JP2004081041A - Method and apparatus for producing heat-treated egg with eggshell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To produce heat-treated eggs with eggshell excellently heat-treated in a short time. <P>SOLUTION: A plurality of raw eggs placed on a heat-resistant tray are transported in a fixed direction by a carrying belt 21. The raw eggs transported in the fixed direction are heat-treated by condensation latent heat of high-temperature water vapor in a heat treatment part 11 to give heated eggs. A carrying belt body 31 is arranged at the subsequent stage of the carrying belt 21 and transports the heat-resistant tray on which the heated eggs are placed in the fixed direction. In a cooling part 12, the heated eggs transported in the fixed direction are sprayed with a cold air jet stream and cooled. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a shell-added heat-treated egg (that is, boiled egg-like) and a manufacturing apparatus therefor, and in particular, a manufacturing method for manufacturing a shell-added heat-treated egg that has been heat-treated in a short time and well, It relates to the device.
[0002]
[Prior art]
In general, when manufacturing a shell-added heat-treated egg, hot water (heated water) is used for the heat treatment, and cooling water is used as cooling water, such as well water, in the cooling treatment, and the cooling water is used as a shower for the eggs after heat treatment. Cooled by bathing or immersing eggs after heat treatment in a cooling water tank.
[0003]
For example, in the method for producing a shell-added heat-treated egg described in JP-A-11-290029, a plurality of raw eggs are arranged on an egg tray, the egg trays are stacked without contacting each other, and stored in a container. Fill in a retort that can be pressurized and hot showered. Thereafter, pressure gas is fed into the retort, hot water is supplied from the hot water spray tube, and hot water is also supplied from the hot water shower tube. And the heat-treated egg is returned to normal temperature.
[0004]
[Problems to be solved by the invention]
However, when a raw egg is heat-treated using a warm water shower or the like as in the prior art, moisture is absorbed into the egg and often becomes watery when eaten. Furthermore, when cooling, in order to make it easy to peel off the eggshell, as described above, due to the rapid cooling using a cooling water shower or a cooling water tank, moisture enters the egg even during cooling. Therefore, there is a problem that the taste is lowered.
[0005]
Furthermore, in the conventional example, after arranging the eggs in the egg tray, the egg trays are stacked and stored in the container, and the heat treatment is performed. In other words, since the egg trays are stacked, all the eggs are evenly distributed. It may be difficult to heat-treat. In addition, after the heat treatment, it is necessary to take out the egg tray from the container and perform the cooling treatment, and there is a problem that the work process takes time.
[0006]
An object of the present invention is to heat and cool a shell-added heat-treated egg that has been heat-treated in a short time and well, that is, when the shell-added heat-treated egg is heated and cooled, it can be heated and It is an object of the present invention to provide a method for manufacturing a shell-added heat-treated egg that can be cooled and a manufacturing apparatus therefor.
[0007]
[Means for Solving the Problems]
According to the present invention, in the manufacturing method for producing a shell-added heat-treated egg by heat-treating the raw egg and then cooling it, the raw egg is heated by the condensation latent heat of high-temperature steam while transporting the raw egg in a predetermined direction. -Heat treatment step for sterilization to make a heated egg; and cooling to make the shell-added heat-treated egg by blowing a cool air jet to the heated egg while transporting the heated egg in the predetermined direction A method for producing a shell-added heat-treated egg.
[0008]
In this way, after transporting the raw egg in a predetermined direction and heating / sterilizing the raw egg with the latent heat of condensation of high-temperature steam, the heated egg is transported in the predetermined direction while cooling the heated egg Since a jet is blown and cooled to obtain a shell-added heat-treated egg, a large amount of eggs can be cooled by heating and sterilizing well in a short time.
[0009]
For example, in the heat treatment step, the raw eggs are heated and sterilized at a predetermined time of 60 ° C. to 99 ° C., and in the cooling treatment step, the temperature of the cold air jet is set to 12.0 ° C. to 0.1 ° C. Set to.
