JP4248601B1 - Rotary cooling device - Google Patents

Abstract

Provided is a rotary cooling device that can cool a raw material uniformly and in a short time with a small device, and is effective for single freezing and loose freezing.
A rotating cylinder, a central cylinder disposed on a rotating shaft of the rotating cylinder, and an inner surface of the rotating cylinder and an outer surface of the central cylinder are connected to form the rotating cylinder and the central cylinder integrally. And a plurality of radial partition plates 15 that divide an annular space formed between the inner surface of the rotating cylinder and the outer surface of the central cylinder into a plurality of circumferential processing chambers 14, and both ends of the rotating cylinder. The inner surface of the processing chamber in the cooling cylinder 18 provided with the raw material inlet 16 and the product outlet 17 is formed into a tapered surface that expands from the raw material inlet side toward the product outlet side.
[Selection] Figure 1

Description

  The present invention relates to a rotary cooling device, and more particularly to a rotary cooling device for cooling and freezing foods and chemicals. For example, freezing a mackerel, horse mackerel, etc. In addition, the present invention relates to a rotary cooling device suitable for performing freezing of a piece of frozen shrimp, cherry shrimp, shirasu, etc. in a separate state.

  As a method of cooling and freezing raw materials such as corn, cooked rice and seafood, and injectable drugs, dry ice, liquid nitrogen, low-temperature air and other coolants and raw materials produced in a freezer A method of stirring after being put in is adopted.

  For example, to the cylindrical container having a plurality of compartments partitioned in the vertical direction by a breathable shelf plate, while supplying the cooling gas from the lower part to the upper part, the raw material is supplied from the upper part of the cylindrical container, A freezing method and apparatus are known in which raw materials are sequentially transferred to lower compartments intermittently, the raw materials are stirred in each compartment, and a product frozen in a rose shape is carried out from the bottom of a cylindrical container (for example, patents) Reference 1).

There is also known a rotary cooling and freezing device using a rotating drum whose rotating shaft is oriented in the horizontal direction (see, for example, Patent Document 2). An example of a conventional rotary cooling and freezing apparatus is shown in a side view in FIG. The rotary cooling / freezing device 80 includes a rotary drum 82 provided with a plurality of blades 81 on the inner peripheral surface, and a shaft body 83 provided with a plurality of rotary blades 84 on the rotary shaft portion of the rotary drum 82. The drum 82 and the shaft 83 are rotated in opposite directions, the raw material and the coolant are introduced from one end inlet of the rotary drum 82, and the frozen product is carried out from the other end outlet.
Japanese Unexamined Patent Publication No. 63-279772 Japanese Utility Model Publication No.53-3272

  According to Patent Document 1, since the raw material is transferred vertically from top to bottom, the installation area of the cylindrical container is reduced, and the blower can be installed outside the cylindrical container. It is described that the thermal efficiency is high because the cold air passes through the raw material a plurality of times. However, in this apparatus, since the movement of the raw material during processing is linear and gentle, the distance that the raw material moves until it is cooled and frozen (hereinafter also referred to as “freezing distance”) is short. Therefore, there is a problem that cooling efficiency is low, cooling and freezing in a short time are difficult, and the scale of the apparatus is still large.

  Further, according to Patent Document 2, since only the surface of the raw material particles is stirred while being frozen, it can be frozen in a rose shape by preventing caking between the raw material particles, and by forming an outer film by surface freezing. It is described that the outer shape of the raw material particles can be maintained. However, if the raw material with a lot of moisture is frozen on the surface continuously, such as peeled shrimp, cherry shrimp, and shirasu, the raw material adheres to the inner wall of the rotating drum, the blade and the rotor blade of the shaft body due to the moisture on the surface of the raw material. If it freezes and grows and freezes into a large lump, the device will not operate smoothly, and the freezing efficiency will decrease.

  Further, in an aspect in which a rotating drum provided with a plurality of blades on the inner surface and a shaft provided with a plurality of rotating blades are rotated in opposite directions, it becomes a bowl shape due to kneading and kneading by forced stirring, Quality deteriorates. Furthermore, the inner surface of the rotating drum is in contact with the raw material only on the lower surface and the lower half surface in the rotational direction rising side, from the upper half portion in the rotational direction rising side to the upper surface, and in the rotational direction lower side surface Since it was hardly in contact with the raw material, it was in a wasteful state.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary cooling device that can cool a raw material uniformly and in a short time with a small device and is effective for single freezing and loose freezing.

  In order to achieve the above object, a rotary cooling device according to the present invention includes a rotating cylinder having a rotating shaft in a horizontal direction, a center cylinder disposed on a rotating shaft portion of the rotating cylinder, an inner surface of the rotating cylinder, and the center. The rotating cylinder and the central cylinder are integrated by connecting between the outer surfaces of the cylinders, and a plurality of annular spaces formed between the inner surface of the rotating cylinder and the outer surface of the central cylinder are arranged in the circumferential direction. A cooling cylinder having a plurality of radial partition plates partitioning into the processing chamber, a raw material inlet provided at one end of the rotary cylinder, and a product outlet provided at the other end, and the raw material input A rotary cooling device that distributes the raw material charged into the mouth into the processing chambers and cools them, and carries the cooled product out of the product outlet, wherein the inner surface of the processing chamber is connected to the raw material inlet. The taper surface is widened from the side toward the product exit side. .

