JP2816271B2 - Continuous frying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous frying apparatus which is most suitable for frying various frying materials. More specifically, the present invention relates to a frying apparatus which does not cause deformation or destruction of the material at the time of frying. The present invention relates to a continuous frying apparatus that can fry each material uniformly.

[0002]

2. Description of the Related Art Conventionally, a primary oil-lifting tank for transporting an oil-lifting material by an oil flow, a secondary oil-lifting tank for carrying out oil-lifting while holding the oil-lifting material below the oil level by using a carrier, and a primary oil-lifting tank. As a continuous oil-lifting device comprising a joint section connecting the oil-lifting tank and the secondary oil-lifting tank, for example, Japanese Patent Publication No. 3-349
No. 27 is known. According to such an apparatus, first, the frying material such as a snack material mainly composed of starch is solidified to the extent that it is not deformed by an external force in the initial frying step, that is, in the first frying tank. Then, the solidified fried raw material is received by the projecting piece of the carrier in the joint section, and is transferred to the next frying step in accordance with the movement of the carrier. In the next frying step, that is, frying in the secondary frying tank, the product can be expanded and dried without giving much consideration to deformation, so that a uniform and highly expanded product without deformation can be finally obtained.

However, in the above-described apparatus, the fried material fried in the primary fry tank flows down with oil at a relatively high speed in the joint section. Collide at high speed. Therefore, although the fried material is solidified to the extent that it does not deform in the initial frying, there is a problem that it is deformed or broken because it receives a considerably strong impact. Further, the falling oil collides with the protruding piece and flows along the protruding piece in the direction of the root of the protruding piece, so that turbulent flow occurs at the oil inflow point of the secondary oil lifting tank. Therefore, there is a problem that the fried material does not flow smoothly into the second fry tank and the fried material fluctuates.

[0004]

DISCLOSURE OF THE INVENTION The present inventors have made intensive studies for the purpose of solving the above problems. As a result, by setting the contact point between the tip of the projecting piece of the carrier and the oil level in the joint section at a specific position, deformation and destruction of the oil-lifting material in the joint section can be prevented, and the oil-lifting material is moved to the secondary oil-lifting position. It has been found that since it can flow smoothly into the tank, it is possible to finally obtain a uniform and highly expanded product without deformation.

The gist of the present invention, which has been completed based on the above findings, is that the first oil-lifting tank 2 for transporting the oil-lifting material A by an oil stream.
Rotating members 3, 4, 5, a traveling member 6 wrapped around the rollers and interlocked with the rollers, and the traveling members 6
The second oil-lifting tank 9 for carrying out oil-lifting while holding the above-mentioned oil-lifting material A under the oil level using the carrier 8 comprising the projecting pieces 7 mounted on the outer peripheral surface of the first oil-lifting tank 2 and the second oil-lifting tank 2 In the continuous oil-lifting device 1 composed of the joint section 10 connecting the secondary oil-lifting tank 9, the projecting piece 7 and the oil level of the secondary oil-lifting tank 9
So that the angle formed is between 30 ° and 50 °
The projecting piece 7 is mounted on the outer peripheral surface of the traveling member 6 and the second
Joint section installed at an angle toward the next oil lifting tank 9
The inclination of the part 10 is set to 30 ° to 60 ° and
When the projecting piece 7 travels along the roller 3 on the starting end side of the secondary oil lifting tank, the intersection 14 between the outer circumference 12 of the circle drawn by the tip 11 of the projecting piece and the oil level 13 is The roller 3 on the starting end side is mounted so that the oil level flowing down from the secondary oil lifting tank is located closer to the terminal end of the secondary oil lifting tank than the position 15 where the oil level in the secondary oil lifting tank is substantially the same. It is a continuous oil-lifting apparatus characterized by the above-mentioned.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the continuous frying apparatus of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic structural view of a continuous oil fryer of the present invention. FIG. 2 is a partial sectional view near the joint section.

