JP2019076191A - Electric field treatment fryer - Google Patents

Abstract

A power supply device used in an electric field processing fryer is reduced in size and weight. A high voltage electric field is applied to a fat and oil heating medium, and a high voltage electric field of an electric field processing fryer that performs electric field heating processing of food is supplied from a DC high voltage power source. For DC high voltage generation, an igniter that generates a DC high voltage from a sawtooth wave, an igniter that generates a DC high voltage from a square wave, a half-wave rectification cock-Croft Walton circuit, and a double-wave rectification cock-Croft Walton circuit are used. Is done. These DC high voltage generation circuits are extremely small and light compared to conventional transformers, and the supplied current is small enough to allow battery driving, so that they are safe. [Selection] Figure 6

Description

  The present invention relates to an electric field treatment fryer that applies an electric field when heat-processing food in a heated edible oil.

  An apparatus for heating and processing food with edible oil includes an electric field treatment fryer that performs electric field heating and processing of food by applying an electric field by commercial alternating current of over 6000 V to a fat and oil heating medium such as edible oil.

It is considered that the electric field treatment fryer reforms the fat as a heating medium by an electric field of high voltage alternating voltage, and the food or food to be treated is subjected to electric field heat processing by the modified fat.
A prior art electric field treatment fryer will be described with reference to FIGS.

FIG. 1 is a structural conceptual view of the electric field treatment fryer according to Patent 5386346, wherein (a) is a front sectional view and (b) is a top sectional view.
This electric field treatment fryer has an outer container which is an edible oil storage container and an inner container which is an oil permeable container, and a high voltage commercial alternating current is applied between the outer container and the inner container. At this time, the outer container is grounded.

In this figure, 1 is an outer container which is a bottomed rectangular solid shape whose upper part is opened and which is made of a metal plate such as stainless steel in which a heating medium such as edible oil is accommodated.
An inner container 2 is an open-topped bottomed rectangular solid shape and is an internal container made of a metal plate such as stainless steel, and is made of a metal mesh or punching metal so as to be permeable to a heating medium such as edible oil.
The inner container 2 is housed inside the outer container 1 at a distance via the insulator 3, and the outer container 1 and the inner container 2 are electrically separated by the insulator 3.

An outer lid 4 and an inner lid 5 respectively corresponding to the outer container 1 and the inner container 2 are provided, and an insulator 6 is interposed between the outer lid 4 and the inner lid 5.
The outer lid 4 is made of a stainless steel plate or the like as the outer container 1, and the inner lid 5 is made of a wire mesh or punching metal like the inner container 2.
During electric field treatment and heating, the outer lid 4 and the inner lid 5 are closed, at which time the outer lid 4 is electrically connected to the outer container 2 and the inner lid 5 is electrically connected to the inner container 2.

  A commercial alternating current high voltage of 6800 V boosted by a transformer from a commercial alternating current power supply is supplied between the outer container 1 and the inner container 2 from a power supply device 8 described later with reference to FIG.

A sheathed heater 7 is disposed outside the bottom of the outer container 1 as a heat source.
The sheath heater 7 may be disposed outside the bottom of the outer container 1, outside the side of the outer container 1, inside the bottom of the outer container 1, or inside the side of the outer container 1.
Electric power for heating is supplied to the sheathed heater 7 from a commercial AC power supply.

  In the sheathed heater 7, a nichrome wire heater is housed in a metal heater pipe, and an insulating powder such as magnesium oxide is filled in the heater pipe so that the nichrome wire heater and the heater pipe are electrically insulated. Is sealed with an insulator.

FIG. 2 is a structural conceptual view of the improved electric field treatment flyer of Patent 5970297, wherein (a) is a front sectional view and (b) is a top sectional view.
This electric field treatment fryer has an outer container which is an edible oil storage container and an inner container which is an oil permeable container, and a high voltage commercial alternating current is applied between the outer container and the inner container.
Furthermore, it has an intermediate container which is not electrically connected to either container between the outer container and the inner container.
At this time, the outer container is grounded.

