Recreation room and method for controlling the atmosphere in the room

Translation of description of equivalent WO 2004050003 A1

Lounge and method for adjusting the room atmosphere

The invention relates to a method for adjusting a room air in a common room, where the air is supplemented continuously or in recurring time intervals with nitrogen or a nitrogen-containing, carbon dioxide-poor gas mixture such that the oxygen content of the air is less than 20.9%. The invention also relates to a common room for people or animals, in particular a sports training room, which is filled with air, which has a partial pressure of oxygen lower than the lounge surrounding outside atmosphere. Finally, the invention relates to an air conditioning for such a common room.

Under a lounge space is seen in the present case, in which people or animals may reside. In particular, a lounge is also understood a sports training room.

Sports practice rooms whose air has a relative to a surrounding sports exercise room outside atmosphere reduced oxygen partial pressure, are funda- additionally known. Also methods have been known as such a reduced oxygen partial pressure is set in the lounge.

In the simplest case, the total air pressure is reduced in the living room to the outside atmosphere. In this way, have been raised in the lounge-like pressure conditions a, as they also prevail at higher altitudes. To lower the total air pressure in the common room, the lounge, however, must be sealed almost hermetically. This is very costly. In the case of a sports exercise room the necessary air exchange is possible only with considerable effort.

Therefore, for example, were described in EP 0959862 and EP 0789546 proposes not to lower the total pressure in the lounge, but the partial oxygen pressure in the dayroom thereby lowering that of Stickstoffpar- is partial pressure increases. It has been found that the proposed method to bring all high operating expenses and a costly operation with them.

Starting from this prior art, the present invention seeks to provide a method as well as a lounge and a room air installation of the aforementioned type, which enable a cost-effective way of operating a lounge, whose air has a reduced proportion of oxygen.

This object is achieved by a method of the type mentioned, is set in the in the lounge at least a slight overpressure compared to a surrounding the lounge outside atmosphere. The carbon dioxide content of the room air is adjusted to a concentration initially below 0.04% by volume and a CO2 concentration below established limits, but no more than 1 to 0.65 vol%. The setting of the desired oxygen content of the room air as well as the desired carbon dioxide content is done by periodically complete the room air, preferably in the recirculation of the room air.

The invention is based on the realization that only a slight overpressure, of for example 10 to 100 hPa requires only very moderately sealed space and leads that remaining leaks of the lounge a constant exchange of air in the lounge thus bringing about that air escapes through the leaks and supplied through the room air conditioned ambient air is replaced from the outside atmosphere.

Preferably, the air is guided in the recirculation mode, and supplemented by recirculation operation by the nitrogen-containing, low-carbon gas mixture. The caused by the recirculation air exchange the air in the living room is preferably adjusted so that in the lounge there is a homogeneous atmosphere.

Under a nitrogen-containing, carbon dioxide-poor gas mixture, a gas mixture is meant which is opposed to an outside or ambient air has a greater nitrogen content.

The carbon dioxide content of indoor air is preferably adjusted by that in recirculation mode the air a portion of the room air will be replaced by low-carbon air from the outside atmosphere. The air of the outside atmosphere here has a normal oxygen content. The proportion of the information exchanged in the recirculation air is adjusted so that the indoor air carbon dioxide concentration of initially less than 0.04% by volume and a CO2 concentration below established limits remains, but has at most 1 to 0.65 vol%.

Alternatively, it is possible to reduce the carbon dioxide content of the air by chemical means, in particular by means of Spezialkalk.

Preferably, the run in recirculation mode room air is treated by controlled ionisation such that the indoor air with respect to the outer atmosphere reduced oxygen content and low carbon content maintains high air quality over several recirculation cycles. By the controlled ionization in particular the proportion of hydrocarbons is reduced in the indoor air. In this sense, is considered an essential criterion of the air quality of indoor air whose content of hydrocarbon and germs. The mixing of the gas mixture for addition of air preferably takes place at high or low pressure. The mixing is preferably carried out in a mixing chamber, which is supplied as a function of the desired composition of the gas mixture of the mixing chamber with over or under pressure, the components to be mixed of the gas mixture. If the mixing of the gas mixture is carried out at overpressure, the components are supplied at different pressure to the mixing chamber. If an underpressure prevails in the mixing chamber, the components of the gas mixture are supplied with different negative pressure of the mixing chamber. Preferably, the components of the gas mixture to an air from the outside atmosphere and the other nitrogen.