[0008] The continuous oil fryer 1 of the present invention comprises a relatively shallow primary oil fry tank 2 and a relatively deep secondary fry tank 9. These two fry tanks are connected via a joint section 10 so that the fry material A flows smoothly together with the oil from the first fry tank 2 to the second fry tank 9.

A supply pipe 16 communicates with the starting end of the primary oil-lifting tank 2 through an opening so that the inflowing oil flows laminar in parallel with the bottom of the oil-lifting tank. In this case, in order to prevent generation of turbulence of the inflowing oil in the primary oil lifting tank 2 and to obtain a desired laminar flow, the opening is provided over the entire width of the primary oil lifting tank. desirable. The inclination and length of the primary fry tank 2 are determined by the type, amount and shape of the fried material to be treated.
What is necessary is just to set suitably according to the flow rate of oil, etc. For example, moisture 3
In the case of adjusting the water content of the fried material of about 5 to 45% to about 5 to 15% after the first frying treatment in order to prevent the adhesion of the materials, the oil temperature is 150 to 200 ° C, and the oil flow rate is 10
When processing under conditions of ４０40 m / min and residence time of 10 to 25 sec, the inclination of the primary oil fry tank is set to 0.2 to 0.3.
And the length is preferably adjusted to 5 to 7 m.

In the secondary oil-lifting tank 9, there is provided a carrier 8 for transporting the oil-lifting material A while being immersed in oil, from the beginning to the end of the oil-lifting tank. The transport body 8 is composed of, for example, rotating rollers 3, 4, 5 whose rotation speed can be freely adjusted by a motor with a continuously variable transmission and the like, and a traveling member 6 mounted on and interlocked with the rollers. .
Further, each roller can be attached so as to be movable in the vertical or horizontal direction so that the set position of the protruding piece 7 or the like can be changed. Further, the roller 5 is desirably installed so that the traveling member 6 travels obliquely upward toward the rear end of the secondary oil fry tank. In this case, the angle a formed by the oil surface and the traveling member 6 is 3 to 20 °.
Set up so that.

The traveling member 6 is made of a heat-resistant plastic sheet made of Teflon, polyethylene or the like and provided with a large number of small holes of an arbitrary shape (size not to allow passage of the oil-lifting material).
Alternatively, a porous sheet such as a stainless steel or iron net can be used. The portion traveling below the traveling member is located below the oil level, and effectively prevents the floating material in the secondary oil tank from floating on the oil level.

In the drawing, reference numeral 7 denotes a protruding piece protruding from the outer peripheral surface of the traveling member 6 at an appropriate angle. The projecting piece is made of the fried material A
The angle b formed by the oil surface and the projecting piece is 30 to 5 so that the oil can be easily poured under the oil surface without damaging the oil.
It is preferable that the angle is 0 °. The oil-lifting material A that has flowed in from the primary oil-lifting tank is accommodated in a partitioned space 31 formed by an adjacent protruding piece and the wall surface of the secondary oil-lifting tank, and is conveyed in the oil according to the movement of the traveling member 6. The present invention is particularly characterized by specifying the position of the tip of the protruding piece 7, and consequently is characterized by specifying the mounting position of the roller 3 on the starting end side. That is, when the protruding piece travels along the roller 3 on the starting end side of the secondary oil lifting tank, the intersection 14 between the outer circumference 12 of the circle drawn by the tip of the protruding piece and the oil surface 13 becomes the first point. So that the oil level that has flowed down from the secondary oil lifting tank is located closer to the end of the secondary oil lifting tank than the position 15 that is flush with the oil level in the secondary oil lifting tank,
Attach the roller 3 on the starting end side. In this case, more preferably, the intersection point is set so that the fried material smoothly flows into the secondary fry tank without being obstructed by the projecting pieces, and the fried material does not stay on the oil surface for a long time. The distance between the position 14 and the oil surface position 15 is set.

