Oxygen supply system

Abstract

This technology provides a way to efficiently increase oxygen concentration around the user's face. [Solution] The oxygen supply system comprises a housing 5 having a sleeping space 10 as an internal space, an oxygen supply device for supplying oxygen to the sleeping space 10, and a ventilation device for ventilating the air in the sleeping space 10. The housing 5 includes an oxygen supply port 304 connected to the oxygen supply device for supplying oxygen to the sleeping space 10, and a ventilation port 404 connected to the ventilation device 400 for exhausting the air in the sleeping space 10. The ventilation port 404 is formed to be located above the oxygen supply port 304.

Description

Technical Field

[0001] The present disclosure is an oxygen supply system that supplies oxygen to a sleep space where a user sleeps.

Background Art

[0002] A respiratory gas supply device supplies oxygen according to the breathing cycle of a user. This respiratory gas supply device is used for oxygen inhalation therapy and saves the amount of oxygen used by adjusting the concentration of oxygen according to the breathing of the user (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The relaxation state and excitement state of a user are induced by the oxygen concentration. Further, by inducing the relaxation state and excitement state of the user, it may be possible to provide the user with comfortable sleep. In order to induce a relaxation state in the user, it is effective to increase the oxygen concentration of the air inhaled by the user. However, there is a problem that it is difficult to increase the oxygen concentration in a ventilated space.

[0005] Therefore, the present disclosure solves the above problems and aims to provide a technique that makes it easy to efficiently increase the oxygen concentration around the face of a user.

Means for Solving the Problems

[0006] To solve the above problems, an oxygen supply system according to one embodiment of the present disclosure comprises a housing having a sleeping space as an internal space, an oxygen supply device for supplying oxygen to the sleeping space, and a ventilation device for ventilating the air in the sleeping space. The housing includes an oxygen supply port connected to the oxygen supply device for supplying oxygen to the sleeping space, and a ventilation port connected to the ventilation device for exhausting the air in the sleeping space, the ventilation port being located above the oxygen supply port.

[0007] Furthermore, any combination of the above components, as well as conversions of the expressions of this disclosure between methods, apparatus, systems, recording media, computer programs, etc., are also valid as aspects of this disclosure. [Effects of the Invention]

[0008] According to this disclosure, it is possible to create a localized, high-concentration oxygen space around the user's face. [Brief explanation of the drawing]

[0009] [Figure 1] This diagram shows the configuration of an oxygen supply system according to Example 1 or a modified example. [Figure 2] This diagram shows the configuration of the sleeping space, as shown in Figure 1. [Figure 3] Figure 2 is a side view taken from direction A. [Figure 4] This figure shows an overview of the process using the oxygen supply system shown in Figure 1. [Figure 5] This diagram shows the configuration of the sleeping space in a modified version. [Figure 6] Figure 5 is a side view taken from direction B. [Modes for carrying out the invention]

[0010] (Example 1) Before specifically describing the embodiments of this disclosure, an overview of the embodiments will be provided. This embodiment relates to an oxygen supply system that provides a user with comfortable sleep onset and wake-up by controlling the oxygen concentration in the space in which the user sleeps (hereinafter referred to as the "sleep space"). Generally, a higher oxygen concentration induces a relaxed state in the user, while a lower oxygen concentration induces an excited state. The oxygen supply system according to this embodiment utilizes the relationship between oxygen concentration and the user's state to increase the oxygen concentration when falling asleep and decrease the oxygen concentration when waking up.

[0011] The embodiments described below all represent preferred specific examples of the present disclosure. Therefore, the numerical values, shapes, materials, components, arrangement and connection configurations of components, as well as the steps (processes) and their order shown in the following embodiments are examples and are not intended to limit the present disclosure. Accordingly, among the components in the following embodiments, those components that are not described in the independent claims representing the highest-level concepts of the present disclosure will be described as optional components. In addition, substantially identical components are denoted by the same reference numerals in each figure, and redundant explanations are omitted or simplified.

[0012] First, please refer to Figures 1, 2, and 3 to explain the overview of the oxygen supply system 1000.

[0013] Figure 1 is a diagram illustrating the configuration of the oxygen supply system 1000. The oxygen supply system 1000 is a system for supplying oxygen to the inside of the housing 5 that constitutes the sleeping space 10 where the user sleeps, and includes an oxygen sensor 105, a CO2 sensor 106, a control device 200, an oxygen supply device 300, and a ventilation device 400. Figure 2 shows the configuration of the sleeping space 10 in Figure 1 in more detail. The sleeping space 10 includes an entrance / exit 12, and the sleeping space 10 is equipped with an opening / closing door 13, an oxygen sensor 105, a CO2 sensor 106, an oxygen supply port 304, an oxygen flow path adjustment unit 305, an oxygen supply duct 302, a ventilation port 404, an outside air port 410, and a ventilation duct 402.

[0014] Figure 3 is a side view of Figure 2 as seen from direction A. Here, direction A is the direction when the rear side surface 11c, which will be described later, is viewed from the inside of the sleeping space 10. The oxygen sensor 105, CO2 sensor 106, oxygen supply port 304, oxygen flow path adjustment unit 305, and ventilation port 404 are installed on the surface of the rear side surface 11c, or at a position that protrudes from the rear side surface 11c toward the sleeping space 10.