In this figure, 1 is an outer container which is a bottomed rectangular solid shape whose upper part is opened and which is made of a metal plate such as stainless steel in which a heating medium such as edible oil is accommodated.
An inner container 2 is an open-topped bottomed rectangular parallelepiped shape and is an internal container made of a metal plate such as stainless steel, and is made of a metal mesh or punching metal so as to be permeable to a heating medium such as edible oil.
Reference numeral 9 denotes a bottomed rectangular parallelepiped having an open upper portion, which is an intermediate container made of a metal plate such as stainless steel disposed between the outer container and the inner container so that a heating medium such as edible oil can permeate It is made of wire mesh or punching metal.
An insulator 3 is interposed between the outer container 1 and the middle container 9, and the middle container 2 and the inner container 2, and the outer container 1, the middle container 9 and the inner container 2 are electrically separated.

An outer lid 4, an inner lid 10 and an inner lid 5 are provided corresponding to the outer container 1, the intermediate container 9 and the inner container 2 respectively, and between the outer lid 4 and the inner lid 10, the inner lid 10 and the inner lid 5 The insulator 6 is interposed between them, and the outer lid 1, the inner lid 9 and the inner lid 2 are electrically separated.
The outer lid 4 is made of a stainless steel plate or the like as the outer container 1, and the inner lid 10 and the inner lid 5 are made of a wire mesh or a punching metal like the inner container 2.
During electric field treatment and heating, the outer lid 4 and the inner lid 5 are closed, at which time the outer lid 4 is electrically connected to the outer container 2 and the inner lid 5 is electrically connected to the inner container 2.

  A commercial alternating current high voltage of 6800 V boosted by a transformer from a commercial alternating current power supply is supplied between the outer container 1 and the inner container 2 from a power supply device 8 described later with reference to FIG.

A sheathed heater 7 is disposed outside the bottom of the outer container 1 as a heat source.
The sheath heater 7 may be disposed outside the bottom of the outer container 1, outside the side of the outer container 1, inside the bottom of the outer container 1, or inside the side of the outer container 1.
Electric power for heating is supplied to the sheathed heater 7 from a commercial AC power supply.

  In the sheathed heater 7, a nichrome wire heater is housed in a metal heater pipe, and an insulating powder such as magnesium oxide is filled in the heater pipe so that the nichrome wire heater and the heater pipe are electrically insulated. Is sealed with an insulator.

As a heat source, a high frequency induction (IH) heater disclosed in JP-A-2017-113250 can be used in addition to the sheathed heater.
Next, an electric field treatment fryer using an IH heater will be described.

FIG. 3 is a conceptual view of an electric field treatment fryer structure using an IH heater corresponding to the electric field treatment fryer using the sheathed heater shown in FIG. 1, (a) is a front sectional view, (b) is a top sectional view. .
This electric field treatment fryer also has an outer container which is an oil container and an inner container which is an oil permeable container, the outer container is grounded, and a commercial alternating current high voltage is applied between the outer container and the inner container.

In this figure, reference numeral 11 denotes an outer container made of a magnetic stainless steel plate having a rectangular parallelepiped shape with an open top and containing an edible oil as a heating medium.
An inner container 12 is in the form of a rectangular parallelepiped having an open top and made of wire mesh or punching metal so as to be permeable to the modified edible oil as a heating medium.
The inner container 12 is housed inside the outer container 11 at a distance via the insulator 13, and the outer container 11 and the inner container 12 are electrically separated by the insulator 13.

An outer lid 14 and an inner lid 15 respectively corresponding to the outer container 11 and the inner container 12 are provided, and an insulator 16 is interposed between the outer lid 14 and the inner lid 15.
The outer lid 4 is formed of a stainless steel plate or the like as the outer container 11, and the inner lid 15 is formed of a wire mesh or a perforated metal plate similarly to the inner container 12.
During electric field treatment and heating, the outer lid 14 and the inner lid 15 are closed, at which time the outer lid 14 is electrically connected to the outer container 12 and the inner lid 15 is electrically connected to the inner container 12.

  A commercial alternating current high voltage boosted to 6800 V by a transformer from a commercial AC power supply of AC 100 V is supplied between the outer container 11 and the inner container 12 from a power supply device 8 described later with reference to FIG.