Preferred is a method, wherein the nitrogen-containing gas mixture is produced by air separation by means of a separation plant, which is added to the room air in the recirculation mode, and in which the circulating air also ambient air or nitrogen or a nitrogen-containing gas mixture is mixed in an amount of at an equivalent air separation resulting air with increased oxygen content corresponds. Such a process allows a room air with reduced oxygen partial pressure using a separation plant to produce.

In determining the equivalent of the obtained in the air separation air with increased oxygen content has to be considered, which discharged from the separation plant air volume flow with increased oxygen content of only Abluftvo- is not volume flow. Rather, a multiple of the discharged from the separation plant exhaust air volume flow of the circulating air in fresh ambient air (fresh air flow) or to nitrogen-enriched gas mixture to be supplied, so that there is at least a second air flow which is branched off from the circulating air flow and, together with the from the separation plant abgeführ- th exhaust airflow and the leakage volume flow for a balanced volume balance ensures.

Also preferred is a method in which the nitrogen-containing gas mixture is produced by air separation from ambient air. For this purpose, the aforementioned separation plant may be used.

In connection with the last-mentioned method, an accumulating in the air separation oxygen-enriched gas mixture having an oxygen content of more than 21% by volume added to a second room. In this second space thus there is an atmosphere with increased oxygen content, which is for particular purposes, such as therapeutic treatment desired.

The room air with an increased oxygen content in the second space is preferably treated as well as the room air in the space with reduced oxygen content.

Preferably at least one of the properties of the circulating air, such as air humidity, air temperature or the like is adjusted measured and controlled.

According to the invention the above object is achieved in particular by a common room of the aforementioned type, a sports training room, which is designed so that it can at least maintain a small positive pressure relative to a surrounding the lounge outside atmosphere at least for a short period. The lounge is connected via an air inlet and an air outlet opening with a room air conditioning, which is implemented in the lounge adjust the room air so that the oxygen partial pressure is less than the oxygen partial pressure of the outside atmosphere.

Under a lounge that can at least maintain a small positive pressure relative to a surrounding the lounge outside atmosphere at least for a short period, in the context of this invention a lounge is understood that is sufficiently tight during operation, In order to guarantee a leak rate that is less than 10% and preferably is below 5%. As leakage rate here the ratio designated by a leakage flow to the Aufenthaltsaum supplied in operating total current is emerging from the dayroom total power includes, in addition to the leakage flow already mentioned also a recirculation air flow. This is that room air fraction which is discharged by means of the lounge to be reprocessed in the circulation process.

Preferably, the oxygen concentration or partial pressure of oxygen, the concentration of carbon dioxide or the carbon dioxide and humidity, air quality, ozone and the air temperature are provided in the lounge sensors for sensing. A room air conditioning to achieve the above object comprises a recirculation duct and at least one pump or fan to move the air recirculation in the return air duct. The return air duct to be connected via inlet and outlet openings with a lounge of the aforementioned type. connected in the recirculation channel is a mixing chamber which has, for an air inlet and an air outlet for recirculation and on the other an inlet for fresh air from the Außenatmoshäre and a nitrogen inlet for supplying nitrogen into the mixing chamber.

