EP1555043A2 - Appareil pour l'allimentation en gaz mixte pour appareil respiratoire à circuit fermé - Google Patents

Appareil pour l'allimentation en gaz mixte pour appareil respiratoire à circuit fermé Download PDF

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Publication number
EP1555043A2
EP1555043A2 EP05000657A EP05000657A EP1555043A2 EP 1555043 A2 EP1555043 A2 EP 1555043A2 EP 05000657 A EP05000657 A EP 05000657A EP 05000657 A EP05000657 A EP 05000657A EP 1555043 A2 EP1555043 A2 EP 1555043A2
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EP
European Patent Office
Prior art keywords
gas
breathing
pressure
breathing circuit
sensor
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Application number
EP05000657A
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German (de)
English (en)
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EP1555043A3 (fr
Inventor
Bernhard Engl
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Individual
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Individual
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Publication date
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Publication of EP1555043A2 publication Critical patent/EP1555043A2/fr
Publication of EP1555043A3 publication Critical patent/EP1555043A3/fr
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B19/00—Cartridges with absorbing substances for respiratory apparatus
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/02—Respiratory apparatus with compressed oxygen or air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/12—Diving masks
    • B63C11/14—Diving masks with forced air supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/18—Air supply
    • B63C11/22—Air supply carried by diver
    • B63C11/24—Air supply carried by diver in closed circulation

Definitions

  • FIG. 1 shows the simplified basic structure of a Mixed gas - Kreislaufatemauss according to the prior art Technology [1] [2] [3] [4].
  • the device for mixing gas supply into the breathing circuit is mostly from an automatic valve for mixed gas (22), the one from a compressed gas tank originating and under one Medium pressure gas mixture (21) is supplied. Of the associated compressed gas tank and the pressure reducer are off For clarity, not shown.
  • the gas mixture usually exists in the case of diving equipment one or more inert gases, such as helium or nitrogen, and a small proportion of oxygen which is such that even at the maximum depth of a physiological dangerous too high oxygen partial pressure does not occur can.
  • inert gases such as helium or nitrogen
  • oxygen which is such that even at the maximum depth of a physiological dangerous too high oxygen partial pressure does not occur can.
  • mixed gas breathing apparatus for atmospheric conditions is used as a gas mixture ordinary largely dried and used oil-free compressed air.
  • the automatic valve (22) is usually as lung automatic Valve designed via a diaphragm (24) is controlled.
  • a relative negative pressure relative to the ambient pressure prevails, then presses the membrane (24) using a lever mechanism, a spring together and lifts the Valve from the valve seat, whereby the supplied to (21) Gas mixture at (23) flows into the mixing chamber (17).
  • the spring pushes the diaphragm back to the starting position and the valve closes again. This will ensure that the user regardless of the degree of filling of the counterlung always a full Take a breath out of the device.
  • diving equipment is Moreover, when diving always a relative negative pressure in the Breathing circuit avoided without the user has to intervene.
  • the gas sensor (1) a Gas-sensitive front (2) has, at the one sensitive diffusion membrane is located (not shown), while its backside with the electrical connections (4) an opening (3) which may not be closed, because below the circuit board (5) sits one Pressure compensation diaphragm (7), which for the pressure equalization of Electrolyte chamber (6) is necessary.
  • On the back Connection opening (3) of the gas sensor must be secured its correct function essentially the same pressure prevail as on its gas sensitive front (2).
  • this pressure equalization obstructs, such as through watertight Potting the back of the sensors with a synthetic resin, then the pressure equalization of the electrolyte chamber takes place Deformation of the sensitive diffusion membrane at the gas-sensitive front, which directly leads to measurement errors and long term leads to failure of the gas sensor.
  • the pressure compensation chamber (10) between the Circuit board (5) and the pressure compensation diaphragm (7) completely shed, as in the circuit board usually only there are a few small holes, mostly Through-holes of printed conductors, or bare Component positions that just barely for pressure equalization the pressure compensation chamber through a gaseous medium suffice.
