JP6891141B2 - Hypopnea induction device - Google Patents

Description

The present invention relates to an induction device for inducing a live fish to a hypopnea state.

As a method of transporting live fish, a method of transporting live fish in a state where it is allowed to swim while supplying air into the tank using a vehicle equipped with a tank containing water has been conventionally known.

In such a method of transporting live fish in water, it is necessary to transport water in addition to live fish, and the transport weight is large. For this reason, the amount of live fish that can be carried is small relative to the maximum load capacity of the vehicle, and the transportation efficiency is poor. It was. In addition, live fish may collide with the inner wall of the tank during transportation, damaging the fish body and reducing the commercial value.

In order to solve the above problems, an anhydrous transportation method for transporting live fish without water has been developed. When fish, which are exothermal animals, are acclimatized in low-temperature water, their body temperature also decreases, metabolism such as oxygen consumption is suppressed, and the exercise frequency and heart rate of the gills (ella) decrease. (Hereinafter referred to as "hypopnea"). Hypopnea fish can survive for a certain period of time even under anhydrous conditions where it is difficult for the gills to exchange oxygen and carbon dioxide, so they can be transported anhydrous alive. Therefore, various induction devices have been conventionally proposed for inducing a hypopnea state in fish.

In Patent Document 1, a stage in which marine organisms (such as leopard) are maintained in seawater for a predetermined time and a stage in which the temperature of the seawater is gradually lowered at predetermined intervals, and the temperature of the seawater is constant at each of the lowered stages. Starting from the stage where the time to maintain the temperature is gradually expanded by each of the lowered stages and the temperature of the seawater where there is no deviation in the average oxygen consumption consumed by the marine organism at a predetermined temperature, each of the lowered stages A method for inducing artificial hibernation of marine organisms is disclosed, which includes a step of gradually shortening the time for maintaining a constant seawater temperature for each step temperature according to the temperature of each step.

The induction device for inducing such artificial hibernation (hypopnea) includes a chamber (aquarium) for accommodating marine organisms (live fish) and seawater (water), and a pump (water supply) for supplying seawater (water) into the aquarium. A unit) and a cooler (cooling unit) that cools the seawater supplied from the pump into the chamber. According to this induction device, the live fish in the aquarium is guided to the hypopnea state by supplying the water cooled to the temperature required for inducing the hypopnea state by the cooling unit to the aquarium by the water supply unit. be able to.

Japanese Unexamined Patent Publication No. 2008-188008

However, the water tank of the induction device of Patent Document 1 is formed with a supply port for supplying water from the supply unit and a discharge port for discharging water from the inside of the water tank, and the supply port and the discharge port are inside the water tank. On the other hand, it opens in the same direction. Therefore, the flow of water in the water tank is partially stagnant, and the water temperature in the water tank cannot be controlled uniformly. Therefore, depending on the position of the live fish in the aquarium, it may not be possible to successfully induce the live fish into a hypopnea state.

In view of these points, when a water tank provided with a supply port and a discharge port is used at the position disclosed in Patent Document 1, in order to make the water temperature in the water tank uniform, the flow velocity of the supplied water is adjusted. Need to increase. However, when the flow velocity of the supplied water is increased, the flow velocity of the water flowing around the live fish increases considerably depending on the position, and it may be difficult to smoothly guide the live fish to a hypopnea state. Then, once the live fish move before becoming hypopnea, the live fish come into contact with each other, which not only hinders the induction of the hypopnea state of other live fish, but also may damage the live fish. ..

The present invention has been made in view of these points, and the present invention provides a hypopnea state induction device capable of more effectively inducing a live fish to a hypopnea state.

The present invention has been made in view of the above problems, and the present invention is a guiding device for inducing a live fish to a low breathing state. The guiding device includes a water tank for accommodating live fish and water, and water in the water tank. A water supply unit that supplies water, a cooling unit that cools the water supplied from the water supply unit into the aquarium, and a storage recess formed so that the head and tail of the live fish are housed in predetermined positions. The water tank is provided with a communication portion for communicating water in the water tank in a storage recess in a state of being arranged in the water tank, and a storage container in which the water in the water tank is immersed in the water. Has a supply port for supplying water into the water tank and a discharge port for discharging water from the water tank so that the water supplied from the water supply unit forms a swirling flow in the water tank. It is characterized by being arranged.