The essential characteristics and advantages of the method and the room air conditioning according to the invention are summarized below:

- The simulated height corresponding oxygen concentration in Trainingsund lounges will promptly controlled and regulated according to the task to predetermined sizes with low tolerance;

Intended changes in concentration can be temporally quickly and effectively carry out;

- The carbon dioxide concentration in training and living spaces should be kept stable below established limits but at least below 0.65% by volume;

The gas mixture fed to the volume amount can be flexibly adapted to the requirements;

The air quality is permanently maintained;

- The hypoxic atmosphere in the room is on the supply of two components - nitrogen (nitrogen content greater than 78% by volume of more than 100% by volume) and fresh air (oxygen content 20.9% by volume) - produced, manufactured separately and the outside air or partially are even taken from the room air and volume-fed current controlled;

- The nitrogen is optionally generated by an industrial-use air separation plant (by different means) locally in variable quantity (air separation plant with attached buffer) or tanks bereitge- provides; The length of the nitrogen line between the air separation unit and the mixing chamber can be varied so that no additional sound exposures occur in the region of Hypoxieraumes;

The required composition of the gas mixture is before the initiation of the space in a mixing chamber connected upstream generated (see

Figure 1);

The separate production of the individual components nitrogen and fresh air as well as their controlled delivery via electronically controlled valves made possible by the shutdown of a component while increasing the volume flow of the other component, either a rapid increase in the equivalent amount (reducing the oxygen concentration in the room by only supplying nitrogen) or a rapid decrease in the equivalent amount (increasing the oxygen concentration by sole addition of fresh air); The period of time to produce the desired equivalent height can thus compared the supply line of a constant gas mixture into the desired final concentration can be reduced to a fraction, and the cost for producing the equivalent height also decrease considerably. The equivalent height is the height above the sea, in the air we breathe has about the same oxygen partial pressure as in the lounge.

The variable controllability of the partial volume flows, thus the total volume flow of supplied hypoxic gas mixture from the mixing chamber allows for an increase in the number of people in the room or at an intensity increase of physical activity to increase immediately the gas mixture flow, thereby preventing an increase in carbon dioxide concentration;

A microelectronic control and regulation (eg DDC) allows the partial volume flows to regulate so that Störgrößeneinflüsse be immediately compensated and a constant oxygen concentration is ensured. Oxygen consumption of passive and active people in the room is offset by the appropriate addition of fresh air. Fresh air intrusion be controlled by reducing the volume of fresh air-stream by entering and exiting the room.

With the increase of carbon dioxide concentration in the space above the specified limit the total volume flow is automatically enlarged on the increase both subcomponents volume flows. The increased flow causes an increased air exchange in the room and thereby also reduce the concentration of carbon dioxide; The volume flow is increased until the carbon dioxide concentration is again below the prescribed limits.

- The intended change of air (amount of gas mixture volume flow) alone does not secure the desired air quality. This is achieved by an additionally installed in Hypoxieraum air circulation system and the regulated ionization in the air circulation cycle. In this system, which directs the air present in the Hypoxieraum through special filters and ionizer gereglten and recycled into the room, sweat and other harmful substances (germs) are eliminated primarily. The ventilation by incoming gas mixture and effluent gas mixture is used primarily to reduce the carbon dioxide concentration;

The invention will now be explained in more detail with reference to the accompanying drawings. The drawing shows in:

Figure 1: a lounge with attached thereto air conditioning for generating and regulating a hyperbaric hypoxic atmosphere in the lounge; and in

2 shows a scheme for the supply and discharge of the gas mixture in and out of the lounge

Figure 3: a lounge with connected thereto, alternative room air conditioning, which cooperates with an air separation unit to produce a nitrogen-containing gas mixture; in Figure 4: an arrangement of two lounges that are connected to an air conditioning and a common separation unit such that an oxygen-reduced air lounge and other lounge oxygen-enriched air contains; in

Figure 5: Three rough schematic views of a lively area, with reduced oxygen content and water basins; and in

Figure 6 shows a hypoxic dayroom with ice or snow slopes, in Figure 6a is a plan view of an elliptical skating rink and in Figure 6b shows a cross section through a tunnel for the elliptical rink...

