JP3165507U - Large automatic fryer with two oil tanks and cooking oil oxidation suppression device for large automatic fryer (2 tank fryer) - Google Patents

Abstract

An object of the present invention is to provide a large-sized automatic fryer that improves the effect of suppressing the oxidation of edible oil and improves the working efficiency by shortening the frying time. A large fryer having two oil tanks provided with a negative direct current potential electrode plate for suppressing oxidation of cooking oil, wherein each oil tank is fried with cooking oil by at least one food conveyor. Conveying means for conveying, a negative DC potential generating means for generating a negative DC potential, an insulating cable for supplying a negative DC potential, and immersed in edible oil, and applying a negative DC potential supplied by the insulating cable to the cooking oil. A negative DC potential electrode plate, insulating means for insulating the large fryer from the negative DC potential electrode plate, and electrode plate attaching means including an insulating cable for attaching the negative DC potential electrode plate to the large fryer are provided. [Selection diagram] Fig. 1

Description

  The present invention relates to a large automatic fryer equipped with a negative DC potential electrode plate for suppressing oxidation of edible oil, and more particularly to a large automatic fryer equipped with two oil tanks and an edible oil oxidation suppressing device for a large automatic fryer.

  Conventionally, frying edible oil has been oxidatively deteriorated over time and its freshness has deteriorated. In recent years, the terminal of a high-potential generator has been used to prevent edible oil oxidation. Various methods for suppressing oxidation of oil by putting it in oil and applying a high potential have been proposed.

  For example, in patent document 1, while arrange | positioning an elongate electrode along the inner wall face of an oil tank, and applying the alternating current high voltage of a frequency higher than a commercial frequency (50Hz / 60Hz) to this electrode, the bottom face of food and an oil tank A fryer electric field forming device is disclosed that prevents the oil from deteriorating while at the same time obtaining a uniform fried state by causing sufficient heat convection on the back side of the food to avoid close contact with the food.

  Moreover, in patent document 2, it is an electric field formation apparatus which is arrange | positioned in the oil tank of a fryer in an insulation state with an oil tank, and forms an electric field in the oil tank. Forming an electric field comprising an electrode portion made of a conductive material, and a voltage application portion made of a conductive material covered with ceramic or enamel for supplying a weak current high voltage between the electrode portion and the oil tank An apparatus and flyer are disclosed.

JP 2006-102447 A JP 2001-95695 A

  The electrode of the fryer electric field forming device disclosed in Patent Document 1 is installed on the bottom surface of the fryer, and can be installed without any problem if it is a fixed fryer. However, it is not intended for a large-sized automatic fryer. In the case of an automatic fryer equipped with a conveyor, there is a problem that the electrode cannot be installed on the bottom surface because the installation space and the installation position of the electrode are limited.

  In addition, the electric field forming apparatus disclosed in Patent Document 2 is a unit in which each component is installed. In particular, the electrode member can be installed on various flyers by combining the units, but is mainly installed on the bottom of the fryer. In addition, there is a problem that an automatic fryer equipped with a conveyor cannot be installed in a space.

  As described above, the automatic fryer equipped with the conveyor has a problem that it is difficult to easily retrofit because the installation space and the installation position for installing the electrode for generating a high potential are limited.

  Moreover, the electrodes of conventional high potential generators are mainly intended for small fryer, and when applied to large fryer, there is a problem in the effect of suppressing oxidation of edible oil. This is because the relationship between the amount of oil in the large fryer and the size of the electrode for generating a high potential and the applied voltage has not been elucidated, and the oxidation suppressing effect has not been sufficient.

  And in the large-sized automatic fryer provided with the several oil tank, in order to fully exhibit the acid value suppression effect of edible oil, there existed a problem that the installation position of the optimal electrode had to be set.

  The present invention has been made in view of the above problems, and has a large automatic fryer equipped with two oil tanks with a conveyor having a negative DC potential electrode plate for suppressing oxidation of edible oil, and edible oil oxidation of the large automatic fryer. An object is to provide a suppression device.

  In order to solve the above problems, a large-sized automatic fryer according to the present invention is a large-sized fryer having two oil tanks provided with a negative DC potential electrode plate for suppressing oxidation of edible oil. Conveying means for immersing the food material in heated cooking oil by at least one food conveyor and transporting the food material; negative DC potential generating means for generating a negative DC potential; and an insulating cable for supplying the generated negative DC potential; A negative DC potential electrode plate that is immersed in edible oil and applies the negative DC potential supplied by the insulating cable to the edible oil, and an insulating means that insulates the large fryer and the negative DC potential electrode plate; Electrode plate including the insulated cable for attaching a negative DC potential electrode plate to the large fryer Characterized in that it has a biasing means.

  An edible oil oxidation suppression device for a large fryer according to the present invention comprises the negative DC potential generating means, the insulated cable, the negative DC potential electrode plate, the insulating means, and the electrode plate mounting means. It is characterized by.

  According to the present invention, it is possible to provide a large automatic fryer equipped with two oil tanks with a conveyor provided with a negative DC potential electrode plate for suppressing oxidation of edible oil, and an edible oil oxidation suppression device for a large automatic fryer. Become.

