JP4627797B2 - Edible oil oxidation prevention device high potential generating plate and edible oil oxidation prevention device - Google Patents

Description

  The present invention relates to a high potential generating plate and an edible oil oxidation preventing device for an edible oil antioxidant that suppresses oxidation of edible oil by applying a minus high voltage to the edible oil filled in a fryer oil tank.

  Conventionally, edible oil has been used in ordinary households, restaurants, food processors, and the like to cook and process food materials. Regarding the handling of this edible oil, it is generally desirable to use a raw material having an acid value (AV value) of 1 or less as an edible oil for hygienic reasons.

If it is recognized that the edible oil in use is significantly oxidized, that is, if the edible oil in use is found to meet the following conditions (1) or (2), replace all of them with new edible oil It is desirable to do.
(1) Acid value (AV value) exceeds 2.5.
(2) A carbonyl value (COV) exceeding 50.

  The oxidation of fats and oils is affected by oxygen, temperature, moisture (humidity), food pH, metal ions, light, and the like. That is, edible oil oxidizes with the passage of time according to its use state and use frequency. That is, the acid value increases. Therefore, the above-mentioned hygiene reasons are taken into account in restaurants and food processors that use a relatively large-capacity fryer (oil tank used for deep-fried food processing) to process a large amount of food at once. Thus, it was necessary to change the cooking oil frequently.

  Oxidized and deteriorated edible oil is paid for and is collected (waste oil treatment) by a specialist. In addition, edible oil that has been inexpensive has soared due to various effects such as energy problems. As described above, when the edible oil is frequently exchanged, there is a problem that economic burdens such as waste oil treatment cost and edible oil purchase cost are increased.

As an improvement measure, Patent Document 1 discloses a method in which a metal plate of a minus high potential generator is immersed and installed in the fryer edible oil, and the minus high potential is energized to suppress oxidation of the fryer edible oil. Proposed.
Utility model registration No. 3105391

  However, the electrode of the high-voltage AC electrostatic potential generator described in Patent Document 1 is in an electrically shorted state in contact with the inner surface of the oil tank, the heater, or a net for preventing the food from falling, and the like. There was a problem that the excellent effect of preventing the oxidation of oil could not be exhibited.

  Accordingly, the present invention provides a high potential generating plate and an edible oil antioxidant for an edible oil antioxidant that prevents contact with the inner surface of an oil tank, a heater, or a net and maintains an excellent effect of preventing the oxidation of edible oil. The purpose is to provide.

In order to achieve the above-described problem, the present invention is an electrode plate that is immersed in edible oil and supplied with a negative high potential of direct current via a cable from a high potential generating means,
Insulating means provided so as to cover the entire circumference of the edge of the electrode plate so that there is one joint,
A fixing means for fixing the joint and attaching the electrode plate and the insulating means;
The electrode plate was inserted into the groove of the insulating means is a high-potential generating plate edible oil antioxidant system in the portion corresponding to the corner of the electrode plates Ru bent insulating means.

  In the high potential generating plate of the edible oil oxidation preventing apparatus described above, the electrode plate is preferably made of stainless steel.

  In the high potential generating plate of the edible oil oxidation preventing apparatus described above, the insulating means is preferably made of a fluororesin.

  In the high potential generating plate of the edible oil oxidation preventing apparatus described above, the cable is preferably made of a stainless steel wire and a fluororesin that insulates and protects the wire.

In order to achieve the above-described problems, the present invention provides a switching power supply unit that is supplied with commercial power and generates a DC voltage,
High potential generating means for generating a negative high potential of DC from the generated DC voltage;
A high potential generating plate that is immersed in cooking oil and supplied with a negative high potential of direct current,
The high potential generation plate
An electrode plate to which a negative high potential of DC is supplied from a high potential generating means via a cable;
Insulating means provided so as to cover the entire circumference of the edge of the electrode plate so that there is one joint,
It consists of mounting means to fix the joint and attach the electrode plate and insulating means,
The electrode plate was inserted into the groove of the insulating means, an edible oil antioxidant system Ru bent insulating means in a portion corresponding to the corner of the electrode plate.