The Hypoxieanlage according to Figure 1 comprises the following components: a lounge - hereinafter referred Room 1 - for staying and physical activities of humans and / or animals, a buffer tank 2, a mixing chamber 3, a humidity-processing unit 32, a temperature-processing unit 33, a regulated ioniser 4, a particulate filter 5, a first pump 61, a second pump 62, electronically or otherwise controllable flow valves (MFC or other) 71 to 79, an inlet of used room air 81, an inlet 82 for nitrogen, a first inlet 83 fresh air, a second inlet 84 for fresh air, an outlet 88 for used air, a mixing chamber outlet 89, a connecting line 90, a distributor 91 for freshly mixed room air, a pickup and Abieiter 92 for used air, a second connecting line 93, a Scrabber 12 for the chemical elimination of carbon dioxide, a 100 CPU for an electronic control and regulation (DDC or other) and sensors 110 for oxygen, carbon dioxide, water vapor, temperature, air pressure, air quality and ozone.

The terms air and atmosphere are discussed below as synonyms and relate to the air in the room 1 and the associated room air conditioning. To distinguish the surrounding the area 1 outside atmosphere, which is formed of fresh air.

Operation of Hypoxieanlage of Figure 1 is as follows: The plant is used either the production of an oxygen-reduced (<20.9% by volume) and low-carbon atmosphere (<0.04% by volume) in a closed or almost closed room 1 and / or control an oxygen-reduced (<20.9% by volume) and low carbon dioxide atmosphere (fixed limit) in a closed or almost closed room 1 the stay, with or without physical activity of people and / or animals.

As passive operation producing an oxygen-depleted atmosphere described below is called.

The preparation of a reduced oxygen (<20.9% by volume) and carbon dioxide-lean atmosphere (<0.04% by volume) in the closed or almost closed space 1, is performed in a passive mode as follows: By opening the valves 77, 79 and 72 is nitrogen (vol% N₂ > 78; O₂ <20.9; CO₂ <0.04; H₂O to 0) via the inlet 82 by means of the pump 61 or by the inherent pressure of the nitrogen when it is removed from a pressurized container, via the connection 90 and special ventilation ducts 91 with the respectively located in room atmosphere, a uniform mixing of the nitrogen ensure passed into the closed or almost closed space first By means of the pump 62 or higher using pressure in the chamber 1 is controlled opening of the valve 74 with the valve closed 75 via special ventilation channels 92, which ensure a uniform extraction of the newly mixed room atmosphere, only so much room atmosphere via the output 88 in the ambient atmosphere deduced that in the room, an overpressure is maintained. This process is maintained until the room 1 the desired oxygen-reduced (<20.9% by volume) and low-carbon atmosphere (<0.65% by volume) is present.

The for producing alternative or supplementary control an oxygen-reduced (<20.9% by volume) and low-carbon atmosphere (fixed limit, z. B. 1 vol% or 0.65% by volume) in a closed or almost closed room 1 at the residence and / or physical activity of humans or animals is done in an active operating either in a partially closed air circulation system or in a closed recirculation system.