[0015] The sleeping space 10 is the internal space of the housing 5 (capsule) partitioned by the top surface, floor surface, and multiple sides. In Figure 2, the top surface of the sleeping space 10 is defined as the top surface 11a, and the floor surface as the floor surface 11b. Also, if we consider the side closer to the entrance 12 as the front side and the side further from the entrance 12 as the back side, then the back side, which is the left side in Figure 2, is defined as the rear side surface 11c, and the front side, which is the right side in Figure 2, is defined as the front side surface 11d. Furthermore, in Figure 3, which is Figure 2 viewed in direction A, the left side is defined as the left side surface 11e, and similarly the right side is defined as the right side surface 11f. An openable and closable entrance 12 is provided on the front side surface 11d of the housing 5. By opening the entrance 12, the user 20 can enter the sleeping space 10 from the outside or exit the sleeping space 10 from the inside to the outside. When the user 20 stays inside the sleeping space 10, they close the entrance 12 using the openable and closable door 13, which will be described later. When sleeping, user 20 lies on their side with their head 22 facing the side opposite to the side where the entrance 12 is located. In Figure 2, the user is lying down with their head 22 close to the rear side 11c.

[0016] The opening / closing door 13 is a plate-shaped member used to open and close the entrance / exit 12 of the sleeping space 10. The opening / closing door 13 is positioned on the front side 11d and is positioned to cover the entrance / exit 12 when closed. The shape of the opening / closing door 13 is not limited as long as it can cover the entrance / exit 12, such as a roll curtain or a lid. Note that the opening / closing door 13 does not need to cover the entire entrance / exit 12 when closed. A part of the entrance / exit 12 may be open when the opening / closing door 13 is closed.

[0017] The oxygen sensor 105 is a sensor for acquiring the oxygen concentration near the head 22 of the user 20 in the sleep space 10. The oxygen sensor 105 is connected to the control device 200 and outputs the acquired oxygen concentration in the space of the sleep space 10 to the control device 200. The CO2 sensor 106 is a sensor for acquiring the CO2 concentration near the head 22 of the user 20 in the sleep space 10. The CO2 sensor 106 is connected to the control device 200 and outputs the acquired CO2 concentration in the space of the sleep space 10 to the control device 200. It is preferable to arrange the oxygen sensor 105 and the CO2 sensor 106 so that the sensor does not directly touch the oxygen flow 306 described later. For example, as shown in FIG. 3, it is preferable to arrange the oxygen sensor 105 and the CO2 sensor 106 at a position shifted to the left side surface 11e side or the right side surface 11f side so as to avoid directly below the oxygen supply port 304. By adopting such a configuration, it is possible to reliably measure the space concentrations of oxygen and CO2. Since known technologies may be used for the oxygen sensor 105 and the CO2 sensor 106, the description thereof is omitted here.

[0018] The oxygen supply device 300 is a device that is connected to the control device 200 and blows out oxygen while adjusting the oxygen concentration according to an instruction from the control device 200. The oxygen supply device 300 is connected to a tubular oxygen supply duct 302, and the oxygen supply duct 302 is connected to an oxygen supply port 304. Further, the oxygen supply port 304 is connected to an oxygen flow path adjustment unit 305 described later. The oxygen blown out from the oxygen supply device 300 is supplied to the sleep space 10 as an oxygen flow 306 through the oxygen supply duct 302, from the oxygen supply port 304, and via the oxygen flow path adjustment unit 305. Details of the flow of the oxygen flow 306 will be described later.

[0019] The oxygen supply port 304 is installed on the rear side 11c of the sleeping space 10, and oxygen is supplied towards the interior of the sleeping space 10. The oxygen supply port 304 is positioned on the floor 11b side of the ventilation port 404 (described later) in order to efficiently increase the oxygen concentration near the user's head 22. In other words, the oxygen supply port 304 is positioned below the ventilation port 404. With this configuration, even when the sleeping space 10 is ventilated by the ventilation device 400 (described later), the oxygen supplied from the oxygen supply port 304 is less likely to be exhausted from the ventilation port 404. The oxygen supply port 304 may be placed on the left side 11e, right side 11f, or floor 11b of the sleeping space 10, as long as it is on the floor 11b side of the ventilation port 404 (described later). However, in order to efficiently supply oxygen near the user's head 22, it is preferable to position the oxygen supply port 304 close to the rear side 11c, even when it is placed on the left side 11e, right side 11f, or floor 11b.

[0020] The oxygen flow path adjustment unit 305 is a component that facilitates the guidance of the oxygen flow 306 towards the vicinity of the user's head 22 (towards the floor surface 11b of the sleeping space 10). The oxygen flow path adjustment unit 305 is, for example, a tubular component that protrudes from the oxygen supply port 304 in Figure 2 into the inside of the sleeping space 10. Here, the tubular component may be a component whose angle can be flexibly adjusted. In other words, the configuration may allow the direction of the tip of the tubular component to be freely changed. With such a configuration, the user 20 can adjust the angle of the oxygen flow path adjustment unit 305 to guide oxygen towards the vicinity of the head 22. The tip of the oxygen flow path adjustment unit 305 may be fixed in a position facing the floor surface 11b as shown in Figure 2. Furthermore, the oxygen flow path adjustment unit 305 is not limited to a tubular component. For example, the oxygen flow path adjustment unit 305 may be a plate-shaped louver provided inside the oxygen supply port 304. In this shape, the oxygen flow 306 can be guided to the floor surface 11b by adjusting the angle so that the plate-shaped tip faces the floor surface 11b. Alternatively, the oxygen flow path adjustment unit 305 may be a plate-shaped rectifier that protrudes inward into the sleeping space 10 so as to cover the upper end of the oxygen supply port 304. With this configuration as well, the oxygen flow 306 can be efficiently guided toward the floor surface 11b side of the sleeping space 10. Furthermore, by protruding inward into the sleeping space 10 so as to cover the upper end of the oxygen supply port 304, the oxygen flow path adjustment unit 305 can be positioned between the oxygen supply port 304 and the ventilation port 404. In this configuration, the flow path between the oxygen supply port 304 and the ventilation port 404 is blocked by the oxygen flow path adjustment unit 305, making it difficult for the oxygen flow 306 blown out from the oxygen supply port 304 to be exhausted from the ventilation port 404. As described above, the oxygen flow path adjustment unit 305 controls the direction of the oxygen (oxygen flow 306) blown out from the oxygen supply port 304 so that it is directed downwards in the sleeping space 10. The oxygen flow 306 blown downwards in the sleeping space 10 diffuses along the floor surface 11b near the floor surface 11b, so the oxygen concentration is higher below the sleeping space 10 than above the sleeping space 10. In particular, the oxygen concentration is highest near the rear side surface 11c close to the oxygen supply port 304 and near the floor surface 11b, so the user 20 lying down as shown in Figure 2 can efficiently inhale the supplied oxygen.