A high frequency induction heating coil 17 is disposed outside the bottom of the outer container 11 as a heat source.
The arrangement of the high frequency induction heating coil 17 may be arranged outside the bottom of the outer container 11, outside the side of the outer container 11, inside the bottom of the outer container 11, or inside the side of the outer container 11.

  A high frequency current of, for example, 200 kHz is supplied to the high frequency induction heating coil 17, an induced current is induced in the outer vessel 11 which is magnetic stainless steel by the high frequency current, and the induced vessel generates heat.

  It is needless to say that high frequency induction heating can be adopted for the electric field treatment fryer having the intermediate container described in FIG. 2, and further description will be omitted because it is bothersome.

The conventionally used power supply device will be described with reference to FIG.
In this figure, (a) is a schematic configuration explanatory view of the power supply device of the embodiment, (b) is a waveform explanatory view of a commercial alternating current to be input, (c) is a current supplied to the electrodes of the electric field treatment fryer FIG.

This power supply unit is simply configured by only the transformer 8.
The commercial AC 100 V shown in (b) is supplied to the primary side winding of the transformer 8, the commercial AC 6800 V is outputted from the secondary side winding, and the external container 1 of the electric field treatment fryer from the output terminals 21 and 22 , 11 and the inner container 2, 12 are supplied with commercial alternating current AC 6800 V shown in (c).
Since the external containers 1 and 11 are places touched by the operator of the electric field treatment fryer, the output terminals connected to the external containers 1 and 11, for example, the output terminal 22 are grounded as a measure against electric shock.

Patent 5386346 gazette Patent No. 5970297 JP, 2017-113250, A

  The ratio of the number of turns on the primary side to the number of turns on the secondary side is 1:68 for a transformer in which 100V AC is supplied to the primary winding of the transformer and 6800V AC is output from the secondary winding. And big. Therefore, assuming that the number of windings on the primary side is 500, the number of windings on the secondary side is 34000.

Such a large secondary side winding number transformer must be large, and considering the increase in winding resistance due to the increase in the number of turns and the output voltage drop due to the increase in inductance, The diameter of the wire has to be increased, and the transformer has to be larger.
The power for power is supplied at 200 V and the power for light is supplied at 100 V, which are supplied after being stepped down from 6600 V by a pole transformer attached to the utility pole. As understood from the pole transformer, the final volume of the transformer is 13 l and the weight is 9.6 kg, considering the insulation measures by using 6800 V.
Not only that, the increase of the wire diameter leads to the increase of the maximum output, and the damage from the electric leakage and the electric shock accident becomes large.

  In the present application, it is an object of the present invention not only to reduce the size and weight of the power supply device for supplying a high voltage to the electric field treatment fryer but also to reduce the damage caused by the leakage and the electric shock accident.

So far, it has been considered that only an alternating voltage of 6000 V or more obtained by boosting a commercial alternating current is effective for the electric field treatment in the electric field treatment fryer. As a result, only large-volume and heavy-weight commercial AC transformers were inevitably used.
As a result of investigations by the present inventors who have doubts about this, as a result of testing the usability of power supply devices other than commercial alternating current transformers, it was found that electric field treatment can be performed also by high direct current voltage.

  A flyback transformer or a multistage voltage doubler rectifier circuit is used as a means for obtaining a DC high voltage constantly.

Since the electric field treatment fryer does not consume power for the electric field treatment in principle, the power supply used is a high voltage / small current. By employing a flyback transformer or a multistage voltage doubler rectifier circuit for high voltage generation, the power supply device of the electric field treatment fryer can be compact and lightweight.
In addition, the damage is small even if an electric shock accident or an electric leakage accident occurs due to the small DC current.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front cross-sectional view and a top cross-sectional view of a prior art electric field treatment fryer. Front sectional view and a top sectional view of another prior art electric field treatment fryer. Front sectional drawing and top sectional drawing of the further another electric field processing fryer of prior art. Front sectional drawing and top sectional drawing of the further another electric field processing fryer of prior art. Explanatory drawing of the power supply device for electric field processing flyers of a prior art. Explanatory drawing of the power supply device for electric field processing flyers of this invention Example 1. FIG. Explanatory drawing of the power supply device for electric field processing flyers of this invention Example 2. FIG. Explanatory drawing of the power supply device for electric field processing flyers of this invention Example 3. FIG. Explanatory drawing of the power supply device for electric field processing flyers of this invention Example 4. FIG.