First, the active mode - the regulation of the atmosphere - described in a partially closed air circulation system. The regulation of an oxygen-reduced (<20.9% by volume) and low-carbon atmosphere ^ established limit value, for example 1% or 0.65% by volume) in a closed or almost closed room 1 at the residence and / or physical activity of humans or animals, happens in active operation in a partially closed air recirculation system as follows: The air circulation cycle is completely set in motion. The valve 75 is opened so that the atmosphere extracted from the chamber 1 through a particle filter 5 and a regulated ionizer 4, which removes all pollutants hydrocarbon base from the atmosphere enters through the inlet 81 into the mixing chamber 3rd Optionally, a Scrabber 12, the carbon dioxide by chemical bonds from the atmosphere is eliminated, are interposed in the air flow. Via the inlet 82 are nitrogen and via the inlet 83 ambient air, hereinafter referred to as a fresh air that passes through a particulate filter 5, in a volume ratio to each other that corresponds to the desired reduced oxygen concentration in the room 1, passed into the mixing chamber. Via the inlet 84 a further amount of fresh air is passed through a particulate filter 5 into the mixing chamber. This amount of fresh air compensates for the oxygen consumption which in the room 1 people or animals. She stands in a certain relation to the motion intensity which in the room 1 humans or animals and is determined by the dynamics of oxygen consumption in space 1 and controlled automatically. The amount of oxygen contained in the fresh air quantity must be greater than the amount of oxygen consumed. The volume of nitrogen (inlet 82) and fresh air (inlets 83 and 84) corresponds to the sum of the volume amount spent atmosphere, which has previously been derived via the output 85 to the ambient atmosphere and the volume of the quantity of spent atmosphere, RESISTING through existing leaks - escapes dig or by disorders such as inward and outward transfer of people or animals in and out of the room 1 from the circulation into the surrounding atmosphere. The volume amount which is derived to the surrounding atmosphere or re-established by mixing nitrogen and fresh air is determined by the dynamics of the carbon dioxide concentration and the specified limit concentrations of carbon dioxide in the room 1 and automatically controlled so that an equilibrium (steady state ) is present or set limits are not exceeded. The manufactured in the mixing chamber with reduced oxygen content (<20.9% by volume) and low-carbon atmosphere ^ established limit value, for example 1% or 0.65% by volume) from recycled used atmosphere and Neuanteilen of nitrogen and fresh air before leaving of the mixing chamber 3 climate technically processed to the desired temperature ture and humidity in the room 1 stably present. In addition can be done in the room 1 another climate technical processing of the atmosphere. From the mixing chamber the recycled atmosphere through the outlet 89 and the valve 72 by means of pump 62 or by the inherent pressure of the conditioned atmosphere either via a buffer container 2, which can store the treated atmosphere, or directly via the connecting line 90 and special ventilation channels 91 is ensuring uniform mixing of nitrogen to the atmosphere each in the room, passed into the closed or almost closed room. Through regulated opening of the valves 74 and 75 62 or the present in- creased pressure in the space through special ventilation ducts 92, which ensure a uniform propagation of used space atmosphere, so much room atmosphere via the outlet 88 is discharged into the surrounding atmosphere by the pump, as necessary for keeping within the limits of the carbon dioxide concentration in the room 1 and the receipt of a positive pressure in the room. The spent room atmosphere which is to the volume of which was discharged through the outlet 88 to the ambient atmosphere, is reduced, is passed through the particulate filter 5 and the controlled ionizer 4 for re-processing into the mixing chamber. Optionally, the remaining spent room atmosphere over a Scrabber 12 for additional elimination of carbon dioxide out. The mixing process in the mixing chamber 3 can take place under slight overpressure, large positive pressure or negative pressure. When mixing oxygen-reduced (<20.9% by volume) and low in carbon dioxide atmosphere (established limit value, for example 1% or 0.65% by volume) with a slight overpressure, the components spent atmosphere, nitrogen and fresh air with a pressure, the pressure on the the atmosphere in the room 1 is located, give GE in the mixing chamber and the pressure of the newly manufactured atmosphere via the valve 79 and the leads 90 and 91 is reduced so that the pressure prevailing in the chamber 1 pressure remains constant. When mixed with vacuum is reduced oxygen (<20.9% by volume) and low-carbon atmosphere ^ established limit value, for example 1% or 0.65% by volume) produced intermittently and passed through the buffer continuously in the room. 1 The pump 61 withdraws the mixing chamber via the valve 79 made atmosphere, whereas the valves 75, 76, 77 and 78 closed. By subsequently regulated opening of these valves are temporally and quantitatively differentiated the components spent atmosphere, nitrogen and fresh air regulated routed and processed into new atmosphere in the mixing chamber. With the closing of the valves 75, 76, 77 and 78, this process is repeated. The pump 61 promotes the atmosphere made in the Buffer tank, through the done a controlled continuous release of the manufactured atmosphere by means of special ventilation ducts 91st When mixed with a large excess pressure is reduced oxygen (<20.9% by volume) and low-carbon atmosphere ^ fixed threshold, eg., 1 vol% or 0.65% by volume) produced intermittently and passed through the buffer continuously in the room 1. The components spent atmosphere, nitrogen and fresh air are the inlets 81, 82, 83 and 84 with great pressure of time and quantity differentiated passed into the mixing chamber while the valve 79 is closed. After closing of the valves 75, 76, 77 and 78, the valve 79 is opened. By closing the valve 79, this process is repeated. The pump 61 promotes the atmosphere produced in the buffer reservoir, takes place via the a controlled continuous release of the produced atmosphere by means of the special ventilation ducts 91st The type of mixing - low compression, great positive pressure or negative pressure - influences the quality of the atmosphere produced and is determined depending on the desired composition of the atmosphere in the room 1, the required volumetric flow rate and the present interference.