[0021] The ventilation device 400 is connected to the control device 200 and is a device that performs ventilation according to instructions from the control device 200. The ventilation device 400 is connected to a ventilation duct 402, and the ventilation duct 402 is connected to a ventilation port 404. The ventilation device 400 exhausts the air in the sleep space 10 through the ventilation port 404 and the ventilation duct 402. When the air in the sleep space 10 is exhausted, fresh air is taken in from the outside air port 410. The outside air taken in from outside the sleep space 10 ventilates the sleep space 10 as an air flow 600. If ventilation is not performed in the sleep space 10, respiratory components such as CO2 exhaled from the user 20 will remain in the space. Therefore, it is preferable that the ventilation device 400 operates constantly to ventilate respiratory components such as CO2. The detailed air flow of the air flow 600 will be described later.

[0022] The ventilation port 404 is an exhaust port for exhausting the air inside the sleep space 10. In FIG. 2, the ventilation port 404 is installed on the rear side surface 11c. As described above, the ventilation port 404 is installed above the oxygen supply port 304 (on the ceiling surface 11a side of the sleep space 10 with respect to the oxygen supply port 304).

[0023] The outside air port 410 is an outside air inlet for taking in air from outside the sleep space 10. In FIG. 2, the outside air port 410 is arranged above the front side surface 11d of the sleep space 10. Note that the outside air port 410 may be provided directly on the front side surface 11d, or a part of the entrance / exit 12 may be treated as the outside air port 410. In FIG. 2, by deliberately making the opening / closing door 13 smaller with respect to the entrance / exit 12, even when the opening / closing door 13 is in a fully closed state, the upper part of the entrance / exit 12 is in an open state. Thus, the opening composed of the closed opening / closing door 13 and the entrance / exit 12 may be treated as the outside air port 410. Also, an opening may be provided in a part of the opening / closing door 13.

[0024] Next, the oxygen flow 306 and air flow 600 will be explained in detail. Here, as shown in Figure 2, the oxygen supply port 304 is located below the rear side surface 11c. The ventilation port 404 is located above the oxygen supply port 304 on the rear side surface 11c. The outside air port 410 is located on the front side surface 11d opposite the ventilation port 404.

[0025] First, let's explain the oxygen flow 306. The oxygen flow 306 flows towards the floor surface 11b of the sleeping space 10 via the oxygen supply port 304 and the oxygen flow path adjustment unit 305. At this time, it flows in a way that increases the oxygen concentration on the floor surface 11b side in the height direction of the sleeping space 10, including the area around the head 22. Specifically, the oxygen flow 306 that is blown out via the oxygen supply port 304 and the oxygen flow path adjustment unit 305 has a higher concentration of oxygen than the sleeping space 10, and the blown-out oxygen diffuses downwards in the sleeping space 10. In this way, the diffusion of high-concentration oxygen downwards in the sleeping space 10 results in a higher oxygen concentration below the sleeping space 10 compared to the oxygen concentration above the sleeping space 10 and the oxygen concentration outside the sleeping space 10.

[0026] Next, the airflow 600 will be described. The airflow 600 flows from the front side 11d to the rear side 11c of the sleeping space 10. More specifically, the airflow 600 flows from the outside air inlet 410 to the ventilation opening 404, powered by the ventilation device 400. Here, the outside air inlet 4 10 and the ventilation opening 404 are positioned above the oxygen supply opening 304. Therefore, as shown in Figure 2, the airflow 600 flows over the sleeping space 10. In other words, it replaces the air in the sleeping space 10 while avoiding the area below the sleeping space 10 where the oxygen flow 306 is diffused. In this way, the airflow 600 flows above the user 20 (towards the top surface 11a of the sleeping space 10), taking in CO2 and other substances exhaled by the user 20 and exhausting them to the outside. Here, there is no blower installed in the outside air opening 410. Therefore, as the air in the sleeping space 10 is expelled through the ventilation opening 404, the sleeping space 10 becomes negatively pressurized, and outside air flows into the sleeping space 10 through the outside air opening 410. The outside air entering through the outside air inlet 410 gradually tries to move downwards in the sleeping space 10 as it moves away from the outside air inlet 410, as shown by the airflow 600 in Figure 2. However, the power of the ventilation device 400 causes it to move upwards in the sleeping space 10 again and is discharged from the ventilation opening 404. An additional blower corresponding to the outside air inlet 410 may also be installed. By forcefully drawing in outside air through the outside air inlet 410, the outside air is less likely to move downwards, so the airflow 600 interferes less with the oxygen flow 306 than in the configuration shown in Figure 2. Increasing the exhaust volume by the ventilation device 400 also makes it less likely for the outside air to move downwards, so the airflow 600 interferes less with the oxygen flow 306 than in the configuration shown in Figure 2.