  • a leak passes the aggressive Electrolyte fluid to the circuit board and zerfrisst their Tracks and soldered electronic components. A sudden failure of the gas sensor is the result.
  • the diving equipment according to [2] [3] try the solution of the Condensation problem thereby, by the soda lime around the Gas sensors is arranged around.
  • the principle of action exists here in it, the exothermic reaction of soda lime to warm up the Gas sensors to be used, which are lapped by the breathing gas. By the warming will be below the dew point at the electrical and electronic components, including theirs Connecting cables, prevented.
  • this working principle is not explicitly mentioned in [2] [3], though the whole peculiar design of the device is derived from it. Condensation at the critical parts is avoided as long as the soda lime has a sufficient temperature.
  • Another well-known principle of action to ward off condensation in respiratory equipment is the gas intended for analysis in a drying device to dry before the des gas-sensitive sides of the gas sensors or another Analyzer is supplied.
  • drying device An example of such a drying device is located in [9].
  • this requires a significant Auxiliary energy for electric heating, what an autonomous Respiratory equipment is not practical.
  • That of drying devices of this kind suggested prelude of a chemical drying agent in front of the gas-sensitive sides
  • the gas sensors would also have the disadvantage that the Desiccant to a sufficient for the measurement Flow should be monitored, and that without further energy-consuming means - such as pumps - and hardly It would be possible, the analyzed respiratory gas the cycle again supply or expel it from the respirator, wherein the latter would also be a detrimental waste of breathing gas.
  • the novel mode of action is based on the basic idea, in one Device for mixed gas supply in Kreislaufatemellan for Keep dry the electrical connection side of the gas sensors the mixed gas supplied from the automatic valve itself take advantage of this because of regulations be absolutely dry must be in order to avoid unwanted condensation in the Compressed gas tank and icing of the pressure reducer and the to avoid automatic valve.
  • the drying of the Mixed gas takes place according to the known prior art regularly already in the compressor, the compressed gas tank filled.
  • the used up Discharge breathing gas into the environment instead of preparing it causes the dry breathing gas regularly dryness in the Mouth of the user. Nevertheless, nobody seems to be up yet
  • the idea came from this intrinsically annoying property of a respiratory automatic valve derived dry respiratory gas in an advantageous manner as a novel mode of action for Keep dry the connection side of the gas sensors in one Exploit recirculation breathing apparatus.
  • This new mode of action can be used to keep dry electrical and electronic components of the respirator be extended.
  • First pressure compensators are by the two tasks characterized, first, the excess part of the automatic valve derived dry mixed gas in the Derive breathing circuit, so that at the pressure equalization membranes the gas sensors to the breathing circuit no Overpressure arises, and secondly, moist breathing gas from the To prevent breathing circuit from being connected to the connection sides of the Gas sensors or the other dry-containing electrical and electronic components.
  • First pressure compensating means are placed between the outlet of the automatic valve and the breathing circuit arranged.
  • the first Pressure equalizing means a single directional valve.
  • the breathing apparatus can also dry cartridges with a drying agent or a combination of at least a directional valve and a drying cartridge first Pressure compensation means are used.
  • the use of a Drying agent is always optional, because the Device according to the invention can also without such get along.
  • the device according to the invention succeeds for mixed gas supply in a surprisingly simple way, by Exploitation of the supplied from the automatic valve dry mixed gas condensation on the electrical connections and supply lines of the gas sensors or on other electrical or electronic components of the Respirator reliably prevent the interaction the automatic valve and the first pressure compensator always a perfect pressure equalization of the pressure compensation membrane the gas sensors ensured.
  • the invention has compared with previous solutions [10] [11] the same inventor the additional advantage, without aggravation the field interchangeability of the gas sensors on a Desirable to completely dispense drying agent, or such at least so much to spare that it is much rarer has to be exchanged than with the previous solution [11].
  • the invention has the Advantage, about a new mode of action to prevent the Condensation at the electrical connections of the gas sensors or to the other electrical or electronic Components of the breathing apparatus, its function proven at any time and also understood by lawyers can be, and that is why any suspicion as Potential cause of accident is sublime.
