JP2506255B2 - Fish heat treatment equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fish heat treatment apparatus which can be preferably used for heat treatment of so-called green fish such as sardines.

[0002]

2. Description of the Related Art Conventionally, so-called blue fish such as sardines, etc., have their freshness drastically deteriorated within 2-3 days after being landed. There is a need for a heat treatment device for fish that can. In particular, since blue fish has a large amount of fatty acids, it is easy to oxidize to produce peroxidized fatty acids when exposed to the atmosphere, and ingestion of foods containing a large amount of such peroxidized fatty acids tends to cause diseases such as cancer. Is known and therefore it is preferred to heat treat the fish so that it does not produce peroxidized fatty acids.

[0003]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a heat treatment apparatus for fish which is capable of heat treatment in a large amount and with a reduced amount of fatty acid peroxide as much as possible. It is.

[0004]

According to the present invention, there are provided (a) a trolley on which a plurality of trays on which a plurality of fish are placed are vertically mounted with a plurality of intervals, and (b) a fish mounted on the trolley. Shower room for cleaning oxygen adhering to with nitrogen gas, a heating room connected to the shower room through a door to heat and heat the fish with heated nitrogen gas, and a fish room connected to the heating room via a door And a cooling chamber for cooling with dried nitrogen gas, which is made of a heat-resistant material and allows the trolley on which the tray is mounted to pass through at a slight interval in the vertical and horizontal directions, and at the inlet and outlet. A furnace body having a door and formed in a straight line, in which part of the heated nitrogen gas from the heating chamber is supplied to the shower chamber; and (c) the carriage carried into the shower chamber, A conveying means for intermittently conveying to the cooling chamber, and (d) (D1) Branching from a first attraction position upstream of the cooling chamber in the transport direction to a first discharge position upstream of the heating chamber in the transport direction and a second discharge position in the middle of the heating chamber in the transport direction. A first conduit for introducing nitrogen gas through the respective points, and (d2) interposed between the branch point of the first conduit and the first and second discharge positions, respectively, to transfer the nitrogen gas in the cooling chamber to the heating chamber. First and second attraction fans for attracting and delivering respectively, and (d3) first and second attraction fans and first and second
Two heaters, which are respectively interposed between the discharge position and heat the nitrogen gas in the cooling chamber to 100 to 200 ° C., and (d4) are provided at the first and second discharge positions, respectively.
A heating means having a discharge port for discharging nitrogen gas heated by a heater so as to spirally rotate from an upstream side to a downstream side in the transport direction and having an axis parallel to the transport direction; And (f) a cooling unit that guides nitrogen gas from a second attraction position downstream of the heating chamber in the transport direction to a third discharge position downstream of the cooling chamber in the transport direction. (2) a third duct, (f2) a third attracting fan which is interposed on the second attracting position side of the second duct, and which attracts and delivers the nitrogen gas in the heating chamber to the cooling chamber, and (f3) a third attracting fan. And a third discharge position, which heats the nitrogen gas in the heating chamber by cooling and dehumidifying the nitrogen gas in the heating chamber with the liquid nitrogen from the liquid nitrogen source, and (f4) exchanging heat with the liquid nitrogen from the liquid source. A vaporizer that vaporizes the remaining liquid nitrogen by heating and vaporizing in a vessel, and (f5) heat exchanger A heat treatment for fish, comprising: a cooling means interposed between the third discharge position and a mixing point for mixing the nitrogen gas vaporized by the vaporizer and the nitrogen gas cooled by the heat exchanger. It is a device. Further, in the present invention, the transport means includes a rail for guiding a carriage, a pair of wheels provided outside the shower chamber and the cooling chamber, an endless rope wound around the wheels, and one wheel. It is characterized by having a driving means for driving, an engagement piece attached to the rope at a constant interval, and an abutment piece provided at a position in the lower portion of the carriage to abut the engagement piece. .
Further, according to the present invention, the door between the shower chamber and the heating chamber, the door between the heating chamber and the cooling chamber, and the door of the cooling chamber outlet can be opened in the transport direction and elastically urged in the closing direction. It is characterized by

