JP2002334775A - Continuous high frequency heating device and continuous high frequency heating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous high frequency heating device effectively conducting continuous induction heating by preventing the generation of an arc in a spark sensitive part when high frequency AC current is applied to a plurality of continuously moving heating objects, and using a spark detecting method for accurately monitoring the generation of a spark. SOLUTION: A heating unit body formed by interposing a heating object between a pair of electrode parts, for example, a plurality of molds 7 filled with a molding raw material are continuously moved, and high frequency AC current is applied to them in a noncontact state from a heating zone. At that time, the generation of a spark in the heating unit body is detected with a spark detecting part 5. Although the spark detecting part 5 has a plurality of spark sensitive parts 53, etc., a filter 55 for a sensitive part is individually installed in the spark sensitive parts 53, etc., arranged in the positions corresponding to at least potential difference generating portions where potential difference generates between adjacent heating unit bodies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating apparatus and a high-frequency heating method that use high-frequency induction when heating a heating object disposed between electrodes.
In particular, the present invention relates to a continuous high-frequency heating apparatus and a continuous high-frequency heating method for applying dielectric heating to an object to be heated by applying a high-frequency alternating current to a plurality of continuously moving electrodes in a non-contact manner.

[0002]

2. Description of the Related Art Conventionally, a technique for producing a molded product by using a mold such as a mold, dispensing a molding material (raw material) into the mold and heating the mold (hereinafter, referred to as a mold). Molding method heating method) is widely used.

[0003] The above-mentioned molding die heating method is also widely used for producing molded baked confectionery including edible containers such as cones, corn, and wafers. In the technical field of manufacturing the above-mentioned molded baked confectionery, as a raw material, a dough obtained by mixing various starches as a main component and mixing it with water, for example, a viscoelastic dough (dough) or a slurry-like dough having fluidity is used. Are used.

[0004] The technical field of molding a water-containing raw material containing starch as a main component by a mold heating method is also applied to the field of producing biodegradable molded products in addition to molded baked goods. In the present specification, a molded product obtained by heat-forming a water-containing raw material containing starch or the like as a main component, such as the molded baked confectionery and the biodegradable molded product, is referred to as a baked product.

Here, in the above-mentioned molding die heating method, an external heating method in which a raw material is heat-formed by heat conduction by simply heating a mold has been used. However, in this external heating method, a uniform molding cannot be obtained because the molding time is long, the production efficiency is low, and "unevenness in baking" occurs due to uneven temperature of the molding die. Therefore, as a specific heating method in the mold heating method, a high-frequency heating method has recently been developed.

In the high-frequency heating method, generally, a high-frequency alternating current (hereinafter, abbreviated as high-frequency) is applied to an electrode portion to dielectrically heat an object to be heated. Therefore, there is an advantage that the object to be heated can be uniformly heated, and the heating can be easily controlled.

Specifically, in this technique, a pair of electrode portions is generally used in combination. One electrode section is a block of a supply electrode connected to a power supply section, and the other electrode section is a block of a ground electrode connected to the ground. Each block may consist of a single electrode or a plurality of electrode pieces. When a high frequency is applied, an object to be heated is sandwiched between these blocks, and these blocks are insulated from each other. Therefore, the object to be heated can be heated by the high frequency applied between these blocks.

Here, when conduction occurs between the supply electrode to be insulated and the ground electrode, a spark occurs between the respective electrode portions. This spark causes problems such as damage to the electrode portion and burning of the object to be heated. Therefore, usually, a spark detection circuit detects whether or not a spark occurs between the electrode portions. Specifically, the spark detection circuit determines whether there is continuity by applying a direct current between the above-described electrode portions and measuring a resistance value between the respective electrode portions, and based on the determination, determines whether a spark is generated. Is detected.

For example, as shown in FIG.
. A heating unit 10 having a heating object 14 sandwiched between 12;
Are fixed in the heating zone and allowed to stand, and a high frequency is applied from the power supply unit 2. At this time, the heating unit 10
The spark detection circuit 51 is connected to each block of the supply electrode and the ground electrode in, and the occurrence of spark is detected. In addition,
To prevent high frequency from flowing into the spark detection circuit 51,
A high frequency filter 52 is provided.

FIG. 1 is a circuit diagram showing the heating state.
A parallel circuit of capacitors as shown in FIG. More specifically, the portions corresponding to the respective heating units 10 are capacitors, and the capacitors are in a parallel state on the circuit. Condenser (heating unit 10)
The power supply unit 2 is connected to the electrode unit (supply electrode) 12 which constitutes the above, while the electrode unit (ground electrode) 13 is grounded. Further, a spark detection circuit 51 is also connected to each of the electrodes 12 and 13, and a high-frequency filter 52 is provided between the electrode (supply electrode) 12 and the spark detection circuit 51.
And a DC power supply unit 54 is interposed.

In the above configuration, the insulated electrode portion 12
The spark detection circuit 51 determines whether or not there is continuity during 13, that is, by applying a direct current in the heating unit 10. If there is continuity, the possibility of spark generation becomes very high.
In step 1, the application of the high frequency from the power supply unit 2 is stopped by, for example, outputting a control signal on the assumption that a spark is generated.

The technique using the high-frequency heating method is not a method of applying a high frequency with the heating unit 10 fixed as described above (fixed type), but a heating unit 10 that moves continuously. There has been proposed a continuous heating process in which a high-frequency wave is applied to the substrate. As an example of this, for example, a method and an apparatus for producing a biodegradable molded product disclosed in Japanese Patent Application Laid-Open No. Hei 10-230527 can be mentioned.

In the technique of the above publication, a large number of heating units 1
0 (for example, a mold) is sequentially moved by moving means such as a conveyor unit (conveyor means). Further, a heating zone for applying a high frequency is provided along a moving path of the heating unit 10, and the heating unit 1 moving there is provided.
A high frequency is applied to zero. A power supply unit for applying a high frequency is provided in the heating zone, and each heating unit 10 is provided with a power receiving unit to which the high frequency is supplied from the power supply unit. In this way, dielectric heating is caused in the moving heating unit 10 to realize continuous heating and molding.

[0014]

However, if the spark detection circuit 51 is diverted to the continuous heating process disclosed in the above publication, a direct current is applied to the heating unit 10.
At the moment when the contact terminal for applying voltage to a part of the supply electrode of the heating unit 10 comes into contact with or separates from the contact terminal, an arc is generated at this part.

Specifically, when the above-mentioned spark detection circuit 51 is applied to a continuous process, as shown in FIG.
A plurality of spark sensitivity sections (contact terminals) 53 are arranged along the movement path of the heating unit 10, and the spark sensitivity sections 5
Are brought into contact with an arbitrary position (power receiving unit 4 in FIG. 15) of the power supply electrode of the heating unit 10 from the power receiving unit 4 so that the spark detection circuit 51 detects the occurrence of spark. The power supply / reception unit 1 includes the power supply unit 3 and the power reception unit 4.
1 is formed. Further, a position where the spark sensitivity portions 53 contact each other, that is, an arbitrary position in the supply electrode of the heating unit 10 including the power receiving portion 4 is referred to as a spark sensitivity portion contact portion for convenience of description.

When the above structure is represented as a circuit diagram, as shown in FIG. 16, it is basically the same as the above-mentioned fixed circuit diagram (FIG. 14). Since a high frequency is applied, the power supply unit 3 and the power reception unit 4
That is, the power supply / reception unit 11 also forms a capacitor. The heating unit 10 is shown in FIGS.
Moves in the direction of the arrow in the figure.

In this configuration, in the continuous heating process, the heating unit 10 sequentially moves along the movement path. In this heating zone, the spark sensitivity section 53... Even so, it is arranged so as to contact at least one or more spark sensitivity parts 53.
Thereby, even in the continuous heating process, it is possible to continuously detect the spark in each heating unit 10 in the heating zone.

Here, the spark detection circuit 51 having the above configuration is used.
In the configuration of the above, when attention is paid to the single spark sensitivity section 53, the spark sensitivity section 53 and the power receiving section 4 are not always in contact with each other. The state will be repeated. Moreover,
In the continuous heating process, a large potential difference is generated between the adjacent heating units 10 and 10 (between the power receiving units 4 and 4) at the time when the heating units 10 enter and exit the heating zone, at the stage of initial heating, and the like. As a result, an arc is generated at the moment when the spark sensitivity section 53 comes into contact with or separates from the heating unit 10.