When the starting roller 3 is mounted, there is a correlation with the length of the protruding piece 7. If the protruding piece is long, the above-mentioned condition of the mounting position of the starting roller 3 is substantially satisfied. Is closer to the end of the secondary oil fryer,
It is natural that the opposite is true if the protruding piece is short. The length of the protruding piece 7 varies depending on the type, shape, and the like of the fried material A. For example, in the case of a chip piece, the thickness when four to five swollen chip pieces are overlapped is set. Slightly longer than the length equivalent to (3
(About 0 to 70 mm). Thus, the fried material A can be stably conveyed by the protruding pieces and fried uniformly. The distance between the tip 11 of the protruding piece and the bottom surface of the secondary oil-lifting tank 9 is set so that the oil-lifting material is not clogged in the gap between them, and deformation and breakage do not occur. For example, in the case of a chip piece, a length (about 10 to 50 mm) corresponding to a thickness when at least two or three expanded chip pieces are overlapped is secured.

The protruding piece 7 may be used as desired, such as a plate-shaped plate or a plate provided with a hole. The plate-shaped material is effective when the fried material is pushed up and discharged to a discharge conveyor or the like via an oil level. On the other hand, when a perforated sheet such as a metal net is used, it is possible to effectively peel off the fried material adhering to the projecting pieces while traveling in the secondary fry tank. Also, at the bottom of the tank at the end of the secondary oil lifting tank 9,
An oil sump 17 is provided by breaking a metal net, and the oil sump communicates with a discharge pipe 18.

The joint section 10 connects the primary oil-lifting tank 2 and the secondary oil-lifting tank 9 and smoothly flows oil and oil-lifting material A from the primary oil-lifting tank into the secondary oil-lifting tank. Skew toward the secondary oil fry tank. The inclination is desirably about 30 to 60 °. That is, if the angle is set to be larger than the above range and the downflow speed is increased, turbulent flow occurs in the inflow portion of the oil in the secondary oil lifting tank, which is not preferable. On the other hand, if the angle is made smaller than the above range and the falling speed is reduced, a problem arises that the fried material stays on the oil surface.

A discharge pipe 18 communicating with the oil sump 17
Further includes an oil circulation pump 19, an oil circulation amount adjusting valve 2
0, via an oil strainer 21 and a heat exchanger 22 for oil heating, are connected to a supply pipe communicating with the starting ends of the primary oil lifting tank 2 and the secondary oil lifting tank 9 to form an oil circulation path.
In the continuous oil-frying device of the present invention, the oil-cooling heat exchanger (not shown) is replaced with an oil-cooling heat exchanger (not shown) for the purpose of rapidly cooling the oil used after the completion of the oil-frying process and preventing the deterioration of the oil. It is also possible to provide it on a different route from that of the first embodiment. The supply of the new oil to the circulation path is performed by opening the adjustment valve 24 as necessary through a new oil supply pipe 25 connected to the discharge pipe from the new oil tank 23 via the adjustment valve 24. 2 in the figure
Numeral 6 is a hood, which extends from the beginning of the primary oil fry tank to the end of the secondary oil fry tank above the oil fry tank.

In the figure, reference numeral 27 denotes a discharge conveyor for discharging the product, which has been completely oil-fed by the secondary oil-lifting tank, out of the secondary oil-lifting tank, and also serves as an oil drainer. Discharge conveyor 27
Is formed substantially parallel to the running member or in a direction in which both are separated, such that the lower end is located in the oil and the upper end is located outside the oil level, specifically, the conveyor surface and the oil level. The angle c is set to be 3 to 7 degrees. Further, the discharge conveyor is provided with an intersection 29 between the surface portion 28 of the discharge conveyor and the oil level 13 and an end portion side of the secondary oil storage tank so that the finished product does not stay on the oil level for a long time. At a predetermined distance between the oil surface 13 and the intersection 30 of the tip 11 of the projecting piece. The material of the belt of the discharge conveyor is not particularly limited as long as it has heat resistance, for example, iron, stainless steel, or the like.
Also, so that the fried product does not slip into the oil again,
It is preferable to use a material whose surface has been subjected to unevenness processing or a net so that oil removal can be performed at the same time.