[0010]
According to the present invention, in a manufacturing apparatus for manufacturing a shell-added heat-treated egg by heat-treating a raw egg and then cooling it, the first transport means for transporting the raw egg in a predetermined direction, and the first transport means Heat treatment means for heating and sterilizing the raw egg conveyed by the latent heat of condensation of high-temperature steam to form a heated egg, and the heated egg disposed at a stage subsequent to the first conveyance means in the predetermined direction And a cooling means for cooling the heated egg conveyed by the second conveying means by blowing a cold air jet onto the heated egg to form the shell-added heat-treated egg. A device for producing a shell-added heat-treated egg is obtained.
[0011]
For example, the heat treatment means is arranged so as to store the first conveying means along the first conveying means, and the first inlet portion into which the raw eggs are carried and the heated eggs are carried out. A heat treatment housing formed with a first outlet portion, and a steam generation means that is disposed below the first transport means and generates high-temperature steam, the first transport means includes: The belt-shaped body is driven in the predetermined direction, and a part of the belt-shaped body is positioned vertically above the position where the first inlet portion and the first outlet portion are formed. The raw eggs on the belt-like body are wrapped with the steam generated by the steam generating means. Thus, if a heating and sterilization process is performed, a raw egg can be heated and sterilized uniformly.
[0012]
The steam generating means is disposed below the belt-like body and is disposed at a predetermined interval in the predetermined direction, and steam means for ejecting the high-temperature steam downward in the vertical direction; A shielding member disposed on the lower side of the steam means, and the upper surface of the heat treatment casing and the belt-like body are formed by steam rising as a result of applying the steam ejected from the steam means to the shielding member. A steam stagnation is formed therebetween, and the raw egg is wrapped with the steam stagnation. In this way, if the steam rises, the raw eggs can be easily wrapped in steam.
[0013]
Note that a plurality of heating zones may be defined in the heat treatment casing along the predetermined direction, and the temperature of the plurality of heating zones may be controlled for each heating zone. In this way, the temperature can be controlled for each heating zone. As a result, for example, the egg heating temperature can be gradually lowered along a predetermined direction, and the water separation rate after cooling can be improved. Can control the hardness of egg whites and yolks inside shelled eggs. Here, the water separation rate is represented by water separation rate (%) = (water separation water amount / total weight of eggs with shells) × 100, but the water separation rate is 1 to 2 compared to the batch type by the manufacturing method according to the present invention. A 3% decrease was confirmed.
[0014]
In the present invention, the cooling processing means is arranged so as to accommodate the second transport means along the second transport means, and the second inlet portion into which the heated egg is carried and the shell additional heat treatment A transport path housing formed with a second outlet portion from which the egg is transported, and an injection means for injecting the cold air jet toward the heated egg on the second transport means The spraying means is, for example, a slit formed in the transport path housing, and sprays the cold air jet onto the heated egg from the slit. In this way, if a jet of cold air is jetted toward the heated egg to cool the heated egg, the heated egg can be cooled efficiently and a slit is formed in the transport path housing Then, if the cold air jet is formed by the slit and the cold air jet is sprayed on the heated egg, the cold air jet can be easily formed.
[0015]
The jetting unit may be a pair of slits arranged opposite to each other with the second transport unit interposed therebetween, and the cold air jet may be blown from the pair of slits toward the heated egg.
[0016]
Note that, for example, a plurality of the raw eggs are placed on a heat-resistant tray and conveyed in the predetermined direction by the first conveying means. In this way, if you place multiple raw eggs on a heat-resistant tray, transport the heat-resistant tray in a predetermined direction, and heat, sterilize, and cool it, you can easily process a large amount of eggs at once. can do.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the drawings. It should be noted that the dimensions, materials, shapes, relative arrangements, and the like of the components in the illustrated example are merely illustrative examples and not intended to limit the scope of the present invention unless otherwise specified.