[0005]

According to the present invention, a trolley on which a plurality of trays on which a plurality of fishes are placed are vertically loaded at a plurality of stages is carried into the shower chamber of the furnace body and attached by nitrogen gas from the heating means. The oxygen that is used is cleaned. The carriage after cleaning is intermittently transferred to the heating chamber and the cooling chamber by the transfer means.
Nitrogen gas heated to 100 to 200 ° C. from the heating means is supplied to the heating chamber in a spiral shape having an axis parallel to the transport direction from the upstream side to the downstream side in the transport direction, and is loaded on the trolley. The heated fish and heated nitrogen gas make good contact,
The fish are heat treated without the fatty acids binding with oxygen and thus producing peroxidized fatty acids. The fish in the dolly thus heat-treated is carried into the cooling chamber.
In this cooling chamber, nitrogen gas having a relatively low temperature at the outlet of the heating chamber is further cooled by heat exchange with liquefied nitrogen, and at the same time dried and supplied, the cart and the fish are cooled. In this way, the fish is cooled by the dry nitrogen gas having a low temperature introduced from the heating chamber, so that the temperature of the fish can be lowered prior to the subsequent packing work, and the fish does not have moisture during cooling. Are prevented from adhering. Also, since nitrogen gas is circulated from the heating chamber to the cooling chamber via the cooling means and from the cooling chamber to the heating chamber via the heating means, the consumption of nitrogen gas can be saved and the nitrogen gas replenishment can be performed by heat exchange. It can be performed by vaporizing the liquid nitrogen used in the vessel. Further, according to the invention, the conveying means is
Engage an engagement piece attached to an endless rope wound around a pair of wheels provided outside the shower room and the cooling chamber and an abutment piece provided at the lower portion of the carriage to form the rope. Since the trolley is driven intermittently by the driving means, when the dolly is carried into the shower room, the dolly is heated and cooled for an appropriate time, and then carried out to the outside of the cooling room in an easily processable state. According to the present invention, the shower room and the heating chamber, the door for partitioning the heating chamber and the cooling chamber and the door for the cooling chamber outlet are pushed open by the dolly along with the movement of the dolly in the transport direction, and if the dolly passes, Closes automatically. This makes it possible to limit the amount of nitrogen gas in the heating chamber discharged to the shower chamber and the amount of nitrogen gas in the cooling chamber discharged to the outside. Further, the flow of nitrogen gas between the heating chamber and the cooling chamber can be restricted.

[0006]

1 is a perspective view showing the overall construction of an embodiment of the present invention. The heat treatment apparatus 1 of the present embodiment includes a trolley 3 on which a tray 22 (see FIG. 3) on which a plurality of so-called opened fish 2 such as sardines are placed is vertically mounted with a space therebetween. This trolley 3 is carried in, the shower room 32 which wash | cleans the fish 2 mounted on the trolley 3 with nitrogen gas, the heating chamber 4 which heat-processes the fish 2 with high temperature nitrogen gas, and the fish 2 were dried at low temperature. A furnace body 6 having a cooling chamber 5 for cooling with nitrogen gas, a carrying means 10 for carrying the carriage 3 carried into the shower chamber 32 toward the downstream side in the carrying direction A in the furnace body 6, and First and second heating means for supplying nitrogen gas spirally heated to 100 to 200 ° C, preferably 150 ° C from the upstream side to the downstream side of the carriage 3 in the heating chamber 4 in the transport direction A 7, 8 and nitrogen gas whose temperature has been lowered by heating the fish 2 in the heating chamber 4, Further cooled by nitrogen and heat exchanger, is supplied to the cooling chamber 5 also performs dehumidification at the same time,
Cooling means 9 for cooling the fish 2 that has been heat-treated in the heating chamber 4.