[0027] Based on the above configuration, the relationship between the airflow 600 and the oxygen flow 306 will now be explained. The airflow 600 mainly flows along the upper surface 11a side of the sleeping space 10 in the height direction (towards the upper surface 11a from the oxygen supply port 304), while the oxygen flow 306 mainly flows along the lower surface 11b side of the sleeping space 10 in the height direction (towards the lower surface 11b from the oxygen supply port 304). CO2 exhaled by the user flows into the space where the airflow 600 is dominant (towards the upper surface 11a side of the sleeping space 10 in the height direction) along with some of the oxygen flow 306, and is exhausted from the ventilation port 404.

[0028] In contrast, in the space where the oxygen flow 306 is dominant (the floor surface 11b side in the height direction of the sleeping space 10), the oxygen concentration is higher compared to the ceiling surface 11a side in the height direction of the sleeping space 10 due to the oxygen flow 306. This is because the ventilation openings 404 and outside air openings 410 are positioned so that the ventilation airflow 600 does not interfere with the lower part of the sleeping space 10. In conventional ventilation designs, it was common to position the ventilation openings and outside air openings to replace the air in the entire space. For example, by positioning either the ventilation opening 404 or the outside air opening 410 below the oxygen supply opening 304, the airflow 600 flows from the bottom to the top of the sleeping space 10, as in conventional designs. However, in such conventional designs, the air in the entire sleeping space 10 is exhausted, which presents the problem of exhausting the oxygen supplied from the oxygen supply opening 304 as well. In other words, in conventional designs, it was difficult to increase the oxygen concentration on the floor surface 11b side where the user 20 is located. In the configuration of this invention, the ventilation openings 404 and outside air openings 410 are deliberately positioned so that the airflow 600 flows above the sleeping space 10 rather than over the entire sleeping space 10, thereby suppressing the exhaust of oxygen by the airflow 600 from the ventilation openings 404. This makes it possible to maintain a high oxygen concentration on the floor surface 11b where the user 20 lies.

[0029] Furthermore, it is preferable to position the user's head 22 closer to the rear side 11c. This is because positioning the user's head 22 closer to the rear side 11c reduces the distance to the ventilation opening 404 compared to positioning it closer to the front side 11d. With this arrangement, the distance to the ventilation opening 404 is reduced, making it easier to exhaust the CO2 exhaled by the user 20. By efficiently exhausting CO2, the ventilation rate of the sleeping space 10 can be reduced. In other words, the output of the ventilation device 400 can be reduced. By reducing the output of the ventilation device 400, excessive exhaust is suppressed, and excessive exhaust of oxygen supplied from the oxygen supply device 300 can also be suppressed, making it possible to maintain a high oxygen concentration on the floor surface 11b side where the user 20 is located.

[0030] Furthermore, it is preferable that the ventilation opening 404 and the outside air opening 410 are arranged facing each other as shown in Figure 2. With this arrangement, outside air drawn in from the outside air opening 410 flows through the ventilation opening 4 Because it is smoothly guided to 04, the airflow 600 is less likely to go downwards. In other words, interference of the airflow 600 with the sleeping space 10 can be suppressed. Note that the arrangement of the ventilation opening 404 and the outside air opening 410 is not limited to facing each other. They can be arranged in any way as long as they are positioned above the oxygen supply opening 304. For example, both the ventilation opening 404 and the outside air opening 410 may be placed on the top surface 11a, or the ventilation opening 404 may be placed on the rear side surface 11c and the outside air opening 410 on the right side surface 11f.

[0031] Next, the control of the oxygen supply system 1000 will be described with reference to Figure 4. Figure 4 shows the configuration of the control device 200. The control device 200 includes an oxygen concentration acquisition unit 201, a CO2 concentration acquisition unit 202, an oxygen concentration control unit 210, and a CO2 concentration control unit 212.

[0032] The oxygen concentration acquisition unit 201 acquires the oxygen concentration of the sleep space 10 detected by the oxygen sensor 105. The oxygen concentration acquisition unit 201 is connected to the oxygen concentration control unit 210.

[0033] The CO2 concentration acquisition unit 202 acquires the CO2 concentration of the sleep space 10 obtained by the CO2 sensor 106. The CO2 concentration acquisition unit 202 is connected to the CO2 concentration control unit.

[0034] The oxygen concentration control unit 210 is connected to the oxygen supply device 300 and the ventilation device 400 and controls the oxygen concentration in the sleep space 10. For example, if the value obtained by the oxygen sensor 105 is lower than the target oxygen concentration in the sleep space 10, the oxygen concentration control unit 210 increases the amount of oxygen blown out from the oxygen supply device 300. By making the target oxygen concentration higher than that outside the sleep space 10, the oxygen concentration in the sleep space 10 is made higher than the oxygen concentration before the user 20 entered the sleep space 10 (the oxygen concentration outside the sleep space 10). If the value obtained by the oxygen sensor 105 is higher than the target oxygen concentration in the sleep space 10, the amount of oxygen blown out from the oxygen supply device 300 may be reduced. Also, if it is necessary to quickly reduce the oxygen concentration in the sleep space 10, the output of the ventilation device 400 may be increased to lower the oxygen concentration in the sleep space 10.