[0018]
First, with reference to FIG. 1, the manufacturing apparatus used for the manufacturing method of the shell addition heat treatment egg by this invention is demonstrated. The illustrated shell-added heat-treated egg production apparatus includes a heat treatment unit 11 and a cooling treatment unit 12, and the heat treatment unit 11 is positioned in front of the cooling treatment unit 12. The heat treatment unit 11 has a heat treatment housing 11a extending in the left and right directions in the figure, and an inlet portion 11b is formed at the left end of the heat treatment housing 11a, and an outlet portion 11c is formed at the right end. A conveyor belt body 21 that is conveyed in the direction indicated by the solid line arrow in the drawing is disposed in the heat treatment casing 11a, and the conveyor belt body 21 has a plurality of holes. As will be described later, a tray (not shown) on which eggs (not shown) are loaded is conveyed on the conveying belt body 21.
[0019]
In the illustrated example, a partition plate (partition wall) 11e having a passage hole 11d is formed in the middle of the heat treatment casing 11a, whereby the inside of the heat treatment casing 11a is located on the left side. It is divided into one heating zone 11f and a second heating zone 11g located on the right side. It is not always necessary to divide the first and second heating zones 11f and 11g, that is, a plurality of heating zones, as shown in the figure. The heating temperature may be varied to control the temperature for each heating zone. For example, if the heating temperature in the second heating zone 11g is lower than the heating temperature in the first heating zone 11f, the egg temperature gradually decreases during the heating, so that the water separation rate becomes good and the shell Not only can the egg white and egg yolk hardness in the attached egg be controlled, but also the shell separation is improved.
[0020]
In FIG. 1, the conveyor belt body 21 is arranged so as to be gradually inclined upward from the inlet portion 11 b, and then flattened (flat portion), and the first heating zone 11 f ends. Immediately before, it is gradually inclined downward and passes through the passage hole 11d. Similarly, when the transport belt body 21 passes through the passage hole 11d, the transport belt body 21 is disposed so as to be gradually inclined upward, and thereafter, is flattened, and further gradually just before the end of the second heating zone 11g. It is inclined downward and passes through the outlet portion 11c. That is, a part of the conveyor belt 21 is positioned vertically above the position where the inlet portion 11b and the outlet portion 11c are formed.
[0021]
Although not shown in FIG. 1, protrusions 11h (see FIG. 3) are formed on the surface of the conveyor belt body 21 at a predetermined interval (for example, the length of the tray). The protrusions 11h Prevents the tray from shifting.
[0022]
Further, as shown in FIG. 1, in the heat treatment casing 11 a, the first and second heating zones 11 f and 11 g have a predetermined interval in the transport direction of the transport belt body 21 at intervals of the transport belt body 21. Corresponding to the flat part (part arranged flat), a steam pipe 22 extending from the back side of the paper surface in the drawing to the front side is disposed, and a steam (steam) outlet (downward) facing this steam pipe 22 ( (Not shown) is formed. A mountain-shaped shielding plate (a pair of members extending obliquely downward from the apex) 23 is disposed below the steam pipe 22, and the shielding plate 23 extends in the direction in which the steam pipe extends. .
[0023]
As described above, the cooling processing unit 12 is arranged at the subsequent stage of the heating processing unit 11, and this cooling processing unit 12 has the cooling processing case 12a extending in the left and right direction in the figure. An inlet portion 12b is formed at the left end, and an outlet portion 12c is formed at the right end. A conveyor belt body 31 that is transported in the direction indicated by the solid line arrow in the figure is disposed in the cooling processing casing 12a, and a tray that has passed through the heat treatment section 11 is disposed on the conveyor belt body 31 at the inlet section 12b. Passed through. And the egg on a tray is conveyed in the direction of the exit part 12c, cooling. Although not shown, the outlet portion 11c and the inlet portion 12b are connected by a duct or the like.
