JP4420369B2 - Freezer for processed foods using steel belt freezer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for freezing processed foods using a steel belt freezer capable of rapidly freezing roses without losing the shape immediately after processing of raw processed soft processed foods that have not been heat-treated .
Here, raw processed foods that have not been heat-treated include processed fish products such as fried oysters and fried shrimp, hamburger, shumai, gyoza, spring rolls, high quality fish, shrimp, mini hamburger, pie , Including steak and confectionery.
[0002]
[Prior art]
For example, in the case of fried oysters, the soft frozen product is used in the process of shelling, draining after washing, rolling the bread, and then freezing the roses in a tray, and hamburger, shumai, gyoza, spring roll In this case, a process of filling the container after molding, and then cooling and freezing while filling the container is used, and in the case of Shumai and Gyoza, the process of filling the container after molding and then freezing by steaming while filling the container In the case of spring rolls, a process of filling the tray after molding and then freezing it as the tray is used.
[0003]
In any of the above cases, cooked and frozen products including processed soft fishery products should be protected before freezing to prevent damage to the shape of cooked products and the like during freezing and distribution, and to maintain the shape during molding prior to freezing. They are stored in trays and containers while maintaining the shape when they are molded, and are distributed as they are to frozen foods to the final store.
[0004]
Various freezing devices such as spiral conveyor type, tunnel type, contact type and liquid nitrogen type have been introduced as freezing devices for cooked frozen foods. The freezing process is expected to be incorporated into the manufacturing process such as quality improvement by freezing, productivity improvement, and labor saving.
[0005]
In other words, a spiral belt freezer is used for freezing oyster fries, and the bottom surface is used for freezing roses in IQF products of small luxury foods (high-quality fish, shrimp, mini hamburger, pie, steak meat, confectionery, etc.) Contact freezing with a steel belt cooled to about 40 ° C. is used.
[0006]
Among the frozen foods, processed fishery products such as fried oysters and fried shrimp are deshelled, drained after washing, and crumbed, then laid in a tray and frozen in a raw form. In order to minimize the physical and chemical effects on the tissues and ingredients of food, water in the food that has not been processed is frozen. Therefore, it is necessary to use a freezing method that reduces mechanical damage to the meat quality.
[0007]
[Problems to be solved by the invention]
By the way, the spiral freezer conventionally used for freezing the oyster fry is a unit that uses a mesh belt having a number of stages from 10 to a maximum of 24 to convey a product to be cooled spirally from the bottom to the top. In general, this type of freezing is performed by blowing cold air of 5-6 m / s from top to bottom, but in this system, fans, rollers, mesh conveyors, etc. Since the rotating and running parts are operating, the structure is complicated and there are management problems such as cleaning and maintenance.
[0008]
On the other hand, in the case of a steel belt freezer, the product to be frozen is frozen in the process of being transported by the steel belt, so that it can be treated hygienically and the steel belt can be easily cleaned and sterilized. When freezing oyster trays containing oysters on a belt with no gaps between them, there is a problem that the freezing time becomes long due to insufficient freezing capacity, or contact via a tray made of a member close to a heat insulating material on a freezing steel belt. Freezing has problems of low heat transfer rate and low cooling efficiency.
[0009]
The present invention has been made in view of the above-described problems, and enables quick freezing in which ice crystals generated during freezing are fine in a transport process while being stored in a tray, and also hygienically. The purpose of this invention is to provide a freezer for freezing processed foods of the impinging jet type using a steel belt that is excellent in terms of washing and sterilization.
[0010]
[Means for Solving the Problems]
Therefore, the present invention is a tray in which storage recesses for storing soft processed foods in a raw state that has not been heat-treated, and a steel belt for placing and transporting trays storing the processed foods in the storage recesses , A method for freezing processed food in a steel belt freezer comprising a cooling collision jet cooling section for freezing the conveyed product,
The cooling collision jet cooling section is provided above and below the steel belt, cooled by a separately provided cold heat source, blows out the jet vertically from the top and bottom to the steel belt, and forms a collision jet over the entire surface. Part and a lower frozen airflow blowing part,
On the other hand, the tray has storage recesses for storing the processed foods scattered on the tray, and a hole is provided between the recesses.