[0035] The CO2 concentration control unit 212 is connected to the ventilation device 400 and controls the CO2 concentration in the sleeping space 10. Specifically, the CO2 concentration control unit 212 adjusts the CO2 concentration by controlling the airflow of the ventilation device 400 based on the value detected by the CO2 sensor 106. For example, if the value obtained by the CO2 sensor 106 is lower than the target CO2 concentration in the sleeping space 10, the CO2 concentration control unit 212 decreases or maintains the airflow of the ventilation device 400. Conversely, if the value obtained by the CO2 sensor 106 is higher than the target CO2 concentration in the sleeping space 10, the airflow of the ventilation device 400 is increased.

[0036] Here, the specific control operation of the oxygen concentration control unit 210 will be described. In addition to control based on the value obtained from the oxygen sensor 105 mentioned above, the oxygen concentration control unit 210 can increase the amount of oxygen discharged from the oxygen supply device 300 at fixed timings or by the user 20's operation. Here, when the value measured by the oxygen sensor 105 reaches the target oxygen concentration, the amount of oxygen discharged from the oxygen supply device 300 is reduced. Note that stopping the oxygen supply device 300 and setting the amount of oxygen discharged to zero is also included in reducing the amount of oxygen discharged. In addition to the above example, the control of the amount of oxygen discharged using the oxygen supply device 300 may also be initiated by using a human presence sensor that can detect the presence of the user 20 in the room, or an imaging device that can confirm that the user has fallen asleep, etc.

[0037] As described above, the oxygen supply system 1000 according to this embodiment 1 can be enjoyed with the following effects.

[0038] (1) The oxygen supply system 1000 has a housing 5 which has a sleeping space 10 as an internal space and The housing 5 comprises an oxygen supply device 300 for supplying oxygen to the sleeping space 10 and a ventilation device 400 for ventilating the air in the sleeping space 10. The housing 5 is equipped with an oxygen supply port 304 connected to the oxygen supply device 300 for supplying oxygen to the sleeping space 10, and a ventilation port 404 connected to the ventilation device 400 for exhausting the air in the sleeping space 10. The ventilation port 404 is positioned above the oxygen supply port 304.

[0039] With this configuration, compared to the case where the ventilation opening 404 is located below the oxygen supply opening 304, the exhaust of oxygen from the ventilation opening 404 on the airflow 600 can be suppressed. More specifically, if the ventilation opening 404 is located below the oxygen supply opening 304, the oxygen supplied from the oxygen supply opening 304 will be exhausted from the ventilation opening 404 on the airflow 600 before it reaches the vicinity of the user's head 22 as an oxygen flow 306. In other words, the oxygen concentration will not rise easily. With this configuration, the ventilation opening 404 is positioned above the oxygen supply opening 304. In other words, the airflow 600 flows above the oxygen supply opening 304. Therefore, the airflow 600 is less likely to interfere with the oxygen flow 306, and the vicinity of the user's head 22 can be maintained at a high oxygen concentration. This makes it possible to maintain a high oxygen concentration on the floor surface 11b side where the user 20 is located. Thus, a localized high-concentration oxygen space can be created around the user's face.

[0040] (2) The oxygen supply system 1000 is provided with an outside air inlet 410 in the housing 5 for taking in outside air, which is outside air from the sleeping space 10, into the sleeping space 10, and the outside air inlet 410 may be configured to be located above the oxygen supply inlet 304.

[0041] With this configuration, compared to the case where the oxygen supply port 304 is located above the outside air port 410, it is possible to suppress the exhaust of oxygen from the outside air port 410 to the ventilation port 404 by being carried by the airflow 600. In conventional ventilation concepts, it was common to arrange the ventilation port and outside air port in such a way that the air in the entire space is replaced. With this configuration, since both the outside air port 410 and the ventilation port 404 are located above the oxygen supply port 304, the airflow 600 is less likely to flow below the sleeping space 10. In other words, the airflow 600 is less likely to interfere with the oxygen flow 306, and the area around the user's head 22 can be maintained at a high oxygen concentration. As a result, it is possible to maintain a high oxygen concentration on the floor surface 11b side where the user 20 is located. Therefore, a localized high-concentration oxygen space can be created around the user's face.

[0042] If the outside air inlet 410 is not provided, the ventilation rate of the ventilation device 400 needs to be increased to promote the exhaust of CO2 generated by the user 20. When the ventilation rate is increased, the flow rate of the airflow 600 flowing through the sleeping space 10 increases, so the oxygen flow 306 is also more easily exhausted through the ventilation inlet 404, and the oxygen concentration does not rise easily. Therefore, with this configuration, the ventilation rate of the ventilation device 400 can be reduced by providing the outside air inlet 410. In other words, it is possible to suppress the decrease in oxygen concentration, which is preferable.

[0043] (3) The oxygen supply system 1000 may be configured to include an oxygen flow path adjustment unit 305 that controls the direction of oxygen blown out from the oxygen supply port 304 downward.

[0044] With this configuration, compared to a system without the oxygen flow path adjustment unit 305, it becomes possible to reliably blow oxygen towards the user's head 22. This makes it possible to further increase the oxygen concentration on the floor surface 11b where the user 20 is located. Therefore, a high-concentration oxygen space can be efficiently created around the user's face. In addition, by directing the blown oxygen downwards, interference with the airflow 600 flowing above the sleeping space 10 can be avoided, and oxygen exhaust can be suppressed.

[0045] (4) The oxygen supply system 1000 is connected to the floor surface 11b of the housing 5 having the sleeping space 10, and the floor The structure is divided by a top surface 11a facing surface 11b and multiple side surfaces (rear side surface 11c, front side surface 11d, left side surface 11e, right side surface 11f) connecting the floor surface 11b and the top surface 11a. The outside air opening 410 may be provided on one of the multiple side surfaces (the rear side surface 11c in Figure 2), and the ventilation opening 404 may be provided on the opposing surface facing that one side surface (the front side surface 11d in Figure 2).