According to the present invention, a swirling flow can be formed in the water tank by the supply port for supplying water into the water tank and the discharge port for discharging water from the water tank. Then, in the live fish housed in the aquarium, the head and tail of the live fish are housed (restrained) in a predetermined position in the storage recess of the storage container, and the water tank is housed in the storage recess via a communication portion. The swirling water formed inside flows into the water.

As a result, the water temperature in the water tank is cooled by the cooling unit, and the water supplied from the water supply unit into the water tank can be made uniform by the swirling flow in the water tank. Then, the cooling unit allows water cooled to a predetermined temperature to flow to the live fish in the storage container, so that the live fish can be efficiently guided to a hypopnea state.

Further, since the water in the water tank flows through the communication portion formed in the storage container, the water having a flow velocity lower than the flow rate in the water tank can flow to the live fish in the storage container. As a result, the live fish can be smoothly guided to a hypopnea state. Further, even if the live fish moves before reaching the hypopnea state, the live fish will not come into contact with other live fish because they are housed in a predetermined posture in the storage container. As a result, the contact between the live fish does not hinder the induction of the hypopnea state of the other live fish, and the live fish is not damaged. Further, when the live fish is taken out from the aquarium, if the storage container is pulled up from the aquarium, the live fish can be taken out from the aquarium without directly touching the live fish.

In a more preferred embodiment, the communication portion of the storage container is formed on the head side communication portion formed on the head side of the live fish housed in the storage recess and on the tail side of the live fish housed in the storage recess. The storage container has at least a caudal communication portion, and the head side communication portion is located on the upstream side of the swirling flow, and the caudal communication portion is located on the downstream side of the swirling flow. It is arranged in the water tank so as to be located.

According to this aspect, the storage container is arranged in the water tank so that the cranial communication portion is located on the upstream side of the swirling flow and the caudal communication portion is located on the downstream side of the swirling flow. The water in the water tank flows into the accommodating recess from the cranial communication portion, and the water flowing into the accommodating recess is discharged from the caudal communication portion. As a result, since the water in the aquarium can flow from the head to the tail of the live fish in the storage container, the posture of the live fish can be maintained in a state close to nature, and the hypopnea state of the live fish can be maintained. Can promote induction to.

In a more preferred embodiment, the supply port is arranged at a position higher than the water surface of the water contained in the water tank so as to entrain air in the water contained in the water tank. According to this aspect, water is supplied from a position higher than the water surface of the water contained in the water tank, and air is entrained in the water contained in the water tank. As a result, the oxygen gas contained in the air can be supplied to the water in the aquarium.

In a more preferred embodiment, the induction device further includes a gas supply device that supplies oxygen gas to the center of the swirling flow. According to this aspect, by supplying the oxygen gas to the central portion of the swirling flow of water, the oxygen gas is flowed from the central portion to the outside of the swirling flow along the flow. As a result, oxygen gas can be uniformly supplied to the water in the water tank.

According to the present invention, live fish can be more effectively induced into a hypopnea state.

It is a schematic conceptual diagram of the induction device of the hypopnea state which concerns on this invention. It is an exploded perspective view of the storage container which constitutes the guidance device shown in FIG. It is an exploded perspective view for demonstrating the packing of flatfish by the tray of the storage container shown in FIG. It is a schematic perspective view of the tray shown in FIG. It is a top view for demonstrating the flow of water in the water tank of the guidance device shown in FIG. 1 and the arrangement state of flatfish.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5.

As shown in FIG. 1, the hypopnea state guidance device 1 according to the present embodiment is a device for guiding a live fish to a hypopnea state. The live fish that induces a hypopnea state is not limited to a specific species and may be a saltwater fish or a freshwater fish. Examples of saltwater fish include fish belonging to the family Flounder, fish belonging to the family Flatfish, fish belonging to the family Porgies, fish belonging to the family Serranidae, and fish belonging to the family Puffers. Examples of fish belonging to the family Flounder include flounder, flounder, flounder, flounder, flatfish, flounder and the like, and flounder (Paralichthys olivaceus) is particularly preferable. Examples of fish belonging to the flatfish family include yellow striped flounder, Styan's bulbul, black flounder, halibut, flatfish, pine flounder, and flatfish. Examples of fish belonging to the Thai family include red sea bream and black sea bream. Examples of fish belonging to the family Serranidae include Malabar grouper, Que, and Sawedged perch. Examples of fish belonging to the family Puffers include tiger puffer fish and puffer fish. Examples of freshwater fish include carp, crucian carp, eel, loach, and catfish.