  • the invention thus defuses the product liability problem significantly paves the way for a flourishal march of it equipped electronically controlled mixed gas recirculation dipping devices on the world market.
  • FIG. 1 shows the simplified basic structure of a Mixed gas - Kreislaufatem advocatess according to the prior art Technology.
  • FIG. 2 shows a commercially available gas sensor according to FIG known prior art, to explain its internal Components partly cut open.
  • Figure 3 shows schematically the novel device for Mixed gas supply according to the main claim.
  • Figure 4 shows schematically a further developed novel Apparatus for mixing gas supply.
  • Figure 5 shows schematically a novel device for Mixed gas supply, in which the first pressure equalizing agent Directional valve is.
  • Figure 6 shows schematically a novel device for Mixed gas supply, in which the first pressure compensation means a Drying cartridge is.
  • Figure 7 shows schematically a novel device for Mixed gas supply, in which the first pressure compensation means a Combination of a directional valve and a drying cartridge are.
  • FIG. 8 shows by way of example the internal structure of a Combination with a directional valve first Pressure equalizing agent particularly suitable drying cartridge, the itself contains another directional valve.
  • Figure 9 shows an example of a longitudinal section through a Practical realization of the device according to the invention for Mixed gas supply in a rebreather, in which the Gas sensors in a particularly advantageous sensor unit are housed.
  • Figure 10 shows a cross section through the Sehsortician the Figure 9, from which the position of the pressure equalization channels of Sensor unit is completely recognizable.
  • a breathing circuit in which a breathing gas flow (29,30) flows, as well as an automatic valve for Mixed gas supply (22) and at least one gas sensor (1) with dry electric or electronic Components that are connected via its rear connection opening (3) are accessible.
  • the automatic valve compensates for a negative pressure, it opens when the breathing apparatus has a relative negative pressure Balance is, and it closes when the Negative pressure is balanced.
  • the invention is characterized in that in a Kreislaufatem réelle derived from the automatic valve dry mixed gas (23) is used to dry electrical or electronic components of the gas sensors.
  • the simplest realization of the device according to the invention contains an antechamber (34) over the first Pressure equalizing means (31) with the breathing circuit (29, 30) so in Connection stands that the gas located in the antechamber through the first pressure equalizing means into the The breathing circuit can escape as soon as it enters the antechamber greater pressure prevails than in the breathing circuit.
  • a smaller pressure prevail than in Breathing circuit then opens the automatic valve and it a pressure equalization takes place by the automatic from the Valve-derived dry mixed gas (23) in the antechamber flows.
  • the first pressure equalizing means may be on the side of the Breathing circuit at any point connected to this become. You could, for example, also in the deformable Sack of counterlung flow. For the sake of robustness and the However, the best possible function of the mixing process are Prefer realizations, where the first Pressure equalization means the pressure equalization between the antechamber and a solid mixing chamber (17) effect.
  • connection sides (3) of the gas sensors (1) stand with the antechamber (34) in connection, which am the simplest way can be realized that the Gas sensors are housed in a part of the antechamber, being screwed sealed in threaded holes, located in the wall between the mixing chamber and the antechamber are located.
  • a sealant is an O-ring, the usually with standard gas sensors standard on the foot the thread on its gas-sensitive front (2) already is available.
  • the gas-sensitive front pages (2) the gas sensors with the breathing gas flow (30) from the mixing chamber (17) directly related to what their function while their moisture sensitive ones are coming in Backs and their electrical leads in the dry prechamber (34) are located.
  • flawless Solutions for watertight implementation of electrical Connecting cables through housing walls to the evaluation electronics have long been known in the art.
  • the Evaluation electronics and the other electrical components can also be kept dry Pre-chamber will be accommodated if this is big enough is performed.
  • First pressure compensation means can be realized as a Directional valve, a drying cartridge, or a combination of Directional valves and a drying cartridge. Furthermore any conceivable means is the first one Pressure compensation means, as long as the tasks of the first Pressure equalizing means, already shown above, can fulfill.
