JPS6326967B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for supplying oxygen necessary for respiration to live fish, etc. in a live fish transportation device for transporting live fish and other seafood while they are still alive in an aquarium, and a device used therefor. The purpose is to prevent the freshness of the fish from deteriorating during transportation.

When a large quantity of live fish is placed in an aquarium and transported by truck for a long time, it is necessary to supply sufficient oxygen to the water in the fish chamber to prevent the live fish from weakening due to lack of oxygen.

Conventionally, this was done by blowing in a small amount of oxygen from the bottom of the fish chamber containing live fish to dissolve it in the water. However, despite the supply of sufficient oxygen, there was a problem in that the live fish etc. weakened and became less viable, resulting in a decrease in commercial value.

The inventors of the present invention investigated the cause and found that it is because oxygen bubbles adhere to the gills and body of live fish, making it difficult to breathe through the gills and having an adverse effect on the surface of the body.

The present invention aims to maintain the life of live fish etc. by preventing air bubbles from adhering to the gills and body of live fish etc. while allowing sufficient oxygen to be dissolved in water. For this purpose, oxygen is dissolved in the water in an oxygen supply chamber installed in a separate location from the fish room, and the water with a sufficiently large amount of dissolved oxygen is sent to the fish room to feed live fish, etc. It is meant to give.

Examples of the live fish transportation device according to the present invention will be described below.
The explanation will be based on the drawings.

A fish tank 3 is installed on the loading platform 2 of the truck 1,
A mechanical unit 4 and a liquefied oxygen cylinder 5 as an oxygen supply source are arranged side by side on the front side of the fish tank 3.

The inside of the fish tank 3 is divided into three chambers, front and rear.The front and rear chambers are each a live fish chamber 6, and an over chamber 7 is formed in the upper part of the middle chamber, and an oxygen supply chamber 8 is formed in the lower part. A partition wall 9 separates the space from the intermediate chamber. The outer peripheral wall 10 of the fish tank 3 has two
It is formed of a heat insulating wall in which urethane foam 12 is sandwiched between FRP resin plates 11, 11, and each working hole 1 is provided on the upper wall of the fish tank 3, above the live fish chamber 6 and the over chamber 7.
3 and 14 are opened, and each working hole 13 and 14 is opened and closed by each lid 15 and 16, respectively. A communication path 17 is formed on the lower surface of the upper wall of the fish tank 3 to allow water in the live fish chamber 6 to overflow into the over chamber 7. Filters 18 are arranged in layers in the filter chamber 7.
The oxygen supply chamber 8 accommodates an oxygen distributor 19 made of a porous material.

A water suction pipe 20 led out from the bottom of the oxygen supply chamber 8 is connected to a water circulation pump 22 via a liquefied oxygen vaporization heat exchanger 21 disposed within the mechanical unit 4. The water discharge pipe 23 of the water circulation pump 22 is connected to the branch pipe 2.
4 to cold water spout pipes 25 arranged at the bottoms of both live fish chambers 6.

Main valve 26 for taking out liquefied oxygen from liquefied oxygen cylinder 5
The adiabatic conduit 27 led out from the heat exchanger 21 is connected to the heat exchanger 21, and the oxygen supply pipe 28 led out from the outlet of the heat exchanger 21 is connected to the oxygen distributor 19 of the oxygen supply chamber 8 and the live fish chamber through a flow control valve 29. 6 oxygen jet pipe 3
Connected to 1. This oxygen jet pipe 31 is connected to the live fish chamber 6.
When a changeover valve 32 is operated when a problem occurs in the oxygen disperser 19, oxygen is spouted into the live fish chamber 6.

Note that 30 in the figure is a drain device for the live fish chamber 6.

Next, the method for cooling water in a live fish transport tank according to the present invention will be explained using the cooling device configured as described above.