[0024]
Now, it is assumed that a pair of the conveyor belt bodies 21 and 31 is disposed. That is, it is assumed that the pair of transport belt bodies 21 are arranged in parallel to each other in the transport direction, and the pair of transport belt bodies 31 are disposed corresponding to the transport belt bodies 21. In other words, two lanes are provided for conveying the tray.
[0025]
Referring to FIG. 2, here, the pair of transport belt bodies are indicated by reference numerals 31a and 31b, respectively. In the cooling processing casing 12a, cooling devices 41a and 41b are arranged corresponding to the conveyor belt bodies 31a and 31b, respectively, and blowers (fans) 42a and 42b are provided below the cooling devices 41a and 41b. Is arranged.
[0026]
The conveyor belt bodies 31a and 31b are respectively housed in the conveyance path housing portions 43a and 43b, and the upper and lower surfaces of the conveyance path housing portions 43a and 43b are respectively shown in FIG. A plurality of upper slits 44a and lower slits 44b are formed along the conveying direction of the conveying belt bodies 31a and 31b, respectively. Further, exhaust ports 45a and 45b are formed on the side surfaces of the transport path housing portions 43a and 43b, respectively.
[0027]
Now, when the fans 42a and 42b are driven, the air cooled by the cooling devices 41a and 41b is circulated by the fans 42a and 42b as shown by thick arrows in FIG. Cold air is ejected from the lower slit 44b into the transport path housing portions 43a and 43b, the eggs on the tray are cooled, exhausted from the exhaust ports 45a and 45b, and returned to the cooling devices 41a and 41b.
[0028]
Here, referring to FIG. 1 again, when a raw egg is heat-treated to form a shell-added heat-treated egg, the raw egg is raw on a heat-resistant tray (for example, polyethylene, polypropylene, or a material having heat resistance at 100 ° C.). Eggs are arranged, the heat-resistant tray is fed from the inlet 11b of the heat treatment unit 11, and the heat-resistant tray is conveyed by the conveying belt body 21 in the direction of the solid line arrow. It is desirable to form a plurality of holes in the heat resistant tray.
[0029]
In the first heating zone 11f, steam (water vapor) is sent to the steam pipe 22 at a slight pressure, and the steam is ejected downward from the steam ejection port. At this time, the heating temperature is set to 60 to 99 ° C. As described above, since the mountain-shaped shielding plate 23 is disposed on the lower side of the steam pipe 22, the water vapor ejected from the steam outlet hits the shielding plate 23 and rises upward as shown in FIG. I will go up. A steam stagnation 62 is generated in the vicinity of the conveyor belt body 21.
[0030]
As described above, a part of the conveyor belt body 21 is positioned vertically above the position where the inlet portion 11b and the outlet portion 11c are formed, so this portion (flat portion) is formed on the heat treatment casing 11a. The distance from the upper surface (ceiling) is narrow. As a result, the water vapor rising from the shielding plate 23 is accumulated between the conveying belt body 21 and the ceiling of the heat treatment casing 11a, and becomes a steam stagnation 62 (a heat-resistant tray is not shown in FIG. 3). .
[0031]
That is, as shown in FIG. 3, the flat portion of the conveyor belt body 21 corresponding to the position where the steam pipe 22 is disposed is higher than the inlet portion 11b and the outlet portion 11c. The steam stagnate near the flat portion, and steam stagnation 62 is generated. The raw eggs 61 on the heat-resistant tray are heated and sterilized (hereinafter simply referred to as “heating”) by the steam stagnation 62, that is, by the latent heat of condensation of the steam. The heat-resistant tray that has passed through the first heating zone 11f proceeds to the second heating zone 11g. At this time, the transport belt body 21 once falls to the height of the inlet 11b and passes through a zone for switching the temperature zone.
[0032]
Also in the 2nd heating zone 11g, a vapor | steam (water vapor | steam) is sent to the steam pipe 22 at a normal pressure, and a vapor | steam is ejected toward a lower side from a steam jet nozzle. In the same manner as the first heating zone 11f, steam stagnation is generated and the eggs are heated. In the second heating zone 11g, the heating temperature can be individually controlled.
