JP2012084348A - Electric conduction heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric conduction heating device which improves the quality of a processing object by constantly stirring and heating a whole of the processing object in a vessel and with a simple constitution.SOLUTION: In an electric conduction heating device, a pair of electrode parts 2, 3 is disposed in a vessel 1 and a voltage is applied between the pair of electrode parts 2, 3 to heat a processing object W contained in the vessel 1 by electric conduction. The vessel 1 is formed in a bottomed cylindrical shape. A stirring member 12 for stirring the processing object W in the vessel 1 by rotating around a central axis X in the vessel 1 is provided in the electric conduction heating device. Each of the pair of electrode parts 2, 3 is arranged on both sides across a plane Z including the central axis X in the vessel 1 in a state where a clearance A is formed between an inner peripheral surface 1d in the vessel 1 and the electrode parts, respectively. Each of the pair of electrode parts 2, 3 is divided into a plurality of electrode parts around the central axis X in the vessel 1. The electrode parts are arranged by forming a clearance C, where the processing object W is movable, between adjacent each of the divided electrodes 2a, 2b, 2c, 2d and between adjacent each of the divided electrodes 3a, 3b, 3c, 3d.

Description

  The present invention relates to an electric heating apparatus in which a pair of electrode parts is provided in a container, and a voltage is applied between the pair of electrode parts to electrically heat a processing object accommodated in the container.

  Such an energization heating device applies joule heating (direct energization) by applying a voltage between a pair of electrode portions provided in a container and generating heat by the electrical resistance of the treatment target itself existing between the pair of electrode portions. It is comprised so that a process target object may be heated by performing (heating) (for example, patent document 1 and 2). Examples of such objects to be treated are relatively viscous, such as liquid fluid food materials such as custard cream and white sauce, and solid-liquid mixtures containing water-soluble polymers such as PVA (polyvinyl alcohol) in water. High viscosity materials (including materials that increase in viscosity with heating) can be exemplified.

  As such an electric heating device, for example, in Patent Document 1, an inner peripheral surface of a container is used as a pair of electrode parts in a container formed into a bottomed cylindrical shape using an electrically insulating substance such as a synthetic resin. An outer electrode part that is attached to the inner peripheral surface side of the container over the entire circumference so as to constitute, and a cylindrical inner electrode part that is inserted from above the container and disposed at the center of the container are provided. The configuration is disclosed. In this energization heating apparatus, the distance between the outer electrode portion and the inner electrode portion can be made the same distance over the entire circumference, and the object to be processed existing between these electrode portions can be heated uniformly. ing.

  Moreover, as such an electric heating apparatus, for example, in Patent Document 2, an inner periphery of a container is formed as a pair of electrode parts in a container formed into a bottomed cylindrical shape using an electrically insulating substance such as a synthetic resin. An outer electrode part that is attached to the inner peripheral surface side of the container over the entire circumference so as to constitute a surface, and a position that is inserted from above the container and shifted to the outer electrode part side by a predetermined distance from the center of the container A configuration in which a cylindrical inner electrode portion is provided is disclosed. In this energization heating apparatus, the inner electrode portion revolves around the center of the container, and stirring can be performed while uniformly heating the object to be processed.

JP 2002-315549 A JP 2003-157756 A

However, in the current heating apparatus disclosed in Patent Documents 1 and 2, the outer electrode portion made of a conductive metal is attached to the inner peripheral side of a container made of a synthetic resin or the like. Is difficult to maintain, and it is difficult to maintain the sealing function of the bonded portion for a long period of time. In addition, since an electric current flows, the outer electrode portion is disposed on the inner peripheral side of the container and below the upper end portion (synthetic resin portion) of the container, but is recessed from the outside of the container in this way. In order to connect the energization cord for supplying current to the outer electrode portion at the location, it is necessary to adopt a complicated configuration and to arrange a sealing member having a sealing function at the connection portion.
Therefore, these current heating devices have a problem that the device configuration becomes complicated in the adhesion of electrode portions, the seal structure, and the like.

  On the other hand, it is also conceivable to adopt a configuration in which both of the paired electrode parts are disposed in the container without attaching the electrode part to the container as the electric heating device. For example, as shown in FIG. 6, a pair of electrode parts (one side electrode part 61, the other side electrode part 62) are inserted into the container 60 from above the bottomed cylindrical container 60, and the one side electrode part The electric heating apparatus 100 which has arrange | positioned 61 and the other side electrode part 62 on the both sides which pinched | interposed the plane Z containing the central axis X of the container 60 can be illustrated. Each of the one-side electrode portion 61 and the other-side electrode portion 62 is a plate-like electrode that is long in the direction along the central axis X of the container 60 in a state of being inserted into the container 60. It is comprised in the shape curved in circular arc shape along the surface 60a.

  In this energization heating apparatus 100, since the seal | sticker etc. are not required when arrange | positioning the electrode parts 61 and 62 used as a pair in the container 60, an apparatus structure becomes comparatively simple. However, since each of the electrode parts 61 and 62 forming a pair is configured in a plate shape curved in an arc along the inner peripheral surface 60 a of the container 60, A gap A is formed between the outer peripheral surfaces 61a and 62a of the electrode portions 61 and 62 and the inner peripheral surface 60a of the container 60 (inner diameter side of the inner peripheral surface 60a of the container 60). In this case, even if a voltage is applied between the pair of electrode portions 61 and 62, no current flows through the processing object W present in the gap A, so the processing object W cannot be heated, The processing object W in the container 60 has a non-heated part and a heated part, and there is a possibility that the quality of the product is deteriorated.