When the circulation pump 22 is driven, water in the oxygen supply chamber 8 flows into the heat exchanger 21 through the water suction pipe 20, where the liquefied oxygen and water exchange heat and vaporize the liquefied oxygen, and the heat of vaporization is released. cool the water with
The cooled water is pumped to the bottom of the live fish chamber 6 by a circulation pump 22. Dust generated from fish in the live fish chamber 6 floats near the water surface and flows into the communication path 17 along with the water.
The oxygen flows into the filter chamber 7, passes through the filter 18, flows down to the oxygen supply chamber 8 located below the filter chamber 7, and is sucked into the water suction pipe 20 again.

On the other hand, the oxygen gas vaporized in the heat exchanger 21 has its flow rate adjusted by the flow rate control valve 29, and then is supplied from the oxygen distributor 19 in the oxygen supply chamber 8 to the water in the oxygen supply chamber 8 and dissolves in the water. .

The method and apparatus of this invention have the above-mentioned implementation procedure and structure, and therefore have the following effects.

B. Oxygen is supplied to an oxygen supply chamber installed in a separate location from the fish chamber, and the oxygen is dissolved in the water here.
Even though a sufficient amount of oxygen can be dissolved in water, oxygen bubbles are only generated in the oxygen supply chamber and do not adhere to live fish etc. in the fish chamber.

Therefore, by sending water rich in dissolved oxygen into the fish room from the oxygen supply chamber, it is possible to provide enough water to live fish, etc., and to prevent live fish from having difficulty breathing due to air bubbles adhering to their gills or adversely affecting the surface of their bodies. It is possible to transport live fish over long distances while still in good health, and while maintaining the high commercial value of live fish, it is possible to dramatically expand the range of distribution to every corner of Japan. .

(b) In order to dissolve oxygen evenly in the water in the fish chamber, conventionally, oxygen outlets had to be spread all over the wide fish chamber, which made the structure larger and required oxygen to be distributed throughout the entire fish chamber. It is extremely difficult to disperse and dissolve it evenly.

In contrast, in the present invention, oxygen can be evenly dissolved in water in a narrow oxygen supply chamber, so
Not only can the device be made smaller, but water with a large amount of evenly dissolved oxygen can be evenly supplied throughout the fish chamber.

(c) When oxygen is effectively supplied into water through a particularly fine porous disperser, when the oxygen supply is stopped, water permeates into the disperser, creating a large resistance and causing the oxygen to be supplied next time. It may not be possible to blow out uniformly. In order to ensure that the next oxygen blowout is uniform and smooth,
Before stopping the oxygen supply, it is necessary to float the disperser above the water surface.

In this case, conventionally, the disperser is a large one that is enclosed in a large fish chamber, and therefore, levitation work is difficult and takes time and effort.

In contrast, in the present invention, the disperser can be made small enough to fit into a narrow oxygen supply chamber, so the floating operation can be carried out easily and quickly.

D. When the water temperature is higher than the appropriate survival temperature for live fish, such as during summer, the water should be cooled to prevent live fish from becoming exhausted.

In this case, if oxygen is dissolved in warm water before cooling, the amount of oxygen dissolved will increase, making it possible to supply abundant oxygen to live fish, etc., and the rate of oxygen dissolution will increase, reducing loss. , it is also highly economical.

(e) If liquefied oxygen is used as the oxygen source and the water is cooled by its sensible heat and vaporized sensible heat, the refrigerator can be omitted, and the manufacturing and operating costs of the entire live fish transport system can be significantly reduced, and the truck The space for installing a fish room above can be expanded by the space omitted from the refrigerator, and the amount of live fish etc. to be transported can be increased.

F. If there is a problem with the oxygen disperser and oxygen cannot be supplied from the oxygen disperser into the live fish chamber, oxygen can be supplied into the live fish chamber from the oxygen jet pipe placed at the bottom of the live fish chamber, and the live fish It is possible to constantly supply oxygen to the room. Therefore, even if an unexpected situation occurs, such as a problem with the oxygen distributor during long-distance transport, oxygen can be supplied into the live fish chamber from the oxygen jet and the fish in the live fish chamber can be kept alive. , the product value of live fish, etc. can be maintained at a high level.