[0046] With this configuration, compared to a case where the outside air inlet 410 and ventilation opening 404 are not located on opposing surfaces, the airflow 600 flows in a straight line, making it less likely to interfere with the oxygen flow 306. This makes it easier to maintain a higher oxygen concentration on the floor surface 11b where the user 20 is located. Therefore, a localized high-concentration oxygen space can be created around the user 20's face. (modified version) Next, a modified example will be described with reference to Figures 5 and 6. The modified example relates to an oxygen supply system 1000 similar to that of Example 1. In the oxygen supply system 1000 of Example 1, the ventilation opening 404 is located on the rear side 11c of the sleeping space 10, and the outside air outlet 410 is located on the front side 11d above the opening / closing door 13. On the other hand, the oxygen supply system 1000 of the modified example has a different arrangement of the ventilation opening 404 and the outside air outlet 410. Note that the control device 200 in the modified example has the same configuration as in Figures 1 and 4, so its description will be omitted. Here, the differences from Example 1 will be explained in detail.

[0047] Figure 5 is a diagram showing in detail the configuration of a modified sleeping space 10a. Similar to Example 1, the sleeping space 10a includes an entrance / exit 12, and is equipped with an opening / closing door 13a, an oxygen sensor 105, a CO2 sensor 106, an oxygen supply port 304, an oxygen flow path adjustment unit 305, an oxygen supply duct 302, a ventilation opening 404a, and an outside air opening 410a. In Figure 5, the top surface of the sleeping space 10a is referred to as the top surface 11g, the floor surface as the floor surface 11h, the left depth side in Figure 5 as the rear side surface 11i, and the right side in Figure 5 as the front side surface 11j. Also, the left side of the rear side surface 11i in Figure 5 when viewed from the front inside the sleeping space 10 is referred to as the left side surface 11k, and similarly the right side as the right side surface 11l. For the purpose of explanation, the direction when the rear side surface 11i in Figure 5 is viewed from the front inside the sleeping space 10 will be referred to as direction B. Furthermore, the outer casing of the sleeping space 10a, which is composed of the top surface 11g, the bottom surface 11h, the rear side surface 11i, the front side surface 11j, the left side surface 11k, and the right side surface 11l, is defined as the housing 5a.

[0048] Figure 6 is a side view of Figure 5 from direction B. The oxygen sensor 105, CO2 sensor 106, oxygen supply port 304, and oxygen flow path adjustment unit 305 are installed on the surface of the rear side 11i (described later) or in a position protruding from the rear side 11i towards the sleep space 10a. As will be described in detail later, an outside air inlet 410a is installed on the left side 11k of Figure 6, and a ventilation port 404a and ventilation duct 402 are installed on the right side 11l. In Figure 5, the outside air inlet 410a and ventilation port 404a appear to be positioned vertically offset for illustrative purposes, but in reality, as shown in Figure 6, the outside air inlet 410a and ventilation port 404a are positioned at the same height and facing each other.

[0049] The sliding door 13a is a plate-shaped member used to open and close the entrance 12 of the sleeping space 10a. The sliding door 13a is positioned on the front side 11j and is installed so as to seal the entrance 12. In other words, in the modified example, unlike in Embodiment 1, the sliding door 13a covers the entire surface of the entrance 12.

[0050] The oxygen supply port 304 is installed on the rear side 11i of the sleeping space 10a, similar to Embodiment 1, and is positioned on the floor side 11h of the ventilation port 404a (described later) in order to efficiently increase the oxygen concentration near the user's head 22. Here, the oxygen blown out from the oxygen supply device 300 passes through the oxygen supply duct 302 and is blown into the sleeping space 10a as an oxygen flow 306a via the oxygen supply port 304 and the oxygen flow path adjustment unit 305. The detailed flow of the oxygen flow 306a will be described later.

[0051] The ventilation device 400 takes in fresh air from the outside air inlet 410a via the ventilation opening 404a and ventilation duct 402a, and ventilates the sleeping space 10a as an airflow 600a. The detailed airflow of the airflow 600a will be described later.

[0052] Ventilation opening 404a is an exhaust vent for exhausting air from inside the sleeping space 10a. Ventilation opening 404 is installed on the right side 11l of the sleeping space 10a. As mentioned above, ventilation opening 404a is installed above the oxygen supply opening 304 (on the top surface 11g side of the sleeping space 10a than the oxygen supply opening 304).

[0053] The outside air inlet 410a is an outside air intake that draws in air from outside the sleeping space 10a. The outside air inlet 410a is installed on the left side 11k of the sleeping space 10a. The outside air inlet 410a is located above the top surface 11a of the sleeping space 10, above the oxygen supply inlet 304. The outside air inlet 410a is also opposite the ventilation inlet 404a.

[0054] Next, we will explain the airflow 600a and the oxygen flow 306a. First, the airflow 600a flows from the left side 11k to the right side 11l of the sleeping space 10a. More specifically, the airflow 600a flows from the outside air inlet 410a to the ventilation opening 404a, powered by the ventilation device 400. The airflow 600a flows above the user 20 (the top surface 11g of the sleeping space 10a), taking in respiratory substances such as CO2 exhaled by the user 20 and exhausting them to the outside.