[0033]
As described above, the heat-treated egg is transferred from the heat processing unit 11 to the cooling processing unit 12. As described above, in the cooling processing unit 12, the cooling devices 41a and 41b are driven, and the fans 42a and 42b are driven to feed the cold air from the upper slit 44a and the lower slit 44b to the transport path housing units 43a and 43b. . At this time, the cool air is set to 12 ° C. or less (preferably, the cool air temperature is set to 12.0 ° C. to 0.1 ° C.).
[0034]
Here, referring to FIG. 4, only the transport path housing portion 43 a is shown here. When cold air is sent from the upper slit 44a and the lower slit 44b, the cold air passage is narrowed as a result, and the cold air is sent as a jet from the upper slit 44a and the lower slit 44b to the conveyance path housing portion 43a. Will be. The jet flow sent from the upper slit 44 a is divided into left and right from the position where it hits the egg 61, and flows along the upper side surface of the egg 61.
[0035]
Similarly, the jet flow sent from the lower slit 44 b is divided into left and right from the position where it hits the egg 61, and flows along the lower surface of the egg 61. These jets are discharged from the discharge ports 45a and 45b (see FIG. 2).
[0036]
That is, as shown in FIG. 4, the egg 61 is encased in a jet, and the egg 61 can be effectively cooled (hereinafter, such a cooling effect will be referred to as the Coanda effect). . And the egg 61 cooled by the cooling process part 12 is carried out from the exit part 11c. For example, when the inside of the cooling processing unit 12 is + 5 ° C. and the egg surface temperature when the egg is transferred from the heating processing unit 11 to the cooling processing unit 12 is 80 ° C., for example, when cooling is performed for 25 minutes, The egg carried out from the processing unit 12 is 10 ° C. or lower.
[0037]
Here, the shell-added heat-treated eggs were actually manufactured using the shell-added heat-treated egg manufacturing apparatus shown in FIG. Here, it is assumed that a path for transporting the tray is provided with two lanes (lines), one line being an A line and the other line being a B line. The result is shown in FIG. In measurement 1 (A line), the heating temperature in the heat treatment unit 11 was set to 75 to 80 ° C. in the first half and 65 to 70 ° C. in the second half, and the heating time was set to 21 minutes. Moreover, the internal temperature in the cooling process part 12 was 5-7 degreeC, and cooling time was 24 minutes. In measurement 2 (B line), the heating temperature in the heat treatment unit 11 was set to 75 to 80 ° C. in the first half and 65 to 70 ° C. in the second half, and the heating time was set to 21 minutes. Moreover, the internal temperature in the cooling process part 12 was 5-7 degreeC, and cooling time was 24 minutes. In measurement 3 (A line), the heating temperature in the heat treatment unit 11 was set to 75 to 80 ° C. in the first half and 65 to 70 ° C. in the second half, and the heating time was set to 17 minutes. Moreover, the internal temperature in the cooling process part 12 was 5-7 degreeC, and cooling time was 24 minutes. In measurement 4 (B line), the heating temperature in the heat treatment unit 11 was set to 75 to 80 ° C. in the first half and 65 to 70 ° C. in the second half, and the heating time was set to 17 minutes. Moreover, the internal temperature in the cooling process part 12 was 5-7 degreeC, and cooling time was 24 minutes.
[0038]
In measurement 1 (A line), a test was performed using eggs having a core temperature of 22 ° C. before heating. The heat treatment increased the core temperature of the product (egg) from 22 ° C. to 68 ° C., and it took 7 minutes until the core temperature reached 60 ° C. If sterilization is performed after the core temperature reaches 60 ° C., the sterilization time is 14 minutes.