FIG. 2 is an enlarged sectional view taken along the section line II-II of FIG. The furnace body 6 includes a furnace wall 11 made of metal such as iron, a heat insulating material 12 laminated on the outer surface of the furnace wall 11 over the entire circumferential direction, and a cover body 13 surrounding the heat insulating material 12. Have. As the heat resistant material 12, for example, glass fiber is used. Horizontal width L of furnace wall 11
1 is selected to be 1.0 m, for example, and the vertical height L2 is selected to be 1.2 m, for example. On the inner surface of the furnace wall 11, a plurality of reinforcing members 14 made of L-shaped steel are provided at intervals in the longitudinal direction of the furnace wall 11 (direction perpendicular to the paper surface of FIG. 2) to improve the strength, and the furnace wall 11 And a reinforcing member 15 made of L-shaped steel extending along the longitudinal direction of the. The furnace wall 11 is mounted and supported by a plurality of support members 17 which are channel steels arranged at intervals in the longitudinal direction on a floor 16 in a factory.

The truck 3 is carried into the furnace body 6 as described above. The trolley 3 is composed of a plurality of L-shaped steels, and a support piece 1 which is fixed to the frame body 18 with a vertical interval and is a pair of left and right L-shaped steels in FIG.
9 and a plurality (4 in this embodiment) of wheels 20 fixed to the bottom of the frame 18. Each wheel 20 can fit in a pair of rails 21 laid on the bottom of the furnace wall 11 and travel in the transport direction A. The support pieces 19 forming each pair have a plurality (two in this embodiment) shown in FIG.
0) trays 22 are loaded, and a plurality (32 in this embodiment) of fish 2 are placed on each tray 22. Since the trolley 3 is provided with a slight distance from the inner surface of the furnace body 6, for example, 2 to 3 cm, it is possible to efficiently supply high-temperature nitrogen gas to all the fish 2 on the trolley 2 for heating. You can

Each tray 22 has a flat flat portion 23, a rising portion 24 which is bent and rises upward on the downstream side in the transport direction A while the tray 22 is mounted on the carriage 3, and a downstream portion in the transport direction A. Falling part 25 that bends downward at the side end and falls down
And By forming the tray 22 in this way, the rising portion 24 of the uppermost tray 22 mounted on the carriage 3 is grasped and pulled out, so that the falling portion 25 is formed.
Engages with the rising portion 24 of the tray 22 of the next stage, and all the trays 22 mounted on the carriage 3 can be sequentially drawn out.

Referring again to FIG. 1, the furnace body 6 has a first
~ It has the 5th door 26, 27, 28, 29, 30. First
And between the 2nd doors 26 and 27, the shower room 32 for removing the air adhering to the fish 2 or the trolley 3, especially oxygen with nitrogen gas is formed, and between the 2nd and 3rd doors 27 and 28. The heating chamber 4 is formed, and the third and fourth doors 28, 29 are formed.
The cooling chamber 5 is formed between the fourth and fifth doors 2.
A waiting chamber 33 is formed between 9 and 30.

The distance between the first door 26 and the second door 27 is selected to be, for example, 0.8 m, the distance between the second door 27 and the third door 28 is selected to be 20.0 m, and the distance between the third door 28 and The distance between the fourth door 29 and the fifth door 30 is 3.2 m, and the distance between the fourth door 29 and the fifth door 30 is 3.5 m. In addition, each door 26-30
The intervals of each are the number of trolleys 3 carried into the furnace body 6 or the number of fish 2
It can be appropriately selected depending on the difference in firing time depending on the type.

The carriage 3 supplied to the furnace body 6 is
It is supplied by a traveling body 35 which can travel in the transport directions B1 and B2 perpendicular to the transport direction A by the rails 34. The traveling body 35 has four wheels 36 fitted and guided in the rails 34, and a base 37 on which the wheels 36 are mounted. The base 37 is laid inside the furnace body 6. A rail 38 is provided that is equidistant from the rail 21. In the state where the traveling body 35 is arranged immediately before the furnace body 6,
Each rail 38 forms a straight line with the rail 21, and the carriage 3 on the traveling body 35 can be moved into the shower room 32.

