bottom part of the stirring tub part. It suffices as long as it is provided with and, as long as the liquid inside does not leak outside. The magnetic contact portion of the present invention may be one that is erected in the upper direction or the lower direction with respect to the bottom of the stirring tub. The stirring tub portion and the magnetic contact portion may be formed of the same stainless steel container, or may be a combination of respective members. When connecting the respective members, it is possible to sufficiently stop the water by interposing a shield member such as an O-ring or rubber packing. Incidentally, the opening of the magnetic contact portion is more preferably formed substantially at the center of the bottom of the stirring tub so that the stirring by the rotation of the stirrer can be performed uniformly and efficiently.

As the stirring container part of the present invention, a stirring tub part for holding an object to be stirred therein and a part of the bottom part of the stirring tub part at a predetermined position are directed upward or downward with respect to the bottom part of the stirring tub part. It is only necessary to have a magnetic contact part standing upright in the direction, and since this stirring container part can be removed from the stirrer main body, it becomes easy to wash the inside of the container, and it can be used for food production. Would also be suitable. The stirring container part of the present invention is not limited as to the material as long as it can maintain the cleaning property, but since it can be sterilized and the like, it is made of metal, in particular, stainless steel which does not cause rust. This makes it more suitable for food production.

In addition, since the stirring container section is made of stainless steel, the rotating magnetic field of the rotating section driving section does not cause a problem of excessive heat generation due to an eddy current. A sensor for detecting the position of the north pole or south pole of the magnet part of the rotating part of the stirring bar holding part in the stirring container part via the is arranged. Safety measures may be taken to control the induction of the corresponding rotating magnetic field. Further, the stirring tub portion of the stirring container portion and the magnetic contact portion may be separable, and only the magnetic contact portion may be made of ceramic or resin so that the eddy current itself is not generated.

The magnetic contact portion may be one that is erected in an upper direction or a lower direction with respect to the bottom of the stirring tub at a predetermined position on a part of the bottom of the stirring tub. That is, it is disclosed that either the projection is provided downward from the bottom surface of the stirring trough or the projection is provided upward from the bottom surface of the stirring trough. First, when the magnetic contact part is erected downward from the bottom of the stirring tub, the magnetic contact part fits and supports the lower end around the axis of the stirring bar holding part, and the stirring bar. And a diametrical expansion portion in which the rotating portion of the holding portion is loosely fitted. Next, when it is erected in the upper direction with respect to the bottom of the stirring tub, the rotating part driving part is arranged in the concave part of the magnetic contact part, and the rotating part of the stirring bar holding part is arranged in the magnetic contact part. It is arranged around the side wall of the section. As a result, the rotating portion that rotates the stirrer about its axis is held in the object to be stirred inside the stirring tub, so that noise during driving is small.

Further, the rotating portion driving portion for driving the stirring bar holding portion is arranged to face the rotating portion via the magnetic contact portion, and in order to drive the rotating portion, the rotating portion and the rotating portion driving portion are provided. Can be made smaller and lighter in weight. More preferably, the rotating part includes a magnet part in which N poles and S poles are alternately arranged around the axis of the rotating shaft, and the rotating part drive part faces the rotating part and is concentrically arranged in a large number. Since a coil portion in which the coil group is arranged in a tubular shape and an induction magnetic field control means for inducing control of the rotating magnetic field by controlling the energization of each of the multiple coil groups are provided, it is large enough to substantially cover the magnetic contact portion. The drive portion is thus formed. Therefore, the drive unit itself can be made small and lightweight.

In the stirring tub portion of the stirring container portion of the present invention, the size of the upper opening portion and the size of the bottom portion where the opening portion of the lower holding cup portion is formed may be the same, but the bottom portion may be the same. By making the shape smaller and making the opening larger, uneven stirring inside is eliminated.