  Examples of the invention according to this application will be described below.

FIG. 6 shows an electric field treatment fryer to which the power supply device of Example 1 is applied.
In this figure, (a) is a front sectional view and a top sectional view of an electric field treatment fryer having the same basic configuration as the conventional one described in FIG. 1 and FIG. 3 to which the power supply device of Embodiment 1 is applied, b) A front sectional view and a top sectional view of an electric field treatment fryer having an improved configuration in common with the conventional one described in FIG. 2 and FIG. 4 to which the power supply device of the first embodiment is applied; (D) and (e) are voltage waveforms at intermediate stages, and (f) is a voltage waveform supplied to the electric field treatment fryer main body.

  This power supply device obtains a pulse voltage of negative polarity from the sawtooth wave which is the output of the sawtooth wave generation circuit by the differentiation circuit, boosts the obtained pulse voltage by the booster circuit, and obtains the DC high voltage obtained by the electric field treatment fryer Supply to the body.

In (a), 31 is an outer container which is a bottomed rectangular solid shape whose upper part is opened and which is formed of a stainless steel plate or the like in which a heating medium such as edible oil is accommodated.
Reference numeral 32 denotes a rectangular parallelepiped whose upper portion is open, and is an inner container made of wire mesh or punching metal so as to be permeable to a heating medium such as edible oil.
The inner container 32 is housed inside the outer container 1 with a space between them via the insulator 33, and the outer container 31 and the inner container 32 are electrically separated by the insulator 33.

An outer lid 34 and an inner lid 35 respectively corresponding to the outer container 31 and the inner container 32 are provided, and an insulator 6 is interposed between the outer lid 34 and the inner lid 35.
The outer lid 34 is formed of a stainless steel plate or the like as the outer container 31, and the inner lid 35 is formed of a wire mesh or a perforated metal plate similarly to the inner container 32.
During the electric field treatment and heating process, the outer lid 34 and the inner lid 35 are closed, at which time the outer lid 34 is electrically connected to the outer container 32 and the inner lid 5 is electrically connected to the inner container 32.

  The shapes of the outer container 31 and the inner container 32 are cylindrical as well as rectangular.

  A DC pulse current shown in (f) is supplied between the outer container 31 and the inner container 32 from the power supply device shown in (c).

A sheathed heater (not shown) is disposed outside the bottom of the outer container 31 as a heat source.
The sheath heater may be arranged outside the bottom of the outer container 31, outside the side of the outer container 31, inside the bottom of the outer container 31, or inside the side of the outer container 31.

A high frequency induction heating coil disposed outside the bottom of the outer container 31 can also be used as a heat source instead of the sheathed heater.
The arrangement of the high frequency induction heating coil may be outside the bottom of the outer container 31, outside the side of the outer container 31, inside the bottom of the outer container 31, or inside the side of the outer container 31.

In (b), the reference numeral 31 denotes an outer container having a rectangular parallelepiped shape with an open upper portion and made of a stainless steel plate or the like in which a heating medium such as edible oil is accommodated.
An inner container 32 is made of a wire mesh or punching metal so as to be permeable to a modified edible oil which is a heating medium.

Between the outer container 31 and the inner container 32, an intermediate container 39 which is not connected to either the outer container 31 or the inner container 32 is disposed.
Between the outer lid 34 and the inner lid 35, an intermediate lid 40 which is not connected to either the outer lid 34 or the inner lid 35 is disposed.
The intermediate container 3 and the intermediate lid 40 are made of wire mesh or punching metal so as to be permeable to the modified edible oil which is a heating medium.

  The outer container 31, the middle container 39, the middle container 39, and the inner container 32 are insulated by the insulator 33, and the outer lid 34, the middle lid 40, the middle lid 40 and the inner lid 35 are insulated by the insulator 36.