The jet flow blown from the upper frozen air flow blowing portion is passed through the hole opening portion of the tray, and the jet flow is guided between the tray lower surface side and the steel belt upper surface on which the tray is placed, and the jet flow is made into the hole Through the back surface of the storage recess adjacent to the opening, to give the processed food freeze and heat,
The collision jet flow given from the upper surface of the processed food material by the upper frozen air current blowing portion, the freezing cold heat given to the processed food material through the back surface of the storage recess, and the lower frozen air flow blowing portion given to the lower side of the steel belt It is characterized by rapid freezing by high-efficiency heat transfer combined with cold heat generated by impinging jets .
[0011]
The invention according to claim 1 is a method of physically giving to a structure and components of a frozen food material by forming fine ice crystals when freezing the raw processed food material that has not been heat-treated such as fried oysters, fried shrimp, etc. A freezer that enables quick freezing that can minimize chemical effects is provided.
[0012]
In other words, steel belts are used for the conveyor belt on which the food to be frozen is placed, and the lower and upper surfaces of the belt are cooled by a separately provided cooling source of about −40 ° C., and are vertically moved with respect to the steel belt. Further, a collision jet cooling portion that blows out a jet and forms a collision jet over the entire surface is arranged along the top and bottom of the steel belt.
The tray that is placed on the steel belt and stores and conveys the frozen food material is provided with storage recesses, and a notch-like opening is provided between the recesses, and the above-mentioned through the opening is provided from above. A jet to be blown is passed through to form a collision jet between the upper surface of the steel belt on which the tray is placed, a wall jet is formed by the jet, and freezing and cooling heat is applied to the food to be frozen through the back surface of the storage recess. The freezing by the impinging jet flow from the upper and lower surfaces of the steel plate and the cold by the impinging jet flow of −40 ° C. from the lower surface of the steel belt enable rapid freezing by high-efficiency heat transfer.
[0013]
In the case of the present invention, when cooling the food to be placed and conveyed on the steel belt, the cooling of the steel belt is performed without directly cooling the brine by the contact with the back surface of the steel belt as seen in the conventional steel belt freezer. Since a cooling system using a brineless impinging jet flow from above and below is used, improvement in maintenance, particularly improvement in cleaning properties can be expected.
[0014]
Further, in the perforated tray according to claim 1, the concave portions and the perforated portions are alternately arranged in a row in the same direction, and the perforated portions arranged in the row shape are formed with the perforated portion. The concave portions arranged adjacent to each other are arranged with their positions shifted in the column direction, and the arrangement positions of the concave portions and the perforated portions are arranged with a phase difference in the column direction. To do.
[0015]
The invention according to claim 2 shows an embodiment of the structure of the perforated tray for the food to be frozen.
[0016]
Further, the freezer according to claim 1 is formed in a tunnel shape, and the collision jet velocity at the freezer inlet side is made different from the collision jet velocity at the freezer downstream side.
[0017]
According to the third aspect of the present invention, the wind speed of the impinging jet to the food to be frozen is adjusted to provide an appropriate pre-cooling zone, and then the system is shifted to quick freezing.
[0018]
Further, the collision jet in the pre-cooling zone immediately after the introduction of the foodstuff on the freezer entrance side according to claim 3 has a wind speed of about 5 to 8 m / s, and the collision jet after the pre-cooling zone has a wind speed of about 20 m / s. It is characterized by.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention unless otherwise specified. Absent.
1 is a diagram showing a schematic configuration of a freezer for freezing oyster fly according to the present invention, FIG. 2 is a sectional view showing a configuration of an impinging jet cooling section provided along the steel belt of FIG. 1, and FIG. It is a schematic diagram which shows the condition of the wall surface jet formation which cools a tray lower surface by 2 collision jets. 4A and 4B are diagrams showing a schematic configuration of the perforated tray shown in FIG. 2, in which FIG. 4A shows a perspective view seen from above, and FIG. 4B shows a perspective view seen from below.
[0020]
As shown in FIG. 1, a tunnel-type outer structure 21 made of a heat insulating member and a perforated tray in which the inside of the structure travels vertically in the direction of arrow A and houses a oyster-fried workpiece 10 from the entrance 21 a side. 15 is a steel belt 11 which is carried out in a frozen state together with the tray from the outlet side 21b, the perforated tray 15, a work placing surface on the upper side of the steel belt 11, and a belt opposite to the placing surface. A plurality of impinging jet cooling units 20, 20, 20 for vertically blowing a low-temperature high-speed jet of about −40 ° C. over the entire lower surface are configured.