The rail 3 is provided at a position away from the furnace body 6.
4 is provided with a right-angled rail 39, and a plurality of carriages 3 on which fish 2 are mounted are conveyed in the direction of arrow C in a work place (not shown), and the carriages 3 on the rails 39 are transferred onto a traveling body 34, It is sequentially supplied into the furnace body 6. With such a configuration, the rail 21 in the furnace body 6 can be laid only in the furnace body 6 without protruding from the furnace body 6, and therefore, an opening for avoiding the rail 21 is formed in the first door 26. This makes it possible to improve airtightness and prevent leakage of nitrogen gas in the shower chamber 32.

The first heating means 7 has a heater 42 having a radiant tube burner 41, and an induction fan 43 for sucking nitrogen gas in the cooling chamber 5 and guiding it to the heater 42. The induction fan 43 sucks the nitrogen gas in the cooling chamber 5 from the space on the upstream side of the cooling chamber 5 in the transport direction A via the pipe line 44, and supplies the nitrogen gas to the heater 42 via the pipe line 45. The nitrogen gas heated in the heater 42 is fed into the duct 4
It is supplied from 6 to the space on the upstream side in the transport direction A of the heating chamber 4.

The supply direction of the heated nitrogen gas from the duct 46 is supplied from the upper side to the lower side to the internal space of the heating chamber 4 and from the upstream side to the downstream side in the conveying direction A. As a result, as shown by the phantom line 47 in FIG. 2, the supplied high-temperature nitrogen gas comes into contact with the inner surface of the heating chamber 4 and advances spirally, and is sucked from the duct 48 of the cooling means 9 by a fan (not shown). To be done. This makes it possible to make the temperature distribution in the heating chamber 4 uniform.

The second heating means 8 also has the above-mentioned first heating means.
The heating means 7 has substantially the same structure as that of the heating means 7, and the attraction fan 51 sucks the nitrogen gas in the pipeline 44 from the branch pipeline 50 branched from the pipeline 44, and the nitrogen gas is supplied to the pipeline 52.
And the nitrogen gas heated by the radiant tube burner 54 is supplied from the duct 55 into the heating chamber 4 at the same angle as the duct 46. The duct 55 is the duct 46.
It is provided on the downstream side in the transport direction A, for example, at a position separated by, for example, about 6 m, and prevents a temperature decrease in the heating chamber 4 due to heat treatment of nitrogen gas.

The cooling means 9 is provided with a heat exchanger 57 to which the nitrogen gas having a relatively low temperature which is sucked from the duct 48 near the end of the heating chamber 4 on the downstream side in the transport direction A is supplied. The heat exchanger 57 guides the liquefied nitrogen filled in the pressure vessel 58 to the heat transfer tube 59, heat-exchanges it with the nitrogen gas to further cool and dehydrate the nitrogen gas, and then from the duct 60 to the conveying direction A of the cooling chamber 5. It is released into the space on the downstream side. A vaporizer 61 is connected to one end of the heat transfer tube 59 to vaporize the liquefied nitrogen supplied from the pressure vessel 58, and the vaporized low-temperature nitrogen gas is supplied to the duct 60 to supply the heat exchanger. The nitrogen gas cooled by 57 is supplied to the cooling chamber 5 to supplement the nitrogen gas released to the outside.

On the ceiling of the furnace body 6, a plurality (4 in this embodiment) of temperature detectors S1 to S4 for detecting the temperatures in the heating chamber 4 and the cooling chamber 5 are provided. The first temperature detector S1 is provided near the duct 46 of the first supply means 7, and detects the temperature of the nitrogen gas discharged from the duct 46 and having a relatively high temperature. In addition, the second temperature detector S2
Is provided near the duct 55 of the second supply means 8 and detects the temperature of the nitrogen gas discharged from the duct 55 and having a relatively high temperature. Further, the third temperature detector S3 has a cooling means 9
Is provided in the vicinity of the duct 48 and detects the most downstream outlet temperature in the heating chamber 4. Further, the fourth temperature detector S4 is provided near the opening of the pipeline 44 to the cooling chamber 5, and detects the outlet temperature of the cooling nitrogen gas supplied from the duct 60 of the cooling means 9.