For example, as shown in FIG. 15, the heating unit 10-1 (leftmost heating unit 10 in the figure) immediately before entering the heating zone and the heating unit 10-1 entering the heating zone and applying a high frequency from the power supply unit 3 Unit 10-2 immediately after the start of heating
A large potential difference is generated between the heating unit 10 and the adjacent heating unit 10. Therefore, the low-potential heating unit 10- connected to the spark-sensitive part 53b that is in contact with the spark-sensitive part contact portion of the high-potential heating unit 10-2.
The potential of the spark sensitivity portion 53a before contact with the first spark sensitivity portion contact portion also increases. Therefore, at the moment when the spark sensitivity section 53a comes into contact with the heating unit 10-1, an arc is generated between the spark sensitivity section 53a and the heating unit 10-1.

When an arc is generated between the heating unit 10-1 and the spark sensitivity portion 53a, the spark detection circuit 51 operates abnormally, and the contact portion of the spark sensitivity portion 53a is damaged or defective. As a result, there arises a problem that the resistance value of this portion increases, and spark cannot be normally detected.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to apply an arc at a spark sensitivity section when applying a high-frequency alternating current to a plurality of continuously moving objects to be heated. By using a spark detection method that prevents the occurrence of sparks and accurately monitors for the occurrence of sparks,
It is an object of the present invention to provide a continuous high-frequency heating apparatus and a continuous high-frequency heating method for performing continuous dielectric heating more effectively.

[0022]

In order to solve the above-mentioned problems, a continuous high-frequency heating apparatus according to the present invention comprises: a heating unit having at least a pair of electrode portions provided with an object to be heated; The heating unit is provided with a plurality of conveyor means for continuously moving along the movement path, and a power supply means arranged corresponding to a heating area provided along the movement path, and is moving. In a continuous high-frequency heating device that heats an object to be heated by dielectric heating by continuously applying a high-frequency alternating current from the power supply unit to the heating unit in a non-contact manner, the presence or absence of sparks between the electrodes is further determined. It is provided with a spark detecting means for detecting, the spark detecting means, along the moving direction of the heating unit, so as to contact one of the electrode portions of the moving heating unit. A plurality of spark sensitivity portion disposed serial heating area near one of the plurality of spark sensitivity portion,
At least a high-frequency filter for a sensitivity unit separately provided for a spark sensitivity unit disposed at a position corresponding to a potential difference generation site where a potential difference occurs between adjacent heating units. .

According to the above configuration, it is possible to prevent a high-frequency AC current from flowing between the spark sensitive portions connected on the circuit, so that the spark sensitive portion contacts or separates from the contact portion of the heating unit body with the spark sensitive portion. It is possible to prevent the occurrence of an arc at the moment when it is performed. As a result, spark abnormality detection and damage to the spark sensitive portion can be effectively prevented.

In the continuous high-frequency heating apparatus according to the present invention, in addition to the above configuration, the potential difference generating portion includes an inlet portion which is the most upstream portion as viewed from the moving direction of the heating unit in the heating region; It is characterized in that the region includes an outlet portion which is the most downstream portion when viewed from the moving direction of the heating unit in the region.

At the inlet portion or the outlet portion, a heating unit to which a high-frequency alternating current is applied between adjacent heating units, and a heating unit to which no or no application has been performed. And exists. Therefore, a large potential difference easily occurs between these heating units,
According to the above configuration, by separately providing a high-frequency filter to each of the spark sensitivity sections disposed in this portion,
Since it is possible to more reliably prevent high-frequency AC current from flowing between the spark sensitive parts, it is possible to prevent arcing at the moment when the spark sensitive part comes into contact with or separates from the contact part of the heating unit body. it can.

In the continuous high-frequency heating apparatus according to the present invention, in addition to the above configuration, the high-frequency characteristic of the object to be heated changes abruptly in the potential difference generating portion with the progress of heating by applying a high frequency. It is characterized in that a part is included.

In a portion where the high-frequency characteristic of the object to be heated rapidly changes, a potential difference is easily generated between adjacent heating units even when a high-frequency alternating current is similarly applied. However, according to the above configuration, by separately providing a high-frequency filter for each of the spark sensitivity sections disposed in this portion, it is possible to more reliably prevent high-frequency AC current from flowing between the spark sensitivity sections. Arc generation at the moment when the spark sensitive portion contacts or separates from the contact portion of the heating unit body with the spark sensitive portion can be prevented.

The continuous high-frequency heating device according to the present invention is characterized in that, in addition to the above-described configuration, a high-frequency filter for a sensitivity section is individually provided for all of the plurality of spark sensitivity sections.

According to the above configuration, since the high-frequency filters are provided in all the spark sensitizing parts, not only those arranged in the parts where the potential difference is likely to occur, high-frequency AC is applied between the spark sensitizing parts connected on the circuit. It is possible to further reliably prevent the current from flowing. Therefore, arc generation at the moment when the spark sensitive portion contacts or separates from the contact portion of the heating unit body with the spark sensitive portion can be more reliably prevented.

[0030] In the continuous high-frequency heating structure according to the present invention, in addition to the above structure, the plurality of spark sensitivity sections are divided into a plurality of groups based on the potential difference generating portions, and spark detection is performed for each group. Means are provided.

According to the above configuration, by grouping, various conditions relating to spark detection can be changed for each group according to a change in the high-frequency characteristics of the object to be heated. Therefore, it is possible to reliably prevent high-frequency AC current from flowing between the spark sensitive portions, and thus it is possible to further reduce the occurrence of arc at the moment when the spark sensitive portion comes into contact with or separates from the contact portion of the heating unit body with the spark sensitive portion. It can be more reliably prevented, and furthermore, by setting a spark detection sensitivity suitable for each group,
The occurrence of spark can be detected more accurately.

[0032] In the continuous high-frequency heating apparatus according to the present invention, in addition to the above configuration, the spark detecting means further comprises:
A DC power supply unit that applies a DC current between the pair of electrode units is included, and the spark detection unit determines whether there is conduction from a resistance value between the electrode units to which the DC current is applied, It is characterized in that the occurrence of spark is detected based on the presence or absence of this conduction.

According to the above configuration, the resistance between the electrodes is measured from the DC current applied between the electrodes, and if the resistance is equal to or greater than the specified value, it is determined that there is no conduction.
If it is less than the specified value, it is determined that there is conduction. Moreover,
By monitoring the change in the resistance value, it is possible to predict the occurrence of a spark, and it is possible to prevent the occurrence of a spark. As described above, the occurrence of spark can be more reliably detected and prevented with a simple configuration by using the resistance value as a parameter instead of simply monitoring the presence or absence of conduction.

The continuous high-frequency heating apparatus according to the present invention is characterized in that, in addition to the above configuration, the electrode portion is a conductive mold, and the object to be heated is a raw material for molding. .

According to the above configuration, since the continuous high-frequency heating device according to the present invention is used for the purpose of producing a molded product by heat molding, a high-quality molded product can be produced with high production efficiency.

The continuous high-frequency heating apparatus according to the present invention has at least
It is characterized in that a starchy water-containing raw material having starch or water and having fluidity or plasticity is used, and a fired material is formed by dielectrically heating the forming raw material.

According to the above configuration, when the sintering product is manufactured by heat-molding the starchy water-containing raw material containing the starchy substance and the water, the continuous high-frequency heating apparatus according to the present invention is used. Can be manufactured with high production efficiency.

[0038] The continuous high-frequency heating apparatus according to the present invention is characterized in that, in the above configuration, flour is used as the starchy water-containing raw material, and the baked product is a molded baked confectionery mainly composed of flour. And

According to the above structure, the continuous high-frequency heating apparatus according to the present invention is used for producing a molded baked confectionery such as an edible container, a cookie or a biscuit by baking a starchy hydrated raw material using wheat flour as starch. To use
High-quality molded baked goods can be manufactured with high production efficiency.

In the continuous high-frequency heating apparatus according to the present invention, in addition to the above-described configuration, the power supply means has a rail shape continuously arranged along a heating area in a moving path, and the electrode portion is provided. Power supply means for supplying power from the power supply means, and a grounded electrode which is grounded. Further, the power supply electrode is provided with a power receiving means for receiving an alternating current from the rail-shaped power supply means in a non-contact manner. It is characterized by having.