It is a figure which shows the large sized automatic fryer provided with two oil tanks concerning the 1st Embodiment of this invention. It is a side view of a large sized automatic fryer provided with two oil tanks concerning a 1st embodiment of the present invention. It is a figure explaining the minus direct-current potential electrode plate and electrode attachment member integrated insulated cable of the 1st oil tank concerning a 1st embodiment of the present invention. It is a figure explaining the minus direct-current potential electrode plate and electrode attachment member integrated insulated cable of the 2nd oil tank concerning a 1st embodiment of the present invention. It is a figure explaining the minus direct-current potential electrode plate and electrode attachment member integrated insulated cable of the 2nd oil tank concerning other embodiments of the present invention. It is a figure explaining the structure of the other negative DC potential electrode plate of this invention. It is a figure explaining the structure of the other negative DC potential electrode plate of this invention. It is a figure explaining the structure of the negative DC potential generation circuit of this invention.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

(First embodiment)
<Configuration of large automatic fryer with two oil tanks>
The structure of the large-sized automatic fryer 1 provided with two oil tanks is demonstrated with reference to FIGS. FIG. 1 is a view showing a large-sized automatic fryer 1 having two oil tanks according to the first embodiment of the present invention. FIG. 1A is a side view of a large automatic fryer 1 having two oil tanks, and FIG. 1B is a cross-sectional view taken along line AA of the first oil tank of the large automatic fryer 1, FIG. These are BB sectional drawing of the 2nd oil tank of a large sized automatic fryer. FIG. 2 is a side view of the outside of the large-sized automatic fryer 1 including two oil tanks according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating a negative DC potential electrode plate and an electrode attachment member-integrated insulated cable of the first oil tank according to the first embodiment of the present invention. FIG. 3A is a view of the negative DC potential electrode plate and the electrode mounting member integrated insulated cable as viewed from the back side (oil-enhanced inner wall surface side), and FIG. 3B is a negative DC potential electrode plate and the electrode mounting member. It is the figure which looked at the integral type insulated cable from the lower side, and FIG.3 (c) is BB sectional drawing. FIG. 4 is a view for explaining the insulated cable integrated with the negative DC potential electrode plate and the electrode attachment member of the second oil tank according to the first embodiment of the present invention. FIG. 4A is a view of the negative DC potential electrode plate viewed from the upper side (oil increase upper side), and FIG. 4B is the lateral side of the negative DC potential electrode plate from the oil tank inner wall surface side direction (arrow X direction). FIG. 4C is a cross-sectional view taken along the line B-B of the negative DC potential electrode plate as viewed from the direction of the arrow Y. FIG. 5 is a view for explaining an insulated cable integrated with a negative DC potential electrode plate and an electrode attachment member of a second oil tank according to another embodiment of the present invention. FIG. 5A is a diagram in which a negative DC potential electrode plate according to another embodiment is installed at a cross-sectional position taken along the line BB in FIG. 1A, and FIG. FIG. 5C is a diagram of the negative DC potential electrode plate viewed from the direction of arrow B.

  The first oil tank 2 of the large-sized automatic fryer 1 having two oil tanks includes a food conveying conveyor 3, a food pressing conveyor 4, a heater 5, a negative DC potential generating circuit 6, an electrode mounting member integrated insulation cable 7, and a negative DC potential. An electrode plate 8, an insulator 9, and a charging port 11 are provided.

  The oil tank 2 contains cooking oil for frying the food 12 and is a large oil tank having a capacity of 60 liters or more. Although not shown, the bottom is provided with a discharge port for discharging used cooking oil when the cooking oil is replaced. As shown in FIG. 2, the negative DC potential generating circuit 6 is disposed on the side surface of the large automatic fryer 1 outside the first oil tank 2.

  The food material conveyer 3 conveys the food material 12 while being immersed in heated cooking oil and fried. The food conveying conveyor 3 is formed of an endless mesh conveyor or the like and is wound around the rotating rollers 3A and 3B. Moreover, the food conveying conveyor 3 can be easily lifted from the oil tank 2 when, for example, the first oil tank 2 of the large-sized automatic fryer 1 is cleaned by a mounting arm (not shown).

  The food holding conveyor 4 is for holding the food 12 so that it does not rise when the food conveying conveyor 3 is conveying the food 12 while fried in cooking oil. The food pressing conveyor 4 is formed of an endless mesh conveyor or the like and is wound around the rotating rollers 4A and 4B. The food conveying conveyor 3 and the food pressing conveyor 4 are driven in synchronization. Moreover, the food conveying conveyor 3 can be easily lifted from the oil tank 2 when, for example, the first oil tank 2 of the large-sized automatic fryer 1 is cleaned by a mounting arm (not shown). The mounting arm is configured to lift the food conveying conveyor 3 and the food pressing conveyor 4 together as a unit.

  The heater 5 is for heating the edible oil in the first oil tank 2, and a known heating method such as an electric heater type or a gas stove type can be applied. The heater 5 heats edible oil to a temperature that is optimal for frying the food, for example, 170 degrees to 180 degrees. The edible oil in the oil tank 2 is controlled by a control circuit (not shown) so as to have a predetermined temperature.

  The negative DC potential generation circuit 6 generates a negative DC potential to be applied to cooking oil from a 100V AC power supply. The negative DC potential generation circuit 6 of this embodiment can generate −1 KV to −80 KV, and the current value is, for example, −120 KV and 248 μA. The negative DC potential generating circuit 6 is provided with a voltage variable control switch for adjusting output so that an optimum potential can be set. It is desirable to set the voltage of the negative DC potential generator 6 appropriately in the range of −1 KV to −80 KV. In this embodiment, the negative DC potential applied to the edible oil is -4000 to -12000V. In the present embodiment, the negative DC potential generating circuit 6 is disposed on the side surface outside the first oil tank 2 of the large-sized automatic fryer 1. However, the negative DC potential generator 6A may be a single device. .