  According to this invention, the frame is insulated with a frame-like insulating frame that covers the entire periphery of the edge of the high potential generating plate immersed in the oil tank, thereby preventing contact with the inner surface of the oil tank, the heater, or the net. can do. Therefore, it is possible to exert an excellent effect of preventing edible oil from being oxidized.

Further, according to the present invention , the high potential generating plate can be insulated and protected by fixing only one corner of the insulating frame covering the entire circumference of the high potential generating plate. Repair and replacement, and repair and replacement of a frame-shaped insulating frame that covers the entire periphery of the edge of the high potential generating plate can be facilitated.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the edible oil oxidation prevention apparatus demonstrated below is an example of a structure of the edible oil oxidation prevention apparatus concerning this invention, and is not limited to the following structure.

[Configuration of edible oil oxidation prevention device]
FIG. 1 is a block diagram showing an example of the configuration of the edible oil oxidation preventing apparatus of the present invention. The edible oil oxidation preventing apparatus according to this embodiment includes a minus high potential generation unit 2, a relay unit 3, and a high potential generation plate 4. The high potential generating plate 4 is dipped in edible oil 7 filled in the oil tank 6 of the fryer 5.

  The plug 1 is led out from the minus high potential generator 2 and connected to an outlet to which commercial power is supplied. The minus high potential generation unit 2 outputs a minus high potential less than −10000 V of direct current. As an example, a negative high potential of −3000 V of direct current is output from the negative high potential generator 2. Note that the current that flows when a negative high potential of −3000 V is output is 2 mA or less, as will be described later.

  The output negative high potential is supplied from the negative high potential generation unit 2 to the relay unit 3 via the withstand voltage cable 11. Further, in order to make the ground potential of the minus high potential generator 2 and the flyer 5 the same, the minus high potential generator 2 and the flyer 5 are connected by a ground wire 12.

  In the relay unit 3, the negative high potential supplied from the negative high potential generation unit 2 is supplied to the high potential generation plate 4 through a relay cable 13 covered with a fluororesin excellent in withstand voltage, heat resistance, and oil resistance. The relay unit 3 can add an arbitrary number of relay units 3 via the relay unit 3. That is, the minus high potential generated by the minus high potential generation unit 2 can be supplied to the plurality of relay units 3. As will be described later, the relay cable 13 is made of the most excellent material in terms of withstand voltage, heat resistance, corrosion resistance, harmless food hygiene and the like, and is connected to the high potential generating plate 4.

  The fryer 5 is provided with an oil tank 6 that is filled with edible oil 7 for performing frying processing of a large amount of food at a time. The oil tank 6 is provided with a plurality of heaters 8 for heating the edible oil 7 and maintaining the temperature of the edible oil 7 constant. The heater 8 heats the edible oil 7 to an optimum temperature for frying the food by various methods such as electric and gas. For example, the cooking oil 7 is heated to 170 to 180 degrees. For the fryer 5 and the heater 8, the most excellent stainless steel is used in terms of withstand voltage, heat resistance, corrosion resistance, harmless food hygiene, and the like.

  A net 9 such as a wire mesh is prepared on the top of the plurality of heaters 8 in order to prevent the food from falling and to remove the residue generated during the frying process of the food. Like the fryer 5 and the heater 8, the net 9 is also made of stainless steel. The oil level 10 of the edible oil 7 filled in the oil tank 6 is filled with the edible oil 7 until it reaches a position higher than the heater 8 and the net 9. The high potential generating plate 4 is immersed in the edible oil 7 of the oil tank 6.

[Configuration of high potential generation plate]
FIG. 2 is a schematic view showing an example of the high potential generating plate 4 of the present invention. 2B is a front view of the high potential generating plate 4, FIG. 2A is a cross-sectional view taken along the line AA in FIG. 2B, and FIG. 2C is a cross-sectional view taken along the line BB in FIG. 2B. It is. FIG. 3 is a perspective view showing an example of the high potential generating plate 4 of the present invention.

  The high potential generating plate 4 of this embodiment includes a metal plate (electrode plate) 21, an insulating frame (insulating means) 22, and a rivet (attaching means) 23. One end of a relay cable (cable) 13 is connected to the high potential generation plate 4. An insulating cap 24 and a banana plug 25 are connected to the other end of the relay cable 13.