Next, an example of a method of frying by the continuous fryer of the present invention will be described. First, the fry material A is continuously charged into the starting end of the first fry tank 2 by an appropriate charging method. High-temperature oil always flows into the primary oil-lifting tank from the supply pipe 16 through the opening. In addition, since the primary oil-lifting tank is relatively shallow and inclined toward the secondary oil-lifting tank, a laminar flow is generated from the start end to the end of the tank, so that the supplied oil-lifting material receives any external force. The initial fry is performed while being carried on the oil flow without being transported. What is essential here is to adjust the flow rate of the oil in the primary fry tank in accordance with the amount of oil frying treatment (adjustment of the supply amount of the fried raw material to the primary fry tank) and the desired fry time (ie, (Adjustment of Supply Amount of Oil to Primary Oil Frying Tank) Oil frying is performed in a state where the frying materials do not overlap each other as much as possible, in other words, in a substantially single-layer state. More importantly, in order to prevent the fried material from being deformed or broken at the time of the second frying, it is desirable that the water content after the first frying treatment is reduced to about 7% or less based on the above adjustment. In order to prevent the fried ingredients from adhering to each other at the time of the second frying, the water content after the first frying treatment should be 1%.
It is desirable to make it about 5% or less. Adjustment of the supply amount of oil to the primary oil lifting tank is appropriately performed by opening and closing the oil circulation amount adjustment valve 20.

The fried material which has been fried in the primary fry tank is solidified to such an extent that the fried material does not adhere to each other and is unlikely to be deformed. It flows down to the second oil fry tank. At this time, the starting roller 3
Is installed at a position that satisfies the conditions described above.
The fried material flowing down with the oil does not collide with the projecting piece of the carrier, and does not deform or break. In addition, since the fried material that has flowed down to the secondary frying tank is guided below the oil surface according to the flow of the oil, it is fried without stagnation on the oil surface, and as a result, uniform frying that does not cause variation is caused. Processing is performed.

Next, the oil-fed raw material A, which has flowed down to the starting end of the secondary oil-lifting tank, is sequentially stored in a plurality of units in the partitioned space 31, and is subjected to oil-fed processing while being transported below the oil level according to the movement of the traveling member. You. In this case, by setting the speed of the oil flowing through the oil fry tank and the speed of the traveling member to be substantially the same, turbulence in the partitioned space 31 can be effectively prevented. Since the new oil is forcibly supplied from the lower part of the starting end of the secondary oil fry tank as needed, it is expected that the flow rate of the new oil will lead to the operation of guiding the fried material to the transport body below the oil level. It can be sufficiently and uniformly expanded and dried. In addition, debris such as debris of the material deposited on the bottom of the oil fry tank can be flushed toward the oil sump. Also,
When the protruding piece is in the form of a perforated sheet, it is possible to effectively peel off the fried material adhered to the protruding piece while traveling in the secondary oil fry tank.

In the secondary oil-lifting tank, oil is supplied at any time, and the oil level and the running member are adjusted so that the portion running below the running member is always below the oil level. It is necessary to do inside. Also, in some cases, the oil level adjusting valve 32 provided in the middle of the discharged pulp may be appropriately closed (usually in an open state) to maintain the oil level of the secondary oil lifting tank. The moving speed of the traveling member is appropriately adjusted according to the processing time and the processing amount in the secondary oil lifting tank. In addition, since the fried material flowing into the secondary fry tank is solidified to the extent that it does not deform due to the initial fry,
Deformation does not occur even if they overlap each other.

As described above, while being held under the oil level up to the end of the secondary oil lifting tank, the oil is conveyed in the oil and floated on the oil level. By being swept toward, it is transferred to the conveyor. Then, the oil is drained by the conveyor and discharged out of the lifting tank. Next, it is cooled by an appropriate method to obtain a fried product. The key here is to keep the fried products from breaking,
A fixed distance is provided between the tip of the projecting piece and the surface of the discharge conveyor, and furthermore, the traveling member is caused to run obliquely upward so that the fried product is not scraped up by the projecting piece, and the discharge conveyor is moved substantially in parallel with the running member. Installing and discharging the fried product.