  • Figure 4 shows schematically a further developed novel Apparatus for mixed gas supply, with said Accidents better cope, and in addition to a particularly advantageous realization of an optimal Temperature compensation of the gas sensors can achieve.
  • the second Pressure equalizing means (36) connect the interior of the prechamber with the interior of the sensor chamber (s) and they allow one bidirectional pressure equalization of the sensor chamber (s) with the Antechamber, this pressure compensation process is in the figure with the Gasflußpfeilen by the second pressure equalizing agent clarified.
  • Second pressure compensation means have the purpose of Connection sides of the gas sensors a more extensive protection against moisture or condensation in the case provide that an accident occurs in the device, the in particular the desired action of the first pressure compensation means diminished or abolished, so that contrary to the intentions of Invention yet humid breathing gas or even condensation from the breathing circuit back into the antechamber.
  • Second pressure equalizing means useful for this purpose may be used.
  • Possible realizations second Pressure compensation means are pressure equalization channels of small size Cross-section showing the gas exchange between the antechamber and the sensor chamber to the necessary pressure equalization measure restrict, or dry cartridges, a desiccant contain, or a combination of the said means.
  • the Use of directional valves would be here as well conceivable, but seems to be rather an unnecessary complication.
  • first pressure compensating means in connection with the device according to the invention in the manner of Figure 3 exemplified. It is understood that the hereby shown in the first pressure compensation means also in the further developed device used in the manner of Figure 4 can be.
  • FIG 5 is the simplest possible example Realization of the first pressure compensation means (31) as Directional valve (32) illustrated.
  • This directional valve allows it in the prechamber (34) located gas in the Mixing chamber (17) and thus to escape into the breathing circuit, if in the antechamber towards the breathing circuit relative overpressure prevails.
  • a relative negative pressure in the Antechamber equalizes the automatic valve (22), as already was detailed above.
  • Pressure compensation diaphragm is given by both commercial directional valves as well as commercially available automatic valves already at a few tens of millibar Can address pressure difference.
  • Suitable as a directional valve so-called mushroom valves made of an elastomeric material, or any other suitable valve for this purpose.
  • FIG. 6 shows by way of example a realization of the first embodiment Pressure compensation means (31), which also in the case of Exhaustion of the mixed gas supply pressure equalization of Prechamber and thus the gas sensors is always guaranteed, by the first pressure equalizing means (31) as a drying cartridge (33) is realized, in which there is a desiccant, that in the figure as small balls within the part cut dry cartridge is shown.
  • the drying cartridge at Pressure compensation processes mostly from dry from the automatic valve (22) derived mixed gas (23) in the direction flows through the mixing chamber (17), and the drying agent is spared.
  • Some types of drying agent are by them flowing dry mixed gas even regenerated something.
  • the drying cartridge must be in this Case, however, have a relatively large cross-section.
  • Diving equipment is not such a realization practicable because at great depths the breathing gas is a much larger Density than under atmospheric conditions.
  • Respiratory equipment for atmospheric conditions has the realization according to Figure 6 but the advantage, without directional valves get along, which are known to be prone to failure than Dry cartridges. Such is for the latter application about as big as an ordinary gas mask filter.
  • Figure 7 shows schematically and by way of example also for Diving apparatus suitable modification of the device of Figure 6.
  • first pressure compensation means (31) realized by a combination of directional valves (32) and a Drying cartridge (33) containing a desiccant.
  • an overpressure in the antechamber (34) can be in it located gas via the directional valve (32) in the Mixing chamber (17) and thus enter the breathing circuit.
  • This gas flow symbolized by the lower arrow of (34)
  • it is subject to only low resistance the directional valve.
  • At a negative pressure in the antechamber can Breathing gas from the breathing circuit from the mixing chamber over the Dry cartridge with the desiccant in the Get to the antechamber. This gas flow is symbolized by the upper arrow, from (17) to (34).
  • Negative pressure in the antechamber can with proper function of the automatic valve on not occur. However, this speaks too insensitive or delayed, or is the one supplied to (21) Mixture of gas completely exhausted, then provides the drying cartridge that, nevertheless, a pressure equalization takes place, and that the Gas sensors are not caused by too much negative pressure in the Damaged antechamber.