The low-temperature nitrogen gas supplied from the duct 60 into the cooling chamber 5 is dehumidified by the cooling in the heat exchanger 57 by condensing the water contained in the nitrogen gas from the upstream duct 48. Therefore, the fish can be cooled in a dry state without adhering moisture to the fish supplied into the cooling chamber 5.

FIG. 4 is a perspective view showing a concrete structure of the conveying means 10. For example, an endless cord 63 that is a wire or chain made of metal such as stainless steel.
Is a drive-side wheel 64 that is wound around a pair of wheels 64 and 65 and stretched, and is arranged on the upstream side in the transport direction A.
Is transmitted from the motor 66 via the speed reducer 67. A plurality of engagement pieces 68 are fixed to the cord 63 at predetermined intervals L3. As shown in FIG. 2, the engagement piece 68 contacts the contact piece 85, which is fixed to the lower portion of the carriage 3 at a position displaced from the center, from the upstream side in the transport direction A to move the carriage 3 in the transport direction A. It can be transported toward the downstream side.

The interval L3 is, as shown in FIG.
The length L4 of the carriage 3 in the longitudinal direction and the second to fourth doors 27 to 2
The width L5 of 9 and a small margin length α between the trolley 3a and the door that follow it are added (L3 = L4 + L5 + α). In connection with the configuration of the transport means 10 as described above,
The second to fourth doors 27 to 29 are provided with a stopper 69 at the bottom of the furnace body 6 in order to prevent angular displacement from the closed state which is perpendicular to the wall surface to the upstream side in the transport direction A, and A tension spring 70 is provided to elastically pull each of the doors 27 to 29 upstream in the transport direction A. Therefore,
Each carriage 3 is intermittently conveyed toward the downstream side in the conveyance direction A at intervals L3 by the conveying means 10, and each door 27 is conveyed.
-29 before each door 27-29 is separated by a distance α, and then stopped by a distance (α + L5), the carriage 3 causes the doors 27-29 to resist the spring force of the tension spring 70. When the doors are pushed open and the distance L4 is further advanced, those doors 27 to 29 are closed by the spring force of the tension spring 70. A packing 71 made of a heat-resistant material such as heat-resistant rubber may be provided on the periphery of each door 27 to 29 to prevent leakage of nitrogen gas.

FIG. 6 is an enlarged sectional view of the vicinity of the connecting portion 73 of the furnace body 6, and FIG. 7 is a plan view thereof. In FIG. 7, the heat insulating material 12 and the cover body 13 are omitted for the sake of simplicity. 100-200 as described above
Since the furnace body 6 to which the nitrogen gas of 0 ° C. is supplied expands in the longitudinal direction by heat, the connecting portion 73 must prevent the nitrogen gas from leaking and absorb the thermal expansion. Therefore, in this embodiment, the furnace body 6 is provided with the connecting portions 73 at every 2.4 m. The connecting portion 73 has a gap 7 of about 2 to 3 cm between the blocks 74 and 75 adjacent to each other in the longitudinal direction of the furnace body 6.
6 is formed, and a connecting plate 77 extending between the blocks 74 and 75 is provided over the entire circumference in the circumferential direction. The connecting plate 77 has a long hole 8 through which bolts 78 and 79 planted in the blocks 74 and 75 by welding or the like are inserted.
0, 81 are formed to extend in the longitudinal direction of the furnace body 6, nuts 82, 83 are screwed to the bolts 78, 79, respectively, to allow mutual thermal expansion of the blocks 74, 75 and It is configured so that the leakage of nitrogen gas can be prevented.

FIG. 8 is a block diagram showing the electrical construction of the control means 86 for controlling the conveying means 10. A truck detection switch 87 for detecting the truck 3 and a door detection switch 88 for detecting that the first door 26 is closed are provided in the shower room 32 of the furnace body 6. Each switch 87, 88 is realized by, for example, a limit switch. When the carriage 35 is moved in the direction of arrow B1 and the carriage 3 is carried into the shower room 32, first, the switching mode of the carriage detection switch 87 is switched from low level to high level, and this output is controlled by the control means 86. It is input to the circuit 89. The control circuit 89 is realized by, for example, a microcomputer.