Further, "water" in the present invention means water in which the target live fish can inhabit, and refers to seawater when the target live fish inhabits seawater, and freshwater when the target live fish inhabits. Point to. Well, the "oxygen gas" in the present invention includes not only a gas composed of only oxygen gas but also a gas containing nitrogen gas or the like in the oxygen gas. In this embodiment, flatfish F is given as an example of live fish. In this case, the "water" in the present invention is seawater W.

As shown in FIG. 1, the induction device 1 is supplied from the water tank 10 for accommodating the flatfish F and the seawater W, the water supply unit 20 for supplying water into the water tank 10, and the water supply unit 20 into the water tank 10. A cooling unit 30 for cooling water is provided. In FIG. 1, the storage container 40 for accommodating the flounder F and immersing it in the water tank 10, which is a part of the induction device 1, is omitted, and only the arrangement state of the flounder F is schematically shown. Further, in FIG. 5, the tray and the net material arranged on the upper side are omitted.

As shown in FIG. 1, the water tank 10 is a device for immersing the storage container 40, which will be described later, in seawater W. In the water tank 10, a pair of supply ports 11 and 11 for supplying water into the water tank 10 and a pair of supply ports 11 and 11 in the water tank 10 so that a swirling flow is formed in the seawater W supplied from the water supply unit 20. A pair of discharge ports 12, 12 for discharging seawater from the aquarium are arranged.

The pair of supply ports 11 and 11 are arranged diagonally to the internal space of the rectangular water tank 10 in a plan view, whereby the seawater W supplied from the water supply unit 20 in the water tank 10 in a plan view. However, a swirling flow is formed in the water tank 10.

Further, the pair of discharge ports 12 and 12 are arranged so as to open on the upstream side of the swirling flow in the vicinity of the pair of supply ports 11 and 11 of the water tank 10, and the water tank is more than the pair of supply ports 11 and 11. It is located at the bottom of 10. As a result, the dust and the like that have settled in the water tank 10 can be effectively discharged from the pair of discharge ports 12, 12.

The positions and numbers of the supply port 11 and the discharge port 12 are not particularly limited as long as a swirling flow can be formed in the seawater W in the water tank 10. For example, the discharge port 12 may be arranged in the center of the bottom of the water tank 10.

Further, in the present embodiment, each supply port 11 is arranged at a position higher than the water surface Wf of the seawater W housed in the water tank 10 so as to entrain air in the seawater housed in the water tank 10. As a result, the seawater W is supplied from a position higher than the water surface Wf of the seawater W contained in the water tank 10, and the air A is involved in the seawater W housed in the water tank 10. As a result, the oxygen gas contained in the air A can be supplied to the water in the water tank.

Further, in the present embodiment, the induction device 1 further includes a gas supply device 80 for supplying oxygen gas to the central portion of the swirling flow of the seawater W. The gas supply device 80 includes a supply source 81 for supplying oxygen gas, and a nozzle 82 for discharging oxygen gas G from the supply source 81 at the center of a swirling flow of seawater W in the center of the water tank 10. When the oxygen gas G is supplied to the central portion of the swirling flow of the seawater W, the oxygen gas is flowed from the central portion to the outside along the swirling flow of the seawater W. As a result, the oxygen gas can be uniformly dispersed by the seawater W in the water tank 10.

The water supply unit 20 is a device for supplying seawater W into the water tank 10, and in the present embodiment, the water supply unit 20 is connected to the water tank 10 via a pipe so as to circulate the seawater W in the water tank 10. The water supply unit 20 includes a pump 21, a temperature sensor 22 that measures the temperature of the seawater discharged from the pump 21, and a strainer 23 that collects the waste of the seawater W discharged from the water tank 10. In the present embodiment, the measurement signal measured by the temperature sensor 22 is input to the control device 36 of the cooling unit 30, which will be described later.