The rotating unit of the present invention may be any unit that faces the rotating magnetic field of the rotating unit driving unit and rotates according to the displacement of the rotating magnetic field. Therefore, if the magnetic attraction is possible, it rotates according to the displacement of the rotating magnetic field. As a more preferable aspect, a magnet unit is provided in which N poles and S poles are alternately arranged around the axis of the rotating shaft so that the loss of torque according to the displacement of the rotating magnetic field is small. It is preferable that the magnet generate a strong magnetic field from the viewpoint of torque. For example, neodymium, samacoba rare earth magnet, ferrite or the like is used.

The stirrer holding part of the present invention includes a rotating part that rotates according to the displacement of a rotating magnetic field, a rotating shaft around the rotating part, and a stirring bar arranged at the upper end of the rotating shaft. It is sufficient to have and, and there is no electrical connection. Therefore, as a matter of course, the stir piece holding portion itself does not have a fear of electric leakage. Further, since the rotating rotary shaft and the stirring bar are held in the liquid to be stirred, there is an advantage that noise during driving is small.

Further, the rotating portion drive portion may be any one that generates a rotating magnetic field having a rotation center on the rotating shaft of the facing rotating portion. For example, a large number of magnetic field facing the rotating portion may be used. The permanent magnet may be arranged in the cylindrical body in the direction of the axis of rotation and the cylindrical body may be rotated by an electric motor. There is no noise in the moving part driving part itself, and assuming that an electric device with less noise is obtained, the rotating part driving part faces the rotating part and concentrically forms a large number of coil groups into a cylindrical or flat plate shape. An induction magnetic field control unit that includes a coil unit arranged as a ring and an induction magnetic field control unit that induces and controls a rotating magnetic field by controlling energization of each of a large number of coil groups, and each coil of the coil group faces the rotation unit. Are arranged in the direction of generating.

The induction magnetic field control means may perform PWM control of electric power supplied to each coil group. In normal PWM control, the position of the magnetic field is detected, and the amount of current flowing through each coil is controlled according to the designated rotation speed. The current waveform includes rectangular wave drive and sine wave drive, but either drive may be used.

In the stirrer of the present invention, a rotating part of the stirring bar holding part in the stirring container part and a rotating part driving part of the main body part outside the stirring container part are arranged via the magnetic contact part. It is a stirrer. More specifically, a stirring tub portion for holding an object to be stirred therein, and a part of the bottom portion of the stirring tub portion at a predetermined position are moved upward or downward with respect to the bottom portion of the stirring tub portion. And an upright magnetic contact portion. When the magnetic contact portion is erected in a downward direction with respect to the bottom portion of the stirring tub portion, the magnetic contact portion, a support portion that fits and supports the lower end portion around the axis of the stirring bar holding portion, The rotating member of the stirring bar holding portion is provided with an enlarged diameter portion that is loosely fitted inside. Also, when the stirring tub is erected upward from the bottom of the stirring tub, the rotating part driving part is arranged in the recess of the magnetic contact part, and the rotating part of the stirring bar holding part is arranged in the magnetic contact part. It is located around the side wall. As a result, there is no fear of malfunction or noise due to the driving of the gears.

Further, since the rotating part of the stirring bar holding part inside the stirring container part and the rotating part driving part of the main body part outside the stirring container part are arranged via the magnetic contact part, the coil of the rotating part driving part is arranged. Regarding the distance between the group and the rotating part of the stirring bar holding part, the magnet part of the rotating part may be a strong magnet and the number of magnets (the number of poles) may be increased to make a gap of about 10 mm. It will be possible. However, torque loss is reduced by making the gap as small as possible. Therefore, the stronger the magnet part of the rotating part is, and the smaller the gap between the magnet part and the coil part of the rotating part driving part is, the smaller the size of the drive system itself can be achieved, and the lighter weight and quieter operation can be achieved. Further progress. Therefore, the gap between the magnet portion and the coil portion is preferably 5 mm or less, more preferably 3 mm or less, and further preferably 2 mm or less.