Further, the current heating apparatus 100 is provided with a stirring member 63 that rotates around the central axis X of the container 60 in the container 60, and the processing object W between the pair of electrode portions 61 and 62 is stirred. It is also considered. However, as described above, the pair of electrode portions 61 and 62 are configured in a plate shape curved in an arc shape along the inner peripheral surface 60 a of the container 60, so that the processing object W is stirred by the stirring member 63. However, the processing object W existing in the gap A stays without being stirred, and the retained processing object W remains as a non-heated portion. That is, as shown by the arrows in FIG. 6, the processing object W is stirred in a vortex centered on the central axis X, but in the vicinity of the upstream end portions 61 b and 62 b of the one side electrode portion 61 and the other side electrode portion 62. Then, since the processing object W moves to the central axis X side without entering the gap A and is stirred in a vortex, the processing object W stays in the gap A or in the vicinity of the upstream end portions 61b and 62b. It remains. In particular, when the viscosity of the processing object W is high, or when the gap A is narrow, the processing object W may be more likely to stay in the gap A.
Furthermore, even when the stirring member 63 is rotated in the case of cleaning the inside of the container 60, it is difficult to sufficiently flow the cleaning fluid through the gap A. There is a problem that the processing object W remaining in the vicinity of 61b and 62b cannot be reliably washed out and becomes an uncleaned state or requires a great deal of labor for surely cleaning.

  The present invention has been made in view of such circumstances, and the purpose thereof is to improve the quality of the processing object by simply heating the whole processing object in the container while stirring it with a simple configuration. An object of the present invention is to provide an electric heating device that can be improved.

According to the present invention for achieving the above object, a pair of electrode portions are provided in a container, and a treatment object accommodated in the container is energized and heated by applying a voltage between the pair of electrode portions. The characteristic configuration of the current heating device
The container is formed in a bottomed cylindrical shape, and includes a stirring member that rotates around the central axis of the container and stirs the processing target in the container.
Each of the paired electrode portions is disposed on both sides of a plane including the central axis of the container, with a gap formed between the inner peripheral surface of the container,
Each of the paired electrode portions is divided into a plurality of portions around the central axis of the container, and the processing object is arranged so as to be movable between adjacent portions of the divided electrodes. is there.

  According to the above characteristic configuration, when the object to be processed in the container is stirred around the central axis of the container by the stirring member, the object to be processed is forcibly formed between adjacent electrodes. The gaps formed between the outer sides of the electrodes and the inner peripheral surface of the container can be moved through the gaps, and the object to be processed existing in the gaps can be fluidized. Therefore, the retention of the processing object existing in these gaps is prevented, and the entire processing target existing in the container is repeatedly heated and stirred between the pair of electrode parts, so that the processing existing in the gaps is performed. It is possible to reliably prevent the object from remaining in an unheated state.

In addition, it is possible to adopt a configuration in which a pair of electrode parts is disposed in the container in a state where a gap is formed with respect to the inner peripheral surface of the container without being attached to the container, and a current is passed through the electrode part. When an energization cord or the like is installed, there is no need to provide a seal member or the like for preventing contact with the object to be processed in the container, so that a very simple configuration can be achieved.
Further, by rotating the stirring member when cleaning the inside of the container, the cleaning liquid is inserted into the gap between the outer side of each electrode and the inner peripheral surface of the container via the gap between the adjacent electrodes. Can be reliably passed, and cleaning of the inside of the container, particularly the gap, can be performed reliably and easily.

  Therefore, even if the viscosity of the object to be processed is relatively high, the quality of the object to be processed is improved by heating the entire object to be processed in the container with a simple structure while reliably stirring. can do.

  According to a further characteristic configuration of the electric heating apparatus according to the present invention, each of the electrodes is formed of a columnar long member, and the axis of each of the long members is parallel to the central axis of the container. It exists in the point arrange | positioned by inserting in the said container from the upper direction of a container.

According to the above-described characteristic configuration, all the electrodes configured by the columnar long member are inserted into the container from above the container so that the axis of the long member is parallel to the central axis of the container. Therefore, the arrangement of these electrodes in the container can be performed very easily and simply.
Further, since each electrode is formed in a columnar shape, each electrode has a thickness in the radial direction of the container in a state of being disposed in the container. Therefore, when the object to be processed is agitated by the agitating member rotating around the central axis of the container, each of these electrodes functions as a baffle plate for the object to be agitated. Can be promoted. In addition, since the gap formed between the adjacent electrodes has a thickness in the radial direction of the container, it is moved to these gaps together with the promotion of stirring of the processing object by the baffle plate. As a result, the amount of the processed object increases, and more processed objects move to the gap formed between the outer side of each electrode and the inner peripheral surface of the container. Therefore, it is possible to further promote the spiral flow of the processing object around the central axis of the container, which is generated by the rotation of the stirring member.