According to the above configuration, the rail-shaped power supply means is provided in the heating area, and the power receiving means is provided so as to correspond to the rail-shaped power supply means. With the movement of the moving means, the heating unit provided with the power receiving means moves along the rail-shaped power supply means. Therefore, the heating / drying process can be smoothly and reliably continued until the heating unit passes through the heating area, that is, until the power receiving unit is removed from the power supply unit.

Further, in order to solve the above-mentioned problems, the continuous high-frequency heating method according to the present invention moves a heating unit having at least a pair of electrodes between which a heating object is arranged along a moving path. While continuously moving, a heating object is dielectrically applied by continuously applying a high-frequency alternating current to the moving heating unit in a non-contact manner from a heating area provided along the moving path. In the continuous high-frequency heating method of heating by heating, a plurality of spark sensitivity portions arranged in the vicinity of the heating region along the moving direction of the heating unit so as to contact one of the electrode portions of the moving heating unit. And, among the plurality of spark sensitivity sections, at least a spark sensitivity section disposed at a position corresponding to a potential difference generating portion where a potential difference occurs between adjacent heating units. The spark detection means including a high frequency filter for the sensitivity portion provided separately by the presence or absence of sparks between the electrodes is characterized in that it is detected.

According to the above method, it is possible to prevent a high-frequency AC current from flowing between the spark sensitive portions connected on the circuit, so that the spark sensitive portion contacts or separates from the contact portion of the heating unit with the spark sensitive portion. It is possible to prevent the occurrence of an arc at the moment when it is performed. As a result, spark abnormality detection and damage to the spark sensitive portion can be effectively prevented.

[0044]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] The first embodiment of the present invention will be described below with reference to FIGS. 1 to 8 and FIGS. 17 and 18. Note that the present invention is not limited to this.

The continuous high-frequency heating apparatus and method according to the present invention apply a high-frequency alternating current by passing a plurality of objects to be heated through a heating zone (high-frequency application zone) while continuously moving them. In a configuration for heating an object to be heated, a portion where a potential difference may occur between adjacent objects to be heated after providing a spark detection circuit for confirming that no spark is generated between electrodes sandwiching the object to be heated. A high frequency filter is individually provided for a typical circuit to prevent arcing.

The application to which the present invention is applied is an application in which a high-frequency alternating current is applied to cause dielectric heating of the object to be heated, particularly an application in which a plurality of objects to be heated are continuously and efficiently heated. It is not particularly limited as long as it is used, for example, to produce a hot molded product obtained by molding a raw material by heating, more specifically, an edible container such as a cone or a nakanaka for serving ice cream,
Alternatively, a particularly preferable example is a method of producing a molded baked confectionery which is baked into a predetermined shape such as cookies, biscuits, wafers, or the like, or a biodegradable molded product containing starch as a main component in a large amount and efficiently.

In the following description, a molded product obtained by heating and molding a starch-containing water-containing raw material containing starch as a main component, such as the above-mentioned molded baked confectionery and biodegradable molded product, is referred to as a fired product.

In the present embodiment, the present invention will be described in detail by taking as an example a case where the present invention is applied to a use for producing the above-mentioned fired product. In the following description, the continuous high-frequency heating method and the continuous high-frequency heating device will be appropriately abbreviated as a heating method and a heating device. In addition, high-frequency alternating current is also abbreviated to high-frequency as appropriate.

The heating device according to the present invention is, specifically,
As shown in the schematic circuit diagram of FIG. 2, a heating unit 1, a power supply unit (power supply unit) 2, and a spark detection unit (spark detection unit) 5 are provided. The heating unit 1 includes a power supply unit 3 and a plurality of heating units 10 corresponding thereto. In addition,
For convenience of explanation, FIG. 2 shows only one heating unit 10. The power supply unit 2 includes a high frequency generator 21, a matching circuit 22, and a control circuit 23.

The specific configuration of the high-frequency generator (oscillator) 21 is not particularly limited as long as it generates a high-frequency alternating current. For example, a conventionally known high-frequency oscillator such as a vacuum tube type oscillator is used. Can be used. This oscillator may include a matching circuit 22, a control circuit 23, and the like.

The matching circuit 22 has a configuration including, for example, a variable capacitor and a variable coil. The matching circuit 22 changes its capacitance and inductance in accordance with the object 14 to be heated.
An optimum output and tuning of a high frequency can be obtained. As a specific configuration of the variable capacitor or the variable coil, a conventionally known configuration is used and is not particularly limited. Further, the configuration of the matching circuit 22 is not limited to the above configuration including the variable capacitor and the variable coil.

The control circuit 23 is not particularly limited as long as it can appropriately control high-frequency output to the heating unit 1, that is, application of high-frequency to a heating zone (heating area) described later. Known control means can be used.

The heating unit 10 includes a pair of electrode portions 12.
13 and a power receiving unit 4 provided in the electrode unit 12, and a heating object 14 is provided between the electrode units 12 and 13.
Is pinched. The power receiving unit 4 and the power feeding unit 3
Thus, the power supply / reception unit 11 is configured.

The electrodes 12 and 13 are connected to the object 14 to be heated.
Are disposed so as to be insulated from each other, and the high frequency applied through the power supply / reception unit 11 causes the heating target 14 to perform dielectric heating. These electrode parts 12 and 13
Among them, the electrode unit 12 is a power supply electrode connected to the power supply / reception unit 11, and the electrode unit 13 is a ground electrode connected to the ground.

The more specific configuration of the supply electrode and the ground electrode, that is, the electrode portions 12 and 13 is not particularly limited, but in the present embodiment, the electrode portions 12 and 13 are formed as molds. The heating object 14 is a forming raw material (abbreviated as a raw material). Therefore, heating unit 10 in the present embodiment refers to a mold in which raw materials are charged.

The spark detecting section 5 is connected between the control circuit 23 and the heating section 1 and includes the electrode sections 12 and 13.
Detects the occurrence of a spark between them. Specifically, the spark detection unit 5 includes a spark detection circuit 51, a high-frequency filter 52, a spark sensitivity unit 53, and a DC power supply unit 5.
The spark detection circuit 51 is connected to the electrode section 12 on the supply electrode side (described later) via the spark sensitivity section 53 and the power receiving section 4. Also, the spark sensitivity section 53
A high-frequency filter 52 and a DC power supply unit 54 are interposed between the power supply and the spark detection circuit 51. Further, the spark detection circuit 51 and the electrode 13 on the side of the ground electrode (described later) are directly connected without any particular circuit.

The spark detection circuit 51 detects whether or not a spark is generated between the electrode portions 12 and 13 as described later. There is no particular limitation as long as a control signal for instructing to stop the application of can be output. Generally, a configuration is used in which the presence or absence of conduction is determined by measuring the resistance value between the direct currents applied between the electrode portions 12 and 13 to measure the resistance between them, and the occurrence of spark is detected from this. Used.

In the spark detection circuit 51 having the above configuration, if the measured resistance value is equal to or more than the specified value, it is determined that there is no conduction. If there is no continuity, no spark is generated, so that no control signal is particularly output to the control circuit 23. On the other hand, if the resistance value is less than the specified value, it is determined that there is conduction. If there is continuity, the possibility of spark generation becomes very high, so that a control signal for instructing the control circuit 23 to stop applying high frequency is output.

The control circuit 23 cuts off the high frequency supplied from the high frequency generator 21 based on this signal, and stops the application of the high frequency. As a result, it is possible to effectively prevent damage to the electrode section 12 due to sparks, scorching of the heating object 14, and the like.

The high-frequency filter 52 is not particularly limited as long as it is an electric circuit that allows the direct current to flow but does not allow the high frequency to flow. The high frequency filter 52 is grounded via a capacitor. The detailed function of the high frequency filter 52 will be described later.

In the present embodiment, the spark sensitivity section 53 is connected to the power supply section 4 from the power receiving section 4 to the power supply electrode (electrode section 1) of the heating unit 10.
2) While contacting an arbitrary position as shown in FIG.
The configuration is not particularly limited as long as the configuration is such that a direct current can be applied to 13. In the present embodiment, as described later, the power receiving unit 4 has a flat plate shape, and thus, for example, a leaf spring-shaped contact terminal is used.