  The shapes of the outer container 31, the intermediate container 39 and the inner container 32 are cylindrical as well as rectangular.

  A DC pulse current shown in (f) is supplied between the outer container 31 and the inner container 32 from the power supply device shown in (c).

A sheathed heater (not shown) is disposed outside the bottom of the outer container 31 as a heat source.
The sheath heater may be arranged outside the bottom of the outer container 31, outside the side of the outer container 31, inside the bottom of the outer container 31, or inside the side of the outer container 31.

A high frequency induction heating coil disposed outside the bottom of the outer container 31 can also be used as a heat source instead of the sheathed heater.
The arrangement of the high frequency induction heating coil may be outside the bottom of the outer container 31, outside the side of the outer container 31, inside the bottom of the outer container 31, or inside the side of the outer container 31.

The power supply device shown in (c) can be driven by two AA batteries as a minimum configuration.
An arbitrary sawtooth generation circuit 41 generates a sawtooth shown in (d).
Reference numeral 42 denotes a differentiating circuit, which obtains the negative pulse shown in (e) by the trailing edge of the sawtooth shown in (b).
43 is a well-known flyback transformer booster circuit, which raises the negative pulse shown in (c) to obtain a DC high voltage pulse, and from the output terminals 44, 45 to the outer electrode and the inner electrode of the electric field treatment fryer Supply a DC high voltage pulse.

The igniter, which is often used for igniters in household gas cooking appliances, uses a dry cell as a power source and generates a high voltage using a flyback transformer.
This igniter is by far smaller in volume and weight than a power source for an electric field treatment fryer having a volume of 13 liters and a weight of 9.6 kg.

FIG. 7 shows a power supply device of an electric field treatment fryer according to a second embodiment of the present invention.
In the description of this embodiment, since the electric field treatment fryer main body is common to that of the first embodiment, the description thereof will not be repeated.
In this figure, (a) is a schematic block diagram of a power supply device, (b) to (d) are voltage waveforms at intermediate stages, and (e) is a voltage waveform supplied to the electric field treatment fryer main body.

  This power supply device obtains positive and negative pulse voltages from the square that is the output of the square wave generation circuit by the differentiation circuit, and rectifies the obtained positive and negative pulse voltages by the double wave rectification circuit, and obtains the negative pulse. Is boosted by a booster circuit, and the obtained DC high voltage is supplied to the electric field treatment fryer main body.

The power supply device shown in (a) can be driven by two AA batteries as a minimum configuration.
An arbitrary square wave generating circuit 51 generates a sawtooth wave shown in (d).
52 is a differentiating circuit, and the negative pulse shown in (c) is obtained by the falling edge of the square wave shown in (b) and the negative pulse shown in (c) by the rising edge.
53 is a both-wave rectifier circuit, and obtains a negative pulse train shown in (d).
54 is a well-known flyback transformer booster circuit, which boosts the negative pulse shown in (d) to obtain a DC high voltage pulse, and from the output terminals 55, 56 to the outer electrode and the inner electrode of the electric field treatment fryer Supply a DC high voltage pulse.

FIG. 8 shows a power supply device of an electric field treatment fryer according to a third embodiment of the present invention.
In the description of this embodiment, since the electric field treatment fryer main body is common to that of the first embodiment, the description thereof will not be repeated.
In this figure, (a) is a schematic block diagram of the power supply device, (b) is a voltage waveform at an intermediate stage, and (c) is a voltage waveform supplied to the electric field treatment fryer main body.

The power supply apparatus shown in this figure is a power supply apparatus which performs multistage voltage doubling half wave rectification on the output of the oscillation circuit and supplies the obtained high DC voltage to the electric field treatment fryer.
This power supply device can be driven by two AA batteries as a minimum configuration.
In this figure, reference numeral 61 denotes an arbitrary oscillation circuit, which generates an alternating voltage of 100 V, 30 kHz as shown in (b).