  A further characteristic configuration of the electric heating device according to the present invention is such that each of the electrodes constituting each of the paired electrode portions is symmetric with respect to a plane including the central axis of the container. It exists in the point curvedly arrange | positioned on the circumference centering on a central axis.

  According to the above characteristic configuration, each electrode is curvedly arranged on the same circumference centered on the central axis so that the distance from the central axis of the container is the same, and therefore rotates around the central axis of the container. The rotation radius of the stirring member to be performed can be set as large as possible without being in contact with each electrode. Therefore, it is possible to further promote the vortex flow of the processing object around the central axis of the container that is generated by the rotation of the stirring member without increasing the outer shape of the container.

  A further characteristic configuration of the energization heating device according to the present invention is that the current application unit applies a voltage between the pair of electrode units so that the currents flowing through the electrodes have the same value.

According to the above characteristic configuration, for example, the distance between the electrodes constituting the paired electrode portions (the distance between the electrodes arranged on both sides across the plane including the central axis of the container) is different from each other. Even if it is assumed that the currents flowing through the electrodes have different values based on the influence of the arrangement relationship of the electrodes, the current application unit has the same current flowing through the electrodes. Thus, a voltage can be applied between electrode parts.
As a result, even if the arrangement of the electrodes is changed, a current having the same current value can be surely passed through the processing object existing between the electrode parts, and the uniform heating of the processing object is reliably performed. be able to.

Schematic side view of the electric heating device Cross section view of stirring tank Schematic configuration diagram showing stirring tank and energization heating mechanism Cross-sectional view of a stirring tank according to another embodiment Cross-sectional view of a stirring tank according to another embodiment Cross-sectional view of a container in a conventional electric heating device

  Hereinafter, based on FIGS. 1-3, embodiment of the electric heating apparatus 50 of this invention is described.

As shown in FIG. 1, the electric heating device 50 includes an agitation tank 1 (an example of a container) that accommodates an object to be processed W, one side electrode part 2 provided in the agitation tank 1, and the other side electrode part 3. A voltage is applied between the pair of electrode portions to energize and heat the processing object W accommodated in the stirring tank 1, and stirring to stir the processing object W in the stirring tank 1. A mechanism K and a support base B that supports the stirring tank 1 and the like are provided.
That is, the energization heating device 50 applies the voltage between the one side electrode part 2 and the other side electrode part 3 to the processing target object W accommodated in the stirring tank 1, so that the electric power of the processing target object W itself. The heat treatment and dissolution treatment of the processing object W can be performed by stirring with the stirring mechanism K while heating by heating with resistance.

In addition, as such a processing target W, for example, liquid fluid food materials such as custard cream and white sauce, and solid-liquid mixed solutions containing water-soluble polymers such as PVA (polyvinyl alcohol) in water are compared. A viscous material having a high target viscosity (including a material whose viscosity increases with heating) can be exemplified, but in the following, a solid-liquid mixed solution containing PVA in water is used as the processing object W.
Hereinafter, the structure of each part of the electric heating apparatus 50 will be described.

  As shown in FIG. 1, the support base B is formed in a substantially U shape in a side view, and is disposed on the lower base 30 on which the stirring tank 1 can be placed and supported, and on the upper portion of the stirring tank 1. An upper base 31 provided with a moving mechanism (not shown) capable of moving the lid body 4 in the vertical direction, and a column part 32 connected to the lower base 30 and supporting the upper base 31. Composed.

  The stirring tank 1 is formed in a bottomed cylindrical shape and is made of a resin having electrical insulation and heat resistance. In the upper part of the agitation tank 1, an opening 1a through which the processing object W can be put is formed, and a disc-shaped lid 4 is provided that can freely open and close the opening 1a. At the center of the bottom of the stirring tank 1, there is provided a discharge port 1b for discharging the processing object W that has been subjected to heat treatment and dissolution treatment, and is configured to be discharged to the outside via the on-off valve 1c. In the present embodiment, the inner diameter of the stirring tank 1 is about 312 mm.

  A cylindrical boss 4a that protrudes upward is formed at the center of the lid body 4, and a through-hole 4b that passes through a drive shaft 10 of a stirring mechanism K described later is formed on the inner diameter side of the boss 4a. Is provided. In addition, a plurality of attachment portions 4 c (for example, eight) for attaching the one side electrode portion 2 and the other side electrode portion 3 are disposed on the outer peripheral portion of the lid body 4. Each attachment portion 4c is provided with an electrode through-hole 4d that penetrates the upper surface and the lower surface of the lid 4, and the diameter of the electrode through-hole 4d is reduced in the one-side electrode portion 2 and the other-side electrode portion 3. The upper end portion is inserted, and the one-side electrode portion 2 and the other-side electrode portion 3 can be attached and fixed to the lid body 4 in a suspended state. In addition, an electrically insulating insulating bush (not shown) is provided at a contact portion between the electrode through-hole 4d and the upper end portions of the one-side electrode portion 2 and the other-side electrode portion 3, and the lid 4 and the one-side electrode portion are provided. Insulation between the electrode part 2 and the other electrode part 3 is achieved.