  The metal plate 21 is made of stainless steel, for example, SUS304. In FIG. 2B, the metal plate 21 has a shape in which one corner of the four corners is obliquely cut out, as indicated by a broken line.

  The frame-like insulating frame 22 is made of a fluororesin that is most excellent in terms of withstand voltage, heat resistance, corrosion resistance, harmless food hygiene, etc., such as PTFE (polytetrafluoroethylene). The insulating frame 22 has a groove into which the metal plate 21 can be inserted. A portion of the insulating frame 22 corresponding to one corner of the four corners of the metal plate 21 is subjected to counterboring. The portions of the insulating frame 22 corresponding to the other three corners of the four corners of the metal plate 21 are substantially perpendicular when the metal plate 21 is inserted into the groove and the insulating frame 22 is bent. Incisions are made as follows.

  The insulating frame 22 has a metal plate 21 inserted into the groove, the insulating frame 22 is bent at a portion corresponding to a corner of the metal plate 21, and a portion subjected to counterboring is fitted. A rivet 23 made of stainless steel, for example, SUS304, is passed through the fitted portion, and the insulating frame 22 is attached. In order not to contact the rivet 23, the corner of the metal plate 21 corresponding to the portion (corner) where the counterboring process is performed is formed in a diagonally cut shape. Thus, the frame-shaped insulating frame 22 covers and covers the entire periphery of the edge of the metal plate 21 for insulation protection.

  Since the temperature of the edible oil 7 is 170 to 180 degrees, when the insulating frame 22 is bonded with an adhesive, the adhesive is melted and various harmful substances may be dissolved in the edible oil 7. However, since this is mechanically fixed by the rivet 23, this does not happen. Since the metal plate 21 is inserted into the groove of the insulating frame 22 and fixed with the rivets 23, the metal plate 21 is not peeled off as compared with the case where the coating is applied and the insulation is protected. If the rivet 23 is removed, the metal plate 21 and the insulating frame 22 can be easily repaired and replaced. Since the frame-shaped insulating frame 22 that covers the entire periphery of the edge of the metal plate 21 is fixed so as to be insulated and protected, contact between the metal plate 21 and the inside of the oil tank 6 can be prevented.

  Ceramics, like PTFE, are excellent in terms of withstand voltage, heat resistance, corrosion resistance, harmless food hygiene, etc., but they are hard and difficult to cut, and when dropped, they are easily broken and difficult to process. For this reason, PTFE is used in this embodiment, which has an appropriate hardness, is hard to crack even if dropped, and is easy to process.

  The relay cable 13 is composed of a wire and a coating material. The wire of the relay cable 13 is made of SUS304 having a diameter of 1.5 mm, for example. The covering material of the relay cable 13 is made of, for example, PTFE having an outer diameter of 4 mm and an inner diameter of 2 mm so as to insulate and protect the wire.

  One end of the wire of the relay cable 13 is connected to the metal plate 21 by spot welding, and the connected portion is insulated and protected by the insulating frame 22. Further, the other end of the wire of the relay cable 13 is connected to the banana plug 25 by being crimped, and the connected portion is insulated and protected by the insulating cap 24. The banana plug 25 is made of, for example, copper-nickel plating. The insulating cap 24 is made of, for example, PTFE having an outer diameter of 8 mm and an inner diameter of 6 mm so as to cover a portion where the relay cable 13 and the banana plug 25 are connected.

[Operation of edible oil oxidation prevention device]
As shown in FIG. 1, the high potential generating plate 4 is immersed in the cooking oil 7 of the oil tank 6. Negative ions are generated in the cooking oil 7 by the negative high potential of the direct current generated from the high potential generating plate 4. In this state, when the food is deep-fried with the edible oil 7 having an acid value of 3.5, the acid value near the food becomes 1.0 and the carbonyl value becomes 6.7.