[Brief explanation of the drawing]

The drawings show an embodiment of the live fish transportation device according to the present invention, with FIG. 1 being a plan view and FIG. 2 being a flow chart of water and oxygen. 3...Live fish transport tank, 5...Oxygen supply source (liquefied oxygen cylinder), 6...Live fish room, 8...Oxygen supply room,
9... Partition wall, 19... Oxygen disperser, 20... Water absorption pipe, 21... Cooling device (heat exchanger), 22...
Water circulation pump, 28...Oxygen supply path, 31...Oxygen jet pipe.

Claims (1)

[Scope of Claims] 1 A live fish transport device is provided with a live fish chamber 6 and an oxygen supply chamber 8, an oxygen jet pipe 31 is disposed at the bottom of the live fish chamber 6, an oxygen dispersion device 19 is disposed in the oxygen supply chamber 8, and oxygen The outlet of the oxygen supply path 28 led out from the supply source 5 can be switched between communicating with the live fish chamber 6 via the oxygen jet pipe 31 and communicating with the oxygen supply chamber 8 via the oxygen distributor 19. In a state in which the outlet of the oxygen supply path 28 is connected to the oxygen supply chamber 8 via the oxygen distributor 19, the water in the live fish chamber 6 is sent to the oxygen supply chamber 8, and the oxygen from the oxygen supply source 5 is is supplied to the oxygen supply chamber 8 to dissolve oxygen in water in the oxygen supply chamber 8, and thereby water containing a large amount of dissolved oxygen is sent from the oxygen supply chamber 8 to the live fish chamber 6, and the oxygen supply path 28 is When the outlet is connected to the live fish chamber 6 via the oxygen jet pipe 31, oxygen is sent into the live fish chamber 6 by blowing oxygen from the oxygen supply source 5 into the live fish chamber 6. A method of supplying oxygen to the live fish room of a live fish transportation device. 2. In the method for supplying oxygen to a live fish chamber of a live fish transportation device as set forth in claim 1, water in which a large amount of oxygen has been dissolved in the oxygen supply chamber 8 is cooled by cooling device 21.
After being cooled down, the fish is sent to the live fish chamber 6. 3. In the method for supplying oxygen to a live fish chamber of a live fish transportation device as set forth in claim 2, liquefied oxygen is supplied from the oxygen supply source 5 to the heat exchange type water cooling device 21, where the liquefied oxygen and water are combined. The liquefied oxygen is endothermically vaporized by heat exchange, water is cooled by the heat of vaporization of the liquefied oxygen, the vaporized oxygen is supplied to the oxygen supply chamber 8, and the cooled water is sent to the live fish chamber 6. 4 A live fish transport device is provided with a live fish chamber 6 and an oxygen supply chamber 8, an oxygen jet pipe 31 is placed at the bottom of the live fish chamber 6, an oxygen distributor 19 is placed in the oxygen supply chamber 8, and the water in the live fish chamber 6 is A circulation pump 22 is configured to allow circulation between the live fish chamber 6 and the oxygen supply chamber 8, and the oxygen supply source 5
A switching valve 32 is installed in the middle of the oxygen supply path 28 led out from
A live fish transportation device characterized in that the outlet is communicated with the live fish chamber 6 through the oxygen jet pipe 31 and into the oxygen supply chamber 8 through the oxygen distributor 19. 5. The live fish transport device as set forth in claim 4, in which a live fish chamber 6 and an oxygen supply chamber 8 are partitioned into a live fish transport aquarium 3 by a partition wall 9. 6. In the live fish transportation device according to claim 4 or 5, the water supply channel 20 led out from the oxygen supply chamber 8 is connected to the circulation pump 22 and the cooling device 21.
Connected to live fish room 6 via. 7 In the live fish transportation device described in claim 6, a liquefied oxygen cylinder is used as the oxygen supply source 5, a heat exchange type water cooling device is used as the cooling device 21, and the oxygen supply derived from the oxygen supply source 5 is used. The passage 28 is connected to the oxygen supply chamber 8 via a heat exchange type water cooling device 21.