[0023]

As described above, according to the continuous oil-lifting device of the present invention, the oil-lifting material flowing down together with the oil in the joint section does not collide with the projecting piece of the carrier, so that no deformation or breakage occurs. In addition, since turbulent flow at the location where oil flows down to the secondary oil lifting tank and stagnation of the oil floating material flowing down to the secondary oil lifting tank on the oil surface can be prevented, uniform oil lifting processing that does not cause variation is achieved. Will be applied. As a result, it is possible to obtain a uniform and highly puffed fried product without deformation or breakage.

Further, since the fried material is not broken between the projecting piece and the bottom surface of the secondary fry tank, a product having a good shape without breakage can be obtained. Further, since new oil is supplied from the lower part of the starting end of the secondary oil fry tank, the material can be sufficiently and evenly expanded and dried, and the debris such as debris of the material deposited on the bottom of the oil fry tank is removed by the oil. Can be flushed towards the reservoir. Further, when the protruding piece is in the form of a perforated sheet, it is possible to effectively peel off the fried material adhered to the protruding piece while traveling in the secondary oil fry tank.

[0025]

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a continuous frying apparatus of the present invention.

FIG. 2 is a partially enlarged schematic configuration view near a joint section.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Continuous oil-lifting apparatus 2 Primary oil-lifting tank 3,4,5 Rotating roller 6 Running member 7 Projection piece 8 Carrier 9 Secondary oil-lifting tank 10 Joint section 11 Tip of projecting piece 12 Circle drawn by the tip of projecting piece 13 Oil level 14 Intersection between outer circumference and oil level 15 Position where the oil level flowing down from the primary oil lifting tank becomes the same as the oil level in the secondary oil lifting tank 16 Supply pipe 17 Oil reservoir 18 Discharge pipe 19 Oil circulation Pump 20 Oil circulation amount adjustment valve 21 Oil strainer 22 Oil heating heat exchanger 23 New oil tank 24 Adjustment valve 25 New oil supply pipe 26 Hood 27 Discharge conveyor 28 Discharge conveyor surface 29 Intersection 30 Intersection 31 Partition space 32 Oil level adjustment valve

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-49124 (JP, A) JP-A-54-84074 (JP, A) JP-B 3-34927 (JP, B2) (58) Field (Int.Cl. ⁶ , DB name) A47J 37/12

Claims (1)

(57) [Claims] 1. A primary oil-lifting tank 2 for transporting an oil-lifting material A by an oil flow, rotating rollers 3, 4, 5, a traveling member 6 mounted on the rollers and interlocked with the rollers, and the traveling member 6. The second oil-lifting tank 9 for carrying out oil-lifting while holding the above-mentioned oil-lifting material A under the oil level using the carrier 8 comprising the projecting pieces 7 mounted on the outer peripheral surface of the first oil-lifting tank 2 and the second oil-lifting tank 2 In the continuous oil-lifting apparatus 1 including the joint section 10 connecting the secondary oil-lifting tank 9, the projecting piece 7 and the oil surface of the secondary oil-lifting tank 9 are formed.
The protruding piece 7 so that the angle is 30 ° to 50 °.
Attached to the outer peripheral surface of the traveling member 6 and directed toward the secondary oil lifting tank 9
Of the joint section 10 installed at an angle
When the protruding piece 7 travels along the roller 3 on the starting end side of the secondary oil fry tank, the outer circumference 12 of the circle drawn by the tip 11 of the protruding piece is set to 30 ° to 60 °.
Between the oil level 13 and the oil level 13 is located closer to the end of the secondary oil lifting tank than the position 15 where the oil level flowing down from the primary oil lifting tank is substantially the same as the oil level in the secondary oil lifting tank. And a roller 3 on the starting end side.