Further, a flow meter 23A is arranged downstream of the temperature sensor 22. Specifically, the flow meter 23A is arranged on the upstream side of the branch portion 25 where seawater is branched into the two supply ports 11, and the flow meter 23B is also arranged on the upstream side of each supply port 11. .. A flow rate adjusting valve 24 is connected downstream of each flow meter 23B, and while checking these flow meters 23A and 23B, the flow rate of the seawater W supplied to the water tank 10 is measured by the flow rate adjusting valves 24 and 24. Can be adjusted. The flow meter 23A is preferably arranged, but may not be arranged.

The cooling unit 30 is a device for cooling the seawater W supplied from the water supply unit 20 into the water tank 10, a cooling device (chiller) 31 for cooling the refrigerant, a pump 32 for supplying the refrigerant to the cooling device 31, and a pump 32. It is connected to the suction side of the pump 32 and includes a tank 33 for accommodating the refrigerant. Further, the cooling unit 30 includes a three-way valve 34 and a heat exchanger 35, which will be described later.

A three-way valve 34 is connected downstream of the cooling device 31, and one path connected to the three-way valve 34 is connected to the tank 33 via a heat exchanger 35 and is connected to the three-way valve 34. The other path is directly connected to the tank 33. The heat exchanger 35 is a generally known heat exchanger, which is configured to absorb the heat of the seawater W of the water supply unit 20 into the refrigerant flowing from the cooling device 31 to cool the seawater. ..

The cooling unit 30 further includes a control device 36, which electrically supplies the pump 21, the temperature sensor 22, the cooling device 31, the pump 32, the three-way valve 34, and the tank 33, respectively. It is connected to the. The control device 36 controls the cooling device 31 based on the measurement signal from the temperature sensor 22, cools the refrigerant so that the seawater W is cooled to a predetermined temperature, and controls the three-way valve 34. A cooled refrigerant is supplied to the heat exchanger 35. When the seawater W has a predetermined temperature, the control device 36 controls the three-way valve 34 and sends the refrigerant directly to the tank 33.

As shown in FIGS. 2 and 5, the induction device 1 includes four storage containers 40 for containing the flatfish F, and the storage containers 40 are immersed in the seawater W in the water tank 10. In the present embodiment, the storage container 40 includes a pair of trays 60, 60 for accommodating the flatfish F, a net cage 71 for accommodating the trays 60, 60, and a net material 72 for covering the opening of the net cage 71. There is.

A cushion material 69 is placed on the lower tray 60. In the present embodiment, the cushion material 69 is placed only on the lower tray 60, but for example, the cushion material may be further arranged between the upper tray 60 and the flatfish F. The thickness of the cushion material is preferably 2 to 20 mm, and examples of the material thereof include polyurethane-based resin foam sheets, polystyrene-based resin foam sheets, polyethylene-based resin foam sheets, and polypropylene-based resin foam sheets. ..

In the present embodiment, the pair of trays 60 and 60 have the same shape, and as shown in FIG. 3, the storage recess 61 formed so that the head and tail of the flatfish F are housed in a predetermined position. Communication portions 68a to 68c are formed in which the seawater W in the water tank 10 communicates with the accommodating recess 61 in a state of being arranged in the water tank 10.

Specifically, the tray 60 is formed with two accommodating recesses 61 according to the shape of the flatfish F by the bottom plate portion 63 and the side wall portion 64 erected from the peripheral edge of the bottom plate portion 63. On the bottom plate portion 63, a head mounting portion 63a on which the head Fa of the flatfish F is placed, a body mounting portion 63b on which the body portion Fb of the flatfish F is placed, and a tail Fc of the flatfish F are placed. It has a tail mounting portion 63c.

Further, the tray 60 does not have a side wall portion 64 formed at a position where the head Fa of the flounder F, the body Fb of the flounder, and the tail Fc of the flounder F are accommodated, and this portion communicates as described above. It is a department. Specifically, the communication portion is formed on the head side communication portion 68a formed on the head Fa side of the flatfish F housed in the storage recess 61 and on the body portion Fb side of the flatfish housed in the storage recess 61. It has a trunk-side communication portion 68b and a caudal-side communication portion 68c formed on the tail Fc side of the flatfish F.

Further, the bottom plate portion 63 is formed with two recessed portions 65 from the center of the body mounting portion 63b of the flatfish F toward the head mounting portion 63a. A through hole 66 is formed in the recessed portion 65 so that the seawater W accumulated in the accommodating recessed portion 61 can be drained and the gills of the flatfish F can be moved.