  A known method can be applied to the negative DC potential generating circuit 6. For example, there is a Cockcroft-Walton circuit as shown in FIG. Cockcroft-Walton circuit is a kind of rectifier circuit used to obtain high-voltage power supply. Cockcroft-Walton circuit is a DC or AC power supply by combining capacitors and diodes in multiple stages. The higher the transformer terminal voltage, the higher the voltage can be obtained, but in order to obtain a high voltage, the breakdown voltage inside the transformer must be secured. Therefore, it is necessary to prepare a rectifier diode having a high withstand voltage.

  The electrode attachment member-integrated insulated cable 7 is for supplying the high potential generated by the minus DC potential generating circuit 6 to the minus DC potential electrode plate 8. The insulated cable 7 is covered with an insulating layer made of a heat and oil resistant material such as Teflon (registered trademark). Further, the negative DC potential electrode plate 8 can be arranged so as to maintain an insulating state at a predetermined position in the gap between the side wall surface of the first oil tank 2 and the food material conveying conveyor 3 and the food material pressing conveyor 4. As shown in FIG. 3, the electrode mounting member has a shape like a hook that is hooked on the side wall of the first oil tank 2, and a groove into which the insulating cable 7 can be fitted is formed at the center. The electrode mounting member is, for example, coated with an insulating layer made of a heat resistant and oil resistant material such as Teflon on a stainless material. Moreover, you may form with a well-known insulating material etc.

  The negative DC potential electrode plate 8 applies a negative DC potential to the edible oil in the first oil tank 2 in order to suppress oxidation of the edible oil, and is a metal plate made of a conductive material, such as a stainless steel plate. Is preferred. The negative DC potential electrode plate 8 is provided with an insulator 9 at a predetermined position in order to maintain an insulating state between the inner wall surface of the first oil tank 2, the food conveying conveyor 3, and the food pressing conveyor 4. A known conductive material having oil resistance is also applicable. The negative DC potential electrode plate 8 is arranged so as to keep an insulation state between the side wall surface of the first oil tank 2 and the food material conveying conveyor 3 and the food material pressing conveyor 4 by the electrode plate mounting member integrated with the insulating cable 7. To be fixed. In the present embodiment, since the electrode attachment member-integrated insulated cable 7 is used, for example, when the first oil tank 2 of the large-sized automatic fryer 1 is cleaned, the negative DC potential electrode plate 8 and the insulated cable 7 are easily removed. It is possible. Further, the optimum effect can be obtained by setting the area of the negative DC potential electrode plate 8 corresponding to the amount of edible oil in the first oil tank 2 of the large automatic fryer 1.

  The insulator 9 is for maintaining the insulation state between the inner wall surface of the first oil tank 2, the food conveying conveyor 3, the food pressing conveyor 4, and the negative DC potential electrode plate 8. As shown in FIG. 3, the negative DC potential electrode plate 8 has ceramic or Teflon insulators 9 attached to necessary portions of the corner and side edges of the electrode plate, and the inner wall surface of the first oil tank 2 and the food It is the structure for maintaining the insulation state of the conveyance conveyor 3 and the foodstuff pressing conveyor 4. FIG. The place where the insulator 9 is installed can be appropriately designed depending on the position where the negative DC potential electrode plate 8 is arranged. The insulator 9 is made of an insulating material having heat resistance and oil resistance. For example, a ceramic material or a Teflon material is preferable. Any known insulating material having heat resistance and oil resistance is applicable.

  The charging port 11 is an inlet for charging the first oil tank 2 with the food material 12 fried with cooking oil.

  The second oil tank 20 of the large-sized automatic fryer 1 having two oil tanks is composed of a food conveying paddle conveyor 21, a heater 5, a negative DC potential generating circuit 6, an insulating cable 7, a negative DC potential electrode plate 25, an insulator 26, and food materials. A conveyor 24 and a slot 28 are provided.

  The 2nd oil tank 20 puts the cooking oil for frying the foodstuff 12, and a capacity | capacitance is a large sized oil tank of 60 liters or more. Although not shown, the bottom is provided with a discharge port for discharging used cooking oil when the cooking oil is replaced. As shown in FIG. 2, the negative DC potential generating circuit 6 is disposed on the side surface of the large automatic fryer 1 outside the second oil tank 20.

  The food material transport paddle conveyor 21 conveys the food material 12 upside down to the next food material transport paddle conveyor 21 on the downstream side while the food material 12 is immersed in heated cooking oil and fried. Thereby, as for the foodstuff 12, the surface and the back surface are fried equally. The food conveying paddle conveyor 21 is formed like a water wheel, and the paddle 23 rotates around the rotation shaft 22. And the foodstuff 12 fried in cooking oil is scooped up, and the foodstuff 12 is delivered to the paddle conveyor 21 of a downstream side. Moreover, the food conveyance paddle conveyor 21 can be easily lifted from the 2nd oil tank 20 when cleaning the 2nd oil tank 20 of the large sized automatic fryer 1 with the attachment arm which is not shown in figure, for example.

  The heater 5 is for heating the edible oil in the second oil tank 20, and a known heating method such as an electric heater type or a gas stove type can be applied. The heater 5 heats edible oil to a temperature that is optimal for frying the food, for example, 170 degrees to 180 degrees. The edible oil in the second oil tank 20 is controlled by a control circuit (not shown) so as to have a predetermined temperature.

  The negative DC potential generation circuit 6 generates a negative DC potential to be applied to cooking oil from a 100V AC power supply. The negative DC potential generation circuit 6 of this embodiment can generate −1 KV to −80 KV, and the current value is, for example, −120 KV and 248 μA. The negative DC potential generating circuit 6 is provided with a voltage variable control switch for adjusting output so that an optimum potential can be set. It is desirable to set the voltage of the negative DC potential generator 6 appropriately in the range of −1 KV to −80 KV. In this embodiment, the negative DC potential applied to the edible oil is -4000 to -12000V. In the present embodiment, the negative DC potential generating circuit 6 is disposed on the side surface outside the second oil tank 20 of the large-sized automatic fryer 1, but the negative DC potential generator 6A can be a single device. .