This is because water vaporizes at 100 degrees Celsius, so if you put ingredients in edible oil 7 at 170 degrees to 180 degrees, the water (H ₂ O) contained in the ingredients becomes hydrogen ions (H ⁺ ). And hydroxide ions (OH ⁻ ). One of the separated hydrogen ions (plus ions) is combined with negative ions generated from the high potential generating plate 4 immersed in the cooking oil 7 and adsorbed on the high potential generating plate 4. The other separated hydroxide ion remains in the vicinity of the food. The hydroxide ions (minus ions) remaining in the vicinity of the food material act on the oxidized cooking oil 7 to neutralize the vicinity of the food material. For this reason, the acid value near the foodstuff is 1.0.

  In this way, even when the food is fried using the cooking oil 7 having an acid value of 3.5, the acid value in the vicinity of the food can be set to 1.0. This allows edible oils that normally had to be treated as waste oil in one day to be used for 4-6 days.

[Configuration of negative high potential generator]
An example of the configuration of the minus high potential generator 2 is shown in FIG. The commercial power supply 31 is connected to the lamp 33 via a fuse 32 for protecting an electric circuit. As an example of the fuse 32, a glass tube fuse having a rated breaking current of 2A is used.

  The lamp 33 is a lamp for input power, and is turned on when commercial power is supplied, and is turned off when commercial power is not supplied. The lamp 33 may be any lamp as long as it can be used with a commercial power supply. For example, a Ne lamp or an LED (Light Emitting Diode) is used. Both ends of the lamp 33 are connected to each of the two input ends of the power switch 34.

  Two output ends of the power switch 34 are connected to both ends of the lamp 35. Both ends of the lamp 35 are connected to two input ends of a switching power supply circuit (switching power supply means) 36, respectively. The lamp 35 is a negative high-potential output lamp, and is lit when the power switch 34 is on and a negative high potential is output, and when the power switch 34 is off and no negative high potential is output. Turns off. The lamp 35 may be any lamp as long as it can be used with a commercial power source. For example, a Ne lamp or an LED is used.

  In the switching power supply circuit 36, a + 24V DC voltage and a ground potential are output from the supplied commercial power supply. The output DC voltage + 24V and the ground potential are supplied to the LED drive circuit 37.

  A lamp 38 is connected to the LED drive circuit 37. This lamp 38 is a lamp for detecting a short circuit, and lights or blinks when the high potential generating plate 4 and the oil tank 6 are short-circuited (shorted), so that the high potential generating plate 4 and the oil tank 6 are insulated. Turns off when in As the lamp 38, for example, a Ne lamp or an LED is used.

  A ground terminal 41 is derived from the LED drive circuit 37. The ground terminal 41 is frame-connected. The ground terminal 41 is connected to the flyer 5 through the ground wire 12 so that the ground potential of the minus high potential generator 2 and the flyer 5 is the same. Between the LED drive circuit 37 and the high potential generation circuit 39, a wiring of + 24V of a DC voltage, a wiring of a ground potential, and a wiring for short detection are provided.

  In the high potential generation circuit (high potential generation means) 39, the supplied DC voltage + 24V is converted into, for example, a DC voltage −3000V. As an example, the high potential generation circuit 39 is configured by a DC / DC converter. The converted DC voltage of −3000 V is output from the high potential output terminal 40 derived from the high potential generation circuit 39. A DC voltage of −3000 V output from the high potential output terminal 40 is supplied to the high potential generation plate 4 via the withstand voltage cable 11, the relay unit 3, and the relay cable 13.

[Output characteristics of negative high potential generator]
An example of the output characteristic of the minus high potential generator 2 is shown in FIG. Point a in FIG. 5 is when there is no load, and the output DC voltage is −3200V. The point b in FIG. 5 has an output current of 0.5 mA and an output DC voltage of about −2600V. The point c in FIG. 5 has an output current of 1.0 mA and an output DC voltage of about −2200V. The point d in FIG. 5 has an output current of 1.7 mA and an output DC voltage of −1700V.

  In this embodiment, since the high potential generating plate 4 is immersed in the edible oil 7 filled in the oil tank 6, the load on the minus high potential generating unit 2 is the edible oil 7. And according to the change of the electrical conductivity (conductivity) of the edible oil 7, as shown in FIG. 5, the load current and output DC voltage of the minus high potential generation part 2 change. The electrical conductivity of the edible oil 7 varies depending on the acid value of the edible oil 7, the residue generated during frying of the food, and the degree of moisture content.