Now the active mode for a closed air circulation system is described.

The regulation of an oxygen-reduced (<20.9% by volume) and low-carbon atmosphere ^ established limit value, for example 1% or 0.65% by volume) in a closed or almost closed room 1 at the residence and / or physical activity of humans or animals, happens in active operation in a closed air circulation system as follows: the air circulation cycle is completely set using the pumps 61 and 62 in transition. The valve 74 is closed and valve 75 is opened so that the suctioned atmosphere from the space 1 through a particle filter 5 and a regulated ionizer 4, which removes all pollutants hydrocarbon base from the atmosphere via the inlet 81 into the mixing chamber 3, the connecting line 90 and the special ventilation channels 91 is returned to the room. 1 Optionally, a Scrabber 12, the carbon dioxide can be eliminated by chemical bonds from the atmosphere, interposed in the air flow. The closed system can be operated as long as the carbon dioxide concentration limits are not exceeded and the oxygen concentration does not leave their normal ranges. These conditions are present in very large volume. After reaching the Limits can either be completely replaced the atmosphere or the process is switched to the operation of a partially closed recirculation system.

For all operating modes, all hardware components from a single micro-electronic control unit in the form of a DDC - system is controlled and with the help of sensors for oxygen, carbon dioxide, water vapor and pollutant concentrations and for the volume flows used atmosphere, nitrogen, fresh air and crafted atmosphere, temperature in the room 1 are adjusted to the desired setpoints.

Figure 2 shows the ventilation of the room 1. Show Of the reference numerals:

1 - a gas mixture feed with variable flow and forwards-slanting outflow

2 - a ground-suction of the recirculation system

3 - a pollutant removal system in recirculation system

4 - outflow of the purified and carbon dioxide-enriched gas mixture

5 - a suction line with controllable variable section

6 - the training or lounge under hypoxia

For the supply and discharge of the gas mixture a forced guidance is provided. The amount of gas mixture, which varies according to the requirements is blown for a small additional pressure from the ceiling obliquely downward (Figure 2). After it has passed the exercising individuals, it is a ground-level air circulation system, which cleans the resulting mixed atmosphere of pollutants sucked and again so blown from the front and side walls for further use in the space that a backward air movement is generated. At the rear of the room, the same amount of air is at a slight negative pressure corresponding to the pressure during injection, actively aspirated. The drum-shaped air movement through the space ensures a better removal of the carbon dioxide-loaded gas mixture as the diffuse discharge through different predetermined openings. Flexibly the inflowing gas mixture quantity adapting waste suction ports (cross-section) for the consumed gas mixture allow operation with different and changing persons.

The arrangement of lounge 300 and Air Conditioning 310 shown in Figure 3 differs mainly in terms of air conditioning 310 of the illustrated in Figure 1 room air conditioning. Common ingredients are an air inlet 312 and an air suction 314 in the living room 300. The heat removed from the common room 300 room air via a pump 316, an ionizer 318 and filter 320, a Scrabber 322, a mixing chamber 330 and a second Inflated 332 in recirculation mode air supply 312 supplied in the common room 300 again. Unless and also with respect to the valves, not illustrated, etc., the air circulation system of Figure 3 does not differ from that of Figure 1. Also, with regard to the fact that the mixing channel is supplied 330 fresh air and nitrogen-containing gas mixture or nitrogen, is common. The same applies to a buffer tank 334 for any necessary pressure equalization. All valves are connected to a control and regulation DDC illustrated in Figure 1, which is also connected to sensors in the lounge 300th