  A known method can be applied to the negative DC potential generating circuit 6. For example, there is a Cockcroft-Walton circuit as shown in FIG. The Cockcroft-Walton circuit is a type of rectifier used to obtain a high-voltage power supply. The Cockcroft-Walton circuit increases the DC or AC power supply by combining capacitors and diodes in multiple stages. It can be converted into a voltage AC power supply. The higher the terminal voltage of the transformer, the higher the voltage can be obtained, but in order to obtain a high voltage, the structure for securing the withstand voltage inside the transformer becomes complicated, and the rectifier diode also has a withstand voltage. It is necessary to prepare a highly specific one.

  The electrode attachment member-integrated insulated cable 7 is for supplying the high potential generated by the negative DC potential generating circuit 6 to the negative DC potential electrode plate 25. The electrode-attaching member-integrated insulated cable 7 is covered with an insulating layer made of a heat-resistant and oil-resistant material such as Teflon. Further, the negative DC potential electrode plate 25 can be arranged so as to maintain an insulating state at a predetermined position in the gap between the bottom surface of the second oil tank 20 and the food material transport paddle conveyor 21. As shown in FIG. 4 (c), the electrode mounting member has a shape like a hook that is hooked on the side wall of the second oil tank 20, and a groove into which the insulated cable 7 can be fitted is formed at the center. The electrode mounting member is, for example, coated with an insulating layer made of a heat resistant and oil resistant material such as Teflon on a stainless material. Moreover, you may form with a well-known insulating material etc. The shape of the attachment position of the electrode attachment member and the negative DC potential electrode plate 25 can be arbitrarily designed so that the negative DC potential electrode plate 25 is located at the center of the bottom surface of the second oil tank 20.

  The negative DC potential electrode plate 25 applies a negative DC potential to the edible oil in the second oil tank 20 in order to suppress oxidation of the edible oil, and is a metal plate made of a conductive material, such as a stainless steel plate. Is preferred. The negative DC potential electrode plate 25 is provided with an insulator 9 at a predetermined position in order to maintain an insulation state between the bottom surface of the second oil tank 20 and the food conveying paddle conveyor 21. A known conductive material having oil resistance is also applicable. The negative DC potential electrode plate 25 is disposed and fixed so as to maintain an insulating state in the gap between the bottom surface of the second oil tank 20 and the food conveying paddle conveyor 21 by the electrode plate mounting member integrated with the insulating cable 7. . In the present embodiment, since the electrode attachment member-integrated insulated cable 7 is used, for example, when the second oil tank 20 of the large-sized automatic fryer 1 is cleaned, the negative DC potential electrode plate 25 and the insulated cable 7 are easily removed. It is possible. Further, the optimum effect can be obtained by setting the area of the negative DC potential electrode plate 25 in accordance with the amount of edible oil in the second oil tank 20 of the large automatic fryer 1.

  The insulator 9 is for maintaining the insulation state between the bottom surface and the inner wall surface of the second oil tank 20, the food conveying paddle conveyor 21, and the negative DC potential electrode plate 25. As shown in FIG. 4, the negative DC potential electrode plate 25 has ceramic or Teflon insulators 9 attached to necessary portions of the corner and side edges of the electrode plate, and the bottom surface and inner wall surface of the second oil tank 20. And the food conveying paddle conveyor 21 are configured to maintain an insulating state. The place where the insulator 9 is installed can be appropriately designed depending on the position where the negative DC potential electrode plate 25 is arranged. The insulator 9 is made of an insulating material having heat resistance and oil resistance. For example, a ceramic material or a Teflon material is preferable. Any known insulating material having heat resistance and oil resistance is applicable.

  The input port 28 is an inlet for inputting the food material 12 fried in cooking oil into the second oil tank 20.

<Operation of large automatic fryer>
Next, with reference to FIG. 1, the operation | movement which fries the foodstuff of the large sized automatic fryer 1 is demonstrated.

  First, the food 12 for frying is put into the oil tank 2 from the inlet 11 of the first oil tank 2. Although not shown in FIG. 1, the foodstuff 12 is automatically supplied from the input port 11 by a conveyor such as the next process conveyor 27. It is also possible to manually input the foodstuff 12.

  The food conveying conveyor 3 conveys the food in the direction of arrow X1 while immersing the food 12 in the heated cooking oil on the upper surface of the conveyor and frying it. Ingredients 12 are delivered to the inlet 28. At this time, the lower surface of the food pressing conveyor 4 is arranged to be at a position slightly below the oil level (in edible oil). And while conveying the foodstuff 12 in edible oil with the foodstuff conveyance conveyor 3, it hold | suppresses so that the foodstuff 12 may not float up in edible oil. The food conveying conveyor 3 and the food pressing conveyor 4 are driven synchronously, and the conveying speed is controlled by a control circuit (not shown).

  Next, the foodstuff 12 delivered to the second oil tank 20 is immersed in the cooking oil heated by the food conveyance paddle conveyor 21 and fried, and the foodstuff 12 is transferred to the next food conveyance paddle conveyor 21 on the downstream side. Turn it over and carry it. Thereby, as for the foodstuff 12, the surface and the back surface are fried equally. The food conveying paddle conveyor 21 is formed like a water wheel, and the paddle 23 rotates around the rotation shaft 22. And the foodstuff 12 fried in cooking oil is scooped up, and the foodstuff 12 is delivered to the paddle conveyor 21 of a downstream side. The food 12 that is turned upside down while being fried on the last food conveyance paddle conveyor 21 is taken out of the cooking oil on the food conveyance conveyor 24 and delivered to the next-stage conveyance conveyor 27.

