JP7156965B2 - Hypoxic air supply device and training device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a low-oxygen air supply apparatus that uses air as a raw material to generate low-oxygen air having an oxygen concentration lower than that of outside air and supplies the low-oxygen air to other equipment. The present invention also relates to a training device capable of performing simulated high altitude training.

A training apparatus is known that artificially creates an environment different from a normal indoor environment or a normal outdoor environment and performs training under the environment. For example, by creating a hypoxic environment simulating high altitude and training in it, endurance enhancement and cardiopulmonary function can be improved.
The hypoxic room disclosed in Patent Literature 1 allows training in an artificially created hypoxic environment.

Further, Patent Document 2 discloses an air supply device having a first special environment chamber with a high oxygen concentration and a second special environment chamber with a low oxygen concentration.
FIG. 4 of Patent Document 2 discloses a configuration for switching between a high oxygen concentration environment and a low oxygen concentration environment in one special environment room.

Japanese Patent No. 4721150 JP 2018-29750 A

As a measure to create a low-oxygen environment in the training room, for example, there is a method of using a polymer separation membrane type feed air generator. The polymer separation membrane type feed air generator is often used as a device to generate nitrogen gas, and oxygen is separated by pressurizing air with a compressor or the like and introducing the pressurized air. and produces a gas with a higher percentage of nitrogen than the outside air.
Here, the low-oxygen air generated by the source air generator may have too low an oxygen concentration for high-altitude training, and may be supplied to the training room after adjusting the oxygen concentration by mixing in outside air.

As measures for adjusting the oxygen concentration, the method of the piping system diagram shown in FIG. 7 and the method of the piping system diagram shown in FIG. 8 are conceivable.
The measure shown in FIG. 7 is a method of taking outside air with a separate blower or the like and mixing the outside air with the low-oxygen air (hereinafter sometimes referred to as low-oxygen raw air) generated by the raw air generator.

The measure shown in FIG. 8 is a method of branching the flow path that is pressurized by an air compressor and introduced into the feed air generator, and mixing the air flowing through the branch flow path into the low-oxygen feed air generated by the feed air generator. is. That is, the measure shown in FIG. 8 is to branch the air after being pressurized by the compressor and introduce it into the secondary side passage of the feed air generator.

The former measure of using a separate blower requires installation of the blower separately from the air compressor. In addition, this measure requires duct piping to take in outside air.
Therefore, this measure often results in a large system including a training room.

The latter measure of branching the primary side flow path of the raw air generating device to flow air to the secondary side of the raw air generating device is to combine both the air introduced into the raw air generating device and the air introduced into the secondary side. Since it is supplied by a single air compressor, the load on the air compressor may increase.
Therefore, a large air compressor must be used, and the system including the training room may become large.

In the air supply device disclosed in Patent Document 2, a measure is adopted in which the primary side flow path introduced into the latter raw air generating device is branched to flow air to the secondary side of the raw air generating device.
In the air supply device disclosed in FIG. 4 of Patent Document 2, when the special environment chamber is to have a low oxygen concentration, outside air branched from the primary side flow path is introduced to the secondary side of the source air generation device.
In the air supply device of Patent Document 2, low-oxygen feed air and high-oxygen air having a high oxygen concentration generated by the feed air generator (hereinafter sometimes referred to as high-oxygen feed air) are simultaneously supplied into the special environment chamber. will not be

SUMMARY OF THE INVENTION An object of the present invention is to provide a low-oxygen air supply apparatus that can be made more compact than the conventional one, paying attention to the above-described problems of the prior art.
Another object of the present invention is to provide a training apparatus capable of miniaturizing a hypoxic air supply apparatus attached to a training room as compared with the prior art.