[0055] The oxygen flow 306a flows in the direction of the floor surface 11h of the sleeping space 10a via the oxygen supply port 304 and the oxygen flow path adjustment unit 305. At this time, it flows in a manner that increases the oxygen concentration on the floor surface 11h side in the height direction of the sleeping space 10a, including the area around the head 22. Specifically, oxygen with a higher concentration than that of the sleeping space 10a flows as the oxygen flow 306a via the oxygen supply port 304 and the oxygen flow path adjustment unit 305. The blown-out oxygen diffuses downwards in the sleeping space 10a. In this way, the diffusion of high-concentration oxygen downwards in the sleeping space 10a results in a higher oxygen concentration below the sleeping space 10a compared to the oxygen concentration above the sleeping space 10a and the oxygen concentration outside the sleeping space 10a.

[0056] Based on the above configuration, the relationship between the airflow 600a and the oxygen flow 306a will be explained. The airflow 600a mainly flows along the top surface 11g side of the sleeping space 10a in the height direction (towards the top surface 11g from the oxygen supply port 304). In contrast, the oxygen flow 306a mainly flows along the floor surface 11h side of the sleeping space 10a in the height direction (towards the floor surface 11h from the oxygen supply port 304). In the space where the airflow 600a is dominant (towards the top surface 11g side of the sleeping space 10 in the height direction), CO2 exhaled by the user 20 flows in along with some of the oxygen flow 306 and is exhausted from the ventilation port 404a.

[0057] In contrast, in the space where oxygen flow 306a is dominant (the floor surface 11h side in the height direction of the sleeping space 10a), the oxygen concentration is higher compared to the top surface 11g side in the height direction of the sleeping space 10a due to oxygen flow 306a. This is because the ventilation openings 404a and outside air openings 410a are positioned so that the ventilation airflow 600 does not interfere with the lower part of the sleeping space 10a. In conventional ventilation designs, it was common to position the ventilation openings and outside air openings to replace the air in the entire space. For example, by positioning either the ventilation opening 404a or the outside air opening 410a below the oxygen supply opening 304, the airflow 600a flows from the bottom to the top of the sleeping space 10a, as in conventional designs. However, in such conventional designs, the air in the entire sleeping space 10a is exhausted, which presents the problem of exhausting the oxygen supplied from the oxygen supply opening 304 as well. In other words, in conventional designs, it was difficult to increase the oxygen concentration on the floor surface 11h side where the user 20 is located. In the configuration of this invention, the ventilation opening 40 is designed so that the airflow 600a flows above the sleeping space 10a, rather than across the entire sleeping space 10a. By positioning 4a and the outside air inlet 410a, the exhaust of oxygen from the ventilation opening 404a by the airflow 600a is suppressed. This makes it possible to maintain a high oxygen concentration on the floor surface 11h where the user 20 lies.

[0058] Furthermore, as in Example 1, the CO2 generated by the user 20 is more easily exhausted by the airflow 600a because, compared to when the user 20's head 22 is on the front side 11j, the distance to the ventilation opening 404a is shorter when the user 20's head 22 is on the rear side 11i, thus promoting exhaust. In other words, it is possible to suppress the need to increase the ventilation rate of the ventilation device 400 to promote exhaust. Therefore, since the increase in the ventilation rate of the ventilation device 400 can be suppressed, excessive exhaust of oxygen supplied from the oxygen supply device 300 can also be suppressed, making it possible to achieve a high oxygen concentration on the floor surface 11h side where the user 20 is located.

[0059] In this modified configuration, the ventilation opening 404a is positioned on the right side 11l and the outside air opening 410a is positioned on the left side 11k, resulting in a shorter distance between the ventilation opening 404a and the outside air opening 410a compared to the configuration of Example 1. By shortening the distance between the ventilation opening 404a and the outside air opening 410a in this way, deflection of the airflow 600a between the ventilation opening 404a and the outside air opening 410a can be suppressed. In other words, it becomes easier to guide the airflow 600a linearly above the sleeping space 10a.

[0060] As described above, the modified oxygen supply system 1000 can provide the following benefits. (1) The oxygen supply system 1000 comprises a housing 5a having a sleeping space 10a as an internal space, an oxygen supply device 300 for supplying oxygen to the sleeping space 10a, and a ventilation device 400 for ventilating the air in the sleeping space 10a. The housing 5a is provided with an oxygen supply port 304 connected to the oxygen supply device 300 for supplying oxygen to the sleeping space 10a, and a ventilation port 404a connected to the ventilation device 400 for exhausting the air in the sleeping space 10a. The ventilation port 404a is formed to be located above the oxygen supply port 304.

[0061] With this configuration, compared to the case where the oxygen supply port 304 is located above the ventilation port 404a, it is possible to suppress the exhaust of oxygen from the ventilation port 404a carried by the airflow 600a. In other words, the airflow 600a is less likely to interfere with the oxygen flow 306a. As a result, it is possible to efficiently maintain a high oxygen concentration on the floor surface 11h side where the user 20 is located. Therefore, a localized high-concentration oxygen space can be created around the user 20's face. (2) The oxygen supply system 1000 is provided with an outside air inlet 410a in the housing 5 for taking in outside air, which is outside air from the sleeping space 10a, into the sleeping space 10a, and the outside air inlet 410a may be located above the oxygen supply inlet 304.

[0062] With this configuration, compared to the case where the oxygen supply port 304 is located above the outside air port 410a, it is possible to suppress the exhaust of oxygen from the outside air port 410a to the ventilation port 404a carried by the airflow 600a. In addition, since both the outside air port 410a and the ventilation port 404a are positioned above the oxygen supply port 304, the airflow 600a is less likely to flow below the sleeping space 10a. As a result, the airflow 600a interferes less with the oxygen flow 306a, making it possible to maintain a high oxygen concentration on the floor surface 11h side where the user 20 is located. Therefore, a localized high-concentration oxygen space can be created around the user 20's face. (3) The oxygen supply system 1000 may be configured to include an oxygen flow path adjustment unit 305 that controls the direction of oxygen blown out from the oxygen supply port 304 downward.