The side wall portion 64 is formed with a protruding portion 64a in the direction in which the side wall portion 64 rises. As a result, the seawater W can easily flow into the communication portions 68a to 68c in a state where the protruding portions 64a of the upper and lower trays 60 and 60 are overlapped (see FIG. 2). Further, the height of the trays 60 and 60 in a stacked state is substantially the same as the height of the internal space formed by the net cage 71 and the net material 72, whereby in the net cage 71, It is possible to prevent the tray 60 from floating.

As shown in FIG. 3, the tray 60 (see the upper tray 60) is formed with reinforcing ribs 67 on the opposite side of the accommodating recess 61. Specifically, the rib 67 is formed at a position corresponding to the side wall portion 64 and the recessed portion 65. By providing such a rib 67, the strength of the tray 60 can be strengthened.

The net cage (accommodation basket) 71 has an internal space capable of accommodating the tray 60, and a plurality of holes are formed in the wall portion 71a of the net cage 71. As a result, the seawater W in the water tank can be supplied to the net cage 71 and discharged. In the present embodiment, such a net basket 71 is used, but if the seawater W can flow inside the basket 71 and the tray 60 in which the flatfish F is packed can be accommodated, the tray 60 can be accommodated. The structure is not particularly limited.

The material of the tray 60 is preferably a heat insulating material from the viewpoint of heat retention and temperature control. As the heat insulating material, a heat insulating plastics material is preferable, and a foamed plastics material is more preferable. Examples of the foamed plastics material include polystyrene-based resin foams, polyethylene-based resin foams, polypropylene-based resin foams, polyurethane-based resin foams, polyester-based resin foams, and the like. The foaming multiple of the foamed plastic material is preferably 10 to 100 times (density: 0.01 g / cm ^{3 to} 0.1 g / cm ^3).

The net cage 71 is made of, for example, a non-foamable resin material (polystyrene resin, polyethylene resin, polypropylene resin, etc.). The net material 72 is made of a metal material.

As shown in FIG. 5, in the storage container 40 configured in this way, the head side communication portion 68a is located on the upstream side of the swirling flow, and the caudal communication portion 68c is located on the downstream side of the swirling flow. It is arranged in the water tank 10.

A method of inducing flatfish F to a hypopnea state will be described using the induction device 1 described above. Specifically, first, seawater W is put into the water tank 10, the pump 21 of the water supply unit 20 is driven, and the water is supplied into the water tank 10 by the flow rate adjusting valve 24 while checking the flow meters 23A and 23B. The flow rate of seawater is adjusted to circulate the seawater W. As a result, a swirling flow is formed in the seawater W in the water tank 10. In addition, unnecessary waste is collected by the strainer 23.

Next, the control device 36 of the cooling unit 30 controls the three-way valve 34 so that the temperature supplied to the water tank 10 becomes the storage temperature at which the flatfish F is stored based on the measurement signal of the temperature sensor 22. .. As a result, the heat of the seawater W is absorbed by the refrigerant cooled by the cooling device 31 via the heat exchanger 35, and the seawater W at the storage temperature can be supplied.

Next, as shown in FIG. 2, the flatfish F is put into the net cage 71 in a state of being housed in the trays 60 and 60, and the net cage 71 is further covered with the net material 72. As a result, the obtained storage container 40 is placed in the water tank 10. At this time, four storage containers 40 are placed in the seawater W in the water tank 10 so that the cranial communication portion 68a is located on the upstream side of the swirling flow and the caudal communication portion 68c is located on the downstream side of the swirling flow. Soak. A weight may be placed on the storage container 40 so that the storage container 40 does not float in the water tank 10.

Further, the control device 36 of the cooling unit 30 controls the three-way valve 34 so that the temperature supplied to the water tank 10 becomes the acclimatization temperature at which the flutter F is in a hypopnea state based on the measurement signal of the temperature sensor 22. To do. As a result, the refrigerant cooled by the cooling device 31 is cooled by the heat exchanger 35, and the seawater W at the acclimatization temperature can be supplied. As a result, flounder F can be induced into a hypopnea state.