An aspect for solving the above-described problems is a low-oxygen air supply device that supplies low-oxygen air having an oxygen concentration lower than that of the outside air, comprising a source air generation device and a mixing unit, wherein the source air generation device is air are used as raw materials to generate low-oxygen raw air having a lower oxygen concentration than the outside air and high-oxygen raw air having a higher oxygen concentration than the outside air. The low-oxygen air supply device is characterized in that it mixes oxygen source air to generate low-oxygen mixed air having an oxygen concentration lower than that of the outside air.
A specific mode for solving the above-described problems is a low-oxygen air supply device that supplies low-oxygen air having an oxygen concentration lower than that of the outside air, which includes a raw air generation device and a mixing unit, wherein the raw air generation device uses air as a raw material to generate low-oxygen raw air having a lower oxygen concentration than the outside air and high-oxygen raw air having a higher oxygen concentration than the outside air. and a second discharge unit for discharging the high-oxygen raw air, and the mixing unit mixes the high-oxygen raw air with the low-oxygen raw air to produce the outside air It is arranged in the high-oxygen air flow path from the second discharge part of the raw air generation device to the mixing part and the high-oxygen air flow path an exhaust passage for exhausting surplus oxygen-enriched feed air; and an exhaust flow rate control means for controlling the flow rate of the oxygen-enriched feed air introduced into the mixing section. 1. A hypoxic air supply apparatus, wherein said exhaust gas flow rate control means is adjusted in inverse proportion to said mixture flow rate control means.

The low-oxygen air supply device of this embodiment mixes the low-oxygen raw air produced by the raw air generator with the high-oxygen raw air produced by the raw air generator to adjust the oxygen concentration.
Therefore, the burden on upstream devices such as an air compressor for supplying raw air to the raw air generator is small. Therefore, upstream devices such as an air compressor can be downsized.
Further, in the low-oxygen air supply device of this aspect, there is no need to provide a blower, an air compressor, etc., in addition to the device for supplying raw air to the raw air generator.
Therefore, the low-oxygen air supply device of this aspect can be made smaller than the conventional one.

In the above aspect, the feed air generator has an air inlet, a first discharge section for discharging the low-oxygen feed air, and a second discharge section for discharging the high-oxygen feed air, and the feed air An oxygen-enriched air flow path from the second discharge section of the generating device to the mixing section is provided, and the oxygen-enriched air flow path has a flow rate control means, and the flow rate of the oxygen-rich feed air introduced into the mixing section. is controlled , and it is desirable to provide an exhaust path for exhausting excess oxygen-rich feed air.

In the low-oxygen air supply device of this aspect, the high-oxygen air flow path has a flow control means for controlling the flow rate of the high-oxygen raw air introduced into the mixing section. Therefore, the oxygen concentration of the low-oxygen mixed air can be adjusted.
Since the low-oxygen air supply apparatus of this embodiment generates low-oxygen mixed air having a smaller amount of oxygen than the raw material air, only part of the high-oxygen raw air is mixed with the low-oxygen raw air. In the low-oxygen air supply device of this aspect, the surplus high-oxygen raw air is exhausted from the exhaust passage, so that it does not adversely affect the raw air generator.

In each aspect described above, it is desirable that the mixing section is configured by a pipeline.

According to this aspect, the low-oxygen air supply device can be made more compact.

In each aspect described above, the feed air generator has a gas separation membrane capable of separating nitrogen and oxygen, and the gas separation membrane separates the air into the low-oxygen feed air and the high-oxygen feed air. It is desirable to be

An air generator that employs a gas separation membrane can efficiently separate oxygen and nitrogen in spite of its small size.
Therefore, according to this aspect, the low-oxygen air supply device can be made more compact.

In each aspect described above, the raw air generator may have an adsorbent having a high adsorption capacity for a specific gas.
That is, in each of the above-described embodiments, the feed air generator includes an adsorbent having a high adsorption capacity for a specific gas, and separates the air into the low-oxygen feed air and the high-oxygen feed air by the PSA mechanism. can be anything.

This aspect is also suitable as a large-capacity low-oxygen air supply device.

In each of the above embodiments, it is desirable to have a carbon dioxide remover for removing carbon dioxide from the oxygen-enriched feed air.

According to this aspect, the carbon dioxide contained in the high-oxygen feed air can be reduced in advance, and the carbon dioxide concentration of the generated low-oxygen mixed air can be reduced.