The spark sensitivity section 53 is not in direct contact with the main body of the heating unit 10, but is provided at an arbitrary electrode provided on the supply electrode (electrode section 11) of the heating unit 10, such as the power receiving section 4. It comes into contact with the position. Therefore, the heating unit 10 with which the spark sensitivity section 53 contacts
The arbitrary position of the supply electrode in the above, for convenience of description,
It is the contact part of the spark sensitivity part. Of course, the power receiving unit 4 is included in the contact portion of the spark sensitivity unit. As will be described later, the occurrence of the potential difference causes the spark sensitivity section 5
A spark is generated between the heating unit 3 and the heating unit 10, and a portion where the spark is actually generated is the above-described contact portion of the spark sensitivity portion.

Further, as will be described later, in the heating zone, a plurality of the above-described spark sensitivity sections 53 are arranged at equal intervals. To the spark sensitivity unit 53
Are not particularly limited as long as they are arranged so that at least one of them can be contacted. That is, in a state where the plurality of heating units 10 are continuously moving in the heating zone, at least one or more spark sensitivity units 53 always contact each heating unit 10. Just do it.

The DC power supply unit 54 includes electrode units 12 and 13.
There is no particular limitation as long as it can output a DC current that can measure the resistance value between them.

The specific configuration of the spark detector 5 is not limited to the configuration in which the occurrence of spark is detected from the presence or absence of conduction using the resistance value as a parameter as described above. Can be used. However, it is more preferable that the resistance value is used as a parameter.

Specifically, the electrode portions 12 and 13 are determined based on the resistance value.
In addition to detecting the occurrence of sparks by judging the conduction between them, it is also possible to predict the occurrence of sparks by monitoring the change in resistance value, thereby preventing the occurrence of sparks before they occur Can be. Therefore, the occurrence of spark can be more reliably detected and prevented with a simple configuration by using a resistance value as a parameter instead of simply monitoring the presence or absence of conduction.

In this embodiment, the electrode portions 12 and 13
Is a conductive mold, and generally, a mold made of various metals is preferably used. The specific shape of the mold is not particularly limited, and a shape according to the shape of the molded product is used. Further, this mold can be divided into two blocks so as to correspond to the supply electrode and the ground electrode, regardless of the specific shape.

Specifically, for example, if the molded product is a cup cone for serving ice cream or soft ice cream, an inner mold piece 7a for molding the inner surface of the cup cone as shown in FIG. And an external mold piece 7b for molding the outer surface of the mold.

The shape of the molding die is not limited to the configuration of the die 7, but three or more mold pieces may be used depending on the shape of the molded product and the method of taking out the molded product after molding. However, even in such a case, it can be divided into a supply electrode block and a ground electrode block. This makes it possible to reliably apply a high frequency to the raw material to be heated.

Since the mold 7 serves as the electrode portions 12 and 13 in the heating unit 10, a high frequency is applied. For this reason, the supply electrode (inner mold piece 7a) as the electrode section 12 constituting the mold 7 and the ground electrode (external mold piece 7b) as the electrode section 13 do not directly contact. Specifically, an insulating section 70 is provided between them.

The insulating portion 70 is not particularly limited as long as it prevents contact between the supply electrode and the ground electrode, but various insulators are generally used. Alternatively, depending on the shape of the molded product, a space may be formed instead of disposing the insulator.

The mold 7 in the present embodiment may be provided with a steam vent (not shown) for adjusting the internal pressure. In a fired product obtained by heating and molding a starch-containing water-containing raw material, which will be described later, since the dough as the raw material contains starch and moisture, steam must be discharged out of the mold 7 with the progress of heating. However, steam may not be discharged depending on the shape of the mold 7. Therefore, by providing a steam vent in the mold 7, the steam is
It can escape to the outside and adjust the internal pressure well. The specific configuration of the steam vent is not particularly limited, and may be any shape, size, number, and position where the steam can be uniformly and efficiently discharged out of the mold 7. .

Further, the entire heating section 1 including the mold 7 is a chamber depending on the properties of the molding raw material and the molded product, etc., so that the inside of the heating section 1 can be depressurized by a vacuum pump. Good.

In the present invention, the mold 7 can be continuously moved by the moving means, and the continuous heating is performed on the mold 7 to which the molding material has been dispensed. The moving means is not particularly limited, but a conveyor section (a conveyor means / transporting means) represented by a belt conveyor is particularly preferably used from the viewpoint of the productivity of the molded product.

The method for producing a molded product to which the present invention is applied includes at least the following three steps. That is,
A raw material injecting step of injecting the raw material into the mold 7, a heating step of applying a high frequency to the die 7 into which the raw material has been injected to generate dielectric heating and heat forming, and forming the molded product from the heat-formed mold 7. This is a molded product removal process. Therefore, a material injection zone, a heating zone, and a molded product removal zone are respectively set along the moving direction of the mold 7 by the conveyor unit.

The heating zone is provided with the power supply section (power supply means) 3, and the mold 7 is provided with a power reception section (power reception means) corresponding to the power supply section 3. Then, as shown in FIG. 2, the power supply / reception unit 11 is configured by the power supply unit 3 and the power reception unit 4.

The more specific configuration of the power supply unit 3 is not particularly limited. For example, the power supply unit 3 is formed of a conductive material such as a metal, and as shown in FIG. The cross section has a U-shape and has a concave portion 31 at the center. In other words, the rectangular plate-like member is bent at two fold lines parallel to the longitudinal direction so as to form the side portions 32, 32 facing each other and the upper surface portion 33 connecting the side portions 32, 32, thereby forming a "U". A shape formed in a U-shaped cross section can be mentioned.

On the other hand, a more specific configuration of power receiving unit 4 corresponding thereto is not particularly limited as long as high-frequency power can be received in a non-contact manner with power feeding unit 3. For example, as shown in FIGS. 4 (a), (b), and (c), a flat plate-like configuration that is sandwiched in a non-contact manner between the opposed side portions 32 can be given. The power receiving unit 4 may be formed of a conductive material such as a metal similarly to the power feeding unit 3.

Here, since the power supply section 3 is provided along the shape of the conveyor section, that is, along the movement path of the mold 7, over the entire heating zone,
It can also be expressed as being arranged in a rail-like configuration having a U-shaped cross section. Then, as shown in FIG.
Has a shape corresponding to the rail-shaped power supply unit 3,
Connected to electrode unit 12.

As described above, in the present embodiment, the power supply / reception unit 11 is constituted by the combination of the rail-shaped power supply unit 3 and the plate-shaped power reception unit 4 which form a “U” -shaped cross section. . Therefore, when the mold 7 enters the heating zone by the conveyance of the conveyor unit, the flat power receiving unit 4 is sandwiched in the recess 31 of the rail-shaped power supply unit 3 in a non-contact manner. Then, the power receiving unit 4 is moved along the rail-shaped power supply unit 3 along with the conveyance of the conveyor unit.
Moves (in the directions of the arrows in FIGS. 4A and 4C).

At this time, in the concave portion 31 of the power feeding portion 3, a capacitor is formed by the power receiving portion 4, the side portions 32 sandwiching the power receiving portion 4, and the space therebetween. As a result, power supply from the power supply unit 2 to the mold 7 is started, and the heating / drying process is started by dielectric heating. afterwards,
Until the mold 7 passes through the heating zone B, that is, the power supply unit 3
The heating / drying process can be smoothly and reliably continued until the power receiving unit 4 comes off from the concave portion 31 of FIG.

The specific configurations of the power supply unit 3 and the power receiving unit 4 are not limited to the above-described configurations.
That is, the shapes of the power supply unit 3 and the power reception unit 4 are appropriately changed depending on the blending of the raw materials and the final shape of the molded product, or the way of generating dielectric heating is changed by including other members. You may. For example, an insulator may be provided between the power receiving unit 4 and the side surfaces 32 to further improve the function as a capacitor.

Therefore, the non-contact power supply in the present invention means that the power supply unit 3 and the power receiving unit 4 (electrode unit 12) are not in direct contact with each other. If the power supply / reception unit 11 supplies power in a non-contact manner as described above, the electrodes do not come into direct contact with each other, so that it is possible to avoid the occurrence of spark or the like in the power supply / reception unit 11 in the heating zone.

In the present embodiment, the molded product produced by applying the present invention is a baked product such as a molded baked confectionery containing an edible container such as a cone or a biodegradable molded product as described above. I have. The specific shape of the fired product is not particularly limited, and may include various shapes depending on the use of the fired product.

For example, as the cone, FIG.
A conical cup cone 8a as shown in (a) and (b) can be used. The specific size of these cones is not particularly limited.