In addition, the belt washing device 22 is provided in the reverse traveling path on the lower side of the steel belt entrance 21a side, and the processed food product, which is the object to be frozen, can be placed on a clean steel belt and frozen in a sanitary environment. It is like that.
[0021]
2 is a cross-sectional view showing the configuration of the collision jet cooling section 20 provided along the steel belt 11 of FIG. 1, and FIG. 3 shows the collision jet 13c of FIG. A situation is shown in which a wall surface jet 13d that passes through and cools the back surface 15c of the storage recess 15a is formed.
[0022]
As shown in FIG. 2, the impinging jet cooling unit 20 is
A number of upper slit nozzles 12a, 12a,..., 12a and lower slit nozzles 12b, 12b,..., 12a provided on the upper and lower sides of the steel belt 11 and perpendicular to the traveling direction of the steel belt. , 12b, respectively, and an upper frozen airflow blowing portion 16b and a lower frozen airflow blowing portion 16b.
The upper frozen airflow blowing portions 16a, 16a, 16a are configured to be movable up and down, and the height of the upper slit nozzles 12a, 12a,. Even if the distance changes, the distance to the freezing surface is configured to be substantially constant to increase the predetermined cooling efficiency.
In other words, the position of the upper side freezing air blowing portion 16a in the vertical direction can be changed so as to correspond to the thickness of the conveyed product on the steel belt.
[0023]
The plurality of slit nozzles 12a, 12a,..., 12a arranged on the upper side of the steel belt 11 correspond to the height of the freezing surface of the object to be cooled, corresponding to the upper freezing air blowing portions 16a, 16a. The height position of 16a is changed, for example, in the case of oyster fly freezing in a state of being stored in a tray, or corresponding to the height of each frozen object at the time of freezing of roses.
[0024]
The frozen air flow blowing portions 16a and 16b receive cold supply from a cold heat source (not shown) provided outside the outer structure 21 shown in FIG. 1, and a high-speed jet of about −40 ° C. is sent from the slit nozzles 12a and 12b. A collision jet is formed on the blowout, the workpiece 10 and the steel belt 11 on which the workpiece 10 is placed, and the workpiece is rapidly frozen to minimize physical and chemical influences by forming fine ice crystals.
[0025]
The perforated tray 15 has a plurality of rows for accommodating the workpieces 10 indicated by two-dot chain lines as seen in a perspective view seen from above shown in (A) of FIG. 4 and a perspective view seen from below shown in (B). It is comprised from the workpiece | work storage recessed part 15a arrange | positioned in several rows, and the perforated part 15b arrange | positioned by providing the phase difference in a row | line | column between the multiple rows | lines workpiece storage recessed parts 15a.
When the workpiece 10 is frozen, a plurality of trays 15 storing the workpieces 10 in the workpiece storage recesses 15a are placed on the steel belt 11 in close contact with each other. As shown in FIG. A collision jet 13c is formed with the steel belt 11 on which the tray on the lower surface of the tray is placed via the portion 15b, and the back surface 15c of the workpiece storage recess 15a of the perforated tray 15 is formed downstream of the collision jet 13c. A wall jet 13d is formed on the surface.
[0026]
The wall surface jet 13d shown in FIG. 3 can cool the workpiece 10 from the back surface 15c of the workpiece storage recess 15a in which the workpiece 10 is stored, and the heat transfer of the cold heat by the collision jet 13b from the lower surface of the steel belt 11 Combined with the direct spraying of the impinging jet 13a on the surface, freezing heat is applied from the entire surface of the workpiece to enable efficient rapid freezing.
[0027]
Moreover, the difference between the velocity of the high velocity jet blown to the upper part of the steel belt 11 of the collision jet cooling section 20 provided along the steel belt 11 between the collision jet velocity on the inlet 21a side and the collision jet velocity on the downstream side. For example, the impinging jet in the precooling zone immediately after the work on the entrance 21a side is set to a wind speed of about 5 to 8 m / s, and the impinging jet after the precooling zone is set to a wind speed of about 20 m / s, and the precooling period is set for freezing. It is intended to be provided.