[0039]
Thus, when the heat-treated product was cooled by the cooling processing unit 12, the core temperature of the egg before being carried into the heat processing unit 12 was 68 ° C, and the core temperature was changed from 68 ° C to 8 ° C by the cooling processing. It decreased to ° C. The time required for the core temperature to drop to 10 ° C. was 23 minutes. Then, when the shell-added heat-treated egg obtained in measurement 1 (A line) was broken and observed, the shell could be easily peeled off, and there was no abnormality in appearance, and the taste was also watery. There was no.
[0040]
Similarly, in the measurement 2 (B line), the test was performed using eggs having a core temperature of 22 ° C. before heating. By the heat treatment, the core temperature of the product (egg) rose from 22 ° C. to 67 ° C., and it took 7 minutes until the core temperature reached 60 ° C., and the sterilization time was 14 minutes. The core temperature of the egg before carrying in to the heat processing part 12 was 67 degreeC, and the core temperature fell from 67 degreeC to 9 degreeC by the cooling process. The time required for the core temperature to drop to 10 ° C. was 23 minutes. Then, when the shell-added heat-treated egg obtained in Measurement 2 (B line) was broken and observed, the shell could be easily peeled off, and there was no abnormality in appearance, and the taste was also watery. There was no.
[0041]
Moreover, in the measurement 3 (A line), it tested using the egg whose core temperature before a heating is 21 degreeC. By the heat treatment, the core temperature of the product (egg) rose from 21 ° C. to 67 ° C., and it took 8 minutes until the core temperature reached 60 ° C., and the sterilization time was 9 minutes. The core temperature of the egg before carrying in to the heat processing part 12 was 67 degreeC, and the core temperature fell from 67 degreeC to 9 degreeC by the cooling process. The time required for the core temperature to drop to 10 ° C. was 23 minutes. Then, when the shell-added heat-treated egg obtained in Measurement 3 (A line) was broken and observed, the shell could be easily peeled off, and there was no abnormality in appearance, and the taste was also watery. There was no. Furthermore, in the measurement 4 (B line), it tested using the egg whose core temperature before a heating is 21 degreeC. By the heat treatment, the core temperature of the product (egg) rose from 21 ° C. to 67 ° C., and it took 8 minutes until the core temperature reached 60 ° C., and the sterilization time was 9 minutes. The core temperature of the egg before carrying in to the heat processing part 12 was 67 degreeC, and the core temperature fell from 67 degreeC to 9 degreeC by the cooling process. The time required for the core temperature to drop to 10 ° C. was 23 minutes. Then, when the shell-added heat-treated egg obtained in measurement 4 (B line) was broken and observed, the shell could be easily peeled off, and there was no abnormality in appearance, and the taste was also watery. There was no.
[0042]
According to the experiments by the inventors, it has been found that if the heating temperature is 60 ° C. to 99 ° C. and the temperature of the cold air jet is 12.0 ° C. to 0.1 ° C., a shell-added heat-treated egg can be produced satisfactorily. . And it turned out that it is good to make heating time 30 minutes-10 minutes, heating temperature 70 degreeC-80 degreeC, cooling time 30 minutes-20 minutes, and preferably the temperature of a cold-air jet 5 degreeC-10 degreeC.
[0043]
Next, when heating with warm water, heating with far infrared rays, and heating with the heat treatment unit shown in FIG. 1 are compared, heating with warm water makes the warm water flow rate in the warm water tank and the egg surface non-uniform, resulting in uneven heating. I found it easy to do. In addition, in the heating by far infrared rays, only the location where the far infrared rays hit is higher than the other locations, that is, it is difficult to irradiate the far infrared rays uniformly on the egg. The eggshell may become bald (the egg needs to be rotated to prevent this condition).
[0044]
On the other hand, when the heat treatment unit shown in FIG. 1 is used, the whole egg is uniformly heated by steam stagnation, so that the quality of the shell-added heat-treated egg can be made uniform, resulting in a decrease in yield due to defective heating. It never happened. And there was almost no moisture mixing into the egg.