  Furthermore, in the rotary cooling device of the present invention, the inner surface of the rotary cylinder is a tapered surface that expands from the raw material inlet side toward the product carry-out side, and the outer surface of the central cylinder is the raw material It is characterized by a tapered surface that shrinks from the inlet side toward the product outlet side.

  Further, a plurality of the cooling cylinders are arranged in series from the raw material inlet side to the product outlet side, and a primary cooling product carried out from the product outlet of the cooling cylinder arranged on the raw material inlet side is arranged on the product outlet side. It is characterized by comprising a guide member for feeding into the product raw material inlet of the cooling cylinder arranged in the box.

  Furthermore, the angle of the tapered surface of the processing chamber in the cooling cylinder arranged on the raw material inlet side is formed larger than the angle of the tapered surface of the processing chamber in the cooling cylinder arranged on the product outlet side, the raw material inlet The number of processing chamber sections in the cooling cylinder arranged on the side is formed to be larger than the number of processing chamber sections in the cooling cylinder arranged on the product outlet side, and the cooling cylinder arranged on the raw material inlet side is rotated. The number is set faster than the number of rotations of the cooling cylinder arranged on the product outlet side.

  According to the rotary cooling device of the present invention, the charged raw material is distributed to each processing chamber and conveyed to the outlet side while moving spirally in each processing chamber, cooled in the process, and further frozen. So, uniform and efficient cooling treatment and freezing treatment are possible, the raw material does not stick to the inner surface of the processing chamber, even raw materials with a lot of surface moisture can be cooled and frozen in a disjointed state, There is no degradation of quality due to kneading or kneading.

  1 to 5 show a first embodiment of the rotary cooling device according to the present invention. FIG. 1 is a front view showing an outline of the rotary cooling device, and FIG. 2 is a sectional side view showing the outline. 3 is a sectional front view of the main part, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, FIG. 5 is a sectional side view for explaining the movement state of the raw material in the processing chamber, and FIG. FIG.

  The rotary cooling device is disposed inside a rotating drum 11 with a rotating shaft directed in the horizontal direction, a rotating cylinder 12 disposed coaxially with the rotating drum 11, and a rotating shaft portion of the rotating cylinder 12. The center tube 13 is connected between the inner surface of the rotating tube 12 and the outer surface of the center tube 13 to integrate the rotating tube 12 and the center tube 13, and the inner surface of the rotating tube 12 and the outer surface of the center tube 13 Three partition plates 15 in the radial direction that divide the annular space formed between them into three processing chambers 14 in the circumferential direction, a raw material inlet 16 provided at one end of the rotating cylinder 12, and others A cooling cylinder 18 provided with a product outlet 17 provided at the end is detachably provided.

  The rotating cylinder 12, the central cylinder 13, and the partition plate 15 constituting the cooling cylinder 18 have a mesh that allows a coolant or a gas evaporated from the coolant to freely flow therethrough and does not allow a raw material or a product to pass therethrough. A (mesh plate) or a perforated plate (punching metal) having a large number of small holes is preferably formed in a predetermined shape. Further, the rotating drum 11 preferably has a heat insulating function so as not to impair the cooling effect in the rotating cylinder 12. The heat insulating function is obtained by enclosing a heat insulating material 19 such as urethane foam inside the rotating drum 11. Can be granted.

  The rotary drum 11 is supported by a plurality of support members 22 provided on a gantry 21 so as to be rotatable around a rotation axis, and a drive chain 25 is supported by an outer sprocket portion 23 and a drive motor 24. Is formed so that the rotary drum 11 can be rotated at a predetermined rotational speed by the drive motor 24. At both ends of the rotary drum 11, an inlet side exhaust duct 27 connected to the inlet exhaust blower 26 and an outlet side exhaust duct 29 connected to the outlet exhaust blower 28 are provided, respectively. It is formed to exhaust.

  Further, a raw material charging chute 31 for charging the raw material into the raw material charging port 16 is provided at one end of the rotating drum 11, and a product takeout chute 32 for taking out the product from the product carry-out port 17 at the other end. Is provided. Further, in the upper part of the apparatus, an internal temperature indicator 33 for controlling the internal temperature of the cooling cylinder 18 and the supply amount of the coolant, an internal temperature controller 34, and a coolant supply controller 35 are provided. In addition, a rotation speed control mechanism 36 and a rotary power board 37 for controlling the rotation speed of the rotary drum 11 are provided.