The raw material of the above-mentioned fired product (the heating object 1
The method 4) is not particularly limited. In the present embodiment, starch is a main component, and various auxiliary components are added according to other uses, and these are added to and mixed with water to form a plastic dough or a fluid slurry. The starchy water-containing raw material described above can be suitably used.

For example, in the case of a molded baked confectionery containing an edible container such as the above-mentioned corn, generally, flour is used as the starch component of the above-mentioned main component, and other starches such as corn starch can also be used. Furthermore, as additives, seasonings such as salt and sugar, emulsifiers such as oils and fats, flavors, coloring agents, stabilizers, leavening agents, thickeners, and various additives such as flavor enhancers can be used. These subcomponents are
It is appropriately selected according to the type of molded baked confectionery and the like, and is not particularly limited.

The starch as the main component includes at least plant-derived starch (refined starch) and processed agricultural products containing starch such as flour (coarse starch). Further, the starch may include a chemically modified starch obtained by subjecting starch to chemical treatment or the like, such as crosslinked starch.

In the heating apparatus according to the present invention, as shown in FIG. 1, a plurality of dies 7 are continuously moved by a conveyor section to a heating zone in which a rail-shaped power supply section 3 is provided. Conveyed in the direction. In addition, since the raw material is dispensed into the mold 7, the heating unit body 10 is composed of the mold 7 and the dispensed raw material.
For convenience, the mold 7 is shown as a heating unit 10. As a result, a high frequency is sequentially applied to the mold 7 (heating unit body 10), dielectric heating occurs in the raw material to be heated 14, and the heat molding is performed.

Further, a plurality of spark sensitivity sections 53 are arranged at equal intervals near the power supply section 3 and along the movement path of the mold 7 as described above. Mold 7
The power receiving unit 4 that moves with the movement of the
Contact 3 sequentially. That is, when attention is paid to one of the plurality of spark sensitivity sections 53..., The mold 7 moves sequentially with respect to the spark sensitivity section 53, so that the spark sensitivity section 53 and the mold 7 ( Power receiving unit 4)
Means that the contact state and the non-contact state are continuously repeated.

With the above configuration of the spark detector 5, it is possible to allow a DC current to flow from the spark sensitivity unit 53 to the continuously moving mold 7. Therefore, the occurrence of spark can be detected by the spark detection circuit 51.

Here, in the present invention, of the plurality of spark sensitivity portions 53 arranged along the moving path, a portion where a potential difference occurs between adjacent molds 7 (potential difference generating portion). The high-frequency filters are individually provided for the arranged spark sensitivity sections 53. In FIG. 1, the spark sensitivity sections 53... Arranged at both ends of the power supply section 3, that is, at the positions corresponding to the vicinity of the entrance and the vicinity of the exit of the heating zone, are individually set to the high-frequency filters 55 (hereinafter, referred to as spark sensitivity sections). , Abbreviated as a filter for the sensitivity section).

FIG. 6 is a circuit diagram showing the heating state.
It becomes a parallel circuit of a capacitor as shown in FIG. Specifically, a part corresponding to the power supply / reception unit 11 and a part corresponding to each mold 7 are capacitors, and the capacitors are in parallel on the circuit. Individual power receiving / receiving unit 11
And the capacitor to be the mold 7 are respectively connected in series. More specifically, power supply / reception unit 11
The capacitor to be used is composed of a power supply unit 3 and a power receiving unit 4, and the capacitor to be the mold 7 is connected to the electrode unit 12.
(The inner mold piece 7a) and the electrode portion 13 (the outer mold piece 7).
b).

The above-mentioned spark detection circuit 51
1, which is connected to the power receiving unit 4 of the capacitor to be the mold 1 and the electrode unit 13 on the ground electrode side of the capacitor to be the mold 7, so that a direct current can be applied to the capacitor to be the mold 7. ing. Further, between the power receiving unit 4 and the spark detection circuit 51, among the capacitors in the power supply / reception unit 11 and in parallel with each other, the capacitors at both ends are individually provided with the sensitivity unit filters 55. I have.

The sensitivity section filter 55 is a filter means different from the high frequency filter 52 provided for the spark detection circuit 51. Therefore, as shown in FIGS. 1 and 6, the high-frequency filter 52 is connected in series with all of the spark sensitivity sections 53... And the spark detection circuit 51 (and the DC power supply section 54). Is connected in series with the individual spark sensitivity unit 53, the high frequency filter 52, the DC power supply unit 54, and the spark detection circuit 51,
Further, the filters 55 for the respective sensitivity sections are connected in parallel.

In this configuration, even if a large potential difference occurs between the dies 7, 7, it is possible to prevent a high frequency from flowing between the adjacent spark sensitive portions 53 connected on the circuit. Can be. Therefore, at the moment when the spark sensitive portion 53 comes into contact with or separates from the spark sensitive portion contact portion of the mold 7, it is possible to prevent the occurrence of an arc in that portion.

In the present embodiment, at least the following three locations can be cited as potential difference generating portions where a potential difference occurs between the adjacent dies 7. In the following description, upstream (side) or downstream (side) as viewed from the moving direction of the mold 7 is simply referred to as upstream (side) or downstream (side).

That is, as a portion (potential difference generating portion) where the potential difference between the adjacent dies 7 becomes large (potential difference generating portion), the portion located at the uppermost stream of the heating zone, that is, the dies 7 enter a region where the power supply portion 3 is located. At the front and rear parts (hereinafter referred to as an entrance part) and immediately downstream of the entrance part, the heating object 14
Where the high-frequency characteristics of the forming raw material rapidly change (hereinafter referred to as an initial heating site) and a site at the most downstream of the heating zone, that is, before and after the mold 7 exits from a region where the power supply unit 3 exists. 3 (hereinafter referred to as the exit site)
Places.

The prevention of the occurrence of the arc will be described more specifically, including the portion where the potential difference becomes large. FIG.
As shown in FIG.
Is conveyed to the heating zone by the conveyor in the direction of the arrow in the figure. Here, in FIG. 17A, the dies 7a, 7b, and 7c are from the downstream side. That is, the dies 7a, 7b, and 7c are set from the top in the order of movement. The position immediately before the heating zone is referred to as position a, the position immediately after entering the heating zone is referred to as position b, and the position immediately downstream of position b and located completely within the heating zone is referred to as position b. C.

Looking at the potential of the mold 7 at the positions A to C, as shown in the potential graph of FIG. 17B, the potential increases from the position A toward C. That is, since the mold 7c at the position a has not yet reached the heating zone, no high frequency is applied from the power supply unit 3 via the power reception unit 4. Therefore, the potential of the mold 7c at the position A becomes almost 0V.

However, in the mold 7b located at the position (b) immediately upstream of the position (a), since the heater 7 is approaching the heating zone, the power supply unit 3 and the power reception unit 4 partially overlap each other, and the power supply unit From 3 the application of the high frequency has already started. Therefore, the potential of the mold 7b position B becomes sufficiently high V _1.

Further, the mold 7a located at the position C immediately upstream of the position B is completely in the heating zone, and the power supply unit 3 and the power receiving unit 4 are completely overlapped. 3 to apply a high frequency in a complete state. for that reason,
The potential of the mold 7a at the position c becomes V _{2 which} is higher than the potential of the mold 7b at the position b.

As a result, three adjacent molds 7a to 7c
In the first potential difference occurs in V ₁ between the mold 7c · 7b, the potential difference V ₂ -V ₁ occurs between the mold 7b · 7a. Since the potential difference becomes very large depending on the output of the power supply unit 2, for example, the spark sensitivity unit 53a disposed on the most upstream side in the vicinity of the position A is connected to the spark sensitivity unit connected on the circuit. Not only does the high frequency flow from 53b, but also the mold 7a
Because the potential is higher than that of the spark sensitivity portion 53d
Therefore, a high frequency partly flows back to the spark sensitivity part 53a (arrow B in the figure), and the spark sensitivity part 53a has a high potential. Therefore, between the mold 7c located immediately upstream of the position A, thereby causing the V ₁ or more large potential difference.

Therefore, when the dies 7a to 7c are conveyed to the entrance portion, the first dies 7a (or the next dies 7a to 7c) are conveyed.
b) enters the heating zone and the next mold 7b (or mold 7)
When c) approaches the heating zone, the contact portion of the spark sensitivity portion of the mold 7b (or the mold 7c) is
At the moment of contact with 3a, a spark is generated between the spark sensitivity portion 53a having a large potential difference and the spark sensitivity portion contact portion of the mold 7c, and as a result, an arc is generated. A similar phenomenon occurs at the exit site.