  Further, on the outer side of the boss 4 a in the lid 4, a temperature sensor 5 made of a tubular heat measuring resistor capable of measuring the temperature of the processing object W in the stirring tank 1 is disposed, and the detected temperature is set. It is comprised so that an output is possible to the control part 21 mentioned later (refer FIG. 3).

The stirring mechanism K includes a drive motor 11 that rotationally drives the drive shaft 10, and a flat plate-like stirring blade 12 (an example of a stirring member) disposed below the drive shaft 10.
The drive motor 11 is fixed to the upper surface of the lid body 4 by a fastening bolt (not shown) through a fixing bracket 13 with the drive shaft 10 inserted through the through hole 4 b of the lid body 4. The drive shaft 10 is configured to be rotatable coaxially with the central axis X of the stirring tank 1, and the type of the object W to be processed, the voltage applied by the energization heating mechanism H, the one side electrode portion 2 and the other side electrode portion 3. It is set to rotate at an appropriate number of rotations according to the arrangement and the like. For example, in this embodiment, the rotation speed of the drive shaft 10 is set to 60 rotations per minute.

The stirring blade 12 formed in a flat plate shape is formed in a substantially rectangular shape, and in a state where the longitudinal direction is along the driving shaft 10 and the short side direction is along the rotational radius direction of the driving shaft 10, It is disposed in the lower part (substantially lower half of the drive shaft 10). The lower side portions 14 of the stirring blade 12 in the short direction are arranged to extend slightly below the lower end of the drive shaft 10. Further, the stirring blade 12 has two pairs of rectangular stirring ports 15 that are formed in a flat plate shape and penetrate in the thickness direction and are symmetrical with respect to the drive shaft 10 in the short side direction (four in total). Is provided. In the present embodiment, the length (rotation radius) in the short direction of the stirring blade 12 is formed to be about 60 mm.
Therefore, the stirring blade 12 is driven to rotate around the central axis X of the stirring tank 1 by the drive motor 11, so that the processing object W is centered in the stirring tank 1 as shown in FIGS. 1 and 2. In the vicinity of the central axis X, it flows toward the bottom, and sequentially toward the inner peripheral surface 1d of the stirring tank 1 at the bottom, toward the upper portion at the inner peripheral surface 1d, and toward the central axis X at the upper portion. Can be circulated and fluidized.

  As shown in FIGS. 1 to 3 (particularly, FIG. 3), the electric heating mechanism H includes the one-side electrode part 2 and the other-side electrode part 3 that are opposed to each other in the stirring tank 1, the one-side electrode part 2, and And a voltage applying unit 20 that applies a voltage between the other side electrode units 3. The voltage application unit 20 is disposed on the upper base 31 of the support base B. The power supply S for energizing the voltage application unit 20 is not particularly limited, such as a commercial power supply or a high-frequency power supply. In this embodiment, a three-phase AC power supply (200 V) as a commercial power supply is used.

  The one-side electrode portion 2 is composed of a plurality of cylindrical (e.g., columnar) long members, and in this embodiment, four long members (hereinafter, each one-side electrode 2a, 2b, 2c, 2d). May be written). Similarly, the other side electrode portion 3 is also composed of a plurality of columnar (columnar example) long members, and in this embodiment, four long members (each other side electrodes 3a, 3b, 3c, 3d)). Current-carrying terminals (not shown) disposed at the upper ends of the respective one-side electrodes 2a, 2b, 2c, 2d and the other-side electrodes 3a, 3b, 3c, 3d are attached to the lid 4 in a suspended state. In this state, the lid 4 protrudes from the upper surface of the lid 4 and is connected to the power source S through an electric circuit described later. The one-side electrode portion 2 and the other-side electrode portion 3 are formed by thermally spraying conductive aluminum on a titanium electrode in order to prevent corrosion when a three-phase AC power source is used as the power source S as described above. . In the present embodiment, cylindrical long members having an outer diameter of about 30 mm were used as the one side electrodes 2a, 2b, 2c, 2d and the other side electrodes 3a, 3b, 3c, 3d.

  Here, as shown in FIG. 1, the one-side electrode portion 2 and the other-side electrode portion 3 constituted by the longitudinal members are viewed from above the stirring tank 1 through the opening 1 a in the longitudinal sectional view of the stirring tank 1. The longitudinal member is inserted so that the axis of the longitudinal member is parallel to the central axis X of the stirring tank 1, and the lower end of the longitudinal member is positioned near the lower end of the vertical portion of the inner peripheral surface 1d of the stirring tank 1. However, the arrangement positions of the one-side electrode portion 2 and the other-side electrode portion 3 in the cross-sectional view of the stirring tank 1 will be described. As shown in FIGS. 2 and 3, the arrangement position is such that the one-side electrode 2 and the other-side electrode 3 sandwich the plane Z including the central axis X of the stirring tank 1 in the cross-sectional view of the stirring tank 1. Disposed on both sides, a gap A is formed between the outer side of the one side electrode portion 2 and the inner peripheral surface 1d of the stirring tank 1, and the outer side of the other side electrode portion 3 and the inner peripheral surface 1d of the stirring tank 1 It arrange | positions in the state which formed the clearance gap A between, respectively. In this embodiment, the gap A is set to about 7 mm.