The trolley is carried into the shower room 32 and the first
When the door 26 is closed, the output of the door detection switch 88 is switched from low level to high level, and this output is input to the control circuit 89. The control circuit 89 to which the outputs from the respective switches 87 and 88 are input causes the timer 90 to start the time counting operation, and when a predetermined set time, for example, 3 seconds has elapsed, outputs a drive signal to the drive circuit 91 and receives this. The drive circuit 91 supplies drive power to the motor 66 (see FIG. 4) to drive the motor 66, and the carriage 3 is moved by the distance L3.
To drive.

When the carriage 3 is conveyed by the distance L3 downstream in the conveying direction A, the control circuit 89 outputs a stop signal, which causes the drive circuit 91 to stop the supply of drive power to the motor 66. From this stop time, the timer 90 restarts the time counting operation, and the motor 66 maintains the stopped state for a predetermined time. This stop time is set to, for example, about 2 to 4 minutes.

In this way, the carriage 3 is moved into the shower room 32.
Each time the sheet is loaded, the motor 66 is intermittently driven / stopped in response to the output from the switches 87 and 88, and the carriage 3 can be sequentially fed into the heating chamber 4.

FIG. 9 is a block diagram showing the electrical construction of the control means 93 for controlling the heaters 42 and 53. The control means 93 includes first to fourth temperature detectors S1 to S.
A control circuit 94 to which each output from 4 is input is provided. In the control circuit 94, a discrimination level for operating or stopping each of the heaters 42, 53 is set based on the outputs from the first to third temperature detectors, and the temperature setting means 9 is set.
When the temperature exceeds the allowable range set in advance for the temperature set by 5, that is, when the discrimination level is exceeded,
By outputting a control signal and supplying / interrupting the drive power from the drive circuits 96 and 97, the heaters 42 and 53 can be operated / stopped and the temperature in the heating chamber 4 can be controlled. The output from the fourth temperature detector S4 is the temperature setting means 9 described above.
When the cooling temperature exceeds the allowable range of the cooling temperature and is abnormally changed, the control circuit 94 outputs a control signal to selectively operate / stop the heaters 42 and 53 to adjust the temperature. it can.

FIG. 10 is a diagram for explaining the operation of the heat treatment apparatus 1. First, the fish 2 that has been processed into two pieces at the fish processing plant is soaked in the liquid smoke and aligned and placed on the tray 22, and each tray 22 is a plurality of pieces on the trolley 3 with a slight gap ( In this embodiment, it is mounted 20). In this way, the trolley 3 on which a plurality of fishes 32 (32 in this embodiment) are placed on the tray 22 is conveyed in the direction of arrow C along the rail 39, is transferred onto the traveling body 35, and arrow B1. Is conveyed in the direction. In this state, as shown in FIG. 10 (1),
The operator opens the first door 26, and the truck 3 is ready for insertion. At this time, the heaters 42 and 53 are in operation,
The heating chamber 4 is filled with nitrogen gas at a predetermined temperature, for example 150 ° C., at a pressure slightly higher than atmospheric pressure.

In this state, as shown in FIG. 10 (2), the carriage 3 is carried into the shower room 32. At this time, the second door 27 is slightly opened, or a communication hole for communicating the shower chamber 32 and the heating chamber 4 is formed in advance, so that the high temperature nitrogen gas in the heating chamber 4 is guided to the shower chamber 32. The air in the shower room 32 and the air attached to the carriage 3 are washed away.

After the carriage 3 is carried into the shower room 32,
When 3 seconds have elapsed, the transport means 10 is driven and the carriage 3
As shown in FIG. 10 (3), the second door 27 is pushed open and loaded into the heating chamber 4. At this time, shower room 3
As shown in FIG.
a has been carried in, and the air in the shower room 32 and the air adhering to the carriage 3a are washed away by the nitrogen gas.