According to the embodiment, a swirling flow can be formed in the water tank 10 by the supply port 11 for supplying seawater W into the water tank 10 and the discharge port 12 for discharging water from the water tank 10. Then, in the flatfish F housed in the water tank 10, the head Fa and the tail Fc of the flatfish F are housed in predetermined positions in the storage recess 61 of the tray 60 of the storage container 40, and the flatfish F is housed in the storage recess 61. , The swirling water formed in the water tank 10 flows through the communication portions 68a to 68c.

As a result, the water temperature in the water tank 10 is cooled by the cooling unit 30, and the water temperature of the seawater supplied from the water supply unit 20 into the water tank 10 can be made uniform by the swirling flow in the water tank 10. Then, since the seawater W cooled to the acclimatization temperature can be flowed to the flounder F in the storage container 40 by the cooling unit 30, the flounder F can be efficiently guided to a hypopnea state.

Further, since the seawater W in the water tank 10 flows into the storage container 40 through the communication portions 68a to 68c formed in the tray 60 of the storage container 40, the side wall portion 64 of the tray 60, the net cage 71, and the like flow into the seawater W. Seawater W having a flow velocity lower than the flow velocity in the water tank 10 can flow to the live fish in the storage container 40 as a resistance to the flow of the seawater. As a result, the flounder F is easily induced into a hypopnea state.

In particular, the storage container 40 is arranged in the water tank 10 so that the head side communication portion 68a is located on the upstream side of the swirling flow and the caudal communication portion 68c is located on the downstream side of the swirling flow. The seawater W in the water tank 10 flows into the accommodating recess 61 from the cranial communication portion 68a, and the seawater W flowing into the accommodating recess 61 is discharged from the caudal communication portion 68c. As a result, the seawater W in the water tank 10 can flow from the head Fa of the flounder F toward the tail Fc in the storage container 40 with a water flow close to nature, so that the flounder F is guided to a hypopnea state. Can be promoted.

Further, even if the flounder F moves before reaching the hypopnea state, the flounder F does not come into contact with other flounders F because it is housed in a predetermined posture in the storage container 40. As a result, the contact between the flounders F does not hinder the induction of the hypopnea state of the other flounders F, and the flounders F are not damaged. Further, when the flounder F is taken out from the water tank 10, if the storage container 40 is pulled up from the water tank 10, the flounder F can be taken out from the water tank 10 without directly touching the flatfish F.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs are designed without departing from the spirit of the present invention described in the claims. You can make changes.

In the present embodiment, two flounders are housed side by side in one net cage. For example, trays may be further stacked in the vertical direction in one net cage, and the storage containers are vertically stored in the water tank. It may be stacked in multiple stages.

1: Induction device, 10: Water tank 10: Supply port, 12: Discharge port, 20: Water supply part, 30: Cooling device, 40: Storage container, 60: Tray, 68a: Head side communication part (communication part), 68c : Caudal communication part, 80 gas supply device, F: Flounder (live fish), W: Seawater (water)

Claims (4)

It is a guidance device for guiding live fish to a hypopnea state.
The guidance device includes a water tank for accommodating live fish and water, and
A water supply unit that supplies water into the aquarium,
A cooling unit that cools the water supplied from the water supply unit into the water tank,
A storage recess formed so that the head and tail of the live fish are housed in a predetermined position, and a communication part in which water in the water tank communicates with the storage recess while being arranged in the water tank. It comprises a storage container that is formed and immersed in the water in the aquarium.
In the water tank, a supply port for supplying water into the water tank and a discharge port for discharging water from the water tank so that the water supplied from the water supply unit forms a swirling flow in the water tank. An inducing device for hypopnea, characterized in that an outlet is located. The communication portion of the storage container includes a head-side communication portion formed on the head side of the live fish housed in the storage recess and a caudal communication portion formed on the tail side of the live fish housed in the storage recess. And have at least
The storage container is arranged in the water tank so that the cranial communication portion is located on the upstream side of the swirling flow and the caudal communication portion is located on the downstream side of the swirling flow. The induction device for a hypopnea state according to claim 1. According to claim 1 or 2, the supply port is arranged at a position higher than the water surface of the water contained in the water tank so as to entrain air in the water contained in the water tank. The hypopnea induction device described. The guidance device for a hypopnea state according to any one of claims 1 to 3, wherein the guidance device further includes a gas supply device for supplying oxygen gas at the center of the swirling flow.

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