  Then, in the cross-sectional view of the stirring tank 1, each one side electrode 2a, 2b, 2c, 2d has a gap C in which the processing object W can move between the one side electrodes 2a, 2b, 2c, 2d. As is formed, the stirring tank 1 is curvedly arranged on the circumference centering on the central axis X. Similarly, in the cross-sectional view of the agitation tank 1, each other side electrode 3a, 3b, 3c, 3d has a gap C in which the processing object W can move between the other side electrodes 3a, 3b, 3c, 3d. Are arranged in a curved manner on the circumference around the central axis X of the stirring tank 1.

  Accordingly, the one-side electrode portion 2 is divided into a plurality of one-side electrodes 2 a, 2 b, 2 c, 2 d around the central axis X of the stirring tank 1, and the other-side electrode portion 3 is around the central axis X of the stirring tank 1. Are divided into a plurality of other electrodes 3a, 3b, 3c, 3d. Further, as shown in FIG. 3, the first electrode pair T1 including the one side electrode 2a and the other side electrode 3a paired with the one side electrode 2a, the one side electrode 2b and the one side electrode 2b The second electrode pair T2 composed of the other electrode 3b that forms a pair, the third electrode pair T3 composed of the one electrode 2c and the other electrode 3c that forms a pair with the one electrode 2c, and the one electrode 2d A fourth electrode pair T4 is formed, which is composed of the other electrode 3d that forms a pair with the one electrode 2d. Therefore, as shown in FIGS. 2 and 3, the one side electrodes 2 a, 2 b, 2 c, 2 d and the other side electrodes 3 a, 3 b, 3 c, 3 d constituting these electrode pairs are cross-sectional views of the stirring tank 1. As viewed, the curves are arranged on the same circumference around the central axis X of the stirring tank 1 so as to be symmetrical with respect to a plane Z (shown by a broken line in FIG. 3) including the central axis X of the stirring tank 1. Is done. In this embodiment, in the cross-sectional view of the stirring tank 1, the axis of each one side electrode 2a, 2b, 2c, 2d and each other side electrode 3a, 3b, 3c, 3d from the central axis X of the stirring tank 1 The distance to the axis is set to about 134 mm.

  In this embodiment, as shown in FIGS. 2 and 3, each one-side electrode 2 a, 2 b, 2 c, 2 d is arranged around the central axis X with respect to the plane Z including the central axis X of the stirring tank 1. The one-side electrode 2a is disposed at a position rotated 45 degrees counterclockwise, and the other one-side electrodes 2b, 2c, 2d are spaced 30 degrees counterclockwise around the central axis X from the position. Each is configured to be arranged at equal intervals. Similarly, each of the other side electrodes 3a, 3b, 3c, 3d is rotated at 45 degrees clockwise around the central axis X with respect to the plane Z including the central axis X of the stirring tank 1. The other electrodes 3b, 3c, 3d are arranged at equal intervals, with an angle of 30 degrees clockwise around the central axis X from the position. Therefore, in this embodiment, the distance of the gap C formed between the adjacent one side electrodes 2a, 2b, 2c and 2d and between the adjacent other side electrodes 3a, 3b, 3c and 3d is set to about 50 mm. Has been.

  As shown in FIG. 3, the voltage application unit 20 can apply a voltage between the one-side electrode unit 2 and the other-side electrode unit 3, and can be configured to individually apply a voltage to each electrode pair. It is mainly composed of an electric circuit provided with a control unit 21. In this embodiment, a predetermined first voltage is applied to each of the first electrode pair T1 and the fourth electrode pair T4, and a predetermined second voltage is applied to each of the second electrode pair T2 and the third electrode pair T3. A case where a voltage (a voltage different from the first voltage) is applied will be described.

Specifically, as shown in FIG. 3, one terminal of the first insulation transformer 23 is connected to one terminal of the distribution board 22 connected to the power source S, and one terminal of the first insulation transformer 23 is connected. The one electrode 2a of the first electrode pair T1 and the one electrode 2d of the fourth electrode pair T4 are connected in parallel. Similarly, the other terminal of the first insulating transformer 23 is connected to the other terminal of the distribution board 22 connected to the power source S, and the other terminal of the first electrode pair T1 is connected to the other terminal of the first insulating transformer 23. The electrode 3a and the other electrode 3d of the fourth electrode pair T4 are connected in parallel.
Further, one terminal of the second insulation transformer 24 is connected to one terminal of the distribution board 22 connected to the power source S, and one side electrode of the second electrode pair T2 is connected to one terminal of the second insulation transformer 24. 2b and one electrode 2c of the third electrode pair T3 are connected in parallel. Similarly, the other terminal of the second insulation transformer 24 is connected to the other terminal of the distribution board 22 connected to the power source S, and the other terminal of the second electrode pair T2 is connected to the other terminal of the second insulation transformer 24. The electrode 3b and the other electrode 3c of the third electrode pair T3 are connected in parallel. The potential difference between one terminal of the distribution board 22 and the other terminal is, for example, about 400V.