[0028]
By using the perforated tray 15, the freezing time is 23 minutes in the case of the conventional steel belt type freezer, whereas in the case of using the standard tray (no hole) and perforated tray in the collision jet type steel belt freezer of the present invention. The test results for 19 minutes and 17 minutes were obtained, respectively, and when using the perforated tray, a shortening of 5 minutes or more was expected, and freezing was possible for a short time.
Further, in the case of the perforated tray, since the cooling heat is uniformly applied from the entire surface of the workpiece, the quality can be improved.
[0029]
It goes without saying that the freezer for freezing oysters described in FIG. 1 can be applied to other processed foods such as fried shrimp, as well as small luxury foods (high quality fish, shrimp, mini hamburger, pie, steak meat, confectionery, etc. ) IQF products can be applied to freezing roses, and the efficiency can be improved.
[0030]
【The invention's effect】
With the above configuration, the IQF and the oyster frying freezer can be used together, and the use of the perforated tray enables uniform freezing over almost the entire surface of the workpiece, thereby obtaining a high-quality frozen food.
By using a steel belt type freezer, cleaning of the belt and maintenance of each part can be performed in a hygienic and stable manner as compared with the spiral freezer.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of a freezer for freezing oyster fly according to the present invention.
2 is a cross-sectional view showing a configuration of an impinging jet cooling section provided along the steel belt of FIG. 1. FIG.
FIG. 3 is a schematic diagram showing a state of formation of a wall surface jet that cools the lower surface of the tray by the collision jet of FIG. 2;
4A and 4B are diagrams showing a schematic configuration of the perforated tray shown in FIG. 2, in which FIG. 4A shows a perspective view seen from above, and FIG. 4B shows a perspective view seen from below.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Work 11 Steel belt 12a, 12b Slit nozzle 13a, 13b, 13c Collision jet 13d Wall surface jet 15 Hole opening tray 15a Work storage recessed part 15b Hole opening 16a, 16b Freezing air blowing part 20 Collision jet cooling part 21 Outer structure 22 Belt Cleaning device

Claims (4)

A tray in which storage recesses for storing soft processed foods in a raw state that are not heat-treated are scattered, a steel belt for placing and transporting the trays storing the processed foods in the storage recesses, and freezing the transported items A freezing device for processed foods using a steel belt freezer comprising a cooling collision jet cooling section ,
The cooling collision jet cooling section is provided above and below the steel belt, cooled by a separately provided cold heat source, blows out the jet vertically from the top and bottom to the steel belt, and forms a collision jet over the entire surface. Part and a lower frozen airflow blowing part,
On the other hand, the tray has storage recesses for storing the processed foods scattered on the tray, and a hole is provided between the recesses.
The jet flow blown from the upper frozen air flow blowing portion is passed through the hole opening portion of the tray, and the jet flow is guided between the tray lower surface side and the steel belt upper surface on which the tray is placed, and the jet flow is made into the hole Through the back surface of the storage recess adjacent to the opening, to give the processed food freeze and heat,
The collision jet flow given from the upper surface of the processed food material by the upper frozen air current blowing portion, the freezing cold heat given to the processed food material through the back surface of the storage recess, and the lower frozen air flow blowing portion given to the lower side of the steel belt A freezing device for processed foods using a steel belt freezer , which enables rapid freezing by high-efficiency heat transfer combined with cold heat generated by an impinging jet . The recesses and the perforations are alternately arranged in a row in the same direction, and the perforations arranged in the row are arranged in a row with respect to the recesses arranged adjacent to the perforations. 2. The processing using the steel belt freezer according to claim 1 , wherein the positions of the recesses and the holes are arranged with a phase difference in the row direction. Ingredient freezing equipment . Thereby forming the freezer like a tunnel, the collision jet speed in the freezer inlet side, of the processed food material with a steel belt freezer according to claim 1, characterized in that differentiated the collision jet speed in the freezer downstream freezing Equipment . The impinging jet in the precooling zone immediately after the introduction of the food on the freezer entrance side has a wind speed of about 5 to 8 m / s, and the impinging jet after the precooling zone has a wind speed of about 20 m / s. Processed food freezing device using the steel belt freezer as described.

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