[0045]
As described above, since the raw egg is heated using steam (water vapor) in the manufacturing apparatus shown in FIG. 1, the heated egg has a “dry feeling” finish and is watery. Disappears. Furthermore, the heating time can be greatly shortened.
[0046]
Furthermore, since the raw eggs are heat-treated by steam massaging, the amount of steam used can be reduced, and heating and sterilization can be performed simultaneously. Also, since the heated egg is cooled by a cold air jet during cooling, it is extremely hygienic. As described above, when a cold air jet is blown onto the egg using a slit, the Coanda effect is effective. Thus, the heated egg can be cooled, and the cooling processing time can be shortened.
[0047]
By the way, in the example shown in FIG. 4, although the example which sprays a cold jet from the upper slit 44a and the lower slit 44b was demonstrated, as shown in FIG. 6, only the upper slit 44a is provided and it is opposite to the upper slit 44a You may make it provide the exhaust port 45a in the position of the side.
[0048]
Also in this case, the cold jet flow ejected from the upper slit 44a to the transport path housing portion 43a moves along the surface of the product (egg) 61 and is discharged from the exhaust port 45a located on the opposite side of the upper slit 44a. Thus, the Coanda effect described with reference to FIG. 4 is obtained, and the egg 61 can be effectively cooled.
[0049]
【The invention's effect】
As described above, in the present invention, while transporting raw eggs in a predetermined direction, while heating and sterilizing raw eggs by condensation latent heat of high-temperature steam, while transporting heated eggs in a predetermined direction, Since a cold air jet is blown onto the heated egg to cool it to form a shell-added heat-treated egg, there is an effect that a large amount of eggs can be cooled by heating and sterilizing well in a short time.
[0050]
In the present invention, the first conveying means is a belt-like body that is driven in a predetermined direction, and the belt-like body is positioned vertically above the position where the inlet and outlet portions of the heat treatment casing are formed. Since the flat part is provided and the raw egg is wrapped in the flat part by steam massaging, there is an effect that the raw egg can be uniformly heated and sterilized.
[0051]
In the present invention, high-temperature steam is jetted vertically downward on the lower side of the belt-like body corresponding to the flat portion of the belt-like body, and the jetted steam is applied to the shielding member to form steam stagnation by the rising steam. Since the raw eggs are encased with steam stagnation, there is an effect that the raw eggs can be easily encased with steam.
[0052]
In the present invention, a plurality of heating zones are defined along a predetermined direction, and the temperature of the plurality of heating zones is controlled for each heating zone, so the egg heating temperature is individually controlled by the plurality of heating zones. As a result, it is possible to improve the water separation rate after cooling, and to improve the shell separation of the shelled eggs.
[0053]
In the present invention, since the cold air jet is jetted toward the heated egg to cool the heated egg, there is an effect that the heated egg can be efficiently cooled.
[0054]
In the present invention, a slit is formed in the transport path housing, a cold air jet is formed by the slit, and the cold air jet is sprayed on the heated egg, so that the effect of easily forming the cold air jet can be achieved. is there.
[0055]
In the present invention, a plurality of raw eggs are placed on a heat-resistant tray, and the heat-resistant tray is transported in a predetermined direction to be heated, sterilized, and cooled. There is an effect that can be done.
[Brief description of the drawings]
FIG. 1 is a view showing an example of a shell-added heat-treated egg manufacturing apparatus according to the present invention.
FIG. 2 is a diagram showing in detail a configuration of a cooling processing unit shown in FIG.
FIG. 3 is a diagram for explaining a heat treatment in a heat treatment unit shown in FIG. 1;
4 is a diagram for explaining an example of a cooling process in a cooling processing unit shown in FIG. 2; FIG.
FIG. 5 is a diagram showing the results of heating / cooling the eggs using the manufacturing apparatus shown in FIG. 1;
6 is a diagram for explaining another example of the cooling process in the cooling processing unit shown in FIG. 2; FIG.