  Here, the transformation characteristics of the first insulation transformer 23 and the second insulation transformer 24 are as follows: distance between each electrode pair (distance between each electrode arranged on both sides of the plane Z including the central axis X of the stirring tank 1). ) And the like, and the conditions such as the characteristics of the processing object W are set in advance so that the currents flowing through the electrodes 2a, 2b, 2c, 2d, 3a, 3b, 3c, and 3d have substantially the same value. ing. In the present embodiment, the one side electrode 2b and the other side electrode 3b (between the second electrode pair T2) and the one side electrode 2c and the other side electrode 3c (between the third electrode pair T3), respectively. Distance (about 240 mm) is between the one side electrode 2a and the other side electrode 3a (between the first electrode pair T1) and between the one side electrode 2d and the other side electrode 3d (between the fourth electrode pair T4). Since it is longer than each distance (about 170 mm), the second voltage applied between the second electrode pair T2 and the third electrode pair T3 is applied between the first electrode pair T1 and the fourth electrode pair T4, respectively. The currents flowing through the electrodes 2a, 2b, 2c, 2d, 3a, 3b, 3c, and 3d are appropriately set to be substantially the same value.

  A first power measuring unit 25 that measures the power supplied to the first insulating transformer 23 and outputs the measurement result to the control unit 21 is provided between the first insulating transformer 23 and the distribution board 22. In addition, a first thyristor 26 that cuts off the current from the power source S based on a command from the control unit 21 is provided between one terminal of the distribution board 22 and the first power measurement unit 25. Similarly, a second power measuring unit 27 that measures the power supplied to the second insulating transformer 24 and outputs the measurement result to the control unit 21 is provided between the second insulating transformer 24 and the distribution board 22. . A second thyristor 28 that cuts off the current from the power source S based on a command from the control unit 21 is provided between one terminal of the distribution board 22 and the second power measurement unit 27. Thereby, the control part 21 can confirm whether it has interrupted | blocked reliably while being able to interrupt | block the electric current from the power supply S separately based on the detected temperature from the temperature sensor 5. FIG.

Next, the operation | movement operation | movement which heat-processes and melt | dissolves the process target object W using the electric heating apparatus 50 is demonstrated.
First, a predetermined amount of PVA powder as the object to be processed W is charged into the stirring tank 1 placed on the lower base 30 through the opening 1a of the stirring tank 1. The moving mechanism provided on the upper base 31 is operated to close the opening 1 a of the agitation tank 1 with the lid 4 to which the agitation mechanism K and the one-side electrode part 2 and the other-side electrode part 3 are attached and fixed. And fixed by a clamp member (not shown). Then, by starting to rotate the drive shaft 10, the rotation of the stirring blades 12 arranged to be rotatable around the central axis X of the stirring tank 1 is started. Specifically, the control unit 21 outputs a drive start command to the drive motor 11, and the stirring blade 12 provided on the drive shaft 10 is rotated around the central axis X of the stirring tank 1 at a rotation speed of 60 rotations per minute. Rotate. In this state, a predetermined amount of water is supplied from a water supply port (not shown) provided in the lid 4.

  Next, energization is started between the one-side electrode portion 2 and the other-side electrode portion 3 disposed at positions facing each other across the plane Z including the central axis X of the stirring tank 1. Specifically, the control unit 21 outputs a connection command to the first thyristor 26 and the second thyristor 28 to energize the current from the power source S, and between the first electrode pair T1 and the fourth electrode pair T4. Application of the second voltage is started between the application of the first voltage, the second electrode pair T2, and the third electrode pair T3.

  As a result, as shown in FIGS. 2 and 3, the processing object W in the stirring tank 1 flows in a vortex around the central axis X, moves toward the bottom near the central axis X, and sequentially, at the bottom, the stirring tank. 1 circulates and flows toward the inner peripheral surface 1d, toward the upper portion of the inner peripheral surface 1d and toward the central axis X at the upper portion. With the flow of the processing object W, the processing object W has a gap C formed between adjacent one side electrodes 2a, 2b, 2c, 2d and each other side electrode 3a, 3b, 3c, 3d. It moves forcibly to the gap C formed between adjacent ones. And via these gaps C, the gap A between the outside of each one side electrode 2a, 2b, 2c, 2d and the inner peripheral surface 1d of the stirring tank 1 and the other side electrodes 3a, 3b, 3c, 3d By moving the processing object W into the gap A between the outer side and the inner peripheral surface 1d of the stirring tank 1, the processing object W existing in the clearance A is fluidized. Therefore, the retention of the processing object W existing in the gap A is prevented, and the entire processing object W existing in the stirring tank 1 is connected between the one side electrode part 2 and the other side electrode part 3 (between each electrode pair). ), The heating and stirring are repeated, and it is possible to reliably prevent the processing object W existing in the gap A from remaining in an unheated state.