  • FIG 8 shows an example of the cross section through a Drying cartridge (33), which has its own directional valve (32) contains.
  • a drying cartridge in which the Desiccant is a directional valve upstream, is for a device according to Figure 7 particularly suitable, since the Desiccant is spared best possible.
  • a convenient one Construction of such a drying cartridge from left to right, consists of a spring washer (57) having a valve cap (58) in the drying cartridge locked and against resilient curved Screen discs (59) presses on the desiccant (60) to hold his place.
  • a gas-permeable filter material (61) provided, for example Cotton wool.
  • Such a drying cartridge can with its thread, on right end recognizable, in a device in type of figure 7 in the partition between the mixing chamber (17) and the Prechamber (34) releasably and sealed attached.
  • Sealant is an O-ring.
  • the gas that flows through them contains water vapor remove moisture and bind it, For example, a silica gel in spherical shape.
  • Figure 9 shows an example of a longitudinal section through a Practical realization of the further developed device for Mixed gas supply in an electronically controlled self-mixing rebreather whose sensor unit is in executed particularly advantageous manner, whereby at expedient arrangement of the sensor unit within the Respirator and when choosing a material with good Thermal conductivity is the best possible function of Temperature compensation of the gas sensors are ensured can. This succeeds especially when the sensor unit from Breathing gas flow is washed around.
  • the exhaled breathing gas (28) from the exhalation tube (15), the connected to a nozzle of a central section (37), first in a circulating distribution chamber (38) and then About at the radius distributed bean in the absorber chamber (39).
  • the Atemkalkpatrone (16) from the respiratory gas flow lapped and thus against the wall of the absorber chamber thermally insulated. Collecting at the bottom of the absorber chamber Condensation or by short-term loss of the mouthpiece Penetrated seawater can through a drain valve (51) off be expressed by the breathing apparatus by using a manual control knob (41) on the automatic valve (22) an overpressure is produced in the breathing apparatus.
  • soda lime cartridges are not the object of this invention, but it should be noted that instead of the here shown symbolically and simplified axially flowed Atemkalkpatrone also a radial perfused soda lime cartridge can be used. In a such would be the feed holes then on the circumference and at the center of the cartridge would be one dürchlochtes central tube are located.
  • the Gas sensors are mounted in a base body (44), wherein their gas-sensitive front sides (2) into a central bore (45) of the base body, and wherein the gas sensors (1) each in individual sensor chambers (35) sitting through the detachable connection of sensordomes (46) to the main body (44) are formed.
  • This detachable connection can be a Be screwed.
  • the gap between sensor dome and Body is sealed, for example with an O-ring.
  • This produced a pressure equalization in the sensor chambers can be located in the body Pressure equalization channels (47), in the figure 8 due to the location the section only partially visible, with which the Sensor chambers are connected and by di e also the electrical leads of the gas sensors (25) are guided can.
  • These pressure equalization channels in the main body of Sensor unit, described in more detail later in Figure 9 are about Supply pipes (48) connected to the pre-chamber (34). Then the pressure compensation channels and the supply pipes act as second pressure compensation means according to the characteristics of Invention, because they provide the pressure balance between the Prechamber and the sensor chamber ago.
  • the antechamber is formed by a suitable sealed intermediate bottom (56) in the housing tube (54) of the Respirator is used.
  • This intermediate floor separates the Prechamber (34) from the mixing chamber (17).
  • Supply pipes (48) may not be stable enough to hold the Intermediate floor via the sensor unit with the middle section too can connect between the intermediate floor and the Middle section additional stable studs are provided. In general, however, such a measure is not necessary because the base body (44) and the sensor dome (46) of the sensor unit (43) and the supply pipes (48) preferably made of metal manufactured and therefore stable enough.
  • the middle section preferably turns off made of a stable plastic, then no Cold bridge between the environment and the sensor unit.