However, the arrangement shown in Figure 3 from lounge 300 and air circulation system 310 differs from the arrangement shown in Figure 1 essentially in that for generating the nitrogen or the nitrogen-containing gas mixture, which is supplied to the mixing chamber 330, an air separation unit is provided 340th This air separation unit 340 is input side so connected via a line 342 to the common room 300 that the separation unit receives 340 room air from the living room 300, that air is separated into a nitrogen-enriched fraction and an oxygen and carbon dioxide-enriched fraction and supplying the nitrogen-enriched gas portion of the mixing chamber 330th The nitrogen-enriched gas portion 340 produced by the air separation unit may be nearly pure nitrogen, which was obtained by air separation of air from the lounge 300th The part of the air separation unit 340 of the mixing chamber 330 supplied nitrogen-enriched gas portion is mixed in the mixing chamber 330 in the same manner with fresh air, as is the case with the room air conditioning according to FIG. 1 That the air separation unit 340 supplied air is the air out of the common room 300, has the advantage that this air already having an increased proportion of nitrogen and that also at least part of the ERS from the room air in the recreation room 300 at the air separation in the air separation unit 340 separating carbon dioxide and leading to the outside.

The arrangement shown in Figure 4 with two lounges, a first dayroom 400 with oxygen-reduced air and a second common room 410 with oxygen-enriched air, with respect to many details in terms of a respective common room 400 or 410 assigned Umluftan- would the arrangement shown in Figure 3 correspond. An essential part of an air circulation circuit 402 for the lounge 400 and a second recirculation circuit 412 for Lounge 410 is a respective mixing chamber 404 or 414. Both mixing chambers 404 and 414 are fed from an air separation unit 420th This air separation unit 420 whose input is not connected to the residence premises, but is having fresh air supply (port 422). The accumulated in the air separation nitrogen-enriched gas mixture is fed via a line 424 of the mixing chamber 404 of the first holding area 400 with oxygen-reduced air. The resulting also in the air separation oxygen-enriched gas mixture is fed via a line 426 to the second mixing chamber 414 for the recirculating air circuit 412 of the second recreation room 410 with oxygen-enriched air.

The design of the air conditioning for the first holding area 400 with oxygen-reduced air can exactly match the room air conditioning shown in FIGS. 1 and 3

Regarding the air conditioning for the second sitting room 410 with oxygen-enriched air is obtained with respect to the mixing chamber 414, a difference which is that the mixing chamber instead of one inlet for oxygen-enriched gas mixture, corresponding to the rise of nitrogen-enriched gas mixture in Figures 1 and 3 would, another inlet is still 428 provided for oxygen or oxygen-enriched gas mixture. In Figure 5 is shown with oxygen-reduced or oxygen-enriched atmosphere, a special variant of a common room 500th The peculiarity of the recreation room 500 is that it has a reaching into a water basin 502 partition 504 which terminates below a water level 506 and allows that the water basin extends beyond the recreation room 500, for example, in an adjacent room or even outdoors. The adequate sealing the recreation room 500 from the environment is given by the water basin 502 and projecting into the basin 502 partition 504th This allows swimmers through the water pool in the residence spatial inside and dive out of it.

As already shown with respect to the stay spaces in the Figures 1 and 3, in each case a feed line 508 and a drain 510 of oxygen-enriched or oxygen-reduced space for supplying air and discharging the room air are provided.

An entry lock 512 allows dry access to Lounge 500 without much air exchange between the indoor air in the lounge 500 and the ambient air.

In Figure 6, finally, a common room is 600 presented with an ice or ski 602nd For example only, the ice or snow slopes are 602 represented as elliptical path over the lounge 600 with oxygen-reduced or oxygen-enriched air by corresponding chamber walls 604 and a ceiling 606 is limited. A special feature of the recreation room 600 is that the supply of oxygen reduced or oxygen-enriched gas mixture close to the ground near the ice or ski 602 is done by along the ice or snow slope 602 extending leads 610th The supplied through the leads 610 gas mixture can be cooled and thus advantageously assist in maintaining the ice or snow slopes.

A routing of the gas mixture is preferably implemented in the area of ​​the ceiling 606 of the lively area 600 along the ice or snow slope 602 extending dissipation 612th