  In this embodiment, the point d in FIG. 5 is a drooping point of the output DC voltage. That is, the overcurrent prevention circuit operates at the point d in FIG.

[Modification]
In this embodiment, as an example, the high potential generating plate 4 has a planar shape. However, the high potential generating plate 4 used for the fryer 5 having the cylindrical oil tank 6 may have a shape that can be immersed and installed along the cylindrical inner surface. Further, the high potential generating plate 4 used for the fryer 5 having the oil tank 6 whose bottom surface is hemispherical may be shaped so as to be immersed along the inner surface of the hemispherical surface.

  In this embodiment, PTFE (polytetrafluoroethylene) is used as an example of the fluororesin constituting the insulating frame 22. However, not only this PTFE but substantially the same effect can be obtained even if other fluororesins are used.

In this embodiment, a rivet 23 made of stainless steel is used to attach an insulating frame 22 that insulates and protects the high potential generating plate 4. However, substantially the same effect can be obtained even if screws made of stainless steel are used to attach the insulating frame 22.

  In this embodiment, the high potential generating plate 4 is immersed in the bottom of the oil tank 6. However, the high potential generating plate 4 may be suspended from the wall surface of the oil tank 6 and immersed.

It is a block diagram which shows an example of a structure of the edible oil antioxidant apparatus of this invention. It is the schematic which shows an example of the high electric potential generating plate of this invention. It is a perspective view which shows an example of the high electric potential generating plate of this invention. It is a block diagram which shows an example of the minus high electric potential generating part of this invention. It is a characteristic view which shows an example of the characteristic of the minus high electric potential of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Plug 2 ... Negative high electric potential generating part 3 ... Relay part 4 ... High electric potential generating plate 5 ... Flyer 6 ... Oil tank 7 ... Edible oil 8 ... Heater 9 ... Net 10 ... Oil level 11 ... Withstand voltage cable 12 ... Ground wire 13 ... Relay cable 21 ... Metal plate 22 ... Insulating frame 23 ... Rivet 24 ... Insulation cap 25 ... Banana plug 31 ... Commercial power supply 32 ... Fuse 33 ... Lamp 34 ... Power switch 35 ... Lamp 36 ... Switching power supply circuit 37 ... LED drive circuit 38 ... Lamp 39 ... High potential generation circuit 40 ... High potential output terminal 41 ... Ground terminal

Claims (5)

An electrode plate that is immersed in edible oil and supplied with a negative high potential of direct current via a cable from a high potential generating means;
Insulating means provided so as to cover the entire circumference of the edge of the electrode plate so that there is one joint,
A fixing means for fixing the joint and attaching the electrode plate and the insulating means;
The grooves of the insulating means to insert the electrode plate, the high-potential generating plate portion in the insulating Ru folding means edible oil antioxidant device corresponding to the corner of the electrode plate.   The high potential generating plate of an edible oil oxidation preventing apparatus according to claim 1, wherein the electrode plate is made of stainless steel.   The high-potential generating plate of an edible oil antioxidant apparatus according to claim 1, wherein the insulating means is made of a fluororesin.   The high-potential generating plate for an edible oil antioxidant device according to claim 1, wherein the cable is made of a stainless steel conductor and a fluororesin that insulates and protects the conductor. Switching power supply means for supplying a commercial power supply and generating a DC voltage;
High potential generating means for generating a negative high potential of DC from the generated DC voltage;
A high potential generating plate that is immersed in edible oil and supplied with the negative high potential of the DC,
The high potential generating plate is
An electrode plate to which a negative negative high potential is supplied via a cable from the high potential generating means;
Insulating means provided so as to cover the entire circumference of the edge of the electrode plate so that there is one joint,
It comprises an attachment means for fixing the joint and attaching the electrode plate and the insulating means,
The grooves of the insulating means to insert the electrode plates, part of the insulating means edible oil antioxidant system Ru bent corresponding to the corner of the electrode plate.

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