Further, in the present invention, more preferably, a heat dissipation means for diffusing heat generated by the rotation of the rotating portion is further provided. As a result, it is possible to obtain a stirrer that has less noise during driving, does not leak the liquid to be stirred from the container, can reduce the size of the driving unit itself, and can reduce the weight, and that does not malfunction even during long-term use. it can.

The heat radiating means of the present invention may be either one that dissipates the heat generated by the rotating part drive part from the rotating part drive part or one that dissipates the heat generated by the rotating part from the rotating part. Good. That is, the heat radiating means is a drive heat radiating means provided with an air-cooling heat sink arranged on the outer wall of the rotating portion drive portion and a blowing means for blowing air to the air cooling heat sink, and the stirring tub of the rotating portion. It is preferable that the heat dissipating means is a rotating part provided with a heat conductive bracket arranged on the side of the section and the stirring bar for supplying a stirring flow to the heat conductive bracket.

The stirrer of the present invention may be any one as long as it mixes the objects to be stirred held in the stirring tub by rotation. It refers to one in which a plurality of plate-shaped or rod-shaped members are evenly arranged around the rotation axis. In addition, the plate-shaped member includes a member arranged horizontally, vertically, obliquely, or curved with respect to the rotation direction, and includes a member whose tip portion is bent. The rod-shaped member includes a member arranged at a right angle to the rotation axis and inclined, and includes a member whose tip portion is bent. In particular, the stirrer is formed diagonally downward with respect to the rotating shaft for supplying the stirring flow to the heat conductive bracket, in addition to the two stirring blade pieces that are raised obliquely upward with respect to the rotating shaft. By providing the two small stirring blade pieces, the heat generated in the rotating portion can be satisfactorily diffused from the rotating portion.

FIG. 1 is a front view showing the configuration of an embodiment of the stirrer of the present invention. FIG. 2 is a plan view excluding the sealing lid of FIG. FIG. 3 is a bottom view of FIG. FIG. 4 is a side sectional view of FIG. FIG. 5 is an exploded perspective view of the agitator of FIG. 6A and 6B are explanatory views of the stirring container portion of FIG. 1, in which FIG. 6A is a side sectional view, FIG. 6B is a perspective view, and FIG. 7A and 7B are explanatory views showing a configuration of a main part of FIG. 1, in which FIG. 7A is a front view and FIG. 7B is a sectional view of FIG. 8A and 8B are explanatory views showing the configuration of the stirrer of the stirrer holder of FIG. 1, in which FIG. 8A is a plan view, FIG. 8B is a perspective view, and FIG.

As shown in FIGS. 1 to 8, the stirrer 10 of the present embodiment abuts against a stainless steel stirring container 11 that holds water and foodstuffs inside and a bottom 13 of a stirring tub 12 to support it. And a base 21 as a main body. The base 21 is movably supported by four front, rear, left and right casters 22, and an operation panel 23 including a drive timer and the like is arranged on the front surface of the base 21.

The stirring container portion 11 includes a stirring trough portion 12 whose diameter is reduced from the central height position of the side wall so that the inner diameter of the bottom portion 13 is smaller than the inner shape of the upper opening portion 14, and the bottom portion 13 of the stirring trough portion 12. And a holding cup portion 31 as a magnetic contact portion, which is mounted so as to communicate with the opening portion 34 so as to close the through hole formed in the central portion thereof. A sealing lid 15 having a silicone rubber packing (not shown) is provided in the opening 14 at the upper part of the stirring tub 12, and the four sealing clips 15 are evenly arranged on the outer peripheral wall of the stirring tub 12. The sealing lid 15 can be detachably fixed at 16.

A pair of handles 17 is provided in a projecting manner on the upper portion of the side wall of the stirring tub 12 of the stirring container 11 so as to face each other. The bottom 13 of the stirring tub 12 is formed with a fixing piece 18 extending in a direction away from the center position. Each of the fixing pieces 18 is formed with a concave portion symmetrically with respect to a point, and a screwing type fixing tool 25 is formed on the upper surface of the base 21 corresponding to the concave portion, and the screwing type fixing tool 25 is loosened. After the holding cup portion 31 of the stirring container portion 11 is fitted into the recess of the base 21 in this state, the holding cup portion 31 is rotated as a center to dispose the recess directly below the screw-in type fixing tool 25, and then the fixing tool. Fix at 25.