  In particular, since each one side electrode 2a, 2b, 2c, 2d and each other side electrode 3a, 3b, 3c, 3d are each formed in a columnar shape, in the state of being disposed in the stirring tank 1, these electrodes are The stirring tank 1 has a thickness in the radial direction. As a result, the processing object W is agitated by the agitating blade 12 rotating around the central axis X of the agitation tank 1, so that these electrodes function as a baffle plate for the agitating processing object W. Therefore, stirring of the processing object W can be promoted. In addition, the gap C formed between the adjacent one side electrodes 2a, 2b, 2c, 2d and between the other side electrodes 3a, 3b, 3c, 3d has a thickness in the radial direction of the stirring tank 1. Therefore, in combination with the promotion of the stirring of the processing object W by the baffle plate, the amount of the processing object W moved to the gap C increases, and the one-side electrodes 2a, 2b, 2c, More processing is performed in the gap A formed between the outside of 2d and the inner peripheral surface 1a of the stirring tank 1 and the other outer side electrodes 3a, 3b, 3c, 3d and the inner peripheral surface 1a of the stirring tank 1. The object W will move. Accordingly, it is possible to further promote the spiral flow of the processing object W around the central axis X of the stirring tank 1 generated by the rotation of the stirring blade 12.

  Further, each of the one-side electrodes 2a, 2b, 2c, 2d and the other-side electrodes 3a, 3b, 3c, 3d made of a long columnar member is used for the stirring tank. Since it is only necessary to insert the electrode into the agitation tank 1 from above the agitation tank 1 so as to be parallel to the central axis X, it is very easy to dispose these electrodes in the agitation tank 1. And it can be performed easily.

  On the other hand, in the state where the processing object W in the stirring tank 1 is heated while stirring, the currents flowing through the respective electrodes have substantially the same value, so that the processing object W is heated uniformly. Moreover, since each one side electrode 2a, 2b, 2c, 2d and each other side electrode 3a, 3b, 3c, 3d are formed in the column shape, the electricity supply between each electrode does not deviate from the whole circumference. As a result, the current flow is likely to spread, the energization area is increased, and uniform heating of the processing object W can be more reliably realized.

  Then, the stirring and heating of the processing target W are continued, and the detected temperature input from the temperature sensor 5 to the control unit 21 is a predetermined temperature at which it can be determined that the heating processing and the melting processing of the processing target W are completed (for example, When the temperature reaches about 90 ° C., the controller 21 outputs a connection release command to the first thyristor 26 and the second thyristor 28 after maintaining the predetermined temperature for a predetermined time (for example, 5 minutes). Stop supplying power to the electrode pair. And the control part 21 opens the on-off valve 1c, and discharges | emits the process target W which the heat processing and the melt | dissolution process were completed outside.

  Thereafter, when cleaning the processing object W remaining in the stirring tank 1, by introducing a cleaning liquid into the stirring tank 1 with the on-off valve 1c closed, and rotating the stirring blade 12, In the gap A between the outer side of the one side electrode portion 2 and the inner peripheral surface 1d of the stirring tank 1 and the outer side of the other side electrode portion 3 and the inner peripheral surface 1d of the stirring tank 1, the one side electrodes 2a, 2b, 2c and 2d and the gap C between the other electrodes 3a, 3b, 3c and 3d can be surely passed, and the washing tank 1 and particularly the gap A can be cleaned with certainty. It can be done easily. At this time, since each of the one side electrodes 2a, 2b, 2c, 2d and each of the other side electrodes 3a, 3b, 3c, 3d are formed in a columnar shape, even if the processing object W adheres, it is used for cleaning. There is an advantage that the processing object W is easily separated by the liquid.

[Another embodiment]
(1) In the above embodiment, each of the one side electrodes 2a, 2b, 2c, 2d and each of the other side electrodes 3a, 3b, 3c, 3d is configured as a columnar longitudinal member as an example of a column shape. This configuration is particularly effective as long as it is possible to form a gap C in which the object to be processed W can move between adjacent side electrodes 2a, 2b, 2c, 2d and adjacent adjacent side electrodes 3a, 3b, 3c, 3d. It is not limited to. For example, it can be composed of a polygonal column-shaped longitudinal member, and more specifically, can be composed of a rectangular column-shaped longitudinal member as shown in FIG.

(2) In the above embodiment, each of the one side electrodes 2a, 2b, 2c, 2d and each of the other side electrodes 3a, 3b, 3c, 3d is constituted by a columnar longitudinal member as an example of a column shape, and the stirring tank 1 In the cross-sectional view of FIG. 2, the agitation tank 1 is curvedly arranged on the same circumference around the central axis X of the agitation tank 1 so as to be symmetric with respect to the plane Z including the central axis X of the agitation tank 1. However, as long as the gap C between the adjacent one side electrodes 2a, 2b, 2c, and 2d and the adjacent other side electrodes 3a, 3b, 3c, and 3d can be formed. However, it is not particularly limited to this configuration.
For example, as shown in FIG. 5, each one-side electrode 2a, 2b, 2c, 2d and each other-side electrode 3a, 3b, 3c, 3d are formed of rectangular column-shaped long members, and each one-side electrode 2a, 2b, 2c, 2d and the other electrodes 3a, 3b, 3c, 3d are in a cross-sectional view of the stirring tank 1 with respect to a plane Z (shown by a broken line in FIG. 5) including the central axis X of the stirring tank 1. May be arranged on a straight line parallel to the plane Z so as to be symmetrical. As a result, a plurality of electrode pairs are formed so that each one-side electrode 2a, 2b, 2c, 2d and each other-side electrode 3a, 3b, 3c, 3d correspond one-to-one. Even when each one-side electrode (for example, one-side electrode 2a) and each other-side electrode (for example, the other-side electrode 3a) in the pair have the same distance and the same voltage is applied between each electrode pair, Currents of substantially the same value can be passed through the electrodes, and the current heating of the processing object W can be performed uniformly.
Further, when the respective one-side electrodes 2a, 2b, 2c, 2d and the other-side electrodes 3a, 3b, 3c, 3d are curvedly arranged on the circumference, for example, the central axis X of the stirring tank 1 is set as the center. It may be curvedly arranged on the circumference of a circle centered on another part instead of on the circumference, and for example, centered on the central axis X of the stirring tank 1, but from the central axis X Curves may be provided on the circumferences having different distances (different radii).