Such FIG. 10 (1) to FIG. 10 (4)
While repeating the operation shown in FIG.
After being carried in, the carrying means 10 intermittently repeats the operation of carrying the distance L3 every time set by the timer 90, for example, every 2 to 4 minutes.

As shown in FIG. 10 (5), when the front carriage 3 pushes out the third door 28 from the heating chamber 4 and exits, the fish 2 on the tray 22 mounted on the carriage 3 is It has been baked well. By thus burning the fish 2 with the high-temperature nitrogen gas, there is no fear that the fatty acids contained in the fish 2 will be oxidized, and thus the generation of peroxidized fatty acids, which are said to be the cause of cancer and the like, will be prevented. You can

As shown in FIG. 10 (6), the cooling chamber 5
When the cart 3 is placed inside, the fish 2 and the cart are cooled by the low-temperature dry nitrogen gas cooled by the cooling means 9. Since this low-temperature nitrogen gas is dry due to the dehumidifying effect of the cooling means 9, the fish 2 mounted on the carriage 3 is cooled while being dried, and then the transport means 10 is used.
Is carried into the waiting room 33. The carts 3 cooled in the cooling chamber 5 are sequentially loaded into the standby chamber 33, and the time can be adjusted according to the progress of the subsequent packing operation. here,
The engaging piece 68 of the conveying means 9 is the contact piece 7 provided on the carriage 3.
Then, the worker manually opens the fifth door 30 to take out the trolley 3 and packing is performed. In such a standby chamber 33, a packing device for picking up the fish 2 from the tray 22 mounted on the cart 3 and packing the fish 2 may be provided. In this case, the fish 2 can be loaded into the pack container in an airtight state with almost no contact with air.

[0034]

[0035]

As described above, according to the present invention, a trolley on which a plurality of trays on which a plurality of fish are placed are vertically mounted with a plurality of trays spaced apart from each other is provided on the inner surface of the furnace body and on the upper, lower, left and right sides. After being carried into the shower room in the furnace at intervals, the oxygen adhering to the fish was removed with nitrogen gas, and then the high-temperature nitrogen gas heated by the heating means was used to heat the nitrogen gas from the cooling chamber from the upstream side to the downstream side. Since it is carried into the heating chamber that is supplied in two stages in a spiral shape,
High-temperature nitrogen gas is efficiently supplied to a large number of fish, and all fish on the trolley can be uniformly heat-treated in the absence of oxygen, and no harmful substances such as fatty acid peroxide are generated during the heat treatment. . Also, the relatively low temperature nitrogen gas that heated the fish at the outlet of the heating chamber is exchanged with liquid nitrogen for further cooling, and at the same time dehumidified and supplied to the cooling chamber,
Nitrogen gas can be saved and the steam generated from the fish is hardly contained in the heating chamber, and the heat-treated fish can be cooled while being dried in the cooling chamber. Further, since the liquid nitrogen used for the heat exchange is vaporized and used for the supplement of the nitrogen gas, there is no waste. Further, according to the present invention, simply by loading a trolley carrying a large number of fish into the shower room,
Heat treatment and cooling are carried out through the cooling chamber and carried out to the outlet of the cooling chamber in a state where it is easy to handle. This makes it possible to heat-treat a large number of fish continuously and improve productivity. Further, according to the present invention, the door for partitioning the shower room and the heating room, the door for partitioning the heating room and the cooling room, and the door for the cooling room outlet can be opened only when the trolley passes through and can be closed when the truck is passing. It is possible to save gas and energy for heat treatment of fish.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of a heat treatment apparatus 1 according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the section line II-II in FIG.

FIG. 3 is a perspective view of the tray 22.

FIG. 4 is a simplified perspective view for explaining a conveying unit 10 and a configuration related thereto.

FIG. 5 is a diagram for explaining a transporting distance L3 by the transporting means 10.

6 is a partial cross-sectional view showing the structure of a connecting portion 73. FIG.

7 is a plan view showing the structure of a connecting portion 73 as seen from above in FIG.