<Negative DC potential electrode plate>
As shown in FIG. 1, in the first oil tank 2 of the automatic fryer, a conveyor is provided at the bottom of the oil tank 2, so that an edible oil oxidation suppression electrode plate is disposed at the bottom of the oil tank so as to be installed on the fixed fryer. It is structurally difficult to form an electric field. In addition, since the second oil tank 20 is a paddle conveyor 21, an edible oil acid value suppression electrode plate can be disposed at the bottom of the oil tank 20.

  In the present embodiment, in the first oil tank 2, the negative DC potential electrode plate 8 is installed in a slight gap between the food conveying conveyor 3, the food pressing conveyor 4, and the inner wall surface of the oil tank 2 to solve the above problem. did. In order to dispose the negative DC potential electrode plate 8 in the gap, the insulating cable 7 and the electrode plate mounting member are integrated so that the mounting and removal can be simplified. In the second oil tank 20, in order to place the negative DC potential electrode plate 25 at a predetermined position in the gap between the bottom surface of the oil tank 20 and the food conveying paddle conveyor 21, the insulating cable 7 and the electrode plate mounting member are integrated. Easy to install and remove.

  As shown in FIGS. 3 and 4, the electrode mounting member is shaped like a hook that hooks the side walls of the oil tanks 2 and 20, and a groove into which the insulated cable 7 can be fitted is formed in the center. The electrode mounting member is, for example, coated with an insulating layer made of a heat resistant and oil resistant material such as Teflon on a stainless material. Moreover, you may form with a well-known insulating material etc. Further, an insulator 9 may be installed at the portions in contact with the side walls and the bottom surface of the oil tanks 2 and 20 so that the insulation state between the electrode mounting member and the large-sized automatic fryer 1 may be maintained. By doing in this way, it becomes possible to make the insulation construction work and ground construction work of a large-sized automatic fryer main body unnecessary.

  With reference to FIG. 5, another embodiment of the negative DC potential electrode plate 25 and the electrode attachment member-integrated insulated cable 7 installed in the second oil tank 20 will be described. As shown in FIG. 5 (a), the electrode attachment member-integrated insulated cable 7 is supported by the side walls on both sides of the oil tank 20, and the negative DC potential electrode plate 25 is attached by a fixing screw 31 and rotates. It is installed immediately below 21. A screw rotation type adjuster 32 is provided on the upper part of the side walls on both sides so that the gap with the food conveying paddle conveyor 21 can be adjusted. The screw rotation type adjuster 32 is an insulator and is made of an insulating material having heat resistance and oil resistance. For example, a ceramic material or a Teflon material is preferable. Any known insulating material having heat resistance and oil resistance is applicable. By installing the negative DC potential electrode plate 25 immediately below the rotating food conveying paddle conveyor 21, the effect of applying the negative DC potential is maximized because the paddle conveyor 21 is close to the position where the cooking oil is stirred. It can be demonstrated.

  As the negative DC potential electrode plates 8 and 25 of the present embodiment, conductive metal plates are used, and a stainless steel plate having a thickness of 0.5 to 5 mm is suitable. These insulators are attached to necessary places, and are immersed in edible oil so as not to directly contact the large-sized automatic fryer 1.

In addition, it is desirable that the areas of the negative DC potential electrode plates 8 and 25 of the present embodiment are appropriately set according to the amount of oil in the large automatic fryer 1. For example, when the oil volume of the large automatic fryer 1 is 120 liters or less, the area of the electrode plate 8 (surface area) per liter of unit oil volume is 2.0 to 4.0 cm ² / liter, and when the oil volume is 120 liters or more, 16. It is suitable to set it as 0-18.0 cm < ² > / liter.

  The formula for calculating the area is as follows. When the oil amount is 120 liters or less, when the oil amount of the fryer is Y, X (electrode plate area) ≧ 1/300 × Y (oil amount) + 2.6 ± 0.4 is set, and when the oil amount is 120 liters or more, , X (electrode plate area) ≧ 1/300 × Y (oil amount) + 16.4 ± 0.4, the area of the negative DC potential electrode plate 8 of this embodiment can be determined. If the electrode plates 8 and 25 are too small beyond this range, it is difficult to obtain a desired oxidation suppressing effect. If the electrode plates 8 and 25 are too large beyond this range, it is not preferable for handling and installation. The negative DC potential electrode plate 8 may be used as a single plate or may be divided into a plurality of plates. In addition, the said formula which calculates the electrode plate 8 area is a calculation formula obtained as a result of accumulating experiment by this applicant.

  As shown in FIG. 1 (b), the edible oil in the first oil tank 2 is heated to a predetermined temperature by the heater 5. In the case of this embodiment, since it heats at the bottom part of the large sized automatic fryer 1, edible oil convects in a fryer. As indicated by the arrows, the fryer rises from the center of the fryer and descends from the upper surface of the oil surface on the side wall surfaces on both sides to convect to the bottom. When the cooking oil descends on the side wall surfaces on both sides, it passes through the vicinity of the negative DC potential electrode plate 8. Therefore, by arranging the negative DC potential electrode plate 8 at a predetermined position in the gap between the side wall surface of the oil tank 2 and the food conveying conveyor 3 and the food pressing conveyor 4, the effect of applying the negative DC potential can be maximized. It is.