The stir piece holder 41 is detachably inserted into the holding cup portion 31. A dish-shaped heat conductive bracket 44 is attached to the stirring bar holder 41 so as to close the opening 34. Below the heat conductive bracket 44, a rotating portion 42 that rotates according to the displacement of the rotating magnetic field, a rotating shaft 43 having the rotating portion 42 arranged around the axis, and an upper end of the rotating shaft 43. And a stirrer 49 arranged in the section.

The rotating portion 42 is composed of magnet portions 45 in which N poles and S poles are alternately arranged around the axis of the rotating shaft 43, and the outer circumference of these magnet portions 45 is 0 for integrating the individual magnet portions 45. It is covered with a stainless plate 46 having a thickness of 0.5 mm. A communication hole 47 is formed in the shaft center of the rotary shaft 43 from the upper end to the lower end. The communication hole 47 allows the liquid to be stirred to escape from the lower end portion to the upper end portion, which facilitates attachment and detachment.

The holding cup portion 31 includes a support portion 32 that rotatably fits and supports the lower end portion of the rotary shaft 43 of the stir piece holding portion 41, and a diameter expansion portion that loosely fits the rotating portion 42 of the stir piece holding portion 41 inside. 33 and a heat conductive bracket 44 that forms an opening 34 to the stirring tub 12. At the center of the heat conductive bracket 44, a fluorine type sleeve bearing 44a as a first bearing fitted to the rotary shaft 43 is mounted.

Further, a fluorine-based sleeve bearing 48 as a second bearing is fitted to the rotary shaft 43 at the boundary between the expanded diameter portion 33 and the support portion 32. The length of the lower end of the rotary shaft 43 is longer than the length of the rotating portion. This is because when the stirrer holder 41 is mounted through the opening 34, after the lower end of the rotary shaft 43 reaches the support 32 of the holding cup 31, the rotating part equipped with the magnet becomes the expanded part. Since it is inserted, there is an advantage that the mounting is easy.

A cylindrical rotating portion drive portion 51 is arranged on the outer wall of the expanded diameter portion 33 of the holding cup portion 31 inside the base 21. Inside the rotary unit drive unit 51, a coil unit 52 is arranged facing the rotary unit 42, in which a large number of concentric coil groups are arranged in a cylindrical shape. In addition, an induction magnetic field control unit that controls the energization of each of a large number of coil groups of the coil unit 52 to induce and control the rotating magnetic field is arranged on the control panel 24 of the base 21. With this heat conductive bracket 44, the heat generated in the rotating portion 42 is well diffused from the rotating portion 42 to the stirring tub portion 12.

An air-cooling heat sink 53 for heat radiation is arranged on the outer peripheral wall of the coil portion 52 of the rotating portion driving portion 51. The air is supplied to the air-cooling heat sink 53 by a fan 54 arranged behind the rotating portion drive unit 51 of the base 21, and the air supplied by the fan 54 is heated by the heat sink 53. An air supply cover 55 that is open to the rear of the base 21 is provided so as not to mix with.

The induction magnetic field control means of the control board 24 sequentially changes the polarity of the generated magnetic field by PWM-controlling the electric power supplied to the individual coil groups of the coil unit 52 of the rotating unit drive unit 51 to sequentially switch the polarity. Let The sequentially displaced rotating magnetic field causes the rotating portion 42 to rotate by applying a magnetic attractive force and a repulsive force to each magnet portion 45 of the rotating portion 42. By rotating the rotating portion 42, the rotating shaft 43 and the stirring bar 49 are rotated to stir the food and water inside the stirring tub 12. Initially, the current supplied to the coil group was driven at 1.7 A, but if it is set to 2.5 A in order to increase the rotation output of the rotating portion, it will be controlled by the heat generated during long-term use. The system may be adversely affected, and the system may stop or malfunction. By providing the heat sink 53 and the fan 54, malfunction does not occur even when used for a long time.