  • Another variant for the realization of the second Compression means would be that one of the Main body originating supply pipes in a drying cartridge opens that between the sensor chamber and the Prechamber during pressure equalization flowing gas in addition Dries while the other supply pipes, which then only to Guide the electrical leads used to the sensors be sealed with a sealant so that they themselves no longer act as second pressure equalizing agent.
  • the first Pressure balance means a drying cartridge or a combination used from a drying cartridge and from directional valves is, because if a desiccant is already present and Maintenance costs brings, then is a second drying agent to further increase the moisture protection no substantial overhead.
  • the first pressure equalizing means (31) but only as a Directional valve (32) realized.
  • a completely exhausted Mixed gas supply would force to emergency rescue.
  • During the emergency climb can but opposite in the antechamber only a relative overpressure is created in the breathing circuit, then via the directional valve in the breathing circuit escapes.
  • the characteristics of the invention are thereby realized by the mixed gas (23) coming from the automatic valve (22) first enters the pre-chamber (34), which then happens if in the breathing apparatus relative to the environment a relative Negative pressure prevails, which opens the automatic valve.
  • Out the antechamber reaches the incoming dry mixed gas (34) to the connection sides of the gas sensors and thus on their Pressure equalization membranes.
  • second pressure equalizing means 36, 47, 48
  • the Gas sensors are housed in individual sensor chambers (35).
  • These sensor chambers are within one particular advantageous sensor unit (43) according to claim 11 characterized formed sensor dome (46) in a base body (44) of the Detachable sensor unit, which is a central bore (45), which flows through the respiratory gas to be analyzed becomes.
  • the automatic valve derived mixed gas (23) via the first pressure equalizing agent (31), which is designed here as a directional valve (32), in the Mixing chamber (17) and thus supplied to the breathing circuit.
  • the dry held pre-chamber contains in this practical Embodiment also the evaluation electronics (26) and the Dosing valve (19) for the oxygen. This allows the waiver on waterproof cable glands.
  • the Dosing valve (19) passes the oxygen originating from it the mixing chamber (17), where it is located with the there Breathing gas mixes.
  • the thus regenerated breathing gas (30) passes through the sensor unit through at the gas-sensitive sides of Gas sensors (2) over a pipe bend (49) and a Feedthrough tube (50) into the inhalation tube (13).
  • the Passage tube pierces the used Exhaled gas leading circulating distribution chamber (38) and is sealed against this.
  • the body of the Respiratory equipment consists of housing tubes (54) which are detachable, but sealed to the center section (37), wherein the ends of the device are closed with lids (55).
  • the Device is by means of a running along the central axis Tie rod (52) held together at the top by means of a thread is screwed into the upper lid, and the at the lower end with a handwheel (53) is connected.
  • Figure 10 shows a cross section through the particular advantageous sensor unit of Figure 9 in height of the central axis the gas sensors (1).
  • the main body (44) of the sensor unit There is a central bore (54) through which the regenerated breathing gas flows and thus to the gas-sensitive Front sides (2) of the gas sensors arrives.
  • the gas sensors are connected to the body releasably and sealed.
  • sensor dome (46) also with the main body detachably and sealed connected to one for each gas sensor own sensor chamber (35) to form.
  • pressure equalization channels (47) are present. These can be designed so that they are already within the Sensor unit the interior of the sensor chambers with each other connect. Such pressure equalization channels can than as from Sensor chambers leading holes of small cross-section, which in lead larger vertical holes in the body, executed become.
  • the Inventive device for mixed gas supply in Circulatory breathing apparatus largely independent of the nature of the Respirator is very versatile and convertible. she can depend on the field of application and the specific Requirements of the respective breathing apparatus by a choice of more or less complex pressure compensation means in be optimally designed, resulting in a variety possible variants results in the context of the description not all can be listed, so the description in no way as an exhaustive treatise of all possible Variants is to be considered.
  • the possible variants and conversions The invention is based solely on the claims of Invention.
  • the valves, including the automatic valve in any convenient way will be realized.
  • the automatic valve instead of a membrane also via a pressure sensor be electronically controlled.