(3) In the above embodiment, the gap C formed between the adjacent one side electrodes 2a, 2b, 2c, 2d and the gap C formed between the adjacent side electrodes 3a, 3b, 3c, 3d. However, as long as the treatment object W can be moved favorably in the gap C, it may be formed to have different intervals.

(4) In the above embodiment, each of the four one-side electrodes 2a, 2b, 2c, 2d is the one-side electrode portion 2, and each of the four other-side electrodes 3a, 3b, 3c, 3d is the other-side electrode portion 3. Although the example has been described, if the plurality of electrodes are the one-side electrode portion 2 and the plurality of electrodes corresponding to the one-side electrode portion 2 are the other-side electrode portion 3, the number of the electrodes is particularly limited. It is not limited and can be adopted.

(5) In the above embodiment, the voltage application unit 20 sets the first electrode pair T1 and the fourth electrode pair T4 to a predetermined first voltage, and sets the second electrode pair T2 and the third electrode pair T3 to a predetermined second voltage. As described above, the current flowing through each electrode is configured to have substantially the same value, but the voltage applied to each electrode pair may be set to approximately the same value regardless of the current value.
Moreover, in the said embodiment, although the three-phase alternating current power supply was used as the power supply S, you may employ | adopt DC power supply. When a DC power source is used, the voltage application direction may be changed every predetermined time.

(6) In the above embodiment, the flat stirring blade 12 provided with the stirring port 15 and the like is employed as the stirring member of the stirring mechanism K. However, the present invention is not particularly limited to this configuration, and the processing in the stirring tank 1 is performed. If it is the structure which can fully stir the target object W, the stirring blade and stirring member of another structure are employable. Further, a stirring blade that rotates only near the bottom of the stirring tank 1 may be employed.

(7) In the above embodiment, the discharge port of the processing object W is provided at the bottom of the stirring tank 1, but is not particularly limited to this configuration. For example, the conduit of the lid 4 is intubated, It is good also as a structure discharged | emitted from the upper part of the stirring tank 1 through the said conduit | pipe. In the above embodiment, the lid 4 is moved in the vertical direction relative to the stirring tank 1 by a moving mechanism (not shown), but the stirring tank 1 may be moved in the vertical direction relative to the lid 4. Good.

(8) In the above-described embodiment, the heat treatment and the dissolution treatment are performed using the solid-liquid mixed solution obtained by mixing the PVA powder (water-soluble polymer) with water as the treatment target W. However, the present invention is not limited thereto. Alternatively, a liquid flowable food material such as custard cream or white sauce, which is a viscous material having relatively high viscosity, may be used to perform only heat treatment and dissolution treatment, or heat treatment such as sterilization.

  INDUSTRIAL APPLICABILITY The present invention can be favorably used as an energization heating apparatus that can improve the quality of a processing object by simply heating the entire processing object in a container while stirring it with a simple configuration.

1 Stir tank (container)
1d Inner peripheral surface 2 One side electrode part (a pair of electrode parts)
2a, 2b, 2c, 2d Each one side electrode 3 The other side electrode part (electrode part which makes a pair)
3a, 3b, 3c, 3d Each other side electrode 12 Stirring blade (stirring member)
20 Voltage application unit 50 Electric heating device A Gap C Gap X Central axis Z of stirring tank Flat surface W including central axis of stirring tank

Claims (4)

A pair of electrode portions are provided in the container, and an electric heating device for applying a voltage between the pair of electrode portions to electrically heat the object to be processed contained in the container,
The container is formed in a bottomed cylindrical shape, and includes a stirring member that rotates around the central axis of the container and stirs the processing target in the container.
Each of the paired electrode portions is disposed on both sides of a plane including the central axis of the container, with a gap formed between the inner peripheral surface of the container,
Each of the paired electrode portions is divided into a plurality of portions around the central axis of the container, and the heating by heating is arranged so as to form a gap in which the object to be processed can move between the divided electrodes. apparatus.   Each of the electrodes is composed of a column-shaped long member, and is arranged by being inserted into the container from above the container so that the axis of each long member is parallel to the central axis of the container. The energization heating apparatus according to claim 1.   Each of the electrodes constituting each of the pair of electrode portions is curvedly arranged on a circumference around the central axis of the container so as to be symmetric with respect to a plane including the central axis of the container. The energization heating apparatus according to claim 2.   The energization heating apparatus according to any one of claims 1 to 3, wherein a current application unit applies a voltage between the pair of electrode units so that currents flowing through the electrodes have the same value.

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