In the stirrer 10 of the present embodiment, the induction magnetic field control means of the control panel 24 controls so as to change the stirring speed between the initial stage of stirring and the latter stage of stirring. That is, the rotation speed of the stirring blade at the beginning of stirring is set to 300 rpm, and after stirring for 1 minute and a half, control is performed to 800 rpm for 1 minute and a half. This is because the food is not completely dissolved in water at the beginning of stirring, so by gently stirring, it is possible to prevent the water from jumping out of the stirring trough portion 12 due to the rotation of the stirrer, and to dissolve the food in water at the latter stage of stirring. Since the viscosity is increased, it is possible to deal with the problem by increasing the rotation speed.

The gap between the magnet portion 45 of the rotating portion 42 and the coil portion of the rotating portion driving portion 51 is 2 mm or less. That is, in order to integrate the rotating portion 42, the magnet portion 45 is covered with a stainless plate 46 having a thickness of 0.5 mm, and then the enlarged diameter portion 33 of the holding cup portion 31 having a thickness of 0.5 mm is separated by a gap of 1 mm or less. Is separated from the coil group of the rotating part driving part 51 by a wall surface of the above, and the gap between the coil part of the rotating part driving part 51 is 2 mm or less.

The stirrer 49 of the present embodiment has a horizontal disc 49a orthogonal to the rotary shaft 43, and is bent at an angle of 120° with an angle of 10° with respect to the circumference of the disc to be bent 142 mm. Two stirring blade pieces 49b having a plate thickness of 2 mm provided with a long blade portion stood up and were bent at an angle of -143° with an angle of 10° with respect to the circumference of the disc, and were bent 51 mm. Two agitating small blade pieces 49c each including an intermediate blade portion and a 20 mm tip blade portion bent at 90° with respect to the intermediate blade portion are formed downward. The stirring vane piece 49c can supply a stirring flow to the heat conductive bracket.

FIG. 9 is a plan view showing the configuration of another embodiment of the stirrer of the present invention. FIG. 10 is a sectional view of FIG. FIG. 11 is a sectional view showing the configuration of the main part of FIG. In the stirrer of FIGS. 1 to 8, assuming a case where it is erected in the lower direction with respect to the bottom of the stirring tub, the magnetic contact portion of the magnetic contact portion erected in the lower direction with respect to the bottom of the stirring tub is assumed. The holding cup portion 31 includes a support portion 32 that fits and supports a lower end portion around the axis of the stir piece holding portion 41, and a diameter expansion portion 33 that loosely fits the rotating portion 42 of the stir piece holding portion 41 inward. It was equipped.

On the other hand, assuming that it is erected in the upper direction with respect to the bottom of the stirring tub, as shown in FIGS. 9 to 11, the stirrer 60 of the present embodiment has water and food ingredients inside. And a base 71 as a main body for supporting and supporting the bottom 63 of the stirring tub 62. The stirring container portion 61 detachably attached to a base 71 having four casters 72 has a standing cylindrical portion 76 as a magnetic contact portion that is erected upward from a bottom portion 63 of a stirring trough portion 62. I have it.

A disk-shaped rotating unit driving unit 91 is arranged on a base 71 inside the recess of the standing cylindrical unit 76, and an agitator holding unit 81 is provided around the cylindrical side wall of the standing cylindrical unit 76. It is arranged. The stirrer holder 81 has an outer shape that covers the top and side walls of the standing cylindrical portion 76 that rotates about the rotary shaft 83, and four stirrers 89 are provided at the opposite positions on the side wall. Equipped.