[0063] With this configuration, compared to a system without the oxygen flow path adjustment unit 305, it becomes possible to reliably blow oxygen towards the vicinity of the user's head 22. This makes it possible to further increase the oxygen concentration on the floor surface 11h where the user 20 is located. Therefore, A localized high-concentration oxygen space can be created around the user's face 20. Furthermore, by directing the blown oxygen downwards, interference with the airflow 600a flowing above the sleeping space 10a can be avoided, and oxygen exhaust can be suppressed. (4) The oxygen supply system 1000 is partitioned by the floor surface 11h of the housing 5 having a sleeping space 10a, the top surface 11g facing the floor surface 11h, and a plurality of sides (rear side 11i, front side 11j, left side 11k, right side 11l) connecting the floor surface 11h and the top surface 11g, and the outside air inlet 410a is provided on one of the plurality of sides (left side 11k in Figure 6), and the ventilation opening 404a is provided on the opposite side facing the one side (right side 11l in Figure 6).

[0064] With this configuration, compared to a case where the outside air inlet 410a and the ventilation opening 404a are not located on opposing surfaces, the airflow 600a flows in a straight line, making it less likely to interfere with the oxygen flow 306a. This makes it easier to maintain a higher oxygen concentration on the floor surface 11h where the user 20 is located. Therefore, a localized high-concentration oxygen space can be created around the user 20's face.

[0065] Although the present disclosure has been explained above based on the examples, it can be easily inferred that the present disclosure is not limited in any way to the above examples, and that various improvements and modifications are possible without departing from the spirit of the present disclosure.

[0066] Regarding the terminology used above, the sleeping spaces 10 and 10a in this embodiment correspond to the "sleeping space" in the claim, the oxygen supply device 300 corresponds to the "oxygen supply device" in the claim, the ventilation device 400 corresponds to the "ventilation device" in the claim, the oxygen supply port 304 corresponds to the "oxygen supply port" in the claim, the ventilation ports 404 and 404a correspond to the "ventilation ports" in the claim, and the oxygen supply system 1000 corresponds to the "oxygen supply system" in the claim. In addition, the outside air ports 410 and 410a correspond to the "outside air ports" in the claim, the oxygen flow path adjustment unit 305 corresponds to the "flow path adjustment unit" in the claim, the floor surfaces 11b and 11h correspond to the "floor surface" in the claim, and the top surfaces 11a and 11g correspond to the "top surface" in the claim. Furthermore, when the ventilation port 404 and the outside air port 410 are arranged as shown in Figure 2, the front side surface 11d corresponds to the "one side surface" in the claim, and the rear side surface 11c corresponds to the "opposing surface" in the claim. Furthermore, as shown in Figure 6, when the ventilation opening 404 and the outside air opening 410 are arranged, the left side surface 11e corresponds to the "one side surface" of the claim, and the right side surface 11f corresponds to the "opposing surface" of the claim. [Industrial applicability]

[0067] As described above, the oxygen supply system according to this embodiment is useful as an oxygen supply system that efficiently increases the oxygen concentration around the user's face when it is difficult to raise the oxygen concentration in a well-ventilated space. [Explanation of Symbols]

[0068] 5, 5a Enclosure 10 Sleeping space 10a sleeping space 11a Top surface 11b Floor surface 11c rear side 11d Front side 11e Left side 11th floor, right side 11g Top surface 11h Floor surface 11i rear side 11j Front side 11k left side 11l Right side 12 Entrance / exit 13 Opening and closing doors 13a Opening and closing door 20 User 22 heads 105 Oxygen Sensor 106 CO2 Sensor 200 Control device 201 Oxygen concentration acquisition unit 202 CO2 concentration acquisition section 210 Oxygen concentration control unit 212 CO2 concentration control unit 300 Oxygen supply device 302 Oxygen supply duct 304 Oxygen supply port 305 Oxygen flow path adjustment section 306 Oxygen flow 306a Oxygen Stream 400 Ventilation system 402 Ventilation duct 402a Ventilation duct 404 Ventilation vent 404a vent 410 Outdoor air vent 410a Outdoor air inlet 600 airflow 600a airflow 1000 Oxygen Supply System

Claims

1. A housing that has a sleeping space as its internal space, An oxygen supply device that supplies oxygen to the aforementioned sleeping space, The sleeping space is equipped with a ventilation device for ventilating the air in the sleeping space, The aforementioned enclosure is An oxygen supply port for supplying oxygen to the sleeping space, which is connected to the oxygen supply device, It includes a ventilation opening connected to the ventilation device for exhausting the air from the sleeping space, The aforementioned ventilation opening is An oxygen supply system located above the aforementioned oxygen supply port.

2. The aforementioned enclosure is The sleeping space is equipped with an outside air vent for bringing in outside air, which is the air outside the sleeping space, The aforementioned outside air vent is, The oxygen supply system according to claim 1, which is located above the oxygen supply port.

3. The aforementioned enclosure is The oxygen supply system according to claim 1, further comprising a flow path adjustment unit that controls the direction of oxygen blown out from the oxygen supply port downward.

4. The aforementioned enclosure is floor surface and The top surface facing the floor surface and It is divided by a plurality of sides that connect the floor surface and the top surface, The aforementioned outside air vent is, One of the aforementioned multiple sides is provided on one side, The aforementioned ventilation opening is The oxygen supply system according to claim 2, provided on an opposing surface facing the aforementioned one side.

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