[Explanation of symbols]
11 Heat processing section
12 Cooling processing section
11a Heat treatment case
11b, 12b entrance
11c, 12c outlet
11d passage hole
11e Partition plate (partition wall)
11f 1st heating zone
11g Second heating zone
12a Cooling case
21, 31 Conveyor belt body
22 Steam pipe
23 Shield plate
62 Steam (steam)

Claims (10)

In the production method of producing a shell-added heat-treated egg by heating and then cooling the raw egg,
A heat treatment step of heating and sterilizing the raw egg by condensing latent heat of high-temperature steam to convey the raw egg in a predetermined direction to a heated egg;
And a cooling step of cooling the heated egg by blowing a cold air jet onto the heated egg while transporting the heated egg in the predetermined direction. Production method. In the heat treatment step, the raw eggs are heated and sterilized at a predetermined time of 60 ° C. to 99 ° C., and in the cooling treatment step, the temperature of the cold air jet is set to 12.0 ° C. to 0.1 ° C. The method for producing a shell-added heat-treated egg according to claim 1, wherein: In a production apparatus for producing a shell-added heat-treated egg by heat-treating a raw egg and then cooling it,
First conveying means for conveying the raw egg in a predetermined direction;
Heat treatment means for heating and sterilizing the raw egg conveyed by the first conveying means by condensation latent heat of high-temperature steam to form a heated egg;
A second conveying means disposed downstream of the first conveying means for conveying the heated egg in the predetermined direction;
An apparatus for producing a shell-added heat-treated egg, comprising: a cooling processing unit that blows and cools the heated egg conveyed by the second conveying unit by blowing a cold air jet into the shell-added heat-treated egg. The heat treatment means is disposed so as to store the first conveyance means along the first conveyance means, and a first inlet portion into which the raw eggs are carried in and a first egg from which the heated eggs are carried out. A heat treatment housing formed with one outlet portion;
Steam generating means disposed below the first conveying means for generating high temperature steam;
The first conveying means is a belt-like body driven in the predetermined direction,
A part of the belt-like body is positioned vertically above the position where the first inlet portion and the first outlet portion are formed, and the belt-like body is formed by the steam generated by the steam generating means. 4. The apparatus for producing a shell-added heat-treated egg according to claim 3, wherein the raw egg is wrapped up. The steam generating means is disposed on the lower side of the belt-like body and is disposed at a predetermined interval in the predetermined direction, and steam means for ejecting the high temperature steam downward in the vertical direction;
A shielding member disposed below the steam means;
A steam stagnation is formed between the upper surface of the heat treatment casing and the belt-like body by the steam rising as a result of applying the steam ejected from the steam means to the shielding member, and The apparatus for producing a shell-added heat-treated egg according to claim 4, wherein the apparatus is wrapped. The heating processing casing has a plurality of heating zones defined along the predetermined direction, and the plurality of heating zones are temperature-controlled for each heating zone. 5. The apparatus for producing a shell-added heat-treated egg according to 5. The cooling processing means is disposed so as to accommodate the second transport means along the second transport means, and the second inlet portion into which the heated egg is carried and the shell-added heat-treated egg are carried out. A transport path housing formed with a second outlet portion,
The apparatus for producing a shell-added heat-treated egg according to claim 3, further comprising: an injection unit that injects the cold air jet toward the heated egg on the second conveying unit. The shell-added heat-treated egg according to claim 7, wherein the spraying means is a slit formed in the transport path housing, and the cold air jet is blown from the slit to the heated egg. Manufacturing equipment. The jetting means is a pair of slits arranged opposite to each other across the second transport means, and the cold air jet is blown from the pair of slits toward the heated egg. The apparatus for producing a shell-added heat-treated egg according to claim 7, 4. The shell-added heat-treated egg according to claim 3, wherein a plurality of the raw eggs are placed on a heat-resistant tray and conveyed in the predetermined direction by the first conveying means. apparatus.

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