On the side wall of the stirrer holder 81, there is arranged a rotating part 82 composed of a magnet part 85 in which N poles and S poles are alternately arranged around the axis of the cylindrical side wall of the standing cylindrical part 76. In addition, inside the disc-shaped turning unit drive unit 91, a coil unit 92 is arranged facing the turning unit 82, in which a large number of concentric coil groups are arranged in a tubular shape. Although not shown in the figure, an induction magnetic field control means for controlling energization of each of a large number of coil groups of the coil portion 92 to induce and control a rotating magnetic field is arranged on the control panel of the base 71.

Although not shown in FIGS. 9 to 11, also in this embodiment, the rotating portion heat radiating means and the air-cooling heat sink for heat radiation may be arranged in the present embodiment.

10, 60... Stirrer,
11, 61... stirring container part,
12, 62... stirring tub part,
13, 63... bottom,
14... Aperture,
15... Sealing lid,
16... Catch clip,
17... Toride
18...Fixing piece,
21, 71...base,
22, 72...Caster,
23... Operation panel,
24... control panel,
25…Fixtures,
31... Holding cup portion (magnetic contact portion),
76... Standing cylindrical portion (magnetic contact portion),
32... Supporting part,
33... Expanded part,
34... Aperture,
41, 81... Stirrer holder,
42, 82... turning part,
43, 83... rotary shaft,
44... Thermally conductive bracket,
44a... Sleeve bearing (first bearing),
45, 85... Magnet part,
46... Stainless plate,
47 ... communication hole,
48... Sleeve bearing (second bearing),
49, 89... Stirrer,
49a... Horizontal disc,
49b... stirring blade pieces,
49c... small blade with stirring,
51, 91... Rotating part driving part,
52, 92... Coil part,
53... Air-cooling heat sink,
54...fan,
55... Air supply cover,

Claims (6)

An agitating trough part for holding an object to be agitated therein, and a magnetic contact erected upward or downward with respect to the bottom part of the agitating trough part at a predetermined position on a part of the bottom part of the agitating trough part. A stirring container part having a part,
An agitator arranged inside the agitating trough, and a magnet part in which N poles and S poles are alternately arranged around an axis of the agitator holding portion for rotating the agitator around an axis An agitator holding part including a rotating part,
A main body part having a rotating part driving part for generating a rotating magnetic field facing the rotating part of the stirring bar holding part;
In a stirrer in which a rotating part of the stirring bar holding part in the stirring container part via the magnetic contact part and a rotating part driving part of the main body part outside the stirring container part are arranged,
The rotating part driving part controls the energization of each of the coil part and the coil part in which a large number of concentric coil groups are arranged annularly so as to face the rotating part of the stirring bar holding part. An induction magnetic field control means for inductively controlling the rotating magnetic field,
Each coil of the coil group is arranged in a direction for generating an induction magnetic field facing the rotating portion,
The agitator, wherein the agitating container part is detachably arranged with respect to the main body part of the agitator together with the agitator holding part. A magnetic contact portion, which is erected downwardly with respect to the bottom of the stirring tub, fits and supports a lower end portion around the axis of the stirring bar holder, and rotation of the stirring bar holder. The agitator according to claim 1, further comprising a diameter-expanded portion that loosely fits the inside portion. The rotating portion drive portion is arranged in a concave portion of the magnetic contact portion that is erected in an upward direction with respect to a bottom portion of the stirring tub portion
The agitator according to claim 1, wherein the rotating portion of the agitator holding portion is arranged around a side wall of the magnetic contact portion. The stirrer according to claim 2 or 3, further comprising heat dissipation means for diffusing heat generated by the rotation of the rotating portion. The heat dissipating means is a rotating part heat dissipating means including a heat conductive bracket arranged on the side of the stirring trough of the rotating part and the stirrer supplying a stirring flow to the heat conductive bracket. The stirrer according to claim 4, characterized in that 6. The drive unit heat dissipating unit, wherein the heat dissipating unit comprises an air cooling heat sink arranged in the rotating unit driving unit, and a blowing unit for blowing air to the air cooling heat sink. The stirrer described.

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