An embodiment of the training apparatus has a training room in which a person can exercise, and any of the hypoxic air supply devices described above , wherein the training room is made into a hypoxic environment with a lower oxygen concentration than the outside air. The training device is characterized in that it is possible to

According to this aspect, the hypoxic air supply device attached to the training room can be miniaturized.

According to the present invention, it is possible to reduce the size of the low-oxygen air supply device as compared with the conventional one. Further, according to the present invention, the training device can be made smaller than the conventional one.

1 is a perspective view of a training device according to an embodiment of the invention; FIG. FIG. 2 is a configuration diagram of the training device of FIG. 1; FIG. 2 is a cross-sectional view of a source air generator employed in the hypoxic air supply device of the training device of FIG. 1; FIG. 4 is a configuration diagram of a training device according to another embodiment of the present invention; FIG. 11 is a configuration diagram of a training device according to still another embodiment of the present invention; FIG. 11 is a configuration diagram of a training device according to still another embodiment of the present invention; 1 is a block diagram of a prior art training device; FIG. 1 is a block diagram of another prior art training device; FIG.

Embodiments of the present invention will be further described below.
The training apparatus 1 of this embodiment has two training rooms 2 a and 2 b and one hypoxic air supply device 3 .
The two training rooms 2a and 2b have the same structure. The training rooms 2a and 2b are rooms having a volume sufficient for several people to exercise. The training rooms 2a and 2b employed in this embodiment can arbitrarily adjust the internal environment.

Specifically, the temperature and humidity in the training rooms 2a and 2b can be adjusted. Especially in this embodiment, the oxygen concentration in the training rooms 2a and 2b can be arbitrarily adjusted.
That is, as shown in FIG. 1, the training rooms 2a and 2b have a temperature sensor 11, a humidity sensor 12, a first oxygen concentration sensor 13, and a second oxygen concentration sensor 15. FIG.
The first oxygen concentration sensor 13 is used for controlling the oxygen concentration in the training rooms 2a and 2b, and for convenience of explanation, is called an "indoor oxygen concentration monitoring sensor 13".
The second oxygen concentration sensor 15 monitors whether the oxygen concentration in the training room 2 has decreased excessively, and for the convenience of explanation, is referred to as the "minimum oxygen concentration monitoring sensor 15".

A ventilator 16 is provided in the training rooms 2a and 2b. A carbon dioxide concentration sensor 17 is provided downstream of the ventilator 16 .

In the training rooms 2a and 2b, there is a known air conditioner 20. Signals from the temperature sensor 11 and the humidity sensor 12 are input to the air conditioner 20, and the temperature and humidity in the training rooms 2a and 2b are adjusted to the desired environment. Air conditioner 20 is controlled.

In the training apparatus 1 of this embodiment, there is one low-oxygen air supply device 3, and low-oxygen air is supplied to the two training rooms 2a and 2b by the one low-oxygen air supply device 3. FIG.
As will be described later, low-oxygen air with a reduced oxygen concentration is generated by the feed air generator 26 of the low-oxygen air supply device 3, and then air with a high oxygen content is mixed to adjust the oxygen concentration. , the mixed air is hypoxic air with a lower oxygen concentration than the outside air.
In order to distinguish between the two types of low-oxygen air having different oxygen concentrations, the low-oxygen air generated by the source air generator 26 is referred to as "low-oxygen source air", and the low-oxygen air after mixing is referred to as "low-oxygen mixed air". called.

The low-oxygen air supply device 3 has an air compressor 25 and a raw air generator 26 as shown in FIG.
The feed air generator 26 is a known polymer separation membrane type nitrogen gas generator, which separates oxygen by introducing air pressurized by the air compressor 25, and reduces the ratio of nitrogen to the introduced air. low-oxygen feed air with a high oxygen content and high-oxygen feed air with a high percentage of oxygen compared to the introduced air.

2 and 3, the feed air generator 26 has an air inlet 30, a first discharge section 31 for discharging low-oxygen feed air, and a second discharge section 32 for discharging high-oxygen feed air. is doing.
A specific structure of the low-oxygen air supply device 3 will be described later.

As described above, the training apparatus 1 supplies low-oxygen mixed air to the two training rooms 2a and 2b from one low-oxygen air supply device 3, and the pipes are branched into two systems from the middle. , the configuration of the branch piping is the same. Therefore, the flow path from the air compressor 25 to one training room 2a will be described as a representative.
In FIG. 2, the thick line indicates the flow path leading to the first training room 2a, and the thin line indicates the flow path leading to the second training room 2b.

In the low-oxygen air supply device 3, the main flow path 23 enters the raw air generator 26 from the air compressor 25 and extends from the first discharge section 31 of the raw air generator 26 to the first training room 2a via the mixing section 33a. It has an oxygen-enriched air flow path 36 from the second discharge section 32 of the generator 26 to the mixing section 33a. The mixing section 33a is a confluence section of the main flow path 23 and the high-oxygen air flow path 36 and a pipe line on the downstream side thereof.

The main flow path 23 includes a raw air introduction path 37 connecting the air compressor 25 and the air introduction port 30 of the raw air generator 26, and a low-concentration oxygen flow path 38 leading from the first discharge section 31 of the raw air generator 26 to the training room 2a. It is composed by
Further , in the low-concentration oxygen flow path 38, an oxygen concentration sensor 41 is provided between the first discharge section 31 and the mixing section 33a. The oxygen concentration sensor 41 monitors the oxygen concentration of the low-oxygen raw air produced by the raw air producing device 26, and is referred to as a "low-oxygen concentration monitoring sensor 41" for convenience of explanation.

The oxygen-rich air flow path 36 is a flow path from the second discharge section 32 of the raw air generator 26 to the mixing section 33a, as described above. The high-oxygen air flow path 36 is provided with a mixture flow rate control means 42a. The mixing flow rate control means 42a is specifically a motor valve, and the degree of opening can be adjusted.
An oxygen concentration sensor 43 is provided in the high-oxygen air flow path 36 . The oxygen concentration sensor 43 monitors the oxygen concentration of the high-oxygen raw air produced by the raw air producing device 26, and is referred to as a "high oxygen concentration monitoring sensor 43" for convenience of explanation.

The oxygen-rich air channel 36 is further provided with an exhaust channel (exhaust channel) 45 . The exhaust flow path 45 is connected to the second exhaust section 32 of the raw air generating device 26, and exhausts surplus high-oxygen raw air.
An exhaust flow control means 46 is provided in the exhaust flow path 45 . The exhaust flow rate control means 46 is specifically a motor valve, and its opening can be adjusted.

Since the piping system leading to the second training room 2b is the same as the piping system leading to the first training room 2a, the same numbers are assigned to the same members, and a reference number b is assigned to distinguish between the two. Duplicate description is omitted.

Next, functions of the training device 1 and the hypoxic air supply device 3 will be described.
Prior to using the training apparatus 1, the oxygen concentration in each training room 2a, 2b is set in a control device (not shown).
In the low-oxygen air supply device 3 , the air pressurized by the air compressor 25 is introduced into the air introduction port 30 of the raw air generation device 26 via the raw air introduction passage 37 .
Oxygen and nitrogen are separated inside the raw air generator 26 , and low-oxygen raw air having an oxygen concentration of about 8% is discharged from the first discharge section 31 .
Further, from the second discharge portion 32, high oxygen feed air having an oxygen concentration of about 38% is discharged.

That is, the oxygen ratio in the atmosphere is about 21%, but the low-oxygen raw air whose oxygen ratio has been reduced to about 8% by passing through the raw air generator 26 is discharged from the first discharge section 31, and the oxygen concentration is reduced to about 8%. Oxygen-enriched feed air with an increase of about 38% is discharged from the second discharge section 32 .

The oxygen concentration of the low-oxygen feed air is detected by a low-oxygen concentration monitoring sensor 41 and input to a control device (not shown). Similarly, the oxygen concentration of the high-oxygen feed air is detected by a high-oxygen concentration monitoring sensor 43 and input to a control device (not shown).
In the present embodiment, the oxygen concentration of the low-oxygen raw air discharged from the raw air generator 26 and the oxygen concentration of the high-oxygen raw air discharged from the raw air generator 26 are stabilized at approximately the above-described levels. The amount and pressure of the air introduced into the generating device 26 are adjusted by a control valve or the like (not shown).

In the low-oxygen air supply device 3 of the present embodiment, the low-oxygen raw air flowing through the main flow passage 23 is mixed with the high-oxygen raw air generated by the raw air generation device 26 passing through the high-oxygen air flow passage 36 to obtain an appropriate amount of air. low-oxygen mixed air adjusted to have an oxygen concentration of 100° C. is produced and supplied to each of the training rooms 2a and 2b.

The opening degrees of the mixing flow control means 42a, 42b are controlled so that the oxygen concentration in each training room 2a, 2b becomes the set value.
Specifically, the indoor oxygen concentration monitoring sensor 13 monitors the oxygen concentration in each training room 2a, 2b, and feeds back the value to the mixing flow control means 42a, 42b.
If the oxygen concentration in the training room 2a is lower than the set value, the degree of opening of the mixing flow rate control means 42a is increased to mix more high-oxygen raw air into the low-oxygen raw air flowing through the main flow path 23, resulting in low-oxygen raw air. The oxygen concentration in the mixed air is increased and supplied to the training room 2a to increase the oxygen concentration in the training room 2a.
If the oxygen concentration in the training room 2b is lower than the set value, the opening degree of the mixture flow control means 42b is opened.

Conversely, when the oxygen concentration in each training room 2a, 2b is higher than the set value, the opening degree of the mixing flow rate control means 42a, 42b is reduced to reduce the mixing amount of the high-oxygen feed air to be included in the low-oxygen mixed air. The oxygen concentration in the training rooms 2a and 2b is lowered, and the oxygen concentration in the training rooms 2a and 2b is lowered.

Further, the opening degree of the exhaust gas flow rate control means 46 is adjusted in inverse proportion to the opening degrees of the mixing flow rate control means 42a and 42b. That is, when the opening degrees of the mixing flow rate control means 42a and 42b change in the opening direction, the opening degrees of the exhaust flow rate control means 46 change in the closing direction, and when the opening degrees of the mixing flow rate control means 42a and 42b change in the closing direction, The opening degree of the exhaust gas flow rate control means 46 is increased.
As a result, excess high-oxygen raw air is appropriately exhausted from the exhaust passage 45, and the back pressure applied to the inside of the raw air generating device 26 is appropriately controlled.

The high-oxygen raw air mixed in the mixing units 33a, 33b is mixed with the low-oxygen raw air while passing through the pipes from the mixing units 33a, 33b to the training rooms 2a, 2b, and the low-oxygen raw air is reduced to a substantially uniform concentration. It becomes oxygen-mixed air and enters the training rooms 2a and 2b.

In the training apparatus 1 of the present embodiment, the inside of the training rooms 2a and 2b can be hypoxic to artificially create an environment equivalent to a high altitude, for example, an altitude of 2000m to 6000m.
In this embodiment, training machines 47 such as treadmills (running machines) are installed in the training rooms 2a and 2b.
A user can enter the training rooms 2a and 2b, use the training machine 47 in a hypoxic environment, and perform pseudo-high altitude training.

A carbon dioxide concentration sensor 17 monitors the carbon dioxide concentrations in the training rooms 2a and 2b. When the concentration of carbon dioxide in the training rooms 2a and 2b rises excessively, the mixing flow rate control means 42a and 42b are opened to mix more high-oxygen raw air into the low-oxygen raw air flowing through the main flow path 23. Then, the oxygen concentration in the low-oxygen mixed air is increased to increase the oxygen concentration in the training rooms 2a and 2b.

The oxygen concentrations in the training rooms 2a and 2b are also monitored by the minimum oxygen concentration monitoring sensor 15. The minimum oxygen concentration monitoring sensor 15 is one of the safety devices, and if for some reason the oxygen concentration in the training rooms 2a, 2b drops to a level that may be harmful to health, it will be notified by a notification means (not shown).
When the minimum oxygen concentration monitoring sensor 15 detects that the oxygen concentration in the training rooms 2a and 2b has decreased excessively, the hypoxic air supply device 3 is stopped and the ventilation device 16 is driven to ensure safety. The oxygen concentration in the training room 2 may be returned to atmospheric conditions.

In this embodiment, the high-oxygen raw air and the low-oxygen raw air are mixed in the pipeline, but a mixing section having a larger volume may be provided and the high-oxygen raw air and the low-oxygen raw air may be introduced into the mixing section. .
Alternatively, the high-oxygen raw air and the low-oxygen raw air may be individually introduced into the training rooms 2a and 2b, and the high-oxygen raw air and the low-oxygen raw air may be mixed in the training rooms 2a and 2b. That is, the training rooms 2a and 2b may be used as a mixing section.

In the embodiment described above, the high-oxygen air flow path 36 and the exhaust flow path 45 are provided with the mixed flow control means 42a, 42b and the exhaust flow control means 46, and the high-oxygen raw air produced by the raw air production device 26 is used as the main stream. They were divided into those to be mixed in the passage 23 and those to be exhausted.
As another measure, a damper (flow rate control means) whose opening degree can be adjusted is provided at the branch of the high-oxygen air flow path 36 and the exhaust flow path 45, and the high-oxygen raw air is mixed into the main flow path 23 and exhausted. You can allocate it to what you do.

In the above-described embodiment, the low-oxygen mixed air is supplied from the low-oxygen air supply device 3 to the training rooms 2a and 2b, but the low-oxygen mixed air may be supplied to only one training room 2. , more training rooms 2 may be supplied with hypoxic mixed air.
In the embodiment described above, the low-oxygen mixed air is supplied to the training rooms 2a and 2b as an example of using the low-oxygen air supply device 3, but the supply destination of the low-oxygen mixed air is limited to the training rooms 2a and 2b. not a thing For example, a suction mask or test device may be supplied with a hypoxic air mixture.

The low-oxygen air supply device 3 of the present embodiment uses a pressurizing device such as an air compressor 25 as an air introduction device to introduce air into the raw air generation device 26 . In the low-oxygen air supply device 3 of this embodiment, the amount of air required by the source air generation device 26 is sufficient for the air supply capacity required of the air compressor 25, and there is no need to pressurize the air for mixing. Therefore, a small capacity of the air compressor 25 is sufficient.
In the low-oxygen air supply device 3 of this embodiment, there is no need to install a separate air compressor or the like.
Therefore, the low-oxygen air supply device 3 of this embodiment can be made smaller than a conventional device having a capacity of the same scale.

Next, a supplementary description of the structure of the raw air generator 26 will be given with reference to FIG.
The raw air generator 26 incorporates a gas separation membrane 51 and is also used as a nitrogen gas generator.
The source air generator 26 has a container-shaped main body 50 in which a plurality of pipelines 53 made of gas separation membranes 51 are built.
A pair of support portions 52 are arranged spaced apart from each other in the internal space of the body portion 50 , and the pipe line 53 is supported by the pair of support portions 52 . Further, the body portion 50 is provided with an air inlet 30, a first discharge portion 31 for discharging low-oxygen raw air, and a second discharge portion 32 for discharging high-oxygen raw air.
The air inlet 30 of the main body 50 is connected to a conduit 53, and the air introduced into the main body 50 flows through the conduit 53, during which it is separated into high-oxygen raw air and low-oxygen raw air.

The gas separation membrane 51 is a separation membrane capable of separating nitrogen and oxygen from air, and an organic membrane using a polymer and an inorganic membrane using an inorganic material are known.
In this embodiment, a polymeric organic film is employed. Since the types and principles of gas separation membranes are well known, detailed description thereof will be omitted.

In the above-described embodiment, the feed air generator 26 that generates the low-oxygen feed air and the high-oxygen feed air using the gas separation membrane 51 is employed, but the present invention is not limited to this, and the PSA mechanism may be adopted.

FIG. 4 is a configuration diagram of the training device 55 using the raw air generator 60 employing the PSA mechanism.
The raw air generator 60 is a large-sized facility, and has an air inlet 30, a first discharge section 31 for discharging low-oxygen raw air, and a second discharge section 32 for discharging high-oxygen raw air. .
The feed air generator 60 includes an air tank 100 , a first adsorption tower 101 and a second adsorption tower 102 . The feed air generator 60 also has a group of switching valves for switching between the first adsorption tower 101 and the second adsorption tower 102 .

In the feed air generator 60, in each of the first adsorption tower 101 and the second adsorption tower 102, a cycle of an adsorption step, a first pressure equalization step, a desorption step, and a second pressure equalization step is repeated. An oxygen feed air and a low oxygen feed air are produced respectively.
In the feed air generator 60, while one adsorption tower is undergoing the adsorption step, the other adsorption tower is undergoing the desorption step, and while one adsorption tower is undergoing the first pressure equalization step, the other adsorption tower is undergoing the first pressure equalization step. is subjected to a second pressure equalization step.

In the raw air generator 60 , the air tank 100 is connected to the air inlet 30 and the air outlet passage 105 . As in the previous embodiment, air is supplied from the air compressor 25 to the air inlet 30 and the supplied air is temporarily stored in the air tank 100 . Then, the stored raw air is discharged to the air outlet passage portion 105 . A first inlet channel portion 107 provided with an on-off valve 106 is connected between the air outflow channel portion 105 and the first adsorption tower 101, and a second inlet channel portion 110 with an on-off valve 108 is connected. It is connected between the second adsorption tower 102 .

The first adsorption tower 101 and the second adsorption tower 102 are filled with an adsorbent having high adsorption capacity for a specific gas. Examples of the adsorbent include porous adsorbents such as zeolite capable of adsorbing nitrogen and activated carbon capable of adsorbing oxygen.
Zeolite has the property of selectively adsorbing nitrogen from feed air, and its ability to adsorb nitrogen increases under high-pressure conditions. For this reason, the first adsorption tower 101 and the second adsorption tower 102 filled with zeolite adsorb a large amount of nitrogen in the adsorption step under pressure, and the oxygen-rich feed air flows out, and then nitrogen is released in the desorption step under reduced pressure. It is desorbed and the low-oxygen feed air is discharged.

On the other hand, activated carbon has the property of selectively adsorbing oxygen from raw material air, and its oxygen adsorption capacity increases under high-pressure conditions. For this reason, the first adsorption tower 101 and the second adsorption tower 102 filled with activated carbon adsorb a large amount of oxygen in the adsorption step under pressure and flow out low-oxygen feed air, and then in the desorption step under reduced pressure, oxygen is released. It is desorbed to produce oxygen-rich feed air.

The first adsorption tower 101 is provided with an on-off valve 115, and is provided with a first high-oxygen-concentration air outflow passage 111 for outflowing the high-oxygen feed air, and an on-off valve 112, and is provided with a first low-oxygen air outlet for outflowing the low-oxygen feed air. The oxygen concentration air outflow path 113 is connected. Further, the second adsorption tower 102 is provided with an on-off valve 120, a second high-oxygen-concentration air outflow passage 121 for outflowing the high-oxygen feed air, and an on-off valve 123, for outflowing the low-oxygen feed air. 2 low oxygen concentration air outflow path 125 is connected.
The first high-oxygen concentration air outflow passage 111 and the second high-oxygen concentration air outflow passage 121 are connected to a second discharge section 32 that merges and discharges the high-oxygen raw air. The first low-oxygen concentration air outflow passage 113 and the second low-oxygen concentration air outflow passage 125 are merged and connected to the first discharge section 31 for discharging the low-oxygen raw material air.

In each of the 1st adsorption tower 101 and the 2nd adsorption tower 102, the process which makes 1 cycle the adsorption process, the 1st pressure equalization process, the desorption process, and the 2nd pressure equalization process is repeated. When generating the high-oxygen feed air and the low-oxygen feed air, respectively, the on-off valves 106, 108, The opening and closing operations of 115, 120, 112 and 123 are controlled.

Also in this embodiment, the first discharge section 31 is connected to the main flow path 23 leading to the training room 2 .
The second discharge section 32 is connected to a high-oxygen air flow path 36 leading to a mixing section 33 , and the low-oxygen raw air flowing through the main flow path 23 is mixed with the high-oxygen raw air.
Also in this embodiment, the low-oxygen raw air flowing through the main flow passage 23 is mixed with the high-oxygen raw air generated by the raw air generator 60 to create low-oxygen mixed air adjusted to an appropriate oxygen concentration, It is supplied to each training room 2a, 2b.

Further, as shown in FIGS. 5 and 6, the low-oxygen air supply device 3 may be provided with a carbon dioxide removal device 61 . The carbon dioxide remover 61 is desirably provided in the oxygen-enriched air flow path 36 as shown in FIGS. According to this embodiment, carbon dioxide can be removed from the oxygen-enriched feed air to reduce the amount of carbon dioxide.
A training device 62 shown in FIG. 5 is an embodiment in which a carbon dioxide removing device 61 is added to the training device 1 shown in FIG. do.
A training device 63 shown in FIG. 6 is an embodiment in which a carbon dioxide removing device 61 is added to the training device 55 shown in FIG. do.

1, 55, 62, 63 training device 2a, 2b training room 3 low oxygen air supply device 25 air compressor 26 raw air generation device 30 air introduction port 31 first discharge section 32 second discharge section 33 mixing section 36 high oxygen air flow path 42a 42b Mixed flow control means 45 Exhaust flow path 46 Exhaust flow control means 60 Raw air generator 61 Carbon dioxide remover

Claims (6)

In a low-oxygen air supply device that supplies low-oxygen air having an oxygen concentration lower than that of the outside air,
having a feed air generator and a mixing section,
The raw air generator is
Using air as a raw material, low-oxygen raw air having a lower oxygen concentration than the outside air and high-oxygen raw air having a higher oxygen concentration than the outside air are generated,
having an air inlet, a first discharge section for discharging the low-oxygen feed air, and a second discharge section for discharging the high-oxygen feed air,
The mixing unit mixes the high-oxygen raw air with the low-oxygen raw air to generate low-oxygen mixed air having an oxygen concentration lower than that of the outside air ,
A high-oxygen air flow path from the second discharge section of the raw air generating device to the mixing section, a mixing flow rate control means disposed in the high-oxygen air flow path, and an exhaust for exhausting surplus high-oxygen raw air. and an exhaust flow rate control means,
The low-oxygen air is characterized in that the flow rate of the high-oxygen feed air introduced into the mixing section is controlled, and the exhaust flow rate control means is adjusted in inverse proportion to the mixing flow rate control means. feeding device. 2. The low-oxygen air supply device according to claim 1, wherein said mixing section comprises a pipeline. The feed air generator has a gas separation membrane capable of separating nitrogen and oxygen, and the gas separation membrane separates the air into the low-oxygen feed air and the high-oxygen feed air. The hypoxic air supply device according to claim 1 or 2 . The raw air generator includes an adsorbent having a high adsorption capacity for a specific gas, and separates the air into the low-oxygen raw air and the high-oxygen raw air by a PSA mechanism. 3. The hypoxic air supply device according to claim 1 or 2 . 5. The low-oxygen air supply system according to any one of claims 1 to 4 , further comprising a carbon dioxide removal device for removing carbon dioxide from said high-oxygen feed air. A training room in which a person can exercise and the hypoxic air supply device according to any one of claims 1 to 5 are provided, and the inside of the training room can be made into a hypoxic environment in which the oxygen concentration is lower than that of the outside air. A training device characterized by:

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