Therefore, as shown in FIG. 1 and FIG. 6, a sensitivity section filter 55 is separately provided between the spark sensitivity section 53 and the spark detection circuit 51 arranged near the entrance and exit. As a result, even if a large potential difference occurs between the adjacent molds 7, 7 as described above, the high frequency is prevented from flowing backward. As a result, generation of an arc can be prevented.

Next, it is assumed that the mold 7 has further advanced from the state shown in FIGS. 17 (a) and (b), that is, the molds 7 have further advanced from the entrance portion into the heating zone and have reached the initial heating portion. At this time, as shown in FIG. 18A, the leading mold 7a has reached the position d immediately downstream of the position c, and the molds 7b and 7c have reached the positions c and b, respectively. Assume that the mold 7d following the mold 7c has moved to the position a.

Looking at the potential of the mold 7 at the positions A to D, a large potential difference occurs between the position C and the position D, as shown in the potential graph of FIG. Note that FIG.
In the potential graphs of FIG. 18B and FIG. 18B, the potentials are relatively described for the sake of convenience in order to clarify the potential difference at each position, and show an accurate numerical relationship. Not something.

In FIG. 18B, the mold 7d at the position A
Is almost 0 V as described above. Then, the mold 7c and 7b at positions B and C, of course, is more potential V ₂ of the mold 7b at a position C higher than the potential V ₁ of the metal mold 7c in the position B, the In this case, it can be considered that the application of the high frequency has progressed to some extent, and the potential difference between the position B and the position C has become small.

[0109] Here, in the mold 7a position two, given simply but should potential is higher than the mold 7b position Ha, in fact, the potential V ₃ significantly than V ₂ Lower.

This is because the raw material for molding used in the present embodiment is a starchy water-containing raw material containing flour and starches as main components. That is, in the above-mentioned starches hydrous material, in the initial stage of heating, since the properties change significantly, in position B or C is a phase of the first phase of the high frequency applied, potentials as high as V ₁ and V ₂ state it becomes a, a position two, for a rapid change in properties, the potential becomes lower with V _3.

As a result, a potential difference of V ₂ -V ₃ is generated between the mold 7a at the position d and the mold 7b at the position c. Since the potential difference is very large depending on the output of the power supply unit 2, for example, the spark sensitivity unit 53f is disposed at the position corresponding to the position d, and the spark sensitivity unit 53f is disposed immediately upstream thereof at the position corresponding to the position c. The large potential difference V ₂ -V ₃ is generated between the spark sensitive portion 53e and the spark sensitive portion 53e.

Therefore, in the process of moving the mold 7a further downstream from the position d, at the moment when the contact portion of the spark sensitive portion of the mold 7a is separated from the spark sensitive portion 53f, the spark sensitive portions 53e and 53f connected on the circuit are connected. A high frequency flows in between (arrow B in the figure) and the spark sensitivity section 53f
A spark is generated between the metal mold 7a and the contact portion of the spark sensitivity portion, and as a result, an arc is generated.

Therefore, as shown in the schematic explanatory view of FIG. 7 and the circuit diagram of FIG. 8, not only the spark sensitive portions 53 arranged near the entrance and the exit, but also the spark at the position corresponding to the initial heating region. It is preferable to separately provide a sensitivity filter 55 between the sensitivity unit 53 and the spark detection circuit 51. As a result, the adjacent molds 7, 7
Even if a large potential difference occurs between them, a high frequency backflow is avoided. As a result, generation of an arc can be prevented.

FIGS. 7 and 8 have substantially the same structure as FIGS. 1 and 6 except that a sensitivity section filter 55 is provided for the spark sensitivity section 53 corresponding to the initial heating portion. Therefore, the detailed description is omitted.

As described above, according to the present invention, when a spark detector is provided for a heating device that applies high frequency to a continuously moving mold to perform heating, the mold is used for spark detection. A high-frequency filter is individually provided in each of the plurality of spark sensitivity parts that are in contact with each other and located at a position corresponding to a part where the potential difference between adjacent molds is large. As a result, high frequency can be prevented from flowing between the spark sensitivity parts connected on the circuit,
It is possible to prevent an arc from being generated between the spark sensitive portion and the contact portion of the mold with the spark sensitive portion.

[Embodiment 2] The following will describe a second embodiment of the present invention with reference to FIGS. Note that the present invention is not limited to this. Further, for convenience of explanation, members having the same functions as those used in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

In the first embodiment, among the plurality of spark sensitivity portions 53, only the spark sensitivity portions 53 arranged at a portion where a potential difference occurs between adjacent molds 7, 7 are provided. Are provided, but in the present embodiment, the sensitivity section filters 55 are provided in all the spark sensitivity sections 53.

More specifically, as shown in FIGS. 9 and 10, all of the plurality of spark sensitivity sections 53 arranged along the movement path are individually subjected to sensitivity section filters 55.
Is provided. In this configuration, it is not necessary to provide the high-frequency filter 52 provided for the spark detection circuit 51 as in the configuration in the first embodiment.

That is, as in the present embodiment, when all the spark sensitivity sections 53 are provided with the sensitivity section filters 55, all of these sensitivity section filters 55 are connected in series with the spark detection circuit 51. It is connected to. Therefore, the sensitivity section filters 55 not only function as a filter for blocking the flow of high frequency between the spark sensitivity sections 53, but also block the high frequency flowing to the spark detection circuit 51, similarly to the high frequency filter 52. Also works as a filter. Therefore, it is not necessary to provide the high frequency filter 52.

In the first embodiment, the sensitivity section filters 55 are provided only at the inlet and outlet portions where the potential difference easily occurs between the dies 7 and 7 or at the initial heating portion. As a result, the number of the sensitivity section filters 55 can be reduced as much as possible, so that the cost can be reduced. However, since the potential difference does not necessarily occur at any other part than the above, the occurrence of the arc can be reduced. It may not be enough to ensure prevention.

On the other hand, in the present embodiment, the sensitivity filters 55...
Is provided, so that even if a potential difference occurs in any part between all the molds 7 moving in the heating zone, it is possible to prevent a high frequency from flowing between the spark sensitivity parts 53. Can be. As a result, generation of an arc can be more reliably prevented.

Therefore, it is not particularly limited which of the first and second embodiments is preferable, and it differs depending on the use conditions of the heating device. For example, when the apparatus is very large, the heating zone becomes very long, so that the configuration of the first embodiment in which the spark sensitivity sections 53 are provided in a small number is preferable. However, when the apparatus is small, In the case where it is desired to reliably suppress the occurrence of arc in the spark sensitivity section 53 in the heating process, the configuration of the present embodiment is more preferable.

In the configuration shown in FIGS. 9 and 10,
Although only one spark detection circuit 51 (and DC power supply unit 54) is provided for the heating zone, a plurality of spark detection circuits 51 (and DC power supply unit 54) may be provided for the heating zone, for example, as shown in FIGS. . In FIGS. 11 and 12,
For example, the spark sensitivity portions 53 corresponding to the entrance portion and the initial heating portion and the spark sensitivity portions 53 at other positions are independent as a first group and a second group, respectively. The first group of spark sensitivity sections 53 are connected to the spark detection circuit 51a,
a of the second group spark sensitivity section 53
Are connected to the spark detection circuit 51b to form the second spark detection unit 5b.

In the present embodiment, as in the first embodiment, a starch-containing hydrated raw material is used as a raw material for molding. However, this starch-containing hydrated raw material contains water and an electrolyte such as salt. There is. In this case, at the time of starting the heating, the above-mentioned raw material contains sufficient moisture, and thus exhibits high electric conductivity due to the action of the electrolyte.At the time of the initial heating, the electric conductivity increases with the temperature rise. However, as the moisture evaporates, the electrical conductivity drops sharply and eventually becomes almost an insulator.

Therefore, in the mold 7 that moves continuously with respect to the first group, the raw material exhibits high electrical conductivity, and therefore, the first spark detection circuit 51a in the first spark detection section 5a does not generate a spark. It is preferable to set a lower resistance value, which is a parameter for detection. On the other hand, in the second group, since the electric conductivity has decreased and is substantially approaching the insulator by passing through the initial heating part, the second spark detection circuit 51b in the second spark detection unit 5b has It is preferable to set the resistance value higher.