  In the present embodiment, the installation depth of the negative DC potential electrode plate 8 is set in the vicinity where the convection cooking oil starts to descend on the side wall surface. Specifically, it is preferable that the bottom of the food conveying conveyor 3 is slightly lower than half the height of the food 12. In other words, it is slightly lower (bottom side) than half of the distance between the upper food holding conveyor 4 and the lower food conveying conveyor 3, which is the position where the convection cooking oil begins to descend. In addition, as shown by the arrows in FIG. 1A, this position is the effect of further applying a negative DC potential because the cooking oil in the oil tank 2 is agitated by the movement of the food conveying conveyor 3 and the food 12. Can be improved.

  In the present embodiment, an example in which one negative DC potential electrode plate 8 is installed on one side wall surface of the oil tank 2 is shown. However, when the space for installation is limited by a conveyor, Two negative DC potential electrode plates 8 may be provided on the wall surfaces on both sides so as to satisfy the area condition. In this way, the installation space for the negative DC potential electrode plate 8 on one side can be halved. Therefore, the edible oil oxidation-suppressing electrode plate of this embodiment is extremely effective for a large-sized automatic fryer with a small installation space and a small gap.

  Next, as shown in FIG. 1C, the edible oil in the second oil tank 20 is heated to a predetermined temperature by the heater 5. In the case of this embodiment, since it heats in the bottom part of the large sized automatic fryer 1, edible oil will convect in a fryer. As indicated by the arrows, the fryer rises from the center of the fryer and descends from the upper surface of the oil surface on the side wall surfaces on both sides to convect to the bottom. This edible oil passes through the vicinity of the negative DC potential electrode plate 25 at a position where it rises due to heating. Therefore, the effect of applying the negative DC potential can be maximized by disposing the negative DC potential electrode plate 25 at a predetermined position in the gap between the bottom surface of the oil tank 20 and the food conveying paddle conveyor 21.

  In the present embodiment, the installation position of the negative DC potential electrode plate 25 means that the edible oil in the oil tank 20 is moved by the movement of the food conveying paddle conveyor 21 and the food 12, as indicated by the arrows in FIG. Since it is agitated, the effect of applying a negative DC potential can be further improved.

  In this embodiment, an example in which one negative DC potential electrode plate 25 is installed on the bottom surface of the oil tank 20 is shown. However, when the space for installation is limited by a conveyor, the same as the electrode plate 8 described above. Two or more negative DC potential electrode plates 25 may be installed so as to satisfy the area condition. In this way, the installation space for one negative DC potential electrode plate 25 can be reduced to half or less. Therefore, the edible oil oxidation-suppressing electrode plate of this embodiment is extremely effective for a large-sized automatic fryer with a small installation space and a small gap.

  As a method for examining the degree of oxidation of edible oil, the peroxide value (POV) and the acid value (AV) are often used. POV is a method for measuring the content of hydroperoxide produced at the beginning of oxidation of fats and oils by an iodometric titration method, and is widely used as an index for determining the degree of acidity in the initial stage. The unit is mg equivalent / kg. Oxidation progresses as this value increases. AV indicates the deterioration of fats and oils, and the degree of thermal deterioration of the frying oil is known. Deterioration progresses as the value increases. As a general guideline for edible oil replacement, POV is about 30 to 50 and AV is about 2.0 to 3.0 (about 2.5). The oxidation suppression effect of the edible oil oxidation suppression electrode plate (negative DC potential electrode plate 8) of the present embodiment is that the acid value (AV) is 1.0 or less when used for about one week in a large automatic fryer, and one month. Even if it was used for a long time, it could be suppressed to 2.5 or less.

  By applying a negative DC potential to the edible oil with the negative DC potential electrode plates 8 and 25, shortening the frying time, reducing the temperature of the edible oil, preventing contamination of the edible oil, suppressing the oxidation of the edible oil, reducing the amount of waste oil, etc. There is an effect. This is because clusters, which are molecular aggregates of water and oil, are fragmented by applying an electric field, heat conduction is improved, and the evaporation rate of moisture is increased. In addition, by applying a negative DC potential, impurities (such as water containing free fatty acids and emulsifying substances) become charged, increasing mass, promoting separation and settling from insulating oil, and the amount of water dissolved in the oil. Is extremely suppressed, and deterioration of the oil is prevented.

  Further, in this embodiment, by applying a minus high potential to the edible oil, the oil molecules are subdivided, and the oil has improved thermal conductivity, and the temperature is about 5 ° C. to 10 ° C. lower than the normal oil temperature. The food will be in the normal fried state. Therefore, since the food can be fried at a low oil temperature, the thermal deterioration of the oil is suppressed, so that the effect of suppressing the oxidation of the edible oil is improved. In addition, the working efficiency is improved because the frying time is shortened.

  As described above, since the conveyor is provided at the bottom of the oil tank in the first oil tank 2 of the large automatic fryer, the electric field is generated by arranging the edible oil oxidation suppression electrode plate at the bottom of the oil tank so as to be installed on the fixed fryer. Although it was difficult to form, it was possible to form an optimum electric field in the oil layer of the large automatic fryer according to this embodiment. In the second oil tank 20, in order to place the negative DC potential electrode plate 25 at a predetermined position in the gap between the bottom surface of the oil tank 20 and the food conveying paddle conveyor 21, the insulating cable 7 and the electrode plate mounting member are integrated. The mounting and removal can be easily performed, and the present embodiment makes it possible to form an optimum electric field in the oil layer of the large automatic fryer 1 with the paddle conveyor 21.

