JPS6219898Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a fishing boat freezing device for rapidly freezing captured fish.

Generally, in order to preserve the freshness of captured fish, it is necessary to rapidly freeze the captured fish before storing it in a storage or the like maintained at a predetermined temperature or lower.

Traditionally, the method of quickly freezing fish caught on fishing boats, etc. is to put the fish into an insulated tank, and after the fish in the tank reach a certain amount, freeze the fish in an aqueous solution such as table salt or calcium chloride. at a temperature slightly higher than the freezing temperature (for example, about -17℃ in the case of saline solution)
There are two known methods: injecting brine that has been cooled to 100%, or filling a tank with an appropriate amount of brine in advance and sequentially throwing the captured fish into the tank.

However, with the former method, the time it takes for the fish in the tank to reach a certain amount is not constant due to variations in the amount of fish caught, so it may not be possible to freeze the captured fish quickly. Since a large amount of fish is frozen at one time, the temperature of the brine rises, leading to problems such as a decrease in freezing capacity.

In addition, in the latter method, since the specific gravity of the fish is smaller than the specific gravity of the brine, the fish that were previously introduced into the tank float to the surface layer of the brine, making it difficult to introduce subsequent fish. Therefore, by lowering the brine level so that a considerable amount of fish can be put into the tank,
As a result, the brine supply port, which is usually provided at the top of the tank, is located above the liquid level of the brine, and as a result, the brine that falls from the brine supply port generates bubbles, which significantly reduces the refrigerating capacity.
On the other hand, if the brine supply port is installed at the bottom of the tank, the generation of bubbles can be prevented, but the temperature distribution conditions in the layer above the brine supply port will be poor, so the actual usable volume of the freezing tank will be reduced. This will result in a lower level of performance.
Therefore, under the present circumstances, it is necessary to inject a certain amount of brine into the tank, then throw in the fish, and then inject brine again and perform circulation cooling.

The purpose of this invention is to suppress the temperature rise of brine,
To provide a freezing device for a fishing boat that can continuously and completely freeze captured fish.

Therefore, in the present invention, a fish feeding guide cylinder whose upper and lower ends are opened and whose upper end opening protrudes above the liquid level of the brine is arranged in a freezing tank whose interior is filled with sufficient brine in advance. A supply means is provided for supplying brine to the upper end side and causing a flow of brine from the upper end side to the lower end side of the guide cylinder due to the liquid level difference between the liquid level in the guide cylinder and the liquid level in the freezing tank. This allows the fish thrown into the upper opening of the guide tube to be brought to near the bottom of the freezing tank by the flow of brine, and then floated up to the brine liquid level, thereby allowing fish to be thrown in continuously without any hindrance. , which attempts to achieve the above objective by completely freezing the continuously inputted fish one after another.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, a freezing tank 1 is composed of a tank body 2 formed of a heat insulating material or the like and having an open upper end, and a lid 3 detachably fitted onto the upper end opening of the tank body 2. . The tank body 2 has a liquid draining pipe 4 projecting from the lower part of the peripheral wall thereof, and an overflow pipe 5 projecting from the upper part thereof. A valve, not shown, is connected to the pipe 4, and a tank, etc., not shown, is connected to the pipe 5. Moreover, the lid body 3
A fish inlet 6 is formed approximately in the center thereof and extends upward into a cylindrical shape. In the fish input port 6,
A lid 7 is removably fitted on the outer periphery of the upper end, and the upper end of a vertical cylinder 8 is fixed inside. The cylindrical body 8 has an outer cylindrical part 9, which is a partitioning cylindrical part, whose diameter expands upward as it goes upward, and whose outer periphery is fixed to the inner wall of the fish input port 6.
and an inner cylinder 10 serving as a guide cylinder, which is arranged inside the outer cylinder 9, has a lower end protruding slightly downward from the lower end of the outer cylinder 9, and has an upper end outer circumferential edge which is flared at the end and is fixed to the inner wall of the fish input port 6. It is composed of. A supply pipe 11 for feeding compressed air between the outer cylinder 9 and the inner cylinder 10 is formed at the lower part of the peripheral wall of the outer cylinder 9, and a hose 12 or the like is connected to the supply pipe 11 so that the supply pipe 11 is installed on a fishing boat. A compressor 15 serving as compressed air supply means is connected as appropriate. Here, the compressor 15 and the outer cylinder 9 constitute a liquid supply means 16. In addition, the inner cylinder 10
has a guide part 13 which is flared at the upper part thereof.
A large number of communication holes 14 are formed therein.

Next, the operation of this embodiment will be explained. First, brine cooled by a refrigerator to a temperature slightly higher than the freezing temperature is injected into the tank body 2, and is filled to the level where it overflows through the pipe 5. Here, the compressor 15 is operated and the supply pipe 11
When compressed air is sent between the inner cylinder 10 and the outer cylinder 9, the brine filled between the inner cylinder 10 and the outer cylinder 9 will flow between the inner cylinder 10 and the outer cylinder 9 as the compressed air rises. After being pushed upward along the gap, it flows into the inner cylinder 10 through the communication hole 14. Then, a liquid level difference occurs between the liquid level in the inner cylinder 10 and the liquid level in the tank body 2, that is, the liquid level of the brine in the inner cylinder 10 becomes higher than the liquid level of brine in the tank body 2. Therefore, due to the liquid level difference, a flow occurs in which the brine filled in the tank body 2 is circulated from the upper end to the lower end of the inner cylinder 10.