Therefore, as shown in FIG. 11 and FIG. 12, the above-mentioned inlet part and the initial heating part are separated from other parts, and each of the spark detectors detects the spark in accordance with the high-frequency characteristics of the raw material. If conditions are set, spark detection can be performed more accurately.
As a result, it is possible to more reliably prevent the high frequency from flowing between the spark sensitivity portions 53 and 53, so that the occurrence of an arc between the spark sensitivity portion 53 and the contact portion of the mold 7 with the spark sensitivity portion 53 is reduced. It can be reliably prevented.

Of course, the configuration in which the spark sensitivity sections 53 are divided into a plurality of groups is such that only the spark sensitivity sections 53 corresponding to the entrance portion and the initial heating portion are independent as shown in FIGS. The present invention is not limited to this, and it is only necessary that a portion where it is preferable to change various conditions relating to spark detection according to a change in high-frequency characteristics of a raw material is separately grouped.

9 to 12, all the spark sensitivity sections 53 are provided with sensitivity section filters 55, and a high frequency filter 52 for the spark detection circuit 51 is provided.
Since the configuration is substantially the same as that of FIG. 1 and FIGS. 6 to 8 except for omitting, a specific description thereof will be omitted.

As described above, in the present embodiment, when a spark detector is provided for a heating device that applies a high frequency to a continuously moving mold and heats, a spark detector is provided for spark detection. A high-frequency filter is individually provided for all of the plurality of spark sensitivity portions that come into contact with the mold. by this,
Since it is possible to more reliably prevent the high frequency from flowing between the spark sensitivity parts connected on the circuit, it is possible to more reliably prevent the occurrence of an arc between the spark sensitivity part and the contact part of the mold with the spark sensitivity part. Can be prevented.

[0130]

As described above, the continuous high-frequency heating apparatus according to the present invention includes the spark detecting means for detecting the presence or absence of spark between at least a pair of electrodes, and the spark detecting means moves. As to be in contact with one of the electrode portions in the heating unit, a plurality of spark sensitivity portions arranged in the vicinity of the heating region along the moving direction of the heating unit, and, among the plurality of spark sensitivity portions,
At least a high-frequency filter for a sensitivity unit that is individually provided for a spark sensitivity unit that is disposed at a position corresponding to a potential difference generation site where a potential difference occurs between adjacent heating units.

According to the above configuration, it is possible to prevent a high-frequency AC current from flowing between the spark sensitive portions connected on the circuit, so that the spark sensitive portion contacts or separates from the contact portion of the heating unit body with the spark sensitive portion. It is possible to prevent the occurrence of an arc at the moment of the slip. As a result, there is an effect that the abnormality detection of the spark and the damage of the spark sensitive portion can be effectively prevented.

In the continuous high-frequency heating apparatus according to the present invention, in addition to the above configuration, the potential difference generating portion includes an inlet portion which is the most upstream portion as viewed from the moving direction of the heating unit in the heating region; This is a configuration that includes an outlet portion that is the most downstream portion when viewed from the moving direction of the heating unit in the region.

Further, in the continuous high-frequency heating apparatus according to the present invention, in addition to the above configuration, the high-frequency characteristics of the object to be heated are abruptly increased at the potential difference generating portion with the progress of heating by applying a high frequency. This is a configuration that includes a changing part.

According to the above configuration, by separately providing a high-frequency filter for each of the spark sensitivity sections disposed in at least one of the above-described portions, it is possible to prevent a high-frequency AC current from flowing between the spark sensitivity sections. Since it can be avoided reliably, there is an effect that it is possible to prevent an arc from being generated at the moment when the spark sensitive portion comes into contact with or separates from the contact portion of the heating unit body with the spark sensitive portion.

The continuous high-frequency heating device according to the present invention has a configuration in which, in addition to the above-described configuration, a high-frequency filter for a sensitivity unit is individually provided for all of the plurality of spark sensitivity units.

According to the above configuration, since the high-frequency filters are provided in all the spark sensitizing parts, not only those arranged in the part where the potential difference is likely to occur, high-frequency AC is provided between the spark sensitizing parts connected on the circuit. It is possible to further reliably prevent the current from flowing. Therefore, there is an effect that it is possible to more reliably prevent arc generation at the moment when the spark sensitive portion comes into contact with or separates from the contact portion of the heating unit body.

In the continuous high-frequency heating structure according to the present invention, in addition to the above structure, the plurality of spark sensitivity sections are divided into a plurality of groups based on the potential difference generating portions, and a spark detection section is provided for each group. This is a configuration in which means are provided.

According to the above configuration, by grouping, various conditions relating to spark detection can be changed for each group according to a change in the high frequency characteristics of the object to be heated. Therefore, it is possible to reliably prevent high-frequency AC current from flowing between the spark sensitive portions, and thus it is possible to further reduce the occurrence of arc at the moment when the spark sensitive portion comes into contact with or separates from the contact portion of the heating unit body with the spark sensitive portion. It can be more reliably prevented, and furthermore, by setting a spark detection sensitivity suitable for each group,
There is an effect that the occurrence of spark can be detected more accurately.

In the continuous high-frequency heating apparatus according to the present invention, in addition to the above configuration, the spark detecting means further comprises:
A DC power supply unit that applies a DC current between the pair of electrode units is included, and the spark detection unit determines whether there is conduction from a resistance value between the electrode units to which the DC current is applied, The configuration is such that the occurrence of spark is detected based on the presence or absence of this conduction.

According to the above configuration, since the resistance value is used as a parameter, the occurrence of spark can be more reliably detected with a simple configuration, rather than simply monitoring the presence or absence of conduction.
In addition, there is an effect that it can be prevented.

The continuous high-frequency heating apparatus according to the present invention has a configuration in which, in addition to the above configuration, the electrode portion is a conductive mold, and the object to be heated is a raw material for molding.

According to the above configuration, since the continuous high-frequency heating apparatus according to the present invention is used for the purpose of producing a molded product by heat molding, it is possible to produce a high-quality molded product with high production efficiency. .

The continuous high-frequency heating apparatus according to the present invention has at least
In this configuration, a starchy water-containing raw material having starch or water and having fluidity or plasticity is used, and a fired material is formed by dielectrically heating the forming raw material.

According to the above configuration, when a baked product is manufactured by heat-molding the starch-containing hydrated raw material containing starch and water, the continuous high-frequency heating apparatus according to the present invention is used. Can be manufactured with high production efficiency.

[0145] The continuous high-frequency heating apparatus according to the present invention has the above-mentioned configuration, wherein wheat flour is used as the starch-based water-containing raw material, and the calcined product is a molded baked confectionery mainly composed of flour. .

According to the above arrangement, the continuous high-frequency heating apparatus according to the present invention is used in the case of producing a molded baked confectionery such as an edible container, a cookie or a biscuit by baking a starchy water-containing raw material using wheat flour as starch. To use
There is an effect that high-quality molded baked confectionery can be manufactured with high production efficiency.

In the continuous high-frequency heating apparatus according to the present invention, in addition to the above configuration, the power supply means is formed in a rail shape continuously disposed along a heating area in a moving path, and the electrode portion is provided. Power supply means for supplying power from the power supply means, and a grounded electrode which is grounded. Further, the power supply electrode is provided with a power receiving means for receiving an alternating current from the rail-shaped power supply means in a non-contact manner. Configuration.

According to the above configuration, the rail-shaped power supply means is provided in the heating area, and the power receiving means is provided so as to correspond to the rail-shaped power supply means. With the movement of the moving means, the heating unit provided with the power receiving means moves along the rail-shaped power supply means. Therefore, there is an effect that the heating / drying process can be smoothly and reliably continued until the heating unit passes through the heating area, that is, until the power receiving unit is removed from the power supply unit.

In the continuous high-frequency heating method according to the present invention, as described above, a high-frequency alternating current is continuously applied to the heating unit moving in the heating area in a non-contact manner, so that the object to be heated is heated. In the method of heating by dielectric heating, a plurality of spark sensitivity portions arranged in the vicinity of the heating region along the moving direction of the heating unit, so as to contact one of the electrode portions in the moving heating unit, Among the plurality of spark sensitivity sections, at least, a high frequency filter for the sensitivity section separately provided for the spark sensitivity section disposed at a position corresponding to a potential difference occurrence site where a potential difference occurs between adjacent heating units. The presence / absence of spark generation between the electrodes is detected by spark detection means including the following.