8 is a block diagram showing an electrical configuration of control means 86 for controlling the transport means 10. FIG.

FIG. 9: Control means 9 for controlling the heaters 42, 53
3 is a block diagram showing an electrical configuration of FIG.

FIG. 10 is a diagram for explaining the operation of the heat treatment apparatus 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat treatment apparatus 2 Fish 3 Truck 4 Heating chamber 5 Cooling chamber 6 Furnace body 7 1st supply means 8 2nd supply means 9 Cooling means 10 Conveying means 11 Furnace wall 12 Insulation material 13 Cover body 26 1st door 27 2nd door 28 Third door 29 Fourth door 30 Fifth door 32 Shower room 33 Standby room 35 Traveling body 42,53 Heater S1 to S4 Temperature detector

Claims (3)

(57) [Claims] 1. A trolley for mounting a plurality of trays on which a plurality of fish are placed at a plurality of vertical intervals, and (b) oxygen attached to the fish on the trolley by nitrogen gas. A shower room to be washed, a heating chamber connected to the shower room through a door to heat and heat the fish with heated nitrogen gas, and a nitrogen gas that is connected to the heating chamber via a door to cool and dry the fish It has a cooling chamber for cooling, is made of a heat-resistant material, and the truck on which the tray is mounted can pass through it with a slight distance in the vertical and horizontal directions, and has doors at the entrance and exit, and has a linear shape. The furnace body formed and supplied with a part of the heated nitrogen gas from the heating chamber to the shower chamber, and (c) the carriage carried into the shower chamber are intermittently transported to the heating chamber and the cooling chamber. Transporting means, and (d) heating means, Nitrogen gas is guided from a first attraction position upstream of the cooling chamber in the transport direction to a first discharge position upstream of the heating chamber in the transport direction and a second discharge position intermediate of the heating chamber in the transport direction via branch points. First pipe and (d2) first and second pipes, which are respectively interposed between the branching point of the first pipe and the first and second discharge positions, and draw and deliver the nitrogen gas in the cooling chamber to the heating chamber, respectively. Attracting fan of (d3) first and second attracting fan and first and second
Two heaters, which are respectively interposed between the discharge position and heat the nitrogen gas in the cooling chamber to 100 to 200 ° C., and (d4) are provided at the first and second discharge positions, respectively.
A heating means having a discharge port for discharging nitrogen gas heated by a heater so as to spirally rotate from an upstream side to a downstream side in the transport direction and having an axis parallel to the transport direction; And (f) a cooling unit that guides nitrogen gas from a second attraction position downstream of the heating chamber in the transport direction to a third discharge position downstream of the cooling chamber in the transport direction. (2) a third duct, (f2) a third attracting fan which is interposed on the second attracting position side of the second duct, and which attracts and delivers the nitrogen gas in the heating chamber to the cooling chamber, and (f3) a third attracting fan. And a third discharge position, which heats the nitrogen gas in the heating chamber by cooling and dehumidifying the nitrogen gas in the heating chamber with the liquid nitrogen from the liquid nitrogen source, and (f4) exchanging heat with the liquid nitrogen from the liquid source. A vaporizer that vaporizes the remaining liquid nitrogen by heating and vaporizing in a vessel, and (f5) heat exchanger A heat treatment for fish, comprising: a cooling means interposed between the third discharge position and a mixing point for mixing the nitrogen gas vaporized by the vaporizer and the nitrogen gas cooled by the heat exchanger. apparatus. 2. The transporting means, rails for guiding a carriage, a pair of wheels provided in the shower chamber and outside the cooling chamber, and an endless rope wound around the wheels.
A drive means for driving one wheel, an engagement piece attached to the rope at a constant interval, and a lower portion of the carriage,
The fish heat treatment apparatus according to claim 1, further comprising an abutment piece provided at a position abutting the engagement piece. 3. A door between the shower chamber and the heating chamber, a door between the heating chamber and the cooling chamber, and a door at the outlet of the cooling chamber are openable in the carrying direction and elastically urged in the closing direction. The heat treatment apparatus for fish according to claim 2, wherein: