JP2022034689A - Low oxygen air supply device and training device - Google Patents

Abstract

To provide a low oxygen air supply device enabling miniaturization.SOLUTION: The low oxygen air supply device comprises a raw material air generator 26. The raw material air generator 26 comprises a gas separating member capable of separating nitrogen and oxygen, and has an air inlet port 30, a first discharge part 31, and a second discharge part 32. In the low oxygen air supply device: raw material air is introduced from the air inlet port 30, low oxygen raw material air having a lower oxygen concentration than that of the raw material air is discharged from the first discharge part 31, and high oxygen raw material air having a higher oxygen concentration than that of the raw material air is discharged from the second discharge part; the low oxygen raw material air and the high oxygen raw material air are mixed to generate a low oxygen mixed air having a lower oxygen concentration than that of the raw material air; flow rate control means 46 is provided at some position, and the flow rate control means 46 is controlled on the basis of a detected value of detection means.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hypoxic air supply device that uses air as a raw material to generate hypoxic air having a lower oxygen concentration than the outside air and supplies the hypoxic air to other devices. The present invention also relates to a training device capable of performing simulated high altitude training.

There is known a training device that artificially creates an environment different from a normal indoor environment or a normal outdoor environment and performs training in that environment. For example, we will create a hypoxic environment that imitates the highlands and train in it to enhance endurance and improve cardiopulmonary function.
The hypoxic room disclosed in Patent Document 1 can be trained in an artificially created hypoxic environment.

Further, Patent Document 2 discloses an air supply device including a first special environment chamber having a high oxygen concentration and a second special environment chamber having a low oxygen concentration.
FIG. 4 of Patent Document 2 discloses a configuration in which one special environment chamber is switched between an environment having a high oxygen concentration and an environment having a low oxygen concentration.

Japanese Patent No. 4721150 Japanese Unexamined Patent Publication No. 2018-29750

As a measure to make the inside of the training room a low oxygen environment, for example, there is a method of using a raw material air generator of a polymer separation membrane type. The raw material air generator of the polymer separation membrane type is often used as a device for generating nitrogen gas, and oxygen is separated by pressurizing the air with a compressor or the like and introducing the pressurized air. However, it produces a gas with a higher proportion of nitrogen than the outside air.
Here, the low oxygen air generated by the raw material air generator may have an oxygen concentration that is too low for high altitude training, and may be supplied to the training room after adjusting the oxygen concentration by mixing outside air.

As a measure for adjusting the oxygen concentration, the method of the piping system diagram shown in FIG. 9 and the method of the piping system diagram shown in FIG. 10 can be considered.
The measure shown in FIG. 9 is a method of taking in outside air with a separate blower or the like and mixing the outside air with the low oxygen air generated by the raw material air generator (hereinafter, may be referred to as low oxygen raw material air).

The measure shown in FIG. 10 is a method in which the flow path to be pressurized by an air compressor and introduced into the raw material air generator is branched, and the air flowing through the branched flow path is mixed with the low oxygen raw material air generated by the raw material air generator. Is. That is, the measure shown in FIG. 10 is to branch the pressurized air with a compressor and introduce it into the secondary side flow path of the raw material air generator.

In the former method of using a separate blower, it is necessary to install a blower separately from the air compressor. In addition, duct piping that takes in outside air is essential for this measure.
Therefore, in this measure, the system including the training room is often large.

The latter policy of branching the primary side flow path of the raw material air generator and allowing air to flow to the secondary side of the raw material air generator is to use both the air introduced into the raw material air generator 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 adopted, and the system including the training room may become large.

In the air supply device disclosed in Patent Document 2, a measure of branching the primary side flow path to be introduced into the latter raw material air generator and allowing air to flow to the secondary side of the raw material air generator is adopted.
In the air supply device disclosed in FIG. 4 of Patent Document 2, when the oxygen concentration in the special environment chamber is set to be low, the outside air branched from the primary side flow path is introduced to the secondary side of the raw material air generator.
In the air supply device of Patent Document 2, low oxygen raw material air and high oxygen air having a high oxygen concentration generated by the raw material air generator (hereinafter, may be referred to as high oxygen raw material air) are simultaneously supplied to the special environment room. Will not be done.

The present invention pays attention to the above-mentioned points of the prior art, and an object of the present invention is to provide a low oxygen air supply device capable of miniaturization as compared with the prior art.
Another object of the present invention is to provide a training device capable of downsizing the low oxygen air supply device attached to the training room as compared with the prior art.

Applicants decided to use a gas separation membrane capable of separating nitrogen and oxygen to produce hypoxic air.
That is, air is introduced into the gas separation membrane to prepare low oxygen raw material air having a lower oxygen concentration than the air and high oxygen raw material air having a higher oxygen concentration than the air, and the high oxygen raw material air is added to the low oxygen raw material air. Was to be mixed to produce the desired low oxygen air.
When the present inventors made a prototype of a low oxygen air supply device based on this concept, they faced a problem that it may be difficult to stably control the oxygen concentration of the low oxygen air.

An embodiment for solving the above-mentioned problems is a low oxygen air supply device that supplies low oxygen air having a lower oxygen concentration than raw material air, and has a special air generator, and the special air generator is nitrogen. It has a gas separating member capable of separating oxygen and oxygen, and has an air introduction port, a first discharge part, and a second discharge part, and raw material air is introduced from the air introduction port, and the first is said. The low oxygen raw material air having a lower oxygen concentration than the raw material air is discharged from the discharge unit, and the high oxygen raw material air having a higher oxygen concentration than the raw material air is discharged from the second discharge unit. A mixing unit that mixes the raw material air and the high oxygen raw material air to generate a low oxygen mixed air having a lower oxygen concentration than the raw material air, an exhaust unit that exhausts excess high oxygen raw material air to the outside of the system, and the above. Based on the detection means for detecting any of the oxygen concentration, nitrogen concentration, pressure, or flow rate of the low oxygen raw material air, the flow rate control means provided at any position in the first group, and the detection values of the detection means. , A control means for controlling the flow rate control means, and a low oxygen air supply device.
Group 1 (1) Between the second exhaust section and the exhaust section.
(2) Between the second discharging section and the mixing section.
(3) Between the mixing section and the supply destination of the low oxygen air.
(4) Between the first discharging section and the mixing section.

The "between the second exhaust section and the exhaust section" includes the position of the "exhaust section". That is, a flow rate control means may be provided in the exhaust unit.
As a specific measure of "controlling the flow rate control means based on the detection value of the detection means", for example, it is conceivable to control the flow rate control means so that the detection value of the detection means is within a certain range.
"So that the detection value of the detection means is within a certain range" means that the target value may have a range, and does not deny the target value without a range. For example, the flow rate control means may be controlled so that the detection value of the detection means becomes a specific value.
Further, the oxygen concentration of the low oxygen raw material air is obtained by calculation or the like based on the nitrogen concentration, pressure, or flow rate of the low oxygen raw material air, and the flow control means is controlled so that this value is within a predetermined range. May be.
Similarly, the nitrogen concentration, pressure, or flow rate of the low oxygen raw material air is obtained by calculation or the like based on the oxygen concentration of the low oxygen raw material air, and the flow rate control means is controlled so that this value is within a predetermined range. It may be a thing.
"To make this value within a predetermined range" means that the target value may have a range, and does not deny a target value without a range.
In the low oxygen air supply device of this embodiment, the low oxygen raw material air generated by the special air generator is mixed with the high oxygen raw material air also generated by the special air generator to adjust the oxygen concentration.
Therefore, the burden on the upstream device such as an air compressor that supplies air as a raw material to the special air generator is small, and the upstream device can be miniaturized.
Further, in the low oxygen air supply device of this embodiment, it is not necessary to provide a blower, an air compressor, or the like in addition to the device for supplying the raw material air to the special air generator.
Therefore, the low oxygen air supply device of this embodiment can be miniaturized as compared with the conventional one.
Further, the oxygen concentration of the low oxygen air generated by the low oxygen air supply device of this embodiment is stable.
The present inventors consider that it is necessary to stabilize the oxygen concentration of the low oxygen raw material air as a precondition for stabilizing the oxygen concentration of the low oxygen raw material air, and to stabilize the oxygen concentration of the low oxygen raw material air. It was set as a research subject.
In order to stabilize the oxygen concentration of the low oxygen raw material air, it was decided to directly monitor the oxygen concentration of the low oxygen raw material air. Then, it was decided to control the flow rate control means provided at another position so that the oxygen concentration of the low oxygen raw material air would be stable.
Further, since the ratio of oxygen and nitrogen in the atmosphere is constant, the oxygen concentration of the low oxygen raw material air can be indirectly detected by detecting the nitrogen concentration of the low oxygen raw material air. Therefore, even if the flow rate control means provided at another position is controlled based on the nitrogen concentration of the low oxygen raw material air, the oxygen concentration of the low oxygen raw material air is stable.
In addition, the oxygen concentration of the low oxygen raw material air has a correlation with the pressure of the low oxygen raw material air and the flow rate of the low oxygen raw material air, and by monitoring these, the oxygen concentration fluctuation of the low oxygen raw material air can be indirectly changed. I also found that I could know.
Therefore, even if the pressure of the low oxygen raw material air is detected and the flow rate control means provided at another position is controlled based on this pressure, the oxygen concentration of the low oxygen raw material air is stable. Further, even if the flow rate of the low oxygen raw material air is detected and the flow rate control means provided at another position is controlled based on this flow rate, the oxygen concentration of the low oxygen raw material air is stable.
In the low oxygen air supply device of this embodiment, the flow control means according to the first group is based on the detection value of the detection means for detecting any of the oxygen concentration, the nitrogen concentration, the pressure, and the flow rate of the low oxygen raw material air. Since it is controlled, the oxygen concentration of the low oxygen raw material air is stable.

In the above aspect, it is desirable that the detecting means is an oxygen concentration detecting means provided between the first discharging portion and the mixing portion.

According to this aspect, the oxygen concentration of the low oxygen raw material air can be detected by the detecting means.

Another aspect for solving the above-mentioned problems is a low oxygen air supply device for supplying low oxygen air having a lower oxygen concentration than the raw material air, which has a special air generator and has the special air generator. Has a gas separating member capable of separating nitrogen and oxygen, has an air introduction port, a first discharge part, and a second discharge part, and raw material air is introduced from the air introduction port. The low oxygen raw material air having a lower oxygen concentration than the raw material air is discharged from the first discharging part, and the high oxygen raw material air having a higher oxygen concentration than the raw material air is discharged from the second discharging part. A mixing section that mixes the low oxygen raw material air and the high oxygen raw material air to generate a low oxygen mixed air having a lower oxygen concentration than the raw material air, and an exhaust section that exhausts excess high oxygen raw material air to the outside of the system. And the detection means for detecting any of the oxygen concentration, the nitrogen concentration, the pressure, or the flow rate of the high oxygen raw material air, the flow rate control means provided at any position of the first group, and the detection of the detection means. A low oxygen air supply device comprising: a control means for controlling the flow rate control means based on a value.
Group 1 (1) Between the second exhaust section and the exhaust section.
(2) Between the second discharging section and the mixing section.
(3) Between the mixing section and the supply destination of the low oxygen air.
(4) Between the first discharging section and the mixing section.

The "between the second exhaust section and the exhaust section" includes the position of the "exhaust section". That is, a flow rate control means may be provided in the exhaust unit.
As a specific measure of "controlling the flow rate control means based on the detection value of the detection means", for example, it is conceivable to control the flow rate control means so that the detection value of the detection means is within a certain range.
"So that the detection value of the detection means is within a certain range" means that the target value may have a range, and does not deny the target value without a range. For example, the flow rate control means may be controlled so that the detection value of the detection means becomes a specific value.
Further, the oxygen concentration of the low oxygen raw material air is obtained by calculation or the like based on the oxygen concentration, nitrogen concentration, pressure, or flow rate of the high oxygen raw material air, and the flow control means controls so that this value is within a predetermined range. It may be something that is done.
Similarly, based on the oxygen concentration, nitrogen concentration, pressure, or flow rate of the high oxygen raw material air, the oxygen concentration, nitrogen concentration, pressure, or flow rate of the low oxygen raw material air is obtained by calculation or the like, and this value is within a predetermined range. As such, the flow control means may be controlled.
"To make this value within a predetermined range" means that the target value may have a range, and does not deny a target value without a range.
The oxygen concentration of the low oxygen raw material air separated by the gas separation member correlates with the oxygen concentration of the high oxygen raw material air, the nitrogen concentration of the high oxygen raw material air, the pressure of the high oxygen raw material air, or the flow rate of the high oxygen raw material air. It turned out that there was. It was found that the oxygen concentration of the low oxygen raw material air can also be stabilized by monitoring these and controlling the flow rate control means.
In the low oxygen air supply device of this embodiment, the flow control means according to the first group is based on the detection value of the detection means for detecting any of the oxygen concentration, the nitrogen concentration, the pressure, and the flow rate of the high oxygen raw material air. Since it is controlled, the oxygen concentration of the low oxygen raw material air is stable.

In each of the above embodiments, the flow rate control means has a high oxygen air flow path from the second discharge section to the mixing section and an exhaust path branched from the high oxygen air flow path to the exhaust section. , It is desirable that it is provided in the exhaust passage.

It was found that the oxygen concentration of the low oxygen raw material air can be changed by increasing or decreasing the displacement of the high oxygen raw material air. This aspect is based on this finding, and the oxygen concentration of the low oxygen raw material air can be stabilized by adjusting the displacement to the outside of the system.

In each of the above-described embodiments, the high oxygen air flow path from the second discharge section to the mixing section, the branch section branching the high oxygen air flow path, and the exhaust gas branched at the branch section to reach the exhaust section. It is desirable that the flow control means has a path and is provided between the second discharge portion and the branch portion.

According to this aspect, the oxygen concentration of the low oxygen raw material air can be changed by increasing or decreasing the displacement of the high oxygen raw material air to the outside of the system.

In each of the above embodiments, the mixing flow rate control means for controlling the amount of the high oxygen raw material air mixed with the low oxygen raw material air is provided, and the opening degree of the flow rate control means and the opening degree of the mixed flow rate control means are set. It is desirable to be associated and controlled.

According to this aspect, when the oxygen concentration of the low oxygen raw material air changes, the oxygen concentration can be rapidly stabilized.

In each of the above embodiments, the mixing flow rate controlling means for controlling the amount of the high oxygen raw material air mixed with the low oxygen raw material air is provided, and the mixed flow rate controlling means has an oxygen concentration in the flow path after the mixing portion. It is desirable to be controlled based on.

According to this aspect, the oxygen concentration in the flow path after the mixing portion can be adjusted to a desired oxygen concentration value with high accuracy.

The mode of the training device includes a training room in which a person can exercise internally and the low oxygen air supply device according to any one of claims 1 to 7, and the oxygen concentration in the training room is lower than that of the raw material air. It is a training device characterized by being able to create an oxygen environment.

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

According to the present invention, the low oxygen air supply device can be downsized as compared with the conventional one. Further, according to the present invention, the training device can be made smaller than the conventional one.

It is a block diagram of the training apparatus of embodiment of this invention. It is sectional drawing of the raw material air generation apparatus adopted in the low oxygen air supply apparatus of a training apparatus. It is a block diagram of the training apparatus of another embodiment of this invention. It is a block diagram of the training apparatus of still another embodiment of this invention. It is a block diagram of the training apparatus of still another embodiment of this invention. It is a block diagram of the training apparatus of still another embodiment of this invention. It is a block diagram of the training apparatus of still another embodiment of this invention. It is a block diagram of the training apparatus of still another embodiment of this invention. It is a block diagram of the training apparatus of the prior art. It is a block diagram of the training apparatus of another prior art.

Hereinafter, embodiments of the present invention will be described.
The training device 1 of the present embodiment has two training rooms 2a and 2b, one low oxygen air supply device 3, and a control device 5.
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 adopted in the present embodiment can arbitrarily adjust the internal environment.

Specifically, the temperature and humidity in the training rooms 2a and 2b can be adjusted. Further, in the present embodiment, the oxygen concentration in the training rooms 2a and 2b can be arbitrarily adjusted.
That is, the training rooms 2a and 2b have a temperature sensor and a humidity sensor (not shown). Further, the training rooms 2a and 2b have first oxygen concentration sensors 13a and 13b and second oxygen concentration sensors 15a and 15b.
The first oxygen concentration sensor 13 is used for controlling the oxygen concentration in the training room 2, and is referred to as an "indoor oxygen concentration monitoring sensor 13" for convenience of explanation.
The second oxygen concentration sensor 15 monitors that the oxygen concentration in the training room 2 is not excessively lowered, and is referred to as a "minimum oxygen concentration monitoring sensor 15" for convenience of explanation.

Ventilation devices (not shown) are provided in the training rooms 2a and 2b, and carbon dioxide concentration sensors 17a and 17b are provided downstream of the ventilation devices.

There is a known air conditioner (not shown) in the training rooms 2a and 2b, and the signals of the temperature sensor and the humidity sensor are input to the air conditioner so that the temperature and humidity in the training rooms 2a and 2b become the desired environment. Is controlled.

In the training device 1 of the present embodiment, there is one low oxygen air supply device 3, and the low oxygen air is supplied to the two training rooms 2a and 2b by one low oxygen air supply device 3.
As will be described later, the raw material air generator 26 (special air generator) of the low oxygen air supply device 3 generates low oxygen air having a reduced oxygen concentration, and then the air having a large amount of oxygen is mixed to generate oxygen. Although the concentration is adjusted, the mixed air is low oxygen air having a lower oxygen concentration than the outside air (raw material air).
In order to distinguish between two types of low oxygen air having different oxygen concentrations, the low oxygen air generated by the raw material air generator 26 is called "low oxygen raw material air", and the mixed low oxygen air is called "low oxygen mixed air". It is called.

The low oxygen air supply device 3 has an air compressor 25 and a raw material air generation device 26 as shown in FIG.
The raw material air generator 26 is a known polymer separation membrane type nitrogen gas generator, which separates oxygen by introducing air pressurized by an air compressor 25, and has a nitrogen content as compared with the introduced air. It discharges low-oxygen raw material air, which has a high proportion, and high-oxygen raw material air, which has a higher proportion of oxygen than the introduced air.

As shown in FIGS. 1 and 2, the raw material air generator 26 has an air inlet 30, a first discharge unit 31 for discharging low oxygen raw material air, and a second discharge unit 32 for discharging high oxygen raw material air. is doing.
When outside air is introduced from the air inlet 30 of the raw material air generator 26, low oxygen raw material air having a low oxygen concentration and high oxygen raw material air having a high oxygen concentration are generated inside. Then, the low oxygen raw material air is discharged from the first discharge unit 31, and the high oxygen raw material air is discharged from the second discharge unit 32.
The specific structure of the raw material air generator 26 will be described later.

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

The low oxygen air supply device 3 has a main flow path 23 and a high oxygen air flow path 36. The main flow path 23 is a flow path that enters the raw material air generator 26 from the air compressor 25, passes through the first discharge section 31 of the raw material air generator 26, passes through the mixing section 33a, and reaches the first training room 2a. The high oxygen air flow path 36 is a flow path from the second discharge portion 32 of the raw material air generator 26 to the mixing portion 33a. The mixing portion 33a is a confluence portion between the main flow path 23 and the high oxygen air flow path 36 and a pipeline on the downstream side thereof.

The main flow path 23 is composed of a raw material air introduction path 37 and a low oxygen air flow path 38. The raw material air introduction path 37 is a flow path connecting the air compressor 25 and the air introduction port 30 of the raw material air generator 26. The low oxygen air flow path 38 is a flow path from the first discharge portion 31 of the raw material air generator 26 to the training room 2a.
An oxygen concentration sensor 41 is provided between the first discharge unit 31 and the mixing unit 33a in the low oxygen air flow path 38. The oxygen concentration sensor 41 monitors the oxygen concentration of the low oxygen raw material air generated by the raw material air generator 26, and may be referred to as a “low oxygen concentration monitoring sensor 41” for convenience of explanation.

A constant flow rate means (needle valve) 61a is provided between the downstream side of the hypoxia concentration monitoring sensor 41 and the mixing portion 33a side. Therefore, it is possible to reduce the fluctuation of the flow rate of the low oxygen raw material air discharged from the first discharge unit 31 of the raw material air generator 26. Further, since the constant flow rate means 61a is provided at the position, the internal pressure of the mixing portion 33a is low, and the high oxygen raw material air is smoothly mixed with the low oxygen raw material air.

As described above, the high oxygen air flow path 36 is a flow path from the second discharge portion 32 of the raw material air generator 26 to the mixing portion 33a. The high oxygen air flow path 36 is provided with a mixing flow rate control means 42a. Specifically, the mixing flow rate control means 42a is a motor valve, and the opening degree can be adjusted.
Further, the 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 material air generated by the raw material air generator 26, and is referred to as a “high oxygen concentration monitoring sensor 43” for convenience of explanation.

The high oxygen air flow path 36 is further provided with an exhaust flow path (exhaust passage) 45. In the present embodiment, the high oxygen air flow path 36 has a branch portion 65, and the exhaust flow path (exhaust passage) 45 is branched.
The exhaust flow path 45 connects the branch portion 65 and the exhaust portion 48, and is a flow path for exhausting excess high oxygen raw material air from the exhaust portion 48 to the outside of the system. In the present embodiment, a part of the high oxygen raw material air discharged from the second discharge unit 32 is exhausted from the exhaust unit 48 to the outside of the system and discarded in the atmosphere.
The exhaust flow rate 45 is provided with an exhaust flow rate control means 46. The exhaust flow rate control means 46 is specifically a motor valve, and the opening degree can be adjusted. The exhaust flow rate control means 46 may be provided at the end of the exhaust flow path 45.

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 described above, the same member shall be given the same number, and a code number b shall be given to distinguish between the two. Omits duplicate explanations.

As described above, the exhaust flow rate control means 46 is provided in the exhaust flow path 45. When the opening degree of the exhaust flow rate control means 46 is changed in the opening direction, the amount of high oxygen raw material air discharged to the outside of the system increases, and instead, the low oxygen raw material air discharged from the first discharge unit 31 is discharged. The amount tends to decrease, and the oxygen concentration of the low oxygen raw material air decreases. When the opening degree of the exhaust flow rate control means 46 is changed in the throttle direction, the amount of high oxygen raw material air discharged to the outside of the system decreases, and instead, the low oxygen raw material air discharged from the first discharge unit 31 is discharged. The amount tends to increase, and the oxygen concentration of the low oxygen raw material air rises.

The control device 5 is a known computer, and in the present embodiment, the control device 5 is a setting means for setting the oxygen concentration, a concentration control means for the low oxygen raw material air for controlling the oxygen concentration of the low oxygen raw material air, and training rooms 2a and 2b. It functions as an oxygen concentration control means for controlling the oxygen concentration of.
Specifically, the control device 5 has an oxygen concentration setting unit, a low oxygen raw material air control unit, and an oxygen concentration control unit. These are realized by computer programs.
The low oxygen raw material air control unit has an oxygen concentration detection unit (oxygen concentration detection unit for low oxygen raw material air), a comparison unit, and an exhaust flow rate control unit. Further, the oxygen concentration control unit has an oxygen concentration detection unit (oxygen concentration detection unit in the training room) and a mixing flow rate control unit.

The signals of all the sensors are input to the control device 5, and all the flow rate control means are controlled by the control device 5.
In particular, the input signals related to this embodiment are the detection signal of the hypoxia concentration monitoring sensor 41 and the detection signal of the indoor oxygen concentration monitoring sensor 13, as shown in FIG.
Further, the control targets particularly related to this embodiment are the exhaust flow rate control means 46 and the mixed flow rate control means 42a and 42b.

As described above, the detection signal of the hypoxia concentration monitoring sensor 41 is input to the control device 5, and the oxygen concentration of the hypoxia raw material air detected by the hypoxia concentration monitoring sensor 41 falls within a certain value or a certain range. As described above, the opening degree of the exhaust flow rate control means 46 is controlled.
In the low oxygen raw material air control unit of the control device 5, the signal of the low oxygen concentration monitoring sensor 41 is input to the oxygen concentration detecting unit (oxygen concentration detecting unit of the low oxygen raw material air), and the actual oxygen concentration of the low oxygen raw material air is measured. Be recognized.
Then, the comparison unit compares the oxygen concentration of the preset low oxygen raw material air with the oxygen concentration of the actual low oxygen raw material air, and the exhaust flow control unit calculates the output according to the difference between the two.
That is, in the present embodiment, the oxygen concentration of the low oxygen raw material air is fed back to the opening degree of the exhaust flow rate control means 46, and is fed back from the exhaust unit 48 to the amount of the high oxygen raw material air discarded to the outside of the system.

In the present embodiment, when the oxygen concentration of the low oxygen raw material air detected by the low oxygen concentration monitoring sensor 41 is higher than the set value, the opening of the exhaust flow rate control means 46 is opened to adjust the oxygen concentration of the low oxygen raw material air. Decrease.
On the contrary, when the oxygen concentration of the low oxygen raw material air detected by the oxygen concentration sensor 41 is lower than the set value, the opening degree of the exhaust flow rate control means 46 is reduced to increase the oxygen concentration of the low oxygen raw material air.
The oxygen concentration of the low oxygen raw material air may be set directly by the user. Further, the oxygen concentration setting value of the low oxygen raw material air may be set automatically or manually in association with the oxygen concentration setting value of the training room. For example, a value obtained by subtracting a predetermined value from the oxygen concentration setting value in the training room can be used as the oxygen concentration setting value of the low oxygen raw material air. Further, the oxygen concentration setting value of the low oxygen raw material air may be controlled so as to be automatically changed in association with the controlled amount of the oxygen concentration in the training room.
The control of the low oxygen raw material air control unit may be PID control.

By changing the opening degree of the exhaust flow rate control means 46, the flow rate balance in the raw material air generator 26 changes, and the oxygen concentration contained in the low oxygen raw material air changes.
That is, when the opening degree of the exhaust flow rate control means 46 becomes smaller, the amount of high oxygen raw material air discarded from the exhaust unit 48 to the outside of the system decreases.
On the other hand, the amount of low oxygen raw material air discharged from the first discharge unit 31 tends to increase. As a result, the oxygen concentration of the low oxygen raw material air increases.

On the contrary, when the opening degree of the exhaust flow rate control means 46 becomes large, the amount of high oxygen raw material air discarded from the exhaust unit 48 to the outside of the system increases. On the other hand, the amount of low oxygen raw material air discharged from the first discharge unit 31 tends to decrease. As a result, the oxygen concentration of the low oxygen raw material air decreases.

Next, the functions of the training device 1 and the low oxygen air supply device 3 will be described.
Prior to the use of the training device 1, the oxygen concentration in each training room 2a and 2b is set in the control device 5.
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 material air generation device 26 via the raw material air introduction path 37.
Oxygen and nitrogen are separated inside the raw material air generator 26, and low oxygen raw material air having an oxygen concentration of about 8% is discharged from the first discharge unit 31.
Further, high oxygen raw material air having an oxygen concentration of about 38% is discharged from the second discharge unit 32.

That is, the oxygen ratio in the atmosphere is about 21%, but the low oxygen raw material air whose oxygen ratio is reduced to about 8% by passing through the raw material air generator 26 is discharged from the first discharge unit 31, and the oxygen concentration becomes high. The high oxygen raw material air that has risen to about 38% is discharged from the second discharge section 32.

The oxygen concentration of the low oxygen raw material air is detected by the low oxygen concentration monitoring sensor 41 and input to the control device 5.
In the present embodiment, the air introduced from the upstream air compressor 25 into the raw material air generator 26 so that the oxygen concentration of the low oxygen raw material air discharged from the raw material air generator 26 is generally stable at the above-mentioned level. The amount and pressure of oxygen are adjusted by a control valve or the like (not shown).

In particular, in the present embodiment, the oxygen concentration of the low oxygen raw material air detected by the low oxygen concentration monitoring sensor 41 is fed back to the exhaust flow rate control means 46 by the control device 5 (low oxygen raw material air control unit) to generate the raw material air. The oxygen concentration of the low oxygen raw material air discharged from the device 26 is stable.

In the low oxygen air supply device 3 of the present embodiment, the high oxygen generated by the raw material air generator 26 passing through the high oxygen air flow path 36 is added to the low oxygen raw material air flowing through the main flow path 23 (low oxygen air flow path 38). The oxygen source air is mixed to create a low oxygen mixed air adjusted to an appropriate oxygen concentration, which is supplied to the training rooms 2a and 2b.

Then, the control device 5 (oxygen concentration control unit) controls the opening degree of the mixing flow rate control means 42a and 42b so that the oxygen concentration in each training room 2a and 2b becomes a set value.
Specifically, the signals of the indoor oxygen concentration monitoring sensors 13a and 13b are input to the oxygen concentration detection unit (oxygen concentration detection unit of the training room) of the control device 5 (oxygen concentration control unit), and the actual conditions of the training rooms 2a and 2b are realized. Oxygen concentration is recognized. Then, the oxygen concentration of each of the preset training rooms 2a and 2b is compared with the oxygen concentration of each of the actual training rooms 2a and 2b in a comparison unit (not shown), and the mixing flow rate control unit outputs an output according to the difference between the two. It is calculated.
That is, in the present embodiment, the oxygen concentrations of the training rooms 2a and 2b monitored by the indoor oxygen concentration monitoring sensors 13a and 13b are fed back to the mixing flow rate control means 42a and 42b.
If the oxygen concentration in the training room 2a is lower than the set value, the opening degree of the mixing flow control means 42a is increased, and more high oxygen is generated by the low oxygen raw material air flowing through the main flow path 23 (low oxygen air flow path 38). The raw material air is mixed in to increase the oxygen concentration contained in the low oxygen mixed air. This low oxygen mixed air is 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 below the set value, the opening degree of the mixing flow rate control means 42b is increased.

On the contrary, when the oxygen concentration in each training room 2a and 2b is higher than the set value, the opening degree of the mixed flow control means 42a and 42b is reduced, and the low oxygen flowing through the main flow path 23 (low oxygen air flow path 38) is reduced. The amount of high oxygen mixed in the raw material air is reduced to reduce the oxygen concentration of the low oxygen mixed air. This low oxygen mixed air is supplied to the training rooms 2a and 2b to reduce the oxygen concentration in the training rooms 2a and 2b.

In this way, in the control device 5, the opening degree of the exhaust flow rate control means 46 is controlled so that the oxygen concentration of the low oxygen raw material air falls within a certain value or a certain range, and at the same time, the oxygen concentration of each training room 2a and 2b is set. The opening degree of the mixing flow rate control means 42a and 42b is controlled so as to be a value.
Then, the mixing of the high oxygen raw material air and the low oxygen raw material air mixed in the mixing portions 33a and 33b proceeds as these air pass through the pipes from the mixing portions 33a and 33b to the training rooms 2a and 2b. .. The mixed air becomes a hypoxic mixed air having a substantially uniform concentration and enters the training rooms 2a and 2b.
In the raw material air generator 26 adopted in the present embodiment, the oxygen concentration of the low oxygen raw material air discharged from the raw material air generator 26 is stable, so that the oxygen concentration of the low oxygen mixed air supplied to the training rooms 2a and 2b is high. Stabilize. Further, since the high oxygen raw material air is mixed with the stable low oxygen raw material air, the oxygen concentration of the low oxygen mixed air supplied to the training rooms 2a and 2b can be adjusted to a desired oxygen concentration value with high accuracy. ..

In the training device 1 of the present embodiment, the inside of the training rooms 2a and 2b is set to a low oxygen state, and an environment equivalent to a highland such as an altitude of 2000 m to 6000 m can be artificially created.
Training machines such as treadmills (running machines) are installed in the training rooms 2a and 2b.
The user can enter the training rooms 2a and 2b and use the training machine in a hypoxic environment to perform simulated high altitude training.

The carbon dioxide concentration in the training rooms 2a and 2b is monitored by the carbon dioxide concentration sensors 17a and 17b. When the carbon dioxide concentration in the training rooms 2a and 2b rises excessively, the opening degree of the mixing flow rate control means 42a and 42b is opened, and a large amount of high oxygen raw material air is mixed with the low oxygen raw material air flowing through the main flow path 23. .. In this way, the oxygen concentration contained in the low oxygen mixed air is increased to increase the oxygen concentration in the training rooms 2a and 2b.

The oxygen concentration in the training rooms 2a and 2b is also monitored by the minimum oxygen concentration monitoring sensors 15a and 15b. The minimum oxygen concentration monitoring sensors 15a and 15b are one of the safety devices, and when the oxygen concentration in the training rooms 2a and 2b decreases to a certain extent for some reason, they are notified by a notification means (not shown).
When the minimum oxygen concentration monitoring sensors 15a and 15b detect that the oxygen concentration in the training rooms 2a and 2b has dropped excessively, the low oxygen air supply device 3 is stopped and the ventilation device is driven to ensure safety. Then, the oxygen concentration in the training rooms 2a and 2b may be returned to the atmospheric state.

In the embodiment shown in FIG. 1, the oxygen concentration sensor 43 is provided in the high oxygen air flow path 36, but the oxygen concentration sensor 43 may not be provided. Further, in the following embodiment, the same applies to the embodiment in which the detection signal of the oxygen concentration sensor 43 is not used, and the oxygen concentration sensor 43 may not be provided.

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, and introduces air into the raw material air generation device 26. In the low oxygen air supply device 3 of the present embodiment, the air supply capacity required for the air compressor 25 is sufficient for the amount of air required by the raw material air generator 26, and it is not necessary 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 the present embodiment, it is not necessary to install a separate air compressor or the like.
Therefore, the low oxygen air supply device 3 of the present embodiment can be made smaller than the conventional one having a capacity of the same scale.

Next, the structure of the raw material air generator 26 will be supplementarily described with reference to FIG.
The raw material air generator 26 has a built-in gas separation membrane 51 as a gas separation member, and is also used as a nitrogen gas generator.
The raw material air generator 26 has a container-shaped main body 50, and a plurality of pipelines 53 made of a gas separation membrane (gas separation member) 51 are built in the main body 50.
In the internal space of the main body 50, a pair of support portions 52 are arranged at intervals from each other, and the pipeline 53 is supported by the pair of support portions 52. Further, the main body 50 is provided with an air introduction port 30, a first discharge unit 31 for discharging low oxygen raw material air, and a second discharge unit 32 for discharging high oxygen raw material air.
The air introduction port 30 of the main body 50 is connected to the pipeline 53, and the air introduced into the main body 50 flows through the pipeline 53, and is separated into high oxygen raw material air and low oxygen raw material air during the flow.

The gas separation membrane (gas separation member) 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 polymer organic film is used. Since the type and principle of the gas separation membrane are known, detailed description thereof will be omitted.

In the embodiment described above, the opening degree of the exhaust flow rate control means 46 is determined by the oxygen concentration of the low oxygen raw material air detected by the low oxygen concentration monitoring sensor 41, but instead of the oxygen concentration, the low oxygen raw material air is used. The oxygen concentration may be detected and the opening degree of the exhaust flow rate control means 46 may be adjusted according to the oxygen concentration.
For example, instead of the hypoxia concentration monitoring sensor 41 shown in FIG. 1, a nitrogen concentration sensor is provided, and the oxygen concentration of the hypoxia raw material air is indirectly detected by the nitrogen concentration sensor.
When the nitrogen concentration detected by the nitrogen concentration sensor tends to decrease, the oxygen concentration of the low oxygen raw material air discharged from the first discharge unit 31 tends to increase.
Therefore, when the nitrogen concentration detected by the nitrogen concentration sensor decreases, the opening degree of the exhaust flow rate control means 46 is changed in the opening direction to reduce the oxygen concentration of the low oxygen raw material air.
On the contrary, when the nitrogen concentration detected by the nitrogen concentration sensor tends to increase, the oxygen concentration of the low oxygen raw material air discharged from the first discharge unit 31 tends to decrease.
Therefore, when the nitrogen concentration detected by the nitrogen concentration sensor increases, the opening degree of the exhaust flow rate control means 46 is changed in the throttle direction to increase the oxygen concentration of the low oxygen raw material air.

In the embodiment described above, the opening degree of the exhaust gas flow rate control means 46 is adjusted by detecting the change in the composition of the low oxygen raw material air, but the opening degree of the exhaust gas flow rate control means 46 is adjusted by other detected values. You may adjust it.

For example, the pressure of the low oxygen raw material air may be detected and the opening degree of the exhaust flow rate control means 46 may be corrected according to the pressure.
According to the research by the present inventors, when the amount of low oxygen raw material air discharged is large, the oxygen concentration contained in the low oxygen raw material air is high. On the contrary, when the emission amount of the low oxygen raw material air decreases, the oxygen concentration contained in the low oxygen raw material air decreases.
Further, the oxygen concentration and the flow rate of the low oxygen raw material air discharged from the first discharge unit 31 depend on the difference between the pressure of the supply side air supplied to the air introduction port 30 and the outlet pressure of the first discharge unit 31.
The outlet pressure of the first discharge unit 31 and the outlet pressure of the second discharge unit 32 are different.
When the amount of high oxygen raw material air discharged from the second discharge unit 32 increases, the amount of low oxygen raw material air discharged from the first discharge unit 31 decreases, and the oxygen concentration of the low oxygen raw material air also decreases.
On the contrary, when the amount of high oxygen raw material air discharged from the second discharge unit 32 decreases, the amount of low oxygen raw material air discharged from the first discharge unit 31 increases, and the oxygen concentration of the low oxygen raw material air increases. Rise.
Therefore, the oxygen concentration of the low oxygen raw material air can be stabilized by detecting the pressure of the low oxygen raw material air and correcting the opening degree of the exhaust flow rate control means 46 according to the pressure.

In the training device 82 shown in FIG. 3, a pressure sensor 60 is provided between the first discharge section 31 and the mixing section 33a in the low oxygen air flow path 38. The pressure sensor 60 monitors the pressure of the low oxygen raw material air generated by the raw material air generator 26, and is referred to as a “low oxygen pressure monitoring sensor 60” for convenience of explanation. In the present embodiment, the low oxygen pressure monitoring sensor 60 monitors the outlet pressure of the first discharge unit 31 in the raw material air generator 26.

When the amount of low oxygen raw material air discharged from the first discharge unit 31 is large, the outlet pressure of the first discharge unit 31 tends to decrease. In this case, as described above, the oxygen concentration of the low oxygen raw material air is high.
On the contrary, when the amount of low oxygen raw material air discharged from the first discharge unit 31 decreases, the outlet pressure of the first discharge unit 31 tends to increase. In this case, the oxygen concentration of the low oxygen raw material air decreases.

Also in the piping system shown in FIG. 3, the exhaust flow rate control means 46 is provided between the high oxygen air flow path 36 and the exhaust flow path (exhaust passage) 45 branching to the exhaust portion 48 of the exhaust flow path 45. It is provided. The exhaust flow rate control means 46 is a motor valve, and the opening degree can be adjusted.
Therefore, the cross-sectional area of the exhaust flow path (exhaust passage) 45 is changed by the exhaust flow rate control means 46, and when the exhaust flow rate control means 46 is changed in the closing direction, the high oxygen air flow connected to the exhaust flow rate (exhaust passage) 45. The outlet pressure of the second discharge portion 32 of the road 36 tends to increase. That is, when the exhaust flow rate control means 46 is changed in the closing direction, the amount of high oxygen raw material air discharged to the outside of the system decreases, and instead, the amount of low oxygen raw material air discharged from the first discharge unit 31 decreases. The tendency is to increase, and the outlet pressure of the first discharge unit 31 becomes low. Further, the oxygen concentration of the low oxygen raw material air discharged from the first discharge unit 31 increases.

To summarize the points, there is a correlation between the air pressure of the first discharge unit 31 (outlet pressure, the same applies hereinafter) and the oxygen concentration contained in the hypoxic raw material air, and when the air pressure of the first discharge unit 31 rises, it becomes low. When the oxygen concentration of the oxygen raw material air tends to decrease and the air pressure of the first discharge unit 31 decreases, the oxygen concentration of the low oxygen raw material air tends to increase.
Further, there is a correlation between the pressure of the first discharge unit 31 for discharging the low oxygen raw material air and the oxygen concentration of the low oxygen raw material air and the opening degree of the exhaust flow rate control means 46, and the opening degree of the exhaust flow rate control means 46 is determined. When the value is reduced, the oxygen concentration of the low oxygen raw material air increases, and when the opening degree of the exhaust flow rate control means 46 is increased, the oxygen concentration of the low oxygen raw material air decreases.

In the present embodiment, when the pressure of the low oxygen raw material air detected by the low oxygen pressure monitoring sensor 60 is lower than the preset pressure of the low oxygen raw material air (when the oxygen concentration is high), the exhaust flow rate control means 46 The opening degree increases, the pressure of the second discharge section 32 that discharges the high oxygen raw material air tends to decrease, the pressure of the first discharge section 31 that discharges the low oxygen raw material air rises, and the pressure of the low oxygen raw material air increases. Oxygen concentration decreases.
On the contrary, when the pressure of the low oxygen raw material air detected by the low oxygen pressure monitoring sensor 60 is higher than the preset pressure of the low oxygen raw material air (when the oxygen concentration is low), the exhaust flow rate control means 46 is opened. The degree becomes smaller, the pressure of the second discharge part 32 that discharges the high oxygen raw material air tends to increase, the pressure of the first discharge part 31 that discharges the low oxygen raw material air decreases, and the oxygen concentration of the low oxygen raw material air. Rise.

The pressure change of the low oxygen raw material air has little delay with respect to the oxygen concentration change of the low oxygen raw material air. Further, the pressure of the low oxygen raw material air is easy to detect. Therefore, the pressure of the low oxygen raw material air is suitable as an index for detecting the change in oxygen concentration of the low oxygen raw material air.

In the embodiment shown in FIG. 3, the low oxygen concentration monitoring sensor 41 and the high oxygen concentration monitoring sensor 43 may not be provided.

Further, in addition to the pressure of the low oxygen raw material air, there is a numerical value that correlates with the oxygen concentration of the low oxygen raw material air, and the numerical value that correlates with the oxygen concentration of the low oxygen raw material air is the low oxygen concentration monitoring sensor 41. It may be adopted in place of the oxygen concentration of the low oxygen raw material air detected in.
For example, the following items all correlate with the oxygen concentration of the low oxygen raw material air.
(1) High oxygen raw material air pressure.
(2) Flow rate of low oxygen raw material air.
(3) Flow rate of high oxygen raw material air.
(4) Oxygen concentration of high oxygen raw material air.
(5) Nitrogen concentration in high oxygen raw material air.
Therefore, these may be input to the control device 5 instead of the detection signal of the hypoxia pressure monitoring sensor 60 of each of the above-described embodiments.

FIG. 4 shows a piping system and the like of the training device of another embodiment.
In the training device 80 shown in FIG. 4, a high oxygen pressure monitoring sensor 70 is provided between the second discharge portion 32 and the branch portion 65 of the high oxygen air flow path 36, and the high oxygen pressure monitoring sensor 70 is used. The pressure of the high oxygen raw material air is detected.
In the present embodiment, the signal of the high oxygen pressure monitoring sensor 70 is input to the control device 5.

The pressure of the high oxygen raw material air correlates with the oxygen concentration of the low oxygen raw material air, and when the oxygen concentration of the low oxygen raw material air rises, the pressure of the high oxygen raw material air rises, and conversely, the oxygen concentration of the low oxygen raw material air. When the pressure decreases, the pressure of the high oxygen raw material air decreases.

In the present embodiment, when the oxygen concentration of the low oxygen raw material air is high and the pressure of the high oxygen raw material air detected by the high oxygen pressure monitoring sensor 70 is higher than the preset high oxygen raw material air pressure, the exhaust flow rate The opening degree of the control means 46 is increased, the outlet pressure of the second discharge unit 32 for discharging the high oxygen raw material air tends to decrease, and the oxygen concentration of the low oxygen raw material air decreases.
On the contrary, when the oxygen concentration of the low oxygen raw material air is low and the pressure of the high oxygen raw material air detected by the high oxygen pressure monitoring sensor 70 is lower than the preset high oxygen raw material air pressure, the exhaust flow rate control means. The opening degree of 46 becomes smaller, the outlet pressure of the second discharge unit 32 for discharging the high oxygen raw material air tends to increase, and the oxygen concentration of the low oxygen raw material air increases.

In the embodiment shown in FIG. 4, the low oxygen concentration monitoring sensor 41 and the high oxygen concentration monitoring sensor 43 may not be provided.

As another embodiment, instead of the mode of utilizing the oxygen concentration of the low oxygen raw material air of the embodiment of FIG. 1 and the mode of utilizing the pressure of the low oxygen raw material air of the embodiment of FIG. 3, the low oxygen raw material air It may be in the form of using the flow rate.
Specifically, in the training device 1, instead of the low oxygen concentration monitoring sensor 41 and the low oxygen pressure monitoring sensor 60 provided between the first discharge unit 31 and the mixing unit 33 of the low oxygen air flow path 38, An embodiment in which a flow sensor is provided may be used. In this embodiment, the flow rate sensor detects the flow rate of the low oxygen raw material air discharged from the raw material air generator 26.
In the present embodiment, the signal of the flow rate sensor is input to the flow rate detection unit instead of the oxygen concentration detection unit and the pressure detection unit of the control device 5.

The flow rate of the low oxygen raw material air correlates with the oxygen concentration of the low oxygen raw material air, and when the oxygen concentration of the low oxygen raw material air increases, the flow rate of the low oxygen raw material air tends to increase. On the contrary, when the oxygen concentration of the low oxygen raw material air decreases, the flow rate of the low oxygen raw material air tends to decrease.

In the present embodiment, when the flow rate of the low oxygen raw material air detected by the flow rate sensor is larger than the preset flow rate (when the oxygen concentration of the low oxygen raw material air is high), the opening degree of the exhaust flow rate control means 46 is increased. It becomes large and the oxygen concentration of the low oxygen raw material air decreases.
On the contrary, when the flow rate of the low oxygen raw material air detected by the flow rate sensor is smaller than the preset flow rate (when the oxygen concentration of the low oxygen raw material air is low), the opening degree of the exhaust flow rate control means 46 becomes small. , The oxygen concentration of the hypoxic raw material air rises.

In addition, the flow rate of high oxygen raw material air correlates with the oxygen concentration of low oxygen raw material air, and when the oxygen concentration of low oxygen raw material air increases, the flow rate of high oxygen raw material air decreases, and conversely, the oxygen of low oxygen raw material air. As the concentration decreases, the flow rate of high oxygen raw material air increases.
As another embodiment utilizing this phenomenon, a mode in which the flow rate of the high oxygen raw material air is used may be used instead of the form in which the pressure of the high oxygen raw material air in the embodiment of FIG. 4 is used.
Specifically, in the training device 80, a flow rate sensor may be provided instead of the high oxygen pressure monitoring sensor 70 provided between the second discharge portion 32 and the branch portion 65 of the high oxygen air flow path 36. good. In this embodiment, the flow rate sensor detects the flow rate of the high oxygen raw material air.
In the present embodiment, the signal of the flow rate sensor is input to the flow rate detection unit (not shown) instead of the pressure detection unit of the control device 5.

In the present embodiment, when the flow rate of the high oxygen raw material air detected by the flow rate sensor is smaller than the preset flow rate (when the oxygen concentration of the low oxygen raw material air is high), the opening degree of the exhaust flow rate control means 46 is large. Therefore, the flow rate of the high oxygen raw material air tends to increase, and the oxygen concentration of the low oxygen raw material air decreases.
On the contrary, when the flow rate of the high oxygen raw material air detected by the flow sensor is large (when the oxygen concentration of the low oxygen raw material air is low), the opening degree of the exhaust flow rate control means 46 becomes small, and the flow rate of the high oxygen raw material air becomes small. Decreases, and the oxygen concentration in the low oxygen raw material air rises.

As yet another embodiment, the oxygen concentration of the high oxygen raw material air may be used instead of the oxygen concentration of the low oxygen raw material air.
When the oxygen concentration of the low oxygen raw material air is high, the oxygen concentration of the high oxygen raw material air is low, and when the oxygen concentration of the low oxygen raw material air is low, the oxygen concentration of the high oxygen raw material air is high.
When the oxygen concentration of the high oxygen raw material air is used, the signal of the oxygen concentration sensor 43 provided in the high oxygen air flow path 36 is input to the control device 5.

In the present embodiment, when the oxygen concentration of the high oxygen raw material air detected by the oxygen concentration sensor 43 is lower than the preset oxygen concentration, the opening degree of the exhaust flow rate control means 46 becomes large, and the high oxygen raw material air becomes large. The oxygen concentration tends to increase, and the oxygen concentration of the low oxygen raw material air decreases.
On the contrary, when the oxygen concentration of the high oxygen raw material air detected by the oxygen concentration sensor 43 is higher than the preset oxygen concentration, the opening degree of the exhaust flow rate control means 46 becomes small, and the oxygen concentration of the high oxygen raw material air becomes smaller. Tends to decrease, and the oxygen concentration of the low oxygen raw material air increases.

Instead of the oxygen concentration of the high oxygen raw material air, the nitrogen concentration of the high oxygen raw material air may be used.
That is, in the above-described embodiment, the opening degree of the exhaust flow rate control means 46 is determined by the oxygen concentration of the high oxygen raw material air detected by the oxygen concentration sensor 43 provided in the high oxygen air flow path 36, but oxygen. Instead of the concentration, the nitrogen concentration of the high oxygen raw material air may be detected, and the opening degree of the exhaust flow rate control means 46 may be adjusted according to the nitrogen concentration.
For example, instead of the oxygen concentration sensor 43 provided in the high oxygen air flow path 36 shown in FIG. 1, a nitrogen concentration sensor is provided, and the oxygen concentration of the high oxygen raw material air is indirectly detected by the nitrogen concentration sensor.
When the nitrogen concentration detected by the nitrogen concentration sensor (not shown) provided in the high oxygen air flow path 36 tends to decrease, the oxygen concentration of the low oxygen raw material air discharged from the first discharge unit 31 tends to decrease. It has become.
Therefore, when the nitrogen concentration detected by the nitrogen concentration sensor provided in the high oxygen air flow path 36 becomes lower than the preset nitrogen concentration, the opening degree of the exhaust flow rate control means 46 is changed to be smaller. , Increases the oxygen concentration of low oxygen raw material air.
On the contrary, when the nitrogen concentration detected by the nitrogen concentration sensor provided in the high oxygen air flow path 36 tends to increase, the oxygen concentration of the low oxygen raw material air discharged from the first discharge unit 31 tends to increase. ing.
Therefore, when the nitrogen concentration detected by the nitrogen concentration sensor provided in the high oxygen air flow path 36 rises above the preset nitrogen concentration, the opening degree of the exhaust flow rate control means 46 is increased to increase the opening degree of the low oxygen raw material. Reduces the oxygen concentration in the air.

In the embodiment described above, the opening degree of the exhaust flow rate control means 46 is determined by the oxygen concentration of the low oxygen raw material air detected by the low oxygen concentration monitoring sensor 41 or the like, but the exhaust is exhausted in consideration of other factors. The opening degree of the flow rate control means 46 may be corrected.

For example, the opening degree of the exhaust flow rate control means 46 and the opening degree of the mixed flow rate control means 42a and 42b may be controlled in association with each other.
Specifically, the opening degree of the exhaust flow rate control means 46 is adjusted according to the oxygen concentration of the low oxygen raw material air detected by the low oxygen concentration monitoring sensor 41 described above. Further, when the opening degree of the mixed flow rate control means 42a and 42b becomes large, the opening degree of the exhaust flow rate control means 46 is corrected so that the exhaust flow rate control means 46 is narrowed down. Further, when the opening degree of the mixed flow rate control means 42a and 42b becomes small, the opening degree of the exhaust flow rate control means 46 is corrected so as to open the exhaust flow rate control means 46.
That is, the opening degree of the exhaust flow rate control means 46 is controlled by the opening degree of the mixed flow rate control means 42a and 42b in addition to the oxygen concentration of the low oxygen raw material air detected by the low oxygen concentration monitoring sensor 41.

For example, as calculation items for determining the opening degree of the exhaust flow rate control means 46, there are a control amount based on the oxygen concentration of the low oxygen raw material air and a control amount based on the opening degree of the mixed flow rate control means 42a and 42b. The opening degree of the exhaust flow rate control means 46 is determined by the total of.
The control amount of the opening degree of the exhaust flow rate control means 46 based on the opening degree of the mixing flow rate control means 42a and 42b increases / decreases in inverse proportion to the opening degree of the mixing flow rate control means 42a and 42b. That is, when the opening degree of the mixing flow rate control means 42a and 42b changes in the opening direction, the opening degree of the exhaust flow rate controlling means 46 changes in the closing direction, and when the opening degree of the mixing flow rate controlling means 42a and 42b changes in the closing direction. The opening degree of the exhaust flow rate control means 46 changes in the opening direction.
As a result, the excess high oxygen raw material air is appropriately exhausted from the exhaust flow path 45, and the back pressure applied to the raw material air generator 26 is appropriately controlled.

Nitrogen concentration of low oxygen raw material air, low oxygen raw material air pressure, low oxygen raw material air flow rate, high oxygen raw material air pressure, high oxygen raw material air flow rate, high oxygen raw material air oxygen concentration, high oxygen raw material air nitrogen The same applies to the case where the exhaust flow rate control means 46 is adjusted according to the concentration or the like, and the opening degree of the exhaust flow rate control means 46 may be corrected in consideration of other factors.

In each of the embodiments described above, excess high oxygen raw material air is exhausted to the outside of the system, and the oxygen concentration of the low oxygen raw material air is adjusted by increasing or decreasing the displacement of the high oxygen raw material air. It is a thing. In each of the above-described embodiments, the exhaust flow rate control means 46 is provided in the exhaust flow path 45 as a means for adjusting the exhaust amount of the high oxygen raw material air.
The present invention is not limited to this configuration, and it is also possible to provide the flow rate control means in another flow path that correlates with the oxygen concentration of the low oxygen raw material air.
For example, the flow rates of the following parts all correlate with the oxygen concentration of the low oxygen raw material air.
(1) Between the second discharging section 32 and the mixing sections 33a and 33b.
(2) Between the mixing portions 33a and 33b to the supply destination of low oxygen air (training rooms 2a and 2b).
(3) Between the first discharging section 31 and the mixing sections 33a and 33b.

FIG. 5 is an example in which the flow rate control means 75 is provided between the second discharge section 32 and the mixing sections 33a and 33b, and between the second discharge section 32 and the branch section 65.
In the training device 83 shown in FIG. 5, when the opening degree of the flow rate control means 75 is adjusted, the outlet pressure of the second discharge unit 32 changes, and the oxygen concentration of the low oxygen raw material air changes.
In the embodiment shown in FIG. 5, since the flow rate control means 75 is located upstream of the mixed flow rate control means 42a and 42b and the exhaust flow rate control means 46, the opening degree of the mixed flow rate control means 42a and 42b and the exhaust flow rate control means 46 is open. The outlet pressure of the second discharge unit 32 can be adjusted without being affected by the above. Therefore, the oxygen concentration and pressure of the low oxygen raw material air can be stabilized.

FIG. 6 is an example in which the flow rate control means 76 is provided between the second discharge section 32 and the mixing sections 33a and 33b, and between the branch section 65 and the mixing flow rate control means 42a and 42b.
In the training device 85 shown in FIG. 6, when the opening degree of the flow rate control means 76 is adjusted, the pressure of the second discharge unit 32 changes, and the oxygen concentration of the low oxygen raw material air changes.
In the embodiment shown in FIG. 6, since the flow rate control means 76 is located upstream of the mixed flow rate control means 42a and 42b, the second discharge unit 32 is not affected by the opening degree of the mixed flow rate control means 42a and 42b. The outlet pressure can be adjusted. Therefore, the oxygen concentration and pressure of the low oxygen raw material air can be stabilized.

FIG. 7 is an example in which the flow rate control means 77a and 77b are provided between the mixing portions 33a and 33b to the supply destinations of the low oxygen air (training rooms 2a and 2b).
In the training device 86 shown in FIG. 7, when the opening degree of the flow rate control means 77a and 77b is adjusted, the oxygen concentration of the low oxygen raw material air changes.

FIG. 8 is an example in which the flow rate control means 78 is provided between the first discharge unit 31 and the mixing units 33a and 33b.
In the training device 87 shown in FIG. 8, when the opening degree of the flow rate control means 78 is adjusted, the oxygen concentration of the low oxygen raw material air changes.
In the embodiment shown in FIG. 8, the low oxygen air flow path 38 is provided with the common flow rate control means 78 at the position before branching into the two training rooms 2a and 2b, but the position after branching. The flow rate control means 78 may be individually provided in each of the above.

Although the high oxygen concentration monitoring sensor 43 is shown in FIGS. 5 to 8, the high oxygen concentration monitoring sensor 43 may be omitted.

In the embodiments shown in FIGS. 5 to 8, the oxygen concentration of the low oxygen raw material air is directly detected by the low oxygen concentration monitoring sensor 41, but the following numerical values correlate with the oxygen concentration of the low oxygen raw material air. May be used instead of the detection concentration of the hypoxia concentration monitoring sensor 41.
(1) Pressure of low oxygen raw material air.
(2) High oxygen raw material air pressure.
(3) Flow rate of low oxygen raw material air.
(4) Flow rate of high oxygen raw material air.
(5) Oxygen concentration of high oxygen raw material air.
(6) Nitrogen concentration of low oxygen raw material air.
(7) Nitrogen concentration in high oxygen raw material air.

When the oxygen concentration of the low oxygen raw material air is adjusted by using the detection value of any one of the above numbers (1) to (7), other detection means may be omitted. For example, when the oxygen concentration of the low oxygen raw material air is adjusted by using the detection value of any one of the above numbers (1) to (7), the hypoxia concentration monitoring sensor 41 may not be provided.

When the configuration of the embodiment shown in FIGS. 5 to 8 and the modified example thereof is adopted, the exhaust flow rate control means 46 may not be provided in the exhaust flow path 45. However, since it is not preferable to completely open the exhaust portion 48, it is desirable to provide a member such as a manual throttle that can change the opening degree. A fixed throttle may be provided in the exhaust unit 48.

Even when the flow rate control means 75, 76, 77a, 77b, 78 are arranged at the positions shown in FIGS. 5 to 8, the opening degree of the flow rate control means 75, 76, 77a, 77b, 78 is adjusted to the mixed flow rate control means. It may be controlled in association with the opening degree of 42a and 42b.
For example, the opening degree of the exhaust flow rate control means 75, 76, 77a, 77b, 78 is adjusted according to the oxygen concentration of the low oxygen raw material air detected by the low oxygen concentration monitoring sensor 41. Further, the opening degree of the exhaust flow rate control means 75, 76, 77a, 77b, 78 is corrected according to the opening degree of the mixed flow rate control means 42a, 42b.
That is, the opening degree of the exhaust flow rate control means 75, 76, 77a, 77b, 78 is controlled by the opening degree of the mixed flow rate control means 42a, 42b in addition to the information detected by the low oxygen concentration monitoring sensor 41 or the like.

In the embodiment described above, the detection value detected by the detection means (low oxygen concentration monitoring sensor 41, nitrogen concentration sensor, pressure sensor 60, high oxygen concentration monitoring sensor 43, high oxygen pressure monitoring sensor 70, flow rate sensor, etc.) is determined. The opening degree of the flow rate control means (exhaust flow rate control means 46, flow rate control means 75, flow rate control means 76, flow rate control means 77a, 77b, flow rate control means 78, etc.) is controlled so as to be within a constant value or a certain range. To. That is, in the above-described embodiment, the detection value of the detection means is used as it is, and the opening degree of the flow rate control means is controlled so that the detection value falls within a certain value or a certain range.
However, the present invention is not limited to this configuration, and other physical quantities are calculated or estimated from the physical quantities detected by a specific detection means, and the flow rate is controlled so that this value falls within a constant value or a constant range. The opening degree of the means may be controlled.
For example, the oxygen concentration (other physical quantities) of the hypoxic raw material air is calculated based on the pressure (detected physical quantity) of the low oxygen raw material air detected by the pressure sensor 60, and this value is a constant value or a constant range. The opening degree of the flow control means may be controlled so as to fit in the above.

In the embodiment described above, the low oxygen air flow path 38 is provided with the constant flow rate means (needle valve) 61a and 61b, but the constant flow rate means (needle valve) 61a and 61b may not be provided. Further, the constant flow rate means is not limited to the needle valve, and may be a damper or the like whose opening degree can be adjusted. Further, the constant flow rate means is provided in the pipes branched into the two training rooms 2a and 2b, respectively, but the present invention is not limited to this, and one may be provided in the pipe before the branch.

In the embodiment described above, the high oxygen raw material air and the low oxygen raw material air are mixed in the pipeline, but a mixing portion having a larger volume is provided, and the high oxygen raw material air and the low oxygen raw material air are introduced into the mixing portion. May be good.
Further, the high oxygen raw material air and the low oxygen raw material air may be individually introduced into the training rooms 2a and 2b, and the high oxygen raw material air and the low oxygen raw material 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 unit.

In the embodiment described above, the mixed flow rate control means 42a and 42b are provided in the high oxygen air flow path 36, the exhaust flow rate control means 46 is provided in the exhaust flow rate 45, and the high oxygen raw material generated by the raw material air generator 26 is provided. The air was divided into those mixed in the main flow path 23 and those exhausted to the outside of the system.
As another measure, a damper (flow rate control means) whose opening degree can be adjusted is provided at the branch portion 65 of the high oxygen air flow path 36 and the exhaust flow path 45, and the high oxygen raw material air is mixed with the main flow path 23. It may be distributed to the one to be exhausted.

In the embodiment described above, the hypoxic mixed air is supplied from the low oxygen air supply device 3 to two locations, the training rooms 2a and 2b, but even if the low oxygen mixed air is supplied to only one training room 2. Often, more training room 2 may be supplied with hypoxic mixed air.
In the embodiment described above, the hypoxic mixed air is supplied to the training rooms 2a and 2b as an example of the use of 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. It's not a thing. For example, low oxygen mixed air may be supplied to a suction mask or a test device.

Further, the low oxygen air supply device 3 may be provided with a carbon dioxide removing device. It is desirable that the carbon dioxide removing device be provided in the high oxygen air flow path 36. According to this embodiment, carbon dioxide can be removed from the high oxygen raw material air to reduce the amount of carbon dioxide.

1, 80, 82, 83, 85, 86, 87 Training device 2a 1st training room 2b 2nd training room 3 Low oxygen air supply device 5 Control device 13 Indoor oxygen concentration monitoring sensor 26 Raw material air generator (special air generator)
30 Air inlet 31 1st discharge section 32 2nd discharge section 33a, 33b Mixing section 36 High oxygen air flow path 38 Low oxygen air flow path 41 Low oxygen concentration monitoring sensor 42a Mixing flow control means 42b Mixing flow control means 43 High oxygen Concentration monitoring sensor 45 Exhaust flow path 46 Exhaust flow control means 48 Exhaust part 51 Gas separation membrane (gas separation member)
60 Low oxygen pressure monitoring sensor 65 Branch 70 High oxygen pressure monitoring sensor 75 Flow control means 76 Flow control means 77a, 77b Flow control means 78 Flow control means

Claims (8)

It is a low oxygen air supply device that supplies low oxygen air with a lower oxygen concentration than raw material air.
Has a special air generator,
The special air generator has a gas separating member capable of separating nitrogen and oxygen, and has an air introduction port, a first discharge part, and a second discharge part, and is a raw material from the air introduction port. Air is introduced, low oxygen raw material air having a lower oxygen concentration than the raw material air is discharged from the first discharge section, and high oxygen raw material air having a higher oxygen concentration than the raw material air is discharged from the second discharge section. It is a thing
A mixing unit that mixes the low oxygen raw material air and the high oxygen raw material air to generate a low oxygen mixed air having a lower oxygen concentration than the raw material air.
Exhaust part that exhausts excess high oxygen raw material air to the outside of the system,
A detection means for detecting any of the oxygen concentration, nitrogen concentration, pressure, or flow rate of the low oxygen raw material air.
The flow rate control means provided at any position in the first group,
A hypoxic air supply device comprising: a control means for controlling the flow rate control means based on a detection value of the detection means.
Group 1 (1) Between the second exhaust section and the exhaust section.
(2) Between the second discharging section and the mixing section.
(3) Between the mixing section and the supply destination of the low oxygen air.
(4) Between the first discharging section and the mixing section. The low oxygen air supply device according to claim 1, wherein the detection means is an oxygen concentration detecting means provided between the first discharging section and the mixing section. It is a low oxygen air supply device that supplies low oxygen air with a lower oxygen concentration than raw material air.
Has a special air generator,
The special air generator has a gas separating member capable of separating nitrogen and oxygen, and has an air introduction port, a first discharge part, and a second discharge part, and is a raw material from the air introduction port. Air is introduced, low oxygen raw material air having a lower oxygen concentration than the raw material air is discharged from the first discharge section, and high oxygen raw material air having a higher oxygen concentration than the raw material air is discharged from the second discharge section. It is a thing
A mixing unit that mixes the low oxygen raw material air and the high oxygen raw material air to generate a low oxygen mixed air having a lower oxygen concentration than the raw material air.
Exhaust part that exhausts excess high oxygen raw material air to the outside of the system,
A detection means for detecting any of the oxygen concentration, nitrogen concentration, pressure, or flow rate of the high oxygen raw material air.
The flow rate control means provided at any position in the first group,
A hypoxic air supply device comprising: a control means for controlling the flow rate control means based on a detection value of the detection means.
Group 1 (1) Between the second exhaust section and the exhaust section.
(2) Between the second discharging section and the mixing section.
(3) Between the mixing section and the supply destination of the low oxygen air.
(4) Between the first discharging section and the mixing section. A high oxygen air flow path from the second discharge section to the mixing section,
It has an exhaust path branched from the high oxygen air flow path to the exhaust section.
The low oxygen air supply device according to any one of claims 1 to 3, wherein the flow rate control means is provided in the exhaust passage. A high oxygen air flow path from the second discharge section to the mixing section,
The branch portion that branches the high oxygen air flow path and
It has an exhaust path that is branched at the branch portion and reaches the exhaust portion.
The low oxygen air supply device according to any one of claims 1 to 3, wherein the flow rate control means is provided between the second discharge portion and the branch portion. It has a mixing flow rate controlling means for controlling the amount of the high oxygen raw material air mixed with the low oxygen raw material air.
The low oxygen air supply device according to any one of claims 1 to 5, wherein the opening degree of the flow rate control means and the opening degree of the mixed flow rate control means are controlled in association with each other. It has a mixing flow rate controlling means for controlling the amount of the high oxygen raw material air mixed with the low oxygen raw material air.
The low oxygen air supply device according to any one of claims 1 to 6, wherein the mixed flow rate control means is controlled based on the oxygen concentration in the flow path after the mixing unit. It is possible to have a training room in which a person can exercise internally and a hypoxic air supply device according to any one of claims 1 to 7, and to make the inside of the training room a hypoxic environment having a lower oxygen concentration than the raw material air. A training device characterized by being possible.

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