According to the above method, it is possible to prevent a high-frequency AC current from flowing between the spark sensitive portions connected on the circuit, so that the spark sensitive portion contacts or separates from the contact portion of the heating unit body with the spark sensitive portion. It is possible to prevent the occurrence of an arc at the moment of the slip. As a result, it is possible to effectively prevent spark abnormality detection and spark sensitivity section damage.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating an example of a schematic configuration of a main part of a heating device according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing a schematic configuration of the entire heating device shown in FIG.

FIG. 3 is an explanatory diagram illustrating an example of a mold and a power supply / reception unit used in the heating device illustrated in FIG. 1;

4 (a), (b) and (c) are explanatory views showing the configuration of a power supply / reception unit included in the heating device shown in FIG.

FIG. 5A is an overhead view showing an example of a configuration of a cup cone as a molded product manufactured by the heating device according to the present invention, and FIG. 5B is an AA arrow of FIG. FIG.

6 is a circuit diagram schematically corresponding to a main part of the heating device shown in FIG.

FIG. 7 is an explanatory view showing another example of a main part of the heating device shown in FIG. 1;

8 is a circuit diagram schematically corresponding to a main part of the heating device shown in FIG.

FIG. 9 is an explanatory diagram illustrating an example of a schematic configuration of a main part of a heating device according to a second embodiment of the present invention.

FIG. 10 is a circuit diagram schematically corresponding to a main part of the heating device shown in FIG. 9;

FIG. 11 is an explanatory view showing another example of a main part of the heating device shown in FIG. 9;

12 is a circuit diagram schematically corresponding to a main part of the heating device shown in FIG.

FIG. 13 is an explanatory diagram showing a schematic configuration of a main part of a conventional heating device.

FIG. 14 is a circuit diagram schematically corresponding to a main part of the conventional heating device shown in FIG.

FIG. 15 is an explanatory diagram showing a schematic configuration of a main part when the conventional heating device shown in FIG. 13 is applied to a continuous heating device.

16 is a circuit diagram schematically corresponding to a main part of the heating device shown in FIG.

17A is an explanatory view illustrating an example of a state in which a potential difference occurs between the dies in the heating device shown in FIG. 15, and FIG. 17B is a diagram corresponding to the position of the dies in FIG. 4 is a graph showing a potential to be applied.

18A is an explanatory diagram illustrating another example of a state in which a potential difference occurs between the dies in the heating device illustrated in FIG. 15, and FIG. 18B is a diagram illustrating positions of the dies in FIG. 5 is a graph showing a potential corresponding to FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Heating part 2 Power supply part (power supply means) 3 Power supply part (power supply means) 4 Power reception part (power reception means) 5 Spark detection part (spark detection means) 5a 1st spark detection part (spark detection means) 5b 2nd spark detection part (Spark detecting means) 7 Mold (mold) 8a Cup cone (fired product) 10 Heating unit 12 Electrode unit 13 Electrode unit 14 Heating object 51 Spark detection circuit 51a First spark detection circuit 51b Second spark detection circuit 52 High frequency filter 53 Spark sensitivity part 54 DC power supply part 55 High frequency filter for spark sensitivity part (Filter for sensitivity part)

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshiyuki Otani 1-139-305, Baba, Nagaokakyo-shi, Kyoto (72) Inventor Naoki Okuda 2-21, Nitta-Higashihonmachi, Daito-shi, Osaka (72) Inventor Tomoya Tamura 1-27-27, Incheon, Takarazuka-shi, Hyogo (72) Inventor Taizo Karasawa 1-2-1-6, Yamatedai, Ibaraki-shi, Osaka (72) Inventor Toshitaka Haruta 1-67-1-405, Minamikusuha, Hirakata-shi, Osaka 72) Inventor Yoshio Akasaka 6-3-12 Kamishio, Tennoji-ku, Osaka City, Osaka Prefecture Inside the Yamamoto Binita Co., Ltd. 72) Inventor Tsuneo Nagata 6-3-12 Kamishio, Tennoji-ku, Osaka City, Osaka Prefecture Inside Yamamoto Binita Co., Ltd. (72) Yasushi Yamamoto 6-3-12, Kamio, Tennoji-ku, Osaka City, Osaka Nita Co., Ltd. in the F-term (reference) 3K086 AA05 AA10 BA09 CA20 EA06 3K090 AA03 AA11 AB01 BA06 CA30 EA03 4B014 GP14

Claims (11)

[Claims] 1. A heating unit in which an object to be heated is disposed between at least a pair of electrode portions; a moving means for continuously moving a plurality of heating units along a moving path; Power supply means arranged corresponding to a heating area provided along the path, by continuously applying a high-frequency AC current from the power supply means to the moving heating unit in a non-contact manner. A continuous high-frequency heating device for dielectrically heating the object to be heated, further comprising spark detection means for detecting the presence or absence of sparks between the electrodes, wherein the spark detection means comprises the electrode portion of the moving heating unit A plurality of spark sensitizers disposed in the vicinity of the heating area along the moving direction of the heating unit so as to contact one of the plurality of spark sensitizers, Also includes a high-frequency filter for a sensitivity unit that is separately provided for a spark sensitivity unit that is arranged at a position corresponding to a potential difference generation site where a potential difference occurs between adjacent heating units. Continuous high frequency heating device. 2. The electric potential difference generating part includes an inlet part which is the most upstream part when viewed from the moving direction of the heating unit in the heating area, and a most downstream part when viewed from the moving direction of the heating unit in the heating area. The continuous high-frequency heating device according to claim 1, further comprising an outlet portion which is a portion of the continuous high-frequency heating device. 3. The device according to claim 1, wherein the potential difference generating portion includes a portion where the high-frequency characteristic of the object to be heated changes rapidly with the progress of heating by applying a high frequency. Or the continuous high-frequency heating device according to 2. 4. The continuous high-frequency heating apparatus according to claim 1, wherein a high-frequency filter for the sensitivity section is individually provided for all of the plurality of spark sensitivity sections. 5. The apparatus according to claim 1, wherein said plurality of spark sensitivity sections are divided into a plurality of groups based on said potential difference generating portions, and a spark detecting means is provided for each group. 5. The continuous high-frequency heating device according to any one of items 4 to 4. 6. The spark detecting means further includes a DC power supply section for applying a DC current between the pair of electrode sections, and the spark detecting means includes a DC power supply section to which the DC current is applied. The continuous high-frequency heating apparatus according to any one of claims 1 to 5, wherein the presence or absence of conduction is determined from a resistance value between the portions, and the occurrence of spark is detected based on the presence or absence of conduction. 7. The continuous electrode according to claim 1, wherein the electrode part is a conductive mold, and the object to be heated is a raw material for molding. High frequency heating device. 8. As the raw material for molding, a hydrous starchy material having fluidity or plasticity containing at least starch and water is used, and a fired material is formed by dielectrically heating the raw material for molding. The continuous high-frequency heating device according to claim 7, wherein the heating is performed. 9. The continuous high-frequency heating apparatus according to claim 8, wherein wheat flour is used as the starchy material of the starch-containing water-containing raw material, and the baked product is a baked confectionery mainly composed of flour. 10. The power supply means has a rail shape continuously arranged along a heating area in a moving path, and the electrode portion is connected to a power supply electrode supplied from the power supply means and grounded. 10. A power receiving means for receiving an alternating current from the rail-shaped power feeding means in a non-contact manner, wherein the power feeding electrode further comprises a power receiving means. Item 2. The continuous high-frequency heating device according to Item 1. 11. A heating area provided along a moving path while continuously moving a plurality of heating units each having an object to be heated disposed between at least a pair of electrode parts along the moving path. From, in the continuous high-frequency heating method of dielectrically heating the object to be heated by continuously applying a high-frequency alternating current to the moving heating unit in a non-contact manner, one of the electrode portions in the moving heating unit A plurality of spark sensitizers arranged in the vicinity of the heating region along the moving direction of the heating unit, and at least, among the plurality of spark sensitizers, between adjacent heating units. And a high-frequency filter for a sensitivity unit separately provided for a spark sensitivity unit disposed at a position corresponding to a potential difference generation site where a potential difference occurs in the spark detection unit. And a method for detecting the occurrence of sparks between the electrodes.