<Configuration of other negative DC potential electrode plates>
6-7 is a figure explaining the structure of the negative DC potential electrode plate which concerns on other embodiment.
FIG. 6 shows a case in which the negative DC potential electrode plate 8 can be self-supported in a vertical position, and ceramic or Teflon insulators 9 are attached to necessary portions of the corner and side edges of the electrode plate, and the insulating self-supporting is performed. It becomes independent by the legs 14.

  FIG. 7 shows a case where an insulator 9 is installed around the negative DC potential electrode plate 8. The negative DC potential electrode plate 8 includes an electrode plate 8, an insulating frame (insulator) 9, and a bolt 15. The frame-shaped insulating frame 9 is made of Teflon, which is most excellent in terms of withstand voltage, heat resistance, corrosion resistance, harmless food hygiene, and the like. As a fluororesin, it is comprised, for example from PTFE (polytetrafluoroethylene, Polytetrafluoroethylene). The insulating frame 9 has a groove into which the electrode plate 8 can be inserted. Thus, the frame-shaped insulating frame 9 covers the entire periphery of the edge portion of the negative DC potential electrode plate 8 to provide insulation protection.

<Edible oil oxidation suppression device>
In the configuration of the negative DC potential generating circuit 6, the electrode mounting member integrated insulating cable 7, the negative DC potential electrode plate 8, and the insulator 9 described in the configuration of the large-sized automatic fryer 1 of the first embodiment, By using the single negative DC potential generator 6 </ b> A as the potential generating circuit 6, an edible oil oxidation suppressing device for the large automatic fryer 1 can be obtained.

  In other words, the edible oil oxidation suppressing device according to the present invention is configured to include a negative DC potential generator 6A, an electrode mounting member-integrated insulated cable 7, a negative DC potential electrode plate 8, and an insulator 9.

  A detailed description of each part is the same as that described in the first embodiment, and a description thereof will be omitted. Note that the minus DC potential generation circuit 6 is replaced with a minus DC potential generator 6A.

  According to the edible oil oxidation suppression device of this embodiment, it can be used as it is in an existing large-sized automatic fryer, and the edible oil oxidation suppression electrode plate can be installed at an appropriate position, and the acid value deterioration of edible oil is suppressed under optimal conditions. can do.

  Further, in this embodiment, by applying a minus high potential to the edible oil, the oil molecules are subdivided, and the oil has improved thermal conductivity, and the temperature is about 5 ° C. to 10 ° C. lower than the normal oil temperature. The food will be in the normal fried state. Therefore, since the food can be fried at a low oil temperature, the thermal deterioration of the oil is suppressed, so that the effect of suppressing the oxidation of the edible oil can be improved. Moreover, since the frying time is shortened, work efficiency can be improved.

<Operational effects of this embodiment>
In the present embodiment, it is possible to provide a large automatic fryer with a conveyor provided with a negative DC potential electrode plate for suppressing oxidation of edible oil, and an edible oil oxidation suppressing device for a large automatic fryer. In order to install the negative DC potential electrode plate 8 in a slight gap between the food conveying conveyor 3, the food pressing conveyor 4, and the inner wall surface of the oil tank 2, the insulating cable 7 and the electrode plate mounting member are integrated. Easy installation and removal. Even if the installation space for the negative DC potential electrode plate 8 is limited by the conveyor, the negative DC potential electrode plate 8 can be installed.
Further, in the present embodiment, by setting the installation depth of the negative DC potential electrode plate 8 in the vicinity of the convection cooking oil starting to descend on the side wall surface, the effect of applying the negative DC potential can be maximized. Can do. And by setting it as the structure which installs the negative DC potential electrode plate 8 in two places on the side wall surfaces on both sides of the oil tank 2, it is possible to further improve the effect of suppressing edible oil oxidation and to halve the area of the electrode plate 8. It is.
Moreover, in this embodiment, since the edible oil oxidation suppression electrode plate is provided at a position where the convection edible oil begins to descend on the side wall surface, it is possible to form an optimum electric field in the large automatic fryer 1 oil layer.
Further, in this embodiment, by applying a minus high potential to the edible oil, the oil molecules are subdivided, and the oil has improved thermal conductivity, and the temperature is about 5 ° C. to 10 ° C. lower than the normal oil temperature. The food will be in the normal fried state. Therefore, since the food can be fried at a low oil temperature, the thermal deterioration of the oil is suppressed, so that the effect of suppressing the oxidation of the edible oil can be improved. Moreover, since the frying time is shortened, work efficiency can be improved.
In the present embodiment, when the oil volume of the large-sized automatic fryer 1 is 120 liters or less, the area of the electrode plate 8 (surface area) per liter of unit oil volume is 2.0 to 4.0 cm ² / liter, and the oil volume is 120. If it is 1 liter or more, the desired oxidation-inhibiting effect can be obtained by setting it to 16.0 to 18.0 cm ² / liter.

  In the above, this invention was demonstrated by suitable embodiment of this invention. Although the present invention has been described with specific examples, various modifications and changes may be made without departing from the broad spirit and scope of the present invention as defined in the claims for utility model registration. Is possible.

  The negative direct current potential electrode plate of the large-sized automatic fryer according to the present invention includes edible oil in the gap between the inner wall surface of the oil tank and the conveying means, and edible oil in the gap between the bottom surface of the oil tank and the conveying means. The electrode mounting means is installed while maintaining an insulation state between the large fryer and the conveying means.

  The large automatic fryer according to the present invention is immersed in the edible oil, and the area on one side of the negative DC potential electrode plate in contact with the edible oil is Y when the amount of oil is 120 liters or less. Sometimes, X (electrode plate area) ≧ 1/300 × Y (oil amount) + 2.6 ± 0.4 is set, and when the oil amount is 120 liters or more, X (electrode plate area) ≧ 1/300 × Y ( Oil amount) is set to + 16.4 ± 0.4.