62 is a multistage voltage doubler half wave rectification circuit, which generates 5700 V DC high voltage shown in (c) including 100 V and 30 kHz pulse current, and the obtained DC high voltage from output terminals 63 and 64 of the electric field treatment fryer It supplies the external electrode 31 and the internal electrode 32.
Multistage half-wave voltage doubler rectifier circuit A specific configuration is a six-stage cock-croft-Walton circuit.

  This circuit is a famous circuit that made it possible for Cock-Croft and Walton to receive the Nobel Prize, and it is an extremely simple circuit in which voltage doubler rectifier circuits composed of one diode and one capacitor are multistaged. is there.

  The Cock-Croft-Walton circuit does not require special components and can not only obtain a DC high voltage of 10000 V with a simple circuit, but since the internal current consumption of these circuits is small, battery drive is possible. For two hours, it is possible to supply 10000 V DC high voltage to the electric field treatment fryer with two AA batteries.

  The electric field processing fryer equipped with this power supply unit mounts a conventional power supply unit with a volume of 13 liters and a weight of 9.6 kg although it uses an ultra-compact, ultra-lightweight power supply unit with a volume of 0.1 liter and a weight of 0.17 kg. It has an electric field treatment effect superior to that of the power supply.

FIG. 9 shows a power supply circuit according to a fourth embodiment of the present invention.
In the description of this embodiment, since the electric field treatment fryer main body is common to that of the first embodiment, the description thereof will not be repeated.
In this figure, (a) is a schematic block diagram of the power supply device, (b) is a voltage waveform at an intermediate stage, and (c) is a voltage waveform supplied to the electric field treatment fryer main body.

This power supply device performs multistage voltage doubling full wave rectification on the output of an appropriate oscillation circuit, and supplies the obtained DC high voltage to the electric field treatment fryer.
An arbitrary oscillation circuit 61 generates an alternating voltage of 100 V and 30 kHz as shown in (b).
65 is a multistage voltage doubler full wave rectification circuit, and generates 5700 V DC voltage including 100 V, 30 kHz pulsating current shown in (c), and from the output terminals 66 and 67 external electrode 31 and internal electrode 32 of electric field treatment fryer Supply to
The multistage voltage doubler full wave rectification circuit is configured by connecting in parallel the ones with different polarities of the multistage half wave voltage doubler rectification circuit adopted in the second embodiment.

  The electric field treatment fryer according to the present invention is suitable for general food processing equipment which heats and processes using oil such as tempura and agar as well as ordinary fryers used in restaurants and the like.

  In the electric field treatment fryer of the embodiment described, the electrodes are arranged concentrically, but other flat plate electrodes are parallel to the electric field treatment fryer, and semi-cylindrical electrodes face each other. However, it is needless to say that the power supply apparatus of the embodiment can be applied to these electric field treatment flyers.

DESCRIPTION OF SYMBOLS 1, 11 outer container 2, 12 inner container 3, 13, 6, 16 insulator 4, 14 outer lid 5, 15 inner lid 7 sheathed heater 8, 18 power source for electric field generation 9, 19 intermediate container 10, 20 intermediate lid 17 Electromagnetic induction coil 21 Transformers 22, 23.24, 45, 55, 56, 56, 64, 66, 67 output terminal 41 sawtooth wave generation circuit 42 differentiation circuit 43 boost circuit 51 square wave generation circuit 61 oscillation circuit 62 multistage voltage doubling Half-wave rectifier circuit 65 Multistage voltage doubling full-wave rectifier circuit

Claims (5)

An electric field treatment fryer that applies electric field heating processing to food by applying a high voltage electric field to a fat and oil heating medium,
An electric field treatment fryer characterized in that the high voltage electric field is supplied from a direct current high voltage power supply. The electric field treatment fryer according to claim 1, wherein the DC high voltage power supply is an igniter for generating a DC high voltage from sawtooth waves. An electric field treatment fryer according to claim 1, wherein said DC high voltage power source is an igniter for generating a DC high voltage from a square wave. The electric field treatment fryer according to claim 1, wherein the direct current high voltage power supply is a half wave rectification cock-croft-Walton circuit. An electric field treatment fryer according to claim 1, wherein said direct current high voltage power supply is a two-wave rectifier cock-croft-Walton circuit.

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