Therefore, when the lid 7 is removed and the captured fish is thrown into the inner cylinder 10 in a state where such a flow of brine is occurring, the fish thrown in will move inside the inner cylinder 10 due to the flow of brine. After being carried toward the lower end opening and pushed to the outside of the inner cylinder 10 and outer cylinder 9, it is floated to the liquid level of the brine due to the difference in specific gravity with the brine. Therefore, even if fish are continuously introduced into the inner cylinder 10, the fish will be placed in the cylinder 8 one after another.
Since the fish are floated to the outside of the tank, there is no problem in putting the fish in, and the fish are sequentially frozen during the process of passing through the inner cylinder 10 and floating to the liquid surface outside the outer cylinder 9. , it can be completely frozen processed without increasing the temperature of the brine. At this time, the brine in the tank body 2 overflows into the tank etc. through the pipe 5 in proportion to the amount of fish thrown into the tank body 2, so the liquid level of the brine in the tank body 2 is always maintained at a constant level. .

On the other hand, when a certain amount of fish has been frozen in this way, the brine from the tank body 2 is removed through the pipe 4, the lid 3 is removed, and the fish are put into the tank body 2 and frozen. The fish are taken out, transported to a storage facility, etc., and stored there.

Therefore, according to this embodiment, the cylinder body 8 whose upper end opening faces above the brine liquid level is vertically disposed in the tank body 2 whose interior is filled with brine in advance, and the upper end of the cylinder body 8 is vertically disposed. Since the brine is supplied to the side and circulated from the upper end opening of the cylinder 8 toward the lower end opening due to the liquid level difference between the liquid level of the cylinder 8 and the liquid level of the tank body 2, the cylinder 8 The fish thrown into the interior are carried toward the lower end opening of the cylinder 8 by the flow of brine, and then floated along the outside of the cylinder 8, so the fish can be fed continuously without any hindrance. Since the fish introduced into the brine are sequentially frozen as they pass through the cylinder 8 and float to the outside, they can be completely frozen without increasing the temperature of the brine.

In addition, the cylinder body 8 is made up of an inner cylinder 10 and an outer cylinder 9, compressed air is fed between them, and the brine is circulated by this compressed air, so it can be used in a similar manner to the existing cylinders normally installed on fishing boats. Since the compressor 15 can be used as a compressed air supply means, it can be constructed easily and inexpensively. Furthermore, since the upper portions of the inner tube 10 and the outer tube 9 have a shape that widens in diameter toward the top, it is possible to easily insert fish. In addition, an overflow pipe 5 is provided in the tank body 2, and this pipe 5
Since the brine that overflows through the tank is collected into the tank, you can work without wasting the brine. Furthermore, since the lid 3 is made detachable from the tank body 2, the fish can be easily removed by removing the lid 3 when taking out the frozen fish from the tank body 2.

In addition, in practice, as a means for circulating the brine, a pump or the like may be used instead of compressed air, and the passage for circulating the brine may also be two, as in the above embodiment. The cylinder body 8 is not limited to a multi-cylindrical shape, but may be a cylinder body placed side by side, for example, a cylinder body having a cross section approximately in the shape of a "h", one of which is used for raising the brine, and the other one is used for lowering the brine and fish. Furthermore, if the liquid level of the brine filling the tank body 2 is made higher than in the above embodiment and extends up to the fish input port 6, bubbles generated on the liquid level can be reduced.

As described above, according to the present invention, it is possible to provide a fishing boat refrigeration device that suppresses the temperature rise of brine and can continuously and completely freeze captured fish.

[Brief explanation of the drawing]

The figure is a sectional view showing an embodiment of the present invention. 1... Freezing tank, 2... Cylindrical body, 9... Outer cylinder, 10
... Inner cylinder, 14 ... Communication hole, 15 ... Compressor as compressed air supply means, 16 ... Liquid supply means.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a fishing boat refrigeration system that freezes caught fish by putting it into a freezing tank filled with brine, the freezing tank has upper and lower ends open and an upper end. A fish feeding guide tube with an opening protruding above the liquid level of the brine is arranged, and brine is supplied to the upper end of the guide tube to compensate for the difference in liquid level between the liquid level in the guide tube and the liquid level in the freezing tank. A refrigeration system for a fishing boat, characterized in that it is provided with a liquid supply means for causing a flow of brine from the upper end side to the lower end side of the guide cylinder. (2) Utility Model Registration Claim Paragraph 1 provides that the liquid supply means is disposed along the outer periphery of the guide tube, and has an upper end open facing the upper end opening of the guide tube, and a lower end open. and a compressed air supply means for sending compressed air between the partition tube and the guide tube, and the compressed air from the compressed air supply means is used to increase the distance between the partition tube and the guide tube. A refrigeration system for a fishing boat, characterized in that brine is allowed to flow into an opening at the upper end of a guide cylinder. (3) In claim 2 of the utility model registration claim, the upper portions of the partition tube and the guide tube are formed into a shape that widens toward the end and whose diameter increases upwardly, and
A refrigeration device for a fishing boat, characterized in that a communication hole is formed in the upper circumferential wall of the guide tube so that the guide tube and the partition tube communicate with each other.