  The rotary cylinder 12 is formed so that the inner diameter on the raw material inlet 16 side is smaller than the inner diameter on the product outlet 17 side, and the inner surface of the rotary cylinder 12 as a whole is from the raw material inlet 16 side. A tapered surface (conical surface) that expands in the outer peripheral direction toward the outlet 17 is formed. The central cylinder 13 is formed to be shorter than the rotary cylinder 12 by the length of the raw material input port 16 and the product carry-out port 17, and has a triangular cross section by combining three plate-like members. The outer diameter of the raw material inlet 16 side (diameter of the circumscribed circle) is larger than the outer diameter of the product outlet 17 (diameter of the circumscribed circle), and the outer surface of the central cylinder 13 is The tapered surface is reduced in the direction of the rotation axis from the raw material inlet 16 side toward the product outlet 17 side.

  Thus, by forming the inner surface of the rotating cylinder 12 and the outer surface of the central cylinder 13 with the tapered surfaces as described above, the inner surface of the rotating cylinder 12, the outer surface of the central cylinder 13, and the partition plates 15 on both sides are partitioned. The inner surface of the processing chamber 14 is formed into a tapered surface that expands from the raw material inlet 16 side toward the product outlet 17 side.

  The rotary cylinder 12 is inserted into the rotary drum 11 from the axial direction, and is fixed by a plurality of mounting brackets 38 in a detachable state. The central cylinder 13 having a regular triangular cross section is integrally formed by radially fixing the inner end edge of the partition plate 15 at each apex portion, and the outer end edge of the partition plate 15 is used as the rotary cylinder 12. The rotating cylinder 12, the central cylinder 13 and the partition plate 15 are integrated to form the cooling cylinder 18 by being detachably fixed to the inner surface of the casing with an appropriate mounting bracket, and the cooling cylinder 18 is formed around the rotation axis of the rotating drum 11. 18 is formed to rotate integrally with the rotary drum 11.

  Therefore, the plurality of processing chambers 14 are arranged radially in the circumferential direction with respect to the rotation axis of the rotary drum 11, and revolve around the rotation axis around the rotation axis. The raw material charged into the processing chamber 14 provided in such a state moves from the raw material charging port 16 side to the product discharge port by the action of the tapered surface while moving along the wall surface in the rotating processing chamber 14. Move towards the 17th side.

  For example, as shown in FIG. 5, in one processing chamber 14, the raw material at position A shown in FIG. 5A is rotated in the clockwise direction indicated by arrow Y in FIG. When 14 is in the state shown in FIG. 5B, the position A moves from the position A along the one partition plate 15 to the position B on the outer surface of the center tube 13 as shown by the arrow Y1, and the processing chamber 14 is further moved. When rotated to the state shown in FIG. 5C, as indicated by the arrow Y2, it moves from the position B to the position C along the outer surface of the central tube 13 and the other partition plate 15. Then, when the processing chamber 14 is rotated to the state shown in FIG. 5D, it moves from the position C to the position D along the inner surface of the rotary cylinder 12 as indicated by the arrow Y3, and the cooling cylinder 18 makes a round. When the processing chamber 14 rotates to the state shown in FIG. 5E, it moves from the position D to the position E along the inner surface of the rotary cylinder 12, that is, the same position as the position A, as indicated by an arrow Y4. .

  That is, the raw material in the processing chamber 14 reaches the position E from the position A through the positions B, C, and D as represented by the arrows Y1 to Y4 by the revolution of the processing chamber 14 around the rotation axis. Return to position A. Accordingly, the raw material moves so as to circulate in the processing chamber 14 along the inner surface of the rotating cylinder 12, the outer surface of the central cylinder 13, and the front and rear surfaces of the pair of partition plates 15. Due to the action of the tapered surface provided on the inner surface, the outlet side expands to move from the raw material inlet 16 side toward the product outlet 17 side. As shown in FIG. 6, the movement of the raw material is a movement toward the exit direction while performing a spiral (hereinafter also referred to as “spiral”) motion S relative to the processing chamber 14.

  The angle of the tapered surface on the inner surface of the rotating cylinder 12 and the outer surface of the central cylinder 13 with respect to the rotation axis is the axial length of the processing chamber 14, the number of sections, the number of rotations, the properties of the raw material, the raw material temperature, the product temperature, In general, if the angle of the taper surface with respect to the rotation axis is increased, the movement of the raw material to the outlet side is promoted to increase the processing capacity, and the dispersion effect of the raw material and the spiral are varied. The freezing of the rose can be easily performed by promoting the surface freezing by increasing the motion effect of the shape. However, if the angle of the taper surface with respect to the rotating shaft is too large, the movement of the raw material to the outlet side becomes too fast and it becomes difficult to obtain a sufficient cooling effect, and there is a possibility that uniform and reliable cooling treatment cannot be performed. . From these facts, the angle of the taper surface with respect to the rotation axis is in the range of 1/130 to 1/5, preferably 1 / 32.5 to 1/11, more preferably 1/16 to 1/1 in terms of taper. It is about 22 and is preferably about 1 to 2 degrees in terms of angle. Further, the angle can be changed at the intermediate portion of the rotary cylinder 12 and the central cylinder 13.

  The taper is the same as a taper screw defined by JIS. For example, a 1/16 taper means that the diameter changes by 1 mm with respect to an axial length of 16 mm. . Further, in the case of a polygonal shape such as a triangle like the central cylinder 13 shown in this embodiment, the taper is expressed by the diameter of a circle circumscribing the polygon and the axial length of the central cylinder 13.

  Here, the horizontal direction of the rotary shaft of the rotary drum 11, that is, the rotary shaft of the rotary cylinder 12 provided coaxially with the rotary drum 11 does not have to be strictly horizontal, and the outlet side is not in the inlet side. It may be rising or falling. However, when the outlet side of the rotating cylinder 12 is raised, it is necessary to set the rising angle smaller than the angle of the tapered surface so that the tapered surfaces on the inner surface of the rotating cylinder 12 and the outer surface of the central cylinder 13 do not rise upward. . On the other hand, when the outlet side of the rotary cylinder 12 is lowered, in order to avoid the raw material in each processing chamber 14 from sliding down to the outlet side without being sufficiently cooled, the angle of the tapered surface should be up to about 5 degrees. Is preferred.

  In the rotary cooling device formed in this way, the rotating drum 12 is rotated by operating the driving motor 24 by the rotation speed control mechanism 36 and the rotary power board 37, whereby the rotating cylinder 12, the central cylinder 13 and the partition are separated. While the processing chamber 14 partitioned by the plate 15 is rotated in a revolving state on the circumference around the rotation axis, a predetermined amount of raw material is charged from the raw material charging chute 31 to the raw material charging port 16, and By supplying a predetermined amount of coolant into the processing chamber 14 by the internal temperature controller 34 and the coolant supply controller 35, the raw material can be cooled or frozen.

  As the coolant, an appropriate coolant can be used according to the type of raw material and the cooling temperature. For example, low-temperature liquefied gas such as liquid nitrogen, low-temperature cooling air, dry ice, or the like can be used. The coolant can be introduced into the cooling cylinder 18 by an appropriate means. For example, when a low-temperature liquefied gas is used, a low-temperature liquefied gas supply pipe and a jet are disposed near one or both openings of the rotary drum 11. A low-temperature liquefied gas may be injected into the cooling cylinder 18 by providing a nozzle. When using low-temperature cooling air, the low-temperature cooling air may be circulated from the outlet side of the rotating drum 11 toward the inlet side. When dry ice is used, it can be mixed with the raw material and charged from the raw material charging chute 31, or can be charged from a separately provided dry ice charging chute to the raw material charging port 16. The gas vaporized from the low temperature liquefied gas or dry ice can be safely exhausted from the inlet side exhaust duct 27 and the outlet side exhaust duct 29.

  An appropriate amount of the raw material charged from the raw material charging chute 31 to the raw material charging port 16 is distributed from the raw material charging port 16 into each processing chamber 14 as the cooling cylinder 18 rotates. The product is cooled by a coolant while moving in a spiral shape, and is taken out as a product through a product takeout chute 32 from a product carry-out port 17.

  As described above, the raw material being cooled moves along the inner surface of the rotating cylinder 12, the outer surface of the central cylinder 13, and the front and rear partition plates 15 that define the processing chamber 14 as the processing chamber 14 rotates (revolves). In addition to the movement, a reversal or rotation motion is added at the corners where each surface intersects, and the entire inner surface of the processing chamber 14 is effectively used to cool the material while moving it spirally and transport it to the outlet side. The momentum of the raw material is increased as compared with the conventional case, the raw material is efficiently cooled, and the distance traveled before freezing (hereinafter referred to as the freezing distance) can be extended.

  Therefore, when the raw material is cooled, the cooling efficiency, particularly when it is frozen, can be greatly increased, the surface freezing of the raw material is promoted, and a uniform cooling treatment / freezing treatment is possible. Furthermore, since the cooling efficiency is increased, the processing capacity is increased as compared with the conventional one, the length of the cooling cylinder 18 can be shortened, and a high-performance cooling device can be achieved while reducing the size and price of the device. Can be provided.

  In addition, since surface freezing is promoted, even when peeled shrimp, cherry shrimp, shirasu, etc., with a large amount of moisture on the surface are used as raw materials, adhesion of the raw materials to each surface of the processing chamber 14 can be prevented. Rose freezing can be performed easily and reliably even with raw materials with high moisture content. Furthermore, since the raw material is cooled while moving in a smooth and gentle spiral shape, it does not become cocoon-like by kneading and kneading, and the quality does not deteriorate.

  The rotation speed of the cooling cylinder 18 can be arbitrarily set according to conditions such as the type of raw material, the size of the cooling cylinder 18 and the number of compartments of the processing chamber 14. When it is slow, the residence time of the raw material in each processing chamber 14 becomes long, so that the freezing capacity can be increased. When the rotational speed is increased, the raw material is prevented from adhering to the inner surface of each processing chamber 14 and is shaped like a rose. It becomes easy to cool and freeze. Therefore, by providing the rotation speed control mechanism 36 so that the rotation speed of the cooling cylinder 18 can be adjusted, it is possible to cope with cooling processing and freezing processing of various raw materials.

  Furthermore, by fixing the rotating cylinder 11, the rotating cylinder 12, and the central cylinder 13 provided with the partition plate 15 with attachment means having a structure that can be easily attached and detached, these can be disassembled and cleaned individually after processing. It becomes possible, and the cleaning work of each part can be performed easily and reliably.

  In this embodiment, the inner surface of the rotating chamber 12 and the central tube 13 are used as means for making the inner surface of the processing chamber 14 a tapered surface that expands from the raw material inlet 16 side toward the product outlet 17 side. In addition to these, means for making each outer surface tapered is formed into a wedge shape in which the raw material inlet 16 side of the partition plate 15 is thick and the product carry-out port 17 side is thin. Alternatively, both surfaces can be tapered. Further, by forming at least one surface of the rotating cylinder 12, the central cylinder 13 and the partition plate 15 as a tapered surface, the inner surface of the processing chamber 14 can be a tapered surface that expands toward the outlet side.

  7 to 9 are cross-sectional views showing other embodiments of the cooling cylinder. First, in the cooling cylinder 18a shown in FIG. 7, the central cylinder 13 is formed in a regular hexagonal cross section, and the inner edges of the six partition plates 15 in the radial direction are respectively connected to the six apexes, An annular space formed between the inner surface of the rotating cylinder 12 and the outer surface of the central cylinder 13 is divided into six processing chambers 14 in the circumferential direction.

  Further, in the cooling cylinder 18b shown in FIG. 8, the central cylinder 13 is formed in a square cross section, and the inner end edges of the four partition plates 15 in the radial direction are respectively connected to the four apexes. An annular space formed between the inner surface of the cylinder 12 and the outer surface of the central cylinder 13 is partitioned into four processing chambers 14 in the circumferential direction. Further, in the cooling cylinder 18c shown in FIG. 9, the central cylinder 13 is formed in a circular cross section, and the inner edges of the four partition plates 15 in the radial direction at equal intervals (90 degree intervals) on the outer periphery of the central cylinder 13 As shown in FIG. 8, the annular space formed between the inner surface of the rotating cylinder 12 and the outer surface of the central cylinder 13 is partitioned into four processing chambers 14 in the circumferential direction. Yes.

  As described above, the shape of the center tube 13 and the number of partition plates 15 can be arbitrarily selected. When the rotary tube 12 has the same size, the smaller the number of partition plates 15, the smaller the size. Many processing chambers 14 can be formed. When processing raw materials of the same size, by forming a relatively large number of relatively small processing chambers 14, the spiral motion becomes smooth, and the material can be subdivided (separated) and the amount of processing can be increased. . On the other hand, by forming a relatively large number of processing chambers 14 in a relatively small amount, the freezing distance of the raw material in the processing chamber 14 can be increased, the freezing capacity is increased, and uniform processing is possible. Therefore, by appropriately setting the number of partition plates 15 according to the properties of the raw material, that is, the number of compartments of the processing chamber 14, the raw material can be cooled, frozen, and separated in an optimal state.

  Further, as described above, the outer surface shape of the center tube 13 may be any of the above-described embodiment, a planar shape as shown in FIGS. 7 and 8, and a curved surface shape as shown in FIG. Although it varies depending on the number of rotations of 18 or the like, generally, a flat surface is preferable to a curved surface because it is easy to obtain a smooth spiral motion and to easily increase the freezing distance. In addition, a configuration in which three partition plates 15 are provided at every other six apexes of the center cylinder 13 having a regular hexagonal cross section is possible, and the cross-sectional shape of the rotary cylinder 12 is the same as that of the center cylinder 13. It can be a polygonal structure.

  FIG. 10 is a cross-sectional front view of an essential part showing a second embodiment of the rotary cooling device of the present invention. The rotary cooling device shown in the present embodiment is a multi-stage in which two cooling cylinders 51 and 61 formed in the same manner as described above are arranged in series inside a single rotating drum 11 from the product inlet side to the product outlet side. This is a rotary cooling device of the type.

  At the product outlet 52 of the front stage cooling cylinder 51 arranged on the product inlet side, the primary cooling product carried out from the product outlet 52 is charged with the product raw material of the rear stage cooling cylinder 61 arranged on the product outlet side. A guide member 71 for feeding into the mouth 62 is provided. The guide member 71 has an inner diameter larger than the outer diameter of the outlet portion of the central cylinder 53 of the front-side cooling cylinder 51 and has an outer diameter smaller than the inner diameter of the product raw material inlet 62 of the rear-stage cooling cylinder 61. And a flange portion 73 that connects the end portion on the product inlet side of the cylindrical portion 72 and the outlet end of the rotating tube 54 of the pre-stage side cooling tube 51. Further, a protruding portion 53 a that protrudes into the cylindrical portion 72 from the outlet end of the rotating tube 54 is provided on the outlet side of the central tube 53 of the front-side cooling tube 51.

  The raw material is first charged into the front-side cooling cylinder 51, and after being primarily cooled by the coolant in each processing chamber partitioned by the rotating cylinder 54, the central cylinder 53, and the partition plate 55 of the front-stage cooling cylinder 51, The product 53 is guided by the projecting portion 53a of the central cylinder 53 and the guide member 71 to the product raw material inlet 62 of the rear-stage side cooling cylinder 61, and the rotating cylinder 63, the central cylinder 64 and the partition plate of the rear-stage side cooling cylinder 61 are guided. Secondary cooling is performed by the coolant in each processing chamber partitioned by 65, and is carried out from the product outlet 66 of the cooling cylinder 61.

  Thus, when multistage cooling is performed by both the front-stage side cooling cylinder 51 and the rear-stage side cooling cylinder 61, particularly when the raw material is frozen by multistage cooling, the respective processes in the front-stage side cooling cylinder 51 and the rear-stage side cooling cylinder 61 are performed. The freezing efficiency of the raw material can be further improved by appropriately setting the number of compartments and the angle of the tapered surface according to the processing state. For example, by setting the taper of the inner surface of the rotating cylinder 54 in the front stage side cooling cylinder 51 to be larger than the taper of the inner surface of the rotating cylinder 63 in the rear stage side cooling cylinder 61, the movement of the raw material is promoted in the front stage side cooling cylinder 51. As a result of the surface freezing proceeding, it can be easily separated, and in the rear-side cooling cylinder 61, the residence time of the raw material can be lengthened and uniform and reliable freezing treatment can be performed. That is, the front and rear cooling cylinders 51 and 61 share functions, and the front cooling cylinder 51 arranged on the inlet side is used for cooling and surface freezing, and the rear cooling cylinder 61 arranged on the outlet side is used. By using it for freezing, the freezing treatment efficiency of the raw material can be greatly improved.

  In addition, the processing efficiency can be improved by optimizing the number of processing chamber sections in both cooling cylinders 51 and 61. For example, the front-stage cooling cylinder 51 is formed with six relatively small processing chambers using six partition plates 55, and the rear-stage cooling cylinder 61 is relatively large using four partition plates 65. By forming four processing chambers, the upstream cooling cylinder 51 has a large number of processing chambers, so that the effect of dispersing the raw material is enhanced, and the surface freezing can be promoted to be dispersed in a rose shape. In the cooling cylinder 61, since the processing chamber is large, the moving amount increases, and a uniform and reliable freezing process can be performed.

  Furthermore, since the guide member 71 is provided at the product carry-out port 52 of the front-side cooling cylinder 51, the primary cooling product can be prevented from spilling from the product carry-out port 52 by the flange portion 73 of the guide member 71. In addition, the primary cooling product is moved from the front side cooling cylinder 51 to the rear side cooling cylinder 61 by the cylindrical part 72 of the guide member 71 and the protruding part 53a of the central cylinder 53 protruding inside the cylindrical part 72. It can be reliably guided to the product raw material inlet 62 and transferred toward the outlet side.

  In this embodiment, a plurality of cooling cylinders 51 and 61 are installed inside one rotating drum 11 and both cooling cylinders 51 and 61 are rotated at the same rotational speed. By forming the rotary drum so that the rotational speeds of the front and rear rotary drums can be individually controlled, for example, by increasing the rotational speed of the front rotary drum, the raw material is dispersed and adhered to the wall surface. By slowing down the number of rotations of the rear-side rotating drum, the residence time of the raw material can be lengthened, and reliable cooling and freezing to the inside of the raw material can be performed. As described above, when the cooling cylinders 51 and 61 are completely divided, the front-side cooling cylinder 51 is provided at a position higher than the rear-stage cooling cylinder 61, and the product carry-out port 52 of the front-stage cooling cylinder 51 is the same as the above-described embodiment. The product takeout chute of the above is provided with the same raw material input chute as that of the above-mentioned embodiment at the product raw material input port 62 of the rear cooling cylinder 61, and both the chutes are connected in the vertical direction to form the same guide member. it can.

Example 1
As shown in the first embodiment, the freezing process was performed using a rotary cooling device having a structure in which three processing chambers 14 were provided. The rotating cylinder 12 has a length of 650 mm, the raw material inlet 16 has an inner diameter of 200 mm, and the product outlet 17 has an inner diameter of 230 mm. The central cylinder 13 has a length of 510 mm and the diameter of the circumscribed circle on the raw material inlet 16 side. Is 800 mm, the diameter of the circumscribed circle on the side of the product outlet 17 is 60 mm, and both are tapered cylinders formed of a mesh plate. The number of rotations of the cooling cylinder 18 was 13 rotations per minute, liquid nitrogen was used as the coolant, and the temperature was set to -60 ° C.

  “Shirasu” was charged from the raw material charging chute 31 at 500 g per minute. The processing time from loading to unloading was about 3 minutes, and from the product unloading port 17, a frozen shirasu that was uniformly loose-frozen could be obtained. Quality deterioration due to kneading and kneading was not recognized, and the frozen state was also very good. Shirasu was stopped after 1 hour of continuous operation, and the internal state of the cooling cylinder 18 was observed, but there was almost no adhesion of frozen material to the inside of the processing chamber.

  Under the same conditions, instead of the shirasu, sakura shrimp was added at a rate of 500 g / min. As a result, frozen cherry lobster that was uniformly frozen in a processing time of about 2.5 minutes could be obtained continuously for a long time. Furthermore, when the peeled shrimp was added at 500 g / min under the same conditions, a frozen peeled shrimp that was uniformly frozen in a processing time of about 3 minutes could be obtained continuously for a long time.

Comparative Example 1
In Example 1, the center tube 13 and the partition plate 15 of the cooling tube 18 were removed, and the freezing process was performed under the same conditions using only the rotating tube 12. As a result, with regard to shirasu, it was possible to obtain frozen shirasu that was loose-frozen in a processing time of about 9 minutes by reducing the input amount to 100 g per minute, but it started rotating about 10 minutes after the start of processing. Although it began to adhere to the inner surface of the cylinder little by little, it was not possible to perform sufficient gradation, and continuous operation for a long time was impossible. Further, with regard to cherry shrimp and peeled shrimp, adhesion to the inner surface of the rotating cylinder occurred immediately after the start of processing, and it was not possible to freeze the shrimp.

Example 2
The same rotary cooling device as in Example 1 was used, the number of rotations of the cooling cylinder 18 was set to 15 rotations per minute, and the temperature was set to -80 ° C. When shirasu was added at a rate of 500 g per minute, it was possible to obtain frozen shirasu that was uniformly frozen in about 2 minutes. Moreover, the adhesion of the frozen substance to the processing chamber inner surface was hardly seen. Similarly, when cherry shrimp was added at a rate of 500 g per minute, frozen cherry shrimp that had been uniformly frozen in about 1 minute could be obtained. Furthermore, when the peeled shrimp was added at a rate of 500 g per minute, it was possible to obtain a frozen peeled shrimp that was uniformly frozen in a processing time of about 1.5 minutes.

Example 3
The same rotary cooling device as in Example 1 was used, the number of rotations of the cooling cylinder 18 was set to 17 rotations per minute, and the temperature was set to -110 ° C. When shirasu was added at a rate of 500 g per minute, it was possible to obtain frozen shirasu that was uniformly frozen in about 1 minute. Moreover, the adhesion of the frozen substance to the processing chamber inner surface was hardly seen. Similarly, when cherry shrimp was added at a rate of 500 g per minute, frozen cherry shrimp that had been uniformly frozen in about 1 minute could be obtained. Further, when the peeled shrimp was added at a rate of 500 g per minute, it was possible to obtain a frozen peeled shrimp that was uniformly frozen in a processing time of about 1 minute.

Comparative Example 2
A freezing process was performed under the same conditions as in Examples 1 to 3 using a cylindrical (straight barrel) cylinder having a length of 650 mm and an inner diameter of 220 mm instead of the cooling cylinder 18. In addition, the inclination of the bottom surface of the cylinder was made to be the same as the inclination of the bottom surface of the cooling cylinder 18 by lowering the outlet side of the cylinder by 15 mm. Although the rotation speed was set to 13 rotations per minute and the temperature was set to −60 ° C., the shirasu was charged at 500 g per minute, but sufficient rose freezing could not be performed, and the attachment of frozen material to the inner surface of the cylinder also occurred.

Comparative Example 3
The cylinder in Comparative Example 2 was replaced with the one having a length of 2000 mm, and the freezing treatment was performed with a downward gradient of 5 degrees toward the outlet side of the cylinder, the rotation speed set to 13 revolutions per minute, and the temperature set to −60 ° C. It was. When shirasu was added at a rate of 500 g per minute, it was possible to obtain frozen shirasu that had been frozen in about 9 minutes. However, the obtained frozen shirasu was partially broken and broken due to rubbing with the wall surface and contact between the shirasu. Also, due to the adherence of frozen material to the inner surface of the cylinder, the freezing process had to be stopped in about several tens of minutes.

Comparative Example 4
Freezing treatment was performed using a cylinder (no rotor blades) in which eight blades as described in Patent Document 2 were provided at 45 ° intervals on the inner surface of the cylinder of Comparative Example 3. In the case of shirasu, freezing treatment to some extent was possible, but not only breakage and chipping, but also quality degradation thought to be caused by kneading and kneading due to impact when falling from the blade was observed. In addition, as in Comparative Example 3, a large amount of frozen material adhered to the inner surface of the cylinder and the blade, so the freezing process was stopped in a short time. In particular, in the case of cherry shrimp and peeled shrimp with a lot of surface moisture, even if the number of rotations and temperature were adjusted, they freeze and adhered to the inner surface of the cylinder and the blade immediately after the start of operation, and the rose could not be frozen. .

  In addition, as described above, the rotary cooling device of the present invention is optimal for the process of cooling and freezing peeled shrimp, cherry shrimp, shirasu, etc. with a large amount of moisture on the surface, but relatively large raw materials such as mackerel and mackerel In addition, the size of the processing chamber and the number of rotations of the cooling cylinder can be set as appropriate, and freezing can be performed in units of one by putting an appropriate amount of mackerel, horse mackerel, etc. into each processing chamber. Can also be used. Moreover, it is not limited to freezing treatment, for example, by using a high temperature rice after cooking, high temperature shirasu after cooking, sakura shrimp or the like as a raw material, a rice or white shirasu or the like is used for 20-40 It can also be used for a cooling process such as cooling to about ° C. Furthermore, the raw material can be charged into the cooling cylinder by using an appropriate means depending on the type of the raw material, for example, a conveyor or the like.

It is a schematic front view which shows the 1st example of a rotary cooling device of this invention. It is a schematic sectional side view similarly. It is a cross-sectional front view of the principal part. It is IV-IV sectional drawing of FIG. It is a cross-sectional side view explaining the movement state of the raw material in a process chamber. It is a perspective view explaining the movement state of the raw material in a process chamber. It is sectional drawing which shows one example of a cooling cylinder provided with six process chambers. It is sectional drawing which shows one example of the cooling cylinder which provided the four process chambers. It is sectional drawing which shows the other example of a cooling cylinder which provided the four process chambers. It is a schematic front view which shows the 2nd example of a rotary cooling device of this invention. It is a side view which shows an example of the conventional rotary cooling freezing apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Rotating drum, 12 ... Rotating cylinder, 13 ... Center cylinder, 14 ... Processing chamber, 15 ... Partition plate, 16 ... Raw material inlet, 17 ... Product outlet, 18 ... Cooling cylinder, 19 ... Heat insulating material, 21 ... Mount , 22 ... support member, 23 ... sprocket part, 24 ... drive motor, 25 ... drive chain, 26 ... inlet exhaust blower, 27 ... inlet exhaust duct, 28 ... outlet exhaust blower, 29 ... outlet exhaust duct 31 ... Raw material charging chute, 32 ... Product takeout chute, 33 ... Inside temperature indicator, 34 ... Inside temperature controller, 35 ... Coolant supply controller, 36 ... Revolution control mechanism, 37 ... Rotation power panel, 38 ... Mounting bracket, 51 ... Preliminary side cooling cylinder, 52 ... Product outlet, 53 ... Center cylinder, 53a ... Projection, 54 ... Rotating cylinder, 55 ... Partition plate, 61 ... Rear side cooling cylinder, 62 ... Product raw material input Mouth, 63 ... rotating cylinder, 64 ... central cylinder 65 ... partition plate, 66 ... product unloading opening, 71 ... guide member, 72 ... cylindrical part, 73 ... flange portion

Claims (7)

  A rotating cylinder having a rotating shaft in a horizontal direction, a center cylinder disposed at a rotating shaft portion of the rotating cylinder, and an inner surface of the rotating cylinder and an outer surface of the central cylinder connected to each other to connect the rotating cylinder and the center A plurality of radial partition plates that integrate a cylinder and partition an annular space formed between an inner surface of the rotating cylinder and an outer surface of the central cylinder into a plurality of circumferential processing chambers; A cooling cylinder having a raw material inlet provided at one end of the rotary cylinder and a product outlet provided at the other end, each of the raw materials charged into the raw material inlet being distributed into the processing chambers, respectively. A rotary cooling device for cooling and carrying out the cooled product from the product carry-out port, wherein the inner surface of the processing chamber is widened from the raw material inlet side toward the product carry-out side; A rotary cooling device characterized by that.   The rotary cooling device according to claim 1, wherein an inner surface of the rotary cylinder is a tapered surface that expands from the raw material inlet side toward the product carry-out port side.   The rotary cooling device according to claim 1 or 2, wherein an outer surface of the central cylinder is a tapered surface that decreases from the raw material inlet side toward the product outlet side. A plurality of the cooling cylinders are arranged in series from the raw material inlet side to the product outlet side, and a primary cooling product carried out from the product outlet of the cooling cylinder arranged on the raw material inlet side is arranged on the product outlet side. The rotary cooling device according to any one of claims 1 to 3, further comprising a guide member for feeding into a product raw material inlet of the cooled cylinder.   The angle of the tapered surface of the processing chamber in the cooling cylinder arranged on the raw material inlet side is formed larger than the angle of the tapered surface of the processing chamber in the cooling cylinder arranged on the product outlet side. Item 5. The rotary cooling device according to Item 4.   The number of processing chamber sections in the cooling cylinder disposed on the raw material inlet side is formed to be larger than the number of processing chamber sections in the cooling cylinder disposed on the product outlet side. The rotary cooling device as described.   The rotation speed of the cooling cylinder arrange | positioned at the said raw material inlet side is set faster than the rotation speed of the cooling cylinder arrange | positioned at the said product outlet side, The any one of Claim 4 thru | or 6 characterized by the above-mentioned. Rotary cooling system.

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