  • the directional valves can be spring-loaded discs made of a suitable material.
  • First pressure compensation means can be on their the mixing chamber facing side a water-repellent, but gas-permeable Diaphragm of sufficient cross-section upstream to sloshing condensation that is in the breathing circuit can be located from the first pressure compensation means keep.
  • the new device for mixed gas supply in Circulatory breathing apparatus achieved by inventive use the supplied dry mixed gas for keeping dry the electrical and electronic components of the gas sensors an improved over the prior art Drying effect and she is remarkably simple Working principle also understandable for lawyers and therefore about beyond doubt.
  • the new device can optionally use dry cartridges use a desiccant, but then achieved against the previous solution [11] a much longer service life of Desiccant.
  • Be the first pressure equalizing agent Directional valves are used together with a drying cartridge, so that the desiccant only in case of failure of the Pressure equalization of the pre-chamber via the automatic valve is flowed through, the desiccant is only in such Accidents consumed, and usually does not need more often be replaced as the gas sensors themselves, what about once Can be done during a routine maintenance in the year.
  • the description also discloses a rebreather the inventive device for mixed gas supply in one Variant is used, which do without desiccant examined. This is based on the consideration that a failure of the Mixed gas supply the diver in any case to an immediate Ascension forces, leaving a vacuum in the antechamber as well no longer arises and therefore no longer about one Desiccant must be balanced.
  • This Rebreather uses one for temperature compensation the gas sensors particularly advantageous Sensor unit in a total construction, in the dry cartridges if necessary, as first and second pressure compensation means could be retrofitted, which is another Advantage of this design is.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP05000657A 2004-01-14 2005-01-14 Appareil pour l'allimentation en gaz mixte pour appareil respiratoire à circuit fermé Withdrawn EP1555043A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004002034 2004-01-14
DE102004002034A DE102004002034A1 (de) 2004-01-14 2004-01-14 Vorrichtung zur Mischgaszufuhr in Kreislaufatemgeräten

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Publication Number Publication Date
EP1555043A2 true EP1555043A2 (fr) 2005-07-20
EP1555043A3 EP1555043A3 (fr) 2007-08-01

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EP05000657A Withdrawn EP1555043A3 (fr) 2004-01-14 2005-01-14 Appareil pour l'allimentation en gaz mixte pour appareil respiratoire à circuit fermé

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DE (1) DE102004002034A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112243940A (zh) * 2020-01-15 2021-01-22 江门市埃尔特机械设备有限公司 一种渔业养殖用增氧机
EP3895977A4 (fr) * 2018-12-14 2022-09-28 "Aquabreather" LLC Appareil respiratoire isolant individuel à circuit fermé destiné à l'immersion sous l'eau

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009018003U1 (de) 2009-04-20 2010-12-23 Tauchtechnik Schmitt Gmbh Vorrichtung zur Mischung von Gasen
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US3710553A (en) 1970-01-28 1973-01-16 Biomarine Industries Carbon dioxide scrubber and breathing diaphragm assembly for diving apparatus
DE2104153A1 (de) 1971-01-29 1972-08-24 Drägerwerk AG, 2400 Lübeck Tauchgerät mit Kreislauf
DE3790537C2 (de) 1986-09-19 2002-06-13 Perma Pure Inc Fluidtrocknungsvorrichtung
EP0819936A1 (fr) 1996-07-19 1998-01-21 Teledyne Industries Inc. Capteur de gaz électrochimique à compensation de température améliorée et méthode pour surveiller de près les variations de température d'un gaz à surveiller
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WO1999013944A1 (fr) 1997-09-18 1999-03-25 A P Valves Appareil respiratoire autonome
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IL282974B1 (en) * 2018-12-14 2025-03-01 Aquabreather Llc Individual closed-circuit rebreather for underwater diving
IL282974B2 (en) * 2018-12-14 2025-07-01 Aquabreather Llc Individual closed-circuit rebreather for underwater diving
CN112243940A (zh) * 2020-01-15 2021-01-22 江门市埃尔特机械设备有限公司 一种渔业养殖用增氧机

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