  The oil volume of the large automatic fryer of the large automatic fryer according to the present invention is 120 liters or less.

The large automatic fryer according to the present invention is immersed in the edible oil, and the area on one surface side of the negative DC potential electrode plate that is in contact with the edible oil is 2.0 to 4.0 cm ² per liter of unit oil amount. / Liter.

  The oil volume of the large automatic fryer of the present invention is 120 liters or more.

In addition, the large automatic fryer according to the present invention is immersed in the edible oil, and the area on one surface side of the negative DC potential electrode plate in contact with the edible oil is 16.0 to 18.0 cm ² per liter of unit oil amount. / Liter.

  Further, the insulating means of the large-sized automatic fryer according to the present invention is characterized in that the distance between the inner wall surface and the bottom surface of the large-sized automatic fryer and the negative DC potential electrode plate is maintained at 3 to 10 mm.

  Further, the negative DC potential applied to the edible oil of the large automatic fryer according to the present invention is -4000 to -12000V.

In a large automatic fryer for business use (oil volume 200 liters, for frying), the usual food frying operation was performed as usual and the acid value of the oil was measured. When the negative DC potential electrode plate 8 having an area of 16.0 to 18.0 cm ² / liter was installed in this large-sized automatic fryer for commercial use, and the frying of the prepared vegetables under the same conditions was performed, the acid value after 5 days of operation (AV) was 0.92, the acid value was suppressed to a low value of 1.57 even after 10 days of operation, and the oxidation suppression effect was remarkably excellent.

In the large-sized automatic fryer 1 (oil amount 300 liters, for prepared dishes), the usual food frying operation was performed as usual and the acid value of the oil was measured. When the negative direct current potential electrode plate 8 having an area of 16.0 to 18.0 cm ² / liter was installed on the large automatic fryer 1 and the frying of the prepared vegetables under the same conditions was performed, the acid value was 2 after 30 days of operation. It was suppressed to a low value of 0.5, and the oxidation suppression effect was remarkably excellent.

1 Large Automatic Flyer 2 Oil Tank 3 Food Conveyor (Net Conveyor)
3A, 3B Rotating roller 4 Food holding conveyor (net conveyor)
4A, 4B Rotating roller 5 Heating heater 6 Negative DC potential generation circuit 6A Negative DC potential generator 7 Insulated cable 8 Negative DC potential electrode plate 9 Insulated terminal 10 Food material inlet 11 Edible oil level 12 Food material 13 Next process conveyor 14 Insulated self-supporting Leg 20 Second oil tank 21 Food transport paddle conveyor 22 Rotating shaft 23 Paddle 24 Food transport conveyor 25 Negative DC potential electrode plate 26 Insulator 27 Next process transport conveyor 28 Input port 31 Fixing screw 32 Screw rotation adjuster

Claims (10)

A large fryer having two oil tanks equipped with a negative DC potential electrode plate for suppressing oxidation of edible oil,
Each said oil tank
Conveying means for conveying the food while being immersed in cooking oil heated by at least one food conveyor;
Negative DC potential generating means for generating a negative DC potential;
An insulated cable for supplying the generated negative DC potential;
A negative DC potential electrode plate that is immersed in cooking oil and applies the negative DC potential supplied by the insulated cable to the cooking oil;
Insulating means for insulating the large fryer and the negative DC potential electrode plate;
An electrode plate attachment means including the insulated cable for attaching the negative DC potential electrode plate to the large fryer;
Large automatic fryer characterized by having.   The negative DC potential electrode plate is formed in the edible oil in the gap between the inner wall surface of the oil tank and the conveying means and in the edible oil in the gap between the bottom surface of the oil tank and the conveying means. 2. The large-sized automatic fryer according to claim 1, wherein the large-sized automatic fryer is installed by the electrode mounting means while maintaining an insulation state with the means.   The area on one side of the negative DC potential electrode plate immersed in the edible oil and in contact with the edible oil is X (electrode plate area) ≧ when the oil amount is 120 liters or less and the fryer oil amount is Y Set to 1/300 × Y (oil amount) + 2.6 ± 0.4, and when the oil amount is 120 liters or more, X (electrode plate area) ≧ 1/300 × Y (oil amount) + 16.4 ± 0.4 The large-sized automatic fryer according to claim 1 or 2, wherein   The large automatic fryer according to claim 1 or 2, wherein the amount of oil in the large automatic fryer is 120 liters or less. The area of one surface of the negative DC potential electrode plate immersed in the edible oil and in contact with the edible oil is 2.0 to 4.0 cm ² / liter per liter of unit oil. Item 5. A large automatic fryer according to Item 4.   The large automatic fryer according to claim 1 or 2, wherein the amount of oil in the large automatic fryer is 120 liters or more. The area of one surface of the negative DC potential electrode plate immersed in the edible oil and in contact with the edible oil is 16.0 to 18.0 cm ² / liter per liter of unit oil. Item 7. The large automatic fryer according to Item 6.   2. The large-sized automatic fryer according to claim 1, wherein the insulating means holds an interval between an inner wall surface and a bottom surface of the large-sized automatic fryer and the negative DC potential electrode plate at 3 to 10 mm.   The large automatic fryer according to any one of claims 1 to 8, wherein a negative DC potential applied to the edible oil is -4000 to -12000V. The negative DC potential generating means;
The insulated cable;
The negative DC potential electrode plate;
Said insulating means;
The electrode plate mounting means;
An edible oil oxidation control device for a large-sized automatic fryer characterized by comprising:

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